CN113680207A - Gas-solid separation type automatic powder injection CO eliminating device and method - Google Patents
Gas-solid separation type automatic powder injection CO eliminating device and method Download PDFInfo
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- CN113680207A CN113680207A CN202111003096.3A CN202111003096A CN113680207A CN 113680207 A CN113680207 A CN 113680207A CN 202111003096 A CN202111003096 A CN 202111003096A CN 113680207 A CN113680207 A CN 113680207A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/864—Removing carbon monoxide or hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/502—Carbon monoxide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
A gas-solid separation type automatic powder spraying CO eliminating device and a method thereof are disclosed, the device comprises a storage tank, an automatic powder spraying control system, a protection cavity and a mesh-shaped spray nozzle, high-pressure gas is separated from CO catalyst powder by a rupture disk, the defects that the CO catalyst powder is easy to agglomerate and absorb moisture to inactivate in a high-pressure environment are overcome, and the suspension capacity of the catalyst powder in the air and the CO eliminating effect are improved; the shock wave receiving plate and the piezoelectric ceramic plate are used as device action trigger elements, so that the device is sensitive in response and high in reliability; when the device acts, the powder spraying driving gas is maintained at a high pressure for a long time, the CO catalyst powder spraying effect is effectively improved, the defect that the traditional powder sprayer is easy to cause powder loss is overcome, and CO toxic products can be effectively eliminated in explosion accidents. When explosion happens, the powder spraying control system is triggered by shock waves to spray CO catalyst powder instantly to form high-concentration catalyst powder cloud in the air, and CO gas is actively adsorbed and quickly oxidized into CO2And the CO toxic products are quickly and efficiently eliminated.
Description
Technical Field
The invention relates to the technical field of toxic gas purification, in particular to a gas-solid separation type automatic powder injection CO eliminating device and method.
Background
Places such as mines, tunnels, coal storage bins and the like are all limited spaces with potential explosion safety hazards. The explosion not only can generate explosion shock waves with huge destructive power, but also can generate a large amount of toxic carbon monoxide gas, so that trapped people are poisoned and die. For example, the number of deaths caused by coal mine gas and coal dust explosion accidents accounts for about 25% of the total deaths caused by coal mine accidents, and the number of deaths caused by CO poisoning accounts for more than 70% of the total deaths caused by explosion accidents. At present, measures such as a water shed, a rock dust shed and the like are arranged in a narrow and long limited space with potential explosion hazards, aiming at inhibiting the propagation speed and the explosion intensity of explosion flames, and the traditional methods can control the expansion of coal mine explosion disasters to a certain extent. In recent years, emerging technologies such as vacuum cavities, novel water curtain explosion suppression, gas flame-retardant explosion suppression systems, porous material explosion suppression and the like provide better methods for controlling explosion disasters, but no effective solution is provided for CO poisoning which is a key cause of casualties after explosion.
Disclosure of Invention
The technical problem is as follows: the invention aims to overcome the problem of eliminating CO toxic products in an explosion disaster and provides a device capable of quickly eliminating the CO toxic products in the explosion disaster.
The technical scheme is as follows: the invention relates to a gas-solid separation type automatic powder spraying CO eliminating device, which comprises a storage tank filled with CO catalyst powder, an automatic powder spraying control system, a protection cavity and a mesh jet orifice; the storage tank is connected with the protection cavity through a flange, a rupture disc and a horn-shaped structure which divide the storage tank into a gas storage cavity and a powder storage cavity are arranged in the storage tank, and CO catalyst powder is placed in the powder storage cavity; the front end of the powder storage cavity is provided with a normally closed electromagnetic valve I which is connected with the reticular jet orifice in a sealing way; a fixing plate is arranged at the center of the tail end of the gas storage cavity; the automatic powder spraying control system comprises a controller, a shock wave detector and a pressurizing gas supplementing tank which are arranged in a protection cavity, and the pressurizing gas supplementing tank is hermetically connected with a gas storage cavity through a normally closed electromagnetic valve II; the shock wave detector comprises a piezoelectric ceramic element arranged on the fixed plate and an insulating cylindrical body positioned beside the piezoelectric ceramic element, wherein the insulating cylindrical body is provided with a sleeve extending out of the protection cavity body, a pressure transmission rod is arranged in the sleeve, the outer end part of the pressure transmission rod is provided with a shock wave receiving plate, and a rod body of the pressure transmission rod is connected with the sleeve in a sliding manner; the signal input end of the controller is connected with the piezoelectric ceramic element through a signal line, and the signal output end of the controller is connected with the normally closed electromagnetic valve I and the normally closed electromagnetic valve II through a control line.
