阅读说明：本技术 一种新型管壁式碳化硅反应器及其制造方法 (Novel pipe wall type silicon carbide reactor and manufacturing method thereof ) 是由 闫永杰 于 2020-12-10 设计创作，主要内容包括：本发明公开了一种新型管壁式碳化硅反应器及其制造方法,包括反应管,反应管是由碳化硅内管和碳化硅外管经一体化制成的管壁式通道管,碳化硅内管和碳化硅外管之间形成有反应槽流道,反应槽流道在反应管两端的端口处通过封头密封,封头均设有与反应槽流道相连通的通道。制造方法为：内、外素胚管成型；内素胚管加工；内素胚管烧结和精加工；外素胚管加工；内素胚管和外素胚管一体化烧结。本产品采用碳化硅材质高温一体化焊接,提高了反应槽的抗压能力；碳化硅内管的尺寸增大,提高了反应器的通量；该反应器能够很好的应用在苛刻工况如高温,温度最高可达250℃,同时该反应器适应强腐蚀条件,通量大,成本低,能够很好的应用在工业化微通道系统。(The invention discloses a novel pipe wall type silicon carbide reactor and a manufacturing method thereof, and the novel pipe wall type silicon carbide reactor comprises a reaction pipe, wherein the reaction pipe is a pipe wall type channel pipe which is integrally manufactured by a silicon carbide inner pipe and a silicon carbide outer pipe, a reaction tank flow passage is formed between the silicon carbide inner pipe and the silicon carbide outer pipe, the reaction tank flow passage is sealed by end sockets at the end openings of two ends of the reaction pipe, and the end sockets are provided with passages communicated with the reaction tank flow passage. The manufacturing method comprises the following steps: forming an inner and outer blank embryonic tubes; processing a biotin embryonic tube; sintering and fine machining the biotin embryonic tube; processing an exohormone embryonic tube; and integrally sintering the endostatin embryo tube and the exo-biotin embryo tube. The product adopts silicon carbide material high-temperature integrated welding, so that the pressure resistance of the reaction tank is improved; the size of the silicon carbide inner tube is increased, and the flux of the reactor is improved; the reactor can be well applied to harsh working conditions such as high temperature, the temperature can reach 250 ℃ at most, and meanwhile, the reactor is suitable for strong corrosion conditions, has large flux and low cost, and can be well applied to an industrialized microchannel system.)

1. A novel pipe wall type silicon carbide reactor is characterized in that: including reaction tube (1), reaction tube (1) is the pipe wall formula passageway pipe of making through the integration by carborundum inner tube (2) and carborundum outer tube (3), is formed with reaction tank runner (4) between carborundum inner tube (2) and carborundum outer tube (3), and reaction tank runner (4) are sealed through head (5) in the port department at reaction tube (1) both ends, and head (5) all are equipped with the passageway that is linked together with reaction tank runner (4).

2. The novel tubular-walled silicon carbide reactor of claim 1, wherein: reaction tank runner (4) are that processing forms and reaction tank runner (4) type is spiral groove runner through high temperature welding technology between carborundum inner tube (2) and carborundum outer tube (3), reaction tank runner (4) are formed with at least one feed inlet in the port department of the one end of reaction tube (1), reaction tank runner (4) are formed with at least one discharge gate in the port department of the other end of reaction tube (1), the both ends port of reaction tube (1) is all sealed through head (5), be equipped with on the head of one side and advance material pipe (6), it is linked together through feed inlet and reaction tank runner (4) to advance material pipe (6), be equipped with out material pipe (7) on the head of opposite side, it is linked together through discharge gate and reaction tank runner (4) to go out material pipe (7).

3. The novel tube-walled silicon carbide reactor of claim 2, wherein: the utility model discloses a reaction tube, including reaction tube (1), outer tube (8), gasket (9) and sealing washer (10), gasket (9) set up between reaction tube (1) and head (5), sealing washer (10) set up between outer tube (8) have at least two and all with reaction tube (1) parallel arrangement between the head at the both ends of reaction tube (1), the both ends port of reaction tube (1) all matches between the contact surface of head (5) and is provided with gasket (9) and sealing washer (10), gasket (9) set up between reaction tube (1) and head (5), sealing washer (10) set up between outer tube (8) and head (5), the one end of keeping away from gasket (9) on head (5) is equipped with fastening support piece (11) that are used for promoting sealing.

4. The novel tube-walled silicon carbide reactor of claim 3, wherein: a first medium inlet (12) and a first medium outlet (13) are arranged on the silicon carbide inner tube (2) of the reaction tube (1), and a second medium inlet (14) and a second medium outlet (15) are arranged on the silicon carbide outer tube (3).

