Patent DE-102008047283-A1 (DE)
Title: Steam generation plant for the regeneration of activated carbon filter of industrial exhaust air cleaning units that are used in gravure print shops for cleaning exhaust air of toluene, comprises a steam storage, and a cooling tower
Inventor: HUEBNER JAN
IPC: B01J20/34
Filed: 2008-09-16
Abstract: The steam generation plant for the regeneration of activated carbon filter of industrial exhaust air cleaning unit (5), comprises a steam storage (15) and a cooling tower. The exhaust air cleaning unit is equipped with a steam inlet and steam outlet that enables flushing of activated carbon filter with steam. The steam producer is coupled for additional heating of industrial building and for the provision of steam and warm water for further production step over steam storage to heating network and further steam-/warm water consumer of production site. The steam generation plant for the regeneration of activated carbon filter of industrial exhaust air cleaning unit (5), comprises a steam storage (15) and a cooling tower. The exhaust air cleaning unit is equipped with a steam inlet and steam outlet that enables flushing of activated carbon filter with steam. The steam producer is coupled for additional heating of industrial building and for the provision of steam and warm water for further production step over steam storage to heating network and further steam-/warm water consumer of production site. A first steam storage exists itself between the outlet of a steam generator (1) and the inlet of the exhaust air cleaning unit. A steam economizer is existed from a forced-flow evaporator or a falling film evaporator (4) that is equipped with an inlet for feed water and an outlet for the steam, and/or inlet and outlet for desorbate emerging from the exhaust air cleaning unit, from a vent condenser implemented as a steam-jet condenser that possesses an inlet and outlet for process steam and a suction line. The desorbate inlet of the evaporator is connected with the outlet of the exhaust air cleaning unit, the steam outlet of the evaporator is connected with the suction line, the process steam inlet of the steam-jet condenser is connected with the steam generator, and the process steam outlet is connected with the inlet of the exhaust air cleaning unit. A heat recovery system is integrated over a heat exchanger (10) that possesses inlet and outlet for the desorbate and for water, over a second steam storage having an inlet for aqueous water and a steam outlet, and over the vent condenser. The desorbate inlet of the heat exchanger is connected with the desorbate outlet of the evaporator, the water inlet of the heat exchanger is connected with the water inlet of the steam storage, the water outlet of the heat exchanger is connected with the outlet of the steam storage, the suction side of the vent condenser is connected with the steam outlet of the steam storage and the pressure side of the vent condenser is connected with the inlet of the first steam storage. A condensation unit for the desorbate is existed from a heat exchanger for the condensation of the desorbate, where the heat exchanger disposes over an inlet and/or outlet for the desorbate and for cool water, from the cooling tower with a return and a feed, and from a cool water collection container that possesses inlet and/or outlet for cool water and for reverse cooling over an evaporator circuit of heat pump. The heat pump is connected with the inlet and outlet of the evaporator circuit for further process stage. The desorbate inlet of the heat exchanger is connected with the desorbate outlet of the heat exchanger, the desorbate outlet of the heat exchanger is connected with a solvent separator, the cool water inlet of the cool water collection chamber is connected with the cool water outlet of the heat exchanger, the cool water outlet of the cool water collection chamber is connected with the cool water inlet of the heat exchanger, the evaporator circuit inlet of the cool water collection chamber is connected with the evaporator circuit outlet of the heat pump and the evaporator circuit outlet of the cool water collection chamber is connected with the evaporator circuit inlet of the heat pump. The cool water inlet of the heat exchanger is connected with the return of the cooling drum and the cool water outlet of the heat exchanger is connected with the feed of the cooling drum by valves. A gas turbine for steam generation is arranged between the outlet of the steam generator and the first steam storage and/or between the outlet of the steam generator and the third steam storage. The vent condenser is constructed in multi-stage and controls over intermediate cooling through injection. An independent claim is included for a method for steam generation for the regeneration of activated carbon filter of industrial exhaust air cleaning units.