CN210645802U - High-concentration VOC tail gas treatment system for catalytic cracking of rotating arc thermal plasma - Google Patents
High-concentration VOC tail gas treatment system for catalytic cracking of rotating arc thermal plasma Download PDFInfo
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- CN210645802U CN210645802U CN201921312848.2U CN201921312848U CN210645802U CN 210645802 U CN210645802 U CN 210645802U CN 201921312848 U CN201921312848 U CN 201921312848U CN 210645802 U CN210645802 U CN 210645802U
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Abstract
The utility model relates to a high-concentration VOC tail gas treatment system by catalytic cracking of rotating arc thermal plasma, which comprises an active carbon alternate adsorption device, a hot air alternate desorption device, a rotating arc thermal plasma high-concentration waste gas cracking catalytic device, a DBD plasma deep treatment device and a water spraying device; the utility model discloses an active carbon adsorbs dress in turnThe device for alternately desorbing the low concentration (a) and the hot air is arranged and works in turn by being connected in parallel, and one way realizes that the low concentration (b) is firstly desorbed<10mg/m3) The waste gas after adsorption directly discharges, another way is desorbed another way of adsorption module with one percent of hot gas flow, and the mode is utilized to change the low-concentration waste gas with large air volume into the waste gas with higher concentration with small air volume for treatment, thereby providing possibility for greatly reducing the scale of plasma equipment and reducing the investment cost.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a high-concentration VOC tail gas treatment system by means of catalytic cracking of rotating arc thermal plasma.
Background
With the increasing development of the human industry, the more VOCs are used, the greater the pollution of the exhaust gas to the atmospheric environment, most of which is low in concentration with large wind (<10mg/m3) The discharge of the plasma is characterized in that VOCs waste gas is difficult to degrade, so that low-temperature plasma is increasingly applied to a waste gas treatment system as a high-energy green waste gas treatment technology, and DBD discharge low-temperature plasma is considered to be the most effective waste gas treatment technology due to high electron energy and strong bond breaking capability.
However, because the scaling technology of the DBD discharge low-temperature plasma device is difficult and the equipment cost is high, the DBD discharge low-temperature plasma device only treats common low concentration (C)<1000mg/m3) The waste gas has better effect, and the combustion mode is generally adopted for the waste gas with high concentration at present, and the most widely used mode is the RTO mode at present. However, the method has the disadvantages of overlong starting time, inconvenient and flexible operation, flexible equipment, incomplete treatment, high manufacturing cost and energy consumption, certain combustion supporting for waste gas with fluctuating concentration and unstable waste gas degradation rate.
Thermal plasma discharge is an effective measure for treating high-concentration waste gas at present, but the application of the thermal plasma discharge is limited due to the limited treatment air volume of a single reactor, and the like.
How to utilize low cost and improve the application range of plasma waste gas treatment equipment, and the problem that the waste gas treatment process needs to be solved urgently is the treatment of the waste gas with large air quantity and low concentration by utilizing the plasma technology.
Disclosure of Invention
The invention aims to provide a high-concentration VOC tail gas treatment system for catalytic cracking of rotating arc thermal plasma.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a high-concentration VOC tail gas treatment system for catalytic cracking of rotary arc thermal plasma comprises an activated carbon alternate adsorption device, a hot air alternate desorption device, a rotary arc thermal plasma high-concentration waste gas cracking catalytic device, a DBD plasma deep treatment device and a water spraying device;
the active carbon alternate adsorption device consists of two active carbon adsorption devices which are connected in parallel; the inlet of the adsorption device a enters from a branch air inlet pipe a, and then is connected with an activated carbon box a, a one-way valve a is installed on the branch air inlet pipe a, and the outlet of the activated carbon box a is connected with a branch air outlet pipe a; an inlet of the adsorption device b enters from a branch air inlet pipe b, and then is connected with an activated carbon box b, a one-way valve b is mounted on the branch air inlet pipe b, and an outlet of the activated carbon box b is connected with a branch exhaust pipe b; outlets of the activated carbon box a and the activated carbon box b are both connected with a junction pipe, and then the junction pipe enters a main induced draft fan;
the hot air alternate desorption device consists of two thermal desorption devices which are connected in parallel; the outlet of the heater is divided into two pipelines, one pipeline is connected with a heating pipeline a, a valve of the heating pipeline a is installed on the heating pipeline a, the heating pipeline a is connected with an activated carbon box a after being divided into a desorption pipeline group a, the outlet of the activated carbon box a is connected with the pipeline group a after desorption and then is connected with a desorption converging pipeline a, and the valve of the desorption converging pipeline a is installed on the desorption converging pipeline a; the other path of the outlet of the heater is connected with a heating pipeline b, a valve of the heating pipeline b is installed on the heating pipeline b, the heating pipeline b is connected with an activated carbon box b after being divided into a desorption pipeline group b, the outlet of the activated carbon box b is connected with a pipeline group b after desorption and then connected with a desorption converging pipeline b, a valve of the desorption converging pipeline b is installed on the desorption converging pipeline b, and the desorption converging pipeline a and the desorption converging pipeline b are both connected with a desorption total converging pipeline;
the entry of desorption fan is desorption fan intake pipe, and desorption fan intake pipe valve is installed to the front end of desorption fan intake pipe, and desorption fan intake pipe middle part connects the desorption always joins the pipeline, and the end connects the desorption fan, the desorption fan export connects desorption fan outlet duct, the export of desorption fan outlet duct inserts the reactor intake pipe, and the export of rotatory arc thermal plasma high concentration exhaust gas cracking catalytic unit connects the degree of depth processing trachea, degree of depth processing trachea and DBD plasma device entry linkage, the export of DBD plasma device connects the degree of depth processing blast pipe, divide out a degree of depth processing backward flow pipe connector total intake pipe on the degree of depth processing blast pipe.
The invention uses the active carbon alternate adsorption device and the hot air alternate desorption device, and realizes that the low concentration (A) is firstly carried out through one path by parallel alternate work<10mg/m3) The waste gas is directly discharged after being adsorbed, the other path of the waste gas carries out desorption on the other path of the adsorption module by one percent of hot gas flow, and the mode is utilized to change the low-concentration waste gas with large air volume into the waste gas with small air volume and higher concentration for treatment, thereby providing possibility for greatly reducing the scale of plasma equipment and reducing the investment cost;
the activated carbon is desorbed by hot gas, a small amount of CO is generated, a combustion-supporting effect is objectively provided for the following plasma equipment, the activated carbon can be gradually reduced, only supplement is needed, secondary pollution of the activated carbon is basically avoided, and the cost for treating hazardous waste of the activated carbon is reduced;
because the gas flow is greatly reduced, the rotary arc thermal plasma is convenient to treat the high-concentration waste gas after desorption, the efficiency is high, the number of required reactors is small, and the cost is low. The plasma device is convenient to be used in parallel, and the flexibility and the maneuverability of the startup and shutdown are good;
because the air can also generate discharge, the device has higher high energy density, and does not need auxiliary combustion-supporting gas for waste gas with fluctuating concentration, so that the degradation rate of the waste gas is more stable;
the temperature of the sliding arc thermal plasma is about 400 ℃, which is higher than the ignition temperature of most catalysts, and the plasma acts on the catalysts, so that the catalysts can directly meet the normal working requirements, the plasma catalysis is realized, and the waste gas degradation rate is stably higher than the single catalyst or thermal plasma cracking rate.
The rotating arc thermal plasma improves the time of plasma cracking waste gas through rotation, the length of the high-voltage electrode is adjustable, the rotating arc thermal plasma is suitable for treating waste gas with various concentration gradients, and the application range is wider.
The cracking of the catalyst is directly promoted by the thermal plasma cracking, so that the possibility of catalyst poisoning is greatly reduced, and the thermal plasma also plays a certain cleaning role on the catalyst.
Supplementary catalyst can be added in the pipeline after thermal plasma reactor catalytic treatment, reinforcing treatment effect, and the gas after handling becomes the waste gas of low concentration low discharge, and the deep processing is carried out to the most suitable adoption DBD, provides reliable supplementary for the processing of the residual waste gas that more difficult degradation, compares and singly adopts DBD equipment efficient, with low costs.
The waste gas treated by the DBD plasma has a large amount of residual active ions and ozone, a certain pre-oxidation cracking effect is achieved by refluxing part of gas to pre-treat the original waste gas, the switching frequency of a pipeline is reduced, and the waste gas also has a degradation effect in the adsorption process. The active ions are finally sprayed into the water and dissolved in the water, so that the spraying effect is enhanced.
The desorption pipeline inlet is provided with a gas supplementing valve, and the desorption fan outlet is provided with a concentration monitoring and fire retardant valve for adjusting the concentration of the thermal plasma inlet gas, so that explosion is avoided, and the safety is improved.
When the waste gas is not treated, the reactor can be cleaned by starting the plasma, and equipment can be adjusted by starting the plasma to clean the catalyst.
Drawings
FIG. 1 is a schematic view of a high-concentration VOC tail gas treatment system for catalytic cracking by rotating arc thermal plasma provided by the patent of the invention.
Fig. 2 is a schematic structural diagram of a rotating arc thermal plasma high-concentration exhaust gas cracking catalytic device.
In the figure, 1 total air inlet pipe, 2 air inlet pipes a, 3 one-way valves a, 4 activated carbon boxes a, 5 exhaust pipe valves a, 6 concentration detection a, 7 exhaust pipes a, 8 air inlet pipes b, 9 one-way valves b, 10 activated carbon boxes b, 11 exhaust pipe valves b, 12 concentration detection b, 13 exhaust pipes b, 14 converging pipe, 15 total induced draft fan, 16 exhaust pipes, 17 spray tower, 18 exhaust cylinder, 19 heater, 20 heating pipeline b, 21 heating pipeline b valve, 22 desorption pipeline group b, 23 desorption pipeline group b, 24 desorption converging pipeline b, 25 desorption converging pipeline b valve, 26 heating pipeline a, 27 heating pipeline a valve, 28 desorption pipeline group a, 29 desorption converging pipeline a, 30 desorption converging pipeline a valve, 31 desorption converging pipeline a valve, 32 desorption total converging pipeline, 33 desorption fan air inlet pipe, 34 desorption fan air inlet pipe valve, 35 desorption fans, 36 desorption fan outlet pipelines, 37 pressure gauge control, 38 fire relief valves, 39 catalyst supplement, 40 advanced treatment gas pipes, 41 DBD plasma devices, 42 advanced treatment gas exhaust pipes, 43 advanced treatment return pipes, 44 reactor gas inlet pipes, 45 reactor shells, 46 cylinder high-pressure insulating sleeves, 47 catalyst filling cylinders, 48 reactor outlet mesh covers, 49 high-pressure wires, 50 grounding wires, 51 high-pressure insulating columns, 52 high-pressure threaded electrodes, 53 cyclone modules, 54 rotating arc plasma, 55 catalysts and 56 rotating arc plasma power supplies.
Detailed Description
The present invention will be further described with reference to the following specific examples.
A high-concentration VOC tail gas treatment system for catalytic cracking of rotary arc thermal plasma comprises an activated carbon alternate adsorption device, a hot air alternate desorption device, a rotary arc thermal plasma high-concentration waste gas cracking catalytic device, a DBD plasma deep treatment device and a water spraying device;
the active carbon alternate adsorption device consists of two active carbon adsorption devices which are connected in parallel; an inlet of the adsorption device a enters from a branch air inlet pipe a2, and then is connected into an activated carbon box a4, a check valve a3 is installed on the branch air inlet pipe a, an outlet of the activated carbon box a4 is connected with a branch exhaust pipe a7, and a branch exhaust pipe valve a5 and a concentration detection a6 are sequentially installed on the branch exhaust pipe a 7; an inlet of the adsorption device b enters from a branch air inlet pipe b8 and then is connected into an activated carbon box b10, a check valve b9 is installed on the branch air inlet pipe b8, an outlet of the activated carbon box b10 is connected with a branch exhaust pipe b13, and a branch exhaust pipe b13 is sequentially provided with a branch exhaust pipe valve b11 and a concentration detection b 12; outlets of the activated carbon box a4 and the activated carbon box b10 are both connected with a converging pipe 14, and then the converging pipe enters a main induced draft fan 15;
the hot air alternate desorption device consists of two thermal desorption devices which are connected in parallel; an outlet of the heater 19 is divided into two pipelines, one pipeline is connected with a heating pipeline a26, a heating pipeline a26 is provided with a heating pipeline a valve 27, the heating pipeline a26 is divided into a desorption pipeline group a28 and then is connected with an activated carbon box a4, an outlet of the activated carbon box a4 is connected with a desorption pipeline group a29 and then is connected with a desorption converging pipeline a30, and a desorption converging pipeline a30 is provided with a desorption converging pipeline a valve 31; the other path of the outlet of the heater is connected with a heating pipeline b20, a heating pipeline b valve 21 is installed on the heating pipeline b20, the heating pipeline b20 is divided into a desorption pipeline group b22 and then is connected with an activated carbon box b10, the outlet of the activated carbon box b10 is connected with a desorption pipeline group b23 and then is connected with a desorption converging pipeline b24, the desorption converging pipeline b24 is provided with a desorption converging pipeline b valve 25, and the desorption converging pipeline a30 and the desorption converging pipeline b24 are both connected with a desorption total converging pipeline 32;
the entry of desorption fan 35 is desorption fan intake pipe 33, and desorption fan intake pipe valve 34 is installed to the front end of desorption fan intake pipe 33, and desorption fan intake pipe 33 middle part connects desorption total converging pipeline 32, and the end connects desorption fan 35, desorption fan 35 export connects desorption fan outlet pipe 36, install manometer control 37 and back-fire relief valve 38 on the desorption fan outlet pipe 36 in proper order, rotatory arc thermal plasma high concentration exhaust gas cracking catalytic unit air inlet 44 is inserted in the export of desorption fan outlet pipe 36, and the export of rotatory arc thermal plasma high concentration exhaust gas cracking catalytic unit connects deep processing trachea 40, the inside supplementary catalyst 39 that fills of deep processing trachea 40, deep processing trachea 40 and the entry linkage of DBD plasma device 41, the export of DBD plasma device 41 connects deep processing blast pipe 42, a deep treatment return pipe 43 is divided from the deep treatment exhaust pipe 42 and is connected with the main air inlet pipe 1;
the rear end of the main induced draft fan 15 is connected with an exhaust pipe 16, the exhaust pipe 16 and the advanced treatment exhaust pipe 42 are both connected with the spray tower 17, and gas entering the spray tower 17 is discharged by an exhaust funnel 18 at the top after advanced treatment.
A branch exhaust pipe valve a5 and a concentration detection a6 are sequentially mounted on the branch exhaust pipe a7, and a branch exhaust pipe valve b11 and a concentration detection b12 are sequentially mounted on the branch exhaust pipe b 13; a pressure gauge control 37 and a fire relief valve 38 are sequentially arranged on the outlet pipeline 36 of the desorption fan; the inside of the advanced treatment gas pipe 40 is filled with a supplementary catalyst 39.
