Energy-saving type pollution gas collecting system based on intelligent control

Abstract

The utility model discloses an energy-saving polluted gas collecting system based on intelligent control, which can be used for adjusting the operation of the system according to real-time working conditions and collecting and treating waste gas timely and efficiently in an energy-saving manner. The system comprises an exhaust unit, an air inlet unit and a control unit, a plurality of blowdown devices are installed in the closed site, each blowdown device is provided with a device switch, the exhaust unit comprises an exhaust main pipe and a plurality of exhaust branch pipes, the exhaust branch pipes and the blowdown devices are arranged in a one-to-one correspondence mode, and the exhaust branch pipes are communicated to the exhaust main pipe. The exhaust branch pipe is provided with an exhaust on-off valve or an exhaust proportional valve, the exhaust main pipe is connected to the processing equipment, the tail end of the processing equipment is connected with an exhaust frequency conversion fan, the equipment switch is in feedback connection to the control unit, and the exhaust on-off valve, the exhaust proportional valve, the exhaust frequency conversion fan and the air inlet unit are in control connection to the control unit. The control unit can collect starting and stopping information of the multiple equipment switches and control the corresponding exhaust on-off valve, the exhaust proportional valve, the exhaust frequency conversion fan and the air inlet unit in real time.

Description

Technical Field

[0001] This utility model relates to the field of energy conservation and environmental protection technology, specifically to an energy-saving pollutant gas collection system based on intelligent control. Background Technology

[0002] Industrial production processes generate large amounts of dust and toxic gases. Currently, exhaust systems are commonly used to collect and treat the pervasive waste gases in workshops. However, these systems often employ high-powered fans to simultaneously extract waste gases from multiple exhaust devices, resulting in high power consumption and unsatisfactory waste gas removal efficiency. Waste gas collection is a systematic project, especially when multiple exhaust devices are installed in enclosed workshop areas, making the situation even more complex. Not only must the waste gases generated within the enclosed area be collected and treated by environmental protection equipment to meet emission standards, but appropriate supplementary airflow must also be provided to balance the internal and external pressures. Furthermore, the operating conditions of individual devices vary significantly; some emit waste gases continuously, while others emit them intermittently. Additionally, the emission concentration varies greatly depending on the specific operating conditions of each device. For example, a closed resin drying oven emits low-flow, low-concentration waste gases when the door is closed during the drying process, but experiences high-flow, high-concentration volatilization when the door is opened. In summary, the actual waste gas discharge conditions in production processes are quite complex. Currently, existing technologies for waste gas collection either increase the power of terminal fans to collect waste gas uniformly regardless of whether individual devices are running, and then treat it before emission; or they use variable frequency technology for terminal fans to manually adjust the fans to achieve system energy saving. However, since there are no corresponding parameters for this type of variable frequency, it can only be adjusted by human experience. Moreover, in order to save electricity, manufacturers usually set the frequency very low, and the actual production workshop is often filled with smoke. This is a problem that exists in the environmental protection industry as a whole and urgently needs to be solved. Summary of the Invention

[0003] To address the problems in the existing technology, this utility model provides an energy-saving pollutant gas collection system based on intelligent control. The system can adjust its operation according to real-time working conditions, enabling timely, efficient, and energy-saving collection and treatment of industrial waste gas. The system is simple, significantly reduces enterprise operating costs, and effectively improves the workshop environment.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: It includes an exhaust unit, an intake unit, and a control unit. Multiple sewage discharge devices are installed in an enclosed area. Each sewage discharge device has a switch for starting and stopping the device. The exhaust unit includes a main exhaust pipe and multiple branch exhaust pipes. Each branch exhaust pipe corresponds to one of the sewage discharge devices and is connected to the main exhaust pipe. Each branch exhaust pipe is equipped with an exhaust on / off valve or an exhaust proportional valve. The main exhaust pipe is connected to a treatment device. An exhaust variable frequency fan is connected to the end of the treatment device. The device switch is fed back to the control unit. The exhaust on / off valve, the exhaust proportional valve, the exhaust variable frequency fan, and the intake unit are controlled and connected to the control unit. The control unit can collect start / stop information from multiple device switches and control the corresponding exhaust on / off valve, the corresponding exhaust proportional valve, the exhaust variable frequency fan, and the intake unit in real time.

