CN206127018U - Pretreatment systems suitable for thermal power plant's desulfurization waste water - Google Patents
Pretreatment systems suitable for thermal power plant's desulfurization waste water Download PDFInfo
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- CN206127018U CN206127018U CN201621140137.8U CN201621140137U CN206127018U CN 206127018 U CN206127018 U CN 206127018U CN 201621140137 U CN201621140137 U CN 201621140137U CN 206127018 U CN206127018 U CN 206127018U
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Abstract
The utility model discloses a pretreatment systems suitable for thermal power plant's desulfurization waste water, include: three header reaction tanks are including being used for carrying on initial response pond that the neutralization precipitates, being used for carrying on the second reaction tank that sulphide precipitates and being used for mixing and congealing the third response pond of reacting, alkaline reagents dosing tank with initial response pond intercommunication, organic sulfur compound dosing tank with second reaction tank intercommunication, flocculating agent dosing tank, coagulant aid dosing tank with third response pond intercommunication, a second -stage reaction tank for going on physical absorption, adsorbent dosing tank with the second -stage reaction tank intercommunication, be used for malactic third -stage reaction pond, sodium sulphate dosing tank, lime breast dosing tank with third -stage reaction pond intercommunication, a concentrated depositing reservoir, three header reaction tanks, second -stage reaction tank, third -stage reaction pond, concentrated depositing reservoir feed through in proper order for going on the precipitation separation . the utility model discloses easy scale deposit compositions such as heavy metal and calcium ion in the desulfurization waste water, magnesium ion can be effectively got rid of, the running cost can also be reduced.
Description
Technical field
This utility model is related to heat-engine plant desulfurized Waste Water Treatment structure-design technique field, espespecially a kind of to be applied to fire
The pretreatment system of power plant desulfurization waste water.
Background technology
Afterwards in a very long time, the energy resource structure of China determines that coal-fired thermal power generation is China's energy resource supply
Main source.As a large amount of calcinings of the fossil feedstocks such as coal, thermal power plant can discharge substantial amounts of sulfur dioxide, bring serious big
Gas pollution problem.
In existing numerous fume desulphurization methods, limestone (Calx)-gypsum wet flue gas desulfurizing is most widely used
Desulfurization technology, have the advantages that equipment is simple, desulphurization reaction speed is fast, desulfuration efficiency is high.The method adopts calcium-base absorbing agent
(limestone or Calx) can produce desulfurization wastewater as desulfurizing agent, while the sulfur dioxide in flue gas is eliminated.
State Council was issued in 2015《Water pollution action plan》(《Ten, water》), it means that country is by reinforcing to each
The management of class water pollution, desulfurization wastewater complicated component, contains heavy metal, and directly discharge can cause serious water pollution.Such as
What economical and efficient ground processes desulfurization wastewater, realizes the reuse of useful resources in waste water, and then reaches the zero-emission of desulfurization wastewater, is
Realize the only way of sustainable development, and the important directions of following desulfurization wastewater systematic study in thermal power plant.
Therefore, the applicant is devoted to providing a kind of pretreatment system suitable for heat-engine plant desulfurized waste water.
Utility model content
The purpose of this utility model is to provide a kind of pretreatment system suitable for heat-engine plant desulfurized waste water, its structure letter
It is single, the pollutant such as heavy metal in desulfurization wastewater can be removed, calcium ion in desulfurization wastewater, magnesium ion etc. can also be removed easily
Fouling components, so as to can effectively prevent equipment scaling in the process of the successive depths of desulfurization wastewater, furthermore it is also possible to reduce fortune
Row cost.
