CN111760217A - Power generation equipment for preventing and controlling spontaneous combustion of coal gangue dump and heat recovery and control method - Google Patents
Power generation equipment for preventing and controlling spontaneous combustion of coal gangue dump and heat recovery and control method Download PDFInfo
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- CN111760217A CN111760217A CN202010650586.1A CN202010650586A CN111760217A CN 111760217 A CN111760217 A CN 111760217A CN 202010650586 A CN202010650586 A CN 202010650586A CN 111760217 A CN111760217 A CN 111760217A
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Abstract
The invention discloses a power generation device and a control method for preventing spontaneous combustion of a coal gangue dump and heat recovery, wherein the power generation device comprises a circulating liquid heat transfer working medium supply system, a double-sleeve sealing pipe drilling and sealing heat exchange system, a temperature monitoring and intelligent control system and a heat recovery power generation system; the circulating liquid heat transfer working medium supply system comprises a storage pool, a liquid supply pipeline and a recovery pipeline; the storage pool is communicated with the double-sleeve sealing pipe; the storage pool is communicated with a heat recovery power generation system; the double-sleeve sealing pipe is communicated with the supply pipeline, and the outer side wall of the double-sleeve sealing pipe is communicated with the heat recovery power generation system through a high-temperature output pipeline. The application provides a coal gangue hill spontaneous combustion prevention and heat recovery power generation equipment that is simple to be under construction, safe and reliable, economic high efficiency and energy-concerving and environment-protective, has advantages such as effective, controllable cooling, low power supply energy cost, energy-concerving and environment-protective, circulated use, engineering volume is little, the maintenance cost is low, has very strong economic nature and practicality.
Description
Technical Field
The invention relates to the technical field of coal mine gangue dump spontaneous combustion fire prevention and extinguishing treatment, in particular to a generating device for preventing coal gangue dump spontaneous combustion and heat recovery and a control method.
Background
The coal gangue is a solid waste with low carbon content selected in the coal mining process, and the yield of the coal gangue accounts for about 10-20% of the total coal yield. Because the mining depth of coal is continuously increased and the discharge amount of coal gangue is increased year by year, more than 2600 coal gangue piles are formed in China at present, and a large amount of coal gangue is accumulated in the open air, SO that the coal gangue piles not only occupy the land, but also can generate spontaneous combustion under the long-term oxidation action of air, release a large amount of toxic and harmful gases including CO, H2S, SO2 and the like, and are harmful to the health of people and pollute the environment.
Once the coal gangue dump is contacted with oxygen for a long time to generate spontaneous combustion, the fire extinguishing treatment of the coal gangue dump is very difficult, and the heat released by the spontaneous combustion cannot be effectively and environmentally utilized. The traditional fire prevention and extinguishing method comprises a grouting fire extinguishing method, a covering and rolling method, an excavating fire extinguishing method, a coal and gangue separation method, a deep inert gas injection method, a pressure injection inhibition material method, a water sprinkling cooling method and other methods, but the traditional fire prevention and extinguishing method cannot be widely popularized and applied due to high cost, large engineering quantity or poor prevention and control effect and environmental pollution, and the problem of preventing and controlling spontaneous combustion of the coal gangue dump needs to be further effectively solved.
Relevant researches show that after the spontaneous combustion of the coal gangue dump, the surface temperature of the coal gangue can reach 40-50 ℃, the internal temperature of the gangue dump can reach 300-.
Disclosure of Invention
The invention aims to provide power generation equipment and a control mode for preventing spontaneous combustion of a gangue dump and heat recovery, which are used for solving the problems in the prior art, can realize effective controllable cooling and reduce the cost of power supply energy, and the whole system is energy-saving, environment-friendly and recyclable.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a power generation device for preventing spontaneous combustion of a coal gangue dump and recovering heat, which is characterized by comprising a circulating liquid heat transfer working medium supply system, a double-sleeve sealing pipe drill sealing heat exchange system and a heat recovery power generation system;
the circulating liquid heat transfer working medium supply system comprises a storage pool, a liquid supply pipeline and a recovery pipeline; the storage pool is communicated with the double-sleeve sealing pipe drilling and sealing heat exchange system through the supply pipeline; the storage pool is communicated with the heat recovery power generation system through the recovery pipeline;
the double-sleeve sealing pipe drilling and sealing heat exchange system comprises double sealing pipes and a high-temperature output pipeline; the double-sleeve sealing pipe is embedded into the gangue dump; the double-sleeve sealing pipe is provided with at least one, the top end of the double-sleeve sealing pipe is communicated with the supply pipeline, and the outer side wall of the double-sleeve sealing pipe is communicated with the heat recovery power generation system through the high-temperature output pipeline.
