CN104591435B - A kind of processing method of industrial wastewater - Google Patents
A kind of processing method of industrial wastewater Download PDFInfo
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- CN104591435B CN104591435B CN201510001370.1A CN201510001370A CN104591435B CN 104591435 B CN104591435 B CN 104591435B CN 201510001370 A CN201510001370 A CN 201510001370A CN 104591435 B CN104591435 B CN 104591435B
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Abstract
The invention belongs to sewage treatment area, relate to the processing method of a kind of industrial wastewater, the method includes primary precipitation, displacement reaction, two-stage precipitation, ammonia aeration, recovery ammonia step, sulfate radical clearance in industrial wastewater is up to 80%, ammonia nitrogen removal frank is up to 90%, it is particularly suited for the process of high-concentration sulfuric acid ammonium waste water, solves calcium sulfate scaling occluding device and pipeline in conventional precipitation method simultaneously, increase a difficult problem for operating load.
Description
Technical field
The invention belongs to sewage treatment area, relate to the processing method of a kind of industrial wastewater, be specifically related to a kind of ammonium sulfate waste water
Processing method.
Background technology
Substantial amounts of high-concentration sulfuric acid ammonia waste water can be produced, such waste water sulfur in the industrial processes such as chemical industry, medicine, papermaking
Acid group and ammonia nitrogen concentration are too high, enter water body necessarily environment is caused severe contamination if dealing with improperly.High-concentration sulfuric acid ammonium waste water
Because its sulfate concentration and ammonia nitrogen concentration are too high and be unsuitable for Biochemical method,
At present, the preprocess method for high-concentration sulfuric acid ammonium waste water has evaporative crystallization, decrease temperature crystalline, conventional precipitation method, ammonia
Stripping.Wherein evaporation crystallization equipment investment is high, energy consumption is big, and condition requires more harsh；Lowering temperature crystallization needs low-temperature operation,
And repeated must carry out repeatedly decrease temperature crystalline, complex steps；Conventional precipitation method is that the Calx adding excess in waste water forms sulfur
Acid calcium deposit, causes remaining substantial amounts of calcium ion in waste water；Ammonia aeration is the common method processing high ammonia-nitrogen wastewater at present, but
Calcium sulfate scaling blocking ammonia aeration equipment that time often because removing sulfate radical, the excessive calcium ion of remaining is formed and pipeline, cause biography
Matter resistance, increases operating load.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of industrial wastewater containing high-concentration sulfuric acid ammonium waste water
Processing method, effectively reduces sulfate radical in waste water concentration and ammonia nitrogen concentration, and the introducing of sodium carbonate simultaneously is conducive to removing in waste water
A large amount of calcium ions of remaining, thus solve calcium sulfate scaling blocking ammonia aeration equipment and the pipeline that conventional precipitation method faces,
Cause resistance to mass tranfer, increase a difficult problem for operating load.
To achieve these goals, the technical solution used in the present invention is:
A kind of processing method of industrial wastewater, comprise the steps: primary precipitation, displacement reaction, two-stage precipitation, ammonia aeration,
Recovery ammonia.
Preferably, described primary precipitation adds precipitant, described displacement reaction adds displacer.
Preferably, described precipitant is calcium lime powder or lime cream, and described displacer is sodium carbonate, magnesium carbonate, zinc carbonate
One or a combination thereof.
Preferably, described precipitant is calcium lime powder, and described displacer is sodium carbonate.
Preferably, the processing method of a kind of industrial wastewater, comprise the steps:
(1) industrial wastewater enters primary clarifier through sewage conduct, adds calcium lime powder, opens stirring and reacts, reaction
Closing stirring after 10-30 minute, staticly settle 1～2 hour, the calcium sulfate precipitation of generation is sunken at the bottom of pond, and supernatant is through soil pipe
Road enters displacement reaction pond.
In above-mentioned steps, the dosage of calcium lime powder regards SO in waste water4 2-Mass concentration depending on, SO in calcium lime powder and waste water4 2-
Mass concentration ratio be 1.10-1.80.
