coal fired fire tube chain grate steam boiler

Beiqi Panther car 6 tons of steam condensing one fuel gas coal fired fire tube chain grate steam boiler project has been successfully completed. This series boiler adopt advanced design concepts, using the waste heat of flue gas cascade, with the use of the condenser and the economizer fully absorb the waste heat in the flue gas, the boiler efficiency has been greatly improved.

Boiler boiler should be classified according to which of several energy conversion device is a way, the energy input to the boiler chemical energy, electrical energy, a boiler with a steam output of the fuel in the constant heat, high temperature water or organic heat carrier. Many types of boilers, we like how to categorize them? Here Jinhe company you explain one by one! Many classification of the boiler, the boiler can be divided according to use, can be divided according to the structure, the type of fuel boilers, but also you can press the water cycle in the form of pressure classification. It can be used as boiler thermal power boilers and heating boilers. Power boiler comprising a power station boilers, marine boilers and boiler locomotive, corresponding to power generation, marine, and locomotive power dynamic. Heating boiler comprising a coal fired fire tube chain grate steam boilers, hot water boilers, hot tube boiler, stove and the heating medium heating furnace, to give a corresponding steam, hot water. Hot air and the heating medium and the like. Boiler by the structure, divided into fire tube boiler and water tube boilers. Fire-tube boiler, including vertical and horizontal boiler boiler, water tube boilers and water tube boilers including horizontal, vertical, water tube boilers. By species classified as boiler fuel gas-fired boiler, oil-fired boiler and upgrade technical gas boiler and gas boiler, furnace oil and gas alternative --- pulverized coal boilers, gas boilers and other dual-use. Combustion gas boiler can be divided into layers by firing boiler, in fluidized bed boilers and combustion chambers. The latest fuel alcohol-based fuel boiler, he will greatly reduce the pollution of the atmosphere of a gas boiler. Evaporation of less than 20t / h is called a small boiler, evaporation to 75t / h is referred to as large boilers, evaporation of medium-boiler referred interposed therebetween.

Introduce some common sense about the boiler 1, the critical speed of the circulating fluid bed boiler. Gas flow rate corresponding to the minimum fluidization velocity or become known as the critical fluidization velocity. 2, the flow characteristics of circulating bed boiler? A high combustion efficiency of the fuel adaptability 2 3 4 desulfurization efficiency is low nitrogen oxide emissions high combustion intensity 5, 6 simply small cross-sectional area of ​​the furnace fuel and coal pretreatment system 7, a large load adjustment range, adjustment is easy to implement fast ash 8 utilization. 3, the partition circulating fluid bed boiler furnace and the corresponding characteristics into dense and dilute phases, a lower dense phase zone of the furnace, filled with hot materials, is a stable source of hot, heat storage is a thermal store , flow therethrough in an upper dilute phase zone of the furnace, the fuel air are required. 4, the positive balance calculation boiler efficiency, combustion of coal, boiler heat losses What? Coal particles is heated and dried: volatile combustion and precipitation: coal particles swell and rupture: re-cracking and coke burning carbon particles and wear. Heat loss 1 2 3 Chemical incomplete combustion loss of physical mechanical incomplete combustion heat of the loss heat loss 4 5 ash. 5, the charging cycle 4 Effect Effect Effect amount of the main factors affecting combustion in the boiler of a coal particle size distribution and particle 2 was 3 Effect fluidization velocity excess air factor 5 bed temperature Dense Phase 6 . 6, the basic form of the heat transfer in? In the heat transfer process, there are three basic ways of heat transfer: thermal and heat transfer, convective heat and radiant heat transfer. 7, their role in recycling and recycling processes? By the economizer feed water into the steam drum, a descending pipe into the water wall, by absorbing the heat released by the combustion of the fuel heating the water in the saturated steam passes through the heat absorbing further heat saturated steam into dry steam heating. 8, sewage, drainage pipe What? Sewer: blowdown drum door (left and right) turn on the water accident door, front door header sewage, sewage tank after the door, left the door header sewage and right door header sewage, sewage water jacket door (about) Dipleg sewage door. Drainage pipe: the low temperature superheater inlet header hydrophobic doors, front / rear desuperheater hydrophobic door header, the high-temperature superheater inlet / outlet header, the header hydrophobic dispensing door. 9, then what are pipe drum? Meter and accessories? Superheater, economizer recirculation duct, platoon expansion tube, a condenser tube, soot blower tube, economizer inlet pipe, the discharge pipe accident, centralized downcomer platoon expansion, a water level gauge, a thermometer, security door, pressure gauge, gas-water separator, header. 10, the cyclone structure and working principle? Cylindrical body, the central cylinder, a cone, a loop seal, the material returning leg, from the high temperature flue gas out of the furnace, two left and right into the two cyclones, increase after turning flue flue gas velocity in the cylinder the center of rotation of the form cylinder back down into the cone upwardly from the central cylinder wall Shuaixiang excluded smoke particles under high effort when the cone reaches the end coupled with its heavy fall below the loop seal. 11, Refeeder role? The ash from the circulation loop seal into the furnace combustion chamber 12, acting characteristics superheater? The use of flue gas heated to a certain pressure saturated steam superheated steam. 13, bag filter works and composition? Principle: inlet flue gas-containing flue dust particles into the lower caul plate over the flue dust reduction chamber, and then through the outlet to reduce the wind speed of the flue draft fan withdrawn via the discharge plenum chamber clean flue upper portion of the bag filter the atmospheric composition: inlet flue, the caul plate, the reduction of flue gas chamber, bag, net flue gas plenum chamber exit gas, ash silo, rotating ash blowing device, the air reservoir. 14, to the mounting position of the coal feeder, the number, composition mounted on the front wall of the furnace, the number of stage three consists of: a motor, a belt coal feeder, reducer, the motor slide. 15, the process of slag from the furnace down the three tap outlet derived by the discharge of slag, after water cooling to cool to a certain temperature onto the cooling belt-type transfusion Pa, and then transported by the inclined transport slag to the slag bin .

