Micro-bubble deodorization device and process thereof

Abstract

The invention relates to the technical field of air pollution treatment, and provides a microbubble deodorization device and a deodorization process, the microbubble deodorization device comprises a material slag gas collection settling chamber, a glass fiber reinforced plastic washing tower, a stainless steel spray tower, a refrigerator cooling tower, a waste gas oxidation tower, a fan, a microbubble tower assembly and an exhaust cylinder which are connected in sequence. The microbubble tower assembly comprises a base, a plurality of spraying cylinders, a top seat and a spraying assembly arranged in the top seat. The base is provided with an air collecting cavity communicated with an outlet of the fan, and a through pipeline is formed in the spraying cylinder. The spraying assembly comprises a spraying part located on the top seat and a circulating pipeline, a gas-liquid mixing piece arranged in the water flow direction is arranged on the circulating pipeline, the gas-liquid mixing piece is provided with a communicating pipe communicated with the gas collecting cavity, the circulating pipeline is provided with a connecting part connected with each spraying barrel, and a liquid collecting cavity is formed in the base and communicated with the spraying barrels. Waste gas is fully dissolved and purified, the convective heat transfer efficiency is high, organic volatile matter in the waste gas is effectively removed, and the pollutant removal rate is increased.

Description

Technical Field

[0001] This invention relates to the field of air pollution treatment technology, and in particular to a microbubble deodorization device. This invention also relates to a process for deodorization using this microbubble deodorization device. Background Technology

[0002] Air quality has a significant impact on many aspects of social production and life. In particular, odorous gases are highly volatile, easily dispersed, have a strong pungent odor, and are highly toxic. They may have adverse effects on the human respiratory, digestive, endocrine, nervous, and mental systems. In fact, high concentrations of organic odorous gases can lead to acute poisoning and death.

[0003] Existing technologies employ nanobubble exhaust gas treatment, which involves spraying and expanding industrial exhaust gases to dissolve pollutants in the organic waste gases during the contact process. Although microbubbles are highly effective at oxidizing sulfur-containing compounds such as hydrogen sulfide, and current gas emission concentrations meet standards, it is difficult to consistently achieve a comprehensive reduction in odor concentrations.

[0004] Furthermore, in existing waste gas treatment processes, activated carbon adsorption boxes are often installed in the step following the cooling tower to adsorb organic matter, which is particularly suitable for treating large volumes of waste gas. However, when treating high-concentration waste gas, activated carbon needs to be replaced frequently, and coal-based activated carbon has a high unit price, resulting in high replacement costs when treating large volumes of waste gas. Summary of the Invention

[0005] In view of this, the present invention aims to provide a microbubble deodorization device that can fully dissolve and purify waste gas, has high convective heat transfer efficiency, effectively removes volatile organic compounds from waste gas, and improves the pollutant removal rate.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] A microbubble deodorization device includes a material and slag gas collection and settling chamber, a fiberglass washing tower, a stainless steel spray tower, a chiller cooling tower, a waste gas oxidation tower, a fan, a microbubble tower assembly, and an exhaust duct connected in sequence.

[0008] The microbubble tower assembly includes a base, a plurality of spray cylinders disposed on the base, a top seat disposed on the upper part of the spray cylinders, and a spray assembly disposed in the top seat;

[0009] The base is provided with an air collection chamber that communicates with the outlet of the fan, and a through pipe is formed inside the spray cylinder.

[0010] The spray assembly includes a spray section located on the top base and a circulation pipeline. The circulation pipeline is provided with a gas-liquid mixing component arranged along the water flow direction. The gas-liquid mixing component is provided with a connecting pipe communicating with the gas collection chamber. The circulation pipeline is provided with a connecting part communicating with each of the spray cylinders. The base is provided with a liquid collection chamber, which is communicating with the spray cylinders.

[0011] Furthermore, a pressurizing chamber is formed inside the gas-liquid mixing component. The pressurizing chamber is in the same direction as the water flow in the circulation pipeline. The connecting pipe is set perpendicular to the pressurizing chamber. When the water flow in the circulation pipeline passes through the pressurizing chamber, part of the airflow in the gas collecting chamber enters the pressurizing chamber.

