JPH11116223A - Production of co2 in carbonated soft drink factory equipped with private power generation system and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a process for producing CO2 in a carbonated soft drink factory equipped with a private power generation system which makes working possible without problems even in a factory having site conditions under which electric power and CO2 cannot be assured. SOLUTION: This apparatus for production of CO2 comprises the private power generation system 41, a CO2 separating and recovering device 10, a drain freezing and condensing machine 20 and a CO2 liquefying device 30. The CO2 separating device 10 comprises a scrubber 11, a CO2 absorption column 12, a CO2 release column 13, a heat exchanger 14 for cooling and a heat exchanger 15 for preheating. The drain freezing and condensing machine 20 comprises two sets of freezing and concentrating columns 21, 22, a compressor 23, a condenser 24 and a final drain treating device 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing CO ₂ in a carbonated beverage factory equipped with a private power generation facility required for operating a carbonated beverage factory in a country where electric power and other infrastructures are not sufficiently developed. And its manufacturing equipment.

[0002]

2. Description of the Related Art In a conventional carbonated beverage factory, electric power and CO ₂ are also introduced and operated from the outside. Therefore, in order to obtain electric power, the exhaust gas corresponding to the used amount is at least discarded to the outside air, and the CO ₂ required for the production of carbonated beverages is supplied from the outside, and double waste is repeated. And formed a cause of high cost.

[0003] In particular, carbonated beverage factories in countries where social infrastructure development is lagging are often equipped with in-house power generation equipment and operate the factory by obtaining power from such equipment. CO ₂ had to be supplied from the outside.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems. In a carbonated beverage factory, electric power, water, and fuel for a boiler are required as utilities.
Stock solutions in the raw material surface, drinking water, but ensuring the CO ₂ is needed, also to allow the operation without problems in the factory with the location requirements that power and CO ₂ can not be ensured, carbonated beverage plants having a private power generation facilities The purpose of the present invention is to provide a method for producing CO _{2 and} an apparatus for producing the same.

That is, first, a private power generation facility is prepared, and CO ₂
For this purpose, an absorption liquid capable of selectively absorbing CO ₂ is used as a means for separating the waste gas from exhaust gas discharged from, for example, a diesel engine or the like of the power generation equipment. A gas absorption method is used in which the exhaust gas is brought into contact to absorb CO ₂ and then CO ₂ is vaporized and separated in a high-temperature heating state.

[0006] Then, low temperature absorption is required for low-temperature absorption by the absorbing solution, and low-temperature molten water obtained by freeze-concentrating wastewater from the carbonated beverage process is applied to the cold heat source. After replenishing cold heat, it is designed to be effectively recycled as boiler can water or process water.

[0007]

Means for Solving the Problems CO ₂ is produced as follows in a carbonated beverage factory equipped with the private power generation facility of the present invention. That is, in a carbonated beverage factory that produces by in-house power generation, the exhaust gas containing CO ₂ from the power generation equipment is used to absorb CO _{2 at} a low temperature by the absorbing solution and to separate the CO ₂ at a high temperature from the absorbed solution. With the regeneration of the liquid, CO
_The feature is that continuous collection of ₂ is possible.

Further, CO ₂ by the absorbing solution according to claim 1 is used.
Low temperature absorption is characterized by using the chilled water of the thawed water via a freeze-concentration treatment to treat the wastewater of the carbonated beverage process.

Further, the molten water used as cold heat according to the second aspect is characterized in that boiler can water can be reused except for the carbonated beverage filling water.

Next, an apparatus for producing CO ₂ in a carbonated beverage factory equipped with the private power generation equipment of the present invention is configured as follows. That is, a CO ₂ separation and recovery device that separates and recovers CO ₂ from exhaust gas of a private power generation facility, a CO ₂ liquefaction device that liquefies the recovered CO ₂ , and a CO ₂
A manufacturing apparatus, the CO ₂ separation and recovery device is contacted CO ₂ emission tower heat exchange with the hot separator the CO ₂ from the absorbing solution of CO ₂ which has absorbed the absorption tower and CO ₂ to low-temperature absorbed by the absorbing solution And a drainage freeze concentrator that supplies cold heat to the absorbing liquid via the heat exchanger and circulates boiler can water or process water.

