A method for recovering waste heat from kiln head chimney exhaust gas
A waste heat recovery and chimney technology, which is used in waste heat treatment, cleaning heat transfer devices, lighting and heating equipment, etc., can solve the problems of affecting heat exchange efficiency and the inefficient and reliable cleaning technology of waste heat boiler heat exchange surface. The effect of recycling efficiency
Active Publication Date: 2021-12-28
HANGZHOU SHANYA SOUTH CEMENT CO LTD
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Problems solved by technology
[0004] At present, in the utilization of waste heat from kiln chimney waste gas, the main problem encountered is that the cleaning technology on the heat exchange surface of the waste heat boiler is not efficient and reliable. After the heat exchange surface of the heat exchange tube greatly affects the heat exchange efficiency
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[0024] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.
[0025] Such as Figure 1-4 As shown, a method for recovering waste heat from kiln chimney exhaust gas comprises the following steps: a. the air duct introduces the high-temperature exhaust gas discharged from the kiln chimney into the grate cooler; The exhaust gas is introduced into the high-temperature superheater boiler, and the high-temperature exhaust gas is recycled and used as a heat source for clinker production in the kiln or steam turbine for power generation; c. The medium-temperature air pipe introduces the medium-temperature exhaust gas in the grate cooler into the waste heat recovery furnace, and is discharged from the high-temperature superheater boiler The medium-temperature waste gas is also introduced into...
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The invention discloses a method for recovering and utilizing waste heat from kiln head chimney exhaust gas, which comprises the following steps: a. The air pipe introduces the high-temperature waste gas discharged from the kiln head chimney into the grate cooler; b. The high-temperature air pipe guides the grate cooler The high-temperature waste gas is introduced into the high-temperature superheater boiler, and the high-temperature waste gas is recycled and used as a heat source for the production of clinker in the kiln or the steam turbine for power generation; c. The medium-temperature air pipe introduces the medium-temperature waste gas in the grate cooler into the waste heat recovery furnace, from which the high-temperature superheater boiler The exhausted medium-temperature exhaust gas is also introduced into the waste heat recovery furnace, and the waste heat recovery furnace recycles and utilizes the medium-temperature exhaust gas as a heat source for waste heat power generation; d. By adjusting the opening of the valve, the air volume entering the medium-temperature air duct from the high-temperature air duct is controlled. The high-temperature exhaust gas in the high-temperature air duct is introduced into the medium-temperature air duct according to a predetermined amount, and is used for waste heat recovery furnace to generate waste heat power generation. The invention has the advantage of improving the recycling efficiency of waste heat of exhaust gas.
Description
technical field [0001] The invention relates to the technical field of recovery of waste heat from cement production, in particular to a method for recovery and utilization of waste heat from kiln chimney exhaust gas. Background technique [0002] In the conventional cement waste heat power generation system, the pure low-temperature waste heat power generation process is generally adopted, that is, the AQC boiler located at the kiln head is divided into two heat sources of high temperature and medium temperature. Among them, the high temperature heat source first passes through the ASH superheater (high temperature superheater boiler) , and then into the AQC boiler, the medium-temperature heat source does not need to pass through the ASH superheater, and the high-temperature heat source and the medium-temperature heat source are used separately. [0003] However, this design has the problems of low valve opening in the high temperature section, low inlet temperature in the ...
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IPC IPC(8): F27D17/00F27D3/00F27D25/00F28G1/00F28G9/00
CPCF27D17/004F27D17/008F27D3/00F27D25/008F28G1/00F28G9/00F27D2003/0014F27D2003/0083Y02P10/25Y02P40/121
Inventor 顾快张剑石小芳李艳静刘方权
Owner HANGZHOU SHANYA SOUTH CEMENT CO LTD