CN216259198U

CN216259198U - Flash evaporation crystallizing tank for continuous production

Info

Publication number: CN216259198U
Application number: CN202122756564.6U
Authority: CN
Inventors: 方林; 王明松; 陈太平; 张泳健; 朱志宏
Original assignee: Nanjing Guanshan Chemical Technology Co ltd
Current assignee: Nanjing Guanshan Chemical Technology Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-04-12
Anticipated expiration: 2031-11-11

Abstract

The utility model provides a flash evaporation crystallization tank for continuous production, which comprises a top cover, a cylinder body and a conical bottom, wherein the top cover is welded on the upper end surface of the cylinder body, the conical bottom is fixedly welded on the lower end surface of the cylinder body, when the equipment is operated, heated sulfuric acid-ferrous sulfate raw material liquid enters the tank body from a feed inlet to be flashed to lose part of solvent, solute is crystallized, large-particle crystals which can overcome the rising buoyancy are deposited on the conical bottom and flow out from a second discharge outlet, micro-crystal particles which can not overcome the rising buoyancy flow out from a first discharge outlet along with the rising of the liquid, a small amount of large-particle crystals formed before flowing out of the first discharge outlet are settled into the conical bottom from a baffle notch at the bottom of an inclined baffle, the liquid flowing out of the first discharge outlet is heated and then enters the flash evaporation crystallization tank from the feed inlet, the continuous circulation of the crystallization process is realized, and the continuous circulation of the crystallization process is realized, and the uniformity of the crystal particles is ensured, and the crystal particles are easy to separate and ship.

Description

Flash evaporation crystallizing tank for continuous production

Technical Field

The utility model belongs to the technical field of chemical production equipment, and particularly relates to a flash evaporation crystallizing tank for continuous production.

Background

Crystallization is a common means in the purification and forming processes of products in the chemical production process, and is widely applied to chemical production at present. The industrial crystallization process can be divided into a heating type and a cooling type, the basis of the selection of the crystallization process is mainly the solubility curve and the saturation solubility of a crystal, the solvent is evaporated along with the continuous input of heat in the heating type crystallization process, the concentration of solute is improved, and the crystal is separated out when the concentration is higher than the solubility. However, in chemical production, many products do not completely comply with the ideal state due to the influence of inherent characteristics or impurities and other factors, and the phenomena of uneven grain size, grain agglomeration, wall adhesion and the like occur in the evaporation crystallization process, which affects the product quality and increases the difficulty of solid-liquid separation, so that the production process is difficult to continuously carry out.

SUMMERY OF THE UTILITY MODEL

The present invention aims to provide a flash crystallization tank for continuous production to solve the problems set forth in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a flash distillation crystallizer for continuous production, including the top cap, barrel and awl end, the top cap welding is at the barrel up end, the fixed welding of awl end is terminal surface under the barrel, be equipped with the instrument measurement mouth on the top cap, be equipped with the manhole on the top cap, the instrument measurement mouth, be equipped with the flash distillation vapour outlet on the manhole, be equipped with the feed inlet on the barrel, first discharge gate, barrel inside is equipped with intermediate bottom and baffle respectively, baffle lower extreme and barrel inner wall fixed connection, the baffle slope sets up, the baffle is located first discharge gate one side, and the baffle lower extreme is located first discharge gate lower part, intermediate bottom and barrel inner wall fixed connection, the awl end bottom side is equipped with the second discharge gate.

As a further improvement, the lower end of the baffle is provided with a notch.

As a further improvement, the baffle and the cylinder body form an angle of 45 degrees.

As a further improvement, the upper end face of the middle partition plate is 430-50 cm higher than the feeding hole, and the lower end face of the middle partition plate is 30-50 cm lower than the first discharging hole.

As a further improvement, the barrel is provided with two lifting lugs and two supporting seats.

As a further improvement, an angle of 45 degrees is formed between the middle partition plate and the two lifting lugs.

As a further improvement, the feeding hole is positioned at the position of two thirds of the height of the cylinder relative to the ground, and the first discharging hole is positioned at the position of one third of the height of the cylinder relative to the ground.

As a further improvement, a baffle reinforcing rib is fixedly connected between the baffle and the cylinder body.

As a further improvement, a partition plate reinforcing rib is fixedly connected between the middle partition plate and the inner wall of the cylinder body, and the partition plate reinforcing ribs are positioned on two sides of the middle partition plate.

As a further improvement, the shape of the top cover is oval.

Compared with the prior art, the utility model has the beneficial effects that: in the utility model, the flash evaporation crystallization tank is arranged, so that 33% sulfuric acid-ferrous sulfate raw material liquid heated to 110 ℃ can be continuously crystallized, the continuous circulation of the crystallization process is realized, and the uniform crystal particles are ensured, and the separation and the shipment are easy.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a flash crystallization tank for continuous production according to the present invention;

FIG. 2 is a top view of a flash crystallization tank for continuous production according to the present invention.

