Crystallization separator for sodium chloride strong brine in coal chemical industry

Abstract

The utility model belongs to the technical field of crystallization separators, and particularly relates to a crystallization separator for sodium chloride strong brine in the coal chemical industry. According to the utility model, the scraper is arranged in the crystallization separator, so that when the crystallization separator operates, the scraper rotates in the crystallization separator under the driving of the driving device, salt adhered to the inner wall of the crystallization separator is scraped in time, and a thick salt layer is prevented from being formed on the inner wall of the crystallization separator; and the blockage of an outlet below the crystallization separator caused by sudden falling of the salt layer from the inner wall is also avoided, so that the long-time operation of the crystallization separator is ensured, and the maintenance frequency is reduced. In addition, the operation time of the crystallization separator is prolonged, the maintenance frequency is reduced, the maintenance frequency for discharging a large amount of strong brine in the crystallization separator is reduced, the maintenance labor intensity is reduced, and the problem that a large amount of strong brine in the separator has no place to discharge is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of crystallization separators, in particular to a crystallization separator for sodium chloride concentrated brine in coal chemical industry. Background Art

[0002] The production and operation of coal chemical enterprises consume a large amount of water. In order to save water, enterprises obtain recycled water by treating the wastewater discharged from circulating water devices, desalted water, and recycled water after sewage treatment through methods such as COD degradation, hardness removal, filtration, and reverse osmosis. The recycled water is then sent to the production equipment again, thereby reducing the company's water consumption.

[0003] However, while producing recycled water, the company also produces a part of sodium chloride brine. This part of sodium chloride brine is pretreated to separate the sodium chloride in the brine. The crystallizer is an important equipment for the concentration and crystallization of sodium chloride brine. By introducing steam into the crystallizer and vacuumizing it, the water in the brine is further evaporated and concentrated and crystallized. However, as the operation time of the crystallizer increases, a thick layer of sodium chloride salt will crystallize and adhere to the inner wall of the crystallizer. The longer the operation time, the thicker the salt layer, which causes the crystallizer to be unable to continue to operate. Under normal circumstances, the crystallizer will run for about 20 days, and a 20cm salt layer will crystallize and adhere to the inner wall. When the salt layer adheres to a certain thickness, the crystallizer must be stopped for cleaning, and each layer of cleaning takes about 2 days. Due to the huge size of the crystallizer, there is a large amount of sodium chloride brine inside that has nowhere to be discharged, which makes the cleaning work difficult. What's more, when the crystallizer is operating normally, the salt layer suddenly falls off from the inner wall, causing the outlet below the crystallizer to be blocked, and the crystallized brine cannot flow out, and the evaporation crystallization device has to be stopped urgently. Utility Model Content

[0004] Based on the existing technical problems, the utility model provides a crystallization separator for sodium chloride concentrated brine in coal chemical industry, which can effectively prevent the sodium chloride salt layer from adhering to the inner wall of the crystallization separator. The crystallization separator can operate for a long time, and the failure rate of the salt layer adhering to the inner wall is greatly reduced, and the maintenance frequency and maintenance intensity are also reduced.

[0005] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0006] A coal chemical sodium chloride concentrated brine crystallization separator comprises a shell and a driving device, wherein the upper half of the shell is a cylindrical structure, and the lower half is a conical structure; a water vapor outlet and a rotating shaft opening are arranged at the upper part of the shell, and a concentrated brine inlet is arranged at the side; the driving device comprises a motor and a reducer, and the driving device is arranged at the middle position of the upper part of the shell, the rotating shaft of the reducer is connected to a scraper frame arranged inside the shell through the rotating shaft opening, a scraper is arranged on the scraper frame, and the blade of the scraper is closely attached to the inner wall of the shell or the blade is arranged 1 cm to 5 cm away from the inner wall of the shell; a circulating liquid inlet, a circulating liquid outlet and a crystallized brine outlet are arranged on the conical structure of the shell.

[0007] Furthermore, the scraper holder is an inverted L-shaped structure or an N-shaped structure or a disc-shaped structure with a plurality of scrapers.

[0008] Furthermore, a circulating liquid inlet extension device is arranged inside the shell to extend the circulating liquid inlet into the cylindrical structure of the shell.

