WO2024052727A1

WO2024052727A1 - System for purification and subsurface injection of water to the plants

Info

Publication number: WO2024052727A1
Application number: PCT/IB2022/058547
Authority: WO
Inventors: Ali KAVAKPOUR; Mobina KAVAKPOUR; Sedighe KAVAKPOUR; Seyyedmohammadjavad AMINI
Original assignee: Kavakpour Ali
Priority date: 2022-09-11
Filing date: 2022-09-11
Publication date: 2024-03-14

Abstract

The invention of system and method for purification and subsurface injection of water with high solutes to the plants relates to irrigation system in agriculture using salt water, relates to the under pressure irrigation systems, salt water storage systems and water purification using evaporation and intelligent water supply to trees and plants. This device include a water tank, salt water storage cartridge, a middle door and a main door and a control system for connecting and disconnecting fresh water and also a piping system to transfer fresh water and contains a floater to control the salt water level. Also this invention has a cylindrical tank with a cone-shaped upper part, which is an inverted incomplete cone that has a steel (metal) door and has a stud-like shape on the sides and can be fixed on the container and has an edge.

Description

System for purification and subsurface injection of water to the plants

TECHNICAL FIELD OF THE INVENTION

The present invention relates to irrigation system in agriculture using salt water, including under pressure irrigation systems, salt water storage systems and water purification using evaporation and intelligent water supply to trees and plants, and also relates to subsurface irrigation methods and also relates to systems for detection of humidity and temperature for correct watering.

PRIOR ARTS

Most plants are very vulnerable to the ions created by the accumulation of metal salts in the soil. The presence of chlorine ions in soils with a high percentage of salt solutes, which is mainly due to the presence of sodium chloride or other common chlorides, on the one hand by entering to plant and combining with plant parts, and on the other hand by absorbing other useful salts inside the soil and creating chloride compounds and deactivating the useful ions in the soil as a lethal factor in the short term causes the plant to dry. Other solutes in the soil, which are more than usual, can cause serious problems.

Given to the non-uniform distribution of water resources on the surface of the earth, as well as the existence of dry belts in the northern and southern hemispheres and the existence of deserts and wilderness and low water points, the process of supplying water to plants and gardens has always been one of the leading challenges. In the meantime, humans have started the agricultural process near rivers and fresh water sources, and by increasing the population and increasing the demand for agricultural and horticultural products, cultivated lands were not able to meet the needs of the growing human society. Therefore, lands with a little distance from water resources have also been used for the agricultural process. In areas where the rainfall level is relatively higher, dry farming type of agriculture became common. With the construction of water supply routes, the transfer of water from water sources to gardens and agricultural areas generalized. In traditional irrigation, in general, the digging of canals and runnels, which in most cases do not have a suitable cover in the bottom, also caused a large amount of water sent to the lands and agricultural gardens to evaporate or leak into the ground. Further, to optimize the irrigation systems, using covered pipes and canals of water transferring, reduced the volume of lost water. With the promotion of human knowledge, the rain irrigation system as well as under pressure drip irrigation structures reduced the amount of water consumption in gardens and lands. Despite the reduction of water loss in this type of irrigation mechanisms, due to the penetration of water into the ground and the removal of moisture from the accessibility of the roots, on average less than 30% of the water used is provided to the plant. The surface evaporation around the plant and the dispersion of soil moisture and the removal of said moisture from the accessibility of the roots have always made the amount of water used for irrigation several times higher than the water used by the plant. In the meantime, the irrigation process is defined and implemented in specific intervals and periodically, depending on the soil conditions, plant type and weather conditions. Now, by decreasing the subsurface water resources, wells and aqueducts, which are used as sources for extraction of water in areas far away from surface water sources, gradually their irrigation efficiency has become less and less, so that the share of water taken from these sources no longer has the ability to meet the needs of agricultural lands and gardens, and this has caused a large part of the gardens to disappear due to lack of water. Also, water resources for creating new forests and gardens are very limited. Most of the mentioned problems mostly show themselves in the dry belts of the earth. In the parts of the earth where the air humidity is very low and there is not enough and continuous rainfall, we are currently witnessing vast deserts and wilderness.

Irrigating the plants according to the amount of salts in the water can cause various changes in the amount of ions present in the soil. If the water has a low level of salts and metal ions, as the salts in the soil are dissolved and transferred to the lower levels of the soil, the level of salt solutes in the soil decreases, however, if the water hardness is high or contains a lot of salts, the process of irrigation with water containing salty solutes can provoke the mentioned problem.

