CN110787389A - Rapid heat transfer grouting system - Google Patents
Rapid heat transfer grouting system Download PDFInfo
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- CN110787389A CN110787389A CN201910916815.7A CN201910916815A CN110787389A CN 110787389 A CN110787389 A CN 110787389A CN 201910916815 A CN201910916815 A CN 201910916815A CN 110787389 A CN110787389 A CN 110787389A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/04—Fire prevention, containment or extinguishing specially adapted for particular objects or places for dust or loosely-baled or loosely-piled materials, e.g. in silos, in chimneys
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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Abstract
The invention discloses a rapid heat transfer grouting system, which is used for the spontaneous combustion of the periphery of the bottom layer of a common coal gangue pile, the junction of the coal gangue pile, the windward side and other parts when being used for a coal pile; firstly, a temperature monitoring system is started, a temperature measuring device is used for detecting the highest temperature point, an evaporation section is buried at the highest temperature point in a coal pile, and a condensation section is located in an external heat environment; the working medium liquid is vaporized by receiving the heat of the evaporation section, is transmitted to the condensation section through the heat insulation section, transmits the heat of the coal pile emitted by the condensation section to the outside air, condenses and liquefies the heat dissipated by the working medium liquid in the heat pipe, and returns to the evaporation section along the pipe wall under the action of gravity, so that an independent working medium circulating system is formed to reduce the temperature of the coal pile; when the temperature monitoring device monitors the occurrence of a fire disaster, the specific position of the fire disaster and the change of the fire disaster can be accurately detected through the temperature monitoring system, the heat transfer grouting device is moved to a fire area, and the grouting system is started while the heat transfer cooling is carried out, so that the fire is quickly, accurately and efficiently extinguished.
Description
Technical Field
The invention relates to the technical field of heat transfer of heat pipes, in particular to a rapid heat transfer grouting system.
Background
In the coal mining and transporting process, the problem of coal pile storage is involved, and spontaneous combustion of the coal pile is always a big problem in coal storage and transportation; the spontaneous combustion coal gangue dump is a special combustion system, and has the characteristics of easy spontaneous combustion, easy reburning, large heat storage and the like; the conventional treatment means is from the perspective of oxygen isolation, but one of the conditions of spontaneous combustion of coal has a good heat storage environment, loose coal bodies exist in a broken state, the conventional excavation extinguishing method has relatively large engineering quantity, large-area stripping fire extinguishing cannot be carried out, and a surface layer is wrapped by a surface covering method, so that fracture air leakage is easy to occur to cause re-combustion; the fire extinguishing method of dry ice or fire retardant is expensive, but the traditional methods such as watering, embedding bamboos and compacting holes are heated, vaporized and absorbed heat by moisture in coal, and heat is dissipated by virtue of the chimney effect of holes to achieve the effect of cooling; but influenced by moisture content in the coal, on the one hand moisture leaves the coal pile in the form of vapor and takes away latent heat of vaporization, on the other hand, moisture escapes very much and will increase the contact area of coal and air thereby oxidation is accelerated, so the effect is not obvious, each aspect has received certain limitation again, just hardly plays the effect of cooling after the cooling goes on to certain degree.
In addition, the temperature reduction may not reach the ideal condition, and the spontaneous combustion phenomenon is still caused; the existing grouting fire extinguishing device does not have the function of heat transfer, can not accurately position the ignition position, can not quickly reduce the temperature and remove heat, has no purpose in the process of extinguishing the fire, and can not accurately judge whether the fire is extinguished or not; resulting in unnecessary waste or incomplete extinguishing of the fire during the fire extinguishing process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a rapid heat transfer grouting system, aiming at solving the problems that the traditional method for cooling a coal pile at the present stage has poor cooling effect, the oxidation of coal can be accelerated after cooling, and the coal spontaneous combustion is caused by poor cooling effect, and providing a fire-extinguishing device which is brand new, has simple structure, simple manufacture and convenient use, has the function of a thermal diode, has good heat transfer performance and is quicker; in places with temperature difference, the natural phenomenon that heat is transferred from high to low inevitably exists, and in three ways of heat transfer, namely heat transfer, heat radiation and heat convection, the heat transfer speed is the fastest; the heat pipe is a heat exchange element with extremely high heat transfer efficiency, realizes high-efficiency heat transfer by means of intersection of internal working media and continuous working medium convection, heat exchange and circulation, and is a device with highest heat transfer efficiency in a passive cooling system; the gravity heat pipe has very reliable working performance and great use and practical value; when the cooling time is long enough, the absorption amount of the heat source of the evaporation section is equal to the heat dissipated to the air or other media of the condensation section (under an ideal state), and the heat source belongs to an independent working medium circulating system; in addition, the highest point of temperature can be found by monitoring the temperature in the drill hole, so that the heat transfer efficiency is improved; if spontaneous combustion occurs, the position of the fire can be determined, the movement direction of the fire can be known, and accurate fire extinguishment and fire extinguishment can be finally achieved.
