Construction wastewater flocculation concentration tank

Abstract

The application relates to a construction wastewater flocculation concentration tank, which comprises an outer cylindrical tank and an inner conical bottom, the material of the outer cylindrical tank and the inner conical bottom is fiber composite material, the inner conical bottom is arranged in the lower cavity of the outer cylindrical tank, and the top opening of the inner conical bottom is communicated with the cavity of the outer cylindrical tank; the lower wall surface of the outer cylindrical tank is provided with a water injection port and a water outlet below the opening position of the inner conical bottom, the water injection port and the water outlet are arranged at intervals and are respectively communicated with the cavity of the outer cylindrical tank, the water injection port is used for injecting water into the lower cavity of the outer cylindrical tank to keep the stability of the outer cylindrical tank, one side of the top of the outer cylindrical tank is provided with a flow guide part, and the inner conical bottom is provided with a mud outlet part; the construction wastewater flocculation concentration tank can reduce the self weight of the equipment, can improve the on-site installation efficiency through prefabrication, can be hoisted as a whole, is repeatedly practical, and is corrosion resistant.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, specifically to a flocculation and concentration tank for construction wastewater. Background Technology

[0002] In the field of wastewater treatment, flocculation thickening tanks, as key equipment for solid-liquid separation, face significant technical bottlenecks in their traditional manufacturing materials: metal tanks (such as carbon steel and stainless steel) are prone to electrochemical corrosion due to long-term contact with corrosive media, and their lifespan is generally less than 5 years under high salinity or strong acid and alkaline conditions, and even with anti-corrosion coatings, they still face high maintenance costs; concrete structures, although corrosion-resistant, are difficult to transport and install due to their excessive weight (over 20 tons per piece), with on-site pouring cycles lasting 15-30 days and a high risk of joint leakage. Although fiber composite materials have been applied in the field of chemical containers due to their high specific strength (3-5 times that of Q235 steel), broad-spectrum corrosion resistance (pH 1-14), and lightweight properties (density 1.5-2.0 g / cm³), there is still a lack of innovative design for their application in key parts of flocculation thickening tanks. Summary of the Invention

[0003] This application provides a construction wastewater flocculation and concentration tank, which can reduce the weight of the equipment, improve on-site installation efficiency through prefabrication, and can be hoisted as a whole, reused repeatedly, and is corrosion resistant.

[0004] The construction wastewater flocculation and concentration tank provided in this application includes an outer cylindrical tank and an inner conical bottom. Both the outer cylindrical tank and the inner conical bottom are made of fiber composite material. The inner conical bottom is located in the lower cavity of the outer cylindrical tank, and the top opening of the inner conical bottom communicates with the cavity of the outer cylindrical tank. The lower wall of the outer cylindrical tank is provided with a water inlet and a water outlet located below the opening of the inner conical bottom. The water inlet and the water outlet are arranged at intervals and communicate with the cavity of the outer cylindrical tank respectively. The water inlet is used to inject water into the lower cavity of the outer cylindrical tank to maintain the stability of the outer cylindrical tank. A flow guide is provided on one side of the top of the outer cylindrical tank, and a sludge outlet is provided on the inner conical bottom.

[0005] In addition, the construction wastewater flocculation and concentration tank provided in this application may also have the following additional technical features:

[0006] In one optional embodiment, the flow guiding section includes a horizontal flow guiding channel and a vertical flow guiding cylinder. The horizontal flow guiding channel is disposed at the top of the outer cylindrical tank, and a wastewater inlet pipe and a chemical dosing pipe are connected to the horizontal flow guiding channel. The vertical flow guiding cylinder is located inside the cavity of the outer cylindrical tank, and the top of the vertical flow guiding cylinder is connected to the horizontal flow guiding channel. The length of the vertical flow guiding cylinder extends along the axial direction of the outer cylindrical tank by a predetermined length, and multiple baffles are spaced and inclined on the inner wall of the vertical flow guiding cylinder.

[0007] In one alternative embodiment, the flow guide further includes an overflow weir, a clear water pipe, and an inclined pipe area. The overflow weir is disposed within the cavity of the outer cylindrical tank and is located near the top of the cavity of the outer cylindrical tank. The clear water pipe is connected to the cavity of the outer cylindrical tank for discharging the flocculated clear water. The inclined pipe area is located on one side of the bottom of the overflow weir and includes multiple inclined pipes arranged at intervals.

[0008] In one alternative embodiment, the guide section includes a spiral blade and a bottom sludge outlet pipe. The spiral blade is movably disposed within the cavity of the inner conical bottom, and the bottom sludge outlet pipe communicates with the cavity of the inner conical bottom and extends to the outside of the outer cylindrical tank.

[0009] In one alternative embodiment, a cylindrical connecting wall is provided on one side of the top of the inner conical bottom. The connecting wall has a predetermined length in the axial direction of the outer cylindrical tank, and the inner conical bottom is fixedly connected to the inner wall of the outer cylindrical tank through the connecting wall.

