CN203702120U - Gasifying device adopted by underground gasifying method of hydrocarbon-contained ore stratum - Google Patents

Abstract

The utility model belongs to a reprocessing device for an underground ore stratum and particularly relates to a gasifying device which is adopted by an underground gasifying method of a hydrocarbon-contained ore stratum. The gasifying device comprises at least two producing wellbores (1) and at least one gas-discharging barrel (9), wherein each producing wellbore (1) is provided with a vertical wellbore (2) and a horizontal wellbore (3) which penetrate through the underground ore stratum; electrodes (5) are respectively arranged in the vertical wellbore (2) and the horizontal wellbore (3) of each producing wellbore (1) and are used for heating a rock stratum; the current intensity of the electrodes (5) is greater than 80A; the horizontal wellbores (3) are distributed on the same plane in a pairwise symmetrical method. According to the gasifying device, the unit output rate of an obtained gaseous mixture can be increased, the expenses of the yield per unit are lowered, the cost of gasifying preparation work is low, and the rock-stratum heating speed is high.

Description

The gasification installation that the underground gasification method of hydrocarbonaceous ore bed adopts

Technical field

The utility model belongs to underground ore bed treating apparatus again, relate in particular to a kind of underground gasification device of hydrocarbonaceous ore bed, object is the hydrocarbon that solid-state organic matter is converted into the admixture of gas form that can gather, can be used for extraction hydrocarbon (hydrocarbon) the solid-state organic rock stratum (such as oil shale) from being rich in oily female form.

Background technology

It is female that oil shale contains organic matter oil, and it is mingled with in the mineral structure that intersperses among limestone or other mineral with the graininess of 20-140 μ m size.Extraction value depends on the energy amount of rock stratum, and the latter is depended on again the content that oil is female---generally in 5%-65%(percetage by weight) not etc.The efficiency of commercial mining to see can extract gaseous state with carrying of liquid state can material (such as the shale coal gas and the shale wet goods that there is higher thermal value and valuable industrial chemicals and be worth).The deposit mining that mineral buried depth is deeper than 50m gets up profitless, no matter because be well formula mining or surface mining expense is all very high, and, a large amount of raw material mineral that contain spoil are transported to to add the freight in building site also very high afterwards.Cost at a large amount of discarded objects of ground processing profit useless processing combustible mineral is also very considerable.Underground, the method for processing mineral at mineral burial ground can reduce costs, and improves the precious earning rate of carrying energy material of gained.

The thermal decomposition of oil shale---do not contacting the method for heat treatment mineral under Oxygen Condition-be that tool is promising economically, be exactly that then the system in accordance with regulations temperature that is heated to regulation is carried out constant temperature and left standstill, standing object is in shale heated perimeter, pyrolytic process fully to be completed.

That the technical scheme of applying for us in technical spirit with aspect being effective approaches the most is the method (WO 2005/010320 delivering according to 2005.02.03 of hydrocarbonaceous ore bed underground gasification, the patent NO.2349745 of the Russian Federation, application number: 2006101868/03,2004.04.14, priority US60/511,994,2003.10.16).This method comprises that at least boring two has (make it pass through subterranean strata) production boring and at least one gas-removing boring of a vertical level to pit shaft, and a vertical level of holing in production is arranged electrode in pit shaft; Heated formation; Steam---gas mist is also holed its derivation by gas-removing in extraction.

In known method, to cause fracture at least one times, make it cut off at least one or two production borings; In crack, arrange conductive material; Make two electrodes realize and contacting with conductive material; To two electrifying electrodes, electric current is passed through along crack, at least to pass through a part of conductive material, and at this moment discharge enough heat energy with realize (bottom line) a part of organic matter pyrolysis become extractible hydrocarbon (hydrocarbon).Section crack can be horizontal direction, vertical or longitudinally to boring.Conductive material can contain the casting resin with wedge, such as electroconductive cement.What conductive material served as is resistance heater.When electric current passes through along the resistance heater being made up of conduction material, electric energy energy transform into heat energy, and pass in rock stratum with heat exchange pattern.

