Coal-to-methyl methacrylate production process and related equipment

Abstract

The application discloses a coal-to-methyl methacrylate production process and related equipment, and relates to the technical field of chemical production. The application comprises a filter seat for separating catalysts and reactants in a solution; a plurality of storage components are uniformly arranged at the bottom of the filter seat; when a command signal is sent by a monitoring sensor in a single storage component, a gas collecting box is disconnected from a pipe assembly sending the command signal and is connected to another pipe assembly; when the pipe assembly sending the command signal is disconnected from the gas collecting box, a storage dish falls into an isolation sleeve at the pipe assembly sending the command signal. The catalyst storage structure assembly prolongs the activation of catalysts. The catalyst storage structure assembly is designed to replace catalysts and to contain a plurality of catalyst storage containers. The catalysts in a reaction kettle are continuously supplemented through a timing structure switch to ensure the stability of the reaction rate.

Description

Technical Field

[0001] This invention relates to the field of chemical production technology, specifically to a coal-based methyl methacrylate production process and related equipment. Background Technology

[0002] Coal-derived methyl methacrylate (MMA) is an important chemical raw material produced from coal resources. It is an important raw material for the synthesis of polymethyl methacrylate (PMMA), which has the effect of reducing dependence on non-renewable resources such as petroleum and promoting the comprehensive utilization of coal resources. As a result, coal-derived MMA production processes and related equipment have emerged on the market.

[0003] A search revealed that Chinese invention patent with authorization announcement number "CN114195639B" discloses "a production process for long-chain alkyl methacrylates". In actual use, this process improves the production quality of alkyl methacrylates by controlling the proportion of raw materials.

[0004] However, in actual use, the above-mentioned production process is affected by factors such as high temperature, which causes the active component of the catalyst to grow. During this process, the activity decreases. In addition, a layer of carbon-containing compounds will be deposited on the surface of the catalyst during use. These carbon compounds will accelerate the deactivation of the catalyst. These two factors lead to a decrease in the reaction efficiency of methyl methacrylate production and a decrease in product yield. Therefore, the applicant proposes a new coal-to-methyl methacrylate production process and related equipment to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a coal-based methyl methacrylate production process and related equipment to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] In a first aspect, a catalyst storage structure assembly is used within a coal-to-methyl methacrylate production facility, comprising:

[0008] Filter holders are used to separate catalysts and reactants in a solution;

[0009] Several storage components are evenly installed at the bottom of the filter base for storing catalyst;

[0010] The conveying component is connected to several storage components to control the contact between the catalyst and the reactants in a single storage component via a solution.

[0011] The storage component includes:

[0012] The contact tube has one end fixed to the top of the filter base. The top of the contact tube is equipped with an insertion rod fixed to the top of the filter base. The contact tube has a notch for solution immersion at the end that contacts the filter base.

[0013] A storage dish is used to store the catalyst. The outer wall of the storage dish is slidably connected to the inner wall of the contact tube. A monitoring sensor for detecting the reaction rate of the catalyst and reactants is installed inside the storage dish. A sealing sleeve that can be penetrated by the insertion rod and can be replaced is installed on the top of the storage dish. When the reaction rate decreases, the monitoring sensor sends an instruction signal.

[0014] An isolation sleeve is installed at the end of the contact tube furthest from the filter base to seal the contact tube.

[0015] The conveying component includes:

[0016] The gas-gathering box is used to store gas and receive command signals. One end of the gas-gathering box is equipped with an injection pipe for connecting to a gas pump. The remaining parts of the gas-gathering box are equipped with pipe assemblies whose number and position match the storage component. The pipe assemblies are used to connect the gas-gathering box and the isolation sleeve.

[0017] When a command signal is issued from the monitoring sensor within a single storage component, the gas collection box disconnects from the tube assembly that issued the command signal and switches to another tube assembly. When the tube assembly that issued the signal disconnects from the gas collection box, the storage dish falls into the isolation sleeve at the tube assembly that issued the command signal.

[0018] As a further preferred embodiment of this technical solution, the pipe assembly includes:

[0019] A connecting pipe, one end of which is inserted and installed at the bottom of the isolation sleeve and connected to the inside of the contact pipe;

[0020] An electronic discharge valve and an electronic pressure relief valve are installed sequentially at the middle position of the outside of the connecting pipe. The electronic discharge valve is used to discharge the solution, and the electronic pressure relief valve is used to discharge the gas.

[0021] The other end of the connecting pipe is equipped with an intake manifold with an electronic valve, and the end of the intake manifold away from the connecting pipe is connected to the air-gathering box.

[0022] As a further preferred embodiment of this technical solution, the gas-gathering box has an annular box structure, and a controller is fixed at one end of the top of the gas-gathering box. The controller is electrically connected to the electronic discharge valve pipe, the electronic pressure relief valve, the electronic valve, the monitoring sensor, and the air pump.

