CN203796339U - Waste heat recovery device of direct air cooling unit - Google Patents

Waste heat recovery device of direct air cooling unit Download PDF

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Publication number
CN203796339U
CN203796339U CN201320732177.1U CN201320732177U CN203796339U CN 203796339 U CN203796339 U CN 203796339U CN 201320732177 U CN201320732177 U CN 201320732177U CN 203796339 U CN203796339 U CN 203796339U
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China
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air
heater
steam
wind
outlet
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CN201320732177.1U
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Chinese (zh)
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舒少辛
武智
顾人维
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舒少辛
武智
顾人维
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model relates to a waste heat recovery device of a direct air cooling unit. Dead steam of a steam turbine of a direct air cooling power unit is used as a heat source, heaters are used for heating primary air and secondary air of furnace equipment, and the primary air heater and the secondary air heater are separately arranged in a primary air flue and a secondary air flue. Spiral fin tubes or H-shaped fin tubes or steel-aluminum composite fin tubes or other fin tubes or light tubes can be used as heat exchanging elements of the heaters. Steam flows in the tubes and the primary air and the secondary air flow outside the tubes to realize heat exchanging. The waste heat recovery device of the direct air cooling unit is stable in operation, safe and environmentally friendly and has a good energy-saving effect.

Description

A kind of Direct Air-cooled Unit waste heat recovering device
Technical field
The utility model belongs to power environment protection field, particularly relates to a kind of Direct Air-cooled Unit waste heat recovering device.
Background technique
The operation of modern large-size thermal power plant need to consume water resources, just need to adopt the new type of cooling to get rid of waste heat and build jumbo thermal power plant in water-deficient area.Adopting the thermal power generating technology of Air-cooled Unit is a kind of water-saving thermal power generating technology, is widely applied in water scarcity the Northwest of China at present.
Air cooling technique is divided into direct air cooling and indirect air cooling, direct air cooling is to utilize mechanical ventilation that turbine discharge is directly condensed in fin tube type air cooling condenser (Air-Cooling Island), is generally made up of Large Diameter Pipeline blow-off line, air cooling condenser, axial flow cooling blower and condensate pump etc.
In Direct Air-cooled Unit, generally enter the temperature of exhaust steam in steam turbine (saturated vapour) of Air-Cooling Island higher than 35 DEG C of left and right of ambient temperature, cooling by air in Air-Cooling Island, condense into condensed water after discharging a large amount of heats, the heat regenerative system that condensed water is sent back to Direct Air-cooled Unit recycles.
In addition, in large-scale coal-fired electric generation furnace, wind, secondary air system all can be set conventionally.A wind is mainly for delivery of fuel, and Secondary Air is mainly used in combustion-supporting.One time wind, Secondary Air are taken from ambient air, need through carrying out preheating in the air preheater in boiler before utilization.
As can be seen here, in existing Direct Air-cooled Unit, existing on the one hand exhaust steam in steam turbine need to be cooling by air, and the wind, the Secondary Air that exist again on the other hand boiler need to will be taken from the air preheat of environment.In view of this, for many years research of the design people based on to Air-cooled Unit, on the basis of abundant practical experience and professional knowledge, actively research and innovation in addition, creates a kind of new technology of Direct Air-cooled Unit heat recovery.
Summary of the invention
The purpose of this utility model is, a kind of new Direct Air-cooled Unit waste heat recovering device is proposed, technical problem to be solved is to make it need the waste heat of cooling exhaust steam in steam turbine to be used for adding heat primary air and Secondary Air Direct Air-cooled Unit, to reduce wind, the caloric receptivity of Secondary Air in boiler, thereby reach energy-conservation object.
The purpose of this utility model and solve its technical problem and realize by the following technical solutions.According to a kind of Direct Air-cooled Unit waste heat recovering device that the utility model proposes, it is characterized in that it comprises: wind heater, Secondary Air heater, wind heater condensate water tank, Secondary Air heater condensate water tank, drainage pump, steam line and a condensing water conduit; Wherein, a described wind heater is arranged in a wind air channel; The water of condensation outlet of a described wind heater is connected with the entrance of a described wind heater condensate water tank; Described Secondary Air heater is arranged in Secondary Air air channel; The water of condensation outlet of described Secondary Air heater is connected with the entrance of described Secondary Air heater condensate water tank; Lead on the exhaust steam pipeline of Air-Cooling Island and be provided with and get steam ports at the steam turbine of described Direct Air-cooled Unit; On the condensing water conduit being connected with heat regenerative system at the Air-Cooling Island of described Direct Air-cooled Unit, be provided with backwater mouth; A described wind heater and a described wind heater condensate water tank and described Secondary Air heater and described Secondary Air heater condensate water tank are got between steam ports and described backwater mouth described in being parallel to by described steam line and described condensing water conduit; Described drainage pump is arranged on described condensing water conduit.
