Closed oil recovery system of micro-positive pressure dirty oil system

Abstract

The utility model relates to a closed oil recovery system of a micro-positive pressure sump oil system. The closed oil recovery system comprises an oil containing funnel, a buffer tank, a sump oil pump and an underground sump oil tank, the top of the buffer tank is connected with an oil containing funnel through a pipeline, a control valve is arranged on the pipeline connecting the buffer tank and the oil containing funnel, the bottom of the buffer tank is connected with a tank bottom valve through a pipeline, and the pipeline at the bottom of the buffer tank is connected with a dirty oil pipeline connected to an underground dirty oil tank through a connector. A balance line is arranged on one side of the buffer tank, and a regulating valve is arranged on the balance line; the underground sump oil tank is led out of the ground through a pipeline and connected to a sump oil pump inlet, and a sump oil pump outlet pipeline is connected to the device tank area sump oil tank. The problem of safe, effective and centralized recovery and storage of residual oil after a sampling bottle is replaced when a petrochemical enterprise takes a liquid oil sample is solved; the large potential safety hazard that oil product static accumulation is easily caused when an iron drum is carried when an oil drum is used for storing oil and a large number of oil drums are stored in a production area is avoided, and centralized recovery and storage of oil products in the later period are facilitated.

Description

Technical Field

[0001] The utility model relates to an oil product recovery system in a petrochemical production process, in particular to an oil product closed recovery system for a micro-positive pressure dirty oil system, belonging to the field of chemical equipment. Background Art

[0002] Petrochemical enterprises need to regularly sample and analyze the oil products in the production process. In order to ensure the accuracy of the samples, the sampling bottle needs to be replaced with oil three times when taking liquid oil samples. The oil products after replacement cannot be used as sample analysis and need to be uniformly recovered and processed. If these oil products are directly poured into 200L iron oil drums for storage, the iron drums will be moved back and forth, which can easily cause static electricity accumulation in the oil products, leading to safety accidents such as fires. At the same time, storing a large number of oil drums in the production area also poses a major safety hazard and is not convenient for the centralized recovery and storage of oil products in the later stage. It does not meet the safety production requirements and is not convenient for the centralized recovery and storage of oil products in the later stage.

[0003] At the same time, because the underground waste oil tank is in a slightly positive pressure state, if it is discharged directly into the underground waste oil system, it will be affected by the air resistance of the underground waste oil pipeline. The oil cannot rely on gravity to flow directly into the underground waste oil tank using a conventional funnel, and there is even a safety risk of oil spraying. Utility Model Content

[0004] In view of the fact that the above-mentioned oil products cannot be directly poured into underground waste oil tanks through ordinary funnels under normal pressure under micro-positive pressure conditions, the purpose of the utility model is to provide a closed oil recovery system for a micro-positive pressure waste oil system, which can directly and sealedly recover the oil products generated in the sampling process into underground waste oil tanks, and finally the oil products can be directly transferred into the waste oil tanks in the tank area of ​​the device for recovery after being collected in the underground waste oil tanks, thus avoiding the static electricity accumulation of the oil products caused by personnel carrying iron barrels back and forth after the oil products are loaded into barrels; at the same time, the recovery system is a closed recovery, which reduces the loss of oil products to a minimum, saves a large number of oil barrels, and avoids the safety hazards caused by storing a large number of oil barrels in the production area.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: a closed oil recovery system of a micro-positive pressure waste oil system, comprising: an oil funnel and a buffer tank and a waste oil pump, and an underground waste oil tank, which are arranged above the ground; the top of the buffer tank is connected to the oil funnel through a pipeline, a control valve is arranged on the pipeline connecting the buffer tank and the oil funnel, a tank bottom valve is connected to the bottom of the buffer tank through a pipeline, and the pipeline at the bottom of the buffer tank is connected to the waste oil pipeline connected to the underground waste oil tank through a joint; a balance line is arranged on one side of the buffer tank, and a regulating valve is arranged on the balance line; the pipeline on the underground waste oil tank is led out of the ground and connected to the inlet of the waste oil pump, and the outlet pipeline of the waste oil pump is connected to the waste oil tank in the tank area of ​​the device;

[0006] Furthermore, the control valve on the pipeline connecting the buffer tank and the oil funnel includes two hand valves connected in series, which are respectively the first hand valve and the second hand valve from top to bottom; the purpose of setting two valves in series is to prevent a single valve from leaking internally after long-term use, causing flammable oil and gas and other media to volatilize into the atmosphere;

[0007] Furthermore, one end of the balance line is connected to the top of the buffer tank, and the other end is connected to the pipeline at the bottom of the buffer tank below the tank bottom valve; the pressure balance between the buffer tank and the underground waste oil pipeline is controlled by adjusting the balance valve on the balance line;

[0008] Furthermore, the underground waste oil tank has a pressure of about 3KPa and is in a slightly positive pressure state;

[0009] Furthermore, the oil funnel has an opening at the top, and a rainproof cover is provided at the top of the opening, and the oil funnel is covered by the rainproof cover; the rainproof cover completely covers the opening at the top of the oil funnel;

[0010] Furthermore, an electrostatic grounding wire is provided on the side wall of the oil funnel to prevent static electricity from being generated due to flow friction when the oil is poured into the oil funnel.

