CN101805137A - Sea sand desalting method - Google Patents

Sea sand desalting method Download PDF

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Publication number
CN101805137A
CN101805137A CN201010130850A CN201010130850A CN101805137A CN 101805137 A CN101805137 A CN 101805137A CN 201010130850 A CN201010130850 A CN 201010130850A CN 201010130850 A CN201010130850 A CN 201010130850A CN 101805137 A CN101805137 A CN 101805137A
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water
sand
valve
body layer
comb
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CN201010130850A
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陈慧玲
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Priority to CN201010130850A priority Critical patent/CN101805137A/en
Priority to CN2010102362066A priority patent/CN101905955B/en
Publication of CN101805137A publication Critical patent/CN101805137A/en
Priority to PCT/CN2011/000485 priority patent/WO2011116632A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Revetment (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

The invention relates to a sea sand desalting method. The method comprises the following steps: (1) firstly placing sea sand on the inverted filter layer of a desalting tank, soaking for more than half an hour, wherein the desalting tank has a structure that the lower part of the tank is provided with the inverted filter layer, discharge pipes are distributed in the inverted filter layer, the upper part of the desalting tank is provided with an upper valve and a lower valve, and the upper valve is set to water filling and soaking and the lower valve is set to close in step (1); and (2) setting the upper valve to secondary water filling after the completion of soaking, and opening the lower valve to discharge water after the completion of water filling, wherein the water filling amount is not less than the required water filling amount to realize the volume amount corresponding to a height of 5cm higher than the surface of the sand body, and the lower valve can be set to water filling and upper valve to discharge for the secondary water filling. By filling sea water or fresh water to the upper part or the lower part of the soaked sea sand, the invention adds a water pressure to discharge water the chloride ion content of which is increased as a result of soaking by extrusion; the invention is provided with the semi-enclosed desalting tank and inverted filter; and meanwhile, the invention has the functions of sea sand containing and water soaking.

Description

A kind of sea sand desalting method
Technical field:
The present invention relates to sea sand desalting method.
Background technology:
Have extra large sand to be used for building both at home and abroad very early, Japanese architecture is extra large sand more than 90% with sand.China has developed the Ningbo City, Zhejiang Province the complete standard equipment of sea sand desalting, and extra large sand is handled chloride content average out to 0.01% in the sand of back through desalination.What adopted China Ningbo City, Zhejiang Province is will at first extra large sand be poured in the service sink to flood, be put in the feed bin then, mechanical rotation drives feed bin and goes into the pond flushing repeatedly, thereby reduce the method for extra large sand chloride ion content, there are shortcomings such as early investment is big, working cost is high, water consumption is big in this method.
The technology kind of the relevant extra large sand desalination in countries in the world can be divided into aproll nature washing out method, natural placement methods, mechanical process now.
Aproll nature washing out method 1m 3Sea sand approximately cleans with the fresh water of 0.2t, and cleaning equipment is fairly simple, and the extra large chiltern amount that this method was handled is comparatively general.
The nature placement methods be with extra large sand wash to certain thickness, stacking several months or several years naturally is according to needs two months at least in season.Utilize the qualified back of sample examination saltiness to use.This method is saved, but time-consuming, effect differs, and can not solve emergency requirement.Be difficult to satisfy the demand of speed of application.
Through repetition test, find that there are relation the speed of extra large sand chloride ion content minimizing and the time of dipping.At the dipping initial stage, the speed that extra large sand chloride ion content reduces is very fast, increase in time, and the speed that chloride ion content reduces is more and more slower, no longer reduces until chloride ion content.In this course, the water chloride ion content that floods in the extra large sand space increases gradually.
The water that method in the past increases because of the dipping chloride ion content is to discharge extra large sand body under self-gravity action naturally, but because the adsorption on extra large sand surface is too little from gravity, the moisture that increases because of the dipping chloride ion content is difficult to discharge in a large number.Not only increase extra large sand chloride ion content, also increased the chloride ion content that injects fresh water for flooding once more.
Summary of the invention:
The objective of the invention is to overcome above-mentioned defective, a kind of sea sand desalting method is provided.
The solution of the present invention step is:
1. earlier extra large sand is put into desalination the pond is counter and filter on the body layer, tiling back injection seawater or fresh water are to more than the sand body face, dipping is more than half an hour, the desalination pool structure is anti-filter body layer for the bottom, pond is provided with, be laid with comb in the anti-filter body layer, the fairlead of comb is fixed the next valve of connection after passing pool wall, and fresh-water pool top is provided with upper valve, this step is upper valve water filling dipping, the next valve closes;
2. after dipping is finished, the water filling of upper valve secondary, water injection rate is to be not less than the sand body surface to the volumetric quantity between the steep water upper surface, should to satisfy simultaneously the water injection rate requirement that is not less than sand body surface above 5cm height volumetric quantity, after finishing, water filling opens the next valve draining, till water has been arranged.
Second kind of scheme of the present invention the steps include:
1. earlier extra large sand is put into desalination the pond is counter and filter on the body layer, tiling back injection seawater or fresh water are to more than the sand body face, dipping is more than half an hour, the desalination pool structure is anti-filter body layer for the bottom, pond is provided with, be laid with comb in the anti-filter body layer, the fairlead of comb is fixed the next valve of connection after passing pool wall, and fresh-water pool top is provided with upper valve, this step is upper valve water filling dipping, the next valve closes;
2. after dipping is finished, the next valve is driven valve as water intaking valve, toward desalination pond water filling, water injection rate is greater than extra large sand body lower surface to the volumetric quantity between the upper valve height, and steep water and injection water are discharged from the upper valve as overflow port;
3. after the overflow end of job, the next valve stops water filling, changes draining into, until emptying.
The invention has the advantages that:
1, the higher water of chloride ion content is discharged the mechanism difference: the water that increases because of the dipping chloride ion content in the dipping method was to discharge extra large sand body under action of gravity naturally in the past, but because the adsorption on extra large sand surface, this discharge method is not thorough, also stays a large amount of moisture because of the increase of dipping chloride ion content in the extra large sand body.Method of the present invention by on impregnated extra large sand top or the bottom inject the method for seawater or fresh water, additional water pressure extruding is discharged because of the water that the dipping chloride ion content increases; Utilize the affinity between the water molecules simultaneously, the fresh water or the low chlorine ion content water of sneaking into the steep water that part increases because of the dipping chloride ion content rapidly be adsorbed on the merging and it is progressively pushed, peels off the sand body that goes to sea of extra large sand surface because of flooding moisture that extra large sand chloride ion content increases.
2, desalting equipment difference: natural placement methods adopts nature to stack, and semi-enclosed desalination pond is not set; Other indivedual methods are provided with semi-enclosed pond, but the bottom is provided with no more than 2 water vents, for preventing that the line clogging aperture is not more than in 2～3 times of areal extents of aperture section anti-filter body are set; The semiclosed desalination pond of the present invention's design possesses the function of holding extra large sand and steep water simultaneously, the anti-filter body layer that bottom or low water head portion are provided with evenly and comprehensively, and it evenly and comprehensively is provided with water vent down as required.
Description of drawings:
Fig. 1 desalinates the pool structure synoptic diagram for the present invention.
Fig. 2 is alternative plan desalination pool structure synoptic diagram of the present invention.
Embodiment:
Anti-body layer (3) structure of filtering of fresh-water pool of the present invention (1) is: anti-comb (5) structure of filtering body layer (3) is: the little cross current of big pipe that is communicated with fairlead and plurality of rows, the little water pipe water outlet of plurality of rows is distributed in anti-filter body layer (3) space, the sand that granular size is different, rubble, cobble are buried comb (5) wherein underground at the bottom of being laid on the pond, constitute anti-filter body layer (3), the sand that granular size is different, rubble, cobble particle from top to bottom increase step by step.
Interlayer was formed under anti-filter body layer (3) was reached by last filtering layer, last structure of filtering layer is equipped with granular size different sand, rubble, cobble for being fixed on the porous liner plate that gathers on the pool wall all around, and the sand that granular size is different, rubble, cobble particle from top to bottom increase step by step; Form the following interlayer of a clearance space at the bottom of liner plate lower surface and the pond between the upper surface, laying comb (5) in the following interlayer inner chamber, comb (5) structure is: the little cross current of big pipe that is communicated with fairlead and plurality of rows, the little water pipe water outlet of plurality of rows is distributed in anti-filter body layer (3) space.
