CN208997711U - A kind of generator hydrogen dryer pneumatic operated valve control compressed air source unit - Google Patents
A kind of generator hydrogen dryer pneumatic operated valve control compressed air source unit Download PDFInfo
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- CN208997711U CN208997711U CN201821356078.7U CN201821356078U CN208997711U CN 208997711 U CN208997711 U CN 208997711U CN 201821356078 U CN201821356078 U CN 201821356078U CN 208997711 U CN208997711 U CN 208997711U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/45—Hydrogen technologies in production processes
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Abstract
The utility model belongs to power station hydrogen dryer operation field, and in particular to a kind of generator hydrogen dryer pneumatic operated valve control compressed air source unit；Gas source is controlled for steady hydrogen drier pneumatic operated valve, it is ensured that hydrogen dryer reliability service；It include: that surge tank side is connected with non-return valve, shut-off valve B, automatic pressure reducing valve and shut-off valve A in turn from bottom to up；The shut-off valve A is connected with low-pressure nitrogen main pipe, and manually-operated gate A, manually-operated gate B and manually-operated gate C are connected in the low-pressure nitrogen main pipe；The surge tank upper end is also respectively connected with manually-operated gate D, safety valve and shutoff valve C, and surge tank lower end is connected with drain valve A and drain valve B；The shutoff valve C is also connected with shut-off valve valve D and manually adjusts valve；Described manually adjust is connected with operated pneumatic valve A, operated pneumatic valve B, operated pneumatic valve C, operated pneumatic valve D and operated pneumatic valve E below valve side by side.
Description
Technical field
The utility model belongs to power station hydrogen dryer operation field, and in particular to a kind of generator hydrogen dryer is pneumatic
Valve controls compressed air source unit.
Background technique
Respectively there are 5 pneumatic control valves, regulation in the electric generator hydrogen drier of certain two unit of nuclear power station first stage of the project
Provide that the control pressure of this kind of valve cannot be below 0.3Mpa, otherwise pneumatic operated valve will be unable to work normally.Original design pneumatic operated valve
Control gas source is taken from the main air pipeline of steam turbine workshop, this pipeline is in design not as dedicated control gas source pipe
Line, therefore it is constant within a certain range not can guarantee its pressure.When the biggish user's gas supply of gas consumption on main air pipeline
When, it will lead to the line pressure and sharply decline, once occurred sharply to decline because of the compressed air hose line pressure, and made No. 1 generator
Pneumatic operated valve is automatically closed in hydrogen drying unit, and hydrogen dryer is caused to protect stoppage in transit event.Therefore it needs for above-mentioned design
A kind of device for the control gas source pressure stabilizing of generator hydrogen dryer pneumatic operated valve of faultiness design.
Summary of the invention
The utility model aim is to provide a kind of generator hydrogen dryer pneumatic operated valve in view of the above shortcomings of the prior art
Compressed air source unit is controlled, controls gas source for steady hydrogen drier pneumatic operated valve, it is ensured that hydrogen dryer reliability service.
The technical solution of the utility model is:
A kind of generator hydrogen dryer pneumatic operated valve control compressed air source unit, comprising: surge tank side successively connects from bottom to up
It is connected to non-return valve, shut-off valve B, automatic pressure reducing valve and shut-off valve A；The shut-off valve A is connected with low-pressure nitrogen main pipe, the low pressure
Manually-operated gate A, manually-operated gate B and manually-operated gate C are connected in nitrogen main pipe；The surge tank upper end is also respectively connected with hand-operated valve
Door D, safety valve and shutoff valve C, surge tank lower end are connected with drain valve A and drain valve B；The shutoff valve C is also connected with
Shut-off valve valve D and manually adjust valve；It is described manually adjust be connected with below valve side by side operated pneumatic valve A, operated pneumatic valve B,
Operated pneumatic valve C, operated pneumatic valve D and operated pneumatic valve E.
Maximum working pressure (MWP) 0.98MPa before the valve of pressure reducing valve as described above, maximum working pressure (MWP) 0.8MPa after valve.
