CN115414690B

CN115414690B - Crystallizer

Info

Publication number: CN115414690B
Application number: CN202211079471.7A
Authority: CN
Inventors: 陈黎; 秦天苍; 崔凤霞; 寇刘秀; 曹晓伟; 史立军; 陈高明; 史政豪; 陈慧霞; 刘畅; 王欲翠; 史小利; 孙秋月; 周颖; 朱腾跃
Original assignee: Xintuoyang Bioengineering Co ltd
Current assignee: Xintuoyang Bioengineering Co ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2023-06-20
Anticipated expiration: 2042-09-05
Also published as: CN115414690A

Abstract

The utility model relates to a crystallizer, which comprises a separating tank, an evaporator, a heating device and a stirring mechanism, wherein the evaporator is arranged above the separating tank and is communicated with the separating tank, a secondary steam outlet is arranged on the upper position of the peripheral wall of the evaporator, a feed inlet of the evaporator is connected with a first material pipe, the first material pipe is connected with an outlet of a circulating pump, an inlet of the circulating pump is connected with one end of a second material pipe, the other end of the second material pipe is connected with a discharge outlet of the separating tank, one section of the first material pipe passes through the heating device, the heating device comprises a steam pipeline, and the evaporator comprises a feed pipe which vertically extends downwards to a position below half of the height of the separating tank; the stirring mechanism comprises a stirring motor, a stirring rod and a stirring sheet component. The stirring device is provided with the stirring mechanism under the condition of arranging the downward extending feeding pipe, and creatively designs the stirring blade assembly, and the stirring blade is of a movable structure and has two states of opening and closing, so that the device can meet the installation requirement and has a stirring function.

Description

Crystallizer

Technical Field

The utility model relates to the technical field of crystallization equipment, in particular to a crystallizer.

Background

The crystallizer is a device for crystallization, and can be divided into an evaporative crystallizer and a cooling crystallizer according to the method of obtaining supersaturation state of solution. The principle of the evaporation crystallizer is as follows: in the heat exchange device of the heater, the temperature of the material liquid heated by steam rises, the material liquid rises to the evaporation separator under the action of the circulating pump, the material is evaporated due to the fact that the static pressure of the material drops, and secondary steam generated by evaporation overflows and is discharged. The material is concentrated to generate supersaturation to enable crystallization to grow, the material with the supersaturation removed enters a circulating pump to continue to circulate to a heat exchange device and an evaporation separator, and after the material is reciprocated for a plurality of times, the purpose of purifying chemical substances is achieved.

Some evaporative crystallizers can be used for conveying circulating feed liquid through a feeding pipe extending into the bottom of the container, so that the feed liquid is prevented from being pumped away by the circulating pump rapidly, and the feed liquid is more uniform, such as the stable crystallizer disclosed in the prior patent publication No. CN 209307404U. But there is a problem in that the stirring means is provided in a space where the stirring portion is extended downward because the stirring means is generally fixed to the upper portion of the container. The setting of the stirring device can improve the crystallization speed and the production efficiency. Therefore, how to adjust and optimize the configuration relation between different elements is a problem to be solved.

Disclosure of Invention

The utility model aims to provide a crystallizer, which is designed through structural optimization to improve the crystallization efficiency of the crystallizer.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the crystallizer comprises a separating tank, an evaporator, a heating device and a stirring mechanism, wherein the evaporator is arranged above the separating tank and is communicated with the separating tank, a secondary steam outlet is formed in the upper position of the peripheral wall of the evaporator, a feed inlet of the evaporator is connected with one end of a first material pipe, the other end of the first material pipe is connected with an outlet of a circulating pump, an inlet of the circulating pump is connected with one end of a second material pipe, the other end of the second material pipe is connected with a discharge hole of the separating tank, and the circulating pump is used for realizing circulation of liquid materials;

one section of the first material pipe passes through the heating device, and the heating device comprises a steam pipeline which passes through circulated steam so as to heat the material liquid in the first material pipe;

