Method and apparatus for recovering high-temperature dust-laden organic vapors

Abstract

This invention relates to the field of organic vapor recovery technology, and more particularly to a device for recovering high-temperature dust-laden organic vapor, comprising a primary filtration device, a secondary filtration device, a horizontal storage chamber, a spiral wound heat exchanger, a vacuum pump system, and a tail gas treatment device connected in sequence. The primary filtration device is a conical tank with a first heating pipe jacket, containing a pulse jet bag filter inside, and a pulse gas heating device connected to the pulse jet bag filter outside. The secondary filtration device is a cylindrical tank with a second heating pipe jacket, containing an industrial dust filter inside. The horizontal storage chamber includes a steam precooling section and a liquid recovery section separated by a sealed partition. The spiral wound heat exchanger contains a spiral steam guide pipe. This invention improves the recovery efficiency of high-temperature dust-laden organic vapor.

Description

Technical Field

[0001] This invention relates to the field of organic vapor recovery technology, and in particular to a method and apparatus for recovering high-temperature dust-containing organic vapor. Background Technology

[0002] In many industrial production processes such as chemical engineering, pharmaceuticals, petroleum refining, coating, and lithium battery material sintering, large amounts of high-temperature waste gas are frequently generated. This waste gas is not only high in temperature but also complex in composition, often containing a large amount of valuable organic vapor components as well as potentially entrained fine dust particles, forming a typical high-temperature, dust-laden organic vapor mixture. Currently, the primary goal of treating this type of waste gas is to achieve the resource recovery of organic matter and to ensure that the waste gas meets emission standards.

[0003] Chinese Patent Publication No. CN104225951B discloses a benzene-based organic vapor recovery device, comprising a low-temperature condensation device, a temperature-switching adsorption device, and a pressure-switching adsorption device. The low-temperature condensation device includes a cold box heat exchanger, a refrigeration compressor, and a condensing heat exchanger connected in sequence. The steam inlet of the cold box heat exchanger is connected to the outlet of the benzene-based organic vapor. The condensing heat exchanger is connected to the cold box heat exchanger via a valve to form a cooling circulation system. The condensing heat exchanger is also provided with a cooling water inlet and a cooling water outlet to form a water circulation system. The cold box heat exchanger is also provided with a liquid outlet, which is connected to a stratification tank for recovering benzene liquid.

[0004] However, the existing technology has the following problems: it cannot effectively filter dust, organic vapor cannot be quickly condensed and recovered through simple contact, and the recovered organic liquid is easily contaminated by the condensate and may still contain a lot of dust. Summary of the Invention

[0005] Therefore, the present invention provides a method and apparatus for recovering high-temperature dust-containing organic vapor, in order to overcome the problem in the prior art that the dust does not take into account the fact that it will block the heat exchanger channel, thereby reducing the heat exchange efficiency and thus reducing the recovery efficiency.

[0006] To achieve the above objectives, the present invention provides a high-temperature dust-containing organic vapor recovery device, comprising a primary filtration device, a secondary filtration device, a horizontal storage chamber, a spiral wound heat exchanger, a vacuum pump system, and a tail gas treatment device connected in sequence.

[0007] The primary filtration device is a conical tank with a first heating pipe jacket, inside which is a pulse bag filter, a steam inlet is provided on its side wall, and a pulse gas heating device connected to the pulse bag filter is provided on its exterior.

[0008] The secondary filtration device is a cylindrical tank with a second heating pipe interlayer, and its interior is an industrial dust filter.

[0009] The horizontal storage chamber includes a steam precooling section and a liquid recovery section separated by a sealed partition;

[0010] The spiral-wound heat exchanger is equipped with a spiral steam guide pipe inside.

[0011] The vacuum pump system includes a vacuum pump and a first pressure sensor at the inlet and a second pressure sensor at the outlet of the connecting pipe, respectively located in the horizontal storage chamber.

[0012] The exhaust gas treatment device is a cylindrical tank, the interior of which is filled with activated carbon adsorbent.

[0013] It also includes a control module, which is used to determine the qualification of the recovery based on the turbidity of the condensate. Under the condition that the recovery is qualified, the qualification of the recovery is determined a second time based on whether there is a stratification phenomenon after standing for a first preset time.

[0014] If the recovery fails, the control module determines the reason for the failure based on the phenomenon of the condensate after standing for a second preset time.

[0015] Furthermore, the pulse bag filter includes a pulse device and a filter bag connected to the pulse device.

