CN115920612A - Industrial waste gas treatment method and device - Google Patents
Industrial waste gas treatment method and device Download PDFInfo
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Abstract
The invention discloses a treatment method for industrial waste gas, which comprises the following steps: s1, preprocessing waste gas; s2, carrying out combustion desulfurization treatment; s3, carrying out UV cracking treatment; s4, low-temperature plasma treatment; s5, treating microorganisms; s6, detecting emission; the invention adds NaCO into a catalytic combustion device 3 With NaHCO 3 The mixed solution of the solution is used for carrying out the next desulfurization treatment on the gas after catalytic combustion, so that the sulfurated gas in the waste gas can be effectively removed; the contact area of the catalytic filler and the waste gas can be effectively increased by adding the porous ceramic honeycomb carrier covered with the catalytic filler slurry into the catalytic combustion device, so that the catalytic combustion efficiency is further improved; through setting up waste gas concentration detecting element and detecting waste gas concentration, discharge after satisfying emission standard and can effectively improve industrial waste gas's treatment effeciency.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a treatment method of industrial waste gas and a purification device thereof.
Background
The industrial waste gas treatment refers to the work of pre-treating waste gas generated in industrial places such as factories and workshops before the waste gas is discharged to the outside so as to reach the national standard of the external discharge of the waste gas.
China goes through several stages from the handicraft industry, the mechanical industry to the modern industry, the society is gradually and clearly divided, the industry is used as a main component part of the second industry, the development is considerable, meanwhile, various air pollutants are easily generated by the industrial combustion and production process, the pollutants mainly comprise solid pollution type waste gas and gaseous pollution type waste gas, the solid pollution type waste gas mainly comprises particulate matters such as smoke dust, aerosol, fine sand and lime, the variety of the gaseous pollutants is more, and the damage to the air is larger if the pollutants are directly discharged.
The gaseous pollutants comprise inorganic waste gas and organic waste gas, the inorganic waste gas comprises hydrocarbons, carbon oxides, sulfur oxides, nitrogen oxides, halogens, compounds thereof and the like, and the organic waste gas comprises hydrocarbons, alcohols, aldehydes, acids, ketones, amines and the like; because the components of the industrial waste gas are more and more complex at present, a single waste gas treatment method has certain limitation on the treatment effect of the industrial waste gas;
therefore, the invention provides a method and a device for treating industrial waste gas, aiming at the problem of poor purification effect in the prior art.
Disclosure of Invention
The invention provides a method for treating industrial waste gas and a purification device thereof, aiming at the problem of limitation of treatment effect in the prior art.
The technical scheme of the invention is as follows: a method for treatment of industrial waste gas, the method comprising the steps of:
s1, pretreatment of waste gas
Collecting industrial waste gas to be treated, introducing the industrial waste gas into a waste gas purification tower from a gas inlet, preliminarily filtering the waste gas through a waste gas pretreatment unit, and introducing the industrial waste gas into a waste gas concentration detection unit to preliminarily detect the concentration and components of the waste gas; wherein, the waste gas pretreatment unit adopts a commercially available activated carbon adsorption plate; the waste gas concentration detection unit comprises a commercially available sulfur dioxide concentration detection probe for detecting sulfur dioxide, a commercially available nitrogen oxide concentration detection probe for detecting nitrogen oxide, a commercially available hydrogen sulfide concentration detection probe for detecting hydrogen sulfide, a commercially available fluorine ion detection probe for detecting fluoride, a commercially available hydrogen chloride detection probe for detecting hydrogen chloride, a carbon monoxide detection probe for detecting carbon monoxide and a commercially available dust concentration detection probe for detecting smoke dust and productive dust;
s2, combustion desulfurization treatment
Introducing the gas detected in the step S1 into a catalytic combustion device for catalytic combustion treatment, calculating the content of sulfide in the catalytic combustion device according to the detection result of the step S1, and putting NaHCO with the mass concentration of 20-25% into the catalytic combustion device according to the content of the sulfide 3 The solution and NaCO with the mass concentration of 2.5 to 5 percent 3 The solution is used for enabling sulfide in the waste gas after catalytic combustion treatment to react completely to obtain sulfur-free gas;
s3, UV cleavage
Introducing the sulfur-free gas treated in the step S2 into a UV cracking device, adjusting the temperature of the UV cracking device to be-30-90 ℃, and reacting for 1-2 h, wherein the UV radiation intensity is 1200-2000 mu m/cm 2 The spectral range is: 350-450 nm;
