When you purchase boiler equipment, you will pay attention to many problems, how much thermal efficiency, whether it is energy-saving and environmental protection, whether boiler manufacturers have special equipment installation and manufacturing certificates, etc., are the key points you need to pay attention to. At the same time, it is also important that the boiler is regularly maintained during use.

The gas boiler with regular maintenance can effectively extend the service life of the boiler, improve the working efficiency of the boiler, and reduce the incidence of failure, which is conducive to the normal and safe operation of the boiler. Gas-fired boilers that are regularly maintained have better service life, energy savings and failure rates than boilers that are not regularly maintained (especially those that have been in operation for more than one year).

Commonly used boiler maintenance methods are: pressure maintenance, wet maintenance, dry maintenance, and aeration maintenance.

First, pressure maintenance.
       Pressure maintenance is required when the furnace is not to be used for more than one week. Before the shutdown process is terminated, the steam water system is filled with water, the residual pressure is maintained at 0.05~0.1 MPa, and the temperature of the boiler water is maintained above 100 °C, which can effectively prevent air from entering the boiler.

Second, wet maintenance.
       Wet maintenance is required when the shutdown time is less than one month. Fill the boiler soda system with soft water containing lye, leaving no steam space. This is because an aqueous solution having an appropriate alkalinity forms a stable oxide film with the metal surface to prevent corrosion.

Third, dry maintenance.
       This method is used for maintenance when the furnace is stopped for a long time. The specific method is: after the furnace is shut down, the pot water is drained, the boiler is used to dry the boiler, and the residual scale and residue in the pot are removed in time, and then the tray containing the desiccant is placed in the drum and on the grate. Finally close all valves, manholes and hand hole doors. Regularly check the maintenance and replace the failed desiccant in time.

Fourth, inflatable maintenance.
       Inflatable maintenance can be used for long-term shutdown maintenance. After the boiler is shut down, do not release water, keep the water level at the high water level, take measures to deoxidize the boiler, and then isolate the pot water from the outside. After the helium or ammonia gas is introduced, the pressure after inflation is maintained at 0.2-0.3 MPa, and nitrogen and oxygen combine to form nitrogen oxide, so that the oxygen cannot be in contact with the steel plate; the ammonia is dissolved in water to make the water alkaline, and can be effective. Prevent the occurrence of oxygen corrosion.

Modular boilers refer to the connection of multiple boilers through joint control, according to the re-set heating demand curve and other parameters, and referring to the indoor and outdoor temperature difference, the system can carry out the number of boilers on/off intelligently, to realize the automatic adjustment operation mode. Modular boilers are widely used in many areas such as residential district heating and hot water supply, as well as industrial enterprise production. After two or more boilers are jointly controlled, the number of running boilers can be adjusted according to user needs. For example, if the residential building needs to adjust the supply temperature according to the seasons to adjust the number of running boilers, the industrial enterprises will adjust the number of running boilers depending on the quarterly workload and other factors.

When you purchase boiler equipment, you will pay attention to many problems, how much thermal efficiency, whether it is energy-saving and environmental protection, whether boiler manufacturers have special equipment installation and manufacturing certificates, etc., are the key points you need to pay attention to. At the same time, it is also important that the boiler is regularly maintained during use.

The gas boiler with regular maintenance can effectively extend the service life of the boiler, improve the working efficiency of the boiler, and reduce the incidence of failure, which is conducive to the normal and safe operation of the boiler. Gas-fired boilers that are regularly maintained have better service life, energy savings and failure rates than boilers that are not regularly maintained (especially those that have been in operation for more than one year).

Commonly used boiler maintenance methods are: pressure maintenance, wet maintenance, dry maintenance, and aeration maintenance.

First. pressure maintenance.
      Pressure maintenance is required when the boiler is not to be used for less than one week. Before the shutdown process is terminated, the steam water system is filled with water, the residual pressure is maintained at 0.05~0.1 MPa, and the temperature of the boiler water is maintained above 100 °C, which can effectively prevent air from entering the boiler.

Second. wet maintenance.
       Wet maintenance is required when the shutdown time is less than one month. Fill the boiler soda system with soft water containing lye, no steam space left. This is because an aqueous solution having an appropriate alkalinity forms a stable oxide film with the metal surface to prevent corrosion.

Third. dry maintenance.
       This method is used for maintenance when the boiler is stopped for a long time. The specific method is: after the boiler is shut down, the pot water is drained, the boiler is dried by left heat, and the residual scale and residue in the pot are removed in time, and then the tray containing the desiccant is placed in the drum and on the grate. Finally close all valves, manholes and hand hole doors. Regularly check the maintenance and replace the failed desiccant in time.

