SU912184A1 - Evaporation apparatus - Google Patents

Description

(5) STEAM DEVICE

I

The invention relates to evaporators of chemical, food and other industries, in particular to apparatus for concentrating solutions by direct contact with a gaseous coolant.

A evaporation apparatus for concentrating solutions is known by direct contact with a gaseous coolant, which comprises a vertical housing with a lid and supply pipes for supplying the initial solution, removal of the evaporated solution and a vapor-gas mixture, a bubbling pipe fixed in the lid, and a circulating pipe located outside of the bubbling gas. The device is also provided with a horizontal partition with gas outlet pipes installed in the annular space between the circulation pipe and the body tij

Its disadvantage lies in the fact that the apparatus can work only in one-pass mode, without ensuring the natural circulation of the solution. In order to create multiple forced circulation, additional equipment and energy costs for pumping the solution are necessary. In addition, in the process of operation, the gas outlet pipes stick or stick to salt crystals, which causes the apparatus to stop for washing and cleaning.

Also known evaporation apparatus containing a vertical body with

15 with a lid and nozzles for supplying the initial solution, removal of the evaporated solution and the vapor-gas mixture, bubbling pipes fixed in the lid, and the circulation pipe, located 30 outside of the bubbling pipes, in which a repeated evaporation of the evaporated solution 2 is provided.

However, in the contact zone, the direct flow of the gaseous coolant and the solution is established, which does not allow for a high intensity of heat exchange, since the temperature pressure between the contacting media during flow is minimal.

The aim of the invention is to intensify the heat exchange between the coolant gas and the solution.

The goal is achieved by the fact that in a vaporizer a solution concentrating apparatus by direct contact with a gaseous coolant containing a vertical body with a lid and supply pipes for supplying the initial solution, discharging the evaporated solution and a vapor-gas mixture, bubbling tubes fixed in the cap and a circulating tube placed outside the bubbling tubes , the bubbling tubes are provided with an annular casing, made in the form of two coaxial cylinders, covering their lower ends and connected by upper bases, and cuttings of the original solution is placed along the axis of the casing.

FIG. t shows evaporator, longitudinal section; in fig. 2 shows section A-A in FIG. one.

The evaporator for concentrating the solutions by direct contact with the gaseous coolant has a vertical body 1, made in the form of a rotational body with a lid 2 and supply pipes for feed solution 3 for evacuating the evaporated solution and the vapor-gas mixture 5. In the lid 2 the bubbling tubes 6 are fixed a circulating pipe 7 is fixed. The lower ends of the bubbling pipes 6 are provided with an annular casing 8 made in the form of two coaxial cylinders 9 and 10, covering the lower ends of the pipes 6 and connected s upper bases. The pipe 3 supply of the original solution is placed along the axis of the casing 8,

Evaporator works as follows.

The gaseous coolant, for example, the products of combustion of fuel, through the bubbling tubes 6 enters the annular casing 8, from where it is distributed to the central part of the casing limited by the inner cylinder

9 and into the volume between the circulation pipe 7 and the outer cylinder 10 of the housing 8. The feed solution through the nozzle 3 is supplied to the central part of the housing 8, where it interacts in countercurrent with the gaseous coolant leaving the cavity of the casing 8. At the same time, the gaseous coolant in the volume between the circulation pipe 7 and the casing 8, moving in the flow with the solution, creates its natural circulation in the apparatus. One stripped off solution accumulates in the lower part of the apparatus.

and is continuously discharged through pipe k. The gas-vapor mixture is separated on louvered nozzles and is continuously removed from the apparatus through the nozzle 5.

The proposed evaporating apparatus, by making the casing annular and feeding the initial solution along the axis of the casing, provides countercurrent movement of media in the volume bounded by the casing internal cylinder and the flow movement with natural circulation in the volume between the casing outer cylinder and the circulation pipe. In this case, most of the coolant is supplied to the strand with the solution, since in addition to heat exchange, it is necessary to ensure its natural circulation. A smaller part of the coolant, the amount

which is determined by the volume of feed of the initial solution, enters the countercurrent. This is provided by the ratio of the diameters of the outer and inner cylinders.

casing.

Such a solution significantly intensifies the process of heat exchange between the contacting media and at the same time organizes the natural multiple circulation of the solution in the apparatus, which leads to a reduction in fuel and power consumption.

The economic effect from the introduction of the invention at a distillery with a capacity of 600 gave alcohol per day according to preliminary calculations will amount to 25 thousand rubles. And year on one an para.

Claims (2)

Invention Formula Evaporator for concentrating solutions by direct591218 contact with the gaseous coolant, comprising a vertical body with a lid and nozzles for supplying the initial solution, removal of one stripped off solution and a vapor-gas mixture, bubbling pipes fixed in the lid, and a circulation pipe placed outside the bubbling pipes, characterized in that the purpose of intensification of heat exchange, "on the bubbling tubes are equipped with an annular casing, made in the form two coaxial cylinders, covering their lower ends and connected by upper bases, and the connection pipe of the initial solution is placed along the axis of the casing. Sources of information taken into account in the examination 1, USSR Copyright Certificate No. 689691, “p. In 01 About t / 1i, 1975. 2. Udim P. G. Apparatuses with submersible burners. M., 1973 p. 223, ri, s. 105 one