For this reason, it is generally not possible to irrigate the plants by the water with high hardness, especially if these solutes include metal salts and chloride salts.

The presence of sodium chloride and calcium chloride as residual solutes resulting from drying of open seas in most parts of the world has caused a significant increase in the level of chloride salts in the soil. The flowing water in the watercourses of such lands, which has a high level of salt solutes, causes the salts in the water to dissolve and the level of the existing salts to increase to the extent of the properties of metal salts and chloride salts in the water, also the entry of rainwater into salty lands will increase the hardness of underground water and the created salt water resources generally cannot be used for agriculture. The main problem in agriculture in desert areas or areas with low rainfall is not the lack of water, however the underground source of water can be reached, but the high hardness of water and salts in surface and underground water make it impossible to use these resources for irrigation proposes.

Desalination methods to produce water that can be used in agriculture mainly have very high costs and the efficiency of water desalination is low. Also, irrigation with the help of classical or conventional methods leads to water wastage, which happens either due to surface evaporation or water moving away from the reach of the roots by infiltrating the downstream layers.

Reverse osmosis (RO) desalination technology currently allocates the largest amount of desalination methods to itself. The presence of very salty wastewater made by this method brings its own environmental problems and in the long term the area used for water purification must tolerate more solutes and salts. Very high costs and the amount of investment and required facilities make the use of this technology uneconomical to produce agricultural products in most cases. Other methods such as boiling water and re-condensation, use of solvents and using membrane have not yet been able to success for using in agriculture on a large scale due to high energy consumption or low production and efficiency.

The production of usable water in agriculture on the one hand, and the evaporation and wastage of water due to the problems in conventional agricultural methods on the other hand, make agriculture almost impossible in hot and dry areas. Water resources with high TDS, such as sea water, surface brackish water, as well as underground water with high salt levels, have always encouraged humans to use these resources to develop agriculture and produce products using these resources. The existence of two problems of low efficiency of irrigation methods and the impossibility of using saline water for irrigation are two major dilemmas for using water with a high percentage of solutes and salts in hot and dry areas.

In this regard, the previous inventions can be divided into two categories, the first category of inventions that focus on the system of using salty water with high salts in agriculture, and the second category of inventions and efforts has been emphasized on the optimal use of available water for agriculture.

Among the discussed techniques, can mention to method provided in the invention with registration No. CN203692101U which is granted in Chinese patent office dated 2014/07/09 titled “Novel fruit tree root system drop irrigation intelligent control device” provides a novel fruit tree root system drop irrigation intelligent control device. An annular drop irrigation device surrounds a fruit tree root 20 cm underground, a humidity sensor is close to the annular drop irrigation device and is connected with a controller, a water collecting platform is arranged on the ground, a purified water storage pool is arranged under the water collecting platform and is located underground, a horizontally-arranged filter layer is arranged in the middle of the water collecting platform, an activated carbon water purification layer is arranged at the bottom of the water collecting platform, the purified water storage pool is arranged under the activated carbon water purification layer and is located underground, a solenoid valve is arranged at the bottom of the purified water storage pool, the annular drop irrigation device is connected with the solenoid valve through a water conveying pipe, and the controller is connected with the solenoid valve. The novel fruit tree root system drop irrigation intelligent control device achieves underground irrigation, the soil structure cannot be damaged, automatic detection and timely water supplementation and injection are achieved. A patent application with publication No. WO2018099536A2 which is filed in WIPO dated 2017/02/21 titled “Irrigating trees by injectors near roots” relates to a cylindrical injector for the trees irrigator laid under the surface of the soil with depth 10 cm to 100 cm near the roots of the trees to deliver the water to the roots of the trees directly by injection and filtration without passing of water on the surface of the soil, wherein said cylindrical injector prevents the vegetation, reduces the salinity and protect itself from entering of the roots in it and could be maintained without digging the soil, in this invention Water and pressure reach the injector through a flexible plastic hose. Because the injector is tightly closed, and when the soil doesn't absorb all the water in the injector, water level rises in the injector to cover all the holes around it. The pressure of the water grid will force water to seep out of the injector to the soil, and then to the roots of the tree. Therefore no hygrometer sensor is used in this invention.

