阅读说明：本技术 矿井新风综合加热系统 (Mine fresh air comprehensive heating system ) 是由 王真光 于江 钟克志 杨子元 于 2020-06-22 设计创作，主要内容包括：本发明专利是一种矿井新风综合加热系统,矿井新风首先与矿井井口排风进行热交换,然后新风风管分成两路,第一路与电加热模块进行热交换,第二路与固体蓄热模块进行热交换；谷电时段第一路风管提供热风,非谷电时段第二路风管提供热风；固体蓄热设备蓄热量按照非谷电时段日总需求热量设计；第一风-风型热管式换热器的换热量按照谷电时段小时最大需求热量设计；第二风-风型热管式换热器的换热量按照非谷电时段小时最大需求热量设计；电加热模块加热功率按照谷电时段小时最大需求热量设计。减少了固体蓄热设备蓄热砖的用量,减小了设备体积,降低了热风加热系统的投资费用,同时对矿井排风的热量进行了回收利用,解决了排风口区域热污染问题。(The invention relates to a mine fresh air comprehensive heating system, wherein mine fresh air is firstly subjected to heat exchange with mine wellhead exhaust air, then a fresh air duct is divided into two paths, the first path is subjected to heat exchange with an electric heating module, and the second path is subjected to heat exchange with a solid heat storage module; the first air duct provides hot air in the valley power time period, and the second air duct provides hot air in the non-valley power time period; the heat storage capacity of the solid heat storage equipment is designed according to the total daily required heat in the off-peak electricity period; the heat exchange quantity of the first wind-wind type heat pipe heat exchanger is designed according to the maximum heat demand in the valley power period; the heat exchange quantity of the second wind-wind type heat pipe heat exchanger is designed according to the maximum heat demand in off-peak electricity time; the heating power of the electric heating module is designed according to the maximum heat demand in the valley electricity time period. The quantity of heat storage bricks of the solid heat storage equipment is reduced, the equipment volume is reduced, the investment cost of a hot air heating system is reduced, meanwhile, the heat exhausted by a mine is recycled, and the problem of thermal pollution of an air outlet area is solved.)

1. A mine fresh air comprehensive heating method utilizes mine wellhead exhaust waste heat, an electric heating module and a solid heat storage module to heat mine fresh air, and is characterized in that: the mine fresh air is firstly subjected to heat exchange with mine wellhead exhaust air, then a fresh air pipe is divided into two paths, wherein the first path of air pipe is connected with the electric heating module through a first air-air type heat pipe exchanger to realize the heat exchange between the fresh air and the electric heating module, and the second path of air pipe is connected with a second air-air type heat pipe exchanger to realize the heat exchange between the fresh air and the solid heat storage module; the hot air required by the wellhead is provided by the first air pipe in the valley power period, and the hot air required by the wellhead is provided by the second air pipe in the non-valley power period; when the equipment is selected, the heat storage capacity of the solid heat storage equipment is designed according to the total daily required heat in off-peak electricity periods; the heat exchange quantity of the first wind-wind type heat pipe heat exchanger is designed according to the maximum heat demand in the valley power period; the heat exchange quantity of the second wind-wind type heat pipe heat exchanger is designed according to the maximum heat demand in off-peak electricity time; the heating power of the electric heating module is designed according to the maximum heat demand in the valley period; the total required heat is the heat absorbed by the mine fresh air and the mine wellhead exhaust heat exchange subtracted from the mine hot air total heat.

2. The mine fresh air comprehensive heating method as claimed in claim 1, characterized in that: if the weather is extremely cold, the two paths of hot air are combined to provide hot air.