the bottom of the evaporator is funnel-shaped and comprises a feeding pipe which vertically extends downwards to a position below half the height of the separating tank; the stirring mechanism comprises a stirring motor, a stirring rod and a stirring sheet component, wherein the stirring motor is inversely arranged at the upper end of the evaporator, an output shaft of the stirring motor is connected with the stirring rod, the stirring rod penetrates through the feeding pipe and extends to the lower part of the feeding pipe, the stirring sheet component is arranged at the lower end of the stirring rod, the stirring sheet component is in an opening state and a closing state, the maximum outer diameter of the stirring sheet component is smaller than the inner diameter of the feeding pipe when the stirring sheet component is in the closing state, and the maximum outer diameter of the stirring sheet component is larger than the inner diameter of the feeding pipe when the stirring sheet component is in the opening state;

the stirring piece subassembly include with the cylinder of the coaxial setting of puddler, the periphery wall of cylinder is equipped with three stirring piece along the even interval of the periphery direction of cylinder, and the main part of stirring piece is the arc, and stirring piece one end articulates at the periphery wall of cylinder through the hinge, and the other end of stirring piece extends the setting to the direction slope of keeping away from the cylinder, forms the atress portion, after receiving the reaction force of feed liquid, the stirring piece can be expanded certain angle in order to reach the open state by closed state.

Further, three stirring sheets are arranged adjacently at the periphery of the column body in sequence in a head-to-tail mode, and the opening directions of the stirring sheets are consistent.

Further, a plurality of through liquid holes are formed in the stirring piece.

Further, a limiting block is arranged on the back side of the stirring piece at a position close to the hinge shaft, and when the stirring piece assembly is in an open state, the limiting block abuts against the outer side wall of the cylinder to limit the stirring piece.

Further, the periphery wall interval of cylinder is provided with three plane, be provided with the articulated seat on the plane, the stirring piece articulates on this articulated seat.

Further, the lower end part of the feeding pipe extends outwards to form a horn mouth shape.

Further, heating device includes heat preservation shell and sets up the steam conduit in the heat preservation shell, and steam conduit spiral sets up in first material pipe periphery, and steam conduit is equipped with two, and two steam conduit set up side by side, and two steam conduit's inlet tube mouth is connected with the trunk line through a three way connection, supplies steam by the trunk line, and three way connection's first section is connected with the trunk line, and three way connection's second section and third section are connected with two steam conduit respectively, are equipped with a ball valve respectively in second section, the third section for the break-make of two steam conduit of independent control.

Further, a flow-around plate is arranged in the evaporator and is obliquely arranged on the inner wall of the evaporator, the secondary steam outlet is positioned on the upper right side of the evaporator, the feeding inlet of the evaporator is positioned on the lower left side of the evaporator, the flow-around plate is positioned below the secondary steam outlet, and a liquid passing hole is formed in the bottom of the flow-around plate.

Further, a discharge pipe is arranged on the right lower side of the separation tank, a flow blocking plate is arranged at the bottom of the separation tank and is cone-shaped and is arranged on the inner wall of the separation tank in a surrounding mode, the upper end of the flow blocking plate is lower than the lower end of the stirring piece assembly, and the lower end of the flow blocking plate is higher than the position of the discharge pipe.

Further, the evaporator bottom cartridge is in the upper portion of knockout drum, and the outside of knockout drum is equipped with three supporting component, and each supporting component evenly arranges along knockout drum periphery direction, and supporting component includes the bracing piece, and the bracing piece lower extreme articulates on the knockout drum, and the bracing piece upper end is equipped with the backing plate, and the axis direction slope setting of backing plate and bracing piece, and both contained angles are 111, and the knockout drum forms 92 contained angles with the position of evaporimeter butt joint, and the surface of backing plate is equipped with the rubber layer, and the rubber layer top of backing plate is tightly in the evaporimeter outside.

