CN214971880U - Plate-type clear liquid circulating evaporation crystallization device - Google Patents
Plate-type clear liquid circulating evaporation crystallization device Download PDFInfo
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- CN214971880U CN214971880U CN202121356096.7U CN202121356096U CN214971880U CN 214971880 U CN214971880 U CN 214971880U CN 202121356096 U CN202121356096 U CN 202121356096U CN 214971880 U CN214971880 U CN 214971880U
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Abstract
A plate-type clear liquid circulating evaporation crystallization device comprises a forced plate-type evaporator, an axial flow pump, a crystallizer, a discharge pump, a steam compressor and a cooling crystallizer, wherein a first material outlet of the crystallizer is connected with one end of a clear liquid circulating pipe, one end of the clear liquid circulating pipe is arranged at the liquid level inside the crystallizer, and the other end of the clear liquid circulating pipe is connected with a feeding hole of the axial flow pump. The utility model discloses utilize the position of clear liquid circulating pipe in the crystallizer to get the clear liquid circulation, adopt the clear liquid circulation, avoid high solid-to-liquid ratio material to get into in forcing plate evaporator, salt is to the wearing and tearing of slab in the reduction material, increases plate-type evaporation life. The high solid-liquid ratio material can influence heat transfer, and the K value is reduced, so that the high solid-liquid ratio material is prevented from entering, and the heat transfer efficiency of the system is also improved.
Description
Technical Field
The utility model relates to a physics field especially relates to evaporation crystallization technique, particularly a board-like clear solution circulation evaporation crystallization device.
Background
The crystallizer is a crystallization device used in evaporative crystallization, and is widely used in various industries, such as the fields of food, medicine, chemical industry, zero discharge of waste water and the like, and the evaporation crystallization is completed by mostly adopting a tube forced circulation heater to match with the crystallization device in the industries for a long time, but the following problems exist in the operation process of the system:
1. considering the flow rate of the axial flow pump and the heating time, a heating pipe with the length of 6-9 meters is adopted, so that the height of the whole crystallization device exceeds 15 meters, even 20 meters, the temperature loss of a heater is increased, the area of a heat exchanger is increased, and the platform of equipment is increased.
2. The FC crystallization of the crystallizer (such as FC crystallization) does not have too long crystallization sections, so that the position of a material outlet is relatively close to that of a material inlet, and the evaporation is easily influenced by the phenomenon of thermal short circuit in the system operation process.
3. The solid-liquid ratio of discharged materials cannot be controlled in the material taking process at the bottom of a crystallizer (such as FC crystallization), so that the salt content in discharged materials is higher, the abrasion coefficient of a circulating pump is increased, and the service life of the circulating pump is shortened.
Disclosure of Invention
An object of the utility model is to provide a board-like clear solution circulation evaporation crystallization device, this kind of board-like clear solution circulation evaporation crystallization device solve among the prior art evaporation crystallization device and appear hot short-circuit phenomenon, the shorter technical problem of life-span easily.
The utility model relates to a plate-type clear liquid circulation evaporation crystallization device, which comprises a forced plate-type evaporator, an axial-flow pump, a crystallizer, a discharge pump, a steam compressor and a cooling crystallizer, wherein a first material outlet of the crystallizer is connected with a clear liquid circulation pipe, one end of the clear liquid circulation pipe is arranged at the liquid level inside the crystallizer, the other end of the clear liquid circulation pipe is connected with a feed inlet of the axial-flow pump, a discharge outlet of the axial-flow pump is connected with a feed inlet of the forced plate-type evaporator through a feed pipe of the plate-type evaporator, a discharge outlet of the forced plate-type evaporator is connected with the feed inlet of the crystallizer through a pipeline, a second material outlet of the crystallizer is connected with the feed inlet of the discharge pump through a pipeline, a discharge outlet of the discharge pump is connected with the feed inlet of the cooling crystallizer through a pipeline, a cooling water inlet of the cooling crystallizer is connected with a cooling water inlet pipeline, and a cooling water outlet of the cooling crystallizer is connected with a cooling water outlet pipeline, the steam outlet of the crystallizer is connected with the steam inlet of a steam compressor through a steam pipeline, and the steam outlet of the steam compressor is connected with the steam inlet of the forced plate-type evaporator through a secondary steam pipeline.
Further, the crystallizer adopts an FC crystallizer.
