CN210286989U

CN210286989U - Reclaimed water recycling system

Info

Publication number: CN210286989U
Application number: CN201920991132.3U
Authority: CN
Inventors: 刘俊杰
Original assignee: Funing Xiexin Photovoltaic Technology Co ltd
Current assignee: Funing Xiexin Photovoltaic Technology Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-04-10
Anticipated expiration: 2029-06-27

Abstract

The utility model relates to a reuse of reclaimed water system, include: the flocculation filter, the security filter, the salt separation unit and the recycling water tank are connected in sequence; the salt separating unit is connected with a backwashing unit, the backwashing unit is connected to the flocculation filter and supplies water for the flocculation filter, the backwashing unit is provided with a first drain outlet for discharging redundant concentrated water, and the flocculation filter is provided with a second drain outlet for discharging waste water for cleaning the flocculation filter. The technical effects are as follows: the reclaimed water firstly passes through the flocculation filter to remove flocculent substances in the water, then passes through the security filter to remove relatively large particles in the water, and then passes through the salting unit to remove soluble electrolyte substances in the water, and the reclaimed water is recycled, so that the reclaimed water discharge amount of a sewage station can be reduced, and the pressure of a municipal sewage pipe network is reduced. Meanwhile, the concentrated water discharged from the salt separation unit can be washed by the backwashing unit through two-stage filtration to flush the flocculation filter, so that the concentrated water with lower turbidity is recycled.

Description

Reclaimed water recycling system

Technical Field

The utility model relates to a sewage treatment technical field especially relates to a reuse of reclaimed water system.

Background

In the process of slicing the silicon wafer, slicing workshop equipment can produce a large amount of sewage, the sewage is subjected to advanced treatment through a workshop sewage station, and the treated reclaimed water reaching the standard is discharged to a municipal sewage pipe network. The discharge of a large amount of reclaimed water can produce certain impact to the municipal sewage pipe network, and because the treatment capacity of the municipal sewage pipe network is limited, only a small part of the reclaimed water flowing to the municipal sewage pipe network is used for sanitary cleaning and greening, so that the waste of water resources is caused.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a reclaimed water recycling system for solving the problem of wasting reclaimed water resources generated by silicon wafer slicing.

A reclaimed water reuse system comprising: the flocculation filter, the security filter, the salt separation unit and the recycling water tank are connected in sequence; the salt separation unit is connected with a backwashing unit, the backwashing unit is connected to the flocculation filter and supplies water to the flocculation filter, the backwashing unit is provided with a first drain outlet, the first drain outlet is used for discharging redundant concentrated water, the flocculation filter is provided with a second drain outlet, and the second drain outlet is used for discharging waste water for cleaning the flocculation filter.

The technical scheme at least has the following technical effects: according to the reclaimed water recycling system provided by the technical scheme, a large amount of reclaimed water generated in the silicon wafer slicing process passes through the flocculation filter to remove flocculent substances in the water, the turbidity in the water is reduced, then relatively large particles in the water are removed through the cartridge filter, then soluble electrolyte substances in the water are removed through the salt separation unit, the salt content in the water is reduced, so that water meeting the water requirement of workshop procedures is obtained, and the part of water is recycled, so that the reclaimed water discharge amount of a sewage station can be reduced, and the pressure of a municipal sewage pipe network is reduced. Simultaneously, the concentrated water discharged from the salt separating unit is lower in turbidity due to two-stage filtration, and can be washed by the backwashing unit to flush the flocculation filter, so that secondary utilization of the concentrated water with lower turbidity is realized, and a large amount of water resources are saved.

In one embodiment, the front end of the flocculation filter is also connected with a raw water pump in series.

In one embodiment, the flocculation filter is further connected with a dosing device.

In one embodiment, a filtering water tank is arranged between the cartridge filter and the salt separating unit.

In one embodiment, the salt separation unit adopts a nanofiltration membrane or an electrodialysis membrane.

In one embodiment, the backwashing unit comprises a backwashing water tank connected with the salt separation unit, a backwashing pump connected with the backwashing water tank, and a backwashing valve connected with the backwashing pump.

In one embodiment, the backwashing unit further comprises a water quality detector for detecting the water quality value of the backwashing water tank.

