CN210663030U - Green heating system based on coal mine waste heat utilization - Google Patents
Green heating system based on coal mine waste heat utilization Download PDFInfo
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- CN210663030U CN210663030U CN201921534350.0U CN201921534350U CN210663030U CN 210663030 U CN210663030 U CN 210663030U CN 201921534350 U CN201921534350 U CN 201921534350U CN 210663030 U CN210663030 U CN 210663030U
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Abstract
The utility model relates to a green heating system based on colliery waste heat utilization, including colliery waste heat source unit, heat source transmission and distribution unit, terminal heat supply unit in colliery and PLC the control unit. The utility model discloses according to the current waste heat resource condition in colliery, adopt high-efficient heat transfer or high-efficient heat pump technique, the various waste heat resources in full development utilization colliery form various waste heat sources, a large amount of primary energy has been saved, according to the waste heat source taste characteristics of difference, adopt the cluster and the coupling mode, form the hot water heat source of the unified great difference in temperature, can the low taste waste heat in high-efficient utilization colliery, can save the heat source again and carry the energy consumption, in order to replace colliery traditional coal fired boiler heating system, can provide brand-new energy-conserving solution for colliery heating system.
Description
Technical Field
The utility model relates to a colliery heat supply field especially relates to a green heating system based on colliery waste heat utilization.
Background
At present, most of coal-fired boilers in heating systems of the traditional coal-fired boiler are adopted, and the traditional coal-fired boiler heating systems have the following problems: 1. the air pollution is serious; 2. the coal-fired boiler has low thermal efficiency and large waste of primary energy; 3. the labor environment of workers is poor, and the labor intensity is high; 4. the coal-fired boiler has high maintenance cost and poor safety performance.
In the process of coal mine production and living in China, a large amount of waste heat resources with various heat grades exist, such as: coal mine ventilation air methane and coal mine water burst both have stable and reliable low-grade waste heat resources, and are ideal heat sources for heat pumps; the coal mine air compressor and the coal mine gas generator set both have stable and reliable high-grade waste heat resources, and can be directly utilized by adopting a heat transfer technology; the exhaust steam of the coal mine pit opening power plant has a large amount of condensation waste heat resources, and can be directly utilized by a high back pressure technology or a water source heat pump technology.
At present, most coal mines in China adopt a traditional coal-fired boiler heat supply mode on one hand, consume a large amount of precious primary energy, cause serious pollution to atmosphere in China, and ignore free waste heat resources at the other hand completely, so that the waste of the resources is avoided and a large amount of resources are wasted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at adopting high-efficient heat transfer or high-efficient heat pump technique according to the current waste heat resource condition in colliery, the various waste heat resources in full development utilization colliery form various waste heat sources, through various waste heat source cluster and coupling mode, combine modern control technology, form a green heating system based on colliery waste heat utilization to replace colliery traditional coal fired boiler heating system, provide brand-new energy-conserving solution for colliery heating system.
In order to achieve the above object, the utility model provides a green heating system based on coal mine waste heat utilization, including coal mine waste heat source unit, heat source transmission and distribution unit, coal mine terminal heat supply unit and PLC the control unit, coal mine waste heat source unit includes through the coal mine ventilation air methane waste heat pump heat source of series-parallel coupling connection, coal mine gushing water waste heat pump heat source, coal mine pressure fan waste heat recovery heat source, coal mine gas electricity generation waste heat recovery heat source, coal mine coal slime stoving waste heat recovery heat source, coal mine pithead power plant ventilation steam waste heat recovery heat source, ventilation steam high back pressure waste heat recovery heat source and/or air source heat pump heat source, heat source transmission and distribution unit includes the heating season hot water circulating pump and the non-heating season hot water circulating pump with coal mine waste heat source unit parallel connection, the hot water replenishing pump and the water replenishing water tank that are used for the moisturizing, the shunt water knockout drum that is connected with coal mine terminal heat supply unit and the shunt water collector of, the terminal heat supply unit in colliery includes that colliery bathing hot water preparation is terminal, colliery air inlet well head heat supply terminal, colliery landing stage heat supply terminal, colliery tall and big factory building heat supply terminal and/or coal mine building heating terminal that prevents frostbite, PLC the control unit include central PLC switch board and through communication network respectively with the colliery waste heat source end PLC control substation that central PLC switch board links to each other, colliery terminal heat supply end PLC control substation, heat source transmission and distribution end PLC control substation.
