A filter structure for laboratory wastewater treatment

Abstract

The present invention is applicable to the technical field of wastewater treatment, and provides a filtering structure for laboratory wastewater treatment, the filtering structure comprising: a filtering chamber, a filter screen is installed in the filtering chamber; a neutralizing chamber, the neutralizing chamber is connected to the filtering chamber through a feeding channel, a feeding port is installed on one side of the neutralizing chamber, and the other side of the neutralizing chamber is connected to the material chamber through a feeding pipe; a stirring paddle; a heat-driven speed regulating mechanism, which adjusts the rotation speed of the stirring paddle while adjusting the feeding speed of the feeding pipe; the heat-driven speed regulating mechanism comprises: a feeding speed control component, which is connected between the neutralizing chamber and the feeding pipe, and converts the heat generated in the neutralizing chamber into a driving force to squeeze the feeding pipe; an adjustable speed stirring component, which is connected between the feeding speed control component and the stirring paddle, and transmits the driving force of the feeding speed control component to the stirring paddle. The present invention is provided with a heat-driven speed regulating mechanism, which adjusts the feeding speed and the stirring speed, reduces the reaction speed, and eliminates safety hazards.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a filtering structure for laboratory wastewater treatment. Background Art

[0002] Laboratory wastewater is mainly comprehensive wastewater generated by drugs, pharmaceuticals, test solutions and instrument cleaning. Due to the complex composition of wastewater, improper disposal directly discharged into the water body will affect human life and health through the food chain, and will also have a certain impact on the ecological environment.

[0003] Filtration is a common wastewater treatment process. Before filtration, the wastewater generally needs to be neutralized to prevent the acidity or alkalinity of the wastewater from corroding the filter, pipes, etc. Heat is often generated during the neutralization process, and the heat is dissipated through the outer wall of the reactor. The danger is smaller when the heat is low, but if the neutralization reaction speed is not controlled, the heat will increase sharply in a short period of time, causing the outer wall of the reactor to heat up rapidly, which poses a safety hazard to the staff during operation. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a filtering structure for laboratory wastewater treatment, aiming to solve the problems existing in the above-mentioned background technology.

[0005] The embodiment of the present invention is implemented as follows: a filter structure for laboratory wastewater treatment, the filter structure comprising:

[0006] A filter cavity, wherein a filter screen is installed in the filter cavity;

[0007] A neutralization chamber, wherein the neutralization chamber is connected to the filter chamber through a feed channel, a feed port is installed on one side of the neutralization chamber, and the other side of the neutralization chamber is connected to the material chamber through a feed pipe;

[0008] A stirring paddle is installed in the neutralization chamber; and further comprises:

[0009] The heat-driven speed regulating mechanism is installed on the neutralization chamber and is connected to the feeding pipe and the stirring paddle respectively, so as to adjust the feeding speed of the feeding pipe and the rotation speed of the stirring paddle at the same time;

[0010] Wherein, the heat driven speed regulating mechanism comprises:

[0011] The material discharge speed control component is installed on the neutralization chamber and connected between the neutralization chamber and the material discharge pipe. The heat generated in the neutralization chamber is converted into a driving force to squeeze the material discharge pipe, so as to adjust the material discharge speed of the material discharge pipe.

[0012] The adjustable speed stirring assembly is installed on the neutralization chamber and connected between the material feeding speed control assembly and the stirring paddle, and transmits the driving force of the material feeding speed control assembly to the stirring paddle to adjust the rotation speed of the stirring paddle.

[0013] A filter structure for laboratory wastewater treatment provided by an embodiment of the present invention is provided with a heat-driven speed regulating mechanism for addressing the problem that the neutralization reaction of wastewater before filtration in the prior art is an exothermic process and there are potential safety hazards. The heat-driven speed regulating mechanism is driven based on the heat dissipated from the neutralization chamber. Specifically, during operation, wastewater is added to the neutralization chamber through a feed inlet, and the amount of material participating in the neutralization reaction is determined according to the amount of wastewater, and added to the material chamber. The material flows into the neutralization chamber through a feed pipe, and stirring the material by a stirring paddle helps the neutralization reaction. The heat generated in the neutralization chamber causes the feed pipe to be squeezed by a feed control component in the heat-driven speed regulating mechanism, thereby adjusting the speed at which the material flows through the feed pipe. The adjustable speed stirring component in the heat-driven speed regulating mechanism adjusts the rotation speed of the stirring paddle, thereby reducing the reaction speed and preventing a large amount of heat from being released in a short time, thereby eliminating potential safety hazards. After the neutralization reaction is completed, the material in the neutralization chamber flows into the filter chamber through a feed channel, and is filtered through a filter net before subsequent purification treatment or direct discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a filter structure for laboratory wastewater treatment provided by an embodiment of the present invention;

