Waste gas collection system for chemical production

Abstract

The utility model discloses a kind of waste gas collection systems for chemical production, it is related to chemical production waste gas collection technical field, the utility model includes RTO waste gas treatment equipment, and a plurality of production lines one-to-one corresponding dispersion die head and fume hood being set at dispersion die head, it is characterized by: the dispersion die head bottom is fixedly connected with the multiple orifice plate of dense glue hole, the fume hood is set below dispersion die head, the suction port of the fume hood is set along horizontal direction to glue hole, the fume hood is communicated with RTO waste gas treatment equipment by suction pipe;By the setting of structure, waste gas condensate can be prevented from dropping on adhesive tape, and product quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to a waste gas collection system, and more specifically, it relates to a waste gas collection system for chemical production. Background Technology

[0002] In chemical production, such as the production of ABS / SAN, molten ABS / SAN is usually extruded through an extrusion device and then dispersed into strips of appropriate size by a dispersing die equipped with a perforated plate. These strips are then fed into a pelletizer for pelletizing, thus forming ABS / SAN granules. Due to the inherent properties of the material, waste gas is generated between the high-temperature molten ABS / SAN flowing out of the pelletizer.

[0003] Currently, most methods for collecting exhaust gas at the die head involve installing an air suction device on top of the die head, along with a fume hood for the suction. This device draws the exhaust gas into the RTO exhaust gas treatment equipment. However, with prolonged use, exhaust gas condenses on the inner wall of the fume hood. Furthermore, because the suction device is located at the top, the condensate drips onto the rubber strip and the pelletizer inlet due to gravity, producing discolored particles that severely affect product quality.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a waste gas collection system for chemical production. Through the design of the structure, it can prevent waste gas condensate from dripping onto the rubber strip, thus ensuring product quality.

[0006] The technical solution of this utility model is:

[0007] A waste gas collection system for chemical production includes an RTO waste gas treatment device, a dispersing die head corresponding to multiple production lines, and a fume hood installed at the dispersing die head. The bottom of the dispersing die head is fixedly connected to a perforated plate with densely distributed glue outlet holes. The fume hood is installed below the dispersing die head, and the air intake of the fume hood is arranged horizontally towards the glue outlet holes. The fume hood is connected to the RTO waste gas treatment device through an air intake pipe.

[0008] The present invention is further configured such that the smoke hood is disposed on the outer peripheral wall of the air inhalation pipe.

[0009] The present invention is further configured such that the length of the smoke hood is greater than the length of the perforated plate, the cross-section of the smoke hood is trapezoidal and the width gradually increases from the direction away from the air inlet pipe, while the length remains unchanged.

[0010] The present invention is further configured such that the cross-section of the fume hood is a right-angled trapezoid and the right-angled side is located away from the dispersion mold head.

[0011] The present invention is further configured such that a drain port is provided on one side of the fume hood, and a valve is connected to the drain port.

[0012] The present invention is further configured such that a regulating valve is connected to the air intake pipe.

[0013] The present invention is further configured such that the suction pipes on the multiple fume hoods are all connected through a first main pipe, and a switch valve is connected between the first main pipe and each suction pipe. The air inlet of the RTO exhaust gas treatment equipment is provided with a second main pipe, and a number of second branch pipes are connected to the second main pipe. Each second branch pipe is connected to an exhaust fan. The number of second branch pipes is at least two. The air inlet of the exhaust fan is connected to a first branch pipe and is connected to the first main pipe.

[0014] The beneficial technical effects of this utility model are:

[0015] By placing the fume hood below the dispersing die and setting its intake port horizontally towards the glue outlet, the fume hood's air extraction method is changed from top extraction to extraction from the rear side below the dispersing die, with the intake port facing the pelletizer side. This structural change shortens the exhaust gas diffusion path, reduces the residence time of exhaust gas in the air, and lowers the possibility of exhaust gas condensation. Even if condensation occurs, because the air is drawn from the side, the condensate will not drip onto the glue strip, reducing glue residue and improving product quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural schematic diagram of the smoke hood of this utility model.

[0018] In the diagram, 1 is the fume hood; 2 is the dispersion head; 21 is the perforated plate; 3 is the suction pipe; 4 is the RTO exhaust gas treatment equipment; 5 is the exhaust fan; 6 is the drain port; and 7 is the regulating valve. Detailed Implementation

[0019] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0020] A waste gas collection system for chemical production, in a plant with multiple production lines, such as... Figure 1 and 2As shown, the collection system includes an RTO exhaust gas treatment device 4, a dispersing die head 2 corresponding to multiple production lines, and a fume hood 1 set at the dispersing die head 2. A perforated plate 21 with dense glue outlet holes is fixedly connected to the bottom of the dispersing die head 2, so that the glue outlet of the dispersing head is set vertically downward. The fume hood 1 is set below the dispersing die head 2, and the air intake of the fume hood 1 is set horizontally towards the glue outlet. The fume hood 1 is connected to the RTO exhaust gas treatment device 4 through the air intake pipe 3. There is a gap of 2cm between the top of the fume hood 1 and the dispersing die head 2. The distance between the air intake of the fume hood 1 and the glue strip is 6cm. The air intake method of the fume hood 1 is changed from top air intake to air intake from the rear side below the dispersing die head 2. The air intake of the fume hood 1 faces the pelletizer side. This structural change shortens the exhaust gas diffusion path, reduces the residence time of exhaust gas in the air, reduces the possibility of exhaust gas condensation, and even if condensation occurs, since the air is drawn from the side, the condensate will not drip onto the glue strip, reducing glue residue and improving product quality.

