System and method for efficiently removing dimethyl ether in propane

Abstract

The invention discloses an efficient removal system and method for dimethyl ether in propane, and relates to the field of chemical engineering.The efficient removal system comprises a removal tank body, a sealing top cover, a driving motor, a rotating rod and a removal stirring frame, the sealing top cover is fixedly installed at the upper end of the removal tank body, and the driving motor is fixedly installed at the upper end of the sealing top cover; the rotating rod is movably mounted in the removal tank body, and the removal stirring frame is fixedly mounted on the outer side of the rotating rod. According to the efficient removal system and method for dimethyl ether in propane, low-temperature refrigeration is carried out on the removal tank body, temperature dissipation is more uniform, separation deviation caused by too low temperature of part of the removal tank body is prevented, dimethyl ether removal is carried out more accurately, the removal stirring frame and the rolling and conveying blade stir propane differently, and the dimethyl ether removal efficiency is improved. The unseparated propane is continuously contacted with the low temperature at the bottom of the removal tank body, and the dimethyl ether is suspended and ascends after being separated, so that the removal efficiency of the dimethyl ether in the propane is increased, and the dimethyl ether is more efficiently removed.

Description

Technical Field

[0001] The present invention relates to the field of chemical engineering, and particularly to a high-efficiency dimethyl ether removal system and method for propane. Background Art

[0002] The dimethyl ether removal system for propane is a chemical equipment for separating dimethyl ether from propane. It mainly uses the method of cryogenic refrigeration to utilize the boiling point difference between propane and dimethyl ether to achieve the separation of propane and dimethyl ether, and is widely used in propane production and processing occasions;

[0003] However, when the high-efficiency dimethyl ether removal system for propane is in use, it generally uses a refrigeration pipe to cool propane cryogenically to achieve the removal and processing. However, when the refrigeration pipe is in direct contact with propane, it will cause the temperature of some propane to be too low, while the contact with low temperature of other propane is poor, resulting in easy deviation in separation and inaccurate removal of dimethyl ether. Moreover, the separated propane occupies the space of low-temperature contact, resulting in the inability of propane to continue low-temperature separation in a timely manner, thus leading to poor dimethyl ether removal efficiency. Summary of the Invention

[0004] The main purpose of the present invention is to provide a high-efficiency dimethyl ether removal system and method for propane, which can effectively solve the technical problems raised in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A high-efficiency dimethyl ether removal system and method for propane, including a removal tank body, a sealed top cover, a driving motor, a rotating rod, and a removal stirring frame. The sealed top cover is fixedly installed at the upper end of the removal tank body. The driving motor is fixedly installed at the upper end of the sealed top cover. The rotating rod is movably installed inside the removal tank body. The removal stirring frame is fixedly installed on the outer side of the rotating rod. A discharge pipe is fixedly installed at the bottom of the outer side of the removal tank body. A winding connecting rod is fixedly installed at the lower end of the rotating rod. Winding blades are welded on the outer side of the winding connecting rod. A heating structure is wrapped around the lower part of the outer side of the removal tank body.

[0007] As a further solution of the present invention, a movable cover door is movably installed on one side of the driving motor at the upper end of the sealed top cover, and the movable cover door communicates with the inside of the removal tank body.

[0008] As a further solution of the present invention, a ladder is fixedly installed at the rear of the driving motor at the upper end of the sealed top cover, and the ladder extends to the rear of the removal tank body.

[0009] As a further solution of the present invention, the driving motor is composed of a gearbox and a motor. The driving motor, the removal stirring frame, and the winding blades are vertically arranged, and the removal stirring frame is located above the winding blades.

