PAC dosing device for sewage treatment

Abstract

The utility model relates to the technical field of PAC dosing, in particular to a sewage treatment PAC dosing device which comprises a dosing tank, a controller and a mounting seat, a servo motor is mounted at the top of the dosing tank, and a connecting roller penetrating through the dosing tank is fixedly connected to the tail end of an output shaft of the servo motor. The outer side of the connecting roller is fixedly connected with a connecting shaft rod with the same length, the side, away from the connecting roller, of the connecting shaft rod is fixedly connected with a scraping plate, one side of the dosing tank is connected with a discharging pipe, a metering pump is installed on the outer side of the discharging pipe, and a feeding port of the metering pump is communicated with the discharging pipe. Through a structure composed of a connecting roller, a connecting shaft rod, a scraping plate and the like, a rotating shaft of a servo motor can drive the connecting roller to rotate, the connecting roller rotates to drive the connecting shaft rod and the scraping plate to rotate, the scraping plate acts on the inner wall of the dosing tank, and PAC powder possibly attached to the inner wall of the dosing tank is scraped away.

Description

Technical Field

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

[0002] Polyaluminium chloride (PAC) is an inorganic substance, an emerging water purification material and an inorganic polymer coagulant, referred to as polyaluminium. PAC has strong adsorption properties. During the hydrolysis process, it is accompanied by physical and chemical processes such as coagulation, adsorption and precipitation. Polyaluminium chloride can effectively remove SS, COD, BOD and heavy metal ions such as arsenic and mercury in water. This product is widely used in the fields of drinking water, industrial water and sewage treatment. A sewage treatment PAC dosing device is usually used to treat sewage through PAC.

[0003] A common PAC dosing device for sewage treatment requires adding an appropriate amount of water and PAC powder into a dosing tank, then starting the motor for stirring. After the stirring is completed, the metering pump is turned on to add PAC liquid to the sewage. When the PAC dosing device stirs the PAC powder, the PAC powder may adhere to the inner wall of the dosing tank, which is inconvenient for cleaning and production, and may also affect the concentration and quality of the liquid. Therefore, a PAC dosing device for sewage treatment is proposed to address the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a PAC dosing device for sewage treatment to solve the problems raised in the above background technology.

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

[0006] A PAC dosing device for sewage treatment comprises a dosing tank, a controller and a mounting base, wherein a servo motor is mounted on the top of the dosing tank, the end of the output shaft of the servo motor is fixedly connected to a connecting roller that passes through the dosing tank, a bearing is provided on the end of the connecting roller away from the output shaft of the servo motor, the bearing comprises an inner ring and an outer ring that rotate relatively, the connecting roller is fixedly connected to the inner ring of the bearing, the outer ring of the bearing is fixedly connected to the inner wall of the dosing tank, the outer side of the connecting roller is fixedly connected to stirring impellers that are evenly arranged, the outer side of the connecting roller is fixedly connected to a connecting shaft of equal length, a scraper is fixedly connected to the side of the connecting shaft away from the connecting roller, a discharge pipe is connected to one side of the dosing tank, a metering pump is mounted on the outside of the discharge pipe, the inlet of the metering pump is connected to the discharge pipe, the discharge port of the metering pump is connected to a connecting pipe that discharges the stirred PAC solution into the sewage, and a feed pipe is fixedly connected to the top of the dosing tank, the feed pipe passes through the dosing tank.

[0007] Preferably, the dosing tank is mounted on the upper end surface of the mounting seat, the controller is mounted on the upper end surface of the mounting seat, and the controller is electrically connected to the servo motor and the metering pump.

[0008] Preferably, one end of the feed pipe disposed inside the dosing tank is connected to an annular distribution shell, and the bottom of the annular distribution shell is connected to a plurality of distribution pipes with equal diameters, and the plurality of distribution pipes are evenly arranged.

[0009] Preferably, the annular material distribution shell is sleeved on the outside of the connecting roller and is rotatably connected to the connecting roller, and the annular material distribution shell is fixedly connected to the inner wall of the dosing tank.

