A device for removing tail gas of waste tire vulcanizate

Abstract

The application discloses a device for removing sulfurized substances from tail gas of waste tires, which comprises a washing tower and a desulfurization tower arranged at the upper end of the washing tower, and a shunt disc arranged between the washing tower and the desulfurization tower. The desulfurization tower comprises an outer tower body, an inner tower body and an isolation bin arranged between the outer tower body and the inner tower body, an upflow channel is formed between the outer tower body and the isolation bin, a reflux cavity is formed between the isolation bin and the inner tower body, electrode plates are arranged at the upper and lower ends of the reflux cavity, and a spraying device and a tower tray are arranged in the inner tower body. After being prewashed by the washing tower, the tail gas enters the desulfurization tower, rises along the upflow channel, reverses at the top and then descends along the reflux cavity, passes through the electric field twice for condensation treatment, and is discharged after being sprayed and absorbed in the inner tower body. The aerosol double-pass electric condensation is realized through the U-shaped reversing gas path, the electric field is isolated from the spraying area, and the desulfurization efficiency is high and the operation is stable.

Description

Technical Field

[0001] This invention relates to the field of industrial exhaust gas purification and treatment technology, specifically to a device for removing sulfides from waste tires. Background Technology

[0002] During the pyrolysis recycling or incineration process of waste tires, a large amount of exhaust gas containing sulfides (mainly hydrogen sulfide, sulfur dioxide, and organic sulfides) is generated. If emitted directly without effective treatment, it will cause serious pollution to the atmospheric environment and endanger human health. Therefore, developing efficient and stable sulfide exhaust gas removal devices has become an important issue in the field of waste tire resource utilization.

[0003] Currently, wet desulfurization is one of the more commonly used technologies for treating exhaust gases from waste tires. It achieves purification by capturing sulfides in the exhaust gas through gas-liquid contact with an absorbent liquid. Existing patents have disclosed relevant technologies in this area.

[0004] For example, Chinese patent publication CN108525413A discloses a waste tire treatment exhaust gas purification system, which includes a dust collector, a purifier, and a desulfurization tower. The exhaust gas is discharged after sequentially passing through dust removal, photocatalytic purification, and spray desulfurization. Although this scheme achieves exhaust gas purification to a certain extent, its desulfurization tower has a relatively complex internal structure, and the spray pipes are simply connected in series with the packing layer, Ball ring layer, and other multi-stage components, resulting in limited gas-liquid contact efficiency and difficulty in effectively capturing submicron-sized sulfide aerosols.

[0005] For example, Chinese patent publication CN207187395U discloses a waste tire recycling exhaust gas treatment system. Its tower contains air-floating balls, mesh plates, a ceramic packing layer, spray pipes, and an inner and outer cylinder combination structure. It removes sulfides from flue gas through a combination of desulfurization modes. However, in this system, the spray liquid and exhaust gas mix and contact within the same space inside the tower. Salts and suspended solids in the spray liquid easily adhere to the inner wall of the tower and the surfaces of various internal components during long-term operation, leading to equipment contamination and maintenance difficulties, and affecting the stability of the overall desulfurization efficiency.

[0006] In summary, existing waste tire sulfide exhaust gas removal devices have the following main shortcomings: First, the traditional spray absorption method has limited ability to capture submicron-sized sulfide aerosols, making it difficult to achieve deep desulfurization; second, the spray area inside the desulfurization tower is not effectively isolated from other functional areas, and the salts and suspended solids in the spray liquid can easily cause contamination to the internal components, affecting the long-term stable operation of the equipment. Summary of the Invention

[0007] (a) Technical problems to be solved This invention aims to overcome the shortcomings of existing technologies and provide a device for removing sulfides from waste tire exhaust gases. This device combines a scrubbing tower and a desulfurization tower, integrating multi-stage synergistic effects of sieve plate washing, electric field condensation, and countercurrent spray absorption to achieve highly efficient removal of sulfides from waste tire exhaust gases. Simultaneously, by placing electrode plates at the upper and lower ends of the reflux chamber, this invention isolates the electric field region from the spray region, effectively preventing contamination of the electrode plates by spray droplets and ensuring the long-term stability of the electric field operation.