The high-concentration waste gas cracking catalytic device of the rotary arc thermal plasma is driven by a rotary arc plasma power supply 56, the rotary arc plasma power supply 56 is connected with a high-voltage threaded electrode 52 through a high-voltage wire 49, the high-voltage threaded electrode 52 passes through a high-voltage insulating column 51 in the center through threads to serve as a high-voltage discharge electrode, the high-voltage insulating column 51 is fixed at the top of a reactor shell 45 in the center through threads, an inner-cylinder high-voltage insulating sleeve 46 is fixed on the inner wall of the cylinder of the reactor shell 45 through threads, an inner wall of the inner-cylinder high-voltage insulating sleeve 46 passes through a thread fixing cyclone module 53, an inclined hole is formed in the cyclone module 53 from top to bottom to form a cyclone, the center passes through the high-voltage threaded electrode 52, a reactor air inlet pipe 44 is inserted in one side of the top of the reactor shell 45, and, catalyst 55 particles are placed in the catalyst filling cylinder 47, the outlet at the lower part of the catalyst filling cylinder 47 is connected with the reactor outlet mesh enclosure 48 through external threads, and the outlet of the rotary arc thermal plasma high-concentration waste gas cracking catalytic device is connected with the advanced treatment air pipe 40.
The reaction cavity of the rotary arc thermal plasma high-concentration waste gas cracking catalytic device is made of stainless steel materials, and the reactor shell 45 is connected with the ground; the high-voltage insulating column 51 is made of polytetrafluoroethylene materials and has a thickness not less than 5mm, the high-voltage insulating column 51 is fixed in a middle hole in the top of the reactor shell 45 and is fixed through threads, the upper end face and the lower end face of the high-voltage insulating column 51 protrude out of a top plate of a cylinder body of the reactor shell by at least 5mm, the high-voltage insulating sleeve 46 in the cylinder is made of polytetrafluoroethylene materials and has a thickness not less than 5mm, threads are arranged inside and outside the high-voltage insulating sleeve 46 in the cylinder, external threads are concentrically fixed with the inner wall of the cylinder body of the reactor shell, internal threads are fixed with external threads of the cyclone module 53, the threads of the center holes of the high-voltage insulating column 51 and the cyclone module 53 are concentric with and have the same diameter as the high-voltage threaded electrode 52, the high-voltage threaded electrode 52 sequentially penetrates through the high-voltage insulating column 51 and, the material is stainless steel; the high voltage threaded electrode 52 has sharp threads on its outer surface to facilitate arc generation and stable sliding.
The cyclone module 53 has a height of 5mm from top to bottomA plurality of circular inclined holes of about 30 degrees are drilled on the circumference of the cyclone body, so that cyclone is formed; the pressure of the reactor air inlet pipe 44 is 4-6 atmospheres, and the gas flow is about 10m3H; the lower part of the cylinder body of the reactor shell 45 is connected with a catalyst filling cylinder 47 through external threads, the material of the catalyst filling cylinder 47 is stainless steel, and catalyst 55 filler is placed in the catalyst filling cylinder 47; the bottom of the catalyst 55 packing is provided with a reactor outlet mesh enclosure 48 which is made of stainless steel and fixed by the external thread of the catalyst packing cylinder 47, and the reactor outlet mesh enclosure 48 finally extends into the advanced treatment air pipe 40.
A method for treating tail gas of high-concentration VOC (volatile organic compound) by catalytic cracking of rotating arc thermal plasma comprises the steps that low-concentration large-air-volume waste gas firstly enters an activated carbon adsorption device a for treatment, the treated tail gas reaching the standard is directly discharged into a spray tower through a fan, the tail gas is directly discharged after spraying treatment, and a switching pipeline is subjected to adsorption treatment by an adsorption device b after the adsorption of the adsorption device a is saturated; simultaneously, a hot air desorption device starts to desorb the adsorption device a, the desorbed small-air-volume high-concentration tail gas enters a rotary arc thermal plasma high-concentration waste gas cracking catalytic device for treatment, the treated small-air-volume low-concentration tail gas enters a DBD plasma deep treatment device for deep treatment, and finally the tail gas is treated by a spray tower and is discharged after reaching the standard; after adsorption equipment a desorption was accomplished, through the pipeline switching, began to carry out little amount of wind thermal desorption again to first adsorption equipment b, discharge after handling by plasma and spray column again, adsorption equipment a begins to adsorb the low concentration waste gas of the big amount of wind, so alternate adsorption desorption cycle work.