[0012] Furthermore, the top seat has a cavity formed inside, and the upper part of the top seat is also provided with an air outlet communicating with the cavity. The exhaust duct is connected to the air outlet, and the pipe connects the air collection chamber and the cavity.

[0013] Furthermore, the base is provided with a liquid collection frame, the liquid collection cavity is formed in the liquid collection frame, and the gas collection cavity is located in the liquid collection frame;

[0014] The circulation pipeline includes a first pipeline and a second pipeline disposed on both sides of the spray section, and a third pipeline connecting the first pipeline and the second pipeline.

[0015] The gas-liquid mixing element is respectively provided between the third pipeline and the first pipeline, and between the third pipeline and the second pipeline.

[0016] Furthermore, a high-pressure pump is provided in the third pipeline near the gas-liquid mixing component.

[0017] Furthermore, the connecting part includes a return pipe connected to the first pipe and the second pipe, the return pipe is provided with a liquid injection pipe communicating with the spray cylinder, the return pipe is provided with a first shut-off valve, and the first pipe and the second pipe are also provided with a second shut-off valve;

[0018] The second shut-off valve is used to control the on / off state of the water circuit of the spray section.

[0019] Furthermore, the liquid collecting chamber is provided with a box body, the gas collecting chamber is formed in the box body, the lower part of the box body is provided with a driving part, and the box body is provided with blades connected to the power output end of the driving part, and the driving part drives the blades to rotate.

[0020] Furthermore, the gas-liquid mixing component includes a lower connecting body and an upper connecting body, as well as a partition disposed between the upper connecting body and the lower connecting body;

[0021] The connecting pipe is connected to one side of the upper connecting body;

[0022] The pressurization chamber is formed in the upper connecting body, the lower connecting body has an air inlet chamber, and the upper end of the upper connecting body has an air outlet chamber.

[0023] Furthermore, the pressurization chamber includes a cylindrical chamber, a first conical chamber, a second conical chamber, and a flow-limiting chamber, wherein the flow-limiting chamber is connected to the air outlet chamber;

[0024] The connecting pipe is disposed between the box body and the upper connecting body, and the connecting pipe connects the gas collecting chamber and the cylindrical cavity.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The microbubble deodorization device of this invention comprises a multi-stage, step-by-step odor removal system consisting of a slag collection and settling chamber, a fiberglass scrubbing tower, a stainless steel spray tower, a chiller cooling tower, a waste gas oxidation tower, a fan, a microbubble tower assembly, and an exhaust duct, all connected in sequence. A spray assembly is installed above the microbubble tower assembly. Through the spray section and circulation pipeline, the gas after previous treatment is passed through a gas-liquid mixer to form micro-nano bubbles. These mixed micro-nano bubbles, in water, accelerate the mass transfer of odor molecules from the gas phase to the liquid phase. The mixed micro-nano bubble liquid then flows into the spray cylinder and then into the collection chamber. Dynamic mixing ensures thorough combination of the liquid medium and odor molecules. The contraction or collapse of the bubbles generates localized high temperature and pressure, promoting the dissolution of hydrophobic, insoluble VOCs and improving the catalytic reaction efficiency.

[0027] Furthermore, the high-pressure water flow prevents pollutants from accumulating at the outlet of the gas-liquid mixing component, maintaining bubble generation efficiency. It can achieve rapid purification within minutes for adsorbable pollutants such as oil and particulate matter, as well as easily oxidized substances such as H2S.

[0028] Another objective of this invention is to provide a microbubble deodorization process, which uses the microbubble deodorization device described above for industrial waste gas treatment, and the steps are as follows:

[0029] S1, the exhaust gas enters the feed inlet of the slag gas collection and settling chamber through a closed pipe. After being settled by a screen, large particles of impurities are initially separated. The gas is then introduced from the top outlet of the slag gas collection and settling chamber into the bottom air inlet of the fiberglass washing tower for the absorption and cooling of water-soluble pollutants.

