Revetment type water treatment unit and ecological water treatment system

Abstract

The utility model discloses a revetment type water treatment unit and an ecological water treatment system, the revetment type water treatment unit is arranged at a designated position on the bank side of a target water body, and the revetment type water treatment unit comprises a circulating water tank which is communicated with the top of each first water purification tank and allows external water to enter each first water purification tank; the plurality of first water purification tanks are used for accommodating multiple layers of water purification gravels and can filter and purify water, and effluent of the first water purification tanks is conveyed to a target water body; wherein the types of the water purification gravels in all the layers are different. According to the utility model, the sewage system type purification treatment can be realized, the water quality is guaranteed, the purification efficiency is improved, the system combination is flexible, the applicability is strong, and the system can be integrated into the use environment and beautifies the use environment while the water quality is purified.

Description

Technical Field

[0001] The utility model relates to the field of environmental protection water treatment, in particular to a revetment type water treatment unit and an ecological water treatment system with the revetment type water treatment unit. Background Art

[0002] Eutrophication refers to the water pollution phenomenon caused by excessive content of nutrients such as N and P in the water body.

[0003] In the prior art, the principles of ecological engineering are used to treat eutrophic water bodies to degrade COD, nitrogen and phosphorus in water. That is, the principles of ecological engineering are used to take aquatic plants as the main body, apply the principles of soilless cultivation technology, use polymer materials as carriers and matrices, apply the symbiotic relationship between species, and make full use of the spatial niche and nutritional niche of the water body, so as to establish an efficient artificial ecosystem to reduce the pollution load in the water body.

[0004] For example, the Chinese patent: Irrigation Planting System, application number CN201520997281.2, provides an irrigation planting system, including a water storage tank, a water pump, the irrigation planting system also includes a water storage container and a planting container arranged on the water storage container, the planting container is provided with a water inlet hole, the water storage container is provided with a drainage hole; the drainage hole is connected to the water inlet of the water storage tank, the water inlet is connected to the water outlet of the water pump, and the water inlet of the water pump is connected to the water outlet of the water storage tank. However, the purification capacity of this solution is limited, especially for large-area water bodies, and there is still room for improvement. Utility Model Content

[0005] A series of simplified concepts are introduced in the utility model content section, which are all simplifications of the prior art in the field, which will be further described in detail in the specific implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and necessary technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0006] The technical problem to be solved by the utility model is to provide a revetment type water treatment unit which can fully purify eutrophic water bodies, beautify the environment and reduce manufacturing costs, and save the space occupied by the purification system.

[0007] And, an ecological water treatment system that can fully purify eutrophic water bodies, is particularly suitable for large-area water bodies, beautifies the environment while reducing manufacturing costs and saving space occupied by the purification system.

[0008] In order to solve the above technical problems, the utility model provides a revetment water treatment unit, which is arranged at a designated position on the shore of a target water body, and the revetment water treatment unit comprises:

[0009] A circulating water tank connected to the top of each first water purification tank to supply external water to each first water purification tank; the external water may be water treated by other water purification systems, water from sewage treatment equipment, rainwater, etc.;

[0010] A plurality of first water purification tanks, which are used to contain multiple layers of water purification sand and gravel, which can filter and purify water, and the water output is transported to the target water body;

[0011] Among them, the types of water purification sand and gravel in each layer are different.

[0012] Preferably, the revetment type water treatment unit is further improved, further comprising:

[0013] The first aquatic plant planting water purification layer is arranged in the circulating water tank, which can cultivate aquatic plants and filter and purify water quality at the same time; the first aquatic plant planting water purification layer can be made of coarse sand; or, a multi-layer water purification sand and gravel structure composed of at least one layer of coarse sand can provide filtering function while cultivating aquatic plants;

[0014] The first aquatic plant is planted in a first aquatic plant planting water purification layer.