3. A mine fresh air comprehensive heating system for implementing the heating method of claim 1 or 2, which is characterized by comprising a rotary wheel type waste heat recovery device (1) as a waste heat recovery device, an electric heating module (3) and a solid heat storage device (5), and further comprising a first air-air type heat pipe type heat exchanger (2) and a second air-air type heat pipe type heat exchanger (4); the high-temperature air inlet end of the waste heat recovery device (1) is connected with a mine wellhead exhaust pipe (1-1), the air outlet end is connected with an outdoor exhaust pipe (1-2), the fresh air inlet end is connected with a first air pipe (1-3), and the fresh air outlet end is provided with a second air pipe (1-4); the second air pipe (1-4) is connected with a fresh air inlet of the first air-air type heat pipe exchanger (2) through a first electric air valve (1-4-1), is connected with a fresh air inlet of the second air-air type heat pipe exchanger (4) through a second electric air valve (1-4-2), a fresh air outlet of the first air-air type heat pipe exchanger (2) is connected with an air pipe (6) through a third air pipe (2-3), and a fresh air outlet of the second air-air type heat pipe exchanger (4) is connected with the air pipe (6) through a fourth air pipe (4-3); a hot air inlet of the first air-air type heat pipe type heat exchanger (2) is connected with an air outlet of the electric heating module (3) through a fifth air pipe (2-1), and a hot air outlet of the first air-air type heat pipe type heat exchanger (2) is connected with an air inlet of the electric heating module (3) through a sixth air pipe (2-2); the hot air inlet of the second air-air type heat pipe type heat exchanger (4) is connected with the air outlet of the solid heat storage equipment (5) through a seventh air pipe (4-1), and the hot air outlet of the second air-air type heat pipe type heat exchanger (4) is connected with the air inlet of the solid heat storage equipment (5) through an eighth air pipe (4-2).

4. A heating system according to claim 2 or 3, wherein the waste heat recovery device is a rotary wheel type waste heat recovery device.

Technical Field

The present invention relates to a heating system. In particular to a comprehensive system for heating fresh air used by a mine by utilizing mine exhaust waste heat and electric heating type solid heat storage equipment. The invention also relates to a comprehensive heating method for the fresh air in the mine.

Background

The winter time in northern areas of China is long, the outdoor temperature is low, for example, in the northern areas of China, the outdoor temperature is generally below-ten degrees in winter, and the temperature of a gas chamber reaches to twenty degrees below zero in extremely cold days or even lower. Therefore, the mine ventilation heating system has large heat load and large energy consumption. On the other hand, the annual temperature of mine exhaust air is about 18-30 ℃ according to incomplete statistics, the exhaust air volume is large, direct exhaust not only causes huge waste of heat energy, but also forms heat pollution in the exhaust air area. With the gradual promotion of the national policy of changing coal into electricity, coal-fired boilers adopted by the traditional mine ventilation heating system are increasingly limited, and accordingly, the improvement of the ventilation heating system for the mine by adopting a heat storage system is more and more emphasized.

The heat storage system is used for heating the heat storage equipment by utilizing valley electricity, and the heat storage equipment heats fresh air used by a mine in a non-valley electricity stage, so that the electricity cost is reduced. The existing method is to adopt a heat storage system to transform a ventilation heating system of a mine, and the problems of large installed capacity, large volume, large occupied area, high investment and the like of the heat storage equipment are faced, so that the heat storage equipment meets great resistance in the actual popularization process.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: by providing the mine fresh air comprehensive heating method and the mine fresh air comprehensive heating system, the mine exhaust heat, the electric heat energy and the heat energy of the heat storage equipment are optimally utilized, so that the installed capacity of the heat storage equipment is reduced, and the occupied area and the investment cost of the hot air heating system are further reduced.

The technical scheme of the invention is as follows:

a mine fresh air comprehensive heating method utilizes mine wellhead exhaust waste heat, an electric heating module and a solid heat storage module to heat mine fresh air, and is characterized in that: the mine fresh air is firstly subjected to heat exchange with mine wellhead exhaust air, then a fresh air pipe is divided into two paths, wherein the first path of air pipe is connected with the electric heating module through a first air-air type heat pipe exchanger to realize the heat exchange between the fresh air and the electric heating module, and the second path of air pipe is connected with a second air-air type heat pipe exchanger to realize the heat exchange between the fresh air and the solid heat storage module; the hot air required by the wellhead is provided by the first air pipe in the valley power period, and the hot air required by the wellhead is provided by the second air pipe in the non-valley power period; when the equipment is selected, the heat storage capacity of the solid heat storage equipment is designed according to the total daily required heat in off-peak electricity periods; the heat exchange quantity of the first wind-wind type heat pipe heat exchanger is designed according to the maximum heat demand in the valley power period; the heat exchange quantity of the second wind-wind type heat pipe heat exchanger is designed according to the maximum heat demand in off-peak electricity time; the heating power of the electric heating module is designed according to the maximum heat demand in the valley period; the total required heat is the heat absorbed by the mine fresh air and the mine wellhead exhaust heat exchange subtracted from the mine hot air total heat.

If the weather is extremely cold, the two paths of hot air are combined to provide hot air.