[0005] Furthermore, the air intake unit includes an air intake main pipe and multiple air intake branch pipes, the multiple air intake branch pipes being connected to the air intake main pipe, and the multiple air intake branch pipes being configured one-to-one with multiple sewage discharge devices.

[0006] Furthermore, the intake end of the intake pipe is equipped with an intake variable frequency fan, and the intake variable frequency fan is controlled and connected to the control unit.

[0007] Furthermore, the intake branch pipe is equipped with an intake on / off valve or an intake proportional valve, and the intake on / off valve and the intake proportional valve are controlled and connected to the control unit.

[0008] Furthermore, the exhaust manifold is equipped with a concentration detection sensor, which is connected to the control unit for feedback.

[0009] Furthermore, the exhaust manifold is equipped with a flow detection sensor, which is connected to the control unit for feedback.

[0010] Furthermore, the sewage discharge equipment is equipped with a gas collection hood, which is connected to the main exhaust pipe through a corresponding exhaust branch pipe.

[0011] Furthermore, the control unit includes a PLC controller.

[0012] Furthermore, the exhaust branch pipe is provided with a one-way component, which is configured to allow exhaust gas to enter the exhaust main pipe only from the exhaust branch pipe.

[0013] Compared with existing technologies, the exhaust unit of this utility model includes an exhaust main pipe and multiple exhaust branch pipes corresponding to the sewage discharge equipment. Each exhaust branch pipe is equipped with an exhaust on / off valve or an exhaust proportional valve. The exhaust main pipe is connected to the treatment equipment, and the end of the treatment equipment is connected to an exhaust frequency converter fan. Equipment switch feedback is connected to the control unit. The exhaust on / off valve, exhaust proportional valve, exhaust frequency converter fan, and intake unit are controlled and connected to the control unit. The control unit can collect and obtain the start / stop information of multiple equipment switches in real time, thereby controlling the opening and closing of the exhaust on / off valve or the opening degree of the exhaust proportional valve of the corresponding sewage discharge equipment. Furthermore, it can judge based on the summarized status of the exhaust on / off valve and exhaust proportional valve of multiple sewage discharge equipment, and adjust the frequency of the exhaust frequency converter fan, as well as the flow rate and frequency of the intake unit. This allows for real-time adjustment of flow rate and frequency control according to the specific actual operating conditions of multiple sewage discharge equipment, ensuring timely and efficient discharge of waste gas and real-time replenishment of fresh air, maintaining a relatively balanced pressure within the enclosed workshop. This utility model can adjust the system in real time according to the real-time operating conditions of the sewage discharge equipment, is energy-efficient and simple, significantly reduces enterprise operating costs, and effectively improves the workshop environment.

[0014] Furthermore, the air intake unit includes multiple air intake branch pipes that correspond one-to-one with multiple sewage discharge devices. That is, each sewage discharge device is equipped with an exhaust branch pipe and an air intake branch pipe. If the sewage discharge device generates waste gas, it will exhaust the waste gas through the exhaust branch pipe and simultaneously replenish the air through the air intake branch pipe, thereby maximizing the achievement of dynamic pressure balance.

[0015] Furthermore, the intake variable frequency fan can obtain the actual operating conditions of multiple sewage discharge devices through the control unit, and while efficiently and energy-savingly exhausting the air, it can control the flow rate and frequency of the intake variable frequency fan in real time, and make up for the air in real time and efficiently, so as to achieve dynamic balance of pressure in the enclosed space, save energy and protect the environment, and reduce costs and increase efficiency.

[0016] Furthermore, the intake branch pipe is equipped with an intake on / off valve or an intake proportional valve. The control unit controls the opening and closing of the intake on / off valve or the opening degree of the intake proportional valve corresponding to the sewage discharge equipment based on the real-time collected operating information of multiple sewage discharge equipment, thereby accurately and energy-efficiently supplementing air and achieving real-time high-efficiency energy saving.

[0017] Furthermore, the exhaust branch pipe is equipped with a concentration detection sensor or a flow detection sensor. For sewage discharge equipment where the concentration or flow rate of the exhaust gas changes, when the concentration detection sensor detects a change in the exhaust gas concentration or the flow detection sensor detects a change in the exhaust gas flow rate, the control unit adjusts the opening of the exhaust proportional valve and the intake proportional valve in a timely manner to discharge the exhaust gas and replenish fresh air to the maximum efficiency.

[0018] Furthermore, by installing a gas collection hood over the sewage discharge equipment, the spread of exhaust gas is minimized, thereby improving the exhaust efficiency. A one-way valve is installed on the exhaust branch pipe, ensuring that exhaust gas only flows from the branch pipe into the main exhaust pipe and does not flow back from the main exhaust pipe to the branch pipe. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the system structure of this utility model;

[0020] Figure 2 This is the system control logic schematic diagram of this utility model;

[0021] Among them, 1 is the sewage discharge equipment, 2 is the equipment switch, 3 is the exhaust main pipe, 4 is the exhaust branch pipe, 5 is the gas collection hood, 6 is the exhaust on / off valve, 7 is the treatment equipment, 8 is the exhaust variable frequency fan, 9 is the exhaust proportional valve, 10 is the concentration detection sensor, 11 is the flow detection sensor, 12 is the intake main pipe, 13 is the intake variable frequency fan, 14 is the intake branch pipe, 15 is the intake on / off valve, 16 is the intake proportional valve, and 17 is the control unit. Detailed Implementation

[0022] The present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] This invention provides an energy-saving pollutant gas collection system based on intelligent control, see details below. Figure 1 and Figure 2 The system includes an exhaust unit, an intake unit, and a control unit 17. Multiple sewage discharge devices 1 are installed in the enclosed area. Each sewage discharge device 1 has a device switch 2 for starting and stopping the sewage discharge device 1. The exhaust unit includes an exhaust main pipe 3 and multiple exhaust branch pipes 4. The multiple exhaust branch pipes 4 are configured one-to-one with each sewage discharge device 1. The multiple exhaust branch pipes 4 are connected to the exhaust main pipe 3. Each exhaust branch pipe 4 is equipped with an exhaust on / off valve 6 or an exhaust proportional valve 9. The exhaust main pipe 3 is connected to a treatment device 7. The end of the treatment device 7 is connected to an exhaust variable frequency fan 8. The device switch 2 is fed back to the control unit 17. The exhaust on / off valve 6, the exhaust proportional valve 9, the exhaust variable frequency fan 8, and the intake unit are controlled and connected to the control unit 17. The control unit 17 can collect the start and stop information of multiple device switches 2 and control the corresponding exhaust on / off valve 6, the corresponding exhaust proportional valve 9, the exhaust variable frequency fan 8, and the intake unit in real time.

