CN-224226782-U - Precipitation dephosphorization integration equipment

Abstract

The utility model relates to a precipitation and dephosphorization integrated device, which comprises a central cylinder, a precipitation zone arranged around the central cylinder and an annular dephosphorization zone arranged around the precipitation zone, wherein the annular dephosphorization zone is divided into a plurality of dephosphorization sections, and each dephosphorization section comprises an upstream dephosphorization reaction zone, an upstream dephosphorization precipitation zone, a downstream dephosphorization reaction zone, a downstream dephosphorization precipitation zone and a dephosphorization water outlet weir which are sequentially arranged from upstream to downstream and are in fluid communication. The integrated precipitation and dephosphorization equipment of the utility model allows the optimal chemical agent and the dosage thereof of each dephosphorization section to be flexibly determined according to the phosphate type and the content in water, thereby realizing the effects of improving the dephosphorization effect and reducing the dosage and the cost of the chemical agent.

Inventors

• YU NAN
• HAO HAIFENG
• HAO RUJIE

Assignees

• 金锣水务有限公司

Dates

Publication Date

20260512

Application Date

20250509

Claims (10)

1. 1. The integrated precipitation and dephosphorization equipment is characterized by comprising a central cylinder, a precipitation zone arranged around the central cylinder and an annular dephosphorization zone arranged around the precipitation zone, wherein the annular dephosphorization zone is divided into N dephosphorization sections, N is an integer greater than or equal to 1, the central cylinder is used for guiding mixed liquid to be precipitated into the precipitation zone from the central cylinder, the precipitation zone is used for carrying out solid-liquid separation on the mixed liquid to be precipitated and guiding the obtained supernatant liquid into at least one dephosphorization section as dephosphorization inlet water, and the dephosphorization section comprises an upstream dephosphorization reaction zone, an upstream dephosphorization precipitation zone, a downstream dephosphorization reaction zone, a downstream dephosphorization precipitation zone and a dephosphorization effluent weir which are sequentially arranged from upstream to downstream and are in fluid communication.
2. 2. The integrated precipitation and dephosphorization apparatus according to claim 1, wherein two or more dividing walls are provided in said annular dephosphorization zone to divide said annular dephosphorization zone into two or more dephosphorization sections.
3. 3. The integrated precipitation and dephosphorization device according to claim 1, wherein a precipitation water outlet weir is arranged on the inner side wall of the upper part of the precipitation zone for introducing the supernatant fluid of the precipitation zone into the upstream dephosphorization reaction zone of at least one dephosphorization section as dephosphorization inlet water.
4. 4. The integrated precipitation and dephosphorization apparatus according to claim 1, wherein the upstream and downstream dephosphorization reaction zones are provided with a first and a second dosing device, respectively.
5. 5. The integrated precipitation and dephosphorization apparatus according to claim 1, wherein a first deflector is arranged between the upstream dephosphorization reaction zone and the upstream dephosphorization precipitation zone, and/or a second deflector is arranged between the downstream dephosphorization reaction zone and the downstream dephosphorization precipitation zone.
6. 6. The integrated precipitation and dephosphorization apparatus according to any one of claims 1 to 5, wherein the central cylinder, the precipitation zone, the upstream dephosphorization reaction zone, the upstream dephosphorization precipitation zone, the downstream dephosphorization reaction zone, the downstream dephosphorization precipitation zone and the dephosphorization effluent weir are arranged such that the respective liquid levels are sequentially lowered.
7. 7. The integrated precipitation and dephosphorization apparatus according to any one of claims 1 to 5, characterized in that said central cylinder, precipitation zone and annular dephosphorization zone are arranged in the form of concentric rings of central symmetry.
8. 8. The integrated precipitation and dephosphorization apparatus according to any one of claims 1 to 5, wherein each of said precipitation zone, upstream dephosphorization reaction zone, upstream dephosphorization precipitation zone, downstream dephosphorization reaction zone, downstream dephosphorization precipitation zone is independently provided with a sludge discharge means at the bottom of each.
9. 9. The integrated precipitation and dephosphorization apparatus according to claim 8, wherein said sludge discharge means is a suction device, a sludge discharge channel, a sludge discharge pipe, and a device for brushing or scraping sludge at the bottom of the tank, or any combination thereof.
10. 10. The integrated precipitation and dephosphorization apparatus according to claim 9, wherein said suction means is further connected to an air supply line to allow air-blowing backwash of said precipitation zone or annular dephosphorization zone.

