EP0026707A1 - Process for treating by drying and/or heating combustible granular and/or pulverulent material, and assembly for carrying out the process - Google Patents

Abstract

Method of treatment by drying and / or heating of granular and / or powdery combustible material and installation for carrying out the method. In an installation of the invention, the exhaust fumes are dusted off by an electrostatic dust collector (24). The partially recycled fumes are shared between direct recycling via line (3) and derivative recycling through the dust collector (2) and a line (7) so that the dust collector is traversed in all circumstances by a flow of smoke constant. The dust collected by the dust collector is trapped in a hot hydrocarbon liquid (60) which is used as an auxiliary hydrocarbon binder.

Description

Method of treatment by drying and / or heating of granular and / or powdery combustible material and installation for carrying out the method.

The invention relates to a process and an installation for treatment by drying and / or heating by fluidization and / or gaseous entrainment of a granular and / or pulverulent combustible material, such as a coal to be dried and / or preheated for charging. in coke ovens of low-coking coals by the techniques known as dry charging and preheated charging, or any other application for subsequent physical or chemical treatment.

Processes and installations of the type which the invention proposes to perfect are described, for example, in the published French patent applications Nos 2 207 592, 2 281 971, 2 378 081 and 2 376 201.

The preheating of coal fines involves the use of oxygen-free fumes, and at a temperature not to exceed approximately 500 to 800 ° C. To achieve this result, it has been proposed to recycle in the combustion chamber, where neutral combustion is carried out, part of the fumes used for preheating.

To get the most out of dry or preheated charging, the charcoal particles must be finely ground, for example 80% and even 90% less than 2 mm. These fine particles of coal preheated to 250 ° C are separated from the drive fluid by means of two stages of cyclones, the capture efficiency of which is 98 to 99%.

The smoke treatment system, as recalled, achieves the result but it does not only have advantages. In fact, the non-purified recycled fumes, therefore still charged with fine dust, are introduced, by means of a fan into the combustion chamber, at the level of the burner which operates in stoichiometric combustion therefore at a temperature close to the theoretical temperature. which, for coke oven gas, exceeds 2000 ° C. Fine particles of carbon can burn, or melt, which is not desirable. In known devices, the fumes at the outlet of the cyclones must
be purified before release to the atmosphere.

In a first type, as in the published French patent application No. 2 378 081, a dry dusting is carried out on the exhaust gases only, while in a second type, as in the French patent published 2 207 592, the all of the fumes, recycled or not, are subjected to dry dusting.

Furthermore, when the installation is in standby conditions (for example in the event of an incident upstream or downstream of the preheater) the quantity of smoke discharged into the atmosphere becomes very small, so that, in the case of the first type the final dust collector, placed on the vent pipe, can work at zero or very low flow. If the dust collector is of the wet type, for example high-energy venturi, the reduction in the flow of smoke is not a problem. However, a wet dust collector is inappropriate because the dust collected is advantageously to be introduced into the coke fines. With a dry type dust collector (bag filter and electrostatic precipitator), the reduction in the smoke flow causes condensation and consequently corrosions in the device. In addition, there is a risk that the dust collector will be in a vacuum system, causing parasitic air to enter the installation.

But if you want to install a dry dust collector in a second type installation, it must be sized to handle the maximum smoke flow corresponding to normal operation. As it is not necessary to completely dust off the recycled fumes in the combustion chamber, although this is desirable, it is necessary to provide a very expensive installation adapted to said maximum flow of fumes. Furthermore, when the fumes are dry purified at least before being discharged into the atmosphere, the recovered dust is advantageous to reintroduce in the coal fines, that is to say in the coal undergoing or having undergone the preliminary treatment. But this recovered dust is particles very reactive dries which may ignite immediately on contact with air and fly away very easily. It is therefore necessary to treat them so as to make them inert and easy to handle. They are hardly wettable with water. In addition, humidifying them reduces the advantage of dry dusting. We have already proposed, by the French patent? 1 265 397 to increase the quality of the steel coke obtained from dried coal by adding to the coal, before or after its drying, a hydrocarbon binder, consisting of a coal pitch, an artificial pitch or a bitumen, or an extract or extraction residue, said hydrocarbon binder being added so that it takes a pasty or liquid consistency. Another known advantage of the introduction of a hydrocarbon binder is to reduce the quantity of dust flights when the coal is loaded into the coke oven. It is for the same reason that it has also been proposed, by French patent No. 2,306,252, to add the hydrocarbon binder in one of the transporters of the coal already preheated and this just before it is placed in the oven to reduce the flight dust when loading into the coke oven.

The main object of the invention is to avoid the drawbacks of the two aforementioned types of installations comprising dry dust removal and to propose a new process and a new installation having a dry dust collector that is not overloaded or oversized, and not subject to corrosion. by risk of insufficient flow causing the temperature to drop below the dew point, especially during waiting periods with low heat production in the installation. In other words, it is desired to obtain the optimum dedusting efficiency from the deduster.

Another object of the invention is to propose a solution to the problem of the recovery, handling and re-use of the dust recovered by means of a particular treatment which will be explained.

The objects of the invention are achieved by a method of treatment by drying and / or preheating by entrainment and / or fluidization of a combustible material. granular or powdery, in which the material is dried and / or heated by entrainment and / or fluidization by introducing it into a entrainment and / or fluidization enclosure, where a regime of entrainment and / or fluidization is established at a given temperature by means of a neutral gaseous agent obtained at temperature and in regulated quantities in a combustion chamber, and from which the dried and / or heated material is extracted by pneumatic transport within the effluent gaseous agent, then the said separation is separated material of said gaseous agent effluent by distributing said gaseous agent in regulated quantities between a recycling pipe to the combustion chamber and an outlet for surplus discharge, process in which the surplus gaseous agent is dusted by a dry deduster, by virtue of the fact that a regulated part of the recycled gaseous agent is also dusted dry, at least during the periods of interruption of introduction of the granular or powdery combustible material, and the amount of recycled and dusted gaseous agent is adjusted by imposing a fixed set value on the flow of dusted gas.

In this way the dry dust collector works in all circumstances at a constant gas flow rate and at a suitable temperature, already already regulated by adjusting the burner of the combustion chamber. For each type of dust, there is an optimal efficiency obtained by a corresponding gas passage speed.

The second object is achieved by a process in which an auxiliary hydrocarbon binder is injected in the liquid state into the solid fuel at one of the treatment stages, thanks to the fact that the dust is trapped in a hot carbonated liquid. captured by the dry deduster and using said hot carbonaceous liquid charged with said dust as an auxiliary hydrocarbon binder, at least partial.

According to an advantageous embodiment, said hot carbonated liquid, charged with said dust, is injected into the combustible material after the point of separation from the heat transfer gas having served as a gaseous effluent transport agent.

It is advantageous that the carbonaceous liquid is very mobile and very wetting for dust. To this end, it will advantageously be chosen from the group consisting of hydrocarbons which are more or less liquid at room temperature or after reheating, such as heavy fuel oil, petroleum bitumens. In this way we will obtain a pumpable mixture allowing its incorporation into preheated coal, as indicated above.

• - un dispositif de séchage et/ou chauffage comprenant :
• - une enceinte de séchage et/ou chauffage par entraînement et/ou fluidisation, à la base de laquelle débouche un conduit d'amenée d'un agent gazeux d'entraînement et/ou fluidisation,
• - des moyens d'introduction dans ladite enceinte du matériau à sécher et/ou chauffer,
• - une conduite d'entraînement du matériau séché et/ou chauffé,
• - des moyens de séparation du matériau granuleux ou pulvérulent d'avec l'agent gazeux de fluidisation,
• - une chambre de combustion pour la production de l'agent gazeux d'entraînement et/ou de fluidisation dirigé vers le conduit d'amenée à ladite enceinte, ladite chambre de combustion comportant au moins un brûleur pouvant fonctionner dans une plage de puissance donnée,
• - des moyens de régulation du combustible liquide ou gazeux amené au brûleur asservis à des moyens de mesure de température dans ladite enceinte,
• - des moyens de recyclage d'une partie de l'agent gazeux d'entraînement et/ou fluidisation dans la chambre de combustion en quantité régulée par une ou des vannes de répartition entre une conduite de recyclage et une conduite d'évacuation des fumées.
• - un dépoussiéreur des fumées évacuées qui, pour une meilleure séparation finale des particules d'avec l'agent d'entraînement et/ou fluidisation, est constitué par un filtre électrostatique, laquelle installation comporte en outre :
  • - un premier moyen de répartition de l'agent gazeux d'entraînement et/ou fluidisation entre un circuit de recy_- clage direct et un circuit commun de recyclage et d'évacuation à travers le filtre électrostatique,
  • - un moyen de régulation à une valeur de consigne de la quantité d'agent gazeux d'entraînement et/ou fluidisation traversant le filtre électrostatique, et
  • - un régulateur de pression par mise à l'atmosphère d'une partie de l'agent gazeux dépoussiéré.