[0015] Figure 2 A schematic diagram of the structure of an air cavity in a filter structure for laboratory wastewater treatment provided by an embodiment of the present invention;

[0016] Figure 3 A schematic diagram of the structure of a material feeding and speed control component in a filtration structure for laboratory wastewater treatment provided by an embodiment of the present invention;

[0017] Figure 4 A schematic diagram of the structure of an adjustable speed stirring assembly in a filtration structure for laboratory wastewater treatment provided by an embodiment of the present invention;

[0018] Figure 5 A schematic structural diagram of a gravity-type energizing component in a filtration structure for laboratory wastewater treatment provided by an embodiment of the present invention.

[0019] In the attached figure: 1-filter chamber; 2-filter screen; 3-neutralization chamber; 4-feeding channel; 5-feeding port; 6-material chamber; 7-feeding pipe; 8-heat dissipation hole; 9-air chamber; 10-air pressure pipe; 11-piston; 12-moving rod; 13-rack; 14-gear; 15-push-pull rod; 16-driving device; 17-mounting frame; 18-stirring paddle; 19-first self-rotating gear; 20-second self-rotating gear; 21- The first speed regulating gear; 22-the second speed regulating gear; 23-pull plate; 24-connecting plate; 25-push plate; 26-fixed frame; 27-elastic member; 28-moving contact; 29-static contact; 30-solenoid valve; 31-driving extrusion assembly; 32-feeding speed control assembly; 33-speed regulating assembly; 34-adjustable speed stirring assembly; 35-heat driven speed regulating mechanism; 36-gravity power supply assembly; 37-automatic switch mechanism. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0022] like Figure 1 FIG. 1 is a structural diagram of a filter structure for treating laboratory wastewater provided by an embodiment of the present invention, wherein the filter structure comprises:

[0023] A filter chamber 1, wherein a filter screen 2 is installed in the filter chamber 1;

[0024] A neutralization chamber 3, wherein the neutralization chamber 3 is connected to the filter chamber 1 through a feed channel 4, a feed port 5 is installed on one side of the neutralization chamber 3, and the other side of the neutralization chamber 3 is connected to the material chamber 6 through a feed pipe 7;

[0025] A stirring paddle 18 is installed in the neutralization chamber 3; and further includes:

[0026] The heat-driven speed regulating mechanism 35 is installed on the neutralization chamber 3 and is connected to the feeding pipe 7 and the stirring paddle 18 respectively, so as to adjust the feeding speed of the feeding pipe 7 and the rotation speed of the stirring paddle 18 at the same time;

[0027] Wherein, the heat driven speed regulating mechanism 35 comprises:

[0028] The material discharge speed control component 32 is installed on the neutralization chamber 3 and connected between the neutralization chamber 3 and the material discharge pipe 7. The heat generated in the neutralization chamber 3 is converted into a driving force to squeeze the material discharge pipe 7, so as to adjust the material discharge speed of the material discharge pipe 7;

[0029] The adjustable speed stirring assembly 34 is installed on the neutralization chamber 3 and connected between the material feeding speed control assembly 32 and the stirring paddle 18 to transmit the driving force of the material feeding speed control assembly 32 to the stirring paddle 18 for adjusting the rotation speed of the stirring paddle 18 .

[0030] In one embodiment of the present invention, the laboratory wastewater treatment filtering structure is provided with a heat-driven speed regulating mechanism 35 to solve the problem that the neutralization reaction of wastewater before filtration is an exothermic process in the prior art, which has potential safety hazards. The heat-driven speed regulating mechanism 35 is driven based on the heat dissipated from the neutralization chamber 3. Specifically, during operation, wastewater is added to the neutralization chamber 3 through the feed port 5, and the amount of material participating in the neutralization reaction is determined according to the amount of wastewater, and is added to the material chamber 6. The material flows into the neutralization chamber 3 through the feed pipe 7, and the material is stirred by the stirring paddle 18 to facilitate the neutralization reaction. The neutralization chamber 3 generates The heat can drive the material discharge speed control component 32 in the heat-driven speed regulating mechanism 35 to extrude the material discharge pipe 7, and then adjust the speed of the material flowing through the material discharge pipe 7. The adjustable speed stirring component 34 in the heat-driven speed regulating mechanism 35 adjusts the rotation speed of the stirring paddle 18, thereby reducing the reaction speed and preventing a large amount of heat from being released in a short time, so that the outer wall of the neutralization chamber 3 has sufficient time to dissipate heat, thereby eliminating safety hazards. After the neutralization reaction is completed, the material in the neutralization chamber 3 flows into the filter chamber 1 through the material discharge channel 4, and is filtered through the filter mesh 2 before subsequent purification treatment or direct discharge.