A mine fresh air comprehensive heating system is characterized by comprising a rotary wheel type waste heat recovery device, an electric heating module and a solid heat storage device, wherein the rotary wheel type waste heat recovery device is used as a waste heat recovery device; the high-temperature air inlet end of the waste heat recovery device is connected with an exhaust pipe at a mine well mouth, the exhaust end is connected with an outdoor exhaust pipe, the fresh air inlet end is connected with a first air pipe, and the fresh air outlet end is provided with a second air pipe; the second air pipe is connected with a fresh air inlet of the first air-air type heat pipe exchanger through a first electric air valve, the second air pipe is connected with a fresh air inlet of the second air-air type heat pipe exchanger through a second electric air valve, a fresh air outlet of the first air-air type heat pipe exchanger is connected with an air pipe through a third air pipe, and a fresh air outlet of the second air-air type heat pipe exchanger is connected with an air pipe through a fourth air pipe; the hot air inlet of the first air-air type heat pipe type heat exchanger is connected with the air outlet of the electric heating module through a fifth air pipe, and the hot air outlet of the first air-air type heat pipe type heat exchanger is connected with the air inlet of the electric heating module through a sixth air pipe; the hot air inlet of the second air-air type heat pipe heat exchanger is connected with the air outlet of the solid heat storage equipment through a seventh air pipe, and the hot air outlet of the second air-air type heat pipe heat exchanger is connected with the air inlet of the solid heat storage equipment through an eighth air pipe.

Preferably, the waste heat recovery device is a rotary wheel type waste heat recovery device.

Compared with the prior art, the invention has the following positive effects:

1. the optimized design of the invention can effectively reduce the consumption of the heat storage bricks of the solid heat storage equipment, the installed capacity of the solid heat storage equipment, the volume of the solid heat storage equipment, the floor area of the equipment room, the system investment and the system operating cost. The design of the invention can ensure that hot air does not pass through the non-working electric heating module when the heat storage module releases heat in off-peak electricity time period, thereby avoiding the short circuit of the fresh air, and can ensure that hot air does not pass through the heat storage module when the electric heating module releases heat in off-peak electricity time period, thereby avoiding influencing the heat storage of the heat storage module.

2. The wind-wind heat exchanger of the electric heating type solid heat storage equipment adopts a heat pipe type heat exchanger, completes heat exchange by means of phase change of injected media in the heat pipe, has the advantage of high heat transfer coefficient, and the heat transfer coefficient can be 5-10 times higher than that of a shell-and-tube type heat exchanger; the heat pipe heat exchanger can realize pure countercurrent heat exchange and has larger heat transfer temperature difference. Under the condition of transferring the same heat, the heat pipe heat exchanger needs a small heat transfer area and has good compactness, so that the occupied area and the metal consumption are reduced; the heat pipe elements are independent of each other, so the heat pipe elements have good replaceability and are convenient to maintain and overhaul; the areas of the heating section and the cooling section of the heat pipe can be adjusted manually, and the temperature of the pipe wall can be adjusted correspondingly, so that the dew point corrosion resistance is high, and even if one or more heat pipes are corroded to leak liquid, the mixing of cold and hot fluids can not be caused; the heat exchange of the cold fluid and the hot fluid is the heat exchange of the outside of the heat pipe, and the dust on the surface is easy to clean. .

3. According to the temperature distribution curve time by time of the coldest day in winter in the northern area, the occurrence time period of the maximum heat load required by a wellhead hot air heating system every day is generally 22: 00-8: 00, the time interval is just in the valley price electricity time interval, so the power adding module is started in the valley electricity time interval, and the system operation cost can be effectively reduced.

4. The invention carries out heat recovery on mine exhaust air through the rotary wheel type waste heat recovery system, the recovered used heat is used for preheating fresh air at the wellhead, and the fresh air is heated by the electric heating module or (and) the electric heat storage system and then is sent to the fresh air wellhead, thereby not only recycling heat energy, but also lightening heat pollution of the exhaust area.

Drawings

FIG. 1 is a schematic diagram of the working principle and the working flow of the embodiment of the present invention;

fig. 2 is a schematic structural view of a solid heat storage device in an embodiment of the present invention.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

