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A kind of forward and reverse flushing piston type water storage, micro-wastewater RO system and membrane flushing method

A technology of forward and reverse washing and water storage, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem that the RO system cannot be used for domestic water purification treatment and affects the use effect of the RO system. , blocking membrane and other problems, to achieve the effect of improving water saving effect, ensuring membrane filtration efficiency, and improving flushing effect

Inactive Publication Date: 2017-10-31
GUANGDONG FIND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the RO system is in standby, the high-concentration water in the RO membrane will deposit a large amount of substances (such as calcium and magnesium ions) on the surface of the RO membrane due to the long-term static precipitation, causing membrane blocking (fouling). Washing with water cannot completely wash away the deposits, which greatly affects the actual use effect of the RO system, especially for the purification of domestic water, the requirements for the treatment effect are more stringent, such RO systems cannot be used for domestic water. Purification

Method used

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  • A kind of forward and reverse flushing piston type water storage, micro-wastewater RO system and membrane flushing method
  • A kind of forward and reverse flushing piston type water storage, micro-wastewater RO system and membrane flushing method
  • A kind of forward and reverse flushing piston type water storage, micro-wastewater RO system and membrane flushing method

Examples

Experimental program
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Effect test

Embodiment 1

[0055] The water purifier of a reverse osmosis device in a residential area in Shandong, with an initial design capacity of 300L / day, is operated by a conventional flushing control system, and the membrane is cleaned regularly. After half a year of use, the initial water production of the system is 100L / day. The operating parameters before the transformation are as follows Table 1:

[0056] Table 1 Operating parameters before transformation

[0057]

[0058] Due to the fouling problem caused by long-term operation, the parameters of the reverse osmosis system such as water production and desalination rate are not as good as before. However, using the forward-backwash micro-wastewater RO system of the present invention, under the same environment, the operating parameters are as follows in Table 2:

[0059] Table 2 Operating parameters after modification

[0060]

[0061] Adopting the forward-backwash micro-wastewater RO system of the present invention greatly increases ...

Embodiment 2

[0063] A household water reverse osmosis system in the living area of ​​a group, the design standard is 1500L / day, one-stage two-stage operation, a conventional backwash system is used for automatic control of membrane flushing, the system has been in operation for 8 months, the membrane modules are seriously polluted, and the operating cost and effect are not up to the mark According to the requirements, the operating parameters of the system before the transformation are shown in Table 3:

[0064] Table 3 Operating parameters before transformation

[0065]

[0066] Adopting the forward-backwashing micro-wastewater RO system of the present invention, through the double flushing system and the automatic control system, the service life and flushing effect of the RO membrane are greatly improved, the membrane inlet pressure and fouling degree are reduced, and the operating energy consumption is reduced.

[0067] Table 4 Operating parameters after modification

[0068]

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Abstract

The invention discloses a positive and reverse flushing piston type water storage device, a micro waste water RO (reverse osmosis) system and a membrane flushing method. The positive and reverse flushing piston type water storage device comprises a water storage device main body, a water storage device case, a water storage device joint and a flushing water path. The system comprises a micro computer control system, a front filtering unit, an RO pump, an RO membrane device, a positive and reverse piston type water storage device, a pressure barrel, a back filtering unit and a water outlet faucet; the flushing water path comprises a positive flushing water path and a reverse flushing water path; through the positive and reverse flushing, dirty materials on the surface of the membrane are brought away, and the membrane hole blockage can also be prevented; the water-saving effect is improved; the service life of the RO film is prolonged.

Description

technical field [0001] The invention belongs to the technical field of water treatment and purification, and in particular relates to a positive and negative flushing piston type water storage device, a micro-wastewater RO system and a membrane flushing method. Background technique [0002] Membrane treatment reactors are widely used in wastewater treatment, commonly used are forward osmosis, reverse osmosis (RO), ultrafiltration, microfiltration, nanofiltration, etc. Especially when RO membranes are used, it is easy to deposit a large amount of substances in water. Attached to the surface and pores of the RO membrane, causing the clogging of the RO membrane, resulting in a smaller water output and unclean filtered water quality. [0003] And this kind of sedimentation phenomenon mainly occurs in the static state of water, and the flowing water flow is not easy to produce sedimentation phenomenon. When the RO system is working, because the water is flowing, it is actually n...

Claims

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Application Information

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IPC IPC(8): B01D61/08B01D61/10B01D65/02C02F1/44C02F1/00
CPCB01D61/025B01D61/08B01D61/10B01D65/02B01D2321/40C02F1/001C02F1/441C02F2209/005C02F2209/10C02F2303/16
Inventor 兰长和李华文伍增华
Owner GUANGDONG FIND TECH
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