Integrated sedimentation device with enhanced flocculation function

Abstract

The invention relates to an integrated sedimentation device with enhanced flocculation function. The outermost working area of ​​the device is the first flocculation area, the center of the device is the second flocculation area, and the sedimentation area is formed between the two flocculation areas. The first flocculation zone is divided into multiple sections, and there is a micro-flocculation spoiler orifice to promote the formation of flocs; the diameter of the bottom of the second flocculation zone is slightly smaller than that of the upper part, which not only ensures the stability of the flocs but also increases the mud storage area; the sedimentation zone is installed with inclined Plate, the clear water inside the sedimentation area of ​​the inclined plate enters the sump through the water collecting hole, and a free flow is set on the top of the outlet weir to collect the clear water. The present invention adopts the flocculation spoiler hydraulic agitation method in the flocculation process of the circular sedimentation equipment, combined with the inclined plate sedimentation, so that the flocs formed by the device under the condition of small dosage and large change of raw water load are larger and denser. Higher, the removal rate of each index is significantly higher than the conventional process; and the overall volume is significantly reduced, the height of the equipment is significantly reduced, and the cost of water production per unit of water is significantly reduced.

Description

technical field [0001] The invention relates to the technical field of water supply equipment, in particular to a settling equipment with a novel enhanced flocculation device. Background technique [0002] In the long development process, water supply and drainage workers have been committed to the development and research of sedimentation equipment. At present, many types of sedimentation equipment have been developed. These sedimentation equipment are a collection of conventional processes, and their shapes are basically round and square. The sedimentation area of ​​these equipment often has a series of problems such as dead water area and low utilization rate; the applicant developed After the settling equipment with the new inclined plate settling device successfully solved the above problems, there are still some deficiencies in the following aspects: [0003] 1. The applicant has developed two series of sedimentation devices with new inclined plates. They both include...

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Problems solved by technology

For example, if the requirements of flocculation time, floc size and floc density are met, sufficient flocculation space is required, and the equipment is often large in size, high in height, high in cost, and troublesome in operation and management; if the height of the equipment is reduced, Reducing the cost and failing to meet the technical parameter requirements of the flocculation stage, the contradiction between the two limits the development of sedimentation equipment

[0004] 2. In the sedimentation equipment using the new inclined plate sedimentation device with co-current flow, there are firstly uneven water distribution in the sedimentation tank, excessive sludge load in some inclined plate areas, unstable effluent water quality in the sedimentation tank, and the water collection process of the sump tank has a negative effect on the sedimentation. There are problems such as large disturbance in the pond; secondly, in the sedimentation equipment that adopts the downward flow inclined plate sedimentation device, there are problems that the inclined plate setting is not optimized, and the surface load of the sedimentation tank is small

[0005] 3. The water collection device in the inclined plate sedimentation device cannot realize the regulation of the water level in the sedimentation area; first, when the sedimentation area is discharged, the water level in the sedimentation area changes greatly, which will lead to a large change in the water quality of the clear water; second, no matter whether the upward flow or In the downward flow spiral inclined plate sedimentation equipment, the overall water level of the device cannot be adjusted, and the treated water volume cannot be adjusted according to the characteristics of the raw water. The operating conditions of the equipment are single, and the investment utilization rate is low.

[0006] 4. The quality of the raw water used in the test is single; for flocs with different raw water quality, size and density, there is no comparative test of multi-factor optimization of the parameters of the inclined plate setting in the early stage

[0007] 5. The overall height of the equipment is large and the internal water pressure is large, so that the equipment requires a large capital investment from the required materials to processing, installation and operation, and the initial investment cost is high

[0008] 6. Generally, a filter device is installed in the equipment center, and an enhanced filtration process is adopted; the backwash process is difficult to control during operation, the replacement of filter material is almost difficult to achieve, and the replacement of backwash filter heads is difficult to complete. The problems in the filtration process seriously limit the use of sedimentation equipment service life

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