CN203878017U - Desulfurization wastewater reuse device for power plant - Google Patents

Desulfurization wastewater reuse device for power plant Download PDF

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Publication number
CN203878017U
CN203878017U CN201420209314.8U CN201420209314U CN203878017U CN 203878017 U CN203878017 U CN 203878017U CN 201420209314 U CN201420209314 U CN 201420209314U CN 203878017 U CN203878017 U CN 203878017U
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water
boiler
group
film group
flue
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CN201420209314.8U
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刘其彬
林育兹
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Sheng Environmental Technology (xiamen) Co Ltd
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Sheng Environmental Technology (xiamen) Co Ltd
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Abstract

The utility model discloses a desulfurization wastewater reuse device for power plants. The device comprises a trigeminy tank, a softening tank, a membrane treatment system and a boiler waste heat recycling system, wherein the trigeminy tank is connected with the softening tank for softening treatment and is subsequently fed into the membrane treatment system; concentrated water after membrane treatment is fed into the boiler waste heat recycling system for spraying evaporation; the boiler waste heat recycling system comprises a boiler flue and an atomization nozzle; the atomization nozzle is arranged inside the boiler flue; the inlet end of the nozzle extends outside the boiler flue and is respectively connected with a concentrated water pipeline and a high pressure air tube; the wastewater is ejected and atomized at the nozzle outlet to form liquid drops; after being atomized and evaporated, the wastewater is discharged outside the flue together with the fume and is fed into a dust collector. By adopting the device, not only is the purpose of emission reduction achieved, but also the resource can be recycled and reused, and zero emission of wastewater in fume desulfurization can be achieved indeed.