Preferably, the coal mine ventilation air methane waste heat pump heat source comprises a coal mine air return fan, a diffusion chamber and a ventilation air heat pump mechanism which are sequentially communicated, and the ventilation air heat pump mechanism comprises a ventilation air heat pump heat-taking heat exchanger arranged in the diffusion chamber, a compressor, a heat pump condenser and an expansion valve which are sequentially connected with the ventilation air heat pump heat-taking heat exchanger in series; the coal mine water burst waste heat pump heat source comprises a drainage pump arranged under a coal mine, a water storage tank arranged on the ground, a water source side circulating pump connected with the water storage tank and a first water source heat pump unit.
Preferably, the coal mine pressure fan waste heat recovery heat source comprises an oil-water heat exchanger and an air-water heat exchanger which are arranged in parallel with an air cooler of the pressure fan; the coal mine gas power generation waste heat recovery heat source comprises a water-water heat exchanger, a cylinder liner water internal circulating pump and a flue gas-water heat exchanger, wherein the water-water heat exchanger is connected with an air cooler on a gas generator set in parallel; the coal mine slime drying waste heat recovery heat source comprises a slurry circulating pump connected with a drying tail gas wet-type desulfurization and denitrification mechanism and a second water source heat pump unit connected with the slurry circulating pump.
Preferably, the coal mine pithead power plant exhaust steam waste heat recovery heat source comprises a third water source heat pump unit which is arranged on a condenser cooling water loop of the power plant in parallel; the exhaust steam high-backpressure waste heat recovery heat source comprises a valve switching mechanism which is arranged on a condenser cooling water loop of the power plant in parallel.
Preferably, the coal mine bathing hot water preparation tail end comprises a first intermediate plate heat exchanger connected with the shunt water separator, a secondary circulating heating water pump and an intermediate heat storage water tank connected with the intermediate plate heat exchanger, and a bathing hot water feed pump connected with the intermediate heat storage water tank; the coal mine air inlet well mouth anti-freezing heat supply end comprises a low-temperature well mouth anti-freezing heating unit connected with the shunt water separator.
Preferably, the coal mine trestle anti-freezing heat supply end comprises a second intermediate plate heat exchanger connected with the shunt water separator, a secondary anti-freezing liquid circulating pump, a low-temperature hot water radiation heater arranged on the trestle, a liquid supplementing pump and a liquid supplementing water tank.
Preferably, the anti-freezing heat supply tail end of the coal mine high and large factory building is connected with the circulating heating unit and the heat source pipe system of the shunt water separator.
Based on the technical scheme, the utility model has the advantages that:
1. the energy consumption of the green heating system of the utility model basically adopts electric energy, and no combustion and pollution exist;
2. the green heating system of the utility model is based on the comprehensive and full development and utilization of coal mine waste heat resources, thereby saving a large amount of primary energy;
3. the utility model adopts the high-efficiency heat pump technology for the low-grade waste heat of the coal mine, so that the comprehensive energy efficiency ratio of the green heat supply system is high;
4. the utility model adopts the direct heat transfer technology to utilize the high grade waste heat of the coal mine, thereby greatly reducing the operating cost of the green heating system;
5. according to the characteristic of large difference between heating seasons and non-heating seasons of coal mine heat supply load, the utility model adopts a mode of respectively setting the large pump and the small pump in the heat source conveying link, thereby saving energy consumption for conveying the heat source;
6. the utility model adopts a series-parallel coupling mode according to the taste characteristics of different waste heat sources, can form a uniform hot water heat source with larger temperature difference, can efficiently utilize the low-grade waste heat of the coal mine, and can save the energy consumption for conveying the heat source;
7. the utility model discloses an adopt PLC control management technique, both can realize the real-time supply and demand balanced operation of green heating system according to waste heat taste high-low order preference waste heat, guarantee good heating effect, reducible operation managers again saves heat supply energy consumption and working costs.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
FIG. 1 is a schematic diagram of a green heating system based on coal mine waste heat utilization;
FIG. 2 is a partial detail view I of a coal mine waste heat source unit;
FIG. 3 is a detail view II of a part of a coal mine waste heat source unit;
FIG. 4 is a detail view I of a coal mine end heating unit;
fig. 5 is a detail view II of a coal mine end heating unit.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
The utility model provides a green heating system based on colliery waste heat utilization to replace colliery traditional coal fired boiler heating system, provide brand-new energy-conserving solution for colliery heating system. As shown in fig. 1 to 5, a preferred embodiment of the present invention is shown therein.
