A system for treating carbon rod wax immersion waste gas by adopting superoxygen micro-nano bubbles

Abstract

The utility model relates to carbon stick production technical field, concretely relates to a system of carbon stick waxing waste gas is handled with superoxygen micro -nano bubble, including: primary spray cooling device, secondary cyclone spray cooling device, including secondary liquid pool, processing tower, the cyclone sprayer of setting at the top of processing tower and the cyclone sprayer of setting at secondary liquid pool liquid surface, and the cyclone sprayer carries out secondary cooling to paraffin steam, the cyclone sprayer above the liquid surface of secondary liquid pool provides power and collects after paraffin on the liquid surface of secondary liquid pool is concentrated, superoxygen micro -nano bubble processing device, with through draught fan and processing tower intercommunication, including main water tank, the exhaust gas treatment generator of setting on main water tank, mixed fan, gas -water separator and outlet pipe, the sidewall of exhaust gas treatment generator is connected high pressure pump through high pressure pipe, high pressure pump and main water tank intercommunication. The above -mentioned system exhaust gas treatment effect is good.

Description

Technical Field

[0001] This utility model relates to the field of carbon rod production technology, specifically to a system for treating waste gas from carbon rod wax impregnation using superoxide micro-nano bubbles. Background Technology

[0002] Carbon rod processing requires a wax impregnation process. When the carbon rod enters the high-temperature zone, the paraffin wax impregnated on its surface melts and evaporates rapidly, forming a white paraffin mist and aerosol. If the local temperature is too high (usually >250℃), some of the paraffin wax will undergo pyrolysis, producing smaller molecules of alkanes, alkenes, and even trace amounts of polycyclic aromatic hydrocarbons (PAHs). Small amounts of organic or inorganic impurities that may remain in the carbon rod during production will be released at high temperatures.

[0003] The existing waste gas treatment method involves the high-temperature waste gas first entering a condensation and recovery unit, where its temperature is indirectly cooled to below the paraffin dew point. This process efficiently condenses and recovers gaseous paraffin vapor into liquid form. After pretreatment, residual oil mist particles and aerosols in the waste gas are treated using filter cotton and activated carbon, and then guided to the chimney by an induced draft fan to achieve compliant emissions. The existing problems are that activated carbon exhibits poor activity upon contact with water, and wax particles clog the activated carbon. Utility Model Content

[0004] The technical problem this utility model aims to solve is to overcome the shortcomings and defects mentioned in the background art above, and to provide a system for treating carbon rod wax impregnation waste gas using superoxide micro-nano bubbles, which simplifies the treatment process and has a good waste gas treatment effect. To solve the above technical problem, the technical solution proposed by this utility model is as follows: A system for treating carbon rod wax impregnation waste gas using superoxide micro-nano bubbles includes: a primary spray cooling device, comprising a treatment chamber, a primary sprayer installed at the top of the treatment chamber, and a primary liquid receiving tank installed at the bottom of the treatment chamber, wherein the primary sprayer performs primary spray cooling on the paraffin vapor. A two-stage cyclone spray cooling device includes a two-stage liquid receiving tank, a treatment tower, a cyclone sprayer installed at the top of the treatment tower, and a cyclone sprayer installed on the liquid surface of the two-stage liquid receiving tank. The air inlet of the treatment tower is connected to the treatment chamber, and a liquid storage pipe is connected to the side wall of the treatment tower. The liquid storage pipe is connected to the cyclone sprayer. The cyclone sprayer performs secondary cooling on the paraffin vapor. The cyclone sprayer located above the liquid surface of the two-stage liquid receiving tank provides power to collect the paraffin vapor on the liquid surface of the two-stage liquid receiving tank. The superoxide micro-nano bubble treatment device, connected to the treatment tower via an induced draft fan, includes a main water tank, a waste gas treatment generator installed on the main water tank, a mixing fan, a gas-liquid separator, and an outlet pipe; a high-pressure pump is connected to the side wall of the waste gas treatment generator via a high-pressure pipe, and the high-pressure pump is connected to the main water tank.

