High-boiling residue recovery system of rectifying tower

Abstract

The utility model discloses a high-boiling residue recovery system of a rectifying tower, which comprises a recovery tank provided with a processing cavity, a material inlet and a material outlet, the material inlet is communicated with a discharge port of the rectifying tower, and the material outlet is used for discharging materials generated in the processing cavity; at least part of the structure of the stirring assembly is arranged in the treatment cavity, and the stirring assembly is configured to stir the high-boiling residues discharged into the treatment cavity from the rectifying tower; and the cooling assembly is arranged on the recovery tank, and the cooling assembly is configured to cool the materials in the recovery tank. According to the high-boiling-point substance recovery system of the rectifying tower, the high-boiling-point substances output by the rectifying tower are conveyed to the recovery tank, the cooling assembly exchanges heat with the high-boiling-point substances in the recovery tank so that the high-boiling-point substances can be cooled and solid impurities can be separated out, valuable liquid-phase chlorosilane in the high-boiling-point substances cannot be hydrolyzed, and then the raw materials are recovered through solid-liquid separation operation; the waste of raw materials is avoided, so that the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a high-boiling-substance recovery system of a distillation tower. Background Art

[0002] A distillation tower is a device used to separate different components in a mixture. In the polysilicon industry, distillation towers are usually used to process and transport materials. That is, the raw materials are added to the distillation tower. The distillation tower uses the boiling point differences of each component to gradually separate the components in the mixture through heating and condensation cycles, thereby obtaining a high-purity product.

[0003] In the prior art, the separated high-boiling products are directly pumped to the slurry hydrolysis process, where impurities (such as aluminum salts) in the high-boiling products are precipitated as solids for further processing. However, the separated high-boiling products still contain some valuable raw materials (such as liquid chlorosilanes). During this process, these raw materials are hydrolyzed into solid waste, resulting in a waste of raw materials and increased production costs. Furthermore, the amount of solid waste increases, which in turn increases processing costs. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a system for recovering high-boiling products from a distillation tower. The system utilizes a cooling assembly that exchanges heat with the high-boiling products in the recovery tank to cool them down and precipitate solid impurities. This prevents hydrolysis of the liquid chlorosilane in the high-boiling products, allowing subsequent recovery of this raw material through solid-liquid separation, thereby avoiding waste and reducing production costs.

[0005] In view of this, an embodiment of the present invention provides a high-boiling-point material recovery system for a distillation tower, comprising: a recovery tank, the recovery tank being provided with a processing chamber and a material inlet and a material outlet connected to the processing chamber, the material inlet being connected to the discharge port of the distillation tower, and the material outlet being used to discharge the material generated in the processing chamber; a stirring component, at least part of the structure of the stirring component being arranged in the processing chamber, the stirring component being configured to stir the high-boiling-point material discharged from the distillation tower into the processing chamber; a cooling component being arranged in the recovery tank, the cooling component being configured to cool the material in the recovery tank.

[0006] The high-boiling-point recovery system of the distillation tower of the present invention transports the high-boiling-point output of the distillation tower to a recovery tank. The cooling component exchanges heat with the high-boiling-point in the recovery tank, causing the high-boiling-point to cool down and precipitate solid impurities. Since the hydrolysis reaction is not directly carried out, the liquid-phase chlorosilane does not undergo hydrolysis. This portion of raw material can be subsequently recovered through a solid-liquid separation operation, avoiding waste of raw materials and thus reducing production costs. After separation, the hydrolysis reaction is carried out again, and the liquid-phase chlorosilane does not participate in the hydrolysis reaction, which can also reduce the water consumption for the hydrolysis of the high-boiling-point. Moreover, some solid impurities generated by the hydrolysis of the liquid-phase chlorosilane are no longer generated, reducing the amount of solid impurities generated, thereby reducing the processing cost of the solid impurities. In addition, the stirring component stirs the high-boiling-point, so that the high-boiling-point in the recovery tank is fully in contact with the cooling component, uniformly exchanging heat, which is conducive to the cooling and crystallization of impurities in the high-boiling-point, thereby accelerating the processing efficiency.