Preferably, a plurality of double-sleeve sealing pipe drilling and sealing heat exchange systems are arranged with measurement nodes of the coal gangue dump in a cross grid shape, a plurality of double-sleeve sealing pipes are arranged in each double-sleeve sealing pipe drilling and sealing heat exchange system, and each sealing pipe is communicated with the high-temperature output pipeline and the supply pipeline so as to achieve the purpose of transferring the liquid heat transfer working medium.
Preferably, the supply line and the recovery line are made of corrosion-resistant (or corrosion-resistant) high-temperature-resistant materials such as stainless steel.
The double-sleeve sealing pipe comprises an inner sleeve, an outer sleeve and a drill bit; the inner sleeve is arranged in the outer sleeve and is in sealed connection with the outer sleeve; the drill bit is fixedly arranged at the bottom of the outer casing; and the pipe orifice of the inner layer sleeve is communicated with the pipe wall of the supply pipeline.
Preferably, the outer casing pipe can be divided into a heat insulation section and a heat absorption section at the position in the gangue dump; the division needs to be according to the actual temperature in the gangue dump, and the heat absorption section is a high-temperature area of the gangue dump;
the heat insulation interlayer is arranged on the heat insulation section of the outer wall of the outer sleeve, and the heat insulation interlayer is arranged on the heat insulation section of the outer wall of the outer sleeve in order to prevent a large amount of heat loss during heat exchange because the high temperature in the gangue dump needs to be absorbed by the liquid heat transfer working medium and then output through the high-temperature output pipeline; and in the same way, the outer walls of the inner layer sleeve and the high-temperature output pipeline are all provided with heat insulation interlayers; the inner layer sleeve extends into the inner cavity of the outer layer sleeve; in order to prevent the low-temperature liquid heat transfer working medium which just enters from the storage pool from being directly heated in the inner sleeve, heat insulation interlayers are arranged on the outer wall of the inner sleeve and the heat insulation section of the outer sleeve;
the material of the heat insulation interlayer can be single or combination of various heat insulation materials such as an aluminum-plated film, an aluminum-plated polyester film, an aluminum-plated polyimide film and the like.
Preferably, the length of the inner casing is 0.618 times of that of the outer casing, and the length of the outer casing drilled into the coal gangue dump is 10-15 m.
Preferably, the spiral threads arranged on the outer wall of the outer-layer sleeve are used for enhancing the sealing effect of the double-sealing sleeve in the gangue dump.
The drill bit at the bottom of the coal gangue dump has the effects that the resistance of the double-sleeve sealing pipe is reduced when the double-sleeve sealing pipe is inserted into the coal gangue dump, and the drill hole of the drill bit needs to be sealed to prevent the drill bit from contacting with the outside air for a long time;
the heat recovery power generation system comprises a recovery pool, a thermoelectric generator, a cooling fin, a transformer and external power; the thermoelectric generator is arranged outside the recovery tank in a sealing manner; at least one cooling fin is arranged on the outer side of the thermoelectric generator; the thermoelectric generator is electrically connected with the transformer; the transformer is electrically connected with the external power utilization device; the recovery pipeline extends into the recovery tank.
Preferably, the construction material of the recovery tank is a good heat-conducting corrosion-resistant material; the thermoelectric generator can use power generation materials having high-efficiency thermoelectric conversion, including Pb-Te-based thermoelectric materials in the medium-temperature region or Pb-Te-based thermoelectric materials doped with thallium.
The storage pool, the outer casing and the recovery pool are all provided with liquid heat transfer working media; the liquid heat transfer working medium is surface water, underground water, tap water, reuse water after urban and industrial sewage treatment, seawater and other water sources meeting the industrial water standard or heat transfer working media with good heat transfer effect, such as liquid ammonia, liquid nitrogen, liquid pentane, heat transfer oil and the like.
