CN111188594B - Old goaf coal slime water gas-liquid fluidized mining device and method - Google Patents
Old goaf coal slime water gas-liquid fluidized mining device and method Download PDFInfo
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- CN111188594B CN111188594B CN202010109619.1A CN202010109619A CN111188594B CN 111188594 B CN111188594 B CN 111188594B CN 202010109619 A CN202010109619 A CN 202010109619A CN 111188594 B CN111188594 B CN 111188594B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 199
- 239000003245 coal Substances 0.000 title claims abstract description 144
- 239000007788 liquid Substances 0.000 title claims abstract description 35
- 238000005065 mining Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 105
- 239000000047 product Substances 0.000 claims abstract description 22
- 239000012263 liquid product Substances 0.000 claims abstract description 6
- 238000002474 experimental method Methods 0.000 claims description 20
- 238000005243 fluidization Methods 0.000 claims description 19
- 230000001276 controlling effect Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000003034 coal gas Substances 0.000 claims description 6
- 239000003250 coal slurry Substances 0.000 claims description 6
- 239000003077 lignite Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000010963 304 stainless steel Substances 0.000 claims description 3
- 241001270131 Agaricus moelleri Species 0.000 claims description 3
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 3
- 239000003129 oil well Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000012945 sealing adhesive Substances 0.000 claims description 3
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 2
- 239000003830 anthracite Substances 0.000 claims description 2
- 238000004939 coking Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims 2
- 230000008018 melting Effects 0.000 claims 2
- 238000011160 research Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 32
- 239000012943 hotmelt Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013401 experimental design Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- -1 steam Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
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- E—FIXED CONSTRUCTIONS
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- E21B—EARTH OR ROCK 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
- E21B43/34—Arrangements for separating materials produced by the well
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
The invention discloses a device and a method for gas-liquid fluidized mining of coal slime water in an old goaf. The device comprises a superheated steam device, a coal slime water liquefaction conversion device, a gas liquefaction product collection device and a control device, wherein the control device comprises a temperature control device, a pressure and temperature coordination device and a computer; the superheated steam device consists of a water tank, a water supply pipeline, a heater and a steam pipeline; the coal slime water gas-liquid conversion device comprises a coal slime water gas-liquid conversion box, the gas-liquid product collection device comprises an oil collection device and a mixed gas collection device, the temperature control device is positioned in the heater, the pressure control device is positioned in the coal slime water gas-liquid conversion box, and the temperature and pressure coordination device comprises an air pump; and the computer is connected with the coal slime water liquefaction conversion box and the heater. The invention takes old goaf coal slime water as a research object to realize a coal slime water-gas fluidized mining test under the conditions of given temperature, given pressure and given coal level.
Description
Technical Field
The invention belongs to the technical field of coal-to-liquid and coal-to-gas, and particularly relates to a device and a method for gas-liquid fluidized mining of coal slime water in an old goaf.
Background
Coal liquefaction, in which solid coal is hydrogenated under the combined action of a catalyst at a certain temperature and pressure to react, and the coal is directly converted into liquid oil. Is one of the important technologies of the high-efficiency clean utilization technology of coal.
Coal gasification, namely a synthesizer which thermochemically processes organic matters in coal and gasifying agents such as steam, air or oxygen at a certain temperature and pressure to convert solid coal into combustible gas such as CO, oxygen and methane and non-combustible gas such as carbon dioxide and nitrogen.
Due to the problems of coal mining technology, a large amount of residual coal, residual coal and Fe-containing coal exist in the old goaf3+，Fe2+，Cl-，Ca2+，SO4 2-，H+，OH-The waste water of plasma is mixed to form slime water, which causes waste of coal resources.
Therefore, research on a device and a method for gas-liquid fluidized mining of coal slime water in old goafs is urgently needed.
Disclosure of Invention
The invention aims to provide a device and a method for coal slime water gas-liquid fluidized mining in an old goaf, and aims to solve the problem of coal slime water resource waste. The invention takes old goaf coal slime water as a research object to realize a coal slime water-gas fluidized mining test under the conditions of given temperature, given pressure and given coal level.