[0031] like Figures 2 to 3 As shown, as a preferred embodiment of the present invention, the material feeding speed control component 32 includes:

[0032] An air cavity 9 is installed on the neutralization cavity 3, and the air cavity 9 is connected with the heat dissipation hole 8 opened on the neutralization cavity 3;

[0033] The air pressure tube 10 is connected with the air cavity 9, a piston 11 is installed in the air pressure tube 10, and a moving rod 12 is installed on the piston 11, which heats the air in the air cavity 9 by the heat generated in the neutralization cavity 3, and pushes the piston 11 and the moving rod 12 to move in the air pressure tube 10;

[0034] The driving extrusion assembly 31 is installed on the moving rod 12 and connected to the feeding tube 7 . The moving rod 12 transmits the driving force to the driving extrusion assembly 31 to extrude the feeding tube 7 , so as to adjust the feeding speed of the feeding tube 7 .

[0035] When heat is generated in the neutralization chamber 3, the heat is dissipated through the air chamber 9, heating the air in the air pressure tube 10. The air expands due to the heat, and the air pressure increases, driving the piston 11 and the moving rod 12 to move upward in the air pressure tube 10. The material discharge speed control component 32 includes a rack 13, a gear 14 and a push-pull rod 15. The rack 13 is fixed to one side of the moving rod 12, and the gear 14 is continuously meshed with the rack 13. One end of the push-pull rod 15 is hingedly connected to the edge of the gear 14, and the other end of the push-pull rod 15 is hingedly connected to one side of the discharge tube 7. The side of the discharge tube 7 connected to the push-pull rod 15 is retractable. When the rack 13 follows the moving rod 12 to rise, it drives the gear 14 to rotate. During the rotation, the gear 14 drives the push-pull rod 15 to push outward, thereby squeezing the feeding pipe 7, driving one side of the feeding pipe 7 to be squeezed toward the other side, and the channel in the feeding pipe 7 becomes smaller, thereby reducing the feeding speed of the material in the material chamber 6, thereby reducing the neutralization reaction speed in the neutralization chamber 3 and reducing the heat release speed; in addition, the driving extrusion component 31 can also be a combination of two sets of racks and one gear, which changes the vertical movement of the moving rod 12 into a lateral movement to extrude the feeding pipe 7.

[0036] like Figure 4 As shown, as another preferred embodiment of the present invention, the adjustable speed stirring assembly 34 includes:

[0037] A driving device 16, mounted on the neutralization chamber 3;

[0038] A mounting frame 17 is located in the neutralization chamber 3, one end of the mounting frame 17 is connected to the output shaft of the driving device 16, and the other end of the mounting frame 17 is connected to the stirring paddle 18. When the mounting frame 17 rotates, the stirring paddle 18 is driven to revolve;

[0039] The first self-rotating gear 19 and the second self-rotating gear 20 are respectively fixedly connected to the stirring paddle 18;

[0040] The speed regulating assembly 33 is connected to the moving rod 12 . When the moving rod 12 moves, the driving force is transmitted to the speed regulating assembly 33 , driving the speed regulating assembly 33 to engage with the first self-rotating gear 19 or the second self-rotating gear 20 , so as to adjust the self-rotation speed of the stirring paddle 18 .

[0041] The driving device 16 can be a servo motor or a pneumatic motor. In order to drive the wastewater and the material to mix evenly, the driving device 16 is started. The driving device 16 drives the mounting frame 17 to rotate, and then drives the stirring paddle 18 to revolve in the neutralization chamber 3. At the same time, a first self-rotating gear 19 and a second self-rotating gear 20 are arranged on the stirring paddle 18. When the stirring paddle 18 revolves, it drives the first self-rotating gear 19 and the second self-rotating gear 20 to rotate. When the first self-rotating gear 19 or the second self-rotating gear 20 is engaged with the speed regulating component 33, the stirring paddle 18 can be driven to rotate, and the rotation speeds are different, so the stirring speed of the stirring paddle 18 for the material can be controlled.