The utility model has the beneficial effects that:

when the liquid is circulated, the liquid is heated in the heating device, is discharged to the evaporator from the first material pipe, flows to the bottom of the separating tank through the material feeding pipe at the lower part of the evaporator, and can avoid the impact of the crystallized part in the separating tank when the circulated liquid drops in the air, and the liquid enters the relatively lower position of the separating tank, after the crystallization process, the liquid rises again and is pumped away by the second material pipe under the action of the circulating pump, so that the liquid just circulated is prevented from being pumped away rapidly, and the crystallization efficiency is improved. Under the condition of a feeding pipe, a stirring mechanism is configured at the same time, the stirring piece assembly is creatively designed, the stirring piece is of a movable structure and has two states of opening and closing, when the stirring piece assembly is in a closed state, the maximum outer diameter of the stirring piece assembly is smaller than the inner diameter of the feeding pipe, and when the stirring piece assembly is in an open state, the maximum outer diameter of the stirring piece assembly is larger than the inner diameter of the feeding pipe. When the stirring blade assembly is installed, the stirring blade assembly is retracted and can pass through the inner cavity of the feeding pipe; when the stirring motor is started, the stirring blade component is subjected to the rotation resistance of the material liquid, and can be opened, so that the stirring function is realized.

Further, the stirring piece is provided with a liquid through hole, so that the resistance of the working state after the stirring piece is opened is reduced.

Further, set up three plane at the periphery wall of cylinder, the stirring piece articulates in this department for the space that stirring piece closed state occupy is littleer, does benefit to the whole external diameter that reduces stirring piece subassembly.

Further, two steam pipelines are arranged, and the heating degree can be adjusted in an independent and controllable mode.

Further, through setting up a plurality of supporting component at evaporimeter and knockout drum, supporting component's bracing piece one end articulates rotatablely, and the other end is provided with the backing plate, makes backing plate upwards push up the evaporimeter outer wall to the terminal surface of backing plate sets up the rubber layer through the application of force. Through this supporting component, can improve the stability between evaporimeter and knockout drum, still have certain shock attenuation effect.

Drawings

FIG. 1 is a schematic front view of a crystallizer according to the present utility model;

FIG. 2 is a schematic illustration of a single steam conduit of a heating device;

FIG. 3 is a schematic view of a three-way fitting connected to a steam conduit;

FIG. 4 is a schematic diagram of the principle of winding two steam pipes in a heating device;

FIG. 5 is a schematic view of the inside of the crystallizer body of the present utility model;

FIG. 6 is a partial schematic view of the upper right side of FIG. 5;

FIG. 7 is a schematic top view of the evaporator with the top cover broken away;

FIG. 8 is a schematic structural view of a stirring blade assembly (showing a portion of a stirring rod);

FIG. 9 is another angular schematic view of a stirring blade assembly (stirring blade in closed position);

FIG. 10 is a schematic view of the open state of the agitator blade assembly;

FIG. 11 is a schematic view of another angle of the open state of the agitator blade assembly;

FIG. 12 is a schematic view of a portion of a crystallizer of the present utility model;

FIG. 13 is a partial schematic view of the support assembly of FIG. 12;

fig. 14 is a schematic structural view of the support assembly.

Name corresponding to each label in the figure:

1. an evaporator; 11. a secondary steam outlet; 12. a feed inlet; 13. a feed pipe; 14. a flow-around plate; 141. a liquid passing hole; 2. a separation tank; 21. a discharge pipe; 22. a spoiler; 3. a heating device; 31. a thermal insulation housing; 32. an exhaust pipe orifice; 33. a steam pipe; 34. a three-way joint; 341. a ball valve; 4. a circulation pump; 51. a stirring motor; 52. a stirring rod; 53. a stirring blade assembly; 531. a column; 5311. a plane; 532. stirring sheets; 5321. a liquid through hole; 5322. a force receiving part; 533. a limiting block; 534. a hinge base; 61. a first material pipe; 62. a second material pipe; 621. an initial liquid inlet pipe orifice; 7. a main pipe; 71. a flow meter; 8. a support assembly; 81. a support rod; 82. a backing plate; 83. a hinge shaft; 9. the bottom plate is reinforced.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