(2) industrial wastewater processed through step (1) enters displacement reaction pond, adds sodium carbonate, open in displacement reaction pond
Opening stirring and carry out displacement reaction, close stirring after reacting 15-40 minute, industrial wastewater enters second-level settling pond through sewage conduct.
In above-mentioned steps, the dosage of sodium carbonate regarding add calcium lime powder mass concentration depending on, sodium carbonate and calcium lime powder
Mass concentration ratio be 0.5-1.0.
(3) industrial wastewater processed through step (2) staticly settles 1-2 hour in second-level settling pond, the calcium carbonate of generation
Being sunken at the bottom of pond, supernatant enters Ammonia blowing-out tower through sewage conduct.
(4) after the industrial wastewater liquid adjusting PH with base that step (3) processes, enter Ammonia blowing-out tower through sewage conduct, react 3-8
After hour, stripping ammonia out enters recovery ammonia tower after pipeline is collected.
In above-mentioned steps, regulate pH to 10～12, stripping temperature 40～50 DEG C.
(5) industrial wastewater processed through step (4) enters subsequent wastewater treatment system, and ammonia enters recovery ammonia tower, with dilute
Sulphuric acid is ammonia absorbing liquid, reclaims ammonium sulfate.
Industrial wastewater of the present invention is preferably the ammonium sulfate waste water of high concentration.
Technical solution of the present invention can be greatly lowered sulfate radical and ammonia nitrogen concentration in industrial wastewater, is particularly suited for containing high concentration sulfur
Acid group and the industrial wastewater of ammonia nitrogen.The introducing of carbonate of the present invention achieves following unforeseeable effect:
1, compared with conventional precipitation method, lime consumption is few, it is to avoid a large amount of feeding limes cause in waste water remaining substantial amounts of calcium from
Son thus solve the calcium sulfate scaling blocking subsequent processing device and pipeline that conventional precipitation method faces, cause resistance to mass tranfer,
Increase a difficult problem for operating load.
2, the introducing of carbonate, owing to carbonate and calcium ion can be in conjunction with generating the precipitation of calcium carbonate of more indissoluble, the most in a large number
Decreasing the calcium ion concentration of residual in waste water, meanwhile, carbonate and part are the calcium sulfate generation displacement reaction of slightly soluble state,
Reduce the calcium ion concentration of residual in waste water further.
3, by the sulfate radical intermediate processing improved, having filled up the blank that ammonium sulfate waste water processes, it is unsuitable because of excessive concentration to make
Carry out Biochemical method, and the ammonium sulphate being difficult to because concentration is too low use the recovery process such as evaporation, decrease temperature crystalline to process gives up
Water is effectively processed.
4, ammonia aeration efficiency is improved, owing in waste water, the calcium ion concentration of remaining is substantially reduced, and ammonia aeration equipment and pipeline
Fouling and clogging problem be addressed, therefore the soda pop resistance to mass tranfer of ammonia aeration reduces, and power consumption and heat consumption reduce,
Operating cost reduces.
5, SO during the dosage of calcium lime powder regards waste water4 2-Mass concentration depending on, the dosage of sodium carbonate regard add quick lime
Depending on the mass concentration of powder, suitable dosage and add the ratio use cost not only having saved medicament, and it is more beneficial for raw
Become calcium sulfate precipitation and this precipitation of carbonic acid, while maximized reduction sulfate radical in waste water concentration, avoid equipment pipe fouling
Blockage problem.
6, the process for treating industrial waste water of the present invention, can be used for existing use conventional precipitation method and goes to the sewage treatment plant of sulfate radical
Process modification, only need to increase displacement reaction pond and can improve waste water and process and solve scale problems, therefore have wide should
Use prospect.
In order to the present invention processing method to industrial wastewater is intuitively described, with reference to accompanying drawing 1, for the process flow diagram of the present invention.
Accompanying drawing explanation
Accompanying drawing 1 industrial wastewater treatment scheme of the present invention
Detailed description of the invention:
Hereinafter will further illustrate the present invention by specific embodiment, it will be understood by those skilled in the art that the present invention is concrete
Embodiment also limits the present invention never in any form, and the most any equivalent each falls within scope
Within.
