CN108285210A - Integral type unpowered cyclone precipitates film filtering reactor - Google Patents

Abstract

The invention relates to an integrated non-powered swirl sedimentation membrane filtration reactor, comprising: a sedimentation filtration group: its height is lower than the water collection roof, including an integrally connected swirl grit chamber at the bottom and an inclined plate sedimentation at the top Among them, there is an inclined water inlet connected to the water collection roof above the swirl grit chamber and used to form a swirling water inlet. Several inclined filter slant plates are installed in the slant plate sedimentation tank. Between the two filter slant plates Arranged at intervals and form a filter gap connecting up and down to the inclined plate sedimentation tank; the membrane filter tank not higher than the sedimentation filtration group: its top is connected to the filter water outlet on the upper part of the inclined plate sedimentation tank, and a membrane filter is installed at the bottom of the membrane filter tank. The clear water outlet of the membrane filtration module is connected to a clear water pool. Compared with the prior art, the present invention combines sand settling and membrane filtration technology, utilizes the gravitational effect of roof rainwater, does not require external energy, and can quickly and efficiently collect, process and store roof rainwater.

Description

Integrated unpowered cyclone sedimentation membrane filtration reactor

technical field

The invention relates to a precipitation membrane filtration reactor, in particular to an integrated unpowered cyclone precipitation membrane filtration reactor.

Background technique

The shortage of fresh water resources is a problem that all mankind is facing, and rainwater has become one of the more and more important fresh water resources. Rainwater is lightly polluted water with low COD, N, and P content, low hardness, low metal content, and easy treatment. After treatment, it can be reused as drinking water, domestic miscellaneous water, and industrial water. Compared with the treatment and reuse of domestic sewage and the utilization of seawater desalination, the rainwater treatment process is simple, high in reliability, less polluted by bacteria and viruses, and more economical. By collecting and reusing rainwater after treatment, it can effectively alleviate the current situation of water shortage in my country.

Among the many ways of collecting rainwater, the collection of roof rainwater is the most common. The original roof of the house can be used, and there is no need to build various rainwater collection facilities, so no additional costs will be incurred. In addition, compared with the collection of rainwater runoff on the ground, the quality of roof rainwater is cleaner, with lower turbidity, COD, total nitrogen, and total phosphorus, and less pathogenic bacteria and virus pollution. Therefore, roofs are the most ideal water collection surface for rainwater.

The treatment and disposal process of rainwater is relatively simple. Generally, the water quality requirements of domestic miscellaneous water can be met without complicated treatment methods. The rainwater treatment process requires the removal of common pollutants in rainwater such as COD, P, N, suspended solids, harmful metal ions, etc. Generally, some physical and chemical treatment processes can achieve a good removal effect on the target pollutants. Common rainwater physical and chemical treatment methods include coagulation sedimentation, sand filtration process, ultrafiltration process, etc. Experiments show that the removal rate of SS by coagulation sedimentation, sand filtration and other processes generally reaches more than 90%, and the removal rate of COD is 40% Between -60%, the removal rate of NH ₄ ⁺ -N and NO ₃ ^- -N is about 40%, and the removal rate of metal ions reaches more than 80%. At present, many new processes or combined processes are also used in rainwater treatment, such as micro-flocculation process, double precipitation process, lightweight filter material + granular activated carbon combined process, etc. However, the above combined processes and equipment are usually relatively complicated and require additional power supplementation.

Contents of the invention

The object of the present invention is to provide an integrated unpowered cyclone sedimentation membrane filtration reactor in order to overcome the above-mentioned defects in the prior art.

The purpose of the present invention can be achieved through the following technical solutions:

An integrated unpowered cyclone precipitation membrane filtration reactor, including:

Sedimentation and filtration group: its height is lower than the water collection roof, including the integrated swirl grit chamber located below and the inclined plate sedimentation tank located above, wherein, the swirl grit chamber is also connected to the water collection roof and used for A slanted water inlet for swirling water intake is formed. Several slanted filter slant plates are installed in the slant plate sedimentation tank.

Membrane filtration tank not higher than the sedimentation filtration group: its top is connected to the filter water outlet on the upper part of the inclined plate sedimentation tank, and a membrane filter is installed at the bottom of the membrane filtration tank, and the clear water outlet of the membrane filter module is connected to the clear water tank.

