Normal hexane waste gas treatment equipment

Abstract

The utility model relates to n-hexane waste gas treatment equipment, which comprises a precooling device provided with a precooling condenser which is connected with a gas inlet pipe; the adsorption device comprises a first adsorption tower, a second adsorption tower and a discharge pipeline communicated with the first adsorption tower and the second adsorption tower, and the first adsorption tower and the second adsorption tower are communicated with the precooling condenser; the desorption device comprises a hot steam pipeline and a desorption pipeline which are communicated with the first adsorption tower and the second adsorption tower, a desorption condenser is arranged at the tail end of the desorption pipeline, the normal hexane waste gas is condensed through a precooling condenser, the concentration of the normal hexane waste gas is reduced, and more effective adsorption is realized by matching with filtration of the first adsorption tower and the second adsorption tower; the adsorption capacity is improved.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and more particularly to a hexane waste gas treatment device. Background Technology

[0002] Volatile organic compounds (VOCs) are a major contributor to ozone pollution, primarily originating from industries such as paint production, chemical fiber manufacturing, and metal coating. Harmful VOCs mainly include acetone, toluene, and n-hexane. There are various methods for treating harmful VOCs, among which the condensation method involves directly introducing industrial waste gas into a condenser. Through adsorption, absorption, desorption, and separation, valuable organic matter is recovered, waste heat is recovered, and the waste gas is purified to meet emission standards.

[0003] According to Chinese patent CN212440630U, a hexane tail gas adsorption and recovery device for a rubber apparatus is disclosed. In this device, the hexane waste gas is introduced into the first and second adsorbers by the main fan and then discharged. After a period of operation, the gas flow meter of the first adsorber detects that the amount of gas entering its interior reaches the set amount, that is, the first adsorber is saturated, and then the adsorption is switched to the second and third adsorbers. In this device, the hexane waste gas directly enters the interior of the adsorbers and is adsorbed by the adsorbers without pretreatment, resulting in poor adsorption efficiency.

[0004] Therefore, it is necessary to develop a hexane waste gas treatment device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a hexane waste gas treatment device with strong adsorption capacity.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hexane waste gas treatment device, comprising:

[0007] A precooling device is provided with a precooling condenser, which is connected to an air inlet pipe;

[0008] An adsorption device includes a first adsorption tower, a second adsorption tower, and an outlet pipe connecting the first adsorption tower and the second adsorption tower. The first adsorption tower and the second adsorption tower are connected to the precooling condenser.

[0009] The desorption device includes a hot steam pipe connecting the first adsorption tower and the second adsorption tower and a desorption pipe, wherein a desorption condenser is provided at the end of the desorption pipe.

[0010] Furthermore, the precooling device includes a refrigeration unit, and the precooling condenser is cooled by the refrigeration unit.

[0011] Furthermore, the precooling device includes a liquid outlet pipe, which is connected to the first adsorption tower and the second adsorption tower respectively, and a valve is provided at the connection point.

[0012] Furthermore, a main fan is installed on the discharge pipe, and the discharge pipe draws the purified material filtered in the first adsorption tower and the second adsorption tower through the main fan.

[0013] Furthermore, the desorption condenser is connected to a liquid storage tank, and the liquid storage tank is connected to a drain pipe.

[0014] Furthermore, a vacuum filter is installed on the desorption pipe, and the vacuum filter filters the steam passing through the desorption pipe.

[0015] Furthermore, the first adsorption tower and the second adsorption tower are connected by a steam condensate drain pipe.

[0016] Furthermore, the first adsorption tower and the second adsorption tower are connected to a safety control device, which includes a nitrogen generator and a conveying pipeline connected to the nitrogen generator. The other end of the conveying pipeline is connected to the first adsorption tower and the second adsorption tower, respectively.

[0017] Furthermore, the first adsorption tower and the second adsorption tower are connected to a cooling device, which includes a cooling pipe, a surface cooler installed on the cooling pipe, and a cooling fan. The cooling pipe is connected to the first adsorption tower and the second adsorption tower.

[0018] Furthermore, the number of desorption condensers is one pair, and the desorption pipes are connected in series with the pair of desorption condensers.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is a n-hexane waste gas treatment device with strong adsorption capacity. It condenses the n-hexane waste gas through a pre-cooling condenser, reducing the concentration of the n-hexane waste gas. Combined with the filtration of the first adsorption tower and the second adsorption tower, it achieves more effective adsorption and improves the adsorption capacity. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 This is a schematic diagram of the precooling device structure of a hexane waste gas treatment equipment according to the present invention;

[0022] Figure 2 for Figure 1 A partial structural diagram of the adsorption and desorption devices of the hexane waste gas treatment equipment shown;

[0023] Figure 3 for Figure 1 This is a schematic diagram of another partial structure of the desorption device in the hexane waste gas treatment equipment shown.

