TW460312B - Method and apparatus of regenerative electrolysis/oxidation scrubber - Google Patents

Abstract

A novel treatment method and apparatus removing odors and VOCs waste gas from several sources such as those from leather manufacturing industry. The method and apparatus combines the electrolysis and oxidation technique into a scrubber. A waste gas containing odorous or/and organic compounds flows through a scrubber. The compounds are transferred into scrubbing liquid, e.g. water, and then oxidized by oxidants and electrons subsequently and/or simultaneously. The oxidant is regenerated by the electrolysis in situ in the scrubbing liquid. A novel control system is designed to control the chemical addition by monitoring pH and ORP. The present method and apparatus has few scaling problems, and low operational cost compared to traditional waste gas scrubbing/oxidation system.

Description

460312 V. Description of the invention (1) [Field of the invention] The present invention relates to a method and a device for integrating electrolytic oxidation technology into washing technology, which can effectively remove odor and / or organic waste gas. The invention is characterized in that the odor and / or organic matter in the exhaust gas are chemically oxidized and electrolytically oxidized 'in the washing tower and the electrolysis / oxidation tank, and the oxidizing agent is regenerated in the electrolysis process for the washing tower. [Background of the Invention] Traditional washing technology can be used to treat odor and / or organic waste gas, but it still has the following disadvantages in practical applications: 1. Large consumption of oxidant and high operating cost. 2. A large amount of oxidants need to be stored, and a large amount of wastewater will be generated, which will easily cause industrial safety and environmental problems. 3. When using industrial-grade inferior acid to treat waste gas containing HaS, it is easy to produce serious calcium and magnesium salt scaling problems. [Objective of the invention and detailed description of the present invention] Based on the disadvantages of the traditional washing technology described above, the purpose of the present invention is to provide an exhaust gas treatment method and a device thereof, so as to greatly reduce operating costs, and eliminate equipment fouling and industrial safety and environmental protection. And other issues. The invention also provides a control method capable of stably maintaining the high processing efficiency of the washing technology. The exhaust gas treatment method of the present invention includes the following steps: a. Incoming exhaust gas is introduced into the washing tower body (1), and is brought into gas-liquid contact with the washing liquid circulating to the washing column.

C: \ path \ 0424-4223 ~ E. Ptd i ~ 5 ~ I '----- 46031 2 V. Description of the invention (2) --- It is purified and discharged in the liquid. b. Some pollutants have been oxidized and decomposed in the above process, while pollutants with slower reaction rate will enter the electrolysis / oxidation tank with the washing liquid and continue to be oxidized (sodium hypoxia or hydrogen peroxide). ) Decomposed by chemical oxidation 9 or / and electrolytic oxidation. The electrolysis / oxidation tank includes a washing wastewater storage tank (6), an electrolytic tank (7), a regeneration washing liquid storage tank (8), and the like. c. In the electrolysis / oxidation tank described above, the consumed oxidant will be regenerated by electrolysis to increase the concentration 'for circulation to the washing tower body. As shown in Figure 1, the exhaust gas treatment device of the present invention includes: a. A device for providing gas-liquid contact between the exhaust gas and the washing liquid circulating to the washing tower, including a washing tower body (1), a concentrated water nozzle (2) , Filler (3), inlet (4) before exhaust gas treatment, outlet (5) after exhaust gas treatment, etc. Figure 1 shows the contact with the vertical washing tower and gas-liquid countercurrent flow. In fact, the washing tower body (1) can be designed in various forms, such as vertical or horizontal. The gas-liquid contact method can be countercurrent, Directional or lateral flow. The sprinkler (2) can also be replaced by other liquid distributors, such as V-shaped grooves and various overflow pipe grooves. b. Electrolysis / oxidation tank, including washing wastewater storage tank (6), electrolytic tank (Ό, regeneration washing liquid storage tank (8), cathode and anode electrode plate (11), etc.) The anode and cathode electrode plate is made of stainless steel, titanium, etc. The structure is used for electrolytic regeneration of hypochlorous acid and electrolytic oxidation pollutants. The energy required for electrolysis comes from the high voltage and low current DC power provided by the power supply. Its electrode plate is suitable for the circulating flow rate of the washing liquid. When the washing liquid When circulating to the electrolysis / oxidation tank, the pollutants with a slower reaction rate will continue to be decomposed by the oxidant in the tank by chemical oxidation or / and by the electrolytic oxidation provided by the cathode and anode electrode plates;

