The invention concerns a process for operating a fired furnace which is heated using a fuel gas stream and forming a combustion product stream, wherein heat of at least part of the combustion product stream is used in forming a steam stream. It is provided that at least a part of the steam stream is subjected to a high-temperature electrolysis to form a hydrogen-containing and an oxygen-containing material stream, and that at least a part of the hydrogen-containing material stream is used as the fuel gas stream. A corresponding arrangement is also the subject of the invention.

The invention concerns a process for operating a fired furnace which is heated using a fuel gas stream and forming a combustion product stream, wherein heat of at least part of the combustion product stream is used in forming a steam stream. It is provided that at least a part of the steam stream is subjected to a high-temperature electrolysis to form a hydrogen-containing and an oxygen-containing material stream, and that at least a part of the hydrogen-containing material stream is used as the fuel gas stream. A corresponding arrangement is also the subject of the invention.

A total heat energy recovery system for furnace-process phosphoric acid is disclosed by the present disclosure. The system comprises a phosphorus burning tower, a hydration tower, an absorption tower, a Venturi tube, a demister, an induced draft fan, a deaerator, an economizer, a dilute acid circulating tank, a phosphoric acid pump, and a feedwater pump. In consideration of the whole process system, fresh soft water is deoxidized after being heated by an upper head of the phosphorus burning tower and a gas guide tube, and the deoxidized water is then pumped into the economizer by a high-pressure pump to recover the heat of the hydration tower and then enters a steam pocket of the phosphorus burning tower to generate medium-high pressure steam. Therefore, unified recovery of the heat of a furnace-process phosphoric acid device is achieved, the medium-high pressure steam is generated, the effective energy is improved.

A total heat energy recovery system for furnace-process phosphoric acid is disclosed by the present disclosure. The system comprises a phosphorus burning tower, a hydration tower, an absorption tower, a Venturi tube, a demister, an induced draft fan, a deaerator, an economizer, a dilute acid circulating tank, a phosphoric acid pump, and a feedwater pump. In consideration of the whole process system, fresh soft water is deoxidized after being heated by an upper head of the phosphorus burning tower and a gas guide tube, and the deoxidized water is then pumped into the economizer by a high-pressure pump to recover the heat of the hydration tower and then enters a steam pocket of the phosphorus burning tower to generate medium-high pressure steam. Therefore, unified recovery of the heat of a furnace-process phosphoric acid device is achieved, the medium-high pressure steam is generated, the effective energy is improved.

A furnace system includes a regenerative furnace with a melting tank and first and second regenerators. In a forward operating mode, combustion air enters and travels through the first regenerator before exiting the first regenerator into the melting tank while exhaust fluids exit the melting tank into the second regenerator and travels through the second regenerator before exiting the second regenerator. In a reverse operating mode, the flow is reversed. The system also includes a preheater for preheating materials supplied to the melting tank. Portions of the combustion air traveling through the first regenerator in the forward operating mode and the second regenerator in the reverse operating mode are diverted before entering the melting tank and mixed with fluids exhausted from the fluid outlet of the preheater for delivery to the fluid inlet of the preheater.

A high-speed jet and radiation combined heating device and a rapid heating method thereof. The device comprises: a heat-preservation box body (1) a circulating fan (2); a buffering chamber (3); two jet bellows (4); a plurality of rows of jet high-speed nozzles (5); and a plurality of radiation tubes (6). A high-speed jet heating technology and a radiation tube (6) heating technology are combined to achieve a high heating rate, and to bring the advantages of good heating uniformity and so on of high-speed jet heating into full play, thus greatly accelerating the heating rate and improving the heat efficiency of steel strip.

A high-speed jet and radiation combined heating device and a rapid heating method thereof. The device comprises: a heat-preservation box body (1) a circulating fan (2); a buffering chamber (3); two jet bellows (4); a plurality of rows of jet high-speed nozzles (5); and a plurality of radiation tubes (6). A high-speed jet heating technology and a radiation tube (6) heating technology are combined to achieve a high heating rate, and to bring the advantages of good heating uniformity and so on of high-speed jet heating into full play, thus greatly accelerating the heating rate and improving the heat efficiency of steel strip.

A method for heating a furnace including radiant tubes and being able to thermally treat a running steel strip including the steps of: i. supplying at least one of the radiant tubes with H.sub.2 and O.sub.2 such that the H.sub.2 and the O.sub.2 get combined into heat and steam, ii. recovering the steam from the at least one of the radiant tubes, iii. electrolysing the steam to produce H.sub.2 and O.sub.2, and iv. supplying at least one of the radiant tubes with the H2 and O2 produced in step iii, such that they get combined into heat and steam.

A method for heating a furnace including radiant tubes and being able to thermally treat a running steel strip including the steps of: i. supplying at least one of the radiant tubes with H.sub.2 and O.sub.2 such that the H.sub.2 and the O.sub.2 get combined into heat and steam, ii. recovering the steam from the at least one of the radiant tubes, iii. electrolysing the steam to produce H.sub.2 and O.sub.2, and iv. supplying at least one of the radiant tubes with the H2 and O2 produced in step iii, such that they get combined into heat and steam.