Method and apparatus for dissolving and mixing gas and liquid

A method of dissolving and mixing a gas and a liquid comprising the steps of:

• providing an injection portion for injecting a liquid in a horizontal direction at an upper part of a mixing container filled with a gas;
• providing a restrictor, which is a restricted channel, for maintaining a pressurized state in said mixing container downstream of said mixing container;
• injecting a liquid into the mixing container from the injection portion to cause a reaction or dissolution between the gas in said mixing container and the injected liquid in the pressurized state and to cause a liquid including the gas dissolved therein to flow from a lower part of said mixing container;
• and
• injecting the gas into a liquid supplying pipe line upstream of said injection portion at a pressure slightly higher than the supply pressure of the liquid when the gas in said mixing container is reduced as a result of the dissolution of the gas into the liquid therein.

A method of dissolving and mixing a gas and a liquid comprising the steps of:

• providing an injection portion for injecting a liquid in a horizontal direction at an upper part of a mixing container filled with a gas;
• providing a restrictor, which is a restricted channel, for maintaining a pressurized state in said mixing container downstream of said mixing container;
• injecting a liquid into the mixing container from the injection portion to cause a reaction or dissolution between the gas in said mixing container and the injected liquid in the pressurized state and to cause a liquid including the gas dissolved therein to flow from a lower part of said mixing container;
• and
• injecting the gas into said mixing container at a pressure slightly higher than the pressure in said mixing container when the gas in said mixing container is reduced as a result of the dissolution of the gas into the liquid therein.

An apparatus for dissolving and mixing a was and a liquid comprising:

• a mixing container filled with a gas;
• an injection portion provided at an upper part of the mixing container for injecting a liquid into said mixing container in a hermetic state in a horizontal direction;
• an exit port for said liquid provided at a lower part of said mixing container;
• and
• a restrictor, which is a restricted channel, provided downstream of the exit port for maintaining a pressurized state in said mixing container, wherein a liquid is injected into said mixing container to cause a reaction or dissolution between the gas in said mixing container and the injected liquid and to supply a liquid including the gas dissolved therein through said exit port and restrictor, wherein said injection portion comprises a suction device including:
• a restriction which is a restricted part of a fluid channel;
• a gas intake port connected to a channel slightly downstream of the restriction for introducing a gas from the outside;
• and
• an expanded portion which is a gradually expanded pipe line provided downstream of said restriction, and wherein a pipe line downstream of said exit port is branched, a restrictor, which is a restricted channel, is provided on one of the pipe lines for maintaining a pressurized state in said mixing container;
• and an on-off valve is provided on the other pipe line.

An apparatus for dissolving and mixing a gas and a liquid comprising:

• a mixing container filled with a gas;
• an injection portion provided at an upper part of the mixing container for injecting a liquid into said mixing container in a hermetic state in a horizontal direction;
• an exit port for said liquid provided at a lower part of said mixing container;
• and
• a restrictor, which is a restricted channel, provided downstream of the exit port for maintaining a pressurized state in said mixing container, wherein a liquid is injected into said mixing container to cause a reaction or dissolution between the gas in said mixing container and the injected liquid and to supply a liquid including the gas dissolved therein through said exit port and restrictor, and further comprising a diaphragm provided below said injection portion in said liquid injecting direction, wherein said exit port is mounted below said diaphragm and substantially directly under said injection portion and a through hole formed on said diaphragm toward said injection portion.