CN214031976U

CN214031976U - Building rainwater circulation purifier

Info

Publication number: CN214031976U
Application number: CN202022188176.8U
Authority: CN
Inventors: 唐利; 王策; 姚志勇
Original assignee: Shanghai Jianyuan Water Ecological Environment Engineering Co ltd
Current assignee: Shanghai Jianyuan Water Ecological Environment Engineering Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-08-24
Anticipated expiration: 2030-09-29

Abstract

The utility model discloses a building rainwater circulation purification device, which is characterized by comprising a rainwater collection device, a rainwater purification device and a rainwater utilization device, wherein the rainwater collection device and the rainwater purification device are arranged underground; the rainwater purification device comprises a sand filtration tank, a microporous filter, an ultrafiltration filter and a disinfection device which are connected in sequence; the rainwater utilization device comprises a clean water tank and a waterscape pool, wherein the clean water end of the rainwater purification device is connected with the clean water tank, and the clean water tank is connected with the waterscape pool and a reclaimed water pipeline. The utility model discloses to the purification of rainwater, store and utilize on the spot and can improve the humidity and the microclimate of the peripheral soil in building and air, alleviate urban heat island effect, build comfortable office environment.

Description

Building rainwater circulation purifier

Technical Field

The utility model belongs to the technical field of rainwater cyclic utilization, concretely relates to building rainwater circulation purifier.

Background

In the present day that the call sound of people with nature and harmony is higher and higher, the water body plays an important role as an intermediary in the space of a building, and the water body can form a poetic and humanized space by combining with other elements. The water can create an environment which influences the emotion of people, and the static water not only has a mirror reflection effect, but also has the effects of purifying the environment, planning the space, expanding the space and enriching the environmental color and the environmental atmosphere.

The large-area buildings and the hard pavement outside the buildings cover the original natural soil layer, the application of some stainless steel paving materials replaces the natural soil surface, if proper measures are not taken, the natural penetration of rainwater can be prevented, the conversion of surface water to underground water is influenced, and rainwater resources are lost, so that the design principle of green ecology and the value concept of sustainable development are violated. Meanwhile, a large amount of water is consumed for garage washing, greening irrigation, road sprinkling, water scene replenishing and the like of a building, and if tap water is used, a large amount of running cost is required, and a large amount of drinking water resources are wasted.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a building rainwater circulation purifier, the utility model discloses can building top and the peripheral rainwater of building collect and utilize, reduce the loss of rainwater in the building place, improve place self retaining ability.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a building rainwater circulation purification device, which comprises a rainwater collection device, a rainwater purification device and a rainwater utilization device, wherein the rainwater collection device and the rainwater purification device are both arranged underground,

the rainwater collecting device comprises a rainwater collecting pipe, a safety flow dividing well, a flow discarding filtering device, a valve well and a rainwater collecting pool which are sequentially connected;

the rainwater purification device comprises a sand filtration tank, a microporous filter, an ultrafiltration filter and a disinfection device which are connected in sequence;

the rainwater utilization device comprises a clean water tank and a waterscape pool, wherein the clean water end of the rainwater purification device is connected with the clean water tank, and the clean water tank is connected with the waterscape pool and a reclaimed water pipeline.

As an optimized technical scheme, the rainwater collecting tank adopts a concrete tank body, a water inlet of the rainwater collecting tank is arranged on the upper portion of the rainwater collecting tank, a sludge discharge pump is arranged at the bottom of the rainwater collecting tank, and an overflow port is formed in the top of the rainwater collecting tank.

As a preferred technical scheme, a rainwater recycling pressure pump and a coagulation dosing device are arranged between the rainwater collecting tank and the sand filter tank.

As a preferred technical scheme, a turbidity on-line monitoring device and a residual chlorine on-line monitoring device are arranged at the clear water end of the rainwater purification device.

As a preferred technical scheme, the clean water tank comprises a first clean water tank and a second clean water tank, the first clean water tank is connected with a reclaimed water pipeline, the second clean water tank is connected with a waterscape pool, the first clean water tank is connected with a tap water replenishing pipeline, and the first clean water tank is communicated with the second clean water tank through a pipeline with a valve.

As a preferable technical scheme, the first clear water tank is connected with a back washing end of the ultrafiltration filter through a back washing pump, and a concentrated water end of the ultrafiltration filter is connected with the rainwater collecting tank.

