The characteristics of internal circulating fluidized bed boiler

The internal circulating fluidized bed boiler (ICFB) efficiently co-combusts industrial waste, biomass fuel and coal, provides steam or hot water, and sets new standards in limiting SOx and NOx generation. In addition to the characteristics of general CFB boiler, the internal CFB boiler also has the following special structure and characteristics:

1. The internal CFB boiler has buried pipes, which can increase the heating area and regulate the temperature in the dense area.

2. The internal CFB boiler has a large area of air distribution bed, so that the boiler has more heat storage, which is conducive to fuel combustion and burnout, and provides a congenital condition for a wider variety of coal adaptability;

3. The internal CFB boiler has a large cross-sectional area of the furnace, the flow rate of flue gas is low, which can improve the primary combustion rate of fuel, reduce the wear of the furnace, reduce the power consumption and energy consumption;

4. The wind arch composed of secondary air can supply oxygen and disturbance on the one hand, and on the other hand, can lengthen the combustion time of coal, which is conducive to coal burnout;

5. Water-cooled membrane wall of the cyclone separator, effectively prevent high temperature coking and center cylinder bias, which improves the efficiency of the separator;

6. Porous and controllable feed return valve makes the feed return reliable, even if the feed return has a coke block, since there are a lot of feed back port, there is no need to immediately stop the furnace, the user can stop the furnace when it is available for them to clear the coke.

7. Tail flue gas duct patented technology: water cooling furnace roof and chevron water cooling flue gas duct, can effectively solve the roof and smoke wall collapse and leakage of ash or air, which improve the environment of the boiler room.

Wood waste water tube steam boiler is a kind of biomass fired steam boiler, which mainly takes biomass energy as its fuels, such as rice husks, straw, tree branches, firewood, corn cob, cane bagasse, lees, palm shell and other wood waste as its fuels.

The temperature difference between the wall surface of the vertical steam boiler steam is generated during the vertical steam boiler generates steam, and pressure in the heating, when the temperature is higher than the outer wall temperature of the inner wall, the wall temperature is higher than the temperature of the lower wall, and wall thickness of the vertical bubble there is a temperature difference between the walls, i.e., the inner wall temperature of the bubble is higher than the temperature of the outer wall, the wall temperature is higher than a temperature lower wall, an outer wall and inner wall temperature is higher than the temperature of the inner wall temperature is higher than the outer wall temperature, the wall temperature is higher than the temperature of the lower wall , the wall temperature is higher than the outer wall temperature, the wall temperature is higher than the temperature at the wall, the inner wall temperature is higher than the outer wall temperature. Steam boiler is an energy conversion device, the energy input to the boiler fuel chemical energy, electrical energy, thermal energy and other forms of high temperature flue gas, and after converting the boiler, the steam output having a certain outside thermal energy, high-temperature hot water or an organic carrier. Biomass boiler is a kind of boiler to biomass energy as a boiler fuel called biomass boilers, steam boilers into biomass, biomass full automatic 0 7mw industrial biomass fired hot water boiler, biomass stove, biomass thermal oil heaters, vertical raw biomass boilers, biomass boilers and other horizontal. In order to prevent excessive thermal stress, it is necessary to slow the vertical steam boiler booster. Vertical steam boiler ignition and boosting process conditions steam parameters, each component level and also changing. Therefore, in order to effectively prevent the occurrence of abnormal conditions and other hazards, it is necessary to arrange closely monitor vertical steam boiler various instruments directive professionals change. Since the vertical steam boiler water temperature continues to rise, the metal wall temperature of the bubble and the evaporator heating surface begins to rise at any time, it is necessary to pay attention to temperature and thermal stress of thermal expansion of the bubble, since the bubble wall thickness is relatively thick, so vertical the main problem in the steam boiler heating thermal stress. At the same time, also considering the overall thermal expansion problems, especially vertical tube steam boiler heating surface, since the wall thickness, length of problems in the process of heating the whole of the problems of thermal expansion, it should also be noted that the thermal stress. Prevent inadvertent failure caused.

Recently, located in Yan'an City, Shaanxi Province, Huanglong held removal of coal-fired boilers mobilization meeting, and promote the coal-fired boiler, "clear" work, Huanglong improve the overall air quality of the environment. The meeting was chaired by the Deputy Mayor Cao Zengjun, County Authority, Environmental Protection Agency, the Public Security Bureau and other coal-fired boilers Chaigai leading group members of the unit involved in coal-fired boilers and Chaigai of 16 enterprises and units attended the meeting.

At the meeting, urban management bureau announced the "urban transformation of coal-fired boiler demolition plan", and county coal-fired boiler demolition work arrangements for the deployment. Program pointed out, the county government before the end of June to remove their coal-fired boiler steam tons per 20,000 yuan subsidy standards in accordance with the relevant provisions of the provincial coal-fired boilers Chaigai subsidies, Chaigai completed in the first six months to the end of August unit task of tons of steam per 10,000 yuan subsidy standards, after the completion of the end of August Chaigai units should be punished to the unit in addition to the removal of subsidies, the person in charge accountable.

A coal-fired boiler Chaigai work is the key point to win the Battle of the blue sky, Huanglong is an important measure to improve the quality of atmospheric environment, the relevant units should fully understand the importance and urgency of the boiler Chaigai work, according to "own boiler demolition themselves, change themselves, government agencies take the lead in demolition, lead change, limited time limit must be removed, must be changed "requirements, implement them.

Second, the change involved units to firmly establish the overall awareness, to overcome the luck, to seize the opportunity boiler Chaigai premium policy, a reasonable choice of the transformation of the way, adhering to standards, early arrangement, early deployment, early start.

Third, the government supervises the room should work together with urban management, environmental protection and other departments, inspectors conduct regular supervision, to dismantle ineffective, slow-moving unit, to be criticized, and timely feedback evaluation to do, do you want to do a good evaluation appraisal work; County JISC to errant Chaigai, affected units and individuals county atmospheric objective assessment of the results, in accordance with the "air pollution prevention of accountability measures" be accountable, accountability, ensure on schedule to complete the work Chaigai city coal-fired boilers.