CN207196593U - It is a kind of based on the high pressure combining heating system for taking out back of the body machine technology - Google Patents
It is a kind of based on the high pressure combining heating system for taking out back of the body machine technology Download PDFInfo
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- CN207196593U CN207196593U CN201721201247.5U CN201721201247U CN207196593U CN 207196593 U CN207196593 U CN 207196593U CN 201721201247 U CN201721201247 U CN 201721201247U CN 207196593 U CN207196593 U CN 207196593U
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Abstract
The utility model discloses a kind of based on taking out the high pressure combining heating system of back of the body machine technology, including take out back of the body machine system, standby high pressure heating system, middle pressure heating steam system, standby middle pressure heating system and vapour vapour heat exchanger system.First, the utility model high pressure combining heating system realizes the recovery to heating steam acting ability, while realizes the middle cascade utilization for pressing heating steam energy to heat supply energy redistribution by vapour vapour heat exchanger system；Secondly, based on the heat supply scheme of the utility model high pressure combining heating system, for contrasting main vapour extraction for heat supply scheme, divide production to become cogeneration of heat and power former thermoelectricity by taking out back of the body machine, improve the efficiency of using energy source；Again, the utility model high pressure combining heating system flexibly, easily meets the needs of heat supply variable working condition by heat supply main road and the cooperation of bypass.Therefore, the utility model high pressure combining heating system both improves efficiency of energy utilization, improves the reliability of heat supply again.
Description
Technical field
It the utility model is related to heating field, and in particular to Large-scale fire-electricity unit provides high and medium voltage heat supply system simultaneously
System, it is proposed that a kind of based on the high pressure combining heating system for taking out back of the body machine technology.
Background technology
Because industrial production needs, Some Enterprises also increasingly increase in addition to electrical load requirement increase to thermal load demands
It is long.Heat demand is different according to technological requirement, high pressure, middle pressure and low pressure heat supply, high pressure heat supply be present：4.0MPa grades, 400 DEG C
More than, typically from power plant, superheater outlet draws gas；Middle pressure heat supply：1.0~2.5MPa, 300~400 DEG C, typically taken out from power plant one,
It is cold again or heat again section draw gas；Low pressure heat supply：0.3~0.6MPa, less than 350 DEG C, typically drawn gas from power plant's mesolow communicating pipe.
In pure condensate unit heat supply transformation process, because the through-flow design and manufacture of unit have been molded, the expansion of its steam acting
Line has also determined that therefore, each exhaust point extraction pressure is one group of related parameter to temperature；And industrial heating demand temperature and
Pressure is different with production technology, and pressure and temperature is discrete, and correlation is weaker；Therefore unit is there is to draw gas point pressure and temperature
Degree can not meet process requirements steam quality simultaneously, and in order to meet heat user demand, typically using pressure or temperature grade more
High exhaust point draws gas, then carries out heat supply user use after pressure and temperature reducing, and this has resulted in the unmatched wasting phenomenon of energy level.
In view of the foregoing, the present invention proposes a kind of based on the high pressure combining heating system for taking out back of the body machine technology, utilizes
The acting ability of back of the body machine recovery heating steam is taken out, the acting loss of heat supply is reduced, presses the heat that heat supply is drawn gas in recycling, improve
The temperature of heating steam, the spray desuperheating loss of heat supply is pressed in reduction, realize the cascade utilization of the energy.
The content of the invention
The utility model purpose is taken out in a kind of based on high, the middle pressure combining heating system for taking out back of the body machine technology, recovery heat supply
The acting loss of vapour and desuperheat loss, by being redistributed to heating system energy, realize the cascade utilization of energy, improve energy
Source utilization ratio.
Above-mentioned purpose of the present utility model is achieved by following technical scheme：
It is a kind of based on the high pressure combining heating system for taking out back of the body machine technology, including including take out back of the body machine system, standby high pressure supply
Hot systems, middle pressure heating steam system, standby middle pressure heating system and vapour vapour heat exchanger system；
The back of the body machine system of taking out includes：Take out the back of the body unit (CBJ), extraction for heat supply pipeline (GL6), steam discharge heat supplying pipeline (GL5),
Steam discharge heat supply stop valve (7), take out back of the body machine and draw gas to vapour vapour recuperator bypass stop valve (1), take out back of the body machine and draw gas to vapour vapour heat exchanger
Inlet shutoff valve (3), take out back of the body machine draw gas to vapour vapour heat exchanger exit stop valve (4), take out back of the body machine draw gas to vapour vapour exchange heat bypass
(GL2), high pressure heat supply header；
The standby high pressure heating system includes：Standby high pressure heating system pipeline (GL1), standby high pressure heating system are adjusted
Save valve (T1), standby high pressure heat supply temperature-decreased pressure reducer (JJ1), standby high pressure heat supply stop valve (2)；
Medium pressure heating steam system includes：It is middle pressure heat supplying pipeline (GL3), it is middle pressure heat supply regulating valve (T2), in be depressed into
Heat supply vapour vapour heat exchanger inlet shutoff valve (5), in be depressed into heat supply vapour vapour heat exchanger exit stop valve (6), it is middle pressure heat supply header；