As the preferred technical scheme, the clear water end of the ultrafiltration filter is connected with a drug washing water tank through a valve, the drug washing water tank is connected with a drug washing filter, the drug washing filter is connected with the ultrafiltration filter, and a tap water replenishing port is arranged on the drug washing water tank.

As preferred technical scheme, the waterscape pond encircles the building setting, be provided with the connecting band between waterscape pond and the building, the connecting band is the permeable structure, and the below of connecting band is provided with the retaining groove, is provided with the honeycomb duct in the retaining groove, and the honeycomb duct is connected to rainwater manifold.

Preferably, the surface of the connecting belt is lower than the level of the road surface and higher than the level of the surface of the waterscape pool.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses to the purification of rainwater, store and utilize on the spot and can improve the humidity and the microclimate of the peripheral soil of building and air, alleviate urban heat island effect, build comfortable office environment, the implementation of the relevant view measure of rainwater utilization makes residential quarter's view type and space level abundanter.

(2) The utility model discloses well rainwater is through preliminary purification filtration back, receives by "rainwater bank" at last and collects the rainwater. The rainwater bank is a mode combining rainwater storage and landscape water body construction, and is designed in a mode of combining a clear water recycling tank and a mirror water landscape, wherein the clear water recycling tank is mainly used for rainwater short-time storage and regulation, and the mirror water landscape is mainly used for rainwater long-time storage and landscape display.

(3) The utility model discloses simulate natural rainwater's circulation process, collected from the surface runoff, the transmission purifies way and the three stage of rainwater saving system is started, make full use of rainwater is its water source as the waterscape, has formed one set of complete waterscape system with it, has reduced the maintenance and the administrative cost in later stage, has the meaning of practicing thrift economy.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flow chart of the rainwater circulation purification device for the building.

Fig. 2 is the structure schematic diagram of the building rainwater circulation purification device of the utility model.

Fig. 3 is the structure schematic diagram of the rainwater collecting tank of the utility model.

Fig. 4 is a schematic structural diagram of the first clean water tank of the present invention.

Fig. 5 is a schematic structural view of the second clean water tank of the present invention.

Fig. 6 is a schematic structural view of the waterscape pool and the connecting band of the present invention.

Wherein the reference numerals are specified as follows: the device comprises a connecting belt 1, a waterscape pool 2, a basement roof 3, a waterproof coating film 4, a bottom waterproof coiled material 5, a lower waterproof coiled material 6, an upper waterproof coiled material 7, fiberglass cloth 8, a bottom plate 9, a reinforced concrete structural slab 10, a waterproof mortar layer 11, a grid ditch cover plate 12, a cobble layer 13, a hydrophobic structural slab 14, geotextiles 15, a soil ramming layer 16, a gravel cushion layer 17, supporting angle steel 18, a high-molecular waterproof layer 19, a cement mortar bonding layer 20, a stone facing 21, a safe diversion well 22, a rainwater collection pipe 23, an overflow pipe 24, a drainage filtering device 25, a valve well 26, a rainwater collection pool 27, a sludge discharge pump 28, an overflow port 29, a rainwater recycling pressure pump 30, a concrete dosing device 31, a sand filtration tank 32, a microporous filter 33, an ultrafiltration filter 34, a drug washing water tank 35, a drug washing filter 36, a disinfection device 37, a turbidity online monitoring device 38, a residual chlorine online monitoring device 39, a residual chlorine online monitoring device, a water content monitoring device, a quality monitoring device, a, A first clean water tank 40, a second clean water tank 41, a back washing pump 42, a tap water replenishing port 43 and a lighting lamp 44.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

First, this embodiment provides a building rainwater circulation purifier, and this rainwater circulation purifier includes rainwater collection device, rainwater purifier and rainwater utilization device, and rainwater collection device, rainwater purifier all set up in the underground. The rainwater collecting device comprises a rainwater collecting pipe 23, a safe flow dividing well 22, a flow discarding filtering device 25, a valve well 26 and a rainwater collecting pool 27 which are connected in sequence. The rainwater purification device comprises a sand filter tank 32, a microporous filter 33, an ultrafiltration filter 34 and a disinfection device 37 which are connected in sequence. The rainwater utilization device comprises a clean water tank and a waterscape pool 2, wherein the clean water end of the rainwater purification device is connected with the clean water tank, and the clean water tank is connected with the waterscape pool 2 and a reclaimed water pipeline.

