Cement kiln waste heat power generation system

Abstract

The invention discloses a cement kiln waste heat power generation system. The cement kiln waste heat power generation system comprises a grate cooler, an ASH superheater and a kiln head AQC boiler, wherein a high-temperature exhaust pipe is arranged at a first section of the grate cooler and is connected with the ASH superheater; a medium-temperature exhaust pipe is arranged at a second section ofthe grate cooler; a first air guide pipe is arranged at the air outlet end of the ASH superheater and communicates with the medium-temperature exhaust pipe; a settling chamber is connected with the medium-temperature exhaust pipe; the air outlet end of the settling chamber is connected with the kiln head AQC boiler through a pipeline; and a steam outlet pipe is arranged on the kiln head AQC boiler and is connected with the steam inlet end of the ASH superheater. High-temperature flue gas is taken from the first section of the grate cooler and directly enters the ASH superheater to exchange heat with steam at an outlet of the kiln head AQC boiler, and an air outlet of the ASH superheater is jointed with the medium-temperature exhaust pipe through the first air guide pipe, so that flue gasquantity and temperature of the medium-temperature exhaust pipe are increased, inlet flue gas quantity and temperature of the kiln head AQC boiler are ensured, then main steam temperature of a systemis increased, high-quality stable saturated steam is provided for a steam turbine, and power generation capacity is improved.

Description

technical field [0001] The invention relates to the technical field of cement kiln waste heat power generation, in particular to a cement kiln waste heat power generation system. Background technique [0002] The waste heat discharged by the cement kiln during the production process mainly has two parts: ①The waste gas discharged from the C1 cylinder of the kiln tail preheater; ②The hot air discharged by the grate cooler at the kiln head. At present, for the above two parts of waste heat, the waste heat boiler at the kiln head and the waste heat boiler at the kiln tail are mainly used to recover and generate superheated steam, and then the superheated steam from the two waste heat boilers is combined through the steam main pipe and sent to the steam turbine generator unit for work Power generation, the power generated can be used for cement plant production. [0003] In the above cement kiln waste heat utilization method, the temperature of the smoke inlet of the SP boile...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a cement kiln waste heat power generation system to solve the problem that the kiln head AQC boiler takes air from the second stage of the grate cooler. low load problem

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