CN113083016A - Regeneration process of ineffective complexing denitration agent - Google Patents
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- CN113083016A CN113083016A CN202110394392.4A CN202110394392A CN113083016A CN 113083016 A CN113083016 A CN 113083016A CN 202110394392 A CN202110394392 A CN 202110394392A CN 113083016 A CN113083016 A CN 113083016A
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- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
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- B01D53/8625—Nitrogen oxides
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Abstract
The invention discloses a regeneration process of a spent complexing denitration agent, which belongs to the technical field of denitration agents, can optimize a photocatalytic regeneration process, and utilizes Fe2(C2O4)3 solution to regenerate spent Fe (II) EDTA complexing liquid in a manner of adding auxiliary regeneration balls, forces the auxiliary regeneration balls to fully act in a photocatalytic system based on a magnetic stirring manner, slowly releases hydrogen peroxide solution in the photocatalytic system based on a centrifugal effect, then generates oxygen to be orderly released into the system under the catalytic action, can oxidize Fe (II) EDTA to relatively increase the Fe3+ concentration in the solution, is favorable for improving the generation of-OH in the system, is further favorable for the regeneration of the complexing liquid, can control the oxygen concentration by controlling the rotating speed of the auxiliary regeneration balls, and can play a role of micro stirring in the process of releasing the oxygen, and the reflection effect of the regeneration-assisting ball on illumination is promoted, so that the photocatalysis effect and the regeneration rate of the complexing denitration agent are comprehensively improved.
Description
Technical Field
The invention relates to the technical field of denitration agents, in particular to a regeneration process of a spent complexing denitration agent.
Background
The importance of the process of removing nitrogen oxides from combustion fumes to prevent environmental pollution has been pointed out as a worldwide problem. The mainstream process in the world comprises the following steps: SCR and SNCR. These two processes are not very different except that the reaction temperature is lower than SNCR due to the use of catalyst for SCR, but the SCR investment is at least several times, even more than 10 times, the SNCR investment if both from the point of view of construction costs and operating costs.
Nitrogen oxides are a main pollutant causing air pollution, can form photochemical smog, damage the ozone layer, cause acid rain and cause greenhouse effect, and cause great harm to human health and natural environment. Currently, technologies for controlling NOx emissions are largely classified into two types, low NOx combustion technologies and post-combustion NOx control technologies. The Fe (II) EDTA complex absorption method has the advantages of high absorption rate, large complex capacity, low requirement on temperature and the like, and is widely concerned by people, but in the process of complexing and absorbing NO by Fe (II) EDTA complex solution, Fe (II) EDTA is easily oxidized into Fe (III) EDTA by O2 in smoke, so that the capability of complexing and absorbing NO by the complex solution is gradually reduced, and the industrial application of the complex solution is limited. Therefore, it is difficult to maintain a high NO removal rate for a long time by simply using Fe (II) EDTA complex solution to absorb NO, and in order to maintain a high and long-term NO removal rate and the continuity of the process, Fe (III) EDTA and Fe (II) EDTA-NO oxidized into Fe (III) EDTA and Fe (II) EDTA-NO should be timely reduced, so that the regeneration problem of Fe (II) EDTA becomes a hot spot of domestic and foreign research.
