WO2022230766A1 - ガス処理システム - Google Patents
ガス処理システム Download PDFInfo
- Publication number
- WO2022230766A1 WO2022230766A1 PCT/JP2022/018537 JP2022018537W WO2022230766A1 WO 2022230766 A1 WO2022230766 A1 WO 2022230766A1 JP 2022018537 W JP2022018537 W JP 2022018537W WO 2022230766 A1 WO2022230766 A1 WO 2022230766A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- way valve
- pressure
- line
- gate valve
- Prior art date
Links
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 38
- 230000008859 change Effects 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims description 10
- 239000007789 gas Substances 0.000 description 165
- 238000000034 method Methods 0.000 description 9
- 230000005856 abnormality Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000001784 detoxification Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/4412—Details relating to the exhausts, e.g. pumps, filters, scrubbers, particle traps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
Definitions
- the present invention relates to gas processing systems.
- Vacuum pumps are used to create a high degree of vacuum inside these devices.
- the exhaust gas discharged from the vacuum pump contains detoxified gases that need to be detoxified. Therefore, the exhaust gas is sent through the exhaust line to the abatement device and is abated.
- a three-way valve may be arranged in the exhaust line, and the main exhaust line and the bypass line may branch from the three-way valve (see Patent Document 1, for example).
- An abatement device is arranged downstream of the main exhaust line, and an emergency abatement device is connected to a downstream side of the bypass line for temporarily abatement processing when an abnormality occurs in the abatement device.
- the exhaust gas flowing through the exhaust line is not sent to the bypass line by the three-way valve, but is sent through the main exhaust line to the abatement device and is abated.
- the three-way valve is switched so that the exhaust gas is sent to the emergency abatement device through the bypass line instead of the main exhaust line, and is simply ablated.
- the exhaust line and three-way valve are set to a high temperature so that the abatement gas does not solidify and accumulate inside. That is, by increasing the temperature of the target abatement gas, the state of the abatement gas is positioned on the gas phase side of the vapor pressure curve, thereby suppressing the solidification of the abatement gas.
- the sealing performance of the three-way valve may deteriorate and internal leaks may occur.
- the three-way valve is open to the main exhaust line side in order to detoxify the detoxifying gas, a phenomenon occurs in which the detoxifying gas flows into the bypass line.
- the emergency abatement equipment connected to the bypass line basically does not have high abatement performance, so if a large amount of abatement gas flows in, there is a possibility that it cannot be treated.
- the present invention has been made to solve the above-described problems, and is capable of accurately detecting an internal leak in a three-way valve that branches an exhaust gas flow path, and also detecting leakage of exhaust gas from the three-way valve to a bypass line. It is an object of the present invention to provide a controllable gas treatment system.
- the bypass line includes a gate valve, a gas introduction pipe that introduces a second gas between the three-way valve and the gate valve, and detects pressure between the three-way valve and the gate valve.
- the gate valve when the three-way valve serves as exhaust to the main exhaust line, the gate valve is closed to form a closed flow path between the gate valve and the three-way valve, and An internal leak in the three-way valve can be detected from a change in pressure detected by the pressure gauge while the second gas is introduced into the closed flow path from the gas introduction pipe. .
- the gas processing system configured as described above can accurately detect the internal leak in the three-way valve from the change in the pressure of the closed flow path detected by the pressure gauge, and the second gas introduced into the closed flow path can be detected.
- the gas can suppress leakage of exhaust gas into the bypass line.
- the gas introduction pipe has a second sluice valve, and after the second gas is introduced from the gas introduction pipe, the second sluice valve is closed to maintain the pressure in the closed flow path. and an internal leak at the three-way valve may be detectable from a change in pressure within the closed flow path detected by the pressure gauge. Since the gas processing system can maintain the pressure in the closed channel by closing the second gate valve, it is easier to detect the pressure change in the closed channel caused by the internal leak, and the internal leak at the three-way valve can be detected accurately. detectable.
- the second gas may be continuously introduced from the gas introduction pipe in a state in which the internal leak in the three-way valve can be detected.
- the gas processing system can prevent the pressure in the closed channel from decreasing with time, and can appropriately maintain a state in which changes in the pressure in the closed channel can be detected even after the passage of time.
- the second gas may be introduced from the gas introduction pipe only for a predetermined time while the internal leak in the three-way valve is detectable. This allows the gas handling system to detect changes in closed channel pressure caused by internal leaks, as the pressure in the closed channel does not need to be maintained continuously, but only for a limited time. This makes it easier to detect internal leaks in the three-way valve with high accuracy.
- the gas introduction pipe may have a throttle mechanism for adjusting the flow rate of the second gas.
- the gas processing system is such that the flow rate of the second gas is restricted to a small amount by the throttling mechanism. For this reason, the time change of the pressure in the closed flow path caused by the inflow of the second gas becomes gentle. Therefore, the pressure change in the closed channel caused by the leak in the three-way valve is less likely to be submerged in the pressure change in the closed channel caused by the inflow of the second gas, making it easier to identify. Therefore, the gas processing system can detect internal leaks in the three-way valve with high accuracy.
- the gate valve may be a normally open valve. As a result, when a problem arises in the structure for operating the gate valve, the gate valve is automatically opened, and the gas flowing through the bypass line is urgently released to equipment other than the gas treatment apparatus. Therefore, the gas processing system can ensure high safety.
- FIG. 4 is a configuration diagram when an internal leak occurs in the three-way valve of the gas processing system according to the present embodiment; It is a block diagram when trouble arises in the abatement device of the gas processing system which concerns on this embodiment. It is a block diagram of the modification of the gas processing system which concerns on this embodiment.
- a gas processing system 10 as shown in FIG. , a main exhaust line 22 arranged downstream of the upstream exhaust line 21, a three-way valve 23 arranged between the upstream exhaust line 21 and the main exhaust line 22, and a three-way valve 23 arranged downstream of the main exhaust line 22. and a harm abatement device 40.
- the gas processing system 10 further comprises a bypass line 30 connected to the three-way valve 23 and an emergency abatement device 50 arranged downstream of the bypass line 30 .
- the upstream exhaust line 21, the main exhaust line 22 and the bypass line 30 have a piping structure that forms a flow path through which the exhaust gas flows.
- the upstream side exhaust line 21 is connected to, for example, a back pump 11 to which exhaust gas is sent from a vacuum pump, and exhaust gas is sent from the back pump 11 .
- a back pump 11 to which exhaust gas is sent from a vacuum pump, and exhaust gas is sent from the back pump 11 .
- the configuration arranged on the upstream side of the upstream exhaust line 21 is not limited to the back pump 11 .
- Exhaust gas flowing through the upstream exhaust line 21 contains detoxified gas that needs to be detoxified.
- the harm-removing gas is a highly volatile substance that sublimates when heated, such as ammonium chloride, but is not limited to this.
- a downstream end of the upstream exhaust line 21 is connected to a three-way valve 23 .
- the upstream end of the main exhaust line 22 is connected to the three-way valve 23 , and the downstream end of the main exhaust line 22 is connected to the abatement device 40 .
- At least one of the upstream exhaust line 21 and the main exhaust line 22 has a pipe heater 24 .
- the piping heater 24 heats at least one of the upstream exhaust line 21 and the main exhaust line 22 to prevent the abatement gas flowing inside the piping from accumulating in the piping.
- the set temperature of the piping heater 24 is appropriately set according to conditions such as the type and pressure of the abatement gas, and may be, for example, 200° C. or higher, but is not limited to this.
- the three-way valve 23 is connected to the upstream side exhaust line 21 , the main exhaust line 22 and the bypass line 30 .
- the three-way valve 23 can switch between a state in which the flow paths of the upstream exhaust line 21 and the main exhaust line 22 are communicated, and a state in which the flow paths of the upstream exhaust line 21 and the bypass line 30 are communicated.
- the switching operation of the three-way valve 23 is performed by an actuator operated by air pressure supplied from the air pressure supply source 12, for example. Note that the method of switching the three-way valve 23 is not limited to this, and may be performed by a hydraulic or electric actuator, for example.
