Oily sewage separation device and separation method of oil refining hydrogenation device

Abstract

The invention provides an oily sewage separation device of an oil refining hydrogenation device, which comprises a separation box, and a first partition plate and a second partition plate welded at the bottom of the separation box, and the first partition plate and the second partition plate divide the separation box into a left separation cavity, a middle separation cavity and a right separation cavity; the first-stage barrage plate and the second-stage barrage plate are respectively welded in the middle of the left separation cavity and the middle separation cavity, and the left separation cavity and the middle separation cavity are respectively divided into a front half cavity and a rear half cavity; the first-stage overflow pipe and the second-stage overflow pipe are respectively welded on the first partition plate and the second partition plate; the electric heating pipes are arranged in the left separation cavity, the middle separation cavity and the right separation cavity at the same time. According to the separation device, oil separation is achieved by conducting multi-stage overflow on heated oily sewage, continuous overflow separation can be achieved, the treatment capacity of the oily sewage is greatly improved, then the production efficiency is improved, and the device is low in manufacturing cost, convenient to repair and maintain, economical and applicable.

Description

Technical Field

[0001] The invention relates to an oil-water separation device, and in particular to an oil-containing wastewater separation device and a separation method for an oil refining hydrogenation device. Background Art

[0002] The existing oil refining hydrogenation unit contains a wastewater separation device with a complex structure, requiring stirring or other power output equipment, the cost of the device is high, and the oil-water separation is not continuous.

[0003] For example, Chinese patent CN202221661406.0 discloses an oil-containing wastewater separation device for an oil refining and hydrogenation device, the device includes a sludge collecting box, a separation box is fixedly installed on the top of the sludge collecting box, a filter assembly is fixedly installed inside the separation box, the filter assembly includes a filter cover, a lower filter screen and an upper filter screen are arranged on the top of the filter cover, a heating part is arranged between the lower filter screen and the upper filter screen, the heating part is used for sewage heating, and the heating part includes two symmetrically arranged conductors. The oil-containing wastewater separation device directly heats the water flow near the filter screen through a heating rod, and uses the heat of the water flow to heat the oil to keep the oil liquid in a liquid state, to avoid the oil solidifying on the filter screen or inside the separation box, causing the filter screen to be blocked, and the sewage is filtered multiple times by the filter cover and the filter screen, including a power dredging device.

[0004] As mentioned above, the existing oil refining and hydrogenation equipment has the problems of complex structure, high energy consumption, and poor oil-water separation effect. Summary of the invention

[0005] In view of the deficiencies in the above-mentioned prior art, the present invention provides an oily wastewater separation device and separation method for an oil refining and hydrogenation unit. The device separates the oil by performing multi-stage overflow on the heated oily wastewater, and can realize continuous overflow separation, thereby greatly improving the treatment capacity of the wastewater and further improving the production efficiency.

[0006] In order to achieve the above object, the present invention provides an oily wastewater separation device for an oil refining hydrogenation device, the oily wastewater separation device comprising:

[0007] A separation box, and a first partition plate and a second partition plate welded to the bottom of the separation box, wherein the first partition plate and the second partition plate separate the separation box into a left separation chamber, a middle separation chamber and a right separation chamber;

[0008] The first-level weir plate and the second-level weir plate are respectively welded to the middle of the left separation chamber and the middle separation chamber, and the left separation chamber and the middle separation chamber are divided into a front half chamber and a rear half chamber;

[0009] A primary overflow pipe and a secondary overflow pipe are welded to the first baffle and the second baffle, respectively;

[0010] The electric heating tube is arranged in the left separation chamber, the middle separation chamber and the right separation chamber at the same time.

[0011] In some embodiments, the oily wastewater separation device further comprises:

[0012] A liquid inlet pipe is arranged in the front half of the left separation chamber, and a liquid inlet port of the liquid inlet pipe is arranged on the left side wall of the left separation chamber;

[0013] The oil drain pipe is arranged on the right side wall of the right separation chamber.

[0014] In some of the embodiments, the liquid inlet of the liquid inlet pipe is higher than the top of the primary weir plate, and the primary weir plate is higher than the oil inlet of the primary overflow pipe.

[0015] In some embodiments, the oil inlet of the first overflow pipe is higher than the top of the second weir plate, the second weir plate is higher than the oil inlet of the second overflow pipe, and the oil inlet of the second overflow pipe is higher than the oil outlet of the oil outlet pipe.

[0016] In some embodiments, bottom plates are welded to the lower parts of the left separation chamber, the middle separation chamber and the right separation chamber respectively, and the bottom plates and the side walls of each separation chamber and the bottom of the separation box form a left heating chamber, a middle heating chamber and a right heating chamber respectively, and the electric heating tubes are respectively arranged in the left heating chamber, the middle heating chamber and the right heating chamber.

