Industry News

The boiler sewage discharge is a boiler water contaminated by salt and residue in the boiler.

Operation procedure

1. Before discharge, ensure that discharge is carried out under the premise of high water level and low load.

2. First open the blowdown valve in front of the furnace, and then slowly open the blowdown valve in back of the furnace. Remember to open this step slowly, the purpose is to warm the pipe (especially in winter operation), the second is to prevent sudden opening, accidents (such as connecting gasket leakage caused by accidents).

3. Slowly open the blowdown valve after the furnace to fully open, and then close the valve, open the blowdown valve after the furnace again, and then close, repeat this operation two to three times (generally three times), open the valve time control in 2~3 seconds. Finally, close the blowdown valve in front of the furnace.

4. Carry out the above operations on the same sewage discharge.

5. After the completion of the overall blowdown work, the boiler liquid level should be reduced by 20~30cm

Gas oil steam boiler with pressure, belongs to special equipment, whether the boiler operation or inspection and maintenance, we should pay attention to. What checks need to be done before restarting the boiler? Today we will explain in detail:

1.Pressure gauge, level gauge

Check whether there is any abnormality, the installation of bend pipe and connecting pipe and the opening and closing of intermediate valve. Whether the level indicator shows the correct water level, whether the drain valve status of the level gauge column is correct, and whether the pressure gauge has a legal inspection mark within the term.

2. Safety valve, release valve, release pipe

Check whether the opening pressure has been adjusted to the specified opening pressure and whether the drainage pipe is properly installed. Check whether the drain pipe is blocked and whether there are any preventive measures.

3. Sewage discharge device
Check whether the opening and closing of the blowdown valve is flexible, and whether the lining of the packing cover has enough room for adjustment. Check whether the blowdown pipe is abnormal.

4. Steam valve

Check their opening and closing status for abnormalities

5. Air valve

After hydrostatic test to full water state, starting point furnace until steam, must be kept open

6. Boiler pipeline

Check whether the connection, drainage and insulation of steam pipe and water pipe meet the requirements. After scaling the boiler will overheat, creep, deformation, bulging, serious overheating tube burst.

There are many kinds of fuels used in boilers, and different fuels differ in calorific value, cost, etc., so what are the main types of oil gas fired boilers?

Divided by fuel:
1. Gas-fired boiler: gas, liquefied gas, biogas, city gas and other gases as fuel; 2. Oil-fired boiler: light oil, heavy oil and so on are used as fuel; 

Divided by medium:
1) Steam boiler: widely used in industries that need steam to provide heat sources, such as food, chemical, building materials, bags
Clothing, medicine, textile and other industries.

2) Hot water boiler: widely used in residential, residential, schools, hotels, flowers and vegetables greenhouses heating, bathing, domestic water, etc.

Divided by appearance:
Vertical oil-fired gas boiler (this kind of boiler capacity and footprint is relatively small, so it is more flexible); Horizontal oil-fired gas boiler (This kind of boiler is relatively large in capacity and appearance, and occupies a large space).

Attention of gas boiler commissioning:
1. Pay attention to fuel
Before the boiler is used, check whether the gas meets the prescribed requirements, and ensure that the gas supply pipeline, valve and other unimpeded and no leakage occurs.

2. Pay attention to water supply
Boiler water supply system is complete and normal, meet the boiler water standards and quality, need to do a good job of water quality monitoring.

3. Pay attention to the control system
Gas boiler adopts PLC control system, check the indicator light, touch the button to start and stop and so on is in normal state.

4. Arrange debugging personnel reasonably and check all kinds of tools required for debugging work. Check inside and outside after debugging to prevent tool parts from falling down.

According to the form of boiler and combustion mode, there are:
1. Placement mode: horizontal W, vertical L, horizontal H;
2. Combustion position: internal combustion N, external combustion W (Note: chamber combustion furnace S);
3. Number of POTS: single drum D, double drum S;
4. Whether atmospheric pressure: atmospheric pressure C;
5. Combustion chamber structure: water pipe S, fire pipe H;
6. Grate mode: Fixed grate G, fixed double grate C, movable hand grate H, chain grate L, reciprocating grate W;
7. Fuel type: Y (oil), Q (gas);

Among them, W represents horizontal or external combustion or reciprocating grate; L stands for vertical or chain grate; S stands for chamber burner or double drum or water pipe; C means atmospheric or fixed double grate
In addition: LDR, WDR type respectively stand for vertical and horizontal electric heating boiler, R stands for hot water, but not for hot water boiler, LDR, WDR type also have electric heating steam boiler.

For example: WNS2-1.0-Q, divided into WNS series, rated evaporation of 2 tons, rated working pressure of 1.0Mpa, Q gas.

