A rainwater and ashwater combined recycling device

Abstract

The invention discloses a rainwater-graywater combined recycling device, comprising a rainwater collection and treatment system, a graywater collection and treatment system, a water collection system, an automatic control system, pipelines and accessories. The rainwater collection and treatment system mainly comprises a rainwater collection box, a high-turbidity rainwater separation box, and a rain garden connected in sequence by pipelines; the graywater collection and treatment system mainly comprises a graywater collection box, a pre-processor, and a rain garden connected in sequence by pipelines; the water collection system is composed of a first water collection box, a secondary processor, and a second water collection box connected in sequence by pipelines; the COD meter, a liquid level timer, a flow meter, a hygrometer, a turbidity meter, and a liquid level meter in the automatic control system are connected to a PLC controller, and the PLC controller is connected to a solenoid valve and a water pump; the pipelines and accessories include a float valve, a gate valve, a check valve, pipelines, and electric wire pipelines. The device uses a rain garden to process rainwater and gray water, saves irrigation water, and is economically feasible.

Description

Technical Field

[0001] The invention relates to the technical field of municipal engineering, in particular to a rainwater and greywater combined recycling device. Background Art

[0002] At present, the quality of rainwater is relatively good, and it has always been one of the preferred sources of reclaimed water. The current rainwater purification technology uses physical and chemical methods to treat rainwater through flocculants, quartz sand, activated carbon, etc. and then reuse it. This treatment method requires the consumption of certain chemical agents, regular cleaning of filter materials, regeneration of filter materials, and even repurchase of filter materials, so professional maintenance personnel are required to perform regular maintenance. The rain garden consists of a vegetation layer, a filler layer (matrix layer), a gravel layer, etc., which can treat rainwater. Using the rain garden for treatment does not require filter materials and other chemical agents, and it also has the effect of beautifying the environment, which is welcomed by most areas; when there is no rainfall, the vegetation in the rain garden needs a certain amount of irrigation water for watering. The plants in the rain garden are usually pollution-resistant and flood-resistant plants, and there are fewer drought-resistant plants, which makes the rain garden in water-scarce areas rainwater treatment and reuse subject to certain restrictions.

[0003] Therefore, in order to overcome the above problems, how to design a rainwater and graywater combined recycling device has become our current problem. We introduce high-quality graywater and use it as a source of reclaimed water during non-rainy periods. On the one hand, it can be reused, and on the other hand, it can be used to irrigate the rain garden. Summary of the invention

[0004] The object of the present invention is to provide a rainwater-graywater combined recycling device to solve the problems raised in the above background technology, such as the lack of grey water sources when it is not raining and the need to supplement fresh irrigation water for rain gardens.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rainwater and gray water combined reuse device, comprising a rainwater collection and treatment system, a gray water collection and treatment system, a water collection system, an automatic control system, pipelines and accessories, wherein the rainwater collection and treatment system comprises a rainwater collection box, a high turbidity rainwater separation box, and a rain garden; the gray water collection and treatment system consists of a gray water collection box, a pre-treatment unit, and a rain garden; the water collection system consists of a first water collection box, a secondary treatment unit, and a second water collection box; the automatic control system consists of a COD meter, a liquid level timer, a flow meter, a turbidity meter, a humidity meter, a spare water inlet, 4 liquid level meters, 7 solenoid valves, two water pumps, and 1 set of PLC controllers; the pipelines and accessories include 4 float valves, 2 gate valves, 4 check valves, and pipelines and electrical wires.

[0006] Furthermore, the rainwater collection tank and the gray water collection tank are separated into two independent water collection tanks by a partition, and the first water collection tank and the second water collection tank are also separated into two independent water collection tanks by a partition.

[0007] Furthermore, the rainwater collection tank and the gray water collection tank are connected to the high turbidity rainwater separation tank and the pre-processor respectively through pipelines and under the control of two solenoid valves.

[0008] Furthermore, the high turbidity rainwater separation box and the pre-treatment unit are connected to the rain garden through pipelines, and a check valve is used to prevent water from flowing back into the high turbidity rainwater separation box.

[0009] Furthermore, the rain garden is connected to the first water collecting tank through a pipeline, and the second water collecting tank is connected to the secondary processor through a pipeline.

