Recovery processing system for continuous rectification steam permeation

Abstract

The utility model belongs to the technical field of dehydration recovery equipment, and particularly relates to a continuous rectification steam permeation recovery processing system which comprises a rectification tower and a membrane separation unit, a gas outlet is formed in the top of the rectification tower, and the gas outlet is sequentially connected with pressure regulation equipment and heat exchange equipment; the membrane separation unit is provided with a material inlet, a permeate outlet and a retentate outlet, the permeate outlet is connected with a permeate treatment assembly, a heat exchange mechanism is further arranged in the rectifying tower, and one end of the inlet of the heat exchange mechanism is connected with the retentate outlet; wherein the heat exchange mechanism comprises a one-to-multiple adapter mounted on the side surface of the rectifying tower and a plurality of heat exchange pipes mounted in the rectifying tower in an S shape from top to bottom, and the heat exchange pipes are respectively connected with the one-to-multiple adapter; the one-to-multiple adapter is mounted on the side surface of the rectifying tower, and the S-shaped heat exchange pipes are adopted to recover the heat energy of the retentate, so that the heat transfer efficiency and the distribution uniformity are effectively improved, and the utilization of the heat energy is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of dehydration recovery equipment, in particular to a recovery and processing system for continuous distillation steam penetration. Background Art

[0002] Continuous distillation steam permeation technology is a comprehensive process that combines continuous distillation and steam permeation membrane separation technology. It has the effects of improving separation efficiency, reducing energy consumption, and being environmentally friendly and energy-saving. It is an efficient and environmentally friendly separation process.

[0003] For example, Chinese patent application number (CN202011030692.6) discloses a method for recovering 2-methyltetrahydrofuran by continuous distillation steam permeation, which includes a separation tower for continuous distillation, a pressure regulating device, a heat exchange device and a membrane separation component. The permeate in the membrane separation component is processed by a permeate component, and the retentate is returned to the bottom of the separation tower for heat exchange with the material, and the heat source of the retentate is recovered to achieve heating of the material. However, when the retentate is returned to the separation tower, a heat exchange tube structure as shown in the drawing of its specification is adopted, but its heat exchange efficiency is low, and the heat exchange tubes are unevenly distributed, which needs to be improved. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems and provide a continuous distillation steam permeation recovery and treatment system, which achieves the effect of heat energy recovery and utilization with high efficiency and uniform distribution.

[0005] In view of this, the present invention provides a continuous distillation steam permeation recovery and treatment system, comprising:

[0006] A distillation tower has a gas outlet at the top, and the gas outlet is connected to a pressure regulating device and a heat exchange device in sequence;

[0007] The membrane separation unit is provided with a material inlet, a permeate outlet and a retentate outlet;

[0008] a permeate treatment component connected to the permeate outlet of the membrane separation unit;

[0009] A heat exchange mechanism is installed in the distillation tower, and one inlet end of the heat exchange mechanism is connected to the retentate outlet.

[0010] Among them, the heat exchange mechanism includes a one-turn multi-turn joint installed on the side of the distillation tower and multiple heat exchange tubes installed in the distillation tower in an S shape from top to bottom, and the multiple heat exchange tubes are respectively connected to the one-turn multi-turn joint.

[0011] In the above technical solution, further:

[0012] The plurality of heat exchange tubes are arranged at equal intervals, and a first flow guide channel is formed between two adjacent heat exchange tubes.

[0013] In the above technical solution, further, the heat exchange mechanism also includes:

[0014] A plurality of heat-conducting baffles are provided and staggeredly installed in the distillation tower, and an S-shaped second flow guide channel is formed in the distillation tower;

[0015] The heat-conducting partition includes two sub-clamping plates, and the two sub-clamping plates are arranged in parallel on the surface of the heat exchange tube.

[0016] In the above technical solution, further:

[0017] The ends of the plurality of heat-conducting partitions away from the inner wall of the distillation tower are all arranged to be tilted downward.

[0018] In the above technical solution, further comprising:

[0019] There are multiple valves, which are respectively arranged on one side of multiple heat exchange tubes close to the one-turn multi-turn joint and are used to open and close the heat exchange tubes.

