CN118640721A - Gravity heat pipe heat dissipation device and method for treating coal gangue hill - Google Patents
Gravity heat pipe heat dissipation device and method for treating coal gangue hill Download PDFInfo
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Abstract
The invention provides a gravity heat pipe heat dissipation device and a gravity heat pipe heat dissipation method for treating coal gangue dump, and belongs to the field of coal gangue dump treatment; solves the problems of low efficiency, complicated mode, high price, heat energy waste and the like of the traditional coal gangue hill treatment; the device comprises a gravity heat pipe inserted into a coal gangue hill, wherein a piezoelectric effect vibration device, a temperature difference power generation piece and a controllable frequency vibration device are arranged at a condensation section of the gravity heat pipe, the temperature difference power generation piece supplies power to the controllable frequency vibration device, a pressure sensor is also arranged in the condensation section of the gravity heat pipe, the pressure sensor is connected with a controller in the controllable frequency vibration device through a wire, the controller adjusts the alternating current frequency of the controllable frequency vibration device according to pressure data of working media in the gravity heat pipe collected by the pressure sensor, so that the vibration frequency of the piezoelectric effect vibration device is adjusted until the pressure data does not change obviously, and the heat dissipation efficiency of the gravity heat pipe is optimal at the moment; the invention is applied to the spontaneous combustion treatment of the coal gangue hill.
Description
Technical Field
The invention provides a gravity heat pipe heat dissipation device and a gravity heat pipe heat dissipation method for treating coal gangue dump, and belongs to the technical field of coal gangue dump treatment.
Background
The spontaneous combustion coal gangue hill is a special combustion system and has the characteristics of large heat accumulation and easiness in re-combustion. Spontaneous combustion often occurs in the coal and gangue hill piled in the open air, so that resource waste and environmental pollution are caused, and accidents are seriously caused.
Collapse is easy to cause after the spontaneous combustion coal gangue hill is burnt out, explosion accidents are easy to be caused when precipitation is met, and life health of mining areas is threatened. The ground temperature of the self-ignition coal gangue hill stacking area is higher than the normal ground temperature by more than 30 ℃, the self-ignition coal gangue hill stacking area is stressed by high temperature in the construction process of habitat and vegetation, the self-ignition control is difficult, and the ecological restoration is slow. Currently, conventional fire prevention and extinguishing technologies for treating spontaneous combustion of coal piles or coal gangue dump, such as grouting, loess covering and the like, mainly control the spontaneous combustion of the coal gangue dump from the angle of oxygen isolation. However, heat accumulated in the coal gangue hill cannot be timely dissipated, and reburning occurs more often along with time. The physical conditions for realizing the treatment of the spontaneous combustion coal gangue hill and restoring the surrounding ecological environment are critical, and the breaking of the heat aggregation is a critical subject to be solved urgently for the recovery of the mining area habitat.
The gravity heat pipe is a high-efficiency heat transfer element, has the advantages of simplicity, low price and the like, and is widely applied to various application fields such as renewable energy utilization, waste heat recovery, frozen soil protection, heat exchange of a base station air conditioning system, geothermal utilization, underground coal fire treatment and the like. The practical application of using the gravity heat pipe to treat the coal gangue hill is less, and meanwhile, when the gravity heat pipe is used to treat the coal gangue hill, the heat conducted by the heat pipe is usually directly emitted into the air, which is also a waste of heat energy.
