An integrated system for rainwater harvesting and greywater reuse in buildings

Abstract

This utility model belongs to the field of urban water conservation and discloses an integrated system for rainwater harvesting and greywater reuse in buildings. It includes a rainwater harvesting system comprising a rainwater tank, rainwater collection pipes, rainwater downpipes, and a rainwater outlet pipe. The rainwater tank is installed within the building body, the rainwater collection pipes are fixed to the top of the building body and connected to the rainwater tank, and a rainwater overflow pipe is installed inside the rainwater tank. The rainwater downpipes are installed on the side walls of the building body, and the rainwater overflow pipes are connected to the rainwater downpipes. The rainwater outlet pipe is installed on the side wall of the rainwater tank. A greywater system is also included. Rainwater is collected from the top floor of the building body through the rainwater collection pipes, and then connected to the greywater system through the rainwater outlet pipes. This allows the rainwater collected by the building body to be reused for indoor washing, avoiding the situation where rainwater collected by the building cannot be fully utilized by the rain garden, thus improving the utilization rate of rainwater.

Description

Technical Field

[0001] This utility model belongs to the field of urban water-saving technology, specifically relating to an integrated system for rainwater collection and greywater reuse in buildings. Background Technology

[0002] Due to the scarcity of freshwater resources, people are paying more and more attention to the development and utilization of water resources. In response to the call for water conservation, many buildings are required to be equipped with greywater systems. These systems treat low-pollution domestic water for reuse by people in the buildings, thereby improving the utilization rate of water resources.

[0003] In nature, rainwater is also a collectable and usable water resource. As a result, the concept of sponge cities has been vigorously developed. In the existing rainwater harvesting structure of sponge cities, part of the rainwater is collected on the roof of buildings and supplied to rain gardens on the ground through rainwater downpipes. However, on rainy days, rain gardens do not need to collect rainwater from the roof of buildings, resulting in most of the rainwater supplied by buildings not being absorbed and utilized by rain gardens, but being discharged into the rainwater pipe network through the overflow outlets of rainwater downpipes.

[0004] Because the rainwater collected by buildings on rainy days cannot be fully utilized, the existing sponge city building structures have a low rainwater utilization rate and still have considerable room for improvement. Utility Model Content

[0005] The present invention aims to provide an integrated system for rainwater harvesting and greywater reuse in buildings, in order to solve the problem of low rainwater utilization rate in existing sponge city building structures mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an integrated system for rainwater harvesting and greywater reuse in buildings, installed within the building body, including...

[0007] The rainwater harvesting system includes a rainwater tank, rainwater collection pipes, rainwater downpipes, and rainwater outlet pipes. The rainwater tank is installed inside the building body, the rainwater collection pipes are fixed to the top of the building body and connected to the rainwater tank, a rainwater overflow pipe is installed inside the rainwater tank, the rainwater downpipes are installed vertically to the building body, the rainwater overflow pipes are connected to the rainwater downpipes, and the rainwater outlet pipes are installed on the side wall of the rainwater tank.

[0008] The greywater system is located within the building body and below the floor where the rainwater pool is located. The greywater system includes a clean water tank, and the rainwater outlet pipe is connected to the clean water tank.

[0009] The principle and effects of this technical solution:

[0010] 1. Rainwater is collected from the top floor of the building through rainwater collection pipes, and then connected to the greywater system through rainwater outlet pipes. This allows the rainwater collected by the building to be recycled for indoor washing, thus avoiding the situation where the rainwater collected by the building cannot be fully utilized by the rain garden on rainy days and improving the utilization rate of rainwater.

[0011] 2. By installing rainwater downpipes and rainwater overflow pipes, when the rainfall is heavy or the greywater system is saturated, excess water in the rainwater tank can still be discharged into sponge systems such as rain gardens through the rainwater downpipes, thus achieving a tiered utilization effect of rainwater.

[0012] 3. Since rainwater can be treated and supplied to the clean water tank, ensuring a sufficient water source for reuse, the greywater system can use wastewater from handwashing, showering, etc., which have low treatment costs, to reduce the operating and treatment costs of the greywater system.

[0013] The present invention is further configured as follows: the greywater system includes a greywater tank and a greywater treatment mechanism; the building body has a high-zone wastewater pipe and a high-zone washpipe; the bottom of the high-zone wastewater pipe is connected to the greywater tank; the building body is equipped with a clean water pipe and a greywater wastewater pipe; a greywater overflow pipe is installed in the greywater tank; the greywater overflow pipe is connected to the greywater wastewater pipe; the greywater tank is connected to the greywater treatment mechanism through a first conveying pipe; the greywater treatment mechanism is connected to the clean water tank through a second conveying pipe; the clean water tank has a pressurization unit and a clean water overflow pipe; the clean water overflow pipe is connected to the clean water pipe; and the pressurization unit is connected to the high-zone washpipe.