s4, low-temperature plasma treatment
Cooling the gas treated in the step S3 to room temperature at a cooling rate of 5-10 ℃/min, and opening a low-temperature plasma treatment device to perform low-temperature plasma treatment for 1-2 h;
s5, treating with microorganisms
Introducing the gas treated in the step S4 into a multistage biological filter for biological treatment;
s6, detecting emission
And (4) detecting the concentration and the components of the waste gas treated in the step (S5) by a waste gas detection unit, and if the concentration and the components of the waste gas do not reach the standard, introducing the gas into the gas inlet for recycling S2-S5 again until the concentration and the components of the waste gas meet the emission standard and then discharging. Wherein the emission standard is that the concentration of sulfur dioxide is lower than 80mg/m 3 The concentration of nitrogen oxides is lower than 300mg/L, and the concentration of hydrogen sulfide, fluorinion and hydrogen chloride is lower than 10mg/m 3 Carbon monoxide concentration lower than 5X 10 -6 g/m 3 The concentration of smoke dust and productive dust is less than 200mg/m 3 。
Further, in step S2, the catalytic combustion process includes: introducing the waste gas treated in the step S1 into a catalytic combustion device, adjusting the temperature in the catalytic combustion device to 260-400 ℃, and treating hydrocarbon in the organic gas for 0.5-1 h under the action of a catalytic filler;
description of the drawings: the catalytic combustion process purifies organic waste gas, can remove various organic pollutants simultaneously, has the advantages of simple process flow and high treatment efficiency, can fully remove hydrocarbons in the waste gas by keeping the temperature between 260 and 400 ℃, and can effectively save the treatment cost.
Further, the preparation method of the catalytic filler comprises the following steps: the preparation mass ratio is 3-5: 2, manganese dioxide and copper oxide compound, wherein the mass volume ratio is 1g: adding 50-200 mL of water into the composite to prepare slurry, and coating the slurry on a plurality of porous ceramic honeycomb carriers with surfaces covered with active alumina films to obtain the catalytic filler;
description of the drawings: the mass ratio of 3-5: 2, the manganese dioxide and copper oxide compound as catalytic filler can accelerate the catalytic reaction process, and the prepared slurry can fully cover the porous ceramic honeycomb carrier to increase the contact area and further improve the catalytic combustion efficiency.
Further, in step S4, the method of low temperature plasma processing is: adjusting the temperature of the low-temperature plasma device to-50 ℃, turning on a high-voltage power supply, and adjusting discharge parameters; wherein, the discharge voltage in the discharge parameter is: 5-25 kv, and the discharge frequency is 7-20 kHz;
description of the drawings: the discharge voltage is kept between 5 and 25kv, and the discharge frequency is kept between 7 and 20kHz, so that the industrial waste gas can be effectively decomposed and converted into harmless substances, and the waste gas is purified.
Further, the biological treatment method comprises the following steps: according to the volume ratio of 1:1, simultaneously introducing a sodium hydroxide solution with the mass concentration of 60% and waste gas to be treated into a biological filter, and filtering the waste gas to be treated sequentially through a filter material layer; wherein the flow velocity of the waste gas inlet is 250-350 m 3 H, the reaction time is 20-40 min; the filter material layer is a composite filter material layer formed by mixing PP plastic honeycomb activated carbon and crushed stone type fly ash ceramsite according to a mass ratio of 1;
description of the invention: the acidic gas in the polluted waste gas can be dissolved by adding the sodium hydroxide solution, the polluted gas in the waste gas can be adsorbed by the PP plastic honeycomb activated carbon and the crushed stone type fly ash ceramsite according to the mass ratio of 1.
A treatment device for industrial waste gas comprises a waste gas purification tower, a waste gas pretreatment unit connected with one end of the waste gas purification tower, a discharge unit arranged at the other end of the waste gas purification tower, and a waste gas concentration detection unit respectively arranged in the waste gas pretreatment unit and the discharge unit;
description of the drawings: the exhaust gas concentration detection unit can detect the exhaust gas concentration, ensures to discharge after meeting the discharge condition, thereby improving the exhaust gas treatment effect.
Furthermore, the waste gas purification tower comprises a tower body, and a catalytic combustion device, a UV cracking device, a low-temperature plasma treatment device and a multi-stage biological filter module which are sequentially arranged in the tower body from left to right through baffle groups;
the waste gas pretreatment unit comprises a dust removal module and a dust collection module connected with the dust removal module;
description of the invention: can control each reaction chamber's reaction time through baffle group, dust removal module and dust collection module can effectively collect the smoke and dust in the waste gas and productive dust.