[0008] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A waste tire sulfide removal tail gas device includes a scrubbing tower and a desulfurization tower disposed at the upper end of the scrubbing tower. A diversion plate is provided between the scrubbing tower and the desulfurization tower, and the exhaust port of the scrubbing tower is connected to the air inlet of the desulfurization tower through the diversion plate. The desulfurization tower includes an outer tower body and an inner tower body coaxially disposed inside the outer tower body. An annular reflux cavity is formed between the outer tower body and the inner tower body. Electrode plates are respectively disposed at the upper and lower ends of the reflux cavity. The electrode plates at the upper and lower ends are respectively connected to the positive and negative terminals of a high-voltage power supply to form an electric field in the reflux cavity so that sulfur-containing aerosols are charged and condensed. The inner tower body is equipped with a spraying device, and a tray is provided below the spraying device. The tray is used to carry the spraying liquid and conduct countercurrent contact mass transfer with the rising exhaust gas.

[0009] Furthermore, the electrode plate has an overall annular structure, with multiple circular vent holes evenly distributed along its annular surface for allowing exhaust gas to flow axially and pass through the electric field region.

[0010] Furthermore, the tray has a disc-shaped structure with a bottom that is a conical surface that gradually slopes upward from the center to the edge, and the surface of the tray has multiple perforated ventilation holes.

[0011] Furthermore, the bottom of the desulfurization tower is provided with a liquid storage tank in the shape of an inverted frustum, which is used to collect the spray liquid and the sulfur-containing liquid after condensation.

[0012] Furthermore, a demister is installed at the top of the desulfurization tower to remove liquid droplets entrained in the exhaust gas.

[0013] Furthermore, the washing tower includes a washing tower body and a water collection tank disposed at the bottom of the washing tower body. Multiple layers of sieve plates are arranged sequentially along the height direction of the washing tower body, and a washing device is fixedly disposed below each layer of sieve plates.

[0014] Furthermore, the washing tower and the desulfurization tower are respectively connected to a pumping mechanism, which is used to supply washing liquid or spraying liquid to the washing device and the spraying device.

[0015] (III) Beneficial Effects The purpose of this invention is to provide a device for removing sulfides from waste tires, which has the following beneficial effects: 1. This invention establishes an isolation chamber between the outer and inner tower bodies, using the annular space between the outer tower body and the isolation chamber as the upward flow channel and the annular space between the isolation chamber and the inner tower body as the return flow cavity. Annular electrode plates penetrating the entire cross-section are installed at both ends, allowing the exhaust gas to longitudinally traverse the same electric field region twice during its upward and downward strokes. Sulfur-containing aerosol particles are charged and undergo initial agglomeration during their first upward passage through the electric field. After turning back at the top, they pass through the electric field a second time in the opposite direction. The relationship between the direction of motion of the charged particles and the direction of the electric field force changes, further promoting the collision probability and agglomeration efficiency between particles. Compared to traditional devices that pass through the electric field only once, this invention achieves two-way charged agglomeration treatment of aerosols through a U-shaped reversing gas path, extending the total residence time by more than double, and significantly improving the agglomeration effect, especially for submicron-sized particles.

[0016] 2. In this invention, the electrode plates are positioned in the upward flow channel between the outer tower body and the isolation chamber, and in the reflux cavity between the isolation chamber and the inner tower body, while the spray device and the tray are located inside the inner tower body, completely isolating them in space. No spray droplets enter the electric field area, and the electrode plate surface remains dry at all times. This fundamentally avoids the contamination and electrical breakdown problems caused by the reverse adsorption of charged spray droplets onto the electrode plate surface in traditional devices. It allows the electric field to operate stably at a high voltage for extended periods without the need for frequent shutdowns for cleaning and maintenance.