The following description will be made by taking a newly developed bank headquarters building in the upper sea as an example. The newly developed large-area building and hard pavement of the headquarters of the bank cover the original natural soil layer, and the application of some waterproof pavement materials replaces the natural soil surface. If no proper measures are taken, the natural infiltration of rainwater can be prevented, the natural conversion of surface water to underground water is influenced, and rainwater resources are lost, so that the design principle of green ecology of a building of a headquarter of a newly developed bank and the value concept of sustainable development of the newly developed bank are violated. Meanwhile, the large amount of water is consumed for the flushing of the headquarters building garage, greening irrigation, road watering, waterscape water replenishing and the like, and if tap water is used, the operation cost is high, and the waste of a large amount of drinking water resources is caused. The annual precipitation of Shanghai city is about 1271.9mm, the rainfall is abundant, and favorable conditions are provided for rainwater collection.

The design of waterscape structure includes three aspects of rainwater collection, rainwater purification and rainwater utilization, and its concrete step is as follows:

step one, collecting and collecting roof rainwater, surface rainwater and underground rainwater, and storing the collected rainwater in a rainwater collecting tank 27.

The large catchment area of the roof of the headquarters building and the large runoff quantity generated are important sources for collecting rainwater. The content of pollutants in roof rainwater is relatively low, and the resource utilization value is high. The roof rainwater can be utilized in two modes, one mode is that rainwater on a common roof is collected, the other mode is that the rainwater on the common roof is collected, the roof of a headquarters building is built into a roof garden, compared with a quick drainage mode for collecting rainwater on the common roof, the green roof is safer, and the green structure of the roof can accumulate rainwater and reduce rainwater runoff. This embodiment collects the rainwater as the raw water through setting up 87 type rainwater hoppers on tower roof, skirt house roof, and the rainwater after collecting gathers to rainwater collecting tank 27 in through the pipeline.

The surface runoff formed by rainwater in the headquarters building mainly comprises rainwater runoff generated by a hard ground and a landscape green land, and the rainwater is introduced into the rainwater collecting tank 27 by mainly adopting a water pipe or a groove aiming at the surface runoff.

In conventional building design, rainwater penetrating into the ground is often drained away by connecting to a drainage blind ditch and a water delivery pipe of a municipal pipeline. In this embodiment, the underground rainwater is collected by the blind drain and the water pipe and guided into the rainwater collecting tank 27.

And step two, performing rainwater purification treatment in the rainwater collection tank 27 to obtain clear water.

