JPH074212B2 - How to use heat in the beer manufacturing process - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat utilization method in a beer production process in which steam is used as a heat source in various processes for producing beer, and is particularly required for various processes. The present invention relates to a heat utilization method in a beer manufacturing process in which steam, hot water, and cold water, which are various heat sources, are created by using steam generated from a boiler to effectively utilize heat energy.

"Prior Art" To schematically explain the manufacturing process of beer based on the drawings, malt crushed by a malt crusher 22 is added to the saccharification tank 1 and the saccharification kettle 2 by adding warm water of about 50 ° C This is used as a broth, and the starch in the malt is converted into sugar by the action of an enzyme. The wort is heated to about 75 ° C. and then filtered into clear wort in the filtration tank 3 and supplied to the boiling kettle 4.

In the boiling kettle 4, boiling of hops to the wort is carried out (100 ° C.) using steam to coagulate protein and extract hop flavor. Then, the wort thus obtained is separated from the heat-coagulated product in the heat-coagulated product separation tank 12, and then the wort can be cooled with cold water to form wort. In such operation of the pot and tank, washing with warm water is performed every time.

Therefore, in such a beer production line, the heating,
A large amount of steam, cold water or hot water is used for cooling and cleaning,
In the conventional manufacturing process, a steam boiler, cold water is a refrigerator, and hot water is manufactured by using a part of the steam from the boiler as a heat source. The manufacturing method requires energy for boiler combustion and a power source or fuel for driving the refrigerator, which causes a problem of high operating cost.

For this reason, conventionally, a technique of sucking and compressing the steam discharged from the boiling pot 4 with a compressor to reuse it for heating wort, and recovering heat from the drain of the boiling pot 4 to produce hot water (No. 1) 1 prior art) or steam discharged from the boiling pot 4 is used to make hot water, which is used as hot water for washing a filter tank or the like, and at the same time, an absorption refrigerator is used as a part of the hot water. There is a technique (second conventional technique) of driving to produce cold water.

"Problems to be solved by the invention" However, since the above-mentioned conventional techniques are all partial heat utilization of steam and drain discharged from the boiling pot, it is not always possible to obtain a sufficient amount of hot water, Again, the reduction in boiler combustion costs is insignificant.

In the first prior art, however, the power cost of the refrigerator cannot be reduced because no consideration is given to the power of the refrigerator for producing cold water.

In order to solve such a drawback, the second conventional technique discloses a technique of driving an absorption refrigerator using a part of the hot water, but the absorption refrigerator has a cooling capacity of 3%. Since it is necessary to double the cooling water load, the desired cold water may not be obtained unless almost all of the hot water obtained using the steam discharged from the boiling pot is used. The hot water to be used must be produced by using the steam from the boiler, which is not necessarily an efficient use of heat energy.

In view of the drawbacks of the prior art, the present invention aims to significantly reduce the combustion cost of the boiler and reduce the operation cost of the refrigerator for producing cold water, while efficiently utilizing the heat energy generated in the beer production process. The purpose is to provide usage methods.

"Means for Solving Problems" In order to achieve the technical problem, the present invention is an expander driven by steam supplied from a boiler 11.
A heat pump compressor 15 is connected to 14 to form a heat pump system 23 including an evaporator 19 and a condenser 17, so that cold water and hot water can be obtained by passing raw water through the evaporator 19 and the condenser 17 of the heat pump system 23, respectively. The point that the cold water is used for cooling wort at the end of the charging step, while the hot water is heated to a predetermined temperature and then used for charging water or washing water, etc. Suggest usage.

[Operation] According to the technical means, since the heat pump system 23 is driven by the steam supplied from the boiler 11 and the cold water for cooling the wort is obtained by the heat pump system 23, the refrigerator is driven naturally. Electric power for use becomes unnecessary, and the electric power cost can be greatly reduced.

Further, in the heat pump system 23, since hot water can be produced together with cold water, the hot water is heated to a predetermined temperature by using other waste heat energy, and then supplied to a hot water tank to be used as a feed water and a wash water. By using
The steam production cost of the boiler 11 can be significantly reduced as compared with the conventional hot water production using steam.

In addition, the expander 14 that drives the heat pump system 23
By making the back pressure type, the exhaust steam pressure can be increased and used for heating in the beer charging process, and the combustion cost of the boiler 11 can be further reduced by that amount.

Furthermore, in a system configured so that the steam generated from the beam boiling pot 4 is compressed by the compressor 5 to be reused, a gas turbine or an internal combustion engine (hereinafter referred to as a gas turbine or the like) that applies a rotational force to the compressor 5 By configuring the boiler 11 to operate by using the exhaust heat of 1) as a heat source, the combustion cost of the boiler 11 can be further reduced.

[Embodiment] Hereinafter, a preferred embodiment of the present invention will be exemplarily described in detail with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but merely illustrative examples. Nothing more than.

The drawings show a beer charging step in the embodiment of the present invention, which has a malt grinder 22, a saccharification step 24, a filtration tank 3, a boiling pot 4, and a thermal coagulation product separation tank 12 as described above, A procedure for producing steam, hot water, and cold water supplied to the various devices and processes will be described.

In the figure, 10 is a gas turbine or the like driven by fuel gas, and a generator 8 functioning as an induction motor, a transmission 6 having a clutch means 7, and a compressor 5 are connected in series on the output shaft side thereof. The steam generated from the boiling kettle 4 is introduced into the compressor 5, compressed by the compressor 5 and then introduced into the boiling kettle 4 again, and after being heated by the boiling kettle, it is introduced into the heat exchanger 18 and the heat The medium temperature water heated by the condenser 17 of the heat pump system 23, which will be described later, is heated by the exchanger 18 and then discharged.

When the wort is not being boiled in the boiling pot 4,
The clutch means 7 releases the connection between the generator 8 and the compressor 5, and only the generator 8 is rotated by using the driving force of the gas turbine 10 or the like, and the electric power obtained from the generator 8 is supplied to the beer production machine. It is used for various devices in the factory in the process.

On the other hand, the exhaust gas obtained while driving the gas turbine 10 or the like is used as a heat source of the boiler 11, the steam obtained by the boiler 11 is used as a heating source of the saccharification step 24, and part of it is expanded. It is led to the machine 14 and used as a drive source of the expander 14.

The expander 14 is connected to the compressor 15, and constitutes a heat pump system 23 together with the condenser 17 and the evaporator 19.

In the heat pump system 23, for example, by introducing raw water 20 at 20 ° C. from a well or the like to the evaporator 19 and the condenser 17, the raw water 20 first introduced to the evaporator 19 is cooled to around 5 ° C. It is used for cooling the wort at the end of the charging step, is heated to about 90 ° C. in the cooling step, and is used as hot water 21 used in the saccharification step 24.

On the other hand, the raw water 20 guided to the condenser 17 side is used as cooling water for the condensation and heated up to around 38 ° C, and then guided to the condenser 16 of the expander for driving the heat pump to around 65 ° C. Get hot water. After that, it is heated by the steam drain from the boiling pot 4 to obtain the hot water 21 at 85 ° C to 90 ° C.

Then, the hot water 21 heated to 85 ° C. to 90 ° C. is used as charging water for the saccharification step 24 and further as hot water for cleaning the filtration tank and the like.

According to this embodiment, the heat of condensation of the heat pump system 23, which has been conventionally discarded, can be finally heated to 85 ° C. to 90 ° C. and can be effectively used, and the heat pump system 23 can be driven by the hot water 21 manufacturing process. Since it is carried out with steam for the purpose of saving the driving power of the heat pump system 23,
The effect of the present invention can be achieved smoothly.

In the production line, when the amount of hot water used is small, the expander 14 is replaced with a back pressure type and the steam passing therethrough is used as a low pressure steam line for heating the saccharification process 24. It may be configured to supply.

[Advantages of the Invention] As described above, according to the present invention, it is possible to significantly reduce the steam production cost, and to eliminate the use of electric power or fuel for driving a chiller for producing cold water and heat generated in the beer production process. It has various remarkable effects such as efficient use of energy.

[Brief description of drawings]

The drawings are process diagrams showing a schematic configuration of a beer production line according to an embodiment of the present invention.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sentaro Miura 1-7-25 Imagawa, Suginami-ku, Tokyo (72) Inventor Kiyoshi Furushima 2-16-14 Nishikata, Bunkyo-ku, Tokyo (72) Inventor Junji Matsuda Chiba Prefecture Narashino City 2-6 2-303 (72) Inventor Shigeru Sakashita 3-18-10 Takamatsu, Nerima-ku, Tokyo

Claims (3)

[Claims] 1. A method for utilizing heat in a beer manufacturing process, wherein steam generated from a boiler is used as a heat source in various processes for manufacturing beer, wherein an expander driven by steam supplied from the boiler is used as a compressor. To form a heat pump system including an evaporator and an expander, cold water and hot water are obtained by passing raw water through an evaporator and a condenser of the heat pump system, respectively, and the cold water is a wort liquid at the final stage of the wort charging step. The method for utilizing heat in the beer manufacturing process, characterized in that the hot water is heated to a predetermined temperature and then used as charging water or washing water 2. A method for utilizing heat in a beer manufacturing process according to claim 1, wherein the steam discharged from the expander is used for heating in the wort charging process. 3. The boiler is provided with a compressor, which compresses steam generated from a beer boiling pot to reuse the steam, and uses exhaust gas from a gas turbine or an internal combustion engine, which imparts rotational force to the compressor, as a heat source. A method for utilizing heat in the beer production process according to claim 1, wherein the method is for heating.