Rubber vulcanization fume collecting balance distribution device and fume collecting system

Abstract

The utility model relates to a kind of rubber vulcanization flue gas collection balanced distribution device, including multiple collection balanced distribution devices;The collection balanced distribution device is a bend pipe head joint, the bend pipe joint has the air inlet for being connected with branch air pipe, and the air outlet after bending towards the exhaust direction of main air pipe;The air inlet area of collection balanced distribution device is B, and the air outlet area is A;The A is less than B, and the inside of collection balanced distribution device forms the flow limiting of diameter reduction;The parameter K=A / B of multiple collection balanced distribution devices respectively, along the direction of main air pipe, generally show downward trend, and the parameter K of each collection balanced distribution device meets the exhaust capacity design value range of corresponding vulcanizing machine itself;The range of K value is 0.2≤K<1.0.The utility model is specially aimed at rubber industry vulcanization workshop flue gas collection system, design a kind of efficient, economical, simple operation rubber vulcanization flue gas collection balanced distribution device, the device can realize the reasonable distribution of each branch pipe air volume of collection system, and realize the air pressure balance of each branch pipe.

Description

Technical Field

[0001] This utility model relates to a rubber vulcanization fume collection and distribution device and a fume collection system, belonging to the field of rubber vulcanization fume collection technology. Background Technology

[0002] The flue gas produced in vulcanization workshops in the rubber tire industry has a complex composition. A single vulcanizing trench typically has 24-36 vulcanizing machines. However, not all vulcanizing machines operate simultaneously; the number of machines operating concurrently varies from a few to a dozen per hour. The specific machines operating within a given hour are unpredictable. Once a vulcanizing machine starts operating, the flue gas needs to be collected as quickly as possible. Because the operating time of a single vulcanizing machine is short, most tire companies use individual enclosures for collection. The total flue gas volume in the entire vulcanizing trench is large (up to 80,000 m³ / s). 3 / h)~140,000m 3 Designing a high-efficiency flue gas collection system for vulcanizing trenches is a challenge. Currently, the main duct of rubber vulcanizing flue gas collection systems is mainly equipped with manual and electric valves to regulate the flue gas volume and balance the air pressure in each branch pipe. Considering the large number of devices in each vulcanizing trench in a vulcanizing workshop (generally 24-36 units), this method involves a large amount of initial commissioning work and is quite difficult. Moreover, the flue gas collection effect is not obvious, the air volume distribution in each branch pipe is unreasonable, the air pressure in each branch pipe cannot be effectively balanced, and the workshop environment is not improved. With the above method, the air volume distribution in each branch pipe is unreasonable, resulting in poor collection effect; in order to achieve the collection effect, the system design air volume is increased, resulting in a large project investment cost and high equipment operating cost.

[0003] Regarding the design of using distribution devices to solve similar problems, the existing technology mainly designs distribution devices for equipment (such as scrubbing towers and reactors), which is not suitable for pipelines of rubber tire vulcanization fume collection systems. Currently, there is no balanced distribution device designed for pipelines of rubber tire vulcanization fume collection systems.

[0004] For example, Chinese patent document CN216023880U, published on March 15, 2022, discloses a gas distributor, relating to the technical field of gas distributors used in scrubbing towers, and particularly to a gas distributor comprising: a tower body, a support mechanism, a baffle mechanism, a flow guiding mechanism, and a bottom support frame; an air inlet for air intake is provided on one side of the bottom of the tower body; the support mechanism is disposed on the inner wall of the tower body, the baffle mechanism is disposed on the support mechanism and the support mechanism is located at the air inlet, and the flow guiding mechanism is disposed on both sides of the baffle mechanism; this gas distributor, by setting multiple flow guiding plates at the air inlet, allows gas to enter the tower body from the air inlet pipe at the bottom of the device, and after being evenly distributed to both sides by the flow guiding plates, rises and then evenly passes through the packing, effectively improving the distribution of flue gas after entering the scrubbing tower, allowing the gas to contact the liquid more evenly at the packing, and reducing the distance required for the gas to rise, thus effectively reducing the height between the gas inlet and the packing. The aforementioned patents mainly design distribution devices for equipment (such as scrubbing towers) and are not suitable for pipelines in rubber tire vulcanization fume collection systems. Currently, there is no design for a balanced distribution device for rubber tire vulcanization fume collection systems.

[0005] In summary, the shortcomings of existing technologies are:

[0006] 1) Existing technologies mainly design distribution devices for equipment (such as scrubbing towers, reactors, etc.), which are not suitable for pipelines of rubber tire vulcanization fume collection systems. Currently, there is no balanced distribution device designed for pipelines of rubber tire vulcanization fume collection systems.

[0007] 2) Currently, the main air duct of the rubber vulcanization fume collection system is mainly equipped with manual valves and electric valves to adjust the air volume of each branch pipe and balance the air pressure. Considering that there are many vulcanization trenches in each vulcanization workshop (generally 24 to 36 units), this method requires a large amount of initial debugging work and is difficult. Moreover, the fume collection effect is not obvious, the air volume distribution of each branch pipe is uneven, the air pressure of each branch pipe cannot be effectively balanced, and the workshop environment is not improved.

[0008] 3) Uneven air volume distribution in each branch pipe results in poor collection effect; in order to achieve the collection effect, the system design air volume is increased, which leads to a larger project investment cost and higher equipment operating cost. Utility Model Content

[0009] This invention aims to design a high-efficiency, economical, and simple-to-operate flue gas collection and distribution device specifically for flue gas collection systems in rubber vulcanization workshops. This device can achieve reasonable distribution of airflow in each branch pipe of the collection system and balance the air pressure in each branch pipe. The device is simple, requires no intelligent control, is easy to manufacture and install, and is simple and convenient to manage and maintain. This device enables effective collection of flue gas from the collection hood in rubber tire vulcanization workshops, improves flue gas collection efficiency, improves the workshop environment to a certain extent, reduces project investment costs, and has low operating costs, making it suitable for large-scale application in rubber tire vulcanization workshops.

[0010] The present invention adopts the following technical solution:

[0011] A rubber vulcanizing fume collection and distribution device includes multiple collection and distribution devices 3; each collection and distribution device 3 is a bent pipe joint, which has an air inlet for connecting to a branch duct and an air outlet facing the exhaust direction of the main duct after bending; the air inlet area of ​​the collection and distribution device 3 is B, and the air outlet area is A; A is less than B, forming a narrowing and flow-limiting effect inside the collection and distribution device 3; the parameter K of each of the multiple collection and distribution devices 3 is K = A / B, which generally shows a decreasing trend along the direction of the main duct, and the parameter K of each collection and distribution device 3 conforms to the exhaust volume design value range of the corresponding vulcanizing machine; the range of K value is 0.2-1.0 (excluding 1.0).

[0012] Two points need to be explained in this technical solution:

[0013] First, the purpose of A being smaller than B is to create a narrower diameter and flow restriction. However, narrower diameter and flow restriction is only the first step and cannot fully realize the function we need. What we really need is to obtain the appropriate air volume for each vulcanizing machine in the entire system environment with multiple vulcanizing machines, corresponding to its own exhaust volume.

[0014] Second, the parameters K of each of the multiple collection and distribution devices 3 generally show a downward trend along the direction of the main duct. Here, "generally" means that there may be individual exceptions. For example, when a certain vulcanizing machine requires a large exhaust air volume, its parameter K may be larger than the previous one. However, the value of K generally needs to have a downward trend because the closer to the fan, the greater the gas flow pressure in the main duct. In order to maintain a suitable flow rate, the K value of the branch duct should decrease accordingly.

