Ultralow-temperature helium-neon efficient separation device

Abstract

The utility model discloses an ultralow-temperature helium-neon high-efficiency separation device, relates to the technical field of rectifying towers, and aims to solve the problems that the conventional rectifying tower mainly adopts the matching of steam and a reboiler to realize temperature rise, but the temperature can be slowly controlled only by stopping heating when the temperature is overhigh, and the precision is lower. The rectifying tower kettle is mounted at the upper end of the reboiling kettle, a distillation gas discharge pipe is mounted at the upper end of the rectifying tower kettle, and a condenser is mounted at one end of the distillation gas discharge pipe; the interlayer is arranged on the outer side of the reboiling kettle, a plurality of electric heating pipes are installed on the inner wall of the interlayer, a temperature control coil pipe is installed in the interlayer, the two ends of the temperature control coil pipe penetrate through and extend to the exterior of the interlayer, a heating medium inlet valve is installed at the upper end of one side of the reboiling kettle, and a heating medium outlet valve is installed at the lower end of the other side of the reboiling kettle. And a heating medium discharge valve is mounted at the lower end of one side of the reboiling kettle.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation towers, in particular to an ultra-low temperature helium-neon high-efficiency separation device. Background Art

[0002] A distillation tower is a tower-type vapor-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, and the heavy components (high-boiling substances) in the gas phase are transferred to the liquid phase, thereby achieving the purpose of separation. The distillation tower is also a mass transfer and heat transfer device that is widely used in petrochemical production.

[0003] Neon and helium are rare gases. The boiling point of neon is -246℃ and the boiling point of helium is -268.9℃. The environmental conditions for separating the two are relatively harsh, but the purity requirements for their use are often high. The extraction is difficult, so the economic value is high. Improving the separation purity of the two will increase the profit of the product.

[0004] However, the current distillation tower mainly uses steam and reboilers to achieve temperature increase, but when the temperature exceeds the limit, the temperature can only be slowly controlled by stopping heating, and the accuracy is low. Therefore, we propose an ultra-low temperature helium-neon high-efficiency separation device to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an ultra-low temperature helium-neon high-efficiency separation device to solve the problem in the above-mentioned background technology that the existing distillation tower mainly adopts steam and reboiler to achieve temperature increase, but when over-temperature occurs, the temperature can only be slowly controlled by stopping heating, resulting in low accuracy.

[0006] To achieve the above object, the utility model provides the following technical solution: an ultra-low temperature helium-neon high-efficiency separation device, comprising a reboiler, a discharge valve is installed at the lower end of the reboiler;

[0007] Also includes:

[0008] A distillation tower kettle, which is installed at the upper end of the reboiler, a distillation gas discharge pipe is installed at the upper end of the distillation tower kettle, and a condenser is installed at one end of the distillation gas discharge pipe;

[0009] An interlayer is arranged outside the reboiler, an electric heating tube is installed on the inner wall of the interlayer, and a plurality of electric heating tubes are arranged, a temperature control coil is installed inside the interlayer, and both ends of the temperature control coil penetrate and extend to the outside of the interlayer, a heating medium inlet valve is installed at the upper end of one side of the reboiler, and a heating medium discharge valve is installed at the lower end of one side of the reboiler;

[0010] A temperature sensor is installed on one side of the lower end of the reboiler, and a detection end of the temperature sensor penetrates and extends into the interior of the reboiler.

[0011] Preferably, an electric control box is installed on the outer wall of one side of the reboiler, and the output end of the electric control box is electrically connected to the input end of the electric heating tube.

[0012] Preferably, the upper end of one side of the distillation tower kettle is arranged at the raw material inlet, the lower end of the other side of the distillation tower kettle is arranged at the steam inlet, and the upper end of the other side of the distillation tower kettle is arranged at the reflux port.

[0013] Preferably, a plurality of trays are installed inside the distillation tower kettle.

[0014] Preferably, a distillation gas inlet is provided at the upper end of the condenser, and the steam inlet is connected to the distillation gas discharge pipe, a coolant inlet is provided at one end of the condenser, and a coolant outlet is provided at the other end of the condenser, heat exchange tube positioning plates are installed on both sides of the inside of the condenser, and a plurality of heat exchange tubes are installed between the heat exchange tube positioning plates, a liquid outlet is installed on one side of the lower end of the condenser, and a reflux pipe interface is installed on the other side of the lower end of the condenser.

