CN103497009A - New method for continuously preparing dilute sulfuric acid in ammonia acid compound fertilizer production - Google Patents
New method for continuously preparing dilute sulfuric acid in ammonia acid compound fertilizer production Download PDFInfo
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- CN103497009A CN103497009A CN201310381008.2A CN201310381008A CN103497009A CN 103497009 A CN103497009 A CN 103497009A CN 201310381008 A CN201310381008 A CN 201310381008A CN 103497009 A CN103497009 A CN 103497009A
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Abstract
The invention discloses a new method for preparing dilute sulfuric acid in ammonia acid compound fertilizer production, and the method comprises the following steps: continuous preparation of the dilute sulfuric acid, two stage water washing spray for removing acid mist, and emissions through a chimney. According to the method, a stone-type graphite heat exchanger is used for continuous preparation of the dilute sulfuric acid, the speed of preparation of the dilute sulfuric acid can be effectively improved, and only one graphite heat exchanger is needed; because a DCS (distributed control system) is used for online flow and ratio controlling of concentrated sulfuric acid and process water, the manpower cost is effectively reduced, intrinsic safety of equipment can be improved, and the method is suitable for matching ammonia acid compound fertilizer production equipment with a scale of 100000 tons/year and above; finally, through the two stage water washing, acid mist emissions can be effectively reduced, and the environment is purified (the final discharged tail gas contains 10-15 mg/m<3> of sulfuric acid). The washing water can be used as the process water to get into an acid preparing system.
Description
Technical field
The present invention relates generally to a kind of method, relates in particular to a gynaminic acid composite fertilizer and produces continuous dilute sulphuric acid preparation novel method.
Background technology
The general enamel reaction still intermittent type that adopts of dilute sulphuric acid preparation that has the production of propylhomoserin composite fertilizer now is prepared, and a small amount of acid mist uncontrollable discharge of generation, affect environment.Its action principle: utilize the vitriol oil and water miscible principle arbitrarily, first a certain amount of process water is put into to enamel reaction still, then open and stir, then in enamel reaction still, slowly add the vitriol oil; The reaction heat of dilution is taken away by chuck recirculated water.Its shortcoming is as follows: artificial preparation, and inefficiency, personnel are easily burnt, and required enamel reaction still quantity is many; Rule of thumb preparation, the concentration of dilute sulphuric acid has fluctuation; The acid mist uncontrollable discharge, affect environment.
Summary of the invention
The object of the invention just is to provide a kind of propylhomoserin composite fertilizer and produces dilute sulphuric acid preparation novel method.
The present invention is achieved by the following technical solutions:
1, a gynaminic acid composite fertilizer produces continuous dilute sulphuric acid preparation novel method, it is characterized in that comprising the following steps:
(1) dilute sulphuric acid preparation continuously: adopt the stone formula graphite heat exchanger of modified resin impregnated graphite, the vitriol oil enters and mixes continuously from its top in proportion with process water, from lower part outlet, enters the dilute sulphuric acid dashpot; Recirculated water enters the graphite heat exchanger shell side to sail against the current from its side lower part and carries out indirect heat exchange with diluted acid, and the band sulfuric acid heat of dilution, flow out from the upper side outlet, goes circulating water system;
(2) secondary washing spray acid-mist-removing;
(3) by smoke stack emission;
(4) washing water can be used as process water and enter acid preparing system.
2, a gynaminic acid composite fertilizer according to claim 1 produces continuous dilute sulphuric acid preparation novel method, it is characterized in that, described modified resin refers to add in proportion epoxy resin in resol, to improve its erosion resistance, cohesiveness; Wherein the weight ratio of resol and epoxy resin is 60-70:30-40.
3, a gynaminic acid composite fertilizer according to claim 1 produces continuous dilute sulphuric acid preparation novel method, it is characterized in that the top mixing section of described stone formula graphite heat exchanger and being controlled at not higher than 110 ℃ to the heat exchange of top part temperature.
