A purification device for low concentration large exhaust volume

Abstract

The utility model discloses a kind of purification device for low concentration large exhaust capacity, it includes purification box body, main pipe, fan being arranged at the air outlet of purification box body, and PLC controller, main pipe air inlet is connected with several branch pipes, the air inlet of several branch pipes is respectively provided with first air valve control assembly, purification box body is provided with multiple purification assemblies inside, fan and frequency converter are electrically connected, frequency converter and PLC controller are electrically connected, PLC controller and display screen are electrically connected;The utility model can improve the utilization of activated carbon inside purification box body.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection technology, and in particular to a purification device for low-concentration, high-volume exhaust air. Background Technology

[0002] Universities have numerous laboratories, which generate various waste gases during experiments. These gases not only pollute the outside air but also affect the health of people inside the laboratories. Therefore, purification equipment is needed to treat the waste gases or air generated during experiments. Currently, activated carbon purification boxes are commonly used for purifying laboratory gases. However, existing activated carbon purification boxes have a fixed air volume, while university laboratories are numerous and their ventilation is characterized by large air volume, low concentration of harmful substances, and discontinuous operation. Therefore, in actual operation, several laboratories are usually conducting experiments simultaneously, and the exhaust system operates under partial load most of the time. For small laboratory ventilation with low-concentration waste gases, the activated carbon in the activated carbon purification box is generally replaced every 3-6 months. If the minimum replacement cycle is followed, by the time the replacement cycle is reached, the actual adsorption capacity of most activated carbon is far below the equilibrium maintenance capacity, resulting in low overall utilization of activated carbon. Replacing all the activated carbon in the activated carbon purification box at this time would result in significant waste. Therefore, we propose a purification device for low-concentration, high-volume exhaust gases. Utility Model Content

[0003] The problem this invention aims to solve is the low utilization rate of activated carbon in activated carbon purification boxes used for purifying waste gas from multiple laboratories in the prior art.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a purification device for low concentration and large exhaust volume, comprising a purification box body, a main pipe connected to the air inlet of the purification box body, a fan disposed at the air outlet of the purification box body, and a PLC controller. The air inlet of the main pipe is connected to several branch pipes, and a first air valve control component is disposed at the air inlet of each of the several branch pipes. Multiple purification components are disposed inside the purification box body. The fan is electrically connected to a frequency converter, the frequency converter is electrically connected to the PLC controller, and the PLC controller is electrically connected to a display screen.

[0005] As a preferred embodiment of the purification device for low concentration and large exhaust volume described in this utility model, wherein: a first partition and a second partition are provided at intervals on both sides inside the purification box body, and the first partition, the second partition, and the inner wall of the purification box body are divided into multiple ventilation chambers by a number of partitions at equal intervals, and the first partition and the second partition are respectively provided with air inlet and air outlet at positions corresponding to the ventilation chambers.

[0006] As a preferred embodiment of the purification device for low concentration and large exhaust volume described in this utility model, the purification component includes an activated carbon component disposed in the ventilation chamber and a second air valve control component disposed at the air inlet.

[0007] As a preferred embodiment of the purification device for low concentration and large exhaust volume described in this utility model, the first air valve control component includes a control panel, a first switch controller, and a first air valve that are electrically connected in sequence. The first air valve is located at the air inlet of the branch pipe, and the first switch controller is electrically connected to the PLC controller.

[0008] As a preferred embodiment of the purification device for low concentration and large exhaust volume described in this utility model, the second air valve control component includes a second switch controller and a timer that are electrically connected to the second air valve respectively. The second air valve is located at the air inlet. The second switch controller and the timer are also connected to a PLC controller respectively.

[0009] As a preferred embodiment of the purification device for low concentration and large exhaust volume described in this utility model, the main pipe is equipped with a wind pressure sensor, which is electrically connected to the PLC controller.

[0010] As a preferred embodiment of the purification device for low concentration and large exhaust volume described in this utility model, the top of the purification box body is provided with a material replacement port, a sealing cover is hinged to the material replacement port, and the sealing cover is also provided with a handle.

[0011] As a preferred embodiment of the purification device for low concentration and large exhaust volume described in this utility model, a snap-fit ​​plate is rotatably provided on one side of the top of the sealing cover, and a snap-fit ​​block is provided on the top side of the purification box body near the sealing cover, with a notch at the bottom of the snap-fit ​​block that matches the snap-fit ​​plate.

[0012] As a preferred embodiment of the purification device for low concentration and large exhaust volume described in this utility model, the activated carbon component includes a mounting frame, the front and rear walls of the mounting frame are evenly distributed with through holes, the width of the mounting frame is equal to the width of the ventilation chamber, and activated carbon is placed inside the mounting frame.