[0014] The principle and effect of this technical solution are as follows: By connecting the high-zone wastewater pipe to the greywater tank, the washroom wastewater in the high-zone can be collected by the greywater tank. The wastewater in the greywater tank is then transported to the greywater treatment unit for purification through the first conveying pipe. After purification, it is transported to the clean water tank through the second conveying pipe. At the same time, the clean water tank also collects rainwater collected in the rainwater tank. Then, through the pressurization unit, the collected greywater and rainwater are transported back to the upper floors of the building through the high-zone washroom pipe for secondary use, thereby improving the utilization rate of water resources. The setting of clean water pipe and greywater wastewater pipe can discharge excess water when the wastewater volume is large, so as to ensure the normal operation of the greywater system.

[0015] The present invention is further configured such that: the installation height of the greywater tank is not lower than the installation height of the greywater treatment mechanism, and the installation height of the greywater treatment mechanism is not lower than the installation height of the clear water tank.

[0016] The principle and effect of this technical solution: By limiting the installation height of the greywater tank, greywater treatment mechanism, and clear water tank, the greywater system can be installed on different floors even when the equipment room is small. The greywater tank can transport the return water to the greywater treatment mechanism by gravity, and the greywater treatment mechanism can transport water to the clear water tank in the same way. Thus, the greywater treatment mechanism does not need to pump water from the clear water tank (or requires less pumping power), and similarly, the clear water tank does not need to pump water from the greywater treatment mechanism, saving costs.

[0017] The present invention is further configured such that a filtration and disinfection mechanism is also provided inside the building body, and the filtration and disinfection mechanism is connected in series with the rainwater outlet pipe.

[0018] The principle and effect of this technical solution: The rainwater delivered from the rainwater tank is filtered and disinfected by the filtration and disinfection mechanism, which makes the rainwater cleaner and meets the standard for use as recycled water. This will not damage the clean water tank. Furthermore, by limiting the position of the filtration and disinfection mechanism, the inertia of the rainwater flowing down can accelerate the filtration and save energy.

[0019] The present invention is further configured such that: the medium water tank has a medium water sedimentation area, and a medium water slag discharge pipe connected to the medium water sedimentation area is installed at the bottom of the medium water tank, and the medium water slag discharge pipe is connected to the medium water wastewater pipe.

[0020] The principle and effect of this technical solution: By setting up a sedimentation zone for greywater, some impurities in the greywater tank can be accumulated at the bottom of the greywater tank through sedimentation, and discharged into the greywater wastewater pipe through the greywater sludge discharge pipe. This prevents these impurities from being processed and purified by the greywater treatment unit, thus reducing the amount of impurities that the greywater treatment unit needs to handle.

[0021] The present invention is further configured such that: the rainwater pool has a rainwater sedimentation area, and a rainwater discharge pipe connected to the rainwater sedimentation area is installed at the bottom of the rainwater pool, and the rainwater discharge pipe is connected to the rainwater riser.

[0022] The principle and effect of this technical solution: By setting up a rainwater sedimentation zone, impurities mixed in with rainwater can be settled and then discharged into the rainwater downpipe through the rainwater sludge discharge pipe. This eliminates the need for further treatment of these impurities, as they are removed through sedimentation, thus reducing the pressure on subsequent filtration.

[0023] The present invention is further configured such that: a top overflow pipe is installed on the top of the building body, the top overflow pipe is connected to the rainwater downpipe, and the top edge of the top overflow pipe is higher than the top edge of the rainwater collection pipe.

[0024] The principle and effect of this technical solution: By setting up an overflow pipe on the top floor, when the amount of rainwater is large and the rainwater collection pipe cannot collect the rainwater in time, the rainwater accumulated on the top floor of the building can still be discharged through the overflow pipe, thereby avoiding the accumulation of a large amount of rainwater on the top floor of the building, which could lead to the top floor of the building being soaked. Attached Figure Description

[0025] Figure 1 This is the front view of the present invention;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0027] Figure 3 for Figure 1 Enlarged view of point B in the image. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0029] The reference numerals in the accompanying drawings include:

[0030] 110. Building structure; 120. High-rise wastewater pipe; 130. High-rise washroom pipe; 140. Fresh water pipe; 150. Reclaimed water / wastewater pipe;

[0031] 210. Rainwater tank; 220. Rainwater collection pipe; 230. Rainwater downpipe; 240. Rainwater outlet pipe; 250. Rainwater overflow pipe; 260. Filtration and disinfection mechanism; 270. Rainwater sludge discharge pipe; 280. Top floor overflow pipe;

[0032] 310. Greywater tank; 320. Greywater treatment unit; 330. Clear water tank; 340. Greywater overflow pipe; 350. First conveying pipe; 360. Second conveying pipe; 370. Pressurization unit; 380. Clear water overflow pipe; 390. Greywater slag discharge pipe.

