Discharge flue negative oxygen ion emission device for industrial waste gas treatment

Abstract

The invention discloses a discharge flue negative oxygen ion emission device for industrial waste gas treatment, relates to the technical field of negative oxygen ion emission devices, solves the technical problem that an electrode is directly exposed and is easily polluted in the existing technical scheme, comprises an emission cylinder, and is characterized in that the emission cylinder is arranged in a flue and / or at the side part of the flue; according to the flue gas emission device, the emission needle is driven to swing up and down by adjusting the linkage mechanism, and the device can adjust the emission angle according to the change of the flow speed in the flue. The radial component is increased to cover the central area at low flow speed, and the axial component is increased to utilize kinetic energy compensation at high flow speed, so that the negative oxygen ions can effectively cover the section of the flue under different working conditions. A physical protection barrier is provided for the emission needle, and the damage of smoke dust and corrosive substances to the electrode is reduced. And the corrosion-resistant and high-temperature-resistant coating is matched, so that the maintenance frequency of the equipment is obviously reduced.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a negative oxygen ion emission device for industrial waste gas treatment in flue gas ducts. Background Technology

[0002] In the field of industrial waste gas treatment, negative ion dust removal technology generates negative oxygen ions through high-voltage discharge, causing dust particles in the flue gas to become charged and agglomerate and settle, making it a highly efficient physical dust removal method. However, existing negative ion emission devices still have the following limitations in practical applications: the exhaust velocity of industrial flues often fluctuates with the production load. Most existing emission needles are fixedly installed; when the flue gas velocity is low, the ion flow is prone to uneven diffusion; when the flue gas velocity is high, the ion flow often struggles to penetrate the mainstream flue gas to reach the center of the flue, resulting in unstable dust removal efficiency. If the emission needle is directly exposed to flue gas with complex composition, dust adhesion and chemical corrosion will quickly destroy the tip discharge effect, leading to increased discharge voltage, decreased ion generation, and shortened equipment maintenance cycles. The density distribution of negative oxygen ion clouds generated by static emission methods is uneven, and due to the lack of effective carrier guidance, the probability of ions colliding with dust particles after entering the flue is low, limiting the overall purification effect.

[0003] Existing technical solutions suffer from the problem of electrodes being directly exposed and susceptible to contamination. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a negative oxygen ion emission device for industrial waste gas treatment in flue gas ducts, which solves the technical problem that existing technical solutions have electrodes that are directly exposed and susceptible to pollution.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a negative oxygen ion emission device for industrial waste gas treatment in flue gas ducts, comprising an emission cylinder disposed inside and / or on the side of the flue gas duct, an air inlet at the bottom of the emission cylinder for clean gas to enter, and an outlet at the top of the emission cylinder, the outlet opening into the flue gas duct; an emission ring is fixedly disposed inside the emission cylinder, the emission ring being coaxially arranged with the emission cylinder, and multiple emission needles are disposed on the emission ring, at least two of the multiple emission needles being distributed along the axial direction of the emission cylinder, the emission needles being connected to a high-voltage pulse power supply for tip discharge to generate negative oxygen ions; by placing the emission cylinder inside or on the side of the flue gas duct, a relatively independent negative oxygen ion generation environment is constructed. Introducing clean gas as a carrier through the air inlet at the bottom avoids high-concentration dust in the flue gas duct from directly adhering to the emission needles, reducing the risk of electrode contamination. The coaxial arrangement of the emission ring and the emission cylinder, combined with the axially arrayed emission needles, ensures the uniform distribution of negative oxygen ions within the cylinder space. Using a high-voltage pulse power supply to drive tip discharge, a high concentration of negative oxygen ion flow can be generated with low energy consumption. This flow is then introduced into the flue through the delivery of clean gas, achieving dust reduction pretreatment of industrial waste gas.

[0006] In some embodiments, a plurality of the launching rings are arranged axially inside the launching tube, and the launching needles are arranged in a multi-layer array.

[0007] In some embodiments, the launching tube is provided with an adjustment linkage mechanism, which is provided with a linkage rod connected to the tail of the launching needle to adjust the orientation of the needle tip.

[0008] In some embodiments, an electric push rod is provided inside the launching tube, and a linkage ring is provided at the telescopic end of the electric push rod. One end of the linkage rod is sleeved on the linkage ring, and the launching direction of the launching needle is adjusted by extending or shortening the free end of the electric push rod.

[0009] In some embodiments, the outlet of the launch tube is connected to a Laval nozzle to increase the ejection velocity of the clean gas mixed with the negative oxygen ions.