[0013] The beneficial effects of this utility model are as follows: By connecting several branch pipes to the laboratory respectively, the gas emitted from the laboratory in use enters the purification chamber through the branch pipes and main pipe in sequence through the first air valve control component. The number of ventilation chambers can be automatically controlled to filter the exhaust gas according to the number of laboratories in use, which can maximize the utilization rate of the activated carbon components inside the purification chamber and avoid the low utilization rate of activated carbon caused by directly opening all activated carbon components. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of a purification device for low-concentration, high-volume exhaust air.

[0015] Figure 2 This is a visual representation of the purification chamber body in a purification device used for low-concentration, high-volume airflow purification system.

[0016] Figure 3 This is a schematic diagram of the purification box body after removing the sealing cover in a purification device for low-concentration, high-volume exhaust.

[0017] Figure 4 This is a schematic diagram of the internal structure of the purification box body in a purification device for low concentration and large exhaust volume. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Reference Figures 1-4 This embodiment is a purification device for low-concentration, high-volume exhaust air, including a purification box body 100, a main pipe 200 connected to the air inlet of the purification box body 100, a fan 300 disposed at the air outlet of the purification box body 100, and a PLC controller 500. The air inlet of the main pipe 200 is connected to several branch pipes 201, and a first air valve control component 400 is disposed at the air inlet of each of the several branch pipes 201. Multiple purification components are disposed inside the purification box body 100. The fan 300 is electrically connected to a frequency converter 301, the frequency converter 301 is electrically connected to the PLC controller 500, and the PLC controller 500 is electrically connected to a display screen 501.

[0020] Each branch pipe 201 corresponds to a laboratory. The first air valve control component 400 at the air inlet of the branch pipe 201 controls the opening and closing of the branch pipe 201. When several of the multiple laboratories are in experimental mode, the first air valve control component 400 on the corresponding branch pipe 201 is opened. At this time, the PLC controller 500 controls the fan 300 to rotate. The fan 300 drives the air flow in the purification box body 100, the main pipe 200, and the branch pipe 201, so that the exhaust gas in the laboratory enters the purification box body 100 through the branch pipe 201 and the main pipe 200 and is filtered by the purification components. Since most of the multiple laboratories are only a few open at a certain time, the number of purification components installed inside the purification box body 100 can be set according to the number of branch pipes 201 that are open, such as 1 to 3. When the first air valve control component 400 at the end of branch pipe 201 is opened, one purification component is used for filtration inside the purification box body 100. When the first air valve control components 400 at the ends of 4 to 6 branch pipes 201 are opened, two purification components are used for filtration inside the purification box body 100. This maximizes the utilization rate of the purification components inside the purification box body 100. High-frequency purification components are replaced when they expire, while unused activated carbon components 105 do not need to be replaced. In special cases, such as when multiple laboratories are operating at full capacity, the first air valve control components 400 at the ends of the corresponding multiple branch pipes 201 are all opened, and all purification components inside the purification box body 100 will be put into use at the same time, avoiding poor filtration effect of the purification box body 100 when exhaust gases from multiple laboratories are discharged together.

[0021] In this embodiment, a first partition 101 and a second partition 102 are provided on both sides of the interior of the purification box body 100. The first partition 101, the second partition 102, and the inner wall of the purification box body 100 are divided into multiple ventilation chambers 104 by a number of partition plates 103 at equal intervals. The first partition 101 and the second partition 102 are respectively provided with air inlet holes 101a and air outlet holes 102a at positions corresponding to the ventilation chambers 104.

[0022] In this embodiment, the purification component includes an activated carbon component 105 disposed in the ventilation chamber 104, and a second air valve control component 106 disposed at the air inlet 101a.

[0023] Since most laboratories only operate a few units at a time, the number of second air valve control components 106 on the multiple air inlets 101a inside the purification chamber body 100 can be set according to the number of branch pipes 201 that are open. For example, when the first air valve control components 400 at the ends of 1 to 3 branch pipes 201 are open, one second air valve control component 106 is opened on the multiple air inlets 101a inside the purification chamber body 100; when the first air valve control components 400 at the ends of 4 to 6 branch pipes 201 are open, two second air valve control components are opened on the multiple air inlets 101a inside the purification chamber body 100. Component 106 allows for maximum utilization of the multiple activated carbon components 105 inside the purification chamber body 100. When it's time to replace the activated carbon components 105, the used ones are replaced first, while unused ones do not need to be replaced. In special circumstances, such as when multiple laboratories are operating at full capacity, the first air valve control components 400 at the ends of the corresponding multiple branch pipes 201 are all opened, and the second air valve control components 106 on the multiple air inlets 101a inside the purification chamber body 100 are also all opened, preventing poor filtration of the purification chamber body 100 when exhaust gases from multiple laboratories are discharged together. In this embodiment, the first air valve control component 400 includes a control panel 401, a first switch controller 402, and a first air valve 403, which are electrically connected in sequence. The first air valve 403 is located at the air inlet of the branch pipe 201, and the first switch controller 402 is electrically connected to the PLC controller 500.