Nitrogen operating pressure is 0.8MPa in vacuum tank as described above, and the safety valve jumping up pressure is 0.87MPa；Buffering
Nitrogen in tank by shutoff valve C, shut-off valve valve D and manually adjusts valve to pneumatic operated valve offer control gas source.
The pressure of regulating valve control pneumatic operated valve gas source as described above is stablized in 0.3MPa；The drain valve A and drain valve B are
The drain valve of surge tank, the drain tank period of the day from 11 p.m. to 1 a.m uses when being periodically hydrophobic and maintenance.
As described above operated pneumatic valve A, operated pneumatic valve B, operated pneumatic valve C and operated pneumatic valve D combined running, operated pneumatic valve A and
Operated pneumatic valve D is one group, and operated pneumatic valve B and operated pneumatic valve C are one group, and normal operation is to switch one group in 30 hours, guarantees operation
Shi Yizhi has one group to be in continuous duty.
The utility model has the following beneficial effects:
1. being provided with stable-pressure device, it can be ensured that pneumatic operated valve bleed pressure is stablized, it can be ensured that hydrogen dryer works normally, and mentions
High equipment dependability；
2. stable-pressure device is provided with, even if can also fill by pressure stabilizing when maintenance is isolated in low-pressure nitrogen primary air pipeline in short-term
The gas for setting interior retention provides gas source to pneumatic operated valve, it is ensured that hydrogen dryer reliability service improves the flexibility of the method for operation；
3. control gas source is changed to low-pressure nitrogen by compressed air, pneumatic operated valve control gas source and working gas can be effectively prevent
Hydrogen mixes the generation for leading to the quick-fried event of hydrogen, improves the safety of equipment operation.
The utility model patent successfully solves generator hydrogen dryer pneumatic operated valve control bleed pressure instability problem,
It avoids control gas source and the quick-fried potential risk of hydrogen occurs for the hydrogen mixing that works, ensure that the system reliability of operation, be machine
Group provides and safely and steadily runs environment.
Detailed description of the invention
Fig. 1: being a kind of for the control gas source pressure stabilizing of generator hydrogen dryer pneumatic operated valve designed by the utility model
Apparatus structure schematic diagram；
Wherein, 1- manually-operated gate A；2- manually-operated gate B；3- manually-operated gate C；4- shut-off valve A；5- automatic pressure reducing valve；6- is cut
Only valve B；7- non-return valve；8- manually-operated gate D；9- safety valve；10- shutoff valve C；11- surge tank；12- drain valve A；13- is hydrophobic
Valve B；14- shut-off valve valve D；15- manually adjusts valve；16- operated pneumatic valve A；17- operated pneumatic valve B；18- operated pneumatic valve C；19-
Operated pneumatic valve D；20- operated pneumatic valve E.
Specific embodiment
The utility model technology is described further below:
A kind of generator hydrogen dryer pneumatic operated valve controls compressed air source unit, comprising: 11 side of surge tank is from bottom to up successively
It is connected with non-return valve 7, shut-off valve B6, automatic pressure reducing valve 5 and shut-off valve A4；The shut-off valve A4 is connected with low-pressure nitrogen main pipe,
Manually-operated gate A1, manually-operated gate B2 and manually-operated gate C3 are connected in the low-pressure nitrogen main pipe；11 upper end of surge tank is also
It is separately connected manually-operated gate D8, safety valve 9 and shutoff valve C10,11 lower end of surge tank is connected with drain valve A12 and drain valve
B13；The shutoff valve C10 is also connected with shut-off valve valve D14 and manually adjusts valve 15；It is described to manually adjust under valve 15
Side is connected with operated pneumatic valve A16, operated pneumatic valve B17, operated pneumatic valve C18, operated pneumatic valve D19 and operated pneumatic valve E20 side by side.
Maximum working pressure (MWP) 0.98MPa before the valve of the pressure reducing valve 5, maximum working pressure (MWP) 0.8MPa after valve.
Nitrogen operating pressure is 0.8MPa in the vacuum tank 11, and 9 release pressure of safety valve is 0.87MPa；Buffering
Nitrogen in tank 11 by shutoff valve C10, shut-off valve valve D14 and manually adjusts valve 15 to pneumatic operated valve offer control gas
Source.
