A recuperative burner (20) for introducing a process air (A) to be treated into the combustion space (15) of the combustion chamber of a thermal process air treatment device (10) and for discharging the flue gas (E) from the combustion space (15) comprises a heat transfer sector (40) having an internal space (46) in which a plurality of process air tubes (43) for introducing the process air (A) to the combustion space (15) extend. It is proposed to equip the recuperative burner (20) with at least one flue gas tube (60) for discharging the flue gas (E) from the combustion space (15), comprising an open input opening (61) in the combustion space (15) and passing into the heat transfer sector (40) and comprising, in the section inside the heat transfer sector (40), at least one tube wall opening (63) for introducing the flue gas (E) into the internal space (46) of the heat transfer sector (40), through which the process air tubes (43) pass, for the purpose of heat transfer from the discharging flue gas (E) to the inflowing process air (A).

A method and apparatus for treating waste gas for an solvent-based carbon capture unit. The process involving the use of a dry sorbent injection (DSI) unit to remove sulfur compounds and fine particulate matter from flue gas are described. The treated flue gas is used to preheat the rich solvent stream from the carbon capture unit. Flue gas from an FCC regenerator, for example, is used to make superheated steam and saturated steam. The process allows for increased thermal energy recovery, decreased water utility and increased equipment reliability.

Configurations and related processing schemes of direct or indirect (or both) inter-plants heating systems synthesized for grassroots medium grade crude oil semi-conversion refineries to increase energy efficiency from specific portions of low grade waste heat sources are described. Configurations and related processing schemes of direct or indirect (or both) inter-plants heating systems synthesized for integrated medium grade crude oil semi-conversion refineries and aromatics complex for increasing energy efficiency from specific portions of low grade waste sources are also described.

Configurations and related processing schemes of direct or indirect inter-plants heating systems (or both) synthesized for grassroots medium grade crude oil semi-conversion refineries to increase energy efficiency from specific portions of low grade waste heat sources are described. Configurations and related processing schemes of direct or indirect inter-plants heating systems (or both) synthesized for integrated medium grade crude oil semi-conversion refineries and aromatics complex for increasing energy efficiency from specific portions of low grade waste sources are also described.

Systems and processes for treating acid gas from a sour gas stream are provided. A chemical looping combustion (CLC) process is provided that uses CaCO.sub.3 to capture sulfur from the acid gas and produce CaSO.sub.4. An acid gas treatment unit may receive an acid gas from an acid gas removal unit and produce the CaSO.sub.4 and various gas and air streams for use in heat exchangers for steam production. The acid gas treatment unit may include a fuel reactor, an oxidizer reactor, and a calciner reactor. Another acid gas treatment unit may include a fuel reactor that includes the calciner function and an oxidizer reactor. A selective membrane module may be disposed between the sour gas stream and an acid gas removal unit to produce a H.sub.2S and CO.sub.2 permeate that is mixed with the acid gas stream provided to the acid gas treatment unit.

Systems and processes for treating acid gas from a sour gas stream are provided. A chemical looping combustion (CLC) process is provided that uses CaCO.sub.3 to capture sulfur from the acid gas and produce CaSO.sub.4. An acid gas treatment unit may receive an acid gas from an acid gas removal unit and produce the CaSO.sub.4 and various gas and air streams for use in heat exchangers for steam production. The acid gas treatment unit may include a fuel reactor, an oxidizer reactor, and a calciner reactor. Another acid gas treatment unit may include a fuel reactor that includes the calciner function and an oxidizer reactor. A selective membrane module may be disposed between the sour gas stream and an acid gas removal unit to produce a H.sub.2S and CO.sub.2 permeate that is mixed with the acid gas stream provided to the acid gas treatment unit.

Apparatus and methods for denitrification and desulfurization of and dust removal from an FCC tail gas by an ammonia-based process. The apparatus may include a first-stage waste heat recovery system, a denitrification system, a dust removal and desulfurization system, a tail gas exhaust system, and an ammonium sulfate post-processing system. The dust removal and desulfurization system may include a dedusting tower and an absorption tower disposed separately. The top and the bottom of the absorption tower may be connected respectively to the tail gas exhaust system and the ammonium sulfate post-processing system. The absorption tower may include sequentially, from bottom to top, an oxidation section, an absorption section, and a fine particulate control section. The methods may be implemented with the apparatus.

Apparatus and methods for denitrification and desulfurization of and dust removal from an FCC tail gas by an ammonia-based process. The apparatus may include a first-stage waste heat recovery system, a denitrification system, a dust removal and desulfurization system, a tail gas exhaust system, and an ammonium sulfate post-processing system. The dust removal and desulfurization system may include a dedusting tower and an absorption tower disposed separately. The top and the bottom of the absorption tower may be connected respectively to the tail gas exhaust system and the ammonium sulfate post-processing system. The absorption tower may include sequentially, from bottom to top, an oxidation section, an absorption section, and a fine particulate control section. The methods may be implemented with the apparatus.

Certain aspects of natural gas liquid fractionation plant waste heat conversion to simultaneous power and cooling capacities using modified Goswami system can be implemented as a system. The system includes a waste heat recovery heat exchanger configured to heat a buffer fluid stream by exchange with a heat source in a natural gas liquid fractionation plant. The system includes a modified Goswami cycle energy conversion system including one or more first energy conversion system heat exchangers configured to heat a working fluid by exchange with the heated buffer fluid stream, a separator configured to receive the heated working fluid and to output a vapor stream of the working fluid and the liquid stream of the working fluid, a turbine and a generator, wherein the turbine and generator are configured to generate power by expansion of a first portion of the vapor stream of the working fluid, and a cooling subsystem including a cooling element configured to cool a process fluid stream from the natural gas liquid fractionation plant by exchange with a condensed second portion of the vapor stream of the working fluid.

The present invention relates to an exhaust gas purifying and heat recovering system and method for sludge treatment. The system comprises: a first heat exchange flow path including a first heat exchanger, and a second heat exchanger and a third heat exchanger arranged downstream of the first heat exchanger, a first heat exchange medium is circulated in the first heat exchange flow path, to heat process gas for sludge treatment in the first heat exchanger; a second purification and heat exchange flow path including a heat exchange tank containing a second liquid heat exchange medium, the exhaust gas after sludge treatment is discharged into the heat exchange tank; and a third dirty liquid separation flow path including a dirty liquid separation tank provided between a dirty of the heat exchange tank and a clean liquid inlet of the heat exchange tank, for separating the dirty liquid after purging the exhaust gas, and the separated liquid is again directed to the clean liquid inlet of the heat exchange tank.