[0010] Furthermore, the solenoid valve, humidity meter, COD meter, turbidity meter, liquid level meter, liquid level timer, water pump, and flow meter are connected to the PLC controller through electrical wires and pipelines.

[0011] Compared with the prior art, the beneficial effects of the present invention are: this kind of rainwater-gray water combined recycling device has a reasonable structural design and has the effects of environmental protection and energy saving. It not only fully collects and utilizes rainwater, but also can use gray water for compensation during the dry season. On the one hand, it supplements the recycled water source, and on the other hand, it also uses gray water to irrigate the rain garden in the dry season, saving the water source required for irrigation of the rain garden. With the help of the automatic control system, the device gives full play to the advantages of building water reuse brought about by the combined use of rainwater and gray water. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The connection and working diagram of the present invention is shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in Figure 1 The overall schematic diagram of the device is shown in Figure 2. Figure 2 Detailed drawings of rainwater and greywater collection tanks, Figure 3 This is a detailed drawing of the high turbidity rainwater separation box. Figure 4 Detailed drawing of rain garden and water collection tank.

[0013] In the figure: 1-gray water collection box; 2-rainwater collection box; 3-high turbidity rainwater separation box; 4-rainwater garden; 5-first water collection tank; 6-second water collection tank; 7-pre-processor; 8-secondary processor; 9-partition one; 9a-partition two; 10-float valve one; 10a-float valve two; 10b-float valve three; 10c-float valve four; 11-solenoid valve one; 11a-solenoid valve two; 11b-solenoid valve three; 11c-solenoid valve four; 11d-solenoid valve five; 11e-solenoid valve six; 11f-solenoid valve seven; 12-gate valve one; 12a-gate valve two; 13-spare water inlet; 14-turbidity meter; 15-water pump one; 15a-water pump two; 16-check valve one; 16a-check valve two; 16b-check valve three; 16c-check valve four; 17-flow meter; 18-humidity meter; 19-COD meter; 20-liquid level meter one; 20a-liquid level meter two; 20b-liquid level meter three; 20c-liquid level meter four; 21-liquid level timer; 22-pipeline; 23-electrical wires and pipelines. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The present invention provides a technical solution: a rainwater and graywater combined recycling device, wherein the graywater collection box 1 and the rainwater collection box 2 are independently separated by a partition 9, the graywater collection box 1, the rainwater collection box 2 and the partition 9 are made of galvanized material or stainless steel, the water inlet of the graywater collection box 1 is provided with a solenoid valve 11, the graywater collection box 1 is provided with a liquid level meter 3 20b, the water inlet of the rainwater collection box 2 is provided with a float valve 10, the rainwater collection box 2 has a liquid level meter 4 20c, the water outlets of the two water tanks are both provided with a gate valve 12, the high turbidity rainwater separation box 3 is installed in the rainwater collection box 1, and the rainwater collection box 2 is provided with a float valve 10. The rainwater collection box 2 has a liquid level meter 4 20c, and the water outlets of the two water tanks are provided with a gate valve 12. The high turbidity rainwater separation box 3 is installed in the rainwater collection box 1. After the water collection tank 2, the high turbidity rainwater separation tank 3 is connected to the rainwater collection tank 2 through a pipe 22, and a solenoid valve 2 11a, a solenoid valve 3 11b, a water pump 15, and a check valve 16 are also arranged in the middle. The high turbidity rainwater separation tank 3 is provided with a spare water inlet 13 at the upper part, a solenoid valve 4 11c at the upper middle part, a turbidity meter 14 at the lower middle part, and a solenoid valve 5 11d at the lower part. The high turbidity rainwater separation tank 3 is connected to the rain garden 4 through a pipe 22, and a check valve 2 16a, a float valve 2 10a, a flow control valve 11d are arranged between the high turbidity rainwater separation tank 3 and the rain garden 4. The gray water collection tank 1 is connected to the pre-processor 7 through a pipe 22, and the pre-processor 7 is connected to the rain garden 4. A humidity meter 18 is provided in the rain garden 4. The rain garden 4 is connected to the first water collection tank 5, and a float valve 3 10b is provided in the middle. A liquid level meter 20 and a COD meter 19 are provided in the first water collection tank 5. The outlet pipeline of the first water collection tank 5 is divided into two routes, one of which is connected to the water pump 2 15a, and the other is controlled by the solenoid valve 6 11e. The outlet pipeline of the water pump 2 15a is provided with a check valve 3 16b. The water pump 2 15a is connected to the secondary processor 8. The secondary processor The outlet pipe of the treatment device 8 is connected to the second water collecting tank 6. The water inlet of the second water collecting tank 6 is provided with a float valve 10c. The second water collecting tank 6 is provided with a liquid level meter 20a, a liquid level timer 21, and a solenoid valve 11f at the bottom. The water outlet of the second water collecting tank 6 is connected to the recycled water pipe and a gate valve 12a is provided in the middle. A partition 9a is provided between the first water collecting tank 5 and the second water collecting tank 6 to separate them into two independent water tanks. All solenoid valves, turbidity meters, flow meters, hygrometers, liquid level meters, liquid level timers, COD meters, and water pumps are connected to the PLC controller through electrical wires and pipelines 23.

[0016] Furthermore, the grey water collection tank 1 collects high-quality grey water from shower drainage and wash basin drainage in the building; the rain water collection tank 2 collects rain water from the roof of the building.

[0017] Furthermore, the rainwater collection box 2 controls water inlet through a float valve 10 to prevent overflow; similarly, the rainwater garden 4, the first water collection tank 5, and the second water collection tank 6 control water inlet through a float valve 2 10a, a float valve 3 10b, and a float valve 4 10c, respectively.

[0018] Furthermore, the water pump 15 is started when the water level of the liquid level meter 3 20b or the liquid level meter 4 20c is low; the water pump 15 stops operating when the water level of the liquid level meter 3 20b and the liquid level meter 4 20c are low.

[0019] In the next step, the backup water inlet 13 is connected to the tap water pipe. When the system lacks rainwater and high-quality gray water, the valve on the tap water pipe can be manually opened to supplement fresh tap water. It also serves as the flushing water inlet of the system and can be used to flush the high turbidity rainwater separation box 3 to avoid affecting the measurement accuracy of the turbidity meter 14.

[0020] Furthermore, the liquid level meter 1 20, liquid level meter 2 20a, liquid level meter 3 20b, and liquid level meter 4 20c are all provided with high water level, middle water level, low water level, and very low water level. When the water level is low, the PLC controller is used to control water replenishment, and when the water level is high, the PLC controller is used to control water replenishment to be closed.

[0021] Furthermore, the solenoid valve 11 is closed when the liquid level meter 3 20b is at a high water level, thereby stopping water inflow; when the liquid level meter 3 20b is at a low water level, and the liquid level meter 4 20c is at a low-low water level, and the humidity meter 18 is activated or the liquid level meter 20 is at a low-low water level, the solenoid valve 11 opens, and gray water begins to enter the gray water collection tank 1.

[0022] Furthermore, the hygrometer 18 is a resistance-type hygrometer, which is buried at a depth of 0.65 meters in the rain garden. When the measured voltage of the hygrometer is less than 1V, the hygrometer is activated and transmits data to the PLC controller, which can open the solenoid valve 11.

[0023] Furthermore, the solenoid valve 2 11a is opened when the water level of the liquid level meter 4 20c is at a low level, and the solenoid valve 3 11b is closed at the same time; the solenoid valve 2 11a is closed when the water level of the liquid level meter 4 20c is above the low level, and the solenoid valve 3 11b is opened at the same time.

[0024] Furthermore, the high turbidity rainwater separation box 3 is provided with a turbidity meter 14. When the turbidity meter 14 detects that the turbidity is greater than 35NTU, the data is transmitted to the PLC controller, and the solenoid valve four 11c is closed by the controller, and the solenoid valve five 11d is opened at the same time to discharge the rainwater with higher turbidity through the solenoid valve five 11d; when the monitoring value of the turbidity meter 14 is less than 35NTU, the solenoid valve five 11d is closed by the controller, and the solenoid valve four 11c is opened at the same time to transmit the rainwater with turbidity meeting the requirements to the rain garden 4.

[0025] Furthermore, the rain garden 4 is set with different surface areas according to the amount of water required to be treated. The rain garden uses sand and soil as the main matrix, the matrix permeability coefficient is greater than 9 cm / s, and the depth is about 1.2 to ensure water collection and treatment effects. The biological retention pool is planted with pollution-resistant and flood-resistant plants such as daylilies, sedum, irises, etc. to ensure plant growth and overall treatment effects.