The large-diameter end of the horn-shaped structure is welded with the shell of the powder storage cavity into a whole, the small-diameter end extends to the gas storage cavity, and the diameter ratio of the small-diameter end to the large-diameter end is 0.2-0.5;
the small-diameter end of the horn-shaped structure is hermetically connected with the rupture disk flange.
The pressure relief pressure of the rupture disk is 1-1.5 MPa.
The insulating cylinder and the pressure transmission rod body (132) are in threaded connection, and the diameter of the insulating cylinder is not smaller than that of the piezoelectric ceramic piece and is 2-4 times of the diameter of the pressure transmission rod body.
The distance L between the front end of the insulating columnar body and the piezoelectric ceramic element1Is 10-40 cm, the length L of the rod body of the pressure transmission rod2And the length L of the sleeve3The relationship of (1) is: l is3>L1+L2So as to ensure that the insulating column can be tightly contacted with the piezoelectric ceramic element when the shock wave receiving plate is contacted with the tail end of the sleeve.
The pressurizing air supply tank is provided with a pressure gauge and an air charging hole, and the gas pressure in the pressurizing air supply tank is 5-10 MPa.
The gas pressure in the gas storage cavity is 0.2-0.5 MPa lower than the pressure relief pressure of the rupture disk, and the volume ratio of the gas storage cavity to the pressurizing and gas supplementing tank is 3-6: 1.
The gas-solid separation type automatic powder injection CO eliminating method using the device comprises the following steps: when an explosion accident occurs, shock waves generated impact the shock wave receiving plate, the shock wave receiving plate rapidly pushes the pressure transmission rod to the piezoelectric ceramic piece under the action of the shock waves, the piezoelectric ceramic piece is extruded by the insulating cylindrical body at the front end of the pressure transmission rod, and the piezoelectric ceramic piece immediately generates an electric signal and transmits the electric signal to the controller; the controller receives an electric signal and then sends a command to the normally closed solenoid valve I and the normally closed solenoid valve II through the control line, the two normally closed solenoid valves are opened, high-pressure gas in the pressurization gas supplementing tank is rapidly sprayed into the gas storage cavity through the normally closed solenoid valve I, when the pressure in the gas storage cavity exceeds the pressure relief pressure of the rupture disk, the rupture disk is instantaneously ruptured, the high-pressure gas in the gas storage cavity is sprayed into the powder storage cavity, CO catalyst powder in the powder storage cavity is sprayed into the air from the mesh-shaped spray opening under the driving of the high-pressure gas, high-concentration catalyst powder cloud is formed, and CO toxic products are rapidly and efficiently eliminated.
The active component of the CO catalyst in the powder storage cavity is transition metal oxide, the particle size is 20-200 mu m, the CO oxidation reaction rate is not lower than 0.1 mmol/(g.h) in an environment with 50-300 ℃ and 30-100% relative humidity RH, the calcination temperature is not lower than 300 ℃, and the CO catalyst powder needs to be activated at high temperature for more than 0.5 hour in the environment with 200-300 ℃ before being loaded into the powder storage cavity.
