Raw oil stain oil deferrization and dehydration device

Abstract

The utility model discloses a deferrization and dehydration device for raw greasy oil. The deferrization and dehydration device comprises a washing and demulsification pretreatment unit; the outer wall of the dirty oil solid and iron removal unit is fixedly connected with the outer wall of the washing demulsification pretreatment unit through a pipeline; the utility model discloses a sump oil dehydration and deferrization unit, and relates to the technical field of petrochemical engineering. By arranging the washing demulsification pretreatment unit, the sump oil solid and iron removal unit and the sump oil dehydration and iron removal unit, the requirements of crude oil and sump oil dehydration and iron removal of petrochemical enterprises such as oil refineries are met, the iron content of crude oil entering the electric desalting device is reduced, the treatment capacity of the electric desalting device is increased, the service life of the electric desalting device is prolonged, and the cost is reduced. The investment cost of an electric desalting device is reduced, the situation that oil entering a refining device in the later period causes catalyst poisoning, and huge economic losses are caused is prevented, and the purpose of an original greasy oil deferrization and dehydration device is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical engineering, and particularly relates to a device for removing iron and water from crude oil and waste oil. Background Art

[0002] In the production process of petrochemical enterprises such as refineries, the treatment of crude oil and waste oil is a crucial link. However, there are many problems with traditional treatment methods when facing the needs of dehydrating and removing iron from crude oil and waste oil.

[0003] Crude oil often contains a relatively high content of iron impurities and water. These impurities not only affect the quality of crude oil but also bring a series of adverse consequences in subsequent processing. For example, a high iron content rate will seriously affect the electro - desalting device, reducing its processing capacity, shortening its service life, and increasing the investment costs of enterprises. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the technical solution adopted by the utility model to solve its technical problems is: a device for removing iron and water from crude oil and waste oil, including: a washing and demulsification pretreatment unit; the washing and demulsification pretreatment unit is used for demulsifying waste oil, a waste oil solid - removing and iron - removing unit, the outer wall of the waste oil solid - removing and iron - removing unit is fixedly connected to the outer wall of the washing and demulsification pretreatment unit through a pipeline; a waste oil dehydration and iron - removing unit, the outer wall of the waste oil dehydration and iron - removing unit is fixedly connected to the outer wall of the waste oil solid - removing and iron - removing unit through a pipeline; the waste oil dehydration and iron - removing unit includes a hot steam exhaust pipe, a horizontal centrifuge is fixedly connected to the outer wall of the hot steam exhaust pipe, an oil inlet pipe is fixedly connected to the outer wall of the horizontal centrifuge, an oil - water tank is fixedly connected to the bottom of the horizontal centrifuge, and an oil outlet pipe is fixedly connected to the inner wall of the oil - water tank.

[0005] The washing and demulsification pretreatment unit includes a heat - preservation tank, there are two groups of heat - preservation tanks, and the outer wall of each group of heat - preservation tanks is connected to a reagent box through a pipeline, a liquid inlet pipeline is fixedly connected to the outer wall of the heat - preservation tank, a liquid level gauge is fixedly connected to the inner wall of the reagent box, and the liquid level gauge is used to display the liquid level of the reagent box.

[0006] Preferably, the waste oil solid - removing and iron - removing unit includes a three - phase disc centrifuge, there are two groups of three - phase disc centrifuges, and an outlet liquid pipe two is fixedly connected to the outer wall of each group of three - phase disc centrifuges, an inlet liquid pipe two is fixedly connected to the outer wall of the three - phase disc centrifuge, a water outlet pipe is fixedly connected to the outer wall of the three - phase disc centrifuge, an oil tank is fixedly connected to the bottom of the three - phase disc centrifuge, the oil tank is used for storing waste oil, an outlet liquid pipe two is fixedly connected to the outer wall of the three - phase disc centrifuge, and a pump - out liquid pipe is fixedly connected to the inner wall of the oil tank.