A temperature monitoring and intelligent control system is also arranged; the temperature monitoring and intelligent control system comprises a computer temperature monitoring platform, a Programmable Logic Controller (PLC), a stirrer and a recovery pool temperature sensor which are arranged in a recovery pool, a recovery pipeline circulating pump and a recovery pipeline flow control valve which are arranged on a recovery pipeline, a supply pipeline circulating pump and a supply pipeline flow control valve which are arranged on a supply pipeline, a storage pool temperature sensor which is arranged in a storage pool, a double-sleeve sealing pipe temperature sensor which is arranged in an outer-layer sleeve and a coal gangue dump temperature sensor which is arranged in the coal gangue dump;
the computer temperature monitoring platform is electrically connected with the transformer; the computer temperature monitoring platform is electrically connected with the Programmable Logic Controller (PLC); the recovery tank temperature sensor, the storage tank temperature sensor, the double-sleeve sealing pipe temperature sensor and the coal gangue dump temperature sensor are all electrically connected with the computer temperature monitoring platform; the stirrer, the recycling pipeline circulating pump, the recycling pipeline flow control valve, the supply pipeline circulating pump and the supply pipeline flow control valve are electrically connected with the programmable logic controller PLC.
Preferably, the stirrer is arranged at the bottom of the recovery tank and is used for controlling the temperature in the recovery tank through the rotation of the stirrer, and the heat transfer working medium entering through the high-temperature output pipeline is high-temperature gas, so that electric energy is generated by the thermoelectric generator through the temperature difference in the thermoelectric generator.
Also provided with a spiral thread and a heat insulating layer; the outer pipe walls of the inner layer sleeve and the high-temperature output pipeline are covered with the heat insulation layers; the upper side of the outer pipe wall of the outer casing pipe is also covered with the heat insulation layer; and the outer side of the outer sleeve is provided with a spiral thread.
The external power utilization comprises a storage battery and a national power grid; the storage battery and the national power grid are respectively electrically connected with the transformer.
Preferably, when the heat of the coal gangue dump is generally utilized, the heat can only be generated in an instant mode, but the device can not only enter a national power grid for power utilization in an instant power generation mode, but also can be directly stored in storage batteries or electric vehicles and other power storage equipment.
The internal temperature of the gangue dump enters a heating temperature rise period at 90 ℃; the temperature is more than 300 ℃ which is the actual burning period; the temperature of each position of the system is accurately obtained through a temperature sensor arranged in each system and a temperature sensor arranged in the coal gangue dump, the flow speed of heat transfer working media in the whole circulating system is controlled through the stirrer, the recycling pipeline circulating pump, the recycling pipeline flow control valve, the supply pipeline circulating pump and the supply pipeline flow control valve, and the internal temperature of a high-temperature area of the coal gangue dump is controlled to be below 90 ℃ or lower; therefore, spontaneous combustion caused by overhigh temperature of the high-temperature area of the coal gangue dump can be prevented, the emission of toxic and harmful substances is reduced, and meanwhile, the heat generated by spontaneous combustion of the coal gangue is effectively recycled.
A control method for preventing spontaneous combustion of a coal gangue dump and heat recovery power generation is characterized by comprising the following specific steps:
the method comprises the steps that firstly, measuring nodes are arranged on the surface of the coal gangue dump, the measuring nodes are arranged in a cross grid mode, the surface temperature of the coal gangue dump is measured through an infrared thermometer, and an abnormal area is determined by comparing the surface temperature with the ambient temperature;
secondly, arranging drilling groups in the abnormal area, wherein the drilling groups are arranged in a grid shape, and double sealing pipes are inserted into the drilling groups through a drill bit at the bottom; adding liquid heat transfer working medium into the storage tank;
step three, the liquid heat transfer working medium in the storage pool enters the inner layer sleeve through the supply pipeline, heat exchange is carried out in the outer layer sleeve, the liquid heat transfer working medium is changed into high-temperature gas, and the high-temperature gas enters the recovery pool through a high-temperature output pipeline communicated with the top end of the side wall of the outer layer sleeve;
step four, the high-temperature gas and the liquid are cooled and then become low-temperature liquid heat transfer working medium, and the low-temperature liquid heat transfer working medium flows back to the storage pool through the recovery pipeline to complete circulation;
step five, when the recovery tank cools the high-temperature gas and liquid, the cooling temperature difference is utilized, the thermoelectric generator generates electricity, and the electricity is supplied to the computer temperature monitoring platform, the Programmable Logic Controller (PLC) and an external electric appliance after the electricity enters the transformer for transformation;
and step six, monitoring each position by the computer temperature monitoring platform, and feeding back to the Programmable Logic Controller (PLC) to control the flow rate of the liquid heat transfer working medium in circulating transportation.
Preferably, the suitable spacing of the measurement nodes in step one is 5-10 m.
