An evaporation separation system for alkali liquor concentration and its use method

Abstract

The present invention discloses an evaporation separation system for alkali liquor concentration and a use method thereof, relating to the field of alkali liquor concentration and evaporation separation. The evaporation separation system for alkali liquor concentration comprises an inner tank, wherein the inner tank is provided with a plurality of evaporation chambers for evaporation, and further comprises: an inner sleeve fixedly connected to the evaporation chamber by a mounting rod, wherein the inner sleeve is provided with a lifting component for lifting the liquid in the evaporation chamber toward the top of the inner sleeve; the present invention arranges an outer tank outside the inner tank, the outer tank is used to absorb heat radiated outward from the inner tank, collects the heat and avoids waste, and at the same time arranges a lifting component in the inner tank to lift the alkali liquor in the evaporation chamber upward and spray it onto a splash plate from a spray port, so that the alkali liquor is dispersed in the evaporation chamber, and then when the alkali liquor is discharged into the outer tank through the liquid discharge port, it is evaporated again through the outer tank, thereby improving evaporation efficiency and avoiding heat loss by collecting heat through the outer tank.

Description

Technical Field

[0001] The invention belongs to the technical field of alkali liquor concentration, evaporation and separation, and in particular relates to an evaporation and separation system for alkali liquor concentration. Background Art

[0002] The process gas produced in the methanol-to-olefins process contains a certain amount of acidic gases such as H2S and CO2, as well as a certain amount of organic sulfides. In the olefin recovery unit, an alkali scrubber is installed to absorb the acidic gases, producing a large amount of waste alkali liquid containing inorganic salts such as sodium hydroxide, sodium sulfide, and sodium carbonate.

[0003] However, the waste alkali liquid contains a large amount of water, resulting in a relatively low alkali liquid content. In order to increase the alkali liquid content ratio, the existing method is to pass the alkali liquid into a double-effect distiller to evaporate the water in the alkali liquid, thereby achieving the purpose of increasing the alkali liquid content ratio; however, in the prior art, after the alkali liquid enters the distiller, the alkali liquid is in a concentrated state, and the contact area with the heat in the distiller is small. The heat in the distiller cannot quickly evaporate the concentrated alkali liquid, resulting in low evaporation efficiency and large heat loss, which increases the production cost of the enterprise during the production process.

[0004] To this end, we propose an evaporation separation system for alkali liquor concentration. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an evaporation separation system for alkali liquor concentration that can overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: an evaporation separation system for concentrating alkali liquid, comprising an inner tank, wherein a plurality of evaporation chambers for evaporation are provided in the inner tank, and further comprising: an inner sleeve fixedly connected to the evaporation chamber by a mounting rod, a lifting component provided in the inner sleeve, for lifting the liquid in the evaporation chamber to the top of the inner sleeve; a spray outlet provided on the outer wall of the inner sleeve, the spray outlet being inclined upward, wherein, when the lifting component lifts the liquid in the evaporation chamber into the inner sleeve, the liquid is sprayed outward from the spray outlet; a splash plate movably arranged in the inner tank at one end, the spray outlet corresponding to the side surface of the splash plate; a reciprocating driving component arranged in the evaporation chamber, for reciprocatingly changing the spacing and angle between the side surface of the splash plate and the spray outlet; a heat source component arranged in the inner tank, for heating the evaporation chamber.

[0007] Preferably, the lifting component includes a spiral conveying piece, which is rotatably arranged in the inner sleeve, and a gap is left between the inner sleeve and the bottom wall of the evaporation chamber.

[0008] Preferably, the reciprocating drive component includes a connecting plate, a protruding rod is fixedly connected to the connecting plate, a plurality of mounting blocks are fixedly connected to the circumference of the inner wall of the inner tank, one end of the splash plate is rotatably connected to the mounting block, the splash plate is fixedly connected to the top wall of the evaporation chamber by a spring, and the protruding rod corresponds to the side of the splash plate close to the ejection port.

[0009] Furthermore, arc-shaped connecting plates are fixedly connected to both sides of the connecting plate, and the arc-shaped connecting plates correspond to the protruding rods.

