BYD slurry bed reactor

Abstract

The invention discloses a BYD slurry bed reactor, and particularly relates to the technical field of BYD processing equipment.The BYD slurry bed reactor comprises a reactor body, a servo motor is fixedly mounted at the top of the reactor body, a shaft rod is fixedly connected to the driving end of the servo motor, stirring paddles are fixedly mounted on the two sides of the end, away from the servo motor, of the shaft rod, and the stirring paddles are fixedly connected to the driving end of the servo motor; a sealing plug is clamped in the center of the bottom of the reactor, a porous partition plate is fixedly mounted above the inner wall of the reactor, the interior of the reactor is divided into a reaction cavity and a defoaming cavity by the porous partition plate from bottom to top, a fusion reaction mechanism is arranged in the reaction cavity, and a bubble eliminating mechanism is arranged in the defoaming cavity; large acetylene gas bubbles which are not subjected to full contact reaction are crushed and refined into small bubbles, the small bubbles are settled and refluxed to a reaction area through gravity during bubble crushing to be subjected to secondary contact reaction with a formaldehyde solution, fine powder carried by the bubbles falls back to a reaction cavity, the concentration of a catalyst is prevented from being reduced, and the reaction conversion rate of BYD is increased.

Description

Technical Field

[0001] This invention relates to the field of BYD processing equipment technology, and in particular to a BYD slurry bed reactor. Background Technology

[0002] The BYD slurry bed reactor is a gas-liquid-solid three-phase reactor specifically designed for the catalytic addition synthesis of 1,4-butynediol from acetylene and formaldehyde. In recent years, it has been widely used in petroleum processing and coal chemical production fields, such as the synthesis of 1,4-butynediol (BYD). 1,4-Butynediol (BYD) is a white to pale yellow crystalline solid with a certain degree of hardness at room temperature and pressure.

[0003] In actual production, the mixed gas (mainly acetylene and nitrogen, with acetylene as the reaction gas) enters from the bottom of the reactor, passes through the liquid inside the reactor (i.e., formaldehyde solution, which contains solid particulate catalyst), and then exits from the top outlet of the reactor. However, acetylene has extremely low solubility in water, and the gas is dispersed in the liquid phase in the form of bubbles. If the bubble diameter is too large, the acetylene and formaldehyde will not be able to fully contact each other, resulting in a low reaction conversion rate. Summary of the Invention

[0004] The main objective of this invention is to provide a BYD slurry bed reactor that can effectively solve the problems mentioned above.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A BYD slurry bed reactor includes a reactor, a servo motor fixedly installed on the top of the reactor, a shaft fixedly connected to the drive end of the servo motor, and stirring paddles fixedly installed on both sides of the shaft away from the servo motor. A sealing plug is snapped into the center of the bottom of the reactor. A porous baffle is fixedly installed on the upper part of the inner wall of the reactor, and the interior of the reactor is divided into a reaction chamber and a defoaming chamber from bottom to top by the porous baffle. The reaction chamber is equipped with a fusion reaction mechanism, and the defoaming chamber is equipped with a bubble elimination mechanism.

[0006] Preferably, the fusion reaction mechanism includes an air inlet pipe, with both air outlets on both sides of the air inlet pipe extending into the interior of the reactor, and a number of baffles evenly arranged around the inner wall of the reaction chamber.

[0007] Preferably, liquid inlet pipes are fixedly installed on both sides of the interior of the reaction chamber, a grid frame is fixedly installed in the middle of the inner wall of the reaction chamber, and a main distribution component is fixedly connected to the top of the grid frame.

[0008] Preferably, the bottom ends of the liquid inlet pipes on both sides are fixedly connected to the inside of the main distribution component, and the formaldehyde solution input from the liquid inlet pipes on both sides is evenly distributed and covered inside the reaction chamber by the main distribution component and the grid frame.

[0009] Preferably, the bubble elimination mechanism includes a flow guide shroud, which is fixedly installed on the top of the porous partition. The opening of the flow guide shroud decreases in size from bottom to top, and a hollow plate is fixedly connected to the top of the flow guide shroud.