[0007] In some embodiments, the stirring assembly includes: a drive member disposed in the recovery tank; and an agitator disposed in the processing chamber. The agitator includes a stirring shaft and a stirring head. The stirring shaft is in driving connection with the drive member, and the drive member drives the stirring head via the stirring shaft to rotate, thereby stirring the material in the recovery tank. The driving member drives the stirring head of the agitator to stir the material in the processing chamber, thereby achieving sufficient heat exchange between the material in the recovery tank and the cooling assembly, thereby improving heat exchange efficiency. The structure is simple, and the drive member and agitator are easy to install.

[0008] According to some embodiments of the present invention, the stirring head is located at the bottom of the processing chamber. Since high-boiling substances will cool down in the processing chamber and precipitate solid impurities, the precipitated solid impurities are compounds of heavy metal salts and will settle at the bottom of the processing chamber. After a long period of treatment, an impurity layer will form on the bottom wall of the processing chamber, and may even block the material outlet, which is not conducive to the continuous operation of the high-boiling substance recovery system of the distillation tower. By setting the stirring head at the bottom of the processing chamber, the material is stirred during the rotation of the stirring head, thereby preventing the material from settling and crystallizing and agglomerating at the bottom of the recovery tank, which leads to a reduction in the cooling efficiency of the high-boiling substances. In this way, the high-boiling substance recovery system of the distillation tower can continue to operate for a long time.

[0009] In some embodiments, the recovery tank comprises an outer shell and an inner shell, wherein the inner shell defines the processing chamber, and a cooling chamber is defined between the outer shell and the inner shell; the cooling assembly comprises a cooling device and a cooling pipeline, wherein the cooling device communicates with the cooling chamber via the cooling pipeline to supply a cooling medium into the cooling chamber. The cooling medium is fed into the cooling chamber along the cooling pipeline, where it exchanges heat with high-boiling materials in the processing chamber of the inner shell through the shell of the inner shell. The cooling medium does not directly contact the high-boiling materials, thereby preventing a reaction between the valuable raw material (liquid chlorosilane) in the high-boiling materials and the cooling medium, which could result in raw material loss. This raw material can then be recycled, thereby saving production costs.

[0010] Furthermore, the cooling medium includes cooling water. Cooling water has a high specific heat capacity and thermal conductivity, can effectively absorb the heat of high-boiling substances, and has high cooling efficiency. Furthermore, water resources are relatively abundant and inexpensive. Using water as a cooling medium can reduce the operating cost of the high-boiling substance recovery system of the distillation tower.

[0011] In some embodiments, the system further comprises a feed pipe assembly, the feed pipe assembly being connected to the material inlet and the discharge port of the distillation column. The feed pipe assembly is used to deliver high-boiling materials from the distillation column through the material inlet to the processing chamber of the recovery tank, thereby facilitating the delivery of high-boiling materials.

[0012] Furthermore, the feed pipe assembly includes a feed pipe body and a heating pipe body. The feed pipe body is connected to the material inlet and the discharge port, respectively. The heating pipe body is arranged side by side with the feed pipe body and extends parallel to the feed pipe body. A heating medium flows through the heating pipe body. The feed pipe body transports high-boiling materials, and the heating pipe body provides heat to the feed pipe body, maintaining a high temperature. This ensures that the high-boiling materials have sufficient heat during transportation within the feed pipe body, and prevents solid impurities from precipitating due to temperature drop and causing blockage of the feed pipe body. This helps ensure the continuous and stable operation of the high-boiling material recovery system of the distillation tower.

