51results about "Pressure vessel components" patented technology

The invention relates to the technical field of manufacturing of fusible polytetrafluoroethylene resin, in particular to a method for treating an unstable terminal group of fusible polytetrafluoroethylene, which is used for solving the problem that the unstable terminal group cannot be thoroughly treated in the prior art. The method comprises the following steps: heating fusible polytetrafluoroethylene resin to a molten state, after self-reaction, introducing high-purity fluorine-nitrogen mixed gas to carry out fluoridation reaction, and extracting impurities generated by the reaction to obtain unstable soluble polytetrafluoroethylene resin with a treated terminal group; according to the method, soluble polytetrafluoroethylene resin is heated to a molten state, and unstable terminal groups are thoroughly treated through self-reaction and fluorination reaction.

This invention discloses a high-pressure reactor with adjustable baffles, which includes a reactor body, several baffle components and stirring components. The baffle components are evenly spaced along the length of the reactor body and arranged inside the reactor body to divide the interior cavity of the reactor body into several isolated chambers. Each baffle component includes a fixed baffle, a movable baffle, and a lifting drive mechanism. The stirring components are respectively set in each of the isolated chambers. The beneficial effect of this invention is that during stirring, the first through-slot is staggered with the second through-slot to enhance the blocking effect on the material, thereby improving the stirring effect and the pressure leaching efficiency. After stirring is completed, the movable baffle is driven by the lifting drive mechanism to move and align the first through-slot with the second through-slot, allowing the material to quickly enter the next isolated chamber. Thus, this device can improve the blocking effect of the baffles on the material, enhance the stirring effect, and increase the pressure leaching efficiency without affecting production efficiency.

This application provides a steam energy-saving system for an autoclave, including an automatic steam distribution and reversing device, a heat energy utilization device, a condensate drain device, and a control cabinet. The automatic steam distribution and reversing device includes an autoclave, an autoclave inlet steam distribution cylinder, and an autoclave reversing steam distribution cylinder. Both the autoclave inlet steam distribution cylinder and the autoclave reversing steam distribution cylinder are equipped with regulating valves, which are connected to the autoclave. The heat energy utilization device includes a heat exchanger, one end of which is connected to a main condensate pipe, and the other end is connected to a soft water station. The condensate drain device is located at the bottom of the autoclave and is connected to the heat exchanger via the main condensate pipe. The control cabinet is electrically connected to both the automatic steam distribution and reversing device and the condensate drain device. This application features a simpler structure, fully automated processing, reduced labor costs, higher safety, and greater energy efficiency and environmental friendliness, saving at least 15% of steam.

The application discloses a gas parameter adjusting method for a reaction kettle and belongs to the field of high-temperature and high-pressure equipment control. The gas parameter adjusting method for the reaction kettle adjusts and controls the gas temperature and pressure in the control kettle and the reaction kettle through adjusting the gas booster and the heating belt, realizes two-stage accurate regulation and control of the gas temperature, pressure, concentration and other parameters before and after entering the kettle and real-time dynamic supplement, guarantees high consistency between the test working condition in the kettle and the field working condition; on the other hand, the application solves the problem that the gas composition and the proportioning accuracy in the reaction kettle are reduced due to the fact that the mixed gas formed by the reaction medium solution volatilization and the reaction gas under the simulated actual working condition cannot be realized in real time and accurately during the reaction gas proportioning process, thereby guaranteeing the high consistency between the test environment in the reaction kettle and the actual working condition and the reliability of the test result, and significantly improving the safety.

The invention discloses an energy-saving and consumption-reducing system and method based on an alkoxylation device.The system comprises a pretreatment kettle, the discharging end of the bottom of the pretreatment kettle is communicated with the top of the pretreatment kettle sequentially through a pretreatment kettle outer circulating pump and a pretreatment kettle outer circulating heater, and the discharging end of the pretreatment kettle outer circulating pump is further communicated with a reaction kettle; the bottom discharge end of the reaction kettle is sequentially communicated with a reaction kettle circulating pump and a reaction kettle circulating heat exchanger, the discharge end of the reaction kettle circulating heat exchanger is respectively communicated with the reaction kettle and a gas-liquid mixer, and the discharge end of the reaction kettle circulating heat exchanger is also communicated with a reaction heat recovery system; the discharging end of the reaction kettle circulating pump is also communicated with the feeding end of a post-treatment kettle, and the bottom of the post-treatment kettle is provided with a discharging end; the method comprises the steps of pretreatment, alkylation reaction, aftertreatment and tail gas washing. According to the scheme, the energy-saving and consumption-reducing effects are remarkable.

