Rainwater recycling system of green building

Abstract

The invention discloses a rainwater recycling system of a green building, which comprises a water storage system arranged on a building roof and used for collecting rainwater; the biochemical filtering system is arranged around the water storage system and is used for filtering the rainwater; the planting layer covers the top surface of the biological filtration system and is used for planting vegetation; the spraying system is used for spraying the rainwater collected by the water storage system to the planting layer; according to the rainwater recycling system, rainwater recycling of the building roof and the green roof are fully combined, rainwater recycling is achieved, and the technical requirements of the green roof are met.

Description

Technical Field

[0001] The invention relates to the technical field of rainwater recycling, and in particular to a rainwater recycling system for a green building. Background Art

[0002] Rainwater recycling refers to the collection and utilization of rainfall runoff collected from hardened surfaces such as building roofs, roads, and squares, and the accumulation of rainwater through collection, water transmission, water purification, and storage channels to provide rainwater replenishment for greening, landscape water bodies, washing, and side water use, so as to achieve the purpose of comprehensive utilization of rainwater resources and water conservation. It has broad significance in alleviating urban rainwater floods, controlling rainwater runoff pollution, and improving the urban ecological environment.

[0003] Rainwater from building roofs is relatively clean, with few impurities, silt and other pollutants. It can be discharged directly into the water storage system after discharge and simple filtration, and then treated for use. Green roofs are a method of controlling urban non-point source pollution. Green roof technology can effectively reduce rainwater runoff, reduce the burden on urban drainage systems, and control urban non-point source pollution to a certain extent through the setting of elements such as plants and substrate layers. In addition, green roofs can also alleviate the urban heat island effect and increase the green view rate of urban space, with significant ecological and social benefits.

[0004] At present, how to fully combine rainwater recovery on building roofs with green roofs is a new research direction for green buildings. Summary of the invention

[0005] The purpose of the present invention is to provide a rainwater recycling system for green buildings, which can fully combine rainwater recycling on building roofs with green roofs, thereby realizing rainwater recycling and meeting the technical requirements of green roofs.

[0006] The technical solution of the present invention is as follows: A rainwater recycling system for a green building, comprising: A water storage system, installed on the roof of the building, is used to collect rainwater; A biochemical filtration system, arranged around the water storage system, for filtering rainwater; A planting layer, covering the top surface of the biofiltration system, for planting vegetation; The sprinkler system is used to spray the rainwater collected by the water storage system onto the planting layer.

[0007] As a preferred embodiment of the present invention, the water storage system includes a water reservoir and a plurality of drainage pipes, the water reservoir is arranged at the center of the roof of the building, the plurality of drainage pipes are evenly and circumferentially arranged on the side walls of the water reservoir, one end of the drainage pipe is connected to the water reservoir, and the other end extends away from the water reservoir, and the drainage pipe is a perforated pipe.

[0008] As a preferred embodiment of the present invention, the water storage system also includes a water replenishment system, which includes a water replenishment controller, a water replenishment pipe and an electric valve arranged on the water replenishment pipe, the electric valve is electrically connected to the water replenishment controller for communication, one end of the water replenishment pipe is connected to the tap water pipeline, and the other end extends into the interior of the water reservoir, a water level detection device is arranged on the side wall of the water reservoir, the water level detection device is used to detect the water level height inside the water reservoir and send the water level height signal to the water replenishment controller, and the water replenishment controller controls the operation of the electric valve according to the water level height signal.

[0009] As a preferred embodiment of the present invention, an overflow port is arranged on the side wall of the water storage tank, and the overflow port is connected to the municipal rainwater pipeline through a pipe.

[0010] As a preferred embodiment of the present invention, the biochemical filtration system includes a pebble layer, a lower filter layer, a mixed filter material layer, an upper filter layer and a sand filter layer arranged in sequence from bottom to top, and the drainage pipe is located inside the pebble layer; the mixed filter material layer is composed of biochemical particles, and the biochemical particles are obtained by mixing and granulating activated carbon powder, zeolite powder, bamboo crushed material, microorganisms and chemical additives.

[0011] As a preferred embodiment of the present invention, the mass ratio of the activated carbon powder, zeolite powder, bamboo crushed material, microorganisms and chemical additives is 21:10:17:11:7.

