AU2014365396B2 - Apparatus for the mechanical separation of oil and tar from gas condensate - Google Patents

Apparatus for the mechanical separation of oil and tar from gas condensate

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Publication number
AU2014365396B2
AU2014365396B2 AU2014365396A AU2014365396A AU2014365396B2 AU 2014365396 B2 AU2014365396 B2 AU 2014365396B2 AU 2014365396 A AU2014365396 A AU 2014365396A AU 2014365396 A AU2014365396 A AU 2014365396A AU 2014365396 B2 AU2014365396 B2 AU 2014365396B2
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AU
Australia
Prior art keywords
oil
compartment
tank
tar
gas condensate
Prior art date
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Application number
AU2014365396A
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AU2014365396A1 (en
Inventor
Frederic Judas
Erhard Lath
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Application filed by LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Publication of AU2014365396A1 publication Critical patent/AU2014365396A1/en
Assigned to L' AIR LIQUIDE, SOCIETE ANONYME POUR L' ETUDE ET L' EXPLOITATION DES PROCEDES GEORGES CLAUDE reassignment L' AIR LIQUIDE, SOCIETE ANONYME POUR L' ETUDE ET L' EXPLOITATION DES PROCEDES GEORGES CLAUDE Amend patent request/document other than specification (104) Assignors: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/001—Purifying combustible gases containing carbon monoxide working-up the condensates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B01D17/0211—Separation of non-miscible liquids by sedimentation with baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B01D21/0045—Plurality of essentially parallel plates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
    • C10K1/046—Reducing the tar content
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Industrial Gases (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)

Abstract

An apparatus for the mechanical separation of oil and tar from gas condensate, which comprises a tank which is equipped with a container to be traversed by gas condensate, which contains metallurgical coke, and with parallel plate separators, wherein partitions divide the container volume into compartments in which the oil and the tar settle from the gas condensate under the influence of gravity.