The aims of the invention are also achieved by a drying and / or heating installation by entrainment and / or fluidization of a granular or pulverulent combustible material comprising:

• - a drying and / or heating device comprising:
• a drying and / or heating enclosure by entrainment and / or fluidization, at the base of which opens a supply conduit for a gaseous entrainment and / or fluidization agent,
• means for introducing into said enclosure the material to be dried and / or heated,
• - a line for driving the dried and / or heated material,
• means for separating the granular or pulverulent material from the gaseous fluidizing agent,
• a combustion chamber for the production of the gaseous entrainment and / or fluidization agent directed towards the supply line to said enclosure, said combustion chamber comprising at least one burner capable of operating in a given power range,
• means for regulating the liquid or gaseous fuel supplied to the burner, controlled by means of temperature measurement in said enclosure,
• - Means for recycling part of the gaseous entrainment and / or fluidization agent in the combustion chamber in an amount regulated by one or more distribution valves between a recycling pipe and a smoke evacuation pipe.
• - a dust collector for the exhaust fumes which, for better final separation of the particles from the agent drive and / or fluidization, consists of an electrostatic filter, which installation further comprises:
  • - first means of distribution of the gaseous entrainment agent and / or fluidisation between a direct _recycling line and a common circuit for recycling and discharge via the electrostatic filter,
  • a means of regulating the quantity of gaseous entrainment and / or fluidization agent passing through the electrostatic filter at a set value, and
  • - a pressure regulator by venting part of the dusted gaseous agent.

It is advantageous for the means for regulating the quantity of gaseous agent passing through the filter to act directly on said first means for distributing the gaseous agent.

The object of the invention is also achieved by an installation of the preceding type comprising a means for introducing liquid hydrocarbon binder into the solid fuel at one of the stages of the treatment and a device for trapping in carbonaceous liquid the dust collected by the dust collector.

It is advantageous that the means for introducing the liquid hydrocarbon binder into the solid fuel, such as coal, open out downstream of the point of sor _- tie said fuel coal separator device / gas, preferably in a mixing screw of transport, such that it is known per se.

It is also advantageous that the installation comprises, in addition to this means of introducing the liquid hydrocarbon binder into the fuel, a conventional contiguous means for direct introduction of hydrocarbon binder and / or carbonaceous liquid.

• - la figure 1 est un schéma simplifié d'une installation conforme à l'invention,
• - la figure 2 est un schéma de détail du dispositif de piègeage des poussières captées par le dépoussiéreur.

Other characteristics and advantages will emerge from the description, which will be given below by way of example only, of an embodiment of the invention. For this purpose, reference is made to the accompanying drawings, wherein

• FIG. 1 is a simplified diagram of an installation in accordance with the invention,
• - Figure 2 is a detailed diagram of the device for trapping dust collected by the dust collector.

A coal preheating installation comprises a preheater dryer-crusher designated as a whole by 10. This comprises a vertical pipe 11 for driving the coal upwards by hot smoke, a screw conveyor 12 bringing the coal from a hopper 13 to the pipe 11 at a point situated above a venturi 14 provided in the lower part of the pipe 11.

Above the pipe 11 is disposed a fluidization enclosure 15 in the lower part of which opens the said pipe 11, below a rotary impact mill 16.

At the top of the enclosure 15 is born a pipe 17 for driving the preheated and ground coal in the enclosure 15. The pipe 17 makes it possible to drive this coal towards a battery of cyclones 18 comprising two stages, primary cyclone and secondary cyclones , at the tip of which this coal is recovered on a screw conveyor 19 to a storage hopper with a view to its subsequent charging in a coke oven. At the vortex of cyclones 18, the fumes are recovered in a recycling pipe 21 by means of a fan 220

The installation comprises a combustion chamber 20 opening at the base of the ascending pipe 11. This combustion chamber is supplied by a double burner 30 in all respects similar to that which is described in French patent 77 01871 (publication No. 2 378 081), that is to say that it comprises a burner 31, called the main burner, in normal operation for the preheating of the coal, the other 36, called the auxiliary burner, for the standby of the installation in the event of interruption of the coal supply by the transporter 12. Each burner is provided with combustion air regulation means for that the combustion is substantially neutral and also comprises means for regulating the fuel subject to temperature measurements in the fluidization enclosure. The fan 22 recycles by ducts 23 a portion of the fumes withdrawn in 21 in a regulated quantity such that the speed of the total gas flow is kept constant in the fluidization enclosure 15. A regulation assembly 48 makes it possible to regulate the combustion with the double burner 30 as a function of the temperature measured at 43 in enclosure 15.