The invention provides a device for coal slime water gas-liquid fluidization mining in an old goaf, which comprises a superheated steam device, a coal slime water gas-liquid fluidization conversion device, a gas-liquid product collection device and a control device, wherein the control device comprises a temperature control device, a pressure and temperature coordination device and a computer.
The superheated steam device consists of a water tank, a water supply pipeline, a heater and a steam pipeline; the water tank is a 5-ton vertical flat-top stainless steel cylindrical water tank with the size of phi 1790 x 2350 (mm), and is provided with a water inlet positioned at the center of the top and a water outlet positioned 20 cm away from the bottom, wherein the nominal diameter of the water inlet is 4 cm, and the nominal diameter of the water outlet is 4 cm. The water inlet is connected into a water supply device through a hot-melt PE pipe with the diameter of 4 cm, and the water outlet is connected into a heater through a hot-melt PE pipe with the diameter of 4 cm; the steam pipeline is a 304 stainless steel corrugated pipe, one end of the steam pipeline is connected with the heater, and the other end of the steam pipeline is connected with the coal slime water liquefaction conversion box; the heater heats water from the water tank into steam of 200-1200 ℃, and the steam is sent into the coal slime water liquefaction conversion tank through a steam pipeline. The heater can control the temperature of steam to be 200-1200 ℃, and can control the flow of the steam to be 0-200 mL/min.
The coal slime water-gas liquefaction conversion device is composed of a coal slime water-gas liquefaction conversion box, and the coal slime water-gas liquefaction conversion box is composed of a box cover and a box body. The box cover and the box body are made of stainless steel, the size is 150 x 100 (mm), the box cover and the box body are tightly connected through four high-strength 8.8-grade galvanized outer hexagon bolts, and the box cover and the box body are high-temperature-resistant, high-pressure-resistant, heat-insulating and sealed. The coal slime water liquefaction and conversion box is internally composed of a constant temperature layer, a temperature sensor, a pressure sensor, a reading display and a control switch; the coal slime water liquefaction conversion box provides a reaction site and collects temperature and pressure parameters, and the parameters are transmitted to a computer, analyzed and processed by the computer and then control a temperature and pressure controller, so that the required temperature and pressure conditions are achieved and maintained;
the gas-liquid product collecting device comprises an oil pump, an oil-water separator, an oil tank, a dryer and a gas tank. The coal slime water liquefaction conversion box is sequentially connected with an oil pump, an oil-water separator and an oil tank through an oil pipeline, and the oil pipeline is positioned at the bottom of the coal slime water liquefaction conversion box; the oil pump is an SB-1 type electric oil well pump, and pumps oil generated in the coal slime water liquefaction conversion tank to the oil-water separator; the oil-water separator can separate oil from water, one end of the oil-water separator is connected with the oil pump through an oil conveying pipeline, and the other end of the oil-water separator is connected to the oil tank through an oil conveying pipeline; the oil tank can collect oil; the inner surface of the oil pipeline can resist 40Mpa and 1400 ℃, and the outer surface has no requirement;
the coal slime water liquefaction conversion box is sequentially connected with an air pump, a dryer and an air tank through an air exhaust pipeline, and the air exhaust pipeline is positioned above the liquid level of the coal slime water liquefaction conversion box; the air pump is an R400 laboratory air pump and can pump out coal gas in the coal slime water liquefaction conversion tank; the dryer can absorb water in the coal gas, one end of the dryer is connected with the air pump through an air conveying pipeline, and the other end of the dryer is connected with the air tank through an air conveying pipeline. The joints of the experimental device in this section are provided with a 40 MPa-resistant 1400 ℃ combined pad and a sealing adhesive tape, and the whole pipeline, the wear-resistant pipelines at each valve and the 40 MPa-resistant 1400 ℃ sealing joints are arranged. The inner surfaces of the air exhaust pipeline and the air transmission pipeline need to resist 40Mpa and 1400 ℃, and the outer surfaces do not need;