[0011] Further, the drainage freeze concentrator according to claim 4 is characterized in that:
It is characterized by comprising two sets of freeze-concentration towers that alternately freeze-thaw wastewater and supply melted water to the heat exchanger, and a compressor and a condenser that supply a refrigerant to the freeze-concentration tower. .

[0012]

According to the present invention, the carbonated beverage plants doing the production by self-generation, by using the exhaust gas containing CO ₂ of from power generation facilities, ensuring CO ₂ which require the preparation of carbonated beverages Can be made possible.

A gas absorption method is used for separating and recovering CO ₂ from the exhaust gas. An absorbing solution capable of selectively absorbing CO ₂ , for example, an amine-based aqueous solution is used, and the exhaust gas is brought into contact with the absorbing solution at a low temperature. Selectively absorb CO ₂ at low temperature,
Then, the absorbed solution is heated to vaporize and separate CO ₂ , which is further liquefied or gasified by a liquefier and stored, so that it can be sequentially supplied to the carbonated beverage process.

According to the first aspect of the present invention, the low-temperature absorption of CO ₂ by the absorbing solution is achieved by a low-temperature molten water generated in the process of freeze-concentration processing of wastewater of a carbonated beverage production system through a freeze-concentration process. To use the cold heat. That is, the cold heat of the low-temperature clear water, which is the low-temperature molten water generated by the regenerating process by the freeze-concentration process, of the waste water in the carbonated beverage manufacturing process is effectively used.

Further, the molten water used as cold heat according to claim 2 is supplied as boiler can water other than the carbonated beverage filling water or water for the carbonated beverage process, and the wastewater from the process is subjected to freeze-concentration processing again. As a result, wastewater can be recycled and reused.

According to a fourth aspect of the present invention, there is provided a CO ₂ production apparatus in a carbonated beverage factory having a private power generation facility according to the present invention, wherein the CO ₂ separation / recovery separates and recovers CO ₂ from exhaust gas of the private power generation facility. Because it is composed of a device and a CO ₂ liquefaction device that liquefies the recovered CO ₂ , liquid or gaseous CO ₂ can be prepared from the exhaust gas discharged from the private power generation equipment, and is a main raw material for carbonated beverage factories. CO ₂ can be appropriately used.

[0017] Incidentally, CO ₂ separation and recovery device includes a CO ₂ emission tower and the heat exchanger to the hot separator the CO ₂ from the absorbing solution of CO ₂ which has absorbed the absorption tower and CO ₂ to low absorption by contact with the absorbing solution And a drainage freeze-concentrator that supplies cold heat to the absorbing liquid via the heat exchanger and circulates and supplies it as boiler water or carbonated beverage process water.

Further, the wastewater freeze-concentrator is configured to alternately freeze-concentrate the wastewater of the carbonated beverage production system and supply the melted water obtained to the heat exchanger of the CO ₂ separation and recovery device to cool the absorbent. A condensing freezing tower, comprising a compressor and a condenser cooler for supplying a refrigerant to the freezing / concentrating tower to melt ice crystals formed as a result of freezing or freezing of waste water, and thawing from the freezing / concentrating tower. The water can be recycled as boiler can water or carbonated beverage process water after use as cold heat to the absorbent, and the concentrated wastewater from the freeze concentration tower can be disposed of as sludge or discharged wastewater through final wastewater treatment. It is.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not merely intended to limit the scope of the present invention, but are merely illustrative examples unless otherwise specified. Absent. FIG.
1 is a system diagram showing a schematic configuration of a CO ₂ producing apparatus in a carbonated beverage factory equipped with the private power generation equipment of the present invention.

