Waste gas treatment system

Abstract

The utility model relates to a waste gas treatment system. The waste gas treatment system comprises a gas collecting hood, a gas storage device and a purification device, wherein the gas collecting hood is used for collecting waste gas; the purification device and the gas storage device are respectively connected with the gas collecting hood, the purification device is used for purifying waste gas in the gas collecting hood, and the gas storage device can distribute and store the waste gas in the gas collecting hood, so that the gas collecting hood is kept in a negative pressure state. The waste gas treatment system provided by the utility model is good in gas collection and purification effects.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, and more specifically, to a waste gas treatment system. Background Art

[0002] In some production processes, production equipment usually produces oil mist exhaust gas, which is easy to pollute the workshop environment. In the prior art, these oil mist exhaust gases are usually collected by gas collecting hoods and then purified by purifiers. In some processes, such as the demolding process of the die-casting process, a large amount of oil mist exhaust gas with high concentration but short duration will be generated. The existing gas collecting hood has a limited volume, which easily leads to a large amount of oil mist that cannot be completely collected, causing the exhaust gas to overflow and pollute the workshop environment, while also reducing the purification effect of the purifier. Utility Model Content

[0003] One object of the utility model is to provide an exhaust gas treatment system.

[0004] According to one aspect of the utility model, there is provided an exhaust gas treatment system, comprising:

[0005] A gas collecting hood, a gas storage device and a purification device, wherein the gas collecting hood is used to capture exhaust gas;

[0006] The purification device and the gas storage device are respectively connected to the gas collecting hood. The purification device is used to purify the exhaust gas in the gas collecting hood. The gas storage device can divert and store the exhaust gas in the gas collecting hood to keep the gas collecting hood in a negative pressure state.

[0007] Optionally, the gas storage device includes a gas storage component and a power component, and the gas storage component is connected to the gas collecting hood;

[0008] The power assembly can make the exhaust gas in the air collecting hood flow toward the air storage assembly, and can also make the exhaust gas in the air storage assembly flow toward the air collecting hood.

[0009] Optionally, the air storage component includes an air storage hood, and the power component can compress or stretch the air storage hood to allow the exhaust gas in the air collecting hood and the air storage hood to flow mutually.

[0010] Optionally, the gas storage assembly further comprises a first bracket, and the power assembly comprises a driving member and a transmission member;

[0011] The first bracket is fixed on the air collecting hood, the air storage hood and the driving member are arranged on the first bracket, and the driving member is connected to the air storage hood through the transmission member.

[0012] Optionally, the air storage hood comprises a base, a movable partition and a retractable cloth;

[0013] The base is fixed to the bottom of the first bracket, the movable partition is movably arranged on the first bracket and is located above the base, the telescopic cloth is sealed and connected between the base and the movable partition, and the driving member is connected to the movable partition through the transmission member.

[0014] Optionally, the transmission member includes a lead screw and a moving ring;

[0015] The moving ring is arranged at the center of the moving partition, and the internal thread of the moving ring is meshed with the external thread of the lead screw;

[0016] The driving member can drive the lead screw to rotate, and move the movable partition up and down through the movable ring to compress or stretch the telescopic cloth.

[0017] Optionally, the first bracket includes four support rods and protective covers fixed to the top ends of the support rods, the movable partition is arranged on the four support rods through a slip ring, and the driving member is fixed to the protective cover through a second bracket.

[0018] Optionally, the second bracket includes a first support plate, a second support plate, a first positioning ring, a second positioning ring, a clamping plate and a connecting plate, the transmission member also includes a driving wheel, a belt and a driven wheel, and the driving member is a motor;

[0019] The first support plate and the second support plate are respectively fixed on the protective cover and connected to each other through the connecting plate, the first positioning ring and the second positioning ring are fixed on the second support plate in sequence, and the first support plate is L-shaped;

[0020] The motor is arranged on the first support plate and fixed by the clamping plate, the lead screw is passed through the first positioning ring and the second positioning ring, the driving wheel is assembled on the output end of the motor, the driven wheel is assembled on the lead screw, and the driving wheel and the driven wheel are connected by the belt transmission.

