Exhaust gas collecting and processing device in tire vulcanization process

Abstract

The utility model relates to tire vulcanization waste gas treatment technical field, specifically disclose a kind of waste gas collecting and processing device in tire vulcanization process, including the lifting of adjusting cylinder by electric hydraulic rod drive adjustment, change the relative flow area of mesh and flow guide box, and the pressure of connecting pipe is monitored in real time by pressure sensor, can cope with the waste gas flow violent fluctuation caused by tire vulcanization intermittent production, after being converted into relatively stable airflow, send into main waste gas treatment equipment again, create stable, continuous ideal working condition for main processing equipment, significantly improve purification efficiency, and reduce the failure rate caused by frequent impact of equipment, and by with fixed rod and scraper on fixed disc, automatically scrape the pollutant attached to its inner wall in adjusting cylinder lifting process, effectively prevent mesh blockage, ensure that the function of flow regulating mechanism is long-term effective.

Description

Technical Field

[0001] This utility model relates to the field of tire vulcanization waste gas treatment technology, and specifically discloses a waste gas collection and treatment device during the tire vulcanization process. Background Technology

[0002] Tire vulcanization is a critical process in tire manufacturing. During this process, the vulcanizing machine heats and shapes the tire blank under high temperature and pressure, generating a large amount of complex industrial waste gas. This waste gas mainly contains sulfides, non-methane hydrocarbons, benzene compounds, and odorous substances. If emitted directly without treatment, it will cause serious harm to the environment and human health.

[0003] Currently, the common method in the industry is to collect the waste gas through a gas collection hood and then directly introduce it into the main waste gas treatment equipment (such as a spray tower, activated carbon adsorption box, catalytic combustion device (RCO), or regenerative thermal oxidizer (RTO) for end-of-pipe treatment. However, the intermittent operation of the sulfidation process causes drastic fluctuations in waste gas flow. Instantaneous peak airflow can impact downstream treatment equipment, leading to problems such as rapid saturation of activated carbon and disruption of the thermal balance of thermal equipment. Therefore, improvements are needed. Utility Model Content

[0004] This utility model proposes a waste gas collection and treatment device during the tire vulcanization process. The device uses an electric hydraulic rod to drive the adjusting cylinder to rise and fall, thereby changing the relative flow area between the mesh and the guide box in real time. This creates a stable and continuous ideal working condition for the main treatment equipment, significantly improving the purification efficiency and reducing the failure rate of the equipment due to frequent impacts.

[0005] This utility model is implemented as follows: a waste gas collection and treatment device in the tire vulcanization process includes a base plate, a tire vulcanizing machine set on the top of the base plate, a gas collection hood fixedly installed on the top of the tire vulcanizing machine, a waste gas pretreatment mechanism set on the outside of the tire vulcanizing machine, and a main waste gas treatment device. The exhaust gas pretreatment mechanism includes a pretreatment cylinder, which is fixed to the top of the base plate by a support leg, and a vent pipe is connected between the top of the gas collection hood and the bottom of the outer wall of the pretreatment cylinder. The pretreatment cylinder has a lantern-shaped guide box fixedly connected to the middle of its cylinder wall. The guide box is connected to the air inlet of the main exhaust gas treatment equipment through a connecting pipe. The pretreatment cylinder is fitted with a liftable regulating cylinder inside, and the regulating cylinder slides and seals with the inner wall of the pretreatment cylinder. Multiple mesh holes are opened through the middle of the outer circumference of the regulating cylinder, and a grid plate is fixedly installed through the bottom of the regulating cylinder. A blower and a pressure sensor are sequentially installed on the connecting pipe along the airflow direction; The relative overlap area between the mesh and the guide box can be changed by driving the regulating cylinder to rise and fall, thereby adjusting the flow rate of the exhaust gas entering the main exhaust gas treatment equipment; the grid plate is used to maintain the basic airflow channel when the regulating cylinder is at different heights.

[0006] As a preferred embodiment of the waste gas collection and treatment device in the tire vulcanization process of this utility model, an electric hydraulic rod is installed at the bottom of the pretreatment cylinder. The output end of the electric hydraulic rod extends upward through the bottom of the pretreatment cylinder and is sealed to the bottom of the pretreatment cylinder through a mechanical seal. The end of the output end of the electric hydraulic rod is fixedly connected to the bottom of the adjusting cylinder.

