Boilers are widely used in various fields of contemporary society and national economy. At this stage, most of the electricity in China is obtained by using steam to drive generator sets to generate electricity. Industrial and agricultural (such as machinery, chemical industry, paper industry, textile industry, agricultural product processing industry, etc.) Steam is inseparable from the production process, and all the heat energy required for air conditioning and domestic hot water comes from high-temperature hot water or steam. Therefore, the boiler has become an important special equipment that is indispensable for modern social production and people's lives.

Gas steam boiler is a thermal energy conversion device that uses natural gas, liquefied gas, city gas and other gas fuels as fuel. The heat released in the furnace heats the water in the boiler and vaporizes it into steam. The water is constantly being The energy released by the combustion of gaseous fuel in the furnace is heated, and the temperature rises and generates pressurized steam. Since the boiling point of water rises with the increase in pressure, the pot is sealed, and the expansion of water vapor inside is restricted to produce pressure formation. Thermal power is widely used as an energy source. Gas boilers are very different from coal-fired boilers. They use burners to inject gas into the boiler chamber for combustion without using grate equipment. In addition, no solid ash is produced after combustion of the gas boiler, so there is no need to use slag discharge equipment. However, if the mixture of gas and air injected into the furnace in a fixed space is extinguished, it will easily explode. Therefore, the gas boiler must adopt a highly automated combustion control system. Compared with coal-fired boilers, gas-fired boilers have the advantages of high combustion efficiency, environmental protection, simple and compact structure, low operating safety and noise, simple operation and easy automatic combustion control. Small and medium-sized gas-fired boilers are gradually replacing small and medium-sized coal-fired boilers. The trend has a very broad development prospects.

To say that the auxiliary accessories that escort industrial boilers are inseparable from the three major safety accessories of safety valve, pressure gauge and water level gauge. With their assistance, the boiler can always operate safely and stably. Qiu Gong from Zhengzhou Fangkuai Boiler Factory came to explain the functions and functions of these three safety accessories one by one.

The function of the safety valve is that when the steam pressure in the industrial steam boiler exceeds the allowable value, the safety valve automatically opens to exhaust steam. When the pressure drops to the specified value, it will automatically shut down to prevent the boiler from exploding due to overpressure.

The pressure gauge is an instrument used to measure the steam pressure in the boiler, and the furnace workers use it to monitor the changes in the steam pressure in the boiler.

The water level gauge is a direct-reading instrument used to reflect the water level in the drum. The boiler worker monitors the changes in the water level of the drum through it.

When everyone purchases the gas boiler of their choice, a series of problems to be faced are the transportation of the boiler, installation to the factory, commissioning and subsequent normal operation. The tonnage of gas-fired boilers varies from 100 kg to more than 100 tons. We must pay more attention to the installation of the boiler. Don't cause problems in the later stage of the boiler because of the wrong installation method.

Song Gong, a technical engineer at Zhengzhou Fangkuai Boiler Plant, summarized some points that need to be paid attention to for boiler installation problems.
       ⑴. To determine the installation location, the boiler installation unit must have a boiler installation qualification certificate that meets the installation scope issued by the superior authority.
       ⑵, go through the registration procedures. According to the "Steam Boiler Safety Supervision Regulations", units using boilers should go through the registration procedures one by one. The boiler user unit should have a dedicated person responsible for boiler installation, responsible for getting in touch with the local boiler supervision agency, and filling out the installation notice.

When installing the boiler, a fireman must be involved, and a plumber, fitter, lifter, cold workman, electric welder and auxiliary workers are required.
       ⑶, organize staff to learn installation technical measures, safety technical measures, and be familiar with boiler drawings and related technical documents.
       ⑷. Before installing the boiler, check and accept the boiler body, combustion equipment, components, auxiliary machinery, and accessories according to the drawings, and make a record. If it is found that it does not meet the relevant standards, it should be submitted to the factory in time.

The installation process of gas boiler and auxiliary equipment is:
       ⑴, the boiler body, auxiliary equipment, accessory packaging boxes, and instrument packaging boxes should be hoisted according to the hoisting position specified by the manufacturer. The user shall be responsible for any damage to the hook during lifting.
       ⑵, the heavy-duty vehicle, lifting equipment, wire rope required for lashing, etc. must have sufficient load capacity, and should meet the technical specifications.
       ⑶. Before lifting, select lifting equipment according to the size and weight of large parts marked in the technical specifications, and formulate corresponding safety precautions.