[0010] As a further solution of the present invention, the heating structure includes a top heat preservation shell, a bottom heat preservation shell, a top refrigeration pipe, a bottom refrigeration pipe and a conveying seat. The top heat preservation shell and the bottom heat preservation shell are sleeved outside the removal tank body, and the top heat preservation shell is located above the bottom heat preservation shell and is integrally formed and connected thereto. The top refrigeration pipe and the bottom refrigeration pipe are fixedly installed inside the top heat preservation shell and the bottom heat preservation shell, and the top refrigeration pipe is located above the bottom refrigeration pipe and is fixedly connected thereto. The conveying seat is fixedly installed at one end of the top refrigeration pipe and the bottom refrigeration pipe.

[0011] As a further solution of the present invention, the top refrigeration pipe and the bottom refrigeration pipe are attached to the outer wall of the removal tank body. The ends of the top refrigeration pipe and the bottom refrigeration pipe penetrate downward through the bottom heat preservation shell. The conveying seat is located outside the bottom heat preservation shell. The discharge pipe penetrates through the bottom heat preservation shell, and a support leg frame is fixedly installed on the outside of the bottom heat preservation shell.

[0012] As a further solution of the present invention, the upper end of the rotating rod penetrates through the sealing top cover and is fixedly connected to the rotating shaft of the driving motor, and the rotating rod and the winding connecting rod rotate synchronously.

[0013] As a further solution of the present invention, the top refrigeration pipe and the bottom refrigeration pipe are located outside the winding connecting rod and the winding blade. The discharge pipe communicates with the inside of the removal tank body, and the discharge pipe is located below the rotating rod and the winding connecting rod.

[0014] A method for using a high-efficiency dimethyl ether removal system in propane, the method specifically includes the following steps:

[0015] Step 1: The support leg frame plays an overall placement and support effect. After opening the movable cover door on the sealing top cover, propane is input into the removal tank body through the movable cover door. The input refrigerant pipeline is connected by the conveying seat, so that the refrigerant enters the top refrigeration pipe and the bottom refrigeration pipe from the conveying seat. The top refrigeration pipe and the bottom refrigeration pipe are attached to the removal tank body to perform low-temperature refrigeration on the inside of the removal tank body;

[0016] Step 2: After low temperature is generated inside the removal tank body, the boiling point of propane is -42°, while the boiling point of dimethyl ether is -24.8°C. Utilizing the boiling point difference between propane and dimethyl ether, dimethyl ether is separated from propane. Dimethyl ether is concentrated at the bottom of the tower due to its higher boiling point, while propane is concentrated above dimethyl ether. Therefore, when the discharge pipe is opened, dimethyl ether is discharged first, and then propane is discharged to achieve the removal of dimethyl ether in propane;

[0017] Step 3: When the top refrigeration pipe and the bottom refrigeration pipe perform low-temperature refrigeration on the removal tank body, the top heat preservation shell and the bottom heat preservation shell are sleeved outside the top refrigeration pipe and the bottom refrigeration pipe, which plays a heat preservation effect. Moreover, the top refrigeration pipe and the bottom refrigeration pipe do not directly contact propane, and perform low-temperature refrigeration on the removal tank body, and the temperature dissipation is more uniform;

[0018] Step 4: The top refrigeration pipe and the bottom refrigeration pipe cool the bottom of the removal tank, so that the low temperature is concentrated at the bottom position inside the removal tank. Then, the operation of the drive motor drives the rotation of the rotating rod and the winding connecting rod, thereby driving the rotation of the removal stirring frame and the winding blades. Therefore, dimethyl ether in propane is separated at the bottom of the removal tank. The removal stirring frame and the winding blades stir propane differently, and the unseparated propane continuously contacts the low temperature at the bottom of the removal tank. After separating dimethyl ether, it suspends and rises, increasing the efficiency of removing dimethyl ether from propane.

[0019] The above embodiments of the present invention can achieve the following beneficial effects: The top insulation shell and the bottom insulation shell are sleeved outside the top refrigeration pipe and the bottom refrigeration pipe, playing a heat preservation effect. Moreover, the top refrigeration pipe and the bottom refrigeration pipe do not directly contact propane, and cool the removal tank at a low temperature. The temperature dissipation is more uniform, preventing deviation in separation caused by some parts having too low temperature, and removing dimethyl ether more accurately.