[0016] Furthermore, the horizontal storage chamber has a circulating chilled water pipe in the tank interlayer, and the inner wall of the tank has multiple layers of vertical partition ribs, which are connected to the tank interlayer to form a chilled water flow guiding structure.

[0017] Furthermore, both the steam precooling section and the liquid recovery section are equipped with drain valves at their bottom sides, and the drain valves are connected to the storage tank via pipes.

[0018] Furthermore, the control module determines the qualification of the recovery based on the turbidity of the condensate. If the turbidity is less than the preset turbidity, the recovery is deemed qualified. The module also makes a second determination of the qualification of the recovery based on whether there is stratification after standing for a first preset time.

[0019] If the turbidity is greater than or equal to the preset turbidity, the recovery is deemed unqualified, and the reason for the unqualified recovery is determined based on the phenomenon of the condensate after standing for a second preset time.

[0020] Furthermore, the control module makes a second determination of the recycling qualification based on whether the condensate has stratification after standing for a first preset time. If stratification exists, the recycling is deemed qualified in the second determination.

[0021] If no stratification occurs, the second determination of recycling is deemed unqualified, and a demulsifier is added for demulsification treatment.

[0022] Furthermore, the control module determines the reason for unqualified recovery based on the phenomenon of the condensate after standing for a second preset time. If the condensate separates into layers, the reason for unqualified recovery is determined to be emulsification of oily organic matter.

[0023] If precipitation occurs in the condensate, the reason for the unqualified recovery is determined to be that the dust removal is not up to standard, and the frequency of the pulse bag filter is increased according to the difference between the turbidity and the preset turbidity.

[0024] Furthermore, the frequency of the bag filter is positively correlated with the turbidity difference, wherein the turbidity difference is the difference between the turbidity and the preset turbidity.

[0025] Furthermore, the hot fluid introduced into the pulse gas heating device is one of the following: heat transfer oil with a temperature of 60 to 200°C, industrial hot water, or industrial hot gas.

[0026] The temperature of the circulating chilled water is 5℃~15℃, and the flow rate is 5~20m³ / h.

[0027] This invention also provides a method for recovering high-temperature dust-laden organic vapor, comprising:

[0028] Step S1: Introduce hot fluid into the heating pipe interlayer of the primary and secondary filters and start the pulse gas heating device to heat the compressed air used to backflush the cleaning bag to a preset temperature.

[0029] Step S2: Start the vacuum pump to pump the high-temperature dust-laden organic vapor to the primary filtration device for filtration and dust removal.

[0030] Step S3: The filtered organic vapor is introduced into the pre-cooling section of the horizontal storage chamber for initial cooling.

[0031] Step S4: The pre-cooled steam is introduced into a spiral wound heat exchanger for heat exchange, so that the temperature of the organic steam drops below the dew point and condenses into droplets, which are collected in the liquid storage tank at the bottom of the heat exchanger.

[0032] Step S5: Determine the qualification of the recovery based on the turbidity of the condensate in the storage tank. If the recovery is unqualified, determine the reason for the unqualified recovery based on the phenomenon of the condensate after standing for a second preset time.

[0033] Step S6: Under the condition that the recycling is qualified, the recycling qualification is determined a second time based on whether there is a stratification phenomenon after standing for a first preset time.

[0034] Step S7: Pass the exhaust gas into the exhaust gas treatment device for physical adsorption to remove residual organic vapors.

[0035] Compared with the prior art, the beneficial effects of the present invention are that the present invention is equipped with heating pipe jackets in both the primary and secondary filtration devices, and the pulse gas is heated separately, so that the entire filtration stage is maintained above the sublimation temperature of organic vapor, effectively preventing the vapor from condensing on the filter bag and tank wall, thereby avoiding dust from clumping and hardening due to moisture, ensuring the long-term unobstructed flow of the filtration channel and the continuous and stable operation of the system.

[0036] Furthermore, the present invention first uses a horizontal storage chamber with built-in multi-layer corrugated partition ribs to pre-cool the clean steam, thereby increasing the heat exchange area and achieving gentle pre-cooling; then, it uses a spiral wound heat exchanger for deep condensation. Its unique double spiral reverse winding structure enables the chilled water and steam to carry out full and efficient convective heat exchange, greatly reducing the risk of blockage and improving the recovery rate of organic steam.

