A low-temperature methanol washing ammonia separation system

Abstract

This invention relates to the field of chemical production technology, and in particular to a separation device for a low-temperature methanol-ammonia washing system. The device includes a heat exchanger, a heater, and a separation unit. The heat exchanger is pipe-connected to the separation unit, and the heater provides heat energy to the separation unit. The separation unit includes a separation chamber with an open box on one side of its lower end. A partition is fixed to the inner wall of the middle section of the separation chamber. The separation chamber, the open box, and the partition together form a communicating vessel for storing liquid. Two synchronously swinging drive arms are located at the bottom of the communicating vessel. A collection box for collecting impurities is also provided inside the communicating vessel. When the drive arms rotate, the collection box can move to both ends of the communicating vessel. This invention reduces ammonia loss and environmental pollution. It also effectively removes impurities while recovering ammonia, ensuring the quality of ammonia in the ammonia system and saving ammonia consumption.

Description

Technical Field

[0001] This invention relates to the field of chemical production technology, and in particular to a separation device for a low-temperature methanol washing ammonia system. Background Technology

[0002] In the operation of an ammonia system using low-temperature methanol washing ammonia as a refrigerant, impurities accumulate at the bottom of the ammonia heat exchanger. If these impurities are not discharged for a long time, they will affect the quality of the ammonia. Therefore, it is necessary to discharge the impurities, but this discharge will also result in some waste of ammonia. The existing technology involves direct discharge from the ammonia drain of the heat exchanger, which will cause a large loss of ammonia and pollute the environment. To address these issues, a low-temperature methanol washing ammonia system separation device is designed to solve the problems mentioned above. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a low-temperature methanol-ammonia washing system separation device. This device can introduce ammonia and impurities discharged from the ammonia heat exchanger into an ammonia impurity separator during ammonia drainage, heating the ammonia and returning the gaseous ammonia to the ammonia system. This reduces ammonia loss and environmental pollution. Furthermore, the device effectively removes impurities while simultaneously recovering ammonia, ensuring ammonia quality in the system and conserving ammonia resources. This effectively solves the problems mentioned in the background section.

[0004] The technical solution adopted by the present invention to solve the above problems is as follows:

[0005] A low-temperature methanol-ammonia washing system separation device includes a heat exchanger, a heater, and a separation device. The heat exchanger is pipe-connected to the separation device, and the heater provides heat energy to the separation device. The separation device includes a separation box with an open box on one side of the lower end. A partition is fixed to the inner wall of the middle of the separation box. The separation box, the open box, and the partition together form a communicating vessel for storing liquid. Two synchronously swinging drive arms are provided at the bottom of the communicating vessel. A collection box for collecting impurities is also provided inside the communicating vessel. When the drive arms rotate, the collection box can move to both ends of the communicating vessel.

[0006] The separation chamber is equipped with heating pipes that are coiled on the inner wall of the separation chamber, and the heating pipes are connected to the heater.

[0007] The bottom of the communicating vessel is fixedly connected to a base plate, and side rail plates are fixedly connected to the left and right ends of the base plate respectively. Motors are respectively provided on the outer side of the two side rail plates, and worm gears are fixedly connected to the output ends of the motors respectively. Worm gears are respectively meshed with worm wheels at the upper ends of the worm gears. The drive arms are respectively coaxially fixedly connected to the inner ends of the worm wheels.

[0008] The upper surface of the base plate is slidably connected to a multi-stage telescopic cylinder. A support plate is fixed to the upper surface of the multi-stage telescopic cylinder. A slot is opened in the middle of the upper surface of the support plate, and the collection box is detachably installed in the slot.

[0009] The left and right ends of the pallet are respectively fixed with first sliding pins, and the two sides of the side rail plate are respectively provided with U-shaped rail grooves that mesh with the corresponding first sliding pins. The drive arm is respectively provided with long keyways that cooperate with the first sliding pins.

