Water purification system

Abstract

A water purification system comprises a source water pool, a natural water channel, seven water drop pools and a large water pool, the number of the source water pool, the number of the natural water channel, the number of the water drop pools and the number of the large water pool are marked as a tenth water pool, and the set heights of the source water pool, the natural water channel, the water drop pools and the large water pool are reduced step by step. Water in the source water pool flows into the natural water channel, then sequentially falls into the seven water falling pools to be purified step by step and finally falls into the large water pool, and a water pump is arranged in the large water pool and used for pumping the water into the source water pool again to be circularly treated; according to the invention, no chemical agent is added, water flows through the sedimentation tank to settle silt, then naturally falls off, and naturally flows in the whole process through a series of circulating treatment such as cobblestones, volcanic rocks, gravels, pumice stones and filter cotton, so that the water purification effect can be achieved without artificial participation, time and labor are saved, and the water purification efficiency is improved. No pollution is caused.

Description

Technical Field

[0001] The invention belongs to the field of water purification, and in particular relates to a water purification system. Background Art

[0002] The water in the pond is mostly stagnant water. The biggest problem is that the water is fixed and does not flow. As the saying goes, running water does not rot, and door hinges do not rot. Over time, bacteria in the pond water will continue to grow and multiply, the suspended matter content is high, silt and sediment are precipitated, and the overall transparency becomes very poor, which not only affects the natural beauty, but also pollutes the environment. In order to improve the water quality of the pond in the prior art, a part of the water is often released regularly, and then an appropriate amount of new water is injected, or the pond is thoroughly cleaned to purify the water. This method is not only time-consuming and labor-intensive, but also causes a waste of some water resources. In addition, another treatment method in the prior art is to put chemicals such as potassium permanganate and polyaluminum chloride into the water to purify the water quality, but it is difficult to master the exact dosage in this method, and because of the addition of chemicals, secondary pollution will occur, which is not environmentally friendly. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a water purification system, which is as follows: A water purification system comprises a No. 1 pool, a No. 2 water system, a No. 3 pool, a No. 4 pool, a No. 5 pool, a No. 6 pool, a No. 7 pool, a No. 8 pool, a No. 9 pool and a No. 10 pool, wherein a water inlet is provided on the No. 1 pool, the No. 1 pool is a source pool, the No. 2 water system is a natural canal, the No. 3 pool to the No. 9 pool are waterfall pools, the top surfaces of the No. 1 pool to the No. 10 pool are all on the same plane as the ground, the No. 10 pool is a large pool, and the heights of the No. 1 pool to the No. 10 pool are arranged to decrease in a gradient in sequence, and the gradient difference is 40-50°C. m, the water in the No. 1 pool flows into the No. 2 water system, and then falls into the No. 3 to No. 9 pools in sequence for purification, and finally falls into the No. 10 pool. A water pump is provided in the No. 10 pool, and one end of a water outlet pipe is connected to the water pump, and the other end of the water outlet pipe is connected to the water inlet. The water pump pumps the water into the No. 1 pool again through the water outlet pipe for circulation treatment; the No. 3 to No. 8 pools are all planted with one or any combination of aquatic plants such as reed, water plantain, calamus, lotus, pickerel grass, water nymph, duckweed, foxtail algae, duckweed, water hyacinth and water celery.

[0004] Moreover, the No. 1 water pool is composed of sedimentation pool 1, sedimentation pool 2 and sedimentation pool 3. Several planting pools are randomly arranged in sedimentation pool 3 for planting plants to increase the beauty of the pool. The setting heights of sedimentation pool 1, sedimentation pool 2 and sedimentation pool 3 are gradually reduced in sequence. The water in the No. 10 water pool is first pumped into sedimentation pool 1, and the water flow of sedimentation pool 1 passes through sedimentation pool 2 and sedimentation pool 3 in sequence. The sedimentation pool 3 is provided with an outlet, and a water outlet device 1 is installed at the outlet. The water outlet device 1 is composed of a water trough 1 and a filter cotton 1. The edge of the water trough 1 extends out of the edge of the outlet of the No. 1 water pool. A filter cotton 1 is arranged below the outlet of the No. 1 water pool. The height of the water trough 1 is higher than that of the filter cotton 1 and is arranged in a gradient. The water flows out through the outlet of the sedimentation pool 3, falls through the water trough 1 to the filter cotton 1 for filtration, and then flows into the No. 2 water system.