The idea of the invention for solving the problems is as follows: the invention starts from destroying the heat storage environment, and determines the size, the embedding radius, the liquid filling rate and the embedding depth of the heat pipe according to the stacking form, the stacking size, the stacking time and the external environment of the coal pile; the method comprises the following steps of (1) inserting a heat-transfer fire extinguishing device into a coal pile, arranging a temperature-sensitive detector on the outer wall of a pipeline, connecting the temperature-sensitive detector with a temperature acquisition card through a transmission line, and then connecting the temperature-sensitive detector with a temperature monitoring device; when the coal pile has coal bed heat accumulation caused by oxidation, the temperature-sensing detector detects the highest temperature point, and the evaporation section is arranged at the highest temperature point; then a high heat source in the coal pile can be used as a starting heat source of the evaporation section of the heat pipe, working medium in the heat pipe absorbs heat, the heat is heated and vaporized to be steam, the heat in the coal bed is transferred to the condensation section, and the condensation section carries out heat convection with air to transfer the heat in the coal pile to outside air; thereby damaging the heat storage environment inside the coal seam, reducing the temperature of the oxidation zone and reducing the temperature of the coal pile; when the heat transfer is insufficient and spontaneous combustion occurs, the grouting device is started outside by monitoring the change of the temperature, and grouting fire extinguishing is started.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rapid heat transfer grouting system comprises a grouting device, a temperature monitoring device, a temperature acquisition card, a working medium pipe, a sensing circuit, a temperature-sensitive detector and a grouting pipeline; the grouting device is arranged on one side of the temperature monitoring device, the working medium pipe is arranged at least one, the cross section of the working medium pipe is of a cylinder structure with an annular arrangement, the working medium pipe is arranged on the other side of the temperature monitoring system, the grouting device, the temperature monitoring device and the working medium pipe are sequentially arranged from left to right, one side of the grouting device is connected with the temperature monitoring system through a first lead, one side of the temperature monitoring system is connected with the working medium pipe through a temperature acquisition card, the temperature monitoring system is connected with the temperature acquisition card through a second lead, one side of the outer wall of the working medium pipe is provided with at least one temperature detector, and the temperature acquisition card is connected with the temperature detector through a sensing line; the working medium pipe is of a cylindrical structure with a circular cross section, the grouting pipeline is of a cylindrical structure with a circular cross section, the working medium pipe is coated on the outer surface of the grouting pipe, the axis of the grouting pipeline and the axis of the working medium pipe are coaxially distributed, the working medium pipe and the grouting pipe are arranged in a hollow structure, and the working medium pipe and the grouting pipe are sequentially provided with an evaporation section, an insulation section and a condensation section from bottom to top; according to the principles of compatibility, working temperature, heat conductivity, economy and environmental protection, the working medium pipe and the grouting pipeline are made of carbon steel pipes, a first plug is arranged at the upper end of the working medium pipe and comprises a first transverse plate and a first fixed block, the first fixed block is arranged on the lower surface of the first transverse plate, the diameter of the first fixed block is consistent with the inner diameter of the grouting pipeline, the diameter of the first transverse plate is consistent with the outer diameter of the working medium pipe, working medium liquid is arranged at the bottom of the inner surface of the evaporation section, the bottom of the grouting pipeline exceeds the working medium pipe by at least 10-80mm, the grouting device is communicated with the grouting pipe through a guide pipe, the grouting device is inserted into the grouting pipe by at least 5-18mm through the guide pipe and the first plug arranged above the grouting pipe, and a sealing ring is arranged between the bottom of the grouting pipeline and the bottom of the working medium pipe, the sealing ring axis and the grouting pipeline axis are coaxially distributed, a second plug is arranged at the lower end of the grouting pipeline, the diameter of the second plug is consistent with the inner diameter of the grouting pipeline, a plurality of holes are uniformly distributed on two sides of the outer