[0009] Furthermore, a defoaming agent inlet is also arranged on the upper part of the shell, and the defoaming agent inlet is connected to a shower head arranged inside the shell.

[0010] Furthermore, the scraper comprises a blade and a blade body, a plurality of blade handles are arranged on the blade body, a blade handle sleeve cooperating with the blade handle is arranged on the scraper frame, and a spring is arranged in the blade handle sleeve.

[0011] Furthermore, the blade is a rubber blade, a plastic blade, or a hard metal blade. Beneficial Effects

[0012] 1. The utility model arranges a scraper inside the crystal separator. When the crystal separator is running, the scraper is driven by a driving device and rotates inside the crystal separator to scrape off the salt adhering to the inner wall of the crystal separator in time, thereby avoiding the formation of a thick salt layer on the inner wall of the crystal separator and avoiding the blockage of the outlet below the crystal separator caused by the salt layer suddenly falling off the inner wall, thereby ensuring the long-term operation of the crystal separator and reducing the maintenance frequency.

[0013] 2. The operation time of the crystal separator of the utility model is prolonged, and the maintenance frequency is reduced. The frequency of discharging a large amount of concentrated brine inside the crystal separator during maintenance is reduced, which reduces the labor intensity of maintenance and solves the problem that there is nowhere to discharge a large amount of concentrated brine inside the separator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the crystal separator of the utility model with an inverted L-shaped scraper frame;

[0015] Figure 2 This is a schematic diagram of the structure of the crystal separator of the n-shaped scraper frame of the utility model;

[0016] Figure 3 It is a three-dimensional structural schematic diagram of the scraper of the utility model;

[0017] Figure 4 It is a partially cutaway three-dimensional structural schematic diagram of the scraper of the utility model being arranged on an inverted L-shaped scraper holder;

[0018] Figure 5 It is a schematic diagram of a partially cutaway three-dimensional structure of a scraper of the utility model arranged on an n-shaped scraper holder;

[0019] Figure 6 This is a three-dimensional structural schematic diagram of the scraper frame of the utility model having a disc-shaped structure;

[0020] In the figure: 1-shell; 2-concentrated brine inlet; 3-circulating liquid outlet; 4-crystallized brine outlet; 5-circulating liquid inlet; 6-water vapor outlet; 7-reducer; 8-motor; 9-defoaming agent inlet; 10-scraper holder; 11-circulating liquid inlet extension device; 12-handle; 13-rotating shaft a; 14-scraper; 15-handle sleeve; 16-spring. DETAILED DESCRIPTION Example 1

[0021] Reference Figure 1 , Figure 3 and Figure 4In order to ensure the long-term operation of the sodium chloride concentrated brine crystallizer separator and ensure the long-term stable operation of the enterprise's production, the failure rate and maintenance intensity of the crystallizer separator are reduced. The utility model provides a coal chemical sodium chloride concentrated brine crystal separator, comprising a shell 1 and a driving device, wherein the upper half of the shell 1 is a cylindrical structure, and the lower half is a conical structure; a water vapor outlet 6 and a rotating shaft opening are arranged at the upper part of the shell 1, and a concentrated brine inlet 2 is arranged at the side; a defoamer inlet 9 is also arranged at the upper part of the shell 1, and the defoamer inlet 9 is connected to a shower arranged inside the shell 1, and the defoamer is added from the upper part of the crystal separator to eliminate the foam formed in the crystal separator; the driving device comprises a motor 8 and a reducer 7, and the driving device is arranged at the middle position of the upper part of the shell 1, and the rotating shaft of the reducer 7 is connected to the rotating shaft a13 on the scraper frame 10 arranged inside the shell 1 through the rotating shaft opening, and the scraper frame 10 is an inverted L-shaped structure, and a scraper 14 is arranged on the scraper frame 10, and the scraper 14 comprises a blade and a blade body, and the blade is a rubber scraper blade, and the rubber blade has a certain hardness , to prevent the rubber from being too soft to scrape salt; the blade is fixed to the blade by bolts, and a plurality of handles 12 are arranged on the end of the blade away from the blade, and a handle sleeve 15 cooperating with the handle 12 is arranged on the scraper frame 10, and a spring 16 is arranged in the handle sleeve 15, so that the handle 12 can move in the handle sleeve 15, and under the action of the spring 16, the blade can rotate close to the inner wall of the cylindrical shell 1; a circulating liquid inlet 5, a circulating liquid outlet 3 and a crystallized salt water outlet 4 are arranged on the conical structure of the shell 1, and a circulating liquid inlet extension device 11 is arranged inside the shell 1, which extends the circulating liquid inlet 5 to the cylindrical structure of the shell 1, so that the circulating liquid is forced to circulate into the cylindrical structure of the shell 1 through the pump, so as to avoid disturbing the crystallized salt in the conical structure of the shell 1; in order to be able to see the internal crystallization of the crystallizer, observation mirrors are arranged on the upper cylindrical shell of the shell 1 and the lower conical structure shell. Example 2