[0010] Preferably, a pair of crushing rollers are fixedly connected to both sides of the outer wall of the shaft located in the inner area of ​​the guide shroud, and a collecting shroud is fixedly connected to the inner wall of the defoaming chamber located above the hollow plate, and a sponge is fixedly connected to the upper center of the collecting shroud.

[0011] Preferably, a circulation pipe is installed inside the collecting hood, and the end of the circulation pipe away from the collecting hood passes through the reactor and extends into the interior of the reaction chamber. An air outlet pipe is fixedly connected to the interior of the defoaming chamber on the outer wall of the collecting hood. Valves are fixedly installed on the outer walls of both the circulation pipe and the air outlet pipe.

[0012] Preferably, a control panel is fixedly installed on the outer wall of the reactor, and the control panel is electrically connected to the servo motor and the valve.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This device divides the reaction environment of BYD into a reaction chamber and a defoaming chamber. Larger acetylene gas bubbles that have not fully reacted, as well as some of the acetylene gas discharged after the reaction, are separated and temporarily stored. They are collected in the defoaming chamber and broken down into smaller bubbles. Through the gravity settling of the bubbles and the adsorption effect of the formaldehyde solution film, the fine powder carried by the bubbles falls back into the reaction chamber. The powder is more evenly distributed in the reaction chamber and comes into contact with the formaldehyde solution, which is equivalent to increasing the secondary reaction opportunity of acetylene. At the same time, the catalyst powder carried by the bubbles as they move upward can be reused, preventing the catalyst powder from being carried away from the reaction zone by the acetylene gas in the form of bubbles. This avoids the problem of the catalyst concentration in the reaction chamber gradually decreasing, and eliminates the need for frequent catalyst replenishment.

[0014] 2. This device reduces the amount of droplets entrained in the gas phase by allowing the droplets carried by the bubbles to fall back along with the fine powder during bubble breakage. This reduced droplet entrainment can prevent pipe blockage and equipment corrosion during subsequent gas processing. Acetylene gas is fully broken and separated in the defoaming chamber, resulting in extremely low droplet and fine powder content in the discharged gas. This also makes the gas flow in the pipeline more uniform, reduces the risk of electrostatic accumulation, and improves the acetylene recovery efficiency. Attached Figure Description

[0015] Figure 1This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the bottom structure of the reactor of the present invention; Figure 4 This is a schematic diagram of the internal structure of the reactor of the present invention; Figure 5 This is a partial structural diagram of the defoaming chamber of the present invention; Figure 6 This is a schematic diagram of the flow divider structure of the present invention; Figure 7 This is a schematic diagram showing the positions of the circulation pipe and the exhaust pipe of the present invention.

[0016] In the diagram: 1. Reactor; 2. Servo motor; 3. Shaft; 4. Sealing plug; 5. Agitator; 6. Control panel; The fusion reaction mechanism includes: 71, air inlet pipe; 72, baffle; 73, liquid inlet pipe; 74, main distribution component; 75, grid frame; 8. Perforated partition; The bubble elimination mechanism includes: 91, a flow guide; 92, a hollow plate; 93, a crushing roller; 94, a collection hood; 95, a sponge; 96, a circulation pipe; 97, an air outlet pipe; and 98, a valve. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0018] Example 1, as Figures 1 to 7 As shown, a BYD slurry bed reactor includes a reactor 1. The BYD slurry bed reactor is a gas-liquid-solid three-phase reactor specifically adapted for the catalytic addition synthesis of 1,4-butynediol by acetylene and formaldehyde (main reaction: 2CH2O + C2H2 → HOCH2C≡CCH2OH). Its core feature is that there is a slurry system with suspended catalyst inside the reactor. The target reaction is achieved through efficient three-phase mixing and mass transfer. A servo motor 2 is fixedly installed on the top of the reactor 1. A shaft 3 is fixedly connected to the drive end of the servo motor 2. A stirring paddle 5 is fixedly installed on both sides of the end of the shaft 3 away from the servo motor 2. A sealing plug 4 is snapped into the center of the bottom of the reactor 1. A porous baffle 8 is fixedly installed on the upper part of the inner wall of the reactor 1. The interior of the reactor 1 is divided into a reaction chamber and a defoaming chamber from bottom to top by the porous baffle 8. The reaction chamber is equipped with a fusion reaction mechanism, and the defoaming chamber is equipped with a bubble elimination mechanism. Specifically, acetylene gas and formaldehyde solution are collected and mixed inside the reaction chamber. The stirring paddles 5 set on both sides of the bottom of the shaft 3 are driven by the servo motor 2 to rotate, so that the two can fully mix and react. Finally, the reaction product BYD can be discharged by pulling out the sealing plug 4 at the bottom of the reactor 1. During the reaction, the acetylene gas that has not fully reacted flows upward and collects inside the defoaming chamber.