The conventional precipitation treatment method of embodiment 1 and the contrast test of processing method of the present invention
The ammonium sulfate waste water produced with certain pharmacy corporation is as subjects, and test is divided into two groups, respectively matched group and test group,
Matched group uses " conventional precipitation, ammonia aeration, recovery ammonia " to process technique, the test group employing present invention " primary precipitation,
Displacement reaction, two-stage precipitation, ammonia aeration, recovery ammonia " process technique, comparative test result is shown in Table 1
Table 1: comparative test result compares
By table 1 data, it can be deduced that as drawn a conclusion:
On the premise of the added amount of chemical gross mass of two groups is identical, i.e. matched group calcium lime powder consumption is and SO in waste water4 2-Matter
Amount concentration ratio is 1.93, and experimental group calcium lime powder consumption is and SO in waste water4 2-Mass concentration ratio be 1.28, sodium carbonate amount
Being 0.5 for the mass concentration ratio with calcium lime powder, experimental group is to SO4 2-Clearance higher than matched group 15.2%, experimental group pair
NH3-N clearance is higher than matched group 3.2%.Therefore, experimental group on the premise of not increasing medicament usage amount to ammonium sulfate waste water
Treatment effect more preferable.
Embodiment 2 the method for the invention processes the pilot plant test of ammonium sulfate waste water
Take certain chemical enterprise ammonium sulfate waste water and carry out pilot plant test, this waste water SO4 2-Concentration is 5500mg/L, NH3-N concentration is
2650mg/L, COD concentration be 4232mg/L, pH be 3.0, process of the test is as follows:
Ammonium sulfate waste water enters primary clarifier, adds calcium lime powder 6.5g/L, opens stirring and reacts, reacts 20 minutes
Rear closedown is stirred, and staticly settles 1 hour, and the calcium sulfate precipitation of generation is sunken at the bottom of pond, and supernatant enters displacement reaction pond；To
Displacement reaction pond adds sodium carbonate 3.5g/L, opens stirring and carry out displacement reaction, after reacting 30 minutes, close stirring, waste water
Entering second-level settling pond, staticly settle 1 hour, the precipitation of calcium carbonate of generation is sunken at the bottom of pond, supernatant liquid adjusting PH with base to 11
Rear entrance Ammonia blowing-out tower；Stripping temperature is 50 DEG C, and after stripping reacts 4 hours, stripping ammonia out collects heel row through pipeline
Entering recovery ammonia tower and reclaim ammonium sulfate, the industrial wastewater of process detects.The water outlet taking each processing unit carries out SO4 2-Concentration,
NH3-N concentration and the detection of COD concentration, result is as follows:
Claims (4)
1. the processing method of an industrial wastewater, it is characterised in that comprise the following steps:
(1) primary precipitation: industrial wastewater enters primary clarifier through sewage conduct, adds calcium lime powder, opens stirring and carries out instead
Should, to close stirring after reacting 10-30 minute, staticly settle 1～2 hour, the calcium sulfate precipitation of generation is sunken at the bottom of pond, supernatant warp
Sewage conduct enters displacement reaction pond；
(2) displacement reaction: the industrial wastewater processed through step (1) enters displacement reaction pond, adds carbon in displacement reaction pond
Acid sodium, opens stirring and carries out displacement reaction, closes stirring after reacting 15-40 minute, and industrial wastewater enters two grades through sewage conduct and sinks
Pond, shallow lake；
(3) two-stage precipitation: the industrial wastewater processed through step (2) staticly settles 1-2 hour in second-level settling pond, generation
Precipitation of calcium carbonate is sunken at the bottom of pond, and supernatant enters Ammonia blowing-out tower through sewage conduct；
(4) ammonia aeration: enter Ammonia blowing-out tower through sewage conduct after the industrial wastewater liquid adjusting PH with base that step (3) processes, instead
After answering 3-8 hour, stripping ammonia out enters recovery ammonia tower after pipeline is collected；
(5) recovery ammonia: the industrial wastewater processed through step (4) enters subsequent wastewater treatment system, and ammonia enters recovery ammonia tower,
With dilute sulfuric acid for ammonia absorbing liquid, reclaim ammonium sulfate；Described industrial wastewater is ammonium sulfate waste water.