Preferably, the distance between the drill holes in the second step is 1m, and the specific length is determined according to the surface temperature measurement condition.
The control method of the sixth step is specifically that when a computer temperature monitoring platform reads temperature data of a double-sleeve sealing pipe temperature sensor and a coal gangue dump temperature sensor, a Programmable Logic Controller (PLC) controls a supply pipeline flow control valve and a supply pipeline circulating pump to adjust the flow velocity of the liquid heat transfer working medium, and the heat exchange state of the heat absorption section of the outer sleeve is accelerated or slowed until the temperature of the surrounding coal gangue is reduced to below 90 ℃ or lower; the temperature data of the temperature sensor of the liquid heat transfer working medium recovery pool can be read through a computer temperature monitoring platform in the temperature monitoring and intelligent control system, the flow control valve of the recovery pipeline, the circulating pump of the recovery pipeline and the stirrer are controlled through a Programmable Logic Controller (PLC), and the temperature and the flow speed of the liquid heat transfer working medium are controlled to be sent back to the storage pool through the recovery pipeline; the running speed of the stirrer can be accelerated or slowed down according to the temperature data of the temperature sensor of the recovery tank, and the flow rate of the recovery circulation conveying is ensured.
The invention discloses the following technical effects: the device utilizes the advantages of good sealing effect, effective and controllable heat conduction performance of a drilling and sealing body of the double-sleeve sealing pipe drilling and sealing heat exchange system to continuously recycle heat generated by oxidation in the coal gangue dump to a power generation system; under the intensive arrangement of the double-sleeve sealing pipe heat exchange system, the temperature of a high-temperature abnormal area of the coal gangue dump can be continuously reduced, the occurrence of spontaneous combustion is prevented, the emission of toxic and harmful substances is reduced, and meanwhile, the heat generated by the spontaneous combustion of the coal gangue is effectively recycled; the application provides a construction is simple, safe and reliable, economic high efficiency and energy-concerving and environment-protective to spontaneous combustion prevention and heat recovery power generation facility of coal gangue mountain, has advantages such as effective, controllable cooling, low power supply energy cost, energy-concerving and environment-protective, circulated use, engineering volume is little, the maintenance cost is low, has very strong economic nature and practicality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of a coal gangue dump spontaneous combustion and heat recovery power generation plant.
FIG. 2 is a schematic diagram of a power generation plant for effectively controlling temperature to prevent spontaneous combustion of a coal gangue dump and recovering heat.
FIG. 3 is a schematic diagram of the distribution of the gangue dump in an area with abnormal temperature according to the present invention.
Fig. 4 is a schematic diagram of dense grid drilling and sealing construction layout according to the present invention.
FIG. 5 is a schematic view of a single double casing sealed tube drill seal heat exchange system of the present invention.
Wherein, 1-circulating liquid heat transfer working medium supply system, 11-storage pool, 12-supply pipeline, 13-recovery pipeline, 2-double-sleeve sealed pipe drilling heat exchange system, 21-inner layer sleeve, 22-outer layer sleeve, 23-high temperature output pipeline, 24-drill bit, 25-spiral thread, 26-heat insulation layer, 27-liquid heat transfer working medium, 3-temperature monitoring and intelligent control system, 31-computer temperature monitoring platform, 32-programmable controller PLC, 33-stirrer, 34-supply pipeline circulating pump, 35-supply pipeline flow control valve, 36-recovery pipeline circulating pump, 37-recovery pipeline flow control valve, 38-recovery pool temperature sensor, 39-storage pool temperature sensor, 310-double-sleeve sealed pipe temperature sensor, 311-gangue dump temperature sensor, 4-heat recovery power generation system, 41-recovery pool, 42-thermoelectric generator, 43-radiating fin, 44-transformer, 45-storage battery, 46-national grid, 5-gangue dump, 6-abnormal area and 7-drilling group.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a power generation device for preventing spontaneous combustion of a coal gangue dump and recovering heat, which is characterized by comprising a circulating liquid heat transfer working medium supply system 1, a double-sleeve sealing pipe drilling and sealing heat exchange system 2 and a heat recovery power generation system 4;
the circulating liquid heat transfer working medium supply system 1 comprises a storage pool 11, a liquid supply pipeline 12 and a recovery pipeline 13; the storage pool 11 is communicated with the double-sleeve sealing pipe drill sealing heat exchange system 2 through a supply pipeline 12; the storage pool 11 is communicated with the heat recovery power generation system 4 through a recovery pipeline 13;
the double-sleeve sealing pipe drilling and sealing heat exchange system 2 comprises double-sleeve sealing pipes and a high-temperature output pipeline 23; the double-sleeve sealing pipe is embedded in the gangue dump 5; the double-sleeve sealing pipe is provided with at least one, the top end of the double-sleeve sealing pipe is communicated with the supply pipeline 12, and the outer side wall of the double-sleeve sealing pipe is communicated with the heat recovery power generation system 4 through the high-temperature output pipeline 23.