Example one
Only the gas supplementing valve is opened first, then all the plasma equipment is opened, and the generated active particle gas flow flows back to the waste gas pipeline for pre-cracking oxidation and is dissolved in water to realize high-efficiency spraying.
Opening one path of adsorption to start adsorption treatment of waste gas to be sprayed and discharged, waiting for the outlet concentration of the first path of pipeline to reach the initial concentration, namely, performing adsorption saturation, closing a pipeline valve after the waste gas treatment of the first path, opening a heater, closing an air compensating valve, opening a desorption channel valve of the first path to perform thermal desorption and plasma catalytic cracking treatment, and simultaneously opening a waste gas channel valve of the second path to start continuous adsorption of the waste gas to be treated; before the second path of adsorption is saturated, the first path of adsorption is desorbed to a time period which is less than the blank time after the initial concentration, and the gas supply valve is adjusted to continuously perform the self-cleaning function of the plasma catalyst; after the second path of adsorption is saturated, closing the air compensating valve, closing a valve after the second path of waste gas treatment, opening a desorption channel valve of the second path, carrying out thermal desorption and plasma catalytic cracking treatment processes, and simultaneously restarting to open a waste gas channel valve of the first path and restart to adsorb the waste gas to be treated; and the process is circulated.
Example two
For low-concentration gas which is particularly easy to oxidize and degrade, all plasma equipment is started, active particle airflow is generated to flow back to a waste gas pipeline for pre-cracking and oxidation, the active particle airflow is dissolved in water to realize efficient spraying, one path of adsorption is opened, waste gas is adsorbed and treated, the waste gas is discharged to spraying and discharging, the reaction is continued in the adsorption, and the degradation of the waste gas can be realized in the process without switching.
EXAMPLE III
The non-waste gas production stopping stage can be carried out, desorption maintenance is carried out, all pipeline valves are closed after adsorption, all desorption pipeline valves are opened, all plasma equipment is opened again, residual waste gas is treated, active particle airflow is generated and then dissolved in water, and efficient spraying depth treatment is achieved.
Example four
Similar to the third embodiment, for low concentration gas which is particularly easy to oxidize and degrade, two paths of waste gas adsorption and plasma particle preoxidation cracking processes are opened simultaneously, and twice of waste gas air volume can be processed.