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Decompose and regenerate to increase the concentration for recycling and the oxidant consumed in it will be charged to the scrubber body. Yang Er == Go to the negative beta waste geographical monitoring system (1 6) in the electrolytic / oxidation tank, monitor and adjust the control of the washing water quality and water in the electrolytic / oxidation tank, and adjust the current and voltage intensity of the power supply (12) Control and the like can be performed by means of an exhaust gas treatment monitoring system (16). The exhaust gas treatment monitoring system includes a number of monitoring and control equipment, such as pH meter, ORP meter, liquid level meter to monitor the water quality and quantity of washing liquid, current, voltage meter to monitor the effect of electrolysis, etc. e. Dosing system (including brine, sodium hydroxide) system 14) and soft water (or pure water) supply system (15), provide the above solution to adjust the water quality of the washing liquid entering the electrolysis / oxidation tank. The washing bar body (1) can be integrated with the electrolysis / oxidation tanks (6) to (8) below as shown in the figure, or it can be constructed separately as two independent devices. After the exhaust gas treatment (5), the rear end of the outlet (5) may be installed with a second stage washing tower to remove the excess bleach taste. The windmill collecting the exhaust gas may be installed at the front end of the inlet (4) before the exhaust gas treatment, or at the rear end of the outlet (5) after the exhaust gas treatment, as appropriate. The present invention uses electrolysis to regenerate oxidants and decompose pollutants in an electrolysis / oxidation tank. The principle of the oxidant regeneration reaction procedure is explained as follows. Take hypochlorous acid produced by electrolysis of brine as an example. Na + and CT can be reduced or oxidized to Na and Cl2 respectively at the cathode and anode, where Na reacts quickly with 10 to form NaOH Then, NaOH reacts with Cl2 to produce hypogas acid.

C: \ path \ 0424-4223-E. Ptd Page 7 46〇312 V. Description of the invention (4) Cathode (-): 2 Na + (aq) + 2e ~ 2 Na (s) 2 Na (s) + 2 H20-2 NaOH (aq) + H2 (g) Anode (+): 2 Cl (aq) — Cl2 (g) + 2e-

The principle of Cl2 +2 NaOH — NaOCl + H20 and NaCl electrolysis and oxidant decomposition of pollutants are explained below. Taking the electrolytic oxidation destruction of sulfoxides as an example, alcohol (R0H) and thiol (RSH) products will be produced after electrolysis. Alcohols and thiols are finally decomposed into CO2, H20 and inorganic salts by oxidizing agents such as hypogas. + 2 R% R1 2 hr OIS + R1 2 hr 〇ls + R1 ten 2 hr 〇ls- R1 oxident

◦H R1 + r2S0H C〇2 + H20 + S〇4 * " + COOH R ^ R2 oxident, 2

R- | SH + R2〇H ......, Co 2 + H 2 0 S04 z + COOH In the odor and / or organic exhaust gas treated by the present invention, the odor component of the odorous exhaust gas Refers to nitrogen and sulfur elements in the molecular structure, which cause odors that are generally recognized, such as hydrogen sulfide, methyl mercaptan, ethyl mercaptan, dimethyl

C: \ path \ 0424-4223-E. Ptd stomach 8

4 δ Ο 3 Ί 5 'Explanation of the invention (5) Sulfides and similar sulfur-containing compounds' Nitrogen-containing ones such as ammonia, -amino and similar nitrogen-containing compounds. Volatile organic compounds / methylamines, organic compounds with vapor pressure above 0.1 romHg, such as atmospheric pressure aldehydes, alcohols, ketones, organic amidines, and aromatic humans The application fields of the invention include: " " ° 1. Treatment of hydrogen sulfide-containing waste gas in the leather industry wastewater pond. 2. Foul odor in feed plants (residues for food processing) 3. Other anaerobic biological treatment wastewater treatment tanks containing chlorine sulfide waste gas. 3. Treatment of odorous gases in urban sewage treatment plants and landfills. . I ί: Ϊ Treatment of waste gases such as hydrogen sulfide, mercaptans, amines, and ammonia. In the case of hydrogen sulfide, the amount of pollutants contained in the exhaust gas required for oxidizing hydrogen sulfide per gram is 4-9 grams, and the average operating current is 130-160 amps. In order to make the above-mentioned and other objectives of the present invention comprehensible, the following special comparison is made: The characteristics and advantages of the support can be described in more detail as follows: [Simplified description of the diagram] FIG. 1 is a schematic diagram of the regenerative electrolysis of the present invention. Fig. 2 shows the removal rate in the embodiment of the present invention. [Symbol description] The h2s of different inlet concentration range of the device of the oxidation washing system

