1, high-pressure steam boiler for brewing plant overpressure failure phenomenon occurs.
Failure performance; and a sharp rise in air pressure than the rated working pressure of the license, pressure gauge pointer significantly exceeds the red line area of security, even after the safety valve still can not stop the rise in air pressure abnormality.
An overview of how the steam-gas boiler gas steam boiler for brewing plant: heat, water heated pot steam boiler with natural gas, liquefied petroleum gas, fuel gas such as city gas as fuel, the combustion in the furnace is released and allowed to vaporize into steam thermal energy conversion device. Water pan (drum) is continuously released from the combustion of a gaseous fuel energy to heat the furnace temperature is increased and produce steam under pressure. Since the boiling point of water increases with increased pressure, the pot is sealed, the expansion of water vapor generated inside the pressure limited thermodynamic formed, strictly speaking, the steam boiler is heated in water at constant pressure saturated steam drum regasification water formed, is widely used as an energy source.
Recently, Yuhang District, Hangzhou, Zhejiang Province, a printing company 20 steam tons / hour of coal-fired boilers have been stalled, this is the last Yuhang district an industrial coal-fired boilers, which marks the shutting down of Yuhang District of industrial enterprises to bid farewell to coal energy structure of coal turned to natural gas and other clean energy, Yuhang District from entering the industrial coal-free era.
Yuhang District "coal-free zone" construction of road resistance and long. As a major industrial zone, a long time, Yuhang District to focus on coal-fired thermal power plants, coal-fired boilers and other industrial enterprises formed a coal-dominated energy consumption structure. In 2014, the maximum amount of coal Yuhang District reached 783,600 tons. Large coal consumption that emissions of sulfur dioxide, dust and the like remain high for many years.
In order to further deepen the air pollution control, to win the Battle of the blue sky, Yuhang District, from 2017, will gradually tangqi thermoelectric, thermoelectric and sea Chongxian three coal-fired thermoelectric power plant with all closed down, the sea of clean natural gas for thermoelectric realized heat. 3 thermal power plant shut down so that the region's coal consumption, pollutant emissions and other indicators to achieve substantial reductions in road construction of "coal-free zone" has taken a crucial step.
Yuhang bid farewell to coal road this did not stop. While coal-fired thermoelectric accounted for the bulk of coal consumption and pollution emissions, but only out of coal-fired power plant is not enough. 2018, the government decided to promote taking advantage of Yuhang District, the region within the remaining four coal-fired industrial enterprises (Coal Products) pot (kiln) furnace closed down or eliminated or modified.
Yuhang District to increase the proportion of electricity consumption, and actively guide the region's energy unit of coal to electricity, oil to electricity, gas bottle to electricity, the construction of an orderly distribution grid, promoting smart grid construction; continue to improve the level of utilization of natural gas, and urban area in addition to all the town cormorant birds, Baizhang full realization of natural gas supply, a total of 850 kilometers of natural gas pipeline construction and municipal gas transformation 45000; to promote the application of photovoltaic power generation, the region's industrial and commercial enterprises amounted to 173 megawatts of photovoltaic capacity building distributed, clean energy applications has taken shape in Yuhang District.
According to statistics, "Thirteen Five Year Plan" (2016-2020) since the implementation of environmental statistics included in Yuhang district industrial enterprises coal consumption from 588,900 tons in 2016 down to 38,900 tons in 2018, to drop in early 2019 0.
A substantial decline in coal consumption is brought to slash emissions of pollutants and air quality improved significantly. 2018, the main pollutant urban air Linping PM2.5 average concentration of 38 micrograms / cubic meter, decreased 40% in 2015. Region sulfur dioxide emissions of 7,833 tons in 2014 to 2018 had dropped more than 90%; NOx emissions to 8490 tons in 2014 to 2018 had dropped more than 60%.
Steam boiler safety valve Di installation and adjustment of safety valves for steam boiler for brewing plants, the importance of self-evident purpose is to protect the safe operation of steam boilers Di, when the medium pressure in the steam boiler or pipe rises, exceeds the specified value automatically open, steam boiler safety shutdown. Safety valve so important, then for Di install it, what should What precautions do, the author based on years of experience, special summarized below. A safety valve safety valve should be installed after Di hydrostatic test boiler installation is complete, should be adjusted safety valve operating pressure during the initial Stoke. Adjusted in accordance with the National Labor Safety Technical Supervision Regulation Administration steam boiler 143 Table 7-2 a predetermined pressure. Second, adjusting the opening of the safety valve remove the pin, removing the top cover, loosen the hexagon nuts and screwing the adjustment screw, to relax or tighten the spring to achieve the required exhaust pressure relief valve. After adjusting tighten the lock nut, and then the remaining parts installed properly. When the valve reaches the predetermined setting pressure should seal, valve unless verify, at any other time does not allow unauthorized disassembly seals. First, when adjusting the safety valve, the water level in the drum should be slightly lower than normal water levels, and water ready at any time after the safety valve can open. Secondly, do not striking any part of the safety valve, the safety valve can only open the lever on the valve. Finally, in the former boiler safety valve is not adjusted absolutely prohibited.Free Chat
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