gas burned boiler for a sugar industry
Efficiency of the CFB Combustion Process
Fluidized-bed boilers are the most common type of boiler recommended for biomass fuel, which is burned within a hot bed of inert particles, typically sand. The fuel-particle mix is suspended by an upward flow of combustion air within the bed. As velocities increase the gas/solid mix exhibits fluid-like properties. According to theEPA's "Combined Heat and Power Partnership Biomass fired cogeneration plant CHP Catalog," the scrubbing action of the bed material on the fuel also enhances the combustion process by "stripping away the CO2 and solids residue (char) that normally forms around the fuel particles . . . allowing oxygen to reach the combustible material more readily and increase the rate and efficiency of the combustion process."
Boiler precipitator technical principles of environmental protection and the development trend in recent years, the rapid development of gas power plant burned boiler for a sugar industry in the direction of large-capacity, high-parameter, either manufacturing or operations management have been close to the advanced level. Boiler and gas industry to maintain large, widely distributed, high energy consumption, heavy pollution, energy efficiency and pollution control the overall level compared with foreign countries have a certain gap, a huge energy saving potential. By the end of 2012, China's use of gas in industrial boilers 467 000 units, with a total capacity of 1.78 million tons of steam, the annual consumption of about 700 million tons of coal, accounting for over 18% of the country's total coal consumption. China's gas lower overall energy efficiency of industrial boilers, about 15 percent of its actual operating efficiency lower than the international advanced level, with great potential for energy savings. In recent years the rapid development of technology the dust bag, in particular accessory bag filter (dust bag, dust bag cage pulse valve, control of the PLC technology, etc.) to improve quickly, while baghouse 10% desulfurization efficiency can be improved It is dry boiler flue gas desulfurization one of the major thermal power plant equipment. Boiler precipitator dust is the most effective pollution control equipment. It has a high dust removal efficiency, after the flue gas-containing filter baghouse dust concentrations below 50mg / m3, even at 10mg / m3 or less, and can efficiently remove the fine dust particles. Boiler boiler precipitator not just in the production of which use can also be used in other fields of thermal power. During use of the boiler generating the flue gas and dust is inevitable, the boiler boiler precipitator dust is separated out from the flue gas, thus reducing the dust pollution and facilitate further flue gas desulfurization, denitrification process. Spark arrestor smoke dust is mainly used in some high temperature and flue gas containing process Mars. For example, the flue gas cupola, intermediate frequency furnace flue gas, a furnace flue gas and so on. The main role is to eliminate smoke sparks, to avoid burning dust bag. Spark arrestor has a variety of structural forms, cyclone, louvered like. The most effective way of collecting cyclone is, the guide vanes guide the flue gas using a cyclone-type rotational flow, after the dust and large particles Mars cylindrical guide vane duct wall collision or off. When the smelting furnace flue gas containing spark large particles, dust bag will cause damage. Mars trap can effectively trap particles Mars in the flue gas, the protection of the bag filter. The entire device by the PLC control unit, automatic cleaning, discharging and automatic temperature control and over-temperature announcer.
Since March, Harbin City Bureau of ecological environment began to organize special supervision to carry out coal-fired burned boiler for a sugar industry enforcement issues, 309 sets of unfinished mention boiler and marked the transformation of the city after the 2018 boiler to mention 409 logo revamping supervise enforcement actions taken joint law enforcement and the monitoring center the way, as has been completed, the list of Wuchang city, Bayan, Mulan, Tonghe County, Yilan County, Founder county business checks on double Harbin city.
After steering group went to Harbin City, district, county (city), by reporting to listen territorial ecological Environment Agency and the inspection unit, a preliminary understanding of corporate profiles, boilers, pollution control facilities and pollution-line monitoring equipment on-site supervision and inspection, found the three groups of coverage and is not completely blocked, businesses can not provide the proposed supervisory monitoring data reports or third-party monitoring data report corrections and comments, requirements of territorial ecological Bureau to investigate and punish.
The special supervision and inspection work time, heavy task, environmental inspectors and monitoring to front-line staff in site supervision, to overcome the difficulties, give full play to law enforcement officers proficient in professional knowledge and rich practical experience and other advantages, the successful completion of stage special inspection of law enforcement tasks.
The difference between ordinary and low nitrogen burned boiler for a sugar industry boiler:? With vigorously promote environmental protection department of China's low-nitrogen boiler being applied more and more common. In the eyes of many low nitrogen boiler just meet environmental protection to reduce emissions, but in reality not. The following describes a low nitrogen boiler manufacturers to distinguish the conventional type boiler and low boiler nitrogen for everyone? A difference in emissions due to the different combustion grate firing, combustion chamber, circulating fluidized bed boiler, the furnace of different structure, but also its original NOx emissions when large differences, in general, not specifically for low NOX combustion furnace using technology, circulating fluidized bed original low NOx emissions, NOx raw emission Stoker furnace represented by a chain slightly lower, industrial pulverized coal boiler as burning boiler room, the higher the NOx emissions original, well-known domestic boilers have low nitrogen emissions is greatly reduced. Second, different boiler technology, layer combustion, combustion chamber, circulating fluidized bed boiler may be different with different low NOx combustion technique in accordance with the combustion mode, the combustion boiler for the air distribution layers using an air classifier, and more often to achieve low flue gas recirculation nitrogen combustion; under the influence of a typical flue gas recirculation combustion boiler combustion zone layer, in conjunction with the air fractionation techniques for reducing NOx by catalytic char; super reduction furnace denitration technology in recent years, new furnace denitration techniques, by position reasonable combustion flame spray region ammonia, direct denitration at a high temperature flame. Low Nitrogen mainly the secondary air boiler, the coal to the location and distribution of optimal adjustment of the mouth, or the like to increase the flue gas recirculation system. Third, different security, the center layer after combustion, combustion chamber, low-NOx combustion furnace circulating fluidized bed boiler technology a large number of tests performed, it has been verified in engineering applications, in general, a low nitrogen boiler, security to be higher, the reason for its sales in recent years more and more, there are many users because of its high security, a threat to the space environment small purchase, which is one of its important differences with ordinary boilers.