[0010] The beneficial effects of this application are as follows:

[0011] In the construction wastewater flocculation and thickening tank of this application, both the outer cylindrical tank and the inner conical bottom are made of fiber composite materials, which reduces the self-weight, enabling prefabrication at the plant and on-site hoisting for use, shortening the construction period. Furthermore, the fiber composite material is more corrosion-resistant, which can extend the service life of the construction wastewater flocculation and thickening tank to a certain extent. In addition, the method of injecting water into the outer cylindrical tank through the water inlet can replace the traditional steel structure foundation at the bottom of the thickening tank, increasing stability and improving structural safety.

[0012] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of the construction wastewater flocculation and concentration tank provided in this application in a specific embodiment;

[0014] Figure 2 for Figure 1 A cross-sectional view of the construction wastewater flocculation and concentration tank at point AA.

[0015] Figure 3 for Figure 1 A cross-sectional view of the construction wastewater flocculation and concentration tank at point BB.

[0016] Reference numerals: 1. Outer cylindrical tank; 2. Inner conical bottom; 3. Water inlet; 4. Water outlet; 5. Horizontal guide channel; 6. Vertical guide tube; 7. Wastewater inlet pipe; 8. Chemical dosing pipe; 9. Baffle; 10. Overflow weir; 11. Clean water pipe; 12. Inclined pipe area; 13. Spiral blade; 14. Bottom sludge outlet pipe; 15. Connecting wall.

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0018] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0019] It should be understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other technical solutions obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0021] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0022] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when referring to an element being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element.

[0023] like Figure 1-3As shown in the figure, this application embodiment provides a construction wastewater flocculation and concentration tank, which mainly includes an outer cylindrical tank 1 and an inner conical bottom 2. Both the outer cylindrical tank 1 and the inner conical bottom 2 are made of fiber composite material. The inner conical bottom 2 is located in the lower cavity of the outer cylindrical tank 1, and the top opening of the inner conical bottom 2 is connected to the cavity of the outer cylindrical tank 1. The lower wall of the outer cylindrical tank 1 is provided with a water inlet 3 and a water outlet 4 located below the opening of the inner conical bottom 2. The water inlet 3 and the water outlet 4 are arranged at intervals and are respectively connected to the cavity of the outer cylindrical tank 1. The water inlet 3 is used to inject water into the lower cavity of the outer cylindrical tank 1 to maintain the stability of the outer cylindrical tank 1. A guide section is provided on one side of the top of the outer cylindrical tank 1, and a sludge outlet section is provided on the inner conical bottom 2.

[0024] In this embodiment, the outer cylindrical tank 1 is provided with a water inlet 3 near the inner conical bottom 2. The water inlet 3 is opened on the wall of the outer cylindrical tank 1 and connected to a pipe valve for injecting clean water to ensure the stability of the tank. After the bottom of the tank is filled with water, the valve of the water inlet 3 is closed. The water outlet 4 at the bottom of the outer cylindrical tank 1 is connected to a pipe valve for draining water to reduce weight when the tank needs to be moved to a different location.

[0025] In this embodiment, the outer cylindrical tank 1 and the inner conical bottom 2 of the construction wastewater flocculation and concentration tank are both made of fiber composite materials, which reduces the weight and allows for prefabrication at the plant site and on-site hoisting, shortening the construction period. Furthermore, the fiber composite material is more corrosion-resistant, which can extend the service life of the construction wastewater flocculation and concentration tank to some extent. In addition, the method of injecting water into the outer cylindrical tank 1 through the water inlet 3 can replace the traditional steel structure foundation at the bottom of the concentration tank, increasing stability and improving structural safety.

[0026] like Figure 1-2 As shown, in one specific embodiment, the flow guiding section includes a horizontal flow guiding channel 5 and a vertical flow guiding cylinder 6. The horizontal flow guiding channel 5 is located at the top of the outer cylindrical tank 1, and a wastewater inlet pipe 7 and a chemical dosing pipe 8 are connected to the horizontal flow guiding channel 5. The vertical flow guiding cylinder 6 is located inside the cavity of the outer cylindrical tank 1, and its top is connected to the horizontal flow guiding channel 5. The length of the vertical flow guiding cylinder 6 extends a predetermined length along the axial direction of the outer cylindrical tank 1, and multiple baffles 9 are spaced and inclined on the inner wall of the vertical flow guiding cylinder 6. The horizontal flow guiding channel 5 can mix the water and flocculant from the wastewater inlet pipe 7 and the chemical dosing pipe 8. After mixing, the mixture enters the vertical flow guiding cylinder 6 at a certain flow rate. The baffles 9 in the flow guiding cylinder reduce the water velocity and fully exert the chemical effect. Since the wastewater is in a state of mud-water separation after chemical dosing, the mud is in flocculent form and enters the inner conical bottom 2 for flocculation by gravity sedimentation.

