CN107746156B

CN107746156B - Constructed wetland purification method rainwater recycling system

Info

Publication number: CN107746156B
Application number: CN201711106304.6A
Authority: CN
Inventors: 张卫兵; 吴修勤; 侯月波; 杨文全; 翁晓斌
Original assignee: Road and Bridge International Co Ltd
Current assignee: Road and Bridge International Co Ltd
Priority date: 2017-11-10
Filing date: 2017-11-10
Publication date: 2020-10-02
Anticipated expiration: 2037-11-10
Also published as: CN107746156A

Abstract

The invention discloses a constructed wetland purification method rainwater recycling system, which comprises a rainwater collecting channel, a constructed wetland, a recycling pool, a filtering tank, a flow dividing pipe and a plurality of seepage pipes, wherein the filtering tank is arranged above the constructed wetland and close to the rainwater collecting channel, the plurality of seepage pipes are uniformly distributed at intervals in the vertical direction in the flow dividing pipe and the constructed wetland, the rainwater collecting channel is communicated with a pipe orifice at one end of a first water pipe, a pipe orifice at the other end of the first water pipe is communicated with one end of the filtering tank close to a fine aggregate layer, one end of the filtering tank close to an activated carbon layer is communicated with a pipe orifice at one end of the flow dividing pipe, pipe orifices at one end of the plurality of seepage pipes are communicated with the middle part of the flow dividing pipe, pipe orifices at the other end of the plurality of seepage pipes are inserted into a water containing space in the constructed wetland. The invention aims to provide a rainwater recycling system which has the advantages of good water treatment effect, stable effluent quality, strong nitrogen and phosphorus removal rate and strong adaptability to load change.

Description

Constructed wetland purification method rainwater recycling system

Technical Field

The invention belongs to the technical field of highway construction, and particularly relates to a rainwater recycling system adopting an artificial wetland purification method.

Background

The water resource waste in China is very serious, and the fact that the water resource is insufficient is not struggle. How to recycle water resources and reducing waste of water resources are the primary tasks. With the increasing increase of the contradiction between water resource supply and demand, more and more countries recognize the value of rainwater resources, and take a plurality of corresponding measures to comprehensively utilize rainwater according to local conditions. Energy-saving call is higher and higher, so that rainwater is recycled and is more and more emphasized by people. Traditional urban rainwater is collected and is fallen subaerial back at the rainwater, and partly infiltration replenishment groundwater through the ground, rainwater that can not infiltrate or come not too late to infiltrate gathers after collecting through ground gets into the inlet for stom water, and the rethread is collected the pipeline and is collected the back, discharges into the river course or promotes through the pump and gets into the river course. With the improvement of urbanization degree, the traditional rainwater management mode often causes main problems of urban flood, rainwater runoff pollution, large loss of rainwater resources, ecological environment destruction and the like. Therefore, at present, a rainwater recycling system with good rainwater treatment effect is urgently needed in the market.

Disclosure of Invention

Therefore, the invention aims to overcome the defect of poor rainwater treatment effect in the prior art.

Therefore, the invention provides a rainwater recycling system by an artificial wetland purification method, which comprises a rainwater collecting channel, an artificial wetland, a recycling pool, a filtering tank, a flow dividing pipe and a plurality of seepage pipes, wherein the filtering tank is arranged above the artificial wetland and close to the rainwater collecting channel, a fine stone layer, a fine sand layer and an activated carbon layer are sequentially arranged in the filtering tank, the flow dividing pipe is arranged between the filtering tank and the artificial wetland in the horizontal direction, the plurality of seepage pipes which are uniformly distributed at intervals are arranged in the vertical direction in the flow dividing pipe and the artificial wetland, the plurality of seepage holes which are uniformly distributed at intervals are radially arranged on the pipe wall of one end, close to the artificial wetland, of the seepage pipe, the rainwater collecting channel is communicated with a pipe orifice at one end of a first water pipe, and a pipe orifice at the other end of the first water pipe is communicated with one end, close to the fine stone layer, of the filtering tank, the filtration jar is close to the one end on activated carbon layer with the one end mouth of pipe intercommunication of shunt tubes, the other end mouth of pipe of shunt tubes seals, and is a plurality of the intermediate part intercommunication of the mouth of pipe of flow tube one end of seepage flow tube and shunt tubes is a plurality of the mouth of pipe of flow tube other end of seepage flow tube inserts in the water holding space in the constructed wetland, be provided with first outlet pipe on the constructed wetland, the one end mouth of pipe of first outlet pipe with the water holding space intercommunication of constructed wetland, the other end mouth of pipe of first outlet pipe with reuse water basin intercommunication, reuse water basin and outside water pipeline intercommunication.