[0015] Preferably, the revetment type water treatment unit is further improved, wherein the first aquatic plant includes at least one water-purifying aquatic plant, that is, includes at least one existing plant known to have the ability to purify eutrophic water bodies, and optionally also includes other plants that do not have the ability to purify eutrophic water bodies, such as landscape aquatic plants; the specific types and quantities can be selected according to the size of the circulating water tank.

[0016] Preferably, the revetment-type water treatment unit is further improved, wherein the designated location is in a wall on the shore of the target water body, that is, the revetment-type water treatment unit is installed in a wall on the shore of the target water body;

[0017] Or, a designated pre-buried position or pre-installed position on the shore of the target water body, that is, pre-buried on the shore of the target water body, or pre-installed on the side wall of the wall on the shore of the target water body close to the center of the target water body.

[0018] Preferably, the revetment-type water treatment unit is further improved, wherein the first water purification tank comprises:

[0019] A tank body, which is used to contain multiple layers of water purification sand and gravel;

[0020] Among them, the types of water purification sand and gravel in each layer are different.

[0021] Preferably, the revetment type water treatment unit is further improved, and the multi-layer water purification gravel in the tank body includes from top to bottom: coarse sand, melon seed stone and expanded clay.

[0022] Preferably, the revetment type water treatment unit is further improved, further comprising:

[0023] A first delivery pipeline, which is connected to the water outlets of the first water purification tanks, for the water outlets of the first water purification tanks to be gathered and delivered to the target water body;

[0024] The first boosting device is arranged at the water outlet of the first delivery pipeline.

[0025] Preferably, the installation position of the revetment type water treatment unit is higher than the target water body, and the filtered water is delivered to the target water body by gravity. When the installation conditions currently limit the installation position of the revetment type water treatment unit to be higher than the target water body, the filtered water of the revetment type water treatment unit can be delivered to any desired location by setting a first delivery pipeline and a first booster device.

[0026] In order to solve the above technical problems, the utility model provides an ecological water treatment system having any one of the above-mentioned revetment-type water treatment units, wherein the target water body can independently form self-circulating filtration.

[0027] Preferably, the ecological water treatment system is further improved, and the target water body includes:

[0028] A water reservoir, which is used to receive the effluent of the revetment-type water treatment unit and / or external water; the external water may be clean water treated by other water purification systems, effluent of sewage treatment equipment, rainwater, etc.;

[0029] The second aquatic plant planting water purification layer is laid at the bottom of the reservoir, which can cultivate aquatic plants while filtering and purifying water quality; the second aquatic plant planting water purification layer can be made of coarse sand; or, a multi-layer water purification sand and gravel structure composed of at least one layer of coarse sand can provide filtering function while cultivating aquatic plants;

[0030] A plurality of second water purification tanks are buried at the bottom of the water reservoir, and the upper part thereof is covered with a second aquatic plant planting water purification layer, which is used to accommodate multiple layers of water purification sand and gravel, and the water output thereof is transported back to the water reservoir to form a self-circulating filtration;

[0031] The second aquatic plant is planted in the second aquatic plant planting water purification layer.

[0032] Preferably, the ecological water treatment system is further improved, wherein the second aquatic plants include at least one water-purifying aquatic plant, that is, include at least one existing plant known to have the ability to purify eutrophic water bodies, and optionally also include other plants that do not have the ability to purify eutrophic water bodies, such as landscape aquatic plants; the specific types and quantities may be the same as or different from the first aquatic plants.

[0033] Preferably, the ecological water treatment system is further improved, wherein the second water purification tank comprises:

[0034] The second tank is used to contain multiple layers of water purification sand and gravel;

[0035] Among them, the types of water purification sand and gravel in each layer are different.

[0036] Preferably, the diameter of the second water purification tank is larger than that of the first water purification tank. It should be noted that the larger the diameter of the second water purification tank, the greater the filtering capacity, but the manufacturing cost will be relatively higher. In order to save costs, other water purification systems can be selected to use replacement tank-shaped equipment to lay water purification sand and gravel.

