CN214050520U - Ammonium chloride salt thick liquid cooling crystallization device - Google Patents
Ammonium chloride salt thick liquid cooling crystallization device Download PDFInfo
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- CN214050520U CN214050520U CN202022665540.5U CN202022665540U CN214050520U CN 214050520 U CN214050520 U CN 214050520U CN 202022665540 U CN202022665540 U CN 202022665540U CN 214050520 U CN214050520 U CN 214050520U
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- cooling crystallization
- crystallization kettle
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- ammonium chloride
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Abstract
A cooling crystallization device for ammonium chloride salt slurry comprises a stirring motor arranged above a vacuum cooling crystallization kettle, wherein the output end of the stirring motor is connected with one end of a stirring shaft, the stirring motor is hermetically connected with the vacuum cooling crystallization kettle, a liquid inlet guide pipe and a vacuum pump are further arranged on the vacuum cooling crystallization kettle, the vacuum cooling crystallization kettle is provided with a first blanking valve and a second blanking valve, a recoil valve is arranged between the first blanking valve and the second blanking valve, and the second blanking valve is connected with a discharging pump through a pipeline; the normal temperature cooling crystallization kettle is provided with a water cooling jacket, a motor is arranged on the normal temperature cooling crystallization kettle, the output end of the motor is connected with one end of a frame type stirring shaft, a feeding guide pipe is arranged on the normal temperature cooling crystallization kettle and is connected with a normal temperature blanking valve, and the normal temperature blanking valve is connected with a centrifuge through a pipeline; the discharge pump is connected with the feeding conduit through a conveying pipeline, the conveying pipeline is provided with a pressure sensor, a densimeter, a flowmeter and a discharge valve, and a pipeline with a reflux valve is arranged between the conveying pipeline and the vacuum cooling crystallization kettle.
Description
Technical Field
The utility model relates to a chemical purification technology, in particular to an ammonium chloride salt slurry cooling and crystallizing device.
Background
The traditional ammonium chloride evaporation crystallization technology adopts a three-effect falling film evaporator and a cooling crystallizer. The method comprises the steps of firstly carrying out countercurrent evaporation concentration on a dilute solution in an evaporator until the dilute solution is saturated, then cooling the dilute solution in a cooling crystallizer to about 40 ℃ for crystallization, and returning the centrifugally separated mother liquor to the evaporator for continuous evaporation. The adopted process technology is 'intermittent kettle type cooling crystallization', and the existing improved technology is 'continuous kettle type cooling crystallization' and has the following technical defects: 1) large occupied area and low cooling speed: because the cooling kettles are generally made of enamel and have low heat transfer coefficient, only the cooling kettles can be cooled by a jacket, a plurality of cooling kettles (generally 5) are needed to finish cooling crystallization, and the cooling kettles cannot be normally arranged and used in the places with limited site specifications; 2) the blanking is blocked frequently, the operation is complex, the labor intensity is large: because the number of the cooling kettles is large, the time required for each kettle to reach the end point cooling temperature is long, salt blocks deposited at the bottom of the kettle block a blanking valve, the salt blocks are dredged by hot water recoil before blanking, normal blanking can be realized, when a plurality of cooling kettles are switched for use, operation errors are easy to occur, continuous production is delayed, and economic losses are caused; 3) the product yield is low: because hot water is needed for backflushing before blanking, the concentration of salt slurry is reduced, the temperature is increased, the solubility is increased, a part of ammonium chloride is dissolved, and the yield of the product is reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the aim at of this application provides a novel ammonium chloride salt thick liquid cooling crystallization device, and the device not only takes up an area of for a short time when cooling ammonium chloride salt thick liquid crystallization, and cooling rate is fast, and the unloading can not block up, and the product yield is high.
