Dryer for Drying Dry Materials, Especially Textiles

Abstract

A dryer for drying dry materials having heating and cooling chambers, wherein the two chambers are sealed gas-tight to each other and/or to the outside environment, a connecting line that fluidically connects the chambers to each other and has a closing valve, a vacuum pump that is actively connected to the cooling chamber, a heat pump that is actively connected to the two chambers, and a steam generator which feeds generated steam via a steam line into the heating chamber,
The steam mixes with moisture of the dry materials in the heating chamber and the resulting moist steam is supplied to the cooling chamber via the connecting line, wherein positive pressure is generated through evaporation and negative pressure is produced through the condensation such that a pressure difference is produced between the heating and cooling chambers, and wherein the vacuum pump pumps dry air from the cooling chamber as required.

Claims

1. A dryer for drying dry materials, especially textiles, said dryer comprising: a heating chamber, in which dry materials to be dried are to be arranged, and a cooling chamber, wherein the heating chamber and the cooling chamber are configured to be sealed gas-tight to each other and/or to the outside environment, a connecting line that fluidically connects the chambers to each other and has a closing valve, a vacuum pump that is actively connected to the cooling chamber, a heat pump configured to be actively connected to the two chambers, a steam generator which feeds generated steam via a steam line into the heating chamber, wherein the steam supplied by the steam generator mixes with moisture of the dry materials in the heating chamber and the resulting moist steam is configured to be supplied to the cooling chamber via the connecting line, wherein positive pressure is configured to be generated through the evaporation of the moisture in the heating chamber, wherein negative pressure is configured to be produced through the condensation of the moisture in the cooling chamber such that a pressure difference is configured to be produced between the heating chamber and the cooling chamber, and wherein the vacuum pump is configured for pumping dry air out of the cooling chamber as required.

2. The dryer for drying according to claim 1, wherein the heat pump is connected to the cooling chamber via a cold line and to a hot water tank via a heat line into which the heat line feeds heated water, wherein the steam generator is connected to the hot water tank via an extraction line and uses the heated water from the hot water tank to generate steam.

3. The dryer for drying according to claim 2, wherein a condensate line is provided between the cooling chamber and the hot water tank, via which condensate is configured to be fed from the cooling chamber into the water tank.

4. A process for drying materials to be dried with a dryer according to claim 1, wherein the materials to be dried are stored in the heating chamber, evaporation of the moisture in the materials to be dried takes place in the heating chamber, condensation of the steam takes place in the cooling chamber which is connected to the heating chamber via a connecting line and can be sealed gas-tight to the heating chamber, positive pressure is generated through the evaporation of the moisture in the heating chamber, negative pressure is created through the condensation of the moisture in the cooling chamber so that a pressure difference is created between the heating chamber and the cooling chamber, and the dry and cool air produced through the condensation of the steam in the cooling chamber is pumped out with a vacuum pump connected to the cooling chamber, wherein the heat enthalpy necessary to evaporate the moisture in the dry materials is supplied by a steam generator and a heat pump connected to a heating chamber and a cooling chamber.

5. The process according to claim 4, wherein hot water generated by the heat pump is fed into a water tank, wherein the steam generator takes heated water from the hot water tank via an extraction line, generates steam therefrom and feeds steam into the heating chamber via a steam line.

6. The process according to claim 5, wherein condensate from the cooling chamber is configured to be fed into the water tank via a condensate line arranged between the cooling chamber and the hot water tank.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0060] The claimed drying process and the dryer according to the disclosure are described by means of an embodiment example below. The FIGURE at the end shows a simplified illustration of a dryer according to the disclosure.

DETAILED DESCRIPTION OF THE DRAWING

[0061] The FIGURE shows a dryer 20 for dying dry materials, especially textiles. A heating chamber 22 and a cooling chamber 24, which can be sealed gas-tight to each other and/or to the outside environment, are arranged next to one other in the shown embodiment and are fluidically connected to each other via a connecting line 26. A closing valve 28 is arranged in the connecting line 26 and can be used to seal the connecting line 26.

[0062] In the embodiment shown, a vacuum pump 30 is connected to the cooling chamber 24 via a vacuum line 32. The vacuum pump 30 also has an ambient line 34 through which air or positive pressure can be released into the environment.

[0063] A heat pump 36, which can be actively connected to the two chambers 22 and 24, which may for example comprise a condenser and an evaporator (not shown), is connected to the cooling chamber 24 via a cold line 38. Furthermore, the heat pump 36 is connected via a heat line 40 to a hot water tank 42 into which it feeds heated water.

[0064] A steam generator 44 is connected to the hot water tank 42 via an extraction line 46. Furthermore, the steam generator 44 is connected to the heating chamber 22 via a steam line 48. The steam generator 44 uses the water from the hot water tank 42 to generate steam, which is fed into the heating chamber 22 via the steam line 48 to dry the dry materials. Closing valves 28 are also arranged in the extraction line 46 and the steam line 48.

[0065] Furthermore, a water pump 50 is provided between the cooling chamber 24 and the hot water tank 42, whose condensate lines 52 can be used to feed condensate from the cooling chamber 24 into the water tank 42.

[0066] The heating chamber 22 is equipped with a pressure sensor 54 and a thermometer 56.

[0067] The disclosure is not limited to the exemplary embodiment shown, but also includes technically useful variations of the underlying disclosure.