CN116920576A - Method for deodorizing waste gas of printing and dyeing setting machine - Google Patents
Method for deodorizing waste gas of printing and dyeing setting machine Download PDFInfo
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- CN116920576A CN116920576A CN202310624266.2A CN202310624266A CN116920576A CN 116920576 A CN116920576 A CN 116920576A CN 202310624266 A CN202310624266 A CN 202310624266A CN 116920576 A CN116920576 A CN 116920576A
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- 239000002912 waste gas Substances 0.000 title claims abstract description 81
- 230000001877 deodorizing effect Effects 0.000 title claims abstract description 43
- 238000004043 dyeing Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000007639 printing Methods 0.000 title claims abstract description 34
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000011282 treatment Methods 0.000 claims abstract description 39
- 238000004332 deodorization Methods 0.000 claims abstract description 17
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 8
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 65
- 238000011221 initial treatment Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 11
- 238000012856 packing Methods 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003546 flue gas Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000002407 reforming Methods 0.000 abstract description 2
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- 239000000126 substance Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000003595 mist Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
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- 239000003344 environmental pollutant Substances 0.000 description 3
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- 230000001590 oxidative effect Effects 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
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- 239000012752 auxiliary agent Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
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- 229930195733 hydrocarbon Natural products 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009965 odorless effect Effects 0.000 description 2
- 210000002345 respiratory system Anatomy 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 208000000884 Airway Obstruction Diseases 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010008479 Chest Pain Diseases 0.000 description 1
- 206010008589 Choking Diseases 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
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- 150000004665 fatty acids Chemical class 0.000 description 1
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- 239000003517 fume Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 210000004877 mucosa Anatomy 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
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- 238000001556 precipitation Methods 0.000 description 1
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- 235000020679 tap water Nutrition 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1406—Multiple stage absorption
-
- 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
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The application belongs to the field of waste gas treatment, and particularly relates to a method for deodorizing waste gas of a printing and dyeing setting machine. The waste gas deodorization process of the printing and dyeing setting machine has low one-time input cost and operation cost, and can be used without additional pretreatment of the flue gas because the process is not constrained by the flue gas working condition; the excess ozone after oxidation is self-decomposed into O after being absorbed by water 2 Therefore, no secondary pollution is generated. The technology is simple, has good effect, and is convenient for deodorizing, upgrading and reforming the established project. The process aims to finish the deodorization of the waste gas of the printing and dyeing setting machine with low cost and high deodorization efficiency on the basis of the waste gas treatment process and the characteristics of the waste gas of the existing printing and dyeing setting machine, and is convenient for deodorization, reconstruction and upgrading of the existing process.
Description
Technical Field
The application belongs to the field of waste gas treatment, and particularly relates to a method for deodorizing waste gas of a printing and dyeing setting machine.
Background
The waste gas treatment project of the setting machine in the textile printing and dyeing industry is a multi-benefit project, and long-term social benefits can be generated in the aspects of improving the community environment quality, improving the workshop working environment and the like after the project is implemented. Meanwhile, waste oil in the flue gas can be recovered through the implementation of waste gas treatment engineering, so that certain economic benefit is generated. The waste gas discharged by the printing and dyeing setting machine in operation contains a great amount of smoke dust, and also contains a plurality of polyphenyl organic matters, printing and dyeing auxiliary agents, oil and the likeThe seed components, each setting machine generally discharges 150-250 mg/m of particles 3 40-80 mg/m of lampblack 3 . The discharged oil, smoke and dust have great harm to human health and environment, and the pollution problem caused by the exhaust gas discharge of the setting machine is becoming more and more acute.
The setting machine is a key device for finishing after textile printing and dyeing. The temperature is higher in the cloth heat setting process, so that a large amount of high-temperature gas is generated in the baking oven of the setting machine, and the high-temperature gas contains organic oil, dye auxiliary agent, lubricating oil, fiber particles and other pollutants. The main components of the catalyst are aldehyde, ketone, hydrocarbon, fatty acid, alcohol, ester, lactone, heterocyclic compound and aromatic compound. The oil mist waste gas volatilized during the working of the setting machine is inhaled into human body, so that the respiratory tract mucosa can be directly damaged, the respiratory tract and the lung of the human body are stimulated to a certain extent, the immunity of the human body is reduced, the symptoms of choking cough, chest distress and shortness of breath are caused, the airway is contracted, and the respiratory resistance is increased. The oil mist volatilizes in the atmosphere and is not easy to dissolve in water, and can not fall to the ground along with rainwater, so that the oil mist floats in the air to form a long-term pollution source. Meanwhile, the molecular groups volatilized in the atmosphere in the oil mist can absorb the particulate matters, have complex components and strong adsorption capacity, are carriers and catalysts of various pollutants, can sometimes become an aggregate of the various pollutants, and are a source of photochemical reaction (pollution) in the air along with other volatile organic matters.