In order to treat toxic substances in rainwater and improve the quality of rainwater recycling, the preferred technical scheme is that the rainwater recycling device further comprises a disinfection device, the disinfection device comprises a disinfection pool and a clean water pool, the first water outlet pipe is far away from one end pipe orifice of the rainwater collection channel and the disinfection pool, one end pipe orifice of the overflow pipe is communicated with the disinfection pool close to the top end, the other end pipe orifice of the overflow pipe is communicated with the clean water pool, one end pipe orifice of the second water pipe is communicated with the clean water pool, the other end pipe orifice of the second water pipe is communicated with the recycling pool, and a disinfection air pipe is arranged on the outer wall of the disinfection pool.

In order to reduce the treatment cost of the reuse water and abandon the rainwater containing more silt and pollutants, the preferable technical proposal is that the rainwater abandoning device is also included, the rainwater abandoning device comprises a rainwater abandoning well, a raindrop sensor, a valve and a first singlechip for controlling the opening and closing of the valve, the rainwater abandoning well is a hollow box body, a pipe orifice at one end of the first water pipe, which is far away from the rainwater collecting channel, is communicated with the rainwater abandoning well, a first groove body is arranged on the outer wall of the rainwater abandoning well, the raindrop sensor extending into the air is arranged on the outer wall of the first groove body, the first singlechip is arranged in the first groove body, the valve for opening and closing the water flow is arranged on the first water pipe, a pipe orifice at one end of a second water pipe is communicated with the rainwater abandoning well, the other end of the second water pipe is communicated with one end of the filter tank, which is close to the fine aggregate layer, the raindrop sensor is electrically connected with the first single chip microcomputer, and the first single chip microcomputer is electrically connected with the valve.

In order to protect the sensor and prevent large particles such as hailstones from damaging the sensor, the preferred technical scheme is that a filter screen wrapping the raindrop sensor is arranged on the raindrop sensor, and the bottom of the filter screen is fixedly connected with the outer wall of the abandoning well.

In order to fully reuse rainwater and reduce waste of water resources, the preferable technical scheme is that a flow sensor is arranged in the first water pipe and close to the rainwater collecting channel, and the flow sensor is electrically connected with the single chip microcomputer.

In order to guarantee the continuous supply of reuse water, the preferred technical scheme is that the automatic water supply device is further included, the automatic water supply device comprises a spare water tank, a liquid level meter, a microprocessor and a first water valve, the spare water tank is arranged at a position close to the reuse water tank, a second groove body is arranged on the outer wall of the spare water tank, the microprocessor is arranged in the second groove body, the spare water tank is communicated with the reuse water tank through a third water pipe, a first water valve used for opening and closing water flow is arranged on the third water pipe, the liquid level meter is arranged on the inner wall of the reuse water tank, the liquid level meter is electrically connected with the microprocessor, and the microprocessor is electrically connected with the first water valve.

In order to prevent the loss caused by the leakage of rainwater in the artificial wetland, the preferable technical scheme is that a waterproof layer is wrapped on the underground part of the artificial wetland, and a pipe orifice at one end of the first water pipe, which is close to the artificial wetland, is communicated with the waterproof layer.

In order to ensure the quality of the reuse water, the preferable technical scheme is that the reuse water monitoring device further comprises a reuse water monitoring device, wherein the reuse water monitoring device comprises a second water valve, a high-pressure pump, a water quality monitoring sensor, a second single chip microcomputer, a fourth water outlet pipe and a water return pipe, the second single chip microcomputer is used for receiving the water quality parameters detected by the water quality monitoring sensor, analyzing, comparing and controlling the second water valve to be opened, closed and controlling the high-pressure pump to be opened and closed, a third groove body is arranged on the outer wall of the reuse water tank, the second single chip microcomputer is arranged in the third groove body, a pipe orifice at one end of the fourth water outlet pipe is communicated with the reuse water tank, a pipe orifice at the other end of the fourth water outlet pipe is communicated with an external water using pipeline, the second water valve is arranged on the fourth water outlet pipe, the water quality monitoring sensor is arranged at the bottom of, the mouth of pipe of wet return one end with the high-pressure pump intercommunication, wet return other end mouth of pipe with filter the jar one end intercommunication that is close to the fine stone layer, the second singlechip respectively with the second water valve, the high-pressure pump, water quality monitoring sensor electric connection.

