CN103084035B - Clean treatment device of compound fertilizer granulation tail gas - Google Patents
Clean treatment device of compound fertilizer granulation tail gas Download PDFInfo
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- CN103084035B CN103084035B CN201310057824.8A CN201310057824A CN103084035B CN 103084035 B CN103084035 B CN 103084035B CN 201310057824 A CN201310057824 A CN 201310057824A CN 103084035 B CN103084035 B CN 103084035B
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- tail gas
- baffling
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- vacuum
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Abstract
The invention relates to a clean treatment device of compound fertilizer granulation tail gas, belonging to recycling of industrial waste gas carrying materials. The device comprises a dust recovery unit and a water washing treatment unit, wherein the water washing treatment unit comprises a treatment process of vacuum water washing, sealed flow deflection settling, and ammonia gas salification and fixation. The treatment process comprises the following steps: (1) vacuum water absorption; (2) sealed flow deflection settling; (3) ammonia gas salification and fixation; and (4) pressure filtration. The clean treatment device of compound fertilizer granulation tail gas does not need any acidification or neutralization section, and has the advantages of short period for solid-liquid settlement separation and favorable separating effect; in the solid-liquid separation process and use process, little ammonia gas escapes; and the method is beneficial to resource saving and environment protection. The invention is suitable for recycling tail gas generated by a compound fertilizer or complex fertilizer granulation device.
Description
Technical field
The present invention is that a kind of tail gas generated by granulation of compound fertilizer cleans treating apparatus, belongs to the recycling that industrial waste gas carries material.
Background technology
In compound fertilizer is produced, in the technique manufacturing process such as granulation, heated-air drying, cooling, screening, heating, cooling, inevitably produce material dust, the product of the physicochemical change such as volatile component.Discharge system is carried secretly with dry and cooling blast.For a long time, these dust and volatile matter thereof directly enter air with exhaust jet stream, cause the wasting of resources and environmental pollution.
In prior art, after adopting cyclonic separation dedusting, then the method adopting recirculated water to wash, the solid dust that cyclone dust removal separates can be turned back to material process and be used as raw materials for production.But water lotion and entrained Solid fertilizer particles thereof but directly discharge, cause loss and the waste of the fertilizer active principles such as the nitrogen be dissolved in water, phosphorus, potassium.
CN200910229252.0 discloses a kind of tail gas generated by granulation of compound fertilizer recoverying and utilizing method, comprises acidifying, vacuum absorption, the operating procedure such as Separation of Solid and Liquid, neutralization.Portion of washing water is used as raw material workshop batching and uses.But, effective recycling is not obtained for the solid material be not yet dissolved in the water.In addition, acidization adds inorganic acid, brings equipment corrosion, the moisture of recovery and and solid also need to neutralize, add equipment investment, technological operation is loaded down with trivial details.
CN201210106475.X discloses a kind of complete recoverying and utilizing method of tail gas generated by granulation of compound fertilizer, from the tail gas after dust reclaims, enter absorption tower, after circulating vacuum absorbs, the aqueous slurry that tower reactor obtains enters subsider, and solid, liquid is separated, after gained bottom aqueous mud sequentially passes through slush pump, high-order subsider and the process of centrifugal dehydration machine, solid, liquid is separated completely, and filter cake is sent to raw material storehouse, as compound fertilizer proportion material; Filtrate delivers to batch plant as dissolution process water, and the material that tail gas generated by granulation carries is recycled completely.But, also exist following not enough:
1. there is the problem that the Separation of Solid and Liquid cycle is long, solid-liquid separation effect is not good enough in natural subsidence, and in natural subsidence separation process, the ammonia of effusion, enters air, pollutant atmosphere.
2. centrifugal dehydration exists that technique is loaded down with trivial details, labour intensity is large, energy consumption is high, and in dewatering and filtering process, the ammonia of effusion enters air, pollutant atmosphere.
3. the ammonia dissolved in washings is easily overflowed, and still exists and pollutes workshop air environment, the problem of waste resource.
Summary of the invention
The object of the invention is to avoid above-mentioned weak point of the prior art, and provide one need not acidifying, in and workshop section, solid-liquid sedimentation separation cycle short, good separating effect; In solid-liquid separation process process and in using, ammonia is seldom overflowed; The tail gas generated by granulation of compound fertilizer being conducive to Save Resource Protect Environment cleans treating apparatus.
