Integrated treatment system for printing and dyeing waste gas

Abstract

The comprehensive treatment system for printing and dyeing waste gas relates to the technical field of waste gas treatment, and includes an oxidation chamber, a connecting pipe, an absorption chamber and an emission tower which are sequentially connected from the air inlet end to the emission end; both the oxidation chamber and the absorption chamber are arranged horizontally, and the inlet of the oxidation chamber is connected to the waste gas source; the system also includes an oxidant spray pipe, an oxidation liquid spray pipe and an absorption spray pipe, the oxidant spray pipe extends into the inlet of the oxidation chamber and is connected to an oxidant nozzle; the oxidation liquid spray pipe extends into the oxidation chamber and is connected to an oxidation liquid nozzle, the absorption spray pipe extends into the absorption chamber and is then connected to an absorption nozzle; an oxidation spiral body is connected in the oxidation chamber, and the oxidation spiral body is arranged on one side of the liquid outlet of the oxidant nozzle, and an absorption spiral body is connected in the absorption chamber. The waste gas from the printing and dyeing factory is transported to the oxidation chamber by a draft fan for oxidation, and then the flue gas enters the absorption section to realize the absorption of harmful substances in the flue gas. The flue gas enters the emission tower, and the final flue gas undergoes dehydration and demisting and is discharged up to the standard.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment. Background Art

[0002] Chemical fiber materials will decompose and release pungent and unpleasant odors at high temperatures. Different chemical fiber materials contain different substances in the waste gas, but the basic components mainly include CO 2 , CO, NO, NO 2 , alcohols, aldehydes, ketones, acids, acid anhydrides, benzene, ammonia, and their aliphatic and aromatic hydrocarbons and saturated and unsaturated compounds. It may also contain toxic and harmful phosgene (COCl 2 ), hydrogen cyanide (HCN), etc.

[0003] The waste gas released during the processing of chemical fiber fabrics (such as baking) will cause air pollution to the production workshop and the surrounding environment, endangering the physical health of workers and surrounding residents. At present, the applicable methods for the purification and treatment of such waste gas mainly include adsorption method, combustion method, and oxidation method.

[0004] 1. Adsorption method: Using substances such as activated carbon that have adsorption capacity for organic waste gas to adsorb and remove harmful organic substances in the waste gas. The adsorbent adsorbed with organic substances is desorbed and reused, and the desorbed organic substances can be treated by combustion or recovery. The key points of the adsorption method process are the desorption and reuse of the adsorbent and how to treat the desorbed organic substances. A typical process such as rotary adsorption combustion is to first adsorb and concentrate the organic substances in the low-concentration waste gas with a rotary wheel, and then desorb and burn them. This process has a large investment, high energy consumption, and high purification efficiency for organic substances. However, there are still NOX emissions and the generation of organic combustion products (such as dioxins).

[0005] 2. Combustion method: The combustion of chemical fiber materials is actually the decomposition of chemical fiber materials at high temperatures to release volatile combustible gases, and the generation of active free radicals such as OH ． , H, etc. The free radicals further decompose the organic compound molecules and release heat, causing the temperature to continue to rise. This process rapidly decomposes the compounds from large molecules into small molecules, and finally generates inorganic substances, such as (CO 2 , water, NO X ). The products of complete combustion should be inorganic substances, but it is difficult to achieve complete combustion during the waste gas treatment process. Therefore, in addition to containing CO 2 , NO X in the discharged gas, there may also be unburned organic volatile gases and high-temperature products of organic combustion (such as dioxins), etc. The combustion method has high energy consumption, a large flow rate of discharged waste gas, and a low organic matter content, and it is difficult to implement alone. A better process combination is the adsorption rotary wheel combustion process.

[0006] 3. Oxidation process: Most of the organic substances in the waste gas are reducing substances. Under oxidizing conditions, organic substances may undergo oxidation-reduction reactions, and under the action of highly active free radicals, bond breaking and decomposition may occur. The oxidation process is to use chemical oxidants or to form active free radicals by exciting substances such as water in the waste gas through high-energy substances such as light, electricity, sound, and magnetism, and the active free radicals oxidize and decompose the organic substances. In the existing oxidation processes, due to unreasonable layouts and poor treatment effects, organic substances cannot be oxidized into inorganic substances (such as mineralized into CO2, water, etc.). Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a comprehensive treatment system for printing and dyeing waste gas to achieve ultra-clean emission.

[0008] The purpose of the present invention is achieved as follows: The comprehensive treatment system for printing and dyeing waste gas includes an oxidation chamber, a connecting pipe, an absorption chamber, and an emission tower connected in sequence from the intake end to the emission end; both the oxidation chamber and the absorption chamber are arranged horizontally, and the inlet of the oxidation chamber is connected to the waste gas source; the system also includes an oxidant spray pipe, an oxidation liquid spray pipe, and an absorption spray pipe. The oxidant spray pipe extends into the inlet of the oxidation chamber and is connected to an oxidant nozzle; the oxidation liquid spray pipe extends into the oxidation chamber and is connected to an oxidation liquid nozzle, and the absorption spray pipe extends into the absorption chamber and is then connected to an absorption nozzle; an oxidation spiral body is connected in the oxidation chamber, and the oxidation spiral body is arranged on one side of the liquid outlet of the oxidant nozzle. An absorption spiral body is connected in the absorption chamber.

[0009] The waste gas from the printing and dyeing factory is transported to the oxidation chamber by a blower for oxidation. In the oxidation chamber, the atomized and sprayed oxidant contacts the smoke flow in the same direction. With the help of the diversion and turbulence of the cylinder wall, the gas continuously impacts, delays, stays, refines, absorbs, and undergoes chemical reactions in the chamber, and gradually forms a power wave, making the smoke in a turbulent state. The harmful components in the smoke have a wider contact surface with the oxidant and the reaction is more sufficient. As the gas flows, then the smoke enters the absorption section to achieve the absorption of harmful substances in the smoke. At the same time, with the atomized spraying of a dense reducing solvent to collect the oxidation products, the smoke enters the emission tower. The final smoke undergoes dehydration and demisting and is discharged up to standard.

[0010] The treatment system of the present invention also includes an activator storage tank, an oxidant storage tank, and an oxidant activation reaction tank; the activator storage tank is connected to the oxidant activation reaction tank through an activator transfer pump. A stirrer is connected inside the oxidant storage tank. The oxidant storage tank is connected to an oxidant transfer pump. The oxidant transfer pump, the compressed air transfer pipe, and the tap water pipe are connected in parallel and then connected to the oxidant activation reaction tank. The oxidant activation reaction tank is connected to the inlet of the oxidant spray pipe. The oxidant in the oxidant storage tank is chlorine dioxide. Chlorine dioxide is a strong oxidant and has the ability to oxidize and decompose organic pollutants.

[0011] The treatment system of the present invention further includes an oxidation tank; the liquid inlet of the oxidation liquid spray pipe is connected to the oxidation tank through an oxidation pump, and the oxidation chamber is connected to the oxidation tank through an oxidation return pipe. The liquid circulates from the oxidation tank → oxidation pump → oxidation liquid spray pipe → oxidation chamber → oxidation return pipe → oxidation tank.

[0012] There are two oxidation pumps in the present invention. The liquid inlets of the two oxidation pumps are connected to the oxidation tank in parallel, and the liquid outlets of the two oxidation pumps are connected to the oxidation liquid spray pipe in parallel. One of the two oxidation pumps is in normal use and the other is in reserve.

[0013] The treatment system of the present invention further includes an absorption tank. The liquid inlet of the absorption spray pipe is connected to the absorption tank through an absorption pump. The liquid inlet of the absorption pump is also connected to a chemical agent tank, and the absorption chamber is connected to the absorption tank through an absorption return pipe. The chemical agent and the liquid in the absorption tank enter the absorption spray pipe through the absorption pump, and after spraying in the absorption chamber, they enter the absorption tank again through the absorption return pipe.

[0014] There are two absorption pumps in the present invention. The liquid inlets of the two absorption pumps are connected to the absorption tank in parallel, and the liquid outlets of the two absorption pumps are connected to the absorption spray pipe in parallel. One of the two absorption pumps is in normal use and the other is in reserve.

[0015] The oxidation spiral body and the absorption spiral body of the present invention have the same structure, both including a spiral body. The diameter of the spiral body gradually increases from one end to the other end, and a support frame is connected inside the spiral body.

[0016] In the present invention, a quartz high-temperature carbonizer and a grille are connected inside the discharge tower. The quartz high-temperature carbonizer includes a quartz tube and a high-temperature heating layer on the surface of the quartz tube. The grille is located below the quartz high-temperature carbonizer, and a filler is arranged on the grille. The discharge tower is equipped with a quartz high-temperature carbonizer, which is mainly assembled by quartz tubes. The inside of the quartz high-temperature carbonizer is made of quartz tube polymer material, so that a high-temperature heating layer is attached to the surface of the quartz tube to cause a decomposition reaction of the malodorous gas, excessive oxidant and absorbent in the flue gas.

[0017] The treatment system of the present invention further includes an operation platform, which includes a lower operation platform and an upper operation platform. The oxidation chamber and the absorption chamber are arranged vertically. The oxidation chamber is connected to the upper operation platform, and the absorption chamber is connected to the lower operation platform. The upper and lower two layers reduce the floor area, have a more reasonable layout, and are modularly designed.

[0018] The inlet of the oxidation chamber of the present invention is connected to an induced draft fan, and the inlet of the induced draft fan is connected to a cooling tower. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the present invention.

[0020] Figure 2 is Figure 1Schematic diagram of the flue gas purification mechanism.

[0021] Figure 3 For Figure 1 Schematic diagram of the CDO generator in

[0022] Figure 4 Schematic diagram of the structure of the oxidation helix.

[0023] In the figure, 1 is a stenter, 2 is a cooling tower, 3 is an induced draft fan, 4 is the lower operation platform, 5 is the upper operation platform, 6 is the oxidant spray pipe, 7 is the flue gas purification mechanism, 8 is the CDO generator, 9 is the oxidation return pipe, 10 is the oxidation tank, 11 is the oxidation pump, 12 is the oxidation liquid spray pipe, 13 is the chemical agent tank, 14 is the absorption pump, 15 is the absorption spray pipe, 16 is the absorption tank, 17 is the absorption return pipe, 18 is the discharge grille, 19 is the packing, 20 is the quartz high-temperature carbonizer, 21 is the discharge tower, 22 is the liquid circulation mechanism, 23 is the oxidant nozzle, 24 is the oxidation helix, 25 is the oxidation liquid nozzle, 26 is the oxidation chamber, 27 is the oxidation grille, 28 is the connecting pipe, 29 is the absorption helix, 30 is the absorption nozzle, 31 is the absorption grille, 32 is the absorption chamber, 33 is the helix body, 34 is the support frame, 35 is the oxidant activation reaction tank, 36 is the activator delivery pump, 37 is the activator storage tank, 38 is the oxidant delivery pump, 39 is the oxidant storage tank, 40 is the agitator, 41 is the tap water pipe, 42 is the compressed air delivery pipe. Detailed implementation method

[0024] As Figures 1-3 shown, the comprehensive treatment system for printing and dyeing waste gas mainly includes a flue gas purification mechanism 7, a chemical agent preparation mechanism, and a liquid circulation mechanism 22.

[0025] The flue gas purification mechanism 7 includes an oxidation chamber 26, a connecting pipe 28, an absorption chamber 32, and a discharge tower 21 that are sequentially connected from the intake end to the discharge end. It is made of a polymer material, does not require any anti-corrosion treatment, has high strength and sufficient toughness. The flue gas purification mechanism 7 also includes an operation platform, and the operation platform includes a lower operation platform 4 and an upper operation platform 5. Both the oxidation chamber 26 and the absorption chamber 32 are horizontally arranged, and the oxidation chamber 26 and the absorption chamber 32 are arranged vertically. The oxidation chamber 26 is connected to the upper operation platform 4, and the absorption chamber 32 is connected to the lower operation platform 5. The inlet of the oxidation chamber 26 is connected to the induced draft fan 3, and the inlet of the induced draft fan 3 is connected to the cooling tower 2. The waste gas generated by the stenter 1 is connected to the inlet of the cooling tower 2.

[0026] The flue gas purification mechanism 7 also includes an oxidant spray pipe 6, an oxidation liquid spray pipe 12, and an absorption spray pipe 15. The outlet of the oxidant spray pipe 6 extends into the inlet of the oxidation chamber 26 and is connected to the oxidant nozzle 23. The outlet of the oxidation liquid spray pipe 12 extends into the oxidation chamber 26 and is connected to the oxidation liquid nozzle 25. The outlet of the absorption spray pipe 15 extends into the absorption chamber 32 and is then connected to the absorption nozzle 30.

[0027] An oxidation spiral 24 is connected inside the inlet of the oxidation chamber 26. The oxidation spiral 24 is arranged on one side of the liquid outlet of the oxidant nozzle 23. An oxidation grid 27 is connected inside the middle of the oxidation chamber 26, and the oxidation spiral 24 is connected to the oxidation grid 27. An absorption spiral 29 is connected to the inlet of the absorption chamber 32. An absorption grid 31 is connected inside the middle of the absorption chamber 32, and the absorption spiral 29 is connected to the absorption grid 31. The oxidation spiral 24 and the absorption spiral 29 have the same structure, both including a spiral body 33, the diameter of the spiral body 33 gradually increasing from one end to the other end, and a support frame 34 is connected inside the spiral body 33.

[0028] A quartz high-temperature carbonizer 20 and a grid 18 are connected inside the discharge tower 21. The quartz high-temperature carbonizer 20 includes a quartz tube 201 and a high-temperature heating layer 202 on the surface of the quartz tube 201. The grid 18 is located below the quartz high-temperature carbonizer 18, and a filler 19 is arranged on the grid 18.

[0029] The oxidant preparation mechanism includes a CDO generator 8 and an absorbent dosing device. The CDO generator 8 includes an activator storage tank 37, an oxidant storage tank 39, and an oxidant activation reaction tank 35. The activator storage tank 37 is connected to the oxidant activation reaction tank 35 through an activator delivery pump 36. The oxidant storage tank 39 contains chlorine dioxide. A stirrer 40 is connected inside the oxidant storage tank 39. The oxidant storage tank 39 is connected to an oxidant delivery pump 38. The oxidant delivery pump 38, a compressed air delivery pipe 42, and a tap water pipe 41 are connected in parallel and then connected to the oxidant activation reaction tank 35. The inlet of the oxidant spray pipe 6 is connected to the oxidant activation reaction tank 35.

[0030] The liquid circulation mechanism 22 includes an oxidation tank 10 and an absorption tank 16. The inlet of the oxidation liquid spray pipe 12 is connected to the oxidation tank 10 through an oxidation pump 11. The oxidation chamber 26 is connected to the oxidation tank 10 through an oxidation return pipe 9. There are two oxidation pumps 10. The inlets of the two oxidation pumps 10 are connected in parallel to the oxidation tank 10, and the outlets of the two oxidation pumps 10 are connected in parallel to the oxidation liquid spray pipe 12.

[0031] The inlet of the absorption spray pipe 15 is connected to the absorption tank 16 through an absorption pump 14. The inlet of the absorption pump 14 is also connected to a chemical agent tank 13. The absorption chamber 32 is connected to the absorption tank 16 through an absorption return pipe 17. There are two absorption pumps 14. The inlets of the two absorption pumps 14 are connected in parallel to the absorption tank 16, and the outlets of the two absorption pumps 14 are connected in parallel to the absorption spray pipe 15. The chemical agent tank 13, the absorption pump 14, and the absorption spray pipe 15 form an absorbent dosing device.

[0032] The working principle of the present invention:

[0033] The exhaust gas from the stenter in the printing and dyeing factory, after electrostatic dust removal and treatment by an oil fume purifier, is transported to the oxidation chamber through a blower for oxidation. In the oxidation chamber, the atomized oxidant is in contact with the flue gas flow in the same direction. With the help of the oxidation spiral for diversion and turbulence, the gas continuously collides, delays, stays, refines, absorbs, and undergoes chemical reactions in the chamber, gradually forming a dynamic wave, making the flue gas in a turbulent state. The harmful components in the flue gas have a wider contact surface with the oxidant, and the reaction is more sufficient. As the gas flows, the flue gas then enters the absorption section to achieve the absorption of harmful substances in the flue gas. At the same time, with the atomized spraying of a dense reducing solvent to collect the oxidation products, the flue gas enters the emission tower. The emission tower is equipped with a quartz high-temperature carbonizer, which is mainly assembled by quartz tubes. The interior of the quartz high-temperature carbonizer is made of quartz tube polymer materials, so that a high-temperature heating layer adheres to the surface of the quartz tube, causing the malodorous gas, excessive oxidant, and absorbent in the flue gas to undergo decomposition reactions. The final flue gas undergoes dehydration and demisting and is discharged up to standard.

[0034] Introduction to the oxidant:

[0035] Chlorine dioxide is a highly efficient chemical oxidant. It has 19 valence electrons in its molecule, with one unpaired valence electron that can jump between chlorine, one oxygen, and the other two oxygen atoms. Therefore, it itself is like a free radical. This special molecular structure determines that ClO 2 has strong oxidizing properties. The redox potential of ClO 2 is 1.511V (ozone is 2.07V), but it varies with pH and the concentration of ClO 2 .

[0036] φ-=1.511 - 0.0473pH + 0.0118Lg[ClO 2 / [Cl -

[0037] That is, the stronger the acidity and the higher the concentration of ClO 2 , the higher its redox potential.

[0038] ClO 2 can undergo redox reactions with inorganic substances such as iron, manganese, sulfides, cyanides, and nitrogen-containing compounds, as well as with organic compounds such as phenols, organic sulfides, polycyclic aromatic hydrocarbons, amines, unsaturated compounds, alcohols, aldehydes, carbohydrates, amino acids, and pesticides.

[0039] Chlorine dioxide decomposes rapidly when it encounters water, generating a variety of strong oxidants - HClO 3 , HClO 2 , Cl 2 , H 2 O 2 etc., and can generate a variety of highly oxidizing active groups (i.e., free radicals ClO ．, Cl ． , H ． , OH ． , O ． ) These free radicals can excite the active hydrogen in organic molecules and generate R ． free radicals through dehydrogenation reaction, becoming the inducer for further oxidation. They can also substitute groups such as -SO 3 H, -NO 2 etc. on the aromatic hydrocarbon through hydroxyl substitution reaction to generate unstable hydroxyl substitution intermediates. These hydroxyl substitution intermediates are prone to ring-opening cleavage until they are completely decomposed into inorganic substances. In addition, ClO 2 can also oxidize reducing substances such as S 2- , amines, phenols, etc. to eliminate the odor of organic substances.

[0040] Analysis of the oxidation process:

[0041] The oxidation process of ClO 2 on organic substances is generally completed in stages. For example, for aromatic hydrocarbon organic substances, their degradation changes can be divided into three stages:

[0042] (1) In the initial stage of the reaction, hydrocarbon compounds of the benzene ring first appear, such as catechol, hydroquinone, and p-benzoquinone;

[0043] (2) The products that appear in the second stage are dibasic acids after the benzene ring structure is broken. At the beginning, maleic acid is the main one with a relatively high concentration. As the oxidation process deepens, the carbon chain continues to break, generating small-molecule carboxylic acids such as oxalic acid and formic acid, and oxalic acid is the main one;

[0044] (3) The third stage is the deep oxidation stage, where the intermediate products sharply decrease and the products are mainly carbon dioxide (eventually achieving mineralization).

[0045] In short, ClO 2 is a strong oxidant and has the ability to oxidize and decompose organic pollutants. Completing the above three stages of oxidizing and degrading organic substances is related to process design, equipment structure, etc., and is also the key condition for whether it can meet the requirement of providing efficient purification of organic substances:

[0046] (1) Sufficient time and space are required for the oxidation reaction. Organic waste gas generally has a large gas volume, a low concentration of organic pollutants, and a short residence time in the purification device. If the concentration of the active oxide provided is also low, the oxidation reaction cannot complete the three-stage oxidation process in a short time, that is, the purification efficiency is not high. Only the chemical oxidation process can transfer the organic matter in the waste gas into the liquid phase oxidant by dissolving, adsorbing, absorbing or mixing, which effectively prolongs the oxidation reaction time and achieves the goal of efficiently purifying the waste gas. The high-energy release of oxidizing active free radicals process and the odor chemical oxidation process are both completely gas phase reactions, and both have the problems of low concentration of oxidizing active substances and short oxidation residence time (generally a few seconds). Only ClO 2 It can realize gas phase and liquid phase oxidation, can realize gas phase organic matter oxidation, realize organic matter transfer into liquid phase, realize long-term oxidation of organic matter in liquid phase. The oxidation time can be as long as several hours, several days, several months, which can ensure that the oxidation has sufficient reaction time and it is possible to complete the third stage of the oxidation reaction.

