Why is it said that electric boilers were built in accordance with the big age? Mainly lies in the performance characteristics of electric boilers in line with the needs of the times. Electric boilers have the characteristics of fully automatic and intelligent operation, zero pollution, super environmental protection, and high operating efficiency, which is exactly what our modern society needs.

Coal-fired boilers are very polluted. Many large smokestacks with black smoke are now being removed and gradually replaced by electric boilers. Electric boilers have been recognized by the market as a new type of heating equipment that uses electricity as its energy source.

With the development of the times, energy saving and environmental protection will be the trend of development for now and in the future for a long time, and electric boilers are exactly in line with this characteristic, so it will not be eliminated by the times or rejected by the market. The equipment has received strong support from the state.

The market for traditional boilers is not only restricted by investment scale and national economic development, but also affected by energy and environmental protection policies. So far, many large and medium-sized cities have reduced the number of boilers that use coal for combustion, and cyclic high-efficiency, energy-saving and environmentally friendly electric boilers have received increasing attention.

There is no doubt that electric boilers using clean and pollution-free fuel technology will be the mainstream of the future boiler market. In order to meet the needs of the market, electric boilers are also constantly developing and progressing. In particular, the electric hot water boiler with a small footprint and simple operation is suitable for heating and heating, and is therefore loved by consumers. The development prospect is naturally very good.

With the development of urbanization in China, electric boilers have also become one of the boiler equipments that have attracted much attention.

Electric boilers have many excellent performance advantages such as simple operation, long operating time, corrosion resistance, and efficient operation, and they have gradually become a mainstream of development in the future. As people do not know much about electric boilers, but are deeply attracted by its excellent performance, it will inevitably be more worried about whether electric boilers can be used safely.

The Fangkuai boiler manufacturer combines years of research and development and understanding in the boiler field. From our current knowledge of electric boilers to the final analysis of safety in use, the overall development of electric boilers is still feasible.

Electric boilers have already successfully attracted the attention of different people in terms of their safety performance. Only when we pay more attention to the application of electric boilers, everyone is more willing to choose the optimal electric boiler use standards as various types of future work. Where the awareness program is.

However, the use of electric boilers is based on the quality of their products. As long as this type of boiler equipment can exhibit superior quality characteristics during use, users can use them in accordance with the safety manual during use. Similar kitchen appliances are safe.

No matter what electrical products our customers are using, safe use and proper operation are essential. From our current knowledge of electric boilers, we can perceive that all current knowledge about electric boilers starts with performance standards for safe use; electric boilers are now more stable and reliable in their use and development.

Oil-fired gas boiler is the main force in the heating system, which can provide a steady stream of heat for the heating system. With the premise of comprehensive attention to energy saving and emission reduction in today's society, how can oil-fired boilers be used in heating systems to solve the problem of boiler energy saving, which can save money and operate efficiently?

Zhengzhou Fangkuai Boiler will tell you that if you want to improve the thermal efficiency of the boiler and heating system and reduce energy consumption, you need to strengthen the maintenance of the daily operation of the boiler, analyze the factors that affect the thermal efficiency of the boiler during the operation, and formulate Come up with effective solutions.

Fuel is the most consumed in the use of oil-fired gas boilers. To make energy-saving measures, we must start with the choice of fuel. Under current social and economic conditions, there are three main boiler fuels, namely solid fuel, gas fuel and liquid fuel.

From the overall situation, gas fuel has great advantages in terms of heating quality and environmental protection. It should be given priority when selecting fuel. In the fuel selection of fuel oil, because of the higher cost, it is often more expensive to select this fuel in boiler heating.

In terms of combustion methods, the combustion forms of different forms of fuel are different: gaseous fuels are mainly flamed and flameless, and flamed combustion is gas-phase combustion. The flame is longer and has a clear contour. The speed of combustion is strongly related to the mixing speed of air. Flameless combustion refers to solid-phase combustion. The combustion speed is fast and the combustion temperature is high. The disadvantage is that the combustion capacity is small.