[0033] Example:

[0034] As attached Figure 1-3 As shown, this utility model discloses an integrated system for rainwater harvesting and greywater reuse in buildings, installed within the building body 110. In this solution, as shown in the attached diagram... Figure 1 As shown, the building body 110 can be divided into low-rise and high-rise buildings, including a rainwater harvesting system and a greywater system.

[0035] The rainwater harvesting system includes a rainwater tank 210, a rainwater collection pipe 220, a rainwater downpipe 230, and a rainwater outlet pipe 240. The rainwater tank 210 is installed inside the building body 110, preferably below the accessible roof of the building body 110. The rainwater collection pipe 220 is fixed to the ground of the accessible roof of the building body 110 and is connected to the rainwater tank 210. Rainwater is collected and gathered from the accessible roof of the building body 110, and then transported to the rainwater outlet pipe 240. The rainwater tank 210 contains a rainwater overflow pipe 250 and a rainwater downpipe 230 installed on the side wall of the building body 110. The bottom end of the rainwater downpipe 230 can correspond to the rain garden. The rainwater overflow pipe 250 is connected to the rainwater downpipe 230. A rainwater outlet pipe 240 is installed on the side wall of the rainwater tank 210. The rainwater overflow pipe 250 is used to control the amount of rainwater stored in the rainwater tank 210 to prevent rainwater from overflowing from the rainwater tank 210. The rainwater tank 210 should be a closed box structure. The rainwater tank 210 has a rainwater sedimentation area. A rainwater sludge discharge pipe 270 connected to the rainwater sedimentation area is installed at the bottom of the rainwater tank 210 and is connected to the rainwater downpipe 230.

[0036] A top overflow pipe 280 is also installed on the top of the building body 110. The top overflow pipe 280 is connected to the rainwater downpipe 230, and the top edge of the top overflow pipe 280 is higher than the top edge of the rainwater collection pipe 220. The overflow outlet of the top overflow pipe 280 is 5cm higher than the accessible roof surface of the top floor of the building body 110.

[0037] The greywater system includes a greywater tank 310, a greywater treatment unit 320, and a clean water tank 330, all located within the building body 110 and below the rainwater tank 210. The building body 110 contains a high-zone wastewater pipe 120 and a high-zone washbasin pipe 130. The bottom of the high-zone wastewater pipe 120 is connected to the greywater tank 310. Clean water pipes 140 and greywater / wastewater pipes 150 are installed on the side walls of the building body 110. A greywater overflow pipe 340 is installed within the greywater tank 310 and is connected to the greywater / wastewater pipe 150. The greywater tank 310 is connected to the greywater treatment unit 320 via the first delivery pipe 350. The greywater treatment unit 320 is connected to the clean water tank 330 via the second delivery pipe 360. The clean water tank 330 has a pressurization unit 370 and a clean water overflow pipe 380. The clean water overflow pipe 380 is connected to the clean water pipe 140. The pressurization unit 370 is connected to the high-zone wash pipe 130. The installation height of the greywater tank 310 is not lower than the installation height of the greywater treatment unit 320. The installation height of the greywater treatment unit 320 is not lower than the installation height of the clean water tank 330.

[0038] The greywater tank 310, greywater treatment unit 320, and clear water tank 330 are usually installed as a set. These are existing commercially available products. The model and power are selected based on the required floor height, number of rooms, etc. In cases where the storage room is small, the following can be used as an example. Figure 1 and attached Figure 3 As shown, the greywater tank 310, greywater treatment unit 320 and clean water tank 330 are set on different floors to reduce the space occupied by the equipment room on the same floor.

[0039] Meanwhile, the clean water tank 330 of the greywater system is also connected to the low-rise wash pipe of the low-rise building body 110 via a water pipe (not shown in the figure). Through the action of water pressure, it can spontaneously deliver water to the toilet in the building body 110 located below the clean water tank 330, without the need for pressurization by the pressurization unit 370. This method is the conventional operation method of the greywater system and is not within the scope of protection of this solution. It is only briefly described here to explain the working principle. The parts not mentioned do not mean that the greywater system does not have the corresponding capabilities.