To solve above-mentioned technical problem, this utility model provides a kind of pretreatment system suitable for heat-engine plant desulfurized waste water
System, including：Three header reaction tanks, the three headers reaction tank include for be neutralized precipitation the first reaction tank, be used for into
Second reaction tank of row sulfide precipitation and the 3rd reaction tank for carrying out coagulating, and first reaction tank, second
Reaction tank and the 3rd reaction tank are sequentially communicated；For adding the alkaline reagent dosing tank of alkaline reagent；For adding sulfide
Organic sulfur compound dosing tank；For adding the flocculant dosing tank of flocculant；For adding the flocculation aid dosing tank of flocculation aid；With
In the secondary response pond for carrying out physical absorption；For adding the adsorbent dosing tank of adsorbent；For softening the three of desulfurization wastewater
Order reaction pond；For adding the sodium sulfate dosing tank of sodium sulfate；For adding the lime milk dosing case of lime cream；For being sunk
Form sediment detached concentrating clarifying pond.
Wherein, the outlet guide of the three headers reaction tank leads to and is connected to the secondary response pond, the secondary response pond
Outlet guide leads to and is connected to the third-order reaction pond, and the outlet guide in the third-order reaction pond leads to and is connected to the concentrating clarifying pond, institute
State concentrating clarifying pond and there is first outlet and second outlet, the first outlet is used for tapping, and the second outlet is used for
Derive solid impurity.
The outlet guide of the alkaline reagent dosing tank leads to and is connected to first reaction tank, the organic sulfur compound dosing tank
Outlet guide lead to and be connected to the outlet guide of second reaction tank, the flocculant dosing tank and flocculation aid dosing tank and lead to and be connected to
3rd reaction tank, the adsorbent dosing tank outlet guide lead to and are connected to secondary response pond, the sodium sulfate dosing tank, Calx
The outlet of newborn dosing tank is both turned on connecting the third-order reaction pond.
Preferably, the system also includes：Compressor, is connected with the third-order reaction pond, for compressing neat stress defeated
Deliver in the third-order reaction pond.
Preferably, the medicament that the alkaline reagent dosing tank adds in first reaction tank is lime cream；And/or；
The medicament that the organic sulfur compound dosing tank adds in second reaction tank is organic sulfur TMT-15；And/or；The flocculation
The medicament that agent dosing tank adds in the 3rd reaction tank is PAFS, and feeding quantity is 2.5mL/L, described to help solidifying
The medicament that agent dosing tank adds in the 3rd reaction tank is polyacrylamide, and feeding quantity is 2.0mL/L.
Preferably, the adsorbent of the adsorbent dosing tank addition is natural zeolite or modified zeolite.
Preferably, the system also includes：Clear water tanks, are connected with the concentrating clarifying pond；PH-meter, is arranged on described
Between concentrating clarifying pond and clear water tanks.
Preferably, the first outlet in the concentrating clarifying pond is arranged on above the bottom of pond in the concentrating clarifying pond.
Preferably, in the three headers reaction tank set in the first reaction tank, the second reaction tank and the 3rd reaction tank respectively
There is agitator, in the secondary response pond, third-order reaction pond and concentrating clarifying pond, be also respectively equipped with agitator.
Pretreatment system suitable for heat-engine plant desulfurized waste water of the present utility model can realize that following any one is beneficial
Effect.
1st, pretreatment system of the present utility model can adopt the side that chemical precipitation method is combined with physisorphtion process
Formula processing desulfurization wastewater, so as to effectively remove the heavy metal ion in desulfurization wastewater, wherein, flocculation reaction can precipitate a large amount of outstanding
Float, reduces water turbidity.
2nd, pretreatment system of the present utility model will be passed in third-order reaction pond to enter in desulfurization neat stress by compressor
Row aeration, CO therein2Gas carries out sofening treatment to desulfurization wastewater, so as to effectively remove the calcium ion in desulfurization wastewater, magnesium
The easily fouling components such as ion, are conducive to being smoothed out for follow-up desulfurization wastewater advanced treating, in addition, comparing traditional Calx-pure
Alkali tenderizer, so arranges and medicament expense use can be greatly reduced, so as to further reduce the operating cost of system.
3rd, for natural zeolite and modified zeolite, both adsorb the adsorbent adopted in pretreatment system of the present utility model
Agent can effectively remove the heavy metal ion in desulfurization wastewater, also, both material sources are extensive, cheap, so as to
Reduce further the operating cost of system.
