CN211070031U - Novel gas-solid photocatalytic reactor - Google Patents
Novel gas-solid photocatalytic reactor Download PDFInfo
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- CN211070031U CN211070031U CN201920970907.9U CN201920970907U CN211070031U CN 211070031 U CN211070031 U CN 211070031U CN 201920970907 U CN201920970907 U CN 201920970907U CN 211070031 U CN211070031 U CN 211070031U
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Abstract
The utility model relates to a novel gas-solid photocatalytic reactor, its characterized in that: the device comprises a reactor (7), wherein a flat reaction zone (8) is arranged in the middle of the reactor (7), and a quartz sand plate (9) is arranged at the lower part of the flat reaction zone (8); the upper end of the reactor (7) is connected with the upper tee joint (3) in a socket-and-spigot sealing way; the lower end of the reactor (7) is connected with the lower tee joint (3-1) in a socket-and-spigot sealing way. The utility model provides a novel gas-solid photocatalytic reactor, which is provided with a quartz sand plate, and has convenient catalyst filling and simple operation; the reaction zone is of a flat structure, so that the catalyst can be thinned, the using amount of the catalyst is reduced, the illumination is uniform, and the illumination area is greatly increased; the gas-solid photocatalytic reaction is realized, the aim of effectively combining a gas path and a light path is fulfilled, and the complete contact reaction of reaction gas and a solid catalyst is realized.
Description
Technical Field
The utility model relates to a chemical reaction device field, especially one kind relate to and are used for photocatalysis, gas-solid phase catalysis, carbon dioxide reduction, light and heat catalysis, light catalytic synthesis, the novel gas-solid photocatalytic reactor in fields such as photocatalysis degradation organic matter, catalytic degradation harmful gas (VOCs, NOx, Sox, acetaldehyde, formaldehyde etc.), heat catalysis, photochemistry.
Background
Photochemical and photocatalytic oxidation methods are currently a more studied advanced oxidation technology. The photocatalytic reaction is a chemical reaction that proceeds by the action of light. Photochemical reactions require molecules to absorb electromagnetic radiation of a particular wavelength, be excited to produce a molecular excited state, and then undergo a chemical reaction to produce a new species, or become an intermediate chemical product that initiates a thermal reaction. The activation energy of photochemical reaction is derived from the energy of photons, and photoelectric conversion and photochemical conversion are always active research fields in the utilization of solar energy.
Photocatalytic oxidation technology utilizes photo-excitation oxidation to oxidize O2、H2O2The oxidizing agent is combined with the light radiation. Photodegradation generally refers to the gradual oxidation of organic substances into low-molecular intermediate products under the action of light to finally generate CO2、 H2O and other ions, e.g. NO3 -、PO4 3-、Cl-And the like. The photodegradation of organic substances can be divided into direct photodegradation and indirect photodegradation. The former is a chemical reaction that occurs further after the organic molecules absorb light energy. The latter is a reaction in which some substances existing in the surrounding environment absorb light energy to form an excited state and then induce a series of organic pollution. Indirect photodegradation is more important for organic pollutants that are difficult to biodegrade in the environment. The way of degrading pollutants by photochemical reaction includes photochemical oxidation process without catalyst and with catalyst. The former mainly adopts oxygen and hydrogen peroxide as oxidants, and pollutants are oxidized and decomposed under the irradiation of ultraviolet light; the latter is also known as photocatalytic oxidation and can be generally classified into two types, homogeneous and heterogeneous catalysis. The common method in homogeneous photocatalytic degradation is Fe2+Or Fe3+And H2O2As a medium, OH is generated through a photo-Fenton reaction to degrade pollutants, in heterogeneous photocatalytic degradation, a certain amount of photosensitive semiconductor material is added into a pollution system, a certain amount of light radiation is combined, the photosensitive semiconductor is excited under the irradiation of light to generate electron-hole pairs, dissolved oxygen, water molecules and the like adsorbed on the semiconductor react with the electron-hole pairs to generate free radicals with strong oxidizability such as OH, and the pollutants are completely or nearly completely mineralized through the addition, substitution and electron transfer equation between the free radicals and the pollutants.