[0007] As a preferred embodiment of the waste gas collection and treatment device in the tire vulcanization process of this utility model, a fixed rod is fixedly connected to the top of the pretreatment cylinder, the fixed rod extends downward and penetrates the top of the regulating cylinder, and the two are dynamically connected by a mechanical seal; a fixed disk located inside the regulating cylinder is fixedly connected to the bottom of the fixed rod, and a scraper is fixedly installed on the outer circumference of the fixed disk, the edge of the scraper abutting against the inner side wall of the regulating cylinder.

[0008] As a preferred embodiment of the exhaust gas collection and treatment device in the tire vulcanization process of this utility model, the inner sidewall of the pretreatment cylinder is fitted with a sealing ring that is tightly connected to the adjusting cylinder through a groove.

[0009] As a preferred embodiment of the waste gas collection and treatment device in the tire vulcanization process of this utility model, the bottom surface of the pretreatment cylinder is inclined, and a slag discharge pipe is connected to its lowest point, and a discharge valve is installed on the slag discharge pipe.

[0010] In a preferred embodiment of the exhaust gas collection and treatment device during the tire vulcanization process according to this utility model, the detection end of the pressure sensor is located inside the connecting pipe.

[0011] The beneficial effects of this utility model are: The adjustment cylinder is raised and lowered by an electric hydraulic rod, which changes the relative flow area between the mesh and the guide box in real time. The pressure sensor monitors the pressure of the connecting pipe in real time. This can cope with the drastic fluctuations in exhaust gas flow caused by the intermittent production of tire vulcanization. It transforms the instantaneous and impactful peak exhaust gas flow into a relatively stable airflow before sending it into the main exhaust gas treatment equipment. This creates a stable and continuous ideal working condition for the main treatment equipment, significantly improving the purification efficiency and reducing the failure rate of the equipment due to frequent impacts.

[0012] By using a fixed rod and a scraper on a fixed plate, contaminants attached to the inner wall of the regulating cylinder are automatically scraped off during the lifting and lowering process, effectively preventing mesh blockage and ensuring the long-term effectiveness of the flow regulating mechanism. This avoids regulation failure or flow attenuation caused by scaling, significantly reduces the frequency of equipment shutdown for cleaning and the labor intensity of manual cleaning, improves equipment online rate, and saves maintenance costs. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0014] Figure 1 This is a front sectional view of a waste gas collection and treatment device for the tire vulcanization process according to the present invention. Figure 2 This is a structural diagram of the adjusting cylinder of this utility model; Figure 3 This is a structural diagram of the fixing disc and scraper of this utility model; Figure 4 This utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 5 This is a top view of the fence panel of this utility model.

[0015] The markings in the diagram are: 1. Base plate; 2. Tire vulcanizing machine; 201. Gas collection hood; 202. Ventilation pipe; 3. Pretreatment cylinder; 301. Flow guide box; 302. Slag discharge pipe; 303. Sealing ring; 4. Adjusting cylinder; 401. Mesh; 402. Fence plate; 5. Electro-hydraulic rod; 6. Fixing rod; 601. Fixing disc; 602. Scraper; 7. Connecting pipe; 701. Pressure sensor; 702. Exhaust fan; 8. Main exhaust gas treatment equipment. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0017] Please see Figure 1-5 A waste gas collection and treatment device for tire vulcanization process includes a base plate 1, a tire vulcanizing machine 2 set on the top of the base plate 1, a gas collection hood 201 fixedly installed on the top of the tire vulcanizing machine 2, a waste gas pretreatment mechanism set on the outside of the tire vulcanizing machine 2, and a main waste gas treatment device 8. The exhaust gas pretreatment mechanism includes a pretreatment cylinder 3, which is fixed to the top of the base plate 1 by a support leg. A ventilation pipe 202 is connected between the top of the gas collection hood 201 and the bottom of the outer wall of the pretreatment cylinder 3. A lantern-shaped guide box 301 is fixedly connected to the middle of the wall of the pretreatment cylinder 3. The guide box 301 is connected to the air inlet of the main exhaust gas treatment equipment 8 through the connecting pipe 7. A liftable regulating cylinder 4 is sleeved inside the pretreatment cylinder 3. The regulating cylinder 4 slides and seals with the inner wall of the pretreatment cylinder 3. Multiple mesh holes 401 are opened through the middle of the outer circumference of the regulating cylinder 4, and a grid plate 402 is fixedly installed through the bottom of the regulating cylinder 4. A blower 702 and a pressure sensor 701 are sequentially arranged on the connecting pipe 7 along the airflow direction; The relative overlap area between the mesh 401 and the guide box 301 can be changed by driving the regulating cylinder 4 to rise and fall, thereby adjusting the flow rate of the exhaust gas entering the main exhaust gas treatment equipment 8; the grid plate 402 is used to maintain the basic airflow channel when the regulating cylinder 4 is at different heights.