Has the advantages that: by adopting the technical scheme, the invention can effectively reduce the concentration of CO after explosion and avoid CO poisoning of risk-involved personnel. The high-pressure gas is separated from the CO catalyst powder by adopting the rupture disk, so that the defects that the CO catalyst powder is easy to agglomerate and absorb moisture to inactivate in a high-pressure environment are overcome, and the suspension capacity of the CO catalyst powder in the air and the CO elimination effect are improved; the shock wave receiving plate and the piezoelectric ceramic plate are used as device action trigger elements, so that the device is sensitive in response and high in reliability; the pressurization gas supplementing tank is arranged, so that the powder spraying driving gas is maintained at a high pressure for a long time when the device acts, the CO catalyst powder spraying effect is effectively improved, and the defect that the traditional powder sprayer is easy to cause powder loss is overcome. The concentration of carbon monoxide toxic products is greatly reduced after the fire explosion, more sufficient escape time is provided for trapped people, and the method is particularly suitable for places with explosion risks, such as mines, air holes, coal storage bins and the like. When explosion accident occurs, the device is immediately triggered to spray CO catalyst instantly under the action of shock waveThe catalyst powder forms high-concentration catalyst powder cloud in the air, actively absorbs CO gas and is rapidly oxidized into CO2The device realizes the quick and efficient elimination of CO toxic products, fills the blank of an active and efficient elimination technology of CO products in explosion accidents, and has the advantages of simple structure, simple and convenient operation, safety and reliability, and the main advantages are as follows:
1) the high-pressure gas is separated from the CO catalyst powder by using the rupture disk, so that the defects that the CO catalyst powder is easy to agglomerate and absorb moisture to inactivate in a high-pressure environment are overcome, and the suspension capacity of the catalyst powder in the air and the CO elimination effect are improved;
2) the shock wave receiving plate and the piezoelectric ceramic element are used as device action triggering elements, so that the device is sensitive in response and high in reliability;
3) the pressurization gas supplementing tank is arranged, so that the powder spraying driving gas is maintained at a high pressure for a long time when the device acts, the CO catalyst powder spraying effect is effectively improved, and the defect that the traditional powder sprayer is easy to cause powder loss is overcome.
Drawings
FIG. 1 is a schematic view of the overall structure of the gas-solid separation type automatic powder injection CO eliminating device of the present invention.
FIG. 2 is a left side view of the gas-solid separation type automatic powder injection CO eliminating device of the present invention.
In the figure: 1-CO catalyst powder; 2-a storage tank; 3-protecting the cavity; 4-a mesh jet orifice; 5-rupture disk; 6-electromagnetic valve I; 7-a controller; 8-a signal line; 9-control line; 10-pressurizing air supplement tank; 11-electromagnetic valve II; 12-a shock wave receiving plate; 13-a pressure transmission rod; 14-a sleeve; 15-a piezoelectric ceramic element; 16-pressure gauge; 17-a gas-filled hole; 21-a gas storage cavity; 22-a powder storage cavity; 131-insulating columns; 132-a pressure transmission rod body; 211-a fixing sheet; 221-horn structure; 222-housing of powder storage chamber.
