Flue gas treatment device of electric discharge machine for purification and treatment method of flue gas treatment device

Abstract

The invention discloses an electric discharge machine flue gas treatment device for purification and a treatment method thereof, and relates to the technical field of industrial flue gas purification, the electric discharge machine flue gas treatment device comprises a dust collection box, a smoke suction pipe is installed on the side edge of the dust collection box, a treatment box is installed on the upper side of the dust collection box, and a sealing cover is arranged on the upper side of the treatment box; a filter box is fixedly mounted on one side of the sealing cover in a penetrating manner; the dust removal structure comprises centrifugal blades, the centrifugal blades can separate particulate matter in smoke, the cleaning structure comprises a scraping and brushing plate, and the scraping and brushing plate can conduct scraping and brushing treatment on the inner wall of the treatment box; three core functions of centrifugal dust removal, water supply and inner wall scraping and brushing are driven at the same time through a single power source of rotation of the centrifugal blades; the linkage design does not need an additional motor, the structure is simplified, the cost and the energy consumption are reduced, automatic and continuous cleaning of the inner wall of the treatment box is achieved, pollutant accumulation is effectively prevented, and the maintenance requirement is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of industrial flue gas purification technology, specifically to a purification device and method for treating flue gas from an EDM machine. Background Technology

[0002] Electrical discharge machining (EDM) processes generate large amounts of high-temperature fumes containing oil mist and fine metal particles. Direct emission of these fumes severely pollutes the working environment and endangers the health of operators. Currently, common treatment methods often employ simple filtration or electrostatic precipitators, but these methods suffer from the following problems: First, high-temperature fumes easily damage precision filters; second, high concentrations of particulate matter quickly clog filter elements, leading to frequent maintenance and high costs; finally, traditional devices lack self-cleaning capabilities, and oily dust easily accumulates on the inner walls of the treatment chamber, forming stubborn dirt that affects long-term stable operation. Therefore, this paper provides a device and method for treating EDM fumes to address the problems mentioned in the background section. Summary of the Invention

[0003] The purpose of this invention is to provide a purification device and method for treating flue gas from an EDM machine, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A purification device for treating flue gas from an EDM machine includes a dust collection box, a smoke extraction pipe installed on the side of the dust collection box, a treatment box installed on the upper side of the dust collection box, a sealing cover provided on the upper side of the treatment box, and a filter box fixedly and through-installed on one side of the sealing cover; the interior of the treatment box is provided with a dust removal structure, which includes centrifugal blades capable of separating particulate matter in the smoke, and a cleaning structure is also provided above the centrifugal blades, which includes a scraper plate capable of scraping the inner wall of the treatment box.

[0006] As a further embodiment of the present invention: the dust removal structure further includes a fixed frame, the centrifugal blades are rotatably connected inside the fixed frame, the fixed frame is fixedly connected to the inner wall of the processing box, and multiple drainage troughs are provided on the fixed frame.

[0007] As a further embodiment of the present invention: a fixed ring plate is fixedly connected to the lower side of the fixed frame, a flexible water pipe is installed on the fixed ring plate, multiple rotating rods are fixedly connected to the lower side of the centrifugal blades, a squeezing ring is installed at one end of the rotating rods, the squeezing ring is in contact with the flexible water pipe, multiple spray heads and a ring-shaped fixed water pipe are installed on the inner wall of the treatment tank, the flexible water pipe is in communication with the spray heads and the fixed water pipe, and multiple leakage holes are opened on the bottom side of the fixed water pipe.

[0008] As a further embodiment of the present invention: the cleaning structure further includes a fixed gear ring, which is fixedly connected to the outside of the centrifugal blades. A double-ended gear is rotatably connected to the fixed frame. One end of the double-ended gear meshes with the fixed gear ring, and the other end of the double-ended gear meshes with a driven gear ring. The scraper is fixedly connected to the driven gear ring, and the driven gear ring is movably connected to the treatment box. The scraper is in contact with the inner wall of the treatment box.

