Volatile organic compounds (VOCs) tail gas circulating condensation, recovery and purification device

Abstract

The utility model discloses a VOCs tail gas circulation condensation recovery purification device which comprises a condensation pipe, connecting sleeves are fixedly installed at the two ends of the condensation pipe, a gas outlet is formed in one side of the front face of the condensation pipe, a gas inlet is formed in the other side of the back of the condensation pipe, a coolant inlet is formed in the bottom of the connecting sleeve located on one side of the gas outlet, and a coolant outlet is formed in the bottom of the connecting sleeve located on the other side of the gas outlet. A coolant outlet is formed in the bottom, located on one side of the air inlet, of the connecting sleeve, a receiving groove is integrally connected to the bottom of the condensation pipe, a separation partition plate is fixedly installed in the receiving groove, and coolant through pipes located in the condensation pipe are fixedly installed on the opposite faces of the two connecting sleeves; and a discharge port is integrally formed in the bottom of the receiving groove. The device has the advantages of long and stable equipment operation, environmental protection, energy conservation, small occupied area and high equipment return on investment, the VOCs gas purification rate can reach 97% in cooperation with the use of the treatment method, and the up-to-standard emission of tail gas is far realized.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas purification technology, specifically a VOCs exhaust gas circulation condensation recovery purification device. Background Technology

[0002] Refining enterprises break down petroleum into different products such as gasoline, diesel, kerosene, petroleum gas, and ethylene through high-temperature fractionation. Products such as lubricating oil, paraffin wax, and asphalt are byproducts of petroleum refining. VOCs are generated during the production, transportation, and storage of these products. These VOCs have complex compositions, odors, and are harmful to human health and the natural environment.

[0003] Traditional methods for VOCs treatment both domestically and internationally include absorption, adsorption, catalytic combustion, and biological methods. However, each of these traditional methods has its own drawbacks, limiting their widespread adoption. Specific drawbacks include: 1. Absorption and adsorption methods suffer from secondary pollution from old absorbents and adsorbents, and require frequent replacement of absorbents, resulting in high daily operating costs; 2. Catalytic combustion methods, with their large initial investment and high operating costs, also limit their use by small and medium-sized enterprises; 3. Biological methods for VOCs removal require large equipment footprints, and their removal rate is easily affected by factors such as exhaust gas concentration and toxicity, making it difficult for existing treatment technologies to meet emission standards.

[0004] Therefore, we propose a VOCs exhaust gas recirculation condensation recovery and purification device. Utility Model Content

[0005] The purpose of this invention is to provide a VOCs exhaust gas recirculation, condensation, recovery, and purification device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a VOCs exhaust gas recirculation condensation recovery and purification device, comprising a condenser pipe, with connecting sleeves fixedly installed at both ends of the condenser pipe, an outlet provided on one side of the front of the condenser pipe, and an inlet provided on the other side of the back of the condenser pipe, a coolant inlet provided at the bottom of the connecting sleeve located on the outlet side, and a coolant outlet provided at the bottom of the connecting sleeve located on the inlet side, with a receiving groove integrally connected to the bottom of the condenser pipe, and a separation partition fixedly installed inside the receiving groove, the two connecting sleeves being positioned opposite each other... A coolant pipe is fixedly installed inside the condenser tube. The bottom of the receiving tank is integrally provided with a discharge port. A connecting pipe is integrally connected to the middle of the separation baffle. A guide groove is opened at the bottom of the connecting pipe. A sealing ring located above the guide groove is integrally connected inside the connecting pipe. A movable frame is fixedly installed at the top inside the connecting pipe. A movable rod is slidably connected through the middle of the movable frame. A sealing plate is fixedly installed at the bottom of the movable rod. A float located above the separation baffle is fixedly installed at the top of the movable rod. A compression spring is sleeved on the outside of the movable rod.

[0007] Optionally, the top of the compression spring is in close contact with the bottom of the movable frame, the bottom of the compression spring is in close contact with the top of the sealing plate, the bottom of the sealing plate is in close contact with the top of the sealing ring, and a sealing rubber ring is provided on the top of the sealing ring.