Object of the present invention can be reached by following measure:
Tail gas generated by granulation of compound fertilizer of the present invention cleans treating apparatus, comprise dust recovery unit and and washing processing unit, it is characterized in that described washing processing unit comprises vacuum washing, processing procedure fixed by sealing baffling sedimentation, ammonia salify, concrete treatment step is as follows:
1.. vacuum water absorbs
The liquid level of running water to regulation is added in cyclic absorption tower reactor 1, ON cycle pump A4, circulating water wash liquid pump in cyclic absorption tower reactor 1 is entered the top on absorption tower 2, under the vacuum condition produced at jet pump 8 from the tail gas 14 after the dedusting of dust recovery unit, from bottom to top flow through column plate 3 and recirculated water washing lotion counter current contacting, by carry in fertilizer tail gas parse in minute dusts and technical process with NH
3for the GAS ABSORPTION of main component is in washings:
2.. the sedimentation of sealing baffling
When the dust absorbing in recirculated water washing lotion is to the concentration of process stipulation, enter closed baffling settler 5, under the effect of hydraulic barrier 5 and adverse current baffle plate 6, baffling, adverse current sedimentation, realize solid, liquid and be separated;
3.. ammonia salify is fixed
The clarification washings carrying out self-closed type baffling settler 5 enter ammonia salify fixed reactor 10, control the pH value of washings not higher than 6.8 by good time inorganic acid or the organic acid aqueous solution of adding in ammonia salify fixed reactor 6; When in ammonia salify fixed reactor 10 in the nitrogen content of NH3 0.43% ~ 0.75% time, enter recycle-water storage tank 11, standby workshop of sending into does ingredient water and uses;
4.. press filtration
Mud bottom closed baffling settler 5 enters mud feed bin 12, and after being filtered by filter press system 13, filter cake send raw material workshop to do batch additives and uses; Filtrate enters ammonia salify fixed reactor 6.
The present inventor directly adopts running water vacuum to wash, and avoids the equipment corrosion problem that pickling of the prior art brings, has saved equipment investment.
Adopt and close baffling settler, by repeatedly vertical baffling, change wastewater streams to, reduce the flow velocity of waste water at settling tank, strengthening solid, liquid sedimentation separation operating process.Substantially increase solid-liquid separation efficiency, avoid the effusion of ammonia in natural subsidence process.
Ammonia salify fixing operation process, solving the problem that the ammonia that dissolves in washings is easily overflowed, is technical characteristic the present invention being made to outstanding contributions.
The dust carried in washings is in closed baffling settler after sedimentation, in mud, moisture is less, adopts. and press filtration replaces centrifugal dehydration, also significantly reduces labour intensity, decreases energy consumption, avoid in centrifugal dehydration filter process, the ammonia of effusion is for the pollution of atmospheric environment.
By above measure, more desirably complete task of the present invention.
Object of the present invention can also be reached by following measure:
Tail gas generated by granulation of compound fertilizer of the present invention cleans treating apparatus, step 1. described in the vacuum of vacuum water absorption system between-0.01 ~-0.08MPa.It is preferred technical scheme.
Tail gas generated by granulation of compound fertilizer of the present invention cleans treating apparatus, step 2. described in the number of baffles of closed baffling settler 5 between 3 ~ 10.It is preferred technical scheme.
Tail gas generated by granulation of compound fertilizer of the present invention cleans treating apparatus, step 3. in add inorganic acid or the organic acid aqueous solution be hydrochloric acid, sulfuric acid, nitric acid, phosphonic acids or acetic acid, careless aqueous acid.
Tail gas generated by granulation of compound fertilizer of the present invention cleans treating apparatus, step 3. in add inorganic acid or the organic acid aqueous solution be aqueous hydrochloric acid solution.
Tail gas generated by granulation of compound fertilizer of the present invention cleans treating apparatus, step 3. in the inorganic acid of interpolation or the concentration expressed in percentage by weight of the organic acid aqueous solution control 10% ~ 30%.
Tail gas generated by granulation of compound fertilizer of the present invention cleans treating apparatus, step 3. described in interpolation aqueous hydrochloric acid solution be the aqueous hydrochloric acid solution of organophosphor inorganic agent HEDP process units by-product.This aqueous hydrochloric acid solution, not containing objectionable impurities, is suitable for ammonia salify fixation procedure of the present invention and uses.And reduce production cost.
Tail gas generated by granulation of compound fertilizer of the present invention cleans treating apparatus, step 4. described in filter press adopt plate and frame filter press or vacuum press filter.
