CN210845876U - Device for synergistically eliminating NOx and VOCs in exhaust gas - Google Patents
Device for synergistically eliminating NOx and VOCs in exhaust gas Download PDFInfo
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- CN210845876U CN210845876U CN201920837227.XU CN201920837227U CN210845876U CN 210845876 U CN210845876 U CN 210845876U CN 201920837227 U CN201920837227 U CN 201920837227U CN 210845876 U CN210845876 U CN 210845876U
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Abstract
The utility model relates to a device for in waste gas NOx and VOCs are eliminated in coordination, the device includes dry filter subassembly, the cold subassembly of table, zeolite runner subassembly, spark arrester subassembly, catalysis-oxidation subassembly, spout ammonia subassembly and SCR catalysis subassembly organic combination, particulate matter, dust are got rid of to waste gas through dry filter module, the cold module of table to and get into adsorption zone and cooling space in the zeolite module respectively after the cooling, adsorption zone waste gas links to each other with the chimney after purifying, cooling space export waste gas gets into behind the heat exchanger heat transfer behind the zeolite runner module desorption district and gets into catalysis-oxidation module and SCR catalysis subassembly, link to each other with the chimney at last. The utility model discloses eliminate NOx and VOCs in coordination, the system is high-efficient stable, solves the problem that contains NOx and contains N organic waste gas oxidation process production NOx, improves catalysis-oxidation, SCR catalytic unit utilization ratio simultaneously. The utility model discloses the device need not civil engineering, installation, and the mobility is strong.
Description
Technical Field
The utility model relates to a gaseous purification field, specific theory relates to a portable high efficiency is in coordination with integrated device of eliminating NOx and VOCs.
Background
Volatile Organic Compounds (VOCs) become one of the major controlled atmospheric pollutants, placing heavy pressure on ecology and environment, and can generate secondary pollutants with stronger toxicity and longer durability under chemical action, further expanding the harmfulness thereof. For this reason, the nation has successively raised stringent emission standards to control VOCs emissions. The conventional effective methods for treating the VOCs include an adsorption method, a catalytic oxidation method and an adsorption concentration-catalytic oxidation method, and have great defects in the aspect of VOCs treatment. The adsorption method is a treatment method for transferring pollutants, and does not completely carry out harmless treatment on organic matters. The catalytic oxidation method is to convert organic pollutants into H under the action of a catalyst2O and CO2However, in the catalytic oxidation method, the waste gas is heated when the low-concentration and large-air-volume organic waste gas is treatedSo as to reach the catalyst operating temperature, and has the defects of large investment, high energy consumption and the like. The adsorption concentration-catalytic oxidation method is used for carrying out adsorption concentration on low-concentration waste gas, the concentration of VOCs in the waste gas is improved, the air quantity is reduced, the system scale is reduced, and reaction heat generated by oxidizing the VOCs is utilized. In addition, the catalytic oxidation method and the adsorption concentration-catalytic oxidation method are difficult to treat the N-containing organic waste gas, and NOx cannot reach the emission standard.
The adsorption concentration and the catalytic oxidation are integrated, the system performance can be improved, usually, an activated carbon adsorption bed is used as a concentration system, a catalytic oxidation unit is combined to realize adsorption concentration, the adsorption bed is desorbed by effectively utilizing oxidation heat, and the adsorption bed realizes alternate active regeneration. However, the device is intermittent adsorption-regeneration, the equipment volume is huge, and the active carbon adsorbent has potential safety hazard.