[0020] Utilize the operation of the drive motor to drive the rotation of the rotating rod and the winding connecting rod, thereby driving the simultaneous rotation of the removal stirring frame and the winding blades. The rotation of the removal stirring frame stirs propane, and the winding blades simultaneously roll up the propane at the bottom upward. The upward-rolled steam contacts the descending liquid in a countercurrent manner, and fractional distillation is achieved by utilizing the volatility difference between propane and dimethyl ether. Stirring can enhance the gas-liquid contact and improve the separation efficiency.

[0021] Make the low temperature concentrated at the bottom position inside the removal tank. Therefore, dimethyl ether in propane is separated at the bottom of the removal tank. The removal stirring frame and the winding blades stir propane differently, and the unseparated propane continuously contacts the low temperature at the bottom of the removal tank. After separating dimethyl ether, it suspends and rises, thereby continuously stirring and descending the unseparated propane, increasing the efficiency of removing dimethyl ether from propane, and removing dimethyl ether more efficiently. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the overall structure of a high-efficiency dimethyl ether removal system for propane in the present invention;

[0023] Figure 2 It is a rear view of a high-efficiency dimethyl ether removal system for propane in the present invention;

[0024] Figure 3 It is an analysis diagram of the heating structure in a high-efficiency dimethyl ether removal system for propane in the present invention;

[0025] Figure 4 It is an analysis diagram of the removal tank in a high-efficiency dimethyl ether removal system for propane in the present invention;

[0026] Figure 5Bottom view of a high-efficiency dimethyl ether removal system for propane in the present invention;

[0027] Figure 6 Enlarged view of the removal tank in a high-efficiency dimethyl ether removal system for propane in the present invention;

[0028] Figure 7 Partial structural diagram of the removal tank in a high-efficiency dimethyl ether removal system for propane in the present invention;

[0029] Figure 8 Enlarged view of the rotating rod in a high-efficiency dimethyl ether removal system for propane in the present invention.

[0030] In the figure: 1, removal tank; 2, sealed top cover; 3, movable cover door; 4, drive motor; 5, rotating rod; 6, removal stirring frame; 7, winding connecting rod; 8, winding blade; 9, discharge pipe; 10, heating structure; 11, top heat preservation shell; 12, bottom heat preservation shell; 13, top refrigeration pipe; 14, bottom refrigeration pipe; 15, conveying seat; 16, support leg frame; 17, ladder. Detailed implementation manners

[0031] To make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0032] As Figures 1-8 shown, a high-efficiency dimethyl ether removal system and method for propane includes a removal tank 1, a sealed top cover 2, a drive motor 4, a rotating rod 5 and a removal stirring frame 6. The sealed top cover 2 is fixedly installed at the upper end of the removal tank 1, the drive motor 4 is fixedly installed at the upper end of the sealed top cover 2, the rotating rod 5 is movably installed inside the removal tank 1, the removal stirring frame 6 is fixedly installed outside the rotating rod 5, a discharge pipe 9 is fixedly installed at the outer bottom of the removal tank 1, a winding connecting rod 7 is fixedly installed at the lower end of the rotating rod 5, winding blades 8 are welded outside the winding connecting rod 7, and a heating structure 10 is wrapped below the outside of the removal tank 1.

[0033] In this embodiment, a movable cover door 3 is movably installed on one side of the drive motor 4 at the upper end of the sealed top cover 2. The movable cover door 3 communicates with the inside of the removal tank 1, and the movable cover door 3 plays an effect of opening and closing the sealed top cover 2.

[0034] In this embodiment, a ladder 17 is fixedly installed behind the drive motor 4 at the upper end of the sealed top cover 2. The ladder 17 extends to the rear of the removal tank 1, and the ladder 17 is used for operators to move above the removal tank 1.

