CN209974511U

CN209974511U - Desulfurization water zero release comprehensive utilization device

Info

Publication number: CN209974511U
Application number: CN201920447879.2U
Authority: CN
Inventors: 郭新忠; 王玉康; 李伟; 赵晓萍; 曹战龙
Original assignee: DONGYING HUATAI CHEMICAL GROUP Co Ltd
Current assignee: DONGYING HUATAI CHEMICAL GROUP Co Ltd
Priority date: 2019-04-04
Filing date: 2019-04-04
Publication date: 2020-01-21
Anticipated expiration: 2029-04-04

Abstract

The utility model provides a desulfurization water zero release comprehensive utilization device. The technical scheme is as follows: waste water sedimentation tank (5) one side pipeline connection waste water filtering ponds (6) one side, the common pipeline connection lime-ash calandria (8) in waste water sedimentation tank (5) and waste water filtering ponds (6) bottom, waste water filtering ponds (6) opposite side pipeline connection receive filter membrane filter (9), receive filter membrane filter (9) bottom pipeline connection clear liquid one pipe (10), receive filter membrane filter (9) top pipeline connection tee bend lower extreme, tee bend left end pipeline connection sulphuric acid input pipe (4), tee bend upper end pipeline connection sulfur dioxide rectifier (1) left side upper portion. The utility model discloses beneficial effect: reasonable in design is practical, through filtering, concentration, desorption, retrieve the sulfur dioxide in the desulfurization waste water, reaches the purpose of getting rid of solid matter, impurity ion etc. in the desulfurization waste water, reaches the cyclic utilization of resource.

Description

Desulfurization water zero release comprehensive utilization device

Technical Field

The utility model belongs to the technical field of thermoelectric desulfurization waste water comprehensive utilization technique and specifically relates to a desulfurization water zero release comprehensive utilization device.

Background

The coal-fired boiler inevitably produces sulfur dioxide in the production process, and with the enhancement of environmental protection supervision, this part of sulfur dioxide must be got rid of from the flue gas to inevitably produce a large amount of desulfurization waste water, in the in-process of handling desulfurization waste water, can produce a large amount of solid waste residue, and contain a large amount of sulfite in the solid waste residue, can release a large amount of sulfur dioxide again under acid and the condition of morals and manners, form secondary pollution. And the existence of the desulfurization waste water can cause a series of problems of blockage of sewage treatment equipment, killing of sewage treatment active bacteria, excessive COD (chemical oxygen demand) of discharged sewage and the like, the sewage treatment effect is seriously influenced, and certain difficulty is caused for the waste water treatment. Therefore, a modified process is developed, the generated sulfur dioxide can be recycled, and the generated wastewater is treated and then used for preparing pure water in a system, so that resources are recycled, and the environmental protection problem caused by desulfurization is well solved.

Disclosure of Invention

The utility model provides a desulfurization water zero release comprehensive utilization device that aim at waste water zero release was handled. The technical scheme is as follows: one side of the wastewater sedimentation tank is connected with one side of the wastewater filtering tank through a pipeline, the bottoms of the wastewater sedimentation tank and the wastewater filtering tank are jointly connected with an ash residue discharge pipe through a pipeline, the other side of the wastewater filtering tank is connected with a nanofiltration membrane filter through a pipeline, the bottom of the nanofiltration membrane filter is connected with a first clear liquid pipe, the top of the nanofiltration membrane filter is connected with the lower end of a tee, the left end of the tee is connected with a sulfuric acid input pipe through a pipeline, the upper end of the tee is connected with the upper part of the left side of a sulfur dioxide rectifier, the top of the sulfur dioxide rectifier is connected with the lower part of the left side of a sulfur dioxide absorption reactor through a pipeline, the upper part of the right side of the sulfur dioxide absorption reactor is connected with a sodium hydroxide input pipe, the lower part, the pipeline at the bottom of the freezing sulfate radical removal reaction tank is connected with a mirabilite output pipe 13.

The utility model discloses beneficial effect: reasonable in design is practical, through filtering, concentration, desorption, retrieve the sulfur dioxide in the desulfurization waste water, reaches the purpose of getting rid of solid, impurity ion etc. in the desulfurization waste water, and sulfur dioxide generates sodium sulfite and is used for production, forms the glauber's salt after the sodium sulfate is concentrated, is used for the pure water preparation system after the waste water gets rid of impurity, reaches the cyclic utilization of resource, has reduced manufacturing cost, has improved economic benefits, does benefit to the chemical industry enterprise and widelys popularize.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