Disclosure of Invention
The invention provides a gravity heat pipe heat dissipation device and a gravity heat pipe heat dissipation method for treating a coal gangue hill, which aim to solve the problems of low spontaneous combustion treatment efficiency, complicated mode, high price, waste of heat energy and the like of the traditional coal gangue hill.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a administer gravity heat pipe heat abstractor of gangue mountain, includes the gravity heat pipe of inserting in the inside of gangue mountain, installs piezoelectricity effect vibrating device, thermoelectric generation piece and controllable frequency vibrating device at the condensation segment of gravity heat pipe, thermoelectric generation piece is used for producing direct current and passes through the wire and transmit to controllable frequency vibrating device, controllable frequency vibrating device is used for converting direct current into alternating current to pass through the wire and transmit alternating current to piezoelectricity effect vibrating device, the condensation segment internally mounted of gravity heat pipe has pressure sensor, pressure sensor passes through the wire and links to each other with the inside controller of controllable frequency vibrating device, the controller is according to the pressure data of the inside working medium of gravity heat pipe that pressure sensor gathered, adjusts controllable frequency vibrating device's alternating current frequency to adjust piezoelectricity effect vibrating device's vibration frequency until pressure data does not have obvious change, and gravity heat pipe's radiating efficiency reaches the optimum this moment.
The thermoelectric generation piece is arranged outside the condensation section of the gravity heat pipe, and generates electric energy through the temperature difference between the surface of the gravity heat pipe and the outside air.
The controllable frequency vibration device is characterized in that an inverter and an alternating current frequency converter are further arranged inside the controllable frequency vibration device, the input end of the inverter is connected with the thermoelectric generation sheet through a wire, the output end of the inverter is connected with the input end of the alternating current frequency converter through a wire, the output end of the alternating current frequency converter is connected with the piezoelectric effect vibration device through a wire, and the control end of the alternating current frequency converter is connected with the controller through a wire.
The piezoelectric effect vibration device consists of an anode electrode plate, a cathode electrode plate and a medium crystal, wherein the medium crystal is positioned between the anode electrode plate and the cathode electrode plate and is tightly attached to the electrode plate;
The alternating current output by the frequency-controllable vibration device is transmitted to the positive electrode plate and the negative electrode plate of the piezoelectric effect vibration device through the lead.
The probe of the pressure sensor is placed in the gravity heat pipe, and the joint of the gravity heat pipe and the probe is welded.
A gravity heat pipe heat dissipation method for treating coal gangue hill adopts a gravity heat pipe heat dissipation device for treating coal gangue hill, which comprises the following steps:
Step one: determining a gravity heat pipe and an installation position thereof, and installing a piezoelectric effect vibration device, a thermoelectric generation sheet and a controllable frequency vibration device after the temperature of a condensation section of the gravity heat pipe is stable;
Step two: placing the thermoelectric generation sheet at a proper position of a condensation section of the gravity heat pipe, connecting the anode and the cathode of the thermoelectric generation sheet with the anode and the cathode of the input end of the controllable frequency vibration device through a wire, and connecting the anode and the cathode of the output end of the controllable frequency vibration device with the anode and the cathode of the piezoelectric effect vibration device through a wire;
Step three: distributing an initial alternating current frequency for the controllable frequency vibration device, wherein the piezoelectric effect vibration device can obtain an initial vibration frequency, then adjusting the alternating current frequency of the controllable frequency vibration device by the controller, so as to realize adjustment of the vibration frequency of the piezoelectric effect vibration device, recording pressure data collected by the pressure sensors of the piezoelectric effect vibration device under different vibration frequencies, automatically fitting a pressure curve, analyzing whether the pressure curve has a peak value by the controller, performing subsequent optimization if the pressure peak value exists, optimizing the adjusting range of the vibration frequency if the pressure peak value does not exist, and re-fitting the pressure curve until the pressure peak value exists;
step four: according to the pressure peak value determined in the third step, repartitioning a vibration frequency change interval near the pressure peak value, adjusting the vibration frequency of the piezoelectric effect vibration device, recording the pressure and fitting a curve;
step five: analyzing a pressure curve by using a controller, and continuously shrinking the gradient along with the change of the vibration frequency, when the vibration frequency is changed and the pressure is not changed obviously, proving that the vibration frequency is the optimal vibration frequency, otherwise, continuously shrinking the change interval of the vibration frequency;
step six: continuously adjusting the vibration frequency according to the reduced vibration frequency change interval, observing and recording the data of the pressure sensor until the vibration frequency is slightly changed to be a value near a pressure peak value, wherein the pressure data has no obvious fluctuation, and taking the vibration frequency as the optimal vibration frequency;
step seven: the alternating current frequency of the controllable frequency vibration device is dynamically controlled by the controller, so that the vibration frequency of the piezoelectric effect vibration device is always in an optimal state, and the optimal heat dissipation efficiency of the gravity assisted heat pipe is ensured.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention uses the heat in the self-ignition coal gangue hill to enhance the heat dissipation of the gravity heat pipe, thereby enhancing the treatment of the self-ignition of the coal gangue hill, and being a novel heat dissipation means.
