Treatment system and treatment process for wastewater containing fluorine and phosphorus

A technology of treatment system and treatment process, which is applied in the field of industrial wastewater treatment, can solve the problems of small amount of treated wastewater, large amount of sludge generated, and difficult discharge of wastewater up to standard, and achieve the effect of reducing operating costs and reducing the amount of sludge generated

Inactive Publication Date: 2020-06-19
四川恒泰环境技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sedimentation method can only realize the treatment of high-concentration wastewater, and the treated wastewater is difficult to discharge up to the standard, and the amount of sludge generated is large
In addition, flocculation sedimentation method, adsorption method, reverse osmosis and other methods have high treatment costs, small amount of treated wastewater, and it is difficult to achieve stable ultra-low discharge of fluoride in the treated wastewater

Method used

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  • Treatment system and treatment process for wastewater containing fluorine and phosphorus
  • Treatment system and treatment process for wastewater containing fluorine and phosphorus
  • Treatment system and treatment process for wastewater containing fluorine and phosphorus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Please refer to figure 1 , The treatment system of fluorine and phosphorus-containing wastewater according to the embodiment of the present invention includes: a pretreatment unit, a primary treatment unit, a secondary treatment unit, a discharge pond and a sludge reduction unit.

[0032] The pretreatment unit includes: a balance tank and a first pH adjustment tank connected in sequence.

[0033] The primary treatment unit includes: a primary defluorination reaction tank communicated with the outlet of the first pH adjustment tank, and a first flocculation sedimentation tank communicated with the outlet of the primary defluorination reaction tank. The outlet of the first flocculation sedimentation tank is respectively connected with the primary defluorination reaction tank, the secondary treatment unit and the sludge reduction unit. The outlet of the first flocculation-sedimentation tank includes: a first sludge outlet connected to the primary defluorination reaction t...

Embodiment 2

[0036] Please refer to figure 2 , the treatment system for fluorine and phosphorus-containing wastewater according to the embodiment of the present invention includes all the structures of embodiment 1, and also includes a tertiary treatment unit. The tertiary treatment unit includes: a second pH adjustment tank communicated with the second outlet of the second flocculation-settling tank, and a third flocculation-settling tank communicated with the outlet of the second pH adjustment tank. The outlet of the third flocculation sedimentation tank is connected with the discharge tank and the sludge reduction unit respectively. The outlet of the third flocculation-sedimentation tank includes: a third discharge outlet connected to the discharge tank and a third sludge discharge outlet connected to the sludge reduction unit. .

Embodiment 3

[0038] A treatment process for fluorine-containing phosphorus wastewater, characterized in that, the treatment system of Embodiment 1 is used to process, and it may further comprise the steps:

[0039] (1) The fluorine-containing phosphorus wastewater to be treated is passed into the pretreatment unit, and the wastewater is homogenized and evenly measured in the equalization tank and then entered into the first pH adjustment tank to adjust the pH of the wastewater to 6. Adjusted with 30wt% NaOH solution, the same is true for subsequent examples.

[0040] (2) The wastewater treated by the pretreatment unit is introduced into the primary treatment unit, and after being treated in the primary defluorination reaction tank, it enters the first flocculation sedimentation tank, and the dosage and The molar ratio of fluoride ions in the wastewater is calcium salt with a molar ratio of 8:1, and a mixed flocculant consisting of 50 mg / L PAC and 2 mg / L PAM is added to the first flocculati...

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Abstract

The invention discloses a treatment system and a treatment process for wastewater containing fluorine and phosphorus, and belongs to the technical field of industrial wastewater treatment. The treatment system comprises a pretreatment unit, a primary treatment unit, a secondary treatment unit, a discharge tank and a sludge reduction unit. According to the treatment system and the treatment processprovided by the invention, ultra-clean discharge of wastewater containing fluorine and phosphorus can be realized, and after the wastewater is subjected to deep fluorine and phosphorus removal treatment, at least the fluorine content in the wastewater can be reduced to 1.0 mg / L or below, the total phosphorus content in the wastewater can be reduced to 2.0 mg / L or below, and for some special areas, the total phosphorus content can be further reduced to 0.5 mg / L or below; the system and the process are suitable for purifying fluorine and phosphorus wastewater related to the fields of coal chemical industry, solar energy, semiconductors and the like, wherein the treatment process is simple, corresponding reaction units can be increased or decreased according to the actual situation of project emission standards, all reaction tanks are compactly arranged, the land is saved, and the operation and maintenance cost is low.

Description

technical field [0001] The invention relates to the technical field of industrial waste water treatment, in particular to a treatment system and process for waste water containing fluorine and phosphorus. Background technique [0002] As common industrial wastewater, fluorine and phosphorus wastewater involves coal chemical industry, solar energy, semiconductor and many other chemical and electronic fields, and the environmental pollution caused by its discharge is becoming more and more serious. In areas that lack centralized industrial wastewater treatment capacity, general sewage treatment plants, as the final recipient of industrial wastewater, lack advanced treatment technologies for fluorine- and phosphorus-containing wastewater. For key industries in key areas, especially parks and enterprises with industrial wastewater treatment capabilities, their pollutant discharge is subject to stricter control, and the implementation standards are stricter than conventional stan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/14C02F101/12
CPCC02F9/00C02F2101/14C02F2101/105C02F1/66C02F1/5245C02F1/56C02F2303/06
Inventor 唐彤向迎洪杨汉军黄文凤唐俊雷成张亚明章慧赵君科孙冬黄莉
Owner 四川恒泰环境技术有限责任公司
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