Strong-effect concentration mechanism in solid caustic soda production device

Abstract

The invention discloses a strong-effect concentration mechanism in a solid caustic soda production device. The strong-effect concentration mechanism comprises an evaporator, a flash tank, a distribution tank, a strong-effect first alkaline liquid delivery pipe arranged between the evaporator and the flash tank, and a strong-effect second alkaline liquid delivery pipe arranged between the flash tank and the distribution tank, wherein the bottom of the distribution tank is provided with a distribution tank discharging pipe, high-temperature fused salt is pumped into a fused salt pipeline systemby virtue of a fused salt pump, the fused salt pipeline system comprises a fused salt input pipe, fused salt heat tracing pipes and fused salt heating jackets, the fused salt in each fused salt heat tracing pipe and each fused salt heating jacket is supplied by the fused salt input pipe, the fused salt in each fused salt heat tracing pipe and each fused salt heating jacket flows from the bottom tothe top, an evaporation fused salt delivery pipe connected to the fused salt input pipe is communicated to a heating medium inlet of the evaporator, all fused salt is collected into a fused salt output pipe, and the fused salt output pipe is communicated with a fused salt storage groove. By adopting the strong-effect concentration mechanism, the failure that the alkaline liquid is solidified to block the pipeline can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of solid alkali production equipment, in particular to a high-efficiency concentration mechanism. Background technique [0002] Solid alkali production equipment usually includes: three-effect concentration mechanism, two-effect concentration mechanism, and concentrated-effect concentration mechanism. In the production process of solid alkali, the lye passes through the three-effect concentration mechanism, the second-effect concentration mechanism, and the concentrated-effect concentration mechanism in turn to produce high-concentration solid alkali. The high-efficiency concentration mechanism mainly includes: evaporator, flash tank, and distribution tank. The bottom of the evaporator is provided with a discharge pipe, and the distribution tank is provided with an overflow pipe. Both the discharge pipe and the overflow pipe are connected to the lye dilution The high-temperature molten salt produced by the ...

AI Technical Summary

Problems solved by technology

At present, the high-efficiency concentration mechanism has the following defects: 1. The molten salt pumped by the molten salt pump flows from top to bottom in the molten salt pipeline system, which makes the distribution of molten salt uneven in each molten salt pipeline, and at the same time The molten salt in some pipelines, especially the vertical pipelines, will produce a "blind area" that does not contact the pipe wall of the pipeline that transports the lye. Accidents occur frequently, which brings great inconvenience to the production of solid alkali, greatly increases the amount of maintenance, and increases the loss of materials and energy, thereby increasing the production cost of solid alkali

2. Since the position of the lye dilution tank is the lowest, it is impossible to use molten salt heat tracing outside the drain pipe and overflow pipe, but only electric heat tracing. However, once the electric heat tracing device outside the lye pipe is damaged, it is very difficult to maintain trouble

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