CN111389197A - Waste gas purification treatment method - Google Patents
Waste gas purification treatment method Download PDFInfo
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- CN111389197A CN111389197A CN202010230920.8A CN202010230920A CN111389197A CN 111389197 A CN111389197 A CN 111389197A CN 202010230920 A CN202010230920 A CN 202010230920A CN 111389197 A CN111389197 A CN 111389197A
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- 239000002912 waste gas Substances 0.000 title claims abstract description 110
- 238000000746 purification Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000007789 gas Substances 0.000 claims abstract description 55
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000003054 catalyst Substances 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims abstract description 24
- 230000003197 catalytic effect Effects 0.000 claims abstract description 16
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
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- 150000001875 compounds Chemical class 0.000 claims description 9
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- 238000005507 spraying Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 7
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- 238000007599 discharging Methods 0.000 claims description 5
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- 238000002156 mixing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
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- 230000000694 effects Effects 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 8
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- 238000007670 refining Methods 0.000 description 2
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- IHCCLXNEEPMSIO-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)CC(=O)N1CC2=C(CC1)NN=N2 IHCCLXNEEPMSIO-UHFFFAOYSA-N 0.000 description 1
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- HRYZWHHZPQKTII-UHFFFAOYSA-N chloroethane Chemical compound CCCl HRYZWHHZPQKTII-UHFFFAOYSA-N 0.000 description 1
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 description 1
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- 239000008096 xylene Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/38—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of titanium, zirconium or hafnium
-
- B01J35/39—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
Abstract
The invention relates to a waste gas purification treatment method, which comprises the following steps: s1, a water source is connected into the water inlet pipe, water is sprayed out from the atomizing nozzle, S2, waste gas is introduced, the waste gas is humidified and sprayed for 5-10min, S3 is started with a draught fan and an air blower, gas in S2 is sent into the bottom of the treatment chamber, S4 and the waste gas move from bottom to top in the treatment chamber, and are primarily filtered through the filter material plate, so that harmful organic matters in the waste gas and a catalyst fixed on the filter material plate are decomposed under the catalytic action. After the waste gas is sprayed, the waste gas is primarily filtered by the filter material plate, so that harmful organic matters in the waste gas and a catalyst fixed on the filter material plate are decomposed under the catalytic action, the residual particles in the waste gas are adsorbed by the filter screen II, and finally the waste gas is purified and sterilized by the ultraviolet lamp, so that the purpose of purifying the waste gas is achieved.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a waste gas purification treatment method.
Background
At present, a large amount of organic solvents, such as aromatic solvents like benzene, toluene, xylene, etc., and ethanol, isopropanol, ethyl acetate, butyl acetate, butanone, dichloroethane, ethyl chloride, hydrocarbons, etc., are generally used in the printing, spraying, etc. industries. The organic solvents are mainly low-boiling point and volatile organic matters and have certain toxicity, and a considerable part of the organic solvents are finally discharged into the atmosphere in the form of organic waste gas, so that the environment is seriously polluted. Therefore, under the background that the current environment protection situation is severe and the national environment protection investment is increased year by year, the organic components in the exhaust gas are recycled by a proper method, so that the pollution to the environment can be reduced, the resource can be recycled, and the method has strong economic value and environmental protection significance, and therefore the method for purifying and treating the exhaust gas is provided.
Disclosure of Invention
The invention aims to provide a waste gas purification treatment method, which achieves the aim of recycling waste gas.
In order to achieve the purpose, the invention provides the following technical scheme: an exhaust gas purification treatment method is completed by exhaust gas treatment equipment, and specifically comprises the following steps:
and S1, connecting a water source into the water inlet pipe to make the water sprayed out from the atomizing nozzle.
S2, introducing waste gas, humidifying and spraying the waste gas for 5-10 min.
And S3, starting an induced draft fan and an air blower, and sending the gas in the S2 to the bottom of the treatment chamber.
S4, the waste gas moves from bottom to top in the processing chamber, and is primarily filtered by the filter material plate, so that the harmful organic matters in the waste gas and the catalyst fixed on the filter material plate are decomposed under the catalytic action.
