CN207738572U - A kind of full flue gas method zero-discharge treatment system of desulfurization wastewater - Google Patents
A kind of full flue gas method zero-discharge treatment system of desulfurization wastewater Download PDFInfo
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- CN207738572U CN207738572U CN201721864236.5U CN201721864236U CN207738572U CN 207738572 U CN207738572 U CN 207738572U CN 201721864236 U CN201721864236 U CN 201721864236U CN 207738572 U CN207738572 U CN 207738572U
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Abstract
The utility model belongs to industrial waste water treatment, disclose a kind of full flue gas method zero-discharge treatment system of desulfurization wastewater, including pre-processing pliable cell, low temperature upgrading unit and flue evaporation element, pretreatment pliable cell is connected to the low temperature upgrading unit, low temperature upgrading unit is connected to flue evaporation element, pretreatment pliable cell and low temperature upgrading unit are connected to the rear end of power plant air preheater, the pretreatment pliable cell is utilized quoted from the carbon dioxide in low-temperature flue gas, the low temperature upgrading unit is utilized quoted from the fume afterheat in low-temperature flue gas, flue evaporation element is connected to the front end of power plant's air preheater, the flue evaporation element utilizes the heat quoted from high-temperature flue gas.The full flue gas method zero-discharge treatment system of desulfurization wastewater provided by the utility model, the waste heat and carbon dioxide in flue gas that can make full use of flue gas handle desulfurization wastewater, it realizes discharge gas recycling and energy regenerating, reduces cost of investment and operation consumes, there is higher practical value.
Description
Technical field
The utility model belongs to industrial waste water treatment, and in particular to a kind of full flue gas method zero-emission of desulfurization wastewater
Processing system.
Background technology
Desulfurization wastewater is that water quality is most complicated in power plant's water system, pollutes the waste water of most serious as power plant's terminal waste water.With
Industry water discharge and processing requirement is gradually increased in the promotion and country for environmental consciousness in recent years, desulfurization wastewater processing
Especially zero discharge treatment is more paid attention to by correlative technology field.
For desulfurization wastewater, traditional waste water treatment process, which generally uses, the technologies such as neutralizes, precipitates, flocculates, clarifies, but still
It faces draining and there are the drawbacks such as amount with high salt, highly corrosive, be a kind of industrial high-salt wastewater, do not met environmental protection gradually and become
Gesture and《Water pollution action plan》Etc. policy requirements.In consideration of it, on the basis of conventional processes, it is proposed that " traditional handicraft+
The Zero-discharge treating process of waste heat evaporation drying, crystallization ", and《Thermal power plant's pollution prevention technique policy》With《Thermal power plant pollutes
Prevent best practicable techniques guide》In require.
From the point of view of existing industrial practice, desulfurization wastewater zero discharge treatment technology has achieved certain achievement and experience,
But all in all, desulfurization wastewater zero discharge treatment technology is still in the research and inquirement stage, main problem be to invest and run at
This is higher, limits the promotion and application of desulfurization wastewater zero-discharge technology.Therefore, desulfuration waste water treatment process cost how is solved
Problem high, investment is more, is those skilled in the art's urgent problem to be solved.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of full flue gas method zero-discharge treatment system of desulfurization wastewater,
The waste heat and carbon dioxide in flue gas that can make full use of flue gas handle desulfurization wastewater, realize discharge gas recycling and
Energy regenerating, reduces cost of investment and operation consumes, and has higher practical value.
To achieve the above object, the utility model provides following scheme：
A kind of full flue gas method zero-discharge treatment system of desulfurization wastewater of the utility model offer, including pretreatment pliable cell,
Low temperature upgrading unit and flue evaporation element, pretreatment pliable cell are connected to the low temperature upgrading unit, low temperature upgrading unit
It is connected to flue evaporation element, pre-processes pliable cell and low temperature upgrading unit and be connected to the rear end of power plant air preheater,
The pretreatment pliable cell is utilized quoted from the carbon dioxide in low-temperature flue gas, and the low temperature upgrading unit is utilized quoted from low temperature cigarette
Fume afterheat in gas, flue evaporation element are connected to the front end of power plant's air preheater, and the flue evaporation element, which utilizes, to be drawn
From the heat of high-temperature flue gas.
Optionally, further include settler and sludge treating block, the settler and the pretreatment pliable cell
Connection, the sludge treating block are connected to the settler.
Optionally, the settler be clarifying basin, separation water outlet and sludge, the sludge that the settler is isolated into
Enter the sludge treating block to be handled, the settler is connected to the low temperature upgrading unit, the settler point
The water separated out enters the low temperature upgrading unit by pipeline.
Optionally, the sludge treating block includes dehydration device, and the dehydration device is plate and frame filter press.
Optionally, it is additionally provided with outer shipping unit, the plate and frame filter press is connected to the outer shipping unit, the plate compression
The filtrate of machine separation returns to the pretreatment pliable cell through piping, and the mud cake of the plate and frame filter press separation is by described outer
Shipping unit is transported outward.
Optionally, it is additionally provided with fresh water reuse unit, the low temperature upgrading unit is connected to the fresh water reuse unit.
