Variable-treatment-capacity distributed treatment device for VOCs (Volatile Organic Compounds) escaping from petrochemical sewage

Abstract

The utility model relates to a petrochemical sewage escaping VOCs (Volatile Organic Compounds) distributed treatment device with variable treatment capacity, which is characterized by comprising an integrated frame, a treatment pipe section unit and an exhaust cap, and the integrated frame consists of a waste gas collecting box at the lower part and a fixed platform at the upper part; the fixed platform is welded and fixed to the waste gas collecting box through four reinforcing ribs, the exhaust cap is detachably installed on the fixed platform, a gas guide chamber is formed between the exhaust cap and the fixed platform, and a gas outlet pipe connector communicated with the gas guide chamber is arranged on one side of the exhaust cap. And the treatment pipe section unit is detachably mounted between the waste gas collection box and the fixed platform. According to the design, waste gas is treated in an array tube type combination mode, the waste gas treatment capacity of the device is increased and reduced by increasing and reducing the number of array tubes, and the problem of environmental pollution caused by the fact that waste gas in an oil separation tank, a lifting tank and the like is discharged into the atmosphere is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a decentralized treatment device for VOCs escaping from petrochemical wastewater with variable treatment capacity. Background Technology

[0002] In China's petroleum refining industry, the oil separators, booster tanks, and other exhaust outlets of wastewater collection and transportation systems have all been sealed. However, these locations must be equipped with exhaust gas treatment devices to meet emission standards before being discharged. The amount of exhaust gas generated at these locations is very unstable, and the existing treatment devices have a fixed capacity that cannot be adjusted according to actual conditions, which has significant limitations. Therefore, it is particularly important to design a decentralized treatment device for treating VOCs emitted from petrochemical wastewater in order to solve the above problems. Summary of the Invention

[0003] To address the aforementioned problems, this invention presents a variable-capacity decentralized VOCs treatment device for petrochemical wastewater. It utilizes a combination of array tubes to treat waste gas, and the waste gas treatment capacity of the device can be increased or decreased by adding or removing the number of array tubes, effectively preventing the emission of waste gas from oil separators, booster tanks, etc., into the atmosphere and causing environmental pollution.

[0004] To address the aforementioned technical problems, this utility model provides a decentralized VOCs treatment device for petrochemical wastewater with variable treatment capacity. The device comprises an integrated frame, a treatment pipe section unit, and an exhaust cap. The integrated frame consists of a lower waste gas collection box and an upper fixed platform. The fixed platform is welded and fixed to the waste gas collection box by four reinforcing ribs. The exhaust cap is detachably installed on the fixed platform, forming a gas guiding chamber between them. One side of the exhaust cap has an outlet pipe connector communicating with the gas guiding chamber. The treatment pipe section unit is detachably installed between the waste gas collection box and the fixed platform. The waste gas collection box is connected to the gas guiding chamber through the treatment pipe section unit. The bottom of the waste gas collection box has support legs for support, and one side of each leg has an inlet pipe connector communicating with the waste gas collection box. The bottom of the waste gas collection box has an outlet pipe connector connected to the wastewater tank outlet pipeline.

[0005] Furthermore: The top of the exhaust gas collection box is provided with nine processing ports, and each of the nine processing ports is provided with a fastening external threaded pipe section for connecting the processing pipe section unit. There are nine processing pipe section units, and the lower ends of the nine processing pipe section units pass through the fixed platform and are detachably connected to the outside of the nine fastening external threaded pipe sections respectively.

[0006] Furthermore: the treatment pipe section unit includes a tubular mounting part and an adsorption treatment unit, a catalytic oxidation unit, and an oxidative desulfurization unit arranged sequentially from top to bottom within the tubular mounting part. The lower end of the tubular mounting part is provided with an internal thread that matches the external threaded pipe section for fastening.

[0007] Furthermore: a raised rifling is provided inside the tightening external thread pipe section 30mm above the internal thread. Three upper and lower pressed packing boxes are provided inside the tightening external thread pipe section. The adsorption treatment unit, catalytic oxidation unit, and oxidative desulfurization unit are respectively filled into the three packing boxes. The packing box located at the bottom is positioned by the raised rifling. Multiple small-diameter vent holes are evenly distributed at the bottom of the three packing boxes. A protrusion is integrally formed around the top surface of the packing box, and a groove is integrally formed around the bottom surface of the packing box. The protrusion is inserted into the groove, and a first sealing strip with a circular cross-section is placed on the top of the protrusion in the groove. A second sealing strip with an L-shaped cross-section is installed at the bottom of the bottom packing box, and a box cover is installed on the top of the top packing box.

[0008] Furthermore, a membrane separation unit is detachably installed inside the aforementioned fastened external threaded pipe section.

