CN116983817A - Degradation method and device for sulfur-containing malodorous gas substances - Google Patents
Degradation method and device for sulfur-containing malodorous gas substances Download PDFInfo
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- CN116983817A CN116983817A CN202310831390.6A CN202310831390A CN116983817A CN 116983817 A CN116983817 A CN 116983817A CN 202310831390 A CN202310831390 A CN 202310831390A CN 116983817 A CN116983817 A CN 116983817A
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- 239000000126 substance Substances 0.000 title claims abstract description 66
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 64
- 239000011593 sulfur Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 38
- 230000015556 catabolic process Effects 0.000 title claims abstract description 37
- UIIMBOGNXHQVGW-UHFFFAOYSA-M sodium bicarbonate Substances [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 147
- 239000007789 gas Substances 0.000 claims abstract description 113
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 83
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 83
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 45
- 239000011259 mixed solution Substances 0.000 claims abstract description 38
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000012495 reaction gas Substances 0.000 claims abstract description 8
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 105
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 93
- 239000007788 liquid Substances 0.000 claims description 44
- 239000000243 solution Substances 0.000 claims description 42
- 239000008367 deionised water Substances 0.000 claims description 37
- 229910021641 deionized water Inorganic materials 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 230000015654 memory Effects 0.000 claims description 32
- 239000007787 solid Substances 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 19
- 230000000593 degrading effect Effects 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- 229920005372 Plexiglas® Polymers 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 abstract description 26
- -1 sodium bicarbonate activated hydrogen peroxide Chemical class 0.000 abstract description 25
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 10
- 239000010865 sewage Substances 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 239000010806 kitchen waste Substances 0.000 abstract description 7
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 52
- WQOXQRCZOLPYPM-UHFFFAOYSA-N dimethyl disulfide Chemical compound CSSC WQOXQRCZOLPYPM-UHFFFAOYSA-N 0.000 description 48
- 230000000052 comparative effect Effects 0.000 description 11
- 238000001514 detection method Methods 0.000 description 11
- 238000002474 experimental method Methods 0.000 description 11
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 10
- 238000005303 weighing Methods 0.000 description 9
- 230000003213 activating effect Effects 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 6
- 239000013067 intermediate product Substances 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
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- 239000002904 solvent Substances 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 238000007865 diluting Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
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- 230000007423 decrease Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000000802 evaporation-induced self-assembly Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The application discloses a degradation method and a device for sulfur-containing malodorous gas substances, wherein the method comprises the following steps: obtaining a mixed solution with preset concentration; pouring the mixed solution from above the reactor; and introducing the gas to be treated into the lower part of the reactor, mixing the mixed solution with the gas to be treated to degrade sulfur-containing malodorous gas substances in the gas to be treated and output oxidation reaction gas. The method is based on the sodium bicarbonate activated hydrogen peroxide, utilizes the advanced oxidation technology to degrade sulfur-containing malodorous substances, further can cause excessive oxidation and degradation of the sulfur-containing substances, can efficiently remove ammonia gas at low cost, has the advantages of wide application range, rapid reaction, low energy consumption, low cost, easy operation and convenient application, and has great application potential in the aspect of odor treatment of sewage treatment plants and kitchen waste treatment plants.
Description
Technical Field
The application relates to the technical field of odor treatment, in particular to a degradation method and a degradation device for sulfur-containing malodorous gas substances.
Background
Odor is generated during sewage and wastewater treatment. Thus, malodor problems have become a problem that sewage and wastewater treatment has to face. The components of the odor are complex and greatly influenced by the substrate, and researches show that the sulfur-containing malodorous substances are the most contributing components in the malodorous substances, because the odor threshold of the substances such as hydrogen sulfide, methyl mercaptan and dimethyl disulfide is very low, and the odor can be smelled under the condition of very low concentration. The prior deodorization technology can be roughly divided into a physical method, a chemical method, a biological treatment method, a combination method and the like in principle, wherein the physical method mainly comprises an adsorption method, the chemical method mainly comprises a chemical absorption method and an oxidation method, and the biological treatment method mainly comprises a soil treatment method, a biological filter, a biological trickling filter, a biological washing method and the like. Wherein, biological method is unstable, the efficiency is low, compared with the more mature Fenton advanced oxidation technology in chemical method, the cost of adding sodium bicarbonate is lower than ferrous salt, and the sodium bicarbonate can be recycled.
In recent years, advanced oxidation technology has been widely used for degrading various pollutants in the environment due to its advantages of high efficiency, relatively low cost and no secondary pollution, and is considered as one of the most practical methods because advanced oxidation can better control the generation of free radicals. In the advanced oxidation system, the sodium bicarbonate has the advantages of low cost, no toxicity and strong chemical stability. Therefore, the sodium bicarbonate is applied to the preferential substances for removing sulfur-containing malodorous pollutants by activating the advanced oxidation of hydrogen peroxide, and further solves the problems of low efficiency and high cost in the prior art.
