CN221309553U - Powdery monoammonium phosphate concentration system - Google Patents
Powdery monoammonium phosphate concentration system Download PDFInfo
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- CN221309553U CN221309553U CN202323197659.4U CN202323197659U CN221309553U CN 221309553 U CN221309553 U CN 221309553U CN 202323197659 U CN202323197659 U CN 202323197659U CN 221309553 U CN221309553 U CN 221309553U
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- liquid separator
- heat exchanger
- heater
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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 24
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 title claims abstract description 24
- 235000019837 monoammonium phosphate Nutrition 0.000 title claims abstract description 24
- 239000006012 monoammonium phosphate Substances 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 106
- 239000007788 liquid Substances 0.000 claims abstract description 49
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000003860 storage Methods 0.000 claims abstract description 22
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims description 18
- 230000000694 effects Effects 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 229940098458 powder spray Drugs 0.000 claims description 4
- 238000001694 spray drying Methods 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 12
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 235000010037 flour treatment agent Nutrition 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a concentration system of powdery monoammonium phosphate, and belongs to the technical field of powdery monoammonium phosphate. The system comprises an I-effect flash chamber, an I-effect heater, an I-effect circulating pump, an II-effect flash chamber, an II-effect heater, an II-effect circulating pump, a condenser, a cooling tower, a hot water storage tank, a first gas-liquid separator and a second gas-liquid separator, wherein a condensate outlet of the II-effect heater is connected with the first gas-liquid separator, a condensate outlet of the I-effect heater is connected with the second gas-liquid separator, gas outlets of the first gas-liquid separator and the second gas-liquid separator are connected with an air heat exchanger, and liquid outlets of the first gas-liquid separator and the second gas-liquid separator are respectively connected with the hot water storage tank and a steam generating device. The steam of the I-effect heater and the II-effect heater is recovered through the gas-liquid separator, the heat requirement of the air heat exchanger can be basically met through calculation, and the requirement of the ammonia heat exchanger can still be met when the temperature of the cooled II-effect heater condensate water is reduced.
Description
Technical Field
The utility model belongs to the technical field of powdery monoammonium phosphate, and particularly relates to a powdery monoammonium phosphate concentration system.
Background
Monoammonium phosphate, also called monoammonium phosphate, is an inorganic compound, has a chemical formula of NH 4H2PO4, is white crystalline powder, is slightly soluble in ethanol and is insoluble in acetone, and is mainly used as a fire retardant for wood, fabrics and paper, and can also be used as a chemical fertilizer, a bread improver and a food additive.
Powdery monoammonium phosphate is commonly used for preparing fertilizer, and the preparation process is as follows: the ammonia gas reacts with the wet phosphoric acid in a reactor, the reaction is finished, the reaction is concentrated in a multi-effect concentrating device, then powder is sprayed in a powder spraying drying device, and finally the product is obtained after packaging.
A common multi-effect concentration device is described in patent application number CN201220688600.8 and comprises a one-effect concentration system and a two-effect concentration system, wherein the one-effect concentration system is sequentially connected by a one-effect flash chamber, a one-effect heat exchanger and a one-effect circulating pump; the second-effect concentration system is formed by sequentially connecting a second-effect flash chamber, a second-effect heat exchanger and a second-effect circulating pump in a pipe mode, and is characterized in that an outlet of the first-effect flash chamber is connected with an inlet pipe of the second-effect circulating pump.
The use of water and heat is involved in the concentration process. Further, referring to fig. 1, in the existing monoammonium phosphate concentration system, condensed water of the ii-effect heater and condensed water of the ii-effect flash chamber (steam is condensed by a condenser) are sent to an ammonia heat exchanger to be used as heat sources, and the condensed water of the i-effect heater is sent to a steam generating device to be reused so as to reduce the consumption of desalted water and reduce the energy consumption, and the steam of the i-effect flash chamber and the reactor is sent to the ii-effect heater to be used as heat sources. The applicant finds that when the above process is adopted, the condensed water of the II-effect heater contains a large amount of steam and has a higher temperature (the temperature of the liquid ammonia is low, and the temperature difference between two exchange media of the heat exchanger cannot be too large), so that the steam is wasted, the requirement on the ammonia heat exchanger is high, and the ammonia heat exchanger is more than available. The condensed water of the I-effect heater contains more steam, and the steam waste is larger.
