Oilfield wastewater waste heat comprehensive utilization device

Abstract

The waste heat comprehensive utilization device of oilfield wastewater includes a water tank, which is a columnar structure. The bottom of the water tank is fixedly connected to the upper end of the vertical pipe of the L-shaped pipe, the L-shaped pipe is connected to the inside of the water tank, a turbine is installed in the vertical pipe of the L-shaped pipe through a rotating shaft and a bearing, the top surface of the turbine is flush with the bottom surface of the inner wall of the water tank, one side of the water tank is fixedly connected to one end of the water inlet pipe, the water inlet pipe is connected to the inside of the water tank, a cover plate is movably installed on the top surface of the water tank, the bottom surface area of ​​the cover plate is not less than the top surface area of ​​the water tank, a liquid storage tank is fixedly installed on the top surface of the cover plate, the bottom surface of the liquid storage tank is fixedly connected to the upper end of the vertical pipe, the lower end of the vertical pipe passes through the cover plate, the vertical pipe is connected to the liquid storage tank and the inside of the water tank at the same time, and valves are fixedly installed on the periphery of the vertical pipe. The rotating turbine drives the turbine generator to work to generate electricity, which can be supplied to the heat pump unit or other equipment for use, which is more energy-saving and environmentally friendly, and can reduce the use of conventional energy, and the sewage treatment cost can be further reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield sewage treatment, in particular to a device for comprehensively utilizing waste heat from oilfield sewage. Background Art

[0002] As my country pays more and more attention to energy conservation and emission reduction policies, various oil fields have begun to effectively utilize oil field production wastewater, and collect residual heat energy in the wastewater through heat pump technology to improve energy utilization. At present, after the heat energy in the wastewater is transferred through heat pump technology, the temperature of the wastewater is reduced. In addition, since oilfield wastewater contains oil, the oil in the wastewater is very easy to adhere to the inner wall of the equipment after cooling, which leads to reduced wastewater discharge efficiency or even blockage. Summary of the invention

[0003] The invention provides a device for comprehensively utilizing waste heat of oilfield produced sewage, which is used to solve the defects in the prior art.

[0004] The present invention is achieved through the following technical solutions:

[0005] The invention discloses a device for comprehensively utilizing waste heat of oilfield produced wastewater, comprising a water tank, which is a columnar structure. The bottom surface of the water tank is fixedly connected to the upper end of a vertical pipe of an L-shaped pipe, the L-shaped pipe is communicated with the inside of the water tank, a turbine is installed in the vertical pipe of the L-shaped pipe through a rotating shaft and a bearing, the top surface of the turbine is flush with the bottom surface of the inner wall of the water tank, one side of the water tank is fixedly connected to one end of a water inlet pipe, the water inlet pipe is communicated with the inside of the water tank, a cover plate is movably installed on the top surface of the water tank, the bottom surface area of ​​the cover plate is not less than the top surface area of ​​the water tank, a liquid storage tank is fixedly installed on the top surface of the cover plate, the bottom surface of the liquid storage tank is fixedly connected to the upper end of the vertical pipe, the lower end of the vertical pipe passes through the cover plate, the vertical pipe is communicated with the liquid storage tank and the inside of the water tank respectively, and valves are fixedly installed on the periphery of the vertical pipe.

[0006] As described above, the comprehensive utilization device for waste heat of oilfield production wastewater has an opening on one side of the water trough, one end of the water trough is fixedly connected to one end of a guide plate, the guide plate is an arc-shaped structure with its convex surface facing the water inlet pipe, and the other end of the guide plate faces the inner wall of the water trough, and the water trough and the guide plate are an integrated structure.

[0007] In the above-mentioned device for comprehensive utilization of waste heat from oilfield production wastewater, the bottom of the liquid storage tank is a conical structure.

[0008] In the above-mentioned device for comprehensive utilization of waste heat from oilfield production wastewater, a screw hole communicating with the interior of the liquid storage tank is provided on the top surface, a screw tube threadedly matched with the screw hole passes through the screw hole, the upper end of the screw tube is fixedly connected to the bottom surface of a circular plate, and the bottom surface area of ​​the circular plate is larger than the top surface area of ​​the screw hole.

[0009] In the above-mentioned device for comprehensive utilization of waste heat from oilfield produced water, a plurality of anti-skid rubber strips are fixedly installed on the outer circumference of the circular plate.