EXAMPLE five
The adsorption and desorption can be connected in parallel with more than two paths and work in sequence, all the plasma processing devices can be freely connected in parallel and in series, and the like.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any person skilled in the art can make any simple modification, equivalent replacement, and improvement on the above embodiment without departing from the technical spirit of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a rotatory arc thermal plasma catalytic cracking high concentration VOC tail gas processing system which characterized in that: the device comprises an active carbon alternate adsorption device, a hot air alternate desorption device, a rotary arc thermal plasma high-concentration waste gas cracking catalytic device, a DBD plasma deep treatment device and a water spraying device;
the active carbon alternate adsorption device consists of two active carbon adsorption devices which are connected in parallel; an inlet of the adsorption device a enters from a branch air inlet pipe a (2), and then is connected into an activated carbon box a (4), a one-way valve a (3) is installed on the branch air inlet pipe a (2), and an outlet of the activated carbon box a (4) is connected with a branch exhaust pipe a (7); an inlet of the adsorption device b enters from a branch air inlet pipe b (8), and then is connected into an activated carbon box b (10), a one-way valve b (9) is installed on the branch air inlet pipe b (8), and an outlet of the activated carbon box b (10) is connected with a branch exhaust pipe b (13); outlets of the activated carbon box a (4) and the activated carbon box b (10) are both connected with a converging pipe (14), and then the converging pipe enters a total induced draft fan (15);
the hot air alternate desorption device consists of two thermal desorption devices which are connected in parallel; an outlet of the heater (19) is divided into two pipelines, one pipeline is connected with a heating pipeline a (26), a heating pipeline a valve (27) is installed on the heating pipeline a (26), the heating pipeline a (26) is connected into an activated carbon box a (4) after being divided into a desorption pipeline group a (28), an outlet of the activated carbon box a (4) is connected with a desorption pipeline group a (29), then is connected with a desorption converging pipeline a (30), and a desorption converging pipeline a valve (31) is installed on the desorption converging pipeline a (30); the other path of the heater outlet is connected with a heating pipeline b (20), a heating pipeline b valve (21) is installed on the heating pipeline b (20), the heating pipeline b (20) is connected with an activated carbon box b (10) after being divided into a desorption pipeline group b (22), the outlet of the activated carbon box b (10) is connected with a desorption pipeline group b (23) and then connected with a desorption converging pipeline b (24), a desorption converging pipeline b valve (25) is installed on the desorption converging pipeline b (24), and the desorption converging pipeline a (30) and the desorption converging pipeline b (24) are both connected with a desorption total converging pipeline (32);
the inlet of the desorption fan (35) is a desorption fan air inlet pipe (33), the front end of the desorption fan air inlet pipe (33) is provided with a desorption fan air inlet pipe valve (34), the middle part of the desorption fan air inlet pipe (33) is connected with the desorption main converging pipeline (32), the tail end of the desorption fan air inlet pipe (33) is connected with the desorption fan (35), the outlet of the desorption fan (35) is connected with a desorption fan outlet pipeline (36), the outlet of the desorption fan outlet pipeline (36) is connected with a reactor air inlet pipe (44), the outlet of the rotary arc thermal plasma high-concentration waste gas cracking catalytic device is connected with an advanced treatment air pipe (40), the advanced treatment gas pipe (40) is connected with an inlet of a DBD plasma device (41), the outlet of the DBD plasma device (41) is connected with a depth treatment exhaust pipe (42), a deep treatment return pipe (43) is divided from the deep treatment exhaust pipe (42) and is connected with the main air inlet pipe (1).
2. The rotating arc thermal plasma catalytic cracking high concentration VOC exhaust treatment system of claim 1, wherein: the rear end of the main induced draft fan (15) is connected with an exhaust pipe (16), the exhaust pipe (16) and the deep treatment exhaust pipe (42) are connected into the spray tower (17), and the top of the spray tower (17) is provided with an exhaust funnel (18) for discharging treated gas.
3. The rotating arc thermal plasma catalytic cracking high concentration VOC exhaust treatment system of claim 1, wherein: a branch exhaust pipe valve a (5) and a concentration detection a (6) are sequentially installed on the branch exhaust pipe a (7), and a branch exhaust pipe valve b (11) and a concentration detection b (12) are sequentially installed on the branch exhaust pipe b (13); a pressure gauge control (37) and a fire retardant valve (38) are sequentially arranged on the outlet pipeline (36) of the desorption fan; the interior of the advanced treatment air pipe (40) is filled with a supplementary catalyst (39).