[0018] In this embodiment: the gas collection hood 201 captures the exhaust gas. Under the negative pressure suction generated by the induced draft fan 702, the exhaust gas is sent to the bottom of the pretreatment cylinder 3 through the vent pipe 202. When the exhaust gas enters the bottom of the pretreatment cylinder 3, it first enters the internal space of the regulating cylinder 4 through the grid plate 402 at the bottom of the regulating cylinder 4. This allows for initial flow stabilization of the newly entered exhaust gas. Inside the regulating cylinder 4, the exhaust gas then exits through the mesh 401 on its outer circumference, enters the guide box 301, and finally flows to the main exhaust gas treatment equipment 8 through the connecting pipe 7. At this time, the pressure sensor 701 monitors the pressure in the connecting pipe 7 in real time. This pressure value is directly related to the exhaust gas flow rate. When the flow rate is detected to be too high (such as during mold opening), the PLC controller instructs the electric hydraulic rod 5 to actuate, pushing the regulating cylinder 4 upward. The rise of the regulating cylinder 4 changes the relative position of the mesh 401 and the inlet of the guide box 301, reducing the effective overlap area. This is equivalent to closing the exhaust window, increasing the resistance to exhaust gas discharge from the inside, thereby limiting the exhaust gas flow rate during peak periods. When the exhaust gas volume decreases, the regulating cylinder 4 descends, increasing the effective flow area of ​​the mesh 401, ensuring that the exhaust gas can be extracted in a timely manner. After the above buffering and flow stabilization, the exhaust gas enters the main exhaust gas treatment equipment 8 at a stable and suitable flow rate, creating a stable and continuous ideal working condition for the main exhaust gas treatment equipment 8, significantly improving purification efficiency, and reducing the failure rate of the equipment due to frequent impacts.

[0019] The stationary scraper 602 scrapes away contaminants from the inner wall of the regulating cylinder 4 as it rises and falls, effectively preventing the mesh 401 from becoming clogged and ensuring the long-term effectiveness of the flow regulating mechanism.

[0020] As a technical optimization of this utility model, an electric hydraulic rod 5 is installed at the bottom of the pretreatment cylinder 3. The output end of the electric hydraulic rod 5 passes through the bottom of the pretreatment cylinder 3 and is sealed to the bottom of the pretreatment cylinder 3 through a mechanical seal. The output end of the electric hydraulic rod 5 is fixedly connected to the bottom of the adjusting cylinder 4.

[0021] In this embodiment: the electro-hydraulic rod 5 is the power and execution unit for the lifting and lowering movement of the regulating cylinder 4. When the electro-hydraulic rod 5 is started, its output end performs a linear extension and retraction movement. Since the output end passes through the bottom of the cylinder through a mechanical seal and is rigidly connected to the bottom of the regulating cylinder 4, this linear thrust is directly transmitted to the regulating cylinder 4, driving it to overcome friction and airflow pressure, and achieve lifting and lowering positioning within the pretreatment cylinder 3.

[0022] As a technical optimization of this utility model, a fixing rod 6 is fixedly connected to the top of the pretreatment cylinder 3. The fixing rod 6 extends downward and passes through the top of the regulating cylinder 4, and the two are dynamically connected by a mechanical seal. A fixing disk 601 located inside the regulating cylinder 4 is fixedly connected to the bottom of the fixing rod 6. A scraper 602 is fixedly installed on the outer circumference of the fixing disk 601, and the edge of the scraper 602 abuts against the inner side wall of the regulating cylinder 4.

[0023] In this embodiment, the fixed disc 601 and scraper 602 connected to the bottom of the fixed rod 6 are stationary in space. When the adjusting cylinder 4 is raised and lowered, its inner wall slides up and down relative to the edge of the stationary scraper 602. This relative motion forces the scraper 602 to continuously scrape the inner wall of the adjusting cylinder 4 and the mesh 401, effectively removing adhering oil stains, adhesive particles and other contaminants, and preventing the mesh 401 from becoming clogged.