Patent CN 109126383 discloses a VOC exhaust purification all-in-one, at first utilize photocatalysis + spray the washing to carry out the preliminary treatment to VOC waste gas, then concentrate through concentrated runner and catalytic oxidation and handle, however, the equipment flow is complicated, contains a large amount of vapor in the waste gas after spraying the processing, humidity is in the saturated condition, and the vapor in the waste gas and VOC material produce the competition absorption at concentrated runner, and concentrated runner adsorbs vapor and reduces the absorption to VOC, increases the desorption energy consumption simultaneously. Patent CN103394270 discloses a movable integrated organic waste gas treatment device, which uses a continuous rotary wheel type adsorption bed and a catalytic bed as core treatment units, organic waste gas enters the catalytic bed after being concentrated by the adsorption bed, and the rotary wheel type adsorption bed realizes continuous adsorption-regeneration, but the device can not eliminate NOx in waste gas.
The existing integrated device for treating VOCs mainly takes active carbon or zeolite molecular sieve as an adsorption concentration unit and is matched with a catalytic oxidation device. The existing equipment has complex structure and large volume, and can not eliminate NOx and process N-containing organic waste gas.
SUMMERY OF THE UTILITY MODEL
To the problem and not enough that prior art exists, the utility model provides a device and method for eliminating NOx and VOCs in coordination in the waste gas to effectively overcome the shortcoming that above-mentioned device exists.
The utility model provides a device for in waste gas NOx and VOCs are eliminated in coordination, including dry filter, the cold subassembly of table, zeolite swivel subassembly, spark arrester subassembly, catalysis-oxidation subassembly, heat exchanger, spout ammonia subassembly and SCR catalysis subassembly, wherein, dry filter passes through the cold subassembly of table with zeolite swivel subassembly links to each other, zeolite swivel subassembly have two gas outlet and respectively with spark arrester subassembly and heat exchanger are linked together, the spark arrester subassembly with catalysis-oxidation subassembly is linked together, catalysis-oxidation subassembly link to each other with the heat exchanger is linked together, catalysis-oxidation subassembly with be equipped with on the pipeline between the heat exchanger and spout the ammonia subassembly, the heat exchanger with SCR catalysis subassembly is linked together.
Further, the zeolite rotating wheel assembly comprises a zeolite rotating wheel and a driving device, an adsorption area, a desorption area and a cooling area are arranged on the zeolite rotating wheel, the adsorption area, the desorption area and the cooling area are alternately changed along with the circumferential rotation of the zeolite rotating wheel, and an air outlet of the surface cooling assembly is respectively communicated with an inlet of the adsorption area and an inlet of the cooling area; the cooling area is communicated with the desorption area through a heat exchange assembly, and an outlet of the desorption area is communicated with an inlet of the flame arrester assembly.
Further, the catalysis-oxidation assembly comprises a heating device and a catalysis device, an inlet of the heating device is communicated with an outlet of the flame arrester assembly, an outlet of the heating device is connected with an inlet of the catalysis device, and an outlet of the catalysis device is communicated with the heat exchanger.
Further, a catalyst over-temperature cold air assembly is arranged between the heating device and the catalytic device, the catalyst over-temperature cold air assembly comprises an air supplementing electric valve and a cooling fan, one end of the air supplementing electric valve is communicated with a pipeline between the heating device and the catalytic device through the cooling fan, and the other end of the air supplementing electric valve is communicated with the atmosphere and used for introducing the cold air of the atmosphere to cool the air when the temperature of the gas transferred to the catalyst is too high.
Furthermore, the catalytic device comprises at least two independent single-tube reactors arranged in parallel and a heat-preservation outer cover sleeved outside the single-tube reactors, and each single-tube reactor comprises a VOC (volatile organic compound) oxidation catalyst, a sealing gasket and a metal shell which are sequentially sleeved from inside to outside.
Further, it includes ammonia storage tank, ammonia delivery pump and ammonia atomization injection unit to spout the ammonia subassembly, ammonia atomization injection unit sets up the catalysis-oxidation subassembly with on the pipeline between the heat exchanger, ammonia atomization injection unit is linked together through ammonia delivery pump and ammonia storage tank.
Further, spout ammonia subassembly still includes ammonia metering unit and exhaust gas temperature controller, ammonia metering unit sets up on the pipeline between ammonia atomizing injection unit and the ammonia delivery pump for measure the quantity of ammonia.