5. The novel tube-walled silicon carbide reactor of claim 4, wherein: the diameter of the reaction tube (1) is not less than 100mm, the length of the reaction tube (1) is 100mm-3000mm, the sealing pressure in the reaction tube (1) is not more than 20BAR, and the temperature in the reaction tube (1) is not more than 250 ℃.

6. The novel tube-walled silicon carbide reactor of claim 5, wherein: the outer pipe (8) is made of carbon steel or stainless steel, the reaction pipe (1) is made of silicon carbide, and the seal head (5) is made of polytetrafluoroethylene.

7. A manufacturing method of a novel tube wall type silicon carbide reactor is characterized by comprising the following steps: the manufacturing method comprises the following steps:

a. forming an inner plain tube and an outer plain tube: adopting a direct isostatic pressing or extrusion molding silicon carbide ceramic blank pipe as an inner blank pipe of a silicon carbide inner pipe and an outer blank pipe of a silicon carbide outer pipe;

b. processing of an endostatin embryonic tube: processing a reaction tank flow channel with a required structure and a material inlet and a material outlet on the surface of the hypocotyl blank tube by adopting a processing method of a four-axis processing center, wherein the material inlet and the material outlet are set to be single-inlet single-outlet or multi-inlet single-outlet according to the reaction type, and the type of the reaction tank flow channel is processed;

c. sintering and fine processing of the biotin embryo tube: sintering the tube wall of the plain blank tube after being processed at high temperature to densify, and then processing the sintered outer circle through centerless grinding to obtain a silicon carbide inner tube with the same outer diameter;

d. processing of an exohormone embryonic tube: finely processing the inner diameter of the outer tube blank to form a silicon carbide outer tube, wherein the inner diameter of the silicon carbide outer tube is 3-10% larger than that of the sintered silicon carbide inner tube;

e. and (3) integrally sintering the endostatin embryo tube and the exo-biotin embryo tube: and matching the sintered silicon carbide inner tube with the silicon carbide outer tube processed by the outer element blank tube, and sintering in a high-temperature sintering furnace, wherein the sintering temperature is the same as the sintering system of the inner tube, so as to obtain the reaction tube with the tube wall type reaction groove flow passage structure.

Technical Field

The invention relates to the field of chemical equipment, in particular to a novel pipe wall type silicon carbide reactor and a manufacturing method thereof.

Background

In the field of fine chemical engineering, the temperature requirement of many reactions is very strict, the medium of the reactions often has strong acid or strong alkali characteristics, and higher pressure is generated in the reaction process, so that very high requirements are imposed on the core material of the reactor.

The silicon carbide ceramic has the characteristics of high heat conductivity and comprehensive acid and alkali corrosion resistance, and is particularly suitable for severe working conditions such as strong acid, strong alkali, strong corrosion, high-speed gas scouring, particle abrasion and the like. Can treat strong corrosive substances such as hydrofluoric acid, KOH and the like, and therefore, is the first choice for the microchannel reactor.

At present, silicon carbide reactors almost adopt a plate type structure, and the sealing mode adopts an O-shaped ring or mirror surface sealing under the condition of low pressure, but the pressure does not exceed 15BAR generally; under the condition of higher pressure, a high-temperature hot-press welding mode is adopted, and 40BAR can be used. However, the structure is difficult to achieve high flux, the reaction plate is large in size, the manufacturing cost is high, the welding cost is high, large welding stress exists, and large industrialization is difficult to achieve. The development of silicon carbide reactors is restricted by high-throughput microchannel reactors which are resistant to high pressures.

Therefore, a new reactor structure is urgently needed to be found, so as to fully exert the advantages of the silicon carbide material, improve the pressure resistance and the flux, reduce the cost and promote the large-scale popularization of the silicon carbide reactor in the industrial microchannel.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides a novel pipe wall type silicon carbide reactor.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a novel pipe wall formula carborundum reactor, includes the reaction tube, and the reaction tube is the pipe wall formula passageway pipe of being made through the integration by carborundum inner tube and carborundum outer tube, is formed with the reaction tank runner between carborundum inner tube and the carborundum outer tube, and the reaction tank runner is sealed through the head at the port department at reaction tube both ends, and the head all is equipped with the passageway that is linked together with the reaction tank runner.