[0015] Preferably, the exhaust volume design value range of each vulcanizing machine is the same, and the parameters K=A / B of each of the multiple collection and balance distribution devices 3 show a strict downward trend along the direction of the main air duct.

[0016] Preferably, the elbow joint is welded and fixed to the inner wall of the main air duct. The bending angle of the elbow joint is 80°-100°, preferably 90°. However, if the main duct itself has a certain degree of pipe wall non-straightness, the elbow joint can deviate slightly from 90°, but generally remain around 90°.

[0017] Preferably, the air inlet areas B of the multiple collection and balancing distribution devices 3 are equal. In order to simplify the system design, the area B is set to be the same for all of them. Then, only the different areas A need to be adjusted, which is conducive to the standardized design of the collection and balancing distribution devices 3.

[0018] A rubber vulcanization fume collection system includes the aforementioned rubber vulcanization fume collection and distribution device; it also includes a main duct, which has a stepped diameter expansion structure along the exhaust direction; branch ducts 2, which are connected to the air inlets of each of the collection and distribution devices 3 on the main duct; and electric valves 1, which are installed on each branch duct 2.

[0019] Preferably, the branch duct 2 is perpendicular to the main duct or at an angle inclined towards the exhaust direction.

[0020] Preferably, the branch ducts 2 are arranged in pairs at a specific length position of the main duct.

[0021] A method for collecting and balancing the distribution of rubber vulcanizing fumes includes installing collection and balancing distribution devices 3 at corresponding positions on each branch duct of the main duct. Each collection and balancing distribution device 3 is a bent pipe connector with an inlet for connecting to the branch duct and an outlet facing the exhaust direction of the main duct after bending. The inlet area of ​​the collection and balancing distribution device 3 is B, and the outlet area is A. A is less than B, creating a narrowing and flow-limiting effect within the collection and balancing distribution device 3. The parameter K of each of the multiple collection and balancing distribution devices 3 is K = A / B, generally decreasing along the direction of the main duct. The parameter K of each collection and balancing distribution device 3 conforms to the design range of the corresponding vulcanizing machine's exhaust volume.

[0022] Preferably, the exhaust volume design value range of each vulcanizing machine is the same, and the parameters K=A / B of each of the multiple collection and balance distribution devices 3 show a strict downward trend along the direction of the main air duct.

[0023] Preferably, the K value of each collection and distribution device 3 is obtained by a combination of testing and calculation; the parameters collected during testing include: the exhaust gas volume of each branch pipe 2, the inlet and outlet cross-sectional dimensions of each bend joint during testing, the distance between the location of each branch pipe 2 and the main fan, and the resistance value of the location of each branch pipe 2; the resistance value is collected by a pressure sensor, and the exhaust gas volume of each branch pipe 2 is collected by an air volume sensor.

[0024] The beneficial effects of this utility model are as follows:

[0025] 1) A highly efficient, economical, and easy-to-operate flue gas collection and distribution device for rubber vulcanization workshops is designed specifically for this purpose. This device can achieve reasonable distribution of airflow in each branch pipe of the collection system and balance the air pressure in each branch pipe.

[0026] 2) The device is not complicated, does not require intelligent control, is simple to manufacture and install, and is easy to manage and maintain.

[0027] 3) This device enables the effective collection of flue gas from the collection hood in the vulcanization workshop of the rubber tire industry, improves the flue gas collection efficiency, improves the workshop environment to a certain extent, reduces project investment costs, and has low operating costs, which is conducive to its large-scale use in the vulcanization workshop of the rubber tire industry. Attached Figure Description

[0028] Figure 1 This is an attached drawing showing the left side of the rubber vulcanization fume collection and distribution device of this utility model.

[0029] Figure 2 This is an attached drawing showing the middle part of the rubber vulcanization fume collection and distribution device of this utility model.

[0030] Figure 3 This is an attached drawing showing the right side of the rubber vulcanization fume collection and distribution device of this utility model.