[0021] The fume hood 1 is installed on the outer peripheral wall of the suction pipe 3. The cross-section of the fume hood 1 is trapezoidal. The side of the fume hood 1 closest to the suction pipe 3 has a width of 4cm and a length of 100cm, while the side furthest from the suction pipe 3 has a width of 5cm and a length of 100cm. This allows the width to gradually increase from the direction away from the suction pipe 3 while the length remains constant, thereby expanding the suction port to form a funnel shape. Furthermore, the length of the fume hood 1 is greater than the length of the perforated plate 21, ensuring suction efficiency. More specifically, the cross-section of the fume hood 1 is set as a right-angled trapezoid with the right-angled side furthest from the dispersing die head 2. Since the bottom is a right-angled side rather than a hypotenuse, it better ensures that when condensate occurs, it will not fall down the inner bottom wall of the fume hood 1 and onto the rubber strip. Moreover, since the fume hood 1 is set on the side of the rubber strip, it does not need to completely cover the entire dispersing die head 2, reducing the area of ​​the suction port and thus increasing the negative pressure at the suction port, further improving the exhaust gas collection effect.

[0022] A drain port 6 is provided on one side of the fume hood 1 and is connected to a valve. After a period of use, condensate will accumulate inside the fume hood 1. At this time, the drain port 6 can be opened through the valve to discharge the condensate regularly, which effectively reduces the impact of exhaust gas condensation dripping on the rubber strip, reduces the generation of discolored particles, and improves product quality.

[0023] Multiple exhaust pipes 3 on the fume hoods 1 are connected to a first main pipe, and a switch valve is connected between the first main pipe and each exhaust pipe 3 to control the connection between the first main pipe and each exhaust pipe 3. A regulating valve 7 is also connected to each exhaust pipe 3; specifically, the regulating valve 7 can be a butterfly valve. By setting the butterfly valve, the airflow of the pipe can be adjusted, and it also facilitates single-line shutdown, disassembly, and cleaning; effectively controlling the air intake pressure of the fume hood 1, thereby stabilizing the rubber strip. The air inlet of the RTO exhaust gas treatment equipment 4 is equipped with a second main pipe, to which several second branch pipes are connected. Each second branch pipe is connected to an exhaust fan 5. The number of second branch pipes is at least two, but can be four. There are also four exhaust fans 5. The air intake of each exhaust fan 5 is connected to a first branch pipe and connected to the first main pipe. Furthermore, each first branch pipe and the second branch pipe... Switch valves can be installed on each pipe to control the opening and closing of each first and second branch pipe. Through the above pipeline arrangement, since the fume hood 1 is located on the side of the rubber strip, it does not need to completely cover the entire dispersion head 2, reducing the area of ​​the air intake and thus increasing the negative pressure at the air intake. During normal operation, only one exhaust fan 5 is needed, which can be connected to the first main pipe. Opening each switch valve on the first main pipe allows connection to each fume hood 1, enabling each fume hood 1 to perform air intake. This eliminates the need for an exhaust fan 5 for each fume hood 1, reducing the number of fans in operation and lowering energy consumption. Furthermore, when an exhaust fan 5 is damaged, simply closing the switch valve at that exhaust fan 5 and opening the switch valve of another exhaust fan 5 allows maintenance work to be completed without stopping the entire system, ensuring work efficiency.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A waste gas collection system for chemical production, comprising an RTO waste gas treatment device (4), a dispersing die (2) corresponding to multiple production lines, and a fume hood (1) disposed at the dispersing die (2), characterized in that: The bottom of the dispersing die (2) is fixedly connected to a perforated plate (21) with dense glue outlet holes. The fume hood (1) is set below the dispersing die (2). The air inlet of the fume hood (1) is set horizontally toward the glue outlet hole. The fume hood (1) is connected to the RTO waste gas treatment equipment (4) through the air inlet pipe (3).

2. The waste gas collection system for chemical production according to claim 1, characterized in that: The smoke hood (1) is installed on the outer peripheral wall of the air intake pipe (3).

3. The waste gas collection system for chemical production according to claim 1, characterized in that: The length of the smoke hood (1) is greater than the length of the perforated plate (21). The cross-section of the smoke hood (1) is trapezoidal and its width gradually increases from the direction away from the inhalation pipe (3), while its length remains unchanged.

4. The waste gas collection system for chemical production according to claim 3, characterized in that: The cross-section of the fume hood (1) is a right-angled trapezoid with the right-angled side located away from the dispersion mold head (2).

5. The waste gas collection system for chemical production according to claim 1, characterized in that: The fume hood (1) has a drain port (6) on one side, and a valve is connected to the drain port (6).

6. The waste gas collection system for chemical production according to claim 1, characterized in that: A regulating valve (7) is connected to the air intake pipe (3).

7. The waste gas collection system for chemical production according to claim 1, characterized in that: The suction pipes (3) on the multiple fume hoods (1) are all connected through the first main pipe, and the first main pipe is connected to each suction pipe (3) by a switch valve. The air inlet of the RTO exhaust gas treatment equipment (4) is provided with a second main pipe, and several second branch pipes are connected to the second main pipe. Each second branch pipe is connected to an exhaust fan (5). The number of second branch pipes is at least two. The suction end of the exhaust fan (5) is connected to the first branch pipe and is connected to the first main pipe.

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