Description

Power plant desulfurization wastewater recycling device
Technical field
The utility model discloses a kind of method of power plant desulfurization waste water recycling, by International Patent Classification (IPC) (IPC), divides and belongs to desulfurization wastewater processing technology field.
Background technology
" limestone/lime-gypsum method " flue gas desulfurization technique is because efficiently removing the SO2 in flue gas, it is a kind of most popular method in current flue gas desulphurization engineering, in system, discharging a certain amount of waste water is desulfurization wastewater, in it, contain a large amount of suspended substances as the oxyhydroxide of gypsum particle, SiO2, Al and Fe and vitriol, muriate, calcium ions and magnesium ions and micro heavy simultaneously, wherein a lot of materials are in national environmental standard, to require the strict first kind pollutent of controlling, so desulfurization wastewater must just can discharge through processing.
Conventional method of wastewater treatment flow process is complicated, and consumes more pharmaceutical chemicals, and waste water after treatment still cannot be recycled again; And adopt vaporizer the technique of waste water evaporate to dryness to be reached to " zero release " of waste water, but higher because of the content of calcium in waste water and sulfate ion, in evaporative process, in vaporizer, produce calcium sulfate scale, be difficult to cleaning and cause evaporation equipment to move.
In industry so-called " zero release " refer to not waters waste discharge earthward of power plant, all water that leaves power plant is all the form with steam, or suitable form sealing, the landfill such as mud disposed.Realize waste water zero emission; the inevitable water surrounding of protecting to greatest extent of power plant; the energy, the resource of those being haveed no alternative but give off make full use of simultaneously, finally eliminate the existence of Nonrenewable resources and the energy, finally realize comprehensive improvement of economy of power plant benefit and social benefit.
Summary of the invention
For the deficiencies in the prior art, the utility model provides a kind of method of power plant desulfurization waste water recycling, can realize waste water zero emission.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of method of power plant desulfurization waste water recycling, comprise three headers, softening pond, film processing system and boiler waste heat recovery system, three described headers be by and case, settler and flocculation tanks connect to form successively, the supernatant liquor of flocculation tanks is passed into softening pond and softens processing, water after softening pond is softening enters into film processing system, this film processing system comprises ultra-filtration membrane group and sea water desaltination film group, film group filtered water is passed into sea water desaltination film group by high-pressure pump, this desalination film group is comprised of for ultrafiltration water is carried out to desalting processing two-stage desalination film group, the supernatant water of desalination film group directly enters into RO desalination water tank, the dense water of desalination film group enters into boiler waste heat recovery system and carries out spray evaporation, boiler waste heat recovery system comprises boiler flue and atomizing nozzle, in described boiler flue, be provided with atomizing nozzle, the inlet end of this nozzle extends to the dense waterpipe of the outer also difference of boiler flue and is connected with high-pressure air tube, in nozzle exit jet atomization, form drop, the maximum atomizing angle of atomizing nozzle reaches 120 °, after atomization and vaporization, with flue gas, discharge flue and enter fly-ash separator.
Further, each casing top of described three headers connects dosing tank and is regulated desulfurization wastewater pH value and removed impurity in it by physical chemistry method, and three header bottoms are connected respectively to blowoff basin circular treatment.
Further, described ultra-filtration membrane group is comprised of two row's ultra-filtration membrane groups, each ultra-filtration membrane group is in parallel by 8 above ultrafiltration membrane elements, film group filtered water enters into ultrafiltration and produces water tank, ultrafiltration is produced water tank and is connected to sea water desaltination film group by high-pressure pump, and ultra-filtration membrane group wherein is not connected backwashing pump with sea water desaltination membrane component.
The beneficial effects of the utility model are as follows:
1, adopt the utility model, not only reached the object reducing discharging, resource can cycling and reutilization, really accomplishes " zero release " of waste water in flue gas desulfurization;
2, the utility model adopts three headers, embrane method to process and flue spray method, and cost is low, and maintenance of the equipment is simple, environmentally friendly, has good economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the utility model schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Embodiment: refer to Fig. 1, a kind of method of power plant desulfurization waste water recycling, comprise three headers 1, softening pond 2, film processing system 3 and boiler waste heat recovery system 4, three described headers 1 be by and case 11, settler 12 and flocculation tanks 13 connect to form successively, the supernatant liquor of flocculation tanks 13 is passed into softening pond 2 and softens processing, water after softening pond 2 is softening enters into film processing system 3, this film processing system 3 comprises ultra-filtration membrane group 31 and sea water desaltination film group 32, film group filtered water is passed into sea water desaltination film group 32 by high-pressure pump 5, this desalination film group 32 is comprised of for ultrafiltration water is carried out to desalting processing two-stage desalination film group, the supernatant water of desalination film group 32 directly enters into RO desalination water tank 61, the dense water of desalination film group is by dense water tank 62 and enter into boiler waste heat recovery system 4 and carry out spray evaporation, boiler waste heat recovery system 4 comprises boiler flue and atomizing nozzle 41, in described boiler flue, be provided with atomizing nozzle 41, the inlet end of this nozzle extends to the dense waterpipe of the outer also difference of boiler flue and is connected with high-pressure air tube, in nozzle exit jet atomization, form drop, the maximum atomizing angle of atomizing nozzle reaches 120 °, after atomization and vaporization, with flue gas, discharge flue and enter fly-ash separator 7.Each casing top of three headers of the present utility model connects dosing tank and is regulated desulfurization wastewater pH value and removed impurity in it by physical chemistry method, and three header bottoms are connected respectively to blowoff basin 14 circular treatment.
Ultra-filtration membrane group of the present utility model is comprised of two row's ultra-filtration membrane groups, each ultra-filtration membrane group is in parallel by 8 above ultrafiltration membrane elements, film group filtered water enters into ultrafiltration and produces water tank, ultrafiltration is produced water tank and is connected to sea water desaltination film group by high-pressure pump, and ultra-filtration membrane group wherein is not connected backwashing pump with sea water desaltination membrane component.
The utility model three header removal heavy metals, the softening water body in softening pond, removes fouling metallic element, and film is processed
System reduces the water yield, reclaims fresh water, and boiler waste heat recovery system is processed dense water.
The waste water (being desulfurization wastewater) of getting certain power plant desulphurization system discharge, after testing, its main component is as follows:
1、pH: 2、SS:11300mg/L
3, chlorion: 13500mg/L 4, sulfate radical: 4800mg/L
5, calcium ion: 1600mg/L 6, magnesium ion: 1800mg/L
7, fluorion: 120mg/L 8, sodium ion: 5800mg/L
9、COD Cr:195mg/L 10、Zn:10mg/L
11、Hg:1mg/L 12、Cd:3mg/L
13、Cr:2mg/L 14、Pb:5mg/L
15、Ni:1mg/L 16、Cu:15mg/L
17、Fe:3mg/L
1, pH:9.1 2, chlorion: 12400mg/L
3, sulfate radical: 80 mg/L 4, calcium ion: 7mg/L
5, sodium ion: 12000mg/L 6, carbonate: 280mg/L
7, COD cr: 32mg/L 8, other ion: trace.
Above record, only, for utilizing the embodiment of this origination techniques content, modification, variation that any those skilled in the art use this creation to do, all belong to the scope of the claims that this creation is advocated, and be not limited to those disclosed embodiments.