Examples:

as shown in fig. 1 to 14, a crystallizer comprises a separation tank 2, an evaporator 1, a heating device 3 and a stirring mechanism, wherein the evaporator 1 is arranged above the separation tank 2 and is communicated with the separation tank 2, and a secondary steam outlet 11 is arranged at the upper position of the peripheral wall of the evaporator 1. The feed inlet 12 of the evaporator 1 is positioned at the left lower side of the evaporator 1, the feed inlet 12 of the evaporator 1 is connected with one end of a first material pipe 61, the other end of the first material pipe 61 is connected with the outlet of a circulating pump 4, the inlet of the circulating pump 4 is connected with one end of a second material pipe 62, the other end of the second material pipe 62 is connected with the discharge port of the separation tank 2, and the discharge port is positioned at the left side of the upper part of the separation tank 2. The circulating pump 4 is used for realizing the circulation of liquid material, and the circulating pump 4 belongs to the prior art.

One of the sections of the first pipe 61 passes through the heating device 3, and the heating device 3 comprises a steam pipe 33, and the steam pipe 33 passes through circulated steam to heat the feed liquid in the first pipe 61.

As shown in fig. 1 and 2, the heating device 3 includes a heat insulation housing 31 and a steam pipe 33 disposed in the heat insulation housing 31, where the heat insulation housing 31 is cylindrical and may be made of a known heat insulation material, and details are not repeated. The steam pipes 33 are spirally arranged at the periphery of the first pipe 61, two steam pipes 33 are arranged side by side, and the two steam pipes 33 are spirally wound in sequence, as shown in fig. 2, which is a schematic winding diagram of a single steam pipe 33, and in order to improve the heating effect, the diameter of a part of the pipe section of the first pipe 61 in the heating device 3 is thicker than that of the outer side. Fig. 4 shows a schematic view of two steam pipes 33 arranged side by side, one shown in solid lines and the other in dashed lines.

As shown in fig. 3, the inlet pipe openings of the two steam pipes 33 are connected with the main pipe 7 through a three-way joint 34, the main pipe 7 supplies steam, the three-way joint 34 comprises three sections, a first section is connected with the main pipe 7, a second section and a third section of the three-way joint 34 are respectively connected with the two steam pipes 33, and the three sections are communicated, namely, the three-way function is realized. The second section and the third section are respectively provided with a ball valve 341 for independently controlling the on-off of the two steam pipelines 33, and the ball valves 341 are in the prior art. The main pipe 7 is provided with a flowmeter 71 which displays the total supply flow of steam; the main pipeline 7 is connected with an existing steam boiler and is connected with steam. The on-off of the two steam pipelines 33 is independently controlled, and the heating degree can be adjusted according to the requirement.

After the steam exchanges heat with the feed liquid in the first material pipe 61, the steam is discharged through the exhaust pipe orifice 32 of the steam pipe 33, and the exhaust pipe orifices 32 of the two steam pipes 33 are connected to the return pipe through a conventional three-way pipe. The steam flows from the inside of the steam pipe 33 from the top to the bottom.

As shown in fig. 1 and 5, the evaporator 1 has a cylindrical main body, and a secondary steam outlet 11 is formed in the upper right side of the evaporator 1 for discharging steam generated by evaporating the feed liquid. The bottom of the evaporator 1 is funnel-shaped and comprises a feed pipe 13, the feed pipe 13 extending vertically downwards to a position below half the height of the separator tank 2. The lower end of the feed pipe 13 extends outwardly in a bell mouth shape. When the feed liquid falls down from above, the impact on the crystallized crystals at the bottom of the separation tank 2 can be reduced by providing the feed liquid with the bell mouth shape, and the feed liquid can be split outward.