Liquid fuels also have two types of combustion, namely high-pressure atomization and low-pressure atomization. High pressure atomization is more suitable for some larger boilers. Although it can effectively recover the waste heat of the flue gas, the operating cost and energy consumption are relatively high. The low-pressure atomization is mainly applicable to small and medium-sized oil-fired and gas-fired boilers. The energy consumption and cost are relatively high. Although it is not convenient to collect flue gas, the corresponding method can still be used to collect waste heat.

In general, when selecting fuel for oil-fired gas boilers, various conditions should be compared according to the actual situation to determine the most suitable fuel and combustion method.

Electric boilers are a type of boiler equipment that uses electrical energy. According to different output media and uses, electric boilers can be divided into electric boiling water boilers, electric drinking water boilers, electric tea water stoves, electric tea stoves and so on.

Electric hot water boilers are also called electric heating boilers, electric heating boilers, electric heating boilers, electric bath boilers, electric bath boilers, etc. Electric hot water boilers are hot water produced using the latest electric heating technology and control systems designed to meet heating or supply life, Fully automatic environmental protection boiler for hot water for bathing. This type of boiler is widely used in domestic hot water and heating in places with high appearance requirements such as hotels, villas, factories, office buildings, government agencies, universities, hospitals, and troops; at the same time, this type of boiler is also the star of Fangkui boiler manufacturers. product.

According to different structures, electric boilers can be divided into two types: direct-heating electric boilers and regenerative electric boilers. As the name implies, direct-heating electric boilers will not be explained here any more. Regenerative electric boilers are based on electricity The department encourages the use of electricity for heating during the trough and enjoys preferential electricity prices. It has introduced a new type of energy-efficient electric heating products.

The regenerative electric boiler is equipped with a regenerative hot water tank and ancillary equipment to form a regenerative electric boiler system. The hot water in the regenerative water tank is used for heating to achieve the goal of using all or part of the valley power. Electric steam boilers are also called electric steam boilers. Electric steam boilers refer to steam boilers that use power to heat and generate rated pressure.

Electric steam boilers can be used for textiles, printing and dyeing, papermaking, food, rubber, plastics, chemicals, medicine, steel, metallurgy and other industrial products processing process steam; and after the configuration of heat exchangers can also be used for enterprises, institutions, hotels, schools , Heating, bathing, air-conditioning and domestic hot water in catering, service and other industries.

Gas boilers have many applications in cold season heating and industrial production. Gas hot water boilers can output high temperature hot water, while gas steam boilers can continuously provide high temperature and high quality steam. In order to make our gas boilers better serve us, we must arrange regular cleaning procedures for the boilers to avoid boiler failures. Why is cleaning a gas boiler a necessary process? Let's take a look with the Fangkuai boiler manufacturer!

First, prevent scale accumulation
       Gas boilers require a large amount of water supply during use. These waters are not completely pure water, but water containing some impurities. When these waters are heated for a long time, a lot of scale will be generated. This is because the water contains Calcium sulfate decomposes in a high temperature state and combines with calcium and magnesium ions to form scale. If a large amount of scale is accumulated in the boiler, it is very likely to cause different degrees of corrosion to the bottom of the boiler.

Second, improve the safety of the boiler
       The importance of the gas boiler determines that if the necessary cleaning work cannot be performed on the interior of the boiler, it will greatly affect various safety indicators of the gas boiler in the production process. This is mainly because those scales will cause the temperature of the water-cooled wall of the boiler to continue to increase without cleaning, which greatly increases the risk coefficient of the water-cooled wall's tube explosion, which directly affects the safe operation of the boiler.

Third, reduce waste of resources
       The scope of application of gas boilers is very wide, so the number of gas boilers used is also large. However, once the cleaning work cannot keep up with the accumulation of scale, the thermal conductivity of the boiler will be greatly reduced. In this situation, in order to ensure sufficient heating capacity, only the temperature of the furnace fire must be continuously increased, that is, the consumption of fuel is increased, resulting in a waste of resources.

