China grate stoker coal wood fired steam boiler

What is the principle of the boiler? No matter how much the tonnage, the boiler works basically the same. Role of the boiler fuel chemical energy is converted into thermal energy, heating and heat inside the pot with water to become superheated steam having a mass and a sufficient amount (steam temperature, steam pressure) of the steam turbine for use. Now the power plant boiler capacity, high parameters, technical complexity, high levels of mechanization and automation, the main fuel is coal, and coal prior to combustion of pulverized coal first made, and then into the boiler combustion heat release in the furnace. Broadly speaking, the work process is the main boiler fuel combustion, heat transfer, vaporization and heating of the water with the superheated steam and the like. The entire boiler boiler composed of two parts and auxiliary equipment. Boiler: boiler body is the main part of the boiler equipment, is composed of two parts, "pot" and "furnace" composition. "Pot" is the soda system which main task is to attract the heat receiving fuel discharged, the water is heated, evaporated and finally becomes superheated steam having certain parameters. It consists economizer, the drum, the downcomer, the header, water wall, superheater and reheater connecting pipes and other equipment and valves. 1) economizer. Vertically positioned rear of the boiler flue, the use of flue gas waste heat boiler feed water, reducing the exhaust gas temperature, increase boiler efficiency, fuel economy (2) drum. At the top of the boiler, it is a cylindrical pressure vessel, which is under water, the upper portion of the steam is that it accepts the economizer runoff, while the downcomer composed header, Wall water circulation circuit. Wall water absorbs heat generated in the soda mixture was collected in the drum, conveyed by the saturated steam to the superheater steam-water separator (3) downcomer. Water supply pipe water wall, the effect of which is introduced into the water in the steam drum to the lower header redistribution respective waterwall tubes. Dispersion in small diameter and the large diameter downcomers Downcomer two kinds. Small diameter tubular small diameter drops, the water cycle of negative (4) waterwall lower header. The main role of the header is a mass pooled or working fluid through the header to the header redistributed through other conduits. A water wall is thicker lower header tube closed at both ends, its role is connected to the downcomer and the water-cooled wall, so as to function together, mixing, redistribution effect working medium (5) water wall. At the furnace around its main task is to absorb radiant heat of the oven, to evaporate water, which is the main heating surface modern boilers, while protecting the furnace wall (6) superheater. Its role is to drum saturated steam into superheated steam on heating (7) having a predetermined temperature reheater. Its role is done in the steam turbine power section is heated up again, and then continue to work in the steam turbine. "Furnace" is the combustion system, its task is to make the fuel burn in a good furnace, heat. It consists of the furnace, the burner, ignition means, air preheater, the smoke duct and the furnace wall, frame and other components. (1) furnace. It is transferred from the furnace wall and into the water wall for fuel combustion, the fuel combustion in suspension, the release of large amounts of heat within the space. (2) burners. Located on the furnace walls or corners, its role is the fuel and air injected into the furnace at a constant speed, so that it can be well mixed in a furnace in order to ensure timely ignition and rapid and complete fuel combustion. DC sub-burner and swirl burner two basic types. (3) air preheater. Located in the boiler backpass, whose role is to use waste heat of flue gas to heat the fuel required for the combustion air, exhaust gas temperature can be further reduced not only, but also for strengthening the furnace combustion, improve the economy of combustion, pulverized coal drying and conveying is advantageous of. Boiler efficiency can be increased by 2%. And rotary two kinds of charge. (4) smoke duct. From the furnace wall is a pipe, the pipe heating surface and the portion of the tube wall and other components of the package, for guiding the flow of flue gas through the heat exchanger and the respective heating surface, and is divided into horizontal flue backpass. Auxiliary ventilation apparatus comprises auxiliary equipment (delivery, induced draft fan), a fuel transportation equipment, milling system, in addition to ash and dust removal equipment, desulfurization equipment.

At 15:31 on January afternoon 55 points, Zhangjiakou Municipal Publicity Department announced through the official micro-Bo: Zhangjiakou Shiqiao Eastern red floor Combibloc bath center for illegal use of obsolete coal-fired boilers, boiler and furnace door ring gall bladder junction cracking, resulting in rapid ejection soda.

