CN103588541A - System and process for one-time neutralization ammonification granulation production of compound fertilizer - Google Patents
System and process for one-time neutralization ammonification granulation production of compound fertilizer Download PDFInfo
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- CN103588541A CN103588541A CN201310538869.7A CN201310538869A CN103588541A CN 103588541 A CN103588541 A CN 103588541A CN 201310538869 A CN201310538869 A CN 201310538869A CN 103588541 A CN103588541 A CN 103588541A
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Abstract
The invention discloses a system for one-time neutralization ammonification granulation production of a compound fertilizer. The system comprises a hydrogen potassium conversion tank, a pre-neutralization storage tank, a reactor, a granulating device, and a tail gas treatment device. The potassium hydrogen conversion tank, the pre-neutralization storage tank and the reactor are connected in turn, the reactor is connected with the granulating device, and the granulating device is connected with the tail gas treatment device. The granulating device comprises an elevator and a granulating machine; the tail gas treatment device comprises a venturi scrubber, a phosphoric acid scrubbing tower, a draught fan and a water washing tower. The reactor is connected with the granulating machine, and the granulating machine is connected with the venturi scrubber. The invention also provides a process utilizing the system for granulation production of the compound fertilizer. The system and the process provided by the invention can reduce tail gas emissions and save the production cost.
Description
Technical field
The present invention relates to a kind of production method of composite fertilizer, especially relate in chemical fertilizers production field once in and the production method of ammoniation-granulation production composite fertilizer.
Background technology
At present, as shown in Figure 1, in the production process of Production of Sbased compound fertilizer by ammoniationgranulatiprocess process, design in ammoniation-granulation and be total in two steps, once and in and post (neutralization reactor), in secondary and at granulation post (cross pipeline reactor), once in and the unprocessed direct discharge of tail gas, in secondary He after tail gas phosphoric acid washing, discharge.But, once in and the exhausted air quantity that produces of tail gas larger, and unprocessed directly emptying, do not meet environmental requirement, and cause ammonia consumption high, thereby cause cost to raise, surrounding environment is also polluted, cause avenging a grievance of periphery resident and relevant department, be unfavorable for the Sustainable development of enterprise.
Summary of the invention
For solving in current production system, waste gas directly discharges, and ammonia consumes problem high but that utilization ratio is lower, and need not increase washing tail gas device, optimizes the system operation, and provides a kind of once neutralization to produce system and the technique of ammoniation-granulation composite fertilizer.
The technical solution adopted in the present invention is:
Once and the system of ammoniation-granulation production composite fertilizer, comprising: hydrogen potassium conversion tank is sulfuric acid and Repone K reaction unit; Pre-neutralization storage tank is to generate nitration mixture device; Reactor is to carry out neutralization of ammonia gasifying device; Prilling granulator and exhaust gas processing device.Hydrogen potassium conversion tank, pre-neutralization storage tank are connected successively with reactor, and reactor is connected with prilling granulator, and prilling granulator is connected with exhaust gas processing device; Wherein prilling granulator comprises lift and tablets press, and described exhaust gas processing device comprises Venturi scrubbing, phosphoric acid washing tower, blower fan and water wash column; And Venturi scrubbing, phosphoric acid washing tower, blower fan are connected successively with water wash column; Described reactor is connected with tablets press, and tablets press is connected with Venturi scrubbing.
Described reactor is cross tube graphiote reactor.
Utilize said system carry out in and the technique of ammoniation-granulation production composite fertilizer, concrete steps are:
1) 98% sulfuric acid and Repone K add the reaction of hydrogen potassium conversion tank to produce sal enixum and hydrogenchloride, and sal enixum overflows in pre-neutralization storagetank.
2) sal enixum, in pre-neutralization storagetank, adds phosphoric acid washing liquid to generate nitration mixture, in being transported to cross pipeline reactor.
3) nitration mixture, in cross pipeline reactor, passes into the gas ammonia of 0.5Mpa, and the sal enixum in nitration mixture and phosphoric acid carry out, after acid-base neutralisation reaction, entering into tablets press in reactor.
