DD280774A1 - METHOD FOR PROCESSING SOLIDS-BASED HYDROCARBONS - Google Patents

Abstract

The invention relates to a process for the treatment of solids-containing Kohlenwasserstoffrueckstaende, in particular from the hydrogenation of coal, coal and Erdoelrueckstaenden. The object is achieved in that the high-viscosity solids-containing Rueckstaende the hot separator with a seizure temperature of 300 to 500C are fed continuously into several parallel heated bubbles in succession, wherein during filling the bladder is connected to a vacuum column. After reaching a maximum degree of filling, the bubble is separated from the vacuum column and connected to a condensation system to condense the resulting in the ongoing coking fission products.

Description

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Field of application of the invention

The invention relates to a process for the processing of solids-containing liquid hydrocarbons. It may preferably be used for working up the high-boiling solids-containing sludge resulting from the hydrogenation of coal, coal oil or petroleum residues.

Characteristic of the known state of the art

In the hydrogenation of coal, coal oil or petroleum residues accumulate in the hot separator highly viscous solids-containing products, which must be subjected to further processing, which is done once by mechanical methods such as filtering, centrifuging or by smoldering of the centrifugal residue.

The recent literature describes processes for solid-liquid separation in vacuum columns, such a process for working up by means of a vacuum flash column is also presented.

In the separation in vacuum columns but the foststoffhaltige and highly viscous medium must be reheated in preheaters. However, since these hydrocarbons are highly prone to coking, they form deposits in the preheater pipes.

Therefore, hydrogen is added during direct carbonization, counteracting coking. In order to prevent coke formation in other tube furnace, steam is added to the product.

Also known is a process for the treatment of solids-containing residues of coal hydrogenation, in which the Hoißabscheiderrückstände be relaxed without heating in a vacuum column. The residue of the vacuum column is mixed with hydrogen-rich excess gases, compressed to pressures of 5 to 10 MPa and after a further common heating, the mixture is expanded and thus achieved by flash evaporation further solid enrichment.

With the known technologies, the solids-containing sludge of the hot separator can be worked up in hydrogenation processes. But they have the disadvantage that expensive technologies are used, or the proposed solutions are prone to failure.

The main problems are seen in the coking tendency of the solids-containing sludge during heating and in the erosion effect of the solids when relaxing. It is therefore to be expected with frequent technical disturbances.

Object of the invention

It is an object of the invention to overcome the above drawbacks and thus to allow an economical and trouble-free processing of the sludge of the hydrogenation of coal or petroleum residues, to control the coking of products targeted to limit erosion in the equipment and at the same time a new formation of low-boiling hydrocarbons to reach.

Explanation of the essence of the invention

It is an object of the invention to allow the processing of the residue of the hydrogenation of coal, coal oil or petroleum residues economically and technically reliable so that a maximum of liquid products is separated from dom residue to obtain enough recycle oil for the process.

The object is achieved in that the highly viscous solids-containing residues of the hot separator with a seizure temperature of 300 to 500 ⁰ C are continuously fed into several parallel heated bubbles in succession, wherein during the filling of the bladder is connected to a vacuum column. After reaching a maximum degree of filling, the bubble is separated from the vacuum column and connected to a condensation system to condense dia in the ongoing coking occurring fission products.

The shut-off valve, which connects the bladder to the condensation system, opens at a pressure of -1,0bar, depending on the internal bladder pressure. During the coking process and the application of the resulting coke, the subsequent bubble is filled as described.

The resulting condensates and vacuum distillates are worked up by known methods. After completion of the coking and cooling of the bladder contents of the bottom of the bladder is opened and the contents discharged mechanically or hydromechanically by high-pressure water jet.

A use of the residue for burning or gasification is possible.

embodiment

The invention will be explained in more detail with reference to an embodiment and to the schematic diagram, Fig.1.

example

According to Figure 1, the high-viscosity, solids-containing residues of the hot separator of a coal, coal oil or Erdclrückstandhydrogenation over the pipe 1 with the shut-off valve 2 open the bladder B1 supplied. The bladder 81 is heated and is connected during the filling process via the shut-off valve 3 with the vacuum distillation 16, so that the escaping in the bubble B1 Kohlenwi- sserstoffdämpfe in the vacuum distillation are verarheitet in a known manner. The temperature of the bubble content is about 38O ⁰ C at about 50 Torr. After reaching the upper level of the bladder B1, the valve 4 of the bubble B 2 is opened, which happens with simultaneous closing of the valve 2 of the bladder B1. The bubble B 2 is filled in the same way, which is connected via the valve 5 with the vacuum distillation 16.

The filled bladder B1 is separated by closing the armature 3 from the vacuum column and the heating is continued continuously up to a product temperature of 450 ° C to 500 ⁰ C, whereby the coking process begins. If the internal bubble pressure of -1 bar is reached, opens the shut-off valve 10 and connects the bladder B1 via a line 14 with a condensation system 15, in which the boi of the fissuring coking in the bladder B1 resulting vapors are condensed in a known manner.

After completion of the coking wild the bubble B1 separated by closing the shut-off valve 10 from the condensation part 15 and turned off the heater. After dropping the temperature of the bubble content to t = 15O ⁰ C, the bubble is opened and emptied by a suitable discharge of the coke. Thus, the bubble is after closure for refilling again at your disposal.

The described technological sequence is repeated analogously for the bubbles B 2 to B4.

Claims (3)

Invention claim: 1. A process for the treatment of solids hydrocarbons, especially residues of coal, coal oil and Erdölrückstandsnydrierung by distillative separation of the mixture, by heating and pressurized by evaporation of the liquid components and the solidification of the residue, characterized in that the resulting liquefaction from the Hydrogenation with a Seerberterrperatur from 300 to 500 ° C continuously and successively fed into several heated and parallel bubbles to the maximum level, wherein during the filling process, each of the bubbles is connected to a vacuum column, there is a maximum evaporation of high-boiling liquid products, after which Upon reaching the maximum level of the bubble this is separated from the vacuum Kolorme; at the same time, the feed of the residue into the next empty bubble and there is further heated to increase the internal pressure, at a pressure of 1 bar, the bubble is connected to a condensation system and the residue coked thermally in the bladder. 2. The method according to claim!, Characterized in that only one bubble is charged and only this is connected during the filling of a common vacuum column. 3. The method according to claim 1 and 2, characterized in that a plurality of bubbles, but at least two, are connected.