CN102875218A - Tube type reactor for preparing ammonia-acid method compound fertilizer - Google Patents
Tube type reactor for preparing ammonia-acid method compound fertilizer Download PDFInfo
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- CN102875218A CN102875218A CN2012104351309A CN201210435130A CN102875218A CN 102875218 A CN102875218 A CN 102875218A CN 2012104351309 A CN2012104351309 A CN 2012104351309A CN 201210435130 A CN201210435130 A CN 201210435130A CN 102875218 A CN102875218 A CN 102875218A
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Abstract
The invention discloses a tube type reactor for preparing an ammonia-acid method compound fertilizer. The reactor comprises a three-way tube, a plurality of reaction tubes, an elbow and a nozzle which are horizontally connected in sequence, wherein the upper opening of the three-way tube is the acid inlet; an ammonia inlet tube is inserted in another horizontal inlet of the three-way tube; not less than 20mm of the ammonia inlet tube is inserted into the acid inlet; a steam inlet which is used for preheating before the tube type reactor is used and for blowing after the tube type reactor is used is arranged on the ammonia inlet tube; the three-way tube, a reaction tube, the elbow and the nozzle are of composite tubes into which silicon carbide tubes are internally arranged, tetrafluoro materials for fixing the silicon carbide tubes are lined at the middle part and steel tubes are sleeved outside; and the ammonia inlet tube is of a stainless steel lining tetrafluoro material tube. The tube type reactor can resist temperature more than 400 DEG C because of the characteristics of the silicon carbide such as corrosion resistance, thermostability, large strength, shock resistance and the like, therefore, the temperature of materials can be increased by sufficiently using the reaction heat of the ammonia and the acid during the granulation process, a sulfuric acid solution generated in ammonia-acid reaction is of liquid phase quantity and is adhesive; and the balling rate is high.
Description
Technical field
The present invention relates to a kind of tubular reactor, be specifically related to a kind of tubular reactor for the preparation of propylhomoserin method composite fertilizer.
Background technology
At present, propylhomoserin method compound manure production technique is risen gradually, has represented compound manure production most up-to-date techniques.The method of existing propylhomoserin method production Nitrogen, Phosphorus and Potassium may further comprise the steps: raw material such as Repone K, monoammonium phosphate, ammonium chloride, urea etc. are entered rotary drum granulator behind computer metering; simultaneously ammonia, acid are directly led to the bed of material the inside of tablets press by pipe laying; and steam evenly is sprayed on the material in the rotary drum granulator; carry out granulation; then enter successively drying system; oven dry enters screening by cooling system; thoroughly do not return rotary drum granulator behind the crushing material of sieve; screen sections enters packing machine thoroughly; add the anti-caking agent, after feed bin stores, pack.
Tablets press bed of material the inside is directly led in ammonia, acid in the above-mentioned composite fertilizer production process; cause is not the propylhomoserin direct reaction; react very weak; temperature of reaction is low; the load that is unfavorable for improving granulating rate and reduces follow-up drying process; therefore the advantage of propylhomoserin method production technique can not be not fully exerted; and when producing high nitrogen product; because containing a large amount of urea in the raw material; sulfuric acid directly leads in the bed of material can generate ureasulfuric acid with urea reaction; because the viscosity of ureasulfuric acid is very large, granulation process is wayward, and the problem that material becomes the mud shape that production can not normally be carried out often occurs.Domestic a lot of producer attempted the employing tubular reactor and finished the propylhomoserin reaction, utilize ammoniumsulphate soln to carry out granulation, increase substantially prilling temperature, reduce the generation of thiocarbamide when producing high nitrogen product, but because sulfuric acid and ammonia direct reaction temperature reach more than 400 ℃, existing with tetrafluoro, graphite is the tubular reactor of main raw, heatproof is no more than 200 ℃, be used for ammonia, the life-span is no more than 7 days during acid-respons, some alloy materials such as titanium alloy, the tubular reactor that Hastelloy is made faces the problems referred to above equally, other adopts the material of glass-lined steel because glass can not resist suddenly cold and hot, cause northern area during winter tubular reactor can not normally use.Based on above reason, adopt the enterprise of tubular reactor produced Nitrogen, Phosphorus and Potassium to need first the vitriol oil to be diluted with water to dilute sulphuric acid, and then and ammonia react, temperature of reaction is controlled at below 200 ℃, lost a large amount of reaction heat in this process.
