Closed dehydration and peculiar smell elimination equipment for sump oil storage tank

Abstract

The utility model relates to the technical field of chemical equipment, in particular to sealed dewatering and peculiar smell eliminating equipment for a sump oil storage tank, which can be used in a low-temperature environment, reduces the working difficulty of freezing and condensation prevention, reduces the labor amount of workers, can achieve a sealed discharge effect and cannot cause environmental peculiar smell. Comprising a dehydration tank main body, two saddles, a precipitation bin isolation plate, an overflow bin isolation plate, a plurality of channel steel reinforcing beams, a sewage inlet pipe, a water outlet pipe, an oil outlet pipe, a heating assembly, an inward view assembly, a pressure regulating assembly and a liquid level detection assembly, the precipitation bin isolation plate and the overflow bin isolation plate are installed on the left side and the right side of the interior of the dehydration tank body respectively, so that a precipitation bin and an overflow bin are formed on the left side and the right side of the dehydration tank body, and a plurality of channel steel reinforcing beams are evenly installed on the left side and the right side of the precipitation bin isolation plate and the overflow bin isolation plate; an electromagnetic valve is arranged on the sewage inlet pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a device for airtight dehydration and odor elimination of dirty oil storage tanks. Background Art

[0002] The rapid development of the petroleum and petrochemical industries has placed higher and higher requirements on the level of production technology and production automation. Low-level manual operations have greatly affected the improvement of the overall benefits of enterprises. The automatic dehydrator for storage tanks is a new generation of products developed and designed according to the needs of dehydration of storage tanks in the petrochemical industry. It is used in the petroleum and chemical industries, replacing the manual water cutting method of oil tanks, realizing automatic water cutting, greatly reducing the labor intensity of the operation work and the hydrogen sulfide poisoning phenomenon that occurs during manual water cutting, and reducing oil waste and environmental pollution. At the same time, it also meets the regulatory requirements of the petrochemical system for dark channel and pipeline discharge. For example, the automatic dehydrator for storage tanks proposed in the prior art announcement number CN202244855UU includes a cylinder, a float, a connecting rod and a drain valve, wherein the float is arranged in the cylinder, the connecting rod is fixed at the bottom of the cylinder, one end of the connecting rod is connected to the lower end of the float, and the other end of the connecting rod is connected to the valve core of the float. However, the current use of dehydration facilities is relatively simple, and there are many disadvantages in the process of use. For example, when the ambient temperature is below 0°C in winter, it is easy to cause the drain valve of the dehydration facility to freeze, and the dehydration facility will be frozen and unusable. The water in the dehydration facility must be cleaned after each dehydration. In addition, the anti-freezing and anti-condensation work is difficult, which increases the workload of employees. The dehydration facilities cannot be sealed, resulting in environmental odor, and phenomena such as excessive combustible gas and hydrogen sulfide often occur, which cannot guarantee the personal safety of enterprise employees. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a closed dehydration and odor elimination equipment for waste oil storage tanks which can be used in low temperature environments, reduces the difficulty of anti-freezing and anti-condensation work, reduces the workload of staff, can achieve a closed discharge effect, and will not cause environmental odor.

