Chlorobenzene recovery method and recovery equipment

Abstract

The invention discloses a chlorobenzene recovery method and recovery equipment, and relates to the technical field of chlorobenzene recovery. According to the device, fixing frames are symmetrically arranged at the top of a bottom plate, recycling assemblies are fixedly connected to the interiors of the two fixing frames, a connecting assembly is arranged at the interval of the two fixing frames, the two ends of the connecting assembly are fixedly connected with the sides, close to each other, of the two recycling assemblies correspondingly, and a condensation assembly is arranged in the two recycling assemblies; the surface of the condensation assembly is fixedly connected with the side, away from the bottom plate, of the side frame, the temperature of the tail gas is reduced to be between the boiling point of benzene and the boiling point of chlorobenzene, chlorobenzene is liquefied, then residual secondary tail gas enters the other recovery assembly through the connecting assembly, the temperature in the recovery assembly is below the boiling point of benzene, benzene steam is liquefied, and the tail gas is recycled. And then the residual inert gas is led out, and the recovery of the chlorobenzene, the benzene and the inert gas is completed at the same time, so that the waste of tail gas is effectively avoided.

Description

Technical Field

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

[0002] Chlorobenzene is a basic organic chemical raw material, the main raw materials are benzene and chlorine. 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 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 the 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 waste of resources, so we propose 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: Step 1, tail gas collection, filtering the tail gas generated by industrial chlorobenzene to filter out particulate impurities therein, at this time, the tail gas contains benzene vapor, chlorobenzene vapor, and inert gas, and then the tail gas is passed into the chlorobenzene recovery equipment; Step 2: primary condensation, the tail gas enters the first chamber, the cooling structure in the chamber reduces the temperature of the tail gas to between 80.1°C and 131.7°C, and the pressure in the chamber is standard atmospheric pressure, the temperature of the chlorobenzene vapor reaches below its boiling point, liquefaction occurs, the chlorobenzene liquid is extracted and collected; Step 3: secondary condensation, transferring the secondary tail gas to the inside of the second chamber, lowering the temperature in the second chamber to below 80.1°C under standard atmospheric pressure, so that the temperature of the benzene vapor reaches below its boiling point, liquefaction occurs, and the liquefied benzene is extracted and collected; Step 4: Recover the tail gas and discharge the remaining gas, which contains only inert gas. The inert gas is collected after being cooled.

[0004] Further, a chlorinated benzene recovery device comprises: A bottom plate, the top of which is fixedly connected to a side frame, the top of which 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; Wherein, the recycling mechanism comprises: A fixing frame, wherein the fixing frames are symmetrically arranged on the top of the bottom plate, and the insides of the two fixing frames are fixedly connected with a recovery component; A connecting component, wherein the connecting component is arranged at the interval between the two fixing frames, and the two ends of the connecting component are respectively fixedly connected to the sides of the two recycling components close to each other; A condensation assembly, wherein the condensation assembly is arranged inside the two recovery assemblies, and a surface of the condensation assembly is fixedly connected to a side of the side frame away from the bottom plate; The tail gas is passed into a recovery component, and the condensation component is started. The condensation component 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 a 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 passed out, and the recovery of chlorobenzene, benzene and inert gas is completed at the same time, effectively avoiding the waste of tail gas.

[0005] Furthermore, the recovery component includes an outer shell, the outer side surface of the outer shell is fixedly connected to the inner side surface of the fixing frame, the outer side surface of the outer 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 outer shell, exhaust gas is introduced into the air pipe, the exhaust gas is cooled in the outer 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 outer 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, thereby completing the separation of the three gases in the exhaust gas.

[0006] Furthermore, the condensation component includes a condenser, which is configured as a gyroscope-like structure, and one end of the condenser close to the bottom plate extends into the liquid pipe. When the condenser is started, the condenser regulates the temperature in the outer shell so that the temperatures in the two outer shells reach the liquefaction temperatures of benzene and chlorobenzene respectively, thereby achieving separation. The condenser 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 are larger contact surfaces, thereby condensing the steam more quickly and completing the separation quickly. The tip of the condenser extends into the liquid pipe, which enables the condensed liquid to gather at its tip and fall into the liquid pipe for discharge, thereby avoiding residual liquid on the surface of the condenser.