[0017] In some of the embodiments, the oily water separation device also includes a drain pipe, which is respectively arranged at the chamber bottom on both sides of the first weir plate of the left separation chamber, the chamber bottom on both sides of the second weir plate of the middle separation chamber, and the chamber bottom of the right separation chamber.

[0018] In some of the embodiments, control valves are installed on the liquid inlet pipe, oil discharge pipe and water discharge pipe; the electric heating pipe is supported by a pipe support or a pipe rack, and the wiring terminal of the electric heating pipe is located outside the separation box body.

[0019] In some of the embodiments, the liquid outlets of the liquid inlet pipe, the first overflow pipe and the second overflow pipe extend to the bottom of the left separation chamber, the middle separation chamber and the right separation chamber respectively.

[0020] In some of the embodiments, a temperature sensor and a liquid meter are installed on the liquid inlet pipe and the oil discharge pipe respectively; and a foam insulation layer is provided on the outside of the separation box.

[0021] The present invention also provides a method for separating oily wastewater from an oil refining hydrogenation device, which uses the oily wastewater separation device as described above to perform separation, and comprises the following steps:

[0022] The oily wastewater first enters the front half of the left separation chamber through the liquid inlet pipe for heating. After the oily wastewater is heated, the oil in the upper layer overflows through the top of the first-level weir plate into the back half of the left separation chamber for preliminary heating and overflow separation.

[0023] After the left separation chamber is heated and overflowed for oil-water separation, the initially separated oily wastewater flows from the primary overflow pipe into the front half of the middle separation chamber for heating and overflow, and then the upper layer of oil overflows through the top of the secondary weir plate to the back half of the middle separation chamber for continued oil-water overflow separation;

[0024] After further separation in the middle separation chamber, the oil and water overflow from the secondary overflow pipe to the right separation chamber for final oil-water overflow separation. The separated oil is discharged through the oil drain pipe at the top of the separation box, and the separated water is discharged from the drain pipe at the bottom of each separation chamber of the separation box.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The present invention provides an oil-containing wastewater separation device and a separation method for an oil refining hydrogenation device. The separation device realizes oil separation by multi-stage overflow of heated oil-containing wastewater, and can realize continuous overflow separation, greatly improving the treatment capacity of wastewater, thereby improving production efficiency. The device has low manufacturing cost, is easy to repair and maintain, and is economical and applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic structural diagram of an oily wastewater separation device of an oil refining hydrogenation device shown in an embodiment of the present invention;

[0029] in:

[0030] 1-Separation box;

[0031] 11-Left separation chamber;

[0032] 111-front half cavity;

[0033] 112-posterior cavity;

[0034] 12-middle separation chamber;

[0035] 13-right separation chamber;

[0036] 14- bottom plate;

[0037] 141-left heating chamber;

[0038] 142-intermediate heating chamber;

[0039] 143-right heating chamber;

[0040] 2- first partition;

[0041] 3- Second partition;

[0042] 4-First level weir slab;

[0043] 5-Secondary weir slab;

[0044] 6-First-level overflow pipe;

[0045] 7-Secondary overflow pipe;

[0046] 8-Electric heating tube;

[0047] 9-liquid inlet pipe;

[0048] 10-Oil drain pipe;

[0049] 101-Drain pipe. DETAILED DESCRIPTION

[0050] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the claims attached to the present invention.

[0051] Certain words are used in the specification and subsequent claims to refer to specific components or parts. It should be understood by those of ordinary skill in the art that technical users or manufacturers may refer to the same component or part by different nouns or terms. This specification and subsequent claims do not use differences in names as a way to distinguish components or parts, but use differences in the functions of components or parts as the criteria for distinction. "Including" and "comprising" mentioned throughout the specification and subsequent claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connect" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

