Recently, in Jiaxing City in Zhejiang Province Nanhu District, officially launched a comprehensive investigation and action on gas boilers and biomass boilers urban built-up areas, and actively promote the transformation of low nitrogen emission gas-fired boiler, Zhejiang Province, determined to win the Battle of the sky made own contribution.

According to the requirements of the investigation, the South Lake district towns, streets, parks within the jurisdiction of the respective gas boilers and biomass boilers urban area to take home from house to house visits Paimo way, the ecological environment Branch area combined with market regulators issuing a list a verification form inventory management. After the statistics were found in the region with gas boiler 35 units, built-up area of ​​biomass boiler Taiwan.

Meanwhile, Nanhu District will be in more than 500,000 cubic meters of natural gas consumption in the four on-site visits to enterprises as a pilot enterprise low nitrogen transformation operations boilers, ecological environment Branch area of ​​personnel, publicity reform provinces, municipalities and low nitrogen emissions on gas-fired boiler requirement that the premise of ensuring safety in production, natural gas boiler NOx emission after the transformation shall not exceed 50 mg / cubic meter, and listened carefully to the enterprise raised about the difficulties of combustion gas boiler low nitrogen transformation exists.

To speed up the investigation and major renovation large boilers, Nanhu District definite time node, before the end of 2019 business model will complete the transformation of low nitrogen gas boiler, at the same time, the city built-up area of ​​biomass boilers implement ultra-low emissions transformation. Nanhu District will adhere to routine inspections and investigation focused on the combination of concentration and control checks and unannounced visits to combine law enforcement when combined with the daily supervision and wrong, and the law enforcement inspection report from the masses combine to ensure long-term monitoring of boiler regulation implemented.

Coal fired horizontal 6 ton steam boiler factpry price design:

Coal fired steam boiler design adopt the double-cylinder, water-tube assembly, chain grate boiler. Two cylinders are laid from the lower and upper a greater level boiler longitudinally for the center. Front part of top of the cylinder and water-cooled tubes at side walls make up the radiation-heating area from the hearth. Since the rear section and tube bank within the lower cylinder function as convection-heating area, the coal economizer is mounted powering boiler. Some heat of hot combustion fume is absorbed from the hearth, then hot combustion heat flows for that convection heating area through cooling chamber and exhausts outside over the chimney via coal economizer, dust collector and draught fan.

Henan gas boiler after shutdown within 6h Why should how to do either normal cooling or emergency cooling during the first 6h gas boiler shutdown of Henan, are required to turn off all the smoke, wind and bezel door? Normal and emergency cooling Henan cooling gas boiler shutdown, in the first 6h after shutdown are identical, are required to turn off all the smoke, and air shutter door. When the difference is that the normal cooling, can be opened after shutdown 6h cited blower baffle natural ventilation, while emergency cooling, allowing 6h after shutdown and start the induced draft fan ventilation Sheung strengthening, accelerated cooling to turn on the water . The main factors restricting Henan shutdown cooling rate of gas-fired boiler, steam drum after the shutdown should not produce excessive thermal stress. Steam and water drum furnace heating and ignition boosting contrast, because external drum Henan Shutdown of the gas heat-retaining layer, the drum wall temperature drop is slower than the saturation temperature decrease rate of the steam oven and water, is an upper boiler water vapor and the lower wall of the cooling drum. Henan by gas boiler drum water wall heat transfer coefficient is large, the lower half of the drum wall temperature decreased rapidly, while the saturated steam into superheated steam at the heating drum half. Superheated steam only a very small thermal conductivity, but also because he and the steam temperature is higher than the temperature, density, and natural convection can not be saturated steam is smaller than the saturated vapor. Therefore, the heat transfer coefficient on the wall of the steam drum is small, the temperature of the upper half of the drum decreases slowly. On the drum, the lower half of bananas due to temperature difference occurs upwardly formed deformation thermal stress. When a large thermal stress is formed in the initial drum boiler shutdown Henan gas, high pressure steam drum further, the superposition of both the generated stress is large conversion. Therefore, the initial Henan gas boiler shutdown excessive thermal stress would endanger the safety of the drum. Since the size of the drum of a thermal stress, and the furnace depends on the velocity of the steam saturation temperature of water is lowered. Therefore, the most effective method of reducing thermal stress is slow drum speed drum pressure drop. Within the first 6h after shutdown, close all smoke. Wind baffle and door are the best and most simple way to prevent excessive pressure drop drum. After the gas boiler shutdown Henan 6h, due to the chimney and the furnace wall heat capacity remains the wind, cold air from the smoke, wind door, shutter and the tube through the wall, which do not leak into the furnace at a close absorb heat to become hot air It is discharged from the chimney. So, even close all the smoke, wind baffle door, drum pressure is still slowly decline. After the shutdown 6h, drum pressure has dropped to very low levels, even though the ventilation and induced draft fan started to strengthen Sheung Shui, turn on the water to accelerate cooling, thermal stress is also small drum, and the drum pressure is very low at this time due to its two translation superimposed stress were also smaller, has not pose a threat to the security of the drum.

The space layout of the boiler room must meet the requirements of installation, operation and maintenance, and it is easy to prevent moisture and corrosion, and the gas supply pipeline is convenient and safe.