High purity level processing system for desulfurized feed gas

Abstract

The utility model discloses a desulfurization raw material gas high pure level processing system, including the waste heat recovery ware, and the outside right side of waste heat recovery ware is connected with the pre rectifying column through the pipeline. The utility model discloses through multistage purification's design, carries out multiple mode purification treatment to the noncondensable gas impurity in raw material, thus can know, through using the device among the application, has improved the high pure effect of liquid carbon dioxide, in addition, the liquid carbon dioxide after high purity can be stored at low temperature, has guaranteed the stability of liquid carbon dioxide subsequent use. The utility model discloses through the design of mechatronics, can monitor the capacity of liquid carbon dioxide stored in low temperature storage tank, store the capacity of liquid carbon dioxide in low temperature storage tank in the range required by the staff with this, not only has guaranteed the stability of liquid carbon dioxide storage, still plays the protection treatment to low temperature storage tank.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically a high-purity desulfurization raw gas treatment system. Background Technology

[0002] Liquid carbon dioxide is a colorless and odorless liquid formed by liquefying carbon dioxide gas under high pressure and low temperature conditions. It is widely used in industry, food, and medical fields. Its chemical properties are stable, and it has multiple functions such as refrigeration, preservation, and fire extinguishing. Current technology for producing high-purity liquid carbon dioxide uses a complete adsorption method: passing carbon dioxide gas with a purity of over 99.99% through an adsorbent to adsorb impurities, achieving a product purity of 99.999%. However, this method is costly, requires three adsorption towers to be continuously switched and regenerated in short intervals, and has low output, producing a maximum of only 50 kg of product per hour, resulting in low production efficiency.

[0003] A patent search revealed a document, publication number "CN204400624U," entitled "A Production System for Preparing High-Purity Liquid Carbon Dioxide." While the device described in this publication addresses the aforementioned problems, it lacks the capability for multi-stage purification of the raw gas, thus reducing the high-purity effect of the liquid carbon dioxide. Therefore, this invention designs a high-purity treatment system for desulfurized raw gas to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a high-purity desulfurization feed gas treatment system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-purity desulfurization feed gas treatment system, including a waste cooling recovery unit. A pre-distillation tower is connected to the external right side of the waste cooling recovery unit via a pipeline. A reboiler is fixedly installed at the top of the pre-distillation tower. A reflux pump is fixedly installed at the external front end of the pre-distillation tower, and the reflux pump is connected to the reboiler via a pipeline. A high-purity primary liquefaction unit is connected to the right side of the pre-distillation tower via a pipeline. A high-purity purification tower is connected to the right side of the high-purity primary liquefaction unit via a pipeline. A high-purity reboiler is connected to the front end of the high-purity purification tower via a pipeline. A high-purity secondary liquefaction unit is connected to the right side of the high-purity secondary liquefaction unit via a pipeline. A high-purity reflux tank is connected to the right side of the high-purity reflux tank via a pipeline. A high-purity subcooler located on the right side of the high-purity reflux tank is connected to the high-purity purification tower via a pipeline.

[0006] Furthermore, the rear end of the high-purity reflux tank is connected to the high-purity purification tower via a pipeline, and the front end of the high-purity reflux tank is connected to the waste cooling recovery unit via a pipeline.

[0007] Furthermore, a connecting pipe is fixedly installed on the left side of the waste cooling recovery unit, and a first valve is rotatably passed through the outside of the connecting pipe.

[0008] Furthermore, an installation pipe is fixedly installed on the right side of the high-purity subcooler, a second valve is rotatably inserted through the outside of the installation pipe, and a low-temperature storage tank is fixedly installed on the right side of the installation pipe.

[0009] Furthermore, a discharge head is fixedly inserted through the lower right side of the cryogenic storage tank, and a third valve is inserted through the external rotating part of the discharge head.

[0010] Furthermore, a guide sleeve is fixedly inserted through the top middle of the cryogenic storage tank, and a rubber slider is slidably connected inside the guide sleeve, with a top rod fixed at the top of the slider.