In known method, the rock that contains large amount of organic is implemented to electric power heating.On-the-spot is by conductive material is imported containing the method in section crack, organic matter rock stratum and caused at the electric heater of use, and section crack, rock stratum is to adopt the result of so-called " hydrofracturing fault " to make.

In known method, what discharge that the required enough heat energy of pyrolysis leans on is the ratio resistance of conductive material, and this is associated with a large amount of preparation, comprises and manufactures fracturation and in crack, arrange conductive material.When electric current by time, just in rock stratum, produced resistance loss---Here it is thermal source.The shortcoming of this known method is: the unit output capacity of gained admixture of gas is lower, and the manufacturability that needs the high one-level manufacturing process of electric weight (application property) of process is not high.

Utility model content

The utility model is intended to overcome the deficiencies in the prior art part and a kind of unit output capacity that improves gained gaseous mixture is provided, reduce per unit area yield expense, gasification preparation cost is low, the gasification installation that the underground gasification method of the fast hydrocarbonaceous ore bed of rock stratum firing rate adopts.

For solving the problems of the technologies described above, the utility model is to realize like this.

The gasification installation that the underground gasification method of hydrocarbonaceous ore bed adopts, it comprises that at least two with passing underground ore bed vertical pit shaft and level production pit shaft and at least one gas-removing cylinder to pit shaft; In pit shaft, arrange electrode, heated formation in vertical pit shaft and the level of producing pit shaft.

As a kind of preferred version, the current strength of electrode described in the utility model is more than 80A.

Further, level described in the utility model is distributed on same plane with symmetry approach between two to pit shaft.

Further, the diameter of gas-removing cylinder described in the utility model is 350～450mm.

Further, the diameter of production pit shaft described in the utility model (1) is 50～550mm.

Further, the utility model is provided with sensor at described gas-removing cylinder place.

The utility model can improve the unit output capacity of gained gaseous mixture, reduces per unit area yield expense, and gasification preparation cost is low, and rock stratum firing rate is fast.

In hydrocarbon-containing formation underground gasification method.

---divide section heating means heated formation successively with the temperature difference.

---first temperature difference is divided the heating of section, is electric energy is applied to and is arranged on two electrodes producing in pit shaft horizontal wellbore.

---between electrode, excite and set up electric arc, until in boring top layer between electrode section produce thermal breakdown and the top layer of holing between electrode in form resistance heated passage.

---and dividing in the follow-up temperature difference rock stratum heating of carrying out in section, is to adopt the method that regulates current strength on electrode, and subtend ground is mobile simultaneously produces level in pit shaft to the electrode in pit shaft, translational speed be 1.0～2.5 meters/round the clock.

Generally speaking, these features have ensured to improve the output capacity of gained admixture of gas generally, have reduced unit consumption, have promoted the raising of production process technology, this is owing to having simplified gasification process, has reduced the economic cost of gasification preparation and has improved the firing rate of rock stratum simultaneously.

When first temperature difference is divided the heating of section, produce pit shaft level on two electrodes of pit shaft being electrically heated to be arranged in.Between two electrodes, excite and set up electric arc, start the temperature difference to distinguish paragraph heating, until occur thermal breakdown (being to raise fast and cause by two interpolar current strength) on boring top layer and form the resistance heated passage of two interpolars on boring top layer in rock stratum simultaneously.In the time there is thermal breakdown on boring top layer, just there is the thermal shock to organic matter particulate, this has caused the spalling rapidly of microburst and rock stratum, and this situation itself has improved the air permeability of rock stratum.In the resistance heated passage forming on boring top layer, start to have the electric current parallel with interpolar arc channel to pass through, make electrode melting, this has caused the electric arc extinguishing arc of two interpolars and has come from the closed and continuation resistance heated to rock stratum next of the arc discharge short circuit of sensing boring pit shaft conductive surface of electrode.On this section, owing to having formed high-temperature heating passage, in whole depth of stratum, rock stratum heating intensity is strengthened, and thermal decomposition process is strengthened, and has just reduced unit consumption and the unit output capacity that has improved gained admixture of gas accordingly.