The purpose of this utility model and solve its technical problem and also can be applied to the following technical measures to achieve further.
Aforesaid Direct Air-cooled Unit waste heat recovering device, is wherein provided with system steam inlet valve described getting on the described steam line that steam ports is connected with the steam inlet of a described wind heater and the steam inlet of described Secondary Air heater; On the described condensing water conduit being connected with the outlet of a described wind heater condensate water tank and the outlet of described Secondary Air heater condensate water tank at described backwater mouth, be provided with system outlet valve; Wherein between the above drainage pump of described condensing water conduit and described system outlet valve, be also provided with dewatering outlet, in described dewatering outlet, place is provided with discharging valve.
Aforesaid Direct Air-cooled Unit waste heat recovering device, the steam inlet of a wherein said wind heater is to be connected to same described system steam inlet valve by same described steam line after being connected by described steam line with the steam inlet of described Secondary Air heater, then gets steam ports described in being connected to by described system steam inlet valve; The outlet of a described wind heater condensate water tank is to be connected to same described system outlet valve by same described condensing water conduit after being connected by described condensing water conduit with the outlet of described Secondary Air heater condensate water tank, then is connected to described backwater mouth by described system outlet valve; The outlet that described drainage pump and described dewatering outlet are arranged at a described wind heater condensate water tank is connected with the outlet of described Secondary Air heater condensate water tank on the rear described condensing water conduit being connected with described system outlet valve.
Aforesaid Direct Air-cooled Unit waste heat recovering device, wherein in the described steam line that the steam inlet of a described wind heater is connected with the steam inlet of described Secondary Air heater, on the described steam line being connected with the steam inlet of a described wind heater, be provided with wind heater admission modulating valve one time, on the described steam line being connected with the steam inlet of described Secondary Air heater, be provided with Secondary Air heater admission modulating valve.
Aforesaid Direct Air-cooled Unit waste heat recovering device, is wherein provided with wind heater admission modulating valve one time described getting on the described steam line that steam ports is connected with the steam inlet of a described wind heater; Be provided with Secondary Air heater admission modulating valve described getting on the described steam line that steam ports is connected with the steam inlet of described Secondary Air heater.
Aforesaid Direct Air-cooled Unit waste heat recovering device, the heating surface of a wherein said wind heater and described Secondary Air heater adopts fin tube or the light pipe of spiral fin coil, H type extended surface tube, steel-aluminum composite fin tube, other form.
The utility model compared with prior art has obvious advantage and beneficial effect.By technique scheme, a kind of Direct Air-cooled Unit waste heat recovering device of the utility model at least has following advantages and beneficial effect:
One, Direct Air-cooled Unit waste heat recovering device of the present utility model can improve the entering air temp of wind of boiler, Secondary Air, reduces the coal consumption of unit, improves the Economy of power plant, reduces the discharge of polluting simultaneously.
Two, Direct Air-cooled Unit waste heat recovering device of the present utility model can reduce the steam flow of air cooling island of direct air cooling unit, thereby reduces the investment of Air-Cooling Island; And if the investment that maintains Air-Cooling Island is constant, can strengthen air cooling heat transfer effect, reduce turbine back pressure, improve the Economy of unit.
Three, Direct Air-cooled Unit waste heat recovering device of the present utility model is simple in structure, operates steadily, safety.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of specification, and for above and other object of the present utility model, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Brief description of the drawings
Fig. 1 is the schematic diagram of a preferred embodiment of a kind of Direct Air-cooled Unit waste heat recovering device that the utility model proposes.
1: wind heater 2: Secondary Air heater
3: wind heater admission modulating valve 4: Secondary Air heater admission modulating valve
5: wind heater condensate water tanks 6: Secondary Air heater condensate water tank
7: drainage pump 8: system steam inlet valve
9: system outlet valve 10: steam line
11: condensing water conduit 12: discharging valve
13: steam turbine 14: Air-Cooling Island
15: condensate pump 16: air preheater
17: boiler 18: low-pressure heater
19: oxygen-eliminating device 20: feed water pump
21: high-pressure heater 22: primary air fan
23: overfire air fan 24: exhaust steam pipeline
25: condensing water conduit
Embodiment
Technological means and effect of taking for reaching predetermined goal of the invention for further setting forth the utility model, below in conjunction with accompanying drawing and preferred embodiment, to a kind of its embodiment of Direct Air-cooled Unit waste heat recovering device, structure, step, feature and effect thereof according to the utility model proposes, be described in detail as follows.
Relevant aforementioned and other technology contents of the present utility model, Characteristic can be known and present in the following detailed description coordinating with reference to graphic preferred embodiment.By the explanation of embodiment, should obtain one more deeply and concrete understanding for technological means and effect of reaching predetermined object and taking to the utility model, but appended graphic be only to provide with reference to the use of explanation, be not used for the utility model to be limited.
Referring to shown in Fig. 1, is the schematic diagram of a preferred embodiment of a kind of Direct Air-cooled Unit waste heat recovering device that the utility model proposes.
Direct Air-cooled Unit waste heat recovering device of the present utility model is mainly made up of wind heater 1, Secondary Air heater 2, wind heater condensate water tank 5, Secondary Air heater condensate water tank 6, drainage pump 7, steam line 10 and a condensing water conduit 11.Wherein, a described wind heater 1 is arranged in a wind air channel, and the water of condensation outlet of a wind heater 1 is connected with the entrance of a wind heater condensate water tank 5.Secondary Air heater 2 is arranged in Secondary Air air channel, and the water of condensation outlet of Secondary Air heater 2 is connected with the entrance of Secondary Air heater condensate water tank 6.Lead on the exhaust steam pipeline 24 of Air-Cooling Island 14 and be provided with and get steam ports at the steam turbine 13 of Direct Air-cooled Unit, on the condensing water conduit 25 being connected with heat regenerative system at the Air-Cooling Island 14 of Direct Air-cooled Unit, be provided with backwater mouth.Wind heater 1 and wind heater condensate water tank 5 and Secondary Air heater 2 and Secondary Air heater condensate water tank 6 are parallel to and are got between steam ports and backwater mouth by steam line 10 and condensing water conduit 11.Drainage pump 7 is arranged on condensing water conduit 11.
The exhaust steam that Direct Air-cooled Unit steam turbine 13 produces is admitted to Air-Cooling Island 14 by exhaust steam pipeline 24, cooling by air in Air-Cooling Island 14, after discharging a large amount of heats, condense into condensed water, condensed water is sent back to the heat regenerative system of Direct Air-cooled Unit by condensing water conduit 25, recycle.Direct Air-cooled Unit waste heat recovering device of the present utility model be the exhaust steam pipeline 24 that is connected to Direct Air-cooled Unit with condensing water conduit 25 on a UTILIZATION OF VESIDUAL HEAT IN branch road, it introduces wind heater 1 and Secondary Air heater 2 by getting exhaust steam that steam ports produces steam turbine 13 by steam line 10, add mobile air in heat primary air air channel and Secondary Air air channel as hot side working medium, the temperature of wind and Secondary Air is improved.Simultaneously, steam is cooling by wind and Secondary Air in wind heater 1 and Secondary Air heater 2, produce water of condensation, export and enter wind heater condensate water tank 5 and Secondary Air heater condensate water tank 6 by the water of condensation outlet of a wind heater 1 and the water of condensation of Secondary Air heater 2, then under the effect of drainage pump 7, be sent back to condensing water conduit 25 by condensing water conduit 11 by backwater mouth, recycle.
The utility model is to utilize Direct Air-cooled Unit to need the waste heat of cooling exhaust steam in steam turbine to heat to need a time of preheating wind and Secondary Air, and wind and Secondary Air temperature after heated are improved, and subsequently again by air preheater 16, continues degree of depth heating.Owing to entering wind of air preheater 16 and the temperature of Secondary Air improves, therefore than the wind and the Secondary Air that do not improve temperature and enter air preheater 16, when reach equal design temperature in air preheater 16 time, use the needed heat of air preheater 16 of the present utility model to reduce, thereby can reduce the caloric receptivity of boiler 17, fuel saving, produces economic benefit.