The feed port 12 of the evaporator 1 is located at the left lower side of the main body of the evaporator 1 and is connected to the first pipe 61. The forced circulation feed liquid is returned to the evaporator 1 through the first pipe 61 and the feed port 12. Before the circulation starts, the raw material liquid is fed through an initial liquid inlet pipe orifice 621 arranged on the second material pipe 62, when the raw material liquid is fed to a certain amount, the first material pipe 61 is disconnected from an external raw material liquid conveying pipeline, the initial liquid inlet pipe orifice 621 is not fed any more, and the material liquid in the separation tank 2 is in a nearly full degree but not full, so that the material liquid can be circulated under the action of the first circulating pump 4. At the beginning, the feed liquid is insufficient, the circulation is not realized, and the method is equivalent to the prior feeding into the separation tank 2. The feed liquid from the feed inlet 12 of the evaporator 1 falls downward and is discharged through the feed pipe 13 to the bottom region of the separator tank 2. When the feed liquid reaches a supersaturated state, part of solute is deposited on the surface of suspended grains to enable crystals to grow up, and crystal slurry is heated from the upper part of the separation tank 2 through the second material pipe 62, the circulating pump 4 and the first material pipe 61 and then returns to the evaporator 1 to be evaporated and crystallized again. The principle of evaporation crystallization is the prior art, and the utility model is mainly aimed at the optimal design of equipment structure.

Further, as shown in fig. 5, 6 and 7, a flow-around plate 14 is provided in the evaporator 1, the flow-around plate 14 is obliquely provided on the inner wall of the evaporator 1, and the flow-around plate 14 is located below the secondary steam outlet 11. A passage is formed between the upper part of the bypass plate 14 and the inner ceiling wall of the evaporator 1 for the so-called secondary steam generated by evaporation to pass through and be discharged through the secondary steam outlet 11. The bypass plate 14 is arranged such that the evaporated fraction flows around the bypass plate 14 instead of directly towards the position of the secondary steam port. Can play a role in preventing the solution or solute in the solution from losing to a certain extent. The bottom of the bypass plate 14 is provided with a through-hole 141 for allowing the liquid to flow back to the separator tank 2. In order to facilitate the arrangement of the flow-around plate 14, a cover plate is arranged at the top of the evaporator 1, and after the flow-around plate 14 is fixed in a welding manner, the cover plate is welded and fixed.

As shown in fig. 5 and fig. 8-11, the stirring mechanism comprises a stirring motor 51, a stirring rod 52 and a stirring sheet component 53, wherein the stirring motor 51 is inversely arranged at the upper end of the evaporator 1, and the motor is a variable frequency motor in the prior art, so that the stirring speed can be set. The output shaft of the stirring motor 51 is connected to the stirring rod 52, and the stirring rod 52 passes through the feeding pipe 13 and extends below the feeding pipe 13. The stirring blade assembly is arranged at the lower end of the stirring rod 52, the stirring blade assembly has two states of opening and closing, when the stirring blade assembly 53 is in the closed state, the maximum outer diameter of the stirring blade assembly is smaller than the inner diameter of the feeding pipe 13, and when the stirring blade assembly 53 is in the open state, the maximum outer diameter of the stirring blade assembly is larger than the inner diameter of the feeding pipe 13. The stirring blade assembly is arranged in a variable state structure mode, so that the contradiction problem between the feeding pipe 13 and the stirring motor 51 arranged at the upper part is solved, and when the stirring blade assembly is installed, the stirring blade assembly can be retracted and can penetrate through the inner cavity of the feeding pipe 13; when the stirring motor 51 is started, the stirring blade assembly is turned on due to the rotation resistance of the material liquid, and the stirring function is realized.