4. The rotating arc thermal plasma catalytic cracking high concentration VOC exhaust treatment system of claim 1, wherein: the high-concentration waste gas cracking catalytic device of the rotary arc thermal plasma is driven by a rotary arc plasma power supply (56), the rotary arc plasma power supply (56) is connected with a high-voltage threaded electrode (52) through a high-voltage wire (49), the high-voltage threaded electrode (52) passes through a high-voltage insulating column (51) in the middle through threads to serve as a high-voltage discharge electrode, the high-voltage insulating column (51) is fixed at the top of a reactor shell (45) in the middle through threads, an inner high-voltage insulating sleeve (46) in a cylinder is fixed on the inner wall of the cylinder of the reactor shell (45) through threads, a cyclone module (53) is fixed on the inner wall of the inner high-voltage insulating sleeve (46) through threads, an inclined hole is formed in the cyclone module (53) from top to bottom, the center of the cyclone column passes through the high-voltage threaded electrode (52), and a reactor air inlet pipe (, reactor shell (45) lower part is connected through screw thread and catalyst packing section of thick bamboo (47), and catalyst (55) granule is placed to catalyst packing section of thick bamboo (47) inside, reactor export screen panel (48) are passed through external screw thread connection to catalyst packing section of thick bamboo (47) lower part export, and the high concentration exhaust gas cracking catalytic unit export of rotatory arc thermal plasma connects advanced treatment trachea (40) again.
5. The rotating arc thermal plasma catalytic cracking high concentration VOC exhaust treatment system of claim 4, wherein: the reaction cavity of the rotary arc thermal plasma high-concentration waste gas cracking catalytic device is made of stainless steel materials, and a reactor shell (45) is connected with the ground; the high-voltage insulating column (51) is made of polytetrafluoroethylene materials, the thickness of the high-voltage insulating column is not less than 5mm, the high-voltage insulating column (51) is fixed in a middle hole in the top of a reactor shell (45) and is fixed through threads, the upper end face and the lower end face of the high-voltage insulating column (51) protrude out of a top plate of a cylinder body of the reactor shell by at least 5mm, a high-voltage insulating sleeve (46) in the cylinder is made of polytetrafluoroethylene materials, the thickness of the high-voltage insulating sleeve is not less than 5mm, threads are arranged inside and outside the high-voltage insulating sleeve (46) in the cylinder, the outer threads are concentrically fixed with the inner wall of the cylinder body of the reactor shell, the inner threads are fixed with the outer threads of a cyclone module (53), the threads of center holes of the high-voltage insulating column (51) and the cyclone module (53) are concentric and equal in diameter with the high-, the high-voltage threaded electrode (52) is 10-12 mm away from the inner wall of the shell cylinder of the reactor, and the material is stainless steel; the high-voltage thread electrode (52) is provided with tip threads on the outer surface, so that arc generation and stable sliding are facilitated.
6. The rotating arc thermal plasma catalytic cracking high concentration VOC exhaust treatment system of claim 4, wherein: the height of the cyclone module (53) is 5mm, and a plurality of circular inclined holes of about 30 degrees are formed in the circumference from top to bottom, so that cyclone is formed; the pressure of the gas inlet pipe (44) of the reactor is 4-6 atmospheres, and the gas flow is about 10m3H; the lower part of the cylinder body of the reactor shell (45) is connected with a catalyst filling cylinder (47) through external threads, the material of the catalyst filling cylinder (47) is stainless steel, and catalyst (55) filler is placed in the catalyst filling cylinder (47); the bottom of the catalyst (55) filling material is provided with a reactor outlet mesh enclosure (48) which is made of stainless steel and fixed through the external thread of the catalyst filling cylinder (47), and the reactor outlet mesh enclosure (48) finally extends into the advanced treatment air pipe (40).
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| CN110508109A (en) * | 2019-08-14 | 2019-11-29 | 南京苏曼等离子科技有限公司 | Rotary arc hot plasma catalytic pyrolysis high concentration VOC exhaust treatment system and method |
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| CN110508109A (en) * | 2019-08-14 | 2019-11-29 | 南京苏曼等离子科技有限公司 | Rotary arc hot plasma catalytic pyrolysis high concentration VOC exhaust treatment system and method |
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