The photochemical tubular reactors commonly used in laboratories at present are all reactors made of high borosilicate glass or quartz glass to realize experiments, and are mainly used for facilitating light transmission and preventing pollution in the reaction process. The reactors are mostly a quartz straight tube, and the two ends of the reactor are sealed by rubber plugs. Firstly, inserting a temperature measuring thermocouple into a rubber plug at the bottom of the reactor, and adjusting the length of the thermocouple to enable the top end of the thermocouple to be positioned in a reaction zone of the reactor; filling inert substances such as quartz sand and the like at the lower part of the reaction area for supporting; then filling a catalyst, and covering a top rubber plug; finally, all pipelines are externally connected. The reactor has the advantages of simple structure and low cost. The disadvantages that the filling of the catalyst is very troublesome; the inert material powder at the bottom is easy to block a subsequent pipeline; the inert material powder is easy to cause catalyst pollution and is not easy to recycle; the temperature measuring thermocouple can not be fixed, and the temperature measuring contact is fixed at the center of the reactor; the catalyst is too thick, light cannot irradiate a radial central area, and the illumination is not uniform; the experimental amount of the catalyst is large, the utilization rate of the catalyst is low, and the new catalyst is difficult to manufacture or expensive in scientific research field; the externally connected pipelines of the rubber plugs are inconvenient and irregular; the rubber plug cannot bear pressure, and particularly, the rubber plug at the bottom bears the weight of the filler and is easy to loosen and leak; the sealed rubber plug is very thick, and the top of the reactor is difficult to prick and inject liquid.
In view of the above-mentioned drawbacks of the prior art, the present inventors have made active research and innovation to create a photochemical quartz reactor with a novel structure, which is more practical.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel gas-solid photocatalytic reactor, the technical problem that solve as follows: (1) the problem of sealing the existing quartz reactor and a metal pipeline is solved, and the reactor is enabled to bear certain pressure; (2) the problems that an external connecting pipeline of the existing reactor is inconvenient and disorderly are solved; (3) the problems that the existing sealed rubber plug is very thick and the top of the reactor is difficult to prick and inject liquid are solved; (4) the problems that the existing temperature measurement thermocouple cannot be fixed and the temperature measurement contact cannot be fixed in the center of the reactor are solved; (5) the problems that the catalyst is easy to pollute and difficult to recover are solved; (6) the problems that the catalyst of the existing reactor is troublesome to fill, and the inert material powder at the bottom is easy to block a subsequent pipeline are solved; (7) the problems of large experimental consumption of the catalyst and low utilization rate of the catalyst are solved; (8) the problems that the catalyst is too thick, light cannot irradiate the catalyst inside, and the illumination is not uniform are solved; (9) the problems that the illumination area of the existing reactor is too small and the experimental effect is poor are solved.
In order to solve the technical problem, the utility model discloses a following technical scheme:
(1) a novel gas-solid photocatalytic reactor comprises a reactor, wherein a flat reaction zone is arranged in the middle of the reactor, and a quartz sand plate is arranged at the lower part of the flat reaction zone; the upper end of the reactor is connected with the upper tee joint in a socket-and-spigot sealing way; the lower end of the reactor is connected with the lower tee joint in a socket-and-spigot sealing way.
(2) The novel gas-solid photocatalytic reactor according to the (1), wherein the upper three-way joint is provided with a liquid injection port, an air inlet, an O-shaped sealing ring, a tetrafluoro pressing ring and an outer nut.
(3) The novel gas-solid photocatalytic reactor according to the (1) or (2), wherein a tightening inclined structure is arranged at the position where the upper three-way joint is connected with the O-shaped sealing ring, the outer nut is in threaded connection with the upper three-way joint, and the outer nut is screwed to push the tetrafluoro pressing ring to extrude the O-shaped sealing ring, so that the O-shaped sealing ring tightly clamps the reactor.
(4) The novel gas-solid photocatalytic reactor according to any one of (1) to (3), wherein the lower three-way joint is provided with an O-shaped sealing ring, a tetrafluoro pressing ring, an outer nut, an exhaust port, a temperature control port and a thermocouple sleeve, and a temperature measurement thermocouple is inserted into the thermocouple sleeve.
(5) The novel gas-solid photocatalytic reactor according to any one of (1) to (4), wherein a tightening inclined structure is arranged at the position where the lower three-way joint is connected with the O-shaped sealing ring, the outer nut is in threaded connection with the lower three-way joint, and the outer nut is screwed to push the tetrafluoro pressing ring to extrude the O-shaped sealing ring, so that the O-shaped sealing ring tightly clamps the reactor.