Meanwhile, the exhaust steam in steam turbine that enters Direct Air-cooled Unit waste heat recovering device of the present utility model can be cooled in wind heater 1 and Secondary Air heater 2, produces water of condensation, and is sent back to the condensing water conduit 25 of Direct Air-cooled Unit again, recycles.Therefore, keeping under the condition of the return water temperature that Air-Cooling Island 14 is identical, the utility model can reduce the heat exchange amount of Air-Cooling Island 14, thereby makes Direct Air-cooled Unit use the heating surface that can suitably reduce Air-Cooling Island 14 after the utility model, the investment of saving Air-Cooling Island.
Wind heater 1 and the Secondary Air heater 2 of Direct Air-cooled Unit waste heat recovering device of the present utility model are a kind of condensing steam-air heat exchangers, its heating surface can adopt the heat exchanging tube such as fin tube or light pipe of spiral fin coil, H type extended surface tube, steel-aluminum composite fin tube, other form, steam is flowed in heat exchanging tube, and air flows outward at heat exchanging tube.In the time that wind heater 1 and Secondary Air heater 2 adopt the heat exchanging tube of outer watchband extended surface of fin tube or other form, can strengthen air-side heat exchanger, make the compact structure of heater.Under normal conditions, the steam in heat exchanging tube can be higher than 35 DEG C of left and right of external air temperature, and steam is delivered to the air outside heat exchanging tube by heating surface by heat, and wind and Secondary Air are heated thus, and temperature raises.Meanwhile, the steam in heat exchanging tube is cooling by air, produces water of condensation.This water of condensation is sent back to the condensing water conduit 25 of Direct Air-cooled Unit again through condensing water conduit 11.
The water of condensation of what Direct Air-cooled Unit waste heat recovering device of the present utility model was arranged at that drainage pump 7 on condensing water conduit 11 provides that enough power produces wind heater 1 and Secondary Air heater 2 enter wind heater condensate water tank 5 and Secondary Air heater condensate water tank 6 is sent the condensing water conduit 25 of Direct Air-cooled Unit back to.When in the case of different unit loads, the air quantity of wind and Secondary Air can change, drainage pump 7 of the present utility model adopts VFC, can carry out flow control according to the water level of wind heater condensate water tank 5 and Secondary Air heater condensate water tank 6, to adapt to different load variations.
Direct Air-cooled Unit waste heat recovering device of the present utility model can be provided with system steam inlet valve 8 getting on the described steam line 10 that steam ports is connected with the steam inlet of a wind heater 1 and the steam inlet of Secondary Air heater 2, on the condensing water conduit 11 being connected, can be provided with system outlet valve 9 at backwater mouth with the outlet of a wind heater condensate water tank 5 and the outlet of Secondary Air heater condensate water tank 6.Wherein on condensing water conduit 11, between drainage pump 7 and system outlet valve 9, be also provided with dewatering outlet, be provided with discharging valve 12 at dewatering outlet place.Direct Air-cooled Unit waste heat recovering device of the present utility model is by arranging system steam inlet valve 8 and system outlet valve 9, makes the whole device can be out of service at any time.In the time of accident conditions, can be by being connected between system steam inlet valve 8 and system outlet valve 9 shut-off meanss and Direct Air-cooled Unit, open again discharging valve 12 water of condensation in device is got rid of, can make device out of service rapidly, thereby ensure the safe operation of whole Direct Air-cooled Unit.
Because the flow of a wind and the flow of Secondary Air differ larger conventionally, therefore need the steam flow to entering wind heater 1 and Secondary Air heater 2 to regulate and distribute, the steam flow that makes to enter wind heater 1 and Secondary Air heater 2 mates with the air quantity of wind and Secondary Air.Direct Air-cooled Unit waste heat recovering device of the present utility model can be by arranging wind heater admission modulating valve 3 one time getting on the steam line 10 that steam ports is connected with the steam inlet of a wind heater 1, Secondary Air heater admission modulating valve 4 is set getting on the steam line 10 that steam ports is connected with the steam inlet of Secondary Air heater 2, wind heater 1 and Secondary Air heater 2 are front first carries out regulating and distributing of steam flow by wind heater admission modulating valve 3 and Secondary Air heater admission modulating valve 4 entering to make steam, thereby the steam flow that makes to enter wind heater 1 and Secondary Air heater 2 mates with the air quantity of wind and Secondary Air.
