CN210237472U - Production device of agricultural chemical fertilizer monoammonium phosphate - Google Patents
Production device of agricultural chemical fertilizer monoammonium phosphate Download PDFInfo
- Publication number
- CN210237472U CN210237472U CN201920819265.2U CN201920819265U CN210237472U CN 210237472 U CN210237472 U CN 210237472U CN 201920819265 U CN201920819265 U CN 201920819265U CN 210237472 U CN210237472 U CN 210237472U
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- CN
- China
- Prior art keywords
- ammonia
- kettle
- pipe
- heat exchanger
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 title claims abstract description 20
- 235000019837 monoammonium phosphate Nutrition 0.000 title claims abstract description 20
- 239000003337 fertilizer Substances 0.000 title claims abstract description 19
- 239000006012 monoammonium phosphate Substances 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000003905 agrochemical Substances 0.000 title abstract description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 109
- 238000011084 recovery Methods 0.000 claims abstract description 40
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 9
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 241000282849 Ruminantia Species 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- PYCBFXMWPVRTCC-UHFFFAOYSA-N ammonium metaphosphate Chemical compound N.OP(=O)=O PYCBFXMWPVRTCC-UHFFFAOYSA-N 0.000 description 1
- 239000003674 animal food additive Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Fertilizers (AREA)
Abstract
The utility model discloses an agricultural chemical fertilizer monoammonium phosphate's apparatus for producing relates to chemical fertilizer production field. The method aims at solving the problems that the energy consumption is high and the ammonia temperature cannot be reasonably utilized in the prior art. The production device comprises a reaction kettle, wherein the feed end of the reaction kettle is connected with a wet-process phosphoric acid tank, the gas inlet end of the reaction kettle is connected with an ammonia tank, the discharge end of the reaction kettle is connected with a solid-liquid separator, and the gas release end of the reaction kettle passes through one end of a heat exchanger and then is connected with the gas inlet end of an ammonia recovery kettle; a steam generator is connected with the steam end of the ammonia gas recovery kettle, and the gas outlet end of the ammonia gas recovery kettle flows through the other end of the heat exchanger and then flows back to the ammonia gas tank; the heat exchanger is used for transferring the heat of the pipeline corresponding to the outlet end of the ammonia recovery kettle to the pipeline corresponding to the inlet end of the ammonia recovery kettle. Through the arrangement of the heat exchanger, the heat of the precipitated gas with overhigh temperature is transferred to the pipeline corresponding to the gas inlet end, so that the energy consumed for maintaining the temperature of the ammonia recovery kettle can be effectively reduced. Meanwhile, the reaction quality of the reaction kettle can be prevented from being influenced by overhigh temperature in the ammonia gas tank, and the yield is improved.
Description
Technical Field
The utility model relates to a chemical fertilizer production field especially relates to an agricultural chemical fertilizer monoammonium phosphate's apparatus for producing.
Background
Ammonium dihydrogen phosphate, a chemical agent, also called monoammonium phosphate, is a white crystal with a chemical formula of NH4H2PO4, can be decomposed into ammonium metaphosphate (NH4PO3) by heating, can be prepared by the reaction of ammonia water and phosphoric acid, is mainly used as a fire retardant for fertilizers and wood, paper and fabrics, and is also used as a feed additive for pharmacy and ruminants.
The agricultural fertilizer grade monoammonium phosphate can be obtained by reacting wet-process phosphoric acid and ammonia gas in a reaction kettle, and the obtained product can be subjected to solid-liquid separation to obtain a finished product of the monoammonium phosphate and other byproducts. As the reaction process cannot completely finish the ammonia gas reaction, part of the ammonia gas is necessarily leaked. And the leaked ammonia gas is recovered through an ammonia gas recovery kettle and then flows back to an ammonia gas tank for repeated use. The ammonia gas recovery kettle mainly utilizes a large amount of water to dissolve ammonia gas, and high-temperature steam is introduced to separate out water-soluble ammonia gas during recovery. In order to improve the precipitation efficiency, the ammonia gas recovery kettle consumes energy to keep a certain temperature without reduction. On the other hand, the temperature of the precipitated ammonia gas is high, and the ammonia gas is not suitable for being directly refluxed into the reaction kettle for direct use, because the monoammonium phosphate is decomposed due to the high temperature.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model aims to provide a production device of agricultural fertilizer monoammonium phosphate.
The utility model relates to a production device of agricultural chemical fertilizer monoammonium phosphate, which comprises a reaction kettle, wherein the feed end of the reaction kettle is connected with a wet-process phosphoric acid tank, the gas inlet end is connected with an ammonia tank, the discharge end is connected with a solid-liquid separator, and the gas release end is connected with the gas inlet end of an ammonia recovery kettle after passing through one end of a heat exchanger; a steam generator is connected with the steam end of the ammonia gas recovery kettle, and the gas outlet end of the ammonia gas recovery kettle flows through the other end of the heat exchanger and then flows back to the ammonia gas tank; the heat exchanger is used for transferring the heat of the pipeline corresponding to the gas outlet end of the ammonia recovery kettle to the pipeline corresponding to the gas inlet end of the ammonia recovery kettle.
