CN205973869U - System for with surplus thermal treatment desulfurization waste water of flue gas - Google Patents

System for with surplus thermal treatment desulfurization waste water of flue gas Download PDF

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Publication number
CN205973869U
CN205973869U CN201620971546.6U CN201620971546U CN205973869U CN 205973869 U CN205973869 U CN 205973869U CN 201620971546 U CN201620971546 U CN 201620971546U CN 205973869 U CN205973869 U CN 205973869U
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China
Prior art keywords
concentration tower
waste water
desulfurization wastewater
spraying layer
underflow
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CN201620971546.6U
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Chinese (zh)
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李筱璋
朱文瑜
髙燎
郑伟
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Chengdu Rui Si Green Technology Limited-Liability Co
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Chengdu Rui Si Green Technology Limited-Liability Co
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Abstract

The utility model discloses a system for with surplus thermal treatment desulfurization waste water of flue gas, including concentration tower and thick stock case, being provided with in the concentration tower and spraying the layer, the thick stock case while is with concentration tower inside and spray layer intercommunication, sets up the through -hole that lets in the flue gas on the concentration tower to the through -hole setting is spraying layer top, is provided with the circulating pump in the concentration tower outside, the circulating pump simultaneously with the concentration tower inside with layer intercommunication spray, and circulating pump and concentration tower inside intercommunication department are located and spray below the layer. The desulfurization waste water that this system utilized waste heat of boiler flue gas's heat evaporation to come out from desulfurized gypsum swirler reaches the purpose of waste control by waste and the zero release of desulfurization waste water, and the evaporation process is gentle, and operating flexibility is high, and the exhaust gas volumn that needs is less, need not consume other heats source, and the power consumption is few, takes up an area of for a short time, and easy to carry out has in addition that the investment of removing economizes, the working costs hangs down, need not add advantage such as any chemical.