[0022] Reference Figure 2 , Figure 3 and Figure 5, in order to ensure the long-term operation of the sodium chloride concentrated brine crystallization separator, ensure the long-term stable operation of the enterprise's production, and reduce the failure rate and maintenance intensity of the crystallization separator. The utility model provides a coal chemical sodium chloride concentrated brine crystallization separator, including a shell 1 and a driving device. The upper half of the shell 1 is a cylindrical structure, and the lower half is a conical structure; the upper part of the shell 1 is provided with a water vapor outlet 6 and a rotating shaft opening, and the side is provided with a concentrated brine inlet 2; the upper part of the shell 1 is also provided with a defoamer inlet 9, and the defoamer inlet 9 is connected to the shower head arranged inside the shell 1, and the defoamer is added from the upper part of the crystallization separator to eliminate the foam formed in the crystallization separator; the driving device includes a motor 8 and a reducer 7, and the driving device is arranged in the middle position of the upper part of the shell 1. The rotating shaft of the reducer 7 is connected to the rotating shaft a13 on the scraper frame 10 arranged inside the shell 1 through the rotating shaft opening. The scraper frame 10 is an n-shaped structure, and a scraper 14 is arranged on the scraper frame 10. The scraper 14 includes a blade and a blade body. The blade is a plastic scraper blade, and the plastic blade has a certain hardness. To prevent the plastic from being too soft and failing to scrape salt; the blade is fixed to the blade body by bolts, and a plurality of handles 12 are arranged on the end of the blade body away from the blade, and a handle sleeve 15 cooperating with the handle 12 is arranged on the scraper frame 10, and a spring 16 is arranged in the handle sleeve 15, so that the handle 12 can move in the handle sleeve 15, and under the action of the spring 16, the blade can rotate close to the inner wall of the cylindrical shell 1; a circulating liquid inlet 5, a circulating liquid outlet 3 and a crystallized salt water outlet 4 are arranged on the conical structure of the shell 1, and a circulating liquid inlet extension device 11 is arranged inside the shell 1, which extends the circulating liquid inlet 5 to the cylindrical structure of the shell 1, so that the circulating liquid is forced to circulate into the cylindrical structure of the shell 1 through a pump, so as to avoid disturbing the crystallized salt in the conical structure of the shell 1; in order to be able to see the internal crystallization of the crystallizer, observation mirrors are arranged on the upper cylindrical shell of the shell 1 and the lower conical structure shell. Example 3