[0010] In the above-mentioned oilfield wastewater waste heat comprehensive utilization device, a plurality of clamping plates are fixedly installed on the bottom surface of the cover plate, the clamping plates are all arc-shaped structures, and the convex surfaces of the clamping plates are in clearance with the inner wall of the water tank.

[0011] In the above-mentioned device for comprehensive utilization of waste heat from oilfield produced water, a plurality of handles are fixedly mounted on the top surface of the cover plate.

[0012] The oilfield wastewater waste heat comprehensive utilization device as described above also includes a frame and a condenser arranged on one side of the frame; a compressor is arranged on one side of the condenser, and a water storage tank is arranged on one side of the compressor; a clean water circulation pump is arranged on the frame, and a heating circulation pump is arranged on one side of the clean water circulation pump; a heat pump main unit is arranged on one side of the heating circulation pump, and an electric control box is arranged on one side of the heat pump main unit; a digital display is arranged on the electric control box; a plurality of conduits are arranged in the frame; the horizontal pipe of the L-shaped pipe is fixedly connected to the water inlet of the clean water circulation pump, and the water inlet pipe is connected to the sewage source.

[0013] The advantages of the present invention are: the present invention is installed in front of the heat pump unit, and the water tank can be stably placed by using the structure in the prior art. The liquid storage tank contains scale inhibitor, and the flow rate of the scale inhibitor in the vertical pipe is adjusted by a valve. The scale inhibitor in the liquid storage tank enters the water tank through the vertical pipe under the action of gravity, and the sewage enters the water tank through the water inlet pipe. The sewage will be mixed with the scale inhibitor, and the sewage flows along the inner wall of the water tank to form a vortex, which can enhance the mixing effect of the sewage and the scale inhibitor. After the sewage mixed with the scale inhibitor enters the heat pump unit, the probability of the sewage forming scale in the heat pump unit can be greatly reduced, and the heat exchange efficiency can be improved. The utilization rate of the thermal energy of the sewage is further improved, and the sewage flowing in a vortex shape can drive the turbine to rotate. The rotating turbine can be connected to the input shaft of the turbine generator to drive the turbine generator to work and generate electricity through the rotating turbine. The electricity can be supplied to the heat pump unit or other equipment for use, which is more energy-saving and environmentally friendly, and can reduce the use of conventional energy, and the sewage treatment cost can be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 An enlarged view of the A direction. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The comprehensive utilization device of waste heat from oilfield wastewater, as shown in the figure, comprises a water tank 1, which is a columnar structure. The bottom surface of the water tank 1 is fixedly connected to the upper end of the vertical pipe of the L-shaped pipe 2, the L-shaped pipe 2 is communicated with the inside of the water tank 1, and a turbine 3 is installed in the vertical pipe of the L-shaped pipe 2 through a rotating shaft and a bearing. The inner wall of the L-shaped pipe 2 is fixedly connected to the end of the herringbone bracket, the center of the top surface of the herringbone bracket is connected to the lower end of the rotating shaft through a waterproof bearing, and the turbine 3 is fixedly installed on the outer periphery of the upper end of the rotating shaft; when the turbine 3 is connected to the input shaft of the turbine generator, the upper end of the rotating shaft is connected through a coupling. The input shaft of the turbine generator is connected, and the top surface of the turbine 3 is flush with the bottom surface of the inner wall of the water tank 1. One side of the water tank 1 is fixedly connected to one end of the water inlet pipe 4, and the water inlet pipe 4 is communicated with the inside of the water tank 1. A cover plate 5 is movably installed on the top surface of the water tank 1, and the bottom area of ​​the cover plate 5 is not less than the top area of ​​the water tank 1. A liquid storage tank 6 is fixedly installed on the top surface of the cover plate 5, and the bottom surface of the liquid storage tank 6 is fixedly connected to the upper end of a vertical pipe 7. The lower end of the vertical pipe 7 passes through the cover plate 5. The vertical pipe 7 is communicated with the liquid storage tank 6 and the inside of the water tank 1 respectively, and valves are fixedly installed on the periphery of the vertical pipe 7. The present invention is installed in front of the heat pump unit, and the water tank 1 can be stably placed by using the structure in the prior art. The liquid storage tank 6 contains a scale inhibitor, and the flow rate of the scale inhibitor in the vertical pipe 7 is adjusted by a valve. The scale inhibitor in the liquid storage tank 6 enters the water tank 1 through the vertical pipe 7 under the action of gravity, and the sewage enters the water tank 1 through the water inlet pipe 4. The sewage will be mixed with the scale inhibitor, and the sewage flows along the inner wall of the water tank 1 to form a vortex, which can enhance the mixing effect of the sewage and the scale inhibitor. After the sewage mixed with the scale inhibitor enters the heat pump unit, the probability of the sewage forming scale in the heat pump unit can be greatly reduced, and the heat exchange efficiency can also be improved. The utilization rate of the thermal energy of the sewage is further improved, and the sewage flowing in a vortex shape can drive the turbine 3 to rotate. The rotating turbine 3 can be connected to the input shaft of the turbine generator to drive the turbine generator to work through the rotating turbine 3 to generate electrical energy. The electrical energy can be supplied to the heat pump unit or other equipment for use, which is more energy-saving and environmentally friendly, and can reduce the use of conventional energy, and the sewage treatment cost can be further reduced.

