Soda evaporation device

Abstract

This application provides a soda ash evaporation device, including a heat exchange tube, a cleaning unit, and a driving unit. The cleaning unit is located inside the heat exchange tube and includes a brush. The driving unit is located below the heat exchange tube and includes a collection box. The collection box has two collection troughs located on both sides of its hinge axis, which can alternately collect the soda ash flowing out of the heat exchange tube. The collection box is configured such that when the collection box swings under the gravity of the soda ash in the collection troughs, it can drive the brush to move up and down along the axial direction of the heat exchange tube in a rotating manner, and the brush bristles swing outward under the action of centrifugal force until they contact the inner wall of the heat exchange tube. This application optimizes and improves the existing falling film evaporator, and can use the soda ash flowing into the heat exchange tube as a power source to drive the brush to intermittently clean the inner wall of the heat exchange tube, avoiding the heat exchange capacity being affected by the dirt adhering to the inner wall of the heat exchange tube.

Description

Technical Field

[0001] This application relates to the field of soda ash preparation technology, and more specifically, to a soda ash evaporation apparatus. Background Technology

[0002] Falling film evaporators are commonly used equipment for producing soda ash. Their principle is as follows: the soda ash solution flows from the top distribution tube into the heat exchange tubes inside the evaporation cylinder, and flows downwards along the inner wall of the tubes, forming a thin film. Due to the high temperature of the tube walls, some of the solvent in the soda ash solution is vaporized during the flow, thereby increasing the concentration of the solute in the soda ash solution. The evaporated soda ash solution flows from the heat exchange tubes into the lower settling cylinder. However, because the soda ash solution contains impurities, the inner wall of the heat exchange tubes can become contaminated, affecting the heat exchange capacity. If the contaminants are not cleaned in time, the effective vaporization and evaporation of the soda ash solution will be affected. Therefore, the inventors have proposed a soda ash evaporation device. Summary of the Invention

[0003] The purpose of this application is to provide a soda ash evaporation device that uses the soda ash solution flowing into the heat exchange tube as a power source to drive a brush to intermittently clean the inner wall of the heat exchange tube, thereby avoiding the heat exchange capacity of the heat exchange tube being affected by the dirt adhering to the inner wall.

[0004] The embodiments of this application are implemented as follows:

[0005] This application provides a soda ash evaporation device, including a heat exchange tube, a cleaning unit, and a drive unit. The cleaning unit is located inside the heat exchange tube and includes a brush. The drive unit is located below the heat exchange tube and includes a collection box. The collection box has two collection tanks located on both sides of its hinge axis, which can alternately receive the soda ash flowing out through the heat exchange tube. The collection box is configured such that when the collection box swings under the gravity of the soda ash in the collection tank, it can drive the brush to move up and down along the axial direction of the heat exchange tube in a rotating manner, and cause the brush bristles to swing outward under the action of centrifugal force until they contact the inner wall of the heat exchange tube.

[0006] This application optimizes and improves the existing falling film evaporator by adding a brush that can move back and forth inside the heat exchange tube to clean the inner wall of the heat exchange tube. With the designed liquid collection box, the alkaline solution flowing into the heat exchange tube can be used as a power source to drive the brush to clean the inner wall of the heat exchange tube intermittently, thus avoiding the heat exchange capacity being affected by the dirt adhering to the inner wall of the heat exchange tube.

[0007] In an optional embodiment, the cleaning unit further includes a support rod arranged coaxially with the heat exchange tube. The support rod has a groove extending spirally along the axial direction on its circumferential surface. A brush is sleeved on the outside of the support rod, and a pin with its inner end engaged with the groove is fixed on the brush.

[0008] In an optional implementation, the pins are arranged radially along the brush.

[0009] In an optional embodiment, a connecting rod is fixed between the support rod and the heat exchange tube.

[0010] In an alternative embodiment, the connecting rod is arranged radially along the support rod.

[0011] In an optional embodiment, the drive unit further includes a connecting plate sleeved on the outside of the support rod. The connecting plate is rotatably connected to the lower end face of the brush. A connecting plate is fixedly connected to the bottom of the connecting plate. The connecting plate is slidably engaged in the limiting groove on the support rod. The connecting plate is fixedly connected to a lifting rod inserted into the support rod. A transmission plate is hinged between the lifting rod and the partition in the liquid collection box.

[0012] In an optional embodiment, the lower end of the partition is located on the rotation axis of the liquid collection box.

