CN103115388B - Thermal power plant circulating water heat supply system - Google Patents

Thermal power plant circulating water heat supply system Download PDF

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Publication number
CN103115388B
CN103115388B CN201310071273.0A CN201310071273A CN103115388B CN 103115388 B CN103115388 B CN 103115388B CN 201310071273 A CN201310071273 A CN 201310071273A CN 103115388 B CN103115388 B CN 103115388B
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water
heating
power plant
thermal power
circulating
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CN103115388A (en
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岳建华
李勐
岳涛
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China Shenhua Energy Co Ltd
Beijing Guohua Electric Power Co Ltd
Shenhua Guohua Beijing Electric Power Research Institute Co Ltd
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China Shenhua Energy Co Ltd
Beijing Guohua Electric Power Co Ltd
Shenhua Guohua Beijing Electric Power Research Institute Co Ltd
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Abstract

The invention discloses a thermal power plant circulating water heat supply system. The thermal power plant circulating water heat supply system comprises a heat supply network, a water supply main pipeline (11) and a back water main pipeline (12) which are respectively connected with the heat supply network, and a plurality of heating users (5), wherein, each heating user is connected with the water supply main pipeline through a heating water supply branch pipeline (13), and is connected with the back water main pipeline through a heating back water branch pipeline (14), and a flow regulating valve (30) is arranged on the heating back water branch pipeline to regulate heating temperature on the heating users. Steam (dead steam) discharged by a steam turbine is utilized to generate circulating hot water in the heat supply network, the heat supply network is used for directly supplying hot water to heating for the heating users, and therefore energy utilization efficiency of a thermal power plant is effectively improved. In addition, the thermal power plant circulating water heat supply system further comprises a hot water supply network connected with the heat supply network and a refrigeration network, heat supply, hot water supply and refrigeration network are integrated, and therefore the energy utilization of the thermal power plane is maximized, and the purposes of energy conservation and emission reduction are achieved.

Description

Circulating-water in thermal power plant heating system
Technical field
The present invention relates to field of energy utilization, particularly, relate to a kind of circulating-water in thermal power plant heating system.
Background technology
In existing city heat supply net, the high-temperature-hot-water of 110 ~ 130 DEG C is supplied to each user community by steam power plant's (or heating plant), each user community utilizes above-mentioned high-temperature-hot-water that the water of the heating system of user community is heated to 70 ~ 80 DEG C by the water to water heater of local heat exchange station again, carries out heating for user.This heating process relative complex, and by high-temperature water by cool water heating to the relatively low hot water of temperature, the loss of heat certainly will be caused in transfer process, the object of energy-saving and emission-reduction can not be reached, too increase the cost of equipment simultaneously.
In addition, the low-temperature water heating of steam power plant, hot vapour etc. directly emit, and do not recycle well, cause the significant wastage of the energy equally.
Summary of the invention
The object of this invention is to provide a kind of circulating-water in thermal power plant heating system, this circulating-water in thermal power plant heating system can improve the efficiency of energy utilization of steam power plant effectively.
To achieve these goals, the invention provides a kind of circulating-water in thermal power plant heating system, this circulating-water in thermal power plant heating system comprises heating network, the vibration means for main pipe for supplying water road be connected with this heating network respectively and backwater main line and multiple heating user, wherein, each described heating user is connected to described vibration means for main pipe for supplying water road by heating water supply branch road, and be connected to described backwater main line by heating backwater branch road, described heating backwater branch road is provided with flow control valve, with the heating temperature regulating described heating user to locate.
Particularly, the circulating water temperature in described vibration means for main pipe for supplying water road is 70 ~ 80 DEG C, and the circulating water temperature in described backwater main line is 50 ~ 55 DEG C.
Preferably, multiple described heating user comprises low layer heating user and high-rise heating user, and the heating water supply branch road be connected with described high-rise heating user is serially connected with booster.
In embodiments of the present invention, described circulating-water in thermal power plant heating system comprises the first supplying hot water branch road, the first backheat water branch road and the water to water heater for heating cold water, described first supplying hot water branch road is connected between described vibration means for main pipe for supplying water road and the feed water inlet of described water to water heater, and described first backheat water branch road is connected between the water return outlet of described water to water heater and described backwater main line.
