CN201454524U - Plasma coal cracking reaction device involving flow-shading components - Google Patents
Plasma coal cracking reaction device involving flow-shading components Download PDFInfo
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- CN201454524U CN201454524U CN2009201063892U CN200920106389U CN201454524U CN 201454524 U CN201454524 U CN 201454524U CN 2009201063892 U CN2009201063892 U CN 2009201063892U CN 200920106389 U CN200920106389 U CN 200920106389U CN 201454524 U CN201454524 U CN 201454524U
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Abstract
The utility model belongs to a plasma coal cracking reaction device involving flow-shading components in the field of chemical equipment. The reaction device comprises a plasma torch anode, a plasma torch cathode, a plasma torch cathode and anode intersection area, a plasma torch anode working gas inlet, a plasma torch cathode working gas inlet, a mixing area, a pulverized coal injection pipe, a reaction area, a reaction area wall surface, a reaction area material gas injection pipe, a quenching area, a quenching area medium injection pipe and a quenching area outlet; and the flow-shading components are arranged in the mixing area, the reaction area or the quenching area. The flow-shading components are arranged in the high-temperature and high flow-rate reaction device provided by the utility model, therefore, the spatial distribution of fluids is changed, the injection depth of filled materials is increased, the contact and mixing efficiency of reactants is enhanced, and the purpose of increasing the coal change and the heat change capabilities of a coal cracking device is achieved.
Description
Technical field
The utility model belongs to a kind of coal plasma pyrolysis reaction unit that hides the stream member that relates in chemical industry equipment field.
Background technology
Acetylene is important basic Organic Chemicals.The commercial run of producing acetylene mainly contains carbide, methane portion oxidation method and methane electrocracking method, and wherein carbide acetylene technical maturity accounts for absolute ratio in the industrial production, but pollutes all relative with energy consumption higher.
Coal plasma pyrolysis system acetylene is a direct chemical industry path for transformation of new, promising coal, correlative study starts from the Britain Sheffield university of the sixties in 20th century: in the arc heat plasma jet of high temperature, Gao Han, high reaction activity, the volatile matter of coal even fixed carbon can be converted into acetylene.After this, a large amount of researchs concentrate on countries such as Britain, the U.S., Germany, India, the former Soviet Union.Chinese scholar and engineers and technicians have carried out a large amount of basic research and engineering research since the nineties in this field.Because China's petroleum resources is deficient relatively, and coal resource is abundant, so coal plasma pyrolysis system acetylene process has important potential industrial prospect as a kind of cleaning and the short coal conversion process of flow process aspect the chemical utilization of coal.
U.S. AVCO company has finished the test of 1MW level commercial plant in 1980, the plasma torch input power is 807kW, makes water do quenching medium, and per-unit production energy consumption was a 10.5kWh/kg acetylene before gas separated.Germany Huels company and Bergbau Forschung GmbH company (Germany mining research company, existing name DMT) in the cooperation eighties, have built up and have tested the pilot-plant of 1.25MW, and obtained per-unit production energy consumption is 14～16kWh/kg acetylene.
2007, the pilot plant test that Xinjiang of China sky industry group carries out on the 2MW apparatus platform, on the operation of high power plasma torch long-life and two key technologies of reactor coke cleaning, obtained key progress, the best index of acetylene energy consumption reached 10.5kWh/kg acetylene before gas separated, take into account separating energy consumption 4.0kWh/kg, be lower than the comprehensive energy consumption 15.0kWh/kg acetylene that the outer carbide of pollution abatement costs is produced acetylene.2008, group of Xingjiang Tianye Co. builds up maximum in the world 5MW commerical test device, single operation is moved more than 10 hours continuously under normal start-stop car situation, the accumulation driving time reached more than 500 hours, cracking gas flow and acetylene content reach the economy requirement, are expected to realize in a short time ton acetylene industrialized technology.
