System and method for removing and purifying organic waste gas through storage-in-situ advanced oxidation circulation at room temperature

Abstract

The invention discloses a purification system and method for removing organic waste gas through storage-in-situ advanced oxidation circulation at room temperature, and belongs to the technical field of air pollution control. According to the system and the method, after organic waste gas is blown in by a fan, the gas firstly enters a cyclone dust collector for dust removal and then enters a first reaction tank and a second reaction tank for storage-advanced oxidation operation, and meanwhile, a gas concentration online monitor is linked with an intelligent dosing system through a control panel for dosing; the two reaction tanks are used for realizing normal-temperature catalytic oxidation to carry out storage-advanced oxidation operation on waste gas in turn, a bifunctional material is circularly eluted through an oxidizing agent for multiple times, complete cyclic degradation and removal of pollutants are realized, and the problems of low pollutant removal efficiency and low pollution are solved. The problems of high energy consumption, easy generation of secondary pollutants after combustion treatment, large occupied area and high operation cost are solved.

Description

Technical Field

[0001] The present application relates to a system and method for purifying organic waste gas by storage-in-situ advanced oxidation cycle removal at room temperature, belonging to the technical field of air pollution control. Background Art

[0002] In recent years, domestic researchers have developed some new organic waste gas treatment technologies and devices, but there are still certain defects.

[0003] The patent with publication number CN115751344A discloses a VOC organic waste gas treatment device and a VOC organic waste gas treatment method, the VOC organic waste gas treatment device includes a base, a shell and three heat storage bodies; the shell is provided with a combustion chamber and three heat storage chambers. However, this equipment is only for treating high-concentration VOCs and the combustion waste gas needs to use auxiliary fuel to maintain combustion, which has problems such as high energy consumption and increased operating costs. The patent with publication number CN 115751346A discloses an organic waste gas RCO heat storage catalytic incineration device, which mainly includes a catalytic incineration box, which is composed of a catalytic bed, an air expansion hood, and a dust removal filter. However, this treatment device and treatment method have the problems of short catalyst service life, easy deactivation of the catalyst, and easy generation of secondary pollutants such as dioxins after catalytic combustion of some chlorine-containing organic waste gases. The patent with publication number CN1428185A discloses a treatment device and method for VOC-containing organic waste gas. The main feature is the integration of oxidation technology and traditional wet scrubbing technology. The oxidant is brought into contact with the gas through elution, and the waste gas to be treated is absorbed by the circulating scrubbing liquid when passing through the wet scrubber. This method has the defects of short gas contact residence time and poor treatment effect for VOCs with large air volume. The patent with publication number CN105056700A discloses an organic waste gas VOC purification treatment system, including an adsorption zone, a desorption zone, a condensation recovery device, and a concentrator. The device has many equipment, a large footprint, a complex process, and high operation and maintenance costs. The pollutants are not decomposed after condensation recovery, and there is a problem of secondary transfer treatment after treatment.

[0004] In summary, there is an urgent need for an organic waste gas purification method with low energy consumption, small footprint, good treatment effect, high ecological benefit, and low production and operation costs. Summary of the invention

[0005] In order to solve at least one of the problems existing in the prior art of organic waste gas purification, namely, high energy consumption, poor pollutant treatment effect, large floor space, high operation and maintenance costs, and generation of toxic substances such as dioxins after treatment, the present application provides a system and method for organic waste gas purification by storage-in-situ advanced oxidation cycle at room temperature, which implements dual-function "storage-advanced oxidation" and does not require a combustion heating device. It directly performs catalytic oxidation reaction at room temperature, and uses two groups of catalytic reaction units to perform "storage-advanced oxidation" operation in turn, so that the pollutants are fully contacted with the oxidant. At the same time, the oxidant can circulate and wash the catalyst carriers in the two groups of catalytic reaction units to realize in-situ oxidation regeneration. The pollutants undergo gas-liquid mass transfer through the circulation system, and there are no secondary pollutants after treatment.

[0006] This application adopts the following technical solutions:

[0007] According to one aspect of the present application, a system for storage-in-situ advanced oxidation cycle removal and purification of organic waste gas at room temperature is provided, characterized in that it includes a fan 1, a cyclone dust collector 2, a first storage-oxidation reaction tank 9 and a second storage-oxidation reaction tank 10 connected in parallel, a liquid peristaltic pump 16, a reagent storage tank 17, a first circulation pump 18, a second circulation pump 19, an intelligent dosing system 21, a control panel 22, a VOCs concentration online monitor 23, an exhaust smoke pipe 24, and a liquid infusion pipeline 25;

