CN211712907U - Sludge reduction treatment system based on ozone micro-nano bubbles - Google Patents
Sludge reduction treatment system based on ozone micro-nano bubbles Download PDFInfo
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- CN211712907U CN211712907U CN201922296405.5U CN201922296405U CN211712907U CN 211712907 U CN211712907 U CN 211712907U CN 201922296405 U CN201922296405 U CN 201922296405U CN 211712907 U CN211712907 U CN 211712907U
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- 239000010802 sludge Substances 0.000 title claims abstract description 68
- 239000002101 nanobubble Substances 0.000 title claims abstract description 50
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 230000009467 reduction Effects 0.000 title claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 19
- 238000010521 absorption reaction Methods 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000012546 transfer Methods 0.000 claims abstract description 5
- 239000012495 reaction gas Substances 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 abstract description 5
- -1 water tank Chemical compound 0.000 abstract description 4
- 239000007800 oxidant agent Substances 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 description 22
- 230000003647 oxidation Effects 0.000 description 21
- 238000000034 method Methods 0.000 description 14
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000005416 organic matter Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 150000003254 radicals Chemical class 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000012028 Fenton's reagent Substances 0.000 description 2
- 238000007259 addition reaction Methods 0.000 description 2
- 238000010564 aerobic fermentation Methods 0.000 description 2
- 150000001728 carbonyl compounds Chemical class 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000006352 cycloaddition reaction Methods 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 125000006575 electron-withdrawing group Chemical group 0.000 description 2
- 238000007350 electrophilic reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005899 aromatization reaction Methods 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 229910000357 manganese(II) sulfate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007344 nucleophilic reaction Methods 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000009283 thermal hydrolysis Methods 0.000 description 1
- 238000006276 transfer reaction Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Treatment Of Sludge (AREA)
Abstract
The utility model relates to a mud minimizing processing system based on micro-nano bubble of ozone, including water tank, ozone generator, micro-nano bubble generator, sludge reactor, tail gas absorption tank and mud collection tank, the water tank passes through the transfer line and is connected with micro-nano bubble generator, and ozone generator is connected with micro-nano bubble generator, and micro-nano bubble generator's ejection of compact spout is connected with sludge reactor, and the reaction gas export on sludge reactor upper portion is connected with the tail gas absorption tank, bottom sludge outlet and mud collection tank are connected. The utility model discloses can improve the utilization ratio to ozone oxidant, promote mud minimizing treatment efficiency, avoid producing secondary pollution.
Description
Technical Field
The utility model belongs to the technical field of sludge treatment, especially, relate to a mud minimizing processing system based on ozone micro-nano bubble.
Background
The treatment of activated sludge is a difficult problem in the field of garbage treatment, and the treatment cost of excess sludge accounts for 25% -60% of the operation cost of sewage treatment plants, so that the realization of sludge reduction is the main research focus at home and abroad at present. The sludge has the characteristics of high water content, large volume, high treatment cost and the like, and the types of the activated sludge mainly comprise the following components: primary sedimentation tank sludge, excess sludge, return sludge and the like. With the continuous emergence of stricter environmental protection policies and regulations in various countries in the world, economic and efficient activated sludge treatment processes are in urgent need of upgrading.
The technical principle of sludge reduction can be mainly divided into a physical method, a chemical method and a biological method, and mainly comprises the processes of thermal hydrolysis, mechanical cracking, ultrasonic cracking, ozonization, anaerobic oxidation, aerobic fermentation and the like. Among these methods, aerobic fermentation is one of the representative techniques for resource utilization, but has the disadvantages of long period, large floor space, easily-caused secondary pollution due to auxiliary material sources and waste gas, and the like. The anaerobic digestion of sludge is the most widely used method for stabilizing and reducing sludge internationally at present, and is characterized in that the sludge productivity can be utilized to reduce the cost, but the running stability, the biogas yield and other indexes of digestion equipment are greatly influenced by the characteristics of the sludge, so the improvement of the equipment and the outlet problem of products need to be explored for a long time.
Because the advanced oxidation method has the advantages of simple process, low cost, no secondary pollution and the like, the advanced oxidation method is a promising method in the aspects of reducing the external cost, improving the sludge reduction effect and rate, meeting the sludge reduction and resource demand and the like. The advanced oxidation treatment technology of the sludge mainly comprises Fenton reagent oxidation, O3 oxidation, wet air oxidation and supercritical treatmentWater oxidation and the like. Currently, the most studied advanced oxidation methods are mainly Fenton reagent oxidation, O3 oxidation and the like. The Fenton oxidation technology has the advantages of rapidness, economy, environmental friendliness and the like, but the defects of incomplete mineralization of organic matters and the like restrict the wide application of the Fenton oxidation technology. O is3Is a common strong oxidant, but O3The direct oxidation reaction has higher selectivity, slower reaction rate and low utilization rate. Due to O3The indirect oxidation is to decompose the organic matter by utilizing the characteristic that the decomposition of ozone in water can generate free radicals with strong oxidizing capability, and the indirect oxidation has the characteristics of high reaction rate, low selectivity and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a mud minimizing processing system based on ozone micro-nano bubble is provided, improve the utilization ratio and the mud minimizing processing efficiency to ozone oxidant.
