1880results about "Furnace cooling" patented technology

A cooling apparatus for a fired body includes a transporting member for transporting a firing jig in which a ceramic fired body is housed; a plurality of blowers for cooling the ceramic fired body; and a suction mechanism for changing the atmosphere inside the firing jig from an inert gas atmosphere to an air atmosphere.

An oven with a sensor positioned to detect an event that will cause a decrease in the internal temperature of a tunnel. The oven includes a controller configured to increase the thermal output of a heating element in anticipation of the upcoming decrease in the internal temperature. In some embodiments, the oven is a conveyor over and the sensor is positioned to detect a food item approach the tunnel on a conveyor. In some embodiments, the amount of current provided to an electric heating element is increased by increasing the target temperature. In some embodiments, the amount of current provided to the electric heating element is increased by a predetermined offset.

A rotary tube furnace suitable for operation in controlled atmospheres at temperatures in the range of 1500 DEG to 2800 DEG comprises a generally horizontal rotatable graphite tube slidably supported on water-cooled split ring graphite bearings. The graphite tube is rotated by means of a stainless steel drive plate and is contained within a flexible atmospheric sealing assembly and enclosure for the containment of a selected atmosphere around and within the tube and allows for the co-current or counter-current flow of gas during operation. Radiation baffles in the interior of the graphite tube inhibit radiant heat loss at the ends of the tube. The graphite tube may be constructed in two or more sections having threaded ends for ease of installation as well as removal or replacement for maintenance purposes. A heating section of the tube is heated by a plurality of graphite electrical heating elements contained within an insulated heating chamber.

A continuous pressure letdown system connected to a hopper decreases a pressure of a 2-phase (gas and solid) dusty gas stream flowing through the system. The system includes a discharge line for receiving the dusty gas from the hopper, a valve, a cascade nozzle assembly positioned downstream of the discharge line, a purge ring, an inert gas supply connected to the purge ring, an inert gas throttle, and a filter. The valve connects the hopper to the discharge line and controls introduction of the dusty gas stream into the discharge line. The purge ring is connected between the discharge line and the cascade nozzle assembly. The inert gas throttle controls a flow rate of an inert gas into the cascade nozzle assembly. The filter is connected downstream of the cascade nozzle assembly.

A method and apparatus to increase the cooling rate of gas used in a batch annealing furnace of cold rolling mills under bypass cooling. The invention makes use of the higher heat transfer capacities of nanocoolants developed by a high-shear mixing of nanoparticles and stabilizers in a basic aqueous medium for cooling heated hydrogen flowing through a heat exchanger during bypass cooling of the batch annealing furnace. The nanofluid is prepared in a nanofluid preparation unit.

A heat exchanger 10 includes a conduit 12 for conveying cooling fluid relative to a body to be cooled. A heat transfer arrangement 62 is arranged in communication with an interior of the conduit 12, the heat transfer arrangement 62 and the conduit 12 together defining an assembly that is mountable adjacent the body to be cooled, convective heat exchange occurring, in use, due to movement of the cooling fluid relative to the body and the heat transfer arrangement 62 of the assembly and radiant heat exchange occurring between the body and at least part of the heat transfer arrangement 62 of the assembly.

Systems and methods provide a cooling device for a blast furnace that may prevent an excessive amount of coolant from entering the blat furnace and may be easily installed in a conventional blast furnace. Systems and methods may provide a cooling device for a blast furnace that may prevent an excessive amount of coolant from entering the blast furnace and may be simple and cost effective to manufacture. The end of a heat pipe (202) that is outside of the furnace may be configured to interact with a heat sink (210). The heat sink (210) may be for example, a separate amount of coolant that is circulated outside of the furnace, an evaporative cooling system, and/or any other system or method of cooling the heat pipe (202) that transfers heat from the heat pipe (202) to the heat sink (210). Because the coolant within the heat pipe (202) is sealed within the heat pipe (202), only the small, fixed amount of coolant that. is within the heat pipe (202) will enter the furnace should the cooling plate (200) rupture. Thus, substantial damage to the furnace, extensive repairs, and/or long periods of non-production may be avoided.