[0024] As a technical optimization of this utility model, the inner sidewall of the pretreatment cylinder 3 is fitted with a sealing ring 303 that is tightly connected to the regulating cylinder 4 through a groove.

[0025] In this embodiment, the sealing ring 303, relying on its own elastic deformation, always maintains a tight line or surface contact with the smooth outer surface of the regulating cylinder 4. During the lifting and lowering process of the regulating cylinder 4, it can form an effective sealing barrier between the two relatively moving metal surfaces, ensuring that all exhaust gas must enter the interior of the regulating cylinder 4 through the designed grid plate 402 and then flow through the mesh 401. This path prevents the exhaust gas from directly entering the guide box 301 without passing through the regulating cylinder 4.

[0026] As a technical optimization of this utility model, the bottom surface inside the pretreatment cylinder 3 is inclined, and a slag discharge pipe 302 is connected to its lowest point, and a discharge valve is installed on the slag discharge pipe 302.

[0027] In this embodiment, the inclined bottom wall of the pretreatment cylinder 3 allows heavier particles in the exhaust gas that lose kinetic energy due to the reduced flow rate, as well as particles (such as carbon black and dust) removed from the regulating cylinder 4 by the scraper 602, to fall into the bottom of the pretreatment cylinder 3 through the grid plate 402. By opening the discharge valve, they can be periodically discharged from the slag discharge pipe 302.

[0028] As a technical optimization of this utility model, the detection end of the pressure sensor 701 is located inside the connecting pipe 7.

[0029] In this embodiment, the detection end of the pressure sensor 701 is directly exposed to the airflow in the connecting pipe 7, enabling real-time and continuous monitoring of the gas pressure (typically a negative pressure value) within the pipe. This pressure value has a direct correlation with the instantaneous flow rate of the exhaust gas (changes in flow rate cause pressure changes before and after the induced draft fan 702). The sensor accurately converts this physical quantity into a standard electrical signal output.

[0030] The working principle and usage process of this utility model: The device is electrically connected to an external PLC controller and operation panel (touch screen), and the operation of each component can be controlled through the device.

[0031] During the mold opening and tire removal processes of the tire vulcanizing machine 2, a surge in exhaust gas is generated. The gas collection hood 201 captures the exhaust gas, and under the negative pressure suction generated by the induced draft fan 702, the exhaust gas is sent to the bottom of the pretreatment cylinder 3 through the vent pipe 202. Upon entering the bottom of the pretreatment cylinder 3, the exhaust gas first passes through the grid plate 402 at the bottom of the regulating cylinder 4 into its internal space. This internal space forms a primary buffer chamber, which can initially stabilize the flow of the newly entered exhaust gas. Inside the regulating cylinder 4, the exhaust gas then exits through the mesh 401 on its outer circumference, enters the guide box 301, and finally flows to the main exhaust gas treatment equipment 8 via the connecting pipe 7. At this time, the pressure sensor 701 monitors the pressure inside the connecting pipe 7 in real time. This pressure value is directly related to the exhaust gas flow rate. When excessive flow is detected (such as during mold opening), the PLC controller instructs the electric hydraulic rod 5 to actuate, pushing the regulating cylinder 4 upwards. The rise of the regulating cylinder 4 changes the relative position of the mesh 401 and the inlet of the guide box 301, reducing the effective overlap area. This is equivalent to closing the exhaust window, increasing the resistance to exhaust gas discharge from the inside, thereby limiting the exhaust gas flow rate during peak periods. When the exhaust gas volume decreases, the regulating cylinder 4 descends, increasing the effective flow area of ​​the mesh 401, ensuring that the exhaust gas can be drawn away in a timely manner.

[0032] After the aforementioned buffering and flow stabilization, the waste gas enters the main waste gas treatment equipment 8 at a stable and appropriate flow rate. Stable flow rate is crucial for the main treatment equipment, as it improves the efficiency and lifespan of activated carbon adsorption or catalytic combustion. It also maintains the thermal balance of thermal incineration equipment (such as RTO), saving energy. Furthermore, it ensures the stable progress of chemical reactions (such as spray absorption). Finally, the thoroughly purified gas is safely discharged.

[0033] The stationary scraper 602 scrapes away contaminants from the inner wall of the regulating cylinder 4 as it rises and falls, preventing the mesh 401 from becoming clogged. Contaminants can be collected at the bottom of the pretreatment cylinder 3 and discharged through the slag discharge pipe 302.

