The present invention pertains to an impeller and a pump. Impeller (2) comprises: a shaft insertion hole (50); a fastening hole (51) having a smaller diameter than the shaft insertion hole (50); and a sleeve insertion hole (52) having a greater diameter than the shaft insertion hole (51).
Provided is a purging device that is capable of preventing the entraining of air when a submersible pump is placed inside a pump column, that is capable of heating the submersible pump to prevent liquefaction of airborne components upon removing the submersible pump from the pump column, and that is capable of preventing liquefied gas from being released into the atmosphere. The purging device comprises: a sealed purge vessel (1) for housing a submersible pump (2); a vacuum line (37) connected to the sealed purge vessel (1) and also connected to a vacuum source (39); a purge gas supply line (38) connected to the sealed purge vessel (1) and also connected to a purge gas supply source (40B); and a purge gas supply valve (35) attached to the purge gas supply line (38).
F04B 15/08 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
F04B 53/22 - Arrangements for enabling ready assembly or disassembly
F04D 7/00 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
F04D 13/08 - Units comprising pumps and their driving means the pump being electrically driven for submerged use
The present invention relates to a buffer gate used to separate the inside and the outside of a pump column when a submerged-type pump for increasing the pressure of liquid gas such as liquid nitrogen is introduced into the pump column and lifted from the pump column. A buffer gate (1) separates the inside and the outside of a pump column (3) inside which a submerged-type pump (2) for transferring liquid gas is disposed. The buffer gate (1) comprises a buffer box (14) which has a buffer chamber (12) therein, a first partition wall (16) which closes an upper opening of the buffer box (14), a second partition wall (17) which closes an upper opening of the pump column (3), and a purge gas inlet port (20) which is in communication with the buffer chamber (12). The buffer box (14) is fixed to an upper end of the pump column (3).
F17C 9/00 - Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
F17C 13/00 - VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES - Details of vessels or of the filling or discharging of vessels
A lifting device is provided which can obviate the need for a permanently installed large hoist. The lifting device (12) is used to lift and lower a submerged pump (2), which is used for transferring a liquified gas, inside of a pump column (3). The lifting device (12) is provided with a cable (13) and a hoist (14) connected to the cable (13). The cable (13) is provided with multiple split cables (13B), and multiple connecting links (16) which detachably connect the multiple split cables (13B).
A purge vessel (1) comprises: a vessel body (21) having an internal space (20) for accommodating a submerged pump (2); a top lid (23) that covers an upper opening of the vessel body (21); a bottom lid (24) that covers a lower opening of the vessel body (21); and a purge gas inlet port (27) and a purge gas outlet port (28) that interconnect with the internal space (20) of the vessel body (21). The vessel body (21) is fixed to an upper section of a pump column (3) in which the submerged pump (2) is installed.
F17C 13/00 - VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES - Details of vessels or of the filling or discharging of vessels
F04D 7/02 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
F04D 13/08 - Units comprising pumps and their driving means the pump being electrically driven for submerged use
6.
INTEGRALLY-TRANSPORTABLE PURGE CONTAINER AND METHOD OF USING THE INTEGRALLY-TRANSPORTABLE PURGE CONTAINER
The present invention provides a portable purge container capable of preventing entrainment of air when inserting a submersible pump into a pump column, and preventing liquefaction of components in air by heating the submersible pump when removing the submersible pump from the pump column. An integrally portable purge container (1) is provided with: a container body (21) having an internal space (20) for housing a submersible pump (2); an upper lid (23) for covering an upper opening of the container body (21); a lower lid (24) for covering a lower opening of the container body (21); and, a purge gas inlet port (27) and a purge gas outlet port (28) that communicate with the internal space (20) of the container body (21). The integrally portable purge container (1) is detachably connected to the upper section of a pump column (3) on which the submersible pump (2) is installed. The integrally portable purge container (1) is integrally conveyed with the submersible pump (2).
F17C 13/00 - VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES - Details of vessels or of the filling or discharging of vessels
F04D 13/08 - Units comprising pumps and their driving means the pump being electrically driven for submerged use
7.