4) supplies arrive tablets press by lift and mix and carry out granulation with product in step 3), and the tail gas that tablets press produces is by Venturi scrubbing and two washings of phosphoric acid washing tower, then are discharged by blower fan and water wash column.
Other described supplies are comprised of monoammonium phosphate, urea, vitriolate of tartar, organic matter.
Beneficial effect of the present invention:
1, reduced exhaust emissions, avoided uncontrollable discharge gas, surrounding environment is obviously improved, and has reduced avenging a grievance of social each side.
2, with respect to original production system, cost-saving, remove a set of ammonifying device, can save one of reactor, 30 meters, ammonia pipeline, two, ammonia valve door, also saved safety shower and each supporting safety features, after this transformation, can avoid going up again washing tail gas assembling device simultaneously.
3, remove neutralization reaction and one of them pre-neutralization groove of original system, removed " gas ammonia " pipeline, in having reduced and the existence of post major hazard source, reduced post operation risk, reached post essential safety.
4, after transformation, the ammonia in waste gas carries out absorption cycle recycling, reduce the production and application amount of ammonia, and guarantee that composite fertilizer generates quality, after transformation, composite fertilizer per ton can save gas ammonia 10-15kg, can reduce every year tail gas exhaust-gas ammonia amount approximately 1000 Dun，Wei enterprises and economize on the use of funds more than 300 ten thousand yuan.
Accompanying drawing explanation
Fig. 1 is original production process schema;
Fig. 2 is production technological process of the present invention.
Embodiment
2 the present invention is further illustrated with reference to the accompanying drawings:
Embodiment 1
Once and the system of ammoniation-granulation production composite fertilizer, comprise hydrogen potassium conversion tank 1, pre-neutralization storage tank 2, reactor 3, prilling granulator, exhaust gas processing device.Described hydrogen potassium conversion tank 1, pre-neutralization storage tank 2 and reactor 3 are connected successively, and reactor 3 is connected with prilling granulator, and prilling granulator is connected with exhaust gas processing device.
Wherein prilling granulator comprises lift 4 and tablets press 5, and exhaust gas processing device comprises Venturi scrubbing 6, phosphoric acid washing tower 7, blower fan 8 and water wash column 9, and wherein said Venturi scrubbing 6, phosphoric acid washing tower 7, blower fan 8 and water wash column 9 are connected successively.Described reactor 3 is connected with tablets press 5, and tablets press 5 is connected with Venturi scrubbing 6.
Described reactor 3 is cross tube graphiote reactor.
Utilize said system carry out in and the technique of ammoniation-granulation production composite fertilizer, concrete steps are:
1) 98% sulfuric acid and Repone K add 1 reaction of hydrogen potassium conversion tank to produce sal enixum and hydrogenchloride, and sal enixum overflows in pre-neutralization storagetank 2.
2) sal enixum, in pre-neutralization storagetank 2, adds phosphoric acid washing liquid to generate nitration mixture, in being transported to cross pipeline reactor 3.
3) nitration mixture, in cross pipeline reactor 3, passes into the gas ammonia of 0.5Mpa, and the sal enixum in nitration mixture and phosphoric acid carry out, after acid-base neutralisation reaction, entering into tablets press 5 in reactor.
4) supplies arrive tablets presss 5 by lift 4 and mix and carry out granulation with product in step 3), and the tail gas of tablets press 5 generations is by Venturi scrubbing 6 and 7 two washings of phosphoric acid washing tower, then are discharged by blower fan 8 and water wash column 9.
Other described supplies are comprised of monoammonium phosphate, urea, vitriolate of tartar, organic matter.
Wherein, tablets press completes after granulation, and the next process that accompanying drawing represents is: end product enters baking operation and dries, after sieve, carry out packaging final prod after cooling, coating.
Reaction conditions described in this technique, be to manufacture the reaction conditions of composite fertilizer's routine, and those skilled in the art can be according to system of the present invention and technique, and utilize existing knowledge to complete enforcement of the present invention.