[0011] Furthermore, the push rod has an irregular shape design, and the push rod slides through a guide sleeve, with a spring installed at the upper end of the guide sleeve.

[0012] Furthermore, the spring is sleeved on the outside of the top rod, the top end of the spring is fixedly connected to the guide sleeve, and the bottom end of the spring is fixedly connected to the slider.

[0013] Furthermore, a mounting plate is fixedly provided on the top left side of the cryogenic storage tank. The mounting plate has a first threaded hole integrally provided at both the front and rear ends. An L-shaped plate is provided on the top of the mounting plate, and a second threaded hole integrally provided at both the front and rear ends of the L-shaped plate. Bolts are provided inside the first threaded hole and the second threaded hole.

[0014] Furthermore, a connecting plate is fixed to the outer right side of the L-shaped plate, a switch is fixed to the bottom of the connecting plate, and an alarm is fixed to the outer left side of the L-shaped plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model uses a multi-stage purification design to purify non-condensable gas impurities in raw materials through multiple methods. Thus, by using the device in this application, the high purity effect of liquid carbon dioxide is improved. In addition, this application can store the high-purity liquid carbon dioxide at low temperature, ensuring the stability of the liquid carbon dioxide for subsequent use.

[0017] 2. This utility model, through its mechatronics design, can monitor the capacity of liquid carbon dioxide stored in a cryogenic storage tank, thereby controlling the capacity of liquid carbon dioxide stored in the cryogenic storage tank within the range required by the staff. This not only ensures the stability of liquid carbon dioxide storage but also provides protection for the cryogenic storage tank. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front perspective perspective view of the high-purity desulfurization feed gas treatment system of this utility model;

[0020] Figure 2 This is an enlarged 3D view of a cryogenic storage tank;

[0021] Figure 3 A three-dimensional view of the inside of the guide sleeve;

[0022] Figure 4 This is an exploded perspective view of the mounting plate and the L-shaped plate.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1-Residual cooling recovery unit, 2-Pre-distillation column, 3-Pre-distillation column reboiler, 4-Reflux pump, 5-High-purity primary liquefier, 6-High-purity purification column, 7-High-purity reboiler, 8-High-purity secondary liquefier, 9-High-purity reflux tank, 10-High-purity subcooler, 11-Connecting pipe, 12-First valve, 13-Installation pipe, 14-Second valve, 15-Cryogenic storage tank, 16-Discharge head, 17-Third valve, 18-Guide sleeve, 19-Slider, 20-Top rod, 21-Spring, 22-Installation plate, 23-First threaded hole, 24-L-shaped plate, 25-Second threaded hole, 26-Bolt, 27-Connecting plate, 28-Switch, 29-Alarm. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] like Figure 1 , Figure 2As shown, the high-purity desulfurization feed gas treatment system includes a waste cooling recovery unit 1. A pre-distillation tower 2 is connected to the right side of the waste cooling recovery unit 1 via a pipeline. A pre-distillation tower reboiler 3 is fixed at the top of the pre-distillation tower 2. A reflux pump 4 is fixed to the front end of the pre-distillation tower 2, and the reflux pump 4 is connected to the pre-distillation tower reboiler 3 via a pipeline. A high-purity primary liquefaction unit 5 is connected to the right side of the pre-distillation tower 2 via a pipeline. A high-purity purification tower 6 is connected to the right side of the high-purity primary liquefaction unit 5 via a pipeline. A high-purity reboiler 7 is connected to the front end of the high-purity purification tower 6 via a pipeline. A high-purity secondary liquefaction unit 8 is connected to the right side of the high-purity secondary liquefaction unit 6 via a pipeline. A high-purity reflux tank 9 is connected to the right side of the high-purity reflux tank 9 via a high-purity subcooler 10, which is connected to the high-purity purification tower 6 via a pipeline.

