CN208153076U - The integrated heating system of small steam turbine coupled electricity-generation unit - Google Patents
The integrated heating system of small steam turbine coupled electricity-generation unit Download PDFInfo
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- CN208153076U CN208153076U CN201821272404.6U CN201821272404U CN208153076U CN 208153076 U CN208153076 U CN 208153076U CN 201821272404 U CN201821272404 U CN 201821272404U CN 208153076 U CN208153076 U CN 208153076U
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Abstract
The utility model discloses a kind of integrated heating systems of small steam turbine coupled electricity-generation unit comprising：Small steam turbine, the steam inlet of small steam turbine are connected to the auxiliary vapour header of fired power generating unit；Heat exchangers for district heating, the first heat source import of heat exchangers for district heating and the steam exhaust outlet of small steam turbine, the Secondary Heat Source import of heat exchangers for district heating are connected to the extraction opening of low pressure (LP) cylinder, and the cold source outlet of heat exchangers for district heating is connected to the feed water inlet of heat supply network circulation；And pneumatic pump, the output axis connection of pneumatic pump and small steam turbine under the driving of small steam turbine to rotate, and the entrance of pneumatic pump is connected to the water return outlet of heat supply network circulation, the outlet of pneumatic pump and the cold source inlet communication of heat exchangers for district heating.The utility model realizes the heating of heat supply network recirculated water using low-quality power plant's steam extraction and small steam turbine steam exhaust, has achieved the effect that energy-saving and emission-reduction, environmentally protective.
Description
Technical field
The utility model belongs to thermal power plant's heat supply process field, in particular to a kind of small steam turbine coupled electricity-generation unit integrates
Heating system.
Background technique
With urban construction and economic development, the Heating Load that power plant is undertaken increases year by year.In national energy conservation and emission reduction
Under the encouraging and facilitating of policy, each electricity power enterprise is having the regional unit progress that original is designed as to pure condensate operation for heat condition
Heat supply transformation, implements cogeneration of heat and power, has developed into inexorable trend.
In many heat-supplying modes of thermoelectricity unit, but it is the most universal in a manner of extraction for heat supply.But during steam extraction generallys use
Cylinder pressure steam extraction, steam extraction parameter are often higher than needed for heat supply network, and high-quality energy degradation uses, and heat consumption loss is high, heating load is few, efficiency
It is low.To solve steam pipe network heat supply energy waste serious problems, the solution taken at present is usually to come out from intermediate pressure cylinder
Steam extraction introduce the acting of small steam turbine and drive electrical power generators.Pump work is driven again using the electricity of generation or is directly accessed station-service
Electricity.Although this kind of mode can effectively realize energy cascade utilization, system complex, investment is big, the low-quality vapour source of original machine group
It is underutilized, power plant's cold source energy is big.
Simultaneously because heat supply network Circulating Water Parameters are low, flow is big, electric pump pressurized circulation water, power consumption are dragged using small steam turbine
Greatly.
Utility model content
To solve the above-mentioned problems, the utility model provides a kind of integrated heating system of small steam turbine coupled electricity-generation unit,
It includes：Small steam turbine, the steam inlet of the small steam turbine are connected to the auxiliary vapour header of fired power generating unit；Heat exchangers for district heating, the heat
The steam exhaust outlet of first heat source import of net heater and the small steam turbine, the Secondary Heat Source import of the heat exchangers for district heating
It is connected to the extraction opening of low pressure (LP) cylinder, the cold source outlet of the heat exchangers for district heating is connected to the feed water inlet of heat supply network circulation；With
Pneumatic pump, the output axis connection of the pneumatic pump and the small steam turbine under the driving of the small steam turbine to rotate, the steam-operating
The entrance of pump is connected to the water return outlet of the heat supply network circulation, and exporting for the pneumatic pump is cold with the heat exchangers for district heating
Source inlet communication.
In integrated heating system as described above, it is preferable that the integrated heating system further includes：Dirt separator, it is described
The import of dirt separator is connected to the water return outlet of the heat supply network circulation, the import of the dirt separator through first pipe with it is described
The entrance of pneumatic pump is connected to.
In integrated heating system as described above, it is preferable that the integrated heating system further includes：Feed water installations,
It is connected to the first pipe, for filling into demineralized water into the first pipe.
In integrated heating system as described above, it is preferable that the heat exchangers for district heating is shell-and-tube heating network heater.
In integrated heating system as described above, it is preferable that the thermal source outlet of the heat exchangers for district heating and the thermoelectricity
The inlet communication of the steam condensation water system of unit, the outlet of the steam condensation water system and the low pressure of the fired power generating unit add
Hot device connection.