[0024] The exhaust unit of this utility model includes an exhaust main pipe 3 and multiple exhaust branch pipes 4, each corresponding to a sewage discharge device 2. Each exhaust branch pipe 4 is equipped with an exhaust on / off valve 6 or an exhaust proportional valve 9. The exhaust main pipe 3 is connected to a treatment device 7, and the end of the treatment device 7 is connected to an exhaust frequency converter fan 8. Equipment switches 2 are fed back to a control unit 17. The exhaust on / off valve 6, exhaust proportional valve 9, exhaust frequency converter fan 8, and intake unit are controlled and connected to the control unit 17. The control unit 17 can collect and obtain the start / stop information of multiple equipment switches 2 in real time, thereby controlling the opening and closing of the exhaust on / off valve 6 or the opening degree of the exhaust proportional valve 9 of the corresponding sewage discharge device 1. Furthermore, based on the combined status of the exhaust on / off valves 6 and exhaust proportional valves 9 corresponding to multiple sewage discharge devices 1, the system can determine and adjust the frequency of the exhaust variable frequency fan 8, as well as the flow rate and frequency of the intake unit. This allows for real-time adjustment of flow rate and frequency control according to the specific actual operating conditions of multiple sewage discharge devices 1, ensuring timely and efficient discharge of waste gas and real-time replenishment of fresh air, thus maintaining a relatively balanced pressure within the enclosed workshop. This invention enables real-time adjustment of the system based on the real-time operating conditions of the sewage discharge devices 1, resulting in energy efficiency, a simple system, significantly reduced enterprise operating costs, and effective improvement of the workshop environment.

[0025] Specifically, the air intake unit includes a main air intake pipe 12 and multiple air intake branch pipes 14. The multiple air intake branch pipes 14 are connected to the main air intake pipe 12, and each of the multiple air intake branch pipes 14 is correspondingly set to one of the multiple sewage discharge devices 1. The multiple air intake branch pipes 14 are correspondingly set to one of the multiple sewage discharge devices 1, that is, each sewage discharge device 1 is provided with an exhaust branch pipe 4 and an air intake branch pipe 14. If the sewage discharge device 1 generates exhaust gas, it will exhaust the exhaust gas through the exhaust branch pipe 4, and at the same time, it will also make up the air through the air intake branch pipe 14, so as to achieve dynamic pressure balance to the maximum extent.

[0026] More specifically, an intake variable frequency fan 13 is installed at the intake end of the intake pipe 12, and the intake variable frequency fan 13 is controlled and connected to the control unit 17. The intake variable frequency fan 13 can obtain the actual operating conditions of multiple sewage discharge devices 1 through the control unit 17, and while efficiently and energy-savingly exhausting the sewage, it can control the flow rate and frequency of the intake variable frequency fan 13 in real time, and perform real-time and efficient air replenishment, so as to achieve dynamic balance of pressure in the enclosed space, save energy and protect the environment, and reduce costs and increase efficiency.

[0027] More specifically, the intake branch pipe 14 is equipped with an intake on / off valve 15 or an intake proportional valve 16, which is connected to the control unit 17. The intake branch pipe 14 is equipped with an intake on / off valve 15 or an intake proportional valve 16. Based on real-time acquired operating information from multiple sewage discharge devices 1, the control unit 17 controls the opening and closing of the corresponding intake on / off valve 15 or the opening degree of the intake proportional valve 16 for each sewage discharge device 1, thereby precisely and energy-efficiently replenishing air, achieving real-time and high-efficiency energy saving.

[0028] Preferably, the exhaust branch pipe 4 is equipped with a concentration detection sensor 10, which is connected to the control unit 17. For the sewage discharge equipment 1 where the concentration of the exhaust gas changes, when the concentration detection sensor 10 detects a change in the exhaust gas concentration, the control unit 17 adjusts the opening of the exhaust proportional valve 9 and the intake proportional valve 16 in a timely manner to discharge the exhaust gas and replenish fresh air to the maximum efficiency.

[0029] Preferably, the exhaust branch pipe 4 is equipped with a flow detection sensor 11, which is connected to the control unit 17. For the sewage discharge equipment 1, which emits waste gas with varying flow rates, when the flow detection sensor 11 detects a change in waste gas flow rate, the control unit 17 adjusts the opening of the exhaust proportional valve 9 and the intake proportional valve 16 in a timely manner to maximize the efficient discharge of waste gas and replenish fresh air.