Further, the baffle group comprises a shaft rod arranged in the tower body, a baffle body arranged on the shaft rod, and a motor for providing rotating power for the shaft rod;
description of the drawings: the internal rotation realizes the control of gas circulation, so that the leakage of untreated waste gas from the baffle is avoided, and the device is more environment-friendly and safer; the motor controls the opening and closing, the automation degree of the device is improved, and the waste gas treatment is more efficient.
Further, the dust removal module comprises a first box body, a cathode group arranged in the center of the first box body, a mounting piece circumferentially arranged at the top of the first box body, an anode group arranged on the mounting piece and positioned at the periphery of the cathode group, and a power supply used for supplying power to the cathode group and the anode group; the dust collecting module comprises a collecting funnel connected with the first box body and an adsorption filter screen arranged in the collecting funnel;
description of the drawings: the anode group circumferentially arranged on the periphery of the cathode group can effectively remove dust and save space.
Furthermore, the multi-stage biofilter module comprises a pool body, a bearing layer, a first filter material layer and a second filter material layer which are arranged in the pool body from bottom to top, and a spraying device arranged at the top of the pool body; the spraying device comprises a water inlet pipe arranged at the top of the tank body, a plurality of spraying nozzles arranged on the water inlet pipe at intervals, and an alkaline solution water tank connected with the water inlet end of the water inlet pipe;
description of the invention: alkaline solution can absorb hydrogen chloride, fluoride in the waste gas, and the shower nozzle that drenches that a plurality of intervals set up can be simultaneously to the inside injection sodium hydroxide solution of cell body to effectively increase the scope of spraying, industrial waste gas is got rid of to the high efficiency.
Compared with the prior art, the invention has the beneficial effects that: the invention adds NaCO into a catalytic combustion device 3 With NaHCO 3 The mixed solution is used for carrying out the next desulfurization treatment on the gas after catalytic combustion, so that the sulfuration gas in the waste gas can be effectively removed; the contact area of the catalytic filler and the waste gas can be effectively increased by adding the porous ceramic honeycomb carrier covered with the catalytic filler slurry into the catalytic combustion device, so that the catalytic combustion efficiency is further improved; through setting up waste gas concentration detecting element and detecting waste gas concentration, discharge after satisfying emission standard and can effectively improve industrial waste gas's treatment effeciency.
Drawings
FIG. 1 is a schematic structural view of embodiment 8 of the present invention;
FIG. 2 is a sectional view of a multi-stage biofilter module according to example 8 of the present invention;
fig. 3 is a sectional view of a dust removing module according to embodiment 9 of the present invention.
The device comprises a waste gas purification tower 1, a waste gas purification tower 10, a baffle group 11, a tower body 12, a catalytic combustion device 13, a UV cracking device 14, a low-temperature plasma treatment device 15, a multi-stage biological filter module 151, a tank body 152, a supporting layer 153, a filter material layer 154, a spraying device 2, a waste gas pretreatment unit 21, a dust removal module 211, a first tank body 212, a cathode group 213, an installation part 214, an anode group 214, a dust collection module 22, a dust collection funnel 221, an adsorption filter screen 222 and a waste gas concentration detection unit 3.