Those temperature difference are afterwards divided on sections, when the heating of rock stratum, adopt the way that regulates current strength on electrode, and subtend moves the electrode of producing in pit shaft horizontal wellbore simultaneously, translational speed be 1.0～2.5 meters/round the clock.At this moment to the current capacity parameter examinations on physical parameter and the electrode of the vapour-gas mixture of deriving.

So, be not all to have stood heating in the whole rock stratum that produces pit shaft and produce between pit shaft, but having formed that temperature difference division section of resistance heated, two interpolar boring top layers stand heating.So just eliminate the thermal losses to bulk rock mass causing owing to ceaselessly heating whole rock stratum---as the sight occurring in prototype method, thereby shorten the time of obtaining target product (steam and gas mixture body), strengthen thermal decomposition process, reduce to greatest extent the setting power of electric energy, reduced accordingly unit consumption and the unit output capacity that has improved gained mist.

Allow electric current directly divide section and it is directly heated by the temperature difference of rock stratum, and limited boring top layer is used as to heat-dissipating passage (thermal breakdown occurs on limited top layer and form resistance heated passage), so just need not utilize conductive material to build heat-dissipating passage, also just conductive material need not be imported and is arranged on (as existing method) among boring, also strengthen thermal decomposition process, thereby just reduced unit consumption, improve the unit output capacity of made mist.

Create electric arcs to excite the heating to rock stratum to being arranged in two production pit shaft levels to two electrode application voltage of pit shaft, guaranteed to realize to the temperature difference and divided section pulsed by the principle that quantitatively applies heat effect.At this moment, if than resistance and inharmonious from the concurrent heating power of power supply, will change heating cycle.Therefore to move opposite to each other two and produce pit shaft levels and carry out rock stratum heating to the electrode in pit shaft (speed be 1.0～2.5 meters/round the clock), simultaneously to deriving current capacity parameter examinations on the physical parameter of mist and electrode.

So complete the method, gained gaseous mixture unit output capacity is improved, unit consumption is minimized, and has promoted again the raising of production process technology simultaneously.

Experiment is found out: the simultaneously mobile opposite to each other electrode in pit shaft horizontal wellbore (translational speed be 1.0～2.5m/ round the clock) of producing, and for improving gaseous mixture unit's productive rate, reduce unit consumption and promoting that the raising of production process technology is Optimal action.

Applying electric current more than 80A to electrode, is also the best system through testing the application's (patent) method of having found out, and it has also ensured the raising of gained mist unit productive rate and the reduction of unit consumption, has promoted the raising of production process technology simultaneously.

Stepped heating is carried out in rock stratum, and electrode is all to reduce 10%～20% in the situation that and carry out in gaseous mixture derived quantity to next moved further at every turn, this has just been avoided the temperature difference of the rammell to fully completing pyrolytic reaction to divide section carrying out ineffectual to no effect heating again.This has just strengthened pyrolytic process and has correspondingly reduced unit thermal losses, improve the unit productive rate of gained mist, owing to having simplified gasification process, the expense having reduced during gasification is prepared has improved again rock stratum firing rate, thereby has promoted the raising of production process technology simultaneously.

All levels of the production pit shaft by subterranean strata are to pit shaft, all be distributed between two in same plane Parallel Symmetric, this has just simplified the preparatory technology of drilling horizontal part pit shaft, has optimized the formation of boring skin resistance heat tunnel, has accelerated the ensuing current resistor heating in rock stratum.In the whole time that the level of the production pit shaft by subterranean strata is carried out in process to pit shaft, be all straightway as the ingredient of runoff system.

Owing to having formed the good condition of the gaseous reaction products of finding time, the pyrolytic process speed that the temperature difference is divided section has improved.The unit productive rate that this has just caused improving gained steam-gas mixture, has reduced unit consumption expense, and has facilitated the raising of production process technology.

The sum total of the above-mentioned feature of the technical program, has caused improving the unit productive rate of the mist that produces and has reduced unit consumption, has facilitated the raising of production process technology simultaneously, because simplified gasification process, has reduced economic cost, has accelerated rock stratum firing rate simultaneously.

