A device that concentrates and crystallizes brine and then recovers it by centrifugation

Abstract

The invention discloses a device for centrifugal recovery of saline water after concentration and crystallization. The device comprises a concentrating heat exchange tank and a crystalizing tank, wherein the concentrating heat exchange tank is of a jacket long cylindrical structure composed of an inner cylinder and an outer cylinder, and is arranged longitudinally; a rotating shaft longitudinally penetrates through the inner cylinder; a fiber brush bundle is fixed on the brush hair drum of the rotating shaft; the inner cylinder is connected with a cyclone separator via an air pipe and an exhaust fan and then is connected back to the inner cylinder to form an evaporation loop; a jacket is connected with a water return pipe, the heat exchange tube array of the waste heat water tank of a boiler, a circulating water pump and a water inlet pipe to form a heating circulation loop; the jacket is connected with a water hammer vibrator composed of a crank connecting rod and a piston; a to-be-concentrated solution inlet pipe is arranged above the inner cylinder, and the crystalizing tank is connected under the inner cylinder by use of an inclined bottom groove and a runner; the tapered bottom of the crystalizing tank is connected with a screw centrifugal separator and the inner cylinder by use of a mortar pump; the centrifugal separator is provided with a centrifugate temporary storage tank and a crystal tank. The device is unique and ingenious in design, high in practicability; the device for concentrating and crystalizing the saline water for centrifugal recovery is complete in functions 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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