CN103115388A - Thermal power plant circulating water heat supply system - Google Patents
Thermal power plant circulating water heat supply system Download PDFInfo
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- CN103115388A CN103115388A CN2013100712730A CN201310071273A CN103115388A CN 103115388 A CN103115388 A CN 103115388A CN 2013100712730 A CN2013100712730 A CN 2013100712730A CN 201310071273 A CN201310071273 A CN 201310071273A CN 103115388 A CN103115388 A CN 103115388A
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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
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, steam power plant's (or heating plant) supplies to each user residential quarter with the high-temperature-hot-water of 110～130 ℃, each user residential quarter water to water heater of the heat exchange station by the locality again utilizes above-mentioned high-temperature-hot-water that the water of the heating system of user residential quarter is heated to 70～80 ℃, carries out heating for the user.This heating process relative complex, and by high-temperature water with cool water heating to the relatively low hot water of temperature, certainly will cause the loss of heat in transfer process, can not reach the purpose of energy-saving and emission-reduction, also increased simultaneously the cost of equipment.
In addition, the low-temperature water heating of steam power plant, hot vapour etc. directly emit, and do not carry out well recyclingly, have caused equally the significant wastage of the energy.
Summary of the invention
The purpose 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 that is connected with this heating network respectively and backwater main line and a plurality of heating user, wherein, each described heating user is connected in described vibration means for main pipe for supplying water road by heating water supply branch road, and be connected in described backwater main line by heating backwater branch road, be provided with flow control valve on described heating backwater branch road, to regulate the heating temperature at described heating user place.
Particularly, the circulating water temperature in described vibration means for main pipe for supplying water road is 70～80 ℃, and the circulating water temperature in described backwater main line is 50～55 ℃.
Preferably, a plurality of described heating users comprise low layer heating user and high-rise heating user, and are serially connected with booster on heating water supply branch road that described high-rise heating user is connected.
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 is used for the water to water heater of heating cold water, described the first supplying hot water branch road is connected between the feed water inlet of described vibration means for main pipe for supplying water road and described water to water heater, and described the first backheat water branch road is connected between the water return outlet and described backwater main line of described water to water heater.
Further, described circulating-water in thermal power plant heating system comprises cold water storage cistern and boiler, described cold water storage cistern is connected in the cold water water inlet of described water to water heater by the cold water pipeline, described boiler is connected in the hot water outlet of described water to water heater by the hot water line.
Preferably, be serially connected with supply-water pump on described cold water pipeline.
Further, described circulating-water in thermal power plant heating system comprises the hot water user, and the hot water of described boiler is supplied to described hot water user by the hot water feeding pipe road, and described hot water user's backwater flows back to described boiler by hot water backwater's pipeline.
Preferably, be serially connected with heat-exchanger pump on described hot water feeding pipe road.
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 is used for the refrigeration machine of refrigeration, described the second supplying hot water branch road is connected between the feed water inlet of described vibration means for main pipe for supplying water road and described refrigeration machine, and described the second backheat water branch road is connected between the water return outlet and described backwater main line of described refrigeration machine.
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 the refrigeration supply channel, and the chilled water after described refrigeration machine refrigeration is supplied to described air conditioner user by cooling water pipeline.
Preferably, be serially connected with water supply pump on described refrigeration supply channel.
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 gaging pressure and temperature.
Preferably, described heating network comprises steam turbine and condenser, described steam turbine is connected in the steam ports that enters of described condenser by the exhaust equipment of LP casing road, 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 in 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 in 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 in the recirculated water water inlet of described condenser by the cooling tower supply channel, and is connected in the recirculated water delivery port of described condenser by the cooling tower water return pipeline.
Preferably, described heating network also comprises water replanishing device, is connected on described backwater main line by this water replanishing device.
