Energy-saving solvent oil tank

Abstract

The utility model belongs to the technical field of rubber production, and particularly relates to an energy-saving solvent oil tank which comprises a tank body, an input pipe is arranged at the top of the tank body, an output pipe is arranged at the bottom of the tank body, an output valve is arranged on the output pipe, a water cutting pipe is arranged at the bottom of the tank body, and a water cutting valve is arranged on the water cutting pipe. The tank body is provided with a sleeve expansion joint in a penetrating manner from the bottom, the sleeve expansion joint comprises a fixed end fixedly connected with the tank body and an expansion end extending into the tank body, a plurality of hydraulic rods are arranged between the tank body and the expansion end, and a sealing piece covering the outer ring of the expansion end and the hydraulic rods is arranged; a plug-in type oil-water interface instrument is arranged in the tank body. Compared with the prior art, the energy-saving solvent oil tank adapts to oil-water interface change by intelligently adjusting the height of the output pipe, the purity and efficiency of solvent oil recovery are effectively improved, and resource waste is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of rubber production, and particularly relates to an energy-saving solvent oil tank. Background Art

[0002] In the coagulation process of the rubber post-section, after the rubber solution enters the coagulation kettle, a small amount of unreacted butadiene and a large amount of solvent oil, as key by-products, need to go through a series of complex treatment steps to achieve effective recovery and reuse. In this process, the oil and gas condenser condenses the mixture containing oil and gas, and then the mixture enters the oil-water separation tank for preliminary separation. However, the existing solvent oil recovery system has significant energy efficiency and resource waste problems. In particular, the design defects of the solvent oil tank directly affect the purity and efficiency of solvent oil recovery, and thus have an adverse impact on the subsequent polymerization reaction.

[0003] Specifically, the traditional solvent oil tank adopts a non-partition design, and the output pipe is directly arranged at the bottom of the tank. When the solvent oil is sent out, if there is a small amount of unseparated water in the tank, it will be sent to the tank area together with the solvent oil, resulting in fluctuations in the water value of the refined solvent and affecting the stability of the polymerization reaction and the product quality. To solve this problem, the technical personnel of our company increased the height of the discharge port of the output pipe to 40CM inside, and achieved more thorough oil-water separation through gravity, reducing the free water content in the solvent sent to the tank area by coagulation, and the effect was obvious.

[0004] However, in actual operation, this method still has significant limitations. When the oil-water interface drops significantly below the height of the discharge port due to changes in operating conditions (such as fluctuations in feed volume, temperature differences, etc.), a large amount of solvent oil cannot cross the discharge port and stays in the tank, but is discharged through the original drain pipe for draining water, forming an oil-water mixture. This phenomenon not only causes solvent oil loss and increases the recovery cost, but also consumes additional resources due to the need for re-separation and treatment of the mixture, resulting in a decrease in the energy efficiency of the recovery process and resource waste.

[0005] Therefore, in view of the above problems existing in the existing solvent oil recovery system, it is particularly important to design an energy-saving solvent oil mixing tank that can adjust the height of the discharge port according to the dynamic changes of the oil-water interface. Summary of the Invention

[0006] In view of the deficiencies of the above-mentioned prior art, the utility model provides an energy-saving solvent oil tank to solve the above problems.

[0007] An energy-saving solvent oil tank of the utility model comprises a tank body. An input pipe is arranged at the top of the tank body, and an output pipe is arranged at the bottom of the tank body. An output valve is arranged on the output pipe. A water cutting pipe is arranged at the bottom of the tank body, and a water cutting valve is arranged on the water cutting pipe. A sleeve expansion joint penetrates through the bottom of the tank body. The sleeve expansion joint comprises a fixed end fixedly connected with the tank body and a telescopic end extending into the tank body. A plurality of hydraulic rods are arranged between the tank body and the telescopic end, and a sealing member covering the outer ring of the telescopic end and the hydraulic rods is arranged. An inserted oil-water interface detector is arranged in the tank body.

[0008] Further, the sealing member is a tetrafluoroethylene corrugated hose. The tetrafluoroethylene corrugated hose comprises a lower connecting ring, an upper connecting ring and a corrugated pipe. The lower connecting ring is connected with the inner wall of the tank body. The telescopic end of the sleeve expansion joint passes through the lower connecting ring and is connected with the upper connecting ring. Two ends of the corrugated pipe are respectively connected with the lower connecting ring and the upper connecting ring.

[0009] Further, through holes with threads are formed in the end face of the upper connecting ring. A sealing joint is screwed at the top end of the through hole with threads. The sealing joint is connected with a pipeline extending out of the tank body. An oil pipe connecting the hydraulic rods is arranged in the pipeline.

[0010] Further, the end of the water cutting pipe is connected with a water storage tank. A drain pipe is arranged on the water storage tank, and a drain valve is arranged on the drain pipe.