The invention has the advantages that: the invention relates to a rainwater recycling system by an artificial wetland purification method, which comprises a rainwater collecting channel, an artificial wetland, a recycling pool, a filtering tank, a flow dividing pipe and a plurality of seepage pipes, wherein the filtering tank is arranged above the artificial wetland and close to the rainwater collecting channel, a fine stone layer, a fine sand layer and an activated carbon layer are sequentially arranged in the filtering tank, the flow dividing pipe is arranged between the filtering tank and the artificial wetland in the horizontal direction, the plurality of seepage pipes which are uniformly distributed at intervals are arranged in the vertical direction in the flow dividing pipe and the artificial wetland, a plurality of seepage holes which are uniformly distributed at intervals are radially arranged on the pipe wall of one end of the seepage pipe close to the artificial wetland, the rainwater collecting channel is communicated with one end pipe opening of a first water pipe, the other end pipe opening of the first water pipe is communicated with one end of the filtering tank close to the fine stone layer, one end of the filtering tank close to the activated carbon layer, the water containing space that a plurality of seepage flow pipe one end mouths of pipe and shunt tubes communicate, and a plurality of seepage flow pipe other end mouths of pipe insert in the constructed wetland is provided with first outlet pipe on the constructed wetland, and the one end mouth of pipe of first outlet pipe and constructed wetland's water containing space intercommunication, the other end mouth of pipe and the reuse pond intercommunication of first outlet pipe, reuse pond and outside water pipeline intercommunication. In rainwater flowed into the filtration jar, the filtration on meticulous stone layer, fine sand bed, activated carbon layer was adsorbed in proper order, rainwater through preliminary filtration, through the shunt tubes, flow into in a plurality of infiltration pipes, even with the rainwater, during the slow water that flows into constructed wetland holds the space, owing to have a plurality of infiltration pipes, there are a plurality of infiltration holes on the infiltration pipe, during the rainwater can be even flows into constructed wetland, permeate constructed wetland, carry out abundant processing to the rainwater, rainwater treatment effect is good.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the structure of the sterilizing device of the present invention.

Fig. 3 is a schematic structural view of the rainwater discarding device of the present invention.

FIG. 4 is a schematic view of the automatic water replenishing device according to the present invention.

FIG. 5 is a schematic view of the structure of the reuse water monitoring device of the present invention

Wherein, 1-a rainwater collecting channel; 2-artificial wetland; 3-reusing the water pool; 4-a first water pipe; 5-a first water outlet pipe; 6-a disinfection tank; 7-an overflow pipe; 8-a clean water tank; 9-a second water pipe; 11-disinfection of the trachea; 12-a rainwater abandoning well; 13-a raindrop sensor; 14-a first singlechip; 15-filtering with a filter screen; 16-a valve; 17-a first groove body; 18-a second water outlet pipe; 19-a flow sensor; 20-a spare water tank; 21-a liquid level meter; 22-a microprocessor; 23-a first water valve; 24-a second groove body; 25-a third water pipe; 26-a waterproof layer; 27-highway; 28-a filtration tank; 29-a fine stone layer; 30-fine sand layer; 31-an activated carbon layer; 32-shunt tubes; 33-a seepage pipe; 34-a seepage hole; 35-a second water valve; 36-a high pressure pump; 37-a water quality monitoring sensor; 38-a second singlechip; 39-fourth outlet pipe; 40-a water return pipe; 41-third groove body.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-5, the constructed wetland purification method rainwater recycling system of the invention comprises a rainwater collecting channel 1, an constructed wetland 2, a recycling pool 3, a filter tank 28, a flow dividing pipe 32 and a plurality of seepage pipes 33, wherein the filter tank 28 is arranged above the constructed wetland 2 and close to the rainwater collecting channel 1, a fine stone layer 29, a fine sand layer 30 and an activated carbon layer 31 are sequentially arranged in the filter tank 28, the flow dividing pipe 32 is horizontally arranged between the filter tank 28 and the constructed wetland 2, the plurality of seepage pipes 33 uniformly distributed at intervals are vertically arranged in the flow dividing pipe 32 and the constructed wetland 2, a plurality of seepage holes 34 uniformly distributed at intervals are radially arranged on the pipe wall of one end of the seepage pipe 33 close to the constructed wetland, the rainwater collecting channel 1 is communicated with the pipe orifice at one end of a first water pipe 4, the pipe orifice at the other end of the first water pipe 4 is communicated with one end of the filter tank 28 close to the fine stone layer 29, the filter tank 28 is close to the one end on activated carbon layer 31 with the one end mouth of pipe intercommunication of shunt tubes 32, the other end mouth of pipe of shunt tubes 32 seals, and is a plurality of the intermediate part intercommunication of 33 one end mouths of pipe of seepage tubes and shunt tubes 32, it is a plurality of the pipe of 33 other ends mouths of seepage tubes inserts in the water holding space in the constructed wetland 2, be provided with first outlet pipe 5 on the constructed wetland 2, the one end mouth of pipe of first outlet pipe 5 with the water holding space intercommunication of constructed wetland 2, the other end mouth of pipe of first outlet pipe 5 with reuse water pond 3 intercommunication, reuse water pond 3 and outside water pipeline intercommunication.