[0021] Optionally, the gas storage assembly includes a first valve, a second valve and a gas storage cover, and the gas storage cover is connected to the gas collecting cover through the first valve and the second valve;

[0022] When the exhaust gas in the air collecting hood flows toward the air storage hood, the first valve is in an open state, and when the exhaust gas in the air storage hood flows toward the air collecting hood, the second valve is in an open state.

[0023] Optionally, it further comprises: a support base, on which the gas collecting hood and the purification device are both arranged;

[0024] The gas collecting hood comprises a movable part and a fixed part which can be opened and closed with each other, the gas collecting hood is connected with the fixed part through a pipeline, and the movable part is communicated with the purification device.

[0025] One technical effect of the utility model is that, by connecting the gas storage device to the gas collection hood, when the exhaust gas volume is large, the exhaust gas in the gas collection hood can be diverted and temporarily stored in the gas storage device, thereby improving the exhaust gas collection capacity of the gas collection hood and reducing the risk of exhaust gas overflow. At the same time, the gas storage device can also reduce the purification volume of the purification device and improve the purification effect.

[0026] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0028] Figure 1 It is a structural schematic diagram of an exhaust gas treatment system provided by the utility model.

[0029] Figure 2 The utility model is a structural schematic diagram of a gas storage device provided by the utility model.

[0030] Figure 3 yes Figure 2 A cross-sectional view of the air storage device taken at AA is provided.

[0031] Figure 4 It is a structural schematic diagram of a power component provided by the utility model.

[0032] Figure 5 yes Figure 4 Bottom view of the power assembly is provided.

[0033] Figure 6 It is a schematic diagram of a gas storage device provided by the utility model in a zero gas storage state.

[0034] Figure 7 The utility model is a schematic diagram of an air storage device in an air intake state.

[0035] Figure 8 The utility model is a schematic diagram of a gas storage device provided by the utility model in a full gas state.

[0036] Fig. 9 The utility model is a schematic diagram of an air storage device in a deflated state.

[0037] Description of reference numerals:

[0038] 1. Leg; 2. Long connecting rod; 3. Short connecting rod; 4. Gas collecting hood; 401. Fixed part; 402. Moving part; 5. Purification device; 6. Pipeline; 7. First valve; 8. Second valve; 9. Gas storage device; 901. Protective cover; 902. Screw; 903. Moving ring; 904. Support rod; 905. Telescopic cloth; 906. Moving partition; 907. Driving wheel; 908. Driven wheel; 909. Motor; 910. Base; 911. First support plate; 912. Second support plate; 913. Connecting plate; 914. First positioning ring; 915. Second positioning ring; 916. Clamp; 917. Belt; 10. Support seat. DETAILED DESCRIPTION

[0039] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0040] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0041] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0042] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0043] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0044] like Figures 1 to 5 As shown, according to one aspect of the utility model, there is provided an exhaust gas treatment system, including: an air collecting hood 4, an air storage device 9 and a purification device 5, the air collecting hood 4 is used to capture exhaust gas; the purification device 5 and the air storage device 9 are respectively connected to the air collecting hood 4, the purification device 5 is used to purify the exhaust gas in the air collecting hood 4, and the air storage device 9 can divert and store the exhaust gas in the air collecting hood 4 to keep the air collecting hood 4 in a negative pressure state.

[0045] Specifically, the waste gas treatment system provided by the present application can be applied to the collection and treatment of equipment that can instantly generate a large amount of high-concentration waste gas, such as die-casting machines, etc. In practical applications, the waste gas generated in ordinary processes can be directly collected by the gas hood 4 and then directly sucked and treated by the purification device 5. When the amount of waste gas generated in a certain process is large, the waste gas in the gas hood 4 can be diverted and temporarily stored by the gas storage device 9, so that the amount of waste gas in the gas hood 4 can be reduced in time, and a negative pressure environment can be achieved in the gas hood 4. The negative pressure environment in the gas hood 4 is conducive to its timely capture of waste gas in the environment, avoiding waste gas overflow, improving the gas collection effect of the waste gas treatment system, and reducing environmental pollution.