Brief description of the drawings

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.Protection domain of the present utility model is not only confined to the statement of following content.

Fig. 1 is the functional system figure that underground gasification method is implemented in hydrocarbon-containiproducts rock stratum.

Fig. 2 is that temperature difference division section begins to take shape schematic diagram.

Fig. 3 is that the established temperature difference is divided section schematic diagram under the resistance heated system of shale rock stratum.

Fig. 4 is parameter and the thermal field schematic diagram that has formed temperature difference division section under the resistance heated system of shale rock stratum.

Fig. 5 is the not too thick rock stratum of combustible shale machining sketch chart.

In figure: 1, produce pit shaft; 2, vertical pit shaft; 3, level is to pit shaft; 4, combustible mineral subterranean strata; 5, electrode; 6, gas-removing cylinder; 7, sensor; 8, sensor; 9, gas-removing cylinder; 10, the temperature difference is divided section; 11, resistance heated passage; 12, thermal field isotherm; 13, the initial hot spot in working region.

Detailed description of the invention

Gasification installation shown in Figure 1, the underground gasification method of hydrocarbonaceous ore bed adopts, comprises that at least two with passing underground ore bed vertical pit shaft 2 and level production pit shaft 1 and at least one gas-removing cylinder 9 to pit shaft 3; In pit shaft 3, arrange electrode 5 in vertical pit shaft 2 and the level of producing pit shaft 1, with heated formation.

The current strength of electrode 5 described in the utility model is more than 80A.Level described in the utility model is distributed on same plane with symmetry approach between two to pit shaft 3.The diameter of gas-removing cylinder 9 described in the utility model is 350～450mm.The diameter of production pit shaft 1 described in the utility model is 50～550mm.The utility model is provided with sensor at described gas-removing cylinder 9 places.

The utility model hydrocarbonaceous ore bed underground gasification method comprises: get out from earth's surface and produce pit shaft 1, with the pending well section that vertically pit shaft 2 and level are led to solid-state combustible mineral subterranean strata 4 to the boring of pit shaft; In boring, arrange electrode 5, electrode is connected with AC power or the dc source on ground with cable.The energy loss causing for reducing space electric leakage towards periphery, electrode 5 configures by space cloth circuits, and sort circuit can ensure there is maximum density at the thermal field of rock stratum central authorities conductive region, is beneficial to form resistance heated passage in thermal field.Meanwhile, electrode 5 is arranged in level in pit shaft 3.The steam and gas mixture body making is derived by gas-removing cylinder 6.Gaseous mixture physical parameter adopts sensor 7 to detect, and sensor had both been arranged on the outlet of gas-removing cylinder 9(drawing-off gas, on ground), be also arranged on gas-removing cylinder 6(drawing-off gas entrance, in rock stratum).Current capacity parameter on electrode 5 is measured with sensor 8.Dividing the section method of carrying out successively by the temperature difference heats rock stratum.

In practice, the embodiment of underground gasification method is as described below.

To analyzing about position, mineral rock stratum, buried depth in geological prospecting, also to analyze the physical-chemical characteristic of ore bed, carry out technical and economic evaluation, the distribution in the boring group group hole as pending mineral deposit hole-drilling system element of construction is made decision.Kong Qun produces above pit shaft 1 by 1 or 6,2 or 2, more central gas-removing cylinder and is formed.Fig. 1 shows hydrocarbon-containiproducts (hydrocarbon) ore bed and implements underground gasification method function system.

The vertical pit shaft 2(that drills through production pit shaft 1 leads to the temperature difference division section 10 of subterranean strata) and gas-removing cylinder 6.The purposes of gas-removing cylinder is that the hydrocarbon (steam-gas mixture) having gasified in pyrolytic process is drawn into earth's surface.The degree of depth of jewel hole is determined according to the buried depth of combustible shale.The diameter of gas-removing cylinder 6 is 350～450mm.

