Steel plant high-salinity wastewater treatment agent and treatment method thereof

A high-salt wastewater treatment method technology, applied in metallurgical wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of easy introduction of calcium ions, inability to remove sodium ions and chloride ions at the same time, and high energy consumption and other problems to achieve the effect of speeding up the reaction rate, reducing the concentration of sodium ions and chloride ions, and reducing investment

Active Publication Date: 2021-01-01
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a treatment agent for high-salt wastewater in iron and steel plants and its treatment method to solve the problem that the existing high-salt wastewater treatment process in iron and steel plants consumes a lot of energy, easily introduces calcium ions, and cannot Technical Problems of Simultaneously Removing Sodium Ions and Chloride Ions in High Salt Wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 provides a high-salt wastewater treatment agent for iron and steel plants, including 60.8% of lead fluorosilicate, 28.3% of ammonium carbonate, 10.3% of ammonium bicarbonate and 0.6% of polyacrylic acid in weight percentage; the high-salt wastewater When preparing the treatment agent: firstly, after weighing the components according to the above formula content, the components are uniformly mixed to make particles with a particle size of 4-8mm, and the high-salt wastewater treatment agent described in Example 1 is obtained.

[0045] When utilizing the iron and steel plant high-salt wastewater treatment agent in the embodiment 1 to process the iron and steel plant high-salt wastewater, specifically:

[0046] Introduce 1000kg of high-salt wastewater from iron and steel plants into the reaction tank, and continuously feed CO-rich water into the reaction tank 2 The flue gas fully stirs the high-salt wastewater to be treated, and then disperses the high-salt wastew...

Embodiment 2

[0049] Example 2 provides a high-salt wastewater treatment agent for iron and steel plants, which, in weight percentages, includes 74.4% of lead fluorosilicate, 21.1% of ammonium carbonate and 4.5% of polyacrylic acid; during the preparation of the high-salt wastewater treatment agent: First, after weighing each component according to the above formula content, each component is uniformly mixed to prepare particles with a particle size of 4-8 mm, and the high-salt wastewater treatment agent for iron and steel plants described in Example 1 is obtained.

[0050] When utilizing the iron and steel plant high-salt wastewater treatment agent in the embodiment 2 to process the high-salt wastewater of the iron and steel plant, it is specifically:

[0051] Introduce 1000kg of high-salt wastewater from iron and steel plants into the reaction tank, and continuously feed CO-rich water into the reaction tank 2 The flue gas fully stirs the high-salt wastewater to be treated, and then disper...

Embodiment 3

[0054] Embodiment 3 provides a high-salt wastewater treatment agent, which in weight percentage includes 68.0% of lead fluorosilicate, 17.5% of ammonium carbonate, 8.3% of ammonium bicarbonate, 1.4% of polyacrylic acid and 4.8% of polyacrylamide; During the preparation of the high-salt wastewater treatment agent: firstly, after weighing each component according to the above-mentioned formula content, mix the components uniformly to prepare particles with a particle size of 4-8 mm, and obtain the high-salt wastewater described in Example 1. Salt wastewater treatment agent.

[0055] When utilizing the iron and steel plant high-salt wastewater treatment agent in the embodiment 3 to process the high-salt wastewater of the iron and steel plant, it is specifically:

[0056] Introduce 1000kg of high-salt wastewater from iron and steel plants into the reaction tank, and continuously feed CO-rich water into the reaction tank 2 The flue gas fully stirs the high-salt wastewater to be tr...

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Abstract

The invention discloses a steel plant high-salinity wastewater treatment agent and a treatment method thereof, the steel plant high-salinity wastewater treatment agent comprises, by weight, 60%-75% ofa precipitant, 20%-40% of an auxiliary agent, and 0.5%-6.5% of a dispersant; wherein the precipitant is lead silicofluoride, and the auxiliary agent is one or two of ammonium carbonate and ammonium bicarbonate; the dispersant is one or two of polyacrylic acid and polyacrylamide; according to the method, lead silicofluoride is used as the precipitator, and lead ions and carbonate ions in the leadsilicofluoride react to generate basic lead carbonate; ammonium carbonate or ammonium bicarbonate in the auxiliary agent provides a large amount of carbonate ions to promote combination of basic leadcarbonate and sodium ions in the high-salinity wastewater to generate basic lead carbonate sodium precipitate; the lead ions can react with chloride ions in the high-salinity wastewater to generate lead chloride precipitates, and the chloride ions in the wastewater are removed; by adding the dispersant, the affinity with water is effectively improved, so that the treating agent is easy to infiltrate and is kept in a dispersed state, the settling rate of sodium ions and chloride ions is effectively increased, and the effect of efficient purification is achieved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a high-salt wastewater treatment agent for iron and steel plants and a treatment method thereof. Background technique [0002] my country is a water-deficient country, and the per capita availability of fresh water resources is only one-third of the world average; and iron and steel plants are also large water consumers, and their circulating cooling systems are the largest industrial water consumption systems in iron and steel plants; Wastewater is the main source of sewage in steel plants, accounting for about 2 to 5% of the total circulating water. The wastewater discharged from the cooling circulation system is high-salt wastewater, which contains a large amount of chloride ions and sodium ions. The presence of chloride ions will not only cause serious corrosion to the water supply pipe network and water supply equipment and facilities, but also crysta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/58C02F9/04C02F103/16
CPCC02F1/5236C02F1/58C02F1/001C02F2103/16C02F2001/007
Inventor 邢相栋庞焯刚张馨艺郑建潞臧旭媛杜月利吕明李小明
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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