[0019] The fusion reaction mechanism includes an air inlet pipe 71, with air outlets on both sides of the air inlet pipe 71 extending into the interior of the reactor 1. Several baffles 72 are evenly arranged around the inner wall of the reaction chamber, and each baffle 72 is inclined upward from the center outward. Specifically, the inlet end of the inlet pipe 71 is first connected to the relevant acetylene gas storage equipment, so that the acetylene gas is transported from the bottom of the reactor 1 into the reaction chamber. As the gas flows upward, it covers the entire reaction zone with the cooperation of various baffles 72, disrupting the circular motion of the formaldehyde liquid and forming an axial circulation.

[0020] like Figure 2 , Figure 4 and Figure 6 As shown, inlet pipes 73 are fixedly installed on both sides of the inside of the reaction chamber, and a grid frame 75 is fixedly installed in the middle of the inner wall of the reaction chamber. A main distribution component 74 is fixedly connected to the top of the grid frame 75. The aperture of the main distribution component 74 is larger than the aperture of the grid frame 75. The bottom ends of the inlet pipes 73 on both sides are fixedly connected to the inside of the main distribution component 74. The formaldehyde solution input by the inlet pipes 73 on both sides is evenly distributed and covered inside the reaction chamber through the main distribution component 74 and the grid frame 75. Specifically, the two inlet pipes 73 are connected to the relevant formaldehyde solution storage equipment, and the formaldehyde solution containing fine catalyst powder is transported to the interior of the main distribution component 74. After being diverted by the main distribution component 74, the slurry flows to the interior of the grid frame 75 for secondary diversion, so that the slurry evenly covers all positions in the reaction zone, and the formaldehyde solution and acetylene gas are fully in contact.

[0021] Example 2, as Figure 4 As shown, the bubble elimination mechanism includes a flow guide shroud 91, which is fixedly installed on the top of the porous partition 8. The opening of the flow guide shroud 91 decreases in size from bottom to top. A hollow plate 92 is fixedly connected to the top of the flow guide shroud 91. A pair of crushing rollers 93 are fixedly connected to both sides of the outer wall of the shaft 3 located in the inner area of ​​the flow guide shroud 91. Specifically, the unreacted gas escaping from the top of the reaction zone flows upward through the porous partition 8 into the defoaming chamber. The opening of the guide hood 91 decreases in size from bottom to top, slowing down the acetylene gas flow and causing it to converge at the center of the defoaming chamber. As the shaft 3 drives the rotation of the two sets of crushing rollers 93, larger acetylene bubbles are broken down into smaller bubbles. Through gravity settling during bubble breakage and adsorption by the formaldehyde solution film, the fine powder carried by the bubbles falls back into the reaction chamber, preventing the catalyst powder from being carried away from the reaction zone along with the acetylene gas in the form of bubbles. This avoids the problem of the catalyst concentration gradually decreasing in the reaction chamber, eliminating the need for frequent catalyst replenishment. Acetylene, as the core raw material for BYD production, improves the overall utilization rate of acetylene through secondary reaction of large bubbles and recovery of discharged acetylene. At the same time, the recovered formaldehyde (falling back with the droplets) can be directly reused, reducing formaldehyde consumption per unit. Furthermore, acetylene is a flammable and explosive gas. In traditional processes, bubbles containing fine powder and droplets tend to accumulate in the pipeline, forming localized high-concentration acetylene areas. Additionally, the fine powder may generate static electricity (discharge caused by friction and impact). This technical solution allows the acetylene gas to be fully broken up and separated in the defoaming chamber, resulting in extremely low droplet and fine powder content in the discharged gas. The gas flow in the pipeline is more uniform, and the risk of static electricity accumulation is reduced by more than 80%. At the same time, the acetylene recovery efficiency is improved, and the venting volume is reduced.

