摘要:
A method and system for cost effectively converting a feedstock using thermal plasma, or other styles of gassifiers, into a feedwater energy transfer system. The feedstock can be any organic material, or fossil fuel. The energy transferred in the feedwater is converted into steam which is then injected into the low turbine of a combined cycle power plant. Heat is extracted from gas product issued by a gassifier and delivered to a power plant via its feedwater system. The gassifier is a plasma gassifier and the gas product is syngas. In a further embodiment, prior to performing the step of extracting heat energy, there is provided the further step of combusting the syngas in an afterburner. An air flow, and/or EGR flow is provided to the afterburner at a rate that is varied in response to an operating characteristic of the afterburner. The air flow to the afterburner is heated.
摘要:
A system for generating steam supplies of coal another material to one or more processing chambers. Each processing chamber includes a plasma arc torch that heats the material in the presence of water and a treatment gas at an extremely high temperature. A product gas stream is delivered from each processing chamber to a heat recovery steam generator (HRSG). Each HRSG generates steam that is used to drive a steam turbine. The processing chambers and HRSGs are fluidly connected so that the product gas streams moves from a processing chamber, to a HRSG, to another processing chamber, and then to another HRSG, etc. Within any of the HRSGs, or after the final HRSG, water in the product gas may condense to liquid water that may be redirected to any of the processing chambers. In addition, CO2 from the final HRSG may be redirected into any of the processing chambers to facilitate further reactions in the chambers.
摘要:
A ground supported power boiler is described combining a refractory lined and insulated conical floor; an insulated cylindrical combustion chamber; a cylindrical furnace with water tube wall; a rectangular convective section; a single vertical steam drum; tangential injection of the fuel and combustion air; means for fluidizing the fuel bed; means for selectively stripping particulates from the flue gases; multi-stage particulate stripping and filtering from flue gases, means for using the walls of steam drum as steam/water droplet separator, means for recirculating and capturing heat from the flue gases; means for pressurizing the interior of the boiler above atmospheric pressure; means for heating and drying fuel prior to feeding the fuel to the boiler; means for creating hydrogen shift reaction; means for eliminating any need for sootblowing; and designed to not require the use of an induced draft fan.
摘要:
Provided is an air pollution control system including: a boiler, a denitration apparatus; an air heater; a precipitator; a desulfurization apparatus; a dehydrator; a concentration apparatus that is configured to remove some of water of dehydrated filtrate from the dehydrator; a spray drying apparatus provided with a spray unit that is configured to spray concentrated/dehydrated filtrate concentrated by the concentration apparatus; and a flue gas introduction line through which branch gas branched from the flue gas is introduced to the spray drying apparatus.
摘要:
Sorbent compositions containing iodine are added to coal to mitigate the release of mercury and/or other harmful elements into the environment during combustion of coal containing natural levels of mercury.
摘要:
In order to provide a method for the thermal conditioning of an auxiliary material, which, to clean a crude gas stream loaded with an organic pollutant, is configured to be introduced into the crude gas stream and together with the organic pollutant forms a stable system of pollutant and auxiliary material, which can be carried out easily and in a resource-saving manner, it is proposed that the method includes the following steps: feeding the system of pollutant and auxiliary material and a carrier gas stream that has been heated in relation to normal conditions into a thermal conditioning device; chemical conversion of at least a part of the organic pollutant to produce a conditioned auxiliary material; separating the conditioned auxiliary material from the auxiliary material loaded with an organic pollutant by transportation by means of a gas flow; and removing the conditioned auxiliary material from the thermal conditioning device.
摘要:
A method and apparatus for treating waste material having organic components and radioactive agents. The method including the steps of gasifying the waste material at temperature between 600-950° C. in a reactor to form a gaseous material. The gaseous material is cooled to a temperature between 300-500° C., after the cooling the solid fraction including the radioactive agents are removed.
摘要:
This invention proposes a method of removing pollutants from high temperature gases prior to their introduction in to a heat exchanger of a steam generating boiler within a power generation system. The method places a filter system (100) in a hot gas flow path upstream of a waste-heat boiler. The filter system has at least two banks of substantially hollow elongate filters (110), each of which filters particles from the gas flow as it flows from an external surface thereof to an internal surface thereof. Valves (104, 106) enable each bank of filters to be isolated from the hot gas flow path. The method included periodically isolating at least one bank of filters while passing hot gasses through at least another of the banks of filters, and cleaning the isolated bank of filters. After cleaning the filters (110) lime is injected into the flow path so that it coats the outer surface of the filters (110) to produce a loose lime coating thereon.
摘要:
A system and method suitable for the removal of pollutants from gases with a circulating dry scrubber system having a circulating dry scrubber reactor containing a fluidized bed adapted to contact the gas with a dry reagent within the fluidized bed. The system includes a housing fluidically coupled to the reactor, a filter array within the housing, and an internal hopper within the housing and adapted to return at least some of the particulates to the fluidized bed within the circulating dry scrubber reactor. The scrubbed gas stream exits the circulating dry scrubber reactor and flows upward between an interior of the housing and an exterior of the internal hopper before contacting the filter array. The exterior of the internal hopper is exposed to the scrubbed gas stream, and the scrubbed gas stream is not recirculated to the circulating dry scrubber reactor to maintain the fluidized bed therein.
摘要:
An uptake apparatus is arranged to extract a stream of off-gas containing carbon monoxide from a process vessel. At least one gas conditioning train receives and conditions the stream. An outlet expels at least a portion of the stream. A portion of the stream is separated to form a recycle stream. An eductor apparatus combines the stream with the recycle stream, to decrease the temperature and increase the static pressure of the stream. The stream is maintained at a positive gauge pressure.