Summary of the invention
Problem to be solved by this invention is; a kind of tubular reactor for the preparation of propylhomoserin method composite fertilizer is provided; utilize ammonia, the acid high-temperature sulfuric acid ammonium solution that direct reaction generates in tubular reactor to carry out granulation; take full advantage of ammonia, acid-respons heat raising temperature of charge in the granulation process; the sulfate of ammoniac solution that utilizes the propylhomoserin reaction to generate is amount of liquid phase and viscosity; balling ratio is high; tablets press outlet material temperature can reach more than 90 ℃; material moisture is less than 2.5%, and product particle is smooth, mellow and full and the crystal sense arranged.Produce high nitrogen product (ammonia content 〉=more than 20%), also can not cause production normally to carry out because of producing a large amount of ureasulfuric acids.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of tubular reactor for the preparation of propylhomoserin method composite fertilizer, comprise the Y-tube that level links to each other successively, a plurality of reaction tubess, elbow and nozzle, Y-tube is suitable for reading to be acid inlet, be inserted with ammonia-feeding pipe in another level mouth of Y-tube, ammonia-feeding pipe was inserted into acid inlet and was not less than 20mm, be provided with the steam-in of using front preheating and using post-purge as tubular reactor on the ammonia-feeding pipe, described Y-tube, reaction tubes, elbow and nozzle are built-in silicon carbide (SiC) pipe, the centre is lined with the fixedly PTFE of carborudum tube, the multiple-unit tube of outer steel pipe, described ammonia-feeding pipe are stainless steel lined PTFE pipe.
Described Y-tube, a plurality of reaction tubes, elbow are connected with nozzle and are adopted flange to connect, the cushion that pad adopts PTFE to make.
Described Y-tube is straight tee, and elbow is 90 degree elbows.
Described Y-tube, reaction tubes, elbow length are 500mm.
Described reaction tubes is 2.
The invention has the beneficial effects as follows:
1, service life of equipment is long, performance is better
Have corrosion-resistant, high temperature resistant, the characteristics such as intensity large, shock resistance, high temperature resistant can reaching more than 400 ℃.The silicon carbide of one of three kinds of materials (SiC) pipe, corrosion-resistant, high temperature resistant, the characteristics such as intensity is large, wear-resistant, shock resistance of utilizing that it has are as the main raw of tubular reactor.And it can also resist thermal shock, is heated in air more than 1000 ℃, and sharply more sharply heating of cooling can be not cracked yet.Be to solve carborudum tube and be afraid of the problem of colliding with, tubular reactor adopts built-in carborudum tube, the outer steel pipe protection, and middle lining PTFE is for filling and fixing carborudum tube.And be provided with the steam-in at ammonia-feeding pipe, before using as tubular reactor preheating and use after blow device, prevent Yin Wendu suddenly increase damage the tubular reactor parts and when stopping slip stop up tubular reactor.The mode that adopts elbow to add nozzle can make the bed of material of tubular reactor in the tablets press more close to, reduce the loss of heat midway.Each parts all adopts flange to add the connection of tetrafluoro cushion, and is easy to maintenance.
2, abundant sharp propylhomoserin direct reaction heat is carried out granulation, and energy-saving effect is remarkable
The ammoniumsulphate soln more than 400 ℃ that takes full advantage of ammonia, the generation of sour direct reaction in the granulation process carries out granulation; utilize sulfate of ammoniac solution to be amount of liquid phase and viscosity; utilize its reaction heat to add thermal material; balling ratio is high, can reach more than 80%, and tablets press outlet material temperature can reach more than 90 ℃; material moisture is less than 2.5%; two sections oven dry are changed into one section oven dry just can satisfy need of production, high nitrogen product can be realized without drying-granulating, greatly reduce system energy consumption.