Further, the SCR catalytic assembly comprises an SCR catalyst, a catalytic assembly sealing gasket and an SCR catalytic assembly metal shell which are sequentially sleeved from inside to outside; and the upper end and the lower end of the SCR catalyst are respectively provided with an air inlet and an air outlet, the air inlet is communicated with a hot end outlet of the heat exchanger, and the air outlet is communicated with a chimney.
Further, still include the sensor subassembly, the sensor subassembly includes: an air intake valve provided at one end of the dry filter; an emergency vent valve and pressure controller disposed on the catalytic-oxidation assembly; a heating device inlet temperature controller and a heating device outlet temperature controller respectively arranged at the inlet and the outlet of the heating device; the catalytic device inlet temperature controller and the catalytic device outlet temperature controller are respectively arranged at the catalytic device inlet and the catalytic device outlet; the cold end inlet temperature controller and the cold end outlet temperature controller are respectively arranged at the cold end inlet and the cold end outlet of the heat exchanger; the SCR catalytic assembly inlet temperature controller and the SCR catalytic assembly outlet temperature controller are respectively arranged at the inlet and the outlet of the SCR catalytic assembly; and the SCR catalytic assembly inlet NOx sensor and the SCR catalytic assembly outlet NOx sensor are respectively arranged at the inlet and the outlet of the SCR catalytic assembly.
The utility model discloses an go up arbitrary a use method that is arranged in device of collaborative elimination NOx and VOCs in waste gas, including following step:
1) the organic waste gas after the waste gas containing NOx and volatile organic compounds is used for removing dust and particulate matters in the waste gas through a dry filter is subjected to waste gas temperature reduction through a surface cooling component to obtain primary treatment organic waste gas which is used for removing the dust and the particulate matters and is subjected to temperature reduction treatment,
2) the organic waste gas of the first-stage treatment in the step 1) is divided into two parts, one part enters an adsorption area of the zeolite rotating wheel assembly, and the gas purified by the adsorption area is discharged into the atmosphere through a chimney; the other part of the waste gas enters a cooling area of the zeolite rotating wheel assembly, sequentially passes through the cooling area, a heat exchanger, a desorption area of the zeolite rotating wheel assembly and a flame arrester assembly, and then enters a heating assembly to obtain secondary-treated organic waste gas;
3) and (3) sequentially passing the secondary treatment organic waste gas obtained in the step 2) through a catalytic-oxidation assembly, an ammonia spraying assembly and an SCR catalytic assembly to obtain organic waste gas without NOx and VOCs, and discharging the organic waste gas into the atmosphere through a chimney.
Wherein, in the step 3):
when the temperature difference delta T detected by the heating component inlet temperature controller and the heating component outlet temperature controller is T511-T510 which is greater than the preset temperature, the heating component is started to heat the gas, and the heated waste gas enters the catalytic-oxidation component for catalytic oxidation; the waste gas after catalytic oxidation enters an SCR catalytic assembly after passing through a heat exchanger;
when the temperature T detected by an exhaust gas temperature controller in the ammonia spraying assembly is higher than a preset temperature, starting the ammonia spraying assembly to spray ammonia;
and controlling an ammonia metering unit of the ammonia injection assembly according to the NOx concentrations detected by the NOx sensor at the inlet of the SCR catalytic assembly and the NOx sensor at the outlet of the SCR catalytic assembly.