As shown in fig. 1, the green heating system comprises a coal mine waste heat source unit, a heat source transmission and distribution unit, a coal mine terminal heating unit and a PLC control unit, the coal mine waste heat source unit comprises a coal mine ventilation air methane waste heat pump heat source 1, a coal mine water burst waste heat pump heat source 2, a coal mine pressure fan waste heat recovery heat source 3, a coal mine gas power generation waste heat recovery heat source 4, a coal mine coal slime drying waste heat recovery heat source 5, a coal mine pit opening power plant ventilation air methane waste heat recovery heat source 6, a ventilation air methane high back pressure waste heat recovery heat source 7 and/or an air source heat pump heat source 8 which are connected in series-parallel, the heat source transmission and distribution unit comprises a heating quaternary hot water circulating pump 9 and a non-heating quaternary hot water circulating pump 10 which are connected in parallel with the coal mine waste heat source unit, a hot water replenishing pump 11 and a water replenishing water tank 12 which are used for replenishing water, a shunt water distributor 13 which The coal mine terminal heat supply unit comprises a coal mine bathing hot water preparation terminal 15, a coal mine air inlet wellhead anti-freezing heat supply terminal 16, a coal mine trestle anti-freezing heat supply terminal 17, a coal mine high factory building anti-freezing heat supply terminal 18 and/or a coal mine building heating terminal 19, and the PLC control unit comprises a central PLC control cabinet 20 and a coal mine waste heat source end PLC control substation 21, a coal mine terminal heat supply end PLC control substation 22 and a heat source transmission and distribution end PLC control substation 23 which are connected with the central PLC control cabinet 20 through a communication network.
The utility model discloses can divide into colliery waste heat source unit, heat source transmission and distribution unit, the terminal heat supply unit in colliery and PLC the control unit according to its function, its concrete working process as follows.
The ventilation of the coal mine is a coal mine safety life line, a main return air fan of the ventilation system needs to stably operate for 365 days every year, the main return air fan needs to stably operate for 24 hours every day, the air exhaust volume is large, the ventilation air temperature of a return air outlet of the coal mine in the coldest month in winter is generally not less than 10 ℃, the relative humidity of the ventilation air fan is not less than 60%, the ventilation air temperature of some coal mines is even up to 35 ℃, the relative humidity of some coal mines is up to 90%, the ventilation air temperature is an ideal waste heat resource for a coal mine by adopting an efficient heat pump heat taking and heat supplying technology, the heat source is stable and reliable, the comprehensive energy efficiency COP of the ventilation air heat pump heat source.
As shown in fig. 2, the coal mine ventilation air methane waste heat pump heat source 1 comprises a coal mine air return fan 1-1, a diffusion chamber 1-3 and a ventilation air heat pump mechanism which are sequentially communicated, and the ventilation air heat pump mechanism comprises a ventilation air methane heat pump heat-taking heat exchanger 1-4 arranged in the diffusion chamber 1-3, a compressor, a heat pump condenser 1-2 and an expansion valve which are sequentially connected with the ventilation air methane heat pump heat-taking heat exchanger 1-4 in series.
Specifically, the working principle of the coal mine ventilation air methane waste heat pump heat source 1 is as follows: the method comprises the steps that underground air is sent to a diffusion chamber 1-3 by a coal mine air returning machine 1-1, the underground air is sent into a ventilation air heat pump heat taking heat exchanger 1-4 after pressure equalizing and flow equalizing, heat pump low-temperature low-pressure (less than or equal to 5 ℃) thermal working medium liquid is evaporated and heat taken in the ventilation air heat pump heat taking heat exchanger 1-4, ventilation air is discharged out of a room after heat losing and temperature reducing, heat pump thermal working medium is changed into low-temperature low-pressure gas, the low-temperature low-pressure gas is sucked into a compressor through a working medium pipeline to be compressed to be changed into high-temperature high-pressure (greater than or equal to 80 ℃) working gas, the working gas is sent into a heat pump condenser 1-2, the working gas is condensed and heat transferred with entering heat source low-temperature water (greater than or equal to 45 ℃) in the heat pump condenser 1-2, the low-temperature hot water is heated to be heat source hot, and the heat is taken from the ventilation air by the heat-taking heat exchanger 1-4 of the ventilation air heat pump in the next time, and the circulation is repeated. Because the temperature and the humidity of the ventilation air are very stable, and the operation working condition of the heat pump is single, the ventilation air heat pump has very reliable and high-efficiency operation temperature and is one of ideal heat sources of a coal mine heating system.
The coal mine water burst waste heat adopts a water source heat pump heat source technology, as shown in figure 2, the coal mine water burst waste heat pump heat source 2 comprises a drainage pump 2-1 arranged under a coal mine, a water storage tank 2-3 arranged on the ground, a water source side circulating pump 2-4 connected with the water storage tank 2-3 and a first water source heat pump unit 2-2. The underground drainage pump 2-1 of the coal mine sends the gushing water into a ground reservoir 2-3, the gushing water is sent into an evaporator of a first water source heat pump unit 2-2 through a water source side circulating pump 2-4, the gushing water is evaporated by a heat pump working medium to obtain heat and is sent back into the reservoir 2-3 after being cooled, and the working principle of the heat circulation of the water source heat pump is the same as that of the ventilation heat pump system.