Another Chinese patent with publication No.CN102763587A which is filed dated 2012/08/14 titled “Plant root water injection irrigation system” relates to a plant root water injection irrigation system comprising a water supply device and water control valve connected with the water supply device, a main irrigation pipeline connected with the water control valve and paved on the soil and a group of irrigation branch pipelines connected with the main irrigation pipeline. Water injection needles are respectively arranged on the group of irrigation branch pipelines, and the water injection needles are inserted in soil of the roots of plants. Water is injected in the plants through the water injection needles inserted at the positions of the roots of the plants, and the water injection needles are connected to form an irrigation network, and a water-saving efficient irrigation technique is achieved. Soluble fertilizer can be blended in the device in an irrigation process so as to achieve irrigation and fertilizing integration. The plant root water injection irrigation system is high in automation, simple to use, convenient to manage, capable of being reused and favorable for water and fertilizer absorption of the plants through an irrigation method for injecting water and fertilizing at the roots of the plants directly.

A Chinese patent with publication No. CN105191757A which is filed dated 2015/10/27 titled “Buried type water-saving fruit tree irrigation device” provides a buried type water-saving fruit tree irrigation device which comprises a water source and a water pump. A water inlet pipe is arranged between the water pump and the water source 1. A water conveying hose is arranged on one side of the water pump. An annular water conveying pipe is arranged at one end of the water conveying hose. A plurality of water conveying branch pipes are evenly arranged at the bottom of the annular water conveying pipe. A plurality of water outlets are formed in the pipe walls of the water conveying branch pipes. A humidity monitoring rod is arranged on one side of the water conveying branch pipes. A temperature monitoring rod is arranged at one end of the top of the annular water conveying pipe. An irrigation analysis module is arranged on a shell of the water pump. The temperature monitoring rod and the humidity monitoring rod are both electrically connected to the irrigation analysis module. Due to the buried type design, water can be well absorbed by root systems of fruit trees, water is less evaporated, and the water resource utilization rate is increased; due to the humidity monitoring rod, soil moisture can be monitored, irrigation is conducted when moisture is not enough

Another Chinese patent with registration No. CN105794597B which is granted dated 2019/02/01 titled “ It is a kind of that layering constant-pressure infiltration irrigation system and method are carried out according to root system of plant distribution” provides a kind of irrigation field and atumation saving the agricultural water comprising filter screen, supervisor, water pump, non-retum valve, regulating valve, Development of Venturi Fertilizer Applicator, cascade filter, well strainer, Flowmeter, pressure sensor, fertilizer spreading tank, main pipe, solenoid valve, Infiltrating irrigation pipe, humidity sensor, humidity sensors, humidity sensors, mulch, exhaust valve, controller, frequency converter, when pressure sensor detects the pressure in supervisor lower than setting value When, it opens frequency converter, increases pressure It when detecting that pressure is higher than setting value, opens frequency converter, reduces pressure, when No. 2 humidity sensors detect that soil moisture changes, No. 1 solenoid valve is close, When No. 3 When humidity sensor detects that soil moisture is higher than setting value, No. 2 solenoid valves are close, Step 5, after No. 1 solenoid valve and No. 2 solenoid valves are turned off, infiltrating irrigation terminates, and switch off the pump, keeps control device processed is opened, and next infiltrating irrigation period is waited.

A Chinese patent with publication No. CN111165214A which is filed dated 2020/02/17 titled “Plant irrigation and temperature control system” provides a planting irrigation and temperature control system, which comprises a concave groove, wherein a heat insulation layer is arranged on the inner wall of the concave groove; a partition plate is arranged in the concave groove, and a water passing channel is formed between the partition plate and the bottom wall of the concave groove; a soil sandstone layer for planting crops is paved on the clapboard. According to the invention, the water passing channel is formed between the concave groove and the partition plate and between the partition plate and the bottom wall of the concave groove, and when irrigation is not needed, the water passing channel below the partition plate provides air required by growth for the roots of crops; when irrigation is needed, a water source is conveyed into the water passage, and water can permeate upwards for irrigation; when the soil temperature needs to be regulated, heated water can be input into the water passing channel through a pipeline, the water temperature is reduced and does not act with the soil by utilizing the hydrothermal heating partition plate and the soil, and then the water flows out through the water passing channel; when rainwater exists, the rainwater can penetrate through the soil and flow into the water passing channel through the partition plate, and the rainwater flows out through the water passing channel to prevent water logging.

