A method and equipment for recovering chlorobenzene

Abstract

The present invention discloses a chlorobenzene recovery method and recovery equipment, and relates to the technical field of chlorobenzene recovery. The present invention includes: fixed frames are symmetrically arranged on the top of a base plate, and recovery components are fixedly connected to the inside of the two fixed frames. A connecting component is arranged at the interval between the two fixed frames, and the two ends of the connecting component are respectively fixedly connected to the sides of the two recovery components that are close to each other. A condensing component is arranged inside the two recovery components, and the surface of the condensing component is fixedly connected to the side of the side frame away from the base plate. The tail gas temperature is reduced to between the boiling points of benzene and chlorobenzene, so that the chlorobenzene is liquefied. Subsequently, the remaining secondary tail gas enters another recovery component through the connecting component. The temperature inside the recovery component is below the boiling point of benzene, and the benzene vapor is liquefied. Subsequently, the remaining inert gas is discharged, and the recovery of chlorobenzene, benzene, and inert gas is completed simultaneously, effectively avoiding the waste of tail gas.

Description

Technical Field

[0001] The present invention relates to the technical field of chlorobenzene recovery, and in particular to a chlorobenzene recovery method and recovery equipment. Background Art

[0002] Chlorobenzene is a basic organic chemical raw material, with benzene and chlorine as the main raw materials. After drying, pure benzene reacts with chlorine in a chlorinator through the action of a catalyst. The acidic chlorinated liquid obtained after the reaction is dehydrated and alkali-washed, and then dried and distilled into a crude and rectifying tower to obtain the finished chlorobenzene. Chlorobenzene production is the chlorination of benzene under boiling conditions, and the products include chlorobenzene and hydrogen chloride gas. Due to the high-temperature continuous chlorination process, the removal of reaction heat is achieved by evaporation and gasification of benzene. Therefore, the generated tail gas mainly contains benzene vapor, a small amount of chlorobenzene vapor and inert gas. Direct discharge not only causes a waste of resources, but also leads to the development of a chlorobenzene recovery method and recovery equipment. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a chlorobenzene recovery method and recovery equipment, comprising the following steps:

[0004] Step 1: collecting tail gas, filtering the tail gas produced by industrial chlorobenzene to remove particulate impurities. The tail gas contains benzene vapor, chlorobenzene vapor, and inert gas, and then passing the tail gas into the chlorobenzene recovery equipment;

[0005] In step 2, primary condensation, the exhaust gas enters the first chamber, where a cooling structure lowers the temperature of the exhaust gas to between 80.1°C and 131.7°C. The pressure in the chamber is standard atmospheric pressure, causing the temperature of the chlorobenzene vapor to fall below its boiling point, resulting in liquefaction. The chlorobenzene liquid is then extracted and collected.

[0006] Step 3: Secondary condensation: The secondary tail gas is transferred to the interior of a second chamber. Under standard atmospheric pressure, the temperature in the second chamber is reduced to below 80.1°C. The temperature of the benzene vapor drops below its boiling point, causing liquefaction. The liquefied benzene is then extracted and collected.

[0007] Step 4: Recover the tail gas and discharge the remaining gas, which only contains inert gas. The inert gas is collected after cooling.

[0008] Furthermore, a chlorinated benzene recovery device comprises:

[0009] A bottom plate, wherein the top of the bottom plate is fixedly connected to a side frame, the top of the bottom plate is fixedly connected to a recovery mechanism, and the recovery mechanism is fixedly connected to a side of the side frame away from the bottom plate;

[0010] Wherein, the recycling mechanism includes:

[0011] Fixed frames, the fixed frames are symmetrically arranged on the top of the bottom plate, and the interiors of the two fixed frames are fixedly connected with recovery components;

[0012] A connecting component is provided at the interval between the two fixing frames, and both ends of the connecting component are fixedly connected to the sides of the two recycling components close to each other;