[0046] In addition, the purification device 5 can adopt an electrostatic purifier or a filtering purifier. When the gas storage device 9 timely diverts the exhaust gas in the gas collecting hood 4, the reduction of the exhaust gas volume can also effectively control the exhaust gas concentration in the gas collecting hood 4, avoiding the phenomenon of excessive purification load caused by the instantaneous increase of the exhaust gas concentration. When an electrostatic purifier is used, the instantaneous concentration of the purifier is too high, which may cause corona occlusion, and a large amount of exhaust gas is discharged without purification, which will further deteriorate the environment. Therefore, the setting of the gas storage device 9 can also improve the purification effect and reliability of the purification device 5.

[0047] In the above embodiment, since the exhaust gas usually drifts upward due to the high heat after being generated, the air collecting hood 4 is usually clamped on the upper part of the position where the equipment generates the exhaust gas through a support frame, and a part of the equipment can be extended into the air collecting hood 4 to improve the exhaust gas capture effect of the air collecting hood 4. The purification device 5 is usually directly connected to the air collecting hood 4, and the exhaust gas in the air collecting hood 4 is extracted to purify it. In addition, the air storage device 9 can be set above the air collecting hood 4 to facilitate the diversion of the exhaust gas in the air collecting hood 4. The diversion of the exhaust gas by the air collecting hood 4 can be achieved by power equipment such as fans and motors 909, and the air storage can be achieved by structures such as air storage bags, and the utility model does not limit this.

[0048] The exhaust gas treatment system provided in the above embodiment is suitable for the treatment of paroxysmal exhaust gas. For example, in the process of casting quenching, the amount of oil fume generated is very small most of the time, but a large amount of oil fume is generated at the moment when the workpiece enters the quenching oil. If conventional methods are used to treat these oil fume exhaust gases, a large purifier needs to be built. If the exhaust gas treatment system provided by the utility model is used, not only a smaller purification device can be selected to reduce the initial investment, but also the operating energy consumption can be reduced and the operating cost can be reduced.

[0049] Alternatively, if Figure 1 to Figure 2 As shown, the air storage device 9 includes an air storage component and a power component. The air storage component is connected to the air collecting hood 4; the power component can make the exhaust gas in the air collecting hood 4 flow to the air storage component, and make the exhaust gas in the air storage component flow to the air collecting hood 4.

[0050] Specifically, in this embodiment, the gas storage assembly is used to store the waste gas diverted from the gas collecting hood 4, and the power assembly is used to divert the waste gas to the gas storage assembly. In addition, the power assembly can also allow the waste gas in the gas storage assembly to slowly flow back into the gas collecting hood 4, so that it can be drawn away and purified by the purification device 5 by flowing back into the gas collecting hood 4. The purification process in which the waste gas in the gas storage assembly flows back into the gas collecting hood 4 and is drawn away by the purification device 5 can be performed after there is less waste gas in the gas collecting hood 4 or the instantaneous gas production process is completed, so as to improve the waste gas treatment efficiency.

[0051] Alternatively, if Figure 1 to Figure 2 As shown, the air storage assembly includes an air storage cover, and the power assembly can compress or stretch the air storage cover to allow the exhaust gas in the air collecting cover 4 and the air storage cover to flow mutually.

[0052] Specifically, in this embodiment, the gas storage component stores the diverted exhaust gas through the gas storage cover, and the air intake and exhaust of the gas storage cover are achieved by compressing or stretching the gas storage cover by the power component, so that when the exhaust gas in the gas collection cover 4 needs to be diverted again, the volume of the gas storage cover can be increased as the power component is stretched, avoiding the gas storage in the gas storage cover being limited by volume and affecting the diversion effect. In addition, when the gas in the gas storage cover needs to be released, the exhaust gas in the gas storage cover can be completely released by compressing the gas storage cover to avoid residual exhaust gas.