[0011] Furthermore, the copper rain cover is a copper cover plate to prevent the cover plate from colliding with the edge of the funnel and generating sparks when opening and closing.

[0012] Furthermore, the oil funnel, buffer tank and valve are all made of carbon steel.

[0013] The process of the closed recovery system using the above structure is:

[0014] (1) Before use, first confirm that there is no oil in the oil funnel, and the first hand valve, second hand valve, tank bottom valve, and balance valve are all in the closed state;

[0015] (2) First open the movable copper rain cover, then slowly open the first and second hand valves to discharge a small amount of gas in the buffer tank;

[0016] (3) Slowly pour the oil to be recovered into the oil funnel, and then add the oil into the buffer tank through the oil funnel. It should be noted that the oil should not fill up the buffer tank.

[0017] (4) After the oil is added to the buffer tank, close the first hand valve and the second hand valve, and slowly open the balancing valve. At this time, the buffer tank and the underground waste oil pipeline are pressure balanced;

[0018] (5) Open the tank bottom valve. The oil in the buffer tank will flow naturally into the sealed underground waste oil tank by gravity.

[0019] (6) After the oil flows into the underground waste oil tank, the waste oil pump can be started according to the liquid level of the underground waste oil tank to send the oil to the waste oil tank in the tank area through the pipeline for unified recovery;

[0020] (7) After the oil is recovered, close the tank bottom valve and balance valve, and cover the movable copper rain cover.

[0021] The beneficial effects of the utility model are:

[0022] It solves the problem of safe, effective and centralized recovery and storage of remaining oil after replacing the sampling bottle when taking liquid oil samples in petrochemical enterprises; it avoids the major safety hazards of static electricity accumulation of oil products caused by moving iron drums when using oil drums to store oil and storing a large number of oil drums in the production area, meets the safety production requirements, and is also convenient for the centralized recovery and storage of oil products in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of the oil closed recovery system of the utility model.

[0024] In the figure, 1, oil funnel, 2, buffer tank, 3, waste oil pump, 4, underground waste oil tank, 5, tank bottom valve, 6, waste oil pipeline, 7, balance line, 8, balance valve, 9, ground, 10, first hand valve, 11, second hand valve, 12, rain cover, 13, static grounding wire. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0026] like Figure 1 The oil product closed recovery system of a micro-positive pressure waste oil system shown in the figure comprises: an oil funnel 1 and a buffer tank 2 and a waste oil pump 3, and an underground waste oil tank 4, which are arranged above the ground 9; the top of the buffer tank 2 is connected to the oil funnel 1 through a pipeline, a control valve is arranged on the pipeline connecting the buffer tank 2 and the oil funnel 1, a tank bottom valve 5 is connected to the bottom of the buffer tank 2 through a pipeline, and the pipeline at the bottom of the buffer tank 2 is connected to the waste oil pipeline 6 connected to the underground waste oil tank 4 through a joint; a balance line 7 is arranged on one side of the buffer tank 2, and a balance valve 8 is arranged on the balance line 7; the pipeline on the underground waste oil tank 4 is led out of the ground and connected to the inlet of the waste oil pump 3, and the outlet pipeline of the waste oil pump 3 is connected to the waste oil tank in the tank area of ​​the device;

[0027] The control valve on the pipeline connecting the buffer tank 2 and the oil funnel 1 includes two hand valves connected in series, which are respectively a first hand valve 10 and a second hand valve 11 from top to bottom;

[0028] One end of the balance line 7 is connected to the top of the buffer tank 2, and the other end is connected to the pipeline at the bottom of the buffer tank 2 below the tank bottom valve 5;

[0029] The oil funnel 1 has an opening at the top, and a rainproof cover 12 is provided at the top of the opening, and the oil funnel 1 is covered by the rainproof cover 12; the rainproof cover 12 completely covers the opening at the top of the oil funnel 1;

[0030] An electrostatic grounding wire 13 is also provided on the side wall of the oil funnel 1 to prevent static electricity from being generated by friction of the oil flow;

[0031] The rain cover 12 is a copper cover plate to prevent the cover plate from colliding with the edge of the funnel and generating sparks when opening and closing.

