# US 2014/0150736 A1 · Heat recovery apparatus and heat recovery system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150736 A1 - Document ID: US20140150736A1 - Status: Published application - Kind: A1 - Application number: 14/238,627 - Filed: 2012-08-10 - Published: 2014-06-05 - Earliest claimed: 2011-08-12 - Assignees: Victor Tokuhan Co., Ltd. - Inventors: Hiroaki Hirata - Web page: https://patentgrep.com/patent/US20140150736A1 ## CPC - F22D 1/32: arranged to be heated by steam, e.g. bled from turbines - F22D 1/28: for direct heat transfer, e.g. by mixing water and steam - F22D 11/06: for returning condensate to boiler - F28B 1/02: using water or other liquid as the cooling medium - Y02P 80/15: On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply - F22D: PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS - F28B: STEAM OR VAPOUR CONDENSERS (condensation of vapours B01D5/00; steam engine plants having condensers F01K; liquefaction of gases F25J; details of heat-exchange and heat-transfer arrangements of general application F28F) - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A heat recovery apparatus recovers steam drain including at least one of steam used in a different device and drain where the steam used in the different device is condensed so as to recover heat contained in the steam drain. The heat recovery apparatus includes a pump, which circulates water accumulated in a tank through circulation pipes, an ejector, which is interposed in the circulation pipes and suctions the steam drain and mixes the steam drain with the circulating water so as to recover the steam drain, and a ball tap and a temperature controller, which perform temperature control of the water in the tank by replenishing the tank with tap water after a part of the water in the tank is discharged in the case where the water in the tank has reached a preliminarily set first temperature. ## Claims ### Claim 1 A heat recovery apparatus for recovering steam drain that includes at least one of steam used in a different device and drain where the steam used in the different device is condensed so as to recover heat contained in the steam drain, the heat recovery apparatus comprising: a pump configured to circulate water accumulated in a tank through a circulation pipe; an ejector interposed in the circulation pipe, the ejector being configured to suction the steam drain and mix the steam drain with the circulating water so as to recover the steam drain; and a first temperature control unit configured to perform a temperature control of the water in the tank by replenishing the tank with water from outside after a part of the water in the tank is discharged in a case where the water in the tank has reached a preliminarily set first temperature. ### Claim 2 (depends on 1) The heat recovery apparatus according to claim 1, further comprising a heat exchanging unit arranged at a side surface of the tank, the heat exchanging unit being configured to perform heat exchange using a convective flow due to a temperature difference with respect to water accumulated in a different tank. ### Claim 3 (depends on 2) The heat recovery apparatus according to claim 2, wherein the heat exchanging unit includes: at least one outlet through which the water accumulated in the tank flows out; and at least one inlet arranged at a lower side of the outlet, the water accumulated in the different tank flowing into the tank through the inlet. ### Claim 4 (depends on 1) The heat recovery apparatus according to claim 1, further comprising a permanent magnet arranged in a water flow passage at a discharge side of the ejector to remove irons in water. ### Claim 5 (depends on 1) The heat recovery apparatus according to claim 1, further comprising a separating unit configured to separate the steam drain into steam and drain, wherein the ejector is configured to suction steam separated from the steam drain by the separating unit and mix the steam. with circulating water so as to recover the steam. ### Claim 6 (depends on 5) The heat recovery apparatus according to claim 5, wherein the separating unit includes: a first pipe through which the steam drain is inserted; a second pipe through which the steam is inserted; and a third pipe through which the drain is inserted, wherein the first pipe branches into the second pipe and the third pipe, and the second pipe is coupled to an upper side of the first pipe. ### Claim 7 (depends on 3) A heat recovery system., comprising: the heat recovery apparatus according to claim 3; and a reserve tank in which water is accumulated, wherein the reserve tank includes: at least one outlet through which the water accumulated in the reserve tank flows out; and at least one inlet arranged at an upper side of the outlet, the water accumulated in the tank of the heat recovery apparatus flowing into the reserve tank through the inlet; a first pipe that couples the outlet of the heat recovery apparatus and the inlet of the reserve tank together so as to allow flow of water; and a second pipe that couples the outlet of the reserve tank and the inlet of the heat recovery apparatus together so as to allow flow of water. ### Claim 8 (depends on 7) The heat recovery system according to claim 7, further comprising: a first valve interposed in the first pipe to switch flow and shutoff of water in the first pipe; a second valve interposed in the second pipe to switch flow and shutoff of water in the second pipe; and a second temperature control unit configured to shut off the first valve and the second valve in a case where a temperature of the water in the reserve tank has reached a preliminarily set second temperature.