[0008] The fan 1 includes an outlet and an inlet for discharging organic waste gas. The outlet of the fan 1 is connected to the inlet of the cyclone dust collector 2. The pollutant particles in the waste gas can be removed and the waste gas can be preliminarily purified. The fan 1 is connected to a VOCs concentration online monitor 23 for gas concentration detection. The VOCs concentration online monitor 23 is also electrically connected to the intelligent dosing system 21 through a control panel 22. The intelligent dosing system 21 includes a computing system, a tank control device and at least one tank for containing a reagent. At least one of the tanks is a tank for containing an oxidant solution. The tank is connected to the reagent storage tank 17 through a pipeline with an eleventh stop valve 20 and a second circulation pump 19. According to the concentration of the inlet pollutants monitored, the control panel 22 can be linked to the intelligent dosing system 21 to automatically calculate the amount of oxidant and / or dilute acid solution to be added, and the solution flows into the reagent storage tank 17 through the first circulation pump 18. The purpose of adding the dilute acid solution is to ensure that the pH is maintained between 3 and 7 during the advanced oxidation reaction to increase the degradation rate of the pollutants.

[0009] The bottoms of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are independently provided with a gas inlet end, a circulating liquid outlet end, and a waste liquid outlet end, respectively, and the tops of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are independently provided with a gas outlet end and a liquid inlet end, respectively; the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 can be operated in parallel, and "storage-advanced oxidation" can be performed alternately.

[0010] The gas inlet ends at the bottom of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are connected to the outlet end of the cyclone dust collector 2 through pipelines with the first stop valve 3 and the second stop valve 4 respectively; the organic waste gas passes through the cyclone dust collector 2 and then enters the first storage-oxidation reaction tank 9 and / or the second storage-oxidation reaction tank 10 to carry out the "adsorption-advanced oxidation" process. The gas outlet ends at the tops of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are connected to the inlet end of the exhaust smoke pipe 24 through pipelines with the eighth stop valve 12 and the seventh stop valve 11 respectively; the treated gas is directly discharged through the exhaust smoke pipe 24 without secondary treatment.

[0011] The liquid inlet ends at the top of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are respectively connected to parallel pipelines with the tenth stop valve 14 and the ninth stop valve 13, and after being connected in parallel, they are connected to the outlet end of the liquid peristaltic pump 16 through a pipeline with a twelfth stop valve 15, and the inlet end of the liquid peristaltic pump 16 is connected to the reagent storage tank 17; the circulating liquid outlet ends at the bottom of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are respectively connected to parallel pipelines with the sixth stop valve 8 and the fifth stop valve 7, and after being connected in parallel, they are connected to the reagent storage tank 17 through a pipeline with a first circulation pump 18; the recovered liquid formed after the oxidant flows through the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 to rinse the organic waste gas is refluxed to the reagent storage tank 17 through the first circulation pump 18, and then flows into the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 through the liquid peristaltic pump 16 to circulate, rinse, degrade and remove the organic waste gas. The waste liquid outlet ends at the bottom of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are respectively connected to the parallel pipelines of the third stop valve 5 and the fourth stop valve 6, and are connected in parallel to the liquid delivery pipeline 25 for discharging the waste liquid. - 、SO4 2- Once it meets the national emission standards, it can be directly discharged into the municipal pipeline network.

[0012] Optionally, the tank body in the intelligent dosing system 21 also includes at least one tank body for containing a dilute acid solution. The intelligent dosing system is equipped with two dosing storage tanks, one of which is filled with an oxidant solution, so that the reagent is replenished to the reagent storage pool in time during the reaction process, which is conducive to the advanced oxidation reaction. The other tank body is filled with a dilute acid solution, which can adjust the pH of the entire reaction system to maintain an acidic environment. In the present application, several tank bodies in the intelligent dosing system 21 can be connected to the reagent storage pool 17 through a pipeline with an eleventh stop valve 20 and a second circulation pump 19, or each tank body can be connected to the reagent storage pool 17 through an independent pipeline with a stop valve and a circulation pump.

[0013] Optionally, the method includes: purifying the organic waste gas using the above-mentioned system.

[0014] According to another aspect of the present application, a method for purifying organic waste gas by storage-in-situ advanced oxidation cycle at room temperature is provided, comprising purifying the organic waste gas by cyclic leaching:

[0015] The gas outlet and liquid inlet at the top of the first storage-oxidation reaction tank 9 and / or the second storage-oxidation reaction tank 10 and the circulating liquid outlet and waste liquid outlet at the bottom are closed by controlling the stop valve, and the gas inlet is opened, and the organic waste gas is passed into the cyclone dust collector 2 by the fan 1 and then into the first storage-oxidation reaction tank 9 and / or the second storage-oxidation reaction tank 10 loaded with adsorption material, so that the organic waste gas contacts the adsorption material and is adsorbed to saturation, and then the gas inlet at the bottom of the first storage-oxidation reaction tank 9 and / or the second storage-oxidation reaction tank 10 is controlled to be closed;

[0016] The liquid inlet at the top of the first storage-oxidation reaction tank 9 and / or the second storage-oxidation reaction tank 10 is opened by controlling the stop valve, and the reagent in the reagent storage tank 17 is passed into the first storage-oxidation reaction tank 9 and / or the second storage-oxidation reaction tank 10 by using the liquid peristaltic pump 16 to elute the adsorbed material to saturation, and then the circulating liquid outlet at the bottom of the first storage-oxidation reaction tank 9 and / or the second storage-oxidation reaction tank 10 is opened by controlling the stop valve, and the first circulating pump 18 is used to return the eluted reagent to the reagent storage tank 17, and then the stop valve, the liquid peristaltic pump 16, and the first circulating pump 18 are controlled to make the adsorbed material to saturation undergo multiple cycles of elution, and then the liquid inlet at the top and the circulating liquid outlet at the bottom of the first storage-oxidation reaction tank 9 and / or the second storage-oxidation reaction tank 10 are closed by controlling the stop valve; the reagent is an oxidant solution.

[0017] The circulating liquid washed out of the bifunctional catalyst in the first storage-oxidation reaction tank and the second storage-oxidation reaction tank is refluxed to the reagent storage tank by the circulation pump, and then enters the first storage-oxidation reaction tank and the second storage-oxidation reaction tank through the liquid peristaltic pump to form a circulation system, which can rinse the bifunctional catalyst material in the first storage-oxidation reaction tank and the second storage-oxidation reaction tank multiple times, cyclically degrade the pollutants, improve the pollutant removal efficiency, and realize the in-situ advanced oxidation regeneration of the bifunctional catalyst material. The liquid peristaltic pump can adjust the liquid flow rate, control the flow rate of the oxidant solution into the first storage-oxidation reaction tank and the second storage-oxidation reaction tank, and prevent the transition metal ions loaded on the porous adsorption material from leaching due to excessive impact of the liquid flow rate.

[0018] Optionally, the reagent includes an oxidant solution and a dilute acid solution;

[0019] The cyclic elution process also includes passing a dilute acid solution into the first storage-oxidation reaction tank 9 and / or the second storage-oxidation reaction tank 10 to contact the adsorption material. The dilute acid solution is used to adjust the pH of the entire reaction system to maintain an acidic environment and ensure efficient operation of the cyclic degradation reaction.

[0020] Optionally, the acidic solution is selected from at least one of dilute hydrochloric acid, dilute sulfuric acid, and dilute nitric acid.

[0021] Optionally, the adsorbent material is selected from at least one of transition metal-loaded zeolite molecular sieves, porous polymer resins, and activated carbon; or at least one of transition metal and transition metal oxide composite-loaded metal-organic framework materials MOF, porous carbon materials, and porous oxides. The transition metal is preferably selected from at least one of Fe, Mn, Cu, Co, and Ni.

[0022] In the circulating elution process of the present application, the technicians in this field can, according to the needs, add the oxidant and the dilute acid solution to the first storage-oxidation reaction tank and / or the second storage-oxidation reaction tank every 0.5h to 1h by controlling the stop valve and the circulation pump, and return the oxidant and the dilute acid solution to the reagent storage tank after elution, that is, intermittent introduction and reflux for circulating elution; or continuously introduce the oxidant and the dilute acid solution, that is, continuously introduce and reflux for circulating elution.

[0023] Optionally, the method further includes replenishing the medicine into the medicine storage pool 17:

[0024] The concentration of organic waste gas is monitored by using the VOCs concentration online monitor 23, and then the intelligent dosing system 21 is controlled by the control panel 22 to calculate the amount of reagent added, and then the eleventh stop valve 20 is opened and the second circulation pump 19 is used to pump the reagent in the tank for containing the reagent in the intelligent dosing system 21 into the reagent storage tank 17. The VOCs concentration online monitor and the intelligent dosing system are linked to match the required amount of oxidant added according to the VOCs intake volume and concentration, avoiding excessive addition of oxidant and saving the cost of using oxidant.

[0025] Optionally, the oxidant is selected from at least one of hydrogen peroxide (H2O2), calcium peroxide (CP), permonosulfate (PMS), sodium percarbonate (SPC), sodium persulfate (PS) and sulfate-based oxidants.