[0013] In some embodiments, the material inlet is located at the top of the recovery tank, and the material outlet is located at the bottom of the recovery tank. This arrangement allows solid impurities precipitated from the high-boiling material after processing within the recovery tank to be discharged under gravity, thus avoiding the formation of dead corners within the recovery tank that could cause the precipitated solid impurities to settle and affect the heat exchange efficiency between the high-boiling material and the cooling assembly.

[0014] In some embodiments, the system further comprises: a discharge pipeline connected to the material outlet; and a purge device in communication with the discharge pipeline for purging high-pressure gas into the discharge pipeline. Purging the high-pressure gas into the discharge pipeline via the purge device prevents deposition of material discharged from the recovery tank in the discharge pipeline, thereby facilitating the long-term stable operation of the high-boiling-point recovery system of the distillation tower.

[0015] Furthermore, the high-pressure gas includes nitrogen. In this configuration, nitrogen as an inert gas is introduced into the discharge pipeline to purge solid impurities, thereby preventing the nitrogen from reacting with the liquid chlorosilane to be recovered, thereby saving raw materials and reducing costs.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a piping diagram of a high-boiling-point recovery system of a distillation tower according to an embodiment of the present invention.

[0019] Reference numerals:

[0020] 100-High boiling point recovery system of distillation tower;

[0021] 110 - recovery tank; 110a - inner shell; 110b - outer shell; 110c - cooling chamber; 111 - processing chamber; 112 - material inlet; 113 - material outlet;

[0022] 120 - stirring assembly; 121 - driving member; 122 - stirrer; 122a - stirring shaft; 122b - stirring head;

[0023] 130-cooling assembly; 131-cooling pipeline;

[0024] 140- material delivery pipe assembly; 141- material delivery pipe body; 142- heating pipe body;

[0025] 150-Discharge pipe. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] During the production process of the existing distillation tower, the separated high-boiling products are directly transported to the slurry hydrolysis treatment stage through a machine pump. The valuable raw materials in the high-boiling products (such as liquid chlorosilane) will be hydrolyzed into solid waste, resulting in a waste of raw materials and an increase in production costs.

[0028] In view of this, an embodiment of the present invention provides a high-boiling-point material recovery system for a distillation tower, in which the high-boiling-point material output from the distillation tower is transported to a recovery tank, and a cooling component exchanges heat with the high-boiling-point material in the recovery tank to cool it down and precipitate solid impurities. The liquid phase chlorosilane of the high-boiling-point material does not undergo hydrolysis, and this portion of the raw material is subsequently recovered through a solid-liquid separation operation, thereby avoiding waste of raw materials and reducing production costs.

[0029] Reference below Figure 1, describing a high boiling point recovery system 100 of a distillation tower according to an embodiment of the present invention. The high boiling point recovery system 100 of a distillation tower may include: a recovery tank 110, a stirring component 120 and a cooling component 130.

[0030] The recovery tank 110 may include a processing chamber 111, a material inlet 112 and a material outlet 113, and the material inlet 112 and the material outlet 113 are respectively connected to the processing chamber 111, and the material inlet 112 is also connected to the discharge port of the distillation tower. The high-boiling substances output by the distillation tower enter the processing chamber 111 through the material inlet 112, and are discharged from the processing chamber 111 through the material outlet 113 after cooling treatment in the processing chamber 111.

[0031] At least part of the structure of the stirring assembly 120 (such as the stirring head 122b described later) is arranged in the processing chamber 111 to stir the high-boiling materials discharged from the distillation tower into the processing chamber 111, so that the high-boiling materials can be evenly heat-exchanged during the process of cooling and precipitating solid impurities, which is beneficial to the cooling, crystallization and precipitation of impurities in the high-boiling materials, thereby accelerating the processing efficiency.

