High-pressure methanol energy recovery device

Abstract

The utility model relates to the technical field of methanol energy recovery, in particular to a high-pressure methanol energy recovery device which comprises a methanol separation tank, a discharge end of the methanol separation tank is communicated with a methanol filter, and a discharge end of the methanol filter is respectively communicated with a hydraulic turbine power generation device and a pressure reducing valve. One end of the hydraulic turbine power generation device is communicated with a pre-rectification system, the hydraulic turbine power generation device converts recycled energy into electric energy and then conveys the electric energy to the electric power system, the output end of the pressure reducing valve is communicated with the pre-rectification system, a filter element is inserted into the top face of the methanol filter, and the lower end of the methanol filter is communicated with an air inlet pipe. Effective recycling of high-pressure methanol energy is achieved, production interruption caused by faults of a hydraulic turbine power generation device is avoided, the backwashing assembly removes impurities accumulated on the surface of the filter element from the filter element through high-pressure nitrogen, the filtering performance of the filter element is conveniently and rapidly recovered, and the running stability and reliability of the methanol filter are improved.

Description

Technical Field

[0001] This utility model relates to the field of methanol energy recovery technology, and in particular to a high-pressure methanol energy recovery device. Background Technology

[0002] Methanol, as a basic chemical raw material, plays an important role in the energy and chemical industries. In the current coal-to-methanol process, high-pressure crude methanol (pressure > 5MPa) is directly depressurized by a pressure reducing valve and then enters the expansion tank. The large amount of pressure energy contained in it is not effectively recovered, resulting in energy waste. In the traditional process, the pressure reducing valve is only used as a pressure regulating device and cannot realize energy recovery, resulting in significant energy loss.

[0003] A search revealed Chinese patent CN103373898B, which provides a methanol synthesis process and a methanol synthesis system. The system recovers the pressure energy mentioned above using a hydraulic turbine and uses the mechanical energy converted from the hydraulic turbine as a driving force to drive a water pump, motor, or generator, thereby effectively utilizing the pressure energy.

[0004] However, during use, it was found that high-pressure methanol contains various impurities such as catalyst particles, metal scraps, and rust. These impurities can affect subsequent equipment and processes. Long-term accumulation of impurities leads to a decrease in filtration efficiency, which in turn affects product quality and production efficiency. Replacing the filter element is also quite cumbersome, affecting the continuity and efficiency of production. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a high-pressure methanol energy recovery device, which realizes the effective recovery and utilization of high-pressure methanol energy, avoids production interruptions caused by hydraulic turbine power generation device failures, and uses high-pressure nitrogen gas to remove impurities accumulated on the filter element surface, which facilitates and quickly restores the filter element's filtration performance, thereby improving the operational stability and reliability of the methanol filter.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-pressure methanol energy recovery device, including a methanol separator, the outlet end of the methanol separator is connected to a methanol filter, the outlet end of the methanol filter is connected to a hydraulic turbine power generation device and a pressure reducing valve respectively, one end of the hydraulic turbine power generation device is connected to a pre-distillation system, the hydraulic turbine power generation device converts the recovered energy into electrical energy and then transmits it to the power system, and the output end of the pressure reducing valve is connected to the pre-distillation system;

[0007] A filter element is inserted into the top surface of the methanol filter. An air inlet pipe is connected to the lower end of the methanol filter. A liquid inlet pipe with a valve is connected to the lower side wall of the methanol filter. A liquid outlet pipe with a valve is connected to the upper outer wall of the methanol filter. A drain pipe is provided at the lower end of the liquid outlet pipe. A tube sheet is installed inside the methanol filter. A backwashing assembly is provided at the lower end of the tube sheet. The backwashing assembly includes an annular pipe, which is connected to the air inlet pipe.

[0008] The methanol filter is provided with a quick-release assembly on its top surface. The quick-release assembly includes a positioning sleeve. The bottom surface of the positioning sleeve is fixedly connected to the top surface of the methanol filter. An installation ring is inserted into the upper end of the positioning sleeve. The installation ring is fixedly connected to the outer peripheral wall of the upper end of the filter element.

[0009] Preferably, the bottom surface of the methanol filter is inclined, and an air pump is mounted on the outer wall of the methanol filter via a mounting base. The output end of the air pump is connected to the air inlet pipe, and multiple filter elements and quick-release assemblies are provided.