[0013] A condensing assembly, the condensing assembly being disposed inside the two recovery assemblies, and a surface of the condensing assembly being fixedly connected to a side of the side frame away from the bottom plate;

[0014] The tail gas is passed into a recovery component, and the condensation component is started. The condensation component cools the tail gas and reduces the tail gas temperature to between the boiling points of benzene and chlorobenzene, so that the chlorobenzene is liquefied. Then the remaining secondary tail gas passes through the connecting component, and the connecting component collects the residual chlorobenzene liquid. Then the secondary tail gas enters another recovery component. The temperature in this recovery component is below the boiling point of benzene, so that the benzene vapor is liquefied. Then the remaining inert gas is discharged, and the recovery of chlorobenzene, benzene and inert gas is completed at the same time, effectively avoiding the waste of tail gas.

[0015] Furthermore, the recovery component includes a shell, the outer side surface of the shell is fixedly connected to the inner side surface of the fixed frame, the outer side surface of the shell is fixedly connected to an air pipe, a liquid pipe is provided on the side of the air pipe close to the bottom plate, and the surface of the liquid pipe is fixedly connected to the outer side surface of the shell, exhaust gas is introduced into the air pipe, the exhaust gas is cooled in the shell, liquefied chlorobenzene vapor flows out through the liquid pipe, and then the secondary exhaust gas is discharged from the connecting component, and then enters the shell of another recovery component, and then the liquefied benzene is discharged through the liquid pipe on the other side, and the inert gas is discharged through another air pipe, completing the separation of the three gases in the exhaust gas.

[0016] Furthermore, the condensation component includes a condenser, which is configured as a gyroscope-shaped structure, and one end of the condenser close to the bottom plate extends to the inside of the liquid pipe. When the condenser is started, the condenser regulates the temperature inside the outer shell so that the temperatures inside the two outer shells reach the liquefaction temperatures of benzene and chlorobenzene respectively, thereby achieving separation. The condenser is configured as a gyroscope-shaped structure with evenly inclined arcs at both ends. When the upper and lower sides come into contact with the exhaust gas, there is a larger contact surface, thereby condensing the steam more quickly and completing the separation quickly. The tip of the condenser extends to the inside of the liquid pipe, which can make the condensed liquid gather at its tip and fall into the liquid pipe for discharge, thereby avoiding residual liquid on the surface of the condenser.

[0017] Furthermore, a rotating shaft is provided inside the two shells, and the side of the condenser away from the liquid pipe is fixedly connected to the rotating shaft, and one end of the rotating shaft away from the condenser extends to the outside of the shell, and a transmission box is provided on the side of the rotating shaft away from the bottom plate. The two rotating shafts are respectively fixedly connected to the output ends of the transmission box, and the outer side surface of the transmission box is fixedly connected to the side of the side frame away from the bottom plate. When the transmission box is started, the output end of the transmission box drives the rotating shaft to rotate, and drives the condenser to rotate, so that the liquid is thrown off under the action of centrifugal force to prevent liquid from remaining on the surface of the condenser.

[0018] Furthermore, the outer side surface of the condenser is fixedly connected to a fan blade, and the fan blade is arranged in an arc shape on the side close to the air pipe, and a number of the fan blades are evenly distributed along the circumference of the condenser. The rotation of the condenser drives the fan blades to rotate, and the fan blades drive the steam in the outer shell to mix, thereby obtaining a more uniform temperature and ensuring the complete condensation of the steam. The rotating steam can delay the time it leaves the outer shell, thereby obtaining a more thorough separation. The fan blade is arranged in an arc shape on the side close to the air pipe, which can avoid the fan blades blocking the air pipe and ensure the smooth flow of exhaust gas.

[0019] Furthermore, a scraper is fixedly connected to the side of the fan blade away from the condenser, and the scraper is arranged in an isosceles trapezoid, and the side of the scraper away from the condenser is slidably connected to the inner side surface of the shell. The fan blade rotates, driving the scraper to rotate, thereby scraping off the liquid attached to the inner wall of the shell to avoid waste caused by liquid residue, and the trapezoidal scraper has a slope, which can better scrape off the liquid.