At present, aiming at the problems of poor regeneration effect and low efficiency of the regeneration of Fe (II) EDTA, the traditional photocatalytic regeneration mode is difficult to effectively realize sufficient reaction due to complex components in the solution and weak transmittance, and the regeneration rate is low.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a regeneration process of a spent complexing denitration agent, which can be used for regenerating spent Fe (II) EDTA complexing liquid by optimizing a photocatalytic regeneration process and adding a regeneration-assisting ball, wherein the spent Fe (II) EDTA complexing liquid is regenerated by using Fe2(C2O4)3 solution, the regeneration-assisting ball is forced to fully act in a photocatalytic system based on a magnetic stirring mode, hydrogen peroxide solution is slowly released in the photocatalytic system based on a centrifugal effect, then oxygen is orderly released into the system under the catalytic action, the oxygen can oxidize Fe (II) EDTA to relatively increase the concentration of Fe3+ in the solution, the generation of-OH in the system is favorably improved, the regeneration of the complexing liquid is favorably realized, the oxygen concentration can be controlled by controlling the rotating speed of the regeneration-assisting ball, and the micro-stirring effect can be realized in the process of releasing oxygen, and the reflection effect of the regeneration-assisting ball on illumination is promoted, so that the photocatalysis effect and the regeneration rate of the complexing denitration agent are comprehensively improved.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A regeneration process of a spent complexing denitration agent comprises the following steps:
s1, placing the invalid complex denitration agent in a photocatalytic system, and then adjusting the pH value to 5.3;
s2, uniformly mixing a Fe2(C2O4)3 solution with the concentration of 0.001mol/L with a complexing denitration agent, and adding a plurality of regeneration-assisting balls;
s3, placing a light source above the photocatalytic system, and applying a rotating uniform magnetic field to force the regeneration-assisting balls to stir so as to release oxygen and improve the photocatalytic effect;
s4, the photocatalytic regeneration reaction in the photocatalytic system lasts for 50-70min, and the regeneration-assisting balls are recovered after the reaction is finished.
Furthermore, the complexing denitration agent is Fe (II) EDTA with the concentration of 0.01mol/L, the initial pH is adjusted by dilute H2SO4 or NaOH, and unnecessary components are not introduced to interfere the regeneration reaction of the photocatalytic system as far as possible.
Further, the Fe2(C2O4)3 solution is prepared by compounding Na2CO4, FeSO4 and 3:1 in proportion, and the concentration of each solution is 0.06 mol/L and 0.02 mol/L.
Further, in the step S3, the heating is carried out by adopting a constant-temperature oil bath, and the heating temperature is 45-55 ℃.
Further, the light source in step S3 is an ultraviolet high-pressure mercury lamp with 175W power, and the wavelength is 365 nm.
Further, in the step S3, the oxygen concentration in the photocatalytic system is 2% to 5%, and if the oxygen concentration is too high, more Fe (ii) EDTA is oxidized into Fe (iii) EDTA without denitration ability, and the oxygen with a reasonable concentration can relatively increase the concentration of Fe3+ in the solution, which is beneficial to improving the generation of-OH in the system, and further beneficial to the regeneration of the complexing solution, shows a positive synergistic effect, and eliminates the influence on the complexing absorption to a certain extent.
Furthermore, the regeneration assisting ball comprises a suspension hemisphere, a magnetic hemisphere and a liquid storage sleeve filled with hydrogen peroxide solution, the suspension hemisphere and the magnetic hemisphere are connected in an up-down symmetrical manner, the liquid storage sleeve is connected to the inner side between the suspension hemisphere and the magnetic hemisphere, a vertically arranged positioning wire is connected to the inner end of the liquid storage sleeve, a plurality of centrifugal sealing blocks distributed along the positioning wire in an annular array manner are movably embedded on the liquid storage sleeve, a plurality of inner elastic wires are connected between the centrifugal sealing blocks and the positioning wire, a plurality of uniformly distributed oxygen control reflecting microspheres are embedded and connected on the suspension hemisphere and the magnetic hemisphere, a liquid guide wire is connected between the oxygen control reflecting microspheres, the regeneration assisting ball can rotate when being acted by a rotating magnetic field, and when in macroscopic stirring, the centrifugal sealing blocks are utilized to separate from the liquid storage sleeve, so that the hydrogen peroxide solution in the liquid storage sleeve is released, the oxygen-controlled reflecting microspheres are in contact with the liquid guide wires in a guided conveying manner, rapidly decompose and release oxygen under the catalytic action of the oxygen-controlled reflecting microspheres, and are released into a photocatalytic system through the oxygen-controlled reflecting microspheres, so that the oxygen-controlled reflecting microspheres are regenerated in cooperation with photocatalysis on one hand, and can be stirred in a micro mode on the other hand to improve the light transmittance of local areas, and the photocatalytic effect is improved.
