EP2804686A1

EP2804686A1 - Method for the sedimentation of sediment particles in a method for extracting diesel oil

Info

Publication number: EP2804686A1
Application number: EP13704371.7A
Authority: EP
Inventors: Wolfgang Spiess
Original assignee: CATALYTEC
Current assignee: CATALYTEC
Priority date: 2012-01-20
Filing date: 2013-01-18
Publication date: 2014-11-26
Also published as: DE102012000975A1; US20140374364A1; CA2861940A1; WO2013107891A1

Abstract

The invention relates to a method and a device for the sedimentation of sediment particles in a method for extracting diesel oil from a liquid substance mixture moving in a circuit and comprising oil, hydrocarbon-containing residues and catalyst particles, by means of catalytic, pressureless depolymerisation (CPD). Sediment particles are removed from the substance mixture by guiding said mixture via a spiral-shaped guide arrangement. Hydrocarbon-containing residues are admitted into a lattice arrangement downstream of the spiral-shaped guide arrangement, wherein the substance mixture flows around or flows through said lattice arrangement.

Description

Method for sedimenting segmented particles in a process for the production of diesel oil

The invention relates to a method for sedimenting

Sediment particles in a process for the production of diesel oil from a circulating liquid mixture comprising oil, hydrocarbon-containing residues and catalyst particles, by means of catalytic pressure-free treatment (KDV), and a sedimentor for carrying out the method.

DE 10 2005 056 735 B3 discloses the process for producing diesel oil from hydrocarbon-containing residues in a mixed substance cycle with solids separation and product distillation for the diesel product. The substance mixture is an oil, residue and

Catalyst mixture. The residues used contain long-chain

Hydrocarbons, by means of the catalyst in as diesel components suitable short-chain hydrocarbons are split. To the

Evaporation of the diesel components from the circulated in a circuit and heated to 280 to 320 ° C liquid mixture, a separator is provided, in which the mixture is sprayed by means of Venturi nozzles to produce a large evaporation surface.

During prolonged operation, the catalyst material used can be inactivated because components of the circulating mixture of substances deposit on the catalyst surface. This reduces the yield of diesel oil.

The object of the present invention is to specify an improved method and a device for carrying out the improved method.

According to the invention, this object is achieved with the subject matter of claim 1. A method is proposed for sedimenting sediment particles in a process for recovering diesel oil from a recirculating liquid mixture comprising oil, hydrocarbonaceous residues and catalyst particles by means of catalytic depressurisation (KDV), wherein it is provided that the substance mixture

Sediment particles are extracted by passing it over a spiral

Conductor is passed, and that the hydrocarbonaceous residues are fed downstream of the spiral guide in a grid device, which flows around and / or flows through the mixture.

By sedimenting the mixture is a trouble-free

Continuous operation allows, with the sediment after removal in further Verfahrensschntten can be prepared by, for example, pollutants and recyclable residues are separated.

It can be provided that the substance mixture is deflected after exiting the guide so that it flows around the grid device from top to bottom.

In an advantageous embodiment it can be provided that the

Sediment particles inactivated catalyst particles include.

It can further be provided that the substance mixture is arranged in a space between the spiral guide device and the grid device

Labyrinth device is swirled. Due to the swirling can a

Separation of the sediments are achieved according to their mass distribution, with massive sediment particles in the vortex flow to the outside and low-mass particles flow inward.

Further claims are directed to the sedimentor used in the process.

It can be provided that the sedimentor comprises a central container, wherein in the central container an outer inner container, an inner

Inner container and a mesh container are arranged nested, and wherein between the central container, the outer inner container, the inner inner container and the mesh container in each case a distance space is formed, wherein the distance spaces a labyrinthine

Make flow space for the mixture, and wherein in the

Distance space between the central container and the outer inner container a helical guide is arranged.

Advantageously, it can be provided that the longitudinal axis of

Central container is aligned vertically.

The central container, the outer inner container, the inner inner container and the mesh container may be arranged coaxially with each other.

It can be provided that the spiral-shaped guide device is arranged on the inner wall of the central container and / or on the outer wall of the outer inner container.

It can further be provided that the labyrinth-like flow-through space is formed by a plurality of cross-sectionally annular through-flow chambers arranged coaxially with one another.

The mixture of substances flowing through the throughflow spaces can each be deflected by 180 °. Preferably, the flow-through chambers could deflect the substance mixture alternately downwards and upwards.

The invention will now be explained in more detail with reference to exemplary embodiments. Show it

Fig. 1 shows an embodiment of an inventive in the

Method used sedimentor in schematic

Section;

Fig. 2 is a block diagram of an application example of the device in

Fig. 1. Fig. 1 shows an embodiment of a sedimentor, which can be used in a described in Fig. 2 KDV plant 2 for catalytic unpressurized REFILL. In the KDV plant 2 at a process temperature of 280 to 320 ° C long-chain hydrocarbons under the action of a catalyst in short-chain hydrocarbons, such as those contained in diesel oil, split. This is a liquid at the process temperature

Mixture of substances, which is an oil, residue and catalyst mixture, conveyed by a liquid ring pump 1 in the circulation.

The sedimentor 28 comprises a vertically arranged central container 28z, above which a separator 21 is arranged. The central container 28z is formed as a cylindrical container, which merges into a conical foot portion. Above the separator 21, a distillation column 22 is arranged, as described further below in FIG.

In the cylindrical container, an outer inner container 28a, an inner inner container 28i and a mesh container 28g are nested one inside the other. The cup-shaped inner container 28a and 28i each have a conical bottom. The bottom of the outer inner container 28a faces upward, the bottom of the inner inner container 28i faces downward.