In the utility model one preferred embodiment, as shown in Figure 1, the steam inlet of a wind heater 1 of Direct Air-cooled Unit waste heat recovering device of the present utility model is to be connected to same system steam inlet valve 8 by same steam line 10 after being connected by steam line 10 with the steam inlet of Secondary Air heater 2, then is connected to and is got steam ports by system steam inlet valve 8.The outlet of a wind heater condensate water tank 5 of Direct Air-cooled Unit waste heat recovering device of the present utility model is to be connected to same system outlet valve 9 by same condensing water conduit 11 after being connected by condensing water conduit 11 with the outlet of Secondary Air heater condensate water tank 6, then is connected to backwater mouth by system outlet valve 9.On the condensing water conduit 11 being connected with system outlet valve 9 after the outlet that wherein drainage pump 7 and dewatering outlet are arranged at a wind heater condensate water tank 5 is connected with the outlet of Secondary Air heater condensate water tank 6.Wherein, in this preferred embodiment, in the steam line 10 that the steam inlet of a wind heater 1 is connected with the steam inlet of Secondary Air heater 2, on the steam line 10 being connected with the steam inlet of a wind heater 1, be provided with wind heater admission modulating valve 3 one time, on the steam line 10 being connected with the steam inlet of Secondary Air heater 2, be provided with Secondary Air heater admission modulating valve 4.
The Direct Air-cooled Unit waste heat recovering device of this preferred embodiment is in the time of normal work, system steam inlet valve 8 and system outlet valve 9 are opened, the exhaust steam of the steam turbine of Direct Air-cooled Unit enters steam line 10 by getting steam ports, be sent to the wind heater 1 and the Secondary Air heater 2 that in air channel of boiler 17 and secondary flue, arrange, add heat primary air and Secondary Air.Simultaneously, steam is cooling by wind and Secondary Air in wind heater 1 and Secondary Air heater 2, produce water of condensation, enter wind heater condensate water tank 5 and Secondary Air heater condensate water tank 6 by wind heater 1 and Secondary Air heater 2, and under the promotion of drainage pump 7, enter condensing water conduit 11, be sent back to condensing water conduit 25 by backwater mouth, recycle.Wherein, wind heater water side modulating valve 3 and Secondary Air heater water side modulating valve 4 that the utility model can arrange by the water side entrance place of wind heater 1 and Secondary Air heater 2 regulate vapor volume, thereby control the temperature rise of wind and Secondary Air, and control the amount of water of condensation simultaneously.
Certainly, the utility model is not as limit, for example: in another embodiment of the present utility model, wind heater 1 and the Secondary Air heater 2 of Direct Air-cooled Unit waste heat recovering device of the present utility model also can be parallel to and be got between steam ports and backwater mouth by different steam line 10 and condensing water conduit 11 respectively, in Direct Air-cooled Unit waste heat recovering device of the present utility model, make wind heater 1 and wind heater condensate water tank 5 and get steam line 10 that steam ports and backwater mouth be connected and condensing water conduit 11 and make Secondary Air heater 2 and Secondary Air heater condensate water tank 6 and to get steam line 10 and condensing water conduit 11 that steam ports and backwater mouth be connected separate, but both share same steam ports and the backwater mouth got.Now, the water of condensation outlet of a wind heater 1 is connected with the entrance of a wind heater condensate water tank 5, the steam inlet that makes a wind heater 1 with get the steam line 10 that steam ports is connected and can be provided with a system steam inlet valve 8 and a wind heater admission modulating valve 3, can be provided with a system outlet valve 7, a dewatering outlet and a drainage pump 7 at the condensing water conduit 11 that the outlet of a wind heater condensate water tank 5 is connected with backwater mouth.And the outlet of the water of condensation of Secondary Air heater 2 is connected with the entrance of Secondary Air heater condensate water tank 6, the steam inlet that makes Secondary Air heater 2 with get the steam line 10 that steam ports is connected and can be provided with another system steam inlet valve 8 and Secondary Air heater admission modulating valve 4, can be provided with another system outlet valve 7, another dewatering outlet and another drainage pump 7 at the condensing water conduit 11 that the outlet of Secondary Air heater condensate water tank 6 is connected with backwater mouth.Again for example: in another embodiment of the present utility model, although a wind heater 1 and a wind heater condensate water tank 5 of Direct Air-cooled Unit waste heat recovering device of the present utility model are to be also parallel to and to be got between steam