Method and device for granulation reaction by using high-hardness water

Abstract

The invention provides a method and device for a granulation reaction by using high-hardness water. According to the method, high-hardness raw water and a granulation reagent are sent to a quartz sand-containing vertical runner in a counter flow respectively; sand grains with the quartz sand as a carrier are obtained in the runner; and treated water is obtained at an outlet of the runner. According to the device, a high-hardness raw water inlet and a granulation reagent inlet are arranged at the bottom of a column reactor; an outlet is arranged at the top of the reactor; and the quartz sand is placed in the reactor. The method provided by the invention can greatly shorten a treatment time of the high-hardness water and recycle precipitate waste materials.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method and a device for granulation reaction using high-hardness water. Background technique [0002] Hardness, as an important water quality index, has received widespread attention in drinking water. Generally speaking, calcium ions and magnesium ions are the main causes of hardness. Water hardness originally refers to the ability of calcium and magnesium ions in water to precipitate soapy hydration liquid. The total hardness of water refers to the total concentration of calcium and magnesium ions in water, including carbonate hardness (that is, calcium and magnesium ions that can be precipitated in the form of carbonate by heating, so it is also called temporary hardness) and non-carbonate hardness (that is, the part of calcium and magnesium ions that cannot be precipitated after heating, also known as permanent hardness). [0003] Too high hardness wa...

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Problems solved by technology

In the industry, excessive water hardness in the textile industry will lead to uneven dyeing; high water hardness in the boiler is very dangerous, because the pipes in the boiler are locally overheated, which may easily cause deformation or damage of the pipes, and may even cause an explosion in severe cases.

[0004] For the removal of high hardness water, two methods are usually used. One is to add alkaline chemicals to precipitate calcium and magnesium ions in the water to achieve the purpose of removing hardness. However, the precipitation waste generated by this method must be removed in time. And it can not be effectively utilized, which increases useless manpower and material resource consumption; the other is to use ion exchange method to replace calcium and magnesium ions in the water with cation exchange resin to achieve the purpose of hardness removal, but this method has a large amount of acid and alkali consumption, Problems such as high operating costs, after passing through the ion exchanger, the mass concentration of the regeneration waste liquid is high, if it is discharged outside, it will not only cause a waste of resources, but also pollute the environment

[0005] At present, there is no research on the method of using high hardness water for granulation reaction at home and abroad. The use of high hardness water for granulation can not only reduce the hardness of water, but also reuse the sediment waste, saving energy and reducing emissions

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