The invention discloses a mineralization kettle external circulation distribution pipeline which comprises a main air inlet pipeline connected with an air inlet of a pressure-bearing fan and a main air outlet pipeline connected with an air outlet of the pressure-bearing fan, first-stage balance branch pipes are connected to the lower portion of the main air inlet pipeline or the main air outlet pipeline, and second-stage balance branch pipes are connected to the two ends of each first-stage balance branch pipe. The two ends of the second-stage balance branch pipe are connected with third-stage balance branch pipes, and the third-stage balance branch pipes are connected to a carbon dioxide diffuser in the mineralization kettle. The carbon dioxide diffusers are arranged in the mineralization kettle, so that the pressure, the flow speed and the flow of carbon dioxide in the multiple carbon dioxide diffusers in the mineralization kettle are equal, and the carbon dioxide uniformly circulates on the surface of the mineral substance at a certain speed in a turbulent flow manner. By arranging the main pipeline, the balance branch pipe and the carbon dioxide diffuser, uniform circulating flow of carbon dioxide in the mineralization kettle is realized, and rapid mass transfer homogenization of mineralization reaction is realized.

The invention relates to the technical field of solid waste resource utilization and adsorption material preparation, in particular to a process system for subcritical hydrothermal preparation of an activated carbon-zeolite composite molecular sieve from fly ash. The process system comprises a raw material pretreatment unit, a homogenizing and blending unit, a pressurization and heat compensation device, a subcritical hydrothermal reaction device, a heat recovery and pressure regulation device, a pressure self-driven separation device, a purification and drying device, an inorganic salt separation device and a wastewater neutralization unit. The fly ash is used as a raw material, the subcritical hydrothermal reaction device is combined with the characteristics of subcritical water and the synergistic effect of an oxidizing agent, conversion of silicon-aluminum components in the fly ash into zeolite and in-situ activation of carbon residues into activated carbon are synchronously achieved, and the problems that in the technology for preparing the zeolite molecular sieve from the fly ash, carbon residue resources are wasted, the waste liquid generation amount is large, and the cost is low are solved. The treatment cost is high; and the reaction energy consumption is high.

The invention provides a stirring system for an ultrahigh pressure reactor. The invention also provides an ultrahigh pressure reaction optimization method. The stirring system for the ultrahigh-pressure reactor provided by the invention can be used in the ultrahigh-pressure reactor with the operating pressure exceeding 100MPa, ethylene, acrylic acid, butyl acrylate, methyl acrylate, ethyl acrylate, methyl methacrylate or vinyl acetate are used as raw materials, and the problems of mechanical sealing and structural strength under ultrahigh pressure are solved; and the reaction process is optimized through active fluid control, so that the aims of high conversion rate, low energy consumption and zero accident are fulfilled finally.

Disclosed herein are systems that include a customized treatment fluid created in an exterior reactor which is delivered into a cased well, then into the heap or pile to open or stimulate new horizontal and vertical fluid pathways or channels thereby creating a second reactor in the interior of the heap or pile. One or more reagents can undergo physical changes, chemical, catalytical, biochemical, and / or biological reactions when added, mixed, and pressurized in the exterior reactor to make the treatment fluid. These mixed and pressurized treatment fluids are introduced into the heap or pile, to change one or more of the physical, biological, microbiological, or chemical conditions of the pile in an internal pressurized second reactor to improve metal recovery or change the target material in the pile.

The invention relates to a low-vacuum online graphitization system for 14C helium protection atmosphere determination by accelerator mass spectrometry, which belongs to the field of preparation of 14C graphite determination by AMS, and comprises a He source and purification assembly, a sample injection and combustion assembly, a gas flow rate adjusting and monitoring assembly, a CO2 chemical purification assembly, a CO2 physical purification trapping and graphitization assembly and a vacuum degree control assembly. The He source and purification assembly provides ultra-pure He gas as pipeline purge gas, carrier gas and graphitization shielding gas. The sample injection and combustion assembly efficiently and thoroughly converts solid organic carbon into CO2 gas. The gas flow rate adjusting and monitoring assembly adjusts and monitors the pipeline gas flow rate. And the CO2 chemical purification assembly is used for removing water vapor in the mixed gas. CO2 is further purified and graphitized by the CO2 physical purification and capture and graphitization assembly. The vacuum degree control assembly adjusts the flow rate of the purge gas and controls the internal pressure of the reduction unit. According to the invention, the carbon element in the solid sample can be efficiently converted into graphite with high quality.