Between the central tank 28z, the outer inner tank 28a, the inner inner tank 28i and the mesh tank 28g is respectively one

Spacer formed.

From a mixture 29 entering the separator 21, short-chain hydrocarbons exit as vapor 24d, which, as described below, is present as diesel oil 24 after condensation. Evaporated mixture 29r is now in the distance space between the central container 28z and the outer inner container 28a passed, in which a helical guide 281 is arranged, on which the mixture 29r spirally slides down. The mixture 29r is fluidized in the spiral baffle 281 separating sediment particles 32 which, after leaving the spiral baffle 281, sink downwards as bottom sludge and are collected in the tapered root portion of the central tank 28z from which they can be discharged. The sediment particles also include inactivated catalyst particles whose surface is contaminated and added.

The liberated from the sediment particles 32 mixture 29r now enters the distance space between the outer inner container 28a and the inner inner container 28i and flows upwards. Then that occurs

Mixture 29r in the space between the inner inner container 28i and the mesh container 28g and penetrates the introduced into the mesh container 28g hydrocarbon-containing residue 30. The residue 30 is dissolved and / or homogenized by the heated to 280 to 320 ° C mixture 29r. There is thus formed a substance mixture 29a enriched with the residue 30, which leaves the central container 28 via the conical bottom of the inner inner container 28i and re-enters the material cycle.

Fig. 2 shows an embodiment for use of the device described in Fig. 1.

The liquid ring pump 1 has a suction nozzle 13, a pressure port 14 and a gas nozzle 15 for the introduction of an inert gas, which in the liquid ring pump 1 located in the mixture 29 a Foam phase forms. The substance mixture 29a still reacts in the

Liquid ring pump 1 with the catalyst particles, whereby long-chain hydrocarbons are split into short-chain hydrocarbons. It thus forms a mixture 29 containing short-chain hydrocarbons. The mixture 29 is via a pipe into the separator 21st

registered, in which the short-chain hydrocarbons evaporate. The vapor 24d flows into the above the separator 21 arranged

Distillation column 22 and then passes into a downstream of the distillation column 22 arranged capacitor 23. In the condenser 23 condensate collects in the form of diesel oil 24, which is collected in a product tank 25. The product tank 25 is vented by means of a vacuum pump 26, wherein over the diesel oil 24 accumulated exhaust gas 27 is supplied to a portion of the gas nozzle 15 of the liquid ring pump 1. To start the process, instead of the exhaust gas, an inert gas from a

Gas cylinder fed, such as nitrogen.

From the separator 21, the evaporated substance mixture 29r flows into the sedimentor 28 in which, as described above in FIG. 1, sediment particles are removed from the substance mixture 29r and new residue 30 is added.

The enriched mixture 29a is then fed to the suction nozzle 13 of the liquid ring pump 1, whereby the material cycle is closed.

LIST OF REFERENCE NUMBERS

1 liquid pump

2 KDV system

13 suction nozzles

14 pressure sockets

15 gas nozzles

21 separator

22 distillation column

23 capacitor

24 diesel oil

24d diesel steam

25 product tank

26 vacuum pump

27 exhaust

28 sedimentor

28a outer inner container

28e entry-neck

28g lattice container

28I guide

28i inner inner container

28z central container

29 mixture of substances

29a enriched substance mixture

29r evaporated mixture

30 residue

31 waste storage tank

32 sediment particles

Claims

claims

A method for sedimenting sediment particles in a process for recovering diesel oil from a recirculating liquid mixture comprising oil, hydrocarbonaceous

Residues and catalyst particles, by means of catalytic pressureless oil reduction (KDV),

characterized,

Sediment particles are removed from the mixture by passing it over a spiral guide, and

in that the hydrocarbon-containing residues downstream of the helical guide are introduced into a grid device, which flows around and / or flows through the mixture of substances.

Method according to claim 1,

characterized,

that the substance mixture is deflected after exiting the guide so that it is the grid device from top to bottom flows around.

3. The method according to claim 1 or 2,

characterized,

the sediment particles comprise inactivated catalyst particles.

Method according to one of the preceding claims,

characterized,

that the mixture of substances in one between the spiral

Guiding device and the grid device arranged

Labyrinth device is swirled.

5. Sedimentor (28) for carrying out the method according to one of

Claims 1 to 4, comprising a central container (28z),

characterized,

in the central container (28z) an outer inner container (28a), an inner inner container (28i) and a mesh container (28g) are arranged nested in one another,

that between the central container (28z), the outer inner container (28a), the inner inner container (28i) and the mesh container (28g) is formed in each case a distance space, wherein the distance spaces form a labyrinth-like flow space for the mixture, and

in that a helical guide (28I) is arranged in the space between the central container (28z) and the outer inner container (28a). Device according to claim 5,

characterized,

the central container (28z), the outer inner container (28a), the inner inner container (28i) and the mesh container (28g) are arranged coaxially with one another.

Apparatus according to claim 5 or 6,

characterized,

in that the helical guide (28I) is arranged on the inner wall of the central container (28z) and / or on the outer wall of the outer inner container (28a).

Device according to one of claims 5 to 7,

characterized,

that the labyrinth-like flow space through several in the

Cross-section annular coaxial with each other

Durchströmungsräume is formed.

Device according to one of claims 5 to 8,

characterized,

that the mixture of substances flowing through the throughflow spaces is deflected by 180 ° in each case.

Device according to one of claims 5 to 9,

characterized,

the longitudinal axis of the central container (28z) is oriented vertically.