[0010] A collection port is fixedly connected to the lower inner wall of the separation box. An extension nozzle extending downward and cooperating with the collection box is fixedly connected to the lower surface of the collection port. First sealing plates are slidably connected to the left and right inner walls of the extension nozzle. First spring seats are fixedly connected to the front and rear ends of the outer end faces of the two first sealing plates. First tension springs are fixedly connected to the inner end faces of the first spring seats. The other ends of the first tension springs are fixedly connected to the left and right end surfaces of the extension nozzle. Long pins are fixedly connected to the front and rear end surfaces of the first sealing plates. Two triangular wedge blocks cooperating with the corresponding long pins are fixedly connected to the front and rear sides of the upper surface of the collection box.

[0011] The inner walls of the left and right ends of the collection box are slidably connected to a second sealing plate. A second spring seat is fixedly connected to the outer end face of the second sealing plate. A second tension spring is fixedly connected to the inner end face of the second spring seat. The other end of the second tension spring is fixedly connected to the surface of the left and right ends of the collection box. The inner side of the upper surface of the second sealing plate is provided with a beveled surface that matches the extension nozzle.

[0012] This invention features a novel structure, ingenious design, and simple and convenient operation, offering the following advantages compared to existing technologies:

[0013] In use, this invention connects to the upper part of the separation tank via a heat exchanger tube, allowing liquid ammonia to enter the separation device. The impact force of the liquid ammonia causes impurities to be flushed into the separation tank. A heater provides heat to the inside of the separation tank. When the liquid ammonia flows into the tank, the temperature generated by the heater causes it to evaporate into gas. Impurities, under gravity, fall to the lower part of the separation tank, where the evaporated ammonia is recovered to a designated location, thus achieving the filtration of impurities and ammonia. The device is then activated by starting a motor. The arm rotates, and when the drive arm swings, it can control the collection box to move to both ends of the communicating vessel. When the collection box moves to the front end of the communicating vessel, that is, the upper end of the open box, it is easy to remove the collection box for centralized processing of the impurities inside. When the collection box moves to the rear end of the communicating vessel, that is, inside the separation box, it can receive the impurities inside the separation box. Thus, the separation device can remove and transfer impurities in a sealed state at all times. It has high impurity removal efficiency, good sealing effect, low operating cost, can reduce ammonia loss, and can also reduce environmental pollution. Attached Figure Description

[0014] Figure 1This is a schematic plan view of a low-temperature methanol washing ammonia system separation device according to the present invention.

[0015] Figure 2 This is a schematic diagram of the separation box structure of a low-temperature methanol washing ammonia system separation device according to the present invention.

[0016] Figure 3 This is a cross-sectional view of the separation box of a low-temperature methanol washing ammonia system separation device according to the present invention.

[0017] Figure 4 This is a schematic diagram of the heating tube installation of a low-temperature methanol washing ammonia separation device according to the present invention.

[0018] Figure 5 This is a schematic diagram of the base plate installation of a low-temperature methanol washing ammonia separation device according to the present invention.

[0019] Figure 6 This is a schematic diagram of the drive arm structure of a low-temperature methanol washing ammonia system separation device according to the present invention.

[0020] Figure 7 This is a schematic diagram of the tray installation of a low-temperature methanol washing ammonia system separation device according to the present invention.

[0021] Figure 8 This is a cross-sectional view of the collection port of a low-temperature methanol washing ammonia system separation device according to the present invention.

[0022] Figure 9 This is a cross-sectional view of the extended nozzle of a low-temperature methanol washing ammonia system separation device according to the present invention.

[0023] Figure 10 This is a cross-sectional view of the collection tank of a low-temperature methanol washing ammonia separation device according to the present invention.

