Treatment device for organic solvent recovery wastewater

Abstract

The utility model provides an organic solvent recovery wastewater treatment device which comprises a plurality of aeration tanks, water inlet pipes of the plurality of aeration tanks are connected to a main water inlet pipe through respective water inlet valves, and water outlet pipes of the plurality of aeration tanks are connected to a main water outlet pipe through respective water outlet pumps. The water inlet valve on the water inlet pipe of each aeration tank, the water draining pump on the water draining pipe, the aeration pump on the air inlet and the exhaust valve on the air outlet are all in electric connection and signal connection with a control end and are controlled by the control end to be opened or closed. According to the utility model, the water inlet pipelines and the water outlet pipelines of the plurality of aeration tanks are arranged, and the water inlet valve, the water outlet pump, the aeration pump and the exhaust valve of each aeration tank are controlled by the control end, so that the device can adapt to different scenes, and the plurality of aeration tanks are automatically controlled by the control end, so that the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, and particularly to a treatment device for wastewater from organic solvent recovery. Background Art

[0002] After the existing organic solvents are used, they need to be recycled. The organic wastewater separated therefrom cannot be directly discharged through the industrial sewage pipe network due to its high COD content and needs further treatment. If the treatment is improper, it is likely to cause environmental pollution. Currently, a single aeration tank is used to treat the waste gas. If the aeration tank fails, it cannot be used continuously. If multiple aeration tanks are used to treat the waste gas, the structures of multiple aeration tanks need to be improved and effective control measures need to be taken, otherwise the multiple aeration tanks cannot be used efficiently to treat the wastewater. Summary of the Invention

[0003] In order to solve the deficiencies of the above-mentioned prior art, the purpose of the utility model is to provide a treatment device for wastewater from organic solvent recovery to overcome the defects in the prior art.

[0004] To achieve the above purpose, the utility model provides a treatment device for wastewater from organic solvent recovery, which includes a plurality of aeration tanks and a control terminal; wherein, a water inlet pipe is connected to the lower side of each aeration tank, and the water inlet pipes of the plurality of aeration tanks are all connected to a total water inlet pipe through their respective water inlet valves. The water inlet valves are electrically connected and signal-connected to the control terminal so that the control terminal can control the opening or closing of the water inlet valve of each aeration tank; a drain pipe is connected to the lower side of the other side of each aeration tank, and the drain pipes of the plurality of aeration tanks are all connected to a total drain pipe through their respective drain pumps, and the drain pipe of the upper-level aeration tank is connected to the water inlet pipe of the lower-level aeration tank through a drain pump; the drain pumps are electrically connected and signal-connected to the control terminal so that the control terminal can control the drain pump of each aeration tank to open or close in the direction of the total drain pipe or the water inlet pipe of the lower-level aeration tank; an air inlet is connected to the middle side of each aeration tank, and an aeration pump is provided at the air inlet. The aeration pump is electrically connected and signal-connected to the control terminal so that the control terminal can control the opening or closing of the aeration pump of each aeration tank; an air outlet is connected to the top of each aeration tank, and the air outlet is connected to the inlet of an adsorber through an exhaust valve; the exhaust valve is electrically connected and signal-connected to the control terminal so that the control terminal can control the opening or closing of the exhaust valve of each aeration tank.

[0005] Through the above technical solution, by setting the water inlet pipelines and drainage pipelines of multiple aeration tanks, and controlling the water inlet valves, drainage pumps, aeration pumps and exhaust valves of each aeration tank by the control terminal, it is realized that wastewater can be introduced into one aeration tank or two or more aeration tanks simultaneously, and the wastewater can be discharged simultaneously after an aeration process ends, or when an aeration tank malfunctions, the next-level aeration tank can continue the aeration treatment for different scenarios; and through the automatic control of the control terminal, it has the characteristics of convenient operation and improves the efficiency of wastewater treatment.