[0053] Alternatively, if Figure 1 to Figure 2 As shown, the air storage assembly also includes a first bracket, and the power assembly includes a driving member and a transmission member; the first bracket is fixed to the air collecting hood 4, the air storage hood and the driving member are arranged on the first bracket, and the driving member is connected to the air storage hood through the transmission member.

[0054] Specifically, in this embodiment, the air storage hood is fixedly assembled above the air collection hood 4 through the first bracket, which can provide support and installation positions for the air storage hood and the power assembly, and facilitate the compression and stretching of the power assembly dynamic air storage hood. In addition, the first bracket can be set to a specific shape to provide a certain compression and stretching space for the air storage hood, so as to avoid the air storage hood being disturbed by the external environment during the stretching or compression process. The setting of the transmission member facilitates the connection between the driving member and the air collection hood 4.

[0055] Alternatively, if Figure 1 to Figure 2 As shown, the air storage hood includes a base 910, a movable partition 906 and a retractable cloth 905; the base 910 is fixed to the bottom of the first bracket, the movable partition 906 is movably arranged on the first bracket and is located above the base 910, the retractable cloth 905 is sealed between the base 910 and the movable partition 906, and the driving member is connected to the movable partition 906 through a transmission member.

[0056] Specifically, in this embodiment, the gas collecting hood 4 is formed by connecting the telescopic cloth 905 between the base 910 and the movable partition 906, and the movable partition 906 is connected to the driving member through a transmission member, so that the movable partition 906 can move up and down. In the process of moving up and down, the internal space of the gas storage hood is compressed or stretched, thereby achieving the purpose of air intake or air discharge. Among them, the air intake process can realize the diversion of the exhaust gas in the gas collecting hood 4 to keep it in a negative pressure state, and the air discharge can make the exhaust gas return to the gas collecting hood 4, which is convenient for the purification device 5 to perform purification treatment.

[0057] In the above embodiment, the telescopic cloth 905 can be made of PVC or PE material, and a thin steel wire can be set inside the telescopic cloth 905 as a reinforcing keel to increase the service life of the telescopic cloth 905. In practical applications, the seal between the telescopic cloth 905 and the movable partition 906 and between the telescopic cloth 905 and the base 910 is very important. The telescopic cloth 905 is repeatedly stretched and retracted, which is easy to be bonded and cracked, causing the seal to be damaged. During production, after one end of the telescopic cloth 905 is pasted, it can be compacted with a pressing plate and tightened with a nut to improve the sealing performance of the air storage cover.

[0058] Alternatively, if Figure 1 to Figure 2 As shown, the transmission member includes a lead screw 902 and a moving ring 903; the moving ring 903 is arranged at the center position of the moving baffle 906, and the internal thread of the moving ring 903 is engaged with the external thread of the lead screw 902; the driving member can drive the lead screw 902 to rotate, and move the moving baffle 906 up and down through the moving ring 903 to compress or stretch the telescopic cloth 905.

[0059] Specifically, in this embodiment, a moving ring 903 is arranged at the center of the moving baffle 906, and the moving ring 903 has an internal thread. After the lead screw 902 is engaged with the moving ring 903 through the external thread, it rotates under the drive of the driving member, thereby driving the moving baffle 906 to move up and down, thereby achieving the stretching and compression of the air storage cover. The arrangement of the lead screw 902 allows the rotation of the driving member to be converted into the up and down movement of the moving ring 903, simplifying the structure and transmission form of the transmission member. The arrangement of the moving ring 903 facilitates the driving member to drive the moving baffle 906 to move.

[0060] Alternatively, if Figure 1 to Figure 2 As shown, the first bracket includes four support rods 904 and a protective cover 901 fixed to the top of the support rods 904, the movable partition 906 is set on the four support rods 904 through a slip ring, and the driving member is fixed to the protective cover 901 through the second bracket.

