CN107339081B - System for carrying out shaft heat preservation by using mine ventilation air methane waste heat and control method - Google Patents
System for carrying out shaft heat preservation by using mine ventilation air methane waste heat and control method Download PDFInfo
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- CN107339081B CN107339081B CN201710753134.4A CN201710753134A CN107339081B CN 107339081 B CN107339081 B CN 107339081B CN 201710753134 A CN201710753134 A CN 201710753134A CN 107339081 B CN107339081 B CN 107339081B
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- 238000009423 ventilation Methods 0.000 title claims abstract description 311
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 156
- 239000002918 waste heat Substances 0.000 title claims abstract description 32
- 238000004321 preservation Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000002844 melting Methods 0.000 claims abstract description 71
- 230000008018 melting Effects 0.000 claims abstract description 59
- 238000001914 filtration Methods 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims abstract description 20
- 238000013461 design Methods 0.000 claims description 17
- 238000005485 electric heating Methods 0.000 claims description 15
- 208000027418 Wounds and injury Diseases 0.000 claims description 5
- 238000010309 melting process Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000008014 freezing Effects 0.000 claims description 3
- 238000007710 freezing Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 230000006378 damage Effects 0.000 claims 1
- 208000014674 injury Diseases 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000003245 coal Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000003287 bathing Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009746 freeze damage Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
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- 238000012827 research and development Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
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- Geochemistry & Mineralogy (AREA)
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a system for carrying out shaft heat preservation by using mine ventilation air waste heat, which comprises a ventilation air induced air duct, an air duct valve, a ventilation air filtering system, a high-temperature section heat pipe heat exchanger, a ventilation air communication duct, a ventilation air side ice melting switching air valve, a low-temperature Duan Reguan heat exchanger and a ventilation air exhaust duct which are sequentially connected, wherein a ventilation air induced fan is arranged on the ventilation air exhaust duct; the fresh air induced air duct is sequentially provided with a fresh air filter and a fresh air blower, and the fresh air induced air duct, the fresh air side ice melting switching air valve, the low-temperature Duan Reguan heat exchanger, the fresh air communication duct, the high-temperature section heat pipe heat exchanger and the fresh air exhaust duct are sequentially connected; the low temperature Duan Reguan heat exchanger includes an a-side low temperature Duan Reguan heat exchanger and a b-side low temperature Duan Reguan heat exchanger in parallel. The invention also provides a control method of the system for carrying out heat preservation on the shaft by using the waste heat of the ventilation air methane of the mine. The invention can obtain better heat exchange effect at 15-20 ℃ and is convenient for treating low-temperature icing problem at the ventilation air side.
Description
Technical Field
The invention belongs to the technical field of coal mine energy conservation, and particularly relates to a system and a control method for heat preservation of a shaft by using waste heat of ventilation air methane of a mine.
Background
The heat preservation of the coal mine shaft is an indispensable link for the safe production of the coal mine in winter, in particular to the northern area of the north of the Huaihe river.
Currently, coal-fired boilers are generally adopted for heat preservation of shafts to provide heat sources. But the small coal-fired boiler of colliery pit shaft heat preservation configuration faces to shut down under the influence of national environmental protection policy. Therefore, how to realize safe production of a shaft in winter after the coal-fired boiler is shut down becomes a technical problem to be solved in the coal mine in northern areas.
Generally, if the mining area is used for rich mine water resources or gas waste heat resources, the problem of heat preservation of the shaft can be easily solved, and even the heat for heating and bathing of the whole mining area can be supplied. However, for coal mines with low gas, little water and even no mine water, heat insulation and heat extraction of the shaft have certain difficulty.
Coal mines with low gas and less mine water, and mine ventilation air is the only waste heat resource. Research and development are made by some institutions in China about extracting waste heat of ventilation air methane for heat preservation of a shaft. For example, a patent (patent application number 2008200173439) named as a mine ventilation air heat energy utilization device adopts a spray heat exchange mode to recycle ventilation air waste heat to spray circulating water, and then the spray circulating water is supplied to a water source heat pump system for use to prepare hot water supply pit shaft heat preservation or industrial and wide area heating and bathing; in a patent (patent application number 2011203916168) named as mine ventilation air methane waste heat utilization device, an air source heat pump evaporator is placed in a ventilation air methane environment, ventilation air methane waste heat is recovered through evaporation of a refrigerating medium, and then hot water produced by a heat pump unit is supplied to a shaft for heat preservation or industrial and wide area heating and bathing; or the deepening and the combination of the two, such as a patent (patent application number 2013107037587) named as a mine ventilation air methane and waste heat mixed heat-taking heat pump system, and the like. The patent (patent application number 201320398077X) named as 'a device for realizing shaft freezing prevention by using return air heat energy' is to use water as an intermediate medium, obtain ventilation air heat through a heat exchanger (the type and the structure of the heat exchanger are not illustrated), and then heat the shaft to supply air through the waste heat obtained by the heat exchanger; the patent (patent application number 201310600764X) entitled "Large temperature differential wellhead Heater and its operation mode" mentions that a heat absorber and a preheater (the mechanism and the type of the heat exchanger are not illustrated) are adopted to recover the waste heat of ventilation air for preheating the shaft air supply.
In summary, there are two modes of mine ventilation air waste heat recovery, one is heat pump heating, hot water is prepared for heat preservation of a shaft or heating and bathing of a work and mining area, and the other is that heat is obtained through a certain heat exchange working medium and then the heat obtained by the working medium is used for air supply and heating of the shaft through a heat exchanger.
For the heat pump heat-taking mode, the defects of high manufacturing cost, complex system, high energy consumption and the like exist in both spray heat exchange and direct steam heat exchange. Especially, the spraying heat exchange is carried out, once the temperature of the ventilation air is low, the heat extraction is difficult, and the waste heat resources of the temperature section of the ventilation air below 10 ℃ are difficult to obtain.
For the heat-exchanging working medium heat-taking mode, any heat exchanging mode must have reasonable and enough heat exchanging temperature difference, otherwise, the system cannot complete effective heat transfer, for example, the reasonable economic heat exchanging end difference (the difference between the inlet temperature of the heat exchanger hot fluid and the outlet temperature of the cold fluid) of the gas-liquid heat exchanging mode is 15-40 ℃, and the reasonable economic heat exchanging end difference of the gas-evaporation (or condensation) phase-change heat exchanging mode is 10-20 ℃. For mine ventilation air of 15-25 ℃ and shaft air intake (outdoor fresh air) of-20-2 ℃, no matter whether a gas-water heat exchange mode is adopted, for example, a patent (patent application number 201320398077X) named as a device for realizing shaft freezing prevention by using return air heat energy, or a gas-evaporation (condensation) phase change heat exchange mode is adopted, for example, a patent (patent application number 201310600764X) named as a large-temperature-difference wellhead heater and an operation mode thereof, the heat exchange end difference obviously cannot meet the requirement of twice heat exchange, that is, the practical application has great difficulty.