Further, described circulating-water in thermal power plant heating system comprises cold water storage cistern and boiler, described cold water storage cistern is connected to the cold water water inlet of described water to water heater by cold water pipeline, and described boiler is connected to the hot water outlet of described water to water heater by hot water line.
Preferably, described cold water pipeline is serially connected with supply-water pump.
Further, described circulating-water in thermal power plant heating system comprises hot water user, and the hot water of described boiler is supplied to described hot water user by hot water feeding pipe road, and the backwater of described hot water user flows back to described boiler by hot water backwater's pipeline.
Preferably, described hot water feeding pipe road is serially connected with heat-exchanger pump.
In embodiments of the present invention, described circulating-water in thermal power plant heating system also comprises the second supplying hot water branch road, the second backheat water branch road and the refrigeration machine for freezing, described second supplying hot water branch road is connected between described vibration means for main pipe for supplying water road and the feed water inlet of described refrigeration machine, and described second backheat water branch road is connected between the water return outlet of described refrigeration machine and described backwater main line.
Further, described circulating-water in thermal power plant heating system comprises air conditioner user, and the backwater of this air conditioner user flows to described refrigeration machine by refrigeration supply channel, and the chilled water after described refrigeration machine refrigeration is supplied to described air conditioner user by cooling water pipeline.
Preferably, described refrigeration supply channel is serially connected with water supply pump.
Preferably, described circulating-water in thermal power plant heating system also comprises the storage tank for moisturizing, and this storage tank is other to be connected between described air conditioner user and described water supply pump.
Preferably, described refrigeration machine is serially connected on described cold water pipeline.
Preferably, described circulating-water in thermal power plant heating system comprises the measurement mechanism for measuring pressure and temperature.
Preferably, described heating network comprises steam turbine and condenser, what described steam turbine was connected to described condenser by exhaust equipment of LP casing road enters steam ports, the recirculated water delivery port of described condenser is connected with described vibration means for main pipe for supplying water road, and described backwater main line is connected to the recirculated water water inlet of described condenser.
Preferably, described heating network also comprises heater, and this heater is serially connected on described vibration means for main pipe for supplying water road.
Preferably, described heater is vapor-water heat exchanger, and described steam turbine is connected to described heater by bleed steam pipework, and the steam pressure in described bleed steam pipework is 0.3 ~ 0.8MPa.
Further, described circulating-water in thermal power plant heating system also comprises cooling tower, and this cooling tower is connected to the recirculated water water inlet of described condenser by cooling tower supply channel, and is connected to the recirculated water delivery port of described condenser by cooling tower water return pipeline.
Preferably, described heating network also comprises water replanishing device, and this water replanishing device is other is connected on described backwater main line.
The steam (mainly referring to exhaust steam) utilizing steam turbine to discharge in heating network of the present invention produces circulating hot water, and heating user is warmed oneself by heating network direct heating water, effectively improves the efficiency of energy utilization of steam power plant.In addition, also comprise the heat supply network of rivers that is connected with heating network and the net that freeze in the present invention, this heat supply network of rivers and the net that freezes carry out supplying hot water and refrigeration because of the electric power without the need to being provided by steam power plant, thus decrease the consumption of high-grade energy (i.e. electric energy).In other words, the present invention will heat, supplying hot water and refrigerating integrated, to heat in the winter time, air conditioner refrigerating is used in summer, and supply supplying hot water in the whole year, thus reduce the energy ezpenditure of whole industrial chain, the using energy source of steam power plant is maximized, achieve the object of energy-saving and emission-reduction, reduce the carbon emission in city.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the schematic diagram of circulating-water in thermal power plant heating system of the present invention;
Fig. 2 is the structural representation of heating network of the present invention.
Description of reference numerals
1 steam turbine 2 condenser
3 heater 4 water replanishing devices
5 heating user 6 hot water users
7 air conditioner user 8 cooling towers
9 station boiler 10 exhaust equipment of LP casing roads
10a bleed steam pipework 11 vibration means for main pipe for supplying water road
12 backwater main line 13 heating water supply branch roads
14 heating backwater branch road 15 first supplying hot water branch roads
16 first backheat water branch road 17 second supplying hot water branch roads
18 second backheat water branch road 19 cold water pipelines
20 hot water line 21 hot water feeding pipe roads
22 hot water backwater's pipelines 23 freeze supply channel
24 cooling water pipeline 30 flow control valves
31 switch valve 32 boosters
33 water to water heater 34 cold water storage cisterns
35 boiler 36 supply-water pumps
37 heat-exchanger pump 38 refrigeration machines
39 water supply pump 40 storage tanks
41 measurement mechanism 44 butterfly valves
45 overflow passage 51 low layer heating users
52 high-rise heating user 81 cooling tower supply channels
82 cooling tower water return pipelines
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, term " first ", " second " etc. only for distinguishing different parts, device or different pipelines, and are not used in and specifically limit all parts, device and pipeline.
See Fig. 1, the present invention relates to a kind of circulating-water in thermal power plant heating system, this circulating-water in thermal power plant heating system comprises heating network, the vibration means for main pipe for supplying water road 11 be connected with heating network respectively and backwater main line 12 and multiple heating user 5, each heating user 5 is connected to vibration means for main pipe for supplying water road 11 by heating water supply branch road 13, and is connected to backwater main line 12 by heating backwater branch road 14.Due to the water temperature over-high or too low all by possibly cannot meet the demand of heating user to indoor temperature of recirculated water in vibration means for main pipe for supplying water road 11.Therefore the water temperature of recirculated water in vibration means for main pipe for supplying water road 11 is controlled at 70 ~ 80 DEG C.After heating completes, because the exchange heat of recirculated water is to air, the return water temperature of heating user 5 is reduced, and like this, the circulating water temperature in backwater main line 12 is roughly 50 ~ 55 DEG C.
Can find out, in the present invention, heating user 5 is warmed oneself by heating network direct heating water, effectively improves the efficiency of energy utilization of steam power plant.Heat because steam power plant is unified, its supplying hot water provided has identical temperature.Therefore, in order to meet the heating temperature needed for different heating users 5, the present invention is provided with flow control valve 30 on heating backwater branch road 14, to regulate the heating temperature at heating user 5 place.Such as, the aperture of adjust flux control valve 30, makes the circling water flow rate on heating backwater branch road 14 strengthen, to improve the heating temperature of heating user 5, otherwise, the circling water flow rate on heating backwater branch road 14 is reduced, the heating temperature of heating user 5 can be reduced.
See Fig. 1, the heating water supply branch road 13 of each heating user 5 is provided with switch valve 31, is preferably electric switching valve, so that a distant place opens and closes.During heating, switch valve 31 is opened, to heat to heating user 5; When not heating or pipeline safeguards, switch valve 31 cuts out, to stop heating to heating user 5.In addition, the upstream and downstream position of the flow control valve 30 on heating backwater branch road 14 is respectively connected in series a switch valve, simultaneously also by the above-mentioned flow control valve 30 of another switch valve and heating backwater branch road 14 with two switch valves are other connects.During heating, the switch valve that side connects cuts out, and flow control valve 30 and two switch valves be connected in series with it are opened, and make the circling water flow rate of heating user 5 adjustable, and are back to backwater main line 12; When not heating or pipeline safeguards, close flow control valve 30 and all switch valves, to stop heating to heating user 5; When flow control valve 30 breaks down, need to close the switch valve that is connected in series with it, and open the switch valve that side connects, with when not stopping to keep in repair flow control valve 30 when heating.
Under normal circumstances, heating user 5 comprises low layer heating user 51 and high-rise heating user 52.Wherein, low layer heating user 51 roughly refers to the heating user of less than ten layers, and high-rise heating user 52 roughly refers to the heating user of more than ten layers.Pressure due to the recirculated water from heating network is typically not enough to and is supplied to high-rise heating user 52.Therefore, need to be connected in series booster 32 on the heating water supply branch road 13 be connected with high-rise heating user 52, by booster 32 to improve the hydraulic pressure of recirculated water, and be pumped to high level.
