A methanol recovery device for dimethyl adipate dissolving kettle

Abstract

The present invention discloses a methanol recovery device for a dimethyl adipate dissolving kettle, relating to the field of methanol recovery. The device comprises a dissolving kettle, a water seal tank, and a connecting pipe connecting the dissolving kettle and the water seal tank, and a transmission unit disposed within the water seal tank; the transmission unit comprises a mounting bracket mounted within the water seal tank, and a vacuum pump for increasing the gas extraction speed is mounted on the top of the mounting bracket. The present invention provides the transmission unit so that when methanol gas generated by dissolution is extracted, the methanol gas enters the water seal tank through the connecting pipe, and is subjected to liquid-sealed filtration. During the gas extraction process, the first and second flaps of the transmission unit rotate toward each other, scattering liquid. While destroying bubbles, the scattering liquid simultaneously filters gas in the air again, thereby increasing the purity of the filtered gas.

Description

Technical Field

[0001] The invention relates to the field of methanol recovery, in particular to a methanol recovery device for a dimethyl adipate dissolving kettle. Background Art

[0002] Dimethyl adipate is a colorless, transparent liquid that is insoluble in water. It is generally used in industry as a raw material for the synthesis of intermediates, pharmaceuticals, and fragrances, and as a plasticizer and high-boiling-point solvent.

[0003] According to the disclosure of announcement number CN213885624U, a methanol recovery device for a dimethyl adipate dissolving kettle comprises a dissolving kettle, a feeding port and a vent valve are provided on the top of the dissolving kettle, an agitator and a heat exchange coil are arranged in the dissolving kettle, a water seal tank and a connecting pipe are also included, a vent pipe and a water supply pipe are provided on the top of the water seal tank, the upstream end of the vent pipe is connected to the inner space of the water seal tank, the downstream end extends vertically upward and is bent 18 degrees to form a bent section, the upstream end of the water supply pipe is used to be connected to a water source, and the downstream end is connected to the inner space of the water seal tank, the water supply pipe is provided with a first valve, a guide valve is provided at the bottom of the water seal tank, the upstream end of the connecting pipe is connected to the vent valve of the dissolving kettle, and the downstream end of the connecting pipe extends into the inner space of the water seal tank and is located below the water seal liquid level. The utility model has a simple structure and is easy to operate. Under the premise of ensuring smooth feeding of adipic acid, the methanol discharged from the dissolving kettle can be effectively recovered, thereby avoiding environmental pollution and improving the utilization rate of raw materials.

[0004] When the above-mentioned methanol recovery device is in use, methanol vapor is filtered through a water seal liquid. During the process of gas contacting the liquid, bubbles of various sizes will appear. Some bubbles will float to the surface of the liquid and break. However, the methanol gas in the bubbles cannot be filtered by the water seal liquid. Then, the methanol gas will still be discharged together with the filtered gas, which will still cause certain pollution to the air. In order to further increase the efficiency of methanol liquid filtration, the present invention proposes a methanol recovery device for a dimethyl adipate dissolving kettle. Summary of the Invention

[0005] The purpose of the present invention is to provide a methanol recovery device for a dimethyl adipate dissolving kettle in order to solve the problem that part of the methanol gas is still not filtered during the existing methanol vapor filtration process.

[0006] To achieve the above object, the present invention provides the following technical solution: a methanol recovery device for a dimethyl adipate dissolving kettle, comprising a dissolving kettle, a water seal tank, and a connecting pipe connecting the dissolving kettle and the water seal tank, and a transmission unit arranged inside the water seal tank;

[0007] The transmission unit includes a mounting frame installed inside the water seal tank, a vacuum pump for increasing the extraction speed of gas is installed on the top of the mounting frame, one end of the vacuum pump is connected to a drive motor for providing power to the vacuum pump, and the outer wall of the output end of the drive motor is sleeved and engaged with a transmission belt for transmitting the rotational force of the drive motor;

[0008] The transmission unit also includes a first flap sleeved on the inner side of the other end of the transmission belt, one end of the first flap is rotatably connected to the second flap, the first flap and the second flap are both used for spreading the water seal liquid, and the first flap and the second flap are both rotatably connected to the inner side of the water seal tank.