(6) A novel gas-solid photocatalytic reactor as described in any one of (1) to (5), wherein the top end of said thermocouple sleeve is in contact with the bottom of the quartz sand plate.
(7) According to any one of (1) to (6), a heating furnace is arranged outside the reactor, a quartz rod is arranged in the middle of the heating furnace, and the quartz rod is a light source light-transmitting window.
(8) The novel gas-solid photocatalytic reactor according to any one of (1) to (7), wherein the heating furnace comprises a thermal inertia body and heating furnace tiles, the thermal inertia body is wrapped on the reactor, and the heating furnace tiles are wrapped on the thermal inertia body.
(9) The novel gas-solid photocatalytic reactor according to any one of (1) to (3), wherein the external connectors of the temperature control port, the air inlet, the air outlet and the liquid injection port are all standard connectors. The liquid injection port is used for injecting liquid or sampling in a needle inserting mode.
The utility model provides a pair of novel gas-solid photocatalytic reactor has following beneficial technological effect:
1. the reactor is respectively connected with the upper tee joint and the lower tee joint in a socket and spigot type sealing way. The quartz reactor is hermetically connected with a metal pipeline, the spigot-and-socket structure comprises four parts, namely a tee joint, an O-shaped sealing ring, a polytetrafluoroethylene pressing ring and an outer nut, and the locking strength can be realized by tightening or loosening the outer nut. Solves the safety problems that the original rubber plug seal can not bear pressure and is easy to leak gas.
2. The temperature control port, the air inlet, the air outlet and the liquid injection port are all standard connectors, so that the connection is convenient and the replacement is easy. The problem of current reactor external pipeline extremely inconvenient, and indiscriminate is solved.
3. Because the liquid injection port is designed, the screw cap tightly presses the small rubber pad to seal, the thickness of the rubber pad is easy to penetrate through by the needle head, and the injection or sampling in a needle inserting mode is very convenient. Solves the problems that the existing sealed rubber plug is very thick and the top of the reactor is difficult to be pricked and injected with liquid.
4. The temperature control port adopts a clamping sleeve mode to lock and fix the thermocouple sleeve, and the temperature measuring thermocouple is placed in the thermocouple sleeve and can directly extend to the bottom of the quartz sand plate. The problem of current temperature measurement thermocouple can't be fixed, temperature measurement contact can't be fixed at the reactor center is solved. Because the temperature measuring thermocouple is arranged at the bottom of the quartz sand plate, the temperature measuring thermocouple cannot shield light and does not occupy the catalyst filling space.
5. The carrier of the catalyst is a quartz sand plate, so that the catalyst particles are filtered, and the problems that the catalyst of the existing reactor is troublesome to fill and the subsequent pipeline is easily blocked by inert material powder at the bottom are solved.
6. The quartz sand plate is used as a carrier of the catalyst, and an inert material is not used for supporting the catalyst. Solves the problems that the catalyst is easy to pollute and difficult to recycle.
7. The quartz sand plate has uniform gaps and good air permeability. Catalyst particles can fully contact with reaction gas, the utilization rate of the catalyst is improved, and the experimental dosage of the catalyst is reduced.
8. The reaction zone of the reactor is of a flat configuration. The flat structure can make the catalyst thin, and all catalysts can both receive the illumination, and the illumination is even, and the photic area greatly increased. The problems that the catalyst is too thick, light cannot irradiate the internal catalyst, and the illumination area of the existing reactor is too small and the experimental effect is poor are solved.
The utility model provides a pair of novel gas-solid photocatalytic reactor enables gas circuit, light path and detects the part and effectively combines, and mutual noninterference is the ideal reactor of gas-solid photocatalytic reaction.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of a novel gas-solid photocatalytic reactor of the present invention;
reference numbers in the figures: a is a reaction gas flow inlet, B is a quartz sand plate loaded with a catalyst, C is a reaction gas flow outlet, and D is a light source.