[0017] 3. This invention achieves step-by-step removal of sulfides from waste tire exhaust gas through a three-stage synergistic effect: pre-dust removal via scrubbing with screen plates in a scrubbing tower, double-pass electric field condensation in the reflux chamber, and counter-current absorption via spraying within the inner tower. The scrubbing tower first removes dust and some water-soluble sulfides, providing a clean gas source for the subsequent electric field and spraying; electric field condensation transforms submicron-sized aerosols, which are difficult to capture in the liquid phase, into larger droplets; and spraying absorption performs the final deep absorption of the large-diameter sulfur-containing droplets and residual gaseous sulfides after condensation. The three-stage treatment functions are complementary rather than simply superimposed, resulting in an overall desulfurization efficiency significantly higher than the sum of the individual unit operations.

[0018] 4. This invention integrates the scrubbing tower and the desulfurization tower. The desulfurization tower adopts a coaxial nested structure of an outer tower body, an isolation chamber, and an inner tower body, integrating the upward flow channel, the electric field region of the reflux chamber, the spray absorption region, and the liquid storage region into the same tower body. Simultaneously, the U-shaped reversing gas path allows the exhaust gas to complete two-way treatment within the electric field region, eliminating the need to increase the electric field length or set up multiple electric fields. Throughout the gas path, the gas maintains a consistent upward discharge trend. The reversing section only utilizes the sealed top cover of the isolation chamber to naturally guide the airflow, eliminating the need for additional induced draft devices, thus reducing system energy consumption and equipment footprint. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the entire waste tire sulfide removal tail gas device of the present invention; Figure 2 This is a half-sectional schematic diagram of the entire waste tire sulfide removal tail gas device of the present invention; Figure 3 This is an enlarged view of point A in the waste tire sulfide removal tail gas device of the present invention.

[0020] In the diagram: 1—Scrubber; 11—Scrubber body; 12—Water collection tank; 13—Screen plate; 14—Scrubber device; 2—Desulfurization tower; 21—Outer tower body; 22—Inner tower body; 23—Isolation chamber; 24—Reflux chamber; 25—Electrode plate; 26—Spray device; 27—Tower tray; 271—Perforated vent; 28—Liquid storage tank; 29—Demister; 3—Diverter plate; 4—Pumping mechanism. Detailed Implementation

[0021] The following will refer to the appendix in the examples of this invention. Figure 1-3 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, the present invention provides a waste tire sulfide removal tail gas device, including a scrubbing tower 1 and a desulfurization tower 2 disposed at the upper end of the scrubbing tower 1.

[0023] The washing tower 1 includes a washing tower body 11 and a water collection tank 12 disposed at the bottom of the washing tower body 11. Multiple layers of sieve plates 13 are arranged sequentially along the height direction of the washing tower body 11, with each layer of sieve plate 13 spaced apart along the axial direction of the washing tower body 11. A washing device 14 is disposed below the sieve plates 13, and the washing device 14 is used to spray washing liquid downward.

[0024] The surface of the sieve plate 13 is uniformly perforated to allow the exhaust gas to pass upwards. When the exhaust gas enters from the bottom of the scrubbing tower 1 and flows upwards, it first passes through the perforations of the lower sieve plate 13 and is dispersed into multiple fine airflows. At the same time, the scrubbing device 14 sprays scrubbing liquid downwards, causing the scrubbing liquid to form a liquid layer of a certain thickness on the upper surface of the sieve plate 13. When the rising exhaust gas passes through the perforations of the sieve plate 13, it is forced to pass through this liquid layer in the form of bubbles, achieving the first violent gas-liquid turbulent contact. The dust particles in the exhaust gas are wetted and captured by the scrubbing liquid, while some water-soluble sulfides (such as sulfur dioxide and hydrogen sulfide) are absorbed by the scrubbing liquid.

[0025] The exhaust gas continues to rise into the next sieve plate 13, repeating the dispersion-layer-contact process described above. The progressive arrangement of the multi-layer sieve plates 13 allows the exhaust gas to undergo multiple gas-liquid redistribution and re-contact processes within the scrubbing tower 1, continuously enhancing the relative motion between the scrubbing liquid and the exhaust gas, thus gradually improving dust removal efficiency and sulfide pre-absorption efficiency. Waste liquid generated during the scrubbing process flows downwards into the collection tank 12, which has a drain port at the bottom for periodic discharge or recycling. The exhaust gas treated by the scrubbing tower 1 is discharged from the top of the scrubbing tower 1 and enters the distribution plate 3.

[0026] The diversion plate 3 is positioned between the scrubbing tower 1 and the desulfurization tower 2, with the exhaust port of the scrubbing tower 1 connected to the lower space of the diversion plate 3. The central area of ​​the diversion plate 3 is a closed structure, while its outer periphery has multiple evenly distributed openings or channels for gas passage. The function of the diversion plate 3 is as follows: after the exhaust gas from the scrubbing tower 1 enters the space below the diversion plate 3, due to the closed center of the diversion plate 3, the gas cannot pass directly upwards from the center and is forced to flow radially outwards, subsequently entering the bottom area of ​​the desulfurization tower 2 through the openings at the outer periphery of the diversion plate 3. This closed-center, open-outer-periphery design of the diversion plate 3 forces the exhaust gas to be evenly distributed along the entire annular cross-section at the bottom of the desulfurization tower 2, preventing concentrated airflow impact on a localized area and ensuring the uniformity of airflow within the subsequent electric field region. Simultaneously, the diversion plate 3 also serves to block the rising liquid from the scrubbing tower 1, preventing the scrubbing liquid from being carried into the desulfurization tower 2.

[0027] The desulfurization tower 2 includes an outer tower body 21 and an inner tower body 22 coaxially arranged inside the outer tower body 21, as well as an isolation chamber 23 disposed between the outer tower body 21 and the inner tower body 22. The isolation chamber 23 is a vertically arranged cylindrical component, coaxially arranged with both the outer tower body 21 and the inner tower body 22. The lower end of the isolation chamber 23 extends to the lower region of the desulfurization tower 2, and the upper end of the isolation chamber 23 extends to the top region of the desulfurization tower 2 and is connected to a sealed top cover. The cylindrical wall of the isolation chamber 23 is a continuous closed structure, without openings for gas to pass through, except for channels or openings communicating with the outside at its upper and lower ends.

[0028] With the above arrangement, an annular upward flow channel is formed between the outer tower body 21 and the isolation chamber 23, and an annular reflux chamber 24 is formed between the isolation chamber 23 and the inner tower body 22. The upward flow channel and the reflux chamber 24 are interconnected in the top region of the desulfurization tower 2, and are isolated from each other in the bottom region of the desulfurization tower 2 by the lower end structure of the isolation chamber 23, thus forming a complete U-shaped return gas path channel.

[0029] A liquid storage tank 28 is provided at the bottom of the desulfurization tower 2. The liquid storage tank 28 has an inverted frustum-shaped structure, with its large end facing down and its small end facing up. The small end (i.e., the upper end) of the liquid storage tank 28 is fixedly connected to the lower end of the isolation tank 23 to form a sealed fit. The conical wall of the liquid storage tank 28 forms an annular inlet channel for gas entry between its outer side and the distribution plate 3. This annular inlet channel connects to the bottom of the upward flow channel between the outer tower body 21 and the isolation tank 23.

[0030] Electrode plates 25 are respectively provided at the upper and lower ends of the reflux chamber 24. Specifically, the electrode plate 25 includes a bottom electrode plate and a top electrode plate. The bottom electrode plate is located in the lower region of the desulfurization tower 2, above the liquid storage tank 28 and close to the lower end of the isolation tank 23; the top electrode plate is located in the upper region of the desulfurization tower 2, below the sealing top cover at the upper end of the isolation tank 23.

[0031] Both the bottom and top electrode plates are annular plate structures, extending radially from the inner wall of the outer tower 21 to the outer wall of the inner tower 22, thus simultaneously spanning the upward flow channel between the outer tower 21 and the isolation chamber 23, and the reflux cavity 24 between the isolation chamber 23 and the inner tower 22. The electrode plates 25 have multiple openings evenly distributed along their annular surfaces to allow airflow to pass axially. The bottom and top electrode plates are connected to the positive and negative terminals of the high-voltage power supply, respectively, forming a longitudinally distributed electric field region within the desulfurization tower 2. This electric field region simultaneously covers the entire annular cross-section of the upward flow channel and the reflux cavity 24.

