WO2018018656A1

WO2018018656A1 - Rainwater sewage interception device based on membrane separation technique

Info

Publication number: WO2018018656A1
Application number: PCT/CN2016/094078
Authority: WO
Inventors: 赵龙
Original assignee: 深圳朝伟达科技有限公司
Priority date: 2016-07-28
Filing date: 2016-08-09
Publication date: 2018-02-01
Also published as: CN106149852A

Abstract

Provided is a rainwater sewage interception device based on a membrane separation technique. The rainwater sewage interception device comprises an interception well, an overflow device, a membrane separation device, a filtered water reservoir, a filtered water control device and a backwashing device. The device can effectively remove nonpoint source pollution brought about by combined sewage or rainwater overflow during a storm period to keep a water body clear and transparent and minimize pollution, can be widely applied to municipal drainage, water body protection, water environment restoration, etc., and is used for the removal of pollutants, such as particulates, suspended matters, organics and heavy metals, from water, thus achieving the purpose of water body protection.

Description

Rainwater interception device based on membrane separation technology

Technical field

The present invention relates to the field of water treatment, and more particularly to a rainwater intercepting device based on a membrane separation technique.

Background technique

Taking Shenzhen as an example, according to the Shenzhen State Environmental Status Bulletin for the fourth quarter of 2013, the water quality of the Longgang River and Yantian River in Shenzhen River reached the national surface water V standard, and the water quality in the middle and lower reaches of other major rivers was inferior to the V standard. It is ammonia nitrogen and total phosphorus. Compared with the same period of last year, the water quality of Longgang River is kept as Class V; the water quality of Yantian River is changed from Class II to Class V, and the water quality category of Shawan River is changed from Class IV to Class V, and the water quality is obviously deteriorated. The water quality of Dasha River changed from V to V, and the water quality deteriorated. The pollution degree of Buji River and Xixiang River was significantly increased. The pollution degree of Xinzhou River was obviously aggravated, and the pollution degree of Pingshan River and Futian River was aggravated. The pollution degree of Tanghe River was significantly reduced, and the pollution degree of Guanlan River and Huanggang River was reduced; the water quality of Shenzhen River, Maozhou River and Wangmu River remained basically stable.

The rainfall carries a large amount of pollutants into the river, forming a clear boundary between black and yellow and yellow and blue; the pollution of the ocean by rain causes the dolphins to die. Therefore, how to control non-point source pollution is fundamental to protecting river water quality.

The Ministry of Water Resources' Water Resources Development Plan (2011-2015) pointed out that water conservancy investment is 1.8 trillion yuan, mainly used for flood disasters, drought and water shortage, farmland water power and rural drinking water safety. The basic investment of flood control and pipeline network engineering will exceed 1 Trillion. The Ministry of Environmental Protection's "Twelfth Five-Year Plan for National Environmental Protection" proposed that the investment in water pollution control was 436 billion yuan, of which the investment in the pipe network was 320 billion yuan. The Ministry of Housing and Construction's "Twelfth Five-Year Plan for the Reconstruction and Construction of Urban Water Supply Facilities and the Vision of Vision 2020" proposes that the total investment in urban water supply is 410 billion yuan, of which the investment in pipe network is 267.8 billion. The total investment of the three ministries in the 12th Five-Year Plan period reached 2.65 trillion. In addition, the 2014 Water Pollution Prevention Action Plan proposes to increase investment by 2 trillion yuan on the basis of the 12th Five-Year Plan, that is, the total water investment will reach 4.65 trillion.

Water environment management is the soft underbelly of China's environmental protection. For example, the management of Dianchi Lake has invested nearly 30 billion yuan, but the quality of water environment has not improved. Therefore, a new type of facility was invented for controlling surface source pollution to achieve the purpose of protecting water bodies.

The intercepting well is at the pivot of the entire intercepting combined drainage system and is the key structure of the entire system. Building. The choice of the form of the intercepting well and the internal structure are reasonable, and the impact on the intercepting effect and overflow capacity of the intercepting system is very important. At present, most of the intercepting wells used at home and abroad include jumping intercepting wells, intercepting trough intercepting wells, side rake intercepting wells, swirling valve intercepting wells, etc. In general, the intercepting wells and their improved types are both in technology and application. It has matured and achieved a better interception effect, but it only pays attention to the hydraulic effect and ignores the serious pollution caused by the dry season sewage and the rainwater at the beginning of the rainstorm. Foreign related research has been carried out, as well as reports on related products, such as the Jelleyfish Filter developed by Imbrium Systems of the United States, but still in its infancy. At present, there is no relevant report on the research and development of new intercepting wells with decontamination function in China.