- the detoxification device 40 is a gas treatment device that detoxifies the detoxification gas in order to prevent air pollution.
- the structure of the detoxifying device 40 is not particularly limited, but the detoxifying gas can be detoxified by, for example, a combustion method, a thermal decomposition method, a wet method, a catalytic method, a plasma decomposition method, an adsorption method, or the like.
- the gas treatment device to which the exhaust gas is transported may not be the abatement device 40 .
- the bypass line 30 is a first bypass line 31, a second bypass line 32, a gate valve 33, and a gas introduction pipe that introduces a second gas into the first bypass line 31 between the three-way valve 23 and the gate valve 33.
- 34 and a pressure gauge 35 for detecting the pressure between the three-way valve 23 and the gate valve 33 .
- the upstream end of the first bypass line 31 is connected to the three-way valve 23 , and the downstream end of the first bypass line 31 is connected to the gate valve 33 .
- the upstream end of the second bypass line 32 is connected to the gate valve 33 , and the downstream end of the second bypass line 32 is connected to the emergency abatement device 50 .
- the emergency abatement device 50 is a gas treatment device that detoxifies the abatement gas instead of the abatement device 40 when an abnormality occurs in the abatement device 40 .
- the emergency abatement device 50 is a gas treatment device with a simple structure that performs treatment mainly by dilution, and basically has low abatement performance.
- the gate valve 33 is a valve that can open and close the flow path between the first bypass line 31 and the second bypass line 32 .
- the opening/closing switching operation of the gate valve 33 is performed by an actuator operated by air pressure supplied from the air pressure supply source 12, for example, like the three-way valve 23.
- the switching method of the gate valve 33 is not limited to this, and may be performed by a hydraulic or electric actuator, for example.
- the gate valve 33 is opened and closed in synchronization with the three-way valve 23 . That is, when the upstream exhaust line 21 of the three-way valve 23 and the first bypass line 31 is opened, the gate valve 33 is opened, and when the upstream exhaust line 21 of the three-way valve 23 and the first bypass line 31 is closed. Then, the gate valve 33 is closed.
- the gate valve 33 is preferably a normally open valve that automatically opens when no force is applied to close the valve.
- the gate valve 33 is, for example, a spring return type valve that is automatically opened by the action of an internal spring.
- the gas introduction pipe 34 is a pipe that supplies the second gas to the bypass line 30 .
- the gas introduction pipe 34 includes a pressure regulator 36 for adjusting the pressure of the second gas supplied from the gas supply source 14, and a second gate valve arranged between the pressure regulator 36 and the first bypass line 31. 37.
- the second gas supplied from the gas supply source 14 is used to increase the pressure in the closed flow path C of the bypass line 30 closed by the three-way valve 23, the gate valve 33 and the second gate valve 37. be.
- the second gas supplied from the gas supply source 14 is preferably nitrogen gas, but is not particularly limited as long as it is an inert gas, and may be, for example, argon gas.
- the second gate valve 37 is a valve that can open and close the flow path between the pressure regulator 36 and the first bypass line 31 .
- the opening/closing switching operation of the second gate valve 37 is performed manually, but may be performed by a pneumatic, hydraulic, or electric actuator, for example.
- the pressure gauge 35 is connected to the pipe between the three-way valve 23 and the gate valve 33 of the bypass line 30 and closer to the first bypass line 31 than the second gate valve 37, and measures the pressure inside the bypass line 30. to detect That is, the pressure gauge 35 detects the pressure inside the closed flow path C of the bypass line 30 closed by the three-way valve 23 , the gate valve 33 and the second gate valve 37 . A pressure detection result by the pressure gauge 35 is used to detect an internal leak to the bypass line 30 in the three-way valve 23 .
- the pressure gauge 35 is connected to the gas introduction pipe 34 communicating with the first bypass line 31 in this embodiment, it may be connected to the first bypass line 31 .
- the pressure gauge 35 transmits a signal representing the detected result to the display device 13 .