[0031] Figure 4 This is a schematic diagram of the overall structure of the rubber vulcanization fume collection and distribution device of this utility model.

[0032] In the diagram, 1. Electric valve, 2. Branch duct, 3. Collection and distribution device. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] Figure 1 , Figure 2 , Figure 3 The three images can be pieced together from left to right to form a complete large image.

[0035] See Figure 1-3A rubber vulcanizing fume collection and distribution device includes multiple collection and distribution devices 3; each collection and distribution device 3 is a bent pipe joint, which has an air inlet for connecting to a branch duct and an air outlet facing the exhaust direction of the main duct after bending; the air inlet area of ​​the collection and distribution device 3 is B, and the air outlet area is A; A is less than B, forming a narrowing and flow-limiting effect inside the collection and distribution device 3; the parameter K of each of the multiple collection and distribution devices 3 is K = A / B, which generally shows a decreasing trend along the direction of the main duct, and the parameter K of each collection and distribution device 3 conforms to the exhaust volume design value range of the corresponding vulcanizing machine; the range of K value is 0.2-1.0 (excluding 1.0, including 0.2).

[0036] Two points need to be clarified here:

[0037] First, the purpose of A being smaller than B is to create a narrower diameter and flow restriction. However, narrower diameter and flow restriction is only the first step and cannot fully realize the function we need. What we really need is to obtain the appropriate air volume for each vulcanizing machine in the entire system environment with multiple vulcanizing machines, which corresponds to its own exhaust volume. The role of narrower diameter and flow restriction is to realize the active flow control function.

[0038] Second, the parameters K of each of the multiple collection and distribution devices 3 generally show a downward trend along the direction of the main duct. Here, "generally" is used because there may be individual exceptions. For example, when a certain vulcanizing machine requires a large exhaust air volume, its parameter K may be larger than the previous one. However, the value of K generally needs to have a downward trend because the closer to the fan, the greater the gas flow pressure in the main duct. In order to maintain a suitable flow rate, the K value of the branch duct should decrease accordingly.

[0039] In this embodiment, the exhaust volume design range for each vulcanizing machine is the same, and the parameter K = A / B of each of the multiple collection and balancing distribution devices 3 exhibits a strictly decreasing trend along the main air duct. This is because the air pressure is greater closer to the fan, and therefore the K value is smaller. Having the same exhaust volume design range for each vulcanizing machine also facilitates the overall design arrangement.

[0040] In this embodiment, see Figure 1-3 The elbow joint is welded and fixed to the inner wall of the main air duct. The bending angle of the elbow joint is 80°-100°, preferably 90°. However, if the main duct itself has a certain degree of pipe wall non-straightness, the elbow joint can deviate from 90° at the corresponding angle, but it is generally around 90°.

[0041] In this embodiment, the air inlet areas B of the multiple collection and distribution devices 3 are equal. In order to simplify the system design, the area B is set to be the same for all of them. Then, only the different areas A need to be adjusted, which is conducive to the standardized design of the collection and distribution devices 3.

[0042] See also Figure 1-3 A rubber vulcanization fume collection system includes the aforementioned rubber vulcanization fume collection and distribution device; it also includes a main duct, which has a stepped diameter expansion structure along the exhaust direction; branch ducts 2, which are connected to the air inlets of each of the collection and distribution devices 3 on the main duct; and electric valves 1, which are installed on each branch duct 2.

[0043] Regarding electric valve 1, the frequency of control operations required in this solution is relatively low (because the exhaust requirements of each vulcanizing machine are already met by the balancing distribution device 3), so it does not affect the reliability of the solution. In existing technologies, the valves in this area are either manually operated, requiring little operation and relying on increasing the total power of the blowers to meet the exhaust volume requirements of each vulcanizing machine; or adjustable valves are used, where the flow rate of each branch pipe is adjusted by changing the valve opening. The reliability of this type of valve adjustment is low, and if an electric valve is used, the reliability would be even lower.