Summary of the invention

In order to solve the problems in the prior art, the present invention provides a rainwater intercepting device based on a membrane separation technique.

The invention provides a rainwater intercepting device based on a membrane separation technology, comprising:

Interception well: used to collect sewage for interception, and discharge the intercepted sewage into a sewage treatment plant or river course;

The overflow device is configured to overflow the sewage exceeding the intercepting capacity of the intercepting well, and the overflowed sewage enters the membrane separating device;

Membrane separation device: used for filtering overflowed sewage to form filtered water;

Filtered water storage tank: for storing filtered water discharged from the membrane separation device;

Filtered water control device: when the water level of the filtered water storage tank is lower than the water level of the membrane separation device, the membrane separation device is controlled to discharge the filtered water into the filtered water storage tank; When the water level of the water storage tank is higher than the water level of the membrane separation device, the membrane separation device is controlled to discharge the filtered water into the natural water body;

Backwashing device: for reversing the water in the filtered water storage tank to the membrane separation device, and backwashing the membrane separation device.

As a further improvement of the present invention, the rainwater intercepting device further comprises:

The intercepting sludge sludge discharging device: the sludge for intercepting the intercepting well and the sludge collected by backwashing the membrane separating device are collectively transported to a garbage disposal site or other places.

Tank drain: used to drain water from the filtered water reservoir into a natural body of water.

As a further improvement of the present invention, the overflow device includes a weir, an overflow pipe, an overflow tank, and a restriction valve.

As a further improvement of the present invention, the membrane separation device is filtered by one of ultrafiltration, nanofiltration, reverse osmosis, and microfiltration, and the membrane material in the membrane separation device includes an organic membrane, an inorganic membrane, a ceramic membrane, Polymer film, multilayer film.

As a further improvement of the present invention, the rainwater intercepting device further includes an overflow sewage storage chamber for storing sewage exceeding a intercepting capacity of the intercepting well, the membrane separating device being located Overflow sewage storage indoors.

As a further improvement of the present invention, the intercepting well is provided with an inspection port for inspecting, cleaning and repairing the intercepting well.

The invention also provides a rainwater interception method based on membrane separation technology, comprising the following steps:

Interception step: used to collect sewage for interception, and discharge the intercepted sewage into a sewage treatment plant or river channel;

Overflow step: for overflowing sewage exceeding the intercepting capacity of the intercepting well, and overflowing sewage enters the membrane separation device;

Filtration step: filtering the overflowed sewage through a membrane separation device to form filtered water, and discharging the filtered water into the filtered water storage tank;

Control step: when the water level of the filtered water storage tank is lower than the water level of the membrane separation device, the membrane separation device is controlled to discharge the filtered water into the filtered water storage tank; when the filtered water storage tank is When the water level is higher than the water level of the membrane separation device, the membrane separation device is controlled to discharge the filtered water into the natural water body;

A backwashing step: for reversing the water in the filtered water reservoir to the membrane separation device, and backwashing the membrane separation device.

As a further improvement of the present invention, the rainwater interception method further comprises: transporting sludge intercepted by the intercepting well and sludge collected by backwashing the membrane separation device to a garbage disposal site or other places.

The invention has the beneficial effects that the rainwater intercepting device and the method based on the membrane separation technology of the invention can effectively remove the non-point source pollution caused by the confluent sewage or rainwater overflow during the rainstorm period, protect the water body from being clear and transparent, and minimize the pollution. And the invention can be widely applied to urban drainage, water body protection, water environment Repair, etc., the removal of particulates, suspended solids, organic matter, heavy metals and other pollutants in the water, from the purpose of water body protection.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the principle of a rainwater intercepting device of the present invention.

2 is a schematic diagram of one embodiment of a rainwater intercepting device of the present invention.

Figure 3 is a schematic diagram of another embodiment of the rainwater intercepting device of the present invention.

Detailed ways

As shown in FIG. 1 , the present invention discloses a rainwater intercepting device based on a membrane separation technology, comprising:

The rainwater intercepting device further comprises a intercepting sludge sludge discharging device, wherein the sludge intercepting the intercepting well and the sludge obtained by backwashing the membrane separating device are collectively transported to the garbage Handling fields or other places.

