CN110940184A - Method and device for cooling dried finished calcium dihydrogen phosphate product produced by wet-process phosphoric acid - Google Patents
Method and device for cooling dried finished calcium dihydrogen phosphate product produced by wet-process phosphoric acid Download PDFInfo
- Publication number
- CN110940184A CN110940184A CN201911402369.4A CN201911402369A CN110940184A CN 110940184 A CN110940184 A CN 110940184A CN 201911402369 A CN201911402369 A CN 201911402369A CN 110940184 A CN110940184 A CN 110940184A
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- China
- Prior art keywords
- cooler
- cooling
- wet
- phosphoric acid
- dihydrogen phosphate
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- 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.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 45
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims abstract description 32
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 title claims abstract description 20
- 235000019691 monocalcium phosphate Nutrition 0.000 title claims abstract description 20
- 229940062672 calcium dihydrogen phosphate Drugs 0.000 title claims abstract description 19
- 229910000389 calcium phosphate Inorganic materials 0.000 title claims abstract description 19
- 229910000147 aluminium phosphate Inorganic materials 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 8
- 239000003507 refrigerant Substances 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000001506 calcium phosphate Substances 0.000 claims 1
- 229910000150 monocalcium phosphate Inorganic materials 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000007613 slurry method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a method and a device for cooling a dried finished product of calcium dihydrogen phosphate produced by a wet-process phosphoric acid slurry method. The method uses a powder flow heat exchanger as a cooling process carrier, uses low-temperature clean circulating water and cold dry air as refrigerants to cool a dried finished product, and recycles the circulating water, wherein the cooling process is performed in a fully-closed powder flow cooler. The invention solves the difficult problems of moisture absorption, dust pollution and energy saving and space saving in the cooling process of the wet-process phosphoric acid slurry method for producing the calcium dihydrogen phosphate dry product, and meanwhile, the cooling process is clean and free of dust pollution, the cooling index of the dry finished product is stable, and the process, the environment protection, the energy consumption and the space index performance are outstanding.
Description
Technical Field
The invention relates to the field of chemical product cooling methods, in particular to a method and a device for cooling a dried finished product of calcium dihydrogen phosphate produced by phosphoric acid by a wet process.
Background
In the process of producing calcium dihydrogen phosphate by using wet-process phosphoric acid, most of moisture in calcium dihydrogen phosphate slurry is removed by drying, and the dried finished product (70-80 ℃) is cooled and cooled to 30-40 ℃ for further dehumidification and heat removal, so that the packaging performance requirement of the product is met. When the dried calcium dihydrogen phosphate finished product is cooled, the traditional cooling method is easy to bring moisture in natural air, the hygroscopicity of the calcium dihydrogen phosphate product is strong, and the moisture absorption is very easy in the cooling process; in addition, the traditional cooling equipment has large occupied area and large sealing difficulty, and dust is easy to leak to cause pollution. A reasonable cooling method for the dried finished product is selected, natural air is isolated, the material cooling process is effectively sealed, moisture absorption and dust leakage are prevented, energy can be comprehensively saved, and space is saved, so that the method is of great importance.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method and a device for cooling a dried product of calcium dihydrogen phosphate produced by wet-process phosphoric acid, so as to reduce the influence of cooling on the product quality and the production environment in the production of calcium dihydrogen phosphate, effectively avoid the moisture absorption of the product and ensure the product quality.
A cooling method for a dried finished product of calcium dihydrogen phosphate produced by wet-process phosphoric acid is characterized in that a powder flow heat exchanger is used as a cooling process carrier, low-temperature clean circulating water and cold dry air are used as refrigerants to cool the dried finished product, the circulating water is recycled, and the cooling process is carried out in a fully-closed powder flow cooler.
The temperature of the low-temperature clean circulating water is 20-30 ℃, and the temperature of the cold dry air is 25-30 ℃.
In the method, the material liquid level of the cooler is controlled to be 20-80% through automatic interlocking control.