[0026] Optionally, it also includes exhaust gas and waste liquid discharge: the gas outlet end at the top and the waste liquid outlet end at the bottom of the first storage-oxidation reaction tank 9 and / or the second storage-oxidation reaction tank 10 are opened by controlling the shut-off valve, and the exhaust gas and waste liquid after circulating leaching and purification in the first storage-oxidation reaction tank 9 and / or the second storage-oxidation reaction tank 10 are discharged from the system through the exhaust smoke pipe 24 and the liquid delivery pipeline 25 respectively.

[0027] The beneficial effects of this application include:

[0028] The system and method for removing organic waste gas from storage-in-situ advanced oxidation cycle at room temperature provided by the present application can achieve the following technical effects: (1) by linking the VOCs concentration online monitor and the intelligent dosing system, the amount of oxidant required to be added is automatically calculated according to the reaction ratio of VOCs and oxidant, thereby avoiding excessive addition of oxidant and saving the cost of oxidant use; (2) by controlling each valve, the first storage-oxidation reaction tank and the second storage-oxidation reaction tank are operated in parallel, and a liquid peristaltic pump is used to adjust the flow rate of the oxidant pumped into the first storage-oxidation reaction tank and the second storage-oxidation reaction tank, thereby preventing the leaching of transition metal ions loaded on the catalyst material due to excessive impact of the liquid flow rate, and efficiently treating pollutants while reducing material losses; (3) the "storage-advanced oxidation" cycle designed by the present application The system enables the transition metal-coated adsorbent material to achieve cyclic conversion of different valence states between transition metal ions after multiple leaching, and realize multiple advanced oxidation processes without replacing or supplementing the catalytic material. At the same time, the transition metal coated by the catalytic material is cheaper than the precious metals loaded on the commonly used catalysts, which reduces the cost of catalyst use and replacement; (4) "Storage-Advanced Oxidation" is carried out alternately at room temperature, without the need for heating and combustion equipment, reducing the energy consumption of pollutant treatment, and is widely used in the field of industrial organic waste gas treatment and purification; (5) Compared with the "adsorption-desorption" treatment device, the device is simple, occupies a small area, does not require secondary transfer treatment, and can efficiently treat low-concentration, large-volume VOCs; (6) The treated gas and waste liquid meet the national emission standards, do not require secondary treatment, and have good ecological and environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a system schematic diagram of the method for removing organic waste gas based on storage-in-situ advanced oxidation cycle at room temperature in the present application, wherein the physical lines represent the connection lines between instruments.

[0030] Reference numerals

[0031] 1. Fan; 2. Cyclone dust collector; 3. First stop valve; 4. Second stop valve;

[0032] 5. The third stop valve; 6. The fourth stop valve; 7. The fifth stop valve;

[0033] 8. The sixth stop valve; 9. The first storage oxidation reaction tank;

[0034] 10. Second storage oxidation reaction tank; 11. Seventh stop valve; 12. Eighth stop valve;

[0035] 13. The ninth stop valve; 14. The tenth stop valve; 15. The twelfth stop valve;

[0036] 16. Liquid peristaltic pump; 17. Drug storage tank; 18. First circulation pump;

[0037] 19. Second circulation pump; 20. Eleventh stop valve; 21. Intelligent dosing system;

[0038] 22. Control panel; 23. VOCs concentration online monitor;

[0039] 24. Exhaust pipe; 25. Liquid infusion pipeline. DETAILED DESCRIPTION

[0040] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0041] Unless otherwise specified, the raw materials in the examples of this application were purchased through commercial channels.

[0042] Unless otherwise specified, conventional methods were used for testing and instrument settings were those recommended by the manufacturer.

[0043] Example 1

[0044] The system schematic diagram of the present application based on the storage-in-situ advanced oxidation cycle at room temperature to remove organic waste gas purification method is as follows Figure 1 As shown:

[0045] It includes a fan 1, a cyclone dust collector 2, a first storage-oxidation reaction tank 9 and a second storage-oxidation reaction tank 10 connected in parallel, a liquid peristaltic pump 16, a reagent storage tank 17, a first circulation pump 18, a second circulation pump 19, an intelligent dosing system 21, a control panel 22, a VOCs concentration online monitor 23, an exhaust smoke duct 24, and an infusion pipeline 25. The fan 1 includes an outlet and an inlet for discharging organic waste gas, and the outlet of the fan 1 is connected to the inlet of the cyclone dust collector 2; the fan 1 is connected to a VOCs concentration online monitor 23 for gas concentration detection, and the VOCs concentration online monitor 23 is also electrically connected to an intelligent dosing system 21 through a control panel 22. The intelligent dosing system 21 includes a computing system, a tank control device, and two tanks for containing reagents, one of which is a tank for containing an oxidant, and the other is a tank for containing a dilute acid solution, and the tank is connected to the reagent storage tank 17 through a pipeline with an eleventh stop valve 20 and a second circulation pump 19. The bottoms of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are independently provided with a gas inlet, a circulating liquid outlet, and a waste liquid outlet, and the tops of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are independently provided with a gas outlet and a liquid inlet. The gas inlet ends at the bottom of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are connected to the outlet end of the cyclone dust collector 2 through pipelines with the first stop valve 3 and the second stop valve 4 respectively; the gas outlet ends at the tops of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are connected to the inlet end of the exhaust smoke duct 24 through pipelines with the eighth stop valve 12 and the seventh stop valve 11 respectively. The liquid inlet ends at the top of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are respectively connected to the parallel pipelines with the tenth stop valve 14 and the ninth stop valve 13, and after being connected in parallel, they are connected to the outlet end of the liquid peristaltic pump 16 through the pipeline with the twelfth stop valve 15, and the inlet end of the liquid peristaltic pump 16 is connected to the reagent storage tank 17; the circulating liquid outlet ends at the bottom of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are respectively connected to the parallel pipelines of the sixth stop valve 8 and the fifth stop valve 7, and after being connected in parallel, they are connected to the reagent storage tank 17 through the pipeline with the first circulation pump 18; the waste liquid outlet ends at the bottom of the first storage-oxidation reaction tank 9 and the second storage-oxidation reaction tank 10 are respectively connected to the parallel pipelines of the third stop valve 5 and the fourth stop valve 6, and after being connected in parallel, they are connected to the infusion pipeline 25 for discharging waste liquid.

[0046] Method for purifying organic waste gas using the above-mentioned room temperature storage-in-situ advanced oxidation cycle to remove organic waste gas purification system:

[0047] The first stop valve and the second stop valve are switched alternately to form two parallel systems, which are respectively recorded as system 1 and system 2. When system 1 is running, the waste gas to be treated enters the cyclone dust collector 2 after passing through the fan 1 to capture and remove fine particles in the waste gas, and then the first stop valve 3 is opened. The waste gas is adsorbed and stored by the porous adsorption material loaded with transition metals or transition metals / transition metal oxides in the first storage-oxidation reaction tank 9, and the first stop valve 3 is closed after the adsorption is saturated. At the same time, the VOCs concentration online monitor 23 monitors the concentration of pollutants to be treated in real time, and the intelligent dosing system 21 is linked through the control panel 22, the eleventh stop valve 20 is opened, and the amount of oxidant added determined by the automatic program is pumped into the reagent storage tank 17 through the first circulation pump 18. After the dosing is completed, the eleventh stop valve 20 is closed, and the flow rate of the oxidant introduced into the first storage-oxidation reaction tank 9 by the liquid peristaltic pump 16 is adjusted. After the porous adsorption material in the first storage-oxidation reaction tank 9 is saturated with adsorption, the twelfth stop valve 15 and the tenth stop valve 14 are opened, and the oxidant solution is introduced to wash the adsorption-catalytic material. Open the sixth stop valve 8 to allow the oxidant washing liquid to flow back to the reagent storage tank 17 through the first circulation pump 18, and then flow into the first storage-oxidation reaction tank 9 through the liquid peristaltic pump 16, so as to repeatedly wash the filled porous adsorption material. After multiple cycles of treatment, close the sixth stop valve 8 and the tenth stop valve 14, and close the twelfth stop valve 15; open the eighth stop valve 12 and the third stop valve 5 to discharge the gas generated after treatment directly into the atmosphere through the exhaust smoke pipe 24, and the waste liquid after treatment is directly discharged into the municipal pipeline network through the infusion pipeline 25. When system 1 is in the process of performing multiple cycles of elution to achieve advanced oxidation, system 2 can be operated at the same time, the second stop valve 4 is opened to allow the waste gas to enter the second storage-oxidation reaction tank 10 for adsorption, the second stop valve 4 is closed after the second storage-oxidation reaction tank 10 of system 2 is saturated with adsorption, the twelfth stop valve 15 and the ninth stop valve 13 are opened, and the oxidant solution is added to the second storage-oxidation reaction tank 10 by means of a liquid peristaltic pump 16, so that the oxidant completely immerses the porous adsorption material, the fifth stop valve 7 is opened, and the elution liquid flows back to the reagent storage tank 17 through the first circulation pump 18, and then enters the second storage-oxidation reaction tank 10 through the liquid peristaltic pump 16, and after multiple cycles, the fifth stop valve 7 and the ninth stop valve 13 are closed, and the twelfth stop valve 15 is closed; the seventh stop valve 11 and the fourth stop valve 6 are opened, and the gas generated after treatment is directly discharged into the atmosphere through the exhaust smoke pipe 24, and the waste liquid after treatment is directly discharged into the municipal pipe network through the liquid infusion pipe 25. In summary, the present invention can realize the alternating operation of "adsorption-advanced oxidation" cycle, which can reduce energy consumption and save costs. In addition, when the system 1 or the system 2 in the present invention is operated in turn, the intelligent dosing system 21 can replenish the oxidant solution and the dilute acid solution to the first storage-oxidation reaction tank 9 or the second storage-oxidation reaction tank 10 to ensure the efficient operation of the cyclic degradation reaction.