Description of the drawings
With reference to the accompanying drawings and detailed description this utility model is described in further detail：
Fig. 1 is a kind of knot of specific embodiment of the pretreatment system suitable for heat-engine plant desulfurized waste water of the present utility model
Structure schematic diagram.
Drawing reference numeral explanation：
Three header reaction tanks 100, the first reaction tank 110, alkaline reagent dosing tank 111, the second reaction tank 120, organic sulfur
Compound dosing tank 121, the 3rd reaction tank 130, flocculant dosing tank 131, flocculation aid dosing tank 132；Secondary response pond 200, inhales
Attached dose of dosing tank 210；Third-order reaction pond 300, sodium sulfate dosing tank 310, lime milk dosing case 320；Concentrating clarifying pond 400；Pressure
Contracting machine 500；Clear water tanks 610, pH-meter 620.
Specific embodiment
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or accompanying drawing to be used is briefly described needed for description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise for not paying creative work
Under, can be with according to these other accompanying drawings of accompanying drawings acquisition.
As shown in figure 1, this specific embodiment discloses a kind of pretreatment system suitable for heat-engine plant desulfurized waste water, bag
Include：Three header reaction tanks 100, three header reaction tanks 100 include for be neutralized precipitation the first reaction tank 110, be used for into
Second reaction tank 120 of row sulfide precipitation and the 3rd reaction tank 130 for carrying out coagulating, and the first reaction tank 110,
Second reaction tank 120 and the 3rd reaction tank 130 are sequentially communicated；For adding the alkaline reagent dosing tank 111 of alkaline reagent；For
The organic sulfur compound dosing tank 121 of addition sulfide；For adding the flocculant dosing tank 131 of flocculant；Help solidifying for addition
The flocculation aid dosing tank 132 of agent；For carrying out the secondary response pond 200 of physical absorption；Adsorbent for adding adsorbent adds
Medicine-chest 210；For softening the third-order reaction pond 300 of desulfurization wastewater；For adding the sodium sulfate dosing tank 310 of sodium sulfate；For
The lime milk dosing case 320 of addition lime cream；For carrying out the concentrating clarifying pond 400 of precipitate and separate.
The outlet guide of three header reaction tanks 100 leads to and is connected to secondary response pond 200, the outlet conducting in secondary response pond 200
It is connected to third-order reaction pond 300, the outlet guide in third-order reaction pond 300 leads to and is connected to concentrating clarifying pond 400, concentrating clarifying pond 400
With first outlet and second outlet, first outlet is used for tapping, and second outlet is used to derive solid impurity.
The outlet guide of alkaline reagent dosing tank 111 leads to and is connected to the first reaction tank 110, organic sulfur compound dosing tank 121
Outlet guide leads to and is connected to the outlet guide of the second reaction tank 120, flocculant dosing tank 131 and flocculation aid dosing tank 132 and leads to and be connected to
3rd reaction tank 130,210 outlet guide of adsorbent dosing tank lead to and are connected to secondary response pond 200, sodium sulfate dosing tank 310, Calx
The outlet of newborn dosing tank 320 is both turned on connecting third-order reaction pond 300.
Specifically, system also includes：Compressor 500, is connected with third-order reaction pond 300, for compressing neat stress and conveying
Into third-order reaction pond 300.CO in the neat stress that desulfurizing tower is discharged2Content be generally 8%-18%, neat stress is through compression
It is passed through in desulfurization wastewater after machine compression, while add lime cream and sodium sulfate in third-order reaction pond, so as to effectively remove desulfurization
Magnesium ion and calcium ion in waste water.
Specifically, alkaline reagent dosing tank 111 is lime cream to the medicament that the first reaction tank 110 adds；Organic sulfur compound
The medicament that dosing tank 121 adds in the second reaction tank 120 is organic sulfur TMT-15；Flocculant dosing tank 131 is to the 3rd reaction
The medicament added in pond 130 is PAFS, and feeding quantity is 2.5mL/L, and flocculation aid dosing tank 132 is to the 3rd reaction tank
The medicament added in 130 is polyacrylamide, and feeding quantity is 2.0mL/L.So arranging can make desulfurization wastewater in three headers
Most heavy metal in desulfurization wastewater is removed in reaction tank, the turbidity of desulfurization wastewater is effectively reduced.