Description

A kind of system processing desulfurization wastewater with fume afterheat
Technical field
This utility model is related to a kind of system processing desulfurization wastewater and in particular to the process desulfurization of one kind fume afterheat is given up The system of water.
Background technology
Domestic flue gas desulfurization at present can be divided into wet method, semidry method and dry method three major types, wherein limestone gypsum wet cigarette Desulfurization technique has desulfuration efficiency height, operational reliability is high, it is wide to be suitable for coal scope, absorbent utilization rate is high, equipment operation The SO that many advantages, such as rate is high cheap and easy to get with absorbent is most widely used in the world at present, technology is the most ripe2Removing skill Art, accounts for installing the 90% of FGD unit capacity.
Limestone gypsum wet flue gas desulfurizing technique is in order to ensure normal operation and the desulfurizing byproduct stone of desulphurization system The quality of cream is it is necessary to discharge a certain amount of desulfurization wastewater.Desulfurization wastewater conventional treatment is typically using neutralization, flocculation, precipitation at present With filter etc. handling process, though can meet《Thermal power plant's limestone-gypsum wet desulfuration waste water quality Con trolling index》(DL/T 997-2006)Requirement, but be still high chloride ion, high saliferous and the waste water containing micro heavy, if do not carried out depth Reason, the limitation of its recovery range is very big, if entering extraneous water body, also very high to the extent of injury of environment, but deep Degree processing cost is high, complex process.
Utility model content
Technical problem to be solved in the utility model be existing desulfurization wastewater after the process of conventional processes still So it is unsatisfactory for discharge standard, needs through advanced treating again, cause time and cost to increase, the energy of consumption increases, and carries Process the system of desulfurization wastewater for a kind of fume afterheat, this system utilizes the heat of vaporization of residual heat from boiler fume from desulfurization stone Cream cyclone desulfurization wastewater out, reaches the treatment of wastes with processes of wastes against one another and the purpose of desulfurization wastewater zero-emission, has except reduced investment, running cost With low, be not required to add the advantages such as any chemical drugss.
This utility model is achieved through the following technical solutions:
A kind of system processing desulfurization wastewater with fume afterheat, including concentration tower and underflow case, is arranged in described concentration tower There is spraying layer, underflow case is simultaneously internal with concentration tower and spraying layer connects, and concentration tower offers the through hole being passed through flue gas, and And through hole is arranged on above spraying layer, it is provided with circulating pump outside concentration tower, circulating pump is simultaneously internal with concentration tower and sprays Layer connection, and circulating pump and the connectivity part within concentration tower are below spraying layer.Existing desulfurization wastewater is through conventional process work It is still high chloride ion, high saliferous and the waste water containing micro heavy after the process of skill, if do not carried out advanced treating, its time The limitation receiving range is very big, if entering extraneous water body, also very high to the extent of injury of environment, but advanced treating becomes This height, complex process.In some plant produced, it produces the flue gas containing high temperature in a large number, is all direct as waste gas usually It is discharged in air, not only pollutes environment, also waste energy, this programme is then to be used as reaction tower by designing following current tower, In tower, flow velocity is high, using residual heat from boiler fume heat of vaporization from desulfurated plaster cyclone desulfurization wastewater out, reach with useless Control useless and desulfurization wastewater zero-emission purpose, have except reduced investment, operating cost is low, it is excellent to be not required to add any chemical drugss etc. Gesture.
Be provided with waste water tank outside concentration tower, between waste water tank and concentration tower, be provided with waste water pump, and waste water pump simultaneously with Waste water tank connects with concentration tower, is provided with waste water box mixer in waste water tank.Waste water tank be as will from Gypsum Fibrosum cyclone come Desulfurization wastewater import collect so that its can unify and in large quantities enter concentration tower, thus realize concentration tower work continuous Property and high efficiency.
It is provided with demister, demister is connected with concentration tower and flue simultaneously outside concentration tower;Demister and concentration tower Connectivity part is located at below spraying layer, and demister and the connectivity part of concentration tower are located at circulating pump and the connectivity part within concentration tower simultaneously Top.Demister is to be separated for the water smoke producing contact desulfurization wastewater with high-temperature flue gas after, does not contain only in water smoke Moisture, it also results in staining and seriously of blower fan, heat exchanger and flue also dissolved with sulphuric acid, sulfate, sulfur dioxide etc. simultaneously The material that corrosion, therefore design demister are passed through flue carries out separating it is ensured that the service life of flue.
It is provided with concentration tower air-introduced machine, concentration tower air-introduced machine one end connects with positioned at the through hole concentrating top of tower outside concentration tower Logical, the other end is connected with flue.Concentration tower air-introduced machine is that the high-temperature flue gas in flue are rapidly introduced into concentration tower so that flue gas has Enough speed, thus being capable of when contacting quickly processing, preserves intake and the circulation speed of flue gas with desulfurization wastewater Rate.
Be provided with pressure filter outside underflow case, between pressure filter and underflow case, be provided with underflow pump, and underflow pump simultaneously with Pressure filter connects with underflow case, and is provided with underflow box mixer in underflow case.Pressure filter is by the material filter in underflow case Go out mud cake, deliver to cure system, filtrate returns underflow case.
Spraying layer bottom is provided with several nozzles, and nozzle all connects with inside spraying layer.Nozzle will be passed through spray The desulfurization wastewater of layer is quick and is equably sprinkled upon in concentration tower, increases the area with smoke contacts, realizes contact fully, processes Rapider.
This utility model passes through to arrange concentration tower between boiler tail cleaner unit and desulfurizing tower, is sent desulfurization wastewater with pump To nozzle spray, adjust nozzle flow and desulfurization wastewater is sprayed in concentration tower, directly utilize residual heat from boiler fume to concentration tower Atomization desulfurization wastewater co-current contact is evaporated concentration, and moisture is pumped into by conveying with fume emission, concentrated solution Filter pressing segregation apparatuss form the outer row of filter cake solidification.