[0010] Furthermore, it also includes: an outer tank arranged outside the inner tank, and a plurality of intermittently opened drainage ports are opened on the circumference of the inner tank, and the drainage ports intermittently connect the evaporation chamber in the inner tank with the outer tank.

[0011] Preferably, a barrier sleeve is rotatably provided in the inner tank, and a corresponding opening corresponding to the liquid discharge port is opened on the circumference of the barrier sleeve.

[0012] Furthermore, a plurality of dispersion plates are fixedly connected to the outer wall of the inner tank, and the plurality of dispersion plates respectively correspond to the plurality of evaporation chambers in the inner tank. The distance between the plurality of dispersion plates and the outer wall of the inner tank decreases from top to bottom, and the dispersion plates correspond to the drainage ports on the evaporation chambers.

[0013] Preferably, it further comprises: a negative pressure component for generating negative pressure in the evaporation chamber to reduce the boiling point of the liquid in the evaporation chamber.

[0014] Furthermore, the negative pressure component includes a rotatably arranged eccentric wheel and a fixedly arranged piston cylinder, an annular connecting groove is opened on the outer circle of the eccentric wheel, a piston rod with a piston at one end is slidably connected in the piston cylinder, one end of the piston rod is slidably connected in the annular connecting groove, and an exhaust pipe and an exhaust pipe are fixedly connected to the piston cylinder, respectively, and the exhaust pipes are respectively connected to the evaporation chamber in the inner tank.

[0015] A method for using an evaporation separation system for alkali liquor concentration mainly comprises the following steps:

[0016] S1. The alkali solution to be evaporated is introduced into the evaporation chamber of the inner tank, heated by the heat source component in the evaporation chamber to evaporate the water in the alkali solution, and then the alkali solution in the evaporation chamber is ejected from the ejection port of the inner sleeve through the lifting component to diffuse the alkali solution in the evaporation chamber.

[0017] S2. The alkali liquid sprayed from the nozzle contacts the splash plate. After hitting the splash plate, the alkali liquid is further dispersed in the evaporation chamber. The reciprocating driving component drives the splash plate to reciprocate and change the distance and angle between the splash plate and the nozzle, so that the alkali liquid splashes in the evaporation chamber.

[0018] S3. The evaporated alkali liquid in the evaporation chamber is discharged into the outer tank through the intermittently opened drain port, and then evaporated through the outer tank.

[0019] S4. The alkali liquid discharged from the liquid discharge port falls into the dispersion plate and falls from the dispersion plate to the bottom of the outer tank in turn. During the falling process, the alkali liquid is evaporated again.

[0020] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: the present invention arranges an outer tank outside the inner tank, and the outer tank is used to absorb the heat dissipated outward by the inner tank, collects the heat, and avoids waste. At the same time, a lifting component is arranged in the inner tank to lift the alkali liquid in the evaporation chamber upward and spray it onto the splash plate from the spray port, so that the alkali liquid is dispersed in the evaporation chamber. When the alkali liquid is discharged into the outer tank through the drain port, it is evaporated again through the outer tank, thereby improving the evaporation efficiency, and collecting heat by the outer tank to avoid heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the attached figure:

[0022] Figure 1 This is a front view of an evaporation separation system for alkali liquor concentration proposed by the present invention;

[0023] Figure 2 This is a schematic structural diagram of an inner tank of an evaporation separation system for alkali liquor concentration proposed by the present invention;

[0024] Figure 3 This is a schematic structural diagram of an outer tank of an evaporation separation system for alkali liquor concentration proposed by the present invention;

[0025] Figure 4 This is a schematic structural diagram of a liquid discharge port of an evaporation separation system for alkali liquor concentration proposed by the present invention;

[0026] Figure 5 This is a schematic structural diagram of a dispersion disk of an evaporation separation system for alkali liquor concentration proposed by the present invention;

[0027] Figure 6 The present invention proposes an evaporation separation system for alkali liquor concentration Figure 5 Schematic diagram of the structure at A in the middle;

[0028] Figure 7 This is a schematic structural diagram of a spray port and a splash plate of an evaporation separation system for alkali liquor concentration proposed by the present invention;

[0029] Figure 8 This is a structural schematic diagram of the corresponding ports of an evaporation separation system for alkali liquor concentration proposed by the present invention;

[0030] Figure 9The present invention proposes an evaporation separation system for alkali liquor concentration Figure 8 Schematic diagram of the structure at B in the middle;

[0031] Figure 10 This is a structural schematic diagram of a spiral conveying plate for an evaporation separation system for alkali liquor concentration proposed by the present invention.