[0030] S2, the gas obtained in step S1 is connected from the clean gas outlet at the top of the FRP scrubbing tower to the air inlet at the bottom of the stainless steel spray tower through a flange, and the acidic gas is neutralized by alkaline spraying inside the stainless steel spray tower.

[0031] S3, the gas obtained in step S2 is connected from the top outlet of the stainless steel spray tower to the inlet of the refrigeration cooling tower through the insulated air duct, and the gas is cooled to 20-40℃.

[0032] S4, the gas cooled in step S3 enters the inlet at the bottom of the waste gas oxidation tower and hydrogen peroxide is sprayed in to remove organic waste gas.

[0033] S5, the gas obtained in step S4 is connected from the outlet of the waste gas oxidation tower to the inlet of the blower through the duct. The blower provides negative pressure suction to drive the airflow of the system and maintains a constant gas velocity of 0.5-1.5m / s.

[0034] S6, the gas obtained in step S5 is connected from the fan outlet to the gas collection chamber in the base of the microbubble tower component, and enters the circulation pipeline in the form of a high-density micro-nano bubble group through the gas-liquid mixing component. An oxidant or alkaline solution is injected into the circulation pipeline.

[0035] S7, close the second shut-off valve and open the first shut-off valve. The mixed liquid enters the spray cylinder from the return pipeline and flows into the collection chamber; the cycle is repeated a predetermined number of times or for a predetermined time.

[0036] S8. When the requirements are met, the first shut-off valve is closed and the second shut-off valve is opened. The mixture is sprayed out from the spray section through the second and third pipelines. The gas and liquid are separated, and the purified gas is discharged from the exhaust pipe.

[0037] The microbubble deodorization process of this invention achieves a multi-stage deodorization mechanism through step-by-step purification of sedimentation, washing, spraying, cooling, alkaline washing, and microbubble oxidation, ensuring the stratified and graded removal of pollutants. The blower is placed after the alkaline washing tower to prevent corrosive gases from directly contacting the blower impeller, thus extending equipment life. Using the microbubble tower as the final treatment unit fully utilizes its oxidation and decomposition efficiency, significantly improving the odor removal rate and significantly reducing energy consumption compared to traditional processes.

[0038] Furthermore, the microbubble generator continuously generates bubble clusters in flowing water, enhancing gas-liquid contact and increasing dissolved oxygen by 3-5 times, thus accelerating the oxidation and decomposition of pollutants. Combined with a circulation pipeline and high-pressure water pump, it can achieve coordinated operation, enabling uninterrupted repairs, making it suitable for scenarios requiring continuous operation, such as industrial cooling towers. Attached Figure Description

[0039] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0040] Figure 1 This is a schematic diagram of the arrangement of the microbubble deodorization device according to an embodiment of the present invention;

[0041] Figure 2This is a schematic diagram of the structure of the microbubble tower component according to an embodiment of the present invention;

[0042] Figure 3 This is a cross-sectional schematic diagram of the gas-liquid mixing component according to an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Slag and gas collection settling chamber; 2. Fiberglass scrubbing tower; 3. Stainless steel spray tower; 4. Refrigeration unit cooling tower; 5. Waste gas oxidation tower; 6. Fan; 7. Microbubble tower assembly; 8. Exhaust duct;

[0045] 701. Base; 702. Spray cylinder; 703. Top seat; 704. Spray section; 705. Circulation pipeline; 706. Gas-liquid mixing component; 707. Connecting pipe; 708. Connecting part; 709. First shut-off valve; 710. Second shut-off valve; 711. High-pressure pump;

[0046] 7011. Gas collecting chamber; 7012. Liquid collecting chamber; 7013. Box body; 7014. Drive unit; 7015. Blade;

[0047] 7031, cavity; 7032, air outlet;

[0048] 7051, First Pipeline; 7052, Second Pipeline; 7053, Third Pipeline;

[0049] 7061, Pressure boosting chamber; 7062, Lower connecting body; 7063, Upper connecting body; 7064, Baffle; 7065, Intake chamber; 7066, Exhaust chamber;

[0050] 7081, reflux line; 7082, injection line;

[0051] 70611, cylindrical cavity; 70622, first conical cavity; 70623, second conical cavity; 70624, flow-limiting cavity. Detailed Implementation