[0032] After being evenly distributed by the distribution plate 3, the exhaust gas first enters the annular inlet channel at the bottom of the desulfurization tower 2 from the edge of the distribution plate 3, and flows upward along the upward flow channel between the outer tower body 21 and the isolation chamber 23. During this upward flow, the exhaust gas passes through the opening in the outer ring area of ​​the bottom electrode plate (i.e., the part located between the outer tower body 21 and the isolation chamber 23) and enters the electric field region between the electrode plates 25.

[0033] The exhaust gas continues to rise in the upward flow channel until it reaches the top of the desulfurization tower 2. Because the top of the isolation chamber 23 is equipped with a sealed top cover, the exhaust gas cannot continue to flow upward or be discharged. It is forced to turn in the top area and return from the upward flow channel between the outer tower body 21 and the isolation chamber 23 into the return cavity 24 between the isolation chamber 23 and the inner tower body 22, and flows from top to bottom along the return cavity 24.

[0034] As the exhaust gas flows downward within the reflux chamber 24, it passes through the opening in the inner ring region of the top electrode plate (i.e., the part between the isolation chamber 23 and the inner tower body 22) and enters the electric field region. It then continues to flow downward until it reaches the bottom of the desulfurization tower 2, where it passes through the opening in the inner ring region of the bottom electrode plate (i.e., the part between the isolation chamber 23 and the inner tower body 22) once again.

[0035] In the aforementioned U-shaped reversing gas path, the exhaust gas passes longitudinally twice through the electric field region formed by the bottom and top electrode plates: first, it passes through the electric field from bottom to top in the upward flow channel, and second, it passes through the electric field from top to bottom in the return cavity 24. Sulfur-containing aerosol particles undergo two charging and agglomeration processes in the electric field. During the first upward passage through the electric field, the aerosol particles become charged, and some particles undergo initial agglomeration. After the top reversal, the particles enter the return cavity 24 with the exhaust gas in the opposite direction and pass through the electric field a second time. The relationship between the electric field direction and the direction of motion changes, and the charged particles are again subjected to electric field forces in the reverse electric field, further colliding and agglomerating with subsequent uncharged or differently charged particles. These two electric field treatments significantly prolong the total residence time of the aerosols within the electric field region, allowing submicron-sized particles to fully agglomerate into larger droplet clusters, which then slide down the inner wall of the return cavity 24 under gravity into the storage tank 28.

[0036] The lower end of the inner tower body 22 is provided with a conical guide surface. The larger end of the conical guide surface is fixedly connected to the cylinder wall of the inner tower body 22 with its larger end facing upwards, and its smaller end faces downwards. A bottom opening for gas to enter the interior of the inner tower body 22 is provided at the center of the smaller end. The outer wall surface of the conical guide surface and the inner wall surface of the isolation chamber 23 form a bottom contraction channel of the reflux chamber 24. The exhaust gas flowing downwards from the reflux chamber 24 is guided by the conical guide surface and enters the interior space of the inner tower body 22 from the bottom opening.

[0037] After undergoing two electric field condensation treatments, the exhaust gas enters the inner tower body 22 through the bottom opening and then flows upwards. The inner tower body 22 is equipped with a spray device 26 and a tray 27. The spray device 26 is fixedly installed in the upper region of the inner tower body 22, and the tray 27 is located below the spray device 26. Multiple spray nozzles are evenly arranged on the spray device 26, with each nozzle spraying downwards towards the tray 27.

[0038] The tray 27 has a disc-shaped structure, and its outer edge is fixedly connected to the inner wall of the inner tower body 22. The bottom of the tray 27 has a conical structure that gradually slopes upward from the center to the edge. This conical surface allows the sprayed liquid to spread and flow evenly from the center to the edge after falling onto the surface of the tray 27. The surface of the tray 27 has multiple perforated vent holes 261 evenly distributed to allow the rising exhaust gas to pass through and make gas-liquid contact with the liquid layer covering the tray 27.

[0039] The spray device 26 continuously sprays spray liquid downwards, which spreads evenly on the conical surface of the tray 27 to form a continuous liquid layer. The exhaust gas entering from the bottom of the inner tower 22 flows upwards to the bottom of the tray 27. As it passes through the perforated vents 261, it is dispersed into numerous tiny bubbles. These bubbles come into full contact with the spray liquid as they pass through the liquid layer, and the sulfides are absorbed by the spray liquid. The conical structure of the tray 27 ensures complete liquid coverage without dead zones, preventing gas short-circuiting.