Generally speaking, the thorough and perfect cleaning work has played a key role in the normal operation of the gas boiler. The reasons are mainly divided into three aspects: the cleaning work can reduce the scale accumulation inside the boiler; it can also greatly improve the gas The safety of the boiler's operation avoids resource consumption and eliminates waste of resources.

Energy efficiency testing of boiler equipment is a very important and authoritative test for boiler manufacturers and customers using boilers. The test results obtained after the energy efficiency test are powerful indicators for measuring whether the performance indicators of the boiler products of the boiler manufacturer have reached the guaranteed value. In addition, it can also identify the main factors that affect the results of energy efficiency testing, and by analyzing the influencing factors, manufacturers can adjust short-term items to make the product more efficient and safe. The ultimate beneficiary of these adjustments is the customer, because the detection content such as the thermal efficiency of the boiler directly affects the energy consumption of the boiler and is related to the interests of the customer.

So what do boiler energy efficiency tests do? Zhengzhou Fangkuai Boiler Company will give you the answer.

The main contents of the boiler energy efficiency test are as follows.
       1. Boiler thermal efficiency test
       The main tests are boiler evaporation, boiler excess air coefficient detection, exhaust temperature, fuel combustion efficiency, boiler thermal efficiency test, fuel consumption, and gas-air ratio.
       2. Energy efficiency test of new boiler products
       Determine whether the various thermal performance indicators of the boiler are consistent with the design and determine the operation mode of the equipment. Such as boiler evaporation, boiler thermal efficiency, combustion efficiency, various heat losses and so on.
       3. Boiler operation adjustment test
       Determine the most economical mode of operation of the boiler, and identify defects in the operation of the boiler. Such as the maximum boiler load, minimum boiler load, fuel requirements, economic load, reasonable exhaust temperature, optimal air coal ratio, excess air coefficient, secondary air ratio and so on.
       4. Contrast test of thermal performance before and after boiler renovation
       Test changes in evaporation, effects of combustion, boiler thermal efficiency, and more.
       5. Fuel industry analysis, element analysis
       Judging the quality of fuels such as coal, oil, and gas is convenient for enterprises to control the quality of fuel entering the plant.
       6.Water quality detection and scale sample analysis
       Judge the water quality, control the boiler water index, and prevent boiler scaling.

The thermal efficiency of an industrial boiler is an important indicator for measuring the economic performance of the boiler. In simple terms, the higher the thermal efficiency of the boiler, the higher the economy, and the waste of fuel reduces the primary power consumption. How to improve the thermal efficiency of industrial boilers, or buy an industrial boiler with high thermal efficiency, has become the focus of manufacturing enterprises.

Regarding the thermal efficiency of industrial boilers, the boiler has design efficiency at the engineer design stage. Generally speaking, the actual operation is similar to the initial design thermal efficiency. For example, the efficiency of oil and gas furnaces is greater than 92%, and the efficiency of circulating fluidized bed boilers is usually higher than 88%. However, the boiler efficiency is not fixed. If your equipment is operating at a rate lower than the design efficiency, then measures can be taken to improve the boiler thermal efficiency.

Improving the thermal efficiency of industrial boilers can increase the various heat losses of the boiler by adding ineffective application heat, the focus of which is to reduce the boiler exhaust heat loss and the loss of machinery not completely extinguished. Zhengzhou Fangkuai Boiler Company will briefly explain some specific operation methods for everyone.

1.Reduce boiler exhaust heat loss
       (1) Reduce the air leakage rate of the air preheater, especially the air leakage rate of the rotary air preheater;
       (2) Strictly control the water quality target of boiler water. When the scale in the water-cooled wall tube reaches 400mg / m, it should be pickled in time;
       (3) Burn high-quality fuel with low sulfur content as much as possible and lower the air temperature at the inlet of the air preheater. The ancient large-capacity power generation boilers were equipped with air preheaters to avoid condensation on the heating surface of the cold front end of the air preheater. Incurred high temperature corrosion of the air preheater.