Fourth. aeration maintenance.
       Aeration maintenance can be used for long-term shutdown maintenance. After the boiler is shut down, do not release water, keep the water level at the high water level, take measures to deoxidize the boiler, and then isolate the pot water from the outside. After the helium or ammonia gas is introduced, the pressure after inflation is maintained at 0.2-0.3 MPa, and nitrogen and oxygen combine to form nitrogen oxide, so that the oxygen cannot be in contact with the steel plate; the ammonia is dissolved in water to make the water alkaline, and can be effective. Prevent the occurrence of oxygen corrosion.

Refer to auxiliary machine configuration, the water treatment will be placed in the first place. What is the meaning of water treatment?

Simply speaking, boiler water treatment refers to pre-softening the water flowing into the boiler and then flowing into the boiler for related use.

Natural water contains various salts. These salts are dissolved in cations and anions, mainly composed of calcium and magnesium ions, and are collectively referred to as "hard water". The minerals contained in these hard water boiled in the container and gradually form a white block or powdery solid, which is called "scale".

There are three major hazards in scale.
       1. Due to the extremely poor thermal conductivity of scale, heat absorption is reduced during heating, boiler thermal efficiency is reduced, fuel utilization is reduced, and boiler operating costs are increased.
        2. Fouling will cause the temperature of the furnace wall to increase exponentially. The stress of the steel is destroyed and the strength is reduced. In severe cases, the bursting phenomenon will occur, which will seriously reduce the service life of the boiler.
        3. The calcium and magnesium ions in the water will be integrated into the water during the heating process, which will directly affect the steam quality. At the same time, if the boiler parts such as safety valves, pressure gauges and pressure controllers are scaled, it will cause blockage.

Water treatment method.
       Boiler water treatment usually uses a combination of a resin tank and a salt tank. When the raw water containing calcium and magnesium ions passes through the resin layer of the exchanger, calcium ions and magnesium ions in the water are adsorbed by the resin while releasing sodium ions. The water that flows out of the exchanger is the demineralized water from which the hardness ions are removed. When the resin adsorbs a certain amount of calcium and magnesium ions, it must be regenerated. In the regeneration process, the resin layer is washed with a high-concentration sodium oxide solution in the salt can, and the hardness ions on the resin are replaced, and the resin is restored to the softening exchange function as the recycled waste liquid is discharged out of the tank.
         On-site practice:
       1. Check the inlet water pressure (0.2-0.4MPa); check whether the high-concentration brine in the pipe is sufficient; check whether the salt pipe and the sewage pipe are blocked; if there is any abnormality, start it after cleaning.
         2. Close the tap water bypass valve.
       3. Open the salt water inlet pipe valve and open the outlet pipe valve; open the demineralized water to the soft water tank manual and electric valve.
        4. The control valve is energized and the cycle water quantity parameter is set.
        5. start running.

Sometimes the boiler will suddenly have some conditions and face the emergency shutdown. Based on past experience, we have summarized the situation and treatment measures of boiler emergency shutdown to help you better understand the boiler.

First, emergency shutdown is required when the following conditions occur.
       1. The steam pressure exceeds the allowable safety pressure. After taking the natural gas supply, strengthening the water supply and reducing the wind, the pressure is still rising.
        2. the boiler is short of water, the water level table has not shown the water level, the water level is still not visible when the steam drum level valve is closed or the water supply is increased.
       3. The boiler is full of water and the water level has risen to the highest visible water level, but no visible water level appears after the water is released.
        4. All water level gauges or pressure gauges cannot be used normally.
        5. All safety valves and drain valves cannot be used normally.
       6. Boiler pressure parts, such as drums, furnace tubes, water wall tubes, etc., are damaged, when it is dangerous for people and equipment.
       7. The water supply equipment is faulty and there is no spare equipment.
       8. When there is a crack in the furnace wall, there will be collapse danger.
       9. The induced and forced draft fan are damaged and cannot continue to run.
       10. Other events seriously threaten the safe operation of the boiler.

Second, emergency shutdown process steps.
       1. Quickly turn off the heat treatment. First stop the burner, and close the natural gas supply valve to stop the supply of gas, then cut off the total air valve, and finally open the air valve or safety valve to exhaust steam and reduce precipitation.
       2. Rapidly cool the furnace water treatment. Do not continue to feed water into the boiler after the furnace has been shut down.
     When there is no water shortage or water leakage, the cooling time can be shortened, the cooling rate can be accelerated, and the water level can be lowered and lowered by the alternate method of water ingress and discharge.
     When the boiler is in a serious water shortage state, it is not allowed to adopt rapid cooling method. It is strictly forbidden to continue to supply water to the boiler, otherwise there is a risk of explosion.
      When the boiler is in full water state, it should weaken the combustion (the fire is considered to be changed into a small fire), open the drain valve to release the water, and open the steam trap on the main steam pipe and the sub-cylinder to prevent the steam from taking a lot of water and causing water washing.
       3. During the process of stopping the furnace, the furnace cooling rate should not be too fast, so as to prevent damage to the components such as flue, pressure parts and expansion ports due to sudden cooling.