[0009] As a further solution of the present invention: the top of the water seal tank is provided with an exhaust pipe which passes through the top of the water seal tank to the inside of the water seal tank and is used for guiding and filtering gas.

[0010] As a further solution of the present invention: the transmission unit also includes a rotating rod fixedly connected to one end of the first flap and extending to the inside of the second flap, one end of the rotating rod is fixedly connected to a first spur gear, the outer wall of the first spur gear is engaged with a second spur gear, the second spur gear is rotatably connected to the inner wall of the water seal tank, the outer wall of the second spur gear is engaged with a gear ring, the gear ring is fixedly connected to one end of the second flap, and the gear ring is rotatably connected to the inner wall of the water seal tank.

[0011] As a further solution of the present invention: the inner wall of the mounting frame is provided with a hole groove matching the rotation space of the transmission belt, and the driving motor is electrically connected to an external power supply through a wire.

[0012] As a further solution of the present invention: the inner wall of the transmission belt and the outer wall of the first flap and the output end of the driving motor are all connected through a sprocket, and the outer walls of the first flap and the second flap are fixedly connected with blades. The number of the blades is set to three, and the three blades are evenly distributed on the outer walls of the first flap and the second flap.

[0013] As a further solution of the present invention: the inner wall of the water seal tank is provided with a rotation groove matching the rotation trajectory of the gear ring, and the inner side of the gear ring is fixedly connected with a tooth block meshing with the outer wall of the second spur gear.

[0014] As a further solution of the present invention: a stirring motor is installed on the top of the dissolving kettle, a heating tube for heating the material is installed inside the dissolving kettle, and a stirring rod for stirring the material is connected to the output end of the stirring motor.

[0015] As a further solution of the present invention: a water adding pipe for adding water is connected to an outer wall of one side of the water seal tank, and a discharge pipe for replacing the water is connected to the bottom end of the water seal tank.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By setting up a transmission unit, the methanol gas produced by the dissolution can be extracted and enter the water seal tank through the connecting pipe, and the methanol gas is subjected to liquid-sealed filtration treatment. In the process of extracting the gas, the first flap and the second flap of the transmission unit will rotate towards each other to spread the liquid. While destroying the bubbles, the spread water will simultaneously filter the gas in the air again, thereby increasing the purity of the filtered gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 A cross-sectional view of the internal structure of the water seal tank of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the transmission mechanism of the present invention;

[0021] Figure 4 A cross-sectional view of the internal structure of the flap of the present invention;

[0022] Figure 5 It is a partial enlarged view of point A of the present invention.

[0023] In the figure: 1. dissolving kettle; 2. connecting pipe; 3. water seal tank; 4. exhaust pipe; 5. transmission unit; 501. mounting frame; 502. vacuum pump; 503. driving motor; 504. transmission belt; 505. first flap; 506. second flap; 507. rotating rod; 508. first spur gear; 509. second spur gear; 510. gear ring. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 5 In an embodiment of the present invention, a methanol recovery device for a dimethyl adipate dissolving kettle includes a dissolving kettle 1, a water seal tank 3, a connecting pipe 2 connecting the dissolving kettle 1 and the water seal tank 3, and a transmission unit 5 arranged inside the water seal tank 3;

[0026] The transmission unit 5 includes a mounting frame 501 installed inside the water seal tank 3. A vacuum pump 502 for increasing the extraction speed of gas is installed on the top of the mounting frame 501. One end of the vacuum pump 502 is connected to a drive motor 503 for providing power to the vacuum pump 502. The outer wall of the output end of the drive motor 503 is sleeved and engaged with a transmission belt 504 for transmitting the rotational force of the drive motor 503.

