A waste gas treatment device for laboratory

Abstract

The present invention discloses a waste gas treatment device for laboratory use, specifically relates to the technical field of waste gas treatment devices, including a waste gas treatment tank; a movable filter plate, the movable filter plate freely slides up and down in the waste gas treatment tank, and a filler storage cavity for storing reaction fillers is formed between two movable filter plates; a filler supplement component provided on the waste gas treatment tank; and an air pressure regulating component provided on the waste gas treatment tank. By providing the air pressure regulating component, when the waste gas flow rate entering the waste gas treatment tank is large, the air pressure regulating component will drive the two movable filter plates to move relatively away from each other, so that the longitudinal spacing between the two movable filter plates increases, thereby increasing the volume of the filler storage cavity, and at the same time, the filler supplement component will supplement the reaction filler into the filler storage cavity after the volume is increased, so that the amount of reaction filler participating in the oxidation-reduction treatment of the waste gas is increased, and then the reserve of the reaction filler participating in the reaction can be adjusted in real time according to the delivery flow rate of the waste gas, thereby improving the waste gas treatment efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment devices, and more specifically, to a waste gas treatment device for a laboratory. Background Art

[0002] The chemical laboratory is an important place that provides conditions for chemical experiments and conducts scientific research. It contains a large number of instruments: iron stands, asbestos nets, alcohol lamps and other experimental tools. It is usually equipped with a chemical cabinet, which contains commonly used chemicals, such as copper sulfate pentahydrate (CuSO4·5H2O, also known as copper sulfate), sodium hydroxide solution, limestone, hydrochloric acid, etc. People use them to study the mysteries of substances and their changes.

[0003] When the laboratory is conducting experiments, especially large-scale experiments, the waste gas generated during the experiment needs to be treated before it can be discharged. When the waste gas is treated, it is necessary to operate with the help of a waste gas treatment device. The reaction filler in the waste gas treatment device produces an oxidation-reduction reaction on the waste gas, so that harmful substances in the waste gas are oxidized and reduced to produce harmless substances. However, since the waste gas delivery flow rate is unstable when the waste gas is transported to the waste gas treatment device, when the waste gas delivery flow rate is large, the waste gas treatment efficiency of the reaction filler is reduced, causing the waste gas that has not been oxidized and reduced in time to overflow. When the waste gas delivery flow rate is small, if the reaction filler reserve is large, the air permeability of the reaction filler is reduced, which will cause the efficiency of the waste gas output from the reaction filler to be reduced, affecting the collection of the waste gas after treatment. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a laboratory waste gas treatment device. The technical problem to be solved by the present invention is that the waste gas treatment device in the prior art cannot actively adjust the reserve of the reaction filler participating in the redox reaction according to the change of the waste gas delivery flow rate.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A laboratory waste gas treatment device, comprising:

[0007] An exhaust gas treatment tank, wherein the upper and lower ends of the exhaust gas treatment tank are respectively provided with an air inlet and an air outlet;

[0008] A movable filter plate engaged with the exhaust gas treatment tank, wherein the two movable filter plates slide freely up and down in the exhaust gas treatment tank, and a filler storage cavity for storing reaction fillers is formed between the two movable filter plates;

[0009] A filler supplement component provided on the exhaust gas treatment tank;

[0010] An air pressure regulating assembly is arranged on the exhaust gas treatment tank.

[0011] Furthermore, the periphery of the movable filter plate is key-connected to the inner wall of the exhaust gas treatment tank.

[0012] Furthermore, the filler supplement component comprises:

[0013] A storage bin fixedly connected to the outer wall of the exhaust gas treatment tank, wherein the interior of the storage bin is hollow and communicates with the interior of the filler storage cavity, and the storage bin is filled with reactive fillers;

[0014] A movable push plate coaxially engaged with the storage bin, the movable push plate freely sliding horizontally in the storage bin;

[0015] An elastic pushing unit is arranged on the storage bin, and the elastic pushing unit is used to drive the movable pushing plate to move toward the inner side of the exhaust gas treatment tank.