[0027] like Figure 1-3As shown, in one specific embodiment, the guide section further includes an overflow weir 10, a clear water pipe 11, and an inclined tube area 12. The overflow weir 10 is disposed within the cavity of the outer cylindrical tank 1, and the overflow weir 10 is close to the top of the cavity of the outer cylindrical tank 1. The clear water pipe 11 is connected to the cavity of the outer cylindrical tank 1 for discharging the flocculated clear water. The inclined tube area 12 is located on one side of the bottom of the overflow weir 10, and the inclined tube area 12 includes multiple inclined tubes arranged at intervals. The clear water after mud-water separation exits from the top overflow weir 10, first passing through the inclined tube area 12, where some of the suspended particles are settled to the bottom, thereby ensuring clearer effluent.

[0028] like Figure 1-2 As shown, in one specific embodiment, the guide section includes a spiral blade 13 and a bottom sludge outlet pipe 14. The spiral blade 13 is movably disposed within the cavity of the inner conical bottom 2, and the bottom sludge outlet pipe 14 communicates with the cavity of the inner conical bottom 2 and extends to the outside of the outer cylindrical tank 1. In this embodiment, the spiral blade 13 is disposed within the inner conical bottom 2. The spiral blade 13 can rotate relative to the inner conical bottom 2, thereby enabling non-powered stirring under the action of water velocity, which prevents the bottom sludge from accumulating. The sludge at the bottom collects at the bottom under the action of the inner conical bottom 2 and finally exits through the bottom sludge outlet pipe 14. Specifically, the sludge at the bottom is pumped by a slurry pump connected to the bottom sludge outlet pipe 14, which drives the spiral blade 13 to move, preventing the bottom sludge from accumulating. The bottom sludge outlet pipe 14 is a non-powered device.

[0029] In addition, a cylindrical connecting wall 15 is provided on one side of the top of the inner conical bottom 2. The connecting wall 15 has a preset length in the axial direction of the outer cylindrical tank 1. The inner conical bottom 2 is fixedly connected to the inner wall of the outer cylindrical tank 1 through the connecting wall 15. For example, the two can be connected by adhesive bonding. Of course, other methods can also be used for fixed connection, which is not specifically limited in this article.

[0030] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A construction wastewater flocculation and concentration tank, characterized in that, The device includes an outer cylindrical tank and an inner conical bottom, both made of fiber composite material. The inner conical bottom is located in the lower cavity of the outer cylindrical tank, and its top opening communicates with the cavity of the outer cylindrical tank. The lower wall of the outer cylindrical tank has a water inlet and a water outlet located below the opening of the inner conical bottom. The water inlet and the water outlet are spaced apart and communicate with the cavity of the outer cylindrical tank. The water inlet is used to inject water into the lower cavity of the outer cylindrical tank to maintain its stability. A guide section is provided on one side of the top of the outer cylindrical tank, and a sludge outlet is provided on the inner conical bottom.

2. The construction wastewater flocculation and concentration tank according to claim 1, characterized in that, The flow guiding section includes a horizontal flow guiding channel and a vertical flow guiding cylinder. The horizontal flow guiding channel is located at the top of the outer cylindrical tank, and a wastewater inlet pipe and a chemical dosing pipe are connected to the horizontal flow guiding channel. The vertical flow guiding cylinder is located inside the cavity of the outer cylindrical tank. The top of the vertical flow guiding cylinder is connected to the horizontal flow guiding channel. The length of the vertical flow guiding cylinder extends a predetermined length along the axial direction of the outer cylindrical tank, and multiple baffles are spaced and inclined on the inner wall of the vertical flow guiding cylinder.

3. The construction wastewater flocculation and concentration tank according to claim 2, characterized in that, The flow guiding section also includes an overflow weir, a clear water pipe, and an inclined pipe area. The overflow weir is located inside the cavity of the outer cylindrical tank and is close to the top of the cavity of the outer cylindrical tank. The clear water pipe is connected to the cavity of the outer cylindrical tank to discharge the clear water after flocculation. The inclined pipe area is located on one side of the bottom of the overflow weir and includes multiple inclined pipes arranged at intervals.

4. The construction wastewater flocculation and concentration tank according to any one of claims 1-3, characterized in that, The flow guide includes a spiral blade and a bottom mud outlet pipe. The spiral blade is movably disposed in the cavity of the inner conical bottom, and the bottom mud outlet pipe communicates with the cavity of the inner conical bottom and extends to the outside of the outer cylindrical tank.

5. The construction wastewater flocculation and concentration tank according to claim 4, characterized in that, A cylindrical connecting wall is provided on one side of the top of the inner conical bottom. The connecting wall has a preset length in the axial direction of the outer cylindrical tank. The inner conical bottom is fixedly connected to the inner wall of the outer cylindrical tank through the connecting wall.

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