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Vacuum potassium carbonate desulfurization liquid waste treatment technology and device

A technology of vacuum potassium carbonate and desulfurization waste liquid, which is applied in gaseous discharge wastewater treatment, dehydration/drying/concentrated sludge treatment, water/sewage multi-stage treatment, etc., which can solve the problem of lack of effective treatment technology for waste liquid.

Active Publication Date: 2013-11-20
BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a harmless treatment method for coke oven gas vacuum potassium carbonate desulfurization waste liquid, which can economically, reasonably and thoroughly remove the toxic components sulfide and cyanide in the vacuum potassium carbonate desulfurization waste liquid. compounds to solve the problem of the lack of effective treatment technology for the waste liquid

Method used

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  • Vacuum potassium carbonate desulfurization liquid waste treatment technology and device
  • Vacuum potassium carbonate desulfurization liquid waste treatment technology and device
  • Vacuum potassium carbonate desulfurization liquid waste treatment technology and device

Examples

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Embodiment 1

[0055] A device for the treatment process of vacuum potassium carbonate desulfurization waste liquid, the device comprises a regulating tank 1, a desulfurization and decyanation reaction tank 2, a primary sedimentation tank 3, a deep decyanation reaction tank 4, a secondary sedimentation tank 5 and Out of the pool6.

[0056] The bottoms of the primary settling tank 3 and the secondary settling tank 5 are connected to a sludge thickening tank 7 and a sludge dewatering device 8 . The sludge dewatering device 8 is a belt filter press, a plate and frame filter press or a decanter centrifuge.

[0057] A kind of application above-mentioned device carries out vacuum potassium carbonate desulfurization waste liquid treatment process, comprises the following steps:

[0058] 1) Desulfurization and decyanation: The desulfurization waste liquid homogenized in the adjustment tank 1 reacts with the desulfurization and decyanation agent in the desulfurization and decyanation reaction tank 2...

Embodiment 2

[0064] The processing device of this embodiment is the same as that of Embodiment 1.

[0065] A kind of application above-mentioned device carries out vacuum potassium carbonate desulfurization waste liquid treatment process, comprises the following steps:

[0066] 1) Desulfurization and decyanation: The desulfurization waste liquid homogenized in the adjustment tank 1 reacts with the desulfurization and decyanation agent in the desulfurization and decyanation reaction tank 2 at a stirring speed of 50 rpm at 30°C to remove S 2- and most CN - , generate insoluble solids; the concentration of the desulfurization and decyanation agent is 50kg / m 3 , its volume ratio to desulfurization waste liquid is 1:1;

[0067] 2) Primary mud-water separation: The mud-water mixture in the desulfurization and decyanation reaction tank 2 is passed through the primary sedimentation tank 3 for primary mud-water separation; the bottom sludge is sent to the sludge concentration tank 7; the hydrauli...

Embodiment 3

[0072] The processing device of this embodiment is the same as that of Embodiment 1.

[0073] A kind of application above-mentioned device carries out vacuum potassium carbonate desulfurization waste liquid treatment process, comprises the following steps:

[0074] 1) Desulfurization and decyanation: The desulfurization waste liquid homogenized in the adjustment tank 1 reacts with the desulfurization and decyanation agent in the desulfurization and decyanation reaction tank 2 at a stirring speed of 100rpm at 13°C to remove S 2- and most CN - , generating insoluble solids; the concentration of the desulfurization and decyanation agent is 65kg / m 3 , the volume ratio of it to the desulfurization waste liquid is 1:1.2;

[0075] 2) Primary mud-water separation: The mud-water mixture in the desulfurization and decyanation reaction tank 2 is passed through the primary sedimentation tank 3 for primary mud-water separation; the bottom sludge is sent to the sludge concentration tank 7...

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Abstract

The invention relates to a vacuum potassium carbonate desulfurization liquid waste treatment technology and device. The technology comprises the following steps of: firstly, performing primary mud-water separation on the product of reaction between desulfurization liquid waste and a desulfurization-decyanation agent; reacting the liquid supernatant formed after primary mud-water separation with a high-efficiency decyanation agent to realize deep decyanation; performing secondary mud-water separation; discharging water. The device comprises a desulfurization-decyanation reaction tank, a primary sedimentation basin, a deep decyanation reaction tank, a secondary sedimentation basin and an outlet sump. According to the technology, under the action of chemical sedimentation-absorption, the harmful components in the desulfurization liquid waste are separated, the desulfurization liquid waste is treated to be harmless, and the generated chemical sludge can be treated effectively after being dehydrated and reduced. The technology can respectively reduce the cyanide and the sulfide in the desulfurization liquid waste to less than 50mg / L and less than 10mg / L from 2000-5000mg / L and 1500-3000mg / L.

Description

technical field [0001] The invention belongs to the field of waste liquid treatment, and in particular provides a treatment process and device for desulfurization waste liquid containing high-concentration sulfide and cyanide produced in a coking industry coal gas desulfurization process unit using a vacuum potassium carbonate method. Background technique [0002] The coking industry is an important resource and energy industry in my country, and the recovery of chemical products from coke oven waste gas is an important part of the coking industry. Coke oven raw gas generally contains hydrogen sulfide at 4-8g / m 3 , the ammonia content is 4~9g / m 3 , containing hydrogen cyanide is 0.5 ~ 1.5g / m 3 . Hydrogen sulfide (H 2 S) and its combustion product sulfur dioxide (SO 2 ) are toxic to the human body, and hydrogen cyanide is more toxic; hydrogen cyanide and ammonia generate nitrogen oxides (NO X ). Sulfur dioxide (SO 2 ) and nitrogen oxides (NO X ) are the main substanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F9/14C02F11/12C02F103/18
Inventor 李海波李玉平盛宇星贺荣华刘永胜魏学勇
Owner BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH