CN108612570A - Using the supercritical carbon dioxide turbomachine working medium displacement apparatus and method of dry gas seals - Google Patents
Using the supercritical carbon dioxide turbomachine working medium displacement apparatus and method of dry gas seals Download PDFInfo
- Publication number
- CN108612570A CN108612570A CN201810674210.7A CN201810674210A CN108612570A CN 108612570 A CN108612570 A CN 108612570A CN 201810674210 A CN201810674210 A CN 201810674210A CN 108612570 A CN108612570 A CN 108612570A
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- China
- Prior art keywords
- pipeline
- carbon dioxide
- dry gas
- valve
- gas seals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 242
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 121
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 120
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000008676 import Effects 0.000 claims abstract description 35
- 239000000411 inducer Substances 0.000 claims description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 241000790917 Dioxys <bee> Species 0.000 claims 1
- 239000013589 supplement Substances 0.000 claims 1
- 230000000284 resting effect Effects 0.000 abstract 1
- 229960004424 carbon dioxide Drugs 0.000 description 86
- 238000005516 engineering process Methods 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
- F01D11/06—Control thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses the supercritical carbon dioxide turbomachine working medium displacement apparatus and method using dry gas seals,The device includes turbomachine stator,Main shaft,Dry gas seals,Stator blade,Movable vane,Spring bearing,Import segment pipe,Import segment pipe,Export segment pipe,Aspiration,Shut-off valve,Vacuum pump,Accident conditions empty pipeline,High-pureness carbon dioxide air source,Dry gas seals pipeline,Main tonifying Qi pipeline,Adjust valve,By controlling the break-make of valve and the start and stop of vacuum pump on each pipeline of the device,Realize the air in supercritical carbon dioxide turbomachine equipment by repeatedly suction,Inflation,Resting cycles,The final supercritical carbon dioxide working medium for being replaced by high-purity,The invention can overcome dead angle air in turbomachine equipment to be not easy the unfavorable difficulty replaced,It can guarantee that dry gas seals are without damage in working medium replacement process,Make in supercritical carbon dioxide turbomachine equipment working medium purity up to 99.9% or more.
Description
Technical field
The present invention relates to supercritical carbon dioxide turbomachine working medium replacement technique fields, and in particular to a kind of to use dry gas
The supercritical carbon dioxide turbomachine working medium displacement apparatus and method of sealing.
Background technology
Supercritical carbon dioxide system is to the more demanding of carbon dioxide purity, generally 99.9% or more, therefore it is critical
Before carbon-dioxide gas compressor and the operation of supercritical carbon dioxide turbine plant, need the air inside equipment being replaced into high-purity
Carbon dioxide, it is high-purity in reduction system to prevent the air in supercritical carbon dioxide turbomachine equipment from entering the circulatory system
Spend carbon dioxide working medium concentration.Minimum pressure in supercritical carbon dioxide system should be greater than critical pressure 7.39MPa, so super
Critical carbon dioxide turbomachine equipment, including supercritical carbon dioxide compressor and the normal work of supercritical carbon dioxide turbine
Make internal pressure at least in 7.39MPa, so that system effectiveness is reduced to prevent carbon dioxide working medium from leaking out, it is most effective to arrange
Apply is to use shaft end dry gas seals technology, and dry gas seals have stringent operating specification, and dry gas seals need to be prevented to be in static state
Big negative pressure countercurrently and into impurity is damaged.Therefore, it is replaced in high-purity working medium in supercritical carbon dioxide turbomachine equipment
There are problems that following three are not resolved in the process：1, supercritical carbon dioxide turbomachine device memory is in dead angle, air-flow
Vortex is formd when access device at dead angle, air is not easy to flow out out of dead angle, and the working medium that cannot be effectively accomplished requirement is pure
Degree；2, the displacement of supercritical carbon dioxide turbomachine equipment working medium is needed so which type of working medium displacement dress built on its basis
It sets；3, during supercritical carbon dioxide turbomachine equipment working medium is replaced, dry gas seals how to be protected to make its performance not
It is impacted.Have no that the prior art does not provide the effective solution of the above problem.