[0032] The cooling assembly 130 is disposed in the recovery tank 110 to cool the material in the recovery tank 110. For example, a jacket is directly disposed on the outside of the recovery tank 110, through which a cooling medium circulates to remove heat from the material in the recovery tank 110. Alternatively, a coil is disposed inside or outside the recovery tank 110, through which a cooling medium circulates to remove heat from the material in the recovery tank 110. This lowers the temperature of the high-boiling materials in the processing chamber 111, causing impurities in the high-boiling materials to crystallize and precipitate.

[0033] The high-boiling-point recovery system 100 of the distillation tower of the present invention is that the impurities in the high-boiling point output of the distillation tower are close to the boiling point of the liquid-phase chlorosilane to be recovered, and it is difficult to separate them by continuing distillation. The solubility difference between the heavy metal salt (such as aluminum salt) in the impurities and the liquid-phase chlorosilane at different temperatures is utilized to make the impurities crystallize and precipitate as solid impurities, which is convenient for separation. The high-boiling point output of the distillation tower is transported to the recovery tank 110, and the stirring component 120 stirs the high-boiling point so that the high-boiling point in the recovery tank 110 is in full contact with the cooling component 130. The cooling component 130 evenly exchanges heat with the high-boiling point in the recovery tank 110, so that the high-boiling point is cooled and solid impurities are precipitated. Since the high-boiling point does not directly undergo a hydrolysis reaction, the liquid-phase chlorosilane in the high-boiling point does not undergo hydrolysis. This part of the raw material can be recovered later by a solid-liquid separation operation, avoiding the waste of raw materials, thereby reducing production costs. After separation, the hydrolysis reaction is carried out. Liquid chlorosilane does not participate in the hydrolysis reaction, which can also reduce the water consumption for the hydrolysis of high-boiling substances. In addition, some solid impurities produced by the hydrolysis of liquid chlorosilane are no longer generated, thereby reducing the amount of solid impurities generated and further reducing the treatment cost of solid impurities.

[0034] In some embodiments, the high-boiling-material recovery system 100 for the distillation column may further include a feed pipe assembly 140, which connects the material inlet 112 to the discharge port of the distillation column. Feed pipe assembly 140 delivers high-boiling materials from the distillation column through the material inlet 112 to the processing chamber 111 of the recovery tank 110, thereby facilitating efficient and convenient high-boiling-material transport.

[0035] Furthermore, the feed pipe assembly 140 may include a feed pipe body 141 and a heating pipe body 142. The feed pipe body 141 is connected to the material inlet 112 and the discharge port of the distillation column, respectively, and the feed pipe body 141 transports high-boiling materials to the recovery tank 110. The heating pipe body 142 is arranged side by side with the feed pipe body 141 and extends parallel to the direction in which the heating pipe body 142 and the feed pipe body 141 extend. A heating medium flows through the heating pipe body 142. The high-boiling materials output from the distillation column are relatively high in temperature. During the process of being transported to the recovery tank 110 through the feed pipe body 141 alone, the temperature will gradually decrease, which may cause solid impurities to precipitate in the feed pipe body 141, causing blockage of the feed pipe body 141, which is not conducive to the long-term, continuous and stable operation of the high-boiling material recovery system 100 of the distillation column. In this embodiment, a heating pipe body 142 is provided to supply heat to the feed pipe body 141 so that the feed pipe body 141 maintains a relatively high temperature. In this way, the high-boiling material has sufficient heat during transportation in the feed pipe body 141 and can be maintained at a relatively high temperature. Solid impurities will not be precipitated due to temperature drop, causing blockage of the feed pipe body 141, which is beneficial to ensuring the continuous and stable operation of the high-boiling material recovery system 100 of the distillation tower.

[0036] Optionally, the heating medium in the heating pipe body 142 can be hot water, steam or thermal oil, etc., which continuously supplies heat to the material delivery pipe body 141 so that the high boiling point material delivered to the recovery tank 110 by the material delivery pipe body 141 still has a relatively high temperature.