[0024] The operator can operate the first switch controller 402 through the control panel 401, and control the opening or closing of the first air valve 403 through the first switch controller 402. When the first air valve 403 is opened, the first switch controller 402 transmits a signal to the PLC controller 500, and the PLC controller 500 controls the fan 300 to start.

[0025] In this embodiment, the second air valve control component 106 includes a second switch controller 106a and a timer that are electrically connected to the second air valve 106b. The second air valve 106b is located at the air inlet 101a. The second switch controller 106a and the timer are also connected to the PLC controller 500.

[0026] When the PLC controller 500 receives a signal from a set number of first switch controllers 402, it controls the opening of a corresponding set number of second switch controllers 106a. The second switch controllers 106a control the opening of the second air valves 106b. At this time, the exhaust gas can enter the corresponding ventilation chamber 104 through the second air valves 106b and be filtered by the activated carbon component 105. The timer can record the opening time of each second switch controller 106a and send the data to the PLC controller 500 for display on the display screen 501.

[0027] In this embodiment, a wind pressure sensor 202 is installed inside the main pipe 200, and the wind pressure sensor 202 is electrically connected to the PLC controller 500.

[0028] The wind pressure sensor 202 can measure the wind pressure inside the main pipe 200 and send the data to the PLC controller 500. The PLC controller 500 controls the frequency converter 301, which in turn controls the fan 300 to increase or decrease the exhaust volume.

[0029] In this embodiment, the top of the purification box body 100 is provided with a material exchange port 100a, and a sealing cover 107 is hinged at the material exchange port 100a. The sealing cover 107 is also provided with a handle 107d.

[0030] When it is necessary to replace the activated carbon in the activated carbon component 105 in the ventilation chamber 104, open the sealing cover 107 at the top of the purification box body 100, take out the activated carbon component 105, and close the sealing cover 107 after replacement.

[0031] In this embodiment, a snap-fit ​​plate 107a is rotatably provided on one side of the top of the sealing cover 107, and a snap-fit ​​block 107b is provided on the top side of the purification box body 100 near the sealing cover 107. The bottom of the snap-fit ​​block 107b is provided with a notch 107c that matches the snap-fit ​​plate 107a.

[0032] Rotate the snap-fit ​​plate 107a until it snaps into the notch 107c at the bottom of the snap-fit ​​block 107b.

[0033] In this embodiment, the activated carbon assembly 105 includes a mounting frame 105a, with through holes 105b evenly distributed on the front and rear walls of the mounting frame 105a. The width of the mounting frame 105a is equal to the width of the ventilation chamber 104, and activated carbon is placed inside the mounting frame 105a.

[0034] The exhaust gas passes through the through hole 105b on the mounting frame 105a and is filtered by contact with the activated carbon inside the mounting frame 105a.