The standby middle pressure heating steam system includes：Standby middle pressure heating system pipeline (GL4), standby middle pressure heat supply system
Regulating valve of uniting (T3), standby middle pressure heating system stop valve (8), standby middle pressure heat supply temperature-decreased pressure reducer (JJ2)；
The vapour vapour heat exchanger system includes vapour vapour heat exchanger (HRQ) and is respectively arranged on changing on vapour vapour heat exchanger (HRQ)
Hot device drain valve (9), heat exchanger purge valve (10)；
Wherein, extraction for heat supply pipeline (GL6), which is connected to, takes out between back of the body unit (CBJ) and vapour vapour heat exchanger (HRQ), takes out back of the body machine
Draw gas to vapour vapour heat exchanger inlet shutoff valve (3) located at extraction for heat supply pipeline (GL6) and vapour vapour heat exchanger (HRQ) junction, take out
Back of the body machine draws gas to vapour vapour heat exchanger exit stop valve (4) located at the junction of vapour vapour heat exchanger (HRQ) and high pressure heat supply header, takes out
Back of the body machine draw gas to vapour vapour exchange heat bypass (GL2) extraction for heat supply pipeline (GL6) is connected with high pressure heat supply header, take out back of the body machine draw gas to
Vapour vapour recuperator bypass stop valve (1) draws gas to vapour vapour heat exchange bypass (GL2) located at back of the body machine is taken out；Steam discharge heat supplying pipeline (GL5)
It is connected to and takes out between back of the body unit (CBJ) and middle pressure heat supply header, steam discharge heat supply stop valve (7) is located at steam discharge heat supplying pipeline (GL5)
On；Standby high pressure heating system pipeline (GL1) is connected with high pressure heat supply header, standby high pressure heating system regulating valve (T1), standby
Standby high pressure heating system pipeline is respectively arranged on high pressure heat supply temperature-decreased pressure reducer (JJ1), standby high pressure heat supply stop valve (2)
(GL1) on；It is middle pressure heat supplying pipeline (GL3) be connected with vapour vapour heat exchanger (HRQ), which is provided with it is middle press heat supply regulating valve (T2), in
Be depressed into heat supply vapour vapour heat exchanger inlet shutoff valve (5), vapour vapour heat exchanger (HRQ) is connected with middle pressure heat supply header, in be depressed into heat supply
Vapour vapour heat exchanger exit stop valve (6) is located at the junction of vapour vapour heat exchanger (HRQ) and middle pressure heat supply header；Standby middle pressure heat supply
Middle pressure heat supplying pipeline (GL3) is connected by system pipeline (GL4) with middle pressure heat supply header, standby middle pressure heating system regulating valve
(T3), standby middle pressure heat supply temperature-decreased pressure reducer (JJ2), standby middle pressure heating system stop valve (8) are respectively arranged on standby middle pressure and supplied
On hot systems pipeline (GL4).
Preferably, the standby high pressure heat supply temperature-decreased pressure reducer (JJ1) is provided with standby middle pressure heat supply Desuperheating water regulating valve
(A)。
Preferably, the standby middle pressure heat supply temperature-decreased pressure reducer (JJ2) is provided with standby middle pressure heat supply Desuperheating water regulating valve
(B)。
Preferably, middle pressure heating steam system also includes heat exchanger safety valve (AQ1), and heat exchanger safety valve (AQ1) is located at
On the pipeline being connected with middle pressure heat supplying pipeline (GL3).
Preferably, it is described take out the back of the body unit (CBJ) and standby high pressure heating system pipeline (GL1) respectively with boiler overheating steam
Source or the connection of other high-pressure steam sources.
Preferably, vapour source is connected medium pressure heat supplying pipeline (GL3) again with boiler hot.
A kind of operation method of above-mentioned high pressure combining heating system, the operation of system main road, take out back of the body machine and draw gas and middle pressure confession
Heat, which is drawn gas, all walks vapour vapour heat exchanger (HRQ), takes out back of the body machine steam discharge and is directly entered middle pressure heat supply header, standby high pressure heating system pipe
Road (GL1) and take out back of the body machine draw gas to vapour vapour exchange heat bypass (GL2), it is standby it is middle pressure heating system pipeline (GL4) be turned off, the operating mode
Running status is：Take out back of the body machine system：High pressure heat supply draw gas → take out the back of the body unit (CBJ) → extraction for heat supply pipeline (GL6) → take out back of the body machine
Draw gas to vapour vapour heat exchanger entrance stop valve (3) → vapour vapour heat exchanger (HRQ) → take out back of the body machine and draw gas to vapour vapour heat exchanger exit and cut
Only valve (4) → high pressure heat supply header, the flow that steam supply is pressed in another way are：High pressure heat supply, which is drawn gas → taken out, carries on the back unit (CBJ) → row
Vapour heat supplying pipeline (GL5) → steam discharge heat supply stop valve (7), closing are taken out back of the body machine and drawn gas to vapour vapour recuperator bypass stop valve (1), standby
With high pressure heating system regulating valve (T1), standby high pressure heat supply temperature-decreased pressure reducer (JJ1), standby middle pressure heat supply Desuperheating water regulating valve
(A) and standby high pressure heat supply stop valve (2), isolate standby high pressure heating system and take out back of the body machine and draw gas to vapour vapour to exchange heat and bypass；In
Press heating steam system：Middle pressure heat supplying pipeline (GL3) → middle pressure heat supply regulating valve (T2) → in be depressed into heat supply vapour vapour heat exchanger and enter
Mouthful stop valve (5) → in be depressed into heat supply vapour vapour heat exchanger exit stop valve (6) → middle pressure heat supply header, close standby middle pressure heat supply
Desuperheating water regulating valve (B), it is standby it is middle pressure heating system regulating valve (T3) and it is standby it is middle press heating system stop valve (8) and it is standby in
Press heat supply temperature-decreased pressure reducer (JJ2), the standby middle pressure heating steam system of isolation.