[0032] In the figure: 1. Outer tank; 11. Drain pipe; 2. Inner tank; 20. Evaporation chamber; 21. Drain port; 22. Main shaft; 221. Motor; 23. Barrier sleeve; 231. Connecting rod; 24. Corresponding port; 25. Dispersion disk; 26. Exhaust pipe; 3. Inner sleeve; 31. Spiral conveyor plate; 32. Spray port; 33. Splash plate; 331. Mounting block; 34. Spring; 35. Connecting plate; 351. Arc connecting plate; 36. Protruding rod; 4. Eccentric wheel; 41. Piston cylinder; 42. Piston rod; 43. Exhaust pipe; 44. Exhaust pipe; 5. Heat source component. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0034] Example 1:

[0035] Reference Figures 1-10 , an evaporation separation system for alkali liquid concentration, comprising an inner tank 2, wherein the inner tank 2 is provided with a plurality of evaporation chambers 20 for evaporation, and further comprising: an inner sleeve 3 fixedly connected to the evaporation chamber 20 by a mounting rod, the inner sleeve 3 being provided with a lifting component for lifting the liquid in the evaporation chamber 20 to the top of the inner sleeve 3; a spray port 32 opened on the outer wall of the inner sleeve 3, the spray port 32 being inclined upward, wherein, when the lifting component lifts the liquid in the evaporation chamber 20 into the inner sleeve 3, the liquid is sprayed outward from the spray port 32; a splash plate 33 movably arranged at one end in the inner tank 2, the spray port 32 corresponding to the side surface of the splash plate 33; a reciprocating driving component arranged in the evaporation chamber 20, for reciprocatingly changing the spacing and angle between the side surface of the splash plate 33 and the spray port 32; a heat source component 5 arranged in the inner tank 2, for raising the temperature in the evaporation chamber 20;

[0036] Reference Figure 2 , the inner tank 2 is fixedly connected with a plurality of liquid inlet pipes respectively connected to the evaporation chamber 20, for conveying the alkali solution to be concentrated into the evaporation chamber 20;

[0037] The heat source component 5 can be a heating tube, a heating wire or a steam tube, which is circumferentially arranged on the inner wall of the inner tank 2 to heat the alkali solution in the inner tank 2. The heat source output end of the heating tube can adopt a heat pump compressor unit, so that the heating tube generates heat to heat the inner tank 2, which is convenient and fast.

[0038] Reference Figure 2 、 Figure 9 、 Figure 10 The lifting component includes a spiral conveying piece 31, which is rotatably arranged in the inner sleeve 3, and a gap is left between the inner sleeve 3 and the bottom wall of the evaporation chamber 20;

[0039] The inner tank 2 is rotatably connected to a main shaft 22, which is fixedly connected to the output end of a motor 221, driving the main shaft 22 to rotate in the inner tank 2, and a spiral conveying piece 31 is fixedly connected to the main shaft 22, which is driven by the main shaft 22 to rotate, thereby sucking the liquid in the evaporation chamber 20 into the inner sleeve 3;

[0040] It should be understood that the open end of the inner sleeve 3 is immersed in the alkali solution in the evaporation chamber 20;

[0041] When the lifting component lifts the alkali solution into the inner sleeve 3, the alkali solution is sprayed out from the spray port 32 and sprayed into the space above the alkali solution in the evaporation chamber 20, so that the alkali solution is diffused in the evaporation chamber 20 and contacts the heat in the evaporation chamber 20, thereby improving the evaporation effect of the water in the alkali solution and avoiding the problem of slow evaporation efficiency caused by the accumulation of alkali solution.

