CN211871724U

CN211871724U - Full membrane method system desalination equipment

Info

Publication number: CN211871724U
Application number: CN201922235322.5U
Authority: CN
Inventors: 黄振兴; 金君; 朱德平
Original assignee: Wuxi Rongda Environmental Technology Co ltd
Current assignee: Wuxi Rongda Environmental Technology Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-11-06
Anticipated expiration: 2029-12-13

Abstract

The utility model discloses a desalination device of a full-membrane system, which comprises a PLC control system, an aeration tank, an accelerating clarifier, a self-cleaning filter, a membrane bioreactor, an intermediate water tank, a scale inhibitor feeding device, a precision filter, an ultrafiltration device, an ultrafiltration product water tank, a first-level reverse osmosis device, a first-level reverse osmosis product water tank, a second-level reverse osmosis device, a second-level reverse osmosis product water tank, an EDI device and an EDI product water tank, wherein the aeration tank, the accelerating clarifier, the self-cleaning filter, the membrane bioreactor, the intermediate water tank, the; the device has the advantages of low film replacement cost, flexible structure, full-automatic water quality monitoring and water outlet quality guarantee.

Description

Full membrane method system desalination equipment

Technical Field

The utility model relates to a sewage treatment field especially relates to a full membrane method system desalination equipment.

Background

The membrane technology is called as the water treatment technology of the 21 st century, is the technology which is developed most rapidly and applied most widely in recent 40 years, and the water treatment field is the most important application field of the membrane technology.

Currently, the membrane technologies for water treatment in industrial production are mainly of the following types: ultrafiltration, reverse osmosis, and Electrodeionization (EDI). The development of membrane technology has also promoted the research and development of full membrane desalination device, chinese patent CN207361938U discloses an adopt full membrane method water treatment preparation demineralized water system, including former pond, former pond passes through tube coupling raw water heater, raw water heater passes through the pipeline and is connected with the filter, the filter passes through pipeline and self-cleaning filter, self-cleaning filter passes through pipeline and ultrafiltration system, ultrafiltration system passes through pipeline and ultrafiltration pond intercommunication, ultrafiltration pond passes through the pipeline and is connected with the one-level booster pump, the one-level booster pump passes through the pipeline and is connected with one-level precision filter, the one-level precision filter passes through the pipeline and is connected with one-level reverse osmosis, one-level reverse osmosis passes through the pipeline and is connected with the decarbonizer, the decarbonizer passes through the pipeline and is connected with one-level pond, the one-level. This patent has effectively solved the poor product water quality fluctuation that causes of raw water quality of water, more does benefit to the operating stability who promotes demineralized water system, can also effectively reduce preparation demineralized water running cost, prolongs demineralized water system's maintenance cycle. The patent has certain defects as most of all-film desalting devices on the market at present: the cost of replacing the film is higher, and the process flow structure is single.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art, providing a full membrane system desalination equipment which has low membrane replacement cost, flexible structure and full-automatic water quality monitoring and ensures the water outlet quality.

In order to realize the purpose of the utility model, the technical proposal of the utility model is that:

a desalination device of a full-membrane system comprises a PLC control system, an aeration tank, an accelerated clarifier, a self-cleaning filter, a membrane bioreactor, an intermediate water tank, a scale inhibitor feeding device, a precision filter, an ultrafiltration device, an ultrafiltration product water tank, a primary reverse osmosis device, a primary reverse osmosis product water tank, a secondary reverse osmosis device, a secondary reverse osmosis product water tank, an EDI device and an EDI product water tank which are sequentially connected through pipelines; the water outlet of the ultrafiltration water production tank is respectively connected with the primary reverse osmosis device and the secondary reverse osmosis device through a first ultrafiltration water outlet pipe and a second ultrafiltration water outlet pipe; the first reverse osmosis water production tank is also provided with a first reverse osmosis pipe, and the first reverse osmosis pipe is connected with the EDI device; the second reverse osmosis water production tank is also provided with a second reverse osmosis pipe, the second reverse osmosis pipe is connected with the first reverse osmosis device, and the first ultrafiltration water outlet pipe and the second ultrafiltration water outlet pipe are provided with a first valve and a second valve; a third valve is arranged on a pipeline between the first-stage reverse osmosis water production tank and the second-stage reverse osmosis device; a fourth valve is arranged on a pipeline between the secondary reverse osmosis water production tank and the EDI device; a fifth valve is arranged on the first reverse osmosis pipe, and a sixth valve is arranged on the second reverse osmosis pipe; and the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve are all connected with a PLC control system.

Preferably, a first high-pressure pump is arranged between the precision filter and the ultrafiltration device, a turbidity measuring device is further arranged on a pipeline between the ultrafiltration device and the ultrafiltration water production tank, and the first high-pressure pump and the turbidity measuring device are both connected with the PLC control system.

Preferably, a first pH value detector is further arranged in the first-stage reverse osmosis water production tank and connected with the PLC control system.

