hot sale industrial steam boiler for rice mill

Boilers are our life's products, and gas-fired boilers are energy-saving and emission-reducing products, which are loved by very customers, but in the use of gas-fired boilers, due to the problem of water quality, the boiler will be covered with scale. What is the effect of the scale on the boiler? The formation of boiler scale after a long period of operation, the inevitable occurrence of scale, corrosion problem, the main reason for boiler scale formation is that the water has a hardness component, after the high temperature, high pressure evaporation concentration, the main reason for the boiler scale formation is that the water has a hardness component, after the high temperature, high pressure evaporation concentration, A series of physical and chemical reactions take place in the furnace, eventually forming a hard, dense scale on the heated surface. Harm to gas-fired boiler 1 The heat transfer effect is reduced and the corrosion factor under the scale is 2, which results in the decrease of boiler water wall furnace heat absorption, the increase of boiler outlet temperature, the increase of boiler loss 3, and the reduction of heat transfer effect after scaling in the water wall. It may lead to the increase of the wall temperature of the water wall and the explosion of the tube wall of the water wall, which will affect the safe operation of the boiler. Scale is the first harmful factor of boiler, and the main cause of boiler accident. Its harmfulness is mainly manifested in the waste of a large amount of fuel: because the thermal conductivity of scale is only a fraction of that of steel, the heat transfer will be blocked after scaling on the heated surface. In order to maintain a certain output of the boiler, it is necessary to raise the temperature on the side of the fire, thus Causes external radiation and exhaust smoke to cause heat loss. Boiler cleaning gas-fired boiler can use high-efficiency environmentally friendly non-corrosive cleaning agent to clean gas-fired boiler, cleaning agent to clean the scale completely dissolved, so that the equipment tube exposed metal primary color, reduce the effect of scaling and biological algae sludge. At the same time, it can peel off iron oxide and ferrous oxide, prolong the service life of gas-fired boiler and reduce energy consumption.

Boiler and steam conditions What? 1) normal boiler plant, combustion stability. 2 vapor pressure) and steam the furnace tube is slightly lower than the vapor pressure of main steam 1 to 2 psig pressure in the boiler; Table 2-3 high pressure boiler. This is to avoid excessive pressure is not very stable Ambassador temperature steam into the oven from the start a lot of steam main pipe, causing the steam with water, boiler water level impact and instability. 3) steam temperature and steam oven should be slightly rating, and specific values ​​should be considered equipment conditions. This is to avoid over-temperature and rapid decrease due to the steam or steam temperature steam main pipe and the furnace for the force with water (4) drum water level is maintained low level. This is because in order to avoid contact with the steam and the water level rises over the water load (5) steam quality (including Na +, or the amount of salt content) qualified. This is to avoid vapor and steam oven failed to affect the quality of the mother pipe steam quality.

Recently, Taiyuan, Shanxi Province Environmental Protection Leading Group issued a circular on promoting the transformation of ultra-low emissions and low nitrogen transformation of biomass boilers gas-fired boiler. Resolutely implement - the latest requirements "2018 in Beijing, Tianjin and the surrounding areas in 2019 autumn and winter tackling air pollution comprehensive management action plan" in, and further reduces boiler emissions standards.

1, 2019 until October 31, the use of boiler tail decoration efficient dust removal, desulfurization, stock device is accomplished ultra-low emission biomass boilers transformation of the necessary funds by the counties (cities, districts) and users together to solve, not the municipal finance I grant.

2, October 31, 2019 update for ultra-low emissions of nitrogen gas boilers, electric boilers biomass boilers, municipal finance one-time grant 30 yuan / square meter construction costs, in part by the lack of counties (cities, districts) and user common solutions.

Way: by transformation to replace the low NOx combustion, a flue gas recirculation device installation mode, NOx emission is less than 30 mg / m item.

NOx emission cuts ≥50%, and the concentration value of less than 30 mg / cubic meter project, to give up prize money of 30% in accordance with the transformation of investment.

3, after December 31, 2017 the new gas boiler, should meet the emission requirements on Taiyuan low NOx combustion, but does not enjoy the low NOx combustion subsidies.

Note that the fine and coarse phase modulation in conjunction with the case of large amplitude operating parameters should be used quickly and overshooting regulating manner, so that the parameters can be changed quickly change trend, i.e. coarse. Especially when handling accident, to adjust the water level, particular attention should be. Case of an accident, such as load rejection boiler fire, etc., then the water level change is very large, and due to the influence of false water level changes very fast, requires operators responsive, and regulating. And if the mother controls the water supply system, several furnace influence each other, plus the usual low water pressure, in case of an accident, water level changes several furnaces at the same time, grab the water is serious, and therefore should be coordinated in the coarse, exchanges. Avoid artificially adjusting improper expansion of the accident. E.g. turbine load rejection while regulating the boiler water level because of improper fire; level adjustment because of improper fire the boiler is full of water; even when a boiler trip lower blower speed to the powder duct blockage caused by excessive and so on. After coarse, then stabilized when the parameter using fine control parameters for fine tuning the slow stabilized manner. For regulating steam pressure, excessive use of increased heat loss adjustment expense adjustment method, especially in powder machine speed does not fluctuate up and down sharply, oxygen fluctuate, causing the furnace combustion conditions whom are also changed, At this part of the unburned fuel losses increased significantly, a great influence on the thermal efficiency of the unit. Therefore to avoid this mode of operation, in a combustion automatically respond is monitored for fluctuations powder speed, found that excessive volatility, should be lifted automatically run, to intervene manually, artificial fine, in order to improve the thermal efficiency of the unit time.

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