4, a gynaminic acid composite fertilizer according to claim 1 produces continuous dilute sulphuric acid preparation novel method, it is characterized in that, described circulating water system adopts enhancing mixed chamber cooling structure, and water coolant is forced refrigeration cycle, and circulating-pump outlet pressure is 0.3-0.4MPa.
5, a gynaminic acid composite fertilizer according to claim 1 produces continuous dilute sulphuric acid preparation novel method, it is characterized in that, described secondary washing spray is spray washing in Venturi scrubbing and filler tail gas washing tower; The inlet gas flow velocity of one-level Venturi scrubbing is 15-20m/s, and liquid-gas ratio is 0.6-0.8L/m
3; The spray water mist wide-angle 100-120 degree of secondary tail gas washing tower washing, purification efficiency is 94-96%.
Advantage of the present invention is:
Adopt the continuous complex acid of stone formula graphite heat exchanger in method of the present invention, effectively improve complex acid speed, can only need a socle China ink interchanger; Because can adopt the DCS system to carry out online flowrate proportioning control to the vitriol oil and process water, effectively reduce human cost, improve the device essential safety, the propylhomoserin production device for compound fertilizer of applicable 100,000 ton/years and above scale is supporting; Finally use the two-stage washing, effectively reduce acid mist emission, (final emission sulfur acid amount is 10-15mg/m to have purified environment
3).Washing water can be used as process water and enter acid preparing system.
Embodiment
Embodiment 1
One gynaminic acid composite fertilizer produces continuous dilute sulphuric acid preparation novel method, comprises the following steps:
(1) dilute sulphuric acid preparation continuously: adopt the stone formula graphite heat exchanger of modified resin impregnated graphite, the vitriol oil enters and mixes continuously from its top in proportion with process water, from lower part outlet, enters the dilute sulphuric acid dashpot; Recirculated water enters the graphite heat exchanger shell side to sail against the current from its side lower part and carries out indirect heat exchange with diluted acid, and the band sulfuric acid heat of dilution, flow out from the upper side outlet, goes circulating water system;
(2) secondary washing spray acid-mist-removing;
(3) by smoke stack emission;
(4) washing water can be used as process water and enter acid preparing system.
Described modified resin refers to add in proportion epoxy resin in resol, to improve its erosion resistance, cohesiveness; Wherein the weight ratio of resol and epoxy resin is 60:40.
The top mixing section of described stone formula graphite heat exchanger and being controlled at not higher than 110 ℃ to the heat exchange of top part temperature.
Described circulating water system adopts enhancing mixed chamber cooling structure, and water coolant is forced refrigeration cycle, and circulating-pump outlet pressure is 0.4MPa.
Described secondary washing spray is spray washing in Venturi scrubbing and filler tail gas washing tower; The inlet gas flow velocity of one-level Venturi scrubbing is 20m/s, and liquid-gas ratio is 0.7L/m
3; Spray water mist wide-angle 120 degree of secondary tail gas washing tower washing, purification efficiency is 95%.
Claims (5)
1. a gynaminic acid composite fertilizer produces continuous dilute sulphuric acid preparation novel method, it is characterized in that comprising the following steps:
(1) dilute sulphuric acid preparation continuously: adopt the stone formula graphite heat exchanger of modified resin impregnated graphite, the vitriol oil enters and mixes continuously from its top in proportion with process water, from lower part outlet, enters the dilute sulphuric acid dashpot; Recirculated water enters the graphite heat exchanger shell side to sail against the current from its side lower part and carries out indirect heat exchange with diluted acid, and the band sulfuric acid heat of dilution, flow out from the upper side outlet, goes circulating water system;
(2) secondary washing spray acid-mist-removing;
(3) by smoke stack emission;
(4) washing water can be used as process water and enter acid preparing system.
2. a gynaminic acid composite fertilizer according to claim 1 produces continuous dilute sulphuric acid preparation novel method, it is characterized in that, described modified resin refers to add in proportion epoxy resin in resol, to improve its erosion resistance, cohesiveness; Wherein the weight ratio of resol and epoxy resin is 60-70:30-40.