[0020] In the above technical solution, further comprising:

[0021] The heat insulation cover is installed on the side of the distillation tower and is used to wrap the parts of the multiple heat exchange tubes located on the outer surface of the distillation tower.

[0022] In the above technical solution, further:

[0023] A reflux port is provided on the side of the top of the distillation tower, and one end of the outlet of the heat exchange mechanism is connected to the reflux port;

[0024] Wherein, a distributor is provided between one end of the heat exchange mechanism outlet and the reflux port.

[0025] The beneficial effects of the utility model are:

[0026] 1. By installing a multi-turn joint on the side of the distillation tower and using multiple S-shaped heat exchange tubes to recover the heat energy of the retentate, the heat transfer efficiency and distribution uniformity are effectively improved, ensuring the utilization of heat energy;

[0027] 2. The first flow guide channel formed between two adjacent heat exchange tubes can ensure the liquid material falls and the gaseous material rises;

[0028] 3. The second flow channel formed by the heat-conducting baffle can improve the falling stroke of the liquid material, ensure the heat exchange efficiency, ensure the recovery and utilization of heat energy, and enable the material and the heat exchange tube to ensure sufficient contact heat transfer and uniform heat transfer;

[0029] 4. The inclined heat-conducting baffle can ensure the downward flow of liquid materials and avoid the accumulation of liquid materials;

[0030] 5. By setting a valve at one end of the inlet of each heat exchange tube, it is easy to control the opening and closing of the heat exchange tube. When the amount of retentate is small, the heat exchange tube is opened at intervals to ensure the uniformity of the recovered heat energy and the heat transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of the utility model;

[0032] Figure 2 It is a structural diagram of the distillation tower of the utility model;

[0033] Figure 3 This is an axial cross-sectional view of the distillation tower of the present invention;

[0034] Figure 4 It is a radial cross-sectional view of the distillation tower of the utility model;

[0035] The markings in the figure are as follows: 1. Distillation tower; 2. Gas outlet; 3. Pressure regulating device; 4. Heat exchange equipment; 5. Membrane separation unit; 6. Material inlet; 7. Permeate outlet; 8. Retentate outlet; 9. Permeate treatment component; 10. Heat exchange mechanism; 100. One-to-multi-turn joint; 101. Heat exchange tube; 102. Heat-conducting partition; 1020. Sub-clamp; 11. First guide channel; 12. Second guide channel; 13. Valve; 14. Heat insulation cover; 15. Reflux port; 16. Distributor. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0037] Example 1:

[0038] This embodiment provides a continuous distillation steam permeation recovery and processing system, comprising:

[0039] A distillation tower 1 is provided with a gas outlet 2 at the top of the tower, and the gas outlet 2 is connected in sequence to a pressure regulating device 3 and a heat exchange device 4;

[0040] The membrane separation unit 5 is provided with a material inlet 6, a permeate outlet 7 and a retentate outlet 8;

[0041] a permeate treatment assembly 9 connected to the permeate outlet 7 of the membrane separation unit 5;

[0042] The heat exchange mechanism 10 is installed in the distillation tower 1, and one inlet end is connected to the retentate outlet 8;

[0043] The heat exchange mechanism 10 includes a one-turn multi-turn joint 100 installed on the side of the distillation tower 1 and a plurality of heat exchange tubes 101 installed in an S-shape from top to bottom in the distillation tower 1, and the plurality of heat exchange tubes 101 are respectively connected to the one-turn multi-turn joint 100;

[0044] At the same time, the distillation tower 1 is further provided with a feed inlet in the tower and a discharge port at the bottom of the tower, and a reboiler is further connected to the bottom of the distillation tower 1 for heating the material at the bottom of the distillation tower 1, and the heat exchange mechanism 10 can be used as a preheating mechanism for the falling liquid material, ensuring full utilization of the heat energy, reducing the energy consumption of the reboiler to a certain extent, and achieving energy-saving effect;

[0045] Furthermore, the inflection points of the S-shaped heat exchange tubes 101 extend to the inner wall of the distillation tower 1;

[0046] The specific structures of the pressure regulating device 3, the heat exchange device 4, the membrane separation unit 5 and the permeate treatment component 9 are all existing technologies and will not be described here in detail.

