AU2021102251A4 - Soil Salt-Leaching Device and Method - Google Patents
Soil Salt-Leaching Device and Method Download PDFInfo
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- AU2021102251A4 AU2021102251A4 AU2021102251A AU2021102251A AU2021102251A4 AU 2021102251 A4 AU2021102251 A4 AU 2021102251A4 AU 2021102251 A AU2021102251 A AU 2021102251A AU 2021102251 A AU2021102251 A AU 2021102251A AU 2021102251 A4 AU2021102251 A4 AU 2021102251A4
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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Abstract
OF THE DISCLOSURE
The present disclosure relates to a soil salt-leaching device and a method. The device comprises
water retaining assemblies, a drainage board and vacuum pumping systems, wherein the water
retaining assemblies are enclosed to form an area to be salt-leached; the drainage board is paved at
the bottom of the area to be salt-leached and makes contact with soil, and a hollowed-out structure is
formed in the drainage board so that drainage can be facilitated; and pumping ports of the vacuum
pumping systems communicate with the drainage board through drainage pipelines. The vacuum
technology is applied to the salt-leaching process, and according to the characteristics of high salt
content, high viscosity, poor water permeability and air permeability, low organic matter content and
the like of soil, fluffy nutrient materials are added into the soil firstly, the upper layer of the soil is
covered with fresh water, then water in the soil is pumped out in a vacuum mode, and soluble salt in
the soil is leached out through continuous supplementation of the fresh water.
(Figure 1)
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Description
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[01] The present disclosure relates to the technical field of soil improvement, in particular to a soil salt-leaching device and a method.
[02] Saline-alkali soil is a general term of saline soil and alkaline soil. Saline soil mainly refers to salinized soil with high chloride or sulfate content, and the soil is alkaline, but the pH value is not necessarily very high. Alkaline soil refers to soil containing carbonate or heavy phosphate, the pH value is high, the soil is alkaline, the organic matter content of saline-alkali soil is low, the soil fertility is low, the physicochemical property is poor, many negative ions and positive ions harmful to crops exist, the crops are not prone to promoting seedling, and plants in severe saline-alkali soil areas hardly survive. Due to the facts that the cultivated land area in China is small, the demand for saline-alkali soil greening soil is large, and crop planting cannot be achieved through marine high-salt-content sludge soil, so that rapid salt leaching of the high-salt soil and improvement of the saline-alkali soil and the marine high-salt-content sludge soil become the problems urgently needing to be solved by technicians in the field.
[03] Aiming at the defects in the prior art, the present disclosure aims to provide a soil salt-leaching device and a method, so that rapid salt leaching of high-salt soil is realized, saline-alkali soil and marine high-salt-content sludge soil are improved, and the planting area of plants is enlarged.
[04] To achieve the purpose, the present disclosure provides the following technical scheme:
[05] A soil salt-leaching device comprises:
[06] water retaining assemblies enclosed to form an area to be salt-leached;
[07] a drainage board which is paved at the bottom of the area to be salt-leached and makes contact with soil, wherein a hollowed-out structure is formed in the drainage board so that drainage can be facilitated; and
[08] vacuum pumping systems, pumping ports of which communicate with the drainage board through drainage pipelines.
[09] Further, there are a plurality of groups of vacuum pumping systems, the groups of vacuum pumping systems are arranged in the circumferential direction of the area to be salt-leached at intervals and communicate with the drainage board through the drainage pipelines respectively.
[10] Further, each water retaining assembly comprises a water retaining cofferdam arranged above the ground and a clay core wall arranged below the ground.
[11] Further, the water retaining cofferdams and the clay core walls are all of trapezoid structures, and the long side of each water retaining cofferdam is connected with the long side of the corresponding clay core wall.
[121 Further, the drainage board is detachably and fixedly connected with the drainage pipelines through board-pipe connectors.
[13] Further, each board-pipe connector comprises:
[14] an annular part, which sleeves the exterior of the corresponding drainage pipeline and hoops the corresponding drainage pipeline; and
[151 connecting arms, which are positioned at the opening end of the corresponding annular part and fixedly connected with the drainage board through connecting pieces.
[16] Further, there are two connecting arms, one of the two connecting arms is formed by extending the opening end on one side of the corresponding annular part, and the other connecting arm is formed by extending the opening end on the other side of the corresponding annular part.
[171 Further, each connecting piece comprises pin bolts, and the pin bolts pass through the connecting arm on one side, the drainage board and the connecting arm on the other side in sequence and are fastened.
[18] Further, each connecting piece further comprises tooth-type fasteners arranged between the connecting arms and the drainage board.
[19] The present disclosure also provides a method based on the soil salt-leaching device, comprising the following steps:
[20] premixing fluffy nutrient substances into saline-alkali soil in an area to be salt-leached so that the soil texture of the saline-alkali soil is loosened, and performing air closing treatment on the periphery of the vacuumizing range of the area to be salt-leached;
[21] arranging clay core walls and water retaining cofferdams around the area to be salt-leached;
[22] burying a drainage board at the bottom of the area to be salt-leached, forming a drainage network through a pumping pipeline, and communicating drainage pipelines with vacuum pumping systems;
[23] pouring sealing water to the area to be salt-leached, and meanwhile starting the vacuum pumping systems to continuously vacuumize the area to be salt-leached and drain water; and
[24] monitoring the salinity, the pH value and the vacuum degree of a preset collection point in the area to be salt-leached, judging that any index of the salinity, the pH value and the vacuum degree does not reach a preset value, and repeating the steps in sequence.
[25] The technical scheme provided by the present disclosure has the beneficial effects that, according to the soil salt-leaching device and the method provided by the present disclosure, the vacuum technology is applied to the salt-leaching process, and according to the characteristics of high salt content, high viscosity, poor water permeability and air permeability, low organic matter content and the like of soil, fluffy nutrient materials are added into the soil firstly, the upper layer of the soil is covered with fresh water, then water in the soil is pumped out in a vacuum mode, and soluble salt in the soil is leached out through continuous supplementation of the fresh water; and the improvement of soil permeability and the forced water absorption capacity of vacuum are utilized, so that the salt content of the soil can be reduced to a required level in a shorter time. The device has the advantages of rapidness, energy conservation and soil fertility improvement, so that the saline-alkali soil is rapidly and efficiently improved, the planting requirements of agriculture, greening and the like are met, land destruction and soil sampling are avoided, cultivated land is protected, marine dredged sludge waste soil is changed into planting and greening soil through resource utilization of waste, and the environmental protection requirement is met.
[261 The additional aspects and advantages of the present disclosure will be set forth partially in the following description, and will be apparent from the following description, or learned through the practice of the present disclosure.
[27] The attached figures serve to provide further understanding of the present disclosure and constitute a part of the specification, together with embodiments of the present disclosure, serve to explain the present disclosure and do not constitute limitation of the present disclosure. In the attached figures,
[28] FIG.1 is a structural schematic diagram of a specific implementation mode of a soil salt-leaching device provided by the present disclosure;
[291 FIG. 2 is a front view of the soil salt-leaching device as shown in FIG. 1;
[30] FIG. 3 is a structural schematic diagram of a water retaining assembly in the soil salt-leaching device as shown in FIG. 1;
[31] FIG 4 is a structural schematic diagram of a board-pipe connector in the soil salt-leaching device as shown in FIG. 1; and
[32] FIG. 5 is a section view in A-A direction in FIG. 4.
[33] Reference signs in drawings:
[34] 1, water retaining assembly; 11, water retaining cofferdam; 12, clay core wall; 2, drainage board; 3, vacuum pumping system;
[35] 4, board-pipe connector; 41, annular part; 42, connecting arm; 43, pin bolt; 44, tooth-type fastener;
[361 and 5, drainage pipeline.
[37] In combination with the embodiment of the present disclosure, the technical scheme in the present disclosure is described clearly and completely. The following embodiment serves only to more clearly illustrate the technical scheme of the present disclosure, and therefore, as an example only and cannot limit the scope of protection of the present disclosure in this way. The experimental methods in the following embodiment, if not specified, are conventional methods. The experimental materials used in the following embodiment, without special explanation, are all purchased from conventional reagent stores. Quantitative experiments in the following embodiment are all set to be three repeated experiments, and data are the mean or mean ? standard deviation of the three repeated experiments.
[381 Referring to FIG. 1 and FIG. 2, FIG.1 is a structural schematic diagram of a specific implementation mode of a soil salt-leaching device provided by the present disclosure; and FIG. 2 is a front view of the soil salt-leaching device as shown in FIG. 1.
[39] In a specific implementation mode, the soil salt-leaching device provided by the present disclosure comprises water retaining assemblies 1, a drainage board 2 and vacuum pumping systems 3, wherein, the water retaining assemblies 1 are enclosed to form an area to be salt-leached, the area to be salt-leached is an experimental area, the area of the experimental area can be determined according to soil conditions, for example, the area of the experimental area can be 20000 square meters, and the experimental area is divided into a first area and a second area. The drainage board 2 is paved at the bottom of the area to be salt-leached and makes contact with soil, a hollowed-out structure is formed in the drainage board 2 so that drainage can be facilitated. The drainage board 2 can be in a fence board form, and the width of a fence can be set according to actual conditions. Pumping ports of the vacuum pumping systems 3 communicate with the drainage board 2 through drainage pipelines, and the vacuum pumping systems 3 are started to pump out water in soil, so that a salt-leaching cycle is completed.
[401 In actual construction, the area to be salt-leached is generally large in range, and in order to improve the work efficiency, there are a plurality of groups of vacuum pumping systems 3, the groups of vacuum pumping systems 3 are arranged in the circumferential direction of the area to be salt-leached at intervals and communicate with the drainage board 2 through the drainage pipelines 5 respectively.
[41] Specifically, in order to improve the water retaining capacity, as shown in FIG. 3, each water retaining assembly 1 comprises a water retaining cofferdam 11 arranged above the ground and a clay core wall 12 arranged below the ground; and the water retaining cofferdams 11 and the clay core walls 12 are all of trapezoid structures, and the long side of each water retaining cofferdam 11 is connected with the long side of the corresponding clay core wall 12.
[42] In order to improve the connection reliability between the drainage board 2 and the drainage pipelines 5, the drainage board 2 is detachably and fixedly connected with the drainage pipelines 5 through board-pipe connectors 4. In the working process, due to the fact that the drainage board 2, the drainage pipelines 5 and the board-pipe connectors 4 are all located in a running water erosion environment and are all quick-wear parts, a detachable installation mode is adopted, when one of the drainage board 2, the drainage pipelines 5 and the board-pipe connectors 4 are damaged, the part can be independently replaced, and therefore the maintenance cost of equipment is reduced.
[43] Specifically, as shown in FIG. 4 and FIG. 5, each board-pipe connector 4 comprises an annular part 41 and connecting arms 42, each annular part 41 sleeves the exterior of the corresponding drainage pipeline 5 and hoops the corresponding drainage pipeline 5 so as to guarantee reliable fixation of the corresponding drainage pipeline 5. The connecting arms 42 are positioned at the opening end of the corresponding annular part 41 and fixedly connected with the drainage board 2 through connecting pieces; and an opening part is compressed through the connecting arms 42, so that the drainage pipelines 5 are further enclasped, meanwhile, the drainage board 2 is fixed through the connecting pieces, and then the drainage pipelines 5 and the drainage board 2 are tightly connected and matched.
[44] There are two connecting arms 42, one of the two connecting ans 42 is formed by extending the opening end on one side of the corresponding annular part 41, and the other connecting arm 42 is formed by extending the opening end on the other side of the corresponding annular part 41. That is, the connecting arms 42 and the corresponding annular part 41 can be of an integrally formed structure, so that the structural strength of the board-pipe connectors 4 is guaranteed, and the connecting positions of the connecting arms 42 and the corresponding annularpart 41 are prevented from being broken.