2. The invention provides the gravity heat pipe which generates electric energy by self heat, and the electric energy is used for supplying power to the controllable frequency vibration device, so that the utilization of the heat in the coal gangue hill is realized.
3. According to the invention, the gravity heat pipe is optimized in a resonance mode, the vibration frequency can be freely adjusted under different environmental conditions, the mode is low in cost, the efficiency is higher, the application range is wide, and the flexibility is high.
4. The controller is utilized to automatically control the alternating current frequency of the controllable frequency vibration device, so that the adjustment of the vibration frequency of the piezoelectric effect vibration device is realized, the vibration frequency can be dynamically changed, and the vibration frequency can be adjusted when environmental conditions such as temperature and the like are changed.
In conclusion, the gravity assisted heat pipe can recycle waste energy, and simply and conveniently improve the heat dissipation efficiency of the gravity assisted heat pipe. The invention is suitable for gravity heat pipes with different parameter sizes and different environmental conditions, and has universality.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic view of the overall structure of the device of the present invention;
FIG. 2 is a front view of a body portion of the device of the present invention;
FIG. 3 is a flow chart of determining vibration frequency values in the method of the present invention;
In the figure: 1-coal gangue hill; 2-gravity assisted heat pipes; 3-piezoelectric effect vibration means; 4-thermoelectric generation sheets; 5-a controllable frequency vibration device; 6-pressure sensor.
Detailed Description
The invention provides a gravity heat pipe heat dissipation device for treating coal gangue hill, which is shown in fig. 1 to 3, and comprises a gravity heat pipe 2, wherein the gravity heat pipe 2 is inserted into the coal gangue hill 1, and the heat in the coal gangue hill 1 is conducted to the upper end of the gravity heat pipe 2, namely a condensation section (heat dissipation end), through the phase change of working medium, and the condensation section is in contact with the outside air to transfer the heat. The piezoelectric effect vibration device 3, the thermoelectric generation piece 4 and the controllable frequency vibration device 5 are arranged at the condensation section of the gravity heat pipe 2, the thermoelectric generation piece 4 generates direct current by utilizing the temperature difference between the surface of the gravity heat pipe 2 and the outside air, the thermoelectric generation piece 4 is connected with the controllable frequency vibration device 5 through a positive lead and a negative lead, and the controllable frequency vibration device 5 can convert the direct current into alternating current and transmit the alternating current to the piezoelectric effect vibration device 3. The piezoelectric effect vibration device 3 generates ultrasonic waves after being electrified, and vibrates the gravity assisted heat pipe 2 at a certain frequency. The alternating current frequency of the controllable frequency vibration device 5 can be changed, so that the vibration frequency of the piezoelectric effect vibration device 3 is changed, vibration is conducted to the internal working medium of the gravity heat pipe 2 through the inner wall of the gravity heat pipe 2, the working medium is more easily vaporized when being vibrated, the phase change efficiency of the working medium is enhanced, and the heat transfer efficiency of the gravity heat pipe 2 is improved. A pressure sensor 6 is arranged in the condensation section of the gravity heat pipe 2, and the pressure of gaseous working medium in the gravity heat pipe 2 is monitored through the pressure sensor 6.