[0004] The utility model discloses a closed dehydration and odor elimination device for a waste oil storage tank, comprising a dehydration tank body, two saddles, a sedimentation bin isolation plate, an overflow bin isolation plate, a plurality of channel steel reinforcement beams, a sewage inlet pipe, a water outlet pipe, an oil outlet pipe, a heating component, an internal viewing component, a pressure regulating component and a liquid level detection component, saddles are installed on the left and right sides of the bottom of the dehydration tank body, the sedimentation bin isolation plate and the overflow bin isolation plate are respectively installed on the left and right sides of the interior of the dehydration tank body, so that the left and right sides of the dehydration tank body form a sedimentation bin and an overflow bin, a plurality of channel steel reinforcement beams are evenly installed on the left and right sides of the sedimentation bin isolation plate and the overflow bin isolation plate, a sewage inlet pipe is connected to the middle part of the bottom end of the dehydration tank body, an electromagnetic valve is arranged on the sewage inlet pipe, a water outlet pipe is connected to the bottom of the sedimentation bin, an oil outlet pipe is connected to the bottom of the overflow bin, the water outlet pipe and the oil outlet pipe are respectively connected to an external delivery pump, a heating component is installed on the side walls at the front and rear ends of the dehydration tank body, and an internal pressure regulating component is installed on the top of the dehydration tank body. The oil-containing sewage enters the dehydration tank body through the sewage inlet pipe, and the oil and water are separated by the sedimentation bin isolation plate and the overflow bin isolation plate inside the dehydration tank body. The sulfur-containing sewage is transported to the heavy asphalt device, the acid water stripping device or the water device through the water outlet pipe sewage delivery pump, and the dirty oil is transported to the heavy dirty oil storage tank in the tank area through the oil outlet pipe delivery pump. The pressure regulating component can maintain the pressure balance in the dehydration tank body when the dirty oil and sewage are delivered to prevent the storage tank from being pumped out. The dehydration tank body is sealed and will not cause environmental odor, which is beneficial to protecting the personal safety of employees of the enterprise. The internal visual component is convenient for observing the dehydration situation. The heating component can heat the inside of the dehydration tank body when the environment is below 0℃ in winter, reducing the difficulty of anti-freezing and anti-condensation work and reducing the workload of the staff. The liquid level detection component can prevent the occurrence of vacuum.

[0005] Preferably, the pressure regulating assembly includes an on-site pressure pipe, a remote pressure pipe, a breathing valve and a nitrogen pipe. The on-site pressure pipe is installed at the left end of the top of the dehydration tank body, the breathing valve is installed in the middle of the top of the dehydration tank body, the nitrogen pipe is installed on the right side of the top of the dehydration tank body, and the remote pressure pipe is installed between the breathing valve and the nitrogen pipe; the nitrogen pipe is connected to the nitrogen pipeline, and a regulating valve group is provided on the nitrogen pipe. When the dirty oil and sewage are transported out, it is automatically opened and closed according to the pressure setting value to maintain the pressure balance in the dehydration tank to prevent the storage tank from being pumped. When the pressure in the dehydration tank body exceeds the set value, the remote pressure pipe opens the valve to release the pressure to the low-wattage pipe network. At the same time, when the pressure in the tank reaches a positive pressure value or is lower than a negative pressure value, the breathing valve opens to maintain the pressure balance in the tank.

[0006] Preferably, the internal viewing component includes an observation tube, a sight glass, a scraper handle, a polytetrafluoroethylene sealing gasket, a locking nut, a positioning rubber ring, a scraper plate and a scraper. The observation tube is fixedly connected to the top of the dehydration tank body, the top of the observation tube is connected to the sight glass, the middle of the sight glass is rotatably installed with a scraper handle, the upper and lower ends of the scraper handle are installed with polytetrafluoroethylene sealing gaskets, the locking nut is screwed on the upper part of the scraper handle, the positioning rubber ring is sleeved on the lower outer wall of the scraper handle and is located above the polytetrafluoroethylene sealing gasket below, the bottom of the scraper handle is installed with a scraper plate, the scraper plate is installed on the scraper plate, and the scraper is in contact with the bottom of the sight glass; the sight glass and the observation tube are used to facilitate observation of the dehydration effect of the storage tank and reduce oil dehydration. During dehydration, the sight glass is prone to adhere to dirty oil, and the scraper handle can be rotated to drive the scraper to remove oil stains inside the sight glass to maintain clarity and facilitate observation of the dehydration situation.

[0007] Preferably, the heating assembly includes two arc-shaped heating boxes, two heaters, multiple groups of arc-shaped heating rods and a three-way water supply pipe. The two arc-shaped heating boxes are respectively fixedly mounted on the front and rear end side walls of the dehydration tank body. A heater is mounted on the top of the arc-shaped heating box, and a pressure regulating valve is arranged at the top left end of the arc-shaped heating box. Multiple arc-shaped heating rods are mounted on the heater, and the arc-shaped heating rods are located inside the arc-shaped heating box. The upper input ends of the two arc-shaped heating boxes are connected to the front and rear output ends of the three-way water supply pipe, and a water injection pipe is arranged in the middle of the three-way water supply pipe. When the environment is below 0°C in winter, heating liquid is input into the arc-shaped heating box through the three-way water supply pipe, and the heater is started to heat the liquid inside the arc-shaped heating box through the arc-shaped heating rod, thereby performing water bath heating on the inside of the dehydration tank body to keep it from freezing in winter, meet real-time use conditions, reduce the difficulty of anti-freezing and anti-condensation work, and reduce the workload of staff.