Page 9 C: \ path \ 0424-4223-E. Ptd 460312 V. Description of the invention (6) 1 ~ washing tower body; 2 ~ ·: ϋ & ^ inlet; 5 ~ water outlet after exhaust gas treatment 3 ~ filler ~ tank before exhaust gas treatment; 8 ~ regeneration washing liquid storage tank. 〇 ': washing wastewater storage tank; 7 ~ electrolyte flowmeter; 1 anode cathode: washing liquid circulation pump: 1 0 ~ washing Dosing system: 15 ~ soft water (or pure ^ pole 12 ~ power supply; 13, 14 ~ reel. 1 7 #% / pure water) supply system; 16 ~ exhaust gas monitoring system, 17 waste washing liquid or dirty Mud drain. [Examples] The examples of the present invention are tested for hydrogen sulfide-containing waste gas in a leather industry wastewater treatment plant. The operating conditions of the equipment are: (A). The exhaust gas inlet air flow is 4CMM, and the concentration of hydrogen sulfide is in the range of 0 to 200 ppm. (B). Circulating flow of washing liquid 15 ~ 20 lpm; (C). Power supply provides DC power of 75 ~ 180 a, 5 ~ 10 V; (D). Control the pH of washing liquid entering the electrolytic tank above 8 (E) · During continuous testing, the on-site analysis items include: An online GC / FPD analysis of H2S concentration before and after a group of exhaust gas treatments every 3 minutes, and an on-line pH / ORP controller every 0.5-1 minutes to record a group of washing liquids in the exhaust gas The pH and 0RP values before and after the treatment 'analyze the effective gas concentration of a set of washing liquid before and after the exhaust gas treatment by titration every 15 minutes to 30 minutes' and record the voltage and current values output by the power supply of the electrolytic equipment. Table 1. Experimental test results

Page 10 C: \ path \ 0424-4223-E. Ptd 4 6 0 3: 3: Fifth, description of the invention (7) Experiment order cumulative fel (hi) H2s average far JL roll tea) leveling operation current (A) IfeS Ye Junshi Xu Quan.) Effective nitrogen consumption check / h2s removal of Dong (weight barrier ratio) Effective gas elimination check / H2S to Xu Dong (mole tb) 1 7 22.4 83 98 15.1 9.6 2 10 57.7 109 96 12.0 7.7 3 12 74.2 133 97 8.1 5.2 4 4.8 147.2 157 92 4.9 3.1 The above experimental test results are shown in Table 1. The average concentration and treatment efficiency before and after treatment for different ranges of intake air concentration are shown in Figure 2. Intake conditions from low concentration range to high concentration range can achieve treatment efficiency higher than 95%. And get the following results: a. Removing 1 mole of H2S will consume 3.1 to 9_6 moles of effective gas and 1.8 moles of NaOH ° b. If the power consumption is estimated, the average power consumption of removing 1 mole of H2S is 丨 .ikWhr . According to the above experimental results, if the operation is performed for 24 hours a day, for example, when treating an exhaust gas with a hydrogen sulfide concentration of 0.018 g / s (exhaust air volume of 200 CMM, hydrogen sulfide concentration of 4,000 port 111), the secondary gas The acid demand is 1.981 ^ / (1 & ah. The specifications of the electrolytic equipment that provides the aforementioned oxidants include: a. The anode plate area requires 7.5 to 17'5 m2 and b. A power supply of at least 7,500 to 17,500 amps can be provided Device.