[45] In order to improve the connection reliability between the connecting arms 42 and the drainage board 2, each connecting piece comprises pin bolts 43, and the pin bolts 43 pass through the connecting ann 42 on one side, the drainage board 2 and the connecting arm 42 on the other side in sequence and are fastened; and each connecting piece further comprises tooth-type fasteners 44 arranged between the connecting arms 42 and the drainage board 2.
[46] In the specific implementation mode, according to the soil salt-leaching device provided by the present disclosure, the vacuum technology is applied to the salt-leaching process, and according to the characteristics of high salt content, high viscosity, poor water permeability and air permeability, low organic matter content and the like of soil, fluffy nutrient materials are added into the soil firstly, the upper layer of the soil is covered with fresh water, then water in the soil is pumped out in a vacuum mode, and soluble salt in the soil is leached out through continuous supplementation of the fresh water; and the improvement of soil permeability and the forced water absorption capacity of vacuum are utilized, so that the salt content of the soil can be reduced to a required level in a shorter time. The device has the advantages of rapidness, energy conservation and soil fertility improvement, so that the saline-alkali soil is rapidly and efficiently improved, the planting requirements of agriculture, greening and the like are met, land destruction and soil sampling are avoided, cultivated land is protected, marine dredged sludge waste soil is changed into planting and greening soil through resource utilization of waste, and the environmental protection requirement is met. 1471 Besides the soil salt-leaching device, the present disclosure also provides a method based on the device, and the method comprises the following steps:
[48] Sl, remixing fluffy nutrient substances into saline-alkali soil in an area to be salt-leached so that the soil texture of the saline-alkali soil is loosened, and performing air closing treatment on the periphery of the vacuumizing range of the area to be salt-leached; wherein, specifically, the fluffy nutrient substances can be mixed substances of corn straw and the like, such as mixed powder consisting of 29-32 parts of crushed corn straw, 20-28 parts of crushed cotton straw, 5-10 parts of turfy soil, 5-8 parts of plant ash and 5-8 parts of zeolite powder; and through a soil swelling agent provided by the present disclosure, the soil structure is improved through the fluffy nutrient substances, and the soil air permeability is improved.
[491 S2, arranging clay core walls and water retaining cofferdams around the area to be salt-leached, wherein the clay core walls are anti-seepage bodies, made of clay earth material, in the middle of earth and rockfill dams; the clay core walls are commonly constructed by clay, loam and other materials, the permeability coefficient is required to be only smaller than 1/1000 of the permeability coefficient of a dam shell material and not larger than 10<-5> cm/s, the thickness depends on the permissible permeability slope of soil and is about 1/8-1/4 of an acting water head and not smaller than 3 m, over-thickness is not beneficial to stability and construction, and over-thinness is not beneficial to crack prevention and earthquake resistance; the side slopes on the two sides of the thin core wall are 0.15-0.3, and the friction core wall can reach 0.4-0.5. The top of the core wall is 0.3-0.6 m higher than a designed flood level and not lower than a check water level, and a gravel protection layer needs to be arranged on the top face of the core wall; If the foundation is bedrock, a concrete slab or a concrete tooth wall needs to be arranged at the bottom of the core wall to avoid concentrated leakage; and the core wall is made of gravelly clay, so that the compressibility is reduced, and the deformation is relatively coordinated with the dam shell.
[501 S3, burying a drainage board at the bottom of the area to be salt-leached, forming a drainage network through a pumping pipeline, and communicating drainage pipelines with vacuum pumping systems;
[51] S4, pouring sealing water to the area to be salt-leached, and meanwhile starting the vacuum pumping systems to continuously vacuumize the area to be salt-leached and drain water; and
[52] S5, monitoring the salinity, the pH value and the vacuum degree of a preset collection point in the area to be salt-leached, judging that any index of the salinity, the pH value and the vacuum degree does not reach a preset value, and repeating the steps in sequence.