The foregoing describing circulating-water in thermal power plant heating system provides the heat source water of 70 ~ 80 DEG C to heat.Be appreciated that heating can only occur in winter, in order to supply warm season non-, also can effectively utilize the heat source water of above-mentioned 70 ~ 80 DEG C, realizing energy-saving and emission-reduction.
Circulating-water in thermal power plant heating system of the present invention can also increase the heat supply network of rivers, using by the heat source water of 70 ~ 80 DEG C as heat medium, for carrying out supplying hot water to hot water user 6.These hot water user 6 refers to the user using hot water to carry out washing etc. various uses, and these users can be identical users with heating user, but are the use of different pipelines.
See Fig. 1, circulating-water in thermal power plant heating system of the present invention can comprise the first supplying hot water branch road 15, first backheat water branch road 16 and the water to water heater 33 for heating cold water, described first supplying hot water branch road 15 is connected between the feed water inlet of vibration means for main pipe for supplying water road 11 and water to water heater 33, described first backheat water branch road 16 is connected between the water return outlet of water to water heater 33 and backwater main line 12, like this, recirculated water from heating network can be used as the heat medium of water to water heater 33, to heat the cold water from hot water user 6, and be supplied to hot water user 6 to use the hot water after heating.As seen from the figure, identical with heating water supply branch road 13, the first supplying hot water branch road 15 is serially connected with switch valve, to stop the recirculated water supply on vibration means for main pipe for supplying water road 11 when safeguarding; First backheat water branch road 16 is provided with flow control valve, to regulate the flow of recirculated water, and then cold water can be controlled can by the temperature heated.
As shown in Figure 1, circulating-water in thermal power plant heating system of the present invention comprises cold water storage cistern 34 and boiler 35, and cold water storage cistern 34 can store city tap-water, and is connected to the cold water water inlet of water to water heater 33 by cold water pipeline 19, to provide cold water; Boiler 35 is connected to the hot water outlet of water to water heater 33 by hot water line 20, to receive hot water and to store.Be appreciated that when city tap-water net can ensure not interrupt supplying water, also cold water storage cistern 34 can not be set, but cold water pipeline 19 is directly connected with city tap-water net.
Concrete cool water heating process is: the recirculated water (70 ~ 80 DEG C) from vibration means for main pipe for supplying water road 11 enters Shui Shui via the first supplying hot water branch road 15 and adds device 33, the cold water (10 ~ 15 DEG C) of self-cooling water tank 34 enters the cold water water inlet of water to water heater 33 by cold water pipeline 19 simultaneously, now, the recirculated water that temperature is high and the low cold water of temperature carry out heat exchange, the temperature of recirculated water is reduced (being roughly 50 ~ 55 DEG C), realizes producing hot water to the heating of cold water; Then the recirculated water that temperature reduces flows out and flows back to backwater main line 12 by the first backheat water branch road 16 from water to water heater 33, the hot water (65 ~ 75 DEG C) simultaneously produced flows out from the hot water outlet of water to water heater 33 and is supplied to boiler 35 by hot water line 20, in order to storing and follow-up supply.In addition, boiler 35 is also connected with overflow passage 45, after boiler 35 exceeds water storage load, can open overflow passage 45, release portion hot water, to guarantee boiler 35 reliable operation.
Detailed description of the invention shown in Fig. 1 comprises two water to water heater 33, but water to water heater 33 should not be limited to the number shown in figure.The present invention comprises two water to water heater 33 and can be implemented in a water to water heater 33 when safeguarding, enables another water to water heater 33, thus can carry out heating cold water incessantly.Can find out, the pipeline that the first supplying hot water branch road 15 is connected with two water to water heater 33 is respectively serially connected with switch valve, by selecting opening or closing of different switch valve, with one of them water to water heater 33 of choice for use.The pipeline that two water to water heater 33 are connected with the first backheat water branch road is respectively serially connected with butterfly valve 44, to regulate the flow of recirculated water or to block the flowing of recirculated water.The butterfly valve 44 relevant to idle water to water heater 33 is in closed condition.
In addition, between the cold water water inlet and cold water pipeline 19 of water to water heater 33 and between the hot water outlet of water to water heater 33 and hot water line 20, described butterfly valve 44 is also serially connected with respectively, in order to choice for use water to water heater 33.In the present invention, those skilled in the art also can adopt other valves identical with butterfly valve 44 function according to demand.