[0035] In this embodiment, the drive motor 4 is composed of a gearbox and a motor. The drive motor 4 is vertically arranged with the removal stirring frame 6 and the winding and feeding blades 8. The removal stirring frame 6 is located above the winding and feeding blades 8, and the drive motor 4 plays the role of driving rotation.

[0036] In this embodiment, the heating structure 10 includes a top heat preservation shell 11, a bottom heat preservation shell 12, a top refrigeration pipe 13, a bottom refrigeration pipe 14, and a conveying seat 15. The top heat preservation shell 11 and the bottom heat preservation shell 12 are sleeved outside the removal tank body 1, and the top heat preservation shell 11 is located above the bottom heat preservation shell 12 and is integrally formed and connected with it. The top refrigeration pipe 13 and the bottom refrigeration pipe 14 are fixedly installed inside the top heat preservation shell 11 and the bottom heat preservation shell 12, and the top refrigeration pipe 13 is located above the bottom refrigeration pipe 14 and is fixedly connected with it. The conveying seat 15 is fixedly installed at one end of the top refrigeration pipe 13 and the bottom refrigeration pipe 14.

[0037] In this embodiment, the top refrigeration pipe 13 and the bottom refrigeration pipe 14 are attached to the outer wall of the removal tank body 1. The ends of the top refrigeration pipe 13 and the bottom refrigeration pipe 14 penetrate downward through the bottom heat preservation shell 12. The conveying seat 15 is located outside the bottom heat preservation shell 12. The discharge pipe 9 penetrates through the bottom heat preservation shell 12, and a support leg frame 16 is fixedly installed on the outside of the bottom heat preservation shell 12.

[0038] In this embodiment, the upper end of the rotating rod 5 penetrates through the sealing top cover 2 and is fixedly connected to the rotating shaft of the drive motor 4. The rotating rod 5 and the winding and feeding connecting rod 7 rotate synchronously, and the drive motor 4 drives the rotating rod 5 and the winding and feeding connecting rod 7 to rotate simultaneously.

[0039] In this embodiment, as a further solution of the present invention, the top refrigeration pipe 13 and the bottom refrigeration pipe 14 are located outside the winding and feeding connecting rod 7 and the winding and feeding blades 8. The discharge pipe 9 communicates with the inside of the removal tank body 1. The discharge pipe 9 is located below the rotating rod 5 and the winding and feeding connecting rod 7, and the discharge pipe 9 is used to discharge propane and dimethyl ether in the removal tank body 1.

[0040] It should be noted that the present invention is a high-efficiency dimethyl ether removal system and method for propane. When in use, the support leg frame 16 plays an overall placement and support effect. After opening the movable door 3 on the sealed top cover 2, propane is input into the removal tank 1 through the movable door 3. By connecting the input refrigerant pipeline with the conveying seat 15, the refrigerant enters the top refrigeration pipe 13 and the bottom refrigeration pipe 14 from the conveying seat 15. The top refrigeration pipe 13 and the bottom refrigeration pipe 14 are in contact with the removal tank 1 to perform low-temperature refrigeration on the inside of the removal tank 1. After the inside of the removal tank 1 generates low temperature, the boiling point of propane is -42°C, while the boiling point of dimethyl ether is -24.8°C. By utilizing the boiling point difference between propane and dimethyl ether, the separation of dimethyl ether and propane is achieved. Dimethyl ether is concentrated at the bottom of the tower due to its higher boiling point, while propane is concentrated above dimethyl ether. Therefore, when the discharge pipe 9 is opened, dimethyl ether is discharged first, and then propane is discharged, realizing the removal of dimethyl ether from propane;

[0041] When the top refrigeration pipe 13 and the bottom refrigeration pipe 14 perform low-temperature refrigeration on the removal tank 1, the top heat preservation shell 11 and the bottom heat preservation shell 12 are sleeved outside the top refrigeration pipe 13 and the bottom refrigeration pipe 14, playing a heat preservation effect. Moreover, the top refrigeration pipe 13 and the bottom refrigeration pipe 14 do not directly contact propane, and perform low-temperature refrigeration on the removal tank 1, with more uniform temperature dissipation;