surface of the grouting pipeline and the bottom of the second plug, the diameter of each hole is 0.3-68mm, the end part of each temperature sensing detector is inserted into each hole, and the temperature sensing detectors sense the temperature inside the holes; the collected temperature is transmitted to a temperature collecting card through a sensing circuit, and then is transmitted to a temperature monitoring device through the temperature collecting card, and the change in the coal pile is known through monitoring the temperature, so that the internal temperature can be well monitored, and the heat transfer can be obviously displayed; when the coal pile has coal bed heat accumulation caused by oxidation, the temperature-sensing detector detects the highest temperature point, and the evaporation section is arranged at the highest temperature point; then a high heat source in the coal pile can be used as a starting heat source of the evaporation section of the heat pipe, working medium in the heat pipe absorbs heat, the heat is heated and vaporized to be steam, the heat in the coal bed is transferred to the condensation section, and the condensation section carries out heat convection with air to transfer the heat in the coal pile to outside air; thereby damaging the heat storage environment inside the coal seam, reducing the temperature of the oxidation zone and reducing the temperature of the coal pile; when the heat transfer is insufficient and spontaneous combustion occurs, the grouting device is started outside by monitoring the change of the temperature, and grouting fire extinguishing is started.
Furthermore, the length of the working medium pipe is 1-80m, and the diameter of the working medium pipe is 0.2-10 m.
Furthermore, the length of the evaporation section is 2/5-1/3 of the length of the working medium pipe, the diameter of the evaporation section is consistent with that of the working medium pipe, the length of the insulation section is 1/4-1/3 of the length of the working medium pipe, the diameter of the insulation section is consistent with that of the working medium pipe, the length of the condensation section is 2/5-1/3 of the length of the working medium pipe, and the diameter of the condensation section is consistent with that of the working medium pipe.
Furthermore, the length of the working medium pipe is 1/6-9/10 of the length of a grouting pipeline, and the diameter of the grouting pipeline is 1/4-2/3 of the diameter of the working medium pipe.
Furthermore, the working temperature of the working medium pipe is 0-300 ℃, the working temperature of the methanol is 10-130 ℃, the working temperature of the water is 50-250 ℃, and the working medium liquid is a mixed liquid of the methanol and the water because the methanol is easily dissolved in the water, the boiling point is low, the heat conductivity is high, and the working temperature is close to the working temperature of the water.
Further, the ratio of methanol to water of the working medium liquid in the working medium pipe is as follows: (0.3-0.8): (0.7-0.2).
Furthermore, when the filling rate of the working medium liquid is 20-60%, the heat transfer capacity is good.
Furthermore, when the liquid filling rate of the working medium liquid is 40%, the heat transfer capacity is the best, so that the liquid filling rate is 40%.
By adopting the technical scheme, the invention has the beneficial effects that:
the invention starts from destroying the heat storage environment, and determines the size, the embedding radius, the liquid filling rate and the embedding depth of the heat pipe according to the stacking form, the stacking size, the stacking time and the external environment of the coal pile; the method comprises the following steps of (1) inserting a heat-transfer fire extinguishing device into a coal pile, arranging a temperature-sensitive detector on the outer wall of a pipeline, connecting the temperature-sensitive detector with a temperature acquisition card through a transmission line, and then connecting the temperature-sensitive detector with a temperature monitoring device; when the coal pile has coal bed heat accumulation caused by oxidation, the temperature-sensing detector detects the highest temperature point, and the evaporation section is arranged at the highest temperature point; then a high heat source in the coal pile can be used as a starting heat source of the evaporation section of the heat pipe, working medium in the heat pipe absorbs heat, the heat is heated and vaporized to be steam, the heat in the coal bed is transferred to the condensation section, and the condensation section carries out heat convection with air to transfer the heat in the coal pile to outside air; thereby damaging the heat storage environment inside the coal seam, reducing the temperature of the oxidation zone and reducing the temperature of the coal pile; when the heat transfer is insufficient and spontaneous combustion occurs, the grouting device is started outside by monitoring the change of the temperature, and grouting fire extinguishing is started.
