Flue gas waste heat cascade recycling device
A technology of cascade recovery and waste heat of flue gas, which is applied in the directions of dry gas arrangement, steam generation method using heat carrier, lighting and heating equipment, etc. Effect
Pending Publication Date: 2021-08-10
SUZHOU XIRE ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD +1
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In the prior art, Patent No. 201822042086.5 "A Device for Recovery and Utilization of Flue Gas Waste Heat in Thermal Power Plants" and Patent No. 201620378524.9 "A Device for Recovery and Utilization of Flue Gas Waste Heat in Thermal Power Plants". A device for utilizing waste heat, but the temperature of the flue gas discharged through the chimney is already at a low level, and the utilization efficiency is low
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[0030] A cascade recovery and utilization device for flue gas waste heat, see Figure 1-Figure 6 : It includes an intake pipe 1, a desulfurization device 2, a first-stage waste heat utilization device, a first-stage flue gas post-processing device, a first air outlet pipe 5, a second air outlet pipe 6, and a waste heat recovery device 9; the inlet end of the air inlet pipe 1 Connect the flue gas at the outlet of the air preheater, the output end of the intake pipe 1 is connected to the desulfurization device 2 and then connected to the inlet end of the first-stage waste heat utilization device;
[0031] The first-stage waste heat utilization device utilizes the high-temperature flue gas and discharges it;
[0032] The first-stage flue gas post-processing device treats the flue gas passed through the first-stage waste heat utilization device and discharges it into the inlet end of the first air outlet pipe 5. The outlet end of the first air outlet pipe 5 is provided with a firs...
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The invention provides a flue gas waste heat cascade recycling device, which can directly obtain flue gas at an outlet of an air pre-heater and then recycle the flue gas in a stepped and graded manner, so that the utilization efficiency of flue gas waste heat is improved. The flue gas waste heat cascade recycling device comprises a gas inlet pipe, a desulfurization device, a first-stage waste heat utilization device, a first-stage flue gas post-treatment device, a first gas outlet pipe, a second gas outlet pipe and a waste heat recovery device; an inlet end of the gas inlet pipe is connected with the flue gas at the outlet of the air pre-heater, and an output end of the gas inlet pipe is connected with the desulfurization device and then is connected with an inlet end of the first-stage waste heat utilization device; the first-stage waste heat utilization device utilizes high-temperature flue gas and then discharges the flue gas; and the first-stage flue gas after-treatment device treats flue gas passing through the first-stage waste heat utilization device and then discharges the treated flue gas into an inlet end of the first gas outlet pipe, a first valve body is arranged at an outlet end of the first gas outlet pipe, a temperature sensing device is arranged in the first gas outlet pipe, and the first gas outlet pipe is further provided with the second gas outlet pipe in a bypass mode.
Description
technical field [0001] The invention relates to the technical field of flue gas recovery, in particular to a cascaded recovery and utilization device for waste heat of flue gas. Background technique [0002] How to effectively utilize the waste heat of the flue gas in the boiler flue part is an important technology that needs to be studied in thermal power generation. In the prior art, Patent No. 201822042086.5 "A Device for Recovery and Utilization of Flue Gas Waste Heat in Thermal Power Plants" and Patent No. 201620378524.9 "A Device for Recovery and Utilization of Flue Gas Waste Heat in Thermal Power Plants". A device for utilizing waste heat, but the temperature of the flue gas discharged through the chimney is already at a low level, and the utilization efficiency is low. Contents of the invention [0003] In view of the above problems, the present invention provides a cascaded flue gas waste heat recycling device, which can directly obtain the flue gas at the outlet...
Claims
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Login to View More IPC IPC(8): F23L15/00F23J15/00F26B21/14F22B1/18F01D15/10
CPCF23L15/00F23J15/006F26B21/14F22B1/18F01D15/10F23J2215/20Y02P70/10Y02E20/34
Inventor 焦伟王小华陈敏陈宝康赵俊武梅振锋俞胜捷赵鹏薛晓垒彭小敏刘瑞鹏丁奕文朱晋永姚胜王祝成梁昊王晖
Owner SUZHOU XIRE ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD