CN103691286A - Method and device for pretreating waste gas generated by printing and dyeing wastewater - Google Patents
Method and device for pretreating waste gas generated by printing and dyeing wastewater Download PDFInfo
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- CN103691286A CN103691286A CN201310725309.2A CN201310725309A CN103691286A CN 103691286 A CN103691286 A CN 103691286A CN 201310725309 A CN201310725309 A CN 201310725309A CN 103691286 A CN103691286 A CN 103691286A
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Abstract
The invention belongs to the technical field of waste gas treatment and particularly relates to a method for pretreating waste gas generated by printing and dyeing wastewater. The method comprises the following steps that: after the waste gas enters an adsorption tower, adsorption liquid is uniformly sprayed on the surface of stuffing from a spray nozzle to keep wet; simultaneously, the waste gas is in contact with the adsorption liquid on the surface of the sufficiently wet stuffing and under the action of physical and chemical adsorption, an aerosol pollutant in the waste gas is adsorbed into washing liquid; and the adsorption liquid is conveyed to the spray nozzle from a solution box by a circulating pump, the percolating adsorption liquid reflows to the solution box, a liquid storage tank is arranged, combination control is carried out by a metering pump and a pH controller, the metering pump continuously pumps concentrated solution into the solution box from the liquid storage tank so as to keep concentration of the adsorption liquid stable. When the method disclosed by the invention is adopted to treat the waste gas generated by the wastewater in the printing and dyeing process, by removing dust in odor and preventing the dust from entering a subsequent biotrickling filter to cause increase of a pressure drop, increase of operating cost and even failure of operation are avoided.
Description
Technical field
The invention belongs to technical field of waste gas treatment, be specifically related to a kind of pretreated method of waste gas that dyeing waste water produces, also relate to the device of the method special use.
background technology
Along with improving constantly of China's economic level, foul smell is processed an important environmental protection investments project that has become China environmental protection field.Due to foul gas high volatility, easily diffusion, penetrating odor is large, may have a negative impact to people's respiratory system, digestive system, internal system, nervous system and spirit, so foul smell is processed and had huge social value.
The foul smell that foul smell normally produces in the technical process such as it heats, decomposes, synthesizes due to compounds such as sulfur-bearing, nitrogen.Low concentration foul smell is to cause psychological pressure to people's main harm because these nifves can cause apocleisis, breathe feel suffocated, feel sick, the phenomenon such as vomiting.Yet the foul smell of some high concentration, if hydrogen sulfide is hypertoxic foul smell, has life harm.
Its common processing method is as follows:
Combustion method: by the degrade method of flammable odorant of strong oxidation reaction; Be applicable to the processing of the flammable odorant of high concentration, little tolerance, feature is that decomposition efficiency is high, but install perishable, consume fuel, cost is high, in processing, may generate secondary pollution;
Oxidizing process: utilize the method for oxidant oxidation odorant, in being applicable to, the processing of low concentration foul gas, treatment effeciency is high, but needs oxidant, and disposal cost is high;
Absorption process: with the odorant in solvent absorption foul smell, make the method for gas sweetening, be applicable to the foul gas of height, middle concentration, process flow large, technical maturity, but treatment effeciency is not high, consumes absorbent, and pollutant is only transferred to liquid phase by gas phase;
Absorption method: utilize odorant in adsorbent Adsorption foul gas, be applicable to low concentration, the high foul gas requiring that purifies, can process multi-component foul gas, treatment effeciency;
Neutralisation: the method that weakens stench sense organ intensity in use with deodorant, be applicable to immediately, temporarily to eliminate the occasion of low concentration foul gas impact, can eliminate fast the impact of stench, flexibility is large, but foul gas material is not removed, and need add nertralizer;
Bioanalysis: utilize microbial degradation odorant and make the method for gas sweetening, being applicable to the removal of biodegradable water-soluble odorant, removal efficiency is high, and treating apparatus is simple, and processing cost is cheap, and operation maintenance is easy, can avoid secondary pollution.
Above-mentioned method is processed and is respectively had pluses and minuses for foul gas, select any processing method more suitable actually, to determine according to material elementses such as the hygienic requirements of the character of odorant, concentration, treating capacity, locality and economic conditions, also often several method is combined with in practice.