S5, the gas primarily filtered by the filter material plate moves upwards continuously, and the residual particles in the waste gas are adsorbed by the second filter screen.
S6, the gas moves upwards continuously, and is purified and sterilized for 6-10min by an ultraviolet lamp.
And S7, discharging the processed gas through a gas outlet.
The surface of the filter material plate is coated with a nano titanium dioxide catalyst, and the preparation method of the nano titanium dioxide catalyst comprises the following steps:
step 1, adding nano titanium dioxide powder into liquid nitrogen, and ultrasonically stirring to uniformly disperse the nano titanium dioxide powder in the liquid nitrogen until the liquid nitrogen is completely volatilized;
the structural formula of compound I is as follows:
wherein n is 9-11.
Preferably, the water in the S1 is sprayed out from the atomizing nozzles at 360 °, so that the atomizing nozzles spray the exhaust gas more uniformly and sufficiently.
Preferably, the large particle dust is filtered by the first filter screen before the exhaust gas in S2 is sprayed.
Wherein, the waste gas treatment equipment comprises a bottom plate, the left side of the top of the bottom plate is fixedly connected with a humidification chamber, the right side of the top of the bottom plate is fixedly connected with a treatment chamber, the top of the bottom plate is provided with a water inlet pipe, the water inlet pipe penetrates through the humidification chamber and extends to the interior of the humidification chamber, the outer surfaces of the two ends of the humidification chamber are fixedly connected with brackets, the two tops of the brackets are respectively and fixedly connected with the top of the inner wall of the humidification chamber, an air inlet is arranged at the center shaft of the left side of the humidification chamber, a first filter screen is arranged inside the air inlet, a draught fan is arranged at one side of the humidification chamber, which is close to the treatment chamber, the two ends of the draught fan are respectively provided with a communicating pipe, one end of the communicating pipe, the filter material board is located the top of air-blower, the treatment chamber inner wall is provided with the filter material board, the filter screen is two in the top of filter material board, the two top left and right sides of filter screen are provided with ultraviolet lamp, two ultraviolet lamp equallys divide do not with treatment chamber inner wall fixed connection, treatment chamber top axis department is provided with the gas outlet, the gas outlet is provided with ooff valve two.
Preferably, the bottom of the support is provided with five atomizing nozzles, and the five atomizing nozzles are all located on the same horizontal plane.
Preferably, a water storage tank is arranged inside the humidifying chamber, a water outlet pipe is arranged on the left side of the bottom of the humidifying chamber and communicated with the water storage tank, and a first switch valve is arranged on the outer side of the water outlet pipe.
Preferably, a protective cover is arranged on the outer side of the air blower, and a through hole is formed in the top of the protective cover.
Preferably, the lower right corner of the treatment chamber is provided with a one-way air vent.
The invention provides a waste gas purification treatment method. The method has the following beneficial effects:
(1) after the waste gas is sprayed, the waste gas is catalyzed and decomposed by the filter material plate, so that harmful organic matters in the waste gas and a catalyst fixed on the filter material plate are decomposed under the catalytic action, the residual particles in the waste gas are adsorbed by the filter screen II, and finally the waste gas is purified and sterilized by the ultraviolet lamp, so that the purpose of purifying the waste gas is achieved.
(2) According to the invention, by arranging the first filter screen, most of particulate matters in the waste gas can be effectively removed, then the waste gas is sprayed, the particulate matters in the waste gas are adsorbed, and by arranging the atomizing nozzle, the atomizing nozzle can spray the waste gas more uniformly and sufficiently, so that the waste gas purification effect is better, the purification efficiency is higher, and the purification treatment requirements of various waste gases can be met.
(3) The method can fully improve the refining effect and sphericity of the nano titanium dioxide by pretreatment in liquid nitrogen, thereby improving the catalytic efficiency of the nano titanium dioxide. More importantly: the compound I and sodium lignosulfonate can synergistically modify the nano titanium dioxide at a specific ratio (3:1) to synergistically improve the catalytic efficiency of the nano titanium dioxide, so that the degradation capability of the filter plate on harmful organic matters is improved, and the waste gas treatment effect is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a top view of the protective cover of the present invention.
