A carbon dioxide synthesis reaction pressure stabilizing device

Abstract

The utility model belongs to chemical production equipment technical field especially is a kind of dimethyl carbonate synthetic reaction pressure stabilizing device, including the reaction kettle for dimethyl carbonate synthesis, the top of the reaction kettle is fixedly connected with controller and barograph, the top of the reaction kettle is provided with booster mechanism, the top of the reaction kettle is fixedly communicated with pressure relief pipe, adjustable automatic pressure relief mechanism is provided in the pressure relief pipe, the one end of pressure relief pipe is provided with waste gas purification mechanism, the top of the reaction kettle is fixedly communicated with feed pipe.The utility model structure design is reasonable, through the setting of booster mechanism, adjustable automatic pressure relief mechanism, barograph and controller, the air pressure in the reaction kettle can be accurately and stably regulated, the stable reaction is guaranteed, the quality and output of product are improved, waste gas discharged from the reaction kettle can be purified, and pollution caused by direct discharge to the environment is avoided.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, and in particular to a pressure stabilizing device for the synthesis reaction of dimethyl carbonate. Background Technology

[0002] Dimethyl carbonate is an important organic chemical raw material with a wide range of applications. In the synthesis of dimethyl carbonate, reaction pressure is a critical process parameter; its stability directly affects the conversion rate, selectivity, and product quality.

[0003] Currently, in the synthesis of dimethyl carbonate, the pressure is typically maintained by manually observing pressure gauges and adjusting inlet or outlet valves. This method is not only labor-intensive but also lacks precision, resulting in significant pressure fluctuations and making it difficult to ensure stable reaction progress, thus affecting product quality and yield. Therefore, we propose a pressure stabilization device for the dimethyl carbonate synthesis reaction to address these issues. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings mentioned above by providing a pressure stabilizing device for the synthesis reaction of dimethyl carbonate.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pressure stabilizing device for dimethyl carbonate synthesis includes a reactor for the synthesis of dimethyl carbonate. A controller and a pressure gauge are fixedly connected to the top of the reactor. A pressure boosting mechanism is provided at the top of the reactor. A pressure relief pipe is fixedly connected to the top of the reactor. An adjustable automatic pressure relief mechanism is provided inside the pressure relief pipe. A waste gas purification mechanism is provided at one end of the pressure relief pipe. A feed pipe is fixedly connected to the top of the reactor. A stirring mechanism is provided on the reactor.

[0007] As a preferred embodiment of this utility model, the pressurization mechanism includes an air inlet pump fixedly connected to the top of the reactor, a gas supply pipe fixedly connected to one side of the air inlet pump, an electromagnetic valve installed on the gas supply pipe, and an inert gas tank fixedly connected to one end of the gas supply pipe.

[0008] In a preferred embodiment of this invention, the solenoid valve, pressure gauge, and air pump are all electrically connected to the controller.

[0009] In a preferred embodiment of this utility model, the adjustable automatic pressure relief mechanism is fixedly connected to a valve seat and a partition plate inside the pressure relief pipe. An electric push rod is fixedly connected to the top of the partition plate, a pressure sensor is fixedly connected to the output shaft of the electric push rod, a lifting plate is fixedly connected to the bottom of the pressure sensor, a spring is fixedly connected to the bottom of the lifting plate, a valve core is fixedly connected to the bottom end of the spring, the valve core is movably abutting against the valve seat, and four through holes are provided on the top of the partition plate.

[0010] In a preferred embodiment of this invention, a telescopic rod is fixedly connected between the lifting plate and the valve core, and the spring is sleeved on the outside of the telescopic rod.

[0011] In a preferred embodiment of this invention, a sealing ring is fixedly fitted inside the valve seat, and the valve core is slidably and sealingly fitted inside the sealing ring.

[0012] As a preferred embodiment of this utility model, the exhaust gas purification mechanism includes a purification box fixedly connected to one end of the pressure relief pipe. A filter screen and an activated carbon screen are slidably sleeved inside the purification box. An exhaust pipe is fixedly connected to one side of the purification box. A sealing door is rotatably connected to the front side of the purification box. A front ear plate is fixedly connected to one side of the sealing door. A rear ear plate is fixedly connected to one side of the purification box. The front ear plate and the rear ear plate are threadedly connected to the same screw.

[0013] As a preferred embodiment of this utility model, two sliding grooves are provided on the upper and lower inner walls of the purification box, and sliders are slidably fitted in the sliding grooves. The four sliders are respectively fixedly connected to the upper and lower surfaces of the filter screen and the activated carbon screen.