[0005] In one embodiment, both the primary and secondary receiving tanks are equipped with filter screens, and the water is filtered through the filter screens and then connected to the storage pipeline for recycling.

[0006] In one embodiment, the nozzle of the cyclone sprayer located on the liquid surface of the secondary receiving tank is a wide-angle fan-shaped nozzle. A paraffin wax collection port is provided on one side wall of the secondary receiving tank. The spray direction of the wide-angle fan-shaped nozzle is directly facing the paraffin wax collection port, and the paraffin wax on the liquid surface is guided to the paraffin wax collection port by the water flow.

[0007] In one embodiment, a removable wax block collection box is provided on the pool wall where the paraffin collection port is located.

[0008] In one embodiment, the waste gas treatment generator is a tubular structure filled with honeycomb catalyst packing.

[0009] In one embodiment, a level gauge is provided in the main water tank, a clean water tank is provided between the high-pressure pump and the main water tank, a filter is provided on the clean water tank, and the clean water tank is connected to the main water tank through a circulation pump.

[0010] In one embodiment, the exhaust pipe is equipped with an online exhaust gas monitoring instrument for real-time monitoring of the composition of the final emitted gas.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: In the above-mentioned system for treating carbon rod wax-impregnated waste gas using superoxide micro-nano bubbles, paraffin vapor undergoes initial rapid cooling at the top of the treatment chamber of the spray cooling device, and secondary cyclone spraying performs deep cooling and washing within the tower. This maximizes the utilization of water's heat absorption capacity, rapidly reducing the high-temperature waste gas to near room temperature. Centrifugal force is used to efficiently separate the mist droplets and condensed liquid wax from the gas, significantly improving the physical removal rate of larger particles and oil mist. The sprayer located above the liquid surface of the secondary receiving tank generates a driving force on the water surface through spraying power, causing hydrophobic paraffin to accumulate and enrich on the liquid surface, facilitating subsequent skimming or dedicated collection. This achieves resource recovery of waste wax, turning waste into treasure and reducing operating costs. Through spray washing, most of the paraffin that would condense and adhere to pipes and equipment is removed in advance, fundamentally avoiding blockages and malfunctions in subsequent systems (especially pipes and fans) caused by wax condensation. At the moment of collapse, superoxide micro-nano bubbles generate local high-temperature and high-pressure hot spots at the gas-water interface, which decompose water molecules to produce a large number of hydroxyl radicals (·OH). Their oxidation capacity far exceeds that of ozone and chlorine. They can completely convert VOCs and odor molecules dissolved in water in waste gas into carbon dioxide and water without selectivity, thus fundamentally solving the problem of toxic and harmful gas emissions. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a system structure for treating exhaust gas from carbon rod wax impregnation using superoxide micro-nano bubbles, according to one embodiment.

[0014] Reference numerals in the attached diagram: 1: Primary spray cooling device; 2: Secondary cyclone spray cooling device; 3: Exhaust fan; 4: Treatment tower; 5: Waste gas treatment generator; 6: Mixing fan; 7: Gas-water separator; 8: Outlet pipe; 9: High-pressure pipe; 10: High-pressure pump; 11: Clean water tank; 12: Circulation pump; 13: Main water tank; 14: Level gauge; 15: Filter. Detailed Implementation

[0015] To facilitate understanding of this utility model, the following description will be provided in more comprehensive and detailed manner with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0016] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.

