CN202089806U

CN202089806U - Water-saving and energy-saving reverse-osmosis device

Info

Publication number: CN202089806U
Application number: CN2010205524994U
Authority: CN
Inventors: 陈健波; 陈浩; 潘欣华; 陈国强; 叶建卫; 许学峰; 范中超
Original assignee: ZHEJIANG STONE ENVIRONMENTAL ENGINEERING Co Ltd
Current assignee: ZHEJIANG STONE ENVIRONMENTAL ENGINEERING Co Ltd
Priority date: 2010-09-23
Filing date: 2010-09-23
Publication date: 2011-12-28
Anticipated expiration: 2020-09-23

Abstract

A water-saving and energy-saving reverse-osmosis device mainly comprises an ultrafiltration pretreatment device, an ordinary reverse-osmosis device and a concentrated water reverse-osmosis device. After being treated by the ultrafiltration pretreatment device, raw water enters into the ordinary reverse-osmosis device to be treated. Concentrated water of the ordinary reverse-osmosis device is delivered to a concentrated water reverse-osmosis system through a booster pump, part of the concentrated water of the concentrated water reverse-osmosis device is discharged, and part of the concentrated water is connected to an outlet pipe of a concentrated water reverse-osmosis booster pump through a large-flow and low-lift circulating pump. The water-saving and energy-saving reverse-osmosis device utilizes water resources to the utmost, the water recycling rate of a system is improved from approximately 75 percent of a traditional process to 90 percent, and most of energy of the concentrated water is recycled.

Description

A kind of reverse osmosis equipment of saving water and energy

Technical field

The utility model relates to the pure water of industries such as a kind of electric power, petrochemical industry, electronics, medicine, beverage and produces reverse osmosis water production process.

Technical background

Reverse osmosis technology (RO) is present widely used a kind of pure water preparation technology, and its principle is under the effect that is higher than solution osmotic pressure, can not and these materials and water sepn be come through semi-permeable membranes according to other materials.Reverse osmosis can be removed (clearance are up to 98%-99%) such as dissolved salts in the water, colloid, microorganism, organism effectively.Reverse osmosis unit generally is made up of pretreatment unit, high-pressure delivery device, reverse osmosis membrane.In actual application, be to improve the system recoveries rate, reverse osmosis unit generally all adopts the two-part mounting means, and promptly the dense water of first section reverse osmosis unit enters second section reverse osmosis unit and handles, and the rate of recovery of system is generally about 75%.This means that also 1/4th former water will waste nearly, in the process of preparation pure water, not only will discharge a large amount of dense water, and the energy that consumes in the system water process is also more.Therefore conventional technology can not efficent use of resources, and system water process energy consumption is higher.

The utility model content

The purpose of this utility model is on the basis of conventional pure water preparation technology, and a kind of reverse osmosis system water novel process of energy-saving and water-saving is provided.

The technical solution of the utility model:

A kind of reverse osmosis equipment of saving water and energy, mainly form by ultrafiltration pretreatment device, common reverse osmosis unit and dense water reverse osmosis unit:

Step 1, former water at first by ultrafiltration membrance filter, are reduced to about 2.0 the SDI value of feed water by reverse osmosis, help improving the rate of recovery of total system.

Step 2, the dense water of common reverse osmosis unit discharging is delivered to dense water reverse osmosis unit through the series connection pipeline that is connected with dense water reverse osmosis unit inlet.

Step 3, through the reverse osmosis concentrated water that dense water reverse osmosis unit is handled, a part is circulated to water inlet place of dense water reverse osmosis unit, and another part is as discharge of wastewater.

In the such scheme, the dense water of common reverse osmosis unit discharging is delivered to dense water reverse osmosis unit through the series connection pipeline that is connected with dense water reverse osmosis unit inlet.Common reverse osmosis unit is connected by topping-up pump with dense water reverse osmosis unit, and dense water reverse osmosis unit adopts short flow process single hop design, and by setting up the dense water-circulating pump of big flow, low lift, with the part concentrate recirculation to the topping-up pump exit.By having strengthened water supply flow and flow velocity, strengthen the scouring capability of reverse osmosis face current to dirt, can effectively prevent the deposition of face organic contamination and various impurity and the generation of reverse osmosis face concentration polarization.