[0005] Furthermore, the bottom of the No. 2 water system is covered with a mixture of volcanic rocks and gravel.

[0006] Moreover, four gabions are arranged at the entrance of the No. 3 water pool from upstream to downstream, namely, a pebble gabion one, a large gravel gabion one, a volcanic rock gabion, and a small gravel gabion one; a pumice gabion is arranged in the central part of the No. 3 water pool, and a water outlet device three is arranged at the outlet of the No. 3 water pool, and the water outlet device three comprises a volcanic rock gabion, a water trough two, a gravel gabion one and filter cotton two; the water trough two and the gravel gabion one are arranged adjacent to each other and their surfaces are on the same horizontal plane; the gravel gabion one is located below the water trough two and is arranged in a gradient with the water trough two; a layer of filter cotton two is laid on the gravel gabion one, and the edge of the water trough two extends out of the edge of the outlet of the No. 3 water pool.

[0007] Moreover, the particle size of pebbles in the gabions is 3-5cm, the particle size of large gravel is 2-4cm, the particle size of volcanic rock is 3-5cm, the particle size of small gravel is 0.5-1cm, and the particle size of pumice is 2-4cm; the setting widths of the pebble gabion 1, the large gravel gabion 1, the volcanic rock gabion, the small gravel gabion 1 and the pumice gabion are all the same as the width of the No. 3 water pool. The water flows through the pebble gabion 1, the large gravel gabion 1, the volcanic rock gabion, the small gravel gabion 1, and the pumice gabion in sequence, and then is filtered through the pumice gabion, and then passes through the volcanic rock gabion and the water trough 2 at the outlet, falls into the filter cotton 2, and then flows into the No. 4 water pool after being filtered through the gravel gabion 1.

[0008] Moreover, a water outlet device 4 is provided at the outlet of the No. 4 water pool, and the water outlet device 4 includes a pebble gabion 2, a gravel gabion 2, a water trough 3 and a filter cotton 3. The pebble gabion 2 and the water trough 3 are adjacently arranged and their surfaces are at the same height. The edge of the water trough 3 extends out of the edge of the outlet of the No. 4 water pool. The gravel gabion 2 is located below the water trough 3 and is arranged in a gradient manner. A layer of filter cotton 3 is laid on the gravel gabion 2. After the water flows through the pebble gabion 2, it passes through the water trough 3 and falls onto the filter cotton 3 for filtration, and then passes through the gravel gabion 2 and flows into the No. 5 water pool; the particle size of the pebbles is 0.5-1cm, and the particle size of the gravel is 3-5cm.

[0009] Moreover, a water outlet device five is provided at the outlet of the No. 5 water tank, and the water outlet device five comprises two large gravel gabions, four water troughs and two small gravel gabions. The two large gravel gabions and the four water troughs are adjacent to each other and their surfaces are at the same height. The two small gravel gabions are located below the four water troughs and are arranged in a gradient manner. The edge of the four water troughs extends out of the edge of the outlet of the No. 5 water tank; four filter cottons are laid on the two small gravel gabions. After passing through the two large gravel gabions, the water is injected into the four water troughs and then falls onto the four filter cottons, and then flows into the No. 6 water tank after passing through the two small gravel gabions; in the two large gravel gabions, the particle size of the large gravel is 2-3cm, and the particle size of the small gravel in the two small gravel gabions is 0.5-1cm; the outlet settings of the No. 6 water tank to the No. 8 water tank are the same as those of the No. 5 water tank.

[0010] Moreover, shellfish are cultured in the No. 9 pool.

[0011] Moreover, the shellfish aquatic animals are field snails and river clams. Field snails and river clams obtain food by sucking bacteria and organic debris in the sludge. They also usually eat food residues and nutrients in the water, which can not only improve the water quality but also increase the transparency of the water. In this way, it can not only purify the water quality, but also clean up aquatic plants and moss, slowing down the rate of water quality deterioration.