Furthermore, the reaction tank flow channel is formed by processing a silicon carbide inner tube and a silicon carbide outer tube through a high-temperature welding process, the reaction tank flow channel is spiral, at least one feeding hole is formed in the port of one end of the reaction tube, at least one discharging hole is formed in the port of the other end of the reaction tube, the ports of the two ends of the reaction tube are sealed through end sockets, a material feeding tube is arranged on the end socket on one side and communicated with the reaction tank flow channel through the feeding hole, a material discharging tube is arranged on the end socket on the other side and communicated with the reaction tank flow channel through the discharging hole.

Further, through outer union coupling between the head at the both ends of reaction tube, the outer tube setting is in the periphery of reaction tube, and the outer tube has at least two and all with reaction tube parallel arrangement, all matches between the contact surface of the both ends port of reaction tube and head and is provided with gasket and sealing washer, and the gasket setting is between reaction tube and head, and the sealing washer setting is between outer tube and head, and the one end of keeping away from the gasket on the head is equipped with the fastening support piece that is used for promoting sealing pressure.

Furthermore, a silicon carbide inner tube of the reaction tube is provided with a first medium inlet and a first medium outlet, and a silicon carbide outer tube is provided with a second medium inlet and a second medium outlet.

Further, the diameter of the reaction tube is not less than 100mm, the length of the reaction tube is 100mm-3000mm, the sealing pressure in the reaction tube 1 is not more than 20BAR, and the temperature in the reaction tube is not more than 250 ℃.

Furthermore, the outer pipe is made of carbon steel or stainless steel, the reaction pipe is made of silicon carbide, and the end enclosure is made of polytetrafluoroethylene.

A manufacturing method of a novel tube wall type silicon carbide reactor comprises the following steps:

a. forming an inner plain tube and an outer plain tube: adopting a direct isostatic pressing or extrusion molding silicon carbide ceramic blank pipe as an inner blank pipe of a silicon carbide inner pipe and an outer blank pipe of a silicon carbide outer pipe;

b. processing of an endostatin embryonic tube: processing a reaction tank flow channel with a required structure and a material inlet and a material outlet on the surface of the hypocotyl blank tube by adopting a processing method of a four-axis processing center, wherein the material inlet and the material outlet are set to be single-inlet single-outlet or multi-inlet single-outlet according to the reaction type, and the type of the reaction tank flow channel is processed;

c. sintering and fine processing of the biotin embryo tube: sintering the tube wall of the plain blank tube after being processed at high temperature to densify, and then processing the sintered outer circle through centerless grinding to obtain a silicon carbide inner tube with the same outer diameter;

d. processing of an exohormone embryonic tube: finely processing the inner diameter of the outer tube blank to form a silicon carbide outer tube, wherein the inner diameter of the silicon carbide outer tube is 3-10% larger than that of the sintered silicon carbide inner tube;

e. and (3) integrally sintering the endostatin embryo tube and the exo-biotin embryo tube: and matching the sintered silicon carbide inner tube with the silicon carbide outer tube processed by the outer element blank tube, and sintering in a high-temperature sintering furnace, wherein the sintering temperature is the same as the sintering system of the inner tube, so as to obtain the reaction tube with the tube wall type reaction groove flow passage structure.

The invention discloses a novel pipe wall type silicon carbide reactor and a manufacturing method thereof.A silicon carbide material high-temperature integrated welding is adopted for an inner pipe of the reactor, so that the pressure resistance of a reaction tank is improved, and the pressure can reach 20BAR at most; the size of the silicon carbide inner tube is increased, and the flux of the reactor is improved; the reactor can be well applied to harsh working conditions such as high temperature, the temperature can reach 250 ℃ at most, and meanwhile, the reactor is suitable for strong corrosion conditions, has large flux and low cost, and can be well applied to an industrialized microchannel system.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a perspective view of the present invention.

FIG. 3 is a front view of a silicon carbide inner tube.

FIG. 4 is a perspective view of a flow channel of a reaction tank in which a silicon carbide inner tube is arranged in a single inlet and a single outlet.

FIG. 5 is a perspective view of a flow channel of a reaction tank with a silicon carbide inner tube having double inlets and single outlets.