Furthermore, the oxygen-controlling reflecting microsphere comprises a hollow reflecting hemisphere, a porous catalytic hemisphere and a waterproof breathable film, the hollow reflecting hemisphere is symmetrically connected with the porous catalytic hemisphere, the hollow reflecting hemisphere is positioned outside relative to the porous catalytic hemisphere, the waterproof breathable film is coated on the outer surface of the hollow reflecting hemisphere, a plurality of uniformly distributed action holes are formed in the hollow reflecting hemisphere, matched reflecting dynamic balls are movably embedded in the action holes and positioned between the hollow reflecting hemisphere and the waterproof breathable film, an external elastic wire is connected between the reflecting dynamic balls and the porous catalytic hemisphere, the hollow reflecting hemisphere can play a role in reflecting light, so that the illumination effect in the photocatalytic system is improved, the action holes are plugged by the reflecting dynamic balls under a normal state, and the reflecting dynamic balls are extruded to be separated after oxygen generates a certain amount, then, the water-proof breathable film is released into the system, so that the release of oxygen is controlled, the over-high oxygen concentration is avoided, meanwhile, the light reflection effect is further improved by utilizing the mobility of the light reflection movable ball when the light reflection movable ball is separated from the action hole, the probability of full coverage in the system is improved, and the light catalysis effect is not easy to occur due to the dead angle of light illumination.
Furthermore, the suspension hemisphere is made of a light material, the magnetic hemisphere is made of a ferromagnetic material, and the whole weight of the magnetic hemisphere area is larger than that of the suspension hemisphere area, so that the regeneration assisting ball can play a role in a reasonable posture in the photocatalytic system, and the action of assisting regeneration can be triggered by effectively utilizing centrifugal force.
Furthermore, hollow reflection of light hemisphere and reflection of light movable ball all adopt high reflectivity material to make, porous catalysis hemisphere adopts manganese dioxide to make porous structure, utilizes the fixed reflection of hollow reflection of light hemisphere and the activity reflection of light movable ball, realizes promoting the illumination distribution condition in the photocatalysis system jointly, and the manganese dioxide of porous structure can fully contact with hydrogen peroxide solution, and the gas that decomposes the production also can enter into hollow reflection of light movable ball and release.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) the scheme can be used for regenerating the invalid Fe (II) EDTA complex solution by optimizing the photocatalytic regeneration process and using the Fe2(C2O4)3 solution in a mode of adding the regeneration-assisting balls, forcing the regeneration-assisting balls to fully act in the photocatalytic system based on a magnetic stirring mode and slowly releasing the hydrogen peroxide solution in the photocatalytic system based on a centrifugal effect, then oxygen is orderly released into the system under the catalytic action, the oxygen can oxidize Fe (II) EDTA to relatively increase the concentration of Fe3+ in the solution, which is beneficial to improving the generation of-OH in the system, thereby helping the regeneration of the complexing liquid and controlling the oxygen concentration by controlling the rotating speed of the regeneration-assisting ball, the device can play a role in micro-stirring in the process of releasing oxygen and promote the reflection of the regeneration assisting ball to illumination, thereby comprehensively improving the photocatalysis effect and the regeneration rate of the complex denitration agent.
(2) The oxygen concentration in the photocatalytic system is 2% -5%, more Fe (II) EDTA can be oxidized into Fe (III) EDTA without denitration ability when the oxygen concentration is too high, the oxygen with reasonable concentration can relatively increase the concentration of Fe3+ in the solution, the generation of-OH in the system is favorably improved, the regeneration of complexing liquid is further facilitated, the positive synergistic effect is shown, and the influence on complexing absorption is eliminated to a certain extent.
(3) The regeneration assisting ball comprises a suspension hemisphere, a magnetic hemisphere and a liquid storage sleeve filled with hydrogen peroxide solution, the suspension hemisphere and the magnetic hemisphere are symmetrically connected from top to bottom, the liquid storage sleeve is connected to the inner side between the suspension hemisphere and the magnetic hemisphere, the inner end of the liquid storage sleeve is connected with a vertically arranged positioning wire, a plurality of centrifugal sealing blocks distributed along the positioning wire in an annular array mode are movably embedded in the liquid storage sleeve, a plurality of inner elastic wires are connected between the centrifugal sealing blocks and the positioning wire, a plurality of uniformly distributed oxygen control reflecting microspheres are embedded and connected on the suspension hemisphere and the magnetic hemisphere, a liquid guide wire is connected between the oxygen control reflecting microspheres, the regeneration assisting ball can rotate under the action of a rotating magnetic field, the liquid storage sleeve is separated by the centrifugal force applied to the centrifugal sealing blocks during macroscopic stirring, the hydrogen peroxide solution in the liquid storage sleeve is released and is in contact with the oxygen control reflecting microspheres through guiding and conveying of the liquid guide wire, oxygen is rapidly decomposed and released under the catalytic action of the oxygen-control reflecting microspheres and is released to a photocatalytic system through the oxygen-control reflecting microspheres, on one hand, the oxygen-control reflecting microspheres cooperate with photocatalysis to regenerate, on the other hand, micro stirring can be carried out to improve the light transmittance of a local area, and therefore the photocatalytic effect is improved.