In integrated heating system as described above, it is preferable that the integrated heating system further includes：Electrodynamic pump；It is described
Electrodynamic pump is arranged in parallel with the pneumatic pump, when the pneumatic pump stops working, the electric priming pump.
Technical solution bring beneficial effect provided by the embodiment of the utility model is：
By the way that two heat source imports are arranged in heat exchangers for district heating, a heat source import receives the steam extraction from low pressure (LP) cylinder,
This kind of mode is the flow for changing low pressure (LP) cylinder, the efficiency of low pressure (LP) cylinder is reduced, to intermediate pressure cylinder and high pressure cylinder operating condition base
This is not influenced, and so that its operating condition is not changed, cold source energy is reduced for steam turbine, reduce heat consumption value, pole
The earth improves the economy of unit；Another heat source import receives the steam exhaust from small steam turbine simultaneously, and passes through small steam turbine
Pneumatic pump is dragged, low parameter, big flow heat supply network recirculated water are provided, realizes that heat supply needs, it is energy saving, energy consumption is reduced, thus logical
It crosses using low-quality power plant's steam extraction and small steam turbine steam exhaust heating municipal heating systems recirculated water, realizes energy-saving and emission-reduction and environmentally protective.
Detailed description of the invention
Fig. 1 is a kind of structure of the integrated heating system of small steam turbine coupled electricity-generation unit provided by the embodiment of the utility model
Schematic diagram；
Wherein, symbol description is as follows in figure：
1 small steam turbine, 2 heat exchangers for district heatings, 3 pneumatic pumps, 4 dirt separators, 5 low pressure (LP) cylinders, 6 auxiliary vapour headers, 7 condensate tanks, 8 condensations
Drainage pump, 9 make-up pumps, 10 extra feed tanks, 11 electrodynamic pumps, 12 low-pressure heaters.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.Each example is provided by way of the explanation of the utility model rather than limits this
Utility model.In fact, those skilled in the art will be clear that, in the situation for not departing from the scope of the utility model or spirit
Under, it can modify in the present invention and modification.For example, the feature for being illustrated or described as a part of one embodiment can
For another embodiment, to generate another embodiment.Thus, it may be desirable to which the utility model includes to be included into appended power
Such modifications and variations in the range of benefit requirement and its equivalent.
In the description of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "top", "bottom" is to be based on the orientation or positional relationship shown in the drawings,
It is merely for convenience of description the utility model rather than requires the utility model that must be constructed and operated in a specific orientation, therefore
It should not be understood as limiting the present invention.Term used in the utility model " connected ", " connection " shall be understood in a broad sense,
For example, it may be being fixedly connected, may be a detachable connection；It can be directly connected, it can also be indirect by intermediate member
It is connected, for the ordinary skill in the art, can understands the concrete meaning of above-mentioned term as the case may be.
Referring to Fig. 1, the utility model embodiment provides a kind of integrated heating system of small steam turbine coupled electricity-generation unit,
Including：Small steam turbine 1, heat exchangers for district heating 2 and pneumatic pump 3.
Small steam turbine 1 is used to receive the vapour source of the auxiliary vapour header 6 from fired power generating unit, converts rotor for the thermal energy of steam
The mechanical energy of rotation is input to heat exchangers for district heating 2 for the steam exhaust after function is finished to drive pneumatic pump 3 to rotate, using as heat supply network
The heat source of heater 2, the steam inlet of small steam turbine 1 are connected to the auxiliary vapour header 6 of fired power generating unit, steam exhaust outlet and heat exchangers for district heating
2 the first heat source import connection, output shaft are connect to drive pneumatic pump 3 to rotate by shaft coupling with pneumatic pump 3.Small steam turbine 1 (or
Small turbine) be referred to as electric turbine in fired power generating unit (or big machine) subsidiary engine equipment, usually by the vapour that generates electricity in fired power generating unit
The intermediate steam of turbine drives, and the two capacity difference is larger, in practical application, when electric turbine capacity is 600MW, and small vapour
The capacity of machine 1 can be 6~20MW, can also be other numerical value, the present embodiment is to electric turbine in others are implemented
Capacity, the capacity of small steam turbine 1 is without limiting.
Heat exchangers for district heating 2 is used to heat hot net water using steam source, has the first heat source import, Secondary Heat Source import
And thermal source outlet.The steam exhaust outlet of first heat source import and small steam turbine 1 is to receive the steam exhaust from small steam turbine 1.Second
Heat source import is connected to receive the steam from low pressure (LP) cylinder 5 with the extraction opening of low pressure (LP) cylinder 5.The steaming entered by the first heat source import
Vapour and the steam entered by Secondary Heat Source import mix in heat exchangers for district heating 2, mixed steam in heat exchangers for district heating 2 with
Cold source exchanges heat, and the heat source after heat exchange becomes condensed water and is discharged by the thermal source outlet of heat exchangers for district heating 2.The steam extraction of low pressure (LP) cylinder 5
The steam extraction of mouth output can be 5 sections of steam extractions, can also be other section of steam extraction, this implementation is to this without limiting.In order to enable low
5 steam extraction of cylinder pressure and the steam exhaust of small steam turbine 1 can mix (or matching), can be selected according to steam extraction parameter small steam turbine 1.
In practical application, steam extraction parameter can be：0.29MPa (G), 220 DEG C~232 DEG C of temperature, the parameter of the steam exhaust of small steam turbine 1 can be with
For 0.29MPa, 275 DEG C of temperature.By using 5 sections of steam extractions and the steam exhaust of small steam turbine 1 can in heat supply network exchanger 2 by cold source by
70 DEG C are heated to 120 DEG C.Preferably, heat exchangers for district heating 2 is shell-and-tube heating network heater 2, so that heat exchangers for district heating 2 has
Conduct heat fast, heat transfer efficient, high heat exchange efficiency the features such as.
Pneumatic pump 3 (or circulation pump of heat-supply network) is used to be delivered in heat exchangers for district heating 2 after the pressurization of heat supply network return water, i.e. vapour
Heat supply network return water is pumped into heat exchangers for district heating 2 by dynamic pump 3 under the dragging of small steam turbine 1.Specifically, the drive shaft of pneumatic pump 3 with it is small
The entrance of the output axis connection of steam turbine 1, pneumatic pump 3 is connected to the water return outlet of heat supply network circulation, the outlet and heat of pneumatic pump 3
The cold source inlet communication of net heater 2, while the cold source outlet of heat exchangers for district heating 2 and the feed water inlet of heat supply network circulation connect
Logical, i.e., the cold source in heat exchangers for district heating 2 is the recirculated water that heat supply network circulation conveys.
Since the low-quality vapour source quantity of steam of power plant is big, but for many years itself and be underutilized, the utility model is real
Example is applied by the extraction for heat supply using low pressure (LP) cylinder 5, this mode is the flow for changing low pressure (LP) cylinder 5, reduces the effect of low pressure (LP) cylinder 5
Rate does not influence the operating condition of intermediate pressure cylinder and high pressure cylinder substantially, cold source energy is reduced for electric turbine, reduces
Heat consumption value, greatly improves the economy of fired power generating unit.Simultaneously by small steam turbine 1 drag pneumatic pump 3, provide low parameter,
Big flow heat supply network recirculated water realizes that heat supply needs, energy saving, reduces energy consumption.
In order to filter out the impurity such as the silt in heat supply network return water, integrated heating system further includes dirt separator 4, import and heat
The water return outlet of net circulation is connected to, and outlet is connected to through first pipe with the entrance of pneumatic pump 3.Dirt separator 4 can be fixation
Dirt separator.
As the long-time of heat supply network circulation uses, there must be water loss in the system, integrate heat supply system thus
System further includes：Water installations are fed, fill into demineralized water for the water return pipeline (or first pipe) into heat supply network circulation,
It is connected to first pipe, and demineralized water enters in pneumatic pump 3 after mixing in first pipe with the water after dirt separator decontaminates.It is real
Supply water installations are opened in application, when additional water is less than leakage water in heat supply network circulation in border.Specifically, it feeds
Water installations include：Extra feed tank 10 and make-up pump 9.Extra feed tank 10 is for receiving demineralized water and storing.Make-up pump 9 is used for
Pressurize demineralized water, and demineralized water is delivered in first pipe, the entrance of make-up pump 9 and the outlet of extra feed tank 10,
Outlet is connected to first pipe.
It is cold in order to form condensed water after promoting recycling for water, steam source to complete heat exchange in heat exchangers for district heating 2
Condensate is delivered to steam condensation water system, carries out storage processing by the system, is then sent to the low-pressure heater of fired power generating unit
12 heating, it is subsequent water after heating to be delivered to fired power generating unit other processes.Specifically, the heat source of heat exchangers for district heating 2 goes out
The inlet communication of mouth and the steam condensation water system of fired power generating unit, the outlet of steam condensation water system and the low pressure of fired power generating unit add
Hot device 12 is connected to.Steam condensation water system includes：Condensate tank 7 and condensation drainage pump 8.Condensate tank 7 adds for storing heat supply network
The condensed water that the heat source of hot device 2 becomes after exchanging heat, condensation drainage pump 8 are used to the condensed water in condensate tank 7 being pumped into low pressure
Heater 12.Specifically, the import of condensate tank 7 is connected to the thermal source outlet of heat exchangers for district heating 2, the outlet of condensate tank 7 with
The inlet communication of drainage pump 8 is condensed, the outlet of drainage pump 8 and the cold source inlet communication of low-pressure heater 12 are condensed.
