CN115636535A - Industrial Wastewater Comprehensive Treatment System and Process - Google Patents

Abstract

The application discloses a comprehensive industrial wastewater treatment system and process, including a physical stirring device and a chemical flocculation device connected to each other. The physical stirring device includes a tank for containing sewage, a driving mechanism, and a A filling mechanism for injecting flocculation agents; the chemical flocculation device includes interconnected pH adjustment tanks, flocculation tanks, sedimentation tanks, and aeration tanks; the heavy metal ions in industrial wastewater can be effectively removed through the above-mentioned system and process. The present invention can combine the process of solid-liquid separation and the process of adding flocculant through the physical stirring device, and under the stirring action of the physical stirring device, the flocculant and sewage can be mixed more uniformly, so that the electrocatalytic flocculation tank can be A large number of flocs are formed in a short time, which greatly shortens the time compared with the existing natural flocculation sedimentation.

Description

Industrial Wastewater Comprehensive Treatment System and Process

technical field

The invention relates to the technical field of environmental protection, in particular to the technical field of environmental protection devices and processes for industrial wastewater treatment, and in particular to a comprehensive industrial wastewater treatment system and process.

Background technique

Industrial wastewater treatment refers to the water used in the industrial production process is properly treated and reused for production or properly discharged to the factory, including the management of production water and the measures taken to facilitate the treatment of wastewater. The waste that needs to be treated in the existing industrial wastewater is mainly heavy metal ions. With the current revolution in the automotive field, major car manufacturers are gradually transforming from traditional fuel vehicles to new energy electric vehicles, which makes the power of pure electric new energy vehicles The demand for power lithium batteries, one of the core components of energy sources, has increased sharply, resulting in unprecedented pressure on the discharge of industrial wastewater generated by the production of lithium batteries.

As one of the most important industrial wastewater at present, the industrial wastewater produced by lithium battery manufacturing mainly includes ternary materials, lithium cobaltate, lithium iron phosphate, carbon powder, NMP solvent, deionized water solvent, etc. The existing treatment methods mostly use physical filtration, flocculation and sedimentation, anaerobic, and itchy treatment, which require multiple ponds that occupy a very large area, and the natural sedimentation time is long, and the treatment efficiency is relatively low.

Contents of the invention

In order to solve the problem that the existing industrial wastewater adopts natural flocculation sedimentation, which cannot be treated in a continuous flow, the treatment time is longer. The industrial wastewater can achieve continuous multi-stage treatment without long waiting for static sedimentation, shorten the industrial wastewater treatment cycle per unit volume, and improve treatment efficiency.

In order to achieve the above object, the technical scheme adopted in this application is:

The comprehensive industrial wastewater treatment system includes interconnected physical stirring devices and chemical flocculation devices. The filling mechanism for filling the flocculation agent in the tank is described. The tank body is provided with a water inlet. There is a filter screen, and a slag discharge port for collecting and removing precipitated impurities is provided near the filter screen at the bottom of the tank; the chemical flocculation device includes interconnected pH adjustment tanks, flocculation tanks, sedimentation tanks, and aeration tanks. The PH adjustment tank communicates with the drain port through the first sewage pipe, the bottom of the aeration tank is provided with an air inlet pipe, and the position near the top of the aeration tank is provided with a fifth sewage pipe for discharging sewage.

Preferably, the drive mechanism includes a variable speed transmission mechanism installed on a frame for supporting the tank body, and respectively drives a motor and a stirring unit connected to both ends of the variable speed transmission mechanism, and the stirring unit includes a sealed connection with the The shaft sleeve mechanism of the bottom of the tank body and the speed change transmission mechanism. A hollow rotating shaft passing through the bottom of the tank body is installed in the shaft sleeve mechanism. A plurality of paddles for stirring sewage are installed on the free end of the hollow rotating shaft.

Further preferably, the filling mechanism includes a medicine hose installed on the frame for filling the flocculation medicine, one end of the medicine hose is connected with a hard pipeline through an electromagnetic control valve, and the hard pipe The pipeline has a medicine feeding port, and the other end of the medicine hose communicates with the tank body.

Still further preferably, one end of the medicine hose communicating with the tank body is in airtight communication with the bottom of the hollow shaft through a joint, and a medicine flow channel for the circulation of medicine is arranged in the hollow shaft, and the hollow shaft is located in the tank body. The inner side wall is provided with a drug discharge port for the drug to flow out.