In the figure: 1. an instrument measurement port; 2. lifting lugs; 3. an inlet draft tube; 4, a feeding hole; 5. a supporting seat; 6. a second discharge port; 7. a flash steam outlet; 7. a manhole; 9. a middle partition plate; 10. a separator plate reinforcing rib; 11. baffle reinforcing ribs; 12. a first discharge port; 13. a baffle notch; 14. a baffle plate; 15. a top cover; 16. a barrel; 17. a conical bottom.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the utility model and not as limiting the scope of the utility model. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1-2, a flash evaporation crystallizer for continuous production comprises a top cover 15, a cylinder 16 and a cone bottom 17, wherein the top cover 15 is welded on the upper end surface of the cylinder 16, the cone bottom 17 is fixedly welded on the lower end surface of the cylinder 16, the top cover 15 is provided with an instrument measuring port 1, the top cover 15 is provided with a manhole 8 and an instrument measuring port 1, the manhole 8 is provided with a flash evaporation outlet 7, the cylinder 16 is provided with a feed inlet 4 and a first discharge outlet 12, the cylinder 16 is internally provided with a middle partition plate 9 and a baffle plate 14 respectively, the lower end of the baffle plate 14 is fixedly connected with the inner wall of the cylinder 16, the baffle plate 14 is obliquely arranged, the baffle plate 14 is positioned at one side of the first discharge outlet 12, the lower end of the baffle plate 14 is positioned at the lower part of the first discharge outlet 12, the middle partition plate 9 is fixedly connected with the inner wall of the cylinder 16, the bottom side of the cone bottom 17 is provided with a second discharge outlet 6, the feed inlet 4 comprises a flow guide pipe and an inlet pipe, the inlet pipe is positioned inside the cylinder 16, the honeycomb duct is partly located inside barrel 16, partly is located the barrel 16 outside, honeycomb duct and import pipe become 90 degrees angles, the baffle is an oblique baffle, the effect blocks liquid and does not let liquid directly flow in circulation discharge gate, but force liquid to flow from first discharge gate again after turning over from 14 upper portions of baffle, because the great easy deformation of baffle 14 area, it plays the fixed action of enhancement to increase baffle strengthening rib 11 in the design, consequently also call the strengthening rib, the strengthening rib can be used the angle steel, the steel sheet, multiple materials such as steel pipe, one end is fixed on oblique baffle 14, another end is fixed on barrel 16, for making the drawing succinct, only a line has been drawn in the picture, always have some large granule crystals to deposit in the contained angle of baffle 14 and barrel 16 in the production use process, then improved: namely, a baffle notch 13 is arranged at an included angle to lead the precipitated crystal to pass through a hole and fall to the bottom of the tank, the shape of the hole has no special requirement, the lower edge of the baffle is cut off when the equipment is processed, the top view is a crescent hole, the middle partition plate 9 plays a role of baffling, the liquid in front of the feed inlet 4 and the middle partition plate 9 flows downwards, and the liquid between the middle partition plate 9 and the first discharge hole 12 flows upwards.

The lower end of the baffle plate 14 is provided with a notch.

The baffle 14 is at a 45 degree angle to the barrel 16.

The upper end face of the middle partition plate 9 is 430-50 cm higher than the feeding hole, and the lower end face of the middle partition plate 9 is 1230-50 cm lower than the first discharging hole.

Be equipped with lug 2 and supporting seat 5 on the barrel 16, lug 2 all is equipped with two, and supporting seat (5) are equipped with four for support the flash distillation crystallizer.

An angle of 45 degrees is formed between the middle clapboard 9 and the two lifting lugs 2.

The feed inlet 4 is located at the two-thirds position of the height of the cylinder 16 relative to the ground, the first discharge outlet 12 is located at the one-third position of the height of the cylinder 16 relative to the ground, further, the feed inlet 4 and the first discharge outlet 12 are distributed at two sides of the middle partition plate 9 and are symmetrically distributed, and the middle partition plate 9 is located at the center of the axis of the cylinder 16.

Baffle reinforcing ribs 11 are fixedly connected between the baffle 14 and the cylinder 16.

A clapboard reinforcing rib 10 is fixedly connected between the middle clapboard 9 and the inner wall of the cylinder 16, and the clapboard reinforcing ribs 10 are positioned at two sides of the middle clapboard 9.

