Method of using sodium bicarbonate for deacidifying incineration flue gas and realizing zero discharge of sewage

A technology for incinerating flue gas and baking soda, which is applied in separation methods, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of high-salt wastewater sprayed into the quench tower to accumulate salt, affecting the stable production of the process, etc., to solve the problem of wastewater Dispose of problems, improve production economic benefits, and achieve the effect of zero discharge of wastewater

Active Publication Date: 2019-10-11
潍坊帕尔曼粉体设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method to improve the effect of dry deacidification, reduce operating costs, solve the problem of high-salt wastewater sprayed into the quench tower to accumulate salt and affect the stable production of the process, and realize the zero discharge of sewage from the incineration system Baking soda is used for deacidification of incineration flue gas and method for realizing zero discharge of sewage

Method used

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  • Method of using sodium bicarbonate for deacidifying incineration flue gas and realizing zero discharge of sewage
  • Method of using sodium bicarbonate for deacidifying incineration flue gas and realizing zero discharge of sewage
  • Method of using sodium bicarbonate for deacidifying incineration flue gas and realizing zero discharge of sewage

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Embodiment 1

[0053] A method for using baking soda to deacidify incineration flue gas and realize zero discharge of sewage, comprising steps:

[0054] After the high-temperature flue gas enters the quenching tower, the temperature suddenly drops below 200°C under the action of water or brine. Discharge after the dust collector.

[0055] The ground baking soda is ground to 20 μm baking soda powder by an air grinder, and sprayed quantitatively and timely into the flue gas according to the requirements of working conditions.

[0056] Described incineration flue gas comprises the steps:

[0057] 1) When the high-temperature flue gas has no waste heat boiler, the cooling tower is used to cool the flue gas to above 500°C;

[0058] 2) The flue gas is rapidly cooled to below 200°C;

[0059] 3) The air grinder grinds the baking soda;

[0060] 4) Baking soda dry deacidification;

[0061] 5) Activated carbon adsorption;

[0062] 6) Filter dust removal;

[0063] 7) Step 4)-Step 6) are combined ...

Embodiment 2

[0067] A method for using baking soda to deacidify incineration flue gas and realize zero discharge of sewage, comprising steps:

[0068] After the high-temperature flue gas enters the quench tower, the temperature suddenly drops below 200°C under the action of water or salt water. At this time, the ground sodium bicarbonate is sprayed in time for deacidification. When the high-salt wastewater is produced by deacidification method, and it is difficult to discharge the high-salt wastewater into the sewage treatment plant and the environment, a salt inhibitor is added to the high-salt wastewater, and after mixing evenly, the uniformly mixed high-salt wastewater is sprayed back into the Quenching tower.

[0069] The ground baking soda is ground to 20 μm baking soda powder by an air grinder, and sprayed quantitatively and timely into the flue gas according to the requirements of working conditions.

[0070] Described incineration flue gas comprises the steps:

[0071] 1) When th...

Embodiment 3

[0091] A method for using baking soda to deacidify incineration flue gas and realize zero discharge of sewage, comprising steps:

[0092] After the high-temperature flue gas enters the quenching tower, the temperature suddenly drops below 200°C under the action of water or salt water, and when the high-salt wastewater is difficult to discharge into the sewage treatment plant and the environment, a salt inhibitor is added to the high-salt wastewater and mixed After uniformity, the homogeneously mixed high-salt wastewater is sprayed back into the quenching tower, and at this time, the ground sodium bicarbonate is sprayed in time for deacidification.

[0093] The ground baking soda is ground to 20 μm baking soda powder by an air grinder, and sprayed quantitatively and timely into the flue gas according to the requirements of working conditions.

[0094] Described incineration flue gas comprises the steps:

[0095] 1) When the high-temperature flue gas has no waste heat boiler, t...

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Abstract

The invention discloses a method of using sodium bicarbonate for deacidifying incineration flue gas and realizing zero discharge of sewage. The method comprises the steps that after high-temperature flue gas enters a quenching tower, the temperature is suddenly lowered to 200 DEG C or below under the action of water or salt-containing water, at that moment, ground sodium bicarbonate is timely sprayed for deacidification, and the salt-containing wastewater or other wastewater subjected to wet deacidification is sprayed back into the quenching tower. The flue gas is subjected to dry deacidification, sodium bicarbonate is used for replacing slaked lime, the deacidification efficiency is improved, and the operation cost is reduced; when the flue gas contains a large number of acids, wet deacidification is carried out, and by introducing a salt inhibitor, the problems are solved that after high-salt wastewater is sprayed into the quenching tower, salts are accumulated and stable productionis thus influenced; zero discharge of sewage in an incineration system is realized.

Description

technical field [0001] The invention relates to the technical field of disposal of saline wastewater in an incineration system, in particular to a method for using baking soda to deacidify incineration flue gas and realize zero discharge of sewage. Background technique [0002] A large amount of flue gas is produced in the process of material incineration, and the flue gas contains acid elements such as halogen and sulfur. 2 ) as dry deacidification + wet deacidification (dissolving sodium hydroxide or sodium carbonate in water) improves the deacidification efficiency and greatly reduces the discharge of deacidification wastewater. [0003] When salty wastewater is sprayed into the quench tower, the salt will adhere to the inner wall, bottom and flue gas outlet of the quench tower. As a result, the internal flow field of the quench tower is disordered, water dripping at the bottom of the tower, and even the flue gas outlet becomes smaller, which affects the operation of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/40B01D53/00C02F9/10C02F103/18
CPCB01D53/75B01D53/40C02F2103/18B01D2258/0283C02F1/58B01D53/83B01D53/04F23J15/08F23J15/02F23J15/04B01D2251/404Y02E20/30
Inventor 许亮胡新民
Owner 潍坊帕尔曼粉体设备有限公司
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