Subcritical coal-fired boiler full-load denitration system
A coal-fired boiler, full-load technology, applied in the field of flue gas denitrification, can solve the problems of sintering failure of denitrification catalyst, deactivation of denitrification catalyst, reduction of denitrification efficiency, etc., and achieve the effect of small system changes, obvious effects and low investment
Pending Publication Date: 2022-01-07
HUANENG CHONGQING LUOWEN POWER CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to solve the above problems, and a full-load denitrification system for subcritical coal-fired boilers has been designed, which solves the problem that most of the existing power plants adopt selective catalytic reduction (SCR) denitrification process, and the SCR denitrification process has a negative effect on flue gas. The temperature has strict requirements. When the flue gas temperature is higher than 420°C, the sintering of the denitrification catalyst will fail, and when the flue gas temperature is lower than 310°C, in addition to reducing the denitrification efficiency, the ammonium bisulfate generated will also block the capillary pores of the denitrification catalyst. , resulting in the technical problem of permanent deactivation of the denitrification catalyst
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Embodiment
[0044] Embodiment: a subcritical coal-fired boiler full-load denitrification system, including a flue gas pipeline 1, and a denitrification structure is installed in the flue gas pipeline 1;
[0045] In the specific implementation process, the denitration structure includes: economizer 2, SCR denitration device 3, motor 4, gear 5, two slide rails 6, rotating spraying disc 7, ring gear 8, storage tank 9, delivery pipe 10, A number of discharge heads 11, circulation components, water supply components and steam components;
[0046] The economizer 2 is installed at the upper end of the flue gas pipeline 1, the SCR denitrification device 3 is installed at the center of the flue gas pipeline 1, the motor 4 is installed on one side of the flue gas pipeline 1 and the driving end is embedded in the flue gas pipeline 1 through a sealed bearing Inside, the gear 5 is installed on the driving end of the motor 4, the two slide rails 6 are installed in the flue gas pipe 1, the rotating spra...
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The invention discloses a subcritical coal-fired boiler full-load denitration system which comprises a flue gas pipeline, and a denitration structure is installed in the flue gas pipeline. The denitration structure comprises a coal economizer, an SCR denitration device, a motor, a gear, two sliding rails, a rotary spraying disc, a gear ring, a containing groove, a conveying pipe, a plurality of discharging heads, a circulating assembly, a water supply assembly and a steam assembly. The subcritical coal-fired boiler full-load denitration system has the beneficial effects that according to the denitration structure, flue gas generated by a boiler enters the coal economizer, the water supply assembly is heated through the built-in coal economizer, the flue gas is subjected to denitration treatment through the SCR denitration device installed in the flue gas pipeline, the driving motor works, and the motor drives the gear to rotate slowly, therefore, the rotary spraying disc is driven to rotate in the two sliding rails, then the medicament is conveyed into the containing groove in the rotary spraying disc through the conveying pipe, and the medicament is conveyed into a flue gas pipeline through a plurality of discharging heads installed on the rotary spraying disc.
Description
technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to a subcritical coal-fired boiler full-load denitrification system. Background technique [0002] In recent years, in order to reduce air pollution and improve air quality, the country has become more and more stringent on pollution discharge requirements, and the standards are getting higher and higher. [0003] In response to national policy requirements, most of the domestic active coal-fired power plants have completed the transformation of flue gas denitrification devices, and most power plants adopt the Selective Catalytic Reduction (SCR) denitrification process. The SCR denitration process has strict requirements on the flue gas temperature. When the gas temperature is higher than 420°C, the sintering of the denitrification catalyst will fail, and when the flue gas temperature is lower than 310°C, in addition to reducing the denitrification efficiency, the a...
Claims
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IPC IPC(8): B01D53/86B01D53/56B01D53/90F23J15/00F23J15/04F23J15/08
CPCB01D53/8625B01D53/90B01D53/8696F23J15/003F23J15/006F23J15/04F23J15/08B01D2258/0283F23J2219/10F23J2215/10
Inventor冯建光徐浩淞余长开张勇唐荣富董星辰谭永嘉肖礼廖开友
OwnerHUANENG CHONGQING LUOWEN POWER CO LTD