Detailed Description
Example 1
A method for treatment of industrial waste gas, the method comprising the steps of:
s1, pretreatment of waste gas
Industrial waste gas to be treated is collected and then is introduced into a waste gas purification tower 1 from a gas inlet, the waste gas is preliminarily filtered through a waste gas pretreatment unit 2, and then is introduced into a waste gas concentration detection unit 3 to preliminarily detect the concentration and components of the waste gas; wherein, the waste gas pretreatment unit 2 adopts a commercial active carbon adsorption plate; the exhaust gas concentration detection unit 3 comprises a commercially available sulfur dioxide concentration detection probe for detecting sulfur dioxide, a commercially available nitrogen oxide concentration detection probe for detecting nitrogen oxide, a commercially available hydrogen sulfide concentration detection probe for detecting hydrogen sulfide, a commercially available fluorine ion detection probe for detecting fluoride, a commercially available hydrogen chloride detection probe for detecting hydrogen chloride, a carbon monoxide detection probe for detecting carbon monoxide, and a commercially available dust concentration detection probe for detecting smoke dust and productive dust;
and (3) detection results: the waste gas of a certain industrial plant is detected by a waste gas concentration detection unit 3, wherein the detected concentration of the sulfur dioxide is 105.4mg/m 3 The concentration of nitrogen oxides is 330mg/L and the concentration of hydrogen sulfide is 26.3mg/m 3 The fluoride concentration is 6.7mg/m 3 19.5mg/m of hydrogen chloride 3 Carbon monoxide concentration of 2.6ppm, and soot and productive dust concentration of 3.2mg/m 3 ；
S2, combustion desulfurization treatment
Introducing the waste gas treated in the step S1 into a catalytic combustion device 12, adjusting the indoor temperature of the catalytic combustion device to 260 ℃, treating hydrocarbon in the organic gas for 0.5h under the action of catalytic filler, calculating the content of sulfur dioxide and hydrogen sulfide in the catalytic combustion device 12 according to the detection result and by combining the volume of the catalytic combustion device 12 and the concentration of sulfur dioxide and hydrogen sulfide, and then placing NaHCO with the mass concentration of 20% into the catalytic combustion device 12 3 110ml of NaCO solution with the mass concentration of 2.5 percent 3 30ml of solution (the actual addition amount is a little more than the theoretical addition amount so as to ensure complete reaction with sulfide) so as to ensure complete reaction of sulfide in the waste gas after catalytic combustion treatment and obtain sulfur-free gas; the preparation method of the catalytic filler comprises the following steps: the preparation mass ratio is 3:2, manganese dioxide and copper oxide compound according to the mass volume ratio of 1:50g/mL of water is added into the composite to prepare slurry, and the slurry is coated on a porous ceramic honeycomb carrier the surface of which is covered with an activated alumina film and then is placed into a catalytic combustion device 12; wherein the activated alumina coating is thinThe porous ceramic honeycomb carrier of the membrane adopts the structure of the prior art;
s3, UV cleavage
Introducing the sulfur-free gas treated in the step S2 into a UV cracking device 13, adjusting the temperature of the UV cracking device 13 to 30 ℃, and reacting for 1.5h, wherein the UV radiation intensity is 1500 mu m/cm 2 The spectral range is: 400nm;
s4, low-temperature plasma treatment
Cooling the gas treated in the step S3 to room temperature at a cooling rate of 5-10 ℃/min, and opening a low-temperature plasma treatment device to perform low-temperature plasma treatment for 1-2 h; wherein, the processing steps of the low-temperature plasma device are as follows: adjusting the temperature of the low-temperature plasma device to be 20 ℃, turning on a high-voltage power supply, and adjusting discharge parameters; wherein, the discharge voltage in the discharge parameter is: 20kv and a discharge frequency of 15kHz.
S5, treating with microorganisms
Introducing the gas treated in the step S4 into a multistage biological filter for biological treatment; wherein, the steps of multistage biological filter treatment are as follows: according to the volume ratio of 1:1, simultaneously introducing a sodium hydroxide solution with the mass concentration of 60% and waste gas to be treated into the biological filter, and filtering the waste gas to be treated sequentially through a filter material layer; wherein the flow rate of the waste gas inlet is 250m 3 The reaction time is 20min, and the filter material layer is a composite filter material layer formed by mixing PP plastic honeycomb activated carbon and crushed stone type fly ash ceramsite according to the mass ratio of 1;
s6, detecting emission
And (4) detecting the concentration and the components of the waste gas treated in the step (S5) through a waste gas detection unit (3), introducing the gas into the gas inlet to circulate S2-S5 again according to the detection result if the concentration and the components do not reach the standard, and discharging the gas until the concentration and the components meet the discharge standard.
The exhaust gas purification tower 1, the catalytic combustion device 12, and the UV cracking device 13 all adopt the structure of the prior art, and those skilled in the art can select a corresponding suitable product according to the needs, and are not particularly limited herein.
Example 2
Different from the embodiment 1, the exhaust gas treated in the step S1 is introduced into the catalytic combustion device 12, the indoor temperature of the catalytic combustion device is adjusted to 320 ℃, and under the action of the catalytic filler, the hydrocarbon in the organic gas is treated for 0.8h.
Example 3
Different from the embodiment 1, the waste gas treated in the step S1 is introduced into the catalytic combustion device 12, the indoor temperature of the catalytic combustion device is adjusted to 400 ℃, and under the action of the catalytic filler, the hydrocarbon in the organic gas is treated for 1.0h.
Example 4
Different from the embodiment 1, the preparation method of the catalytic filler comprises the following steps: the preparation mass ratio is 2:1, manganese dioxide and copper oxide compound, according to the mass volume ratio of 1g: and 120mL of water is added into the composite to prepare slurry, and the slurry is coated on a porous ceramic honeycomb carrier with the surface covered with an activated alumina film, so that the catalytic filler is obtained.