[0010] In some embodiments, a rotatable swirl plate is provided inside the launching tube, at least a portion of which is located between the air inlet and the air outlet for swirling the clean gas.

[0011] In some embodiments, the outer wall of the launch tube is provided with a corrosion-resistant and high-temperature-resistant coating.

[0012] In some embodiments, the air inlet of the launch tube is provided with an air inlet pipe, and the input end of the air inlet pipe is provided with an air pump for pumping in the clean gas.

[0013] Beneficial Effects: This invention provides a negative oxygen ion emission device for industrial waste gas treatment in flues. The device drives the emission needle to swing up and down via an adjustable linkage mechanism, allowing the emission angle to be adjusted according to changes in the flow velocity within the flue. At low flow velocities, the radial component is increased to cover the central area, while at high flow velocities, the axial component is increased to utilize kinetic energy compensation, ensuring that negative oxygen ions effectively cover the flue cross-section under different operating conditions, thus improving dust reduction efficiency. By introducing fresh clean gas from the bottom and creating a slightly positive pressure environment within the cylinder, a physical protective barrier is provided for the emission needle, reducing the damage to the electrodes from flue dust and corrosive substances. Combined with a corrosion-resistant and high-temperature-resistant coating, the maintenance frequency of the equipment is significantly reduced. The internal swirl plate creates a swirling flow of clean gas, extending the gas path in the discharge area and increasing the ion carrying capacity per unit volume of gas. The spirally discharged airflow has better diffusion properties, facilitating thorough mixing of negative oxygen ions with the flue gas. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a negative oxygen ion emission device for industrial waste gas treatment in a flue gas duct, as described in this invention.

[0015] Figure 2 This is a top view schematic diagram of a negative oxygen ion emission device for industrial waste gas treatment according to the present invention.

[0016] Figure 3 This is a schematic diagram of the main cross-sectional structure of a negative oxygen ion emission device for industrial waste gas treatment according to the present invention.

[0017] Figure 4 This is a partial structural schematic diagram of the main view cross-section of a negative oxygen ion emitting device for industrial waste gas treatment according to the present invention.

[0018] In the diagram: 1. Launch tube; 2. Air inlet; 3. Exit outlet; 4. Launch ring; 5. Launch needle; 6. Linkage rod; 7. Electric push rod; 8. Linkage ring; 9. Laval nozzle; 10. Swirl plate; 11. Air inlet pipe; 12. Air pump. Detailed Implementation

[0019] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Detailed description follows.

[0020] Please see Figure 1-4This invention provides a technical solution: a negative oxygen ion emission device for industrial waste gas treatment in flue gas ducts, comprising an emission cylinder 1, which is disposed inside and / or on the side of the flue gas duct. An air inlet 2 is provided below the emission cylinder 1 for clean gas to enter, and an outlet 3 is provided above the emission cylinder 1. The emission cylinder 1 is provided with an emission ring 4, which is coaxially arranged with the emission cylinder 1. Multiple emission needles 5 are arranged on the emission ring 4 in an axial array. The emission needles 5 are connected to a high-voltage pulse power supply for tip discharge to generate negative oxygen ions. By placing the emission cylinder 1 inside or on the side of the flue gas duct, a relatively independent negative oxygen ion generation environment is created. Introducing clean gas as a carrier through the lower air inlet 2 avoids high-concentration dust in the flue gas duct from directly adhering to the emission needles 5, reducing the risk of electrode contamination. The coaxial arrangement of the emission ring 4 and the axially arrayed emission needles 5 ensures a uniform distribution of negative oxygen ions within the cylinder. Using a high-voltage pulse power supply to drive tip discharge, a high concentration of negative oxygen ion flow can be generated with low energy consumption. This flow is then introduced into the flue through the delivery of clean gas, achieving dust reduction pretreatment of industrial waste gas.

[0021] In some embodiments, multiple emission rings 4 are arranged axially inside the emission cylinder 1, and the emission needles 5 are arranged in a multi-layer array. By arranging multiple emission rings 4 axially to form a multi-layer array, the total amount of negative oxygen ions generated per unit time is increased. The multi-layer distribution allows the clean gas to fully contact the ion clouds generated by multiple sets of emission needles 5 as it flows through the emission cylinder 1, improving the ion concentration saturation of the discharged gas and thus enhancing the subsequent dust reduction efficiency in the flue.

[0022] In some embodiments, an adjustment linkage mechanism is provided inside the emission tube 1. The adjustment linkage mechanism is provided with a linkage rod 6, which is connected to the tail of the emission needle 5 to adjust the tip orientation of the emission needle 5. By driving the linkage rod 6 through the adjustment linkage mechanism, the dynamic adjustment of the tip orientation of the emission needle 5 is realized. This structure allows the vector direction of ion emission to be adjusted according to the real-time flow rate of the exhaust gas in the flue: at low flow rates, by adjusting the tip to be deflected radially, more ions are concentrated in the central region of the flue; at high flow rates, by adjusting the tip to be deflected axially, the emission momentum is used to compensate for the exhaust gas flow rate, ensuring that negative oxygen ions can effectively diffuse into the exhaust gas flow field.

[0023] In some embodiments, an electric push rod 7 is provided inside the emission tube 1. A linkage ring 8 is provided at the telescopic end of the electric push rod 7. One end of a linkage rod 6 is sleeved on the linkage ring 8. The emission direction of the emission needle 5 is adjusted by extending or shortening the telescopic end of the electric push rod 7. The structure of the electric push rod 7 and linkage ring 8 converts the linear motion of the push rod into the oscillation of the linkage rod 6, achieving precise control of the angle of the emission needle 5. This structure possesses strong self-locking and stability, maintaining the preset ejection angle of the emission needle 5 even in industrial environments with high-frequency vibration or airflow impact, ensuring the accuracy of the ion emission trajectory.

[0024] In some embodiments, the outlet 3 of the launching tube 1 is provided with a Laval nozzle 9 to increase the ejection velocity of the clean gas mixed with negative oxygen ions. The Laval nozzle 9, with its cross-sectional change of first contracting and then expanding, converts the pressure potential energy of the clean gas carrying negative oxygen ions into kinetic energy. This acceleration effect significantly increases the ejection velocity of the ion stream, enabling it to overcome the resistance of the mainstream flue gas in the flue, penetrate deep into the center of the flue, and expand the contact coverage between negative oxygen ions and dust particles.

[0025] In some embodiments, a swirl plate 10 is provided inside the emission tube 1, positioned above the air inlet 2, for swirling the clean gas. The swirl plate 10 above the air inlet 2 creates a rotating flow field in the incoming clean gas. The swirling motion prolongs the residence time of the gas within the emission tube 1, allowing for more thorough contact between the gas and the discharge area at the tip of the emission needle 5, thus improving the ion capture rate. The discharged swirl has better diffusivity, facilitating the rapid mixing of negative oxygen ions with the exhaust gas after entering the flue.

[0026] In some embodiments, the outer wall of the launch tube 1 is provided with a corrosion-resistant and high-temperature-resistant coating. This coating provides a physical protective barrier for the launch tube 1, enabling it to resist the erosion of acidic gases and the effects of high-temperature heat flow that may be present in industrial flue gas. This effectively extends the service life of the device under harsh operating conditions and reduces the risk of structural failure due to oxidation or corrosion of the casing.

[0027] In some embodiments, the air inlet 2 of the emitter tube 1 is provided with an air inlet pipe 11, and an air pump 12 is provided at the input end of the air inlet pipe 11 for pumping in clean gas. The air pump 12 forcibly injects clean gas into the emitter tube 1 through the air inlet pipe 11, establishing a slightly positive pressure environment inside the emitter tube 1 relative to the inside of the flue. This positive pressure environment not only provides a stable transport power for negative oxygen ions, but also plays an active anti-clogging role, preventing the backflow of exhaust gas in the flue into the emitter tube 1, and protecting the operating environment of the internal precision discharge components.