A cooling device for a dry finished product of calcium dihydrogen phosphate produced by wet-process phosphoric acid, in particular to a cooling device for a dry finished product of calcium dihydrogen phosphate produced by wet-process phosphoric acid. It is characterized in that the utility model mainly comprises a Roots blower, a dehumidifier, a cooler and a water cooling tower; the roots blower is connected with the dehumidifier through a pipeline, the dehumidifier is connected with the cooler through a pipeline, and the cooler is connected with the cooling tower through a pipeline and a circulating pump; the cooler consists of a feeding bin, a heat transfer plate group and a discharging hopper.
The feed inlet of the cooler is arranged at the top of the cooler, and the discharge outlet is arranged at the bottom of the cooler.
The lower part of the cooler is provided with a circulating water inlet, and the upper part of the cooler is provided with a circulating water outlet.
And an exhaust port of the cooler is arranged at the top.
The cooler is also provided with a level indicator.
The invention solves the difficult problems of moisture absorption, dust pollution and energy saving and space saving in the cooling process of the wet-process phosphoric acid slurry method for producing the calcium dihydrogen phosphate dry product, and meanwhile, the cooling process is clean and free of dust pollution, the cooling index of the dry finished product is stable, and the process, the environment protection, the energy consumption and the space index performance are outstanding.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic diagram of the apparatus of the present invention.
In the figure: 1 is a Roots blower; 2 is a dehumidifier; 3 is a cooler; 4 is a water cooling tower; 5 is a feeding bin; 6 is a heat transfer plate group; 7 is a discharge hopper; 8 is a feed inlet; 9 is a discharge hole; 10 is an exhaust port; 11 is a circulating water inlet; 12 is a circulating water outlet.
Detailed Description
Examples
A cooling method for a dried finished product of calcium dihydrogen phosphate produced by wet-process phosphoric acid is characterized in that a powder flow heat exchanger is used as a cooling process carrier, and the material liquid level of a cooler is controlled to be 20% -80% by automatic interlocking control. And cooling the dried finished product by using low-temperature clean circulating water and cold dry air as refrigerants, wherein the temperature of the low-temperature clean circulating water is 20-30 ℃, and the temperature of the cold dry air is 25-30 ℃. Circulating water is recycled, and the cooling process is carried out in a totally-enclosed powder flow cooler.
The device adopted for realizing the method mainly comprises a Roots blower 1, a dehumidifier 2, a cooler 3 and a water cooling tower 4. The roots blower 1 is connected with the dehumidifier 2 through a pipeline, the dehumidifier 2 is connected with the cooler 3 through a pipeline, and the cooler 3 is connected with the water cooling tower 4 through a pipeline and a circulating pump. The cooler 3 consists of a feeding bin 5, a heat transfer plate group 6 and a discharging hopper 7.
The inlet 8 of the cooler 3 is arranged at the top thereof and the outlet 9 is arranged at the bottom thereof. The lower part of the cooler 3 is provided with a circulating water inlet 11, and the upper part of the cooler 3 is provided with a circulating water outlet 12. The exhaust port 10 of the cooler 5 is provided at the top. The cooler 3 is provided with a level gauge.
The invention has the following advantages:
(1) the process index is stable, and the product can be effectively prevented from absorbing moisture in the cooling process;
(2) the dust leakage is controlled to the maximum extent, and the production environment is improved;
(3) and energy consumption and equipment installation space can be greatly saved.
Claims (8)
1. A cooling method for a dried finished product of calcium dihydrogen phosphate produced by wet-process phosphoric acid is characterized in that a powder flow heat exchanger is used as a cooling process carrier, low-temperature clean circulating water and cold dry air are used as refrigerants to cool the dried finished product, the circulating water is recycled, and the cooling process is carried out in a fully-closed powder flow cooler.
2. The method for cooling the dried finished product of the production of the monocalcium phosphate by the wet process phosphoric acid according to claim 1, wherein the temperature of the low-temperature clean circulating water is 20-30 ℃, and the temperature of the cold dry air is 25-30 ℃.
3. The cooling method for the dried finished calcium dihydrogen phosphate product produced by wet-process phosphoric acid according to claim 1, wherein the material liquid level of the cooler is controlled to be 20-80% by automatic interlocking.