In the present embodiment, the adsorbent of the addition of adsorbent dosing tank 210 is modified zeolite, and specially NaCl is modified to boil
Stone, its modifying process is：The mass ratio of natural zeolite and NaCl is 1:2, neutrality is washed with distilled water to after stirring in water bath, then
Drying, it is possible to obtain NaCl modified zeolites.
Pretreatment system also includes in the present embodiment：Clear water tanks 610, are connected with concentrating clarifying pond 400；PH-meter
620, it is arranged between the concentrating clarifying pond 400 and clear water tanks 610.That is, the liquid flow in concentrating clarifying pond 400 is arrived
Before clear water tanks, need to reconcile pH to neutrality through pH-meter 620, so as to the liquid peracid that avoids collecting in clear water tanks or mistake
Alkali.
Specifically, the first outlet in concentrating clarifying pond 400 is arranged on above the bottom of pond in concentrating clarifying pond 400, is so arranged
During the supernatant in concentrating clarifying pond 400 can be made from first outlet overflow to clear water tanks, so that in concentrating clarifying pond
Float and colloid are more fully deposited to bottom of pond.
Specifically, in three header reaction tanks 100 the first reaction tank 110, the second reaction tank 120 and the 3rd reaction tank 130
In be respectively equipped with agitator, be also respectively equipped with stirring in secondary response pond 200, third-order reaction pond 300 and concentrating clarifying pond 400
Device.By arranging agitator, carry out can the reaction in each reaction tank more abundant.
Of course, in other specific embodiments, the adsorbent in this utility model can also adopt natural zeolite or its
The modified zeolite of his species, for example：High temperature modified zeolite, modifying process is：Natural zeolite is after 400～450 ° of high-temperature calcinations；
Sour modified zeolite, modifying process：Natural zeolite is 5 with the mass ratio of hydrochloric acid:1, after stirring in water bath by distilled water wash into
Property, then dry, it is possible to obtain sour modified zeolite.
Additionally, the chemical reagent that pretreatment system of the present utility model adds in three header reaction tanks can be according to reality
Needs are adjusted；Compressor can be arranged with selectivity；Special CO can be selected2Supplying tank is to the liquid in third-order reaction pond
Carry out aeration；Clear water tanks, pH-meter selectivity can be arranged as needed, and here is omitted.
Exemplary, as shown in figure 1, the enforcement of the pretreatment system suitable for heat-engine plant desulfurized waste water of the present utility model
The concrete application situation of example is as follows：
1st, neutralization precipitation：Pending desulfurization wastewater enters the first reaction tank 110, adds lime milk solution, adjusts first
The pH of solution to 9 in reaction tank 110, is stirred by agitator, makes the Pb in water2+、Cd2+、Ni2+It is transformed into etc. heavy metal ion
The metal hydroxide form of insoluble or indissoluble, then separated by precipitation；
2nd, sulfide precipitation：Desulfurization wastewater after neutralization precipitation is entered in the second reaction tank 120, adds organic sulfur TMT-
15, stirred by agitator, promote contents of many kinds of heavy metal ion and S2-Reaction generates the precipitate of solubility product very little, afterwards by heavy
Form sediment and separate；
3rd, coagulating：The desulfurization wastewater obtained after sulfide precipitation is entered in the 3rd reaction tank 130, adds flocculation aid
And coagulant, and stirred by agitator, wherein, flocculation aid selects polyacrylamide (PAM), and coagulant selects aluminium iron sulfate
(PAFS), and PAFS and PAM chemical feeding quantity be respectively 2.5mL/L, 2.0mL/L, wherein the preparation method of aluminium iron sulfate be alkali in
And copolymerization method, specifically with iron sulfate and aluminum sulfate as raw material, according to n (Al3+)：n(Fe3+)=2：3 ratio prepares polyaluminum sulfate
Ferro-aluminum (PAFS), by coagulating, can reduce the turbidity of desulfurization wastewater；
4th, materialization absorption：Desulfurization wastewater after coagulating enters secondary response pond 200, Xiang Erji after filtration
Adsorbent, and centrifugation are added in reaction tank 200；
5th, sofening treatment：Desulfurization wastewater after materialization absorption is entered in third-order reaction pond 300, by compressor 500
To in third-order reaction pond 300 being passed through neat stress carries out aeration, while adding lime cream and sodium sulfate into third-order reaction pond 300；
The first step is reacted：Lime cream is reacted with the magnesium ion in desulfurization wastewater, and generates magnesium ion precipitate, while sulphuric acid
Sodium generates calcium sulfate precipitation with the calcium ion reaction in desulfurization wastewater, while generating sodium hydroxide.