Boiler type code naming is not complicated, but sometimes easy to confuse its meaning. When you are buying a boiler and you do not understand, we suggest asking the boiler manufacturer.

Starting burner is the first step of normal operation of boiler, burner is also one of the most important auxiliary engines of gas boiler. The boiler may also fail to start if the burner fails. So, how to identify and eliminate burner failure? Xinda Boiler for your answer.

Ignition Fault

If the boiler burner fails to ignite after three consecutive starts, it is judged to be ignition fault. The troubleshooting operations are as follows:
1, if the pressure of natural gas can not be maintained at 3-5kpa, too high or too low will appear the phenomenon of non-ignition.
2. The damper of the burner is too large
3, when using the burner, the ignition voltage device does not ignite, or the ignition electrode is too dirty or wrong position
4. The boiler valve set fails
5. Ignition controller fails

Flameout Fault

It refers to the sudden fire extinguishing during the normal operation of the burner. Troubleshooting operations are as follows:
1. Unstable air source
2, if the boiler is running, the flame detector is faulty, can not normally detect the flame, there will be flameout.
3, power supply instability or lack of equal circuit fault

Xinda boiler adopts Italian imported combustion machine, and collocation of automatic combustion system, to achieve high intelligent ignition, only through the operation of the control system, you can complete the complex combustion mechanism.

Steam generator is a mechanical equipment that uses the heat energy of fuel or other energy to heat water into hot water or steam. It belongs to small equipment and is also a kind of steam boiler. Its water volume is less than 30 liters, which belongs to the steam boiler exempt from inspection. According to the regulations of Boiler Safety Technical Supervision, the water volume is less than 30 liters, which is not within the scope of boiler supervision.

Steam boiler is through the combustion of fuel to release heat energy, and through the heat transfer process, the heat transfer water, so that the water has a certain temperature and pressure of steam heat exchange equipment, widely used in the production of factories and enterprises. It belongs to special equipment, high requirements for enterprise qualification, product safety, and the need for annual inspection.

The difference between a steam generator and a boiler in a nutshell is that a steam boiler contains a steam generator, but a steam generator is not a steam boiler.

Generally speaking, the rated thermal efficiency of 1 ton boiler is 0.7MW (700KW), 0.7mw heating area is regional differences, heating 50~70W/㎡, 1 ton hot water boiler heating area is generally 6000~10000 ㎡. Now some areas also stipulate heating 32W /㎡, 32W can be nearly 15,000㎡, the specific design should leave a margin.

Conversion formula: 600,000 kcal/h ≈1ton/h≈0.7MW

Advantages of  hot water boilers: This type of boiler achieves the advantages of full combustion, no pollution, convenient operation, and convenient installation; this type of boiler has high thermal efficiency, large output, strong load adaptability, high degree of automation, convenient operation, safe and reliable operation, and is high-efficiency, low-consumption, low-pollution green products.

The tonnage conversion between gas steam boilers and gas hot water boilers. Many users do not know well, and they use the term “ton” uniformly. In fact, for hot water boilers, “MW” should be used to indicate that the tonnage and model should be more appropriate.

The power of the hot water boiler is MW, 1T = 0.7MW = 720kW = 600,000 kcal

The consumption of boilers per hour is the focus of many users’ attention, which is related to the cost of the user unit for the boiler. Generally speaking, the measurement of boiler consumption is mainly depending on the operating efficiency. The higher the operating efficiency of the boiler, the lower the consumption, and the less cost. Henan Xinda’s gas boiler operating efficiency is generally more than 98%. For example, 1 ton of gas boilers consumes about 70 cubic meters per hour. It is a very low gas consumption cost in the entire boiler market.

After a period of operation of the gas boiler, the equipment and auxiliary machinery of the boiler will produce wear, leakage, corrosion or other damage reasons. If it is not maintained or repaired in time, the safe operation of the gas boiler will become a big hidden danger. So today we want to understand how to do daily maintenance and maintenance of gas boilers, to ensure the original performance of the boiler and the service life of the boiler.

Boiler cleaning: there will be some residue in the boiler combustion chamber, which needs to be cleaned inside the boiler and its gas pipeline.

Boiler anti-freezing: in cold winter, the temperature is below 0 degrees in the area need to take anti-freezing measures on the boiler: if the boiler room is outside, then the indoor temperature is reduced to 15-18 degrees, let the boiler run all day; If the room is unoccupied for a long time, the boiler needs to be drained.

Boiler sewage: Because the flue gas and flue gas temperature is too low, there is water, remove this part of the water from the chimney, and part of the chimney wall absorbed, the rest of the water deposited at the bottom of the chimney, the purpose of regular blowdown is to remove the sediment in the furnace, adjust the quality of the furnace water.