[0008] Preferably, the liquid level detection component includes two liquid level gauges, which are respectively installed on the rear side wall of the dehydration tank body and located in the sedimentation bin and the overflow bin respectively, and the liquid level gauges have low liquid level alarm and interlocking functions; the liquid levels in the sedimentation bin and the overflow bin are detected by the liquid level gauges to prevent the machine pump from being emptied.

[0009] Preferably, it also includes an oil and gas pipe, which is installed on the top right side of the dehydration tank body and is connected to the low-pressure gas system network through a pipeline; the gas generated by the dehydration tank body is discharged to the low-pressure gas system network through the oil and gas pipe, so that the oil and gas generated by the dehydration facility can achieve a closed discharge effect, will not cause environmental odor, and is beneficial to protecting the personal safety of enterprise employees.

[0010] Preferably, the outer surface of the dehydration tank body is painted with epoxy phenolic paint, and an aluminum silicate insulation layer is provided inside the dehydration tank body; this can increase the anti-corrosion effect of the dehydration tank body and improve the insulation effect when used in winter.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the pressure regulating component can maintain the pressure balance in the main body of the dehydration tank when the dirty oil and sewage are transported out, thus preventing the storage tank from being pumped out and causing no peculiar smell in the environment, which is beneficial to protecting the personal safety of employees of the enterprise; the internal viewing component is convenient for observing the dehydration situation; the heating component can heat the inside of the main body of the dehydration tank when the environment is below 0°C in winter, thus reducing the difficulty of antifreeze and anti-condensation work and reducing the workload of the staff; the liquid level detection component can prevent the occurrence of vacuum. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a front structural schematic diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the rear three-dimensional structure of the utility model;

[0015] Figure 4 It is a partial cross-sectional structural schematic diagram of the utility model;

[0016] Figure 5 It is a front cross-sectional structural schematic diagram of the utility model;