Drawings
Fig. 1 is a schematic structural diagram of a rapid heat removal grouting system according to the invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained by combining the specific embodiments as follows:
therefore, the following detailed description of the embodiments of the present invention, provided in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention, and all other embodiments, which can be obtained by those skilled in the art based on the embodiments of the present invention without inventive faculty, are within the scope of the invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements can be directly connected or indirectly connected through an intermediate medium, and the two elements can be communicated with each other, so that the specific meaning of the terms in the invention can be understood by those skilled in the art.
In conjunction with FIG. 1: a rapid heat transfer grouting system comprises a grouting device 1, a temperature monitoring device 2, a temperature acquisition card 3, a working medium pipe 4, a sensing line 5, a temperature-sensitive detector 6 and a grouting pipeline 7; the grouting device comprises at least one grouting device 1, the grouting device 1 is arranged on one side of a temperature monitoring device 2, at least one working medium pipe 4 is arranged, the cross section of the working medium pipe 4 is of a cylindrical structure with an annular arrangement, the working medium pipe 4 is arranged on the other side of the temperature monitoring system 2, the grouting device 1, the temperature monitoring device 2 and the working medium pipe 4 are sequentially arranged from left to right, one side of the grouting device 1 is connected with the temperature monitoring system 2 through a first lead 11, one side of the temperature monitoring system 2 is connected with the working medium pipe 4 through a temperature acquisition card 3, the temperature monitoring system 2 is connected with a temperature acquisition card 3 through a second lead 12, one side of the outer wall of the working medium pipe 4 is provided with at least one temperature sensing detector 6, and the temperature acquisition card 3 is connected with the temperature sensing detector 6 through a sensing line 5; the working medium pipe 4 is of a cylindrical structure with a circular cross section, the grouting pipeline 7 is of a cylindrical structure with a circular cross section, the working medium pipe 4 is coated on the outer surface of the grouting pipe 7, the axis of the grouting pipeline 7 and the axis of the working medium pipe 4 are coaxially distributed, the working medium pipe 4 and the grouting pipe 7 are arranged in a hollow structure, and an evaporation section 21, an insulation section 22 and a condensation section 23 are sequentially arranged between the working medium pipe 4 and the grouting pipe 7 from bottom to top; according to the principles of compatibility, working temperature, heat conductivity, economy and environmental protection, the working medium pipe 4 and the grouting pipe 7 are made of carbon steel pipes, the upper end of the working medium pipe 4 is provided with a first plug 30, the first plug 30 comprises a first transverse plate 31 and a first fixed block 32, the first fixed block 32 is arranged on the lower surface of the first transverse plate 31, the diameter of the first fixed block 32 is consistent with the inner diameter of the grouting pipe 7, the diameter of the first transverse plate 31 is consistent with the outer diameter of the working medium pipe 4, working medium liquid 40 is arranged at the bottom of the inner surface of the evaporation section 21, the bottom of the grouting pipe 7 exceeds the working medium pipe 4 by at least 10-80mm, the grouting device 1 is communicated with the grouting pipe 7 through a guide pipe 50, the grouting device 1 penetrates through the first plug 30 arranged above the grouting pipe 7 through the