The rainwater intercepting device further includes a water storage drain device for discharging water in the filtered water storage tank into a natural water body.

The overflow device includes a weir, an overflow pipe, an overflow tank, and a restriction valve.

The membrane separation device is filtered by one of ultrafiltration, nanofiltration, reverse osmosis, and microfiltration. The membrane material in the membrane separation device includes an organic membrane, an inorganic membrane, a ceramic membrane, a polymer membrane, and a multilayer membrane. .

The rainwater intercepting device further includes an overflow sewage storage chamber for storing sewage exceeding a intercepting capacity of the intercepting well, the membrane separating device being located in the overflow sewage storage chamber.

The intercepting well is provided with an inspection port for inspecting, cleaning and repairing the intercepting well.

The invention also discloses a rainwater interception method based on membrane separation technology, comprising the following steps:

Interception step: used to collect sewage for interception, and discharge the intercepted sewage into a sewage treatment plant or river course.

The rainwater interception method further comprises: transporting sludge intercepted by the intercepting well and sludge obtained by backwashing the membrane separation device to a garbage disposal site or other place factory.

The sewage in the present invention includes combined sewage and rainwater, and the natural water body in the present invention includes rivers, lakes, reservoirs, and water bodies in the ocean.

The membrane separation device includes a water inlet and a water outlet, and the membrane separation device may be in various forms such as an integrated type, a combined type, and a field construction type. The membrane separation device may be metal, plastic, tantalum, reinforced concrete, masonry, or the like.

The filtered water storage tank can be various storage facilities such as underground, closed, open, or underground pipelines. The filtered water storage tank has separate inlet and outlet channels.

The water in the filtered water tank can be discharged directly into the natural water body, or discharged into a natural water body after disinfection.

The water in the filtered water storage tank can be discharged into the sewage pipeline and sent to the sewage treatment plant.

The filtered water storage tank provides backwashing water for the membrane separation device; the backwashing strength of the filtered water storage tank can be fixed or varied, and can also be determined according to the membrane material and facilities; the backwashing time of the filtered water storage tank can be fixed. , can also be changed, can also be determined according to the membrane material and facilities; the backwash head of the filtered water storage tank can be fixed or changed, or can be determined according to the membrane material and facilities; the filtered water tank backwashing method can be fixed It can also be changed or determined by membrane materials and facilities.

The intercepted sludge is from the membrane separation facility, and can also be discharged from the filtered water; the intercepted sludge can be discharged into the sewage pipe network after the rain, and the intercepted sludge can be manually cleaned regularly, and the intercepted sludge can be recycled. The intercepting sludge system can have a monitoring system, the intercepting sludge system can have an automatic control system, the intercepting sludge system can have a water level control system, the intercepting sludge system can have a deodorizing system, and the intercepting sludge system can have an anti-human falling system.

The shut-off well of the present invention can increase the retention efficiency by adding a flocculating agent. The rainwater intercepting device of the present invention can increase the air flotation aeration system, the cyclone separator, and the vacuum suction device.

After the rainstorm, the water in the filtered water storage tank flows back to the membrane separation device, and the membrane separation device is backwashed.

In the filtered water storage tank, a water level sensing device is provided for sensing the water level change.

In the membrane filtration device, a water flow and water level sensing device is provided for sensing changes in water volume (or rainfall).

At the intercepting well, a water flow sensing device is provided for sensing the change in water volume.

At the membrane separation unit, a sludge lift pump is provided for lifting the intercepted sludge to the sewage treatment plant. Or at the membrane separation unit, a sludge storage tank is provided for storing the intercepted sludge and periodically removing the trapped sludge.

At the water storage tank, the water level control, automatic backwashing after the rainstorm, or a lift pump station for backwashing the membrane separation device.

At the membrane separation unit, a control center is provided for controlling the process automation.

As shown in FIG. 2, as an embodiment of the present invention, in FIG. 2, A denotes combined sewage or rainwater, B denotes a combined sewage or rainwater inlet pipe, and C denotes a combined combined sewage or initial rainwater drainage pipe, to Sewage treatment plant; D means overflow weir, designed according to the interception multiple of the intercepting well; E means check valve or gate, used for backwashing drainage, not allowing confluent sewage to enter the overflow sewage storage room; F means overflow sewage Storage room, G means membrane separation device, H means filtered water enters filtered water storage tank, I means filtered water storage tank, J means drainage pipe of filtered water storage tank, K means filtered water discharge to nearby water body L indicates the intercepting well inspection port for inspection, cleaning and maintenance of the intercepting well; M indicates that the filtered water is backwashed back to the water, N indicates that the backwashing water flushes the dirt on the membrane separation device; P indicates the filtered sewage With the flushing sewage discharge port, it is a one-way valve structure.