[0037] Preferably, the ecological water treatment system is further improved, and the multi-layer water purification gravel in the second tank body includes: coarse sand, melon seed stone and ceramsite from top to bottom. The number and type of water purification gravel laid in the second water purification tank can be the same as or different from the first water purification pipe.

[0038] Preferably, the ecological water treatment system is further improved to include:

[0039] A delivery pipeline, which is connected to the water outlets of the second water purification tanks, and collects the water outlets of the second water purification tanks and inputs them into the regulating tank;

[0040] The first booster device pumps clean water into the reservoir according to the water level of the regulating tank.

[0041] The ecological water treatment system of the utility model does not achieve an ideal self-circulating filtration effect by relying solely on the water from the second water purification tank flowing back to the water reservoir. By adding a first boosting device, the water from the second water purification tank can be collected and input into the regulating tank, thereby forming a water level difference and a pumping pressure difference, thereby improving the self-circulating efficiency of the target water body.

[0042] Preferably, the ecological water treatment system is further improved to include:

[0043] A second booster device, which pumps clean water into the landscape according to the water level of the regulating pool;

[0044] The landscape is arranged in the reservoir and is used to provide a water level difference to transport clean water back to the reservoir.

[0045] The water level difference provided by the landscape can increase the oxygen content of the reservoir by causing the water to flow back to the reservoir, and can also crush particulate matter by causing the water to flow back to the reservoir.

[0046] Preferably, the ecological water treatment system is further improved, and the landscape includes: a plurality of fountain structures and / or a rockery with a waterfall flow channel.

[0047] Preferably, the ecological water treatment system is further improved, and the fountain structure includes:

[0048] The fountain barrel is inverted and buried at the bottom of the water reservoir, which can prevent sand and gravel from entering the barrel. The side wall near the mouth of the fountain barrel is formed with multiple water holes. The fountain pipe passes through the bottom of the fountain barrel and extends out of the liquid surface of the water reservoir;

[0049] The second booster device is arranged at the mouth of the fountain barrel and draws water into the fountain pipe.

[0050] The working principle of the revetment type water treatment unit provided by the utility model is as follows: after the external water enters the circulating water tank, it enters a plurality of first water purification tanks arranged below the circulating water tank. The water purified by the first water purification tank flows into the target water body by gravity, or can be collected through the delivery pipeline and delivered to the target water body through the booster device;

[0051] It should be noted that, in the case where the target water body has a wall, a revetment-type water treatment unit may be installed in the wall;

[0052] When the target water body has no enclosure, it can be pre-buried at the bank of the target water body, or pre-installed on the side wall of the enclosure at the bank of the target water body close to the center of the target water body.

[0053] In a preferred embodiment of the revetment type water treatment unit of the utility model, a first aquatic plant planting and water purification layer is laid in the circulating water tank, which provides filtering and purification functions while planting and nurturing aquatic plants with water purification capabilities.

[0054] Based on the above working principle, the revetment type water treatment unit provided by the utility model can at least achieve the following technical effects:

[0055] 1. External water flows through the first water purification tank, which can achieve systematic purification of eutrophic water, ensure water quality and improve purification efficiency.

[0056] 2. The first water purification tank of the utility model can be recycled by using the glass fiber reinforced plastic tank on the waste water purifier, turning waste into treasure and reducing costs.

[0057] 3. The first water purification tank of the utility model can be set in the wall of the target water body. The equipment is concealedly installed and does not occupy space, which is conducive to improving the system integration.

[0058] 4. In the preferred solution of the utility model, the external water flows through the first aquatic plant, the first aquatic plant planting water purification layer and the first water purification tank. The water purification equipment (the first aquatic plant planting water purification layer and the first water purification tank) and the aquatic plants are used in combination to form a multi-channel filtration, so the water purification capacity requirements for the aquatic plants are reduced. Therefore, in addition to planting aquatic plants with water purification capabilities in the circulating water tank of the revetment-type water treatment unit of the utility model, landscape plants can also be planted to beautify the water purification pool. While achieving water purification, the utility model can be integrated into the use environment and beautify the use environment.

