Slurry-transporting facility and slurry transportation control method

A slurry transportation control method which uses a slurry-transporting facility equipped with a plurality of pump-equipment circuits and configured to transport slurry from a feed tank to a reservoir tank provided with a pressure gauge via one of the plurality of pump-equipment circuits,

• the slurry-transporting facility comprising:
• pipe arrangements which branch out from the feed tank into the plurality of circuits;
• a transport pump provided in the pipe arrangements in each of the circuits;
• a first valve provided upstream from the transport pump in the pipe arrangement in each of the circuits;
• a second valve provided downstream from the transport pump in the pipe arrangement in each of the circuits;
• a uniting pipe arrangement formed by joining of the pipe arrangements of the respective circuits at a predetermined position downstream from the second valve and connected to the reservoir tank;
• a third valve provided in the uniting pipe arrangement and configured to control slurry transportation to the reservoir tank;
• and
• a pressure gauge provided upstream from the third valve in the uniting pipe arrangement and configured to measure a pressure in the uniting pipe arrangement,
• wherein, in the pipe arrangement in each of the circuits, a pressure gauge configured to measure a pressure in the pipe arrangement is provided at a position downstream from the transport pump and upstream from the second valve, and
• wherein the plurality of pump-equipment circuits are used by switchover between the circuits, and, at the time of switchover from a first of the pump-equipment circuits which has the transport pump in an operating state to a second of the pump-equipment circuits,
• to transport slurry via the second pump-equipment circuit, the steps are executed in order:
• opening the first valve provided in the pipe arrangement in the second circuit;
• switching the transport pump in the second circuit to an operating state to operate the pump;
• opening the second valve provided in the pipe arrangement in the second circuit after a value detected by the pressure gauge provided downstream from the transport pump in the pipe arrangement in the second circuit becomes larger than a value detected by the pressure gauge provided in the uniting pipe arrangement;
• closing the second valve provided in the pipe arrangement in the first circuit;
• stopping the transport pump in the first circuit to make the pump into a waiting state;
• and
• closing the first valve provided in the pipe arrangement in the first circuit.

A slurry transportation control method which uses a slurry-transporting facility equipped with a plurality of pump-equipment circuits and configured to transport slurry from a feed tank to a reservoir tank provided with a pressure gauge via one of the plurality of pump-equipment circuits,

• the slurry-transporting facility comprising:
• pipe arrangements which branch out from the feed tank into the plurality of circuits;
• a transport pump provided in the pipe arrangement in each of the circuits;
• a first valve provided upstream from the transport pump in the pipe arrangement in each of the circuits;
• a second valve provided downstream from the transport pump in the pipe arrangement in each of the circuits;
• a uniting pipe arrangement formed by joining of the pipe arrangements of the respective circuits at a predetermined position downstream from the second valve and connected to the reservoir tank;
• a third valve provided in the uniting pipe arrangement and configured to control slurry transportation to the reservoir tank;
• and
• a pressure gauge provided upstream from the third valve in the uniting pipe arrangement and configured to measure a pressure in the uniting pipe arrangement,
• wherein, in the pipe arrangement in each of the circuits, a pressure gauge configured to measure a pressure in the pipe arrangement is provided at a position downstream from the transport pump and upstream from the second valve, and
• wherein the plurality of pump-equipment circuits are used by switchover between the circuits, and, at the time of switchover from a first of the pump-equipment circuits which has the transport pump in an operating state to a second of the pump-equipment circuits,
• to transport slurry via the second pump-equipment circuit, the steps are executed in order:
• opening the first valve provided in the pipe arrangement in the second circuit;
• switching the transport pump in the second circuit to an operating state to operate the pump;
• opening the second valve provided in the pipe arrangement in the second circuit after a value detected by the pressure gauge provided downstream from the transport pump in the pipe arrangement in the second circuit becomes larger than a value detected by the pressure gauge provided in the uniting pipe arrangement and the value detected by the pressure gauge provided in the pipe arrangement in the second circuit becomes larger than a value detected by the pressure gauge provided in the pipe arrangement in the first circuit;
• closing the second valve provided in the pipe arrangement in the first circuit;
• stopping the transport pump in the first circuit to make the pump into a waiting state;
• and
• closing the first valve provided in the pipe arrangement of the first circuit.