[0008] Optionally, the two ends of the coolant pipe are respectively fixedly installed through the opposite surfaces of the two connecting sleeves, and the two ends of the coolant pipe are respectively connected to the interior of the connecting sleeves.

[0009] Optionally, a baffle plate is fixedly installed inside the condenser tube, and the coolant pipe is fixedly installed through the middle of the baffle plate. The baffle plates are arranged alternately inside the condenser tube.

[0010] Optionally, the connection between the air inlet and the condenser pipe is located between one side baffle and the connecting sleeve, and the connection between the air outlet and the condenser pipe is located between the other side baffle and the other connecting sleeve.

[0011] Optionally, the bottom of the connecting pipe is abutted against the bottom of the receiving groove, and the top of the connecting pipe is flush with the top of the separating partition.

[0012] Optionally, some of the coolant pipes are metal pipes with good thermal conductivity, and heat dissipation fins are integrally provided on the outer surface of the coolant pipes.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This VOCs exhaust gas circulation condensation recovery and purification device, through the setting of separation baffles and connecting pipes, pushes the float upward when the liquefied VOCs exhaust gas inside the condensation pipe reaches a certain depth. Then, the moving rod pulls the sealing plate upward, thereby separating the sealing plate from the sealing ring. The connecting pipe is opened, and the liquefied VOCs exhaust gas above the separation baffle flows into the receiving tank through the connecting pipe and is then discharged through the outlet. It has the advantages of long-term stable operation, environmental protection and energy saving, small footprint, and high return on investment. With the use of treatment methods, the VOCs gas purification rate can reach 97%, far exceeding the standard emission of exhaust gas.

[0015] 2. This VOCs exhaust gas circulation condensation recovery and purification device, by setting a connecting sleeve, sends coolant into the connecting sleeve through the coolant inlet, and then into the coolant passage pipe. The coolant exchanges heat with the VOCs exhaust gas through the coolant passage pipe and condenses it. The coolant after heat exchange flows out through the coolant outlet. At the same time, the VOCs exhaust gas is sent into the condenser pipe through the air inlet. Under the action of the bypass baffle, it fully contacts the coolant passage pipe, so that the VOCs exhaust gas is fully condensed, thereby improving the VOCs gas purification rate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a VOCs exhaust gas recirculation condensation recovery and purification device according to the present invention.

[0017] Figure 2 This is a schematic diagram of the condenser tube of a VOCs tail gas recirculation condensation recovery and purification device according to the present invention;

[0018] Figure 3 This is a schematic diagram of the turbulence baffle of a VOCs exhaust gas recirculation condensation recovery and purification device according to the present invention;

[0019] Figure 4 This is a schematic diagram of the connecting pipe of a VOCs exhaust gas recirculation condensation recovery and purification device according to this utility model.

