Falling-film tube

Abstract

The invention relates to a falling-film tube. The adopted technical scheme is as follows: the lower end of a centre nickel tube is coated by a lower end body; a center nickel tube support is arranged between the centre nickel tube and the lower end body; the lower end body is connected with a bow-shaped support; the lower end body is provided with a lower liftinglug and a fused salt outlet tube; the outside of the middle section of the centre nickel tube is coated by a clamping sleeve tube I, a clamping sleeve tube II and a compensator; both ends of the clamping sleeve tube I are respectively connected with the lower end body and the clamping sleeve tube II; the other end of the clamping sleeve tube II is connected with the compensator; the clamping sleeve tube I is provided with an insulator holder, an upper liftinglug and a fused salt inlet tube; the outside of an upper section of the centre nickel tube is coated by an upper end body; the upper end body is connected with a flange cover, an erosion protection blocking tube is arranged between the upper end body and the centre nickel tube, and the upper end body is provided with a lye inlet tube; the upper end of a distribution device is connected with the upper head face of the centre nickel tube; a steam tube coil passes through the insulation holder and is coiled at the outside of the clamping sleeve tube I, the clamping sleeve tube II and the lower end body. The invention realizes localization of molten alkali devices and has low cost, and liquid lye with the temperature of 164.9 DEG C is heated by the device to become the molten alkali with the temperature of 411.9 DEG C.

Description

technical field [0001] The invention relates to a highly concentrated lye evaporation device. After passing through the device, the lye is heated from 164.9°C liquid alkali to 411.9°C to generate 99% molten alkali. Background technique [0002] With the increasing demand for high-concentration alkali and solid alkali in the caustic soda market, many alkali factories have increased their investment in the production of high-concentration alkali and solid alkali; this greatly increases the demand for falling film pipes. At present, all chlor-alkali manufacturers use imported falling film tubes, which not only have high cost, long delivery cycle, but also difficult maintenance. In addition, during production, the lye is heated unevenly, which easily forms a heating dead zone; the central nickel tube is prone to bending and swinging during use. Material selection has always been a difficult problem surrounding various chlor-alkali manufacturers. Contents of the invention [...

AI Technical Summary

Problems solved by technology

At present, all chlor-alkali manufacturers use imported falling film tubes, which not only have high cost, long delivery cycle, but also difficult maintenance

In addition, during production, the lye is heated unevenly, which easily forms a heating dead zone; the central nickel tube is prone to bending and swinging during use

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