2.Reduce the heat loss caused by mechanical failure
       (1) Adjust the extinguishing conditions according to the boiler load and time, and reasonably distribute the air so that the fuel is fully extinguished in the furnace;
       (2) Adjust the feeding amount according to the fuel volatile content and time to maintain the optimal amount of fuel.

3. To reduce the heat loss of the boiler, not only the thermal insulation measures of the boiler itself must be in place, but also the maintenance and repair of the boiler pipes and the thermal insulation layer of the boiler must be enhanced.

Steam quality is an important indicator for measuring the overall quality of a gas-fired steam boiler. This is because many companies purchase gas-fired steam boilers directly using steam. If the steam quality is not high, it is likely to affect the entire production of the project. Process and the quality of the final manufactured item. So, how do enterprise users choose a gas-fired steam boiler with good enough steam quality?

1. Cleanliness of gas steam boiler
       There may be rust and carbonate deposits in the steam pipeline, and there may be residual welding slag and sealing material fragments during installation. These impurities will cause blockage and damage to valves and equipment, and will also increase pipeline wear. The way to improve cleanliness is to equip gas steam boilers with pipe filters to deal with these impurities in real time.

2.Dryness of gas steam boiler
       Factors such as improper water treatment for gas-steam boiler water treatment, irrational boiler level control, and excessively high peak loads for a short period of time will cause the phenomenon of co-transpiration of the boiler, causing the boiler outlet to carry boiler water. When the steam moves in the pipe, the heat dissipation of the pipe will cause a part of the steam to condense, adding condensed water in the pipe. Adding a steam-water separator is a useful way to improve steam dryness. An efficient steam-water separator can improve steam dryness to 98%.

3.Purity of gas steam boiler
       There will be air in the steam system. This is because the steam generated in the boiler still inevitably contains a small amount of air. In addition, there will also be air when the pipes and equipment are started. When the system and equipment are stopped, the air is sucked in due to the internal vacuum.

Air has a low thermal conductivity and is a poor conductor of heating. The steam system contains air, which will reduce the production capacity of steam equipment, and also increase the corrosion of pipelines, valves and equipment. The most useful way to eliminate non-condensable gases such as air in the steam system and improve the purity of the steam is to install an automatic air exhaust device in the system.

From a professional perspective, the capacity of a steam boiler is called "tonnage," and the capacity of a hot water boiler is called "power." Learn to switch between power and tonnage, you can quickly and easily understand the parameters of the boiler.

For hot water boilers, the boiler power is expressed in MW (1MW = 1000kW) or million kcal / hour (ten thousand kcal / h).

For a steam boiler, its power is also called the evaporation capacity, which is the amount of water converted into steam per hour: ton / hour (T / h) or kilogram / hour (kg / h). Of course, it can also be expressed in MW or KW.

In China, the correspondence between evaporation and power is:
       1T / h = 1000kg / h = 0.7MW = 720kW = 600 thousand kcal / h = 600Mcal / h.
       Units of power are also horsepower (Hp) and boiler horsepower (BHp).
       1Hp = 0.745kw, 1BHp = 9.81kw

In some European and American regions, the steam boiler evaporation capacity is often marked with "at 212", which means that its evaporation capacity refers to the evaporation of 212 degrees Fahrenheit of water to 212 degrees Fahrenheit, which means that the water evaporation at 100 ° C Amount of steam at 100 ° C. In this way, 1kg of evaporation is equivalent to 540kcal of heat. We call it "equivalent evaporation", that is: 1T / h = 540,000 kcal / h. It can also be deduced from this that the relationship between boiler horsepower and "equivalent evaporation" is: 1BHp = 15.62kg / h.