Invention content
The purpose of the present invention is that solve the above-mentioned problems and provides using the overcritical of shaft end dry gas seals technology
Carbon dioxide turbomachine equipment high-purity working medium displacement apparatus and method, by supercritical carbon dioxide turbomachine equipment
Outlet section or import segment pipe on triplate line is set, one of outlet empties pipeline, setting cut-off as accident conditions
Shut-off valve is arranged as aspiration in valve, another pipeline, and setting vacuum pump is exported in aspiration.
The present invention is achieved through the following technical solutions above-mentioned purpose：
Using the supercritical carbon dioxide turbomachine working medium displacement apparatus of dry gas seals, including supercritical carbon dioxide leaf
Wheel mechanical stator 1, supercritical carbon dioxide turbomachine main shaft 2, dry gas seals 3, stator blade 4, movable vane 5, spring bearing 6, import
Segment pipe or outlet segment pipe 7, import segment pipe or outlet section pipeline valve 8, outlet segment pipe or import segment pipe 9, outlet
Segment pipe or inducer pipeline valve 10, aspiration 11, suction channel shut-off valve 12, vacuum pump 13, accident conditions evacuated tube
Road 19, accident conditions emptying pipeline shut-off valve 20, high-pureness carbon dioxide air source 14, high-pressure side dry gas seals pipeline 15, low pressure
Hold dry gas seals pipeline 16, main tonifying Qi pipeline 21, high-pressure side dry gas seals pipeline tune valve 17, low-pressure end dry gas seals pipeline tune valve
18 and main tonifying Qi pipeline tune valve 22；Wherein, import segment pipe or outlet segment pipe 7 and outlet segment pipe or import segment pipe 9 are equal
Be connected with supercritical carbon dioxide turbomachine stator 1, import segment pipe or outlet section pipeline valve 8 be located at import segment pipe or
It exports on segment pipe 7, exports segment pipe or inducer pipeline valve 10 is located on outlet segment pipe or import segment pipe 9, super
There are two spring bearing 6, stator blade 4 and supercritical carbon dioxide impellers respectively at the both ends of critical carbon dioxide turbomachine main shaft 2
Mechanical stator 1 be connected, movable vane 5 is connected with supercritical carbon dioxide turbomachine main shaft 2, the inside of two spring bearings 6 with
Stator blade 4, movable vane 5 outside be provided with dry gas seals 3, dry gas seals 3 are divided for high-pressure side dry gas seals and low-pressure side dry gas seals,
High-pressure side dry gas seals and low-pressure side dry gas seals pass through high-pressure side dry gas seals pipeline 15 and low-pressure end dry gas seals pipe respectively
Road 16 is connect with high-pureness carbon dioxide air source 14, on high-pressure side dry gas seals pipeline 15 and low-pressure end dry gas seals pipeline 16
Be respectively arranged with high-pressure side dry gas seals pipeline tune valve 17 and low-pressure end dry gas seals pipeline tune valve 18, outlet segment pipe or into
On the mouth segment pipe 9 and upstream or downstream of outlet segment pipe or inducer pipeline valve 10 is provided with aspiration 11, aspirates
It is provided with suction channel shut-off valve 12 on pipeline 11,12 downstream of suction channel shut-off valve is provided with vacuum pump 13, in suction tube
On the road 11 and upstream of suction channel shut-off valve 12 is provided with accident conditions emptying pipeline 19, and accident conditions empty on pipeline 19
It is provided with accident conditions emptying pipeline shut-off valve 20, in aspiration 11 and the upstream of accident conditions emptying pipeline 19 is arranged
There are main tonifying Qi pipeline 21, the other end of main tonifying Qi pipeline 21 to be connected to high-pureness carbon dioxide air source 14, on main tonifying Qi pipeline 21
It is provided with main tonifying Qi pipeline tune valve 22.
The high-pureness carbon dioxide air source 14 has the height for being not less than 99.9% with extraneous high pressure grade and concentration
The normally closed connector of purity carbon dioxide working medium storage tank leads to when the air pressure of high-pureness carbon dioxide air source 14 is less than setting value
It crosses and opens normally closed connector, the high pressure outside the supercritical carbon dioxide turbomachine working medium displacement apparatus using dry gas seals
High-pureness carbon dioxide working medium is supplemented at the high-pureness carbon dioxide working medium storage tank of power grade.
