A device for centrifugally recovering brine after concentration and crystallization

Abstract

The invention discloses a device for concentrating, crystallizing and centrifugally recycling saline water. The device comprises a concentrating heat exchange tank and a crystallizing tank, wherein the concentrating heat exchange tank is of a jacket type long cylinder structure consisting of both an inner cylinder and an outer cylinder and is transversely arranged; a rotary shaft transversely penetrates through the interior of the inner cylinder; a fiber brush beam is fixed on the rotary shaft; the inner cylinder is connected with a cyclone separator through an air pipe and an exhaust fan, and then the cyclone separator is connected with the inner cylinder to form an evaporation loop; a jacket, a water return pipe, a waste heat pool heat exchange bundled pipe of a boiler, a circulation water pump and a water inlet pipe form a heating circulation loop; the jacket is connected with a water hammer vibrator consisting of a crank connecting rod and a piston; the left end of the inner cylinder is higher than the right end of the inner cylinder; an inlet pipe of a solution to be concentrated is arranged at the left end of the inner cylinder, and the right end of the inner cylinder is connected with the crystallizing tank through a flow groove; the cone bottom of the crystallizing tank is connected with a spiral centrifugal separator and the inner cylinder through a mortar pump; the centrifugal separator is provided with a temporary centrifugal liquid storage groove and a crystal groove. The device for concentrating, crystallizing and centrifugally recycling the saline water, provided by the invention, is unique and ingenious in concept, high in practicality, perfect in functionality and wide in application prospect.

Description

technical field [0001] The invention relates to a device for centrifugally recovering brine after concentration and crystallization. Background technique [0002] Sodium chloride is widely used in food, chemical industry, biology, medicine and other fields. These fields will produce thousands of tons of waste brine every day. If it is directly discharged, it will not only waste resources, but more importantly, because sodium chloride is harmful to natural microorganisms The inhibitory effect produced will have serious negative effects on the ecological environment. Scientific research has confirmed that: when the concentration of sodium chloride in the water reaches 1%, it will inhibit the growth and reproduction of most microorganisms; and when the concentration of sodium chloride in the water reaches 4%, most of the degraded COD and BOD Microorganisms cannot survive. [0003] Therefore, the recovery of sodium chloride in waste brine not only has important economic signif...

AI Technical Summary

Problems solved by technology

Since the solubility of sodium chloride is little affected by temperature, 39.8 grams of sodium chloride can be dissolved per 100 grams of water at 100°C, and 35.7 grams can be dissolved at 0°C. Therefore, generally, it can only be carried out by concentrated crystallization. Recycling, but the existing technology lacks a complete set of equipment that concentrates and crystallizes brine and then centrifugally recovers it. The breakthrough of the complete set of equipment needs to overcome the small effective heat exchange area and low efficiency of the inner wall of the concentrated heat exchange tank, and it is difficult to separate and remove the crystallization on the inner wall of the concentrated heat exchange tank. , the crystallization tank is easy to block and many other technical bottlenecks

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