In the process of rainwater formation and falling, soluble gas, metal ions, suspended particles and other harmful substances in the atmosphere can be mixed into rainwater, the rainwater on the roof can be polluted to different degrees under the influence of roof materials, pollutants in surface runoff mainly come from scouring of the rainwater in the process of transmission movement to the surface of the ground, and accordingly surface sediments can also influence the quality of the rainwater. In order to ensure the quality of water and perfect mirror effect, safe and reasonable purification measures are required to be taken to purify the rainwater. In this embodiment, the purification process of rainwater is as follows: and the rainwater in the step two is collected and then is connected to a safe diversion well 22 through a rainwater collection pipe 23, the safe diversion well 22 is arranged outdoors downstairs of a headquarters building, an overflow pipe 24 is arranged in the safe diversion well 22, and the overflow pipe 24 has the function of directly discharging the rainwater from the overflow pipe 24 when the water flow is excessively large instantly. The safe flow-dividing well 22 is connected with a flow-discarding filter device 25, and is used for discarding initial rainwater and large particle impurities, the flow-discarding filter device 25 is connected with a valve well 26, the valve well 26 is connected with a rainwater collecting tank 27, the valve well 26 is used for cutting off a valve of a water inlet pipe when the liquid level in the rainwater collecting tank 27 reaches the highest liquid level, and rainwater is directly discharged to an outdoor rainwater pipe network. Rain waterThe water collecting tank 27 is constructed of concrete and has an effective volume of 200m³The highest water level is 3.6m, and decorative materials are paved outside the concrete pool body. Wherein, the water inlet setting of rainwater collecting tank 27 is on the upper portion of rainwater collecting tank 27, and this kind of mode of setting can prevent to break away the sedimentary silt in rainwater collecting tank 27 bottom when rainwater gets into rainwater collecting tank 27. The rainwater collecting tank 27 is internally provided with two sludge pumps 28 which are used and prepared at one time, the collecting sludge pumps 28 are periodically started to clean sludge deposited in the rainwater collecting tank 27, and the top of the rainwater collecting tank 27 is provided with an overflow port 29 which is connected to an outdoor rainwater pipe network. The rainwater to be purified in the rainwater collection pool 27 is sucked through the absorption bell mouth and then enters the sand filtration tank 32 through the rainwater recycling pressure pump 30, the sludge discharge pump 28 is started and sludge discharge is completed, the rainwater recycling pressure pump 30 is started, simultaneously, a coagulant is added into the sand filtration tank 32 by the coagulation dosing device 31 to be mixed with the rainwater, the outlet water of the sand filtration tank 32 sequentially enters the microporous filter 33 and the ultrafiltration filter 34, and the concentrated water end of the ultrafiltration filter 34 is discharged or flows back to the rainwater collection pool 27 for circular purification treatment. In order to ensure the safety of the discharged water, a disinfectant is added to the clean water end of the ultrafiltration filter 34 through a disinfection device 37, meanwhile, a turbidity online monitoring device 38 and a residual chlorine online monitoring device 39 are arranged at the clean water end to monitor the quality of the produced water, and when the water quality is poor, the ultrafiltration filter 34 is backwashed. The clear water end of the ultrafilter 34 is connected to a first clear water tank 40 and a second clear water tank 41, the first clear water tank 40 having an effective volume of 18m³The water outlet pipe is connected with a reclaimed water pipeline for greening watering and garage washing. The effective volume of the second clear water tank 41 is 9m³And the water outlet pipe is connected with a waterscape machine room for replenishing water for special waterscape. The first clear water tank 40 is connected with a tap water replenishing pipeline, and the first clear water tank 40 is communicated with the second clear water tank 41 through a pipeline with a valve. When any clear water tank reaches a set low water level, the rainwater recycling pressure pump 30 and the filtering equipment are started to purify rainwater, and when the rainwater collecting tank 27 and the clear water tank are both at the low water level, a tap water replenishing pipe is opened to replenish water. When the first clean water tank 40 and the second clean water tank 41 are both at a high water level, the filtering apparatus stops operating.

Meanwhile, the first clean water tank 40 is connected with the ultrafiltration filter 34 through a backwash pump 42, the clean water end of the ultrafiltration filter 34 is connected with the chemical washing water tank 35 through a valve, the chemical washing water tank 35 is connected with the chemical washing filter 36, the chemical washing filter 36 is connected with the ultrafiltration filter 34, and the chemical washing water tank 35 is provided with a tap water replenishing port 43.

The backwash process of the ultrafiltration filter 34 is as follows:

under normal conditions: when the turbidity online monitoring device 38 and the residual chlorine online monitoring device 39 detect that the water quality is poor, the ultrafiltration filter 34 is backwashed, water in the first clean water tank 40 and the first clean water tank 40 is connected to the ultrafiltration filter 34 through the backwash pump 42, clean water is stored in the chemical washing water tank 35, a bactericide is added into the ultrafiltration filter 34 through the chemical washing filter 36, and water after backwashing of the ultrafiltration filter 34 is discharged into an outdoor rainwater pipe network.

When the first clean water tank 40 and the second clean water tank 41 are in water shortage condition: the first clean water tank 40 is connected with a tap water replenishing pipeline to replenish water into the first clean water tank, the tap water replenishing port 43 on the chemical washing water tank 35 continuously replenishes water, and the water in the chemical washing water tank 35 flows into the ultrafiltration filter 34 through the chemical washing filter 36 to perform backwashing on the ultrafiltration filter 34.

Step three, storing clear water in a rainwater recycling clear water tank; conveying the water in the clear water tank into a waterscape pool 2 to present a static waterscape; the waterscape pool 2 is arranged around a building, a connecting belt 1 is arranged between the waterscape pool 2 and the building, the connecting belt 1 is of a water permeable structure, a water storage groove is arranged below the connecting belt 1, a flow guide pipe is arranged in the water storage groove, and the flow guide pipe is connected to the rainwater collecting pipe 23. The surface of the connecting belt 1 is lower than the elevation of the road surface and higher than the elevation of the surface of the waterscape pool 2. The connecting belt 1 is arranged, so that on one hand, the rainwater on the ground surface is prevented from directly flowing into the waterscape pool 2 to pollute the water body; on the other hand, can collect the earth's surface rainwater, realize the rainwater circulation.

