Boiler Knowledge

What is the difference between gas boilers and coal-fired boilers?

Both coal-fired boilers and gas-fired boilers are relatively common types in the boiler market in recent years. Although they are more consistent in their comprehensive performance, they have specific combustion methods, combustion products, and specific operational requirements and workflows. A big difference, after ample market research, Fangfeng Boiler summed up the main characteristics of coal-fired boilers and gas-fired boilers.

First, the way of burning.

Most of the coal-fired boilers use the layer-fired combustion method. The coal passes through the coal-feeding machine to transport the chain grate plane, and the combustion process is completed in the furnace. Most of the gas boilers use chamber combustion, and the natural gas is mixed with the air in the burner in a predetermined ratio, and then injected into the furnace through the nozzle to complete the combustion in the furnace state.

Second, the automatic control of the boiler.

Coal-fired boilers are limited by factors such as coal type, coal seam thickness, blast volume, air volume, air volume distribution and grate speed. It is difficult to automatically adjust boiler operating parameters according to load. However, high-quality gas boilers are less affected, and only the size of the burner can be adjusted according to the load, and automatic control is easy.

Third, the combustion products.

Coal is mainly composed of C, H, O, N and other elements, ash and moisture, but not the surface of these components, but a more complex compound. After the coal is burned, heat is released, and sulfurized oxygen gas is generated, which is discharged into the atmosphere by the flue gas. These gases are very polluting the environment and cause harm to humans. The natural gas used in gas boilers is mainly composed of methane gas and contains a small amount of non-hydrocarbon gas. Generally, it does not contain water and ash. Therefore, it mainly produces carbon dioxide and water after combustion, and releases a large amount of heat. Compared with coal, Hazardous substances should be significantly reduced.

The above is the difference between the understanding of the characteristics of coal-fired boilers and durable gas-fired boilers. We can understand that coal-fired boilers and gas-fired boilers are used in many specific ways and work contents due to different fuels. There are many differences, so in the process of choosing the two, we must choose according to the needs and convenience of operation.

2019-06-28 18:06:38

Preparations to be done before installing a natural gas boiler

With the release of various coal-fired boilers banned policies, all provinces and cities across the country have begun to carry out clean emission conversion projects for boilers. Natural gas boilers stand out among many boiler types with their unique clean and environmental advantages, and are favored by users in many industries such as food, chemical, medical, heating, construction, hotel, and paper. After purchasing a natural gas boiler, how to properly install the boiler is a worry for many users, because once the boiler is mistaken during the installation process, it will cause various unintended consequences.

Preparations for the installation of natural gas boilers are indispensable and must be carefully prepared before installation. So, what are the preparations for the installation of natural gas boilers?

First, determine the installation location of the boiler in advance.

The choice of boiler installation location should be taken to avoid these locations: poor ventilation, near flammable and explosive materials. Only when installed in a place with good ventilation and away from inflammable and explosive materials, can the boiler installation ensure peace of mind.

Second, the various installation procedures are completed in advance, and communicate with the management department.

According to the relevant regulations of the steam boiler safety supervision regulations, the unit using the boiler should be required to go through the registration procedures for the installation of natural gas boilers in accordance with the procedures before installation. The boiler user needs to communicate with the local boiler supervisory agency before installation and assign a professional to be responsible for the supervision of the installation work.

Third, contact the boiler installation related installation technicians in advance.

Installation of a natural gas boiler to install such a technical activity must be done in advance by contacting a professional and trustworthy boiler installer. And the installer must carefully understand the steps of installing the natural gas boiler and related precautions before installation. Therefore, contact the installation technicians of the boiler installation in advance before installation. Users should not start the operation by themselves.

If a worker wants to do something good, he must first sharpen his tools. The installation of natural gas boilers is also the same. Before the installation, people must pay special attention to the preparations in advance, and perfect preparation work can better complete the boiler installation work quickly and effectively. The use after installation is also more secure, and if there are any problems, you can find relevant personnel to repair in time.

2019-06-28 18:04:50

How big is the radius of damage of boiler explosion?

If the boiler is used in some bathing places, when the boiler is short of water, it will enter the water urgently, and the water will evaporate instantaneously, and the boiler will expand vigorously in a short time. If it really explodes, it may be caught by bricks and other things 20 meters away, and the damage radius is about 10 meters.