Detailed Description
Embodiments of the invention are further described below with reference to the following drawings:
the invention relates to a gas-solid separation type automatic powder spraying CO eliminating device which mainly comprises a storage tank 2 filled with CO catalyst powder 1, an automatic powder spraying control system, a protection cavity 3 and a mesh-shaped spray opening 4; the storage tank2 is connected with the protection cavity 3 by a flange, a rupture disk 5 and a horn-shaped structure 221 which divide the storage tank 2 into two parts, namely a gas storage cavity 21 and a powder storage cavity 22, are arranged in the storage tank 2, and CO catalyst powder 1 is arranged in the powder storage cavity 22; the front end of the powder storage cavity 22 is provided with a normally closed electromagnetic valve I6 hermetically connected with the reticular jet orifice 4; the pressure of gas in the gas storage cavity 21 is 0.2-0.5 MPa lower than the pressure relief pressure of the rupture disk 5, and the volume ratio of the gas storage cavity 21 to the pressurizing gas supplementing tank 10 is 3-6: 1. The large-diameter end of the horn-shaped structure 221 is welded with the powder storage cavity shell 222 into a whole, the small-diameter end extends to the gas storage cavity 21, and the diameter ratio of the small-diameter end to the large-diameter end is 0.2-0.5; the small-diameter end of the horn-shaped structure 221 is in flange sealing connection with the rupture disk 5; the pressure relief pressure of the rupture disk 5 is 1-1.5 MPa. A fixing plate 211 is arranged at the center of the tail end of the air storage cavity 21; the automatic powder spraying control system comprises a controller 7, a shock wave detector and a pressurizing gas supplementing tank 10 which are arranged in a protection cavity 3, wherein a pressure gauge 16 and an inflation hole 17 are arranged on the pressurizing gas supplementing tank 10, and the gas pressure in the pressurizing gas supplementing tank 10 is 5-10 MPa. The pressurizing gas supplementing tank 10 is hermetically connected with the gas storage cavity 21 through a normally closed electromagnetic valve II 11; the shock wave detector comprises a piezoelectric ceramic element 15 arranged on a fixing plate 211 and an insulating cylindrical body 131 positioned beside the piezoelectric ceramic element 15, wherein the insulating cylindrical body 131 is in threaded connection with a pressure transmission rod body 132, and the diameter of the insulating cylindrical body 131 is not smaller than that of the piezoelectric ceramic piece 15 and is 2-4 times that of the pressure transmission rod body 132. A sleeve 14 extending out of the protection cavity 3 is arranged on the insulating cylindrical body 131, a pressure transmission rod 13 is arranged in the sleeve 14, a shock wave receiving plate 12 is arranged at the outer end part of the pressure transmission rod 13, and a rod body 132 of the pressure transmission rod is connected with the sleeve 14 in a sliding manner; the signal input end of the controller 7 is connected with the piezoelectric ceramic element 15 through a signal line 8, and the signal output end of the controller 7 is connected with the normally closed electromagnetic valve I6 and the normally closed electromagnetic valve II 11 through a control line 9. The distance L between the front end of the insulating column 131 and the piezoelectric ceramic element 151Is 10-40 cm, the length L of the rod body 132 of the pressure transmission rod2And is greater than the length L of the sleeve 143The relationship is as follows: l is3>L1+L2So that the insulating cylinder 131 can contact the piezoelectric element when the shock wave receiving plate 12 is in contact with the end of the sleeve 14The ceramic elements 15 are in close contact.
The invention relates to a gas-solid separation type automatic powder injection CO elimination method, which comprises the following steps: when an explosion accident occurs, the generated shock wave impacts the shock wave receiving plate 12, the shock wave receiving plate 12 rapidly pushes the pressure transmission rod 13 towards the piezoelectric ceramic piece 15 under the action of the shock wave, the insulating cylindrical body 131 at the front end of the pressure transmission rod 13 is forced to extrude the piezoelectric ceramic piece 15, and the piezoelectric ceramic piece 15 immediately generates an electric signal and transmits the electric signal to the controller 7; the controller 7 receives an electric signal and then sends out commands to the normally closed solenoid valve I6 and the normally closed solenoid valve II 11 through the control line 9, the two normally closed solenoid valves are opened, high-pressure gas in the pressurization gas supplementing tank 10 is rapidly sprayed into the gas storage cavity 21 through the normally closed solenoid valve I6, when the pressure in the gas storage cavity 21 exceeds the pressure relief pressure of the rupture disk 5, the rupture disk 5 is instantaneously ruptured, the high-pressure gas in the gas storage cavity 21 is sprayed to the powder storage cavity 22, CO catalyst powder 1 in the powder storage cavity 22 is sprayed into the air from the mesh-shaped spray opening 4 under the drive of the high-pressure gas, high-concentration catalyst powder cloud is formed, and the CO toxic products are rapidly and efficiently eliminated.
The active component of the CO catalyst 1 placed in the powder storage cavity 22 is transition metal oxide, the particle size is 20-200 mu m, the CO oxidation reaction rate is not lower than 0.1 mmol/(g.h) in an environment with 50-300 ℃ and 30-100% relative humidity RH, the calcination temperature is not lower than 300 ℃, and the CO catalyst powder 1 needs to be activated at high temperature for more than 0.5 hour in the environment with the temperature of 200-300 ℃ before being loaded into the powder storage cavity 22.
