摘要:
Methods for forming glass compositions from cullet include providing the cullet to a submerged combustion melter and melting the cullet with the aid of heat generated upon the combustion of a hydrocarbon from landfill gas and, in some cases, a polymeric material, in the presence of an oxidant. The melted cullet is then directed to a fiberization unit to generate a glass composition, such as vitreous fiber. The glass composition can be used to form various structural components, such as glass fiber insulation. Methods and systems provided herein can be used to form low global warming potential products.
摘要:
A method and a plant for capturing CO2 from an exhaust gas from combustion of carbonaceous material are described. At least a part of the combustion gas is introduced into a biol fuel boiler as an oxygen containing gas, to increase the concentration of CO2 and decrease the oxygen concentration in the gas before introduction into an absorption column for separation of CO2.
摘要:
An assembly is provided for purifying toxic gases from production processes by thermal conversion in a reactor chamber and subsequent treatment of reaction products with a sorption agent in a washing device in order to bind water-soluble reaction products and to elute solid reaction products. The reactor chamber has an external wall and an internal wall, the internal wall tapering at its base in the form of a funnel at a predetermined angle. A unit for thermal treatment of toxic gases is located on the reactor chamber, sealing the top of the chamber. An inner face of the internal wall of the reactor chamber comprises a film of water flowing downwards in a uniform manner. The exterior of the internal wall is surrounded by a cloak of water. A waste gas outlet and a connection for a water circuit are located at the lower end of the tapering internal wall.
摘要:
An oven for baking a batch of parts has a housing having side walls and a top wall defining a closed container with a closed top end and an open downwardly facing bottom end. Loading/unloading occurs at the bottom end onto a carriage raised to the top end where baking occurs. On each side is provided an array of heating elements below the top. A shield is located in front of the heating array so as to block direct radiation onto the parts to prevent over-heating as the carrying arrangement passes the heating array to be unloaded. The shield generates an upwardly flowing air stream to carry the heat to the top. The heating elements are mounted with their lower end in a connection box with a collar and insulated heat shield above the box to keep the electrical connections cooled.
摘要:
A method of combusting ammonia is described, in which an exhaust gas containing varying amounts of at least ammonia and hydrogen is conveyed from a chamber to a combustion nozzle (34) connected to a combustion chamber (36). A combustion gas for forming a combustion flame within the chamber is supplied to the chamber. Depending on the relative amounts of ammonia and hydrogen exhaust from the chamber, hydrogen is added to the exhaust gas so that, when the exhaust gas contains ammonia, the gas combusted by the flame contains at least a predetermined amount of hydrogen.
摘要:
A method and apparatus for reducing air pollutants associated with dry process, precalciner cement manufacturing is shown. Raw feed meal used in cement production is heated in a special heating chamber to drive off volatile compounds, such as organic materials and salts of ammonia. Preferably, the feed meal is heated to a temperature of at least 350° F. The gases that are driven off flow to the precalciner where they are combusted and rendered harmless. Heat is provided by diverting at least a portion of the exhaust gases from the cement pyroprocessing kiln to the special heater. The raw feed meal is indirectly heated using a heat exchange wall between the feed meal and the kiln exhaust gas flow. In addition, a base-containing material such as lime or precalcined feed meal, may be added to the raw feed before treatment meal to promote the breakdown of inorganic ammonium compounds, thereby releasing gaseous ammonia which is also destroyed upon subsequent combustion. Hot precalcined meal may also be used to provide some of the heat required to heat the raw feed meal in the special heating chamber.
摘要:
The present invention relates to a method for purifying process waste gases by introducing them into a waste gas purification system that includes a reaction chamber and by post-treating the reaction products that leave the reaction chamber in a washing or sorbtion chamber with an associated washing agent circuit. The type and amount of harmful substances in the process waste gas are continuously measured before the waste gases enter the waste gas purification system. In addition, the type and amount of harmful substances in the reaction products that leave the waste gas purification system are simultaneously determined directly at the exit of the system and the measuring signals are used to regulate the operating parameters of the waste gas purification system.
摘要:
A method and apparatus for igniting a gas flare includes a housing (12, 112) and at least one flow passage (14, 120) extending through the housing (12, 112). A body (16, 124) made from a heat conducting material in communication with the at least one flow passage (14, 120). A heating element (18, 126) embedded in the body (16, 124) maintains the body (16, 124) at a temperature above an ignition temperature of a combustible mixture of combustion air and combustible gases. The combustible mixture passing along the at least one flow passage (14, 120) is ignited immediately upon coming in contact with the body (16, 124). The apparatus can be a separate from the gas flare or can be incorporated into the construction of the gas flare.
摘要:
A tangential fired boiler includes a circumferential wall defining a combustion zone, the circumferential wall being generally rectangular when viewed along a generally horizontal cross-section. A fireball is disposed within the combustion zone, the fireball rotating about an imaginary axis when viewed along a generally horizontal cross-section. A corner member is disposed proximate to at least one corner of the combustion zone, with a plurality of fuel inlets disposed along the corner member. The plurality of fuel inlets inject fuel into the combustion zone, and at least some of the plurality of fuel inlets inject fuel in a direction which is angled with respect to a normal of the corner member and upstream relative to a direction of rotation of the fireball.
摘要:
A control system for a regenerative thermal oxidizer in which contaminated air is first passed through a hot heat-exchange bed and into a communicating high temperature oxidation (combustion) chamber, and then through a relatively cool second heat exchange bed. The apparatus includes a number of internally insulated, ceramic filled heat recovery columns topped by an internally insulated combustion chamber. Contaminated air is directed into heat exchange media in one of said columns, and oxidation is completed as the flow passes through the combustion chamber. From the combustion chamber, the now clean air flows through another column containing heat exchange media, thereby storing heat in the media for use in a subsequent inlet cycle when the flow control valves reverse. The resulting clean air is directed via an outlet valve through an outlet manifold and released to atmosphere or is recirculated back to the oxidizer inlet. A combustible fuel such as natural gas is added to the inlet-contaminated air prior to its entry into the hot heat exchange column when the contaminant concentration in the contaminated air falls below a predetermined level. The oxidizer is preferably integrated with a web dryer, such that hot aire from the combustion chamber is supplied to the dryer.