CN106787951A - A kind of new heat pipe coal-field fire heat energy extracts electricity generation system - Google Patents

Abstract

The present invention is a novel heat pipe coalfield fire area thermal energy extraction power generation system, comprising a coalfield fire area (1), characterized in that it includes a borehole (2), a gravity heat conduction heat pipe (3), a thermoelectric power generation sheet group (4), a heat pipe Cooler (5), described gravity heat conduction heat pipe (3) is made of three parts of heat absorption section (3-1), heat insulation section (3-2), condensation section (3-3), and described multiple The thermoelectric power generation sheet (4) constitutes a thermoelectric power generation module, and the heat pipe cooler (5) is composed of two parts, a heat conduction copper block (5‑1) and a heat radiation heat pipe (5‑2). The structure of this system is simple and practical, easy to move and maintain, small in size and low in production cost, and can adapt to complex coal field fire conditions; the heat extraction rate is fast and the power generation is large. This system reduces the waste of heat energy and reduces the damage of coal fires to the environment. , At the same time, it better solves the problem of electricity consumption of workers in fire areas, living and residents in remote areas, and has great application value and development prospects.

Description

A new type of heat pipe coalfield heat extraction power generation system

technical field

The invention belongs to the technical field of waste heat energy recovery in coalfield fire areas, and specifically refers to the realization of thermal energy power generation in coalfield fire areas by utilizing heat pipe heat conduction technology and the principle of thermoelectric power generation.

Background technique

Coal fire refers to a large-area coalfield fire that is caused by coal burning due to oxidation and heat accumulation under natural environment or human factors and continues to develop. Coal fires are common in countries and regions such as India, the United States, Russia, Australia, Indonesia, and Central Asia, but coal fires are particularly serious in China. Spontaneous combustion of coal in coalfield fire areas not only has a huge impact on the economy, society and ecological environment, but also poses a great threat to human health and animal survival. At present, coal fire treatment generally adopts a comprehensive fire extinguishing method of stripping, drilling, water injection, grouting, and loess covering, but less work is carried out on the recovery and utilization of heat energy contained in the fire area. This invention combines heat pipe heat conduction and temperature difference power generation. It is of great significance to efficiently extract waste heat energy in coalfield fire areas and convert it into electrical energy, which solves the problem of electricity consumption for workers in fire areas and residents in remote areas.

The heat pipe is a special material with rapid temperature uniformity. Its hollow metal pipe body makes it light in weight, and its rapid temperature uniformity makes it have excellent thermal superconductivity; the earliest heat pipe It is used in the field of aerospace, and has already been used in various heat exchangers, coolers, etc. This invention firstly applies the heat pipe technology to the extraction of heat energy in coalfield fire areas, opening up a new direction for the application of heat pipes.

Contents of the invention

The purpose of the present invention is to propose a new type of heat pipe coal fire area heat energy extraction power generation system to realize efficient recycling of waste heat resources in coal field fire areas, aiming at the problems of local distribution of waste heat resources and waste of resources in coal field fire areas.

In order to solve the above-mentioned technical problems, the technical solution provided by the present invention is: a new type heat pipe coalfield fire area heat extraction power generation system, including drilling holes that go deep into the underground coalfield fire area, a thermoelectric power generation sheet group, a cooler, and a gravity heat conduction heat pipe, The gravity heat conduction heat pipe is composed of a condensing section, a heat insulating section and a heat absorbing section. The condensing section is placed on the ground, and the heat absorbing section goes deep into the borehole. The hot end of the thermoelectric generation sheet group described above is pasted on the outer surface of the condensation section of the new ultra-long heat conduction heat pipe, the cold end of the thermoelectric generation sheet group is in contact with the cooler 5, and the temperature difference formed between the hot end and the cold end realizes thermoelectric conversion.

Compared with the prior art, the present invention has the following beneficial effects: the present invention can utilize the existing grouting boreholes in coalfield fire areas to place super-long gravity heat pipes, and utilize the rapid heat conduction technology of super-long gravity heat pipes to realize the extraction of heat energy, It saves the construction cost, and indirectly takes away the heat of the fire area, reduces the temperature of the fire area, and speeds up the treatment of the fire area. Damage to the environment, and at the same time better solve the problems of workers in the fire area for construction, living, and residents in remote areas; the heat pipe cooling technology is used to minimize the temperature of the cold end of the thermoelectric power generation sheet, which maximizes the power generation; The new heat pipe coalfield fire area heat energy extraction power generation system has a simple and practical structure, is easy to move and maintain, is small in size and low in production cost, and can adapt to complex coal field fire area conditions. The heat extraction rate is fast and the power generation is large, which has great application value and development prospect.