A kind of operation method of above-mentioned high pressure combining heating system, being broken down for vapour vapour heat exchanger system needs to cut off
The operating mode of vapour vapour heat exchanger, high pressure heating steam is walked standby high pressure heating system and takes out back of the body machine and is drawn gas to the heat exchange bypass of vapour vapour
(GL2) run, middle pressure heating steam walks standby middle pressure heating system pipeline (GL4) operation, and the working condition running state is：High pressure supplies
Vapours system：Superheated steam → take out back of the body unit (CBJ) → extraction for heat supply pipeline (GL6) → is taken out back of the body machine and drawn gas to vapour vapour heat exchanger
Bypass stop valve (1) → high pressure heat supply header；Standby high pressure heating system puts into operation simultaneously：Superheated steam → standby high pressure supplies
Hot systems pipeline (GL1) → standby high pressure heating system regulating valve (T1) → standby high pressure heat supply temperature-decreased pressure reducer (JJ1) → standby
With high pressure heat supply stop valve (2) → high pressure heat supply header, while put into standby high pressure heating system desuperheating water；Closing is taken out back of the body machine and taken out
Vapour to vapour vapour heat exchanger inlet shutoff valve (3), take out back of the body machine and draw gas to vapour vapour heat exchanger exit stop valve (4), the vapour heat exchange of excision vapour
Device takes out back of the body machine extraction for heat supply side main road, and high pressure heating steam is to confess after main steam temperature reducing and pressure reducing and regenerative steam mixing；Middle pressure
Heating steam system：Hot steam again → standby middle pressure heating system pipeline (GL4) → standby middle pressure heating system regulating valve (T3)
→ standby middle middle pressure heating system the stop valve (8) of pressure heat supply temperature-decreased pressure reducer (JJ2) → standby → middle pressure heat supply header, at the same it is standby
Synchronously put into middle pressure heating system desuperheating water, open standby middle pressure heat supply Desuperheating water regulating valve (B), heat supply temperature is pressed in regulation
Meet heat user demand；Be depressed into closing heat supply vapour vapour heat exchanger inlet shutoff valve (5), in be depressed into heat supply vapour vapour heat exchanger exit
Stop valve (6), cut off and heat supply main road pressed in vapour vapour heat exchanger, open heat exchanger drain valve (9) and heat exchanger purge valve (10),
Disengaged vapor vapour heat exchanger internal pressure and discharge are hydrophobic.
A kind of operation method of above-mentioned high pressure combining heating system, breaking down for taking out back of the body machine system need to cut off and take out the back of the body
The operating mode of machine system and vapour vapour heat exchanger system, high pressure heat supply is supplied by standby high pressure heating steam system, middle pressure heat supply is steamed
Vapour is supplied by standby middle pressure heating system, and the working condition running state is：High pressure heating steam system：Superheated steam → standby high pressure
Heating system pipeline (GL1) → standby high pressure heating system regulating valve (T1) → standby high pressure heat supply temperature-decreased pressure reducer (JJ1) →
Standby high pressure heat supply stop valve (2) → high pressure heat supply header, while standby high pressure heating system desuperheating water is put into, back of the body machine is taken out in closing
Draw gas to vapour vapour heat exchanger inlet shutoff valve (3), take out back of the body machine and draw gas to vapour vapour heat exchanger exit stop valve (4) and take out back of the body machine and draw gas
To vapour vapour recuperator bypass stop valve (1), vapour vapour heat exchanger is cut off, simultaneously closes off steam discharge heat supply stop valve (7)；Middle pressure heat supply is steamed
Vapour system：Hot steam again → standby middle pressure heating system pipeline (GL4) → standby middle pressure heating system regulating valve (T3) → standby
Middle pressure heat supply temperature-decreased pressure reducer (JJ2) → standby middle pressure heating system stop valve (8) → middle pressure heat supply header, while standby middle pressure
Heating system desuperheating water is synchronously put into, and is opened standby middle pressure heat supply Desuperheating water regulating valve (B), is pressed heat supply temperature to meet heat in regulation
User's request, be depressed into closing heat supply vapour vapour heat exchanger inlet shutoff valve (5), in be depressed into heat supply vapour vapour heat exchanger exit stop valve
(6), cut off and heat supply main road is pressed in vapour vapour heat exchanger, open heat exchanger drain valve (9) and heat exchanger purge valve (10), disengaged vapor
Vapour heat exchanger internal pressure and discharge are hydrophobic.
It is described take out back of the body machine and enter decatize vapour come from boiler overheating steam or other high-pressure steam sources, be characterized in steam have compared with
High pressure and temperature, steam grade is high, and steam parameter needed for high pressure heating steam is far below and takes out back of the body machine steam inlet condition, so,
If be not provided with taking out the progress heat supply of back of the body machine, this strand of steam need to could carry out heat supply after pressure and temperature reducing.