[0052] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0053] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "back," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0055] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] This embodiment relates to a microbubble deodorization device, which, as a whole, is as follows: Figure 1 As shown, the microbubble deodorization device includes a slag collection and settling chamber 1, a fiberglass washing tower 2, a stainless steel spray tower 3, a chiller cooling tower 4, a waste gas oxidation tower 5, a blower 6, a microbubble tower assembly 7, and an exhaust duct 8, connected in sequence. The microbubble tower assembly 7 includes a base 701, several spray cylinders 702 mounted on the base 701, a top seat 703 mounted on the upper part of the spray cylinders 702, and spray components mounted inside the top seat 703. The base 701 has a gas collection chamber 7011 communicating with the outlet of the blower 6, and the spray cylinders 702 have through pipes formed inside them. The spray assembly includes a spray section 704 located on the top seat 703 and a circulation pipe 705. The circulation pipe 705 is provided with a gas-liquid mixing component 706 arranged along the water flow direction. The gas-liquid mixing component 706 is provided with a connecting pipe 707 communicating with the gas collection chamber 7011. The circulation pipe 705 is provided with a connecting part 708 communicating with each spray cylinder 702. The base 701 is provided with a liquid collection chamber 7012, which is communicating with the spray cylinder 702.

[0057] As designed above, the microbubble deodorization device in this embodiment forms a multi-stage, step-by-step odor removal system by sequentially connecting the following components: a slag collection and settling chamber 1, a fiberglass washing tower 2, a stainless steel spray tower 3, a chiller cooling tower 4, a waste gas oxidation tower 5, a fan 6, a microbubble tower assembly 7, and an exhaust duct 8. A spray assembly is installed on the upper part of the microbubble tower assembly 7. Through the spray section 704 and the circulation pipeline 705, the gas after the previous treatment is passed through the gas-liquid mixing component 706 to form micro-nano bubbles. The mixed micro-nano bubbles in water accelerate the mass transfer of odor molecules from the gas phase to the liquid phase. The mixed micro-nano bubble liquid then enters the spray cylinder 702 and flows into the liquid collection chamber 7012. Through dynamic mixing, the liquid medium and odor molecules are fully combined. When the bubbles contract or burst, local high temperature and pressure are generated, promoting the dissolution of hydrophobic VOCs and improving the catalytic reaction efficiency.

[0058] Furthermore, the high-pressure water flow prevents pollutants from depositing at the outlet of the gas-liquid mixing component 706, maintaining bubble generation efficiency. This allows for rapid purification within minutes of adsorbable pollutants such as oil and particulate matter, as well as easily oxidized substances such as H2S.

[0059] Based on the above overall description, an exemplary structure of the microbubble deodorization device in this embodiment is as follows: Figure 1 As shown, the slag collection and settling chamber 1 separates large particulate impurities through gravity settling, reducing the risk of blockage in subsequent equipment, and also concentrates odorous gases, achieving preliminary pressure equalization and flow stabilization. The fiberglass scrubbing tower 2 is used for spraying weak acid or alkaline solutions, capable of dissolving water-soluble pollutants such as ammonia and dust, and for cooling and dust removal. The use of fiberglass material ensures corrosion resistance and adaptability to high-humidity exhaust gases. Figure 1 As shown in the figure, in this embodiment, the outlet 7032 of the cooling tower is connected to two sets of waste gas oxidation towers 5, fan 6, microbubble tower components 7 and exhaust duct 8 through connecting pipes to improve the overall production efficiency of waste gas purification.

[0060] As a preferred embodiment, such as Figures 1 to 2 As shown, a pressurizing chamber 7061 is formed within the gas-liquid mixing component 706. The pressurizing chamber 7061 flows in the same direction as the water flow in the circulation pipe 705. The connecting pipe 707 is positioned perpendicular to the pressurizing chamber 7061. When the water flow in the circulation pipe 705 passes through the pressurizing chamber 7061, a portion of the airflow in the gas collecting chamber 7011 enters the pressurizing chamber 7061. The layout of the pressurizing chamber 7061 facilitates rapid water flow, creating negative pressure and automatically drawing out the gas from the gas collecting chamber 7011.