[0010] The above technical solution allows impurities to be quickly discharged from the drain pipe to the outside through the inclined bottom surface of the methanol filter, reducing the risk of sedimentation at the bottom of the methanol filter.

[0011] Preferably, the backwashing assembly includes a diversion pipe, the lower end of which is connected to the upper end of the annular pipe, the diversion pipe passes through the tube sheet, and the upper end of the diversion pipe is connected to the lower end of the filter element.

[0012] Through the above technical solution, the air pump compresses the external nitrogen gas and draws it into the air inlet pipe, then into the annular pipe and evenly distributes it to each branch pipe, so that the nitrogen gas is sprayed from the inside of the filter element to the outside, stripping away impurities from the outer wall of the filter element.

[0013] Preferably, the quick-release assembly includes two insert blocks, and the positioning sleeve and the mounting ring are respectively provided with multiple insertion holes, and the insert blocks are inserted into the insertion holes.

[0014] Preferably, an arc block is fixed between the two insert blocks, and a pull ring is fixed on the outer wall of the arc block.

[0015] With the above technical solution, pulling the pull ring outward causes the pull ring to drive the insert block to disengage from the insertion hole of the positioning sleeve via the arc block, which facilitates the installation and removal of the insert block.

[0016] Preferably, the positioning sleeve has two limiting protrusions fixed in a symmetrical structure inside, the mounting ring has two limiting grooves on its outer wall, the inner wall of the limiting protrusions and the outer wall of the limiting grooves are engaged, and the top surface of the mounting ring has two levers fixed in a symmetrical structure.

[0017] The above technical solution ensures that the mounting ring and positioning sleeve are circumferentially fixed, preventing rotation and ensuring accurate filter element installation.

[0018] Preferably, the outer wall of the positioning sleeve is fixed with two elastic clips, and the outer wall of the insertion block is provided with two slots, and the elastic clips engage with the slots.

[0019] The above technical solution achieves axial fixation of the mounting ring, preventing the filter element from falling off and further improving the installation stability of the filter element.

[0020] The beneficial effects of this utility model are:

[0021] 1. After high-pressure crude methanol enters the methanol filter from the methanol separator to filter impurities, a portion is converted from pressure energy into electrical energy and transmitted to the power system via a hydraulic turbine generator. The other portion, in the event of a unit failure, is depressurized by a pressure reducing valve and enters the pre-distillation system to achieve energy recovery and utilization, ensuring continuous production and improving system stability and reliability. When backwashing is required, high-pressure nitrogen is supplied to the annular pipe through the air inlet pipe to backwash the filter element from the inside. Impurities are discharged through the drain pipe, reducing the impact of impurities on subsequent equipment and processes, ensuring product quality and production efficiency, quickly removing impurities from the filter element surface, restoring filtration performance, extending filter element lifespan, and improving the operational stability and reliability of the methanol filter.

[0022] 2. During backwashing, the air pump pressure meets the backwashing requirements. The air pump compresses external nitrogen and draws it into the air inlet pipe, then into the annular pipe and evenly distributes it to each branch pipe, causing the nitrogen to be sprayed from the inside of the filter element to the outside, stripping impurities from the outer wall of the filter element. The nitrogen enters the interior of each filter element through the branch pipe, achieving more accurate backwashing and avoiding airflow interference between multiple filter elements. The inclined bottom surface of the methanol filter facilitates the rapid discharge of impurities from the drain pipe to the outside, reducing the risk of sedimentation at the bottom of the methanol filter.

[0023] 3. When installing the filter element into the methanol filter, align the installation ring with the positioning sleeve and press down to insert the installation ring into the positioning sleeve. The limiting protrusion and the limiting groove should engage to ensure that the installation ring and the positioning sleeve are circumferentially fixed and prevent rotation. This ensures that the filter element is installed in an accurate position and avoids leakage or reduced filtration efficiency due to misalignment. Then, insert the insert block into the insertion hole so that the elastic clip engages with the slot near the arc block to fix the insert block. This completes the axial fixation of the installation ring, preventing the filter element from falling off and further improving the installation stability of the filter element. It also prevents the filter element from loosening due to high-pressure methanol impact.