[0030] Preferably, the sewage discharge equipment 1 is equipped with a gas collection hood 5, which is connected to the main exhaust pipe 3 via a corresponding exhaust branch pipe 4. By installing the gas collection hood 5 on the sewage discharge equipment 1, the spread of exhaust gas is minimized, and the exhaust gas discharge efficiency is improved.

[0031] The control unit 17 of this utility model includes a PLC controller. PLC programmable logic controllers are widely used in the field of industrial automation. They are resistant to high temperatures, dust, and electromagnetic interference, adaptable to harsh industrial environments, have a long mean time between failures, and the program can be adjusted in real time without stopping the machine, thus improving production efficiency, adapting to different working conditions, and are low in cost.

[0032] Preferably, the exhaust branch pipe 4 is equipped with a one-way valve, which is configured to allow exhaust gas to enter the exhaust main pipe 3 only from the exhaust branch pipe 4. The one-way valve ensures that exhaust gas only enters the exhaust main pipe 3 from the exhaust branch pipe 4, preventing it from flowing back from the exhaust main pipe 3 to the exhaust branch pipe 4. The one-way valve can be a check valve, installed vertically on the exhaust branch pipe 4. Using a low-cost check valve as the one-way valve, which is a purely gravity-operated mechanical valve, allows the valve leaf to automatically close the exhaust branch pipe 4 under its own weight when the exhaust on / off valve 6 or the exhaust proportional valve 9 is not activated, ensuring that exhaust gas does not flow back to the gas collection hood 5. Only when the exhaust on / off valve 6 or the exhaust proportional valve 9 is activated does the airflow push up the valve leaf, allowing the airflow to enter the exhaust branch pipe 4 and the exhaust main pipe 3 from the gas collection hood 5. This design is simple and inexpensive. The one-way component can also be an electric damper, which is controlled and connected to the control unit 17. The electric damper is linked to the exhaust on-off valve 6 or the exhaust proportional valve 9 for control. By using the linkage control connection between the electric damper and the exhaust on-off valve 6 or the exhaust proportional valve 9, the start or stop of the exhaust on-off valve 6 or the exhaust proportional valve 9 is guaranteed. At the same time, the electric damper is linked to start or stop, ensuring that multiple sewage discharge devices 1 are individually interlocked and do not interfere with each other. There is no need for overall start-up, the structure and control are simple, and energy consumption is reduced.

[0033] This utility model can be adapted to the specific operating conditions of the sewage discharge equipment 1. For example, for sewage discharge equipment 1 with continuous, intermittent, or occasional discharge, an exhaust on / off valve 6 is installed on its corresponding exhaust branch pipe 4, and an intake on / off valve 15 is installed on its corresponding intake branch pipe 14. The control unit 17 only controls the opening and closing of the exhaust on / off valve 6 and the intake on / off valve 15. Only for sewage discharge equipment 1 with changes in sewage concentration or flow rate, a concentration detection sensor 10 or a flow detection sensor 11 is installed on its corresponding exhaust branch pipe 4. At the same time, an exhaust proportional valve 9 is installed on the exhaust branch pipe 4, and an intake proportional valve 16 is installed on its corresponding intake branch pipe 14. Through concentration or flow detection, the control unit 17 controls the opening degree and opening and closing of the exhaust proportional valve 9 and the intake proportional valve 16 in real time, i.e., the exhaust gas parameter Q. 高浓度 and Q 高流量 At that time, the exhaust proportional valve 9 and the intake proportional valve 16 are opened to a larger degree; that is, the exhaust gas parameter Q 低浓度 and Q 低流量 At this time, the opening degree of the exhaust proportional valve 9 and the intake proportional valve 16 is relatively small. Different types of valves are set for different sewage discharge equipment 1 to save energy, reduce consumption, and lower costs.

[0034] The processing equipment 7 of this utility model is a waste gas treatment equipment, which can treat dust, harmful gases and other substances in waste gas. The processing equipment 7 is also connected to a chimney, and a spray device or other device can be installed inside the chimney to improve the dust removal and pollution reduction effect.