Compared with the prior art, the utility model, its effect is positive and obvious. The utility model discloses a plate-type clear solution circulation evaporation crystallization device's plate-type evaporation is highly lower, effectively reduces crystallization device's total height to reduce the system heat loss, practice thrift the energy consumption. The material inlet of the axial flow pump and the material outlet of the crystallizer are separated by a clear liquid circulating pipe, so that the phenomenon of thermal short circuit is effectively avoided. The position of the clear liquid circulating pipe in the crystallizer is utilized to take clear liquid for circulation, clear liquid circulation is adopted, the situation that materials with high solid-liquid ratio, namely large particles, enter the forced plate-type evaporator is avoided, the heat transfer efficiency of the system is increased, the abrasion of salt in the materials to the circulating pump is reduced, and the service life of the circulating pump is prolonged. The secondary steam in the crystallizer enters the steam compressor, works through the secondary steam, improves the temperature of the secondary steam, is connected to the steam inlet of the plate-type evaporator after being heated, completes the material circulation and heat circulation processes, and the plate-type clear liquid circulation evaporation cold crystallization device reduces the height of equipment, reduces the operation cost of a system and improves the efficiency of the system.
Drawings
Fig. 1 is a schematic structural diagram of a plate-type clear liquid circulating evaporation crystallization device of the present invention.
Fig. 2 is a schematic front view of a forced plate evaporator in a plate-type clear liquid circulation evaporation crystallization device according to the present invention.
Fig. 3 is a schematic side view of a forced plate evaporator in a plate-type clear liquid circulation evaporation crystallization device according to the present invention.
Detailed Description
Example 1
The present invention will be further described with reference to the accompanying drawings and embodiments, but the present invention is not limited to this embodiment, and the protection scope of the present invention should be included in all similar structures and similar variations thereof.
As shown in fig. 1, fig. 2 and fig. 3, the plate-type clear liquid circulation evaporation crystallization device of the present invention comprises a forced plate-type evaporator 1, an axial flow pump 2, a crystallizer 3, a discharge pump 8, a vapor compressor 4 and a cooling crystallizer 5, wherein a first material outlet of the crystallizer 3 is connected with a clear liquid circulation pipe 9, one end of the clear liquid circulation pipe 9 is arranged at the liquid level inside the crystallizer 3, the other end of the clear liquid circulation pipe 9 is connected with a feed inlet of the axial flow pump 2, a discharge outlet of the axial flow pump 2 is connected with a feed inlet of the forced plate-type evaporator 1 through a plate-type evaporator feed pipe 10, a discharge outlet of the forced plate-type evaporator 1 is connected with the feed inlet of the crystallizer 3 through a pipeline, a second material outlet of the crystallizer 3 is connected with the feed inlet of the discharge pump 8 through a pipeline, a discharge outlet of the discharge pump 8 is connected with the feed inlet of the cooling crystallizer 5 through a pipeline, the cooling water inlet of the cooling crystallizer 5 is connected with a circulating cooling water inlet pipeline 7, the cooling water outlet of the cooling crystallizer 5 is connected with a circulating cooling water outlet pipeline 6, the steam outlet of the crystallizer 3 is connected with the steam inlet of the steam compressor 4 through a steam pipeline, and the steam outlet of the steam compressor 4 is connected with the steam inlet of the forced plate-type evaporator 1 through a secondary steam pipeline 11.
Further, the crystallizer 3 is an FC crystallizer.
Specifically, the forced plate evaporator 1, the axial flow pump 2, the crystallizer 3, the discharge pump 8, the vapor compressor 4, the cooling crystallizer 5, the FC crystallizer, and the like in this embodiment all adopt known solutions in the prior art, and those skilled in the art are aware of them, and are not described herein again.
The secondary steam in the crystallizer 3 enters a steam compressor 4, the temperature of the secondary steam is increased by applying work to the secondary steam, and the secondary steam after temperature rise is connected to a steam inlet of the forced plate-type evaporator 1 to finish the material circulation and heat circulation processes.
Material flow:
1. because one end of the clear liquid circulating pipe 9 is arranged at the liquid level inside the crystallizer 3, clear liquid can be taken from the liquid level by the clear liquid circulating pipe 9 and enters the axial flow pump 2, as shown in fig. 1, the material inlet of the axial flow pump 2 is separated from the material outlet of the crystallizer 3 by the clear liquid circulating pipe 9, and thus, the thermal short circuit phenomenon is effectively avoided.
2. Clear liquid circulation pipe 9 gets the clear liquid circulation from crystallizer 3 liquid level, adopts clear liquid circulation, avoids in the high solid-liquid ratio material is the large granule gets into forcing plate evaporator 1, increases system heat transfer efficiency, has reduced the salt in the material and has abraded the circulating pump, increases circulating pump life. The high solid-liquid ratio material can influence heat transfer, and the K value is reduced, so that the high solid-liquid ratio material is prevented from entering, and the heat transfer efficiency of the system is also improved.