The utility model provides a technical scheme that its technical problem adopted provides a mud minimizing processing system based on ozone micro-nano bubble, including water tank, ozone generator, micro-nano bubble generator, sludge reactor, tail gas absorption tank and mud collecting tank, the water tank passes through the transfer line and is connected with micro-nano bubble generator, ozone generator is connected with micro-nano bubble generator, micro-nano bubble generator's ejection of compact spout is connected with sludge reactor, the reaction gas outlet on sludge reactor upper portion is connected with the tail gas absorption tank, bottom sludge outlet is connected with the mud collecting tank.
And a gas flowmeter is arranged on the conveying pipe between the ozone generator and the micro-nano bubble generator.
And a stirring mechanism is arranged in the sludge reactor.
The utility model provides a technical scheme that its technical problem adopted provides a mud minimizing processing method based on ozone micro-nano bubble, has used foretell mud minimizing processing system based on ozone micro-nano bubble, including following step:
(1) introducing ozone generated by an ozone generator into a micro-nano bubble generator to serve as an air source, and introducing water into the micro-nano bubble generator to prepare an ozone micro-nano bubble water system;
(2) injecting ozone micro-nano bubble water into a sludge reactor at a high speed through a discharge nozzle of a micro-nano bubble generator;
(3) preparation of Fe-containing2+Or Mn2+The solution is introduced into a sludge reactor, fully stirred with activated sludge and then subjected to sludge oxidation treatment;
(4) and adding a potassium iodide solution into the tail gas absorption tank, and introducing the tail gas into the tail gas absorption tank for tail gas absorption.
Advantageous effects
First, the utility model discloses can utilize the direct oxidation of ozone and decompose the indirect oxidation that produces and have strong oxidability free radical to carry out oxidation minimizing treatment to activated sludge simultaneously, be favorable to improving the utilization ratio to ozone, promote mud minimizing treatment efficiency.
Second, the utility model discloses utilized ozone micro-nano bubble water system to carry out the minimizing treatment to activated sludge, micro-nano bubble can persist in the aquatic for a long time, be favorable to increasing ozone bubble and mud organic matter contact reaction time, and specific surface area is big, and inside mass transfer efficiency is high, improve gas-liquid exchange efficiency, and ozone micro-nano bubble self has the effect that the pressure boost was dissolved, be favorable to producing a large amount of free radicals and carry out sludge oxidation, make the high-usage to ozone, sludge minimizing treatment is efficient.
Thirdly, the utility model discloses carry out absorption treatment to the ozone that does not react completely, avoided producing secondary pollution.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
The sludge reduction treatment system based on the ozone micro-nano bubbles as shown in fig. 1 comprises a water tank 1, an ozone generator 2, a micro-nano bubble generator 3, a sludge reactor 4, a tail gas absorption tank 5 and a sludge collection tank 6.
The water tank 1 is connected with the micro-nano bubble generator 3 through a liquid conveying pipe, the ozone generator 2 is connected with the micro-nano bubble generator 3, and a gas flowmeter is arranged on a conveying pipe between the ozone generator 2 and the micro-nano bubble generator 3. The discharge nozzle of the micro-nano bubble generator 3 is connected with the sludge reactor 4, and a stirring mechanism is arranged inside the sludge reactor 4. The reaction gas outlet at the upper part of the sludge reactor 4 is connected with a tail gas absorption tank 5, and the sludge outlet at the bottom part is connected with a sludge collection tank 6.
The following provides a sludge reduction treatment method based on ozone micro-nano bubbles, and the sludge reduction treatment system based on the ozone micro-nano bubbles comprises the following steps:
(1) adding fresh activated sludge mixed liquor into the sludge reactor 4, wherein the concentration of the sludge mixed liquor is 4500 mg/L.
(2) And (3) introducing ozone generated by the ozone generator 2 into the micro-nano bubble generator 3 as an air source, and introducing water into the micro-nano bubble generator 3 to prepare an ozone micro-nano bubble water system. Controlling the pH value of inlet water of the micro-nano bubble generator 3 to be 6.5-7.0, controlling the inlet water flow to be 300mL/min, controlling the inlet air flow to be 12mL/min and controlling the inlet air pressure to be 0.2 MPa.