The inclined water inlet forms a certain inclined angle with the cut surface of the water inlet point of the swirl grit chamber, and is mainly used to cooperate with the wall surface of the swirl grit chamber to form a swirling water inlet. Preferably, the inclination angle of the inclined water inlet satisfies that it forms an angle of 45° with the tangent plane of the water inlet point of the cyclone grit chamber.

Due to the height difference between the water collection roof and the sedimentation filter group, under the action of gravity, the rainwater enters the swirling grit chamber of the sedimentation filter group through the inclined water inlet at a certain flow rate, and is guided by the inclined water inlet. A swirling flow is formed on the grit chamber, and the swirling rainwater will increase the hydraulic retention time of the rainwater in the swirling grit chamber. At the same time, during the rainwater swirling process, most of the inorganic particles with a higher density than water and some organic suspended particles will It settles to the bottom of the pool and is discharged through the slag discharge pipe. The rainwater treated by the cyclone grit chamber flows up into the inclined plate sedimentation tank. During the upflow process, part of the inorganic particles and most of the organic suspended particles that have not settled in the cyclone grit chamber settle or are intercepted on the filter slope plate. , In addition, some inorganic salt pollutants can also be removed.

Preferably, the swirl grit chamber is funnel-shaped, and the bottom of the swirl grit chamber is connected to the outside world through a sand collection and slag discharge pipe with a control valve.

The inclined plate sedimentation tank is set above the swirl grit chamber, and the rainwater flows into the inclined plate sedimentation tank from bottom to top, and flows out from the top through the filter gap between the filter inclined plates. The filter inclined plates are preferably arranged in parallel, according to Shallow pool theory, each sloping filter plate is preferably set at an angle of 60° to the horizontal line.

Preferably, the membrane filter element is a cylindrical membrane barrel with upper and lower seals, and through-holes distributed on the side. A filter cloth covering the permeable holes. In this way, through the pressure difference formed on both sides of the filter cloth surface, that is, the reliable water head pressure, the rainwater is pressed into the membrane filter, and most of the inorganic particles, organic particles, pathogenic fungi and other pollutants are trapped and flow out from the membrane filter. The water is clear water.

There are many options for the pore size of the filter cloth, preferably, a filter cloth with a pore size of 10 μm is selected.

Preferably, the heights of the membrane filter tank, inclined plate sedimentation tank and filtered water outlet meet: the head pressure above the membrane filter can make water filter from the outside of the membrane filter to the inside of the membrane filter, and make the filtered clear water flow into the clear water pool.

Preferably, the bottom of the clear water pool is higher than the membrane filter, and its height above the membrane filter satisfies: the clear water in the clear water pool can enter the membrane filter in reverse, and seep out from the membrane filter Realize the backwash of the membrane filter. In addition, the upper part of the clean water pool can also be provided with an overflow port, and the bottom part can also be provided with a discharge pipe, and the treated clean water can be directly transferred for reuse or storage. Through the above design, because the design height of the clean water tank is higher than the membrane filter tank by a certain distance, in this way, in the backwashing link of the membrane filter, the pressure of the water flow in the clean water tank can be directly relied on to filter the filter elements (such as filter cloth, etc.) in the membrane filter. For backwashing, the backwashing water can further flow into the inclined plate sedimentation tank and the cyclone grit chamber for backwashing. This method of using gravity to realize backwashing also fully reflects the characteristics of unpowered operation.

Preferably, the bottom of the membrane filtration tank is also connected to the outside world through a slag discharge pipe of the membrane filtration tank with a control valve.

Preferably, a water collection tank is provided on the water collection roof, and the bottom drain of the water collection tank is sequentially provided with a building rainwater downpipe and a reactor water inlet pipe, and a three-way valve is installed at the bottom of the reactor water inlet pipe, and the three-way valve One of the water outlets is connected to the inclined water inlet, and the other water outlet points to the ground.

The integrated unpowered cyclone sedimentation membrane filter reactor of the present invention integrates rainwater collection, treatment and storage. Combining sand settling and membrane filtration technology, using the gravitational effect of roof rainwater, roof rainwater can be collected, processed and stored quickly and efficiently without additional energy. At the same time, the reactor simplifies the rainwater collection and treatment process. Rainwater quality has reached the standard for reclaimed water reuse.