According to an aspect of the present application, in order to achieve the above technical effects, the present application provides the following technical solutions:
design a novel ammonium chloride salt thick liquid cooling crystallization device, include: a vacuum cooling crystallization kettle and a normal temperature cooling crystallization kettle; a stirring motor is arranged above the vacuum cooling crystallization kettle, the output end of the stirring motor is connected with one end of a stirring shaft, the stirring motor is hermetically connected with the vacuum cooling crystallization kettle, a liquid inlet guide pipe and a vacuum pump are also arranged on the vacuum cooling crystallization kettle, a first blanking valve and a second blanking valve are connected below the vacuum cooling crystallization kettle, a recoil valve is arranged between the first blanking valve and the second blanking valve, and the second blanking valve is connected with a discharging pump through a pipeline; a water cooling jacket is arranged at the periphery of the normal temperature cooling crystallization kettle, a motor is arranged above the normal temperature cooling crystallization kettle, the output end of the motor is connected with one end of a frame type stirring shaft, a feeding guide pipe is arranged on the normal temperature cooling crystallization kettle, a normal temperature blanking valve is connected below the feeding guide pipe, and the normal temperature blanking valve is connected with a centrifuge through a pipeline; the discharge pump is connected with the feeding conduit through a conveying pipeline, the conveying pipeline is provided with a pressure sensor, a densimeter, a flowmeter and a discharge valve, and a pipeline with a reflux valve is arranged between the conveying pipeline and the vacuum cooling crystallization kettle.
In order to obtain better technical effect, the invention also has the following technical characteristics:
in some embodiments, in order to isolate the interior of the vacuum cooling crystallization kettle from the outside air better, a sealing sleeve double-end-face mechanical seal is arranged between the stirring motor and the vacuum cooling crystallization kettle.
In some embodiments, the feed draft tube extends at least one-half way into the vacuum cooled crystallization vessel. The method aims to avoid the flash evaporation process when the flow is guided to be below the liquid level, reduce entrainment in secondary steam and improve the yield.
In some embodiments, a propeller-type stirring shaft is used, which is intended to stir rapidly to ensure a relatively uniform liquid-solid ratio throughout the tank.
In some embodiments, in order to more accurately grasp and control the temperature in the vacuum cooling crystallization kettle and the normal temperature cooling crystallization kettle, a temperature sensing control device is arranged in each of the vacuum cooling crystallization kettle and the normal temperature cooling crystallization kettle.
In some embodiments, for better monitoring of the normal operation of the device, the pressure sensor, densitometer, flow meter may all be connected to a control device for remote control.
Due to the adoption of the technical scheme, compared with the prior art, the method has the following advantages: 1) continuous feeding and continuous discharging, stable discharging temperature and consistency and low operation intensity; 2) the continuous operation is not easy to block materials; 3) The number of the kettles is reduced, the occupied area is greatly reduced, and the equipment investment is reduced; 4) the total installed power and the energy consumption are reduced; 5) the cooling speed conforms to the crystallization temperature change gradient of the ammonium chloride, and crystals with larger particles can be obtained; 6) the link of hot water dredging is greatly reduced, and the product yield is high.
Drawings
Fig. 1 is a schematic structural diagram of a novel ammonium chloride salt slurry cooling crystallization device of the present application.
Detailed Description
The present application will be described in further detail with reference to examples.
The application discloses novel ammonium chloride salt thick liquid cooling crystallization device includes: a vacuum cooling crystallization kettle 3 and a normal temperature cooling crystallization kettle 12; vacuum cooling crystallization kettle 3 is the enamel kettle, is equipped with temperature-sensing control device in, and its top is provided with agitator motor 31, in order to make in the vacuum cooling crystallization kettle 3 with the better isolated of outside air, for seal cover double mechanical seal between agitator motor 31 and vacuum cooling crystallization kettle 3. The output end of the stirring motor 31 is connected with one end of the stirring shaft 4, and a push type stirring shaft is adopted, the rotating speed is 80r/min, the purpose is to quickly stir, and the solid-liquid ratio of the material in the whole kettle is ensured to be relatively uniform. Still be equipped with feed liquor honeycomb duct 2 and vacuum pump 32 on the vacuum cooling crystallization kettle 3, feed liquor honeycomb duct 2 stretches into the middle part of vacuum cooling crystallization kettle 3 and ensures more than 500mm below the liquid level, and the design is in order to avoid the flash distillation process below water conservancy diversion to the liquid level like this, reduces the mist among the secondary steam and smugglies secretly and improves the yield. The vacuum pump 32 is used for vacuumizing the vacuum cooling crystallization kettle 3, the final temperature of the salt slurry is ensured to be 55-60 ℃, and the vacuum in the kettle is-0.09 Mpa. A first blanking valve 5 and a second blanking valve 7 are connected below the vacuum cooling crystallization kettle 3, a recoil valve 6 is arranged between the first blanking valve 5 and the second blanking valve 7, and the valve bodies 2205/TA2 are both valve bodies, and the alloy is sealed in a hard mode. The second blanking valve 7 is connected with a discharging pump 8 through a pipeline; this discharge pump 8 uses a flow TA2, a mortar pump.