[0020] Furthermore, a sealing ring is rotatably connected to the outer side of the rotating shaft. The sealing ring is arranged on the side of the condenser away from the bottom plate, and the outer side of the sealing ring is fixedly connected to the inner side of the outer shell. The side of the sealing ring away from the condenser has a concave surface. The sealing ring can seal the rotating shaft and the outer shell to prevent gas leakage, and the concave surface of the sealing ring can store liquid to form a water seal, which can cool the rotating shaft while preventing external gas from entering the interior of the outer shell.

[0021] Furthermore, the connecting assembly includes a tube body, which is symmetrically arranged at the interval between the two outer shells, and the ends of the two tube bodies that are away from each other are fixedly connected to the outer side surfaces of the two outer shells respectively. A lower U-shaped tube is provided at the interval between the two tube bodies, and the side of the lower U-shaped tube close to the bottom plate is fixedly connected to the cylinder body, and the outer side surface of the cylinder body is fixedly connected to the side of the two fixing frames that are close to each other. The secondary exhaust gas enters the tube body on one side and then enters the lower U-shaped tube. Then, the liquid flowing with the steam gathers in the smaller diameter of the lower U-shaped tube and finally enters the inside of the cylinder body. The remaining gas enters the other outer shell from the tube body on the other side to continue cooling.

[0022] Furthermore, an upper U-shaped tube is provided at the interval of the lower U-shaped tube, both ends of the upper U-shaped tube extend into the interior of the lower U-shaped tube, and the outer side surface of the upper U-shaped tube is fixedly connected to the inner side surface of the lower U-shaped tube, and a small hole is opened on the surface of the upper U-shaped tube located inside the lower U-shaped tube, and a cone is provided on the side of the cylinder close to the lower U-shaped tube, and the outer side surface of the cone is fixedly connected to the inner side surface of the cylinder, and the cone is made of rubber material. When there is more liquid, the bend of the lower U-shaped tube is completely blocked by the liquid In order to prevent the liquid from being pushed into the other shell, an upper U-shaped tube is set to connect the two sides of the lower U-shaped tube to form a communicating vessel. The liquid levels on both sides are always the same. The upper U-shaped tube allows the gas to pass smoothly and prevents the liquid from being pressed into the other side of the shell. Small holes are opened on the surface of the upper U-shaped tube, which can effectively prevent the liquid from passing through the upper U-shaped tube with the gas. The setting of the cone cylinder allows the liquid to gather and block in its depression. By controlling the air pressure in the cylinder, the inflow of liquid can be controlled, which can form a water seal and effectively prevent gas from entering the cylinder.

[0023] The present invention has the beneficial effects:

[0024] The present invention provides a recovery mechanism to reduce the tail gas temperature to between the boiling points of benzene and chlorobenzene, thereby liquefying the chlorobenzene. The remaining secondary tail gas then passes through a connecting component, which collects the residual chlorobenzene liquid. The secondary tail gas then enters another recovery component, in which the temperature inside the recovery component is below the boiling point of benzene, thereby liquefying the benzene vapor. The remaining inert gas is then discharged, and the recovery of chlorobenzene, benzene, and the inert gas is completed simultaneously, thereby effectively avoiding waste of tail gas.

[0025] The present invention provides a condenser, which is arranged in a gyro-like shape with evenly inclined arcs at both ends. When the upper and lower sides come into contact with the exhaust gas, there are larger contact surfaces, so that the steam can be condensed more quickly and the separation can be completed quickly. The tip of the condenser extends to the inside of the liquid pipe, which can enable the condensed liquid to gather at its tip and fall into the liquid pipe for discharge, thereby avoiding liquid residue on the surface of the condenser.