[0047] (2) Providing oxidation process conditions: The oxidation reaction efficiency is related to the oxidant concentration, acidity, temperature and other conditions. If the organic waste gas is a low-content, high-flow gas, the oxidant concentration is low, and the oxidation reaction efficiency is also low. If the oxidant concentration is excessive, the oxidation reaction efficiency will increase, but the cost of the oxidant will increase greatly. This is also a problem that cannot be solved by gas-phase oxidation processes such as high-energy release of active substances and ozone. 2 It is soluble in water and can achieve gas-phase and liquid-phase co-oxidation. In the liquid phase, it can provide suitable high concentration, high acidity and certain temperature conditions to ensure that the process conditions required for the oxidation reaction are met.

[0048] From the above comparison of the performance characteristics of chlorine dioxide and other oxidants, it can be seen that chlorine dioxide has special advantages for the treatment of organic waste gas. ⑴. It is a strong oxidant that can decompose a variety of active free radicals; ⑵. It is an oxidant with high oxidation ability in gas phase and liquid phase, and can simultaneously complete the co-oxidation of gas phase and liquid phase; ⑶. While oxidizing and degrading organic matter, it can effectively deodorize, decolorize, and remove NOx from organic waste gas and wastewater.

[0049] Absorption system:

[0050] The non-condensable low-boiling organic flue gas is fully contacted with the dissolving detergent matching the components, and most of the organic matter and all the inorganic matter (99%) are removed. After dust removal and demisting through the tube bundle device, the flue gas that meets the standards is directly discharged. The wet purification device has a good effect on removing the odor in the exhaust gas.

[0051] The flue gas pressurization and turbulence adopted in this process refer to the state where the oxidation flue gas is pressurized and presented in a turbulent state. The flue gas in the pressurized turbulent state is conducive to the implementation of subsequent technological processes. During the oxidation reaction stage, the flue gas in the turbulent state can undergo an instantaneous oxidation reaction with the gaseous oxidant. Then, a reducing solution and an alkaline solution are atomized and sprayed, and they are fully mixed and contacted in the packing layer for absorption reaction.

[0052] In the process adopted by the present invention, when the flue gas passes through the oxidation reaction zone and the absorption zone, the atomized absorption liquid can naturally aggregate into droplets, and then the droplets are collected and refluxed to the oxidation pool. In this way, the liquid in the oxidation pool passes through a circulation pump, pipelines, and nozzles, making the liquid oxidation liquid present a mist state, thus constituting a cycle of the oxidation liquid from the liquid state to the mist state and then back to the liquid state. At the same time, the concentration and pH value of the oxidation liquid are adjusted in the oxidation pool, which is convenient to implement, so that the oxidation liquid can always be in an effective state, facilitating the reaction with the flue gas.

[0053] In the absorption chamber part, an alkaline solution is transported from the reagent tank into the absorption chamber. The flue gas after the oxidation reaction undergoes sufficient chemical reactions with the misty alkaline solution. This is another important process in the flue gas treatment process. When the gas passes through the alkaline solution absorbent, the misty alkaline solution after the reaction can naturally aggregate into droplets, and then the droplets are collected and refluxed to the absorption pool. In this way, the alkaline solution in the absorption pool passes through a circulation pump, pipelines, and nozzles, making the alkaline solution present a mist state, thus constituting a cycle of the alkaline solution from the liquid state to the mist state and then back to the liquid state. At the same time, the concentration and pH of the alkaline solution can be adjusted in the absorption pool, which is very convenient to implement, so that the alkaline solution can always be in an effective state, facilitating the chemical reaction with the flue gas.

[0054] In the demisting area, the gas after being absorbed by the alkaline solution encounters the blockage of the quartz high-temperature carbonizer during the rising process, causing the decomposition reaction of the malodorous gas, excessive oxidant, and absorbent in the flue gas. The final flue gas undergoes dehydration and demisting and is discharged up to standard.

[0055] Steps of the engineering implementation method: ① Flue gas pressurization and turbulence, where the flue gas is pressurized and presented in a turbulent state. ② Oxidation reaction, the flue gas in the turbulent state passes through the misty oxidation liquid and the two are fully mixed for oxidation reaction. The misty oxidation liquid after the oxidation reaction naturally aggregates into droplets and is collected in the oxidation liquid pool. ③ Alkaline absorption and absorption, the flue gas after the oxidation reaction passes through the misty alkaline solution and the two are fully mixed for chemical reaction to complete the absorption by the alkaline absorbent. After the absorption by the alkaline absorbent, the misty alkaline solution after the alkaline absorption naturally aggregates into droplets and is collected in the alkaline solution pool.