As shown in fig. 1, a desulfurization water zero-discharge comprehensive utilization device mainly comprises a sulfur dioxide rectifier 1, a sulfur dioxide absorption reactor 2, a sodium hydroxide input pipe 3, a sulfuric acid input pipe 4, a wastewater sedimentation tank 5, a wastewater filtration tank 6, a sodium sulfite output pipe 7, an ash residue discharge pipe 8, a nanofiltration membrane filter 9, a first clear liquid pipe 10, an extracting solution pipe 11, a freezing sulfate radical removal reaction tank 12, a mirabilite output pipe 13 and a second clear liquid pipe 14. The pipeline at one side of the wastewater sedimentation tank 5 is connected with one side of the wastewater filtering tank 6, the common pipeline at the bottoms of the wastewater sedimentation tank 5 and the wastewater filtering tank 6 is connected with an ash residue discharge pipe 8, and ash residues are collected through the ash residue discharge pipe 8 for sale. The other side of the wastewater filtering pool 6 is connected with a nanofiltration membrane filter 9 through a pipeline, the bottom of the nanofiltration membrane filter 9 is connected with a first clear liquid pipe 10 through a pipeline, and the first clear liquid pipe 10 recovers the clear liquid to prepare pure water. The top pipeline of the nanofiltration membrane filter 9 is connected with the lower end of a tee joint, the left end pipeline of the tee joint is connected with a sulfuric acid input pipe 4, the upper end pipeline of the tee joint is connected with the upper part of the left side of a sulfur dioxide rectifier 1, the top pipeline of the sulfur dioxide rectifier 1 is connected with the lower part of the left side of a sulfur dioxide absorption reactor 2, the upper part pipeline of the right side of the sulfur dioxide absorption reactor 2 is connected with a sodium hydroxide input pipe 3, the lower part pipeline of the right side of the sulfur dioxide absorption reactor 2 is connected with a sodium sulfite output pipe. The bottom end of the sulfur dioxide rectifier 1 is connected with the left side of a freezing sulfate radical removal reaction tank 12 through a connecting extraction liquid pipe 11, a pipeline on the right side of the freezing sulfate radical removal reaction tank 12 is connected with a clear liquid second pipe 14, and the clear liquid is recycled to the pure water preparation through the clear liquid second pipe 14. The pipeline at the bottom of the freezing sulfate radical removal reaction tank 12 is connected with a mirabilite output pipe 13, and mirabilite is collected for sale.

The utility model discloses an use:

the novel process equipment is provided, the aim of removing solid matters, impurity ions and the like in the desulfurization wastewater is achieved by filtering, concentrating, desorbing and recycling the sulfur dioxide in the desulfurization wastewater, the sulfur dioxide is generated into sodium sulfite for production, the sodium sulfate is concentrated to form mirabilite 13, the wastewater is used for a pure water preparation system after impurities are removed, the cyclic utilization of resources is achieved, the production cost is reduced, and the economic benefit is improved.

The desulfurization water gets into confined container after coming out from the desulfurizing tower, according to the PH value of index adjustment desulfurization water, when sodium sulfite content reached more than 9%, after preliminary treatment waste water sedimentation tank 5 and waste water filtering ponds 6 filter, reentrant receive filter membrane filter 9, concentrate desulfurization water in receiving filter membrane filter 9, the concentrate is direct to be carried light salt solution dechlorination process, retrieves the pure water preparation with the clear liquid through a clear liquid pipe 10. Compared with the method of precipitating sulfite ions by using a calcium chloride solution, the method saves the investment in one-time investment and the subsequent operation cost, and generates great economic benefit. Meanwhile, the purchasing amount of sodium sulfite is reduced, a large amount of desulfurization wastewater is recycled (the amount of the desulfurization wastewater in one day is at least over 600), and the method has high environmental protection and economic benefits.

Claims

1. The utility model provides a desulfurization water zero release comprehensive utilization device which characterized in that: one side of the wastewater sedimentation tank (5) is connected with one side of the wastewater filtering tank (6) through a pipeline, the bottoms of the wastewater sedimentation tank (5) and the wastewater filtering tank (6) are connected with an ash residue discharge pipe (8) through a common pipeline, the other side of the wastewater filtering tank (6) is connected with a nanofiltration membrane filter (9), the bottom of the nanofiltration membrane filter (9) is connected with a clear liquid pipe (10) through a pipeline, the top of the nanofiltration membrane filter (9) is connected with the lower end of a tee joint through a pipeline, the left end of the tee joint is connected with a sulfuric acid input pipe (4), the upper end of the tee joint is connected with the upper part of the left side of a sulfur dioxide rectifier (1), the top end of the sulfur dioxide rectifier (1) is connected with the lower part of the left side of a sulfur dioxide absorption reactor (2) through a pipeline, the upper, the bottom end of the sulfur dioxide rectifier (1) is connected with the left side of a freezing sulfate radical removal reaction tank (12) through a connecting extraction liquid pipe (11), the right side pipeline of the freezing sulfate radical removal reaction tank (12) is connected with a clear liquid second pipe (14), and the bottom pipeline of the freezing sulfate radical removal reaction tank (12) is connected with a mirabilite output pipe (13).