Get out the level of producing pit shaft 1 to pit shaft 3, in order to ore bed that electrode 5 is led, the logical underground ore bed temperature difference of pit shaft is divided section 10.Produce spudding in of pit shaft 1 and a little will leave gas-removing cylinder 6 along processing ore bed calculated direction.The spacing of wells is specified by technology Calculation data from (from 10m).Produce pit shaft 1 diameter from 50mm to 550mm.All levels of the production pit shaft 1 passing through in underground ore bed are symmetry shape between two to pit shaft 3 and are distributed in same plane.

Complete gas-removing cylinder 6 and the connection roadway (docking tunnel, engages tunnel) of producing pit shaft 1, in order to form the down-hole passage that can determine ore bed processing direction.Determine the connection roadway point of boring, set it as initial hot spot and form first temperature difference the starting point of dividing section 10.

By producing pit shaft 1 iontophoresis electrode 5, and along established level to pit shaft 3 traveling electrodes until the starting point that the most initial hot spot and first temperature difference of formation are divided section 10.

From producing that the vertical pit shaft 2 of pit shaft 1 packs electrode into and along the level of producing pit shaft 1 to pit shaft 3 traveling electrodes to initial heating point with form first temperature difference division section 10 starting points and can adopt any one known method, such as, be equipped with " skirt " formula structure (in order to the gap between closed electrode and shell and vertical pit shaft 2 inwalls) of being made by the tough and tensile flexible material such as oilcloth, canvas, the way then promoting by atmosphere overbottom pressure to electrode 5.Again electrode 5 along level to pit shaft 3 and then deliver to and the abutment of gas-removing cylinder 6." skirt " structure is burned in the time that the temperature difference is divided section 10 initial heating, thereby can not hinder the next movement of electrode 5 along level to pit shaft 3.

Divide after the initial hot spot of section 10 with finding a place for the temperature difference at electrode, adopt gasket material to arrange top horizontal position to carry out clamping sealing producing boring at ore bed.

After completing these preparatory operations, adopt any known method to light interpolar electric arc and carry out electrical breakdown (high voltage pulse method, by oscillator high-frequency discharge method etc.) to producing pit shaft 1, complete the initial heating of the temperature difference in rammell being divided to section 10.If the electrical power on electrode 5 significantly raises rapidly, just electric arc has been produced in judgement.Current strength is stabilized in the level of regulation (more than 80A), stablizes the starting the arc with this.The electric arc forming is just rapidly to interelectrode space heating.

The conditions at the arc that obtained are maintained to a few hours, and object is to heat the level of producing pit shaft 1 to pit shaft 3 surfaces, divides section 10 make the level of producing boring reach 700-900 DEG C to the temperature of well bore face in first temperature difference.Produce heating power and puncture when the level of producing pit shaft 1 reaches said temperature to well bore face, consequently formed combustible shale conductive layer---the ratio resistance value of top layer shale is during just from 100 Ω m(700 DEG C) while dropping to 0.025 Ω m(900 DEG C).

Electric arc in inter-electrode space and the level between the electrode of pit shaft 1 of producing are to the redistribution (when resistance heated again heating power puncture form) that has occurred electrical power between pit shaft resistance heated initial point.This is to have caused from electrode 5 to producing the level of pit shaft 1 to the condition of the barrel " flying fox " (sudden strain of a muscle road) of pit shaft 3, and in rock stratum, form following conductive channel, " electrode---electric arc---horizontal well barrel---electric arc---electrode " and " electrode---changing-over contact---horizontal barrel---changing-over contact---electrode ", these two conductive channels have caused again ore bed resistance heated passage between electrode 5.On the electrode of implemented stabling current intensity system, decline and record forming of conductive layer by electrical power.

In established resistance heated passage, " electric arc " component is changeless, for no other reason than that electrode 5 and production pit shaft 1 level are changeless to the distance between pit shaft 3 barrels.

When producing pit shaft 1 level while having formed resistance heated to pit shaft 3 top layers between electrode, just complete first temperature difference and divided the preliminary heating in section 10.

The temperature difference divide section 10 from 0.1m3 to 1m3 within the scope of preliminarily heated time span be several hours not etc., divide the length of section 10 sizes and the parameter of selected electric system depending on the selected temperature difference.