the temperature control device consists of a temperature sensor and a temperature controller. The temperature sensor is arranged in the coal slime water liquefaction conversion box and has the function of measuring the average temperature of the coal slime water in the box; the temperature controller is used for controlling the temperature by controlling the heater to control the steam temperature and the steam flow. The temperature controller is used for controlling the temperature by controlling the heater to control the steam temperature and the steam flow; the temperature controller controls the temperature of steam generated by the heater, controls a valve in the heater and automatically controls an opener in the air pump;
the pressure control device consists of a pressure sensor and a pressure controller. The pressure sensor is arranged in the conversion box and has the function of measuring the average pressure of the slime water; the pressure controller is used for controlling the pressure by controlling a control valve in the heater;
the temperature and pressure coordination device comprises an air pump which automatically controls an opener. The temperature and pressure coordination device has the functions that when the temperature is lower than the set temperature, low-temperature gas in the conversion box is dynamically extracted, the amount of high-temperature gas introduced into the heater is controlled, the pressure of the device is kept constant, and the temperature is regulated; the internal pressure controller of the coal slime water liquefaction conversion box controls the internal automatic air pump to control the opener;
the computer transmits instructions to comprehensively control the temperature and the pressure of the controller.
In the device, the air pump is an R400 laboratory air pump.
The invention provides a method for coal slime water gas-liquid fluidization mining in an old goaf, which is used for testing a conversion experiment of converting coal slime water into oil and mixed gas under the conditions that the given temperature is 200-1200 ℃, the given pressure is 5-20 Mpa and the given coal level is lignite, coking coal and anthracite, and emphasizing on the conversion experiment of converting the coal slime water into the oil and the mixed gas, wherein superheated steam can be introduced into a conversion chamber to realize an experiment environment with the temperature of 200-1200 ℃ and the pressure of 5Mpa-20Mpa in the conversion chamber, and a test of the conversion effect of the coal slime water.
The method comprises the following specific operation steps:
step one, determining an experimental scheme; the experimental material is from old goaf coal slime water with lignite as coal quality; controlling temperature and pressure by a computer to perform multiple groups of experiments;
step two, sample preparation; preparing coal slime water of 0.5 cubic meter for a sample;
step three, checking air tightness; connecting the experimental devices in sequence, generating a certain amount of steam through a heater, and judging the air tightness by observing the numerical value change of a pressure sensor on the coal slime water-gas liquefaction conversion box; if the pressure value is basically unchanged after 10 minutes, the air tightness is good;
step four, feeding materials; opening the conversion box, feeding materials, and tightly covering the conversion box; selecting whether to add a catalyst according to experimental requirements;
step five, starting equipment;
step six, setting temperature and pressure data; setting the pressure of 5 atmospheric pressures in the computer software and the temperature of 400 ℃ for carrying out experiments;
collecting a product; opening an oil pump and an air pump after 1 hour to collect a product;
step eight, collecting data; measuring and recording the mass of oil in the product and the volume of gas in the product;
step nine, taking out the sample after cooling;
and (5) sorting the data and processing the data.
The invention has the beneficial effects that:
the method takes old goaf coal slime water as a research object to realize a coal slime water gas-liquid fluidization mining test under the conditions of given temperature, given pressure and given coal level; the research shows that the coal slime water gas-liquid fluidization exploitation in the old goaf achieves the combination of the highest production efficiency under the temperature and the pressure under different coal qualities.
Drawings
FIG. 1 is a graph showing the change of the conversion rate of muddy water with temperature in example 1.
FIG. 2 is a graph showing the change of the conversion rate of muddy water with pressure in example 2.
FIG. 3 is a schematic view of the structure of the device of the present invention.