[0007] Preferably, the outer wall of the pump delivery pipe is fixedly connected to the inner wall of the fuel tank. An infusion pump is fixedly connected to the outer wall of the pump delivery pipe. The inner wall of the fuel tank is fixedly connected to the outer wall of the second inlet pipe. The inner wall of the fuel tank is fixedly connected to the outer wall of the outlet pipe. The outer wall of the second inlet pipe is fixedly connected to the outer wall of the chemical agent box. The outer wall of the second outlet pipe is fixedly connected to the outer wall of the inlet oil pipe.

[0008] The beneficial effects of the present utility model are as follows:

[0009] 1. By providing a washing and demulsification pretreatment unit, a waste oil solid and iron removal unit, and a waste oil dehydration and iron removal unit, the present utility model solves the requirements for dehydration and iron removal of crude oil and waste oil in petrochemical enterprises such as refineries, reduces the iron content rate of the crude oil entering the electro - desalting device, increases the processing capacity of the electro - desalting device, extends the service life of the electro - desalting device, reduces the investment cost of the electro - desalting device, and prevents the catalyst poisoning caused by the oil products entering the refining device in the later stage, resulting in huge economic losses. Description of the Drawings

[0010] Figure 1 is the front view of the present utility model;

[0011] Figure 2 is the structural schematic diagram of the washing and demulsification pretreatment unit of the present utility model;

[0012] Figure 3 is the structural schematic diagram of the back of the washing and demulsification pretreatment unit of the present utility model;

[0013] Figure 4 is the structural schematic diagram of the waste oil dehydration and iron removal unit of the present utility model;

[0014] Figure 5 is the structural schematic diagram of the waste oil dehydration and iron removal unit of the present utility model.

[0015] In the figure: 1. Washing and demulsification pretreatment unit; 2. Waste oil solid and iron removal unit; 3. Waste oil dehydration and iron removal unit; 11. Heat preservation tank; 12. Chemical agent box; 13. Inlet liquid pipeline; 14. Liquid level gauge; 31. Hot steam exhaust pipe; 32. Horizontal centrifuge; 33. Oil - water tank; 34. Inlet oil pipe; 35. Outlet oil pipe; 22. Three - phase disc centrifuge; 23. Second inlet pipe; 24. Pump delivery pipe; 25. Outlet pipe; 26. Second outlet pipe; 27. Fuel tank. Specific Embodiments

[0016] The following further describes the present utility model in detail in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present utility model are given for purposes of illustration and description, and are not exhaustive or limited to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present utility model, and enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes.

[0017] Embodiment:

[0018] Please refer to Figure 1 - Figure 5 The present utility model provides a technical solution: an apparatus for removing iron and water from crude oil and waste oil, comprising: a washing and demulsification pretreatment unit 1; a waste oil solid and iron removal unit 2, the outer wall of the waste oil solid and iron removal unit 2 is fixedly connected to the outer wall of the washing and demulsification pretreatment unit 1 through a pipeline; a waste oil water and iron removal unit 3, the outer wall of the waste oil water and iron removal unit 3 is fixedly connected to the outer wall of the waste oil solid and iron removal unit 2 through a pipeline; the waste oil water and iron removal unit 3 includes a hot steam exhaust pipe 31, a horizontal centrifuge 32 is fixedly connected to the outer wall of the hot steam exhaust pipe 31, an oil inlet pipe 34 is fixedly connected to the outer wall of the horizontal centrifuge 32, an oil water tank 33 is fixedly connected to the bottom of the horizontal centrifuge 32, an outlet pipe 35 is fixedly connected to the inner wall of the oil water tank 33, the washing and demulsification pretreatment unit 1 includes a heat preservation tank 11, there are two groups of heat preservation tanks 11, and the outer wall of each group of heat preservation tanks 11 is connected to a chemical agent box body 12 through a pipeline, an inlet liquid pipeline 13 is fixedly connected to the outer wall of the heat preservation tank 11, the washing and demulsification pretreatment unit 1, the waste oil solid and iron removal unit 2 and the waste oil water and iron removal unit 3 are all fixed in a container.