In one embodiment, a first water pipe and a first valve for controlling the on-off of the first water pipe are arranged between the reuse water tank and the backwashing unit.

In one embodiment, the reuse water tank is further provided with a liquid level meter.

In one embodiment, the backwashing unit is further connected with a tap water port, and the tap water port is provided with a second valve for controlling the on-off of the tap water port.

Drawings

Fig. 1 is a schematic structural view of a water recycling system according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a water recycling system according to another embodiment of the present invention.

Wherein:

100. reclaimed water reuse system 110, raw water pump 120 and flocculation filter

122. A second sewage draining outlet 130, a security filter 140 and a filtering water tank

150. Salt separating unit 160, backwashing unit 162 and first sewage discharge port

170. Reuse water tank 180, dosing device 200 and reclaimed water

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, an embodiment of the present invention provides a reclaimed water recycling system 100, including: the flocculation filter 120, the cartridge filter 130, the salt separating unit 150 and the reuse water tank 170 are connected in sequence; wherein, divide salt unit 150 to be connected with backwash unit 160, backwash unit 160 is connected to flocculation filter 120 and supplies water for flocculation filter 120, and backwash unit 160 has first drain 162, and first drain 162 is used for discharging unnecessary thick water, and flocculation filter 120 has second drain 122, and second drain 122 is used for discharging the waste water that washs flocculation filter 120.

Since the flocculation filter 120 filters a large amount of flocs, the efficiency of the flocculation filter is affected by the deposition of the flocs, and therefore, the flocculation filter 120 needs to be backwashed. And because the water treated by the flocculation filter 120, the cartridge filter 130 and the salt separation unit 150 has relatively good water quality, the water can be used for backwashing the flocculation filter 120, so that the recycling rate of the water is improved. The cartridge filter 130 filters a large amount of particles, and thus, the filter element needs to be replaced periodically to improve the service life and filtering effect.

And discharging the wastewater generated by slicing the silicon wafer into a sewage station, and performing advanced treatment to obtain reclaimed water 200 meeting municipal discharge requirements. First, the reclaimed water 200 is discharged from the storage device of the sewage station into the flocculating filter 120, and flocculated substances in the water are removed, thereby reducing turbidity in the water. The water exiting the flocculation filter 120 is then discharged into a cartridge filter 130, which filters the relatively large particles in the water. The water discharged from the cartridge filter 130 is discharged to the salt separating unit 150, and the soluble electrolytes in the water are removed, thereby reducing the salt content of the water to meet the water requirement of the workshop process. The salt separating unit 150 forms recycled water and concentrated water, the recycled water is discharged to the recycled water tank 170 and is continuously used for workshop procedures, the recycled water is recycled, the discharge amount of the recycled water 200 in the sewage station is reduced, the pressure of the municipal sewage pipe network is reduced, and zero discharge of the municipal sewage pipe network is realized as much as possible. The concentrated water is discharged to the backwashing unit 160, and the concentrated water is filtered by the flocculation filter 120 and the cartridge filter 130 for the second time, so that the water quality is relatively good, the flocculation filter 120 can be washed and cleaned by the concentrated water, and when the backwashing is needed, the backwashing unit 160 is controlled to perform the backwashing operation. When the amount of the concentrate is large or needs to be discharged, part of the concentrate is discharged from the first drain port 162 of the backwashing unit 160. The backwashing unit 160 supplies the concentrated water backwashed by the flocculation filter 120, and when the washing is completed, discharges the concentrated water from the second drain outlet 122 of the flocculation filter 120.

Meanwhile, a waste water tank may be further provided in the reclaimed water reusing system 100 for receiving waste water discharged from the first drain outlet 162 of the backwashing unit 160 and the second drain outlet 122 of the flocculation filter 120 for centralized treatment.

It is understood that the components of the reclaimed water reusing system 100 are connected by a pipeline or other structure that enables the next-stage device to receive the water discharged from the previous-stage device.

