According to the different steam output status of the steam boiler, the steam boiler is divided into saturated steam and superheated steam. The boiler equipment selected by users under different needs is also different. If you want to choose a suitable boiler model, you must first have an understanding of these two types of boilers.

First of all, the saturated steam boiler refers to: when water is heated to boiling under a certain pressure, the water begins to vaporize and gradually becomes steam. At this time, the temperature of the steam is equal to the saturation temperature. The steam in this state is called Saturated Vapor.

Water under a certain pressure corresponds to a saturation temperature. This temperature is related to the pressure. The higher the pressure, the higher the saturation temperature; on the contrary, the lower the pressure, the lower the saturation temperature. For example, when the pressure is 0.10MPa (1atm), its saturation temperature is 99.09°C; when the pressure is 4.05MPa (40atm), its saturation temperature is 249.18°C; when the pressure is 10.13MPa (100atm), its saturation temperature is 309.53°C .

The superheated steam boiler means that if the saturated steam continues to be heated, its temperature will rise and exceed the saturation temperature under the pressure. This kind of steam exceeding the saturation temperature is called superheated steam.

Therefore, when selecting steam boilers, you may wish to have a certain understanding of the steam temperature you need, so that you can quickly and accurately screen out a steam boiler that is really suitable for you.

Steam boilers and hot water boilers are two different types of boilers. The former outputs high-temperature steam and the latter outputs high-temperature hot water. The user groups and uses are also different. When our Zhengzhou Fangkuai boiler manufacturer was docking with many users, we received feedback from users: The hot water boiler used before is no longer needed, can it be directly changed to a steam boiler to continue using it.

Here, Song Gong, the boiler technical engineer of the Zhengzhou Fangkuai boiler manufacturer, solemnly responded to everyone that this is not allowed, and it is very dangerous for the operation of the boiler and the users themselves.

First of all, the safety and technical specifications of hot water boilers and steam boilers are different, and the design and manufacturing standards are different. If the hot water boiler is changed to a steam boiler without authorization, it is easy to cause poor operation of the boiler, thereby harming it. To the operating effect of the boiler.

In addition, the structures of hot water boilers and steam boilers are different. If they have to be changed, many parts will be subjected to different pressures, which will also harm each part of the boiler.

Therefore, everyone should pay attention not to change the hot water boiler and steam boiler without authorization. If your boiler does not want to be used, you can sell it as a second-hand boiler and save part of the input cost.

Depending on the medium, gas boilers can output high-temperature steam or high-temperature hot water, but the same thing is that all boilers use gas fuel as the main fuel. In this way, the safe operation of the boiler is involved. The after-sales service engineer of the Zhengzhou Fangkuai boiler manufacturer deliberately summarized the implementation standards for the safe operation of gas boilers, hoping to help everyone.

First of all, all personnel operating boilers must be familiar with the performance of the boiler they operate and relevant safety knowledge, and hold a certificate to work; non-personnel are strictly prohibited to operate. The personnel on duty shall strictly follow the regulations and carefully prepare the operation records and shift records. The shift shall clarify the safety conditions of equipment and operations. Check whether the boiler is in good condition during the shift.

It is necessary to ensure that the boiler and safety accessories shall be qualified and within the validity period.

Preparation work before starting gas boiler:
       ① Check whether the gas pressure of the gas stove is normal, not too high or too low, and open the oil and gas supply throttle;
       ② Check whether the water pump is filled with water, otherwise open the air release valve until the pump is filled with water. Open each section of the water supply system (including the front and back of the pump and the water supply section of the boiler);
       ③ Check the water level gauge, the water level should be in the normal position, the water level gauge and the water level color plug should be in the open position to prevent false water level, if there is water shortage, the water can be filled manually;
       ④ Check the valves on the pressure pipes, they must be opened, and all the wind deflectors on the flue must be opened; ⑤ Check that each knob on the control cabinet is in the normal position;
       ⑥ Check that the outlet valve of the steam boiler should be closed, and the outlet valve of the circulating water pump of the hot water boiler should also be closed;
       ⑦ Check whether the water softening equipment is operating normally and whether the various indexes of the soft water produced meet the national standards.

Start-up work of gas boiler:
       ① Turn on the main power supply;
       ② Start the burner;
       ③ The air release valve on the drum is closed when all steam is coming out;
       ④ Check boiler manholes, hand-hole flanges and valves, and tighten the leaks. If there is leakage after tightening, stop the furnace for maintenance.

Gas boilers are divided into gas-fired hot water boilers and gas-fired steam boilers. Depending on the output medium, the two are also used in different industries. After we purchase the gas boiler, it may not be operated 24 hours a day, 365 days a year. The boiler may be temporarily shut down due to the construction period or other aspects. The Zhengzhou Fangkuai boiler manufacturer summarized the shutdown treatment of the two types of gas boilers, hoping to help everyone's boiler equipment to run more durable.

1. Normal shutdown operation of gas hot water boiler:
       ①Turn the "Load high fire/small fire" nob to "Small fire";
       ②Turn off the burner;
       ③ Close the fuel supply valve;
       ④ Closed flue baffle;
       ⑤ After the boiler outlet water temperature drops to 50℃, close the outlet valve of the circulating pump;
       ⑥ Stop the circulating pump.

2. Emergency shutdown operation of gas hot water boiler:
       ①Close the inlet and outlet valves of the boiler;
       ②Open the emergency discharge valve and emergency water supply valve;
       ③Turn off the main power switch;
       ④Notify superiors.

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.