Vertical scraper film evaporator

Abstract

The utility model relates to a vertical scraper film evaporator which comprises an evaporation tank and a plurality of heating cavities annularly arranged in the wall surface of the evaporation tank, and electric heating rings are arranged in the heating cavities; the bottom of the evaporation tank is connected with a discharge pipe; the upper part in the evaporation tank is rotationally connected with a material scattering assembly, and the bottom of the material scattering assembly is provided with a scraper assembly; a motor is mounted on the outer wall surface of the evaporation tank, and a transmission assembly is mounted on an output shaft of the motor; the evaporation tank is also provided with a feeding pipe; and the top of the evaporation tank is connected with a steam recycling assembly. The inner wall of the evaporation tank is heated through the electric heating ring, evaporated liquid is sprayed to the inner wall of the evaporation tank through the material scattering assembly and is leveled by the scraper assembly to be laid on the inner wall of the evaporation tank, a thin film with good continuity is formed for rapid evaporation, and the thin film is not prone to being broken.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporators, in particular to a vertical scraper thin film evaporator. Background Art

[0002] A vertical scraped film evaporator is a highly efficient evaporation device primarily composed of a heating jacket and scrapers, suitable for evaporating a wide variety of materials. Its operating principle is that the feed liquid is added tangentially from the top of the evaporator. Driven by gravity and the rotating scrapers, a thin film forms along the inner wall of the shell, forming a downward-spinning film. The finished liquid is discharged from the bottom, while the secondary steam passes through a demister and is discharged from the top.

[0003] In the current vertical scraper film evaporator, the material is scattered onto the rotating scraper by gravity, and the rotating scraper throws the material to the inner wall of the heating jacket to form a downward rotating film for rapid evaporation. The formation of this film is generally not continuous, and the high-temperature steam is directly discharged, and the steam heat is not effectively utilized. Utility Model Content

[0004] The purpose of the utility model is to provide a vertical scraped film evaporator to solve the problems of steam waste and film continuity mentioned in the above background technology.

[0005] The utility model provides the following technical solution: a vertical scraper thin film evaporator, which includes an evaporation tank and a plurality of heating chambers arranged in a circle from top to bottom within the wall surface of the evaporation tank, each heating chamber being equipped with an electric heating ring; a discharge pipe being connected to the bottom of the evaporation tank; a material spreading assembly being rotatably connected to the upper portion of the evaporation tank, a scraper assembly being installed at the bottom of the material spreading assembly, the scraper assembly being in contact with the inner wall surface of the evaporation tank;

[0006] The outer wall of the evaporator is equipped with a motor, and the output shaft of the motor is equipped with a transmission assembly, which is connected to the material spreading assembly so that the motor drives the material spreading assembly to rotate through the transmission assembly;

[0007] The evaporation tank is also equipped with a feed pipe, the end of which penetrates the evaporation tank and is connected to the material spreading assembly and is rotatably connected;

[0008] The top of the evaporation tank is connected with a steam recovery and utilization component.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] 1. The utility model heats the inner wall of the evaporation tank through an electric heating ring. The evaporating liquid is sprinkled onto the inner wall of the evaporation tank by the spreading assembly and flattened on the inner wall of the evaporation tank by the scraper assembly, forming a continuous film for rapid evaporation, and the film is not easy to break.

[0011] 2. The steam generated by evaporation rises and enters the steam recovery component. The steam flows and is discharged in the steam recovery component. During the flow, the steam contacts the feed pipe and exchanges heat with the evaporating liquid in the feed pipe, which preheats the evaporating liquid in advance, helping to improve the subsequent evaporation effect and the recovery and utilization of the steam heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a cross-sectional structural diagram of the utility model;

[0013] Figure 2 This is an external structural diagram of the utility model;

[0014] Figure 3 This is a structural diagram of the spreading assembly and transmission assembly of the utility model;

[0015] Figure 4 This is a structural diagram of the steam recovery and utilization component of the present utility model;

[0016] Figure 5 This is a structural diagram of the scraper assembly of the present utility model.

[0017] In the figure: 1. Evaporation tank; 2. Electric heating ring; 3. Discharge pipe; 4. Transverse partition; 5. Spreading assembly; 501. Rotating pipe; 502. Spreading pipe; 6. Motor; 7. Transmission assembly; 701. Driving wheel; 702. Driven wheel; 703. Belt; 8. Feed pipe; 9. Steam recovery assembly; 901. Exhaust pipe; 902. Heating shell; 903. Heat conduction plate; 904. Discharge pipe; 10. Scraper assembly; 1001. Rotating rod; 1002. Scraper. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] like Figure 1-5 As shown, a vertical scraped film evaporator comprises an evaporation tank 1 and a plurality of heating chambers arranged in a circle from top to bottom within the wall of the evaporation tank 1. An electric heating ring 2 is installed in each heating chamber. A discharge pipe 3 is connected to the bottom of the evaporation tank 1. A material spreading assembly 5 is rotatably connected to the upper portion of the evaporation tank 1. A scraper assembly 10 is installed at the bottom of the material spreading assembly 5, and the scraper assembly 10 contacts the inner wall of the evaporation tank 1.