In order to facilitate structural maintenance and improve the convenience of subsequent equipment maintenance, preferably, the tank is provided with a cover, and the cover is provided with a water inlet for sewage to enter the tank.

Still further preferably, the cover is provided with an overflow pipe for balancing the internal pressure of the tank.

In order to reduce the floor area of the flocculation equipment and improve the efficiency through continuous flocculation, preferably, the chemical flocculation device adopts the following structural settings, specifically, the pH adjustment tank and the flocculation tank are connected through a second sewage pipe, and the second One end of the sewage pipe communicates with the top of the pH adjustment tank, the other end of the second sewage pipe extends to the position near the bottom of the flocculation tank, and the end of the flocculation tank away from the pH adjustment tank is connected to the exposure tank through the fourth sewage pipe. The fourth sewage pipe communicates with the top of the flocculation tank, and the other end extends to the position near the bottom of the aeration tank, and the position near the top of the aeration tank is also provided with a fifth sewage pipe for discharging sewage. The sewage pipe, and the air inlet pipe arranged at the bottom of the aeration tank for injecting air.

In order to further optimize the structure so that the structural design is further optimized without affecting the treatment effect, preferably, the flocculation tank is directly connected to the sedimentation tank, the sedimentation tank is located below the flocculation tank, and the bottom of the sedimentation tank is provided with a The third sewage pipe for sedimentation slag.

In order to deal with floating matter and realize centralized collection of floating matter, preferably, a mesh electrode for electrocatalytic flocculation is provided in the flocculation tank, an overflow port is provided on one side of the top of the aeration tank, and the other side of the overflow port is A foam tank for collecting flocculation foam is arranged on the same wall as the aeration tank.

The application also provides a comprehensive industrial wastewater treatment process, which is realized by the above-mentioned comprehensive treatment system, and specifically includes the following process flow: connect the industrial sewage pipe to be treated with the water inlet, and check the air tightness and the circulation of the pipeline; According to the flow rate of the industrial sewage pipe, the flocculant input flow is determined according to the preset ratio, stirred in the tank and synchronously input to the pH adjustment tank, and OH ^- regulator is added in the pH adjustment tank, so that the adjusted final pH value is pH9. 5-PH10; energize the mesh electrode for electrocatalytic flocculation, and at the same time inject compressed air into the intake pipe through the air compressor to increase the oxygen content in the aeration tank.

Beneficial effect:

The present invention can combine the process of solid-liquid separation and the process of adding flocculant into one through the physical stirring device. Under the stirring action of the physical stirring device, the flocculant and sewage can be mixed more uniformly, so that the electrocatalytic flocculation tank can be A large number of flocs are formed in a short time, which greatly shortens the time compared with the existing natural flocculation sedimentation.

In the present invention, multiple sets of treatment systems can be arranged in parallel and/or connected, and the content of pollutants such as heavy metals in the treated sewage can be gradually reduced through continuous treatment step by step. There is no need to stand still for a long time during the treatment process, and the treatment efficiency is improved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

Figure 1 is a structural axonometric view of a physical stirring device.

Fig. 2 is another visual structural axonometric view of Fig. 1 .

Fig. 3 is another visual structural axonometric view of Fig. 2 .

FIG. 4 is a top view of FIG. 1 .

Fig. 5 is a full sectional view of Fig. 4 along section A-A.

Fig. 6 is a top view of the chemical flocculation device.

Fig. 7 is a full sectional view of Fig. 6 along the line B-B.

In the figure: 1-cover body; 2-tank body; 3-drainage port; 4-slag discharge port; 5-frame; 6-dosing port; 7-medicine hose; 8-speed transmission mechanism; ;10-overflow pipe; 11-electromagnetic control valve; 12-water inlet; 13-shaft sleeve mechanism; 14-filter; ; 19-the first sewage pipe; 20-PH adjustment tank; 21-the second sewage pipe; 22-flocculation tank; 23-sedimentation tank; 24-the third sewage pipe; 25-mesh electrode; ; 27-aeration tank; 28-intake pipe; 29-fifth sewage pipe; 30-overflow port; 31-foam pool.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of this application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" " and other indications are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the application product is used, and are only for the convenience of describing the application and simplifying the description, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the application. In addition, if the terms "first", "second" and the like appear in the description of the present application, they are only used to distinguish the description, and should not be understood as indicating or implying relative importance.