[0023] As a further preferred embodiment of this technical solution, the filter base has several through-holes evenly distributed along its inner edge, and the top of the air-gathering box is fixed with several connecting rods that do not interfere with the controller.

[0024] Secondly, to improve the above technical solution, this application proposes a coal-to-methyl methacrylate equipment, comprising: a catalyst storage structure assembly, and further comprising: a vessel body structure assembly, a top cover structure assembly, and a temperature control structure assembly, wherein the vessel body structure assembly comprises:

[0025] The reactor sleeve has several through rods evenly fixed inside the middle, each through rod corresponding to an insertion port. The inner wall of the reactor sleeve fits into the outer wall of the filter seat. A sealing funnel is screwed to the bottom of the reactor sleeve, and an electronic drain valve is installed at the funnel opening.

[0026] As a further preferred embodiment of this technical solution, several mounting seats are uniformly fixed on the outside of the reactor sleeve near the top. A gas-phase feed pipe for supplementing gas is installed at the middle of the outside of the reactor sleeve. A control terminal for controlling the temperature control structure assembly, the catalyst storage structure assembly, and the electronic drain valve is installed between any two mounting seats on the reactor sleeve.

[0027] As a further preferred embodiment of this technical solution, the upper cover structure assembly includes:

[0028] A locking device is installed between the opening of the top cover and the end of the reactor sleeve away from the sealing funnel;

[0029] A stirring component is inserted and installed at the center point inside the upper cover to stir the reactants inside the vessel structure assembly. The input end of the stirring component is located at the top of the upper cover, and the output end of the stirring component acts inside the vessel structure assembly.

[0030] Two detection components are respectively installed on one side of the top of the upper cover and are used to detect the air pressure and temperature values ​​inside the vessel body assembly.

[0031] A guide tube is inserted and installed on the side of the top of the upper cover away from the detection component. One end of the guide tube extends to the funnel opening of the sealing funnel, and the other end is set outside the top of the upper cover and is equipped with an electric shut-off valve.

[0032] The material feed pipe is installed on the top of the upper cover, avoiding the position of the gas phase discharge pipe and the detection components, and is used to add reaction raw materials into the reactor body structure assembly.

[0033] As a further preferred embodiment of this technical solution, the temperature control structure assembly includes:

[0034] The jacket covers the bottom of the reactor vessel. A spiral tube is installed inside the jacket, and an electric heating wire is installed inside the tube. An injection pipe and an discharge pipe with different heights are installed on two opposite sides of the jacket. The height of the injection pipe is higher than the height of the discharge pipe.

[0035] The injection pipe, the serpentine pipe, and the discharge pipe are connected in sequence, and a heat exchanger is installed at the end of the injection pipe away from the jacket.

[0036] Thirdly, to further improve the above technical solution, this application also proposes a coal-to-methyl methacrylate production process, which is applied to the above-mentioned technical equipment and includes the following steps:

[0037] Step 1: Add the reaction raw materials into the reactor body assembly through the material feed pipe;

[0038] Step 2: Start the temperature control assembly via the control terminal to raise the temperature inside the vessel body to the specified temperature;

[0039] Step 3: Supplement gas into the reactor body assembly through the gas phase feed pipe, and simultaneously adjust the pressure inside the reactor body assembly through the electric shut-off valve;

[0040] Step 4: Ensure that the material and catalyst within the reactor assembly do not come into contact with each other using the filter seat;

[0041] Step 5: During the reaction, the monitoring sensor in the catalyst storage structure assembly sends a command signal, the gas collection box disconnects from the pipe assembly that sent the command signal, and switches to another pipe assembly.

[0042] Step 6: When connecting to another tube assembly, the tube assembly that sends the command signal releases pressure and drains liquid, causing the storage dish containing the catalyst to slide down from the contact tube at the point where the command signal was sent, and causing the storage dish in the other tube assembly to move upward. When the storage dish in the other tube assembly moves upward, the sealing sleeve is punctured by the insertion rod, and at this time the catalyst and material stored in the storage dish come into contact and react.

[0043] Step 7: During the reaction, the generated gas inside the reactor assembly is collected through the collection guide tube.

[0044] Step 8: After the reaction is complete, the temperature inside the reactor body is gradually reduced by the temperature control assembly, and the electronic drain valve is opened to discharge the residue.

[0045] Step 9: Remove the sealing funnel inside the reactor body structure assembly to separate the catalyst storage structure assembly. At this time, clean the reactor body structure assembly and the storage vessel, replenish the catalyst in the storage vessel, and reinstall the sealing sleeve to ensure the smooth progress of the next reaction.

