A mine wellhead preheating system based on air compressor waste heat

Abstract

The present invention discloses a mine wellhead preheating system based on air compressor waste heat, which utilizes the waste heat of the air compressor to preheat the mine wellhead. The system includes an air compressor module, a waste heat recovery module, a wellhead transmission module, and a monitoring module. The air compressor module selects a heat source input module according to the ambient temperature and transmits the generated waste heat to the waste heat recovery module through a first transmission unit. The present invention discloses a mine wellhead preheating system based on air compressor waste heat, which reuses the waste heat generated by the air compressor working at the mine wellhead to preheat the mine wellhead. The system selects different heat source output modes according to actual needs through the wellhead transmission module, and monitors the output efficiency to adjust and control to obtain the best efficiency. The system has the advantages of energy saving and environmental protection, ease of use, and stable structure.

Description

Technical Field

[0001] The invention belongs to the technical field of mine wellhead preheating, and in particular relates to a mine wellhead preheating system based on waste heat of an air compressor. Background Art

[0002] The auxiliary shaft is relative to the main shaft and is an important link in the entire mining production process. During the underground mining production process, it is mainly responsible for the lifting and lowering of personnel, waste rock, equipment and materials, and also serves as an air intake shaft and safety exit; at the same time, drainage pipes are laid in the auxiliary shaft as a drainage channel for underground mining.

[0003] In the north or high-altitude areas, in order to prevent the wellhead from freezing in winter and threatening the safety of the hoisting system, according to the requirements of mine safety regulations, the air entering the auxiliary shaft wellhead must be preheated to ensure that the wellhead temperature is not lower than 2°C.

[0004] However, existing mine wellhead heating is all carried out by coal-fired boilers. Although it can be preheated, its efficiency is not high and the coal-fired boilers also cause smoke, dust and waste residue pollution to the surrounding environment.

[0005] Therefore, further improvements are made to the above problems. Summary of the Invention

[0006] The main purpose of the present invention is to provide a mine wellhead preheating system based on air compressor waste heat, which reuses the waste heat generated by the air compressor working at the mine wellhead to preheat the mine wellhead. It selects different heat source output modes according to actual needs through the wellhead transmission module, and monitors the output efficiency to adjust and control to obtain the best efficiency. It has the advantages of energy saving and environmental protection, easy use and stable structure.

[0007] To achieve the above objectives, the present invention provides a mine wellhead preheating system based on air compressor waste heat, which utilizes the air compressor waste heat to preheat the mine wellhead, including an air compressor module, a waste heat recovery module, a wellhead transmission module and a monitoring module, wherein:

[0008] The air compressor module selects a heat source input module according to the ambient temperature and transmits the generated waste heat to the waste heat recovery module through the first transmission unit, so that the waste heat recovery module performs heat exchange and outputs the output heat source to the wellhead transmission module;

[0009] The wellhead transmission module selects a heat source output module according to actual needs, so that the output heat source is output through the selected heat source output module;

[0010] The monitoring module monitors the wellhead preheating of the heat source output module to transmit the obtained monitoring data to the background management module, so that the background management module transmits the feedback information to the heat source output module after optimization processing, so that the heat source output module adjusts the output power of the output heat source, thereby obtaining the optimal preheating efficiency under the current ambient temperature (when the temperature is lower, the output power needs to be larger, which is adjusted with the ambient temperature and further fed back to the air compressor module, so that the air compressor module can adjust its work in real time).

[0011] As a further preferred technical solution of the above technical solution, the heat source output module includes a first heat source output unit, a second heat source output unit and a third heat source output unit, wherein:

[0012] When the first heat source output unit outputs the output heat source, the first heat source output unit (generally hot air) adjusts the output power according to the feedback information transmitted by the background management module and transmits the output heat source to the wellbore unit with the matching output power, so that the output heat source and the cold air are mixed in the wellbore unit, thereby increasing the air temperature in the wellbore to a preset range within a preset time, and transmitting the mixed air to the wellhead (the transmission is fast, and the hot and cold air are mixed in the wellbore, so that the mixed air can be quickly transmitted to a few meters below the wellhead. The disadvantage is that the temperature of the transmitted air is not very stable);

