A main distillation tower for gas cryogenic separation equipment

Abstract

The utility model provides a main distillation tower for gas cryogenic separation equipment. The main distillation tower for gas cryogenic separation equipment comprises: a tower body, a conical partition plate is fixedly installed in the tower body, the conical partition plate divides the tower body into a first distillation zone and a second distillation zone, a conducting pipe is fixedly installed on the top of the conical partition plate, an inlet pipe and a liquid discharge pipe are fixedly installed on the outer wall of the tower body, a first valve is fixedly installed on the liquid discharge pipe, an exhaust pipe is fixedly installed on the outer wall of the tower body, one end of the exhaust pipe extends into the tower body, a rotating column is arranged in the tower body, a plurality of rotating plates are fixedly installed on the rotating column, and a driving motor is fixedly installed at the bottom of the tower body. The main distillation tower for gas cryogenic separation equipment provided by the utility model can perform secondary distillation on liquid gas, improve the distillation effect, and can improve the heat exchange efficiency of liquid gas and the separation speed.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas cryogenic separation, and in particular relates to a main distillation tower used for gas cryogenic separation equipment. Background Art

[0002] A distillation tower is a tower-type gas-liquid contact device for distillation. By utilizing the different volatilities of the components in the mixture, that is, the different vapor pressures of the components at the same temperature, the light components (low-boiling substances) in the liquid phase are transferred to the gas phase, while the heavy components (high-boiling substances) in the gas phase are transferred to the liquid phase, thereby achieving the purpose of separation.

[0003] In the related art, a main distillation tower used in gas cryogenic separation equipment is disclosed, which relates to a main distillation tower. The device includes: a distillation tower body, two pressure nitrogen tower extraction pipes, a lower tower liquid nitrogen reflux pipe, a low-pressure heat exchanger, a boiling zone, a heat exchanger and a main condenser evaporator. According to the technical analysis of the influence of the pressure nitrogen extraction amount of the lower tower of the main distillation tower of air separation on the cooling factor of the air separation device, a solution is proposed for the problem of insufficient pressure nitrogen extraction: 1) raising the extraction pipe mouth away from the gas-liquid boiling zone to reduce droplet entrainment; 2) changing the single extraction port to a double extraction port to reduce the outlet flow rate. After the transformation, the stable adjustment of the air separation distillation working conditions is achieved, the operating parameters meet the design values, the influence of the fluctuation of the lower tower of the main distillation tower on the argon system is reduced, the low-temperature stress fatigue and strength damage of the low-pressure heat exchanger are eliminated, and the purpose of increasing the output of pressure nitrogen is achieved.

[0004] However, there are still some shortcomings in the above structure. When the device is used to distill liquid gas, the liquid gas accumulates in the distillation tower, the heat exchange rate is slow, and the gas can be distilled twice to improve the distillation effect.

[0005] Therefore, it is necessary to provide a new main distillation tower for gas cryogenic separation equipment to solve the above technical problems. Utility Model Content

[0006] The technical problem solved by the utility model is to provide a main distillation tower for gas cryogenic separation equipment which can perform secondary distillation on liquid gas, improve the distillation effect, improve the heat exchange efficiency of liquid gas, and improve the separation speed.

[0007] In order to solve the above technical problems, the utility model provides a main distillation tower for gas deep cold separation equipment, comprising: a tower body, a conical partition plate is fixedly installed in the tower body, the conical partition plate divides the tower body into a first distillation zone and a second distillation zone, a conducting pipe is fixedly installed on the top of the conical partition plate, an inlet pipe and a discharge pipe are fixedly installed on the outer wall of the tower body, a first valve is fixedly installed on the discharge pipe, an exhaust pipe is fixedly installed on the outer wall of the tower body, one end of the exhaust pipe extends into the tower body, a rotating column is arranged in the tower body, a plurality of rotating plates are fixedly installed on the rotating column, a driving motor is fixedly installed at the bottom of the tower body, the output shaft of the driving motor is fixedly connected to the bottom of the rotating column, a liquid collecting box is fixedly installed at one end of the exhaust pipe, an air outlet pipe is fixedly installed on the outer wall of the liquid collecting box, a liquid collecting cavity is opened in the air outlet pipe, and a liquid outlet pipe is fixedly installed at the bottom of the liquid collecting cavity.