The essentials of what is known by known methods and devices have been described so far, the auxiliary control and regulation devices shown in the left half of the figure and not recalled above being also known per se, for example by published French patent application No. 2,378,081, without there being any need to describe them again.

A dry electrostatic dust collector 24 is supplied by a line 2, derived from the recycling line 21, from which it separates from part 3 of the line 21. On the gaseous effluent side, the dust collector 24 supplies a discharge line 5 and another recycling pipe 7 joining the pipe 3 upstream of the recycling fan 22. Valves, namely 9 on the pipe 2, 6 on the discharge pipe 5 and 42 on the pipe 3 in its short-circuiting part the filter 24, make it possible to distribute at will the normal gas flow rate V of the line 21 between a flow rate V ₁ of direct recycling in the line 3, a flow rate V ₂ of recycling with dedusting through the line 7 which joins the line 3 and a flow rate V ₃ of evacuated gaseous effluent.

The pressure drop of cyclones 18, a function of the gas flow rate V, is kept constant, as it is known per se, by the action of a valve 1. The flow rate V ₃ of gaseous effluent to be discharged is adjusted by the valve 6 which acts as a pressure regulator to maintain constant the pressure in the electrostatic precipitator 24. According to the invention, a greater or lesser part of the flow recycled in the combustion chamber 20 measured at 4 is derived to be final ment evacuated at 5. For this purpose, the vacuum observed between the inlet and the outlet of the dust collector is measured, the measurement is introduced into a regulator 37 which controls the valve 42 and / or the valve 9 so as to ensure compliance with '' a set value for the vacuum between inlet and outlet of the dust collector.

In all that has been said and in all that follows, it will be noted that a distinction must be made between the separation stage and the dedusting stage. The purpose of the separation stage, constituted by the cyclones 18, is to separate the dried and / or heated granular and / or pulverulent coal and the entrainment gases while accepting the minimum loss of both. . The purpose of the dedusting stage is to restore to the atmosphere or to recycle a gas as free as possible from the dust, for example about <0.05 mm, entrained in the vortex of the cyclones.

An example would be a preheating installation with a processing capacity of 72 t / h. The total smoke flow V, ie 66,000 m ³ N / h which circulates in the preheater, is kept constant by adjusting the flow of smoke VI + V2 recycled in the combustion chamber by means of the fan 22. The excess flow V3 is rejected at the atmosphere.

We have V = VI + V2 + V3 = constant and V2 + V3 = constant.

When the installation operates at nominal speed, the volume V3 is 24,000 m3N / h of smoke. This is by definition the nominal flow rate of the electrostatic precipitator. The flow V2 must be zero and the flow of recycled smoke will then be V1 = 42,000 m ³ N / h.

When the installation operates at a power lower than the nominal power, the flow rate V3 must decrease, for example at half power; the flow rate V3 will then be 12,000 m ³ N / h, the flow rate V2 will be 12,000 m ³ _{N / h} and the flow rate of recycled fumes in the combustion chamber will be V1 + V2 = 54,000 m ³ .

When the installation is in standby condition, for interruption of coal supply, the V3 smoke flow should be very low (around 6 ₀₀ m ³ / h). It will correspond to the heat output of the pilot burner. The flow of recycled smoke in the combustion chamber will then be V2 + V1 with V2 = 24,000 m ³ N / h and V1 = _41,400 m ³ N / h.

Thanks to the invention, the above-mentioned drawbacks relating to the efficiency of the electrostatic precipitator and to the condensation of the fumes causing corrosion of the installation are thus eliminated.

According to the invention, the dust collected in the dry dust collector is sent into the screw conveyor 19 through a carbonaceous liquid trapping device, simply shown by the rectangle 60 in FIG. 1, but shown schematically in its entirety at Figure 2.