[0042] When the alkali liquid is sprayed out from the spray port 32, the alkali liquid will be sprayed on the splash plate 33. After the alkali liquid contacts the splash plate 33, the alkali liquid further diffuses in the evaporation chamber 20, and the alkali liquid spreads out in a plane, further increasing the contact with the heat in the evaporation chamber 20 and improving the evaporation effect of the alkali liquid.

[0043] The lifting component can also be a water pump, which is installed on the inner tank 2. The output pipe of the water pump is connected to the spray port 32. The input pipe of the water pump is located in the alkali solution in the evaporation chamber 20, which can increase the force of the alkali solution sprayed out of the spray port 32.

[0044] Reference Figure 6 、 Figure 7 、 Figure 9 The reciprocating drive component includes a connecting plate 35, a protruding rod 36 is fixedly connected to the connecting plate 35, and a plurality of mounting blocks 331 are fixedly connected to the inner wall of the inner tank 2. One end of the splash plate 33 is rotatably connected to the mounting block 331. The splash plate 33 is fixedly connected to the top wall of the evaporation chamber 20 by a spring 34. The protruding rod 36 corresponds to the side of the splash plate 33 near the ejection port 32.

[0045] As the main shaft 22 rotates, the connecting plate 35 fixedly connected to the main shaft 22 will rotate together with the main shaft 22 in the evaporation chamber 20. When the connecting plate 35 rotates, the protruding rod 36 will reciprocally contact the splash plate 33, push the splash plate 33, and cause one end of the splash plate 33 to rotate, thereby reciprocatingly changing the spacing and angle between the splash plate 33 and the spray port 32. By reciprocatingly changing the spacing and angle between the splash plate 33 and the spray port 32, the alkali solution sprayed from the spray port 32 is splashed in the evaporation chamber 20 in an irregular shape, further increasing the contact area between the alkali solution and the heat.

[0046] Reference Figure 9 , arc-shaped connecting plates 351 are fixedly connected on both sides of the connecting plate 35, and the arc-shaped connecting plates 351 correspond to the protruding rods 36. The arc-shaped connecting plates 351 can push the splash plate 33 more smoothly when the protruding rods 36 contact the splash plate 33, so that the splash plate 33 changes the distance and angle between it and the ejection port 32.

[0047] Example 2:

[0048] Reference Figure 1 An evaporation separation system for alkali liquor concentration is substantially the same as that of Example 1, further comprising: an outer tank 1 disposed outside an inner tank 2, the inner tank 2 having a plurality of intermittently opened drainage ports 21 formed on its circumference, the drainage ports 21 intermittently connecting an evaporation chamber 20 in the inner tank 2 with the outer tank 1;

[0049] The outer tank 1 is fixedly connected to the inner tank 2. The inner tank 2 is located in the outer tank 1. When the heat source component 5 heats the alkali solution in the evaporation chamber 20 in the inner tank 2, the heat is conducted to the outside of the inner tank 2, and the conducted heat enters the outer tank 1. After the drain port 21 is intermittently opened, the liquid in the evaporation chamber 20 is discharged into the outer tank 1. The heat in the outer tank 1 evaporates the discharged alkali solution again, further improving the evaporation effect and increasing the alkali solution concentration ratio.

[0050] The intermittently opened drain port 21 allows the alkali liquid to fully evaporate in the evaporation chamber 20 when the drain port 21 is not opened. When the alkali liquid in the evaporation chamber 20 is fully evaporated, it is discharged into the outer tank 1 through the drain port 21 to evaporate again.

[0051] The bottom of the outer tank 1 is fixedly connected to a drain pipe 11 , on which a valve is installed for discharging the concentrated alkali solution in the outer tank 1 .