[0046] Step 10: Repeat steps one through nine, adjusting the reaction conditions as needed to produce different batches of products.

[0047] Compared with the prior art, the beneficial effects of the present invention are:

[0048] The coal-to-methyl methacrylate production process and related equipment use a temperature control assembly to precisely control the reaction temperature. During production, precise temperature control and pressure regulation ensure the smooth progress of the reaction. At the same time, components such as filter seats and electronic valves ensure the stability of the reaction and the quality of the product.

[0049] Furthermore, by designing the catalyst storage structure assembly, this invention achieves precise separation and control of the catalyst and reactants, avoiding direct contact between the catalyst and reactants. This not only avoids catalyst waste but also allows for continuous catalyst replenishment, reducing the problem of overall reaction rate decline caused by catalyst deactivation.

[0050] Furthermore, in terms of production process, this invention achieves continuous reaction and automated control through reasonable step design. During the reaction process, the filter seat ensures the separation of materials and catalyst, reduces the generation of waste, and avoids catalyst waste and equipment blockage.

[0051] Next, after the reaction is completed, the temperature is gradually reduced through the temperature control structure assembly, which improves the service life and stability of the equipment, avoids the rapid cooling of the reactants, and ensures the stable operation of the equipment. In terms of equipment structure, the connecting pipe, electronic discharge valve pipe, electronic pressure relief valve and other components are improved to improve the overall reliability and durability of the equipment. In addition, the catalyst storage structure assembly is installed on the detachable sealing funnel at the bottom of the reactor sleeve, which provides convenience for the maintenance and upkeep of the device. Attached Figure Description

[0052] Figure 1 This is an isometric drawing of the present invention;

[0053] Figure 2 This is a main sectional view of the present invention;

[0054] Figure 3 This is a composition diagram of the vessel body structure assembly of the present invention;

[0055] Figure 4 This is a composition diagram of the upper cover structure assembly of the present invention;

[0056] Figure 5 This is a diagram showing the composition of the temperature control structure assembly of the present invention;

[0057] Figure 6 This is a compositional diagram of the catalyst storage structure assembly of the present invention;

[0058] Figure 7 This is a structural diagram of the storage component of the present invention;

[0059] Figure 8 This is an assembly diagram of the internal structure of the storage dish of the present invention.

[0060] In the diagram: 1. Reactor body assembly; 101. Control terminal; 102. Reactor sleeve; 103. Electronic drain valve; 104. Sealing funnel; 105. Insertion rod; 106. Assembly base; 2. Upper cover assembly; 201. Upper cover cover; 202. Frame; 203. Gas phase discharge pipe; 204. Electric shut-off valve; 205. Reducer; 206. Rotary motor; 207. Coupling; 208. Inspector; 209. Material feed pipe; 210. Locking device; 211. Shaft; 212. Sealing ring; 213. Agitator; 214. Threaded sleeve; 215. Guide pipe; 3. Temperature control. 4. Catalyst storage assembly; 301. Jacket; 302. Discharge pipe; 303. Coil; 304. Injection pipe; 4. Catalyst storage assembly; 401. Filter seat; 402. Insertion port; 403. Connecting rod; 404. Controller; 405. Gas injection pipe; 406. Gas collection box; 5. Pipe clamp; 6. Storage component; 601. Contact pipe; 602. Isolation sleeve; 603. Connecting pipe; 604. Electronic pressure relief valve; 605. Intake manifold; 606. Electronic discharge valve pipe; 607. Storage dish; 608. Insertion rod; 609. Monitoring sensor; 610. Sealing sleeve; 7. Gas phase feed pipe. Detailed Implementation

[0061] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] Currently, the process for preparing methyl methacrylate from coal is the isobutane oxidation method, and its operating steps are as follows: Step 1, Coal gasification: Carbon gasification reaction: C + H₂O → CO + H₂, Gasification reaction: C + CO₂ → 2CO; Step 2, Syngas purification: This includes: coarse purification, dust removal, desulfurization, denitrification, and carbon dioxide capture; Step 3, Methyl methacrylate generation: The purified syngas from Step 2 is converted into methyl methacrylate through a syngas conversion reaction under the action of a catalyst. This step can be carried out using Fischer-Tropsch synthesis or Meth... Step 4: Product purification: The obtained methyl methacrylate is purified by distillation, crystallization, adsorption or other separation techniques to remove impurities and unreacted raw materials; solvents, catalysts and other valuable by-products are recovered and recycled to reduce resource consumption and environmental impact; Step 5: Waste treatment: The generated wastewater, waste gas and solid waste are effectively treated and disposed of. It should be noted that Step 5 can use advanced waste treatment technologies, such as adsorption, desulfurization, denitrification, incineration or catalytic conversion, to ensure that waste emissions meet environmental standards.