[0012] Moreover, ecological floating beds are planted in the No. 3 to No. 9 pools. The ecological floating beds can adapt to local conditions, improve the biosphere, provide habitats for organisms, and improve ecological stability.

[0013] The beneficial effects of the present invention are as follows: The present invention provides a water purification system without adding any chemical agents. Water flows through a sedimentation tank to precipitate silt, and then falls naturally, and passes through a series of circulation treatments such as pebbles, volcanic rocks, gravel, pumice, filter cotton, etc. The whole process flows naturally and does not require human participation. The pores between the stones have a filtering effect on suspended particles in the water, and the stone surface contacts the air, which can promote the decomposition of BOD in the water, thereby achieving the effect of water purification, saving time and effort, and being pollution-free.

[0014] 2. The present invention purifies water through a waterfall system. The waterfall process is a process of aerating the water. The waterfall can be aerated and oxygenated by the drop difference to increase the oxygen content of the water body, provide conditions for the survival of microorganisms in the water, and improve the water quality.

[0015] 3. The present invention plants aquatic plants in water. When the aquatic plants carry out photosynthesis, they can absorb carbon dioxide in the environment and release oxygen. The leaves of the aquatic plants can slow down the water flow and absorb suspended matter. The roots can absorb heavy metals, nitrogen, phosphorus, and potassium, thereby increasing oxygen for the water body and promoting the reproduction of microorganisms. The oxygen produced by the roots can oxidize and decompose nearby sediments, fix carbon and release oxygen, and absorb many harmful elements in the water body, thereby eliminating pollution, purifying water quality, improving water quality, and restoring the ecological function of the water body.

[0016] 4. The present invention cultivates shellfish in a pond. The shellfish obtain food by sucking bacteria and organic debris in the sludge. They also eat food residues and nutrients in the water at ordinary times, which can improve the water quality and increase the transparency of the water. In this way, it can not only purify the water quality, but also clean up aquatic plants and moss, slowing down the deterioration of water quality.

[0017] 5. The present invention plants ecological floating beds in the pool, and utilizes biochemical reactions and the absorption and degradation of microorganisms to purify sewage. The ecological floating beds can be adapted to local conditions, improve the biosphere, provide habitats for organisms, and improve ecological stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic plan view of a water purification system of the present invention; Figure 2 Schematic diagram of water cycle of the present invention; Figure 3 This is a picture of pool number one; Figure 4 This is a picture of the No. 2 water system; Figure 5 This is a picture of pool number three; Figure 6 This is a picture of pool number four; Figure 7 This is a picture of the exit of pool No. 4; Figure 8 This is a picture of the exit of the No. 5 pool; Fig. 9 is an enlarged view of the water outlet device 1; Fig.10 This is a three-dimensional picture of the No. 3 pool; Fig.11 is an enlarged view of the water outlet device 4; Fig.12 This is an enlarged view of the water outlet device five.

[0019] In the figure, 1, water tank No. 1; 101, sedimentation tank No. 1; 102, sedimentation tank No. 2; 103, sedimentation tank No. 3; 104, planting tank; 105, water channel No. 1; 106, filter cotton No. 1; 1001, water outlet device No. 1; 2, water system No. 2; 3, water tank No. 3; 301, pebble gabion No. 1; 302, large gravel gabion No. 1; 303, volcanic rock cage; 304, small gravel gabion No. 1; 305, pumice gabion; 306, volcanic rock cage; 307, water channel No. 2; 308, gravel gabion No. 1; 309, filter Cotton 2; 3001, water outlet device 3; 4, No. 4 pool; 401, pebble gabion 2; 402, gravel gabion 2; 403, water channel 3; 404, filter cotton 3; 4001, water outlet device 4; 5, No. 5 pool; 501, large gravel gabion 2; 502, water channel 4; 503, small gravel gabion 2; 5001, water outlet device 5; 6, No. 6 pool; 7, No. 7 pool; 8, No. 8 pool; 9, No. 9 pool; 10, No. 10 pool; 11, water inlet; 12, water pump; 13, water outlet pipe; DETAILED DESCRIPTION Example