[0027] The transmission unit 5 further includes a first flap 505 sleeved on the inner side of the other end of the transmission belt 504. One end of the first flap 505 is rotatably connected to a second flap 506. The first flap 505 and the second flap 506 are both used to spread the water seal liquid. The first flap 505 and the second flap 506 are both rotatably connected to the inner side of the water seal tank 3.

[0028] The top of the water seal tank 3 is provided with an exhaust pipe 4 which penetrates the top of the water seal tank 3 to the inside of the water seal tank 3 and is used for guiding the filtered gas;

[0029] The transmission unit 5 also includes a rotating rod 507 fixedly connected to one end of the first flap 505 and extending into the interior of the second flap 506. One end of the rotating rod 507 is fixedly connected to a first spur gear 508. The outer wall of the first spur gear 508 is meshed with a second spur gear 509. The second spur gear 509 is rotatably connected to the inner wall of the water seal tank 3. The outer wall of the second spur gear 509 is meshed with a gear ring 510. The gear ring 510 is fixedly connected to one end of the second flap 506 and rotatably connected to the inner wall of the water seal tank 3.

[0030] The inner wall of the mounting frame 501 is provided with a hole slot that matches the rotation space of the transmission belt 504, and the driving motor 503 is electrically connected to the external power supply through a wire;

[0031] A stirring motor is installed at the top of the dissolving kettle 1, a heating tube for heating the material is installed inside the dissolving kettle 1, and a stirring rod for stirring the material is connected to the output end of the stirring motor;

[0032] One side outer wall of the water seal tank 3 is connected to a water adding pipe for adding water, and the bottom end of the water seal tank 3 is connected to a drain for replacing the water.

[0033] In this embodiment, the material inside the dissolving kettle 1 is stirred and heated by starting the stirring motor and the heating pipe, and the driving motor 503 is started at the same time. The operation of the driving motor 503 will make the vacuum pump 502 work, and the working vacuum pump 502 will accelerate the extraction of the gas generated in the dissolving kettle 1 during the heating and stirring process, and enter the interior of the water seal tank 3 through the connecting pipe 2. Since the output end of the connecting pipe 2 is immersed in the submerged position of the water seal liquid, the contact between the gas and the liquid will produce bubbles, most of which will burst in the water and be discharged to the top of the liquid surface, while some un-cracked bubbles will also float above the liquid surface. At the same time, the operation of the driving motor 503 will also drive the transmission belt 504 sleeved on its output end to transmit, and the transmission belt 504 will drive the first flap 505 and the rotating rod 507. The rotation of the rotating rod 507 will drive the first spur gear 508 and the second spur gear 509 to rotate. At this time, the second spur gear 509 and the first The rotation direction of the spur gear 508 will be opposite, and the rotation of the second spur gear 509 will transmit force to the gear ring 510, so that the gear ring 510 synchronously drives the second flap 506 to rotate. Then the rotation direction of the gear ring 510 is the same as that of the second spur gear 509, that is, the rotation direction of the gear ring 510 and the second flap 506 is opposite to that of the rotating rod 507 and the first flap 505. Then the rotation directions of the first flap 505 and the second flap 506 can be concluded to be in opposite states. Then the first flap 505 and the second flap 506 rotating in opposite directions will spread water in two directions above the water surface. At the same time, the rotation of the first flap 505 and the second flap 506 will destroy some of the floating bubbles, reducing the leakage of unfiltered gas as the bubbles float, and the spread water will also filter the gas again. The filtered gas will flow out to the outside through the exhaust pipe 4, further increasing the purity of the filtration.

[0034] Please refer to Figure 1-Figure 5 The inner wall of the transmission belt 504 is connected to the outer wall of the first flap 505 and the output end of the driving motor 503 through a sprocket. The outer walls of the first flap 505 and the second flap 506 are fixedly connected with blades. There are three blades, and the three blades are evenly distributed on the outer walls of the first flap 505 and the second flap 506. The inner wall of the water seal tank 3 is provided with a rotating groove that matches the rotation trajectory of the gear ring 510. The inner side of the gear ring 510 is fixedly connected with a tooth block that meshes with the outer wall of the second spur gear 509.