Due to the requirement of coal mine operation, the forced draught fan is one of basic operation devices of coal mines in China. Due to the characteristics of coal mine production operation, such as large underground gas consumption change and unchangeable pressure requirement, the coal mine pressure fan needs to continuously operate to maintain the air pressure, the gas consumption side is very uneven, and a large amount of input power of the pressure fan is converted into heat energy to be dissipated into pressure fan cooling oil (the temperature of the cooling oil is not less than 80 ℃, and an air cooler or water cooling steam carried by the pressure fan is abandoned in the atmospheric environment.
Preferably, the coal mine pressure fan waste heat recovery heat source 3 comprises an oil-water heat exchanger and an air-water heat exchanger which are connected in parallel with an air cooler of the pressure fan 3-1. An oil-water and air-water heat exchanger is arranged in parallel with an air cooler of the pressure fan 3-1 and called as a waste heat recovery device 3-2, and a hot water heat source at about 65 ℃ can be directly prepared by adopting a heat transfer principle and technology.
The waste heat of the coal mine gas generator set is tasted, the temperature of the smoke is up to more than 450 ℃, the proportion of the smoke to the total gas heat value is maximum, and the smoke can be recovered by adopting a direct heat transfer technology. As shown in figure 2, the coal mine gas power generation waste heat recovery heat source 4 comprises a water-water heat exchanger 4-2 connected with an air cooler on a gas generator set 4-1 in parallel, a cylinder liner water internal circulation pump 4-4 connected with the water-water heat exchanger 4-2 and a flue gas-water heat exchanger 4-3 arranged in a flue.
The water-water heat exchanger 4-2 is arranged in parallel with an air cooler of the gas generator set 4-1, and the cylinder liner water waste heat can be completely recovered by switching a cylinder liner water internal circulating pump 4-4 and a valve and adopting a heat transfer principle and technology; a flue gas-water heat exchanger 4-3 is arranged in a unit exhaust flue, and a heat source at about 65 ℃ can be directly prepared by adopting a heat transfer principle and a heat transfer technology in a mode of series-parallel connection with cylinder sleeve water or heat source water.
Furthermore, the coal slime drying waste heat utilization has the characteristics of large waste heat quantity, relative continuity and stability and the like, and can recycle the waste heat. As shown in fig. 3, the coal mine coal slurry drying waste heat recovery heat source 5 comprises a slurry circulating pump 5-4 connected with a drying tail gas wet desulfurization and denitrification mechanism 5-3 and a second water source heat pump unit 5-2 connected with the slurry circulating pump 5-4.
On the basis of the prior art, the utility model combines the drying tail gas wet-type desulfurization and denitration mechanism 5-3 through modes such as alkaline slurry spraying or surging, realizes the heat and moisture exchange between the drying tail gas and the slurry, transfers a large amount of drying waste heat to the slurry, and the heated slurry is sent to the evaporator of the second water source heat pump unit 5-2 through the slurry circulating pump 5-4 to be cooled and sent back to the wet-type desulfurization and denitration mechanism 5-3 again to form a circulating system; and after the thermal medium in the evaporator of the second water source heat pump unit 5-2 is heated, the thermal medium is operated by the water source heat pump thermal system, and a coal mine coal slime drying waste heat recovery heat source 5 is formed at the condensation side of the second water source heat pump unit.
As shown in FIG. 3, the coal mine wellhead power plant exhaust steam waste heat recovery heat source 6 comprises a third water source heat pump unit 6-2 which is arranged on a cooling water loop of a condenser 6-3 of the power plant in parallel. The coal mine pit mouth power plant has large waste steam waste heat and good continuity, and has the best development and utilization value. Specifically, the utility model discloses a third water source heat pump 6-2 heating technology, through the switching and the circulating pump of cooling water, can replace power plant's cooling tower 6-5 winter, realize the condenser 6-3 exhaust steam condensation heat dissipation of power plant on the one hand, the another side forms heat supply hot water heat source through water source heat pump thermodynamic system circulation work.
Furthermore, the exhaust steam high-back pressure waste heat recovery heat source 7 adopts the exhaust steam high-back pressure technology of the condenser 6-3 of the power plant to improve the condensation temperature of the exhaust steam of the condenser 6-3, and directly forms an available hot water heat source after the exhaust steam cooling water is heated to a higher temperature through the switching of a valve switching mechanism 7-1 which is connected in parallel with a cooling water loop of the condenser 6-3 of the power plant.