[0013] In an optional embodiment, the lower end face of the brush is provided with an annular groove, the groove is T-shaped along the cross section, and a clamping head adapted to the groove is fixedly connected to the top surface of the connecting disc.

[0014] In an optional embodiment, the limiting groove extends along the axis of the support rod and is symmetrically arranged on both sides of the support rod.

[0015] In an optional embodiment, a slide rail arranged along the longitudinal direction is fixed to the bottom of the liquid collection box, and a rollable counterweight ball is provided inside the slide rail. Attached Figure Description

[0016] Exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments described below are for illustrative purposes only and are not intended to limit the scope of this application. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of a soda ash evaporation apparatus according to an embodiment of this application;

[0018] Figure 2 This is an installation diagram of the drive unit according to an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of a liquid collection box according to an embodiment of this application;

[0020] Figure label:

[0021] 10. Liquid distribution cylinder;

[0022] 20. Evaporator;

[0023] 30. Sinking tube;

[0024] 40. Heat exchanger tubes;

[0025] 50. Cleaning unit;

[0026] 60. Drive unit;

[0027] 11. Liquid inlet;

[0028] 21. Steam inlet;

[0029] 22. Condensate outlet;

[0030] 23. Separator layer;

[0031] 31. Steam outlet;

[0032] 32. Liquid outlet;

[0033] 51. Brush;

[0034] 52. Support rod;

[0035] 53. Connecting rod;

[0036] 231. Mounting plate;

[0037] 232. Baffle;

[0038] 511. Pin;

[0039] 512. Brush bristles;

[0040] 521. Slide groove;

[0041] 522. Limiting groove;

[0042] 61. Liquid collection box;

[0043] 62. Transmission plate;

[0044] 63. Lifting boom;

[0045] 64. Connecting plate;

[0046] 65. Connecting disk;

[0047] 611. Liquid collection tank;

[0048] 612. Partition;

[0049] 613. Slide;

[0050] 614. Counterweight ball;

[0051] 615. Hinge shaft;

[0052] 616. Connecting shaft;

[0053] 651. Card Header. Detailed Implementation

[0054] Example 1

[0055] Please see Figures 1-3 This embodiment provides a soda ash evaporation device to solve the problem of reduced heat exchange capacity caused by dirt adhering to the inner wall of the heat exchange tube in existing falling film evaporators. It uses the alkaline solution flowing out of the heat exchange tube as power to drive the brush to move intermittently up and down inside the heat exchange tube, thereby cleaning the inner wall of the heat exchange tube.

[0056] In this embodiment, the soda ash evaporation device includes a heat exchange tube 40, a cleaning unit 50, and a drive unit 60. The cleaning unit 50 is located inside the heat exchange tube 40 and includes a brush 51. The drive unit 60 is located below the heat exchange tube 40 and includes a collection box 61. The collection box 61 has two collection tanks 611 located on both sides of its hinge shaft 615, which can alternately receive the soda ash flowing out through the heat exchange tube 40. The collection box 61 is configured such that when the collection box 61 swings under the gravity of the soda ash in the collection tank 611, it can drive the brush 51 to move up and down along the axial direction of the heat exchange tube 40 in a rotating manner, and make the bristles 511 of the brush swing outward under the action of centrifugal force until they contact the inner wall of the heat exchange tube 40.

[0057] This embodiment optimizes and improves the existing falling film evaporator by adding a brush 51, which can move up and down in a rotating manner inside the heat exchange tube 40 to clean the inner wall of the heat exchange tube 40. With the designed liquid collection box 61, the alkaline solution flowing into the heat exchange tube 40 can be used as a power source to drive the brush 51 to intermittently clean the inner wall of the heat exchange tube 40, thus avoiding the heat exchange capacity of the heat exchange tube 40 being affected by dirt adhering to the inner wall.