[0006] As a further description of the treatment device for organic solvent recovery wastewater of the present utility model, preferably, the control terminal is provided with a controller module, a water inlet control module, a drainage control module, an air inlet control module, an exhaust control module and a timer module; the timer module is electrically connected and signal-connected to the controller module, so that the timer module outputs a start signal or an end signal to the controller module; the controller module is electrically connected and signal-connected to the water inlet control module, and the water inlet control module is electrically connected and signal-connected to the water inlet valve of each aeration tank, so that when the controller module receives the start signal, the controller module controls the water inlet control module to open the water inlet valve of at least one aeration tank; the controller module is electrically connected and signal-connected to the drainage control module, and the drainage control module is electrically connected and signal-connected to the drainage pump of each aeration tank, so that when the controller module receives the end signal, the controller module controls the drainage control module to open the drainage pump of at least one aeration tank; the controller module is electrically connected and signal-connected to the air inlet control module, and the air inlet control module is electrically connected and signal-connected to the aeration pump of each aeration tank, so that the controller module controls the air inlet control module to open the aeration pump of at least one aeration tank; the controller module is electrically connected and signal-connected to the exhaust control module, and the exhaust control module is electrically connected and signal-connected to the exhaust valve of each aeration tank, so that the controller module controls the exhaust control module to open the exhaust valve of at least one aeration tank.

[0007] Through the above technical solution, by setting the controller module, the water inlet control module, the drainage control module, the air inlet control module, the exhaust control module and the timer module to cooperate to realize the treatment of organic solvent recovery wastewater by multiple aeration tanks, the efficiency of wastewater treatment is improved, and different usage scenarios can be adapted.

[0008] As a further description of the treatment device for organic solvent recovery wastewater of the present utility model, preferably, the control terminal is provided with an abnormal interruption module, and the abnormal interruption module is electrically connected and signal-connected to the controller module, so that when the abnormal interruption module monitors that an aeration tank is operating abnormally, the abnormal interruption module sends an interruption signal to the controller module, and the controller module controls the water inlet control module, the drainage control module, the air inlet control module and the exhaust control module to close the water inlet valve, the drainage pump, the aeration pump and the exhaust valve of the corresponding aeration tank.

[0009] Through the above technical solution, by setting up the abnormal interruption module, it is possible to timely detect whether the operation of the aeration tank is abnormal, promptly handle it, and improve the safety of the device operation.

[0010] As a further description of the device for treating waste water for organic solvent recovery according to the present utility model, preferably, three layers of circularly arranged filter meshes for intercepting suspended substances in the waste water are provided at the inner bottom of the aeration tank, and the drain pipe is higher than the top surface of the filter mesh.

[0011] Through the above technical solution, by setting three layers of circularly arranged filter meshes, the suspended substances in the waste water can be intercepted, and the waste water can be preliminarily purified. The drain pipe is higher than the top surface of the filter mesh, so that the suspended substances on the filter mesh can be avoided from being carried away when discharging the waste water.

[0012] As a further description of the device for treating waste water for organic solvent recovery according to the present utility model, preferably, a stirring mechanism is provided in the aeration tank, and the stirring mechanism is connected to a motor at the outer top of the aeration tank; a motor control module is provided at the control end, the controller module is electrically connected and signal-connected to the motor control module, and the motor control module is electrically connected and signal-connected to the motor of each aeration tank, so that the controller module controls the motor control module to drive the motor of at least one aeration tank to start or stop.

[0013] Through the above technical solution, by setting up the stirring mechanism, the waste water can be fully contacted with the gas introduced from the air inlet, and the waste water treatment efficiency can be improved.

[0014] As a further description of the device for treating waste water for organic solvent recovery according to the present utility model, preferably, an air distribution pipe is fixed to the inner wall of the aeration tank in a spiral shape, and the air distribution pipe is connected to the air inlet through an air pump.

[0015] Through the above technical solution, the air distribution pipe is fixed to the inner wall of the aeration tank in a spiral shape, increasing the contact area with the waste water in the aeration tank and improving the waste water treatment efficiency.

[0016] As a further description of the device for treating waste water for organic solvent recovery according to the present utility model, preferably, the air distribution pipe includes a main pipe connected to the air inlet, the main pipe is looped around the inner wall of the aeration tank, a lower pipe spirally arranged on the inner wall of the aeration tank is connected downward on one side of the main pipe, the lower pipe is opposite to the filter mesh, an upper pipe spirally arranged on the inner wall of the aeration tank is connected upward on the other side of the main pipe, the upper pipe and the main pipe are opposite to the stirring mechanism, and an air distribution valve is provided at the connection between the main pipe and the inlet of the lower pipe, and the air distribution valve is electrically connected and signal-connected to the air inlet control module, so that the air inlet control module controls the air distribution valve to open or close.

[0017] Through the above technical solution, the aeration pipe is divided into upper and lower parts and fixed on the inner wall of the aeration tank in a spiral shape to increase the contact area with the wastewater in the aeration tank. The lower half of the aeration pipe faces the filter screen. At the initial stage of wastewater inflow, the aeration is in full contact with the wastewater. As the suspended solids in the wastewater accumulate at the filter screen, in order to prevent the aeration from making the wastewater turbid, the aeration valve is closed so that the introduced gas only enters the upper section pipe and the main pipe, and the wastewater at the position of the stirring mechanism continues to be aerated to improve the wastewater treatment efficiency.

[0018] The beneficial effects of the present utility model are as follows: The treatment device for organic solvent recovery wastewater of the present utility model sets the water inlet pipelines and drainage pipelines of multiple aeration tanks, and the control terminal controls the water inlet valve, drainage pump, aeration pump, and exhaust valve of each aeration tank, realizing the inflow of wastewater into one aeration tank or two or more aeration tanks simultaneously, discharging the wastewater simultaneously after the end of one aeration process, or in the case of an abnormality in one aeration tank, the next-level aeration tank can continue the aeration treatment for different scenarios; and through the automatic control of the control terminal, it has the characteristics of convenient operation and improves the efficiency of wastewater treatment. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the treatment device for organic solvent recovery wastewater of the present utility model;

[0020] Figure 2 is a structural block diagram of the treatment device for organic solvent recovery wastewater of the present utility model;

[0021] Figure 3 is a structural block diagram of the abnormal interruption module of the present utility model;

[0022] Figure 4 is a schematic structural diagram of the aeration tank of the present utility model;

[0023] Figure 5 is a schematic layout diagram of the filter screen of the present utility model;

[0024] Figure 6 is a structural block diagram of the motor connected to the stirring mechanism of the present utility model;

[0025] Figure 7 is a schematic structural diagram of the aeration pipe of the present utility model.

[0026] In the figure: aeration tank 1, filter screen 11, stirring mechanism 12, motor 13, aeration pipe 14, main pipe 141, lower pipe 142, upper pipe 143, water inlet pipe 2, water inlet valve 21, drain pipe 3, drainage pump 31, air inlet 4, aeration pump 41, aeration valve 42, air outlet 5, exhaust valve 51, adsorber 6, total water inlet pipe 7, total drain pipe 8, control end 9, controller module 91, water inlet control module 92, drainage control module 93, air inlet control module 94, exhaust control module 95, timer module 96, abnormal interruption module 97 and motor control module 98. Detailed implementation manner

[0027] In order to further understand the structure, features and other purposes of the present invention, the following is a detailed description with reference to the attached preferred embodiments and accompanying drawings. The embodiments described by these drawings are only used to illustrate the technical solutions of the present invention and do not limit the present invention.

[0028] In the first embodiment of the present invention, as Figure 1 and Figure 2 shown, the present invention provides a treatment device for recovering waste water from organic solvents, including a plurality of aeration tanks 1 and a control end 9.

[0029] As Figure 1 shown, a water inlet pipe 2 is connected to the lower side of each aeration tank 1, and the water inlet pipes 2 of the plurality of aeration tanks 1 are all connected to the total water inlet pipe 7 through their respective water inlet valves 21. The water inlet valve 21 is electrically connected and signal-connected to the control end 9, so that the control end 9 controls the opening or closing of the water inlet valve 21 of each aeration tank 1. Taking the treatment device composed of three aeration tanks 1 shown in Figure 1 as an example, the water inlet valve 21 is preferably a three-way valve. If it is selected that the three aeration tanks 1 work simultaneously, the control end 9 controls all three water inlet valves 21 to be opened to introduce waste water. When the waste water introduction amount reaches the set value, the corresponding outlets of the corresponding water inlet valves 21 are closed until all three water inlet valves 21 are closed. If it is selected that one aeration tank 1 works, the control end 9 controls its corresponding water inlet valve 21 to be opened, and the other two water inlet valves 21 open the corresponding valve ports on the total water inlet pipe 7. When the waste water introduction amount reaches the set value, the three water inlet valves 21 are closed.

[0030] On the other side of the lower part of each aeration tank 1, a drain pipe 3 is connected. The drain pipes 3 of several aeration tanks 1 are all connected to the main drain pipe 8 through their respective drain pumps 31, and the drain pipe 3 of the upper-level aeration tank 1 is connected to the water inlet pipe 2 of the lower-level aeration tank 1 through the drain pump 31. The drain pump 31 is electrically connected and signal-connected to the control end 9, so that the control end 9 controls the drain pump 31 of each aeration tank 1 to open or close in the direction of the main drain pipe 8 or the water inlet pipe 2 of the lower-level aeration tank 1. Under normal circumstances, after aeration is completed in each aeration tank 1, the valve port in the direction of the main drain pipe 8 in the corresponding drain pump 31 is opened, and the treated wastewater is discharged through the main drain pipe 8. In case of an abnormal situation where the upper-level aeration tank 1 cannot continue to complete aeration, or when the set aeration time is short and the lower-level aeration tank 1 needs to continue treating the wastewater in the upper-level aeration tank 1, the valve port in the direction of the water inlet pipe 2 of the lower-level aeration tank 1 in the corresponding drain pump 31 is opened, and the wastewater is transported to the lower-level aeration tank 1. After the wastewater in the upper-level aeration tank 1 is emptied, the drain pump 31 is closed. The control end 9 can judge the corresponding drain pump 31 according to the opened water inlet valve 21 and open the drain pump 31 after a set time interval.

[0031] On one side of the middle part of each aeration tank 1, an air inlet 4 is connected, and an aeration pump 41 is provided at the air inlet 4. The aeration pump 41 is electrically connected and signal-connected to the control end 9, so that the control end 9 controls the aeration pump 41 of each aeration tank 1 to open or close. When the aeration pump 41 is opened, the wastewater in the aeration tank 1 is aerated and purged, and the aeration pump 41 is closed after the set time ends. The control end 9 can judge the corresponding aeration pump 41 according to the opened water inlet valve 21 and open the aeration pump 41 after the water inlet valve 21 is closed and after a set time interval after closing.

[0032] An air outlet 5 is connected to the top of each aeration tank 1, and the air outlet 5 is connected to the inlet of the adsorber 6 through an exhaust valve 51. The exhaust valve 51 is electrically connected and signal-connected to the control end 9, so that the control end 9 controls the exhaust valve 51 of each aeration tank 1 to open or close. When the exhaust valve 51 is opened, the waste gas generated by aeration is discharged from the air outlet 5 to the adsorber 6, and the exhaust valve 51 is closed after the set exhaust time. A blower can be arranged at the air outlet 5 to send the waste gas generated by aeration into the adsorber 6.

[0033] In this embodiment, by setting the water inlet pipeline and the drain pipeline of multiple aeration tanks 1, the control end 9 controls the water inlet valve 21, the drain pump 31, the aeration pump 41 and the exhaust valve 51 of each aeration tank 1, realizing the treatment of organic solvent recovery wastewater by multiple aerations, improving the efficiency of wastewater treatment, and being able to adapt to different usage scenarios.

[0034] In the second embodiment of the present utility model, as Figure 2As shown in the figure, the control terminal 9 is provided with a controller module 91, a water inlet control module 92, a drainage control module 93, an air inlet control module 94, an exhaust control module 95 and a timer module 96.