[0028] like Figure 1-4As shown, the air pump 12 is activated by an external controller, and clean gas enters through the air inlet 2 below the emitter tube 1 via the air inlet pipe 11. When the gas passes through the swirl plate 10, it is guided by the blades of the swirl plate 10, changing from axial linear motion to a spiral upward swirling state. This swirling field prolongs the residence time of the clean gas in the emitter tube 1 and provides a stable flow field basis for the subsequent uniform mixing of negative oxygen ions. When the high-voltage pulse power supply is connected, electrical energy is transmitted through wires to the emitter needles 5 set on each layer of the emitter ring 4. Under the action of the high-voltage pulse, the tip of the emitter needle 5 generates a corona discharge, ionizing the clean gas molecules around the emitter needle 5, thereby generating a high-concentration cloud of negative oxygen ions. Because the clean gas is in a spiral upward state, the generated negative oxygen ions are quickly captured and entrained by the swirling gas, forming an active airflow carrying a large number of negative oxygen ions. Based on real-time monitoring of the exhaust gas velocity within the flue, the control system drives the electric push rod 7 within the launching tube 1 to perform the following actions: Low velocity condition: When the flue gas exhaust velocity is detected to be low, the electric push rod 7 drives the linkage ring 8 to move, which in turn drives the launching needle 5 to swing radially towards the launching tube 1 via the linkage rod 6. The needle tip points towards the center region of the launching tube 1 cross-section, ensuring that negative oxygen ions can directly enter the core flow field of the swirling gas, preventing premature neutralization of ions on the flue wall due to slow flow velocity. High velocity condition: When the flue gas exhaust velocity is detected to be high, the electric push rod 7 drives the linkage ring 8 in the opposite direction, causing the linkage rod 6 to drive the launching needle 5 to swing axially (i.e., in the exhaust direction) towards the launching tube 1. By adjusting the emission vector, the resistance of the ion flow entering the flue is reduced, and the injection momentum is used to increase the depth of negative oxygen ions entering the flue. The airflow carrying negative oxygen ions enters the Laval nozzle 9 structure when it rises to the exhaust port 3 at the top of the launching tube 1. According to the Venturi effect, when the airflow passes through the contraction and diffusion sections of the nozzle, pressure energy is converted into momentum, and the airflow velocity is significantly increased. The accelerated ion stream is injected into the flue gas at a preset vector angle. The negative oxygen ions injected into the flue gas rapidly diffuse and collide with dust particles in the exhaust gas. Through charge transfer, the dust particles become charged, and the charged dust particles agglomerate into larger particles under the influence of electrostatic attraction. Finally, they settle under gravity or are captured in subsequent dust removal equipment, thereby achieving the purification of industrial waste gas.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A negative oxygen ion emitting device for industrial waste gas treatment in flue gas ducts, comprising an emitting tube (1), characterized in that, The emitting tube (1) is disposed inside and / or on the side of the flue. One end of the emitting tube (1) is provided with an air inlet (2) for clean gas to enter. The other end of the emitting tube (1) is provided with an outlet (3) which is open to the inside of the flue. An emitting ring (4) is fixedly disposed inside the emitting tube (1). The emitting ring (4) is coaxially disposed with the emitting tube (1). Multiple emitting needles (5) are disposed on the emitting ring (4). At least two of the multiple emitting needles (5) are distributed along the axial direction of the emitting tube (1). The emitting needles (5) are connected to a high-voltage pulse power supply to perform tip discharge to generate negative oxygen ions.

2. The negative oxygen ion emitting device for industrial waste gas treatment in a flue gas duct according to claim 1, characterized in that, Multiple launching rings (4) are arranged axially inside the launching tube (1), and the launching needles (5) are arranged in a multi-layer array.

3. The negative oxygen ion emitting device for industrial waste gas treatment in a flue gas duct according to claim 1, characterized in that, The launching tube (1) is provided with a linkage rod (6), which is connected to the tail of the launching needle (5) to adjust the orientation of the needle tip of the launching needle (5).

4. The negative oxygen ion emitting device for industrial waste gas treatment in a flue gas duct according to claim 3, characterized in that, An electric push rod (7) is provided inside the launching tube (1). A linkage ring (8) is provided at the free end of the electric push rod (7). One end of the linkage rod (6) is sleeved on the linkage ring (8). The launching direction of the launching needle (5) is adjusted by extending or shortening the telescopic end of the electric push rod (7).

5. The negative oxygen ion emitting device for industrial waste gas treatment in a flue gas duct according to claim 1, characterized in that, The outlet (3) of the launch tube (1) is connected to a Laval nozzle (9) to increase the ejection velocity of the clean gas mixed with the negative oxygen ions.

6. The negative oxygen ion emitting device for industrial waste gas treatment in a flue gas duct according to claim 1, characterized in that, The launch tube (1) is provided with a rotatable swirl plate (10), at least a portion of which is located between the air inlet (2) and the air outlet, for swirling the clean gas.

7. The negative oxygen ion emitting device for industrial waste gas treatment in a flue gas duct according to claim 1, characterized in that, The outer wall of the launch tube (1) is provided with a corrosion-resistant and high-temperature resistant coating.

8. The negative oxygen ion emitting device for industrial waste gas treatment in a flue gas duct according to claim 1, characterized in that, The air inlet (2) of the launch tube (1) is provided with an air inlet pipe (11), and the input end of the air inlet pipe (11) is provided with an air pump (12) for pumping in the clean gas.

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