In the figure: 1 is a water tank, 2 is a water supply pipeline, 3 is a heater, 4 is a steam pipeline, 5 is a coal slime water liquefaction conversion box, 6 is an oil pumping pipeline, 7 is an oil pump, 8 is an oil pipeline, 9 is an oil-water separator, 10 is a second oil pipeline, 11 is an oil tank, 12 is an air pumping pipeline, 13 is an air pump, 14 is an air transmission pipeline, 15 is a dryer, 16 is a second air transmission pipeline, 17 is an air tank, 18 is a computer
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
The purpose of the experimental design is to convert coal slime water into oil and gasified products by using high-temperature and high-pressure steam.
As shown in fig. 3, the device for converting coal slime water into oil and mixed gas comprises a superheated steam device, a coal slime water liquefaction and conversion device, a gas-liquid product collection device, a temperature control device, a pressure and temperature coordination device and a computer.
The superheated steam device consists of a water tank 1, a water supply pipeline 2, a heater 3 and a steam pipeline 4. A water inlet of the water tank 1 is connected to a water supply device through a hot-melt connection water supply pipeline 2, and a water outlet of the water tank is connected to a heater 3 through the hot-melt connection water supply pipeline 2; one end of the steam pipeline 4 is connected with the heater 3, and the other end of the steam pipeline is connected with the coal slime water liquefaction and conversion device;
the coal slime water-gas liquefaction conversion device comprises a coal slime water-gas liquefaction conversion box 5, and the coal slime water-gas liquefaction conversion box consists of a box cover and a box body; the coal slime water liquefaction and conversion box 5 is internally composed of a constant temperature layer, a temperature sensor, a pressure sensor, a reading display and a control switch; the coal slime water liquefaction conversion box provides a reaction site and collects temperature and pressure parameters, and the parameters are transmitted to a computer, analyzed and processed by the computer and then control a temperature and pressure controller, so that the required temperature and pressure conditions are achieved and maintained;
the gas-liquid product collecting device comprises an oil collecting device and a mixed gas collecting device, wherein the oil collecting device comprises an oil pump 7, an oil-water separator 9 and an oil tank 11, and the mixed gas collecting device comprises an air pump 13, a dryer 15 and an air tank 17; the coal slime water liquefaction conversion box is connected with an oil pump 7 through an oil pumping pipeline 6, the oil pump 7 is connected with an oil-water separator 9 and an oil tank 11 through an oil conveying pipeline 8, and the oil pumping pipeline is positioned at the bottom of the coal slime water liquefaction conversion box; the oil pump 7 is an electric oil pump and pumps oil generated in the coal slime water liquefaction conversion tank to the oil-water separator 9; the oil-water separator 9 can separate oil from water, one end of the oil-water separator is connected with the oil pump through an oil conveying pipeline, and the other end of the oil-water separator is connected to the oil tank through an oil conveying pipeline; the oil tank 11 can collect oil; the inner surface of the oil pipeline is resistant to 40MPa and 1400 ℃, and the outer surface of the oil pipeline has no requirement;
the coal slime water liquefaction conversion box is connected with an air pump 13 through an air pumping pipeline 12, the air pump 13 is connected with a dryer 15 and an air tank 17 through an air transmission pipeline 14, and the air pumping pipeline 12 is positioned above the liquid level of the coal slime water liquefaction conversion box; the air pump 13 can pump out coal gas in the coal slime water liquefaction conversion tank; the dryer 15 can absorb water in the coal gas, one end of the dryer is connected with the air pump through an air pipeline 14, and the other end of the dryer is connected with an air tank 17 through a second air pipeline 16; the inner surfaces of the air exhaust pipeline 12, the gas transmission pipeline 14 and the second gas transmission pipeline 16 need to resist 40Mpa and 1400 ℃, and the outer surfaces do not need to resist;
the temperature control device is positioned in the heater 3 and consists of a temperature sensor and a temperature controller; the temperature sensor is arranged in the coal slime water liquefaction conversion box and has the function of measuring the average temperature of the coal slime water in the box; the temperature controller is used for controlling the temperature by controlling the heater to control the steam temperature and the steam flow; the temperature controller controls the temperature of steam generated by the heater, controls a valve in the heater and automatically controls an opener in the air pump;
the pressure control device is positioned in the coal slime water liquefaction conversion box and consists of a pressure sensor and a pressure controller; the pressure sensor is arranged in the conversion box and has the function of measuring the average pressure of the slime water; the pressure controller is used for controlling the pressure by controlling a control valve in the heater;
the temperature and pressure coordination device comprises an air pump; the air pump is internally provided with an automatic control opener; the temperature and pressure coordination device has the functions that when the temperature is lower than the set temperature, low-temperature gas in the conversion box is dynamically extracted, the amount of high-temperature gas introduced into the heater is controlled, the pressure of the device is kept constant, and the temperature is regulated; the internal pressure controller of the coal slime water liquefaction conversion box controls the internal automatic air pump to control the opener;
and the computer 18 is connected with the coal slime water liquefaction conversion box and the heater, and comprehensively controls the temperature and the pressure of the controller through transmitting instructions.