[0016] Furthermore, the elastic pushing unit comprises:

[0017] A push rod coaxially fixed to the movable push plate;

[0018] An end cover installed on the storage bin away from the exhaust gas treatment tank, the end cover being provided with a through hole for the push rod to pass freely;

[0019] A nut fixedly sleeved on one end of the push rod passing through the storage bin;

[0020] A tension spring is sleeved on the push rod, and two ends of the tension spring are respectively fixed to the end surface of the nut and the end surface of the end cover.

[0021] Furthermore, the air pressure regulating assembly comprises:

[0022] A fixed cylinder coaxially fixed to the inner wall of the exhaust gas treatment tank, the upper and lower sides of the fixed cylinder are open and communicate with the inside of the air inlet, and a plurality of air outlet holes in the form of through holes are opened on the periphery of the fixed cylinder;

[0023] A movable plug coaxially engaged with the fixed cylinder, wherein the movable plug freely slides up and down in the fixed cylinder;

[0024] A driving unit is arranged in the exhaust gas treatment tank, and the driving unit is used to drive the two movable filter plates to move relative to each other when the movable plug moves vertically.

[0025] Furthermore, a hollow frame is fixedly connected to the lower opening of the fixed cylinder, a spring is installed between the hollow frame and the movable plug, and two ends of the spring elastic force direction elastically press against the movable plug and the hollow frame respectively.

[0026] Furthermore, the driving unit comprises:

[0027] A driving rod coaxially connected to the exhaust gas treatment tank, two ends of the driving rod respectively pass through the two movable filter plates, and the upper and lower ends of the driving rod are respectively provided with a first thread segment and a second thread segment, and the first thread segment and the second thread segment have opposite thread rotation directions;

[0028] A nut sleeve coaxially fixed to the movable filter plate, wherein the two nut sleeves are respectively threadedly sleeved on the first thread segment and the second thread segment;

[0029] A rotating structure is arranged in the fixed cylinder, and the rotating structure is used to drive the driving rod to rotate when the movable plug moves vertically.

[0030] Furthermore, a mounting frame is coaxially fixed inside the exhaust gas treatment tank, and the driving rod is rotatably connected to the mounting frame.

[0031] Furthermore, the rotating structure comprises:

[0032] A rotating shaft coaxially fixed to the upper end of the driving rod, wherein the upper end of the rotating shaft is rotatably connected to the hollow frame;

[0033] A fixed sleeve is coaxially embedded on the movable plug, the fixed sleeve is slidably mounted on the rotating shaft, and a ball is rotatably embedded in the annular hole wall of the fixed sleeve. A spiral rolling groove for the ball to engage is opened on the periphery of the rotating shaft, and the ball rolls freely in the spiral rolling groove.

[0034] Furthermore, two balls are provided and arranged in an array along the axial direction of the fixing sleeve.

[0035] Technical effects and advantages of the present invention:

[0036] By setting an air pressure regulating component, when the waste gas flow rate entering the waste gas treatment tank is large, the air pressure regulating component will drive the two movable filter plates to be relatively far apart, so that the longitudinal spacing between the two movable filter plates increases, thereby increasing the volume of the filler storage chamber, and at the same time, the filler supplement component will supplement the reaction filler into the filler storage chamber with the increased volume, so that the amount of reaction filler participating in the oxidation-reduction treatment of the waste gas increases, and then the reserve of the reaction filler participating in the reaction can be adjusted in real time according to the waste gas delivery flow rate, thereby improving the waste gas treatment efficiency, and when the waste gas delivery flow rate delivered to the waste gas treatment tank decreases, the air pressure regulating component will drive the two movable filter plates to be relatively close, thereby squeezing the reaction filler in the filler storage chamber into the filler supplement component, thus achieving that when the waste gas delivery flow rate is small, the air permeability efficiency of the reaction filler will not be greatly affected under the premise of ensuring the waste gas treatment efficiency;

[0037] The exhaust gas enters the fixed cylinder and pushes the movable plug to move. When the exhaust gas delivery flow is large, the pushing stroke of the movable plug is proportional. The exhaust gas is sprayed into the exhaust gas treatment tank from the air outlet on the fixed cylinder. The exhaust gas enters the reaction filler from the movable filter plate and produces a redox reaction with the reaction filler. With the change of the exhaust gas delivery volume, the vertical movement stroke of the movable plug changes in direct proportion, thereby causing the relative movement stroke of the two movable filter plates to change in direct proportion.

