For hot water boilers, the water pressure test is a necessary process, and the safety of the boiler can be determined through the water pressure test. So, how should the water pressure test be carried out before the hot water boiler is put into operation? Let Song Gong from Zhengzhou Fangkuai Boiler Factory tell you the answer.

First of all, the water pressure test should be carried out when the ambient temperature is higher than 5℃, otherwise anti-freezing measures must be taken. The water pressure test water should be kept higher than the surrounding dew point temperature to prevent condensation on the surface of the boiler, but it should not be too high to prevent vaporization and excessive temperature stress, generally 20 to 70 ℃.

During the water pressure test, the water pressure should rise and fall slowly. When the water pressure rises to the rated outlet pressure, the pressure rise should be suspended to check for leaks or abnormal phenomena, and then the pressure should be raised to the test pressure. The welded boiler should be kept under the test pressure for 5 minutes, and then reduced to the rated outlet pressure for inspection. The pressure should remain unchanged during the inspection.

It is necessary to judge that the qualified mark of the hot water boiler after the water pressure test is: there is no water droplets and water mist on the metal wall and welding seam of the pressure component; no water droplets drop at the expansion port after the rated water pressure is reduced; water pressure test After that, there was no visible residual deformation.

The new heating season is approaching again. At this time of the year, our Zhengzhou Fangkuai Boiler Plant can receive many inquiries from users: "Regarding the heating area of ​​xx square meters, how big a tonnage hot water boiler can meet the demand?" etc. Question, today, we take a heating area of ​​10,000 square meters as an example to briefly introduce you to choose a hot water boiler of several tons.

Under normal circumstances, the factors affecting the selection of integrated hot water heating boilers, the operating efficiency of the hot water boiler of Zhengzhou Fangkuai Boiler Factory is sufficient at 98%, and the heating area of ​​10,000 square meters needs about 0.7MW hot water boiler capacity, but This is an ideal situation. The 0.7MW gas-fired hot water boiler is equivalent to 1 ton steam boiler. The 1-ton boiler produced by Fangkuai Boiler can basically meet the heating area of ​​10,000 square meters. This is very good data. After all, the larger the boiler tonnage, the higher the boiler price. If it is in an extremely cold area and the heating building is an old building, the capacity of the gas boiler to be used will increase, and it may even require 7 tons or 8 tons of hot water boilers to ensure the indoor temperature that users want to achieve.

The hot water boiler is an indispensable equipment for heating and hot water, and the same is true for the bathroom. It is very important for enterprises to choose a hot water boiler product of suitable tonnage and model according to their own demand for hot water. Zhengzhou Fangkuai Boiler Factory will explain to everyone the hot water boiler for bathing hall with 60 shower heads that are more common recently.

The boiler is carried out in two parts of "boiler" and "furnace" at the same time. After the water enters the boiler, the heating surface of the boiler in the steam-water system transfers the absorbed heat to the water, so that the water is heated to a certain temperature and pressure of hot water or steam, which is led out application. In the combustion equipment part, the combustion of the fuel continuously releases heat, and the high-temperature flue gas produced by the combustion transfers the heat to the heating surface of the boiler through the heat transmission, and the temperature of itself is gradually reduced, and finally discharged by the chimney.

First of all, there are several types of hot water boilers according to different fuels: coal, gas, oil, firewood, biomass, and electricity. According to your usage, is it possible to concentrate on bathing during a certain period of time? How many people will take a bath continuously? If they are concentrated from 7 to 9 in the evening, consider using a 70,000 kcal oil-fired hot water boiler. The model is WNS0.7-95/70-YQ, and then make a 2 ton stainless steel heat preservation water tank, so that it will start to boil water at one o'clock every afternoon and the water in the water tank will be heated to more than 70 degrees through the water pump cycle. Ensure the hot water supply at night, fully automatic operation without human care, suitable for use in small bathhouses, pay attention to the oil quality used, otherwise the high failure rate will affect normal business. When the whole set comes down, the boiler is a little more than 10,000 yuan, two circulating water pumps are 1,000 yuan, and the water tank is more than 2,000. The water tank can be used to discharge water by gravity on the roof, saving an outlet pump.

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.