High-purity barium hydroxide production wastewater recycling technology and equipment

Abstract

The invention relates to a high-purity barium hydroxide production wastewater recycling technology and equipment. The equipment is characterized in that an outlet of a barium hydroxide reactor is connected with a separator; the wastewater outlet of the separator is connected with a barium chloride reactor through a pipeline; a discharge pipe of the barium chloride reactor is connected with a filter; a liquid outlet pipe of the filter is connected with an alkaline liquor reactor; the discharge pipe of the alkaline liquor reactor is connected with a centrifugal machine; the centrifugal machine is provided with a finished product discharge pipe and a mother liquid discharge pipe; and the mother liquid discharge pipe is connected with the separator, wherein an acid inlet, a barium carbonate inlet, a barium carbonate inlet and a tap water inlet are also formed in the barium chloride reactor, an exhaust gas outlet is also formed in the top end of the barium chloride reactor and is connected with a wastewater outlet pipeline of the separator through an elbow. By utilizing the technology, barium ions in the wastewater can be fully recycled and are utilized to re-prepare high-purity barium hydroxide, so that resource recycling is realized, the environmental pollution is greatly reduced, resource consumption is reduced, the production cost is lowered, and the technology has a better economic benefit and a better environmental benefit.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment in the production of high-purity barium hydroxide, in particular to a recycling process and equipment for wastewater in the production of high-purity barium hydroxide. Background technique [0002] Barium hydroxide is an important variety of barium salt products. It is widely used in sewage purification. It is an effective remover for carbon dioxide and sulfate ions in the water treatment industry. It is also necessary in the pharmaceutical, plastic, glass, ceramic, and electronic industries. Chemicals, can be used to make organic barium compounds, barium-based grease, also used in refined animal and vegetable oils, sucrose, sugar beet, also used in plastic stabilizers, paper additives, sealing components, rubber vulcanization catalysts, antirust paper groups Coating dispersant, polyurethane foam fire extinguishing agent, silk and rayon treatment agent, boiler hard water softener and ...

AI Technical Summary

Problems solved by technology

[0008] Disadvantages of this method: high production cost, raw material utilization rate is only 70%, resource utilization rate is low, crystallization mother liquor contains barium chloride, barium hydroxide, sodium chloride, sodium hydroxide, difficult to recycle, usually directly discharged as waste water

[0012] ①The production cost is high, and the raw materials require good quality of witherite, but the current high-quality witherite mineral resources are becoming increasingly exhausted, while the utilization rate of process raw materials is only 50%, and the resource utilization rate is low;

[0013] ②The high-temperature reaction takes a long time and consumes a lot of energy. The high-temperature reaction at 1400°C takes dozens of hours to complete

[0014] ③The service life of the clip bowl containing the reaction materials is only 2-3 times, the cost is high, the waste water is directly discharged, and it is difficult to recover the barium in the waste water

The method is simple, the production is clean, the cost is low, the manganese dioxide is recycled, and the consumption is very small, but there is also no wastewater treatment link, and the wastewater in the filtration, concentration and other links is directly discharged, and the barium ions in it cannot be fully recovered.

[0018] The annual output of barium hydroxide in my country is about 30,000 tons, and the product share of high-purity barium hydroxide is increasing. A large amount of waste water is generated in the production of high-purity barium hydroxide, and the barium ions in it cannot be fully recycled, and most of them are directly discharged, which increases the environment. pollution, waste of resources

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