[0042] The top refrigeration pipe 13 and the bottom refrigeration pipe 14 cool the bottom of the removal tank 1, causing the low temperature to concentrate at the bottom position inside the removal tank 1. Then, the operation of the driving motor 4 drives the rotation of the rotating rod 5 and the winding connecting rod 7, thereby driving the rotation of the removal stirring frame 6 and the winding blades 8. Therefore, the dimethyl ether in propane is separated at the bottom of the removal tank 1. The removal stirring frame 6 and the winding blades 8 stir propane differently, and the unseparated propane continuously contacts the low temperature at the bottom of the removal tank 1, suspends and rises after separating dimethyl ether, increasing the efficiency of removing dimethyl ether from propane;

[0043] After the test tube in the extraction box 1 is extracted, the push rod 28 is inserted into the expansion box 21, so that one end of the push rod 28 fits against the docking column 9. Then, the push rod 28 pushes the base plate 8 to move to one side through the docking column 9. The base plate 8 in the expansion box 21 then pushes the base plate 8 in the extraction box 1 to move to one side through the connection of the docking column 9. Finally, the base plate 8 in the extraction box 1 passes through the self-closing side door 16 and moves out to the outside, and the base plate 8 in the expansion box 21 moves into the extraction box 1, removing the extracted test tube from the extraction box 1 and putting the test tube to be extracted into the extraction box 1.

Claims

1. A system for efficiently removing dimethyl ether from propane, comprising a removal tank body (1), a sealing top cover (2), a driving motor (4), a rotating rod (5) and a removal stirring frame (6), wherein the sealing top cover (2) is fixedly mounted on the upper end of the removal tank body (1), the driving motor (4) is fixedly mounted on the upper end of the sealing top cover (2), the rotating rod (5) is movably mounted inside the removal tank body (1), and the removal stirring frame (6) is fixedly mounted on the outer side of the rotating rod (5), characterized in that: A discharge pipe (9) is fixedly installed on the bottom of the outer side of the removal tank body (1), a rolling connecting rod (7) is fixedly installed on the lower end of the rotating rod (5), a rolling blade (8) is welded on the outer side of the rolling connecting rod (7), and a heating structure (10) is wrapped around the lower side of the outer side of the removal tank body (1).

2. The system for efficiently removing dimethyl ether from propane according to claim 1, characterized in that: The upper end of the sealing top cover (2) is located on one side of the driving motor (4) and is movably mounted with a movable cover door (3), and the movable cover door (3) is connected to the interior of the removal tank body (1).

3. The system for efficiently removing dimethyl ether from propane according to claim 1, characterized in that: The upper end of the sealing top cover (2) is located behind the driving motor (4) and is fixedly mounted with a ladder (17), which extends to the rear of the removal tank body (1).

4. The system for efficiently removing dimethyl ether from propane according to claim 1, characterized in that: The driving motor (4) is composed of a gearbox and a motor. The driving motor (4) is arranged vertically with the stripping and stirring frame (6) and the rolling blade (8). The stripping and stirring frame (6) is located above the rolling blade (8).

5. The system for efficiently removing dimethyl ether from propane according to claim 1, characterized in that: The heating structure (10) comprises a top insulation shell (11), a bottom insulation shell (12), a top refrigeration pipe (13), a bottom refrigeration pipe (14) and a conveying seat (15); the top insulation shell (11) and the bottom insulation shell (12) are sleeved on the outside of the removal tank body (1), and the top insulation shell (11) is located above the bottom insulation shell (12) and is integrally connected thereto; the top refrigeration pipe (13) and the bottom refrigeration pipe (14) are fixedly installed on the inner sides of the top insulation shell (11) and the bottom insulation shell (12), and the top refrigeration pipe (13) is located above the bottom refrigeration pipe (14) and is fixedly connected thereto; and the conveying seat (15) is fixedly installed on one end of the top refrigeration pipe (13) and the bottom refrigeration pipe (14).