[0026] The present invention sets a condensation component, and the condenser rotates, so that the liquid is thrown off under the action of centrifugal force, and the liquid is prevented from remaining on the surface of the condenser. The fan blades drive the steam in the outer shell to mix, so as to obtain a more uniform temperature, ensure the complete condensation of the steam, and the rotating steam can delay the time for it to leave the outer shell, so as to obtain a more thorough separation. The fan blades are arranged in an arc shape on the side close to the trachea, which can prevent the fan blades from blocking the trachea and ensure the smooth circulation of the exhaust gas. The fan blades rotate, driving the scraper to rotate, so as to scrape off the liquid attached to the inner wall of the outer shell, and avoid waste caused by liquid residue. The trapezoidal scraper has a slope, which can better scrape off the liquid.

[0027] The present invention provides a sealing ring that can seal the rotating shaft and the housing to prevent gas leakage, and the concave surface of the sealing ring can store liquid to form a water seal, which can cool the rotating shaft while preventing external gas from entering the interior of the housing.

[0028] The present invention is provided with a connecting component. When there is a lot of liquid, the bend of the lower U-shaped tube is completely blocked by the liquid. In order to prevent the liquid from being pushed into the other shell, an upper U-shaped tube is provided to connect the two sides of the lower U-shaped tube to form a communicating vessel. The liquid levels on both sides are always the same. The upper U-shaped tube allows the gas to pass smoothly and prevents the liquid from being pressed into the other side shell. Small holes are opened on the surface of the upper U-shaped tube, which can effectively prevent the liquid from passing through the upper U-shaped tube along with the gas. The conical cylinder is provided so that the liquid is collected and blocked in its depression. By controlling the air pressure in the cylinder, the inflow of the liquid is controlled, and a water seal can be formed to effectively prevent the gas from entering the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the chlorinated benzene recovery method of the present invention;

[0030] Figure 2 This is a schematic structural diagram of the chlorinated benzene recovery equipment of the present invention;

[0031] Figure 3 This is a schematic diagram showing the structure of the recycling mechanism of the present invention;

[0032] Figure 4 This is a schematic diagram of the cross-sectional structure of the housing of the present invention;

[0033] Figure 5 Schematic diagram of the condenser structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the sealing ring structure of the present invention;

[0035] Figure 7 This is a schematic diagram of the connection assembly structure of the present invention;

[0036] Figure 8 This is a schematic diagram of the upper V-shaped tube structure of the present invention;

[0037] Figure 9 For the present invention Figure 8 Magnified view of part A.

[0038] In the figure: 1. bottom plate; 2. side frame; 3. recovery mechanism; 31. fixing frame; 32. recovery assembly; 321. outer shell; 322. air pipe; 323. liquid pipe; 33. connecting assembly; 331. tube body; 332. lower U-shaped tube; 333. cylinder; 334. upper U-shaped tube; 335. small hole; 336. cone; 34. condensation assembly; 341. condenser; 342. fan blade; 343. scraper; 344. rotating shaft; 345. transmission box; 346. sealing ring. DETAILED DESCRIPTION

[0039] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0040] Example 1, please refer to Figure 1 A method for recovering chlorobenzene comprises the following steps:

[0041] Step 1: collecting tail gas, filtering the tail gas produced by industrial chlorobenzene to remove particulate impurities. The tail gas contains benzene vapor, chlorobenzene vapor, and inert gas, and then passing the tail gas into the chlorobenzene recovery equipment;

[0042] In step 2, primary condensation, the exhaust gas enters the first chamber, where a cooling structure lowers the temperature of the exhaust gas to between 80.1°C and 131.7°C. The pressure in the chamber is standard atmospheric pressure, causing the temperature of the chlorobenzene vapor to fall below its boiling point, resulting in liquefaction. The chlorobenzene liquid is then extracted and collected.

[0043] Step 3: Secondary condensation: The secondary tail gas is transferred to the interior of a second chamber. Under standard atmospheric pressure, the temperature in the second chamber is reduced to below 80.1°C. The temperature of the benzene vapor drops below its boiling point, causing liquefaction. The liquefied benzene is then extracted and collected.