[0011] Further, a liquid-phase pump is arranged on the output pipe.

[0012] Further, the oil-water interface detector is a double-float interface detector.

[0013] Further, a maintenance opening is arranged on the tank body, and a sealing hatch door adapted to the maintenance opening is arranged on the maintenance opening.

[0014] Further, the input pipe, the output pipe, the water cutting pipe and the drain pipe are all 304 stainless steel pipes.

[0015] Compared with the prior art, the energy-saving solvent oil tank effectively improves the purity and efficiency of solvent oil recovery and reduces resource waste by intelligently adjusting the height of the output pipe to adapt to the change of the oil-water interface. At the same time, the use of corrosion-resistant materials and sealing design ensures the stability and safety during long-term use, reduces the maintenance cost, and significantly improves the production efficiency and economic benefits of the post-rubber section. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 is a schematic diagram of partial structures such as the sleeve expansion joint, the tetrafluoroethylene corrugated hose and the hydraulic rods.

[0018] In the figure: 1, tank body; 2, input pipe; 3, output pipe; 4, output valve; 5, water cut-off pipe; 6, water cut-off valve; 7, sleeve expansion joint; 8, fixed end; 9, expansion end; 10, hydraulic rod; 11, oil-water interface detector; 12, lower connection ring; 13, upper connection ring; 14, bellows; 15, threaded through hole; 16, sealed joint; 17, water storage tank; 18, drain pipe; 19, drain valve; 20, liquid-phase pump; 21, sealed hatch door. Specific embodiments

[0019] For a better understanding of the present invention, the following will be combined with Figures 1 to 2 to explain in detail the embodiments of the present invention.

[0020] It should be noted that the "front, rear, left, right, up, down" directions described in the text are all based on the Figure 1 "front, rear, left, right, up, down" directions in it. In addition, to ensure the clear structure of the view, the size of the tank body in Figure 1 has been reduced.

[0021] An energy-saving solvent oil tank of the present invention includes a tank body 1, and the tank body 1 is made of corrosion-resistant materials to ensure the stability and safety of long-term use. An input pipe 2 is provided at the top of the tank body 1 for receiving the oil-water mixture from the oil-gas condenser. At the bottom, an output pipe 3 and a water cut-off pipe 5 are provided, which are used for discharging the separated solvent oil and water respectively.

[0022] To achieve dynamic adjustment of the height of the output pipe 3, a sleeve expansion joint 7 is penetrated through the bottom of the tank body 1 in the present invention. The sleeve expansion joint 7 includes a fixed end 8 fixedly connected to the tank body 1 and an expansion end 9 extending into the tank body 1. A number of hydraulic rods 10 are installed between the fixed end 8 and the expansion end 9, and the telescopic lengths of these hydraulic rods 10 are precisely controlled by a control system (not shown in the figure), thereby driving the expansion end 9 to move up and down. To ensure the sealing performance, a fully covered seal is provided around the expansion end 9 and the hydraulic rods 10. The seal is specifically a tetrafluoroethylene bellows, which includes a lower connection ring 12, an upper connection ring 13 and a bellows 14. The lower connection ring 12 is connected to the inner wall of the tank body 1, the expansion end 9 passes through the lower connection ring 12 and then is connected to the upper connection ring 13, and the two ends of the bellows 14 are respectively connected to the lower connection ring 12 and the upper connection ring 13, preventing the solvent oil from leaking and contacting the expansion end 9 and the hydraulic rods 10 through the tetrafluoroethylene bellows.

[0023] On the end face of the upper connecting ring 13, a through-threaded through-hole 15 is provided. A sealing joint 16 is screwed at the top of the threaded through-hole 15. The sealing joint 16 is connected to a wire tube extending out of the tank body 1. The wire tube is made of a flexible material and has a certain bending ability to adapt to the complex environmental changes inside and outside the tank body 1. Inside the wire tube, there is an oil tube for controlling the telescopic movement of the hydraulic rod 10. This oil tube is connected to a hydraulic control system (including a hydraulic oil pump). Through the oil tube, the hydraulic control system can inject or extract hydraulic oil into the hydraulic rod 10, thereby controlling the telescopic length of the hydraulic rod 10, and further driving the telescopic end 9 of the sleeve expansion joint 7 to move up and down. Besides being used for passing through the oil tube, the gap between the wire tube and the oil tube also serves as an air tube inside the connecting seal to prevent the bellows 14 from deforming significantly.

[0024] An inserted oil-water interface detector 11 is installed inside the tank body 1, preferably a double-float interface detector. This instrument can monitor the position of the oil-water interface and the oil level in real time, display the values, and at the same time transmit signals to the control system in the background. According to the received signals, the control system automatically adjusts the telescopic amount of the hydraulic rod 10, so that the discharge port of the output pipe 3 always remains above the oil-water interface, ensuring that the solvent oil can be discharged smoothly while the water is retained below.