Softened water treatment equipment is very useful in industrial boilers. The boiler water is softened in advance and then flows into the boiler, which can effectively reduce the probability of boiler fouling and maintain a longer service life of the boiler.

Different types of water processors use different methods, but they have a common feature, which is to soften hard water; there are many softening methods, but the most common method is ion exchange. The characteristics of ion exchanger use are: The resin is regenerated.

Everyone should pay attention to the following issues when using ion-exchange industrial boiler water softener:
       A. When the hardness of the effluent water exceeds the standard, it must be stopped and regenerated;
       B. The method of cationic resin regeneration is to soak the resin in salt water for about two hours, let the salt water dry, and then backflush with clean water to continue using it;
       C. The method of judging whether the exchanger resin is invalid (when must be regenerated) is very simple:
       Wash your hands with a piece of soap in raw water (water before treatment), and use the same method to wash your hands in the finished water after treatment. Compare the feel of the two washes. If the water is soft, the hands are very slippery, and the soap always washes. No, the processor is normal at this time and does not need to be regenerated. On the contrary, if the two feels are the same, it means that the processor has failed and can be regenerated at this time.
       D. Other types of processors can also use this method to adjust the amount of salt or other regeneration parameters.

Many people say that the tonnage of the boiler is replaced by the word "ton". In fact, this is only a simple term, and it only corresponds to a steam boiler. If it is a hot water boiler, conversion must be performed to determine the final required boiler tonnage. How big. Zhao Gong of Zhengzhou Fangkuai Boiler Factory explained the direct tonnage conversion of gas-fired steam boilers and gas-fired hot water boilers.

Take steam with zero gauge pressure as an example. The heat energy of one ton of steam produced per hour is obtained by absorbing heat in two steps in the pot. The first step is to heat one ton of feed water at 20 degrees to 100 degrees saturation. The heat energy absorbed by water is usually sensible heat, and its heat energy is 1000×(100-20)=80,000/kcal hour.

The second step is to heat one ton of saturated hot water into saturated steam to absorb the heat energy. This part of the heat is latent heat, and the heat energy is 1000×539=539,000/kcal hour.

Adding sensible heat and latent heat is the heat energy obtained by one ton of steam (when its gauge pressure is zero) in the pot,That is: 53.9+8=619,000/kcal hour. This is what we usually call the heat energy of a ton of evaporation per hour of a steam boiler, which is equivalent to the capacity of a hot water boiler of 600,000/kcal per hour.

The use of thermal insulation materials in industrial boilers can effectively reduce the heat loss of the boiler, thereby improving the overall operating efficiency of the boiler. Related tests show that compared with boilers that do not use thermal insulation materials, industrial boilers using thermal insulation materials can save at least 20% of the input cost per year, which is enough to see the importance of thermal insulation materials to industrial boilers.

At present, there are many types of insulation materials on the market, mainly rock wool, aluminum silicate fiber cotton, etc.; aluminum chlorate fiber cotton is mostly used for boiler insulation.

So, what is the appropriate range for the thickness of the insulation material used in industrial boilers? The Qiugong of Zhengzhou Fangkuai boiler manufacturer will answer for you.

The insulation thickness of the thermal insulation material selected for industrial boilers needs to be calculated. It needs to be calculated according to the internal temperature, the external surface temperature requirements or the heat loss requirements. The heat preservation of the boiler body and pipes is generally between 100mm-200mm. If you feel this calculation method is more difficult, you can remember this sentence: if the internal temperature is high, keep it thicker, and if the temperature is low, keep it thinner.

The pressureless 10-ton gas-fired hot water boiler refers to the atmospheric hot water boiler. This type of hot water boiler has a very good sales volume in our Zhengzhou Fangkuai Boiler Factory and is deeply loved by users. This is the advantage of the pressureless hot water boiler. Are inseparable. Zhengzhou Fangkuai Boiler Factory has analyzed some places where pressureless 10-ton gas-fired hot water boilers are used to help everyone judge whether this type of boiler is suitable for their own enterprises.

First of all, let's talk about the advantages of a pressureless 10-ton gas hot water boiler.