Another Chinese patent with publication No. CN111650859A which is filed dated 2020/05/27 titled “Garden maintenance system” discloses a garden maintenance system which comprises a central processing control device, a soil humidity sensing device, a soil nutrient sensing device, an air temperature and humidity sensing device, a drainage device, a monitoring device, a water and fertilizer integrated device, a cleaning device and a pesticide spraying device. The soil humidity sensing device is connected with a first input end of the central processing control device, the soil nutrient sensing device is connected with a second input end of the central processing control device, the air temperature and humidity sensing device is connected with a third input end of the central processing control device, and the monitoring device is connected with a fourth input end of the central processing control device.

And another Chinese patent with publication No. CN112655347A which is filed dated 2021/01/20 titled “Method and system for controlling growth environment of root system of soil culture” discloses a method and a system for controlling the growth environment of a root system of a soil culture, wherein a circulating water infiltrating irrigation system is constructed by a circulating pump, a water supply pipe, a water return pipe, a circulating underground infiltrating irrigation pipe and a water supplementing and constant pressure device. The circulating underground infiltrating irrigation pipe is provided with a water outlet and is embedded in the soil of the plant planting area; after the circulating pump is started, the irrigation water is pushed to circularly flow in the circulating pump, the water supply pipe, the circularly buried infiltrating irrigation pipe and the water return pipe; and the irrigation water seeps out through the water outlet hole under the action of the pressure of the infiltrating irrigation water in the circulating underground infiltrating irrigation pipe and permeates and diffuses to the soil on the periphery of the circulating underground infiltrating irrigation pipe.

Another Chinese patent with registration No. CN201084955Y which is granted dated 2008/07/16 titled “Pouring irrigation machine” provides a pouring irrigation apparatus, which belongs to an appliance used for the irrigation and fertilization of fruit tree, plant and other appliances. The pouring irrigation apparatus has an annular water distributing pipe connected with a water inlet pipe, a plurality of water diversion pipes are communicated at the lower end the annular water distributing pipe, soil drilling and water injecting devices are installed at the lower ends of the water diversion pipes. When the pouring irrigation apparatus is used, underground irrigation water is injected the soil of the plant root, therefore the moisture evaporation on the earth surface is reduced, and soil aggregate structure can be prevented from being damaged, the soil can not be hardened. There is the ability to move the drip irrigation device and it is easy to carry, and timely watering of fruit trees and other plants can be done at any moment.

In another Chinese patent with registration No. CN205030289U which is granted dated 2016/02/17 titled “Automatic irrigation system of trees water conservation” discloses an automatic irrigation system of trees water conservation, automatic irrigation system of trees water conservation, it is constituted including the storage water tank, the outlet and the defeated water piping connection in underground of storage water tank, the underground raceway with bury at the regional water piping connection that oozes of root, the underground raceway passes through the solenoid valve with the infiltration pipe and is connected, has buried the soil moisture sensor underground at root of tree, soil moisture sensor and transmission bus connection, the transmission bus inserts microcontroller, microcontroller can control solenoid the switch, the infiltration pipe is circular the setting around the root.

Another Chinese patent with registration No. CN211532209U which is granted dated 2020/09/22 titled “Wisdom gardens management system” provides a smart garden management system, which comprises a climate recognition detection device, a weather information recognition device and a control device, wherein the climate recognition detection device is arranged in a garden and used for recognizing climate information; the intelligent terminal controller is connected with the output ends of the climate recognition detection device and the environmental information acquisition device and generates a control command based on the climate information and the environmental information. The garden irrigation execution device is connected with the output end of the intelligent terminal controller and executes irrigation operation based on the control command; and the power supply device is used for supplying power to the climate identification detection device, the environmental information acquisition device and the garden irrigation execution device.

Also the Chinese patent with registration No. CN106613769B which is granted dated 2020/03/24 titled “Sponge urban underground buried pipe irrigation system and construction method thereof’ a spongy urban underground buried pipe irrigation system and its manufacturing method have been presented. This method includes the following steps: hidden piping, construction of a flow distribution box, construction of a storage box, construction of a seepage pipe, and performance testing of an irrigation system. This method has simple steps and can effectively achieve the purpose of rainwater recycling for underground irrigation in a way that there is a sponge inside the chamber placed under the soil that stores rainwater and saves water from storage and it is used for underground irrigation of plants.