[0014] In this utility model, a pressure stabilizing device for the synthesis reaction of dimethyl carbonate is described. During the synthesis reaction of dimethyl carbonate, a pressure gauge detects the gas pressure in the reactor in real time and sends the detected gas pressure to the controller. The controller compares the received real-time pressure value with a preset pressure range. When the real-time pressure value is lower than the preset lower pressure limit, the controller controls the solenoid valve and the air pump to open. The air pump can draw inert gas from the inert gas tank into the reactor, thereby increasing the pressure in the reactor.

[0015] In this invention, a pressure stabilizing device for dimethyl carbonate synthesis reaction can overcome the spring's squeezing force and the valve core's own weight when the real-time pressure value exceeds the preset pressure limit. The gas pressure will automatically push up the valve core, preventing it from sealing the valve seat. At this time, the waste gas in the reactor is discharged through the pressure relief pipe, reducing the gas pressure in the reactor to the preset pressure range. Then, under the spring's elasticity, the valve core automatically moves down to seal with the valve seat and stops venting. The electric push rod drives the pressure sensor and lifting plate to rise and fall. Through the feedback of the pressure sensor, the spring's squeezing force can be precisely controlled. Under the known weight of the valve core, the pressure value of the pressure relief can be precisely controlled, making the pressure relief more accurate. The waste gas enters the purification chamber through the pressure relief pipe. After passing through the filter screen, impurities in the waste gas can be filtered out. After passing through the activated carbon screen, harmful substances in the waste gas can be adsorbed and removed. The purified gas is discharged through the outlet pipe, avoiding direct discharge of waste gas and pollution of the working environment.

[0016] This utility model has a reasonable structural design. Through the setting of a pressurization mechanism, an adjustable automatic pressure relief mechanism, a pressure gauge and a controller, the gas pressure in the reactor can be accurately and stably controlled, ensuring the stable progress of the reaction, which is conducive to improving product quality and yield. It can also purify the exhaust gas discharged from the reactor, avoiding pollution to the environment caused by direct discharge. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a pressure stabilizing device for the synthesis reaction of dimethyl carbonate proposed in this utility model;

[0018] Figure 2 This is a cross-sectional view of the pressure relief pipe of a pressure stabilizing device for the synthesis reaction of dimethyl carbonate proposed in this utility model.

[0019] Figure 3 This is a cross-sectional view of the purification chamber of a pressure stabilization device for the synthesis reaction of dimethyl carbonate proposed in this utility model.

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of part A.

[0021] In the diagram: 1. Reactor; 2. Stirring mechanism; 3. Feed pipe; 4. Adjustable automatic pressure relief mechanism; 5. Pressure relief pipe; 6. Controller; 7. Pressure boosting mechanism; 8. Pressure gauge; 9. Waste gas purification mechanism; 41. Electric push rod; 42. Through hole; 43. Baffle plate; 44. Pressure sensor; 45. Lifting plate; 46. Spring; 47. Telescopic rod; 48. Sealing ring; 49. Valve core; 410. Valve seat; 71. Inert gas tank; 72. Gas supply pipe; 73. Air pump; 74. Solenoid valve; 91. Activated carbon mesh; 92. Purification box; 93. Sealing door; 94. Gas outlet pipe; 95. Front ear plate; 96. Rear ear plate; 97. Screw; 98. Slider; 99. Slide groove; 910. Filter screen. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-4 A pressure stabilizing device for the synthesis of dimethyl carbonate includes a reactor 1 for the synthesis of dimethyl carbonate. A controller 6 and a pressure gauge 8 are fixedly connected to the top of the reactor 1. A pressure boosting mechanism 7 is provided on the top of the reactor 1. A pressure relief pipe 5 is fixedly connected to the top of the reactor 1. An adjustable automatic pressure relief mechanism 4 is provided inside the pressure relief pipe 5. A waste gas purification mechanism 9 is provided at one end of the pressure relief pipe 5. A feed pipe 3 is fixedly connected to the top of the reactor 1. A stirring mechanism 2 is provided on the reactor 1.

[0024] Furthermore, refer to Figure 1 The pressurization mechanism 7 includes an air pump 73 fixedly connected to the top of the reactor 1. An air supply pipe 72 is fixedly connected to one side of the air pump 73. A solenoid valve 74 is installed on the air supply pipe 72. An inert gas tank 71 is fixedly connected to one end of the air supply pipe 72. The solenoid valve 74, the pressure gauge 8 and the air pump 73 are all electrically connected to the controller 6.