[0056] The concentration and pH value of the oxidation liquid mentioned in this process are adjusted in the oxidation pool, and the concentration and pH of the alkaline solution are adjusted in the absorption pool.

[0057] The present invention makes full use of the guidance of atomized spraying and flow disturbing devices in the oxidation chamber and absorption chamber to fully wash the flue gas and remove fine particles below PM10 remaining in the soot. The dust removal process runs through the entire flue gas purification process. The main features of this technology are strong adaptability to fluctuations in the gas treatment volume, unique spraying and washing methods and equipment structures, flexible configurations, and a wide range of applications.

Claims

1. Comprehensive treatment system for printing and dyeing waste gas, Characterized in that: It includes an oxidation chamber, a connecting pipe, an absorption chamber and an emission tower connected in sequence from the air inlet end to the emission end; both the oxidation chamber and the absorption chamber are arranged horizontally, and the inlet of the oxidation chamber is connected to the waste gas source; the system also includes an oxidant spray pipe, an oxidation liquid spray pipe and an absorption spray pipe, and the oxidant spray pipe extends into the inlet of the oxidation chamber and is connected to an oxidant nozzle; the oxidation liquid spray pipe extends into the oxidation chamber and is connected to an oxidation liquid nozzle, and the absorption spray pipe extends into the absorption chamber and is connected to an absorption nozzle; an oxidation spiral body is connected in the oxidation chamber, and the oxidation spiral body is arranged on one side of the liquid outlet of the oxidant nozzle, and an absorption spiral body is connected in the absorption chamber; the oxidation spiral body and the absorption spiral body have the same structure, both including a spiral body, the diameter of the spiral body gradually increases from one end to the other end, and a support frame is connected in the spiral body; the spiral body is arranged horizontally, and the waste gas enters from the end with a larger diameter of the spiral body; the treatment system also includes an activator storage tank, an oxidant storage tank and an oxidant activation reaction tank; the activator storage tank is connected to the oxidant activation reaction tank through an activator delivery pump, a stirrer is connected in the oxidant storage tank, the oxidant storage tank is connected to an oxidant delivery pump, and the oxidant delivery pump, the compressed air delivery pipe and the tap water pipe are connected in parallel and then connected to the oxidant activation reaction tank, and the oxidant activation reaction tank is connected to the inlet of the oxidant spray pipe; the inlet of the oxidation liquid spray pipe is connected to an oxidation pool through an oxidation pump, and the oxidation chamber is connected to the oxidation pool through an oxidation return pipe; the treatment system also includes an operation platform, the operation platform includes a lower operation platform and an upper operation platform, the oxidation chamber and the absorption chamber are arranged vertically, the oxidation chamber is connected to the upper operation platform, and the absorption chamber is connected to the lower operation platform.

2. The comprehensive treatment system for printing and dyeing waste gas according to claim 1, Characterized in that: There are two oxidation pumps, the inlets of the two oxidation pumps are connected in parallel to the oxidation pool, and the outlets of the two oxidation pumps are connected in parallel to the oxidation liquid spray pipe.

3. The comprehensive treatment system for printing and dyeing waste gas according to claim 1, Characterized in that: The treatment system also includes an absorption pool, the inlet of the absorption spray pipe is connected to the absorption pool through an absorption pump, the inlet of the absorption pump is also connected to a medicine tank, and the absorption chamber is connected to the absorption pool through an absorption return pipe.

4. The comprehensive treatment system for printing and dyeing waste gas according to claim 3, Characterized in that: There are two absorption pumps, the inlets of the two absorption pumps are connected in parallel to the absorption pool, and the outlets of the two absorption pumps are connected in parallel to the absorption spray pipe.

5. The comprehensive treatment system for printing and dyeing waste gas according to claim 1, Characterized in that: in A quartz high-temperature carbonizer and a grille are connected in the emission tower. The quartz high-temperature carbonizer includes a quartz tube and a high-temperature heating layer on the surface of the quartz tube. The grille is located below the quartz high-temperature carbonizer, and a filler is arranged on the grille.

6. The comprehensive treatment system for printing and dyeing waste gas according to claim 1, Characterized in that: The inlet of the oxidation chamber is connected to an induced draft fan, and the inlet of the induced draft fan is connected to a cooling tower.

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