[0017] Markings in the attached figure: 1. Dehydration tank body; 2. Saddle; 3. Sedimentation bin isolation plate; 4. Overflow bin isolation plate; 5. Channel steel reinforcement beam; 6. Sewage inlet pipe; 7. Water outlet pipe; 8. Oil outlet pipe; 9. On-site pressure pipe; 10. Remote pressure pipe; 11. Observation tube; 12. Sight glass; 13. Scraper handle; 14. Teflon sealing gasket; 15. Locking nut; 16. Positioning rubber ring; 17. Scraper pressure sheet; 18. Scraper; 19. Breathing valve; 20. Nitrogen pipe; 21. Oil and gas pipe; 22. Liquid level meter; 23. Arc heating box; 24. Heater; 25. Arc heating rod; 26. Three-way water supply pipe. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0019] like Figures 1 to 5As shown, saddles 2 are installed on the left and right sides of the bottom of the dehydration tank body 1, the outer surface of the dehydration tank body 1 is painted with epoxy phenolic paint, an aluminum silicate insulation layer is arranged inside the dehydration tank body 1, and a sedimentation bin isolation plate 3 and an overflow bin isolation plate 4 are respectively installed on the left and right sides of the interior of the dehydration tank body 1, so that a sedimentation bin and an overflow bin are formed on the left and right sides of the dehydration tank body 1, and a plurality of channel steel reinforcement beams 5 are evenly installed on the left and right sides of the sedimentation bin isolation plate 3 and the overflow bin isolation plate 4, a sewage inlet pipe 6 is connected to the middle of the bottom end of the dehydration tank body 1, and a solenoid valve is arranged on the sewage inlet pipe 6, and the bottom of the sedimentation bin is connected to the sewage inlet pipe 6. A water outlet pipe 7 is connected, an oil outlet pipe 8 is connected to the bottom of the overflow bin, the water outlet pipe 7 and the oil outlet pipe 8 are respectively connected to the external delivery pump, the on-site pressure pipe 9 is installed at the left end of the top of the dehydration tank body 1, the breathing valve 19 is installed in the middle of the top of the dehydration tank body 1, the nitrogen pipe 20 is installed on the right side of the top of the dehydration tank body 1, the remote pressure pipe 10 is installed between the breathing valve 19 and the nitrogen pipe 20, the observation tube 11 is fixedly connected to the top of the dehydration tank body 1, the top of the observation tube 11 is connected to the sight glass 12, the middle of the sight glass 12 is rotatably installed with a scraper handle 13, and the scraper handle 13 is installed on the The lower two ends are provided with PTFE sealing gaskets 14, the locking nut 15 is screwed on the upper part of the scraper handle 13, the positioning rubber ring 16 is sleeved on the lower outer wall of the scraper handle 13, and is located above the lower PTFE sealing gasket 14, the bottom of the scraper handle 13 is provided with a scraper pressing piece 17, and a scraper 18 is installed on the scraper pressing piece 17, and the scraper 18 is in contact with the bottom of the sight glass 12, and two arc-shaped heating boxes 23 are respectively fixedly installed on the front and rear end side walls of the dehydration tank body 1, and a heater 24 is installed on the top of the arc-shaped heating box 23, and an adjustment is arranged on the left end of the top of the arc-shaped heating box 23. Pressure valve, multiple arc heating rods 25 are installed on the heater 24, and the arc heating rods 25 are located inside the arc heating box 23. The upper input ends of the two arc heating boxes 23 are connected to the front and rear output ends of the three-way water supply pipe 26. A water injection pipe is arranged in the middle of the three-way water supply pipe 26. Two liquid level gauges 22 are respectively installed on the rear side wall of the dehydration tank body 1, and are respectively located at the sedimentation bin and the overflow bin. The liquid level gauge 22 has low liquid level alarm and interlocking functions. The oil and gas pipe 21 is installed on the top right side of the dehydration tank body 1. The oil and gas pipe 21 is connected to the low-pressure gas system network through a pipeline;

[0020] The oily sewage enters the dehydration tank body 1 through the sewage inlet pipe 6. After the oil and water are separated separately through the sedimentation bin isolation plate 3 and the overflow bin isolation plate 4 inside the dehydration tank body 1, the sulfur-containing sewage is transported to the heavy asphalt device, the acid water stripping device or the water device through the water outlet pipe 7 sewage delivery pump, and the dirty oil is transported to the heavy dirty oil storage tank in the tank area through the oil outlet pipe 8 delivery pump. The nitrogen pipe 20 is connected to the nitrogen pipeline. The nitrogen pipe 20 is provided with a regulating valve group. When the dirty oil and sewage are delivered, they are automatically adjusted according to the pressure setting value. Automatic opening and closing maintains the pressure balance in the dehydration tank to prevent the storage tank from being suffocated. When the pressure in the dehydration tank body 1 exceeds the set value, the remote pressure pipe 10 opens the valve to release the pressure to the low-pressure pipe network. At the same time, when the pressure in the tank reaches a positive pressure value or is lower than the negative pressure value, the breathing valve 19 opens to maintain the pressure balance in the tank. The gas generated by the dehydration tank body 1 is discharged through the oil and gas pipe 21 to the low-pressure gas system pipe network in a closed manner, so that the oil and gas generated by the dehydration facility can be discharged in a closed manner without causing environmental odor. It is beneficial to protect the personal safety of enterprise employees. The liquid level in the sedimentation bin and the overflow bin is detected by the liquid level meter 22 to prevent the pump from being emptied. The sight glass 12 and the observation tube 11 are convenient for observing the dehydration effect of the storage tank to reduce oil dehydration. During dehydration, the sight glass 12 is easy to adhere to dirty oil. The scraper handle 13 can be rotated to drive the scraper 18 to remove the oil inside the sight glass 12 to maintain clarity and facilitate observation of dehydration. When the environment is below 0℃ in winter, the arc heating box 23 is supplied with water through the three-way water supply pipe 26. Input heating liquid, start the heater 24 to heat the liquid inside the arc heating box 23 through the arc heating rod 25, so as to perform water bath heating on the inside of the dehydration tank body 1 to keep it from freezing in winter, meet the conditions for real-time use, reduce the difficulty of anti-freezing and anti-condensation work, and reduce the workload of staff. The outer surface of the dehydration tank body 1 is painted with epoxy phenolic paint, and an aluminum silicate insulation layer is arranged in the dehydration tank body 1, which can increase the anti-corrosion effect of the dehydration tank body 1 and improve the insulation effect when used in winter.

