Gas flow accurate control device in dimethyl carbonate production

Abstract

The utility model relates to the technical field of gas flow control, and discloses a gas flow accurate control device in dimethyl carbonate production, which comprises a reactor and a gas guide cover which is arranged on the reactor and is used for guiding gas. The flow guide plate is arranged in an inner cavity of the gas flow guide cover; through cooperation of the gas guide cover, the flow adjusting mechanism and the guide plate, the position of the sealing piece can be adjusted through the driving piece, the space for gas to pass through is gradually increased in the moving process of the sealing piece, and when the sealing piece reaches half of the total stroke, the gas supply flow speed is maximum, and the gas supply efficiency is improved. And when the sealing piece performs the second half stroke, the gas flowing space is gradually reduced until the gas flowing space is closed, and compared with a traditional reciprocating stroke, abrasion during gas flow adjustment can be reduced, so that gas leakage caused by excessive abrasion is avoided, the precision of gas flow adjustment is improved, and the production quality of dimethyl carbonate is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas flow control technology, specifically a device for precise control of gas flow in the production of dimethyl carbonate. Background Technology

[0002] Dimethyl carbonate is an organic compound, a low-toxicity, environmentally friendly, and widely used chemical raw material. It is an important organic synthesis intermediate, containing functional groups such as carbonyl, methyl, and methoxy groups in its molecular structure, exhibiting various reactivity properties. In production, it is characterized by safety, convenience, low pollution, and easy transportation. Due to its low toxicity, dimethyl carbonate is a promising "green" chemical product. The oxidative carbonylation method is commonly used in the production of dimethyl carbonate. Since the production process requires the addition of necessary gases to the reaction vessel, conventional methods involve opening and closing valves to achieve gas addition during the dimethyl carbonate reaction.

[0003] However, the operation of the valve during opening and closing is relatively cumbersome, which increases the number of valve strokes. The reduced wear resistance of the valve can lead to leakage of raw material gas during the production of dimethyl carbonate, which in turn can cause excessive replenishment of raw material gas in the reactor, resulting in local overheating and potentially causing the reactor to explode. Therefore, we need to propose a precise gas flow control device for the production of dimethyl carbonate. Utility Model Content

[0004] The purpose of this invention is to provide a precise gas flow control device for the production of dimethyl carbonate. By setting a pneumatic adjustment mechanism, the gas flow rate can be adjusted, which facilitates the supply and shutdown of gas. At the same time, it shortens the opening and closing stroke of the gas supply, reduces wear, and avoids leakage of raw material gas, thereby improving the accuracy of gas flow control and thus improving the production efficiency of dimethyl carbonate, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for precise control of gas flow rate in dimethyl carbonate production, comprising:

[0006] Reactor, and a gas flow guide hood installed on the reactor to guide the gas flow;

[0007] A guide plate is installed inside the gas guide hood, and a flow regulating mechanism is used to regulate the gas flow rate by adjusting the distance between the guide plate and the gas guide plate.

[0008] The flow regulation mechanism includes a drive component disposed at one end of the gas guide shroud and a sealing component whose position on the guide plate is adjusted by the drive component. The sealing component has an I-shaped cross-section.

[0009] Preferably, a first sealing groove is provided on one side of the guide plate, and a second sealing groove is provided on the other side of the guide plate, with an air hole for gas flow provided between the first sealing groove and the second sealing groove.

[0010] Preferably, the sealing element includes a main sealing disc, a connecting shaft, and a secondary sealing disc. The two ends of the connecting shaft are fixedly connected to the main sealing disc and the secondary sealing disc, respectively. A first sealing cone pad that fits into the first sealing groove is fixedly connected to one side of the main sealing disc, and a second sealing cone pad that fits into the second sealing groove is fixedly connected to one side of the secondary sealing disc.

[0011] Preferably, the driving component includes a cylinder and a reinforcing plate. The cylinder is disposed on one side of the gas guide shroud, and the telescopic end of the cylinder is located in the inner cavity of the gas guide shroud and fixed to one side of the reinforcing plate. The inner cavity of the gas guide shroud is provided with a corrugated sleeve to protect the telescopic rod of the cylinder. The reinforcing plate is fixedly connected to the other side of the sealing main plate.

[0012] Preferably, the outer side of the sealing main plate is provided with three sets of connecting lugs, each of the three sets of connecting lugs is provided with a socket, and a stabilizing guide rod fixed to one side of the guide plate is inserted into each set of sockets.

[0013] Preferably, the gas guide hood is mainly made of a tube, a gas collecting hood and a connecting pipe integrally formed, the guide plate is fixedly connected to the inner cavity of the tube, and an air inlet pipe is provided on the outer side of the tube.

