摘要:
A method and an apparatus for processing a substance by a hydrothermal reaction in which certain chemical reactions, such as the breakage and recombination of molecular chains, leaving of contained molecules, oxidation or reduction, is performed with an object material to be processed and water of usually not lower than 200 DEG C put in a coexistant state. The supercritical reaction apparatus for processing a substance by putting a mixed phase of an object material to be processed and a liquid medium in a supercritical condition of the medium is provided with a substantially vertical cylindrical reaction tank (22) which has object material feed ports (46, 48) at an upper end thereof and a product discharge port (60) at a lower end thereof, a supercritical region being formed in an upper portion of the interior of the reaction tank with a subcritical region formed in the other end portion thereof, and the object material to be processed and the product being moved in one direction toward the lower end of the interior of the reaction tank.
摘要:
A hydrothermal reaction is performed on an aqueous medium without adding an oxidizing agent, and then another hydrothermal reaction is performed in the presence of an oxidizing agent, thereby reducing a chemical oxygen demand of the aqueous medium. An apparatus for performing a hydrothermal reaction has a fluid inlet being capable of introducing an oxidizing agent in a fluid form during a hydrothermal reaction.
摘要:
Improved method for feeding a waste containing organic solids into a boiler after it has been subjected to a hydrothermal reaction treatment in the presence of water comprises the steps of holding a slurry containing said waste under a high-temperature and high-pressure condition to cause a hydrothermal reaction such that an acidic slurry is formed during part of or throughout the process of said hydrothermal reaction, thereby reducing the content of oxygen in said waste relative to the carbon atoms in the building molecule of said waste, concurrently causing any halogens in said building molecule to be transferred into said slurry, then cooling said slurry, dewatering the cooled slurry and feeding the dewatered slurry into the combustion section of the boiler. In a preferred embodiment, the waste slurry to be subjected to the hydrothermal reaction is sorted into two portions for separate storage, one being a waste slurry the pH of which will increase as a result of the hydrothermal reaction and the other being a waste slurry the pH of which will decrease during the hydrothermal reaction, and the two slurries are combined together and subjected to the hydrothermal reaction with their relative amounts of supply being adjusted such as to form an acidic slurry either during part of or throughout the process of the hydrothermal reaction. According to the method, wastes can be supplied as a mass of high heat value into a boiler in such a manner that the organic matter is transferred by a smaller amount into the aqueous phase during a hydrothermal reaction and there is no scale deposit on the surfaces of those areas of the system components in contact with the liquid.
摘要:
A hydrothermal reaction is performed on an aqueous medium without adding an oxidizing agent, and then another hydrothermal reaction is performed in the presence of an oxidizing agent, thereby reducing a chemical oxygen demand of the aqueous medium. An apparatus for performing a hydrothermal reaction has a fluid inlet being capable of introducing an oxidizing agent in a fluid form during a hydrothermal reaction.