Claims (3)

1. a power plant desulfurization wastewater recycling device, it is characterized in that: comprise three headers, softening pond, film processing system and boiler waste heat recovery system, three described headers be by and case, settler and flocculation tanks connect to form successively, the supernatant liquor of flocculation tanks is passed into softening pond and softens processing, water after softening pond is softening enters into film processing system, this film processing system comprises ultra-filtration membrane group and sea water desaltination film group, film group filtered water is passed into sea water desaltination film group by high-pressure pump, this desalination film group is comprised of for ultrafiltration water is carried out to desalting processing two-stage desalination film group, the supernatant water of desalination film group directly enters into RO desalination water tank, the dense water of desalination film group enters into boiler waste heat recovery system and carries out spray evaporation, boiler waste heat recovery system comprises boiler flue and atomizing nozzle, in described boiler flue, be provided with atomizing nozzle, the inlet end of this nozzle extends to the dense waterpipe of the outer also difference of boiler flue and is connected with high-pressure air tube, in nozzle exit jet atomization, form drop, the maximum atomizing angle of atomizing nozzle reaches 120 °, after atomization and vaporization, with flue gas, discharge flue and enter fly-ash separator.
2. power plant desulfurization wastewater recycling device according to claim 1, it is characterized in that: each casing top of described three headers connects dosing tank and regulated desulfurization wastewater pH value and removed impurity in it by physical chemistry method, three header bottoms are connected respectively to blowoff basin circular treatment.
3. power plant desulfurization wastewater recycling device according to claim 1 and 2, it is characterized in that: described ultra-filtration membrane group is comprised of two row's ultra-filtration membrane groups, each ultra-filtration membrane group is in parallel by 8 above ultrafiltration membrane elements, film group filtered water enters into ultrafiltration and produces water tank, ultrafiltration is produced water tank and is connected to sea water desaltination film group by high-pressure pump, and ultra-filtration membrane group wherein is not connected backwashing pump with sea water desaltination membrane component.
CN201420209314.8U 2014-04-28 2014-04-28 Desulfurization wastewater reuse device for power plant Active CN203878017U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105110509A (en) * 2015-09-17 2015-12-02 南通海容热能环境工程有限公司 Flue gas desulfurization wastewater pretreatment device for thermal power plant
CN105110543A (en) * 2015-09-17 2015-12-02 南通海容热能环境工程有限公司 Desulphurization wastewater zero discharge system of coal-fired unit of thermal power plant
CN105174580A (en) * 2015-08-25 2015-12-23 天津市华通寰昊水务科技有限公司 Desulphurization waste-water zero discharge processing system and technology
CN105330081A (en) * 2015-12-01 2016-02-17 上海龙净环保科技工程有限公司 Method and system suitable for zero discharge of desulfurization waste water of power plant
CN105712536A (en) * 2016-03-30 2016-06-29 北京朗新明环保科技有限公司南京分公司 Membrane separation combination zero-emission system for deeply treating desulfurization wastewater with whole membrane method
CN106007131A (en) * 2016-03-30 2016-10-12 北京朗新明环保科技有限公司南京分公司 Desulfurization wastewater microfiltration-nanofiltration-reverse osmosis membrane combined processing system and technology
CN106587225A (en) * 2016-12-07 2017-04-26 浙江德创环保科技股份有限公司 Zero discharge process for desulfurization wastewater
CN107129094A (en) * 2017-06-08 2017-09-05 上海电力学院 The Zero discharging system of desulfurization wastewater is evaporated based on multi-heat source
CN111135692A (en) * 2018-11-05 2020-05-12 新疆硅基新材料创新中心有限公司 Method and system for recycling waste slurry obtained by power plant boiler flue gas desulfurization and denitrating power plant boiler flue gas

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105174580A (en) * 2015-08-25 2015-12-23 天津市华通寰昊水务科技有限公司 Desulphurization waste-water zero discharge processing system and technology
CN105110509A (en) * 2015-09-17 2015-12-02 南通海容热能环境工程有限公司 Flue gas desulfurization wastewater pretreatment device for thermal power plant
CN105110543A (en) * 2015-09-17 2015-12-02 南通海容热能环境工程有限公司 Desulphurization wastewater zero discharge system of coal-fired unit of thermal power plant
CN105330081A (en) * 2015-12-01 2016-02-17 上海龙净环保科技工程有限公司 Method and system suitable for zero discharge of desulfurization waste water of power plant
CN105712536A (en) * 2016-03-30 2016-06-29 北京朗新明环保科技有限公司南京分公司 Membrane separation combination zero-emission system for deeply treating desulfurization wastewater with whole membrane method
CN106007131A (en) * 2016-03-30 2016-10-12 北京朗新明环保科技有限公司南京分公司 Desulfurization wastewater microfiltration-nanofiltration-reverse osmosis membrane combined processing system and technology
CN106587225A (en) * 2016-12-07 2017-04-26 浙江德创环保科技股份有限公司 Zero discharge process for desulfurization wastewater
CN107129094A (en) * 2017-06-08 2017-09-05 上海电力学院 The Zero discharging system of desulfurization wastewater is evaporated based on multi-heat source
CN107129094B (en) * 2017-06-08 2020-07-17 上海电力学院 Zero discharge system based on multi-heat-source evaporation desulfurization waste water
CN111135692A (en) * 2018-11-05 2020-05-12 新疆硅基新材料创新中心有限公司 Method and system for recycling waste slurry obtained by power plant boiler flue gas desulfurization and denitrating power plant boiler flue gas

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