3. Clear liquid enters the forced plate evaporator 1 through the axial flow pump 2, and materials are not evaporated in the forced plate evaporator 1 but completed in the FC crystallizer because the plate evaporator adopts a forced circulation process, so that the worry of blocking plates is avoided.
4. The secondary steam evaporated by the crystallizer 3 enters the steam compressor 4, the steam compressor 4 applies work to the secondary steam, the temperature of the secondary steam is increased, and the secondary steam with the increased temperature enters the forced plate-type evaporator 1, so that heat balance is completed.
5. When the material concentration of the crystallizer 3 reaches a set value, the material is conveyed to the cooling crystallizer 5 through the discharging pump 8, and the crystallization process is completed.
6. The plate-type evaporator is adopted to replace a tube-array evaporator, and according to the structural characteristics of the plate-type evaporator, the height of the plate-type evaporator is lower, so that the total height of the crystallizing device is effectively reduced, the heat loss of a system is reduced, and the energy consumption is saved.
7. The turbulent flow state of the feed liquid in the plate-type evaporator is good, the Reynolds coefficient is high, the heat transfer coefficient is high, and the heat exchange area is small.
As can be seen from fig. 1 and 2, the raw material enters the forced plate evaporator 1 from the inlet of the forced plate evaporator 1, and enters the crystallizer 3 from the outlet of the forced plate evaporator 1.
The utility model provides an utilize board-like evaporimeter and crystallization to combine together a board-like clear liquid circulation evaporation crystallization device of full novelty, in whole crystallization process, utilize the position of clear liquid circulating pipe 9 in the crystallizer 3 to get the clear liquid circulation, adopt the clear liquid circulation, avoid high solid-liquid ratio material large granule promptly to get into in forcing board-like evaporimeter 1, increase system heat transfer efficiency has reduced salt in the material and has worn and torn the circulating pump, increases circulating pump life. The secondary steam in the crystallizer 3 enters the steam compressor 4, the temperature of the secondary steam is increased by working on the secondary steam, and the secondary steam after temperature rise is connected to a steam inlet of the plate-type evaporator to finish the material circulation and heat circulation processes. The plate-type clear liquid circulating evaporation cold crystallization device reduces the height of equipment, reduces the running cost of a system and improves the efficiency of the system.
Claims (2)
1. A plate-type clear liquid circulating evaporation crystallization device is characterized in that: comprises a forced plate-type evaporator (1), an axial-flow pump (2), a crystallizer (3), a discharge pump (8), a vapor compressor (4) and a cooling crystallizer (5), wherein a first material outlet of the crystallizer (3) is connected with a clear liquid circulating pipe (9), one end of the clear liquid circulating pipe (9) is arranged at the liquid level inside the crystallizer (3), the other end of the clear liquid circulating pipe (9) is connected with a feed inlet of the axial-flow pump (2), a discharge outlet of the axial-flow pump (2) is connected with a feed inlet of the forced plate-type evaporator (1) through a plate-type evaporator feed pipe (10), a discharge outlet of the forced plate-type evaporator (1) is connected with a feed inlet of the crystallizer (3) through a pipeline, a second material outlet of the crystallizer (3) is connected with a feed inlet of the discharge pump (8) through a pipeline, a discharge outlet of the discharge pump (8) is connected with a feed inlet of the cooling crystallizer (5) through a pipeline, a cooling water inlet of the cooling crystallizer (5) is connected with a circulating cooling water inlet pipeline (7), a cooling water outlet of the cooling crystallizer (5) is connected with a circulating cooling water outlet pipeline (6), a steam outlet of the crystallizer (3) is connected with a steam inlet of the steam compressor (4) through a steam pipeline, and a steam outlet of the steam compressor (4) is connected with a steam inlet of the forced plate-type evaporator (1) through a secondary steam pipeline (11).
2. The plate-type clear liquid circulating evaporative crystallization device according to claim 1, wherein: the crystallizer (3) adopts an FC crystallizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121356096.7U CN214971880U (en) | 2021-06-18 | 2021-06-18 | Plate-type clear liquid circulating evaporation crystallization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121356096.7U CN214971880U (en) | 2021-06-18 | 2021-06-18 | Plate-type clear liquid circulating evaporation crystallization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214971880U true CN214971880U (en) | 2021-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121356096.7U Active CN214971880U (en) | 2021-06-18 | 2021-06-18 | Plate-type clear liquid circulating evaporation crystallization device |
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| CN (1) | CN214971880U (en) |
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2021
- 2021-06-18 CN CN202121356096.7U patent/CN214971880U/en active Active
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