All add a certain amount of Scale inhibitors before common reverse osmosis unit and the water inlet of dense water reverse osmosis unit.Two kinds of reverse osmosis units can be equipped with robot control system(RCS) and cleaning system, by the monitoring effluent quality, under the situation of effluent quality variation, clean automatically.

The key problem in technology of this technology is to utilize the pre-processing device of high-performance ultra-filtration membrane as reverse osmosis, and the SDI value of feed water by reverse osmosis is reduced to about 2.0, improves the rate of recovery of reverse osmosis produced water.Utilize the dense water treatment novel process of dense water reverse osmosis unit simultaneously, recycle dense water of part that originally will discharge and the most of energy that reclaims dense water pressure.The total yield of whole plant system water increases to 90% by about 75% of common reverse osmosis.The equipment operation scheme adopts program control control, can carry out automated system operation and cleaning fully, and total system is compared with traditional technology can save water and energy 10～15%, save working cost 20%.

Compare with traditional technology, the utlity model has following advantage:

1, economize on electricity.Because the dense water pressure of common reverse osmosis unit is higher, only needs to improve less pressure and just enough satisfy the required intake pressure requirement of dense water reverse osmosis unit.Because reverse osmosis system power consumption the best part is into water high-pressure pump, this technology has reclaimed most dense water pressure, has saved electric energy.

2, water saving improves the system recoveries rate.Recyclable about 60% dense water after dense water reverse osmosis unit is handled, the rest part concentrated water discharge is compared with conventional reverse osmosis system, and the system recoveries rate rises to about 90% by 75%, water saving 15%.

Description of drawings

Accompanying drawing is the save water and energy structural representation of reverse osmosis equipment of the utility model.

Among the figure: 1, former water 2, ultra-filtration equipment 3, high-pressure pump 4, common reverse osmosis unit 5, topping-up pump 6, system produce water 7, dense water reverse osmosis unit 8, variable valve 9, the dense water 10 of discharging, dense water-circulating pump 11,12, Scale inhibitors chemicals dosing plant

Embodiment

The utility model is described in further detail below in conjunction with example.

As shown in drawings, the utility model is made up of three parts, and 2 is ultra-filtration equipment, and 4 is common reverse osmosis unit, and 7 is dense water reverse osmosis unit.

Concrete water preparation process is:

Step 1, former water 1 behind Scale inhibitors chemicals dosing plant 12 adding Scale inhibitorss, are delivered to common reverse osmosis unit 4 by high-pressure pump 3 after ultra-filtration equipment 2 pre-treatment.

Step 2 is delivered to system's product water 6 through the product water that common reverse osmosis unit 4 is handled, and dense water is delivered to before the dense water reverse osmosis unit, behind Scale inhibitors chemicals dosing plant 11 adding Scale inhibitorss, delivers to dense water reverse osmosis unit 7 by increasing pump 5.

Step 3 is delivered to system's product water 6 through the product water that dense water reverse osmosis unit 7 is handled, and after the reverse osmosis concentrated water section of dense water was circulated to topping-up pump 5 outlets by dense water-circulating pump 10, the dense water 9 of partial discharge was by variable valve 8 dischargings.

Claims

1. the reverse osmosis equipment of saving water and energy mainly is made up of ultrafiltration pretreatment device, common reverse osmosis unit and dense water reverse osmosis unit, it is characterized in that the concentrated water discharge Guan Yunong water reverse osmosis unit inlet of common reverse osmosis unit connects.

2. a kind of reverse osmosis equipment of saving water and energy as claimed in claim 1 is characterized in that common reverse osmosis unit is connected by topping-up pump with dense water reverse osmosis unit.

3. a kind of reverse osmosis equipment of saving water and energy as claimed in claim 1, its dense water reverse osmosis unit adopt short flow process single hop design, and by setting up the dense water-circulating pump of big flow, low lift, with the part concentrate recirculation to the topping-up pump exit.