In addition, for the gas-liquid heat exchange mode or the gas-evaporation (or condensation) phase change heat exchange mode, a great amount of condensate water is necessarily condensed in the heat taking process of the mine ventilation air methane, and once the temperature is lower than 0 ℃, the mine ventilation air methane can be frozen (frosted) on the heat exchanger, the heat exchange effect is affected slightly, and the heat exchanger is destroyed seriously, so that the safety accident is caused. How to solve the problems is not mentioned in the current research on ventilation air waste heat recovery.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a system and a control method for heat preservation of a shaft by using waste heat of ventilation air methane of a mine aiming at a coal mine with a ventilation air methane well and a main and auxiliary well with relatively close distances.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
A system for carrying out shaft heat preservation by using mine ventilation air waste heat comprises a ventilation air induced duct, an a-side duct valve, a b-side duct valve, an a-side ventilation air filtering system, a b-side ventilation air filtering system, a high-temperature section heat pipe heat exchanger, a ventilation air communication duct, an a-side ventilation air side ice melting switching duct valve, a b-side ventilation air side ice melting switching duct valve, an a-side low-temperature Duan Reguan heat exchanger, a b-side low-temperature Duan Reguan heat exchanger, a ventilation air induced fan, a ventilation air exhaust duct, a fresh air induced duct, a fresh air blower, a fresh air filter, an a-side fresh air side ice melting switching duct valve, a b-side fresh air side ice melting switching duct, a fresh air communication duct and a fresh air exhaust duct.
The ventilation air duct is respectively connected with an a-side ventilation air duct valve and a b-side ventilation air duct valve, the a-side ventilation air duct valve is connected with an a-side ventilation air duct filtering system, the b-side ventilation air duct valve is connected with a b-side ventilation air duct filtering system, the a-side ventilation air duct filtering system and the b-side ventilation air duct filtering system are both connected with a ventilation air inlet of the high-temperature section heat pipe heat exchanger, a ventilation air outlet of the high-temperature section heat pipe heat exchanger is connected with a ventilation air communication duct, the ventilation air communication duct is respectively connected with an a-side ventilation air duct side deicing switching air valve and a b-side ventilation air duct side deicing switching air valve, the a-side ventilation air duct side deicing switching air valve is connected with a ventilation air inlet of the a-side low-temperature Duan Reguan heat exchanger, the b-side ventilation air duct side deicing switching air valve is connected with a ventilation air inlet of the b-side low-temperature Duan Reguan heat exchanger, a ventilation air outlet of the a-side low-temperature Duan Reguan heat exchanger and a ventilation air duct of the b-side low-temperature Duan Reguan heat exchanger are both connected with a ventilation air duct, and a ventilation air induced draft fan is arranged on the ventilation air duct.
The fresh air guiding air duct is sequentially provided with a fresh air filter and a fresh air blower, the fresh air guiding air duct is respectively connected with a fresh air inlet of the a-side low-temperature Duan Reguan heat exchanger and a fresh air inlet of the b-side low-temperature Duan Reguan heat exchanger through an a-side fresh air side ice melting switching air valve and a b-side fresh air side ice melting switching air valve, a fresh air outlet of the a-side low-temperature Duan Reguan heat exchanger and a fresh air outlet of the b-side low-temperature Duan Reguan heat exchanger are both connected with a fresh air inlet of the high-temperature section heat pipe heat exchanger through a fresh air communication air duct, and a fresh air outlet of the high-temperature section heat pipe heat exchanger is connected with a fresh air exhaust air duct.
The high-temperature section heat pipe heater comprises a high-temperature section heat pipe heater ventilation air passage and a high-temperature section heat pipe heater fresh air passage, wherein the high-temperature section heat pipe heater ventilation air passage is respectively connected with a ventilation air inlet of the high-temperature section heat pipe heat exchanger and a ventilation air outlet of the high-temperature section heat pipe heat exchanger, and the high-temperature section heat pipe heater fresh air passage is connected with a fresh air inlet of the high-temperature section heat pipe heat exchanger and a fresh air outlet of the high-temperature section heat pipe heat exchanger; the high temperature section heat pipe heater is internally provided with at least one group of heat pipe bundles and a combination of drainage flow channels, the heat pipe bundles comprise four rows of heat pipes which are arranged in a staggered mode, each heat pipe comprises a core pipe and fins, and the heat pipes penetrate through a ventilation air channel of the high temperature section heat pipe heater and a fresh air channel of the high temperature section heat pipe heater.
Furthermore, the heat pipe in the ventilation air passage of the high-temperature section heat pipe heater adopts annular ribs.
The a-side low-temperature Duan Reguan heater comprises an a-side low-temperature Duan Reguan heater ventilation air passage and an a-side low-temperature Duan Reguan heater fresh air passage, wherein the a-side low-temperature Duan Reguan heater ventilation air passage is respectively connected with a ventilation air inlet of the a-side low-temperature Duan Reguan heat exchanger and a ventilation air outlet of the a-side low-temperature Duan Reguan heat exchanger, and the a-side low-temperature Duan Reguan heater fresh air passage is connected with a fresh air inlet of the a-side low-temperature Duan Reguan heat exchanger and a fresh air outlet of the a-side low-temperature Duan Reguan heat exchanger; the a-side low temperature Duan Reguan heater is internally provided with at least one group of heat pipe bundles and a drainage runner, the heat pipe bundles comprise four rows of heat pipes which are arranged in a staggered manner, each heat pipe comprises a core pipe and fins, and the heat pipes penetrate through a ventilation air channel of the a-side low temperature Duan Reguan heater and a fresh air channel of the a-side low temperature Duan Reguan heater.
The b-side low-temperature Duan Reguan heater comprises a b-side low-temperature Duan Reguan heater ventilation air passage and a b-side low-temperature Duan Reguan heater fresh air passage, wherein the b-side low-temperature Duan Reguan heater ventilation air passage is respectively connected with a ventilation air inlet of the b-side low-temperature Duan Reguan heat exchanger and a ventilation air outlet of the b-side low-temperature Duan Reguan heat exchanger, and the b-side low-temperature Duan Reguan heater fresh air passage is connected with a fresh air inlet of the b-side low-temperature Duan Reguan heat exchanger and a fresh air outlet of the b-side low-temperature Duan Reguan heat exchanger; the b-side low temperature Duan Reguan heater is internally provided with at least one group of heat pipe bundles and a drainage runner, the heat pipe bundles comprise four rows of heat pipes which are arranged in a staggered manner, each heat pipe comprises a core pipe and fins, and the heat pipes penetrate through a ventilation air channel of the b-side low temperature Duan Reguan heater and a fresh air channel of the b-side low temperature Duan Reguan heater.
Further, the heat pipes of the ventilation air passage of the low-temperature Duan Reguan heater on the a side and the ventilation air passage of the low-temperature Duan Reguan heater on the b side adopt spiral ribs, and the roots of the spiral ribs are wound with electric heating wires.
The combined distance between each group of heat pipe bundles and the drainage flow channel is more than 1000mm, so that the cleaning pipe bundles can be conveniently entered manually.
The fresh air outlet of the high-temperature section heat pipe heat exchanger is provided with a fresh air outlet temperature sensor.
