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Method and device for high-temperature ultrahigh-pressure reheating waste heat power generation

A technology of waste heat power generation and ultra-high pressure, which is applied in the field of high-temperature and ultra-high pressure reheat waste heat power generation method and its device, can solve the problems of low energy utilization rate, achieve the effects of improving thermal cycle efficiency, low operating costs, and saving resources

Pending Publication Date: 2019-12-06
QUZHOU YUANLI METAL PROD CO LTD
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-temperature, ultra-high-pressure reheat waste heat power generation method and its device, so as to solve the low energy utilization rate of current waste heat power generation equipment using 3.82MPa, 450°C medium-temperature and medium-pressure waste heat power generation technology in the above-mentioned background technology question

Method used

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  • Method and device for high-temperature ultrahigh-pressure reheating waste heat power generation
  • Method and device for high-temperature ultrahigh-pressure reheating waste heat power generation
  • Method and device for high-temperature ultrahigh-pressure reheating waste heat power generation

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Embodiment 1

[0032] A high-temperature and ultra-high-pressure reheat waste heat power generation method, such as figure 1 shown, including the following steps:

[0033] S1: Use the induced draft fan to send the 1000-1170°C rising pipe high-temperature flue gas generated during the production process of the coke production line to the high-temperature and ultra-high pressure reheating waste heat boiler through the gas collection pipe for heat exchange to generate 13.7MPa, 540°C high-temperature and ultra-high pressure steam ;

[0034] S2: 13.7MPa, 540°C high-temperature ultra-high pressure steam generated by the reheating waste heat boiler drives the operation of the pure condensing steam turbine, while the 0.4MPa, 152°C low-pressure steam generated by the boiler is used for the deaerator of the waste heat boiler;

[0035] S3: The 2.9MPa, 350°C gas produced by the high-temperature and ultra-high-pressure steam in the pure condensing turbine is sent to the boiler for reheating. After rehea...

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Abstract

The invention relates to the technical field of environmental protection equipment, in particular to a method and a device for high-temperature ultrahigh-pressure reheating waste heat power generation. The method comprises the following steps that an induced draft fan is utilized to send 1000-1170 DEG C ascension pipe high-temperature flue gas generated in the coke production line productive process to a high-temperature ultrahigh-pressure reheating waste heat boiler through a gas collecting pipeline for heat exchange to generate 13.7 MPa and 540 DEG C high-temperature ultrahigh-pressure steam, and a generator set is used for generating electricity. According to the method and the device for the high-temperature ultrahigh-pressure reheating waste heat power generation, the high-temperatureultrahigh-pressure reheating waste heat power generation technology is adopted to replace an existing 3.82 MPa and 450 DEG C medium-temperature medium-pressure waste heat power generation technology,and the power generation steam consumption rate is about 3 kg / kWh, so that the system energy utilization efficiency is improved by 30% or above, and the boiler type structure and the part configuration of the high-temperature ultrahigh-pressure reheating waste heat boiler is reasonable; high-efficiency heat transfer components are adopted, and a steam reheating device is arranged so that the system energy utilization efficiency can be effectively improved; partial medium-pressure steam can be extracted for reheating by an intermediate stage of a steam turbine and then is returned to the steamturbine to do work so that the system heat cycle efficiency can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of environmental protection equipment, in particular to a high-temperature, ultra-high-pressure reheating waste heat power generation method and a device thereof. Background technique [0002] At present, most of the high-grade flue gas waste heat in the iron and steel industry, such as: CDQ waste heat, non-chemical coke oven tail gas and other heat sources, are currently mainly used by 3.82MPa, 450℃ medium temperature and medium pressure waste heat power generation technology, most of the current 3.82MPa, The 450℃ medium-temperature and medium-pressure waste heat generator set mainly adopts the power generation method of direct pure condensation power generation, and there is no steam extraction and reheating process. The steam consumption rate of power generation is about 4.5kg / kWh to 4.8kg / kWh, and the energy utilization efficiency is relatively low. . With the continuous deepening of waste heat power ge...

Claims

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Application Information

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IPC IPC(8): F27D17/00F22B1/18F22D1/50F01K27/02F01D15/10
CPCF01D15/10F01K27/02F22B1/183F22D1/50F27D17/004F27D17/008Y02P10/25
Inventor 叶新华郑祖强潘卫民雷群军罗志敏姜小峰许杨理
Owner QUZHOU YUANLI METAL PROD CO LTD
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