4. A cooling device for a dry finished product of calcium dihydrogen phosphate produced by wet-process phosphoric acid is characterized by mainly comprising a Roots blower (1), a dehumidifier (2), a cooler (3) and a water cooling tower (4); the roots blower (1) is connected with the dehumidifier (2) through a pipeline, the dehumidifier (2) is connected with the cooler (3) through a pipeline, and the cooler (3) is connected with the cooling tower (4) through a pipeline and a circulating pump; the cooler (3) consists of a feeding bin (5), a heat transfer plate group (6) and a discharging hopper (7).
5. A cooling device according to claim 4, wherein the inlet opening (8) of the cooler (3) is arranged at the top thereof and the outlet opening (9) is arranged at the bottom thereof.
6. A cooling arrangement according to claim 4, characterised in that the cooler (3) is provided with a circulating water inlet (11) in its lower part and a circulating water outlet (12) in its upper part.
7. A cooler arrangement according to claim 4, characterised in that the air outlet (10) of the cooler (3) is arranged at the top.
8. A cooler arrangement according to claim 4, characterised in that the cooler (3) has a level gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911402369.4A CN110940184A (en) | 2019-12-31 | 2019-12-31 | Method and device for cooling dried finished calcium dihydrogen phosphate product produced by wet-process phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911402369.4A CN110940184A (en) | 2019-12-31 | 2019-12-31 | Method and device for cooling dried finished calcium dihydrogen phosphate product produced by wet-process phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110940184A true CN110940184A (en) | 2020-03-31 |
Family
ID=69913287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911402369.4A Pending CN110940184A (en) | 2019-12-31 | 2019-12-31 | Method and device for cooling dried finished calcium dihydrogen phosphate product produced by wet-process phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110940184A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5546673A (en) * | 1995-05-19 | 1996-08-20 | The Conair Group, Inc. | Plastic pellet dryer control system equipped with a temperature protection device for the heating unit |
| US5909943A (en) * | 1997-11-07 | 1999-06-08 | Aeroglide Corporation | Apparatus for cooling or drying bulk material |
| CN202403569U (en) * | 2011-12-28 | 2012-08-29 | 北京广厦环能科技有限公司 | Powder cooler |
| CN202414770U (en) * | 2012-01-06 | 2012-09-05 | 江苏晨丰机电设备制造有限公司 | Powder cooler |
| CN202680403U (en) * | 2012-07-03 | 2013-01-23 | 桂林梁华生物科技有限公司 | Silk noodles and vermicelli vertical cooler |
| CN203869562U (en) * | 2014-04-16 | 2014-10-08 | 洛阳隆华传热节能股份有限公司 | Particle cooling system |
| CN211400737U (en) * | 2019-12-31 | 2020-09-01 | 瓮福（集团）有限责任公司 | Dry finished product cooling device of wet process phosphoric acid production monocalcium phosphate |
-
2019
- 2019-12-31 CN CN201911402369.4A patent/CN110940184A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5546673A (en) * | 1995-05-19 | 1996-08-20 | The Conair Group, Inc. | Plastic pellet dryer control system equipped with a temperature protection device for the heating unit |
| US5909943A (en) * | 1997-11-07 | 1999-06-08 | Aeroglide Corporation | Apparatus for cooling or drying bulk material |
| CN202403569U (en) * | 2011-12-28 | 2012-08-29 | 北京广厦环能科技有限公司 | Powder cooler |
| CN202414770U (en) * | 2012-01-06 | 2012-09-05 | 江苏晨丰机电设备制造有限公司 | Powder cooler |
| CN202680403U (en) * | 2012-07-03 | 2013-01-23 | 桂林梁华生物科技有限公司 | Silk noodles and vermicelli vertical cooler |
| CN203869562U (en) * | 2014-04-16 | 2014-10-08 | 洛阳隆华传热节能股份有限公司 | Particle cooling system |
| CN211400737U (en) * | 2019-12-31 | 2020-09-01 | 瓮福（集团）有限责任公司 | Dry finished product cooling device of wet process phosphoric acid production monocalcium phosphate |
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