Water purification agent for efficiently removing calcium and magnesium ions in wastewater and use method

Abstract

The invention relates to the technical field of wastewater treatment, and particularly discloses a water purification agent for efficiently removing calcium and magnesium ions in wastewater and a use method, the water purification agent is used for wastewater treatment, and the pH value of the wastewater is 8.5-9.5; the water purification agent is composed of a water purifying agent and an auxiliary agent, the water purifying agent and the auxiliary agent are cooperatively used, and the weight usage amount of the auxiliary agent is 0.1-0.5% of that of the water purifying agent; the water purifying agent is prepared from the following raw materials in percentage by weight: 50-70% of sodium phosphate, 20-40% of sodium carbonate and 5-10% of polyaluminum chloride. The auxiliary agent is an anionic polyacrylamide aqueous solution. Through the synergistic effect of the raw materials, the water purification agent has the advantages of high removal rate, low cost, simplicity and convenience in use and stability in use.

Description

technical field [0001] The present application relates to the technical field of wastewater treatment, more specifically, it relates to a water purification agent for efficiently removing calcium and magnesium ions in wastewater and a use method thereof. Background technique [0002] In industrial production, a large amount of wastewater is often produced, and the wastewater contains high calcium and magnesium ions, especially in the barite mineral powder purification and whitening process, the concentration of calcium ions in wastewater is as high as 500PPM, and the concentration of magnesium ions is as high as 300PPM. During the discharge process of these waste waters, it will affect the difficulty of its treatment, and there will be fouling of the pipes during the long-distance transportation process. In severe cases, it will cause blockage of the pipes, and even cause waste water pollution accidents, which have a great impact on the environment. [0003] In related techn...

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Problems solved by technology

During the discharge process of these waste water, it will affect the difficulty of its treatment, and there will be scaling in the pipeline during the long-distance transportation process, which will cause blockage of the pipeline in severe cases, and even cause waste water pollution accidents, which have a greater impact on the environment

[0003] In related technologies, for the removal of calcium and magnesium ions in wastewater, there are defects such as unstable removal effect, high cost, and complicated operation. Some manufacturers also use ion exchange method, although ion exchange method can remove calcium and magnesium ions in wastewater , and reduce the concentration of calcium and magnesium ions to less than 1PPM, but the ion exchange method is more suitable for the removal of low-concentration calcium and magnesium ions. If the concentration of calcium and magnesium ions in wastewater is high, a large amount of exchange resin is required, and the operation difficulty increases. but also increased maintenance costs

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