The double-sleeve sealing pipe comprises an inner sleeve 21, an outer sleeve 22 and a drill bit 24; the inner layer sleeve 21 is arranged in the outer layer sleeve 22 and is connected with the outer layer sleeve 22 in a sealing way; the drill bit 24 is fixedly arranged at the bottom of the outer casing 22; the orifice of the inner casing 21 is in communication with the wall of the supply line 12.
The heat recovery power generation system 4 includes a recovery tank 41, a thermoelectric generator 42, a heat sink 43, a transformer 44, and external power; a thermoelectric generator 42 is arranged outside the recovery tank 41 in a sealing manner; at least one cooling fin 43 is arranged outside the thermoelectric generator 42; the thermoelectric generator 42 is electrically connected with the transformer 44; the transformer 44 is electrically connected with external electricity; the recovery pipe 13 extends into the recovery tank 41.
The storage tank 11, the outer casing 22 and the recovery tank 41 are all provided with liquid heat transfer working media 27; the liquid heat transfer working medium 27 is surface water, underground water, tap water, reuse water after urban and industrial sewage treatment, seawater and other water sources meeting the industrial water standard or heat transfer working media with good heat transfer effect, such as liquid ammonia, liquid nitrogen, liquid pentane, heat transfer oil and the like.
A temperature monitoring and intelligent control system 3 is also arranged; the temperature monitoring and intelligent control system 3 comprises a computer temperature monitoring platform 31, a programmable logic controller PLC32, a stirrer 33 and a recovery tank temperature sensor 38 which are arranged in a recovery tank 41, a recovery pipeline circulating pump 34 and a recovery pipeline flow control valve 35 which are arranged on a recovery pipeline 13, a supply pipeline circulating pump 36 and a supply pipeline flow control valve 37 which are arranged on a supply pipeline 12, a storage tank temperature sensor 39 which is arranged in a storage tank 11, a double-sleeve sealing pipe temperature sensor 310 which is arranged in an outer-layer sleeve 22 and a coal gangue dump temperature sensor 311 which is arranged in a coal gangue dump 5;
the computer temperature monitoring platform 31 is electrically connected with the transformer 44; the computer temperature monitoring platform 31 is electrically connected with the programmable controller PLC 32; the recovery tank temperature sensor 38, the storage tank temperature sensor 39, the double-sleeve sealing pipe temperature sensor 310 and the coal gangue dump temperature sensor 311 are electrically connected with the computer temperature monitoring platform 31; the agitator 33, the recovery line circulation pump 34, the recovery line flow rate control valve 35, the supply line circulation pump 36, and the supply line flow rate control valve 37 are electrically connected to a programmable logic controller PLC 32.
A spiral thread 25 and a heat insulating layer 26 are also arranged; the outer pipe walls of the inner casing 21 and the high-temperature output pipeline 23 are covered with heat insulation layers 26; the upper side of the outer pipe wall of the outer sleeve 22 is also covered with a heat insulation layer 26; the outer side of the outer sleeve 22 is provided with a helical thread 25.
The external power utilization comprises a storage battery 45 and a national power grid 46; the storage battery 45 and the national power grid 46 are respectively electrically connected with the transformer 44.