[0044] Step 4: Recover the tail gas and discharge the remaining gas, which only contains inert gas. The inert gas is collected after cooling.

[0045] Example 2, please refer to Figures 1-9 , a chlorinated benzene recovery device, comprising:

[0046] A bottom plate 1, a side frame 2 is fixedly connected to the top of the bottom plate 1, a recovery mechanism 3 is fixedly connected to the top of the bottom plate 1, and the recovery mechanism 3 is fixedly connected to a side of the side frame 2 away from the bottom plate 1;

[0047] Among them, the recycling mechanism 3 includes:

[0048] The fixing frames 31 are symmetrically arranged on the top of the base plate 1, and the insides of the two fixing frames 31 are fixedly connected with the recovery components 32;

[0049] The connecting component 33 is arranged at the interval between the two fixing frames 31, and the two ends of the connecting component 33 are respectively fixedly connected to the sides of the two recovery components 32 that are close to each other;

[0050] The condensation assembly 34 is disposed inside the two recovery assemblies 32 , and the surface of the condensation assembly 34 is fixedly connected to a side of the side frame 2 away from the bottom plate 1 ;

[0051] The tail gas is passed into a recovery component 32, and the condensation component 34 is started. The condensation component 34 cools the tail gas to a temperature between the boiling points of benzene and chlorobenzene, so that the chlorobenzene is liquefied. Then the remaining secondary tail gas passes through the connecting component 33, and the connecting component 33 collects the residual chlorobenzene liquid. Then the secondary tail gas enters another recovery component 32. The temperature in this recovery component 32 is below the boiling point of benzene, so that the benzene vapor is liquefied. Then the remaining inert gas is discharged, and the recovery of chlorobenzene, benzene, and inert gas is completed at the same time, effectively avoiding the waste of tail gas.

[0052] The recovery component 32 includes an outer shell 321, the outer side of the outer shell 321 is fixedly connected to the inner side of the fixed frame 31, the outer side of the outer shell 321 is fixedly connected to an air pipe 322, and a liquid pipe 323 is provided on the side of the air pipe 322 close to the base plate 1, and the surface of the liquid pipe 323 is fixedly connected to the outer side of the outer shell 321. The exhaust gas is introduced into the air pipe 322, and the exhaust gas is cooled in the outer shell 321. The liquefied chlorobenzene vapor flows out through the liquid pipe 323, and then the secondary exhaust gas is discharged from the connecting component 33, and then enters the outer shell 321 of another recovery component 32. Then the liquefied benzene is discharged through the liquid pipe 323 on the other side, and the inert gas is discharged through the other air pipe 322, completing the separation of the three gases in the exhaust gas.

[0053] The condensation assembly 34 includes a condenser 341, which is configured as a gyroscope-like structure, and one end of the condenser 341 close to the bottom plate 1 extends to the inside of the liquid pipe 323. When the condenser 341 is started, the condenser 341 regulates the temperature inside the shell 321 so that the temperatures inside the two shells 321 reach the liquefaction temperatures of benzene and chlorobenzene respectively, thereby achieving separation. The condenser 341 is configured as a gyroscope-like structure with evenly inclined arcs at both ends. When the upper and lower sides come into contact with the exhaust gas, there is a larger contact surface, thereby condensing the steam more quickly and completing the separation quickly. The tip of the condenser 341 extends to the inside of the liquid pipe 323, which can make the condensed liquid gather at its tip and fall into the liquid pipe 323 for discharge, thereby avoiding residual liquid on the surface of the condenser 341.