There is general character in the experimental rig that domestic and international different research institution adopted aspect system's formation, device mainly comprises 3 common parts, i.e. plasma producing apparatus, reactor (comprise and mixing and conversion zone), chilling and separator.Experimental rig adopts the direct-current arc hot plasma more, can roughly be divided into two classes according to coal with the different of hydrogen raw material hybrid position: mix behind mixing and the generating means before the generating means.The rotating the arc experimental provision of AVCO company adopts the former, does the cracking of raw material for gaseous state, liquefied hydrocarbon and also adopts the former more.Though mix before the generating means, exactly be that reactant enters arc region, the heating that helps raw material with mix, can obtain high acetylene yield, easy damaged electrode, and apparatus structure is complicated.Most experimental rig all adopts the latter, but has therefore increased the difficulty that coal dust and plasma jet are obtained good mixed effect; This speed mainly due to plasma jet is very big, and the incidence rate of coal dust is then much lower, and the incident degree of depth of coal dust in the high speed plasma jet is restricted, and this contradiction will more highlight when reaction unit is carried out the engineering amplification.
Coal cracking reaction device to hybrid operational mode behind the above-mentioned using plasma generating means, because coal dust is main intensive in the periphery of hot plasma, and the high-grade heat energy of hot plasma central area is not fully used, and causes energy utilization efficiency lower thus.
The utility model content
The purpose of this utility model is the weak point that exists at above-mentioned existing coal plasma pyrolysis reaction unit, mainly hide the stream member by in reaction unit, setting up, change the spatial distribution form of high temperature, high speed plasma, being convenient to solid material or gas material is injected into the plasma central area and promptly has the more zone of high-energy quality, contact between the intensified response thing and mixing efficiency, and then reach the final purpose that improves conversion of coal cracker coal and thermal transition ability.
For realizing above-mentioned target, the technical scheme that the utility model adopted specifically comprises:
The described coal plasma pyrolysis reaction unit that hides the stream member that relates to comprises: plasma torch anode working gas access, plasma torch negative electrode working gas inlet, plasma torch anode, plasma torch negative electrode and the plasmatorch anode and cathode district that crosses; Coal dust playpipe and mixed zone; Reaction zone, reaction zone wall and reaction zone unstripped gas playpipe; The quenching medium playpipe, quench zone and quench zone outlet is characterized in that, are provided with to hide the stream member in mixed zone, reaction zone or quench zone.
Be provided with in the described mixed zone and hide the stream member and settle 4～16 hollow pipelines for 1～20mm distance directly over 4～16 coal dust playpipes in the mixed zone, pipeline enclosure adopts hollow straight tube or bend pipe parts to connect in couples, form 2～8 groups of separate mixed zones and hide the stream members, an end that hides the stream member in the mixed zone is that the mixed zone hides that the cooling medium inlet other end is that the mixed zone hides cooling medium outlet in the stream member in the stream member.
Be provided with in the described reaction zone and hide the stream member and settle 4～16 hollow pipelines for 1～30mm distance directly over 4～16 unstripped gas playpipes in reaction zone, pipeline enclosure adopts hollow straight tube or bend pipe parts to connect in couples, form 2～8 groups of separate reaction zones and hide the stream member, an end that hides the stream member at reaction zone is that reaction zone hides cooling medium inlet in the stream member, and the other end is that reaction zone hides cooling medium outlet in the stream member.
Be provided with in the described quench zone and hide the stream member and settle 6～32 hollow pipelines for 1～30mm distance directly over 6～32 quenching medium playpipes in quench zone, pipeline enclosure adopts hollow straight tube or bend pipe parts to connect in couples, form 3～16 groups of separate quench zones and hide the stream member, an end that hides the stream member at quench zone is that quench zone hides cooling medium inlet in the stream member, and the other end is that quench zone hides cooling medium outlet in the stream member.
Described plasma is a kind of in DC arc plasma, high-frequency plasma or the microwave plasma.
Described plasma torch working gas is one or more in hydrogen, nitrogen, oxygen and the steam.
Described coal dust is a kind of in the pulverulent mixture of the pulverulent mixture of solid coal dust, coal and living beings or coal and petroleum coke.
Described hollow pipeline is by a kind of the making in gold, silver or the copper material.
Described cooling medium is a kind of in water under high pressure, salt solution, buck or the machine oil.