6. The system for efficiently removing dimethyl ether from propane according to claim 5, characterized in that: The top refrigeration pipe (13) and the bottom refrigeration pipe (14) are in contact with the outer wall of the removal tank body (1); the ends of the top refrigeration pipe (13) and the bottom refrigeration pipe (14) both pass downward through the bottom insulation shell (12); the conveying seat (15) is located outside the bottom insulation shell (12); the discharge pipe (9) passes through the bottom insulation shell (12); and a supporting bracket (16) is fixedly installed on the outer side of the bottom insulation shell (12).

7. The system for efficiently removing dimethyl ether from propane according to claim 5, characterized in that: The upper end of the rotating rod (5) passes through the sealing top cover (2) and is fixedly connected to the rotating shaft of the driving motor (4), and the rotating rod (5) and the winding connecting rod (7) rotate synchronously.

8. The system for efficiently removing dimethyl ether from propane according to claim 1, characterized in that: The top refrigeration pipe (13) and the bottom refrigeration pipe (14) are located outside the winding connecting rod (7) and the winding blade (8), and the discharge pipe (9) is connected to the inside of the removal tank (1), and the discharge pipe (9) is located below the rotating rod (5) and the winding connecting rod (7).

9. A method for using the system for efficiently removing dimethyl ether from propane as claimed in any one of claims 1 to 8, characterized in that: The method specifically comprises the following steps: Step 1: The support legs (16) play the role of supporting the whole device. After the movable cover door (3) on the sealed top cover (2) is opened, propane is put into the removal tank body (1) through the movable cover door (3). The conveying seat (15) is used to connect the input refrigerant liquid pipeline, so that the refrigerant liquid enters the top refrigerant pipe (13) and the bottom refrigerant pipe (14) from the conveying seat (15). The top refrigerant pipe (13) and the bottom refrigerant pipe (14) are in contact with the removal tank body (1) to perform low-temperature refrigeration in the removal tank body (1); Step 2: After the removal tank (1) generates low temperature, the boiling point of propane is -42°C, while the boiling point of dimethyl ether is -24.8°C. The difference in boiling points between propane and dimethyl ether is used to separate dimethyl ether from dimethyl ether. Since dimethyl ether has a higher boiling point, it is concentrated at the bottom of the tower, while propane is concentrated in the upper layer of dimethyl ether. Therefore, when the discharge pipe (9) is opened, dimethyl ether is discharged first, and then propane is discharged, thereby removing dimethyl ether from propane. Step 3: When the top refrigeration tube (13) and the bottom refrigeration tube (14) perform low-temperature refrigeration on the removal tank body (1), the top insulation shell (11) and the bottom insulation shell (12) are sleeved on the outside of the top refrigeration tube (13) and the bottom refrigeration tube (14), thereby achieving a heat preservation effect. Furthermore, the top refrigeration tube (13) and the bottom refrigeration tube (14) are not in direct contact with propane, so that the removal tank body (1) is subjected to low-temperature refrigeration, and the temperature distribution is more uniform. Step 4: The top refrigeration pipe (13) and the bottom refrigeration pipe (14) cool the bottom of the removal tank body (1), so that the low temperature is concentrated at the bottom position of the removal tank body (1), and then the operation of the driving motor (4) drives the rotating rod (5) and the winding connecting rod (7) to rotate, thereby driving the removal stirring frame (6) and the winding blade (8) to rotate, so that the dimethyl ether in the propane is separated at the bottom of the removal tank body (1). The removal stirring frame (6) and the winding blade (8) stir the propane differently, and the unseparated propane keeps contacting the low temperature at the bottom of the removal tank body (1). After the dimethyl ether is separated, it is suspended and rises again, thereby increasing the efficiency of removing dimethyl ether from the propane.

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