The fresh air inlet of the high-temperature section heat pipe heat exchanger is provided with a fresh air inlet temperature sensor of the high-temperature section heat pipe heat exchanger.
The ventilation air inlet temperature sensor of the high-temperature section heat pipe heat exchanger is arranged at the ventilation air inlet of the high-temperature section heat pipe heat exchanger.
The ventilation air outlet of the high-temperature section heat pipe heat exchanger is provided with a ventilation air outlet temperature sensor.
The fresh air inlet of the a-side low-temperature Duan Reguan heat exchanger is provided with a fresh air inlet temperature sensor of the a-side low-temperature Duan Reguan heat exchanger.
The fresh air outlet of the a-side low-temperature Duan Reguan heat exchanger is provided with a fresh air outlet temperature sensor of the a-side low-temperature Duan Reguan heat exchanger.
an a-side low-temperature Duan Reguan heat exchanger ventilation air inlet temperature sensor is arranged at the ventilation air inlet of the a-side low-temperature Duan Reguan heat exchanger.
The ventilation air outlet of the a-side low-temperature Duan Reguan heat exchanger is provided with a ventilation air outlet temperature sensor of the a-side low-temperature Duan Reguan heat exchanger.
The fresh air inlet of the b-side low-temperature Duan Reguan heat exchanger is provided with a fresh air inlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger.
The fresh air outlet of the b-side low-temperature Duan Reguan heat exchanger is provided with a fresh air outlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger.
The ventilation air inlet of the b-side low-temperature Duan Reguan heat exchanger is provided with a ventilation air inlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger.
The ventilation air outlet of the b-side low-temperature Duan Reguan heat exchanger is provided with a ventilation air outlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger.
The invention also provides a control method of the system for carrying out shaft heat preservation by using the mine ventilation air methane waste heat, in particular to an ice melting method, which comprises the following steps.
And determining the design selection working condition of the low-temperature Duan Reguan heat exchanger according to the actual condition of the ventilation air heat extraction process, and selecting the low-temperature Duan Reguan heat exchanger according to the design selection working condition. Design selection conditions include: fresh air inlet design value-taking temperature
The design value temperature of the fresh air outlet is +.>
Ventilation air intake design value temperature +.>
The design value temperature of the ventilation air outlet>
Calculating the standard theta of the low-temperature Duan Reguan heat exchanger according to the following formula 0 ：
And set the comparison value theta 1 、θ 2 Taking θ 1 ＝0.75～0.8θ 0 ，θ 2 ＝0.9θ 0 。
When the a-side low-temperature Duan Reguan heat exchanger operates, detecting the fresh air inlet temperature T of the a-side low-temperature Duan Reguan heat exchanger 24-1 Fresh air outlet temperature T 24-2 Ventilation air inlet temperature T of a-side low-temperature Duan Reguan heat exchanger 25-1 Exhaust outlet temperature T 25-2 The method comprises the steps of carrying out a first treatment on the surface of the And detecting the running frequency eta of the fresh air blower. Calculating a-side control parameter θ as follows a ：
Similarly, the b-side low-temperature Duan Reguan heat exchanger detects the fresh air inlet temperature T of the b-side low-temperature Duan Reguan heat exchanger 24-1 ' fresh air outlet temperature T 24-2 ' b side low temperature Duan Reguan heat exchanger ventilation air methane inlet temperature T 25-1 ' Ventilation air outlet temperature T 25-2 ' acquiring b-side control parameter θ b ：
Calculating b-side control parameter θ b ：
When theta is as a ≤θ 1 And T is 25-2 Starting a side ice melting measure when the temperature is less than 0 ℃; when theta is as b ≤θ 1 And T is 25-2 And starting the b-side ice melting measure when the temperature is less than 0 ℃.
The ice melting is started on only one side of the side a and the side b.
Detecting a-side control parameter θ a ≤θ 1 And T is 25-2 And (3) opening a b-side fresh air side ice melting switching valve and a fresh air side ice melting switching valve in a standby state when the temperature is lower than 0 ℃, starting the b-side low-temperature heat pipe heat exchanger, and then closing an a-side fresh air side ice melting switching valve and a fresh air side ice melting switching valve.
after the ventilation air methane side ice melting switching valve on the a side is completely closed, detecting the control parameter theta on the b side b If theta b ＞θ 2 Only opening the ventilation air methane side ice melting switching valve on the a side, if theta b ≤θ 2 And (3) starting the electric heating wire of the low-temperature heat pipe heat exchanger at the side a while opening the ventilation air methane side ice melting switching valve at the side a, and carrying out electric heating to accelerate ice melting.
In the ice melting process, when T 25-2 ≥T 25-1 When the ice melting process is finished, the corresponding electric heater is turned off, the ventilation air side ice melting switching valve and the fresh air side ice melting switching valve are turned off, the a side low-temperature heat pipe heat exchanger is in a standby state, and the b side theta is reached b ≤θ 1 And T is 25-2 The' < 0 ℃ is put into use again.
The invention also provides a control method of the system for carrying out shaft heat preservation by using the mine ventilation air methane waste heat, in particular to an extreme weather protection control method, which comprises the following steps.
High temperature section heat pipe heat exchanger ventilation air methane outlet temperature T 23-2 And the temperature is lower than 3 ℃ and is regarded as extreme weather, and the anti-icing protection of the heat pipe exchanger at the high temperature section is finished. When the temperature is less than 0 ℃ T 23-2 Starting a low-temperature Duan Reguan heat exchanger in a standby state when the temperature is lower than 3 ℃; when T is 23-2 When the temperature is less than 0 ℃, starting the low-temperature Duan Reguan heat exchanger to electrically heat and supplement heat; t still after electric heating is started 23-2 When the temperature is lower than 0 ℃ and the fresh air blower is maintained for a long time, the running frequency of the fresh air blower is reduced, the fresh air ventilation quantity is reduced, and simultaneously, the alarm is given (the pit shaft freeze injury protection is prompted) until T is reached 23-2 And (3) after the temperature is more than or equal to 3 ℃, recovering the running frequency of the fresh air blower, and recovering the normal running mode.
The system has the beneficial effects that the system utilizes the waste heat of the ventilation air, realizes that the waste heat of the ventilation air is directly used for heat preservation of a shaft, utilizes a heat pipe heat exchanger, utilizes the waste heat of the ventilation air to heat fresh air (shaft air supply) in a high-temperature and low-temperature sectional mode, utilizes the temperature detection of the fresh air and the ventilation air to judge the icing condition of a low-temperature Duan Reguan heat exchanger, and carries out ice melting in a heat exchange-free ventilation and electric heating mode. The invention adopts the heat pipe heat exchanger to exchange gas-gas, and can obtain better heat exchange effect by adding the rib on the heat pipe core pipe and the heat exchange end difference of 15-20 ℃. The heat pipe has a good unidirectional heat transfer function, so that the problem of low-temperature icing on the ventilation air side is also more convenient to treat.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
FIG. 2 is a schematic diagram of the position structure of a temperature sensor in the structure of the present invention.
FIG. 3 is a schematic diagram of a high temperature heat pipe heat exchanger according to the present invention.