[0017] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0018] Please see Figure 1One embodiment of the system for treating carbon rod wax impregnation waste gas using superoxide micro-nano bubbles mainly includes: a primary spray cooling device 1, a secondary cyclone spray cooling device 2, an induced draft fan 3, and a superoxide micro-nano bubble treatment device. Specifically, the primary spray cooling device 1 includes a treatment chamber, a primary sprayer installed at the top of the treatment chamber, and a primary liquid receiving tank installed at the bottom of the treatment chamber. The primary sprayer performs primary spray cooling on the paraffin vapor. The secondary cyclone spray cooling device 2 includes a secondary liquid receiving tank, a treatment tower 4, a cyclone sprayer installed at the top of the treatment tower 4, and a cyclone sprayer installed on the liquid surface of the secondary liquid receiving tank. The air inlet of the treatment tower 4 is connected to the treatment chamber, and a liquid storage pipe is connected to the side wall of the treatment tower 4. The liquid storage pipe is connected to the cyclone sprayer. The cyclone sprayer performs secondary cooling on the paraffin vapor. The cyclone sprayer located above the liquid surface of the liquid receiving tank provides power to collect the paraffin on the liquid surface of the secondary liquid receiving tank. The superoxide micro-nano bubble treatment device is connected to the treatment tower 4 via an induced draft fan 3. It includes a main water tank 13, a waste gas treatment generator 5 mounted on the main water tank 13, a mixing fan 6, a gas-water separator 7, and an outlet pipe 8. A high-pressure pump 10 is connected to the side wall of the waste gas treatment generator 5 via a high-pressure pipe 9, and the high-pressure pump 10 is connected to the main water tank 13. The induced draft fan 3 provides negative pressure, causing paraffin vapor to be transported from the primary spray cooling device 1 and the secondary cyclone spray cooling device 2 to the superoxide micro-nano bubble treatment device. The superoxide micro-nano bubble treatment device employs advanced oxidation technology combining physical and chemical processes to thoroughly decompose and remove pollutants, ensuring emissions meet standards and eliminating odors. The exhaust gas from the secondary cyclone spray cooling treatment is drawn into the superoxide micro-nano bubble treatment device through a pipe by the induced draft fan 3. The exhaust gas then enters the mixing fan 6. The exhaust gas is forcibly mixed with circulating water from the main water tank 13 to form a gas-water mixture. The gas-water mixture is drawn into the high-pressure pump 10 and pressurized to a high-pressure state (typically 0.3 MPa - 0.8 MPa), reaching a "supersaturated" state. The high-pressure gas-water mixture is then transported to the waste gas treatment generator 5 through the high-pressure pipe 9. When the high-pressure fluid passes through a tiny opening at the end of the waste gas treatment generator 5, the pressure drops instantaneously. The gas, previously forcibly dissolved in the water, rapidly precipitates due to the sharp decrease in solubility. Due to the drastic pressure change and the shearing effect of the liquid, the precipitated gas cannot form large bubbles, but instead generates countless micro-nano bubbles with diameters ranging from tens of nanometers to tens of micrometers. The fluid rich in micro-nano bubbles is injected into the main water tank 13 from the bottom or side wall of the generator. The micro-nano bubbles concentrate pollutants on their surface, greatly improving reaction efficiency. At the moment of collapse, superoxide micro-nano bubbles generate local high-temperature and high-pressure hot spots at the gas-water interface, which break down water molecules to produce a large number of hydroxyl radicals (·OH). These radicals indiscriminately and non-selectively attack almost all organic molecules in the exhaust gas, oxidizing and decomposing them into small molecule organic matter, carbon dioxide, and water, thus achieving harmless treatment of the exhaust gas.

[0019] Preferably, in one embodiment, the nozzle of the cyclone sprayer located on the liquid surface of the secondary receiving tank is a wide-angle fan-shaped nozzle. A paraffin wax collection port is provided on one side wall of the secondary receiving tank, and the spray direction of the wide-angle fan-shaped nozzle is directly facing the paraffin wax collection port, using water flow to guide the paraffin wax on the liquid surface to the paraffin wax collection port. A detachable wax block collection box is provided on the tank wall where the paraffin wax collection port is located.