FIG. 2 is a schematic structural view of a novel gas-solid photocatalytic reactor of the present invention;
FIG. 3 is a side view of FIG. 2;
reference numbers in fig. 2 and 3: 1. the device comprises a liquid injection port, 2 air inlets, 3 upper tee joints, 3-1 lower tee joints, 4O-shaped sealing rings, 5 tetrafluoro pressing rings, 6 outer nuts, 7 reactors, 8 reaction zones, 9 quartz sand plates, 10 catalysts, 11 exhaust ports, 12 temperature control ports, 13 thermocouple sleeves and 14 temperature measurement thermocouples.
FIG. 4 is a schematic structural diagram of a preferred embodiment of the present invention;
reference numbers in the figures: 1. the device comprises a liquid injection port, 2 air inlets, 3 upper tee joints, 3-1 lower tee joints, 4O-shaped sealing rings, 5 tetrafluoro press rings, 6 outer nuts, 7 reactors, 8 reaction zones, 9 quartz sand plates, 10 catalysts, 11 exhaust ports, 12 temperature control ports, 13 thermocouple sleeves, 14 temperature measurement thermocouples, 15 thermal inertia bodies, 16 heating furnaces, 17 heating furnace tiles and 18 quartz rods.
FIG. 5 is a schematic structural diagram of a novel gas-solid photocatalytic reactor without quartz sand plates;
FIG. 6 is a side view of FIG. 5;
FIG. 7 is a schematic view of another embodiment;
fig. 8 is a side view of fig. 7.
Detailed Description
Example 1:
fig. 1 is a schematic diagram of the novel gas-solid photocatalytic reactor of the present invention, wherein a is a reaction airflow inlet, B is a quartz sand plate loaded with a catalyst, C is a reaction airflow outlet, and D is a light source.
As shown in fig. 2 and 3, a novel gas-solid photocatalytic reactor comprises a reactor 7, wherein a flat reaction zone 8 is arranged in the middle of the reactor 7; a quartz sand plate 9 is arranged at the lower part of the flat reaction zone 8. The flat reaction zone 8 enables the catalyst 10 to be thinned, greatly reducing the experimental catalyst usage.
The upper end of the reactor 7 is connected with the upper three-way joint 3 in a socket-and-spigot sealing way, and the upper three-way joint 3 is provided with a liquid injection port 1, an air inlet 2, an O-shaped sealing ring 4, a tetrafluoro pressing ring 5 and an outer nut 6. The upper three-way joint 3 is connected with the O-shaped sealing ring 4 through a tightened inclined structure, the outer nut 6 is in threaded connection with the upper three-way joint 3, and the outer nut 6 is screwed to push the PTFE pressing ring 5 to extrude the O-shaped sealing ring 4, so that the O-shaped sealing ring 4 clamps the quartz reactor 7. The tightness can be adjusted by the mode, a certain pressure can be borne, and the safety problem of gas leakage can be solved.
The lower end of the reactor 7 is connected with the lower tee joint 3-1 in a socket-and-spigot sealing way. The lower three-way joint 3-1 is provided with an O-shaped sealing ring 4, a tetrafluoro pressing ring 5, an outer nut 6, an exhaust port 11, a temperature control port 12 and a thermocouple sleeve 13, and a temperature measuring thermocouple 14 is inserted into the thermocouple sleeve 13. The lower three-way joint 3-1 is connected with the O-shaped sealing ring 4 through a tightened inclined structure, the outer nut 6 is in threaded connection with the lower three-way joint 3-1, and the outer nut 6 is screwed to push the PTFE pressing ring 5 to extrude the O-shaped sealing ring 4, so that the O-shaped sealing ring 4 clamps the quartz reactor 7. The tightness can be adjusted by the mode, a certain pressure can be borne, and the safety problem of gas leakage can be solved.
The top end of the thermocouple sleeve 13 is contacted with the bottom of the quartz sand plate 9, the contact position is just the central position of the reactor, and the temperature measuring thermocouple 14 can accurately measure the central temperature of the reactor. Because the temperature measuring thermocouple 14 is arranged at the bottom of the quartz sand plate 9, the temperature measuring thermocouple cannot block light and does not occupy the catalyst filling space.
The external connector of the temperature control port 12, the air inlet 2, the exhaust port 11 and the liquid injection port 1 is a standard connector, so that the connection is convenient and the replacement is easy. The injection port 1 is used for injection or sampling in a needle insertion manner.