There is no danger of explosion for the boiler, and supervisory inspection is not required; there is no need to consider the pressure relief problem of the boiler room; save steel and simplify the process; scrap boilers can be reused; cancel the water supply pump; power outage protection; durable; save user investment.

Therefore, it is possible to use a pressureless 10-ton gas hot water boiler for heating and heating places with a large flow of people, such as learning heating, hotel heating and bathing, shopping mall heating, and so on.

Boiler parameters are the main indicators of boiler performance, including boiler capacity, steam pressure, steam temperature, feed water temperature, etc.

The boiler capacity can be expressed by the rated evaporation capacity or the maximum continuous evaporation capacity. The rated evaporation is the amount of steam continuously produced per unit time under the specified outlet pressure, temperature and efficiency. The maximum continuous evaporation is the maximum continuous production of steam per unit time under the specified outlet pressure and temperature.

Steam parameters include the steam pressure and temperature of the boiler, usually referring to the superheated steam pressure and temperature at the outlet of the superheater and reheater. If there is no superheater and reheater, it refers to the saturated steam pressure and temperature at the outlet of the boiler.

The feed water temperature refers to the inlet water temperature of the economizer. When there is no economizer, it refers to the inlet water temperature of the drum.

If the industrial boiler can operate safely and stably all the time, it would be great for the enterprise. There is no need to worry about property loss and casualties. However, if the quality of the industrial boiler is poor or the furnace operator does not operate properly, it will cause the boiler In the event of an explosion, the loss to the safety of property and personnel is very large, and it will also cause adverse effects on the enterprise.

This shows how important it is to maintain the safe and stable operation of industrial boilers. Zhengzhou Fangkuai Boiler Factory reminds everyone that if you want to avoid an explosion in an industrial boiler, you must first understand the cause of the explosion, so that the risk can be avoided reasonably.

The main reasons for the explosion of industrial boilers are as follows:
       1. The lack of water in the boiler reduces the overheating intensity of the drum or furnace tube, and the drum or furnace tube ruptures, and the steam or water in the furnace is quickly ejected to form an explosion.
       2. The boiler is lacking, the drum or furnace tube is overheated to burn red, and water is suddenly added to form a large amount of steam, which reduces the strength of the drum or furnace tube, and the steam or water in the furnace is quickly ejected to form an explosion.
       3. The scale in the furnace tube is thickened, the strength of the furnace tube overheating is reduced, the furnace tube is ruptured, and the steam or water in the furnace is quickly ejected to form an explosion.
       4. The quality of the boiler is defective, and the strength of the drum or furnace tube is lower than the specified value and ruptured, forming an explosion.

By understanding the causes of industrial boiler explosions, we can know which aspects should be taken to ensure the safe operation of boilers.

When the business personnel of Zhengzhou Fangkuai Boiler Factory show users our success stories or lead users to visit the factory, many users who want to purchase steam boilers will ask: What does "steamed tons" mean? Does it represent the tonnage of the boiler? This involves the professional problem of steam boilers, and our technical expert Xie Gong will answer for everyone.

In the field of thermodynamics, the steam ton itself is a non-standard unit, which represents a unit of the capacity of the heating boiler. The steam ton/hour means that 1 ton of hydration can be evaporated per hour to provide heat for water vapor heating or machine operation.

One steamed ton of medium is equivalent to containing 0.725MW of heat. In East China and North China, the heating area of ​​one steamed ton of medium is about 10,000 square meters.

The tonnage of a boiler has two meanings: one is to measure the rated output or work capacity of the boiler. The steam boiler has an hourly evaporation capacity t/h, and the hot water boiler has an hourly heating capacity, 0.7Mw=1t. Another meaning is to measure the total production capacity of a boiler plant. For example, the annual output of a certain boiler plant is XX tons. It is not measured by the number of boilers, but the rated evaporation or heat supply of all boilers produced. The sum is expressed as the total amount.

Steam boilers are mostly used in industrial sites such as chemicals and building materials. For this type of boiler, users are generally concerned about the boiler's operating efficiency, energy consumption, service life, and so on. How much steam can a steam boiler produce with 1 ton of water? A few tons of steam boiler is enough to meet the needs of users, and users must understand these data when purchasing boilers. Zhengzhou Fangkuai Boiler Factory will give you a free explanation of this knowledge of steam boilers.

