CN104096466B - A kind of method utilizing ardealite filtered wastewater to purify ardealite sulfur ammonium tail gas - Google Patents

A kind of method utilizing ardealite filtered wastewater to purify ardealite sulfur ammonium tail gas Download PDF

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CN104096466B
CN104096466B CN201410209338.8A CN201410209338A CN104096466B CN 104096466 B CN104096466 B CN 104096466B CN 201410209338 A CN201410209338 A CN 201410209338A CN 104096466 B CN104096466 B CN 104096466B
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ardealite
waste water
acid
filter
ammonia
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CN104096466A (en
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潘志云
杨毅
赵建勇
付勇
徐春
饶轶晟
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Wengfu Group Co Ltd
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Wengfu Group Co Ltd
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Abstract

The invention discloses a kind of method utilizing ardealite filter acid purification of waste water ardealite sulfur ammonium tail gas.The method adopts the ardealite slurry of phosphoric acid plant stock tank again to make raw material, it is filtered in the feeding area of ardealite rotary vacuum disk filter, obtain acid waste water, a part of acid waste water is got to scrubbing tower and makes the absorption liquid of ammonia-containing exhaust, ammonia-containing exhaust and acid waste water are after scrubbing tower absorbs, forming circulation fluid, cleaning mixture reaches spray-absorption on two-layer filler by circulating pump;Unnecessary acid waste water sends into phosphoric acid plant stock tank again along waste line;The dry slag of filter cake after filtration is sent to ardealite sulfur ammonium conversion reaction by belt and is done raw material use;Purified qualified tail gas is from scrubbing tower top exhaust chimney qualified discharge.Adopt the ammonia-contaminated gas that the method both recyclable ardealite sulfur ammonium ammonium sulfate of the present invention produces, phosphorus in recyclable ardealite acid waste water again, reduce environmental pollution and discharge of wastewater simultaneously, save production cost.

Description

A kind of method utilizing ardealite filtered wastewater to purify ardealite sulfur ammonium tail gas
Technical field
The present invention relates to cleaner Production in Chemical Industry technical field, relate to the purification method of the tail gas produced in ammonium sulfate production process furthermore, relate in particular to the purification method of a kind of ardealite Sulphuric acid ammonium ammonia-containing exhaust.
Background technology
Ammonia-contaminated gas discharge can affect and destroy the work of people, life, health, equipment, property and ecological environment.Reduce ammonia-contaminated gas discharge capacity, environmental pollution can not only be reduced, and production cost can be reduced.The ammonia-contaminated gas that carbonation process in ardealite Sulphuric acid ammonium production process, conversion procedure and filter progress produce sends into scrubbing tower through blower fan, the method adopting recirculated water spray-absorption, this ammonia-containing gas adopts the method for fresh water (FW) spray, causing ammonia absorbance low, ammonia wastes, production cost is high and the shortcoming that causes environmental pollution.
In Chinese patent database, the patent relating to ammonia-contaminated gas purification has: No. 201010573546 " a kind of method for recycling ammonia gas in industrial waste gas " and No. 200510088566.5 " method processing ammonia-contaminated gas ", these methods are different, are not suitable for ardealite Sulphuric acid ammonium field.Up to now, there is no the technical scheme utilizing ardealite filter acid purification of waste water ammonia-contaminated gas.
Summary of the invention
It is an object of the invention to overcome disadvantages mentioned above to provide a kind of method utilizing ardealite filter acid purification of waste water ardealite sulfur ammonium tail gas, existing MAP is enable to have again the producer of ardealite ammonium sulfate production to be purified by ammonia-containing exhaust and to digest in enterprises, absorption liquid after simultaneously processing is used for producing MAP, reduces comprehensive production cost.
Inventor provides a kind of method utilizing ardealite filter acid purification of waste water ardealite sulfur ammonium tail gas, comprises the following steps:
(1) from phosphoric acid plant stock tank again, ardealite slurry is blotted district be filtered by the feeding area entrance being pumped into ardealite Sulphuric acid ammonium device ardealite rotary vacuum disk filter;
(2) the dry slag of filter cake after filtering is sent to ardealite Sulphuric acid ammonium conversion reaction by belt and is done raw material use.
(3) produce containing P after filtering2O5Acid waste water (filtrate), the upper strata filler spray that partially acidic waste water is got to scrubbing tower by washing acid wastewater feed material pump makes the absorption liquid of ammonia-containing exhaust;Remaining acid waste water sends into phosphoric acid plant stock tank again through spent acidic water pump along waste line.
(4) from carbonation process, conversion procedure, filter progress ammonia-containing exhaust through blower fan send into scrubbing tower hypomere, with acid waste water after scrubbing tower absorbs, forming circulation fluid, set up circulation washing, cleaning mixture arrives spray-absorption on two-layer filler by cleaning circulation pump.
(5) purified qualified tail gas is from scrubbing tower top exhaust chimney qualified discharge.
(6) balance according to turnover material, delivers to MAP Plant a part of cleaning mixture and uses for producing MAP.
The CaSO of ardealite slurry in above-mentioned steps (1)4·2H2O weight/mass percentage composition is 25%.
Acid waste water P after filtering in above-mentioned steps (3)2O5Content is 3.2%, and adding excessive acid waste water to control degree of neutralization is 0.4, it is ensured that filler does not block.
The ammonia content of the ammonia-containing exhaust in above-mentioned steps (4) is 350mg/m3
Inventors have noted that above-mentioned content is weight/mass percentage composition.
The principle of above-mentioned employing pond water washing is: H3PO4+NH3----NH4H2PO4
The invention has the beneficial effects as follows: the technique of the present invention has to turn waste into wealth, both the ammonia-contaminated gas that recyclable ardealite sulfur ammonium ammonium sulfate produces, phosphorus in recyclable ardealite acid waste water again, not only reduces environmental pollution and discharge of wastewater, also reduces the advantages such as production cost.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the present invention;
In figure: 1-ardealite rotary vacuum disk filter;2-ardealite slurry;Acid waste water after 3-filtration;The acid wastewater feed material pump of 4-washing;5-scrubbing tower;6-ammonia-containing exhaust;7-cleaning circulation pump;8-cleaning mixture;The qualified tail gas of 9-;10-spent acidic water pump;11-waste line;12-belt;13-renewing zone;14-discharge zone;15-blots district;16-scrubbing section;17-feeding area.
Detailed description of the invention
Embodiment: certain factory adopts the method for the present invention, utilize ardealite filter acid purification of waste water ardealite sulfur ammonium tail gas, adopt ardealite Sulphuric acid ammonium device, raw material is made by the ardealite slurry 2 of phosphoric acid plant stock tank again, blot district 15 be filtered in the feeding area 17 of ardealite rotary vacuum disk filter 1 entrance, produce 90 tons after filtration containing P2O5Acid waste water 3, the upper strata filler spray that the acid waste waters of 5 tons are got to scrubbing tower by washing acid wastewater feed material pump 4 makes the absorption liquid of ammonia-containing exhaust;Remaining acid waste water is through sending into phosphoric acid plant stock tank again through spent acidic water pump 104 along waste line 11.From carbonation process, conversion procedure, filter progress ammonia-containing exhaust 6 send into the hypomere of scrubbing tower 5 through blower fan, with acid waste water 3 after scrubbing tower 5 absorbs, form circulation fluid, set up circulation washing, cleaning mixture arrives spray-absorption on two-layer filler by circulating pump 7.The dry slag of filter cake after filtration is sent to ardealite sulfur ammonium conversion reaction by belt 12 and is done raw material use.Portion washes liquid 8 is delivered to MAP Plant use for producing MAP, it is ensured that cleaning mixture balances, and purified qualified tail gas 9 is from scrubbing tower top exhaust chimney qualified discharge.