In the figure: 1 bottom plate, 2 humidification rooms, 3 processing chambers, 4 inlet tubes, 5 supports, 6 atomizing spouts, 7 air inlets, 8 filter screens I, 9 outlet pipes, 10 communicating pipes, 11 draught fans, 12 air blowers, 13 protective covers, 14 filter screens, 15 filter screens II, 16 ultraviolet lamps and 17 air outlets.
Detailed Description
Example 1
As shown in fig. 1-2, the present invention provides a technical solution: the method for purifying and treating the waste gas is completed by waste gas treatment equipment, and specifically comprises the following steps:
s1, the water source is connected into the water inlet pipe 4, so that the water is sprayed out from the atomizing nozzles 6, and the water is sprayed out from the atomizing nozzles 360 degrees, so that the atomizing nozzles 6 spray the waste gas more uniformly and sufficiently.
And S2, introducing waste gas, humidifying and spraying the waste gas for 5min, and filtering large-particle dust by a first filter screen 8 before spraying the waste gas.
S3, starting the induced draft fan 11 and the blower 12, and sending the gas in S2 to the bottom of the processing chamber 3.
S4, the waste gas moves from bottom to top in the processing chamber 3, and is primarily filtered by the filter plate 14, so that the harmful organic matters in the waste gas and the catalyst fixed on the filter plate 14 are decomposed under the catalytic action. The surface of the filter material plate is coated with a nano titanium dioxide catalyst.
S5, the gas primarily filtered by the filter plate 14 moves upward, and the remaining particles in the exhaust gas are adsorbed by the second filter screen 15.
S6, the gas moves upwards continuously, and is purified and sterilized for 6min by the ultraviolet lamp 16.
And S7, discharging the processed gas through a gas outlet.
The waste gas treatment equipment comprises a bottom plate 1, a humidifying chamber 2 is fixedly connected to the left side of the top of the bottom plate 1, a water storage tank is arranged inside the humidifying chamber 2, a water outlet pipe 9 is arranged on the left side of the bottom of the humidifying chamber 2, the water outlet pipe 9 is communicated with the water storage tank, a first switch valve is arranged on the outer side of the water outlet pipe 9, a treatment chamber 3 is fixedly connected to the right side of the top of the bottom plate 1, a one-way air vent is arranged at the lower right corner of the treatment chamber 3, a water inlet pipe 4 is arranged on the top of the bottom plate 1, the water inlet pipe 4 penetrates through the humidifying chamber 2 and extends into the humidifying chamber 2, brackets 5 are fixedly connected to the outer surfaces of two ends of the humidifying chamber 2, atomizing nozzles 6 are arranged at the bottom of the brackets 5, the number of the atomizing nozzles 6 is five, the five, by arranging the first filter screen 8, most particles in the waste gas can be effectively removed, the waste gas is sprayed, the particles in the waste gas are adsorbed, the atomizing nozzle 6 is arranged to spray the waste gas more uniformly and sufficiently, the waste gas purification effect is better, the purification efficiency is higher, and the purification treatment requirements of various waste gases can be met, one side of the humidifying chamber 2 close to the treatment chamber 3 is provided with the draught fan 11, both ends of the draught fan 11 are provided with the communicating pipes 10, one end of the communicating pipe 10 is connected with the humidifying chamber 2, the other end of the communicating pipe 10 is connected with the bottom of the treatment chamber 3, the bottom of the inner wall of the treatment chamber 3 is fixedly connected with the air blower 12, the outer side of the air blower 12 is provided with the protective cover 13, the top of the protective cover 13 is provided with a through hole, the inner wall of the treatment chamber 3, harmful organic matters in the waste gas are decomposed with the catalytic action of a catalyst fixed on the filter material plate 14, the residual particles in the waste gas are adsorbed through the second filter screen 15, and finally, the waste gas is purified and sterilized through the ultraviolet lamp 16, so that the waste gas purification purpose is achieved, the equipment is simple, the operation is convenient, the removal effect is good, the filter material plate 14 is positioned above the air blower 12, the inner wall of the treatment chamber 3 is provided with the filter material plate 14, the second filter screen 15 is positioned above the filter material plate 14, the left side and the right side of the top of the second filter screen 15 are provided with the ultraviolet lamps 16, the two ultraviolet lamps 16 are uniformly distributed with the inner wall of the treatment chamber 3 respectively and are fixedly connected with the inner wall of the treatment chamber 3.