The embodiment of the comprehensive mine fresh air heating method comprises the steps that mine fresh air is heated by utilizing waste heat of mine wellhead exhaust air, an electric heating module and a solid heat storage module, the mine fresh air is firstly subjected to heat exchange with the mine wellhead exhaust air, then a fresh air pipe is divided into two paths, wherein the first path of air pipe is connected with the first air-air type heat pipe exchanger to realize the heat exchange between the fresh air and the electric heating module, and the second path of air pipe is connected with the second air-air type heat pipe exchanger to realize the heat exchange between the fresh air and the solid heat storage module; the hot air required by the wellhead is provided by the first air pipe in the valley power period, and the hot air required by the wellhead is provided by the second air pipe in the non-valley power period; when the equipment is selected, the heat storage capacity of the solid heat storage equipment is designed according to the total daily required heat in off-peak electricity periods; the heat exchange quantity of the first wind-wind type heat pipe heat exchanger is designed according to the maximum heat demand in the valley power period; the heat exchange quantity of the second wind-wind type heat pipe heat exchanger is designed according to the maximum heat demand in off-peak electricity time; the heating power of the electric heating module is designed according to the maximum heat demand in the valley period; the total required heat is the heat absorbed by the mine fresh air and the mine wellhead exhaust heat exchange subtracted from the mine hot air total heat. If the weather is extremely cold, the two paths of hot air are combined to provide hot air.

The embodiment of the mine fresh air comprehensive heating system is as follows.

As shown in fig. 1, the present embodiment includes a rotary type waste heat recovery apparatus 1 as a waste heat recovery apparatus, an electric heating module 3, and a solid heat storage device 5.

The high-temperature air inlet end of the rotary wheel type waste heat recovery device 1 is connected with a mine wellhead exhaust pipe 1-1, the air outlet end is connected with an outdoor exhaust pipe 1-2, the fresh air inlet end is connected with a first air pipe 1-3, and the fresh air outlet end is provided with a second air pipe 1-4.

The present embodiment further includes a first wind-wind type heat pipe heat exchanger 2 and a second wind-wind type heat pipe heat exchanger 4.

The second air pipe 1-4 is connected with a fresh air inlet of the first air-air type heat pipe exchanger 2 through a first electric air valve 1-4-1, the second air pipe 1-4-2 is connected with a fresh air inlet of the second air-air type heat pipe exchanger 4, a fresh air outlet of the first air-air type heat pipe exchanger 2 is connected with an air pipe 6 through a third air pipe 2-3, and a fresh air outlet of the second air-air type heat pipe exchanger 4 is connected with the air pipe 6 through a fourth air pipe 4-3.

A hot air inlet of the first air-air type heat pipe exchanger 2 is connected with an air outlet of the electric heating module 3 through a fifth air pipe 2-1, and a hot air outlet of the first air-air type heat pipe exchanger 2 is connected with an air inlet of the electric heating module 3 through a sixth air pipe 2-2; the hot air inlet of the second air-air type heat pipe exchanger 4 is connected with the air outlet of the solid heat storage device 5 through a seventh air pipe 4-1, and the hot air outlet of the second air-air type heat pipe exchanger 4 is connected with the air inlet of the solid heat storage device 5 through an eighth air pipe 4-2.

The electric heating module 3 comprises a shell and an electric heating wire arranged in the shell, air heated by the electric heating wire in the shell circularly flows through the first air-air type heat pipe type heat exchanger 2, and high-temperature hot air after heat release returns to the electric heating module through the sixth air pipe 2-2 to be continuously heated. The high-temperature hot air circulation power comes from a high-temperature variable-frequency fan.

As shown in fig. 1 and 2, the solid thermal storage device 5 includes a housing and a plurality of thermal storage modules, which are a first thermal storage module 5-1, a second thermal storage module 5-2, and a third thermal storage module 5-3 in this embodiment, mounted in the housing. The heat storage module is provided with an electric heating wire and a heat storage brick. One side of the shell is provided with a high-temperature variable-frequency fan 7.

High-temperature hot air of the solid heat storage device 5 enters the second air-air type heat pipe type heat exchanger 4 through the seventh air pipe 4-1, and the high-temperature hot air after releasing heat returns to the solid heat storage device through the eighth air pipe 4-2 to be continuously heated.

The heat release of the solid heat storage device 5 and the electric heating module 3 is switched by opening and closing the first electric air valve 1-4-1 and the second electric air valve 1-4-2. In the valley power time period, the first electric air valve 1-4-1 is opened, the second electric air valve 1-4-2 is closed, the electric heating module 3 is electrified for heating to meet the mine hot air requirement in the valley power time period, and the heat storage module is electrified for heat storage; in the off-peak electricity time period, the first electric air valve 1-4-1 is closed, the second electric air valve 1-4-2 is opened, the heat storage module releases heat, and the requirement of mine hot air in the off-peak electricity time period is met. When extremely cold weather occurs, the first electric air valve 1-4-1 and the second electric air valve 1-4-2 can be opened simultaneously.

The mine includes coal mine, metal mine and other non-metal mine.