Abstract: According to one embodiment, a seawater desalination system includes a membrane filtering pump, a first to third flowmeter, a filtering membrane, a high-pressure pump, a pressure gauge, a reverse osmosis membrane, a discharge valve and a control module. The membrane filtering pump outputs seawater according to a first control signal. The first flowmeter measures flow rate Q1. The high-pressure pump outputs filtered water from the filtering membrane according to a second control signal. The first pressure gauge measures pressure P1. The reverse osmosis membrane desalinates the filtered water into fresh water. The second flowmeter measures flow rate Q2. The third flowmeter measures flow rate Q3. The discharge valve discharges a high-concentration salt water according to a third control signal. The control module performs first, second, and third flow rate control with reference to the flow rate Q1, Q2 and Q3 and the pressure P1.

Abstract: According to one embodiment, a seawater desalination system includes a membrane filtering pump, a first to third flowmeter, a filtering membrane, a high-pressure pump, a pressure gauge, a reverse osmosis membrane, a discharge valve and a control module. The membrane filtering pump outputs seawater according to a first control signal. The first flowmeter measures flow rate Q1. The high-pressure pump outputs filtered water from the filtering membrane according to a second control signal. The first pressure gauge measures pressure P1. The reverse osmosis membrane desalinates the filtered water into fresh water. The second flowmeter measures flow rate Q2. The third flowmeter measures flow rate Q3. The discharge valve discharges a high-concentration salt water according to a third control signal. The control module performs first, second, and third flow rate control with reference to the flow rate Q1, Q2 and Q3 and the pressure P1.

Abstract: According to one embodiment, a membrane filtration system includes a raw water tank, a first tank, a second tank, a nanofiltration membrane module comprises a nanofiltration membrane, and removes the solute from the raw water with a solute removal rate of 1% to 30%, a first pump for supplying the raw water from the raw water tank to the module to cause the raw water to permeate through the membrane and send the water that has permeated through the membrane as a primary water to the first tank, a RO module comprises a RO membrane that further removes the solute from the primary water, and a second pump for supplying the primary water from the first tank to the RO module to cause the primary water to permeate through the membrane and send the water that has permeated through the membrane as a secondary water to the second tank.

Abstract: A quantity totalizer for a three-dimensional arrangement and adjustment CAD includes integrating means for referring to parts information stored in the three-dimensional arrangement and adjustment CAD and associating line information, which is separated from the parts information for storage and which is unique to a line, with the parts information to generate integrated information in which the quantity of parts is totalized; numbering means for systematically numbering the integrated information and outputting a quantity totalization result; and comparing means for comparing the quantity totalization result output by the numbering means with a parts number column in a design drawing produced with the three-dimensional arrangement and adjustment CAD to check the parts having the same parts information and line information against each other and replacing parts numbers in the parts number column in the design drawing produced with the three-dimensional arrangement and adjustment CAD with parts numbers in the

Abstract: A quantity totalizer for a three-dimensional arrangement and adjustment CAD includes integrating means for referring to parts information stored in the three-dimensional arrangement and adjustment CAD and associating line information, which is separated from the parts information for storage and which is unique to a line, with the parts information to generate integrated information in which the quantity of parts is totalized; numbering means for systematically numbering the integrated information and outputting a quantity totalization result; and comparing means for comparing the quantity totalization result output by the numbering means with a parts number column in a design drawing produced with the three-dimensional arrangement and adjustment CAD to check the parts having the same parts information and line information against each other and replacing parts numbers in the parts number column in the design drawing produced with the three-dimensional arrangement and adjustment CAD with parts numbers in the