The method comprises the following specific steps:
firstly, arranging measurement nodes on the surface of a coal gangue dump 5, wherein the measurement nodes are arranged in a cross grid manner, measuring the surface temperature of the coal gangue dump 5 by using an infrared thermometer, and determining an abnormal area 6 by comparing the surface temperature with the environmental temperature;
secondly, arranging drilling groups 7 in the abnormal area 6, wherein the drilling groups 7 are arranged in a grid shape, and double sealing pipes are inserted into the drilling groups 7 through a drill bit 24 at the bottom; adding a liquid heat transfer working medium 27 into the storage tank 11;
step three, the liquid heat transfer working medium 27 in the storage pool 11 enters the inner-layer sleeve 21 through the supply pipeline 12, heat exchange is carried out in the outer-layer sleeve 22, and the liquid heat transfer working medium is changed into high-temperature gas and liquid, and enters the recovery pool 41 through a high-temperature output pipeline 23 communicated with the top end of the side wall of the outer-layer sleeve 22;
step four, the high-temperature gas and the liquid are cooled and then become low-temperature liquid heat transfer working medium 27, and the low-temperature liquid heat transfer working medium flows back to the storage pool 11 through the recovery pipeline 13 to complete circulation;
step five, when the recovery tank 41 cools the high-temperature gas and liquid, the cooling temperature difference is utilized, electricity is generated through the thermoelectric generator 42, and the electricity is supplied to the computer temperature monitoring platform 31, the programmable logic controller PLC32 and an external electrical appliance after the electricity is transformed in the transformer 44;
and step six, the computer temperature monitoring platform 31 monitors all the positions and feeds the positions back to the programmable logic controller PLC32 to control the flow rate of the liquid heat transfer working medium in circulating transportation.
The control method in the sixth step is specifically that when the computer temperature monitoring platform 31 reads the temperature data of the double-sealed-tank temperature sensor 310 and the coal gangue dump temperature sensor 311, the programmable controller PLC32 controls the supply pipeline flow control valve 35 and the supply pipeline circulating pump 34 to adjust the flow rate of the liquid heat transfer working medium 27, and the heat exchange state of the heat absorption section of the outer casing 22 is accelerated or slowed until the temperature of the surrounding coal gangue is reduced to below 90 ℃; the temperature data of the liquid heat transfer working medium recovery pool temperature sensor 38 can be read through the computer temperature monitoring platform 31 in the temperature monitoring and intelligent control system 3, the programmable controller PLC32 controls the recovery pipeline flow control valve 37, the recovery pipeline circulating pump 36 and the stirrer 33, and the temperature and the flow speed of the liquid heat transfer working medium 27 are controlled to be sent back to the storage pool 11 through the recovery pipeline; the running speed of the stirrer 33 can be accelerated or decelerated according to the temperature data of the recovery tank temperature sensor 38, so that the flow rate of the recovery circulation conveying is ensured.
In one embodiment of the invention, the suitable distance between the measurement nodes in the first step is 5 m; the length of the inner casing 21 is 0.618 times that of the outer casing 22, and the length of the outer casing drilled into the gangue dump is 15 m.
The invention discloses the following technical effects: the device utilizes the advantages of good sealing effect, effective and controllable heat conduction performance of a drilling and sealing body of the double-sleeve sealing pipe drilling and sealing heat exchange system to continuously recycle heat generated by oxidation in the coal gangue dump to a power generation system; under the intensive arrangement of the double-sleeve sealing pipe heat exchange system, the temperature of a high-temperature abnormal area of the coal gangue dump can be continuously reduced, the occurrence of spontaneous combustion is prevented, the emission of toxic and harmful substances is reduced, and meanwhile, the heat generated by the spontaneous combustion of the coal gangue is effectively recycled; the application provides a construction is simple, safe and reliable, economic high efficiency and energy-concerving and environment-protective to spontaneous combustion prevention and heat recovery power generation facility of coal gangue mountain, has advantages such as effective, controllable cooling, low power supply energy cost, energy-concerving and environment-protective, circulated use, engineering volume is little, the maintenance cost is low, has very strong economic nature and practicality.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. The power generation equipment for preventing and treating the spontaneous combustion of the coal gangue dump and recovering heat is characterized by comprising a circulating liquid heat transfer working medium supply system (1), a double-sleeve sealing pipe drilling and sealing heat exchange system (2) and a heat recovery power generation system (4);
the circulating liquid heat transfer working medium supply system (1) comprises a storage pool (11), a liquid supply pipeline (12) and a recovery pipeline (13); the storage pool (11) is communicated with the double-sleeve sealed pipe drilling and sealing heat exchange system (2) through the supply pipeline (12); the storage pool (11) is communicated with the heat recovery power generation system (4) through the recovery pipeline (13);
the double-sleeve sealing pipe drilling and sealing heat exchange system (2) comprises double-sleeve sealing pipes and a high-temperature output pipeline (23); the double-sleeve sealing pipe is embedded into the coal gangue dump (5); the double-sleeve sealing pipe is provided with at least one sealing pipe, the top end of the double-sleeve sealing pipe is communicated with the supply pipeline (12), and the outer side wall of the double-sleeve sealing pipe is communicated with the heat recovery power generation system (4) through the high-temperature output pipeline (23).