Preferably, a second pH value detector is further arranged in the secondary reverse osmosis water production tank and is connected with the PLC control system.

Preferably, a conductivity tester is further arranged between the EDI water production tank and the EDI device, and the conductivity tester is connected with the PLC control system.

The utility model has the advantages that:

firstly, the method comprises the following steps: the working modes of the first-stage reverse osmosis device and the second-stage reverse osmosis device can be adjusted by controlling the opening and closing of the valve, the structure is flexible, and the cost for replacing the reverse osmosis membrane is low;

secondly, the method comprises the following steps: pollutants treated by the membrane bioreactor are microorganisms (namely activated sludge), the effect is mainly used for intercepting sludge, the effective components of the sludge are mainly bacteria, the diameter of the bacteria is mostly more than 0.5um, and the pore diameter of a membrane in the Membrane Bioreactor (MBR) is slightly smaller than the diameter of the bacteria, namely between 0.2 and 0.45um, so that the required number of the membranes is small (namely one-time investment is small) and the energy consumption is low (operation cost is low) under the same flux; the Membrane Bioreactor (MBR) has the characteristics of high volume load and stable treatment effect, and does not need a subsequent matched precipitation unit;

thirdly, the method comprises the following steps: the scale inhibitor device is used for filtering water in the middle water tank, and can reduce subsequent equipment structures and prolong the service life of the equipment;

fourthly: the PLC control system controls each valve, the pH value detector, the conductivity tester, the turbidity measuring device and the like, so that the water quality is conveniently monitored, automatic control is realized, and the water outlet quality is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1 is a PLC control system, 2 is an aeration tank, 3 is an accelerated clarifier, 4 is a self-cleaning filter, 5 is a membrane bioreactor, 6 is an intermediate water tank, 7 is a scale inhibitor adding device, 8 is a precision filter, 9 is an ultrafiltration device, 10 is an ultrafiltration product water tank, 11 is a first-stage reverse osmosis device, 12 is a first-stage reverse osmosis product water tank, 13 is a second-stage reverse osmosis device, 14 is a second-stage reverse osmosis product water tank, 15 is an EDI device, 16 is an EDI product water tank, 17 is a first ultrafiltration outlet pipe, 18 is a second ultrafiltration outlet pipe, 19 is a first reverse osmosis pipe, 20 is a second reverse osmosis pipe, 21 is a first valve, 22 is a second valve, 23 is a third valve, 24 is a fourth valve, 25 is a fifth valve, 26 is a sixth valve, 27 is a first high-pressure pump, 28 is a turbidity measuring device, 29 is a first pH detector, 30 is a second pH detector, and 31 is a conductivity tester.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

Example 1:

a desalination device of a full-membrane system comprises a PLC control system 1, an aeration tank 2, an accelerated clarifier 3, a self-cleaning filter 4, a membrane bioreactor 5, an intermediate water tank 6, a scale inhibitor adding device 7, a precision filter 8, an ultrafiltration device 9, an ultrafiltration water production tank 10, a primary reverse osmosis device 11, a primary reverse osmosis water production tank 12, a secondary reverse osmosis device 13, a secondary reverse osmosis water production tank 14, an EDI device 15 and an EDI water production tank 16 which are sequentially connected through pipelines; the water outlet of the ultrafiltration water production tank 10 is respectively connected with the primary reverse osmosis device 11 and the secondary reverse osmosis device 13 through a first ultrafiltration water outlet pipe 17 and a second ultrafiltration water outlet pipe 18; the first-stage reverse osmosis water production tank 12 is also provided with a first reverse osmosis pipe 19, and the first reverse osmosis pipe 19 is connected with the EDI device 15; the second reverse osmosis water production tank 14 is also provided with a second reverse osmosis pipe 20, the second reverse osmosis pipe 20 is connected with the first reverse osmosis device 11, and the first ultrafiltration water outlet pipe 17 and the second ultrafiltration water outlet pipe 18 are provided with a first valve 21 and a second valve 22; a third valve 23 is arranged on a pipeline between the first-stage reverse osmosis water production tank 12 and the second-stage reverse osmosis device 13; a fourth valve 24 is arranged on a pipeline between the secondary reverse osmosis water production tank 14 and the EDI device 15; a fifth valve 25 is arranged on the first reverse osmosis pipe 19, and a sixth valve 26 is arranged on the second reverse osmosis pipe 20; the first valve 21, the second valve 22, the third valve 23, the fourth valve 24, the fifth valve 25 and the sixth valve 26 are all connected to the PLC control system 1 (not shown in the figure).

Preferably, a first high-pressure pump 27 is arranged between the precision filter 8 and the ultrafiltration device 9, a turbidity measuring device 28 is further arranged on a pipeline between the ultrafiltration device 9 and the ultrafiltration water production tank 10, and both the first high-pressure pump 27 and the turbidity measuring device 28 are connected with the PLC control system 1 (not shown in the figure).

