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Evaporation concentration device

A technology of evaporative concentration and evaporation tank, which is applied in the field of evaporative concentration devices, can solve the problems of reduced thermal conductivity and low heat transfer efficiency, and achieve the effect of uniform thin film evaporation

Inactive Publication Date: 2011-11-09
SASAKURA ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are problems in this device that the heat transfer efficiency is low, and the scale adheres to the surface of the heat transfer tube, resulting in a decrease in the thermal conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0039] Hereinafter, the evaporation concentration device in the embodiment of the present invention will be described in detail with reference to the drawings. figure 1 A schematic configuration diagram showing the evaporation concentration device in the embodiment of the present invention, figure 2 Shows an exploded perspective view of its important parts.

[0040] This evaporative concentration device 1 includes a horizontal tube type closed evaporator 2. The solution to be concentrated (stock solution) is supplied from the stock solution supply line 3 ( figure 1 ) Is supplied to the lower part of the evaporation tank 2. A pair of header boxes 4 and header boxes 5 are provided on the left and right sides of the evaporation can 2. A plurality of heat transfer tubes 6 are horizontally erected between the header box 4 and the header box 5.

[0041] The solution in the lower part of the evaporation tank 2 is supplied to a sprayer 11 such as a nozzle provided in the upper part of th...

Embodiment approach 2

[0084] Figure 7 In order to show the structure of the evaporation concentration device 1a of other embodiment of the present invention, the figure 1 The parts with the same reference signs. At that Figure 7 In, and figure 1 Differently, the inlet side header 4 is shown on the left side, and the outlet side header 5 is shown on the right side.

[0085] The evaporative concentration device 1a of the present embodiment includes a condenser 22 that condenses vapor from the evaporator can 2.

[0086] The condenser 22 includes a plurality of heat transfer tubes 26 in the tank body 25, and includes a cooling water inlet 27 leading into the heat transfer tube 26 and a cooling water outlet 28 from the heat transfer tube 26.

[0087] The tank body 25 is connected to the turn-back chamber 5a of the header 5 on the outlet side of the evaporation tank 2 through a pipeline 29, and on the other hand, is connected to the upper part of the evaporation tank 2 and the outlet chamber of the header 5 o...

Embodiment approach

[0094] Although in each of the above-mentioned embodiments, the plurality of heat transfer tubes are divided into a plurality of heat transfer tube groups, in the vertical direction, the number of tubes in the heat transfer tube group decreases as the number of the heat transfer tube groups increases, and the heat transfer from the bottom The heat transfer tube group with the largest number of tubes supplies heating steam. However, on the contrary, in other embodiments of the present invention, the plurality of heat transfer tubes may also be divided into a plurality of heat transfer tube groups, in the vertical direction, The heat transfer tube groups are arranged so that the number of tubes in the upper heat transfer tube group increases sequentially, and heating steam is supplied from the heat transfer tube group with the largest number of tubes above.

[0095] The arrangement of the heat transfer tubes 6 in addition to the above-mentioned four-corner pitch arrangement, for exa...

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Abstract

The invention provides an evaporation concentration device. In the invention, a plurality of heat transfer tubes with external diameter of 15mm-26mm are divided into a plurality of heat transfer tube groups in a closed evaporating pot, and the number of the tubes in the heat transfer tube groups sequentially is decreased or increased along the upward direction; heating steam sequentially flows from the heat transfer tube group with the maximum tube number to those with less tube numbers; and a supply dispersion quantity of solution in the heat transfer tube group per horizontal projection area is 10m<3> / h / m<2>-60m<3> / h / m<2>.

Description

Technical field [0001] The present invention relates to an evaporation concentration device that evaporates water in a solution for concentration. More specifically, the present invention relates to an evaporation concentration device that compresses all or part of heating vapor from the outside or vapor generated from a solution as a heat source for heating the solution. Background technique [0002] As a conventional evaporative concentration device, for example, there is a thin-film down-flow evaporative concentration device that causes a liquid to flow down the inner wall surface of a heat transfer tube in a thin film under the action of gravity, and evaporates the liquid for concentration. This thin film down-type evaporation concentration device is described in a utility model publication, for example, Japanese Patent Publication No. 49-42658. [0003] As other existing evaporative concentration devices, there is a dip tube type evaporative concentration device that flows li...

Claims

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Application Information

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IPC IPC(8): B01D1/22B01D1/04
Inventor 平野悟中村克平西村靖史
Owner SASAKURA ENG CO LTD
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