4 6 0 3 V. Description of the invention (8) After washing the hydrogen sulfide-containing waste gas with a sub-gas acid cleaning solution, the following products may be produced (Bonnin, Odor and Deoder i za ti on in the environment, 1994): S3 '+ 4C10 ^ SO; '+ 4a ·

Bonnin pointed out that theoretically processing 1 mole of H2S would consume 4 moles of effective gas. Bonn in also used the mold chamber equipment to treat the exhaust gas containing HZS with a concentration of 5-10mg / m3 under the condition that the pH was controlled at 9. The experimental results can reach an I ^ S removal rate of more than 99.8%. The Hs of mole will consume 5.2 111〇16 (^ 12 and 5 111〇16 ^ 011). Table 1 experimental test results show that the consumption of oxidants in the four experiments has a tendency to decrease with the increase of the concentration of pollutants. From the results of the third experiment, it is known that the consumption of oxidant is equal to the consumption of the previous literature by adding the oxidant directly. The results of the fourth experiment show that its consumption of oxidant is much lower than that of the previous literature by adding the oxidant directly. The consumption of the experiment is much lower than the theoretical consumption of direct oxidant. The results of the fourth experiment show that under ideal operating conditions, the oxidant supplied by electrolytic regeneration is lower than the theoretical value, which proves that In addition to chemical oxidation, electrolysis also provides

Theoretically, each mole of electrons generated during the electrolytic process is oxidized to 1/2 of hypochlorous acid. Here the knife J is known from the experimental experience in the control of the entire exhaust gas treatment system.

4 6 0 ：; ^ V. Description of the invention (Q) • The change of ρΗ value in the electrolysis / oxidation tank just reflects the low quotient of the exhaust gas inflow concentration 'b. It is not appropriate to use 0RP as an indicator of the level of oxidant concentration. The values only have a linear relationship in the lower range of the osmotic agent concentration, the 0RP value does not change significantly at high concentrations, and the 0RP measurement value is susceptible to the " value. However, when the oxidant has been consumed in large quantities and supplemented insufficiently, the measured value of 0RP will decrease significantly. Therefore, the pH value can be used as the main control parameter for the operation of the electrolytic equipment, and the 〇Rp value is suitable as the secondary control parameter for auxiliary pH control. Either by direct replenishment of oxidant or by electrolytic regeneration of rhenium, ‘if monitoring and controlling the pH of the washing liquid before entering the electrolytic cell is fixed at 巳 巳,’ such as between 8 ~ 10. When the exhaust gas intake concentration is higher, the higher the frequency of this pH change, the more the alkali replenishment will be. At this time, you can increase the supply of direct replenishing oxidant or increase the current intensity of electrolytic regeneration. In a system that uses hypochlorous acid to treat hydrogen sulfide waste gas, the added alkali can first neutralize the hydrogen sulfide with acid and alkali (hydrogen sulfide on hydrogen) The ions are transferred to hydroxide ions to form water molecules. They are absorbed into the washing solution, and then oxidized to hyposulfite oxidants to form stable sulfate ions (negative divalent sulfur ions lose eight electrons and oxidize to positive hexavalent sulfur containing ions). Sulfate ion). Before entering the electrolytic cell, the ORP value of the washing solution has not changed significantly as ρΗ, but its ORP value will have a significant downward trend when the oxidant has been consumed in large quantities and cannot be replenished in a timely manner. The ORP control range is between ~ 900 mv 'and 70 ~ 900 mv is a more appropriate range. That is, when the measured value of ORP is less than 700 ~ 900 mv, the oxidant supply should be increased until the measured value of ORP rises. Therefore, in the actual plant exhaust gas treatment, the method of reducing the initial installation cost of the equipment is not to provide oxygen for the high concentration of Xiaojian, but only for the average concentration.