The normal temperature cooling crystallization kettle 12 is an enamel kettle, normal pressure cooling crystallization is carried out, the final temperature of salt slurry is 38-45 ℃, a thermal resistor is configured in the kettle for remote monitoring, a water cooling jacket 14 is arranged on the periphery of the thermal resistor, a motor 121 is arranged above the normal temperature cooling crystallization kettle 12, the output end of the motor 121 is connected with one end of a frame type stirring shaft 13, a feeding conduit 122 is arranged on the normal temperature cooling crystallization kettle 12, a liquid inlet feeding conduit 122 extends into the middle of the normal temperature cooling crystallization kettle 12 and is ensured to be more than 500mm below the liquid level, a normal temperature material valve 15 is connected below the normal temperature cooling crystallization kettle 12, and the normal temperature material valve 15 is connected with a centrifuge through a pipeline.
The discharge pump 8 is connected with the feeding conduit 122 through the conveying pipeline 81, the conveying pipeline 81 is provided with the pressure sensor 9, the densimeter 16, the flowmeter 17 and the discharge valve 11, and for the normal operation of better monitoring equipment, the pressure sensor 9, the densimeter 16 and the flowmeter 17 can be connected with the control device so as to realize remote control. Further, a pipe connection having a reflux valve 10 is provided between the transfer pipe 81 and the vacuum cooling crystallization vessel 3.
The method for cooling ammonium chloride salt slurry crystals by adopting the ammonium chloride salt slurry cooling and crystallizing device comprises the following steps: a. leading the ammonium chloride salt slurry into a vacuum cooling crystallization kettle 3 from a liquid inlet guide pipe 2, guiding the ammonium chloride salt slurry to be below the liquid level, and sealing the liquid inlet guide pipe 2; b. starting a vacuum pump 32 to pump air in the vacuum cooling crystallization kettle 3, and stopping the vacuum pump 32 after a vacuum state is formed in the kettle; c. starting a stirring motor 31 to drive a stirring shaft 4 to quickly stir the ammonium chloride salt slurry in the vacuum cooling crystallization kettle 3, and ensuring that the solid-liquid ratio of the material in the whole kettle is relatively uniform; d. opening a reflux valve 10 and a discharge valve 11, then starting a discharge pump 8 to circulate a part of the slurry back to the vacuum cooling crystallization kettle 3, outputting a part of the slurry to a normal pressure crystallization kettle 12, and monitoring and adjusting the slurry through a densimeter 16 and a flowmeter 17 in the process; e. when the output pressure of the discharge pump 8 is detected to be low, indicating that a pump suction inlet is blocked, and feeding hot water to the first discharge valve 5, the second discharge valve 7 and the recoil valve 6 for dilution recovery; f. when the output pressure of the discharging pump 8 is detected to be higher, the blockage of the outlet of the discharging pump 8 is indicated, and the dilution of hot water fed into the discharging pipeline is recovered; g. filling water into a jacket of the normal pressure cooling crystallization kettle 12 to cool the surface of the normal pressure cooling crystallization kettle 12, and controlling the final temperature of the salt slurry entering the normal pressure cooling crystallization kettle 12 to be 38-45 ℃; h. the salt slurry is finally continuously output to the centrifuge through the normal-temperature blanking valve 15, and the continuous operation of the whole process is realized.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (6)