The gravity heat conduction heat pipe has a heat conduction medium inside, and the heat conduction medium absorbs heat and vaporizes in the heat absorption section and moves upward, passes through the heat insulation section, liquefies and releases heat on the inner surface of the condensation section, and the liquefied heat conduction medium passes through the condensation section under the action of gravity The heat insulation section returns to the heat absorption section, where it absorbs heat and vaporizes again, and it goes round and round to form a circulation loop of heat energy extraction. The temperature drop from the heat absorption section of the gravity heat conduction heat pipe to the condensation section is small, which is the hot end of the thermoelectric power generation sheet group Higher temperature is provided, and this kind of heat pipe has high heat transfer efficiency and good effect.

As an improvement, the heat insulation section of the gravity heat conduction heat pipe includes a cylindrical structure and a circular frustum structure. The cylindrical structure is embedded below the ground, part of the structure of the heat insulation section is embedded in the ground, and a part is located on the ground. This structure has a good fixing effect.

As an improvement, the condensation section of the gravity heat conduction heat pipe is designed as a regular five-sided column on the ground. The side area of this kind of structure is larger and connected with the thermoelectric generating set.

As an improvement, the thermoelectric generation sheet group is composed of multiple sets of thermoelectric generation sheets connected in series and in parallel, which can realize the thermoelectric conversion of heat energy extracted from the gravity heat conduction heat pipe, and the required voltage can be realized by adjusting the series and parallel connection.

As an improvement, the heat pipe cooler is composed of two parts: a heat conduction copper block and a heat dissipation heat pipe. The heat conduction copper block is attached to the cold end of the thermoelectric power generation sheet group. The outer wall is inlaid with fins in contact with the air, reducing the temperature of the cold end of the thermoelectric power generation sheet group, maximizing the temperature difference between the cold and hot ends of the power generation sheet group, and increasing the power generation.

As an improvement, the borehole is equipped with a casing to prevent hole collapse, and the setting of the casing can enhance the stability of the borehole and prevent the borehole from collapsing.

Description of drawings

Fig. 1 is a structural front view of a novel heat pipe coalfield heat extraction power generation system of the present invention.

Fig. 2 is a top view of the structure of a novel heat pipe coalfield heat extraction power generation system of the present invention.

Fig. 3 is a structural schematic diagram of a new type of ultra-long gravity heat conduction heat pipe of a new type of heat pipe coalfield heat extraction power generation system of the present invention.

Fig. 4 is a structural schematic diagram of a heat pipe cooler of a novel heat pipe coalfield heat extraction power generation system of the present invention.

As shown in the figure: 1. Coal field fire area, 2. Drilling hole, 3. Gravity heat conduction heat pipe, 3-1. Heat absorption section, 3-2. Heat insulation section, 3-3. Condensation section, 4. Thermoelectric power generation sheet Group, 5, cooler, 5-1, heat conduction copper block, 5-2, heat dissipation heat pipe.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Combined with the accompanying drawings, a new heat pipe coalfield fire area heat energy extraction power generation system includes a drill hole 2 that goes deep into an underground coalfield fire area 1, a thermoelectric power generation sheet group 4, and a cooler 5. It is characterized in that it also includes a gravity heat conduction heat pipe 3, so The gravity heat conduction heat pipe 3 described above is composed of a condensation section 3-1, a heat insulation section 3-2 and a heat absorption section 3-3. The condensation section 3-1 is placed on the ground, and the heat absorption section 3-3 goes deep into the borehole 2. A heat insulation section 3-2 is provided between the condensation section 3-1 and the heat absorption section 3-3, and the hot end of the thermoelectric power generation sheet group 4 is attached to the condensation section 3-1 of the new super-long heat conduction heat pipe 3 On the outer surface, the cold end of the thermoelectric generation sheet group 4 is in contact with the cooler 5, and the temperature difference formed between the hot end and the cold end realizes thermoelectric conversion.

The gravity heat conduction heat pipe 3 has a heat conduction medium inside, and the heat conduction medium absorbs heat and vaporizes in the heat absorption section 3-3 and moves upward, passes through the heat insulation section 3-2, liquefies and releases heat on the inner surface of the condensation section 3-1, and the liquefied Under the action of gravity, the heat-conducting medium returns to the heat-absorbing section 3-3 from the condensing section 3-1 through the heat-insulating section 3-2, and then absorbs heat and vaporizes again in the heat-absorbing section 3-3. The temperature drop from the heat-absorbing section 3-3 to the condensing section 3-1 of the heat-conducting heat pipe 3 is small, which provides a higher temperature for the hot end of the thermoelectric generation sheet group 4 .

The heat insulation section 3-2 of the gravity heat conduction heat pipe 3 includes a cylindrical structure and a circular truncated structure, the cylindrical structure is embedded below the ground, and the diameter of the heat insulation section 3-2 is half larger than the diameter of the drilled hole and embedded below the ground

The condensation section 3-1 of the gravity heat conduction heat pipe 3 is designed as a regular five-sided column on the ground.