Tail gas generated by granulation of compound fertilizer of the present invention cleans the application for the treatment of apparatus, it is characterized in that the recycling being applicable to the tail gas produced in compound fertilizer or complex fertilizer prilling granulator.
Tail gas generated by granulation of compound fertilizer of the present invention cleans treating apparatus following good effect compared to existing technology:
1. provide one need not acidifying, in and workshop section, solid-liquid sedimentation separation cycle short, good separating effect; In solid-liquid separation process process and in using, ammonia is seldom overflowed; The tail gas generated by granulation of compound fertilizer being conducive to Save Resource Protect Environment cleans treating apparatus.
2.. directly adopt running water vacuum washing, avoid the equipment corrosion problem that pickling of the prior art brings, saved equipment investment.
3. adopt and close baffling settler, by repeatedly vertical baffling change wastewater streams to, reduce the flow velocity of waste water at settling tank, strengthening solid, liquid sedimentation separation operating process.Substantially increase solid-liquid separation efficiency, avoid the effusion of ammonia in natural subsidence process.
4. ammonia salify fixing operation process, thoroughly solves the problem that the ammonia that dissolves in washings is easily overflowed.
5. through closing in baffling settler after sedimentation, mud moisture is less, adopts. and press filtration replaces centrifugal dehydration, also significantly reduces labour intensity, decreases energy consumption, avoid in centrifugal dehydration filter process, and the ammonia of effusion is for the pollution of atmospheric environment.
Accompanying drawing explanation
Fig. 1 is that tail gas generated by granulation of compound fertilizer of the present invention cleans treating apparatus process flow diagram
In figure:
1-cyclic absorption tower reactor
2-absorption tower
3-filler
4-circulating pump A
The closed baffling settler of 5-
6-baffle plate
7-adverse current plate washer
8-. jet pump
9-water circulating pump B
10-ammonia salify fixed reactor
11-recycle-water storage tank
12-mud feed bin
13-filter press system
14-is from the tail gas of dust recovery unit
Detailed description of the invention
The present invention will now be further detailed embodiment:
Embodiment 1
A kind of tail gas generated by granulation of compound fertilizer of the present invention cleans treating apparatus
Comprise dust recovery unit and and washing processing unit, it is characterized in that described washing processing unit comprises vacuum washing, processing procedure fixed by sealing baffling sedimentation, ammonia salify, concrete treatment step is as follows:
1.. vacuum water absorbs
The liquid level of running water to regulation is added in cyclic absorption tower reactor 1, ON cycle pump A4, circulating water wash liquid pump in cyclic absorption tower reactor 1 is entered the top on absorption tower 2, under the vacuum condition produced at jet pump 8 from the tail gas 14 after the dedusting of dust recovery unit, from bottom to top flow through column plate 3 and recirculated water washing lotion counter current contacting, by carry in fertilizer tail gas parse in minute dusts and technical process with NH
3for the GAS ABSORPTION of main component is in washings: the vacuum of vacuum water absorption system is between-0.03 ~-0.06MPa.
2.. the sedimentation of sealing baffling
When the dust absorbing in recirculated water washing lotion is to the concentration of process stipulation, enter closed baffling settler 5, under the effect of hydraulic barrier 5 and adverse current baffle plate 6, baffling, adverse current sedimentation, realize solid, liquid and be separated; Number of baffles is between 5 ~ 8.
3.. ammonia salify is fixed
The clarification washings carrying out self-closed type baffling settler 5 enter ammonia salify fixed reactor 10, control the pH value of washings not higher than 6.8 by the in good time aqueous hydrochloric acid solution that adds in ammonia salify fixed reactor 6; When in ammonia salify fixed reactor 10 with NH
3the nitrogen content of meter, 0.43% ~ 0.75% time, enters recycle-water storage tank 11, and standby workshop of sending into does ingredient water use; Add the aqueous hydrochloric acid solution that aqueous hydrochloric acid solution is organophosphor inorganic agent HEDP process units by-product, its concentration expressed in percentage by weight controls 10% ~ 30%.
4.. press filtration
Mud bottom closed baffling settler 5 enters mud feed bin 12, and after being filtered by filter press system 13, filter cake send raw material workshop to do batch additives and uses; Filtrate enters ammonia salify fixed reactor 6.