The other end outlet of the accident conditions emptying pipeline 19 in 20 outside of accident conditions emptying pipeline shut-off valve described in 3,
On the outside of the workshop where the supercritical carbon dioxide turbomachine working medium displacement apparatus using dry gas seals.
The working medium method of replacing of the supercritical carbon dioxide turbomachine working medium displacement apparatus using dry gas seals,
Include the following steps：
Step 1, the supercritical carbon dioxide circulatory system are assigned carries out working medium displacement to supercritical carbon dioxide turbomachine
After order, import segment pipe or outlet section pipeline valve 8, outlet segment pipe or inducer pipeline valve 10 and accident conditions are arranged
Blank pipe road shut-off valve 20 is set as long off state；
Step 2 closes high-pressure side dry gas seals pipeline tune valve 17, low-pressure end dry gas seals pipeline tune valve 18 and main blowdown pipe
Road tune valve 22 opens suction channel shut-off valve 12, by vacuum pump 13 to supercritical carbon dioxide turbomachine inside and inlet and outlet
Gas in the connected space of pipeline is evacuated, until when the air pressure in the connected space is to a certain setting pressure P, is closed and is taken out
Suction pipe road shut-off valve 12 and vacuum pump 13；
Step 3 opens high-pressure side dry gas seals pipeline tune valve 17, low-pressure end dry gas seals pipeline tune valve 18 and main blowdown pipe
Road tune valve 22, high-pureness carbon dioxide air source 14 are dry by main tonifying Qi pipeline 21, high-pressure side dry gas seals pipeline 15 and low-pressure end
Hermetic seal pipeline 16 carries out tonifying Qi into the connected space of supercritical carbon dioxide turbomachine inside and inlet and outlet pipeline, until
After air pressure to atmospheric pressure P0 in the connected space, high-pressure side dry gas seals pipeline tune valve 17, low-pressure end dry gas seals are closed
Pipeline tune valve 18 and main tonifying Qi pipeline tune valve 22；
Step 4 keeps high-pressure side dry gas seals pipeline tune valve 17, low-pressure end dry gas seals pipeline tune valve 18, main blowdown pipe
Road tune valve 22 and suction channel shut-off valve 12 are closed, and make supercritical carbon dioxide turbomachine inside and inlet/outlet pipe
The connected space time of repose in road reaches the set time T of setting, makes foreign gas molecule in the intermolecular expansion of carbon dioxide gas
It dissipates；
Step 5 repeats step 2 to the operation of step 4 and reaches setting times N, makes in supercritical carbon dioxide turbomachine
The concentration of the connected space of portion and inlet and outlet pipeline reaches system requirements purity C.
When gas inside supercritical carbon dioxide turbomachine and in the connected space of inlet and outlet pipeline is evacuated, greatly
The difference of the atmospheric pressure P0 and setting pressure P in the connected space is less than the peak suction that can bear when 3 static state of dry gas seals.
It is the setting times N of supercritical carbon dioxide turbomachine working medium suction, setting pressure P, system requirements purity C, big
Atmospheric pressure P0 meets calculation formula 73.9- (P/P0)N≥73.9C。
Inside supercritical carbon dioxide turbomachine and the connected space of inlet and outlet pipeline stand the set time T that sets as
2 to 5 minutes.
Compared to the prior art compared with, the beneficial effects of the present invention are：
The present invention proposes the supercritical carbon dioxide turbomachine equipment high-purity work using shaft end dry gas seals technology
Matter displacement apparatus and method, be based on the device and high-purity working medium method of replacing, by gas vacuum suction, fill row normal pressure it is high-purity
It spends working medium and stands the multiple cycle of three processes, overcome in supercritical carbon dioxide turbomachine equipment in dead angle air not
The unfavorable factor easily replaced ensure that dry gas seals ensure performance during working medium is replaced by the vacuum degree for choosing suitable
It is unaffected.In this sense the present invention solves the supercritical carbon dioxide turbine using shaft end dry gas seals technology
The technical barrier of tool equipment high-purity working medium displacement, keeps working medium purity in supercritical carbon dioxide turbomachine equipment reachable
99.9%, and can ensure that dry gas seals are without damage in working medium replacement process.