[0022] like Figures 4 to 5 As shown, a collection cover 94 is fixedly connected to the inner wall of the defoaming chamber above the hollow plate 92, and a sponge 95 is fixedly connected to the upper middle part of the collection cover 94. Specifically, the acetylene gas that remains in the defoaming chamber after secondary utilization can flow upwards to the sponge 95 to separate the water vapor it carries.

[0023] like Figures 1 to 2 and Figure 7 As shown, a circulation pipe 96 is installed inside the collection hood 94. The end of the circulation pipe 96 away from the collection hood 94 passes through the reactor 1 and extends into the interior of the reaction chamber. The interior of the defoaming chamber is located on the outer wall of the collection hood 94 and is fixedly connected to an outlet pipe 97. Valves 98 are fixedly installed on the outer walls of both the circulation pipe 96 and the outlet pipe 97. A control panel 6 is fixedly installed on the outer wall of the reactor 1. The control panel 6 is electrically connected to the servo motor 2 and the valves 98. Specifically, by opening the valve 98 on the outer wall of the circulation pipe 96 through the control panel 6, the small-sized acetylene gas after the bubble breaking process can flow back into the interior of the reaction chamber along the circulation pipe 96 for secondary reaction and utilization. At this time, the valve 98 on the outer wall of the outlet pipe 97 is in the closed state. Accordingly, after the entire reaction process is completed, the valve 98 on the outer wall of the circulation pipe 96 is closed, so that the residual gas mixture in the reaction process is output from the outlet pipe 97 to the corresponding collection and processing equipment.

[0024] Working principle: First, the inlet end of the inlet pipe 71 is connected to the relevant acetylene gas storage equipment, so that the acetylene gas is transported from the bottom of the reactor 1 into the reaction chamber. As the gas flows upward, it covers the entire reaction zone with the cooperation of the baffles 72, disrupting the circumferential motion of the formaldehyde liquid and forming an axial circulation. At the same time, the liquid inlet pipes 73 on both sides are connected to the relevant formaldehyde solution storage equipment, so that the formaldehyde solution containing fine catalyst powder is transported to the inside of the main distribution component 74. After the slurry is diverted by the main distribution component 74, it flows to the inside of the grid frame 75 for secondary diversion, so that the slurry is evenly covered in all positions of the reaction zone, and the formaldehyde solution and acetylene gas are fully in contact. Acetylene gas and formaldehyde solution are collected and mixed inside the reaction chamber. The stirring paddles 5 set on both sides of the bottom of the shaft 3 are driven by the servo motor 2 to rotate, so that the two are fully fused and reacted. After high temperature treatment, a crystalline solid with a certain hardness under normal temperature and pressure can be obtained. Finally, the reaction product BYD can be discharged by pulling out the sealing plug 4 at the bottom of the reactor 1. During the reaction, the unreacted acetylene gas flows upward through the porous partition 8 and collects inside the defoaming chamber. The opening of the guide hood 91 decreases from bottom to top, which slows down the flow rate of the acetylene gas and causes it to collect at the center of the defoaming chamber. As the shaft 3 drives the rotation of the two sets of crushing rollers 93, the larger acetylene bubbles can be broken down into multiple smaller bubbles. Through the gravity settling of the broken bubbles and the adsorption effect of the formaldehyde solution film, the fine powder carried by the bubbles falls back into the reaction chamber. This prevents the catalyst powder from being carried away from the reaction zone in the form of bubbles along with the acetylene gas, thus avoiding the problem of the catalyst concentration in the reaction chamber gradually decreasing and eliminating the need for frequent catalyst replenishment. Acetylene, as the core raw material for BYD production, is recycled through a large bubble secondary reaction and acetylene recovery, which improves the overall utilization rate of acetylene. At the same time, the recovered formaldehyde (which falls back with the droplets) can be directly reused, reducing the consumption of formaldehyde per unit. Furthermore, acetylene is a flammable and explosive gas. In traditional processes, bubbles containing fine powder and droplets tend to accumulate in the pipeline, forming localized high-concentration acetylene areas. Additionally, the fine powder may generate static electricity (discharge caused by friction and impact). The above steps allow the acetylene gas to be fully broken up and separated in the defoaming chamber, resulting in extremely low droplet and fine powder content in the discharged gas. This leads to more uniform gas flow in the pipeline and reduces the risk of static electricity accumulation by more than 80%. At the same time, acetylene recovery efficiency is improved, and the venting volume is reduced. The gas remaining in the defoaming chamber after the acetylene gas has been reused can flow upward to the sponge 95 to separate the water vapor it carries. The valve 98 on the outer wall of the circulation pipe 96 is opened through the control panel 6, so that the small-sized acetylene gas after the bubble is broken can flow back into the interior of the reaction chamber along the circulation pipe 96 for secondary reaction and reuse. At this time, the valve 98 on the outer wall of the outlet pipe 97 is closed. Accordingly, after the entire reaction process is completed, the valve 98 on the outer wall of the circulation pipe 96 is closed, so that the residual gas mixture in the reaction process is output from the outlet pipe 97 to the corresponding collection and processing equipment.