A production device of agricultural chemical fertilizer monoammonium phosphate, its advantage lies in, through the setting of heat exchanger, with the high-temperature pipeline that corresponds of heat transfer to the inlet end of the gaseous precipitation, can effectively reduce the energy of consuming in order to maintain ammonia recovery cauldron temperature. Meanwhile, the reaction quality of the reaction kettle can be prevented from being influenced by overhigh temperature in the ammonia gas tank, and the yield is improved.
Preferably, the heat exchanger comprises a first air return pipe, a spiral heat exchange pipe and a second air return pipe which are sequentially connected in series, and further comprises an air leakage pipe sleeved in the middle of the spiral heat exchange pipe; the air leakage pipe is used for connecting the air leakage end of the reaction kettle and the air inlet end of the ammonia recovery kettle; the first air return pipe is used for connecting an ammonia tank, and the second air return pipe is used for connecting an air outlet end of the ammonia recovery kettle.
Preferably, the diameters of the spiral heat exchange tubes are smaller than those of the first air return tube, the spiral heat exchange tubes and the second air return tube; the heat exchanger is also provided with an adjusting pipe, the adjusting pipe and the spiral heat exchange pipe are connected between the first air return pipe and the second air return pipe in parallel, and the adjusting pipe is also provided with an opening valve. Because the cross section of the spiral heat exchange tube is relatively small, excessive resistance can occur in the high-power reaction process, and the excessive resistance is fed back to the ammonia gas recovery kettle to block exhaust. The setting of control tube can in time adjust the opening valve, avoids the problem.
Preferably, the sum of the cross section of the adjusting pipe and the cross section of the spiral heat exchange pipe is not less than the cross section of the first air return pipe or the second air return pipe.
Preferably, the gas outlet end of the ammonia gas recovery kettle passes through the other end of the heat exchanger, is connected with a dryer in series, and then flows back to the ammonia gas tank.
Drawings
FIG. 1 is a schematic structural diagram of a production device for monoammonium phosphate in an agricultural chemical fertilizer according to the present invention;
fig. 2 is a schematic structural diagram of the heat exchanger.
Description of the drawings: 10-a reaction kettle, 11-a solid-liquid separator, 12-an ammonia gas recovery kettle, 13-an ammonia gas tank, 14-a wet phosphoric acid tank and 15-a steam generator; 20-heat exchanger, 21-first air return pipe, 22-spiral heat exchange pipe, 23-second air return pipe, 24-air release pipe, 25-adjusting pipe and 26-opening valve; 30-a dryer.
Detailed Description
As shown in figures 1-2, a production device of agricultural chemical fertilizer monoammonium phosphate include reation kettle 10, reation kettle 10 feed end connect wet process phosphoric acid jar 14, ammonia tank 13 is connected to the inlet end, solid-liquid separation machine 11 is connected to the discharge end, leak the end and connect the ammonia behind heat exchanger 20 one end and retrieve cauldron 12 inlet end. The steam generator 15 is connected with the steam end of the ammonia recovery kettle 12, and the air outlet end of the ammonia recovery kettle 12 flows through the other end of the heat exchanger 20 and then flows back to the ammonia tank 13. The heat exchanger 20 is used for transferring the heat of the pipeline corresponding to the outlet end of the ammonia gas recovery kettle 12 to the pipeline corresponding to the inlet end of the ammonia gas recovery kettle 12.
The heat exchanger 20 comprises a first air return pipe 21, a spiral heat exchange pipe 22 and a second air return pipe 23 which are sequentially connected in series, and further comprises an air leakage pipe 24 sleeved in the middle of the spiral heat exchange pipe 22. The air leakage pipe 24 is used for connecting the air leakage end of the reaction kettle 10 and the air inlet end of the ammonia gas recovery kettle 12. The first air return pipe 21 is used for connecting the ammonia tank 13, and the second air return pipe 23 is used for connecting the air outlet end of the ammonia recovery kettle 12. The diameters of the spiral heat exchange pipes 22 are all smaller than the diameters of the first air return pipe 21, the spiral heat exchange pipes 22 and the second air return pipe 23. The heat exchanger 20 is further provided with an adjusting pipe 25, the adjusting pipe 25 and the spiral heat exchange pipe 22 are connected in parallel between the first air return pipe 21 and the second air return pipe 23, and the adjusting pipe 25 is further provided with an opening valve 26. The sum of the cross section of the adjusting pipe 25 and the cross section of the spiral heat exchange pipe 22 is not less than the cross section of the first air return pipe 21 or the second air return pipe 23. The opening valve 26 is used for adjusting the opening of the adjusting pipe 25.
The gas outlet end of the ammonia gas recovery kettle 12 passes through the other end of the heat exchanger 20 and then is connected in series with a drier 30 before flowing back to the ammonia gas tank 13.