[0010] Preferably, the scrapers are arranged in an equiangular array with the same center, and the scrapers fit the inner wall of the dosing tank.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. In the present invention, the structure consisting of the connecting roller, the connecting shaft and the scraper is provided. The rotating shaft of the servo motor drives the connecting roller to rotate, and the rotation of the connecting roller drives the connecting shaft and the scraper to rotate. The scraper acts on the inner wall of the dosing tank to scrape off the PAC powder that may be attached to the inner wall of the dosing tank.

[0013] 2. In the present invention, the structure composed of an annular distribution shell and a distribution pipe is provided. The PAC powder enters the annular distribution shell from the feed pipe and then leaves the annular distribution shell from the distribution pipe. There are several distribution pipes and they are evenly arranged, so that the PAC powder can fall evenly into the dosing tank and mix with the aqueous solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 For this utility model Figure 1 Schematic diagram of the structure at A;

[0016] Figure 3 This is a schematic diagram of the installation structure of the material distribution shell of the utility model;

[0017] Figure 4 This is a schematic diagram of the scraper installation structure of the utility model.

[0018] In the figure: 1. Dosing tank; 2. Servo motor; 3. Connecting roller; 4. Bearing; 5. Mixing impeller; 6. Connecting shaft; 7. Scraper; 8. Feed pipe; 9. Annular distribution shell; 10. Distribution pipe; 11. Discharge pipe; 12. Metering pump; 13. Connecting pipe; 14. Controller; 15. Mounting base. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0022] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0023] For ease of description, spatially relative terms such as "above", "above", "on the upper surface", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the figures is inverted, the device described as "above" or "on top of" other devices or structures will be later positioned as "below" or "below" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein will be interpreted accordingly.

[0024] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0025] See also Figure 1-4 , the utility model provides a technical solution:

[0026] A PAC dosing device for sewage treatment, comprising a dosing tank 1, a controller 14 and a mounting base 15. A servo motor 2 is mounted on the top of the dosing tank 1. The end of the output shaft of the servo motor 2 is fixedly connected to a connecting roller 3 that passes through the dosing tank 1. A bearing 4 is provided at the end of the connecting roller 3 away from the output shaft of the servo motor 2. The bearing 4 consists of an inner ring and an outer ring that rotate relatively. The connecting roller 3 is fixedly connected to the inner ring of the bearing 4, and the outer ring of the bearing 4 is fixedly connected to the inner wall of the dosing tank 1. The outer side of the connecting roller 3 is fixedly connected to a uniformly arranged A stirring impeller 5 is provided, a connecting shaft 6 of equal length is fixedly connected to the outside of the connecting roller 3, a scraper 7 is fixedly connected to the side of the connecting shaft 6 away from the connecting roller 3, a discharge pipe 11 is connected to one side of the dosing tank 1, a metering pump 12 is installed on the outside of the discharge pipe 11, the inlet of the metering pump 12 is connected to the discharge pipe 11, and the discharge port of the metering pump 12 is connected to a connecting pipe 13 for discharging the stirred PAC solution into the sewage, and a feed pipe 8 is fixedly connected to the top of the dosing tank 1, and the feed pipe 8 runs through the dosing tank 1.

[0027] The dosing tank 1 is mounted on the upper end surface of the mounting base 15, and the controller 14 is mounted on the upper end surface of the mounting base 15. The controller 14 is electrically connected to the servo motor 2 and the metering pump 12. This arrangement enables the positioning of the controller 14 and the dosing tank 1, and indicates that the controller 14 can control the use of the servo motor 2 and the metering pump 12; the feed pipe 8 is arranged at one end inside the dosing tank 1 and is connected to an annular material distribution shell 9, and the bottom of the annular material distribution shell 9 is connected to a plurality of material distribution pipes 10 of equal diameter, and the plurality of material distribution pipes 10 are evenly arranged. This arrangement allows the aqueous solution and PA to be uniformly distributed. The PAC powder can enter the annular distribution housing 9 from the feed pipe 8 in sequence, and then separate from the annular distribution housing 9 from the distribution pipe 10; the annular distribution housing 9 is sleeved on the outside of the connecting roller 3 and is rotatably connected to the connecting roller 3. The annular distribution housing 9 is fixedly connected to the inner wall of the dosing tank 1. This arrangement allows the PAC powder to fall evenly into the dosing tank 1; the scrapers 7 are arranged in an equiangular array with the same center, and the scrapers 7 are in contact with the inner wall of the dosing tank 1. This arrangement allows the scrapers 7 to act on the inner wall of the dosing tank 1 to scrape off any PAC powder that may be attached to the inner wall of the dosing tank 1.

