CN-122010293-A - Suspended mud-water separation device for sewage treatment

CN122010293ACN 122010293 ACN122010293 ACN 122010293ACN-122010293-A

Abstract

The invention relates to the technical field of sewage treatment, in particular to a suspension type mud-water separation device for sewage treatment, which comprises an aerobic tank water inlet pipe, a sludge sinking separation zone, a mud-water separation zone and a clear water outlet weir which are sequentially arranged from bottom to top, a data acquisition module, an operation process judgment module for determining whether the operation stability of the suspension type mud-water separation device is qualified or not based on a granulation degree index, a flocculation quality judgment module for determining whether the quality of the mud flocculation is qualified or not based on the Zeta potential of the mud flocculation in the mud-water separation zone and optimizing the stripping opening degree based on an effective water passing area, a mud quality judgment module for determining whether the treatment capacity of the mud is qualified or not based on the oxygen consumption rate of the mud in the mud-water separation zone, and a mud reduction judgment module for determining whether the mud reduction effect is qualified or not based on the mud yield coefficient of the mud in the aerobic tank so as to optimize a preset granulation index. The invention improves the operation stability of the suspension type mud-water separation device.

Inventors

CHEN XINYI
WEN SHANGLONG
LI CHAOWEI
TAN XIAOXIONG
Yang Tufen

Assignees

江西广深环保装备有限公司

Dates

Publication Date: 20260512
Application Date: 20260401

Claims (10)

1. A suspension type mud-water separation device for sewage treatment, which is characterized by comprising: The device comprises an aerobic tank water inlet pipe, a sludge sinking separation zone, a sludge-water separation zone and a clear water outlet weir which are sequentially arranged from bottom to top, wherein the sludge-water separation zone is communicated with a sludge escape channel, the sludge escape channel is connected to the inlet end of a stripping pipe, and the stripping pipe is provided with a stripping control valve; The data acquisition module comprises a laser particle size distribution sensor for acquiring particle distribution characteristics in sewage, a flow sensor for acquiring real-time overcurrent flow and a dissolved oxygen sensor for determining the oxygen consumption rate of the sludge in the sludge-water separation area; The running process judging module is used for determining whether the running stability of the suspended mud-water separation device is qualified or not based on a comparison result of the granulation degree index of the sewage in the mud-water separation zone and a preset granulation index; the floc quality judging module is used for responding to unqualified running stability, determining whether the quality of the sludge flocs is qualified or not based on Zeta potential of the sludge flocs in the sludge-water separation area, and optimizing the stripping opening of the stripping control valve based on the effective water passing area of the sludge-water separation area under the qualification condition; a sludge quality determination module, responsive to a failure in sludge floc quality, for determining whether a sludge treatment capacity is acceptable based on an oxygen consumption rate of the sludge in the sludge-water separation zone; And a sludge reduction judging module for determining whether the sludge reduction effect is qualified based on the sludge yield coefficient of the aerobic tank so as to optimize the preset granulation index based on the condition that the sludge reduction effect is unqualified.
2. The suspended sludge-water separation apparatus for sewage treatment according to claim 1, wherein the degree of granulation is a weighted sum of a suspended solids concentration coefficient, a median particle diameter coefficient of particles, and a colloidal particle duty coefficient.
3. The suspended sludge-water separation device for sewage treatment according to claim 2, wherein the operation process determination module determines that the operation stability of the suspended sludge-water separation device is not acceptable based on the comparison result that the granulation degree index is greater than the preset granulation index.
4. The suspended sludge-water separation device for sewage treatment according to claim 3, wherein the floc quality determination module determines that the quality of the sludge flocs is not acceptable based on a comparison result that the absolute value of the Zeta potential is greater than a first preset potential or less than a second preset potential under the condition that the operation stability of the suspended sludge-water separation device is not acceptable.
5. The suspended sludge-water separation device for sewage treatment according to claim 3, wherein the floc quality determination module determines that the quality of the sludge flocs is acceptable based on a comparison result that the absolute value of the Zeta potential is less than or equal to a first preset potential and greater than or equal to a second preset potential under the condition that the operation stability of the suspended sludge-water separation device is not acceptable.
6. The suspended sludge-water separation device for sewage treatment according to claim 5, wherein the floc quality judging module sets a plurality of opening adjustment coefficients to optimize the stripping opening of the stripping control valve based on the comparison result of the area ratio of the effective water passing area to the preset water passing area and the preset area ratio under the condition that the quality of the sludge flocs is qualified.
7. The suspended sludge-water separation apparatus for sewage treatment according to claim 4, wherein the sludge quality determination module determines that the sludge treatment capacity is acceptable based on a comparison result that the oxygen consumption rate of the sludge is greater than or equal to a preset rate under the condition that the sludge floc quality is not acceptable.
8. The suspended sludge-water separation device for sewage treatment according to claim 4, wherein the sludge quality determination module determines that the sludge treatment capacity is not acceptable based on a comparison result that the oxygen consumption rate of the sludge is less than a preset rate under the condition that the sludge floc quality is not acceptable; The sludge quality judging module sets a plurality of opening correction coefficients to adjust the stripping opening based on the relative difference between the preset oxygen consumption rate and the oxygen consumption rate.
9. The suspension type mud-water separation apparatus for sewage treatment according to claim 7, wherein the sludge reduction judging module determines that the sludge reduction effect is not acceptable based on the comparison result that the sludge yield coefficient is greater than the preset yield coefficient under the condition that the treatment capacity of the sludge is acceptable.
10. The suspension type mud-water separation apparatus for sewage treatment according to claim 9, wherein the sludge reduction judging module sets a plurality of index adjustment coefficients to increase the preset granulation index based on a result of comparing the sludge yield coefficient with the preset yield coefficient under a condition that the sludge reduction effect is not qualified.