The beneficial effects of the utility model reside in that: the utility model discloses a high-efficient integrated device who eliminates NOx and VOCs in coordination of dynamic formula can be disposable eliminate NOx and VOCs in coordination, and the system is high-efficient stable, solves the problem that contains NOx and contains N organic waste gas oxidation process production NOx, improves catalysis-oxidation, SCR catalysis subassembly simultaneously and makes good use ofAnd (7) the rate. And simultaneously the utility model discloses a high-efficient integrated device who eliminates NOx and VOCs in coordination of dynamic formula need not the civil engineering installation, and is portable strong. When the concentration of the N waste gas VOCs in the buccal cavity is 100-800mg/m3During the process, the purification efficiency of the adsorption area of the zeolite runner module is more than 90 percent, the removal efficiency of the catalytic-oxidation module on VOCs can reach more than 99 percent, the removal efficiency of the SCR catalytic assembly on NOx is more than 95 percent, and the NOx in the outlet waste gas is<50mg/m3，NH3The escape is less than 3 ppm.
Drawings
FIG. 1, a schematic diagram of a device for the synergistic elimination of NOx and VOCs in exhaust gases of the present invention
FIG. 2 is a schematic view of the structure of the catalytic oxidation module of the present invention
FIG. 3 is a schematic cross-sectional view of a single-tube reactor of the present invention
FIG. 4 is a schematic view of the end face of a single-tube reactor according to the present invention
FIG. 5 is a schematic cross-sectional view of the SCR catalytic assembly of the present invention
In fig. 1 to 4, the list of components represented by each reference numeral is as follows:
1. dry type filtering component, 2, surface cooling component, 3, zeolite rotating wheel component, 4, flame arrester component, 5, catalysis-oxidation component, 6, heat exchange component, 7, ammonia spraying component, 8 and SCR catalysis component
S1, adsorption zone, S2, cooling zone, S3 and desorption zone
71. Ammonia storage tank, 72, ammonia delivery pump, 73, ammonia metering unit, 74, ammonia atomization spraying unit
F1, induced draft fan, F2, desorption fan, F3 and cooling fan
V1, air inlet electric valve, V2, air supply electric valve, EV1, emergency exhaust valve, P1 and pressure controller
521. 5210 single-tube reactor of catalytic-oxidation assembly, VOC oxidation catalyst 5211, sealing gasket 5212, metal shell 81, SCR catalyst 82, sealing gasket of catalytic assembly 83 and metal shell of SCR catalytic assembly
T510, a heating assembly inlet temperature controller, T511, a heating assembly outlet temperature controller, T520, a catalytic assembly inlet temperature controller, T521, a catalytic assembly outlet temperature controller, T60, a heat exchanger cold end inlet temperature controller, T61, a heat exchanger cold end outlet temperature controller, T70, an ammonia injection assembly exhaust gas temperature controller T80, an SCR catalytic assembly inlet temperature controller, T81, an SCR catalytic assembly outlet temperature controller, C80, an SCR catalytic assembly inlet NOx sensor, C81, an SCR catalytic assembly outlet NOx sensor
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings and examples, which are set forth only to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1-5, fig. 1 is a schematic structural diagram of the integrated device for efficiently and synergistically eliminating NOx and VOCs of the present invention, which comprises a dry filtering component 1, a surface cooling component 2, a zeolite wheel component 3, a flame arrester component 4, a catalytic-oxidation component 5, a heat exchange component 6, an ammonia injection component 7, and an SCR catalytic component 8, wherein the dry type filtering component 1 is connected with the surface cooling component 2, the surface cooling component 2 is connected with the zeolite rotating wheel component 3, the zeolite rotating wheel component 3 is simultaneously connected with the flame arrester component 4 and the heat exchange component 6, the flame arrester component 4 is connected with the catalytic-oxidation component 5, the catalytic-oxidation component 5 is connected with the heat exchange component 6, the heat exchange component 6 is connected with the SCR catalytic component 8, and the ammonia injection component 7 is connected on a pipeline between the catalytic oxidation component 5 and the heat exchange component 6.