C: \ path \ 0424-4223-E. Ptd Page 13 4 6 0 31 V. Description of the invention (ίο) Design of chemical agents. Under the aforementioned conditions for providing oxidant, when the exhaust gas inlet concentration is high, the pollutants can be absorbed into the washing liquid by means of acid-base neutralization reaction. When the exhaust gas inlet concentration is low, the demand for oxidant is also relatively low. Low, so excess oxidant can be accumulated for high concentrations. This avoids high operating costs due to reduced electrolysis efficiency at high oxidant concentrations. In the present invention, a set of pH value sensors and emulsification reduction potential (〇RP) sensors are respectively installed before and after the washing solution passes through the electrolysis zone, and the pH and ORP of the washing solution before and after contact with the hydrogen sulfide-containing exhaust gas are compared. Change, as a control factor to maintain the stability and high processing efficiency of the integrated equipment; especially when it is used in the treatment of high concentration load and high concentration fluctuating hydrogen sulfide-containing waste gas, the above acid and base can be used to neutralize eight electron transfers The fast characteristic is to wash the hydrogen sulfide first by adding sodium hydroxide to adjust the pH value of the washing solution. Table 2 compares the cost of the secondary gas acid electrolytic regeneration wet scrubbing equipment with the traditional dosing wet scrubbing equipment, while processing the waste air with an air volume of 2000 CMM and an average H2S inflow concentration of 40 ppm. If industrial grade secondary gas is used, it will have to pay about 15 million yuan more for oxidant purchase cost each year. The electrolysis method costs 3 million more equipment costs than the dosing method, which is equivalent to the additional cost of purchasing the oxidant during the two-year operation of the dosing method, that is, the investment in the electrolytic equipment can be recovered in about two years. cost. Table 2. Cost comparison of washing technology

Page 14 C: \ path \ 0424-4223-E. Ptd A6031? V. Description of the invention (11) (Estimated by exhaust gas wind 200CMM, H2S concentration 40ppm) Secondary gas acid electrolysis it: type washing service It is suspected that the electric power of the county ’s soft preparation is 300 _ Γ4 None. The two-stage regulation covers 320 320 secret cost supply gas (Continent cost 108 267 Difficult cost 199 358) Although the present invention has been disclosed above in a preferred embodiment, However, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and retouches without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be regarded as the scope of the attached patent application. Defined shall prevail.

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Claims (1)