And another Chinese patent with publication No. CN111587716A which is filed dated 2019/02/20 titled “Automatic soil humidity control system and application thereof in underground irrigation, space farms, desert field building and the like” relates to a process technology and a device of an automatic soil humidity control system. An underground irrigation system comprising a plurality of in-soil water pressure detectors, a plurality of bi-directional flow conduits, each connected to a set of a plurality of in-soil water pressure probes, a bidirectional flow water pipe connected to the plurality of bidirectional flow ducts, a water source water pressure control groove connected to the bidirectional flow water pipe, a buffer tank, the input and output pipes of which are connected with the water source hydraulic pressure control tank, a water purifier connected to the water source hydraulic pressure control tank, a water collection tank, which is connected to the water purifier, a plurality of drain pipes having holes are buried under a deep root zone of soil in a crop area, and a drain pipe having a first end connected to the plurality of hole-containing drain pipes and a second end connected to the water collection tank.

According to the founded article in https://www.groasis.com/en/ can observe that a device named Waterboxx which is brainchild of a Dutch businessman, Peter Hoff, is used for irrigation in environments with low rainfall, with temperature more than 40 degrees of centigrade and even it is suitable for using in eroded and stony soils. This device is made of polypropylene (plastic) and therefore it can be used 10 times. The tree needs a box of 9 to 12 months to grow. When the tree no longer needs the Waterboxx, the box can be carefully removed from the tree and reused.

Also another article related to subsurface irrigation is founded in https://www.gcsaa.org/uploadedfiles/Course/Golf-Course Features/Bunkers/Water- from-underground.pdf according to which a method and system provided for underground irrigation in slope fields and to prevent loosing water. Based on the method mentioned in this article temporary network was set up on top of the sand in a shelter connected to a quick-connect valve. After the implementation, small wet areas protruded from the tubular droppers and continued to extend in diameter until finally the wet areas merged together. The network is dotted with paint using 12" to 18" lateral spacing. In this method, a gap is created in the form of a V, and the pipe is inserted at the appropriate depth and connected to the water source.

Another method of subsurface irrigation is the OLLA system or irrigation with jug. In this method, by pouring water into the unglazed clay jugs and locating under the ground near the plant root, it causes the moisture that exudes from the jug to the soil to provide the necessary water of the plant. A part of this jug or clay container is placed outside the surface of the earth, which can provide the required water through the hole in its head. The images related to this method can be seen through the below link: https://www. interest.com/ in/872713234016987220/7mt~login.

Also the Japenese patent with publication No. JP2007532109A which is filed dated 2004/04/09 titled “Suspension plant growth platform and method for growing terrestrial plants in multi-purpose salt water” provides a method according to which terrestrial plants are cultivated in brackish water or seawater. Supports the growth of terrestrial plants floating on the surface of various salinity water bodies, including 100% seawater in the marine environment, using a lightweight floating growth medium package (FGMP) or, as an alternative, a thin sheet of suitable material to do. A floating seawater cultivation platform (FSCP) can be formed by interconnecting FGMP units and housing them in a floating rigid or flexible framework. Using this method, plants were able to grow and thrive in a sustainable manner on FSCP floating on 100% seawater surface. A cricket (Hamizumina), a halophyte, can regenerate its shoots and roots in seawater. Thus, this discovery will allow us to do marine agriculture, i.e. farming at sea. FSCP can be used for a wide range of purposes, from environmental protection to landscape maintenance and crop production.

In another Chinese invention with registration No. CN102273373B which is granted dated 2012/12/26 titled “Method for building flower beds and planting flowers and plants in heavy saline-alkali land in arid region” discloses a method for building flower beds and planting flowers and plants in a heavy saline-alkali land in an arid region and relates to the technical fields of soil transformation methods and green lawn planting. The method for building flower beds and planting flowers and plants in the heavy saline-alkali land in the arid region comprises 18 steps and has various advantages of desalting rapidly, achieving long-acting and durable effect, saving water and cost, completely eliminating weeds, promoting growth of ornamental plants and the like.

And another Chinese patent with publication No. CN103917086A which is filed dated 2011/10/03 titled “Means and methods for growing plants in high salinity or brackish water” provides a method of growing plants in high salinity is hereby presented. The method comprises steps of obtaining a pressurized cultivation system (PCS) having a pressure vessel for growing at least one plant on a media or substrate, the pressure vessel housing at least the roots of said at least one plant, a source of saline water and a high pneumatic pressure production unit operatively connected to said pressure vessel for providing higher than ambient pressure to said pressure vessel, thereby maintaining said roots of said at least one plant under high pressure during growth, planting a plant in the pressure vessel such that at least a portion of said roots are hermetically sealed within said pressure vessel, providing saline or brackish water to said media and pressurizing said vessel.