[53] In the specific implementation mode, according to the soil salt-leaching device provided by the present disclosure, the vacuum technology is applied to the salt-leaching process, and according to the characteristics of high salt content, high viscosity, poor water permeability and air permeability, low organic matter content and the like of soil, fluffy nutrient materials are added into the soil firstly, the upper layer of the soil is covered with fresh water, then water in the soil is pumped out in a vacuum mode, and soluble salt in the soil is leached out through continuous supplementation of the fresh water; and the improvement of soil permeability and the forced water absorption capacity of vacuum are utilized, so that the salt content of the soil can be reduced to a required level in a shorter time. The device has the advantages of rapidness, energy conservation and soil fertility improvement, so that the saline-alkali soil is rapidly and efficiently improved, the planting requirements of agriculture, greening and the like are met, land destruction and soil sampling are avoided, cultivated land is protected, marine dredged sludge waste soil is changed into planting and greening soil through resource utilization of waste, and the environmental protection requirement is met, so that the PH value of the soil can be quickly decreased between 6.5 and 7.5, and soil salt-leaching optimization is realized.
154] The additional aspects and advantages of the present disclosure will be set forth partially in the following description, and will be apparent from the following description, or learned through the practice of the present disclosure.
[55] It is noted that technical or scientific terms used herein are to be taken in ordinary meanings as understood by one of those skilled in the art to which the present disclosure pertains unless otherwise indicated. The relative steps, numerical expressions and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise. In all examples shown and described herein, any particular value should be construed as merely exemplary and not by way of limitation, unless otherwise specified, and thus, other examples of exemplary embodiments may have different values.
[56] In the description of the present disclosure, the terms "first" and "second" are merely intended for a purpose, and shall not be understood as an indication or implication of relative importance or implicit indication of the number of indicated technical features. Therefore, a feature limited by "first" or "second" may include one or more features explicitly or implicitly. In the description of the present disclosure, the meaning of "a plurality of' means two or more unless expressly specifically defined otherwise.
[57] Finally, it should be noted that the foregoing embodiments are merely intended for describing the technical schemes of the present disclosure, but not for limiting the present disclosure. Although the present disclosure is described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that they may still make modifications to the technical schemes described in the foregoing embodiments or make equivalent replacements to some or all technical features thereof, without departing from the scope of the technical solutions of the embodiments of the present disclosure, which are all contained in the scope of protection of the present disclosure.
Claims (5)
1. A soil salt-leaching device, comprising: water retaining assemblies (1) enclosed to form an area to be salt-leached; a drainage board (2) which is paved at the bottom of the area to be salt-leached and makes contact with soil, wherein a hollowed-out structure is formed in the drainage board (2) so that drainage can be facilitated; and vacuum pumping systems (3), pumping ports of which (3) communicate with the drainage board (2) through drainage pipelines.
2. The soil salt-leaching device according to claim 1, wherein there are a plurality of groups of vacuum pumping systems (3), the groups of vacuum pumping systems (3) are arranged in the circumferential direction of the area to be salt-leached at intervals and communicate with the drainage board (2) through the drainage pipelines (5) respectively.
3. The soil salt-leaching device according to claim 1, wherein each water retaining assembly (1) comprises a water retaining cofferdam (11) arranged above the ground and a clay core wall (12) arranged below the ground; wherein the water retaining cofferdams (11) and the clay core walls (12) are all of trapezoid structures, and the long side of each water retaining cofferdam (11) is connected with the long side of the corresponding clay-core wall (12).
4. The soil salt-leaching device according to claim 1, wherein the drainage board (2) is detachably and fixedly connected with the drainage pipelines (5) through board-pipe connectors (4); wherein each board-pipe connector (4) comprises: an annular part (41), which (41) sleeves the exterior of the corresponding drainage pipeline (5) and hoops the corresponding drainage pipeline (5); and connecting arms (42), which are positioned at the opening end of the corresponding annular part (41) and fixedly connected with the drainage board (2) through connecting pieces; wherein there are two connecting arms (42), one of the two connecting arms (42) is formed by extending the opening end on one side of the corresponding annular part (41), and the other connecting arm (42) is formed by extending the opening end on the other side of the corresponding annular part (41); wherein each connecting piece comprises pin bolts (43), and the pin bolts (43) pass through the connecting arm (42) on one side, the drainage board (2) and the connecting arm (42) on the other side in sequence and are fastened; or, wherein each connecting piece further comprises tooth-type fasteners (44) arranged between the connecting arms (42) and the drainage board (2).