[0015] Preferably, a plurality of fins are provided on the outer wall of the heat exchange tube.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model sets a sandwich structure in the reboiling kettle in which the temperature is raised by electric heating and the temperature is lowered by a temperature control coil. After the raw materials enter the reboiling kettle, the heating medium in the sandwich can be heated up by electric heating to make the raw materials azeotropically distilled. During the process, the temperature sensor can detect the temperature in the kettle in real time. When the temperature exceeds the preset threshold, the temperature sensor can feedback a signal to the controller. The controller stops the continued heating of the electric heating tube on the one hand, and controls the circulating water cooling equipment to pump normal temperature water into the temperature control coil of the sandwich on the other hand, so as to achieve the effect of rapid protection in the over-temperature state, facilitate accurate temperature control, and solve the problem that the current distillation tower mainly adopts steam and reboiler to achieve heating, but can only control the temperature slowly by stopping heating when over-temperature, and the accuracy is low.

[0018] 2. The distilled gas of the utility model can enter the condenser along the distilled gas discharge pipe at the top of the tower. After the gas enters between the heat exchange tube positioning plates on both sides along the distilled gas inlet, the ultra-low temperature refrigerant liquid is pumped into the coolant inlet to divert it into a number of heat exchange tubes to achieve the effect of ultra-low temperature condensation. A number of fins are arranged on the outer wall of the heat exchange tube. The fins increase the contact range between the heat exchange tube and the steam, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the reboiler of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the condenser of the utility model;

[0022] In the figure: 1. reboiling kettle; 2. distillation tower kettle; 3. steam inlet; 4. raw material inlet; 5. reflux port; 6. distillation gas discharge pipe; 7. condenser; 701. coolant inlet; 702. coolant outlet; 703. distillation gas inlet; 704. liquid outlet; 705. heat exchange tube positioning plate; 706. heat exchange tube; 707. fin; 708. reflux pipe interface; 8. discharge valve; 9. temperature sensor; 10. interlayer; 11. heating medium inlet valve; 12. heating medium discharge valve; 13. electric heating tube; 14. electric control box; 15. temperature control coil. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figure 1-3 , the utility model provides an embodiment: an ultra-low temperature helium-neon high-efficiency separation device, comprising a reboiler 1, a discharge valve 8 is installed at the lower end of the reboiler 1;

[0025] Also includes:

[0026] A distillation tower kettle 2 is installed at the upper end of the reboiler 1. A distillation gas discharge pipe 6 is installed at the upper end of the distillation tower kettle 2. A condenser 7 is installed at one end of the distillation gas discharge pipe 6.

[0027] The interlayer 10 is arranged outside the reboiler 1, and an electric heating tube 13 is installed on the inner wall of the interlayer 10, and a plurality of electric heating tubes 13 are arranged, and a temperature control coil 15 is installed inside the interlayer 10, and both ends of the temperature control coil 15 penetrate and extend to the outside of the interlayer 10, a heating medium inlet valve 11 is installed at the upper end of one side of the reboiler 1, and a heating medium discharge valve 12 is installed at the lower end of one side of the reboiler 1;

[0028] The temperature sensor 9 is installed on one side of the lower end of the reboiler 1 , and the detection end of the temperature sensor 9 penetrates and extends to the inside of the reboiler 1 .

[0029] See also Figure 2An electric control box 14 is installed on the outer wall of one side of the reboiler 1, and the output end of the electric control box 14 is electrically connected to the input end of the electric heating tube 13. The reboiler 1 adopts a heating medium inlet valve 11 to inject heating medium into the interlayer 10, and heats up by electric heating to control the temperature in the kettle.

[0030] See also Figure 1 The upper end of one side of the distillation tower kettle 2 is provided with a raw material inlet 4, the lower end of the other side of the distillation tower kettle 2 is provided with a steam inlet 3, and the upper end of the other side of the distillation tower kettle 2 is provided with a reflux port 5. The steam inlet 3 is used for initial heat supplementation to quickly make the temperature in the tower kettle reach the required range.

[0031] Furthermore, a plurality of trays are installed inside the distillation tower kettle 2 .

[0032] See also Figure 3 A distillation gas inlet 703 is provided at the upper end of the condenser 7, and the steam inlet 3 is connected to the distillation gas exhaust pipe 6, a cooling liquid inlet 701 is provided at one end of the condenser 7, and a cooling liquid outlet 702 is provided at the other end of the condenser 7, heat exchange tube positioning plates 705 are installed on both sides of the inside of the condenser 7, and a plurality of heat exchange tubes 706 are installed between the heat exchange tube positioning plates 705, a liquid outlet 704 is installed on one side of the lower end of the condenser 7, and a reflux pipe interface 708 is installed on the other side of the lower end of the condenser 7, after the gas enters between the heat exchange tube positioning plates 705 on both sides along the distillation gas inlet 703, the ultra-low temperature refrigerant liquid is pumped into the cooling liquid inlet 701, so that it is diverted into a plurality of heat exchange tubes 706, so as to achieve the effect of ultra-low temperature condensation, and the condensed liquid can be discharged from the liquid outlet 704, wherein part of the liquid is connected to the distillation tower kettle 2 through the reflux pipe interface 708 at a certain reflux ratio for reflux.