[0061] And, as Figure 3 As shown, a cavity 7031 is formed inside the top seat 703, and an air outlet 7032 communicating with the cavity 7031 is also provided on the upper part of the top seat 703. The exhaust duct 8 is connected to the air outlet 7032, and the pipe connects the gas collection chamber 7011 and the cavity 7031. After purification, the gas is sprayed by the spray assembly to facilitate gas separation, and the purified air enters the exhaust duct 8 from the air outlet 7032 for discharge.

[0062] like Figure 2As shown, a liquid collection frame is provided inside the base 701, a liquid collection chamber 7012 is formed inside the liquid collection frame, and a gas collection chamber 7011 is located inside the liquid collection frame. The circulation pipeline 705 includes a first pipeline 7051 and a second pipeline 7052 located on both sides of the spray section 704, and a third pipeline 7053 connecting the first pipeline 7051 and the second pipeline 7052. Gas-liquid mixing components 706 are respectively provided between the third pipeline 7053 and the first pipeline 7051, and between the third pipeline 7053 and the second pipeline 7052. A high-pressure pump 711 is located on the third pipeline 7053 near the gas-liquid mixing component 706. By setting the high-pressure pump 711, the mixed liquid in the liquid collection frame is drawn and transported to the connecting part 708 for reciprocating circulation, enabling linkage operation.

[0063] Furthermore, such as Figure 2 As shown, the connection part 708 includes a return pipe 7081 connected to the first pipe 7051 and the second pipe 7052. The return pipe 7081 is provided with an injection pipe 7082 communicating with the spray cylinder 702. A first shut-off valve 709 is provided on the return pipe 7081. A second shut-off valve 710 is also provided on the first pipe 7051 and the second pipe 7052. The second shut-off valve 710 is used to control the on / off of the water circuit of the spray part 704.

[0064] In addition, such as Figure 2 As shown, a housing 7013 is provided inside the liquid collection chamber 7012, and a gas collection chamber 7011 is formed inside the housing 7013. A drive unit 7014 is provided at the lower part of the housing 7013, and a blade 7015 connected to the power output end of the drive unit 7014 is provided inside the housing 7013. The drive unit 7014 drives the blade 7015 to rotate. In this embodiment, the drive unit 7014 is a motor. The motor drives the blade 7015 to rotate, thereby causing the blade 7015 to drive the gas flow. This not only improves the uniformity of gas concentration but also facilitates the flow of gas into the gas-liquid mixing component 706.

[0065] like Figure 3 As shown, the gas-liquid mixer 706 includes a lower connecting body 7062 and an upper connecting body 7063, and a partition 7064 disposed between the upper connecting body 7063 and the lower connecting body 7062. A connecting pipe 707 is connected to one side of the upper connecting body 7063, a pressurizing chamber 7061 is formed inside the upper connecting body 7063, an air inlet chamber 7065 is formed inside the lower connecting body 7062, and an air outlet chamber 7066 is formed at the upper end of the upper connecting body 7063. This gas-liquid mixer 706 adopts a rotating structure, wherein the flow rate and velocity of the water are controlled by the partition 7064, which facilitates the formation of microbubbles.

[0066] Preferably, as Figure 3As shown, the pressurization chamber 7061 includes a cylindrical chamber 70611, a first conical chamber 70622, a second conical chamber 70623, and a flow-limiting chamber 70624, which is connected to the air outlet chamber 7066. A connecting pipe 707 is disposed between the housing 7013 and the upper connecting body 7063, connecting the air collection chamber 7011 and the cylindrical chamber 70611. In this embodiment, the slope of the first conical chamber 70622 is less than that of the second conical chamber 70623, which facilitates a stable increase in water pressure, and the gas and high-pressure fluid form micro-nano bubbles through the flow-limiting chamber 70624.