DESCRIPTION OF THE INVENTION

The present invention is a supplementation of the invention No. PCT/IB2022/057349.

In this invention, by adding new elements to the previous device, it is possible to use salt water in the device and create fresh water for irrigating the plants. The device presented in the invention PCT/IB 2022/057349 includes a tank in the form of a combination of an incomplete cone and a cylinder, which is placed on the side of the plant and in the ground near it, the presence of double doors prevents from entering soil and other foreign objects. In addition, connecting two or more pipes to the bottom of the tank makes it possible to transfer water to the roots of the plant if necessary. Since the water in the tank is controlled by a thermostatic sensor and when the temperature of the soil increases due to the decrease in humidity, the sensor and the control system are activated and inject the required amount of water into the soil, it can be considered that with the increase of soil moisture due to the addition of water through the perforated pipes installed next to the roots, the management of water consumption inside the tank and the control of the flow of water entering the soil is done completely based on the designed pattern. Connecting the tank to the main water flow and having a floater system ensures that always the necessary water exists inside the tank and by reducing soil moisture and by considering the initial settings, the water needed by the plant is always available for it. The valve at the entrance of each pipe is responsible for controlling and connecting and disconnecting the water flow in time, and in this way, providing water to the roots of the plant and, in general, water consumption in the mentioned device is always under control and with the minimum possible amount.

In the present invention, which is a supplementation of the mentioned device, the components of the device include a cylindrical tank with a cone-shaped upper part, which is an inverted incomplete cone (figurel numberl) that has a steel (metal) door (figurel number 2) and has a stud-like shape on the sides and can be fixed on the container (figure 24). The edges of the mentioned side have a circular crosssection and are designed as a rabbet joint with a container door (figure 25 number 2). Between the door and the edge of the container, the presence of a circular sealing (gasket) minimizes the possibility of leaving the moisture from container (figure 2 number 3). The presence of a lockable belt in the two doors of the container provides the possibility of fixing the door to the container (figure 2 number 1).

The door of the container can be made of metal or polymer. If metal is used for the door of the container, the efficiency of water desalination can be increased. In the lower part of the first door, a second door (figure 2 number 4) is installed which has a convex shape and has an upward convexity. The mentioned door is made of steel material so that it can show more resistance against moisture and also better transfer of temperature in it. The mentioned door is perforated at the sides so that the condensate can enter from upper part of the container to the lower part of it. In the center of the tank and on its bottom, there is a protuberant ring that is placed between the water outlets which can prevent the accumulation of water in the center of the container (figure 3 number 2). A second container that has a cylindrical shape (figure 8) is designed in such a way that it enters or exits the tank like a cartridge. The lower part of the mentioned container has a ring that its dimensions are designed in such way to enter the ring of bottom of tank and fixed with second container in the tank. This ring is also used as a stair to keep the bottom of the second container up. The height of the second container is such that it has a small distance with the inner door of the device and does not stick to it. From the central part of the main door, a pipe equipped with a floater enters the tank (figure 26 number 1) which is completely sealed at the place of connection to the upper door prevent from escaping any moisture.

Adjusting the level of water inside the second container is done with the help of this floater. By placing the tank under the ground and near the plant, water transfer pipes are inserted around the roots. The best time to use the mentioned device is at the same time as planting the plant. The flow of the water containing high solutes which is usually harmful to plants and causes them to dry, is connected to the equipment through a pipeline and is pumped into the tank with the help of a salt water pump and is placed inside the middle container which is removable from the tank.

The floater is designed in such a way that by raising the level of salt water in the cartridge, it cuts off the water flow and does not allow the water in the middle container to rise and overflow. During the day, as the air temperature increases and the door of the container heats up and the temperature of the door is transferred into the tank, the surface evaporation rate of the water in the middle container increases and the evaporation continues until the saturation limit is reached. Due to connection of the tank wall to the soil, the temperature of the tank wall is always lower than the temperature of the outside air and with the saturation of the steam inside the tank and reaching the maximum relative humidity, the water particles change from vapor phase to the liquid phase on the tank wall and they slip and roll down from the wall section. The process of evaporation and then condensation can always continue until the tank is filled and fresh water is placed between the tank wall and the middle container. As the water level in the existing space rises, the empty surface of the tank wall will decrease, and the temperature of the water between the two walls will also decrease. This problem cause the process to lose its speed when the tank filled with the fresh water, and the higher the height of water inside the fresh water storage tank, the rate of evaporation and condensation will decrease. With the presence of fresh water inside the tank and between the tank wall and middle container, if necessary and with decrease in humidity of the soil due to the activation of the tank control valve (figure 17), fresh water enters the perforated tubes around the roots and seep out of them. By seeping the water, the soil around the root became humid and the plant receives the amount of water that it needs from the said moisture.