[0009] As a further embodiment of the present invention: an auxiliary structure is installed on one side of the scraper plate, the auxiliary structure including a fixing tube, the fixing tube being fixedly connected to the scraper plate, a spring rod being installed inside the fixing tube, a reciprocating scraper rod being fixedly connected to the top end of the spring rod, a magnetic sealing plate being provided between the water leakage holes, the magnetic sealing plate being fixedly connected to the inner wall of the fixing water pipe by a fixing spring, a magnetic block with opposite magnetic properties being installed inside the reciprocating scraper rod, and both ends of the reciprocating scraper rod being in contact with the side wall of the scraper plate.

[0010] As a further embodiment of the present invention: an electrostatic filter is installed inside the filter box, and a HEPA filter, an activated carbon filter, and a centrifugal fan are respectively arranged below the electrostatic filter. The electrostatic filter, HEPA filter, activated carbon filter, and centrifugal fan are connected to the filter box by a pull-out method.

[0011] A method for treating flue gas from an EDM machine for purification includes:

[0012] S1: The flue gas passes through the centrifugal blades at high speed, and the particulate matter is separated from the flue gas and thrown out by centrifugal force;

[0013] S2: Using the rotational power of the centrifugal blades, the extrusion ring periodically extrudes the flexible water pipe, spraying water mist into the flue gas and rinsing the inner wall of the treatment tank;

[0014] S3: Using the rotational power of the centrifugal blades, drive the scraper to scrape off the contaminants remaining on the inner wall of the treatment chamber;

[0015] S4: The flue gas treated as described above is passed through electrostatic filtration, HEPA filtration and activated carbon filtration in sequence for deep purification before being discharged.

[0016] As a further aspect of the present invention: the squeezing force of the squeezing ring on the flexible water pipe is positively correlated with the rotational speed of the centrifugal blades: when the flue gas concentration is high, the rotational speed of the centrifugal blades increases, the squeezing frequency and force of the squeezing ring increase, and the water spray volume of the spray head and the water output of the fixed water pipe increase simultaneously, thereby enhancing the purification and cleaning effect; when the flue gas concentration is low, the rotational speed of the centrifugal blades decreases, the squeezing force decreases, and the water output decreases, thereby achieving dynamic adaptation of water resources.

[0017] As a further embodiment of the present invention: after the scraper blade leaves, the magnetic sealing plate is reset under the action of the fixing spring, and the leakage hole resumes normal water output.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. By combining centrifugal separation, water mist adsorption, and multi-stage filtration, the particulate matter in the flue gas is removed in a graded and efficient manner. The water mist not only adsorbs fine particles, but more importantly, it effectively cools the high-temperature flue gas, protecting the subsequent precision filter components and extending their service life.

[0020] 2. By using the single power source of centrifugal blade rotation, three core functions—centrifugal dust removal, water supply, and inner wall scraping—are simultaneously driven. This interconnected design eliminates the need for additional motors, simplifies the structure, reduces costs and energy consumption, and enables automatic and continuous cleaning of the inner wall of the treatment tank, effectively preventing the accumulation of pollutants and greatly reducing maintenance requirements.

[0021] 3. By automatically matching the water spray volume with the flue gas concentration (manifested as the centrifugal blade rotation speed), the energy-saving effect of "supplying only what is needed" is achieved; the auxiliary structure further enables the cleaning of the scraper itself, and the magnetic mechanism automatically increases the flushing water volume during cleaning, ensuring the stability and reliability of the system in long-term operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram showing the disassembly of the dust collection box structure and the processing box structure in this invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the filter box in this invention;

[0025] Figure 4 This is a schematic diagram of the flexible water pipe structure in this invention;

[0026] Figure 5 This is a schematic diagram of the centrifugal blade structure in this invention;

[0027] Figure 6This is a schematic diagram of the driven toothed ring structure in this invention;

[0028] Figure 7 This is a schematic diagram of the fixed toothed ring structure in this invention;

[0029] Figure 8 This is a schematic diagram of the internal structure of the fixed water pipe in this invention;

[0030] The correspondence between the labels and component names in the attached figures is as follows:

[0031] 1. Dust collection box; 101. Smoke pipe; 2. Processing box; 3. Dust removal structure; 301. Fixing frame; 302. Centrifugal blades; 303. Fixing ring plate; 304. Flexible water pipe; 305. Rotating rod; 306. Squeezing ring; 308. Spray head; 309. Fixing water pipe; 310. Sewage trough; 311. Leakage hole; 4. Cleaning structure; 401. Fixing gear ring; 402. Double-headed gear; 403. Scraper; 404. Driven gear ring; 5. Auxiliary structure; 501. Fixing pipe; 503. Spring rod; 504. Reciprocating scraper rod; 505. Magnetic sealing plate; 506. Fixing spring; 6. Filter box; 601. Electrostatic filter; 602. HEPA filter; 603. Activated carbon filter; 604. Centrifugal fan; 7. Sealing cover. Detailed Implementation

[0032] Please see Figures 1-8 A purification device for treating flue gas from an EDM machine includes a dust collection box 1, a smoke extraction pipe 101 installed on the side of the dust collection box 1, a treatment box 2 installed on the upper side of the dust collection box 1, a sealing cover 7 on the upper side of the treatment box 2, and a filter box 6 fixedly and through one side of the sealing cover 7; an electrostatic filter 601 is installed inside the filter box 6, and a HEPA filter 602, an activated carbon filter 603, and a centrifugal fan 604 are respectively arranged below the electrostatic filter 601; the electrostatic filter 601, HEPA filter 602, activated carbon filter 603, and centrifugal fan 604 are connected to the filter box 6 by a pull-out type; in this embodiment, the flue gas enters the dust collection box 1 through the smoke extraction pipe 101. Inside the treatment chamber 2, the flue gas, after being treated, enters the filter chamber 6, passing sequentially through an electrostatic filter 601, a HEPA filter 602, an activated carbon filter 603, and a centrifugal fan 604. The electrostatic filter 601 removes charged particles, the HEPA filter captures fine particles, the activated carbon filter 603 adsorbs harmful gases and odors, and the centrifugal fan 604 provides negative pressure suction to propel the flue gas through the entire system. All filters are installed using a pull-out design for easy disassembly and replacement. This setup ensures thorough purification of the flue gas through a multi-stage filtration system. The pull-out design simplifies maintenance and replacement procedures, reduces operating costs, and improves the practicality of the device and user experience.

[0033] Furthermore, the interior of the processing box 2 is equipped with a dust removal structure 3, which includes centrifugal blades 302 that can separate particulate matter from the smoke. The dust removal structure 3 also includes a fixed frame 301, with the centrifugal blades 302 rotatably connected to the interior of the fixed frame 301. The fixed frame 301 is fixedly connected to the inner wall of the processing box 2, and multiple drainage channels 310 are provided on the fixed frame 301. In this embodiment, the fixed frame 301 of the dust removal structure 3 is fixed to the inner wall of the processing box 2, and the centrifugal blades 302 rotate inside the fixed frame 301. When the centrifugal blades 302 rotate, the particulate matter is thrown towards the edge of the processing box 2 under the action of centrifugal force and discharged through the multiple drainage channels 310 on the fixed frame, falling into the dust collection box 1. The fixed frame 301 provides a support structure for the centrifugal blades 302, and the drainage channels 310 allow the separated particulate matter to be discharged in a timely manner, preventing the particulate matter from accumulating in the fixed frame, avoiding blockage and efficiency reduction, and enhancing the continuous working capacity of the dust removal structure 3. The above steps play a preliminary dust removal role.