At the discharge point of the dry dust collector 24 is provided an Archimedes screw 62 supplying a mixing and homogenization device 63 of sufficient capacity supplied with liquid and hot hydrocarbon product via a pipe 64. The mixture is put into circulation closed in line 64 by means of a pump 67. The pure liquid is topped up by a line 68 in the device 63. A fraction of mixture, corresponding to the production of soot associated with the quantity of liquid sufficient for handling and necessary for the process, is taken from the closed circulation circuit and brought by a pipe 70 to the point of use.

In the example described, the point of utili _- sation is the screw conveyor 19 as aforesaid. It is advantageous to provide an additional point of introduction of the carbonaceous liquid at 74 on the mixing screw 19.

All the pipes are heated by steam, the pipes can be swept with steam to be purged and it is advantageous to control the proportion of the liquid / soot mixture to the flow of preheated coal, as is known per se adding hydrocarbon binder to preheated coal.

It can be seen that the invention makes it possible to recover the soot recovered in a dry dust collector without humidifying with water, to handle the soot safely and without pollution and to transport it to a point of use at a height compatible with the pressure. pump discharge.

In the case of preheated charging in the form of fines, the invention also makes it possible to recycle the sootings of dry dedusting in the coke paste preheated with fuel. However, the invention also makes it possible - to limit take-offs during l 'charging and limiting take-offs when charging with the fuel-soapy mixture.

For example, for an installation enabling ₇₂ t / h of coal to be preheated, 100 to 200 kg / h of soot is produced using an electrostatic precipitator. A total of approximately 0.8% by weight of heavy fuel oil No. 2 heated to 150 ° C. will be added to the total (percentage based on the total amount of preheated coal).

A fraction of the fuel at the rate of approximately 400 kg / h is sprayed with steam in the mixer. The rest, approximately 150 kg / h, is sprayed pure onto the preheated coal in the mixing auger.

In the case of the preheated charging of fines of coal compacted either by pelletizing or by pounding, the invention also makes it possible to recycle the soot in the coke paste preheated with a petroleum bitumen, which moreover, used alone, would have allowed to bring to the preheated coke paste the cohesion necessary to form either balls, or a bread pounded from dry and hot coal and to prepare either balls or a pounded bread after adding in the mixing screw the quantity total of necessary binder of which all or part will have been used to handle the soot.

By way of example, for the aforementioned installation enabling 72 t / h of coal to be preheated, ie approximately 65 t / h of dry coal, it is produced using an electrostatic filter 100 to 200 kg / h of soot. Is added, for example a total of 6% by weight of a petroleum bitumen heated to 150 ⁰ 0 (a percentage of the total amount of preheated coal). A fraction of the bitumen, for example 650 kg (or less) is sprayed with steam in the mixer. The rest, or 3,250 kg / h, is added to the mixing screw with preheated coal. A carbon-binder mixture is thus obtained, suitable either for pelletizing or for pounding, having recycled the soot from the dry dust collector.

The invention has been described with regard to a fluidization drying and / or preheating installation. It also applies equally well to a drying and / or preheating installation by co-current drive by hot fumes.

• - possibilité de profiter en toutes circonstances de l'efficacité des dépoussiéreurs du type électrostatique sec dont la consommation énergétique est très faible.
• - l'efficacité de l'électrofiltre est optimale quelle que soit l'allure de l'installation de préchauffage.
• - le rendement pondéral en charbon préchauffé est amélioré.
• - le fonctionnement de l'installation dans les conditions d'attente devient plus souple et plus sûr et est réglable automatiquement.
• - on réincorpore facilement dans le charbon traité les poussières bien qu'elles se présentent à l'état sec et peu mouillable.

Ultimately, the advantages of the method and of the installation according to the invention are as follows:

• - possibility of taking advantage in all circumstances of the efficiency of dust collectors of the dry electrostatic type whose energy consumption is very low.
• - the efficiency of the electrostatic precipitator is optimal whatever the appearance of the preheating installation.
• - the weight yield of preheated coal is improved.
• - the operation of the installation in waiting conditions becomes more flexible and safer and is automatically adjustable.
• - The dust is easily reincorporated into the treated coal, although it is present in the dry and not very wettable state.