ports and backwater mouth by different steam line 10 and condensing water conduit 11 respectively from Secondary Air heater 2 and Secondary Air heater condensate water tank 6, in Direct Air-cooled Unit waste heat recovering device of the present utility model, make wind heater 1 and wind heater condensate water tank 5 and get steam line 10 that steam ports and backwater mouth be connected and condensing water conduit 11 and make Secondary Air heater 2 and Secondary Air heater condensate water tank 6 and to get steam line 10 and condensing water conduit 11 that steam ports and backwater mouth be connected separate, but both are connected with exhaust steam pipeline 24 and condensing water conduit 25 with backwater mouth by the different steam ports of getting respectively, on the condensing water conduit 25 of Air-Cooling Island 14 and heat regenerative system, be respectively equipped with two and get steam ports and two backwater mouths connecting the steam turbine 13 of Direct Air-cooled Unit and the exhaust steam pipeline of Air-Cooling Island 14 24 and be connected.Now, the water of condensation outlet of a wind heater 1 is connected with the entrance of a wind heater condensate water tank 5, the steam inlet that makes a wind heater 1 with get the steam line 10 that steam ports is connected and can be provided with a system steam inlet valve 8 and a wind heater admission modulating valve 3, can be provided with a system outlet valve 7, a dewatering outlet and a drainage pump 7 at the condensing water conduit 11 that the outlet of a wind heater condensate water tank 5 is connected with backwater mouth.And the outlet of the water of condensation of Secondary Air heater 2 is connected with the entrance of Secondary Air heater condensate water tank 6, the steam inlet that makes Secondary Air heater 2 with get the steam line 10 that steam ports is connected and can be provided with another system steam inlet valve 8 and Secondary Air heater admission modulating valve 4, can be provided with another system outlet valve 7, another dewatering outlet and another drainage pump 7 at the condensing water conduit 11 that the outlet of Secondary Air heater condensate water tank 6 is connected with backwater mouth.
Thermal technology's measuring point of Direct Air-cooled Unit waste heat recovering device of the present utility model, as: thermal resistor, pressure transmitter, differential pressure transmitter, flowmeter, humidity detector etc., comprise all DCS of accessible generator set of supporting regulating equipment, realize automation control.
The utility model relates to a kind of Direct Air-cooled Unit waste heat recovering device, to utilize the air cooling circulating water of closed-type circulating cooling water system of direct air cooling generator set as thermal source, by wind and the Secondary Air of heater heating boiler, and in wind air channel and Secondary Air air channel, point be arranged wind heater and Secondary Air heater.Wherein the heat-exchanging element of heater can adopt fin tube or the light pipe of spiral fin coil, H type extended surface tube, steel-aluminum composite fin tube, other form, and air cooling circulating water flows in pipe, and wind and Secondary Air are mobile outside pipe, realize heat exchange.Direct Air-cooled Unit waste heat recovering device of the present utility model operates steadily, safety, environmental protection, has good energy-saving effect.
Thermal technology's measuring point of Direct Air-cooled Unit waste heat recovering device of the present utility model, as: thermal resistor, pressure transmitter, differential pressure transmitter, flowmeter, humidity detector etc., comprise all DCS of accessible generator set of supporting regulating equipment, realize automation control.
The utility model relates to a kind of Direct Air-cooled Unit waste heat recovering device, to utilize the exhaust steam in steam turbine of direct air cooling generator set as thermal source, wind by heater heating boiler equipment and Secondary Air and in wind air channel and Secondary Air air channel, point be arranged wind heater and Secondary Air heater.The heat-exchanging element of heater can adopt fin tube or the light pipe of spiral fin coil, H type extended surface tube, steel-aluminum composite fin tube, other form, and steam flows in pipe, and wind and Secondary Air are mobile outside pipe, realize heat exchange.Direct Air-cooled Unit waste heat recovering device of the present utility model operates steadily, safety, environmental protection, has good energy-saving effect.
The above, it is only preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, although the utility model discloses as above with preferred embodiment, but not in order to limit the utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, when can utilizing the method for above-mentioned announcement and technology contents to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solutions of the utility model, any simple modification of above embodiment being done according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.