Disclosure of utility model
The embodiment of the utility model provides a concentration system of powdery monoammonium phosphate, the applicant can recycle the steam of an I-effect heater and a II-effect heater through a gas-liquid separator, and the heat requirement of an air heat exchanger can be basically met through practice, and the condensed water of the II-effect heater after cooling can still meet the requirement of an ammonia heat exchanger while reducing the temperature. The technical scheme is as follows:
The embodiment of the utility model provides a concentration system of powdery monoammonium phosphate, which comprises an I-effect flash chamber, an I-effect heater, an I-effect circulating pump, an II-effect flash chamber, an II-effect heater, an II-effect circulating pump, a condenser, a cooling tower, a hot water storage tank, a first gas-liquid separator and a second gas-liquid separator, wherein a condensed water outlet of the II-effect heater is connected with the first gas-liquid separator, a condensed water outlet of the I-effect heater is connected with the second gas-liquid separator, gas outlets of the first gas-liquid separator and the second gas-liquid separator are both connected with an air heat exchanger, and liquid outlets of the first gas-liquid separator and the second gas-liquid separator are respectively connected with the hot water storage tank and a steam generating device.
The device comprises an effect-II flash chamber, an effect-II heater and an effect-II circulating pump, wherein the effect-II flash chamber, the effect-II heater and the effect-II circulating pump form a circulating concentration structure, the effect-II flash chamber is connected with a circulating pump, a steam inlet of the effect-II heater is connected with an air outlet of a reactor and an air outlet of the effect-I flash chamber, and an air outlet of the effect-II flash chamber is connected with an air inlet of a condenser; the device is characterized in that the I-effect flash chamber, the I-effect heater and the I-effect circulating pump form a circulating concentration structure, an inlet of the I-effect circulating pump is connected with an outlet of the II-effect circulating pump, an outlet of the I-effect circulating pump is connected with a high-pressure pump of the powder spraying drying device, and a steam inlet of the I-effect heater is connected with the steam generating device.
The steam generating device comprises a desalted water preparation structure, a desalted water storage tank, a deaerator and a boiler which are sequentially connected, wherein a liquid outlet of the second gas-liquid separator is connected with the desalted water storage tank, and the boiler is connected with a steam inlet of the I-effect heater.
Further, a circulating water tank is arranged right below the cooling tower, and a water supplementing port of the circulating water tank is connected with a process water tank; the cold water inlet of the condenser is connected with the circulating water tank, the hot water outlet of the condenser is connected with the cold water tower, the steam inlet of the condenser is connected with the II-effect flash chamber, and the condensed water outlet of the condenser is connected with the hot water storage tank.
The hot water storage tank is connected with a hot water inlet of the ammonia heat exchanger, and a cold water outlet of the ammonia heat exchanger is connected with a process water tank.
The powder spraying and drying device comprises a high-pressure pump, a powder spraying and drying tower, an air heat exchanger and a condensate tank, wherein the high-pressure pump is connected with a feed inlet of the powder spraying and drying tower; the hot air outlet of the air heat exchanger is connected with the hot air inlet of the powder spraying drying tower, and the condensed water outlet of the air heat exchanger is connected with the condensed water tank; the condensed water tank is connected with the machine sealing water tank.
The ammonia gas heat exchanger is connected with an ammonia gas inlet of a reactor, and the reactor and a circulating pump form a circulating structure.
The technical scheme provided by the embodiment of the utility model has the beneficial effects that: the embodiment of the utility model provides a concentration system of powdery monoammonium phosphate, the applicant can recycle the steam of an I-effect heater and a II-effect heater through a gas-liquid separator, the heat requirement of an air heat exchanger (the steam of a steam generating device can be supplemented according to the requirement) can be basically met through practice, the cooled II-effect heater condensate water can still meet the requirement of an ammonia heat exchanger while the temperature is reduced, and the energy consumption is reduced.
Drawings
FIG. 1 is a schematic block diagram of a prior art concentration system for powdered monoammonium phosphate;
FIG. 2 is a schematic block diagram of a powdered monoammonium phosphate concentration system in an embodiment of the utility model;
FIG. 3 is a schematic block diagram of a steam generating device;
fig. 4 is a schematic block diagram of a cooling tower, condenser and ii-effect flash chamber combination.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.