The water tank 1 is provided with a water outlet which is communicated with a heater 3 through a water supply pipeline 2, the heater 3 heats water from the water tank 1 into steam, the steam enters a coal slime water liquefaction conversion box 5 through a steam pipeline 4, the high-temperature high-pressure steam and the coal slime water in the coal slime water liquefaction conversion box 5 are converted into oil and mixed gas, an oil product passes through an oil pumping pipeline 6 and an oil conveying pipeline 8 to reach an oil-water separator 9 under the action of an oil pump 7, the oil-water separator 9 separates the mixed product of the oil and the water, and the separated oil is stored in an oil tank 11 through a second oil conveying pipeline 10. The mixed gas product is conveyed to a dryer 15 through an air exhaust pipeline 12 and an air conveying pipeline 14 under the action of an air pump 13, the dryer 15 dries the mixed gas, and the dried mixed gas is stored in a gas tank 17 through a second air conveying pipeline 16.
The computer 18 sends instructions to the temperature controller, the control valve in the heater and the automatic start control device of the air pump through data transmitted back by the temperature sensor, and the temperature is dynamically controlled by the temperature controller.
The computer 18 sends instructions to the pressure controller, the control valve in the heater and the automatic start control device of the air pump through data transmitted back by the pressure sensor, and the pressure controller dynamically controls the pressure.
Furthermore, the 5-ton vertical flat-top stainless steel cylindrical water tank with the water tank size of phi 1790mm 2350mm is provided with a water inlet positioned at the center of the top and a water outlet positioned 20 cm away from the bottom, wherein the nominal diameter of the water inlet is 4 cm, and the nominal diameter of the water outlet is 4 cm.
The water supply pipeline is a PE pipe with the diameter of 4 cm, and the steam pipeline is a 304 stainless steel corrugated pipe.
The heater heats water from the water tank into steam of 200-1200 ℃, and the steam is sent into the coal slime water liquefaction conversion tank through a steam pipeline; the heater can control the temperature of steam to be 200-1200 ℃, and can control the flow of the steam to be 0-200 mL/min;
the box cover and the box body of the coal slime water liquefaction conversion box are made of stainless steel, the size of the box cover and the box body is 150mm 100mm, the box cover and the box body are tightly connected through four high-strength 8.8-grade galvanized outer hexagon bolts, and the box cover and the box body are high-temperature-resistant, high-pressure-resistant and heat-insulating and sealed.
The air pump is an R400 laboratory air pump. The oil pump is an SB-1 type electric oil well pump.
The joints of the coal slime water liquefaction conversion box, the steam pipeline, the oil pipeline and the gas pipeline are provided with a 40 Mpa-resistant 1400 ℃ resistant combined gasket and a sealing adhesive tape, and the whole pipeline and each valve are provided with a wear-resistant pipeline and a 40 Mpa-resistant 1400 ℃ resistant sealing joint.
