EP0155598A2 - Procédé de gazéification souterraine de charbon - Google Patents

Procédé de gazéification souterraine de charbon Download PDF

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Publication number
EP0155598A2
EP0155598A2 EP85102572A EP85102572A EP0155598A2 EP 0155598 A2 EP0155598 A2 EP 0155598A2 EP 85102572 A EP85102572 A EP 85102572A EP 85102572 A EP85102572 A EP 85102572A EP 0155598 A2 EP0155598 A2 EP 0155598A2
Authority
EP
European Patent Office
Prior art keywords
gasification
coal
pipeline
seam
burning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85102572A
Other languages
German (de)
English (en)
Inventor
Karl Dr. Wisseroth
Richard Scholl
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.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP0155598A2 publication Critical patent/EP0155598A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/14—Drilling by use of heat, e.g. flame drilling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • E21B43/243—Combustion in situ

Definitions

  • the invention relates to a method for underground gasification of coal in coal mines, in which one or more gasification agents for the gasification reaction and ignition means for triggering them from the surface of the earth are supplied to the seam through a hole.
  • the present invention is therefore based on the object of developing a method for the underground gasification of coal in coal seams which permits economical operation while avoiding the disadvantages described.
  • the gasification and ignition means are brought up to the seam through a pipe coaxially arranged in the bore and, after ignition of the exothermic gasification reaction, the pipe with its Sp / P
  • the gasification and ignition means are brought through the annular space to the seam material surrounding the advanced pipeline, so that after renewed ignition the combustion channel is expanded like a cavern by burning, the the resulting gasification products are piped to the surface.
  • Figure 1 shows the generation of a combustion channel in the seam through the drilling flame
  • Figure 2 shows the cavern-like expansion of the combustion channel.
  • both one or more gasification agents S such as air, oxygen and water for the gasification reaction and ignition means Z such as e.g. rolled and surface ignited saltpeter paper to trigger the gasification reaction up to seam 3.
  • gasification agents S such as air, oxygen and water
  • ignition means Z such as e.g. rolled and surface ignited saltpeter paper to trigger the gasification reaction up to seam 3.
  • a depression in the seam is formed by burning, into which the pipeline with its mouth 4 or an attached nozzle is guided with the drilling flame that forms, so that a burning channel 5 is formed as the burning progresses.
  • the gasification products V produced in this process are conducted through the annular space 6 between the bore and the pipeline to the surface.
  • Water W is added to the gasifying agent to cool the pipe mouth 4 or nozzle. Without the addition of water - for example when using pure oxygen - high temperatures (2000 ° C) arise very quickly, so that the material of the pipe mouth or nozzle would melt. On the one hand, by adding suitable amounts of water using the Endothermic reaction between coal and water according to the chemical equation a lowering of the reaction temperature can be forced.
  • the distance between the front of the burnup and the pipe mouth or nozzle can be increased, at the same time achieving a sharper formation of the drilling flame and a local concentration of the burnup, which results in the formation of a narrower one Firing channel and thus faster propulsion.
  • the reaction temperature can easily be reduced to temperatures below 1500 ° C. and the hot flame tip brought forward with respect to the nozzle, which means that there is no longer any danger of the pipe or nozzle material melting.
  • Common fire and oxidation resistant materials such as asbestos, chamotte, sillimanite, magnesite, chromite are suitable as pipe and nozzle material.
  • the pipeline can be designed both as a rigid and as a flexible arrangement. In the latter case, the pipeline is brought down from the surface of the earth in an approximately vertical bore, then bent in accordance with the course of the coal seam on a support and deflection device 7 and driven forward as the burning progresses. It is generally sufficient to form only the front section of the pipeline, the length of which is determined by the intended length of the combustion channel.
  • the combustion channel is partly very smooth and clean on its inner surface and has a diameter which is only slightly larger than the outer diameter of the pipeline. Sometimes it is noticeably larger in diameter and also very rugged. The latter is the case when air is predominantly used as an oxidizing agent.
  • the former case corresponds to the use of oxygen, with propulsion speeds of several meters per hour being achieved.
  • the working direction is reversed with regard to the gas flows; i.e. the gasification products formed are then passed through the interior of the pipeline to the surface, while the gasification agents, including water - this optionally in the form of steam - are fed through the annular space .6 (FIG. 2).
  • the seam material surrounding the pipeline is possibly re-ignited at the beginning of the combustion channel 5, so that the burn-off front extends around the hole drilled into the coal seam by surface.
  • the gaseous reaction products escape from the combustion zone through the combustion channel and finally through the coaxial pipeline to Ubertage. This forms a cavern-like extension 8 of the combustion channel or around the borehole of Ubertage.
  • the method according to the invention avoids two major difficulties of the conventional procedure for underground gasification, in that it basically makes do with a drilling from the surface and the combustion channel technology by means of flame drilling does not depend on a predetermined porosity of the coal as a prerequisite for the combustion.
  • the process is therefore particularly suitable for the extraction of hard coal that is stored in large depths (1500 to 5000 m and possibly even deeper).
  • a hard coal cube with an edge length of about 10 cm is heated on its surface with a gas flame, whereby a depression of about 20 mm in diameter is formed.
  • An oxygen stream of 180 l / h, to which water vapor corresponding to 190 g / h liquid water is mixed, is passed into and out of this depression through a quartz glass nozzle with a clear width of 1 mm steered a distance of about 15 mm.
  • the coal glows incandescent at the bottom of the depression. The part of the depression near the surface appears in a lighter to darker red.
  • the pipeline with the nozzle is slowly and steadily lowered into the resulting combustion channel. After 6 minutes, the entire length of the coal block is pierced.
  • the combustion channel is very smooth on its wall and has only a slightly larger diameter (about 10 mm) than the nozzle or the pipe. The quartz nozzle remains undamaged under these operating conditions.
  • Example 2 Operation in the same manner as in Example 1. Instead of oxygen, 900 l / h of air are added as the oxidizing agent, which is mixed with 200 g / h of water in the form of steam. After about 1/4 hour, the coal block is pierced. The hole created is irregular and jagged in the wall. The diameter of 20 to 25 mm is much larger than when burning with an oxygen flame.
  • the bore is lined with a steel tube up to the seam.
  • a further steel pipeline with a clear width of 100 mm runs in this pipe, which ends at the lower end in a flexible hose made of asbestos mesh and ends with a ceramic nozzle made of chamotte.
  • a deflection device in the seam according to FIG. 1 directs the nozzle opening against the coal.
  • a bundle of rolled saltpeter paper ignited above ground is transported through the inner pipeline to the underground. The burning bundle not only moves in free fall, but is accelerated by the combustion gases escaping at the top.
  • the burning bundle After a few seconds the burning bundle has reached the coal pile, whereby the coal is immediately heated on the surface.
  • the oxygen of several cubic meters per hour flowing in through the inner pipe at the same time creates a directed flame that forms a depression.
  • the oxygen is increased to 600 m 3 / h every hour and steam is also added to the oxygen stream at 475 kg / h.
  • the deflected pipeline can be ge speed of about 10 m / h are sunk or advanced into the combustion channel.
  • An amount of gas of about 3000 m 3 escapes from the well every hour .
  • the gas shows the following composition and has a calorific value of about 2570 kcal / Nm 3 .
  • Example 3 After two hours of stationary operation according to Example 3, the pipeline advanced has created a combustion channel of approximately 20 m in length. Now, after flushing the entire gas path with nitrogen, the direction of flow of the gases is reversed. As a result, the burn-off front shifts in the direction of the beginning of the combustion channel, so that in general no renewed ignition of the surface is necessary.
  • the oxidation mixture now introduced through the annulus of the well is slowly increased to about 1500 m 3 / h oxygen and 1200 kg / h steam. Approximately 7500 m 3 / h gas of comparable analysis and calorific value as in Example 3 now flow from the pipeline every hour.
EP85102572A 1984-03-14 1985-03-07 Procédé de gazéification souterraine de charbon Withdrawn EP0155598A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843409245 DE3409245A1 (de) 1984-03-14 1984-03-14 Verfahren zur untertaegigen vergasung von kohle
DE3409245 1984-03-14