Medium pressure heating system, from boiler hot, steam, its feature are that steam has higher temperature, and thermal source temperature again
Degree is stable, controllable, and its pressure and temperature is above middle pressure heat demand, it is necessary to after pressure and temperature reducing, then presses heat supply in carrying out.
Described middle pressure heating system is provided with middle pressure heat supply header, for the steam progress to separate sources temperature and pressure
Mixing, is allowed to uniform；Secondly, when external thermal load changes, header can play cushioning effect, ensure that pressure and temperature is steady
It is fixed.
The vapour vapour heat exchanger system, it is characterized in that heat exchanger cold-side fluid and hot side fluid are vapour system, and it is cold
Side liquid pressure is high, and hot side Fluid pressure is low, and both complete heat exchange in heat exchanger.
Standby high pressure heating system is set, and its effect has two：One is as the standby confession for taking out back of the body machine extraction for heat supply system
Hot vapour source, when taking out back of the body machine heating system and breaking down, high steam can be directly supplied by main steam pressure and temperature reducing, ensures and supplies
The reliability of heat；Secondly it is big in high pressure confession heat flow, when heating demand can not be met by taking out back of the body machine system, complementary heating steam.
Standby high pressure heating system sets standby high pressure heat supply temperature-decreased pressure reducer (JJ1), and its effect is to work as vapour vapour heat exchanger
During system jam, during by main steam heat supply, pressure and temperature reducing is carried out to main steam, steam is met heat demand.
Standby middle pressure heating system is set, and its effect has two：One is pressing heating steam in shunting, high pressure heat supply is reduced
The coupling of system；The second is when middle pressure heat supply main road breaks down, heat supply is provided in directly being provided by pressure and temperature reducing, ensured
The reliability of heat supply.
Standby middle pressure heating system sets standby middle pressure heat supply temperature-decreased pressure reducer (JJ2), and effect is to work as vapour vapour heat exchanger system
When system breaks down, heat supply is pressed in being supplied by reheated steam, this equipment carries out pressure and temperature reducing to reheated steam, makes steam meet to supply
Heat demand.
Middle pressure heating steam system sets heat exchanger safety valve (AQ1), when medium voltage side leaks, is pressed in can protecting
System, prevent superpressure from causing system damage.
Heat exchanger drain valve (9) on vapour vapour heat exchanger, when heat exchanger puts into or exited, exclude dredging in heat exchanger
Water.
Heat exchanger purge valve (10) on vapour vapour heat exchanger, when heat exchanger is put into, purge valve is opened, is excluded in it
Portion's air；During heat exchanger normal operation, purge valve is closed；When heat exchanger exits, after the excision of shell-side steam, emptying is opened
Gas, inner vacuum is destroyed, protect heater.
The advantages of the utility model：
Compared with prior art, first, the utility model is devised based on high, the middle pressure combined heat system for taking out back of the body machine technology
System, by the system, the recovery to heating steam acting ability is realized, while by vapour vapour heat exchanger system to heat supply energy
Reallocation, realize the cascade utilization of middle pressure heating steam energy；Secondly, the utility model heat supply scheme, contrast main vapour and draw gas
For heat supply scheme, divide production to become cogeneration of heat and power former thermoelectricity by taking out back of the body machine, improve the efficiency of using energy source；Again,
The utility model devises standby high pressure heating system and standby middle pressure heating system, by heat supply main road and bypass cooperation,
Flexibly, easily meets the needs of heat supply variable working condition.Therefore, by the utility model, efficiency of energy utilization is both improved, is carried again
The high reliability of heat supply.
Brief description of the drawings
Fig. 1 is the utility model design conditions operation schematic diagram；
Fig. 2 is that the utility model vapour vapour heater cuts off operating mode operation schematic diagram；
Fig. 3 is that the utility model takes out back of the body machine isolation operating condition operation schematic diagram.
Embodiment
Essentiality content of the present utility model is specifically introduced with reference to embodiment, but the utility model is not limited with this
Protection domain.The routine test operation that the test operation not being described in detail in experiment is well known to the skilled person.