Description

Field of the Invention
This invention relates to an apparatus for the mechanical separation of oil and tar from gas condensate, which comprises a tank which is equipped with a container to be traversed by gas condensate, which contains a coalescing aid and with parallel plate separators, wherein the partitions divide the container volume into compartments in which the oil and the tar settle from the gas condensate under the influence of gravity.
Prior art
By means of fixed-bed pressure gasification reactors solid fuel, such as coal, coke or other carbonaceous fuel, is gasified with steam and oxygen as gasification medium at elevated temperature and, in most cases, at excess pressure to obtain a synthesis gas containing carbon monoxide and hydrogen, wherein a solid ash is obtained, which is discharged from the reactor via an ash discharge grate which in many cases is formed as rotary grate. This type of reactor frequently also is referred to as FBDB (= Fixed Bed Dry Bottom) pressure gasifier. During cooling of the gas produced, gas condensate is formed. This is the condensed steam content of the gas from the water content of the raw material (in the case of coal), undecomposed steam and formation water, which is obtained during the
WO 2015/090981
PCT/EP2014/076489 gasification by partial oxidation of the hydrogen contained in the raw material, cf. Ullmanns Encyklopadie der technischen Chemie, 4th edition, vol. 14., p. 449.
Before the gas condensate can be disposed of as waste water in a biological clarification plant, it must be reprocessed for reasons of environmental protection and the recovery of valuable products. First of all, oils, tar and dust and later on also phenols and ammonia are separated from the gas condensate. Accordingly, at the beginning of these process steps oil and tar are separated from the gas condensate in a mechanical way.
The apparatuses which are used for the mechanical separation of oil and tar from the gas condensate are settling tanks in which the impurities are separated from the gas condensate solely because of their density differences and the influence of gravity. Apparatuses of this kind are known per se, cf. Ullmanns Encyklopadie der technischen Chemie, 4th edition, vol. 14., p. 450, Fig. 59. Coarser tar particles and oil droplets thus can be separated from the gas condensate with reasonable effort. The settling tanks described above, however, are not well suited for separating smaller tar particles and oil droplets, since the separation processes then proceed very slowly and require a long residence time of the gas condensate in these settling tanks and hence a large volume of these apparatuses and a high amount of space and costs.
Therefore, it is the object of the invention to provide an apparatus with which also finer tar and oil particles can be separated from the gas condensate in a mechanical way and with a reasonable amount of space and costs.
Description of the Invention
This object is solved by an apparatus according to claim 1.
The invention also utilizes the density differences between the impurities, oil and tar, and the aqueous condensate, for separation.
WO 2015/090981
PCT/EP2014/076489
For accelerating the coalescence of the oil and tar droplets emulsified in the gas condensate, the gas condensate first is passed through a packing of metallurgical coke and subsequently through parallel plate separators. The plates of these separators also can be formed as corrugated plates, and in this case these separators are referred to as corrugated plate separators.
The apparatus according to the invention consists of an outer tank with a rectangular cross-section. The tank can be open or closed towards the atmosphere. When constituents outgassing from the gas condensate are to be discharged in an environmentally compatible way, the tank is designed in a closed form and at slight excess pressure of 30 to 60 mbar superimposed by a gas stream, e.g. consisting of nitrogen. The gas stream is discharged from the tank into a cleaning device or for combustion, e.g. by means of a torch.
Partitions divide the outer tank into several compartments which one after the other are traversed by the gas condensate. The inlet compartment is arranged centrally in the middle of the tank and contains the packing with the metallurgical coke. The packing is accommodated in a rectangular container, whose upper and lower sides are perforated, so that the packing can be traversed by the gas condensate. Below the packing, the gas condensate to be cleaned is fed into the apparatus via a supply conduit. The bottom of the compartment has a conical design and at the deepest point has an opening for discharging tar sunken down into the bottom. Above the inlet compartment a second compartment, the socalled oil separation compartment is located, into which the gas condensate enters after traversing the metallurgical coke.