- the display device 13 displays the pressure detection result received from the pressure gauge 35 so that the operator can visually recognize it.
- the three-way valve 23 allows the passages of the upstream exhaust line 21 and the main exhaust line 22 to communicate, and closes the passages of the upstream exhaust line 21 and the bypass line 30 .
- the gate valve 33 is closed.
- the second gate valve 37 is opened to supply the second gas from the gas supply source 14 to the closed flow path C of the bypass line 30 through the pressure regulator 36 .
- the operator closes the second gate valve 37 .
- the pressure of the closed flow path C of the bypass line 30 is maintained at the predetermined pressure P0.
- the pressure of the second gas supplied from the gas supply source 14 is about 10 kPa to 100 kPa
- the predetermined pressure P0 of the closed flow path C is set to about 1 kPa to 100 kPa.
- the worker heats at least one of the upstream side exhaust line 21 and the main exhaust line 22 with the piping heater 24 .
- the exhaust gas from the back pump 11 flows to the abatement device 40 through the upstream side exhaust line 21 and the main exhaust line 22 .
- the exhaust gas that has reached the abatement device 40 is subjected to a detoxification process and is released to the outside.
- the pressure of the exhaust gas flowing through the upstream side exhaust line 21 and the main exhaust line 22 is several kPa.
- the pressure P in the closed flow path C is higher than the pressure of the exhaust gas flowing through the upstream side exhaust line 21 and the main exhaust line 22 .
- the second gas inside the closed flow path C leaks through the three-way valve 23 to the main exhaust line 22, as shown in FIG. Since the leaking second gas is nitrogen gas, the effect on the gas processing system 10 is small.
- the pressure P in the closed channel C drops below the initially set predetermined pressure P0 (P ⁇ P0).
- the operator monitors the pressure P of the closed flow path C using the display device 13 and determines whether or not the three-way valve 23 is leaking. For example, when the pressure P of the closed flow path C becomes equal to or less than a preset threshold value lower than the predetermined pressure P0 (or less than the threshold value), the operator determines that an internal leak has occurred in the three-way valve 23. can.
- the gas treatment system 10 includes the main exhaust line 22 that guides the exhaust gas to the gas treatment device (abatement device 40) and equipment other than the abatement device 40 (emergency abatement device 50).
- an upstream exhaust line 21 that guides exhaust gas to the main exhaust line 22 and the bypass line 30;
- a gas treatment system 10 comprising a three-way valve 23 that can be switched to a gas that introduces a second gas between the gate valve 33 and between the three-way valve 23 and the gate valve 33 It has an introduction pipe 34 and a pressure gauge 35 that detects the pressure between the three-way valve 23 and the gate valve 33, and when the three-way valve 23 is exhausting to the main exhaust line 22, the gate valve 33 is closed.
- a closed flow path C is formed between the gate valve 33 and the three-way valve 23, and the second gas is introduced into the closed flow path C from the gas introduction pipe 34.
- the pressure detected by the pressure gauge 35 is An internal leak in the three-way valve 23 can be detected from the change in .
- the gas processing system 10 configured as described above can accurately detect an internal leak in the three-way valve 23 from changes in the pressure in the closed flow path C detected by the pressure gauge 35, and can introduce gas into the closed flow path C. Leakage of the exhaust gas to the bypass line 30 can be suppressed by the second gas.
- the pressure P in the closed flow path C is higher than the pressure of the exhaust gas flowing through the upstream side exhaust line 21 and the main exhaust line 22, the second gas inside the closed flow path C passes through the three-way valve 23. Since the second gas leaks to the main exhaust line 22 , leakage of the exhaust gas to the bypass line 30 can be more effectively suppressed.
- the gas introduction pipe 34 has a second gate valve 37, and after introducing the second gas from the gas introduction pipe 34, the second gate valve 37 is closed to reduce the pressure in the closed flow path C. can be maintained, and an internal leak in the three-way valve 23 can be detected by a change in the pressure inside the closed flow path C detected by the pressure gauge 35 . Since the gas processing system 10 can maintain the pressure in the closed channel C by closing the second gate valve 37, it becomes easier to detect changes in the pressure in the closed channel C caused by internal leaks. Accurate detection of internal leaks.