The utlity model has following advantage:
(1) hides the incident degree of depth that the stream member can significantly strengthen the material jet, contact between the intensified response thing and mixing efficiency, but in the efficient hardening mixed zone coal and plasma mix and reaction, reaction zone replenish quenching medium in mixing of raw material and reaction logistics and reaction and the quench zone and react after the mixing and reaction of logistics;
(2) for the coal plasma pyrolysis reaction unit that this screening stream member has been installed, the coal of system transforms and the thermal transition ability can both significantly get a promotion;
(3) the material jet can be convenient to carry out the engineering amplification design of coal plasma pyrolysis reaction unit to the central area of plasma jet/reaction logistics under the effect of screening of this screening stream member.
Description of drawings
Fig. 1 a is not for there being the coal plasma pyrolysis reaction unit schematic diagram that hides the stream member;
Fig. 1 b is the A-A cutaway view of reaction unit mixed zone among Fig. 1 a;
Fig. 1 c is the B-B cutaway view of reaction unit reaction zone among Fig. 1 a;
Fig. 1 d is the C-C cutaway view of reaction unit quench zone among Fig. 1 a;
Fig. 2 a is that the coal plasma pyrolysis reaction modifying device schematic diagram that hides the stream member is adopted in the mixed zone;
Fig. 2 b is the D-D cutaway view of modifying device mixed zone among Fig. 2 a;
Fig. 3 a is that mixed zone and reaction zone adopt the coal plasma pyrolysis reaction modifying device schematic diagram that hides the stream member;
Fig. 3 b is the E-E cutaway view of modifying device reaction zone among Fig. 3 a;
Fig. 4 a is that mixed zone, reaction zone and quench zone adopt the coal plasma pyrolysis reaction modifying device schematic diagram that hides the stream member;
Fig. 4 b is the F-F cutaway view of modifying device quench zone among Fig. 4 a.
Among the figure: 1-plasma torch anode working gas access, 2-plasma torch negative electrode working gas inlet, 3-plasma torch anode, 4-plasma torch negative electrode, the 5-plasma torch anode and cathode district that crosses, the signal of 6-gas phase flow field flow velocity size, 7-coal dust playpipe, 8-coal dust be the movement locus signal in the mixed zone, the 9-mixed zone, the 10-reaction zone, 11-reaction zone wall, 12-reaction zone unstripped gas playpipe, 13-quenching medium playpipe, the 14-quench zone, the outlet of 15-quench zone, the 16-mixed zone hides the stream member, the 17-mixed zone hides cooling medium inlet in the stream member, the 18-mixed zone hides cooling medium outlet in the stream member, and the 19-reaction zone hides the stream member, and the 20-reaction zone hides cooling medium inlet in the stream member, the 21-reaction zone hides cooling medium outlet in the stream member, the 22-quench zone hides the stream member, and the 23-quench zone hides cooling medium inlet in the stream member, and the 24-quench zone hides cooling medium outlet in the stream member.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is further described, the utility model is not carried out any restriction.
Fig. 1 a is not for there being the coal plasma pyrolysis reaction unit schematic diagram that hides the stream member, Fig. 1 b is the A-A cutaway view of reaction unit mixed zone among Fig. 1 a, Fig. 1 c is the B-B cutaway view of reaction unit reaction zone among Fig. 1 a, and Fig. 1 d is the C-C cutaway view of reaction unit quench zone among Fig. 1 a.As shown in Figure 1a, not having the coal plasma pyrolysis reaction unit that hides the stream member comprises: plasma torch anode working gas access 1, plasma torch negative electrode working gas inlet 2, plasma torch anode 3, plasma torch negative electrode 4 and plasmatorch anode and cathode cross and distinguish 5; Mixed zone 9 and coal dust playpipe 7; Reaction zone 10, reaction zone wall 11 and reaction zone unstripped gas playpipe 12; Quench zone 14, quenching medium playpipe 13 and quench zone outlet 15.
Plasma torch adopts hydrogen as working gas, and input power is 3.8～4.2MW, and hydrogen flowing quantity is 100～110kg/h, and the plasma torch anode and cathode crosses, and the mean temperature of hydrogen plasmas surpasses 3000K, the about 5000K of central area temperature in the district 5.Reaction zone internal diameter 150mm, long 500mm.
Do not settle when hiding the stream member, the speed of hydrogen plasma jet is 300～1200m/s in the mixed zone 9, and 9 exits, mixed zone are the undergauge structure, the about 1000m/s of maximal rate; The coal dust total flux is 1300～2000kg/h, and the speed of efflux that forms after coal dust playpipe 7 injections of coal dust by external diameter 10mm, internal diameter 9mm is 10～40m/s, and the incident degree of depth of coal dust is limited, only can contact with 20～30% plasma.