The utility model achieves following technique effect compared with the existing technology：
1, the full flue gas method zero-discharge treatment system of sulphur waste water provided by the utility model, can make full use of the waste heat of flue gas
Desulfurization wastewater is handled with carbon dioxide in flue gas, realizes discharge gas recycling and energy regenerating, reduces cost of investment
It is consumed with operation, there is higher practical value.
2, the full flue gas method zero-discharge treatment system of the desulfurization wastewater of the utility model is provided with settler, at outer sludge
Unit, outer shipping unit and fresh water reclamation set are managed, can fully the useful component in waste water be recycled or be disposed, fully
Meet ecological requirements, effectively solves the problems, such as that existing wet desulfurizing process draining no pollution effect is poor, environmental requirement is not up to standard.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is the overall structure diagram of the full flue gas method zero-discharge treatment system of the utility model desulfurization wastewater；
Reference sign：1, pliable cell is pre-processed；2, low temperature upgrading unit；3, flue evaporation element；4, precipitation dress
It sets；5, sludge treating block；6, outer shipping unit；7, fresh water reuse unit.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The purpose of this utility model is to provide a kind of full flue gas method zero-discharge treatment system of desulfurization wastewater, can make full use of
The waste heat and carbon dioxide in flue gas of flue gas handle desulfurization wastewater, realize discharge gas recycling and energy regenerating, drop
Low investment cost and operation consume, and are additionally provided with settler, outer sludge treating block, outer shipping unit and fresh water reclamation set,
Can fully the useful component in waste water be recycled or be disposed, fully meet ecological requirements, effectively solve existing wet method
The sulfur removal technology draining problem that no pollution effect is poor, environmental requirement is not up to standard.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, below in conjunction with the accompanying drawings and have
Body embodiment is described in further detail the utility model.
The present embodiment provides a kind of full flue gas method zero-discharge treatment systems of desulfurization wastewater, as shown in Figure 1, soft including pre-processing
Change unit 1, low temperature upgrading unit 2 and flue evaporation element 3, pretreatment pliable cell 1 is connected to low temperature upgrading unit 2, low temperature
Upgrading unit 2 is connected to flue evaporation element 3, pre-process pliable cell 1 and low temperature upgrading unit 2 with power plant's air preheater
Rear end connection, pretreatment pliable cell 1 using quoted from the carbon dioxide in low-temperature flue gas, low temperature upgrading unit 2 using quoted from
Fume afterheat in low-temperature flue gas, flue evaporation element 3 are connected to the front end of power plant's air preheater, 3 profit of flue evaporation element
With the heat quoted from high-temperature flue gas, desulfurization wastewater is in pretreatment pliable cell 1 using from low temperature cigarette after power plant's air preheater
Carbon dioxide in gas is reacted with the hardness component in waste water, generates precipitable carbonate, realizes desulfurization wastewater softening
Pretreatment, the pretreatment water outlet of pliable cell 1 enter settler 4 and carry out mud-water separation, and supernatant enters low temperature upgrading unit 2,
Wastewater minimisation is concentrated using fume afterheat under low-temperature flue gas effect, obtained fresh water send to reuse unit and carries out reuse, dense
Water is sent to smoke evaporative unit 3；Flue evaporation element 3 will be remained using quoted from the high-temperature flue gas before power plant's air preheater after concentration
Remaining desulfurization wastewater evaporation process is taken away with flue gas after moisture evaporation, and salinity is collected with flying dust, reaches whole zero-emission, can
The waste heat and carbon dioxide in flue gas for making full use of flue gas handle desulfurization wastewater, realize discharge gas recycling and energy
Recycling, reduces cost of investment and operation consumes, and energy conservation and environmental protection meets ecological requirements.
Specifically, in specific embodiment of the utility model, the full flue gas method zero-discharge treatment system of desulfurization wastewater also wraps
Settler 4 and sludge treating block 5 are included, settler 4 is connected to pretreatment pliable cell 1, sludge treating block 5 and precipitation
Device 4 is connected to.
In order to preferably detach water and sludge, settler 4 is clarifying basin, and clarifying basin can detach water outlet and dirt
Mud, the sludge isolated by settler 4 enter sludge treating block 5 and are handled, settler 4 and low temperature upgrading unit
2 connections, the water that settler 4 is isolated enter low temperature upgrading unit 2 by pipeline.
Sludge treating block 5 includes dehydration device, specifically, in specific embodiment of the utility model, dehydration device
It is selected as plate and frame filter press.Plate and frame filter press has filter medium, can be selected as filter cloth, the sludge isolated by settler 4
Filter cloth is flowed through, solid retention is on filter cloth, and gradually accumulation forms filter cake on filter cloth.And filtrate portion then permeation filtration
Cloth becomes the filtrate without solid.
It is additionally provided with outer shipping unit, plate and frame filter press is connected to outer shipping unit 6, and what plate and frame filter press detached is free of solid
Filtrate returns to pretreatment pliable cell 1 through piping, and the filter cake of plate and frame filter press separation is transported outward by outer shipping unit 6
Processing.