In boiler equipment, these parameters also have corresponding conversion relationships.
       1 ton / hour (t / h) ≈ 60 × 104 kilocalories (kcal) / hour (kcal / h) ≈ 0.7 megawatt (MW) ≈ 720K kilowatt (KW)
       2. Boiler evaporation and boiler horsepower 1 ton / hour (t / h) ≈ 71.1 boiler horsepower (BHP);
       3. Boiler pressure engineering unit and international unit of measurement 1 MPa (Mpa) ≈ 10 kgf / cm2 (kgf / cm2);
       4. Megapascals and Pascals 1 Megapascal (Mpa) = 106 Pa (pa) 1 Pa (pa) = 0.01mbar (mbar) ≈ 10-5 kgf / cm² (engineering atmospheric pressure) (kgf / cm2) 1 pa (Pa) ≈0.1 millimeter water column (mmH2O);
       5. Force and gravity 1 kgf (kgf) = 9.81 Newton (N);
       6. Calories 1 kcal (kcal) = 4.187 kilojoules (KJ);
       7. Volume (volume) 1 cubic meter (m3) = 1000 liters (L) 1 liter (L) = 1000 milliliters (ML).

Industrial boilers are generally steam boilers used for power generation or gas supply. For example, in a chemical fertilizer plant, steam can be vaporized, coal is used as raw materials, and synthetic fertilizers. This is a typical industrial boiler. As an important thermal power equipment, industrial boilers have propped up the sky of manufacturing.

According to different structures, industrial boilers can be divided into three types: fire tube type, fire tube type and water tube type.

1.Fire tube boiler
       It was an early boiler. There were only one or two fire pots in the pot for heating the pot water. There were burning devices in the fire pots. Due to the low thermal efficiency, large volume and steel consumption of fire tube boilers, production has basically ceased since the 1960s.

2.Fire tube boiler
       In addition to a fire tube, a number of smoke pipes are installed in a vertical or horizontal pot shell. The high-temperature flue gas generated by the combustion of fuel in the combustion chamber passes through these smoke pipes to heat the boiler water, and then is discharged into the chimney. Compared with the fire tube boiler, due to the large number of smoke pipes, the heating area is increased, the exhaust temperature is lower, the thermal efficiency is higher, the steel consumption and the boiler volume are smaller. The evaporation capacity of fire tube boilers is generally not more than 15 tons / hour, the working pressure is generally not more than 1.6 MPa, the thermal efficiency of coal-fired boilers is generally about 70%, and the more intelligent fuel gas boilers, the thermal efficiency can reach 85% -98 %about.

3.Water tube boiler
       Water tube boilers are mostly used in industrial industries with large capacity and high pressure requirements. They are divided into natural circulation and once-through boilers according to the different circulation methods. Natural circulation water tube boilers have single and double drums. After the convection tube bundle of the double-boiler water tube boiler, an energy saver is generally provided, and an air preheater is sometimes provided to reduce the exhaust temperature. The efficiency can reach 80% when burning coal, and it will be higher if it is fuel gas. There is no drum in the once-through industrial boiler, and the heating surface is composed of a tube coiled on the inner wall of the furnace and a convection tube bundle at the back. Feed water enters from one end of the pipe and steam exits from the other. Once-through industrial boilers are small in size and generally have a steam-water separator and an automatic control device.

Heating and heating boilers belong to the category of civilian life boilers. With the improvement of people's safety awareness and the popularization of centralized heating, since 2000, buildings have been heated with hot water as the heat medium, and steam boilers are not allowed. Generally speaking, the heating boilers we refer to are hot water boilers.

There are many types of heating and heating boilers, and their classification is mainly divided according to the type of fuel. They can be divided into electric heating boilers, oil heating boilers, gas heating boilers, coal-fired heating boilers, and biomass heating boilers. Oil-fired heating boilers and gas-fired heating boilers are the more common types of heating boilers.