A mounting enclosure and an improved mounting arrangement for apparatus used in metal melting, refining and processing, particularly those apparatus adapted for steel making in an electric arc furnace, such as burners, lances and the like with supersonic oxygen lancing capability and injectors or the like for the introduction of particulate matter. The mounting enclosure is fluid cooled to survive the hostile environment of the electric arc furnace and is designed to occupy the step between the side wall and hearth of the furnace without any substantial change to the structure of the furnace. The mounting enclosure comprises a plurality of fluid cooling conduits surrounding an apparatus aperture and an injector aperture which are formed through the enclosure and adapted to mount an apparatus and an injector. The mounting arrangement includes utilizing the mounting enclosure to mount an apparatus with supersonic oxidizing gas lancing capability and an injector for particulate carbon in an electric arc furnace. Because the mounting enclosure is approximately the width of the step, the discharge openings of the apparatus and the injector are moved closer to the surface of the melt and toward the center of the furnace thereby providing increased efficiency. The discharge openings will now be extended to near the edge of the step so that the oxidizing gas flow pattern of the apparatus does not degrade the hearth material or other furnace equipment mounted nearby and the carbon flow pattern of the injector sufficiently agitates the slag to produce foaming.

A liner for use within a gasifier vessel includes a plurality of elongated channels and a plurality of ceramic sheaths. The elongated channels pass coolant through the gasifier. The ceramic sheaths surround the elongated channels.

The invention relates to a method and an apparatus for cooling a material to be removed from the grate of a fluidized bed furnace. Material at a high temperature is passed from the grate of the fluidized bed furnace into a fluidized bed cooler in charges of a given size by measuring the quantity of the material accumulating in the fluidized bed cooler. When the quantity of the material in the cooler has reached a predetermined limit value, the supply of material into the fluidized bed cooler is prevented. The charge is cooled in the fluidized bed cooler by fluidization air and via heat transfer into a cooling liquid circulation system and the temperature of the charge is measured. The charge is removed when the temperature of the charge has fallen to a predetermined limit value. The second end (5) of a supply conduit (3) is provided with a supply valve (15) actuated by a power means (16). A discharge conduit (14) is provided with a discharge valve (17) actuated by a second power means (18). Quantity detection means (19, 20) are provided to produce quantity data regarding the amount of material in a fluidized bed space (11), and temperature measuring means (21) are provided to produce temperature data. A control device (22) controls the first power means (16) to open and close the supply valve (15) and the second power means (18) to open and close the discharge valve (17) on the basis of the quantity data and temperature data and the predetermined limit values of quantity and temperature so that the loading of material into the fluidized bed space and its cooling and removal from the fluidized bed space take place in a charge-by-charge and cyclic manner.

A method and an apparatus for advantageously introducing a flame, a high velocity oxidizing gas, and a high velocity particulate flow into a furnace for metal melting, refining and processing, for example, steel making in an electric arc furnace. The steel making process of an electric arc furnace is made more efficient by shortening the time of the scrap melting phase, introducing a more effective high velocity oxidizing gas stream into the process sooner to decarburize the melted metal and introducing a more effective particulate injection to reduce FeO, form or foam slag and/or recarburize. Improved efficiency is obtained by mounting a fixed burner/lance and carbon injector lower and closer to the hot face of the furnace refractory at an effective injection angle. This mounting technique shortens the distance that the flame of the burner has to melt through scrap to clear a path to the molten metal, and shortens the distance the high velocity oxygen and high velocity particulates travel to the slag-metal interface. One method includes supplying a plurality of oxidizing reaction zones with the high velocity oxidizing gas to decarburize the melted metal and a plurality of particulate reaction zones with high velocity flows of particulate carbon for reducing FeO and/or forming foamy slag. The particulate reaction zones are located on the downstream side of the oxidizing gas reaction zones so as to minimize any effect of the reduction reaction on the decarburization reaction and to recover a part of the hot FeO produced in the oxidizing gas reaction zones.