[0038] Through the vertical movement of the movable plug, the ball on the fixed sleeve can roll in the spiral rolling groove, thereby rotating the drive shaft. When the shaft rotates, the drive rod is driven to rotate. When the drive rod rotates, the first thread segment and the second thread segment are respectively screwed with the two nut sleeve threads, thereby driving the two movable filter plates to move relative to each other. The structure is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic structural diagram of a laboratory waste gas treatment device in the present invention;

[0040] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of;

[0041] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0042] Figure 4 It is a schematic diagram of the structure after the movable filter plate, the driving rod and the rotating shaft are assembled in the present invention;

[0043] Figure 5 for Figure 4 Schematic diagram of the front view angle;

[0044] Figure 6 for Figure 5 A schematic cross-sectional structure diagram of;

[0045] Figure 7 It is a structural schematic diagram of the fixing sleeve in the present invention.

[0046] The accompanying drawings are marked as follows: 1. air inlet; 2. storage bin; 3. push rod; 4. tension spring; 5. nut; 6. end cover; 7. exhaust gas treatment tank; 8. air outlet; 9. driving rod; 10. first threaded section; 11. movable push plate; 12. second threaded section; 13. nut sleeve; 14. mounting frame; 15. movable filter plate; 16. rotating shaft; 17. fixing cylinder; 18. air outlet; 19. spiral rolling groove; 20. movable plug; 21. hollow frame; 22. spring; 23. fixing sleeve; 24. ball bearing. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] like Figure 1-Figure 7 As shown, the present embodiment discloses: a waste gas treatment device for laboratory use, comprising a waste gas treatment tank 7 with an air inlet 1 and an air outlet 8 respectively provided at the upper and lower ends, the waste gas treatment tank 7 is hollow inside, and the air inlet 1 is connected to an external waste gas delivery system through a pipeline, the waste gas delivery system delivers waste gas in a large number of experiments to the air inlet 1, two movable filter plates 15 are clamped in the waste gas treatment tank 7, the two movable filter plates 15 slide freely up and down in the waste gas treatment tank 7, and a stuffing storage cavity for storing reaction stuffing is formed between the two movable filter plates 15, the periphery of the movable filter plate 15 is key-connected with the inner wall of the waste gas treatment tank 7, so that the movable filter plate 15 will not rotate when moving up and down in the waste gas treatment tank 7, the periphery of the waste gas treatment tank 7 is fixedly connected with a storage bin 2, the storage bin 2 is hollow inside and communicates with the inside of the stuffing storage cavity, the storage bin 2 is filled with reaction stuffing, and the reaction stuffing in the storage bin 2 can enter the stuffing storage cavity from the storage bin 2;

[0049] The storage bin 2 is coaxially engaged with a movable push plate 11, which can slide freely horizontally in the storage bin 2. A push rod 3 is coaxially fixedly connected to the movable push plate 11. An end cover 6 is installed at the mouth of the storage bin 2 away from the exhaust gas treatment tank 7. A through hole is provided on the end cover 6 for the push rod 3 to pass freely. A nut 5 is fixedly sleeved on one end of the push rod 3 passing through the storage bin 2. A tension spring 4 is sleeved around the push rod 3. Both ends of the tension spring 4 are respectively fixed to the end faces of the nut 5 and the end faces of the end cover 6. The tension spring 4 generates a pulling force on the nut 5, so that the push rod 3 drives the movable push plate 11 to slide in the storage bin 2, so that the movable push plate 11 generates a thrust on the reaction filler in the storage bin 2 toward the exhaust gas treatment tank 7. In this way, when the volume in the filler storage chamber changes, the reaction filler in the storage bin 2 can be replenished into the filler storage chamber under the thrust of the movable push plate 11. Similarly, when the volume of the filler storage chamber decreases, the reaction filler in the filler storage chamber can enter the storage bin 2.