The first embodiment,
The gas-solid separation type automatic powder injection CO eliminating device has the following relevant design parameters: the volume of the powder storage cavity is 3L, and the filling amount of CO catalyst powder is 5 kg; the volume of the gas storage cavity is 2L, and the design pressure of the gas is 1 MPa; the volume of the pressurizing air supplement tank is 0.5L, and the design pressure of the air is 7 MPa; the diameter of the selected rupture disk is 10cm, and the pressure relief pressure is 1.2 MPa; the diameter of the selected piezoelectric ceramic element is 2.5cm, and the piezoelectric ceramic element is stuck on the fixing plate by using insulating glue; the diameter of the rod body of the pressure transmission rod is 1cm, the diameter of the insulating columnar body is 3cm, and the section of the shock wave receiving plate is a rectangle of 20cm multiplied by 20 cm; the length of the rod body of the pressure transmission rod is designed to be 3m, the diameter of the sleeve is designed to be 2.7m, and the distance between the insulating cylinder and the piezoelectric ceramic element is 20 cm.
The selected CO catalyst powder 1 is prepared as follows:
a. adding copper acetate and cobalt acetate into an ethylene glycol solvent according to a ratio, and stirring for half an hour at room temperature;
b. under the protection of nitrogen flow and continuous stirring, adding 0.2mol/L sodium carbonate solution into the solution obtained in the step a, and continuously stirring the obtained mixed solution for 1 hour; the molar ratio of the copper acetate to the cobalt acetate to the ethylene glycol to the sodium carbonate is 2:5:230: 13;
c. repeatedly washing the obtained solid precipitate with deionized water and anhydrous ethanol for several times, and drying in a drying oven at 60 deg.C for 12 hr under vacuum; calcining the dried solid in a muffle furnace for 2 hours to obtain catalyst powder, wherein the calcining temperature is 300 ℃;
d. and d, grinding the catalyst powder obtained in the step c for 2 hours by using a planetary ball mill, and sieving by using 80-mesh and 200-mesh sieves, wherein the 80-200-mesh catalyst powder is the CO catalyst powder to be used.
The CO catalytic oxidation activity of the CO catalyst powder 1 is carried out in a fixed catalyst bed, and the performance evaluation conditions of the CO catalyst powder 1 are as follows: the introduced reaction gas is 1% CO/20% O2/79％N2The flow rate of the mixed gas is 200mL/min, the usage amount of the catalyst is 300mg, the reaction temperature is set to be 50-300 ℃, and the gas humidity is 40% RH. The experimental result shows that the prepared copper-cobalt composite metal oxide catalyst can oxidize 16% of CO into CO at 50 DEG C2CO can be completely oxidized at 110-300 ℃. Therefore, the CO oxidation reaction rate of the catalyst is more than 2.86 mmol/(g.h) in an environment with the temperature of 50-300 ℃ and the RH of 40 percent.
The performance of the device was tested in a full-scale experimental tunnel with a 3.2m x 3m rectangular cross-section and a length of 200m, in which 8m was placed3An explosion chamber. The gas-solid separation type automatic powder spraying CO eliminating device is horizontally fixed at the top of a roadway, the shock wave receiving plate faces to an explosion cavity, and the distance between the shock wave receiving plate and the explosion cavity is 50 m. Will be 0.5m3Methane fill 8m3And an explosion cavity which is detonated by using a high-energy igniter and serves as an explosion source. Experimental results show that after methane is detonated, the device triggers to act within 32ms and quickly sprays methaneAnd CO catalyst powder is shot to form high-concentration catalyst powder cloud, and the concentration of carbon monoxide is instantly eliminated from 2432ppm to within 315 ppm.