In addition, terms such as "horizontal" and "vertical" in the description of the present application do not mean that the components are required to be absolutely horizontal or hang, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of this application, it should also be explained that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed The connection can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

Example 1:

This embodiment provides a comprehensive industrial wastewater treatment system, including interconnected physical stirring devices and chemical flocculation devices, as shown in Figures 1 to 7 of the description, the physical stirring device includes a tank 2 for holding sewage. The driving mechanism for providing stirring driving force and stirring the sewage, and the filling mechanism for filling the flocculation agent into the tank body 2, the tank body 2 is provided with a water inlet 12, and the bottom of the tank body 2 adopts an inclined setting And near the lower end of the bottom, a drain port 3 is provided, a filter screen 14 is provided between the drain port 3 and the inside of the tank body 2, and a filter screen 14 is arranged at the bottom of the tank body 2 near the filter screen 14 to collect and remove precipitated impurities. Slag outlet 4; the chemical flocculation device includes a pH adjustment tank 20 connected to each other, a flocculation tank 22, a sedimentation tank 23, and an aeration tank 27, and the pH adjustment tank 20 is connected to the water outlet 3 through the first sewage pipe 19 Connected, the bottom of the aeration tank 27 is provided with an air inlet pipe 28, and the position near the top of the aeration tank 27 is provided with a fifth sewage pipe 29 for discharging sewage.

Working principle: The function of the physical stirring device is to rotate and stir the sewage. The vortex generated by the stirring is used to concentrate and condense the solid matter contained in the sewage which is denser than the sewage, and the settlement of the solid matter is controlled by adjusting the stirring speed. When the speed is high, the solid matter is more affected by the sewage, the mass is greater, and the speed at which it is gathered in the sewage swirl is faster, and it can be settled more quickly; when the speed is small, the speed at which the solid matter is gathered will decrease. Slower; when the rotating speed decreases or even stops, the solid matter will naturally settle to the bottom of the tank body 2 and fall into the slagging outlet 4 along with the bottom of the inclined tank body 2, so as to achieve the effect of collecting solid matter and achieve The effect of solid-liquid separation; since the drain port 3 will pass through the filter screen 14 when entering the next process for processing, the impurities that have not been completely settled and entered the slag discharge port 4 will be blocked by the filter screen 14. When the water flow It will also fall to the slag outlet 4 when it stops, and will not enter the next treatment process with the sewage, such as in the chemical flocculation device. The inclined setting at the bottom of the tank body 2 is one of the structural improvement points in this embodiment. The technical effect of the structural improvement setting is that when the sewage is stirred, the sewage forms a regular revolving body in the tank body 2. For the inclined setting At the bottom of the tank body 2, the sewage on the lower side will not be significantly stirred, and is static, which is beneficial to the settlement of solid impurities. Based on this setting, the continuous solid-liquid separation effect can be achieved without stopping the stirring; at the same time, the agent for flocculation is continuously added in equal proportions through the filling mechanism, so that the sewage can be fully mixed and stirred before the formal flocculation , to enhance the effect of flocculation. After solid-liquid separation and flocculant mixing, the filtered and flocculated pretreated sewage will be sent to the chemical flocculation device through the outlet 3, and the pH value will be adjusted so that the industrial sewage is under alkaline conditions, plus Electrocatalysis for efficient flocculation. In this embodiment, the principle of electrocatalytic flocculation is consistent with the prior art.

Example 2:

In this embodiment, on the basis of Embodiment 1, the structure of the driving mechanism is further optimized in combination with Figure 5 of the description. As shown in Figure 4 and Figure 5 of the description, the driving mechanism includes a tank for supporting the tank body 2 The variable speed transmission mechanism 8 on the frame 5, and the motor 9 and the stirring unit connected to the two ends of the variable speed transmission mechanism 8 are respectively driven, and the stirring unit includes a shaft sleeve mechanism 13 that seals the bottom of the tank body 2 and the variable speed transmission mechanism 8 A hollow rotating shaft 16 penetrating through the bottom of the tank body 2 is installed in the sleeve mechanism 13, and a plurality of paddles 18 for stirring sewage are installed on the free end of the hollow rotating shaft 16. The advantage of the above structure compared with directly adding the Xunyou agent to the sewage is that the agent is released from the bottom at the center, and can quickly spread around under the action of the rotating centrifugal force, from the inside to the outside, from the bottom to the top Fully diffuse into the sewage, avoiding the problem of blind area at the bottom and uneven mixing from the surface.