[0059] The working principle of the ecological water treatment system provided by the utility model:

[0060] After the effluent from the revetment-type water treatment unit enters the water reservoir, the water in the water reservoir is filtered through the second aquatic plant, the second aquatic plant planting water purification layer and the second water purification tank and then flows into the regulating tank (which can be achieved through water level difference and / or boosting equipment); when the water level in the regulating tank is too high, the water in the regulating tank can be pumped into the water reservoir through the boosting equipment (water pump), causing a water level difference, and then the water in the reservoir will flow into the regulating tank again, and the cycle will continue, and the target water body will form a self-circulating filtration. When the water level in the regulating tank is too low, the effluent collected from the second water purification tank can be pumped into the regulating tank through the pressure difference provided by the boosting equipment (water pump), and the cycle will continue, and the target water body will form a self-circulating filtration.

[0061] In a preferred embodiment of the ecological water treatment system of the utility model, landscape objects (such as rockery waterfalls and fountains) are added to the water reservoir to form a water level difference through a booster device. After the water in the reservoir is pumped to the landscape objects, the water flow agitation in the process of flowing back to the reservoir can increase the oxygen content of the reservoir, which is convenient for breeding ornamental fish in the reservoir. Particulate matter can also be crushed by the water flow agitation when flowing back to the reservoir.

[0062] Based on the above working principle, the ecological water treatment system provided by the utility model can at least achieve the following technical effects:

[0063] 1. External water flows through at least the first water purification tank, the second aquatic plant, the second aquatic plant planting water purification layer and the second water purification tank, which can achieve systematic purification treatment of eutrophic water bodies, ensure water quality and improve purification efficiency.

[0064] 2. The first water purification tank and the second water purification tank of the utility model can be recycled by using the glass fiber reinforced plastic tanks on the waste water purifiers, turning waste into treasure and reducing costs.

[0065] 3. The first water purification tank of the utility model can be set in the wall of the target water body, and the second water purification tank of the utility model can be buried at the bottom of the reservoir. The equipment is concealedly installed and does not occupy space, which is conducive to improving system integration.

[0066] 4. In the preferred solution of the utility model, the external water flows through the first aquatic plant, the first aquatic plant planting water purification layer, the first water purification tank, the second aquatic plant, the second aquatic plant planting water purification layer and the second water purification tank. The water purification equipment (the first aquatic plant planting water purification layer, the first water purification tank, the second aquatic plant planting water purification layer and the second water purification tank) is used in combination with aquatic plants to form a multi-channel filtration, so the water purification capacity requirements for aquatic plants are reduced. Therefore, in addition to planting aquatic plants with water purification capabilities in the circulating water tank and the water reservoir of the utility model ecological water treatment system, landscape plants can also be planted to beautify the water purification pool. While purifying the water quality, the utility model can be integrated into the use environment and beautify the use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] The drawings of the present utility model are intended to illustrate the general characteristics of the methods, structures and / or materials used in specific exemplary embodiments of the present utility model, and to supplement the description in the specification. However, the drawings of the present utility model are schematic diagrams not drawn to scale, and thus may not accurately reflect the precise structure or performance characteristics of any given embodiment. The drawings of the present utility model should not be interpreted as limiting or restricting the range of values ​​or properties covered by the exemplary embodiments of the present utility model. The present utility model is further described in detail below in conjunction with the drawings and specific embodiments:

[0068] Figure 1 It is a schematic diagram of a preferred embodiment of the revetment type water treatment unit of the utility model.

[0069] Figure 2 It is a schematic structural diagram of a preferred embodiment of the first water purification tank of the utility model.

[0070] Figure 3 It is a schematic diagram of the principle of the ecological water treatment system of the utility model.