guide pipe 50 and is inserted into the grouting pipe 7 by at least 5-18mm, a sealing ring 60 is arranged between the bottom of the grouting pipeline 7 and the bottom of the working medium pipe 4, the axis of the sealing ring 60 and the axis of the grouting pipeline 7 are coaxially distributed, a second plug 70 is arranged at the lower end of the grouting pipeline 7, the diameter of the second plug 70 is consistent with the inner diameter of the grouting pipeline 7, a plurality of holes 80 are uniformly distributed on two sides of the outer surface of the grouting pipeline 7 and at the bottom of the second plug 70, the diameter of each hole 80 is 0.3-68mm, the end part of the temperature-sensitive detector 6 is inserted into each hole 80, and the temperature-sensitive detector 6 senses the temperature inside each hole 80; the collected temperature is transmitted to a temperature collecting card 3 through a sensing line 5, and then is transmitted to a temperature monitoring device 2 through the temperature collecting card 3, and the change of the inside of the coal pile can be known through monitoring the temperature, so that the inside temperature can be well monitored, and the heat transfer can be obviously displayed; when the coal pile has coal bed heat accumulation caused by oxidation, the temperature-sensing detector detects the highest temperature point, and the evaporation section is arranged at the highest temperature point; then a high heat source in the coal pile can be used as a starting heat source of the evaporation section of the heat pipe, working medium in the heat pipe absorbs heat, the heat is heated and vaporized to be steam, the heat in the coal bed is transferred to the condensation section, and the condensation section carries out heat convection with air to transfer the heat in the coal pile to outside air; thereby damaging the heat storage environment inside the coal seam, reducing the temperature of the oxidation zone and reducing the temperature of the coal pile; when the heat transfer is insufficient and spontaneous combustion occurs, the grouting device is started outside by monitoring the change of the temperature, and grouting fire extinguishing is started.
In the embodiment, the length of the working medium pipe 4 is 1-80m, and the diameter is 0.2-10 m.
In this embodiment, the length of the evaporation section 21 is 2/5-1/3 of the length of the working medium pipe 4, the diameter of the evaporation section 21 is consistent with that of the working medium pipe 4, the length of the insulation section 22 is 1/4-1/3 of the length of the working medium pipe 4, the diameter of the insulation section 22 is consistent with that of the working medium pipe 4, the length of the condensation section 23 is 2/5-1/3 of the length of the working medium pipe 4, and the diameter of the condensation section 23 is consistent with that of the working medium pipe 4.
In the embodiment, the length of the working medium pipe 4 is 1/6-9/10 of the length of a grouting pipeline 7, and the diameter of the grouting pipeline 7 is 1/4-2/3 of the diameter of the working medium pipe 4.
In this embodiment, the working temperature of the working medium pipe 4 is 0-300 ℃, the working temperature of methanol is 10-130 ℃, the working temperature of water is 50-250 ℃, and the working medium liquid 40 is a mixed liquid of methanol and water because methanol is easily soluble in water, has a low boiling point and a high thermal conductivity and is close to the working temperature of water.
In this embodiment, the ratio of methanol to water of the working medium liquid 40 in the working medium pipe 4 is: (0.3-0.8): (0.7-0.2).
In the embodiment, when the filling rate of the working medium liquid 40 is 20-60%, the heat transfer capacity is good.
In this embodiment, when the liquid filling rate of the working medium liquid 40 is 40%, the heat transfer capacity is the best, so the liquid filling rate is 40%.