Compared with the prior art, the present invention has the following advantages:

(1) Utilizing the water conservancy height difference of the rainwater system, there is no need for external power, and energy is saved.

(2) Integrate the collection, treatment and storage of rainwater into a whole, reducing the process of rainwater collection and treatment.

(3) Simple operation and low cost.

(4) After the rainwater is treated by the present invention, the water quality reaches the standard for reclaimed water.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the concrete structural representation of the present invention;

Fig. 3 is a schematic plan view of the present invention;

Fig. 4 is the plan view schematic diagram of inclined plate settling tank of the present invention;

Fig. 5 is the top view schematic diagram of cyclone grit chamber of the present invention;

Fig. 6 is the structural representation of the membrane filter element of the present invention;

Fig. 7 is a schematic top view of the membrane filter of the present invention;

Figure 8 is a schematic bottom view of the membrane filter of the present invention;

Fig. 9 is the installation sketch map of equipment and water collection roof of the present invention;

In the figure, 1-reactor inlet pipe, 2-swirl grit chamber, 3-inclined plate sedimentation tank, 4-membrane filter tank, 5-clear water tank, 6-grit and slag discharge pipe, 7-three-way valve , 8-inclined water inlet, 9-membrane barrel, 10-filter cloth, 11-connecting pipe, 12-membrane filter tank slag discharge pipe, 13-overflow port, 14-discharge pipe, 15-filter inclined plate, 16 -water permeable hole, 17-top surface of membrane bucket, 18-bottom surface of membrane bucket, 19-water outlet of membrane bucket, 20-water collection roof, 21-water collection tank, 22-building rainwater downspout.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

In one embodiment of the present invention, the integrated unpowered cyclone precipitation membrane filtration reactor, its structure is shown in Fig. 1-Fig. 3, mainly includes:

Sedimentation and filtration group: its height is lower than the water collection roof 20, including the swirl grit chamber 2 at the bottom and the inclined plate sedimentation tank 3 at the top connected in one piece, wherein, there is also a connection set above the swirl grit chamber 2 The water roof 20 is also used to form an inclined water inlet 8 for swirling water intake. Several inclined filtering sloping plates 15 are installed in the inclined plate sedimentation tank 3. The two filtering sloping plates 15 are arranged at intervals and formed with up and down connecting sloping plates. The filtration gap of sedimentation tank 3 is shown in Fig. 4;

The membrane filter tank 4 not higher than the sedimentation filter group: its top is connected to the filter water outlet on the upper part of the inclined plate sedimentation tank 3, and a membrane filter is installed at the bottom of the membrane filter tank 4, and the clear water outlet of the membrane filter module is connected to the clear water tank 5 .

The inclined water inlet 8 in the above embodiment forms a certain inclination angle with the cut surface of the water inlet point of the swirl grit chamber 2, and is mainly used to cooperate with the wall surface of the swirl grit chamber 2 to form a swirl-type water inlet. Preferably, The inclined angle of the inclined water inlet 8 satisfies that it forms an angle of 45° with the tangent plane of the water inlet point of the swirl grit chamber 2 .

Due to the height difference between the water collection roof 20 and the sedimentation filter group, under the action of gravity, the rainwater enters the top of the swirling grit chamber 2 of the sedimentation filter group through the inclined water inlet 8 at a certain flow rate, and is guided by the inclined water inlet 8. The rainwater forms a swirling flow on the swirling grit chamber 2, and the swirling rainwater will increase the hydraulic retention time of the rainwater in the swirling grit chamber 2. Particles and some organic suspended particles will settle to the bottom of the tank and be discharged. The rainwater treated by the cyclone grit chamber 2 flows up into the slant plate sedimentation tank 3. During the upflow process, part of the unsettled inorganic particles and most of the organic suspended particles in the cyclone grit chamber 2 settle or pass through the filter slant plate 15. The other part of the inorganic salt pollutants can also be removed.

In a preferred embodiment of the present invention, in order to reduce the head loss and increase the mixing effect, the cyclone grit chamber 2, the inclined plate sedimentation tank 3, the membrane filtration tank 4, etc. preferably adopt circular columnar bodies in cross section, For example, the swirl grit chamber 2 can be funnel-shaped, as shown in FIG. 5 , and the bottom of the swirl grit chamber 2 is connected to the outside world through a grit collection and slag discharge pipe 6 with a control valve.

