A laboratory fume hood with exhaust gas pretreatment function

Abstract

The utility model relates to a fume hood technical field discloses a laboratory fume hood with waste gas pretreatment function, including fume hood body, fume hood body upper end's inside is provided with air pump, still including spray tank, water guide pipe and buffer board, spray tank installs above fume hood body rear side, the utility model discloses through air pump and air outlet pipe can draw the acid mist and alkali mist of fume hood body inside to spray tank, through the water injection pipe guide into the connecting groove in the spray water, through water guide pipe guide into the water guide groove inside buffer board, finally through the water jet nozzle of buffer board outside spouts, thereby to the air outlet pipe discharge acid mist and alkali mist and handle, through the buffer board even installation in the outside of water guide pipe, water guide pipe and spray tank rotatory joint, the air flow of air pump discharge can promote buffer board rotation, thereby slow down gas flow rate, further improve the processing effect of spray water to acid mist and alkali mist.

Description

Technical Field

[0001] This utility model relates to the field of fume hood technology, specifically a laboratory fume hood with exhaust gas pretreatment function. Background Technology

[0002] A fume hood, also known as a smoke hood or fume hood, is a large piece of equipment in laboratories, especially chemical laboratories, used to reduce the exposure of experimenters to harmful gases.

[0003] According to the publication number CN212370785U, a laboratory fume hood with exhaust gas treatment function is disclosed. It achieves the purpose of exhaust gas treatment function through the cooperation of a first box, a bracket, a second box, an air collection hood, a partition, an air pump, a slot, a filter screen, an ESP filter plate, an RCD two-in-one filter plate, a HEPA filter plate and an insert plate.

[0004] In the process of realizing this utility model, the inventors discovered that at least the following problems in the prior art have not been solved: the above-mentioned cases cannot pre-treat the acid mist and alkali mist generated in the experiment during use, and the gas flow rate discharged by the air pump is very fast, which is not conducive to the purification of harmful gases.

[0005] Therefore, we propose a laboratory fume hood with exhaust gas pretreatment function, which can solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a laboratory fume hood with exhaust gas pretreatment function, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a laboratory fume hood with exhaust gas pretreatment function, comprising a fume hood body, wherein an air pump is provided inside the upper end of the fume hood body, characterized in that it further comprises a spray box, a water pipe, a liquid pump and a buffer plate;

[0008] The spray box is installed above the rear side of the fume hood body, the water guide pipe is rotatably connected to the inner walls on both sides of the spray box through a sealed bearing, and the buffer plate is evenly installed on the outer side of the water guide pipe.

[0009] The buffer plate has a water guide groove inside, and water nozzles are evenly installed on the outside of the buffer plate. A connecting groove is opened inside one side wall of the spray box, and one end of the water guide pipe is placed inside the connecting groove.

[0010] The air pump's outlet pipe is connected to the upper end of the spray box's interior. An exhaust pipe is installed through the inner wall of the spray box on the side away from the fume hood body. A drain pipe is fixedly installed on the bottom side of the spray box.

[0011] Solenoid valves are installed on both the exhaust pipe and the drain pipe.

[0012] As an optional solution to the technical solution of this application, a smoke sensor and a processor are fixedly installed on the top inner side of the fume hood body, and a protective cover is fixedly installed on the outside of the processor. The data output terminal of the smoke sensor is connected to the data input terminal of the processor, and the signal output terminal of the processor is connected to the signal input terminals of the solenoid valve, the air pump and the liquid pump respectively.

[0013] As an optional solution to the technical solution of this application, the feature is that: the water nozzle is connected to the water guide channel, and the water guide channel is connected to the water guide pipe.

[0014] As an optional solution to the technical solution of this application, a water collection trough is provided on the inner wall of the bottom end of the spray box, and the water collection trough is funnel-shaped.

[0015] As an optional solution to the technical solution of this application, a drain pipe is fixedly installed on the bottom side of the spray box, and the water inlet end of the drain pipe is connected to the bottom end of the water collection tank.

[0016] 1. The beneficial effects of this utility model are as follows: the air pump and the exhaust pipe can draw acid mist and alkali mist from the inside of the fume hood into the spray box, the water injection pipe can guide the spray water into the connecting groove, the water guide pipe can guide the water into the water guide groove inside the buffer plate, and finally spray it out through the spray nozzles on the outside of the buffer plate, thereby treating the acid mist and alkali mist discharged from the exhaust pipe. The buffer plate is evenly installed on the outside of the water guide pipe, and the water guide pipe is rotatably connected to the spray box. The airflow discharged by the air pump can drive the buffer plate to rotate, thereby slowing down the gas flow rate and further improving the treatment effect of the spray water on acid mist and alkali mist.