As most domestic coal mines generally adopt an inverted slope type turning waste rock discharge method, waste rock land is directly dumped from the top of a slope, due to segregation phenomenon, the waste rock naturally falls to form different particle sizes for layering and stacking, the slope bottom is mainly large waste rock, the slope waist is smaller in particle size, and the slope top is small-particle-size waste rock; thus, the chimney effect is intensified, and the spontaneous combustion of coal is promoted; these coal piles have regions of easy naturalness, such as: the periphery of the bottom layer of the gangue pile, the junction of the gangue pile, the wind-facing surface and the like, so that a heat transfer grouting system is used in the natural areas, and the effects of cooling, preventing spontaneous combustion and extinguishing fire are better; the following describes a fast heat removal grouting system according to an embodiment of the present invention with reference to the accompanying drawings: when the temperature-sensing grouting device is used, firstly, a series of drill holes are drilled at certain intervals, the temperature monitoring system is started, the temperature-sensing grouting device is placed in the temperature-sensing grouting device, the temperature detected by the temperature-sensing detector is transmitted to the temperature acquisition card through the sensing line, and finally, the temperature is transmitted to the temperature monitoring device, and the highest temperature point is determined; then, the evaporation section is arranged at the highest temperature point, the heat absorbed by the evaporation section is transferred to the working medium pipe, then the working medium liquid in the working medium pipe absorbs the heat to be vaporized, the heat is transferred to the condensation section through the heat insulation section, and then the heat is exchanged by convection between the condensation section and the outside air, so that the heat is radiated; the working medium liquid is cooled and condensed, and returns to the evaporation section again under the action of gravity; when a fire disaster is detected, the temperature monitoring device monitors a fire disaster area, at the moment, the heat transfer grouting system is moved to the fire disaster area, and the grouting device is started while heat is transferred; in the process of fire extinguishing, the temperature monitoring device works all the time until the temperature of a fire area is reduced to a normal state, the grouting device is closed, and then heat removal work can be carried out all the time; the heat transfer and fire extinguishing integrated system greatly increases the heat transfer fire extinguishing efficiency, and can accurately position the highest temperature point, thereby quickly and effectively transferring heat to extinguish fire.
The invention starts from destroying the heat storage environment, and determines the size, the embedding radius, the liquid filling rate and the embedding depth of the heat pipe according to the stacking form, the stacking size, the stacking time and the external environment of the coal pile; the method comprises the following steps of (1) inserting a heat-transfer fire extinguishing device into a coal pile, arranging a temperature-sensitive detector on the outer wall of a pipeline, connecting the temperature-sensitive detector with a temperature acquisition card through a transmission line, and then connecting the temperature-sensitive detector with a temperature monitoring device; when the coal pile has coal bed heat accumulation caused by oxidation, the temperature-sensing detector detects the highest temperature point, and the evaporation section is arranged at the highest temperature point; then a high heat source in the coal pile can be used as a starting heat source of the evaporation section of the heat pipe, working medium in the heat pipe absorbs heat, the heat is heated and vaporized to be steam, the heat in the coal bed is transferred to the condensation section, and the condensation section carries out heat convection with air to transfer the heat in the coal pile to outside air; thereby damaging the heat storage environment inside the coal seam, reducing the temperature of the oxidation zone and reducing the temperature of the coal pile; when the heat transfer is insufficient and spontaneous combustion occurs, the grouting device is started outside by monitoring the change of the temperature, and grouting fire extinguishing is started.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (8)
1. A quick heat transfer slip casting system which characterized in that: the grouting device comprises a grouting device, a temperature monitoring device, a temperature acquisition card, a working medium pipe, a sensing circuit, a temperature-sensitive detector and a grouting pipeline; the grouting device is arranged on one side of the temperature monitoring device, the working medium pipe is arranged at least one, the cross section of the working medium pipe is of a cylinder structure with an annular arrangement, the working medium pipe is arranged on the other side of the temperature monitoring system, the grouting device, the temperature monitoring device and the working medium pipe are sequentially arranged from left to right, one side of the grouting device is connected with the temperature monitoring system through a first lead, one side of the temperature monitoring system is connected with the working medium pipe through a temperature acquisition card, the temperature monitoring system is connected with the temperature acquisition card through a second lead, one side of the outer wall of the working medium pipe is provided with at least one temperature detector, and the temperature acquisition card is connected with the temperature detector through a sensing line; the working medium pipe is of a cylindrical structure with a circular cross