4¾ Ο 31 2 1. A regenerative electrolytic oxidation road cleaning system for odor and / or organic waste gas. Hoblie steps: (a) introducing waste gas into a washing tower-gas-liquid radon, oxidation reaction; performing intermediate with H-chemical cleaning solution (b) introducing the above washing waste liquid into an electrolysis / oxidation tank, The oxidizing agent that may not be decomposed by electrolytic oxidation and the electrolytic regeneration step (a) is supplied to the above-mentioned washing tower. 2. The method described in item 1 of the scope of patent application is vertical or horizontal. 3. The method of contact as described in item 1 of the scope of patent application is co-current, counter-current, or cross) ning. 4. The method described in item 丨 of the scope of the patent application is a sodium hypochlorite (NaOCl) solution or hydrogen peroxide solution. 5. The item in the scope of the patent application includes a set of mind films including anode and anode. Heart electrode plate, made of stainless steel or titanium 6. If the scope of the patent application is lj; the odor contained in the exhaust gas is a sub-method 7. If the scope of the patent application is item 6 ^ ^ Parts are selected from: hydrogen sulfide, thiol The methods described in ammonia, diamidoamine, methylamine grade ethyl mercaptan, di 8. Such as the group of patent application scope. Person > The method described in Shidi Λ $, where the washing tower is in which the gas-liquid is connected in which the oxidant is in which the electrolysis / oxygen is in the above-mentioned odorous sulfur element. 'Where the odor is a methyl sulfide, and wherein the organic compound contained in the above-mentioned organic mmHg exhaust gas is equivalent to% times', the above is one of the above. * 'At atmospheric pressure, the vapor pressure is 0.1 6. Scope of patent application 9. The method described in item 8 of the scope of patent application '* The remaining organic compounds are selected from: S-type, ethers, aldehydes, hydrazones, ketones, organic acids and aromatic compounds The group of people. … I 〇. The method described in item i of the scope of patent application ′ wherein the above waste: contains hydrogen sulfide pollutants. g II · According to the method described in item 10 of the scope of patent application, the secondary acid oxidant required for oxidizing hydrogen sulfide per gram is 4 „9 grams and the average operating current of the oxidation / electrolytic cell is 130 ~ 160 amperes. 1 2 · —A regenerative electrolytic oxidation washing system device suitable for treating odor and / or organic waste gas. The device includes: a device for providing gas-liquid contact between the waste gas and the washing liquid, including; a tower body and a A liquid distributor, so that the exhaust gas flowing through the washing tower is brought into gas-liquid contact with the oxidant-containing washing waves supplied by the liquid distributor; an electrolysis / oxidation tank, the washing waste liquid flowing out of the washing tower is introduced into the electrolysis / Oxidation tank, used to electrolytically oxidize pollutants that may not be decomposed, and electrolytically regenerate the oxidant for recycling to the above washing tower. * I 1 3. The device described in item 丨 2 of the scope of patent application, wherein the side washing tower The body is vertical or horizontal. — 14. The device according to item 12 of the scope of patent application, wherein the gas-liquid contact mode is co-current, reverse flow, or cross flow. 15. If the scope of patent application is item 12 The said means, wherein the liquid dispenser is a nozzle Lishui. .I6 · The apparatus according to item 12 of the scope of patent applications, wherein the oxidizing agent is sodium secondary gas (NaOCl) solution or a hydrogen peroxide solution. C: \ path \ 0424 ~ 4223 ~ E. Ptd page 17 460312__ VI. Patent application scope 17. The device described in item 12 of the patent application scope, whose oxidation tank contains a set of electrode plates including cathode and anode. 4Electrolysis / Composition. Tian stainless steel or titanium gold 18. The device as described in item 17 of the scope of patent application, further comprising a power supply for supplying energy to the anode and cathode plates of the electrolysis / oxidation tank for electrolysis. ° 19. The device according to item 12 of the scope of the patent application, wherein the electrolysis / oxidation tank includes a washing wastewater storage tank, an electrolytic tank, and a regeneration tank. 20 • The device according to item 19 of the scope of the patent application, wherein an overflow baffle is provided between the washing wastewater well, the electrolytic tank, and the regenerating washing liquid storage tank. 21 · The device as described in item 20 of the scope of the patent application, wherein the overflow baffle is arranged so that the hydraulic retention time of the washing waste liquid and the electrolysis / oxidation tank reaches 5 to 15 minutes = 1 22. If applied The device described in item 12 of the patent scope further includes an exhaust gas treatment monitoring system. 23. The device described in item 2 of the scope of patent application, which further includes a dosing system and a soft water supply system, which provide saline, sodium hydroxide and pure water to adjust the water quality of the washing liquid entering the electrolytic / oxidation tank. 24. The device according to item 12 of the scope of application for a patent, wherein the odorous components contained in the odorous exhaust gas are those containing nitrogen and sulfur elements in the molecular structure. 25. The device according to item 24 of the scope of the patent application, wherein the odor component is selected from: hydrogen sulfide 'methyl mercaptan, ethyl mercaptan, dimethyl sulfide, Page 18 C: \ path \ 0424-4223-E. Ptd 460312 VI. Scope of Patent Application Ammonia monomethylamine and methylamine are a group of tours. 