The technical scheme at least has the following technical effects: according to the reclaimed water recycling system 100 provided by the technical scheme, a large amount of reclaimed water 200 generated in the silicon wafer slicing process firstly passes through the flocculation filter 120 to remove flocculent substances in the water, the turbidity of the water is reduced, then relatively large particles in the water are removed through the cartridge filter 130, then soluble electrolyte substances in the water are removed through the salting unit 150, the salinity of the water is reduced, so that water meeting the water requirement of workshop procedures is obtained, and the reclaimed water is recycled, so that the discharge amount of the reclaimed water 200 in a sewage station can be reduced, and the pressure of a municipal sewage pipe network is reduced. Meanwhile, the concentrated water discharged from the salt separating unit 150 has lower turbidity due to two-stage filtration, and can be washed by the backwashing unit 160 through the flocculation filter 120, so that the concentrated water with lower turbidity can be reused, and a large amount of water resources are saved.

In some embodiments, the front end of the flocculation filter 120 is also connected in series with the raw water pump 110. The front end is the position before the reclaimed water flows into the flocculating filter 120. In order to make the reclaimed water 200 flow to the flocculation filter 120 more smoothly, a raw water pump 110 is additionally arranged between the device for storing the reclaimed water in the sewage station and the flocculation filter 120, so that the fluidity of the reclaimed water 200 can be enhanced, and a good conveying effect is ensured.

In some embodiments, the flocculation filter 120 is further connected to a dosing device 180. The chemical adding device 180 is used for adding a flocculating agent to the flocculation filter 120 to ensure the effect of reducing turbidity of the flocculation filter 120, and can also add chemicals for acid and alkali, precipitation, sterilization and the like to assist cleaning of the flocculation filter 120 when the flocculation filter 120 is backwashed. The chemical adding device 180 is arranged between the raw water pump 110 and the flocculation filter 120, and chemicals are added through a water conveying pipe between the raw water pump 110 and the flocculation filter 120.

In some embodiments, a filtered water tank 140 is disposed between the cartridge filter 130 and the salt separation unit 150. In order to make the water passing through the security filter 130 have a buffer precipitation process, a filtering water tank 140 is arranged between the security filter 130 and the salt separating unit 150, so that the water flows to the salt separating unit 150 after passing through the buffer precipitation.

Since the water reaching the filtering water tank 140 has been filtered through the flocculation filter 120 and the cartridge filter 130 in two stages, the water quality is relatively good and can be used to backwash the flocculation filter 120. Accordingly, the filter tank 140 may also be connected in series to the backwash unit 160. Specifically, a water pipe and a valve for controlling the on-off of the water pipe are arranged between the filter water tank 140 and the backwashing unit 160. When backwashing with water in the filtered water tank 140 is required, the valve is opened. The water in the filtration water tank 140 is supplied to the flocculation filter 120 for washing by the control of the backwashing unit 160.

In some embodiments, the salt separation unit 150 employs a nanofiltration membrane or an electrodialysis membrane. The purpose of the salt separation unit 150 is to remove dissolved electrolyte species from the water to obtain a water quality that meets the water requirements for the plant process. In this embodiment, the salt separating unit 150 may adopt a nanofiltration membrane or an electrodialysis membrane. The nanofiltration membrane can intercept different-valence salts to form part of concentrated water and part of reuse water. The electrodialysis membrane can be a cation exchange membrane and/or an anion exchange membrane, and ions with different valences can selectively permeate to form part of concentrated water and part of recycled water. For example, when the amount of water in the system is 500m3/d, the concentrate and reuse water may be 200m3/d and 300m3/d (cubic meter per day), respectively.

In some embodiments, the backwash unit 160 includes a backwash water tank connected to the salt separation unit 150, a backwash pump connected to the backwash water tank, and a backwash valve connected to the backwash pump. The backwashing water tank is used for containing the concentrated water discharged from the salt separating unit 150, and when the concentrated water is large in volume or needs to be discharged, the first drain outlet 162 is opened to discharge the concentrated water. The backwash pump pumps out the concentrated water from the backwash water tank, and the backwash valve controls whether the concentrated water supplies water to the flocculation filter 120. The backwash pump draws water from the backwash tank and communicates to the flocculation filter 120 via a water conduit. The wastewater after the flocculation filter 120 is cleaned is discharged from the second drain outlet 122. During backwashing, chemicals for acid and alkali, precipitation, sterilization and the like can be added into the flocculation filter 120 through the chemical adding device 180 to enhance the cleaning effect.