If losses such as leakage and blowdown are neglected, the use of 1 ton of water in a steam boiler can produce 1 ton of steam; considering the actual situation, different boilers have water losses, and this ratio is 1-5% of the export steam.

The unit of measurement for boilers is commonly called "XX tons". There is a conversion method between hot water boilers and steam boilers. According to the measurement standard, the conversion is: 1 ton/hour (t/h) ≈ 60×104 kcal ( Kcal)/hour (kcal/h) ≈0.7 megawatt (MW).

For example, a 58MW hot water boiler is equivalent to an 80-ton steam boiler, and the boiler's flow rate is about 970 tons/hour.

Steam boiler is a pressure vessel, routine maintenance work is indispensable, mainly include:
       (1) Check the function of the water level regulator: whether it can automatically fill the water and stop the pump.
       (2) Inspection of flame monitoring.
       (3) Lubricate the rotating, sliding and cam parts and wipe them.
       (4) Flush the water level gauge 1-2 times (per shift), and operate according to the correct method until the water level gauge is rinsed.
       (5) Discharge 1-2 times (per shift).

The role of industrial boilers is reflected in all aspects, such as disinfection and sterilization in hospitals, chemical production, and so on. Various industries have demands for the use of industrial boilers. Zhengzhou Fangkuai Boiler Factory reminds everyone that if you want to ensure the stable operation of industrial boilers, routine maintenance work cannot be ignored.

Weekly maintenance work for industrial boilers:
       1) To stop the furnace at ultra-low water level, perform a furnace shutdown test (press the button on the B3 board, it should be able to simulate a water shortage and stop the furnace), or blow the sewage to check the function of the furnace at ultra-low water level.
       2) The safety valve is manually opened once and reset quickly.
       3) The burner control system and the electric eye should be checked. The photocell of the electric eye should be pulled out by hand, and the furnace should be shut down within 1s; and the electric eye should be wiped.
       4) Fill or replace the valve packing; eliminate dripping.
       5) Tighten bolts everywhere, especially the gas pipeline system, and check for leaks if necessary.

Maintenance work to be done on industrial boilers every month:
       Clean the filter on the gas line once a month.

Maintenance work to be done on industrial boilers every six months:
       1) Check the pressure gauge and clean the gauge tube, add distilled water when resetting.
       2) Maintain the water level electrode and polish it with fine sandpaper after pulling it out.
       3) Clean up the flue, generally according to the exhaust temperature to decide whether to clean up. Under normal circumstances, the exhaust gas temperature does not exceed 350°C (measured at the exit of the boiler and the entrance of the flue). Too high means that the fouling increases and the efficiency of the boiler decreases, and it must be cleaned. The purpose of cleaning the flue is on the one hand for economic considerations, on the other hand it is also for safety considerations (the smoke fouling is poor in heat conduction and prone to local burning). When cleaning and replacing asbestos gaskets, use the method of lap joints (to prevent fumes from running out), and apply graphite instead of lubricating oil.
       4) After boiler repair or annual inspection, check that the manhole, head hole, and hand hole nut are not loose, and check the rotation of the motor (from the fan end, it rotates counterclockwise).

Maintenance work to be done on the boiler each year:
       Check the safety valve once a year. Perform a comprehensive overhaul and maintenance of the boiler.

When many users are purchasing steam boilers, if they visit the boiler factory, they will find that the nameplate of many steam boilers is marked with the "t/h" logo, and there is often a number before the "t/h". Take "2t/h" for example, what does this mean? Let the after-sales engineer Zhao Gong of Zhengzhou Fangkuai Boiler Factory come to answer for you.

In a steam boiler, "t/h" is an identifier indicating the capacity of the boiler, where: t represents the unit of weight-ton; h represents the unit of time-hour.

"Boiler 2t/h" refers to the rated evaporation capacity of the steam boiler (t/h-ton/hour), that is, 2 tons of steam can be produced per hour.

The 10t/h steam boiler can evaporate 10 tons of water per hour into a steam boiler that meets the requirements.

Note: Compliance refers to the rated steam parameters specified on the chrome plate of the boiler when the boiler is designed. Generally, there are steam pressure, steam temperature, and boiler feed water temperature in addition to the boiler capacity.