Fig. 4 is a schematic diagram of a low-temperature Duan Reguan heat exchanger on the a side of the invention.
Fig. 5 is a schematic diagram of a b-side low temperature Duan Reguan heat exchanger according to the present invention.
FIG. 6 is a schematic illustration of a heat pipe bundle arrangement.
FIG. 7 is a schematic diagram of a heat pipe structure within the ventilation air methane channel of a high temperature section heat pipe heater.
Fig. 8 is a schematic diagram of a heat pipe structure in a low temperature Duan Reguan heater ventilation air methane channel.
In the figure, 1, a ventilation air induced air duct, 4, a high-temperature section heat pipe heat exchanger, 5, a ventilation air communication duct, 8, a ventilation air induced draft fan, 9, a ventilation air exhaust duct, 10, a fresh air induced air duct, 11, a fresh air filter, 12, a fresh air blower, 14, a fresh air communication duct, 15, a fresh air exhaust duct, 17, a drainage runner, 18, a heat pipe, 19, a core pipe, 20 and an electric heating wire.
Wherein 2-a is an a-side air duct valve, 2-b is a b-side air duct valve, 3-a is an a-side ventilation air filtering system, 3-b is a b-side ventilation air filtering system, 6-1 is an a-side ventilation air side ice-melting switching air valve, 6-2 is a b-side ventilation air side ice-melting switching air valve, 7-1 is an a-side low temperature Duan Reguan heat exchanger, 7-2 is a b-side low temperature Duan Reguan heat exchanger, 13-1 is an a-side fresh air side ice-melting switching air valve, 13-2 is a b-side fresh air side ice melting switching air valve, 16-1 is a heat pipe bundle of a high-temperature section heat pipe heat exchanger, 16-2 is a heat pipe bundle of a low-temperature Duan Reguan heat exchanger, 21-1 is an annular rib, 21-2 is a spiral rib, 22-1 is a fresh air outlet temperature sensor of the high-temperature section heat pipe heat exchanger, and 22-2 is a fresh air inlet temperature sensor of the high-temperature section heat pipe heat exchanger; 23-1 is a high-temperature section heat pipe heat exchanger ventilation air methane inlet temperature sensor, and 23-2 is a high-temperature section heat pipe heat exchanger ventilation air methane outlet temperature sensor; 24-1 is a fresh air inlet temperature sensor of the a-side low-temperature Duan Reguan heat exchanger, and 24-2 is a fresh air outlet temperature sensor of the a-side low-temperature Duan Reguan heat exchanger; 25-1 is a ventilation air methane inlet temperature sensor of the a-side low-temperature Duan Reguan heat exchanger, and 25-2 is a ventilation air methane outlet temperature sensor of the a-side low-temperature Duan Reguan heat exchanger; 24-1 'is a fresh air inlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger, and 24-2' is a fresh air outlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger; 25-1 'is a ventilation air inlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger, and 25-2' is a ventilation air outlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger.
Detailed Description
As shown in fig. 1-8, the system for performing shaft heat preservation by using mine ventilation air waste heat comprises a ventilation air induced duct 1, an a-side air duct valve 2-a, a b-side air duct valve 2-b, an a-side ventilation air filtering system 3-a, a b-side ventilation air filtering system 3-b, a high-temperature section heat pipe heat exchanger 4, a ventilation air communication duct 5, an a-side ventilation air side ice melting switching air valve 6-1, a b-side ventilation air side ice melting switching air valve 6-2, an a-side low temperature Duan Reguan heat exchanger 7-1, a b-side low temperature Duan Reguan heat exchanger 7-2, a ventilation air induced fan 8, a ventilation air exhaust duct 9, a fresh air induced duct 10, a fresh air blower 12, a fresh air filter 11, an a-side fresh air side ice melting switching air valve 13-1, a b-side ice melting switching air valve 13-2, a fresh air communication duct 14 and a fresh air duct 15.
The ventilation air methane channel 1 is respectively connected with an a-side ventilation air methane channel valve 2-a and a b-side ventilation air methane channel valve 2-b, the a-side ventilation air methane channel valve 2-a is connected with an a-side ventilation air methane filtering system 3-a, the b-side ventilation air methane channel valve 2-b is connected with a b-side ventilation air methane filtering system 3-b, the a-side ventilation air methane filtering system 3-a and the b-side ventilation air methane filtering system 3-b are both connected with a ventilation air methane inlet of the high-temperature section heat pipe exchanger 4, a ventilation air methane outlet of the high-temperature section heat pipe exchanger 4 is connected with a ventilation air methane communication air methane channel 5, the ventilation air methane communication air methane channel 5 is respectively connected with an a-side ventilation air methane side ice-melting switching valve 6-1, the b-side ventilation air methane-side ice-melting switching valve 6-2, the a-side ventilation air methane-side ice switching valve 6-1 is connected with a ventilation air methane inlet of the a-side low-temperature Duan Reguan heat exchanger 7-1, the b-side ventilation air methane-low temperature Duan Reguan heat exchanger 7-2 is connected with a ventilation air methane outlet of the b-side low-temperature 5242 heat exchanger 7-2, the ventilation air methane outlet of the a-low-temperature heat exchanger 7-2 is connected with a ventilation air methane outlet of the ventilation air methane channel 9, and the ventilation air methane channel is arranged on the draught fan 9.
The fresh air introducing duct 10 is sequentially provided with a fresh air filter 11 and a fresh air blower 12, the fresh air introducing duct 10 is respectively connected with a fresh air inlet of the a-side low-temperature Duan Reguan heat exchanger 7-1 and a fresh air inlet of the b-side low-temperature Duan Reguan heat exchanger 7-2 through an a-side fresh air side ice melting switching air valve 13-1 and a b-side fresh air side ice melting switching air valve 13-2, a fresh air outlet of the a-side low-temperature Duan Reguan heat exchanger 7-1 and a fresh air outlet of the b-side low-temperature Duan Reguan heat exchanger 7-2 are both connected with a fresh air inlet of the high-temperature section heat pipe heat exchanger 4 through a fresh air communicating duct 14, and a fresh air outlet of the high-temperature section heat pipe heat exchanger 4 is connected with a fresh air exhausting duct 15.
The high-temperature section heat pipe heater 4 comprises a high-temperature section heat pipe heater ventilation air passage and a high-temperature section heat pipe heater fresh air passage, wherein the high-temperature section heat pipe heater ventilation air passage is respectively connected with a ventilation air inlet of the high-temperature section heat pipe heat exchanger and a ventilation air outlet of the high-temperature section heat pipe heat exchanger, and the high-temperature section heat pipe heater fresh air passage is connected with a fresh air inlet of the high-temperature section heat pipe heat exchanger and a fresh air outlet of the high-temperature section heat pipe heat exchanger; the high-temperature section heat pipe heater 4 is internally provided with at least one group of heat pipe bundles 16-1 and a drainage flow passage 17, the heat pipe bundles 16-1 comprise four rows of heat pipes 18 which are arranged in a staggered manner, each heat pipe 18 comprises a core pipe 19 and fins, the heat pipes 18 penetrate through a ventilation air channel of the high-temperature section heat pipe heater and a fresh air channel of the high-temperature section heat pipe heater, and the heat pipes in the ventilation air channel of the high-temperature section heat pipe heater adopt annular fins 21-1.