Utilize the steam (mainly referring to exhaust steam) that steam turbine is discharged to produce circulating hot water in heating network of the present invention, the heating user is warmed oneself by heating network direct heating water, has effectively improved the efficiency of energy utilization of steam power plant.In addition, also comprise the heat supply network of rivers and the refrigeration net that are connected with heating network in the present invention, this heat supply network of rivers and refrigeration net carry out supplying hot water and refrigeration because of the electric power that need not to provide by steam power plant, thereby have reduced the consumption of high-grade energy (being electric energy).In other words, the present invention is with heating, supplying hot water and refrigerating integrated, to heat in the winter time, be used for air conditioner refrigerating in summer, and supply supplying hot water in the whole year, thereby reduce the energy consumption of whole industrial chain, the using energy source of steam power plant is maximized, realize the purpose of energy-saving and emission-reduction, reduced the carbon emission in city.
Other features and advantages of the present invention will partly be described in detail in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification, is used from explanation the present invention with the following specific embodiment one, but is not construed as limiting the invention.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 condensers
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 roads
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 pipeline 23 refrigeration supply channels
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
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, the specific embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
In the present invention, term " first ", " second " etc. only are used for distinguishing different parts, device or different pipelines, and are not used in concrete restriction all parts, device and pipeline.
Referring to Fig. 1, the present invention relates to a kind of circulating-water in thermal power plant heating system, vibration means for main pipe for supplying water road 11 and backwater main line 12 and a plurality of heating user 5 that this circulating-water in thermal power plant heating system comprises heating network, is connected with heating network respectively, each heating user 5 is connected in vibration means for main pipe for supplying water road 11 by heating water supply branch road 13, and is connected in backwater main line 12 by heating backwater branch road 14.Due to the water temperature over-high of recirculated water in vibration means for main pipe for supplying water road 11 or too lowly all will possibly can't satisfy the heating user to the demand of indoor temperature.Therefore the water temperature with recirculated water in vibration means for main pipe for supplying water road 11 is controlled at 70～80 ℃.After heating is completed, to air, make heating user 5 return water temperature reduce because of the exchange heat of recirculated water, like this, the circulating water temperature in backwater main line 12 is roughly 50～55 ℃.
Can find out, in the present invention, heating user 5 is warmed oneself by heating network direct heating water, has effectively improved the efficiency of energy utilization of steam power plant.Heat because steam power plant is unified, its supplying hot water that provides has identical temperature.Therefore, in order to satisfy the different required heating temperatures of heating user 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 places.For example, the aperture of adjust flux control valve 30 strengthens the circling water flow rate on heating backwater branch road 14, with raising heating user 5 heating temperature, otherwise, the circling water flow rate on heating backwater branch road 14 is reduced, can reduce heating user 5 heating temperature.
Referring to Fig. 1, be provided with switch valve 31 on each heating user's 5 heating water supply branch road 13, be 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; Do not heating or pipeline when safeguarding, switch valve 31 cuts out, to stop 5 heating to the heating user.In addition, the upstream and downstream position of the flow control valve 30 on heating backwater branch road 14 respectively is connected in series a switch valve, simultaneously also with above-mentioned flow control valve 30 and two other connecing of switch valves of another switch valve and heating backwater branch road 14.During heating, the switch valve that the side connects cuts out, and flow control valve 30 and two switch valves that are connected in series with it are opened, and heating user 5 circling water flow rate can be regulated, and be back to backwater main line 12; Not heating or pipeline when safeguarding, close flow control valve 30 and all switch valves, to stop 5 heating to the heating user; When flow control valve 30 breaks down, need to close the switch valve that is connected in series with it, and open the other switch valve that connects, with in the situation that do not stop heating and to keep in repair flow control valve 30.
Generally, 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 below ten layers, and high-rise heating user 52 roughly refers to the heating user more than ten layers.Because the pressure from the recirculated water of heating network is not enough to it is supplied to high-rise heating user 52 usually.Therefore, need to heating water supply branch road 13 that high-rise heating user 52 is connected on serial connection booster 32, improving the hydraulic pressure of recirculated water, and be pumped to high level by booster 32.
