CN202072558U - Photovoltaic wastewater zero discharge system - Google Patents

Abstract

The utility model relates to an industrial water treatment device for a photovoltaic waste water zero discharge system; it comprises a primary reverse osmosis device (11), a secondary reverse osmosis device (15), a sequential batch type Fenton device (24), a multi-media filter ( 26), activated carbon filter (27), ultrafiltration device (28), reverse osmosis device, etc.; PLC control system is connected to control pH adjustment pool (3), bag filter (6), ultrafiltration device (7), Primary reverse osmosis device (11), secondary reverse osmosis device (15), sequencing batch Fenton system (24), multimedia filter (26), activated carbon filter (27), ultrafiltration device (27), reverse Osmosis system (32) and other equipment; the utility model can reuse more than 97% of the water discharged up to the original standard to the production line, so that the water resources can circulate in the production area, the minimum amount of new water is introduced, and the only small amount of sewage treatment is The sludge is then harmlessly landfilled; and it occupies less land and has a high degree of automation, and the comprehensive utilization rate of water resources reaches more than 97%.

Description

A photovoltaic wastewater zero discharge system

Technical field:

The utility model relates to a water treatment device, in particular to a full-membrane method zero discharge device for industrial waste water. the

Background technique:

As we all know, my country is a country with a shortage of water resources, and the per capita water resources are about 2200m3, which is about a quarter of the world's average level. Moreover, my country's water waste is serious, and the efficiency of water resource utilization is low. Most cities in our country are basically in a state of water shortage, especially in the northern region, where water resources are even more tense. While water resources are tense, many sewage plants and enterprise sewage stations have discharged the treated reclaimed water for nothing. How to alleviate water shortage, especially the situation of enterprise's production water shortage, reusing these reclaimed water has been recognized by most people. At present, the largest water consumption in China is mainly the production water of enterprises, and the reused water is generally mainly used for miscellaneous purposes. the

Invention content:

The purpose of the utility model is to provide a photovoltaic wastewater zero discharge system. the

It includes a collection tank (1), a booster pump (2), a pH adjustment tank (3), a reservoir (4), a raw water pump (5), a bag filter (6), an ultrafiltration device (7), Ultrafiltration water tank (9), high-pressure pump (10), primary reverse osmosis device (11), pure water tank (13), high-pressure pump (14), secondary reverse osmosis device (15), reused water tank (17) , booster pump (18), EDI device (19), EDI water tank (21), concentrated water tank (22), booster pump (23), sequence batch Fenton device (24), booster pump (25), multiple Media filter (26), activated carbon filter (27), ultrafiltration device (28), ultrafiltration water tank (30), high pressure pump (31), reverse osmosis device (32), dosing device (34), concentrated water It consists of pipelines (8), (12), (16), (20), (29), (33) and a PLC control system. the

The ultrafiltration devices (7), (28) are hollow fiber membranes made of polysulfone or polyethersulfone, and their molecular weight cut-off is 10,000 Daltons. the

The concentrated water discharged by the ultrafiltration device (7) is connected with the reservoir (4) and the concentrated water tank (22) through the concentrated water pipeline (8); the produced water of the ultrafiltration device (7) enters the ultrafiltration water tank (9 ), pumped into the first-stage reverse osmosis device (11) through the high-pressure pump (10). the

The concentrated water discharged from the first-stage reverse osmosis device (11) is connected to the concentrated water tank (22) through the concentrated water pipeline (12), and the water produced by the reverse osmosis device (11) enters the pure water tank (13), and passes through the high-pressure pump (14 ) is pumped into the secondary reverse osmosis device (15). the

The concentrated water discharged from the secondary reverse osmosis device (15) is connected to the ultrafiltration water tank (9) through the concentrated water pipeline (16), and the water produced by the reverse osmosis device (15) enters the reuse water tank (17), and passes through the booster pump (18) is pumped into the EDI unit (19). the