[0020] In the diagram: 1. Condenser pipe; 2. Connecting sleeve; 3. Coolant inlet; 4. Coolant outlet; 5. Air inlet; 6. Air outlet; 7. Coolant through pipe; 8. Baffle plate; 9. Receiving groove; 10. Separation baffle plate; 11. Discharge outlet; 12. Connecting pipe; 13. Guide groove; 14. Sealing ring; 15. Movable frame; 16. Movable rod; 17. Sealing plate; 18. Compression spring; 19. Float. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 4 This utility model provides a VOCs exhaust gas circulation condensation recovery and purification device, including a condenser pipe 1, with connecting sleeves 2 fixedly installed at both ends of the condenser pipe 1. An outlet 6 is provided on one side of the front of the condenser pipe 1, and an inlet 5 is provided on the other side of the back of the condenser pipe 1. A coolant inlet 3 is provided at the bottom of the connecting sleeve 2 located on the side of the outlet 6, and a coolant outlet 4 is provided at the bottom of the connecting sleeve 2 located on the side of the inlet 5. A receiving groove 9 is integrally connected to the bottom of the condenser pipe 1, and a separation baffle 10 is fixedly installed inside the receiving groove 9. A coolant passage pipe 7 located inside the condenser pipe 1 is fixedly installed on the opposite sides of the two connecting sleeves 2. An outlet 11 is integrally provided at the bottom of the receiving groove 9. A connecting pipe 12 is integrally connected to the middle of the separation baffle 10. A guide groove 13 is opened at the bottom of the connecting pipe 12, and a sealing ring 14 located above the guide groove 13 is integrally connected inside the connecting pipe 12. A movable [unclear] is fixedly installed at the top inside the connecting pipe 12. The frame 15 has a movable rod 16 that slides through its middle. A sealing plate 17 is fixedly installed at the bottom of the movable rod 16, and a float 19 is fixedly installed at the top of the movable rod 16 above the separation baffle 10. A compression spring 18 is sleeved on the outside of the movable rod 16. By setting the separation baffle 10 and the connecting pipe 12, when the liquefied VOCs exhaust gas inside the condenser 1 reaches a certain depth, it pushes the float 19 to move upward, which in turn pulls the sealing plate 17 upward through the movable rod 16, thereby separating the sealing plate 17 from the sealing ring 14. The connecting pipe is then open, and the liquefied VOCs exhaust gas above the separation baffle 10 flows into the receiving tank 9 through the connecting pipe 12 and is then discharged through the outlet 11. It has the advantages of long-term stable operation, environmental protection and energy saving, small footprint, and high return on investment. With the use of the treatment method, the VOCs gas purification rate can reach 97%, far exceeding the standard emission of exhaust gas.

[0023] The top of the compression spring 18 is in close contact with the bottom of the movable frame 15, the bottom of the compression spring 18 is in close contact with the top of the sealing plate 17, and the bottom of the sealing plate 17 is in close contact with the top of the sealing ring 14. A sealing rubber ring is provided on the top of the sealing ring 14. The two ends of the coolant pipe 7 are respectively fixedly installed through the opposite surfaces of the two connecting sleeves 2. The two ends of the coolant pipe 7 are respectively connected to the inside of the connecting sleeve 2. A baffle 8 is fixedly installed inside the condenser pipe 1. The coolant pipe 7 is fixedly installed through the middle of the baffle 8. The baffles 8 are arranged alternately inside the condenser pipe 1. The connection between the air inlet 5 and the condenser pipe 1 is located between one baffle 8 and the connecting sleeve 2. The connection between the air outlet 6 and the condenser pipe 1 is located on the other side. Between the baffle 8 and another connecting sleeve 2, the bottom of the connecting pipe 12 is tightly abutted against the bottom of the receiving groove 9, and the top of the connecting pipe 12 is flush with the top of the separation baffle 10. Several coolant pipes 7 are metal pipes with good thermal conductivity. The outer surface of the coolant pipes 7 is integrally provided with heat dissipation fins. By setting the connecting sleeve 2, the coolant is sent into the connecting sleeve 2 through the coolant inlet 3 and then into the coolant pipes 7. The coolant exchanges heat with the VOCs exhaust gas through the coolant pipes 7 and condenses. The coolant after heat exchange flows out through the coolant outlet 4. At the same time, the VOCs exhaust gas is sent into the condenser pipe 1 through the air inlet 5. Under the action of the bypass baffle, it fully contacts the coolant pipes 7, so that the VOCs exhaust gas is fully condensed and the VOCs gas purification rate is improved.