[0048] In order to further understand the operation of the present invention, the present invention is described below in conjunction with some test examples:

[0049] The pollutant degradation efficiency = (the concentration of pollutant waste gas entering the fan - the emission concentration of exhaust gas from the exhaust pipe) / the concentration of pollutant waste gas entering the fan × 100%. Concentration refers to the VOCs concentration.

[0050] Test Example 1

[0051] The concentration of pollutant exhaust gas is 2000mg / m 3 , ventilation volume is 5000m 3 / h, the intelligent dosing system adds oxidant to the reagent storage tank, opens the first stop valve, closes the first stop valve after adsorption for 2h-3h, opens the tenth stop valve and the twelfth stop valve, sets the flow rate of the liquid peristaltic pump, pumps the oxidant solution into the first storage-oxidation reaction tank, and opens the sixth stop valve to allow the eluent to flow back to the reagent storage tank. The first storage-oxidation reaction tank begins to perform elution-advanced oxidation, and the second stop valve can be opened to allow the second storage-oxidation reaction tank to perform adsorption. The two reaction tanks alternately perform the "adsorption-advanced oxidation" operation, and the oxidant and dilute acid solution can be supplemented every 0.5h-1h. Among them, the system oxidant cycle oxidation time is 0.5h, and the pollutant degradation efficiency is 90% (Table 1).

[0052] Test cases 2 to 5

[0053] The operation steps are the same as those in Test Example 1, except that the system oxidant cycle oxidation time and pollutant degradation efficiency are shown in Table 1.

[0054] Table 1 Effect of cycle oxidation time on pollutant degradation efficiency

[0055] Test Case Cycle oxidation time / h Pollutant degradation efficiency % Test Example 1 0.5 90％ Test Example 2 1 93％ Test Example 3 1.5 99％ Test Example 4 2 97％ Test Example 5 3 70％

[0056] As shown in Table 1, the degradation efficiency is higher when the cyclic oxidation time is 1-2h, which is above 90%. The best cyclic oxidation time is 1.5h, and the degradation efficiency of pollutants is as high as 99%.

[0057] Test Example 6

[0058] The concentration of pollutant exhaust gas is 4000mg / m 3 , ventilation volume is 8000m 3 / h, the intelligent dosing system adds oxidant to the reagent storage tank, opens the first stop valve, closes the first stop valve after adsorption for 2h-3h, opens the tenth stop valve and the twelfth stop valve, sets the flow rate of the liquid peristaltic pump, pumps the oxidant solution into the first storage-oxidation reaction tank, and opens the sixth stop valve to allow the eluent to flow back to the reagent storage tank. The first storage-oxidation reaction tank begins to perform elution oxidation, and the second stop valve can be opened to allow the second storage-oxidation reaction tank to perform adsorption. The two reaction tanks alternately perform the "adsorption-advanced oxidation" operation, and the oxidant and dilute acid solution can be supplemented every 0.5h-1h. Among them, the concentration of the oxidant used is 10mM, and the pollutant degradation efficiency is 85% (Table 2).

[0059] Test cases 7 to 10

[0060] The operation steps are the same as those of Test Example 6, except that the concentration of the oxidant used and the pollutant degradation efficiency are shown in Table 2.

[0061] Table 2 Effect of oxidant concentration on pollutant degradation efficiency

[0062] Test Case Oxidant concentration / mM Pollutant degradation efficiency % Test Example 6 10 85％ Test Example 7 20 93％ Test Example 8 30 96％ Test Example 9 40 98％ Test Example 10 50 80％

[0063] As shown in Table 2, the oxidant concentration between 20-40 mM has a better degradation efficiency for pollutants, and the optimal oxidant concentration is 40 mM, with a pollutant removal efficiency of up to 98%.