[0013] When the second heat source output unit outputs the output heat source, the second heat source output unit adjusts the output power according to the feedback information transmitted by the background management module and transmits the output heat source to the wellhead room unit with the matching output power, so that the output heat source and the cold air are mixed in the wellhead room unit, thereby increasing the air temperature in the wellhead room to a preset range within a preset time, and transmitting the mixed air to the wellhead through the wellbore (first, the cold and hot air are mixed in the wellhead room, and then the heated air is transmitted to a few meters underground through the wellbore. When it is transmitted underground, it is directly temperature-stable air, but the transmission speed is slower);

[0014] When the third heat source output unit outputs the output heat source, the third heat source output unit adjusts the output power according to the feedback information transmitted by the background management module and transmits a part (most of) the output heat source to the wellbore unit and another part (small part) to the wellhead room unit with matching output power, so that the output heat source and cold air are mixed in the wellbore unit and the wellhead room unit respectively, thereby making the air temperature in the wellbore and the wellhead room reach a preset range within a preset time, and the mixed air is transmitted to the wellhead through the wellhead room and the wellbore in turn (mixing cold and hot air in the wellbore and the wellhead room respectively can both transmit the heated air to the well and stabilize it).

[0015] As a further preferred technical solution of the above technical solution, the heat source input module includes a first heat source input module, a second heat source input module, and a third heat source input module, wherein:

[0016] The first heat source input module is selected when the ambient temperature is within a first temperature range, so that the first heat source input module is used as an input heat source and is transmitted to the air compressor module;

[0017] The second heat source input module is selected when the ambient temperature is in the second temperature range, so that the second heat source input module is transmitted to the air compressor module as an input heat source;

[0018] The third heat source input module is selected when the ambient temperature is within the third temperature range, so that the third heat source input module is used as an input heat source and is transmitted to the air compressor module;

[0019] The waste heat recovery module recovers the heat generated by the air compressor module.

[0020] As a further preferred technical solution of the above technical solution, when the first heat source input module is used as the input heat source, the air compressor module and the waste heat recovery module perform a first heat exchange process, wherein:

[0021] The air compressor module directly compresses the air input by the first heat source input module so that the generated first heat is recovered by the waste heat recovery module, and the efficiency detection module performs efficiency detection on the first heat exchange process to transmit the generated first thermal efficiency data to the background management module.

[0022] As a further preferred technical solution of the above technical solution, when the second heat source input module is used as the input heat source, the air compressor module and the waste heat recovery module perform a second heat exchange process, wherein:

[0023] The air compressor module directly compresses the air input from the second heat source input module, so that a portion of the generated second heat is recovered by the waste heat recovery module and another portion of the generated second heat is absorbed by the water stored in the second heat source input module, so that the heated water in the second heat source input module exchanges heat with the input air, and further, in a subsequent second heat exchange process, the air compressor module compresses the air that has exchanged heat with the water;

[0024] The efficiency detection module performs efficiency detection on the second heat exchange process to transmit the generated second thermal efficiency data to the background management module. After receiving the second thermal efficiency data, the background management module performs simulation calculations to obtain relevant data on the optimal efficiency of the second heat exchange process at the current temperature, and transmits the relevant data to the air compressor module so that the air compressor module adjusts the distribution of the second heat according to the relevant data.

[0025] As a further preferred technical solution of the above technical solution, when the third heat source input module is used as the input heat source, the air compressor module and the waste heat recovery module perform a third heat exchange process, wherein:

[0026] The air compressor module directly compresses the air input from the third heat source input module, so that a portion of the generated third heat is recovered by the waste heat recovery module and another portion of the generated third heat is absorbed by the oil stored in the third heat source input module, so that the heated oil in the third heat source input module exchanges heat with the input air, and further, in a subsequent third heat exchange process, the air compressor module compresses the air that has exchanged heat with the oil;

[0027] The efficiency detection module performs efficiency detection on the third heat exchange process to transmit the generated third thermal efficiency data to the background management module. After receiving the third thermal efficiency data, the background management module performs simulation calculations to obtain relevant data on the optimal efficiency of the third heat exchange process at the current temperature, and transmits the relevant data to the air compressor module so that the air compressor module adjusts the distribution of the third heat according to the relevant data.

[0028] As a further preferred technical solution of the above technical solution, the multi-heat source linkage air compressor unit also includes a drive selection module, which is respectively linked with the first heat source input module, the second heat source input module and the third heat source input module, so that the drive module drives the corresponding heat source to the air compressor module according to the ambient temperature. DETAILED DESCRIPTION

[0029] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0030] In the preferred embodiment of the present invention, those skilled in the art should note that the air compressor module and the like involved in the present invention may be regarded as prior art.