3. a gynaminic acid composite fertilizer according to claim 1 produces continuous dilute sulphuric acid preparation novel method, it is characterized in that the top mixing section of described stone formula graphite heat exchanger and being controlled at not higher than 110 ℃ to the heat exchange of top part temperature.
4. a gynaminic acid composite fertilizer according to claim 1 produces continuous dilute sulphuric acid preparation novel method, it is characterized in that, described circulating water system adopts enhancing mixed chamber cooling structure, and water coolant is forced refrigeration cycle, and circulating-pump outlet pressure is 0.3-0.4MPa.
5. a gynaminic acid composite fertilizer according to claim 1 produces continuous dilute sulphuric acid preparation novel method, it is characterized in that, described secondary washing spray is spray washing in Venturi scrubbing and filler tail gas washing tower; The inlet gas flow velocity of one-level Venturi scrubbing is 15-20m/s, and liquid-gas ratio is 0.6-0.8L/m
3; The spray water mist wide-angle 100-120 degree of secondary tail gas washing tower washing, purification efficiency is 94-96%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310381008.2A CN103497009A (en) | 2013-08-28 | 2013-08-28 | New method for continuously preparing dilute sulfuric acid in ammonia acid compound fertilizer production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310381008.2A CN103497009A (en) | 2013-08-28 | 2013-08-28 | New method for continuously preparing dilute sulfuric acid in ammonia acid compound fertilizer production |
Publications (1)
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|---|---|
| CN103497009A true CN103497009A (en) | 2014-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310381008.2A Pending CN103497009A (en) | 2013-08-28 | 2013-08-28 | New method for continuously preparing dilute sulfuric acid in ammonia acid compound fertilizer production |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1363513A (en) * | 2001-12-14 | 2002-08-14 | 中国五环化学工程公司 | Process for preparing wet phosphoric acid by dihydrate method |
| CN1471997A (en) * | 2003-06-17 | 2004-02-04 | 东华工程科技股份有限公司 | Washing method and apparatus for phosphoric acid reacting trough extracting tail gas |
| CN102258929A (en) * | 2011-05-19 | 2011-11-30 | 武汉市中东化工有限公司 | Method for recycling phosphoric acid-produced exhaust |
| CN102267826A (en) * | 2010-06-01 | 2011-12-07 | 吴绍山 | Composite fertilizer production method utilizing amino acid |
| CN202869359U (en) * | 2012-06-26 | 2013-04-10 | 青岛瀚新石墨设备科技有限公司 | Graphite pressed pipe |
-
2013
- 2013-08-28 CN CN201310381008.2A patent/CN103497009A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1363513A (en) * | 2001-12-14 | 2002-08-14 | 中国五环化学工程公司 | Process for preparing wet phosphoric acid by dihydrate method |
| CN1471997A (en) * | 2003-06-17 | 2004-02-04 | 东华工程科技股份有限公司 | Washing method and apparatus for phosphoric acid reacting trough extracting tail gas |
| CN102267826A (en) * | 2010-06-01 | 2011-12-07 | 吴绍山 | Composite fertilizer production method utilizing amino acid |
| CN102258929A (en) * | 2011-05-19 | 2011-11-30 | 武汉市中东化工有限公司 | Method for recycling phosphoric acid-produced exhaust |
| CN202869359U (en) * | 2012-06-26 | 2013-04-10 | 青岛瀚新石墨设备科技有限公司 | Graphite pressed pipe |
Non-Patent Citations (1)
| Title |
|---|
| 韦豪: "石墨冷却器替代搪玻璃反应釜配制稀硫酸", 《磷肥与复肥》 * |
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Effective date of registration: 20150714 Address after: 231602 north side of No. five road, circular economy demonstration park, Anhui, Hefei Applicant after: CNSG ANHUI HONG SIFANG FERTILIZER INDUSTRY CO., LTD. Address before: 230022 Qimen Road, Shushan District, Anhui, No. 12, No. Applicant before: CNSG Anhui Hong Sifang Co., Ltd. |
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Application publication date: 20140108 |