[0061] Specifically, in this embodiment, the four support rods 904 of the first bracket play a role in supporting the entire gas storage device 9, and the provision of the protective cover 901 can play a certain protective role for the gas storage cover, and also provide support for the assembly of the driving member. The four corners of the movable partition 906 are respectively movably assembled on the four support rods 904 through four slip rings, so as to facilitate the upward and downward movement of the movable partition 906.

[0062] Alternatively, if Figure 4 and Figure 5 As shown, the second bracket includes a first support plate 911, a second support plate 901, a first positioning ring 914, a second positioning ring 915, a clamping plate 916 and a connecting plate 913, the transmission member also includes a driving wheel 907, a belt 917 and a driven wheel 908, and the driving member is a motor 909; the first support plate 911 and the second support plate 901 are respectively fixed on the protective cover 901 and are connected to each other through the connecting plate 913, the first positioning ring 914 and the second positioning ring 915 are fixed on the second support plate 901 in sequence, and the first support plate 911 is L-shaped; the motor 909 is arranged on the first support plate 911 and fixed by the clamping plate 916, the lead screw 902 is inserted into the first positioning ring 914 and the second positioning ring 915, the driving wheel 907 is assembled on the output end of the motor 909, the driven wheel 908 is assembled on the lead screw 902, and the driving wheel 907 and the driven wheel 908 are connected by the belt 917.

[0063] Specifically, in this embodiment, the first support plate 911 and the second support plate 901 are fixed on the protective cover 901 to provide support for the entire power assembly. In order to make the fixation more firm and prevent the assembly from shaking during operation, the first support plate 911 and the second support plate 901 are connected by a connecting plate 913 to play a reinforcing role. The first support plate 911 is L-shaped, and the motor 909 is placed on the first support plate 911, and the motor 909 is fixed by a clamping plate 916. The driving wheel 907 on the motor 909 and the driven wheel 908 on the lead screw 902 are driven by a belt 917.

[0064] In order to prevent the lead screw 902 from shaking, the first positioning ring 914 and the second positioning ring 915 are used to position the lead screw 902. The motor 909 drives the lead screw 902 to rotate in the above manner, and the rotation of the lead screw 902 causes the movable partition 906 to move up and down. The speed of the movable partition 906 is changed by adjusting the rotation speed of the motor 909. Through the above combination, the entire movement process is guaranteed to run smoothly and with low noise. Even if the lead screw 902 is stuck due to some fault, the motor 909 will not burn out, thereby improving the safety of the equipment.

[0065] Alternatively, if Figure 1 to Figure 2As shown, the air storage assembly includes a first valve 7, a second valve 8 and an air storage hood, and the air storage hood is connected to the air collecting hood 4 through the first valve 7 and the second valve 8; when the exhaust gas in the air collecting hood 4 flows toward the air storage hood, the first valve 7 is in an open state, and when the exhaust gas in the air storage hood flows toward the air collecting hood 4, the second valve 8 is in an open state.

[0066] Specifically, in this embodiment, the design of the first valve 7 and the second valve 8 can assist in the process of air intake and air discharge of the air storage component by controlling the opening and closing of the valves. The first valve 7 and the second valve 8 can use electric valves to achieve automatic control of the equipment.

[0067] The following provides a process of collecting and purifying the waste gas generated during the operation of the die-casting machine by the waste gas treatment system of the present application. During the spraying of the release agent, a large amount of oil mist is generated. Due to the high temperature in the mold, the gas volatilized by the release agent will be higher than the temperature of the surrounding air. Most of the small particles of oil mist and smoke will drift upwards. Therefore, the die-casting machine release agent nozzle is located below the gas collection hood 4.

[0068] In this process, the gas storage component (gas storage hood) has four states, namely, zero gas storage state (state 1), fast air intake state (state 2), full gas storage state (state 3) and slow gas release state (state 4). The working processes of the exhaust gas treatment system in the above states are as follows:

[0069] State 1: The zero air storage state is the state when the air storage hood has not yet stored air. At this time, the telescopic cloth 905 is extremely compressed and the volume of the air storage hood is almost zero. Figure 6 .