Fig. 2 shows the installation details of the device, a thermoelectric generation sheet 4 is installed outside the condensation section of the gravity assisted heat pipe 2, a controllable frequency vibration device 5 is installed below the thermoelectric generation sheet 4, a piezoelectric effect vibration device 3 is installed below the controllable frequency vibration device 5, and the three are connected by a wire. The probe of the pressure sensor 6 is placed in the gravity heat pipe 2, and the joint of the gravity heat pipe 2 and the probe is welded, so that the heat dissipation efficiency is prevented from being influenced by the communication between the interior of the gravity heat pipe 2 and the outside air.
The piezoelectric effect vibration device 3 mainly comprises a positive electrode plate, a negative electrode plate and a dielectric crystal, and alternating current output by the controllable frequency vibration device 5 is transmitted to the positive electrode plate and the negative electrode plate through wires; the dielectric crystal is positioned between the positive electrode plate and the negative electrode plate and is tightly attached to the electrode plate; the medium crystal is KDP crystal or ADP crystal.
The controllable frequency vibration device 5 mainly comprises an inverter, an alternating current frequency converter and a controller, wherein the model of the inverter is YD28-800W bidirectional inversion module, and the alternating current frequency converter adopts ACS510 series frequency converters. The controllable frequency vibration device 5 can convert the direct current generated by the thermoelectric generation sheet 4 into alternating current, and can adjust the frequency of the alternating current.
On the basis of utilizing the gravity heat pipe 2 to treat spontaneous combustion of the coal gangue hill 1, in order to enhance the heat dissipation efficiency of the gravity heat pipe 2, the invention is additionally provided with a heat dissipation device at the condensation section, and the working principle of the heat dissipation device is as follows: the pressure sensor 6 is arranged inside the gravity assisted heat pipe 2, the pressure of gaseous working medium inside the gravity assisted heat pipe 2 is monitored, the signal of the pressure sensor 6 is received by the controller, and the alternating current frequency of the controllable frequency vibration device 5 is also controlled by the controller. The piezoelectric effect vibration device 3 generates ultrasonic waves after being electrified, the gravity heat pipe 2 is vibrated at a certain frequency, at the moment, the alternating current frequency of the controllable frequency vibration device 5 is changed, the controller is used for recording pressure change data of gaseous working medium in the gravity heat pipe 2 and automatically fitting a pressure curve, after analysis, the alternating current frequency of the controllable frequency vibration device 5 is continuously adjusted, namely, the vibration frequency of the piezoelectric effect vibration device 3 is continuously adjusted until the pressure data is basically unchanged, at the moment, the vibration frequency of the piezoelectric effect vibration device 3 is basically the same as the vibration frequency of the gravity heat pipe 2, the same-frequency resonance is realized, at the moment, the heat dissipation efficiency of the gravity heat pipe 2 is optimal, and the evaporation efficiency of the working medium is improved, namely, the heat dissipation efficiency of the gravity heat pipe 2 is improved.