A hydrate solid synthesis device and hydrate synthesis storage integrated device belong to the field of natural gas storage and transportation. In order to solve the problem that the natural gas supply needs to be interrupted when the existing single-chamber hydrate solid synthesis device is cleaned, the key point is a hydrate synthesis system for synthesizing natural gas into hydrate. The hydrate synthesis system includes a shell, a hydrate synthesis chamber is formed by the shell, the shell of the hydrate synthesis chamber is provided with a discharge port, a scraper is arranged in the hydrate synthesis chamber, the scraper is configured to move in the hydrate synthesis chamber, the inner shell of the hydrate synthesis chamber is scraped by the moving scraper, and the hydrate in the chamber space passed by the scraper is pushed to the discharge port by the movement of the scraper. The effect is that the natural gas is solid-state treated, the hydrate generated in the hydrate synthesis chamber is fully cleaned out of the chamber by the movement of the scraper.

Disclosed is a system and method for regulating aluminum precipitation during high-pressure acid leaching of laterite nickel ore, the system comprises an autoclave, a subsequent processing equipment, and a control device; the autoclave comprises a kettle body, a first feeding pipe, a second feeding pipe, and a discharge pipe, the subsequent processing equipment is connected to the discharge pipe and is used to process the reactants; the control device comprises a first valve, a second valve, a first pressure sensor, a second pressure sensor, an aluminum ion detection device, and a control unit. This disclosure can maintain the aluminum ion concentration in the leachate within an appropriate range, effectively reducing fluctuations in the production process, achieving stable production, and lowering production and maintenance costs.

The present disclosure provides a pressure control valve, in particular for use in a urea-producing plant. The present disclosure also provides a urea-producing plant comprising one or more pressure control valves, and the use of a pressure control valve in a urea-producing plant.

A high-temperature atomization hydrolysis system with a pressure relief device is suitable for being matched with a temperature control device and an air sewage treatment device to jointly conduct hydrolysis operation and comprises a hydrolysis furnace and the pressure relief device. The hydrolysis furnace defines a reaction space and an exhaust hole communicated with the reaction space. The pressure relief device comprises a pressure relief pipe and at least one auxiliary pipe, the pressure relief pipe extends in the vertical direction and is communicated with the exhaust hole, the auxiliary pipe is arranged on the side, away from the hydrolysis furnace, of the pressure relief pipe, and the auxiliary pipe extends in the radial direction of the pressure relief pipe and is communicated with the exhaust hole. By arranging the pressure relief device, a proper buffer distance is provided during pressure relief operation, so that a large amount of by-products generated in hydrolysis operation are prevented from overflowing to the air sewage treatment device, and the load capacity of the air sewage treatment device is reduced.

The invention belongs to the technical field of reaction kettles, particularly relates to a far infrared heating and heat preservation integrated assembly and method for an ultrahigh pressure reaction kettle, and aims to solve the problems that an existing heating mode is low in efficiency, insufficient in temperature uniformity and not easy to control the cooling speed. The reaction kettle and the stirring shaft are driven by an external stirring structure to rotate relatively, so that high-viscosity raw materials in the kettle are uniformly turned over, an independent far infrared heating unit divided into an upper section, a middle section and a lower section is arranged outside the reaction kettle, and vertical holes and corrugated holes are respectively formed in the upper heating section, the middle heating section and the heat preservation layer. Opening and closing of the through holes are controlled through the rotatable sealing ring, so that in the cooling stage, the gradient cooling speed is formed through air natural convection, and the assembly is mainly used for providing efficient and uniform heating and controllable heat preservation cooling for the reaction kettle under the ultrahigh pressure condition.