Next, under burning voltage system, continue to pull open electrode 5.Between production pit shaft 1, level is to the high temperature (700-900 DEG C) of the lip-deep conductive channel of pit shaft 3 barrel (being the resistance heated passage between electrode 5), ensured the required temperature reaching of shale ore bed heating (on shale ore bed border 460 DEG C-490 DEG C), this temperature is enough carried out the pyrolytic process of combustible shale in the temperature difference is divided the gamut of section 10.Combustible shale pyrolytic process causes generating gasification product, and---mixture of hydrocarbon and hydrogen, carbon monoxide, water vapour---is so-called mist, the target product of this method that Here it is.The temperature difference divide sign that the formation of section 10 finished be mist extraction amount sharply decline and gas-removing cylinder 6 in the mixture pressure amount decline 10-20% that especially mist can be derived that declines rapidly.In other words, in the temperature limit of temperature difference division section 10, pyrolytic process completes, and the organic matter in this partial section fully decomposes.

In open type stratum, process ore bed and be the temperature difference and divide the not boundary clearly of distribution of the thermal field of section 10, this has caused many growth parallel, start from combustible shale and heat successively (rock mass, naturally burying the temperature approach of temperature to temperature difference division section 10 interior regulations from it), end in volatilization process and the female pyrolytic reaction process of oil of fugitive constituent.

Shown in Fig. 2 is that temperature difference division section begins to take shape schematic diagram, and Fig. 3 shows the established temperature difference under shale ore bed resistance heated system and divides section schematic diagram.Thermal field schematic diagram and shale ore bed form the parameter display of temperature difference division section in Fig. 4 under resistance heat system.H is shale depth of stratum.The thermal field nominal circle Xian – working range boundary of D2 – pyrolytic reaction; D-electrode diameter; D1 – electrode electrode circle diameter; B – interelectrode distance.

For each process time is arranged, ore bed adds thermal recovery to carry out temperature difference division section 10 to pit shaft 3 successively along the level of producing pit shaft 1.At this moment, pull open in the opposite direction electrode 5, pull open along two horizontal wellbores 3 of producing pit shaft 1, pull open from gas-removing cylinder 6 other initial heating points the direction that level exports to pit shaft 3.Electrode 5 does movement like this with optimum speed, has ensured the controllable orderly development of each process and replacement---mineral heating, and water evaporates, fugitive constituent is separated out, and organic moiety (oily female) decompose, and generates hard pitch, shale tar volatilization and production semicoke.

Electrode 5 mobile optimum speed in horizontal wellbore is determined by experiment, be 1.0～2.5m/ round the clock.

The data that draw in the test with various friction speed traveling electrodes 5 in table 1, are listed.

The efficiency of giving vent to anger of gas-removing cylinder, by the ratio calculation of the actual gas output of gas-removing cylinder and best gas output, unit is %.

The monitoring of the physical parameter to the mist of deriving, adopts the sensor 7,8 that is arranged on gas-removing cylinder 6 entrances and gas-removing cylinder 9 exits to measure.The current capacity parameter sensor 8 that leads to electrode 5 is measured.The temperature of gas-removing cylinder 6 gaseous mixture out should be not less than 200 DEG C-210 DEG C, should be not less than 220 DEG C-260 DEG C in the temperature of gas-removing cylinder 6 entrance.

According to the temperature of gas-removing cylinder 9 exit mists, determine the temperature in (calculating) temperature difference division section, the scope of this section, revises the speed that electrode 5 moves, and object is the mist gas output that increases gas-removing cylinder 9.

Table 1.

From table 1, data can be found out, when electrode 5 pulls open speed lower than optimum value (as 1,2), can reduce the mist production capacity of process, and this is just ore bed have been heated because there is no comhustible component in rock stratum.

If when the speed that electrode 5 pulls open is greater than optimum value (such as 9,10), can make to generate in rock stratum unreacted oil female residual, also can reduce output capacity, when this is because still has comhustible component in rock stratum, the temperature difference is divided section and has been shifted.

Electrode 5 mobile optimum speed in horizontal wellbore be 1.0～2.5 meters/round the clock.

The chemical energy Integrated Processing Facility of delivering to ground by 6 extractions of gas-removing cylinder by pyrogenically prepared mist does further processing.