[0035] The timer module 96 is electrically connected and signal-connected to the controller module 91. The timer module 96 outputs a start signal or an end signal to the controller module 91. The timer module 96 is used to set the time and the number of cycles of an aeration process. After an aeration process ends, the controller module 91 controls the timer module 96 to time the next aeration process.

[0036] The controller module 91 is electrically connected and signal-connected to the water inlet control module 92, and the water inlet control module 92 is electrically connected and signal-connected to the water inlet valve 21 of each aeration tank 1. When the controller module 91 receives the start signal, the controller module 91 controls the water inlet control module 92 to open the water inlet valve 21 of at least one aeration tank 1. The water inlet control module 92 is used to control the opening or closing of multiple water inlet valves 21. The water inlet control module 92 receives the control signal of the controller module 91 and controls the corresponding water inlet valve 21 to open. When the controller module 91 sends a control signal for starting an aeration tank 1, the water inlet control module 92 selects the water inlet valve 21 corresponding to one aeration tank 1 to open according to the states of all aeration tanks 1, and the corresponding valve ports of the remaining water inlet valves 21 are opened on the main water inlet pipe 7, and when the wastewater inflow reaches the set value, the water inlet valve 21 is closed. The monitoring of the wastewater inflow can be achieved by setting a flow meter on the water inlet pipe 2. The flow meter is electrically connected and signal-connected to the water inlet control module 92. When the water inlet control module 92 opens the water inlet valve 21, it also opens the flow meter, and controls the closing of the water inlet valve 21 according to the flow signal fed back by the flow meter.

[0037] The controller module 91 is electrically connected and signal - connected to the drainage control module 93, and the drainage control module 93 is electrically connected and signal - connected to the drainage pump 31 of each aeration tank 1. When the controller module 91 receives the end signal, the controller module 91 controls the drainage control module 93 to turn on the drainage pump 31 of at least one aeration tank 1. The drainage control module 93 is used to control the opening or closing of multiple drainage pumps 31. The drainage control module 93 receives the control signal of the controller module 91 and controls the corresponding drainage pump 31 to open. The controller module 91 sends a control signal for draining water to the main drainage pipe 8 according to the opened water inlet valve 21 and the signal indicating the end of an aeration process, then the drainage control module 93 opens the valve port of the corresponding drainage pump 31 in the direction of the main drainage pipe 8. If the controller module 91 sends a control signal for draining water to the next - level aeration tank 1, then the drainage control module 93 opens the valve port of the corresponding drainage pump 31 in the direction of the water inlet pipe 2 of the next - level aeration tank 1. However, before that, the controller module 91 will obtain the state of the next - level aeration tank 1 and judge whether it can be used. If the next - level aeration tank 1 cannot be used, the controller module 91 issues an abnormal interruption signal. After the drainage pump 31 is turned on and the wastewater is basically emptied, the drainage control module 93 controls the drainage pump 31 to close. The monitoring of the basic emptying of the wastewater can be achieved by setting a water level gauge in the aeration tank 1. The water level gauge is electrically connected and signal - connected to the drainage control module 93. When the drainage control module 93 turns on the drainage pump 31, it also turns on the water level gauge and controls the drainage pump 31 to close according to the water level signal fed back by the water level gauge. Since there will be sediment generated after the wastewater in the aeration tank 1 is aerated, an ultrasonic water level gauge is used.

[0038] The controller module 91 is electrically connected and signal - connected to the air intake control module 94, and the air intake control module 94 is electrically connected and signal - connected to the aeration pump 41 of each aeration tank 1. The controller module 91 controls the air intake control module 94 to turn on the aeration pump 41 of at least one aeration tank 1. The air intake control module 94 is used to control the opening or closing of multiple aeration pumps 41. The air intake control module 94 receives the control signal of the controller module 91 and controls the corresponding aeration pump 41 to open. The controller module 91 sends a control signal according to the opened water inlet valve 21 and the aeration time. The air intake control module 94 controls the corresponding aeration pump 41 to open according to the aeration time and controls the aeration pump 41 to close after the aeration time ends.

