Mixing device for sewage treatment

Abstract

The utility model discloses a mixing device for sewage treatment, which comprises a box body, a stirring mechanism is arranged in the box body, the box body is sequentially provided with a stirring chamber and a filtering chamber from top to bottom, the stirring chamber and the filtering chamber are communicated, the stirring mechanism is arranged in the stirring chamber and is used for mixing medicaments, and a plurality of parallel precipitation plates are arranged in the filtering chamber at intervals along the horizontal direction. And the upper part of the precipitation plate is an inclined plate. According to the utility model, the plurality of precipitation plates are arranged in the filter chamber, so that the filter chamber can be divided into a plurality of narrow filter channels, the influence of water flow disturbance caused by stirring of the stirring mechanism is further reduced, precipitates can be stably settled, the precipitation time is shortened, and the precipitation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a mixing device for sewage treatment. Background Art

[0002] Wastewater is generated during the production of printed circuit boards (PCBs). Since wastewater contains various heavy metals, organic matter, acid-base substances, and chelating agents, chemical agents need to be added to treat it before it is discharged. Chemical agents can cause various heavy metals in wastewater to form precipitates or complexes, thereby separating the heavy metals. In order to promote the mixing of agents and wastewater, existing sewage treatment devices are equipped with a stirring mechanism. After the agents and sewage are fully mixed, the formed precipitate will naturally settle to the bottom, thereby achieving solid-liquid separation. However, due to excessive disturbance of the water flow during the stirring process of the stirring mechanism, the precipitate that sinks to the bottom is easily re-stirred, causing the precipitated substances to be re-suspended, thereby increasing the sedimentation time, resulting in low efficiency of sewage treatment. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a mixing device for sewage treatment to solve the problem of low sedimentation efficiency in the existing sewage treatment process.

[0004] The technical solution adopted by the utility model is as follows:

[0005] The mixing device for sewage treatment comprises a box body, a stirring mechanism is arranged in the box body, a stirring chamber and a filtering chamber are connected in sequence from top to bottom, the stirring mechanism is arranged in the stirring chamber for mixing reagents, a plurality of mutually parallel sedimentation plates are arranged at intervals in the horizontal direction in the filtering chamber, and the upper part of the sedimentation plate is an inclined plate.

[0006] Principle of the utility model:

[0007] In this solution, sewage and chemicals are stirred and mixed in the mixing chamber to form a precipitate, and the precipitate naturally settles to the filter chamber under the action of gravity. By installing a number of sedimentation plates in the filter chamber, the sedimentation plates can divide the entire filter chamber into a number of narrow filter channels. Since the narrow channels have a small cross-sectional area, the cross-sectional area through which the fluid passes is small. When the fluid is confined to a smaller space, the chance of lateral movement is reduced, thereby suppressing water flow disturbances, so that the precipitate in the filter channel can settle to the bottom more stably, which is conducive to the stable sedimentation of the precipitate. By setting the upper part of the sedimentation plate as an inclined plate, the angle of the inclined plate itself can block the direct impact of the water flow, which can further reduce the impact of water flow disturbances.

[0008] Compared with the prior art, the utility model has the following beneficial effects:

[0009] 1. This solution can divide the filter chamber into multiple narrow filter channels by setting up a number of sedimentation plates in the filter chamber, thereby reducing the impact of water flow disturbance caused by stirring of the stirring mechanism, allowing the sediment to settle stably, shortening the sedimentation time and improving the sedimentation efficiency.

[0010] 2. This solution sets the upper part of the sedimentation plate as an inclined plate. The angle of the inclined plate itself can block the direct impact of the water flow, which can further reduce the impact of water flow disturbance, facilitate the stable sedimentation of sediment, and thus improve the sedimentation efficiency.

[0011] As a preferred embodiment of the utility model, a filter screen is arranged below the sedimentation plate, and the filter screen is slidably connected to the box body. A sewage outlet is opened on one side of the lower part of the box body, and a sewage outlet is provided with a sewage outlet door. The filter screen can slide out from the sewage outlet to clean up the sediment. In the use state of this solution, the sewage outlet door is closed, and after the sediment enters the filter channel, the solid sediment is retained on the filter plate. After use, the sewage outlet door is opened, and then the filter screen is slid out from the sewage outlet to clean up the sediment on the filter plate. It is convenient to use.