Preferably, in above-mentioned cool water heating process, water to water heater 33 is more easily entered in order to make the cold water in cold water pipeline 19 have certain pressure, cold water pipeline 19 is connected in series supply-water pump 36, this supply-water pump 36 is preferably arranged on the position near cold water storage cistern 34, so that water supply pump is delivered to water to water heater 33.
In the starting stage of cool water heating, the hot water heated through water to water heater 33 possibly cannot reach required temperature, for this reason, boiler 35 can be communicated with cold water pipeline 19 in the starting stage of cool water heating, start this heating process with certain hot water, until after meeting required hot water temperature's requirement, then boiler 35 and cold water pipeline 19 are disconnected, supply cold water by cold water storage cistern 34 again, enter normal cool water heating process.
Described above is cool water heating process, hot water storage after heating is in boiler 35, and be supplied to hot water user 6 by hot water feeding pipe road 21, if hot water user 6 does not use this hot water, then the backwater of hot water user 6 will flow back in boiler 35 by hot water backwater's pipeline 22, wherein, the diameter of this hot water backwater's pipeline 22 is less than the diameter on hot water feeding pipe road 21.Equally, heat-exchanger pump 37 can be connected in series on hot water feeding pipe road 21, to improve the supply pressure of hot water, hot water can be supplied to be in the hot water user 6 of any high level.
The present invention by increasing the heat supply network of rivers in circulating-water in thermal power plant heating system, can at any time for user provides hot water in the four seasons, thus improve the efficiency of thermal cycle of steam power plant, the heat energy that the Low Temperature Steam effectively utilizing steam turbine 1 produces, and carry out cool water heating without the need to the electric power that user uses steam power plant to provide, decrease the waste in energy conversion.
In addition, in order to reduce energy waste further, circulating-water in thermal power plant heating system of the present invention can also comprise refrigeration net, to utilize the recirculated water of heating network to freeze, because the electric power without the need to being provided by steam power plant is freezed, decreases the waste of the energy.
See Fig. 1, circulating-water in thermal power plant heating system can comprise the second supplying hot water branch road 17, second backheat water branch road 18 and the refrigeration machine 38 for freezing, second supplying hot water branch road 17 is connected between the feed water inlet of vibration means for main pipe for supplying water road 11 and refrigeration machine 38, and the second backheat water branch road 18 is connected between the water return outlet of refrigeration machine 38 and backwater main line 12.Like this, the driving heat source of refrigeration machine 38 is can be used as from the recirculated water of heating network.Wherein, described refrigeration machine 38 mainly refers to lithium bromide refrigerator, but is not limited to lithium bromide refrigerator.Every refrigeration machine that the recirculated water of high temperature can be utilized to carry out driving all can be applied in the present invention.Be known in those skilled in the art about the structure of lithium bromide refrigerator and refrigeration principle, repeat no more.
As seen from Figure 1, identical with heating water supply branch road 13, the second supplying hot water branch road 17 being serially connected with switch valve, with when safeguarding, stopping the recirculated water supply on vibration means for main pipe for supplying water road 11; Second backheat water branch road 18 is provided with flow control valve, to regulate the flow of recirculated water, and then can refrigeration be controlled.
See Fig. 1, circulating-water in thermal power plant heating system comprises air conditioner user 7, and the backwater of this air conditioner user 7 flows to refrigeration machine 38 by refrigeration supply channel 23, and the chilled water after refrigeration machine 38 freezes is supplied to air conditioner user 7 by cooling water pipeline 24.Wherein, air conditioner user 7 refers to the user being mounted with central air conditioner system or single air conditioner.
Concrete process of refrigerastion is: the feed water inlet entering refrigeration machine 38 from the recirculated water (70 ~ 80 DEG C) on vibration means for main pipe for supplying water road 11 via the second supplying hot water branch road 17, work to drive refrigeration machine 38, simultaneously, the cold water relatively high from the temperature (10 ~ 12 DEG C) of air conditioner user 7 enters refrigeration machine 38 by refrigeration supply channel 23, and the chilled water (6 ~ 7 DEG C) formed after refrigeration machine 38 refrigeration is supplied to air conditioner user 7 again by cooling water pipeline 24.Meanwhile, the recirculated water as driving heat source flows back to backwater main line 12 by the second backheat water branch road 18, completes whole process of refrigerastion.