With the elimination and transformation of large-scale coal-fired boilers, “coal to gas” and “coal to electricity” have become popular transformation methods. The electric boiler is clean, environmentally friendly and pollution-free, which helps to promote China's energy conservation and environmental protection policies, which can bring many benefits to both the country and the individual. For power consumption of electric boilers, it has become one of the most concerned issues for users. So, how can electric boilers be more energy efficient in use? FANGKUAI Boiler will share with you this knowledge.

Reasons for the large power consumption of electric boilers
       1. The house insulation effect is poor
       If the poor insulation effect of the room where the electric boiler is installed will directly lead to temperature loss, if you want to reach the predetermined temperature, you can only debug the boiler to reach a higher temperature to make up for the lost temperature, which will waste more energy.
       2. The house is much higher
    When the the house is much higher, the area of heat sharing will be larger, so that to achieve a higher indoor temperature, it is necessary to adjust to a higher indoor temperature.
       3. Unreasonable geothermal laying
      When the floor heat is laid, the insulation layer under the geothermal pipe is too thin (less than 3 cm), or the plane above the geothermal pipe is too thick (more than 5 cm). The heat does not conduct well, directly causing the loss of heat, so that the electric boiler needs to provide more heat.
       4. Electric boiler can not do intelligent regulation
      Some electric boilers are not equipped with intelligent control equipment. They need to be manually regulated during operation, and the operation steps are complicated and cannot be adjusted in time according to temperature requirements.

The electric boiler produced by FANGKUAI Boiler is mainly composed of boiler body, electric control box and intelligent control system. It can be fully automatic after power supply, and the user can adjust the running state according to the demand of temperature. The direct thermal heating tube is used in the structural design, which is convenient for replacement and maintenance.

For more information on electric boilers, you can contact the us directly via an online telephone.

Starting the burner is the first step in the normal operation of the boiler, and the burner is also one of the most important in the auxiliary equipment. In the event of a malfunction of the burner, it may cause a bad situation in which the entire boiler cannot be used. So how do you identify burner faults and eliminate them? FANGKUAI Boiler will answer your questions.

First, the ignition failure.
       If the boiler burner fails to ignite three times in succession, it is judged to be an ignition failure. The troubleshooting is as follows:
      1. If the pressure of natural gas cannot be maintained at 3-5kpa, it will not be ignited when pressure too high or too low.
      2. If the damper of the burner is too large, it may easily lead to multiple ignitions failure.
    3. When using the burner, if the ignition voltage is not ignited, or if the ignition electrode is too dirty or the position is wrong, an ignition failure will occur.
     4. When the valve is normally ignited, the valve group will be opened in time, and the opening sound can be heard. If the valve is not opened, the flame will not be generated. Therefore, if the boiler valve group fails, it will not be ignited.
     5. The ignition fault may also be caused by the ignition controller. If the ignition controller fails, it will cause normal ignition failure.

Second, the flameout failure.
       The flameout fault refers to the sudden extinguishing of the fire when the burner is in normal operation. The operation of troubleshooting is as follows:
       1. The instability of the gas source will cause the flame to fluctuate, resulting in fire extinguishing.
       2. If the flame detector is failed during operation, the flame cannot be detected normally, and the flameout may occur.
       3. the power supply is unstable or lack of equal circuit failure will also cause the flameout during operation.

FANGKUAI Boiler adopts the internationally renowned burner brand and is equipped with an automatic combustion system to achieve high-intelligence ignition. Only through the operation of the control system, various complex combustion mechanisms can be completed.

In the boiler market, the electric hot water boiler produced by FANGKUAI Boiler has been widely loved by customers because of its obvious advantages such as no pollution, no noise, simple operation, and can be used as the main heat source equipment for heating supply. Many users may encounter sudden failures such as water shortage or over-pressure in boilers when using electric hot water boilers. Understand several common faults and troubleshooting methods of electric hot water boilers, solve problems in a timely and rapid manner, and effectively avoid major losses.

1. Boiler water shortage
       Serious shortage of water in the boiler can cause deformation and damage of the pressure components. If it is handled improperly, a boiler explosion accident may occur. When it is found that the boiler is short of water, it is strictly forbidden to enter the water and take emergency shutdown measures. The causes of boiler water shortage accidents are mostly related to the slack and paralysis of the operating personnel, or to the blockage failure caused by the flushing of the water level gauge.

