Waste gas treatment system

Abstract

The utility model discloses a waste gas treatment system which is used for treating waste gas generated by an impregnation machine, the waste gas treatment system comprises a combustion chamber, a gas inlet pipeline, a gas outlet pipeline and a protection pipeline, and the combustion chamber is provided with a gas inlet and a gas outlet; one end of the gas inlet pipeline is communicated with the gas inlet, and the other end of the gas inlet pipeline is communicated with a waste gas outlet of the impregnation machine; one end of the air outlet pipeline is communicated with the air outlet; one end of the protection pipeline is communicated with the air inlet pipeline and the connection area is a first area, the other end is communicated with the air outlet pipeline and the connection area is a second area, and a protection valve is arranged on the protection pipeline; the air inlet valve is located between the first area and the combustion chamber, and the air outlet valve is located between the second area and the combustion chamber. In the application, when the impregnation machine is cooled for shutdown maintenance, the air inlet valve and the air outlet valve are both closed, the protection valve is opened, cold air avoids the combustion chamber, the combustion chamber is effectively prevented from being damaged, and meanwhile, the impregnation machine can be normally cooled for shutdown maintenance.

Description

Technical Field

[0001] This application relates to the field of waste gas treatment technology, and in particular to a waste gas treatment system. Background Technology

[0002] Currently, most of the waste gas generated by the impregnation machine in the copper clad laminate industry is treated by combustion chamber, where the waste gas is incinerated.

[0003] However, the temperature inside the combustion chamber is relatively high, and most of them are castable refractory. Their properties are quite special and they cannot be subjected to extreme cold or heat. However, the impregnation machine used in conjunction with it needs to be cooled down and shut down for maintenance due to production needs. During the cooling process of the impregnation machine, cold air is drawn in for cooling. Its exhaust outlet will eventually produce cold air. If the cold air is introduced into the combustion chamber, it can easily damage the internal structure of the combustion chamber and thus affect the normal use of the combustion chamber. Utility Model Content

[0004] The main purpose of this application is to provide an exhaust gas treatment system that solves the problem that the combustion chamber cannot be extremely cold or hot, while the impregnation machine needs to be frequently cooled down and shut down for maintenance, resulting in an incompatibility between the two.

[0005] To achieve the above objectives, this application provides an exhaust gas treatment system for treating exhaust gas generated by an impregnation machine. The exhaust gas treatment system includes a combustion chamber, an inlet pipe, an outlet pipe, and a protection pipe. The combustion chamber has an inlet and an outlet. One end of the inlet pipe is connected to the inlet, and the other end is connected to the exhaust gas outlet of the impregnation machine. An inlet valve is installed on the inlet pipe. One end of the outlet pipe is connected to the outlet, and an outlet valve is installed on the outlet pipe. One end of the protection pipe is connected to the inlet pipe and connected to a first region, and the other end is connected to the outlet pipe and connected to a second region. A protection valve is installed on the protection pipe. The inlet valve is located between the first region and the combustion chamber, and the outlet valve is located between the second region and the combustion chamber.

[0006] Optionally, the exhaust gas treatment system further includes a vent valve, which is disposed on the exhaust pipe and located between the exhaust valve and the combustion chamber.

[0007] Optionally, the exhaust gas treatment system further includes an exhaust gas preheating chamber, which is disposed on the inlet pipe and the outlet pipe. The exhaust gas preheating chamber has a first chamber and a second chamber, with the second chamber located outside the first chamber. The first chamber is connected to the inlet pipe, and the second chamber is connected to the outlet pipe. On the inlet pipe, the exhaust gas preheating chamber is located on the side of the first region away from the combustion chamber, and on the outlet pipe, the exhaust gas preheating chamber is located on the side of the second region away from the combustion chamber.

[0008] Optionally, the exhaust gas treatment system further includes an intake branch, both ends of which are connected to the intake pipe and cross the exhaust gas preheating chamber, and a valve is provided on the intake branch; wherein, the intake branch is located on the side of the first region away from the combustion chamber.

[0009] Optionally, the exhaust gas treatment system further includes an exhaust branch, both ends of which are connected to the exhaust pipe and cross the exhaust gas preheating chamber. A heat transfer oil heat exchanger is provided on the exhaust branch. The exhaust branch is located on the side of the second region away from the combustion chamber.

[0010] Optionally, the connection area between the end of the exhaust branch located between the exhaust gas preheating chamber and the second region and the exhaust pipe is the third region; the exhaust gas treatment system further includes a proportional valve, which is located in the third region.

