Polyaluminum chloride sedimentation tank

Abstract

A kind of polyaluminium chloride sedimentation tank, it is characterized in that including sedimentation tank body 41 and screw conveyor 42, sedimentation tank body 41 bottom is provided with sewage recess 43, sewage recess 43 one side is provided with water inlet slope 44, sewage recess 43 other side is provided with settlement slope 45, screw conveyor 42 is installed in sewage recess 43, one end of sedimentation tank body 41 is provided with sedimentation inlet pipe 46, the other end of sedimentation tank body 41 is provided with upper liquid discharge pipe 47;Advantages are: by screw conveyor auxiliary discharge, sediment discharge speed is fast, not easy to block, reduce maintenance cost.Supernatant is filtered after secondary filtration by filter screen and enters supernatant area, further reduce the impurities in supernatant.

Description

Technical Field

[0001] This utility model relates to the field of sedimentation tanks, specifically to a polyaluminum chloride sedimentation tank. Background Technology

[0002] Currently, polyaluminum chloride (PAC) is available in two types: one for drinking water and one for industrial water, each adhering to different relevant standards. It appears yellow or light yellow, dark brown, or dark gray, and exists in both liquid and solid forms. This product has strong bridging and adsorption properties, and during hydrolysis, it undergoes physicochemical processes such as coagulation, adsorption, and precipitation. The fundamental difference between PAC and traditional inorganic coagulants lies in the structure: traditional inorganic coagulants are low-molecular-weight crystalline salts, while PAC is composed of multi-component carboxyl complexes with varying morphologies. It exhibits rapid flocculation and sedimentation, a wide applicable pH range, no corrosiveness to pipes and equipment, and significant water purification effects. This product is widely used in drinking water, industrial water, and wastewater treatment. PAC solution is formed by mixing aluminum trichloride and calcium aluminate. The PAC solution requires sedimentation followed by pressure filtration and finally drying. Existing sedimentation tanks often experience clogging of the discharge port during sediment removal, resulting in slow discharge speeds. When the PAC solution is introduced into the sedimentation tank, the strong water flow can easily cause untreated solution to be directly injected into the clear liquid area. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned shortcomings by providing a polyaluminum chloride sedimentation tank.

[0004] This utility model includes a sedimentation tank and a screw conveyor. The bottom of the sedimentation tank is provided with a sludge discharge groove, one side of the sludge discharge groove is provided with a water inlet slope, and the other side of the sludge discharge groove is provided with a settling slope. The screw conveyor is installed in the sludge discharge groove. One end of the sedimentation tank is provided with a sedimentation liquid inlet pipe, and the other end of the sedimentation tank is provided with an upper liquid discharge pipe.

[0005] The sewage discharge groove has a U-shaped cross-section, and a sewage discharge pipe is provided at the bottom of one end of the sewage discharge groove. The screw blades of the screw conveyor are located inside the sewage discharge groove.

[0006] The screw conveyor is a shaftless screw conveyor.

[0007] The outlet end of the sedimentation inlet pipe is equipped with a pair of branch outlet pipes, and the outlet end of the branch outlet pipes is connected to the inner cavity of the sedimentation tank.

[0008] The sedimentation tank is equipped with a bottom baffle and a top baffle. The bottom baffle is installed on the settling slope, and the top baffle is installed on the inner wall of the sedimentation tank. A filtration area is formed between the bottom baffle and the top baffle. A flow area is formed between the bottom of the top baffle and the settling slope. A supernatant area is formed between the top baffle and the inner wall of the sedimentation tank. The supernatant discharge pipe is installed in the supernatant area.

[0009] A drain outlet is provided at the bottom of the filtration area.

[0010] A filter screen is installed at the top of the bottom baffle.

[0011] The sedimentation tank is located above the bottom baffle. Filter screen mounting slots are provided on the inner walls of both sides of the tank. Filter screens are inserted into a pair of filter screen mounting slots.

[0012] A baffle plate is installed on the inner wall above the middle part of the sedimentation tank, and the baffle plate is inclined toward the sedimentation inlet pipe.

[0013] The advantages of this invention are: With the assistance of a screw conveyor, the sediment is discharged quickly, is less prone to clogging, and reduces maintenance costs. The supernatant enters the supernatant area after secondary filtration through a filter screen, further reducing impurities in the supernatant. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of the screw conveyor of this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of the embodiments of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, if terms such as "first" or "second" appear in the description of this invention, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0022] As shown in the attached drawings, this utility model includes a sedimentation tank body 41 and a screw conveyor 42. The bottom of the sedimentation tank body 41 is provided with a sludge discharge groove 43. A water inlet slope 44 is provided on one side of the sludge discharge groove 43, and a settling slope 45 is provided on the other side of the sludge discharge groove 43. The screw conveyor 42 is installed in the sludge discharge groove 43. A sedimentation liquid inlet pipe 46 is provided at one end of the sedimentation tank body 41, and an upper liquid discharge pipe 47 is provided at the other end of the sedimentation tank body 41.

[0023] The cross-section of the sewage discharge groove 43 is U-shaped, and a sewage discharge pipe is provided at the bottom of one end of the sewage discharge groove 43. The spiral blades of the screw conveyor 42 are located inside the sewage discharge groove 43.