section, the grouting pipeline is of a cylindrical structure with a circular cross section, the working medium pipe is coated on the outer surface of the grouting pipe, the axis of the grouting pipeline and the axis of the working medium pipe are coaxially distributed, the working medium pipe and the grouting pipe are arranged in a hollow structure, and the working medium pipe and the grouting pipe are sequentially provided with an evaporation section, an insulation section and a condensation section from bottom to top; according to the principles of compatibility, working temperature, heat conductivity, economy and environmental protection, the working medium pipe and the grouting pipeline are made of carbon steel pipes, a first plug is arranged at the upper end of the working medium pipe and comprises a first transverse plate and a first fixed block, the first fixed block is arranged on the lower surface of the first transverse plate, the diameter of the first fixed block is consistent with the inner diameter of the grouting pipeline, the diameter of the first transverse plate is consistent with the outer diameter of the working medium pipe, working medium liquid is arranged at the bottom of the inner surface of the evaporation section, the bottom of the grouting pipeline exceeds the working medium pipe by at least 10-80mm, the grouting device is communicated with the grouting pipe through a guide pipe, the grouting device is inserted into the grouting pipe by at least 5-18mm through the guide pipe and the first plug arranged above the grouting pipe, and a sealing ring is arranged between the bottom of the grouting pipeline and the bottom of the working medium pipe, the sealing ring axis and the grouting pipeline axis are coaxially distributed, a second plug is arranged at the lower end of the grouting pipeline, the diameter of the second plug is consistent with the inner diameter of the grouting pipeline, a plurality of holes are uniformly distributed on two sides of the outer surface of the grouting pipeline and the bottom of the second plug, the diameter of each hole is 0.3-68mm, the end part of each temperature sensing detector is inserted into each hole, and the temperature sensing detectors sense the temperature inside the holes; the collected temperature is transmitted to a temperature collecting card through a sensing circuit, and then is transmitted to a temperature monitoring device through the temperature collecting card, and the change in the coal pile is known through monitoring the temperature, so that the internal temperature can be well monitored, and the heat transfer can be obviously displayed; when the coal pile has coal bed heat accumulation caused by oxidation, the temperature-sensing detector detects the highest temperature point, and the evaporation section is arranged at the highest temperature point; then a high heat source in the coal pile can be used as a starting heat source of the evaporation section of the heat pipe, working medium in the heat pipe absorbs heat, the heat is heated and vaporized to be steam, the heat in the coal bed is transferred to the condensation section, and the condensation section carries out heat convection with air to transfer the heat in the coal pile to outside air; thereby damaging the heat storage environment inside the coal seam, reducing the temperature of the oxidation zone and reducing the temperature of the coal pile; when the heat transfer is insufficient and spontaneous combustion occurs, the grouting device is started outside by monitoring the change of the temperature, and grouting fire extinguishing is started.
2. The rapid heat removal grouting system of claim 1, wherein: the length of the working medium pipe is 1-80m, and the diameter of the working medium pipe is 0.2-10 m.
3. The rapid heat removal grouting system of claim 1, wherein: the length of the evaporation section is 2/5-1/3 of the length of the working medium pipe, the diameter of the evaporation section is consistent with the diameter of the working medium pipe, the length of the insulation section is 1/4-1/3 of the length of the working medium pipe, the diameter of the insulation section is consistent with the diameter of the working medium pipe, the length of the condensation section is 2/5-1/3 of the length of the working medium pipe, and the diameter of the condensation section is consistent with the diameter of the working medium pipe.
4. The rapid heat removal grouting system of claim 1, wherein: the length of the working medium pipe is 1/6-9/10 of the length of the grouting pipeline, and the diameter of the grouting pipeline is 1/4-2/3 of the diameter of the working medium pipe.
5. The rapid heat removal grouting system according to claim 1 or 2, characterized in that: the working temperature of the working medium pipe is 0-300 ℃, the working temperature of the methanol is 10-130 ℃, the working temperature of the water is 50-250 ℃, and the working medium liquid is a mixed liquid of the methanol and the water because the methanol is easily dissolved in the water, the boiling point is lower, the heat conductivity is high, and the working temperature is close to the working temperature of the water.
6. The rapid heat removal grouting system of claim 5, wherein: the ratio of methanol to water of the working medium liquid in the working medium pipe is as follows: (0.3-0.8): (0.7-0.2).
7. The rapid heat removal grouting system of claim 6, wherein: when the filling rate of the working medium liquid is 20-60%, the heat transfer capacity is good.
8. The rapid heat removal grouting system of claim 7, wherein: when the liquid filling rate of the working medium liquid is 40%, the heat transfer capacity is the best, so that the liquid filling rate is 40%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111330198A (en) * | 2020-03-30 | 2020-06-26 | 河南理工大学 | Intelligent grouting fire extinguishing system and grouting method |
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