Referring to fig. 2-4, the present embodiment provides a concentration system for powdery monoammonium phosphate, which comprises an effect flash chamber, an effect heater, an effect circulating pump, a condenser, a cooling tower, a hot water storage tank, a first gas-liquid separator, a second gas-liquid separator and the like. The reactor and the circulating pump are connected into a ring shape through a pipeline to form a circulating structure, the ammonia heat exchanger is connected with an ammonia inlet of the reactor through a pipeline to provide ammonia, and the wet phosphoric acid storage tank is connected with a phosphoric acid inlet of the reactor through a pipeline to provide phosphoric acid; the ammonia gasification heat exchanger is used for gasifying liquid ammonia to obtain ammonia gas. The second-effect flash chamber, the second-effect heater and the second-effect circulating pump are connected into a ring through pipelines to form a circulating concentration structure, the second-effect flash chamber is connected with the circulating pump (slurry with output water content of 50-60%) through pipelines, a steam inlet of the second-effect heater is connected with an air outlet of the reactor and an air outlet of the second-effect flash chamber through pipelines, an air outlet of the second-effect flash chamber is connected with an air inlet of the condenser through pipelines, and a condensate water outlet of the second-effect heater is connected with the first gas-liquid separator through pipelines. I effect flash chamber, I effect heater and I effect circulating pump pass through the pipe connection and become annular constitution circulation concentrated structure, I effect circulating pump's import passes through the pipe connection with II effect circulating pump's exit linkage and its export passes through the pipeline and is connected with the high-pressure pump of powder spray drying device, I effect heater's steam inlet passes through the pipeline and is connected with steam generator's boiler, I effect heater's comdenstion water export passes through the pipeline and is connected with second gas-liquid separator. The gas outlets of the first gas-liquid separator and the second gas-liquid separator are connected with the steam inlet of the air heat exchanger through pipelines, and the liquid outlets of the first gas-liquid separator and the second gas-liquid separator are respectively connected with a hot water storage tank and a steam generating device (specifically a desalted water storage tank) through pipelines. The hot water storage tank is connected with a hot water inlet of the ammonia heat exchanger through a pipeline, a cold water outlet of the ammonia heat exchanger is connected with a process water tank (which can receive other cleaner water and output the water to other structures (such as a ball mill of a wet-process phosphoric acid production system)) through a pipeline, the process water tank is connected with a water cooling tower through a pipeline, and the water cooling tower and the condenser form a circulating cooling structure through a pipeline.
Taking a 150kt/a yield of powdered monoammonium phosphate production system as an example: the heat exchange area of the I effect heater is 360m 2, and the heat exchange area of the II effect heater is 300m 2.
Referring to fig. 3, the steam generating device in the embodiment of the utility model comprises a desalted water preparation structure, a desalted water storage tank, a deaerator, a boiler and the like which are sequentially connected through pipelines, wherein the desalted water preparation structure is used for preparing desalted water, a liquid outlet of the second gas-liquid separator is connected with the desalted water storage tank through a pipeline, and the boiler is connected with a steam inlet of the i-effect heater and a steam inlet of the air heat exchanger through a pipeline.
Further, referring to fig. 4, a circulating water tank is arranged right below the cooling tower in the embodiment of the utility model, and a water supplementing port of the circulating water tank is connected with a process water tank through a pipeline. The cold water inlet of the condenser is connected with the circulating water pool through a pipeline, the hot water outlet of the condenser is connected with the cold water tower through a pipeline, the steam inlet of the condenser is connected with the II-effect flash chamber through a pipeline, and the condensed water outlet of the condenser is connected with the hot water storage tank through a pipeline.
Referring to fig. 2, the powder spraying and drying device in the embodiment of the utility model comprises a high-pressure pump, a powder spraying and drying tower, an air heat exchanger, a condensate tank and the like, wherein the high-pressure pump (outputting slurry with 25-35% of water content) is connected with a feed inlet of the powder spraying and drying tower through a pipeline. The hot air outlet of the air heat exchanger is connected with the hot air inlet of the powder spraying drying tower through a pipeline (a fan is arranged on the hot air outlet), the air inlet of the air heat exchanger is connected with the air filtering structure through a pipeline, and the condensed water outlet of the air heat exchanger is connected with the condensed water tank through a pipeline. The condensed water tank (which can be output to other structures, such as flushing water used as a production workshop, such as a filter sent to a wet phosphoric acid production system) is connected with the machine sealing water tank through a pipeline, and the machine sealing water tank provides cleaner machine sealing water for the whole system.