In sewage disposal, contain a large amount of pollutants, in the process of processing at anaerobic pond, wax flotation tank etc., by naturally volatilizing and aeration stripping, enter into gas phase.Generally speaking, the smell pollution thing that sewage treatment plant distributes can account for the 1/4-1/3 of full factory load.Main component comprises NMHC, hydrogen sulfide, mercaptan, thioether, methyl disulfide, rosin Volatile Gas etc.Wherein low molecular NMHC exists with the form of gas, and more macromolecular NMHC exists in aerocolloidal mode.Although wherein the pollutant absolute content of sulfur-bearing is not high, because their olfact is very low, in ppm level ppb level even, therefore bring strong sense organ to pollute.Become sewage treatment facility odoriferous source around.In this project, waste gas majority is air, complicated component but content is extremely low.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of waste gas that waste water in dyeing process is produced and carry out pretreated method;
The present invention also provides special-purpose waste gas pre-treating device in above-mentioned method.
The present invention realizes by following technical scheme:
The pretreated method of waste gas that dyeing waste water is produced, comprises following step:
Waste gas enters behind absorption tower, while flowing through packing layer from bottom to top, absorption liquid in the nozzle on top, absorption tower is sprayed at the surface of filler, waste gas and absorption liquid are in contact with one another at fully wetting filling surface simultaneously, under physics and chemisorption, the aerosol contaminants in waste gas is absorbed in cleaning solution;
Absorption liquid is delivered to nozzle with circulating pump from liquor box, the absorption liquid that diafiltration is got off is back to liquor box, is equipped with fluid reservoir, by measuring pump and pH controller, jointly controls, measuring pump is squeezed into concentrated solution to liquor box continuously from fluid reservoir, maintains absorption liquid concentration stabilize.
Above-mentioned absorption liquid is hydrogen peroxide or liquor natrii hypochloritis.
Above-mentioned filler is polyurethane foam, adopts the filler of this material, and specific area is large and resistance is little.
The thickness of above-mentioned packing layer is 2-3cm.
Preferably, the thickness of packing layer is 2.5cm.
The emission-control equipment of the pretreated method special use of printing and dyeing waste gas of the present invention, this device comprises absorption tower, there is packing layer inside, absorption tower, nozzle is arranged at top, absorption tower, nozzle be positioned at absorption tower directly over, nozzle is connected with circulating pump by pipeline, described circulating pump is connected with liquor box, the pipeline of packing layer below is connected with circulating pump, and liquor box is connected by pipeline successively with pH controller, measuring pump and liquid reserve tank.
Above-mentioned packing layer is positioned at the absorption tower At The Height of 1/4-1/3 from bottom to top.
Nozzle tilts to horizontal direction, and the angle of its inclination is 5-15 °.
Device of the present invention, produces a small amount of waste water in washing process, can enter Sewage Plant water inlet, can not produce secondary public hazards.
Beneficial effect of the present invention is, the waste gas that adopts method of the present invention and device to produce the waste water in dyeing process is processed, by removing the dust in foul smell, prevent that dust from entering follow-up bio-trickling filter and causing pressure drop to increase, with the failure of avoiding the increase of operating cost even to move; By washing, the foul smell humidity that makes the to enter subsequent biological treatment device degree that reaches capacity, meets the strict demand of biological treatment to humidity; By water washing, can also remove part solubility waste gas components, alleviate and cause the impact load that smelly composition sudden change causes to a certain extent, guarantee the relatively stable of subsequent biological treatment foul smell load.
Accompanying drawing explanation
Fig. 1 is waste gas pre-treating device structural representation of the present invention;
In figure, 1-absorption tower, 2-packing layer, 3-circulating pump, 4-liquor box, 5-pH controller, 6-measuring pump, 7-liquid reserve tank, 8-nozzle.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is further described, so that those skilled in the art more understands the present invention, but does not therefore limit the present invention.
Embodiment 1
The pretreated method of waste gas that dyeing waste water is produced, comprises following step:
Waste gas enters behind absorption tower 1, while flowing through packing layer 2 from bottom to top, absorption liquid in the nozzle 8 on 1 top, absorption tower is sprayed at the surface of filler, waste gas and absorption liquid are in contact with one another at fully wetting filling surface simultaneously, under physics and chemisorption, the aerosol contaminants in waste gas is absorbed in cleaning solution;
Absorption liquid is delivered to nozzle 8 with circulating pump 3 from liquor box 4, the absorption liquid that diafiltration is got off is back to liquor box 4, is equipped with fluid reservoir, by measuring pump 6 and pH controller 5, jointly controls, measuring pump 6 is squeezed into concentrated solution to liquor box 4 continuously from fluid reservoir, maintains absorption liquid concentration stabilize.