Disclosure of Invention
In view of the above, the embodiment of the application provides a degradation method and a degradation device for sulfur-containing malodorous gas substances, which solve the problems of low treatment efficiency and high cost of the existing method.
According to a first aspect, an embodiment of the present application provides a degradation method for a sulfur-containing malodorous gas substance, including:
obtaining a mixed solution with preset concentration;
pouring the mixed solution from above the reactor;
and introducing the gas to be treated into the lower part of the reactor, mixing the mixed solution with the gas to be treated so as to degrade sulfur-containing malodorous gas substances in the gas to be treated and output oxidation reaction gas.
According to the degradation method of the sulfur-containing malodorous gas substances, the sulfur-containing malodorous substances are degraded by using a high-grade oxidation technology based on sodium bicarbonate activated hydrogen peroxide, wherein in a NaHCO3-H2O2 system, intermediate products HCO4-, namely primary oxidation of methyl mercaptan and dimethyl disulfide is realized through an oxygen transfer mechanism assisted by a solvent, and superoxide anions (O2-) and OH free radicals generated by H2O2 or HCO 4-decomposition further cause excessive oxidation of the sulfur-containing substances to degrade, so that ammonia can be removed efficiently and at low cost, and the degradation method has wide application range, rapid reaction, low energy consumption, low cost, easy operation and convenient application, and has great application potential in the aspect of odor treatment of sewage treatment plants and kitchen waste treatment plants.
With reference to the first aspect, in a first implementation manner of the first aspect, the obtaining a mixed solution with a preset concentration includes:
taking a first preset weight of analytically pure sodium bicarbonate solid;
dissolving the sodium bicarbonate solid in deionized water with a second preset weight;
and adding a sodium hydroxide solution into the deionized water to regulate the pH, and then mixing a hydrogen peroxide solution and stirring to obtain the mixed solution.
With reference to the first embodiment of the first aspect, in a second embodiment of the first aspect, the hydrogen peroxide solution is a 30% hydrogen peroxide solution; the stirring time of the mixed solution is 10 minutes; the concentration of the sodium hydroxide solution is 1mol/L.
With reference to the first aspect, in a third implementation manner of the first aspect, the pouring the mixed solution from above the reactor includes: spraying was introduced from above the reactor by means of a pump.
With reference to the first aspect, in a fourth implementation manner of the first aspect, the introducing the gas to be treated into the lower part of the reactor includes: the flow rate of the gas to be treated in the reactor is 0.2-1.2L/min.
With reference to the first embodiment of the first aspect, in a fifth embodiment of the first aspect, the reactor is a closed plexiglass, and the reactor includes:
the gas inlet is used for introducing gas to be treated;
the gas outlet is used for outputting the gas after the advanced oxidation reaction;
a liquid inlet for inputting the hydrogen peroxide solution;
a liquid outlet for discharging the reacted waste liquid;
the air inlet and the air outlet are respectively arranged at two sides of the reactor, and the liquid inlet and the liquid outlet are respectively arranged at the upper end and the lower end of the reactor.
According to the degradation method of the sulfur-containing malodorous gas substances, the sulfur-containing malodorous substances are degraded by using a high-grade oxidation technology based on sodium bicarbonate activated hydrogen peroxide, wherein in a NaHCO3-H2O2 system, intermediate products HCO4-, namely primary oxidation of methyl mercaptan and dimethyl disulfide is realized through an oxygen transfer mechanism assisted by a solvent, and superoxide anions (O2-) and OH free radicals generated by H2O2 or HCO 4-decomposition further cause excessive oxidation of the sulfur-containing substances to degrade, so that ammonia can be removed efficiently and at low cost, and the degradation method has wide application range, rapid reaction, low energy consumption, low cost, easy operation and convenient application, and has great application potential in the aspect of odor treatment of sewage treatment plants and kitchen waste treatment plants.
According to a second aspect, the degradation device for sulfur-containing malodorous gas substances provided by the embodiment of the application comprises:
the first processing module is used for obtaining a mixed solution with preset concentration;
a second treatment module for pouring the mixed solution from above the reactor;
and the third treatment module is used for introducing the gas to be treated into the lower part of the reactor, mixing the mixed solution with the gas to be treated so as to degrade sulfur-containing malodorous gas substances in the gas to be treated and output oxidation reaction gas.
The degradation device for sulfur-containing malodorous gas substances provided by the embodiment utilizes the advanced oxidation technology to degrade the sulfur-containing malodorous substances based on the sodium bicarbonate activated hydrogen peroxide, wherein in a NaHCO3-H2O2 system, intermediate products HCO4-, namely primary oxidation of methyl mercaptan and dimethyl disulfide is realized through a solvent-assisted oxygen transfer mechanism, and superoxide anions (O2-) and OH free radicals generated by H2O2 or HCO 4-decomposition further cause excessive oxidation and degradation of sulfur-containing substances, so that ammonia can be removed efficiently and at low cost, the application range is wide, the reaction is rapid, the energy consumption is low, the cost is low, the operation is easy, the application is convenient, and the degradation device has great application potential in the aspect of odor treatment of sewage treatment plants and kitchen waste treatment plants.
According to a third aspect, an embodiment of the present application provides an electronic device, including: the device comprises a memory and a processor, wherein the memory and the processor are in communication connection, the memory stores computer instructions, and the processor executes the computer instructions so as to execute the degradation method of the sulfur-containing malodorous gas substances in the first aspect or any implementation mode of the first aspect.
According to a fourth aspect, an embodiment of the present application provides a computer readable storage medium storing computer instructions for causing the computer to perform the method for degrading sulfur-containing malodorous gas species described in the first aspect or any one of the embodiments of the first aspect.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for degrading sulfur-containing malodorous gas species according to an embodiment of the present application;
FIG. 2 is a schematic structural view of an apparatus for degrading sulfur-containing malodorous gas substances using sodium bicarbonate activated hydrogen peroxide according to a preferred embodiment of the present application;
FIG. 3 is a graph showing the effect of different hydrogen peroxide to sodium bicarbonate concentration ratios on methyl mercaptan degradation according to a preferred embodiment of the present application;
FIG. 4 is a schematic illustration of the effect of different gas flows on methyl mercaptan degradation according to a preferred embodiment of the present application;
FIG. 5 is a graph showing the effect of different hydrogen peroxide to sodium bicarbonate concentration ratios on methyl mercaptan degradation according to a preferred embodiment of the present application;
FIG. 6 is a schematic diagram showing the effect of different gas flows on the degradation of dimethyl disulfide in accordance with a preferred embodiment of the present application;
FIG. 7 is a schematic illustration of the effect of different gas flows on the degradation of hydrogen sulfide in accordance with a preferred embodiment of the present application;
FIG. 8 is a functional block diagram of a sulfur-containing malodorous gas species degradation device according to an embodiment of the present application;
fig. 9 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment provides a degradation method of sulfur-containing malodorous gas substances, which can be used for electronic equipment such as computers, mobile phones, tablet computers and the like. Fig. 1 is a flow chart of a method for degrading sulfur-containing malodorous gas species according to an embodiment of the present application. As shown in fig. 1, the process includes the steps of:
s11, obtaining a mixed solution with a preset concentration.
Wherein, preparing a mixed solution of sodium bicarbonate and hydrogen peroxide with certain concentration: weighing analytically pure sodium hydroxide solid, adding deionized water for dissolution, adding sodium bicarbonate solution for dilution into deionized water, stirring uniformly, adding a little sodium hydroxide solution, and stirring uniformly to obtain a mixed solution. The detailed information will be described in the following steps, and the detailed description of this embodiment will not be repeated.
S12, pouring the mixed solution from above the reactor. And the mixed solution is filled above the reactor, so that the mixed solution is conveniently mixed with the gas to be treated after being sprayed out above the reactor, and degradation reaction further occurs. The detailed information will be described in the following steps, and the detailed description of this embodiment will not be repeated.
And S13, introducing the gas to be treated into the lower part of the reactor, and mixing the mixed solution with the gas to be treated to degrade sulfur-containing malodorous gas substances in the gas to be treated and output oxidation reaction gas. The detailed information will be described in the following steps, and the detailed description of this embodiment will not be repeated.
According to the degradation method of the sulfur-containing malodorous gas substances, the sulfur-containing malodorous substances are degraded by using an advanced oxidation technology based on the sodium bicarbonate activated hydrogen peroxide, wherein in a NaHCO3-H2O2 system, intermediate products HCO4-, namely primary oxidation of methyl mercaptan and dimethyl disulfide is realized through an oxygen transfer mechanism assisted by a solvent, and superoxide anions (O2-) and OH free radicals generated by H2O2 or HCO 4-decomposition further cause excessive oxidation of the sulfur-containing substances to degrade, so that ammonia can be removed efficiently and at low cost, the application range is wide, the reaction is rapid, the energy consumption is low, the cost is low, the operation is easy, the application is convenient, and the degradation method has great application potential in the aspect of odor treatment of sewage treatment plants and kitchen waste treatment plants.
In another embodiment, a method for degrading sulfur-containing malodorous gas substances is further provided, and the method for degrading sulfur-containing malodorous gas substances according to the embodiment of the application comprises the following steps:
s21, obtaining a mixed solution with a preset concentration.
Specifically, the step S21 further includes the steps of:
s211, taking a first preset weight of analytically pure sodium bicarbonate solid.
42g of analytically pure sodium bicarbonate solids were weighed and 40g of analytically pure sodium hydroxide solids were weighed. It should be noted that, the embodiment is only illustrated by taking the preset weight as an example, and other reasonable weights can be adopted in practical application, so long as the ratio can be ensured, and the embodiment is not limited to this.
And S212, dissolving sodium bicarbonate solid in deionized water with a second preset weight.
Adding deionized water to dissolve and fix the volume to 500mL respectively to obtain 1mol/L sodium bicarbonate solution; adding deionized water to dissolve and fix the volume to 1L to obtain 1mol/L sodium hydroxide solution; it should be noted that, the embodiment is only illustrated by taking the preset weight as an example, and other reasonable weights can be adopted in practical application, so long as the ratio can be ensured, and the embodiment is not limited to this.
And S213, adding a sodium hydroxide solution into deionized water to adjust the pH, and then mixing a hydrogen peroxide solution and stirring to obtain a mixed solution.
Respectively diluting 1, 1.3, 2, 4 and 10mL of the sodium bicarbonate solution into 2L of deionized water, uniformly stirring, adding a little of sodium hydroxide solution until the pH value of the solution is 10, adding 2mL of 30% hydrogen peroxide solution, stirring for 10min, and uniformly obtaining sodium bicarbonate activated hydrogen peroxide solution (the concentration ratio of hydrogen peroxide to sodium bicarbonate is 20-2:1), wherein the comparative experiment is that 2L of deionized water is singly added with 2mL of 30% hydrogen peroxide solution. Wherein the concentration of the sodium hydroxide solution is 1mol/L.
S22, pouring the mixed solution from above the reactor. Spraying was introduced from above the reactor by means of a pump. Referring to step S12 in detail, the description of this embodiment is omitted.
S23, introducing the gas to be treated into the lower part of the reactor, and mixing the mixed solution with the gas to be treated to degrade sulfur-containing malodorous gas substances in the gas to be treated, wherein the flow rate of the gas to be treated of the output oxidation reaction gas in the reactor is 0.2-1.2L/min.
Specifically, the gas to be treated is introduced below the side of the reactor, and under certain conditions, advanced oxidation reaction is carried out to degrade sulfur-containing malodorous gas substances in the gas to be treated. In the present application, the sulfur-containing malodorous substances in the gas to be treated are hydrogen sulfide, methyl mercaptan, dimethyl disulfide, respectively, preferably at a concentration of 0.001 to 100ppm, more preferably 100 ppm.
In the present application, the advanced oxidation reaction is performed in a closed reactor. In the present application, the flow rate of the gas to be treated in the reactor is preferably 0.2 to 1.2L/min. The spray density of the mixed solution is preferably 2 to 40ml/min, more preferably 10ml/min. In the advanced oxidation reaction process, the reaction is as follows:
wherein, the reactor is airtight plexiglass, and the reactor includes: the gas inlet is used for introducing gas to be treated; the gas outlet is used for outputting gas after the advanced oxidation reaction; the liquid inlet is used for inputting hydrogen peroxide solution; a liquid outlet for discharging the reacted waste liquid; the air inlet and the air outlet are respectively arranged at two sides of the reactor, and the liquid inlet and the liquid outlet are respectively arranged at the upper end and the lower end of the reactor.
The device for degrading sulfur-containing malodorous gas substances by activating hydrogen peroxide with sodium bicarbonate also comprises a mixed liquid storage tank and a waste liquid tank which are respectively used for storing the mixed liquid before utilization and after recycling. In the application, the ratio of the hydrogen peroxide solution after sodium bicarbonate activation is preferably hydrogen peroxide: the concentration ratio of sodium bicarbonate is 20-2: 1.
the device for activating hydrogen peroxide by sodium bicarbonate is shown in fig. 2, and comprises a gas cylinder 1, a gas pump 4 and a reactor 6 which are sequentially communicated; the reactor is a closed reactor; the front end of the reactor is provided with an air pump 4 for controlling the air flow; the air bottle 1 and the air pump 4 are connected through an air pipe 3; the air pump 4 is connected with the reactor through an air inlet pipe 5; the air pipe 3 is provided with a valve 2; the reactor drain pipe 8 is connected with the waste liquid tank 9; the mixed liquid tank 10 is connected with the reactor 6 through a liquid suction pipe 11, a liquid pump 12 and a liquid inlet pipe 13; the mixed liquid tank is filled with hydrogen peroxide solution activated by sodium bicarbonate; the air outlet pipe 7 is connected with a subsequent detection system and is used for detecting the content of sulfur-containing malodorous gas substances.
According to the degradation method of the sulfur-containing malodorous gas substances, the sulfur-containing malodorous substances are degraded by using a high-grade oxidation technology based on sodium bicarbonate activated hydrogen peroxide, wherein in a NaHCO3-H2O2 system, intermediate products HCO4-, namely primary oxidation of methyl mercaptan and dimethyl disulfide is realized through an oxygen transfer mechanism assisted by a solvent, and superoxide anions (O2-) and OH free radicals generated by H2O2 or HCO 4-decomposition further cause excessive oxidation of the sulfur-containing substances to degrade, so that ammonia can be removed efficiently and at low cost, and the degradation method has wide application range, rapid reaction, low energy consumption, low cost, easy operation and convenient application, and has great application potential in the aspect of odor treatment of sewage treatment plants and kitchen waste treatment plants.
Specifically, the embodiment of the application provides a degradation method of sulfur-containing malodorous gas substances, which comprises the following steps:
s31, preparing sodium bicarbonate and hydrogen peroxide solution with certain concentration: 42g of analytically pure sodium bicarbonate solid is weighed, deionized water is added to dissolve the analytically pure sodium bicarbonate solid to 500mL, and 1mol/L sodium bicarbonate solution is obtained; weighing 40g of analytically pure sodium hydroxide solid, adding deionized water to dissolve the analytically pure sodium hydroxide solid to a constant volume of 1L to obtain 1mol/L sodium hydroxide solution; respectively diluting 1, 1.3, 2, 4 and 10mL of the sodium bicarbonate solution into 2L of deionized water, uniformly stirring, adding a little of sodium hydroxide solution until the pH value of the solution is 10, adding 2mL of 30% hydrogen peroxide solution, stirring for 1h, and uniformly obtaining sodium bicarbonate activated hydrogen peroxide solution (the concentration ratio of hydrogen peroxide to sodium bicarbonate is 20-2:1), wherein the comparative experiment is that 2L of deionized water is singly added with 2mL of 30% hydrogen peroxide solution.
S32, degrading sulfur-containing malodorous gas substances by activating hydrogen peroxide with sodium bicarbonate: the 2L of sodium bicarbonate activated hydrogen peroxide solution (comparative experiment was 2L of deionized water single-added 1mL of 30% hydrogen peroxide solution) obtained above was added to the mixed liquid tank 10, and the flow rate of the liquid pump 12 was adjusted to 10mL/min. Introducing methyl mercaptan into a closed reactor through an air inlet pipeline by adopting a device shown in fig. 2, wherein the concentration of methyl mercaptan is 100ppm, and discharging tail gas into a detection device through an air outlet pipeline for detection; the valve and the air pump are started, the air inlet flow and the air outlet flow are controlled to be 0.8L/min respectively, spraying is carried out according to the period of 1h, the liquid discharge is controlled and regulated for one period of 0.2h, the gas to be treated is contacted with the mixed liquid drop to carry out advanced oxidation reaction, the gas in the absorption device is taken at fixed time intervals to test the methyl mercaptan content, and therefore the methyl mercaptan removal rate is calculated, and the result is shown in figure 3.
As can be seen from FIG. 3, the concentration ratio of hydrogen peroxide to sodium bicarbonate is 20-2 at a methyl mercaptan flow rate of 0.8L/min: under the condition of 1, compared with the effect of single-addition hydrogen peroxide, the removal rate of 100ppm methyl mercaptan is between 20.23 and 34.82 percent, which is superior to the removal rate (4.1 percent) of single-addition hydrogen peroxide. As the sodium bicarbonate concentration ratio increases, the methyl mercaptan removal rate increases.
In another embodiment, S41, a solution of sodium bicarbonate and hydrogen peroxide at a certain concentration is prepared: 42g of analytically pure sodium bicarbonate solid is weighed, deionized water is added to dissolve the analytically pure sodium bicarbonate solid to 500mL, and 1mol/L sodium bicarbonate solution is obtained; weighing 40g of analytically pure sodium hydroxide solid, adding deionized water to dissolve the analytically pure sodium hydroxide solid to a constant volume of 1L to obtain 1mol/L sodium hydroxide solution; respectively diluting 10mL of the sodium bicarbonate solution into 2L of deionized water, uniformly stirring, adding a little sodium hydroxide solution until the pH value of the solution is 10, adding 2mL of 30% hydrogen peroxide solution, stirring for 1h, and obtaining sodium bicarbonate activated hydrogen peroxide solution (the concentration ratio of hydrogen peroxide to sodium bicarbonate is 20-2:1) after uniform stirring, wherein the comparative experiment is that 2L of deionized water is singly added with 2mL of 30% hydrogen peroxide solution.
S42, degrading sulfur-containing malodorous gas substances by activating hydrogen peroxide with sodium bicarbonate: the 2L of sodium bicarbonate activated hydrogen peroxide solution (comparative experiment was 2L of deionized water single-added 1mL of 30% hydrogen peroxide solution) obtained above was added to the mixed liquid tank 10, and the flow rate of the liquid pump 12 was adjusted to 10mL/min. Introducing methyl mercaptan into a closed reactor through an air inlet pipeline by adopting a device shown in the figure 1, wherein the concentration of methyl mercaptan is 100ppm, and discharging tail gas into a detection device through an air outlet pipeline for detection; and (3) starting a valve and an air pump, controlling the inlet flow and the outlet flow to be 0.2L/min, 0.4L/min, 0.6L/min, 0.8L/min, 1 h/min in a period, controlling and adjusting the liquid discharge to be one period in 0.2h, enabling the gas to be treated to contact with the mixed liquid drops for advanced oxidation reaction, taking the gas in the absorption device at fixed time intervals for testing the methyl mercaptan content, and calculating the methyl mercaptan removal rate, wherein the result is shown in figure 4.
As can be seen from FIG. 4, at methyl mercaptan flow rates of 0.2 to 1.2L/min, the hydrogen peroxide to sodium bicarbonate concentration ratio is 2: under the condition of 1, compared with the effect of single-addition hydrogen peroxide, the removal rate of 100ppm methyl mercaptan is between 17.94 and 78.17 percent, which is superior to the removal rate of single-addition hydrogen peroxide (2.16 to 32.87 percent). As the methyl mercaptan flow rate increases, the methyl mercaptan removal rate decreases.
In another embodiment, S51, a sodium bicarbonate and hydrogen peroxide solution of a certain concentration is prepared: weighing 42g of sodium bicarbonate solid of an analytically pure substance, adding deionized water to dissolve the sodium bicarbonate solid to 500mL to obtain 1mol/L sodium bicarbonate solution; weighing 40g of analytically pure sodium hydroxide solid, adding deionized water to dissolve the analytically pure sodium hydroxide solid to a constant volume of 1L to obtain 1mol/L sodium hydroxide solution; respectively diluting 1, 1.3, 2, 4 and 10mL of the sodium bicarbonate solution into 2L of deionized water, uniformly stirring, adding a little of sodium hydroxide solution until the pH value of the solution is 10, adding 2mL of 30% hydrogen peroxide solution, stirring for 1h, and uniformly obtaining sodium bicarbonate activated hydrogen peroxide solution (the concentration ratio of hydrogen peroxide to sodium bicarbonate is 20-2:1), wherein the comparative experiment is that 2L of deionized water is singly added with 2mL of 30% hydrogen peroxide solution.
S52, degrading sulfur-containing malodorous gas substances by activating hydrogen peroxide with sodium bicarbonate: the 2L of sodium bicarbonate activated hydrogen peroxide solution (comparative experiment was 2L of deionized water single-added with 2mL of 30% hydrogen peroxide solution) obtained above was added to the mixed liquid tank 10, and the flow rate of the liquid pump 12 was adjusted to 10mL/min. Introducing dimethyl disulfide into a closed reactor through an air inlet pipeline by adopting a device shown in fig. 2, wherein the concentration of the dimethyl disulfide is 100ppm, and discharging tail gas into a detection device through an air outlet pipeline for detection; and (3) starting a valve and an air pump, controlling the inlet flow and the outlet flow to be 0.2L/min, 0.4L/min, 0.6L/min, 0.8L/min, 1 h/min in a period, controlling and adjusting the liquid discharge to be one period in 0.2h, enabling the gas to be treated to contact with the mixed liquid drops for advanced oxidation reaction, taking the gas in the absorption device at fixed time intervals, testing the content of dimethyl disulfide, and calculating the removal rate of dimethyl disulfide, wherein the result is shown in figure 5.
As can be seen from FIG. 5, the concentration ratio of hydrogen peroxide to sodium bicarbonate is 20-2 at a flow rate of dimethyl disulfide of 0.8L/min: under the condition of 1, compared with the effect of single-addition hydrogen peroxide, the removal rate of 100ppm dimethyl disulfide is 68.97-81.47 percent, which is superior to the removal rate of single-addition hydrogen peroxide (51.61 percent). As the sodium bicarbonate concentration ratio increases, the dimethyl disulfide removal rate increases.
Specifically, in another embodiment, S61, a sodium bicarbonate and hydrogen peroxide solution of a certain concentration is prepared: weighing 42g of sodium bicarbonate solid of an analytically pure substance, adding deionized water to dissolve the sodium bicarbonate solid to 500mL to obtain 1mol/L sodium bicarbonate solution; weighing 40g of analytically pure sodium hydroxide solid, adding deionized water to dissolve the analytically pure sodium hydroxide solid to a constant volume of 1L to obtain 1mol/L sodium hydroxide solution; respectively diluting 10mL of the sodium bicarbonate solution into 2L of deionized water, uniformly stirring, adding a little sodium hydroxide solution until the pH value of the solution is 10, adding 2mL of 30% hydrogen peroxide solution, stirring for 1h, and obtaining sodium bicarbonate activated hydrogen peroxide solution (the concentration ratio of hydrogen peroxide to sodium bicarbonate is 20-2:1) after uniform stirring, wherein the comparative experiment is that 2L of deionized water is singly added with 2mL of 30% hydrogen peroxide solution.
S62, degrading sulfur-containing malodorous gas substances by activating hydrogen peroxide with sodium bicarbonate: the 2L of sodium bicarbonate activated hydrogen peroxide solution (comparative experiment was 2L of deionized water single-added with 2mL of 30% hydrogen peroxide solution) obtained above was added to the mixed liquid tank 10, and the flow rate of the liquid pump 12 was adjusted to 10mL/min. Introducing dimethyl disulfide into a closed reactor through an air inlet pipeline by adopting a device shown in fig. 2, wherein the concentration of the dimethyl disulfide is 100ppm, and discharging tail gas into a detection device through an air outlet pipeline for detection; and (3) starting a valve and an air pump, controlling the inlet flow and the outlet flow to be 0.2L/min, 0.4L/min, 0.6L/min, 0.8L/min, 1 h/min in a period, controlling and adjusting the liquid discharge to be one period in 0.2h, enabling the gas to be treated to contact with the mixed liquid drops for advanced oxidation reaction, taking the gas in the absorption device at fixed time intervals, testing the content of dimethyl disulfide, and calculating the removal rate of dimethyl disulfide, wherein the result is shown in figure 6.
As can be seen from FIG. 6, the concentration ratio of hydrogen peroxide to sodium bicarbonate is 2 when the flow rate of dimethyl disulfide is 0.2-1.2L/min: under the condition of 1, compared with the effect of single-addition hydrogen peroxide, the removal rate of 100ppm dimethyl disulfide is between 60.84 and 95.77 percent, which is superior to the removal rate of single-addition hydrogen peroxide (34.37 to 88.87 percent). As the dimethyl disulfide flow rate increases, the dimethyl disulfide removal rate decreases.
Specifically, in another embodiment, S71, a sodium bicarbonate and hydrogen peroxide solution of a certain concentration is prepared: weighing 42g of sodium bicarbonate solid of an analytically pure substance, adding deionized water to dissolve the sodium bicarbonate solid to 500mL to obtain 1mol/L sodium bicarbonate solution; weighing 40g of analytically pure sodium hydroxide solid, adding deionized water to dissolve the analytically pure sodium hydroxide solid to a constant volume of 1L to obtain 1mol/L sodium hydroxide solution; 2mL of the sodium bicarbonate solution is diluted into 2L of deionized water, after being uniformly stirred, the sodium hydroxide solution is added until the pH value of the solution is 10, 2mL of 30% hydrogen peroxide solution is added, and after being uniformly stirred for 1h, the sodium bicarbonate activated hydrogen peroxide solution (the concentration ratio of hydrogen peroxide to sodium bicarbonate is 10:1) is obtained, wherein the comparative experiment is that 2L of deionized water is singly added with 2mL of 30% hydrogen peroxide solution.
S72, degrading sulfur-containing malodorous gas substances by activating hydrogen peroxide with sodium bicarbonate: the 2L of sodium bicarbonate activated hydrogen peroxide solution (comparative experiment was 2L of deionized water single-added with 2mL of 30% hydrogen peroxide solution) obtained above was added to the mixed liquid tank 10, and the flow rate of the liquid pump 12 was adjusted to 10mL/min. Introducing hydrogen sulfide into a closed reactor through an air inlet pipeline by adopting a device shown in fig. 2, wherein the concentration of the hydrogen sulfide is 100ppm, and discharging tail gas into a detection device through an air outlet pipeline for detection; the valve and the air pump are started, the air inlet flow and the air outlet flow are controlled to be 0.2L/min, 0.4L/min, 0.6L/min, 1.0L/min and 1 h/min in a period, the liquid discharge is controlled and regulated for one period, the gas to be treated is contacted with the mixed liquid drop to perform advanced oxidation reaction, the gas in the absorption device is taken at fixed time intervals to test the content of hydrogen sulfide, and the removal rate of the hydrogen sulfide is calculated, and the result is shown in figure 7.
As can be seen from FIG. 7, at a hydrogen sulfide gas flow rate of 0.2-1.2L/min, the hydrogen sulfide removal rate of 100ppm was between 6.89 and 35.73% for hydrogen peroxide alone, and between 18.54 and 86.04% for hydrogen peroxide activated by sodium bicarbonate, the latter removal effect was significantly better than the former. As the flow rate increases, the hydrogen sulfide removal rate decreases.
The present embodiment provides a degradation device for sulfur-containing malodorous gas substances, and as used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
The application discloses a degradation device for sulfur-containing malodorous gas substances, as shown in fig. 8, comprising:
the first processing module 01 is used for obtaining a mixed solution with preset concentration;
a second treatment module 02 for pouring the mixed solution from above the reactor;
and the third treatment module 03 is used for introducing the gas to be treated into the lower part of the reactor, mixing the mixed solution with the gas to be treated so as to degrade sulfur-containing malodorous gas substances in the gas to be treated and output oxidation reaction gas.
The degradation device for sulfur-containing malodorous gas substances provided by the embodiment of the application utilizes the advanced oxidation technology to degrade the sulfur-containing malodorous substances based on the sodium bicarbonate activated hydrogen peroxide, wherein in a NaHCO3-H2O2 system, intermediate products HCO4-, namely primary oxidation of methyl mercaptan and dimethyl disulfide is realized through a solvent-assisted oxygen transfer mechanism, and superoxide anions (O2-) and OH free radicals generated by H2O2 or HCO 4-decomposition further cause excessive oxidation of sulfur-containing substances to degrade, so that ammonia can be removed efficiently and at low cost, and the degradation device has wide application range, rapid reaction, low energy consumption, low cost, easy operation and convenient application and great application potential in the aspect of odor treatment of sewage treatment plants and kitchen waste treatment plants.
An embodiment of the present application further provides an electronic device, referring to fig. 9, fig. 9 is a schematic structural diagram of an electronic device provided in an alternative embodiment of the present application, and as shown in fig. 9, the electronic device may include: at least one processor 601, such as a CPU (Central Processing Unit ), at least one communication interface 603, a memory 604, at least one communication bus 602. Wherein the communication bus 602 is used to enable connected communications between these components. The communication interface 603 may include a Display screen (Display), a Keyboard (Keyboard), and the selectable communication interface 603 may further include a standard wired interface, and a wireless interface. The memory 604 may be a high-speed RAM memory (RandomAccess Memory, volatile random access memory) or a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 604 may also optionally be at least one storage device located remotely from the processor 601. Where the processor 601 may store an application program in the memory 604 in the apparatus described in connection with fig. 9, and the processor 601 invokes the program code stored in the memory 604 for performing any of the method steps described above.
The communication bus 602 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus, among others. The communication bus 602 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in fig. 9, but not only one bus or one type of bus.
Wherein the memory 604 may comprise volatile memory (english) such as random-access memory (RAM); the memory may also include a nonvolatile memory (english: non-volatile memory), such as a flash memory (english: flash memory), a hard disk (english: hard disk drive, abbreviated as HDD) or a solid state disk (english: solid-state drive, abbreviated as SSD); memory 604 may also include a combination of the types of memory described above.
The processor 601 may be a central processor (English: central processing unit, abbreviated: CPU), a network processor (English: network processor, abbreviated: NP) or a combination of CPU and NP.
The processor 601 may further comprise a hardware chip, among other things. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof (English: programmable logic device). The PLD may be a complex programmable logic device (English: complex programmable logic device, abbreviated: CPLD), a field programmable gate array (English: field-programmable gate array, abbreviated: FPGA), a general-purpose array logic (English: generic array logic, abbreviated: GAL), or any combination thereof.
Optionally, the memory 604 is also used for storing program instructions. The processor 601 may call program instructions to implement the method for degrading sulfur-containing malodorous gas species as shown in the illustrated embodiment of the present application.
The embodiment of the application also provides a non-transitory computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the degradation method of the sulfur-containing malodorous gas substances in any method embodiment. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (RandomAccess Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
Although embodiments of the present application have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the application, and such modifications and variations fall within the scope of the application as defined by the appended claims.
Claims (9)
1. A method for degrading sulfur-containing malodorous gas species, comprising:
obtaining a mixed solution with preset concentration;
pouring the mixed solution from above the reactor;
and introducing the gas to be treated into the lower part of the reactor, mixing the mixed solution with the gas to be treated so as to degrade sulfur-containing malodorous gas substances in the gas to be treated and output oxidation reaction gas.
2. The method of claim 1, wherein the obtaining a mixed solution of a predetermined concentration comprises:
taking a first preset weight of analytically pure sodium bicarbonate solid;
dissolving the sodium bicarbonate solid in deionized water with a second preset weight;
and adding a sodium hydroxide solution into the deionized water to regulate the pH, and then mixing a hydrogen peroxide solution and stirring to obtain the mixed solution.
3. The method of claim 2, wherein the step of determining the position of the substrate comprises,
the hydrogen peroxide solution is 30% hydrogen peroxide solution;
the stirring time of the mixed solution is 10 minutes;
the concentration of the sodium hydroxide solution is 1mol/L.
4. The method of claim 1, wherein said pouring the mixed solution from above the reactor comprises: spraying was introduced from above the reactor by means of a pump.
5. The method of claim 1, wherein said passing the gas to be treated to the lower part of the reactor comprises: the flow rate of the gas to be treated in the reactor is 0.2-1.2L/min.
6. The method of claim 2, wherein the reactor is a closed plexiglass, the reactor comprising:
the gas inlet is used for introducing gas to be treated;
the gas outlet is used for outputting the gas after the advanced oxidation reaction;
a liquid inlet for inputting the hydrogen peroxide solution;
a liquid outlet for discharging the reacted waste liquid;
the air inlet and the air outlet are respectively arranged at two sides of the reactor, and the liquid inlet and the liquid outlet are respectively arranged at the upper end and the lower end of the reactor.
7. A sulfur-containing malodorous gas species degradation device comprising:
the first processing module is used for obtaining a mixed solution with preset concentration;
a second treatment module for pouring the mixed solution from above the reactor;
and the third treatment module is used for introducing the gas to be treated into the lower part of the reactor, mixing the mixed solution with the gas to be treated so as to degrade sulfur-containing malodorous gas substances in the gas to be treated and output oxidation reaction gas.
8. An electronic device, comprising:
the device comprises a memory and a processor, wherein the memory and the processor are in communication connection, the memory stores computer instructions, and the processor executes the computer instructions, so that the degradation method of the sulfur-containing malodorous gas substances is executed by the processor.
9. A computer-readable storage medium storing computer instructions for causing a computer to perform the method of degrading sulfur-containing malodorous gas species of any one of claims 1 to 6.
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