Description of the drawings
Fig. 1 is schematic diagram of the present invention using the supercritical carbon dioxide turbomachine working medium displacement apparatus of dry gas seals.
1 is supercritical carbon dioxide turbomachine stator；2 be supercritical carbon dioxide turbomachine main shaft；3 is close for dry gas
Envelope；4 be stator blade；5 be movable vane；6 be spring bearing；7 be import segment pipe (or outlet segment pipe)；8 (or go out for import segment pipe
Mouth segment pipe) valve；9 be outlet segment pipe (or import segment pipe)；10 be outlet segment pipe (or import segment pipe) valve；11
For aspiration；12 be suction channel shut-off valve；13 be vacuum pump；14 be high-pureness carbon dioxide air source；15 is dry for high-pressure side
Hermetic seal pipeline；16 be low-pressure end dry gas seals pipeline；17 be high-pressure side dry gas seals pipeline tune valve；18 is close for low-pressure end dry gas
Tube sealing road tune valve；19 empty pipeline for accident conditions；20 empty pipeline shut-off valve for accident conditions；21 be main tonifying Qi pipeline；22
For main tonifying Qi pipeline tune valve.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings：
As shown in Figure 1, the present invention uses the supercritical carbon dioxide turbomachine working medium displacement apparatus of dry gas seals, including
Supercritical carbon dioxide turbomachine stator 1, supercritical carbon dioxide turbomachine main shaft 2, dry gas seals 3, stator blade 4, movable vane
5, spring bearing 6, import segment pipe or outlet segment pipe 7, import segment pipe or outlet section pipeline valve 8, outlet segment pipe or
Import segment pipe 9, outlet segment pipe or inducer pipeline valve 10, aspiration 11, suction channel shut-off valve 12, vacuum pump
13, accident conditions emptying pipeline 19, accident conditions emptying pipeline shut-off valve 20, high-pureness carbon dioxide air source 14, high-pressure side are dry
Hermetic seal pipeline 15, low-pressure end dry gas seals pipeline 16, main tonifying Qi pipeline 21, high-pressure side dry gas seals pipeline tune valve 17, low pressure
Hold dry gas seals pipeline tune valve 18 and main tonifying Qi pipeline tune valve 22；Wherein, import segment pipe or outlet segment pipe 7 and outlet section pipe
Road or import segment pipe 9 are connected with supercritical carbon dioxide turbomachine stator 1, import segment pipe or outlet section pipeline valve
8 are located on import segment pipe or outlet segment pipe 7, export segment pipe or inducer pipeline valve 10 be located at outlet segment pipe or into
On mouthful segment pipe 9, at the both ends of supercritical carbon dioxide turbomachine main shaft 2 respectively there are two spring bearing 6, stator blade 4 with it is super
Critical carbon dioxide turbomachine stator 1 is connected, and movable vane 5 is connected with supercritical carbon dioxide turbomachine main shaft 2, in two branch
The outside of the inside and stator blade 4, movable vane 5 of supportting bearing 6 is provided with dry gas seals 3, dry gas seals 3 divide for high-pressure side dry gas seals and
Low-pressure side dry gas seals, high-pressure side dry gas seals and low-pressure side dry gas seals are respectively by high-pressure side dry gas seals pipeline 15 and low
Pressure side dry gas seals pipeline 16 is connect with high-pureness carbon dioxide air source 14, dry in high-pressure side dry gas seals pipeline 15 and low-pressure end
High-pressure side dry gas seals pipeline tune valve 17 and low-pressure end dry gas seals pipeline tune valve 18 are respectively arranged on hermetic seal pipeline 16,
On the outlet segment pipe or import segment pipe 9 and upstream or downstream of outlet segment pipe or inducer pipeline valve 10 is provided with pumping
Suction pipe road 11 is provided with suction channel shut-off valve 12 in aspiration 11,12 downstream of suction channel shut-off valve is provided with vacuum
Pump 13, in aspiration 11 and the upstream of suction channel shut-off valve 12 is provided with accident conditions emptying pipeline 19, accident work
Accident conditions emptying pipeline shut-off valve 20 is provided on condition emptying pipeline 19, in aspiration 11 and accident conditions evacuated tube
The upstream on road 19 is provided with main tonifying Qi pipeline 21, and the other end of main tonifying Qi pipeline 21 is connected to high-pureness carbon dioxide air source 14,
Main tonifying Qi pipeline tune valve 22 is provided on main tonifying Qi pipeline 21.