By evaporation of the water in the middle container, the water level in the salt water container is lowered and the floater allows the water to enter the container from the transfer line. Always the salt water will exist inside the middle container and fresh water will exist around it. If a control system equipped with a pressure switch is used, the salt water transfer pump will be disabled and shut off when the floater valve is closed and the pressure increases inside the transfer line. Only in the conditions that the salt water lower down in the middle container to the extent that the floater allows the salt water to enter, the salt water transfer pump starts and proceed to transfer the salt water. By passing the time and by continuously producing the fresh water through the device, the remaining sediments from the solutes in the water accumulate in the bottom part of the middle container. After the time passed and at least half of the volume of the middle container is filled, by opening the tank door, the mentioned container can be brought out and a substitute container can be inserted in to the tank. The deposits in the container are discharged to a suitable place and the cartridge container is again ready to be inserted in the tank and this process will be repeated. If the resulting deposits are valuable, they are transported in dried form. At the time of changing the cartridges, the remaining salt water in each cartridge can be collected and used by passing through a manual filter. In case of using this device for large plants that need more water, the required water can be supplied by increasing the number of tanks around a plant or by increasing the size of the tanks.

If there is a network with the same devices, by connecting all these devices to a salt water transmission system, the feeding of network can be completed.

The prior invention, which the present invention is an extension of it can be described as follows. Indeed considering that the original invention was submitted to the World Intellectual Property Organization during another case, this invention does not make any claims on the following content, and it is only given objectively to better clarify the issue. In the initial invention a tank with a circular cross section is designed in such a way that the downstream part of the tank is cylindrical in shape and has the ability to hold a certain volume of water. The upper part of the tank is designed as an inverted incomplete cone. In the bottom of the tank, there are 4 holes with equal distances at the vertex of a square. In the lower part of the tank body, holes are extended in the form of hollow tubes. In the upper part of the tank and close to the tank door, a middle door is installed in such a way that it has a bit upward convexity. The said door has 2 holes, one of which is for the water transfer connections and the other is created as a pressure correction valve inside the tank. The mentioned door separates the upper part of the tank from the lower part. The connections of the door to the tank are installed in such a way that when the middle door is inserted into the tank, the presence of a peripheral ring causes the middle door to be fixed and locked in the tank. The conical shape of the upper part makes the said tank not tends to sink and settle in the soil due to its weight inside the place of installation. By placing the middle door and due to the upward convexity of the door, if water enters the tank, the existing water will tend to move to the periphery and enter the tank through the mounted hole. The circularity of the tank and the door cause to be no difference in its performance by placing the middle door in the tank in every manner.

In the upper part of the tank, there is a circular door in a concave shape, which is completely fixed with a raised ring outside the container, which prevents the entry of dirt, waste and foreign objects into the container. The concavity of the mentioned door causes rainwater to accumulate in its center during rain and enters the container through the mounted hole, and after collapsing on the middle door, it enters the main tank. On the said door, there is a place for entering the branch of the water transfer pipe. In the lower part of the tank, two series of flexible tubes are connected to the outlets of the tank in such a way that on one side the beginning of the tube and on the other side the end of the tube are connected to the tank after going through a complete loop. The present tubes are placed horizontally around the plant in a way that forms two concentric circles. The first circle has a smaller diameter and the second circle has a larger diameter. In each of the loops, there is a thermostatic system based on increasing the length of a copper wire with a polymer coating which is kept in a protective pod, which makes it possible to increase the length of the wire in its pod in a way that due to its long length, very small changes in temperature can increase its length by a few millimeters. At the beginning of the mentioned pod is designed in such a way that before assembling the water transfer tubes can be entered to the tank from one side and fixed with a plastic bead from inside the tank. In this way, the outer pod is fixed to the base of the tank and the changes in the length of the wire comparing with its pod can be obvious in the other part of the pod. Existence of an adjustment screw which has the same head as the wire make it possible at the beginning of the thermostatic wire pod that by opening and closing the screw, control the placement of the other end of the wire. At the other end of the wire there is a connection system which is installed to the lower hole of the tank in such a way that if the length increase due to the heat, the wire apply pressure to a valve and by opening and closing the valve allow the water to flow from inside the tank in to the tube. Given that the alloy used in thermostatic wire can be made of other corrosion-resistant and elastic metals, if necessary these alloys can be used instead of coated copper metal. In order to make the tank water flow in each of the loops, other types of thermal sensors, electric valves equipped with electric sensors or other equipment for switching the flow on and off based on measuring the temperature can be used, and the present invention is not limited to the aforementioned thermostatic sensor.