[0028] Working process: All electrical appliances in the present invention are equipped with an external power supply or an internal battery. When the sewage treatment PAC dosing device is used to treat sewage, the aqueous solution and PAC powder are sequentially fed from the feed pipe 8 into the annular distribution housing 9, and then separated from the annular distribution housing 9 from the distribution pipe 10. There are several distribution pipes 10 and they are evenly arranged so that the PAC powder can fall evenly into the dosing tank 1. The servo motor 2 is started by the controller 14 installed on the mounting seat 15. The rotating shaft of the servo motor 2 drives the connecting roller 3 to rotate, and the inner of the connecting roller 3 and the bearing 4 are connected. The connecting roller 3 rotates relative to the outer ring of the bearing 4, and the rotation of the connecting roller 3 drives the connecting shaft 6 and the stirring impeller 5 to rotate. The rotation of the stirring impeller 5 can stir the PAC powder and the aqueous solution to make them fully mixed. The rotation of the connecting shaft 6 drives the scraper 7 to rotate. The scraper 7 acts on the inner wall of the dosing tank 1 to scrape off the PAC powder that may be attached to the inner wall of the dosing tank 1. When sufficient mixing is completed, the metering pump 12 is started by the controller 14. The metering pump 12 extracts the solution in the dosing tank 1 through the discharge pipe 11 and acts on the sewage through the connecting pipe 13 to treat the sewage.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PAC dosing device for sewage treatment, comprising a dosing tank (1), a controller (14) and a mounting base (15), characterized in that: A servo motor (2) is installed on the top of the dosing tank (1), and the end of the output shaft of the servo motor (2) is fixedly connected to a connecting roller (3) that passes through the dosing tank (1), and a bearing (4) is provided at one end of the connecting roller (3) away from the output shaft of the servo motor (2), and the bearing (4) is composed of an inner ring and an outer ring that rotate relatively, and the connecting roller (3) is fixedly connected to the inner ring of the bearing (4), and the outer ring of the bearing (4) is fixedly connected to the inner wall of the dosing tank (1), and the outer side of the connecting roller (3) is fixedly connected to a stirring impeller (5) that is evenly arranged. A connecting shaft (6) of equal fixed connection length is provided, a scraper (7) is fixedly connected to the side of the connecting shaft (6) away from the connecting roller (3), a discharge pipe (11) is connected to one side of the dosing tank (1), a metering pump (12) is installed on the outside of the discharge pipe (11), the feed port of the metering pump (12) is connected to the discharge pipe (11), the discharge port of the metering pump (12) is connected to a connecting pipe (13) for discharging the stirred PAC solution into sewage, and a feed pipe (8) is fixedly connected to the top of the dosing tank (1), and the feed pipe (8) passes through the dosing tank (1).

2. A sewage treatment PAC dosing device according to claim 1, characterized in that: The dosing tank (1) is mounted on the upper end surface of the mounting base (15), the controller (14) is mounted on the upper end surface of the mounting base (15), and the controller (14) is electrically connected to the servo motor (2) and the metering pump (12).

3. A PAC dosing device for sewage treatment according to claim 1, characterized in that: One end of the feed pipe (8) disposed inside the dosing tank (1) is connected to an annular distribution shell (9), and the bottom of the annular distribution shell (9) is connected to a plurality of distribution pipes (10) of equal diameter, and the plurality of distribution pipes (10) are evenly arranged.

4. A PAC dosing device for sewage treatment according to claim 3, characterized in that: The annular material distribution shell (9) is sleeved on the outside of the connecting roller (3) and is rotationally connected to the connecting roller (3). The annular material distribution shell (9) is fixedly connected to the inner wall of the dosing tank (1).

5. A PAC dosing device for sewage treatment according to claim 1, characterized in that: The scrapers (7) are arranged in an equiangular array with the same center, and the scrapers (7) are in contact with the inner wall of the dosing tank (1).

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