[0031] Preferred embodiment.

[0032] The present invention provides a mine wellhead preheating system based on air compressor waste heat, which uses the air compressor waste heat to preheat the mine wellhead, including an air compressor module, a waste heat recovery module, a wellhead transmission module and a monitoring module, wherein:

[0033] The air compressor module selects a heat source input module according to the ambient temperature and transmits the generated waste heat to the waste heat recovery module through the first transmission unit, so that the waste heat recovery module performs heat exchange and outputs the output heat source to the wellhead transmission module;

[0034] The wellhead transmission module selects a heat source output module according to actual needs, so that the output heat source is output through the selected heat source output module;

[0035] The monitoring module monitors the wellhead preheating of the heat source output module to transmit the obtained monitoring data to the background management module, so that the background management module transmits the feedback information to the heat source output module after optimization processing, so that the heat source output module adjusts the output power of the output heat source, thereby obtaining the optimal preheating efficiency under the current ambient temperature (when the temperature is lower, the output power needs to be larger, which is adjusted with the ambient temperature and further fed back to the air compressor module, so that the air compressor module can adjust its work in real time).

[0036] Specifically, the heat source output module includes a first heat source output unit, a second heat source output unit and a third heat source output unit, wherein:

[0037] When the first heat source output unit outputs the output heat source, the first heat source output unit (generally hot air) adjusts the output power according to the feedback information transmitted by the background management module and transmits the output heat source to the wellbore unit with the matching output power, so that the output heat source and the cold air are mixed in the wellbore unit, thereby increasing the air temperature in the wellbore to a preset range within a preset time, and transmitting the mixed air to the wellhead (the transmission is fast, and the hot and cold air are mixed in the wellbore, so that the mixed air can be quickly transmitted to a few meters below the wellhead. The disadvantage is that the temperature of the transmitted air is not very stable);

[0038] When the second heat source output unit outputs the output heat source, the second heat source output unit adjusts the output power according to the feedback information transmitted by the background management module and transmits the output heat source to the wellhead room unit with the matching output power, so that the output heat source and the cold air are mixed in the wellhead room unit, thereby increasing the air temperature in the wellhead room to a preset range within a preset time, and transmitting the mixed air to the wellhead through the wellbore (first, the cold and hot air are mixed in the wellhead room, and then the heated air is transmitted to a few meters underground through the wellbore. When it is transmitted underground, it is directly temperature-stable air, but the transmission speed is slower);

[0039] When the third heat source output unit outputs the output heat source, the third heat source output unit adjusts the output power according to the feedback information transmitted by the background management module and transmits a part (most of) the output heat source to the wellbore unit and another part (small part) to the wellhead room unit with matching output power, so that the output heat source and cold air are mixed in the wellbore unit and the wellhead room unit respectively, thereby making the air temperature in the wellbore and the wellhead room reach a preset range within a preset time, and the mixed air is transmitted to the wellhead through the wellhead room and the wellbore in turn (mixing cold and hot air in the wellbore and the wellhead room respectively can both transmit the heated air to the well and stabilize it).

[0040] More specifically, the heat source input module includes a first heat source input module, a second heat source input module, and a third heat source input module, wherein:

[0041] The first heat source input module is selected when the ambient temperature is within a first temperature range, so that the first heat source input module is used as an input heat source and is transmitted to the air compressor module;

[0042] The second heat source input module is selected when the ambient temperature is in the second temperature range, so that the second heat source input module is transmitted to the air compressor module as an input heat source;

[0043] The third heat source input module is selected when the ambient temperature is within the third temperature range, so that the third heat source input module is used as an input heat source and is transmitted to the air compressor module;

[0044] The waste heat recovery module recovers the heat generated by the air compressor module.

[0045] Furthermore, when the first heat source input module is used as the input heat source, the air compressor module and the waste heat recovery module perform a first heat exchange process, wherein:

[0046] The air compressor module directly compresses the air input by the first heat source input module so that the generated first heat is recovered by the waste heat recovery module, and the efficiency detection module performs efficiency detection on the first heat exchange process to transmit the generated first thermal efficiency data to the background management module.