Preferably, in above-mentioned process of refrigerastion, refrigeration machine 38 is more easily entered in order to make the relatively high cold water of the temperature in refrigeration supply channel 23 have certain pressure, refrigeration supply channel 23 is connected in series water supply pump 39, this water supply pump 39 is preferably arranged on the position near air conditioner user 7, delivers to refrigeration machine 38 with the water supply pump that temperature is relatively high.
And, when the backwater quantity not sufficient of air conditioner user 7, storage tank 40 can also be increased, and be connected on other for storage tank 40 between air conditioner user 7 and water supply pump 39, be used for the cooling water of supplementary air-conditioning system, meet the refrigeration requirement of refrigeration machine 38.
More preferably, refrigeration machine 38 is serially connected on the cold water pipeline 19 in the heat supply network of rivers.Due to refrigeration machine 38 in process of refrigerastion by release heat, by being serially connected in after on cold water pipeline 19 by refrigeration machine 38, the heat that refrigeration machine 38 discharges may be used for preheating of cold water in the heat supply network of rivers.As shown in Figure 1, cold water storage cistern 34 provides the cold water being roughly 10 ~ 15 DEG C, is being formed as the cold water of 15 ~ 20 DEG C, and then is heated by water to water heater 33 after the preheating of refrigeration machine 38.The heat recovery of refrigeration net release in the heat supply network of rivers, makes the used heat of system be fully used by this preheating process.It should be noted that, in the winter time, need just cold water pipeline 19 to open in the bypass valve (not shown) of refrigeration machine 38, run to exit refrigeration machine 38.
In whole circulating-water in thermal power plant heating system, can arrange the measurement mechanism 41 for measuring pressure and temperature in many places, this measurement mechanism 41 includes but not limited to Pressure gauge and thermometer etc.In the present invention, mainly measurement mechanism 41 is arranged on heating water supply branch road 13, heating backwater branch road 14, first supplying hot water branch road 15, first backheat water branch road 16, second supplying hot water branch road 17 and the second backheat water branch road 18.The force value recorded according to measurement mechanism 41 and temperature value, can monitor whole system whether normal operation by heat pipe monitor system system.Wherein, heat pipe monitor system system can be content known in those skilled in the art, is not described in detail at this.
See Fig. 2, heating network involved in the present invention has various structures form, to provide the heat source water of 70 ~ 80 DEG C.In the embodiment shown in figure 2, heating network comprises steam turbine 1 and condenser 2, what steam turbine 1 was connected to condenser 2 by exhaust equipment of LP casing road 10 enters steam ports (in practical operation, steam turbine 1 directly UNICOM enters steam ports in condenser 2), so that the low-pressure steam not used for generating is supplied to condenser 2, condenser 2 is by the steam-condensation from steam turbine 1, and condensed condensate water recycles at power plant thermal system.
In the condensation process of above-mentioned condenser 2, using recirculated water as cooling medium, is namely that in the process of condensate water, recirculated water absorbs heat as cooling medium, thus circulating water temperature is raised at steam-condensation.Like this, the recirculated water delivery port of condenser 2 is connected with vibration means for main pipe for supplying water road 11, just can provide the heat source water of 70 ~ 80 DEG C, and backwater main line 12 is connected to the recirculated water water inlet of condenser 2, using by the backwater in backwater main line 12 again as the cooling medium of condenser 2.
In the cyclic process of circulating-water in thermal power plant, inevitably there is the situation of discharge reduction, thus can water replanishing device 4 be set in heating network.As shown in Figure 2, water replanishing device 4 is other is connected on backwater main line 12.This water replanishing device 4 can support the water-refilling operation of a hour when maximum water circulation flow.