[0044] In this embodiment, the branch duct 2 is perpendicular to the main duct or forms an inclined angle towards the exhaust direction. (See attached image) Figure 1-3 The image shows a vertical shape, but in practice it can also have a certain angle.

[0045] In this embodiment, such as Figure 1-3 The branch ducts 2 are arranged in pairs at a specific length position of the main duct.

[0046] See Figure 1-3 A method for collecting and balancing the distribution of rubber vulcanizing fumes is disclosed, comprising a collection and balancing distribution device 3 installed at corresponding positions on each branch duct of the main duct; the collection and balancing distribution device 3 is a bent pipe joint, which has an air inlet for connecting to the branch duct and an air outlet facing the exhaust direction of the main duct after bending; the air inlet area of ​​the collection and balancing distribution device 3 is B, and the air outlet area is A; A is less than B, forming a narrowing and flow-limiting effect inside the collection and balancing distribution device 3; the parameter K of each of the multiple collection and balancing distribution devices 3 is K = A / B, which generally shows a decreasing trend along the direction of the main duct, and the parameter K of each collection and balancing distribution device 3 conforms to the exhaust volume design value range of the corresponding vulcanizing machine itself.

[0047] The exhaust volume design values ​​of each vulcanizing machine are the same, and the parameters K=A / B of each of the multiple collection and balance distribution devices 3 show a strict downward trend along the direction of the main air duct.

[0048] The K value of each collection and distribution device 3 is obtained by a combination of testing and calculation. The parameters collected during the test include: the exhaust gas volume of each branch pipe 2, the inlet and outlet cross-sectional dimensions of each bend joint during the test, the distance between the location of each branch pipe 2 and the main fan, and the resistance value of the location of each branch pipe 2. The resistance value is collected by a pressure sensor, and the exhaust gas volume of each branch pipe 2 is collected by an air volume sensor.

[0049] As for how to set pressure sensors and air volume sensors, and how to obtain the K value corresponding to each balance distribution device 3 through calculation, these are not the contents to be discussed in this utility model, because these contents can be obtained by those skilled in the art through testing and calculation based on physical and mathematical knowledge.

[0050] Finally, the process is described below with reference to a specific case:

[0051] To ensure optimal gas collection efficiency in the vulcanizing troughs and to achieve a reasonable distribution of flue gas collection volume and balanced air pressure across all vulcanizing machines, the system is designed with a flue gas collection balancing distribution device (or flue gas balancing distributor) to minimize the difference in collection volume between the various vulcanizing machines. Specific details are as follows:

[0052] Taking one of the vulcanizing trenches in a vulcanizing workshop of a tire company as an example, the number of vulcanizing machines operating simultaneously is 12 (the number of vulcanizing machines operating simultaneously can be adjusted). In reality, the simultaneous operation of the vulcanizing machines is random, not a fixed set of vulcanizing machines. Based on the orderly distribution of vulcanizing machines in the vulcanizing workshop, the distance between the collection hoods above each vulcanizing machine and the end exhaust fan varies, resulting in different pipe resistances from each collection hood to the exhaust fan. When the exhaust fan is turned on, in order to balance the air volume and resistance of each collection hood, we have equipped each branch duct with an electric air valve and a flue gas collection and balancing distribution device at the inlet of the branch duct above the collection hood and the main duct above the vulcanizing ditch. The flue gas collection and balancing distribution device consists of a cleverly designed reducer (i.e., a bend joint with an angle of 80° to 100°, a diameter change) and special components with a certain proportional relationship between the inlet cross-section and the outlet cross-section. The vulcanizing machine farther away from the exhaust fan has a larger opening area for the corresponding balancing distribution device above it, and the vulcanizing machine closer to the exhaust fan has a smaller opening area for the corresponding balancing distribution device above it. Based on the distance between the vulcanizing machine and the exhaust fan from near to far (from small to large), the opening area of ​​each distributor is reasonably increased accordingly. The air volume and resistance between each collection hood are balanced by the adjustment function of the balancing distribution device, thereby achieving a reasonable distribution of air volume and air pressure balance between each collection hood.