[0020] A water purification system comprises a No. 1 pool 1, a No. 2 water system 2, a No. 3 pool 3, a No. 4 pool 4, a No. 5 pool 5 and a No. 10 pool 10, wherein the No. 1 pool 1 is provided with a water inlet 11, the No. 1 pool 1 is a source pool, the No. 2 water system 2 is a natural canal, the No. 3 pool 3 to the No. 5 pool 5 are waterfall pools, the top surfaces of the No. 1 pool 1 to the No. 10 pool 10 are all on the same plane as the ground plane, the No. 10 pool 10 is a large pool, the No. 1 pool 1 to the No. 10 pool 10 are arranged with a gradient reduction in height, the gradient difference is 45 cm, and the water in the No. 1 pool 1 flows into the No. 1 pool 1. The No. 2 water system 2 then falls into the No. 3 pool 3 to the No. 5 pool 5 in sequence for purification, and finally falls into the No. 10 pool 10. The No. 10 pool 10 is provided with a water pump 12, and the water pump 12 is connected to one end of a water outlet pipe 13, and the other end of the water outlet pipe 13 is connected to the water inlet 11. The water pump 12 pumps the water into the No. 1 pool 1 again through the water outlet pipe 13 for circulation treatment; the No. 3 pool 3 to the No. 5 pool 5 are all planted with one or any combination of aquatic plants such as reed, water onion, calamus, lotus, pickerel grass, water nymph, duckweed, foxtail algae, duckweed, water hyacinth and water celery.

[0021] Furthermore, the bottom surface of the No. 2 water system 2 is paved with a mixture of volcanic rocks and gravel.

[0022] Furthermore, four gabions, namely, a pebble gabion 301, a large gravel gabion 302, a volcanic rock gabion 303, and a small gravel gabion 304, are sequentially arranged at the entrance of the No. 3 water pool 3 from upstream to downstream; a pumice gabion 305 is arranged in the central part of the No. 3 water pool 3, and a water outlet device 3001 is arranged at the outlet of the No. 3 water pool 3, the water outlet device 3001 comprises a volcanic rock cage 306, a water trough 307, a gravel gabion 308 and a filter cotton 2 309, the water trough 307 and the gravel gabion 308 are arranged adjacent to each other and their surfaces are on the same horizontal plane, the gravel gabion 308 is located below the water trough 307 and is arranged in a gradient with the water trough 307, a layer of filter cotton 2 309 is laid on the gravel gabion 308, and the edge of the water trough 307 extends out of the edge of the outlet of the No. 3 water pool 3.

[0023] Furthermore, the particle size of the pebbles in the gabions is 3-5 cm, the particle size of the large gravel is 2-4 cm, the particle size of the volcanic rock is 3-5 cm, the particle size of the small gravel is 0.5-1 cm, and the particle size of the pumice is 2-4 cm; the widths of the pebble gabion 301, the large gravel gabion 302, the volcanic rock cage 303, the small gravel gabion 304 and the pumice gabion 305 are all the same as the width of the third water pool 3, and the water flows through the pebble gabion 301, the large gravel gabion 302, the volcanic rock cage 303, the small gravel gabion 304 are filtered in sequence, and then filtered through the pumice gabion 305, and then through the volcanic rock cage 306 and the water trough 307 at the outlet, and then falls into the filter cotton 2 309, and then filtered through the gravel gabion 308 and flows into the fourth water pool 4.

[0024] Furthermore, a water outlet device 4001 is provided at the outlet of the fourth water pool 4, and the water outlet device 4001 includes a pebble gabion 401, a gravel gabion 402, a water trough 403 and a filter cotton 3 404. The pebble gabion 401 and the water trough 403 are adjacently arranged and their surfaces are at the same height. The edge of the water trough 403 extends out of the edge of the outlet of the fourth water pool 4. The gravel gabion 402 is located below the water trough 403 and is arranged in a gradient manner. A layer of filter cotton 3 404 is laid on the gravel gabion 402. After water flows through the pebble gabion 401, it passes through the water trough 403 and falls onto the filter cotton 3 404 for filtration, and then passes through the gravel gabion 402 and flows into the fifth water pool 5; the particle size of the pebbles is 0.5-1cm, and the particle size of the gravel is 3-5cm.