3, improved quality product
Product particle is smooth, mellow and full and have crystal sense, granule strength can reach more than the 25N, and granulation process is stable, and the fluctuation of product nutrient is little.
4, solved and produced high nitrogen product because the problem that the production that causes of ureasulfuric acid can't normally be carried out
Adopt tubular reactor to replace the production method of sulfuric acid, ammonia pipe laying, because sulfuric acid and ammonia react first the generation ammoniumsulphate soln, existence without free sulfuric acid, avoided with raw material in urea reaction generate ureasulfuric acid, granulation process is controlled easily, can not occur because of ureasulfuric acid too much, make material become the mud shape, the problem that causes production normally not carry out.
5, avoided high nitrogen product to use because the biuret height causes product to burn the problem of seedling
Take full advantage of ammonia in the granulation process, acid-respons heat adds thermal material; tablets press outlet material temperature can reach more than 90 ℃; material moisture is less than 2.5%; can reduce drying time and bake out temperature like this; change two sections oven dry into one section oven dry and just can satisfy need of production; reduce the generation of biuret, solved and used high nitrogen product because the biuret height causes product to burn the problem of seedling.
6, the reaction tubes performance is better, reaction is more thorough
Ammonia-feeding pipe is crossed acid inlet and is not less than 20mm, guaranteed that ammonia and acid do not enter in the square tube, and gas ammonia pressure is large, and spray is thanked at a high speed in reaction tubes, makes to form vacuum in the reaction tubes, sucks sulfuric acid, adopts two joint reaction tubess, guarantees that reaction is more abundant, thorough.
Description of drawings
Fig. 1 is that the present invention is for the preparation of the structural representation of the tubular reactor of propylhomoserin method composite fertilizer
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
As shown in Figure 1, tubular reactor for the preparation of propylhomoserin method composite fertilizer of the present invention, comprise the Y-tube 1 that level links to each other successively, a plurality of reaction tubess 2, elbow 4 and nozzle 5, Y-tube 1 is suitable for reading to be acid inlet 8, be inserted with ammonia-feeding pipe 6 in another level mouth of Y-tube 1, ammonia-feeding pipe 6 was inserted into acid inlet and was not less than 20mm, ammonia-feeding pipe 6 is provided with the steam-in 7 of using front preheating and using post-purge as tubular reactor, described Y-tube 1, reaction tubes 2, elbow 4 and nozzle 5 are built-in silicon carbide SiC pipe 11, the centre is lined with the fixedly PTFE 10 of carborudum tube, the multiple-unit tube of outer steel pipe 9, described ammonia-feeding pipe 6 is stainless steel lined PTFE pipe.
In the middle of being connected with nozzle, described Y-tube 1, a plurality of reaction tubes 2, elbow 4 adopt flange to connect the cushion that pad adopts PTFE to make.
Described Y-tube 1 is straight tee 1, and elbow 4 is 90 degree elbows.
Described Y-tube 1, reaction tubes 2, elbow 4 length are 500mm.
Described reaction tubes 2 is 2.