[0007] Furthermore, a rotating shaft is provided inside the two shells, and a side of the condenser away from the liquid pipe is fixedly connected to the rotating shaft, an 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, and the transmission box is started, and 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.

[0008] Furthermore, a fan blade is fixedly connected to the outer side surface of the condenser, and the fan blade is arranged in an arc shape on a 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 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 a side close to the air pipe, which can avoid the fan blades blocking the air pipe and ensure the smooth flow of exhaust gas.

[0009] 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 outer shell. The fan blade rotates, driving the scraper to rotate, thereby scraping off the liquid attached to the inner wall of the outer shell to avoid waste caused by residual liquid, and the trapezoidal scraper has a slope, which can better scrape off the liquid.

[0010] Furthermore, a sealing ring is rotatably connected to the outer side surface of the rotating shaft. The sealing ring is arranged on a side of the condenser away from the base plate, and the outer side surface of the sealing ring is fixedly connected to the inner side surface of the outer shell. The sealing ring has a concave surface on the side away from the condenser. 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.

[0011] 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 far away from each other are respectively fixedly connected to the outer side surfaces of the two outer shells, and a lower U-shaped tube is arranged 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 a cylinder, and the outer side surface of the cylinder is fixedly connected to the side of the two fixing frames that are close to each other, and the secondary exhaust gas enters the tube body on one side, and then enters the lower U-shaped tube, and then the liquid flowing with the steam is gathered in the smaller tube diameter of the lower U-shaped tube, and finally enters the inside of the cylinder, and the remaining gas enters the other outer shell from the tube body on the other side to continue cooling.

[0012] Furthermore, an upper U-shaped tube is arranged at the interval of the lower U-shaped tube, both ends of the upper U-shaped tube extend to the inside 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 arranged on the side of the cylinder body 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 body, and the cone is made of rubber material, and 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 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.

[0013] The present invention has the beneficial effects: The present invention provides a recovery mechanism, and the tail gas temperature is reduced to between the boiling points of benzene and chlorobenzene, so that the chlorobenzene is liquefied. Then the remaining secondary tail gas passes through a connecting component, and the connecting component collects the residual chlorobenzene liquid. Then the secondary tail gas enters another recovery component, and the temperature in the recovery component is below the boiling point of benzene, so that the benzene vapor is liquefied. Then the remaining inert gas is passed out, and the recovery of chlorobenzene, benzene and inert gas is completed at the same time, thereby effectively avoiding the waste of tail gas.

[0014] The present invention provides a condenser, which is arranged in a gyroscope shape with evenly inclined arcs at both ends. When the upper and lower sides come into contact with the exhaust gas, both have larger contact surfaces, thereby condensing the steam more quickly and completing the separation quickly. The tip of the condenser extends to the inside of the liquid pipe, so that the condensed liquid can be gathered at the tip and fall into the liquid pipe for discharge, thereby avoiding residual liquid on the surface of the condenser.

[0015] The present invention provides a condensation component, and the condenser rotates, so that the liquid is thrown off under the action of centrifugal force to prevent the liquid 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 one side close to the air pipe, which can prevent the fan blades from blocking the air pipe 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 to avoid waste caused by liquid residue. The trapezoidal scraper has a slope, which can better scrape off the liquid.

[0016] The present invention provides a sealing ring which 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 and prevent external gas from entering the housing.

[0017] The present invention arranges a connecting component. When there is more liquid, the bending part of the lower U-shaped tube is completely blocked by the liquid. In order to prevent the liquid from being pushed into another shell, an upper U-shaped tube is arranged 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 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. In addition, due to the arrangement of the cone, the liquid is collected and blocked in the depression thereof. By controlling the gas 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

[0018] Figure 1 This is a schematic diagram of the chlorinated benzene recovery method of the present invention; Figure 2 This is a schematic diagram of the structure of the chlorinated benzene recovery equipment of the present invention; Figure 3 This is a schematic diagram of the recovery mechanism structure of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the housing of the present invention; Figure 5 It is a schematic diagram of the structure of the condenser of the present invention; Figure 6 This is a schematic diagram of the sealing ring structure of the present invention; Figure 7 This is a schematic diagram of the structure of the connection assembly of the present invention; Figure 8 This is a schematic diagram of the upper V-shaped tube structure of the present invention; Fig. 9 For the present invention Figure 8 A magnified view of part A.