The application provides a supercritical reaction device with external circulation for methanol degradation of polyethylene terephthalate and a reaction method, which comprises a high-pressure reaction kettle, a circulating pump and a heater. A PET feeding port, a circulating flow outlet, a steam condensate outlet and a steam inlet are arranged on a reaction cylinder body of the high-pressure reaction kettle, and a flow guide cylinder coaxial with the cylindrical cylinder body, a spiral coil and a circulating flow jet inlet are arranged in the reaction cylinder body; the circulating flow outlet at the bottom of the high-pressure reaction kettle is connected with the inlet of the circulating pump, the outlet of the circulating pump is connected with the inlet of the heater, the outlet of the heater is connected with the circulating flow inlet in the high-pressure reaction kettle, meanwhile, the inlet of the circulating pump is provided with a methanol inlet, and the outlet of the circulating pump is provided with a reaction product outlet. The supercritical reaction device with external circulation for methanol degradation of polyethylene terephthalate has the characteristics of simple reactor structure, high production efficiency and good economic benefit.

The invention discloses a method and a device for synthesizing lithium sulfide with a controllable particle size. The method comprises the following steps: S1, dissolving lithium sulfide; performing evaporation concentration and low-temperature drying to obtain a lithium hydrosulfide powder raw material; s2, introducing high-purity hydrogen sulfide gas into a crushing and mixing chamber, and further crushing and fully mixing under strong impact of high-speed jet flow; s3, performing vulcanization reaction through the fluidized bed reaction chamber to obtain high-purity lithium sulfide particles; and S4, after synthesis is completed, transferring into a glove box. Compared with the prior art, the method disclosed by the invention has the advantages that the ethanol is adopted as a solvent, the uniformity of a lithium sulfide initial blank shell can be ensured to the greatest extent through a recrystallization method, and the high-quality lithium sulfide with controllable particle size can be obtained more quickly by accurately controlling the pressure of high-speed jet flow and regulating and controlling the particle size of a precursor material through the crushing and mixing chamber; the purity is higher, the particle size distribution is more uniform, the operation process is simple, convenient and feasible, and the method is suitable for large-scale industrial production.

This invention discloses a stabilization system for a high-pressure reactor for laterite nickel ore, which includes a reactor body, a vibration detection mechanism, and a vibration reduction mechanism. The vibration detection mechanism is installed on both sides of the reactor body in the width direction and is used to detect the vibration direction of the reactor body in the width direction. The vibration reduction mechanism includes two baffle plates and an acid spray assembly. The acid spray assembly consists of a pumping unit, two first adjustment valves, and two first nozzles. The beneficial effect of this invention is that, during use, the vibration detection mechanism detects the real-time vibration direction of the reactor body in the width direction. When the reactor body vibrates towards one side, the first adjustment valve on the opposite side is opened, causing the first nozzles on the opposite side to spray acid solution and impact the baffle plate on the corresponding side.

The invention discloses a method for preparing an aromatic aldehyde compound mainly containing vanillin by catalyzing high-selectivity oxidative depolymerization of lignin through a continuous high-pressure reaction system, which comprises the following steps: adopting a screw-type continuous reactor and one catalyst of copper chloride, ferric chloride, nickel chloride, manganese chloride and cobalt chloride, and controlling proper material retention time; the aldehyde product selectivity is excellent and is far superior to the aldehyde selectivity level of the traditional batch reaction, and the problems of uncontrollable product distribution and low target product proportion in the traditional technology are effectively solved.

The invention discloses an ultra-fast thermal injection hydrothermal synthesis device and a preparation method of a barite oxygen isotope standard substance, and belongs to the technical field of chemical reaction engineering. The hydrothermal synthesis device comprises a gas supercharger, a normal-temperature high-pressure kettle, a high-temperature high-pressure kettle, a first stop valve and a second stop valve. The preparation method of the barite oxygen isotope standard substance comprises the following steps: putting a barium chloride aqueous solution into a normal-temperature high-pressure kettle, and adding a sodium sulfate aqueous solution into the high-temperature high-pressure kettle; closing the second stop valve, opening the first stop valve, and heating the high-temperature high-pressure kettle; high-purity argon is injected into the normal-temperature high-pressure kettle to 20-50 MPa, the first stop valve is closed, the second stop valve is opened, the barium chloride solution is rapidly injected into the high-temperature high-pressure kettle, and the barite oxygen isotope standard substance is obtained after the reaction is conducted for 12 h. A pure water phase system is adopted, the problem of surface pollution caused by using an organic solvent and a surfactant in a traditional hot injection method is thoroughly avoided, and the obtained nano powder is high in purity.