Example II,
Basically the same as the first embodiment, except that: different CO catalyst powder, the preparation process of the CO catalyst powder 1 is as follows:
a. adding cobalt acetate into ethylene glycol solvent, continuously stirring, and heating to 160 ℃;
b. under the protection of nitrogen flow, adding 0.2mol/L sodium carbonate solution into the solution in the step a, and continuously stirring the obtained mixed solution for 1 hour; the molar ratio of the cobalt acetate to the ethylene glycol to the sodium carbonate is 1:100: 1.4;
c. repeatedly washing the obtained solid precipitate with deionized water and anhydrous ethanol for several times, and drying in a drying oven at 60 deg.C for 12 hr under vacuum; calcining the dried solid in a muffle furnace for 2 hours to obtain catalyst powder, wherein the calcining temperature is 450 ℃;
d. and d, grinding the CO catalyst powder obtained in the step c for 2 hours by using a planetary ball mill, and sieving by using 80-mesh and 200-mesh sieves, wherein the 80-200-mesh catalyst powder is the CO catalyst powder to be used.
The CO catalytic oxidation activity test result shows that the prepared CO catalyst powder can oxidize 23 percent of CO into CO at 50 DEG C2And CO can be completely oxidized at 80-300 ℃. Therefore, the CO oxidation reaction rate of the CO catalyst powder is more than 4.1 mmol/(g.h) in an environment with the temperature of 50-300 ℃ and the RH of 40 percent; explosion experiment results show that the device can instantaneously eliminate the concentration of carbon monoxide from 2432ppm to 214 ppm.
Claims (10)
1. A gas-solid separation type automatic powder spraying CO eliminating device is characterized in that: comprises a storage tank (2) filled with CO catalyst powder (1), an automatic powder spraying control system, a protection cavity (3) and a reticular jet orifice (4); the storage tank (2) is connected with the protection cavity (3) through a flange, a rupture disc (5) and a horn-shaped structure (221) which divide the storage tank (2) into a gas storage cavity (21) and a powder storage cavity (22) are arranged in the storage tank (2), and the CO catalyst powder (1) is arranged in the powder storage cavity (22); the front end of the powder storage cavity (22) is provided with a normally closed electromagnetic valve I (6) which is hermetically connected with the reticular jet orifice (4); a fixing plate (211) is arranged at the center of the tail end of the air storage cavity (21); the automatic powder spraying control system comprises a controller (7), a shock wave detector and a pressurizing gas supplementing tank (10) which are arranged in a protection cavity (3), wherein the pressurizing gas supplementing tank (10) is hermetically connected with a gas storage cavity (21) through a normally closed electromagnetic valve II (11); the shock wave detector comprises a piezoelectric ceramic element (15) arranged on a fixing plate (211) and an insulating cylindrical body (131) positioned beside the piezoelectric ceramic element (15), wherein a sleeve (14) extending out of a protection cavity (3) is arranged on the insulating cylindrical body (131), a pressure transmission rod (13) is arranged in the sleeve (14), a shock wave receiving plate (12) is arranged at the outer end part of the pressure transmission rod (13), and a rod body (132) of the pressure transmission rod is connected with the sleeve (14) in a sliding manner; the signal input end of the controller (7) is connected with the piezoelectric ceramic element (15) through a signal line (8), and the signal output end of the controller (7) is connected with the normally closed electromagnetic valve I (6) and the normally closed electromagnetic valve II (11) through a control line (9).
2. The gas-solid separation type automatic powder injection CO eliminating device according to claim 1, characterized in that: the large-diameter end of the horn-shaped structure (221) is welded with the powder storage cavity shell (222) into a whole, the small-diameter end extends to the gas storage cavity (21), and the diameter ratio of the small-diameter end to the large-diameter end is 0.2-0.5.
3. A gas-solid separation type automatic powder injection CO removing device according to claim 2, characterized in that: the small-diameter end of the horn-shaped structure (221) is connected with the rupture disk (5) in a flange sealing manner.
4. The gas-solid separation type automatic powder injection CO eliminating device according to claim 1, characterized in that: the pressure relief pressure of the rupture disk (5) is 1-1.5 MPa.