[0025] Furthermore, a water outlet device 5001 is provided at the outlet of the fifth water pool 5, and the water outlet device 5001 includes a large gravel gabion 2 501, a water trough 4 502 and a small gravel gabion 2 503. The large gravel gabion 2 501 and the water trough 4 502 are arranged adjacent to each other and their surfaces are at the same height. The small gravel gabion 2 503 is arranged below the water trough 4 502 in a gradient manner. The edge of the water trough 4 502 extends The edge of the outlet of the fifth water pool 5; the small gravel gabion 2 503 is paved with filter cotton 4 504. After the water flows through the large gravel gabion 2 501, it is injected into the water channel 4 502 and then falls on the filter cotton 4 504, and then flows into the sixth water pool 6 after passing through the small gravel gabion 2 503; in the large gravel gabion 2 501, the particle size of the large gravel is 2-3cm, and the particle size of the small gravel in the small gravel gabion 2 503 is 0.5-1cm. Example

[0026] A water purification system, comprising a No. 1 pool 1, a No. 2 water system 2, a No. 3 pool 3, a No. 4 pool 4, a No. 5 pool 5 and a No. 10 pool 10, wherein the No. 1 pool 1 is provided with a water inlet 11, the No. 1 pool 1 is a source pool, the No. 2 water system 2 is a natural canal, the No. 3 pool 3 to the No. 5 pool 5 are waterfall pools, the top surfaces of the No. 1 pool 1 to the No. 10 pool 10 are all on the same plane as the ground, the No. 10 pool 10 is a large pool, the No. 1 pool 1 to the No. 10 pool 10 are arranged with a gradient reduction in height, the gradient difference is 50 cm, and the water in the No. 1 pool 1 flows into the No. 1 pool 1. The No. 2 water system 2 then falls into the No. 3 pool 3 to the No. 5 pool 5 in sequence for purification, and finally falls into the No. 10 pool 10. The No. 10 pool 10 is provided with a water pump 12, and the water pump 12 is connected to one end of a water outlet pipe 13, and the other end of the water outlet pipe 13 is connected to the water inlet 11. The water pump 12 pumps the water into the No. 1 pool 1 again through the water outlet pipe 13 for circulation treatment; the No. 3 pool 3 to the No. 5 pool 5 are all planted with one or any combination of aquatic plants such as reed, water onion, calamus, lotus, pickerel grass, water nymph, duckweed, foxtail algae, duckweed, water hyacinth and water celery.

[0027] Furthermore, the outlet settings of water pool No. 6 to water pool No. 8 are the same as those of water pool No. 5.

[0028] Furthermore, shellfish are cultured in the No. 9 water pool.

[0029] Furthermore, the shellfish aquatic animals are field snails and river clams.

[0030] Furthermore, ecological floating beds are planted in the water pools No. 3 to No. 9 9. Example

[0031] In this embodiment, on the basis of embodiment 2, the water pool No. 1 is divided into a sedimentation pool 1 101, a sedimentation pool 2 102 and a sedimentation pool 3 103. Several planting pools 104 are randomly arranged in the sedimentation pool 3 103. The setting heights of the sedimentation pool 1 101, the sedimentation pool 2 102 and the sedimentation pool 3 103 are gradually reduced. The water in the water pool No. 10 is first pumped into the sedimentation pool 1 101, and the water flow of the sedimentation pool 1 101 passes through the sedimentation pool 2 102 and the sedimentation pool 3 103 in turn. The sedimentation pool 3 103 is arranged There is an outlet, at which a water outlet device 1001 is installed, the water outlet device 1001 is composed of a water chute 105 and a filter cotton 106, the edge of the water chute 105 extends out of the edge of the outlet of the No. 1 water pool 1, a filter cotton 106 is arranged below the outlet of the No. 1 water pool 1, the height of the water chute 105 is higher than the filter cotton 106 and is arranged in a gradient, the water flows out through the outlet of the sedimentation tank 3 103, passes through the water chute 105, falls to the filter cotton 106 for filtration, and then flows into the No. 2 water system 2.