[0024] Screw conveyor 42 is a shaftless screw conveyor.

[0025] The outlet end of the sedimentation inlet pipe 46 is provided with a pair of branch drain pipes, and the outlet end of the branch drain pipes is connected to the inner cavity of the sedimentation tank body 41.

[0026] The sedimentation tank 41 is equipped with a bottom baffle 48 and a top baffle 49. The bottom baffle 48 is installed on the settling slope 45, and the top baffle 49 is installed on the inner wall of the sedimentation tank 41. A filtration area 50 is formed between the bottom baffle 48 and the top baffle 49. A flow area is formed between the bottom of the top baffle 49 and the settling slope 45. A supernatant area 51 is formed between the top baffle 49 and the inner wall of the sedimentation tank 41. An upper liquid discharge pipe 47 is installed in the supernatant area 51.

[0027] A drain outlet is provided at the bottom of the filtration area 50.

[0028] A filter screen 52 is provided on the top of the bottom baffle 48.

[0029] The sedimentation tank body 41 located above the bottom baffle 48 has filter screen mounting slots on both sides of its inner wall, and filter screens 52 are inserted into a pair of filter screen mounting slots.

[0030] A baffle plate 53 is installed on the inner wall above the middle part of the sedimentation tank 41, and the baffle plate 53 is inclined toward the sedimentation inlet pipe 46.

[0031] Example 1: Turbid polyaluminum chloride (PAC) solution is fed into sedimentation tank 41 through sedimentation inlet pipe 46. The PAC solution settles within sedimentation tank 41, and the supernatant is filtered through filter screen 52 and then fed into filtration zone 50. The supernatant in filtration zone 50 is blocked by top baffle 49 and enters supernatant zone 51 from below. The upper layer of PAC solution in supernatant zone 51 is discharged to a lower station through upper liquid discharge pipe 47. When it is necessary to discharge the sediment at the bottom of sedimentation tank 41, screw conveyor 42 is started. The screw conveyor 42 continuously agitates the sediment and moves it towards the drain pipe, through which it is discharged. A pair of branch drain pipes are provided at the outlet end of sedimentation inlet pipe 46 to ensure that the outflow of PAC solution during feeding flows more evenly towards bottom baffle 48, reducing water flow impact. When the water flow rate is high during feeding, the turbid polyaluminum chloride liquid above is blocked by the baffle plate 53 and directly enters the filter screen 52. The screw conveyor 42 is a shaftless screw conveyor, which is less prone to clogging compared to screw conveyors with a through shaft.

Claims

1. A polyaluminum chloride sedimentation tank, characterized in that... The settling tank includes a sedimentation tank body (41) and a screw conveyor (42). The bottom of the sedimentation tank body (41) is provided with a sludge discharge groove (43). A water inlet slope (44) is provided on one side of the sludge discharge groove (43), and a settling slope (45) is provided on the other side of the sludge discharge groove (43). The screw conveyor (42) is installed in the sludge discharge groove (43). A sedimentation liquid inlet pipe (46) is provided at one end of the sedimentation tank body (41), and an upper liquid discharge pipe (47) is provided at the other end of the sedimentation tank body (41).

2. The polyaluminum chloride sedimentation tank according to claim 1, characterized in that, The cross-section of the sewage discharge groove (43) is U-shaped. A sewage discharge pipe is provided at the bottom of one end of the sewage discharge groove (43), and the spiral blades of the screw conveyor (42) are located inside the sewage discharge groove (43).

3. The polyaluminum chloride sedimentation tank according to claim 1, characterized in that, The screw conveyor (42) is a shaftless screw conveyor.

4. The polyaluminum chloride sedimentation tank according to claim 1, characterized in that, The outlet end of the sedimentation inlet pipe (46) is provided with a pair of branch drain pipes, and the outlet end of the branch drain pipes is connected to the inner cavity of the sedimentation tank (41).

5. A polyaluminum chloride sedimentation tank according to claim 1, characterized in that, The sedimentation tank (41) is equipped with a bottom baffle (48) and a top baffle (49). The bottom baffle (48) is installed on the settling slope (45), and the top baffle (49) is installed on the inner wall of the sedimentation tank (41). A filtration area (50) is formed between the bottom baffle (48) and the top baffle (49). A flow area is formed between the bottom of the top baffle (49) and the settling slope (45). A supernatant area (51) is formed between the top baffle (49) and the inner wall of the sedimentation tank (41). The supernatant discharge pipe (47) is installed in the supernatant area (51).

6. The polyaluminum chloride sedimentation tank according to claim 5, characterized in that, A drain outlet is provided at the bottom of the filtration area (50).

7. A polyaluminum chloride sedimentation tank according to claim 6, characterized in that, A filter screen (52) is provided on the top of the bottom baffle (48).

8. A polyaluminum chloride sedimentation tank according to claim 7, characterized in that, The sedimentation tank body (41) located above the bottom baffle (48) has filter screen mounting slots on both sides of its inner wall, and the filter screen (52) is inserted into a pair of filter screen mounting slots.

9. A polyaluminum chloride sedimentation tank according to claim 1, characterized in that, A baffle plate (53) is installed on the inner wall above the middle part of the sedimentation tank (41), and the baffle plate (53) is inclined toward the sedimentation inlet pipe (46).

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