coal fired water pipe hot water boiler
Small gas steam boiler gas boiler works as the name implies refers to the fuel gas boilers, gas boilers and oil-fired boiler, electric boiler compared to the most economical, most people have opted for a gas-fired boiler steam boiler facilities, heating, bath with . Gas boiler comprising KS-Q water gas boiler, CLHS (CWNS) gas coal fired water pipe hot water boiler, LHS (WNS) gas steam boiler and the like, wherein the gas comprises a gas hot water boiler heating boilers and gas boilers bath, with the state "natural gas "project implementation, gas boiler gradually become the people's choice. Evaporation general industrial boilers are relatively small, all below 40, to about 10-35, mostly, but also the use of industrial boilers and boiler power plant are not the same, the main industrial production boiler steam and hot water requirements index is not very high, Some general-purpose industrial steam is used, for example, a lot of steam seal the furnace, hot water steam heating and other uses, in the form of industrial boilers, furnaces most mostly a chain, because chain boiler technology is mature, simple and reliable construction, also automated, etc. factors, by the majority of users of all ages boiler. Chain has chain structure of the furnace grate, coal gate, eagle iron, the furnace, the slag discharge pipe, water wall, the upper and lower header, superheater (steam boiler there), the convection tubes, upper and lower collection tank (also known as drum), province coal filter, air preheater, and corresponding systems and auxiliary pumps and fans, as well as instruments and other devices. The structure is characterized before and after the formation of more water wall furnace arch, it is to promote ignition and combustion, the combustion more complete. Grate bin wind, the wind can be equipped according to the amount of coal burned specific distribution of silos. There are pulverized coal power plant boiler circulating fluidized bed boiler and the main in an amount greater evaporation gas boilers, high efficiency, structure and chain furnace different, similar to the structure of pulverized coal and circulating fluidized bed boiler, but different principles, coal powder and circulating fluidized bed boiler furnace are used with a bed of air holes, the primary air into the drum by the bed, secondary air into the furnace to carry the pulverized coal combustion mixture is formed, separated by the cyclone after burn unburned complete coal combustion again, fluidized bed boiler pulverized coal stream is formed form, better than pulverized coal fired combustion, combustion, low temperature combustion is also achieved, reducing the emission of nitrogen oxides. Fuel oil-fired boiler is fuel (such as diesel, oil, kerosene, etc.), fuel gas-fired boiler to gas (such as natural gas, city gas, methane, etc.), depending on what fuel boiler combustion devices called burner, gas burner configuration called boiler gas-fired boiler, oil boiler burner configuration called oil-fired boiler, oil-fired boiler and gas boiler difference is that what fuel burners.
Burning coal in primary energy in the heating field will maintain the central position in the next several years.For a vast use of coal power, coal sulfur content distribution is very uneven, of which about 50% are in high sulfur coal (Sar>1%), harmful gas, coal-fired emissions of sulfur dioxide, nitrogen oxides, such as environmental pollution is becoming more and more serious. In order to improve this situation, at the same time, continue to use coal as a large heating fuel, the use of 58MW circulating fluidized bed coal fired water pipe hot water boiler can be said to be true.
Boiler equipment belongs to special, complicated structure design, operating environment is more severe, during use, is often influenced by temperature and pressure stresses and alternating. If long-term use down, inspection and maintenance neglect boilers, boiler operation will likely cause reduced efficiency and security risks. Once accidents, often fatal. But many companies and personal security awareness is not strong, it is still a long time to run the boiler inspection, inability to control the operation of the law of the boiler, there is a big security risk.
Recently, Gaoyou City, Jiangsu Province for coal-fired boilers Market Authority has embarked on a comprehensive inspection operations, according to "comprehensive coverage, thorough investigation, replicability, results-oriented" principle, the use of coal-fired boiler business diagnostic investigation, and effectively eliminate security risks.
City Supervisor Bureau focus on verification of the actual use of coal-fired boiler units, using the address, use, heating, technical parameters, test status, filing one by one, do on-site inspection records strict accordance with relevant provisions, retained image data. To phase out coal-fired boilers to be found in the inspection, and urge the relevant units to implement the safety responsibility, and return in time for retirement procedures using the registration certificate. So far, the council has issued eight safety supervision instructions to complete the verification of the use of 14 units of 45 coal-fired boilers and filing, of which three units have been deregistered 15 piece of equipment.
Details of operation of the boiler details chemical energy chemical energy Note 1 Note that operation of the boiler, fuel delivery is controlled with respect to the thickness of the layer of coal-fired boilers, the actual operation, the particles of different sizes on the same coal seam, unreasonable distribution, uneven ventilation, combustion is not uniform. The method can be employed uniformly stratified combustion to coal, to improve seam incomplete combustion: first administration of large particles of coal in the lower layer, the upper layer after administration minimal, large particle surface area of small particles of coal, the need to burn a long time, this time is in the air the highest concentration of oxygen lower position; the other hand, small particles of coal on top, large surface area, a low oxygen concentration, full use of excess air. 2, the flow regulating damper excess air ratio is too large, a large loss of smoke; excess air ratio is too small, incomplete combustion loss is large, and therefore need to properly regulate the air flow to minimize loss of two or more. Usually in the flue gas analyzer backpass smoke, the control amount of wind of carbon monoxide is reduced to a reasonable value. For unconditional for gas analysis, empirical judgment by the naked eye can see the flame in the furnace, the flame pale described excess air amount; brown opaque flame, smoke black smoke indicates incomplete combustion. 3, there is a 1mm thick scale surface water quality management experiment boiler heating surface, waste of fuel from about 3% to 5%, in the presence of 3mm thick scale, waste of fuel of about 5% to 10% . Water two general steps: pre-treatment, ion exchange or reverse osmosis. 4, cleaning blowdown gray scale or fouling deposition in the heating surface, increased heat resistance, reduced heat absorption wall, to improve the furnace exit gas temperature, boiler output decreased, but to increase the amount of cast coal, causing furnace exit gas temperature further improve a vicious circle. Therefore, timely cleaning clear dirt is particularly important. 5, the energy efficiency of the heat insulation testing industrial importance boiler showed small boiler in the case of good thermal heat radiation loss is about 3%, if the wrong selection insulation material, the thickness is too small, or even damage, does not include local heat, heat losses will be higher, the boiler has been running, has been caused by waste heat into the air. When the shutdown check whether the furnace wall insulation bricks off; isolated brick flue check is complete, to avoid shorting the flue gas; outer portion boiler, steam pipes and other insulation damage to be repaired; when heat insulation, low thermal conductivity of the material ( i.e., materials with good thermal insulating properties) on the inner layer having a better thermal insulation effect; respond to the economizer outer insulating layer for laying under conditions permitting. 6, to solve the problem of air leakage air leakage boiler boiler unit during operation is a common problem, the need to ensure the tightness of the boiler, furnace air leakage above all, do not close the site to check the furnace wall, door, inspection holes, etc., can be candles law, candles near these places, to observe whether the candle flame inward deflection to judge. Second leakage tail heating surface, the flue stack leakage mostly welding cracks, elbow bend, the expansion joints wear wear; mostly air superheater corrosion or wear leading to leakage through the pipe, the boiler shutdown should focus an examination.