The waste gas treatment of the setting machine generally comprises a water spraying treatment process and an electrostatic treatment process. The electrostatic treatment process principle is as follows: the dust particles are charged by a strong electric field, and when the particles with positive/negative charges pass through the dust removing electrode, the particles are adsorbed by the negative/positive electrode plates respectively, so that the dust removing purpose is achieved. The electrostatic purifier is applied to the waste gas treatment of the setting machine, and mainly has the following defects: a. the dust must be filtered and then purified, and a multi-stage mechanical filter screen is usually selected. Because the waste gas of the setting machine contains a large amount of fibers and greasy dirt, the workload of cleaning and maintenance is increased; b. the temperature of the waste gas of the setting machine is sometimes up to 180-200 ℃, and even under the working condition of lower temperature of the waste gas, the condition of ignition is difficult to avoid. At this time, if the system is not safely and reliably protected, the electrostatic purifier is usually scrapped due to a fire. And the electrostatic treatment has relatively high requirements on the process and structure of the purifying equipment.
Setting mill workshops in the printing and dyeing industry are also an important source of malodorous gases. The waste gas of the setting machine contains a large amount of hydrocarbon compounds, wherein the compounds with molecular weight less than 200 and carbon number less than 15 are main substances causing strong pungent odor, and the organic pollutants with malodor are easy to induce respiratory diseases of human bodies and even cause canceration. The normal life of surrounding residents is seriously influenced, the physical health of enterprise workers is also endangered, and environmental complaints and pollution disputes are often caused.
Ozone (+2.07V) directly contacts and reacts with organic substances due to strong oxidizing property, and compound bonds of malodorous functional groups in gas molecules are cut off, so that malodorous gas is oxidized into odorless gas, and the odorless gas is discharged. Ozone can be decomposed into OH (hydroxyl radical, +2.80V) with extremely strong oxidizing property by certain technical means, and oxidation reaction is carried out between OH and malodorous organic matters. The indirect reaction of ozone has the advantages of high reaction rate, no selectivity and the like, and almost all organic substances can be thoroughly oxidized into CO by OH 2 And H 2 O。
Disclosure of Invention
The technical problems existing in the prior art are that the waste gas of the setting machine in the printing and dyeing industry has serious malodor, and has the characteristics of high temperature, high humidity, large air quantity, grease content and complex components, so that the deodorization of the waste gas of the printing and dyeing setting machine becomes a difficult problem. In order to solve the technical problems, the application provides the following technical scheme:
the application provides a method for deodorizing waste gas of a printing and dyeing setting machine, which comprises the following steps:
s1: introducing the waste gas into a cyclone tower for washing, cooling and then conveying the waste gas into an electrostatic tower;
adding ozone water solution for primary treatment in the washing process; after cooling, adding ozone gas for secondary treatment;
s2: the waste gas is conveyed to a packing tower after being adsorbed and cleaned in an electrostatic tower;
s3: the waste gas is discharged after three-stage treatment in a packed tower, and the waste gas deodorization of the printing and dyeing setting machine is completed; the tertiary treatment includes steps of ozone gas oxidation and water absorption.
Preferably, in the step S1, the concentration of the ozone water solution is 2-10mg/L during the primary treatment.
Preferably, in the step S1, the temperature of the exhaust gas is 80-120 ℃ during the primary treatment.
Preferably, in the step S1, after the ozone gas is mixed with the exhaust gas in the secondary treatment, the concentration of ozone is 10-50mg/m 3 。
Preferably, in the step S1, the temperature of the exhaust gas is 40-60 ℃ during the secondary treatment.
Preferably, in the step S1, the ozone aqueous solution and the ozone gas are supplied from a deodorizing device.
Preferably, in the step S3, ozone gas is supplied from a deodorizing device.
Preferably, when the ozone gas is oxidized, after the ozone gas is mixed with the waste gas, the concentration of the ozone in the mixed gas is 5-30mg/m 3 。
Preferably, the residence time of the exhaust gas and the ozone gas in the packed tower is 1-5s when the ozone gas is oxidized.