When the novel gas-solid photocatalytic reactor works, the light source directly irradiates the flat reaction zone 8, and the reaction gas enters from the gas inlet 2 and is discharged from the gas outlet 11; the reaction liquid enters from the liquid injection port 1; the catalyst is arranged on a quartz sand plate 9. The reaction gas entering from the upper part passes through the catalyst, then passes through the quartz sand plate 9 and flows out from the exhaust port 11, and the catalyst can be fully contacted with the reaction gas in the process, so that the utilization rate of the catalyst is improved. The reactor can effectively combine the gas circuit, the light circuit and the detection component without mutual interference, and is an ideal reactor for gas-solid photocatalytic reaction.
Example 2:
this example differs from example 1 in that a heating furnace 16 is additionally provided in the reactor 7. As shown in fig. 4, a novel gas-solid photocatalytic reactor comprises a reactor 7, wherein a flat reaction zone 8 is arranged in the middle of the reactor 7; a quartz sand plate 9 is arranged at the lower part of the flat reaction zone 8. The flat reaction zone 8 enables the catalyst 10 to be thinned, greatly reducing the experimental catalyst usage.
The upper end of the reactor 7 is connected with the upper three-way joint 3 in a socket-and-spigot sealing way, and the upper three-way joint 3 is provided with a liquid injection port 1, an air inlet 2, an O-shaped sealing ring 4, a tetrafluoro pressing ring 5 and an outer nut 6. The upper three-way joint 3 is connected with the O-shaped sealing ring 4 through a tightened inclined structure, the outer nut 6 is in threaded connection with the upper three-way joint 3, and the outer nut 6 is screwed to push the PTFE pressing ring 5 to extrude the O-shaped sealing ring 4, so that the O-shaped sealing ring 4 clamps the quartz reactor 7. The tightness can be adjusted by the mode, a certain pressure can be borne, and the safety problem of gas leakage can be solved.
The lower end of the reactor 7 is connected with the lower tee joint 3-1 in a socket-and-spigot sealing way. The lower three-way joint 3-1 is provided with an O-shaped sealing ring 4, a tetrafluoro pressing ring 5, an outer nut 6, an exhaust port 11, a temperature control port 12 and a thermocouple sleeve 13, and a temperature measuring thermocouple 14 is inserted into the thermocouple sleeve 13. The lower three-way joint 3-1 is connected with the O-shaped sealing ring 4 through a tightened inclined structure, the outer nut 6 is in threaded connection with the lower three-way joint 3-1, and the outer nut 6 is screwed to push the PTFE pressing ring 5 to extrude the O-shaped sealing ring 4, so that the O-shaped sealing ring 4 clamps the quartz reactor 7. The tightness can be adjusted by the mode, a certain pressure can be borne, and the safety problem of gas leakage can be solved.
The top end of the thermocouple sleeve 13 is contacted with the bottom of the quartz sand plate 9, the contact position is just the central position of the reactor, and the temperature measuring thermocouple 14 can accurately measure the central temperature of the reactor. Because the temperature measuring thermocouple 14 is arranged at the bottom of the quartz sand plate 9, the temperature measuring thermocouple cannot block light and does not occupy the catalyst filling space.
The external connector of the temperature control port 12, the air inlet 2, the exhaust port 11 and the liquid injection port 1 is a standard connector, so that the connection is convenient and the replacement is easy. The injection port 1 is used for injection or sampling in a needle insertion manner.
A heating furnace 16 is arranged outside the reactor 7, and the heating furnace 16 provides a source for the heat of the reactor; a quartz rod 18 is arranged in the middle of the heating furnace 16, and the quartz rod 18 is a light transmission window of a light source. The heating furnace 16 comprises a thermal inertia body 15 and heating furnace tiles 17, wherein the thermal inertia body 15 is wrapped on the reactor 7, and the heating furnace tiles 17 are wrapped on the thermal inertia body 15. The left and the right of the heating furnace are provided with 18 windows of the quartz rod, and both sides of the catalyst can receive light, so that the light is uniform. And the light receiving area is greatly increased.
