Optimized denitration, deacidification and dust removal integrated method for household garbage incineration flue gas
A technology for domestic waste incineration and nitric deacidification, which is applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of high investment and operation cost, low overall investment cost, large amount of wastewater treatment, etc. Simple, increased investment cost, low operating cost
Pending Publication Date: 2022-05-10
WUHAN LONGKING ENVIRONMENTAL PROTECTION CO LTD
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[0006] The purpose of the present invention is to provide an optimized integrated method for denitrification, deacidification and dust removal of domestic waste incineration flue gas, which has no white plume, no waste water generation, no catalyst consumption, low overall investment cost, and low energy consumption of the system; There are problems such as large water consumption, large amount of wastewater treatment, white smoke plume and other problems in the wet desulfurization technology used in the flue gas treatment process of domestic waste incineration, and the high investment and operation cost of catalysts using SCR denitrification technology
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[0102] Taking a 500t / d garbage power plant in Zhejiang as an example, under the premise of ensuring that the pollutant concentration at the discharge port meets the relevant requirements, the consumption of slaked lime is about 520kg / h, and the consumption of 30% NaOH solution is about 25.22kg / h. The present invention is used to optimize its complicated flue gas deacidification system (SDA semi-dry method+dry method+wet method tower deacidification), and the specific optimization method is as follows: an alkali injection system is added on the SDA tower (only a certain amount needs to be increased) double-fluid spray gun, the equipment cost for transformation is negligible), and the wet deacidification system is directly bypassed; the lye preparation and delivery system in the wet deacidification system need to continue to be put into operation, and the optimized deacidification process becomes the present invention The SDA semi-dry process + lye spray deacidification + dry pro...
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The invention discloses an optimized denitration, deacidification and dust removal integrated method for household garbage incineration flue gas. The method comprises the following steps that 1, raw flue gas enters a raw flue gas pipeline under the action of a tail end induced draft fan; 2, atomizing the NaClO2 solution, and feeding the atomized NaClO2 solution into an aerial fog adding and uniform distribution area; 3, in the NaClO2 aerial fog adding and uniform distribution area, NO is oxidized into high-valence-state nitric oxide through the NaClO2 aerial fog and the flue gas; 4, absorbing and deacidifying the slaked lime slurry; step 5, absorbing and deacidifying with a NaOH solution; step 6, discharging one part of solid by-products generated by reaction in the SDA tower body through an ash hopper at the bottom of the SDA tower, and enabling the other part of the solid by-products to enter a downstream flue along with flue gas through a flue gas outlet of the SDA tower; and 7, purifying the flue gas subjected to dust removal by the dust removal system to reach the standard, and discharging the flue gas from a chimney. The method has the advantages of no white smoke plume, no wastewater generation, no catalyst consumption, low overall investment cost and low system energy consumption.
Description
technical field [0001] The invention relates to the technical field of flue gas treatment, and more specifically relates to an optimized integrated method for denitrification, deacidification, and dust removal of domestic waste incineration flue gas. Background technique [0002] Coal-fired power plants have undergone "ultra-low emission" transformation, and the emission reduction effect of flue gas pollutants is remarkable, setting a model for other non-electric industries to try "ultra-low emission" flue gas treatment. For example, in the field of solid waste, some provinces and cities (such as Shanghai, Shenzhen, Zhejiang, Hainan, etc., especially Zhejiang) have issued corresponding local standards for the emission limits of domestic waste incineration, which are higher than national standards or EU standards. Higher, requiring ultra-low emission standards (that is, emission limits SO 2 ≤35mg / m 3 , NOx≤50mg / m3, smoke and dust≤5mg / m 3 ). [0003] In terms of deacidific...
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Login to View More IPC IPC(8): B01D53/75B01D53/76B01D53/78B01D53/80B01D53/56B01D53/50B01D53/68B01D50/60
CPCB01D53/75B01D53/76B01D53/78B01D53/80B01D53/56B01D53/502B01D53/68B01D2258/0283
Inventor 朱翔关霜李静李力刘荆涵方攀黄杨
Owner WUHAN LONGKING ENVIRONMENTAL PROTECTION CO LTD