[0037] Furthermore, this invention determines the success of the recovery based on the turbidity of the condensate in the storage tank, establishing a clear preset turbidity standard. This quantitative judgment method enables rapid and accurate assessment of recovery quality, providing a reliable basis for subsequent processing. Under conditions of unsuccessful recovery, the cause of the failure is determined based on the phenomena observed in the condensate after settling. Targeted troubleshooting methods can quickly identify the root cause of the problem, allowing for timely and effective adjustments and improvements. This enhances the stability and reliability of the recovery system and reduces production interruptions and losses caused by unsuccessful recovery.

[0038] Furthermore, this invention constructs a three-stage recovery and purification system of "filtration-condensation-adsorption," achieving the dual goals of resource recovery and environmental compliance. This invention protects the downstream condensation device and vacuum pump through fine filtration at the front end; the efficient condensation stage completes the recovery of the main resources; and the final exhaust gas treatment device, equipped with activated carbon adsorbent, deeply purifies the residual exhaust gas, ensuring that the final emissions meet the stringent VOA environmental control requirements. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the high-temperature dust-containing organic vapor recovery device according to an embodiment of the present invention;

[0040] Figure 2 This is a flowchart of a method for recovering high-temperature dust-containing organic vapor according to an embodiment of the present invention;

[0041] Figure 3 This is a flowchart illustrating how the turbidity of the condensate determines the suitability of the recovery process according to an embodiment of the present invention.

[0042] Figure 4This is a flowchart illustrating how the recovery process fails to meet standards based on the observed phenomena of the condensate, as described in an embodiment of the present invention.

[0043] In the diagram: 1. Primary filtration device; 2. Secondary filtration device; 3. Horizontal storage chamber; 4. Spiral wound heat exchanger; 5. Vacuum pump system; 6. Exhaust gas treatment device; 11. Pulse gas heating device; 111. Hot fluid inlet; 112. Hot fluid outlet; 113. Air inlet; 12. Pulse device; 13. Bag filter; 14. Steam inlet; 15. First heating pipeline; 21. Second heating pipeline; 31. Sealing partition; 32. Steam precooling section; 33. Liquid recovery section; 34. Circulating chilled water pipeline; 35. Separating rib; 36. Drain valve; 37. Liquid storage tank; 41. Spiral steam guide pipe; 43. Cooling water inlet; 44. Cooling water outlet; 51. Vacuum pump; 52. First pressure sensor; 53. Second pressure sensor. Detailed Implementation

[0044] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0045] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0046] It should be noted that the data in this embodiment are all derived from a comprehensive analysis and evaluation of historical test data and corresponding historical test results from the three months prior to this test. Those skilled in the art will understand that the determination of the above-mentioned parameters for any single item in this invention can be achieved by selecting the value with the highest percentage based on the data distribution as the preset standard parameter, using weighted summation to obtain the value as the preset standard parameter, substituting each historical data point into a specific formula and using the value obtained from that formula as the preset standard parameter, or other selection methods, as long as the invention can clearly define different specific situations in the single-item judgment process through the obtained values.

[0047] Please see Figures 1 to 4 The figures shown are: a schematic diagram of the high-temperature dust-laden organic vapor recovery device according to an embodiment of the present invention; a flowchart of the high-temperature dust-laden organic vapor recovery method according to an embodiment of the present invention; a flowchart of determining the qualification of recovery based on the turbidity of the condensate according to an embodiment of the present invention; and a flowchart of determining the reasons for unqualified recovery based on the phenomenon of the condensate according to an embodiment of the present invention.

[0048] The high-temperature dust-laden organic vapor recovery device of the present invention includes a primary filtration device 1, a secondary filtration device 2, a horizontal storage chamber 3, a spiral wound heat exchanger 4, a vacuum pump system 5, and a tail gas treatment device 6 connected in sequence.

[0049] The primary filtration device 1 is a conical tank with a first heating pipe 15 interlayer, inside which is a pulse bag dust collector 13, and a steam inlet 14 is provided on its side wall. Outside of it is a pulse gas heating device 11 connected to the pulse bag dust collector 13.

[0050] The secondary filtration device 2 is a cylindrical tank with a second heating pipe 21 sandwiched in, and its interior is an industrial dust filter.

[0051] The horizontal storage chamber 3 includes a steam precooling section 32 and a liquid recovery section 33 separated by a sealing partition 31;

[0052] The spiral wound heat exchanger 4 is provided with a spiral steam guide pipe 41 inside;

[0053] The vacuum pump system 5 includes a vacuum pump 51 and a first pressure sensor 52 at the inlet of the connecting pipe and a second pressure sensor 53 at the outlet of the horizontal storage chamber 3.