The a-side low-temperature Duan Reguan heater 7-1 comprises an a-side low-temperature Duan Reguan heater ventilation air passage and an a-side low-temperature Duan Reguan heater fresh air passage, wherein the a-side low-temperature Duan Reguan heater ventilation air passage is respectively connected with a ventilation air inlet of an a-side low-temperature Duan Reguan heat exchanger and a ventilation air outlet of an a-side low-temperature Duan Reguan heat exchanger, and the a-side low-temperature Duan Reguan heater fresh air passage is connected with a fresh air inlet of an a-side low-temperature Duan Reguan heat exchanger and a fresh air outlet of an a-side low-temperature Duan Reguan heat exchanger; the a-side low temperature Duan Reguan heater is internally provided with at least one group of heat pipe bundles 16-2 and a combination of drainage flow channels 17, the heat pipe bundles 16-2 comprise four rows of heat pipes 18 which are arranged in a staggered manner, each heat pipe 18 comprises a core pipe 19 and fins, each heat pipe 18 penetrates through a ventilation air channel of the a-side low temperature Duan Reguan heater and a fresh air channel of the a-side low temperature Duan Reguan heater, each heat pipe in the ventilation air channel of the a-side low temperature Duan Reguan heater adopts a spiral fin 21-2, and electric heating wires 20 are wound at the root of each spiral fin.
The b-side low temperature Duan Reguan heater 7-2 has the same structure as the a-side low temperature Duan Reguan heater 7-1, the b-side low temperature Duan Reguan heater 7-2 comprises a b-side low temperature Duan Reguan heater ventilation air channel and a b-side low temperature Duan Reguan heater fresh air channel, the b-side low temperature Duan Reguan heater ventilation air channel is respectively connected with a ventilation air inlet of the b-side low temperature Duan Reguan heat exchanger and a ventilation air outlet of the b-side low temperature Duan Reguan heat exchanger, and the b-side low temperature Duan Reguan heater fresh air channel is connected with a fresh air inlet of the b-side low temperature Duan Reguan heat exchanger and a fresh air outlet of the b-side low temperature Duan Reguan heat exchanger; the b-side low temperature Duan Reguan heater is internally provided with at least one group of heat pipe bundles 16-2 and a combination of drainage flow channels 17, the heat pipe bundles 16-2 comprise four rows of heat pipes 18 which are arranged in a staggered manner, each heat pipe 18 comprises a core pipe 19 and fins, each heat pipe 18 penetrates through a ventilation air channel of the b-side low temperature Duan Reguan heater and a fresh air channel of the b-side low temperature Duan Reguan heater, each heat pipe in the ventilation air channel of the b-side low temperature Duan Reguan heater adopts a spiral fin 21-2, and electric heating wires 20 are wound at the root of each spiral fin.
The fresh air outlet of the high-temperature section heat pipe heat exchanger is provided with a fresh air outlet temperature sensor 22-1.
The fresh air inlet of the high-temperature section heat pipe heat exchanger is provided with a fresh air inlet temperature sensor 22-2 of the high-temperature section heat pipe heat exchanger.
The ventilation air inlet of the high-temperature section heat pipe heat exchanger is provided with a ventilation air inlet temperature sensor 23-1.
The ventilation air outlet of the high-temperature section heat pipe heat exchanger is provided with a ventilation air outlet temperature sensor 23-2.
The fresh air inlet of the a-side low-temperature Duan Reguan heat exchanger is provided with a fresh air inlet temperature sensor 24-1 of the a-side low-temperature Duan Reguan heat exchanger.
The fresh air outlet of the a-side low-temperature Duan Reguan heat exchanger is provided with a fresh air outlet temperature sensor 24-2 of the a-side low-temperature Duan Reguan heat exchanger.
The ventilation air inlet of the a-side low-temperature Duan Reguan heat exchanger is provided with a ventilation air inlet temperature sensor 25-1 of the a-side low-temperature Duan Reguan heat exchanger.
The ventilation air outlet of the a-side low-temperature Duan Reguan heat exchanger is provided with a ventilation air outlet temperature sensor 25-2 of the a-side low-temperature Duan Reguan heat exchanger.
The fresh air inlet of the b-side low-temperature Duan Reguan heat exchanger is provided with a fresh air inlet temperature sensor 24-1' of the b-side low-temperature Duan Reguan heat exchanger.
The fresh air outlet of the b-side low-temperature Duan Reguan heat exchanger is provided with a fresh air outlet temperature sensor 24-2' of the b-side low-temperature Duan Reguan heat exchanger.
The ventilation air inlet of the b-side low-temperature Duan Reguan heat exchanger is provided with a ventilation air inlet temperature sensor 25-1' of the b-side low-temperature Duan Reguan heat exchanger.
The ventilation air outlet of the b-side low-temperature Duan Reguan heat exchanger is provided with a ventilation air outlet temperature sensor 25-2' of the b-side low-temperature Duan Reguan heat exchanger.
The high-temperature section heat pipe heat exchanger 4 and the low-temperature Duan Reguan heat exchanger are vertically arranged, fresh air flows in the upper section, ventilation air flows in the lower section, wherein the lower end is an a side, and the upper end is a b side.
The following describes the preferred embodiments of the present invention with reference to the drawings.
And starting the ventilation air draft fan 8 and the fresh air blower 12, and circulating ventilation air and fresh air in the system.
Wherein, ventilation air flow: the ventilation air methane induced draft duct 1 passes through a duct air valve and enters a ventilation air methane filtering system to realize cleaning. Then, clean ventilation air enters the lower section of the high-temperature section heat pipe heat exchanger 4, and heat is transferred to fresh air at the upper section of the high-temperature section heat pipe heat exchanger 4 through the heat pipe heat exchanger. After leaving the high-temperature section heat pipe exchanger 4, the ventilation air enters a ventilation air communication air duct 5, enters the lower section of the low-temperature Duan Reguan heat exchanger through a ventilation air ice-melting switching air valve, and transfers heat to fresh air at the upper section through the heat pipe heat exchanger in the low-temperature Duan Reguan heat exchanger. After leaving the low-temperature Duan Reguan heat exchanger, the ventilation air is exhausted from the system by the ventilation air draft fan 8.
Fresh air flow: fresh air enters the upper section of the low-temperature Duan Reguan heat exchanger through the fresh air induced duct 10 and the fresh air filter 11, the fresh air fan 12 and the fresh air side ice melting switching valve. Then, the fresh air receives the heat transmitted by the heat pipe heat exchanger, the temperature of the fresh air rises, and then the fresh air enters the fresh air communication air duct 14 and enters the upper section of the high-temperature section heat pipe heat exchanger 4 again to be heated continuously. After leaving the high-temperature section heat pipe exchanger 4, the fresh air is led to the shaft through a fresh air exhaust duct 15.