[0034] like Figure 4 and 5 As shown, a fixed ring plate 303 is fixedly connected to the lower side of the fixed frame 301. A flexible water pipe 304 is installed on the fixed ring plate 303. Multiple rotating rods 305 are fixedly connected to the lower side of the centrifugal blades 302. A squeezing ring 306 is installed at one end of the rotating rod 305. The squeezing ring 306 fits against the flexible water pipe 304. Multiple spray heads 308 and a ring-shaped fixed water pipe 309 are installed on the inner wall of the treatment tank 2. The flexible water pipe 304 is connected to the spray head 308 and the fixed water pipe 309. Multiple water leakage holes 311 are opened on the bottom side of the fixed water pipe 309. In this embodiment, the squeezing ring 306 periodically squeezes the flexible water pipe 304 (the flexible water pipe 304 is connected to an external water source), so that the water in the water pipe is forced into the spray head 308 and the fixed water pipe 309. The spray head 308 sprays water mist to adsorb fine particulate matter in the flue gas, so that the fine particulate matter is removed under the action of gravity. The dust falls into the dust collection box 1, which also cools the flue gas entering the treatment box 2, preventing the flue gas temperature from becoming too high and thus affecting the subsequent purification components. The water leakage hole 311 on the bottom side of the fixed water pipe 309 drips water to wash the inner wall of the treatment box 2, so that the dust particles on the inner wall of the treatment box 2 can be washed away, thus cleaning the inner wall of the treatment box 2. The above-mentioned automatic water spraying and washing is achieved by mechanical transmission. The water mist enhances the adsorption and sedimentation of particles and reduces the temperature of flue gas. The water leakage washes away particles to prevent them from adhering to the inner wall, improves dust removal efficiency, and reduces the need for manual cleaning. Moreover, the centrifugal blades 302 and the spray head 308 are used in conjunction. When the centrifugal blades 302 rotate slowly, the water flow into the spray head 308 is small, resulting in less water being sprayed, and vice versa, thus reducing water waste.

[0035] Furthermore, the centrifugal blades 302, rotating rods 305, extrusion rings 306, and fixed toothed rings 401 constitute a unified power and execution system; the increase in the load on the centrifugal fan 604 (manifested as an increase in flow rate and concentration) will directly lead to an increase in the rotational speed of the centrifugal blades 302. The system will automatically, synchronously, and proportionally enhance the centrifugal separation force, increase the water spray volume, and increase the scraping speed.

[0036] like Figure 6 and 7 As shown, a cleaning structure 4 is also provided above the centrifugal blade 302. The cleaning structure 4 includes a scraper 403, which can scrape the inner wall of the treatment tank 2. The cleaning structure 4 also includes a fixed gear ring 401, which is fixedly connected to the outside of the centrifugal blade 302. A double-ended gear 402 is rotatably connected to the fixed frame 301. One end of the double-ended gear 402 meshes with the fixed gear ring 401, and the other end of the double-ended gear 402 meshes with a driven gear ring 404. The scraper 403 is fixedly connected to the driven gear ring 404, which is movably connected to the treatment tank 2. The brush plate 403 is in contact with the inner wall of the treatment box 2. In this embodiment, when the centrifugal blade 302 rotates, the fixed toothed ring 401 on its outer side drives the double-headed gear 402 to rotate. The other end of the double-headed gear 402 meshes with the driven toothed ring 404, thereby causing the driven toothed ring 404 and the scraper plate 403 on it to rotate. The scraper plate 403 is in contact with the inner wall of the treatment box 2 and scrapes off the residual particles on the inner wall when it rotates. The rotational power of the centrifugal blade 302 drives the scraper plate 403, realizing the function of automatically cleaning the inner wall, avoiding the accumulation of particles, maintaining the unobstructed flow and purification effect of the treatment box, and reducing the maintenance frequency.

[0037] Furthermore, the flexible water pipe 304 is preferably made of silicone or rubber material with good elasticity and fatigue resistance to ensure that it can quickly return to its original shape after being squeezed repeatedly by the compression ring 306 for a long time, thus ensuring the stability of water supply. The scraping edge of the scraper 403 is preferably covered with wear-resistant rubber or polyurethane scraper strips to ensure that the inner wall of the treatment tank 2 is not damaged while effectively removing dirt.