More than having described the circulating-water in thermal power plant heating system provides the heat source water of 70～80 ℃ heating.Be appreciated that heating can only occur in winter, in order also to effectively utilize the heat source water of above-mentioned 70～80 ℃ non-for warm season, realize 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, with the heat source water of 70～80 ℃ as heat medium, be used for hot water user 6 is carried out supplying hot water.The user of the various uses such as these hot water user 6 refers to use that hot water washs, these users and heating user can be identical users, but have used different pipelines.
referring to Fig. 1, circulating-water in thermal power plant heating system of the present invention can comprise the first supplying hot water branch road 15, the first backheat water branch road 16 and be used for the water to water heater 33 of heating cold water, described the 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 the first backheat water branch road 16 is connected between the water return outlet and backwater main line 12 of water to water heater 33, like this, can be used as the heat medium of water to water heater 33 from the recirculated water of heating network, so that the cold water from hot water user 6 is heated, and the hot water after heating is supplied to hot water user 6 to use.As seen from the figure, identical with heating water supply branch road 13, be serially connected with switch valve on the first supplying hot water branch road 15, to stop the recirculated water supply on vibration means for main pipe for supplying water road 11 when safeguarding; Be provided with flow control valve on the first backheat water branch road 16, regulating the flow of recirculated water, and then can control cold water can heated temperature.
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 in the cold water water inlet of water to water heater 33 by cold water pipeline 19, so that cold water to be provided; Boiler 35 is connected in 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 in the situation that the city tap-water net can guarantee not interrupt supplying water, also cold water storage cistern 34 can be set, but cold water pipeline 19 directly is connected with the city tap-water net.
Concrete cool water heating process is: enter Shui Shui from the recirculated water (70～80 ℃) on vibration means for main pipe for supplying water road 11 via the first supplying hot water branch road 15 and add device 33, the cold water of self-cooling water tank 34 (10～15 ℃) enters the cold water water inlet of water to water heater 33 by cold water pipeline 19 simultaneously, at this moment, the cold water that the recirculated water that temperature is high and temperature are low carries out heat exchange, make the temperature of recirculated water reduce (being roughly 50～55 ℃), realize the heating of cold water is produced hot water; Then the recirculated water of temperature reduction flows out from water to water heater 33 and flows back to backwater main line 12 by the first backheat water branch road 16, produced simultaneously hot water (65～75 ℃) flows out and is supplied to boiler 35 by hot water line 20 from the hot water outlet of water to water heater 33, in order to storing and follow-up supply.In addition, boiler 35 also is connected with overflow passage 45, after boiler 35 exceeds the water storage load, can open overflow passage 45, and release portion hot water is to guarantee boiler 35 reliable operations.
Comprise two water to water heater 33 in the specific embodiment shown in Figure 1, but water to water heater 33 should not be limited to the number that shows in figure.The present invention comprises that two water to water heater 33 can realize enabling another water to water heater 33, thereby can heating incessantly cold water when a water to water heater 33 is safeguarded.Can find out, be serially connected with switch valve respectively with on pipeline that two water to water heater 33 are connected at the first supplying hot water branch road 15, by selecting opening or closing of different switch valves, with one of them water to water heater 33 of choice for use.Be serially connected with butterfly valve 44 respectively with on pipeline that the first backheat water branch road is connected at two water to water heater 33, with the flow of regulating recirculated water or block flowing of recirculated water.The butterfly valve 44 relevant to idle water to water heater 33 is in closed condition.
In addition, also being serially connected with respectively described butterfly valve 44 between the cold water water inlet of water to water heater 33 and cold water pipeline 19 and between the hot water outlet of water to water heater 33 and hot water line 20, 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 functions according to demand.
Preferably, in above-mentioned cool water heating process, in order to make the cold water in cold water pipeline 19 have certain pressure and more easily enter water to water heater 33, serial connection supply-water pump 36 on cold water pipeline 19, this supply-water pump 36 preferably is arranged on the position near cold water storage cistern 34, water supply pump is delivered to water to water heater 33.