Example 1
The device for coal slime gas-liquid fluidization mining in the old goaf is applied to carry out the experiment of the coal slime water conversion efficiency at different temperatures, and the experiment steps are as follows:
step one, determining an experimental scheme; the experimental pressure is assumed to be 5 atmospheric pressures, no catalyst is added, and the experimental material is from old goaf coal slime water with lignite as coal. Multiple sets of experiments were performed with computer controlled temperature.
Step two, sample preparation; a sample is prepared with 0.5 cubic meter of coal slurry water.
Step three, checking air tightness; the experimental device is connected in sequence, a certain amount of steam is generated through the heater, and the air tightness is judged by observing the numerical value change of the pressure sensor on the coal slime water liquefaction conversion box. The airtightness was good if the value of the pressure was substantially unchanged after 10 minutes.
Step four, feeding materials; and opening the conversion box, feeding the materials, and tightly covering the conversion box.
And step five, starting the equipment.
Step six, setting temperature and pressure data; the experiment was carried out with a pressure of 5 atmospheres and a temperature of 400 ℃ set in the computer software.
Collecting a product; after 1 hour, the oil and air pumps were opened to collect the product.
Step eight, collecting data; the mass of oil in the product and the volume of gas in the product were measured and recorded.
Step nine, taking out a sample; and taking out the sample after cooling.
And finishing the experiment for measuring the conversion efficiency of the slime water at 400 ℃.
And carrying out a plurality of groups of experiments on the coal slime conversion efficiency of coal slime gas-liquid fluidization exploitation of the coal slime water in the old goaf at the temperature of 200-.
And (5) sorting the data and processing the data.
FIG. 1 shows a graph of the change of the conversion rate of the coal slurry water with temperature in the embodiment, and it can be seen from the graph that the gas-liquid fluidization mining of the coal slurry water in the old goaf has the best conversion efficiency at 600-800 ℃.
Example 2
The device for coal slime gas-liquid fluidization mining in the old goaf is applied to carry out the coal slime water conversion efficiency experiment under different pressures, and the experiment steps are as follows:
step one, determining an experimental scheme; the experimental temperature is assumed to be 400 ℃, no catalyst is added, and the experimental material is from old goaf coal slime water with lignite as coal quality. The pressure was controlled by a computer to perform multiple sets of experiments.
Step two, sample preparation; a sample is prepared with 0.5 cubic meter of coal slurry water.
Step three, checking air tightness; the experimental device is connected in sequence, a certain amount of steam is generated through the heater, and the air tightness is judged by observing the numerical value change of the pressure sensor on the coal slime water liquefaction conversion box. The airtightness was good if the value of the pressure was substantially unchanged after 10 minutes.
Step four, feeding materials; and opening the conversion box, feeding the materials, and tightly covering the conversion box.
And step five, starting the equipment.
Step six, setting temperature and pressure data; the temperature was set to 400 ℃ and the pressure was set to 5 atmospheres in the computer software for the experiments.
Collecting a product; after 1 hour, the oil and air pumps were opened to collect the product.
Step eight, collecting data; the mass of oil in the product and the volume of gas in the product were measured and recorded.
Step nine, taking out a sample; and taking out the sample after cooling.
And finishing the experiment for measuring the conversion efficiency of the slime water under 5 atmospheric pressures.
And carrying out an experiment on the coal slime water conversion efficiency of the coal slime water gas-liquid fluidized mining of the old goaf under a plurality of groups of coal levels.
And (5) sorting the data and processing the data.
FIG. 2 shows the effect diagram of conversion rate of different kinds of coal, and it can be seen from the diagram that the gas-liquid fluidization mining of the coal slurry water in the old goaf has the best conversion efficiency between 10MPa and 12 MPa.