[0025] The end of the water cut-off pipe 5 is connected to a water storage tank 17 for collecting the discharged water. A drain pipe 18 is provided on the water storage tank 17, and a drain valve 19 is installed on the drain pipe 18 to facilitate the regular discharge of the collected water. In addition, a liquid-phase pump 20 is also installed on the output pipe 3 to enhance the discharge power of the solvent oil and ensure a stable flow rate during the height adjustment of the output pipe 3.

[0026] The input pipe 2, the output pipe 3, the water cut-off pipe 5, and the drain pipe 18 are all made of 304 stainless steel pipes to enhance corrosion resistance and extend service life. An inspection port is also provided on the tank body 1, and a matching sealed hatch 21 is installed on the inspection port to facilitate the daily maintenance and repair work.

[0027] The usage method and principle of the present utility model:

[0028] When using this device, first introduce the oil-water mixture into the tank body 1 through the input pipe 2. Since the specific gravity of oil is less than that of water and oil and water are immiscible, oil-water separation is achieved in the tank body 1. The position of the oil-water interface is monitored in real time by the oil-water interface detector 11, and the signal is transmitted to the control system. The control system automatically adjusts the telescopic amount of the hydraulic rod 10 according to the height change of the oil-water interface, driving the telescopic end 9 of the sleeve expansion joint 7 to move up and down, so as to adjust the height of the discharge port of the output pipe 3. When the oil-water interface rises, the discharge port moves up accordingly to ensure that the solvent oil can be discharged smoothly and no water is mixed in due to the rising of the interface; when the oil-water interface drops, the discharge port moves down accordingly to prevent water from being mixed into the solvent oil. Finally, the separated solvent oil is discharged through the output pipe 3, while the water enters the water storage tank 17 through the water cut-off pipe 5 and is discharged regularly through the drain pipe 18. During the whole process, the control system continuously monitors and adjusts to ensure the high efficiency and purity of the solvent oil recovery.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0030] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy-saving solvent oil tank, comprising a tank body (1), wherein the top of the tank body (1) is provided with an input pipe (2), the bottom of the tank body (1) is provided with an output pipe (3), and the output pipe (3) is provided with an output valve (4), characterized in that: A water cut-off pipe (5) is provided at the bottom of the tank body (1), and a water cut-off valve (6) is provided on the water cut-off pipe (5). A sleeve telescopic joint (7) is passed through the bottom of the tank body (1), and the sleeve telescopic joint (7) includes a fixed end (8) fixedly connected to the tank body (1), and a telescopic end (9) extending into the tank body (1). A plurality of hydraulic rods (10) are provided between the tank body (1) and the telescopic end (9), and a sealing member covering the outer ring of the telescopic end (9) and the hydraulic rod (10) is provided; an inserted oil-water interface meter (11) is provided in the tank body (1).

2. An energy-saving solvent oil tank as claimed in claim 1, characterized in that: The sealing element is a polytetrafluoroethylene corrugated hose, which comprises a lower connecting ring (12), an upper connecting ring (13) and a bellows (14). The lower connecting ring (12) is connected to the inner wall of the tank body (1). The telescopic end (9) of the sleeve telescopic joint (7) passes through the lower connecting ring (12) and is connected to the upper connecting ring (13). The two ends of the bellows (14) are respectively connected to the lower connecting ring (12) and the upper connecting ring (13).

3. An energy-saving solvent oil tank as claimed in claim 2, characterized in that: A threaded through hole (15) is provided on the end surface of the upper connecting ring (13), a sealing joint (16) is threadedly connected to the top end of the threaded through hole (15), the sealing joint (16) is connected to a wire pipe extending out of the tank body (1), and an oil pipe connected to the hydraulic rod (10) is arranged inside the wire pipe.

4. An energy-saving solvent oil tank as claimed in claim 1, characterized in that: The end of the water cut-off pipe (5) is connected to a water storage tank (17), a drainage pipe (18) is provided on the water storage tank (17), and a drainage valve (19) is provided on the drainage pipe (18).

5. The energy-saving solvent oil tank according to claim 1, characterized in that: The output pipe (3) is provided with a liquid phase pump (20).

6. An energy-saving solvent oil tank as claimed in claim 1, characterized in that: The oil-water interface meter (11) is a double-float interface meter.

7. An energy-saving solvent oil tank as claimed in claim 1, characterized in that: The tank body (1) is provided with an inspection port, and the inspection port is provided with a matching sealed hatch (21).

8. The energy-saving solvent oil tank according to claim 1, characterized in that: The input pipe (2), output pipe (3), water cut pipe (5) and drainage pipe (18) are all 304 stainless steel pipes.

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