Integral gasification combined circulation (IGCC) power generation technology coal gasification and desulfurization unit-based ammonia-nitrogen removing device and method

A technology of combined cycle power generation and integral coal gasification, which is applied in chemical instruments and methods, combustible gas purification, combustible gas purification/retrofitting, etc., can solve problems affecting the safe and stable operation of the device, deterioration, and reduction of desulfurization capacity, so as to alleviate the deterioration The effect of reducing the rate, reducing the total amount of ammonia nitrogen, and prolonging the service life

Pending Publication Date: 2017-09-05
HUANENG TIANJIN COAL GASIFICATION POWER CO LTD
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Problems solved by technology

However, the water body produced by the condensation of coal gasification gas contains a large amount of ammonia nitrogen, which eventually enters the water body of the coal gasification device; after the coal gasification gas is exposed to the MDEA solution, part of the ammonia nitrogen component remains in the MDEA solution, and after a certain period of time, the MDEA solution deteriorates , the desulfurization capacity is reduced, which seriously affects the safe and stable operation of the device

Method used

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  • Integral gasification combined circulation (IGCC) power generation technology coal gasification and desulfurization unit-based ammonia-nitrogen removing device and method

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] An ammonia nitrogen removal device based on the coal gasification and desulfurization unit of the integrated coal gasification combined cycle power generation technology, including a stripper 1, a stripping gas cooler 2, a gas-liquid separation tank 3, a condensate return pump 4, and a stripping water pump 5;

[0030] The upper left side of the stripper 1 is provided with a gas condensate inlet 11, and the lower left side is provided with a low-pressure steam inlet 12, and the top nozzle of the stripper 1 passes through a pipeline and the upper pipe of the stripping gas cooler 2. The nozzle at the bottom of the stripper 1 is connected to the inlet of the stripping water pump 5...

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Abstract

The invention discloses an integral gasification combined circulation technology (IGCC) coal gasification and desulfurization unit-based ammonia-nitrogen removing device and method. According to the device, a coal gas condensate inlet is formed in the left upper part of a stripping tower, and low-pressure steam inlet is formed in the left lower part of the stripping tower; the top nozzle of the stripping tower is connected with the upper nozzle of a stripping gas cooler through a pipeline, and the bottom nozzle of the stripping tower is connected with the inlet of a stripping water pump through a pipeline; the outlet of the stripping water pump is connected with a gasification device through a pipeline; the lower nozzle of the stripping gas cooler is connected with the left upper nozzle of a gas-liquid separation tank through a pipeline; the upper nozzle of the gas-liquid separation tank is connected with a sulfur removing and reclaiming device through an ammonia-containing acid gas pipeline; the bottom nozzle is connected with the inlet of a condensate return pump through a pipeline; and the outlet of the condensate return pump is connected with the right upper nozzle of the stripping tower through a pipeline. The device has the beneficial effects that the ammonia-nitrogen accumulation of a desulfurizing agent MDEA solution system can be reduced, the coal gasified gas desulfurizing agent MDEA solution degradation speed can be retarded, and the service cycle can be prolonged.

Description

technical field [0001] The invention relates to the technical field of coal gasification and desulfurization technology of integrated coal gasification combined cycle power generation technology (abbreviated as IGCC), in particular to an ammonia nitrogen removal device and method based on the coal gasification and desulfurization unit of the integrated coal gasification combined cycle power generation technology. Background technique [0002] In the field of IGCC coal gasification and desulfurization, the coal gasification gas contains a large amount of ammonia components. After passing through the water system in the coal gasification device, part of the ammonia nitrogen enters the water body, and the rest enters the downstream purification device with the coal gasification gas, and passes through the coal gasification gas. Condensation, carbon oxysulfide hydrolysis, methyldiethanolamine (MDEA) solution absorbs hydrogen sulfide, the gas is purified, and the purified gas is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/00C02F1/10C02F101/16
CPCC10K1/001C02F1/048C02F1/10C02F2101/16
Inventor 李金杰王相平秦建明李振伟杨承江范旭李宗旸杨思伟李志强王超吴志宏陈宏奎步新战文子强赵伟民孙国平白国威李显韩邢广华王赞宇尹少峰屈卫王亚龙杜浩
Owner HUANENG TIANJIN COAL GASIFICATION POWER CO LTD
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