[0012] As a preferred embodiment of the present invention, the microorganisms include nitrifying bacteria, denitrifying bacteria and phosphorus removal bacteria.

[0013] As a preferred embodiment of the present invention, the chemical auxiliary agent is a composition of hexadecyltrimethylammonium bromide, hydrated manganese oxide, hydrated iron oxide, disodium hydrogen phosphate and metal phosphate, and the mass ratio thereof is 5:3:5:11:5.

[0014] As a preferred embodiment of the present invention, the planting layer comprises a polyester fiber non-woven fabric layer and a planting soil layer arranged in sequence from bottom to top, and the height of vegetation planted in the planting soil layer is less than 30 cm.

[0015] As a preferred embodiment of the present invention, the spray system includes a water pump, a spray pipe and a plurality of spray heads, the spray pipe is connected to the water pump, the plurality of spray heads are arranged on the spray pipe at intervals, and the water pump is used to pump rainwater collected by the water storage system into the spray pipe and spray it toward the planting layer through the spray heads.

[0016] The present invention is beneficial in that: Greening and pools are set up on the roofs of buildings to achieve green roofs to control urban non-point source pollution; When it rains, part of the rainwater from the building roof falls directly into the reservoir, while the other part falls on the planting layer and penetrates downward. The infiltrated rainwater is filtered by the biochemical filtration system, and the rainwater inside the pebble layer flows to the reservoir through the drainage pipe. The biochemical filtration system effectively removes small particles of solid suspended matter, trace metal ions, acidic substances, organic matter and other pollutants in the rainwater, so that the rainwater is purified. On sunny days after rain, the rainwater in the reservoir is used to irrigate the vegetation, thus realizing the recycling of rainwater. The present invention realizes the full combination of rainwater recovery on the building roof and the green roof, that is, realizes the recycling of rainwater and meets the technical requirements of the green roof. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the present invention being arranged on a roof of a building; Figure 2 It is a cross-sectional schematic diagram of the present invention arranged on a building roof; Figure 3 yes Figure 2 A local enlarged schematic diagram of the .

[0018] Meaning of the reference numerals in the figures: 1- water storage tank, 2- drainage pipe, 3- water supply pipe, 4- overflow port; 5-vegetation, 6-planting soil layer, 7-water pump, 8-sprinkler pipe, 9-protection layer, 10-strengthening structure layer; 11-pebble layer, 12-lower filter layer, 13-mixed filter material layer, 14-upper filter layer, 15-sand filter layer. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1-3 As shown, this embodiment is a rainwater recycling system for green buildings, including the following parts: The water storage system is installed on the roof of the building to collect rainwater. The protective layer 9 of the roof of the building is constructed normally, including a waterproof layer and an anti-root layer. Then, on the basis of the protective layer 9, a reinforced structural layer 10 of a certain thickness is added depending on the situation. The reinforced structural layer 10 includes a reinforced waterproof layer and an asphalt cushion layer.

[0021] The water storage system includes a water storage tank 1 and a plurality of drainage pipes 2, the number of which is determined by the site conditions; the water storage tank 1 is arranged at the center of the roof of the building, and the plurality of drainage pipes 2 are evenly and circumferentially arranged on the side wall of the water storage tank 1, one end of the drainage pipe 2 is connected to the water storage tank 1, and the other end extends away from the water storage tank 1, and the drainage pipe 2 adopts a perforated pipe to drain rainwater.

[0022] The water storage system of this embodiment also includes a water replenishment system, which includes a water replenishment controller, a water replenishment pipe 3 and an electric valve arranged on the water replenishment pipe 3, the electric valve is electrically connected to the water replenishment controller for communication, one end of the water replenishment pipe 3 is connected to the tap water pipeline, and the other end extends into the interior of the water reservoir 1, and a water level detection device is arranged on the side wall of the water reservoir 1, the water level detection device is used to detect the water level height inside the water reservoir 1 and send the water level height signal to the water replenishment controller, and the water replenishment controller controls the operation of the electric valve according to the water level height signal; when the water level height inside the water reservoir 1 is low, water is replenished to the inside of the water reservoir 1 in time through the water replenishment system to prevent the water reservoir 1 from drying up.