[0019] In the figure: 1. bottom plate; 2. side frame; 3. recovery mechanism; 31. fixed 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 body; 334. upper U-shaped tube; 335. small hole; 336. cone cylinder; 34. condensation assembly; 341. condenser; 342. fan blade; 343. scraper; 344. rotating shaft; 345. transmission box; 346. sealing ring. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0021] Example 1, please refer to Figure 1 , a method for recovering chlorinated benzene, comprising the following steps: Step 1, tail gas collection, filtering the tail gas generated by industrial chlorobenzene to filter out particulate impurities therein, at this time, the tail gas contains benzene vapor, chlorobenzene vapor, and inert gas, and then the tail gas is passed into the chlorobenzene recovery equipment; Step 2: primary condensation, the tail gas enters the first chamber, the cooling structure in the chamber reduces the temperature of the tail gas to between 80.1°C and 131.7°C, and the pressure in the chamber is standard atmospheric pressure, the temperature of the chlorobenzene vapor reaches below its boiling point, liquefaction occurs, the chlorobenzene liquid is extracted and collected; Step 3: secondary condensation, transferring the secondary tail gas to the inside of the second chamber, lowering the temperature in the second chamber to below 80.1°C under standard atmospheric pressure, so that the temperature of the benzene vapor reaches below its boiling point, liquefaction occurs, and the liquefied benzene is extracted and collected; Step 4: Recover the tail gas and discharge the remaining gas, which contains only inert gas. The inert gas is collected after being cooled.

[0022] Example 2, please refer to Figure 1-Figure 9 , a chlorinated benzene recovery device, comprising: 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; Among them, the recycling mechanism 3 includes: 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 with the recovery components 32; A connecting component 33, 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 recycling components 32 close to each other; A condensation assembly 34, which is disposed inside the two recovery assemblies 32, and a surface of the condensation assembly 34 is fixedly connected to a side of the side frame 2 away from the bottom plate 1; 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 passed out, and the recovery of chlorobenzene, benzene and inert gas is completed at the same time, effectively avoiding the waste of tail gas.

[0023] 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 fixing frame 31, the outer side of the outer shell 321 is fixedly connected to an air pipe 322, a liquid pipe 323 is provided on the side of the air pipe 322 close to the bottom plate 1, and the surface of the liquid pipe 323 is fixedly connected to the outer side of the outer shell 321, exhaust gas is introduced into the air pipe 322, the exhaust gas is cooled in the outer shell 321, and 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, and then the liquefied benzene is discharged through the other side of the liquid pipe 323, and the inert gas is discharged through the other air pipe 322, thereby completing the separation of the three gases in the exhaust gas.

[0024] 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 outer shell 321 so that the temperatures inside the two outer 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 are larger contact surfaces, 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.

[0025] 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, and 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. 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 the liquid is thrown off under the action of centrifugal force to prevent the liquid from remaining on the surface of the condenser 341.

[0026] The outer side 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 number of fan blades 342 are evenly distributed along the circumference of the condenser 341. The rotation of the condenser 341 drives the fan blade 342 to rotate. The fan blade 342 drives the steam in the outer shell 321 to mix, so as to obtain a more uniform temperature and ensure the complete condensation of the steam. The rotating steam can delay the time for it to leave the outer shell 321, so as to obtain a more thorough separation. The fan blade 342 is arranged in an arc shape on one side close to the air pipe 322, which can prevent the fan blade 342 from blocking the air pipe 322 and ensure the smooth flow of the exhaust gas.

[0027] A 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 slidably 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 residual liquid. The trapezoidal scraper 343 has a slope, which can better scrape off the liquid.

[0028] The outer side surface of the rotating shaft 344 is rotatably connected with 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 inner side of the outer shell 321.

[0029] 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 that are 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 arranged at the interval between the two tube bodies 331, and 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 side of the two fixing frames 31 that are 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, and the remaining gas enters the other outer shell 321 from the tube body 331 on the other side to continue cooling.

[0030] An upper U-shaped tube 334 is provided at the interval of the lower U-shaped tube 332, and both ends of the upper U-shaped tube 334 extend into 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. 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 conical cylinder 336 is provided so that the liquid is collected and blocked in the depression thereof. The gas pressure in the cylinder body 333 is controlled to control the inflow of the liquid, so that a water seal can be formed, which effectively prevents the gas from entering the cylinder body 333.