[0025] Using the above scheme: During the dimethyl carbonate synthesis reaction, the pressure gauge 8 monitors the pressure inside the reactor 1 in real time and sends the detected pressure to the controller 6. The controller 6 compares the received real-time pressure value with the preset pressure range. When the real-time pressure value is lower than the preset lower pressure limit, the controller 6 controls the solenoid valve 74 and the air pump 73 to open. The air pump 73 can draw inert gas from the inert gas tank 71 into the reactor 1, so that the pressure inside the reactor 1 rises to the preset range.

[0026] Furthermore, refer to Figure 2An adjustable automatic pressure relief mechanism 4 is fixedly connected to a valve seat 410 and a partition 43 inside a pressure relief pipe 5. An electric push rod 41 is fixedly connected to the top of the partition 43. A pressure sensor 44 is fixedly connected to the output shaft of the electric push rod 41. A lifting plate 45 is fixedly connected to the bottom of the pressure sensor 44. A spring 46 is fixedly connected to the bottom of the lifting plate 45. A valve core 49 is fixedly connected to the bottom of the spring 46. The valve core 49 is movably abutted against the valve seat 410. Four through holes 42 are opened on the top of the partition 43.

[0027] Using the above scheme: When the real-time pressure value is higher than the preset pressure limit, the squeezing force of the spring 46 and the weight of the valve core can be overcome. The air pressure will automatically push up the valve core 49, so that the valve core 49 does not seal the valve seat 410. At this time, the waste gas in the reactor 1 is discharged from the pressure relief pipe 5, so that the air pressure in the reactor 1 is reduced to the preset pressure range. At this time, under the elastic force of the spring 46, the valve core 49 automatically moves down and seals with the valve seat 410 to stop the exhaust. The electric push rod 41 drives the pressure sensor 44 and the lifting plate 45 to rise and fall. Then, through the feedback of the pressure sensor 44, the squeezing force of the spring 46 can be accurately controlled. Thus, under the known weight of the valve core 49, the pressure value of the pressure relief can be accurately controlled, making the pressure relief more precise.

[0028] Furthermore, a telescopic rod 47 is fixedly connected between the lifting plate 45 and the valve core 49, and a spring 46 is sleeved on the outside of the telescopic rod 47, which can guide the valve core 49 and the spring 46 to make their lifting and lowering more stable and smooth.

[0029] Furthermore, a sealing ring 48 is fixedly sleeved inside the valve seat 410, and the valve core 49 is slidably sealed inside the sealing ring 48, thereby improving the sealing performance of the valve seat 410 when it is closed.

[0030] Furthermore, refer to Figure 1 , Figure 3 and Figure 4 The exhaust gas purification mechanism 9 includes a purification box 92 fixedly connected to one end of the pressure relief pipe 5. A filter screen 910 and an activated carbon screen 91 are slidably sleeved inside the purification box 92. An exhaust pipe 94 is fixedly connected to one side of the purification box 92. A sealing door 93 is rotatably connected to the front side of the purification box 92. A front ear plate 95 is fixedly connected to one side of the sealing door 93. A rear ear plate 96 is fixedly connected to one side of the purification box 92. The same screw 97 is threadedly connected to the front ear plate 95 and the rear ear plate 96.

[0031] Using the above scheme: the exhaust gas enters the purification box 92 through the pressure relief pipe 5, and the impurities in the exhaust gas can be filtered out by the filter screen 910. The harmful substances in the exhaust gas can be adsorbed and removed by the activated carbon screen 91. The purified gas is discharged from the exhaust pipe 94, avoiding direct discharge of exhaust gas and pollution of the working environment.

[0032] Furthermore, two sliding grooves 99 are provided on the upper and lower inner walls of the purification box 92. Sliding sliders 98 are slidably fitted in the sliding grooves 99. The four sliding sliders 98 are respectively fixedly connected to the upper and lower surfaces of the filter screen 910 and the activated carbon screen 91, which facilitates the disassembly and assembly of the filter screen 910 and the activated carbon screen 91 for cleaning and replacement, ensuring the effect of exhaust gas purification.