2. The power generation equipment for preventing spontaneous combustion of gangue dump and recovering heat according to claim 1, which is characterized in that: the double-sleeve sealing pipe comprises an inner sleeve (21), an outer sleeve (22) and a drill bit (24); the inner-layer sleeve (21) is arranged in the outer-layer sleeve (22) and is connected with the outer-layer sleeve (22) in a sealing way; the drill bit (24) is fixedly arranged at the bottom of the outer casing (22); the pipe orifice of the inner layer sleeve (21) is communicated with the pipe wall of the supply pipeline (12); the top end of the outer side wall of the outer casing (22) is communicated with the high-temperature output pipeline (23).
3. The power generation equipment for preventing spontaneous combustion of gangue dump and recovering heat according to claim 1, which is characterized in that: the heat recovery power generation system (4) comprises a recovery pool (41), a thermoelectric generator (42), a cooling fin (43), a transformer (44) and external power; the thermoelectric generator (42) is arranged outside the recovery tank (41) in a sealing manner; at least one cooling fin (43) is arranged outside the thermoelectric generator (42); the thermoelectric generator (42) is electrically connected with the transformer (44); the transformer (44) is electrically connected with the external power; the recovery pipeline (13) extends into the recovery tank (41).
4. The power generation equipment for preventing spontaneous combustion of gangue dump and recovering heat as claimed in claims 1-3, wherein: a temperature monitoring and intelligent control system (3) is also arranged; the temperature monitoring and intelligent control system (3) comprises a computer temperature monitoring platform (31), a Programmable Logic Controller (PLC) (32), a stirrer (33) and a recovery tank temperature sensor (38) which are arranged in a recovery tank (41), a recovery pipeline circulating pump (34) and a recovery pipeline flow control valve (35) which are arranged on a recovery pipeline (13), a supply pipeline circulating pump (36) and a supply pipeline flow control valve (37) which are arranged on a supply pipeline (12), a storage tank temperature sensor (39) which is arranged in a storage tank (11), a double-sleeve sealing pipe temperature sensor (310) which is arranged in an outer sleeve (22) and a coal gangue dump temperature sensor (311) which is arranged in a coal gangue dump (5);
the computer temperature monitoring platform (31) is electrically connected with the transformer (44); the computer temperature monitoring platform (31) is electrically connected with the Programmable Logic Controller (PLC) (32); the recovery tank temperature sensor (38), the storage tank temperature sensor (39), the double-sleeve sealing pipe temperature sensor (310) and the coal gangue dump temperature sensor (311) are electrically connected with the computer temperature monitoring platform (31); the stirrer (33), the recovery pipeline circulating pump (34), the recovery pipeline flow control valve (35), the supply pipeline circulating pump (36) and the supply pipeline flow control valve (37) are electrically connected with the Programmable Logic Controller (PLC) (32).
5. The power generation equipment for preventing spontaneous combustion of gangue dump and recovering heat as claimed in claim 4, wherein: the storage tank (11), the outer casing (22) and the recovery tank (41) are all provided with liquid heat transfer working media (27); the liquid heat transfer working medium (27) is surface water, underground water, tap water, reuse water after urban and industrial sewage treatment, seawater and other water sources meeting the industrial water standard or heat transfer working media with good heat transfer effect such as liquid ammonia, liquid nitrogen, liquid pentane and heat transfer oil.
6. The power generation equipment for preventing spontaneous combustion of gangue dump and recovering heat according to claim 2, which is characterized in that: a spiral thread (25) and a heat insulating layer (26) are also arranged; the outer pipe walls of the inner layer sleeve (21) and the high-temperature output pipeline (23) are covered with the heat insulation layer (26); the upper side of the outer pipe wall of the outer layer sleeve (22) is also covered with the heat insulation layer (26); the outer side of the outer layer sleeve (22) is provided with a spiral thread (25).
7. The power generation equipment for preventing spontaneous combustion of gangue dump and recovering heat according to claim 3, which is characterized in that: the external power utilization comprises a storage battery (45) and a national power grid (46); the storage battery (45) and the national power grid (46) are respectively electrically connected with the transformer (44).