Because the ventilation air methane contains dust and water, in order to prevent the heat pipe heat exchanger from being blocked, two ventilation air methane filtering systems are arranged on the ventilation air methane induced duct 1, and the ventilation air methane induced duct is switched through a duct valve.
Icing must be considered when the ventilation air temperature is < 5 ℃. Therefore, the invention divides the ventilation air methane heat extraction into two ends: the high temperature section extracts heat energy of ventilation air methane not less than 5 ℃ and the low temperature section extracts heat energy of ventilation air methane less than 5 ℃. In order to ensure stable heat preservation connection of the shaft, the low-temperature section with icing problem is also configured in a standby mode, so that ice melting operation is convenient.
The control method of the system working process comprises the following steps:
the ventilation air draft fan 8 and the fresh air blower 12 are started to circulate ventilation air and fresh air in the system.
And (3) controlling the temperature of shaft air supply: because the ventilation air temperature is very stable, the fresh air temperature fluctuates along with the change of weather, and under the premise of ensuring the stability of the air supply temperature of the shaft, the fresh air blower 12 adopts a frequency conversion mode to ensure the energy consumption as much as possible, and the shaft air inlet and the shaft room are stabilized at the required temperature by adjusting the flow of the hot fresh air fed into the shaft.
And (3) an ice melting detection process:
the ice melting method of the present invention will be further described by way of an example.
Design selection working condition of low-temperature Duan Reguan heat exchanger: the fresh air inlet design value temperature is-20 ℃, the fresh air outlet design value temperature is-5 ℃, the ventilation air inlet design value temperature is 5 ℃, and the ventilation air outlet design value temperature is-6 ℃.
Calculating the standard theta of the low-temperature Duan Reguan heat exchanger according to the following formula 0 ：
Setting a comparison value theta 1 、θ 2 Taking θ 1 ＝0.8θ 0 ＝0.8×1.2618＝1.0094，θ 2 ＝0.9θ 0 ＝0.9×1.2618＝1.1356。
The ice melting is started on only one side of the a side and the b side; it is assumed that currently, the a-side is running and the b-side is in standby. Detecting the fresh air inlet temperature of the a-side low-temperature Duan Reguan heat exchanger at-13 ℃ and the fresh air outlet temperature of the a-side low-temperature Duan Reguan heat exchanger at-4 ℃, and the ventilation air inlet temperature of the a-side low-temperature Duan Reguan heat exchanger at 4 ℃ and the ventilation air outlet temperature of the a-side low-temperature 5225 heat exchanger at-2.4 ℃; the operating frequency of the fresh air blower was detected at 45Hz. a-side control parameter θ a ：
a-side control parameter θ a ＝0.9347≤θ 1 =1.0094, and T 25-2 The temperature of the solution is less than or equal to 0 ℃ below zero and is less than or equal to 2.4 ℃, so that ice melting is required to be started on the side a. At the moment, a ventilation air methane side ice melting switching valve and a fresh air side ice melting switching valve on the b side are opened, a b side low-temperature Duan Reguan heat exchanger is started, and then the ventilation air methane side ice melting switching valve and the ventilation air methane side ice melting switching valve on the a side are closed. After the b-side low-temperature Duan Reguan heat exchanger is completely started and stably operated, the fresh air inlet temperature of the b-side low-temperature Duan Reguan heat exchanger is detected to be-13 ℃, the fresh air outlet temperature of the b-side low-temperature Duan Reguan heat exchanger is detected to be-3.5 ℃, the ventilation air inlet temperature of the b-side low-temperature Duan Reguan heat exchanger is 4 ℃, the ventilation air outlet temperature of the b-side low-temperature Duan Reguan heat exchanger is detected to be-2.8 ℃, and the operation frequency of the fresh air blower is still 45Hz. Thereby obtaining the b-side control parameter theta b ：
b-side control parameter θ b ＝1.0382≤θ 2 = 1.1356, so a-side melting needs to accelerate melting: and opening an ice melting switching valve on the ventilation air side of the a-side low-temperature heat pipe heat exchanger, and simultaneously starting the a-side electric heating to start ice melting.
The outlet temperature of the Ventilation Air Methane (VAM) on the a side is detected to be 4.1 ℃ in the ice melting process, the inlet temperature of the VAM is detected to be 4 ℃, and the T is satisfied 25-2 ≥T 25-1 The ice melting on the side a is completed. At the moment, the ventilation air methane side ice melting switching valve at the side a and the electric heating are closed, the low-temperature heat pipe heat exchanger at the side a is in a standby state, and the low-temperature heat pipe heat exchanger is put into use when ice melting at the side b is needed.
Extreme weather protection control: high temperature section heat pipe heat exchanger 4 ventilation air methane outlet temperature T 23-2 (corresponding to the ventilation air outlet temperature sensor 23-2 of the high-temperature section heat pipe heat exchanger) is lower than 3 ℃, and the high-temperature section heat pipe heat exchanger 4 is considered as extreme weather and is well protected from ice. When the temperature is less than 0 ℃ T 23-2 When the temperature is less than 3 ℃, the low-temperature Duan Reguan heat exchanger in a standby state is put into use; when T is 23-2 When the temperature is less than 0 ℃, starting the low-temperature Duan Reguan heat exchanger to electrically heat and supplement heat; t still after electric heating is started 23-2 When the temperature is lower than 0 ℃ and the fresh air blower is maintained for a long time, the running frequency of the fresh air blower is properly reduced, the fresh air ventilation quantity is reduced, and simultaneously, the alarm is given (the pit shaft is prompted for freeze injury protection) until T 23-2 And (3) recovering the running frequency of the fresh air blower after the temperature is more than or equal to 3 ℃.
The present invention is not limited to the above embodiments, and any person who makes the technical solution with the same or similar to the present invention in the light of the present invention should be known to fall within the scope of the present invention.
The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.