The plants are important components of the artificial wetland. In the process of purifying sewage by the artificial wetland, the action of plants can be summarized into 3 important aspects, namely, nutrient substances in an available state in the sewage are recycled, and heavy metals and some toxic and harmful substances are adsorbed and enriched; ② oxygen is delivered to aerobic microorganisms in the root zone; enhancing and maintaining the hydraulic transmission of the medium.

Attention is paid to the principle of selecting wetland plants: the purifying capacity, the pollution resistance, the cold resistance and the heat resistance are strong, and corresponding plant species are adopted for different pollutants; selecting plants with good local adaptability, preferably local plants; thirdly, the root system is developed and the biomass is large; fourthly, the disease and insect resistance is strong; fifthly, the product has wide application or economic value; and sixthly, the management is easy, and the comprehensive utilization value is high.

Different plant types have a certain pertinence to different pollutants. Wetland plants with good nitrogen and phosphorus removal effect, such as cane shoots, reeds, candelilla and rush. The plants having a better removing effect on heavy metals are: the cattail leaves have good removal effect on heavy metals such as Pb, Zn, Cd and the like.

The plants in the artificial wetland can convey oxygen generated by photosynthesis to the root zone through the air passage, and an oxidation state microenvironment is formed in a reduction state medium of the root zone of the plants. The coexistence of the aerobic area and the anoxic area of the root zone provides suitable niches for aerobic, facultative and anaerobic microorganisms of the root zone, so that different microorganisms can play complementary roles. Due to the penetrating action of the plant roots and the root systems on the medium, a plurality of tiny air chambers or gaps are formed in the medium, the sealing property of the medium is reduced, and the looseness of the medium is enhanced, so that the hydraulic transmission of the medium is enhanced and maintained.

Factors affecting the treatment of plants are seasonal decline, such as direct injury, bruising, different compositions of water quality and substrate, water level, and eutrophication.

The microorganisms in the artificial wetland are the main force for purifying the sewage. The quantity of the sewage treatment agent can reflect the sewage purification capacity of the artificial wetland to a certain extent. They use organic matter as a rich energy source, converting it into nutrients and energy. The number of various microorganisms in the artificial wetland is basically the same as that in the natural wetland before the sewage is treated. However, as the sewage continuously enters the artificial wetland system, the number of certain microorganisms gradually increases and reaches a maximum value within a certain time to be stable.

The microorganisms in the artificial wetland system mainly remove organic matters and N in sewage, and certain organic substances and toxic substances which are difficult to degrade need to utilize the induced variation characteristics of the microorganisms to cultivate and domesticate dominant bacteria which are suitable for absorbing and digesting the organic substances and the toxic substances for degradation. The activity of microorganisms in the artificial wetland is the most main factor for purifying sewage by the wetland. Previous studies have found that microorganisms play an important role in the degradation of BOD5, COD, and nitrogen, among others.