[0039] The controller module 91 is electrically connected and signal - connected to the exhaust control module 95, and the exhaust control module 95 is electrically connected and signal - connected to the exhaust valve 51 of each aeration tank 1. The controller module 91 controls the exhaust control module 95 to open the exhaust valve 51 of at least one aeration tank 1. The exhaust control module 95 is used to control the opening or closing of multiple exhaust valves 51.

[0040] The exhaust control module 95 receives the control signal from the controller module 91 to control the corresponding exhaust valve 51 to open. The controller module 91 sends a control signal to open the exhaust valve 51 according to the opened water inlet valve 21 and the state inside the aeration tank 1. The state monitoring inside the aeration tank 1 can be set with a barometer and a gas alarm inside the aeration tank 1. The barometer and the gas alarm are electrically connected and signal-connected to the exhaust control module 95 respectively. The exhaust control module 95 controls the opening of the exhaust valve 51 according to the air pressure signal fed back by the barometer, and controls the closing of the exhaust valve 51 according to the waste gas concentration signal fed back by the gas alarm.

[0041] In this embodiment, by setting up the controller module 91, the water inlet control module 92, the drainage control module 93, the air inlet control module 94, the exhaust control module 95 and the timer module 96 to cooperate, the treatment of organic solvent recovery wastewater by multiple aeration tanks 1 is realized, the efficiency of wastewater treatment is improved, and different usage scenarios can be adapted.

[0042] In the third embodiment of the present utility model, as Figure 3 shown, the control end 9 is provided with an abnormal interruption module 97, and the abnormal interruption module 97 is electrically connected and signal-connected to the controller module 91. When the abnormal interruption module 97 detects that the aeration tank 1 is operating abnormally, the abnormal interruption module 97 sends an interruption signal to the controller module 91. The controller module 91 controls the water inlet control module 92, the drainage control module 93, the air inlet control module 94, and the exhaust control module 95 to close the water inlet valve 21, the drainage pump 31, the aeration pump 41, and the exhaust valve 51 of the corresponding aeration tank 1. The abnormal interruption module 97 is used to monitor the operating states of the water inlet valve 21, the drainage pump 31, the aeration pump 41, and the exhaust valve 51, as well as the feedback signals of the flow meter, the water level meter, the barometer, and the gas alarm set inside the aeration tank 1. The controller module 91 sends the historical data statistics of the normal operation of the aeration tank 1 to the abnormal interruption module 97, and the abnormal interruption module 97 judges whether the aeration tank 1 is operating normally according to the historical data statistics and the real-time data signals.

[0043] In this embodiment, by setting up the abnormal interruption module 97, it is possible to timely detect whether the aeration tank 1 is operating abnormally and perform timely processing, improving the safety of the device operation.

[0044] In the fourth embodiment of the present utility model, as Figure 4 and Figure 5 shown, at the bottom inside the aeration tank 1, there are three layers of circularly arranged filter meshes 11 for intercepting suspended solids in the wastewater, and the drain pipe 3 is higher than the top surface of the filter meshes 11. In this embodiment, by setting three layers of circularly arranged filter meshes 11, the suspended solids in the wastewater can be intercepted to preliminarily purify the wastewater.

[0045] In the fifth embodiment of the present utility model, as Figure 4 andFigure 6 As shown in the figure, a stirring mechanism 12 is provided inside the aeration tank 1, and the stirring mechanism 12 is connected to the motor 13 at the outer top of the aeration tank 1. The control end 9 is provided with a motor control module 98. The controller module 91 is electrically connected and signal-connected to the motor control module 98, and the motor control module 98 is electrically connected and signal-connected to the motor 13 of each aeration tank 1. The controller module 91 controls the motor control module 98 to drive the motor 13 of at least one aeration tank 1 to start or stop.

[0046] In this embodiment, the stirring mechanism 12 is a conventional structure in the prior art. The stirring mechanism 12 enables the wastewater to fully contact the gas introduced through the air inlet 4, improving the wastewater treatment efficiency.