2～3mm distance is settled 6 external diameter 8mm directly over the 9 interior 6 coal dust playpipes 7 of the mixed zone of said apparatus; the hollow copper pipe of internal diameter 6mm; the length that copper pipe probes into the mixed zone part is 50mm; adjacent copper pipe adopts the hollow bend part to connect; form the fusing point of 3 groups of temperature after the separate mixed zones screening stream member 16. coal cracking process plasmas generation greater than copper material; requirement based on long-term operation under the working environment of high-temperature plasma; hiding the stream member and need the supporting design that built-in cooling medium heat conduction is protected. each is organized and leads to water under high pressure in the member as cooling medium; water under high pressure is entered by cooling medium inlet 17 in the mixed zone screening stream member; carrying by cooling medium outlet 18 derivation (Fig. 2) in the mixed zone hides the stream member after the heat of copper pipe inwall conduction of copper pipe outer wall. Fig. 2 a is that the coal plasma pyrolysis reaction modifying device schematic diagram that hides the stream member is adopted in the mixed zone, and Fig. 2 b is the D-D cutaway view of modifying device mixed zone among Fig. 2 a.
Shown in Fig. 2 a, settle the mixed zone to hide after the stream member 16, plasma jet is subjected to the inhibition of member to be divided into four stock jets, divides jet to move down 15～25mm interflow afterwards; Form the zone of screening that gas phase velocity is lower than coal dust speed of efflux, wide about 8mm, high about 15mm under hiding the stream member, coal dust can successfully be transported to the whole zone of screening, the contact area of coal dust and plasma increases 5～15 times, significantly strengthened contact and mixing efficiency between the reactant, the coal that has effectively improved the coal cracker transforms and the thermal transition ability.
For protection hides the material that flows member, move the heat loss to some extent that heat will cause plasma through cooling medium.Among the design in the mixed zone 9 every group of hot speed of moving that hide the stream members be no more than 40kW, total losses is no more than 120kW (total power input 3%).
Embodiment 2
This example is set up reaction zone based on the coal plasma pyrolysis reaction unit after improving among the embodiment 1 and is hidden the stream member.
Under embodiment 1 described process conditions, the reaction zone mean temperature is 1800～2500K, this temperature generates than acetylene and the minimum temperature 1400K of stable existence wants high, enter reaction zone by the additional material mixed gas of light aromatic fraction and propane in the reaction zone unstripped gas playpipe 12 injection coal tar of 4 external diameter 6mm, internal diameter 5mm and participate in cracking reaction, make full use of the heat of reaction zone, simultaneously the hydrocarbon mass ratio of gaseous mixture reach 5: 1～10: 1, help improving the volumetric concentration of acetylene in the product gas.
Do not settle when hiding the stream member, the speed of reaction zone 10 internal reaction logistics is 200～400m/s, the speed of efflux of replenishing material mixed gas formation after reaction zone unstripped gas playpipe 12 sprays is 40～80m/s, and its incident degree of depth is not ideal enough, is 20～40% with the ratio that contacts of reacting logistics.
In the present embodiment, the 2mm distance is settled the hollow copper pipe of 4 external diameter 8mm, internal diameter 6mm directly over described 4 unstripped gas playpipes 12, the length that copper pipe probes into the mixed zone part is 50mm, adjacent copper pipe adopts the hollow bend part to connect, form 2 groups of separate reaction zones and hide stream member 19, each is organized and leads to water under high pressure in the member as cooling medium, water under high pressure is hidden by reaction zone that cooling medium inlet 20 enters in the stream member, carries by cooling medium outlet 21 derivation (Fig. 3) in reaction zone hides the stream member after the heat of copper pipe inwall conduction of copper pipe outer wall.Fig. 3 a is that mixed zone and reaction zone adopt the coal plasma pyrolysis reaction modifying device schematic diagram that hides the stream member, and Fig. 3 b is the E-E cutaway view of modifying device reaction zone among Fig. 3 a.