Above-mentioned absorption liquid is hydrogen peroxide;
Above-mentioned filler is polyurethane foam, adopts the filler of this material, and specific area is large and resistance is little.
The thickness of packing layer 2 is 2.5cm.
The waste gas pre-treating device of the pretreated method special use of printing and dyeing waste gas, this device comprises absorption tower 1, there is packing layer 21 inside, absorption tower, nozzle 8 is arranged at 1 top, absorption tower, nozzle 8 be positioned at absorption tower 1 directly over, nozzle 8 is connected with circulating pump 3 by pipeline, circulating pump 3 is connected with liquor box 4, the pipeline of packing layer 2 belows is connected with circulating pump 3, and liquor box 4 is connected by pipeline successively with pH controller 5, measuring pump 6 and liquid reserve tank 7.
Above-mentioned packing layer 2 is positioned at absorption tower 1 1/4 At The Height from bottom to top.
Nozzle 8 tilts to horizontal direction, and the angle of its inclination is 10 °.
When waste gas enters absorption tower 1 from bottom to top, while flowing through packing layer 2, the absorption liquid at nozzle 8 places is sprayed at filling surface uniformly to keep moistening, waste gas and absorption liquid are in contact with one another at fully moistening filling surface simultaneously, under physics and chemical action, aerosol contaminants in waste gas is absorbed in cleaning solution, reaches the object of removing pollutant.
Absorption liquid is delivered to nozzle 8 with circulating pump 3 from liquor box 4, the absorption liquid that diafiltration is got off is back to liquor box 4, fluid reservoir jointly controls by measuring pump 6 and pH controller 5, measuring pump 6 is squeezed into concentrated solution to liquor box 4 continuously from fluid reservoir, maintain the concentration stabilize of absorption liquid in some values, thereby guarantee efficient absorption.
The pretreated method of waste gas that dyeing waste water is produced, comprises following step:
Waste gas enters behind absorption tower 1, while flowing through packing layer 2 from bottom to top, absorption liquid in the nozzle 8 on 1 top, absorption tower is sprayed at the surface of filler, waste gas and absorption liquid are in contact with one another at fully wetting filling surface simultaneously, under physics and chemisorption, the aerosol contaminants in waste gas is absorbed in cleaning solution;
Absorption liquid is delivered to nozzle 8 with circulating pump 3 from liquor box 4, the absorption liquid that diafiltration is got off is back to liquor box 4, is equipped with fluid reservoir, by measuring pump 6 and pH controller 5, jointly controls, measuring pump 6 is squeezed into concentrated solution to liquor box 4 continuously from fluid reservoir, maintains absorption liquid concentration stabilize.
Above-mentioned absorption liquid is hydrogen peroxide.
Above-mentioned filler is polyurethane foam, adopts the filler of this material, and specific area is large and resistance is little.
The thickness of packing layer 2 is 2cm.
The emission-control equipment of the pretreated method special use of printing and dyeing waste gas of the present invention, device comprises absorption tower 1, there is packing layer 21 inside, absorption tower, and nozzle 8 is arranged at 1 top, absorption tower, nozzle 8 be positioned at absorption tower 1 directly over, nozzle 8 is connected with circulating pump 3 by pipeline, circulating pump 3 is connected with liquor box 4, and the pipeline of packing layer 2 belows is connected with circulating pump 3, and liquor box 4 is connected by pipeline successively with pH controller 5, measuring pump 6 and liquid reserve tank 7.
Above-mentioned packing layer 2 is positioned at absorption tower 1 1/4 At The Height from bottom to top.
Nozzle 8 tilts to horizontal direction, and the angle of its inclination is 5 °.
Embodiment 3
The pretreated method of waste gas that dyeing waste water is produced, comprises following step:
Waste gas enters behind absorption tower 1, while flowing through packing layer 2 from bottom to top, absorption liquid in the nozzle 8 on 1 top, absorption tower is sprayed at the surface of filler, waste gas and absorption liquid are in contact with one another at fully wetting filling surface simultaneously, under physics and chemisorption, the aerosol contaminants in waste gas is absorbed in cleaning solution;
Absorption liquid is delivered to nozzle 8 with circulating pump 3 from liquor box 4, the absorption liquid that diafiltration is got off is back to liquor box 4, is equipped with fluid reservoir, by measuring pump 6 and pH controller 5, jointly controls, measuring pump 6 is squeezed into concentrated solution to liquor box 4 continuously from fluid reservoir, maintains absorption liquid concentration stabilize.
