CN208898533U - A kind of Zero discharging system of power plant desulfurization wastewater - Google Patents
A kind of Zero discharging system of power plant desulfurization wastewater Download PDFInfo
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- CN208898533U CN208898533U CN201821477481.5U CN201821477481U CN208898533U CN 208898533 U CN208898533 U CN 208898533U CN 201821477481 U CN201821477481 U CN 201821477481U CN 208898533 U CN208898533 U CN 208898533U
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Abstract
The utility model relates to a kind of Zero discharging systems of power plant desulfurization wastewater, belong to desulfurization wastewater processing technology field, including boiler, air preheater, electric precipitator, wet desulphurization device, chimney, dewaterer, waste water cache box, centrifugal spray drying device, the centrifugal spray drying device is high speed centrifugal atomization device from top to bottom, hot fume distributor, drying tower main body, boiler successively with air preheater, deduster, wet desulphurization device, chimney connection, wet desulphurization device successively with belt dewaterer, waste water cache box, centrifugal spray drying device connection, boiler is connect with centrifugal spray drying device, centrifugal spray drying device is connect with electric precipitator.Boiler is bi-directionally connected with air preheater.High speed centrifugal atomization device, hot fume distributor are dismountable between drying tower main body, are centrifugal delivery pump between waste water cache box and centrifugal spray drying device, and the partial size of atomizing particle is small, and the residence time is long, and evaporation is rapid；It invests low with operating cost.
Description
Technical field
The utility model belongs to desulfurization wastewater processing technology field, and in particular to the Zero discharging system of power plant desulfurization wastewater.
Background technique
With the growing tension of China's water resource, the requirement of environmental protection is continuously improved, the wastewater problem that power plant is faced
It becomes increasingly conspicuous.
Desulfurization wastewater is mainly derived from rotational flow station and gypsum as one of waste water most intractable in boiler operatiopn waste water
Dehydration and cleaning.Chlorine ion concentration is excessively high in desulfurization wastewater to generate serious corrosion to equipment such as tank body, pipeline, the pump housings；It is high
The chloride ion of concentration can form complex compound with metal ion, inhibit to chemically react in absorption tower, reduce desulfuration efficiency；Make serosity
Matter changes, and generates bubble；It also will affect gypsum qualitt.Desulfurization operation is generated not in order to avoid chlorine ion concentration is excessively high
Good influence maintains chloride ion in desulphurization system by being discharged to waste water of the part containing higher concentration chloride ion and filling into new water
Balance can generally control chlorine ion concentration in 20000mg/L or less.Other than chlorine ion concentration height, desulfurization wastewater is also
Hardness is high, Ca2+About 1500~5000mg/L, Mg2+About 3000~6000mg/L is easy fouling；Suspended matter is high, exists substantially
10000mg/L or more；Salt content is high, and normal condition is in 30000~60000mg/L；Corrosivity is strong, F-Content is high, and at acidity；
The features such as complicated component, change of water quality is big, and chromium, arsenic, lead, mercury and other heavy metals are contained in waste water.
The country generallys use at present plus lime is neutralized, flocculated, " three headers " desulfuration waste water treatment process of precipitation process is deposited
It is excessively high in total salt content and not can be removed chloride ion in waste water；Continuous dosing in wastewater treatment process, operating cost are high；It purifies
Water can not recycle, it will usually be handled by modes such as coal yard sprinkling, grey field sprinkling or plant area's greenings, such place
Reason mode will cause the problems such as pollution to soil and groundwater.Although flue Direct spraying seasoning handles desulfurization wastewater equipment
Cost of investment is lower, but entire technique cannot be isolated with host system, and when accident need to shut down processing；Increase unit normally to transport safely
Capable risk；Wastewater treatment capacity is limited, and the local decompression that obviously formed at spray group can not unavoidably is influenced by boiler load, high
Cloud of dust gas causes structure to block；Nozzle is sprayed onto walling of flue or the uneven local partial size of sprinkling is big, and dust stratification incrustation phenomenon is caused to compare
The problems such as serious.Embrane method evaporative crystallization technique haves the shortcomings that wide occupied area, construction cost and operating cost are high, can not be extensive
Using.Realize that power plant effluent " low-cost zero-discharge " becomes problem urgently to be resolved.