Shown in Fig. 3 a, to settle after the reaction zone screening stream member 19, the reaction logistics is subjected to the inhibition of member to be divided into three stock jets, and the branch jet collaborates after moving down 10～20mm; Form the lower zone of screening of pressure under hiding the stream member, the incident degree of depth of gaseous mixture is brought up to 60～70mm by 30～40mm, gaseous mixture increases 4～10 times with the contact area of reaction logistics, significantly strengthened contact and mixing efficiency between the reactant, the coal that has effectively improved the coal cracker transforms and the thermal transition ability.
Among the design, every group of hot speed of moving that hide the stream members are no more than 20kW in the reaction zone 10, and total losses is no more than 40kW (total power input 1%).
This example is set up quench zone based on the coal plasma pyrolysis reaction unit after improving among the embodiment 2 and is hidden the stream member.Under embodiment 2 described process conditions, the quench zone inlet temperature is 1400～1800K, is quenching medium with water, and moment will be reacted logistics and is cooled to 600～800K.The rate of temperature fall of 107～108K/s is first necessary condition that guarantees preparing ethyne by cracking plasma coal process acetylene yield; Quenching medium is second necessary condition that guarantees acetylene yield with fully contacting of reaction logistics.
Do not settle when hiding the stream member, the speed of quench zone 14 internal reaction logistics is 150～300m/s, the speed of efflux that forms after quenching medium playpipe 13 injections of water by 8 external diameter 5mm, internal diameter 4mm is 60～100m/s, is 60～70% with the ratio that contacts of reacting logistics.
In the present embodiment, the 4mm distance is settled the hollow copper pipe of 8 external diameter 8mm, internal diameter 6mm directly over described 8 quenching medium playpipes 13, the length that copper pipe probes into the mixed zone part is 70mm, adjacent copper pipe adopts the hollow bend part to connect, form 4 groups of separate quench zones and hide stream member 22, each is organized and leads to water under high pressure in the member as cooling medium, water under high pressure is hidden by quench zone that cooling medium inlet 23 enters in the stream member, carries by cooling medium outlet 24 derivation (Fig. 4) in quench zone hides the stream member after the heat of copper pipe inwall conduction of copper pipe outer wall.Fig. 4 a is that mixed zone, reaction zone and quench zone adopt the coal plasma pyrolysis reaction modifying device schematic diagram that hides the stream member, and Fig. 4 b is the F-F cutaway view of modifying device quench zone among Fig. 4 a.
Shown in Fig. 4 a, settle quench zone to hide after the stream member 22, the reaction logistics is subjected to the inhibition of member to be divided into five stock jets.On the one hand, the existence of member has increased the boundary area of reaction logistics, helps improving its rate of temperature fall; On the other hand, quenching medium is elevated to 80～95% because the interaction energy of screening of member is ejected into the central area with the ratio that contacts of reaction logistics, has guaranteed quenching medium and has reacted fully contacting of logistics.The introducing that quench zone hides the stream member makes that the volumetric concentration of acetylene brings up to 8.5～9.0% from 8.0～8.5% in the product gas.
Among the design, every group of hot speed of moving that hides the stream member is no more than 5kW in the quench zone, and total losses is no more than 40kW (total power input 1%).
All be provided with in mixed zone 9, reaction zone 10 or quench zone 14 in the present embodiment and hide the stream member, do not compare with there being the coal plasma pyrolysis reaction unit that hides the stream member, under the identical situation of other process conditions, cracking product gas is from 2300～2600Nm
3/ h brings up to 3200～3500Nm
3/ h, the volumetric concentration of acetylene brings up to 8.5～9.0% from 7.0～7.5% in the product gas, and the specific energy consumption index is optimized to 11～13kWh/kg acetylene from 18～20kWh/kg acetylene.
Claims (9)
1. a coal plasma pyrolysis reaction unit that relates to screening stream member comprises: plasma torch anode working gas access (1), plasma torch negative electrode working gas inlet (2), plasma torch anode (3), plasma torch negative electrode (4) and the plasma torch anode and cathode district (5) that crosses; Coal dust playpipe (7) and mixed zone (9); Reaction zone (10), reaction zone wall (11) and reaction zone unstripped gas playpipe (12); Quenching medium playpipe (13), quench zone (14) and quench zone outlet (15) is characterized in that, are provided with to hide the stream member in mixed zone (9), reaction zone (10) or quench zone (14).