Preferably, in special arctic weather, lower and when can not meet the demands, the recirculated water of the recirculated water delivery port from condenser 2 can be heated, and then be supplied to heating user 5 in the water temperature of the recirculated water that condenser 2 may provide.See Fig. 2, in the present invention, heating network can also comprise heater 3, and this heater 3 is serially connected on vibration means for main pipe for supplying water road 11, but the present invention is not limited thereto, and heater 3 also can be arranged on steam power plant.Wherein, heater 3 can be polytype heater, such as, can be steam water heater, combustion heater, fuel heater or coal heater etc., but be not limited to above-mentioned heater types.
Preferably, above-mentioned heater 3 is vapor-water heat exchanger, and like this, vapor-water heat exchanger can directly utilize drawing gas of steam turbine 1 to carry out heating operation, in order to improve the temperature of recirculated water in heating network.As shown in Figure 2, steam turbine 1 is connected to heater 3 by bleed steam pipework 10a.Wherein be provided with vapor extractor (not shown) to carry out operation of drawing gas, be known in those skilled in the art about vapor extractor and the process of drawing gas, do not repeat them here.In addition, the steam pressure in bleed steam pipework 10a is 0.3 ~ 0.8MPa, to be applicable to the job requirement of vapor-water heat exchanger.In this vapor-water heat exchanger, the steam of steam turbine 1 with carry out heat exchange from recirculated water in condenser 2, recirculated water is heated, and be condensed into water after steam release heat, the condensate water of vapor-water heat exchanger can have identical purposes with the condensate water of condenser 2 simultaneously.
In addition, identical with the electricity generation system of existing steam power plant, circulating-water in thermal power plant heating system of the present invention also comprises cooling tower 8, this cooling tower 8 is connected to the recirculated water water inlet of condenser 2 by cooling tower supply channel 81, and is connected to the recirculated water delivery port of condenser 2 by cooling tower water return pipeline 82.When the recirculated water of condenser 2 does not need to carry out heating or carrying out other purposes, cooling medium can be provided by cooling tower 8, to absorb the heat that steam-condensation discharges for condensate water in condenser 2.Cooling tower 8 as the reserved cooling system that ought not carry out circulating water heating to user, with meet power plant run needs; Cooling tower 8 also can coordinate heating network to complete the needs of thermic load adjustment simultaneously, and this part technology is known in those skilled in the art, does not repeat them here.
According to the above, the present invention will heat, supplying hot water and refrigerating integrated, the Low Temperature Steam utilizing steam turbine to discharge produces circulating hot water, to heat in the winter time, be used for air conditioner refrigerating in summer, and carry out supplying hot water in the whole year, thus reduce whole industrial chain energy ezpenditure, the using energy source of steam power plant is maximized, achieves the object of energy-saving and emission-reduction.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.As long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims (15)

1. a circulating-water in thermal power plant heating system, this circulating-water in thermal power plant heating system comprises heating network, the vibration means for main pipe for supplying water road (11) be connected with this heating network respectively and backwater main line (12) and multiple heating user (5), it is characterized in that, each described heating user (5) is connected to described vibration means for main pipe for supplying water road (11) by the heating branch road (13) that supplies water, and be connected to described backwater main line (12) by heating backwater branch road (14), described heating backwater branch road (14) is provided with flow control valve (30), to regulate the heating temperature at described heating user (5) place, described circulating-water in thermal power plant heating system comprises the first supplying hot water branch road (15), first backheat water branch road (16) and the water to water heater (33) for heating cold water, described first supplying hot water branch road (15) is connected between the feed water inlet of described vibration means for main pipe for supplying water road (11) and described water to water heater (33), described first backheat water branch road (16) is connected between the water return outlet of described water to water heater (33) and described backwater main line (12), described circulating-water in thermal power plant heating system comprises cold water storage cistern (34) and boiler (35), described cold water storage cistern (34) is connected to the cold water water inlet of described water to water heater (33) by cold water pipeline (19), described boiler (35) is connected to the hot water outlet of described water to water heater (33) by hot water line (20), described circulating-water in thermal power plant heating system also comprises the second supplying hot water branch road (17), second backheat water branch road (18) and the refrigeration machine (38) for freezing, described second supplying hot water branch road (17) is connected between the feed water inlet of described vibration means for main pipe for supplying water road (11) and described refrigeration machine (38), described second backheat water branch road (18) is connected between the water return outlet of described refrigeration machine (38) and described backwater main line (12), described refrigeration machine (38) is serially connected on described cold water pipeline (19), to heat the cold water in described cold water pipeline (19).
