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CN-121974436-A - Separation device and separation recovery process of fine powder carrier coated with biological film

CN121974436ACN 121974436 ACN121974436 ACN 121974436ACN-121974436-A

Abstract

The invention relates to the technical field of biochemical treatment reinforcement of sewage, in particular to a separation device and a separation and recovery process of a fine powder carrier covered with a biological film, wherein the separation device comprises a separation module and a product conveying unit from front to back according to a process flow, the separation module comprises at least one hydrocyclone, the hydrocyclone is provided with two outlets, two separated products with larger carrier content difference are respectively discharged, and the product conveying unit can respectively convey the separated products to other designated process units. According to the invention, through the arrangement, continuous, efficient and selective separation of the fine powder carrier and the carrier biological film from the sludge mixed liquid is realized, and carrier recovery and selective enrichment of carrier microorganisms are realized through rear-end conveying.

Inventors

  • MOU YUE
  • YAN CHENGSHU
  • CHEN HUIZHEN
  • PAN QING
  • LI XIAOYANG

Assignees

  • 湖南三友环保科技有限公司

Dates

Publication Date
20260505
Application Date
20260204

Claims (7)

  1. 1. A separating device of a fine powder carrier covered with a biological film, which is characterized by comprising a separating module (300) for separating products from a sludge mixed solution and a separated product conveying unit, wherein the separating module (300) comprises at least one hydrocyclone (400), and the hydrocyclone (400) is provided with two outlets for respectively discharging separated products with larger difference of the content of the two carriers; the separated product conveying unit comprises one or a combination of a conveying pipeline, a separated product regulating tank and a conveying pump, and is used for conveying the products to the designated process units respectively.
  2. 2. The separating device of a fine powder carrier covered with a biological film according to claim 1, further comprising a fine filter unit (100), wherein the fine filter unit (100) is used for pretreating the sludge mixed liquor to intercept and remove large particle impurities.
  3. 3. A separation device of fine powder carriers coated with a biofilm according to claim 2, characterized in that said fine filter unit (100) filters large particle impurities with a particle size of at least 1mm.
  4. 4. The separating device for fine powder carriers coated with biological film according to claim 1, further comprising a sludge inflow adjusting tank (200), wherein the sludge inflow adjusting tank (200) is connected with the water outlet of the fine filtering unit (100) for storing the filtered sludge mixed solution.
  5. 5. A device for separating fine powder carriers coated with a biofilm according to claim 1, characterized in that several of said hydrocyclones (400) are arranged in parallel.
  6. 6. The separation device of a fine powder carrier coated with a biological film according to claim 1, wherein the ratio of the carrier amount in the content product containing a large carrier amount to the carrier amount in the total treated sludge mixed liquor is not less than 75%.
  7. 7. A separation and recovery process of a fine powder carrier coated with a biological film, applied to the separation and recovery apparatus as set forth in any one of claims 1 to 6, comprising the steps of: S1, separating, namely carrying out hydrocyclone separation treatment on sludge mixed liquor containing a fine powder carrier coated with a biological film, so as to obtain a carrier-rich product with higher carrier content and a carrier-poor product with lower carrier content; s2, a product conveying step, namely conveying the two separated products to different designated process units respectively.

Description

Separation device and separation recovery process of fine powder carrier coated with biological film Technical Field The invention relates to the technical field of biochemical treatment reinforcement of sewage, in particular to a separation device and a separation and recovery process of a fine powder carrier coated with a biological film. Background The powder carrier biological fluidized bed technology (such as HPB technology) is an important development direction in the current sewage treatment field, and by adding the composite powder carrier into a biochemical tank, the concentration of mixed liquid in the biological tank is obviously improved, and a fluidized bed system for symbiotic of suspended growth and adhesion growth of double mud is constructed, so that the denitrification and dephosphorization efficiency is synchronously enhanced, and the standard-lifting capacity expansion of a sewage treatment plant under the condition of reducing newly-increased land is realized. The application bottleneck of the technology is how to efficiently and stably separate and recycle the powder carrier and the microorganism (namely the biological carrier) attached to the powder carrier from the residual sludge and recycle the powder carrier to a biochemical tank so as to maintain the number of the carriers of the system, the microorganism biomass and reduce the running cost. In the prior art, as the publication number is CN114751511A, the patent name is a sewage treatment system and a sewage treatment method based on vortex separation, the system entraps sludge particles by arranging a centrifugal separation device at the front end of a secondary sedimentation tank and is matched with a biological carrier hydrocyclone separation device for secondary separation, and the aim of reducing the load of the secondary sedimentation tank and recovering the carrier is achieved. However, such prior art techniques still suffer from significant drawbacks in achieving efficient, stable separation and recovery, mainly in: firstly, a single hydrocyclone is adopted for treatment, the treatment capacity is limited, and the treatment scale of the system is limited because of difficulty in coping with large-scale or fluctuating water inflow load; Secondly, the separation efficiency is greatly influenced by the concentration of the inlet water and the pressure fluctuation, the operation stability is insufficient, and the continuous and efficient carrier recovery rate is difficult to ensure. Thus, there is a need for a separation device for biofilm coated fine powder carriers that enables continuous, efficient separation of the product. Disclosure of Invention Technical problem to be solved Aiming at the defects existing in the prior art, the invention provides a separating device and a separating and recycling process of a fine powder carrier coated with a biological film, which can solve the problems of single separating and recycling function and low efficiency in the prior art. Technical proposal In order to achieve the above purpose, the invention is realized by the following technical scheme: The invention provides a separating device of a fine powder carrier covered with a biological film, which comprises a separating module and a separated product conveying unit, wherein the separating module is used for separating products from a sludge mixed liquid, the separating module comprises at least one hydrocyclone, the hydrocyclone is provided with two outlets, two separated products with large carrier content difference are respectively discharged, and the separated product conveying unit comprises one or more combinations of a conveying pipeline, a separated product regulating tank and a conveying pump and is used for conveying the products to a designated process unit respectively. Further, the device also comprises a precise filtering unit, wherein the precise filtering unit is used for preprocessing the sludge mixed liquid so as to intercept and remove large-particle impurities. Further, the fine filtration unit filters large particle impurities with a particle size of at least 1mm. Further, the device also comprises a mud inlet regulating tank, wherein the mud inlet regulating tank is connected with the water outlet of the precise filtering unit and is used for storing the filtered mud mixed solution. Further, a plurality of hydrocyclones are arranged in parallel. Further, the proportion of the carrier quantity in the product with a large carrier quantity in the total treated sludge mixed liquor is not less than 75%. The scheme also provides a separation and recovery process of the fine powder carrier covered with the biological film, which is applied to the separation and recovery device in the above steps and comprises the following steps: S1, separating, namely carrying out hydrocyclone separation treatment on sludge mixed liquor containing a fine powder carrier coated with a biological film, so as to obtain a carrier-rich