The pressure that the regulating valve 15 controls pneumatic operated valve gas source is stablized in 0.3MPa；The drain valve A12 and drain valve B13
For the drain valve of surge tank 11, the drain tank period of the day from 11 p.m. to 1 a.m is used when being periodically hydrophobic and maintenance.
The operated pneumatic valve A16, operated pneumatic valve B17, operated pneumatic valve C18 and operated pneumatic valve D19 combined running, operated pneumatic valve
A16 and operated pneumatic valve D19 is one group, and operated pneumatic valve B17 and operated pneumatic valve C18 are one group, and normal operation is switching one in 30 hours
Group guarantees have to be in a continuous duty when operation always.
A kind of control method of generator hydrogen dryer pneumatic operated valve control compressed air source unit as described above, including it is control as follows
Step:
Step 1: the tolerance of two holding continuous services is calculated；
1) buffer tank volume calculates
V=QstP0/(P1-P2)………………(1)
V-tank volume, m in formula3；
Qs- compressed air source unit supplies design capacity m3/min；
P1- routine operating pressure, kPa (A)；
P2- minimum submitting pressure, kPa (A)；
P0- atmospheric pressure, usual P0=101.33, kPa (A)；
T-retention time, minute min；
2QsNumerical value calculates
Qs=Qc[2+0.1~0.3]/1.54 ... ... ... (2)
Qc: all kinds of instrument gas consumption summations, Nm3/h；
0.1~0.3: gas transmission pipeline net work system reveals coefficient；
Separate unit instrument air consumption are as follows: 1~2Nm3/h；
Considered according to known conditions the design by the air consumption of four pneumatic operated valves
The air consumption of four pneumatic operated valves is maximized are as follows: Qc=8Nm3/ h=0.1333Nm3/min；
Qs=Qc[2+ (0.1~0.3)]/1.54=0.2Nm3/min
Routine operating pressure: P1=800kPa (A), minimum submitting pressure: P2=400kPa (A)；
Without particular/special requirement, the retention time of gas source tank are as follows: 5~20min is maximized 20min；
The volume of gas storage tank V=Q calculated according to the above technical requirementsstP0/(P1-P2)=1m3。
Step 2: the low-pressure nitrogen main pipe before entering generator takes nitrogen, and nitrogen operating pressure is in vacuum tank 11
0.8MPa, nitrogen gas tank are provided with safety valve 9, release pressure 0.87MPa；Nitrogen in surge tank 11 passes through shutoff valve C10, cuts
It only valve valve D14 and manually adjusts valve 15 and provides control gas source to pneumatic operated valve, pass through regulating valve 15 and control pneumatic operated valve gas source
Pressure is stable 0.3MPa.
Volume of gas storage tank V is calculated according to above formula 1 and 2；When normal operation, pass through the manual tune on surge tank 11
Section valve 15 ensures that hydrogen dryer pneumatic operated valve control bleed pressure is constant, due to having 1m in surge tank 113Low-pressure nitrogen, even if working as
Low-pressure nitrogen main pipe rapid decompression, is also ensured hydrogen dryer continuous work 20 minutes.
The utility model is pneumatic to 5 in the generator hydrogen dryer of two units during certain nuclear plant major overhaul
The control gas source of valve is transformed, and gas source is changed to low-pressure nitrogen by compressed air, and control flue in original pneumatic operated valve
It installs stable-pressure device on line additional, realizes the constant requirement of pneumatic operated valve control bleed pressure.By calculating, the volume of stable-pressure device is 1
Cubic meter, 0.8 megapascal of operating pressure, 0.88 megapascal of design pressure, material are carbon steel, and the operating pressure of safety valve is 0.87 million
Pressure reduction to 0.3Mpa is controlled gas source for pneumatic operated valve by pressure reducing valve and used by pa.By installing stable-pressure device, generator hydrogen additional
The pneumatic operated valve control pressure of gas dryer can be effectively stable in 0.3MPa, and after using the stable-pressure device, the hydrogen of generator is dry
Dry device pneumatic operated valve the operation is stable did not occurred again because of the event that supply pressure fluctation causes equipment protection deactivated.