Description

Precipitation dephosphorization integration equipment Technical Field The utility model relates to the field of sewage treatment, in particular to a precipitation and dephosphorization integrated device. Background The 'dephosphorization' in sewage treatment is mainly chemical dephosphorization, wherein the 'dephosphorization' is carried out by adding chemical agent (such as aluminum salt, ferric salt, lime, etc.) to react with phosphate in sewage to generate insoluble precipitate, and then removing the insoluble precipitate by precipitation or filtration. The chemical dephosphorization has the advantages of simple operation, good dephosphorization effect, stable treatment efficiency of 80% -90%, no secondary pollution caused by re-phosphorus discharge, good dephosphorization effect when the concentration of the inflow water is high, high dosage, high treatment cost and large amount of chemical sludge. Accordingly, there remains a need to develop precipitation dephosphorization equipment and processes for wastewater treatment in order to further address the above-mentioned problems. Disclosure of utility model It is an object of the present utility model to provide an integrated precipitation and dephosphorization apparatus to solve the aforementioned problems of the prior art. Specifically, the present utility model provides the following technical solutions. An aspect of the present utility model provides a precipitation and dephosphorization integrated apparatus comprising a central barrel, a precipitation zone disposed around the central barrel, and an annular dephosphorization zone disposed around the precipitation zone, wherein the annular dephosphorization zone is divided into N dephosphorization sections, N being an integer greater than or equal to 1, wherein the central barrel is configured to direct a mixed liquor to be precipitated from the central barrel into the precipitation zone, the precipitation zone is configured to perform solid-liquid separation on the mixed liquor to be precipitated and to direct the obtained supernatant as dephosphorization influent into at least one of the dephosphorization sections, the dephosphorization section comprises an upstream dephosphorization reaction zone, an upstream dephosphorization precipitation zone, a downstream dephosphorization reaction zone, a downstream dephosphorization precipitation zone, and a dephosphorization effluent weir which are disposed in order from upstream to downstream and are in fluid communication. Further, providing two or more partition walls in the annular phosphorus removal zone divides the annular phosphorus removal zone into two or more phosphorus removal sections. Further, a sedimentation water outlet weir is arranged on the inner side wall of the upper part of the sedimentation zone and is used for guiding supernatant fluid of the sedimentation zone into an upstream dephosphorization reaction zone of at least one dephosphorization section as dephosphorization inlet water. Further, the upstream dephosphorization reaction zone and the downstream dephosphorization reaction zone are respectively provided with a first dosing device and a second dosing device. Further, a first guide plate is arranged between the upstream dephosphorization reaction zone and the upstream dephosphorization sedimentation zone, and/or a second guide plate is arranged between the downstream dephosphorization reaction zone and the downstream dephosphorization sedimentation zone. Further, the central cylinder, the sedimentation zone, the upstream dephosphorization reaction zone, the upstream dephosphorization sedimentation zone, the downstream dephosphorization reaction zone, the downstream dephosphorization sedimentation zone and the dephosphorization water outlet weir are arranged so that the respective liquid level heights are sequentially reduced. Further, the central cylinder, the sedimentation zone and the annular dephosphorization zone are arranged in the form of concentric rings which are centrosymmetric. Further, the sedimentation zone, the upstream dephosphorization reaction zone, the upstream dephosphorization sedimentation zone, the downstream dephosphorization reaction zone and the downstream dephosphorization sedimentation zone are respectively and independently provided with a sludge discharge device at the bottom of each. Further, the sludge discharge device is a sludge suction device, a sludge discharge ditch, a sludge discharge pipe, a device capable of brushing or scraping sludge at the bottom of the tank, or any combination thereof. Further, the suction device is also connected with an air supply pipe to allow the sedimentation zone or the annular dephosphorization zone to be subjected to air-blowing backwashing. The integrated precipitation and dephosphorization equipment disclosed by the utility model compactly integrates the precipitation area and the dephosphorization area into a whole in concentric annular arrangement, so that th