[0064] Test Example 11

[0065] The concentration of pollutant exhaust gas is 6000mg / m 3 , ventilation volume is 8000m 3 / h, the intelligent dosing system adds oxidant to the reagent storage tank, opens the first stop valve, closes the first stop valve after adsorption for 2h-3h, opens the twelfth stop valve and the tenth stop valve, sets the flow rate of the liquid peristaltic pump, pumps the oxidant solution into the first storage-oxidation reaction tank, and opens the sixth stop valve to allow the eluent to flow back to the reagent storage tank. The first storage-oxidation reaction tank begins to perform elution oxidation, and the second stop valve can be opened to allow the second storage-oxidation reaction tank to perform adsorption. The two reaction tanks alternately perform the "adsorption-advanced oxidation" operation, and the oxidant and dilute acid solution can be supplemented every 0.5h-1h. The pH of the oxidation reaction of the circulation system is adjusted to 3, and the pollutant degradation efficiency is 99% (Table 3).

[0066] Test cases 12 to 15

[0067] The operation steps are the same as those of Test Example 11, wherein the pH of the oxidation reaction of the circulation system and the pollutant degradation efficiency are adjusted as shown in Table 3.

[0068] Table 3 Effect of pH on pollutant degradation efficiency

[0069] Test Case pH Pollutant degradation efficiency % Test Example 11 3 99％ Test Example 12 4 95％ Test Example 13 5 90％ Test Case 14 6 80％ Test Example 15 7 60％

[0070] As shown in Table 3, pH between 3 and 4 is the best advanced oxidation reaction condition, and when pH = 4, the degradation efficiency of pollutants is the highest, which can be as high as 99%.

[0071] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A system for storage at room temperature - in-situ advanced oxidation cycle to remove organic waste gas purification, characterized in that: It comprises a fan (1), a cyclone dust collector (2), a first storage-oxidation reaction tank (9) and a second storage-oxidation reaction tank (10) connected in parallel, a liquid peristaltic pump (16), a drug storage tank (17), a first circulation pump (18), a second circulation pump (19), an intelligent dosing system (21), a control panel (22), a VOCs concentration online monitor (23), an exhaust smoke pipe (24), and a liquid infusion pipeline (25); The fan (1) comprises an outlet end and an inlet end for discharging organic waste gas, and the outlet end of the fan (1) is connected to the inlet end of the cyclone dust collector (2); the fan (1) is connected to a VOCs concentration online monitor (23) for gas concentration detection, and the VOCs concentration online monitor (23) is also electrically connected to an intelligent dosing system (21) through a control panel (22); the intelligent dosing system (21) comprises a computing system, a tank control device and at least one tank for containing a medicine, at least one of the tanks is a tank for containing an oxidant solution, and the tank is connected to a medicine storage tank (17) through a pipeline with an eleventh stop valve (20) and a second circulation pump (19); The bottoms of the first storage-oxidation reaction tank (9) and the second storage-oxidation reaction tank (10) are independently provided with a gas inlet end, a circulating liquid outlet end, and a waste liquid outlet end, respectively, and the tops of the first storage-oxidation reaction tank (9) and the second storage-oxidation reaction tank (10) are independently provided with a gas outlet end and a liquid inlet end, respectively; The gas inlet ends at the bottom of the first storage-oxidation reaction tank (9) and the second storage-oxidation reaction tank (10) are connected to the outlet end of the cyclone dust collector (2) through pipelines with a first stop valve (3) and a second stop valve (4), respectively; the gas outlet ends at the top of the first storage-oxidation reaction tank (9) and the second storage-oxidation reaction tank (10) are connected to the inlet end of the exhaust smoke pipe (24) through pipelines with an eighth stop valve (12) and a seventh stop valve (11), respectively; The liquid inlet ends at the top of the first storage-oxidation reaction tank (9) and the second storage-oxidation reaction tank (10) are respectively connected to parallel pipelines with a tenth stop valve (14) and a ninth stop valve (13), and after being connected in parallel, they are connected to the outlet end of a liquid peristaltic pump (16) through a pipeline with a twelfth stop valve (15), and the inlet end of the liquid peristaltic pump (16) is connected to a medicine storage tank (17); the circulating liquid outlet ends at the bottom of the first storage-oxidation reaction tank (9) and the second storage-oxidation reaction tank (10) are respectively connected to parallel pipelines with a sixth stop valve (8) and a fifth stop valve (7), and after being connected in parallel, they are connected to the medicine storage tank (17) through a pipeline with a first circulation pump (18); the waste liquid outlet ends at the bottom of the first storage-oxidation reaction tank (9) and the second storage-oxidation reaction tank (10) are respectively connected to parallel pipelines with a third stop valve (5) and a fourth stop valve (6), and after being connected in parallel, they are connected to a liquid infusion pipeline (25) for discharging waste liquid.