Claims (3)

1. the method utilizing ardealite filter acid purification of waste water ardealite sulfur ammonium tail gas, it is characterised in that comprise the following steps:
(1) from phosphoric acid plant stock tank again, ardealite slurry (2) is blotted district (15) be filtered by the feeding area (17) entrance being pumped into ardealite Sulphuric acid ammonium device ardealite rotary vacuum disk filter (1);
(2) filter cake after filtering is sent to ardealite sulfur ammonium conversion reaction by belt (12) after entering discharge zone (14) discharging and is done raw material use, and after discharging, filter cloth passes through renewing zone (13) regenerated from washing;
(3) filter after containing P2O5Acid waste water (3), the upper strata filler spray that partially acidic waste water is got to scrubbing tower (5) by washing acid wastewater feed material pump (4) makes the absorption liquid of ammonia-containing exhaust, to control degree of neutralization for 0.4, it is ensured that filler does not block;Unnecessary acid waste water sends into phosphoric acid plant stock tank again through spent acidic water pump (10) along waste line (11);Acid waste water P after described filtration2O5Content is 3.2%;
(4) from carbonation process, conversion procedure, filter progress ammonia-containing exhaust (6) through blower fan send into scrubbing tower (5) hypomere, with acid waste water after scrubbing tower (5) absorbs, form circulation fluid, setting up circulation washing, cleaning mixture arrives spray-absorption on two-layer filler by cleaning circulation pump (7);
(5) purified qualified tail gas (9) is from scrubbing tower top exhaust chimney qualified discharge;
(6) balance according to turnover material, delivers to MAP Plant a part of cleaning mixture (8) and uses for producing MAP.
2. the method utilizing ardealite filter acid purification of waste water ardealite sulfur ammonium tail gas as claimed in claim 1, it is characterised in that the CaSO of ardealite slurry in described step (1)4·2H2O weight/mass percentage composition is 25%.
3. the method utilizing ardealite filter acid purification of waste water ardealite sulfur ammonium tail gas as claimed in claim 1, it is characterised in that the ammonia content of the ammonia-containing exhaust in described step (4) is 350mg/m3
CN201410209338.8A 2014-05-19 2014-05-19 A kind of method utilizing ardealite filtered wastewater to purify ardealite sulfur ammonium tail gas Active CN104096466B (en)

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CN110734236A (en) * 2019-12-10 2020-01-31 郑州三迪建筑科技有限公司 Sunlight shed for calcining building gypsum by phosphogypsum

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102631825A (en) * 2012-05-03 2012-08-15 瓮福(集团)有限责任公司 Processing method for tail gas generated in preparation of ammonium sulfate from phosphogypsum
CN103482667A (en) * 2013-09-23 2014-01-01 瓮福(集团)有限责任公司 Quick and efficient purifying method for phosphogypsum

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102631825A (en) * 2012-05-03 2012-08-15 瓮福(集团)有限责任公司 Processing method for tail gas generated in preparation of ammonium sulfate from phosphogypsum
CN103482667A (en) * 2013-09-23 2014-01-01 瓮福(集团)有限责任公司 Quick and efficient purifying method for phosphogypsum

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Address after: 550500 Guizhou Province, Qiannan Buyei and Miao Autonomous Prefecture Fuquan Racecourse town Yingbin Road No. 1 Wengfu group

Patentee after: WENGFU GROUP Co.,Ltd.

Address before: 23, 550002 floor, International Building, No. 57, South City Road, Nanming District, Guiyang, Guizhou

Patentee before: WENGFU GROUP Co.,Ltd.

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