[0033] See also Figure 3 A plurality of fins 707 are provided on the outer wall of the heat exchange tube 706. The fins 707 increase the contact range between the heat exchange tube 706 and the steam, thereby improving the heat exchange efficiency.

[0034] Working principle: When in use, water vapor and raw materials are introduced into the distillation tower kettle 2 from the steam inlet 3 and the raw material inlet 4 respectively. The raw materials flowing into the bottom reboiler 1 are heated up by the electric heating of the heating medium in the interlayer 10, so that the raw materials are distilled azeotropically. During the process, the temperature sensor 9 can detect the temperature in the kettle in real time. When the temperature exceeds the preset threshold, the temperature sensor 9 can feedback the signal to the controller, which stops the continued heating of the electric heating tube 13 on the one hand, and controls the circulating water cooling device to pump normal temperature water into the temperature control coil 1 of the interlayer 10 on the other hand. 5, in order to achieve the effect of rapid protection in over-temperature state and facilitate accurate temperature control, the distilled gas enters the condenser 7 along the distilled gas discharge pipe 6 at the top of the tower, and the gas enters between the heat exchange tube positioning plates 705 on both sides along the distilled gas inlet 703, and then is pumped into the ultra-low temperature refrigerant liquid through the coolant inlet 701, so that it is diverted into several heat exchange tubes 706, so as to achieve the effect of ultra-low temperature condensation, and the condensed liquid can be discharged from the liquid outlet 704, and part of the liquid is connected to the distillation tower kettle 2 through the reflux pipe interface 708 at a certain reflux ratio for reflux.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An ultra-low temperature helium-neon high-efficiency separation device, comprising a reboiler (1), wherein a discharge valve (8) is installed at the lower end of the reboiler (1); Features: Also includes: A distillation tower kettle (2) is installed at the upper end of the reboiling kettle (1), a distillation gas discharge pipe (6) is installed at the upper end of the distillation tower kettle (2), and a condenser (7) is installed at one end of the distillation gas discharge pipe (6); An interlayer (10) is arranged on the outside of the reboiling kettle (1), an electric heating tube (13) is installed on the inner wall of the interlayer (10), and a plurality of electric heating tubes (13) are installed, a temperature control coil (15) is installed inside the interlayer (10), and both ends of the temperature control coil (15) pass through and extend to the outside of the interlayer (10), a heating medium inlet valve (11) is installed at the upper end of one side of the reboiling kettle (1), and a heating medium discharge valve (12) is installed at the lower end of one side of the reboiling kettle (1); A temperature sensor (9) is installed on one side of the lower end of the reboiling kettle (1), and a detection end of the temperature sensor (9) penetrates and extends into the interior of the reboiling kettle (1).

2. The ultra-low temperature helium-neon high-efficiency separation device according to claim 1, characterized in that: An electric control box (14) is installed on the outer wall of one side of the reboiler (1), and the output end of the electric control box (14) is electrically connected to the input end of the electric heating tube (13).

3. The ultra-low temperature helium-neon high-efficiency separation device according to claim 1 is characterized in that: The upper end of one side of the distillation tower kettle (2) is provided with a raw material inlet (4), the lower end of the other side of the distillation tower kettle (2) is provided with a steam inlet (3), and the upper end of the other side of the distillation tower kettle (2) is provided with a reflux port (5).

4. The ultra-low temperature helium-neon high-efficiency separation device according to claim 1, characterized in that: The distillation tower kettle (2) is internally provided with a tower plate, and a plurality of tower plates are provided.

5. The ultra-low temperature helium-neon high-efficiency separation device according to claim 1, characterized in that: The upper end of the condenser (7) is provided with a distillation gas inlet (703), and the steam inlet (3) is connected to the distillation gas discharge pipe (6); one end of the condenser (7) is provided with a cooling liquid inlet (701), and the other end of the condenser (7) is provided with a cooling liquid outlet (702); both sides of the interior of the condenser (7) are provided with heat exchange tube positioning plates (705), and a plurality of heat exchange tubes (706) are installed between the heat exchange tube positioning plates (705); one side of the lower end of the condenser (7) is provided with a liquid outlet (704), and the other side of the lower end of the condenser (7) is provided with a reflux pipe interface (708).

6. The ultra-low temperature helium-neon high-efficiency separation device according to claim 5, characterized in that: A plurality of fins (707) are arranged on the outer wall of the heat exchange tube (706).

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