(4) The oxygen-controlling reflecting microsphere comprises a hollow reflecting hemisphere, a porous catalytic hemisphere and a waterproof breathable film, wherein the hollow reflecting hemisphere is symmetrically connected with the porous catalytic hemisphere, the hollow reflecting hemisphere is positioned at the outer side relative to the porous catalytic hemisphere, the waterproof breathable film is coated on the outer surface of the hollow reflecting hemisphere, a plurality of uniformly distributed action holes are formed in the hollow reflecting hemisphere, matched reflecting movable balls are movably embedded in the action holes and positioned between the hollow reflecting hemisphere and the waterproof breathable film, outer elastic wires are connected between the reflecting movable balls and the porous catalytic hemisphere, the hollow reflecting hemisphere can play a role in reflecting light, so that the illumination effect in a photocatalytic system is improved, the action holes are plugged by the reflecting movable balls under a normal state, the reflecting movable balls are extruded to be separated after a certain amount of oxygen is generated, and then the oxygen is released into the system through the waterproof breathable film, the device is not only beneficial to controlling the release of oxygen and avoiding the over-high concentration of oxygen, but also further improves the reflection effect on illumination by utilizing the mobility of the reflective movable ball when the reflective movable ball is separated from the action hole, improves the probability of full coverage in a system, and is not easy to cause common photocatalysis effect due to illumination dead angles.
(5) The suspension hemisphere is made of light materials, the magnetic hemisphere is made of ferromagnetic materials, and the whole weight of the magnetic hemisphere area is larger than that of the suspension hemisphere area, so that the regeneration assisting ball can play a role in a reasonable posture in the photocatalysis system, and the action of assisting regeneration can be triggered by effectively utilizing centrifugal force.
(6) The hollow light-reflecting hemisphere and the light-reflecting movable ball are both made of high-reflectivity materials, the porous catalytic hemisphere is of a porous structure made of manganese dioxide, the light distribution condition in the photocatalytic system is jointly improved by utilizing the fixed reflection of the hollow light-reflecting hemisphere and the movable reflection of the light-reflecting movable ball, the manganese dioxide of the porous structure can be fully contacted with a hydrogen peroxide solution, and gas generated by decomposition can also enter the hollow light-reflecting hemisphere to be released.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic diagram of the structure of the photocatalytic system of the present invention;
FIG. 3 is a schematic structural diagram of a regeneration-assisting ball according to the present invention;
FIG. 4 is a schematic structural diagram of the oxygen-controlling reflective microsphere of the present invention.
The reference numbers in the figures illustrate:
1 suspended hemisphere, 2 magnetic hemispheres, 3 liquid storage sleeves, 4 positioning wires, 5 centrifugal sealing blocks, 6 internal elastic wires, 7 liquid guide wires, 8 oxygen-controlled reflecting microspheres, 81 hollow reflecting hemispheres, 82 porous catalytic hemispheres, 83 waterproof breathable films, 9 reflecting movable balls and 10 external elastic wires.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-2, a regeneration process of a spent complex denitration agent includes the following steps:
s1, placing the invalid complex denitration agent in a photocatalytic system, and then adjusting the pH value to 5.3;
s2, uniformly mixing a Fe2(C2O4)3 solution with the concentration of 0.001mol/L with a complexing denitration agent, and adding a plurality of regeneration-assisting balls;
s3, placing a light source above the photocatalytic system, and applying a rotating uniform magnetic field to force the regeneration-assisting balls to stir so as to release oxygen and improve the photocatalytic effect;
s4, the photocatalytic regeneration reaction in the photocatalytic system lasts for 50-70min, and the regeneration-assisting balls are recovered after the reaction is finished.
