1. The water of unqualified quality cannot enter the boiler.

2. The boiler water should be taken when the ambient temperature exceeds 5 °C, otherwise antifreeze measures should be taken.

3. If the boiler body is started for the first time after the change of the boiler body, a special person shall be set to record the indication value of each expansion indicator before and after the water supply, and analyze whether the expansion condition is in a normal state.

4. In order to prevent water running, it is necessary to monitor the header air discharge, the separator inlet pipe air release, and the economizer air door when water is being supplied. When the air door continuously rises, it should be closed in time to prevent water running.

5. In the process of water supply, the pipelines and valves of the system should be checked for leakage. If so, the water supply should be stopped and the water level of the storage tank should be observed to judge the tightness of the system. If water level drops or leaks are found, the water supply shall be stopped and the causes shall be found and eliminated.

6. Check whether the water level indication of the water storage tank is correct in time, and contact the maintenance personnel to eliminate the fault.

1. Quickly close the main steam valve to prevent the drum from losing water;

2. Turn off the main power switch and the natural gas valve;

3. Close the boiler surface drain valve to prevent other faults in the boiler;

4. Turn off the oxygen supply valve of the deaerator;

5. According to the normal shutdown sequence, check whether the boiler fuel, steam and water valves meet the requirements for shutdown.

Superheaters and reheaters are an important part of gas boilers, both of which increase steam enthalpy and thus increase boiler thermal efficiency.

The function of the superheater is to heat the saturated steam to superheated steam having a certain temperature.

The function of the reheater is to heat the exhaust gas of the high pressure cylinder of the steam turbine to a reheating temperature equal to (or close to) the temperature of the superheated steam, and then send it to the intermediate pressure cylinder and the low pressure cylinder for expansion work.

Under normal circumstances, considering the factors affecting the selection of gas heating boilers, the heating area of 10,000 square meters probably requires about 3.6MW of hot water boiler capacity, but this is the ideal situation, the conversion of 3.6MW gas hot water boiler is about equal to 5 Tons of hot water boilers. But here is a good news, 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 tonnage of the boiler, 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 even a 7-ton, 8-ton hot water boiler may be required to ensure the indoor temperature that the user wants to achieve.

Assuming that the 10 ton/hour gas hot water boiler costs 500,000 RMB when purchased, the annual depreciation of the boiler is: 500000-(500000*5%)/10 = 497500 RMB.

Assuming the residual rate is set at 5%, and it is expected to use 10 years, then the annual depreciation rate of 10 tons/hour industrial gas boiler = (1-5%)/10*100% = 9.5%.

The monthly depreciation rate of the 10 ton/hour gas hot water boiler is 9.5% ÷ 12 = 0.79%.

The monthly depreciation of the 10 ton / hour gas hot water boiler = 0.79% * 500000 = 3950 RMB= 571.5US dollars.