As Figure 1-3 a kind of based on the high pressure combining heating system for taking out back of the body machine technology, including including taking out back of the body machine system
System, standby high pressure heating system, middle pressure heating steam system, standby middle pressure heating system and vapour vapour heat exchanger system；
The back of the body machine system of taking out includes：Take out the back of the body unit (CBJ), extraction for heat supply pipeline (GL6), steam discharge heat supplying pipeline (GL5),
Steam discharge heat supply stop valve (7), take out back of the body machine and draw gas to vapour vapour recuperator bypass stop valve (1), take out back of the body machine and draw gas to vapour vapour heat exchanger
Inlet shutoff valve (3), take out back of the body machine draw gas to vapour vapour heat exchanger exit stop valve (4), take out back of the body machine draw gas to vapour vapour exchange heat bypass
(GL2), high pressure heat supply header；
The standby high pressure heating system includes：Standby high pressure heating system pipeline (GL1), standby high pressure heating system are adjusted
Save valve (T1), standby high pressure heat supply temperature-decreased pressure reducer (JJ1), standby high pressure heat supply stop valve (2)；
Medium pressure heating steam system includes：It is middle pressure heat supplying pipeline (GL3), it is middle pressure heat supply regulating valve (T2), in be depressed into
Heat supply vapour vapour heat exchanger inlet shutoff valve (5), in be depressed into heat supply vapour vapour heat exchanger exit stop valve (6), it is middle pressure heat supply header；
The standby middle pressure heating steam system includes：Standby middle pressure heating system pipeline (GL4), standby middle pressure heat supply system
Regulating valve of uniting (T3), standby middle pressure heating system stop valve (8), standby middle pressure heat supply temperature-decreased pressure reducer (JJ2)；
The vapour vapour heat exchanger system includes vapour vapour heat exchanger (HRQ) and is respectively arranged on changing on vapour vapour heat exchanger (HRQ)
Hot device drain valve (9), heat exchanger purge valve (10)；
Wherein, extraction for heat supply pipeline (GL6), which is connected to, takes out between back of the body unit (CBJ) and vapour vapour heat exchanger (HRQ), takes out back of the body machine
Draw gas to vapour vapour heat exchanger inlet shutoff valve (3) located at extraction for heat supply pipeline (GL6) and vapour vapour heat exchanger (HRQ) junction, take out
Back of the body machine draws gas to vapour vapour heat exchanger exit stop valve (4) located at the junction of vapour vapour heat exchanger (HRQ) and high pressure heat supply header, takes out
Back of the body machine draw gas to vapour vapour exchange heat bypass (GL2) extraction for heat supply pipeline (GL6) is connected with high pressure heat supply header, take out back of the body machine draw gas to
Vapour vapour recuperator bypass stop valve (1) draws gas to vapour vapour heat exchange bypass (GL2) located at back of the body machine is taken out；Steam discharge heat supplying pipeline (GL5)
It is connected to and takes out between back of the body unit (CBJ) and middle pressure heat supply header, steam discharge heat supply stop valve (7) is located at steam discharge heat supplying pipeline (GL5)
On；Standby high pressure heating system pipeline (GL1) is connected with high pressure heat supply header, standby high pressure heating system regulating valve (T1), standby
Standby high pressure heating system pipeline is respectively arranged on high pressure heat supply temperature-decreased pressure reducer (JJ1), standby high pressure heat supply stop valve (2)
(GL1) on；It is middle pressure heat supplying pipeline (GL3) be connected with vapour vapour heat exchanger (HRQ), which is provided with it is middle press heat supply regulating valve (T2), in
Be depressed into heat supply vapour vapour heat exchanger inlet shutoff valve (5), vapour vapour heat exchanger (HRQ) is connected with middle pressure heat supply header, in be depressed into heat supply
Vapour vapour heat exchanger exit stop valve (6) is located at the junction of vapour vapour heat exchanger (HRQ) and middle pressure heat supply header；Standby middle pressure heat supply
Middle pressure heat supplying pipeline (GL3) is connected by system pipeline (GL4) with middle pressure heat supply header, standby middle pressure heating system regulating valve
(T3), standby middle pressure heat supply temperature-decreased pressure reducer (JJ2), standby middle pressure heating system stop valve (8) are respectively arranged on standby middle pressure and supplied
On hot systems pipeline (GL4).
Standby high pressure heat supply temperature-decreased pressure reducer (JJ1) is provided with standby middle pressure heat supply Desuperheating water regulating valve (A).
Standby middle pressure heat supply temperature-decreased pressure reducer (JJ2) is provided with standby middle pressure heat supply Desuperheating water regulating valve (B).
Middle pressure heating steam system also includes heat exchanger safety valve (AQ1), and heat exchanger safety valve (AQ1) is located to be supplied with middle pressure
On the pipeline of pipe line (GL3) connection.
Take out the back of the body unit (CBJ) and standby high pressure heating system pipeline (GL1) respectively with boiler overheating steam source or other height
Press vapour source connection.Vapour source is connected middle pressure heat supplying pipeline (GL3) again with boiler hot.
Such as Fig. 1, during the utility model design conditions, the operation of system main road takes out that back of the body machine is drawn gas and middle pressure heat supply is drawn gas whole
Walk vapour vapour heat exchanger (HRQ), take out back of the body machine steam discharge be directly entered it is middle pressure heat supply header, standby high pressure heating system pipeline (GL1) and
Back of the body machine is taken out to draw gas to the heat exchange of vapour vapour bypasses (GL2), standby middle pressure heating system pipeline (GL4) is turned off, the working condition running state
For：Take out back of the body machine system：High pressure heat supply draw gas → take out the back of the body unit (CBJ) → extraction for heat supply pipeline (GL6) → take out back of the body machine and draw gas to vapour
Vapour heat exchanger entrance stop valve (3) → vapour vapour heat exchanger (HRQ) → take out back of the body machine draw gas to vapour vapour heat exchanger exit stop valve (4) →
High pressure heat supply header, the flow that steam supply is pressed in another way are：High pressure heat supply, which is drawn gas → taken out, carries on the back unit (CBJ) → steam discharge heat supplying pipeline
(GL5) → steam discharge heat supply stop valve (7), closing are taken out back of the body machine and drawn gas to vapour vapour recuperator bypass stop valve (1), standby high pressure heat supply
System fading margin valve (T1), standby high pressure heat supply temperature-decreased pressure reducer (JJ1), standby middle pressure heat supply Desuperheating water regulating valve (A) and standby
High pressure heat supply stop valve (2), isolate standby high pressure heating system and take out back of the body machine and draw gas to the heat exchange bypass of vapour vapour；Middle pressure heating steam
System：Middle pressure heat supplying pipeline (GL3) → middle pressure heat supply regulating valve (T2) → in be depressed into heat supply vapour vapour heat exchanger inlet shutoff valve (5)
→ in be depressed into heat supply vapour vapour heat exchanger exit stop valve (6) → middle pressure heat supply header, close standby middle pressure heat supply desuperheating water regulation
Valve (B), standby middle pressure heating system regulating valve (T3) and standby middle pressure heating system stop valve (8) and standby middle pressure heat supply desuperheat
Pressure reducer (JJ2), the standby middle pressure heating steam system of isolation.