The complexing denitration agent is Fe (II) EDTA with the concentration of 0.01mol/L, the initial pH is adjusted by dilute H2SO4 or NaOH, and unnecessary components are not introduced to interfere the regeneration reaction of the photocatalytic system as far as possible.
The Fe2(C2O4)3 solution is prepared by compounding Na2CO4 and FeSO4 which are 3:1 according to the proportion, and the concentration of each solution is 0.06 mol/L and 0.02mol/L respectively.
In step S3, the heating is carried out in an oil bath with a constant temperature oil bath, and the heating temperature is 45-55 ℃.
The light source in step S3 was an ultraviolet high-pressure mercury lamp of 175W power, and the wavelength was 365 nm.
In the step S3, the oxygen concentration in the photocatalytic system is 2% -5%, more Fe (II) EDTA is oxidized into Fe (III) EDTA without denitration ability when the oxygen concentration is too high, and the oxygen with reasonable concentration can relatively increase the concentration of Fe3+ in the solution, which is beneficial to improving the generation of-OH in the system, thereby being beneficial to the regeneration of complexing liquid, showing positive synergistic effect, and eliminating the influence on complexing absorption to a certain extent.
Referring to fig. 3, the regeneration assisting ball includes a suspension hemisphere 1, a magnetic hemisphere 2 and a liquid storage sleeve 3 filled with hydrogen peroxide solution, the suspension hemisphere 1 and the magnetic hemisphere 2 are connected up and down symmetrically, the liquid storage sleeve 3 is connected to the inner side between the suspension hemisphere 1 and the magnetic hemisphere 2, the inner end of the liquid storage sleeve 3 is connected with a vertically arranged positioning wire 4, a plurality of centrifugal sealing blocks 5 distributed along the positioning wire 4 in an annular array are movably embedded on the liquid storage sleeve 3, a plurality of inner elastic wires 6 are connected between the centrifugal sealing blocks 5 and the positioning wire 4, a plurality of uniformly distributed oxygen-controlled reflecting microspheres 8 are embedded on the suspension hemisphere 1 and the magnetic hemisphere 2, a liquid guide wire 7 is connected between the oxygen-controlled reflecting microspheres 8, the regeneration assisting ball rotates when being acted by a rotating magnetic field, and separates from the liquid storage sleeve 3 by the centrifugal force exerted on the centrifugal sealing blocks 5 while stirring macroscopically, the hydrogen peroxide solution in the liquid storage sleeve 3 is released, and the oxygen is rapidly decomposed and released under the catalytic action of the oxygen-controlling reflecting microspheres 8 by being in contact with the oxygen-controlling reflecting microspheres 8 through the guiding and conveying of the liquid guide wires 7, and the oxygen is released into a photocatalytic system through the oxygen-controlling reflecting microspheres 8, so that on one hand, the regeneration is carried out in cooperation with photocatalysis, and on the other hand, the light transmittance of a local area can be improved by micro-stirring, thereby improving the photocatalytic effect.
Referring to fig. 4, the oxygen-controlling reflective microsphere 8 includes a hollow reflective hemisphere 81, a porous catalytic hemisphere 82 and a waterproof permeable membrane 83, the hollow reflective hemisphere 81 and the porous catalytic hemisphere 82 are symmetrically connected, the hollow reflective hemisphere 81 is located at an outer side of the porous catalytic hemisphere 82, the waterproof permeable membrane 83 is covered on an outer surface of the hollow reflective hemisphere 81, a plurality of uniformly distributed action holes are formed in the hollow reflective hemisphere 81, a matched reflective ball 9 is movably embedded in the action holes, the reflective ball 9 is located between the hollow reflective hemisphere 81 and the waterproof permeable membrane 83, an outer elastic wire 10 is connected between the reflective ball 9 and the porous catalytic hemisphere 82, the hollow reflective hemisphere 81 can reflect light, so as to improve the illumination effect in the photocatalytic system, the action holes are blocked by the reflective ball 9 in a normal state, the reflective ball 9 is squeezed to be separated after a certain amount of oxygen is generated, then, the gas is released into the system through the waterproof breathable film 83, so that the release of oxygen is controlled, the over-high oxygen concentration is avoided, meanwhile, the reflecting effect on illumination is further improved by utilizing the mobility of the reflecting movable ball 9 when the reflecting movable ball is separated from an acting hole, the probability of full coverage in the system is improved, and the general photocatalysis effect caused by illumination dead angles is not easy to occur.