[0047] In the sixth embodiment of the present utility model, as Figure 7 shown in the figure, an aeration pipe 14 is fixed to the inner wall of the aeration tank 1 in a spiral shape, and the aeration pipe 14 is connected to the air inlet 4 through an aeration pump 41.

[0048] The aeration pipe 14 includes a main pipe 141 connected to the air inlet 4. The main pipe 141 is arranged in a ring shape on the inner wall of the aeration tank 1. One side of the main pipe 141 is connected downward to a lower pipe 142 arranged in a spiral shape on the inner wall of the aeration tank 1. The lower pipe 142 faces the filter screen 11. The other side of the main pipe 141 is connected upward to an upper pipe 143 arranged in a spiral shape on the inner wall of the aeration tank 1. The upper pipe 143 and the main pipe 141 face the stirring mechanism 12. An aeration valve 42 is provided at the connection between the main pipe 141 and the inlet of the lower pipe 142. The aeration valve 42 is electrically connected and signal-connected to the air intake control module 94, so that the air intake control module 94 controls the opening or closing of the aeration valve 42.

[0049] In this embodiment, the aeration pipe 14 is divided into upper and lower parts and is fixed to the inner wall of the aeration tank 1 in a spiral shape, increasing the contact area with the wastewater in the aeration tank 1. The lower half of the aeration pipe 14 faces the filter screen 11. At the initial stage of introducing wastewater, the air is in full contact with the wastewater. As the suspended matter in the wastewater accumulates at the filter screen 11, in order to avoid making the wastewater turbid by aeration, the aeration valve 42 is closed so that the introduced gas only enters the upper pipe 143 and the main pipe 141, and continues to aerate the wastewater at the position of the stirring mechanism 12, improving the wastewater treatment efficiency.

[0050] It should be noted that the above-mentioned invention content and specific implementation manners are intended to prove the practical application of the technical solutions provided by the present utility model, and should not be construed as a limitation on the protection scope of the present utility model. Those skilled in the art can make various modifications, equivalent replacements or improvements within the spirit and principle of the present utility model. The protection scope of the present utility model shall be subject to the appended claims.

Claims

1. A treatment device for organic solvent recovery wastewater, characterized in that: It comprises a plurality of aeration tanks (1) and a control end (9); wherein, A water inlet pipe (2) is connected to one side of the lower part of each aeration tank (1), and the water inlet pipes (2) of the plurality of aeration tanks (1) are connected to the main water inlet pipe (7) through respective water inlet valves (21), and the water inlet valves (21) are electrically and signal-connected to the control end (9), so that the control end (9) controls the water inlet valve (21) of each aeration tank (1) to be opened or closed; A drainage pipe (3) is connected to the other side of the lower part of each aeration tank (1); the drainage pipes (3) of the plurality of aeration tanks (1) are connected to the main drainage pipe (8) through their respective drainage pumps (31), and the drainage pipe (3) of the upper-stage aeration tank (1) is connected to the water inlet pipe (2) of the lower-stage aeration tank (1) through the drainage pump (31); the drainage pump (31) is electrically and signal-connected to the control end (9), so that the control end (9) controls the drainage pump (31) of each aeration tank (1) to select the direction of the main drainage pipe (8) or the direction of the water inlet pipe (2) of the lower-stage aeration tank (1) to open or close; An air inlet (4) is connected to one side of the middle of each aeration tank (1), and an aeration pump (41) is provided at the air inlet (4). The aeration pump (41) is electrically and signal-connected to a control end (9), so that the control end (9) controls the aeration pump (41) of each aeration tank (1) to be turned on or off; An air outlet (5) is connected to the top of each aeration tank (1), and the air outlet (5) is connected to the inlet of the adsorber (6) through an exhaust valve (51); the exhaust valve (51) is electrically and signal-connected to a control terminal (9), so that the control terminal (9) controls the exhaust valve (51) of each aeration tank (1) to be opened or closed.