[0021] like Figures 1 to 5As shown, the utility model is a closed dehydration and odor elimination equipment for waste oil storage tanks. When it is working, the oily sewage enters the dehydration tank body 1 through the sewage inlet pipe 6, and the oil and water are separated separately through the sedimentation bin isolation plate 3 and the overflow bin isolation plate 4 inside the dehydration tank body 1. The sulfur-containing sewage is transported to the heavy asphalt device, the acid water stripping device or the water device through the water outlet pipe 7 sewage delivery pump, and the waste oil is transported to the heavy waste oil storage tank in the tank area through the oil outlet pipe 8 delivery pump. The nitrogen pipe 20 is connected to the nitrogen pipeline. The nitrogen pipe 20 is provided with a regulating valve group. When the waste oil and sewage are delivered, it is automatically opened and closed according to the pressure setting value to maintain the pressure balance in the dehydration tank to prevent the storage tank from being pumped. When the pressure in the dehydration tank body 1 exceeds the set value, the remote pressure pipe 10 opens the valve to release the pressure to the low-wattage pipe network. At the same time, when the pressure in the tank reaches the positive pressure value or is lower than the negative pressure value, the breathing valve 19 opens to maintain the pressure balance in the tank. The sight glass 12 and the observation tube 11 are used to observe the dehydration effect of the storage tank and reduce oil dehydration. During dehydration, the sight glass 12 is easy to adhere to dirty oil. The scraper handle 13 can be rotated to drive the scraper 18 to remove the oil inside the sight glass 12 to maintain clarity and facilitate observation of the dehydration situation. The gas generated by the dehydration tank body 1 is discharged to the low-pressure gas system network through the oil and gas pipe 21 through the pipeline in a closed manner, so that the oil and gas generated by the dehydration facility can achieve a closed discharge effect without causing environmental odor. The liquid level in the sedimentation bin and the overflow bin is detected by the liquid level meter 22 to prevent the machine pump from being evacuated. When the environment is below 0°C in winter, the heating liquid is input into the arc heating box 23 through the three-way water supply pipe 26, and the heater 24 is started to heat the liquid inside the arc heating box 23 through the arc heating rod 25, thereby heating the inside of the dehydration tank body 1 in a water bath to keep it from freezing in winter and meet the conditions for real-time use.

[0022] The breathing valve 19, liquid level meter 22, heater 24 and arc heating rod 25 of the utility model of a closed dehydration and odor elimination device for a waste oil storage tank are purchased on the market. The technicians in this industry only need to install and operate them according to the accompanying instruction manual, without the need for the technicians in this field to make creative labor.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A closed dehydration and odor elimination device for waste oil storage tanks, characterized in that: The dewatering tank comprises a dewatering tank body (1), two saddles (2), a sedimentation bin isolation plate (3), an overflow bin isolation plate (4), a plurality of channel steel reinforcement beams (5), a sewage inlet pipe (6), a water outlet pipe (7), an oil outlet pipe (8), a heating component, an internal viewing component, a pressure regulating component and a liquid level detection component. The saddles (2) are installed on the left and right sides of the bottom of the dewatering tank body (1). The sedimentation bin isolation plate (3) and the overflow bin isolation plate (4) are installed on the left and right sides of the interior of the dewatering tank body (1), so that the left and right sides of the dewatering tank body (1) form a sedimentation bin and an overflow bin. The sedimentation bin isolation plate (3) and the overflow bin isolation plate (4) are installed on the left and right sides of the bottom of the dewatering tank body (1). ), a plurality of channel steel reinforcement beams (5) are evenly installed on the left and right sides of the dehydration tank body (1), a sewage inlet pipe (6) is connected to the middle of the bottom end of the dehydration tank body (1), a solenoid valve is arranged on the sewage inlet pipe (6), a water outlet pipe (7) is connected to the bottom of the sedimentation bin, an oil outlet pipe (8) is connected to the bottom of the overflow bin, the water outlet pipe (7) and the oil outlet pipe (8) are respectively connected to an external delivery pump, a heating component is installed on the front and rear end side walls of the dehydration tank body (1), an internal viewing component is installed on the top of the dehydration tank body (1), a pressure regulating component is installed on the top of the dehydration tank body (1), and a liquid level detection component is installed on the rear side wall of the dehydration tank body (1).