Embodiments of apparatuses and methods for controlling heat for rapid thermal processing of carbonaceous material are provided herein. The apparatus comprises a reactor, a reheater for forming a fluidized bubbling bed comprising an oxygen-containing gas, inorganic heat carrier particles, and char and for burning the char into ash to form heated inorganic particles. An inorganic particle cooler is in fluid communication with the reheater. The inorganic particle cooler comprises a shell portion and a tube portion. The inorganic particle cooler is configured such that the shell portion receives a portion of the heated inorganic particles and the tube portion receives a cooling medium for indirect heat exchange with the portion of the heated inorganic particles to form partially-cooled heated inorganic particles.

The present invention discloses an improved rotary forced-air cooler, which comprises a double layer trolley, a supporting beam structure, a material blocking proof air duct sealing plate arranged at the connecting part of the double layer trolley and an air supplying system, a double layer trolley unit static seal device and an air duct device. The supplying system structure is based on a rectangular beam, a triangle beam is arranged on the rectangular beam, and a plurality of ventilation channels are arranged on the bevel edge steel plates at the both waists; an air duct pipe is arranged on the air vent of the material blocking proof air duct sealing plate, an inclined plate inclining upwards from the air vent at the bottom part of the air duct pipe has a transition to a horizontal plate, a stopping ventilation fence is added to the air duct pipe at the side of the trolley; two rubber sealing parts with extended bottom edges are arranged at the outer sides of the lower parts of inner and outer sealing plates of the double layer trolley unit static seal device, an ash baffle plate which can move up and down is hung at the inner side; an air water sealing wave subduing device adopting a damping plate is arranged on the air duct device. The present invention further improves the sealing performance of the equipment, and reduces energy consumption and pollution.

An improved method and apparatus for cooling the under-car channel of a tunnel kiln while minimizing migration of air between the above-car and under-car channels involves controlling or equalizing the mass flow of cooling air directed through the under-car channel and in particular through individual undercarriage cooling zones which can match individual heating zones of the tunnel kiln.

A blackbody furnace, mainly comprising a radiation cavity, a thermally insulating layer, a heater, a housing, a temperature controller, an airflow controller and a high-pressure air source. Besides, a gas channel is provided at the bottom of the radiation cavity to conduct the interior of the furnace chamber with the exterior. In the process of lowering the temperature of the blackbody furnace, the airflow controller could be actuated by the temperature controller or by an operator. Therefore, the room-temperature high-pressure air will enter the radiation cavity through the gas channel to fast cool down the radiation cavity. Finally, heat air will be vented from an opening at the front end of the radiation cavity. The present invention utilizes forced convection to enhance the efficiency of heat dissipation to fast lower the temperature of the blackbody furnace.

A thermal treatment apparatus and method for processing a wafer are provided. The thermal treatment apparatus includes a process chamber for thermally treating the wafer, a heating unit for heating the wafer in the process chamber, and a gas supply unit for supplying a gas and controlling a gas pressure differently by sections of the wafer. The heating unit is provided in at least one of the upper side and the lower side of the process chamber. The heating unit includes a plurality of heater blocks capable of controlling a temperature for sections of the wafer.

A water-cooled panel for the furnace wall and furnace roof of an electric-arc furnace is integrally fabricated of refractory bricks arrayed on the furnace inner wall in multiple regularly spaced rows to be exposed at the end surfaces and cooling water pipes installed between the rows of refractory bricks (2). A furnace exterior side of the refractory bricks and a furnace interior side of a cooling water pipe are overlapped in a vertical direction of the water-cooled panel, and the cooling water pipe is provided in between an upper and lower side of refractory bricks.

A coolant liner for a carbonaceous fuel (coal or petcoke) gasification vessel including a ceramic composite panel and a method of cooling a vessel. The panel includes at least two layers of woven yarns of fibrous material and walls extending between the layers. Accordingly, the layers and the walls define coolant channels that extend in a warp direction. Moreover, one of the layers may be less than about 0.08 inches thick. Materials used to create the composite panel may include alumina, chromia, silicon carbide, and carbon. Additionally, the liners may be shaped in an arc or have coolant channels which vary in diameter in the warp direction. Additionally, the liner may abut a structural closeout of the vessel. The coolant liner provides a significantly more durable component than previously employed liners and is especially well suited to demanding service environments.