The invention also provides a gravity assisted heat pipe heat dissipation method for treating coal gangue dump, which comprises the following steps:
Step one: selecting a gravity heat pipe 2 and the placement position of the gravity heat pipe 2, after the gravity heat pipe 2 is placed, not performing any treatment, and after the temperature of the condensation section of the gravity heat pipe 2 is stable, installing a piezoelectric effect vibration device 3, a thermoelectric generation sheet 4 and a controllable frequency vibration device 5;
Step two: placing the thermoelectric generation sheet 4 at a proper position of a condensation section of the gravity heat pipe 2, connecting the anode and the cathode of the thermoelectric generation sheet 4 with the anode and the cathode of the input end of the controllable frequency vibration device 5 through a wire, and connecting the anode and the cathode of the output end of the controllable frequency vibration device 5 with the anode and the cathode of the piezoelectric effect vibration device 3 through a wire;
Step three: an initial alternating current frequency is distributed for the controllable frequency vibration device 5, at this time, the piezoelectric effect vibration device 3 can obtain an initial vibration frequency, then the controller adjusts the alternating current frequency of the controllable frequency vibration device 5, so that the adjustment of the vibration frequency of the piezoelectric effect vibration device 3 is realized, pressure data collected by the pressure sensor 6 of the piezoelectric effect vibration device 3 under different vibration frequencies are recorded, a pressure curve is automatically fitted, the controller analyzes whether the pressure curve has a peak value, if the pressure peak value exists, the subsequent optimization is carried out, if the pressure peak value does not exist, the adjusting range of the vibration frequency is optimized, and the pressure curve is re-fitted until the pressure peak value exists;
Step four: according to the pressure peak value determined in the third step, repartitioning a vibration frequency change interval near the pressure peak value, adjusting the vibration frequency of the piezoelectric effect vibration device 3, recording the pressure and fitting a curve;
step five: analyzing a pressure curve by using a controller, and continuously shrinking the gradient along with the change of the vibration frequency, when the vibration frequency is changed and the pressure is not changed obviously, proving that the vibration frequency is the optimal vibration frequency, otherwise, continuously shrinking the change interval of the vibration frequency;
step six: continuously adjusting the vibration frequency according to the reduced vibration frequency change interval, observing and recording the data of the pressure sensor 6 until the vibration frequency is slightly changed to be a value near a pressure peak value, and taking the vibration frequency as the optimal vibration frequency at the moment when the pressure data has no obvious fluctuation;
Step seven: the alternating current frequency of the controllable frequency vibration device 5 is dynamically controlled by the controller, so that the vibration frequency of the piezoelectric effect vibration device 3 is always in an optimal state, and the optimal heat dissipation efficiency of the gravity assisted heat pipe 2 is ensured.
In the third step, the specific process of adjusting the vibration frequency of the piezoelectric effect vibration device 3 by the controller is as follows: the alternating current generated by the controllable frequency vibration device 5 drives the piezoelectric effect vibration device 3 to generate a vibration frequency, and then the frequency of the alternating current generated by the controllable frequency vibration device 5 is regulated by the controller, so that the purpose of regulating the vibration frequency of the piezoelectric effect vibration device 3 is achieved. After the initial vibration frequency is distributed, the alternating current frequency of the controllable frequency vibration device 5 is continuously regulated by the controller, so that the piezoelectric effect vibration device 3 reaches the optimal vibration frequency.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (6)
1. The utility model provides a administer gravity heat pipe heat abstractor of gangue mountain, includes inserts gravity heat pipe (2) in gangue mountain (1) inside, its characterized in that: the device comprises a piezoelectric effect vibration device (3), a thermoelectric generation sheet (4) and a controllable frequency vibration device (5) which are arranged at the condensation section of a gravity heat pipe (2), wherein the thermoelectric generation sheet (4) is used for generating direct current and transmitting the direct current to the controllable frequency vibration device (5) through a wire, the controllable frequency vibration device (5) is used for converting the direct current into alternating current and transmitting the alternating current to the piezoelectric effect vibration device (3) through the wire, a pressure sensor (6) is arranged in the condensation section of the gravity heat pipe (2), the pressure sensor (6) is connected with a controller in the controllable frequency vibration device (5) through the wire, and the controller adjusts the alternating current frequency of the controllable frequency vibration device (5) according to pressure data in the gravity heat pipe (2) acquired by the pressure sensor (6), so that the vibration frequency of the piezoelectric effect vibration device (3) is adjusted until the pressure data does not change obviously, and the heat dissipation efficiency of the gravity heat pipe (2) is optimal.
2. The gravity assisted heat pipe heat dissipation device for treating coal gangue hill according to claim 1, wherein: the thermoelectric generation piece (4) is arranged outside the condensation section of the gravity heat pipe (2), and generates electric energy through the temperature difference between the surface of the gravity heat pipe (2) and the outside air.