2. The room temperature storage-in-situ advanced oxidation cycle removal and purification system for organic waste gas according to claim 1 is characterized in that: The tanks in the intelligent dosing system (21) further include at least one tank for containing a dilute acid solution.

3. A method for removing organic waste gas by storage-in-situ advanced oxidation cycle at room temperature, characterized in that: The method comprises: purifying organic waste gas using the system described in claim 1 or 2.

4. The method for removing organic waste gas by storage-in-situ advanced oxidation cycle at room temperature according to claim 3 is characterized in that: Including circulating leaching and purification of organic waste gas: The gas outlet and liquid inlet at the top and the circulating liquid outlet and waste liquid outlet at the bottom of the first storage-oxidation reaction tank (9) and / or the second storage-oxidation reaction tank (10) are closed by controlling the stop valve, and the gas inlet is opened, and the organic waste gas is passed into the cyclone dust collector (2) by using the fan (1) and then into the first storage-oxidation reaction tank (9) and / or the second storage-oxidation reaction tank (10) loaded with adsorption material, so that the organic waste gas contacts the adsorption material and is adsorbed to saturation, and then the gas inlet at the bottom of the first storage-oxidation reaction tank (9) and / or the second storage-oxidation reaction tank (10) is controlled to be closed; The liquid inlet at the top of the first storage-oxidation reaction tank (9) and / or the second storage-oxidation reaction tank (10) is opened by controlling the stop valve, and the agent in the agent storage tank (17) is passed into the first storage-oxidation reaction tank (9) and / or the second storage-oxidation reaction tank (10) by using the liquid peristaltic pump (16) to elute the adsorbed material adsorbed to saturation, and then the circulating liquid outlet at the bottom of the first storage-oxidation reaction tank (9) and / or the second storage-oxidation reaction tank (10) is opened by controlling the stop valve, and the first circulating pump (18) is used to return the eluted agent to the agent storage tank (17), and then the stop valve, the liquid peristaltic pump (16) and the first circulating pump (18) are controlled to make the adsorbed material adsorbed to saturation undergo multiple cycles of elutriation, and then the liquid inlet at the top and the circulating liquid outlet at the bottom of the first storage-oxidation reaction tank (9) and / or the second storage-oxidation reaction tank (10) are closed by controlling the stop valve; The reagent is an oxidant solution.

5. The method for removing organic waste gas by storage-in-situ advanced oxidation cycle at room temperature according to claim 4, characterized in that: The reagents include an oxidant solution and a dilute acid solution; The cyclic elution process also includes passing the dilute acid solution into the first storage-oxidation reaction tank (9) and / or the second storage-oxidation reaction tank (10) to contact with the adsorption material.

6. The method for removing organic waste gas by storage-in-situ advanced oxidation cycle at room temperature according to claim 5, characterized in that: The acidic solution is selected from at least one of dilute hydrochloric acid, dilute sulfuric acid, and dilute nitric acid.

7. The method for removing organic waste gas by storage-in-situ advanced oxidation cycle at room temperature according to claim 4, characterized in that: The adsorption material is selected from at least one of transition metal-loaded zeolite molecular sieves, porous polymer resins, and activated carbon; or at least one of transition metal and transition metal oxide composite-loaded metal-organic framework materials (MOF), porous carbon materials, and porous oxides.

8. The method for removing organic waste gas by storage-in-situ advanced oxidation cycle at room temperature according to claim 4, characterized in that: The method also includes replenishing the medicine into the medicine storage pool (17): The concentration of organic waste gas is monitored using an online VOCs concentration monitor (23), and then the intelligent dosing system (21) is controlled by a control panel (22) to calculate the amount of reagent added, and then the eleventh stop valve (20) is opened and the second circulation pump (19) is used to pump the reagent in the tank for containing the reagent in the intelligent dosing system (21) into the reagent storage tank (17).

9. The method for removing organic waste gas by storage-in-situ advanced oxidation cycle at room temperature according to claim 4, characterized in that: The oxidant is selected from at least one of hydrogen peroxide, calcium peroxide, peroxymonosulfate, sodium percarbonate, sodium persulfate and sulfate-based oxidants.

10. The method for removing organic waste gas by storage-in-situ advanced oxidation cycle at room temperature according to claim 4, characterized in that: Also includes exhaust and waste liquid emissions: The gas outlet end at the top and the waste liquid outlet end at the bottom of the first storage-oxidation reaction tank (9) and / or the second storage-oxidation reaction tank (10) are opened by controlling the stop valve, and the tail gas and waste liquid after circulating leaching and purification in the first storage-oxidation reaction tank (9) and / or the second storage-oxidation reaction tank (10) are discharged from the system through the exhaust smoke pipe (24) and the liquid delivery pipeline (25) respectively.

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