Claims (8)
1. The system is characterized by comprising a ventilation air induced duct, an a-side air duct valve, a b-side air duct valve, an a-side ventilation air filtering system, a b-side ventilation air filtering system, a high-temperature section heat pipe heat exchanger, a ventilation air communication duct, an a-side ventilation air side deicing switching air valve, a b-side ventilation air side deicing switching air valve, an a-side low-temperature Duan Reguan heat exchanger, a b-side low-temperature Duan Reguan heat exchanger, a ventilation air induced draft fan, a ventilation air exhaust duct, a fresh air induced duct, a fresh air blower, a fresh air filter, an a-side fresh air side deicing switching air valve, a b-side fresh air side deicing switching air valve, a fresh air communication duct and a fresh air exhaust duct;
the ventilation air duct is respectively connected with an a-side ventilation air duct valve and a b-side ventilation air duct valve, the a-side ventilation air duct valve is connected with an a-side ventilation air duct filtering system, the b-side ventilation air duct valve is connected with a b-side ventilation air duct filtering system, the a-side ventilation air duct filtering system and the b-side ventilation air duct filtering system are both connected with a ventilation air inlet of a high-temperature section heat pipe heat exchanger, a ventilation air outlet of the high-temperature section heat pipe heat exchanger is connected with a ventilation air communication duct, the ventilation air communication duct is respectively connected with an a-side ventilation air duct side ice-melting switching air valve and a b-side ventilation air duct side ice-melting switching air valve, the a-side ventilation air duct side ice-melting switching air valve is connected with a ventilation air inlet of an a-side low-temperature Duan Reguan heat exchanger, the b-side ventilation air duct side ice-melting switching air valve is connected with a ventilation air inlet of a b-side low-temperature Duan Reguan heat exchanger, a ventilation air outlet of the a-side low-temperature Duan Reguan heat exchanger and a ventilation air duct of the b-side low-temperature Duan Reguan heat exchanger are both connected with a ventilation air duct, and a ventilation air draught fan is arranged on the ventilation air duct;
the fresh air introducing air duct is sequentially provided with a fresh air filter and a fresh air blower, the fresh air introducing air duct is respectively connected with a fresh air inlet of an a-side low-temperature Duan Reguan heat exchanger and a fresh air inlet of a b-side low-temperature Duan Reguan heat exchanger through an a-side fresh air side ice-melting switching air valve and a b-side fresh air side ice-melting switching air valve, a fresh air outlet of the a-side low-temperature Duan Reguan heat exchanger and a fresh air outlet of the b-side low-temperature Duan Reguan heat exchanger are both connected with a fresh air inlet of a high-temperature section heat pipe heat exchanger through a fresh air communication air duct, and a fresh air outlet of the high-temperature section heat pipe heat exchanger is connected with a fresh air exhaust air duct;
the high-temperature section heat pipe heater comprises a high-temperature section heat pipe heater ventilation air passage and a high-temperature section heat pipe heater fresh air passage, wherein the high-temperature section heat pipe heater ventilation air passage is respectively connected with a ventilation air inlet of the high-temperature section heat pipe heat exchanger and a ventilation air outlet of the high-temperature section heat pipe heat exchanger, and the high-temperature section heat pipe heater fresh air passage is connected with a fresh air inlet of the high-temperature section heat pipe heat exchanger and a fresh air outlet of the high-temperature section heat pipe heat exchanger; the high-temperature section heat pipe heater is internally provided with at least one group of heat pipe bundles and a drainage runner, the heat pipe bundles comprise four rows of heat pipes which are arranged in a staggered manner, each heat pipe comprises a core pipe and fins, and the heat pipes penetrate through a ventilation air channel of the high-temperature section heat pipe heater and a fresh air channel of the high-temperature section heat pipe heater;
the a-side low-temperature Duan Reguan heater comprises an a-side low-temperature Duan Reguan heater ventilation air passage and an a-side low-temperature Duan Reguan heater fresh air passage, wherein the a-side low-temperature Duan Reguan heater ventilation air passage is respectively connected with a ventilation air inlet of the a-side low-temperature Duan Reguan heat exchanger and a ventilation air outlet of the a-side low-temperature Duan Reguan heat exchanger, and the a-side low-temperature Duan Reguan heater fresh air passage is connected with a fresh air inlet of the a-side low-temperature Duan Reguan heat exchanger and a fresh air outlet of the a-side low-temperature Duan Reguan heat exchanger; the a-side low-temperature Duan Reguan heater is internally provided with at least one group of heat pipe bundles and a drainage flow passage, the heat pipe bundles comprise four rows of heat pipes which are arranged in a staggered manner, each heat pipe comprises a core pipe and fins, and each heat pipe penetrates through a ventilation air passage of the a-side low-temperature Duan Reguan heater and a fresh air passage of the a-side low-temperature Duan Reguan heater;
the b-side low-temperature Duan Reguan heater comprises a b-side low-temperature Duan Reguan heater ventilation air passage and a b-side low-temperature Duan Reguan heater fresh air passage, wherein the b-side low-temperature Duan Reguan heater ventilation air passage is respectively connected with a ventilation air inlet of the b-side low-temperature Duan Reguan heat exchanger and a ventilation air outlet of the b-side low-temperature Duan Reguan heat exchanger, and the b-side low-temperature Duan Reguan heater fresh air passage is connected with a fresh air inlet of the b-side low-temperature Duan Reguan heat exchanger and a fresh air outlet of the b-side low-temperature Duan Reguan heat exchanger; the b-side low temperature Duan Reguan heater is internally provided with at least one group of heat pipe bundles and a drainage runner, the heat pipe bundles comprise four rows of heat pipes which are arranged in a staggered manner, each heat pipe comprises a core pipe and fins, and the heat pipes penetrate through a ventilation air channel of the b-side low temperature Duan Reguan heater and a fresh air channel of the b-side low temperature Duan Reguan heater.
2. The system for thermal insulation of a shaft by using waste heat of ventilation air methane in a mine as claimed in claim 1, wherein the heat pipe in the ventilation air methane channel of the heat pipe heater in the high temperature section adopts annular ribs.
3. The system for heat preservation of a shaft by using waste heat of ventilation air methane in a mine as claimed in claim 1, wherein heat pipes of ventilation air methane channels of a side low-temperature Duan Reguan heater and ventilation air methane channels of a side low-temperature Duan Reguan heater adopt spiral ribs, and electric heating wires are wound at roots of the spiral ribs.
4. The system for thermal insulation of a well bore using waste heat of ventilation air methane in a well of claim 1, wherein the combined distance between each group of heat pipe bundles and the drainage flow passage is more than 1000mm, so that the heat pipe bundles can be conveniently manually entered into the cleaning pipe bundles.
5. The system for carrying out shaft heat preservation by using mine ventilation air methane waste heat according to claim 1, wherein a fresh air outlet temperature sensor of the high-temperature section heat pipe heat exchanger is arranged at a fresh air outlet of the high-temperature section heat pipe heat exchanger; a fresh air inlet temperature sensor of the high-temperature section heat pipe heat exchanger is arranged at a fresh air inlet of the high-temperature section heat pipe heat exchanger; a ventilation air inlet temperature sensor of the high-temperature section heat pipe heat exchanger is arranged at the ventilation air inlet of the high-temperature section heat pipe heat exchanger; the ventilation air outlet of the high-temperature section heat pipe heat exchanger is provided with a ventilation air outlet temperature sensor.
6. The system for carrying out shaft heat preservation by using mine ventilation air methane waste heat according to claim 1, wherein a side low temperature Duan Reguan heat exchanger fresh air inlet temperature sensor is arranged at a side low temperature Duan Reguan heat exchanger fresh air inlet; the fresh air outlet of the a-side low-temperature Duan Reguan heat exchanger is provided with a fresh air outlet temperature sensor of the a-side low-temperature Duan Reguan heat exchanger; an a-side low-temperature Duan Reguan heat exchanger ventilation air inlet temperature sensor is arranged at the ventilation air inlet of the a-side low-temperature Duan Reguan heat exchanger; an a-side low-temperature Duan Reguan heat exchanger ventilation air outlet temperature sensor is arranged at the ventilation air outlet of the a-side low-temperature Duan Reguan heat exchanger; a fresh air inlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger is arranged at the fresh air inlet of the b-side low-temperature Duan Reguan heat exchanger; the fresh air outlet of the b-side low-temperature Duan Reguan heat exchanger is provided with a fresh air outlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger; the ventilation air inlet of the b-side low-temperature Duan Reguan heat exchanger is provided with a ventilation air inlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger; the ventilation air outlet of the b-side low-temperature Duan Reguan heat exchanger is provided with a ventilation air outlet temperature sensor of the b-side low-temperature Duan Reguan heat exchanger.