[0023] In this embodiment, an overflow port 4 is arranged on the side wall of the water storage tank 1, and the overflow port 4 is connected to the municipal rainwater pipeline through a pipe to prevent extremely special circumstances from occurring.

[0024] A biochemical filtration system is installed around the water storage system to filter rainwater; The biochemical filtration system includes a pebble layer 11, a lower filter layer 12, a mixed filter material layer 13, an upper filter layer 14 and a sand filter layer 15 which are arranged in sequence from bottom to top. The drainage pipe 2 of the water storage system is located inside the pebble layer 11; the lower filter layer 12 and the upper filter layer 14 adopt fiber bundle filter screens; the mixed filter material layer 13 is composed of biochemical particles, and the biochemical particles are prepared by mixed granulation of activated carbon powder, zeolite powder, bamboo crushed material, microorganisms and chemical additives; wherein the mass ratio of activated carbon powder, zeolite powder, bamboo crushed material, microorganisms and chemical additives is 21:10:17:11:7.

[0025] The microbial bacteria include nitrifying bacteria, denitrifying bacteria and phosphorus removal bacteria; the chemical additive is a composition of hexadecyltrimethylammonium bromide, hydrated manganese oxide, hydrated iron oxide, disodium hydrogen phosphate and metal phosphate, and the mass ratio thereof is 5:3:5:11:5.

[0026] Activated carbon powder and zeolite powder are used as chemical adsorption materials; bamboo crushed material contains a large amount of cellulose, which is separated under the action of chemical additives, so that it has a good adsorption effect on organic matter and heavy metals in rainwater; the mixed filter material layer 13 of this embodiment includes both microbial components (microorganisms) and chemical additives. Microorganisms will form biofilms on the surface of the particles, and chemical additives can modify the microorganisms, allowing the microorganisms to reproduce rapidly, thereby improving their removal of organic matter and heavy metal components in rainwater.

[0027] The adsorption performance of hexadecyltrimethylammonium bromide in chemical additives is relatively strong (with the cooperation of activated carbon adsorbent); disodium hydrogen phosphate in chemical additives can effectively neutralize acidic substances in rainwater and stabilize the pH value of rainwater; hydrated manganese oxide, hydrated iron oxide and metal phosphates have high specific surface area and strong nano-surface effect, and have outstanding performance in efficient adsorption and separation of pollutants in rainwater; and metal phosphates, as corrosion inhibitors, can significantly reduce the corrosion damage of rainwater to equipment and pipelines; at the same time, metal phosphates can also be used as dispersants, which helps to make suspended particles (such as iron and manganese) exist in a dispersed form in water, prevent them from depositing during filtration and sedimentation, and help to remove these particles, thereby improving the purity of rainwater after filtration.

[0028] A planting layer, covering the top surface of the biofiltration system, for planting vegetation 5; The planting layer includes a polyester fiber non-woven fabric layer and a planting soil layer 6 which are arranged in sequence from bottom to top. The vegetation 5 planted in the planting soil layer 6 is less than 30 cm in height and is mainly lawns, dwarf herbaceous plants and flowers.

[0029] A spraying system, used for spraying the rainwater collected by the water storage system onto the planting layer; The sprinkler system includes a water pump 7, a sprinkler pipe 8 and a plurality of sprinkler heads. The sprinkler pipe 8 is connected to the water pump 7. The plurality of sprinkler heads are arranged at intervals on the sprinkler pipe 8. In this embodiment, the sprinkler pipe 8 is arranged on the top of the water reservoir 1 and surrounds the water reservoir 1. The water pump 7 is used to pump the rainwater collected by the water storage system into the sprinkler pipe 8 and spray it toward the planting layer through the sprinkler head, thereby achieving watering of the vegetation 5.