Utility model content
For above-mentioned problems of the prior art, it is useless that a purpose of the utility model is to provide a kind of power plant desulfurization
The Zero discharging system of water.It is main to carry out high speed centrifugation drying using centrifugal spray drying device, it is combined with desulphurization system, pot
The hot fume of the flue gas that furnace generates in the process of processing is used to make heat source, returns to flue gas treatment process again after dry,
Desulfurization is carried out, cleared discharge is carried out, achieve the purpose that desulfurization, flue gas while being carried out.
In order to solve the above technical problems, the technical solution of the utility model are as follows:
A kind of Zero discharging system of power plant desulfurization wastewater, including boiler, air preheater, electric precipitator, wet desulphurization dress
It sets, chimney, dewaterer, waste water cache box, centrifugal spray drying device, the centrifugal spray drying device is high speed from top to bottom
Centrifugal atomizer, hot fume distributor, drying tower main body, boiler successively with air preheater, deduster, wet desulphurization device,
Chimney connection, wet desulphurization device successively connect with belt dewaterer, waste water cache box, centrifugal spray drying device, boiler and
Centrifugal spray drying device connection, centrifugal spray drying device are connect with electric precipitator.
By desulphurization system be discharged desulfurization wastewater be collected into waste water cache box, then by waste water delivery pump be delivered to from
Heart spray drying system, desulfurization wastewater is atomized into tiny drop by the high speed centrifugal atomization device on the top of system, in drop
In dropping process, moisture is evaporated, and the salt in waste water forms powder or granular desciccate falls into collection bucket.It is spraying
Heat source used in drying system derives from the hot wind before boiler air preheater, and electric precipitation is returned to after spray drying system
In boiler exhaust gas processing system before device (ESP).Desulfurization fume processing system in compared with the prior art, the place of the application
Reason system utilizes high speed centrifugation drying device, keeps sweetening process simpler, pollutes small, desulfuration efficiency height.
Preferably, boiler connects air preheater.
The hot fume of boiler discharge enters air preheater and exchanges heat with air, and the air being heated is heated
Air enter in boiler again, reduce energy consumption.
Preferably, air preheater connects primary air fan.
Preferably, the deduster is electric precipitator or bag filter, the pipe that deduster is connect with wet desulphurization device
Air-introduced machine is set on road.
Preferably, the dewaterer is vacuum belt dewaterer.
Vacuum belt dewaterer import is the gypsum slurries from desulfurizing tower discharge, and exit end exports dewatered stone
Cream, other end are then discharge waste water.
Preferably, the high speed centrifugal atomization device of the centrifugal spray drying device can be with hot fume distributor and drying tower master
Body disassembly, the high speed centrifugal atomization device use frequency control.
Preferably, waste water delivery pump is set between waste water cache box and centrifugal spray drying device.
The flow of the liquid of the adjustable high speed centrifugal atomization device into centrifugal spray drying device of waste water delivery pump, into
And the rate of atomization is adjusted, guarantee the efficiency of atomization.
The utility model has the beneficial effects that
1) investment is low with operating cost, and compared with traditional three headers+film filtering+evaporative crystallization technique of zero discharge, system is thrown
Rate reduce about 78.57%~87.5%, and operating cost saves about 51.78%~75%；
2) process is short, and repair and maintenance is simple, without increasing personnel cost, can use existing boiler system personnel unified management；
3) partial size for the atomizing particle that the high-speed centrifugal atomization device of the application obtains is small, and the residence time is long, and evaporation is rapid,
System reliability is strong；
4) the hot fume distributor of high-speed centrifugal atomization device improves the mixture homogeneity of hot fume and drop, enhancing
Mass-and heat-transfer effect；
5) high speed centrifugal atomization device centrifugal intensity is big, is not easy to plug, and can be used for handling the waste water of high solids；
6) separable drying tower is set up, maintenance, operation are independent, not by unit influence on system operation；Before extracting air preheater
The higher flue gas of temperature can extract different amounts of hot fume according to the difference for the treatment of capacity, guarantee that power plant's terminal industrial wastewater can
It is evaporated completely, evaporation is not influenced by boiler load, will not be influenced on follow-up equipment.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is a kind of Zero discharging system structure chart of power plant desulfurization wastewater；
1, boiler, 2, air preheater, 3, deduster, 4, wet desulphurization device, 5, chimney, 6, vacuum belt dewaterer,
7, waste water cache box, 8, dehydrated gypsum, 9, waste water delivery pump, 10, high speed centrifugal atomization device, 11, hot fume distributor, 12, dry
Dry main body, 13, primary air fan, 14, air-introduced machine.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Below with reference to embodiment, the present invention will be further described
Embodiment 1
A kind of Zero discharging system of power plant desulfurization wastewater, including boiler 1, air preheater 2, electric precipitator 3, wet desulphurization
Device 4, chimney 5, vacuum belt dewaterer 6, waste water cache box 7, centrifugal spray drying device, the centrifugal spray drying device
From top to bottom be high speed centrifugal atomization device 10, hot fume distributor 11, drying tower main body 12, boiler 1 successively with air preheater
2, deduster 3, wet desulphurization device 4, chimney 5 connect, wet desulphurization device 4 successively with belt dewaterer 6, waste water cache box 7,
Centrifugal spray drying device connection, boiler 1 are connect with centrifugal spray drying device, centrifugal spray drying device and electric precipitator 2
Connection.