The dominant bacteria in the artificial wetland include Pseudomonas, alcaligenes and Flavobacterium, which are fast growing microbes, contain degrading plasmid and are the main microbial population for decomposing organic matters. In addition, for some organic matters and toxic matters which are difficult to degrade, the characteristic of microorganism induced variation is applied to cultivate and domesticate dominant species which are suitable for absorbing and digesting the substances for degradation.

Meanwhile, researches find that the number and the types of microorganisms in the wetland have a certain relation with the sewage purification effect. The greater the number thereof, the higher the removal rate. The removal rate of BOD5 in the sewage is obviously related to the total number of wetland bacteria, the removal rate of ammonia nitrogen is closely related to the number of nitrobacteria and denitrifying bacteria, and the removal rate of total escherichia coli in the sewage is also obviously related to the number of wetland protozoa and actinomycetes. This also illustrates, in one aspect, that wetland microorganisms play an important role in the degradation of pollutants.

The substrate, also called as filler, is a bed body which is artificially designed and paved by gravels, sands, soil particles and the like with different sizes according to a certain thickness for plant growth and microorganism attachment. The substrate is a main place for sewage treatment, is also a main carrier of microorganisms, can provide a support carrier and nutrients required by growth for aquatic plants, and removes the nutrients such as SS, N, P and the like in the sewage through physical and chemical ways (such as adsorption, absorption, filtration, precipitation, complex reaction, ion exchange and the like) when the nutrients pass through the artificial wetland.

The free surface flow system mostly uses soil as a substrate, and the undercurrent and vertical flow systems select different substrates according to different characteristic pollutants, and need to consider factors such as low price, easy material obtaining and the like.

The animal is an indispensable part in the artificial wetland ecosystem, plays an important role in the ecological balance of a food chain and a nutrition level, and further makes an important contribution to the stability of the artificial wetland sewage treatment system. The earthworms (Drilonema) in the artificial wetland can play a role of cleaning garbage, thereby reducing the sludge discharge times. Earthworms and clamworms (Nereildiversiocolor) have an enriching effect on heavy metals, and it can be presumed that these animals also have some effect on the removal of heavy metals from sewage.

The working principle is as follows: the rainwater collecting channel 1 collects rainwater in nature, then flows into the filtering tank 28 through the first water pipe 4, sequentially passes through a fine stone layer, a fine sand layer and an activated carbon layer for filtering and adsorption, the rainwater flows into the plurality of permeation pipes 33 through the shunt pipe 32 after primary filtering, uniformly and slowly flows into the water containing space of the artificial wetland, and due to the plurality of permeation pipes, the permeation pipes are provided with a plurality of permeation holes, so that the rainwater can uniformly flow into the artificial wetland and permeate into the artificial wetland, the rainwater is fully treated, the rainwater treatment effect is good, and therefore the rainwater with better water quality can flow out of the first water outlet pipe 5 to be recycled in the recycling tank 3, and finally, the rainwater can be used as a water source of a high-speed road or used for irrigation and the like after being discharged into an external water pipeline.

In order to treat toxic substances in rainwater and improve the quality of rainwater recycling, the preferred technical scheme is that the sterilizing device comprises a sterilizing pond 6 and a clean water pond 8, the first water outlet pipe 5 is far away from one end pipe orifice of the rainwater collecting channel 1 and the sterilizing pond 6, one end pipe orifice of the overflow pipe 7 and the sterilizing pond 6 are communicated near the top end, the other end pipe orifice of the overflow pipe 7 is communicated with the clean water pond 8, one end pipe orifice of the second water pipe 9 is communicated with the clean water pond 8, the other end pipe orifice of the second water pipe 9 is communicated with the recycling water pond 3, and a sterilizing air pipe 11 is arranged on the outer wall of the sterilizing pond 6. The disinfection air pipe 11 is externally connected with chlorine, and can disinfect the rainwater treated by the artificial wetland to kill microorganisms such as harmful bacteria in the water. The clean water sterilized by the sterilizing tank 6 overflows to the clean water tank 8 through the overflow pipe 7, then flows into the reuse water tank 3 through the clean water tank 8, and finally is discharged into an external water pipeline.