2. circulating-water in thermal power plant heating system according to claim 1, is characterized in that, the circulating water temperature in described vibration means for main pipe for supplying water road (11) is 70 ~ 80 DEG C, and the circulating water temperature in described backwater main line (12) is 50 ~ 55 DEG C.
3. circulating-water in thermal power plant heating system according to claim 1, it is characterized in that, multiple described heating user (5) comprises low layer heating user (51) and high-rise heating user (52), and the heating water supply branch road (13) be connected with described high-rise heating user (52) is serially connected with booster (32).
4. circulating-water in thermal power plant heating system according to claim 1, is characterized in that, described cold water pipeline (19) is serially connected with supply-water pump (36).
5. circulating-water in thermal power plant heating system according to claim 1, it is characterized in that, described circulating-water in thermal power plant heating system comprises hot water user (6), the hot water of described boiler (35) is supplied to described hot water user (6) by hot water feeding pipe road (21), and the backwater of described hot water user (6) flows back to described boiler (35) by hot water backwater's pipeline (22).
6. circulating-water in thermal power plant heating system according to claim 5, is characterized in that, described hot water feeding pipe road (21) is serially connected with heat-exchanger pump (37).
7. circulating-water in thermal power plant heating system according to claim 1, it is characterized in that, described circulating-water in thermal power plant heating system comprises air conditioner user (7), the backwater of this air conditioner user (7) flows to described refrigeration machine (38) by refrigeration supply channel (23), and the chilled water after described refrigeration machine (38) refrigeration is supplied to described air conditioner user (7) by cooling water pipeline (24).
8. circulating-water in thermal power plant heating system according to claim 7, is characterized in that, described refrigeration supply channel (23) is serially connected with water supply pump (39).
9. circulating-water in thermal power plant heating system according to claim 8, it is characterized in that, described circulating-water in thermal power plant heating system also comprises the storage tank (40) for moisturizing, and this storage tank (40) is other to be connected between described air conditioner user (7) and described water supply pump (39).
10. circulating-water in thermal power plant heating system according to claim 1, is characterized in that, described circulating-water in thermal power plant heating system comprises the measurement mechanism (41) for measuring pressure and temperature.
11. circulating-water in thermal power plant heating systems according to claim 1 and 2, it is characterized in that, described heating network comprises steam turbine (1) and condenser (2), what described steam turbine (1) was connected to described condenser (2) by exhaust equipment of LP casing road (10) enters steam ports, the recirculated water delivery port of described condenser (2) is connected with described vibration means for main pipe for supplying water road (11), and described backwater main line (12) is connected to the recirculated water water inlet of described condenser (2).
12. circulating-water in thermal power plant heating systems according to claim 11, is characterized in that, described heating network also comprises heater (3), and this heater (3) is serially connected on described vibration means for main pipe for supplying water road (11).
13. circulating-water in thermal power plant heating systems according to claim 12, it is characterized in that, described heater (3) is vapor-water heat exchanger, described steam turbine (1) is connected to described heater (3) by bleed steam pipework (10a), and the steam pressure in described bleed steam pipework (10a) is 0.3 ~ 0.8MPa.
14. circulating-water in thermal power plant heating systems according to claim 11, it is characterized in that, described circulating-water in thermal power plant heating system also comprises cooling tower (8), this cooling tower (8) is connected to the recirculated water water inlet of described condenser (2) by cooling tower supply channel (81), and is connected to the recirculated water delivery port of described condenser (2) by cooling tower water return pipeline (82).
15. circulating-water in thermal power plant heating systems according to claim 11, is characterized in that, described heating network also comprises water replanishing device (4), and this water replanishing device (4) is other to be connected on described backwater main line (12).
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CN103453662A (en) * 2013-08-27 2013-12-18 洛阳双瑞精铸钛业有限公司 Domestic water heater
CN104791879B (en) * 2015-04-02 2017-09-19 王明星 A kind of long-range systemic circulation graded supply system
CN114151856A (en) * 2021-12-21 2022-03-08 新疆伟源节能科技有限公司 Cogeneration energy-saving control platform

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