Straight tee 1 of the present invention, reaction tubes 2,90 degree elbows 4, nozzle 5; above-mentioned parts all adopt three kinds of materials to make; built-in silicon carbide SiC pipe 11; outer steel pipe 9 protections; middle lining PTFE 10 for ease of maintaining, adopts flange to connect for filling and fixing carborudum tube; the centre installs the cushion that PTFE is made additional, guarantees not damage built-in carborudum tube in the connection procedure.The tubular reactor of making of above-mentioned three kinds of materials utilizes silicon carbide to have corrosion-resistant, high temperature resistant, the characteristics such as intensity large, shock resistance, and the heatproof degree can reach more than 400 ℃, and good anti-suddenly cold and hot performance is arranged.Straight tee 1 top is acid inlet 8, ammonia-feeding pipe 6 adopts 316L stainless steel lined PTFE to make, ammonia-feeding pipe 6 is crossed acid inlet and is not less than 20mm, be provided with steam-in 7 at ammonia-feeding pipe 6, use front preheating and use the post-purge device as tubular reactor, prevent that Yin Wendu from increasing slip obstruction tubular reactor when damaging tubular reactor parts and parking suddenly.
Add steam preheating, 2 minutes warm up time by steam-in 7 first during use.After the tubular reactor preheating, gas ammonia from the ammonia station enters tubular reactor by ammonia-feeding pipe after metering, pressure-controlling is at 0.4～0.6Mpa, sulfuric acid is carried by sulfuric acid pump, join after metering in the tubular reactor, sulfuric acid and ammonia carry out complete reaction in tubular reactor, for guaranteeing not generate ammonium sulfate crystallization body plug nozzle, the additional proportion of ammonia and sulfuric acid is between 1:3～4.Nozzle is installed on the elbows of 90 degree, elbow can make the bed of material of tubular reactor in the tablets press more close to, reduce the loss of heat midway.The diameter of nozzle is 30～40% of elbow diameter, the ammoniumsulphate soln energy is well atomized also be sprayed at uniformly on the interior material bed of material of tablets press, finishes granulation process with other material.After the parking, add steam by steam-in 7 and purge, purge time 3 minutes prevents residual ammoniumsulphate soln Crystallization Plugging tubular reactor.
Above-described embodiment only is used for illustrating technological thought of the present invention and characteristics, its purpose is to make those skilled in the art can understand content of the present invention and implements according to this, can not only limit claim of the present invention with present embodiment, be equal variation or the modification that all disclosed spirit is done, still drop in the claim of the present invention.
Claims (5)
1. tubular reactor for the preparation of propylhomoserin method composite fertilizer, it is characterized in that, comprise the Y-tube (1) that level links to each other successively, a plurality of reaction tubess (2), elbow (4) and nozzle (5), Y-tube (1) is suitable for reading to be acid inlet (8), be inserted with ammonia-feeding pipe (6) in another level mouth of Y-tube (1), ammonia-feeding pipe (6) was inserted into acid inlet and was not less than 20mm, be provided with the steam-in (7) of using front preheating and using post-purge as tubular reactor on the ammonia-feeding pipe (6), described Y-tube (1), reaction tubes (2), elbow (4) and nozzle (5) are built-in carborudum tube (11), the centre is lined with the fixedly PTFE of carborudum tube (10), the multiple-unit tube of outer steel pipe (9), described ammonia-feeding pipe (6) are stainless steel lined PTFE pipe.
2. the tubular reactor for the preparation of propylhomoserin method composite fertilizer according to claim 1, it is characterized in that, described Y-tube (1), a plurality of reaction tubes (2), elbow (4) are connected 5 with nozzle) middle flange connection, the cushion that pad adopts PTFE to make of adopting.
3. the tubular reactor for the preparation of propylhomoserin method composite fertilizer according to claim 1 is characterized in that, described Y-tube (1) is straight tee (1), and elbow (4) is 90 degree elbows.
4. the tubular reactor for the preparation of propylhomoserin method composite fertilizer according to claim 3 is characterized in that, described Y-tube (1), reaction tubes (2), elbow (4) length are 500mm.