In order to reduce the treatment cost of the reuse water and abandon the rainwater containing more silt and pollutants, the preferable technical scheme is that the rainwater abandoning device is further included, the rainwater abandoning device comprises a rainwater abandoning well 12, a raindrop sensor 13, a valve 16 and a first single chip microcomputer 14 for controlling the valve 16 to be opened and closed, the rainwater abandoning well 12 is a hollow box body, a pipe orifice at one end, far away from the rainwater collecting channel 1, of the first water pipe 4 is communicated with the rainwater abandoning well 12, a first groove body 17 is arranged on the outer wall of the rainwater abandoning well 12, the raindrop sensor 13 extending into the air is arranged on the outer wall of the first groove body 17, the first single chip microcomputer 14 is arranged in the first groove body 17, the valve 16 for opening and closing the water flow is arranged on the first water pipe 4, and a pipe orifice at one end of the second water outlet pipe 18 is communicated with the rainwater abandoning well 12, the other end of the second water outlet pipe 18 is communicated with one end of the filter tank 28 close to the fine stone layer 29, the raindrop sensor 13 is electrically connected with the first single chip microcomputer 14, and the first single chip microcomputer 14 is electrically connected with the valve 16. The raindrop sensor 13 detects whether it rains and the rainfall, when it rains, the raindrop sensor 13 sends detected information to the first single chip microcomputer 14, the first single chip microcomputer 14 analyzes and judges the information, when the rainfall exceeds a preset rainfall value, it is judged that it rains, at this time, 10 minutes can be delayed, then a command is sent to control to open the valve 16, at this time, the rainwater enters the rainwater discarding well 12, and then flows into the artificial wetland through the second water outlet pipe 18 to be processed. When the rain drops do not fall, the first single chip microcomputer 14 judges that the rain drops do not fall when the rain drops are not detected by the rain drop sensor 13, and at the moment, the valve is closed. The initial rainwater is abandoned under the action of the rainwater abandoning device, and the rainwater about 10 minutes before raining is abandoned, so that part of rainwater contains more silt and sundries, the pollution concentration is higher, and the recycling is not economical.

In order to protect the sensor and prevent large particles such as hailstones from damaging the sensor, the preferable technical scheme is that a filter screen 15 wrapping the raindrop sensor 13 is arranged on the raindrop sensor 13, and the bottom of the filter screen 15 is fixedly connected with the outer wall of the abandoning well 12.

In order to fully reuse rainwater and reduce the waste of water resources, the preferable technical scheme is that a flow sensor 19 is arranged in the first water pipe 4 and close to the rainwater collecting channel 1, and the flow sensor 19 is electrically connected with the single chip microcomputer 14. The flow sensor 19 can detect the water flow in the first water pipe 4, when the raindrop sensor 13 cannot detect the rainfall, the valve 16 is not closed by the single chip microcomputer 14 when the flow sensor 19 detects the existence of the flow, and until no flow is detected by the flow sensor 19, which indicates that no water flows in the first water pipe 4, the valve 16 is closed by the single chip microcomputer 14. When the rain is not in place, some residual rainwater is collected and taken, and detection control is performed through the flow sensor 19, so that the rainwater can be fully utilized, and the rainwater waste is reduced.

In order to ensure the continuous supply of reuse water, the preferred technical scheme is that the device further comprises an automatic water replenishing device, the automatic water replenishing device comprises a spare water tank 20, a liquid level meter 21, a microprocessor 22 and a first water valve 23, the spare water tank 20 is arranged at a position close to the reuse water tank 3, a second groove body 24 is arranged on the outer wall of the spare water tank 20, the microprocessor 22 is arranged in the second groove body 24, the spare water tank 20 is communicated with the reuse water tank 3 through a third water pipe 25, the third water pipe 25 is provided with the first water valve 23 for opening and closing water flow, the liquid level meter 21 is arranged on the inner wall of the reuse water tank 3, the liquid level meter 21 is electrically connected with the microprocessor 22, and the microprocessor 22 is electrically connected with the first water valve 23. The liquid level meter 21 can detect the water level in the reuse water tank 3, when the water level is lower than a warning value, normal water supply is affected, at the moment, the processor 22 starts the water valve 23, and water in the standby water tank flows into the reuse water tank 3; when the water level detected by the liquid level meter 21 exceeds a warning value, the water valve 23 is closed, and the treated rainwater is used. The automatic water replenishing device can ensure the continuous water supply of the rainwater recycling system by the constructed wetland purification method, and the stability of the system is improved.