1. A ammonium chloride salt thick liquid cooling crystallization device which characterized in that includes: a vacuum cooling crystallization kettle (3) and a normal temperature cooling crystallization kettle (12); a stirring motor (31) is arranged above the vacuum cooling crystallization kettle (3), the output end of the stirring motor (31) is connected with one end of a stirring shaft (4), the stirring motor (31) is hermetically connected with the vacuum cooling crystallization kettle (3), a liquid inlet guide pipe (2) and a vacuum pump (32) are further arranged on the vacuum cooling crystallization kettle (3), a first blanking valve (5) and a second blanking valve (7) are connected below the vacuum cooling crystallization kettle (3), a recoil valve (6) is arranged between the first blanking valve (5) and the second blanking valve (7), and the second blanking valve (7) is connected with a discharging pump (8) through a pipeline; a water cooling jacket (14) is arranged on the periphery of the normal-temperature cooling crystallization kettle (12), a motor (121) is arranged above the normal-temperature cooling crystallization kettle (12), the output end of the motor (121) is connected with one end of a frame type stirring shaft (13), a feeding guide pipe (122) is arranged on the normal-temperature cooling crystallization kettle (12), a normal-temperature material valve (15) is connected below the feeding guide pipe, and the normal-temperature material valve (15) is connected with a centrifugal machine through a pipeline; discharge pump (8) be connected through pipeline (81) and feeding pipe (122), pipeline (81) on be provided with pressure sensor (9), densimeter (16), flowmeter (17) and bleeder valve (11), pipeline (81) and vacuum cooling crystallization kettle (3) between be equipped with the pipe connection that has reflux valve (10).
2. The ammonium chloride salt slurry cooling crystallization device of claim 1, wherein a sealing sleeve double-end-face mechanical seal is arranged between the stirring motor (31) and the vacuum cooling crystallization kettle (3).
3. The ammonium chloride salt slurry cooling crystallization device of claim 1, characterized in that the liquid inlet draft tube (2) extends into at least one half of the vacuum cooling crystallization kettle (3).
4. The ammonium chloride salt slurry cooling crystallization device of claim 1, wherein the stirring shaft (4) is a propeller stirring shaft.
5. The ammonium chloride salt slurry cooling crystallization device according to claim 1 or 2 or 3 or 4, characterized in that a temperature-sensing control device is arranged in the vacuum cooling crystallization kettle (3) and the normal temperature cooling crystallization kettle (12).
6. The ammonium chloride salt slurry cooling crystallization device of claim 5, characterized in that the pressure sensor (9), the density meter (16) and the flow meter (17) are all connected with a control device to realize remote control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022665540.5U CN214050520U (en) | 2020-11-18 | 2020-11-18 | Ammonium chloride salt thick liquid cooling crystallization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022665540.5U CN214050520U (en) | 2020-11-18 | 2020-11-18 | Ammonium chloride salt thick liquid cooling crystallization device |
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| Publication Number | Publication Date |
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| CN214050520U true CN214050520U (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022665540.5U Withdrawn - After Issue CN214050520U (en) | 2020-11-18 | 2020-11-18 | Ammonium chloride salt thick liquid cooling crystallization device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112274964A (en) * | 2020-11-18 | 2021-01-29 | 广州市心德实业有限公司 | Ammonium chloride salt slurry cooling crystallization device and cooling crystallization method thereof |
-
2020
- 2020-11-18 CN CN202022665540.5U patent/CN214050520U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112274964A (en) * | 2020-11-18 | 2021-01-29 | 广州市心德实业有限公司 | Ammonium chloride salt slurry cooling crystallization device and cooling crystallization method thereof |
| CN112274964B (en) * | 2020-11-18 | 2023-08-25 | 广州市心德实业有限公司 | Ammonium chloride salt slurry cooling crystallization device and cooling crystallization method thereof |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A cooling crystallization device for ammonium chloride salt slurry Effective date of registration: 20220311 Granted publication date: 20210827 Pledgee: Bank of China Limited by Share Ltd. Guangzhou Panyu branch Pledgor: GUANGZHOU SCHIN-TECH INDUSTRIAL Co.,Ltd. Registration number: Y2022980002459 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210827 Effective date of abandoning: 20230825 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210827 Effective date of abandoning: 20230825 |