In the starting stage of cool water heating, hot water through water to water heater 33 heating possibly can't reach needed temperature, for this reason, starting stage at cool water heating can be communicated with boiler 35 with cold water pipeline 19, start this heating process with certain hot water, until after satisfying 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 the 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, hot water user 6 backwater 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, can be on hot water feeding pipe road 21 serial connection heat-exchanger pump 37, to improve the supply pressure of hot water, to make hot water to be supplied to the hot water user 6 who is in any high level.
The present invention is by the increase heat supply network of rivers in the circulating-water in thermal power plant heating system, can provide hot water for the user at any time in the four seasons, thereby improved the efficiency of thermal cycle of steam power plant, effectively utilize the heat energy of the Low Temperature Steam generation of steam turbine 1, use the electric power that steam power plant provides to carry out cool water heating and need not the user, reduced the waste in the energy conversion.
In addition, in order further to reduce energy waste, circulating-water in thermal power plant heating system of the present invention can also comprise the refrigeration net, freezes with the recirculated water that utilizes heating network, because need not to freeze by the electric power that steam power plant provides, has reduced the waste of the energy.
Referring to Fig. 1, the circulating-water in thermal power plant heating system can comprise the second supplying hot water branch road 17, the second backheat water branch road 18 and be used for the refrigeration machine 38 of refrigeration, the 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 and backwater main line 12 of refrigeration machine 38.Like this, can be used as the driving heat source of refrigeration machine 38 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.The refrigeration machine that every recirculated water that can utilize high temperature drives all can be applied in the present invention.Structure and refrigeration principle about lithium bromide refrigerator are known in those skilled in the art, repeat no more.
As seen from Figure 1, identical with heating water supply branch road 13, be serially connected with switch valve on the second supplying hot water branch road 17, with when safeguarding, stop the recirculated water supply on vibration means for main pipe for supplying water road 11; Be provided with flow control valve on the second backheat water branch road 18, with the flow of adjusting recirculated water, and then can control refrigeration.
Referring to Fig. 1, the 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 refrigeration is supplied to air conditioner user 7 by cooling water pipeline 24.Wherein, air conditioner user 7 refers to be mounted with the user of central air conditioner system or single air conditioner.
Concrete process of refrigerastion is: the recirculated water (70～80 ℃) from vibration means for main pipe for supplying water road 11 enters the feed water inlet of refrigeration machine 38 via the second supplying hot water branch road 17, to drive refrigeration machine 38 work, simultaneously, the cold water relatively high from the temperature (10～12 ℃) of air conditioner user 7 enters refrigeration machine 38 by refrigeration supply channel 23, and the chilled water that forms after refrigeration machine 38 refrigerations (6～7 ℃) is supplied to air conditioner user 7 again by cooling water pipeline 24.Simultaneously, flow back to backwater main line 12 as the recirculated water of driving heat source by the second backheat water branch road 18, complete whole process of refrigerastion.
Preferably, in above-mentioned process of refrigerastion, in order to make the relatively high cold water of temperature in refrigeration supply channel 23 have certain pressure and more easily enter refrigeration machine 38, serial connection water supply pump 39 on refrigeration supply channel 23, this water supply pump 39 preferably is 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, in the situation that the backwater quantity not sufficient of air conditioner user 7 can also increase storage tank 40, and will be connected between air conditioner user 7 and water supply pump 39 by storage tank 40, be used for replenishing the cooling water of air-conditioning system, satisfy the refrigeration requirement of refrigeration machine 38.