[0024] 4. During disassembly, pull the pull ring outward. The pull ring, through the arc block, causes the insert block to disengage from the insertion hole of the positioning sleeve. The elastic clip separates from the slot on the side closer to the arc block until the elastic clip engages with the slot on the side farther from the arc block. Then, stop the movement of the pull ring and release the axial lock. Pull the mounting ring upward using the lever to separate the limiting groove from the limiting protrusion. Lift it upward to remove the filter element. This facilitates quick replacement of the filter element and improves the efficiency of filter element replacement. Attached Figure Description

[0025] Figure 1 This is a flowchart illustrating the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the methanol filter structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the internal structure of the methanol filter of this utility model;

[0028] Figure 4 This is a schematic diagram of the quick-release component structure of this utility model;

[0029] Figure 5 This is a schematic diagram of the mounting ring structure assembly of this utility model.

[0030] In the diagram: 1. Methanol separator; 2. Methanol filter; 3. Hydraulic turbine generator; 4. Pressure reducing valve; 5. Pre-distillation system; 6. Power system; 7. Quick-release assembly; 701. Positioning sleeve; 702. Mounting ring; 703. Insert block; 704. Insertion hole; 705. Arc block; 706. Pull ring; 707. Limiting protrusion; 708. Limiting groove; 709. Pulling block; 710. Elastic clamp; 711. Slot; 8. Filter element; 9. Air inlet pipe; 10. Liquid inlet pipe; 11. Liquid outlet pipe; 12. Sewage pipe; 13. Tube sheet; 14. Backwash assembly; 1401. Annular pipe; 1402. Diverter pipe; 15. Air pump. Detailed Implementation

[0031] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] like Figure 1-4As shown, this embodiment provides a high-pressure methanol energy recovery device, including a methanol separator 1. The outlet end of the methanol separator 1 is connected to a methanol filter 2. The outlet end of the methanol filter 2 is connected to a hydraulic turbine power generation device 3 and a pressure reducing valve 4. One end of the hydraulic turbine power generation device 3 is connected to a pre-distillation system 5. The hydraulic turbine power generation device 3 converts the recovered energy into electrical energy and then transmits it to the power system 6. The output end of the pressure reducing valve 4 is connected to the pre-distillation system 5.

[0034] A filter element 8 is inserted into the top surface of the methanol filter 2. An air inlet pipe 9 is connected to the lower end of the methanol filter 2. A liquid inlet pipe 10 with a valve is connected to the lower side wall of the methanol filter 2. A liquid outlet pipe 11 with a valve is connected to the upper outer wall of the methanol filter 2. A drain pipe 12 is provided at the lower end of the liquid outlet pipe 11. A tube sheet 13 is installed inside the methanol filter 2. A backwashing assembly 14 is provided at the lower end of the tube sheet 13. The backwashing assembly 14 includes an annular pipe 1401, which is connected to the air inlet pipe 9.

[0035] The top surface of the methanol filter 2 is provided with a quick-release assembly 7, which includes a positioning sleeve 701. The bottom surface of the positioning sleeve 701 is fixedly connected to the top surface of the methanol filter 2. An installation ring 702 is inserted into the upper end of the positioning sleeve 701. The interior of the installation ring 702 is fixedly connected to the upper outer peripheral wall of the filter element 8.

[0036] The methanol filter 2 has an inclined bottom surface. An air pump 15 is installed on the outer wall of the methanol filter 2 via a mounting base. The output end of the air pump 15 is connected to the air inlet pipe 9. Multiple filter elements 8 and quick-release components 7 are provided. The inclined bottom surface of the methanol filter 2 facilitates the rapid discharge of impurities from the drain pipe 12 to the outside, reducing the risk of sedimentation at the bottom of the methanol filter 2.

[0037] The backwashing assembly 14 includes a diversion pipe 1402, the lower end of which is connected to the upper end of the annular pipe 1401. The diversion pipe 1402 passes through the tube sheet 13 and the upper end of the diversion pipe 1402 is connected to the lower end of the filter element 8. The air pump 15 compresses the external nitrogen gas and draws it into the air inlet pipe 9, then enters the annular pipe 1401 and distributes it evenly to each diversion pipe 1402, so that the nitrogen gas is sprayed from the inside of the filter element 8 to the outside, stripping impurities from the outer wall of the filter element 8.