The zeolite rotating wheel assembly 3 comprises a zeolite rotating wheel and a driving device, an adsorption area S1, a desorption area S3 and a cooling area S2 are arranged on the zeolite rotating wheel, the adsorption area S1, the desorption area S3 and the cooling area S2 are alternately changed along with the circumferential rotation of the zeolite rotating wheel, and the air outlets of the surface cooling assemblies are respectively communicated with the inlet of the adsorption area S1 and the inlet of the cooling area S2; the cooling zone S2 is communicated with a desorption zone S3 through a heat exchange assembly, and the outlet of the desorption zone S3 is communicated with the inlet of the flame arrester assembly 4. The inside and the surface of the pore canal of the zeolite runner are coated with adsorbents.
Wherein the catalytic-oxidation assembly 5 comprises a heating device 51 and a catalytic device 52, an inlet of the heating device is communicated with an outlet of the flame arrester assembly 4, an outlet of the heating device 51 is connected with an inlet of the catalytic device 52, and an outlet of the catalytic device 52 is communicated with the heat exchanger 6. The catalytic assembly 52 is formed by assembling independent single-tube reactors 521 in parallel, a heat insulation material is arranged outside the single-tube reactors 521, and the single-tube reactors 521 comprise a VOC oxidation catalyst 5210, a sealing gasket 5211 and a metal shell 5212.
The catalytic oxidation component 5 is connected with an emergency exhaust valve EV1 and a pressure controller P1, a catalyst over-temperature and cold air device is arranged between the heating component 51 and the catalytic component 52, the catalyst over-temperature and cold air device is composed of an air supplementing electric valve V2 and a cooling fan F3, one end of the air supplementing electric valve V2 is connected with a pipeline between the heating component 51 and the catalytic component 52 through the cooling fan F3, and the other end of the air supplementing electric valve V2 is communicated with the atmosphere.
In the catalytic oxidation module 5, a heating module inlet temperature controller T510 is arranged at an inlet of the heating module 51, a heating module outlet temperature controller T511 is arranged at an outlet of the heating module 51, a catalytic module inlet temperature controller T520 is arranged at an inlet of the catalytic module 52, and a catalytic module outlet temperature controller T521 is arranged at an outlet of the catalytic module 52. 6 cold junction entrances of heat exchange assembly are provided with heat exchange assembly cold junction entry temperature controller T60, 6 cold junction exports of heat exchange assembly are provided with heat exchange assembly cold junction exit temperature controller T61.
The ammonia injection assembly 7 comprises an ammonia storage tank 71, an ammonia delivery pump 72, an ammonia metering unit 73, an ammonia atomization injection unit 74 and an exhaust gas temperature controller T70.
Wherein the SCR catalyst assembly 8 comprises an SCR catalyst 81, a sealing gasket 82 and an SCR catalyst metal housing 83. The inlet of the SCR catalytic assembly 8 is provided with an SCR catalytic assembly inlet temperature controller T80, and the outlet of the SCR catalytic assembly 8 is provided with an SCR catalytic assembly outlet temperature controller T81.
Wherein the inlet of the SCR reactor assembly 8 is provided with an SCR catalyst assembly inlet NOx sensor C80 and the outlet of the SCR catalyst assembly 8 is provided with an SCR catalyst assembly outlet NOx sensor C81.
One end of the dry type filter assembly 1 is connected with an exhaust gas discharge end through an air inlet valve V1, and the other end of the dry type filter assembly 1 is connected with the surface air cooler 2; the outlet of the surface cooler 2 is respectively connected with the inlet of an adsorption area S1 and the inlet of a cooling area S2 of the zeolite rotating wheel assembly 3, and the air volume ratio of the zeolite rotating wheel assembly to the adsorption area S1 to the cooling area S2 is 9: 1-7: 3, an outlet of the adsorption zone S1 is connected with a chimney 11 through an induced draft fan F1; the outlet of the cooling area S2 is connected with the cold-end inlet of the heat exchange assembly 6, the cold-end outlet of the heat exchange assembly 6 is connected with the inlet of the desorption area S2, the outlet of the desorption area S2 is connected with the inlet of the flame arrester assembly 4, and the outlet of the flame arrester assembly 4 is connected with the inlet of the heating assembly 51 in the catalytic-oxidation assembly 5; the outlet of the heating component 51 is connected with the inlet of the catalytic component 52, and the outlet of the catalytic component 52 is connected with the hot end inlet of the heat exchange component 6; the hot end outlet of the heat exchange component 6 is connected with the inlet of the SCR catalytic component 8, and the outlet of the component 8 is connected with a chimney 11 through a desorption induced draft fan F2.