[0009] Furthermore: the fixed platform is provided with a through hole for the processing pipe segment unit to pass through, and a guide sealing seat is provided at the bottom of the fixed platform directly below the through hole. The processing pipe segment unit passes through the center of the guide sealing seat, and an installation groove for installing a sealing ring is provided on the inner wall of the guide sealing seat. The processing pipe segment unit and the guide sealing seat are sealed by a sealing ring provided in the installation groove.

[0010] With the above structure, this invention utilizes a tube array combination for waste gas treatment. The waste gas treatment capacity of the device can be increased or decreased by adding or removing the number of tubes, effectively preventing the emission of waste gas from oil separators and booster tanks into the atmosphere and causing environmental pollution. The membrane separation unit used in this invention can effectively isolate most water vapor, with a VOCs throughput of over 95%. Furthermore, the unit's own resistance is no greater than 300 Pa, and the membrane flux can reach 80 m³ / m².h. The treatment capacity of each treatment tube section can reach 2.5 m³ / h. After all nine tube sections are installed, the waste gas treatment capacity can reach 22.5 m³ / h. When the waste gas volume at the treatment point reaches 0-22.5 m³ / h, the treatment tube sections can be appropriately increased or decreased according to the actual situation to maximize economic efficiency. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is the main view of the structure of this utility model.

[0014] In the diagram: 1 is the treatment pipe section unit, 2 is the exhaust cap, 3 is the waste gas collection box, 4 is the fixed platform, 5 is the reinforcing rib, 6 is the exhaust pipe connector, 7 is the support leg, 8 is the air inlet pipe connector, 9 is the liquid outlet pipe connector, and 10 is the guide sealing seat. Detailed Implementation

[0015] like Figure 1 and Figure 2 The illustrated decentralized VOCs treatment device for petrochemical wastewater includes an integrated frame, a treatment pipe section unit 1, and an exhaust cap 2. The integrated frame consists of a lower waste gas collection box 3 and an upper fixed platform 4. The fixed platform is welded and fixed to the waste gas collection box by four reinforcing ribs 5. The exhaust cap is detachably installed on the fixed platform, forming a gas guiding chamber between them. One side of the exhaust cap is provided with an outlet pipe connector 6 that communicates with the gas guiding chamber. The treatment pipe section unit is detachably installed between the waste gas collection box and the fixed platform. The waste gas collection box is connected to the gas guiding chamber through the treatment pipe section unit. The bottom of the waste gas collection box is provided with a support leg 7 for support, and one side of the support leg is provided with an inlet pipe connector 8 that communicates with the waste gas collection box. The bottom of the waste gas collection box is provided with an outlet pipe connector 9 that connects to the wastewater tank outlet pipeline. This utility model provides a treatment device on one side of the oil separator, lifting tank, or other exhaust gas outlet of the sewage collection and transportation system. Each treatment device is connected to the oil separator, lifting tank, or other exhaust gas outlet through an air inlet pipe joint. After the exhaust gas enters the exhaust gas collection box, it rises along the treatment pipe section unit, thereby using the treatment pipe section unit to treat the exhaust gas. The treated exhaust gas is then transported out through the air outlet pipe joint.

[0016] like Figure 1 and Figure 2The exhaust gas collection box shown has nine processing ports on its top. Above each of these ports, a threaded pipe section for connecting to a processing pipe segment unit is located on the top of the exhaust gas collection box. There are nine processing pipe segment units, each with its lower end passing through a fixed platform and detachably connected to the outside of one of the nine threaded pipe segments. The fixed platform has a through hole for the processing pipe segment units to pass through. A guide sealing seat 10 is located at the bottom of the fixed platform directly below the through hole. The processing pipe segment unit passes through the center of the guide sealing seat. The inner wall of the guide sealing seat has an installation groove for installing a sealing ring. The processing pipe segment unit and the guide sealing seat are sealed by the sealing ring located in the installation groove. When adjusting the processing capacity, a sealing cap can be detachably installed on the corresponding threaded pipe segment and the guide sealing seat after removing the processing pipe segment unit. This invention utilizes a combination of array tubes to treat waste gas. By increasing or decreasing the number of array tubes, the waste gas treatment capacity of the device can be increased or decreased, effectively preventing the discharge of waste gas from oil separators, lifting tanks, etc., into the atmosphere and causing environmental pollution.

[0017] The aforementioned processing pipe section unit includes a tubular mounting section and an adsorption treatment unit, a catalytic oxidation unit, and an oxidative desulfurization unit arranged sequentially from top to bottom within the tubular mounting section. The lower end of the tubular mounting section is provided with an internal thread that matches the external threaded pipe section for fastening.