[0024] In the diagram: 1. Precooling device; 2. Adsorption device; 3. Desorption device; 11. Precooling condenser; 12. Refrigeration unit; 13. Inlet pipe; 14. Outlet pipe; 21. First adsorption tower; 22. Second adsorption tower; 23. Valve; 24. Discharge pipe; 25. Main fan; 31. Hot steam pipe; 32. Desorption pipe; 33. Vacuum pump; 34. Desorption condenser; 35. Storage tank; 36. Drain pipe; 37. Vacuum filter; 38. Steam condensate drain pipe; 4. Safety control device; 41. Nitrogen generator; 42. Conveying pipe; 5. Cooling device; 51. Cooling pipe; 52. Surface cooler; 53. Cooling fan. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model is a n-hexane waste gas treatment device, which includes a precooling device 1, an adsorption device 2 connected to the precooling device 1, and a desorption device 3 connected to the adsorption device 2.

[0027] The precooling device 1 includes a precooling condenser 11 and a refrigeration unit 12. The precooling condenser 11 is cooled by the refrigeration unit 12. The precooling condenser 11 and the refrigeration unit 12 are existing technologies and will not be explained in detail. The two ends of the precooling condenser 11 are respectively connected to an inlet pipe 13 and a liquid outlet pipe 14. The n-hexane waste gas enters from the inlet pipe 13 and is discharged from the precooling condenser 11 through the liquid outlet pipe 14 after condensation.

[0028] The adsorption device 2 includes a first adsorption tower 21 and a second adsorption tower 22. The first adsorption tower 21 and the second adsorption tower 22 have the same structure and are filled with resin. The liquid outlet pipe 14 is connected to the first adsorption tower 21 and the second adsorption tower 22 respectively. Specifically, a valve 23 is provided at the connection point between the liquid outlet pipe 14 and the first adsorption tower 21 and the second adsorption tower 22 respectively.

[0029] The adsorption device 2 also includes an exhaust pipe 24 and a main fan 25. One end of the exhaust pipe 24 is connected to the first adsorption tower 21 and the second adsorption tower 22 respectively, and the other end extends outward to connect to the main fan 25. The exhaust pipe 24 extracts the purified substances filtered in the first adsorption tower 21 and the second adsorption tower 22 through the main fan 25.

[0030] The desorption device 3 includes a hot steam pipe 31, which is connected to the first adsorption tower 21 and the second adsorption tower 22 respectively, and delivers hot steam into the first adsorption tower 21 and the second adsorption tower 22.

[0031] The desorption device 3 also includes a desorption pipe 32, a vacuum pump 33 connected to the desorption pipe 32, a desorption condenser 34, and a storage tank 35 connected to the desorption condenser 34. One end of the desorption pipe 32 is connected to the first adsorption tower 21 and the second adsorption tower 22, and the other end is connected to the desorption condenser 34. The vacuum pump 33 draws gas into the first adsorption tower 21 and the second adsorption tower 22 through the desorption pipe 32. The gas enters the desorption condenser 34, condenses into liquid, and then enters the storage tank 35. The storage tank 35 is connected to a drain pipe 36, and the liquid in the storage tank 35 is discharged through the drain pipe 36. Preferably, a vacuum filter 37 is installed on the desorption pipe 32. The vacuum filter 37 is used to filter the vapor passing through the desorption pipe 32.

[0032] Furthermore, the first adsorption tower 21 and the second adsorption tower 22 are connected by a steam condensate drain pipe 38.

[0033] In another embodiment, the present invention provides a safety control device 4 for a hexane waste gas treatment device. The safety control device 4 includes a nitrogen generator 41 and a conveying pipe 42 connected to the nitrogen generator 41. The nitrogen generator 41 is a prior art device used to produce nitrogen gas. One end of the conveying pipe 42 is connected to the nitrogen generator 41, and the other end is connected to the first adsorption tower 21 and the second adsorption tower 22 respectively.

[0034] In another embodiment, the present invention provides a hexane waste gas treatment device equipped with a cooling device 5. The cooling device 5 includes a cooling pipe 51, a surface cooler 52 installed on the cooling pipe 51, and a cooling fan 53. The cooling pipe 51 is connected to the first adsorption tower 21 and the second adsorption tower 22. The cooling fan 53 draws air through the cooling pipe 51, the surface cooler 52 cools the air, and then the air enters the first adsorption tower 21 and the second adsorption tower 22.

[0035] In another embodiment, the number of desorption condensers 34 and the number of liquid storage tanks 35 connected to the desorption condensers 34 are a pair. The pair of liquid storage tanks 35 are respectively connected to a pair of desorption condensers 34. The desorption pipes 32 are connected in series with the pair of desorption condensers 34. The vacuum pump 33 draws the vapor from the first adsorption tower 21 and the second adsorption tower 22 and passes it through the pair of desorption condensers 34 in sequence.

