According to statistics, Zhejiang Province, coal consumption totaled 145.91 million tons, accounting for 56.8% of primary energy consumption in the province. Although after careful environmental management, but the main coal-dominated energy consumption remains high in the province's total emissions of air pollutants. In the "Zhejiang Air Pollution Control Action Plan (2013-2017)" issued in December 2013, the coal-fired pollution control remains a top priority.

According to "Zhejiang low-carbon development" Thirteen Five "plan", as of 2020, the province's proportion of non-fossil energy sources will be increased to about 20%, the proportion of the total coal consumption should be reduced to around 42%.

June 15 this year, Hangzhou Iron and Steel Group ironworks blast furnace in the chimney successful blasting, declared the "three noes" no way to urban development of Hangzhou steel companies, no coal-fired generating units, there is no standard yellow car.

To control pollution from coal-fired source, Zhejiang Province, facing elimination from the transformation of the boiler parties policy, funding, pricing, comprehensive resources supporting the work in 2015, 2016, 2017 were given every right out of steam coal-fired boilers tons 15,000 yuan, 12,000 yuan and 10,000 yuan subsidy funds.

To eliminate 10 tons of steam / hour of coal-fired boilers, in October 2014, Zhuji City, party and government "leaders" personally took, within three months, through the introduction of reward and subsidy standards, regular assessment and other measures, the city's 1964 stage production behind coal-fired boiler demolition 1508 units, 390 units to natural gas or electricity, and the rest use biomass fuel, gas tank or centralized heating, completed the task of transformation. It is estimated that, this year more than 500 tons of sulfur dioxide emissions.

After a clear goal, the province's coal-fired boiler (kiln) transformation to accelerate out of the furnace. According to statistics, in the first half of this year, Zhejiang Province eliminate small coal-fired boilers 6200 Taiwan, has completed 77.5% of the annual task of eliminating.

Note industrial gas medium pressure water tube boiler for brewery safe operation: industrial gas boiler is heavy industry, chemical industry, military industry, light industry and other equipment manufacturing companies have to use a lot of, it can provide sufficient energy for the production of enterprises, so as to ensure the orderly conduct production work .

1 Ton Gas Fired Steam Boiler Efficiency Calculation

It is a well known fact that the initial cost of boiler is a small part of total costs associated with the boiler over its lifetime. In the operational life of a boiler, major costs arise out of the fuel costs. Ensuring efficient operation of boiler is critical to optimize the fuel costs. Now, let me tell you how to calculate a 1 ton gas fired steam boiler efficiency.

Use of natural gas medium pressure water tube boiler for brewery, so what can energy-saving? Natural gas boiler. Effective heat value but its low calorific value of about 8500 kcal / cubic its high calorific value of up to 10,000 calories, the extra part in burning Nao process becomes superheated steam with the flue gas discharged out, the exhaust gas temperature can reach about 220 degrees to install a waste heat recovery tube in the flue gas outlet of the column, heated with hot flue gas is pumped into the preparation boiler water, you can save gas more than 5% ,, Thus, in terms of low calorific value of the thermal efficiency of the boiler can be 88% to 92% to 98% to 102% 1, to improve the conditions of the air flow encounters improved gas boiler gas and air two streams communicating condition, and an object thereof is to increase the contact area. The greater the contact area, the greater is the reaction area, strengthen the burning. Specific measures may be air and the gas stream into small strands, so that the two streams meet and intersect with a certain velocity; cell stream of gas (generally a gas) passes through and submerged in another stream of air, and the like. 2, enhance mixing, scrambling combustion gas boilers burning gaseous fuel is a single-phase reaction, ignition and combustion of solid fuels easily than, but the rate and extent of complete combustion is mixed with the combustion gas and air quality are closely related. Better mix, burn more rapidly and completely, the flame is short. Therefore, as long as the stability of the flame is not destroyed, it should enhance airflow velocity gas stream in the combustion chamber outlet or even a baffle at the inlet of a large resistance and the like obstacles, let hitting, red flame, increase turbulence in the airflow to strengthen the mix. 3, preheated air and gas to increase the temperature of gas and air, can be enhanced combustion reaction. It should therefore be preheated using waste heat of exhaust gas and air temperature, thereby increasing the combustion temperature and the flame propagation velocity of the combustion process to be strengthened. 4, rotation of the rotating stream and the recycle gas stream causes turbulence and mixing can be enhanced. Meanwhile, in the center of the rotation will form a reflux stream of large gas back area of ​​the boot cycle, both to strengthen the mixing, also extended the flue gas flow path and residence time within the gas boiler and reduces loss of incomplete combustion. 5, flue gas recirculation in order to improve the combustion gas temperature of the reaction zone of the boiler, the flue gas may be directed to a portion of the high-temperature combustion data, so that the end of the fuel mixed with the burning or combustible mixture, in order to improve the combustion intensity. But take note that the amount of flue gas recirculation should not be too large, otherwise it will dilute the combustible mixture and the hook due to excessive inert substance, but slows down the combustion, pyrolysis and even anoxia, resulting in loss of incomplete combustion gas boiler.