The condensate water of the first-effect heater is the cleanest and is used for supplementing desalted water; the condensed water obtained by condensing the gas separated by the first gas-liquid separator and the second gas-liquid separator is cleaner, and can be used as mechanical seal water or other purposes; the condensed water of the II-effect flash chamber and the liquid separated by the first gas-liquid separator have higher ammonia content (possibly containing fluoride), and can be used as water supplement of cooling water after heat exchange.
Compared with the prior art, the method saves 74kg of steam per ton of product, and the steam is calculated as 100 yuan/ton, so that 7.4 yuan/ton of product can be saved.
Wherein, pumps, flow meters or valves and the like are arranged on the pipelines among the structures according to the requirements in the embodiment; the "first" and "second" in this embodiment only play a role of distinction, and have no other special meaning.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (7)
1. The concentration system of powdery monoammonium phosphate comprises an effect flash chamber, an effect heater, an effect circulating pump, a condenser, a cooling tower and a hot water storage tank; the device is characterized by further comprising a first gas-liquid separator and a second gas-liquid separator, wherein a condensate water outlet of the II-effect heater is connected with the first gas-liquid separator, a condensate water outlet of the I-effect heater is connected with the second gas-liquid separator, gas outlets of the first gas-liquid separator and the second gas-liquid separator are connected with an air heat exchanger, and liquid outlets of the first gas-liquid separator and the second gas-liquid separator are respectively connected with a hot water storage tank and a steam generating device.
2. The concentration system of powdery monoammonium phosphate according to claim 1, wherein the effect-ii flash chamber, the effect-ii heater and the effect-ii circulating pump form a circulating concentration structure, the effect-ii flash chamber is connected with the circulating pump, a steam inlet of the effect-ii heater is connected with an air outlet of the reactor and an air outlet of the effect-ii flash chamber, and an air outlet of the effect-ii flash chamber is connected with an air inlet of the condenser; the device is characterized in that the I-effect flash chamber, the I-effect heater and the I-effect circulating pump form a circulating concentration structure, an inlet of the I-effect circulating pump is connected with an outlet of the II-effect circulating pump, an outlet of the I-effect circulating pump is connected with a high-pressure pump of the powder spraying drying device, and a steam inlet of the I-effect heater is connected with the steam generating device.
3. The system for concentrating monoammonium phosphate powder according to claim 1 wherein the steam generating device comprises a desalted water preparation structure, a desalted water storage tank, a deaerator and a boiler which are sequentially connected, wherein the liquid outlet of the second gas-liquid separator is connected with the desalted water storage tank, and the boiler is connected with the steam inlet of the i-effect heater.
4. The concentration system of powdery monoammonium phosphate according to claim 1, wherein a circulating water tank is arranged right below the cooling tower, and a water supplementing port of the circulating water tank is connected with a process water tank; the cold water inlet of the condenser is connected with the circulating water tank, the hot water outlet of the condenser is connected with the cold water tower, the steam inlet of the condenser is connected with the II-effect flash chamber, and the condensed water outlet of the condenser is connected with the hot water storage tank.
5. The system for concentrating monoammonium phosphate powder according to claim 4 wherein the hot water storage tank is connected with a hot water inlet of an ammonia heat exchanger and a cold water outlet of the ammonia heat exchanger is connected with a process water tank.
6. The system for concentrating monoammonium phosphate powder according to claim 2 wherein the powder spray drying device comprises a high-pressure pump, a powder spray drying tower, an air heat exchanger and a condensate tank, wherein the high-pressure pump is connected with a feed inlet of the powder spray drying tower; the hot air outlet of the air heat exchanger is connected with the hot air inlet of the powder spraying drying tower, and the condensed water outlet of the air heat exchanger is connected with the condensed water tank; the condensed water tank is connected with the machine sealing water tank.
7. The system for concentrating monoammonium phosphate powder according to claim 5 wherein the ammonia gas heat exchanger is connected with an ammonia gas inlet of a reactor, and the reactor and a circulating pump form a circulating structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323197659.4U CN221309553U (en) | 2023-11-27 | 2023-11-27 | Powdery monoammonium phosphate concentration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323197659.4U CN221309553U (en) | 2023-11-27 | 2023-11-27 | Powdery monoammonium phosphate concentration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221309553U true CN221309553U (en) | 2024-07-12 |
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ID=91807171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323197659.4U Active CN221309553U (en) | 2023-11-27 | 2023-11-27 | Powdery monoammonium phosphate concentration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221309553U (en) |
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2023
- 2023-11-27 CN CN202323197659.4U patent/CN221309553U/en active Active
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