[0026] Furthermore, a COD meter 19 is provided in the first water collecting tank 5. When the COD meter 19 monitors that the COD value of the water in the first water collecting tank 5 is less than 40 mg / L, the solenoid valve six 11e can be opened through the controller, and the water in the first water collecting tank 5 directly flows into the reuse pipeline for reuse; when the COD meter 19 monitors that the COD value of the water in the first water collecting tank 5 is greater than 40 mg / L, the solenoid valve six 11e is closed through the controller, and the water pump two 15a is turned on to send the water in the first water collecting tank 5 to the secondary processor 8 for treatment, and the treated water will enter the second water collecting tank 6 for reuse.

[0027] Furthermore, the pre-processor 7 is filled with 1-3 mm quartz sand, the diameter is determined according to the water production, and the height is 0.7 m; the secondary processor 8 is filled with fruit granular activated carbon with a particle size of 10-20 mesh, the diameter is determined according to the water production, and the height is 0.8 m.

[0028] Furthermore, the liquid level meter 20 monitors that the first water collecting tank 5 has reached a high water level, the liquid level meter 20a monitors that the second water collecting tank 6 is below the high water level, and the flow meter 17 monitors that the flow value is greater than 1L / s. At this time, the water pump 2 15a is operated by the controller to send the water in the first water collecting tank 5 into the second water collecting tank 6 through the water pump 2 15a until the liquid level meter 20a reaches a high water level, the water pump 2 15a stops running, and the second water collecting tank 6 stops taking in water.

[0029] Furthermore, the liquid level timer 21 starts timing when the liquid level meter 20a in the second water collecting tank 6 reaches above the middle water level, and the liquid level timer 21 is automatically reset when it falls below the middle water level, until the water level in the second water collecting tank 6 is above the middle water level again and starts timing again. When the single timing of the liquid level timer 21 exceeds 48 hours and the flow meter 17 monitors a flow value greater than 1.5L / s, the controller opens the solenoid valve 7 11f to start draining the water stored in the second water collecting tank 6 for a long time and prepare to add fresh water, until the liquid level meter 20a reaches the low water level, the solenoid valve 7 11f is closed to stop draining, and the draining operation will not start until the above conditions are met again.