Example 2
As shown in fig. 1-2, the present invention provides a technical solution: an exhaust gas purification treatment method is completed by exhaust gas treatment equipment, and specifically comprises the following steps:
s1, the water source is connected into the water inlet pipe 4, so that the water is sprayed out from the atomizing nozzles 6, and the water is sprayed out from the atomizing nozzles 360 degrees, so that the atomizing nozzles 6 spray the waste gas more uniformly and sufficiently.
And S2, introducing waste gas, humidifying and spraying the waste gas for 7min, and filtering large-particle dust by a first filter screen 8 before spraying the waste gas.
S3, starting the induced draft fan 11 and the blower 12, and sending the gas in S2 to the bottom of the processing chamber 3.
S4, the waste gas moves from bottom to top in the processing chamber 3, and is primarily filtered by the filter plate 14, so that the harmful organic matters in the waste gas and the catalyst fixed on the filter plate 14 are decomposed under the catalytic action. The surface of the filter material plate is coated with a nano titanium dioxide catalyst.
S5, the gas primarily filtered by the filter plate 14 moves upward, and the remaining particles in the exhaust gas are adsorbed by the second filter screen 15.
S6, the gas moves upwards continuously, and is purified and sterilized for 8min by the ultraviolet lamp 16.
And S7, discharging the processed gas through a gas outlet.
The waste gas treatment equipment comprises a bottom plate 1, a humidifying chamber 2 is fixedly connected to the left side of the top of the bottom plate 1, a water storage tank is arranged inside the humidifying chamber 2, a water outlet pipe 9 is arranged on the left side of the bottom of the humidifying chamber 2, the water outlet pipe 9 is communicated with the water storage tank, a first switch valve is arranged on the outer side of the water outlet pipe 9, a treatment chamber 3 is fixedly connected to the right side of the top of the bottom plate 1, a one-way air vent is arranged at the lower right corner of the treatment chamber 3, a water inlet pipe 4 is arranged on the top of the bottom plate 1, the water inlet pipe 4 penetrates through the humidifying chamber 2 and extends into the humidifying chamber 2, brackets 5 are fixedly connected to the outer surfaces of two ends of the humidifying chamber 2, atomizing nozzles 6 are arranged at the bottom of the brackets 5, the number of the atomizing nozzles 6 is five, the five, by arranging the first filter screen 8, most particles in the waste gas can be effectively removed, the waste gas is sprayed, the particles in the waste gas are adsorbed, the atomizing nozzle 6 is arranged to spray the waste gas more uniformly and sufficiently, the waste gas purification effect is better, the purification efficiency is higher, and the purification treatment requirements of various waste gases can be met, one side of the humidifying chamber 2 close to the treatment chamber 3 is provided with the draught fan 11, both ends of the draught fan 11 are provided with the communicating pipes 10, one end of the communicating pipe 10 is connected with the humidifying chamber 2, the other end of the communicating pipe 10 is connected with the bottom of the treatment chamber 3, the bottom of the inner wall of the treatment chamber 3 is fixedly connected with the air blower 12, the outer side of the air blower 12 is provided with the protective cover 13, the top of the protective cover 13 is provided with a through hole, the inner wall of the treatment chamber 3, harmful organic matters in the waste gas are decomposed with the catalytic action of a catalyst fixed on the filter material plate 14, the residual particles in the waste gas are adsorbed through the second filter screen 15, and finally, the waste gas is purified and sterilized through the ultraviolet lamp 16, so that the waste gas purification purpose is achieved, the equipment is simple, the operation is convenient, the removal effect is good, the filter material plate 14 is positioned above the air blower 12, the inner wall of the treatment chamber 3 is provided with the filter material plate 14, the second filter screen 15 is positioned above the filter material plate 14, the left side and the right side of the top of the second filter screen 15 are provided with the ultraviolet lamps 16, the two ultraviolet lamps 16 are uniformly distributed with the inner wall of the treatment chamber 3 respectively and are fixedly connected with the inner wall of the treatment chamber 3.
