CN101376069A - Process and device for recovering solvent-containing tail gas in production of control sustained-release fertilizer with envelope - Google Patents
Process and device for recovering solvent-containing tail gas in production of control sustained-release fertilizer with envelope Download PDFInfo
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- CN101376069A CN101376069A CNA2008101400754A CN200810140075A CN101376069A CN 101376069 A CN101376069 A CN 101376069A CN A2008101400754 A CNA2008101400754 A CN A2008101400754A CN 200810140075 A CN200810140075 A CN 200810140075A CN 101376069 A CN101376069 A CN 101376069A
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Abstract
The invention discloses a recycling method and a device for solvent-contained tail gas in a coated controlled release fertilizers production. The solvents-contained tail gas in the coated controlled release fertilizers production is collected and introduced into a circulating water condenser firstly, and then led to an adsorption tank after blower pressurization and impurity elimination by a filter, so that the solvents are absorbed by active carbon; and when the adsorption tank is desorbed, water vapor is introduced to pass through an active carbon bed to desorb the solvents which are absorbed, and after delamination in a delaminating groove through a cooler, the solvents are led to a recycling groove. The method adopts active carbon to absorb and recycle the solvents-contained tail gas, thereby achieving full recycling of the solvents in the tail gas, standard tail gas emission, and environmental friendliness.
Description
Technical field
The invention belongs to the controlled-release fertilizer production technical field, specifically relate to a kind of active carbon adsorption that adopts and reclaim the method and apparatus that contains solvent tail gas in the film-coated controlled release fertilizer production.
Background technology
Controlled release fertilizer is that according to the crop nutrition content demand, control nutrient releasing speed and burst size make nutrient release profiles and the corresponding to new-type fertilizer of crop demand at the special film of conventional fertilizers outer parcel one deck.The outstanding feature of this fertilizer is to supply with available nutrient synchronously according to the plant growth law curve, thereby the fertilizer nutrient effective rate of utilization is greatly improved, guaranteeing under the prerequisite of plant growth, with compare with concentration fertilizer, the fertilizer efficiency utilization rate can improve more than 50%, and the consumption of traditional fertilizer is significantly reduced.Since this fertilizer have improve chemical fertilizer utilization ratio, reduce use amount and fertilizer application frequency, reduce production costs, reduce environmental pollution, advantage such as raising crop products quality, therefore be called as " 21 century high-tech environment-friendly fertilizer ", become the developing direction of fertilizer industry.
In the production process of coating controlled-release fertilizer, need suitable solute and solvent preparation coating solution.The emptying end gas that is used for dissolving the dissolution kettle of coated fertilizer and storing the flux bath of solvent often contains a large amount of solvents; its content is sometimes up to 5～10%; even through still containing the solvent about 2% in the tail gas behind the water condensation; this part contains solvent tail gas such as direct emptying; not only cause the waste of solvent, also be unfavorable for environmental protection simultaneously.
Summary of the invention
At the deficiencies in the prior art, the purpose of this invention is to provide the recovery method and the device that contain solvent tail gas in a kind of coating controlled-release fertilizer production.
Technical scheme of the present invention is:
The recovery method that contains solvent tail gas in the coating controlled-release fertilizer production, its innovation part is: elder generation is behind recirculated water condenser condenses recovery section solvent after will containing the solvent exhaust collection, and tail gas is delivered to adsorbent equipment after removing impurity with the blower fan pressurization through filter again; In adsorbent equipment, adsorption tanks are totally three parallel operations, and after tail gas entered adsorption tanks, one of them adsorption tanks adsorbed, and two other adsorption tanks carry out desorption and drying, regularly switch, and solvent is by charcoal absorption, tail gas emptying up to standard; During the adsorption tanks desorption, feed water vapour, water vapour passes active carbon bed, and the solvolysis that is adsorbed is adsorbed out, goes the layering of layering groove through cooler, and the bottom solvent removes accumulator tank.
Described solvent is the conventional solvent in controlled-release fertilizer production field, in the methods of the invention, is preferably tetrachloro-ethylene or dimethylbenzene.
The present invention realizes containing in the coating controlled-release fertilizer production device of solvent method for recovering tail gas, the adsorption tanks, cooler, layering groove and the accumulator tank that comprise recirculated water cooling condenser, blower fan, filter, three parallel connections, the tail gas outlet of described recirculated water cooling condenser is connected with the air intake of adsorption tanks by blower fan and filter, the condensate outlet of described recirculated water cooling condenser is communicated with accumulator tank, and the condensate outlet of described adsorption tanks is communicated with accumulator tank through cooler and layering groove.