Because the coal mine waste heat resources have large difference, sometimes the situation that the whole heat supply requirement of the coal mine cannot be met exists because the green heat supply heat source can be formed by completely depending on the waste heat resources of the coal mine. In the method, new auxiliary green energy sources such as solar energy and air energy are added by combining the local conditions of the coal mine, or electric auxiliary heat supply is adopted, or gas-oil boiler auxiliary heat supply is adopted, and in the auxiliary heat supply modes, an air source heat pump heat supply technology is preferably adopted from the two dimensionalities of energy conservation and economy. The air source heat pump heat source 8 can form a unified or dispersed heat supply heat source through a series connection or parallel connection or series-parallel connection mode, and a hot water heat source with the temperature of 50-65 ℃ can be provided for a coal mine heat supply system.
As shown in fig. 1, the heat source transmission and distribution unit includes a heating quaternary hot water circulation pump 9 and a non-heating quaternary hot water circulation pump 10 connected in parallel with the coal mine waste heat source unit, a hot water replenishing pump 11 and a water replenishing tank 12 for replenishing water, a branch water separator 13 connected with the coal mine end heat supply unit, and a branch water collector 14 connected with the coal mine end heat supply unit and the coal mine waste heat source unit respectively.
Specifically, heat source transmission and distribution system is the hot water circulation mobile power and the distribution system who carry and distribute each hot user with the heat source, and it is big to consider the heat supply load in colliery heating season, and heat supply load is little in non-heating season, the utility model discloses set up hot water circulating pump 9 and non-heating season respectively for winter according to this characteristics and used hot water circulating pump 10, its theory of operation as follows:
the low-temperature hot water after each branch heat user uses heat forms a main road through a branch water collector 14, is sucked into a water pump by a hot water circulating pump 9 used in winter and a hot water circulating pump 10 used in non-heating seasons, is mechanically powered by the water pump to work, is pumped to each heat source system to be heated and heated to form high-temperature heat source hot water, and is distributed to each heat user through a branch water separator 13 to be used, so that the circulating balanced operation of heat source supply and heat supply requirements is realized. In order to ensure that the circulating hot water system is not emptied and the operation condition of the water pump is stable, the water replenishing pump 11 and the water replenishing water tank 12 are arranged at the suction inlet of the water pump, and the functions of pressure maintaining and pressure stabilizing of the circulating hot water system are achieved.
The coal mine end heating system is different from the coal mine end heating system in the operating time according to the heating function requirement, and can be generally divided into the following typical end heating systems, and the components and the working process of the typical end heating systems are as follows:
the coal mine bathing hot water heat supply is not only production heat supply but also living heat supply, and is basically a continuous heat supply mode of 365 days and 8760 hours all the year round, and a tail end heat supply system is generally designed into an independent branch tail end heat supply system or an integral independent heat supply system no matter what heat source form is adopted. The utility model discloses based on high energy efficiency and reasonable price/performance ratio as the prerequisite, heat source hot water temperature generally designs between 50 ℃ -65 ℃, belongs to the well low temperature heat source. Aiming at the use requirements of coal mine bathing hot water and the heat source temperature characteristics of a green heating system.
As shown in fig. 4, the coal mine bathing hot water preparation terminal 15 includes a first intermediate plate heat exchanger 15-1 connected to the branch water separator 13, a secondary circulation heating water pump 15-2 and an intermediate heat storage water tank 15-3 connected to the intermediate plate heat exchanger 15-1, and a bathing hot water feed pump 15-4 connected to the intermediate heat storage water tank 15-3. Specifically, the coal mine bathing hot water terminal heat supply system comprises a first middle plate type heat exchanger 15-1, a secondary circulating heating water pump 15-2, a middle heat storage water tank 15-3, a bathing hot water feed pump 15-4 and a heat source pipe system.
When the hot water supply device works, high-temperature heat source hot water transfers heat energy to hot water at the low-temperature side of the heat storage water tank sucked by the secondary circulating heating pump 15-2 through the first middle plate type heat exchanger 15-1, the hot water is heated and then sent to the high-temperature side of the heat storage water tank 15-3 for bathing, the bathing hot water feed pump 15-4 sucks hot water from the high-temperature side of the heat storage water tank 15-3 and sends the hot water to a bathing spray header and a bathing pool for use, and tap water replenishing and circulating backwater of a spraying system are connected to the low-temperature side of the heat storage water tank.