[0038] like Figure 6 and 8As shown, an auxiliary structure 5 is installed on one side of the scraper blade 403. The auxiliary structure 5 includes a fixing tube 501, which is fixedly connected to the scraper blade 403. A spring rod 503 is installed inside the fixing tube 501, and a reciprocating scraper rod 504 is fixedly connected to the top of the spring rod 503. A magnetic sealing plate 505 is provided between the water leakage holes 311. The magnetic sealing plate 505 is fixedly connected to the inner wall of the fixed water pipe 309 through a fixing spring 506. A magnetic block with opposite magnetic properties is installed inside the reciprocating scraper rod 504. The end is attached to the side wall of the scraper plate 403. In this embodiment, when the scraper plate 403 rotates to below the magnetic sealing plate 505, the magnetic block inside the reciprocating scraper rod 504 repels the magnetic repulsion of the magnetic sealing plate 505, which causes the reciprocating scraper rod 504 to move down and the magnetic sealing plate 505 to move up. When the magnetic sealing plate 505 moves up, the amount of water discharged from the fixed water pipe 309 increases, which can have a flushing effect on the scraper plate 403. When the reciprocating scraper rod 504 moves down, it will have a scraping effect on the scraper plate 403, removing the dust on the scraper plate 403.

[0039] Specifically, the magnetic repulsion between the magnetic block inside the reciprocating scraper rod 504 and the magnetic sealing plate 505 should be greater than the preload of the fixed spring 506 but less than its ultimate pressure, so as to ensure that the auxiliary structure 5 can be reliably triggered and reset.

[0040] Furthermore, when it is necessary to replace or clean the filter components, the electrostatic filter 601, HEPA filter 602 and activated carbon filter 603 can be removed from the filter box 6 by pulling them out independently. After maintenance, they can be reinserted to restore operation.

[0041] A method for treating flue gas from an EDM machine for purification includes:

[0042] S1: The flue gas passes through the high-speed rotating centrifugal blades 302, and the particulate matter is separated from the flue gas and thrown out by centrifugal force;

[0043] S2: Using the rotational power of the centrifugal blades 302, the compression ring 306 periodically squeezes the flexible water pipe 304, spraying water mist into the flue gas flow and rinsing the inner wall of the treatment tank 2.

[0044] S3: Using the rotational power of the centrifugal blades 302, drive the scraper 403 to scrape off the pollutants remaining on the inner wall of the treatment box 2;

[0045] S4: The flue gas treated as described above is passed through electrostatic filtration, HEPA filtration and activated carbon filtration in sequence for deep purification before being discharged.

[0046] Furthermore, the squeezing force of the squeezing ring 306 on the flexible water pipe 304 is positively correlated with the rotation speed of the centrifugal blade 302: when the flue gas concentration is high, the rotation speed of the centrifugal blade 302 increases, the squeezing frequency and force of the squeezing ring 306 increase, and the water spray volume of the spray head 308 and the water output of the fixed water pipe 309 increase simultaneously, enhancing the purification and cleaning effect; when the flue gas concentration is low, the rotation speed of the centrifugal blade 302 decreases, the squeezing force decreases, and the water output decreases, realizing dynamic adaptation of water resources. After the scraper plate 403 leaves, the magnetic sealing plate 505 is reset under the action of the fixed spring 506, and the leakage hole 311 resumes normal water output.

[0047] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for treating flue gas from an EDM machine for purification, characterized in that, The system includes a dust collection box (1), a smoke extraction pipe (101) installed on the side of the dust collection box (1), a processing box (2) installed on the upper side of the dust collection box (1), a sealing cover (7) provided on the upper side of the processing box (2), and a filter box (6) fixed and installed through one side of the sealing cover (7); a dust removal structure (3) is provided inside the processing box (2), the dust removal structure (3) includes centrifugal blades (302), the centrifugal blades (302) can separate particulate matter in smoke, and a cleaning structure (4) is also provided above the centrifugal blades (302), the cleaning structure (4) includes a scraper (403), the scraper (403) can scrape the inner wall of the processing box (2).

2. The purification device for EDM flue gas treatment according to claim 1, characterized in that, The dust removal structure (3) also includes a fixed frame (301), the centrifugal blades (302) are rotatably connected inside the fixed frame (301), the fixed frame (301) is fixedly connected to the inner wall of the processing box (2), and multiple sewage discharge troughs (310) are provided on the fixed frame (301).