[0054] The exhaust gas treatment device 6 is a cylindrical tank, the interior of which is filled with activated carbon adsorbent.

[0055] It also includes a control module, which is used to determine the qualification of the recovery based on the turbidity of the condensate. Under the condition that the recovery is qualified, the qualification of the recovery is determined a second time based on whether there is a stratification phenomenon after standing for a first preset time.

[0056] If the recovery fails, the control module determines the reason for the failure based on the phenomenon of the condensate after standing for a second preset time.

[0057] Specifically, the pulse gas heating device 11 is further provided with a hot fluid inlet 111, a hot fluid outlet 112, and an air inlet 113.

[0058] Specifically, the spiral wound heat exchanger 4 is also provided with a cooling water inlet 43 and a cooling water outlet 44.

[0059] Specifically, the pulse bag filter 13 includes a pulse device 12 and a filter bag 13 connected to the pulse device 12.

[0060] Specifically, the horizontal storage chamber 3 has a tank interlayer with a circulating chilled water pipe 34, and the inner wall of the tank has multiple layers of vertical partition ribs 35. The partition ribs 35 are connected to the tank interlayer to form a chilled water flow guiding structure.

[0061] Specifically, both the steam precooling section 32 and the liquid recovery section 33 are provided with drain valves 36 on their sides and bottoms, and the drain valves 36 are connected to the liquid storage tank 37 through pipes.

[0062] Specifically, the partition rib 35 has a wavy structure, with a height of 1 / 2 to 3 / 4 of the inner diameter of the tank, and the spacing between adjacent ribs is 2 to 10 cm.

[0063] Specifically, the hot fluid introduced into the pulse gas heating device 11 is one of the following: heat transfer oil with a temperature of 60 to 200°C, industrial hot water, or industrial hot gas.

[0064] The temperature of the circulating chilled water is 5℃~15℃, and the flow rate is 5~20m³ / h.

[0065] Specifically, heat transfer oil or industrial hot water is circulated in the heating pipeline to heat the tank and prevent the high-temperature organic vapor from condensing (condensing into droplets on the tank wall and filter bag 13). This would cause dust to adhere, block the filter bag 13 and the tank wall, resulting in the organic vapor not being effectively filtered, which in turn contaminates the subsequent condensed organic liquid and damages the vacuum pump system 5.

[0066] The method for recovering high-temperature dust-containing organic vapor according to embodiments of the present invention includes:

[0067] Step S1: Hot fluid is introduced into the heating pipe interlayer of the primary filter device 1 and the secondary filter device 2, and the pulse gas heating device 11 is started to heat the compressed air used for backflushing and cleaning the filter bag 13 to a preset temperature.

[0068] Step S2: Start vacuum pump 51 to pump high-temperature dust-laden organic vapor to primary filter device 1 for filtration and dust removal.

[0069] Step S3: The filtered organic vapor is introduced into the pre-cooling section of the horizontal storage chamber 3 for initial cooling.

[0070] Step S4: The pre-cooled steam is introduced into the spiral wound heat exchanger 4 for heat exchange, so that the temperature of the organic steam drops below the dew point and condenses into droplets, which are collected in the liquid storage tank 37 at the bottom of the heat exchanger.

[0071] Step S5: Determine the qualification of the recovery based on the turbidity of the condensate in the storage tank 37. If the recovery is not qualified, determine the reason for the failure of the recovery based on the phenomenon of the condensate after standing for a second preset time.

[0072] Step S6: Under the condition that the recycling is qualified, the recycling qualification is determined a second time based on whether there is a stratification phenomenon after standing for a first preset time.

[0073] Step S7: The exhaust gas is passed into the exhaust gas treatment device 6 for physical adsorption to remove residual organic vapors.