[0037] In some embodiments, the material inlet 112 is disposed at the top of the recovery tank 110, and the material outlet 113 is disposed at the bottom of the recovery tank 110. With this arrangement, solid impurities precipitated from the high-boiling material after processing in the recovery tank 110 are discharged under the action of gravity, thereby avoiding the formation of dead corners in the recovery tank 110, which could cause the precipitated solid impurities to settle and affect the heat exchange efficiency between the high-boiling material and the cooling assembly 130.

[0038] In some embodiments, the recovery tank 110 may include an outer shell 110b and an inner shell 110a, wherein the inner shell 110a defines a processing chamber 111, and a cooling chamber 110c is defined between the outer shell 110b and the inner shell 110a. The cooling assembly 130 may include a cooling device and a cooling pipe 131. The cooling device is connected to the cooling chamber 110c via the cooling pipe 131, and a cooling medium is supplied to the cooling chamber 110c. The cooling device supplies the cooling medium to the cooling chamber 110c via the cooling pipe 131. The cooling medium exchanges heat with the high-boiling substances in the processing chamber 111 through the shell of the inner shell 110a, and does not directly contact the high-boiling substances. This avoids the reaction between the liquid chlorosilane in the high-boiling substances and the cooling medium, which may cause raw material loss. In this way, this portion of the raw materials can be recycled, thereby saving production costs.

[0039] Optionally, the cooling device may be a water pump or a pressure tank, through which low-temperature cooling medium is continuously input into the cooling cavity 110c, so that the process of heat exchange between the cooling medium and the high-boiling material is continuously carried out.

[0040] Furthermore, the cooling medium may include cooling water. Water has a high specific heat capacity and thermal conductivity, can effectively absorb the heat of high-boiling substances, and has high cooling efficiency. At the same time, water resources are relatively abundant and inexpensive. Using cooling water as the cooling medium can reduce the operating cost of the high-boiling substance recovery system 100 for the distillation tower. Of course, the cooling medium can also be selected from air, ethylene glycol solution, or refrigerants such as Freon, ammonia, and carbon dioxide. It is transported to the cooling chamber 110c through the cooling pipe 131, and heat exchanged with the high-boiling substances in the processing chamber 111 to cool them down and precipitate solid impurities.

[0041] According to some embodiments of the present invention, the cooling assembly 130 may further include a heat exchanger. The cooling chamber 110c may have a liquid inlet and a liquid return port. The liquid inlet cooling pipe 131 is connected to the cooling device, and the liquid return port is connected to the heat exchanger via the cooling pipe 131. In this way, the cooling device, the cooling chamber 110c, and the heat exchanger form a cooling circulation loop. The cooling device supplies a low-temperature cooling medium to the cooling chamber 110c. The low-temperature cooling medium exchanges heat with the high-temperature, high-boiling substances in the processing chamber 111 in the cooling chamber 110c through the shell of the inner shell 110a. The temperature of the cooling medium rises and is then input into the heat exchanger to cool the cooling medium. The low-temperature cooling medium is then transported into the cooling chamber 110c through the cooling device. The cooling circulation loop has a simple structure. The cooling medium is recycled and input into the cooling chamber 110c to cool the high-boiling substances, avoiding waste of the cooling medium and helping to reduce production costs.

[0042] Furthermore, in the height direction of the recovery tank 110, the height of the liquid inlet is lower than the height of the liquid return port, and the cooling medium is input into the cooling chamber 110c from the liquid inlet and output from the cooling chamber 110c through the liquid outlet. Since the high-boiling material is transported from the material inlet 112 at the top of the recovery tank 110 toward the material outlet 113 at the bottom, in the height direction of the recovery tank 110, the cooling medium is transported from the lower liquid inlet to the upper liquid return port, gradually exchanging heat with the high-boiling material. In other words, the temperature of the cooling medium gradually increases from bottom to top, while the temperature of the high-boiling material gradually decreases from top to bottom. When the cooling medium is output from the liquid return port of the cooling chamber 110c, its temperature is still lower than the temperature of the high-boiling material when it is input into the recovery tank 110. That is, when the cooling medium is output from the liquid return port of the cooling chamber 110c, it can still exchange heat with the material near the material inlet in the recovery tank 110, thereby achieving high utilization of the cooling medium and high heat exchange efficiency.