[0050] A mounting frame 14 is coaxially fixed in the exhaust gas treatment tank 7, and a driving rod 9 is vertically rotatably connected to the mounting frame 14 through a bearing. Two movable filter plates 15 are respectively passed through the two ends of the driving rod 9. The upper and lower ends of the driving rod 9 are respectively provided with a first threaded section 10 and a second threaded section 12. The thread rotation directions of the first threaded section 10 and the second threaded section 12 are opposite. A nut sleeve 13 is coaxially fixed to the movable filter plate 15, and the two nut sleeves 13 are respectively threadedly sleeved on the first threaded section 10 and the second threaded section 12. A fixed cylinder 17 is coaxially fixed to the inner wall of the exhaust gas treatment tank 7. The upper and lower sides of the fixed cylinder 17 are open and connected to the inside of the air inlet 1. A plurality of air outlet holes 18 in the form of through holes are provided on the periphery of the fixed cylinder 17. A movable plug 20 is coaxially engaged in the fixed cylinder 17. The plug 20 slides freely up and down in the fixed cylinder 17. A hollow frame 21 is fixedly connected to the lower side of the fixed cylinder 17. A spring 22 is installed between the hollow frame 21 and the movable plug 20. The two ends of the spring 22 elastically press against the movable plug 20 and the hollow frame 21 respectively. The upper end of the driving rod 9 is coaxially fixedly connected to the rotating shaft 16. The upper end of the rotating shaft 16 is rotatably connected to the hollow frame 21. A fixed sleeve 23 is coaxially embedded on the movable plug 20. The fixed sleeve 23 is slidably mounted on the rotating shaft 16, and a ball 24 is rotatably embedded in the annular hole wall of the fixed sleeve 23. There are two balls 24, which are arranged in an axial array along the fixed sleeve 23. The periphery of the rotating shaft 16 is provided with a spiral rolling groove 19 for the ball 24 to engage. The ball 24 rolls freely in the spiral rolling groove 19.

[0051] After the exhaust gas is transported to the air inlet 1, it will enter the fixed cylinder 17. When the exhaust gas transport pressure is relatively low, the exhaust gas will enter the exhaust gas treatment tank 7 from the multiple air outlet holes 18 located on the upper side of the fixed cylinder 17, and then pass through the movable filter plate 15 to enter the filler storage chamber. The reaction filler in the filler storage chamber performs an oxidation-reduction reaction on the harmful substances in the exhaust gas, and then the exhaust gas is discharged from the lower movable filter plate 15 to the exhaust port 8. When the exhaust gas transport flow rate is relatively large, the exhaust gas cannot be quickly discharged from the air outlet hole 18, and then, under the push of the air pressure, the movable plug 20 will move downward, so that the movable plug 20 drives the rotating shaft 16 to move downward. After the movable plug 20 moves downward, the number of the air outlet holes 18 located above the movable plug 20 increases, so that the exhaust gas can enter the exhaust gas treatment tank 7 from the increased number of air outlet holes 18, and when the movable plug 20 drives the rotating shaft 16 to move downward, the ball 24 on the fixed sleeve 23 rolls in the spiral rolling groove 19 and drives the rotating shaft 16 to rotate. When the rotating shaft 16 rotates, it will synchronously drive the driving rod 9 to rotate. When the driving rod 9 rotates, the two nut sleeves 13 are respectively screwed with the first thread segment 10 and the second thread segment 12, thereby increasing the longitudinal spacing between the two movable filter plates 15, that is, the volume of the stuffing storage chamber is increased. In this way, under the tension of the tension spring 4, the push rod 3 will drive the movable push plate 11 to move toward the exhaust gas treatment tank 7, so that the reaction stuffing in the storage bin 2 is supplemented to the stuffing storage chamber with increased volume, so that the amount of reaction stuffing participating in the reaction is increased. At the same time, when the movable plug 20 moves downward, it will compress the spring 22, and the spring 22 accumulates elastic potential energy. In this way, when the exhaust gas delivery flow rate decreases, the elastic potential energy of the spring 22 is released, thereby driving the movable plug 20 to move upward, so that the rotating shaft 16 moves upward, and can drive the two movable filter plates 15 to approach each other, so that the volume in the stuffing storage chamber is reduced, and the reaction stuffing in the stuffing storage chamber is squeezed into the storage bin 2.