The suspension hemisphere 1 is made of light materials, the magnetic hemisphere 2 is made of ferromagnetic materials, and the whole weight of the magnetic hemisphere 2 area is larger than that of the suspension hemisphere 1 area, so that the regeneration assisting ball can play a role in a reasonable posture in a photocatalysis system, and the action of assisting regeneration can be triggered by effectively utilizing centrifugal force.
The hollow reflecting hemisphere 81 and the reflecting movable ball 9 are both made of high-reflectivity materials, the porous catalytic hemisphere 82 is made of manganese dioxide and is of a porous structure, the illumination distribution condition in the photocatalytic system is jointly improved by utilizing the fixed reflection of the hollow reflecting hemisphere 81 and the movable reflection of the reflecting movable ball 9, the manganese dioxide of the porous structure can be fully contacted with a hydrogen peroxide solution, and gas generated by decomposition can also enter the hollow reflecting hemisphere 81 to be released.
The invention can regenerate the invalid Fe (II) EDTA complex liquid by optimizing the photocatalytic regeneration process and using Fe2(C2O4)3 solution in a mode of adding regeneration-assisting balls, forces the regeneration-assisting balls to fully act in a photocatalytic system based on a magnetic stirring mode, slowly releases hydrogen peroxide solution in the photocatalytic system based on a centrifugal effect, then oxygen is orderly released into the system under the catalytic action, the oxygen can oxidize Fe (II) EDTA to relatively increase the concentration of Fe3+ in the solution, which is beneficial to improving the generation of-OH in the system, thereby helping the regeneration of the complexing liquid and controlling the oxygen concentration by controlling the rotating speed of the regeneration-assisting ball, the device can play a role in micro-stirring in the process of releasing oxygen and promote the reflection of the regeneration assisting ball to illumination, thereby comprehensively improving the photocatalysis effect and the regeneration rate of the complex denitration agent.
The above are merely preferred embodiments of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (10)
1. A regeneration process of a spent complexing denitration agent is characterized by comprising the following steps: the method comprises the following steps:
s1, placing the invalid complex denitration agent in a photocatalytic system, and then adjusting the pH value to 5.3;
s2, uniformly mixing a Fe2(C2O4)3 solution with the concentration of 0.001mol/L with a complexing denitration agent, and adding a plurality of regeneration-assisting balls;
s3, placing a light source above the photocatalytic system, and applying a rotating uniform magnetic field to force the regeneration-assisting balls to stir so as to release oxygen and improve the photocatalytic effect;
s4, the photocatalytic regeneration reaction in the photocatalytic system lasts for 50-70min, and the regeneration-assisting balls are recovered after the reaction is finished.
2. The regeneration process of the spent complexing denitration agent according to claim 1, wherein: the complexing denitration agent is Fe (II) EDTA with the concentration of 0.01mol/L, and the initial pH is adjusted by dilute H2SO4 or NaOH.
3. The regeneration process of the spent complexing denitration agent according to claim 1, wherein: the Fe2(C2O4)3 solution is prepared by compounding Na2CO4 and FeSO4 which are 3:1 in proportion, and the concentrations of the Fe2(C2O4) solution and the FeSO4 are 0.06 mol/L and 0.02mol/L respectively.
4. The regeneration process of the spent complexing denitration agent according to claim 1, wherein: in the step S3, a constant-temperature oil bath is adopted for oil bath heating, and the heating temperature is 45-55 ℃.
5. The regeneration process of the spent complexing denitration agent according to claim 1, wherein: the light source in step S3 is an ultraviolet high-pressure mercury lamp with 175W power and a wavelength of 365 nm.