Anti-filter body layer (3) upper surface also is provided with geotechnological layer of cloth.
The next valve (4) is communicated with water source valve, water discharging valve by threeway, and the water source valve the other end is communicated with water source tube, and the water discharging valve the other end is communicated with water shoot.
Upper valve (2) is communicated with water source valve, water discharging valve by threeway, and the water source valve the other end is communicated with water source tube, and the water discharging valve the other end is communicated with water shoot.
Can be during dipping with seawater or fresh water, because saltness unsaturation in the seawater still can be changed salt.Certainly better with fresh water, under the environment that fresh water lacks, can save fresh water.
Implementation method one:
1. extra large sand is inserted desalination bottom, pond (1), determine shop raising degree as required, shakeout with machinery, close the next valve (4), inject fresh water toward desalination pond (1) then, fresh water covers extra large sand body top (also can inject fresh water earlier in desalination pond (1), insert extra large sand then, fresh water covers extra large sand body top).Determine to flood height as required.
2. behind the dipping certain hour (being not less than half an hour), fresh water is injected desalination pond (1) rapidly, injecting the fresh water amount should be to be not less than on the extra large sand body face because of flooding the steep water water yield that extra large sand chloride ion content increases, and be enough to flood extra large sand surface 5cm at least, because the original fresh water that injects fresh-water pool floods extra large sand through after a while, chloride ion content increases.For the chloride ion content that reduces water in the extra large sand body space (is preferably earlier opened the next valve (4), the steep water water level is reduced to is lower than extra large sand body upper surface, be not easy to sneak in the fresh water because of the steep water that floods extra large sand chloride ion content increase like this), make water logging not have extra large sand, open the next valve of draining (4), under the effect of water pressure, fresh water or sneak into fresh water that part increases steep water because of dipping chloride ion content seepage flow downwards promptly, the go to sea space of sand of steep water extruding that evenly and all sidedly will amount of chloride ions increases owing to dipping extra large sand for some time, wash the chlorion on extra large sand surface, extra large sand chloride ion content is significantly reduced, realize the renewal of the extra large sand water body of dipping simultaneously.
In the drainage procedure, through after a while the dipping and to some extent the water of salinize discharged, substituted.
3. because of after the steep water eliminating of flooding extra large sand chloride ion content increase, close the next valve (4), continue injection and make fresh water cover extra large sand body top, continue to flood the operation of repeating step 2 then;
Carry out one like this to for several times, just meet the requirement of national building sand standard chloride ion content through the extra large sand of desalination.Since sea, China various places sand chloride ion content difference, the sand chloride ion content standard difference of national building sand different stage, and concrete number of times can be determined according to particular case, service requirements and the dipping time of extra large sand.
Implementation method two:
1. extra large sand is inserted desalination bottom, pond (1), determine shop raising degree as required, shakeout with machinery, inject fresh water toward desalination pond (1), close the next valve (4) then, fresh water covers extra large sand body top (also can inject fresh water earlier in desalination pond (1), insert extra large sand then, fresh water covers extra large sand body top).Determine to flood height as required.
2. behind the dipping certain hour, open the next valve (4), inject fresh water from the next valve (4), water is discharged from desalination top, pond (1), under the effect of water pressure, fresh water or sneak into fresh water that part increases steep water because of dipping chloride ion content seepage flow upwards promptly, the go to sea space of sand of steep water extruding that evenly and all sidedly will amount of chloride ions increases owing to dipping extra large sand for some time, and make steep water flow out desalination pond (1), wash the chlorion on extra large sand surface, extra large sand chloride ion content is significantly reduced, realize the renewal of the extra large sand water body of dipping simultaneously.
In the drainage procedure, through after a while the dipping and to some extent the water of salinize discharged, substituted.
3. continue dipping, the operation of repeating step 2 then;
Carry out one like this to for several times, just meet the requirement of national building sand standard chloride ion content through the extra large sand of desalination.Since sea, China various places sand chloride ion content difference, the sand chloride ion content standard difference of national building sand different stage, and concrete number of times can be determined according to particular case, service requirements and the dipping time of extra large sand.
Then open the next valve (4), the water in the desalination pond (1) is drained.
Implementation method three:
Flood before if inject the extra large sand in desalination pond (1), extra large sand is to pour in the desalination pond (1) together with steep water simultaneously; Perhaps adopt other way that the incidental solvable muriate in extra large sand surface is dissolved in the incidental water, can reduce the steeping process of implementation method one or implementation method two this moment, directly forces to push the sand body that goes to sea with the fresh water water that chloride ion content is higher.Treated extra large sand chloride content index just can reach national building sand standard.
The present invention will be flooded and wash extra large sand dexterously and be combined, at first carry out extra large sand dipping, muriate attached to extra large sand is dissolved or break away from extra large sand surface, utilize the big principle of sand perviousness, at the artificial additional water pressure of extra large sand body upstream and downstream, make fresh water successively progressively seepage flow through extra large sand body, the steep water that extruding increases because of the dipping chloride ion content, it is progressively pushed the sand body that goes to sea, and the chlorion on extra large sand surface formed flushing repeatedly, formation repeatedly dipping combines with flushing, thereby reaches the effect of desalted sea sand, the ingenious water pressure of utilizing of this programme, overcome the shortcoming of natural discharge method, improve sea sand desalting effect and efficient, can save a large amount of fresh water, reached the effect of getting twice the result with half the effort.The electromechanical equipment that the sea sand desalting device that the present invention developed need be purchased is few, the advantage that has that early investment is few, working cost is low etc.
According to desalination method of the present invention and desalting equipment, the extra large sand of taking from Fujian Province's Ningde City to be handled, this sea sand chloride ion content is 0.14%, through 8 hours dippings, injects fresh water and discharges steep water.Extra large sand muriate after handling through desalination is less than 0.01% national building sand primary standard.