If a large industrial boiler explodes, and the boiler room is collapsed, the factory area will also have a certain extent of damage, which is an extremely serious disaster.

Nowadays, boiler explosion accidents have been rare. The more serious the boiler safety measures are, the more stringent the safety valves and fire protection devices will be. Generally, there are relatively many small boiler accidents. This is mainly because the boiler manufacturing qualification of some manufacturers of small boilers is not high, and the larger manufacturers or manufacturers with A-class boiler production qualifications are responsible for the safety of boilers. Very strict, they will strictly comply with the relevant national regulations to produce boilers that meet the standards.

The use unit of the boiler should also reasonably select the location of the boiler room in accordance with relevant regulations, so as to avoid important facilities and residential areas, prevent problems before they occur, and regularly check the operation of the boiler to check for potential safety hazards in a timely manner.

2019-06-28 18:02:11

Gas-fired hot water boiler safety operation code

People's domestic water and heating are inseparable from gas-fired hot water boilers, and due to the special nature of their performance, they must comply with strict safety practices. So, how do you need to ensure the safety of gas-fired hot water boilers?

1. Before the work, carefully check whether the water supply, drainage, gas supply pipe accessories, safety valve, pressure gauge and water level gauge of the gas hot water boiler are sensitive, and the safety can be confirmed before the work can be carried out.

2. When you are in the water, you should use both hands to operate. First open the water gate with one hand, then open the water valve of the water injector with the other hand, and the water naturally flows into the furnace. When stopping, the valve should be closed first, then the water door should be closed. When the valve is opened and closed, the face must be avoided to avoid the accident caused by the soda.

3. During the operation of the gas hot water boiler, it is necessary to pay attention to check the various parts and observe whether the pressure and water level are within the normal range. The furnace workers are not allowed to leave the post without permission. When working in night shifts, avoid sleeping and not allowing sleep, so as to avoid accidents. When the boiler is discharged, each shift must be carried out once. The water level should be properly adjusted before the discharge, which is slightly higher than the normal water level by 2/3, and then discharged.

4. The water level gauge must be flushed once per shift. When flushing, follow the prescribed procedure, first close the water valve, open the drain valve, flush the steam valve, then pay attention to whether the steam is blocked; then close the steam valve, then pay attention to whether the water is blocked. When flushing the water valve, there is water and steam, and the time is a little longer to ensure that the fake water level is not available. Hot gas water boiler fuel must be inspected for safety to prevent the presence of explosive substances in the fuel to prevent explosion hazard.

5. Always check the temperature of the mechanical equipment and the motor casing. If the machine is faulty or the motor heat exceeds 60 degrees, stop the test immediately. When the gas hot water boiler is in normal operation, the steam pressure shall not exceed the specified working pressure, and the safety valve shall be inspected once a week on average.

2019-06-28 18:01:13

Method for improving boiler thermal efficiency

The thermal efficiency is directly linked to the operating cost of the gas steam boiler. It is very important to understand the factors affecting the thermal efficiency of the boiler and to master the method of improving the thermal efficiency of the boiler.

Factors affecting boiler thermal efficiency:

First, the exhaust temperature of the furnace body. The higher the exhaust gas temperature, the lower the thermal efficiency; and vice versa.

Second, whether the fuel is completely burned. If the fuel cannot be completely burned, the boiler's thermal efficiency is also very low.

Third, the heat dissipation strength of the furnace wall. The stronger the heat dissipation of the boiler wall, the lower the thermal efficiency; and vice versa.

Fourth, the amount of scale in the furnace. The more scale, the worse the heat of the furnace and the lower the thermal efficiency.

Measures to improve boiler thermal efficiency:

First, reduce the heat loss of smoke exhaust

The temperature of the smoke is a comprehensive parameter for the design, operation and health of the boiler, and is the main reason affecting the thermal efficiency of the boiler. The exhaust gas temperature of ordinary gas boilers is around 220 °C. After calculation, the thermal efficiency will decrease by 1% for every 10 °C increase in smoke temperature.

FANGKUAI Boiler invested a lot of energy and money to reduce the heat loss of smoke exhaust. The boiler adopts advanced condensing technology to make full use of the residual heat of flue gas. The exhaust gas temperature can be reduced to about 50 °C, and the thermal efficiency is also increased to more than 107%.

Second, reduce fuel incomplete combustion heat loss

Sometimes, due to the poor heat of the furnace or the use of poor quality burners, the fuel cannot be fully burned, which reduces the thermal efficiency and requires a large amount of gas cost.