Claims (2)
1. a tail gas generated by granulation of compound fertilizer cleans treating apparatus, comprise dust recovery unit and washing processing unit, it is characterized in that described washing processing unit comprises vacuum washing, processing procedure fixed by sealing baffling sedimentation, ammonia salify, concrete treatment step is as follows:
1.. vacuum water absorbs
The liquid level of running water to regulation is added in cyclic absorption tower reactor (1), ON cycle pump A (4), circulating water wash liquid pump in cyclic absorption tower reactor (1) is entered the top of absorption tower (2), under the vacuum condition produced at jet pump (8) from the tail gas (14) after the dedusting of dust recovery unit, from bottom to top flow through column plate (3) and recirculated water washing lotion counter current contacting, by carry in fertilizer tail gas parse in minute dusts and technical process with NH
3for the GAS ABSORPTION of main component is in washings:
The vacuum of described vacuum water absorption system is between-0.01 ~-0.08MPa;
2.. the sedimentation of sealing baffling
When the dust absorbing in recirculated water washing lotion is to the concentration of process stipulation, enter closed baffling settler (5), under the effect of hydraulic barrier (5) and adverse current baffle plate (6), baffling, adverse current sedimentation, realize solid, liquid and be separated;
The number of baffles of described closed baffling settler (5) is between 3 ~ 10;
3.. ammonia salify is fixed
The clarification washings carrying out self-closed type baffling settler (5) enter ammonia salify fixed reactor (10), control the pH value of washings not higher than 6.8 by adding aqueous hydrochloric acid solution in ammonia salify fixed reactor (6) in good time; When in ammonia salify fixed reactor (10) with NH
3the nitrogen content of meter, 0.43% ~ 0.75% time, enters recycle-water storage tank (11), and standby workshop of sending into does ingredient water use;
The concentration expressed in percentage by weight of the aqueous hydrochloric acid solution added controls 10% ~ 30%, adds the aqueous hydrochloric acid solution that aqueous hydrochloric acid solution is organophosphor water treatment agent HEDP process units by-product;
4.. press filtration
The mud of closed baffling settler (5) bottom enters mud feed bin (12), and after being filtered by filter press system (13), filter cake send raw material workshop to do batch additives and uses; Filtrate enters ammonia salify fixed reactor (6);
Described filter press adopts plate and frame filter press or vacuum press filter.
2. the tail gas generated by granulation of compound fertilizer of claim 1 cleans the application for the treatment of apparatus, it is characterized in that the recycling being applicable to the tail gas produced in compound fertilizer or complex fertilizer prilling granulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310057824.8A CN103084035B (en) | 2013-02-02 | 2013-02-02 | Clean treatment device of compound fertilizer granulation tail gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310057824.8A CN103084035B (en) | 2013-02-02 | 2013-02-02 | Clean treatment device of compound fertilizer granulation tail gas |
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| CN103084035B true CN103084035B (en) | 2015-04-08 |
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| CN103785197B (en) * | 2014-01-16 | 2016-03-02 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of efficient dense device of slurry and dense method |
| CN107313436A (en) * | 2017-07-03 | 2017-11-03 | 中铁十四局集团有限公司 | Foundation ditch recharge water treatment facilities |
| CN111111384B (en) * | 2019-11-12 | 2021-10-08 | 武汉华利浦防腐工程有限公司 | Hydrochloric acid regeneration exhaust system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000153123A (en) * | 1998-11-18 | 2000-06-06 | Honda Motor Co Ltd | Water treatment apparatus of wet dust collector |
| CN101698132A (en) * | 2009-10-22 | 2010-04-28 | 临沂师范学院 | Method for recycling tail gas generated by granulation of compound fertilizer |
| CN201510783U (en) * | 2009-09-10 | 2010-06-23 | 桐昆集团股份有限公司 | Sludge settling pond |
| CN102671492A (en) * | 2012-04-12 | 2012-09-19 | 吕庆淮 | Method for completely recycling compound fertilizer granulation tail gas |
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2013
- 2013-02-02 CN CN201310057824.8A patent/CN103084035B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000153123A (en) * | 1998-11-18 | 2000-06-06 | Honda Motor Co Ltd | Water treatment apparatus of wet dust collector |
| CN201510783U (en) * | 2009-09-10 | 2010-06-23 | 桐昆集团股份有限公司 | Sludge settling pond |
| CN101698132A (en) * | 2009-10-22 | 2010-04-28 | 临沂师范学院 | Method for recycling tail gas generated by granulation of compound fertilizer |
| CN102671492A (en) * | 2012-04-12 | 2012-09-19 | 吕庆淮 | Method for completely recycling compound fertilizer granulation tail gas |
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