Example 3
As shown in fig. 1-2, the present invention provides a technical solution: an exhaust gas purification treatment method is completed by exhaust gas treatment equipment, and specifically comprises the following steps:
s1, the water source is connected into the water inlet pipe 4, so that the water is sprayed out from the atomizing nozzles 6, and the water is sprayed out from the atomizing nozzles 360 degrees, so that the atomizing nozzles 6 spray the waste gas more uniformly and sufficiently.
And S2, introducing waste gas, humidifying and spraying the waste gas for 10min, and filtering large-particle dust by a first filter screen 8 before spraying the waste gas.
S3, starting the induced draft fan 11 and the blower 12, and sending the gas in S2 to the bottom of the processing chamber 3.
S4, the waste gas moves from bottom to top in the processing chamber 3, and is primarily filtered by the filter plate 14, so that the harmful organic matters in the waste gas and the catalyst fixed on the filter plate 14 are decomposed under the catalytic action. The surface of the filter material plate is coated with a nano titanium dioxide catalyst.
S5, the gas primarily filtered by the filter plate 14 moves upward, and the remaining particles in the exhaust gas are adsorbed by the second filter screen 15.
S6, the gas moves upwards continuously, and is purified and sterilized for 10min by the ultraviolet lamp 16.
And S7, discharging the processed gas through a gas outlet.
The waste gas treatment equipment comprises a bottom plate 1, a humidifying chamber 2 is fixedly connected to the left side of the top of the bottom plate 1, a water storage tank is arranged inside the humidifying chamber 2, a water outlet pipe 9 is arranged on the left side of the bottom of the humidifying chamber 2, the water outlet pipe 9 is communicated with the water storage tank, a first switch valve is arranged on the outer side of the water outlet pipe 9, a treatment chamber 3 is fixedly connected to the right side of the top of the bottom plate 1, a one-way air vent is arranged at the lower right corner of the treatment chamber 3, a water inlet pipe 4 is arranged on the top of the bottom plate 1, the water inlet pipe 4 penetrates through the humidifying chamber 2 and extends into the humidifying chamber 2, brackets 5 are fixedly connected to the outer surfaces of two ends of the humidifying chamber 2, atomizing nozzles 6 are arranged at the bottom of the brackets 5, the number of the atomizing nozzles 6 is five, the five, by arranging the first filter screen 8, most particles in the waste gas can be effectively removed, the waste gas is sprayed, the particles in the waste gas are adsorbed, the atomizing nozzle 6 is arranged to spray the waste gas more uniformly and sufficiently, the waste gas purification effect is better, the purification efficiency is higher, and the purification treatment requirements of various waste gases can be met, one side of the humidifying chamber 2 close to the treatment chamber 3 is provided with the draught fan 11, both ends of the draught fan 11 are provided with the communicating pipes 10, one end of the communicating pipe 10 is connected with the humidifying chamber 2, the other end of the communicating pipe 10 is connected with the bottom of the treatment chamber 3, the bottom of the inner wall of the treatment chamber 3 is fixedly connected with the air blower 12, the outer side of the air blower 12 is provided with the protective cover 13, the top of the protective cover 13 is provided with a through hole, the inner wall of the treatment chamber 3, harmful organic matters in the waste gas are decomposed with the catalytic action of a catalyst fixed on the filter material plate 14, the residual particles in the waste gas are adsorbed through the second filter screen 15, and finally, the waste gas is purified and sterilized through the ultraviolet lamp 16, so that the waste gas purification purpose is achieved, the equipment is simple, the operation is convenient, the removal effect is good, the filter material plate 14 is positioned above the air blower 12, the inner wall of the treatment chamber 3 is provided with the filter material plate 14, the second filter screen 15 is positioned above the filter material plate 14, the left side and the right side of the top of the second filter screen 15 are provided with the ultraviolet lamps 16, the two ultraviolet lamps 16 are uniformly distributed with the inner wall of the treatment chamber 3 respectively and are fixedly connected with the inner wall of the treatment chamber 3.