As shown in FIG. 1, the manufacturing apparatus of the present invention
It is composed of a private power generation facility 41, a CO ₂ separation and recovery device 10, a wastewater freeze concentration device 20, and a CO ₂ liquefaction device 30. C
The O ₂ separation and recovery apparatus 10 includes a scrubber 11 for performing gas-liquid separation.
A gas absorption method comprising a CO ₂ absorption tower 12, a CO ₂ emission tower 13, a heat exchanger 14 for cooling the aqueous solution from which CO ₂ is separated, and a heat exchanger 15 for preheating the aqueous solution having absorbed CO _2. is the absorption solution using an amine aqueous solution of about 20% which can selectively absorb normal temperature CO ₂ in, in contact with the exhaust gas is selectively absorbed CO ₂ at low temperature to the aqueous solution, the absorption of CO ₂ By heating the aqueous solution, CO ₂ is vaporized and separated from the aqueous solution.

The scrubber 11, which was followed by removal of water is sprayed water atomized by the pump 11b and the sprayer 11a to the exhaust gas containing moisture, the exhaust gas which has gas-liquid separation via scrubber 11 CO ₂ absorption It is introduced at the bottom of the tower 12. The CO ₂ absorption tower 12 is provided with a low-temperature aqueous solution for CO ₂ absorption cooled by the cooling heat exchanger 14,
By spraying in the form of a spray, and countercurrently contacting the exhaust gas introduced into the lower part to selectively absorb CO ₂ at a low temperature in the aqueous solution, and discharge the insoluble non-absorbable gas out of the tower through the upper vent hole. . The low-temperature aqueous solution having absorbed the CO ₂ is heated by the pump 12 b through the heat exchanger 15 for preheating, and is introduced into the upper part of the CO ₂ discharge tower 13.

The CO ₂ discharge tower 13 has a heating unit 13
b, a sprayer 13a is provided on each of the upper parts,
a) spraying the heated aqueous solution downward through a;
By further raising the temperature by the heating section 13b provided at the lower portion, the absorbed CO ₂ is vaporized, and the CO ₂ is released from the upper portion. The high-temperature aqueous solution stored in the lower part of the CO ₂ discharge tower 13 and vaporized and released from the CO ₂ is introduced into the preheating heat exchanger 15 via a pump 13 c to release heat, and further transmitted to the cooling heat exchanger 14. is introduced, it becomes a low temperature aqueous solution is cooled by cold heat of the low-melting water from wastewater freeze concentrator 20 in heat exchanger 14, it is to be introduced into the reflux to the top of CO ₂ absorber 12.

The wastewater freeze-concentrator 20 comprises two sets of freeze-concentration towers 21 and 22, a compressor 23, a condenser 24 including a cooling tower 24a, and a final wastewater treatment unit 26. The wastewater discharged from washing, cooling, etc. is freeze-condensed and the frozen ice crystals are melted to separate low-temperature clarified water and concentrated water, and the clarified water is passed through a cooling heat exchanger 14 to a boiler. The water is returned to the carbonated beverage process 40 as canned water or process water, and the concentrated water passes through the final wastewater treatment device 26 and is discarded as sludge.

The freeze-concentration towers 21 and 22 are provided with refrigerant pipes 21a and 22a, respectively, at the inner axes thereof. For example, as shown in the drawing, the high-temperature and high-pressure refrigerant compressed by the compressor 23 is supplied to the refrigerant pipe of the freeze-concentration tower 22. When flowing through the refrigerant pipe 22a in the direction of arrow A, the ice crystal 22b already formed on the surface of the refrigerant pipe 22a is melted, and further reaches the condenser 24 where it is cooled and condensed by the cooling water from the cooling tower 24a. Then, the condensed refrigerant is introduced into the freeze concentration tower 21 and the refrigerant pipe 21
a is operated as an evaporator to freeze the surrounding waste water and form ice crystals 21b on the surface of the refrigerant pipe 21a.

The melt water generated by the melting of the ice crystals 22b in the freeze concentration tower 22 is guided as clarified water in the direction of arrow B, and introduced into the cooling heat exchanger 14 to cool the high-temperature aqueous solution after releasing CO _2. CO ₂ absorption tower 1 as a low-temperature aqueous solution
2, while the molten water is refluxed as boiler water or carbonated beverage process water. The concentrated water flowing from the freeze concentration tower 22 in the direction of arrow C is treated in the final wastewater treatment device 26 and discharged to the outside as sludge.