The concentrated water discharged from the EDI device (19) is connected to the pure water tank (13) through the concentrated water pipeline (20), and the water produced by the EDI device (19) enters the EDI water tank (21) for use in photovoltaic production. the

Said booster pump (23) pumps waste water in the concentrated water tank (22) into the sequence batch type Fenton device (24), and after the reaction, the booster pump (25) extracts the supernatant therefrom and pumps it into the multimedia filter (26 ), its water production directly enters the activated carbon filter (27), and its water production enters the ultrafiltration device (28); the ultrafiltration device (28) water production enters the ultrafiltration water tank (30), and the ultrafiltration device (28) concentrate It is connected with the concentrated water tank (22) through the concentrated water pipeline (29). the

The high-pressure pump (31) pumps water from the ultrafiltration water tank (30) into the reverse osmosis device (32), and the reverse osmosis produced water enters the pure water tank (13) and the discharged concentrated water passes through the concentrated water pipeline (33) and the concentrated water tank ( 22) and wastewater treatment system connection. the

The PLC control system is connected to control the collection pool (1), the booster pump (2), the pH adjustment pool (3), the water storage tank (4), the raw water pump (5), the bag filter (6), and the ultrafiltration device ( 7), ultrafiltration water tank (9), high-pressure pump (10), primary reverse osmosis device (11), pure water tank (13), high-pressure pump (14), secondary reverse osmosis device (15), reuse water tank (17), booster pump (18), EDI device (19), EDI water tank (21), dosing system (34), concentrated water reuse part and pipeline valve system; the concentrated water reuse part is connected to control the concentrated water tank (22), booster pump (23), sequencing batch Fenton system (24), booster pump (25), multi-media filter (26), activated carbon filter (27), ultrafiltration device (27), ultrafiltration Filter water tank (30), high-pressure pump (31), reverse osmosis system (32). the

Its advantage of this utility model is:

Since the water discharged from the production line is used as the raw water, considering that the raw water quality is not mixed, the metal ion components are simple, and the COD content is low, the suspended solids in the raw water are removed by microfiltration and ultrafiltration devices; COD is concentrated by ultrafiltration and reverse osmosis devices, and then removed by the sequencing batch Fenton device, so that the effluent can meet the requirements of enterprise production water. Because the raw water of the utility model has been treated by microfiltration and ultrafiltration before reverse osmosis, the effect of pretreatment is better than that of mechanical filters, which not only protects reverse osmosis, reduces the number of cleaning times of reverse osmosis, but also increases the service life of reverse osmosis membrane. At the same time, it can also make the system run more stably and produce better water quality. the

It directly reuses the waste water from the production line to the production line itself, avoiding the problems of complex structure, large floor area, high cost and unsatisfactory treatment effect in the prior art. The invention has a good treatment effect, and can reuse more than 97% of the previously discharged or reused water to the production line, so that water resources can circulate in the production area, the least amount of new water can be introduced, and only a small amount of sewage can be treated as sewage. The mud is then harmlessly landfilled. And it occupies a small area and has a high degree of automation, and the comprehensive utilization rate of water resources reaches more than 97%. the

Description of drawings:

Accompanying drawing 1 is the system control diagram of the present utility model;

Accompanying drawing 2 is the structural diagram of PLC control system of the present utility model. the

Specific implementation method:

The system includes a collection tank (1), a booster pump (2), a pH adjustment tank (3), a water storage tank (4), a raw water pump (5), a bag filter (6), and an ultrafiltration device (7) , ultrafiltration water tank (9), high-pressure pump (10), primary reverse osmosis device (11), pure water tank (13), high-pressure pump (14), secondary reverse osmosis device (15), reuse water tank (17 ), booster pump (18), EDI device (19), EDI water tank (21), concentrated water tank (22), booster pump (23), sequential batch Fenton device (24), booster pump (25), Multimedia filter (26), activated carbon filter (27), ultrafiltration device (28), ultrafiltration water tank (30), high pressure pump (31), reverse osmosis device (32), dosing device (34), concentration Water pipeline (8), (12), (16), (20), (29), (33) and PLC control system are formed. the