- the gate valve 33 is a normally open type valve. As a result, when a problem occurs in the structure that operates the gate valve 33, the gate valve 33 automatically opens, and the gas flowing through the bypass line 30 is directed to equipment other than the gas treatment device (emergency abatement device 50 in this embodiment). urgently released. Therefore, the gas processing system 10 can ensure high safety.
- the gas processing system 10 has a throttle mechanism 38 between the pressure regulator 36 of the bypass line 30 and the second gate valve 37 for adjusting the flow rate of the second gas. may be placed.
- the diaphragm mechanism 38 is an orifice plate.
- the orifice plate has, for example, a through hole with an inner diameter of about 1/4 inch, but the inner diameter of the through hole is not particularly limited.
- the configuration of the throttle mechanism 38 is not particularly limited as long as it can throttle the flow rate of passing gas, and may be, for example, a needle valve.
- the three-way valve 23 is connected to flow paths of the upstream exhaust line 21 and the main exhaust line 22 so that the upstream exhaust line 21 and the bypass line are connected.
- 30 is closed.
- the gate valve 33 is closed.
- the second gate valve 37 is opened to supply the second gas from the gas supply source 14 to the closed flow path C of the bypass line 30 through the pressure regulator 36 and throttle mechanism 38 .
- the pressure P in the closed flow path C is prevented from gradually decreasing with time, and the pressure P is maintained at the desired predetermined pressure P0.
- the exhaust gas from the back pump 11 is sent to the abatement device 40 through the upstream side exhaust line 21 and the main exhaust line 22 .
- the exhaust gas that has reached the abatement device 40 is subjected to a detoxification process and is released to the outside.
- the pressure P of the closed flow path C is higher than the pressure of the exhaust gas flowing through the upstream side exhaust line 21 and the main exhaust line 22 . Therefore, if an internal leak occurs in the seal of the three-way valve 23 , the second gas inside the closed flow path C leaks through the three-way valve 23 to the main exhaust line 22 .
- the pressure P in the closed channel C drops below the initially set predetermined pressure P0 (P ⁇ P0).
- the operator can monitor the pressure P of the closed flow path C using the display device 13 and compare the pressure P with a threshold value to determine whether or not there is a leak in the three-way valve 23 .
- the modified example of the gas processing system 10 continuously introduces the second gas through the gas introduction pipe 34 in a state where the internal leak in the three-way valve 23 can be detected.
- the gas processing system 10 can prevent the pressure P of the closed flow path C from decreasing with time. can be maintained at
- the gas introduction pipe 34 also has a throttle mechanism 38 that adjusts the flow rate of the second gas.
- the gas processing system 10 limits the flow rate of the second gas to a small amount by the throttle mechanism 38 . Therefore, the time change of the pressure in the closed flow path C caused by the inflow of the second gas becomes gentle. Therefore, the pressure change in the closed channel C caused by the internal leak in the three-way valve 23 is less likely to be submerged in the pressure change in the closed channel C caused by the inflow of the second gas, making it easier to identify. Therefore, the gas processing system 10 can detect an internal leak in the three-way valve 23 with high accuracy.
- the presence or absence of leakage from the three-way valve 23 is determined by the operator, but it may be determined by a control unit such as a computer having an arithmetic function.
- the control unit receives the pressure detection result from the pressure gauge 35 and compares the pressure P of the closed flow path C with a preset threshold value, thereby determining whether or not there is an internal leak in the three-way valve 23 .
- the second gas continues to be continuously introduced from the gas introduction pipe 34 in a state in which the internal leak in the three-way valve 23 can be detected.
- the second gas may be introduced through the gas introduction pipe 34 only for a predetermined period of time.
- the pressure P in the closed flow path C In order to detect a change in the pressure P in the closed flow path C caused by the internal leak in the three-way valve 23, it is necessary to keep the pressure P in the closed flow path C constant, but it is difficult to keep it constant. be. Furthermore, the low pressure P in the closed flow path C makes it more difficult to keep the pressure P constant.
