Ultra-low VOCs emission oil gas recovery and treatment device

Abstract

The utility model belongs to the technical field of organic waste gas recovery and treatment, and particularly relates to an ultralow VOCs emission oil gas recovery and treatment device which comprises an oil gas separation tower and a compressor, a filtering device is arranged on the right side of the compressor, a condensing device is arranged between the oil gas separation tower and the compressor, and a separation device is arranged in the oil gas separation tower. According to the ultra-low VOCs emission oil gas recovery and treatment device, an oil gas mixture enters the filter box through the gas inlet pipe and sequentially passes through the three filter screens, so that large-particle impurities in the oil gas mixture are subjected to multi-stage interception and filtration, the purity of recovered oil liquid is ensured, and the recovery efficiency is improved. An oil-gas mixture subjected to dust removal is compressed through a compressor and then input into a condensation pipe for condensation, oil obtained through condensation is injected into a recycling box through an oil conveying pipe, and therefore recycling treatment of oil gas is achieved, and the recycled oil flows through a dirt collecting box; and impurities in the oil liquid are filtered and intercepted again through the filtering dense net arranged in the oil liquid filtering device, so that the purity of the oil liquid is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of organic waste gas recovery and treatment, in particular to an ultra-low VOCs emission oil and gas recovery and treatment device. Background Art

[0002] As a representative of traditional industries, the petrochemical industry emits a large amount of volatile organic pollutants (VOCs) during the production process, with complex components and great difficulty in treatment. Therefore, the air pollution problem caused by this has also received increasing attention. Traditional treatment methods for volatile organic pollutants (VOCs), such as absorption, adsorption, condensation and combustion, are difficult to achieve for low concentrations of VOCs, and photocatalytic degradation of VOCs has the problem of easy deactivation of catalysts. The use of catalytic combustion method is not restricted by the above conditions, but the investment cost is relatively large.

[0003] For example, Chinese patent announcement No. CN215886920U discloses an ultra-low VOCs emission oil and gas recovery and treatment device. When in use, the mixed oil and gas generated by breathing or loading and unloading vehicles in the storage tank area and the mixed gas of oil and gas and air generated during the operation of the production device are compressed to 0.390-0.686MPa by a compressor, and at the same time, they are cooled to below 5°C by a condenser and a condenser. The compressed and condensed condensate enters the liquid collecting pipe for recovery, and the non-condensable gas enters the membrane separation component. The VOCs component is preferentially adsorbed on the membrane surface, and the permeate side is vacuumed by a vacuum pump to maintain a negative pressure environment. Driven by the pressure difference on both sides of the membrane, the VOCs component The oil and gas with high concentration are separated and returned to the compressor inlet to repeat the above process together with the newly generated oil and gas, so that the oil and gas recovery rate can reach 95%. The oil and gas with low concentration on the membrane retentate side are controlled by the controller, flame arrester and one-way valve safety measures to control the concentration and temperature of VOCs waste gas entering the catalytic cracking regenerator to ensure the safety of VOCs waste gas transportation and treatment process. Since the heavy metals deposited on the surface of the catalytic cracking catalyst have a certain catalytic oxidation effect, it has a good VOCs removal effect at a relatively low combustion temperature (670-720℃).

[0004] However, the ultra-low VOCs emission oil and gas recovery and treatment device in the above application often contains certain smoke particle impurities in the recovered exhaust gas. If it is not treated, it may cause excessive impurities in the recovered oil, which requires cleaning again and affects the recovery efficiency. Therefore, there are certain limitations.

[0005] To this end, we urgently need to provide an ultra-low VOCs emission oil and gas recovery and treatment device. Utility Model Content

[0006] The purpose of the utility model is to provide an ultra-low VOCs emission oil and gas recovery and treatment device to solve the problem that the ultra-low VOCs emission oil and gas recovery and treatment device proposed in the above background technology often contains certain smoke particle impurities in the recovered exhaust gas. If it is not treated, it may cause excessive impurities in the recovered oil, which requires cleaning again and affects the recovery efficiency.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ultra-low VOCs emission oil and gas recovery and treatment device, comprising an oil and gas separation tower and a compressor, the compressor being installed on the right side of the oil and gas separation tower, a filtering device being arranged on the right side of the compressor, a condensing device being arranged between the oil and gas separation tower and the compressor, and a separation device being arranged inside the oil and gas separation tower.