[0018] Specifically, if Figure 2As shown, one side of the water tank 1 described in this embodiment is open, one end of the water tank 1 is fixedly connected to one end of a guide plate 8, the guide plate 8 is an arc-shaped structure and its convex surface faces the water inlet pipe 4, the other end of the guide plate 8 faces the inner wall of the water tank 1, and the water tank 1 and the guide plate 8 are an integral structure. This structure enables water to flow along the guide plate 8 to the inner wall of the water tank 1, and then the sewage flows along the inner wall of the water tank 1, which is more conducive to the formation of a vortex in the water tank 1, and this structure reduces the area of ​​the outlet end of the water inlet pipe 4. Under the same water pressure conditions, the flow rate of the water in the water inlet pipe 4 when entering the water tank 1 becomes larger, which is more conducive to the rapid rotation of the turbine 3.

[0019] Specifically, Figure 1 As shown, the bottom of the liquid storage tank 6 described in this embodiment is a conical structure. When the antiscalant in the liquid storage tank 6 is less, the antiscalant will accumulate in the conical structure under the action of gravity, so as to flow into the water tank 1 through the vertical pipe 7.

[0020] Further, such as Figure 1 As shown, the top surface of the liquid storage tank 6 described in this embodiment is provided with a screw hole 9 communicating with the inside thereof, a screw tube 10 threadedly matched with the screw hole 9 passes through the screw hole 9, and the upper end of the screw tube 10 is fixedly connected to the bottom surface of the circular plate 11, and the bottom surface area of ​​the circular plate 11 is larger than the top surface area of ​​the screw hole 9. The staff can drive the screw tube 10 to rotate by rotating the circular plate 11 by hand, and screw the screw tube 10 out of the screw hole 9 to add the scale inhibitor into the liquid storage tank 6. After the addition is completed, the screw tube 10 is screwed into the screw hole 9 to prevent foreign debris from entering the liquid storage tank 6, which has very high practicality.

[0021] Furthermore, Figure 1 As shown, a plurality of anti-skid rubber strips are fixedly installed on the outer circumference of the circular plate 11 in this embodiment. This structure can increase the friction between the hand and the circular plate 11, thereby playing an anti-skid role when people rotate the circular plate 11.

[0022] Furthermore, Figure 1 As shown, the bottom surface of the cover plate 5 described in this embodiment is fixedly mounted with several clamping plates 12, all of which are arc-shaped structures, and the convex surfaces of the clamping plates 12 are all in clearance with the inner wall of the water tank 1. The bottom surface of the cover plate 5 is in contact with the top surface of the water tank 1. When installing the cover plate 5, the cover plate 5 can be directly placed on the top surface of the water tank 1 and the clamping plates 12 are located inside the water tank 1. The clamping plates 12 can prevent the cover plate 5 from moving along the X and Y directions, thereby ensuring that the cover plate 5 isolates the water tank 1 from the outside world, so as to prevent the cover plate 5 from moving under special circumstances and causing foreign debris to enter the water tank 1, and have higher reliability in actual use.

[0023] Furthermore, Figure 1As shown, the top surface of the cover plate 5 described in this embodiment is fixedly mounted with a plurality of handles 13. This structure can provide people with a point for applying force, and people can lift the cover plate 5 by holding the handle 13, so as to facilitate maintenance or replacement of the turbine 3.