[0038] Working principle: After the high-pressure crude methanol comes out of the methanol separator 1, it enters the methanol filter 2 for filtration to remove impurities. After filtration, part of the methanol passes through the hydraulic turbine generator 3, using its pressure energy to drive the hydraulic turbine generator 3 to operate, converting energy into electrical energy and transmitting it to the power system 6; the other part, in special circumstances such as failure of the hydraulic turbine generator 3, is depressurized through the pressure reducing valve 4 and enters the pre-distillation system 5, realizing the effective recovery and utilization of high-pressure methanol energy, ensuring the continuity of production, avoiding production interruption due to failure of the hydraulic turbine generator 3, and improving the stability and reliability of the system.

[0039] High-pressure methanol enters the methanol filter 2 through the inlet pipe 10. After being filtered by the filter element 8, impurities are trapped on the surface of the filter element 8. The purified methanol flows out from the outlet pipe 11. When the filter element 8 needs to be backwashed, high-pressure nitrogen is supplied to the annular pipe 1401 through the air inlet pipe 9. The nitrogen blows outward from the inside of the filter element 8 in the opposite direction, blowing off the impurities attached to the outer wall of the filter element 8. The impurities move downward with the airflow and are discharged from the methanol filter 2 through the drain pipe 12. The methanol filter 2 reduces the impact of impurities on subsequent equipment and processes, ensuring product quality and production efficiency. The backwashing component 14 uses high-pressure nitrogen to remove impurities accumulated on the surface of the filter element 8, resulting in better backwashing effect, convenient and quick restoration of the filtration performance of the filter element 8, extension of the service life of the filter element 8, reduction of filtration efficiency decline caused by filter element 8 blockage, and improvement of the operational stability and reliability of the methanol filter 2.

[0040] When filter element 8 needs to be replaced, the quick-release assembly 7 can be used to easily and quickly remove filter element 8 from methanol filter 2, enabling rapid replacement of filter element 8 and improving maintenance efficiency.

[0041] During backwashing, the pressure of the air pump 15 meets the backwashing requirements. The air pump 15 compresses the external nitrogen and draws it into the air inlet pipe 9, then into the annular pipe 1401 and evenly distributes it to each branch pipe 1402, so that the nitrogen is sprayed from the inside of the filter element 8 to the outside, stripping the impurities on the outer wall of the filter element 8. The nitrogen enters the interior of each filter element 8 through the branch pipe 1402, achieving more accurate backwashing and avoiding airflow interference between multiple filter elements 8. The inclined bottom surface of the methanol filter 2 facilitates the rapid discharge of impurities from the drain pipe 12 to the outside, reducing the risk of sedimentation at the bottom of the methanol filter 2.

[0042] Example 2

[0043] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, based on Embodiment 1, the quick-release assembly 7 includes two insert blocks 703. The positioning sleeve 701 and the mounting ring 702 are respectively provided with multiple insertion holes 704. The insert blocks 703 are inserted into the insertion holes 704. An arc block 705 is fixed between the two insert blocks 703. A pull ring 706 is fixed on the outer wall of the arc block 705. Pulling the pull ring 706 outward causes the pull ring 706 to drive the insert block 703 out of the insertion hole 704 of the positioning sleeve 701 through the arc block 705, which facilitates the installation and removal of the insert block 703.

[0044] The positioning sleeve 701 has two symmetrically fixed limiting protrusions 707 inside, and the outer wall of the mounting ring 702 has two limiting grooves 708. The inner wall of the limiting protrusion 707 and the outer wall of the limiting groove 708 are engaged. The top surface of the mounting ring 702 has two symmetrically fixed levers 709. This ensures that the mounting ring 702 and the positioning sleeve 701 are circumferentially fixed to prevent rotation and ensure that the filter element 8 is installed in an accurate position.

[0045] The outer wall of the positioning sleeve 701 is fixed with two elastic clips 710, and the outer wall of the insertion block 703 is provided with two slots 711. The elastic clips 710 and the slots 711 engage with each other, thus completing the axial fixation of the installation ring 702, preventing the filter element 8 from falling off, and further improving the installation stability of the filter element 8.

[0046] When using the filter element 8, align the installation ring 702 with the positioning sleeve 701 and press down to insert the installation ring 702 into the positioning sleeve 701. The limiting protrusion 707 engages with the limiting groove 708 to ensure that the installation ring 702 and the positioning sleeve 701 are circumferentially fixed and prevent rotation. This ensures that the filter element 8 is installed in an accurate position and avoids leakage or a decrease in filtration efficiency due to misalignment.