[0025] It should be noted that the specific installation methods, circuit connection methods, and control methods of the reactor 1, servo motor 2, and valve 98 used in this invention are all conventional designs, and will not be described in detail here.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A BYD slurry bed reactor, comprising a reactor (1), characterized in that: A servo motor (2) is fixedly installed on the top of the reactor (1). A shaft (3) is fixedly connected to the drive end of the servo motor (2). A stirring paddle (5) is fixedly installed on both sides of the shaft (3) away from the servo motor (2). A sealing plug (4) is snapped into the center of the bottom of the reactor (1). A porous partition (8) is fixedly installed on the upper part of the inner wall of the reactor (1). The interior of the reactor (1) is divided into a reaction chamber and a defoaming chamber from bottom to top by the porous partition (8). The reaction chamber is equipped with a fusion reaction mechanism, and the defoaming chamber is equipped with a bubble elimination mechanism.

2. The BYD slurry bed reactor according to claim 1, characterized in that: The fusion reaction mechanism includes an air inlet pipe (71), the air outlets on both sides of the air inlet pipe (71) extend through and into the interior of the reactor (1), and a number of baffles (72) are evenly arranged around the inner wall of the reaction chamber.

3. A BYD slurry bed reactor according to claim 2, characterized in that: Liquid inlet pipes (73) are fixedly installed on both sides of the inside of the reaction chamber, and a grid frame (75) is fixedly installed in the middle of the inner wall of the reaction chamber. A main distribution component (74) is fixedly connected to the top of the grid frame (75).

4. A BYD slurry bed reactor according to claim 3, characterized in that: The bottom ends of the liquid inlet pipes (73) on both sides are fixedly connected to the inside of the main distribution component (74). The formaldehyde solution input by the liquid inlet pipes (73) on both sides is evenly distributed and covered inside the reaction chamber by the main distribution component (74) and the grid frame (75).

5. A BYD slurry bed reactor according to claim 1, characterized in that: The bubble elimination mechanism includes a flow guide (91), which is fixedly installed on the top of the porous partition (8). The opening of the flow guide (91) decreases from bottom to top, and a hollow plate (92) is fixedly connected to the top of the flow guide (91).

6. A BYD slurry bed reactor according to claim 5, characterized in that: A pair of crushing rollers (93) are fixedly connected to both sides of the inner section of the guide shroud (91) on the outer wall of the shaft (3). A collecting shroud (94) is fixedly connected to the inner wall of the defoaming chamber above the hollow plate (92). A sponge (95) is fixedly connected to the upper center of the collecting shroud (94).

7. A BYD slurry bed reactor according to claim 6, characterized in that: A circulation pipe (96) is installed inside the collection hood (94). The end of the circulation pipe (96) away from the collection hood (94) passes through the reactor (1) and extends into the interior of the reaction chamber. The interior of the defoaming chamber is located on the outer wall of the collection hood (94) and is fixedly connected to an outlet pipe (97). Valves (98) are fixedly installed on the outer walls of both the circulation pipe (96) and the outlet pipe (97).

8. A BYD slurry bed reactor according to claim 7, characterized in that: A control panel (6) is fixedly installed on the outer wall of the reactor (1), and the control panel (6) is electrically connected to the servo motor (2) and the valve (98).

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