[0019] A liquid level gauge 14 is fixedly connected to the inner wall of the chemical agent box body 12, the waste oil solid and iron removal unit 2 includes a three-phase disc centrifuge 22, there are two groups of three-phase disc centrifuges 22, and an outlet liquid pipe two 26 is fixedly connected to the outer wall of each group of three-phase disc centrifuges 22, an inlet liquid pipe two 23 is fixedly connected to the outer wall of the three-phase disc centrifuge 22, an outlet water pipe 25 is fixedly connected to the outer wall of the three-phase disc centrifuge 22, an oil tank 27 is fixedly connected to the bottom of the three-phase disc centrifuge 22, and the solid phase separated by the waste oil solid and iron removal unit 2 is transported out and collected in bags, and the liquid phase enters the oil tank 27 respectively.

[0020] An outlet pipe two 26 is fixedly connected to the outer wall of the three-phase disc centrifuge 22. A pump outlet pipe 24 is fixedly connected to the inner wall of the fuel tank 27. The outer wall of the pump outlet pipe 24 is fixedly connected to the inner wall of the fuel tank 27. The inner wall of the fuel tank 27 is fixedly connected to the outer wall of the inlet pipe two 23. The inner wall of the fuel tank 27 is fixedly connected to the outer wall of the outlet pipe 25. The outer wall of the inlet pipe two 23 is fixedly connected to the outer wall of the chemical agent box 12. The outer wall of the outlet pipe two 26 is fixedly connected to the outer wall of the inlet oil pipe 34. The qualified oil separated by the waste oil dehydration and deironing unit 3 enters the outlet oil pipe 35. The separated water and separated solid slag are discharged externally. The treated waste oil has a water content < 1.5%, an iron ion content in the oil < 300 PPM, an oil content in the separated water < 300 PPM, and an oil content in the solid slag < 1.5%.

[0021] Working principle:

[0022] When in use, first transport the washing and demulsifying pretreatment unit 1, the waste oil solid-removing and deironing unit 2, and the waste oil dehydration and deironing unit 3 to the working site. Then connect the waste oil pipeline to the inlet pipeline 13 in the washing and demulsifying pretreatment unit 1 so that the waste oil can enter the washing and demulsifying pretreatment unit 1. Then connect the washing and demulsifying pretreatment unit 1 and the waste oil solid-removing and deironing unit 2 through a pipeline so that the waste oil treated by the washing and demulsifying pretreatment unit 1 enters the waste oil solid-removing and deironing unit 2. Transport the waste oil treated by the waste oil solid-removing and deironing unit 2 to the waste oil dehydration and deironing unit 3 through a pipeline, thereby completing the treatment of the waste oil and obtaining iron-containing waste oil.

[0023] The washing and demulsifying pretreatment unit 1 contains a two-stage high-temperature steam demulsifier composed of a heat preservation tank 11 and a chemical agent box 12. The liquid level gauge 14 in the chemical agent box 12 is used to display the liquid level in the chemical agent box 12, so as to fully wash and demulsify the iron-containing waste oil, and the iron-containing impurities flocculate into large particles at this stage.

[0024] When the iron-containing waste oil enters the waste oil solid-removing and deironing unit 2 through the inlet pipe two 23, there is a three-phase disc centrifuge 22 in the waste oil solid-removing and deironing unit 2. Through the high-speed rotation of the three-phase disc centrifuge 22, the demulsified iron-containing waste oil is separated. Here, 95% of the solid phase and 85% of the iron salt can be separated. The solid phase is externally transported through a screw conveyor. The liquid phase enters the fuel tank 27 through the outlet pipe two 26 respectively and is transported to the waste oil dehydration and deironing unit 3 through the pump outlet pipe 24. The water generated by the three-phase disc centrifuge 22 is discharged through the outlet pipe 25.