- the gas processing system 10 periodically (for example, multiple times a day) closes the closed flow path C in order to make it possible to detect internal leaks in the three-way valve 23.
- the second gate valve 37 is opened so that the pressure P becomes the predetermined pressure P0, and the second gas for inspection is supplied from the gas supply source 14 to the closed flow path C through the pressure regulator 36 and the gas introduction pipe 34. to introduce That is, the gas processing system 10 does not need to continuously maintain the pressure P of the closed flow path C, and maintains the pressure P of the closed flow path C at the predetermined pressure P0 only for a limited short period of time during which the inspection is performed.
- the gas processing system 10 can easily detect changes in the pressure P in the closed flow path C caused by internal leaks, and can detect internal leaks in the three-way valve 23 with high accuracy. Therefore, the operator can monitor the pressure P of the closed flow path C using the display device 13 and compare the pressure P with the threshold value to determine the presence or absence of leakage of the three-way valve 23 with high accuracy.
- At least one of the periodically performed opening and closing of the second gate valve 37, the control of the adjustment by the pressure regulator 36, and the determination of the presence or absence of internal leakage of the three-way valve 23 is performed by a computer or the like having an arithmetic function. It may be done automatically by the controller.
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Abstract
Description
初めに、三方弁23により、上流側排気ライン21および主排気ライン22の流路を連通させて、上流側排気ライン21およびバイパスライン30の流路を閉じる。これに同期して、仕切弁33は閉じられる。次に、第2の仕切弁37を開き、ガス供給源14から第2のガスを、圧力調整器36を通してバイパスライン30の閉流路Cへ供給する。バイパスライン30の閉流路Cの圧力Pは、所定圧力P0に設定される(P=P0)。この後、作業者は、第2の仕切弁37を閉じる。これにより、バイパスライン30の閉流路Cの圧力は、所定圧力P0で維持される。一例として、ガス供給源14から供給される第2のガスの圧力は10kPaから100kPa程度であり、閉流路Cの所定圧力P0は1kPaから100kPa程度で設定される。
21 上流側排気ライン
22 主排気ライン
23 三方弁
30 バイパスライン
31 第1バイパスライン
32 第2バイパスライン
33 仕切弁
34 ガス導入管
35 圧力計
36 圧力調整器
37 第2の仕切弁
38 絞り機構
40 除害装置(ガス処理装置)
50 緊急除害装置(緊急ガス処理装置)
C 閉流路
Claims (6)
- 排気ガスをガス処理装置へ導く主排気ラインと、
前記ガス処理装置以外の設備へ前記排気ガスを導くバイパスラインと、
前記主排気ラインおよび前記バイパスラインへ前記排気ガスを導く上流側排気ラインと、
前記上流側排気ラインからの前記排気ガスの流れを前記主排気ラインまたは前記バイパスラインに切り替えることが可能な三方弁と、を備えたガス処理システムであって、
前記バイパスラインは、
仕切弁と、
前記三方弁および前記仕切弁の間へ第2のガスを導入するガス導入管と、
前記三方弁および前記仕切弁の間の圧力を検出する圧力計と、を有し、
前記三方弁が前記主排気ラインへの排気となっている場合、前記仕切弁を閉じて前記仕切弁と前記三方弁との間に閉流路を形成し、更に前記閉流路内に前記ガス導入管から前記第2のガスを導入した状態で、前記圧力計により検出される圧力の変化によって、前記三方弁における内部リークを検知可能であることを特徴とするガス処理システム。 - 前記ガス導入管は、第2の仕切弁を有し、
前記ガス導入管から前記第2のガスを導入した後、前記第2の仕切弁を閉じることで、前記閉流路内の圧力を維持でき、かつ前記圧力計により検出される前記閉流路内の圧力の変化によって、前記三方弁における内部リークを検知可能であることを特徴とする請求項1に記載のガス処理システム。 - 前記三方弁における内部リークを検知可能とした状態において、前記第2のガスを前記ガス導入管より連続的に導入し続けることを特徴とする請求項1に記載のガス処理システム。