As the preferred embodiment of the present invention, the high-pureness carbon dioxide air source 14 has with extraneous high pressure etc.
The normally closed connector of the high-pureness carbon dioxide working medium storage tank of grade and concentration not less than 99.9%, when high-pureness carbon dioxide air source
It, can be by opening normally closed connector, from the overcritical titanium dioxide using dry gas seals when 14 air pressure is less than a certain setting value
High-purity two is supplemented at the high-pureness carbon dioxide working medium storage tank of high pressure grade outside carbon turbomachine working medium displacement apparatus
Carbonoxide working medium.
As the preferred embodiment of the present invention, the accident conditions empty the accident conditions in 20 outside of pipeline shut-off valve
The other end outlet for emptying pipeline 19, in the supercritical carbon dioxide turbomachine working medium displacement apparatus using dry gas seals
On the outside of the workshop at place.
The working medium of supercritical carbon dioxide turbomachine working medium displacement apparatus of the present invention using dry gas seals is set
Method is changed, is included the following steps：
Step 1, the supercritical carbon dioxide circulatory system are assigned carries out working medium displacement to supercritical carbon dioxide turbomachine
After order, import segment pipe or outlet section pipeline valve 8, outlet segment pipe or inducer pipeline valve 10 and accident conditions are arranged
Blank pipe road shut-off valve 20 is set as long off state；
Step 2 closes high-pressure side dry gas seals pipeline tune valve 17, low-pressure end dry gas seals pipeline tune valve 18 and main blowdown pipe
Road tune valve 22 opens suction channel shut-off valve 12, by vacuum pump 13 to supercritical carbon dioxide turbomachine inside and inlet and outlet
Gas in the connected space of pipeline is evacuated, until when the air pressure in the connected space is to a certain setting pressure P, is closed and is taken out
Suction pipe road shut-off valve 12 and vacuum pump 13；
Step 3 opens high-pressure side dry gas seals pipeline tune valve 17, low-pressure end dry gas seals pipeline tune valve 18 and main blowdown pipe
Road tune valve 22, high-pureness carbon dioxide air source 14 are dry by main tonifying Qi pipeline 21, high-pressure side dry gas seals pipeline 15 and low-pressure end
Hermetic seal pipeline 16 carries out tonifying Qi into the connected space of supercritical carbon dioxide turbomachine inside and inlet and outlet pipeline, until
After air pressure to atmospheric pressure P0 in the connected space, high-pressure side dry gas seals pipeline tune valve 17, low-pressure end dry gas seals are closed
Pipeline tune valve 18 and main tonifying Qi pipeline tune valve 22；
Step 4 keeps high-pressure side dry gas seals pipeline tune valve 17, low-pressure end dry gas seals pipeline tune valve 18, main blowdown pipe
Road tune valve 22 and suction channel shut-off valve 12 are closed, and make supercritical carbon dioxide turbomachine inside and inlet/outlet pipe
The connected space time of repose in road reaches the set time T of setting, makes foreign gas molecule in the intermolecular expansion of carbon dioxide gas
It dissipates；
Step 5 repeats step 2 to the operation of step 4 and reaches setting times N, makes in supercritical carbon dioxide turbomachine
The concentration of the connected space of portion and inlet and outlet pipeline reaches system requirements purity C.
As the preferred embodiment of the present invention, the connection of supercritical carbon dioxide turbomachine inside and inlet and outlet pipeline
When gas in space is evacuated, the difference of the atmospheric pressure P0 and setting pressure P in the connected space is less than dry gas seals 3
The peak suction that can bear when static.