At present, the accident has killed two people were killed and two injured, the injured have been rushed to hospital.

Since the accident the suspect, the suspect has been controlled.

It was a painful stricken by the accident, the suspect illegal use of coal-fired boilers have been eliminated, resulting in four families forever pain.

As can be seen from the government over the country began to strictly limit the use of coal-fired boilers, coal-fired boilers in order to face a fate or modification or elimination of the unlawful use of coal-fired boilers have been eliminated but can cause great harm, the accident is a obvious example.

Therefore, actively cooperate with the investigation of the relevant units of boilers, boiler out of strict compliance with the Code and running, grasp the safe operation of the boiler to a large extent, reduce the occurrence of such tragic accidents.

Gas-fired china grate stoker coal wood fired steam boiler, gas steam boiler buy several natural gas boiler should pay attention to, the purchase of natural gas boilers points to note from the National Development and Reform Commission learned that China's coal to gas steam boiler is widespread promotion of the implementation, will enter a stage of comprehensive reform. Xinjiang is about to be the most important work to complete the rectification, the rectification process of the Central Plains and northern regions also increased the intensity and speed of more than 40% of the coal-fired steam boilers, gas-fired completed the replacement of the country. At this stage there are a lot of users need to buy gas-fired boilers to meet the current national environmental policy, I would buy natural gas boiler problems and the majority of users to exchange views in order to buy the rest assured, with satisfaction. First and foremost do with the current coal-fired steam boiler model number and tonnage, boiler gas production and steam pressure that is being used enough, if we can current production, gas production and pressure on the election of equal size gas steam boiler, if not enough or barely enough, you need to choose a slightly larger model of boiler is the second point you are ready or the near future to expand the scale of production, it is necessary to recalculate gas production gas steam boiler, steam boiler of the gas production and future production scale be able to adapt. I met a lot of friends only consider the current, do not consider the needs of the next few years, thinking only meet the current needs on the line, such as the expansion of production and back. The ideas and practices to create a lot of trouble later, the life of a gas steam boiler is probably about 15, you do not have to change a few years, it is only used when processing a lot of losses. Furthermore, the replacement process is very time-consuming, to re-install the application procedures go again, and delayed production. Do not take precautions, you will regret it. The last thing to note is to ensure that the opening of the gas pipeline, if your area has no natural gas pipeline, is to buy a gas steam boiler also spend the. In determining the purchase of gas-fired, the first not to rush to the boiler transported to the site, first opened gas pipeline things well. A client told me: "I opened a mouth, a natural gas company gave me to do 100,000 a month just to run." So, first hit the point about the relationship, try to spend less money to natural gas mouth opened, then natural gas boiler shipped home.

Necessity textile mill converted to a coal-fired boiler gas boiler is a boiler equipment industry needs is more important, because a lot of links to the papermaking process requires a lot of steam drying, stereotypes and so on. However, along with the national policy of environmental protection departments to ban coal-fired boilers, and now more and more manufacturers have to use coal-fired boilers to coal-fired boilers upgrading or purchasing a new low - NOx emissions. Mills from coal to gas boilers is an important direction of the current transformation of coal-fired boilers, is one of more types of enterprise transformation, especially in the area more natural gas, coal into gas boiler is the main way. 1, in order to transform mechanization layered fired boiler gas boiler, you should first remove the front arch and a rear arch, while increasing the bottom heating surface, instead grate, grate to prevent overheating, combustion; 2, through the furnace heat transfer calculation methods determining the size of the boiler, furnace flame center position, and then pouring furnace work. In order to avoid the center position after arch boiler tubes, based on the original slope of the original arch made pipe. 3, the furnace in order to prevent an explosion, when the coal-fired boiler furnace gas is substituted, or when fuel not atomized combustion gases in the furnace incomplete combustion or heating surface of the end of the furnace, a fire or explosion occurs, should be mounting the appropriate parts of the boiler explosion vent, and to increase the ignition and flame failure protection program control to automatic control means, to ensure safe operation of the boiler. 4, is closely related to the selection and arrangement of the burner and furnace, the filling degree of the flame in the furnace should preferably not to form a dead air. Gas burner arrangement considered reasonable and piping layout, convenient operation, inspection and maintenance;

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