[0008] The filtering device includes a filter box, an air intake pipe, a connecting pipe, and a filter assembly. The filter box is installed on the right side of the compressor, the air intake pipe is fixedly connected to the right side of the filter box, and the two ends of the connecting pipe are respectively installed on the air intake of the compressor and the left outer surface of the filter box. The three groups of filter assemblies are respectively installed inside the filter box.

[0009] A further improvement is that the filter assembly includes a filter screen, a sealing top cover, and a handle, the filter screen is installed inside the filter box, the sealing top cover is fixedly connected to the top of the filter screen, and the handle is fixedly connected to the top center of the sealing top cover.

[0010] A further improvement is that three installation grooves are equidistantly provided on the upper surface of the filter box, and the three filter screens are respectively inserted into the inside of the installation grooves, and the apertures of the three filter screens become smaller in sequence. The oil-gas mixture enters the interior of the filter box through the air intake pipe and passes through the three filter screens in sequence, so that large particles of impurities in the oil-gas mixture are intercepted and filtered at multiple stages through filter screens with different apertures to ensure the purity of the recovered oil, and the handle can be pulled regularly to remove the filter screen from the inside of the installation groove for cleaning to avoid clogging of the filter screen and affecting the interception and filtration effect.

[0011] A further improvement is that the condensing device includes a condenser body, a condensing pipe, an air pipe, an air delivery pipe, an oil pipe, a recovery box, and an intercepting assembly. The condenser body is installed on the top of the compressor, the condensing pipe is installed inside the condenser body, the air pipe is fixedly connected to the right end of the condensing pipe, and the bottom of the air delivery pipe is connected to the exhaust port of the compressor, the air delivery pipe is fixedly connected to the left end of the condensing pipe, the oil pipe is fixedly connected to the end of the air delivery pipe, the recovery box is installed at the rear end of the compressor, and the bottom of the oil pipe extends into the interior of the recovery box, and the intercepting assembly is installed inside the recovery box. The oil and gas mixture after dust removal is compressed by the compressor and then input into the interior of the condensing pipe through the air pipe for condensation, and the condensed oil is injected into the interior of the recovery box through the oil pipe, thereby realizing the recovery and treatment of oil and gas.

[0012] A further improvement is that the interception component includes a dirt collecting box, a filter mesh, and a pull ring. The dirt collecting box is installed inside the recovery box, the filter mesh is fixedly connected to the inner bottom of the dirt collecting box, and the pull ring is fixedly connected to the back center of the dirt collecting box. The recovered oil flows through the dirt collecting box on the top of the recovery box, and the impurities in the oil are filtered and intercepted again through the filter mesh arranged inside the dirt collecting box to ensure the purity of the oil.

[0013] A further improvement is that a push-pull groove is opened on the top left side of the back side of the recycling box, and the dirt collecting box is slidably connected to the inside of the push-pull groove. The pull ring is pulled regularly to take the dirt collecting box out of the push-pull groove to clean the impurities, thereby preventing impurities from clogging the filter mesh.

[0014] A further improvement is that the separation device includes a delivery pipe, an oil dispersion cap, an oil and gas cyclone plate, an oil outlet pipe, a drain pipe, an electric sealing valve, and an exhaust pipe. The delivery pipe is fixedly connected to the middle of the right outer surface of the oil and gas separation tower and is connected to the air supply pipe. The oil dispersion cap is installed in the middle of the interior of the oil and gas separation tower. The oil and gas cyclone plate is installed at the top of the interior of the oil and gas separation tower. The oil outlet pipe is fixedly connected to the middle and lower part of the left outer surface of the oil and gas separation tower. The drain pipe is fixedly connected to the bottom of the back of the oil and gas separation tower. The electric sealing valve is installed on the outer surface of the drain pipe. The exhaust pipe is fixedly connected to It is connected to the top of the oil and gas separation tower. The residual oil and gas after condensation are sent into the interior of the delivery pipe through the air delivery pipe and sprayed on the oil dispersion cap. The oil contained in the oil and gas falls to the surface of the oil dispersion cap and slides down. After sedimentation, the oil above the oil outlet pipe is discharged through the oil outlet pipe, and the remaining gas floats up and passes through the oil and gas cyclone plate. The rotational kinetic energy and centrifugal force are used to quickly separate the oil and gas, so that the oil in it is separated outward due to the centrifugal force, and the treated gas is discharged into the atmosphere through the exhaust pipe. The electric sealing valve is started regularly to discharge the oil and dirt deposited at the bottom of the oil and gas separation tower through the drain pipe.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. In this ultra-low VOCs emission oil and gas recovery and treatment device, the oil and gas mixture enters the interior of the filter box through the air inlet pipe and passes through three filter screens in sequence, so that the large particle impurities in the oil and gas mixture are intercepted and filtered at multiple stages through filter screens with different pore sizes to ensure the purity of the recovered oil.