[0024] The following are the labels in the diagram: 1-Separation device, 2-Heater, 3-Heat exchanger, 4-Separation box, 5-Heating tube, 6-Baffle, 7-Open box, 8-Base plate, 9-Side rail plate, 10-Motor, 11-Worm, 12-Worm wheel, 13-Drive arm, 14-Long keyway, 15-First sliding pin, 16-Panel, 17-Slot, 18-Multi-stage telescopic cylinder, 19-Collection port, 20-Extension nozzle, 21-Collection box, 22-First sealing plate, 23-First spring seat, 24-First tension spring, 25-Long pin, 26-Triangular wedge block, 27-Second sealing plate, 28-Second spring seat, 29-Second tension spring, 30-Short keyway, 31-U-shaped rail groove. Detailed Implementation

[0025] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] like Figure 1-10 As shown, the present invention provides a separation device for a low-temperature methanol washing ammonia system, including a heat exchanger 3, a heater 2, and a separation device 1. The heat exchanger 3 is pipe-connected to the separation device 1, and the heater 2 can provide heat energy to the separation device 1. The separation device 1 includes a separation box 4, an open box 7 on one side of the lower end of the separation box 4, and a partition 6 fixed to the inner wall of the middle part of the separation box 4. The separation box 4, the open box 7, and the partition 6 together form a communicating vessel for storing liquid. Two synchronously swinging drive arms 13 are provided at the bottom of the communicating vessel. A collection box 21 for collecting impurities is also provided inside the communicating vessel. When the drive arms 13 rotate, the collection box 21 can be moved to both ends of the communicating vessel.

[0027] like Figure 1-8 As shown, the heat exchanger 3 is used in industrial ammonia processing to form ammonia into the desired liquid or gaseous form. The heat exchanger 3 is existing technology and will not be described further. The heat exchanger 3 is connected to the upper part of the separation tank 4, allowing liquid ammonia to enter the separation device 1. The impact force of the liquid ammonia causes impurities to be flushed into the separation tank 4. The heater 2 provides heat to the interior of the separation tank 4. The heater 2 is existing technology and will not be described further. When liquid ammonia flows into the separation tank 4, the separation tank 4 reaches a certain temperature under the action of the heater 2, causing the liquid ammonia to evaporate into gas. Impurities fall to the lower part of the separation tank 4 under gravity. The upper part of the separation tank 4 is also equipped with a discharge pipe, allowing the evaporated ammonia gas in the separation tank 4 to be recovered to a designated location, i.e., back into the ammonia system. This achieves the filtration of impurities and ammonia gas. The installation and shape of the separation tank 4, partition 6, and open box 7 are as follows. Figure 2-3 As shown, a U-shaped communicating vessel is formed. By adding a solution that is incompatible with ammonia and does not react with it, such as vegetable oil or a high-concentration alkaline solution, into the open box 7, the upper end of the solution is higher than the bottom of the partition 6, forming a seal on the separation box 4. The lower part of the separation box 4 is sealed with the solution, and the upper part forms a sealed space, preventing external dust, impurities, and air from entering the separation box 4. The collection box 21 can collect the impurities discharged from the separation box 4. The drive arm 13 can control the collection box 21 to move to both ends of the communicating vessel when it swings. When the collection box 21 moves to the front end of the communicating vessel, that is, the upper end of the open box 7, it is easy to remove the collection box 21 for centralized processing of the impurities inside. When the collection box 21 moves to the rear end of the communicating vessel, that is, inside the separation box 4, the impurities inside the separation box 4 can be received. Thus, the separation device 1 can remove and transfer impurities in a sealed state, with high impurity removal efficiency, good sealing effect, and low operating cost.

[0028] The separation box 4 is equipped with a heating pipe 5 that is coiled on the inner wall of the separation box 4, and the heating pipe 5 is connected to the heater 2.

[0029] like Figure 3-4 As shown, the heating tube 5 is coiled inside the separation box 4, which can uniformly heat the inside of the separation box 4. The heating tube 5 is connected to the heater 2, which can circulate and heat the water inside the heating tube 5, so that the separation box 4 always has a heat source and maintains a certain temperature. Alternatively, the heating tube 5 and heater 2 can be replaced by electromagnetic heating or by installing the heating source inside the separation box 4.