[0024] Working principle:

[0025] Coolant is fed into connecting sleeve 2 through coolant inlet 3, and then into coolant pipe 7. It exchanges heat with VOCs exhaust gas through coolant pipe 7, causing condensation. The cooled coolant then flows out through coolant outlet 4. VOCs exhaust gas is then fed into condenser pipe 1 through air inlet 5. Under the action of the bypass baffle, it fully contacts coolant pipe 7, allowing the VOCs exhaust gas to fully condense. When the liquefied VOCs exhaust gas inside condenser pipe 1 reaches a certain depth, it pushes float 19 upward, which in turn pulls sealing plate 17 upward via movable rod 16. This causes sealing plate 17 to separate from sealing ring 14, opening the connecting pipe. The liquefied VOCs exhaust gas above separation baffle 10 flows into receiving tank 9 through connecting pipe 12, and then is discharged through outlet 11. This system has the advantages of long-term stable operation, environmental protection and energy saving, small footprint, and high return on investment. With the use of the treatment method, the VOCs gas purification rate can reach 97%, far exceeding the standard emission standards.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A VOCs exhaust gas recirculation condensation recovery and purification device, comprising a condenser tube (1), characterized in that, The condenser tube (1) is fixedly fitted with connecting sleeves (2) at both ends. An outlet (6) is provided on one side of the front of the condenser tube (1), and an inlet (5) is provided on the other side of the back of the condenser tube (1). A coolant inlet (3) is provided at the bottom of the connecting sleeve (2) located on the side of the outlet (6), and a coolant outlet (4) is provided at the bottom of the connecting sleeve (2) located on the side of the inlet (5). A receiving groove (9) is integrally connected to the bottom of the condenser tube (1). A separation partition (10) is fixedly installed inside the receiving groove (9). A coolant passage pipe (7) located inside the condenser tube (1) is fixedly installed on the opposite sides of the two connecting sleeves (2). The bottom of the receiving groove (9) is integrally fitted with... The device has an outlet (11), and a connecting pipe (12) is integrally connected to the middle of the separation partition (10). A guide groove (13) is opened at the bottom of the connecting pipe (12). A sealing ring (14) located above the guide groove (13) is integrally connected inside the connecting pipe (12). A movable frame (15) is fixedly installed at the top inside the connecting pipe (12). A movable rod (16) is slidably connected through the middle of the movable frame (15). A sealing plate (17) is fixedly installed at the bottom of the movable rod (16). A float (19) located above the separation partition (10) is fixedly installed at the top of the movable rod (16). A compression spring (18) is sleeved on the outside of the movable rod (16).

2. The VOCs tail gas recirculation condensation recovery and purification device according to claim 1, characterized in that, The top of the compression spring (18) is in close contact with the bottom of the movable frame (15), the bottom of the compression spring (18) is in close contact with the top of the sealing plate (17), the bottom of the sealing plate (17) is in close contact with the top of the sealing ring (14), and a sealing rubber ring is provided on the top of the sealing ring (14).

3. The VOCs tail gas recirculation condensation recovery and purification device according to claim 1, characterized in that, The two ends of the coolant pipe (7) are respectively fixedly installed through the opposite surfaces of the two connecting sleeves (2), and the two ends of the coolant pipe (7) are respectively connected to the interior of the connecting sleeves (2).

4. The VOCs tail gas recirculation condensation recovery and purification device according to claim 1, characterized in that, A baffle plate (8) is fixedly installed inside the condenser tube (1). The coolant pipe (7) is fixedly installed through the middle of the baffle plate (8). The baffle plates (8) are arranged alternately inside the condenser tube (1).

5. A VOCs tail gas recirculation condensation recovery and purification device according to claim 4, characterized in that, The connection between the air inlet (5) and the condenser pipe (1) is located between one side baffle (8) and the connecting sleeve (2), and the connection between the air outlet (6) and the condenser pipe (1) is located between the other side baffle (8) and the other connecting sleeve (2).

6. The VOCs tail gas recirculation condensation recovery and purification device according to claim 1, characterized in that, The bottom of the connecting pipe (12) is abutted against the bottom of the inside of the receiving groove (9), and the top of the connecting pipe (12) is flush with the top of the separating partition (10).

7. The VOCs tail gas recirculation condensation recovery and purification device according to claim 1, characterized in that, Several of the coolant pipes (7) are metal pipes with good thermal conductivity, and heat dissipation fins are integrally provided on the outer surface of the coolant pipes (7).

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