Claims (9)
1. The utility model provides a device of old goaf coal slime water gas-liquid fluidization exploitation which characterized in that: the system comprises a superheated steam device, a coal slime water liquefaction conversion device, a gas liquefaction product collection device and a control device, wherein the control device comprises a temperature control device, a pressure control device, a temperature and pressure coordination device and a computer;
the superheated steam device consists of a water tank, a water supply pipeline, a heater and a steam pipeline; a water inlet of the water tank is connected with a water supply device through a hot melting connection water supply pipeline, and a water outlet of the water tank is connected with a heater through a hot melting connection water supply pipeline; one end of the steam pipeline is connected with the heater, and the other end of the steam pipeline is connected with the coal slime water liquefaction and conversion device;
the coal slime water-gas liquefaction conversion device comprises a coal slime water-gas liquefaction conversion box, and the coal slime water-gas liquefaction conversion box consists of a box cover and a box body; the coal slime water liquefaction and conversion box is internally composed of a constant temperature layer, a temperature sensor, a pressure sensor, a reading display and a control switch; the coal slime water liquefaction conversion box provides a reaction site and collects temperature and pressure parameters, and the parameters are transmitted to a computer, analyzed and processed by the computer and then control a temperature and pressure controller, so that the required temperature and pressure conditions are achieved and maintained;
the gas-liquid product collecting device comprises an oil collecting device and a mixed gas collecting device, wherein the oil collecting device comprises an oil pump, an oil-water separator and an oil tank, and the mixed gas collecting device comprises an air pump, a dryer and an air tank; the coal slime water liquefaction conversion box is connected with an oil pump through an oil pumping pipeline, the oil pump is connected with an oil-water separator and an oil tank through an oil conveying pipeline, and the end part of the oil pumping pipeline is positioned at the bottom of the coal slime water liquefaction conversion box; the oil pump is an electric oil pump and pumps oil generated in the coal slime water liquefaction conversion tank to the oil-water separator; the oil-water separator can separate oil from water, one end of the oil-water separator is connected with the oil pump through an oil conveying pipeline, and the other end of the oil-water separator is connected to the oil tank through an oil conveying pipeline; the oil tank can collect oil; the inner surface of the oil pipeline is required to resist 40MPa and 1400 ℃, and the outer surface of the oil pipeline is not required;
the coal slime water liquefaction conversion box is connected with an air pump through an air exhaust pipeline, the air pump is connected with a dryer and an air tank through an air transmission pipeline, and the air exhaust pipeline is positioned above the liquid level of the coal slime water liquefaction conversion box; the air pump can pump out coal gas in the coal slime water liquefaction conversion tank; the dryer can absorb water in the coal gas, one end of the dryer is connected with the air pump through an air conveying pipeline, and the other end of the dryer is connected to the air tank through an air conveying pipeline; the inner surfaces of the air exhaust pipeline and the air transmission pipeline need to resist 40Mpa and 1400 ℃, and the outer surfaces do not need;
the temperature control device is positioned in the heater and consists of a temperature sensor and a temperature controller; the temperature sensor is arranged in the coal slime water liquefaction conversion box and has the function of measuring the average temperature of the coal slime water in the box; the temperature controller is used for controlling the temperature by controlling the heater to control the steam temperature and the steam flow; the temperature controller controls the temperature of steam generated by the heater, controls a valve in the heater and automatically controls an opener in the air pump;
the pressure control device is positioned in the coal slime water liquefaction conversion box and consists of a pressure sensor and a pressure controller; the pressure sensor is arranged in the conversion box and has the function of measuring the average pressure of the slime water; the pressure controller is used for controlling the pressure by controlling a control valve in the heater;
the temperature and pressure coordination device comprises an air pump; the air pump is internally provided with an automatic control opener; the temperature and pressure coordination device has the functions that when the temperature is lower than the set temperature, low-temperature gas in the conversion box is dynamically extracted, the amount of high-temperature gas introduced into the heater is controlled, the pressure of the device is kept constant, and the temperature is regulated; the internal pressure controller of the coal slime water liquefaction conversion box controls the automatic control opener in the air pump;
and the computer is connected with the coal slime water liquefaction conversion box and the heater, and comprehensively controls the temperature and the pressure of the controller through transmitting instructions.