[0067] Furthermore, this embodiment also relates to a microbubble deodorization process, which uses the microbubble deodorization device described above to treat industrial waste gas. The steps are as follows:

[0068] S1, the exhaust gas enters the feed inlet of the slag gas collection and settling chamber 1 through a closed pipe. After sedimentation by the screen, large particulate impurities are initially separated. The gas enters the bottom air inlet of the fiberglass washing tower 2 from the top outlet of the slag gas collection and settling chamber 1. Water-soluble pollutants are absorbed and cooled through the primary treatment of the fiberglass washing tower 2.

[0069] S2, the gas obtained in step S1 is connected from the clean gas outlet at the top of the FRP scrubbing tower 2 to the bottom air inlet of the stainless steel spray tower 3 through a flange. The gas is neutralized by alkaline spraying inside the stainless steel spray tower 3. The gas undergoes secondary enhanced treatment in the stainless steel spray tower 3 for further deep purification. The stainless steel spray tower 3 is equipped with a multi-layer spray system and a packing layer. By circulating alkaline spray or oxidant, acidic gases such as hydrogen sulfide are efficiently neutralized and organic matter is degraded.

[0070] S3. The gas obtained in step S2 is connected from the top outlet of the stainless steel spray tower 3 through an insulated air duct to the inlet of the refrigeration cooling tower 4, cooling the gas to 20-40℃. The gas temperature is regulated by the refrigeration cooling tower 4, and the gas is cooled to a suitable range for microbial activity through the refrigeration system, avoiding the impact of high temperature on the efficiency of subsequent biological treatment, while condensation removes some volatile organic compounds.

[0071] S4. The gas cooled in step S3 enters the inlet at the bottom of the waste gas oxidation tower 5, and hydrogen peroxide is added for spraying to remove organic waste gas.

[0072] S5, the gas obtained in step S4 is connected from the outlet of the waste gas oxidation tower 5 to the inlet of the blower 6 through the duct. The blower 6 provides negative pressure suction to drive the airflow of the system and maintains a constant air velocity of 0.5-1.5m / s. The function of the blower 6 is to provide gas flow power, stabilize the constant airflow velocity in the system, and ensure that the pollutants are in full contact with the treatment medium.

[0073] S6, the gas obtained in step S5 is connected from the outlet of the fan 6 to the gas collection chamber 7011 in the base 701 of the microbubble tower component, and enters the circulation pipeline 705 in the form of a high-density micro-nano bubble group through the gas-liquid mixing component 706. An oxidant or alkaline solution is injected into the circulation pipeline 705.

[0074] S7, close the second shut-off valve 710, open the first shut-off valve 709, the mixed liquid enters the spray cylinder 702 from the return pipe 7081 and flows into the collection chamber 7012; the cycle is run a predetermined number of times or for a predetermined time.

[0075] S8. When the requirements are met, the first shut-off valve 709 is closed and the second shut-off valve 710 is opened. The mixture is sprayed out from the spray section 704 through the second pipeline 7052 and the third pipeline 7053. The gas and liquid are separated, and the purified gas is discharged from the exhaust pipe.

[0076] In the deodorization device, a two-stage spray tower and a refrigeration tower are connected in series in a stepped manner. The exhaust gas first passes through a settling chamber to remove particles larger than 50μm, then enters the two-stage spray tower to neutralize acidic and alkaline substances. Subsequently, refrigeration cooling enhances the microbubble oxidation efficiency. A gas concentration detector is installed at the upper outlet 7032 to detect whether the separated gas meets emission standards. Furthermore, a demister can be installed above the spray section 704; the gas is discharged through the demister, and the liquid is recycled.

[0077] In this embodiment, the gas and water are mixed in the final deodorization process to form a dynamic circulation of micro-nano bubble mixture. This allows the waste gas to be fully absorbed and dissolved by the micro-nano bubbles, resulting in a strong absorption capacity and a strong negative ion release capacity. No ozone needs to be added. The pollutants are converted into harmless substances through chemical reactions such as oxidation and reduction, without secondary pollution.

[0078] For the remediation of high-concentration pollutants or special sites, the circulating water that has generated micro-nano bubbles can be injected into the liquid collection chamber 7012 in a static mode. In specific implementation, after repeating step S7 for a predetermined time, the first shut-off valve 709 and the second shut-off valve 710 are closed, so that the micro-nano bubbles rise slowly in the water, prolonging the contact time with the catalyst and pollutants, thereby achieving deep remediation.