Example 5
Different from the embodiment 1, the preparation method of the catalytic filler comprises the following steps: the preparation mass ratio is 5:2, manganese dioxide and copper oxide compound, wherein the mass volume ratio is 1g: and adding 200mL of water into the composite to prepare slurry, and coating the slurry on a porous ceramic honeycomb carrier with the surface covered with an activated alumina film to obtain the catalytic filler.
Example 6
Unlike example 1, wherein in step S5, the method of biological treatment: according to the volume ratio of 1:1, simultaneously introducing a sodium hydroxide solution with the mass concentration of 60% and waste gas to be treated into the biological filter, and filtering the waste gas to be treated sequentially through a filter material layer; wherein the flow velocity of the waste gas inlet is 300m 3 The reaction time is 30min, and the filter material layer is a composite filter material layer formed by mixing PP plastic honeycomb activated carbon and crushed stone type fly ash ceramsite according to the mass ratio of 1.
Example 7
Unlike in example 1, in step S5, the method of biological treatment: according to the volume ratio of 1:1, simultaneously introducing a sodium hydroxide solution with the mass concentration of 60% and waste gas to be treated into the biological filter, and treating the waste gas to be treatedThe waste gas is filtered through a filter material layer in sequence; wherein the flow velocity of the waste gas inlet is 350m 3 The reaction time is 40min, and the filter material layer is a composite filter material layer formed by mixing PP plastic honeycomb activated carbon and crushed stone type fly ash ceramsite according to the mass ratio of 1.
Example 8
The present embodiment provides a treatment apparatus for industrial waste gas based on the method of embodiment 1, as shown in fig. 1, comprising a waste gas purification tower 1, a waste gas pretreatment unit 2 connected to one end of the waste gas purification tower 1, a discharge unit disposed at the other end of the waste gas purification tower 1, and a waste gas concentration detection unit 3 disposed inside the waste gas pretreatment unit 2 and the discharge unit respectively; wherein, the waste gas pretreatment unit adopts a commercial active carbon adsorption plate;
the waste gas purification tower 1 comprises a tower body 11, and a catalytic combustion device 12, a UV cracking device 13, a low-temperature plasma treatment device 14 and a multi-stage biofilter module 15 which are sequentially arranged in the tower body 11 from left to right through a baffle group 10; the baffle group 10 comprises a shaft rod arranged in the tower body 11, a baffle body arranged on the shaft rod, and a motor for providing rotating power for the shaft rod; wherein, there are 5 baffle groups 10;
as shown in fig. 2, the multi-stage biofilter module 15 includes a tank body 151, a supporting layer 152 and a filter material layer 153 arranged in the tank body 151 from bottom to top, a spraying device 154 arranged at the top of the tank body 151, an air inlet arranged at the top of one side of the tank body 151, and an air outlet arranged at the bottom of one side of the tank body 151; the spraying device 154 includes a water inlet pipe disposed at the top of the tank body 151, 6 spraying nozzles sequentially disposed on the water inlet pipe, and an alkaline solution tank connected to the water inlet end of the water inlet pipe.
The working principle is as follows: the working principle of the device of the present invention is briefly explained below.
Industrial waste gas lets in waste gas preprocessing unit 2 earlier after collecting, and the active carbon adsorption board preliminarily adsorbs the smoke and dust and the productive dust in to waste gas, then changes the axostylus axostyle and makes waste gas get into catalytic combustion device 12 through baffle group, adjusts the burning parameter in catalytic combustion device 12 and handles 0.5h, then to urgingNaHCO in a proportion of 20% by mass in the combustion apparatus 12 3 Solution, naCO with mass concentration of 2.5% 3 Solution desulfurization treatment, after the reaction, the shaft lever is rotated to enable sulfur-free gas to enter the UV cracking device 13 and adjust indoor parameters to react, after the reaction is finished for 1h, the shaft lever is rotated to enable the gas to sequentially enter the low-temperature plasma treatment device 14 and the multi-stage biofilter module 15, then the shower nozzle is opened to spray sodium hydroxide solution into the pool body 151 to preliminarily neutralize the hydrogen chloride and the fluoride, the neutralized gas is sequentially discharged from the gas outlet at the bottom of the pool body 151 through the filter layer, the gas concentration is sequentially detected through the waste gas concentration detection unit 3 arranged at the discharge unit, if the gas does not reach the standard, the gas is introduced into the gas inlet to recycle the S2-S5, and the gas is discharged until the discharge standard is met.
Example 9
Unlike embodiment 8, as shown in fig. 3, the exhaust gas pretreatment unit 2 includes a dust removal module 21, and a dust collection module 22 connected to the dust removal module 21;
the dust removal module 21 comprises a first box body 211, a cathode group 212 arranged in the center of a cover plate of the first box body 211, a mounting part 213 arranged on the cover plate of the first box body 211, an anode group 214 uniformly and circumferentially arranged on the mounting part 213 and positioned at the periphery of the cathode group 212, and a power supply for supplying power to the cathode group 212 and the anode group 214; the dust collection module 22 includes a collection funnel 221 connected with the first case 211, and an adsorption screen 222 disposed inside the collection funnel 221.
The working principle of this embodiment is substantially the same as that of embodiment 8, except that the power supply is turned on, the cathode set 212 and the anode set 214 are respectively electrified to adsorb dust particles in the flue gas, the separated large particles fall into the collecting hopper 221 and are adsorbed on the filter screen 222, and the removal and collection of the smoke dust and productive dust are performed, so that the automation degree is high compared with the activated carbon adsorption plate in embodiment 6, and the activated carbon adsorption plate has the characteristic of high-efficiency dust removal.
Examples of the experiments
1. The influence of catalytic combustion parameters and different additives in sulfur fixation treatment on waste gas treatment is explored:
the sulfur dioxide concentration and the hydrogen sulfide concentration in the exhaust gas before and after treatment in example 1, example 2, example 3, comparative example 1 and comparative example 2 were measured by using a commercially available sulfur dioxide concentration detection probe and a commercially available hydrogen sulfide concentration detection probe, respectively; the results are shown in table 1:
comparative example 1: introducing the gas detected in the step S1 into a catalytic combustion device 12 for catalytic combustion treatment, and then directly discharging the gas to a UV cracking device;
comparative example 2: introducing the gas detected in the step S1 into a catalytic combustion device 12 for catalytic combustion treatment, and then placing NaHCO with the mass concentration of 20% into the catalytic combustion device 12 3 140ml of solution is used for ensuring that sulfide in the waste gas after catalytic combustion treatment completely reacts to obtain sulfur-free gas;
TABLE 1 measurement values of sulfur dioxide and hydrogen sulfide concentrations before and after the measurements of examples 1 to 3, comparative example 1 and comparative example 2
And (4) conclusion: as can be seen from the data of examples 1 to 3 and comparative example 1 in table 1, the sulfur fixation treatment can effectively remove the sulfide in the industrial waste gas, thereby improving the waste gas treatment efficiency; comparative examples 1 to 3 and comparative example 2 data were obtained for NaHCO 3 Adding NaCO into the solution 3 The solution can further improve the treatment efficiency of sulfide, and NaCO 3 The solution has little influence on the desulfurization effect within the range of 2.5-5% by mass, and the embodiment 1 is the optimal scheme by comprehensive consideration.
2. The influence of the catalytic filler on the treatment of exhaust gas is explored:
the sulfur dioxide and hydrogen sulfide concentrations in the exhaust gas before and after treatment in examples 1, 4, 5 and 3 were measured by a commercially available carbon monoxide concentration detection probe and a commercially available nitrogen oxide concentration detection probe, respectively, and the results are shown in table 2:
comparative example 3: the preparation method of the catalytic filler comprises the following steps: according to the mass-to-volume ratio of 1g: adding water into 200mL of manganese dioxide solid to prepare slurry, and coating the slurry on a porous ceramic honeycomb carrier with the surface covered with an active alumina film to obtain the catalytic filler;
table 2 measurement values of concentrations of carbon monoxide and nitrogen oxide before and after the detection in example 1, example 2, example 3 and comparative example 3
And (4) conclusion: as is clear from examples 1, 4 and 5 in table 2, the treatment effect on carbon monoxide and nitrogen oxides is not so large when manganese dioxide and copper oxide composite is used as a catalyst filler, and from comparison of the data in example 5 and comparative example 3, it is found that the treatment efficiency on carbon monoxide and nitrogen oxides is lowered by using only manganese dioxide as a catalyst filler, and thus example 1 is the most preferable embodiment.
3. Explore the influence of the biological treatment method on the waste gas treatment
The fluoride and hydrogen chloride concentrations in the exhaust gas before and after treatment in examples 1, 6, 7 and 4 were measured by a commercially available fluoride ion detection probe and a commercially available hydrogen chloride detection probe, respectively, and the results are shown in table 3:
comparative example 4: in contrast to example 1, in step S5, the method of biological treatment: according to the volume ratio of 1:1, simultaneously introducing a sodium hydroxide solution with the mass concentration of 60% and waste gas to be treated into the biological filter, and filtering the waste gas to be treated sequentially through a filter material layer; wherein the flow velocity of the waste gas inlet is 250m 3 H, reaction timeThe time is 20min, and the filter material layer is a PP plastic honeycomb activated carbon filter material layer.
TABLE 3 measurement values of fluoride and HCl concentrations before and after detection in example 1, example 6, example 7 and comparative example 4
And (4) conclusion: as can be seen from examples 1, 6 and 7 in table 3, the intake flow rate and the reaction time of the exhaust gas have little influence on the treatment of the fluoride and the hydrogen chloride, and the data in example 1 and comparative example 4 are compared, and the composite filter layer formed by mixing the PP plastic type honeycomb activated carbon and the crushed stone type fly ash ceramsite according to the mass ratio of 1 can further absorb the hydrogen chloride and the fluoride, so that the exhaust gas treatment efficiency is effectively improved, and thus, example 1 is still the optimal scheme.
Claims (10)
1. A method for treating industrial waste gas, characterized in that the method comprises the steps of:
s1, pretreatment of waste gas
Industrial waste gas to be treated is collected and then is introduced into a waste gas purification tower (1) from a gas inlet, waste gas is preliminarily filtered through a waste gas pretreatment unit (2), and then is introduced into a waste gas concentration detection unit (3) to preliminarily detect the concentration and components of the waste gas; wherein the waste gas pretreatment unit (2) adopts a commercially available activated carbon adsorption plate;
s2, combustion desulfurization treatment
Introducing the gas detected in the step S1 into a catalytic combustion device (12) for catalytic combustion treatment, calculating the content of sulfide in the catalytic combustion device (12) according to the detection result of the step S1, and filling NaHCO with the mass concentration of 20-25% into the catalytic combustion device (12) according to the content of the sulfide 3 Solution, naC with mass concentration of 2.5-5%O 3 The solution is used for enabling sulfide in the waste gas after catalytic combustion treatment to react completely to obtain sulfur-free gas;
s3, UV cleavage
Introducing the sulfur-free gas treated in the step S2 into a UV cracking device (13), adjusting the temperature of the UV cracking device (13) to be-30-90 ℃, and reacting for 1-2 h, wherein the UV radiation intensity is 1200-2000 mu m/cm 2 The spectral range is: 350-450 nm;
s4, low-temperature plasma treatment
Cooling the gas treated in the step S3 to room temperature at a cooling rate of 5-10 ℃/min, and opening a low-temperature plasma treatment device to perform low-temperature plasma treatment for 1-2 h;
s5, treating with microorganisms
Introducing the gas treated in the step S4 into a multistage biological filter for biological treatment;
s6, detecting emission
And (4) detecting the concentration and the components of the waste gas treated in the step (S5) through a waste gas detection unit (3), and if the concentration and the components do not reach the standard, introducing the gas into the gas inlet to circulate S2-S5 again until the concentration and the components meet the emission standard, and then discharging.
2. The method for treating industrial waste gas according to claim 1, wherein in step S2, the step of catalytic combustion treatment is: and (2) introducing the waste gas treated in the step (S1) into a catalytic combustion device (12), adjusting the temperature in the catalytic combustion device (12) to 260-400 ℃, and treating the hydrocarbon in the organic gas for 0.5-1 h under the action of a catalytic filler.
3. The method for treating industrial waste gas according to claim 2, wherein the catalytic filler is prepared by the following steps: the preparation mass ratio is 3-5: 2, manganese dioxide and copper oxide compound, wherein the mass volume ratio is 1g: and adding 50-200 mL of water into the composite to prepare slurry, and coating the slurry on a porous ceramic honeycomb carrier with the surface covered with an active alumina film to obtain the catalytic filler.
4. The method for treating industrial waste gas according to claim 1, wherein in step S4, the method for low-temperature plasma treatment is as follows: adjusting the temperature of the low-temperature plasma device to-50 ℃, turning on a high-voltage power supply, and adjusting discharge parameters; wherein, the discharge voltage in the discharge parameter is: 5 to 25kv and the discharge frequency is 7 to 20kHz.
5. The method for treating industrial waste gas according to claim 1, wherein in step S5, the biological treatment method comprises: according to the volume ratio of 1:1, simultaneously introducing a sodium hydroxide solution with the mass concentration of 60% and waste gas to be treated into a biological filter, and filtering the waste gas to be treated sequentially through a filter material layer; wherein the flow velocity of the waste gas inlet is 250-350 m 3 The reaction time is 20-40 min, and the filter material layer is a composite filter material layer formed by mixing PP plastic honeycomb activated carbon and crushed stone type fly ash ceramsite according to the mass ratio of 1.
6. The treatment apparatus for the industrial waste gas treatment method according to any one of claims 1 to 5, characterized by comprising a waste gas purification tower (1), a waste gas pretreatment unit (2) connected to one end of the waste gas purification tower (1), a discharge unit provided at the other end of the waste gas purification tower (1), and a waste gas concentration detection unit (3) provided inside the waste gas pretreatment unit (2) and the discharge unit, respectively.
7. The treatment apparatus for an industrial exhaust gas treatment method according to claim 6, wherein the exhaust gas purification tower (1) comprises a tower body (11), and a catalytic combustion apparatus (12), a UV cracking apparatus (13), a low-temperature plasma treatment apparatus (14) and a multi-stage biofilter module (15) which are arranged inside the tower body (11) in this order from left to right through a baffle group (10);
the exhaust gas pretreatment unit (2) comprises a dust removal module (21) and a dust collection module (22) connected with the dust removal module (21).
8. The treatment device for the industrial waste gas treatment method according to claim 7, wherein the baffle group (10) comprises a shaft rod arranged inside the tower body (11), a baffle body arranged on the shaft rod, and a motor for providing rotation power to the shaft rod.
9. The treatment device for the industrial waste gas treatment method according to claim 7, wherein the dust removal module (21) comprises a first tank body (211), a cathode group (212) arranged in the center of the first tank body (211), a mounting member (213) circumferentially arranged on the top of the first tank body (211), an anode group (214) arranged on the mounting member (213) and positioned at the periphery of the cathode group (212), and a power supply for supplying power to the cathode group (212) and the anode group (214); the dust collection module (22) includes a collection funnel (221) connected to the first case (211), and an adsorption screen (222) disposed inside the collection funnel (221).
10. The treatment device for the industrial waste gas treatment method according to claim 7, wherein the multistage biofilter module (15) comprises a tank body (151), a supporting layer (152) and a filter material layer (153) which are arranged in the tank body (151) from bottom to top, and a spraying device (154) arranged at the top of the tank body (151); the spraying device (154) comprises a water inlet pipe arranged at the top of the tank body (151), a plurality of spraying nozzles arranged at intervals on the water inlet pipe, and an alkaline solution water tank connected with the water inlet end of the water inlet pipe.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767015A (en) * | 2009-01-06 | 2010-07-07 | 中国科学院成都有机化学有限公司 | Cu-Mn-based catalytic combustion catalyst for treatment of 'triphen' waste gas and preparation method thereof |
| CN205570058U (en) * | 2016-04-03 | 2016-09-14 | 大连明日环境工程有限公司 | Organic waste gas treatment device |
| CN212039753U (en) * | 2020-03-25 | 2020-12-01 | 陕西天仁雪农业科技有限公司 | Novel organic waste gas deodorization equipment of mill |
| CN213395361U (en) * | 2020-10-20 | 2021-06-08 | 河南三胜环保科技有限公司 | Novel catalytic combustion equipment for treating organic waste gas |
| CN114653149A (en) * | 2022-03-09 | 2022-06-24 | 山东天意设备科技有限公司 | Waste gas purification device and use method thereof |
-
2022
- 2022-11-14 CN CN202211424932.XA patent/CN115920612A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767015A (en) * | 2009-01-06 | 2010-07-07 | 中国科学院成都有机化学有限公司 | Cu-Mn-based catalytic combustion catalyst for treatment of 'triphen' waste gas and preparation method thereof |
| CN205570058U (en) * | 2016-04-03 | 2016-09-14 | 大连明日环境工程有限公司 | Organic waste gas treatment device |
| CN212039753U (en) * | 2020-03-25 | 2020-12-01 | 陕西天仁雪农业科技有限公司 | Novel organic waste gas deodorization equipment of mill |
| CN213395361U (en) * | 2020-10-20 | 2021-06-08 | 河南三胜环保科技有限公司 | Novel catalytic combustion equipment for treating organic waste gas |
| CN114653149A (en) * | 2022-03-09 | 2022-06-24 | 山东天意设备科技有限公司 | Waste gas purification device and use method thereof |
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