Claims (12)

1) Method of treatment by drying and / or heating by entrainment and / or fluidization of a granular or pulverulent combustible material, in which the fuel is dried and / or heated by entrainment and / or fluidization by introducing it into an enclosure entrainment and / or fluidization, where a regime of entrainment and / or fluidization is established at a given temperature by means of a neutral gaseous agent obtained at a controlled temperature and quantity in a combustion chamber, and from which the fuel is extracted dried and / or heated by pneumatic transport within the effluent gaseous agent, then said fuel is separated from said effluent gaseous agent by distributing said gaseous agent in regulated quantities between a recycling pipe to the combustion chamber and an exhaust outlet for the surplus, process in which the surplus gaseous agent is dusted by a dry dust collector, characterized in that a regulated part of the gas agent is also dry dusted them recycled, at least during the periods of interruption of introduction of the granular or pulverulent combustible material, and the quantity of gaseous agent recycled and dedusted is regulated by imposing on the flow rate of dedusted gas a fixed reference value. 2) Process according to claim 1 in which an auxiliary hydrocarbon binder is injected in the liquid state into the solid fuel at one of the stages of the treatment, characterized in that the dust is trapped in a hot carbonaceous liquid captured by the dry dust collector, then using said hot carbonaceous liquid charged with said dust as an auxiliary hydrocarbon binder, at least partial. 3) Method according to claim 1, characterized in that said hot carbonated liquid, charged with said dust, is injected into the solid fuel after the separation point with the heat transfer gas having served as a gaseous effluent transport agent. 4) Method according to claim 2, characterized in that the carbonaceous liquid is from the group consisting of liquid hydrocarbons, at room temperature or after reheating, such as heavy fuel oil, petroleum bitumens. 5) Installation for drying and / or heating by entrainment and / or fluidization of a granular or pulverulent combustible material for the implementation of the method according to claim 1, comprising: - a drying and / or heating device (10) comprising: - an enclosure (15) for drying and / or heating by entrainment and / or fluidization, at the base of which opens a conduit (11) for supplying a gaseous entrainment and / or fluidization agent, means of introduction (12) into said enclosure of the material to be dried and / or heated, - a drive pipe (17) of the dried and / or heated material, means of separation (18) of the granular or pulverulent material from the gaseous fluidizing agent, - A combustion chamber (20) for the production of the gaseous entrainment and / or fluidization agent directed towards the supply line to said enclosure, said combustion chamber comprising at least one burner (30) capable of operating in a given power range, means for regulating (48) the liquid or gaseous fuel supplied to the burner, subject to means (43) for measuring the temperature in said enclosure, - recycling means (21, 22, 23) of part of the gaseous entrainment and / or fluidization agent in the combustion chamber (20) in an amount regulated by one or more distribution valves between a recycling and a smoke evacuation pipe, - an evacuated dust collector which, for better final separation of the particles from the agent drive and / or fluidization, is constituted by an electrostatic filter (24), characterized in that it comprises - A first means of distribution (37) of the gaseous entraining and / or fluidizing agent between a direct recycling circuit (3) and a common circuit (2) of recycling and evacuation through the electrostatic filter (24 ), a means of regulation (9) at a set value of the quantity of gaseous entraining and / or fluidization agent passing through the electrostatic filter (24), and - a pressure regulator (6) by venting part of the dusty gaseous agent. 6) Installation according to claim 5, characterized in that the means for regulating the amount of gaseous agent passing through the filter (24) acts directly on said first means for distributing the gaseous agent. 7) Installation according to claim 5, comprising means for introducing liquid hydrocarbon binder into the coal in one of the treatment steps, characterized in that it comprises a device for trapping (60) in carbonaceous liquid of the dust collected. by the dust collector (24). 8) Installation according to claim 7, characterized in that it comprises means for taking up (67) the carbonaceous liquid - dust mixture and for injecting (70) this mixture into the circuit of the means for introducing the hydrocarbon binder to one of the processing steps. 9) Installation according to claim 8, characterized in that the means for introducing (70) the liquid hydrocarbon binder into the coal open downstream of the coal outlet point of the coal / gas separator device (18). 10) Installation according to claim 9, comprising, at the coal outlet of the separator device coal / gas, a mixing screw for transport, characterized in that the means for introducing the hydrocarbon binder open into said mixing screw (19). 11) Installation according to claim 5, characterized in that it comprises a recirculation pump (67) and a pipe (64) for recirculating the content of the trapping device (60). 12) Installation according to claim 5, characterized in that it comprises, in addition to the first means (70) for introducing the liquid hydrocarbon binder into the coal, a second contiguous means (74) for direct introduction of hydrocarbon binder and / or carbonaceous liquid.

Images