[0011] Optionally, the combustion chamber includes an outer wall, and a first combustion chamber, a second combustion chamber, and a third combustion chamber are sequentially connected in a first direction inside the outer wall; wherein, the air inlet and the air outlet are both disposed on the outer wall, the air inlet is connected to the first combustion chamber, and the air outlet is connected to the third combustion chamber.

[0012] Optionally, the combustion chamber further includes a baffle and a retaining wall. The baffle is disposed inside the first combustion chamber and divides the first combustion chamber into a third chamber and a fourth chamber. The baffle is provided with a through groove to connect the third chamber and the fourth chamber. The fourth chamber is located between the third chamber and the second combustion chamber. The third chamber is connected to the air inlet. The retaining wall is fixed inside the third chamber and divides the third chamber into a first chamber and a second chamber. The first chamber and the second chamber are connected by a gap between the retaining wall and the outer wall. The through groove is located in the second chamber, and the air inlet is located in the first chamber.

[0013] Optionally, the intercepting wall is provided with multiple through holes to connect the first chamber and the second chamber.

[0014] Optionally, the multiple through holes are divided into multiple hole groups, and the through holes in different hole groups have different shapes and sizes, while the through holes in the same hole group have the same shape and size.

[0015] The waste gas treatment system proposed in this application embodiment has the following characteristics: When the impregnation machine is working normally, both the inlet valve and the outlet valve are open, and the protection valve is closed. The waste gas flows from the waste gas outlet of the impregnation machine through the inlet pipe and reaches the combustion chamber for combustion treatment. The flue gas after combustion flows through the outlet pipe to the subsequent steps. When the impregnation machine is cooled down for maintenance, both the inlet valve and the outlet valve are closed, and the protection valve is open. The cold air flows through the inlet pipe and the protection pipe and finally reaches the outlet pipe, avoiding the combustion chamber along the way. The combustion chamber forms an independent cavity and maintains a basically constant temperature, effectively preventing the combustion chamber from being damaged. At the same time, the impregnation machine can be cooled down and shut down for maintenance normally. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a waste gas treatment system proposed in an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of the combustion chamber structure in an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the combustion internal cross-sectional structure in an embodiment of this application. Figure 1 ;

[0019] Figure 4 This is a schematic diagram of the combustion internal cross-sectional structure in an embodiment of this application. Figure 2 .

[0020] In the diagram: 1. Combustion chamber; 11. Air inlet; 12. Air outlet; 2. Air inlet pipe; 21. Air inlet valve; 3. Air outlet pipe; 31. Air outlet valve; 32. Vent valve; 4. Protection pipe; 41. Protection valve; 5. Exhaust gas preheating chamber; 6. Air inlet branch; 61. Valve; 7. Air outlet branch; 71. Heat transfer oil heat exchanger; 8. Proportional valve; 100. External wall; 110. First combustion chamber; 111. Baffle; 1111. Through groove; 112. Retaining wall; 1121. Through hole; 120. Second combustion chamber; 130. Third combustion chamber.

[0021] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixation" should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] refer to Figures 1-4 This application provides an exhaust gas treatment system for treating exhaust gas generated by an impregnation machine. The exhaust gas treatment system may include a combustion chamber 1, an inlet pipe 2, an outlet pipe 3, and a protection pipe 4. The combustion chamber 1 has an inlet 11 and an outlet 12. One end of the inlet pipe 2 is connected to the inlet 11, and the other end is connected to the exhaust gas outlet of the impregnation machine. An inlet valve 21 is provided on the inlet pipe 2. One end of the outlet pipe 3 is connected to the outlet 12, and an outlet valve 31 is provided on the outlet pipe 3. One end of the protection pipe 4 is connected to the inlet pipe 2 and the connected area is a first area. The other end is connected to the outlet pipe 3 and the connected area is a second area. A protection valve 41 is provided on the protection pipe 4. The inlet valve 21 is located between the first area and the combustion chamber 1, and the outlet valve 31 is located between the second area and the combustion chamber 1.