[0047] As can be seen from this embodiment, by installing a multi-turn joint 100 on the side of the distillation tower 1 and using multiple S-shaped heat exchange tubes 101 to recover the heat energy of the retentate, the heat transfer efficiency and distribution uniformity are effectively improved, thereby ensuring the utilization of heat energy.

[0048] The inflection point of the S-shaped heat exchange tube 101 extends to the inner wall of the distillation tower 1, which can further ensure the uniformity of heat transfer and ensure uniform heat transfer to the falling liquid material.

[0049] Example 2:

[0050] This embodiment provides a continuous distillation steam permeation recovery and treatment system, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0051] The plurality of heat exchange tubes 101 are arranged at equal intervals, and a first flow guiding channel 11 is formed between two adjacent heat exchange tubes 101 .

[0052] It can be seen from this embodiment that the first guide channel 11 formed between two adjacent heat exchange tubes 101 can ensure that the liquid material falls and the gaseous material rises.

[0053] Example 3:

[0054] This embodiment provides a continuous distillation steam permeation recovery and treatment system. In addition to the technical solutions of the above embodiments, it also has the following technical features. The heat exchange mechanism 10 also includes:

[0055] There are multiple heat-conducting baffles 102, which are staggered and installed in the distillation tower 1, and form an S-shaped second flow guide channel 12 in the distillation tower 1;

[0056] The heat-conducting baffle 102 includes two sub-clamping plates 1020 , and the two sub-clamping plates 1020 are arranged in parallel on the surface of the heat exchange tube 101 ;

[0057] At the same time, the heat-conducting partition 102 can be made of a metal material with good heat-conducting effect, such as copper or aluminum.

[0058] As can be seen from this embodiment, the provision of the heat-conducting baffles 102 can ensure uniform heat conduction to the falling liquid material, and the staggered installation can form an S-shaped second guide channel 12, thereby extending the heat transfer time between the falling liquid material and the heat-conducting baffles 102, ensuring heat transfer efficiency and uniformity.

[0059] The heat-conducting baffle 102 is configured as two sub-clamps 1020 and is arranged parallel to the surface of the heat exchange tube 101, so that the bottom surface of the heat-conducting baffle 102 can insulate the rising gaseous material to prevent the rising gaseous material from turning into liquid material due to temperature drop.

[0060] Example 4:

[0061] This embodiment provides a continuous distillation steam permeation recovery and treatment system, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0062] The ends of the plurality of heat-conducting partitions 102 away from the inner wall of the distillation tower 1 are all arranged to be tilted downward.

[0063] It can be seen from this embodiment that by tilting the plurality of heat-conducting baffles 102 downward, the falling liquid material can be promoted to flow on the surface of the heat-conducting baffles 102, thereby preventing the liquid material from accumulating on the heat-conducting baffles 102 and ensuring uniform heat transfer.

[0064] Example 5:

[0065] This embodiment provides a continuous distillation steam permeation recovery and treatment system. In addition to the technical solutions of the above embodiments, it also has the following technical features, including:

[0066] There are multiple valves 13, each of which is disposed on one side of the heat exchange tubes 101 close to the multi-turn joint 100 and is used to open and close the heat exchange tubes 101;

[0067] The valve 13 may be a solenoid valve, which can be opened and closed by remote control, thereby improving switching efficiency and accuracy.

[0068] It can be seen from this embodiment that by providing a valve 13 at one end of the inlet of each heat exchange tube 101, it is easy to control the opening and closing of the heat exchange tube 101. When the amount of retentate is small, the heat exchange tube 101 is opened at intervals, which can ensure the uniformity of the utilization of recovered heat energy and the heat transfer efficiency.