[0070] State 2: The rapid air suction state is the process in which the air storage hood rapidly inhales air, and a large amount of oil mist exhaust gas is sucked into the air storage hood. At this time, the first valve 7 is open and the second valve 8 is closed. The air outlet below the first valve 7 is closer to the release agent spraying position, which is also the position with the highest oil mist concentration. In this way, a large amount of high-concentration oil mist is sucked into the air storage hood. Figure 7 .

[0071] On the one hand, a large amount of oil mist exhaust gas is sucked into the air storage hood, which reduces the exhaust gas purification capacity of the purification device 5, increases the negative pressure in the air collection hood 4, and greatly reduces the exhaust gas overflow, thereby improving the workshop environment. On the other hand, as a large amount of high-concentration oil mist exhaust gas is sucked into the air storage hood, the exhaust gas concentration purified by the purification device 5 is greatly reduced, avoiding the phenomenon of excessive purification load due to the instantaneous increase in exhaust gas concentration. In particular, when an electrostatic purifier is used, the instantaneous concentration of the purifier is too high, which may cause corona occlusion, and a large amount of exhaust gas is discharged without purification, which will further deteriorate the workshop environment. Therefore, the air storage device 9 is more important under this working condition.

[0072] In the above process, the time of the rapid air intake state is related to the working condition of the die-casting machine. Generally, the spraying time of the mold release agent of the die-casting machine is 3-5 seconds, so the duration of the rapid air intake state is generally 3-5 seconds.

[0073] State 3: Full gas state is the state where the gas storage hood is full of gas. At this time, the telescopic cloth 905 is stretched, the volume of the gas storage hood is the largest, and the waste gas fills the entire gas storage hood. The full state usually lasts for a short time, usually about 3 seconds, which is the duration after the release agent spraying is completed. At this time, the first valve 7 and the second valve 8 are both in the closed state. Figure 8 .

[0074] State 4: The slow release state is the process in which the gas in the gas storage hood is slowly released into the gas collection hood 4. After the release agent is sprayed, the amount of oil mist waste gas generated will decrease quickly, and the load of the purification device 5 will be reduced. At this time, the waste gas in the gas storage hood is slowly released and purified by the purification device 5. Generally, a die casting cycle is 20-30 seconds, and the waste gas slow release time is generally more than ten seconds. At this time, the first valve 7 is closed and the second valve 8 is opened. Fig. 9 .

[0075] The gas storage component can avoid the problems of instantaneous increase in oil mist concentration, excessive exhaust gas generation, and overload operation of the purification device 5, which can greatly improve the workshop environment.

[0076] Alternatively, if Figure 1 As shown, the exhaust gas treatment system also includes: a support base 10, an air collecting hood 4 and a purification device 5 are both arranged on the support base 10; the air collecting hood 4 includes a movable part 402 and a fixed part 401 that can open and close with each other, the air collecting hood is connected to the fixed part 401 through a pipe 6, and the movable part 402 is connected to the purification device 5.

[0077] Specifically, in practical applications, the support base 10 is provided so that the gas collecting hood 4 can be located at a specific position of the equipment generating the exhaust gas, for example, the die casting machine is placed below the support base 10, the support base 10 is supported by the legs 1, and the legs 1 are connected by the long connecting rod 2 and the short connecting rod 3 to play a reinforcing role. The gas collecting hood 4 is placed on the support base 10, and the other end of the support base 10 is provided with a purification device 5, and the purification device 5 is connected to the moving part 402 of the gas collecting hood 4 by a pipeline 6.

[0078] When the die casting machine changes the die, the moving part 402 of the gas collecting hood 4 starts to move, the fixed part 401 and the moving part 402 are separated from the middle, and the die is lifted out from the gap in the middle. After the die is lifted out, the moving part 402 moves toward the fixed part 401 and is sealed with the fixed part 401 again, and the die casting machine starts to work normally. After the exhaust gas is captured by the gas collecting hood 4, it is purified by the purification device 5.