DESCRIPTION OF THE DRAWINGS

Figure 1 is an overview of the device which includes the following:

1- Tank body

2- Tank door

3- Transfer pipes Figure 2 is the explosive design of the device, which includes the following:

1- Tank door locking ring

2- Upper door gasket

3- Upper door 4- Inner door

5- Floater

6- Salt water storage container

7- Cap of the water transfer valve system

8- Water transfer valve 9- The main tank

10- Perforated water transfer pipes on the inlet side

11- Perforated water transfer pipes on the capped side

12- Thermostatic sensor adjustment system

13- The adjustment screw of the thermostatic system 14- The fixing nut of the pipe inlet section

Figure 3 is the view of the tank includes the following:

1- The edge of the tank door

2- The internal ring of the tank

3- Bottom of tank 4- Water outlet

5- Conduit of connecting the end of the transfer pipe

Figure 4 is the cut view of the location of the valve and the thermostatic sensor adjustment system.

Figure 5 is the upper door.

Figure 6 is the side view of the upper door.

Figure 7 is the inner door.

Figure 8 is the salt water storage container.

Figure 9 is the basis of the thermostatic sensor adjustment system.

Figure 10 is a cut view of the thermostatic sensor adjustment system.

Figure 11 is the adjustment screw.

Figure 12 is a cut view of the adjustment screw.

Figure 13 is the upper door.

Figure 14 is the side view of the upper door.

Figure 15 is the locking ring of the upper door.

Figure 16 is the water inlet cap of the bottom valve of the tank along with the hosing.

Figure 17 is the set of water inlet valve.

Figurel8 is the hosing of the valve.

Figure 19 is a cut view of the hosing of the valve. Figure 20 is the valve.

Figure 21 is the side view of the valve.

Figure 22 is the cap of the valve system.

Figure 23 is the side view of the cap of valve system. Figure 24 is placement of the tank door.

Figure 25 is the manner of connection of the door to the tank.

Figure 26 is set of floater and base.

Figure 27 is the explosive design of the set of floater.

Figure 28 is base of floater. Figure 29 is bubble of floater.

Figure 30 is network of equipments.

Figure 31 is a cut view of the tank with floater.

Claims

What is Claimed is:

1. The invention of system and method for purification and subsurface injection of water with high solutes to the plants includes at least a water tank and at least one salt water storage cartridge and at least one middle door and one main door and at least one control system for connecting and disconnecting fresh water and at least a piping system to transfer fresh water and at least one floater to control the salt water level.

2. The irrigation and purification method of claim one which includes a tank in the form of combination of an incomplete cone and a cylinder.

3. The irrigation and purification method of claim one which is placed on the side of the plant and at a distance near to it under the ground.

4. The irrigation and purification method of claim one which he presence of double doors prevents from entering soil and other foreign particles.

5. The irrigation and purification method of claim one which connecting the tank to the main water flow and having a floater system ensures that there is always the necessary water inside the tank.

6. The irrigation and purification method of claim one which has a steel (metal) door which said door has a stud-like shape on the sides and can be fixed on the container.

7. The irrigation and purification method of claim one that the edges of the mentioned container have a circular cross section and are designed as rabbet joint with a container door.

8. The irrigation and purification method of claim one which the existence of a circular sealing (gasket) between the door of the container and the edge of it minimizes the possibility of leaving the moisture from the container. The irrigation and purification method of claim one which by evaporation of the water inside the middle container and condensation of it on the wall of main container, the fresh water to use for plants provided. The irrigation and purification method of claim one which after several consecutive evaporation periods, the remaining solutes in the bottom of the container can be discharged by removing the cartridge. The irrigation and purification method of claim one which the speed of the fresh water production process is reduced by increasing the height of the fresh water in the tank. The irrigation and purification method of claim one which can be installed as a network of similar equipment next to each other and irrigate several trees or plants in the forest or lands.