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System unit and method for increasing temperature of SCR reactor

A technology for SCR reactors and system devices, applied in feed water heaters, preheating, steam superheating, etc., can solve problems such as failure to meet environmental protection requirements, affect efficiency, and low smoke temperature at SCR inlet

Inactive Publication Date: 2017-05-31
华电电力科学研究院有限公司东北分公司
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Problems solved by technology

[0009] The invention provides a system device and method for increasing the temperature of an SCR reactor, the purpose of which is to solve the problem of long-term low-load operation of large-scale power plant unit boilers, low smoke temperature at the SCR inlet, seriously affecting its efficiency, and failing to meet environmental protection requirements

Method used

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  • System unit and method for increasing temperature of SCR reactor
  • System unit and method for increasing temperature of SCR reactor
  • System unit and method for increasing temperature of SCR reactor

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing, the present invention will be further described:

[0030] As shown in the figure, the present invention proposes a system device for increasing the temperature of the SCR reactor, which includes a boiler steering chamber and an economizer. Two bypass pipes are connected to the SCR reactor inlet at the boiler steering chamber to the outlet of the economizer. flue.

[0031] The two bypass pipes are circular pipes.

[0032] A valve for controlling the switch is set on the pipeline, and the valve is controlled by the boiler DCS, and the temperature sensor at the inlet of the SCR reactor is also connected to the boiler DCS.

[0033] An anti-leakage locking device is also provided at the connection between the bypass pipe and the inlet flue of the SCR reactor, which includes a compression buckle 1 and a tension lock; The leak-proof pad 2 at the joint of the pipeline, the compression spring 3 is placed between the compression b...

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Abstract

The invention provides a system unit for increasing the temperature of an SCR reactor. The system unit comprises a boiler reversing chamber and a coal economizer, and is characterized in that at the boiler reversing chamber, two bypass pipelines are connected to an inlet flue of the SCR reactor at the outlet of the coal economizer. According to the system, by utilizing pressure difference formed between different heated surfaces of a boiler in operation, about 510 to 550 DEG C of medium-temperature flue gas is sucked from the boiler reversing chamber, is divided and sent to the two bypass pipelines, and is connected to and enters the inlet flue of the SCR reactor at the outlet of the coal economizer. The amount of the sucked flue gas is not more than 10% of the total amount of the flue gas under the load, and the suction amount is relatively moderate, so boiler water supply and main reheated steam temperature are barely affected.

Description

technical field [0001] The invention relates to a system device and method for increasing the temperature of an SCR reactor. Background technique [0002] European countries are relatively advanced in thermal power flexibility technology. The thermal power units in Denmark are basically combined heat and power units. The minimum output during the winter heating period can be as low as 15%-20%. The technical output of coal-fired units can be as low as 25%. [0003] According to the statistics of national scale power generation installed capacity and power generation in 2015, the installed capacity of gas turbines in 2015 was only 4.4%, and the proportion of power generation was 3%, which was similar to that of wind power at 3.3%. , and the construction period is long. Chemical energy storage has not yet been commercialized on a large scale. my country's energy structure is still dominated by thermal power. [0004] According to the statistics at the end of 2014, there wer...

Claims

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Application Information

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IPC IPC(8): F22D1/00F22G3/00F23J15/02
CPCF22D1/00F22G3/00F23J15/02
Inventor 吴景兴马金凤高玉新王文生袁德权蒋翀谭袖李彦龙孙伟宋阳张海楠
Owner 华电电力科学研究院有限公司东北分公司
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