Pump system having energy recovery apparatus

An energy recovery device and pressurized pump technology, which is applied to pump devices, components of pumping devices for elastic fluids, pumps, etc., can solve the problems of rising equipment costs and large operating hours

Inactive Publication Date: 2011-04-27
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the past, for example, as shown in Patent Document 1, since the above-mentioned booster pump and the energy recovery device were individually designed and arranged, the man-hours for installation were large, and the size of the device was increase

Method used

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  • Pump system having energy recovery apparatus
  • Pump system having energy recovery apparatus
  • Pump system having energy recovery apparatus

Examples

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Embodiment Construction

[0025] Hereinafter, embodiments of the present invention will be described in detail using the drawings.

[0026] First, a seawater desalination device using such a booster pump will be described. image 3 Among them, 100 is a booster pump constituted by a centrifugal pump, and 200 is a Francis turbine (water turbine) as an energy recovery device disposed below the booster pump 100 to recover power energy. 1 is the common rotating shaft of the booster pump 100 and the hydraulic turbine 200, 300 is an axial thrust maintaining device for maintaining the axial thrust generated by the rotation of both the pump and the turbine, and 50 is an axial thrust maintaining device including Raw water with impurities such as salts is subjected to reverse osmosis treatment to remove impurities with a high-pressure reverse osmosis membrane unit.

[0027] When the booster pump 100 is driven by the motor (not shown), the rotating shaft 1 rotates, and the raw water 51 containing impurities such ...

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Abstract

A compact, efficient, reliable, low-cost pump system having an energy recovery apparatus is provided for a large capacity desalination plant using a reverse osmosis membrane. The pump system in a desalination plant using a reverse osmosis membrane, the system includes a seawater pressurization pump and an energy recovery apparatus that recovers energy from high-pressure concentrated waste water through the reverse osmosis membrane to use the energy as a driving force for the pressurization pump. Hydro turbine impellers and pump impellers are disposed opposite each other coaxially with a pump shaft of the pressurization pump to reduce an axial thrust. A thrust direction of the shaft is supported by a single axial thrust support device. A radial direction of the shaft is supported by multiple radial submerged bearings.

Description

technical field [0001] The present invention relates to a pump provided with an energy recovery device for recovering power from energy of concentrated water used in seawater desalination facilities and the like. Background technique [0002] The market for seawater desalination equipment is expected to expand due to the expansion of the world's water demand and the shortage of water due to climate change. The water supplied from this seawater desalination facility supports the basics of people's lives, and it is required to ensure water quality in the case of reducing water production costs and supplying drinking water. In particular, in terms of reducing the cost of water production, it is expected to increase efficiency in order to reduce the equipment cost of the reverse osmosis membrane pressurized water supply pump that consumes about 50% of the electric energy input into the equipment and reduce the operating cost. [0003] In addition, since the concentrated water d...

Claims

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Application Information

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IPC IPC(8): F04D1/06F04D29/00
CPCF05B2220/602Y02B10/50F05B2220/62Y02E10/223Y02E10/226F03B3/02F04D13/04Y02E10/20
Inventor 依田裕明千叶由昌石居宪法
Owner HITACHI LTD
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