The utility model discloses a colliery bathing hot water preparation is terminal 15 has solved following problem:
A) the capacity of the first intermediate heat storage water tank 15-3, the hot water flow and the temperature difference of the secondary circulating heating pump 15-2 and the circulating heating time are reasonably matched, so that the requirement of preparing bath hot water from a medium-low temperature heat source can be met, and the heat supply load of preparing the low bath hot water can be greatly increased;
B) the design of the first intermediate plate heat exchanger 15-1 is adopted, so that high-temperature heat source hot water and bath hot water are isolated, the scaling problem of the bath hot water is concentrated on the detachable and washable plate heat exchanger, and the operation of heat supply heat source equipment and a system is not influenced;
C) the design of the first intermediate heat storage water tank 15-3 with larger capacity is adopted, the problem of longer heating time of a medium-low temperature heat source is solved, and the problem of more centralized use of bath hot water in a coal mine is also solved;
D) the first intermediate heat storage water tank 15-3 can be designed in a high-temperature area and a low-temperature area, so that the problem of stability of bath hot water supply is solved, and the problem of tap water supplement is also solved;
E) the secondary circulation heating pump 15-2 can adopt a small temperature difference and large flow design, can well maintain a stable temperature field of the heat storage water tank, and ensures the supply quality of bathing hot water.
The anti-freezing heating tail end heating system for the air inlet well mouth of most coal mines in China adopts steam of a coal-fired steam boiler, heats part of cold air entering an air inlet well field through an air heating unit, is mixed with other parts of cold air and then is sucked into the anti-freezing heating tail end heating mode of the well field by the coal mine main fan negative pressure, or directly adopts the anti-freezing heating tail end heating mode that part of hot air of a coal-fired hot air boiler is mixed with the cold air and then is sucked into the well field by the coal mine main fan negative pressure. The traditional anti-freezing heating mode of the coal mine air inlet well head has the problems of large pollution, large energy consumption, high cost, high working strength of workers, poor working environment and the like.
The utility model provides a green heating system based on colliery waste heat utilization, its heat source is 50 ~ 65 ℃ of well low temperature hot water. As shown in fig. 4, the coal mine air inlet well head anti-freezing heat supply end 16 comprises a low-temperature well head anti-freezing heating unit 16-2 connected with the shunt water separator 13. Specifically, the utility model discloses a colliery air inlet well head is prevented frostbite and is heated terminal 16 mainly comprises low temperature well head prevents frostbite heating unit 16-2 and heat source piping, and its theory of operation is: the outdoor cold air is heated by hot water of a heat source through an air-water heat exchanger of a low-temperature wellhead anti-freezing heating unit 16-2 arranged in the unit, and then is sent into a wellhead room 16-1 by a unit blower to be mixed with cold air and then enters a well field, so that the aim of preventing the well field from freezing is fulfilled. In order to meet the coal safety requirement that the temperature of mixed air is not less than 2 ℃, the method is mainly realized by increasing the ratio of heat to cold air.
The coal-fired steam boiler's steam heat source and self-control light pipe radiator mode are mainly adopted to mine landing stage heat preservation heating end system, because landing stage simple structure, it is relatively poor to maintain structure thermal insulation performance, and the air leakage is serious, therefore, coal mine landing stage heat preservation heating load is great, and in addition, the coal stone dust is great in the landing stage, and self-control light pipe radiator surface deposition is serious, leads to the heating effect very poor, often appears freezing the pipe phenomenon.
The utility model discloses in colliery landing stage heat supply end 17) include with plate heat exchanger 17-3, secondary antifreeze circulating pump 17-4, low temperature hot water radiant heater 17-2, fluid infusion pump 17-5 and fluid infusion water tank 17-6 on landing stage 17-1 in the middle of the second that branch water knockout drum 13 links to each other.
As shown in FIG. 4, the heat preservation end 17 of the coal mine trestle mainly comprises a second intermediate plate heat exchanger 17-1, a low-temperature hot water radiation heater 17-2, a secondary anti-freezing solution circulating pump 17-4, a liquid supplementing pump 17-5, a liquid supplementing water tank 17-6 and a heat source pipe system. The working principle is as follows: the heat energy of the hot water of the medium-low temperature heat source is transferred to the antifreeze through the second intermediate plate heat exchanger 17-3, the antifreeze is sent into the low-temperature hot water radiation heater 17-2 by the second antifreeze circulating pump 17-4 after being heated, and the radiation heat is mainly concentrated to heat, preserve heat and prevent freezing for the coal on the belt by utilizing the radiation heat exchange and focusing principles, thereby realizing the coal freezing prevention and saving the heat supply. The liquid supplementing pump 17-5 and the liquid supplementing water tank 17-6 mainly provide pressure stabilizing and liquid supplementing effects for the antifreeze system.