Such as Fig. 2, when vapour vapour heat exchanger system breaks down, vapour vapour heat exchanger need to be cut off, high pressure heating steam is walked standby
Drawn gas with high pressure heating system with back of the body machine is taken out to vapour vapour heat exchange bypass (GL2) operation, it is middle to press heating steam to walk standby middle pressure heat supply
System pipeline (GL4) is run, and the working condition running state is：High pressure heating steam system：Superheated steam → take out back of the body unit (CBJ) →
Extraction for heat supply pipeline (GL6) → take out back of the body machine draws gas to vapour vapour recuperator bypass stop valve (1) → high pressure heat supply header；It is simultaneously standby
High pressure heating system puts into operation：Superheated steam → standby high pressure heating system pipeline (GL1) → standby high pressure heating system is adjusted
Valve (T1) → standby high pressure heat supply temperature-decreased pressure reducer (JJ1) → standby high pressure heat supply stop valve (2) → high pressure heat supply header is saved, together
When put into standby high pressure heating system desuperheating water；Closing takes out back of the body machine and draws gas to vapour vapour heat exchanger inlet shutoff valve (3), takes out back of the body machine and take out
Vapour to vapour vapour heat exchanger exit stop valve (4), excision vapour vapour heat exchanger takes out back of the body machine extraction for heat supply side main road, and high pressure heating steam is
Confessed after main steam pressure and temperature reducing and regenerative steam mixing；Middle pressure heating steam system：Hot steam again → standby middle pressure heat supply system
In the middle pressure heating system regulating valve (T3) of road (GL4) under the overall leadership → standby → standby middle pressure heat supply temperature-decreased pressure reducer (JJ2) → standby
Heating system stop valve (8) → middle pressure heat supply header is pressed, while standby middle pressure heating system desuperheating water is synchronously put into, and is opened standby
Middle pressure heat supply Desuperheating water regulating valve (B), presses heat supply temperature to meet heat user demand in regulation；The heat exchange of heat supply vapour vapour is depressed into closing
Device inlet shutoff valve (5), in be depressed into heat supply vapour vapour heat exchanger exit stop valve (6), cut off and heat supply main road pressed in vapour vapour heat exchanger,
Heat exchanger drain valve (9) and heat exchanger purge valve (10) are opened, disengaged vapor vapour heat exchanger internal pressure and discharge are hydrophobic.
Such as Fig. 3, when taking out back of the body machine system and breaking down out of service, it need to cut off and take out back of the body machine system and vapour vapour heat exchanger system
System, high pressure heat supply is supplied by standby high pressure heating steam system, and middle pressure heating steam, should by standby middle pressure heating system supply
Working condition running state is：High pressure heating steam system：Superheated steam → standby high pressure heating system pipeline (GL1) → standby high pressure
Heating system regulating valve (T1) → standby high pressure heat supply temperature-decreased pressure reducer (JJ1) → standby high pressure heat supply stop valve (2) → high pressure
Heat supply header, while standby high pressure heating system desuperheating water is put into, closing is taken out back of the body machine and drawn gas to vapour vapour heat exchanger inlet shutoff valve
(3) back of the body machine, is taken out to draw gas to vapour vapour heat exchanger exit stop valve (4) and take out back of the body machine and draw gas to vapour vapour recuperator bypass stop valve (1),
Vapour vapour heat exchanger is cut off, simultaneously closes off steam discharge heat supply stop valve (7)；Middle pressure heating steam system：Hot steam → standby middle pressure again
Heating system pipeline (GL4) → standby middle pressure heating system regulating valve (T3) → standby middle pressure heat supply temperature-decreased pressure reducer (JJ2) →
Standby middle pressure heating system stop valve (8) → middle pressure heat supply header, while standby middle pressure heating system desuperheating water is synchronously put into, and is beaten
Standby middle pressure heat supply Desuperheating water regulating valve (B) is opened, presses heat supply temperature to meet heat user demand in regulation, heat supply vapour is depressed into closing
Vapour heat exchanger inlet shutoff valve (5), in be depressed into heat supply vapour vapour heat exchanger exit stop valve (6), cut off to press in vapour vapour heat exchanger and supply
Hot main road, opens heat exchanger drain valve (9) and heat exchanger purge valve (10), and disengaged vapor vapour heat exchanger internal pressure and discharge are dredged
Water.
