Flue gas tail denitration system for gas internal combustion engine
A gas-fired internal combustion engine and flue gas technology, which is applied to internal combustion piston engines, combustion engines, mechanical equipment, etc., can solve the problems of reducing agent ammonia gas generation, gas internal combustion engine or gas boiler flue gas denitrification, etc.
Pending Publication Date: 2019-04-05
北京工大环能科技有限公司
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Problems solved by technology
[0007] The main purpose of the present invention is to solve the gas internal combustion engine or gas boiler flue gas denitrification problem and the generation of the required reducing agent ammonia in the gas internal combustion engine flue gas denitrification system
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[0028] In the following, the present invention will be further described by taking the flue gas denitrification system of a 4.4MW gas-fired internal combustion engine unit of a distributed energy station as an example in conjunction with the drawings.
[0029] A distributed energy station 4.4MW gas internal combustion engine unit SCR flue gas denitrification system, such as image 3 , The flue gas temperature at the exhaust outlet of the gas internal combustion engine is 430-550°C, the highest can reach 600°C, the power generation output is 4.4 MW, and the flue gas volume is 19888Nm in dry state when the load rate of the gas internal combustion engine is 100%. 3 / h, at standard state, dry basis 5%O 2 condition NO x Both are 500mg / Nm 3 The flue gas outlet temperature of the lithium bromide equipment 2 is 145°C; the suitable temperature range of the catalyst 4 is 170-400°C; a heat exchanger 16 is added between the SCR reactor 3 and the chimney 5.
[0030] The flue gas volume ...
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The invention discloses a flue gas tail denitration system for a gas internal combustion engine. The system comprises a gas internal combustion engine smoke vent (1), a lithium bromide device (2), anSCR reactor (3), a catalyst (4), a chimney (5), an ammonia gas generator (6), a urea solution tank (7), a compressed air tank (8), a urea solution pipe (9), a compressed air pipe (10), a spray gun (11), a regulating valve (12), a fan (13), a bypass flue (14) and a flue (15). According to the flue gas tail denitration system for the gas internal combustion engine, the problems of flue gas denitration of the gas internal combustion engine and the generation of ammonia gas of a reducing agent needed in the flue gas denitration system of the fuel gas internal combustion engine are solved, the system is simple and compact, a large amount of area and space are saved, and the construction cost and the operation cost are saved; the invention further relates to an ammonia gas generator for preparing the ammonia gas, and the ammonia gas conversion rate of urea is improved by optimizing the structure of the ammonia gas generator.
Description
technical field [0001] The invention relates to a denitration system for flue gas tails of gas internal combustion engines, belonging to the field of flue gas denitrification of gas internal combustion engines. Background technique [0002] Gas-fired internal combustion engines, because of their flexibility, high efficiency, and low emissions, can realize cascade utilization of energy through the combined supply of cold, heat, and electricity, and are widely used in energy-intensive facilities, such as municipalities, industrial parks, and commercial real estate. , buildings, hospitals and schools, etc. Special application occasions also put forward higher requirements for the up-to-standard emission of nitrogen oxides in the flue gas of gas-fired internal combustion engines. [0003] In the treatment technology of nitrogen oxides in gas-fired internal combustion engine flue gas, selective catalytic reduction technology (SCR denitrification technology) is currently the main...
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Patent Timeline
Login to View More IPC IPC(8): F01N3/20F01N3/28F01N13/08
CPCF01N3/2066F01N3/28F01N13/08Y02T10/12
Inventor 黄庆华
Owner 北京工大环能科技有限公司