[0040] The gas-liquid contact area formed between the spray device 26 and the tray 27 is located in the latter part of the entire gas path process. At this time, the tail gas has already undergone pre-washing by the scrubbing tower 1 and electric field condensation treatment by the reflux chamber 24. The dust particles and most of the sulfides in the tail gas have been removed in advance. The tail gas entering the spray area has a relatively simple composition, and the spray liquid is not easily contaminated by solid particles, which is conducive to maintaining the absorption activity of the spray liquid and extending the replacement cycle of the spray liquid.

[0041] After being absorbed by the spray, the exhaust gas continues to flow upward and enters the demister 29 located at the top of the desulfurization tower 2. The demister 29 is located at the top of the inner tower body 22 and below the sealed top cover of the isolation chamber 23. As the exhaust gas passes through the demister 29, the fine droplets entrained in it are captured and removed, and the clean exhaust gas is discharged from the exhaust port at the top of the desulfurization tower 2.

[0042] The spray liquid from the spray device 26 continues to flow downwards after passing through the tray 27, exiting through the bottom opening of the conical guide surface at the lower end of the inner tower body 22 and entering the storage tank 28. Simultaneously, the sulfur-containing liquid that settles after being condensed by the electric field in the reflux chamber 24 flows downwards along the inner and outer walls of the reflux chamber 24, also converging into the storage tank 28. The inverted frustum-shaped structure of the storage tank 28 allows the collected liquid to naturally converge towards the bottom center, facilitating centralized discharge or pumping to the recycling system via the pumping mechanism 4.

[0043] The scrubbing tower 1 and the desulfurization tower 2 are each externally connected to a pumping mechanism 4. The pumping mechanism 4 includes an independent scrubbing liquid delivery pump and a spray liquid delivery pump, which are used to continuously supply scrubbing liquid and spray liquid to the scrubbing device 14 and the spray device 26, respectively, to maintain the dynamic liquid phase balance of the entire device.

[0044] Working principle: The sulfur-containing exhaust gas generated from the pyrolysis or combustion of waste tires first enters the scrubbing tower 11 from the bottom and passes through each layer of screen plates 13 from bottom to top. At each screen plate 13, the rising exhaust gas comes into gas-liquid contact with the scrubbing liquid sprayed by the scrubbing device 14. Dust particles in the exhaust gas are wetted and captured by the scrubbing liquid, and some water-soluble sulfides are absorbed by the scrubbing liquid. The scrubbed exhaust gas is then discharged from the top of the scrubbing tower 1 into the distribution plate 3.

[0045] After the exhaust gas enters the distribution plate 3, due to the closed center of the distribution plate 3, the airflow is forced to split to the periphery. It then enters the annular inlet channel at the bottom of the desulfurization tower 2 evenly through the openings at the edge of the distribution plate 3, and then flows upward along the upward flow channel between the outer tower body 21 and the isolation chamber 23. During the upward process, the exhaust gas passes through the opening of the bottom electrode plate located in the upward flow channel area and enters the electric field region.

[0046] After the exhaust gas rises continuously along the upward flow path to the top of the desulfurization tower 2, it cannot continue to rise due to the obstruction of the sealed top cover at the upper end of the isolation chamber 23. It is forced to turn in the top region and return from the upward flow path between the outer tower body 21 and the isolation chamber 23 into the reflux chamber 24 between the isolation chamber 23 and the inner tower body 22, flowing downward along the reflux chamber 24. During this downward flow, the exhaust gas passes sequentially through the opening of the top electrode plate in the reflux chamber 24 region and the opening of the bottom electrode plate in the reflux chamber 24 region. In the above-mentioned U-shaped return gas path, the exhaust gas passes through the electric field region formed by the bottom electrode plate and the top electrode plate twice in a longitudinal direction. The sulfur-containing aerosol particles are charged in the electric field and collide and agglomerate to form larger droplet clusters. Under the action of gravity, they slide down the wall of the reflux chamber 24 into the liquid storage tank 28.