[0035] The exhaust gas emitted by the sewage discharge equipment 1 of this utility model is collected through the gas collection hood 5, exhaust branch pipe 5 and exhaust main pipe 5 and enters the treatment equipment 7 for exhaust gas purification. An exhaust variable frequency fan 8 is installed at the end of the treatment equipment 7. An electric exhaust on / off valve 6 is installed on the exhaust branch pipe 4 of the sewage discharge equipment 1 for continuous, intermittent or short-term sewage discharge. An electric exhaust proportional valve 9 is installed on the exhaust branch pipe 4 of the sewage discharge equipment 1 for multiple states, that is, when the concentration or flow rate changes. A concentration detection sensor 10 or a flow detection sensor 11 is installed in this type of sewage discharge equipment 1. A fresh air system, that is, an air intake unit, is set up in the entire enclosed factory area. All sewage discharge sensor signals, sewage discharge fan signals, air supply fan signals, electric valve and proportional regulating valve start / stop signals and equipment start / stop signals in the system are connected to the control unit 17.

[0036] Control unit 17 includes a PLC logic controller, whose control logic includes: firstly, the total exhaust fan air volume is set to the sum of the air volumes of all sewage discharge equipment 1; for proportional regulating valve control equipment, the exhaust volume is set according to the maximum sewage discharge condition. Taking six sewage discharge devices in the workshop as an example, that is: Q 总 =Q1+Q2+Q3+Q 4高浓度 +Q 5高流量+Q6, the start / stop signal of a single sewage discharge device 1 is collected to the PLC logic control unit. The PLC calculates the total air volume required to start the device under the actual condition based on the on / off status of each device. The frequency, air pressure, and air volume parameters or vector curves of the existing exhaust variable frequency fan 8 and intake variable frequency fan 13 are pre-input into the PLC control unit. At the same time, the system pre-inputs parameters such as pressure loss of the environmental protection equipment and pipeline system of the waste gas collection system. Based on the actual air volume required to start the device and the parameters of the fans and system in the system, the logic control unit matches the data through the database of pipeline system parameters, environmental protection equipment parameters, exhaust fan parameters, and supply fan parameters set in the system, and outputs the most matching frequency parameters of exhaust variable frequency fan 8 and intake variable frequency fan 13 under this working condition. The PLC logic control unit sends the parameters to exhaust variable frequency fan 8 and intake variable frequency fan 13 for real-time adjustment.

[0037] After the start signal of a single sewage discharge device 1 is collected, it is input to the PLC logic control unit 17. The control unit 17 sends a signal to open the exhaust valve 6 on the top of the corresponding sewage discharge device 1. After the sewage discharge device 1 finishes working, the shut-off signal is also collected to the control unit 17. The control unit 17 closes the exhaust valve 6 on the top of the sewage discharge device according to this signal. At the same time, the exhaust volume of the single device is deducted in the PLC logic control unit. The control unit 17 then matches the corresponding supply and exhaust air parameter database in the system again and adjusts the fan frequency in real time to achieve a new system balance.

[0038] For equipment with significant differences in discharge concentration and discharge flow, for discharge equipment 1 with varying concentration or flow, a corresponding sensor, exhaust proportional valve 9, and intake proportional valve 16 are installed at the top discharge port. After the sensor detects the corresponding concentration or flow data, it sends a signal to the logic control unit 17. The control unit 17 adjusts the opening degree of the electric proportional regulating valve at the top of the corresponding discharge port in real time according to the discharge concentration or discharge flow of the equipment, thereby increasing or decreasing the exhaust volume according to the real-time discharge concentration and real-time discharge volume of pollutants. At the same time, the logic control unit adjusts the frequency of the exhaust variable frequency fan 8 and the intake variable frequency fan 13 based on the exhaust volume, so that the system can achieve dynamic balance in real time.