Second step reacts：Carbon dioxide in the neat stress that compressor 500 is passed through continues anti-with the product of first step reaction
Should, precipitation of calcium carbonate is generated, so as to further remove calcium ion.
6th, concentrating clarifying：Desulfurization wastewater after sofening treatment enters concentrating clarifying pond 400, and concentrating clarifying pond 400 is to body refuse
Separated and concentrated, the longer time of staying can be obtained by controlling the upflow velocity of desulfurization wastewater, so that most of
For sludge, sludge is arranged from outside the second outlet Jing scum pump in concentrating clarifying pond 400, concentrating clarifying for float and colloidal precipitation concentration
Supernatant in pond 400 enters clear water tanks 610 by first outlet overflow, and supernatant is also have passed through into before clear water tanks 610
PH-meter 620 is adjusting the pH value of supernatant.
Pre-treatment step letter of the pretreatment system suitable for heat-engine plant desulfurized waste water of the present utility model to desulfurization wastewater
Single, simple operation, it is possible to achieve the qualified discharge of heavy metal ion in desulfurization wastewater, at the same processed calcium in desulfurization wastewater from
The easily fouling components such as son, magnesium ion, can effectively prevent equipment scaling, in the successive depths of desulfurization wastewater are processed so as to reach
Preferable pretreating effect.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model principle, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (7)
1. a kind of pretreatment system suitable for heat-engine plant desulfurized waste water, it is characterised in that include：
Three header reaction tanks, the three headers reaction tank include for be neutralized precipitation the first reaction tank,
For carrying out second reaction tank and the 3rd reaction tank for carrying out coagulating of sulfide precipitation,
And first reaction tank, the second reaction tank and the 3rd reaction tank are sequentially communicated；
For adding the alkaline reagent dosing tank of alkaline reagent；
For adding the organic sulfur compound dosing tank of sulfide；
For adding the flocculant dosing tank of flocculant；
For adding the flocculation aid dosing tank of flocculation aid；
For carrying out the secondary response pond of physical absorption；
For adding the adsorbent dosing tank of adsorbent；
For softening the third-order reaction pond of desulfurization wastewater；
For adding the sodium sulfate dosing tank of sodium sulfate；
For adding the lime milk dosing case of lime cream；
For carrying out the concentrating clarifying pond of precipitate and separate；
The outlet guide of the three headers reaction tank leads to and is connected to the secondary response pond, and the outlet guide in the secondary response pond leads to
It is connected to the third-order reaction pond, the outlet guide in the third-order reaction pond leads to and is connected to the concentrating clarifying pond, the concentrating clarifying
Pond has first outlet and second outlet, and the first outlet is used for tapping, and the second outlet is miscellaneous for deriving solid
Matter；
The outlet guide of the alkaline reagent dosing tank leads to and is connected to first reaction tank, and the organic sulfur compound dosing tank goes out
Mouthful conducting be connected to the outlet guide of second reaction tank, the flocculant dosing tank and flocculation aid dosing tank lead to be connected to it is described
3rd reaction tank, the adsorbent dosing tank outlet guide lead to and are connected to secondary response pond, and the sodium sulfate dosing tank, lime cream add
The outlet of medicine-chest is both turned on connecting the third-order reaction pond.