[0052] Working principle of the present invention: after the exhaust gas is transported to the air inlet 1, it will enter the fixed cylinder 17. When the pressure of the exhaust gas transport is relatively low, the exhaust gas will enter the exhaust gas treatment tank 7 from the multiple air outlets 18 located on the upper side of the fixed cylinder 17, and then pass through the movable filter plate 15 to enter the filler storage chamber. The reactive filler in the filler storage chamber performs an oxidation-reduction reaction on the harmful substances in the exhaust gas, and then the exhaust gas is discharged from the lower movable filter plate 15 to the exhaust port 8. When the exhaust gas transport flow rate is relatively large, the exhaust gas cannot be quickly discharged from the air outlet 18, and then Under the push of air pressure, the movable plug 20 will move downward, so that the movable plug 20 drives the rotating shaft 16 to move downward. After the movable plug 20 moves downward, the number of the air outlet holes 18 located above the movable plug 20 increases, so that the exhaust gas can enter the exhaust gas treatment tank 7 from the increased number of air outlet holes 18. When the movable plug 20 drives the rotating shaft 16 to move downward, the ball 24 on the fixed sleeve 23 rolls in the spiral rolling groove 19 and drives the rotating shaft 16 to rotate. When the rotating shaft 16 rotates, it will synchronously drive the driving rod 9 to rotate.

[0053] When the driving rod 9 rotates, the two nut sleeves 13 are respectively threadedly engaged with the first thread segment 10 and the second thread segment 12, thereby increasing the longitudinal spacing between the two movable filter plates 15, that is, the volume of the filler storage chamber is increased. In this way, under the tension of the tension spring 4, the push rod 3 will drive the movable push plate 11 to move toward the exhaust gas treatment tank 7, so that the reaction filler in the storage bin 2 is supplemented to the filler storage chamber with increased volume, so that the amount of reaction filler participating in the reaction is increased. At the same time, when the movable plug 20 moves downward, it will compress the spring 22, and the spring 22 accumulates elastic potential energy. In this way, when the exhaust gas delivery flow rate decreases, the elastic potential energy of the spring 22 is released, thereby driving the movable plug 20 to move upward, so that the rotating shaft 16 moves upward, and can drive the two movable filter plates 15 to approach each other, so that the volume in the filler storage chamber is reduced, and the reaction filler in the filler storage chamber is squeezed into the storage bin 2.

[0054] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0055] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0056] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laboratory waste gas treatment device, characterized in that: include: An exhaust gas treatment tank (7), wherein the exhaust gas treatment tank (7) is provided with an air inlet (1) and an air outlet (8) at the upper and lower ends thereof respectively; A movable filter plate (15) engaged in the waste gas treatment tank (7), wherein the two movable filter plates (15) slide freely up and down in the waste gas treatment tank (7), and a filler storage cavity for storing reaction fillers is formed between the two movable filter plates (15); A filler supplement component provided on the exhaust gas treatment tank (7), the filler supplement component comprising: A storage bin (2) fixedly connected to the outer wall of the exhaust gas treatment tank (7), the storage bin (2) being hollow inside and communicating with the inside of the filler storage cavity, and the storage bin (2) being filled with reactive fillers; A movable push plate (11) coaxially engaged with the storage bin (2), wherein the movable push plate (11) slides freely horizontally in the storage bin (2); an elastic pushing unit provided on the storage bin (2), the elastic pushing unit being used to drive the movable pushing plate (11) to move toward the inner side of the exhaust gas treatment tank (7); An air pressure regulating component is arranged on the exhaust gas treatment tank (7).