[0030] Working principle: when the liquid level meter 4 20c in the rainwater collection box 2 is at a low water level, the float valve 10 opens. When the rain starts, the collected roof rainwater begins to enter the rainwater collection box 2. When the liquid level meter 4 20c in the rainwater collection box 2 measures a high water level, the float valve 10 closes, stops the water inlet, and starts the water pump 15. At this time, the liquid level meter 4 20c is above the low water level, the solenoid valve 2 11a is closed, the solenoid valve 3 11b is opened, and the water pump 15 sends the collected rainwater through the check valve 16 into the high turbidity rainwater separation box 3. A turbidity meter 14 is provided in the high turbidity rainwater separation box 3. When the turbidity meter 14 detects that the turbidity is greater than 35NTU, the data is transmitted to the PLC controller, and the solenoid valve four 11c is closed by the controller, and the solenoid valve five 11d is opened at the same time, so that the rainwater with higher turbidity is discharged into the municipal rainwater pipe through the solenoid valve five 11d; when the monitoring value of the turbidity meter 14 is less than 35NTU, the solenoid valve five 11d is closed by the PLC controller, and the solenoid valve four 11c is opened at the same time, and under the action of the check valve four 16c, the rainwater with lower turbidity is sent to the rainwater garden 4 through the pipe 22; after the water inlet of the rainwater garden 4 reaches saturation, the water inlet is closed by the float valve two 10a, and the excess rainwater can be connected to the municipal rainwater pipe for discharge. The water after the physical, chemical and biochemical effects of the rain garden 4 first enters the first water collecting tank 5 through the pipe 22. When the water in the first water collecting tank 5 measures a high water level through the liquid level meter 20, the float valve three 10b is closed, and the excess water can be connected to the municipal rainwater pipe for discharge. The first water collecting tank 5 is provided with a COD meter 19. When the COD meter 19 monitors that the COD value of the water in the first water collecting tank 5 is less than 40 mg / L, the solenoid valve six 11e can be opened through the PLC controller, and the water in the first water collecting tank 5 directly flows into the reuse pipe for reuse; when the COD meter 19 monitors that the COD value of the water in the first water collecting tank 5 is greater than 40 mg / L, the solenoid valve six 11e is closed under the action of the PLC controller, and the water pump two 15a is opened to send the water in the first water collecting tank 5 to the secondary processor 8 for treatment. The treated water then enters the second water collecting tank 6 and flows into the pipe 22 through the gate valve two 12a for reuse. When the liquid level meter 20 monitors that the first water collecting tank 5 has reached a high water level, the liquid level meter 20a monitors that the second water collecting tank 6 is below the high water level, and the flow meter 17 monitors that the flow value is greater than 1L / s, that is, when the first water collecting tank 5 reaches a high water level and the second water collecting tank 6 still has water storage capacity, the water pump 2 15a is operated through the PLC controller to send the water in the first water collecting tank 5 into the second water collecting tank 6 until the liquid level meter 20a reaches a high water level, the water pump 2 15a stops running, and the second water collecting tank 6 stops taking in water. At this time, the water level in the first water collecting tank 5 drops, the float valve 3 10b opens, and the first water collecting tank 5 starts taking in water again until the float valve 3 10b closes at a high water level, thereby stopping the first water collecting tank 5 from taking in water.The hygrometer 18 is a resistance-type hygrometer, buried at a depth of 0.65 meters in the rain garden 4. When the measured voltage of the hygrometer is less than 1V, it indicates that the rain garden 4 is dry and lacks water, and irrigation water needs to be added to the rain garden 4. The hygrometer is activated and transmits data to the PLC controller. The solenoid valve 11 can be opened to allow high-quality gray water to enter the gray water collection tank 1. The high-quality gray water enters the rain garden 4 after being processed by the preprocessor 7; when the liquid level meter 3 20b is at a low water level, the liquid level meter 4 20c is at a low-low water level (indicating that there is no rainwater that can be collected to supplement the rainwater collection tank 2), and the hygrometer 18 is activated or the liquid level meter 20 is at a low-low water level (indicating that there is no water outflow from the rain garden 4 to enter the first water collection tank 5), the solenoid valve 11 is opened, and the high-quality gray water collected from the shower drainage and washbasin drainage in the building begins to enter the gray water collection tank 1; when the solenoid valve 11 is at a high water level of the liquid level meter 3 20b, it is closed to stop the water inlet. At this time, since the liquid level meter 4 20c is at a low water level, under the action of the PLC controller, the solenoid valve 2 11a is opened, and the solenoid valve 3 11b is closed at the same time. The high-quality gray water is sent to the preprocessor 7 for treatment under the action of the water pump 15. The preprocessor 7 mainly filters and precipitates, intercepts various impurities and organic matter, and enters the rain garden 4 under the action of the check valve 2 16a. On the one hand, the high-quality gray water is treated, and on the other hand, the rain garden 4 is irrigated to replenish the water required by the vegetation in the rain garden 4. The high-quality gray water treated by the rain garden 4 flows into the first water collection tank 5 like the treated rainwater. The high-quality gray water can make up for the medium water required when it is not raining, and can also irrigate the rain garden. This is the biggest advantage of the joint reuse of gray water and rainwater. In addition, the device can also update the unused water stored for a long time, mainly through the liquid level timer 21. When the liquid level timer 21 in the second water collecting tank 6 reaches above the middle water level, it starts timing. When it falls below the middle water level, the