[0042] like Figure 4 As shown, as a preferred embodiment of the present invention, the speed regulating component 33 includes:

[0043] A first speed regulating gear 21 and a second speed regulating gear 22, wherein the first speed regulating gear 21 and the second speed regulating gear 22 are fixedly connected, and the first speed regulating gear 21 and the second speed regulating gear 22 are movably mounted on the output shaft of the driving device 16;

[0044] A pull plate 23 connected to the second speed regulating gear 22;

[0045] A connecting plate 24, one end of which is connected to the pulling plate 23, and the other end of which is connected to the pushing plate 25 installed on the moving rod 12. The connecting plate 24 transmits the driving force of the moving rod 12 to the pulling plate 23, driving the first speed regulating gear 21 and the second speed regulating gear 22 to move as a whole, controlling the first speed regulating gear 21 to mesh with the first self-rotating gear 19 or controlling the second speed regulating gear 22 to mesh with the second self-rotating gear 20, so as to adjust the self-rotation speed of the stirring paddle 18.

[0046] The first speed regulating gear 21 and the second speed regulating gear 22 are fixed together and sleeved on the output shaft of the driving device 16. When the second speed regulating gear 22 is meshed with the second self-rotating gear 20, the stirring paddle 18 can be driven to rotate at one speed. When the first speed regulating gear 21 is meshed with the first self-rotating gear 19, the stirring paddle 18 can be driven to rotate at another speed. When the moving rod 12 rises, it drives the push plate 25 to rise. The push plate 25 applies thrust to the connecting plate 24, and the connecting plate 24 transmits the thrust to the pull plate 23, thereby driving the first speed regulating gear 21 and the second speed regulating gear 22 to move as a whole, and then the rotation speed of the stirring paddle 18 can be switched, thereby reducing the neutralization reaction; in addition, the speed regulating component 33 can also be set as an adjustable speed motor, and is connected to the driving of the stirring paddle 18, and the rotation speed of the stirring paddle 18 can be adjusted as needed.

[0047] like Figure 1As shown, as a preferred embodiment of the present invention, the filtering structure also includes an automatic switching mechanism 37, which is installed on the feed channel 4 and connected to the material chamber 6. The automatic switching mechanism 37 controls the opening and closing state of the feed channel 4 under the change of gravity of the material chamber 6.

[0048] In order to improve the degree of automation of filtration, an automatic switch mechanism 37 is provided to control the opening and closing of the material discharge channel 4 according to the amount of material in the material chamber 6 .

[0049] like Figure 1 As shown, as a preferred embodiment of the present invention, the automatic switch mechanism 37 includes:

[0050] The solenoid valve 30 is installed on the material discharge channel 4. When the solenoid valve 30 is powered on, the material discharge channel 4 is controlled to be in an open state. When the solenoid valve 30 is powered off, the material discharge channel 4 is controlled to be in a closed state.

[0051] The gravity-type power supply component 36 is installed on the material chamber 6 and is electrically connected to the solenoid valve 30. The material chamber 6 performs a lifting process under the change of gravity, which is used to switch the power on and off state.

[0052] During operation, the material is put into the material chamber 6. As the neutralization reaction proceeds, the material in the material chamber 6 gradually decreases, thereby driving the material chamber 6 to move up and down. The gravity-type power-on component 36 is powered on or off during the lifting process of the material chamber 6. At the same time, the gravity-type power-on component 36 is connected to the solenoid valve 30. When the gravity-type power-on component 36 is powered on, the solenoid valve 30 is powered on to control the discharge channel 4 to be in an open state. When the gravity-type power-on component 36 is powered off, the solenoid valve 30 is powered off to control the discharge channel 4 to be in a closed state.

[0053] like Figure 5 As shown, as a preferred embodiment of the present invention, the gravity-type power supply component 36 includes:

[0054] A fixing frame 26, wherein the fixing frame 26 is fixedly mounted on the upper side of the neutralization chamber 3, and the material chamber 6 is movably connected to the fixing frame 26 via an elastic member 27;

[0055] A moving contact 28 is mounted on the material chamber 6;

[0056] The static contact 29 is fixedly mounted on the upper side of the material chamber 6. The material chamber 6 is lifted and lowered under the change of gravity, driving the moving contact 28 to contact or separate with the static contact 29, so as to control the solenoid valve 30 to be energized or de-energized.