[0035] In this embodiment: through this structure, the material can be placed into the interior of the dissolving kettle 1 through the feeding port of the dissolving kettle 1, and the material is stirred and heated by the stirring motor, stirring rod and heating tube. The generated gas will be accelerated by the suction action of the vacuum pump 502 and enter the interior of the dissolving kettle 1 through the connecting pipe 2, and the operation of the driving motor 503 will drive the first flap 505 and the second flap 506 to rotate. The opposite rotation of the first flap 505 and the second flap 506 will increase the area of ​​water spreading and further increase the filtering of the gas.

[0036] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A methanol recovery device for a dimethyl adipate dissolving kettle, comprising a dissolving kettle (1), a water seal tank (3), and a connecting pipe (2) connecting the dissolving kettle (1) and the water seal tank (3), characterized in that: A transmission unit (5) disposed inside the water seal tank (3); The transmission unit (5) includes a mounting frame (501) mounted inside the water seal tank (3); a vacuum pump (502) for increasing the extraction speed of gas is mounted on the top of the mounting frame (501); one end of the vacuum pump (502) is connected to a drive motor (503) for providing power to the vacuum pump (502); and a transmission belt (504) for transmitting the rotational force of the drive motor (503) is sleeved and engaged with the outer wall of the output end of the drive motor (503); The transmission unit (5) further comprises a first flap (505) sleeved on the inner side of the other end of the transmission belt (504); one end of the first flap (505) is rotatably connected to a second flap (506); the first flap (505) and the second flap (506) are both used for spreading the water seal liquid; the first flap (505) and the second flap (506) are both rotatably connected to the inner side of the water seal tank (3); The transmission unit (5) further comprises a rotating rod (507) fixedly connected to one end of the first flap (505) and extending to the interior of the second flap (506); one end of the rotating rod (507) is fixedly connected to a first spur gear (508); an outer wall of the first spur gear (508) is meshed with a second spur gear (509); the second spur gear (509) is rotatably connected to the inner wall of the water seal tank (3); an outer wall of the second spur gear (509) is meshed with a gear ring (510); the gear ring (510) is fixedly connected to one end of the second flap (506); and the gear ring (510) is rotatably connected to the inner wall of the water seal tank (3); The inner wall of the transmission belt (504) is connected to the outer wall of the first flap (505) and the output end of the drive motor (503) through a sprocket. The outer walls of the first flap (505) and the second flap (506) are fixedly connected with blades. The number of the blades is set to three, and the three blades are evenly distributed on the outer walls of the first flap (505) and the second flap (506).

2. The methanol recovery device for a dimethyl adipate dissolving kettle according to claim 1, characterized in that: The top of the water seal tank (3) is provided with an exhaust pipe (4) that penetrates the top of the water seal tank (3) to the inside of the water seal tank (3) and is used for filtering gas at the diversion point.

3. The methanol recovery device for a dimethyl adipate dissolving kettle according to claim 1, characterized in that: The inner wall of the mounting frame (501) is provided with a hole slot that matches the rotation space of the transmission belt (504), and the driving motor (503) is electrically connected to an external power supply via a wire.

4. The methanol recovery device for a dimethyl adipate dissolving kettle according to claim 1, characterized in that: The inner wall of the water seal tank (3) is provided with a rotation groove that matches the rotation trajectory of the gear ring (510), and the inner side of the gear ring (510) is fixedly connected with a tooth block that meshes with the outer wall of the second spur gear (509).

5. The methanol recovery device for a dimethyl adipate dissolving kettle according to claim 1, characterized in that: A stirring motor is installed at the top of the dissolving kettle (1), a heating tube for heating the material is installed inside the dissolving kettle (1), and a stirring rod for stirring the material is connected to the output end of the stirring motor.

6. The methanol recovery device for a dimethyl adipate dissolving kettle according to claim 1, characterized in that: One side outer wall of the water seal tank (3) is connected to a water adding pipe for adding water, and the bottom end of the water seal tank (3) is connected to a discharge pipe for replacing the water.

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