During the construction of the waterscape pool 2, the narrowest part of the waterscape plane is selected as a partition point, the waterscape pool 2 is divided into 5 areas for construction, the areas can be constructed in parallel after being partitioned, the construction period is shortened, and the construction of each area block comprises the following steps:

s1, paving the bottom plate 9; the bottom plate 9 is made of fine stone concrete plate. The strength grade of the fine stone concrete is C20, internal formula

The 6@200 bidirectional rib is paved with the thickness not more than +/-0.5% of the designed thickness, the thickness of the thinnest part is 50mm, a base layer is paved in a leveling way at the uneven or gradient position, and a contraction joint is arranged between the fine stone concrete slab and the fine stone concrete slab, so that irregular cracks cannot be generated when the fine stone concrete slab contracts. Before the bottom plate 9 is paved, a waterproof coating film 4, a lower waterproof coiled material 6, an upper waterproof coiled material 7 and glass fiber cloth 8 are paved in sequence. The waterproof coating 4 is a polyurethane waterproof coating 4 with the thickness of 2mm, the lower waterproof coiled material 6 is an ethylene propylene diene monomer waterproof coiled material with the thickness of 1.5mm, and the upper waterproof coiled material 7 is an ethylene propylene diene monomer root-resistant waterproof coiled material with the thickness of 1.5 mm. The bottom plate 9 is laid to a thickness of 200mm at a position of the basement roof 3, and the bottom plate 9 is laid to a thickness of 350mm at a position of the basement roof 3 to prevent uneven settlement. The basement top plate 3 is of a self-waterproof structure, and the waterproof grade is P6.

And S2, laying the hydrophobic structure plate 14.

S3, laying a rammed earth layer 16, and arranging a geotextile 15 between the rammed earth layer 16 and the hydrophobic structure plate 14.

And S4, paving the gravel cushion layer 17.

S5, laying the reinforced concrete structural slab 10 with the thickness of 60 mm; one side of the reinforced concrete structure plate 10 close to the connecting band 1 is protruded to form a pool structure.

And S6, paving a cement mortar bonding layer 20, and paving a high-molecular waterproof layer 19 with the thickness of 4mm before paving the cement mortar bonding layer 20. The bulge of the cement mortar bonding layer 20 close to one side of the connecting strip 1 is positioned at the side part to form a supporting block of the stone veneer 21 for vertical paving, the distance between the supporting block and the bottom of the cement mortar bonding layer 20 is equal to the thickness of the stone veneer 21, and the length of the supporting block is less than or equal to the thickness of the stone veneer 21.

And S7, paving the stone facing 21. The stone facing 21 is made of basalt, belongs to a low-radiation and environment-friendly product, is black and black, has a condensed and elegant tone, accumulates a 100mm water layer on the stone facing 21, and reflects a tower with a main white tone on black paving to form a beautiful mirror surface water scene.

The construction of the connecting strip 1 comprises the following steps:

step 1, laying a bottom plate 9; the bottom plate 9 is made of fine stone concrete plates. Fine stone concrete panel strength grade C20, interior fitting

The 6@200 bidirectional rib is paved with the thickness not more than +/-0.5% of the designed thickness, the thickness of the thinnest part is 50mm, a base layer is paved in a leveling way at the uneven or gradient position, and a contraction joint is arranged between the fine stone concrete slab and the fine stone concrete slab, so that irregular cracks cannot be generated when the fine stone concrete slab contracts. The bottom plate 9 is made of fine stone concrete plates. Before the bottom plate 9 is paved, a waterproof coating film 4, a bottom waterproof coiled material 5, a lower waterproof coiled material 6, an upper waterproof coiled material 7 and glass fiber cloth 8 are paved in sequence. The waterproof coating 4 is a polyurethane waterproof coating 4 with the thickness of 2mm, the bottom waterproof coiled material 5 is an ethylene propylene diene monomer waterproof coiled material with the thickness of 1.5mm, the lower waterproof coiled material 6 is an ethylene propylene diene monomer waterproof coiled material with the thickness of 1.5mm, and the upper waterproof coiled material 7 is an ethylene propylene diene monomer root-puncture-resistant waterproof coiled material with the thickness of 1.5 mm. The bottom plate 9 is laid to a thickness of 200mm at a position at the top plate 3 of the basement, and the bottom plate 9 is laid to a thickness of 350mm at a position at the top plate 3 of the non-basement.