[0052] Reference Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 A barrier sleeve 23 is rotatably provided in the inner tank 2, and a corresponding opening 24 corresponding to the drain port 21 is opened on the circumference of the barrier sleeve 23;

[0053] The barrier sleeve 23 is fixedly connected to the outer wall of the main shaft 22 via a connecting rod 231. The rotation of the barrier sleeve 23 is driven by the main shaft 22. During the rotation of the main shaft 22, the barrier sleeve 23, which is in contact with the inner wall of the evaporation chamber 20, blocks the drain port 21, allowing the alkali solution in the evaporation chamber 20 to evaporate in the evaporation chamber 20 for a longer time. When the corresponding port 24 on the barrier sleeve 23 corresponds to the drain port 21, the drain port 21 is connected to the evaporation chamber 20, and the alkali solution in the evaporation chamber 20 is discharged into the outer tank 1.

[0054] By setting the barrier sleeve 23, the intermittent opening of the drain port 21 is controlled, which is safer than the existing electronic component unit control. Electronic components are greatly affected by temperature and are prone to malfunction, resulting in the drain port 21 being unable to open, and the evaporation steam accumulated in the evaporation chamber 20 increasing, causing safety accidents.

[0055] Reference Figure 2 、 Figure 5 、 Figure 7 , a plurality of dispersion plates 25 are fixedly connected to the outer wall of the inner tank 2, and the plurality of dispersion plates 25 respectively correspond to the plurality of evaporation chambers 20 in the inner tank 2. The plurality of dispersion plates 25 have a decreasing distance from the outer wall to the inner tank 2 from top to bottom, and the dispersion plates 25 correspond to the drain ports 21 on the evaporation chambers 20;

[0056] The alkali liquid discharged into the outer tank 1 through the drain port 21 will enter the corresponding dispersion plates 25 respectively. When the liquid level in the dispersion plates 25 exceeds the dispersion plates 25, it will fall from the dispersion plates 25 to the bottom of the outer tank 1. During the falling process of the alkali liquid, the alkali liquid will be dispersed again, further increasing the contact area with the heat in the outer tank 1, further improving the evaporation effect and efficiency of the alkali liquid, and reducing the heat loss.

[0057] Secondly, by arranging the dispersion plate 25 so that the distance between the outer wall and the outer wall of the inner tank 2 decreases from the top to the bottom, it is possible to avoid the falling alkali solution from contacting each other, thereby increasing the dispersion area.

[0058] The device further comprises a negative pressure component for generating negative pressure in the evaporation chamber 20 to reduce the boiling point of the liquid in the evaporation chamber 20 and facilitate evaporation of the alkali solution.

[0059] Reference Figure 1 The negative pressure component includes an eccentric wheel 4 fixedly connected to the main shaft 22 and a piston cylinder 41 fixedly arranged on the outer tank 1. An annular connecting groove is opened on the outer circle of the eccentric wheel 4. A piston rod 42 with a piston at one end is slidably connected to the piston cylinder 41. One end of the piston rod 42 is slidably connected to the annular connecting groove. An exhaust pipe 43 and an exhaust pipe 44 are fixedly connected to the piston cylinder 41 respectively. The exhaust pipe 43 is connected to the evaporation chamber 20 in the inner tank 2.

[0060] The rotation of the main shaft 22 drives the eccentric wheel 4 to rotate, pulling the piston rod 42 back and forth in the piston cylinder 41, and sucking the gas in the evaporation chamber 20 through the exhaust pipe 43, so that the evaporation chamber 20 is under negative pressure, reducing the boiling point of the alkali solution and further improving the evaporation effect;

[0061] When the evaporation chamber 20 is under negative pressure, the drain port 21 is opened, and the air pressure in the outer tank 1, which is greater than the air pressure in the evaporation chamber 20, enters the alkali solution in the evaporation chamber 20 through the drain port 21, causing the alkali solution to bubble and roll, further increasing the contact area between the alkali solution and the heat, thereby improving the evaporation effect;

[0062] It should be understood that when the evaporation chamber 20 is under negative pressure, the drain port 21 is opened, and the alkali solution in the evaporation chamber 20 can be discharged from the drain port 21 into the outer tank 1;

[0063] At the same time, the driving part for driving the eccentric wheel 4 can also adopt a servo motor, and the eccentric wheel 4 is fixedly connected to the output end of the servo motor.