[0024] Furthermore, in order to reduce the structure of waste heat utilization and reduce the occupied space, this embodiment also includes a skeleton and a condenser arranged on one side of the skeleton; a compressor is arranged on one side of the condenser, and a water storage tank is arranged on one side of the compressor; a clean water circulation pump is arranged on the skeleton, and a heating circulation pump is arranged on one side of the clean water circulation pump; a heat pump host is arranged on one side of the heating circulation pump, and an electric control box is arranged on one side of the heat pump host; a digital display is arranged on the electric control box; a plurality of conduits are arranged in the skeleton; the transverse pipe of the L-shaped pipe 2 is fixedly connected to the water inlet of the clean water circulation pump, and the water inlet pipe 4 is connected to the sewage source. This structure adopts heat pump technology, and on the basis of the existing heat pump unit, introduces important components of the comprehensive utilization process of waste heat from oil production, such as clean water circulation pump, water storage tank, a large number of conduits, heating circulation pump, etc., simplifies the inefficient secondary components in the existing heat pump unit, and effectively integrates the newly introduced parts together to supply domestic heating and oil field production oil; it not only meets environmental protection requirements, but also has huge economic benefits.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Comprehensive utilization device for waste heat from oilfield wastewater, characterized by: The water tank (1) comprises a water tank (1), the water tank (1) is a columnar structure, the bottom surface of the water tank (1) is fixedly connected to the upper end of the vertical pipe of the L-shaped pipe (2), the L-shaped pipe (2) is communicated with the inside of the water tank (1), a turbine (3) is installed in the vertical pipe of the L-shaped pipe (2) via a rotating shaft and a bearing, the top surface of the turbine (3) is flush with the bottom surface of the inner wall of the water tank (1), one side of the water tank (1) is fixedly connected to one end of a water inlet pipe (4), and the water inlet pipe (4) is communicated with the inside of the water tank (1). The top surface of the water tank (1) is movably mounted with a cover plate (5), the bottom surface area of ​​the cover plate (5) is not less than the top surface area of ​​the water tank (1), the top surface of the cover plate (5) is fixedly mounted with a liquid storage tank (6), the bottom surface of the liquid storage tank (6) is fixedly connected to the upper end of a vertical pipe (7), the lower end of the vertical pipe (7) passes through the cover plate (5), the vertical pipe (7) is respectively connected to the liquid storage tank (6) and the inside of the water tank (1), and valves are respectively fixedly mounted on the outer periphery of the vertical pipe (7); The liquid storage tank (6) contains a scale inhibitor; One side of the water trough (1) is open, one end of the water trough (1) is fixedly connected to one end of a guide plate (8), the guide plate (8) is an arc-shaped structure with its convex surface facing the water inlet pipe (4), the other end of the guide plate (8) faces the inner wall of the water trough (1), and the water trough (1) and the guide plate (8) are an integral structure; It also includes a frame and a condenser arranged on one side of the frame; a compressor is arranged on one side of the condenser, and a water storage tank is arranged on one side of the compressor; a clean water circulation pump is arranged on the frame, and a heating circulation pump is arranged on one side of the clean water circulation pump; a heat pump host is arranged on one side of the heating circulation pump, and an electric control box is arranged on one side of the heat pump host; a digital display is arranged on the electric control box; a plurality of conduits are arranged in the frame; the horizontal pipe of the L-shaped pipe (2) is fixedly connected to the water inlet of the clean water circulation pump, and the water inlet pipe (4) is connected to a sewage source.

2. The device for comprehensive utilization of waste heat from oilfield wastewater according to claim 1 is characterized in that: The bottom of the liquid storage tank (6) is a conical structure.

3. The device for comprehensive utilization of waste heat from oilfield wastewater according to claim 1 is characterized in that: The top surface of the liquid storage tank (6) is provided with a screw hole (9) communicating with the inside thereof, a screw tube (10) threadedly engaged with the screw hole (9) passes through the screw hole (9), the upper end of the screw tube (10) is fixedly connected to the bottom surface of the circular plate (11), and the bottom surface area of ​​the circular plate (11) is larger than the top surface area of ​​the screw hole (9).

4. The device for comprehensive utilization of waste heat from oilfield wastewater according to claim 3 is characterized in that: A plurality of anti-slip rubber strips are fixedly mounted on the outer circumference of the circular plate (11).

5. The device for comprehensive utilization of waste heat from oilfield wastewater according to claim 1 is characterized in that: A plurality of clamping plates (12) are fixedly mounted on the bottom surface of the cover plate (5); the clamping plates (12) are all arc-shaped structures, and the convex surfaces of the clamping plates (12) are all gap-matched with the inner wall of the water tank (1).

6. The device for comprehensive utilization of waste heat from oilfield wastewater according to claim 5 is characterized in that: A plurality of handles (13) are fixedly mounted on the top surface of the cover plate (5).

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