As the preferred embodiment of the present invention, the setting times N of supercritical carbon dioxide turbomachine working medium suction is set
Constant-pressure P, system requirements purity C, atmospheric pressure P0 meet calculation formula 73.9- (P/P0)N≥73.9C。
As the preferred embodiment of the present invention, the connection of supercritical carbon dioxide turbomachine inside and inlet and outlet pipeline
Space stood the set time T set as 2 to 5 minutes.
Technical scheme of the present invention is not limited to the limitation of above-mentioned specific embodiment, every to do according to the technique and scheme of the present invention
The technology deformation gone out, each falls within protection scope of the present invention.
Claims (7)
1. using the supercritical carbon dioxide turbomachine working medium displacement apparatus of dry gas seals, it is characterised in that：Including overcritical
Carbon dioxide turbomachine stator (1), dry gas seals (3), stator blade (4), moves supercritical carbon dioxide turbomachine main shaft (2)
Leaf (5), spring bearing (6), import segment pipe or outlet segment pipe (7), import segment pipe or outlet section pipeline valve (8) go out
Mouth segment pipe or import segment pipe (9), outlet segment pipe or inducer pipeline valve (10), aspiration (11), suction channel
Shut-off valve (12), vacuum pump (13), accident conditions emptying pipeline (19), accident conditions emptying pipeline shut-off valve (20), high-purity
Carbon dioxide air source (14), high-pressure side dry gas seals pipeline (15), low-pressure end dry gas seals pipeline (16), main tonifying Qi pipeline
(21), high-pressure side dry gas seals pipeline tune valve (17), low-pressure end dry gas seals pipeline tune valve (18) and main tonifying Qi pipeline tune valve
(22)；Wherein, import segment pipe or outlet segment pipe (7) and export segment pipe or import segment pipe (9) with overcritical dioxy
Change carbon turbomachine stator (1) to be connected, import segment pipe or outlet section pipeline valve (8) are located at import segment pipe or outlet section pipe
On road (7), exports segment pipe or inducer pipeline valve (10) is located on outlet segment pipe or import segment pipe (9), face super
There are two spring bearing (6), stator blade (4) and supercritical carbon dioxides respectively at the both ends of boundary's carbon dioxide turbomachine main shaft (2)
Turbomachine stator (1) is connected, and movable vane (5) is connected with supercritical carbon dioxide turbomachine main shaft (2), in two spring bearings
(6) dry gas seals (3) are provided on the outside of inside and stator blade (4), movable vane (5), it is close that dry gas seals (3) are divided into high-pressure side dry gas
Envelope and low-pressure side dry gas seals, high-pressure side dry gas seals and low-pressure side dry gas seals pass through high-pressure side dry gas seals pipeline respectively
(15) it is connect with high-pureness carbon dioxide air source (14) with low-pressure end dry gas seals pipeline (16), in high-pressure side dry gas seals pipeline
(15) and on low-pressure end dry gas seals pipeline (16) it is respectively arranged with high-pressure side dry gas seals pipeline tune valve (17) and low-pressure end is dry
Hermetic seal pipeline tune valve (18), on outlet segment pipe or import segment pipe (9) and outlet segment pipe or inducer pipeline valve
The upstream or downstream of door (10) are provided with aspiration (11), and suction channel shut-off valve (12) is provided in aspiration (11),
Suction channel shut-off valve (12) downstream is provided with vacuum pump (13), in aspiration (11) and suction channel shut-off valve
(12) upstream is provided with accident conditions emptying pipeline (19), and accident conditions emptying is provided on accident conditions emptying pipeline (19)
Pipeline shut-off valve (20), in aspiration (11) and the upstream of accident conditions emptying pipeline (19) is provided with main tonifying Qi pipeline
(21), the other end of main tonifying Qi pipeline (21) is connected to high-pureness carbon dioxide air source (14), is arranged on main tonifying Qi pipeline (21)
There is main tonifying Qi pipeline tune valve (22).