[0043] In some embodiments, the stirring assembly 120 may include: a driving member 121 and an agitator 122. The driving member 121 may be a driving motor, and the driving motor is fixedly mounted on the recovery tank 110. The agitator 122 is arranged in the processing chamber 111. The agitator 122 may include a stirring shaft 122a and a stirring head 122b. The stirring shaft 122a is connected to the driving motor as the driving member 121. For example, the stirring shaft 122a and the output shaft of the driving motor can be connected and driven by a coupling, or the stirring shaft 122a and the output shaft of the driving motor can also be connected and driven by a key, or the stirring shaft 122a and the output shaft of the driving motor can also be connected and driven by a tightening sleeve. The driving motor outputs torque to the stirring shaft 122a, drives the stirring head 122b to rotate, and stirs the material in the recovery tank 110. The structure is simple, and the driving motor and the agitator 122 are easy to install. The driving member 121 drives the stirring head 122b of the stirrer 122 to stir the material in the processing chamber 111, so that the high-boiling material in the processing chamber 111 is fully in contact with the inner shell 110a. In this way, the material in the recovery tank and the cooling component are fully exchanged with heat, thereby improving the heat exchange efficiency.

[0044] Furthermore, the stirring head 122b is located at the bottom of the processing chamber 111. When the high-boiling material is cooled, the solid impurities precipitated are mainly compounds of heavy metal salts, such as aluminum trichloride or hexachlorodisilane. The solid impurities will settle at the bottom of the processing chamber 111. After a long period of treatment, an impurity layer will form on the bottom wall of the processing chamber 111, which will not only affect the heat exchange efficiency between the high-boiling material and the cooling medium, but may also block the material outlet 113, which is not conducive to the continuous operation of the high-boiling material recovery system 100 of the distillation tower. The material is stirred during the rotation of the stirring head 122b located at the bottom of the processing chamber 111 to avoid material deposition and crystallization and agglomeration at the bottom of the recovery tank, thereby reducing the cooling efficiency of the high-boiling material. In this way, the high-boiling material recovery system 100 of the distillation tower can continue to operate efficiently for a long time.

[0045] In some embodiments, the high-boiling-point recovery system 100 of the distillation tower may further include a discharge line 150 and a purge device. The discharge line 150 is connected to the material outlet 113. The purge device is in communication with the discharge line 150 to purge high-pressure gas from the discharge line 150. Purging high-pressure gas into the discharge line 150 by the purge device prevents the material discharged from the recovery tank 110 from being deposited in the discharge line 150, thereby facilitating the long-term stable operation of the high-boiling-point recovery system 100 of the distillation tower.

[0046] Furthermore, the high-pressure gas may include nitrogen. In this configuration, nitrogen, acting as an inert gas, is introduced into discharge line 150 to purge solid impurities, thereby preventing reaction between the nitrogen and the liquid chlorosilane to be recovered, thereby conserving raw materials and reducing costs. Of course, in other embodiments of the present application, helium or argon may also be used as the high-pressure gas. When introduced into discharge line 150 to purge solid impurities, this also prevents reaction between the nitrogen and the liquid chlorosilane to be recovered, thereby preventing material loss.