[0039] This invention can acquire the start-up and shutdown status of multiple sewage discharge devices 1 and changes in waste gas concentration or flow rate in real time according to the different operating conditions of each device 1. It can control the opening and closing of each valve and the opening degree in real time, control the frequency of the exhaust variable frequency fan 8 and the intake variable frequency fan 13 in real time, and adjust the waste gas flow rate in the system in a timely manner to achieve the most economical and efficient operating conditions. It can collect and treat industrial waste gas in a timely, efficient and energy-saving manner. The system is simple, greatly reduces the operating costs of enterprises, and effectively improves the workshop environment.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An energy-saving pollutant gas collection system based on intelligent control, characterized in that, The system includes an exhaust unit, an intake unit, and a control unit (17). Multiple sewage discharge devices (1) are installed within the enclosed area. Each sewage discharge device (1) has a device switch (2) for starting and stopping the device. The exhaust unit includes an exhaust main pipe (3) and multiple exhaust branch pipes (4). Each exhaust branch pipe (4) corresponds to one of the multiple sewage discharge devices (1). The multiple exhaust branch pipes (4) are connected to the exhaust main pipe (3). Each exhaust branch pipe (4) is equipped with an exhaust on / off valve (6) or an exhaust proportional valve (9). The exhaust main pipe (3) is connected to the... The processing equipment (7) is connected to an exhaust variable frequency fan (8) at its end. The equipment switch (2) is fed back to the control unit (17). The exhaust on / off valve (6), the exhaust proportional valve (9), the exhaust variable frequency fan (8) and the air intake unit are controlled and connected to the control unit (17). The control unit (17) can collect the start and stop information of multiple equipment switches (2) and control the corresponding exhaust on / off valve (6), the corresponding exhaust proportional valve (9), the exhaust variable frequency fan (8) and the air intake unit in real time.

2. The energy-saving pollutant gas collection system based on intelligent control according to claim 1, characterized in that, The air intake unit includes an air intake main pipe (12) and multiple air intake branch pipes (14). The multiple air intake branch pipes (14) are connected to the air intake main pipe (12), and the multiple air intake branch pipes (14) are configured one-to-one with multiple sewage discharge devices (1).

3. The energy-saving pollutant gas collection system based on intelligent control according to claim 2, characterized in that, The intake end of the intake pipe (12) is equipped with an intake variable frequency fan (13), and the intake variable frequency fan (13) is controlled and connected to the control unit (17).

4. The energy-saving pollutant gas collection system based on intelligent control according to claim 3, characterized in that, The intake branch pipe (14) is equipped with an intake on / off valve (15) or an intake proportional valve (16), and the intake on / off valve (15) and the intake proportional valve (16) are controlled and connected to the control unit (17).

5. An energy-saving pollutant gas collection system based on intelligent control according to any one of claims 1 to 4, characterized in that, The exhaust branch pipe (4) is equipped with a concentration detection sensor (10), which is connected to the control unit (17).

6. An energy-saving pollutant gas collection system based on intelligent control according to any one of claims 1 to 4, characterized in that, The exhaust branch pipe (4) is equipped with a flow detection sensor (11), which is connected to the control unit (17).

7. An energy-saving pollutant gas collection system based on intelligent control according to any one of claims 1 to 4, characterized in that, The sewage discharge equipment (1) is covered with a gas collection hood (5), and the gas collection hood (5) is connected to the main exhaust pipe (3) through the corresponding exhaust branch pipe (4).

8. An energy-saving pollutant gas collection system based on intelligent control according to any one of claims 1 to 4, characterized in that, The control unit (17) includes a PLC controller.

9. An energy-saving pollutant gas collection system based on intelligent control according to any one of claims 1 to 4, characterized in that, The exhaust branch pipe (4) is provided with a one-way component, which is configured to allow exhaust gas to enter the exhaust main pipe (3) only from the exhaust branch pipe (4).

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