[0069] Example 6:

[0070] This embodiment provides a continuous distillation steam permeation recovery and treatment system. In addition to the technical solutions of the above embodiments, it also has the following technical features, including:

[0071] The heat insulation cover 14 is installed on the side of the distillation tower 1 and is used to wrap the parts of the plurality of heat exchange tubes 101 located on the outer surface of the distillation tower 1.

[0072] It can be seen from this embodiment that the use of a one-turn multi-turn joint 100 will increase the contact area between the heat exchange tube 101 exposed on the outer surface of the distillation tower 1 and the external environment. Therefore, by setting the heat insulation cover 14, heat loss of this part of the heat exchange tube 101 can be avoided, ensuring full utilization of heat, thereby improving the heat transfer efficiency in the distillation tower 1.

[0073] Example 7:

[0074] This embodiment provides a continuous distillation steam permeation recovery and treatment system, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0075] A reflux port 15 is provided on the top side of the distillation tower 1, and one outlet end of the heat exchange mechanism 10 is connected to the reflux port 15;

[0076] A distributor 16 is provided between one outlet end of the heat exchange mechanism 10 and the reflux port 15 .

[0077] It can be seen from this embodiment that the finished product material after heat recovery is introduced into the distributor 16 and a part of it is refluxed to the distillation tower 1 to continue to participate in the reaction, which can ensure the control of material recovery quality and reaction efficiency.

[0078] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A continuous distillation steam permeation recovery and treatment system, characterized in that: include: A distillation tower (1) is provided with a gas outlet (2) at the top of the tower, and the gas outlet (2) is sequentially connected to a pressure regulating device (3) and a heat exchange device (4); The membrane separation unit (5) is provided with a material inlet (6), a permeate outlet (7) and a retentate outlet (8); a permeate treatment assembly (9) connected to the permeate outlet (7) of the membrane separation unit (5); A heat exchange mechanism (10) is installed in the distillation tower (1), and one inlet end is connected to the retentate outlet (8); The heat exchange mechanism (10) comprises a one-turn multi-turn joint (100) installed on the side of the distillation tower (1) and a plurality of heat exchange tubes (101) installed in an S-shape from top to bottom in the distillation tower (1), and the plurality of heat exchange tubes (101) are respectively connected to the one-turn multi-turn joint (100).

2. The continuous distillation steam permeation recovery and treatment system according to claim 1, characterized in that: The plurality of heat exchange tubes (101) are arranged at equal intervals, and a first flow guide channel (11) is formed between two adjacent heat exchange tubes (101).

3. The continuous distillation steam permeation recovery and treatment system according to claim 2, characterized in that: The heat exchange mechanism (10) further comprises: A plurality of heat-conducting baffles (102) are provided and staggeredly installed in the distillation tower (1), and an S-shaped second flow guide channel (12) is formed in the distillation tower (1); The heat-conducting partition (102) comprises two sub-clamping plates (1020), and the two sub-clamping plates (1020) are arranged in parallel on the surface of the heat exchange tube (101).

4. The continuous distillation steam permeation recovery and treatment system according to claim 3, characterized in that: The ends of the plurality of heat-conducting partitions (102) away from the inner wall of the distillation tower (1) are all arranged to be tilted downward.

5. The continuous distillation steam permeation recovery and treatment system according to claim 2, characterized in that: Also includes: The valves (13) are provided in plurality and are respectively arranged on one side of the plurality of heat exchange tubes (101) close to the one-turn multi-turn joint (100), and are used for opening and closing the heat exchange tubes (101).

6. The continuous distillation steam permeation recovery and treatment system according to claim 2, characterized in that: Also includes: The heat insulation cover (14) is installed on the side of the distillation tower (1) and is used to wrap the parts of the plurality of heat exchange tubes (101) located on the outer surface of the distillation tower (1).

7. The continuous distillation steam permeation recovery and treatment system according to claim 1, characterized in that: A reflux port (15) is provided on the side surface of the top of the distillation tower (1), and one end of the outlet of the heat exchange mechanism (10) is connected to the reflux port (15); Wherein, a distributor (16) is provided between one end of the outlet of the heat exchange mechanism (10) and the reflux port (15).

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