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Machine translation
1. (WO1981003695) METHOD AND EQUIPMENT FOR THE ENERGY-SAVING DRYING ESPECIALLY OF HEAT-SENSITIVE AS WELL AS OF TOXIC AND/OR SMELLY GAS PRODUCING MATERIALS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/003695    International Application No.:    PCT/HU1981/000025
Publication Date: 24.12.1981 International Filing Date: 11.06.1981
IPC:
C02F 11/12 (2006.01), F26B 21/08 (2006.01), F26B 23/00 (2006.01)
Applicants:
Inventors:
Priority Data:
1518/80 18.06.1980 HU
Title (EN) METHOD AND EQUIPMENT FOR THE ENERGY-SAVING DRYING ESPECIALLY OF HEAT-SENSITIVE AS WELL AS OF TOXIC AND/OR SMELLY GAS PRODUCING MATERIALS
(FR) PROCEDE ET INSTALLATION DE SECHAGE A ECONOMIE D"ENERGIE SPECIALEMENT POUR DES MATERIAUX SENSIBLES A LA CHALEUR AINSI QUE DES MATERIAUX DEGAGEANT DES GAZ TOXIQUES ET/OU MALODORANTS
Abstract: front page image
(EN)In course of the process air or a gaseous medium is used in an open or in a closed system, by the aid of which the moisture content of the material to be dried is extracted. The drying medium is brought into contact with the humidity absorbing solution in the absorber; between the steam having been obtained in such a manner and the drying medium heat exchange is taking place; the steam is condensed, the drying medium is heated, at last the condensate is discharged into the atmosphere, while the heated drying medium is recirculated in the drying process. In case, if sludge has to be dried and to be annihilated, the sludge - having been pre-condensed to a solid matter content of 30% - is dried to the moisture content of 1- 2% by means of the drying medium, hereafter - in a given case by using an auxiliary firing - the sludge is burnt in the combustion space of the expeller. The equipment provided with an open or closed drier operating with a heated drying medium, incorporates an absorber having been arranged in the path of the stream of the drying medium. In the absorber there is a liquid distributor introducing the humidity absorbing solution. Furthermore the equipment comprises an expeller for the removal of the humidity content of the humidity absorbing solution and the steam space of said expeller is connected to the heat exchanger arranged in the stream path of the drying medium leaving the absorber, while the liquid space is connected to the liquid distributor. When the sludge is to be dried and burnt, the equipment comprises a sludge drier, which is connected to the firing chamber of the furnace through the drying line for the dried sludge.
(FR)Dans ce procede on utilise de l"air ou un milieu gazeux dans un systeme ouvert ou ferme a l"aide duquel l"humidite du materiau a secher est extraite. Le milieu de sechage est amene au contact de la solution d"absorption d"humidite dans le dispositif d"absorption; un echange de chaleur a lieu entre la vapeur obtenue et le milieu de sechage; la vapeur est condensee, le milieu de chauffage est chauffe, et finalement le condensat est decharge dans l"atmosphere, tandis que le milieu de sechage chauffe est recircule dans le systeme de sechage. Si de la boue doit etre sechee et reduite, la boue - ayant ete precondensee jusqu"a obtenir une concentration en solides de 30% - est sechee jusqu"a obtenir la concentration d"humidite de 1 a 2% a l"aide du milieu de sechage, apres quoi - en utilisant par exemple un systeme de brulage auxiliaire - la boue est brulee dans l"espace de combustion du dispositif d"expulsion. L"installation pourvue d"un systeme de sechage ouvert ou ferme fonctionnant avec un milieu de sechage chauffe, comprend un dispositif d"absorption dispose dans le passage du flux du milieu de sechage. Dans le dispositif d"absorption se trouve un distributeur de liquide introduisant la solution d"absorption d"humidite. De plus, l"installation comprend un dispositif d"expulsion pour enlever l"humidite de la solution d"absorption d"humidite et l"espace de vapeur du dispositif d"expulsion est connecte a l"echangeur de chaleur dispose dans le passage du flux du milieu de sechage sortant du dispositif d"absorption, tandis que l"espace de liquide est connecte au distributeur de liquide. Lorsque la boue doit etre sechee et brulee, l"installation comprend une secheuse de boues, qui est connectee a la chambre de combustion du four par l"intermediaire de la conduite de sechage pour la boue sechee.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)