In order to further recycle fresh water reuse list can be additionally provided in specific embodiment of the utility model with material
Member 7, low temperature upgrading unit 2 is connected to fresh water reuse unit 7.It is using fume afterheat that wastewater minimisation is dense under low-temperature flue gas effect
Contracting, obtained fresh water send to fresh water reuse unit 7 and carry out reuse, and concentrated water is sent to smoke evaporative unit 3 and carries out subsequent processing.
Smoke evaporative unit utilizes remaining desulfurization wastewater evaporated after being concentrated quoted from the high-temperature flue gas before power plant's air preheater
It manages, is taken away with flue gas after moisture evaporation, salinity reaches whole zero-emission with flying dust Collection utilization.
It can be seen that the full flue gas method zero-discharge treatment system of desulfurization wastewater provided by the utility model, can make full use of
The waste heat and carbon dioxide in flue gas of flue gas handle desulfurization wastewater, realize discharge gas recycling and energy regenerating, drop
Low investment cost and operation consume, and are additionally provided with settler, outer sludge treating block, outer shipping unit and fresh water reclamation set,
Can fully the useful component in waste water be recycled or be disposed, fully meet ecological requirements, effectively solve existing wet method
The sulfur removal technology draining problem that no pollution effect is poor, environmental requirement is not up to standard.
It should be noted that the settler of the utility model is not limited to clarifying basin, it can also be separable for other
The separator of water and sludge, sludge treating block are also not limited to plate and frame filter press, can also be other can dehydrated structure, mistake
Filter medium is also not limited to filter cloth, can be carried out suitably adjusting and choosing according to actual use demand.
It applies specific case in this specification to be expounded the principles of the present invention and embodiment, the above reality
The explanation for applying example is merely used to help understand the method and its core concept of the utility model；Meanwhile for the general of this field
Technical staff, according to the thought of the utility model, there will be changes in the specific implementation manner and application range.To sum up institute
It states, the content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. a kind of full flue gas method zero-discharge treatment system of desulfurization wastewater, it is characterised in that：Including pretreatment pliable cell (1), low
Warm upgrading unit (2) and flue evaporation element (3), the pretreatment pliable cell (1) connect with the low temperature upgrading unit (2)
Logical, the low temperature upgrading unit (2) is connected to the flue evaporation element (3), the pretreatment pliable cell (1) and described low
Warm upgrading unit (2) is connected to the rear end of power plant air preheater, and the pretreatment pliable cell (1) is using quoted from low temperature cigarette
Carbon dioxide in gas, for the low temperature upgrading unit (2) using quoted from the fume afterheat in low-temperature flue gas, the flue evaporation is single
First (3) are connected to the front end of power plant's air preheater, and the flue evaporation element (3) utilizes the heat quoted from high-temperature flue gas
Amount.
2. the full flue gas method zero-discharge treatment system of desulfurization wastewater according to claim 1, it is characterised in that：It further include precipitation
Device (4) and sludge treating block (5), the settler (4) are connected to the pretreatment pliable cell (1), the sludge
Processing unit (5) is connected to the settler (4).
3. the full flue gas method zero-discharge treatment system of desulfurization wastewater according to claim 2, it is characterised in that：The precipitation dress
It is clarifying basin to set (4), and separation water outlet and sludge, the sludge that the settler (4) is isolated enter the sludge treating block
(5) it is handled, the settler (4) is connected to the low temperature upgrading unit (2), what the settler (4) was isolated
Water enters the low temperature upgrading unit (2) by pipeline.
4. the full flue gas method zero-discharge treatment system of desulfurization wastewater according to claim 3, it is characterised in that：At the sludge
It includes dehydration device to manage unit (5), and the dehydration device is plate and frame filter press.
5. the full flue gas method zero-discharge treatment system of desulfurization wastewater according to claim 4, it is characterised in that：It is additionally provided with outer
Shipping unit (6), the plate and frame filter press are connected to the outer shipping unit (6), and the filtrate of the plate and frame filter press separation is by pipe
Road returns to the pretreatment pliable cell (1), and the mud cake of the plate and frame filter press separation is by outer shipping unit (6) outward transport.
6. the full flue gas method zero-discharge treatment system of desulfurization wastewater according to claim 5, it is characterised in that：It is additionally provided with light
Water reuse unit (7), the low temperature upgrading unit (2) are connected to the fresh water reuse unit (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721864236.5U CN207738572U (en) | 2017-12-27 | 2017-12-27 | A kind of full flue gas method zero-discharge treatment system of desulfurization wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721864236.5U CN207738572U (en) | 2017-12-27 | 2017-12-27 | A kind of full flue gas method zero-discharge treatment system of desulfurization wastewater |
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| CN207738572U true CN207738572U (en) | 2018-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115057572A (en) * | 2022-07-26 | 2022-09-16 | 北京清新环境技术股份有限公司 | Treatment system and method for recycling desulfurization wastewater by using waste heat of power plant |
-
2017
- 2017-12-27 CN CN201721864236.5U patent/CN207738572U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115057572A (en) * | 2022-07-26 | 2022-09-16 | 北京清新环境技术股份有限公司 | Treatment system and method for recycling desulfurization wastewater by using waste heat of power plant |
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