[0071] Figure 4 It is a partial schematic diagram of the ecological water treatment system of the utility model.

[0072] Figure 5 It is a schematic diagram of a preferred embodiment of the fountain structure of the utility model.

[0073] Description of Reference Numerals

[0074] Target water body 1

[0075] Circulating water tank 2

[0076] First water tank 3

[0077] Tank 4

[0078] Coarse sand 5

[0079] Melon Seed Stone 6

[0080] Ceramic 7

[0081] Reservoir 8

[0082] Second aquatic plant planting water purification layer 9

[0083] Second purified water tank 10

[0084] Second Aquatic Plant 11

[0085] Delivery pipeline 12

[0086] Regulating tank 13

[0087] The first supercharging device 14

[0088] Second sub-boosting device 15

[0089] Fountain structure 16

[0090] Second sub-boosting device 2 17

[0091] Rockery 18

[0092] Fountain Bucket 19

[0093] Water hole 20

[0094] Fountain pipe 21. DETAILED DESCRIPTION

[0095] The following is an explanation of the implementation of the utility model by specific specific embodiments, and those skilled in the art can fully understand the other advantages and technical effects of the utility model from the content disclosed in this specification. The utility model can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the general design concept of the utility model. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the utility model can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described here. It should be understood that these embodiments are provided to make the disclosure of the utility model thorough and complete, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "coupled" to another element, the element can be directly connected or coupled to another element, or there can be an intermediate element. The difference is that when an element is referred to as "directly connected" or "directly coupled" to another element, there is no intermediate element. In all the drawings, the same reference numerals always represent the same element. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0096] First embodiment;

[0097] refer to Figure 1 As shown, the utility model provides a revetment type water treatment unit, which is arranged at a designated position on the shore of a target water body 1, and the designated position is a wall on the shore of the target water body; or, a pre-buried position or pre-installed position designated on the shore of the target water body. In this embodiment, the target water body 1 has a wall, and the revetment type water treatment unit is installed in the wall of the target water body 1, and the revetment type water treatment unit includes:

[0098] A circulating water tank 2, which is connected to the top of each first clean water tank 3, so that external water can enter each first clean water tank 3;

[0099] A plurality of first water purification tanks 3, which are used to contain multiple layers of water purification sand and gravel, which can filter and purify water, and the effluent is transported to the target water body;

[0100] Among them, the types of water purification sand and gravel in each layer are different.

[0101] refer to Figure 2 As shown, the utility model provides a preferred embodiment of the first water purification tank, wherein the first water purification tank comprises:

[0102] The multi-layer water purification gravel in the tank body 4 includes: coarse sand 5, melon seed stone 6 and ceramsite 7 from top to bottom.

[0103] Second embodiment;

[0104] The utility model provides a revetment type water treatment unit, which is a further improvement on the basis of the above first embodiment, and the same parts are not repeated here, and further includes:

[0105] The first aquatic plant planting water purification layer is arranged in the circulating water tank, which can cultivate aquatic plants and filter and purify water quality at the same time; the first aquatic plant planting water purification layer can be selected from at least one layer of coarse sand;

[0106] The first aquatic plants are planted in a first aquatic plant planting water purification layer, wherein the first aquatic plants include at least one water purification aquatic plant.

[0107] Third embodiment;

[0108] The utility model provides an ecological water treatment system having a revetment type water treatment unit as described in any one of the first embodiment or the second embodiment, wherein the target water body can independently form a self-circulating filtration, referring to Figure 3 and Figure 4 As shown, the preferred target water body includes:

[0109] A water reservoir 8, which is used to receive the water from the revetment type water treatment unit and / or external water;

[0110] The second aquatic plant planting water purification layer 9 is laid at the bottom of the reservoir 8 and can cultivate aquatic plants while filtering and purifying water quality;

