Die Erfindung betrifft ein Verfahren zur Reinigung von Gasen, bei dem ein Rohgas (1) durch Kondensieren und/oder Ausfrieren von Verunreinigungen zu einem Reingas (2) gereinigt wird mit Hilfe eines ersten Kuhlmittelstroms (3) in mindestens einem ersten Warmetauscher (4), wobei der erste Kuhlmittelstrom (3) in dem ersten Warmetauscher (4) getrennt vom Rohgas (1) gefuhrt wird und der erwarmte erste Kuhlmittelstrom (3) nach Verlassen des ersten Warmetauschers (4) zumindest teilweise in einem Kreislauf (5) dem ersten Warmetauscher (4) wieder zugefuhrt wird, wobei das Reingas (2) zumindest teilweise dem ersten Kuhlmittelstrom (3) zugefuhrt wird, sowie eine Vorrichtung zur Durchfuhrung dieses Verfahrens. Die Erfindung zeichnet sich durch eine hohe Wirtschaftlichkeit bei einem vergleichsweise einfachen apparativen Aufbau aus, wobei Abtauprobleme vermieden werden.

Verfahren und Vorrichtung zur Reinigung von Gasen mit Wärmetauschern

Purifying a gas stream by condensing and/or freezing out impurities by passing the gas stream successively through two heat exchangers in thermal contact with a coolant comprises heating the coolant before supplying it to the first heat exchanger. An independent claim is also included for apparatus for purifying gases, comprising a first heat exchanger (2) with a gas inlet (4), a gas outlet (5), a coolant inlet (17) and a coolant outlet (18), a second heat exchanger (3) with a gas inlet (6), a gas outlet (7), a coolant inlet (13) and a coolant outlet (14), and a heater (25) for the coolant supply to the first heat exchanger and/or a heater (27) for the gas stream leaving the first heat exchanger.

Method and apparatus for partial condensation which is poor in aerosols

Apparatus for purifying an impurity-laden gas stream comprises a condenser (2) with a dew point zone (14) in which the impurity condenses or freezes, with an inlet (3) and outlet (4) for the gas stream, an inlet (5) and outlet (6) for coolant, and a system for removing the condensed or frozen impurity from the condenser. An independent claim is also included for purifying an impurity-laden gas stream by heat exchange with a coolant in apparatus as above.

Apparatus for purifying an impurity-laden gas stream comprises a condenser with a dew point zone in which the impurity condenses or freezes and a system for removing the condensed or frozen impurity from the condenser

This invention relates to a method of refrigeration purification and power generation of industrial gas and apparatus therefor. The apparatus is comprised of two parts, the front part of which is constituted by a multi-stage phase changeable refrigeration cycle of pure-phase changeable non-heat refrigeration technique for effectively obtaining cool quantity; the rear part of which makes use of the feature that the toxic and harmful gas in the waste gas has the higher boiling point than clean gas, the waste gas is firstly condensed and liquefied to be separated; the liquefied clean gas and the liquid refrigeration medium of the last stage absorb heat from waste gas in order to be evaporated into steam to drive expansion turbine groups respectively to work, while collecting a mechanical power in a negative compression region and adding a mechanical energy loss of initial cooled waste gas during compression. The invention can thoroughly remedy the effect of the industrial waste gas on polluting the atmosphere and effectively generate power.

Method of refrigeration purification and power generation of industrial waste gas and the apparatus therefor

Partial condensation of a substance from a gas stream by heat exchange with a refrigerant in a cryocondenser comprises heating and/or evaporating the refrigerant by thermal contact with a heat transfer medium before supplying the refrigerant to the cryocondenser. An independent claim is also included for apparatus for partial condensation of a substance from a gas stream by heat exchange with a refrigerant, comprising a cryocondenser (2) with a gas supply line (5), a gas discharge line (6), a refrigerant supply line (7) and a refrigerant discharge line (8), where the refrigerant supply line is in thermal communication with a heat transfer medium supply line at the heat exchange surfaces of a refrigerant heat exchanger (3).

Process and device for partial condensation

Verfahren und Vorrichtung zur Abgasreinigung mit Wärmetauschern

This procedure cleans a waste gas containing e.g. methyl chloride. It is passed through a heat exchanger (1), hence condensing or freezing-out the vaporised and/or gaseous impurities e.g. VOCs, pref. in indirect counter current heat exchange with a cooling medium. In this novel process, the now precleaned gas is supplied for further freezing out and/or condensation, to a second heat exchanger (3) such that it passes the heat exchange surfaces in upward flow. Also claimed are single- and combined heat exchangers with appropriate inlet and outlet connections for use in the process described.

Ulrich Thorwarth

Papers

Verfahren und Vorrichtung zur Abgasreinigung mit Wärmetauschern

Process and apparatus for waste gas cleaning using heat exchangers