The present application relates to a method for preparing cycloalkane liquid fuel by hydrodeoxygenation of lignin phenolic derivatives, which adopts a catalyst abbreviated as MN / S, wherein N is an additive, M is an active metal, S is a catalyst carrier hydroxyapatite (HAP), and M is loaded on the carrier, wherein the additive N is dispersed in the form of single-atom dispersion on the surface of the active metal M particles, the additive N is one or more of the following noble metals: Pt, Pd, Rh, Ru, Au, etc., and M is one or more of the following non-noble metals: Co, Ni. The single-atom catalyst not only greatly reduces the amount of noble metal, reduces the cost, and achieves 100% atom utilization rate, but also has excellent stability and selectivity. The method provides a way to mass-produce cycloalkane liquid fuel from non-fossil sources, has good application prospects, and is conducive to achieving the strategic goal of "carbon peak and carbon neutralization".

Disclosed is a system and method for regulating aluminum precipitation during high-pressure acid leaching of laterite nickel ore, the system comprises an autoclave, a subsequent processing equipment, and a control device; the autoclave comprises a kettle body, a first feeding pipe, a second feeding pipe, and a discharge pipe, the subsequent processing equipment is connected to the discharge pipe and is used to process the reactants; the control device comprises a first valve, a second valve, a first pressure sensor, a second pressure sensor, an aluminum ion detection device, and a control unit. This disclosure can maintain the aluminum ion concentration in the leachate within an appropriate range, effectively reducing fluctuations in the production process, achieving stable production, and lowering production and maintenance costs.

The invention discloses a fusion reactor tungsten-based dust tritium removal device, and relates to the technical field of nuclear fusion, tungsten-based dust is preheated and degassed by a preheating degassing vacuum chamber, the tungsten-based dust is smelted into tungsten-based liquid by a smelting vacuum chamber, and the tungsten-based liquid is cooled into solid by a cooling vacuum chamber; the common manifold is communicated with the vacuum extraction mechanism, the preheating and degassing vacuum chamber, the smelting vacuum chamber and the cooling vacuum chamber, so that the vacuum extraction mechanism extracts gas in the preheating and degassing vacuum chamber, extracts gas in the smelting vacuum chamber and extracts gas in the cooling vacuum chamber; the vacuum extraction mechanism is used for communicating with the recovery mechanism to enable extracted gas to flow into the recovery mechanism, the detection mechanism is used for detecting tritium parameters of gas flowing to the vacuum extraction mechanism in the public manifold, and the controller is configured to control the preheating degassing vacuum chamber and the smelting vacuum chamber to work according to the tritium parameters. Therefore, leakage risks and potential safety hazards of tritium and radioactive activation products can be reduced.

The disclosure pertains in certain embodiments to a plant and to urea production in a plant comprising a valve body comprising an inner body part and an outer body part.

This invention relates to the field of chemical production technology and discloses an apparatus and method for the large-scale production of boron nitride nanomaterials. The apparatus includes a vacuum chamber, a cooling water circulation system, a vacuum pumping system, an exhaust system, a gas path, an automatic stirring device, a material reaction container, and a heating device. The automatic stirring device controls the mixing and stirring of the materials. The material reaction container is connected to multiple evenly distributed air inlets. The heating device surrounds the material reaction container and controls the reaction temperature. This invention improves the thermal treatment effect and chemical reaction efficiency of the raw materials in the gas by equipping the material reaction container with an automatic stirring device and multiple densely distributed air inlets, effectively increasing the quality and quantity of materials processed per batch and improving the production efficiency of boron nitride nanomaterials. The apparatus is simple, has low manufacturing cost, and is easy to scale up; the production method is simple, energy-efficient, and pollution-free, meeting the needs of large-scale preparation of boron nitride nanomaterials.