3. The gravity assisted heat pipe heat dissipation device for treating coal gangue hill according to claim 1, wherein: the controllable frequency vibration device (5) is internally provided with an inverter and an alternating current frequency converter, the input end of the inverter is connected with a thermoelectric generation sheet (4) through a wire, the output end of the inverter is connected with the input end of the alternating current frequency converter through a wire, the output end of the alternating current frequency converter is connected with a piezoelectric effect vibration device (3) through a wire, and the control end of the alternating current frequency converter is connected with a controller through a wire.
4. A gravity assisted heat pipe heat sink for managing coal gangue hill as claimed in claim 3, wherein: the piezoelectric effect vibration device (3) consists of a positive electrode plate, a negative electrode plate and a medium crystal, wherein the medium crystal is positioned between the positive electrode plate and the negative electrode plate and is tightly attached to the electrode plates;
the alternating current output by the frequency-controllable vibration device (5) is transmitted to the positive electrode plate and the negative electrode plate of the piezoelectric effect vibration device (3) through wires.
5. The gravity assisted heat pipe heat dissipation device for treating coal gangue hill according to claim 1, wherein: the probe of the pressure sensor (6) is placed in the gravity heat pipe (2), and the joint of the gravity heat pipe and the probe is welded.
6. A gravity assisted heat pipe heat dissipation method for treating coal gangue hill, which adopts the gravity assisted heat pipe heat dissipation device for treating coal gangue hill according to any one of claims 1-5, and is characterized in that: the method comprises the following steps:
Step one: determining a gravity heat pipe (2) and the installation position thereof, and installing a piezoelectric effect vibration device (3), a thermoelectric generation sheet (4) and a controllable frequency vibration device (5) after the temperature of a condensation section of the gravity heat pipe (2) is stable;
step two: placing a thermoelectric generation sheet (4) at a proper position of a condensation section of a gravity heat pipe (2), connecting the anode and the cathode of the thermoelectric generation sheet (4) with the anode and the cathode of the input end of a controllable frequency vibration device (5) through a lead, and connecting the anode and the cathode of the output end of the controllable frequency vibration device (5) with the anode and the cathode of a piezoelectric effect vibration device (3) through a lead;
Step three: an initial alternating current frequency is distributed for the controllable frequency vibration device (5), at the moment, the piezoelectric effect vibration device (3) can obtain an initial vibration frequency, then the controller is used for adjusting the alternating current frequency of the controllable frequency vibration device (5), so that the adjustment of the vibration frequency of the piezoelectric effect vibration device (3) is realized, pressure data collected by the pressure sensors (6) of the piezoelectric effect vibration device (3) under different vibration frequencies are recorded and a pressure curve is automatically fitted, the controller analyzes whether the pressure curve has a peak value, if the pressure peak value exists, the follow-up optimization is carried out, if the pressure peak value does not exist, the adjusting range of the vibration frequency is optimized, and the pressure curve is re-fitted until the pressure peak value appears;
Step four: according to the pressure peak value determined in the third step, repartitioning a vibration frequency change interval near the pressure peak value, adjusting the vibration frequency of the piezoelectric effect vibration device (3), recording the pressure and fitting a curve;
step five: analyzing a pressure curve by using a controller, and continuously shrinking the gradient along with the change of the vibration frequency, when the vibration frequency is changed and the pressure is not changed obviously, proving that the vibration frequency is the optimal vibration frequency, otherwise, continuously shrinking the change interval of the vibration frequency;
Step six: continuously adjusting the vibration frequency according to the reduced vibration frequency change interval, observing and recording data of the pressure sensor (6) until the vibration frequency is slightly changed to be a value near a pressure peak value, wherein the pressure data has no obvious fluctuation, and taking the vibration frequency as an optimal vibration frequency;
Step seven: the alternating current frequency of the controllable frequency vibration device (5) is dynamically controlled by the controller, so that the vibration frequency of the piezoelectric effect vibration device (3) is always in an optimal state, and the optimal heat dissipation efficiency of the gravity assisted heat pipe (2) is ensured.
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