Production process: Collect production wastewater in the pool (1) → booster pump (2) and dosing device (34) → pH adjustment pool (3) → reservoir (4), → raw water pump (5) → bag type Filter (6) → ultrafiltration device (7) → ultrafiltration water tank (9) → high pressure pump (10) → primary reverse osmosis device (11) → pure water tank (13) and concentrated water pipeline (12) enter the concentrated Water tank (22) → booster pump (23) → sequence batch type Fenton device (24) → booster pump (25) → multi-media filter (26) → activated carbon filter (27) → ultrafiltration device (28); The water in the ultrafiltration device (28) enters the ultrafiltration water tank (30) and concentrated water pipeline (29)→high pressure pump (31)→reverse osmosis device (32)→pure water tank (13);→pure water tank (13 )→high pressure pump (14)→secondary reverse osmosis device (15); 19) and concentrated water pipeline (20); EDI device (19) water production→EDI water tank (21). The ultrafiltration devices (7), (28) are hollow fiber membranes made of polysulfone or polyethersulfone, and the molecular weight cut-off is 10000 Daltons. The concentrated water discharged from the ultrafiltration device (7) is connected with the reservoir (4) and the concentrated water tank (22) through the concentrated water pipeline (8); the produced water of the ultrafiltration device (7) enters the ultrafiltration water tank (9), It is pumped into the primary reverse osmosis device (11) through the high pressure pump (10). The concentrated water discharged from the primary reverse osmosis device (11) is connected to the concentrated water tank (22) through the concentrated water pipeline (12), and the water produced by the reverse osmosis device (11) enters the pure water tank (13), and is pumped by the high pressure pump (14) Enter the secondary reverse osmosis device (15). The concentrated water discharged from the secondary reverse osmosis device (15) is connected to the ultrafiltration water tank (9) through the concentrated water pipeline (16), and the water produced by the reverse osmosis device (15) enters the reuse water tank (17), and passes through the booster pump (18 ) is pumped into the EDI device (19). The concentrated water discharged from the EDI device (19) is connected to the pure water tank (13) through the concentrated water pipeline (20), and the water produced by the EDI device (19) enters the EDI water tank (21) for use in photovoltaic production. The booster pump (23) pumps the waste water in the concentrated water tank (22) into the sequence batch type Fenton device (24), after the reaction, the booster pump (25) extracts the supernatant therefrom and pumps it into the multimedia filter (26), Its produced water directly enters the activated carbon filter (27), and its produced water enters the ultrafiltration device (28); the ultrafiltration device (28) produces water into the ultrafiltration water tank (30), and the ultrafiltration device (28) concentrate The water pipeline (29) is connected with the concentrated water tank (22). What placed in the sequential batch type Fenton device (24) is the mixed solution of hydrogen peroxide and ferrous sulfate, and its proportioning is: hydrogen peroxide 30%, ferrous sulfate 10%, all the other are water. The high-pressure pump (31) pumps water from the ultrafiltration water tank (30) into the reverse osmosis device (32), and the reverse osmosis produced water enters the pure water tank (13), and the concentrated water discharged passes through the concentrated water pipeline (33) and the concentrated water tank (22). and wastewater treatment system connection. the

The PLC control system is connected to control the collection pool (1), the booster pump (2), the pH adjustment pool (3), the water storage tank (4), the raw water pump (5), the bag filter (6), and the ultrafiltration device ( 7), ultrafiltration water tank (9), high-pressure pump (10), primary reverse osmosis device (11), pure water tank (13), high-pressure pump (14), secondary reverse osmosis device (15), reuse water tank (17), booster pump (18), EDI device (19), EDI water tank (21), dosing system (34), concentrated water reuse part and pipeline valve system; the concentrated water reuse part is connected to control the concentrated water tank (22), booster pump (23), sequencing batch Fenton system (24), booster pump (25), multi-media filter (26), activated carbon filter (27), ultrafiltration device (27), ultrafiltration Filter water tank (30), high-pressure pump (31), reverse osmosis system (32). the