[0017] 2. In the ultra-low VOCs emission oil and gas recovery and treatment device, the oil and gas mixture after dust removal is compressed by a compressor and then input into the condenser through the gas pipe for condensation. The condensed oil is injected into the recovery box through the oil pipe, thereby realizing the oil and gas recovery and treatment. The recovered oil flows through the dirt collecting box, and the impurities in the oil are filtered and intercepted again through the dense filter mesh arranged inside the box to ensure the purity of the oil.

[0018] 3. In this ultra-low VOCs emission oil and gas recovery and treatment device, the condensed oil and gas are sprayed onto the oil dispersion cap through the conveying pipe. The oil contained in the oil and gas falls to the surface of the oil dispersion cap and slides down, while the remaining gas floats up and passes through the oil and gas cyclone plate. The rotational kinetic energy and centrifugal force are used to quickly separate the oil and gas, so that the oil in it is separated outward due to the centrifugal force, and the treated gas is discharged into the atmosphere through the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view structural schematic diagram of the utility model;

[0020] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0021] Figure 3 This is a schematic diagram of the independent split structure of the filter device of the utility model;

[0022] Figure 4 This is a schematic diagram of the independent rear view split structure of the condensing device of the utility model;

[0023] Figure 5 It is a schematic diagram of the independent rear cross-sectional structure of the separation device of the utility model.

[0024] In the figure: 1. Oil-gas separation tower; 2. compressor; 301. filter box; 302. air inlet pipe; 303. connecting pipe; 304. filter assembly; 3041. filter screen; 3042. sealing top cover; 3043. handle; 401. condenser body; 402. condenser pipe; 403. air pipe; 404. air delivery pipe; 405. oil pipe; 406. recovery box; 407. interception assembly; 4071. dirt collecting box; 4072. filter mesh; 4073. pull ring; 501. delivery pipe; 502. oil dispersion cap; 503. oil-gas cyclone plate; 504. oil outlet pipe; 505. sewage pipe; 506. electric sealing valve; 507. exhaust pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0027] Embodiment 1:

[0028] An ultra-low VOCs emission oil and gas recovery and treatment device comprises an oil and gas separation tower 1 and a compressor 2, wherein the compressor 2 is installed on the right side of the oil and gas separation tower 1, a filtering device is arranged on the right side of the compressor 2, a condensing device is arranged between the oil and gas separation tower 1 and the compressor 2, and a separation device is arranged inside the oil and gas separation tower 1.

[0029] The filtering device includes a filter box 301, an air intake pipe 302, a connecting pipe 303, and a filter assembly 304. The filter box 301 is installed on the right side of the compressor 2, the air intake pipe 302 is fixedly connected to the right side of the filter box 301, and both ends of the connecting pipe 303 are respectively installed on the air intake of the compressor 2 and the left outer surface of the filter box 301. Three groups of filter assemblies 304 are respectively installed inside the filter box 301.

[0030] The filter assembly 304 includes a filter screen 3041 , a sealing top cover 3042 , and a handle 3043 . The filter screen 3041 is installed inside the filter box 301 , the sealing top cover 3042 is fixedly connected to the top of the filter screen 3041 , and the handle 3043 is fixedly connected to the top center of the sealing top cover 3042 .