[0063] As a specific implementation method, the equipment required for producing methyl methacrylate from coal includes: coal storage and feeding equipment: used to store coal and feed it according to production needs; gas compression and conveying equipment: in the syngas conversion reaction, gas compression and conveying equipment is needed to transport syngas to the reactor at a certain pressure and flow rate. This equipment should be efficient, low-consumption, and durable to reduce production costs; refrigeration and heating equipment: during the production process, refrigeration and heating equipment is needed to control the temperature of reactants and products to ensure the reaction proceeds and product quality. This equipment should be efficient, stable, and durable to reduce production costs and improve production efficiency; safety protection equipment: during the production process, safety protection equipment such as emergency braking systems, safety valves, and fire-fighting equipment is needed to ensure production safety. This equipment should be efficient, safe, and durable to reduce production risks. Coal gasification equipment: Used to convert coal into syngas, generally using fixed-bed gasifiers or fluidized-bed gasifiers. Syngas purification equipment: Includes devices for coarse purification, dust removal, desulfurization, denitrification, and carbon dioxide capture to remove impurities and harmful substances, obtaining pure syngas. Methyl methacrylate synthesis equipment: Includes syngas conversion reactors, catalyst beds, and product separators, used to convert syngas into methyl methacrylate. Product purification equipment: Includes distillation towers, crystallizers, and adsorption towers, used to purify the obtained methyl methacrylate, removing impurities and unreacted raw materials. Waste treatment equipment: Includes wastewater treatment devices, waste gas treatment devices, and solid waste treatment devices, used to treat waste generated during the production process, ensuring compliance with environmental protection requirements. Auxiliary equipment: Includes refrigeration units, heaters, pumps, valves, pipelines, etc., used to control parameters such as temperature, pressure, and flow rate during the production process, ensuring production stability and safety.

[0064] As a specific implementation method, it should be noted that the operating environment and status of these devices are as follows: Coal gasification equipment: typically operates in a high-temperature, high-pressure environment with water vapor. The coal in the equipment undergoes an oxidation reaction to produce syngas, releasing a large amount of heat energy. It operates continuously and requires regular maintenance and repair. Syngas purification equipment: typically operates at ambient temperature and pressure. The syngas in the equipment undergoes dust removal, desulfurization, denitrification, and carbon dioxide capture to remove impurities and harmful substances. It operates continuously and requires regular maintenance and repair. Methyl methacrylate synthesis equipment: typically operates in a high-temperature, high-pressure environment with a catalyst. The synthesis gas in the equipment reacts with methanol under the action of a catalyst to produce methyl methacrylate. The operation is intermittent or continuous, requiring regular maintenance and repair. The product purification equipment typically operates at ambient temperature and pressure. The methyl methacrylate in the equipment undergoes distillation, crystallization, and adsorption to remove impurities and unreacted raw materials. It also operates intermittently or continuously and requires regular maintenance and repair. The waste treatment equipment typically operates at ambient temperature and pressure. Wastewater, waste gas, and solid waste in the equipment are treated before being discharged or recycled. It also operates intermittently or continuously and requires regular maintenance and repair.

[0065] As one specific implementation method, auxiliary equipment not mentioned in this application includes chillers, heaters, pumps, valves, pipelines, and other auxiliary equipment, which typically operate at normal temperature and pressure. These devices are switched on, regulated, and operated according to the instructions of the control system to ensure that parameters such as temperature, pressure, and flow rate during the production process remain within specified ranges. The operation is intermittent or continuous, requiring regular maintenance and repair. Safety protection equipment, such as emergency braking systems, safety valves, and fire extinguishers, is required during production to ensure safety. This equipment should be kept in good condition and able to respond quickly and function effectively in emergencies.

[0066] As a specific implementation method, the specific apparatus proposed in this application is mainly an improved methyl methacrylate synthesis equipment.

[0067] refer to Figures 6-8 As can be seen, in the first aspect, the present invention provides a technical solution, a catalyst storage structure assembly 4, applied in a coal-to-methyl methacrylate production equipment, as referenced. Figures 6-8It is known that the catalyst storage structure assembly 4 includes: a filter seat 401 for separating the catalyst and reactants in the solution; several storage components 6, evenly installed at the bottom of the filter seat 401 for storing the catalyst; a conveying component connected to the several storage components 6 for controlling the catalyst in a single storage component 6 to contact the catalyst with the solution and reactants. As a specific embodiment, in this device, the catalyst is either iron oxide or calcium oxide, and the obtained products are carbon monoxide and hydrogen. The main raw materials fed in include coal, steam and catalyst.

