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Class 122/406.1 - CIRCULATION


Subclass of Class 122 - Liquid heaters and vaporizers
Definition: Devices not otherwise classified comprising means for regulating
No. of patents: 64
Last issue date: 02/21/2012


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NumberTitleIssue Date
8117998Hot water supplying system
The present invention relates to a hot water supplying system that includes a preheating-circulating system, which heats water to maximally reduce the time to attain a temperature set by a user, and is designed to use a portion of preheating energy for heating, prev...
02/21/2012
8006651Reverse-flow condensing economizer and heat recovery method
A condensing heat exchange economizer wherein upwardly flowing hot flue gas is redirected to flow in a downward direction over a bundle of heat exchange tubes carrying a counter-flowing heat exchange medium to form condensate and cool the flue gas, and the condensat...
08/30/2011
7587996Circulation system for sliding pressure steam generator
A steam generator circulation system is provided and includes a boiler feed pump for forcing water through an economizer, and through the waterwall tubes of an evaporator. A separator receives a mixture of steam and water and sends the steam to a steam utilization u...
09/15/2009
7387090Method for control of steam quality on multipath steam generator
The present invention relates to systems and methods for control of a steam generating process having a steam generator with multiple water flow conduits disposed in a convection section and a radiant section. A first conduit may have a first diverted convection sec...
06/17/2008
7331313Continuous steam generator with circulating atmospheric fluidised-bed combustion
A continuous steam generator with a circulating atmospheric fludized-bed chamber is defined by encircling walls essentially on all sides, comprised of gas-permeable tubular walls provided with essentially vertical tubes, and comprises at least one funnel in its lowe...
02/19/2008
7284567Liquid level controller
A liquid level controller for maintaining the level of liquid in a tank at a predetermined height includes a housing with an upper and lower section wherein the upper section is connected to a liquid supply and the lower section is submerged in liquid the level of w...
10/23/2007
7270086Steam generator
A stream generator wherein a continuous evaporating heating surface is disposed in a heating gas duct through which a heating gas flows in an approximately horizontal manner. The continuous evaporating heating surface comprises a plurality of steam-generating pipes ...
09/18/2007
7249573Pressurized steam boilers and their control
A method of controlling the operation of a pressurised steam boiler (50) heated by a burner (20), which includes the steps of a) monitoring the level of water in the boiler (50), b) monitoring the pressure of steam in the boiler (50), c) ...
07/31/2007
7243618Steam generator with hybrid circulation
A hybrid vapor generator has at least one evaporator with tubes arranged in sections, one section including a natural circulation loop with a separating drum and downcomer(s), and another section being a pump assisted once-through circulation section. ...
07/17/2007
7049465Process for energy recovery in processes for the preparation of aromatic carboxylic acids
This invention relates to a process for the manufacture of aromatic carboxylic acids by exothermic liquid phase oxidation of an aromatic feedstock. More particularly, this invention relates to the efficient energy recovery of the exotherm produced by the liquid phas...
05/23/2006
6962051Control of flow through a vapor generator
In a Rankine cycle system wherein a vapor generator receives heat from exhaust gases, provision is made to avoid overheating of the refrigerant during ORC system shut down while at the same time preventing condensation of those gases within the vapor generator when ...
11/08/2005
6672258Intermediate heat exchanger-incorporated type steam generator
An intermediate heat exchanger-incorporated type steam generator having an intermediate heat exchanger tube 20 and a steam generating heat exchanger tube 22 disposed separately in a vessel 10 storing a secondary coolant 14 therein. A pump mechanism is mad...
01/06/2004
6647932Compact boiler with tankless heater for providing heat and domestic hot water
A small and compact boiler for providing hot water for indoor heating and domestic hot water and method of operation are provided. The boiler includes a three way valve configured to circulate boiler water through a heating circuit when indoor heat is req...
11/18/2003
6591789Device to generate heat by spraying liquid at high speed and high pressure
A high-speed and high-pressure injection heat-generating device is provided, and enables liquid injected at a high speed and under a high pressure to become heated by the force of the friction and resistance generated from the collisions of liquid molecul...
07/15/2003
6557500Evaporator and evaporative process for generating saturated steam
An evaporator in a steam generator extracts heat from high temperature gases to convert heated water into saturated steam. The evaporator includes two sections--a once-through section and a circulation section, both of which include tubes located in the f...
05/06/2003
6526922Steam generator
A steam generator for converting water to steam by the transfer of heat from a heating medium includes two or more water/steam circuits. Each water/steam circuit has at least one evaporator for transferring the heat from the heating medium to the water. A...
03/04/2003
6526921Method for operating a closed hot-water installation and apparatus to be used therewith
Method and apparatus for operating a closed hot water installation provided with a pipe system, a boiler, heat exchangers, an expansion tank, a water make-up provision and a de-aerator, the method including the steps of opening a non-return valve to allow...
03/04/2003
6427636Method and plant for heating a liquid medium
The invention relates to a method of heating a liquid medium by means of a first thermal system (2, 3, 4, 7, 12, 13) and at least one second thermal system (5, 6, 6A, 15, 16) following said first thermal system (2, 3, 4, 7, 12, 13), which thermal systems ...
08/06/2002
6401669Condensing boiler
A condensing boiler includes a heat exchanger with a burner adjacent to the top of the heat exchanger. There is an exhaust for condensate adjacent to the bottom of the heat exchanger. There is a intake system including an air conduit, a fuel inlet and a f...