Embodiment 2
A kind of Zero discharging system of power plant desulfurization wastewater, including boiler 1, air preheater 2, electric precipitator 3, wet desulphurization
Device 4, chimney 5, vacuum belt dewaterer 6, waste water cache box 7, centrifugal spray drying device, the centrifugal spray drying device
From top to bottom be high speed centrifugal atomization device 10, hot fume distributor 11, drying tower main body 12, boiler 1 successively with air preheater
2, deduster 3, wet desulphurization device 4, chimney 5 connect, wet desulphurization device 4 successively with belt dewaterer 6, waste water cache box 7,
Centrifugal spray drying device connection, boiler 1 are connect with centrifugal spray drying device, centrifugal spray drying device and electric precipitator 2
Connection.
Boiler 1 connects air preheater 2.
Air preheater 2 connects primary air fan 13.
The dewaterer is vacuum belt dewaterer 6.
The high speed centrifugal atomization device 10 of the centrifugal spray drying device can be with hot fume distributor 11 and drying tower main body
12 disassemblies.
The deduster 3 is electric precipitator.Air-introduced machine 14 is set on the pipeline that deduster 3 is connect with wet desulphurization device 4.
Waste water delivery pump 9 is set between waste water cache box 7 and centrifugal spray drying device, inside the waste water cache box 7
Blender is set.
Embodiment 3
A kind of Zero discharging system of power plant desulfurization wastewater, including boiler 1, air preheater 2, electric precipitator 3, wet desulphurization
Device 4, chimney 5, vacuum belt dewaterer 6, waste water cache box 7, centrifugal spray drying device, the centrifugal spray drying device
From top to bottom be high speed centrifugal atomization device 10, hot fume distributor 11, drying tower main body 12, boiler 1 successively with air preheater
2, deduster 3, wet desulphurization device 4, chimney 5 connect, wet desulphurization device 4 successively with belt dewaterer 6, waste water cache box 7,
Centrifugal spray drying device connection, boiler 1 are connect with centrifugal spray drying device, centrifugal spray drying device and electric precipitator 2
Connection.
Boiler 1 connects air preheater 2.
Air preheater 2 connects primary air fan 13.
The dewaterer is vacuum belt dewaterer 6.
The high speed centrifugal atomization device 10 of the centrifugal spray drying device can be with hot fume distributor 11 and drying tower main body
12 are dismantled.
The deduster 3 is bag filter.Air-introduced machine is set on the pipeline that deduster 3 is connect with wet desulphurization device 4
14。
Waste water delivery pump 9 is set between waste water cache box 7 and centrifugal spray drying device, inside the waste water cache box 7
Blender is set.