[0028] The rear end of the high-purity reflux tank 9 is connected to the high-purity purification tower 6 through a pipeline, and the front end of the high-purity reflux tank 9 is connected to the waste cooling recovery unit 1 through a pipeline. A connecting pipe 11 is fixedly installed on the left side of the waste cooling recovery unit 1, and a first valve 12 is rotatably passed through the outside of the connecting pipe 11. An installation pipe 13 is fixedly installed on the right side of the high-purity subcooler 10, and a second valve 14 is rotatably passed through the outside of the installation pipe 13. A low-temperature storage tank 15 is fixedly installed on the right side of the installation pipe 13.

[0029] First, connecting pipe 11 is connected to the raw material gas storage device. First valve 12 and second valve 14 are opened, and the 40°C, 2.5MPa raw material gas from the compression and desulfurization system enters the waste cooling recovery unit 1 through connecting pipe 11. The waste cooling recovery unit 1 exchanges heat with the low-temperature non-condensable gas from the high-purity and high-purity food-grade systems, and then enters the pre-distillation column 2. The pre-distillation column reboiler 3 and reflux pump 4 perform pre-distillation to remove moisture, methanol, and other heavy components from the raw material gas. The pre-distilled 2.5MPa, -13°C gaseous material is discharged into the high-purity primary liquefaction unit 5. The high-purity primary liquefaction unit 5 is equipped with Freon, which is used for evaporative cooling to cool the material to - At 20℃, the gas is discharged into the high-purity purification tower 6. The high-purity secondary liquefaction unit 8, the high-purity reflux tank 9, and the high-purity reboiler 7 further cryogenically liquefy and distill to remove non-condensable impurities from the raw material. At the bottom of the high-purity purification tower 6, qualified high-purity liquid carbon dioxide at -13℃ and 2.5 MPa is obtained. The -13℃ liquid titanium dioxide collected from the bottom of the high-purity purification tower 6 is subcooled to -25℃ by the high-purity subcooler 10 and then sent to the low-temperature storage tank 15 for storage and sale. The low-temperature non-condensable gas at 2.5 MPa and -25℃ discharged from the high-purity reflux tank 9 is recycled to 28℃ by the waste cooling recovery unit 1. The 28℃ non-condensable tail gas after recycling is then sent to a high-level vent.

[0030] Example 2

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a discharge head 16 is fixedly inserted through the lower right side of the cryogenic storage tank 15. A third valve 17 rotates through the outside of the discharge head 16. A guide sleeve 18 is fixedly inserted through the middle of the top of the cryogenic storage tank 15. A rubber slider 19 is slidably connected inside the guide sleeve 18. A top rod 20 is fixedly installed on the top of the slider 19. The top rod 20 has an irregular shape and slides through the guide sleeve 18. A spring 21 is installed at the upper end of the guide sleeve 18. The spring 21 is sleeved on the outside of the top rod 20, and the top of the spring 21 is fixedly connected to the guide sleeve 18. The bottom end of the spring 21 is fixedly connected to the slider 19. The top left side of the cryogenic storage tank 15 is fixedly provided with a mounting plate 22. The front and rear ends of the mounting plate 22 are integrally provided with a first threaded hole 23. The top of the mounting plate 22 is provided with an L-shaped plate 24, and the front and rear ends of the L-shaped plate 24 are integrally provided with a second threaded hole 25. The first threaded hole 23 and the second threaded hole 25 are provided with bolts 26. The right side of the L-shaped plate 24 is fixedly provided with a connecting plate 27. The bottom of the connecting plate 27 is fixedly provided with a switch 28. The left side of the L-shaped plate 24 is fixedly provided with an alarm 29.

[0032] According to the operation method in Embodiment 1, when liquid carbon dioxide is discharged into the cryogenic storage tank 15, the liquid carbon dioxide squeezes the slider 19, which drives the push rod 20 to move upward along the direction of the guide sleeve 18, and the spring 21 deforms until the push rod 20 applies pressure to the switch 28. Then the alarm 29 sounds an alarm to remind the staff that the space inside the cryogenic storage tank 15 is about to be used up. The staff first closes the first valve 12 and the second valve 14, and then separates the bolt 26 from the first threaded hole 23 and the second threaded hole 25 to separate the L-shaped plate 24 from the mounting plate 22. Then a new cryogenic storage tank 15 can be replaced. In addition, the staff can open the third valve 17 to discharge the liquid carbon dioxide inside the cryogenic storage tank 15 into the designated area through the discharge head 16.