[0033] In this invention, during the dimethyl carbonate synthesis reaction, a pressure gauge 8 monitors the pressure inside the reactor 1 in real time and sends the detected pressure to a controller 6. The controller 6 compares the received real-time pressure value with a preset pressure range. When the real-time pressure value is lower than the preset lower pressure limit, the controller 6 controls the solenoid valve 74 and the air pump 73 to open. The air pump 73 draws inert gas from the inert gas tank 71 into the reactor 1, increasing the pressure inside the reactor 1. When the real-time pressure value is higher than the preset upper pressure limit, it overcomes the squeezing force of the spring 46 and the weight of the valve core, and the pressure automatically pushes up the valve core 49, preventing the valve core 49 from sealing the valve seat 410. At this time, the waste gas inside the reactor 1 is discharged through the pressure relief pipe 5, allowing the gas inside the reactor 1 to escape. When the air pressure drops to the preset pressure range, the valve core 49 automatically moves down and seals with the valve seat 410 under the elastic force of the spring 46, stopping the exhaust. The electric push rod 41 drives the pressure sensor 44 and the lifting plate 45 to rise and fall. The pressure sensor 44 can then provide feedback to precisely control the squeezing force of the spring 46. Under the known weight of the valve core 49, the pressure value of the pressure relief can be precisely controlled, making the pressure relief more accurate. The exhaust gas enters the purification box 92 from the pressure relief pipe 5. After passing through the filter screen 910, impurities in the exhaust gas can be filtered out. The activated carbon screen 91 adsorbs and removes harmful substances in the exhaust gas. The purified gas is discharged from the exhaust pipe 94, avoiding direct discharge of exhaust gas and pollution of the working environment.

Claims

1. A pressure stabilizing device for the synthesis reaction of dimethyl carbonate, characterized in that, The reactor (1) is used for the synthesis of dimethyl carbonate. A controller (6) and a pressure gauge (8) are fixedly connected to the top of the reactor (1). A pressurization mechanism (7) is provided on the top of the reactor (1). A pressure relief pipe (5) is fixedly connected to the top of the reactor (1). An adjustable automatic pressure relief mechanism (4) is provided inside the pressure relief pipe (5). A waste gas purification mechanism (9) is provided at one end of the pressure relief pipe (5). A feed pipe (3) is fixedly connected to the top of the reactor (1). A stirring mechanism (2) is provided on the reactor (1).

2. The pressure stabilizing device for the synthesis reaction of dimethyl carbonate according to claim 1, characterized in that, The pressurization mechanism (7) includes an air inlet pump (73) fixedly connected to the top of the reactor (1), a gas supply pipe (72) fixedly connected to one side of the air inlet pump (73), a solenoid valve (74) is provided on the gas supply pipe (72), and an inert gas tank (71) is fixedly connected to one end of the gas supply pipe (72).

3. The pressure stabilizing device for the synthesis reaction of dimethyl carbonate according to claim 2, characterized in that, The solenoid valve (74), pressure gauge (8), and air pump (73) are all electrically connected to the controller (6).

4. The pressure stabilizing device for the synthesis reaction of dimethyl carbonate according to claim 1, characterized in that, The adjustable automatic pressure relief mechanism (4) is fixedly connected to the valve seat (410) and the partition (43) inside the pressure relief pipe (5). An electric push rod (41) is fixedly connected to the top of the partition (43). A pressure sensor (44) is fixedly connected to the output shaft of the electric push rod (41). A lifting plate (45) is fixedly connected to the bottom of the pressure sensor (44). A spring (46) is fixedly connected to the bottom of the lifting plate (45). A valve core (49) is fixedly connected to the bottom end of the spring (46). The valve core (49) moves against the valve seat (410). Four through holes (42) are opened on the top of the partition (43).

5. The pressure stabilizing device for the synthesis reaction of dimethyl carbonate according to claim 4, characterized in that, A telescopic rod (47) is fixedly connected between the lifting plate (45) and the valve core (49), and the spring (46) is sleeved on the outside of the telescopic rod (47).

6. The pressure stabilizing device for the synthesis reaction of dimethyl carbonate according to claim 4, characterized in that, A sealing ring (48) is fixedly sleeved inside the valve seat (410), and the valve core (49) is slidably and sealingly sleeved inside the sealing ring (48).

7. The pressure stabilizing device for the synthesis reaction of dimethyl carbonate according to claim 1, characterized in that, The exhaust gas purification mechanism (9) includes a purification box (92) fixedly connected to one end of the pressure relief pipe (5). A filter screen (910) and an activated carbon screen (91) are slidably sleeved inside the purification box (92). An exhaust pipe (94) is fixedly connected to one side of the purification box (92). A sealing door (93) is rotatably connected to the front side of the purification box (92). A front ear plate (95) is fixedly connected to one side of the sealing door (93). A rear ear plate (96) is fixedly connected to one side of the purification box (92). The front ear plate (95) and the rear ear plate (96) are threadedly connected to the same screw (97).

8. The pressure stabilizing device for the synthesis reaction of dimethyl carbonate according to claim 7, characterized in that, The purification box (92) has two grooves (99) on its upper and lower inner walls. Sliding blocks (98) are slidably fitted in the grooves (99). The four sliding blocks (98) are respectively fixedly connected to the upper and lower surfaces of the filter screen (910) and the activated carbon screen (91).

Images