[0012] As a preferred embodiment of the utility model, a sealing strip is provided between the sewage outlet and the sewage door. In this solution, by providing the sealing strip, it can be ensured that when the sewage door is closed, the box body can remain sealed to prevent liquid from flowing out.

[0013] As a preferred embodiment of the utility model, the lower part of the box is connected to a water outlet pipe, which is located below the filter screen. In this solution, after the sediment settles into the filter channel, the solid sediment is retained on the filter plate, and the filtrate flows to the bottom of the filter screen and flows out from the water outlet pipe.

[0014] As a preferred embodiment of the utility model, the stirring mechanism includes a rotating shaft rotatably connected to the box body, a plurality of stirring rods are arranged on the rotating shaft, a mounting shaft is fixed to the free end of the stirring rod, and a plurality of stirring blades are arranged around the mounting shaft. In this scheme, the stirring rod can stir the sewage and the medicine during the process of the stirring rod rotating with the rotating shaft, and the free end of the stirring rod is also provided with a stirring blade, which rotates synchronously with the stirring rod under the drive of the stirring rod, so the stirring blade can further stir the sewage and the medicine close to the box wall, thereby improving the mixing effect of the medicine.

[0015] As a preferred embodiment of the utility model, the stirring blade is provided with a through hole. In this scheme, by providing the through hole on the stirring blade, on the one hand, the contact area between the liquid and the stirring blade can be increased to make the mixing more uniform, and on the other hand, the fluid resistance on the stirring blade can be reduced to increase the service life of the stirring blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0017] Figure 2 It is a partial structural schematic diagram of an embodiment of the utility model;

[0018] Figure 3 It is a cross-sectional view of an embodiment of the utility model.

[0019] Reference numerals include:

[0020] Upper box body 1, water inlet pipe 11, dosing pipe 12, stirring chamber 13, lower box body 2, water outlet pipe 21, filter chamber 22, rotating shaft 3, stirring rod 31, mounting shaft 32, stirring blade 33, sedimentation plate 4, filter screen 5, sealing strip 6, sewage discharge door 7. DETAILED DESCRIPTION

[0021] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0022] In the description of the present application, the terms "top", "bottom", "one end", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0023] See also Figure 1-3 As shown, the present embodiment discloses a mixing device for sewage treatment, including a box body, the box body including a cylindrical upper box body 1 and a rectangular lower box body 2, the interior of the upper box body 1 is a stirring chamber 13, the interior of the lower box body 2 is a filter chamber 22, the stirring chamber 13 and the filter chamber 22 are connected, wherein the top of the upper box body 1 is connected with a water inlet pipe 11 and a dosing pipe 12 for sewage and chemical agents to flow into the stirring chamber 13 respectively, and a stirring mechanism for mixing sewage and chemicals is also provided in the stirring chamber 13, specifically, the stirring mechanism includes a rotating shaft 3 rotatably connected to the top of the upper box body 1, a plurality of stirring rods 31 are fixed on the rotating shaft 3, a mounting shaft 32 is fixed to the free end of the stirring rod 31, a plurality of stirring blades 33 are fixed circumferentially of the mounting shaft 32, wherein the stirring blades 33 are provided with through holes. In this solution, the stirring rod 31 rotates with the rotating shaft 3. The stirring rod 31 can stir the sewage and the medicine during the rotation. The stirring blade 33 is fixed to the free end of the stirring rod 31. The stirring blade 33 can rotate synchronously with the stirring rod 31 when the stirring rod 31 rotates. Because the stirring blade 33 is close to the side wall of the upper box body 1, the sewage and the medicine near the upper box wall can be fully stirred during the rotation of the stirring blade 33, ensuring that the sewage and the medicine can be evenly mixed and the mixing effect is good.