More preferably, refrigeration machine 38 is serially connected on cold water pipeline 19 in the heat supply network of rivers.Due to refrigeration machine 38 in process of refrigerastion with release heat, after being serially connected in refrigeration machine 38 on cold water pipeline 19, the heat that refrigeration machine 38 discharges can be used for preheating of heat supply network of rivers cold water.As shown in Figure 1, cold water storage cistern 34 provides and is roughly the cold water of 10～15 ℃, is forming the cold water of 15～20 ℃ after the preheating of refrigeration machine 38, and then is being heated by water to water heater 33.This preheats process will freeze heat recovery that net discharges in the heat supply network of rivers, and the used heat of system is fully used.Need to prove, in the winter time, just cold water pipeline 19 is opened in the bypass valve (not shown) of refrigeration machine 38, to withdraw from refrigeration machine 38 operations.
In whole circulating-water in thermal power plant heating system, can be provided in many places the measurement mechanism 41 of gaging pressure and temperature, 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, the first supplying hot water branch road 15, the first backheat water branch road 16, the second supplying hot water branch road 17 and the second backheat water branch road 18.The force value and the temperature value that record according to measurement mechanism 41 can be monitored whether normal operation of whole system by the heat supply network monitoring system.Wherein, the heat supply network monitoring system can be content known in those skilled in the art, is not elaborated at this.
Referring to Fig. 2, in the present invention, related heating network has the various structures form, so that the heat source water of 70～80 ℃ to be provided.In embodiment shown in Figure 2, heating network comprises steam turbine 1 and condenser 2, steam turbine 1 enters steam ports (in practical operation by what exhaust equipment of LP casing road 10 was connected in condenser 2, the direct UNICOM of steam turbine 1 is in the steam ports that enters of condenser 2), offer condenser 2 with the low-pressure steam that will not be used for generating, condenser 2 will be from the steam-condensation of steam turbine 1, and condensed condensate water recycles at power plant thermal system.
In the condensation process of above-mentioned condenser 2, use recirculated water as cooling medium, be namely in the process of condensate water at steam-condensation, recirculated water absorbs heat as cooling medium, thereby circulating water temperature is raise.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 ℃, and backwater main line 12 is connected in the recirculated water water inlet of condenser 2, with 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, the situation of discharge reduction unavoidably can occur, thereby water replanishing device 4 can 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 be in the situation that maximum water circulation flow be supported the moisturizing operation of a hour.
Preferably, in special arctic weather, the water temperature of the recirculated water that may provide at condenser 2 is lower and can not meet the demands the time, can the recirculated water from the recirculated water delivery port of condenser 2 be heated, and then is supplied to heating user 5.Referring to 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 invention is not restricted to this, 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 in heater 3 by bleed steam pipework 10a.Wherein being provided with the vapor extractor (not shown) with the operation of drawing gas, is known in those skilled in the art about vapor extractor and the process of drawing gas, and does 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, make recirculated water be heated, be condensed into water after the steam release heat simultaneously, the condensate water of vapor-water heat exchanger can have identical purposes with the condensate water of condenser 2.
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 in the recirculated water water inlet of condenser 2 by cooling tower supply channel 81, and is connected in the recirculated water delivery port of condenser 2 by cooling tower water return pipeline 82.The recirculated water of condenser 2 does not need to heat or when carrying out other purposes, can provide cooling medium by cooling tower 8, to absorb the heat that steam-condensation discharges as condensate water in condenser 2.Cooling tower 8 is not as ought carrying out the reserved cooling system of circulating water heating, to satisfy the needs of power plant's operation to the user; Cooling tower 8 also can coordinate heating network to complete the needs that thermic load is adjusted 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 is with heating, supplying hot water and refrigerating integrated, utilize the Low Temperature Steam that steam turbine is discharged to produce 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, thereby reduced the consumption of whole industrial chain energy, the using energy source of steam power plant is maximized, realized the purpose of energy-saving and emission-reduction.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; in technical conceive scope 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.
Need to prove in addition, each concrete technical characterictic described in the above-mentioned specific embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible combinations.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 (20)
1. 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) that is connected with this heating network respectively and backwater main line (12) and a plurality of heating user (5), it is characterized in that, each described heating user (5) is connected in described vibration means for main pipe for supplying water road (11) by heating water supply branch road (13), and be connected in described backwater main line (12) by heating backwater branch road (14), be provided with flow control valve (30) on described heating backwater branch road (14), the heating temperature of locating to regulate described heating user (5).