[0031] When in 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, and drives the condenser 341 to rotate, so that under the action of centrifugal force, the liquid is thrown off, and the condenser 341 rotates, driving the fan blade 342 to rotate, and the fan blade 342 drives the steam in the shell 321 to mix, and 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, 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, and then the liquid flowing with the steam is collected in the smaller tube diameter of the lower U-shaped tube 332, and finally enters the cylinder body 333, and 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, and then the liquefied benzene is discharged through the other side liquid pipe 323, and the inert gas is discharged through the other gas pipe 322, completing the separation of the three gases in the tail gas.

[0032] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A method for recovering chlorinated benzene, characterized in that: The following steps are involved: Step 1, tail gas collection, filtering the tail gas generated by industrial chlorobenzene to filter out particulate impurities therein, at this time, the tail gas contains benzene vapor, chlorobenzene vapor, and inert gas, and then the tail gas is passed into the chlorobenzene recovery equipment; Step 2: primary condensation, the tail gas enters the first chamber, the cooling structure in the chamber reduces the temperature of the tail gas to between 80.1°C and 131.7°C, and the pressure in the chamber is standard atmospheric pressure, the temperature of the chlorobenzene vapor reaches below its boiling point, liquefaction occurs, the chlorobenzene liquid is extracted and collected; Step 3: secondary condensation, transferring the secondary tail gas to the inside of the second chamber, lowering the temperature in the second chamber to below 80.1°C under standard atmospheric pressure, so that the temperature of the benzene vapor reaches below its boiling point, liquefaction occurs, and the liquefied benzene is extracted and collected; Step 4: Recover the tail gas and discharge the remaining gas, which contains only inert gas. The inert gas is collected after being cooled.

2. A chlorinated benzene recovery device, characterized in that, include: 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 recovery mechanism (3) comprises: A fixing frame (31), the fixing frames (31) being symmetrically arranged on the top of the bottom plate (1), and the insides of the two fixing frames (31) are both fixedly connected with a recovery assembly (32); A connecting component (33), the connecting component (33) being arranged at a distance between the two fixing frames (31), and the two ends of the connecting component (33) being respectively fixedly connected to the sides of the two recycling components (32) close to each other; A condensation component (34), wherein the condensation component (34) is arranged inside the two recovery components (32), and a surface of the condensation component (34) is fixedly connected to a side of the side frame (2) away from the bottom plate (1).

3. A chlorobenzene recovery device according to claim 2, characterized in that: The recovery component (32) comprises an outer shell (321), the outer side surface of the outer shell (321) being fixedly connected to the inner side surface of the fixing frame (31), the outer side surface of the outer shell (321) being fixedly connected to an air pipe (322), a liquid pipe (323) being provided on a side of the air pipe (322) close to the bottom plate (1), and the surface of the liquid pipe (323) being fixedly connected to the outer side surface of the outer shell (321).

4. A chlorinated benzene recovery device according to claim 3, characterized in that: The condensation assembly (34) comprises a condenser (341), the condenser (341) being arranged in a gyro-like structure, and one end of the condenser (341) close to the bottom plate (1) extending into the interior of the liquid pipe (323).

5. A chlorobenzene recovery device according to claim 4, characterized in that: A rotating shaft (344) is disposed inside the two shells (321), and a 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 disposed on a side of the rotating shaft (344) away from the bottom plate (1), the two rotating shafts (344) are respectively fixedly connected to output ends of the transmission box (345), and an outer side surface of the transmission box (345) is fixedly connected to a side of the side frame (2) away from the bottom plate (1).

6. A chlorinated benzene recovery device according to claim 5, 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).

7. A chlorinated benzene recovery device according to claim 6, characterized in that: A scraper (343) is fixedly connected to a side of the fan blade (342) away from the condenser (341); the scraper (343) is arranged in an isosceles trapezoid, and a side of the scraper (343) away from the condenser (341) is slidably connected to an inner side surface of the housing (321).

8. A chlorinated benzene recovery device according to claim 7, 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); 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.

9. A chlorinated benzene recovery device according to claim 8, 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 respectively 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 body (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 body (333) is fixedly connected to the sides of the two fixing frames (31) that are close to each other.

10. A chlorinated benzene recovery device according to claim 9, characterized in that: An upper U-shaped tube (334) is arranged 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 opened on the surface of the upper U-shaped tube (334) located inside the lower U-shaped tube (332), and a cone (336) is arranged 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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