[0020] The outer wall of the evaporation tank 1 is equipped with a motor 6, and the output shaft of the motor 6 is equipped with a transmission assembly 7, which is connected to the material spreading assembly 5, so that the motor 6 drives the material spreading assembly 5 to rotate through the transmission assembly 7;

[0021] The evaporation tank 1 is also equipped with a feed pipe 8, the end of which penetrates the evaporation tank 1 and is connected to the material spreading assembly 5 and is rotatably connected;

[0022] A steam recovery component 9 is connected to the top of the evaporation tank 1 .

[0023] It should be noted here that the inner wall of the evaporation tank 1 can be heated by the electric heating ring 2, and the evaporating liquid enters the spreading assembly 5 through the feed pipe 8. The motor 6 can drive the spreading assembly 5 to rotate through the transmission assembly 7, and directly rotate the evaporating liquid to the inner wall of the evaporation tank 1. The evaporating liquid is sprinkled on the inner wall of the evaporation tank 1 to form a water curtain and flows downward. The rotation of the spreading assembly 5 drives the scraper assembly 10 to rotate. The scraper assembly 10 scoops up the water curtain flowing downward on the inner wall of the evaporation tank 1 and flattens the water droplets on the inner wall of the evaporation tank 1 to form a thin film for rapid evaporation. The film has good continuity and is not easy to break. The vapor generated by evaporation rises and enters the steam recovery assembly 9. The vapor flows and is discharged in the steam recovery assembly 9. During the flow, the vapor contacts the feed pipe 8 and exchanges heat with the evaporating liquid in the feed pipe 8, thereby preheating the evaporating liquid in advance, which helps to improve the subsequent evaporation effect and the recovery and utilization of the steam heat.

[0024] Furthermore, the material spreading assembly 5 includes a rotating pipe 501 and a plurality of material spreading pipes 502 connected to the outer periphery of the rotating pipe 501 and distributed at equal intervals, and the material spreading pipes 502 are connected to the rotating pipe 501;

[0025] A transverse partition 4 is fixedly connected to the upper portion of the evaporation tank 1 . A limiting hole is provided in the middle of the transverse partition 4 . The rotating tube 501 passes through the limiting hole and is rotatably connected to the transverse partition 4 .

[0026] It should be noted here that: the evaporative liquid enters the rotating tube 501 through the feed pipe 8, and the motor 6 can drive the rotating tube 501 to rotate through the transmission assembly 7, so that the evaporative liquid is sprinkled on the inner wall of the evaporation tank 1 through the spreading pipe 502, wherein the transverse partition 4 is used to support the rotating tube 501 at the upper part of the evaporation tank 1, thereby enabling the entire spreading assembly 5 to maintain its position and not be thrown out of line by the inertial force during rotation.

[0027] Furthermore, the scraper assembly 10 includes a rotating rod 1001 and a plurality of scrapers 1002 distributed in an annular array around the outer periphery of the rotating rod 1001 and connected to the rotating rod 1001;

[0028] The top end of the rotating rod 1001 is fixedly connected to the bottom end of the rotating tube 501 ; the scraper 1002 contacts the inner wall surface of the evaporation tank 1 .

[0029] It should be noted that the rotating rod 1001 can be driven by the rotating tube 501, thereby driving the scraper 1002 to rotate. The scraper 1002 scoops up the water curtain flowing downward on the inner wall of the evaporation tank 1 and spreads the water droplets flat on the inner wall of the evaporation tank 1 to form a thin film for rapid evaporation.

[0030] Furthermore, the transmission assembly 7 includes a driving wheel 701 mounted on the output shaft of the motor 6 , a driven wheel 702 mounted on the rotating tube 501 , and a belt 703 connected between the driving wheel 701 and the driven wheel 702 .

[0031] It should be noted that the motor 6 can drive the driving wheel 701 to rotate, thereby driving the belt 703 and the driven wheel 702 to rotate, and further driving the rotating tube 501 to rotate.

[0032] Furthermore, the steam recovery and utilization component 9 includes an outlet pipe 901, a heating shell 902, and a discharge pipe 904 connected in sequence; the heating shell 902 is wrapped around the outer periphery of the feed pipe 8, and a plurality of heat conducting plates 903 are provided between the feed pipe 8 and the heating shell 902; wherein, the end of the outlet pipe 901 is connected to the top of the evaporation tank 1 and communicates with the interior of the evaporation tank 1.