[0111] A plurality of second water purification tanks 10 are buried at the bottom of the water reservoir 8, and the upper part thereof is covered with a second water purification layer 9 for planting aquatic plants, which is used to accommodate multiple layers of water purification sand and gravel, and the water output is transported back to the water reservoir; the water output of the second water purification tank 10 can slowly permeate back to the water reservoir 8, or can be collected through pipelines and then pumped back to the water reservoir 8 by a water pump; a regulating water tank 13 is provided in this embodiment;

[0112] The delivery pipeline 12 is connected to the water outlets of the second water purification tanks 10, and collects the water outlets of the second water purification tanks 10 and inputs them into the regulating tank 13;

[0113] A first booster device 14, which pumps clean water into the water storage tank 8 according to the water level of the regulating tank 13;

[0114] The second aquatic plants 11 are planted in the second aquatic plant planting water purification layer 9, and the second aquatic plants include at least one water purification aquatic plant.

[0115] refer to Figure 2 As shown, the utility model provides a preferred embodiment of a second water purification tank. The second water purification tank has the same structure as the first water purification tank but different sizes. The second water purification tank is buried at the bottom of the water reservoir 8 so the size can be selected to be very large, including: the second water purification tank includes: the multi-layer water purification sand and gravel in the second tank body include: coarse sand, melon seed stone and expanded clay from top to bottom.

[0116] Fourth embodiment;

[0117] The utility model provides an ecological water treatment system, which is a further improvement on the third embodiment above, and the same parts are not repeated here, and further includes:

[0118] The second boosting device pumps clean water into the landscape according to the water level of the regulating tank 13; according to the water level of the regulating tank 13, an electrical signal can be triggered by a liquid level sensor to the boosting device (water pump), triggering the boosting device (water pump) to work or stop;

[0119] The landscape is arranged in the reservoir and is used to provide a water level difference to transport clean water back to the reservoir.

[0120] In this embodiment, the arrangement of the second boosting device and the landscape object provides the following three working conditions:

[0121] The first working condition:

[0122] The second sub-boosting device 15 pumps clean water into the fountain structure 16 according to the water level of the regulating pool;

[0123] A plurality of fountain structures 16 are arranged between the second tanks, and the clean water thereof is sprayed into the water reservoir 8 .

[0124] The second working condition:

[0125] The second sub-boosting device 2 17 pumps clean water up to the rockery 18 and sends it into the waterfall flow channel according to the water level of the regulating tank 8;

[0126] The rockery 18 is arranged in the water reservoir 8 and forms a waterfall flow channel, and clean water flows into the water reservoir 8 along the waterfall flow channel.

[0127] The third working condition:

[0128] The second sub-boosting device 15 pumps clean water into the fountain structure 16 according to the water level of the regulating pool;

[0129] A plurality of fountain structures 16 are arranged between the second tanks, and the clean water thereof is sprayed into the water reservoir 8;

[0130] The second sub-boosting device 2 17 pumps clean water up to the rockery 18 and sends it into the waterfall flow channel according to the water level of the regulating tank 8;

[0131] The rockery 18 is arranged in the water reservoir 8 and forms a waterfall flow channel, and clean water flows into the water reservoir 8 along the waterfall flow channel.

[0132] For the preferred embodiment of the fountain structure 16, refer to Figure 5 As shown, including:

[0133] The fountain barrel 19 is inverted and buried at the bottom of the water reservoir (the barrel mouth is downward and the barrel bottom is upward), which can prevent sand and gravel from entering the barrel. The side wall near the fountain barrel mouth is formed with multiple water holes 20, and the fountain pipe 21 passes through the bottom of the fountain barrel 19 and extends out of the liquid surface of the water reservoir 8;

[0134] The second sub-boosting device 17 is arranged at the bottom of the fountain barrel 19 and pumps water into the fountain pipe 21.

[0135] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. It will also be understood that, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant field, and not interpreted in an ideal or overly formal sense.