Further, the backwashing unit 160 further includes a water quality detector to detect a water quality value of the backwashing water tank. The water quality detector is also called a TDS detector, can detect a water quality value, also called a TDS value (Total Dissolved Solids content), can determine the direction of the concentrated water in the backwash water tank according to a detection result, and if the water quality value is relatively high, the turbidity of the concentrated water is relatively large, and the concentrated water can be directly discharged through the first sewage outlet 162. If the water quality value is relatively low, which indicates that the turbidity of the concentrate is relatively low, the concentrate can be used to flush the flocculating filter 120.

Also, in some embodiments, the reuse water tank 170 is further provided with a liquid level meter. The liquid level meter can monitor the liquid level in the reuse water tank 170 constantly, prevent that the phenomenon of overflow waste from appearing in the too high water level, can inform operating personnel through modes such as light, sound in time to discharge the utilization.

In addition, as shown in fig. 2, when the turbidity of the concentrated water discharged from the salt separating unit 150 is relatively large, or the discharge amount of the concentrated water is relatively small, or the flocculation filter 120 needs to be deeply cleaned, the reuse water tank 170 may be connected in series to the backwashing unit 160 to deeply supplement or deeply clean the flocculation filter 120, so as to increase the service life of the flocculation filter 120. Specifically, a first water pipe and a first valve for controlling the on-off of the first water pipe are arranged between the reuse water tank 170 and the backwashing unit 160, and when water needs to be supplied to the reuse water tank 170, the first valve is opened.

In other embodiments, as shown in FIG. 2, the reclaimed water reuse system 100 can also include a tap water port connected in series to the backwash unit 160. When the turbidity of the concentrated water discharged from the salt separating unit 150 is relatively large, or the discharge amount of the concentrated water is relatively small, or deep cleaning of the flocculation filter 120 is required, a tap water inlet may be provided for the backwashing unit 160, and tap water is introduced from the outside to perform supplementary cleaning or deep cleaning of the flocculation filter 120, so as to increase the service life of the flocculation filter 120. Specifically, the tap water port is provided with a second valve for controlling the on-off of the tap water port, and when water supply of the tap water port is needed, the second valve is opened.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A reclaimed water recycling system, comprising:

the flocculation filter, the security filter, the salt separation unit and the recycling water tank are connected in sequence;

the salt separation unit is connected with a backwashing unit, the backwashing unit is connected to the flocculation filter and supplies water to the flocculation filter, the backwashing unit is provided with a first drain outlet, the first drain outlet is used for discharging redundant concentrated water, the flocculation filter is provided with a second drain outlet, and the second drain outlet is used for discharging waste water for cleaning the flocculation filter.

2. The reclaimed water recycling system according to claim 1, wherein a raw water pump is further connected in series to the front end of the flocculation filter.

3. The reclaimed water reuse system according to claim 1, wherein the flocculation filter is further connected with a dosing device.

4. The reclaimed water reuse system according to claim 1, wherein a filtered water tank is disposed between the cartridge filter and the salt separating unit.

5. The reclaimed water recycling system according to claim 1, wherein the salt separation unit employs a nanofiltration membrane or an electrodialysis membrane.

6. The reclaimed water reuse system according to claim 1, wherein the backwash unit comprises a backwash water tank connected to the salt separation unit, a backwash pump connected to the backwash water tank, and a backwash valve connected to the backwash pump.

7. The reclaimed water reuse system according to claim 6, wherein the backwash unit further comprises a water quality detector to detect a water quality value of the backwash water tank.

8. The reclaimed water recycling system according to claim 1, wherein a first water pipe and a first valve for controlling the on-off state of the first water pipe are arranged between the recycling water tank and the backwashing unit.

9. The reclaimed water reuse system according to claim 1, wherein the reuse water tank is further provided with a liquid level meter.

10. The reclaimed water reuse system according to claim 1, wherein the backwashing unit is further connected with a tap water port, and the tap water port is provided with a second valve for controlling the on-off of the tap water port.