Claims (4)
- Once in and the system of ammoniation-granulation production composite fertilizer, it is characterized in that, it comprises: hydrogen potassium conversion tank is sulfuric acid and Repone K reaction unit; Pre-neutralization storage tank is to generate nitration mixture device; Reactor is to carry out neutralization of ammonia gasifying device; Prilling granulator and exhaust gas processing device; Described hydrogen potassium conversion tank, pre-neutralization storage tank are connected successively with reactor, and reactor is connected with prilling granulator, and prilling granulator is connected with exhaust gas processing device; Wherein prilling granulator comprises lift and tablets press, and described exhaust gas processing device comprises Venturi scrubbing, phosphoric acid washing tower, blower fan and water wash column; And Venturi scrubbing, phosphoric acid washing tower, blower fan are connected successively with water wash column; Described reactor is connected with tablets press, and tablets press is connected with Venturi scrubbing.
- 2. the system as claimed in claim 1, is characterized in that: described reactor is cross tube graphiote reactor.
- 3. utilize described in claim 1 during system is carried out and the technique of ammoniation-granulation production composite fertilizer, it is characterized in that, concrete steps are:1) 98% sulfuric acid and Repone K add the reaction of hydrogen potassium conversion tank to produce sal enixum and hydrogenchloride, and sal enixum overflows in pre-neutralization storagetank;2) sal enixum, in pre-neutralization storagetank, adds phosphoric acid washing liquid to generate nitration mixture, in being transported to cross pipeline reactor.3) nitration mixture, in cross pipeline reactor, passes into the gas ammonia of 0.5Mpa, and the sal enixum in nitration mixture and phosphoric acid carry out, after acid-base neutralisation reaction, entering into tablets press in reactor;4) supplies arrive tablets press by lift and mix and carry out granulation with product in step 3), and the tail gas that tablets press produces is by Venturi scrubbing and two washings of phosphoric acid washing tower, then are discharged by blower fan and water wash column.
- 4. technique as claimed in claim 3, is characterized in that: described supplies are comprised of monoammonium phosphate, urea, vitriolate of tartar, organic matter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310538869.7A CN103588541A (en) | 2013-11-04 | 2013-11-04 | System and process for one-time neutralization ammonification granulation production of compound fertilizer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030757A (en) * | 2014-06-19 | 2014-09-10 | 山东聊城鲁西化工第五化肥有限公司 | Method for producing compound fertilizer containing nitrate nitrogen potassium sulphate |
| CN105315037A (en) * | 2014-08-05 | 2016-02-10 | 中化山东肥业有限公司 | Process for producing high potassium nitro fertilizer by gunite method |
| CN108484246A (en) * | 2018-05-29 | 2018-09-04 | 云南祥丰金麦化工有限公司 | A kind of prilling process producing chemical fertilizer |
| CN112898069A (en) * | 2021-01-20 | 2021-06-04 | 河北冀衡集团有限公司蓝天分公司 | Ammonia-acid method compound fertilizer production system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030757A (en) * | 2014-06-19 | 2014-09-10 | 山东聊城鲁西化工第五化肥有限公司 | Method for producing compound fertilizer containing nitrate nitrogen potassium sulphate |
| CN104030757B (en) * | 2014-06-19 | 2016-02-10 | 山东聊城鲁西化工第五化肥有限公司 | A kind of production method containing nitric nitrogen potassium sulfate compound fertilizer |
| CN105315037A (en) * | 2014-08-05 | 2016-02-10 | 中化山东肥业有限公司 | Process for producing high potassium nitro fertilizer by gunite method |
| CN108484246A (en) * | 2018-05-29 | 2018-09-04 | 云南祥丰金麦化工有限公司 | A kind of prilling process producing chemical fertilizer |
| CN112898069A (en) * | 2021-01-20 | 2021-06-04 | 河北冀衡集团有限公司蓝天分公司 | Ammonia-acid method compound fertilizer production system |
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Application publication date: 20140219 |