[0136] The present invention is described in detail above through specific implementation methods and examples, but these do not constitute limitations of the present invention. Without departing from the principle of the present invention, those skilled in the art may make many modifications and improvements, which should also be considered as the protection scope of the present invention.

Claims

1. A revetment type water treatment unit, characterized in that: It is arranged at a designated location on the shore of the target water body. The revetment water treatment unit includes: A circulating water tank connected to the top of each first clean water tank to supply external water to each first clean water tank; A plurality of first water purification tanks, which are used to contain multiple layers of water purification sand and gravel, which can filter and purify water, and the water output is transported to the target water body; Among them, the types of water purification sand and gravel in each layer are different.

2. The revetment type water treatment unit according to claim 1, characterized in that: Also includes: The first aquatic plant planting water purification layer is arranged in the circulating water tank, which can cultivate aquatic plants and filter and purify water quality at the same time; The first aquatic plant is planted in a first aquatic plant planting water purification layer.

3. The revetment type water treatment unit according to claim 2, characterized in that: The first aquatic plant includes at least one water-purifying aquatic plant.

4. The revetment type water treatment unit according to claim 1, characterized in that: The designated location is a wall on the shore of the target water body; Or, a designated pre-buried position or pre-installed position on the shore of the target water body.

5. The revetment type water treatment unit according to claim 1, characterized in that: The multiple layers of water purification gravel in the tank include: coarse sand, melon seed stone and expanded clay from top to bottom.

6. An ecological water treatment system having a revetment type water treatment unit according to any one of claims 1 to 5, characterized in that: The target water body can independently form self-circulating filtration.

7. The ecological water treatment system according to claim 6, characterized in that: The target water bodies include: A water reservoir, which is used to receive the effluent of the revetment-type water treatment unit and / or external water; The second aquatic plant planting water purification layer is laid at the bottom of the reservoir and can cultivate aquatic plants while filtering and purifying water quality; A plurality of second water purification tanks, which are buried at the bottom of the water reservoir, and the upper part of which is covered with a second water purification layer planted with aquatic plants, and which are used to accommodate multiple layers of water purification sand and gravel, and the water output from the second water purification tank is transported back to the water reservoir; The second aquatic plant is planted in the second aquatic plant planting water purification layer.

8. The ecological water treatment system according to claim 7, characterized in that: The second aquatic plant includes at least one water-purifying aquatic plant.

9. The ecological water treatment system according to claim 7, characterized in that: The second water purification tank comprises: The second tank is used to contain multiple layers of water purification sand and gravel; Among them, the types of water purification sand and gravel in each layer are different.

10. The ecological water treatment system according to claim 9, characterized in that: The multi-layer water purification gravel in the second tank body includes from top to bottom: coarse sand, melon seed stone and expanded clay.

11. The ecological water treatment system according to claim 9, characterized in that: Also includes: A delivery pipeline, which is connected to the water outlets of the second water purification tanks, and collects the water outlets of the second water purification tanks and inputs them into the regulating tank; The first booster device pumps clean water into the reservoir according to the water level of the regulating tank.

12. The ecological water treatment system according to claim 11, characterized in that: Also includes: A second booster device, which pumps clean water into the landscape according to the water level of the regulating pool; The landscape is arranged in the reservoir and is used to provide a water level difference to transport clean water back to the reservoir.

13. The ecological water treatment system according to claim 12, characterized in that: The landscape object includes: a plurality of fountain structures and / or a rockery with a waterfall flow channel.

14. The ecological water treatment system according to claim 13, characterized in that: The fountain structure comprises: The fountain barrel is inverted and buried at the bottom of the water reservoir, which can prevent sand and gravel from entering the barrel. The side wall near the mouth of the fountain barrel is formed with multiple water holes. The fountain pipe passes through the bottom of the fountain barrel and extends out of the liquid surface of the water reservoir; The second booster device is arranged at the mouth of the fountain barrel and draws water into the fountain pipe.

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