5. The gas-solid separation type automatic powder injection CO eliminating device according to claim 1, characterized in that: the insulating cylinder (131) and the pressure transmission rod body (132) are in threaded connection, and the diameter of the insulating cylinder (131) is not smaller than that of the piezoelectric ceramic piece (15) and is 2-4 times of that of the pressure transmission rod body (132).
6. A gas-solid separation type automatic powder injection CO eliminating device according to claim 1 or 5, characterized in that: the distance L between the front end of the insulating column body (131) and the piezoelectric ceramic element (15)1Is 10-40 cm, the length L of the rod body (132) of the pressure transmission rod2And the length L of the sleeve (14)3The relationship of (1) is: l is3>L1+L2So as to ensure that the insulating columnar body (131) can be tightly contacted with the piezoelectric ceramic element (15) when the shock wave receiving plate (12) is contacted with the tail end of the sleeve (14).
7. The gas-solid separation type automatic powder injection CO eliminating device according to claim 1, characterized in that: the pressurizing air supplementing tank (10) is provided with a pressure gauge (16) and an air charging hole (17), and the gas pressure in the pressurizing air supplementing tank (10) is 5-10 MPa.
8. The gas-solid separation type automatic powder injection CO eliminating device according to claim 1, characterized in that: the pressure of gas in the gas storage cavity (21) is 0.2-0.5 MPa lower than the pressure relief pressure of the rupture disk (5), and the volume ratio of the gas storage cavity (21) to the pressurizing gas supplementing tank (10) is 3-6: 1.
9. A gas-solid separation type automatic powder injection CO elimination method using the device of claim 1, which is characterized in that: when explosion accidents happen, shock waves generated impact the shock wave receiving plate (12), the shock wave receiving plate (12) rapidly pushes the pressure transmission rod (13) to the piezoelectric ceramic piece (15) under the action of the shock waves, the insulating cylindrical body (131) at the front end of the pressure transmission rod (13) is forced to extrude the piezoelectric ceramic piece (15), and the piezoelectric ceramic piece (15) immediately generates an electric signal and transmits the electric signal to the controller (7); the controller (7) receives an electric signal and then sends a command to the normally closed solenoid valve I (6) and the normally closed solenoid valve II (11) through the control line (9), the two normally closed solenoid valves are opened, high-pressure gas in the pressurization gas supplementing tank (10) is rapidly sprayed into the gas storage chamber (21) through the normally closed solenoid valve I (6), when the pressure in the gas storage chamber (21) exceeds the pressure relief pressure of the rupture disk (5), the rupture disk (5) is instantaneously ruptured, the high-pressure gas in the gas storage chamber (21) is sprayed to the powder storage chamber (22), CO catalyst powder (1) in the powder storage chamber (22) is sprayed into the air from the net-shaped spray opening (4) under the driving of the high-pressure gas, high-concentration catalyst powder cloud is formed, and CO toxic products are rapidly and efficiently eliminated.
10. The gas-solid separation type automatic powder injection CO elimination method of claim 9, characterized in that: the active component of the CO catalyst (1) in the powder storage cavity (22) is transition metal oxide, the particle size is 20-200 mu m, the CO oxidation reaction rate is not lower than 0.1 mmol/(g.h) in an environment with 50-300 ℃ and 30-100% relative humidity RH, the calcination temperature is not lower than 300 ℃, and the CO catalyst powder (1) needs to be activated at high temperature for more than 0.5 hour in the environment with the temperature of 200-300 ℃ before being loaded into the powder storage cavity (22).
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| CN114136165A (en) * | 2021-12-15 | 2022-03-04 | 中国矿业大学 | Efficient synchronous elimination method for CO products in blasting operation |
| CN114177559A (en) * | 2021-12-15 | 2022-03-15 | 中国矿业大学 | Fire CO synchronous disposal method coupling suffocation fire extinguishing and catalytic oxidation |
| CN114249168A (en) * | 2021-12-01 | 2022-03-29 | 姚艳平 | Anti-adhesion folding collecting device for inflatable slide |
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