The inclined plate sedimentation tank 3 is arranged above the swirling flow grit chamber 2, and the rainwater flows into the inclined plate sedimentation tank 3 from bottom to top, and flows out from the top through the filter gap between the filter inclined plates 15. In a preferred embodiment of the present invention In the embodiment, the sloping filter plates 15 are preferably arranged in parallel, and according to the shallow pool theory, each slant filter plate 15 is preferably set at an angle of 60° to the horizontal line.

In a preferred embodiment of the present invention, as shown in FIG. 6, the membrane filter element is a cylindrical membrane bucket 9 that is sealed up and down and has through water permeable holes 16 distributed on the sides. The membrane bucket top surface 17 and The structure of film bucket bottom surface 18 can refer to shown in Figure 7 and Figure 8, and the top of this film bucket 9 is provided with film bucket water outlet 19 (being clear water outlet), and further connects clear water tank 5 by connecting pipe 11, in film bucket 9 The side of the filter cloth 10 that covers the permeable hole 16 is wrapped.

In a preferred embodiment of the present invention, the heights of the membrane filter tank 4, the inclined plate sedimentation tank 3 and the filtered water outlet meet: the head pressure above the membrane filter can make water flow from the membrane filter to the membrane filter Inner filter, and make filtered gained clear water flow into clear water pool 5.

In this way, through the pressure difference formed on both sides of the surface of the filter cloth 10, that is, the reliable head pressure will press the rainwater into the membrane filter, and most of the pollutants such as inorganic particles, organic particles, and pathogenic fungi will be intercepted and released from the membrane filter. The water that flows out is clear water.

There are many options for the pore size of the filter cloth 10 , preferably, the filter cloth 10 with a pore size of 10 μm is selected.

In a preferred embodiment of the present invention, the bottom of the clear water tank 5 is higher than the membrane filter, and its height higher than the membrane filter meets: the clear water in the clear water tank 5 can reversely enter the membrane filter inside, and seep out from the inside of the membrane filter to achieve backwashing of the membrane filter. In addition, the upper part of the clean water pool 5 can also be provided with an overflow port 13, and the bottom can be provided with a discharge pipe 14, and the treated clean water can be directly transferred for reuse or storage. Through the above design, because the design height of the clean water tank 5 is higher than the membrane filter tank 4 by a certain distance, like this, in the backwashing link of the membrane filter element, the water flow pressure of the clear water tank 5 can be directly relied on, and the filter element (such as the filter element) in the membrane filter element can be directly controlled. cloth 10, etc.) for backwashing, in addition, the bottom of the clear water tank 5 and the bottom of the swirl grit chamber 2 can also be connected through pipelines, and the height of the clear water tank 5 is higher than the inclined plate filter tank by further designing (need to simultaneously Ensure that the height of the clear water tank 5 is lower than the height of the filtered water outlet), that is, the backwash water can further flow into the inclined plate sedimentation tank 3 and the swirling grit chamber 2 for backwashing, and this method of utilizing gravity to realize backwashing is also It fully embodies the characteristics of unpowered operation.

In a preferred embodiment of the present invention, the bottom of the membrane filtration tank 4 is also connected to the outside world through the slag discharge pipe 12 of the membrane filtration tank with a control valve.

In a preferred embodiment of the present invention, the water collection roof 20 is provided with a water collection tank 21, and the bottom outlet of the water collection tank 21 is provided with a building rainwater downpipe 22 and a reactor water inlet pipe 1 in sequence. A three-way valve 7 is installed at the bottom of the water inlet pipe 1, one water outlet of the three-way valve 7 is connected to the inclined water inlet 8, and the other water outlet points to the ground, as shown in FIG. 1 .

In this way, in the above-mentioned embodiment, through reasonable hydraulic calculations, using the head pressure of the roof rainwater and the head pressure of the clean water tank, the unpowered operation of the reactor can be realized in the whole process, and the sewage in the roof rainwater has a good effect. Removal.