[0047] Furthermore, when the second heat source input module (air and water) is used as the input heat source, the air compressor module and the waste heat recovery module perform a second heat exchange process, wherein:

[0048] The air compressor module directly compresses the air input from the second heat source input module, so that a portion of the generated second heat is recovered by the waste heat recovery module and another portion of the generated second heat is absorbed by the water stored in the second heat source input module, so that the heated water in the second heat source input module exchanges heat with the input air, and further, in a subsequent second heat exchange process, the air compressor module compresses the air that has exchanged heat with the water;

[0049] The efficiency detection module performs efficiency detection on the second heat exchange process to transmit the generated second thermal efficiency data to the background management module. After receiving the second thermal efficiency data, the background management module performs simulation calculations to obtain relevant data on the optimal efficiency of the second heat exchange process at the current temperature, and transmits the relevant data to the air compressor module so that the air compressor module adjusts the distribution of the second heat according to the relevant data (for the optimal distribution in which a part of the generated second heat is recovered by the waste heat recovery module and another part of the generated second heat is stored in the water absorption of the second heat source input module).

[0050] It is worth mentioning that the input heat sources in the second heat source input module are water and air. When the temperature is low, if air is directly used as the input heat source like the first heat source input module, the heat generated by the compression of the colder air will be greatly lost, thereby reducing the heat provided in the waste heat recovery module. Therefore, part of the heat generated by the compression of the air is first transferred to the water in the storage device of the second heat source input module so that the water is heated, and the heated water then heats the input cold air in the second heat source input module, so that a closed-loop heat exchange process is formed in the second heat source input module, and finally the temperature of the input air can reach the maximum waste heat efficiency through the distribution of the second heat.

[0051] Preferably, when the third heat source input module (air, oil) is used as the input heat source, the air compressor module and the waste heat recovery module perform a third heat exchange process, wherein:

[0052] The air compressor module directly compresses the air input from the third heat source input module, so that a portion of the generated third heat is recovered by the waste heat recovery module and another portion of the generated third heat is absorbed by the oil stored in the third heat source input module, so that the heated oil in the third heat source input module exchanges heat with the input air, and further, in a subsequent third heat exchange process, the air compressor module compresses the air that has exchanged heat with the oil;

[0053] The efficiency detection module performs efficiency detection on the third heat exchange process to transmit the generated third thermal efficiency data to the background management module. After receiving the third thermal efficiency data, the background management module performs simulation calculations to obtain relevant data on the optimal efficiency of the third heat exchange process at the current temperature, and transmits the relevant data to the air compressor module so that the air compressor module adjusts the distribution of the third heat according to the relevant data (for the optimal distribution in which a part of the generated third heat is recovered by the waste heat recovery module and another part of the generated third heat is stored in the oil absorption of the third heat source input module).

[0054] It is worth mentioning that the input heat sources in the third heat source input module are oil and air. When the temperature is low (between the first temperature range and the second temperature range), if air is directly used as the input heat source like the first heat source input module, the heat generated by the compression of the colder air will be greatly lost, thereby reducing the heat provided in the waste heat recovery module. However, since the temperature is not lower than the second temperature range and the specific heat capacity of oil is lower than that of water, heat exchange can be performed faster than water. Therefore, part of the heat generated by the compression of the air is first transferred to the oil in the storage device of the third heat source input module to heat the oil, and the heated oil then heats the input cold air in the third heat source input module, so that a closed-loop heat exchange process is formed in the third heat source input module, and finally the temperature of the input air can reach the maximum waste heat efficiency through the distribution of the third heat.

[0055] Preferably, the multi-heat source linked air compressor unit also includes a drive selection module, which is respectively linked with the first heat source input module, the second heat source input module and the third heat source input module, so that the drive module drives the corresponding heat source to the air compressor module according to the ambient temperature.

[0056] It is worth mentioning that the technical features such as the air compressor module involved in the patent application of this invention should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional choices in the field and should not be regarded as the inventive point of this patent. This patent will not be further elaborated.