[0047] After being condensed by the electric field, the exhaust gas continues to flow downwards along the reflux chamber 24. Guided by the conical guide surface at the lower end of the inner tower body 22, it enters the interior of the inner tower body 22 through the opening at the bottom of the inner tower body 22, and then flows upwards. After reaching the bottom of the tray 27, the exhaust gas passes through the perforated vent 261 and is dispersed into a large number of fine bubbles. When it passes through the spray liquid layer covering the tray 27, it comes into full contact with the spray liquid, and the residual sulfides in the exhaust gas are absorbed by the spray liquid.

[0048] After being absorbed by the spray, the exhaust gas continues to flow upward, passing through the demister 29. The fine droplets entrained in the exhaust gas are captured and removed, and the clean exhaust gas is finally discharged from the exhaust port at the top of the desulfurization tower 2.

[0049] Regarding the liquid phase flow, the spray liquid sprayed downwards by the spray device 26 spreads evenly on the conical surface of the tray 27 to form a liquid layer. The tail gas passing through the perforated vent 261 of the tray 27 comes into gas-liquid contact with this liquid layer. After completing the gas-liquid contact, the spray liquid continues to flow downwards, exiting through the bottom opening of the conical guide surface at the lower end of the inner tower body 22 and entering the liquid storage tank 28. Simultaneously, the sulfur-containing liquid that settles after being condensed by the electric field in the reflux chamber 24 flows downwards along the wall of the reflux chamber 24 and also flows into the liquid storage tank 28. The liquid collected in the liquid storage tank 28 is discharged through the bottom drain or recycled through the pumping mechanism 4.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for removing sulfides from waste tires, characterized in that, It includes a scrubbing tower (1) and a desulfurization tower (2) located at the top of the scrubbing tower (1), and a diversion plate (3) is provided between the scrubbing tower (1) and the desulfurization tower (2). The desulfurization tower (2) includes an outer tower body (21) and an inner tower body (22) coaxially arranged therewith. An isolation chamber (23) is provided between the outer tower body (21) and the inner tower body (22). A reflux chamber (24) is provided between the outer tower body (21), the inner tower body (22) and the isolation chamber (23). Electrode plates (25) are provided at the upper and lower ends of the reflux chamber (24). A spray device (26) is provided inside the inner tower body (22). A tray (27) is provided at the lower end of the spray device (26).

2. The waste tire sulfide removal device according to claim 1, characterized in that, The electrode plate (25) is generally ring-shaped, with multiple sets of circular openings evenly arranged along its annular surface for airflow.

3. The waste tire sulfide removal device according to claim 1, characterized in that, The tray (27) has a disc-shaped structure with a bottom that is a cone that gradually slopes upward from the center to the edge. The surface of the tray (27) has multiple perforated ventilation holes (271).

4. The waste tire sulfide removal device according to claim 1, characterized in that, The bottom of the desulfurization tower (2) is provided with a liquid storage tank (28) in the shape of an inverted frustum, which is used to collect the spray liquid and the sulfur-containing liquid after condensation.

5. The waste tire sulfide removal device according to claim 1, characterized in that, The top of the desulfurization tower (2) is equipped with a demister (29).

6. The waste tire sulfide removal device according to claim 1, characterized in that, The washing tower (1) includes a washing tower body (11) and a water collection tank (12) located at the bottom of the washing tower body (11). Multiple sets of sieve plates (13) are arranged inside the washing tower body (11) along the height direction. A washing device (14) is fixed at the lower end of the sieve plate (13).

7. The waste tire sulfide removal device according to claim 1, characterized in that, The washing tower (1) and the desulfurization tower (2) are connected to a pumping mechanism (4).

8. The waste tire sulfide removal device according to claim 1, characterized in that, The isolation chamber (23) is a cylindrical structure that is closed at both ends and has no openings in the cylindrical wall.

9. The waste tire sulfide removal device according to claim 1, characterized in that, The electrode plates (25) at the top and bottom ends are respectively connected to the positive and negative terminals of the high-voltage power supply.

Images