In this oil separation compartment, the gas condensate stream is split, so that a partial stream each flows off through the parallel or corrugated plate separators arranged to the left and right of the inlet compartment into a respective further and hence last tank compartment. The oil droplets formed in the coke packing and in the parallel or corrugated plate separators here rise in the gas condensate and form an oil layer on the surface. The oil from this oil layer is withdrawn from the tank via a weir.
WO 2015/090981
PCT/EP2014/076489
The tar droplets contained in the gas condensate likewise coalesce in the parallel or corrugated plate separators and sink into the conical bottom of the next compartment, into which the separators open, of the so-called condensate outlet compartment. The tar then can be withdrawn from the conical bottom.
The partitions between the oil separation compartment and the condensate outlet compartments following to the right and left are equipped with passages for that part of the oil which in flow direction of the gas condensate exits from the parallel or corrugated plate separators and rises at the partitions.
In an advantageous aspect of the invention, pipes are connected to the passages, which in the oil separation department open slightly, preferably 0.2 m, below the liquid surface. By means of these pipes it is avoided that the oil droplets in part are again entrained by the gas condensate flow and cannot rise to the surface.
The cleaned gas condensate is withdrawn from the condensate outlet compartments via one weir each. The height of the weirs of the oil separation and condensate outlet compartments must be adjusted to each other such that via the weir of the oil separation compartment a largely anhydrous oil phase is withdrawn.
The invention furthermore relates to the use of the apparatus according to the invention for the mechanical separation of oil and tar from gas condensate obtained during the fixed-bed pressure gasification of carbonaceous fuels, whereby particularly favorable separation properties are achieved.
Exemplary Embodiments
Further developments, advantages and possible applications of the invention can also be taken from the following description of non-limiting exemplary embodiments and numerical examples as well as the drawing. All features
WO 2015/090981
PCT/EP2014/076489 described and/or illustrated form the invention per se or in any combination, independent of their inclusion in the claims or their back-reference.
With reference to the drawing, Figs. 1 and 2, the apparatus according to the invention will now be explained.
Fig. 1 shows a longitudinal section of the apparatus 1.
Fig. 2 shows a top view of the apparatus 1 (as seen through the tank lid).
The drawing shows:
- the apparatus 1 comprising the outer tank 2 with the rectangular cross-section and the internal fittings present therein, which subsequently will be referred to in detail,
- the partitions 3a, b which form the inlet compartment 3, into which the gas condensate to be cleaned is fed via the feed pipe 5,
- the coalescing agent tank 4, which is filled with metallurgical coke and whose upper and lower sides 4a, b are perforated,
- the parallel or corrugated plate separators 6a, b,
- the partitions 7a, b which separate the oil separation compartment 7 from the remaining tank space,
- the oil collecting sheets 9a, b installed on the partitions 7a, b with one long side,
- the pipe conduits 10a, b which conduct the oil collected under the oil collecting sheets, which passes through an opening in the respective partition not shown in the drawing to just below the liquid surface 13 in the oil separation compartment 7,
- the weir 8 and the adjoining discharge pipe conduit, through which the oil separated from the gas condensate is discharged from the oil separation compartment 7 and from the apparatus 1,
- the weirs 12a and 12b with their connected discharge pipe conduits, via which the gas condensate cleaned in the apparatus from oil and tar is discharged from the apparatus and from the condensate outlet compartments 11 a and 11 b,
WO 2015/090981
PCT/EP2014/076489
- the cone-shaped bottoms 3c, 11c and 11 d with their discharge conduits at their deepest points for discharging tar.
With a design of the apparatus 1 closed against the atmosphere, a superposition 5 gas, for example nitrogen, can be introduced into the apparatus and discharged from the apparatus via an inlet tube 14 and an outlet tube 15.
WO 2015/090981
PCT/EP2014/076489
List of Reference Numerals
1 apparatus according to the invention
2 outer tank
5 3 inlet compartment
3a, b partitions
3c conical bottom with discharge pipe conduit
4 coalescing agent tank
4a, b perforated tank bottom
10 5 feed pipe
6a, b parallel or corrugated plate separators
7 oil separation compartment
7a, b partitions
8 weir with discharge pipe conduit
15 9a, b oil collecting sheets
10a, b pipe conduits
11a, b condensate outlet compartments
11c, d conical bottoms with discharge pipe conduits
12a, b weirs with discharge conduits
20 13 liquid surface
14 inlet pipe for superposition gas
15 outlet pipe for superposition gas
WO 2015/090981
PCT/EP2014/076489