As a preference, a bag filter with a filtration precision of 5 μm is set before ultrafiltration to filter part of the particulate matter, reduce the burden on the ultrafiltration system, reduce the cleaning frequency of the ultrafiltration system, and reduce the cost. Preferably, the concentrated water of the ultrafiltration device (7) is connected to the reservoir (4) and the concentrated water tank (22) through pipelines respectively. the

Preferably, the concentrated water of the ultrafiltration device (28) is respectively connected with the concentrated water tank (22) and the waste water treatment system through a pipeline (29). Considering improving the utilization rate of concentrated water and avoiding excessive accumulation of ion concentration. the

Preferably, the concentrated water of the primary reverse osmosis system (11) is connected to the concentrated water tank (22) through a pipeline (12). The concentrated water produced by the first-stage reverse osmosis device can be concentrated again because of its relatively low concentration, so as to improve the utilization rate of water. the

As preferably, the strong water of secondary reverse osmosis system (15) is connected ultrafiltration water tank (9) by pipeline (16). The concentrated water produced by the two-stage reverse osmosis device can be returned to the ultrafiltration water tank as the influent water of the first-stage reverse osmosis because its water quality is better than that of the ultrafiltration water, so as to improve the utilization rate of water. the

As a preference, a sequence batch Fenton system (24), a multi-media filter, and an activated carbon filter (20) are added to the concentration section to oxidize and remove COD through the Fenton system, and then block suspended solids through the multi-media filter, and through the adsorption of activated carbon Reducing the pollution of COD to the reverse osmosis membrane again, so as to increase the concentration ratio of reverse osmosis. the

Preferably, the concentrated water produced by the reverse osmosis device (32) in the concentration section is connected to the concentrated water tank (22) and the wastewater treatment system through a pipeline (33). The concentrated water produced by the concentrated reverse osmosis device can be partially returned to the concentrated water tank as the reverse osmosis feed water because the concentration is lower than the reverse osmosis inlet water requirement through discharge control, and part of it is discharged to the wastewater treatment system to improve water utilization. , while avoiding excessive concentration and damage to the reverse osmosis membrane components. the

Preferably, the concentrated water of the EDI device (19) is connected to the pure water tank (13) through a pipeline (20). The concentrated water produced by the EDI device can be returned to the pure water tank (13) as the inflow water of the secondary reverse osmosis for recycling because its water quality is better than that of the first-stage reverse osmosis system (11), thereby improving the utilization rate of water. the

Preferably, the ultrafiltration device adopts a hollow fiber membrane with a molecular weight cut-off of 6,000 to 50,000 Daltons, and the hollow fiber membrane is made of polysulfone or polyethersulfone material that is resistant to acid and alkali, pollution, and long service life. the

Preferably, the membrane element used in the reverse osmosis device is a rolled composite membrane. the

Preferably, the control system is a programmable PLC controller. The PLC controller is an electronic system device with the processor as the core. It is specially designed for industrial field applications. It has the characteristics of high reliability, strong anti-interference ability, simple use and convenient maintenance, which can reduce the design and construction of the control system. workload and reduce costs. The PLC controller controls the entire water treatment process, including the timing backwashing of the microfiltration device and ultrafiltration device, the timing flushing of the reverse osmosis device, and the booster pump is controlled according to the liquid level of the collection pool, intermediate water tank and reuse water tank And high pressure pump start and stop. the

Claims (9)

1. photovoltaic wastewater zero discharge system, it is characterized in that: it comprises collecting tank (1), topping-up pump (2), PH equalizing tank (3), water reservoir (4), raw water pump (5), deep bed filter (6), ultra-filtration equipment (7), ultrafiltration water tank (9), high-pressure pump (10), first-stage reverse osmosis device (11), pure water case (13), high-pressure pump (14), two-pass reverse osmosis device (15), reuse water tank (17), topping-up pump (18), EDI device (19), EDI water tank (21), dense water tank (22), topping-up pump (23), sequence batch (Fenton device (24), topping-up pump (25), more medium filter (26), activated charcoal filter (27), ultra-filtration equipment (28), ultrafiltration water tank (30), high-pressure pump (31), reverse osmosis unit (32), chemicals dosing plant (34), dense waterpipe (8), (12), (16), (20), (29), (33) and the PLC Controlling System form.

