Gas making compound combustion chain furnace

Abstract

The invention relates a gas making compound combustion chain furnace; a preposing preburning vertical furnace is arranged at the front end of a chain grate, the two sides of the inner wall of the vertical furnace are provided with wind chambers provided with air outlets; a fire coal inlet which is arranged at one end of the upper part of the preposing preburning vertical furnace is connected witha coal supply scuttle, and the other end of the upper part of the vertical furnace is provided with a coal gas outlet that is communicated with a grate-fired furnace; the lower part of the preposing preburning vertical furnace is provided with a coal outlet which is communicated with the chain grate; a gas chamber is internally provided with an induction air duct, the front end of the grate-firedfurnace is provided with a declinate face arch used for supplemental firing and a gas lighting-up tuyere, and the preposing preburning vertical furnace is arranged in the front of the chain grate; the coal is on fire to burn in advance in the preposing preburning vertical furnace, and coal gas is generated in a following way, so that furnace combustion is greatly strengthened, and the flying ash quantity is further reduced, thus not only maintaining the advantages of the combustion of the chain grate, but also thoroughly overcoming the inherent disadvantages of the combustion of the chain grate.

Description

technical field [0001] The invention relates to a chain grate gas composite combustion chain furnace with the function of self-made gas. technical background [0002] Chain grate combustion is the most widely used combustion technology for coal-fired industrial boilers and industrial kilns. Its advantages are simple system, reliable operation, low operating power consumption, and the proportion of fly ash is higher than that of coal powder, coal-water slurry, and circulating fluidized bed. The combustion is much smaller, the cost of flue gas purification is low, and the ash is easy to handle. It is more suitable for the small and scattered characteristics of industrial boilers and industrial kilns. Coal-fired industrial boilers in all countries in the world are mainly chain boilers. Its inherent disadvantage is that the coal cannot be ignited immediately after entering the furnace, and it needs to go through a long drying and preheating process. The heat required for drying,...

AI Technical Summary

Problems solved by technology

Its inherent disadvantage is that the coal cannot be ignited immediately after entering the furnace, and it needs to go through a long drying and preheating process. The heat required for drying, preheating and subsequent ignition comes from the flames that have already burned in the furnace and the front and rear arches of the refractory materials that have been roasted red. For radiant heat, coal can only be guided from the upper surface of the coal seam first, and the drawn flame will gradually spread to the bottom of the coal seam, while the air required for combustion is sent upward from the bottom. This kind of reverse propagation of flame and air is not conducive to combustion. , so the combustion intensity and combustion efficiency of the chain grate are low, and it is difficult to adapt to the coal with low volatile content, high moisture or ash content

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