A turbulent jet coupled integrated flue gas purification process for complex and difficult-to-treat flue gas

A flue gas purification process and difficult-to-handle technology, which is applied in the direction of gas treatment, combined devices, chemical instruments and methods, etc., can solve difficult problems and achieve the effects of high purification intensity, low investment, and equipment investment

Active Publication Date: 2021-01-26
双盾环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Cleaning, purification and dust removal of flue gas emitted by various kilns, target components (such as common SO 2 , HF, HCl, NOx, H 2 The removal and recovery of S gas, etc.) has always been an important process unit of flue gas cleaning treatment, and there are many methods: such as empty tower washing and purification, packed tower washing and purification, sieve plate tower washing and purification, turbulent ball tower washing and purification, dynamic wave washing and purification , Venturi tube washing and purification, etc., but for the complex and high-concentration dust-containing particles that are difficult to deal with, the combination of multiple methods is required, and the one-step method of thorough purification has always been difficult

Method used

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  • A turbulent jet coupled integrated flue gas purification process for complex and difficult-to-treat flue gas

Examples

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Effect test

Embodiment 1

[0035] A Kaldor furnace processes 5,000 tons of precious metal anode slime per year, and the flue gas volume is 7,000-10,000m 3 / h, the flue gas contains 15g / m of powder such as lead oxide, selenium oxide, and Glauber's salt 3 ~40g / m 3 , the flue gas inlet temperature is 300-600°C, the SO in the flue gas 2 Content 31500mg / Nm 3 And a small amount of HF, HCl, NOx, H 2 Se, etc. need to be purified and absorbed. The annular overflow weir 2 is equipped with a water curtain to protect the inner wall of the smoke pipe. The high-temperature flue gas enters the turbulent washing section 3 through the annular overflow weir 2, where it is sprayed with the washing and absorbing liquid sent by the circulating pump 12 through the large-opening turbulent nozzle 4. The flue gas and the washing and absorbing liquid form a suspended dynamic foam area, where the gas-liquid two-phase contact is intense to complete the adsorption absorption and adiabatic evaporation process, and the gas-liquid...

Embodiment 2

[0039] A pyrite acid plant with an annual output of 400,000 tons has a flue gas volume of 115,000m from the boiler and multi-tube dust collector 3 / h, containing iron oxide, silicon oxide, calcium oxide, aluminum oxide, magnesium oxide and other dust 15g / m 3 ~20g / m 3 , the flue gas inlet temperature is 300-360°C, the flue gas SO 2 The content is 11%, and the flue gas contains a small amount of HF, HCl, SO 3 It needs to be purified and absorbed. The annular overflow weir 2 is equipped with a water curtain to protect the inner wall of the smoke pipe. The high-temperature flue gas enters the turbulent washing section 3 through the annular overflow weir 2, where it is sprayed with the washing and absorbing liquid sent by the circulating pump 12 through the large-opening turbulent nozzle 4. The flue gas and the washing and absorbing liquid form a suspended dynamic foam area, where the gas-liquid two-phase contact is intense to complete the adsorption absorption and adiabatic eva...

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Abstract

The invention discloses a turbulent jet coupling integrated flue gas purification process for complicated and difficult-to-treat flue gas. The steps are as follows: a. The flue gas to be treated is vertically sent to the turbulent washing section through the flue; b. The turbulent nozzle The washing and absorbing liquid is sprayed from bottom to top and collides with the flue gas flowing from top to bottom at high speed to collect dust and dissolve and absorb target components; c. The flue gas treated in the turbulent washing section continues to enter the scaling injection section downwards Fully collide with the washing and absorbing liquid at the constriction of the zooming injection section to trap micron and submicron dust and further dissolve and absorb the target components; d. Flue gas and its entrained droplets after being processed by the zooming injection section After continuing to enter the gas-liquid separator to separate part of the liquid droplets, the flue gas is discharged from the top of the gas-liquid separator. Compared with the conventional process, the process of the present invention saves energy by more than 30%, saves equipment investment by more than 35%, saves more than 40% of land occupation, and increases the dust removal and washing efficiency by more than 5% to 20%.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to the purification, washing, absorption and environmental protection treatment of various types of fuel, smelting and heating kiln flue gas, specifically a method for removing particles or heavy metals in flue gas, removing The turbulent jet coupling integrated flue gas purification process of the target components in the flue gas, especially the complex and refractory flue gas that can exert a good effect on the removal of high-concentration and complex fine particles. Background technique [0002] Cleaning, purification and dust removal of flue gas emitted by various kilns, target components (such as common SO 2 , HF, HCl, NOx, H 2 The removal and recovery of S gas, etc.) has always been an important process unit of flue gas cleaning treatment, and there are many methods: such as empty tower washing and purification, packed tower washing and purification, sieve plate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D47/06B01D50/00B01D53/18
CPCB01D47/06B01D50/00B01D53/1456B01D53/1468B01D53/1481B01D53/18B01D2257/2045B01D2257/2047B01D2257/40B01D2258/0283
Inventor 宋小良徐光泽
Owner 双盾环境科技有限公司
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