5. A method based on any one of claims 1 to 4, comprising the following steps: premixing fluffy nutrient substances into saline-alkali soil in an area to be salt-leached so that the soil texture of the saline-alkali soil is loosened, and performing air closing treatment on the periphery of the vacuumizing range of the area to be salt-leached; arranging clay core walls and water retaining cofferdams around the area to be salt-leached; burying a drainage board at the bottom of the area to be salt-leached, forming a drainage network through a pumping pipeline, and communicating drainage pipelines with vacuum pumping systems; pouring sealing water to the area to be salt-leached, and meanwhile starting the vacuum pumping systems to continuously vacuumize the area to be salt-leached and drain water; and monitoring the salinity, the pH value and the vacuum degree of a preset collection point in the area to be salt-leached, judging that any index of the salinity, the pH value and the vacuum degree does not reach a preset value, and repeating the steps in sequence.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011027068.0 | 2020-09-25 | ||
| CN202011027068.0A CN112207123B (en) | 2020-09-25 | 2020-09-25 | Soil salt washing device and method |
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| AU2021102251A4 true AU2021102251A4 (en) | 2021-08-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101787691B (en) * | 2010-03-04 | 2011-04-27 | 张志铁 | Vacuum electrodynamics composite reinforced soil repairing method |
| CN203167543U (en) * | 2013-04-20 | 2013-09-04 | 夏江宝 | Salt elimination pipe component of saline-alkali soil |
| CN104115586B (en) * | 2014-06-13 | 2015-12-09 | 宁波高新区围海工程技术开发有限公司 | Heavy salinized ground administering method in one |
| CN104255108B (en) * | 2014-10-22 | 2015-09-02 | 湖北天蓝地绿生态科技股份有限公司 | Inferior soil terre verte vegetation ecological reconstructing system |
| CN105274981B (en) * | 2015-03-30 | 2017-06-09 | 盐城工学院 | A kind of method of coastal tidal mud quick ecologicalization treatment |
| CN105359663B (en) * | 2015-11-30 | 2017-10-31 | 天津吉天环境科技发展有限公司 | Saline-alkali soil improvement method |
| CN105419812B (en) * | 2015-11-30 | 2018-11-27 | 天津吉天环境科技发展有限公司 | Application of soil raising agent in saline-alkali soil improvement |
| CN105295945B (en) * | 2015-11-30 | 2019-03-15 | 天津吉天环境科技发展有限公司 | Soil bulking agent |
| CN106396883A (en) * | 2016-08-30 | 2017-02-15 | 山东胜伟园林科技有限公司 | Saline and alkaline soil improvement agent including soil loosening agent, and preparation method of soil improvement agent |
| CN106961864B (en) * | 2017-05-16 | 2019-09-10 | 河海大学 | A kind of the alkaline land improving system and its modification method of wells connecting with canals |
| CN107512843B (en) * | 2017-07-17 | 2020-10-30 | 中山大学 | Sludge dewatering system based on circulating salt solution dialysis and dewatering method thereof |
| CN107852880B (en) * | 2017-12-01 | 2023-06-09 | 天津弘景环境科技有限公司 | Coastal saline and alkaline area is with falling drainage and separating drenching layer and hidden pipe system of arranging saline and alkaline |
| CN108781576B (en) * | 2018-05-25 | 2021-06-01 | 河海大学 | Beach desalting method coupling water circulation |
| CN111328489A (en) * | 2020-01-19 | 2020-06-26 | 天津大学 | System and method for efficiently improving coastal heavy saline soil by rainwater |
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| CN112207123A (en) | 2021-01-12 |
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