RU1787479C - Multi-body for boiling down solutions - Google Patents

Abstract

Usage: in the chemical, food, oil refining and other industries. SUMMARY OF THE INVENTION: The boiling zone is discharged into separators mounted outside the housings at the level of the upper tube sheets of the housings. The separators are connected to the annular spaces of the housings by drains, and the pipelines leading the product to be evaporated from the separators to subsequent housings have descending racks, lowered from the separators below their bottoms. In the ascending parts of the outlet pipelines, bubblers are installed connected to the heating steam supply pipelines, 1 sludge. ate

Description

The invention relates to thickening a solution in multi-shell film evaporators and can be used in the chemical and food industries.

Multi-case evaporators are known, consisting of evaporators with a remote boiling zone.

The disadvantage of such installations is the relatively long residence time of the product in the heat-affected zone and the use of pumps to organize its circulation inside each housing and transfer from the housing to the housing. This impairs the quality of the product, reduces the intensity and increases the energy intensity of the thickening process.

Closest to the invention is a CIFAL type multi-shell film evaporator, consisting of three shell-and-tube evaporators, a heater, separators and pumps for transferring the evaporated medium from the housing to the housing.

The disadvantages of this installation are: intensive accumulation in boiling pipes and the use of pumps for pumping the evaporated medium from the housing to the housing, which reduces the speed, efficiency of evaporation and is associated with additional operational and energy costs.

The purpose of the invention is to intensify the thickening process, reduce operating and energy costs and achieve sterility of the evaporated product by reducing scale formation and eliminating transfer pumps.

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This goal is achieved by the fact that in a multi-case installation for thickening a solution, consisting of several film evaporators, each of which is equipped with a solution distributor, a heating chamber with vertical boiling pipes fixed in the upper and lower tube sheets, a separator connected to the tube chamber apparatus, connecting pipelines and pipelines for supplying heating steam, removal of the evaporated solution from the separator of the previous apparatus into the annulus of the subsequent app The gates, separators are installed at the top of the pipe grids and are connected to the lower pipe chamber by means of a vertical pipe, and the pipelines of the discharge pipe of the separator are arranged vertically and are made U-shaped, while the lower part of the U-shaped pipe is located below the separator bottom and is vertical a part of this pipeline connected to the annular space of the subsequent apparatus is provided with a bubbler connected to the heating steam supply pipeline.

The drawing schematically shows the proposed installation, where1 is the nozzle for supplying the solution to the first housing; 2 - solution dispenser; 3 - upper tube sheet; 4- bale of pipes; 5-pipe-tube for supplying heating steam to the annulus of the first housing 6; 7 - lower tube sheet; 8 - annular camera apparatus; 9 - a pipeline connecting the annular chamber 8 and the separator 10; 11 - pipeline for the removal of secondary steam from the separator 10 into the heating chamber of the next housing; 12 - descending one hundred to the U-shaped pipe, draining the solution from

 a separator 10 in the next housing; thirteen - ; ascending one hundred k-shaped pipeline.; Yes; 14- 6ap66tep; rf5 - pipeline for supplying heating steam to the bubbler Mb - valve.

The installation works as follows .. .. .... .

The thickening solution enters through the nozzle 1 to the solution distributor 2 of the first case and flows off with a thin film in the boiling tubes 4, fixed in the tube grilles 3 and 7. The steam pipe 5 feeds heating steam into the annulus 6. The solution accumulates in the tube cavity 8 and through the pipe 9 enters the separator 10. Secondary steam generated in

pipe 4, creates a pressure compensated by the hydrostatic pressure of the solution column in the pipe 9 and the separator 10. The level of the solution in the housing is maintained at the height of the lower tube sheet 7. In the separator 10, the pressure is lower than in the pipes 4 and the superheated solution boils. The resulting secondary steam through the steam line 11 enters the annulus

of the next casing to heat it, and the thickening solution fills the U-shaped piping, up to 13 of which through the bubbler 14 through the pipe 15 serves heating steam. The valve 16 is regulated

its amount so that a lifting effect is created in the pipe 13. In this case, the thickened solution is transported from the separator 10 to the annulus of the next body to its distributor

solution. All subsequent installation casings work similarly, with the only difference being that they are heated by a secondary

previous ferry hull.

Claims (1)

The claims A multi-shell solution thickening system consisting of several film evaporators, each of which is equipped with a solution distributor, a heating chamber with vertical boiling pipes fixed in the upper and lower tube sheets, a separator connected to the tube chamber of the device, connecting heating steam supply pipelines , the removal of the evaporated solution from the separator of the previous apparatus into the annular space of the subsequent apparatus, about t-, having the fact that, in order to intensify thickening process, lowering operating energy costs and achieving sterility of the evaporated product by reducing scale formation and eliminating pumping pumps, separators are installed at the level of the upper tube sheets and connected to the bottom annular chamber by means of a vertical pipe, and the piping of the product outlet from the separator is arranged vertically and is made U-shaped, while the lower part of the U-shaped pipe is located below the bottom of the separator, and the vertical part of this pipe, connected to the annular space of the blower, is equipped with a bubbler connected to the heating steam supply pipe.