Claims (6)

1. a Direct Air-cooled Unit waste heat recovering device, is characterized in that it comprises: a wind heater (1), Secondary Air heater (2), a wind heater condensate water tank (5), Secondary Air heater condensate water tank (6), drainage pump (7), steam line (10) and condensing water conduit (11); Wherein, a described wind heater (1) is arranged in a wind air channel; The water of condensation outlet of a described wind heater (1) is connected with the entrance of a described wind heater condensate water tank (5); Described Secondary Air heater (2) is arranged in Secondary Air air channel; The water of condensation outlet of described Secondary Air heater (2) is connected with the entrance of described Secondary Air heater condensate water tank (6); Lead on the exhaust steam pipeline of Air-Cooling Island and be provided with and get steam ports at the steam turbine of described Direct Air-cooled Unit; On the condensing water conduit being connected with heat regenerative system at the Air-Cooling Island of described Direct Air-cooled Unit, be provided with backwater mouth; A described wind heater (1) and a described wind heater condensate water tank (5) and described Secondary Air heater (2) and described Secondary Air heater condensate water tank (6) are got between steam ports and described backwater mouth described in being parallel to by described steam line (10) and described condensing water conduit (11); Described drainage pump (7) is arranged on described condensing water conduit (11).
2. Direct Air-cooled Unit waste heat recovering device according to claim 1, is characterized in that being wherein provided with system steam inlet valve (8) described getting on the described steam line (10) that steam ports is connected with the steam inlet of a described wind heater (1) and the steam inlet of described Secondary Air heater (2); On the described condensing water conduit (11) being connected with the outlet of a described wind heater condensate water tank (5) and the outlet of described Secondary Air heater condensate water tank (6) at described backwater mouth, be provided with system outlet valve (9); Wherein between the above drainage pump of described condensing water conduit (11) (7) and described system outlet valve (9), be also provided with dewatering outlet, be provided with discharging valve (12) at described dewatering outlet place.
3. Direct Air-cooled Unit waste heat recovering device according to claim 2, the steam inlet that it is characterized in that a wherein said wind heater (1) is to be connected to same described system steam inlet valve (8) by same described steam line (10) after being connected by described steam line (10) with the steam inlet of described Secondary Air heater (2), then gets steam ports described in being connected to by described system steam inlet valve (8); The outlet of a described wind heater condensate water tank (5) is to be connected to same described system outlet valve (9) by same described condensing water conduit (11) after being connected by described condensing water conduit (11) with the outlet of described Secondary Air heater condensate water tank (6), then is connected to described backwater mouth by described system outlet valve (9); The outlet that described drainage pump (7) and described dewatering outlet are arranged at a described wind heater condensate water tank (5) is connected with the outlet of described Secondary Air heater condensate water tank (6) on the rear described condensing water conduit (11) being connected with described system outlet valve (9).
4. Direct Air-cooled Unit waste heat recovering device according to claim 3, it is characterized in that wherein in the described steam line (10) that the steam inlet of a described wind heater (1) is connected with the steam inlet of described Secondary Air heater (2), on the described steam line (10) being connected with the steam inlet of a described wind heater (1), be provided with a wind heater admission modulating valve (3), on the described steam line (10) being connected with the steam inlet of described Secondary Air heater (2), be provided with Secondary Air heater admission modulating valve (4).
5. Direct Air-cooled Unit waste heat recovering device according to claim 1 and 2, is characterized in that being wherein provided with a wind heater admission modulating valve (3) described getting on the described steam line (10) that steam ports is connected with the steam inlet of a described wind heater (1); Be provided with Secondary Air heater admission modulating valve (4) described getting on the described steam line (10) that steam ports is connected with the steam inlet of described Secondary Air heater (2).
6. Direct Air-cooled Unit waste heat recovering device according to claim 1, is characterized in that the heating surface of a wherein said wind heater (1) and described Secondary Air heater (2) adopts fin tube or the light pipe of spiral fin coil, H type extended surface tube, steel-aluminum composite fin tube, other form.
CN201320732177.1U 2013-11-18 2013-11-18 Waste heat recovery device of direct air cooling unit Withdrawn - After Issue CN203796339U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104653242A (en) * 2013-11-18 2015-05-27 舒少辛 Waste heat recovery device for direct air-cooling unit
CN110986077A (en) * 2019-12-26 2020-04-10 润电能源科学技术有限公司 Coal-fired unit heat utilizes system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104653242A (en) * 2013-11-18 2015-05-27 舒少辛 Waste heat recovery device for direct air-cooling unit
CN104653242B (en) * 2013-11-18 2016-08-24 舒少辛 A kind of Direct Air-cooled Unit waste-heat recovery device
CN110986077A (en) * 2019-12-26 2020-04-10 润电能源科学技术有限公司 Coal-fired unit heat utilizes system

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