Wherein concentration tower is set to following current tower, and flue gas enters above concentration tower, useless with what spraying layer in concentration tower flowed out Water co-current contact, is evaporated heat exchange, arranges demister in concentration tower exit, the drop being carried by flue gas machinery is taken off Remove.
This utility model compared with prior art, has such advantages as and beneficial effect:
(1)This programme requires incomplete evaporation desulfurization wastewater in whole process, only waste water is constantly concentrated, and steams The process of sending out is gentle, and operating flexibility is high, and the exhaust gas volumn of needs is less, and it is not necessary to consume other thermals source, power consumption is few, takes up an area little, runs Low cost;
(2)Compared with traditional desulfurization wastewater treatment technology, desulfurization wastewater forms closed circulation in the system to this technology, Waste water is not had to discharge, only solidss produce it is achieved that wet desulfurization of flue gas by limestone-gypsum method technology wastewater zero discharge, filter pressing The filter cake that machine is formed can be transported outward and carry out innoxious landfill disposal, the liquid of exclusion(Mother solution)By circulation pumped back concentration tower continuation Reason;
(3)This technical pattern is simply it is easy to implement;Concentrate inner wall of tower, pipeline, nozzle etc. and can be selected for anti-corrosion material;By In there is no heat transfer component, thus avoiding due to the corrosion causing of conducting heat with scale problems it is not necessary to add any chemical drugss.
Brief description
Accompanying drawing described herein is used for providing this utility model embodiment is further understood, and constitutes the one of the application Part, does not constitute the restriction to this utility model embodiment.In the accompanying drawings:
Fig. 1 is this utility model structural representation.
Labelling and corresponding parts title in accompanying drawing:
1- concentration tower air-introduced machine, 2- concentration tower, 3- spraying layer, 4- demister, 5- underflow case, 6- underflow box mixer, 7- Circulating pump, 8- underflow pump, 9- pressure filter, 10- waste water tank, 11- waste water box mixer, 12- waste water pump.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing, The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this Utility model, is not intended as to restriction of the present utility model.
Embodiment
As shown in figure 1, a kind of system processing desulfurization wastewater with fume afterheat, including concentration tower 2 and underflow case 5, described It is provided with spraying layer 3, underflow case 5 is simultaneously internal with concentration tower 2 and spraying layer 3 connects, and underflow case 5 is storage in concentration tower 2 Waste water after concentration, underflow case 5 is located at concentration tower 2 bottom with the connectivity part of concentration tower 2, concentration tower 2 offers and is passed through flue gas Through hole, flue gas passes through to concentrate top of tower through hole and enters and spraying layer 3, the vaporific desulfurization wastewater of ejection co-current contact in tower, So through hole is arranged on above spraying layer 3, both realizes co-current contact and processed, also increase time of contact and process time, place simultaneously Reason is more efficiently and thorough, is provided with circulating pump 7 outside concentration tower 2, and circulating pump 7 and concentration tower 2 junction have two, wherein One be located at below spraying layer 3 be directly internal with concentration tower 2 connect, another up through after outer wall with concentration tower 2 in The spraying layer 3 in portion connects, and in concentration tower 2, the waste water positioned at spraying layer 3 lower section enters spraying layer 3 ejection by circulation 7 pumps and realizes Go downstream contact, makes the continuous circulating and evaporating of waste water, and is provided with waste water tank 10 outside concentration tower 2, waste water tank 10 and dense It is provided with waste water pump 12 between contracting tower 2, and waste water pump 12 is connected with waste water tank 10 and concentration tower 2 simultaneously, set in concentration tower outlet Put demister 4, reduce the drop that flue gas machinery carries, demister 4 connect with concentration tower 2 and flue simultaneously, demister 4 and concentration The connectivity part of tower 2 is located at below spraying layer 3, and demister 4 and the connectivity part of concentration tower 2 are located in circulating pump 7 and concentration tower 2 simultaneously Above the connectivity part in portion, outside concentration tower 2, be provided with concentration tower air-introduced machine 1, concentration tower air-introduced machine 1 one end with positioned at concentration tower 2 The through hole connection at top, the other end is connected with flue, is provided with waste water box mixer 11 in waste water tank 10, arranges in underflow case 5 There is underflow box mixer 6, be that the concentrated solution preventing partially crystallizable deposits, outside underflow case 5, be provided with pressure filter 9, pressure filter 9 He It is provided with underflow pump 8 between underflow case 2, and underflow pump 8 is connected with pressure filter 9 and underflow case 5 simultaneously, underflow case 5 interior part is tied Brilliant concentrated solution is pumped to pressure filter 9 by underflow and is compressed filtration treatment, concentrated solution after pressure filter 9 is suppressed, output Filter cake deliver to cure system, filtrate returns underflow case 5, and spraying layer 3 bottom is provided with 8 nozzles, and nozzle all with spraying layer 3 Internal connection.
The desulfurization wastewater coming from Gypsum Fibrosum cyclone is imported waste water tank 10, concentration tower 2 is entered by waste water pump 12;Concentration tower Waste water in 2 passes through circulating pump 7 and waste water is sent into spraying layer 3;The heat smoke being extracted using concentration tower air-introduced machine 1 in flue is entered In concentration tower 2;Heat smoke direct contact heat transfer in concentration tower 2 with the vaporific desulfurization wastewater being sprayed by spraying layer 3, makes vaporific de- Sulfur waste water evaporation and concentration, wherein dissolving material form crystallization concentrated solution;Heat smoke after contacting with vaporific desulfurization wastewater is changed into wet Flue gas, is exported by concentration tower 2 and returns in flue through demister 4;Vaporific desulfurization wastewater after contacting with heat smoke is changed into part The concentrated solution of crystallization, is stored in the underflow case 5 of concentration tower bottom;Concentrated solution delivers to pressure filter 9 by underflow pump 8;Pressure filter 9 Leach mud cake, deliver to cure system, filtrate returns underflow case 5.
Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect One step describes in detail, be should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, equivalent replaces Change, improve, should be included within protection domain of the present utility model.

