A circulating evaporator with partitions

Abstract

The invention belongs to the technical field of evaporators, and discloses a circulation evaporator with a separation plate. The evaporator comprises a heating chamber and an evaporation chamber, wherein the heating chamber comprises an ascending bed and a descending bed; the separation plate is arranged in the evaporation chamber; a mixed work medium prepared from solid particles and liquid phasework medium of pure water is added into the heating chamber and the evaporation chamber for forced circulation; a solid particle distribution plate is arranged at the upper part of the separation plate; the solid particle distribution plate comprises a side plate fixedly connected to the separation plate and a main plate vertically connected onto the top of the side plate; the main plate is in horizontal arrangement and is positioned above the descending bed; the main plate is provided with a plurality of rows of round holes which gradually become bigger from inside to outside and are used assolid particle passage openings. The circulation evaporator has the advantages that the structure is simple; the processing is convenient; the online scale prevention, scale removal and reinforced heat transfer can be realized; the particle distribution device can effectively improve the particle distribution condition of the descending bed; the solid particles can be uniformly distributed into atube bundle of the descending bed; the reinforced heat transfer, scale prevention and scale removal effects can be further and favorably improved.

Description

technical field [0001] The invention belongs to the technical field of evaporators, in particular, it is a heat transfer enhancement and anti-scaling and descaling technology applied to a vertical double-tube-pass circulation type evaporator with partitions. Background technique [0002] The vertical double-pipe-pass circulating evaporator with partitions is widely used in industrial production such as soda sulfide. With the prolongation of the operation time, the suspended matter or crystallized matter in the material is enriched on the wall of the tube bundle, forming fouling. The generation of dirt will reduce the heat transfer coefficient and heat transfer rate in the heat exchange tube, and the heat exchange equipment needs to be shut down for cleaning regularly, resulting in a serious decline in production capacity. At present, the anti-scaling and descaling methods used in this type of evaporator mainly include physical methods and chemical methods, such as: using hi...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems of heat transfer performance decline and wall fouling of the vertical double-tube-pass circulating evaporator with partitions in long-term use. It provides a circulating evaporator with partitions, which will The bed heat exchange anti-scaling and energy-saving technology is applied to the vertical double-tube-pass circulating evaporator, and at the same time, the particle distribution on the side of the upper bed in the fluidized bed evaporator is relatively uniform, while the particle distribution on the descending bed is uneven. The problem is to improve the uniformity of particle distribution by setting a solid particle distribution plate, so as to achieve good online enhanced heat transfer and anti-scaling effects.

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