2. A laboratory waste gas treatment device according to claim 1, characterized in that: The periphery of the movable filter plate (15) is key-connected to the inner wall of the exhaust gas treatment tank (7).

3. A laboratory waste gas treatment device according to claim 1, characterized in that: The elastic pushing unit comprises: A push rod (3) coaxially fixed to the movable push plate (11); An end cover (6) installed at a side of the storage bin (2) away from the exhaust gas treatment tank (7), the end cover (6) being provided with a through hole for the push rod (3) to pass freely; A nut (5) fixedly sleeved on one end of the push rod (3) passing through the storage bin (2); A tension spring (4) is wound around the push rod (3), and two ends of the tension spring (4) are respectively fixed to the end surface of the nut (5) and the end surface of the end cover (6).

4. A laboratory waste gas treatment device according to claim 1, characterized in that: The gas pressure regulating assembly comprises: A fixed cylinder (17) coaxially fixed to the inner wall of the exhaust gas treatment tank (7), the upper and lower sides of the fixed cylinder (17) being open and communicating with the interior of the air inlet (1), and a plurality of air outlet holes (18) in the form of through holes are formed on the periphery of the fixed cylinder (17); A movable plug (20) coaxially engaged with the fixed cylinder (17), wherein the movable plug (20) is freely slidable up and down in the fixed cylinder (17); A driving unit is arranged in the exhaust gas treatment tank (7), and is used to drive the two movable filter plates (15) to move relative to each other when the movable plug (20) moves vertically.

5. A laboratory waste gas treatment device according to claim 4, characterized in that: A hollow frame (21) is fixedly connected to the lower opening of the fixed cylinder (17), and a spring (22) is installed between the hollow frame (21) and the movable plug (20), and two ends of the spring (22) elastically press against the movable plug (20) and the hollow frame (21) respectively in the elastic force direction.

6. A laboratory waste gas treatment device according to claim 5, characterized in that: The driving unit comprises: A driving rod (9) coaxially rotatably connected to the exhaust gas treatment tank (7), two movable filter plates (15) passing through the two ends of the driving rod (9), a first thread segment (10) and a second thread segment (12) are respectively provided at the upper and lower ends of the driving rod (9), and the first thread segment (10) and the second thread segment (12) have opposite thread rotation directions; A nut sleeve (13) coaxially fixed to the movable filter plate (15), wherein the two nut sleeves (13) are respectively threadedly sleeved on the first thread segment (10) and the second thread segment (12); A rotating structure is arranged in the fixed cylinder (17), and is used to drive the driving rod (9) to rotate when the movable plug (20) moves vertically.

7. A laboratory waste gas treatment device according to claim 6, characterized in that: A mounting frame (14) is coaxially fixedly connected inside the exhaust gas treatment tank (7), and the driving rod (9) is rotatably connected to the mounting frame (14).

8. A laboratory waste gas treatment device according to claim 6, characterized in that: The rotating structure comprises: A rotating shaft (16) coaxially fixed to the upper end of the driving rod (9), wherein the upper end of the rotating shaft (16) is rotatably connected to the hollow frame (21); A fixed sleeve (23) is coaxially mounted on the movable plug (20), the fixed sleeve (23) is slidably mounted on the rotating shaft (16), and a ball (24) is rotatably mounted on the annular hole wall of the fixed sleeve (23), a spiral rolling groove (19) for the ball (24) to engage is formed on the periphery of the rotating shaft (16), and the ball (24) rolls freely in the spiral rolling groove (19).

9. A laboratory waste gas treatment device according to claim 8, characterized in that: The balls (24) are provided in two numbers and are arranged in an array along the axial direction of the fixing sleeve (23).

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