8. The control method for preventing spontaneous combustion of the gangue dump and heat recovery power generation based on any one of claims 1 to 7 is characterized by comprising the following specific steps of:
step one, arranging measurement nodes on the surface of the coal gangue dump (5), wherein the measurement nodes are arranged in a cross grid mode, measuring the surface temperature of the coal gangue dump (5) by using an infrared thermometer, and determining an abnormal area (6) by comparing the environmental temperature;
secondly, arranging drilling groups (7) in the abnormal area (6), wherein the drilling groups (7) are arranged in a grid shape, and double sealing pipes are inserted into the drilling groups (7) through a drill bit (24) at the bottom; adding a liquid heat transfer medium (27) into the storage tank (11);
step three, the liquid heat transfer working medium (27) in the storage pool (11) enters the inner-layer sleeve (21) through the supply pipeline (12), heat exchange is carried out in the outer-layer sleeve (22) to become high-temperature gas and liquid, and the high-temperature gas and the liquid enter the recovery pool (41) through a high-temperature output pipeline (23) communicated with the top end of the side wall of the outer-layer sleeve (22);
step four, the high-temperature gas and the liquid are cooled and then become low-temperature liquid heat transfer working medium (27) to flow back to the storage pool (11) through the recovery pipeline (13) to complete circulation;
step five, when the recovery pool (41) cools the high-temperature gas and liquid, the cooling temperature difference is utilized, electricity is generated through a temperature difference generator (42), and the high-temperature gas and liquid enters a transformer (44) for transformation, and then power is supplied to a computer temperature monitoring platform (31), a Programmable Logic Controller (PLC) (32) and an external electrical appliance;
and step six, monitoring each position by the computer temperature monitoring platform (31), and feeding back to the Programmable Logic Controller (PLC) (32) to control the flow rate of the liquid heat transfer working medium circulating transportation.
9. The control method for preventing spontaneous combustion of the gangue dump and heat recovery power generation as claimed in claim 8, wherein the control method comprises the following steps: in the first step, the proper distance between the measuring nodes is 5-10 m.
10. The control method for preventing spontaneous combustion of the gangue dump and heat recovery power generation as claimed in claim 8, wherein the control method comprises the following steps: the control method of the sixth step is specifically that when a computer temperature monitoring platform (31) reads temperature data of a double-sleeve sealing pipe temperature sensor (310) and a coal gangue dump temperature sensor (311), a Programmable Logic Controller (PLC) (32) controls a supply pipeline flow control valve (35) and a supply pipeline circulating pump (34), the flow rate of the liquid heat transfer working medium (27) is adjusted, and the heat exchange state of a heat absorption section of an outer sleeve (22) is accelerated or slowed until the temperature of the surrounding coal gangue is reduced to below 90 ℃; temperature data of a liquid heat transfer working medium recovery pool temperature sensor (38) can be read through a computer temperature monitoring platform (31) in the temperature monitoring and intelligent control system (3), a Programmable Logic Controller (PLC) (32) is used for controlling a recovery pipeline flow control valve (37), a recovery pipeline circulating pump (36) and a stirrer (33), and the temperature and the flow speed of the liquid heat transfer working medium (27) are controlled to be sent back to the storage pool (11) through a recovery pipeline; the running speed of the stirrer (33) can be accelerated or decelerated according to the temperature data of the recovery tank temperature sensor (38), and the flow rate of the recovery circulation conveying is ensured.
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| CN202010650586.1A CN111760217A (en) | 2020-07-08 | 2020-07-08 | Power generation equipment for preventing and controlling spontaneous combustion of coal gangue dump and heat recovery and control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112897809A (en) * | 2021-01-21 | 2021-06-04 | 吉林建筑大学 | Ecological agriculture water resource automatic cycle moisturizing device |
| CN113144464A (en) * | 2021-04-07 | 2021-07-23 | 太原理工大学 | Method for inhibiting spontaneous combustion of coal gangue pile and extracting heat of coal gangue pile for application |
| CN114439536A (en) * | 2022-02-10 | 2022-05-06 | 陇东学院 | Device for preventing spontaneous combustion of coal in coal bed |
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2020
- 2020-07-08 CN CN202010650586.1A patent/CN111760217A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112897809A (en) * | 2021-01-21 | 2021-06-04 | 吉林建筑大学 | Ecological agriculture water resource automatic cycle moisturizing device |
| CN113144464A (en) * | 2021-04-07 | 2021-07-23 | 太原理工大学 | Method for inhibiting spontaneous combustion of coal gangue pile and extracting heat of coal gangue pile for application |
| CN114439536A (en) * | 2022-02-10 | 2022-05-06 | 陇东学院 | Device for preventing spontaneous combustion of coal in coal bed |
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