[0033] It should be noted here that: steam enters the outlet pipe 901 from the evaporator 1, and then enters the heating shell 902, and preheats the evaporating liquid flowing in the feed pipe 8 through the heat conduction plate 903 and the feed pipe 8 as a heat conduction medium.

[0034] Furthermore, a portion of the heat conducting plate 903 is inserted into the feed pipe 8, which can help improve the heat conducting effect.

[0035] Working Principle: The inner wall of the evaporator 1 is heated by the electric heating ring 2. The evaporating liquid enters the rotating tube 501 through the feed pipe 8. The motor 6 drives the driving wheel 701 to rotate, which in turn drives the belt 703 and the driven wheel 702 to rotate, and then drives the rotating tube 501 to rotate. The evaporating liquid rotates through the spreading pipe 502 and is sprayed onto the inner wall of the evaporator 1.

[0036] When the evaporating liquid is sprinkled on the inner wall of the evaporation tank 1 to form a water curtain flowing downward, the rotating rod 1001 rotating together with the rotating tube 501 can drive the scraper 1002 to rotate. The scraper 1002 will scoop up the water curtain flowing downward on the inner wall of the evaporation tank 1 and spread the water droplets flat on the inner wall of the evaporation tank 1 to form a thin film for rapid evaporation. The formed film has good continuity and is not easy to break.

[0037] The steam will flow upward from the evaporator 1 into the exhaust pipe 901, and then into the heating shell 902. Through the heat conducting plate 903 and the feed pipe 8 as a heat conducting medium, it will exchange heat with the evaporating liquid in the feed pipe 8, thereby preheating the evaporating liquid in advance, which will help improve the subsequent evaporation effect and recover the heat of the steam.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A vertical scraped film evaporator, characterized in that: It comprises an evaporation tank (1) and a plurality of heating chambers arranged in a ring from top to bottom on the wall surface of the evaporation tank (1), each heating chamber being provided with an electric heating ring (2); a discharge pipe (3) being connected to the bottom of the evaporation tank (1); a spreading assembly (5) being rotatably connected to the upper portion of the evaporation tank (1), a scraper assembly (10) being provided at the bottom of the spreading assembly (5), and the scraper assembly (10) being in contact with the inner wall surface of the evaporation tank (1); The outer wall surface of the evaporation tank (1) is mounted with a motor (6), and the output shaft of the motor (6) is mounted with a transmission assembly (7), and the transmission assembly (7) is connected to the material spreading assembly (5), so that the motor (6) drives the material spreading assembly (5) to rotate through the transmission assembly (7); The evaporation tank (1) is also provided with a feed pipe (8), the end of which penetrates into the evaporation tank (1) and is connected to the material spreading assembly (5) and is rotatably connected thereto; The top of the evaporation tank (1) is connected to a steam recovery component (9).

2. A vertical scraped thin film evaporator according to claim 1, characterized in that: The material spreading assembly (5) comprises a rotating pipe (501) and a plurality of material spreading pipes (502) connected to the outer periphery of the rotating pipe (501) and distributed at equal intervals, wherein the material spreading pipes (502) are in communication with the rotating pipe (501); A transverse partition (4) is fixedly connected to the upper portion of the evaporation tank (1), a limiting hole is provided in the middle portion of the transverse partition (4), and the rotating tube (501) passes through the limiting hole and is rotatably connected to the transverse partition (4).

3. The vertical scraped film evaporator according to claim 2, characterized in that: The scraper assembly (10) comprises a rotating rod (1001) and a plurality of scrapers (1002) distributed in an annular array on the periphery of the rotating rod (1001) and connected to the rotating rod (1001); The top end of the rotating rod (1001) is fixedly connected to the bottom end of the rotating tube (501); and the scraper (1002) is in contact with the inner wall surface of the evaporation tank (1).

4. The vertical scraped thin film evaporator according to claim 1, characterized in that: The transmission assembly (7) comprises a driving wheel (701) mounted on the output shaft of the motor (6), a driven wheel (702) mounted on the rotating tube (501), and a belt (703) connected between the driving wheel (701) and the driven wheel (702).

5. The vertical scraped thin film evaporator according to claim 1, characterized in that: The steam recovery and utilization component (9) comprises an outlet pipe (901), a heating shell (902), and a discharge pipe (904) connected in sequence; the heating shell (902) is wrapped around the outer periphery of the feed pipe (8), and a plurality of heat conduction plates (903) are provided between the feed pipe (8) and the heating shell (902); wherein the end of the outlet pipe (901) is connected to the top of the evaporation tank (1) and communicates with the interior of the evaporation tank (1).

6. The vertical scraped thin film evaporator according to claim 5, characterized in that: Part of the structure of the heat conducting plate (903) is inserted into the feed pipe (8).

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