[0057] The position of the fixing frame 26 is fixed, and the material is added into the material chamber 6. The material chamber 6 moves downward under the action of the gravity of the material, and the elastic member 27 is compressed. The elastic member 27 can be a spring or a metal spring, etc. At this time, the static contact 29 and the moving contact 28 are separated (the moving contact 28 and the static contact 29 are structures in the contactor, and the other structures and working principles of the contactor belong to the conventional technical content in this field and are not repeated here). The gravity-type power-on component 36 is not connected to the power supply. When all the materials in the material chamber 6 are discharged, the neutralization reaction is completed, and the material chamber 6 rises under the action of the elastic member 27. The moving contact 28 contacts the static contact 29, and the gravity-type power-on component 36 can be connected to the power supply. The solenoid valve 30 is energized to drive the discharge channel 4 to open, and the material in the neutralization chamber 3 can be discharged for filtration; in addition, the gravity-type power-on component 36 can also be set as a pressure sensor, and is installed on the fixing frame 26, in contact with the material chamber 6, and the switch of the solenoid valve 30 is controlled according to the pressure information received by the pressure sensor.

[0058] Working principle: In the filter structure for laboratory wastewater treatment, when heat is generated in the neutralization chamber 3, the air in the air pressure tube 10 is heated, and the air expands due to the heat, driving the piston 11 and the moving rod 12 to move upward in the air pressure tube 10. The material discharge speed control component 32 includes a rack 13, a gear 14 and a push-pull rod 15. When the rack 13 follows the moving rod 12 to rise, it drives the gear 14 to rotate. During the rotation process, the gear 14 drives the push-pull rod 15 to push outward, thereby squeezing the discharge tube 7, reducing the feeding speed of the material in the material chamber 6; in addition, the driving extrusion component 31 can also be a combination of two sets of racks and one gear;

[0059] The driving device 16 can be a servo motor or a pneumatic motor. The driving device 16 drives the mounting frame 17 to rotate, and drives the stirring paddle 18 to revolve in the neutralization chamber 3. The stirring paddle 18 drives the first self-rotating gear 19 and the second self-rotating gear 20 to rotate when revolving. When the first self-rotating gear 19 or the second self-rotating gear 20 is engaged with the speed regulating component 33, the stirring paddle 18 can be driven to rotate. When the moving rod 12 rises, it drives the push plate 25 to rise. The push plate 25 applies thrust to the connecting plate 24, driving the first speed regulating gear 21 and the second speed regulating gear 22 to move as a whole, thereby switching the rotation speed of the stirring paddle 18. In addition, the speed regulating component 33 can also be set as an adjustable speed motor.