In the figure: 1. a reaction tube; 2. a silicon carbide inner tube; 3. a silicon carbide outer tube; 4. a flow channel of the reaction tank; 5. sealing the end; 6. a material inlet pipe; 7. a discharge pipe; 8. an outer tube; 9. a gasket; 10. a seal ring; 11. fastening a support; 12. a first media inlet; 13. a first media outlet; 14. a second medium inlet; 15. and a second medium outlet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the first embodiment, the novel tube-wall silicon carbide reactor shown in fig. 1-3 includes a reaction tube 1, where the reaction tube 1 is a tube-wall channel tube integrally formed by a silicon carbide inner tube 2 and a silicon carbide outer tube 3, where the reaction tube 1 is composed of a silicon carbide tube with a reaction channel flow channel 4 on a tube wall of the silicon carbide inner tube 2 and a silicon carbide outer tube 3 matched with the silicon carbide tube, and thus a reaction channel flow channel 4 is formed between the silicon carbide inner tube 2 and the silicon carbide outer tube 3, the reaction channel flow channel 4 is formed by processing the silicon carbide inner tube 2 and the silicon carbide outer tube 3 through a high-temperature welding process, and the type of the reaction channel flow channel 4 is a spiral channel flow channel;

the reaction tank flow channel 4 is sealed by end sockets 5 at the end openings of two ends of the reaction tube 1, and the end sockets 5 are provided with channels communicated with the reaction tank flow channel 4; a feed inlet is formed at the port of one end of the reaction tube 1 of the reaction channel 4, as shown in fig. 4, a discharge outlet is formed at the port of the other end of the reaction tube 1 of the reaction channel 4 to form a single-inlet single-outlet reaction channel 4, the ports of the two ends of the reaction tube 1 are sealed by end sockets 5, a material inlet tube 6 is arranged on the end socket on one side, the material inlet tube 6 is communicated with the reaction channel 4 through the feed inlet, a material outlet tube 7 is arranged on the end socket on the other side, and the material outlet tube 7 is communicated with the reaction channel 4 through the discharge outlet.

Preferably, connect through outer tube 8 between the head at the both ends of reaction tube 1, outer tube 8 sets up the periphery at reaction tube 1, outer tube 8 has at least two and all with reaction tube 1 parallel arrangement, all match between the contact surface of the both ends port of reaction tube 1 and head 5 and be provided with gasket 9 and sealing washer 10, gasket 9 sets up between reaction tube 1 and head 5, sealing washer 10 sets up between outer tube 8 and head 5, the one end of keeping away from gasket 9 on head 5 is equipped with fastening support piece 11 that is used for promoting sealing pressure.

The reaction tube 1 and the outer tube 8 are connected together by a gasket 9 made of polytetrafluoroethylene material through a fastening support piece 11 and a seal head 5, and a material inlet and a material outlet of the seal head are connected with a material inlet of the inner tube. The silicon carbide reactor takes a groove flow channel on the wall of an inner pipe as a reaction channel of materials, and the channels of a silicon carbide inner pipe 2 and a silicon carbide outer pipe 3 as heating or cooling medium channels, so that the aim of material reaction is fulfilled.

Preferably, the silicon carbide inner tube 2 of the reaction tube 1 is provided with a first medium inlet 12 and a first medium outlet 13, and the silicon carbide outer tube 3 is provided with a second medium inlet 14 and a second medium outlet 15.

The diameter of the reaction tube 1 of this example was 100mm, the length of the reaction tube 1 was 2000mm, the sealing pressure in the reaction tube 1 was 18BAR, and the temperature in the reaction tube 1 was 200 ℃.

The outer tube 8 of this embodiment adopts stainless steel material, and reaction tube 1 adopts the carborundum material, and head 5 adopts the polytetrafluoroethylene material.

In the second embodiment, the novel tube-wall silicon carbide reactor shown in fig. 1-3 includes a reaction tube 1, where the reaction tube 1 is a tube-wall channel tube integrally formed by a silicon carbide inner tube 2 and a silicon carbide outer tube 3, where the reaction tube 1 is composed of a silicon carbide tube with a reaction channel flow channel 4 on the tube wall of the silicon carbide inner tube 2 and a silicon carbide outer tube 3, and thus a reaction channel flow channel 4 is formed between the silicon carbide inner tube 2 and the silicon carbide outer tube 3, the reaction channel flow channel 4 is formed by processing the silicon carbide inner tube 2 and the silicon carbide outer tube 3 through a high-temperature welding process, and the type of the reaction channel flow channel 4 is a spiral channel flow channel;

the reaction tank flow channel 4 is sealed by end sockets 5 at the end openings of two ends of the reaction tube 1, and the end sockets 5 are provided with channels communicated with the reaction tank flow channel 4; as shown in fig. 5, two feed inlets are formed at the port of one end of the reaction tube 1 in the reaction channel 4, a discharge outlet is formed at the port of the other end of the reaction tube 1 in the reaction channel 4 to form a double-inlet single-outlet reaction channel 4, the ports of both ends of the reaction tube 1 are sealed by end sockets 5, a material inlet tube 6 is arranged on the end socket on one side, the material inlet tube 6 is communicated with the reaction channel 4 through the feed inlet, a material outlet tube 7 is arranged on the end socket on the other side, and the material outlet tube 7 is communicated with the reaction channel 4 through the discharge outlet.