The utility model is explained in detail above in conjunction with embodiment, but the utility model is not limited to above-mentioned implementation
Example, within the knowledge of a person skilled in the art, can also be in the premise for not departing from the utility model aims
It is lower that various changes can be made.The content being not described in detail in the utility model can use the prior art.
Claims (5)
1. a kind of generator hydrogen dryer pneumatic operated valve controls compressed air source unit characterized by comprising surge tank (11) side from
Under supreme be connected with non-return valve (7), shut-off valve B (6), automatic pressure reducing valve (5) and shut-off valve A (4) in turn；The shut-off valve A (4)
It is connected with low-pressure nitrogen main pipe, manually-operated gate A (1), manually-operated gate B (2) and hand-operated valve are connected in the low-pressure nitrogen main pipe
Door C (3)；Surge tank (11) upper end is also respectively connected with manually-operated gate D (8), safety valve (9) and shutoff valve C (10), buffering
Tank (11) lower end is connected with drain valve A (12) and drain valve B (13)；The shutoff valve C (10) is also connected with shut-off valve valve D
(14) it and manually adjusts valve (15)；Described manually adjust is connected with operated pneumatic valve A (16), pneumatic operated valve below valve (15) side by side
Door B (17), operated pneumatic valve C (18), operated pneumatic valve D (19) and operated pneumatic valve E (20).
2. a kind of generator hydrogen dryer pneumatic operated valve as described in claim 1 controls compressed air source unit, it is characterised in that: described
Maximum working pressure (MWP) 0.98MPa before the valve of pressure reducing valve (5), maximum working pressure (MWP) 0.8MPa after valve.
3. a kind of generator hydrogen dryer pneumatic operated valve as claimed in claim 2 controls compressed air source unit, it is characterised in that: buffering
The interior nitrogen operating pressure of tank (11) is 0.8MPa, and safety valve (9) release pressure is 0.87MPa；Nitrogen in surge tank (11)
Gas is by shutoff valve C (10), shut-off valve valve D (14) and manually adjusts valve (15) to pneumatic operated valve offer control gas source.
4. a kind of generator hydrogen dryer pneumatic operated valve as claimed in claim 3 controls compressed air source unit, it is characterised in that: described
The pressure for manually adjusting valve (15) control pneumatic operated valve gas source is stablized in 0.3MPa；The drain valve A (12) and drain valve B (13)
For the drain valve of surge tank (11), the drain tank period of the day from 11 p.m. to 1 a.m is used when being periodically hydrophobic and maintenance.
5. a kind of generator hydrogen dryer pneumatic operated valve as claimed in claim 4 controls compressed air source unit, it is characterised in that: described
Operated pneumatic valve A (16), operated pneumatic valve B (17), operated pneumatic valve C (18) and operated pneumatic valve D (19) combined running, operated pneumatic valve A
(16) and operated pneumatic valve D (19) is one group, and operated pneumatic valve B (17) and operated pneumatic valve C (18) are one group, and normal operation is 30 hours
Switch one group, guarantees there is to be in a continuous duty when operation always.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821356078.7U CN208997711U (en) | 2018-08-22 | 2018-08-22 | A kind of generator hydrogen dryer pneumatic operated valve control compressed air source unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821356078.7U CN208997711U (en) | 2018-08-22 | 2018-08-22 | A kind of generator hydrogen dryer pneumatic operated valve control compressed air source unit |
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| CN208997711U true CN208997711U (en) | 2019-06-18 |
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| CN201821356078.7U Active CN208997711U (en) | 2018-08-22 | 2018-08-22 | A kind of generator hydrogen dryer pneumatic operated valve control compressed air source unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108870078A (en) * | 2018-08-22 | 2018-11-23 | 江苏核电有限公司 | A kind of generator hydrogen dryer pneumatic operated valve control compressed air source unit and its control method |
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2018
- 2018-08-22 CN CN201821356078.7U patent/CN208997711U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108870078A (en) * | 2018-08-22 | 2018-11-23 | 江苏核电有限公司 | A kind of generator hydrogen dryer pneumatic operated valve control compressed air source unit and its control method |
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