Everyone needs to determine the boiler parameters according to their own needs. It must not be too small and the boiler supply cannot meet their own needs, and it must not be too large and cause waste of resources. Zhengzhou Fangkuai Boiler Co., Ltd. sorts out methods for determining parameters of steam boilers and hot water boilers for some industries that use boilers widely.

Most of the boilers required by industrial and mining enterprises for production are steam boilers, and the steam output by the boilers is mostly used in production that requires a certain amount of heat to meet the production process requirements, such as textile printing and dyeing, food sugar, rubber paper, Petrochemical and other industries. Therefore, according to the requirements of the production process, determine the saturated steam parameters of the boiler, and accurately determine the parameters of the saturated steam to ensure that the temperature required for production is constant.

Generally speaking, the pressure of the boiler is always higher than the saturated steam pressure required for production. The reason is to overcome the pressure loss in the pipeline or pipe network. Many users have also found that the pressure on the boiler nameplate is much greater than the pressure required for production. For example, many users have purchased a 13-pressure boiler, but in fact only use 5 gauge pressure or 6 gauge pressure operating pressure. Operating at such low pressures has an adverse effect on steam quality. Because the pressure decreases, the specific volume of the steam increases, and the flow velocity at the outlet greatly increases, which causes the phenomenon of steam carrying water to rise. The pressure required for general production plus the pressure drop required to overcome all pipeline resistance, plus a pressure margin of 25% to 30% is sufficient.

For hot water boilers required for heating and heating, the commonly used temperature parameters are the supply and return water temperatures of 95/70 ° C. At present, there are three types of domestic urban heating; thermal power plants, regional boiler rooms, and scattered small-capacity boiler rooms. The former two are centralized heating, and the district boiler room heating is the development direction. At present, the majority are scattered small capacity boiler rooms. For district heating, the high temperature hot water boiler, supply and return water temperatures will develop 130/70 parameters. At present, three grades of 95/70, 115/70, and 130/70 are available for selection in hot water boiler products. The operating pressure of hot water boilers in actual use is mostly lower than the design pressure, which is mainly limited by the original pipe network system.

How to determine the capacity of a boiler when choosing an industrial boiler is an important issue. Generally speaking, the output or capacity of the boiler should be determined according to the steam consumption or heating area in the production process and the heat supply required for domestic hot water. First of all, the user must find out the total load range; second is the peak situation, including the peak load duration, the frequency of the peak, that is, the periodicity of the peak, such as the number of monthly peaks, weekly, monthly, and winter and summer in a year The difference. After understanding the demand and peak of the boiler load, you can consider the equipment capacity and number of units. In the selection, we must also consider the problem of the amount of emergency shutdown.

The reserve capacity generally refers to a standby boiler. The standby boiler does not need to be started when the original boiler is working normally. If the original boiler fails and is shut down, the standby boiler must be started immediately. This needs to be determined according to the importance of the user itself. If the continuity requirements in production and use are high, the issue of standby equipment must be carefully considered.

The economic load of a general boiler is more than 75% of the rated load, so the actual load of the boiler in use should always be more than 50% of the rated load of the unit itself, which means that the equipment provided by the manufacturer is between 50% and 100% of the rated output. It should be stable and efficient. In the past, users often purchased too much margin for safety reasons, which caused the equipment to operate under low load for a long time, which was very uneconomical. Generally, for boiler rooms with a total capacity of 8 tons / hour or a thermal power of more than 6 megawatts (MW), three units are more suitable. Due to the difference between winter and summer, you can choose different output equipment. However, it is more convenient and economical to choose the same equipment for new boiler rooms in terms of operation, maintenance, and management. Such auxiliary arrangement of auxiliary equipment of boiler room can be reasonably arranged. If you consider the high and low peaks and the big differences between winter and summer, you can also choose two big and one small equipment. According to the needs of the new boiler room, you can choose more equipment than three, but it should not be too much. Instead of using many equipment, choose a higher capacity equipment. In the current situation of domestic equipment quality, it is necessary to consider standby units.