Claims (8)

1. sea sand desalting method, it is characterized in that: the present invention program's step is:
1. earlier extra large sand is put into anti-the filter on the body layer (3) in desalination pond (1), tiling back injection seawater or fresh water are to more than the sand body face, dipping is more than half an hour, desalination pond (1) structure is anti-filter body layer (3) for the bottom, pond is provided with, be laid with comb (5) in the anti-filter body layer (3), the fairlead of comb (5) is fixed a connection the next valve (4) after passing pool wall, and fresh-water pool top is provided with upper valve (2), this step is upper valve (a 2) water filling dipping, and the next valve (4) is closed;
2. after dipping is finished, upper valve (2) secondary water filling, water injection rate is to be not less than the sand body surface to the volumetric quantity between the steep water upper surface, should satisfy the water injection rate requirement that is not less than sand body surface above 5cm height volumetric quantity simultaneously, after finishing, water filling opens the next valve (4) draining, till water has been arranged.
2. a kind of sea sand desalting method according to claim 1, it is characterized in that anti-comb (5) structure of filtering body layer (3) is: the little cross current of big pipe that is communicated with fairlead and plurality of rows, the little water pipe water outlet of plurality of rows is distributed in anti-filter body layer (3) space, the sand that granular size is different, rubble, cobble are buried comb (5) wherein underground at the bottom of being laid on the pond, constitute anti-filter body layer (3), the sand that granular size is different, rubble, cobble particle from top to bottom increase step by step.
3. a kind of sea sand desalting method according to claim 1, it is characterized in that: the anti-body layer (3) of filtering is made up of last filtering layer and following interlayer, last structure of filtering layer is equipped with granular size different sand, rubble, cobble for being fixed on the porous liner plate that gathers on the pool wall all around, and the sand that granular size is different, rubble, cobble particle from top to bottom increase step by step; Form the following interlayer of a clearance space at the bottom of liner plate lower surface and the pond between the upper surface, laying comb (5) in the following interlayer inner chamber, comb (5) structure is: the little cross current of big pipe that is communicated with fairlead and plurality of rows, the little water pipe water outlet of plurality of rows is distributed in anti-filter body layer (3) space.
4. according to claim 2 or 3 described a kind of sea sand desalting methods, it is characterized in that: anti-body layer (3) upper surface of filtering also is provided with geotechnological layer of cloth.
5. sea sand desalting method, it is characterized in that: the present invention program's step is:
1. earlier extra large sand is put into anti-the filter on the body layer (3) in desalination pond (1), tiling back injection seawater or fresh water are to more than the sand body face, dipping is more than half an hour, desalination pond (1) structure is anti-filter body layer (3) for the bottom, pond is provided with, be laid with comb (5) in the anti-filter body layer (3), the fairlead of comb (5) is fixed a connection the next valve (4) after passing pool wall, and fresh-water pool top is provided with upper valve (2), this step is upper valve (a 2) water filling dipping, and the next valve (4) is closed;
2. after dipping is finished, the next valve (4) is driven valve as water intaking valve, toward desalination pond (1) water filling, water injection rate is greater than extra large sand body lower surface to the volumetric quantity between upper valve (2) height, makes steep water and injects water from upper valve (2) discharge as overflow port;
3. after the overflow end of job, the next valve (4) stops water filling, changes draining into, until emptying.
6. a kind of sea sand desalting method according to claim 5, it is characterized in that: the anti-body layer (3) of filtering is made up of last filtering layer and following interlayer, last structure of filtering layer is equipped with granular size different sand, rubble, cobble for being fixed on the porous liner plate that gathers on the pool wall all around, and the sand that granular size is different, rubble, cobble particle from top to bottom increase step by step; Form the following interlayer of a clearance space at the bottom of liner plate lower surface and the pond between the upper surface, laying comb (5) in the following interlayer inner chamber, comb (5) structure is: the little cross current of big pipe that is communicated with fairlead and plurality of rows, the little water pipe water outlet of plurality of rows is distributed in anti-filter body layer (3) space.
7. a kind of sea sand desalting method according to claim 5, it is characterized in that: the anti-body layer (3) of filtering is made up of last filtering layer and following interlayer, last structure of filtering layer is equipped with granular size different sand, rubble, cobble for being fixed on the porous liner plate that gathers on the pool wall all around, and the sand that granular size is different, rubble, cobble particle from top to bottom increase step by step; Form the following interlayer of a clearance space at the bottom of liner plate lower surface and the pond between the upper surface, laying comb (5) in the following interlayer inner chamber, comb (5) structure is: the little cross current of big pipe that is communicated with fairlead and plurality of rows, the little water pipe water outlet of plurality of rows is distributed in anti-filter body layer (3) space.
8. according to claim 6 or 7 described a kind of sea sand desalting methods, it is characterized in that: anti-body layer (3) upper surface of filtering also is provided with geotechnological layer of cloth.
CN201010130850A 2010-03-24 2010-03-24 Sea sand desalting method Pending CN101805137A (en)