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 ℃, and the circulating water temperature in described backwater main line (12) is 50～55 ℃.
3. circulating-water in thermal power plant heating system according to claim 1, it is characterized in that, a plurality of described heating users (5) comprise low layer heating user (51) and high-rise heating user (52), and are serially connected with booster (32) on heating water supply branch road (13) that described high-rise heating user (52) is connected.
4. circulating-water in thermal power plant heating system according to claim 1 and 2, it is characterized in that, described circulating-water in thermal power plant heating system comprises the first supplying hot water branch road (15), the first backheat water branch road (16) and is used for the water to water heater (33) of heating cold water, described the 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), and described the first backheat water branch road (16) is connected between the water return outlet and described backwater main line (12) of described water to water heater (33).
5. circulating-water in thermal power plant heating system according to claim 4, it is characterized in that, 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 in the cold water water inlet of described water to water heater (33) by cold water pipeline (19), described boiler (35) is connected in the hot water outlet of described water to water heater (33) by hot water line (20).
6. circulating-water in thermal power plant heating system according to claim 5, is characterized in that, is serially connected with supply-water pump (36) on described cold water pipeline (19).
7. circulating-water in thermal power plant heating system according to claim 5, 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 described hot water user's (6) backwater flows back to described boiler (35) by hot water backwater's pipeline (22).
8. circulating-water in thermal power plant heating system according to claim 7, is characterized in that, is serially connected with heat-exchanger pump (37) on described hot water feeding pipe road (21).
9. 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 also comprises the second supplying hot water branch road (17), the second backheat water branch road (18) and is used for the refrigeration machine (38) of refrigeration, described the 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), and described the second backheat water branch road (18) is connected between the water return outlet and described backwater main line (12) of described refrigeration machine (38).
10. circulating-water in thermal power plant heating system according to claim 4, it is characterized in that, described circulating-water in thermal power plant heating system also comprises the second supplying hot water branch road (17), the second backheat water branch road (18) and is used for the refrigeration machine (38) of refrigeration, described the 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), and described the second backheat water branch road (18) is connected between the water return outlet and described backwater main line (12) of described refrigeration machine (38).
11. according to claim 9 or 10 described circulating-water in thermal power plant heating systems, 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).
12. circulating-water in thermal power plant heating system according to claim 11 is characterized in that, is serially connected with water supply pump (39) on described refrigeration supply channel (23).
13. circulating-water in thermal power plant heating system according to claim 12, 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).
14. circulating-water in thermal power plant heating system according to claim 10 is characterized in that, described refrigeration machine (38) is serially connected on described cold water pipeline (19).
15. 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 gaging pressure and temperature.
16. circulating-water in thermal power plant heating system according to claim 1 and 2, it is characterized in that, described heating network comprises steam turbine (1) and condenser (2), described steam turbine (1) is connected in the steam ports that enters of described condenser (2) by exhaust equipment of LP casing road (10), 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 in the recirculated water water inlet of described condenser (2).
17. circulating-water in thermal power plant heating system according to claim 16 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).
18. circulating-water in thermal power plant heating system according to claim 17, it is characterized in that, described heater (3) is vapor-water heat exchanger, described steam turbine (1) is connected in described heater (3) by bleed steam pipework (10a), and the steam pressure in described bleed steam pipework (10a) is 0.3～0.8MPa.
19. circulating-water in thermal power plant heating system according to claim 16, 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 in the recirculated water water inlet of described condenser (2) by cooling tower supply channel (81), and is connected in the recirculated water delivery port of described condenser (2) by cooling tower water return pipeline (82).
20. circulating-water in thermal power plant heating system according to claim 16 is characterized in that, described heating network also comprises water replanishing device (4), the other described backwater main line (12) that is connected on of this water replanishing device (4).
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