When the novel gas-solid photocatalytic reactor works, a light source irradiates the flat reaction zone 8 through the quartz rod 18, and reaction gas enters from the gas inlet 2 and is discharged from the gas outlet 11; the reaction liquid enters from the liquid injection port 1; the catalyst is arranged on a quartz sand plate 9. The reaction gas entering from the upper part passes through the catalyst, then passes through the quartz sand plate 9 and flows out from the exhaust port 11, and the catalyst can be fully contacted with the reaction gas in the process, so that the utilization rate of the catalyst is improved. The reactor can effectively combine the gas circuit, the light circuit and the detection component without mutual interference, and is an ideal reactor for gas-solid photocatalytic reaction.
Example 3:
as shown in fig. 5 and 6, a novel gas-solid photocatalytic reactor is different from the reactor of example 1 in that a quartz sand plate 9 is not provided in the reactor 7. When in use, the air outlet can be connected with a filter to prevent impurities from blocking subsequent pipelines, and the reactor has the advantage of convenient cleaning.
Example 4:
as shown in fig. 7 and 8, a novel gas-solid photocatalytic reactor is manufactured by flattening the middle of a whole round pipe. The reactor has the advantage that the pressure resistance of the whole reactor is stronger.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.
Claims (8)
1. A novel gas-solid photocatalytic reactor is characterized in that: the device comprises a reactor (7), wherein a flat reaction area (8) is arranged in the middle of the reactor (7), and the upper end of the reactor (7) is in spigot-and-socket sealing connection with an upper tee joint (3); the lower end of the reactor (7) is connected with the lower three-way joint (3-1) in a socket-and-spigot sealing way; the upper three-way joint (3) is provided with a liquid injection port (1), an air inlet (2), an O-shaped sealing ring (4), a tetrafluoro pressing ring (5) and an outer nut (6); the lower three-way joint (3-1) is provided with an O-shaped sealing ring (4), a tetrafluoro pressing ring (5), an outer nut (6), an exhaust port (11), a temperature control port (12) and a thermocouple sleeve (13), and a temperature measurement thermocouple (14) is inserted into the thermocouple sleeve (13).
2. The novel gas-solid photocatalytic reactor according to claim 1, characterized in that: a quartz sand plate (9) is arranged at the lower part of the flat reaction zone (8).
3. The novel gas-solid photocatalytic reactor according to claim 1, characterized in that: a tightening inclined structure is arranged at the position where the upper three-way joint (3) is connected with the O-shaped sealing ring (4), the outer nut (6) is in threaded connection with the upper three-way joint (3), and the polytetrafluoroethylene pressing ring (5) is pushed to extrude the O-shaped sealing ring (4) by screwing the outer nut (6), so that the O-shaped sealing ring (4) clamps the reactor (7).
4. The novel gas-solid photocatalytic reactor according to claim 1, characterized in that: the lower three-way joint (3-1) is connected with the O-shaped sealing ring (4) in a tightened inclined structure, the outer nut (6) is in threaded connection with the lower three-way joint (3-1), and the outer nut (6) is screwed to push the PTFE pressing ring (5) to extrude the O-shaped sealing ring (4), so that the O-shaped sealing ring (4) clamps the reactor (7).
5. The novel gas-solid photocatalytic reactor according to claim 4, characterized in that: the top end of the thermocouple sleeve (13) is contacted with the bottom of the quartz sand plate (9).
6. A novel gas-solid photocatalytic reactor as defined in any one of claims 1-5, characterized by: a heating furnace (16) is arranged outside the reactor (7), a quartz rod (18) is arranged in the middle of the heating furnace (16), and the quartz rod (18) is a light source light-transmitting window.
7. The novel gas-solid photocatalytic reactor according to claim 6, characterized in that: the heating furnace (16) comprises a thermal inertia body (15) and heating furnace tiles (17), the thermal inertia body (15) is wrapped on the reactor (7), and the heating furnace tiles (17) are wrapped on the thermal inertia body (15).
8. The novel gas-solid photocatalytic reactor according to claim 1, characterized in that: the external connectors of the temperature control port (12), the air inlet (2), the exhaust port (11) and the liquid injection port (1) all adopt standard connectors; the liquid injection port (1) injects liquid or samples in a needle inserting mode.
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| CN201920970907.9U CN211070031U (en) | 2019-06-26 | 2019-06-26 | Novel gas-solid photocatalytic reactor |
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| CN201920970907.9U CN211070031U (en) | 2019-06-26 | 2019-06-26 | Novel gas-solid photocatalytic reactor |
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