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High-efficiency method and device for producing sulfuric acid from desulfurization waste liquid in coking plant

A technology for desulfurization waste liquid and sulfuric acid production, which is applied in chemical instruments and methods, steam generation methods using heat carriers, separation methods, etc., and can solve certain difficulties in adjusting the combustion process, low heat energy utilization efficiency, and by-product dilute sulfuric acid solution. Inability to digest problems internally, to achieve the effect of resource treatment and environmental protection benefits, reducing investment and land use, and reducing energy consumption

Active Publication Date: 2022-03-01
山东绿知源环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency method and device for producing sulfuric acid from desulfurization waste liquid in coking plants, so as to solve the problems in the prior art that the utilization efficiency of heat energy is low, the adjustment of the combustion process is difficult, and the by-product dilute sulfuric acid solution cannot be digested internally. technical problem

Method used

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  • High-efficiency method and device for producing sulfuric acid from desulfurization waste liquid in coking plant
  • High-efficiency method and device for producing sulfuric acid from desulfurization waste liquid in coking plant
  • High-efficiency method and device for producing sulfuric acid from desulfurization waste liquid in coking plant

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Experimental program
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Effect test

Embodiment 1

[0058] The working steps of a device for producing sulfuric acid from desulfurization waste liquid in a coking plant:

[0059] S1: Pressure filtration, the desulfurization waste liquid and sulfur foam produced by the ammonia gas desulfurization of the coking plant are sent through the pipeline to the high-efficiency filter press 1 for separation to obtain sulfur paste and separated clear liquid;

[0060] S2: Concentration, introducing the separated liquid described in S1 into the multi-effect evaporator 2, through the multi-effect evaporator 2, the separated liquid is concentrated into sulfur slurry;

[0061] S3: incineration, the sulfur paste obtained in S1 and the sulfur slurry obtained in S2 are sent to the incinerator 3 through the screw feeder 10 and the pipeline respectively, and are burnt in zones in the incinerator 3 to generate sulfur dioxide flue gas;

[0062] S4: Dust removal and cooling, the sulfur dioxide flue gas from the incinerator 3 is first dedusted by the hi...

Embodiment 2

[0071] The working steps of a device for producing sulfuric acid from desulfurization waste liquid in a coking plant:

[0072] S1: Pressure filtration, the desulfurization waste liquid and sulfur foam produced by the ammonia gas desulfurization of the coking plant are sent through the pipeline to the high-efficiency filter press 1 for separation to obtain sulfur paste and separated clear liquid;

[0073] S2: Concentration, introducing the separated liquid described in S1 into the multi-effect evaporator 2, through the multi-effect evaporator 2, the separated liquid is concentrated into sulfur slurry;

[0074] S3: incineration, the sulfur paste obtained in S1 and the sulfur slurry obtained in S2 are sent to the incinerator 3 through the screw feeder 10 and the pipeline respectively, and are burnt in zones in the incinerator 3 to generate sulfur dioxide flue gas;

[0075] S4: Dust removal and cooling, the sulfur dioxide flue gas from the incinerator 3 is first dedusted by the hi...

Embodiment 3

[0084] The working steps of a device for producing sulfuric acid from desulfurization waste liquid in a coking plant:

[0085] S1: Pressure filtration, the desulfurization waste liquid and sulfur foam produced by the ammonia gas desulfurization of the coking plant are sent through the pipeline to the high-efficiency filter press 1 for separation to obtain sulfur paste and separated clear liquid;

[0086] S2: Concentration, introducing the separated liquid described in S1 into the multi-effect evaporator 2, through the multi-effect evaporator 2, the separated liquid is concentrated into sulfur slurry;

[0087] S3: incineration, the sulfur paste obtained in S1 and the sulfur slurry obtained in S2 are sent to the incinerator 3 through the screw feeder 10 and the pipeline respectively, and are burnt in zones in the incinerator 3 to generate sulfur dioxide flue gas;

[0088] S4: Dust removal and cooling, the sulfur dioxide flue gas from the incinerator 3 is first dedusted by the hi...

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Abstract

The invention discloses a method and device for producing sulfuric acid from desulfurization waste liquid in a coking plant, and relates to the field of industrial wastewater treatment. The working method is: S1: centrifugation; centrifuging the desulfurization waste liquid and sulfur foam to obtain sulfur paste and separated clear liquid ;S2: Concentration; the separated supernatant is concentrated to obtain sulfur slurry; S3: Incineration; sulfur paste and sulfur slurry are burned in separate areas; S4: Dust removal and cooling; Gas removal, dehumidification, and dehydration; dilute sulfuric acid is produced as a by-product; S6: Tail gas recovery: the treated sulfur dioxide gas is made into industrial sulfuric acid, and returned to the deamination system of the coking plant to remove ammonia in coke oven gas and make ammonium sulfate ; S7: recovery of by-products; the dilute sulfuric acid concentrate obtained in S3 is neutralized with dilute ammonia water, filtered, concentrated to obtain an ammonium sulfate solution, and the separated clear liquid is recovered. The invention is an upgrade of the sulfuric acid production technology from desulfurization waste liquid and sulfur foam, and thoroughly solves the problems of high efficiency, energy saving and environmental protection.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a high-efficiency method and device for producing sulfuric acid from desulfurization waste liquid of a coking plant. Background technique [0002] In coking plant desulfurization waste liquid and sulfuric acid foam technology, the current representative ones are wet process and dry process. The main feature of the wet process is that the desulfurization waste liquid and sulfur foam are mixed into a slurry with a water content of about 55%-65% after pretreatment and sprayed into the horizontal incinerator for combustion. The main feature of the dry process is that the desulfurization waste liquid and sulfur foam are After pretreatment, it is dried into a solid mixture (with a water content of 3%-5%) and sent to a vertical incinerator for combustion. Both processes need to provide an external heat source to evaporate the water in the solution, and the heat energy uti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/765C01B17/80C01B17/54C01B17/56C01B17/02C01C1/242C02F9/10B01D50/20F22B1/16C02F103/18
CPCC01B17/765C01B17/80C01B17/54C01B17/56C01B17/0205C01B17/0243C01C1/242C02F1/001C02F1/04B01D50/00F22B1/16C02F2103/18Y02P20/10Y02P20/129
Inventor 孟昭颂宋伯苍尹建斌王玉衡
Owner 山东绿知源环保工程有限公司
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