The CO ₂ liquefaction unit 30 includes a mist separator 31 comprising a washing tower for removing the CO ₂ separation and recovery device dust and sulfides than CO ₂ separated by 10 or the like, the CO ₂ passing through the separator 31 25 / 40Kgf / c
It comprises a compressor 32 for compressing to m ² , a liquefaction process 33 for liquefying a part of the compressed CO ₂ , and a gas holder 34 for storing compressed gas as it is.

The liquefaction process 33 includes a cooler 35 for cooling the compressed CO ₂ , a dehumidifier 37 for removing moisture from the cooled CO ₂ to produce a clean gas, and a chlorofluorocarbon for liquefying the clean gas. Liquefier 38 equipped with a refrigerator, liquefied C
Purification tower 39 which removes nitrogen, oxygen, etc. by evaporating O ₂ under reduced pressure
And a storage tank 39a for storing purified CO ₂ .

As described above, the required CO ₂ is supplied from the storage tank 39 a or the gas holder 34 to the carbonated beverage process 4.
It is configured so that it can be supplied to 0 at will.

[0029]

According to the above configuration of the present invention, electric power and CO ₂
Also in carbonated beverage production plants with site conditions can not be ensured, and by providing the private power generation equipment, it is possible to obtain a CO ₂ from its exhaust gas, to convert the wastewater sodas process clarified water in the manufacturing process CO ₂ can be absorbed at a low temperature and can be reused under reflux as boiler can water or process water.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a schematic configuration of a CO ₂ producing apparatus in a carbonated beverage factory provided with a private power generation facility of the present invention.

[Explanation of symbols]

10 CO ₂ separation and recovery device 11 scrubber 12 CO ₂ absorption tower 13 CO ₂ emission tower 14 cooling heat exchanger 15 preheating heat exchanger 20 waste water freeze concentrator 21 freeze concentration tower 21a, 22a refrigerant pipe 21b, 22b Ice Crystal 23, 32 Compressor 24 Condenser 26 Final wastewater treatment device 30 CO ₂ liquefaction device 31 Mist separator 33 Liquefaction process 34 Gas holder 35 Cooler 37 Dehumidifier 38 Liquefier 39 Purification tower 40 Carbonated beverage process

Claims (5)

[Claims] 1. In a carbonated beverage factory that produces by private power generation, the exhaust gas containing CO ₂ from a power generation facility is used to absorb CO _{2 at} a low temperature by an absorbing solution and to raise CO ₂ to a high temperature from the absorbed solution. Regeneration of the absorbent to be separated
A method for producing CO ₂ in a carbonated beverage factory equipped with a private power generation facility, wherein continuous recovery of O ₂ is enabled. _2. The low-temperature absorption of CO ₂ by the absorbing solution is as follows:
CO ₂ production process in carbonated beverage plants having a private power generation equipment according to claim 1, characterized in that to use a cold melting water through the freeze concentration process for processing waste water sodas process. 3. The CO ₂ production in a carbonated beverage factory equipped with an in-house power generation facility according to claim 2, wherein the molten water used as the cold heat can reuse boiler can water other than the carbonated beverage filling water. Method. 4. A carbon dioxide beverage plant, comprising: a CO ₂ separation and recovery device for separating and recovering CO ₂ from exhaust gas of a private power generation facility; and a CO ₂ liquefaction device for liquefying the recovered CO _2.
An O ₂ production apparatus, wherein the CO ₂ separation and recovery apparatus comprises: an absorption tower that absorbs CO ₂ at low temperature by contact with an absorbing solution;
₂ comprising a CO ₂ discharge tower for separating CO ₂ from the absorbing liquid at a high temperature and a heat exchanger, supplying cold heat to the absorbing liquid via the heat exchanger, and boiler can water or carbonated beverage. A CO ₂ production apparatus in a carbonated beverage factory equipped with an in-house power generation facility, which is provided with a drainage freeze concentrator that circulates and supplies system water. 5. The wastewater freeze-concentrator comprises two sets of freeze-concentration towers for alternately freezing and thawing the wastewater and supplying melted water to the heat exchanger, and a compressor for supplying a refrigerant to the freeze-concentration tower. 5. A CO ₂ producing apparatus in a carbonated beverage factory equipped with a private power generation facility according to claim 4, comprising a condenser and a condenser.