In the step S3, the purpose of water spraying in the packed tower is to absorb the intermediate product which is easily dissolved in water and still has malodorous smell and is generated after ozone oxidizes malodorous substances; and absorbing residual ozone in the tail gas.
Preferably, in the step S3, a fan device is used for the discharging.
The starting conditions of the primary treatment in the step S1, the secondary treatment in the step S1 and the tertiary treatment in the step S3 are determined by the odor concentration of the waste gas and the waste gas components. When the main substance causing the malodor of the exhaust gas is a substance which is easily soluble in water, the primary treatment in the step S1 and the secondary treatment in the step S1 are turned on to enhance the deodorization. And after the secondary treatment in the step S1, starting the tertiary treatment in the step S3 to further strengthen the treatment when the odor concentration still exceeds the emission standard. During the primary treatment, ozone water solution is added to eliminate some malodorous gases easy to dissolve in water.
Ozone is added during secondary treatment to treat malodorous gas insoluble in water.
Preferably, in the step S1, the aqueous solution of ozone and ozone are supplied by a deodorizing device, which is of the type berrime-hydroxyl radical deodorizing equipment.
Further, a dissolved air pump and an ejector are adopted in the deodorizing device to fully mix ozone gas and water to obtain an ozone water solution; when mixed, a large number of microbubbles are generated, and hydroxyl radicals are formed when the microbubbles collapse. Ozone generates the following chain reaction in the process of collapsing micro-bubbles to generate OH:
O 3 +3H 2 O*→3H 2 O 2 *
H 2 O 2 *→2·OH
O 3 →·O+O 2
·O+H 2 O→H 2 O 2 +O 2
H 2 O 2 *→H + +HO 2 -
H 2 O 2 *+H 2 O*→HO 2 - +H 3 O +
O 3 +HO 2 - →HO 2 ·+O 3 -
HO 2 ·→H + +O 2 - ·
HO 2 - +O 3 →O 2 +O 2 - ·+·OH
O 2 - ·+O 3 →O 2 +O 3 - ·
O 2 - ·+H 2 O 2 →O 2 +OH - +·OH
O 3 - ·+H + →HO 3 ·
HO 3 ·→O 2 +·OH
O 2 - ·+HO 3 ·→2O 2 +OH - ；
* Is the excited state of the substance.
Compared to direct oxidation, OH is not selective in the oxidation process and the oxidation rate is extremely fast (10 7 ～10 9 M -1 s -1 ). Due to the extremely strong oxidizing nature, OH can oxidize almost all organics and eventually degrade to CO 2 And H 2 O, therefore, the concentration of non-methane total hydrocarbon in the tail gas can be effectively reduced through the indirect reaction of ozone.
The working principle of the electrostatic tower is as follows: under the action of strong electric field, dust, oil mist and the like in the waste gas are enabled to carry negative charges and move towards the anode, and after neutralization, the dust, oil mist and the like are adsorbed, and precipitation is removed, so that the purpose of cleaning is achieved.
The packed tower has small fluid resistance and is suitable for the process with large gas treating capacity and small liquid capacity. The liquid flows down the packing surface from above and the gas is counter-current or co-current with the liquid, depending on the particular reaction. The liquid storage amount in the packed tower is smaller. The flow pattern in the column is close to plug flow, whether in the gas or liquid phase.
The packed tower is used to absorb some malodorous gases without being thoroughly oxidized, but rather to become readily water soluble.
The technical scheme is as follows: the technical scheme is based on the conventional waste gas fume removal process (cyclone tower, cooler and electrostatic tower) of the printing and dyeing setting machine, and comprises a three-stage deodorization process, (1) primary treatment: adding an ozone water solution to treat some malodorous gases which are easy to dissolve in water; (2) and (3) secondary treatment: ozone gas is added to treat malodorous gas which is difficult to dissolve in water or insoluble in water; (3) and (3) three-stage treatment: the newly added packed tower absorbs some malodorous gases without being thoroughly oxidized, but rather is oxidized into readily water-soluble components.
Compared with the prior art, the technical scheme of the application has the following advantages:
the waste gas deodorizing process of the printing and dyeing boarding machine has low one-time input cost and operation cost, and the process is not limited by the working condition of the smoke, so that the smoke is not required to be additionally pretreatedThe process may be used; the excess ozone is converted into O by self-decomposition 2 Therefore, no secondary pollution is generated.