Preferably, a first pH detector 29 is further disposed in the first-stage reverse osmosis water production tank 12, and the first pH detector 29 is connected to the PLC control system 1 (not shown in the figure).

Preferably, a second pH detector 30 is further disposed in the secondary reverse osmosis water production tank 14, and the second pH detector 30 is connected to the PLC control system 1 (not shown in the figure).

Preferably, an electrical conductivity tester 31 is further disposed between the EDI production water tank 16 and the EDI device 15, and the electrical conductivity tester 31 is connected to the PLC control system 1 (not shown).

Generally, the first-stage reverse osmosis device 11 and the second-stage reverse osmosis device 13 are in a series mode when working, namely, wastewater enters the first-stage reverse osmosis water production tank 12 after being treated by the first-stage reverse osmosis device 11, then enters the second-stage reverse osmosis device 13, then enters the second-stage reverse osmosis water production tank 14, and then enters the EDI device 15, and in this mode, the first valve 21, the third valve 23 and the fourth valve 24 are in an open state; the second valve 22, the sixth valve 26, and the fifth valve 25 are in the closed state;

when the reverse osmosis membrane in the reverse osmosis device needs to be replaced after the operation for a period of time, only the reverse osmosis membrane in the first-stage reverse osmosis device 11 needs to be replaced, after the replacement is completed, the second-stage reverse osmosis device 13 is used as a new first stage, and the first-stage reverse osmosis device 11 with the reverse osmosis membrane replaced is used as a new second stage, namely the first valve 21, the third valve 23 and the fourth valve 24 are in a closed state, and the second valve 22, the sixth valve 26 and the fifth valve 25 are in an open state, so that the cost is saved;

the first-stage reverse osmosis device 11 and the second-stage reverse osmosis device 13 can also be in a parallel working mode as required, and only the first valve 21, the second valve 22, the fourth valve 24 and the fifth valve 25 are required to be opened; the third valve 23 and the sixth valve 26 are closed, and the working state of the parallel mode can be entered, and the structure is flexible.

The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims

1. The utility model provides a desalination equipment of full membrane method system which characterized in that: the device comprises a PLC control system (1), an aeration tank (2), an accelerated clarifier (3), a self-cleaning filter (4), a membrane bioreactor (5), an intermediate water tank (6), a scale inhibitor adding device (7), a precision filter (8), an ultrafiltration device (9), an ultrafiltration water production tank (10), a primary reverse osmosis device (11), a primary reverse osmosis water production tank (12), a secondary reverse osmosis device (13), a secondary reverse osmosis water production tank (14), an EDI device (15) and an EDI water production tank (16) which are sequentially connected through pipelines; a water outlet of the ultrafiltration water production tank (10) is respectively connected with the primary reverse osmosis device (11) and the secondary reverse osmosis device (13) through a first ultrafiltration water outlet pipe (17) and a second ultrafiltration water outlet pipe (18); the primary reverse osmosis water production tank (12) is also provided with a first reverse osmosis pipe (19), and the first reverse osmosis pipe (19) is connected with the EDI device (15); a second reverse osmosis pipe (20) is also arranged on the second-stage reverse osmosis water production tank (14), the second reverse osmosis pipe (20) is connected with the first-stage reverse osmosis device (11), and a first valve (21) and a second valve (22) are arranged on the first ultrafiltration water outlet pipe (17) and the second ultrafiltration water outlet pipe (18); a third valve (23) is arranged on a pipeline between the first-stage reverse osmosis water production tank (12) and the second-stage reverse osmosis device (13); a fourth valve (24) is arranged on a pipeline between the secondary reverse osmosis water production tank (14) and the EDI device (15); a fifth valve (25) is arranged on the first reverse osmosis pipe (19), and a sixth valve (26) is arranged on the second reverse osmosis pipe (20); the first valve (21), the second valve (22), the third valve (23), the fourth valve (24), the fifth valve (25) and the sixth valve (26) are all connected with the PLC control system (1).

2. The desalination equipment of the full-membrane-method system according to claim 1, characterized in that: set up first high-pressure pump (27) between precision filter (8) and ultrafiltration device (9), still set up turbidity measuring device (28) on the pipeline between ultrafiltration device (9) and ultrafiltration product water tank (10), first high-pressure pump (27) and turbidity measuring device (28) all are connected with PLC control system (1).

3. The desalination equipment of the full-membrane-method system according to claim 1, characterized in that: still set up first pH value detector (29) in one-level reverse osmosis product water tank (12), first pH value detector (29) are connected with PLC control system (1).

4. The desalination equipment of the full-membrane-method system according to claim 1, characterized in that: and a second pH value detector (30) is also arranged in the secondary reverse osmosis water production tank (14), and the second pH value detector (30) is connected with the PLC control system (1).

5. The desalination equipment of the full-membrane-method system according to claim 1, characterized in that: and a conductivity tester (31) is further arranged between the EDI water production tank (16) and the EDI device (15), and the conductivity tester (31) is connected with the PLC control system (1).