The integrated unpowered cyclone precipitation membrane filtration reactor in the above-mentioned embodiments utilizes the hydraulic height difference of the rainwater system to first form a cyclone in the reactor to separate sediment, etc., and then flow up into the inclined tube sedimentation area. The clean water enters the subsequent membrane filter, and the filtered clean water enters the reuse pool. The membrane filtration system can use the rainwater reuse pressure for regular backwashing, and the sediment collected in the sludge chamber at the bottom of the reactor can be regularly emptied through the bypass pipe.

The above descriptions of the embodiments are for those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative efforts. Therefore, the present invention is not limited to the above-mentioned embodiments. Improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should fall within the protection scope of the present invention.

Claims (10)

1. a kind of integral type unpowered cyclone precipitates film filtering reactor, which is characterized in that including：

Precipitate filtering group：Its height less than catchmenting roofing (20), including the underlying rotational flow grit chamber (2) that is integrally connected to and The inclined-plate clarifying basin (3) being located above, wherein be additionally provided with connection above rotational flow grit chamber (2) and catchment and roofing (20) and be used for shape At the inclined intake (8) that spiral-flow type is intake, several pieces of inclined filtering inclined plates (15) are installed in inclined-plate clarifying basin (3), two Arranged for interval and it is formed with the time of filtration of connection inclined-plate clarifying basin (3) up and down between filtering inclined plate (15)；

Not higher than the membrane filtration pond (4) of precipitation filtering group：The filtered water outlet on its top connection inclined-plate clarifying basin (3) top, in film Filtering ponds (4) bottom is equipped with membrane filtration part, the clear water output connection clear water reserviors (5) of the membrane filtration module.

2. a kind of integral type unpowered cyclone according to claim 1 precipitates film filtering reactor, which is characterized in that described It is in 45° angle that the angle of inclination of inclined intake (8), which meets it with rotational flow grit chamber (2) water entry section,.

3. a kind of integral type unpowered cyclone according to claim 1 precipitates film filtering reactor, which is characterized in that described Rotational flow grit chamber (2) be in funnel-form, scum pipe is also taken by the sand setting of belt controling valve in the bottom of rotational flow grit chamber (2) (6) connection is extraneous.

4. a kind of integral type unpowered cyclone according to claim 1 precipitates film filtering reactor, which is characterized in that described Filtering inclined plate (15) in parallel arrangement, every piece filtering inclined plate (15) with horizontal line be in 60 ° of angles.

5. a kind of integral type unpowered cyclone according to claim 1 precipitates film filtering reactor, which is characterized in that described Membrane filtration part be top and bottom sealing, side be distributed with perforation permeable hole (16) cylindric film bucket (9), the film bucket (9) Top is equipped with the clear water output of connection clear water reserviors (5), has in the side wrap of film bucket (9) and covers the permeable hole (16) Filter cloth (10).

6. a kind of integral type unpowered cyclone according to claim 5 precipitates film filtering reactor, which is characterized in that described Filter cloth (10) aperture be 10 μm.

7. a kind of integral type unpowered cyclone according to claim 1 precipitates film filtering reactor, which is characterized in that described Membrane filtration pond (4), inclined-plate clarifying basin (3) and filtered water outlet height meet：Head pressure may make above membrane filtration part Water is filtered out of membrane filtration part extroversion membrane filtration part, and clear water obtained by filtering is made to flow into clear water reserviors (5).

8. a kind of integral type unpowered cyclone according to claim 1 or claim 7 precipitates film filtering reactor, which is characterized in that The bottom of the clear water reserviors (5) is higher than membrane filtration part, and it meets higher than the height of membrane filtration part：It is clear in clear water reserviors (5) Water can be redirected back into membrane filtration part, and ooze out the backwash realized to membrane filtration part from inside to outside from membrane filtration part.

9. a kind of integral type unpowered cyclone according to claim 1 precipitates film filtering reactor, which is characterized in that described Membrane filtration pond (4) bottom it is also extraneous by the connection of membrane filtration pond scum pipe (12) with control valve.

10. a kind of integral type unpowered cyclone according to claim 1 precipitates film filtering reactor, which is characterized in that institute The roofing that catchments (20) stated is equipped with catch basin (21), and the bottom discharge mouth of the catch basin (21) sets gradually building rain falling (22) and reactor water inlet pipe (1) are managed, triple valve (7) is installed in the bottom of reactor water inlet pipe (1), the triple valve (7) One water outlet connects the inclined intake (8), another water outlet is directed toward ground.