[0027] The waste gas treatment system proposed in this application embodiment has the following characteristics: When the impregnation machine is working normally, both the inlet valve 21 and the outlet valve 31 are open, and the protection valve 41 is closed. The waste gas flows from the waste gas outlet of the impregnation machine through the inlet pipe 2 and reaches the combustion chamber 1 for combustion treatment. The flue gas after combustion flows through the outlet pipe 3 to the subsequent steps. When the impregnation machine is cooled down for maintenance, both the inlet valve 21 and the outlet valve 31 are closed, and the protection valve 41 is open. The cold air flows through the inlet pipe 2 and the protection pipe 4 and finally reaches the outlet pipe 3, avoiding the combustion chamber 1 along the way. The combustion chamber 1 forms an independent cavity and maintains a basically constant temperature, effectively preventing the combustion chamber 1 from being damaged. At the same time, the impregnation machine can be cooled down and shut down for maintenance normally.

[0028] Among them, the air inlet valve 21, the air outlet valve 31, and the protection valve 41 can all be common electric valves, such as electric ball valves.

[0029] refer to Figure 1 In an exemplary embodiment, the exhaust gas treatment system may further include a vent valve 32, which is disposed on the exhaust pipe 3 and located between the exhaust valve 31 and the combustion chamber 1.

[0030] Specifically, when the impregnation machine is cooled down, the combustion chamber 1 is isolated. Opening the vent valve 32 can effectively release the internal pressure of the combustion chamber 1, prevent the internal temperature of the combustion chamber 1 from becoming too high, and ensure that the combustion chamber 1 will not be damaged by extreme heat.

[0031] refer to Figure 1 In an exemplary embodiment, the exhaust gas treatment system may further include an exhaust gas preheating chamber 5, which is disposed on the intake pipe 2 and the exhaust pipe 3. The exhaust gas preheating chamber 5 has a first chamber and a second chamber, with the second chamber located outside the first chamber. The first chamber is connected to the intake pipe 2, and the second chamber is connected to the exhaust pipe 3. On the intake pipe 2, the exhaust gas preheating chamber 5 is located on the side of the first region away from the combustion chamber 1, and on the exhaust pipe 3, the exhaust gas preheating chamber 5 is located on the side of the second region away from the combustion chamber 1.

[0032] Specifically, after adding the exhaust gas preheating chamber 5, the exhaust gas discharged from the impregnation machine will first pass through the first chamber of the exhaust gas preheating chamber 5, and the flue gas after combustion will pass through the second chamber of the exhaust gas preheating chamber 5. This allows the high-temperature flue gas after combustion to heat the exhaust gas in the first chamber, so that the exhaust gas is preheated before entering the combustion chamber, which facilitates subsequent combustion.

[0033] refer to Figure 1 In an exemplary embodiment, the exhaust gas treatment system may further include an intake branch 6, both ends of which are connected to the intake pipe 2 and cross the exhaust gas preheating chamber 5. A valve 61 is provided on the intake branch 6. The intake branch 6 is located on the side of the first region away from the combustion chamber 1.

[0034] With the addition of the intake branch 6, the connection of the intake branch 6 can be adjusted by switching valve 61. If the temperature of the preheated flue gas is too high, valve 61 can be opened to connect the intake branch 6. In this way, on the intake pipe 2, some exhaust gas does not pass through the exhaust gas preheating chamber 5 and directly reaches the exhaust gas preheating chamber 5 and the first area to mix with the preheated exhaust gas, thereby controlling the temperature of the preheated exhaust gas and preventing the preheated exhaust gas temperature from being too high and prematurely cracking in the intake pipe 2, affecting subsequent combustion.

[0035] Valve 61 can also be a proportional valve to adjust the ratio of waste gas mixing.

[0036] It should be understood that on the intake pipe 2, the area between the exhaust gas preheating chamber 5 and the first area, which is connected to the intake branch 6, is the fourth area. A first temperature sensor can be installed between the exhaust gas preheating chamber 5 and the fourth area to detect the temperature of the preheated exhaust gas; and a second temperature sensor can be installed between the fourth area and the first area to detect the temperature of the unpreheated exhaust gas and the preheated exhaust gas after neutralization. When the first temperature sensor detects that the temperature of the preheated exhaust gas is high, valve 61 is opened so that the temperature detected by the second temperature sensor meets the required range.

[0037] refer to Figure 1 In an exemplary embodiment, the exhaust gas treatment system may further include an exhaust branch 7, both ends of which are connected to the exhaust pipe 3 and cross the exhaust gas preheating chamber 5. A heat transfer oil heat exchanger 71 is provided on the exhaust branch 7. The exhaust branch 7 is located on the side of the second region away from the combustion chamber 1.