The technological requirement and the characteristics that the present invention is directed to coating controlled-release fertilizer production are carried out the recovery of solvent, its technical advantage is: three adsorption tanks parallel operations, and adopt charcoal absorption to reclaim and contain solvent tail gas, can reclaim the solvent in the tail gas up hill and dale, make exhaust emissions up to standard, satisfy environmental requirement.
Description of drawings
Fig. 1 is the retracting device structural representation that contains solvent tail gas in the coating controlled-release fertilizer production.Wherein, 1. recirculated water cooling condenser, 2. blower fan, 3. filter, 4. adsorption tanks, 5. cooler, 6. layering groove, 7. accumulator tank.
The specific embodiment
Describe the technical scheme that the present invention proposes in detail below in conjunction with drawings and Examples, but be not limited thereto.
Embodiment 1
As shown in Figure 1, the retracting device that contains solvent tail gas in the coating controlled-release fertilizer production, adsorption tanks 4, cooler 5, layering groove 6 and accumulator tank 7 by recirculated water cooling condenser 1, blower fan 2, filter 3, three parallel connections constitute, the tail gas outlet of described recirculated water cooling condenser 1 is connected with the air intake of adsorption tanks 4 by blower fan 2 and filter 3, the condensate outlet of described recirculated water cooling condenser 1 is communicated with accumulator tank 7, and the condensate outlet of described adsorption tanks 4 is communicated with accumulator tank 7 through cooler 5 and layering groove 6.
Embodiment 2
Utilize embodiment 1 described device, carry out the recovery of solvent tail gas in the coating controlled-release fertilizer production, the concrete operations step is:
A, will be behind the solvent exhaust collection in the coating controlled-release fertilizer production be chilled to below 40 ℃ through recirculated water cooling condenser 1 earlier, recovery section solvent, tail gas pass through with blower fan 2 pressurizations and deliver to adsorption tanks 4 after filters 3 are removed solid impurity;
B, in adsorption tanks 4, solvent is wherein got off by charcoal absorption, purified gas directly discharges.Adsorption tanks 4 are totally three parallel operations, and one of them adsorption tanks adsorbs, and two adsorption tanks carry out desorption and drying in addition, regularly switch;
When C, adsorption tanks 4 desorption, feed water vapour, water vapour passes active carbon bed, and the solvolysis that is adsorbed is adsorbed out, goes 6 layerings of layering groove through solvent cooler 5, the solvent of the bottom accumulator tank 7 that desolvates.
Embodiment 3:2000m
3The tail gas recycle of/h tetrachloro-ethylene.
A, with 2000m
3At first be chilled to below 40 ℃ after containing the tetrachloro-ethylene exhaust collection in the production of/h coating controlled-release fertilizer through recirculated water cooling condenser 1, the part tetrachloro-ethylene that recovery is condensed, tail gas are delivered to the adsorption tanks 4 that 6 tons of activated carbon are housed altogether with 2 pressurizations of B9-19-4.5A blower fan again after 100 purpose filters 3 are removed solid impurity;
B, in adsorption tanks 4, the tetrachloro-ethylene in the tail gas is got off by charcoal absorption, purified gas directly discharges.Adsorption tanks 4 are totally three parallel operations, and one of them adsorption tanks adsorbs, and two adsorption tanks carry out desorption and drying in addition, regularly switch;
When C, adsorption tanks 4 desorption, feed water vapour, water vapour passes active carbon bed, and the solvolysis that is adsorbed is adsorbed out, goes 6 layerings of layering groove through solvent cooler 5, and the tetrachloro-ethylene of bottom removes accumulator tank 7.
Embodiment 4:1000m
3The tail gas recycle of/h dimethylbenzene.
A, with 1000m
3At first be chilled to below 40 ℃ behind the exhaust collection that contains dimethylbenzene in the production of/h film-coated controlled release fertilizer through recirculated water cooling condenser 1, the part dimethylbenzene that recovery is condensed, tail gas are delivered to the adsorption tanks 4 that 3 tons of activated carbon are housed altogether with 2 pressurizations of B9-19-4.5A blower fan again after 100 purpose filters 3 are removed solid impurity;
B, in adsorption tanks 4, the dimethylbenzene in the tail gas is got off by charcoal absorption, purified gas directly discharges.Adsorption tanks 4 are totally three parallel operations, and one of them adsorption tanks adsorbs, and two adsorption tanks carry out desorption and drying in addition, regularly switch;
When C, adsorption tanks 4 desorption, feed water vapour and carry out desorption, steam passes active carbon bed, and the solvolysis that is adsorbed is adsorbed out, goes 6 layerings of layering groove through solvent cooler 5, and the dimethylbenzene of bottom removes accumulator tank 7.
Should be pointed out that the specific embodiment is the more representational example of the present invention, obvious technical scheme of the present invention is not limited to the foregoing description, and a lot of distortion can also be arranged.Those of ordinary skill in the art, with the present invention clear and definite disclosed or according to undoubted the obtaining of the written description of file, all should think the claimed scope of this patent.