In order to improve the stability of integrated heating system, integrated heating system further includes electrodynamic pump 11, simultaneously with pneumatic pump 3
Connection setting, as stand-by pump, when pneumatic pump 3 stops working, when if you need to repair, can star electrodynamic pump 11, makes heat supply network return water
It is pumped into heat exchangers for district heating 2 by electrodynamic pump 11.For electrodynamic pump 11 by being driven by electricity, when work, need to consume electric energy.
In conclusion the utility model embodiment bring has the beneficial effect that：
By the way that two heat source imports are arranged in heat exchangers for district heating 2, a heat source import receives the pumping from low pressure (LP) cylinder 5
Vapour, this kind of mode is the flow for changing low pressure (LP) cylinder 5, reduces the efficiency of low pressure (LP) cylinder, runs work to intermediate pressure cylinder and high pressure cylinder
Condition does not influence substantially, so that its operating condition is not changed, cold source energy is reduced for steam turbine, reduce heat consumption
Value, greatly improves the economy of unit；Another heat source import receives the steam exhaust from small steam turbine 1 simultaneously, and passes through
Small steam turbine 1 drags pneumatic pump 3, provides low parameter, big flow heat supply network recirculated water, realizes that heat supply needs, energy saving, reduces energy
Consumption, thus by heating municipal heating systems recirculated water using low-quality power plant's steam extraction and 1 steam exhaust of small steam turbine, realize energy-saving and emission-reduction and
It is environmentally protective.
As known by the technical knowledge, the utility model can pass through other essence without departing from its spirit or the reality of essential feature
Scheme is applied to realize.Therefore, embodiment disclosed above, in all respects are merely illustrative, and are not only
's.All changes that come within the scope of the invention or equivalents of the invention are by the utility model packet
Contain.
Claims (6)
1. a kind of integrated heating system of small steam turbine coupled electricity-generation unit, which is characterized in that the integrated heating system includes：
Small steam turbine, the steam inlet of the small steam turbine are connected to the auxiliary vapour header of fired power generating unit；
Heat exchangers for district heating, the steam exhaust outlet of the first heat source import of the heat exchangers for district heating and the small steam turbine, the heat
The Secondary Heat Source import of net heater is connected to the extraction opening of low pressure (LP) cylinder, and cold source outlet and the heat supply network of the heat exchangers for district heating recycle
The feed water inlet of water system is connected to；With
Pneumatic pump, the output axis connection of the pneumatic pump and the small steam turbine are described to rotate under the driving of the small steam turbine
The entrance of pneumatic pump is connected to the water return outlet of the heat supply network circulation, the outlet of the pneumatic pump and the heat exchangers for district heating
Cold source inlet communication.
2. integrated heating system according to claim 1, which is characterized in that the integrated heating system further includes：Decontamination
Device, the import of the dirt separator are connected to the water return outlet of the heat supply network circulation, and the import of the dirt separator is through the first pipe
Road is connected to the entrance of the pneumatic pump.
3. integrated heating system according to claim 2, which is characterized in that the integrated heating system further includes：Supply
Water installations are connected to the first pipe, for filling into demineralized water into the first pipe.
4. integrated heating system according to claim 1, which is characterized in that the heat exchangers for district heating is that shell-and-tube heat supply network adds
Hot device.
5. integrated heating system according to claim 1, which is characterized in that the thermal source outlet of the heat exchangers for district heating and institute
State the inlet communication of the steam condensation water system of fired power generating unit, outlet and the fired power generating unit of the steam condensation water system
Low-pressure heater connection.
6. integrated heating system according to claim 1, which is characterized in that the integrated heating system further includes：It is electronic
Pump；The electrodynamic pump is arranged in parallel with the pneumatic pump, when the pneumatic pump stops working, the electric priming pump.
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| CN201821272404.6U CN208153076U (en) | 2018-08-08 | 2018-08-08 | The integrated heating system of small steam turbine coupled electricity-generation unit |
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| CN201821272404.6U CN208153076U (en) | 2018-08-08 | 2018-08-08 | The integrated heating system of small steam turbine coupled electricity-generation unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798809A (en) * | 2018-08-08 | 2018-11-13 | 国电龙源电力技术工程有限责任公司 | The integrated heating system of small steam turbine coupled electricity-generation unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798809A (en) * | 2018-08-08 | 2018-11-13 | 国电龙源电力技术工程有限责任公司 | The integrated heating system of small steam turbine coupled electricity-generation unit |
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