In this embodiment, the filling mechanism includes a medicine hose 7 installed on the frame 5 for filling the flocculation medicine, one end of the medicine hose 7 is connected with a hard pipeline through an electromagnetic control valve 11, The hard pipeline has a medicine filling port 6 , and the other end of the medicine hose 7 communicates with the tank body 2 .

Still further preferably, one end of the drug hose 7 communicating with the tank body 2 is in airtight communication with the bottom of the hollow rotating shaft 16 through a joint, and the hollow rotating shaft 16 is provided with a drug flow channel 15 for the drug to circulate. The side wall of the hollow rotating shaft 16 located inside the tank body 2 is provided with a drug discharge port 17 for the drug to flow out.

In order to facilitate structural maintenance and improve the convenience of subsequent equipment maintenance, in this embodiment, the tank body 2 is provided with a cover 1 , and the cover 1 is provided with a water inlet 12 for sewage to enter the tank body 2 . The cover body 1 is provided with an overflow pipe 10 for balancing the internal pressure of the tank body 2, which is used to avoid the problem that the pressure of the tank body 2 is over-pressurized due to excessive incoming water, so that the flocculation agent cannot be filled in sufficient quantities.

Example 3:

In order to reduce the floor area of the flocculation equipment and improve the efficiency through continuous flocculation, as shown in the accompanying drawings 6-7 of the specification, the chemical flocculation device adopts the following structure, specifically between the pH adjustment tank 20 and the flocculation tank 22 Communicate through the second sewage pipe 21, one end of the second sewage pipe 21 communicates with the top of the pH adjustment tank 20, and the other end of the second sewage pipe 21 extends to the position near the bottom of the flocculation tank 22, the flocculation tank 22 The end far away from the pH adjustment tank 20 is connected to the aeration tank 27 through the fourth sewage pipe 26, the fourth sewage pipe 26 communicates with the top of the flocculation tank 22, and the other end extends to the aeration tank 27 Near the bottom, the aeration tank 27 is also provided with a fifth sewage pipe 29 near the top for discharging sewage, and an air inlet pipe 28 arranged at the bottom of the aeration tank 27 for injecting air.

In order to further optimize the structure, so that the structural design is further optimized without affecting the treatment effect, preferably, the flocculation tank 22 is directly connected to the sedimentation tank 23, and the sedimentation tank 23 is located below the flocculation tank, and the bottom of the sedimentation tank 23 A third sewage pipe 24 for removing sediment residue is provided.

In order to deal with the floating matter and realize the centralized collection of the floating matter, a mesh electrode 25 for electrocatalytic flocculation is provided in the flocculation tank 22, and an overflow port 30 is provided on the top side of the aeration tank 27, and the overflow port The other side of 30 and the aeration tank 27 are provided with a foam tank 31 for collecting flocculation foam.

Example 4:

This application also provides a comprehensive industrial wastewater treatment process, which is realized by the above-mentioned comprehensive treatment system, specifically including the following process flow: connect the industrial sewage pipe to be treated with the water inlet 12, check the air tightness and the circulation of the pipeline ; According to the size of the flow rate of the industrial sewage pipe, the flocculant input flow is determined according to the preset ratio, stirred in the tank body 2 and synchronously input to the pH adjustment tank 20, and OH ^- regulator is added in the pH adjustment tank 20, so that the adjusted final The pH value is PH9.5-PH10; energize the mesh electrode 25 to carry out electrocatalytic flocculation, and at the same time inject compressed air into the intake pipe 28 through the air compressor to increase the oxygen content in the aeration tank 27.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. Industrial waste water integrated processing system, including physical agitating unit and chemical flocculation device that communicate each other, its characterized in that: the physical stirring device comprises a tank body (2) for containing sewage, a driving mechanism for providing stirring driving force and stirring the sewage, and a filling mechanism for filling flocculating agents into the tank body (2), wherein a water inlet (12) is formed in the tank body (2), the bottom of the tank body (2) is obliquely arranged, a water outlet (3) is formed in the position close to the lower end of the bottom, a filter screen (14) is arranged between the water outlet (3) and the inside of the tank body (2), and a slag discharge port (4) for collecting and discharging precipitated impurities is formed in the position close to the filter screen (14) and at the bottom of the tank body (2);

the chemical flocculation device comprises a PH adjusting tank (20), a flocculation tank (22), a sedimentation tank (23) and an aeration tank (27) which are communicated with each other, wherein the PH adjusting tank (20) is communicated with the water outlet (3) through a first sewage pipe (19), an air inlet pipe (28) is arranged at the bottom of the aeration tank (27), and a fifth sewage pipe (29) for discharging sewage is arranged at the position, close to the top, of the aeration tank (27).