[0060] The material chamber 6 moves downward under the action of the gravity of the material, and the elastic member 27 is compressed. The elastic member 27 can be a spring or a metal spring, etc. At this time, the static contact 29 and the moving contact 28 are separated, and the gravity-type power-on component 36 is not connected to the power supply. When all the materials in the material chamber 6 are discharged, the neutralization reaction is completed, and the material chamber 6 rises under the action of the elastic member 27. The moving contact 28 contacts the static contact 29, and the gravity-type power-on component 36 can be connected to the power supply. The solenoid valve 30 is energized to drive the discharge channel 4 to open, and the material in the neutralization chamber 3 can be discharged for filtration; in addition, the gravity-type power-on component 36 can also be set as a pressure sensor to control the switch of the solenoid valve 30 according to the pressure information received by the pressure sensor.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A filter structure for laboratory wastewater treatment, the filter structure comprising: A filter cavity, wherein a filter screen is installed in the filter cavity; A neutralization chamber, wherein the neutralization chamber is connected to the filter chamber through a feed channel, a feed port is installed on one side of the neutralization chamber, and the other side of the neutralization chamber is connected to the material chamber through a feed pipe; A stirring paddle is installed in the neutralization chamber; characterized in that it also includes: The heat-driven speed regulating mechanism is installed on the neutralization chamber and is connected to the feeding pipe and the stirring paddle respectively, so as to adjust the feeding speed of the feeding pipe and the rotation speed of the stirring paddle at the same time; Wherein, the heat driven speed regulating mechanism comprises: The material discharge speed control component is installed on the neutralization chamber and connected between the neutralization chamber and the material discharge pipe. The heat generated in the neutralization chamber is converted into a driving force to squeeze the material discharge pipe, so as to adjust the material discharge speed of the material discharge pipe. The adjustable speed stirring assembly is installed on the neutralization chamber, connected between the material feeding speed control assembly and the stirring paddle, and transmits the driving force of the material feeding speed control assembly to the stirring paddle, so as to adjust the rotation speed of the stirring paddle; The material feeding speed control component comprises: An air cavity is installed on the neutralization cavity, and the air cavity is connected with the heat dissipation hole opened on the neutralization cavity; An air pressure tube is connected to the air cavity, a piston is installed in the air pressure tube, and a moving rod is installed on the piston, which heats the air in the air cavity by neutralizing the heat generated in the cavity, and pushes the piston and the moving rod to move in the air pressure tube; A driving extrusion assembly is installed on the moving rod and connected to the feeding tube. The moving rod transmits the driving force to the driving extrusion assembly to extrude the feeding tube, so as to adjust the feeding speed of the feeding tube. The driving extrusion assembly includes a rack, a gear and a push-pull rod, the rack is fixed on one side of the moving rod, the gear is continuously meshed with the rack, one end of the push-pull rod is hingedly connected to the edge of the gear, and the other end of the push-pull rod is hingedly connected to one side of the feeding tube, and the side of the feeding tube connected to the push-pull rod is a retractable and deformable material; The adjustable speed stirring assembly comprises: A driving device, mounted on the neutralization chamber; A mounting frame is located in the neutralization chamber, one end of the mounting frame is connected to the output shaft of the driving device, and the other end of the mounting frame is connected to the stirring paddle, and when the mounting frame rotates, the stirring paddle is driven to revolve; The first self-rotating gear and the second self-rotating gear are respectively fixedly connected to the stirring paddle; The speed regulating assembly is connected to the moving rod. When the moving rod moves, the moving rod transmits the driving force to the speed regulating assembly, driving the speed regulating assembly to mesh with the first self-rotating gear or the second self-rotating gear, so as to adjust the self-rotation speed of the stirring paddle.

2. The filtration structure for laboratory wastewater treatment according to claim 1, characterized in that: The speed regulating component comprises: a first speed regulating gear and a second speed regulating gear, wherein the first speed regulating gear and the second speed regulating gear are fixedly connected, and the first speed regulating gear and the second speed regulating gear are movably mounted on the output shaft of the driving device; A pull plate connected to the second speed regulating gear; A connecting plate, one end of which is connected to the pulling plate, and the other end of which is connected to the pushing plate installed on the moving rod. The connecting plate transmits the driving force of the moving rod to the pulling plate, driving the first speed regulating gear and the second speed regulating gear to move as a whole, controlling the first speed regulating gear to mesh with the first self-rotating gear or controlling the second speed regulating gear to mesh with the second self-rotating gear, so as to adjust the self-rotation speed of the agitator.

3. The filtration structure for laboratory wastewater treatment according to claim 1, characterized in that: The filtering structure also includes an automatic switch mechanism, which is installed on the material discharge channel and connected to the material chamber. The automatic switch mechanism controls the opening and closing state of the material discharge channel under the change of gravity of the material chamber.

4. The filtration structure for laboratory wastewater treatment according to claim 3, characterized in that: The automatic switch mechanism comprises: A solenoid valve is installed on the material discharge channel. When the solenoid valve is powered on, the material discharge channel is controlled to be in an open state. When the solenoid valve is powered off, the material discharge channel is controlled to be in a closed state. The gravity-type power-on component is installed on the material chamber and is electrically connected to the solenoid valve. The material chamber performs a lifting process under the change of gravity and is used to switch the power-on and power-off states.

5. The filtration structure for laboratory wastewater treatment according to claim 4, characterized in that: The gravity-type energizing component comprises: A fixing frame, wherein the fixing frame is fixedly mounted on the upper side of the neutralization chamber, and the material chamber is movably connected to the fixing frame via an elastic member; A moving contact is mounted on the material cavity; The static contact is fixedly installed on the upper side of the material chamber. The material chamber is lifted and lowered under the change of gravity, driving the moving contact to contact or separate with the static contact, so as to control the solenoid valve to be powered on or off.

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