[0030] The bottom of the communicating vessel is fixedly connected to a base plate 8. Side rail plates 9 are fixedly connected to the left and right ends of the base plate 8 respectively. Motors 10 are respectively provided on the outer side of the two side rail plates 9. Worms 11 are fixedly connected to the output ends of the motors 10 respectively. Worm wheels 12 are respectively meshed on the upper ends of the worms 11. The drive arms 13 are respectively coaxially fixedly connected to the inner ends of the worm wheels 12.

[0031] like Figure 4-5 As shown, the function of motor 10 is to provide rotational power for drive arm 13. Motor 10 is existing technology and will not be described in detail. The base plate 8 can support and fix the side rail plate 9. Motor 10 is fixed to the inner wall of the bottom end of separation box 4. Bearing seats are rotatably connected to one side of the outer surface of worm gear 11, and the bottom end of the bearing seats is fixed to the upper surface of separation box 4. A rotating shaft is fixed to the inner wall of worm wheel 12 and drive arm 13, and the rotating shaft is rotatably connected to the inner wall of side rail plate 9. After motor 10 is started, the corresponding worm gear 11 will rotate. The rotation of worm gear 11 will cause worm wheel 12 and drive arm 13 to rotate slowly by meshing with worm wheel 12. When drive arm 13 rotates, the corresponding collection box 21 can be moved. Since worm wheel 12 and worm gear 11 have a one-way self-locking function, the drive arm 13 will rotate to the designated position under the meshing of worm wheel 12 and worm gear 11 and have a stabilizing function.

[0032] The upper surface of the base plate 8 is slidably connected to a multi-stage telescopic cylinder 18. A support plate 16 is fixedly connected to the upper surface of the multi-stage telescopic cylinder 18. A slot 17 is provided in the middle of the upper surface of the support plate 16. The collection box 21 is detachably installed in the slot 17.

[0033] like Figure 7 As shown, the multi-stage telescopic rod can be slidably connected to the upper surface of the base plate 8. The multi-stage telescopic cylinder 18 can extend and retract vertically. By limiting the tray 16 through the multi-stage telescopic rod, the tray 16 can be moved up and down or back and forth. The collection box 21 can be quickly disassembled through the slot 17. The slot 17 and the collection box 21 are installed with an interference fit.

[0034] The left and right ends of the pallet 16 are respectively fixed with first sliding pins 15, and the two ends of the side rail plate 9 are respectively provided with U-shaped rail grooves 31 that mesh with the corresponding first sliding pins 15. The drive arm 13 is respectively provided with long keyways 14 that cooperate with the first sliding pins 15.

[0035] like Figure 6-7 As shown, the U-shaped rail groove 31 can limit the movement of the first sliding pin 15 along the inner wall of the U-shaped rail groove 31. The long keyway 14 can drive the first sliding pin 15 to move along the inner wall of the U-shaped rail groove 31 when the drive arm 13 rotates, so that the corresponding tray 16 can move forward and backward or up and down, thereby moving the collection box 21 to the designated position.

[0036] A collection port 19 is fixedly connected to the lower inner wall of the separation box 4. An extension nozzle 20 extending downward and cooperating with the collection box 21 is fixedly connected to the lower surface of the collection port 19. First sealing plates 22 are slidably connected to the left and right inner walls of the extension nozzle 20. First spring seats 23 are fixedly connected to the front and rear ends of the outer end faces of the two first sealing plates 22. First tension springs 24 are fixedly connected to the inner end faces of the first spring seats 23. The other end of the first tension springs 24 is fixedly connected to the left and right end surfaces of the extension nozzle 20. Long pins 25 are fixedly connected to the front and rear end surfaces of the first sealing plates 22. Two triangular wedge blocks 26 cooperating with the corresponding long pins 25 are fixedly connected to the front and rear sides of the upper surface of the collection box 21.