[0035] Working principle: Each branch pipe 201 corresponds to one laboratory. The first air valve control component 400 at the air inlet of the branch pipe 201 controls the opening and closing of the branch pipe 201. The operator can operate the first switch controller 402 to open or close the first air valve 403 by manipulating the control panel 401 in the first air valve control component 400. When the first air valve 403 is open, the first switch controller 402 sends a signal to the PLC controller 500. The PLC controller 500 controls the fan 300 to turn on. The fan 300 drives the air flow in the purification chamber body 100, the main pipe 200 and the branch pipe 201, so that the exhaust gas in the laboratory enters the ventilation chamber 10 inside the purification chamber body 100 in sequence through the branch pipe 201 and the main pipe 200. Inside the 4th chamber, exhaust gas passes through the through-hole 105b on the mounting frame 105a and comes into contact with the activated carbon inside the mounting frame 105a for filtration. When several of the multiple laboratories are in experimental condition, the first air valve 403 on the corresponding branch pipe 201 is opened. Since most of the multiple laboratories only open a few of them at a certain time, the number of second air valves 106b on the multiple air inlets 101a inside the purification box body 100 can be set according to the number of first air valves 403 on the branch pipe 201 that are opened. When the PLC controller 500 receives the signal sent by the set number of first switch controllers 402, it controls the opening of the corresponding set number of second switch controllers 106a. The second switch controllers 106a control the second air... When valve 106b is opened, exhaust gas can enter the corresponding ventilation chamber 104 through the second air valve 106b and be filtered by the activated carbon component 105. The timer records the opening time of the second switch controller 106a and sends the data to the PLC controller 500 for display on the screen 501. The number of times the first air valve 403 and the second air valve 106b are open can be set. For example, when the first air valve 403 at the ends of 1 to 3 branch pipes 201 is open, one second air valve 106b is opened on each of the multiple air inlets 101a inside the purification chamber body 100; when the first air valve 403 at the ends of 4 to 6 branch pipes 201 is open, two second air valves 106b are opened on each of the multiple air inlets 101a inside the purification chamber body 100. 6b. This design maximizes the utilization of multiple activated carbon components 105 inside the purification chamber 100. When an activated carbon component 105 is due for replacement, it is prioritized for replacement, while unused components do not need to be replaced, thus improving the utilization rate of activated carbon. In special circumstances, such as when multiple laboratories are operating at full capacity, the first air valves 403 at the ends of the corresponding multiple branch pipes 201 are all opened, and the second air valves 106b on the multiple air inlets 101a inside the purification chamber 100 are also all opened. This prevents poor filtration of the purification chamber 100 when exhaust gases from multiple laboratories are emitted simultaneously. The wind pressure sensor 202 measures the wind pressure inside the main pipe 200 and sends the data to the PLC controller 500.The PLC controller 500 controls the frequency converter 301, which in turn controls the fan 300 to increase or decrease the exhaust volume. When it is necessary to replace the activated carbon in the activated carbon assembly 105 in the ventilation chamber 104, open the sealing cover 107 at the top of the purification box body 100, take out the activated carbon assembly 105, close the sealing cover 107 after replacement, and rotate the locking plate 107a until the locking plate 107a is engaged in the notch 107c at the bottom of the locking block 107b.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A purification device for low-concentration, high-volume exhaust air, characterized in that: The system includes a purification chamber body (100), a main pipe (200) connected to the air inlet of the purification chamber body (100), a fan (300) located at the air outlet of the purification chamber body (100), and a PLC controller (500). The air inlet of the main pipe (200) is connected to several branch pipes (201), and each of the branch pipes (201) is provided with a first air valve control component (400). The purification chamber body (100) is equipped with multiple purification components. The fan (300) is electrically connected to a frequency converter (301), the frequency converter (301) is electrically connected to the PLC controller (500), and the PLC controller (500) is electrically connected to a display screen (501).

2. The purification device for low-concentration, high-volume exhaust air as described in claim 1, characterized in that: The purification box body (100) has a first partition (101) and a second partition (102) spaced apart on both sides. The first partition (101), the second partition (102), and the inner wall of the purification box body (100) are divided into multiple ventilation chambers (104) by a number of partitions (103) at equal intervals. The first partition (101) and the second partition (102) are respectively provided with air inlet (101a) and air outlet (102a) at positions corresponding to the ventilation chambers (104).

3. A purification device for low-concentration, high-volume exhaust air as described in claim 2, characterized in that: The purification assembly includes an activated carbon assembly (105) disposed in the ventilation chamber (104) and a second air valve control assembly (106) disposed at the air inlet (101a).

4. A purification device for low-concentration, high-volume exhaust air as described in claim 1, characterized in that: The first air valve control assembly (400) includes a control panel (401), a first switch controller (402), and a first air valve (403) that are electrically connected in sequence. The first air valve (403) is located at the air inlet of the branch pipe (201). The first switch controller (402) is electrically connected to the PLC controller (500).

5. A purification device for low-concentration, high-volume exhaust air as described in claim 3, characterized in that: The second air valve control assembly (106) includes a second switch controller (106a) and a timer that are electrically connected to the second air valve (106b), the second air valve (106b) being located at the air inlet (101a), and the second switch controller (106a) and the timer being connected to the PLC controller (500).

6. A purification device for low-concentration, high-volume exhaust air as described in claim 1, characterized in that: The main tube (200) is equipped with a wind pressure sensor (202), which is electrically connected to the PLC controller (500).

7. A purification device for low-concentration, high-volume exhaust air as described in claim 1, characterized in that: The purification box body (100) has a material exchange port (100a) at the top, and a sealing cover (107) is hinged to the material exchange port (100a). The sealing cover (107) is also provided with a handle (107d).

8. A purification device for low-concentration, high-volume exhaust air as described in claim 7, characterized in that: A snap-fit ​​plate (107a) is rotatably provided on one side of the top of the sealing cover (107), and a snap-fit ​​block (107b) is provided on the side of the top of the purification box body (100) near the sealing cover (107). A notch (107c) adapted to the snap-fit ​​plate (107a) is opened at the bottom of the snap-fit ​​block (107b).

9. A purification device for low-concentration, high-volume exhaust air as described in claim 3, characterized in that: The activated carbon assembly (105) includes a mounting frame (105a), with through holes (105b) evenly distributed on the front and rear walls of the mounting frame (105a). The width of the mounting frame (105a) is equal to the width of the ventilation chamber (104), and activated carbon is placed inside the mounting frame (105a).

Images