[0047] Then, insert the insert 703 into the insertion hole 704, so that the elastic clip 710 engages with the slot 711 on the side near the arc block 705, and fix the insert 703, thus completing the axial fixation of the mounting ring 702, preventing the filter element 8 from falling off, further improving the installation stability of the filter element 8, and preventing the filter element 8 from loosening due to high pressure methanol impact.

[0048] During disassembly, pull the pull ring 706 outward. The pull ring 706 drives the insert block 703 to disengage from the insertion hole 704 of the positioning sleeve 701 through the arc block 705. The elastic clip 710 separates from the slot 711 on the side closer to the arc block 705. The movement of the pull ring 706 stops after the elastic clip 710 engages with the slot 711 on the side away from the arc block 705, thus releasing the axial lock. Pull the mounting ring 702 upward by the lever 709 to separate the limiting groove 708 from the limiting protrusion 707. Lift it upward to remove the filter element 8, which facilitates the quick replacement of the filter element 8 and improves the replacement efficiency of the filter element 8.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-pressure methanol energy recovery device, comprising a methanol separator (1), wherein the outlet end of the methanol separator (1) is connected to a methanol filter (2), and the outlet end of the methanol filter (2) is respectively connected to a hydraulic turbine power generation device (3) and a pressure reducing valve (4), characterized in that: One end of the hydraulic turbine power generation device (3) is connected to the pre-distillation system (5). The hydraulic turbine power generation device (3) converts the recovered energy into electrical energy and then transmits it to the power system (6). The output end of the pressure reducing valve (4) is connected to the pre-distillation system (5). The methanol filter (2) has a filter element (8) inserted into its top surface. The methanol filter (2) has an air inlet pipe (9) connected to its lower end. The methanol filter (2) has a liquid inlet pipe (10) with a valve connected to its lower side wall. The methanol filter (2) has an outlet pipe (11) with a valve connected to its upper outer wall. The outlet pipe (11) has a drain pipe (12) at its lower end. The methanol filter (2) has a tube sheet (13) installed inside. The tube sheet (13) has a backwashing assembly (14) at its lower end. The backwashing assembly (14) includes an annular pipe (1401) connected to the air inlet pipe (9). The methanol filter (2) is provided with a quick-release assembly (7) on its top surface. The quick-release assembly (7) includes a positioning sleeve (701). The bottom surface of the positioning sleeve (701) is fixedly connected to the top surface of the methanol filter (2). An installation ring (702) is inserted into the upper end of the positioning sleeve (701). The interior of the installation ring (702) is fixedly connected to the outer peripheral wall of the upper end of the filter element (8).

2. The high-pressure methanol energy recovery device as described in claim 1, characterized in that: The bottom surface of the methanol filter (2) is inclined. An air pump (15) is installed on the outer wall of the methanol filter (2) through a mounting base. The output end of the air pump (15) is connected to the air inlet pipe (9). Multiple filter elements (8) and quick-release components (7) are provided respectively.

3. The high-pressure methanol energy recovery device as described in claim 2, characterized in that: The backwashing assembly (14) includes a diversion pipe (1402), the lower end of which is connected to the upper end of the annular pipe (1401), the diversion pipe (1402) passes through the tube sheet (13), and the upper end of which is connected to the lower end of the filter element (8).

4. The high-pressure methanol energy recovery device as described in claim 2, characterized in that: The quick-release assembly (7) includes two insert blocks (703). The positioning sleeve (701) and the mounting ring (702) are respectively provided with multiple insertion holes (704). The insert blocks (703) are inserted into the insertion holes (704).

5. The high-pressure methanol energy recovery device as described in claim 4, characterized in that: An arc block (705) is fixed between the two insert blocks (703), and a pull ring (706) is fixed on the outer wall of the arc block (705).

6. The high-pressure methanol energy recovery device as described in claim 5, characterized in that: The positioning sleeve (701) has two limiting protrusions (707) fixedly arranged in a symmetrical structure inside. The outer wall of the mounting ring (702) has two limiting grooves (708). The inner wall of the limiting protrusion (707) and the outer wall of the limiting groove (708) are engaged. The top surface of the mounting ring (702) has two levers (709) fixedly arranged in a symmetrical structure.

7. The high-pressure methanol energy recovery device as described in claim 6, characterized in that: The outer wall of the positioning sleeve (701) is fixed with two elastic clips (710), and the outer wall of the insert block (703) is provided with two slots (711), and the elastic clips (710) engage with the slots (711).

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