[0032] This comparative example is the same as Example 3 except that the No. 3-9 plunge pools are not provided.

[0033] In this comparative example, the water flow in each pool is set to flow at a gentle slope from high to low, and no waterfall system is used. Other aspects are the same as Example 3.

[0034] This comparative example is the same as Example 3 except that aquatic plants are not planted in each pool.

[0035] The circulating water in pool No. 1 in Example 1-3 and Comparative Example 1-3 was taken, and the water quality of the circulating water was tested under the same temperature and the same environment.

[0036] The water in Examples 1-3 is significantly clearer and cleaner than that in Comparative Examples 1-3, indicating that the water purification system used in the present invention plays a very good role in purifying water.

[0037] The pH values ​​of Examples 1-3 are 7.0, 7.1, and 7.3, which are neutral water quality. However, since Comparative Example 1 does not have a waterfall pool, Comparative Example 2 does not have a waterfall system, and Comparative Example 3 does not plant aquatic plants in the pool, the pH values ​​are 8.2, 7.8, and 8.3, respectively, which are alkaline. The values ​​of BOD5 in Examples 1-3 are 9.5 mg / L, 9.4 mg / L, and 8.9 mg / L, respectively, while those in Comparative Examples 1-3 are 15.8 mg / L, 9.4 mg / L, and 14.8 mg / L, respectively; the contents of total phosphorus in Examples 1-3 are 0.42 mg / L, 0.44 mg / L, and 0.45 mg / L, respectively, while those in Comparative Examples 1-3 are 0.75 mg / L, 0.46 mg / L, and 0.61 mg / L, respectively; the contents of total nitrogen in Examples 1-3 are 14.5 mg / L, 13.8 mg / L, respectively. / L, 12.6mg / L, while Comparative Examples 1-3 are 18.8mg / L, 14.6mg / L, 17.1mg / L; the ammonia nitrogen content of Examples 1-3 is 4.3mg / L, 4.2mg / L, 4.1mg / L, respectively, while Comparative Examples 1-3 are 7.3mg / L, 5.9mg / L, 6.8mg / L; the number of fecal coliform bacteria in Examples 1-3 is 998 / L, 953 / L, 885 / L, while Comparative Examples 1-3 are 1411 / L, 1062 / L, 1358 / L.

[0038] The BOD5, total phosphorus, total nitrogen, ammonia nitrogen, and fecal coliform group contained in Comparative Examples 1 and 3 are significantly improved compared with the embodiment, while the difference between Comparative Example 2 and the embodiment is not obvious. This is because Comparative Example 1 does not have No. 3-9 waterfall pools, and no aquatic plants are planted in the pools of Comparative Example 3. The main reason for water purification is that the roots of aquatic plants absorb heavy metals, nitrogen, phosphorus, potassium and other substances to achieve water purification. Comparative Examples 1 and 3 do not plant aquatic plants, so the effect is poor. The effect of Comparative Example 3 is improved compared with Comparative Example 1. This is because the waterfall system and gabions of Comparative Example 3 also play a certain purification role in BOD5, total phosphorus, total nitrogen, ammonia nitrogen, fecal coliform group and other substances in the water.

[0039] As for oxygen content, the oxygen content of Examples 1-3 is 7.9 mg / L, 7.8 mg / L, and 8.1 mg / L, while that of Comparative Examples 1-2 is 6.1 mg / L and 5.3 mg / L, respectively, which are significantly lower than those of the Examples. This is because the Examples purify water through a waterfall system, and the waterfall process is the process of aerating the water. The waterfall can be aerated and oxygenated through the waterfall difference, thereby increasing the oxygen content of the water. The oxygen content of Comparative Example 3 is slightly lower than that of the Examples. This is because although a waterfall system is provided, no aquatic plants are planted, and the plant roots also oxygenate the water by absorbing heavy metals, nitrogen, phosphorus, potassium and other substances.