2. The old goaf coal slime water gas-liquid fluidization exploitation device as claimed in claim 1, wherein: the 5-ton vertical flat-top stainless steel cylindrical water tank with the size of phi 1790mm 2350mm is provided with a water inlet positioned at the center of the top and a water outlet positioned 20 cm away from the bottom, wherein the nominal diameter of the water inlet is 4 cm, and the nominal diameter of the water outlet is 4 cm.
3. The old goaf coal slime water gas-liquid fluidization exploitation device as claimed in claim 1, wherein: the water supply pipeline is a PE pipe with the diameter of 4 cm, and the steam pipeline is a 304 stainless steel corrugated pipe.
4. The old goaf coal slime water gas-liquid fluidization exploitation device as claimed in claim 1, wherein: the heater heats water from the water tank into steam of 200-1200 ℃, and the steam is sent into the coal slime water liquefaction conversion tank through a steam pipeline; the heater can control the temperature of steam to be 200-1200 ℃, and can control the flow of the steam to be 0-200 mL/min.
5. The old goaf coal slime water gas-liquid fluidization exploitation device as claimed in claim 1, wherein: the box cover and the box body of the coal slime water liquefaction conversion box are made of stainless steel, the size of the box cover and the box body is 150mm 100mm, the box cover and the box body are tightly connected through four high-strength 8.8-grade galvanized outer hexagon bolts, and the box cover and the box body are high-temperature-resistant, high-pressure-resistant and heat-insulating and sealed.
6. The old goaf coal slime water gas-liquid fluidization exploitation device as claimed in claim 1, wherein: the air pump is an R400 laboratory air pump; the oil pump is an SB-1 type electric oil well pump.
7. The old goaf coal slime water gas-liquid fluidization exploitation device as claimed in claim 1, wherein: the joints of the coal slime water liquefaction conversion box, the steam pipeline, the oil pipeline and the gas pipeline are all provided with a 40 MPa-resistant 1400 ℃ combined gasket and a sealing adhesive tape, and the whole pipeline and each valve are provided with a wear-resistant pipeline and a 40 MPa-resistant 1400 ℃ sealing joint.
8. A method for old goaf coal slime water gas-liquid fluidization mining adopts the old goaf coal slime water gas-liquid fluidization mining device of any claim 1-7, and is characterized in that: the superheated steam is introduced into the conversion chamber to realize the conversion experiment of converting coal slurry into oil and mixed gas in the conversion chamber under the conditions of the temperature of 200-1200 ℃, the given pressure of 5-20 Mpa and the given coal grade of lignite, coking coal and anthracite.
9. The old goaf coal slime water gas-liquid fluidized mining method of claim 8, characterized in that: the experimental steps are as follows:
step one, determining an experimental scheme; the experimental material is from old goaf coal slime water with lignite as coal quality; controlling temperature and pressure by a computer to perform multiple groups of experiments;
step two, sample preparation; preparing coal slime water of 0.5 cubic meter for a sample;
step three, checking air tightness; connecting the experimental devices in sequence, generating a certain amount of steam through a heater, and judging the air tightness by observing the numerical value change of a pressure sensor on the coal slime water-gas liquefaction conversion box; if the pressure value is basically unchanged after 10 minutes, the air tightness is good;
step four, feeding materials; opening the conversion box, feeding materials, and tightly covering the conversion box; selecting whether to add a catalyst according to experimental requirements;
step five, starting equipment;
step six, setting temperature and pressure data; setting the pressure of 5 atmospheric pressures in the computer software and the temperature of 400 ℃ for carrying out experiments;
collecting a product; opening an oil pump and an air pump after 1 hour to collect a product;
step eight, collecting data; measuring and recording the mass of oil in the product and the volume of gas in the product;
step nine, taking out the sample after cooling;
and (5) sorting the data and processing the data.
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