High-efficiency compound phosphorus removal agent and preparation method thereof

A compound dephosphorization agent, high-efficiency technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of increasing labor costs and reagent costs, consuming manpower and chemicals, and high operating costs , to achieve the effect of less chemical dosage, low treatment cost and obvious phosphorus removal effect

Active Publication Date: 2018-04-20
广东桑海环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are some methods for phosphorus removal, such as the use of aluminum salt or calcium salt and phosphate ions in wastewater to form insoluble phosphate to remove, but the price of aluminum salt is high, and the operating cost is high, which is not suitable for large-scale and high-efficiency. Phosphorus removal, and calcium salt needs to be at a higher Ph to form a more stable precipitation and achieve a higher phosphorus removal efficiency. During the treatment process, the Ph value of the sewage needs to be adjusted to be alkaline, and the Ph value needs to be adjusted before discharge. Adjusting to neutral, this operation process needs to consume a certain amount of manpower and chemicals, which greatly increases the cost of labor and reagents

Method used

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  • High-efficiency compound phosphorus removal agent and preparation method thereof
  • High-efficiency compound phosphorus removal agent and preparation method thereof
  • High-efficiency compound phosphorus removal agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-efficiency composite phosphorus removal agent consists of the following components in parts by mass:

[0028]

[0029] A preparation method of high-efficiency composite phosphorus removal agent, comprising the following steps:

[0030] 1) Put ferrous chloride into the reaction kettle, add hydrochloric acid and hydrogen peroxide in sequence, heat to 85°C and stir for 2 hours;

[0031] 2) Add natural mineral powder, stir evenly, add silicon dioxide, heat to 85°C and stir for 1 hour;

[0032] 3) Continue to add sodium nitrite and react at 85°C for 4 hours to obtain a high-efficiency composite phosphorus removal agent.

Embodiment 2

[0034] A high-efficiency composite phosphorus removal agent consists of the following components in parts by mass:

[0035]

[0036] A preparation method of high-efficiency composite phosphorus removal agent, comprising the following steps:

[0037] 1) Put ferrous chloride in the reaction kettle, add hydrochloric acid and hydrogen peroxide in sequence, heat to 85°C and stir for 1.5 hours;

[0038] 2) Then add natural mineral powder, stir evenly, add silicon dioxide, heat to 85°C and stir for 2 hours;

[0039] 3) Continue to add sodium nitrite and react at 90°C for 5 hours to obtain a high-efficiency composite phosphorus removal agent;

[0040] 4) Drying and dehydrating the high-efficiency composite phosphorus removal agent in step 3) at 80° C. to make a solid high-efficiency composite phosphorus removal agent.

Embodiment 3

[0042] A high-efficiency composite phosphorus removal agent consists of the following components in parts by mass:

[0043]

[0044] A preparation method of high-efficiency composite phosphorus removal agent, comprising the following steps:

[0045] 1) Put ferrous chloride in the reaction kettle, add hydrochloric acid and hydrogen peroxide in sequence, heat to 90°C and stir for 2 hours;

[0046] 2) Then add natural mineral powder, stir evenly, add silicon dioxide, heat to 90°C and stir for 2 hours;

[0047] 3) Continue to add sodium nitrite and react at 100°C for 5 hours to obtain a high-efficiency composite phosphorus removal agent;

[0048] 4) Drying and dehydrating the high-efficiency composite phosphorus removal agent in step 3) at 100° C. to make a solid high-efficiency composite phosphorus removal agent.

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Abstract

The invention discloses a high-efficiency compound phosphorus removal agent which consists of the following components in parts by mass: 80-100 parts of ferrous chloride, 20-50 parts of an antioxidant, 1-20 parts of a natural mineral powder, 10-20 parts of silica, 20-40 parts of a catalyst and 10-15 parts of a stabilizer. The high-efficiency compound phosphorus removal agent has obvious effect ofphosphorus removal, has the removal rate reaching 92% or more, has less drug dosage and relatively low treatment cost, has relatively strong purified water quality, has the ability to remove BOD, CODand heavy metal ions in water, and also has efficacies of decolorization, sulfur removal, oil removal, sludge dewatering and the like; a preparation process of the high-efficiency compound phosphorusremoval agent is simple; the price of the used ferrous chloride is low, byproducts of upstream industries can be used, and reduction of the cost of the compound phosphorus removal agent is facilitated.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a high-efficiency composite dephosphorization agent for removing phosphate ions in wastewater and a preparation method thereof. Background technique [0002] Phosphorus is one of the main elements needed for biological growth. In surface freshwater systems, phosphate is usually the limiting factor for plant growth. In normal freshwater systems, phosphorus content is usually limited. Once the phosphorus content exceeds a certain amount, the increased Phosphate will lead to excessive growth of plants, resulting in eutrophication of water bodies, rapid reproduction of algae and other plankton, a decrease in dissolved oxygen in water bodies, deterioration of water quality, and massive death of fish and other organisms, resulting in ecological imbalance. Industry, aquaculture and tourism have all come to great harm. [0003] In the actual industrial sewage an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/52C02F1/28C02F9/04C02F101/10
CPCC02F1/00C02F1/001C02F1/281C02F1/52C02F1/5236C02F9/00C02F2001/007C02F2101/105
Inventor 程应春
Owner 广东桑海环保有限公司
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