Cement kiln waste heat utilization system based on high-temperature SCR device

A cement kiln, high temperature technology, applied in the field of cement kiln waste heat utilization system based on high temperature SCR device, can solve the problems of large alkaline components, high viscosity, small particle size, etc., to reduce serious impact, reduce dust content, temperature increased effect

Pending Publication Date: 2022-04-29
思安新能源股份有限公司
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Problems solved by technology

[0004] However, on the one hand, the flue gas temperature after passing through the high-temperature electrostatic precipitator will drop to about 280°C, and the temperature drop will reduce the reduction effect of the high-temperature SCR device; on the other hand, the dust removal effect of the high-temperature electrostatic precipitator is poor, resulting in The dust concentration in the flue gas of the high-temperature SCR device exceeds the standard. When the flue gas with a dust concen

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  • Cement kiln waste heat utilization system based on high-temperature SCR device

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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] The invention discloses a cement kiln waste heat utilization system based on a high-temperature SCR device, such as figure 1 As shown, it includes the kiln head production subsystem 20 connected to the discharge port of the cyclone preheater 10, and the kiln tail flue gas treatment subsystem 30 connected to the cyclone preheater 10 exhaust port; the kiln head production subsystem 20 and The kiln tail flue gas treatment subsystems 30 are also connected through the heat storage subsystem 40; the kiln tail flue gas treatment subsystem 30 includes a kiln tail waste heat boiler 31 connected to the smoke outlet, and the kiln tail waste heat boiler 31 is dust-removed through the kiln tail cyclone The device 33 is connected with a high-temperature SCR device 35; the high-temperature SCR device 35 is connected with the settling chamber 23 throu...

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Abstract

The invention discloses a cement kiln waste heat utilization system based on a high-temperature SCR device. The cement kiln waste heat utilization system comprises a kiln head production subsystem connected with a discharge port of a cyclone preheater and a kiln tail flue gas treatment subsystem connected with a smoke exhaust port of the cyclone preheater. The kiln head production subsystem and the kiln tail flue gas treatment subsystem are connected through a heat storage subsystem; the kiln tail flue gas treatment subsystem comprises a kiln tail waste heat boiler connected with the smoke outlet, and the kiln tail waste heat boiler is connected with a high-temperature SCR device through a kiln tail cyclone dust collector; the high-temperature SCR device is connected with the settling chamber through the heat storage subsystem; according to the high-temperature SCR device, the content of dust in flue gas entering the high-temperature SCR device can be greatly reduced, the serious influence of the dust on a catalyst in the high-temperature SCR device is reduced, meanwhile, the high-temperature SCR device can be used for replacing a traditional medium-temperature SCR device, and the flue gas denitration cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of cement kiln waste heat utilization, and in particular relates to a cement kiln waste heat utilization system based on a high-temperature SCR device. Background technique [0002] The SCR device is the core device of the flue gas treatment technology. Its function is to inject the reducing agent (ammonia / urea) into the flue gas, and selectively remove the NO in the flue gas under the action of the catalyst. x reduced to N 2 and H 2 O. SCR devices are divided into high-temperature SCR devices, medium-temperature SCR devices and low-temperature SCR devices, where "high temperature", "medium temperature" and "low temperature" refer to the temperature of the flue gas being processed. [0003] In the flue gas treatment of cement kilns, the flue gas in the kiln tail process is usually treated. The temperature of the flue gas discharged from the preheater is usually around 320-350 °C, and the high temperature ...

Claims

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Application Information

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IPC IPC(8): F27D17/00F27D15/02
CPCF27D17/004F27D17/008F27D15/02F27D2017/007F27D2017/009Y02P10/25
Inventor 许肖飞段洋樊智达王媛哲
Owner 思安新能源股份有限公司
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