[0047] The principle of the high boiling point recovery system 100 of the distillation tower of the present invention is:

[0048] High-boiling materials are transported from the distillation column's discharge port through feed pipe 141 to processing chamber 111 within recovery tank 110. A cooling device delivers cooling medium to cooling chamber 110c between inner shell 110a and outer shell 110b of recovery tank 110. The cooling medium exchanges heat with the high-boiling materials through the shell of inner shell 110a, lowering the temperature of the high-boiling materials. Impurities such as aluminum trichloride and hexachlorodisilane in the high-boiling materials precipitate as solids, facilitating the recovery of liquid chlorosilane from the high-boiling materials. Simultaneously, drive member 121 of stirring assembly 120 drives stirring head 122b to rotate, stirring the materials and ensuring sufficient contact between the high-boiling materials and inner shell 110a, thereby improving heat exchange efficiency.

[0049] The treated solid-liquid mixture is output from the discharge pipeline 150 through the material outlet 113 of the recovery tank 110. The purge device blows high-pressure gas into the discharge pipeline 150, and the treated solid-liquid mixture is blown to the next process by the high-pressure gas.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0051] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0052] In the description of the present invention, “plurality” means two or more.

[0053] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0054] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0055] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0056] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A high boiling point recovery system (100) for a distillation tower, characterized in that: include: A recovery tank (110), the recovery tank (110) being provided with a processing chamber (111) and a material inlet (112) and a material outlet (113) in communication with the processing chamber (111), the material inlet (112) being in communication with a discharge port of the distillation tower, and the material outlet (113) being used to discharge the material generated in the processing chamber (111); a stirring assembly (120), wherein at least a portion of the structure of the stirring assembly (120) is disposed in the processing chamber (111), and the stirring assembly (120) is configured to stir high-boiling substances discharged from the distillation tower into the processing chamber (111); A cooling component (130) is provided in the recovery tank (110), and the cooling component (130) is configured to cool the material in the recovery tank (110); It also includes: a material delivery pipe group (140), wherein the material delivery pipe group (140) is connected to the material inlet (112) and the discharge port of the distillation tower respectively; The feed pipe assembly (140) includes: A material conveying pipe body (141) and a heating pipe body (142), wherein the material conveying pipe body (141) is respectively connected to the material inlet (112) and the material discharge port, the heating pipe body (142) and the material conveying pipe body (141) are arranged side by side, the extending direction of the heating pipe body (142) and the material conveying pipe body (141) are parallel, and a heating medium flows in the heating pipe body (142); It also includes: a discharge pipeline (150), the discharge pipeline (150) being connected to the material outlet (113); A purge device is connected to the discharge pipeline (150) to purge high-pressure gas in the discharge pipeline (150).

2. The high boiling point recovery system (100) of the distillation tower according to claim 1, characterized in that: The stirring assembly (120) includes: A driving member (121) is provided on the recovery tank (110); An agitator (122) is provided in the processing chamber (111), the agitator (122) comprising a stirring shaft (122a) and a stirring head (122b), the stirring shaft (122a) being in transmission connection with the driving member (121), and the driving member (121) drives the stirring head (122b) to rotate via the stirring shaft (122a), so as to stir the material in the recovery tank (110).

3. The high boiling point recovery system (100) of the distillation tower according to claim 2, characterized in that: The stirring head (122b) is located at the bottom of the processing chamber (111).

4. The high boiling point recovery system (100) of the distillation tower according to claim 1, characterized in that: The recovery tank (110) comprises an outer shell (110b) and an inner shell (110a), the inner shell (110a) defines the processing chamber (111), and a cooling chamber (110c) is defined between the outer shell (110b) and the inner shell (110a); The cooling assembly (130) comprises a cooling device and a cooling pipeline (131); the cooling device is in communication with the cooling cavity (110c) via the cooling pipeline (131) to supply cooling medium into the cooling cavity (110c).

5. The high boiling point recovery system (100) of the distillation tower according to claim 4, characterized in that: The cooling medium includes cooling water.

6. The high boiling point recovery system (100) of the distillation tower according to claim 1, characterized in that: The material inlet (112) is arranged at the top of the recovery tank (110), and the material outlet (113) is arranged at the bottom of the recovery tank (110).

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