[0074] Specifically, the high-temperature dust-laden organic vapor recovery method of this invention is divided into three stages: the first stage is the organic vapor filtration stage, the second stage is the organic vapor condensation stage, and the third stage is the final tail gas recovery and treatment stage. The entire steam transport is carried out by a vacuum pump 51. The first stage is equipped with a two-stage filtration device to fully filter the high-temperature organic vapor containing dust, preventing clogging of the subsequent vacuum pump 51. The primary filtration device 1 serves as the main dust removal device, and the secondary filtration device 2 serves as a backup dust removal device. In the second stage, chilled water is used to fully exchange heat with the high-temperature organic vapor, lowering the temperature of the organic vapor below its dew point, thereby condensing it into a liquid state and achieving efficient recovery of the organic vapor. This stage is equipped with two condensation devices. The filtered organic vapor first enters a horizontal storage tank. This horizontal storage tank is divided into two sections: one for pre-cooling and storing the organic vapor, and the other for recovering the condensed organic liquid. The storage tank has a jacketed layer filled with circulating chilled water and multiple layers of partition ribs 35 inside. After the circulating chilled water is introduced, a low-temperature environment is created inside. The introduced organic vapor comes into contact with the inner wall of the tank and the partition ribs 35, receiving a certain degree of cooling and a decrease in temperature. The organic vapor is then further introduced into a spiral-wound heat exchanger 4, where it undergoes thorough heat exchange with the chilled water, ultimately condensing into droplets and being recovered into the storage tank below. The condensed and recovered gas is then transported to the third stage via a vacuum pump 51. The third stage consists of a quick-release adsorption tank filled with activated carbon adsorbent for final adsorption treatment of the organic vapor tail gas, ensuring that the vast majority of the organic vapor tail gas is adsorbed. The remaining tail gas is then discharged into the atmosphere via pipelines.

[0075] Specifically, the rotational speed of the vacuum pump system 5 is automatically adjusted based on the pressure difference (the absolute value of the difference between the readings of the first pressure sensor 52 and the second pressure sensor 53), with an adjustment range of 500 to 3000 rpm.

[0076] Specifically, the qualification of the recovery is determined based on the turbidity of the condensate. If the turbidity is less than the preset turbidity, the recovery is deemed qualified. The qualification of the recovery is further determined based on whether there is stratification after standing for a first preset time.

[0077] If the turbidity is greater than or equal to the preset turbidity, the recovery is deemed unqualified, and the reason for the unqualified recovery is determined based on the phenomenon of the condensate after standing for a second preset time.

[0078] Specifically, the recycling qualification is determined a second time based on whether the condensate has stratified after standing for a first preset time. If stratification is present, the recycling is deemed qualified.

[0079] If no stratification occurs, the second determination of recycling is deemed unqualified, and a demulsifier is added for demulsification treatment.

[0080] In this embodiment of the invention, the preset turbidity is 5 NTU, the first preset duration is 10 min, and the second preset duration is 1 h. However, the above values ​​are not limited to these, and those skilled in the art can adjust the above values ​​according to actual needs.

[0081] Specifically, the reason for the failure to recycle is determined based on the phenomenon of the condensate after standing for a second preset time. If the condensate separates into layers, the reason for the failure to recycle is determined to be the emulsification of oily organic matter.

[0082] If precipitation occurs in the condensate, the reason for the unqualified recovery is determined to be that the dust removal is not up to standard, and the frequency of the pulse bag filter is increased according to the difference between the turbidity and the preset turbidity.

[0083] Specifically, the frequency of the pulse jet bag filter is increased based on the turbidity difference.

[0084] If the turbidity difference is less than the preset turbidity difference, the frequency of the bag filter will be increased to the corresponding value using the first frequency adjustment coefficient of 1.2.

[0085] If the turbidity difference is greater than or equal to the preset turbidity difference, the frequency of the bag filter is increased to the corresponding value using the second frequency adjustment coefficient of 1.5.

[0086] The turbidity difference is the difference between the turbidity and the preset turbidity.

[0087] In this embodiment of the invention, the preset turbidity difference value is 2 NTU, but the value is not limited to this. Those skilled in the art can adjust the value according to actual needs.

[0088] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0089] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for recovering high-temperature dust-laden organic vapor, characterized in that, It includes a primary filtration unit, a secondary filtration unit, a horizontal storage chamber, a spiral wound heat exchanger, a vacuum pump system, and an exhaust gas treatment unit connected in sequence. The primary filtration device is a conical tank with a first heating pipe jacket, inside which is a pulse bag filter, a steam inlet is provided on its side wall, and a pulse gas heating device connected to the pulse bag filter is provided on its exterior. The secondary filtration device is a cylindrical tank with a second heating pipe interlayer, and its interior is an industrial dust filter. The horizontal storage chamber includes a steam precooling section and a liquid recovery section separated by a sealed partition; The spiral-wound heat exchanger is equipped with a spiral steam guide pipe inside. The vacuum pump system includes a vacuum pump and a first pressure sensor at the inlet and a second pressure sensor at the outlet of the connecting pipe, respectively located in the horizontal storage chamber. The exhaust gas treatment device is a cylindrical tank, the interior of which is filled with activated carbon adsorbent. It also includes a control module, which is used to determine the qualification of the recovery based on the turbidity of the condensate. Under the condition that the recovery is qualified, the qualification of the recovery is determined a second time based on whether there is a stratification phenomenon after standing for a first preset time. If the recovery fails, the control module determines the reason for the failure based on the phenomenon of the condensate after standing for a second preset time.