Specifically, the stirring blade 532 assembly includes a column 531 coaxially provided with the stirring rod 52, and three stirring blades 532 are provided at uniform intervals along the outer circumferential direction of the column 531 on the outer circumferential wall of the column 531. The main body is in a cylinder 531 shape, three planes 5311 are machined on the outer peripheral wall of the cylinder 531 at intervals, and the planes 5311 are vertical planes and can be milled by a milling cutter. The flat surface 5311 is provided with a hinge seat 534 to which the stirring blade 532 is hinged in a hinge-like manner.

The main part of stirring piece 532 is the arc, and stirring piece 532 one end articulates the periphery wall at cylinder 531 through the hinge, and stirring piece 532 other end extends to the direction slope that keeps away from cylinder 531 and sets up, forms atress portion 5322, after receiving the reaction force of feed liquid, stirring piece 532 can be expanded certain angle in order to reach the open state from the closed state.

The three stirring blades 532 are arranged adjacently at the periphery of the cylinder 531 in turn, and the opening directions of the stirring blades 532 are consistent. The stirring blade 532 is provided with a plurality of through holes 5321, so that the reaction force of the feed liquid can be reduced after the stirring blade 532 is opened.

The back side of the stirring blade 532 is provided with a limiting block 533 near the hinge shaft, when the stirring blade 532 is in an open state, the limiting block 533 abuts against the outer side wall (at the plane 5311) of the cylinder 531, so as to limit the stirring blade 532, that is, limit the opening angle of the stirring blade 532, and when normal stirring is performed, the stirring blade 532 is in a stable rotating state.

As shown in fig. 5, a discharge pipe 21 is arranged at the right lower side of the separation tank 2, a flow blocking plate 22 is arranged at the bottom of the separation tank 2, the flow blocking plate 22 is cone-shaped and is annularly arranged on the inner wall of the separation tank 2, the upper end of the flow blocking plate 22 is lower than the lower end of the stirring mechanism, and the lower end of the flow blocking plate 22 is higher than the position of the discharge pipe 21. The vertical height of the spoiler 22 is set to be about 5cm, and a certain slow flow effect is achieved. The material liquid at the upper side is mainly circularly evaporated again after the bottom is crystallized and can not participate in forced circulation.

As shown in fig. 12, 13 and 14, the bottom of the evaporator 1 is inserted into the upper portion of the separation tank 2, and three support members 8 are provided on the outer side of the separation tank 2 for the purpose of improving stability and reducing vibration influence caused by motor operation. Each supporting component 8 is evenly arranged along the peripheral direction of the separating tank 2, each supporting component 8 comprises a supporting rod 81, the lower end of each supporting rod 81 is hinged to the separating tank 2, each supporting rod 81 is a round rod or a square rod, and each supporting rod 81 can rotate around a hinged shaft 83. The upper end of the supporting rod 81 is provided with a base plate 82, the base plate 82 and the axial direction of the supporting rod 81 are obliquely arranged, the included angle between the base plate 82 and the supporting rod is 111 degrees, and the butt joint position of the separating tank 2 and the evaporator 1 forms an included angle of 92 degrees. The surface of the base plate 82 is provided with a rubber layer, which has a certain elastic function and can absorb vibration. When the evaporator 1 and the separating tank 2 are installed, the angle of the abutting position of the separating tank 2 and the evaporator 1 is known. The angles of the base plate 82 and the supporting rod 81 are calculated, the base plate 82 is gradually close to the outer wall of the evaporator 1 by rotating the supporting rod 81, and after the base plate 82 is contacted, the supporting rod 81 is in an inclined state and then is pressed down by force, so that the rubber layer of the base plate 82 is tightly pressed on the outer side of the evaporator 1.

Further, as shown in fig. 12, a reinforcing bottom plate 9 is provided at the bottom of the separation tank 2, the edge of the reinforcing bottom plate 9 extends out of the separation tank 2, bolt holes are provided in the extending portion, and the separation tank 2 can be fixed by anchor bolts.