Example (b): the application of the utility model in a sulfuric acid-ferrous sulfate system is as follows: 33 percent sulfuric acid-ferrous sulfate raw material liquid heated to 110 ℃ enters a flash evaporation crystallization tank from a feed inlet 4, steam generated by flash evaporation is discharged from an upper flash evaporation steam outlet 7, most of liquid flows out from a first discharge outlet 12 in the middle, a small part of liquid containing large-particle crystals flows out from a second discharge outlet 6 at the bottom, the liquid flowing out from the first discharge outlet 12 supplements the raw material liquid, then is heated to 110 ℃ and enters the flash evaporation crystallization tank, the liquid flowing out from the second discharge outlet 6 is centrifuged to obtain ferrous sulfate crystals with the particle size of 10-110A, in the production practice, when the temperature of the fed raw material liquid is controlled to be 110 ℃, the flow of the first discharge outlet 12 accounts for 99 percent, and the flow of the second discharge outlet 6 accounts for 1 percent, the system realizes stable and continuous operation, at the moment, the temperature in the flash evaporation crystallization tank is stabilized at 106 +/-2 ℃, the obtained crystal particles are uniform, easy to separate for shipment.

The working principle is as follows: a flash evaporation crystallization tank for continuous production comprises a top cover 15, a cylinder 16 and a cone bottom 17, wherein the top cover 15 is welded on the upper end surface of the cylinder 16, the cone bottom 17 is fixedly welded on the lower end surface of the cylinder 16, when equipment runs, sulfuric acid-ferrous sulfate raw material liquid with concentration of 33% and heated to 110 ℃ enters a tank body from a feed inlet 4 to be flashed to lose part of solvent, solute is partially crystallized, crystal grains are gradually increased along with the time extension, when the liquid flows from the inlet side of the feed inlet 4 to the outlet side of a first discharge outlet 12, the liquid is changed from descending operation to ascending operation, large-particle crystals capable of overcoming the ascending buoyancy are deposited on the cone bottom 17 and flow out from a second discharge outlet 6, micro crystal particles incapable of overcoming the ascending buoyancy flow out from the first discharge outlet 12 along with the rising of the liquid, a small amount of large-particle crystals formed before flowing out of the first discharge outlet 12 are settled from a baffle notch 13 at the bottom of an inclined baffle 14 and enter the cone bottom 17, the liquid flowing out from the first discharge port 12 is heated and then enters the flash evaporation crystallizing tank from the feed port 4, so that the continuous circulation of the crystallizing process is realized.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents, and it is intended that the described embodiments of the utility model be construed as merely a subset of the embodiments of the utility model and not as a whole. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims

1. A flash crystallization jar for continuous production, includes top cap (15), barrel (16) and awl end (17), top cap (15) welding is in barrel (16) up end, awl end (17) fixed welding is in the terminal surface under barrel (16), its characterized in that: be equipped with instrument measurement mouth (1) on top cap (15), be equipped with manhole (8), instrument measurement mouth (1) on top cap (15), be equipped with flash evaporation steam outlet (7) on manhole (8), be equipped with feed inlet (4), first discharge gate (12) on barrel (16), barrel (16) inside intermediate bottom (9) and baffle (14) of being equipped with respectively, baffle (14) lower extreme and barrel (16) inner wall fixed connection, baffle (14) slope sets up, baffle (14) are located first discharge gate (12) one side, and baffle (14) lower extreme is located first discharge gate (12) lower part, intermediate bottom (9) and barrel (16) inner wall fixed connection, awl end (17) bottom side is equipped with second discharge gate (6).

2. A flash crystallization tank for continuous production according to claim 1, characterized in that: the lower end of the baffle (14) is provided with a gap.

3. A flash crystallization tank for continuous production according to claim 2, characterized in that: the baffle (14) and the cylinder (16) form an angle of 45 degrees.

4. A flash crystallization tank for continuous production according to claim 1, characterized in that: the upper end face of the middle partition plate (9) is 30-50 cm higher than the feeding hole (4), and the lower end face of the middle partition plate (9) is 30-50 cm lower than the first discharging hole (12).

5. A flash crystallization tank for continuous production according to claim 1, characterized in that: the barrel (16) is provided with two lifting lugs (2) and two supporting seats (5), and the lifting lugs (2) are arranged.

6. A flash crystallization tank for continuous production according to claim 5, characterized in that: the middle partition plate (9) and the two lifting lugs (2) form an angle of 45 degrees.

7. A flash crystallization tank for continuous production according to claim 1, characterized in that: the feeding hole (4) is located at the position of two-thirds of the height of the cylinder body (16) relative to the ground, and the first discharging hole (12) is located at the position of one-third of the height of the cylinder body (16) relative to the ground.

8. A flash crystallization tank for continuous production according to claim 3, characterized in that: baffle strengthening ribs (11) are fixedly connected between the baffle (14) and the cylinder (16).

9. A flash crystallization tank for continuous production according to claim 6, characterized in that: and a partition plate reinforcing rib (10) is fixedly connected between the middle partition plate (9) and the inner wall of the barrel body (16), and the partition plate reinforcing rib (10) is positioned on two sides of the middle partition plate (9).

10. A flash crystallization tank for continuous production according to claim 1, characterized in that: the top cover (15) is oval.