Claims (3)
1, the recovery method that contains solvent tail gas in a kind of coating controlled-release fertilizer production, it is characterized in that: elder generation is behind recirculated water cooling condenser (1) condensation recovery section solvent after will containing the solvent exhaust collection, and tail gas is delivered to adsorbent equipment after using blower fan (2) pressurization to remove impurity through filter (3) again; In adsorbent equipment, adsorption tanks (4) are totally three parallel operations, and after tail gas entered adsorption tanks (4), one of them adsorption tanks adsorbed, and two other adsorption tanks carry out desorption and drying, regularly switch, and solvent is by charcoal absorption, tail gas emptying up to standard; During the adsorption tanks desorption, feed water vapour, water vapour passes active carbon bed, and the solvolysis that is adsorbed is adsorbed out, goes layering groove (6) layering through cooler (5), and the bottom solvent removes accumulator tank (7).
2, the solvent method for recovering tail gas that contains according to claim 1 is characterized in that, described solvent is tetrachloro-ethylene or dimethylbenzene.
3, a kind of device of realizing claim 1 or 2 described methods, it is characterized in that, comprise recirculated water cooling condenser (1), blower fan (2), filter (3), adsorption tanks (4), cooler (5), layering groove (6) and accumulator tank (7), the tail gas outlet of described recirculated water cooling condenser (1) is connected with the air intake of adsorption tanks (4) by blower fan (2) and filter (3), the condensate outlet of described recirculated water cooling condenser (1) is communicated with accumulator tank (7), and the condensate outlet of described adsorption tanks (4) is communicated with accumulator tank (7) through cooler (5) and layering groove (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008101400754A CN100544802C (en) | 2008-09-24 | 2008-09-24 | The recovery method and the device that contain solvent tail gas in the coating controlled-release fertilizer production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008101400754A CN100544802C (en) | 2008-09-24 | 2008-09-24 | The recovery method and the device that contain solvent tail gas in the coating controlled-release fertilizer production |
Publications (2)
| Publication Number | Publication Date |
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| CN101376069A true CN101376069A (en) | 2009-03-04 |
| CN100544802C CN100544802C (en) | 2009-09-30 |
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| CNB2008101400754A Active CN100544802C (en) | 2008-09-24 | 2008-09-24 | The recovery method and the device that contain solvent tail gas in the coating controlled-release fertilizer production |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649499A (en) * | 2012-05-14 | 2012-08-29 | 高鼎精细化工(昆山)有限公司 | Solvent storage tank |
| CN102698558A (en) * | 2012-04-09 | 2012-10-03 | 常州明成翔锐环保科技有限公司 | Device and method for adsorbing, recycling and treating organic waste gases efficiently |
| CN103223287A (en) * | 2013-04-27 | 2013-07-31 | 山东新华制药股份有限公司 | Purifying and recovering device of exhaust gas comprising toluene, and exhaust gas purifying and recovering method |
| CN105110951A (en) * | 2015-09-06 | 2015-12-02 | 叶青军 | Production method and equipment of controlled-release fertilizer |
-
2008
- 2008-09-24 CN CNB2008101400754A patent/CN100544802C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698558A (en) * | 2012-04-09 | 2012-10-03 | 常州明成翔锐环保科技有限公司 | Device and method for adsorbing, recycling and treating organic waste gases efficiently |
| CN102649499A (en) * | 2012-05-14 | 2012-08-29 | 高鼎精细化工(昆山)有限公司 | Solvent storage tank |
| CN103223287A (en) * | 2013-04-27 | 2013-07-31 | 山东新华制药股份有限公司 | Purifying and recovering device of exhaust gas comprising toluene, and exhaust gas purifying and recovering method |
| CN103223287B (en) * | 2013-04-27 | 2015-05-06 | 山东新华制药股份有限公司 | Purifying and recovering device of exhaust gas comprising toluene, and exhaust gas purifying and recovering method |
| CN105110951A (en) * | 2015-09-06 | 2015-12-02 | 叶青军 | Production method and equipment of controlled-release fertilizer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100544802C (en) | 2009-09-30 |
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Owner name: KINGENTA ECOLOGICAL ENGINEERING GROUP CO., LTD. Free format text: FORMER NAME: SHANDONG KINGENTA BIO-ENGINEERING STOCK CO., LTD. |
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Address after: 276700 Linyi Province, Linshu County, Xing County, West Street, No. 19 Patentee after: KINGENTA ECOLOGICAL ENGINEERING GROUP CO., LTD. Address before: 276700 No. 19, Da Xing Dong Street, Linshu County, Shandong Province Patentee before: Shandong Kingenta Bio-engineering Stock Co., Ltd. |