[0079] This embodiment can achieve a balance between remediation efficiency and energy consumption by switching between dynamic and static modes. For the treatment of recalcitrant pollutants, such as hydrophobic heavy metals or stable organic compounds like benzene series compounds and phenols, the reaction time is extended to 0.5–2 hours. In the treatment of phenol-containing wastewater, microbubbles continuously generate hydroxyl radicals, requiring 60 minutes to complete deep mineralization.

[0080] For advanced purification of low-concentration pollutants, such as wastewater treatment plant effluent or drinking water purification, sufficient contact time is required. Microbubbles should remain in drinking water plants for 30–60 minutes to ensure complete oxidation of organic matter. Microbubble aeration in aeration tanks needs to be combined with biochemical reactions, and the entire process still requires 4–8 hours.

[0081] The microbubble deodorization process in this embodiment saves 30-50% of energy compared to traditional aeration. The catalyst can be reused and it can treat complex odors containing sulfur, nitrogen, and organic components. Furthermore, due to the combination of dynamic mixing and static treatment, the deep oxidation products are CO2, H2O, and inorganic salts. There is no need to use ozone and no toxic byproducts are generated, achieving efficient and low-energy treatment of odors. It is suitable for scenarios such as sewage treatment plants or chemical industrial parks.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A microbubble deodorization device, characterized in that: It includes a material and slag gas collection and settling chamber (1), a fiberglass washing tower (2), a stainless steel spray tower (3), a chiller cooling tower (4), a waste gas oxidation tower (5), a fan (6), a microbubble tower assembly (7), and an exhaust duct (8) connected in sequence. The microbubble tower assembly (7) includes a base (701), a plurality of spray cylinders (702) disposed on the base (701), a top seat (703) disposed on the upper part of the spray cylinders (702), and a spray assembly disposed in the top seat (703); The base (701) is provided with an air collection chamber (7011) that communicates with the outlet of the fan (6), and a through pipe is formed inside the spray cylinder (702); The spray assembly includes a spray section (704) located on the top base (703) and a circulation pipeline (705). The circulation pipeline (705) is provided with a gas-liquid mixing component (706) arranged along the water flow direction. The gas-liquid mixing component (706) is provided with a connecting pipe (707) communicating with the gas collection chamber (7011). The circulation pipeline (705) is provided with a connecting part (708) communicating with each of the spray cylinders (702). The base (701) is provided with a liquid collection chamber (7012) communicating with the spray cylinders (702).

2. The microbubble deodorization device according to claim 1, characterized in that: The gas-liquid mixing component (706) has a pressurizing chamber (7061) formed inside. The pressurizing chamber (7061) is in the same direction as the water flow in the circulation pipe (705). The connecting pipe (707) is set perpendicular to the pressurizing chamber (7061). When the water flow in the circulation pipe (705) passes through the pressurizing chamber (7061), part of the airflow in the gas collecting chamber (7011) enters the pressurizing chamber (7061).

3. The microbubble deodorization device according to claim 2, characterized in that: The top seat (703) has a cavity (7031) formed inside. The upper part of the top seat (703) is also provided with an air outlet (7032) that communicates with the cavity (7031). The exhaust duct (8) communicates with the air outlet (7032). The pipe connects the air collection chamber (7011) and the cavity (7031).

4. The microbubble deodorization device according to claim 3, characterized in that: The base (701) is provided with a liquid collection frame, the liquid collection cavity (7012) is formed in the liquid collection frame, and the gas collection cavity (7011) is provided in the liquid collection frame; The circulation pipeline (705) includes a first pipeline (7051) and a second pipeline (7052) disposed on both sides of the spray section (704), and a third pipeline (7053) connecting the first pipeline (7051) and the second pipeline (7052). The gas-liquid mixing element (706) is respectively provided between the third pipeline (7053) and the first pipeline (7051), and between the third pipeline (7053) and the second pipeline (7052).

5. The microbubble deodorization device according to claim 4, characterized in that: The third pipeline (7053) is equipped with a high-pressure pump (711) near the gas-liquid mixer (706).