[0023] Reference Figure 2 , Figure 3 and Figure 6, in order to ensure the long-term operation of the sodium chloride concentrated brine crystallizer, ensure the long-term stable operation of the enterprise's production, and reduce the failure rate and maintenance intensity of the crystallizer. The utility model provides a coal chemical sodium chloride concentrated brine crystallizer, including a shell 1 and a drive device. The upper half of the shell 1 is a cylindrical structure, and the lower half is a conical structure; the upper part of the shell 1 is provided with a water vapor outlet 6 and a rotating shaft opening, and the side is provided with a concentrated brine inlet 2; the upper part of the shell 1 is also provided with a defoamer inlet 9, and the defoamer inlet 9 is connected to the shower head arranged inside the shell 1, and the defoamer is added from the upper part of the crystallizer to eliminate the foam formed in the crystallizer; the drive device includes a motor 8 and a reducer 7, and the drive device is arranged in the middle position of the upper part of the shell 1. The rotating shaft of the reducer 7 is connected to the rotating shaft a13 on the scraper frame 10 arranged inside the shell 1 through the rotating shaft opening. The scraper frame 10 is a disc-shaped structure, and a plurality of scrapers are arranged on the lower peripheral frame of the disc-shaped scraper frame 10. The scraper 14 includes a blade and a blade, wherein the blade is a hard metal blade with a certain hardness, such as a carbon steel blade or a stainless steel blade, the blade is fixed to the blade by bolts, and a plurality of handles 12 are arranged on the end of the blade away from the blade, and the handles are bolted or welded to the scraper frame, so that the distance between the blade and the inner wall of the shell 1 is 1 cm to 5 cm, so that the blade can rotate in the shell 1; a circulating liquid inlet 5, a circulating liquid outlet 3 and a crystallized brine outlet 4 are arranged on the conical structure of the shell 1, and a circulating liquid inlet extension device 11 is arranged inside the shell 1, which extends the circulating liquid inlet 5 to the cylindrical structure of the shell 1, so that the circulating liquid is forced to circulate into the cylindrical structure of the shell 1 through a pump, so as to avoid disturbing the crystallized salt in the conical structure of the shell 1; in order to be able to see the internal crystallization of the crystallizer, observation mirrors are arranged on the upper cylindrical shell of the shell 1 and the lower conical structure shell.

[0024] Working principle of the utility model: During the operation of the crystallizer, a thick layer of salt will adhere to the inner wall, which will affect the long-term safe and stable operation of the device, and the device has to be stopped for cleaning. In order to avoid the adhesion of the salt layer on the inner wall of the crystallizer, the utility model arranges a scraper inside the crystallizer. When the crystallizer is running, the scraper rotates inside the crystallizer under the drive of the driving device, and the salt adhered to the inner wall of the crystallizer is scraped off in time, avoiding the formation of a thick salt layer on the inner wall of the crystallizer, and also avoiding the salt layer suddenly falling off the inner wall and causing the outlet below the crystallizer to be blocked, thereby ensuring the long-term operation of the crystallizer, reducing the maintenance frequency, and ensuring the long-term operation of production.

[0025] Modifications and changes to the invention made by those familiar with the present invention are all within the patent scope of the present invention, and are not limited to those described in the embodiments.

Claims

1. A crystallization separator for sodium chloride concentrated brine in coal chemical industry, characterized by: It comprises a shell and a driving device, wherein the upper half of the shell is a cylindrical structure, and the lower half is a conical structure; a water vapor outlet and a rotating shaft opening are arranged on the upper part of the shell, and a concentrated brine inlet is arranged on the side; the driving device comprises a motor and a reducer, and the driving device is arranged in the middle position of the upper part of the shell, and the rotating shaft of the reducer is connected to a scraper frame arranged inside the shell through the rotating shaft opening, and a scraper is arranged on the scraper frame, and the blade of the scraper is closely attached to the inner wall of the shell or the blade is arranged at a distance of 1 cm to 5 cm from the inner wall of the shell; a circulating liquid inlet, a circulating liquid outlet and a crystallized brine outlet are arranged on the conical structure of the shell.

2. A crystallization separator for sodium chloride concentrated brine in coal chemical industry according to claim 1, characterized in that: The scraper frame is an inverted L-shaped structure or an N-shaped structure or a disc-shaped structure with a plurality of scrapers.

3. A crystallization separator for sodium chloride concentrated brine in coal chemical industry according to claim 1, characterized in that: A circulating liquid inlet extension device is arranged inside the shell to extend the circulating liquid inlet into the cylindrical structure of the shell.

4. A crystallization separator for sodium chloride concentrated brine in coal chemical industry according to claim 1, characterized in that: A defoaming agent inlet is also arranged on the upper part of the shell, and the defoaming agent inlet is connected to a shower head arranged inside the shell.

5. A crystallization separator for sodium chloride concentrated brine in coal chemical industry according to claim 1, characterized in that: The scraper comprises a blade and a blade body, a plurality of blade handles are arranged on the blade body, a blade handle sleeve cooperating with the blade handle is arranged on the scraper frame, and a spring is arranged in the blade handle sleeve.

6. A coal chemical sodium chloride concentrated brine crystal separator according to claim 5, characterized in that: The blade is a rubber blade, a plastic blade or a hard metal blade.

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