(3) Injecting ozone micro-nano bubble water into a sludge reactor 4 at a high speed through a discharge nozzle of a micro-nano bubble generator 3;
(4) by using FeSO4·6H2O or MnSO4·2H2Preparation of O containing 4mmol/L Fe2+Or 4mmol/L Mn2+The transition metal ion solution is introduced into a sludge reactor 4, fully stirred with activated sludge and then subjected to sludge oxidation treatment;
(5) adding potassium iodide solution into the tail gas absorption tank 5, and introducing the tail gas into the tail gas absorption tank (5) for tail gas absorption.
The micro-nano bubbles are mixed micro-bubbles with the diameter of 50 mu m-200 nm, the solubility of the micro-nano bubbles in water exceeds 85%, and the micro-nano bubbles are remained in the water in a bubble mode for a long time (the rising speed is 6 cm/min) and are attached to the surface of an organic matter, so that the ozone bubbles are contacted with the sludge for a long time, and a large amount of hydroxyl radicals are generated in the self pressurizing and dissolving process, so that the purposes of fully oxidizing the sludge and improving the sludge reduction efficiency are achieved, and in the example, the sludge reduction efficiency can reach more than 38%.
The technical principle of the utility model is as follows:
first, chemical reaction principle:
(1)O3principle of free radical generation in liquid phase:
O3+OH-→HO2 -+O2
O3+HO2 -→O3 -·+HO2 -
O3+O2 -·→O3 -·+O2
O3 -·+H+→HO3·
HO3·→·OH+O2
(2)O3the principle of generating hydroxyl radicals by cooperating with a transition metal catalyst is as follows:
(I) Fe2+
Fe2++O3→Fe3++O3 ·-
O3 ·-+H+→O2+OH
Fe2++O3→FeO2++O2
FeO2++H2O→Fe3++OH+OH-
Fe3++O3+H2O→FeO2++H++OH+O2
2HO· 2→H2O2+O2
(II) Mn2+
Mn2++O3+2H+→Mn4++O2+H2O
Mn4++3/2O3+3H+→Mn7++3/2O2+3/2H2O
M (organic) + Mn7++3/2H2O→Mn4++3H++ P (product)
Mn2++Mn4+→2Mn3+
Mn2++O3+H+→Mn3++O2+OH
(3)O3Absorption principle of potassium iodide solution:
O3(g)+2KI(g)+H2O(1)→O2(g)+I2(colored) +2KOH
Secondly, the action principle of ozone in the sludge cracking process is as follows:
direct reaction: (1) and (3) cycloaddition reaction: i.e. O3Can perform cycloaddition reaction with unsaturated bonds of organic matters to form lower O3The compound is oxidized into carbonyl compounds such as aldehyde and ketone and partial zwitterions in aqueous solution, and the zwitterions are rapidly oxidized into carbonyl-peroxy basic state to finally form the carbonyl compounds and hydrogen peroxide; (2) electrophilic reaction: that is, electrophilic reaction is easy to occur at the position with high electron cloud density and electron donating group (such as-OH, -NH)2) The aromatic substituent has high electron cloud density on ortho-position and para-position carbon atoms, has high reaction speed with ozone, and has electron-withdrawing groups (such as-COOH and-NO)2) The reaction speed of the aromatic substituent and the ozone is slow; (3) nucleophilic reaction: typically at electron deficient sites, particularly carbonyl sites with electron withdrawing groups, or by transfer of O.
Indirect reaction: (1) electron transfer reaction, namely OH takes electrons from the organic matter and is reduced into OH-; (2) hydrogen extraction reaction, namely OH extracts H on different substituents of organic matters to generate organic matter free radicals and water; (3) OH addition reactions, i.e. aromatisation of OH with olefins or with aromaticsThe double bond on the compound undergoes an addition reaction to form OH-。
Claims (3)
1. The utility model provides a mud minimizing processing system based on micro-nano bubble of ozone which characterized in that: including water tank (1), ozone generator (2), micro-nano bubble generator (3), sludge reactor (4), tail gas absorption tank (5) and sludge collection tank (6), water tank (1) is connected with micro-nano bubble generator (3) through the transfer line, ozone generator (2) are connected with micro-nano bubble generator (3), the ejection of compact spout and sludge reactor (4) of micro-nano bubble generator (3) are connected, the reaction gas export on sludge reactor (4) upper portion is connected with tail gas absorption tank (5), bottom sludge outlet and sludge collection tank (6) are connected.
2. The sludge reduction treatment system based on the ozone micro-nano bubbles as claimed in claim 1, wherein: and a gas flowmeter is arranged on the conveying pipe between the ozone generator (2) and the micro-nano bubble generator (3).
3. The sludge reduction treatment system based on the ozone micro-nano bubbles as claimed in claim 1, wherein: and a stirring mechanism is arranged in the sludge reactor (4).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI790063B (en) * | 2021-12-27 | 2023-01-11 | 樊滿舟 | Quality transmission equipment and method for heterogenous interface |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI790063B (en) * | 2021-12-27 | 2023-01-11 | 樊滿舟 | Quality transmission equipment and method for heterogenous interface |
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