A production device of agricultural chemical fertilizer monoammonium phosphate theory of operation as follows, at first drop into reation kettle 10 with the material in wet process phosphoric acid tank 14, then let in proper amount ammonia. The reaction vessel 10 is reacted under a known reaction condition, the product is sent to a solid-liquid separator 11 to be subjected to solid-liquid separation, the supernatant is discharged as a by-product, and the lower turbid material is discharged as a finished product. During the reaction, the excess ammonia gas will be discharged to the ammonia gas recovery kettle 12, and the path of the discharge will pass through the air leakage pipe 24. The ammonia gas is dissolved by the water in the ammonia gas recovery kettle 12, and then the steam generator 15 injects high-temperature steam into the ammonia gas recovery kettle 12 to re-separate out the dissolved ammonia gas under the permission of process conditions. The high-temperature precipitated ammonia gas flows through the second air return pipe 23, the spiral heat exchange pipe 22, the first air return pipe 21 and the dryer 30 and then flows back to the ammonia gas tank 13. The opening degree of the opening degree valve 26 can be selectively adjusted according to the air pressure. Under the condition that the process is stable and continuous, the high-temperature ammonia gas in the spiral heat exchange tube 22 exchanges heat with the ammonia gas in the air escape tube 24. The energy required for maintaining the temperature of the ammonia gas recovery kettle 12 is reduced, and the temperature of the ammonia gas which is returned to the ammonia gas tank 13 is also reduced.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.
Claims (5)
1. The production device of the agricultural fertilizer monoammonium phosphate is characterized by comprising a reaction kettle (10), wherein the feed end of the reaction kettle (10) is connected with a wet-process phosphoric acid tank (14), the gas inlet end of the reaction kettle is connected with an ammonia tank (13), the gas outlet end of the reaction kettle is connected with a solid-liquid separator (11), and the gas outlet end of the reaction kettle passes through one end of a heat exchanger (20) and then is connected with the gas inlet end of an ammonia recovery kettle (12); a steam generator (15) is connected with the steam end of the ammonia recovery kettle (12), and the air outlet end of the ammonia recovery kettle (12) flows through the other end of the heat exchanger (20) and then flows back to the ammonia tank (13); the heat exchanger (20) is used for transferring the heat of the pipeline corresponding to the air outlet end of the ammonia gas recovery kettle (12) to the pipeline corresponding to the air inlet end of the ammonia gas recovery kettle (12).
2. The apparatus for producing monoammonium phosphate in agricultural fertilizer as claimed in claim 1, wherein the heat exchanger (20) comprises a first air return pipe (21), a spiral heat exchange pipe (22) and a second air return pipe (23) which are connected in series in sequence, and further comprises an air leakage pipe (24) sleeved in the middle of the spiral heat exchange pipe (22); the air leakage pipe (24) is used for connecting the air leakage end of the reaction kettle (10) and the air inlet end of the ammonia recovery kettle (12); the first air return pipe (21) is used for being connected with an ammonia tank (13), and the second air return pipe (23) is used for being connected with an air outlet end of the ammonia recovery kettle (12).
3. The apparatus for producing monoammonium phosphate for agricultural fertilizers according to claim 2, wherein the diameters of the spiral heat exchange pipes (22) are all smaller than the first air return pipe (21), the spiral heat exchange pipes (22) and the second air return pipe (23); the heat exchanger (20) is further provided with an adjusting pipe (25), the adjusting pipe (25) and the spiral heat exchange pipe (22) are connected between the first air return pipe (21) and the second air return pipe (23) in parallel, and the adjusting pipe (25) is further provided with an opening valve (26).
4. The apparatus for producing monoammonium phosphate for agricultural fertilizer as claimed in claim 3, wherein the sum of the cross section of the adjusting pipe (25) and the cross section of the spiral heat exchange pipe (22) is not less than the cross section of the first air return pipe (21) or the second air return pipe (23).
5. The apparatus for producing monoammonium phosphate for agricultural fertilizer as claimed in claim 1, wherein the outlet end of the ammonia recovery kettle (12) passes through the other end of the heat exchanger (20) and then is connected in series with a dryer (30) before flowing back to the ammonia tank (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920819265.2U CN210237472U (en) | 2019-05-31 | 2019-05-31 | Production device of agricultural chemical fertilizer monoammonium phosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920819265.2U CN210237472U (en) | 2019-05-31 | 2019-05-31 | Production device of agricultural chemical fertilizer monoammonium phosphate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210237472U true CN210237472U (en) | 2020-04-03 |
Family
ID=69973278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920819265.2U Expired - Fee Related CN210237472U (en) | 2019-05-31 | 2019-05-31 | Production device of agricultural chemical fertilizer monoammonium phosphate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210237472U (en) |
-
2019
- 2019-05-31 CN CN201920819265.2U patent/CN210237472U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200403 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |