CN114751501A - Environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment - Google Patents
Environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment Download PDFInfo
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- CN114751501A CN114751501A CN202210389945.1A CN202210389945A CN114751501A CN 114751501 A CN114751501 A CN 114751501A CN 202210389945 A CN202210389945 A CN 202210389945A CN 114751501 A CN114751501 A CN 114751501A
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- 239000002912 waste gas Substances 0.000 title claims abstract description 54
- 238000004043 dyeing Methods 0.000 title claims abstract description 16
- 238000007639 printing Methods 0.000 title claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 100
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 36
- 239000002699 waste material Substances 0.000 claims abstract description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002253 acid Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910001868 water Inorganic materials 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 230000004888 barrier function Effects 0.000 claims abstract description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 7
- 238000000889 atomisation Methods 0.000 claims abstract description 5
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000000746 purification Methods 0.000 claims description 25
- 239000002351 wastewater Substances 0.000 claims description 16
- 238000009689 gas atomisation Methods 0.000 claims description 13
- 239000012295 chemical reaction liquid Substances 0.000 claims description 12
- SSBRSHIQIANGKS-UHFFFAOYSA-N [amino(hydroxy)methylidene]azanium;hydrogen sulfate Chemical compound NC(N)=O.OS(O)(=O)=O SSBRSHIQIANGKS-UHFFFAOYSA-N 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 6
- 239000003595 mist Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 10
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 10
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 abstract description 6
- 239000012495 reaction gas Substances 0.000 abstract description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 9
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 208000021302 gastroesophageal reflux disease Diseases 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229960003753 nitric oxide Drugs 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
-
- 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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/166—Nitrites
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment, which comprises a gas circulation component, wherein the gas circulation component comprises a first gas discharge conduit and a second conduit which discharges untreated and complete waste gas, a notch is formed in the top end of a waste water treatment tank, the bottom of the first conduit is open and is used for receiving gas, one end of the second conduit is communicated between a sponge layer and a gas barrier layer of the waste water treatment tank so as to discharge untreated and complete waste gas and further carry out atomization treatment, and a gas path component is arranged between the first conduit and the second conduit. According to the invention, nitric acid and nitrous acid in the waste acid are reduced into clean nitrogen, carbon dioxide and water, so that denitration operation is realized, the cost is lower, and the treatment is more efficient; meanwhile, the wet sponge layer and the gas barrier layer are adopted to retard and retard the waste acid gas, and a gas circulation component is matched, so that waste gas carried by the reaction device before reaction and waste gas and waste liquid which are not completely treated in the reaction process are subjected to circulation treatment until the waste gas reaches the discharge standard.
Description
Technical Field
The invention relates to the technical field of waste gas treatment equipment, in particular to an environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment.
Background
The waste liquid discharged by the printing and dyeing industry generally contains nitric acid waste liquid, soda ash and lime nitrate solution are generally added during treatment to generate neutral nitrate solution, the neutral nitrate solution is diluted by water, the pH value is reduced to 5 and 8, and the neutral nitrate solution can be discharged according to the conventional waste liquid after nitrogen elements are removed to reach the national standard.
The existing industrial method for removing nitric acid and nitrous acid from waste acid mainly comprises the steps of reacting with water, controlling the concentration of sulfuric acid to be below 70% during treatment, and heating to be above 120 ℃ to decompose nitric acid and nitrous acid in the waste acid into NOX，NOXThe tail gas is treated by methods such as SCR, SNCR and the like, and the content of nitric acid and nitrous acid in the sulfuric acid after denitration is about 1 percent. The method has the defects of high reaction temperature, easy generation of secondary pollution, low removal rate and the like, and in SNCR treatment, the denitration temperature is 850-1100 ℃, and NO is removedXThe removal rate is about 50%. The SCR treatment needs to use a catalyst, the denitration temperature is 280-420 ℃, and NO is generated XThe removal rate is about 80%. The investment cost and the operation cost of the two are high, and yellow smoke is not generated in tail gas treatment thoroughly so as to solve the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects in the prior art, the invention provides an environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment, which solves the problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: an environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment comprises a waste water treatment box, wherein one side of the bottom of the waste water treatment box is communicated with a waste water discharge pipe, the other side of the waste water treatment box is provided with a liquid discharge port, a guide pipe for introducing reaction liquid is arranged above the waste water temporary storage opposite side in the waste water treatment box, a wet sponge layer and a gas barrier layer are arranged above the guide pipe so as to retard and block waste acid gas, a plurality of water pipes are arranged between the sponge layer and the gas barrier layer and pump a water source from the outside, a plurality of water mist spray nozzles distributed circumferentially are arranged on the water pipes, the environment-friendly post-treatment device also comprises a gas circulation component, the gas circulation component comprises a first gas discharge guide pipe and a second gas discharge pipe for discharging untreated complete waste gas, the top end of the waste water treatment box is provided with a notch, the bottom of the first gas guide pipe is opened and used for receiving gas, one end of the second gas guide pipe is communicated between the sponge layer and the gas barrier layer of the waste water treatment box so as to discharge untreated complete waste gas and further carry out atomization treatment, an air path component is arranged between the first guide pipe and the second guide pipe.
Preferably, the bottom of the wastewater tank is provided with an inclined wall surface, the tops of the wall surfaces at two sides are provided with through grooves for placing the guide pipes for the reaction liquid, and through holes are arranged at intervals at the horizontal inner side of the guide pipes for allowing the reaction liquid to flow into the inclined wall surface at intervals.
Preferably, the gas barrier layer comprises a baffle plate, wherein a vent groove is arranged on the baffle plate in an array manner, a gas input frame is arranged above the baffle plate, and gas input blocking is performed, two sides of the baffle plate are obliquely arranged downwards, and the input port of the gas input frame is just attached to two side surfaces of the baffle plate so as to output gas obliquely downwards.
Preferably, the gas circuit component includes the waste gas atomization case, the purifying box two that communicate in proper order along the waste gas discharge direction, and wherein the waste acid gas that the waste gas atomization case is not fully atomized further atomizes, and the waste acid after the atomizing flows into purifying box two, and gas also discharges into purifying box two.
Preferably, set up interim gaseous storage ball on the gas circuit between waste water treatment case and the waste gas atomization case to the realization is not in time done the buffer memory at follow-up gas.
Preferably, an air blower is arranged on a gas path between the waste gas atomization box and the second purification box.
Preferably, a first purification box is further arranged on one side of the wastewater treatment box, the reaction solution is dripped into the first purification box without breaking the bottom of the first purification box, the first purification box is communicated with a liquid discharge pipe of the wastewater treatment box through a communication pipe, a liquid discharge valve d1 and a liquid discharge valve d2 are respectively arranged on the liquid discharge pipe and the communication pipe, a detector for detecting nitrogen elements is arranged at the liquid outlet of the liquid discharge pipe, when the concentration is detected to be higher than the discharge standard, the liquid discharge valve d1 is closed, the liquid discharge valve d2 is opened, the waste liquid is discharged into the first purification box for further treatment, the introduced dosage of the reaction solution in the wastewater treatment box is increased, and the retention time of the wastewater is prolonged.
Preferably, the reaction liquid is urea sulfate solution to reduce the nitrified waste acid into clean nitrogen, carbon dioxide and water.
(III) advantageous effects
After adopting the technical scheme, compared with the prior art, the invention has the following advantages: according to the invention, the urea sulfate solution is adopted to react with the nitric acid in the wastewater, and the nitric acid and the nitrous acid in the waste acid are reduced into clean nitrogen, carbon dioxide and water, so that the denitration operation is realized, the cost is lower, and the treatment is more efficient; meanwhile, the wet sponge layer and the gas barrier layer are adopted to retard and retard waste acid gas, and the waste gas discharged is repeatedly replaced by matching with a gas circulation component, so that the waste gas is more fully treated to reach the standard discharge; and secondly, a gas circulating component is arranged, so that waste gas carried by the reactor before reaction and waste gas and waste liquid which are not completely treated in the reaction process are subjected to circulating treatment until the waste gas reaches the discharge standard.
Drawings
FIG. 1 is a schematic view of a combination of post-treatment processes according to the present invention;
FIG. 2 is a schematic view of an improved post-treatment process assembly according to the present invention;
FIG. 3 is a schematic view of a gas storage sphere according to the present invention;
FIG. 4 is a schematic cross-sectional view of a wastewater treatment tank according to the present invention;
FIG. 5 is a side view in cross section of a wastewater treatment tank according to the invention;
FIG. 6 is a schematic side view of a wastewater treatment tank according to the present invention.
In the figure: 1. a wastewater treatment tank; 2. a waste water discharge pipe; 3. a liquid discharge port; 4. a liquid introduction tube; 5. a wall surface; 6. a through groove; 7. a conduit; 8. a gas circulation member; 81. a first conduit; 82. a second conduit; 83. a gas path member; 9. a gas barrier layer; 91. a baffle plate; 92. a vent channel; 93. a gas input frame; 10. a sponge layer; 11. a water pipe; 12. a through hole; 12. an exhaust gas atomization box; 13. a second purifying box; 14. a gas storage ball; 15. a blower; 16. a first purifying box; 17. a nitrogen cylinder.
A is an air inlet valve a 1;
b, an air inlet valve B1; an exhaust valve b 2; an exhaust valve b 3;
c, a drain valve C1;
d: a drain valve d 1; a drain valve d 2; a drain valve d 3;
Detailed Description
The invention is explained in more detail below with reference to the figures and examples.
As shown in fig. 4-6: the utility model provides an environment-friendly aftertreatment device suitable for printing and dyeing exhaust-gas treatment, includes waste water treatment case 1, and one side of its bottom leads to there is waste water to emit into pipe 2, and the opposite side is equipped with leakage fluid dram 3, and waste water in waste water treatment case 1 keeps in relative top and arranges pipe 7 that lets in reaction liquid, and this scheme adopts the urea sulfate solution to carry out the nitric acid reaction with in the waste water, is reduced into clear nitrogen gas, carbon dioxide and water with nitric acid and nitrous acid in the spent acid, realizes the denitration operation. Wherein the reaction temperature is 40-100 ℃, after the dropwise addition is finished, the reaction is finished, and the temperature is reduced to room temperature.
Wherein the bottom of the wastewater treatment tank 1 is provided with an inclined wall surface 5, and the tops of the wall surfaces 5 at the two sides are provided with a through groove 6 for placing a conduit 7 for introducing reaction liquid. Wherein, through holes 12 are arranged at intervals on the horizontal inner side of the conduit 7 for discharging reaction liquid at intervals, and the reaction liquid can flow in the inclined wall surface 5, the contact area is large, and the reaction is more sufficient.
Since nitric acid is an extremely volatile acid, the waste gas generated in waste acid treatment contains a large amount of nitrogen dioxide (the nitrogen monoxide is mixed with free radicals, so that the nitrogen dioxide is active in chemical property and can be converted into corrosive gas nitrogen dioxide after the gas reacts with oxygen), and therefore the waste gas cannot be directly discharged and needs to be treated. Generally, the water mist which can contact with the reaction chamber in a large area can be used for converting the water mist into dilute acid, and the dilute acid can slowly flow back to the reaction chamber at the bottom. However, the gas leaks upwards and therefore needs to be retarded to allow it to remain for a longer period of time for the reaction.
The scheme can temporarily store the liquid for a certain time before the reaction, and the waste gas is atomized to form waste acid reflux.
The wet sponge layer 10 and the gas barrier layer 9 are adopted to retard and block waste acid gas, so that waste gas is more fully treated to reach the standard discharge.
Specifically, the gas barrier layer 9 includes a baffle 91, a vent groove 92 is arrayed on the baffle 91, a gas input frame 93 is arranged above the baffle 91, and gas input blocking is performed (mainly using external input nitrogen, and a nitrogen bottle 17 capable of introducing nitrogen is arranged on one side). Wherein, two sides of the baffle plate 91 are obliquely arranged downwards, and the input port of the gas input frame 93 is just attached to two side surfaces of the baffle plate 91 so as to obliquely output gas downwards, thereby effectively prolonging the rising and discharging time of waste gas. It should be noted that the flow rate and flow rate of the input gas cannot be too large, and the gas generated by the reaction (such as carbon dioxide gas) cannot be exhausted.
Referring to fig. 1, the gas circulation member 8 is further provided, and comprises a first exhaust gas conduit 81, a second conduit 82 for exhausting untreated and completely exhausted gas, and a gas path member 83 is arranged between the first conduit 81 and the second conduit 82. The top end of the wastewater treatment box 1 is provided with a notch, the bottom of the first guide pipe 81 is opened for receiving gas, and one end of the second guide pipe 82 is communicated between the sponge layer 10 and the gas barrier layer 9 of the wastewater treatment box 1 so as to discharge untreated waste gas and further carry out atomization treatment.
The gas path component 83 comprises a waste gas atomization box 12 and a purification box II 13 which are sequentially communicated along the waste gas discharge direction, wherein the waste gas atomization box 12 further atomizes waste acid gas which is not sufficiently atomized in a short time, the atomized waste acid gas flows into the purification box II 13, and the gas is also discharged into the purification box II 13. And a detector for detecting nitrogen dioxide gas is arranged on the second purification box 13, after the nitrogen dioxide gas is not detected or the concentration is detected to reach the emission standard, the control valve b2 is opened, if the nitrogen dioxide gas does not reach the emission standard, the exhaust valve b3 is opened, and the nitrogen dioxide gas is introduced between the sponge layer 10 and the gas barrier layer 9 of the wastewater treatment box 1 again through the pipeline to realize further atomization so as to ensure that the emission of the waste gas reaches the standard.
Referring to the attached figures 2-3, furthermore, the gas in the scheme is not only acid gas to be treated, but also nitrogen introduced from the outside, and nitrogen and carbon dioxide are generated in the reaction of waste water, so that the gas quantity in the device is large. Therefore, the temporary gas storage ball 14 (made of fire balloon cloth and having the functions of sealing, air tightness, moisture isolation, strong toughness, free expansion, gas storage and the like) is arranged on the gas path between the wastewater treatment tank 1 and the waste gas atomization tank 12, so that the buffer storage of the subsequent gas is not performed in time. Secondly, set up air-blower 15 on the gas circuit between waste gas atomization case 12 and second purifying box 13 for discharge to second purifying box 13 department is accelerated through atomizing gaseous, and then increase efficiency, then avoid appearing the gas circuit explosion problem.
Secondly, sponge layer 10 also adopts the slope setting, can play the effect of direction to waste gas for waste gas rises along inclination, and the time that the extension waste gas rises is longer. It should be noted that the side of the sponge layer 10 is provided with a notch to facilitate the backflow of the atomized waste acid.
A plurality of water pipes 11 are arranged between the sponge layer 10 and the air blocking layer 9, water sources are pumped from the outside, and a plurality of water mist nozzles distributed circumferentially are arranged on the water pipes 11, so that the waste gas in the space can be contacted in an all-around manner.
Furthermore, still be provided with purifying box 16 on waste water treatment case 1 one side, the urea sulfate solution is dripped into to continuous bottom of the case portion in purifying box 16 for the acid pickle that the concentration is lower that gets into is further handled. The first purification box 16 is communicated with a liquid discharge pipe of the wastewater treatment box 1 through a communication pipe, a liquid discharge valve d1 and a liquid discharge valve d2 are respectively arranged at the liquid discharge pipe and the communication pipe, a detector for detecting nitrogen elements is arranged at a liquid outlet of the liquid discharge pipe, when the detected concentration is higher than a discharge standard, the liquid discharge valve d1 is closed, the liquid discharge valve d2 is opened to discharge the waste liquid into the first purification box 16 for further treatment, the introduction dosage of the urea sulfate solution in the wastewater treatment box 1 is increased, and the retention time of the wastewater is prolonged.
The top of the first purification box 16 is communicated to the bottom end of the side wall of the sponge layer 10 through a guide pipe 7, and a liquid discharge valve c1 is arranged on the guide pipe 7, so that the atomized nitrogen dioxide gas gradually flows into the first purification box 16 for treatment, and meanwhile, the acid liquid in the second purification box 13 is also discharged into the first purification box 16 and is discharged through a liquid discharge valve d3 after the treatment reaches the wastewater discharge standard.
The above embodiments are intended to teach that various changes and modifications may be made by persons skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the description, and the protection scope must be determined by the scope of the claims.
Claims (8)
1. The utility model provides an environment-friendly post-treatment device suitable for printing and dyeing exhaust-gas treatment which characterized in that: comprises a wastewater treatment box, one side of the bottom of the wastewater treatment box is communicated with a wastewater discharge pipe, the other side of the bottom of the wastewater treatment box is provided with a fluid outlet, a conduit for introducing reaction liquid is arranged above the temporary wastewater storage in the wastewater treatment box, a wet sponge layer and an air barrier layer are arranged above the conduit, so as to retard and retard waste acid gas, a plurality of water pipes are arranged between the sponge layer and the gas barrier layer, water sources are pumped from the outside, a plurality of water mist spray heads which are distributed circumferentially are arranged on the water pipes, and the waste acid gas retarder also comprises a gas circulation component, which comprises a first exhaust gas conduit and a second conduit which exhausts untreated waste gas, wherein the top end of a waste water treatment box is provided with a notch, the bottom of the first conduit is open, one end of the second guide pipe is communicated between the sponge layer and the air barrier layer of the wastewater treatment box, so as to discharge the waste gas which is not completely treated and further carry out atomization treatment, and a gas path component is arranged between the first guide pipe and the second guide pipe.
2. The environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment as set forth in claim 1, wherein: the bottom of the wastewater tank is provided with an inclined wall surface, the tops of the wall surfaces at two sides are provided with through grooves for placing guide pipes for introducing reaction liquid, and through holes are arranged at intervals on the horizontal inner side of each guide pipe for introducing the reaction liquid from the inclined wall surface at intervals.
3. The environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment as set forth in claim 1, wherein: the gas barrier layer comprises a baffle plate, a vent groove is arrayed on the baffle plate, a gas input frame is arranged above the baffle plate, gas input blocking is carried out, two sides of the baffle plate are obliquely arranged downwards, and an input port of the gas input frame is just attached to two side faces of the baffle plate so as to output gas obliquely downwards.
4. The environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment as set forth in claim 1, wherein: the gas circuit component comprises a waste gas atomization box and a purification box II which are sequentially communicated along the waste gas discharge direction, wherein waste acid gas which is not sufficiently atomized by the waste gas atomization box is further atomized, the atomized waste acid flows into the purification box II, and the gas is also discharged into the purification box II.
5. The environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment as recited in claim 4, wherein: temporary gas storage balls are arranged on a gas path between the wastewater treatment box and the waste gas atomization box, so that buffer storage of subsequent gas is not timely achieved.
6. The environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment as recited in claim 4, wherein: and an air blower is arranged on the air path between the waste gas atomization box and the second purification box.
7. The environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment as set forth in claim 1, wherein: the device is characterized in that a first purification box is further arranged on one side of the wastewater treatment box, a reaction solution is dripped into the first purification box without breaking the bottom of the first purification box, the first purification box is communicated with a liquid discharge pipe of the wastewater treatment box through a communication pipe, a liquid discharge valve d1 and a liquid discharge valve d2 are respectively arranged on the liquid discharge pipe and the communication pipe, a detector for detecting nitrogen elements is arranged at a liquid outlet of the liquid discharge pipe, when the detected concentration is higher than the discharge standard, the liquid discharge valve d1 is closed, the liquid discharge valve d2 is opened to discharge the waste liquid into the first purification box for further treatment, the introduced dosage of the reaction solution in the wastewater treatment box is increased, and the retention time of the wastewater is prolonged.
8. The environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment as set forth in claim 1, wherein: the reaction liquid adopts a urea sulfate solution to reduce the nitrified waste acid into clean nitrogen, carbon dioxide and water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210389945.1A CN114751501B (en) | 2022-04-14 | 2022-04-14 | Environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210389945.1A CN114751501B (en) | 2022-04-14 | 2022-04-14 | Environment-friendly post-treatment device suitable for printing and dyeing waste gas treatment |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108033536A (en) * | 2017-12-07 | 2018-05-15 | 江苏丰山集团股份有限公司 | A kind of method of denitration of nitrating wasting acid |
| CN209108909U (en) * | 2018-11-16 | 2019-07-16 | 浙江德欧化工制造有限公司 | A kind of emission-control equipment for nitrating wasting acid processing |
| CN110975508A (en) * | 2019-12-19 | 2020-04-10 | 徐州鸿誉环境科技有限公司 | Environment-friendly industrial waste gas treatment device |
| CN113769575A (en) * | 2021-09-01 | 2021-12-10 | 江苏省同济科技有限公司 | Waste gas purification environment-friendly device |
| CN114100303A (en) * | 2021-10-08 | 2022-03-01 | 安徽京仪自动化装备技术有限公司 | Air inlet system for semiconductor waste gas treatment and control method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108033536A (en) * | 2017-12-07 | 2018-05-15 | 江苏丰山集团股份有限公司 | A kind of method of denitration of nitrating wasting acid |
| CN209108909U (en) * | 2018-11-16 | 2019-07-16 | 浙江德欧化工制造有限公司 | A kind of emission-control equipment for nitrating wasting acid processing |
| CN110975508A (en) * | 2019-12-19 | 2020-04-10 | 徐州鸿誉环境科技有限公司 | Environment-friendly industrial waste gas treatment device |
| CN113769575A (en) * | 2021-09-01 | 2021-12-10 | 江苏省同济科技有限公司 | Waste gas purification environment-friendly device |
| CN114100303A (en) * | 2021-10-08 | 2022-03-01 | 安徽京仪自动化装备技术有限公司 | Air inlet system for semiconductor waste gas treatment and control method |
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Denomination of invention: An environmentally friendly post-treatment device suitable for the treatment of printing and dyeing waste gas Granted publication date: 20230630 Pledgee: Zhejiang Shaoxing Ruifeng Rural Commercial Bank Co.,Ltd. Binhai sub branch Pledgor: ZHEJIANG DEOU CHEMICAL MANUFACTURING Co.,Ltd. Registration number: Y2024980029787 |
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