[0018] A raised rifling is provided inside the tightening external thread pipe section 30mm above the internal thread. Three upper and lower pressed packing boxes are provided inside the tightening external thread pipe section. The adsorption treatment unit, catalytic oxidation unit and oxidative desulfurization unit are respectively filled into the three packing boxes. The packing box located at the bottom is positioned by the raised rifling. Multiple small-diameter vent holes are evenly distributed at the bottom of the three packing boxes. The top surface of the packing box has a protrusion integrally formed around its circumference, and the bottom surface of the packing box has a groove integrally formed around its circumference. The protrusion is inserted into the groove, and a first sealing strip with a circular cross section is placed on top of the protrusion in the groove. A second sealing strip with an L-shaped cross section is installed at the bottom of the bottom packing box, and a box cover is installed on the top of the top packing box.

[0019] A membrane separation unit is detachably installed within the aforementioned threaded pipe section. The membrane separation unit used in this device can effectively isolate most water vapor, achieving a VOCs throughput of over 95%. Furthermore, the unit's own resistance is no greater than 300 Pa, and the membrane flux can reach 80 m³ / m².h. Each treatment pipe section has a treatment capacity of 2.5 m³ / h. After all nine pipe sections are installed, the waste gas treatment capacity reaches 22.5 m³ / h. When the waste gas volume at the treatment point reaches 0-22.5 m³ / h, the number of treatment pipe sections can be appropriately increased or decreased according to the actual situation to maximize economic efficiency.

[0020] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should be considered within its protection scope.

Claims

1. A decentralized treatment device for VOCs escaping from petrochemical wastewater with variable treatment capacity, characterized in that: The system includes an integrated frame, a treatment pipe section unit (1), and an exhaust cap (2). The integrated frame consists of a lower exhaust gas collection box (3) and an upper fixed platform (4). The fixed platform is welded and fixed to the exhaust gas collection box by four reinforcing ribs (5). The exhaust cap is detachably installed on the fixed platform and forms a gas guide chamber between them. One side of the exhaust cap is provided with an exhaust pipe connector (6) that communicates with the gas guide chamber. The treatment pipe section unit is detachably installed between the exhaust gas collection box and the fixed platform. The exhaust gas collection box is connected to the gas guide chamber through the treatment pipe section unit. The bottom of the exhaust gas collection box is provided with a support leg (7) for support. One side of the support leg is also provided with an air inlet pipe connector (8) that communicates with the exhaust gas collection box. The bottom of the exhaust gas collection box is provided with an outlet pipe connector (9) that connects to the sewage tank outlet pipeline.

2. The decentralized treatment device for VOCs escaping petrochemical wastewater with variable treatment capacity according to claim 1, characterized in that: The exhaust gas collection box has nine processing ports on its top. Above each of the nine processing ports, there is a fastening external threaded pipe section for connecting the processing pipe section unit. There are nine processing pipe section units. The lower ends of the nine processing pipe section units pass through the fixed platform and are detachably connected to the outside of the nine fastening external threaded pipe sections.

3. The decentralized treatment device for VOCs escaping from petrochemical wastewater with variable treatment capacity according to claim 2, characterized in that: The treatment pipe section unit includes a tubular mounting part and an adsorption treatment unit, a catalytic oxidation unit, and an oxidative desulfurization unit arranged sequentially from top to bottom within the tubular mounting part. The lower end of the tubular mounting part is provided with an internal thread that matches the external threaded pipe section.

4. The decentralized treatment device for VOCs escaping petrochemical wastewater with variable treatment capacity according to claim 3, characterized in that: The internal threaded section, extending 30mm upwards, has a raised rifling groove inside. Three tightly packed packing boxes are installed within this section. The adsorption treatment unit, catalytic oxidation unit, and desulfurization oxidation unit are respectively filled into the three packing boxes. The bottom packing box is positioned by the raised rifling groove. Multiple small-diameter vent holes are evenly distributed at the bottom of each of the three packing boxes. A raised section is integrally formed around the top surface of each packing box, and a groove is integrally formed around the bottom surface. The raised section is inserted into the groove, and a first sealing strip with a circular cross-section is placed on top of the raised section within the groove. A second sealing strip with an L-shaped cross-section is installed at the bottom of the bottom packing box, and a cover is installed on the top of the top packing box.

5. A decentralized treatment device for VOCs escaping petrochemical wastewater with variable treatment capacity according to claim 2, characterized in that: A membrane separation unit is detachably installed inside the aforementioned fastened external threaded pipe section.

6. A decentralized treatment device for VOCs escaping petrochemical wastewater with variable treatment capacity according to claim 2, characterized in that: The fixed platform is provided with a through hole for the processing pipe segment unit to pass through. A guide sealing seat (10) is provided at the bottom of the fixed platform directly below the through hole. The processing pipe segment unit passes through the center of the guide sealing seat. An installation groove for installing a sealing ring is provided on the inner wall of the guide sealing seat. The processing pipe segment unit and the guide sealing seat are sealed by a sealing ring provided in the installation groove.

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