Example 4
The preparation method of the nano titanium dioxide catalyst in the examples 1 to 3 is as follows:
step 1, adding nano titanium dioxide powder into liquid nitrogen, and ultrasonically stirring to uniformly disperse the nano titanium dioxide powder in the liquid nitrogen until the liquid nitrogen is completely volatilized;
the structural formula of compound I is as follows:
wherein n is 10.
Comparative examples 1 to 6
Comparative examples 1 to 6 only changed the composition of the modifier in example 4, and the others were completely the same as in example 4.
And (3) detecting the photocatalytic effect: accurately measuring a certain amount of methylene blue solution, adding a catalyst, fully stirring and adsorbing in a dark place, irradiating by using a xenon lamp, sampling at intervals, filtering by using a water-based filter membrane, taking a filtrate, measuring the absorbance of the solution by using an ultraviolet spectrophotometer, and taking the degradation rate (3h) of the methylene blue as an evaluation index.
| Numbering | A compound I: lignosulfonic acid sodium salt | Degradation rate of methylene blue (3h) |
| Example 4 | 3:1 | 80.3％ |
| Comparative example 1 | Sodium lignosulfonate only | 59.4％ |
| Comparative example 2 | 1:1 | 71.6％ |
| Comparative example 3 | 2:1 | 76.2％ |
| Comparative example 4 | 4:1 | 75.7％ |
| Comparative example 5 | 5:1 | 72.6％ |
| Comparative example 6 | 6:1 | 68.7％ |
From the above table, the pretreatment in liquid nitrogen can fully improve the refining effect and sphericity of the nano titanium dioxide, thereby improving the catalytic efficiency of the nano titanium dioxide. More importantly: the compound I and sodium lignosulfonate can synergistically modify the nano titanium dioxide at a specific ratio (3:1) to synergistically improve the catalytic efficiency of the nano titanium dioxide, so that the degradation capability of the filter plate on harmful organic matters is improved, and the waste gas treatment effect is improved.
In conclusion, after the waste gas is sprayed, the waste gas is primarily filtered through the filter plate 14, harmful organic matters in the waste gas and a catalyst fixed on the filter plate 14 are decomposed under the catalytic action of the catalyst, the residual particles in the waste gas are adsorbed through the filter screen II 15, and finally the waste gas is purified and sterilized through the ultraviolet lamp 16, so that the purpose of purifying the waste gas is achieved, the equipment is simple, convenient to operate and good in removing effect, most of particles in the waste gas can be effectively removed through the filter screen I8, the waste gas is sprayed again, the particles in the waste gas are adsorbed, and the waste gas is sprayed more uniformly and sufficiently through the atomization nozzle 6, so that the waste gas purifying effect is better, the purifying efficiency is higher, and the purifying treatment requirements of various waste gases can be met.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An exhaust gas purification treatment method is characterized in that: the waste gas purification treatment method is completed by waste gas treatment equipment, and specifically comprises the following steps:
s1, connecting a water source to the water inlet pipe (4) to spray water from the atomizing nozzle (6);
s2, introducing waste gas, humidifying and spraying the waste gas for 5-10 min;
s3, starting an induced draft fan (11) and an air blower (12), and sending the gas in the S2 to the bottom of the treatment chamber (3);
s4, the waste gas moves from bottom to top in the processing chamber (3), and is primarily filtered by the filter plate (14), so that harmful organic matters in the waste gas and the catalyst fixed on the filter plate (14) are decomposed under the catalytic action;
s5, the gas primarily filtered by the filter plate (14) moves upwards continuously, and the residual particles in the exhaust gas are adsorbed by the second filter screen (15);
s6, the gas continuously moves upwards, and is purified and sterilized for 6-10min by an ultraviolet lamp (16);
s7, discharging the treated gas through a gas outlet;
the surface of the filter material plate is coated with a nano titanium dioxide catalyst, and the preparation method of the nano titanium dioxide catalyst comprises the following steps:
step 1, adding nano titanium dioxide powder into liquid nitrogen, and ultrasonically stirring to uniformly disperse the nano titanium dioxide powder in the liquid nitrogen until the liquid nitrogen is completely volatilized;
step 2, sequentially adding dimethylformamide and a modifier, and carrying out ultrasonic stirring and centrifugal separation to obtain a nano titanium dioxide catalyst; the modifier is formed by mixing a compound I and sodium lignosulfonate according to a mass ratio of 3:1, wherein the mass ratio of the modifier to the nano titanium dioxide powder is 1: 10;
the structural formula of compound I is as follows:
wherein n is 9-11.