The present utility model is not limited to the above-described preferred embodiments, and any person who can obtain other various products under the teaching of the present utility model, however, any change in shape or structure of the product is within the scope of the present utility model, and all the products having the same or similar technical solutions as the present application are included.

Claims

1. A crystallizer characterized in that: the device comprises a separating tank, an evaporator, a heating device and a stirring mechanism, wherein the evaporator is arranged above the separating tank and is communicated with the separating tank, a secondary steam outlet is formed in the upper position of the peripheral wall of the evaporator, a feed inlet of the evaporator is connected with one end of a first material pipe, the other end of the first material pipe is connected with an outlet of a circulating pump, an inlet of the circulating pump is connected with one end of a second material pipe, the other end of the second material pipe is connected with a discharge hole of the separating tank, and the circulating pump is used for realizing circulation of liquid materials;

2. The crystallizer as in claim 1, wherein: the three stirring sheets are arranged adjacently at the periphery of the column body in sequence in the head-tail mode, and the opening directions of the stirring sheets are consistent.

3. The crystallizer as in claim 1, wherein: the stirring piece is provided with a plurality of through holes.

4. The crystallizer as in claim 1, wherein: the back side of stirring piece is equipped with the stopper in the position that is close to the hinge, and when stirring piece subassembly was in the open state, the stopper butt the lateral wall of cylinder to it is spacing to the stirring piece.

5. The crystallizer as in any one of claims 1 to 4, wherein: the periphery wall interval of cylinder is provided with three plane, be provided with articulated seat on the plane, the stirring piece articulates on this articulated seat.

6. The crystallizer as in claim 1, wherein: the lower end of the feeding pipe extends outwards to form a horn mouth shape.

7. The crystallizer as in claim 1, wherein: the heating device comprises a heat preservation shell and steam pipelines arranged in the heat preservation shell, wherein the steam pipelines are spirally arranged on the periphery of a first material pipe, two steam pipelines are arranged in parallel, air inlet pipe orifices of the two steam pipelines are connected with a main pipeline through a three-way joint, steam is supplied to the main pipeline by the main pipeline, a first section of the three-way joint is connected with the main pipeline, a second section and a third section of the three-way joint are respectively connected with the two steam pipelines, and a ball valve is respectively arranged on the second section and the third section and used for independently controlling the on-off of the two steam pipelines.

8. The crystallizer as in claim 1, wherein: the evaporator is internally provided with a flow-around plate, the flow-around plate is obliquely arranged on the inner wall of the evaporator, the secondary steam outlet is positioned on the upper right side of the evaporator, the feeding inlet of the evaporator is positioned on the lower left side of the evaporator, the flow-around plate is positioned below the secondary steam outlet, and a liquid passing hole is formed in the bottom of the flow-around plate.

9. The crystallizer of claim 8, wherein: the separating tank is characterized in that a discharge pipe is arranged on the lower right side of the separating tank, a flow blocking plate is arranged at the bottom of the separating tank and is cone-shaped, the flow blocking plate is arranged on the inner wall of the separating tank in a surrounding mode, the upper end of the flow blocking plate is lower than the lower end of the stirring mechanism, and the lower end of the flow blocking plate is higher than the position of the discharge pipe.

10. The crystallizer as in claim 1, wherein: the utility model provides an evaporator, including the separator, the cartridge is in the separator, the evaporator bottom cartridge is in the upper portion of separator, and the outside of separator is equipped with three supporting component, and each supporting component evenly arranges along separator periphery direction, and supporting component includes the bracing piece, and the bracing piece lower extreme articulates on the separator, and the bracing piece upper end is equipped with the backing plate, and the backing plate sets up with the axis direction slope of bracing piece, and both contained angles are 111, and the separator forms 92 contained angles with the position of evaporator butt joint, and the surface of backing plate is equipped with the rubber layer, and the rubber layer top of backing plate is tightly in the evaporator outside.