JP2009159913A - Induction-heating apparatus for bioethanol production process - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction-heating apparatus for producing bioethanol, improved in energy utilization efficiency and enabling raw material wastefulness and ambient environmental pollution to be suppressed. <P>SOLUTION: The induction-heating apparatus comprises iron cores 1, induction coils 2 wound around the respective iron cores 1, and electrically conductive heating pipes 3 each wound with the induction coil 2 and provided with a through-hole, generating heat by exciting alternate current through the induction coil 2. A raw material for obtaining the objective refined bioethanol is injected into the through-holes of the electrically conductive heating pipes 3 to heat it up to a predetermined temperature by heat generation of the electrically conductive heating pipes 3 and keep it at that temperature. Thereby, as the heating and temperature retention of the raw material for obtaining bioethanol by refining is conducted by induction heating nearly 100% in thermal efficiency, energy saving is accomplished. With the heat source as electricity, the whole process is environmentally clean, enabling raw material wastefulness and ambient environmental pollution to be suppressed unlike the case with using heat exchanger and/or boiler when producing bioethanol. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an induction heating apparatus used in a bioethanol production process.

  In recent years, bioethanol using sugar millet, corn, waste wood, etc. as a raw material has been promoted from the viewpoint of environmental problems and the escape from crude oil dependence. FIG. 4 shows a general process for producing such bioethanol, and subdivides raw materials such as sugar millet, sugar beet, grains such as wheat and corn, or tree tips, branches, roots and waste wood. Then, the subdivided raw material is cooked, an enzyme is added thereto, and the mixture is heated to a predetermined temperature (about 75 ° C.) for saccharification.

Then, it cools to predetermined | prescribed temperature (about 30 degreeC), yeast is added, it is made to maintain at that temperature, and it ferments. After fermentation, ethanol is produced by heating to 100 ° C or higher. In addition, when sugar millet or sugar beet is used as a raw material, the raw material is squeezed to make molasses, the molasses is kept at about 30 ° C. and fermented, and then the yeast is taken out with a centrifuge and the rest is taken as 100 In some cases, ethanol is produced by distillation by heating to a temperature higher than C.

Thus, in the production of bioethanol, heating, cooling, fermentation temperature retention, and heating are repeated, and a heat exchanger and a boiler are used to perform these. As fuel for the boiler, fossil fuel (mainly heavy oil) or wood chips and firewood produced in the bioethanol refining process (for example, sugar milled rice cake) are used.

However, with the use of such heat exchangers and boilers, it is difficult to use heat efficiently because there is a lot of heat loss, and there is a risk of contaminating the surrounding environment when using fossil fuel, In the case where wood waste or firewood produced in the bioethanol purification process is used as boiler fuel, there is a problem that the raw material for bioethanol purification is wasted.

  The problem to be solved by the present invention is to increase the efficiency of energy use in the production of bioethanol, to suppress wasteful use of raw materials and contamination of the surrounding environment, and to solve such problems. .

  The present invention includes an iron core, an induction coil wound around the iron core, and a conductive heating pipe wound around the induction coil and formed with a through hole that generates heat from an AC excitation current of the induction coil. The raw material for purifying bioethanol is injected into the through hole of the conductive heating pipe, and the raw material is heated and kept at a predetermined temperature.

  In the present invention, in the production of bioethanol, it is possible to save energy since the raw material to be purified by bioethanol is heated and kept warm by induction heating with a thermal efficiency of nearly 100%. Further, since the heat source is electricity, it is clean, and wasteful use of raw materials and contamination of the surrounding environment as in the case of using a heat exchanger or a boiler can be suppressed. Furthermore, since induction heating is easy to manage the temperature, it is possible to easily and quickly change the heating temperature and maintain a predetermined temperature.

In the production of bioethanol, in order to increase the efficiency of energy use and to suppress wasteful use of raw materials and contamination of the surrounding environment, the raw material for bioethanol purification is injected into a pipe that is heated by induction, This was achieved by heating and keeping the raw material.

An embodiment according to the present invention will be described below with reference to FIG. FIG. 1 is a top view (a) and a side view (b) of an induction heating apparatus for a bioethanol production process according to an embodiment, FIG. 2 is a partial sectional view showing the configuration of an induction heating unit, and FIG. 3 is a connection diagram. 1 to 3, 1 is a tripod iron core, 2 is an induction coil wound around each of the tripod leg iron cores, and 3 is a conductive heating pipe wound around the outer periphery of each induction coil.

Each of the tripod iron cores 1 is fixed to the upper and lower yoke iron cores 1a and 1b by a fixing bracket 4, and has a closed magnetic circuit configuration. The end of each induction coil 2 is connected to the terminals (UX, VY, WZ) of the terminal block 11, and in this embodiment, each induction coil 2 can be excited by a three-phase alternating current. When each induction coil 2 is excited by an alternating current, an alternating magnetic flux is generated in the iron core 1, and a current is induced in the conductive heating pipe 3 by the magnetic flux, and the conductive heating pipe 3 generates Joule heat by the current. The temperature of the conductive heating pipe 3 can be easily adjusted by controlling the AC voltage applied to each induction coil 2.

A flange is formed at both ends of each conductive heating pipe 3 wound around the outer periphery of the induction coil 2, and a connecting pipe is appropriately connected to the flange. In the illustrated example, one end of the conductive heating pipe 3 wound around the outer periphery of the induction coil 2 at one end is connected to the injection pipe 5, and the other end is electrically conductive wound around the outer periphery of the induction coil 2 at the center. The other end of the conductive heating pipe 3 connected to one end of the conductive heating pipe 3 and the pipe 6 and wound around the outer periphery of the induction coil 2 at the center is wound around the outer periphery of the induction coil 2 at the other end. The other end of the conductive heating pipe 3 connected to one end of the conductive heating pipe 3 by the pipe 7 and wound around the outer periphery of the induction coil 2 at the other end is opened. A valve 8 is provided at an appropriate position of the conductive heating pipe 3 to take out the soot generated during bioethanol purification.

FIG. 1 shows an induction heating apparatus used when the raw material to be purified by bioethanol shown in FIG. 4 is saccharified. In this case, the branch pipe 9 branched to the injection pipe 5 is connected, and one of the branch pipes 9 is connected to the pipes 10 and 11 for injecting the raw material for bioethanol purification and the other for injecting the enzyme, respectively.

  The induction heating apparatus configured as described above feeds the raw material for bioethanol purification and the enzyme through the injection pipe 5 into the respective conductive heating pipes 3 and heats and keeps them at a temperature necessary for saccharification. After saccharification, the valve 8 is opened to remove the remaining soot, and the saccharified raw material is sent out from the opening at the other end of the conductive heating pipe 3. The fed raw material is cooled to a predetermined temperature (a temperature suitable for fermentation) with a cooler, transferred to a fermentation process, heated after fermentation, distilled, and extracted with bioethanol.

FIG. 1 shows an induction heating apparatus used when saccharifying a raw material to be purified by bioethanol, but the induction heating apparatus of this example can also be used in fermentation and distillation processes. Moreover, if a cooling function is loaded on the induction heating device, bioethanol can be purified consistently.

In the above embodiments, the induction heating device is configured by winding the induction coil and the conductive heating pipe around each of the tripod leg iron cores. However, the induction coil and the conductive heating pipe are wound around the monopod leg iron core. An induction heating device may be configured.

It is the top view (a) and side view (b) of the induction heating apparatus for bioethanol manufacturing processes which concern on the Example of this invention. It is a fragmentary sectional view which shows the structure of an induction heating part. It is a connection diagram of an induction heating part. It is process drawing which shows a bioethanol manufacturing process.

Explanation of symbols

1 Iron Core 2 Induction Coil 3 Conductive Heating Pipe 4 Fixing Bracket 5, 6, 7
Pipe 8 Drain valve 11 Terminal block

Claims (1)

An iron core, an induction coil wound around the iron core, and a conductive heating pipe wound around the induction coil and formed with a through hole that generates heat from an AC excitation current of the induction coil. An induction heating apparatus for a bioethanol production process, wherein a raw material for purifying bioethanol is injected into a through hole of a heating pipe, and the raw material is heated and kept at a predetermined temperature.

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