BE522082A

BE522082A -

Info

Publication number: BE522082A
Authority: BE

Description

       

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  PROCEDE POUR DISTILLER A BASSE TEMPERATURE OU DEGAZER LE CHARBON. (Inventeur k.   Schaff).   



   L'invention concerne un procédé de distillation lente ou de   déga-   zage du charbon dans   un   faisceau tubulaire faisant partie d'une chaudière à vapeur et au travers duquel le charbon à traiter   est/transporté   par voie pneu-   matique,  par exemple au moyen d'air,de gaz brulés,de gaz de distillation d'oxygène ou de vapeur d'eau, ce faisceau tubulaire étant disposé de préférence dans un avant-corps de chaudière   dans   lequel les gaz brûlés de la chaudière entrent avec une température de 1000 C à 800 C. 



   Une telle installation fonctionne surtout avantageusement   dans le   cas où la chaudière marche sous charge constante et aussi lorsque 1'installation de distillation et de dégazage placée dans le circuit des gaz de fumées de la chaudière jouit de conditions de travail et de rapports transmissifs de chaleur   réguliers.   



   Pour obtenir des conditions de travail optima pour 1'installation de distillation et de dégazage meme dans le cas de charges partielles d'une chaudière et de rapports de charge très variables   l'invention   en conformité avec le brevet N  513.538 prévoit de réaliser le procédé visé de façon   que le   faisceau tubulaire servant à la distillation et au dégazage est logé dans une chambre spécialement chauffée, comme par exemple dans une chambre de précombustion de la chaudière,dont les gaz brûlés sont mélangés, en un endroit   convena-   ble dépendant des températures des gaz de fumées de la chaudière principale., aux gaz de fumées de celle-ci.

   Les parois de la chambre de précombustion peuvent être refroidies suivant les nécessités par le système des tubes   d'eau   de la chaudièrela chambre de précombustion devenant alors une partie de la chaudière en vue de la production de   vapeur.   



   Grâce à un tel procédé et à une telle   disposition..   il est possible de conduire le feu de la chambre de précombustion indépendamment de la marche de la chaudière et de   l'adapter   à la masse de charbon à distiller ou à dégazer transportée pneumatiquement au travers du faisceau tubulaire 

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  PROCESS FOR DISTILLING AT LOW TEMPERATURE OR DEGAZING COAL. (Inventor k. Schaff).



   The invention relates to a process for the slow distillation or degassing of coal in a tube bundle forming part of a steam boiler and through which the coal to be treated is / conveyed pneumatically, for example by means of air, burnt gas, oxygen distillation gas or water vapor, this tube bundle preferably being arranged in a boiler fore-body in which the burnt gases from the boiler enter with a temperature of 1000 C at 800 C.



   Such an installation works especially advantageously in the case where the boiler operates under constant load and also when the distillation and degassing installation placed in the flue gas circuit of the boiler enjoys working conditions and regular heat transmissive ratios. .



   In order to obtain optimum working conditions for the distillation and degassing installation even in the case of partial loads of a boiler and very variable load ratios, the invention in accordance with patent N 513,538 provides for carrying out the intended process. so that the tube bundle used for distillation and degassing is housed in a specially heated chamber, such as for example in a pre-combustion chamber of the boiler, in which the flue gases are mixed, in a suitable location depending on the temperatures of the flue gas from the main boiler., to the flue gas from the latter.

   The walls of the precombustion chamber can be cooled as required by the boiler water tube system with the precombustion chamber then becoming part of the boiler for the production of steam.



   Thanks to such a method and such an arrangement .. it is possible to conduct the fire of the pre-combustion chamber independently of the operation of the boiler and to adapt it to the mass of coal to be distilled or to be degassed transported pneumatically through it. tube bundle

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Claims

As fuel for the pre-combustion chamber and the main boiler, it is possible to use the partially or fully degassed fuel in the degassing plant of the pre-combustion chamber, or also to burn non-degassed fuel or a mixture of combustion. oustible not degassed and fuel partially or totally degassed., The burners of the precombustion chamber can also be placed in such a way that the flue gases from the precombustion chamber also flow in the opposite direction to that of the fuel to be distilled or degased transported pneumatically through the supply pipe. For the pneumatic transport of the coal in the tubes of the pre-combustion chamber, it is possible to use instead of inert gases,

such as for example flue gas .. condensable vapors. preferably steam or distillation and degassing gas, and then it may also be advantageous to work with an addition of oxygen The drawing appended to this specification is intended to facilitate understanding of the invention, of which it represents an exemplary embodiment. In Figure 1 is shown schematically the form of construction given by way of example for the performance of the process. In this construction, in the foreground of the main boiler 1 is arranged the distinctly heated secondary chamber or the pre-chamber. combustion 2,

which is connected to the main boiler by the flue gas pipe 3 and the walls of which are heated simultaneously by the tubular system 4 of the main boiler. In the pre-combustion chamber 2 is placed the degassing apparatus 5 for distillation or degassing; it has the shape of a tube bundle, which is equipped with a common fuel loading device 6. The fuel to be distilled or degassed is brought to this loading device 6 from the storage hopper 7, which can also simultaneously supply the fuel to the burner 8 of the precombustion chamber 2, or to the burner 9 of the main boiler.

The distilled or degassed fuel is separated from the gas in a separator 10 and led into an intermediate hopper 11, from where the fuel, depending on the case, can be sent to the burners 8 or 9 or to both simultaneously The gas separated in the separator 10 can be sent through line 12 to a gas cleaning plant, from where the remaining fuel which is still separated there can also be sent into the intermediate hopper 11 or through the burners 8 and 9 directly into the hearth If the still or degassing device has to be taken out of service,

the burners 8 are then dismantled and the main boiler is operated without a pre-combustion chamber 2o After leaving the tube bundle 5, the partially degassed fuel can also be brought through a pipe 13 into an apparatus in which the degassing of the residue is carried out at by means of another system, such as for example by means of heat transmission bodies brought especially to high temperature CLAIMS theProcess for the slow distillation and the degassing of coal in a steam boiler, characterized in that the bundle (s) tubes used for distillation or degassing are placed in a boiler chamber (pre-combustion chamber) heated separately,

in which the burnt gases are mixed with the flue gas from the boiler in a suitable location and in that, as far as required, the walls of the precombustion chamber are cooled by the tube bundle of the boiler 2. Method according to claim 1, characterized in that the fire duct of the precombustion chamber is adapted, independently of the flow rate of the boiler, to the mass of fuel to be distilled or to be degassed transported by the tube bundle.

3. Method according to claims 1 and 2, characterized in that <Desc / Clms Page number 3> not only the hearth of the precombustion chamber, but also that of the main boiler, are supplied at will with partially or totally degassed fuel or with non-degassed fuel or both at the same time.

4. Method according to claims 1 to 3, characterized in that the flue gases from the pre-combustion chamber circulate in countercurrent with respect to the fuel transported pneumatically through the degassing installation.

5Procédé according to claims 1 to 4, characterized in that condensable vapors are preferably used for the pneumatic transport of the fuel to be degassed, preferably water vapor, instead of inert gases. 6. Method according to claims 1 to 5, characterized in that for the pneumatic transport of the coal by the degassing tubes is preferably used distillation and degassing gases. 7.

Process according to Claims 1 to 6, characterized in that a certain quantity of oxygen is added to the gas serving for the pneumatic transport 8.Construction of a boiler for carrying out the process according to claims la ?? characterized by a boiler chamber comprising burners and conduits for transporting coal, so as to form an installation distinct from the usual boiler hearth.