JPS599211B2 - three-phase fluidized bed - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION One of the inventors of the present invention previously proposed that a unit has a maximum diameter in the middle, the upper and lower portions are formed with gradually smaller diameters, and has upper and lower ends and an opening, and that this unit is constructed in one stage or Fermentation in multiple stages
Reactor (Patent Application No. 52-92774, 55-02
7 7 2 3), but as a result of various pilot experiments and practical research, and further research,
We have developed a unique device that can be used horizontally to expand its range of use.

The implementation of the present invention will be explained below based on the drawings.

As an example of the present cascade, FIG. 1 shows a plan view of two columns vertically, three columns horizontally, and three columns deep, and FIG. 2 shows a cross section along lines A and A' in FIG. 1.

Each stage or unit has a maximum diameter section 1 in the middle;
Open ends 2, 3, 4 on the top and bottom, and left and right end openings (5, 6, 7,
8) as the case may be.

The lowermost open end 2 has a gas dispersion plate 9 that contains gas as bubbles,
Further, a gas exhaust port 12 is provided at the top.

The left and right end ports 7 and 8 may be closed instead of being open.

The liquid entering from the liquid inlet 11 is fluidized and agitated by air bubbles together with particles, and the combined large bubbles are discharged upward, but the small air bubbles reversely flow down along the wall according to the flow of the liquid.

Vigorous circulation occurs within each unit, promoting gas-liquid absorption.

As shown in FIG. 2, each unit is equipped with a jacket for temperature regulation, but it may not be necessary depending on the type of bacteria.

Now, taking ethanol fermentation as an example, we will explain the case where the left and right end ports are closed.

Ethanol fermentation is so-called anaerobic fermentation, and if there is a lot of oxygen, bacterial growth will be stronger than alcohol production, so carbon dioxide gas produced during the fermentation process is recycled and used instead of air for stirring.

Carbon dioxide gas is dispersed through the dispersion plate 2.

As for the supply liquid, a sterilized sugar solution of about 10 to 20 Brix is introduced from the liquid inlet 11, and the liquid flows into the second stage chambers B and D.
, Pour the yeast from the bacteria inlet 14 a little into F.

The moromi leaving chamber B passes through two stages of mixing tanks in chambers A'' and B, is separated from the gas in a separator 12, and is sent through a liquid outlet 13 to a liquid-solid separator (not shown).

The liquid used for sugar powder will be reused.

The moromi leaving form D is in a 3-stage mixing tank in chambers A'', C, and D.
It exits the system through the separator 12.

Further, the moromi leaving the chamber F passes through four stages of mixing tanks in chambers κ, C, E, and F and exits the system.

Therefore, the ethanol concentration in the moromi leaving chambers B, D, and F gradually increases depending on residence time, initial sugar solution, etc.6
~15 wt%.

The amount of ethanol contained in the emitted carbon dioxide gas also increases.

As the number of stages increases, more ethanol is entrained in carbon dioxide gas in the Sunawachi Shichiromi, so it is possible to prevent the concentration of ethanol in the Sunawachi Romi from increasing.

The ethanol entrained in the gas is recovered by a condenser (not shown) or the like, and becomes carbon dioxide gas with less ethanol content, and is reused for stirring.

By preventing the ethanol concentration in Shichiromi from increasing, it prevents bacterial cell inhibition and deterioration caused by ethanol,
Ethanol production can be increased.

FIG. 3 shows an example in which there is one vertical stage and three horizontal stages, the middle stage is open at the top, bottom, left and right ends, and the liquid outlet is only in the final stage.

Therefore, Shichiromi is separated from the gas in the final stage separator.

As the liquid moves to chambers G, H, and I, the ethanol content increases, but since the ethanol is entrained with carbon dioxide gas at each stage, there is an advantage that the ethanol content does not increase.

The features of the three-phase fluidized bed of the present invention have been explained using the above two examples. In this explanation, a unit having one maximum diameter is referred to as a unit, but if there are two or more bulges, It is obvious that the body may be made in one piece, or the shape of the main body may be square, rectangular, trapezoidal, etc., similar to the same shape.

It goes without saying that the cooling or heating jacket will vary depending on the type of bacterial cells.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment according to the present invention, and FIG. 2 is a plan view of an embodiment according to the present invention.
The cross section along lines A and A' in the figure is shown. FIG. 3 shows another embodiment of the invention. 1... Maximum part of the unit, 2, 3, 4...
...opening end, 5, 6, 7, 8... side opening end,
9...Gas distribution plate, 10...Temperature control jacket, 12...Gas separator, 13...Liquid outlet, 14...Bacteria Population, A'', B, C, D, E,
F, G, H, I, ... Unit room, 11...
...Liquid population.

Claims (1)

[Claims] 1. A unit that has a maximum diameter in the middle, gradually becomes smaller in diameter at the top and bottom, and has openings at the top and bottom ends and in the horizontal direction, and one or more units stacked vertically in one or more stages is called a horizontal unit. Adjacent units are connected to each other through openings, and the bottom unit has a gas dispersion section that disperses gas as bubbles, and the top unit has a gas discharge port to form a cascade. A three-phase fluidized bed characterized in that it has one or more liquid inlets and liquid outlets.