[0037] like Figure 8-9 As shown, the collection port 19 is installed and shaped as follows: Figure 8 As shown, the lower end is concave on the inner side. When impurities fall into the collection port 19, they will continue to slide downwards to the inner wall of the extension nozzle 20 under their own gravity. The extension nozzle 20 is a hollow shape with openings at the top and bottom. The installation and shape of the extension nozzle 20 and the collection box 21 are as follows. Figure 10 As shown, the collection box 21 has multiple mesh openings, allowing the solution to flow out through the mesh when the collection box 21 moves upward to detach from the solution, preventing the collection box 21 from carrying away some solution; the first sealing plate 22 is slidably connected to the inner wall of the extension nozzle 20; the function of the first spring seat 23 is to support the first tension spring 24, and the tension of the first tension spring 24 itself can give the first spring seat 23 and the first sealing plate 22 an inward driving force; the long pin 25 and the triangular wedge block 26 are installed and shaped as follows. Figure 9As shown, short keyways 30 are respectively provided on the inner walls of the front and rear ends of the extension nozzle 20. Long pins 25 pass through the inner walls of the short keyways 30 and engage with the corresponding triangular wedge blocks 26. When the impurities in the collection box 21 reach a certain amount, the motor 10 is started to move the collection box 21 downward. The downward movement of the collection box 21 will cause the corresponding triangular wedge blocks 26 to move downward. When the triangular wedge blocks 26 move downward, they will slowly disengage from the corresponding long pins 25. Under the tension of the first tension spring 24, the long pins 25 will move inward, that is, the corresponding first sealing plate 22 will move inward to close, thereby closing the corresponding extension nozzle 20. At this time, when the corresponding impurities continue to fall, they can be temporarily stored in the extension nozzle 20 to prevent the impurities from falling into the solution. When the collection box 21 and the triangular wedge blocks 26 move upward, they will drive the two long pins 25 to move outward, that is, the corresponding first sealing plate 22 will move outward, thereby opening the extension nozzle 20 again, and the collection box 21 will continue to collect impurities.

[0038] The inner walls of the left and right ends of the collection box 21 are respectively slidably connected to a second sealing plate 27. A second spring seat 28 is fixedly connected to the outer end face of the second sealing plate 27. A second tension spring 29 is fixedly connected to the inner end face of the second spring seat 28. The other end of the second tension spring 29 is fixedly connected to the left and right end faces of the collection box 21. The inner side of the upper end face of the second sealing plate 27 is respectively provided with a beveled surface that cooperates with the extension nozzle 20.

[0039] like Figure 10 As shown, the second sealing plate 27 is slidably connected to the inner wall of the collection box 21. The second tension spring 29, through its own tension, can drive the corresponding second sealing plate 27 to exert an inward driving force; the beveled surface is set as follows... Figure 10 As shown, when the collection box 21 moves upward to contact the extension nozzle 20, the engagement of the lower edge and the beveled surface of the extension nozzle 20 will cause the second sealing plate 27 to move outward. The outward movement of the second sealing plate 27 will open the upper port of the collection box 21, thus collecting impurities. When the collection box 21 moves downward, the tension of the second tension spring 29 will cause the two second sealing plates 27 to close inward, thus closing the collection box 21. When entering the solution, this will prevent impurities from escaping from the collection box 21.

[0040] In use, this invention connects to the upper part of the separation tank 4 via a heat exchanger 3, allowing liquid ammonia to enter the separation device 1. The impact force of the liquid ammonia causes impurities to be flushed into the separation tank 4. A heater 2 provides heat to the interior of the separation tank 4. When the liquid ammonia flows into the separation tank 4, the tank reaches a certain temperature under the action of the heater 2, causing the liquid ammonia to evaporate into gas. Impurities, under gravity, fall to the lower part of the separation tank 4, and the evaporated ammonia gas is then recovered to a designated location, achieving the filtration of impurities and ammonia gas. The motor 10 is activated to drive the arm 1... 3. Rotation: When the drive arm 13 swings, it can control the collection box 21 to move to both ends of the communicating vessel. When the collection box 21 moves to the front end of the communicating vessel, that is, the upper end of the open box 7, it is easy to remove the collection box 21 for centralized processing of the impurities inside. When the collection box 21 moves to the rear end of the communicating vessel, that is, inside the separation box 4, it can receive the impurities inside the separation box 4. Thus, the separation device 1 can remove and transfer impurities in a sealed state. It has high impurity removal efficiency, good sealing effect, low operating cost, can reduce ammonia loss, and can also reduce environmental pollution.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A low-temperature methanol-ammonia washing system separation device, comprising a heat exchanger (3), a heater (2), and a separation device (1), characterized in that: The heat exchanger (3) is connected to the separation device (1) in a pipe. The heater (2) can provide heat energy to the separation device (1). The separation device (1) includes a separation box (4). An open box (7) is provided on one side of the lower end of the separation box (4). A partition (6) is fixed to the inner wall of the middle part of the separation box (4). The separation box (4), the open box (7) and the partition (6) together form a communicating vessel for storing liquid. Two drive arms (13) that can swing synchronously are provided at the bottom of the communicating vessel. A collection box (21) that can collect impurities is also provided inside the communicating vessel. When the drive arm (13) rotates, it can form a structure in which the collection box (21) moves to both ends of the communicating vessel.