2. The integrated industrial wastewater treatment system according to claim 1, wherein: actuating mechanism is including installing and being used for supporting variable speed drive mechanism (8) on frame (5) of the jar body (2) to and respectively the drive connection motor (9) and the stirring unit at variable speed drive mechanism (8) both ends, the stirring unit is including sealing connection axle sleeve mechanism (13) of jar body (2) bottom and variable speed drive mechanism (8), install in axle sleeve mechanism (13) and run through cavity pivot (16) of jar body (2) bottom, install blade (18) that the multi-disc is used for stirring sewage on the free end of cavity pivot (16).

3. The industrial wastewater integrated processing system according to claim 2, characterized in that: the filling mechanism comprises a medicament hose (7) which is installed on the rack (5) and used for filling the flocculating medicament, one end of the medicament hose (7) is connected with a hard pipeline through an electromagnetic control valve (11), the hard pipeline is provided with a medicament adding port (6), and the other end of the medicament hose (7) is communicated with the tank body (2).

4. The integrated industrial wastewater treatment system according to claim 3, wherein: the one end of the medicament hose (7) and the jar body (2) intercommunication pass through the joint with the airtight intercommunication in bottom of cavity pivot (16), be provided with in cavity pivot (16) and supply medicament circulation's medicament runner (15), cavity pivot (16) are located and are provided with row's medicine mouth (17) that supply the medicament to flow on the lateral wall of jar body (2) inside.

5. The integrated industrial wastewater treatment system according to any one of claims 1 to 4, wherein: the tank is characterized in that a cover body (1) is arranged on the tank body (2), and a water inlet (12) for sewage to enter the tank body (2) is formed in the cover body (1).

6. The integrated industrial wastewater treatment system according to claim 5, wherein: an overflow pipe (10) used for balancing the internal pressure of the tank body (2) is arranged on the cover body (1).

7. The integrated industrial wastewater treatment system according to claim 6, wherein: the PH adjusting tank (20) is communicated with the flocculation tank (22) through a second sewage pipe (21), one end of the second sewage pipe (21) is communicated with the top of the PH adjusting tank (20), the other end of the second sewage pipe (21) extends to the position, close to the bottom, of the flocculation tank (22), one end, far away from the PH adjusting tank (20), of the flocculation tank (22) is communicated with an aeration tank (27) through a fourth sewage pipe (26), the fourth sewage pipe (26) is communicated with the top of the flocculation tank (22), the other end of the flocculation tank extends to the position, close to the bottom, of the aeration tank (27), and the position, close to the top, of the aeration tank (27) is further provided with a fifth sewage pipe (29) for discharging sewage and an air inlet pipe (28) arranged at the bottom of the aeration tank (27) and used for injecting air.

8. The integrated industrial wastewater treatment system according to claim 7, wherein: the flocculation tank (22) is directly communicated with the sedimentation tank (23), the sedimentation tank (23) is positioned below the flocculation tank, and a third sewage pipe (24) for discharging sediment is arranged at the bottom of the sedimentation tank (23).

9. The integrated industrial wastewater treatment system according to claim 8, wherein: a mesh electrode (25) for electrocatalytic flocculation is arranged in the flocculation tank (22), an overflow opening (30) is arranged on one side of the top of the aeration tank (27), and a foam tank (31) for collecting flocculated foam is arranged on the other side of the overflow opening (30) and the aeration tank (27) on the same wall.

10. The comprehensive treatment process of industrial wastewater is characterized by comprising the following steps: the integrated processing system of claim 9, which comprises the following steps: communicating an industrial sewer pipe to be treated with the water inlet (12), checking the air tightness and the pipeline circulation; according to the flow of the industrial sewage pipe, the flocculant input flow is determined according to a preset proportion, stirred in the tank body (2) and synchronously input into the PH adjusting tank (20), and OH-containing water is added into the PH adjusting tank (20) ^- A regulator, so that the adjusted final pH value is 9.5-10; electrifying the mesh electrode (25) to carry out electrocatalytic flocculation, and simultaneously injecting compressed air into the air inlet pipe (28) through an air compression device to increase the oxygen content in the aeration tank (27).

Images