In order to prevent the loss caused by the leakage of rainwater in the artificial wetland, the preferable technical scheme is that a waterproof layer 26 is wrapped on the underground part of the artificial wetland 2, and a pipe orifice at one end of the first water pipe 5, which is close to the artificial wetland 2, is communicated with the waterproof layer 26.

In order to ensure the quality of the reuse water, the preferable technical scheme is that the reuse water monitoring device further comprises a reuse water monitoring device, the reuse water monitoring device comprises a second water valve 35, a high-pressure pump 36, a water quality monitoring sensor 37, a second single chip microcomputer 38, a fourth water outlet pipe 39 and a water return pipe 40, the second single chip microcomputer 38 is used for receiving the water quality parameters detected by the water quality monitoring sensor 37, analyzing, comparing, controlling the second water valve 35 to open and close, controlling the high-pressure pump 36 to open and close, a third groove body 41 is arranged on the outer wall of the reuse water tank 3, the second single chip microcomputer 38 is arranged in the third groove body 41, a pipe orifice at one end of the fourth water outlet pipe 39 is communicated with the reuse water tank 3, a pipe orifice at the other end of the fourth water outlet pipe 39 is communicated with an external water using pipeline, the second water valve 35 is arranged on the fourth water outlet pipe 39, the water quality monitoring sensor 37 is arranged at, the recycling water tank 3 is internally provided with a high-pressure pump 36, a pipe orifice at one end of the water return pipe 40 is communicated with the high-pressure pump 36, a pipe orifice at the other end of the water return pipe 40 is communicated with one end of the filter tank 28 close to the fine stone layer 29, and the second single chip microcomputer 38 is electrically connected with the second water valve 35, the high-pressure pump 36 and the water quality monitoring sensor 37 respectively. The water quality monitoring sensor 37 can detect the parameters of the water in the reuse water tank 3 and transmit the parameters to the second single chip microcomputer 38, the second single chip microcomputer compares the data with the standard water data, when the parameters are lower than the standard water, the second single chip microcomputer 38 closes the second water valve 35 and simultaneously opens the high-pressure pump 36, the water in the reuse water tank 3 is pumped into the filter tank 28 and is filtered again and is treated by the artificial wetland until the water quality monitoring sensor 37 detects that the water in the reuse water tank 3 reaches the standard, at the moment, the second single chip microcomputer 38 opens the second water valve 35 and closes the high-pressure pump 36, so that the water in the reuse water tank 3 is supplied to an external water pipeline. The water supplied to the external water pipeline can be effectively guaranteed to reach the standard through the reuse water monitoring device, so that the quality of the reuse water is guaranteed.

Claims

1. The utility model provides a constructed wetland purification method rainwater recycling system which characterized in that: comprises a rainwater collecting channel (1), an artificial wetland (2), a reuse water pool (3), a filtering tank (28), a shunt pipe (32) and a plurality of seepage pipes (33), wherein the filtering tank (28) is arranged above the artificial wetland (2) and is close to the rainwater collecting channel (1), a fine stone layer (29), a fine sand layer (30) and an activated carbon layer (31) are sequentially arranged in the filtering tank (28), the shunt pipe (32) is arranged between the filtering tank (28) and the artificial wetland (2) in the horizontal direction, the seepage pipes (33) which are uniformly distributed at a plurality of intervals are arranged in the shunt pipe (32) and the artificial wetland (2) in the vertical direction, seepage holes (34) which are uniformly distributed at a plurality of intervals are radially arranged on the pipe wall of one end which is close to the artificial wetland on the seepage pipe (33), and the rainwater collecting channel (1) is communicated with the pipe orifice of one end of a first water pipe (4), the other end of the first water pipe (4) is communicated with one end of the filter tank (28) close to the fine stone layer (29), one end of the filter tank (28) close to the activated carbon layer (31) is communicated with a pipe orifice at one end of the shunt pipe (32), the other end pipe orifice of the shunt pipe (32) is closed, one end pipe orifices of the plurality of seepage pipes (33) are communicated with the middle part of the shunt pipe (32), the other end pipe orifices of the plurality of seepage pipes (33) are inserted into the water containing space in the artificial wetland (2), a first water outlet pipe (5) is arranged on the artificial wetland (2), a pipe orifice at one end of the first water outlet pipe (5) is communicated with the water containing space of the artificial wetland (2), the other end pipe orifice of the first water outlet pipe (5) is communicated with the reuse water tank (3), and the reuse water tank (3) is communicated with an external water pipeline;