[0054] A rotating shaft 344 is provided inside the two shells 321, and the side of the condenser 341 away from the liquid pipe 323 is fixedly connected to the rotating shaft 344. The end of the rotating shaft 344 away from the condenser 341 extends to the outside of the shell 321, and a transmission box 345 is provided on the side of the rotating shaft 344 away from the base plate 1. The two rotating shafts 344 are respectively fixedly connected to the output ends of the transmission box 345, and the outer side surface of the transmission box 345 is fixedly connected to the side of the side frame 2 away from the base plate 1. When the transmission box 345 is started, the output end of the transmission box 345 drives the rotating shaft 344 to rotate, and drives the condenser 341 to rotate, so that under the action of centrifugal force, the liquid is thrown off to prevent the liquid from remaining on the surface of the condenser 341.

[0055] The outer side of the condenser 341 is fixedly connected to the fan blade 342, and the fan blade 342 is arranged in an arc shape near the side of the air pipe 322, and there are several fan blades 342 evenly distributed along the circumference of the condenser 341. The condenser 341 rotates, driving the fan blade 342 to rotate. The fan blade 342 drives the steam in the outer shell 321 to mix, thereby obtaining a more uniform temperature and ensuring complete condensation of the steam. The rotating steam can delay the time it leaves the outer shell 321, thereby obtaining a more thorough separation. The fan blade 342 is arranged in an arc shape near the side of the air pipe 322, which can prevent the fan blade 342 from blocking the air pipe 322 and ensure the smooth flow of exhaust gas.

[0056] The scraper 343 is fixedly connected to the side of the fan blade 342 away from the condenser 341. The scraper 343 is set to an isosceles trapezoid, and the side of the scraper 343 away from the condenser 341 is slidingly connected to the inner side surface of the shell 321. The fan blade 342 rotates, driving the scraper 343 to rotate, thereby scraping off the liquid attached to the inner wall of the shell 321 to avoid waste caused by liquid residue. The trapezoidal scraper 343 has a slope, which can better scrape off the liquid.

[0057] The outer side surface of the rotating shaft 344 is rotatably connected to a sealing ring 346. The sealing ring 346 is arranged on the side of the condenser 341 away from the base plate 1, and the outer side surface of the sealing ring 346 is fixedly connected to the inner side surface of the outer shell 321. The side of the sealing ring 346 away from the condenser 341 has a concave surface. The sealing ring 346 can seal the rotating shaft 344 and the outer shell 321 to prevent gas leakage, and the concave surface of the sealing ring 346 can store liquid to form a water seal, which can cool the rotating shaft 344 while preventing external gas from entering the interior of the outer shell 321.

[0058] The connecting assembly 33 includes a tube body 331, which is symmetrically arranged at the interval between the two outer shells 321, and the ends of the two tube bodies 331 away from each other are fixedly connected to the outer side surfaces of the two outer shells 321 respectively. A lower U-shaped tube 332 is provided at the interval between the two tube bodies 331, and the side of the lower U-shaped tube 332 close to the bottom plate 1 is fixedly connected to the cylinder 333, and the outer side surface of the cylinder 333 is fixedly connected to the side of the two fixing frames 31 close to each other. The secondary exhaust gas enters the tube body 331 on one side and then enters the lower U-shaped tube 332. Then, the liquid flowing with the steam gathers in the smaller tube diameter of the lower U-shaped tube 332 and finally enters the inside of the cylinder 333. The remaining gas enters the other outer shell 321 from the tube body 331 on the other side to continue cooling.