In solving this problem, FANGKUAI Boiler uses full premixed combustion technology. The natural gas and air are precisely adjusted before entering the burner to achieve the ideal state, so the fuel combustion is sufficient and uniform, and there is no need to worry about heat loss.

Third, the furnace wall heat dissipation

The problem of heat loss is unavoidable when the boiler is running. This is the physics conclusion.

We set up double-layer closed structure in the front and rear smoke boxes, more than 95% of the welding uses intelligent automatic machinery, and each layer is filled with multi-layer centrifugal glass wool for thermal insulation treatment, without ignoring every detail, to a great extent, reducing Loss of heat.

Fourth, the amount of scale in the furnace

Boiler feed water contains various impurities and calcium and magnesium ions, which will form scale when operated for a long time. The thermal conductivity of the scale is very low. When the surface is fouled by the heating surface, the thermal resistance increases, the exhaust temperature of the boiler rises, and the heat loss of the exhaust gas increases. In general, 1 mm of scale on the heated surface will increase the heat loss of the exhaust by 2%-4%.

We use high-quality soft water treatment equipment, operate the boiler feed water softening treatment device in strict accordance with the process, control the boiler feed water quality, and use the patented technology--scale online monitoring, real-time control of scale status, and regularly remind users to the boiler as a whole. Check and clean.

The above is the four methods provided by Fangfeng Boiler to improve the thermal efficiency of gas-fired boilers. You can check the boilers by referring to the above methods. If you have any problems with your boiler, please contact us immediately and our technical engineers will provide you with a solution for free.

2019-06-28 17:58:13

What are the purchase criteria for the use of gas module boilers in office buildings?

How does gas-fired boiler combine energy-saving, environmental protection and intelligence? FANGKUAI Boiler has invested considerable capital and energy, and has diligently researched and introduced a boiler unit that meets the above conditions—gas module boiler.

Gas-fired boiler means that multiple gas-fired boilers are set by the joint control system, according to the dynamic parameters such as the set heating temperature curve, and with reference to the indoor and outdoor temperature difference changes or their own demand changes, intelligently carry out the boilers that automatically judge the departure and shutdown. The number of running units can achieve near-unattended work mode and avoid waste of resources.

Concentrated office buildings When it comes to choosing thermal equipment that provides hot water and heating, gas-fired boilers are no better.

FANGKUAI Boiler has summarized several purchase criteria for gas-fired boilers, so that you can understand this type of boiler more comprehensively and make reasonable judgments based on your own needs.

First, the operating costs.
       The “module” is equivalent to splitting a single large boiler into several small boilers. The “simple parallel combination” of the quantity can realize the demand of different steaming tons. The modular design structure determines the three characteristics of the boiler.
       1. Each boiler is spared for each other. Once a single boiler has a sudden failure, other boilers can be started immediately, and the impact on heating is very small.
       2, capacity expansion is good, many office buildings in different seasons, the demand for heating and other domestic heat load will change, the choice of module boiler can solve this situation perfectly, by increasing or decreasing the number of boilers at any time, to achieve a smaller investment Meet the needs.
       3. The requirements for the infrastructure of the boiler house are not high, which can greatly reduce the capital construction investment costs.

Second, whether low nitrogen emissions.
       Many office buildings are located in the central area of ​​the city. With the stricter air pollution emission standards in China, many cities have imposed coal-free or ultra-low-nitrogen emission requirements. The gas-fired boilers produced by Fangkuo can use nitrogen-emitting emissions of as low as 18 mg/m3 by using patented technology, which meets the boiler emission standards in all regions of China.

Third, the safety index.
       The centralized office building is generally densely staffed. Once a sudden disaster occurs, the consequences are unimaginable.
       FANGKUAI boiler can be equipped with intelligent remote monitoring cloud service system for each boiler. The professional supervisors observe the operation of the fast boiler in China within the whole day. Once an emergency situation is discovered, the early warning device is remotely activated and the user is notified online. Kill the danger in the cradle.

The above is what you need to pay attention to when selecting the gas module boiler for the office building provided by Fangfeng Boiler. I hope that you can better choose the boiler suitable for your enterprise. If you have any other questions about the boiler, you can call our technical engineer's hotline directly and we will do our best to help you.

2019-06-27 18:05:31