[0038] Specifically, heat transfer oil is required during the operation of the impregnation machine. Adding a heat transfer oil heat exchanger 71 to the gas outlet branch 7 can effectively utilize the high-temperature flue gas after combustion to heat the heat transfer oil, which facilitates the use of the impregnation machine.

[0039] refer to Figure 1 In an exemplary embodiment, the connection area between the end of the exhaust branch 7 located between the exhaust gas preheating chamber 5 and the second region and the exhaust pipe 3 is the third region; the exhaust gas treatment system may also include a proportional valve 8, which is located in the third region.

[0040] In particular, on the exhaust pipe 3, the ratio of high-temperature flue gas entering the exhaust gas preheating chamber 5 and the heat transfer oil heat exchanger 71 is adjusted by the proportional valve 8. This allows for the scientific distribution of heat according to the actual operating conditions of the impregnation machine, thereby improving the heat exchange efficiency of the exhaust gas preheating chamber 5 and the heat transfer oil heat exchanger 71, and improving the overall heat utilization efficiency of the system. At the same time, the flow rate of high-temperature flue gas flowing into the exhaust gas preheating chamber 5 can be reduced or increased based on the temperature detected by the first sensor.

[0041] refer to Figure 3 and Figure 4In an exemplary embodiment, the combustion chamber 1 may include an outer wall 100, and a first combustion chamber 110, a second combustion chamber 120 and a third combustion chamber 130 are disposed inside the outer wall 100 in a first direction and are connected sequentially. The air inlet 11 and the air outlet 12 are both disposed on the outer wall 100, the air inlet 11 is connected to the first combustion chamber 110 and the air outlet 12 is connected to the third combustion chamber 130.

[0042] Specifically, the exhaust gas enters the first combustion chamber 110 through the air inlet 11 for combustion, and then reaches the second combustion chamber 120 and the third combustion chamber 130 for combustion, resulting in better exhaust gas treatment.

[0043] refer to Figure 3 and Figure 4 In an exemplary embodiment, the combustion chamber 1 may further include a baffle 111 and a retaining wall 112. The baffle 111 is disposed in the first combustion chamber 110 and divides the first combustion chamber 110 into a third chamber and a fourth chamber. A through groove 1111 is provided on the baffle 111 to connect the third chamber and the fourth chamber. The fourth chamber is located between the third chamber and the second combustion chamber 120. The third chamber is connected to the air inlet 11. The retaining wall 112 is fixed in the third chamber and divides the third chamber into a first chamber and a second chamber. The first chamber and the second chamber are connected by the gap between the retaining wall 112 and the outer wall 100. The through groove 1111 is located in the second chamber, and the air inlet 11 is located in the first chamber.

[0044] When the exhaust gas enters the air inlet 11 and reaches the first chamber, it cannot pass directly through the through channel 1111. It needs to bypass the intercepting wall 112 to reach the second chamber before it can enter the second chamber and pass through the through channel 1111. This effectively increases the residence time of the exhaust gas in the first combustion chamber 110, resulting in a higher combustion temperature of the exhaust gas in the first combustion chamber 110.

[0045] In a traditional combustion chamber, exhaust gases accumulate rapidly at the top of the chamber due to the balloon effect. This prevents some of the reactions that should occur in the first combustion chamber from taking place, thus preventing the temperature of the first combustion chamber from rising. Consequently, the exhaust gases cannot be effectively heated, leading to an increase in escape molecules throughout the combustion chamber and abnormal emissions.

[0046] refer to Figure 4 In an exemplary embodiment, the retaining wall 112 is provided with a plurality of through holes 1121 to connect the first chamber and the second chamber.

[0047] With the through hole 1121 opened on the intercepting wall 112, the exhaust gas entering the first chamber will be divided into two parts. The first part bypasses the intercepting wall 112 and reaches the second chamber, while the second part passes through the through hole 1121 and reaches the second chamber. In this way, in the second chamber, the first part of exhaust gas will rub against the second part of exhaust gas, increasing the reaction probability of exhaust gas molecules. The temperature in the first combustion chamber 110 is effectively increased, which can then heat the subsequent exhaust gas, making the subsequent exhaust gas reaction more effective and reducing emissions.

[0048] Furthermore, the multiple through holes 1121 are divided into multiple hole groups. The shape and size of the through holes 1121 in different hole groups are different, while the shape and size of the through holes 1121 in the same hole group are the same. The exhaust gas flow rate is different in the through holes 1121 of different sizes. In this way, the second part of the exhaust gas will also generate friction with each other, further increasing the probability of exhaust gas molecule reaction, thereby increasing the temperature inside the first combustion chamber 110.