The utility model discloses still provide the method of eliminating NOx and VOCS in coordination, use portable high-efficient integrated device of eliminating NOx and VOCS in coordination, including following step: waste gas containing NOx and volatile organic compounds is used for removing dust and particulate matters in the waste gas through the dry type filtering component 1, the temperature of the waste gas is reduced through the surface cooling component 2 after the organic waste gas is treated by the dry type filtering component 1, part of the organic waste gas is subjected to dust and particulate matter removal and temperature reduction treatment and enters an adsorption area S1 of the zeolite rotating wheel component 3, and the purified gas at an outlet of the adsorption area S1 is discharged into the atmosphere through a chimney 11 through a draught fan F1;
the other part of the gas enters a cooling area S2 of the zeolite rotating wheel assembly 3, the gas at the outlet of the cooling area S2 is heated by a heat exchange assembly 6 and then enters a desorption area S3 of the zeolite rotating wheel assembly 3, the gas at the outlet of the desorption area S3 enters a heating assembly 51 after passing through a flame arrester assembly 4, and when the temperature difference delta T detected by an inlet temperature controller T510 of the heating assembly 51 and an outlet temperature controller T511 of the heating assembly 51 is T511-T510>At a preset temperature, the heating is startedThe component 51 heats the gas, and the heated waste gas enters the catalytic oxidation component 5 for catalytic oxidation; the waste gas after catalytic oxidation enters an SCR catalytic assembly 8 after passing through a heat exchange assembly 6; temperature T detected by exhaust gas temperature controller 75 in ammonia injection assembly 7>When the temperature is preset, the ammonia injection component 7 is started to inject ammonia; controlling the ammonia metering unit 73 of the ammonia injection assembly 7 according to the NOx concentrations detected by the SCR catalyst assembly 8 inlet NOx sensor C80 and the SCR catalyst assembly 8 outlet NOx sensor C81; and the waste gas after passing through the SCR catalytic assembly is discharged into the atmosphere through a chimney 11 by a desorption fan F2. In addition, the catalytic component 51 of the catalytic-oxidation component 5 is formed by assembling a plurality of independent single-tube reactors 521 in parallel, a VOC oxidation catalyst such as a 267x101+152mm catalyst is arranged in the single-tube reactor 521, and when the concentration of VOCs is 5g/m3At a temperature of 280 ℃, the conversion rate is higher than 99%, and VOC in the waste gas can be fully oxidized. A large amount of reaction heat is generated in the catalytic-oxidation reaction process, and is used for VOCs desorption in the adsorption area of the zeolite wheel assembly 3 after heat exchange of the heat exchange assembly 6.
The SCR catalyst component 8 is internally provided with an SCR catalyst, and when the concentration of NOx in inlet exhaust gas is 1000mg/m3， NH3The mol ratio of NOx is 0.85-0.95, and the concentration of NO at the outlet of the SCR catalytic assembly 8 is less than 50mg/m3，NH3The escape rate is less than 3 ppm. Only a small amount of energy needs to be input during the operation of the device.
The single-tube reactor 521, the catalyst 5210 and the metal shell 5212 are sealed by a refractory sealing gasket, 1 to 4 pieces of catalyst 5210 are arranged in the single-tube reactor 521, the diameter of the catalyst 5210 is 190 mm and 700mm, and the height of the catalyst 5210 is 70 to 500 mm.