Description

Suspended mud-water separation device for sewage treatment Technical Field The invention relates to the technical field of sewage treatment, in particular to a suspension type mud-water separation device for sewage treatment. Background Along with the increasing severity of global water resource shortage and water pollution problems, sewage treatment has become a key link for ensuring ecological environment and human health, and sludge-water separation is used as a crucial terminal unit in a sewage biological treatment process, and the separation efficiency directly determines the effluent quality and the sludge treatment cost. The traditional mud-water separation mainly relies on a secondary sedimentation tank, although the technology is mature, the defects of large occupied area, weak impact load resistance, sensitive sludge sedimentation performance and the like exist, the mud is easy to produce when the water quality of the inlet water fluctuates or the sludge expands, the treatment effect is unstable, the membrane bioreactor can realize high-efficiency solid-liquid separation and promote the concentration of the sludge, but the membrane assembly is easy to be polluted and blocked, frequent cleaning and replacement are needed, the energy consumption is high, the operation and maintenance cost is high, the membrane service life is short, the requirement on the water quality of the inlet water is strict and the like exist, and other technologies such as air floatation and centrifugal separation respectively face the challenges of high energy consumption, complex equipment, high operation cost and the like. In order to solve the technical bottleneck, the development of a mud-water separation device with the reliability of the traditional process and the high efficiency of the novel technology is urgent, and the suspension type mud-water separation device is developed, realizes solid-liquid separation through a dynamic suspension sludge layer or a suspension medium layer, aims to take advantages of high efficiency interception of sludge, impact load resistance, low energy consumption, easiness in maintenance and the like into consideration, meets the dual requirements of different scale sewage treatment scenes on mud-water separation efficiency and operation stability, and is particularly suitable for a sewage treatment system needing to strengthen sludge interception and backflow regulation and pursuing sludge reduction effect. CN102805956a discloses a vertical pipe type mud-water separation treatment device, which is mainly characterized in that the wall of a tank of a vertical pipe type mud-water separation treatment unit is a pipe wall, the upper part of the tank is a tank top plate, an inspection well is arranged on the tank top plate, the inside of each mud-water separation treatment unit is separated by a space separation plate filler placement plate, suspended filler is arranged below the filler placement plate, a sediment mud guide pipe is arranged on the space separation plate, a water passing hole is arranged on the filler placement plate, the upper opening of a cleaning pipe is arranged at the inspection well part, the lower opening of the cleaning pipe is arranged at the space separation plate, and water inlet and outlet pipes are arranged between the upper part of the tank filler placement plate and the space separation plate. The sediment mud guide pipe is arranged at the sediment hole, and a mud discharge opening of the mud guide pipe is arranged below the space division plate. The device can simplify the construction, separate sewage treatment and sludge treatment, lighten the influence of sludge on sewage treatment, and is favorable for stabilizing the water quality of sewage treatment and the controllability of the process. The prior art has the following problems that the existing sewage treatment mud-water separation technology has large occupied area, weak impact load resistance and easy occurrence of sludge expansion or membrane component blockage, and meanwhile, the mud-water separation device has poor operation stability due to excessive system mud yield and fluctuation of working conditions. Disclosure of Invention Therefore, the invention provides a suspension type mud-water separation device for sewage treatment, which is used for solving the problems that the existing sewage treatment mud-water separation technology in the prior art generally has large occupied area, weak impact load resistance and easy occurrence of sludge expansion or membrane component blockage, and meanwhile, the mud-water separation device is easy to have poor operation stability due to the fact that the system mud yield exceeds standard and the working condition fluctuates. In order to achieve the above object, the present invention provides a suspension type mud-water separation apparatus for sewage treatment, comprising: The device comprises an aerobic tank water inlet pipe, a sludge sinking separation z