FAQ With Boiler - FangKuai Boiler

1. Furnace: A value that ensures that the boiler fuel is burned out and the outlet flue gas temperature is cooled to a safe working condition on the convective heating surface.

2. Drum: The heating surfaces of the boiler are connected together and form a water circulation loop with the water cooling wall and the descending pipe. The drum is stored in soda water, which can adapt to load changes. There is a steam-water separation device inside to ensure the quality of the steam and water. The DC boiler has no drum.

3. Water wall: the main radiation heating surface of the boiler, absorb the radiant heat of the furnace, heat the working medium, protect the furnace wall and so on.

4. Combustion equipment: The fuel and the air required for combustion are sent to the furnace and the fuel is ignited and burned well.

5. Air preheater: heat the air for fuel to enhance ignition and combustion; absorb residual heat of flue gas, reduce exhaust gas temperature, and improve boiler efficiency.

6. Furnace wall: is the protective casing of the boiler, sealing and heat preservation. Heavy-duty furnace walls for small boilers can also function as support for boiler components.

7. Frame: Support and fix boiler components.

What is the composition of the natural gas steam boiler?

First. Reduce the boiler exhaust temperature
1. Increase the heating surface of the tail, that is, install a boiler economizer (or condenser) to reduce the exhaust gas temperature.
2. Arrange the exhaust gas heat recovery device at the tail of the flue to fully absorb the latent heat of the flue gas and improve the operating efficiency of the boiler.

Second. Reduce boiler condensate
The boiler heat loss from the boiler can be fully recovered by increasing the heating surface of the boiler tail or the flue gas waste heat recovery device. Increase boiler load during boiler operation, reduce the number of operating units, and minimize the situation of multiple boilers running at low load. The exhaust temperature of the boiler body is increased as much as possible to avoid the occurrence of condensed water in the boiler body as much as possible, thereby reducing the corrosion of the boiler by the condensed water and prolonging the service life of the boiler.

What measures should be taken to make gas boilers run energy-efficient?

1. Does the fuel burn completely
For an energy-saving gas boiler, the combustion of the fuel in the furnace is very sufficient and the combustion efficiency is high. When the other parameters are the same, the same amount of water is heated to a certain temperature, and the boiler with high combustion efficiency uses much less fuel than the low-efficiency gas boiler, which reduces the cost of purchasing fuel, and the energy saving effect is remarkable.

2. The temperature of the exhaust gas is high or low
For energy-saving gas boilers, the temperature of the flue gas after the fuel is burned should not be too high, and the temperature is too high, indicating that the released heat is not supplied to the water in the boiler, and the heat is discharged into the air as exhaust gas. If the temperature is too high, the thermal efficiency of the boiler will decrease and the energy saving effect will decrease.

How to judge whether the purchased gas boiler is energy-saving?

The water pressure test is a test that must be done before each boiler is delivered. This step is mainly to check the tightness and strength of the pressure components of the boiler. Once the water pressure test is detected as unqualified, the boiler will return immediately. Factory processing, can no longer continue to sell to users.

There are four main criteria for measuring the water pressure test:
       1. There are no water drops and water mist on the metal wall of the pressurized component;
       2. After the pressure drops to the working pressure, the water will not drip at the bulge;
       3. The sealing of the pot piece of the cast iron boiler is no longer dripping after falling to the rated working pressure;
       4. No obvious residual deformation was found after the hydrostatic test.

Therefore, users may wish to ask the boiler manufacturer some questions when purchasing the boiler, such as the results of the water pressure test or the state of the boiler by a professional boiler consultant. It is not too late to confirm the inspection and then sign the contract.

The above is a small suggestion from FANGKUAI Boiler, you can refer to it yourself.

Significance and measurement of boiler water pressure test

Inevitably, gas-fired hot water boilers may malfunction due to human error or the boiler itself during operation. In the event of a failure, we must deal with it in time to prevent further damage. The FANGKUAI Boiler summarizes four post-fault repair methods for both shutdown and inspection, for your reference.

First, stop the furnace.
1. Do not stop the pump immediately when the furnace is shut down. The pump must be stopped when the boiler outlet temperature is below 50 °C. At the same time, the water supply valve and the hot network return valve should be turned off, and the pot water can be discharged before inspection and repair can be carried out.