Publications (1)

Publication Number Publication Date
EP0155598A2 true EP0155598A2 (fr) 1985-09-25

Family

ID=6230407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102572A Withdrawn EP0155598A2 (fr) 1984-03-14 1985-03-07 Procédé de gazéification souterraine de charbon

Country Status (4)

Country Link
EP (1) EP0155598A2 (fr)
AU (1) AU4009485A (fr)
DE (1) DE3409245A1 (fr)
ZA (1) ZA851869B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2469019A1 (fr) 2010-12-21 2012-06-27 Linde AG Procédé pour la gazéification souterraine du charbon
WO2012109711A1 (fr) * 2011-02-18 2012-08-23 Linc Energy Ltd Allumage d'une veine de charbon souterraine dans un processus de gazéification de charbon souterrain (ucg)
US20140056646A1 (en) * 2012-08-21 2014-02-27 George Anthony Aulisio Apparatus and method for mining coal
CN107558983A (zh) * 2017-10-23 2018-01-09 河南理工大学 煤炭地下气化同轴管道装置及其气化方法
CN116804361A (zh) * 2023-06-26 2023-09-26 中国矿业大学(北京) 覆岩分层温度监测方法、系统、电子设备及存储介质

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2469019A1 (fr) 2010-12-21 2012-06-27 Linde AG Procédé pour la gazéification souterraine du charbon
WO2012109711A1 (fr) * 2011-02-18 2012-08-23 Linc Energy Ltd Allumage d'une veine de charbon souterraine dans un processus de gazéification de charbon souterrain (ucg)
CN103380266A (zh) * 2011-02-18 2013-10-30 领潮能源有限公司 在煤炭地下气化过程ucg中点燃地下煤层
US20140056646A1 (en) * 2012-08-21 2014-02-27 George Anthony Aulisio Apparatus and method for mining coal
US8882204B2 (en) * 2012-08-21 2014-11-11 George Anthony Aulisio Apparatus and method for mining coal
US9540929B2 (en) 2013-03-20 2017-01-10 George Anthony Aulisio Apparatus and method for storing waste material
CN107558983A (zh) * 2017-10-23 2018-01-09 河南理工大学 煤炭地下气化同轴管道装置及其气化方法
CN107558983B (zh) * 2017-10-23 2023-10-13 河南理工大学 煤炭地下气化同轴管道装置及其气化方法
CN116804361A (zh) * 2023-06-26 2023-09-26 中国矿业大学(北京) 覆岩分层温度监测方法、系统、电子设备及存储介质
CN116804361B (zh) * 2023-06-26 2023-12-12 中国矿业大学(北京) 覆岩分层温度监测方法、系统、电子设备及存储介质

Also Published As

Publication number Publication date
DE3409245A1 (de) 1985-09-19
AU4009485A (en) 1985-09-19
ZA851869B (en) 1985-11-27

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Inventor name: WISSEROTH, KARL, DR.