Claims (2)

  1. Claims:
    1. An apparatus 1 for the mechanical separation of oil and tar from gas condensate, comprising an outer tank 2 with rectangular cross-section, which is open towards the atmosphere and is traversed by the gas condensate, with the following features:
    - planar, vertical partitions 3a, 3b, forming an inlet compartment 3 for accommodating the coalescing agent tank 4, a conical compartment bottom 3c with bottom outlet at its deepest point for discharging tar sunken down,
    - an inlet pipe 5 for introducing the gas condensate to be cleaned into the inlet compartment 3 of the apparatus 1,
    - coalescing agent tanks 4, a rectangular container filled with metallurgical coke which is arranged in the inlet compartment 3 above the orifice of the feed pipe 5, transversely to the long side of the tank 2 across the entire width of the tank 2, whose walls are perforated on the upper and lower sides 4a, 4b, so that the gas condensate can traverse the tank 4 from bottom to top,
    - parallel or corrugated plate separators 6a and 6b, each arranged to the left and right of the inlet compartment 3, in the form of a rectangular box taking the entire width of the tank 2, wherein the parallel plate separators are arranged at an angle of about 45° against the horizontal,
    - an oil separation compartment 7 of the tank 2, separated from the remaining tank space by the upper sides 4b of the coalescing agent tank and the parallel plate separators 6a and 6b, and vertical planar partitions 7a and 7b directly adjoining the lower outlet side of the parallel plate separators, wherein the oil separation compartment 7 is upwardly open towards the atmosphere, wherein in the upper part of the compartment 7 a weir 8 with discharge conduit is installed, which defines the liquid level in the compartment 7 and via which the separated oil is discharged from the apparatus 1,
    2014365396 01 Feb 2018
    - condensate outlet compartments 11a and 11b, arranged to the left and right of the inlet compartment 3, separated from the oil separation compartment 7 by the partitions 7a and 7b and the parallel plate separators 6a and 6b and from the inlet compartment 3 by the partitions 3a and 3b, wherein the lower outlet side of the parallel plate separators 6a and 6b opens into these compartments,
    - wherein the partitions 7a and 7b each are equipped with an oil collecting sheet 9a and 9b, wherein the long edge of the sheets each extends horizontally across the entire width of the tank 2 and the short edge of the sheets is inclined downwards at an angle, so that oil rising from the parallel plate separator 6a, 6b at the partition 7a, 7b is collected thereunder and one or more openings in the walls 7a and 7b below the collecting sheets, through which the oil accumulated below the collecting sheets can pass over into the compartment 7,
    - cone-shaped compartment bottoms 11c and 11d with outlets at their deepest points for discharging tar, weirs 12a and 12b installed in the upper region of the compartments with discharge conduits, for defining the liquid level in these compartments and for discharging the condensate water cleaned from oil and tar.
  2. 2. The apparatus according to claim 1, wherein to the openings in the partitions 7a and 7b pipes 10a, 10b are connected, through which the oil can flow off to the top, wherein the orifice of the pipes preferably is located 0.2 m below the height of the weir 8.
    25 3. The apparatus according to claim 1 or 2, wherein the outer tank 2 is closed against the atmosphere and is provided with an inlet pipe 14 and an outlet pipe 15 for introducing and discharging a gas stream for superposition of the outer tank 2 with a gas stream under excess pressure of preferably between 30 and 60 mbar with respect to the atmosphere.
    30 4. Use of the apparatus according to any one of claims 1 to 3 for the mechanical separation of oil and tar from gas condensate obtained during the fixed-bed pressure gasification of carbonaceous fuels.
    WO 2015/090981
    PCT/EP2014/076489
    1/1
    Fig. 2
AU2014365396A 2013-12-16 2014-12-04 Apparatus for the mechanical separation of oil and tar from gas condensate Active AU2014365396B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102013114116.1 2013-12-16
DE102013114116.1A DE102013114116B4 (en) 2013-12-16 2013-12-16 Device for the mechanical separation of oil and tar from gas condensate and use of the device
PCT/EP2014/076489 WO2015090981A1 (en) 2013-12-16 2014-12-04 Apparatus for the mechanical separation of oil and tar from gas condensate

Publications (2)

Publication Number Publication Date
AU2014365396A1 AU2014365396A1 (en) 2016-07-21
AU2014365396B2 true AU2014365396B2 (en) 2018-02-22

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CN (2) CN204582612U (en)
AU (1) AU2014365396B2 (en)
DE (1) DE102013114116B4 (en)
WO (1) WO2015090981A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102013114116B4 (en) * 2013-12-16 2016-06-09 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Device for the mechanical separation of oil and tar from gas condensate and use of the device
CN107297088A (en) * 2016-04-14 2017-10-27 黑珀（上海）工业技术有限公司 A kind of conduction oil cleaning treatment system
CN107585731A (en) * 2017-09-29 2018-01-16 江苏云端重工科技有限公司 A kind of Bituminous concrete surface reclaims charging aperture
KR102614264B1 (en) * 2019-09-19 2023-12-18 주식회사 엘지화학 Neutralization/Water Separate Tank For Esterification Products And The Method For Neutralizing/Water Separating Esterification Products
CN112591325B (en) * 2020-11-27 2022-07-26 安徽工业大学 Mechanical slag discharge type conical bottom type tar storage tank

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Also Published As

Publication number Publication date
WO2015090981A1 (en) 2015-06-25
DE102013114116A1 (en) 2015-06-18
AU2014365396A1 (en) 2016-07-21
CN204582612U (en) 2015-08-26
DE102013114116B4 (en) 2016-06-09
CN104707363A (en) 2015-06-17
CN104707363B (en) 2019-04-26

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