Claims (9)

1. a kind of fume afterheat processes the system of desulfurization wastewater it is characterised in that including concentration tower(2)With underflow case(5), institute State concentration tower(2)In be provided with spraying layer(3), underflow case(5)Simultaneously with concentration tower(2)Inside and spraying layer(3)Connection, dense Contracting tower(2)On offer the through hole being passed through flue gas, and through hole is arranged on spraying layer(3)Top, in concentration tower(2)Outside setting There is circulating pump(7), circulating pump(7)Simultaneously with concentration tower(2)Inside and spraying layer(3)Connection, and circulating pump(7)With concentration tower (2)Internal connectivity part is located at spraying layer(3)Lower section.
2. a kind of fume afterheat according to claim 1 processes the system of desulfurization wastewater it is characterised in that described concentration Tower(2)Outside is provided with waste water tank(10), waste water tank(10)And concentration tower(2)Between be provided with waste water pump(12), and waste water pump (12)Simultaneously with waste water tank(10)And concentration tower(2)Connection.
3. a kind of fume afterheat according to claim 1 processes the system of desulfurization wastewater it is characterised in that described concentration Tower(2)Outside is provided with demister(4), demister(4)Simultaneously with concentration tower(2)Connect with flue.
4. a kind of fume afterheat according to claim 3 processes the system of desulfurization wastewater it is characterised in that described demisting Device(4)With concentration tower(2)Connectivity part be located at spraying layer(3)Lower section, demister simultaneously(4)With concentration tower(2)Connectivity part position In circulating pump(7)With concentration tower(2)Above internal connectivity part.
5. a kind of fume afterheat according to claim 1 processes the system of desulfurization wastewater it is characterised in that described concentration Tower(2)Outside is provided with concentration tower air-introduced machine(1), concentration tower air-introduced machine(1)One end with positioned at concentration tower(2)The through hole at top is even Logical, the other end is connected with flue.
6. a kind of fume afterheat according to claim 2 processes the system of desulfurization wastewater it is characterised in that described waste water Case(10)In be provided with waste water box mixer(11).
7. a kind of fume afterheat according to claim 1 processes the system of desulfurization wastewater it is characterised in that described underflow Case(5)In be provided with underflow box mixer(6).
8. a kind of fume afterheat according to claim 1 processes the system of desulfurization wastewater it is characterised in that described underflow Case(5)Outside is provided with pressure filter(9), pressure filter(9)With underflow case(5)Between be provided with underflow pump(8), and underflow pump(8) Simultaneously with pressure filter(9)With underflow case(5)Connection.
9. a kind of system processing desulfurization wastewater with fume afterheat as claimed in any of claims 1 to 8, its feature It is, described spraying layer(3)Bottom is provided with several nozzles, and nozzle is all and spraying layer(3)Internal connection.
CN201620971546.6U 2016-08-30 2016-08-30 System for with surplus thermal treatment desulfurization waste water of flue gas Active CN205973869U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106145230A (en) * 2016-08-30 2016-11-23 成都锐思环保技术股份有限公司 A kind of fume afterheat processes the system and method for desulfurization wastewater
CN109052530A (en) * 2018-07-19 2018-12-21 江苏京源环保股份有限公司 A kind of integral type drying tower for fume afterheat processing desulfurization wastewater
WO2022032866A1 (en) * 2020-08-14 2022-02-17 西安西热锅炉环保工程有限公司 Desulfurization wastewater zero discharge treatment method and system suitable for multiple working conditions

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106145230A (en) * 2016-08-30 2016-11-23 成都锐思环保技术股份有限公司 A kind of fume afterheat processes the system and method for desulfurization wastewater
WO2018040852A1 (en) * 2016-08-30 2018-03-08 成都锐思环保技术股份有限公司 System and method for treating desulfurization wastewater using flue gas waste heat
CN109052530A (en) * 2018-07-19 2018-12-21 江苏京源环保股份有限公司 A kind of integral type drying tower for fume afterheat processing desulfurization wastewater
WO2022032866A1 (en) * 2020-08-14 2022-02-17 西安西热锅炉环保工程有限公司 Desulfurization wastewater zero discharge treatment method and system suitable for multiple working conditions

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: System and method for treating desulfurization wastewater by using flue gas waste heat

Effective date of registration: 20190806

Granted publication date: 20170222

Pledgee: China Minsheng Banking Corp Chengdu branch

Pledgor: Chengdu Rui Si green technology limited-liability company

Registration number: Y2019510000001