Wherein the temperature of the catalytic assembly inlet temperature controller T520 is set to be less than 400 ℃, the temperature of the catalytic assembly outlet temperature controller T521 is set to be less than 600 ℃, and when the temperature detected by T520 is greater than 400 ℃ or the temperature detected by T521 is greater than 600 ℃, the catalytic assembly cold air device is started, and meanwhile, the output power of the heating assembly 51 is reduced.
The temperature detected by a temperature controller T70 in the ammonia injection assembly 7 is set to be higher than the preset temperature, the ammonia injection assembly is started to inject ammonia, and the ammonia metering unit 73 of the ammonia injection assembly 7 is controlled according to a NOx sensor C81 at the inlet of the SCR catalytic assembly 8 to control the ammonia injection flow.
After the organic waste gas is subjected to the heat exchange, heating, catalytic-oxidation and SCR reactions, NOx and VOCs in the waste gas are efficiently removed and are thoroughly decomposed into harmless N2、CO2And H2And O, discharging the clean gas into the atmosphere.
The utility model discloses can eliminate NOx and VOCs in coordination, the device is high-efficient stable, solves the problem that contains NOx and contains N organic waste gas oxidation process production NOx, improves catalysis-oxidation, SCR catalytic unit utilization ratio simultaneously. When the concentration of the N waste gas VOCs in the buccal cavity is 100-800mg/m3During the process, the purification efficiency of the adsorption area of the zeolite runner module is more than 90 percent, the removal efficiency of the catalytic-oxidation module on VOCs can reach more than 99 percent, the removal efficiency of the SCR catalytic assembly on NOx is more than 95 percent, and the NOx in the outlet waste gas is<50mg/m3，NH3The escape is less than 3 ppm. Furthermore, the utility model discloses a device need not civil engineering, installation, and is portable strong.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. A device for synergistically eliminating NOx and VOCs in exhaust gas is characterized by comprising a dry filter (1), a surface cooling component (2), a zeolite rotating wheel component (3), a flame arrester component (4), a catalytic oxidation component (5), a heat exchanger (6), an ammonia spraying component (7) and an SCR catalytic component (8), wherein the dry filter (1) is connected with the zeolite rotating wheel component (3) through the surface cooling component (2), the zeolite rotating wheel component (3) is provided with two gas outlets and is respectively communicated with the flame arrester component (4) and the heat exchanger (6), the flame arrester component (4) is communicated with the catalytic oxidation component (5), the catalytic oxidation component (5) is communicated with the heat exchanger (6), and an ammonia spraying component (7) is arranged on a pipeline between the catalytic oxidation component (5) and the heat exchanger (6), the heat exchanger (6) is communicated with the SCR catalytic assembly (8).
2. The apparatus for synergistic elimination of NOx and VOCs from exhaust gas as claimed in claim 1, wherein said zeolite wheel assembly (3) comprises a zeolite wheel and a driving means, said zeolite wheel being provided with an adsorption zone (S1), a desorption zone (S3) and a cooling zone (S2), said adsorption zone (S1), desorption zone (S3) and cooling zone (S2) being alternated with the circumferential rotation of the zeolite wheel, the outlet of said apparent cooling module being in communication with the inlet of the adsorption zone (S1) and the inlet of the cooling zone (S2), respectively; the cooling zone (S2) is in communication with a desorption zone (S3) via a heat exchange assembly, the outlet of the desorption zone (S3) being in communication with the inlet of the flame arrestor assembly (4).
3. The device for the synergistic elimination of NOx and VOCs from exhaust gases according to claim 2, wherein the catalytic-oxidation assembly (5) comprises a heating device (51) and a catalytic device (52), the inlet of the heating device being in communication with the outlet of the flame arrester assembly (4), the outlet of the heating device (51) being connected to the inlet of the catalytic device (52), the outlet of the catalytic device (52) being in communication with the heat exchanger (6).