POWER FEEDING APPARATUS AND POWER FEEDING METHOD FOR SUBMERSIBLE PUMP
The present invention relates to a power supply device and a power supply method for supplying power to a submerged pump used to transport a liquefied gas such as liquefied ammonia, liquefied natural gas (LNG), or liquid hydrogen. A power supply device (15) comprises: a first electrical contact (21) which is secured to a submerged pump (7) and which is electrically connected to a motor (7a) of the submerged pump (7); a second electrical contact (22) contacting the first electrical contact (21); and a power cable (25) electrically connected to the second electrical contact (22). At least a portion of the second electrical contact (22) is disposed inside a pump column (10) housing the submerged pump (7).
H02H 7/08 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from norm for dynamo-electric motors
The present invention relates to a pump casing and a pump. A pump casing (5) is provided with a cutter (30) having an upper surface (35) that, when an impeller (4) is stored in the pump casing (5), opposes a leading edge (20) of the impeller (4). The upper surface (35) has a region having at least two angles.
F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous
9.
FLUID-PATH SWITCHING APPARATUS AND METHOD OF PREVENTING IDLING ROTATION OF SUBMERSIBLE PUMP
The present invention relates to technology for preventing dry running of a submerged-type pump used for transferring liquefied gas such as liquefied ammonia, liquid hydrogen, liquid nitrogen, liquefied natural gas, liquefied ethylene gas, and liquefied petroleum gas. A flow path switching device (5) comprises a flow path structure (45) that has a first flow path (41), a second flow path (42), and a third flow path (43), and a valve (47) that is disposed in the flow path structure (45) and that selectively connects the third flow path (43) to the first flow path (41) or the second flow path (42), wherein the first flow path (41) is connected to a discharge opening (1b) of the submerged-type pump (1), the second flow path (42) is connected to the inside of an intake container (2), and the third flow path (43) is connected to a discharge port (8) of the intake container (2).
The present invention pertains to a sealing system which is used for a pump for increasing pressure of a volatile liquid such as liquid ammonia. A sealing system (2) is provided with: a stuffing box (35) that forms a barrier chamber (30) and a pump side sealing chamber (43); a mechanical seal (20) that is disposed in the barrier chamber (30); and a barrier gas supply system (32) that supplies, into the barrier chamber (30), a barrier gas having pressure higher that the pressure of the volatile liquid in the pump side sealing chamber (43). The pump side sealing chamber (43) is positioned between an impeller (7) of a pump (1) and the mechanical seal (20). The barrier gas supply system (32) is provided with a pressure control valve (50) that maintains a constant difference between pressure in the barrier chamber (30) and pressure in the pump side sealing chamber (43).
The present invention provides a treatment method of a radioactive iodine- containing fluid, comprising passing the radioactive iodine-containing fluid through an adsorbent for iodine consisting of a silver-containing binderless zeolite molded body having a silver content of 50 mass% or less, to adsorb the radioactive iodine on the adsorbent for iodine.
B01J 20/28 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
C01B 39/18 - Type A from a reaction mixture containing at least one aluminium silicate or aluminosilicate of a clay type, e.g. kaolin or metakaolin or its exotherm modification or allophane
Abstract of the Disclosure: An apparatus for remote monitoring color distribution of two materials charged in a treating column by moving a color sensor along a viewing window of the column. The color sensor moving along the viewing window projects a light on-to the materials in the treating column and receives the reflected light to convert into a reception signal. A comparator com- pares the reception signal with the reference signal representing a standard color of the materials in the column to produce a digital color difference signal. The digital color difference signal is sampled and distributed to indicator lamps in accordance with position signals from the position sensing means which senses the passage of the color sensor by each of a plurality position. Thus, the indicator lamps provides a remote display of the color distribution of the materials along the viewing window. Further, operation processing means is provided which checks the inversion frequency of samples of the color difference signal and the inversion position or positions thereof and selectively produces one of a plurality of control signals each indicating how far the separation process goes.
patents