3. The purification device for treating flue gas from an EDM machine according to claim 2, characterized in that, A fixed ring plate (303) is fixedly connected to the lower side of the fixed frame (301). A flexible water pipe (304) is installed on the fixed ring plate (303). A plurality of rotating rods (305) are fixedly connected to the lower side of the centrifugal blade (302). A squeezing ring (306) is installed at one end of the rotating rod (305). The squeezing ring (306) is in contact with the flexible water pipe (304). A plurality of spray heads (308) and a ring-shaped fixed water pipe (309) are installed on the inner wall of the treatment box (2). The flexible water pipe (304) is connected to the spray head (308) and the fixed water pipe (309). A plurality of water leakage holes (311) are opened on the bottom side of the fixed water pipe (309).

4. The purification device for EDM flue gas treatment according to claim 3, characterized in that, The cleaning structure (4) also includes a fixed gear ring (401), which is fixedly connected to the outside of the centrifugal blade (302). A double-headed gear (402) is rotatably connected to the fixed frame (301). One end of the double-headed gear (402) meshes with the fixed gear ring (401), and the other end of the double-headed gear (402) meshes with a driven gear ring (404). The driven gear ring (404) is fixedly connected to the scraper plate (403), and the driven gear ring (404) is movably connected to the treatment box (2). The scraper plate (403) is in contact with the inner wall of the treatment box (2).

5. The purification device for treating flue gas from an EDM machine according to claim 4, characterized in that, An auxiliary structure (5) is installed on one side of the scraper (403). The auxiliary structure (5) includes a fixed tube (501), which is fixedly connected to the scraper (403). A spring rod (503) is installed inside the fixed tube (501). A reciprocating scraper rod (504) is fixedly connected to the top of the spring rod (503). A magnetic sealing plate (505) is provided between the water leakage holes (311). The magnetic sealing plate (505) is fixedly connected to the inner wall of the fixed water pipe (309) through a fixed spring (506). A magnetic block with opposite magnetic properties is installed inside the reciprocating scraper rod (504). Both ends of the reciprocating scraper rod (504) are attached to the side wall of the scraper (403).

6. The purification device for EDM flue gas treatment according to claim 5, characterized in that, An electrostatic filter (601) is installed inside the filter box (6). A HEPA filter (602), an activated carbon filter (603), and a centrifugal fan (604) are respectively installed below the electrostatic filter (601). The electrostatic filter (601), HEPA filter (602), activated carbon filter (603), and centrifugal fan (604) are connected to the filter box (6) by a pull-out method.

7. A method for treating flue gas from a purified EDM machine, applied to the flue gas treatment device for a purified EDM machine according to any one of claims 1-6, characterized in that, include: S1: The flue gas passes through the centrifugal blades (302) at high speed, and the particulate matter is separated from the flue gas and thrown out by centrifugal force; S2: Using the rotational power of the centrifugal blades (302), the extrusion ring (306) periodically extrudes the flexible water pipe (304), spraying water mist into the flue gas and rinsing the inner wall of the treatment tank (2); S3: Using the rotational power of the centrifugal blades (302), drive the scraper (403) to scrape off the pollutants remaining on the inner wall of the treatment box (2); S4: The flue gas treated as described above is passed through electrostatic filtration, HEPA filtration and activated carbon filtration in sequence for deep purification before being discharged.

8. The method for treating flue gas from a purification EDM machine according to claim 7, characterized in that, The squeezing force of the squeezing ring (306) on the flexible water pipe (304) is positively correlated with the rotation speed of the centrifugal blade (302): when the flue gas concentration is high, the rotation speed of the centrifugal blade (302) increases, the squeezing frequency and force of the squeezing ring (306) increase, and the water spray volume of the spray head (308) and the water output volume of the fixed water pipe (309) increase simultaneously, thereby enhancing the purification and cleaning effect; when the flue gas concentration is low, the rotation speed of the centrifugal blade (302) decreases, the squeezing force decreases, and the water output volume decreases, thereby achieving dynamic adaptation of water resources.

9. A method for treating flue gas from an EDM machine for purification according to claim 8, characterized in that, After the scraper (403) leaves, the magnetic sealing plate (505) is reset under the action of the fixing spring (506), and the water leakage hole (311) resumes normal water output.

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