[0036] When using the n-hexane waste gas treatment equipment of this utility model, the n-hexane waste gas enters through the inlet pipe 13, condenses and is discharged through the outlet pipe 14, and enters the first adsorption tower 21 or the second adsorption tower 22. After the first adsorption tower 21 or the second adsorption tower 22 adsorbs a predetermined amount, it is controlled by the valve 23 to enter another first adsorption tower 21 or the second adsorption tower 22. After filtration in the first adsorption tower 21 or the second adsorption tower 22, the pure substance filtered in the first adsorption tower 21 and the second adsorption tower 22 is extracted by the main fan 25 and discharged through the discharge pipe 24. When desorption is required, hot steam is supplied to the first adsorption tower 21 and the second adsorption tower 22 through the hot steam pipe 31 to heat the first adsorption tower 21 and the second adsorption tower 22, so that the n-hexane is removed. The vacuum pump 33 draws gas into the first adsorption tower 21 and the second adsorption tower 22 through the desorption pipe 32. The gas enters the desorption condenser 34, condenses into liquid and enters the storage tank 35.

[0037] When the volume concentration percentage of combustible gas in the first adsorption tower 21 and the second adsorption tower 22 is high within its explosion range, the nitrogen generator 41 produces nitrogen gas, which is then transported to the first adsorption tower 21 and the second adsorption tower 22 through the conveying pipe 42. When the temperature in the first adsorption tower 21 and the second adsorption tower 22 is high, the cooling fan 53 draws air through the cooling pipe 51, and the surface cooler 52 cools the air before it enters the first adsorption tower 21 and the second adsorption tower 22.

[0038] This utility model relates to a hexane waste gas treatment device, which features strong adsorption capacity. It condenses the hexane waste gas through a pre-cooling condenser, reducing the concentration of the hexane waste gas. Combined with the filtration of the first and second adsorption towers, it achieves more effective adsorption and improves the adsorption capacity.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hexane waste gas treatment device, characterized in that, It includes: The precooling device (1) is equipped with a precooling condenser (11), and the precooling condenser (11) is connected to an air inlet pipe (13); The adsorption device (2) includes a first adsorption tower (21), a second adsorption tower (22), and an outlet pipe (24) connecting the first adsorption tower (21) and the second adsorption tower (22). The first adsorption tower (21) and the second adsorption tower (22) are connected to the precooling condenser (11). The desorption device (3) includes a hot steam pipe (31) connecting the first adsorption tower (21) and the second adsorption tower (22) and a desorption pipe (32), wherein a desorption condenser (34) is provided at the end of the desorption pipe (32).

2. The hexane waste gas treatment equipment according to claim 1, characterized in that, The precooling device (1) includes a refrigeration unit (12), and the precooling condenser (11) is cooled by the refrigeration unit (12).

3. The hexane waste gas treatment equipment according to claim 2, characterized in that, The precooling device (1) includes a liquid outlet pipe (14), which is connected to the first adsorption tower (21) and the second adsorption tower (22) respectively, and a valve (23) is provided at the connection point.

4. The hexane waste gas treatment equipment according to claim 1, characterized in that, A main fan (25) is installed on the discharge pipe (24), and the discharge pipe (24) draws out the purified material filtered in the first adsorption tower (21) and the second adsorption tower (22) through the main fan (25).

5. The hexane waste gas treatment equipment according to claim 1, characterized in that, The desorption condenser (34) is connected to a liquid storage tank (35), and the liquid storage tank (35) is connected to a drain pipe (36).

6. The hexane waste gas treatment equipment according to claim 1, characterized in that, A vacuum filter (37) is installed on the desorption pipe (32), and the vacuum filter (37) filters the steam passing through the desorption pipe (32).

7. The hexane waste gas treatment equipment according to claim 1, characterized in that, The first adsorption tower (21) and the second adsorption tower (22) are connected by a steam condensate drain pipe (38).

8. The hexane waste gas treatment equipment according to claim 1, characterized in that, The first adsorption tower (21) and the second adsorption tower (22) are connected to a safety control device (4). The safety control device (4) includes a nitrogen generator (41) and a conveying pipe (42) connected to the nitrogen generator (41). The other end of the conveying pipe (42) is connected to the first adsorption tower (21) and the second adsorption tower (22) respectively.

9. The hexane waste gas treatment equipment according to claim 1, characterized in that, The first adsorption tower (21) and the second adsorption tower (22) are connected to a cooling device (5). The cooling device (5) includes a cooling pipe (51), a surface cooler (52) installed on the cooling pipe (51), and a cooling fan (53). The cooling pipe (51) is connected to the first adsorption tower (21) and the second adsorption tower (22).

10. The hexane waste gas treatment equipment according to claim 1, characterized in that, The number of the desorption condensers (34) is one pair, and the desorption pipe (32) is connected in series with the pair of desorption condensers (34).

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