摘要:
A cooking oven comprising a cooking cavity and an exhaust gas purification assembly comprising a self-heated filter element comprising a gas-permeable, electrically conductive silicon carbide material and a current supply structure operable for self-heating said filter element. Preferably, said purification assembly comprises a self-heated filter element comprised of a foamed silicon carbide structural element.
摘要:
A system for forming a subsurface wellbore includes a rack and pinion system including a chuck drive system. The chuck drive system operates a drilling string. An automatic position control system includes at least one measurement sensor coupled to the rack and pinion system. The automatic position control system controls the rack and pinion system to determine a position of the drilling string.
摘要:
A heater of this invention includes an insulating base made of a ceramic, a resistor buried in the insulating base, and leads connected to end portions of the resistor, in which both the resistor and the leads contain electrical conductors and insulating ceramic particles dispersed in the electrical conductors and the insulating ceramic particles contained in the resistor are smaller than the insulating ceramic particles contained in the leads.
摘要:
A system for treating a subsurface formation includes a plurality of conduits at least partially located in a portion of a hydrocarbon containing formation. At least part of two of the conduits are aligned in relation to each other such that electrical current will flow from a first conduit to a second conduit. The first and second conduits include electrically conductive material and at least one of the first and second conduits is perforated or configured to be perforated. A power supply is coupled to the first and second conduits. The power supply electrically excites at least one of the conductive sections such that current flows between the first conduit and the second conduit in the formation and heats at least a portion of the formation between the two conduits.
摘要:
An electrode for a resistance analytical furnace has a crucible-engaging surface and an end spaced from the crucible-engaging surface having a plurality of grooves formed therein. A manifold mounted on the end of the electrode defines a dust recovery plenum and includes an outlet communicating with the plenum for coupling to a vacuum source to remove debris from the electrode. The improved electrode and electrode cleaning manifold positioned on the electrode provides a turbulent airflow for removal of dust and debris from an analytical furnace.
摘要:
A humidifier includes a tub configured to contain a supply of water and a heater including a first polymer film having an electrically conductive circuit provided upon a surface. The first polymer film is electrically insulating and the tub is formed of molded resin and the heater is molded at least partially within the resin. A respiratory apparatus for delivering a flow of breathable gas to a patient includes the humidifier. A method of humidifying a flow of pressurized breathable gas includes passing the flow of pressurized breathable gas over a supply of water contained in a tub. The tub is formed of molded resin and a heater including a first polymer film having an electrically conductive circuit on a first surface is molded at least partially within the resin.
摘要:
A continuous casting installation includes a furnace (2) for heating metal to a first liquid metal temperature, a degassing unit (4), a filter (6), a heating unit (8) and a casting machine (10). The casting machine (10) includes a pair of casting rollers and a nozzle arranged to deliver liquid metal into a nip between the casting rollers, such that the metal solidifies as it passes through the nip. The heating unit (8) is located between the furnace and the casting machine, and is thermostatically controlled to heat the liquid metal to a second liquid metal temperature.
摘要:
The pipe heater manufacturing process comprises a vacuum making process A for introducing a stainless steel pipe into a furnace and evacuating the inside of the furnace, for example, to a pressure of 0.5 Torr, a pipe end sealing process B for brazing and sealing plugs 3 to both ends of the pipe under vacuum and brazing, a process C for forming a lower insulating layer by repeating several times the steps of screen printing and insulating glass material and baking it in a state in which the two ends of the pipe are sealed, and similar formation process D of a heat generating layer and formation process E of an upper insulating layer. With this method, baking in an oxygen-free state inside the pipe makes it possible to obtain the oxidation-free clean state without high-temperature corrosion on the inside of the pipe having the fluid to be heated flowing therein and to manufacture a pipe heater in which a heating response was improved by forming thin heating layer and insulating layer.
摘要:
Ceramic raw powder containing conductive ceramic powder is mixed with a prescribed quantity of a molding assistant containing carbon component. This mixture is molded into a prescribed shape of a resistive heating element to thereby produce a heating element mold. A composite mold is prepared by embedding the heating element mold into molds of a ceramic substrate. The composite mold is sintered at a sintering temperature of 1700.degree. C. or higher. During a process of rising temperature to the sintering temperature, the composite mold is kept in an oxygen containing atmosphere having an oxygen partial pressure of 2.times.10.sup.-4 to 1.0 Torr for 7 minutes or longer at a temperature of 1200.degree. C. or higher.
摘要:
This ceramic heater is increased in bulk density and decreased in production cost by using an unsintered composite as an unsintered filling member filled in a protective pipe without application thereto of a filling pressure while preventing a heating element from deteriorating. In this ceramic heater, the heating element capable of heating by flowing electricity therethrough is disposed in the protective pipe, which is filled with the unsintered composite. In the unsintered composite, inorganic compound particles are disposed between insulating ceramic particles. In this ceramic heater, the heating element is fixed to the inner wall surface of the protective pipe with a heat-resistant glass layer. The heat-resistant glass layer is partially penetrated into the unsintered composite. The open end portion of the protective pipe is hermetically sealed with a heat-resistant sealing member while allowing extension of lead wires from the end portion of the protective pipe.