[0020] Preferably, the main water tank 13 is equipped with a level gauge 14, a clean water tank 10 is provided between the high-pressure pump 10 and the main water tank 13, the clean water tank 10 is equipped with a filter 15, and the clean water tank 10 is connected to the main water tank 13 through a circulation pump 12.

[0021] Preferably, in one embodiment, the exhaust gas treatment generator 5 has a tubular structure and is filled with honeycomb catalyst packing. A high-pressure pump 10 injects the gas-water mixture tangentially from the bottom, creating a vortex and extending the residence time. A level gauge 14 is installed inside the main water tank 13. An online exhaust gas monitoring instrument is installed on the exhaust pipe 8 to monitor the composition of the final emitted gas in real time.

[0022] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A system for treating exhaust gas from carbon rod wax impregnation using superoxide micro-nano bubbles, characterized in that, include: The primary spray cooling device includes a treatment chamber, a primary sprayer installed at the top of the treatment chamber, and a primary liquid receiving tank installed at the bottom of the treatment chamber. The primary sprayer performs primary spray cooling on the paraffin vapor. A two-stage cyclone spray cooling device includes a two-stage liquid receiving tank, a treatment tower, a cyclone sprayer installed at the top of the treatment tower, and a cyclone sprayer installed on the liquid surface of the two-stage liquid receiving tank. The air inlet of the treatment tower is connected to the treatment chamber, and a liquid storage pipe is connected to the side wall of the treatment tower. The liquid storage pipe is connected to the cyclone sprayer. The cyclone sprayer performs secondary cooling on the paraffin vapor. The cyclone sprayer located above the liquid surface of the two-stage liquid receiving tank provides power to collect the paraffin vapor on the liquid surface of the two-stage liquid receiving tank. The superoxide micro-nano bubble treatment device, connected to the treatment tower via an induced draft fan, includes a main water tank, a waste gas treatment generator installed on the main water tank, a mixing fan, a gas-liquid separator, and an outlet pipe; a high-pressure pump is connected to the side wall of the waste gas treatment generator via a high-pressure pipe, and the high-pressure pump is connected to the main water tank.

2. The system for treating carbon rod wax impregnation waste gas using superoxide micro-nano bubbles according to claim 1, characterized in that, Both the primary and secondary liquid receiving tanks are equipped with filter screens. After being filtered by the filter screens, the water is connected to the liquid storage pipeline for recycling.

3. The system for treating carbon rod wax impregnation waste gas using superoxide micro-nano bubbles according to claim 1, characterized in that, The nozzle of the cyclone sprayer located on the liquid surface of the secondary liquid receiving tank is a wide-angle fan-shaped nozzle. A paraffin wax collection port is provided on one side wall of the secondary liquid receiving tank. The spray direction of the wide-angle fan-shaped nozzle is directly facing the paraffin wax collection port, and the water flow guides the paraffin wax on the liquid surface to the paraffin wax collection port.

4. The system for treating carbon rod wax impregnation waste gas using superoxide micro-nano bubbles according to claim 3, characterized in that, A removable wax block collection box is provided on the pool wall where the paraffin collection port is located.

5. The system for treating carbon rod wax impregnation waste gas using superoxide micro-nano bubbles according to claim 1, characterized in that, The waste gas treatment generator is a tubular structure, and its interior is filled with honeycomb catalyst packing.

6. The system for treating carbon rod wax impregnation waste gas using superoxide micro-nano bubbles according to claim 1, characterized in that, The main water tank is equipped with a level gauge, and a clean water tank is located between the high-pressure pump and the main water tank. The clean water tank is equipped with a filter, and the clean water tank is connected to the main water tank through a circulation pump.

7. The system for treating carbon rod wax impregnation waste gas using superoxide micro-nano bubbles according to claim 1, characterized in that, The exhaust pipe is equipped with an online exhaust gas monitoring instrument for real-time monitoring of the composition of the final emitted gas.

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