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Application Number Priority Date Filing Date Title
CN201010130850A CN101805137A (en) 2010-03-24 2010-03-24 Sea sand desalting method
CN2010102362066A CN101905955B (en) 2010-03-24 2010-07-22 Method for desalting sea sand and device for desalting sea sand with same
PCT/CN2011/000485 WO2011116632A1 (en) 2010-03-24 2011-03-22 Method and device for desalting sea sand

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CN201010130850A CN101805137A (en) 2010-03-24 2010-03-24 Sea sand desalting method

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CN2010102362066A Expired - Fee Related CN101905955B (en) 2010-03-24 2010-07-22 Method for desalting sea sand and device for desalting sea sand with same

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Cited By (5)

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WO2011116632A1 (en) * 2010-03-24 2011-09-29 Chen Huiling Method and device for desalting sea sand
CN104261710A (en) * 2014-09-19 2015-01-07 深圳大学 Desalting pond and method for desalting sea sand
CN105776920A (en) * 2016-01-29 2016-07-20 深圳市善信环保科技有限公司 Device for sea sand desalination and film-coating sand washing and implementation method thereof
CN107235648A (en) * 2017-04-19 2017-10-10 华侨大学 A kind of device and method of electrochemical process desalted sea sand
CN113232784A (en) * 2021-04-26 2021-08-10 上海开久商品混凝土有限公司 Sand transporting ship for sea sand desalination treatment

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JP5494993B1 (en) * 2012-12-04 2014-05-21 みつる 高崎 Sea sand removal method
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011116632A1 (en) * 2010-03-24 2011-09-29 Chen Huiling Method and device for desalting sea sand
CN104261710A (en) * 2014-09-19 2015-01-07 深圳大学 Desalting pond and method for desalting sea sand
CN104261710B (en) * 2014-09-19 2016-03-02 深圳大学 A kind of desalination pond of desalted sea sand and method
CN105776920A (en) * 2016-01-29 2016-07-20 深圳市善信环保科技有限公司 Device for sea sand desalination and film-coating sand washing and implementation method thereof
CN105776920B (en) * 2016-01-29 2019-12-17 深圳市善信环保科技有限公司 Equipment for sea sand desalination and film-covering sand washing and implementation method thereof
CN107235648A (en) * 2017-04-19 2017-10-10 华侨大学 A kind of device and method of electrochemical process desalted sea sand
CN113232784A (en) * 2021-04-26 2021-08-10 上海开久商品混凝土有限公司 Sand transporting ship for sea sand desalination treatment
CN113232784B (en) * 2021-04-26 2022-08-19 上海开久商品混凝土有限公司 Sand transporting ship for sea sand desalination treatment

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