What is the main difference between a coal-fired boiler and a gas-fired coal fired fire tube chain grate steam boiler? Nominally, the obvious difference between a gas-fired steam boiler and a coal-fired boiler is that the fuel used is different. The former uses natural gas and the latter uses coal. I think the misgivings of many boiler users are why they should eliminate coal-fired boilers because many have already purchased and used coal-fired boilers. If they switch to gas-fired boilers, it will be a huge expense. Firstly, according to the development direction of China's ecological environment, coal-fired boilers will gradually be replaced by gas-fired boilers or other clean and environmentally friendly energy boilers, and gradually withdraw from the historical stage. Yes. The difference between coal-fired boiler and gas-fired steam boiler is very big, and the main reason for eliminating coal-fired boiler is environmental protection. From the fuel supply part, the gas-fired boiler only needs a pipe to connect to the boiler; the coal-fired boiler requires coal yard, coal (belt or man-made), coal transport, loading and unloading, storage and boiler loading process. It will produce dust, causing serious pollution to people's living environment. From the point of view of atmospheric emissions, the content of dust in natural gas is very small and can be negligible; the ash content of coal is high, and the ash content is about 10% and 30%, which will produce smoke after combustion. If dust removal facilities are reduced, pollutant emissions will be reduced. It will increase; if there are more dust removal facilities, the corresponding costs will increase, which is not a long-term solution. In addition, the sulfur content of natural gas is also very small, coal-fired boiler dust removal, desulfurization and nitrogen removal can be obtained, gas-fired boilers only need to consider the problem of nitrogen removal. From the point of view of other waste emissions, natural gas is basically free of other pollutants, especially urban gas. In the case of coal, coal yards, especially small boilers built mainly in the open air, will produce coal slurry water during the rainy season, seeping into groundwater or sinks. When entering the surface water, the burning ashes are transported to produce dust. Of course, there's a difference in other ways. Different. For small-sized boilers, gas-fired boilers are more energy-saving than coal-fired boilers, with simple equipment flow, small footprint, low operating and maintenance costs, and so on. These are the main differences between coal-fired boilers and gas-fired steam boilers, and the significance of eliminating coal-fired boilers. It can be seen that the use of gas-fired boilers is the general trend of the whole society.

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