Second, check.
       1. Before entering the boiler, all the water in the boiler must be drained, and the sewage outlets are all open. The manhole on the drum, the hand hole on the header must be opened, so that the air can be convected for a period of time before entering the internal work.
       It must be noted that when someone inside the drum is working, there must be someone under the drum.
       2. Before entering the combustion chamber or working in the flue, ventilation, anti-virus, fire prevention and explosion-proof measures must be taken. The flue gates connected to the main flue or other flue of the operating boiler are closed tightly.
       3. Use a safe voltage when lighting. If the drum and the flue are damp, the lighting voltage must not exceed 12V. If it is dry, the lighting voltage must not exceed 36V. And to have proper safety measures, it is strictly forbidden to use open flame lighting.

Repair method after failure of gas hot water boiler

The boiler is a device that consumes a lot of energy, and the energy-saving device of the gas boiler is born based on this. In order to save energy, the waste heat of the high-temperature flue gas discharged from the boiler is reused. The manufacturer installs the economizer near the tail of the boiler or near the top flue, which is a component for heating the water supply. The gas boiler installed with the economizer can improve the efficiency of the boiler by lowering the exhaust gas temperature, thereby achieving the purpose of saving fuel.

Classification of energy savers:
Depending on the application and the exchange medium, the energy saver is mainly divided into flue gas-liquid boiler economizer, flue gas-air boiler economizer and all stainless steel 304 frame plus stainless steel spiral finned tube (high frequency welded pipe), which has fast heat transfer. , energy saving, durable and so on.

The energy-saving device produced by Fangfang uses a spiral finned tube structure with high heat exchange, which increases the heat exchange area by 5 times compared with the ordinary light pipe heat exchange, and the heat exchange rate is directly increased by about 5 times. It not only meets the energy-saving requirements of boiler operation, but also saves a lot of use area.

Generally speaking, the price of the energy-saving device of the gas boiler is related to various factors such as the volume of the boiler body and the expected effect. If you want to know the specific price of the energy-saving device, you need to communicate with professional technicians according to your own needs.

FANGKUAI Boiler provides a systematic complete solution for the boiler. More information can be obtained through the free hotline number 0371-55629010.

The role, type and price of gas boiler energy saver

The front tube plate of the back-combustion chamber is the most severe part of the environment in the operation of the three-return boiler. Due to the long-term interaction between high and low temperature alternating thermal stress, it is easy to cause thermal fatigue crack at the pipe end, which is the most in the three-return structure boiler. A place where problems are easy to occur.

Based on years of research experience on boilers, FANGKUAI has developed a set of specific measures to treat the cracking of the front tube sheet of the back-fired chamber, effectively reducing the risk of cracking.

1. The use of the edge-trimming ceramic tube with good temperature resistance and heat insulation effect to protect the weld seam of the front tube sheet of the back-fired chamber is not only simple in construction but also in quality.

2. Refractory cement is laid in many places at the entrance of the pipe to effectively reduce the radiation and erosion effects of the smoke.

3. The length of the pipe extension pipe is set to 3 mm long to reduce the smoke scouring effect.

4. The manufacturing process is carried out by first expanding and then welding and then re-expanding to effectively eliminate the gap between the pipe and the pipe hole.

Measures to prevent cracking of tube plate of back-fired room of hot water boiler

The membrane wall of the boiler is also called the membrane type water wall, and the tube screen is welded by the pipe and the flat steel, and then the plurality of sets of tube screens are combined to form a membrane wall.

The membrane wall is mostly used in water tube boilers, and has the advantages of simple structure, steel saving, better heat preservation and air tightness.

FANGKUAI has an advanced membrane wall production line, and the furnace adopts membrane water wall sealing technology. In the process of film wall processing, the two sides are welded at the same time, the workpiece is heated more evenly, and the deformation of the tube screen is smaller; and the turning over welding is omitted, the workload of deformation correction after welding is reduced, and the production efficiency is greatly improved. Therefore, most of the water tube boilers are completely assembled and shipped, and the transportation and installation are very simple, and the amount of installation on site is greatly reduced.

What is the “membrane wall” of the boiler?

6/8

Tel:0086-371-60922096

Frequently Asked Questions