[0040] The building body 110 is also equipped with a filtration and disinfection mechanism 260. The filtration and disinfection mechanism 260 mainly consists of a filter and a disinfection device. The input end of the filter is connected to the rainwater outlet pipe 240, the output end of the filter is connected to the input end of the disinfection device, and the output end of the disinfection device is connected to the clean water tank 330. By setting the filtration and disinfection mechanism 260 below the rainwater pool 210, the water pressure can automatically flush and filter the rainwater as it is transported downwards, thereby improving the filtration effect and speed.

[0041] The greywater tank 310 has a greywater sedimentation area. A greywater sludge discharge pipe 390 connected to the greywater sedimentation area is installed at the bottom of the greywater tank 310. The greywater sludge discharge pipe 390 is connected to the greywater wastewater pipe 150. (A corresponding sludge discharge pipe is also installed below the clear water tank 330. This sludge discharge pipe is connected to the clear water pipe 140 and is used to discharge impurities in the clear water tank 330).

[0042] In this solution, the filtration and disinfection unit 260 and the greywater system are both commercially available products; selection can be made based on actual usage. The specific implementation process is as follows:

[0043] The parts of the device not covered herein are the same as or can be implemented using existing technologies.

[0044] Among them, insert and sliding insert are mating bodies with holes, the cross section of the shaft or rod matches the hole, and the shaft or rod can slide relative to the hole. Threaded insert is a hole with threads, the shaft or rod is threaded, and the shaft or rod is connected to the mating body by screwing. Detachable installation can be by bolt thread connection or bolt and nut connection, etc., depending on what can be actually achieved.

[0045] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An integrated system for rainwater harvesting and greywater reuse in buildings, installed within the building body, characterized in that: include A rainwater harvesting system includes a rainwater tank, a rainwater collection pipe, a rainwater downpipe, and a rainwater outlet pipe. The rainwater tank is installed inside the building body. The rainwater collection pipe is fixed to the top of the building body and is connected to the rainwater tank. A rainwater overflow pipe is installed inside the rainwater tank. The rainwater downpipe is vertically installed on the building body and is connected to the rainwater overflow pipe. The rainwater outlet pipe is installed on the side wall of the rainwater tank. A greywater system is installed within the building body and below the floor where the rainwater pool is located. The greywater system includes a clean water tank, and the rainwater outlet pipe is connected to the clean water tank.

2. The integrated system for rainwater harvesting and greywater reuse in buildings as described in claim 1, characterized in that: The greywater system includes a greywater tank and a greywater treatment unit. The building body has a high-zone wastewater pipe and a high-zone washbasin pipe. The bottom of the high-zone wastewater pipe is connected to the greywater tank. The building body is equipped with a clean water pipe and a greywater wastewater pipe. A greywater overflow pipe is installed in the greywater tank and is connected to the greywater wastewater pipe. The greywater tank is connected to the greywater treatment unit through a first conveying pipe. The greywater treatment unit is connected to the clean water tank through a second conveying pipe. The clean water tank has a pressurization unit and a clean water overflow pipe. The clean water overflow pipe is connected to the clean water pipe. The pressurization unit is connected to the high-zone washbasin pipe.

3. The integrated system for rainwater harvesting and greywater reuse in buildings as described in claim 2, characterized in that: The installation height of the greywater tank shall not be lower than the installation height of the greywater treatment mechanism, and the installation height of the greywater treatment mechanism shall not be lower than the installation height of the clear water tank.

4. The integrated system for rainwater harvesting and greywater reuse in buildings as described in claim 2, characterized in that: The building body is also equipped with a filtration and disinfection mechanism, which is connected in series with the rainwater outlet pipe.

5. An integrated system for rainwater harvesting and greywater reuse in buildings as described in claim 2, characterized in that: The greywater tank has a greywater sedimentation zone, and a greywater sludge discharge pipe connected to the greywater sedimentation zone is installed at the bottom of the greywater tank. The greywater sludge discharge pipe is connected to the greywater wastewater pipe.

6. The integrated system for rainwater harvesting and greywater reuse in buildings as described in claim 1, characterized in that: The rainwater pool has a rainwater sedimentation area, and a rainwater discharge pipe connected to the rainwater sedimentation area is installed at the bottom of the rainwater pool. The rainwater discharge pipe is connected to the rainwater riser.

7. An integrated system for rainwater harvesting and greywater reuse in buildings as described in claim 1, characterized in that: The top of the building body is also equipped with a top overflow pipe, which is connected to the rainwater downpipe, and the top edge of the top overflow pipe is higher than the top edge of the rainwater collection pipe.

Images