Step 2, paving a reinforced concrete structural slab 10 with the thickness of 60 mm; one side of the reinforced concrete structural plate 10 close to the waterscape pool 2 is bulged to form a water storage groove structure.

Step 3, paving a waterproof mortar layer 11, wherein the thinnest part is 20 mm; one side of the waterproof mortar layer 11 close to the waterscape pool 2 is convex, and the height of the convex is smaller than that of the reinforced concrete structural slab 10. After the waterproof mortar layer 11 is laid, a supporting angle steel 18 is installed on one side of the reinforced concrete structural slab 10, the supporting angle steel 18 is arranged on the top of the waterproof mortar layer 11, and the supporting angle steel 18 is used for placing the grating trench cover plate 12.

And 4, arranging a grid ditch cover plate 12 at the top of the water storage groove. The grid trench cover 12 is made of 316 stainless steel.

And 5, paving a cobble layer 13 to form the connecting belt 1, and arranging an illuminating lamp 44 on the cobbles.

The mirror effect presented by the characteristic waterscape of the newly developed bank headquarters building is mapped to the peripheral beautiful scenery, on one hand, the collected and purified rainwater is used as a water replenishing source, so that the method is economic and environment-friendly, and perfectly embodies the value concept of green ecology and sustainable development of the newly developed bank; on the other hand, the construction scheme is reasonable in arrangement, so that the construction period can be shortened, and the presentation effect can be guaranteed.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention can be made without departing from the spirit and scope of the present invention, and these modifications and improvements are within the spirit and scope of the present invention.

Claims

1. A building rainwater circulation purification device is characterized by comprising a rainwater collection device, a rainwater purification device and a rainwater utilization device, wherein the rainwater collection device and the rainwater purification device are arranged underground,

2. The building rainwater recycling and purifying device as claimed in claim 1, wherein the rainwater collecting tank is a concrete tank body, the water inlet of the rainwater collecting tank is arranged at the upper part of the rainwater collecting tank, the bottom of the rainwater collecting tank is provided with a sludge pump, and the top of the rainwater collecting tank is provided with an overflow port.

3. The building rainwater circulation purification device according to claim 1, wherein a rainwater recycling pressure pump and a coagulation dosing device are arranged between the rainwater collection tank and the sand filtration tank.

4. The building rainwater circulation purification device according to claim 1, wherein a turbidity online monitoring device and a residual chlorine online monitoring device are arranged at a clear water end of the rainwater purification device.

5. The building rainwater circulation purification device according to claim 1, wherein the clean water tank comprises a first clean water tank and a second clean water tank, the first clean water tank is connected with a reclaimed water pipeline, the second clean water tank is connected with a waterscape pool, the first clean water tank is connected with a tap water replenishing pipeline, and the first clean water tank and the second clean water tank are communicated through a pipeline with a valve.

6. The rainwater recycling and purifying device for buildings as claimed in claim 5, wherein said first clear water tank is connected with the back flush end of said ultra-filtration filter through a back flush pump, and the concentrate end of said ultra-filtration filter is connected with said rainwater collecting tank.

7. The building rainwater recycling and purifying device as claimed in claim 6, wherein the clear water end of the ultrafiltration filter is connected with the chemical washing water tank through a valve, the chemical washing water tank is connected with the chemical washing filter, the chemical washing filter is connected with the ultrafiltration filter, and the chemical washing water tank is provided with a tap water replenishing opening.

8. The building rainwater circulation purification device of claim 1, wherein the waterscape pond is arranged around the building, a connecting belt is arranged between the waterscape pond and the building, the connecting belt is a water permeable structure, a water storage groove is arranged below the connecting belt, a flow guide pipe is arranged in the water storage groove, and the flow guide pipe is connected to the rainwater collecting pipe.

9. The rainwater recycling and purifying apparatus for building as claimed in claim 8, wherein the surface of said connecting belt is lower than the level of the road surface and higher than the level of the surface of said waterscape pool.