Spray gun device and method for preventing urea SNCR denitration from corroding water cooling wall
A water-cooled wall and spray gun technology, applied in the directions of injection device, combustion method, separation method, etc., can solve the problems of unplanned shutdown of boiler, extension of urea liquid injection distance, and non-atomization of urea liquid.
Pending Publication Date: 2020-12-29
SHANDONG IRON & STEEL CO LTD
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Problems solved by technology
[0005] When the spray gun is partially blocked or the atomizing gas (compressed air or N 2 ) after the interruption, the urea liquid is not atomized or the atomization is incomplete, and there is a problem that the spraying distance of the urea liquid is prolonged or the liquid drops return to the water wall tube
Due to the strong chemical corrosion and electrochemical corrosion characteristics of urea liquid under high temperature conditions, the urea flowing back to the water-cooled wall tubes can cause corrosion of the water-cooled wall tubes in a very short time, causing unplanned shutdown of the boiler
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[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.
[0031] The technical solutions provided by the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0032] First aspect, such as Figure 1-2 As shown, one embodiment of the present invention provides a kind of spray gun device that prevents urea SNCR denitrification corrosion water wall, and thi...
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The invention discloses a spray gun device and method for preventing urea SNCR denitration from corroding a water cooling wall. The device comprises a spray gun, a spray gun cooler sleeve and a spraygun mounting sleeve. A spray head is arranged at one end of the spray gun, a compressed gas connector and a urea connector are arranged at the other end of the spray gun, the spray gun cooler sleeve is fixedly sleeved outside the spray gun, a cooling gas connector is arranged at one end, away from the spray head, of the spray gun cooler sleeve, the spray gun mounting sleeve is fixedly inserted tothe water cooling wall of a boiler and inclines downwards, The spray gun cooler sleeve sleeves the inner side of the spray gun mounting sleeve, the installation position and the installation angle ofthe spray gun cooler sleeve on the spray gun mounting sleeve are adjustable, and one end of the spray gun provided with the spray head is inserted into the boiler through the spray gun mounting sleeve. According to the spray gun device and method for preventing urea SNCR denitration from corroding the water cooling wall, the problems that the urea spraying distance is increased or liquid drops flow back to make contact with the water cooling wall to corrode and explode the water cooling wall due to the fact that urea is not atomized or not atomized completely can be solved.
Description
technical field [0001] The invention relates to the technical field of boiler flue gas SNCR denitrification, in particular to a spray gun device and method for preventing urea SNCR denitrification from corroding a water wall. Background technique [0002] There is a large amount of NO in the flue gas generated during the operation of the boiler X , in order to prevent excessive NO in the flue gas X To pollute the environment, the flue gas should be denitrified, so the boiler needs to increase the denitrification process. The SNCR (selective non-catalytic reduction, selective non-catalytic reduction) process using urea as a reducing agent is currently a popular flue gas removal technology. After the spray gun between the tube bundles is atomized, it is sprayed into the furnace, and the NO X Reduction reaction occurs, NO X decomposed into N 2 and H 2 O discharge up to standard, no secondary pollution. [0003] At present, when performing flue gas SNCR denitrification, t...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B01D53/79B01D53/56B05B12/00B05B12/08B05B15/60B05B15/68F23M5/08
CPCB01D53/56B01D53/79B01D2251/2067B01D2258/0283B05B12/006B05B12/08B05B15/60B05B15/68F23M5/08
Inventor 刘俊明赵燕鹏韩明杰王站汪鑫李喜青宫琛琛贺中爱蒋力
Owner SHANDONG IRON & STEEL CO LTD