As shown in FIG. 3, as another embodiment of the present invention, in FIG. 3, A denotes combined sewage or rainwater, B denotes a combined sewage or rainwater inlet pipe, and C denotes a combined combined sewage or initial rainwater drainage pipe, To the sewage treatment plant; D means overflow weir, designed according to the interception multiple of the intercepting well; E means check valve or gate, used for backwashing drainage, not allowing confluent sewage to enter the overflow sewage storage room; F means overflow Sewage storage room, G means membrane separation device, H means filtered water enters filtered water storage tank, I means filtered water storage tank, J means drainage pipe of filtered water storage tank, K means filtered water discharge to the nearest Water body, L indicates the inspection port of the intercepting well, used for inspection, cleaning and maintenance of the intercepting well; M indicates that the filtered water is backwashed back to the water, N indicates that the backwashing water flushes the dirt on the membrane separation device; O indicates the sewage lifting The pump is used to discharge the sewage when it is returned to the flush; P represents the filtered sewage and the backwashing sewage discharge port, which is a one-way valve type structure; Q represents the sewage pump suction pipe, and the water is taken from the overflow sewage storage room; R represents the sewage Pump out water pipe, filter Mud Discharge with the backwash water into the sewage treatment plant.

The rainwater intercepting device and method based on the membrane separation technology of the invention can effectively remove the non-point source pollution caused by the confluent sewage or rainwater overflow during the rainstorm period, protect the water body from being clear and transparent, and minimize the pollution; and the invention can be widely applied In the urban drainage, water protection, water environment repair, etc., the removal of particulate matter, suspended matter, organic matter, heavy metals and other pollutants in the water, from the purpose of water body protection.

The above is a further detailed description of the present invention in connection with the specific preferred embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Claims

A rainwater intercepting device based on a membrane separation technology, comprising:

Interception well: used to collect sewage for interception, and discharge the intercepted sewage into the sewage treatment plant;

The overflow device is configured to overflow the sewage exceeding the intercepting capacity of the intercepting well, and the overflowed sewage enters the membrane separating device;

Membrane separation device: used for filtering overflowed sewage to form filtered water;

Filtered water storage tank: for storing filtered water discharged from the membrane separation device;

Filtered water control device: when the water level of the filtered water storage tank is lower than the water level of the membrane separation device, the membrane separation device is controlled to discharge the filtered water into the filtered water storage tank; When the water level of the water storage tank is higher than the water level of the membrane separation device, the membrane separation device is controlled to discharge the filtered water into the natural water body;

Backwashing device: for reversing the water in the filtered water storage tank to the membrane separation device, and backwashing the membrane separation device.
The rainwater intercepting device according to claim 1, wherein the rainwater intercepting device further comprises: a shutoff sludge sludge discharging device: sludge for intercepting the intercepting well, and the membrane separating device The sludge obtained by backwashing is discharged into a sewage treatment plant.
The rainwater intercepting device according to claim 1, wherein the rainwater intercepting device further comprises: a water storage drain device for discharging water in the filtered water storage tank into a natural water body.
The rainwater intercepting device according to claim 1, wherein the overflow device comprises a weir, an overflow pipe, an overflow tank, and a restriction valve.
The rainwater intercepting device according to claim 1, wherein the membrane separation device performs filtration using one of ultrafiltration, nanofiltration, reverse osmosis, and microfiltration, and the membrane material in the membrane separation device includes Organic film, inorganic film, ceramic film, polymer film, multilayer film.
The rainwater intercepting device according to claim 1, wherein the rainwater intercepting device further comprises an overflow sewage storage chamber, wherein the overflow sewage storage chamber is configured to store sewage exceeding a intercepting capacity of the intercepting well The membrane separation device is located in the overflow sewage storage chamber.
The rainwater intercepting device according to claim 6, wherein the intercepting well is provided with an inspection port. The inspection port is used to inspect, clean up, and repair the intercepting well.