As shown in figure 5, the heat preservation end 18 of the coal mine high and large factory building mainly comprises a circulation heating unit 18-2 and a heat source piping system. The working principle is as follows: the heat energy of the hot water of the medium-low temperature heat source circularly heats the air in the plant through the built-in air-water heat exchanger of the circulating heating unit 18-2, and the air in the plant is heated and then is sent into the plant by the circulating fan, so that the heat preservation and heat supply effects of the plant are achieved. The utility model discloses a high big factory building heat preservation heat supply in colliery end 18 has that the heating capacity is big, and heat source temperature requires lowly, and the heat supply is effectual, and terminal heating system is simple, characteristics such as investment province.
Further, the utility model discloses a heat source is 50 ~ 65 ℃ middle and low temperature hot water, through the large-traffic design of little difference in temperature and contact operation, can satisfy coal mine production life building heating heat supply requirement under current terminal heating system's the setting condition completely. Specifically, the heating and heat-supplying terminal 19 of the coal mine production and living building is composed of an indoor radiator 19-1 (or a buried pipe, or a fan coil and other terminal heat-supplying equipment and a heat source pipe system, and the working principle is that medium-low temperature heat source hot water is directly sent into the indoor radiator 19-1 (or the buried pipe, or the fan coil and other terminal heat-supplying equipment) through a pipeline system, and indoor air is heated mainly in a natural convection mode so as to realize winter heating and heat preservation of a building room.
As shown in fig. 1, the PLC control unit includes a central PLC control cabinet 20, and a coal mine waste heat source end PLC control substation 21, a coal mine end heat supply end PLC control substation 22, and a heat source transmission and distribution end PLC control substation 23 respectively connected to the central PLC control cabinet 20 through a communication network.
The PLC centralized control part is communicated through a communication network system, each PLC station consists of hardware and software, has various information parameter input functions of the system and equipment, a parameter setting function needing to be regulated, and a command information output function of various equipment and execution mechanisms of the start-stop and regulation system, meets the demand balance in real time, has a software operation function and various management functions of better energy-saving operation mode selection, also has an analysis and statistics function of system operation results, and also has various protection and alarm functions and a communication function between a main station and substations or between substations.
The central PLC control cabinet 20 can compare the input parameters with the set parameters in real time according to the operation of the heating system and the equipment to obtain a deviation value, further obtain the output of regulation and control instruction information, and realize the balance of supply and demand and the energy-saving operation of the whole heating system by starting and stopping various equipment and actuating mechanisms of the regulation and control system.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (7)
1. The utility model provides a green heating system based on colliery waste heat utilization which characterized in that: including colliery waste heat source unit, heat source transportation and distribution unit, terminal heat supply unit in colliery and PLC the control unit, colliery waste heat source unit includes through series-parallel connection coupling connection's colliery ventilation air methane waste heat pump heat source (1), colliery waste heat pump heat source (2) of gushing water in the colliery, colliery pressure fan waste heat recovery heat source (3), colliery gas electricity generation waste heat recovery heat source (4), colliery coal slime stoving waste heat recovery heat source (5), coal mine pithead power plant exhaust steam waste heat recovery heat source (6), exhaust steam high back pressure waste heat recovery heat source (7) and/or heat pump air source heat source (8), heat source transportation and distribution unit includes with colliery waste heat source unit parallel connection's heating season hot water circulating pump (9) and non-heating season hot water circulating pump (10), hot water moisturizing pump (11) and moisturizing water tank (12) that are used for moisturizing, shunt water knockout drum (13) of being connected with colliery The source unit continuous shunts water collector (14), terminal heat supply unit in colliery includes colliery bathing hot water preparation end (15), colliery air inlet well head heat supply end (16) that prevents frostbite, colliery landing stage heat supply end (17), colliery high factory building heat supply end (18) and/or coal mine building heating end (19) that prevents frostbite, PLC the control unit include central PLC switch board (20) and through communication network respectively with colliery waste heat source end PLC control substation (21), the terminal heat supply end PLC control substation in colliery (22), heat source transmission and distribution end PLC control substation (23) that central PLC switch board (20) link to each other.
2. A green heating system according to claim 1, wherein: the coal mine ventilation air methane waste heat pump heat source (1) comprises a coal mine air return fan (1-1), a diffusion chamber (1-3) and a ventilation air heat pump mechanism which are sequentially communicated, and the ventilation air methane heat pump mechanism comprises a ventilation air methane heat pump heat-taking heat exchanger (1-4) arranged in the diffusion chamber (1-3), a compressor, a heat pump condenser (1-2) and an expansion valve which are sequentially connected with the ventilation air methane heat pump heat-taking heat exchanger (1-4) in series; the coal mine water burst waste heat pump heat source (2) comprises a drainage pump (2-1) arranged under a coal mine, a water storage pool (2-3) arranged on the ground, a water source side circulating pump (2-4) connected with the water storage pool (2-3) and a first water source heat pump unit (2-2).