2. Steam and water boiling together
       When steam and water boiling occurs, the following phenomena are accompanied: the water level of the water level table fluctuates drastically, the water bubbles produced in the pot, the steam carries a large amount of water, the temperature of the steam decreases, and water shock occurs in the pipeline when it is serious. The main reasons for this kind of situation are: poor water quality, too high salt content or excessive boiler load increase. When the user discovers the phenomenon of steam-water boiling, it is necessary to strengthen the water treatment and increase the continuous sewage discharge.

3. Boiler over-pressure
       When the boiler is over-pressured, it will cause deformation of the components and damage to the joints; in severe cases, it will cause an explosion accident.
         The main reason for this kind of situation is that the boiler personnel blindly increase the working pressure or leave the job. Sometimes, the simultaneous failure of the pressure gauge and the safety valve can cause the boiler to overpressure. Therefore, it is necessary to strengthen the inspection of the responsibility system for the furnace workers and the various safety accessories.

4. Furnace tube explosion
       When the furnace tube is exploded, it is accompanied by significant blasting sound and steaming sound; at the same time, the water level and steam pressure will decrease. When this situation is discovered, emergency shutdown measures must be taken.

The general reason for this is that the poor water quality causes scaling or corrosion on the furnace tube, and water shortage and bursting may also cause each other. In addition, due to design defects, insufficient material strength or poor welding quality, it is possible to cause a pipe burst accident.

Compared with the serious environmental pollution caused by coal-fired boilers, gas boilers are gradually popularized due to their unique clean and environmentally friendly characteristics. When selecting a gas boiler, the company chooses the appropriate one according to their own needs, which is a prerequisite for the good development of the company. Then, under the same heating demand, is it better to install a single large-tonnage gas boiler or to install two small-tonnage gas boilers?

Based on the analysis of the winter climate characteristics of the Chaoyang area in Beijing, we take a single large steam boiler 10 tons/hour and two small boilers 6tons/hour as examples.

In general,the average temperature in January is the lowest, followed by December and February, and the average temperatures in November and March are higher.

First, the advantages and disadvantages of a single boiler (10tph).
1. The thermal efficiency is high (the boiler can reach more than 107%), and the heat transfer rate is fast.
2. The price is lower than the 2 sets small tonnage 6tph boiler.
3. There is a lot of fuel consumption.
4. If there is no backup boiler, once the boiler fails, the whole heating system will be paralyzed.
5. Power consumption of 10tph boiler’s auxiliary equipment (pump, water treatment, etc.) are more than of the 2sets small tonnage 6tph.

Second, the advantages and disadvantages of 2sets small boilers 6tph.
1. The number of running units can be flexibly adjusted according to the external temperature. When the weather is cold, the two units can be started at the same time. When the weather is warm, a single boiler can be activated.
2. The fuel consumption is lower.
3. Auxiliary equipment consumes less power.
4. The two boilers can be used as spares to ensure normal heating during the heating period.
5. The price of 2sets small boilers is higher than of a single large boiler.
6. The covering area of the boiler room will increase relatively.

In short, the single large-tonnage boiler and the two small-tonnage boilers mentioned above have their own advantages and disadvantages. When purchasing, the company must combine with its own actual situation, and negotiate with professional boiler engineers. After listening to the correct suggestions, the company can choose the boiler that is most suitable for enterprise development.

At present, there are many kinds of natural gas fired boilers on the market. Many users face so many types of natural gas fired boilers, they don't know much about some technical terms, and they don't know where to start.

Nominally, a fully premixed gas boiler incorporates a combustion technique called “full premixing”. Before the fuel enters the combustion chamber, it is pre-mixed with the gas (ie, air) according to the adjustment mechanism. To achieve the best combustion, the fuel utilization rate will also increase by about 10%; and it can effectively reduce the emission of harmful substances in the exhaust fumes.

Of course, for the user, fuel consumption is always one of the most concerned issues, which directly determines the input cost to the boiler. We learned from the technical engineers of FANGKUAI Boiler that the gas consumption of the fully premixed natural gas boiler and the conventional natural gas boiler are compared to help you better understand the gas boiler.

We calculate the heat required to heat 1 ton of water from 15 ° C to 50 ° C.

Requires heat: Q = 1000kg × (50 ° C - 15 ° C) × 1kcal / kg ° C = 35000kcal

Conventional gas boiler gas consumption

The current thermal efficiency of ordinary gas boilers is about 90%, and the heat of 1 cubic meter of natural gas is 8500kcal/m3.