[0079] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0080] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An exhaust gas treatment system, characterized in that: include: A gas collecting hood, a gas storage device and a purification device, wherein the gas collecting hood is used to capture exhaust gas; The purification device and the gas storage device are respectively connected to the gas collecting hood. The purification device is used to purify the exhaust gas in the gas collecting hood. The gas storage device can divert and store the exhaust gas in the gas collecting hood to keep the gas collecting hood in a negative pressure state.

2. The exhaust gas treatment system according to claim 1, characterized in that: The gas storage device comprises a gas storage component and a power component, and the gas storage component is connected to the gas collecting hood; The power assembly can make the exhaust gas in the air collecting hood flow toward the air storage assembly, and can also make the exhaust gas in the air storage assembly flow toward the air collecting hood.

3. The exhaust gas treatment system according to claim 2, characterized in that: The gas storage component comprises a gas storage cover, and the power component can compress or stretch the gas storage cover to allow the exhaust gas in the gas collecting cover and the gas storage cover to flow mutually.

4. The exhaust gas treatment system according to claim 3, characterized in that: The gas storage assembly further comprises a first bracket, and the power assembly comprises a driving member and a transmission member; The first bracket is fixed on the air collecting hood, the air storage hood and the driving member are arranged on the first bracket, and the driving member is connected to the air storage hood through the transmission member.

5. The exhaust gas treatment system according to claim 4, characterized in that: The air storage hood comprises a base, a movable partition and a telescopic cloth; The base is fixed to the bottom of the first bracket, the movable partition is movably arranged on the first bracket and is located above the base, the telescopic cloth is sealed and connected between the base and the movable partition, and the driving member is connected to the movable partition through the transmission member.

6. The exhaust gas treatment system according to claim 5, characterized in that: The transmission member includes a lead screw and a moving ring; The moving ring is arranged at the center of the moving partition, and the internal thread of the moving ring is meshed with the external thread of the lead screw; The driving member can drive the lead screw to rotate, and move the movable partition up and down through the movable ring to compress or stretch the telescopic cloth.

7. The exhaust gas treatment system according to claim 6, characterized in that: The first bracket includes four support rods and protective covers fixed on the top ends of the support rods, the movable partition is arranged on the four support rods through slip rings, and the driving member is fixed on the protective cover through the second bracket.

8. The exhaust gas treatment system according to claim 7, characterized in that: The second bracket includes a first support plate, a second support plate, a first positioning ring, a second positioning ring, a clamping plate and a connecting plate, the transmission member also includes a driving wheel, a belt and a driven wheel, and the driving member is a motor; The first support plate and the second support plate are respectively fixed on the protective cover and connected to each other through the connecting plate, the first positioning ring and the second positioning ring are fixed on the second support plate in sequence, and the first support plate is L-shaped; The motor is arranged on the first support plate and fixed by the clamping plate, the lead screw is passed through the first positioning ring and the second positioning ring, the driving wheel is assembled on the output end of the motor, the driven wheel is assembled on the lead screw, and the driving wheel and the driven wheel are connected by the belt transmission.

9. The exhaust gas treatment system according to claim 2, characterized in that: The gas storage assembly comprises a first valve, a second valve and a gas storage cover, and the gas storage cover is connected to the gas collecting cover through the first valve and the second valve; When the exhaust gas in the air collecting hood flows toward the air storage hood, the first valve is in an open state, and when the exhaust gas in the air storage hood flows toward the air collecting hood, the second valve is in an open state.

10. The exhaust gas treatment system according to claim 9, characterized in that: Also includes: A support base, on which the gas collecting hood and the purification device are both arranged; The gas collecting hood comprises a movable part and a fixed part which can be opened and closed with each other, the gas collecting hood is connected with the fixed part through a pipeline, and the movable part is communicated with the purification device.

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