2. the supercritical carbon dioxide turbomachine working medium displacement apparatus according to claim 1 using dry gas seals,
It is characterized in that：The high-pureness carbon dioxide air source (14) has with extraneous high pressure grade and concentration not less than 99.9%
The normally closed connector of high-pureness carbon dioxide working medium storage tank, when the air pressure of high-pureness carbon dioxide air source (14) is less than setting value
When, by opening normally closed connector, outside the supercritical carbon dioxide turbomachine working medium displacement apparatus using dry gas seals
High pressure grade high-pureness carbon dioxide working medium storage tank at supplement high-pureness carbon dioxide working medium.
3. the supercritical carbon dioxide turbomachine working medium displacement apparatus according to claim 1 using dry gas seals,
It is characterized in that：Another the bringing out of accident conditions emptying pipeline (19) on the outside of the accident conditions emptying pipeline shut-off valve (20)
Mouth is on the outside of the workshop where the supercritical carbon dioxide turbomachine working medium displacement apparatus using dry gas seals.
4. claims 1 to 3 any one of them is using the supercritical carbon dioxide turbomachine working medium displacement dress of dry gas seals
The working medium method of replacing set, it is characterised in that：Include the following steps：
Step 1, the supercritical carbon dioxide circulatory system are assigned carries out working medium displacement order to supercritical carbon dioxide turbomachine
Afterwards, import segment pipe or outlet section pipeline valve (8), outlet segment pipe or inducer pipeline valve (10) and accident conditions are arranged
Blank pipe road shut-off valve (20) is set as long off state；
Step 2 closes high-pressure side dry gas seals pipeline tune valve (17), low-pressure end dry gas seals pipeline tune valve (18) and main blowdown pipe
Road tune valve (22) opens suction channel shut-off valve (12), by vacuum pump (13) to inside supercritical carbon dioxide turbomachine and
The gas imported and exported in the connected space of pipeline is evacuated, until when the air pressure in the connected space is to a certain setting pressure P,
Close suction channel shut-off valve (12) and vacuum pump (13)；
Step 3 opens high-pressure side dry gas seals pipeline tune valve (17), low-pressure end dry gas seals pipeline tune valve (18) and main blowdown pipe
Road tune valve (22), high-pureness carbon dioxide air source (14) by main tonifying Qi pipeline (21), high-pressure side dry gas seals pipeline (15) and
Low-pressure end dry gas seals pipeline (16) to inside supercritical carbon dioxide turbomachine and in the connected space of inlet and outlet pipeline into
Row tonifying Qi closes high-pressure side dry gas seals pipeline tune valve (17), low until after air pressure to atmospheric pressure P0 in the connected space
Pressure side dry gas seals pipeline tune valve (18) and main tonifying Qi pipeline tune valve (22)；
Step 4 keeps high-pressure side dry gas seals pipeline tune valve (17), low-pressure end dry gas seals pipeline tune valve (18), main blowdown pipe
Road tune valve (22) and suction channel shut-off valve (12) are closed, and are made inside supercritical carbon dioxide turbomachine and are passed in and out
The connected space time of repose of mouth pipeline reaches the set time T of setting, makes foreign gas molecule in carbon dioxide gas molecule
Between spread；
Step 5 repeats step 2 to the operation of step 4 and reaches setting times N, make inside supercritical carbon dioxide turbomachine and
The concentration for importing and exporting the connected space of pipeline reaches system requirements purity C.
5. working medium method of replacing according to claim 4, it is characterised in that：Inside supercritical carbon dioxide turbomachine and
When gas in the connected space of inlet and outlet pipeline is evacuated, atmospheric pressure P0 is with the setting pressure P's in the connected space
Difference is less than the peak suction that can bear when dry gas seals (3) static state.
6. working medium method of replacing according to claim 4, it is characterised in that：Supercritical carbon dioxide turbomachine working medium is taken out
The setting times N of suction, setting pressure P, system requirements purity C, atmospheric pressure P0 meet calculation formula 73.9- (P/P0)N≥
73.9C。
7. working medium method of replacing according to claim 4, it is characterised in that：Inside supercritical carbon dioxide turbomachine and
The connected space of inlet and outlet pipeline stood the set time T set as 2 to 5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111062124A (en) * | 2019-12-05 | 2020-04-24 | 西安交通大学 | Similar modeling method for supercritical carbon dioxide compressor test |
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