- 前記三方弁における内部リークを検知可能とした状態とするために、前記第2のガスを前記ガス導入管より所定時間のみ導入することを特徴とする請求項1に記載のガス処理システム。
- 前記ガス導入管は、前記第2のガスの流量を調整する絞り機構を有することを特徴とする請求項1~4のいずれか1項に記載のガス処理システム。
- 前記仕切弁は、ノーマルオープン型の弁であることを特徴とする請求項1~5のいずれか1項に記載のガス処理システム。
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KR1020237033318A KR20240000464A (ko) | 2021-04-28 | 2022-04-22 | 가스 처리 시스템 |
IL307436A IL307436A (en) | 2021-04-28 | 2022-04-22 | gas treatment system |
EP22795679.4A EP4333024A1 (en) | 2021-04-28 | 2022-04-22 | Gas processing system |
CN202280027712.5A CN117178345A (zh) | 2021-04-28 | 2022-04-22 | 气体处理系统 |
US18/554,655 US20240191845A1 (en) | 2021-04-28 | 2022-04-22 | Gas treatment system |
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JP2022040144A JP7493543B2 (ja) | 2021-04-28 | 2022-03-15 | ガス処理システム |
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EP (1) | EP4333024A1 (ja) |
KR (1) | KR20240000464A (ja) |
IL (1) | IL307436A (ja) |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01225320A (ja) * | 1988-03-05 | 1989-09-08 | Tadahiro Omi | シリンダーキャビネット配管装置 |
JPH07148427A (ja) * | 1993-11-29 | 1995-06-13 | Teisan Kk | シリンダ付ガス供給装置 |
JP2003194654A (ja) * | 2001-12-26 | 2003-07-09 | Nippon Sanso Corp | 気密試験方法及びガス供給装置 |
JP2003257870A (ja) * | 2002-02-28 | 2003-09-12 | Nippon Sanso Corp | 半導体装置の製造システム及びガス供給方法 |
JP2012207888A (ja) * | 2011-03-30 | 2012-10-25 | Edwards Kk | 除害装置 |
JP2020025096A (ja) * | 2018-08-06 | 2020-02-13 | エドワーズ株式会社 | 除害システム、除害装置、およびシステム制御装置 |
-
2022
- 2022-04-21 TW TW111115250A patent/TW202244473A/zh unknown
- 2022-04-22 US US18/554,655 patent/US20240191845A1/en active Pending
- 2022-04-22 EP EP22795679.4A patent/EP4333024A1/en active Pending
- 2022-04-22 KR KR1020237033318A patent/KR20240000464A/ko unknown
- 2022-04-22 WO PCT/JP2022/018537 patent/WO2022230766A1/ja active Application Filing
- 2022-04-22 IL IL307436A patent/IL307436A/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01225320A (ja) * | 1988-03-05 | 1989-09-08 | Tadahiro Omi | シリンダーキャビネット配管装置 |
JPH07148427A (ja) * | 1993-11-29 | 1995-06-13 | Teisan Kk | シリンダ付ガス供給装置 |
JP2003194654A (ja) * | 2001-12-26 | 2003-07-09 | Nippon Sanso Corp | 気密試験方法及びガス供給装置 |
JP2003257870A (ja) * | 2002-02-28 | 2003-09-12 | Nippon Sanso Corp | 半導体装置の製造システム及びガス供給方法 |
JP2012207888A (ja) * | 2011-03-30 | 2012-10-25 | Edwards Kk | 除害装置 |
JP2020025096A (ja) * | 2018-08-06 | 2020-02-13 | エドワーズ株式会社 | 除害システム、除害装置、およびシステム制御装置 |
Also Published As
Publication number | Publication date |
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TW202244473A (zh) | 2022-11-16 |
EP4333024A1 (en) | 2024-03-06 |
US20240191845A1 (en) | 2024-06-13 |
IL307436A (en) | 2023-12-01 |
KR20240000464A (ko) | 2024-01-02 |
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