2. the system as claimed in claim 1, it is characterised in that also include：
Compressor, is connected with the third-order reaction pond, for compressing neat stress and being delivered in the third-order reaction pond.
3. the system as claimed in claim 1, it is characterised in that：
The medicament that the alkaline reagent dosing tank adds in first reaction tank is lime cream；
And/or；
The medicament that the organic sulfur compound dosing tank adds in second reaction tank is organic sulfur TMT-15；
And/or；
The medicament that the flocculant dosing tank adds in the 3rd reaction tank be PAFS, the flocculation aid dosing
The medicament that case adds in the 3rd reaction tank is polyacrylamide.
4. the system as claimed in claim 1, it is characterised in that：
The adsorbent of the adsorbent dosing tank addition is natural zeolite or modified zeolite.
5. the system as claimed in claim 1, it is characterised in that also include：
Clear water tanks, are connected with the concentrating clarifying pond；
PH-meter, is arranged between the concentrating clarifying pond and clear water tanks.
6. the system as claimed in claim 1, it is characterised in that：
The first outlet in the concentrating clarifying pond is arranged on above the bottom of pond in the concentrating clarifying pond.
7. the system as claimed in claim 1, it is characterised in that：
Agitator is respectively equipped with the first reaction tank, the second reaction tank and the 3rd reaction tank in the three headers reaction tank, institute
Also agitator is respectively equipped with stating secondary response pond, third-order reaction pond and concentrating clarifying pond.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621140137.8U CN206127018U (en) | 2016-10-20 | 2016-10-20 | Pretreatment systems suitable for thermal power plant's desulfurization waste water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621140137.8U CN206127018U (en) | 2016-10-20 | 2016-10-20 | Pretreatment systems suitable for thermal power plant's desulfurization waste water |
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| CN108014444A (en) * | 2018-01-24 | 2018-05-11 | 东莞市升佳净水材料有限公司 | A kind of flying dust chelating agent and preparation method thereof |
| CN112537834A (en) * | 2020-12-23 | 2021-03-23 | 金川集团股份有限公司 | Method for removing heavy metal ions in wastewater |
| CN114230075A (en) * | 2021-12-16 | 2022-03-25 | 华能辛店发电有限公司 | System and method for preparing snow-melting agent by utilizing desulfurization wastewater and application |
| CN117142607A (en) * | 2023-10-16 | 2023-12-01 | 江苏乐尔环境科技股份有限公司 | Fly ash washing liquid pretreatment system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107601705A (en) * | 2017-09-26 | 2018-01-19 | 湖北大学 | A kind of combination stalk method removes the method and recovered liquid of suspension and toxic heavy metal and the application of recovered liquid in biogas slurry |
| CN107601705B (en) * | 2017-09-26 | 2019-11-22 | 湖北大学 | The method and recovered liquid of suspended matter and toxic heavy metal and the application of recovered liquid in a kind of combination stalk method removal biogas slurry |
| CN108014444A (en) * | 2018-01-24 | 2018-05-11 | 东莞市升佳净水材料有限公司 | A kind of flying dust chelating agent and preparation method thereof |
| CN112537834A (en) * | 2020-12-23 | 2021-03-23 | 金川集团股份有限公司 | Method for removing heavy metal ions in wastewater |
| CN114230075A (en) * | 2021-12-16 | 2022-03-25 | 华能辛店发电有限公司 | System and method for preparing snow-melting agent by utilizing desulfurization wastewater and application |
| CN114230075B (en) * | 2021-12-16 | 2024-05-07 | 华能辛店发电有限公司 | System, method and application for preparing snow-melting agent by utilizing desulfurization wastewater |
| CN117142607A (en) * | 2023-10-16 | 2023-12-01 | 江苏乐尔环境科技股份有限公司 | Fly ash washing liquid pretreatment system |
| CN117142607B (en) * | 2023-10-16 | 2024-04-19 | 江苏乐尔环境科技股份有限公司 | Fly ash washing liquid pretreatment system |
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