2. The low-temperature methanol washing ammonia system separation device as described in claim 1, characterized in that: The separation box (4) is equipped with a heating pipe (5) that is coiled on the inner wall of the separation box (4), and the heating pipe (5) is connected to the heater (2).

3. The low-temperature methanol washing ammonia separation system as described in claim 1, characterized in that: The bottom of the communicating vessel is fixedly connected to a base plate (8), and side rail plates (9) are fixedly connected to the left and right ends of the base plate (8). Motors (10) are respectively provided on the outer sides of the two side rail plates (9). Worms (11) are fixedly connected to the output ends of the motors (10). Worm wheels (12) are respectively meshed on the upper ends of the worms (11). The drive arms (13) are respectively coaxially fixed to the inner ends of the worm wheels (12).

4. The low-temperature methanol washing ammonia system separation device as described in claim 3, characterized in that: The upper surface of the base plate (8) is slidably connected to a multi-stage telescopic cylinder (18), and a support plate (16) is fixedly connected to the upper surface of the multi-stage telescopic cylinder (18). A slot (17) is opened in the middle of the upper surface of the support plate (16), and the collection box (21) is detachably installed in the slot (17).

5. The low-temperature methanol washing ammonia system separation device as described in claim 4, characterized in that: The left and right ends of the pallet (16) are respectively fixed with first sliding pins (15), and the two sides of the side rail plate (9) are respectively provided with U-shaped rail grooves (31) that mesh with the corresponding first sliding pins (15). The drive arm (13) is respectively provided with long keyways (14) that cooperate with the first sliding pins (15).

6. The low-temperature methanol washing ammonia system separation device as described in claim 1, characterized in that: The lower inner wall of the separation box (4) is fixed with a collection port (19). The lower surface of the collection port (19) is fixed with an extension nozzle (20) that extends downward and cooperates with the collection box (21). The left and right inner walls of the extension nozzle (20) are respectively slidably connected with a first sealing plate (22). The front and rear ends of the outer end faces of the two first sealing plates (22) are respectively fixed with a first spring seat (23). The inner end face of the first spring seat (23) is respectively fixed with a first tension spring (24). The other end of the first tension spring (24) is respectively fixed to the left and right end surfaces of the extension nozzle (20). The front and rear end surfaces of the first sealing plate (22) are respectively fixed with a long pin (25). The front and rear sides of the upper surface of the collection box (21) are respectively fixed with two triangular wedge blocks (26) that cooperate with the corresponding long pins (25).

7. The low-temperature methanol washing ammonia separation device as described in claim 6, characterized in that: The inner walls of the left and right ends of the collection box (21) are slidably connected to a second sealing plate (27). A second spring seat (28) is fixedly connected to the outer end face of the second sealing plate (27). A second tension spring (29) is fixedly connected to the inner end face of the second spring seat (28). The other end of the second tension spring (29) is fixedly connected to the left and right end surfaces of the collection box (21). The inner side of the upper end surface of the second sealing plate (27) is provided with a beveled surface that matches the extension nozzle (20).

Images