[0040] Ornamental fish were cultured in the No. 1 pool 1 in Example 3, and only feeding and aeration were performed daily without any treatment of the pool. Figure 3 As shown, the ornamental fish in the pond grow healthily for a long time and the water quality is clear, which shows that the water purification system of the present invention can purify the water body for a long time.

Claims

1. A water purification system, comprising a first water pool (1), a second water pool (2), a third water pool (3), a fourth water pool (4), a fifth water pool (5), a sixth water pool (6), a seventh water pool (7), an eighth water pool (8), a ninth water pool (9) and a tenth water pool (10), wherein the first water pool (1) is provided with a water inlet (11), characterized in that: The No. 1 pool (1) is a source pool, the No. 2 water system (2) is a natural canal, the No. 3 pool (3) to the No. 9 pool (9) are waterfall pools, the top surfaces of the No. 1 pool to the No. 10 pool are all on the same plane as the ground, the No. 10 pool (10) is a large pool, and the heights of the No. 1 pool (1) to the No. 10 pool (10) are arranged in a gradient decreasing order, with a gradient difference of 40-50 cm. The water in the No. 1 pool (1) flows into the No. 2 water system (2), and then falls into the No. 3 pool (3) to the No. 9 pool (9) in turn for purification, and finally falls. The water enters the No. 10 water pool (10), wherein a water pump (12) is provided in the No. 10 water pool (10), wherein one end of a water outlet pipe (13) is connected to the water pump (12), and the other end of the water outlet pipe (13) is connected to the water inlet (11), and the water pump (12) pumps water through the water outlet pipe (13) and re-enters the No. 1 water pool (1) for circulation treatment; and the No. 3 water pool (3) to the No. 8 water pool (8) are all planted with aquatic plants such as reed, water plantain, calamus, lotus, water hyacinth, water nymph, duckweed, foxtail algae, hornwort, water hyacinth and water celery, or any combination thereof.

2. A water purification system according to claim 1, characterized in that: The water tank No. 1 (1) is composed of a sedimentation tank 1 (101), a sedimentation tank 2 (102) and a sedimentation tank 3 (103). A plurality of planting tanks (104) are randomly arranged in the sedimentation tank 3 (103). The arrangement heights of the sedimentation tank 1 (101), the sedimentation tank 2 (102) and the sedimentation tank 3 (103) are arranged in a gradient decreasing order. The water in the water tank No. 10 (10) is first pumped into the sedimentation tank 1 (101). The water flow of the sedimentation tank 1 (101) passes through the sedimentation tank 2 (102) and the sedimentation tank 3 (103) in turn. The sedimentation tank 3 (103) is provided with an outlet. A water outlet device (1001) is installed at the place, and the water outlet device (1001) is composed of a water trough (105) and a filter cotton (106). The edge of the water trough (105) extends out of the edge of the outlet of the first water pool (1). The filter cotton (106) is provided below the outlet of the first water pool (1). The height of the water trough (105) is higher than the filter cotton (106) and is arranged in a gradient. The water flows out through the outlet of the third sedimentation tank (103), passes through the water trough (105), falls to the filter cotton (106) for filtration, and then flows into the second water system (2).

3. A water purification system as claimed in claim 1, characterized in that: The bottom of the No. 2 water system (2) is paved with a mixture of volcanic rocks and gravel.

4. A water purification system as claimed in claim 1, characterized in that: At the entrance of the No. 3 water pool (3), four gabions are arranged in order from upstream to downstream, namely, a pebble gabion (301), a large gravel gabion (302), a volcanic rock gabion (303), and a small gravel gabion (304); a pumice gabion (305) is arranged in the central part of the No. 3 water pool (3); and at the outlet of the No. 3 water pool (3), a water outlet device (3001) is arranged, which includes a volcanic rock gabion (306), a water channel (307), and a water outlet device (3001). 7), gravel gabion one (308) and filter cotton two (309), the water trough two (307) and gravel gabion one (308) are arranged adjacently and their surfaces are on the same horizontal plane, the gravel gabion one (308) is located below the water trough two (307) and is arranged in a gradient with the water trough two (307), a layer of filter cotton two (309) is laid on the gravel gabion one (308), and the edge of the water trough two (307) extends out of the edge of the outlet of the third water pool (3).