6. The microbubble deodorization device according to claim 5, characterized in that: The connecting part (708) includes a return pipe (7081) connected to the first pipe (7051) and the second pipe (7052). The return pipe (7081) is provided with an injection pipe (7082) communicating with the spray cylinder (702). A first shut-off valve (709) is provided on the return pipe (7081). A second shut-off valve (710) is also provided on the first pipe (7051) and the second pipe (7052). The second shut-off valve (710) is used to control the opening and closing of the water path of the spray section (704).

7. The microbubble deodorization device according to claim 6, characterized in that: The liquid collection frame is provided with a box body (7013), and the gas collection chamber (7011) is formed inside the box body (7013). The lower part of the box body (7013) is provided with a drive unit (7014). The box body (7013) is provided with a blade (7015) connected to the power output end of the drive unit (7014). The drive unit (7014) drives the blade (7015) to rotate.

8. The microbubble deodorization device according to claim 7, characterized in that: The gas-liquid mixing component (706) includes a lower connector (7062) and an upper connector (7063), and a partition (7064) disposed between the upper connector (7063) and the lower connector (7062); The connecting pipe (707) is connected to one side of the upper connecting body (7063); The pressurization chamber (7061) is formed inside the upper connector (7063), the lower connector (7062) has an air inlet chamber (7065) formed inside, and the upper end of the upper connector (7063) has an air outlet chamber (7066).

9. The microbubble deodorization device according to claim 8, characterized in that: The pressurization chamber (7061) includes a cylindrical chamber (70611), a first conical chamber (70622), a second conical chamber (70623), and a flow-limiting chamber (70624), wherein the flow-limiting chamber (70624) is connected to the exhaust chamber (7066); The connecting pipe (707) is disposed between the box body (7013) and the upper connecting body (7063), and the connecting pipe (707) connects the gas collecting chamber (7011) and the cylindrical cavity (70611).

10. A microbubble deodorization process, characterized in that: The steps for treating industrial waste gas using the microbubble deodorization device as described in claim 8 are as follows: S1, the exhaust gas enters the feed inlet of the slag gas collection and settling chamber (1) through a closed pipe. After sedimentation by the screen, large particles of impurities are initially separated. The gas enters the bottom air inlet of the fiberglass washing tower (2) from the top outlet of the slag gas collection and settling chamber (1) for absorption and cooling of water-soluble pollutants. S2, the gas obtained in step S1 is connected from the clean gas outlet at the top of the fiberglass scrubbing tower (2) to the bottom air inlet of the stainless steel spray tower (3) through a flange, and the acidic gas is neutralized by alkaline spraying inside the stainless steel spray tower (3). S3, the gas obtained in step S2 is connected from the top outlet of the stainless steel spray tower (3) through the heat-insulated air duct to the inlet of the refrigeration cooling tower (4) to cool the gas to 20-40℃; S4, the gas cooled in step S3 enters the inlet at the bottom of the waste gas oxidation tower (5) and hydrogen peroxide is introduced to remove organic waste gas; S5, the gas obtained in step S4 is connected from the outlet of the waste gas oxidation tower (5) to the inlet of the blower (6) through the duct. The blower (6) provides negative pressure suction to drive the airflow of the system and maintains a constant gas velocity of 0.5-1.5m / s. S6, the gas obtained in step S5 is connected from the outlet of the blower (6) to the gas collection chamber (7011) in the base (701) of the microbubble tower component, and enters the circulation pipeline (705) in the form of a high-density micro-nano bubble group through the gas-liquid mixing component (706). An oxidant or alkaline solution is injected into the circulation pipeline (705). S7, close the second shut-off valve (710), open the first shut-off valve (709), and the mixed liquid enters the spray cylinder (702) from the return pipe (7081) and flows into the collection chamber (7012); the cycle is run a predetermined number of times or for a predetermined time. S8. When the requirements are met, the first shut-off valve (709) is closed and the second shut-off valve (710) is opened. The mixture is sprayed out from the spray section (704) through the second pipeline (7052) and the third pipeline (7053). The gas and liquid are separated and the purified gas is discharged from the exhaust pipe.

Images