The waste gas deodorization process of the printing and dyeing setting machine has good safety and stability, ozone gas and ozone water can be immediately subjected to oxidation reaction with malodorous organic matters in the waste gas after being added into the system, and accumulation of the organic matters can not be generated, so that potential safety hazards are caused, a newly added filling tower at the tail end is continuously sprayed with water, and the occurrence of fire hazards is also avoided. The deodorizing equipment can continuously generate ozone gas and ozone water by only providing compressed air, tap water and a power supply without manual duty.
The technology is simple, has good effect, and is convenient for deodorizing, upgrading and reforming the established project. The process aims to finish the deodorization of the waste gas of the printing and dyeing setting machine with low cost and high deodorization efficiency on the basis of the waste gas treatment process and the characteristics of the waste gas of the existing printing and dyeing setting machine, and is convenient for deodorization, reconstruction and upgrading of the existing process.
Drawings
FIG. 1 is a flow chart of a deodorizing process of a printing and dyeing machine.
Reference numerals illustrate: 1-cyclone tower, 2-cooler, 3-static tower, 4-filler tower, 5-fan, 6-exhaust tube and 7-deodorizing device.
Detailed Description
The present application will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the application and practice it.
A waste gas deodorizing system of a printing and dyeing setting machine comprises a cyclone tower 1, a cooler 2, an electrostatic tower 3 and a packing tower 4. The air inlet of the cyclone tower 1 is connected with a printing and dyeing waste gas discharge pipe, and the air outlet is connected with the air inlet of the electrostatic tower 3; the connection part of the cyclone tower 1 and the electrostatic tower 3 is provided with a cooler 2. The liquid inlet of the cyclone tower 1 is connected with the liquid outlet of the deodorizing device 7, the air outlets of the electrostatic tower 3 and the deodorizing device 7 are connected with the air inlet of the filler tower 4, the air outlet of the filler tower 4 is provided with a fan 5, and the air outlet of the filler tower 4 is connected with an exhaust funnel 6.
Example 1
A method for deodorizing waste gas of a printing and dyeing setting machine comprises the following steps:
(1) Introducing the waste gas into a cyclone tower 1 for washing, cooling and then conveying the waste gas into an electrostatic tower 3; in the washing process, at 90 ℃, adding 6mg/L ozone water solution into a deodorizing device 7 for primary treatment to remove some malodorous gases which are easy to dissolve in water;
cooling, adding ozone into deodorizing device 7 at 50deg.C for secondary treatment to obtain ozone concentration of 25mg/m 3 And (3) treating malodorous gases which are difficult to dissolve in water or insoluble in water.
(2) The waste gas is conveyed to a packing tower 4 after being adsorbed and cleaned in an electrostatic tower 3;
(3) The waste gas is added into a packed tower 4 with the concentration of 15mg/m 3 Ozone gas is oxidized and water is discharged from an exhaust funnel 6 through a fan 5 after being absorbed (three-stage treatment) for 3 seconds, so that the waste gas deodorization of the printing and dyeing setting machine is completed.
Example 2
A method for deodorizing waste gas of a printing and dyeing setting machine comprises the following steps:
(1) Introducing the waste gas into a cyclone tower 1 for washing, cooling and then conveying the waste gas into an electrostatic tower 3; in the washing process, at 80 ℃, adding 5mg/L ozone water solution into a deodorizing device 7 for primary treatment to remove some malodorous gases which are easy to dissolve in water;
cooling, adding ozone into deodorizing device 7 at 40deg.C for secondary treatment to obtain ozone concentration of 20mg/m 3 And (3) treating malodorous gases which are difficult to dissolve in water or insoluble in water.
(2) The waste gas is conveyed to a packing tower 4 after being adsorbed and cleaned in an electrostatic tower 3;
(3) The waste gas was fed into the packed column 4 at a concentration of 10mg/m 3 Ozone gas is oxidized and water is discharged from an exhaust funnel 6 through a fan 5 after being absorbed (three-stage treatment) for 1s, so that the waste gas deodorization of the printing and dyeing setting machine is completed.
Example 3
A method for deodorizing waste gas of a printing and dyeing setting machine comprises the following steps:
(1) Introducing the waste gas into a cyclone tower 1 for washing, cooling and then conveying the waste gas into an electrostatic tower 3; in the washing process, 8mg/L ozone water solution is added into the deodorizing device 7 for primary treatment at 100 ℃ to treat some malodorous gases which are easy to dissolve in water;
cooling, adding ozone into the deodorizing device 7 at 60deg.C for secondary treatment to give ozone concentration of 30mg/m 3 And (3) treating malodorous gases which are difficult to dissolve in water or insoluble in water.