2. The equipment for dehydrating and eliminating odor of a waste oil storage tank according to claim 1, characterized in that: The pressure regulating assembly comprises an on-site pressure pipe (9), a remote pressure pipe (10), a breathing valve (19) and a nitrogen pipe (20), wherein the on-site pressure pipe (9) is installed at the left end of the top of the dehydration tank body (1), the breathing valve (19) is installed at the middle of the top of the dehydration tank body (1), the nitrogen pipe (20) is installed at the right side of the top of the dehydration tank body (1), and the remote pressure pipe (10) is installed between the breathing valve (19) and the nitrogen pipe (20).

3. The equipment for dehydrating and eliminating odor of a waste oil storage tank according to claim 1, characterized in that: The internal viewing assembly comprises an observation tube (11), a sight glass (12), a scraper handle (13), a polytetrafluoroethylene sealing gasket (14), a locking nut (15), a positioning rubber ring (16), a scraper pressing sheet (17) and a scraper (18). The observation tube (11) is fixedly connected to the top of the dehydration tank body (1), the top of the observation tube (11) is connected to the sight glass (12), the middle of the sight glass (12) is rotatably mounted with the scraper handle (13), and the scraper handle (13) is fixedly connected to the top of the dehydration tank body (1). 3) Teflon sealing gaskets (14) are installed at the upper and lower ends, a locking nut (15) is screwed on the upper part of the scraper handle (13), a positioning rubber ring (16) is sleeved on the lower outer wall of the scraper handle (13) and is located above the lower Teflon sealing gasket (14), a scraper pressing piece (17) is installed at the bottom of the scraper handle (13), a scraper (18) is installed on the scraper pressing piece (17), and the scraper (18) is in contact with the bottom of the sight glass (12).

4. The equipment for dehydrating and eliminating odor of a waste oil storage tank according to claim 1, characterized in that: The heating assembly comprises two arc-shaped heating boxes (23), two heaters (24), a plurality of groups of arc-shaped heating rods (25) and a three-way water supply pipe (26). The two arc-shaped heating boxes (23) are respectively fixedly mounted on the front and rear end side walls of the dehydration tank body (1). The top of the arc-shaped heating box (23) is equipped with a heater (24), and the top left end of the arc-shaped heating box (23) is provided with a pressure regulating valve. A plurality of arc-shaped heating rods (25) are mounted on the heater (24), and the arc-shaped heating rods (25) are located inside the arc-shaped heating box (23). The upper input ends of the two arc-shaped heating boxes (23) are connected to the front and rear output ends of the three-way water supply pipe (26), and a water injection pipe is provided in the middle of the three-way water supply pipe (26).

5. The equipment for dehydrating and eliminating odor of dirty oil storage tanks according to claim 1, characterized in that: The liquid level detection component comprises two liquid level gauges (22), which are respectively mounted on the rear side wall of the dehydration tank body (1) and are respectively located at the sedimentation bin and the overflow bin, and the liquid level gauges (22) have low liquid level alarm and interlocking functions.

6. The equipment for dehydrating and eliminating odor of a waste oil storage tank according to claim 1, characterized in that: It also includes an oil and gas pipe (21), which is installed on the top right side of the dehydration tank body (1), and the oil and gas pipe (21) is connected to the low-pressure gas system network through a pipeline.

7. The equipment for dehydrating and eliminating odor of a waste oil storage tank according to claim 1, characterized in that: The outer surface of the dehydration tank body (1) is painted with epoxy phenolic paint, and an aluminum silicate insulation layer is arranged inside the dehydration tank body (1).

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