2. a kind of photovoltaic wastewater zero discharge as claimed in claim 1 system, it is characterized in that: described ultra-filtration equipment (7), (28) adopt polysulfones or polyether sulfone materials to make hollow-fibre membrane, and its molecular weight cut-off is 10000 dalton.

3. a kind of photovoltaic wastewater zero discharge as claimed in claim 1 system, it is characterized in that: the dense water that described ultra-filtration equipment (7) is discharged is connected with water reservoir (4) and dense water tank (22) by dense waterpipe (8); The product water of ultra-filtration equipment (7) enters ultrafiltration water tank (9), pumps into first-stage reverse osmosis device (11) through high-pressure pump (10).

4. a kind of photovoltaic wastewater zero discharge as claimed in claim 1 system, it is characterized in that: described first-stage reverse osmosis device (11) the dense water of discharging be connected with dense water tank (22) by dense waterpipe (12), reverse osmosis unit (11) produces water and enters pure water case (13), pumps into two-pass reverse osmosis device (15) through high-pressure pump (14).

5. a kind of photovoltaic wastewater zero discharge as claimed in claim 1 system, it is characterized in that: described two-pass reverse osmosis device (15) the dense water of discharging be connected with ultrafiltration water tank (9) by dense waterpipe (16), reverse osmosis unit (15) produces water and enters reuse water tank (17), pumps into EDI device (19) through topping-up pump (18).

6. a kind of photovoltaic wastewater zero discharge as claimed in claim 1 system, it is characterized in that: described EDI device (19) the dense water of discharging be connected with pure water case (13) by dense waterpipe (20), EDI device (19) product water enters EDI water tank (21) and uses for photovoltaic production.

7. a kind of photovoltaic wastewater zero discharge as claimed in claim 1 system, it is characterized in that: described topping-up pump (23) pumps into sequence batch (Fenton device (24) with waste water in the dense water tank (22), after reaction, topping-up pump (25) therefrom extracts supernatant liquor and pumps into more medium filter (26), it produces water and directly enters activated charcoal filter (27), and it produces water and enters ultra-filtration equipment (28) again; Ultra-filtration equipment (28) produces water and enters ultrafiltration water tank (30), and the dense water of ultra-filtration equipment (28) is connected with dense water tank (22) by dense waterpipe (29).

8. a kind of photovoltaic wastewater zero discharge as claimed in claim 1 system, it is characterized in that: described high-pressure pump (31) is drawn water from ultrafiltration water tank (30) and is pumped into reverse osmosis unit (32), reverse osmosis produced water enter pure water case (13) the dense water of discharging be connected with dense water tank (22) and Waste Water Treatment by dense waterpipe (33).

9. a kind of photovoltaic wastewater zero discharge as claimed in claim 1 system, it is characterized in that: the PLC Controlling System connects control and collects pond (1), topping-up pump (2), PH equalizing tank (3), water reservoir (4), raw water pump (5), deep bed filter (6), ultra-filtration equipment (7), ultrafiltration water tank (9), high-pressure pump (10), first-stage reverse osmosis device (11), pure water case (13), high-pressure pump (14), two-pass reverse osmosis device (15), reuse water tank (17), topping-up pump (18), EDI device (19), EDI water tank (21), medicine system (34), dense water reuse part and pipe valve system; Dense water reuse partly connects control dense water tank (22), topping-up pump (23), sequence batch (Fenton system (24), topping-up pump (25), more medium filter (26), activated charcoal filter (27), ultra-filtration equipment (27), ultrafiltration water tank (30), high-pressure pump (31), reverse osmosis system (32).

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