Claims

1. A high-purity desulfurization feed gas treatment system, including a waste heat recovery unit (1), characterized in that: The external right side of the waste heat recovery unit (1) is connected to a pre-distillation column (2) via a pipe. The pre-distillation column reboiler (3) is fixed at the top of the interior of the pre-distillation column (2). The external front end of the pre-distillation column (2) is fixed with a reflux pump (4), and the reflux pump (4) is connected to the pre-distillation column reboiler (3) via a pipe. The right side of the pre-distillation column (2) is connected to a high-purity primary liquefier (5) via a pipe. The right side of the high-purity primary liquefier (5) is connected to a high-purity purification column (6) via a pipe. The front end of the high-purity purification column (6) is connected to a high-purity reboiler (7) via a pipe. The right side of the high-purity purification column (6) is connected to a high-purity secondary liquefier (8) via a pipe. The right side of the high-purity secondary liquefier (8) is connected to a high-purity reflux tank (9) via a pipe. The high-purity subcooler (10) set on the right side of the high-purity reflux tank (9) is connected to the high-purity purification column (6) via a pipe.

2. The high-purity desulfurization feed gas treatment system according to claim 1, characterized in that: The rear end of the high-purity reflux tank (9) is connected to the high-purity purification tower (6) via a pipeline, and the front end of the high-purity reflux tank (9) is connected to the waste cooling recovery unit (1) via a pipeline.

3. The high-purity desulfurization feed gas treatment system according to claim 1, characterized in that: A connecting pipe (11) is fixedly installed on the left side of the waste heat recovery unit (1), and a first valve (12) is rotatably passed through the outside of the connecting pipe (11).

4. The high-purity desulfurization feed gas treatment system according to claim 1, characterized in that: The high-purity subcooler (10) is fixedly provided with an installation pipe (13) on the right side, and a second valve (14) is rotatably passed through the outside of the installation pipe (13). A low-temperature storage tank (15) is fixedly provided on the right side of the installation pipe (13).

5. The high-purity desulfurization feed gas treatment system according to claim 4, characterized in that: The lower right side of the cryogenic storage tank (15) is fixedly connected to a discharge head (16), and the discharge head (16) is externally connected to a third valve (17).

6. The high-purity desulfurization feed gas treatment system according to claim 4, characterized in that: A guide sleeve (18) is fixedly inserted through the top middle of the cryogenic storage tank (15). A rubber slider (19) is slidably connected inside the guide sleeve (18), and a top rod (20) is fixedly provided on the top of the slider (19).

7. The high-purity desulfurization feed gas treatment system according to claim 6, characterized in that: The top rod (20) has an irregular shape and slides through the guide sleeve (18). A spring (21) is provided at the upper end of the guide sleeve (18).

8. The high-purity desulfurization feed gas treatment system according to claim 7, characterized in that: The spring (21) is sleeved on the outside of the top rod (20). The top end of the spring (21) is fixedly connected to the guide sleeve (18), and the bottom end of the spring (21) is fixedly connected to the slider (19).

9. The high-purity desulfurization feed gas treatment system according to claim 4, characterized in that: A mounting plate (22) is fixedly provided on the top left side of the cryogenic storage tank (15). The mounting plate (22) has a first threaded hole (23) integrally provided at both the front and rear ends. An L-shaped plate (24) is provided on the top of the mounting plate (22), and a second threaded hole (25) is integrally provided at both the front and rear ends of the L-shaped plate (24). Bolts (26) are provided inside the first threaded hole (23) and the second threaded hole (25).

10. The high-purity desulfurization feed gas treatment system according to claim 9, characterized in that: A connecting plate (27) is fixedly provided on the right side of the L-shaped plate (24), a switch (28) is fixedly provided at the bottom of the connecting plate (27), and an alarm (29) is fixedly provided on the left side of the L-shaped plate (24).

Images