6. The regeneration process of the spent complexing denitration agent according to claim 1, wherein: in the step S3, the concentration of oxygen in the photocatalytic system is 2% -5%.
7. The regeneration process of the spent complexing denitration agent according to claim 1, wherein: help regeneration ball including suspension hemisphere (1), magnetism hemisphere (2) and the stock solution cover (3) that has hydrogen peroxide solution with filling, suspension hemisphere (1) and magnetism hemisphere (2) longitudinal symmetry connect, stock solution cover (3) are connected in the inboard between suspension hemisphere (1) and magnetism hemisphere (2), stock solution cover (3) the inner is connected with location silk (4) of vertical setting, the activity is inlayed on stock solution cover (3) has a plurality of centrifugation seals piece (5) along location silk (4) ring array distribution, be connected with many interior elastic filament (6) between centrifugation seals piece (5) and location silk (4), all be connected with on suspension hemisphere (1) and the magnetism hemisphere (2) and inlay a plurality of evenly distributed's accuse oxygen reflection of light microballons (8), be connected with guide silk (7) between accuse oxygen reflection of light microballon (8).
8. The regeneration process of the spent complexing denitration agent according to claim 7, wherein: oxygen-control reflecting microsphere (8) are including hollow reflection of light hemisphere (81), porous catalysis hemisphere (82) and waterproof ventilated membrane (83), hollow reflection of light hemisphere (81) and porous catalysis hemisphere (82) symmetric connection, and hollow reflection of light hemisphere (81) relative porous catalysis hemisphere (82) are located the outside, waterproof ventilated membrane (83) cladding is on the surface of hollow reflection of light hemisphere (81), set up a plurality of evenly distributed's effect hole on hollow reflection of light hemisphere (81), the downthehole activity of effect is inlayed and is had assorted reflection of light movable ball (9), and reflection of light movable ball (9) are located between hollow reflection of light hemisphere (81) and waterproof ventilated membrane (83), be connected with outer elastic filament (10) between reflection of light movable ball (9) and porous catalysis hemisphere (82).
9. The regeneration process of the spent complexing denitration agent according to claim 7, wherein: the suspension hemisphere (1) is made of a light material, the magnetic hemisphere (2) is made of a ferromagnetic material, and the whole weight of the magnetic hemisphere (2) area is larger than that of the suspension hemisphere (1).
10. The regeneration process of the spent complexing denitration agent according to claim 8, wherein: the hollow reflecting hemisphere (81) and the reflecting movable ball (9) are both made of high-reflectivity materials, and the porous catalytic hemisphere (82) is made of manganese dioxide and is of a porous structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110394392.4A CN113083016B (en) | 2021-04-13 | 2021-04-13 | Regeneration process of failure complexation denitration agent |
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| JPS5998739A (en) * | 1982-11-30 | 1984-06-07 | Mitsubishi Heavy Ind Ltd | Regeneration of catalyst |
| CN101327397A (en) * | 2008-07-03 | 2008-12-24 | 大连理工大学 | Method for simultaneously removing SO2 and NO in flue gas by biological reduction and complexing absorption |
| US20130028810A1 (en) * | 2011-07-29 | 2013-01-31 | Karandikar Bhalchandra M | Two Part Oxygen Generating System |
| CN102976273A (en) * | 2012-12-11 | 2013-03-20 | 哈尔滨工业大学 | Device and method for rapidly producing oxygen |
| CN105498495A (en) * | 2015-12-31 | 2016-04-20 | 中山大学 | Device for treating waste gas by Fenton oxidation |
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| JPS5998739A (en) * | 1982-11-30 | 1984-06-07 | Mitsubishi Heavy Ind Ltd | Regeneration of catalyst |
| CN101327397A (en) * | 2008-07-03 | 2008-12-24 | 大连理工大学 | Method for simultaneously removing SO2 and NO in flue gas by biological reduction and complexing absorption |
| US20130028810A1 (en) * | 2011-07-29 | 2013-01-31 | Karandikar Bhalchandra M | Two Part Oxygen Generating System |
| CN102976273A (en) * | 2012-12-11 | 2013-03-20 | 哈尔滨工业大学 | Device and method for rapidly producing oxygen |
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