[0014] Preferably, it also includes a flow detection mechanism disposed on the connecting pipe, the flow detection mechanism including a gas flow sensor and a gas flow meter, the gas flow sensor being installed in the inner cavity of the connecting pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention primarily utilizes the cooperation between a gas guide shroud, a flow regulation mechanism, and a guide plate. Through a driving component, the position of the sealing element can be adjusted, gradually increasing the space for gas passage as the sealing element moves. When the sealing element reaches half of its total stroke, the gas supply flow rate is at its maximum. As the sealing element completes the latter half of its stroke, the gas flow space gradually decreases until it closes. Compared to traditional reciprocating strokes, this design reduces wear during gas flow regulation, preventing excessive wear that could lead to gas leakage. It also improves the accuracy of gas flow regulation, thereby enhancing the production quality of dimethyl carbonate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the gas guide hood of this utility model;

[0019] Figure 3 This is a schematic diagram of the second sealing cone gasket structure of the sealing element of this utility model;

[0020] Figure 4 This is a schematic diagram of the first sealing cone gasket structure of the sealing element of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the guide plate of this utility model.

[0022] In the diagram: 1. Reactor; 2. Gas guide hood; 21. Tube; 22. Gas collection hood; 23. Connecting pipe; 3. Flow regulating mechanism; 31. Cylinder; 32. Reinforcing plate; 33. Seal; 331. Main sealing plate; 332. Connecting lug; 333. Insertion hole; 334. Connecting shaft; 335. Secondary sealing plate; 336. First sealing cone; 337. Second sealing cone; 34. Stabilizing guide rod; 35. Corrugated sleeve; 4. Flow detection mechanism; 41. Gas flow sensor; 42. Gas flow meter; 5. Guide plate; 51. First sealing groove; 52. Second sealing groove; 53. Gas hole; 6. Inlet pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a technical solution: a device for precise control of gas flow in the production of dimethyl carbonate, comprising:

[0025] Reactor 1, and gas guide hood 2 installed on reactor 1 to guide the gas flow;

[0026] A guide plate 5 is installed inside the gas guide hood 2, and a flow regulating mechanism 3 is used to regulate the gas flow by adjusting the distance between the guide plate 5 and the gas guide hood 2. The guide plate 5 and the flow regulating mechanism 3 work together to achieve precise control of the gas flow.

[0027] The flow regulation mechanism 3 includes a drive component disposed at one end of the gas guide shroud 2 and a sealing component 33 whose position on the guide plate 5 is adjusted by the drive component. The sealing component 33 has an I-shaped cross section.

[0028] A first sealing groove 51 is provided on one side of the guide plate 5, and a second sealing groove 52 is provided on the other side of the guide plate 5. A gas hole 53 for gas flow is provided between the first sealing groove 51 and the second sealing groove 52. The gas entering the reactor 1 is guided by the gas guide hood 2, which can optimize the uniformity of gas distribution, avoid local airflow turbulence from affecting the reaction efficiency, and provide a stable gas channel for subsequent flow regulation.

[0029] The sealing element 33 includes a sealing main disc 331, a connecting shaft 334, and a sealing secondary disc 335. The two ends of the connecting shaft 334 are fixedly connected to the sealing main disc 331 and the sealing secondary disc 335, respectively. A first sealing cone pad 336 that fits into the first sealing groove 51 is fixedly connected to one side of the sealing main disc 331. A second sealing cone pad 337 that fits into the second sealing groove 52 is fixedly connected to one side of the sealing secondary disc 335. The distance between the air hole 53 on the guide plate 5 and the sealing element 33 can be adjusted to change the gas flow cross-sectional area, thereby linearly adjusting the flow rate. The I-shaped cross-section design of the sealing element 33 can simultaneously adapt to the first sealing groove 51 and the second sealing groove 52, improving sealing accuracy and adjustment flexibility.

[0030] The driving component includes a cylinder 31 and a reinforcing plate 32. The cylinder 31 is located on one side of the gas guide shroud 2. The telescopic end of the cylinder 31 is located in the inner cavity of the gas guide shroud 2 and fixed to one side of the reinforcing plate 32. The inner cavity of the gas guide shroud 2 is provided with a corrugated sleeve 35 to protect the telescopic rod of the cylinder 31. The reinforcing plate 32 is fixedly connected to the other side of the sealing main plate 331. The cylinder 31 provides power to achieve precise displacement of the sealing element 33, with a fast response speed (such as millisecond-level telescopic movement), which is suitable for dynamic flow regulation requirements. The corrugated sleeve 35 can protect the telescopic rod of the cylinder 31 from gas corrosion or impurity wear, extending the service life of the equipment.

[0031] Three sets of connecting lugs 332 are provided on the outer side of the sealing main plate 331. Each set of connecting lugs 332 has an insertion hole 333. A stabilizing guide rod 34 fixed to one side of the guide plate 5 is inserted into each insertion hole 333. By using the cooperation of the three sets of connecting lugs 332 and the stabilizing guide rod 34, the radial displacement of the seal 33 during the adjustment process can be limited, ensuring that it moves smoothly along the axial direction and improving the linearity and repeatability of the flow adjustment.

