If you know the rated working pressure of the hot full-automatic water boiler, how to determine the setting pressure range of the safety valve? If a hot water boiler knows its rated working pressure, then it is possible to determine the setting pressure range of the safety valve, which is 1.1 times the working pressure on the lower limit of the pressure value, but not less than the working pressure plus 0.07MPa. In the upper limit of the pressure range, it is 1.2 times the working pressure, but not less than the working pressure plus 0.1 MPA.
Of all the heat losses in a chamber furnace, the heat loss from exhaust smoke was the largest, at about 4% and 8%. The main factors affecting the size of Q2 are exhaust volume and exhaust temperature. Exhaust volume is large, exhaust temperature is high, exhaust heat loss is large. In general, Q _ 2 increases by about 1% when the exhaust temperature is increased by 10 ℃ and 15 ℃. Reduce the exhaust temperature, can reduce the heat loss of exhaust smoke. But it is unreasonable and impermissible to lower the exhaust temperature. In order to reduce the exhaust temperature, the heating area at the end of the boiler will be increased, which not only increases the steel consumption, but also increases the flow resistance on the exhaust side, so it is necessary to consume more energy in operation. In addition, the exhaust temperature should be kept higher in order to reduce the low temperature corrosion of the tail heated surface, especially when the fuel with high sulfur content is used. Therefore, reasonable exhaust temperature should be determined by technical and economic comparison. For modern large and medium-sized boilers, the exhaust gas temperature is usually 110 ℃ 160 ℃.
Therefore, if the use of gas-fired boilers in these demanding city, if your gas boiler emissions has not reached 30mg / m³ or less, then your gas boiler to meet environmental protection requirements, and may face the risk can not be used!
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