the disinfection device comprises a disinfection tank (6) and a clean water tank (8), wherein a pipe orifice at one end, far away from the rainwater collecting channel (1), of the first water outlet pipe (5) is communicated with the disinfection tank (6), a pipe orifice at one end of an overflow pipe (7) is communicated with the position, close to the top end, of the disinfection tank (6), a pipe orifice at the other end of the overflow pipe (7) is communicated with the clean water tank (8), a pipe orifice at one end of a second water pipe (9) is communicated with the clean water tank (8), a pipe orifice at the other end of the second water pipe (9) is communicated with the reuse water tank (3), and a disinfection air pipe (11) is arranged on the outer wall of the disinfection tank (;

still include reuse water monitoring devices, reuse water monitoring devices includes second water valve (35), high-pressure pump (36), water quality monitoring sensor (37), second singlechip (38), fourth outlet pipe (39), wet return (40), second singlechip (38) are used for receiving the quality of water parameter that water quality monitoring sensor (37) detected and carry out the analysis and compare, control second water valve (35) are opened and are closed, control high-pressure pump (36) are opened and are closed, be provided with third recess body (41) on the outer wall of reuse water basin (3), be provided with second singlechip (38) in third recess body (41), the mouth of pipe of fourth outlet pipe (39) one end with reuse water basin (3) intercommunication, the mouth of pipe of the fourth outlet pipe (39) other end and outside water pipeline intercommunication, set up second water valve (35) on fourth outlet pipe (39), the bottom of retrieval and utilization pond (3) is provided with water quality monitoring sensor (37), be provided with high-pressure pump (36) in retrieval and utilization pond (3), wet return (40) one end mouth of pipe with high-pressure pump (36) intercommunication, wet return (40) other end mouth of pipe with filter tank (28) are close to the one end intercommunication of graticule layer (29), second singlechip (38) respectively with second water valve (35), high-pressure pump (36) water quality monitoring sensor (37) electric connection.

2. The constructed wetland purification method rainwater recycling system according to claim 1, characterized in that: the rainwater discarding device comprises a rainwater discarding well (12), a raindrop sensor (13), a valve (16) and a first single chip microcomputer (14) used for controlling the valve (16) to be opened and closed, the rainwater discarding well (12) is a hollow box body, a pipe orifice at one end, far away from the rainwater collecting channel (1), of the first water pipe (4) is communicated with the rainwater discarding well (12), a first groove body (17) is arranged on the outer wall of the rainwater discarding well (12), the raindrop sensor (13) extending into the air is arranged on the outer wall of the first groove body (17), the first single chip microcomputer (14) is arranged in the first groove body (17), the valve (16) used for opening and closing water flow is arranged on the first water pipe (4), and a pipe orifice at one end of a second water outlet pipe (18) is communicated with the rainwater discarding well (12), the other end of the second water outlet pipe (18) is communicated with one end, close to the fine stone layer (29), of the filter tank (28), the raindrop sensor (13) is electrically connected with the first single chip microcomputer (14), and the first single chip microcomputer (14) is electrically connected with the valve (16).

3. The constructed wetland purification method rainwater recycling system according to claim 2, characterized in that: a flow sensor (19) is arranged in the first water pipe (4) and close to the rainwater collecting channel (1), and the flow sensor (19) is electrically connected with the first single chip microcomputer (14).

4. The constructed wetland purification method rainwater recycling system according to claim 1, characterized in that: also comprises an automatic water replenishing device, the automatic water replenishing device comprises a standby water tank (20), a liquid level meter (21), a microprocessor (22) and a first water valve (23), the spare water tank (20) is arranged at a position close to the reuse water pool (3), a second groove body (24) is arranged on the outer wall of the standby water tank (20), the microprocessor (22) is arranged in the second groove body (24), the spare water tank (20) is communicated with the reuse water pool (3) through a third water pipe (25), a first water valve (23) for opening and closing water flow is arranged on the third water pipe (25), a liquid level meter (21) is arranged on the inner wall of the reuse water tank (3), the liquid level meter (21) is electrically connected with the microprocessor (22), the microprocessor (22) is electrically connected with the first water valve (23).