[0032] The gas guide hood 2 is mainly made of tube 21, gas collection hood 22 and connecting pipe 23 integrally formed. The guide plate 5 is fixedly connected to the inner cavity of tube 21. An air inlet pipe 6 is provided on the outside of tube 21 to reduce the risk of interface leakage. The air inlet pipe 6 facilitates gas access. The gas collection hood 22 can gather the airflow and guide it to the connecting pipe 23, providing a stable gas flow field for flow detection.

[0033] It also includes a flow detection mechanism 4 installed on the connecting pipe 23. The flow detection mechanism 4 includes a gas flow sensor 41 and a gas flow meter 42. The gas flow sensor 41 is installed in the inner cavity of the connecting pipe 23 to monitor the gas flow in real time and feed it back to the control system to form a closed-loop regulation, ensuring that the actual flow is consistent with the set value and improving the control accuracy.

[0034] In operation, gas is introduced into the tube 21 of the gas guide shroud 2 through the inlet pipe 6. The cylinder 31 drives the seal 33 to move, which in turn moves the seal 33 axially along the stabilizing guide rod 34, moving the main sealing disc 331 away from the guide plate 5, thereby opening the vent 53 to facilitate gas passage. When the seal 33 reaches half its stroke, the air intake space of the vent 53 reaches its maximum, thus achieving the fastest gas flow rate into the reactor 1. The gas flow rate entering the reactor 1 is detected in real time by the gas flow sensor 41 and displayed in real time by the gas flow meter 42. After the required flow rate volume of gas is introduced, the cylinder 31 continues to drive the seal 33 to move axially, which in turn moves the secondary sealing disc 335 closer to the guide plate 5, reducing the effective outflow area of ​​the vent 53 for gas discharge, thereby reducing the gas flow rate and closing the vent 53. This achieves one-way flow control of gas flow, reducing wear caused by the reciprocating stroke of the cylinder 31, thereby improving the service life of the cylinder 31 and achieving precise control of gas flow in dimethyl carbonate production.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for precise control of gas flow rate in the production of dimethyl carbonate, characterized in that, include: Reactor (1), and gas guide hood (2) installed on reactor (1) to guide gas flow; A guide plate (5) is installed in the inner cavity of the gas guide hood (2), and a flow regulating mechanism (3) is used to regulate the gas flow by adjusting the distance between the guide plate (5); The flow regulation mechanism (3) includes a drive component disposed at one end of the gas guide shroud (2) and a sealing component (33) whose position on the guide plate (5) is adjusted by the drive component. The sealing component (33) has an I-shaped cross section.

2. The device for precise control of gas flow rate in dimethyl carbonate production according to claim 1, characterized in that: The guide plate (5) has a first sealing groove (51) on one side and a second sealing groove (52) on the other side. A vent (53) for gas flow is provided between the first sealing groove (51) and the second sealing groove (52).

3. The device for precise control of gas flow in dimethyl carbonate production according to claim 2, characterized in that: The sealing element (33) includes a sealing main disc (331), a connecting shaft (334), and a sealing secondary disc (335). The two ends of the connecting shaft (334) are fixedly connected to the sealing main disc (331) and the sealing secondary disc (335) respectively. A first sealing cone pad (336) that fits into the first sealing groove (51) is fixedly connected to one side of the sealing main disc (331). A second sealing cone pad (337) that fits into the second sealing groove (52) is fixedly connected to one side of the sealing secondary disc (335).

4. The device for precise control of gas flow rate in dimethyl carbonate production according to claim 3, characterized in that: The driving component includes a cylinder (31) and a reinforcing plate (32). The cylinder (31) is located on one side of the gas guide shroud (2). The telescopic end of the cylinder (31) is located in the inner cavity of the gas guide shroud (2) and fixed to one side of the reinforcing plate (32). The inner cavity of the gas guide shroud (2) is provided with a corrugated sleeve (35) to protect the telescopic rod of the cylinder (31). The reinforcing plate (32) is fixedly connected to the other side of the sealing main plate (331).

5. The device for precise control of gas flow rate in dimethyl carbonate production according to claim 4, characterized in that: The outer side of the sealing main plate (331) is provided with three sets of connecting lugs (332), and each of the three sets of connecting lugs (332) is provided with a socket (333). Each set of sockets (333) is provided with a stabilizing guide rod (34) fixed to one side of the guide plate (5).

6. The device for precise control of gas flow rate in dimethyl carbonate production according to claim 1, characterized in that: The gas guide hood (2) is mainly made of a tube (21), a gas collection hood (22) and a connecting pipe (23) integrally formed. The guide plate (5) is fixedly connected to the inner cavity of the tube (21), and an air inlet pipe (6) is provided on the outside of the tube (21).

7. The device for precise control of gas flow rate in dimethyl carbonate production according to claim 6, characterized in that: It also includes a flow detection mechanism (4) installed on the connecting pipe (23), the flow detection mechanism (4) including a gas flow sensor (41) and a gas flow meter (42), the gas flow sensor (41) being installed in the inner cavity of the connecting pipe (23).

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