[0052] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and "about", or "approximately", "substantially", "left and right" and the like indicating directions or positional relationships or parameters are all based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description content, and do not indicate or imply that the referred device or element must have a specific direction, specific size, or be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0053] See also Figure 1 An embodiment of the present invention provides an oil-containing wastewater separation device for an oil refining hydrogenation device, the oil-containing wastewater separation device comprising: a separation box 1, and a first baffle 2 and a second baffle 3 welded to the bottom of the separation box 1, the first baffle 2 and the second baffle 3 separate the separation box 1 into a left separation chamber 11, a middle separation chamber 12 and a right separation chamber 13; a primary weir plate 4 and a secondary weir plate 5, respectively welded to the middle of the left separation chamber 11 and the middle separation chamber 12, the left separation chamber 11 and the middle separation chamber 12 are separated into a front half chamber 111 and a rear half chamber 112; a primary overflow pipe 6 and a secondary overflow pipe 7, the number of the primary overflow pipe 6 is at least 3, the number of the secondary overflow pipe 7 is at least 1 There are at least three of them, and the first-level overflow pipe 6 and the second-level overflow pipe 7 are evenly welded on the first partition 2 and the second partition 3 respectively; the electric heating pipe 8 is arranged in the left separation chamber 11, the middle separation chamber 12 and the right separation chamber 13 at the same time. Specifically, the lower parts of the left separation chamber 11, the middle separation chamber 12 and the right separation chamber 13 are respectively welded with bottom plates 14, and the bottom plates 14 and the side walls of each separation chamber and the bottom of the separation box 1 respectively form a left heating chamber 141, a middle heating chamber 142 and a right heating chamber 143. There are three groups of electric heating pipes 8, and the electric heating pipes 8 are respectively arranged in the left heating chamber 141, the middle heating chamber 142 and the right heating chamber 143.

[0054] Among them, the oily wastewater separation device also includes: a liquid inlet pipe 9, which is arranged in the front half chamber 111 of the left separation chamber 11, and the liquid inlet of the liquid inlet pipe 9 is arranged on the left side wall of the left separation chamber 11; an oil drain pipe 10, which is arranged on the right side wall of the right separation chamber 13, and the oil drain pipes 10 are arranged in two rows, upper and lower, with at least three in each row.

[0055] Among them, in this embodiment, the liquid inlet of the liquid inlet pipe 9 is higher than the top of the first-level weir plate 4, and the first-level weir plate 4 is higher than the oil inlet of the first-level overflow pipe 6; the oil inlet of the first-level overflow pipe 6 is higher than the top of the second-level weir plate 5, and the second-level weir plate 5 is higher than the oil inlet of the second-level overflow pipe 7, and the oil inlet of the second-level overflow pipe 7 is higher than the oil discharge port of the oil discharge pipe 10.

[0056] Among them, the oily wastewater separation device also includes a drain pipe 101, the number of which is 5. The drain pipes 101 are respectively arranged at the chamber bottom on both sides of the first-level weir plate 4 of the left separation chamber 11, the chamber bottom on both sides of the second-level weir plate 5 of the middle separation chamber 12, and the chamber bottom of the right separation chamber 13. After each drain pipe 101 enters the drainage manifold, it is discharged to the next treatment process through a water pump, and the discharged sewage is measured.

[0057] Specifically, in this embodiment, control valves are installed on the liquid inlet pipe 9, the oil discharge pipe 10 and the water discharge pipe 101; the electric heating pipe 8 is supported by a pipe support or a pipe rack, and the connection terminal of the electric heating pipe 8 is located outside the separation box 1.

[0058] Specifically, the liquid outlets of the liquid inlet pipe 9 , the primary overflow pipe 6 and the secondary overflow pipe 7 in this embodiment extend to the bottom of the left separation chamber 11 , the middle separation chamber 12 and the right separation chamber 13 , respectively.

[0059] In this embodiment, the liquid inlet pipe 9 and the oil outlet pipe 10 are respectively equipped with a temperature sensor and a liquid meter for collecting data of the inlet and outlet liquids, and the collected data is used to operate the oil-water separation system through a controller. In this embodiment, the separation box 1 is provided with a foam insulation layer on its exterior.

[0060] Another embodiment of the present invention provides a method for separating oily wastewater from an oil refining hydrogenation device, which uses the oily wastewater separation device described in the above embodiment to perform separation, and includes the following steps:

[0061] The oily wastewater first enters the front half chamber 111 of the left separation chamber 11 through the liquid inlet pipe 9 for heating. After the oily wastewater is heated, the oil in the upper layer overflows through the top of the first-level weir plate 4 and enters the rear half chamber 112 of the left separation chamber 11 for preliminary heating and overflow separation.

[0062] After the left separation chamber 11 is heated and overflowed, the initially separated oily wastewater flows into the front half chamber 111 of the middle separation chamber 12 through the primary overflow pipe 6 for heating and overflowing. Then the upper layer of oil flows through the top of the secondary weir plate 5 to overflow to the rear half chamber 112 of the middle separation chamber 12 for further oil-water overflow separation.

[0063] The oil and water after further separation in the middle separation chamber 12 overflow from the secondary overflow pipe 7 to the right separation chamber 13 for final oil-water overflow separation. The separated oil is discharged through the oil drain pipe 10 at the top of the separation box 1, and the separated water is discharged through the drain pipe 101 at the bottom of each separation chamber of the separation box 1.