7. The control method of the system for carrying out heat preservation on a shaft by using waste heat of ventilation air methane in a mine as claimed in claim 1, which is characterized by comprising the following steps:
1) According to the design selection working condition of the low-temperature Duan Reguan heat exchanger: fresh air inlet design value-taking temperature
The design value temperature of the fresh air outlet is +.>
Ventilation air intake design value temperature +.>
The design value temperature of the ventilation air outlet>
Calculating the standard theta of a low-temperature Duan Reguan heat exchanger 0 ：
2) Setting a comparison value theta 1 、θ 2 Taking θ 1 ＝0.75～0.8θ 0 ，θ 2 ＝0.9θ 0 ；
3) When the a-side low-temperature Duan Reguan heat exchanger operates, detecting the fresh air inlet temperature T of the a-side low-temperature Duan Reguan heat exchanger 24-1 Fresh air outlet temperature T 24-2 Ventilation air inlet temperature T of a-side low-temperature Duan Reguan heat exchanger 25-1 Exhaust outlet temperature T 25-2 The running frequency eta of the fresh air blower calculates a side control parameter theta according to the following formula a ：
4) When the b-side low-temperature Duan Reguan heat exchanger operates, the fresh air inlet temperature T of the b-side low-temperature Duan Reguan heat exchanger is detected 24-1 ' fresh air outlet temperature T 24-2 ' b side low temperature Duan Reguan heat exchanger ventilation air methane inlet temperature T 25-1 ' Ventilation air outlet temperature T 25-2 ' the operation frequency eta of the fresh air blower calculates the b-side control parameter theta b ：
5) When theta is as a ≤θ 1 And T is 25-2 When the temperature is less than 0 ℃, starting a side ice melting measure; when theta is as b ≤θ 1 And T is 25-2 Starting a b-side ice melting measure when the temperature is less than 0 ℃;
6) Detecting a-side control parameter θ a ≤θ 1 And T is 25-2 B-side fresh air side ice melting switching valve and fresh air side ice melting switching valve which are in standby state are opened when the temperature is lower than 0 ℃, b-side low-temperature heat pipe heat exchanger is started, and then a-side fresh air side ice melting switching valve and fresh air side ice melting switching valve are closed;
7) after the ventilation air methane side ice melting switching valve on the a side is completely closed, detecting the control parameter theta on the b side b If theta b ＞θ 2 Only opening the ventilation air methane side ice melting switching valve on the a side, if theta b ≤θ 2 Starting an electric heating wire of the low-temperature heat pipe heat exchanger at the side a while opening the ventilation air methane side ice melting switching valve at the side a, and carrying out electric heating to accelerate ice melting;
8) In the ice melting process, when T 25-2 ≥T 25-1 When the ice melting process is finished, the corresponding electric heater is turned off, the ventilation air side ice melting switching valve and the fresh air side ice melting switching valve are turned off, the a side low-temperature heat pipe heat exchanger is in a standby state, and the b side theta is reached b ≤θ 1 And T is 25-2 The' < 0 ℃ is put into use again.
8. The control method of the system for carrying out heat preservation on a shaft by using waste heat of ventilation air methane in a mine as claimed in claim 1, which is characterized by comprising the following steps: high temperature section heat pipe heat exchanger ventilation air methane outlet temperature T 23-2 The temperature is lower than 3 ℃ and is regarded as extreme weather, and the anti-icing protection of the heat pipe exchanger at the high temperature section is finished; when the temperature is less than 0 ℃ T 23-2 When the temperature is less than 3 ℃, the low-temperature Duan Reguan heat exchanger in a standby state is put into use; when T is 23-2 When the temperature is less than 0 ℃, starting the low-temperature Duan Reguan heat exchanger to electrically heat and supplement heat; t still after electric heating is started 23-2 When the temperature is lower than 0 ℃ and the fresh air blower is maintained for a long time, the running frequency of the fresh air blower is reduced, the fresh air ventilation quantity is reduced, and the alarm prompts the pit shaft to prevent freezing injury until T 23-2 And (3) recovering the running frequency of the fresh air blower after the temperature is more than or equal to 3 ℃.
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| CN107837629A (en) * | 2017-12-12 | 2018-03-27 | 山东宜美科节能服务有限责任公司 | Low idle air temperature mine air-lack waste heat extraction system |
| CN107965947A (en) * | 2017-12-25 | 2018-04-27 | 北京中矿博能节能科技有限公司 | Direct-cooling type depth enthalpy takes hot idle air heat producing box |
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| CN101775967B (en) * | 2009-12-09 | 2013-02-20 | 山东同方能源工程技术有限公司 | Energy-saving anti-freezing system for coal mine well port |
| CN202281419U (en) * | 2011-10-15 | 2012-06-20 | 太原炬能再生能源供热有限公司 | Mine ventilation air and waste heat utilization device |
| CN203347746U (en) * | 2013-07-05 | 2013-12-18 | 煤炭工业济南设计研究院有限公司 | Mineshaft anti-freezing device by return air heat energy |
| CN203629127U (en) * | 2013-11-26 | 2014-06-04 | 北京中矿博能节能科技有限公司 | Coal mine air feeding well mouth temperature adjusting system |
| RU152978U1 (en) * | 2014-12-31 | 2015-06-27 | Сергей Николаевич Вершинин | DEVICE FOR HEATING MINE VENTILATION AIR |
| CN205980886U (en) * | 2016-07-25 | 2017-02-22 | 山东科技大学 | Mine return air waste heat recovery utilizes system |
| CN106761921B (en) * | 2016-11-28 | 2018-09-28 | 山西文龙中美环能科技股份有限公司 | A kind of equipment system based on weary wind source heat pump |
| CN206269311U (en) * | 2016-12-15 | 2017-06-20 | 北京市中科天一环境技术有限公司 | A kind of antifrost mine ventilation heat-exchanger rig |
| CN107036324A (en) * | 2017-05-08 | 2017-08-11 | 山西文龙中美环能科技股份有限公司 | A kind of weary wind source heat pump equipment system based on heat pipe heat exchanging |
| CN207073406U (en) * | 2017-08-29 | 2018-03-06 | 山东诺德能源科技有限公司 | A kind of system that pit shaft insulation is carried out using mine air-lack waste heat |
-
2017
- 2017-08-29 CN CN201710753134.4A patent/CN107339081B/en active Active
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| CN107339081A (en) | 2017-11-10 |
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Denomination of invention: A system and control method for utilizing the waste heat of mine exhaust air for shaft insulation Granted publication date: 20230509 Pledgee: Ji'nan rural commercial bank Limited by Share Ltd. high tech branch Pledgor: SHANDONG NUODE ENERGY TECHNOLOGY CO.,LTD. Registration number: Y2024980016417 |
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