2. The exhaust gas purification treatment method according to claim 1, characterized in that: and the water in the S1 is sprayed out from the atomizing nozzle (6) at 360 degrees, so that the waste gas is sprayed more uniformly and sufficiently by the atomizing nozzle (6).
3. The exhaust gas purification treatment method according to claim 1, characterized in that: and filtering large-particle dust by a first filter screen (8) before the exhaust gas is sprayed in the S2.
4. The exhaust gas purification treatment method according to claim 1, characterized in that: the exhaust gas treatment apparatus includes: the improved humidifier comprises a base plate (1), a humidifier chamber (2) is fixedly connected to the left side of the top of the base plate (1), a treatment chamber (3) is fixedly connected to the right side of the top of the base plate (1), a water inlet pipe (4) is arranged at the top of the base plate (1), the water inlet pipe (4) penetrates through the humidifier chamber (2) and extends to the interior of the humidifier chamber (2), a support (5) is fixedly connected to the outer surface of each of the two ends of the humidifier chamber (2) in an equal mode, the top of the support (5) is respectively fixedly connected with the inner wall top of the humidifier chamber (2), an air inlet (7) is arranged at the center shaft of the left side of the humidifier chamber (2), a first filter screen (8) is arranged inside the air inlet (7), a draught fan (11) is arranged on one side, close to the humidifier chamber (2) and the treatment chamber (3), two, communicating pipe (10) other end is connected bottom treatment room (3), treatment room (3) inner wall bottom fixedly connected with air-blower (12), treatment room (3) inner wall is provided with filter plate (14), filter plate (14) are located the top of air-blower (12), treatment room (3) inner wall is provided with filter plate (14), filter screen two (15) are located the top of filter plate (14), both sides are provided with ultraviolet lamp (16), two about filter screen two (15) top ultraviolet lamp (16) are equallyd divide do not with treatment room (3) inner wall fixed connection, treatment room (3) top axis department is provided with gas outlet (17), gas outlet (17) are provided with ooff valve two.
5. The exhaust gas purification treatment method according to claim 4, characterized in that: the atomizing nozzle is characterized in that atomizing nozzles (6) are arranged at the bottom of the support (5), the number of the atomizing nozzles (6) is five, and the five atomizing nozzles (6) are all located on the same horizontal plane.
6. The exhaust gas purification treatment method according to claim 4, characterized in that: the improved humidifier is characterized in that a water storage tank is arranged inside the humidifying chamber (2), a water outlet pipe (9) is arranged on the left side of the bottom of the humidifying chamber (2), the water outlet pipe (9) is communicated with the water storage tank, and a first switch valve is arranged on the outer side of the water outlet pipe (9).
7. The exhaust gas purification treatment method according to claim 4, characterized in that: the air blower is characterized in that a protective cover (13) is arranged on the outer side of the air blower (12), and a through hole is formed in the top of the protective cover (13).
8. The exhaust gas purification treatment method according to claim 4, characterized in that: the lower right corner of the treatment chamber (3) is provided with a one-way air hole.
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