[0017] 2. The beneficial effects of this utility model are as follows: whenever experimental smoke is generated, the smoke sensor 31 can detect the smoke, the processor 32 issues an instruction, the air pump 11 and the liquid pump 24 operate, and the two sets of solenoid valves 23 close, so that the batch of smoke can be forced into the spray box 12. At the same time, the smoke enters and drives the spray mechanism to rotate. Whenever the smoke disappears, the air pump 11 and the liquid pump 24 close after a set unit time, and the solenoid valves 23 open after a set unit. During this period, the temporarily stored experimental smoke can be repeatedly sprayed by the spray mechanism, so that the smoke is purified more completely. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the spray box structure of a laboratory fume hood with exhaust gas pretreatment function according to the present invention;

[0020] Figure 2This is an internal schematic diagram of a laboratory fume hood with exhaust gas pretreatment function according to the present invention;

[0021] Figure 3 This is a top view of the connection between the buffer plate and the water pipe of a laboratory fume hood with exhaust gas pretreatment function according to this utility model.

[0022] In the diagram: 1. Fume hood body; 11. Air pump; 12. Spray box; 13. Air outlet duct; 14. Water guide pipe; 15. Buffer plate; 16. Water guide trough; 17. Spray nozzle; 18. Exhaust duct; 2. Connecting groove; 21. Water injection pipe; 22. Water collection trough; 23. Drain pipe; 24. Liquid pump; 3. Solenoid valve; 31. Smoke sensor; 32. Processor. Detailed Implementation

[0023] Please see Figures 1-3 This utility model provides a technical solution: a laboratory fume hood with exhaust gas pretreatment function, including a fume hood body 1, an air pump 11 installed inside the upper part of the fume hood body 1, a spray box 12, a water guide pipe 14, and a buffer plate 15. The spray box 12 is installed above the rear side of the fume hood body 1. The air outlet pipe 13 of the air pump 11 is connected to the upper part of the spray box 12. A water guide groove 16 is opened inside the buffer plate 15 and is connected to the water guide pipe 14. The outer side of the buffer plate 15... Evenly installed are spray nozzles 17, which are connected to the water guide trough 16. A connecting groove 2 is opened inside one side wall of the spray box 12. One end of the water guide pipe 14 is placed inside the connecting groove 2. A water injection pipe 21 is fixedly installed on the outside of the spray box 12. The water outlet end of the water injection pipe 21 is connected to the connecting groove 2. An exhaust pipe 18 is installed through the inner wall of the spray box 12 on the side away from the fume hood body 1. A drain pipe 23 is fixedly installed on the bottom side of the spray box 12. Solenoid valves 3 are installed on both the exhaust pipe 18 and the drain pipe 23.

[0024] In this technical solution, the acid mist and alkaline mist inside the fume hood body 1 can be drawn into the spray box 12 by the air pump 11 and the air outlet pipe 13. The spray water is introduced into the connecting groove 2 through the water injection pipe 21, and then into the water guide groove 16 inside the buffer plate 15 through the water guide pipe 14. Finally, it is sprayed out through the spray nozzle 17 on the outside of the buffer plate 15, thereby treating the acid mist and alkaline mist discharged from the air outlet pipe 13. The treated gas is discharged from the spray box 12 through the exhaust pipe 18.

[0025] In this embodiment, a smoke sensor 31 and a processor 32 are fixedly installed on the top inner side of the fume hood body 1, and a protective cover is fixedly installed on the outside of the processor 32. The data output terminal of the smoke sensor 31 is connected to the data input terminal of the processor 32, and the signal output terminal of the processor 32 is connected to the signal input terminals of the solenoid valve 3, the air pump 11 and the liquid pump 24 respectively.

[0026] In this technical solution, whenever experimental smoke is generated, the smoke sensor 31 can detect the smoke, the processor issues an instruction, the air pump and liquid pump run, and the two sets of solenoid valves close, which allows the batch of smoke to be forced into the spray box. At the same time, the smoke enters and drives the spray mechanism to rotate. Whenever the smoke disappears, the air pump 11 and liquid pump 24 close after a set unit time, and the solenoid valve 23 opens after a set unit. During this period, the temporarily stored experimental smoke can be repeatedly sprayed by the spray mechanism to make the smoke purification more complete.

[0027] In this embodiment, the water guide pipe 14 is rotatably connected to the inner walls on both sides of the spray box 12 through a sealed bearing, and the buffer plate 15 is evenly installed on the outer side of the water guide pipe 14.

[0028] In this technical solution, the water guide pipe 14 is rotatably connected to the inner walls on both sides of the spray box 12 through a sealed bearing. The airflow discharged by the air pump 11 can drive the buffer plate 15 on the outside of the water guide pipe 14 to rotate, thereby slowing down the gas flow rate and further improving the treatment effect of the spray water on acid mist and alkali mist.

[0029] In this embodiment, a water collection trough 22 is provided on the inner wall of the bottom end of the spray box 12. The water collection trough 22 is funnel-shaped. A drain pipe 23 is fixedly installed on the bottom side of the spray box 12. The water inlet end of the drain pipe 23 is connected to the bottom end of the water collection trough 22.

[0030] In this technical solution, the water after spraying can be collected by the water collection tank 22 and then discharged through the drain pipe 23.

[0031] When using a laboratory fume hood with exhaust gas pretreatment function: 1. Equipment startup preparation

[0032] Check that all connections of the components of the fume hood body 1 are intact;

[0033] Ensure that there are no obstructions in the spray box 12;

[0034] Check the status of solenoid valve 3 in drain pipe 23 and exhaust pipe 18;

[0035] Confirm that the smoke sensor 31 and processor 32 are in normal working order.