liquid level timer 21 is automatically reset until the water level in the second water collecting tank 6 is above the middle water level again and starts timing again. When the single timing of the liquid level timer 21 exceeds 48h and the flow meter 17 monitors a flow value greater than 1.5L / s, the controller opens the solenoid valve 7 11f to start draining the water stored for a long time in the second water collecting tank 6 and prepare to add fresh water. When the liquid level meter 20a reaches the low water level, the solenoid valve 7 11f is closed to stop draining, and the draining operation is not started until the above conditions are met again to prevent the water in the second water collecting tank 6 from being stored for too long, thereby breeding bacteria and affecting use. After the system has been running for one month or the rain garden is dry and lacks water and gray water, the spare water inlet 13 is connected to tap water, which can be used to flush the high turbidity rainwater separation box 3 after running for a period of time to avoid affecting the measurement accuracy of the turbidity meter 14; or to supplement the system water when the system lacks both rain water and gray water.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rainwater and greywater combined recycling device, characterized in that: It comprises a rainwater collection and treatment system, a greywater collection and treatment system, a water collection system, an automatic control system, pipelines and accessories. The rainwater collection and treatment system consists of a rainwater collection box (2), a high turbidity rainwater separation box (3) and a rain garden (4) which are sequentially connected by a pipeline (22); the greywater collection and treatment system consists of a greywater collection box (1), a pre-treatment box (7) and a rain garden (4) which are sequentially connected by a pipeline (22); the water collection system consists of a first water collection box (5), a secondary treatment box (8) and a second water collection box (6) which are sequentially connected by pipelines; the automatic control system consists of a COD meter (19), a liquid level timer (21), a flow meter (17), a humidity meter (18), a spare water inlet, a turbidity meter (14), a liquid level meter (15) and a liquid level meter (16). The invention is composed of a level meter 4, electromagnetic valves 1 to 7, water pumps 1 and 2, and a set of PLC controllers, and a COD meter (19), a liquid level timer (21), a flow meter (17), a humidity meter (18), a turbidity meter (14), liquid level meters 1 to 4, electromagnetic valves 1 to 7, water pumps 1 and 2 are connected to the PLC controller through an electric wire pipeline (23); the pipeline and accessories are composed of a pipeline (22), an electric wire pipeline (23), a float valve 1 to 4, a gate valve 1 and 2, and a check valve 1 to 4; a float valve 1 (10) is provided at the water inlet of the rainwater collection box (2), and a liquid level meter 4 (20c) is provided in the rainwater collection box (2); a solenoid valve 1 (11) is provided at the water inlet of the gray water collection box (1), and the gray water collection box (2) is provided with a liquid level meter 4 (20c ... A liquid level meter 3 (20b) is provided in the collecting box (1); the grey water collecting box (1) and the rain water collecting box (2) are separated by a partition (9); the grey water collecting box (1) is connected to the pre-processor (7) and the rain garden (4) in sequence through a pipe (22); the high turbidity rain water separation box (3) is installed behind the rain water collection box (2); a spare water inlet (13) is provided at the upper part of the high turbidity rain water separation box (3); a solenoid valve 4 (11c) is provided at the middle and upper part of the high turbidity rain water separation box (3); a turbidity meter (14) is provided at the middle and lower part of the high turbidity rain water separation box (3); a solenoid valve 5 (11d) is provided at the lower part of the high turbidity rain water separation box (3); the high turbidity rain water separation box (3) is connected to the rain water collection box (2) through a pipe (22); and a solenoid valve 6 (11d) is provided in the middle. A second magnetic valve (11a), a third electromagnetic valve (11b), a water pump (15), and a first check valve (16); the high turbidity rainwater separation box (3) is connected to the rainwater garden (4) through a pipeline (22); a second check valve (16a), a second float valve (10a), and a flow meter (17) are provided between the rainwater garden (4) and the high turbidity rainwater separation box (3); a humidity meter (18) is provided in the rainwater garden (4), and the rainwater garden (4) is connected to the first water collecting tank (5), and a third float valve (10b) is provided in the middle; the first water collecting tank (5) is provided with a liquid level meter (20) and a COD meter (19); the outlet pipeline of the first water collecting tank (5) is divided into two routes, one route is connected to the second water pump (15a), and the other route is controlled by a sixth electromagnetic valve (11e);The water outlet pipe of the second water pump (15a) is provided with a check valve three (16b), and the second water pump (15a) is connected to the secondary processor (8), and the water outlet pipe of the secondary processor (8) is connected to the second water collecting tank (6); a partition plate two (9a) is provided between the second water collecting tank (6) and the first water collecting tank (5) to separate them into two independent water tanks, a float valve four (10c) is provided at the water inlet of the second water collecting tank (6), a liquid level meter two (20a) and a liquid level timer (21) are provided in the second water collecting tank (6), a solenoid valve seven (11f) is provided at the bottom of the second water collecting tank (6), and the water outlet of the second water collecting tank (6) is connected to the recycled water pipe and a gate valve two (12a) is provided in the middle. ; 2. A rainwater and ashwater combined recycling device according to claim 1, characterized in that: The standby water inlet (13) is connected to a tap water pipe.

3. The rainwater and ashwater combined recycling device according to claim 1 is characterized by: The hygrometer (18) is a resistance-type hygrometer, which is buried at a depth of 0.65 meters in the rain garden (4).

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