Method for drying a humid polymer powder and device suitable for said method
AssigneesThyssenkrupp Uhde GmbH, Vinnolit GmbH & Co. KG
InventorsMichael Benje, Peter Kammerhofer
Life of this patent
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Abstract
An apparatus (1) and method for drying polymer powders is described. The apparatus has an inlet (2) and an outlet (3) for the polymer powder, heat registers (5) installed in the interior space (4) and lines (7) for a heated gas (6a) for drying the polymer powder. The lines open into the interior space (4) and are connected to heat exchangers (9) for heating gas (6). The heat exchangers (9) are connected to a plant for the preparation of 1,2-dichloroethane (15) and/or for the preparation of vinyl chloride from 1,2-dichloroethane so that thermal energy from the plant can be utilized for heating the gas (6). The method comprises treatment of a polymer powder with a heated gas (6a) in the drying apparatus (1).
Claims13
A method of drying polymer powders in a drying apparatus (1), which comprises the steps:
- i) treatment of the polymer powder with a heated gas (6a) in the drying apparatus (1) equipped with an inlet (2) and an outlet (3) for the polymer powder and with heat registers (5) installed in an interior space (4) of the drying apparatus (1),
- ii) introduction of the heated gas (6a) through lines (7) into the interior space (4),
- iii) heating of the gas (6) in heat exchangers (9) for producing heated gas (6a), wherein
- iv) the heating of the heat exchangers (9) for producing heated gas is effected by means of hot liquid 1,2-dichloroethane (19) which has been heated by means of thermal energy which originates from a plant for preparation of 1,2-dichloroethane (15), and
- v) wherein hot water (5a) which has been heated in a heat exchanger (13) for heating water, for which heat is derived from 1,2-dichloroethane vapor (14) which has been heated by means of thermal energy which originates from the plant for the preparation of 1,2-dichloroethane (15), flows through the heat registers (5).
An apparatus (1) for drying polymer powders, which has an inlet (2) and an outlet (3) for the polymer powder and heat registers (5) installed in an interior space (4) of the drying apparatus (1) and lines (7) for a heated gas (6a) for drying the polymer powder, which lines open into the interior space (4),
- wherein the lines (7) are connected to heat exchangers (9) for heating gas (6) and the heat exchangers (9) for heating gas are connected to a plant for preparation of 1,2-dichloroethane (15) so that hot liquid 1,2-dichloroethane (19) which has been heated by means of thermal energy from the plant for the preparation of 1,2-dichloroethane (15) can be utilized for heating the gas (6),
- wherein hot water (5a) is passed through the heat registers (5) which are connected to a heat exchanger (13) for heating water flowing through the heat registers (5) and the heat exchanger (13) for heating water is additionally connected via line (14) to the plant for the preparation of 1,2-dichloroethane (15), in which 1,2-dichloroethane vapor (14), which has been heated by means of thermal energy which originates from the plant for the preparation of 1,2-dichloroethane (15), is introduced and discharged through the heat exchanger (13) for heating water.
Dependencies are inferred from the claim text.