[0030] In this embodiment, greening and pools are arranged on the roof of the building, so that the green roof is used to control urban non-point source pollution; when it rains, part of the rainwater on the roof of the building falls directly into the reservoir, and the other part of the rainwater falls on the planting layer and penetrates downward, and the penetrated rainwater is filtered by the biochemical filtration system, and the rainwater located inside the pebble layer after filtration flows to the reservoir through the drainage pipe; the biochemical filtration system effectively removes pollutants such as small particles of solid suspended matter, trace metal ions, acidic substances and organic matter in the rainwater, so that the rainwater is purified; on sunny days after rain, the rainwater in the reservoir is used to irrigate vegetation, thereby realizing the recycling of rainwater; the present invention realizes the full combination of rainwater recovery on the roof of the building and the green roof, that is, the recycling of rainwater is realized, and the technical requirements of the green roof are met.

[0031] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that: unless otherwise clearly stipulated and limited, the terms "installation", "connection", "setting" and "formation" should be understood in a broad sense; for example: it can be a fixed connection, setting, or a detachable connection, setting, or an integrated structure; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements; for those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A rainwater recycling system for green buildings, characterized in that: include: A water storage system, installed on the roof of the building, is used to collect rainwater; A biochemical filtration system, arranged around the water storage system, for filtering rainwater; A planting layer, covering the top surface of the biofiltration system, for planting vegetation; The sprinkler system is used to spray the rainwater collected by the water storage system onto the planting layer.

2. A rainwater recycling system for green buildings according to claim 1, characterized in that: The water storage system includes a water reservoir and a plurality of drainage pipes. The water reservoir is arranged at the center of the roof of the building. The plurality of drainage pipes are evenly and circumferentially arranged on the side wall of the water reservoir. One end of the drainage pipe is connected to the water reservoir, and the other end extends away from the water reservoir. The drainage pipe is a perforated pipe.

3. A rainwater recycling system for green buildings according to claim 2, characterized in that: The water storage system also includes a water replenishment system, which includes a water replenishment controller, a water replenishment pipeline and an electric valve arranged on the water replenishment pipeline, the electric valve is electrically connected to the water replenishment controller for communication, one end of the water replenishment pipeline is connected to the tap water pipeline, and the other end extends into the interior of the water reservoir, a water level detection device is arranged on the side wall of the water reservoir, the water level detection device is used to detect the water level height inside the water reservoir and send the water level height signal to the water replenishment controller, and the water replenishment controller controls the operation of the electric valve according to the water level height signal.

4. A rainwater recycling system for green buildings according to claim 2 or 3, characterized in that: An overflow port is arranged on the side wall of the water storage tank, and the overflow port is connected with the municipal rainwater pipeline through a pipeline.

5. The rainwater recycling system for green buildings according to claim 1 is characterized in that: The biochemical filtration system comprises a pebble layer, a lower filter screen layer, a mixed filter material layer, an upper filter screen layer and a sand filter layer which are arranged in sequence from bottom to top, and the drainage pipe is located inside the pebble layer; the mixed filter material layer is composed of biochemical particles, and the biochemical particles are prepared by mixing and granulating activated carbon powder, zeolite powder, bamboo crushed material, microorganisms and chemical additives.

6. A rainwater recycling system for green buildings according to claim 5, characterized in that: The mass ratio of the activated carbon powder, zeolite powder, bamboo crushed material, microorganisms and chemical additives is 21:10:17:11:

7.

7. A rainwater recycling system for green buildings according to claim 5 or 6, characterized in that: The microorganisms include nitrifying bacteria, denitrifying bacteria and phosphorus removal bacteria.

8. A rainwater recycling system for green buildings according to claim 5 or 6, characterized in that: The chemical auxiliary agent is a composition of hexadecyltrimethylammonium bromide, hydrated manganese oxide, hydrated iron oxide, disodium hydrogen phosphate and metal phosphate, and the mass ratio thereof is 5:3:5:11:

5.

9. The rainwater recycling system for green buildings according to claim 1, characterized in that: The planting layer comprises a polyester fiber non-woven fabric layer and a planting soil layer which are arranged in sequence from bottom to top, and the height of vegetation planted in the planting soil layer is less than 30 cm.

10. The rainwater recycling system for green buildings according to claim 1, characterized in that: The spray system includes a water pump, a spray pipe and multiple spray heads. The spray pipe is connected to the water pump. The multiple spray heads are arranged on the spray pipe at intervals. The water pump is used to pump rainwater collected by the water storage system into the spray pipe and spray it toward the planting layer through the spray heads.

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