[0068] refer to Figures 6-8 It is also known that in this application, the storage component 6 includes: a contact tube 601, one end of which is fixed to the top of the filter seat 401, and an insertion rod 608 fixed to the top of the filter seat 401 is provided at the top of the contact tube 601. The contact tube 601 has a notch for solution immersion at the end in contact with the filter seat 401; a storage dish 607 for storing the catalyst, the outer wall of the storage dish 607 is slidably connected to the inner wall of the contact tube 601, a monitoring sensor 609 for detecting the reaction rate of the catalyst and reactants is installed inside the storage dish 607, and a sealing sleeve 610 that can be penetrated by the insertion rod 608 and is replaceable is installed on the top of the storage dish 607. The monitoring sensor 609 issues a command signal when the reaction rate decreases; and an isolation sleeve 602, installed at the end of the contact tube 601 away from the filter seat 401, for sealing the contact tube 601. It should be noted that the sealing sleeve 610 is installed on top of the storage dish 607 by welding. When replacing it, it can be reused by re-welding with the same material.

[0069] In one specific embodiment, the conveying component in this application includes: a gas-gathering box 406 for storing gas and receiving command signals; an injection pipe 405 for connecting to a gas pump is installed at one end of the gas-gathering box 406; and pipe assemblies, the number and position of which match the storage component 6, are installed at other positions on the outside of the gas-gathering box 406. The pipe assemblies are used to connect the gas-gathering box 406 and the isolation sleeve 602.

[0070] It should be noted that when a command signal is issued by the monitoring sensor 609 in a single storage component 6, the gas collection box 406 disconnects from the tube assembly that issued the command signal and switches to another tube assembly. When the tube assembly that issued the signal disconnects from the gas collection box 406, the storage dish 607 falls into the isolation sleeve 602 at the tube assembly that issued the command signal.

[0071] It should be added that the detection principle of the monitoring sensor 609 in this application is to detect the carbon elements attached to the inner surface of the catalyst. When the carbon content increases, the monitoring sensor 609 sends a command signal. Due to the influence of high temperature and other factors, the active component grains of the catalyst will grow. During this process, the activity decreases. In addition, during use, a layer of carbon-containing compounds will be deposited on the surface of the catalyst. These carbon compounds will accelerate the deactivation of the catalyst. Therefore, detecting carbon elements can detect the activity of the catalyst to a certain extent.

[0072] As one specific implementation method, refer to Figures 6-8 As can be seen, the pipe assembly includes: a connecting pipe 603, one end of which is inserted into the bottom of the isolation sleeve 602 and connected to the interior of the contact pipe 601; an electronic discharge valve pipe 606 and an electronic pressure relief valve 604 are sequentially installed at the middle position of the outside of the connecting pipe 603. The electronic discharge valve pipe 606 is used to discharge the solution (i.e., a mixture of water vapor, coal, and catalyst), and the electronic pressure relief valve 604 is used to discharge the gas (gas filled by the gas pump). The other end of the connecting pipe 603 is equipped with an intake manifold 605 with an electronic valve. The end of the intake manifold 605 away from the connecting pipe 603 is connected to the gas-gathering box 406. The gas-gathering box 406 has an annular box structure. A controller 404 is fixed at one end of the top of the gas-gathering box 406. The controller 404 is electrically connected to the electronic discharge valve pipe 606, the electronic pressure relief valve 604, the electronic valve, the monitoring sensor 609, and the gas pump.

[0073] It should be added that, in this application, the inner edge of the filter seat 401 is evenly provided with several through holes 402, and the top of the air collection box 406 is fixed with several connecting rods 403 of the non-interference controller 404.

[0074] Secondly, to improve the above technical solution, the present invention provides a coal-to-methyl methacrylate apparatus, as described above. Figures 1-8 It is known that the equipment includes a catalyst storage structure assembly 4, as well as a vessel structure assembly 1, a top cover structure assembly 2, and a temperature control structure assembly 3;

[0075] The vessel body assembly 1 includes: a reactor sleeve 102, with several through rods 105 evenly fixed inside the middle of the reactor sleeve 102, each through rod 105 corresponding to an insertion port 402, the inner wall of the reactor sleeve 102 and the outer wall of the filter seat 401 being in contact, a sealing funnel 104 being screwed to the bottom of the reactor sleeve 102, and an electronic drain valve 103 being installed at the funnel opening of the sealing funnel 104.

[0076] In one specific implementation, several mounting seats 106 are uniformly fixed on the outside of the reactor sleeve 102 near the top. A gas-phase feed pipe 7 for supplementing gas is installed at the middle of the outside of the reactor sleeve 102. A control terminal 101 for controlling the electronic structure inside the temperature control structure assembly 3, the electronic structure inside the catalyst storage structure assembly 4, and the electronic drain valve 103 is installed between any two mounting seats 106 on the reactor sleeve 102.