5. A water purification system as claimed in claim 4, characterized in that: The particle size of the pebbles in the gabions is 3-5 cm, the particle size of the large gravels is 2-4 cm, the particle size of the volcanic rocks is 3-5 cm, the particle size of the small gravels is 0.5-1 cm, and the particle size of the pumice is 2-4 cm; the width of the pebble gabion 1 (301), the large gravel gabion 1 (302), the volcanic rock gabion (303), the small gravel gabion 1 (304) and the pumice gabion (305) are all the same as the width of the third pool (3 ), the water flows through the pebble gabion 1 (301), the large gravel gabion 1 (302), the volcanic rock cage (303), the small gravel gabion 1 (304) and then through the pumice gabion (305), and then through the volcanic rock cage (306) and the water trough 2 (307) at the outlet, and then falls into the filter cotton 2 (309), and then through the gravel gabion 1 (308) and flows into the fourth pool (4).

6. A water purification system as claimed in claim 1, characterized in that: A water outlet device 4 (4001) is provided at the outlet of the fourth water pool (4), and the water outlet device 4 (4001) comprises a pebble stone cage 2 (401), a gravel stone cage 2 (402), a water trough 3 (403) and a filter cotton 3 (404). The pebble stone cage 2 (401) and the water trough 3 (403) are arranged adjacent to each other and their surfaces are at the same height. The edge of the water trough 3 (403) extends out of the edge of the outlet of the fourth water pool (4). The gravel stone cage 2 (401) and the water trough 3 (403) are provided at the outlet of the fourth water pool (4). The stone cage 2 (402) is located below the water channel 3 (403) and is arranged in a gradient manner. A layer of filter cotton 3 (404) is laid on the gravel cage 2 (402). After the water flows through the pebble cage 2 (401), it passes through the water channel 3 (403) and falls onto the filter cotton 3 (404) for filtration. After passing through the gravel cage 2 (402), it flows into the fifth water pool (5). The particle size of the pebbles is 0.5-1 cm, and the particle size of the gravel is 3-5 cm.

7. A water purification system as claimed in claim 1, characterized in that: A water outlet device 5 (5001) is provided at the outlet of the No. 5 water tank (5), and the water outlet device 5 (5001) comprises a large gravel gabion 2 (501), a water trough 4 (502) and a small gravel gabion 2 (503). The large gravel gabion 2 (501) and the water trough 4 (502) are arranged adjacent to each other and their surfaces are at the same height. The small gravel gabion 2 (503) is arranged below the water trough 4 (502) in a gradient manner. The edge of the water trough 4 (502) extends out of the edge of the outlet of the No. 5 water tank (5); the small gravel gabion 2 (503) is arranged below the water trough 4 (502) in a gradient manner. The stone cage 2 (503) is paved with a filter cotton 4 (504). After the water flows through the large gravel cage 2 (501), it is injected into the water channel 4 (502) and then falls onto the filter cotton 4 (504). After passing through the small gravel cage 2 (503), it flows into the No. 6 water pool (6). The particle size of the large gravel in the large gravel cage 2 (501) is 2-3 cm, and the particle size of the small gravel in the small gravel cage 2 (503) is 0.5-1 cm. The outlet settings of the No. 6 water pool (6) to the No. 8 water pool (8) are the same as those of the No. 5 water pool (5).

8. A water purification system as claimed in claim 1, characterized in that: Shellfish are cultured in the No. 9 water pond (9).

9. A water purification system as claimed in claim 8, characterized in that: The shellfish aquatic animals are field snails and river clams.

10. A water purification system according to claim 1, characterized in that: Ecological floating beds are planted in the water pools No. 3 (3) to No. 9 (9).

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