2. The device for treating wastewater from organic solvent recovery according to claim 1, characterized in that: The control end (9) is provided with a controller module (91), a water inlet control module (92), a drainage control module (93), an air intake control module (94), an exhaust control module (95) and a timer module (96); The timer module (96) is electrically connected to the controller module (91) and is signal-connected so that the timer module (96) outputs a start signal or an end signal to the controller module (91); The controller module (91) is electrically connected and signal-connected to the water inlet control module (92), and the water inlet control module (92) is electrically connected and signal-connected to the water inlet valve (21) of each aeration tank (1), so that when the controller module (91) receives the start signal, the controller module (91) controls the water inlet control module (92) to open the water inlet valve (21) of at least one aeration tank (1); The controller module (91) is electrically connected and signal-connected to the drainage control module (93), and the drainage control module (93) is electrically connected and signal-connected to the drainage pump (31) of each aeration tank (1), so that when the controller module (91) receives the end signal, the controller module (91) controls the drainage control module (93) to turn on the drainage pump (31) of at least one aeration tank (1); The controller module (91) is electrically and signal-connected to the air intake control module (94), and the air intake control module (94) is electrically and signal-connected to the aeration pump (41) of each aeration tank (1), so that the controller module (91) controls the air intake control module (94) to turn on the aeration pump (41) of at least one aeration tank (1); The controller module (91) is electrically and signal-connected to the exhaust control module (95), and the exhaust control module (95) is electrically and signal-connected to the exhaust valve (51) of each aeration tank (1), so that the controller module (91) controls the exhaust control module (95) to open the exhaust valve (51) of at least one aeration tank (1).

3. The device for treating wastewater from organic solvent recovery according to claim 2, characterized in that: The control end (9) is provided with an abnormal interruption module (97), which is electrically connected to the controller module (91) and connected to the controller module (91) by signals, so that when the abnormal interruption module (97) detects that the aeration tank (1) is operating abnormally, the abnormal interruption module (97) sends an interruption signal to the controller module (91), and the controller module (91) controls the water inlet control module (92), the drainage control module (93), the air intake control module (94), and the exhaust control module (95) to close the water inlet valve (21), the drainage pump (31), the aeration pump (41), and the exhaust valve (51) of the corresponding aeration tank (1).

4. The treatment device for organic solvent recovery wastewater according to claim 2, characterized in that: A three-layer circular filter screen (11) is provided at the bottom of the aeration tank (1) for intercepting suspended matter in the wastewater, and the drainage pipe (3) is higher than the top surface of the filter screen (11).

5. The device for treating organic solvent recovery wastewater according to claim 2, characterized in that: A stirring mechanism (12) is provided in the aeration tank (1), and the stirring mechanism (12) is connected to a motor (13) on the top of the aeration tank (1); a motor control module (98) is provided at the control end (9), a controller module (91) is electrically and signal-connected to the motor control module (98), and the motor control module (98) is electrically and signal-connected to the motor (13) of each aeration tank (1), so that the controller module (91) controls the motor control module (98) to drive the motor (13) of at least one aeration tank (1) to start or stop.

6. The device for treating organic solvent recovery wastewater according to claim 2, characterized in that: An aeration pipe (14) is fixed in a spiral shape on the inner wall of the aeration tank (1), and the aeration pipe (14) is connected to the air inlet (4) via an aeration pump (41).

7. The device for treating organic solvent recovery wastewater according to claim 6, characterized in that: The aeration pipe (14) comprises a main pipe (141) connected to the air inlet (4). The main pipe (141) is arranged in a ring on the inner wall of the aeration tank (1). One side of the main pipe (141) is connected downwardly to a lower pipe (142) arranged in a spiral shape on the inner wall of the aeration tank (1). The lower pipe (142) is opposite to the filter screen (11). The other side of the main pipe (141) is connected upwardly to an upper pipe (143) arranged in a spiral shape on the inner wall of the aeration tank (1). The upper pipe (143) and the main pipe (141) are opposite to the stirring mechanism (12). An aeration valve (42) is arranged at the connection between the main pipe (141) and the inlet of the lower pipe (142). The aeration valve (42) is electrically connected and signal-connected to an air intake control module (94) so ​​that the air intake control module (94) controls the aeration valve (42) to be opened or closed.

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