[0025] The waste oil pumped out by the liquid delivery pipe 24 of the pump enters the waste oil dehydration and deironing unit 3 through the oil inlet pipe 34. There is a horizontal centrifuge 32 in the waste oil dehydration and deironing unit 3. By the high-speed rotation of the horizontal centrifuge 32, the liquid phase separated by the three-phase disc centrifuge 22 can be separated again. Here, more than 95% of the water and more than 90% of the iron ions can be separated. The treated waste oil will be transported to the oil water tank 33 and discharged through the oil outlet pipe 35. The hot steam generated by the horizontal centrifuge 32 will be discharged through the hot steam exhaust pipe 31.

[0026] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention shall be implemented by conventional means in the art without special instructions and limitations.

Claims

1. An apparatus for removing iron and water from crude oil and waste oil, characterized in that Including: Washing and demulsification pretreatment unit (1); Oil sludge solid and iron removal unit (2), the outer wall of the oil sludge solid and iron removal unit (2) is fixedly connected to the outer wall of the washing and demulsification pretreatment unit (1) through a pipeline; Oil sludge dehydration and iron removal unit (3), the outer wall of the oil sludge dehydration and iron removal unit (3) is fixedly connected to the outer wall of the oil sludge solid and iron removal unit (2) through a pipeline; The oil sludge dehydration and iron removal unit (3) includes a hot steam exhaust pipe (31), a horizontal centrifuge (32) is fixedly connected to the outer wall of the hot steam exhaust pipe (31), an oil inlet pipe (34) is fixedly connected to the outer wall of the horizontal centrifuge (32), an oil-water tank (33) is fixedly connected to the bottom of the horizontal centrifuge (32), and an oil outlet pipe (35) is fixedly connected to the inner wall of the oil-water tank (33).

2. The crude oil and waste oil deironing and dehydration device according to claim 1, wherein: The washing and demulsification pretreatment unit (1) includes a heat preservation tank (11), there are two groups of the heat preservation tanks (11), and a chemical agent box body (12) is connected to the outer wall of each group of the heat preservation tanks (11) through a pipeline, and a liquid inlet pipeline (13) is fixedly connected to the outer wall of the heat preservation tank (11).

3. The crude oil and oily waste deironing and dehydration device according to claim 2, characterized in that: A liquid level gauge (14) is fixedly connected to the inner wall of the chemical agent box body (12).

4. The crude oil and dirty oil deironing and dehydration device according to claim 1, wherein: The oil sludge solid and iron removal unit (2) includes a three-phase disc centrifuge (22), there are two groups of the three-phase disc centrifuges (22), and a second liquid outlet pipe (26) is fixedly connected to the outer wall of each group of the three-phase disc centrifuges (22), a second liquid inlet pipe (23) is fixedly connected to the outer wall of the three-phase disc centrifuge (22), a water outlet pipe (25) is fixedly connected to the outer wall of the three-phase disc centrifuge (22), and an oil tank (27) is fixedly connected to the bottom of the three-phase disc centrifuge (22).

5. The crude oil and waste oil deironing and dehydration device according to claim 4, characterized in that: A second liquid outlet pipe (26) is fixedly connected to the outer wall of the three-phase disc centrifuge (22), and a pump-out liquid pipe (24) is fixedly connected to the inner wall of the oil tank (27).

6. The crude oil and oily waste deironing and dehydration device according to claim 5, wherein: The outer wall of the pump-out liquid pipe (24) is fixedly connected to the inner wall of the oil tank (27), the inner wall of the oil tank (27) is fixedly connected to the outer wall of the second liquid inlet pipe (23), the inner wall of the oil tank (27) is fixedly connected to the outer wall of the water outlet pipe (25), the outer wall of the second liquid inlet pipe (23) is fixedly connected to the outer wall of the chemical agent box body (12), and the outer wall of the second liquid outlet pipe (26) is fixedly connected to the outer wall of the oil inlet pipe (34).

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