Above-mentioned absorption liquid is liquor natrii hypochloritis.
Above-mentioned filler is polyurethane foam, adopts the filler of this material, and specific area is large and resistance is little.
The thickness of packing layer 2 is 3cm.
The emission-control equipment of the pretreated method special use of printing and dyeing waste gas of the present invention, device comprises absorption tower 1, there is packing layer 21 inside, absorption tower, and nozzle 8 is arranged at described 1 top, absorption tower, nozzle 8 be positioned at absorption tower 1 directly over, nozzle 8 is connected with circulating pump 3 by pipeline, circulating pump 3 is connected with liquor box 4, and the pipeline of packing layer 2 belows is connected with circulating pump 3, and liquor box 4 is connected by pipeline successively with pH controller 5, measuring pump 6 and liquid reserve tank 7.
Above-mentioned packing layer 2 is positioned at absorption tower 1 1/3 At The Height from bottom to top.
Nozzle 8 tilts to horizontal direction, and the angle of its inclination is 15 °.
Claims (8)
1. the pretreated method of waste gas that dyeing waste water produces, comprises following step:
Waste gas enters behind absorption tower, while flowing through packing layer from bottom to top, absorption liquid in the nozzle on top, absorption tower is sprayed at the surface of filler, waste gas and absorption liquid are in contact with one another at fully wetting filling surface simultaneously, under physics and chemisorption, the aerosol contaminants in waste gas is absorbed in cleaning solution;
Described absorption liquid is delivered to nozzle with circulating pump from liquor box, the absorption liquid that diafiltration is got off is back to liquor box, is equipped with fluid reservoir, by measuring pump and pH controller, jointly controls, measuring pump is squeezed into concentrated solution to liquor box continuously from fluid reservoir, maintains absorption liquid concentration stabilize.
2. the pretreated method of waste gas that dyeing waste water as claimed in claim 1 produces, is characterized in that, described absorption liquid is hydrogen peroxide or liquor natrii hypochloritis.
3. the pretreated method of waste gas that dyeing waste water as claimed in claim 1 produces, is characterized in that, described filler is polyurethane foam.
4. the pretreated method of waste gas that dyeing waste water as claimed in claim 1 produces, is characterized in that, the thickness of described packing layer is 2-3cm.
5. the pretreated method of waste gas that dyeing waste water as claimed in claim 1 produces, is characterized in that, the thickness of described packing layer is 2.5cm.
6. the emission-control equipment of the pretreated method special use of waste gas that dyeing waste water as claimed in claim 1 produces, it is characterized in that, described device comprises absorption tower, there is packing layer described inside, absorption tower, nozzle is arranged at described top, absorption tower, described nozzle be positioned at absorption tower directly over, described nozzle is connected with circulating pump by pipeline, described circulating pump is connected with liquor box, the pipeline of described packing layer below is connected with circulating pump, and described liquor box is connected by pipeline successively with pH controller, measuring pump and liquid reserve tank.
7. the emission-control equipment of the pretreated method special use of waste gas that dyeing waste water as claimed in claim 1 produces, is characterized in that, described packing layer is positioned at the absorption tower At The Height of 1/4-1/3 from bottom to top.
8. the emission-control equipment of the pretreated method special use of waste gas that dyeing waste water as claimed in claim 1 produces, is characterized in that, described nozzle tilts to horizontal direction, and the angle of its inclination is 5-15 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310725309.2A CN103691286A (en) | 2013-12-25 | 2013-12-25 | Method and device for pretreating waste gas generated by printing and dyeing wastewater |
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| CN201310725309.2A CN103691286A (en) | 2013-12-25 | 2013-12-25 | Method and device for pretreating waste gas generated by printing and dyeing wastewater |
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Cited By (2)
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| CN105126569A (en) * | 2015-09-27 | 2015-12-09 | 苏州日臻环保设备有限公司 | NaClO oxidation/composite photocatalysis/VOC (Volatile Organic Compound) absorption integrated waste gas treatment equipment and treatment method |
| CN114307589A (en) * | 2021-12-07 | 2022-04-12 | 重庆宏锐环保科技发展有限公司 | Sewage peculiar smell treatment method based on environmental engineering remediation |
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Cited By (2)
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| CN114307589A (en) * | 2021-12-07 | 2022-04-12 | 重庆宏锐环保科技发展有限公司 | Sewage peculiar smell treatment method based on environmental engineering remediation |
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Application publication date: 20140402 |