The invention discloses a multistage circulating rubber devolatilization device and method based on microwave-infrared coupling heating, and belongs to the technical field of high polymer material processing. The device comprises a quartz glass tank body, a metal microwave shielding cavity, a microwave generator, an infrared lamp tube, a multi-stage falling strip distributor and a bottom direct connection screw pump. According to the method, the rubber melt is directly heated by microwave volume heating, and surface temperature drop is compensated by infrared radiation, so that rubber thermal crosslinking coking caused by traditional wall surface heating is avoided. According to the device, an intermittent circulation process is adopted, and a rubber solution forms falling strips matched with rheological properties of the rubber solution in different devolatilization stages through on-line switching of thick-hole, middle-hole and micro-hole distributors and matching of gradient regulation and control of vacuum degree and temperature. And the wide-mouth screw pump at the bottom realizes zero liquid holding direct discharge and eliminates flowing dead angles. According to the method, efficient and mild devolatilization of the high-viscosity heat-sensitive synthetic rubber is effectively achieved, the final volatile component content can be stably controlled to be 500 ppm or below, and obvious thermal crosslinking does not occur to the product.

The invention discloses a device and a method for explosive synthesis of a nano positive electrode material. The device comprises an explosion tank, a first operation room and a second operation room, emulsion explosives are stored in the first operation room, and the first operation room is provided with a first operation door communicated with the interior of the explosion tank; a slide way is arranged at the bottom of the explosion tank and is used for transferring the emulsion explosive in the first operation room into the explosion tank; a lifting rope is arranged on the inner top wall of the explosion tank and is used for suspending the emulsion explosive on the slide way at a detonating position in the center of the explosion tank; two sides of the explosion tank are respectively communicated with the first operating room and the second operating room through a first emptying valve and a second emptying valve; the explosion tank is provided with a first vacuumizing valve used for vacuumizing the interior of the explosion tank. The second operation room is provided with a material collecting bin, and a second vacuumizing valve is arranged at the outer side end of the material collecting bin and used for vacuumizing the interior of the second operation room. The second operation room is provided with a third operation door communicated with the interior of the explosion tank.

The present disclosure provides a pressure control valve (1), in particular for use in a urea-producing plant. The present disclosure also provides a urea-producing plant comprising one or more pressure control valves (1), and the use of a pressure control valve (1) in a urea-producing plant. The pressure control valve (1) comprises a first body part (2) and a second body part (3) fluidically connected to each other through a valve seat (8), wherein the first body part (2) comprises an inlet (4) and a flow-regulating component, the movement of which regulates the volume flow rate of fluid flowing from the first body part (2) to the second body part (3); the second body part (3) comprises an outlet (5); the first body part (2) and the second body part (3) are made from the same first material; wherein the valve seat (8) has a cylindrical shape and circular walls and comprises an inner region (10) and an outer region (9), and wherein the outer region (9) is made from a second material, the inner region (10) is made from a third material, and the second material has a lower hardness than the third material.

A decomposition method and a decomposition apparatus for resin capable of safely and efficiently decomposing a resin are provided. A decomposition apparatus for resin 10 includes: a cylinder 12; a resin supplier 11 supplying a thermoplastic resin to the cylinder 12; a screw 12a transporting the supplied thermoplastic resin and a melt-plasticized thermoplastic resin; a fluid supplier 13 supplying a heated and pressurized fluid into the cylinder in order to decompose the melt-plasticized thermoplastic resin in a subcritical state or a supercritical state; an extruder 14 provided at a tip of the cylinder 12 and discharging a decomposed product of the thermoplastic resin to outside of the cylinder; a rotary drive mechanism 15 rotationally driving the screw 12a; and a backflow suppression mechanism 16 suppressing backflow of the melt-plasticized thermoplastic resin in the cylinder 12.

The invention relates to a novel high-temperature and high-pressure reaction kettle which comprises a kettle body, a flange, a heating furnace and a pressure control system, the heating furnace is located below the kettle body, the kettle body is divided into an upper part and a lower part, a sealing gasket is arranged between the upper part and the lower part, the flange is arranged on the kettle body, an inner heating rod is arranged in the kettle body, and the pressure control system is arranged in the inner heating rod. A temperature sensor is further arranged on one side of the inner heating rod in the kettle body, the pressure control system is respectively connected with the inner heating rod and the temperature sensor, the pressure control system comprises a pressure sensor, an inlet regulating valve and an outlet regulating valve, and the pressure sensor is positioned between the inlet regulating valve and the inner heating rod. The high-temperature and high-pressure reaction kettle disclosed by the invention has excellent sealing performance, stable temperature control and accurate pressure control, so that a chemical reaction is smoothly carried out under a preset condition, and the high-temperature and high-pressure reaction kettle has important practical value.