When vapour vapour heat exchanger medium voltage side leaks, and pressure exceedes heat exchanger safety valve (AQ1) operating pressure, heat exchanger
Safety valve (AQ1) is opened, system releasing pressure automatically, ensures medium voltage network safety.
By taking subcritical 300MW units as an example, high pressure heating steam described in the utility model is derived from main steam, middle pressure heat supply
Steam is derived from heat steam again；Each technological boundary parameter is：Back pressure engine efficiency takes 75%, and pipeline efficiency takes 98.5%, boiler efficiency
93.14% is taken, station service power consumption rate takes 5.3%, former height, the heat supply of middle pressure steam pressure and temperature reducing and the system operation pair designed according to Fig. 1
It see the table below than data：
| Project | Unit | Former scheme | Scheme after transformation | Difference |
| Unit power output | kW | 242728.81 | 231666.27 | -11062.54 |
| Back pressure machine power output | kW | 0.00 | 18249.27 | 18249.27 |
| Main vapour pressure | MPa | 16.70 | 16.70 | |
| Stream temperature degree | ℃ | 538.00 | 538.00 | |
| Main steam flow | t/h | 1025.00 | 1025.00 | |
| Back pressure machine exhaust steam pressure | MPa | 16.70 | 4.10 | |
| Back pressure machine exhaust temperature | ℃ | 538.00 | 351.87 | |
| Hot re-compaction power | MPa | 2.35 | 2.29 | |
| Hot temperature again | ℃ | 538.00 | 538.00 | |
| Hot (heat supply) extraction pressure again | MPa | 2.35 | 2.26 | |
| Hot (heat supply) extraction temperature again | ℃ | 538.00 | 371.87 | |
| The new steam consumption of steam turbine | kg/h | 1025000.00 | 1025000.00 | |
| The main vapour heat supply amount of drawing gas | kg/h | 120000.00 | 120000.00 | |
| The hot heat supply amount of drawing gas again | kg/h | 145193.57 | 153812.04 | |
| The thermal efficiency | % | 64.70 | 66.02 | 1.31 |
| Standard coal consumption rate of power supply | g/kwh | 271.52 | 262.34 | -9.18 |
Added as can be seen from the data in the table, being contributed using system of the present utility model than former heating system
7186.73kW, the thermal efficiency improve 1.31 percentage points, and coal consumption reduces 9.18g/kWh.
The effect of above-described embodiment is specifically to introduce essentiality content of the present utility model, but those skilled in the art should
When knowing, the scope of protection of the utility model should not be confined to the specific embodiment.
Claims (6)
- It is 1. a kind of based on the high pressure combining heating system for taking out back of the body machine technology, it is characterised in that：Including taking out back of the body machine system, standby height Press heating system, middle pressure heating steam system, standby middle pressure heating system and vapour vapour heat exchanger system；The back of the body machine system of taking out includes：Take out back of the body unit (CBJ), extraction for heat supply pipeline (GL6), steam discharge heat supplying pipeline (GL5), steam discharge Heat supply stop valve (7), take out back of the body machine and draw gas to vapour vapour recuperator bypass stop valve (1), take out back of the body machine and draw gas to vapour vapour heat exchanger import Stop valve (3), take out back of the body machine draw gas to vapour vapour heat exchanger exit stop valve (4), take out back of the body machine draw gas to vapour vapour exchange heat bypass (GL2), High pressure heat supply header；The standby high pressure heating system includes：Standby high pressure heating system pipeline (GL1), standby high pressure heating system regulating valve (T1), standby high pressure heat supply temperature-decreased pressure reducer (JJ1), standby high pressure heat supply stop valve (2)；Medium pressure heating steam system includes：It is middle pressure heat supplying pipeline (GL3), it is middle pressure heat supply regulating valve (T2), in be depressed into heat supply Vapour vapour heat exchanger inlet shutoff valve (5), in be depressed into heat supply vapour vapour heat exchanger exit stop valve (6), it is middle pressure heat supply header；The standby middle pressure heating steam system includes：Standby middle pressure heating system pipeline (GL4), standby middle pressure heating system are adjusted Save valve (T3), standby middle pressure heating system stop valve (8), standby middle pressure heat supply temperature-decreased pressure reducer (JJ2)；The vapour vapour heat exchanger system includes vapour vapour heat exchanger (HRQ) and the heat exchanger being respectively arranged on vapour vapour heat exchanger (HRQ) Drain valve (9), heat exchanger purge valve (10)；Wherein, extraction for heat supply pipeline (GL6), which is connected to, takes out between back of the body unit (CBJ) and vapour vapour heat exchanger (HRQ), takes out back of the body machine and draws gas To vapour vapour heat exchanger inlet shutoff valve (3) located at extraction for heat supply pipeline (GL6) and vapour vapour heat exchanger (HRQ) junction, back of the body machine is taken out Draw gas to vapour vapour heat exchanger exit stop valve (4) located at the junction of vapour vapour heat exchanger (HRQ) and high pressure heat supply header, take out back of the body machine Draw gas to vapour vapour heat exchange bypass (GL2) and be connected extraction for heat supply pipeline (GL6) with high pressure heat supply header, take out back of the body machine and draw gas to vapour vapour Recuperator bypass stop valve (1) draws gas to vapour vapour heat exchange bypass (GL2) located at back of the body machine is taken out；Steam discharge heat supplying pipeline (GL5) connects In taking out between back of the body unit (CBJ) and middle pressure heat supply header, steam discharge heat supply stop valve (7) is on steam discharge heat supplying pipeline (GL5)；It is standby It is connected with high pressure heating system pipeline (GL1) with high pressure heat supply header, standby high pressure heating system regulating valve (T1), standby high pressure Heat supply temperature-decreased pressure reducer (JJ1), standby high pressure heat supply stop valve (2) are respectively arranged on standby high pressure heating system pipeline (GL1)； It is middle pressure heat supplying pipeline (GL3) be connected with vapour vapour heat exchanger (HRQ), which is provided with it is middle press heat supply regulating valve (T2), in be depressed into heat supply Vapour vapour heat exchanger inlet shutoff valve (5), vapour vapour heat exchanger (HRQ) with it is middle pressure heat supply header be connected, in be depressed into heat supply vapour vapour exchange heat Device outlet shutoff valve (6) is located at the junction of vapour vapour heat exchanger (HRQ) and middle pressure heat supply header；Standby middle pressure heating system pipeline (GL4) by it is middle pressure heat supplying pipeline (GL3) with it is middle pressure heat supply header be connected, it is standby it is middle press heating system regulating valve (T3), it is standby in Pressure heat supply temperature-decreased pressure reducer (JJ2), standby middle pressure heating system stop valve (8) are respectively arranged on standby middle pressure heating system pipeline (GL4) on.