06/11/2002
6401667Method and plant for heating a liquid medium
A method of heating a liquid medium by means of a first thermal system and at least one second thermal system following the first thermal system and a plant for carrying out the method. The thermal systems each have at least one heat exchanger through whi...
06/11/2002
6170440Gas fired booster
The invention is a gas fired water booster comprising a holding tank, a centrifugal pump, an infrared burner enclosed by a woven ceramic fiber sleeve, a primary and a secondary heat exchanger, and a gas/air supply source. Preferably, the tank and the burn...
01/09/2001
6026801Plug core heat exchanger
An apparatus (10) for transferring heat to a fluid from combustion gases including a housing (12) extending between a first end (14) and a second end (16). The apparatus further includes a burner (24) in which a combustible gas and oxygen react to form ho...
02/22/2000
5988118Water supplying method for a boiler
A method for supplementing fresh water into a boiler, which can effectively exhaust air from a pipeline circuit connected with the boiler, is disclosed. The method includes the steps of: a) determining whether a supply of the supplementary water into the ...
11/23/1999
5887552Fluid heat generator, with selective control of the flow
The diathermic fluid heat generator comprises a plurality of pipe nests for fluid circulation, which define the internal walls of a combustion chamber, where the diathermic fluid is heated directly by radiation; and at least a pipe nest in a conveying pat...
03/30/1999
5870977Boiler with conductive pipe lining and containing magnetic granules
A boiler in which water is heated by passing through a furnace has a plurality of pipes for carrying water through the furnace. Each pipe is formed from high-carbon steel and is provided with a non-magnetic, electrically conductive inner lining. The linin...
02/16/1999
5588400Method of generating steam in a forced-through-flow boiler
A method and apparatus for generating steam in a forced-through-flow boiler. During operation, water is conveyed through a preheater, an evaporator and, if needed, a superheater. For such a boiler operated with waste heat, the evaporator is divided into a...
12/31/1996
5575244Heat recovery boiler with induced circulation
The invention relates to a boiler (1) wherein at least one steam generating circuit comprises an ejector (25) capable of providing induced circulation of water in the boiler in normal operating conditions. The corresponding water/steam separation reservoi...
11/19/1996
5419285Boiler economizer and control system
An increased efficiency boiler is provided, which, instead of trying to eliminate steaming in the economizer, designs the economizer to permit steaming, and a control is provided for the boiler which takes into account the heat input to the boiler as well...
05/30/1995
5357907Water heater with reduced localized overheating
A water and/or space heater is provided in which water is circulated to prevent the localized overheating or vaporization thereof....
10/25/1994
5334291On-site, controlled waste concentrator and solvent regenerator apparatus
An apparatus for removing non-volatile residues and impurities from a used solvent includes a self-scrubbing heating distillation subassembly for separating purified solvent for reuse and a controlled waste collector subassembly for overflowing concentrat...
08/02/1994
5201282Upflow/downflow heated tube circulating system
A fluid flow circuit for a boiler having a combustion chamber and an exhaust passage. In one embodiment there is provided at least one upflow evaporative generating bank module in the exhaust passage and at least one downflow evaporative generating bank m...
04/13/1993
5060601Water-tube boiler and a heating installation equipped with such a boiler
A water-tube boiler is disclosed, comprising a body in which are located the furnace and a series of vertical tubes serving as heating and exchange surface between the furnace and the water to be heated flowing through these tubes, two respectively upper ...
10/29/1991
5007804Fuel reactor
A fuel reactor particularly adopted for the efficient combustion of wood and wood-product fuels includes a core comprised of an inner fuel tube and an outer gas tube. Fuel is introduced into one end of the fuel tube and the combustion process is initiated...
04/16/1991
4913097Steam generator that burns brown coal with cinders that vary in composition
To make it possible to burn brown coals with cinders that vary in composition in the fluidized bed (6) of one and the same steam generator, one of the flue surfaces (12 or 13) accommodated in flues (2 and 3) downstream of the bed is exploited by way of co...
04/03/1990
4850427Device for controlling overheating and scaling in an apparatus for heating a fluid and apparatus equipped with such a device
An overheating and scaling control device for a fluid heating apparatus, such as a domestic water heater, removes the hot fluid in the heater when demand ceases. A piston (46) mobile within a case (28) separates the latter into two compartments (32, 36) r...
07/25/1989
4843824System for converting heat to kinetic energy
A system for converting heat to kinetic energy, the system characterized by a fluid driven motor responsive to an introduction of high pressure fluid for driving a selected power train, and a pressure generator for introducing the high pressure fluid to t...
07/04/1989
4708849Process for energy storage and recovery
A system and method for recycling first and second quantities of process heat from a vapor having substantially the total initial process heat where the vapor is channeled from at least one apparatus in which a process having a vapor utilization phase is ...
11/24/1987
4694783Multiple boiler heating system with improved venting and heat reclamation
Disclosed is a heating system of the multiple condensing boiler type wherein hot exhaust gases are in heat exchange relation with the condensate in a manifold common to the boilers. The exhaust gas conduits from the boilers open into the manifold at a lev...
09/22/1987
4665864Steam generator and method of operating a steam generator utilizing separate fluid and combined gas flow circuits
A steam generator and method for operating same in which a plurality of beds of combustible particulate material are established and air is introduced to each of the beds for fluidizing the beds. The flue gases and entrained fine particulate material from...
05/19/1987
4660510Model steam generator having a thermosyphon heating means
A model steam generator for simulating the environment inside a nuclear steam generator in order to monitor the condition of the heat exchange tubes of the nuclear steam generator is disclosed herein. The model steam generator includes an electrically-pow...
04/28/1987
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