Preferably, connect through outer tube 8 between the head at the both ends of reaction tube 1, outer tube 8 sets up the periphery at reaction tube 1, outer tube 8 has at least two and all with reaction tube 1 parallel arrangement, all match between the contact surface of the both ends port of reaction tube 1 and head 5 and be provided with gasket 9 and sealing washer 10, gasket 9 sets up between reaction tube 1 and head 5, sealing washer 10 sets up between outer tube 8 and head 5, the one end of keeping away from gasket 9 on head 5 is equipped with fastening support piece 11 that is used for promoting sealing pressure.

The reaction tube 1 and the outer tube 8 are connected together by a gasket 9 made of polytetrafluoroethylene material through a fastening support piece 11 and a seal head 5, and a material inlet and a material outlet of the seal head are connected with a material inlet of the inner tube. The silicon carbide reactor takes a groove flow channel on the wall of an inner pipe as a reaction channel of materials, and the channels of a silicon carbide inner pipe 2 and a silicon carbide outer pipe 3 as heating or cooling medium channels, so that the aim of material reaction is fulfilled.

Preferably, the silicon carbide inner tube 2 of the reaction tube 1 is provided with a first medium inlet 12 and a first medium outlet 13, and the silicon carbide outer tube 3 is provided with a second medium inlet 14 and a second medium outlet 15.

The diameter of the reaction tube 1 of this example was 200mm, the length of the reaction tube 1 was 3000mm, the sealing pressure in the reaction tube 1 was 20BAR, and the temperature in the reaction tube 1 was 250 ℃.

The outer tube 8 of this embodiment adopts the carbon steel material, and the reactor tube 1 adopts the carborundum material, and head 5 adopts the polytetrafluoroethylene material.

The manufacturing method of the novel pipe-wall type silicon carbide reactor comprises the following steps:

a. forming an inner plain tube and an outer plain tube: adopting a direct isostatic pressing or extrusion molding silicon carbide ceramic blank pipe as an inner blank pipe of a silicon carbide inner pipe and an outer blank pipe of a silicon carbide outer pipe;

b. processing of an endostatin embryonic tube: processing a reaction tank flow channel with a required structure and a material inlet and a material outlet on the surface of the hypocotyl blank tube by adopting a processing method of a four-axis processing center, wherein the material inlet and the material outlet are set to be single-inlet single-outlet or multi-inlet single-outlet according to the reaction type, and the type of the reaction tank flow channel is processed;

c. sintering and fine processing of the biotin embryo tube: sintering the tube wall of the plain blank tube after being processed at high temperature to densify, and then processing the sintered outer circle through centerless grinding to obtain a silicon carbide inner tube with the same outer diameter;

d. processing of an exohormone embryonic tube: finely processing the inner diameter of the outer tube blank to form a silicon carbide outer tube, wherein the inner diameter of the silicon carbide outer tube is 3-10% larger than that of the sintered silicon carbide inner tube;

e. and (3) integrally sintering the endostatin embryo tube and the exo-biotin embryo tube: and matching the sintered silicon carbide inner tube with the silicon carbide outer tube processed by the outer element blank tube, and sintering in a high-temperature sintering furnace, wherein the sintering temperature is the same as the sintering system of the inner tube, so as to obtain the reaction tube with the tube wall type reaction groove flow passage structure.

The invention discloses a novel pipe wall type silicon carbide reactor and a manufacturing method thereof, compared with a traditional micro-channel reactor with a plate structure, the novel pipe wall type silicon carbide reactor has the effects of high flux, high sealing pressure and high heat transfer, and particularly, a reaction groove flow channel, namely a reaction channel of materials, is designed on the wall of a silicon carbide pipe, so that the flux can be easily increased; the traditional micro-channel reactor with a plate structure is very difficult to weld when the size reaches 300mm, and the cost is high; the structural parameter data of the product can reach the same flux of the traditional microchannel reactor with a plate structure under the conditions of 100mm of outer diameter and 300mm of length; for the pipe wall type structure, the reaction pipe is formed by sintering two silicon carbide pipes at high temperature, and the sealing channel forms high pressure; the reaction tube and the outer tube are pressed tightly through the gasket, the sealing ring and the fastening support piece, the sealing performance is strong, the inner surface and the outer surface of the reaction tube are provided with the medium inlet and the medium outlet, the reaction tube can be heated or cooled, and the heat transfer efficiency is higher than that of the traditional micro-channel reactor with a plate structure.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.