[0036] II. Waste Gas Treatment Process

[0037] After the experiment began, the smoke sensor 31 detected the acid / alkali mist generated during the experiment;

[0038] Processor 32 receives signals and issues instructions:

[0039] Start the air pump 11 to draw the exhaust gas into the spray box 12 through the air outlet pipe 13;

[0040] Start the liquid pump 24 to inject the spray water into the connecting tank 2 through the water injection pipe 21.

[0041] Spray water flow path:

[0042] Connecting groove 2 → Water guide pipe 14 → Water guide groove 16 of buffer plate 15 → Spraying water from nozzle 17

[0043] III. Waste Gas Purification Process

[0044] After the exhaust gas enters the spray box 12:

[0045] The airflow pushes the buffer plate 15 to rotate, slowing down the gas flow rate;

[0046] The water mist sprayed from nozzle 17 fully contacts and reacts with the exhaust gas.

[0047] The purified gas is discharged through exhaust pipe 18;

[0048] The spray wastewater is collected in the water collection tank 22 and then discharged through the drain pipe 23.

[0049] IV. Automatic Control System

[0050] Smoke detection phase:

[0051] When smoke sensor 31 detects smoke;

[0052] Processor 32 controls solenoid valve 3 to close exhaust pipe 18 and drain pipe 23;

[0053] Air pump 11 and liquid pump 24 start working.

[0054] Purification completion stage:

[0055] After the smoke dissipates, the processor 32 delays shutting down the air pump 11 and the liquid pump 24;

[0056] Delay the opening of solenoid valve 3 to discharge the treated gas and wastewater;

[0057] Ensure that the exhaust gas is fully purified.

[0058] V. Equipment Maintenance

[0059] Regular inspections:

[0060] Is nozzle 17 clogged?

[0061] Does the water pipe 14 rotate smoothly?

[0062] Is solenoid valve 3 opening and closing normally?

[0063] Cleaning and maintenance:

[0064] Clean the water collection tank 22 regularly;

[0065] Check that drain pipe 23 is unobstructed;

[0066] System check:

[0067] Testing the sensitivity of smoke sensor 31;

[0068] Verify the control logic of processor 32.

[0069] Precautions

[0070] Before the experiment, ensure that all components of the equipment are functioning properly;

[0071] Change the spray water regularly to ensure purification effect;

[0072] Any abnormal noise or performance degradation should be inspected and repaired promptly.

[0073] When the equipment is not used for a long time, the water in the sprinkler system should be drained.

[0074] This fume hood, through its automated control system and innovative spray structure, achieves effective pretreatment of laboratory exhaust gases, ensuring the safety and environmental friendliness of the experimental environment.

Claims

1. A laboratory fume hood with exhaust gas pretreatment function, comprising a fume hood body (1), wherein an air pump (11) is disposed inside the upper end of the fume hood body (1), characterized in that, It also includes a spray box (12), a water pipe (14), a liquid pump (24), and a buffer plate (15). The spray box (12) is installed above the rear side of the fume hood body (1), the water guide pipe (14) is rotatably connected to the inner walls on both sides of the spray box (12) through a sealed bearing, and the buffer plate (15) is evenly installed on the outside of the water guide pipe (14). The buffer plate (15) has a water guide groove (16) inside, and water nozzles (17) are evenly installed on the outside of the buffer plate (15). A connecting groove (2) is opened inside one side wall of the spray box (12), and one end of the water guide pipe (14) is placed inside the connecting groove (2). The air outlet pipe (13) of the air pump (11) is connected to the upper end of the spray box (12). An exhaust pipe (18) is installed through the inner wall of the spray box (12) on the side away from the fume hood body (1). A drain pipe (23) is fixedly installed on the bottom side of the spray box (12). Solenoid valves (3) are installed on both the exhaust pipe (18) and the drain pipe (23).

2. A laboratory fume hood with exhaust gas pretreatment function according to claim 1, characterized in that: A smoke sensor (31) and a processor (32) are fixedly installed on the top inner side of the fume hood body (1), and a protective cover is fixedly installed on the outside of the processor (32). The data output terminal of the smoke sensor (31) is connected to the data input terminal of the processor (32), and the signal output terminal of the processor (32) is connected to the signal input terminals of the solenoid valve (3), the air pump (11), and the liquid pump (24), respectively.

3. A laboratory fume hood with exhaust gas pretreatment function according to claim 1, characterized in that: The spray nozzle (17) is connected to the water guide channel (16), and the water guide channel (16) is connected to the water guide pipe (14).

4. A laboratory fume hood with exhaust gas pretreatment function according to claim 1, characterized in that: The bottom inner wall of the spray box (12) is provided with a water collection trough (22), which is funnel-shaped.

5. A laboratory fume hood with exhaust gas pretreatment function according to claim 1, characterized in that: The inlet end of the drain pipe (23) is connected to the bottom end of the water collection tank (22).

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