Embodiment 4
A kind of Zero discharging system of power plant desulfurization wastewater carries out the process of desulfurization wastewater:
The hot fume that boiler 1 is discharged enters air preheater 2 and is cooled, and removes in flue gas subsequently into electric precipitator 3
Flying dust sloughs the sulfur dioxide in flue gas subsequently into wet desulphurization device 4, and clean flue gas is discharged by chimney 5；
The gypsum slurries that wet desulphurization device 4 is discharged enter vacuum belt dewaterer 6, after gypsum dehydration, vacuum extraction
Desulfurization wastewater enter waste water cache box 7, the waste water of waste water cache box 7 enters high speed centrifugal atomization device by waste water delivery pump 9
10, waste water by under the heat effect of high speed centrifugation and hot fume, moisture is evaporated, salt present in waste water formed powder or
Granular desciccate falls into collection bucket；
The hot fume and desciccate of centrifugal spray drying device enter electric precipitator 3, fly in desciccate and flue gas
Ash is trapped by electric precipitator 3, and flue gas travels further into wet desulphurization device 4 and carries out desulfurization.
The material of waste water cache box 7 is that FRP, carbon steel or steel concrete apply glass flake, resistance at least 20000ppmCl-The gold of corrosion
Category and non-metallic material.Blender in waste water cache box is resistance to 20000ppmCl-The alloy of corrosion.
Waste water delivery pump 9 is resistance to 20000ppmCl-The alloy of corrosion.
The hot fume distributor 11 and drying tower main body 12 use carbon steel or resistance to 20000ppmCl-The alloy of corrosion,
There is heat preservation outside.
The temperature of the hot fume of boiler discharge is 260~350 DEG C.Temperature before hot fume enters deduster is 140-
180℃。
High speed centrifugal atomization device 10 and waste water part in the present invention use carbon steel or resistance to 20000ppmCl-Corrosion
Alloy.
The desulfurization wastewater of the application forms powder or particle by whole dry nebulizations after high-speed centrifugal atomization device
Desciccate.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (7)
1. a kind of Zero discharging system of power plant desulfurization wastewater, it is characterised in that: including boiler, air preheater, deduster, wet process
Desulfurizer, chimney, dewaterer, waste water cache box, centrifugal spray drying device, the centrifugal spray drying device is from top to bottom
For high speed centrifugal atomization device, hot fume distributor, drying tower main body, boiler successively takes off with air preheater, electric precipitator, wet process
Sulphur device, chimney connection, wet desulphurization device are successively connect with belt dewaterer, waste water cache box, centrifugal spray drying device,
Boiler is connect with centrifugal spray drying device, and centrifugal spray drying device is connect with electric precipitator.
2. system according to claim 1, it is characterised in that: the boiler connects air preheater.
3. system according to claim 1, it is characterised in that: the air preheater connects primary air fan.
4. system according to claim 1, it is characterised in that: the pipeline that the electric precipitator is connect with wet desulphurization device
Upper setting air-introduced machine.
5. system according to claim 1, it is characterised in that: the deduster is electric precipitator or bag filter；It is de-
Water dispenser is vacuum belt dewaterer.
6. system according to claim 1, it is characterised in that: the high speed centrifugal atomization device of the centrifugal spray drying device
It can be dismantled with hot fume distributor and drying tower main body, the high speed centrifugal atomization device uses frequency control.
7. system according to claim 1, it is characterised in that: between the waste water cache box and centrifugal spray drying device
Waste water delivery pump is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821477481.5U CN208898533U (en) | 2018-09-10 | 2018-09-10 | A kind of Zero discharging system of power plant desulfurization wastewater |
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| CN201821477481.5U CN208898533U (en) | 2018-09-10 | 2018-09-10 | A kind of Zero discharging system of power plant desulfurization wastewater |
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| CN208898533U true CN208898533U (en) | 2019-05-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110639353A (en) * | 2019-08-23 | 2020-01-03 | 安徽理工大学 | Flue gas desulfurization device of coal boiler |
| CN112604497A (en) * | 2020-12-30 | 2021-04-06 | 广东电网有限责任公司电力科学研究院 | System for desulfurization waste water desorption flue gas fine particle and sulfur trioxide in coordination |
-
2018
- 2018-09-10 CN CN201821477481.5U patent/CN208898533U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110639353A (en) * | 2019-08-23 | 2020-01-03 | 安徽理工大学 | Flue gas desulfurization device of coal boiler |
| CN112604497A (en) * | 2020-12-30 | 2021-04-06 | 广东电网有限责任公司电力科学研究院 | System for desulfurization waste water desorption flue gas fine particle and sulfur trioxide in coordination |
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