2. the processing method of industrial wastewater as claimed in claim 1, it is characterised in that the dosage of calcium lime powder in step (1)
Depending on SO in waste water4 2-Mass concentration depending on, SO in calcium lime powder and waste water4 2-Mass concentration ratio be 1.10-1.80.
3. the processing method of industrial wastewater as claimed in claim 1, it is characterised in that in step (2), the dosage of sodium carbonate regards
Depending on the mass concentration of the calcium lime powder added, sodium carbonate is 0.5-1.0 with the mass concentration ratio of calcium lime powder.
4. the processing method of industrial wastewater as claimed in claim 1, it is characterised in that regulation pH to 10～12 in step (4),
Stripping temperature 40～50 DEG C.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105174287A (en) * | 2015-09-09 | 2015-12-23 | 江西玛德精细化学工业有限公司 | Method for recovering ammonia and coproducing calcium sulfate through lime neutralization of T acid mother liquid |
| CN105541672B (en) * | 2015-12-15 | 2017-06-20 | 浙江闰土研究院有限公司 | A kind of process for cleanly preparing of dye dispersant MF |
| CN108328789A (en) * | 2018-01-30 | 2018-07-27 | 成都信息工程大学 | A kind of synchronous method for removing sulfate and ammonia nitrogen in smelting wastewater |
| CN112777708A (en) * | 2019-11-06 | 2021-05-11 | 江苏普源化工有限公司 | Treatment method of salicylic acid production wastewater |
| CN112777707A (en) * | 2019-11-06 | 2021-05-11 | 江苏普源化工有限公司 | Treatment method of wastewater containing sodium sulfate |
| CN111423025B (en) * | 2020-05-22 | 2023-07-28 | 河南心连心化学工业集团股份有限公司 | Treatment device and treatment method for by-product ammonium sulfate in condensate decarburization |
| CN112225228A (en) * | 2020-09-29 | 2021-01-15 | 长沙中硅环保科技有限公司 | Method and system for preparing ammonium sulfate by using cement kiln tail waste gas and phosphogypsum |
| CN114195290A (en) * | 2021-12-13 | 2022-03-18 | 唐山三友集团兴达化纤有限公司 | Method for retarding scaling in viscose fiber wastewater treatment process by using purified sodium hydrosulfide byproduct |
| CN115259500A (en) * | 2022-08-18 | 2022-11-01 | 中原环保股份有限公司 | Method for treating ammonium nitrate industrial wastewater |
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| CN1736908A (en) * | 2005-08-01 | 2006-02-22 | 陈昆柏 | Method and system for harnessing consumer waste landfill percolate |
| CN102115284A (en) * | 2011-01-21 | 2011-07-06 | 重庆武陵锰业有限公司 | Method for treating manganese-containing wastewater generated during electrolytic manganese processing |
| CN103435237A (en) * | 2013-09-22 | 2013-12-11 | 卢长兴 | Pharmaceutical sewage treatment process |
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| JP2005193167A (en) * | 2004-01-08 | 2005-07-21 | Sophia Co Ltd | Drainage purification method and purification method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1736908A (en) * | 2005-08-01 | 2006-02-22 | 陈昆柏 | Method and system for harnessing consumer waste landfill percolate |
| CN102115284A (en) * | 2011-01-21 | 2011-07-06 | 重庆武陵锰业有限公司 | Method for treating manganese-containing wastewater generated during electrolytic manganese processing |
| CN103435237A (en) * | 2013-09-22 | 2013-12-11 | 卢长兴 | Pharmaceutical sewage treatment process |
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Effective date of registration: 20160624 Address after: 100000 Beijing City Mafang Shunyi District lumber Town East Village 500 meters Applicant after: Huang Yubao Address before: 276017 No. 56 Industrial Street, Luozhuang District, Shandong, Linyi Applicant before: Liu Shuqin |
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