[0049] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A waste gas treatment system, characterized in that, The waste gas treatment system for treating waste gas generated by the impregnation machine includes: The combustion chamber (1) has an air inlet (11) and an air outlet (12); An air inlet pipe (2) is connected at one end to the air inlet (11) and at the other end to the exhaust outlet of the impregnation machine. An air inlet valve (21) is provided on the air inlet pipe (2). An air outlet pipe (3) is connected at one end to the air outlet (12), and an air outlet valve (31) is provided on the air outlet pipe (3); The protective pipeline (4) is connected at one end to the air inlet pipeline (2) and the connection area is the first area, and at the other end to the air outlet pipeline (3) and the connection area is the second area. A protective valve (41) is provided on the protective pipeline (4). The intake valve (21) is located between the first region and the combustion chamber (1), and the exhaust valve (31) is located between the second region and the combustion chamber (1).

2. The waste gas treatment system as described in claim 1, characterized in that, The waste gas treatment system also includes: An exhaust valve (32) is installed on the exhaust pipe (3) and located between the exhaust valve (31) and the combustion chamber (1).

3. The waste gas treatment system as described in claim 1, characterized in that, The waste gas treatment system also includes: The exhaust gas preheating chamber (5) is provided on the inlet pipe (2) and the outlet pipe (3). The exhaust gas preheating chamber (5) has a first chamber and a second chamber, and the second chamber is located outside the first chamber. The first chamber is connected to the air inlet pipe (2), and the second chamber is connected to the air outlet pipe (3). On the intake pipe (2), the exhaust gas preheating chamber (5) is located on the side of the first region away from the combustion chamber (1), and on the exhaust pipe (3), the exhaust gas preheating chamber (5) is located on the side of the second region away from the combustion chamber (1).

4. The waste gas treatment system as described in claim 3, characterized in that, The waste gas treatment system also includes: The intake branch (6) is connected to the intake pipe (2) at both ends and crosses the exhaust gas preheating chamber (5). A valve (61) is provided on the intake branch (6). The intake branch (6) is located on the side of the first region away from the combustion chamber (1).

5. The waste gas treatment system as described in claim 3, characterized in that, The waste gas treatment system also includes: The exhaust branch (7) is connected to the exhaust pipe (3) at both ends and crosses the exhaust gas preheating chamber (5). A heat transfer oil heat exchanger (71) is installed on the exhaust branch (7). The exhaust branch (7) is located on the side of the second region away from the combustion chamber (1).

6. The waste gas treatment system as described in claim 5, characterized in that, The connection area between the outlet branch (7) located between the exhaust gas preheating chamber (5) and the second region and the outlet pipe (3) is the third region; the exhaust gas treatment system further includes: A proportional valve (8) is provided in the third region.

7. The waste gas treatment system as described in claim 1, characterized in that, The combustion chamber (1) includes: The exterior wall (100) is provided with a first combustion chamber (110), a second combustion chamber (120) and a third combustion chamber (130) connected sequentially in a first direction; The air inlet (11) and the air outlet (12) are both located on the outer wall (100). The air inlet (11) is connected to the first combustion chamber (110), and the air outlet (12) is connected to the third combustion chamber (130).

8. The waste gas treatment system as described in claim 7, characterized in that, The combustion chamber (1) further includes: A baffle (111) is disposed in the first combustion chamber (110) and divides the first combustion chamber (110) into a third chamber and a fourth chamber. A through groove (1111) is provided on the baffle (111) to connect the third chamber and the fourth chamber. The fourth chamber is located between the third chamber and the second combustion chamber (120). The third chamber is connected to the air inlet (11). A retaining wall (112) is fixed in the third chamber and divides the third chamber into a first chamber and a second chamber. The first chamber and the second chamber are connected by a gap between the retaining wall (112) and the outer wall (100). The through groove (1111) is located in the second chamber, and the air inlet (11) is located in the first chamber.

9. The waste gas treatment system as described in claim 8, characterized in that, The intercepting wall (112) is provided with a plurality of through holes (1121) to connect the first chamber and the second chamber.

10. The waste gas treatment system as described in claim 9, characterized in that, The multiple through holes (1121) are divided into multiple hole groups. The through holes (1121) in different hole groups have different shapes and sizes, while the through holes (1121) in the same hole group have the same shape and size.

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