[0059] An upper U-shaped tube 334 is provided at the interval of the lower U-shaped tube 332. Both ends of the upper U-shaped tube 334 extend into the interior of the lower U-shaped tube 332, and the outer side surface of the upper U-shaped tube 334 is fixedly connected to the inner side surface of the lower U-shaped tube 332. A small hole 335 is provided on the surface of the upper U-shaped tube 334 located inside the lower U-shaped tube 332. A cone 336 is provided on the side of the cylinder 333 close to the lower U-shaped tube 332, and the outer side surface of the cone 336 is fixedly connected to the inner side surface of the cylinder 333. The cone 336 is made of rubber material. When there is a lot of liquid, the bend of the lower U-shaped tube 332 is completely blocked by the liquid. In order to prevent the liquid from being pushed into the other shell 321, an upper U-shaped tube 334 is provided to connect the two sides of the lower U-shaped tube 332 to form a communicating vessel. The liquid levels on both sides are always the same. The upper U-shaped tube 334 allows the gas to pass smoothly and prevents the liquid from being pressed into the other side shell 321. Small holes 335 are provided on the surface of the upper U-shaped tube 334, which can effectively prevent the liquid from passing through the upper U-shaped tube 334 along with the gas. The setting of the cone 336 allows the liquid to gather and block in its depression. By controlling the air pressure in the cylinder 333, the inflow of liquid is controlled, which can form a water seal and effectively prevent the gas from entering the cylinder 333.

[0060] During use, exhaust gas is introduced into the air pipe 322, and the exhaust gas is cooled in the shell 321. The condenser 341 is started, and the condenser 341 regulates the temperature in the shell 321 so that the temperatures in the two shells 321 reach the liquefaction temperature of benzene and chlorobenzene respectively, thereby achieving separation. The transmission box 345 is started, and the output end of the transmission box 345 drives the shaft 344 to rotate, driving the condenser 341 to rotate, so that under the action of centrifugal force, the liquid is thrown off. The condenser 341 rotates, driving the fan blades 342 to rotate, and the fan blades 342 drive the steam in the shell 321 to mix. The fan blades 342 rotate, driving the scraper 343 to rotate. , thereby scraping off the liquid attached to the inner wall of the shell 321, and the liquefied chlorobenzene vapor flows out through the liquid pipe 323, and the secondary tail gas enters the tube body 331 on one side, and then enters the lower U-shaped tube 332. Then, the liquid flowing with the steam gathers in the smaller tube diameter of the lower U-shaped tube 332, and finally enters the inside of the cylinder 333. The remaining gas enters another shell 321 from the tube body 331 on the other side to continue cooling, and then enters the shell 321 of another recovery component 32. Then, the liquefied benzene is discharged through the liquid pipe 323 on the other side, and the inert gas is discharged through the other gas pipe 322, completing the separation of the three gases in the tail gas.

[0061] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A method for recovering chlorobenzene, characterized in that, The following steps are involved: Step 1: collecting tail gas, filtering the tail gas produced by industrial chlorobenzene to remove particulate impurities. The tail gas contains benzene vapor, chlorobenzene vapor, and inert gas, and then passing the tail gas into the chlorobenzene recovery equipment; In step 2, primary condensation, the exhaust gas enters the first chamber, where a cooling structure lowers the temperature of the exhaust gas to between 80.1°C and 131.7°C. The pressure in the chamber is standard atmospheric pressure, causing the temperature of the chlorobenzene vapor to fall below its boiling point, resulting in liquefaction. The chlorobenzene liquid is then extracted and collected. Step 3: Secondary condensation: The secondary tail gas is transferred to the interior of a second chamber. Under standard atmospheric pressure, the temperature in the second chamber is reduced to below 80.1°C. The temperature of the benzene vapor drops below its boiling point, causing liquefaction. The liquefied benzene is then extracted and collected. Step 4: Recover the tail gas and drain the remaining gas, which contains only inert gas. The inert gas is cooled and then collected; The chlorinated benzene recovery equipment comprises: A bottom plate (1), the top of the bottom plate (1) being fixedly connected to a side frame (2), the top of the bottom plate (1) being fixedly connected to a recovery mechanism (3), and the recovery mechanism (3) being fixedly connected to a side of the side frame (2) away from the bottom plate (1); Wherein, the recycling mechanism (3) comprises: A fixing frame (31), the fixing frames (31) are symmetrically arranged on the top of the bottom plate (1), and the insides of the two fixing frames (31) are fixedly connected to the recovery components (32); A connecting component (33), the connecting component (33) is arranged at the interval between the two fixing frames (31), and both ends of the connecting component (33) are fixedly connected to the sides of the two recycling components (32) that are close to each other; A condensation assembly (34), the condensation assembly (34) being arranged inside the two recovery assemblies (32), and a surface of the condensation assembly (34) being fixedly connected to a side of the side frame (2) away from the bottom plate (1); The recovery component (32) comprises a shell (321), an air pipe (322) is fixedly connected to the outer side of the shell (321), a liquid pipe (323) is provided on a side of the air pipe (322) close to the bottom plate (1), and a surface of the liquid pipe (323) is fixedly connected to the outer side of the shell (321); The condensation assembly (34) includes a condenser (341), the condenser (341) is configured as a gyro-like structure, and one end of the condenser (341) close to the bottom plate (1) extends to the inside of the liquid pipe (323).