[0031] The upper surface of the filter box 301 is provided with three installation grooves at equal intervals, and three filter screens 3041 are respectively inserted into the inside of the installation grooves, and the apertures of the three filter screens 3041 become smaller in sequence. The oil-gas mixture enters the inside of the filter box 301 through the air intake pipe 302, and passes through the three filter screens 3041 in sequence, so that the large particles of impurities in the oil-gas mixture are intercepted and filtered at multiple stages through the filter screens 3041 with different apertures, thereby ensuring the purity of the recovered oil. The handle 3043 can be pulled regularly to remove the filter screen 3041 from the inside of the installation groove for cleaning, so as to avoid the filter screen 3041 being blocked and affecting the interception and filtration effect.

[0032] The condensing device includes a condenser body 401, a condensing pipe 402, an air pipe 403, an air delivery pipe 404, an oil pipe 405, and a recovery box 406. The condenser body 401 is installed on the top of the compressor 2, the condensing pipe 402 is installed inside the condenser body 401, the air pipe 403 is fixedly connected to the right end of the condensing pipe 402, and its bottom is connected to the exhaust port of the compressor 2, the air delivery pipe 404 is fixedly connected to the left end of the condensing pipe 402, the oil pipe 405 is fixedly connected to the end of the air delivery pipe 404, the recovery box 406 is installed at the rear end of the compressor 2, and the bottom of the oil pipe 405 extends into the interior of the recovery box 406. The oil and gas mixture after dust removal is compressed by the compressor 2 and then input into the interior of the condensing pipe 402 through the air pipe 403 for condensation, and the condensed oil is injected into the interior of the recovery box 406 through the oil pipe 405, thereby realizing the recovery and treatment of oil and gas.

[0033] The separation device includes a delivery pipe 501, an oil dispersion cap 502, an oil and gas cyclone plate 503, an oil outlet pipe 504, a drain pipe 505, an electric sealing valve 506, and an exhaust pipe 507. The delivery pipe 501 is fixedly connected to the middle of the right outer surface of the oil and gas separation tower 1 and is connected to the air supply pipe 404. The oil dispersion cap 502 is installed in the middle of the interior of the oil and gas separation tower 1. The oil and gas cyclone plate 503 is installed at the top of the interior of the oil and gas separation tower 1. The oil outlet pipe 504 is fixedly connected to the middle and lower part of the left outer surface of the oil and gas separation tower 1. The drain pipe 505 is fixedly connected to the bottom of the back of the oil and gas separation tower 1. The electric sealing valve 506 is installed on the outer surface of the drain pipe 505. The exhaust pipe 507 is fixedly connected to At the top of the oil and gas separation tower 1, the residual oil and gas after condensation are sent into the interior of the delivery pipe 501 through the air delivery pipe 404 and sprayed on the oil dispersion cap 502. The oil contained in the oil and gas falls to the surface of the oil dispersion cap 502 and slides down. After sedimentation, the oil above the oil outlet pipe 504 is discharged through the oil outlet pipe 504, and the remaining gas floats up and passes through the oil and gas cyclone plate 503. The rotational kinetic energy and centrifugal force are used to quickly separate the oil and gas, so that the oil therein is separated outward due to the centrifugal force, and the treated gas is discharged into the atmosphere through the exhaust pipe 507. The electric sealing valve 506 is started regularly to discharge the oil and dirt deposited at the bottom of the oil and gas separation tower 1 through the drain pipe 505.

[0034] Embodiment 2:

[0035] On the basis of Example 1, the condensing device includes an intercepting component 407, which is installed inside the recycling box 406. The intercepting component 407 includes a dirt collecting box 4071, a filter mesh 4072, and a pull ring 4073. The dirt collecting box 4071 is installed inside the recycling box 406, the filter mesh 4072 is fixedly connected to the inner bottom of the dirt collecting box 4071, and the pull ring 4073 is fixedly connected to the back center of the dirt collecting box 4071.

[0036] The recovered oil flows through the dirt collecting box 4071 on the top of the recovery box 406, and the impurities in the oil are filtered and intercepted again by the filter mesh 4072 arranged inside the box to ensure the purity of the oil.