[0024] After the sewage and the reagent are stirred in the stirring chamber 13, they are mixed to form flocculent sediments. The sediments will naturally settle to the filter chamber 22 under the action of gravity. However, due to the excessive disturbance of the water flow during the stirring process of the stirring mechanism, the settled substances are easily stirred again and resuspended in the water, resulting in an increase in the sedimentation time. Therefore, in this solution, a number of sedimentation plates 4 are arranged in the filter chamber 22 to reduce the disturbance of the water flow. Specifically, the plurality of sedimentation plates 4 are fixed on the upper part of the lower box 2, and the plurality of sedimentation plates 4 are parallel to each other and arranged at intervals along the horizontal direction of the lower box 2. By installing a plurality of sedimentation plates 4 in the filter chamber 22, the plurality of sedimentation plates 4 can divide the entire filter chamber 22 into a plurality of narrow filter channels. Since the narrow channel has a small cross-sectional area and a small cross-sectional area for the fluid to pass through, when the fluid is confined in a small space, the opportunity for lateral movement is reduced, and the disturbance of the water flow can be suppressed, so that the sediment in the filter channel can be more stably settled to the bottom, which is conducive to the stable settlement of the sediment and shortens the sedimentation time. Among them, the upper part of the sedimentation plate 4 is an inclined plate, and the lower part is a vertical plate. By setting the upper part of the sedimentation plate 4 as an inclined plate, the angle of the inclined plate itself can block the direct impact of the water flow, which can further reduce the impact of water flow disturbance, so that the sediment can settle stably and further improve the sedimentation efficiency.

[0025] The bottom of the filter screen 5 is provided with a filter screen 5. After the sediment settles to the filter channel, the solid sediment is retained on the filter plate, and the filtrate flows to the bottom of the filter screen 5. The lower part of the box is connected with an outlet pipe 21, and the outlet pipe 21 is located below the filter screen 5, and the filtrate can flow out from the outlet pipe 21. Specifically, the two side walls of the box are respectively provided with slide grooves to cooperate with the two side edges of the filter screen 5. The two side edges of the filter screen 5 are slidably connected to the slide grooves. A sewage outlet is provided on one side of the lower part of the box corresponding to the position of the filter screen 5. The sewage outlet is equipped with a sewage discharge door 7. After the sewage treatment is completed, the sewage discharge door 7 can be opened, and then the filter screen 5 is slid out of the sewage discharge port to clean the sediment on the filter plate. Among them, the outer side of the sewage discharge port is provided with a circle of sealing strips 6 along its circumference. When the sewage discharge door 7 is closed, the sealing strips 6 can ensure the sealing between the sewage discharge port and the sewage discharge door 7, so as to ensure that the entire box can remain sealed and prevent liquid from flowing out.

[0026] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A mixing device for sewage treatment, comprising a box body, in which a stirring mechanism is arranged, characterized in that: The box body is provided with a mixing chamber and a filtering chamber connected in sequence from top to bottom. The mixing mechanism is arranged in the mixing chamber for mixing the medicine. A plurality of mutually parallel sedimentation plates are arranged at intervals in the horizontal direction in the filtering chamber, and the upper part of the sedimentation plate is an inclined plate.

2. The mixing device for sewage treatment according to claim 1, characterized in that: A filter screen is arranged below the sedimentation plate and is slidably connected to the box body. A sewage outlet is opened on one side of the lower part of the box body, and a sewage outlet is provided with a sewage door. The filter screen can slide out from the sewage outlet to clean up the sediment.

3. The mixing device for sewage treatment according to claim 2, characterized in that: A sealing strip is arranged between the sewage outlet and the sewage door.

4. The mixing device for sewage treatment according to claim 2, characterized in that: The lower part of the box body is connected with a water outlet pipe, and the water outlet pipe is located below the filter screen.

5. The mixing device for sewage treatment according to claim 1, characterized in that: The stirring mechanism comprises a rotating shaft rotatably connected to the box body, a plurality of stirring rods are arranged on the rotating shaft, a mounting shaft is fixed to the free end of the stirring rod, and a plurality of stirring blades are arranged around the mounting shaft.

6. The mixing device for sewage treatment according to claim 5, characterized in that: The stirring blade is provided with a through hole.

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