2. A method for recovering chlorobenzene according to claim 1, characterized in that: The outer side surface of the housing (321) is fixedly connected to the inner side surface of the fixing frame (31).

3. A chlorobenzene recovery method according to claim 1, characterized in that: A rotating shaft (344) is provided inside the two shells (321), and the side of the condenser (341) away from the liquid pipe (323) is fixedly connected to the rotating shaft (344), one end of the rotating shaft (344) away from the condenser (341) extends to the outside of the shell (321), and a transmission box (345) is provided on the side of the rotating shaft (344) away from the bottom plate (1). The two rotating shafts (344) are respectively fixedly connected to the output ends of the transmission box (345), and the outer side surface of the transmission box (345) is fixedly connected to the side of the side frame (2) away from the bottom plate (1).

4. A method for recovering chlorobenzene according to claim 3, characterized in that: The outer side surface of the condenser (341) is fixedly connected with a fan blade (342), the fan blade (342) is arranged in an arc shape on one side close to the air pipe (322), and a plurality of the fan blades (342) are evenly distributed along the circumference of the condenser (341).

5. A method for recovering chlorobenzene according to claim 4, characterized in that: A scraper (343) is fixedly connected to the side of the fan blade (342) away from the condenser (341); the scraper (343) is arranged in an isosceles trapezoid, and the side of the scraper (343) away from the condenser (341) is slidably connected to the inner side surface of the housing (321).

6. A method for recovering chlorobenzene according to claim 5, characterized in that: The outer side surface of the rotating shaft (344) is rotatably connected to a sealing ring (346), the sealing ring (346) is arranged on a side of the condenser (341) away from the bottom plate (1), and the outer side surface of the sealing ring (346) is fixedly connected to the inner side surface of the outer shell (321), and the side of the sealing ring (346) away from the condenser (341) has a concave surface.

7. A method for recovering chlorobenzene according to claim 6, characterized in that: The connecting assembly (33) comprises a tube body (331), the tube body (331) being symmetrically arranged at the interval between the two outer shells (321), and the ends of the two tube bodies (331) that are away from each other are fixedly connected to the outer side surfaces of the two outer shells (321), a lower U-shaped tube (332) is arranged at the interval between the two tube bodies (331), a cylinder (333) is fixedly connected to the side of the lower U-shaped tube (332) close to the bottom plate (1), and the outer side surface of the cylinder (333) is fixedly connected to the sides of the two fixing frames (31) that are close to each other.

8. A method for recovering chlorobenzene according to claim 7, characterized in that: An upper U-shaped tube (334) is provided at the interval of the lower U-shaped tube (332), both ends of the upper U-shaped tube (334) extend into the interior of the lower U-shaped tube (332), and the outer side surface of the upper U-shaped tube (334) is fixedly connected to the inner side surface of the lower U-shaped tube (332), and a small hole (335) is provided on the surface of the upper U-shaped tube (334) located inside the lower U-shaped tube (332), and a cone (336) is provided on the side of the cylinder (333) close to the lower U-shaped tube (332), and the outer side surface of the cone (336) is fixedly connected to the inner side surface of the cylinder (333), and the cone (336) is made of rubber material.

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