[0077] As a specific implementation, it should be noted that the upper cover structure assembly 2 in this application includes: an upper cover 201, and a locking device 210 is installed between the opening of the upper cover 201 and the end of the reactor sleeve 102 away from the sealing funnel 104, such as... Figure 4 It can be seen that the locking device 210 is composed of a bolt and an arched buckle. The bolt passes through the edge of the upper cover 201, the inside of the buckle, and the top edge of the reactor sleeve 102, so that the bottom of the bolt extends out at the bottom of the buckle. The locking device 210 is installed by installing a nut at the bottom of the bolt. It should be emphasized that holes are opened on the top edges of both the upper cover 201 and the reactor sleeve 102. The stirring component is inserted and installed at the center point inside the upper cover 201 for stirring the reactants in the reactor body assembly 1. The input end of the stirring component is located at the top of the upper cover 201, and the output end of the stirring component acts on the reactor body assembly. The assembly 1 contains two detection components, namely gauges 208, which are respectively installed on one side of the top of the upper cover 201 and are used to detect the gas pressure and temperature values ​​inside the vessel structure assembly 1. A guide pipe 215 is inserted and installed on the top of the upper cover 201 away from the detection components. One end of the guide pipe 215 extends to the funnel opening of the sealing funnel 104, and the other end is located outside the top of the upper cover 201 and is equipped with an electric shut-off valve 204. A material feed pipe 209 is installed on the top of the upper cover 201, avoiding the guide pipe 215 and the detection components, and is used to add reaction raw materials into the vessel structure assembly 1. It should be noted that, according to reference... Figure 2 It can be seen that a pipe clamp 5 for stabilizing the guide pipe 215 is installed at the bottom of the inner wall of the reactor sleeve 102, and a gas phase discharge pipe 203 for protection is installed outside the guide pipe 215.

[0078] As one specific implementation method, refer to Figure 4As can be seen, the stirring component in this application includes: a rotary motor 206, a reducer 205, a coupling 207, a shaft 211, and a stirring paddle 213. It should be noted that the output end of the rotary motor 206 is connected to the input end of the reducer 205, the output end of the reducer 205 is connected to one end of the coupling 207, and the other end of the coupling 207 is connected to the shaft 211. It should be noted that there are two stirring paddles 213, which are respectively installed at the bottom and middle of the shaft 211. It should be emphasized that, in order to enhance the stability of the stirring component, a frame 202 is installed outside the stirring component, and the reducer 205 is fixed to the top of the frame 202.

[0079] In one specific implementation, a threaded sleeve 214 is installed on the top of the stirring paddle 213 located at the top of the shaft 211, and a thread is provided at the bottom of the shaft 211. The shaft 211 is adapted to the threaded sleeve 214 by means of the thread. In addition, it should be further explained that a sealing ring 212 is fixed between the two stirring paddles 213 on the shaft 211. The sealing ring 212 is used to seal the gap between the shaft 211 and the filter seat 401.

[0080] As one specific implementation method, refer to Figure 5 As can be seen, in this application, the temperature control structure assembly 3 includes: a jacket 301, which covers the bottom of the reactor sleeve 102. A spiral coil 303 is installed inside the jacket 301. An electric heating wire is installed inside the coil 303. An injection pipe 304 and an exhaust pipe 302 with different heights are installed on two opposite sides of the jacket 301. The height of the injection pipe 304 is higher than the height of the exhaust pipe 302. The injection pipe 304, the coil 303, and the exhaust pipe 302 are connected in sequence. A heat exchanger is installed at the end of the injection pipe 304 away from the jacket 301. Hot or cold gas is filled into the injection pipe 304 through the heat exchanger to complete the heating and cooling of the reactor structure assembly 1. The electric heating wire operates when hot gas is filled into the coil 303. It should be noted that a temperature sensor is installed inside the coil 303. The temperature sensor and the electric heating wire are electrically connected.

[0081] Thirdly, to further improve the above technical solution, this invention also proposes a coal-based methyl methacrylate production process (working principle), which includes the following steps:

[0082] Step 1: Add the reaction raw materials into the reactor body assembly 1 through the material feed pipe 209;

[0083] Step 2: Start the temperature control structure assembly 3 through the control terminal 101 to raise the temperature inside the vessel structure assembly 1 to the specified temperature;

[0084] Step 3: Gas is supplied to the reactor body assembly 1 through the gas phase feed pipe 7, and the pressure inside the reactor body assembly 1 is adjusted through the electric shut-off valve 204.

[0085] Step 4: Ensure that the material and catalyst inside the reactor body assembly 1 do not come into contact with each other through the filter seat 401;

[0086] Step 5: During the reaction, the monitoring sensor 609 in the catalyst storage structure assembly 4 sends a command signal, the gas collection box 406 disconnects from the pipe assembly that sent the command signal, and switches to another pipe assembly.