[0008] As a further solution of the utility model, an inclined surface is arranged in the liquid collecting chamber.

[0009] As a further solution of the utility model, mounting plates are provided in both the first distillation zone and the second distillation zone, and heat exchangers are installed on the tops of the two mounting plates.

[0010] As a further solution of the utility model, a V-shaped tube is fixedly installed on the outer wall of the tower body, two ends of the V-shaped tube extend into the first distillation zone and the second distillation zone respectively, and a second valve is fixedly installed on the V-shaped tube.

[0011] As a further solution of the utility model, four supporting legs are fixedly installed on the bottom of the tower body.

[0012] As a further solution of the utility model, a plurality of fixing rods are fixedly mounted on the mounting plate, and one end of the plurality of fixing rods is fixedly connected to the inner wall of the tower body.

[0013] Compared with the related art, the main distillation tower for gas cryogenic separation equipment provided by the utility model has the following beneficial effects:

[0014] 1. The utility model can improve the heat exchange rate of liquid and gas by setting a rotating column, a rotating plate and a driving motor, thereby improving the separation speed of gas;

[0015] 2. The utility model provides a first distillation zone and a second distillation zone, so that liquid gas can be distilled twice to improve the separation effect of gas;

[0016] 3. The utility model provides a liquid collecting chamber and an inclined surface, so that after the gas is discharged and liquefied, it can be prevented from flowing back into the tower body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] For the convenience of those skilled in the art to understand, the present utility model will be further described below with reference to the accompanying drawings.

[0018] Figure 1 It is a three-dimensional structure schematic diagram of the main rectification column for a gas cryogenic separation device provided by the present utility model;

[0019] Figure 2 It is a sectional structure schematic diagram of the main rectification column for a gas cryogenic separation device provided by the present utility model;

[0020] Figure 3 It is a partial sectional structure schematic diagram of the main rectification column for a gas cryogenic separation device provided by the present utility model;

[0021] Figure 4 It is a schematic diagram of the mechanism of the rotating column and the rotating plate in the present utility model.

[0022] In the figure: 1. Tower body; 2. Conical partition plate; 3. Conducting pipe; 4. Inlet pipe; 5. Drain pipe; 6. First valve; 7. Exhaust pipe; 8. Rotating column; 9. Rotating plate; 10. Driving motor; 11. Liquid collection tank; 12. Outlet gas pipe; 13. Liquid collection cavity; 14. Liquid outlet pipe; 15. Inclined surface; 16. Mounting plate; 17. Heat exchanger; 18. C-shaped pipe; 19. Second valve. Specific embodiments

[0023] Please refer to Figure 1 , Figure 2 and Figure 3 , where Figure 1 It is a front sectional structure schematic diagram of the main rectification column for a gas cryogenic separation device of the present utility model; Figure 2 is Figure 1 The enlarged structure schematic diagram of part A in; Figure 3The utility model is a schematic diagram of the side cross-sectional structure of a main distillation tower used in gas cryogenic separation equipment. The main distillation tower for gas cryogenic separation equipment comprises: a tower body 1, a conical partition plate 2 is fixedly installed in the tower body 1, the conical partition plate 2 divides the tower body 1 into a first distillation zone and a second distillation zone, a conducting pipe 3 is fixedly installed on the top of the conical partition plate 2, an inlet pipe 4 and a discharge pipe 5 are fixedly installed on the outer wall of the tower body 1, a first valve 6 is fixedly installed on the discharge pipe 5, an exhaust pipe 7 is fixedly installed on the outer wall of the tower body 1, one end of the exhaust pipe 7 extends into the tower body 1, a rotating column 8 is arranged in the tower body 1, a plurality of rotating plates 9 are fixedly installed on the rotating column 8, a driving motor 10 is fixedly installed at the bottom of the tower body 1, the output shaft of the driving motor 10 is fixedly connected to the bottom of the rotating column 8, a liquid collecting box 11 is fixedly installed at one end of the exhaust pipe 7, an air outlet pipe 12 is fixedly installed on the outer wall of the liquid collecting box 11, a liquid collecting cavity 13 is opened in the air outlet pipe 12, and a liquid outlet pipe 14 is fixedly installed at the bottom of the liquid collecting cavity 13.

