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18937 results about "Flue gas" patented technology

Flue gas is the gas exiting to the atmosphere via a flue, which is a pipe or channel for conveying exhaust gases from a fireplace, oven, furnace, boiler or steam generator. Quite often, the flue gas refers to the combustion exhaust gas produced at power plants. Its composition depends on what is being burned, but it will usually consist of mostly nitrogen (typically more than two-thirds) derived from the combustion of air, carbon dioxide (CO2), and water vapor as well as excess oxygen (also derived from the combustion air). It further contains a small percentage of a number of pollutants, such as particulate matter (like soot), carbon monoxide, nitrogen oxides, and sulfur oxides.

Method and system for processing oil field wastes

The embodiment of the invention discloses a method and a system for processing oil field wastes. The method for processing the oil field wastes comprises the following steps: conveying initial materials to a heating cavity, and heating the heating cavity by using high-temperature flue gas, so as to obtain mixed steam and solid residues; carrying out condensation and separation on the mixed steam, so as to obtain oil, water and a noncondensable gas, wherein the oil and the noncondensable gas are used for combusting to obtain the high-temperature flue gas, and the solid residues are discharged out of the heating cavity. According to the method, the heating cavity is indirectly heated by using the high-temperature flue gas, so that the initial materials inside the heating cavity are subjected to thermal decomposition, solid residues free of oil, the noncondensable gas and oil are obtained from the mixed steam generated by thermal decomposition after a series of treatments, and then the noncondensable gas and oil are used for combusting to generate the high-temperature flue gas. Compared with the prior art, the method disclosed by the invention has the advantages that decomposition is carried out without adding a cracking agent, and thermal decomposition can be directly carried out on the oil field wastes in different regions, therefore, the method and the system are better in universality.

System and method for carbon dioxide capture and sequestration

A method and a system capable of removing carbon dioxide directly from ambient air, and obtaining relatively pure CO2. The method comprises the steps of generating usable and process heat from a primary production process;
    • applying the process heat from said primary process to water to co-generate substantially saturated steam, alternately repeatedly exposing a sorbent to removal and to capture and regeneration system phases, wherein said sorbent is alternately exposed to a flow of ambient air during said removal phase, thereby enabling said sorbent to sorb, and therefore remove, carbon dioxide from said ambient air, and to a flow of the co-generated steam during the regeneration and capture phase, after the sorbent has adsorbed the carbon dioxide, thereby enabling regeneration of such sorbent, and the resultant capture in relatively pure form of the adsorbed carbon dioxide. This process can also be carried out in more efficient form by admixing with the air a minor amount of a flue gas or an effluent gas containing a higher concentration of carbon dioxide than exists in the atmosphere, most preferably following a pre-treatment. The carbon dioxide can be stored for further use, or sequestered permanently following the capture: The adsorbent is exposed to air at substantially ambient conditions and the adsorbent is exposed to the co-generated steam at a temperature in the range of not greater than about 130° C. The system provides the sorbent substrate and equipment for carrying out the above method, and provides for obtaining purified carbon dioxide for further use in agriculture and chemical processes, including manufacturing hydrocarbon fuels, or for permanent sequestration, as needed.
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