26 * The device according to item 25 of the scope of application for a patent, wherein the organic compounds contained in the above-mentioned organic exhaust gas are at normal temperature and normal temperature, and the vapor pressure is above 0 ′ 1 mmHg. 27. According to item 26 in the scope of the patent application, the organic compound is selected from the group consisting of esters, ethers, aldehydes, alcohols, ketones, organic acids, and aromatic compounds. 28. The cracking as described in item 12 of the scope of the patent application, wherein the above-mentioned exhaust gas contains hydrogen sulfide pollutants. 29. The device described in item 28 of the scope of the patent application, wherein the secondary acid oxidant required for oxidizing hydrogen sulfide per gram is 4 to 9 grams' and the average operating current of the oxidation / electrolysis cell is 130 to 160 amps. 30. ~ A method to eliminate the problem of scaling of equipment 'includes:-a washing tank is provided in the washing system, so that the washing waste in the system can stay in the sink for a hydraulic retention time: its characteristics The overflow tank is provided with several overflow baffles, so that the washing liquid has sufficient hydraulic retention time to allow the formed magnesium salt precipitate to settle in the tank, so as to avoid the formation of other equipment in the system. Dirt problem. 31. The method according to item 30 of the scope of patent application, wherein the water tank is provided with 1 to 5 overflow baffles. 3 2. The method according to item 31 of the scope of patent application, wherein the hydraulic retention time is 5 to 15 minutes. 32. —A method for maintaining high processing efficiency of washing technology ’includes: C: \ path \ 0424-4223-E. Ptd page 1946031 2. The patent application Fanyuan controls the ρ value of the county washing liquid, QRP f prep / l 1 ^ ^ 丄 p (redox potential) value is in the set range As a reference for the increase and decrease of the supply of oxidant in the washing solution, the control method is as follows: (a) Monitor and control the pH value of the washing solution between 8 and 〖〇, when the pH is adjusted to increase the amount of acid or added , Increase the supply of oxidant; when the amount of acid or base adjusted to adjust the pH value is reduced, reduce the supply of oxidant; (b) monitor the 0RP value, when it is higher than 700 ~ 900mv, control in the aforementioned manner; when it is lower than 7 0 0 Increase the supply of oxidant at ~ 90 0mv. 33. The method according to item 32 of the scope of the patent application, wherein the position of the above-mentioned monitoring pH and RP value of the washing liquid is a water tank for containing the washing liquid required for the washing process. C: \ path \ 0424-4223-E. Ptd page 20 7 ^ ,. 7 ^ ,. VJiT 46031 2 Six 'patent application scope I. Regenerative electrolytic oxidation washing system method, suitable for treating odor and / or Organic waste gas The method includes the following steps: (a) introducing the waste gas into a washing tower for gas-liquid contact and oxidation reaction with an oxidant-containing washing liquid; (b) introducing the above washing waste liquid into an electrolysis / oxidation tank to Electrolysis, conversion of possible undecomposed pollutants, and oxidant consumed in the electrolytic regeneration step (&) for recycling to the above washing tower using D wherein the washing tower wherein the gas-liquid is connected to the oxidant wherein the electrolysis / oxygen 2. The method described in item 1 of the scope of patent application is vertical or team. 3. The method of contact as described in item 1 of the scope of patent application is co-current, counter-current, or cross-flow. 4. The method described in item 1 of the scope of patent application is a sodium hypochlorite (NaOCl) solution or hydrogen peroxide solution. 5. The method described in item 1 of the scope of patent application, the softening tank contains a set of electrodes including a cathode and an anode Plate made of stainless steel or titanium. Among them, the above-mentioned odor sulfur element. Where the odor is a sulfonium-based sulfide, where the above organic 6 is the method described in item 1 of the scope of patent application, the odor component contained in the exhaust gas is nitrogen in the molecular structure, 7. as described in item 6 of the scope of patent application The method is selected from the group consisting of hydrogen sulfide, methyl mercaptan, ethyl mercaptan, diamine, monomethylamine, and fluorenylamine. 8. The method described in item 1 of Shenyang Patent Fanyuan. Y, t, death, yes, ah The organic compounds contained in the exhaust gas are at room temperature and pressure, and the vapor pressure is above 0.1mmHg. 0424-4223-EF.ptd Page 16 11 ^ 6. Method for applying patent scope, wherein the organic alcohols, ketones, organic acids 9. The compound described in item 8 of the scope of patent application is selected from: esters Types, ethers, and aldehydes, in which the above-mentioned exhaust gas and aromatic compounds are a group. 10. The method as described in item 1 of the scope of patent application contains a hydrogen sulfide pollutant. 11 · The method described in the scope of the patent application, wherein the secondary acid oxidant required to oxidize each gram of hydrogen sulfide is 4 to 9 grams. The average operating current of the oxidation / electrolysis cell is 1 3 0 to 1 6 0 amps. 1 2. —A kind of device for regenerative electrolytic oxidation washing system, suitable for treating odor and / or organic waste gas. The device includes: — a device for gas-liquid contact between waste gas and washing liquid, including a washing tower body and a Liquid distributor, so that the exhaust gas flowing through the washing tower is brought into gas-liquid contact with the oxidant-containing washing liquid supplied by the liquid dispenser, an electrolysis / oxidation tank, and the waste washing liquid flowing out of the washing tower is introduced into the electrolysis In the / oxidation tank ', it is used to electrolytically oxidize the unresolved / defective materials and electrolytically regenerate the oxidant for recycling to the washing tower. 