2. The high-temperature dust-laden organic vapor recovery device according to claim 1, characterized in that, The pulse bag filter includes a pulse device and a filter bag connected to the pulse device.

3. The high-temperature dust-laden organic vapor recovery device according to claim 2, characterized in that, The horizontal storage chamber has a tank interlayer with circulating chilled water pipes, and the inner wall of the tank has multiple layers of vertical partition ribs. The partition ribs are connected to the tank interlayer to form a chilled water flow guiding structure.

4. The high-temperature dust-laden organic vapor recovery device according to claim 3, characterized in that, Both the steam precooling section and the liquid recovery section are equipped with drain valves on their sides and bottoms, and the drain valves are connected to the liquid storage tanks through pipes.

5. The high-temperature dust-laden organic vapor recovery device according to claim 4, characterized in that, The control module determines the qualification of the recovery based on the turbidity of the condensate. If the turbidity is less than the preset turbidity, the recovery is deemed qualified. The module also makes a second determination of the qualification of the recovery based on whether there is stratification after standing for a first preset time. If the turbidity is greater than or equal to the preset turbidity, the recovery is deemed unqualified, and the reason for the unqualified recovery is determined based on the phenomenon of the condensate after standing for a second preset time.

6. The high-temperature dust-laden organic vapor recovery device according to claim 5, characterized in that, The control module makes a second determination of the recycling qualification based on whether the condensate has stratification after standing for a first preset time. If stratification exists, the recycling is deemed qualified. If no stratification occurs, the second determination of recycling is deemed unqualified, and a demulsifier is added for demulsification treatment.

7. The high-temperature dust-laden organic vapor recovery device according to claim 6, characterized in that, The control module determines the reason for unqualified recovery based on the phenomenon of the condensate after standing for a second preset time. If the condensate separates into layers, the reason for unqualified recovery is determined to be emulsification of oily organic matter. If precipitation occurs in the condensate, the reason for the unqualified recovery is determined to be that the dust removal is not up to standard, and the frequency of the pulse bag filter is increased according to the difference between the turbidity and the preset turbidity.

8. The high-temperature dust-laden organic vapor recovery device according to claim 7, characterized in that, The frequency of the bag filter is positively correlated with the turbidity difference, wherein the turbidity difference is the difference between the turbidity and the preset turbidity.

9. The high-temperature dust-laden organic vapor recovery device according to claim 8, characterized in that, The hot fluid introduced into the pulse gas heating device is one of the following: heat transfer oil with a temperature of 60 to 200°C, industrial hot water, or industrial hot gas. The temperature of the circulating chilled water is 5℃~15℃, and the flow rate is 5~20m³ / h.

10. A method for recovering high-temperature dust-laden organic vapor, applied to the high-temperature dust-laden organic vapor recovery device according to any one of claims 1-9, characterized in that, include: Step S1: Introduce hot fluid into the heating pipe interlayer of the primary and secondary filters and start the pulse gas heating device to heat the compressed air used to backflush the cleaning bag to a preset temperature. Step S2: Start the vacuum pump to pump the high-temperature dust-laden organic vapor to the primary filtration device for filtration and dust removal. Step S3: The filtered organic vapor is introduced into the pre-cooling section of the horizontal storage chamber for initial cooling. Step S4: The pre-cooled steam is introduced into a spiral wound heat exchanger for heat exchange, so that the temperature of the organic steam drops below the dew point and condenses into droplets, which are collected in the liquid storage tank at the bottom of the heat exchanger. Step S5: Determine the qualification of the recovery based on the turbidity of the condensate in the storage tank. If the recovery is unqualified, determine the reason for the unqualified recovery based on the phenomenon of the condensate after standing for a second preset time. Step S6: Under the condition that the recycling is qualified, the recycling qualification is determined a second time based on whether there is a stratification phenomenon after standing for a first preset time. Step S7: Pass the exhaust gas into the exhaust gas treatment device for physical adsorption to remove residual organic vapors.

Images