[0032] The oil funnel 1, buffer tank 2 and valve are all made of carbon steel.

[0033] The process of the closed recovery system using the above structure is:

[0034] (1) Before use, first confirm that there is no oil in the oil funnel 1, and the first hand valve 10, the second hand valve 11, the tank bottom valve 5, and the balance valve 8 are all in the closed state;

[0035] (2) First open the movable copper rain cover 12, then slowly open the first hand valve 10 and the second hand valve 11 to discharge a small amount of gas in the buffer tank 2;

[0036] (3) Slowly pour the oil to be recovered into the oil funnel 1, and then add the oil into the buffer tank 2 through the oil funnel 1. It should be noted that the oil should not fill up the buffer tank 2.

[0037] (4) After the oil is added to the buffer tank 2, close the first hand valve 10 and the second hand valve 11, and slowly open the balance valve 8. At this time, the pressure of the buffer tank 2 and the underground waste oil pipeline 6 is balanced;

[0038] (5) Open the tank bottom valve 5. The oil in the buffer tank 2 will flow naturally into the sealed underground waste oil tank 4 by gravity.

[0039] (6) After the oil product flows into the underground waste oil tank 4, the waste oil pump 3 can be started according to the liquid level of the underground waste oil tank 4 to send the oil product to the waste oil tank in the tank area through the pipeline for unified recovery;

[0040] (7) After the oil is recovered, close the tank bottom valve 5 and the balancing valve 8, and cover the movable copper rain cover 12.

[0041] The key points of this utility model are:

[0042] (1) Oil products can be directly discharged and recovered into the underground waste oil tank 4 in a closed manner, which does not cause waste of oil products and reduces material loss;

[0043] (2) The oil funnel 1 is provided with an electrostatic grounding wire 13, and the upper cover of the oil funnel 1 is an explosion-proof copper cover to avoid sparks generated by oil flow friction and collision of the upper cover of the opening and closing funnel, thereby achieving intrinsic safety;

[0044] (3) By setting the balance line 7 on the buffer tank 2, the oil product can be smoothly and hermetically added to the underground waste oil tank 4 with a slightly positive pressure without consuming any additional energy;

[0045] (4) It avoids the use of iron barrels to hold oil products, saves manpower in handling, and avoids the safety risk of static electricity generated by the friction of oil products during the transportation of iron barrels containing oil, thus eliminating the safety hazard of storing a large number of oil barrels on site.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A closed oil recovery system for a micro-positive pressure waste oil system, characterized in that: include: An oil funnel, a buffer tank, a waste oil pump and an underground waste oil tank are arranged above the ground; the top of the buffer tank is connected to the oil funnel through a pipeline, a control valve is arranged on the pipeline connecting the buffer tank and the oil funnel, the bottom of the buffer tank is connected to a tank bottom valve through a pipeline, and the pipeline at the bottom of the buffer tank is connected to the waste oil pipeline connected to the underground waste oil tank through a joint; a balance line is arranged on one side of the buffer tank, and a balance valve is arranged on the balance line; the pipeline on the underground waste oil tank is led out of the ground and connected to the inlet of the waste oil pump, and the outlet pipeline of the waste oil pump is connected to the waste oil tank in the tank area of ​​the device.

2. The closed oil recovery system for a micro-positive pressure waste oil system according to claim 1 is characterized by: The valve on the control pipeline connecting the buffer tank and the oil funnel includes two hand valves connected in series, which are respectively a first hand valve and a second hand valve from top to bottom.

3. The closed oil recovery system for a micro-positive pressure waste oil system according to claim 1 is characterized by: One end of the balance line is connected to the top of the buffer tank, and the other end is connected to the pipeline at the bottom of the buffer tank below the tank bottom valve.

4. The closed oil recovery system for a micro-positive pressure waste oil system according to claim 1 is characterized by: The oil funnel has an opening at the top, and a rainproof cover is provided at the top of the opening, through which the oil funnel is covered; the rainproof cover completely covers the opening at the top of the oil funnel.

5. The closed oil recovery system for a micro-positive pressure waste oil system according to claim 4 is characterized by: An electrostatic grounding wire is also provided on the side wall of the oil funnel.

6. The closed oil recovery system for a micro-positive pressure waste oil system according to claim 4 is characterized by: The rainproof cover is an explosion-proof copper cover.

7. The closed oil recovery system for a micro-positive pressure waste oil system according to claim 1 is characterized by: The oil funnel, buffer tank and valves are all made of carbon steel.

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