[0087] Step 6: When connected to another tube assembly, the tube assembly that sends the command signal releases pressure and drains liquid, causing the storage dish 607 containing the catalyst to slide down from the contact tube 601 where the command signal was sent, and causing the storage dish 607 in the other tube assembly to move upward. When the storage dish 607 in the other tube assembly moves upward, the sealing sleeve 610 is punctured by the insertion puncture rod 608, at which point the catalyst and material stored in the storage dish 607 come into contact and react.

[0088] Step 7: During the reaction, the product gas generated in the vessel structure assembly 1 is collected through the collection guide pipe 215.

[0089] Step 8: After the reaction is completed, the temperature inside the vessel structure assembly 1 is gradually reduced by the temperature control structure assembly 3, and the electronic drain valve 103 is opened to discharge the residue.

[0090] Step 9: Remove the sealing funnel 104 inside the reactor body structure assembly 1, so that the catalyst storage structure assembly 4 can be separated together. At this time, clean the reactor body structure assembly 1 and the storage dish 607, replenish the catalyst in the storage dish 607 and reinstall the sealing sleeve 610 to ensure the smooth progress of the next reaction.

[0091] Step 10: Repeat steps one through nine, adjusting the reaction conditions as needed to produce different batches of products.

[0092] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A catalyst storage structure assembly, used in a coal-to-methyl methacrylate production equipment, characterized in that, include: Filter holder (401) is used to separate catalyst and reactants in solution; Several storage components (6) are evenly installed at the bottom of the filter base (401) for storing catalyst; The conveying component is connected to several storage components (6) for controlling the contact between the catalyst and the reactant phase in a single storage component (6) via a solution; The storage component (6) includes: The contact tube (601) is fixed at one end to the top of the filter seat (401). The top end of the contact tube (601) is provided with an insertion rod (608) fixed to the top of the filter seat (401). The contact tube (601) has a notch for solution immersion at the end that contacts the filter seat (401). A storage dish (607) is used to store the catalyst. The outer wall of the storage dish (607) and the inner wall of the contact tube (601) are slidably connected. A monitoring sensor (609) for detecting the reaction rate of the catalyst and reactants is installed inside the storage dish (607). A sealing sleeve (610) that can be penetrated by a through-hole rod (608) and can be replaced is installed on the top of the storage dish (607). The monitoring sensor (609) sends an instruction signal when the reaction rate decreases. An isolation sleeve (602) is installed at the end of the contact tube (601) away from the filter seat (401) to seal the contact tube (601); The conveying component includes: The gas-gathering box (406) is used to store gas and receive command signals. One end of the gas-gathering box (406) is equipped with an injection pipe (405) for connecting to the gas pump. The remaining positions on the outside of the gas-gathering box (406) are equipped with pipe assemblies whose number and position match the storage component (6). The pipe assemblies are used to connect the gas-gathering box (406) and the isolation sleeve (602). When a command signal is issued by the monitoring sensor (609) in a single storage component (6), the gas collection box (406) disconnects from the tube assembly that issued the command signal and switches to another tube assembly. When the tube assembly that issued the signal disconnects from the gas collection box (406), the storage dish (607) falls into the isolation sleeve (602) at the tube assembly that issued the command signal.

2. The catalyst storage structure assembly according to claim 1, characterized in that: The tubular assembly includes: A connecting pipe (603) is inserted into the bottom of the isolation sleeve (602) and connected to the inside of the contact pipe (601); An electronic discharge valve (606) and an electronic pressure relief valve (604) are sequentially installed at the middle position outside the connecting pipe (603). The electronic discharge valve (606) is used to discharge the solution, and the electronic pressure relief valve (604) is used to discharge the gas. The other end of the connecting pipe (603) is equipped with an intake manifold (605) with an electronic valve. The end of the intake manifold (605) away from the connecting pipe (603) is connected to the air collection box (406).

3. The catalyst storage structure assembly according to claim 2, characterized in that: The gas-gathering box (406) has an annular box structure. A controller (404) is fixed at one end of the top of the gas-gathering box (406). The controller (404) is electrically connected to the electronic discharge valve pipe (606), the electronic pressure relief valve (604), the electronic valve, the monitoring sensor (609), and the air pump.

4. The catalyst storage structure assembly according to claim 3, characterized in that: The filter base (401) has several through holes (402) evenly distributed on its inner edge, and the top of the air-gathering box (406) is fixed with several connecting rods (403) that do not interfere with the controller (404).