[0064] The eccentric wheel 4 can also be a cam.

[0065] An exhaust pipe 26 is installed on the inner tank 2. The evaporation chambers 20 in the inner tank 2 are respectively connected to the exhaust pipe 26. The exhaust pipe 26 is installed with a relief valve. When the drain port 21 is in a closed state, if the pressure in the evaporation chamber 20 increases abnormally, it will break through the relief valve and be discharged to the outside.

[0066] The end of the exhaust pipe 26 away from the inner tank 2 is connected to the condenser. The steam in the exhaust pipe 26 passes through the condenser to separate the water in the steam, which is convenient for recycling the water. At the same time, one end of the exhaust pipe 44 on the piston cylinder 41 is connected to the exhaust pipe 26 for discharge into the condenser.

[0067] Example 3:

[0068] Reference Figures 1-10 A method for using an evaporation separation system for alkali liquor concentration comprises the following steps:

[0069] S1. The alkali solution to be evaporated is introduced into the evaporation chamber 20 of the inner tank 2, heated by the heat source component 5 in the evaporation chamber 20 to evaporate the water in the alkali solution, and then the alkali solution in the evaporation chamber 20 is ejected from the ejection port 32 of the inner sleeve 3 by the lifting component, so that the alkali solution is diffused in the evaporation chamber 20;

[0070] S2, the alkali liquid sprayed from the spray port 32 contacts the splash plate 33, and the alkali liquid is further dispersed in the evaporation chamber 20 after hitting the splash plate 33. The reciprocating driving component drives the splash plate 33 to reciprocate and change the distance and angle between the alkali liquid and the spray port 32, so that the alkali liquid splashes in the evaporation chamber 20;

[0071] S3, discharging the evaporated alkali solution in the evaporation chamber 20 into the outer tank 1 through the intermittently opened drain port 21, and then evaporating through the outer tank 1;

[0072] S4. The alkali liquid discharged from the liquid discharge port 21 falls into the dispersion plate 25 and sequentially falls from the dispersion plate 25 to the bottom of the outer tank 1. During the falling process, the alkali liquid is evaporated again.

[0073] The present invention arranges an outer tank 1 outside the inner tank 2, and the outer tank 1 is used to absorb the heat dissipated outward by the inner tank 2, collect the heat, and avoid waste. At the same time, a lifting component is provided in the inner tank 2 to lift the alkali liquid in the evaporation chamber 20 upward and spray it onto the splash plate 33 from the spray port 32, so that the alkali liquid is dispersed in the evaporation chamber 20. When the alkali liquid is discharged into the outer tank 1 through the drain port 21, it is evaporated again by the outer tank 1, thereby improving the evaporation efficiency. The heat is collected by the outer tank 1 to avoid heat loss.

[0074] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. An evaporation separation system for alkali liquor concentration, comprising an inner tank (2), characterized in that: The inner tank (2) is provided with a plurality of evaporation chambers (20) for evaporation, and further comprises: An inner sleeve (3) fixedly connected to the evaporation chamber (20) via a mounting rod, wherein a lifting component is provided in the inner sleeve (3) for lifting the liquid in the evaporation chamber (20) toward the top of the inner sleeve (3); A spray outlet (32) is provided on the outer wall of the inner sleeve (3), and the spray outlet (32) is inclined upward. in, When the lifting component lifts the liquid in the evaporation chamber (20) into the inner sleeve (3), the liquid is ejected outward from the ejection port (32); A splash plate (33) is movably arranged at one end in the inner tank (2), and the ejection port (32) corresponds to a side surface of the splash plate (33); A reciprocating driving component disposed in the evaporation chamber (20) for reciprocatingly changing the spacing and angle between the side surface of the splash plate (33) and the ejection port (32); A heat source component (5) disposed in the inner tank (2) is used to increase the temperature in the evaporation chamber (20); It also includes: an outer tank (1) arranged outside the inner tank (2), a plurality of intermittently opened drainage ports (21) being provided on the circumference of the inner tank (2), the drainage ports (21) allowing the evaporation chamber (20) in the inner tank (2) to be intermittently connected to the outer tank (1); A barrier sleeve (23) is rotatably provided in the inner tank (2), and a corresponding opening (24) corresponding to the liquid discharge opening (21) is provided on the circumference of the barrier sleeve (23). A main shaft (22) is rotatably connected in the inner tank (2), and the main shaft (22) is fixedly connected to the output end of the motor (221), thereby driving the main shaft (22) to rotate in the inner tank (2). The barrier sleeve (23) is fixedly connected to the outer wall of the main shaft (22) via a connecting rod (231); It also includes: a negative pressure component, used to generate negative pressure in the evaporation chamber (20) to reduce the evaporation boiling point of the liquid in the evaporation chamber (20); The negative pressure component comprises an eccentric wheel (4) fixedly connected to the main shaft (22) and a fixed piston cylinder (41); an annular connecting groove is provided on the outer circle of the eccentric wheel (4); a piston rod (42) with a piston at one end is slidably connected in the piston cylinder (41); one end of the piston rod (42) is slidably connected in the annular connecting groove; an exhaust pipe (43) and an exhaust pipe (44) are fixedly connected to the piston cylinder (41); the exhaust pipe (43) is respectively connected to the evaporation chamber (20) in the inner tank (2).