1 3 · The device according to item 12 of the scope of the patent application, wherein the washing tower body is vertical or horizontal. 14 * The device according to item 12 of the scope of the patent application, wherein the gas-liquid contact mode is co-current, counter-current, or cross-flow. 15. The device according to item 12 of the scope of patent application, wherein the liquid distributor is a sprinkler. 16. The device according to item 12 of the scope of the patent application, wherein the oxidizing agent is a sodium hypogas solution (NaOCl) solution or a hydrogen peroxide solution. 0424-4223-EF.ptd page 17 460312, the device described in the patent application scope oxidation 1 application patent scope item 12, wherein the electrolytic / metal structure contains-a group of electrode plates including cathode and anode, made of stainless steel or titanium Gold-Electricity is the device described in item 17 of the scope of the patent application, which further includes a `` supply '' to supply energy to the anode / electrolytic erosion plate of the electrolysis / oxidation tank. effect. 19 * The device according to item 12 of the scope of the patent application, wherein the electrolysis / oxidation tank λ ... is a washing wastewater storage tank, an electrolytic tank, and a regenerating washing liquid storage tank. 2 〇 The device according to item 19 of the scope of the patent application, wherein an overflow baffle is provided between the washing water storage tank, the electrolytic tank, and the regeneration washing liquid storage tank. 2 1. The device as described in item 20 of the scope of patent application, wherein the overflow baffle is arranged so that the hydraulic retention time of the washing waste liquid and the electrolysis / oxidation tank reaches 5 to 15 minutes. 22. The device according to item 12 of the patent application scope, further comprising an exhaust gas treatment monitoring system. 2 3 · The device described in item 12 of the scope of patent application, which further includes a dosing system and soft water supply system, which provide saline, sodium hydroxide and pure water to adjust the water quality of the washing liquid entering the electrolytic / oxidation tank. . 24. The device according to item 12 of the scope of the patent application, wherein the odorous components contained in the odorous exhaust gas are those containing nitrogen and sulfur elements in the molecular structure. 25. The device according to item 24 of the scope of the patent application, wherein the odor component is selected from the group consisting of hydrogen sulfide, methyl mercaptan, 6 alcohol, dimethyl sulfide, 0424-4223-EF.ptd Page 18 460312 6. Scope of Patent Application. The group consisting of gas, difluorenylamine and fluorenylamine. 26. The device according to item 25 of the scope of application for a patent, wherein the organic compounds contained in the organic exhaust gas are at room temperature and pressure, and the vapor pressure is above ^ 0.1 mmHg. 27. The device as described in claim 26, wherein the organic compound is selected from the group consisting of esters, ethers, aldehydes, alcohols, organic compounds, and aromatic compounds. Second 2 8. The device according to item 2 of the scope of the patent application, wherein the exhaust gas contains hydrogen sulfide pollutants. 2 9. The device according to item 28 of the scope of the patent application, wherein the secondary acid oxidant required for oxidizing hydrogen sulfide per gram is [9 grams, and the average operating current of the oxidation / electrolysis cell is 1 3 0 to 1 6 0 ampere. 3 0. A method for eliminating the problem of scaling of equipment, including: setting a water tank for washing liquid in a washing system, so that the washing waste liquid in the system can stay in the water tank for a hydraulic retention time; its characteristics The overflow tank is provided with several overflow baffles, so that the washing liquid has sufficient hydraulic retention time so that the precipitates of the calcium and magnesium salts that have formed can be deposited in the tank to avoid the formation of other equipment in the system. Dirt problem. 31. The method as described in item 30 of the scope of patent application, wherein the water tank is provided with 5 overflow baffles. 32. The method according to item 31 of the scope of patent application, wherein the hydraulic retention time is 5 to 15 minutes. 33. —A method for maintaining high treatment rate of washing technology ’includes: 0424-4223-EF.ptd Page 19 Control the pH value of the washing liquid, ORP (redox potential) value within the set range, as a reference for the increase and decrease of the oxidant supply in the washing liquid, the control method is as follows: VIII> (a) monitor and control the pH value of the washing liquid Between 8 and 10, when the amount of acid or base added to adjust the pH is increased, the oxidant supply is increased; when the amount of acid or base adjusted to adjust the pH is decreased, the oxidant supply is reduced; (b) monitoring the 0RP value When it is higher than 700 ~ 900mv, it is controlled in the aforementioned manner; when it is lower than 700 ~ 900mv, the oxidant supply is increased. 34. The method according to item 33 of the scope of the patent application, wherein the above-mentioned position for monitoring the pH value and the ORP value of the washing liquid is a water tank for containing the washing liquid required for the washing process. 0424-4223-EF.ptd Page 20