[0057] For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mine wellhead preheating system based on air compressor waste heat, which uses the air compressor waste heat to preheat the mine wellhead, characterized in that: It includes air compressor module, waste heat recovery module, wellhead transmission module and monitoring module, among which: The air compressor module selects a heat source input module according to the ambient temperature and transmits the generated waste heat to the waste heat recovery module through the first transmission unit, so that the waste heat recovery module performs heat exchange and outputs the output heat source to the wellhead transmission module; The wellhead transmission module selects a heat source output module according to actual needs, so that the output heat source is output through the selected heat source output module; The monitoring module monitors the wellhead preheating of the heat source output module to transmit the obtained monitoring data to the background management module, so that the background management module transmits the feedback information to the heat source output module after optimization processing, so that the heat source output module adjusts the output power of the output heat source to obtain the optimal preheating efficiency under the current ambient temperature; The heat source output module includes a first heat source output unit, a second heat source output unit and a third heat source output unit, wherein: When the first heat source output unit outputs the output heat source, the first heat source output unit adjusts the output power according to the feedback information transmitted by the background management module and transmits the output heat source to the wellbore unit with the matching output power, so that the output heat source and the cold air are mixed in the wellbore unit, thereby increasing the air temperature in the wellbore to a preset range within a preset time, and transmitting the mixed air to the wellhead; When the second heat source output unit outputs the output heat source, the second heat source output unit adjusts the output power according to the feedback information transmitted by the background management module and transmits the output heat source to the wellhead room unit with the matching output power, so that the output heat source and the cold air are mixed in the wellhead room unit, thereby increasing the air temperature in the wellhead room to a preset range within a preset time, and transmitting the mixed air to the wellhead through the wellbore; When the third heat source output unit outputs the output heat source, the third heat source output unit adjusts the output power according to the feedback information transmitted by the background management module and transmits a part of the output heat source to the wellbore unit and the other part to the wellhead room unit with the matching output power, so that the output heat source and the cold air are mixed in the wellbore unit and the wellhead room unit respectively, so that the air temperature in the wellbore and the wellhead room reaches a preset range within a preset time, and the mixed air is transmitted to the wellhead through the wellhead room and the wellbore in sequence; The heat source input module includes a first heat source input module, a second heat source input module, and a third heat source input module, wherein: The first heat source input module is selected when the ambient temperature is within a first temperature range, so that the first heat source input module is used as an input heat source and is transmitted to the air compressor module; The second heat source input module is selected when the ambient temperature is in the second temperature range, so that the second heat source input module is transmitted to the air compressor module as an input heat source; The third heat source input module is selected when the ambient temperature is within the third temperature range, so that the third heat source input module is used as an input heat source and is transmitted to the air compressor module; The waste heat recovery module recovers the heat generated by the air compressor module; When the first heat source input module is used as the input heat source, the air compressor module and the waste heat recovery module perform a first heat exchange process, wherein: The air compressor module directly compresses the air input by the first heat source input module so that the generated first heat is recovered by the waste heat recovery module, and the efficiency detection module performs efficiency detection on the first heat exchange process to transmit the generated first thermal efficiency data to the background management module; When the second heat source input module is used as the input heat source, the air compressor module and the waste heat recovery module perform a second heat exchange process, wherein: The air compressor module directly compresses the air input from the second heat source input module, so that a portion of the generated second heat is recovered by the waste heat recovery module and another portion of the generated second heat is absorbed by the water stored in the second heat source input module, so that the heated water in the second heat source input module exchanges heat with the input air, and further, in a subsequent second heat exchange process, the air compressor module compresses the air that has exchanged heat with the water; The efficiency detection module performs efficiency detection on the second heat exchange process to transmit the generated second thermal efficiency data to the background management module. After receiving the second thermal efficiency data, the background management module performs simulation calculation to obtain relevant data of the optimal efficiency in the second heat exchange process at the current temperature, and transmits the relevant data to the air compressor module so that the air compressor module adjusts the distribution of the second heat according to the relevant data. When the third heat source input module is used as the input heat source, the air compressor module and the waste heat recovery module perform a third heat exchange process, wherein: The air compressor module directly compresses the air input from the third heat source input module, so that a portion of the generated third heat is recovered by the waste heat recovery module and another portion of the generated third heat is absorbed by the oil stored in the third heat source input module, so that the heated oil in the third heat source input module exchanges heat with the input air, and further, in a subsequent third heat exchange process, the air compressor module compresses the air that has exchanged heat with the oil; The efficiency detection module performs efficiency detection on the third heat exchange process to transmit the generated third heat efficiency data to the background management module. After receiving the third heat efficiency data, the background management module performs simulation calculation to obtain relevant data of the optimal efficiency of the third heat exchange process under the current temperature, and transmits the relevant data to the air compressor module so that the air compressor module adjusts the distribution of the third heat according to the relevant data. The multi-heat source linked air compressor unit also includes a drive selection module, which is respectively linked with the first heat source input module, the second heat source input module and the third heat source input module, so that the drive selection module drives the corresponding heat source to the air compressor module according to the ambient temperature.