5. the tubular reactor for the preparation of propylhomoserin method composite fertilizer according to claim 4 is characterized in that, described reaction tubes (2) is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012104351309A CN102875218A (en) | 2012-11-05 | 2012-11-05 | Tube type reactor for preparing ammonia-acid method compound fertilizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104351309A CN102875218A (en) | 2012-11-05 | 2012-11-05 | Tube type reactor for preparing ammonia-acid method compound fertilizer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103396195A (en) * | 2013-08-09 | 2013-11-20 | 辽宁津大肥业有限公司 | Urea sulfate reactor and application thereof |
| CN106268499A (en) * | 2015-05-29 | 2017-01-04 | 林新吉 | Automatization's granulating system and comminutor thereof |
| CN107281995A (en) * | 2017-07-19 | 2017-10-24 | 陈宗良 | A kind of sour method composite fertilizer tubular reactor |
| CN108484322A (en) * | 2018-04-11 | 2018-09-04 | 李玉华 | Fulvic acid double superhosphate potassium dihydrogen phosphate ammophos preparation method and system |
Citations (7)
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| JPS582283A (en) * | 1981-06-26 | 1983-01-07 | コ−プケミカル株式会社 | Manufacture of fertilizer containing condensed phosphate |
| WO2006093413A1 (en) * | 2005-03-02 | 2006-09-08 | Yara International Asa | Pipe reactor and plant for manufacturing of especially urea ammonium sulphate |
| CN200943062Y (en) * | 2006-01-27 | 2007-09-05 | 许洪兴 | Sulfuric acid ammonia tubular reactor |
| CN200992489Y (en) * | 2006-12-20 | 2007-12-19 | 冯玉海 | Sulfuric acid, ammonia tubular reactor |
| CN201626923U (en) * | 2009-09-30 | 2010-11-10 | 湖北祥云(集团)化工股份有限公司 | Tubular reactor for compound fertilizer granulation |
| CN201906599U (en) * | 2010-11-29 | 2011-07-27 | 张星辰 | Annular gas-liquid reactor |
| CN202881115U (en) * | 2012-11-05 | 2013-04-17 | 天津芦阳化肥股份有限公司 | Tubular reactor for preparing ammonia and acid process compound fertilizer |
-
2012
- 2012-11-05 CN CN2012104351309A patent/CN102875218A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS582283A (en) * | 1981-06-26 | 1983-01-07 | コ−プケミカル株式会社 | Manufacture of fertilizer containing condensed phosphate |
| WO2006093413A1 (en) * | 2005-03-02 | 2006-09-08 | Yara International Asa | Pipe reactor and plant for manufacturing of especially urea ammonium sulphate |
| CN200943062Y (en) * | 2006-01-27 | 2007-09-05 | 许洪兴 | Sulfuric acid ammonia tubular reactor |
| CN200992489Y (en) * | 2006-12-20 | 2007-12-19 | 冯玉海 | Sulfuric acid, ammonia tubular reactor |
| CN201626923U (en) * | 2009-09-30 | 2010-11-10 | 湖北祥云(集团)化工股份有限公司 | Tubular reactor for compound fertilizer granulation |
| CN201906599U (en) * | 2010-11-29 | 2011-07-27 | 张星辰 | Annular gas-liquid reactor |
| CN202881115U (en) * | 2012-11-05 | 2013-04-17 | 天津芦阳化肥股份有限公司 | Tubular reactor for preparing ammonia and acid process compound fertilizer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103396195A (en) * | 2013-08-09 | 2013-11-20 | 辽宁津大肥业有限公司 | Urea sulfate reactor and application thereof |
| CN103396195B (en) * | 2013-08-09 | 2015-02-25 | 辽宁津大肥业有限公司 | Urea sulfate reactor and application thereof |
| CN106268499A (en) * | 2015-05-29 | 2017-01-04 | 林新吉 | Automatization's granulating system and comminutor thereof |
| CN107281995A (en) * | 2017-07-19 | 2017-10-24 | 陈宗良 | A kind of sour method composite fertilizer tubular reactor |
| CN108484322A (en) * | 2018-04-11 | 2018-09-04 | 李玉华 | Fulvic acid double superhosphate potassium dihydrogen phosphate ammophos preparation method and system |
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Application publication date: 20130116 |