[0034] It should be noted that the main exhaust gas treatment equipment 8 is one of the following: a spray tower, an activated carbon adsorption box, a catalytic combustion device (RCO), or a regenerative thermal oxidizer (RTO). When the electric hydraulic rod 5 is in the extension / retraction state, all the mesh holes 401 on the regulating cylinder 4 are aligned with the guide box 301, and the mesh holes 401 and the guide box 301 do not overlap. At this time, the amount of exhaust gas entering the connecting pipe 7 is at its maximum. The extension of the output end of the electric hydraulic rod 5 can push the regulating cylinder 4 to move, thereby reducing the overlap area between the mesh holes 401 and the guide box 301, which can adjust the amount of exhaust gas entering the connecting pipe 7. The electric hydraulic rod 5 is raised and lowered by the PLC controller, which changes the overlap area between the mesh holes 401 and the guide box 301, thereby realizing the dynamic adjustment of the exhaust gas flow rate.

[0035] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A waste gas collection and treatment device for tire vulcanization process, comprising a base plate (1) and a tire vulcanizing machine (2) disposed on the top of the base plate (1), wherein a gas collection hood (201) is fixedly installed on the top of the tire vulcanizing machine (2), characterized in that: It also includes an exhaust gas pretreatment mechanism located outside the tire vulcanizing machine (2) and a main exhaust gas treatment device (8). The exhaust gas pretreatment mechanism includes a pretreatment cylinder (3), which is fixed to the top of the base plate (1) by a support leg, and a ventilation pipe (202) is connected between the top of the gas collection hood (201) and the bottom of the outer wall of the pretreatment cylinder (3). The pretreatment cylinder (3) has a lantern-shaped guide box (301) fixedly connected to the middle of its cylinder wall. The guide box (301) is connected to the air inlet of the main exhaust gas treatment equipment (8) through a connecting pipe (7). The pretreatment cylinder (3) is fitted with a liftable regulating cylinder (4). The regulating cylinder (4) is slidably sealed to the inner wall of the pretreatment cylinder (3). Multiple mesh holes (401) are opened through the middle of the outer circumference of the regulating cylinder (4), and a grid plate (402) is fixedly installed through the bottom of the regulating cylinder (4). The connecting pipe (7) is provided with a blower (702) and a pressure sensor (701) in sequence along the airflow direction. The relative overlap area between the mesh (401) and the guide box (301) can be changed by driving the regulating cylinder (4) to rise and fall, thereby adjusting the flow rate of the exhaust gas entering the main exhaust gas treatment equipment (8); the grid plate (402) is used to maintain the basic airflow channel when the regulating cylinder (4) is at different heights.

2. The waste gas collection and treatment device for the tire vulcanization process according to claim 1, characterized in that: An electric hydraulic rod (5) is installed at the bottom of the pretreatment cylinder (3). The output end of the electric hydraulic rod (5) passes through the bottom of the pretreatment cylinder (3) and is sealed to the bottom of the pretreatment cylinder (3) through a mechanical seal. The end of the output end of the electric hydraulic rod (5) is fixedly connected to the bottom of the regulating cylinder (4).

3. The waste gas collection and treatment device for the tire vulcanization process according to claim 1, characterized in that: A fixing rod (6) is fixedly connected to the top of the pretreatment cylinder (3). The fixing rod (6) extends downward and passes through the top of the regulating cylinder (4), and the two are dynamically connected by a mechanical seal. A fixing disk (601) located inside the regulating cylinder (4) is fixedly connected to the bottom of the fixing rod (6). A scraper (602) is fixedly installed on the outer circumference of the fixing disk (601). The edge of the scraper (602) abuts against the inner side wall of the regulating cylinder (4).

4. The waste gas collection and treatment device for the tire vulcanization process according to claim 1, characterized in that: The inner wall of the pretreatment cylinder (3) is fitted with a sealing ring (303) that is tightly connected to the regulating cylinder (4) through a groove.

5. The waste gas collection and treatment device for the tire vulcanization process according to claim 1, characterized in that: The bottom surface inside the pretreatment cylinder (3) is inclined, and a slag discharge pipe (302) is connected to its lowest point. A discharge valve is installed on the slag discharge pipe (302).

6. The waste gas collection and treatment device for the tire vulcanization process according to claim 1, characterized in that: The detection end of the pressure sensor (701) is located inside the connecting pipe (7).

Images