2. The evaporation separation system for alkali liquor concentration according to claim 1, characterized in that: The lifting component comprises a spiral conveying piece (31), and the spiral conveying piece (31) is rotatably arranged in the inner sleeve (3), and a gap is left between the inner sleeve (3) and the bottom wall of the evaporation chamber (20).

3. The evaporation separation system for alkali liquor concentration according to claim 1, characterized in that: The reciprocating drive component includes a connecting plate (35), a protruding rod (36) is fixedly connected to the connecting plate (35), a plurality of mounting blocks (331) are fixedly connected to the inner wall of the inner tank (2), one end of the splash plate (33) is rotatably connected to the mounting block (331), the splash plate (33) is fixedly connected to the top wall of the evaporation chamber (20) via a spring (34), and the protruding rod (36) corresponds to the side of the splash plate (33) close to the ejection outlet (32).

4. The evaporation separation system for alkali liquor concentration according to claim 3, characterized in that: Both sides of the connecting plate (35) are fixedly connected with arc-shaped connecting plates (351), and the arc-shaped connecting plates (351) correspond to the protruding rods (36).

5. The evaporation separation system for alkali liquor concentration according to claim 1, characterized in that: A plurality of dispersion plates (25) are fixedly connected to the outer wall of the inner tank (2), and the plurality of dispersion plates (25) respectively correspond to the plurality of evaporation chambers (20) in the inner tank (2). The spacing between the plurality of dispersion plates (25) and the outer wall of the inner tank (2) decreases from top to bottom, and the dispersion plates (25) correspond to the liquid discharge ports (21) on the evaporation chambers (20).

6. A method for using the evaporation separation system for alkali liquor concentration according to claim 5, characterized in that: The main steps include: S1, introducing the alkali solution to be evaporated into the evaporation chamber (20) of the inner tank (2), heating it through the heat source component (5) in the evaporation chamber (20), evaporating the water in the alkali solution, and then ejecting the alkali solution in the evaporation chamber (20) from the ejection port (32) of the inner sleeve (3) through the lifting component, so that the alkali solution is diffused in the evaporation chamber (20); S2, the alkali liquid sprayed from the spray port (32) contacts the splash plate (33), and the alkali liquid is further dispersed in the evaporation chamber (20) after hitting the splash plate (33), and the splash plate (33) is driven by the reciprocating driving component to reciprocate and change the distance and angle between the splash plate and the spray port (32), so that the alkali liquid splashes in the evaporation chamber (20); S3, discharging the evaporated alkali solution in the evaporation chamber (20) into the outer tank (1) through the intermittently opened drain port (21), and then evaporating through the outer tank (1); S4. The alkali liquid discharged from the liquid discharge port (21) falls into the dispersion plate (25) and then falls from the dispersion plate (25) to the bottom of the outer tank (1). During the falling process, the alkali liquid is evaporated again.

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