[0053] A special component (where A = B * K, K is obtained through simulation calculation, and the value of K ranges from 0.2 to 1.0) is composed of an inlet cross-section (the cross-section can be circular, rectangular, or elliptical, and the cross-sectional area is B) and an outlet cross-section (the cross-section can be circular, rectangular, or elliptical, and the cross-sectional area is A) that are in a certain proportional relationship. Electric air valves are also installed on the branch ducts at the inlet of each collection and balancing distribution device.

[0054] Specifically, in this case, the values ​​of K for the collection and balance distribution device 3 of the 12 vulcanizing machines are 0.85, 0.80, 0.75, 0.70, 0.65, 0.60, 0.55, 0.50, 0.45, 0.40, 0.35, and 0.30, and the value decreases along the direction of the main air duct.

[0055] In summary, this device can achieve reasonable distribution of airflow in each branch pipe of the collection system and balance of air pressure in each branch pipe. The device is not complex, requires no intelligent control, is simple to manufacture and install, and is easy to manage and maintain. This device enables effective collection of flue gas from vulcanizing workshops in the rubber tire industry, improving flue gas collection efficiency, improving the workshop environment to a certain extent, reducing project investment costs, and having low operating costs, making it suitable for large-scale application in vulcanizing workshops of the rubber tire industry.

[0056] The above are preferred embodiments of the present utility model. Those skilled in the art can make various changes or improvements based on this. Without departing from the overall concept of the present utility model, these changes or improvements should all fall within the scope of protection claimed by the present utility model.

Claims

1. A rubber vulcanization fume collection and distribution device, characterized in that: Includes multiple collection and balancing distribution devices (3); The collection and balance distribution device (3) is a bent pipe joint, which has an air inlet for connecting with the branch pipe and an air outlet facing the exhaust direction of the main pipe after bending. The air inlet area of ​​the collection and balancing distribution device (3) is B, and the air outlet area is A; A is smaller than B, forming a narrowing and flow-limiting effect inside the collection and balancing distribution device (3); The parameters K = A / B of each of the multiple collection and balancing distribution devices (3) generally show a downward trend along the direction of the main air duct. The parameters K of each collection and balancing distribution device (3) are within the range of the exhaust volume design value of the corresponding vulcanizing machine. The range of K values ​​is 0.2 ≤ K < 1.

0.

2. The rubber vulcanization fume collection and distribution device as described in claim 1, characterized in that: The exhaust volume design value range of each vulcanizing machine is the same, and the parameters K = A / B of each of the multiple collection and balance distribution devices (3) show a strict downward trend along the direction of the main air duct.

3. The rubber vulcanization fume collection and distribution device as described in claim 1, characterized in that: The elbow joint is welded and fixed to the inner wall of the main air duct, and the bending angle of the elbow joint is 80°-100°.

4. The rubber vulcanization fume collection and distribution device as described in claim 1, characterized in that: The air inlet area of ​​multiple collection and distribution devices (3) is equal to B.

5. A rubber vulcanization fume collection system, characterized in that: Includes the rubber vulcanization fume collection and distribution device according to any one of claims 1-4; also include, The main air duct has a stepped diameter expansion structure along the exhaust direction; Branch duct (2), which is connected to the air inlet of each of the collection and balance distribution devices (3) on the main duct; Electric valve (1), which is installed on each branch pipe (2).

6. The rubber vulcanization fume collection system as described in claim 5, characterized in that: The branch duct (2) is perpendicular to the main duct or at an angle to the direction of exhaust.

7. The rubber vulcanization fume collection system as described in claim 5, characterized in that: The branch ducts (2) are arranged in pairs at a specific length position of the main duct.

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