[0058] It should be noted that the overall structure of the soda ash evaporation device in this embodiment includes a liquid distribution cylinder 10, an evaporation cylinder 20, and a sinking cylinder 30 arranged sequentially from top to bottom. Adjacent cylinders are separated by a partition layer 23. This structure is largely the same as the overall structure of existing falling film evaporators. The heat exchange tube 50 is vertically arranged inside the evaporation cylinder 20 and enables communication between the liquid distribution cylinder 10 and the sinking cylinder 30. An inlet 11 is provided at the top of the liquid distribution cylinder 10. At the same time, a liquid distributor (existing technology, not shown in the figure) is also provided inside the liquid distribution cylinder 10. The alkali solution enters the liquid distribution cylinder 10 through the inlet 11. Under the action of the liquid distributor... The alkaline solution flows downward into the heat exchange tube 50 and forms a water film on the inner wall of the heat exchange tube 50. After evaporation in the heat exchange tube 50, the alkaline solution flows downward into the sinking cylinder 30 and is finally discharged from the liquid outlet 32 ​​at the bottom. A steam inlet 21 and a condensate outlet 22 are provided on the side wall of the evaporator cylinder 20. Steam is sent into the evaporator 20 through the steam inlet 21 and evaporates the alkaline solution through the heat exchange of the heat exchange tube 50. The condensate generated inside the evaporator cylinder 20 is discharged through the condensate outlet 22. A steam outlet 31 is provided on the side wall of the sinking cylinder 30. The steam generated by the evaporation of the alkaline solution inside the heat exchange tube 50 is discharged through the steam outlet 31.

[0059] It should also be noted that, in this embodiment, the cleaning unit 50 further includes a support rod 52 arranged coaxially with the heat exchange tube 40. Both the upper and lower ends of the support rod 52 are fixedly connected to the inner wall of the heat exchange tube 40 through connecting rods 53. The connecting rods 53 are arranged radially along the support rod 52. The circumferential surface of the support rod 52 is provided with a sliding groove 521 extending spirally along the axial direction. The brush 51 is sleeved on the outside of the support rod 52. A pin 511 with its inner end engaged with the sliding groove 521 is fixedly connected to the brush 51. The pin 511 is arranged radially along the brush. By utilizing the sliding engagement between the pin 511 and the sliding groove 521, the brush 51 can move up and down along the axial direction of the support rod 52 in a rotating manner.

[0060] It is particularly important to note that the brush 51 has bristles 512 on its circumferential surface. The bristles 512 are arranged in multiple rows along the circumference of the brush 51, and each row of bristles 512 is arranged along the axial direction of the brush 51. The bristles 512 hang down in their natural state, so that a certain gap is formed between the bristles 512 and the inner wall of the heat exchange tube 40. When the brush 51 rotates, the movable end of the bristles 512 will swing outward under the action of centrifugal force, thereby contacting the inner wall of the heat exchange tube 40.

[0061] In addition, the drive unit 60 in this embodiment also includes a connecting plate 65 sleeved on the outside of the support rod 52. The connecting plate 65 is rotatably connected to the lower end face of the brush 51. An annular groove is provided on the lower end face of the brush 51. The groove is T-shaped along the cross section. A T-shaped clamp head 651 adapted to the groove is fixedly connected to the top surface of the connecting plate 65. A connecting plate 64 is fixedly connected to the bottom of the connecting plate 65. The connecting plate 64 is slidably engaged in the limiting groove 522 on the support rod 52. The limiting groove 522 extends along the axis of the support rod 52 and is symmetrically arranged on both sides of the support rod 52. The connecting plate 64 is fixedly connected to the lifting rod 63 inserted into the support rod 52. A transmission plate 62 is hinged between the lifting rod 63 and the partition 612 in the liquid collection box 61.

[0062] It should be understood that by utilizing the sliding engagement between the connecting plate 64 and the limiting groove 522, the connecting plate 65 is only allowed to slide along the axial direction of the support rod 52 under the drive of the connecting plate 64, thus preventing the connecting plate 65 from rotating the support rod 52. By utilizing the rotational connection between the connecting plate 65 and the brush 51, when the brush 51 moves up and down synchronously along the axial direction of the support rod 52 with the connecting plate 65, the sliding engagement between the pin 511 and the slide groove 521 allows the brush 51 to move up and down along the axial direction of the support rod 52 in a rotational manner.

[0063] Furthermore, in this embodiment, the liquid collection box 61 is constructed in a U-shape along its cross-section. A partition 612 is positioned at the center of the liquid collection box 61's longitudinal direction. The partition 612 divides the U-shaped groove defined by the liquid collection box 61 into two symmetrical and independent liquid collection channels 611. The top of the partition 612 is provided with a connecting shaft 616 for hinged connection to the lower end of the transmission plate 62. The upper end of the transmission plate 62 is hinged to the lower end of the lifting rod 63. The liquid collection box 61 is pivotally hinged below the heat exchange tube 40. For example, along the width of the liquid collection box 61… Hinges 615 are fixed to the two outer side walls in the direction of the liquid collection box 61, and the lower end of the partition plate 612 is located on the rotation axis of the liquid collection box 61. The hinges 615 are hinged to the hanging plate 231 fixed to the lower surface of the partition layer 23, so that the liquid collection box 61 can be suspended below the heat exchange tube 40 by swinging left and right. In order to limit the swing angle of the liquid collection box 61, a baffle 232 is fixed to the inner side wall of the hanging plate 231. When the liquid collection box 61 swings to a certain angle, the baffle 232 will contact the side wall of the liquid collection box 31, which will play a blocking and limiting role.