3. A green heating system according to claim 1, wherein: the coal mine pressure fan waste heat recovery heat source (3) comprises an oil-water heat exchanger and an air-water heat exchanger which are connected in parallel with an air cooler of the pressure fan (3-1); the coal mine gas power generation waste heat recovery heat source (4) comprises a water-water heat exchanger (4-2) connected with an air cooler on a gas generator set (4-1) in parallel, a cylinder liner water internal circulation pump (4-4) connected with the water-water heat exchanger (4-2) and a flue gas-water heat exchanger (4-3) arranged in a smoke exhaust channel; the coal mine coal slime drying waste heat recovery heat source (5) comprises a slurry circulating pump (5-4) connected with a drying tail gas wet type desulfurization and denitrification mechanism (5-3) and a second water source heat pump unit (5-2) connected with the slurry circulating pump (5-4).
4. A green heating system according to claim 1, wherein: the coal mine pit mouth power plant exhaust steam waste heat recovery heat source (6) comprises a third water source heat pump unit (6-2) which is arranged on a cooling water loop of a condenser (6-3) of the power plant in parallel; the exhaust steam high-backpressure waste heat recovery heat source (7) comprises a valve switching mechanism (7-1) which is arranged on a cooling water loop of a condenser (6-3) of the power plant in parallel.
5. A green heating system according to claim 1, wherein: the coal mine bathing hot water preparation tail end (15) comprises a first middle plate type heat exchanger (15-1) connected with the branch water separator (13), a secondary circulating heating water pump (15-2) and a middle heat storage water tank (15-3) connected with the middle plate type heat exchanger (15-1), and a bathing hot water feed pump (15-4) connected with the middle heat storage water tank (15-3); the coal mine air inlet well mouth anti-freezing heat supply tail end (16) comprises a low-temperature well mouth anti-freezing heating unit (16-2) connected with the shunt water separator (13).
6. A green heating system according to claim 1, wherein: the coal mine trestle anti-freezing heat supply tail end (17) comprises a second intermediate plate type heat exchanger (17-3) connected with the shunt water distributor (13), a secondary anti-freezing solution circulating pump (17-4), a low-temperature hot water radiation heater (17-2) arranged on the trestle (17-1), a liquid supplementing pump (17-5) and a liquid supplementing water tank (17-6).
7. A green heating system according to claim 1, wherein: and the cycle heating unit (18-2) and the heat source pipe system are connected with the branch water separator (13) at the anti-freezing heat supply tail end (18) of the high and large coal mine workshop.
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| CN201921534350.0U CN210663030U (en) | 2019-09-16 | 2019-09-16 | Green heating system based on coal mine waste heat utilization |
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| CN201921534350.0U CN210663030U (en) | 2019-09-16 | 2019-09-16 | Green heating system based on coal mine waste heat utilization |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706911A (en) * | 2020-06-22 | 2020-09-25 | 中煤西安设计工程有限责任公司 | Intelligent monitoring system for coupling heat supply of dispersed clean heat sources in mining area based on Internet of things |
| CN112360585A (en) * | 2020-11-27 | 2021-02-12 | 中煤科工(天津)清洁能源研究院有限公司 | System for comprehensively utilizing coal mine waste heat |
| CN112503614A (en) * | 2019-09-16 | 2021-03-16 | 卡林热泵技术有限公司 | Green heating system based on coal mine waste heat utilization |
| CN114719322A (en) * | 2022-04-02 | 2022-07-08 | 中煤能源研究院有限责任公司 | Mining area multi-energy complementary clean heat supply system and use method |
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2019
- 2019-09-16 CN CN201921534350.0U patent/CN210663030U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503614A (en) * | 2019-09-16 | 2021-03-16 | 卡林热泵技术有限公司 | Green heating system based on coal mine waste heat utilization |
| CN111706911A (en) * | 2020-06-22 | 2020-09-25 | 中煤西安设计工程有限责任公司 | Intelligent monitoring system for coupling heat supply of dispersed clean heat sources in mining area based on Internet of things |
| CN112360585A (en) * | 2020-11-27 | 2021-02-12 | 中煤科工(天津)清洁能源研究院有限公司 | System for comprehensively utilizing coal mine waste heat |
| CN114719322A (en) * | 2022-04-02 | 2022-07-08 | 中煤能源研究院有限责任公司 | Mining area multi-energy complementary clean heat supply system and use method |
| CN114719322B (en) * | 2022-04-02 | 2024-04-02 | 中煤能源研究院有限责任公司 | Mining area multifunctional complementary clean heating system and application method thereof |
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