[0037] A push-pull groove is provided on the top left side of the back side of the recycling box 406, and the dirt collecting box 4071 is slidably connected to the inside of the push-pull groove. The pull ring 4073 is pulled regularly to take the dirt collecting box 4071 out of the push-pull groove to clean the impurities, so as to prevent the impurities from clogging the filter mesh 4072.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. An ultra-low VOCs emission oil and gas recovery and treatment device, comprising an oil and gas separation tower (1) and a compressor (2), wherein the compressor (2) is installed on the right side of the oil and gas separation tower (1), characterized in that: A filtering device is provided on the right side of the compressor (2), a condensing device is provided between the oil-gas separation tower (1) and the compressor (2), and a separation device is provided inside the oil-gas separation tower (1); The filtering device comprises a filter box (301), an air intake pipe (302), a connecting pipe (303), and a filter assembly (304); the filter box (301) is installed on the right side of the compressor (2); the air intake pipe (302) is fixedly connected to the right side of the filter box (301); two ends of the connecting pipe (303) are respectively installed on the air intake of the compressor (2) and the left outer surface of the filter box (301); and three groups of filter assemblies (304) are respectively installed inside the filter box (301).

2. The ultra-low VOCs emission oil and gas recovery and treatment device according to claim 1 is characterized by: The filter assembly (304) comprises a filter screen (3041), a sealing top cover (3042), and a handle (3043); the filter screen (3041) is installed inside the filter box (301); the sealing top cover (3042) is fixedly connected to the top of the filter screen (3041); and the handle (3043) is fixedly connected to the top center of the sealing top cover (3042).

3. The ultra-low VOCs emission oil and gas recovery and treatment device according to claim 2 is characterized by: The upper surface of the filter box (301) is provided with three installation grooves at equal intervals, and the three filter screens (3041) are respectively inserted into the inside of the installation grooves, and the apertures of the three filter screens (3041) become smaller in sequence.

4. The ultra-low VOCs emission oil and gas recovery and treatment device according to claim 1 is characterized by: The condensing device comprises a condenser body (401), a condensing tube (402), an air pipe (403), an air delivery pipe (404), an oil delivery pipe (405), a recovery box (406), and an interception assembly (407). The condenser body (401) is installed on the top of the compressor (2), the condensing tube (402) is installed inside the condenser body (401), the air pipe (403) is fixedly connected to the right end of the condensing tube (402), and its bottom is connected to the exhaust port of the compressor (2), the air delivery pipe (404) is fixedly connected to the left end of the condensing tube (402), the oil delivery pipe (405) is fixedly connected to the end of the air delivery pipe (404), the recovery box (406) is installed at the rear end of the compressor (2), and the bottom of the oil delivery pipe (405) extends into the interior of the recovery box (406), and the interception assembly (407) is installed inside the recovery box (406).

5. The ultra-low VOCs emission oil and gas recovery and treatment device according to claim 4 is characterized by: The interception assembly (407) comprises a dirt collecting box (4071), a dense filter mesh (4072), and a pull ring (4073); the dirt collecting box (4071) is installed inside the recovery box (406); the dense filter mesh (4072) is fixedly connected to the inner bottom of the dirt collecting box (4071); and the pull ring (4073) is fixedly connected to the back center of the dirt collecting box (4071).

6. The ultra-low VOCs emission oil and gas recovery and treatment device according to claim 5 is characterized by: A push-pull groove is provided at the top left side of the back side of the recycling box (406), and the dirt collecting box (4071) is slidably connected to the inside of the push-pull groove.

7. The ultra-low VOCs emission oil and gas recovery and treatment device according to claim 1 is characterized by: The separation device comprises a delivery pipe (501), an oil dispersion cap (502), an oil-gas cyclone plate (503), an oil outlet pipe (504), a sewage pipe (505), an electric sealing valve (506), and an exhaust pipe (507). The delivery pipe (501) is fixedly connected to the middle of the right outer surface of the oil-gas separation tower (1) and is connected to the air supply pipe (404). The oil dispersion cap (502) is installed in the middle of the interior of the oil-gas separation tower (1). The oil-gas cyclone plate (503) is installed at the top of the interior of the oil-gas separation tower (1). The oil outlet pipe (504) is fixedly connected to the middle and lower part of the left outer surface of the oil-gas separation tower (1). The sewage pipe (505) is fixedly connected to the bottom of the back of the oil-gas separation tower (1). The electric sealing valve (506) is installed on the outer surface of the sewage pipe (505). The exhaust pipe (507) is fixedly connected to the top of the oil-gas separation tower (1).

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