[0064] It should be noted that when the liquid collection box 61 is in a horizontal state, the partition 612, the hanging plate 231, the lifting rod 63 and the support rod 52 are all located in the same vertical plane.

[0065] To make the liquid collection box 61 swing more smoothly, a slide 613 arranged along its longitudinal direction is fixedly connected to the bottom of the liquid collection box 61, and a rolling counterweight ball 614 is provided inside the slide 613. When the liquid collection box 61 swings to a certain side, the counterweight ball 614 will roll to the same side under the action of gravity.

[0066] In use, under the action of the counterweight ball 614, the liquid collection box 61 is in an inclined state. The liquid collection tank 611 on the upper side will receive the alkaline solution flowing out of the heat exchange tube 40. When a certain amount of alkaline solution accumulates inside the liquid collection tank 611, it can overcome the gravity of the counterweight ball 614, causing the liquid collection box 61 to swing. At this time, the alkaline solution will flow out from the inside of the liquid collection tank 611 into the sink cylinder 30, and the counterweight ball 614 will roll in the same direction as the alkaline solution, causing the other liquid collection tank 611 to swing upward, so as to alternately receive the alkaline solution flowing out of the heat exchange tube 40; when the partition plate 612 When the liquid collection box 61 swings synchronously, the partition 612 is actually rotating around the hinge shaft 615. The top of the partition 612 swings from one side of the heat exchange tube 40 to the opposite side, thereby driving the brush 51 to complete a rotational up-and-down reciprocating movement inside the heat exchange tube 40 through the transmission plate 62. Since the liquid collection box 61 swings periodically left and right, the brush 51 can eventually move up and down along the axis of the heat exchange tube 40 intermittently in a rotational manner, and use the friction of the bristles 512 to complete the cleaning of the inner wall of the heat exchange tube 40.

[0067] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A soda ash evaporation apparatus, characterized in that, The system includes a heat exchange tube, a cleaning unit, and a drive unit. The cleaning unit is located inside the heat exchange tube and includes a brush. The drive unit is located below the heat exchange tube and includes a collection box. The collection box has two collection troughs on either side of its hinge axis, which alternately collect the alkaline solution flowing out of the heat exchange tube. The collection box is configured such that when it swings under the gravity of the alkaline solution in the collection troughs, it drives the brush to move up and down along the axial direction of the heat exchange tube in a rotating manner, causing the brush bristles to swing outward under centrifugal force until they contact the inner wall of the heat exchange tube. The cleaning unit also includes a support rod arranged coaxially with the heat exchange tube. The peripheral surface is provided with a spiral groove extending in an axial direction. The brush is sleeved on the outside of the support rod. A pin with its inner end engaged with the groove is fixed to the brush. The drive unit also includes a connecting plate sleeved on the outside of the support rod. The connecting plate is rotatably connected to the lower end face of the brush. A connecting plate is fixed below the connecting plate. The connecting plate is slidably engaged in a limiting groove on the support rod. The connecting plate is fixed to a lifting rod inserted into the support rod. A transmission plate is hinged between the lifting rod and a partition in the liquid collection box. The lower end of the partition is located on the rotation axis of the liquid collection box. A slide rail arranged along its longitudinal direction is fixed below the liquid collection box. A rolling counterweight ball is provided inside the slide rail.

2. The soda ash evaporation apparatus as described in claim 1, characterized in that, The pins are arranged radially along the brush.

3. The soda ash evaporation apparatus as described in claim 1, characterized in that, A connecting rod is fixedly connected between the support rod and the heat exchange tube.

4. The soda ash evaporation apparatus as described in claim 3, characterized in that, The connecting rod is arranged radially along the support rod.

5. The soda ash evaporation apparatus as described in claim 1, characterized in that, The lower end face of the brush is provided with an annular groove, the groove is T-shaped along the cross section, and a clamping head adapted to the groove is fixedly connected to the top surface of the connecting plate.

6. The soda ash evaporation apparatus as described in claim 1, characterized in that, The limiting groove extends along the axis of the support rod, and the limiting groove is symmetrically arranged on both sides of the support rod.

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