When the gaseous mixture scale of construction decline 10-20% of output, be electrode to next moved further once.In the process of process, each passage of exhaust system is all being grown.First factor that exhaust system is grown is that the boring line segment that electrode 5 is between the gas-removing cylinder 6 outside one end and the temperature difference division section 10 in temperature difference division section 10 is disconnected.It is because the female decomposition of oil has formed the miniature rill that is of a size of 20-140 μ m in the hole of mineral result that the second factor coming is expanded in the temperature difference division inner pyrolytic process of section 10 boundary line.These two factors have promoted pyrolytic process activation, and this is because reduced in the dividing potential drop of temperature difference division section 10 reaction product.

According to the data that record in gas-removing cylinder 6 entrance, draw out temperature and the temperature difference herein and divide the graph of relation of section to gas-removing hole spacing.The cooling of mist is the mark of termination of procedure.When the temperature difference divide initial bit that section 10 moves away gas-removing cylinder 6 be equipped with very large apart from time, the temperature drop of mist also can be very large, on certain distance between the two, the temperature of gas-removing cylinder 6 entrance mists will be lower than the condensation point temperature of shale oil higher boiling heavy component (160 DEG C-190 DEG C).In the time that the temperature of gas-removing cylinder 6 entrance gaseous mixtures drops to 260 DEG C-220 DEG C, pyrolytic process should finish, so that the unlikely condensation of thickness hydrocarbon of the output that makes to gasify.

With regard to the thermal system motive force of development with want with regard to heat treated mineral composition, low temperature pyrogenation is close to the roasting technique (550 DEG C-900 DEG C) of ceramics, and this has just caused an important ecological result---retain the massif underground structure of bulky.

The number of recoverable mist quantity, depends on the translational speed of the electrode 5 being specified by temperature schedule, the condition of carrying out (thermal power and ore bed buried depth) of shale actual characteristic and process.

For improving the gaseous mixture output of boring, a gas-removing cylinder 6 can be born several production pit shafts 1, is that it distributes according to the definite mode of ore bed geometry around gas-removing cylinder 6.Can be two and produce pit shaft 1 in the 6 different directions being aligneds distributions of gas-removing cylinder, can be that four production pit shafts 1 are the distribution of right-angled intersection formula or radioactive ray formula radiation profiles etc. centered by gas-removing cylinder 6 taking gas-removing boring as intersection point.

A possible scheme of this method of industrial realization is shown in Fig. 5, has shown the processing handling process of not too thick rammell in figure.Wherein A-leading electrode direction; The technique moving direction of B-electrode.The initial hot spot in 13-working region.

This patent application method has realized the commercial Application with a complete set of equipment, and this has proved the industrial significance of this method.

The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims (6)

1. the gasification installation that the underground gasification method of hydrocarbonaceous ore bed adopts, is characterized in that, comprises that at least two with passing underground ore bed vertical pit shaft (2) and level production pit shaft (1) and at least one the gas-removing cylinder (9) to pit shaft (3); In pit shaft (3), arrange electrode (5) in vertical pit shaft (2) and the level of producing pit shaft (1), with heated formation.

2. the gasification installation that the underground gasification method of hydrocarbonaceous ore bed according to claim 1 adopts, is characterized in that: the current strength of described electrode (5) is more than 80A.

3. the gasification installation that the underground gasification method of hydrocarbonaceous ore bed according to claim 2 adopts, is characterized in that: described level is distributed on same plane with symmetry approach between two to pit shaft (3).

4. the gasification installation that the underground gasification method of hydrocarbonaceous ore bed according to claim 3 adopts, is characterized in that: the diameter of described gas-removing cylinder (9) is 350～450mm.

5. the gasification installation that the underground gasification method of hydrocarbonaceous ore bed according to claim 4 adopts, is characterized in that: the diameter of described production pit shaft (1) is 50～550mm.

6. the gasification installation that the underground gasification method of hydrocarbonaceous ore bed according to claim 5 adopts, is characterized in that: locate to be provided with sensor at described gas-removing cylinder (9).