(2) The waste gas is conveyed to a packing tower 4 after being adsorbed and cleaned in an electrostatic tower 3;
(3) The waste gas was fed into the packed column 4 at a concentration of 5mg/m 3 Ozone gas is oxidized and water is discharged from an exhaust funnel 6 through a fan 5 after being absorbed (three-stage treatment) for 5 seconds, so that the waste gas deodorization of the printing and dyeing setting machine is completed.
Example 4
A method for deodorizing waste gas of a printing and dyeing setting machine comprises the following steps:
(1) Introducing the waste gas into a cyclone tower 1 for washing, cooling and then conveying the waste gas into an electrostatic tower 3; in the washing process, at 120 ℃, 8mg/L ozone water solution is added into a deodorizing device 7 for primary treatment, so as to treat some malodorous gases which are easy to dissolve in water;
cooling, adding ozone into deodorizing device 7 at 40deg.C for secondary treatment to obtain ozone concentration of 50mg/m 3 And (3) treating malodorous gases which are difficult to dissolve in water or insoluble in water.
(2) The waste gas is conveyed to a packing tower 4 after being adsorbed and cleaned in an electrostatic tower 3;
(3) The waste gas was fed into the packed column 4 at a concentration of 30mg/m 3 Ozone gas is oxidized and water is discharged from an exhaust funnel 6 through a fan 5 after being absorbed (three-stage treatment) for 4 seconds, so that the waste gas deodorization of the printing and dyeing setting machine is completed.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present application will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present application.
Claims (10)
1. The method for deodorizing the waste gas of the printing and dyeing setting machine is characterized by comprising the following steps of:
s1: introducing the waste gas into a cyclone tower (1) for washing, cooling and then conveying the waste gas into an electrostatic tower (3);
adding ozone water solution for primary treatment in the washing process; after cooling, adding ozone gas for secondary treatment;
s2: the waste gas is conveyed to a packing tower (4) after being adsorbed and cleaned in an electrostatic tower (3);
s3: the waste gas is discharged after three-stage treatment in a packing tower (4) to finish the deodorization of the waste gas of the printing and dyeing setting machine; the tertiary treatment includes steps of ozone gas oxidation and water absorption.
2. The method for deodorizing waste gas of dyeing and setting machine according to claim 1, wherein the concentration of ozone aqueous solution is 2-10mg/L during the primary treatment in the step S1.
3. The method for deodorizing exhaust gas of a dyeing and setting machine according to claim 1, wherein the temperature of the exhaust gas is 80-120 ℃ during the primary treatment in the step S1.
4. The method for deodorizing waste gas of dyeing and setting machine according to claim 1, wherein in the step S1, the concentration of ozone is 10-50mg/m after the ozone gas is mixed with the waste gas in the secondary treatment 3 。
5. The method for deodorizing exhaust gas of a dyeing and setting machine according to claim 1, wherein the temperature of the exhaust gas is 40-60 ℃ during the secondary treatment in the step S1.
6. The method for deodorizing waste gas of a dyeing and setting machine according to claim 1, wherein in the step S1, the ozone aqueous solution and the ozone gas are supplied by a deodorizing means (7).
7. The method for deodorizing waste gas of dyeing and setting machine according to claim 6, wherein the deodorizing device (7) is a device for thoroughly mixing ozone gas and water by using a dissolved air pump and a jet device to obtain ozone water solution.
8. The method for deodorizing waste gas of a dyeing and setting machine according to claim 1, wherein in the step S3, ozone gas is supplied from a deodorizing means (7).
9. The method for deodorizing waste gas of dyeing and setting machine according to claim 1, wherein the concentration of ozone in the mixed gas is 5-30mg/m after the ozone gas is mixed with the waste gas when the ozone gas is oxidized 3 。
10. The method for deodorizing waste gas of dyeing and setting machine according to claim 1, characterized in that the residence time of the waste gas and ozone gas in the packed tower (4) is 1-5s when the ozone gas is oxidized.
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| CN202310624266.2A CN116920576A (en) | 2023-05-30 | 2023-05-30 | Method for deodorizing waste gas of printing and dyeing setting machine |
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| CN202310624266.2A CN116920576A (en) | 2023-05-30 | 2023-05-30 | Method for deodorizing waste gas of printing and dyeing setting machine |
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