Cement manufacturing denitration decomposing furnace
A decomposition furnace and denitration technology, applied in furnaces, furnace components, separation methods, etc., can solve the problems of harming the atmospheric environment, cannot be fully reduced, and reduce nitrogen oxide emissions, and achieve high denitration efficiency, reduced emissions, and low investment. Effect
Pending Publication Date: 2022-02-18
卫辉市天瑞水泥有限公司
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Problems solved by technology
If these nitrogen oxides cannot be treated in the decomposition furnace, after they enter C5, they will not be fully reduced when passing
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[0022] Such as Figure 1-3 As shown, the present invention provides a kind of calciner for denitrification in cement manufacture, comprising calciner 1, rotary kiln 2, tertiary air pipe 3 and two groups of preheaters, the middle part of calciner 1 is provided with two first feeding ports and Two second feeding ports 6, the bottom of the calciner 1 is provided with a denitrification zone 5, the lower part of the denitrification zone 5 is provided with four third feeding ports 8 and two fourth feeding ports, and the rotary kiln 2 is arranged at the bottom of the calciner 1 Below, the kiln tail of the rotary kiln 2 is provided with a kiln tail smoke chamber 10, and the top of the kiln tail smoke chamber 10 communicates with the denitration zone 5 at the bottom of the calciner 1, and the kiln tail smoke chamber is provided with two fifth feeding ports, The kiln head of the rotary kiln 2 is provided with a grate cooler (not shown in the figure), and one end of the tertiary air pipe...
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The invention belongs to the technical field of cement production equipment, and particularly relates to a cement manufacturing denitration decomposing furnace, which comprises a decomposing furnace body, a rotary kiln, a tertiary air pipe and two sets of preheaters, four feeding ports are formed in the middle of the decomposing furnace body, a denitration area is arranged at the bottom of the decomposing furnace body, six feeding ports are formed in the lower portion of the denitration area, the rotary kiln is arranged below the decomposing furnace body, a kiln tail smoke chamber is arranged at the kiln tail, a grate cooler is arranged at the kiln head, one end of the tertiary air pipe is connected with the grate cooler, the other end of the tertiary air pipe is connected with the middle of the decomposing furnace body, and the two sets of preheaters are arranged on the left side and the right side of the decomposing furnace body respectively. Each set of preheaters comprise a first-stage cyclone pre-heater, a second-stage cyclone pre-heater, a third-stage cyclone pre-heater, a fourth-stage cyclone pre-heater and a fifth-stage cyclone pre-heater which are sequentially connected from top to bottom, and an ammonia water spray gun is fixedly arranged on the fifth-stage cyclone pre-heater. The cement manufacturing denitration decomposing furnace is stable in operation, free of a catalyst, low in production cost, high in denitration efficiency and capable of effectively reducing emission of nitric oxide in a cement kiln system.
Description
technical field [0001] The invention belongs to the technical field of cement production equipment, and in particular relates to a denitration furnace for cement production. Background technique [0002] In the production process of cement, a large amount of coal is needed as fuel, and nitrogen oxides are inevitably produced when coal is burned at high temperature. The generation type of nitrogen oxides in the cement kiln system is mainly thermal type, followed by raw material type and fast type. Among them, the proportion of fast type is small and can be ignored. Thermal nitrogen oxides are mainly produced in the rotary kiln. The gas phase temperature in the rotary kiln is as high as 1800°C, and a large amount of nitrogen oxides are generated in an environment with sufficient oxygen content. In the new dry production system, 50%-60% of the coal is burned in a lower-temperature decomposition furnace, and the temperature in the furnace does not exceed 1000 ° C. The nitrogen ...
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Login to View More IPC IPC(8): F27D17/00F27D13/00B01D53/34B01D53/56B01D53/78
CPCF27D17/008F27D13/00B01D53/78B01D53/56B01D53/346B01D2251/2062B01D2258/0283Y02P10/25
Inventor 赵睿敏于永现凌金辉冯敏涛张兵喜闫艳选
Owner 卫辉市天瑞水泥有限公司