Leshan City, Sichuan Province issued a notice "Leshan City to win the Battle of the blue sky plan", the program made specific control measures and methods for the quality of atmospheric environment, as follows.

1, and strictly control the total coal consumption. Timely expansion of high-pollution fuel combustion zone ban scoping, year by year break down total coal consumption reduction targets. In 2020, the city's total coal consumption is not more than 7.075 million tons, accounting for primary energy consumption fell to below 30%. Strict control of new construction, renovation, expansion of coal projects, new coal project implementation year coal consumption reductions times the amount instead. Wutongqiao, multiple Qianwei existing administrative areas with coal-fired boilers, in accordance with the total capacity and operation of the boiler coal consumption reduction principle of substitution, central heating facilities in the new base construction of the park, but it must be stable ultralow emission standards, and to eliminate the heavy pollution weather and atmospheric environmental quality standards as a prerequisite for a stable schedule, bear autumn and winter peak load shifting and eliminate future responsibility.

2, to carry out comprehensive improvement of the boiler. Increased inspection efforts to prevent the resurgence of small coal-fired boilers. The city is not implemented before the air quality compliance and stability, a ban on new or expanded coal-fired boilers. Municipal Economic and Information Technology Bureau, the Municipal Ecological Environment Agency jointly entrust qualified units, the implementation of the transformation of ultra-low emissions, the use of coal industry enterprises to carry out at least once a major air pollutant emissions supervisory monitoring every year. Ban on new fuel boilers and other cogeneration coal, fuel oil. New gas-fired boiler construction simultaneously low NOx combustion facilities, low NOx combustion is completed before the end of December 2019, the transformation of existing gas boiler. City and county built-up areas the implementation of ultra-low emission biomass boilers transformation.

3, bulk coal use to carry out special rectification. Using coal for use in all high-quality coal, coal mines by 2020, all built to retain supporting washing facilities, the city's raw coal rate of 90%. In accordance with the principle of progressive advance of Pingba first, and then the mountains, the "coal to electricity," which, according to local conditions in key areas to promote rural villages, "coal to electricity, coal to natural gas" work. A total ban on the circulation and use of low quality coal, bulk coal investigate unlicensed business activities according to the law, high-pollution fuel combustion zone ban is abolished bulk coal sales outlets, to promote electricity instead of coal, substitution of gas for coal, to promote the use of clean coal, advanced civilian stoves . In 2020, within 30 km surrounding county town and township range of the main city of almost no bulk coal use.

4, accelerate clean energy alternatives. The implementation of "gasification of the city, alternative energy, clean alternative" projects, subsidies to change the electric boiler. 2020 non-fossil fuels in primary energy consumption should increase to more than 38%. Research to develop new energy truck traffic right of way, to encourage policies on sustainable management, new and replacement buses, rental, sanitation, postal services, commuter, logistics and other light vehicles with electric vehicles. By 2020, postal services, urban delivery, light sanitation basic vehicle for the electric car, for the van passes light logistics vehicle essentially electric cars, buses central city using all new energy vehicles and reached the country six emission standards for natural gas clean energy vehicles.

Gas coal fired boiler for filling machine kicked off the development of chemical industry, chemical industry, although new is an important part of the national economy, however, mention it, our first thought is of high pollution, high toxicity. Therefore, how to reduce pollution and achieve sustainable development has become a top priority of all issues. Boiler chemical industry as an indispensable production equipment, damage to the environment if it is reduced, it is to achieve sustainable development has added new impetus. Gas boiler appears just to meet this demand, the development of chemical industry opened a new prologue. Gas boiler, listen to know the name is the use of natural gas boiler heating. Natural gas, we all know that it is one of the clean energy, the combustion process emits only a small amount of exhaust gas, the environmental impact is very small, and unlike coal-fired boilers will produce the same waste, therefore, very much in line with national environmental policy Claim. If you use this boiler chemical industry, that pollution will be greatly reduced. In addition, its high combustion efficiency than conventional coal-fired boiler lot, can greatly reduce the input costs of fuel. If this alternative boiler coal-fired boiler, a year can save a lot of coal resources for the country, greatly reducing the damage to the environment caused by coal mining. Emergence of gas-fired boiler, only allows chemical companies to reduce pollution of the environment, can also improve production efficiency, reduce production costs, can be said to serve several purposes. It turns out, is the market development needs, will surely opened a new prologue for the development of the chemical industry.

Applicable fuel: coal, biomass, coal mixed with biomass

Circulating fluidized bed boiler application:

Biomass power generation is attracting more and more attention because its nearly net zero emission of carbon dioxide and its high fuel flexibility. Compared to coal, biomass has lowemission of SOx and particulate matters from the combustion process because its low sulphur and ash content. So biomass utilization played a significant role in the development of environmentally friendly society. Grate-fired coal fired boiler for filling machine has the advantages of lOW investment cost and high ruel flexibitity and it iS the main technology of biomass power generation and heat supply. In this paper, numerical similation of the flow field Was carried out with FLUENT software for double—grate biomass fired boiler, the results were validated by experimental data taken from a 1/30 scale cold model of the prototype.