The thermoelectric generation sheet group 4 is composed of multiple sets of thermoelectric generation sheets connected in series and in parallel, which can realize the thermoelectric conversion of heat energy extracted from the gravity heat conduction heat pipe 3, and the required voltage can be realized by adjusting the series and parallel connections.

The heat pipe cooler 5 is composed of a heat conduction copper block 5-1 and a heat dissipation heat pipe 5-2. The heat conduction copper block 5-1 is attached to the cold end of the thermoelectric generation sheet group 4, and the heat absorption section of the heat dissipation heat pipe 5-2 Embedded inside the heat conduction copper block 5-1, the outer wall of the condensation section of the heat dissipation heat pipe 5-2 is inlaid with fins to contact with the air, reducing the temperature of the cold end of the thermoelectric generation sheet group 4, maximizing the temperature difference between the cold and hot ends of the generation sheet group 4, and improving Generating power.

A casing for preventing hole collapse is housed in the borehole 2 .

In a specific embodiment, the present invention can directly utilize the ground water injection/slurry drilling in the coal field fire area, and can also re-drill holes in the coal field fire area to arrange and install a new heat pipe coal field heat extraction power generation system. As long as the equipment is inserted into the borehole, it can be directly used for power generation without subsequent operations.

The device of the present invention can be installed on the fire area of the coal field to recover heat. The structure of the system is simple and practical, and it is easy to move and maintain. It extracts heat energy and performs distributed power generation according to the existing conditions of the fire area, reducing the waste of heat energy resources. At the same time, it better solves the electricity demand of residents and workers in remote areas, and has wide practicability.

The present invention and its implementations have been described above, and this description is not limiting. What is shown in the drawings is only one of the implementations of the present invention, and the actual structure is not limited thereto. All in all, if a person of ordinary skill in the art is inspired by it, and without departing from the inventive concept of the present invention, without creatively designing a structure and an embodiment similar to the technical solution, it shall fall within the scope of protection of the present invention.

Claims (6)

1. A novel heat pipe coalfield fire area thermal energy extraction power generation system, comprising a borehole (2) that goes deep into an underground coalfield fire area (1), a thermoelectric power generation sheet group (4), and a cooler (5), characterized in that: it also includes The gravity heat conduction heat pipe (3) has a heat conduction medium inside the gravity heat conduction heat pipe (3), and the gravity heat conduction heat pipe (3) is composed of a condensation section (3-1), a heat insulation section (3-2) and a heat absorption section (3 -3) composition, the condensation section (3-1) is placed on the ground, the heat absorption section (3-3) goes deep into the borehole (2), and the condensation section (3-1) and the heat absorption section (3-3) There is a heat insulation section (3-2) between them, and the hot end of the thermoelectric power generation sheet group (4) is attached to the outer surface of the condensation section (3-1) of the new ultra-long force heat conduction heat pipe (3), and the thermoelectric power generation The cold end of the sheet group (4) is in contact with the cooler (5), and the temperature difference formed between the hot end and the cold end realizes thermoelectric conversion. 2. A novel heat pipe coalfield heat extraction power generation system according to claim 1, characterized in that: the heat insulation section (3-2) of the gravity heat conduction heat pipe (3) includes a cylindrical structure and a circular truncated structure, The cylindrical structure is embedded below the ground. 3. A new type of heat pipe coalfield heat extraction power generation system according to claim 1, characterized in that: the condensation section (3-1) of the gravity heat conduction heat pipe (3) is designed as a five-sided column on the ground superior. 4. A novel heat pipe coalfield heat extraction power generation system according to claim 1, characterized in that: the thermoelectric power generation chip group (4) is composed of multiple sets of thermoelectric power generation chips connected in series and in parallel, which can realize the The gravity heat conduction heat pipe (3) extracts the thermoelectric conversion of heat energy, and the required voltage can be realized by adjusting the series and parallel connections. 5. A novel heat pipe coalfield heat extraction power generation system according to claim 1, characterized in that: the heat pipe cooler (5) consists of a heat conducting copper block (5-1), a heat dissipation heat pipe (5-2 ) consists of two parts, the heat conduction copper block (5-1) is pasted on the cold end of the thermoelectric power generation sheet group (4), the heat absorption section of the heat dissipation heat pipe (5-2) is embedded in the heat conduction copper block (5-1), and the heat dissipation heat pipe The outer wall of the condensing section of (5-2) is inlaid with fins to contact with the air, which reduces the temperature of the cold end of the thermoelectric generation sheet group (4), maximizes the temperature difference between the cold and hot ends of the generation sheet group (4), and improves the power generation. 6. A novel heat pipe coalfield heat extraction power generation system according to claim 1, characterized in that: the bore hole (2) is equipped with a casing to prevent the hole from collapsing.