2. device according to claim 1, it is characterized in that, be provided with in the described mixed zone (9) and hide the stream member and be 4～16 hollow pipelines of 1～20mm distance arrangement directly over 4～16 coal dust playpipes (7) mixed zone (9) in, pipeline enclosure adopts hollow straight tube or bend pipe parts to connect in couples, form 2～8 groups of separate mixed zones and hide stream members (16), an end that hides stream member (16) in the mixed zone is that to hide in the stream member cooling medium inlet (17) other end be that the mixed zone hides that cooling medium exports (18) in the stream member in the mixed zone.
3. device according to claim 1, it is characterized in that, be provided with in the described reaction zone (10) and hide the stream member and be 4～16 hollow pipelines of 1～30mm distance arrangement directly over 4～16 unstripped gas playpipes (12) reaction zone (10) in, pipeline enclosure adopts hollow straight tube or bend pipe parts to connect in couples, form 2～8 groups of separate reaction zones and hide stream member (19), an end that hides stream member (19) at reaction zone is that reaction zone hides cooling medium inlet (20) in the stream member, and the other end is that reaction zone hides cooling medium outlet (21) in the stream member.
4. device according to claim 1, it is characterized in that, be provided with in the described quench zone (14) and hide the stream member and be 6～32 hollow pipelines of 1～30mm distance arrangement directly over 6～32 quenching medium playpipes (13) quench zone (14) in, pipeline enclosure adopts hollow straight tube or bend pipe parts to connect in couples, form 3～16 groups of separate quench zones and hide stream member (22), an end that hides stream member (22) at quench zone is that quench zone hides cooling medium inlet (23) in the stream member, and the other end is that quench zone hides cooling medium outlet (24) in the stream member.
5. device according to claim 1 is characterized in that, described plasma is a kind of in DC arc plasma, high-frequency plasma or the microwave plasma.
6. device according to claim 1 is characterized in that, described plasma torch working gas is one or more in hydrogen, nitrogen, oxygen and the steam.
7. device according to claim 1 is characterized in that, described coal dust is a kind of in the pulverulent mixture of the pulverulent mixture of solid coal dust, coal and living beings or coal and petroleum coke.
8. according to claim 2,3 or 4 described devices, it is characterized in that described hollow pipeline is by a kind of the making in gold, silver or the copper material.
9. according to claim 2,3 or 4 described devices, it is characterized in that described cooling medium is a kind of in water under high pressure, salt solution, buck or the machine oil.
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| CN2009201063892U CN201454524U (en) | 2009-03-20 | 2009-03-20 | Plasma coal cracking reaction device involving flow-shading components |
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| CN2009201063892U CN201454524U (en) | 2009-03-20 | 2009-03-20 | Plasma coal cracking reaction device involving flow-shading components |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508623B (en) * | 2009-03-19 | 2012-07-25 | 清华大学 | Plasma coal cracking reaction apparatus relating to flow screening component |
| CN105338724A (en) * | 2014-08-14 | 2016-02-17 | 新疆兵团现代绿色氯碱化工工程研究中心(有限公司) | V-shaped nozzle of plasma torch |
| CN106057267A (en) * | 2015-05-28 | 2016-10-26 | 官爱平 | Energy superposition matter modification platform and method |
| CN114345263A (en) * | 2022-01-25 | 2022-04-15 | 内蒙古金科发新材料科技有限公司 | Thermal plasma reactor protection device |
-
2009
- 2009-03-20 CN CN2009201063892U patent/CN201454524U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508623B (en) * | 2009-03-19 | 2012-07-25 | 清华大学 | Plasma coal cracking reaction apparatus relating to flow screening component |
| CN105338724A (en) * | 2014-08-14 | 2016-02-17 | 新疆兵团现代绿色氯碱化工工程研究中心(有限公司) | V-shaped nozzle of plasma torch |
| CN106057267A (en) * | 2015-05-28 | 2016-10-26 | 官爱平 | Energy superposition matter modification platform and method |
| CN114345263A (en) * | 2022-01-25 | 2022-04-15 | 内蒙古金科发新材料科技有限公司 | Thermal plasma reactor protection device |
| CN114345263B (en) * | 2022-01-25 | 2024-04-23 | 内蒙古金科发新材料科技有限公司 | Thermal plasma reactor protection device |
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