[0064] After oil-water separation is achieved through multi-stage oil-water heating overflow, continuous overflow separation can be achieved, which greatly increases the treatment capacity of sewage and thus improves production efficiency. The manufacturing cost of the device is low, it is easy to repair and maintain, and it is economical and applicable.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An oily wastewater separation device for an oil refining hydrogenation unit, characterized in that: The oily wastewater separation device comprises: A separation box, and a first partition plate and a second partition plate welded to the bottom of the separation box, wherein the first partition plate and the second partition plate separate the separation box into a left separation chamber, a middle separation chamber and a right separation chamber; The first-level weir plate and the second-level weir plate are respectively welded to the middle of the left separation chamber and the middle separation chamber, and the left separation chamber and the middle separation chamber are divided into a front half chamber and a rear half chamber; A primary overflow pipe and a secondary overflow pipe are welded to the first baffle and the second baffle, respectively; The electric heating tube is arranged in the left separation chamber, the middle separation chamber and the right separation chamber at the same time.

2. The oily wastewater separation device of the oil refining hydrogenation unit according to claim 1 is characterized in that: The oily wastewater separation device also includes: A liquid inlet pipe is arranged in the front half of the left separation chamber, and a liquid inlet port of the liquid inlet pipe is arranged on the left side wall of the left separation chamber; The oil drain pipe is arranged on the right side wall of the right separation chamber.

3. The oily wastewater separation device of the oil refining hydrogenation unit according to claim 2 is characterized in that: The liquid inlet of the liquid inlet pipe is higher than the top of the first-level weir plate, and the first-level weir plate is higher than the oil inlet of the first-level overflow pipe.

4. The oily wastewater separation device of the oil refining hydrogenation device according to claim 3 is characterized in that: The oil inlet of the primary overflow pipe is higher than the top of the secondary weir plate, the secondary weir plate is higher than the oil inlet of the secondary overflow pipe, and the oil inlet of the secondary overflow pipe is higher than the oil outlet of the oil outlet pipe.

5. The oily wastewater separation device of the oil refining hydrogenation device according to claim 1 is characterized in that: Bottom plates are welded to the lower parts of the left separation chamber, the middle separation chamber and the right separation chamber respectively. The bottom plates, the side walls of the separation chambers and the bottom of the separation box form a left heating chamber, a middle heating chamber and a right heating chamber respectively. The electric heating tubes are respectively arranged in the left heating chamber, the middle heating chamber and the right heating chamber.

6. The oily wastewater separation device of the oil refining hydrogenation device according to claim 2 is characterized in that: The oily wastewater separation device also includes a drain pipe, which is respectively arranged at the chamber bottom on both sides of the primary weir plate of the left separation chamber, the chamber bottom on both sides of the secondary weir plate of the middle separation chamber, and the chamber bottom of the right separation chamber.

7. The oily wastewater separation device of the oil refining hydrogenation device according to claim 6 is characterized in that: Control valves are installed on the liquid inlet pipe, oil discharge pipe and water discharge pipe; the electric heating pipe is supported by a pipe support or a pipe rack, and the wiring terminal of the electric heating pipe is located outside the separation box body.

8. The oily wastewater separation device of the oil refining hydrogenation device according to claim 2 is characterized in that: The liquid outlets of the liquid inlet pipe, the first overflow pipe and the second overflow pipe extend to the bottom of the left separation chamber, the middle separation chamber and the right separation chamber respectively.

9. The oily wastewater separation device of the oil refining hydrogenation device according to claim 2 is characterized in that: The liquid inlet pipe and the oil discharge pipe are respectively installed with a temperature sensor and a liquid meter; the outside of the separation box is provided with a foam insulation layer.

10. A method for separating oily wastewater from an oil refining hydrogenation unit, using the oily wastewater separation unit according to any one of claims 1 to 9 for separation, characterized in that: The steps include: The oily wastewater first enters the front half of the left separation chamber through the liquid inlet pipe for heating. After the oily wastewater is heated, the oil in the upper layer overflows through the top of the first-level weir plate into the back half of the left separation chamber for preliminary heating and overflow separation. After the left separation chamber is heated and overflowed for oil-water separation, the initially separated oily wastewater flows from the primary overflow pipe into the front half of the middle separation chamber for heating and overflow, and then the upper layer of oil overflows through the top of the secondary weir plate to the back half of the middle separation chamber for continued oil-water overflow separation; After further separation in the middle separation chamber, the oil and water overflow from the secondary overflow pipe to the right separation chamber for final oil-water overflow separation. The separated oil is discharged through the oil drain pipe at the top of the separation box, and the separated water is discharged from the drain pipe at the bottom of each separation chamber of the separation box.

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