4. The device for the synergistic elimination of NOx and VOCs in exhaust gas according to claim 3, wherein a catalyst over-temperature and cool air assembly is arranged between the heating device (51) and the catalytic device (52), the catalyst over-temperature and cool air assembly comprises an electric cooling air valve and a cooling fan, one end of the electric cooling air valve is communicated with a pipeline between the heating device (51) and the catalytic device (52) through the cooling fan, and the other end of the electric cooling air valve is communicated with the atmosphere and used for introducing cold air of the atmosphere to cool the electric cooling air valve when the temperature of gas transmitted to the catalyst is too high.
5. The apparatus for the synergistic elimination of NOx and VOCs in exhaust gas according to claim 3, wherein the catalytic device (52) comprises at least two independent single-tube reactors (521) arranged in parallel and a heat-insulating outer cover sleeved outside the single-tube reactors, and the single-tube reactors (521) comprise a VOC oxidation catalyst (5210), a sealing gasket (5211) and a metal casing (5212) which are sequentially sleeved from inside to outside.
6. The device for the synergistic elimination of NOx and VOCs from exhaust gases according to claim 3, wherein said ammonia injection assembly (7) comprises an ammonia storage tank (71), an ammonia delivery pump (72) and an ammonia atomization injection unit (74), said ammonia atomization injection unit (74) being arranged on the conduit between said catalytic-oxidation assembly (5) and said heat exchanger (6), said ammonia atomization injection unit (74) being in communication with the ammonia storage tank (71) through the ammonia delivery pump (72).
7. The apparatus for co-elimination of NOx and VOCs in exhaust gases according to claim 6, characterized in that the ammonia injection assembly (7) further comprises an ammonia metering unit (73) and an exhaust gas temperature controller (T70), the ammonia metering unit (73) being disposed on a pipeline between the ammonia atomizing and injecting unit (74) and the ammonia delivery pump (72) for measuring the amount of ammonia gas used.
8. The device for the synergistic elimination of NOx and VOCs in exhaust gases according to claim 3, characterized in that the SCR catalytic assembly (8) comprises an SCR catalyst (81), a catalytic assembly sealing gasket (82) and an SCR catalytic assembly metal shell (83) which are sleeved from inside to outside in sequence; and the upper end and the lower end of the SCR catalyst (81) are respectively provided with an air inlet and an air outlet, the air inlet is communicated with a hot end outlet of the heat exchanger (6), and the air outlet is communicated with the chimney (11).
9. The apparatus for the synergistic elimination of NOx and VOCs from exhaust according to any of claims 3-8, further comprising a sensor assembly, said sensor assembly comprising: an air intake valve provided at one end of the dry filter (1); an emergency vent valve (EV1) and a pressure controller (P1) provided on the catalytic-oxidation assembly (5); a heating device inlet temperature controller (T510) and a heating device outlet temperature controller (T511) provided at an inlet and an outlet of the heating device (51), respectively; a catalyst inlet temperature controller (T520) and a catalyst outlet temperature controller (T521) respectively provided at an inlet and an outlet of the catalyst (52); a heat exchanger cold end inlet temperature controller (T60) and a heat exchanger cold end outlet temperature controller (T61) which are respectively arranged at a cold end inlet and an outlet of the heat exchanger (6); an SCR catalyst assembly inlet temperature controller (T80) and an SCR catalyst assembly outlet temperature controller (T81) respectively disposed at an inlet and an outlet of the SCR catalyst assembly (8); an SCR catalyst assembly inlet NOx sensor (C80) and an SCR catalyst assembly outlet NOx sensor (C81) disposed at an inlet and an outlet of the SCR catalyst assembly (8), respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920837227.XU CN210845876U (en) | 2019-06-05 | 2019-06-05 | Device for synergistically eliminating NOx and VOCs in exhaust gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920837227.XU CN210845876U (en) | 2019-06-05 | 2019-06-05 | Device for synergistically eliminating NOx and VOCs in exhaust gas |
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| CN210845876U true CN210845876U (en) | 2020-06-26 |
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