5. A coal-to-methyl methacrylate apparatus, comprising the catalyst storage assembly of any one of claims 1-4, and further comprising: The vessel body assembly (1), the upper cover assembly (2), and the temperature control assembly (3) are characterized in that: The vessel body assembly (1) includes: The reactor sleeve (102) has several through rods (105) evenly fixed in the middle of its interior. Each through rod (105) is adapted to an insertion port (402). The inner wall of the reactor sleeve (102) is in contact with the outer wall of the filter seat (401). A sealing funnel (104) is screwed to the bottom of the reactor sleeve (102). An electronic drain valve (103) is installed at the funnel opening of the sealing funnel (104).

6. The coal-to-methyl methacrylate equipment according to claim 5, characterized in that: Several mounting seats (106) are evenly fixed on the outside of the reactor sleeve (102) near the top. A gas phase feed pipe (7) for supplementing gas is installed at the middle of the outside of the reactor sleeve (102). A control terminal (101) for controlling the temperature control structure assembly (3), the catalyst storage structure assembly and the electronic drain valve (103) is installed between any two mounting seats (106) of the reactor sleeve (102).

7. The coal-to-methyl methacrylate equipment according to claim 5, characterized in that: The upper cover structure assembly (2) includes: A locking device (210) is installed between the opening of the cover (201) and the end of the reactor sleeve (102) away from the sealing funnel (104); A stirring component is inserted and installed at the center point inside the upper cover (201) to stir the reactants in the vessel structure assembly (1). The input end of the stirring component is located at the top of the upper cover (201), and the output end of the stirring component acts inside the vessel structure assembly (1). Two detection components are respectively installed on one side of the top of the upper cover (201) and are used to detect the air pressure and temperature values ​​inside the vessel body structure assembly (1); A guide tube (215) is inserted and installed on the top of the upper cover (201) away from the detection component. One end of the guide tube (215) extends to the funnel opening of the sealing funnel (104), and the other end is set outside the top of the upper cover (201) and is equipped with an electric shut-off valve (204). The material feed pipe (209) is installed on the top of the cover (201) away from the gas phase discharge pipe (203) and the position of the detection component, and is used to add reaction raw materials into the reactor body assembly (1).

8. The coal-to-methyl methacrylate equipment according to claim 5, characterized in that: The temperature control structure assembly (3) includes: A jacket (301) covers the bottom of the reactor sleeve (102). A spiral tube (303) is installed inside the jacket (301). An electric heating wire is installed inside the tube (303). An injection pipe (304) and an discharge pipe (302) with different heights are installed on two opposite sides of the jacket (301). The height of the injection pipe (304) is higher than the height of the discharge pipe (302). The injection pipe (304), the serpentine pipe (303), and the discharge pipe (302) are connected in sequence. The end of the injection pipe (304) away from the jacket (301) is used to install a heat exchanger.

9. A coal-to-methyl methacrylate production process, using any one of the coal-to-methyl methacrylate equipment according to claims 5-8, characterized in that, Includes the following steps: Step 1: Add the reaction raw materials into the reactor body assembly (1) through the material feed pipe (209); Step 2: Start the temperature control structure assembly (3) through the control terminal (101) to raise the temperature inside the vessel structure assembly (1) to the specified temperature; Step 3: Gas is supplied to the reactor body assembly (1) through the gas phase feed pipe (7), and the pressure inside the reactor body assembly (1) is adjusted by the electric shut-off valve (204). Step 4: Ensure that the material and catalyst inside the reactor structure assembly (1) do not come into contact with each other through the filter seat (401); Step 5: During the reaction, the monitoring sensor (609) in the catalyst storage structure assembly (4) sends a command signal, the gas collection box (406) disconnects from the pipe assembly that sent the command signal, and switches to another pipe assembly; Step 6: When connected to another tube assembly, the tube assembly that sends the command signal releases pressure and drains liquid, causing the storage dish (607) containing the catalyst to slide down from the contact tube (601) where the command signal was sent, and causing the storage dish (607) in the other tube assembly to move upward. When the storage dish (607) in the other tube assembly moves upward, the sealing sleeve (610) is punctured by the insertion puncture rod (608), and at this time the catalyst and material stored in the storage dish (607) come into contact and react. Step 7: During the reaction, the generated gas inside the vessel structure assembly (1) is collected through the collection guide pipe (215); Step 8: After the reaction is completed, the temperature inside the reactor body assembly (1) is gradually reduced by the temperature control structure assembly (3), and the electronic drain valve (103) is opened to discharge the residue. Step 9: Remove the sealing funnel (104) inside the reactor body structure assembly (1) to separate the catalyst storage structure assembly (4). At this time, clean the reactor body structure assembly (1) and the storage dish (607), replenish the catalyst in the storage dish (607) and reinstall the sealing sleeve (610) to ensure the smooth progress of the next reaction. Step 10: Repeat steps one through nine, adjusting the reaction conditions as needed to produce different batches of products.

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