- 2. high pressure combining heating system according to claim 1, it is characterised in that：The standby high pressure heat supply desuperheat subtracts Depressor (JJ1) is provided with standby middle pressure heat supply Desuperheating water regulating valve (A).
- 3. high pressure combining heating system according to claim 2, it is characterised in that：The standby middle pressure heat supply desuperheat subtracts Depressor (JJ2) is provided with standby middle pressure heat supply Desuperheating water regulating valve (B).
- 4. high pressure combining heating system according to claim 3, it is characterised in that：Middle pressure heating steam system also includes Heat exchanger safety valve (AQ1), heat exchanger safety valve (AQ1) are located on the pipeline being connected with middle pressure heat supplying pipeline (GL3).
- 5. high pressure combining heating system according to claim 1, it is characterised in that：It is described to take out back of the body unit (CBJ) and standby It is connected respectively with boiler overheating steam source or other high-pressure steam sources with high pressure heating system pipeline (GL1).
- 6. high pressure combining heating system according to claim 1, it is characterised in that：Medium pressure heat supplying pipeline (GL3) Vapour source is connected again with boiler hot.
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| CN201721201247.5U CN207196593U (en) | 2017-09-19 | 2017-09-19 | It is a kind of based on the high pressure combining heating system for taking out back of the body machine technology |
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| CN201721201247.5U CN207196593U (en) | 2017-09-19 | 2017-09-19 | It is a kind of based on the high pressure combining heating system for taking out back of the body machine technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108506921A (en) * | 2018-04-25 | 2018-09-07 | 西安西热节能技术有限公司 | A kind of the mesohigh industry steam-supplying system and method for station boiler |
| CN109653818A (en) * | 2018-11-30 | 2019-04-19 | 东方电气集团东方汽轮机有限公司 | A kind of two-stage back pressure machine reheating extraction for heat supply System and method for |
| CN113446076A (en) * | 2021-06-29 | 2021-09-28 | 国能南京电力试验研究有限公司 | Industrial heat supply parameter matching method based on grading matching |
-
2017
- 2017-09-19 CN CN201721201247.5U patent/CN207196593U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108506921A (en) * | 2018-04-25 | 2018-09-07 | 西安西热节能技术有限公司 | A kind of the mesohigh industry steam-supplying system and method for station boiler |
| CN108506921B (en) * | 2018-04-25 | 2024-04-30 | 西安西热节能技术有限公司 | Medium-high pressure industrial steam supply system and method for power station boiler |
| CN109653818A (en) * | 2018-11-30 | 2019-04-19 | 东方电气集团东方汽轮机有限公司 | A kind of two-stage back pressure machine reheating extraction for heat supply System and method for |
| CN113446076A (en) * | 2021-06-29 | 2021-09-28 | 国能南京电力试验研究有限公司 | Industrial heat supply parameter matching method based on grading matching |
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Address after: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee after: Guoneng Nanjing Electric Power Test Research Co.,Ltd. Patentee after: Guoneng (Quanzhou) Thermal Power Co.,Ltd. Address before: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee before: GUODIAN NANJING ELECTRIC POWER TEST RESEARCH Co.,Ltd. Patentee before: Guoneng (Quanzhou) Thermal Power Co.,Ltd. |
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Address after: 362804 Kecuo village, Nanpu Town, Quangang District, Quanzhou City, Fujian Province Patentee after: Guoneng (Quanzhou) Thermal Power Co.,Ltd. Patentee after: Guoneng Nanjing Electric Power Test Research Co.,Ltd. Address before: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee before: Guoneng Nanjing Electric Power Test Research Co.,Ltd. Patentee before: Guoneng (Quanzhou) Thermal Power Co.,Ltd. |
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