[0024] like Figure 3 As shown, an inclined surface 15 is provided in the liquid collecting chamber 13 .

[0025] like Figure 2 As shown, a mounting plate 16 is disposed in each of the first distillation zone and the second distillation zone, and a heat exchanger 17 is mounted on the top of each of the two mounting plates 16 .

[0026] like Figure 2 As shown, a V-shaped tube 18 is fixedly installed on the outer wall of the tower body 1 , and both ends of the V-shaped tube 18 extend into the first distillation zone and the second distillation zone respectively. A second valve 19 is fixedly installed on the V-shaped tube 18 .

[0027] like Figure 1 and Figure 2 As shown, four supporting legs are fixedly installed at the bottom of the tower body 1.

[0028] like Figure 2 As shown, a plurality of fixing rods are fixedly mounted on the mounting plate 16 , and one end of each of the fixing rods is fixedly connected to the inner wall of the tower body 1 .

[0029] The working principle of the main distillation tower for gas cryogenic separation equipment provided by the utility model is as follows:

[0030] The mixed liquid gas is introduced into the first distillation zone through the inlet pipe 4, and the two heat exchangers 17 are started to exchange heat with the liquid gas through the heat exchanger 17. The drive motor 10 is started, and the drive motor 10 drives the rotating column 8 to rotate, and the rotating column 8 drives the rotating plate 9 to rotate, so that the liquid gas can quickly exchange heat, so that one of the liquid gases is vaporized and enters the second distillation zone through the conducting pipe 3, and the other remains in a liquid state. The first valve 6 can be opened to discharge through the drain pipe 5. After the gas entering the second distillation zone is distilled again, the gas enters the collecting box 11 through the exhaust pipe 7. If liquefaction occurs, it is discharged through the liquid outlet pipe 14 under the action of the inclined surface 15. If it is gas, it is discharged through the gas outlet pipe 12. The residual liquid gas in the second distillation zone can open the second valve 19 and flow back to the first distillation zone through the ring pipe 18.

[0031] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0032] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0033] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the attached claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A main distillation tower for gas cryogenic separation equipment, characterized in that: include: A tower body, wherein a conical partition plate is fixedly installed in the tower body, and the conical partition plate divides the tower body into a first distillation zone and a second distillation zone, a conducting pipe is fixedly installed on the top of the conical partition plate, an inlet pipe and a discharge pipe are fixedly installed on the outer wall of the tower body, a first valve is fixedly installed on the discharge pipe, an exhaust pipe is fixedly installed on the outer wall of the tower body, one end of the exhaust pipe extends into the tower body, a rotating column is arranged in the tower body, a plurality of rotating plates are fixedly installed on the rotating column, a driving motor is fixedly installed at the bottom of the tower body, an output shaft of the driving motor is fixedly connected to the bottom of the rotating column, a liquid collecting box is fixedly installed at one end of the exhaust pipe, an air outlet pipe is fixedly installed on the outer wall of the liquid collecting box, a liquid collecting cavity is opened in the air outlet pipe, and a liquid outlet pipe is fixedly installed at the bottom of the liquid collecting cavity.

2. The main distillation tower for gas cryogenic separation equipment according to claim 1, characterized in that: An inclined surface is arranged in the liquid collecting chamber.

3. The main distillation tower for gas cryogenic separation equipment according to claim 1, characterized in that: The first distillation zone and the second distillation zone are both provided with mounting plates, and heat exchangers are installed on the tops of the two mounting plates.

4. The main distillation tower for gas cryogenic separation equipment according to claim 1, characterized in that: A V-shaped tube is fixedly installed on the outer wall of the tower body, and two ends of the V-shaped tube extend into the first distillation zone and the second distillation zone respectively. A second valve is fixedly installed on the V-shaped tube.

5. The main distillation tower for gas cryogenic separation equipment according to claim 1, characterized in that: Four supporting legs are fixedly installed at the bottom of the tower body.

6. The main distillation tower for gas cryogenic separation equipment according to claim 3, characterized in that: A plurality of fixing rods are fixedly mounted on the mounting plate, and one end of each of the fixing rods is fixedly connected to the inner wall of the tower body.

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