CN105110668A - Sea sand desalination treatment technique and system - Google Patents
Sea sand desalination treatment technique and system Download PDFInfo
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- CN105110668A CN105110668A CN201510490854.7A CN201510490854A CN105110668A CN 105110668 A CN105110668 A CN 105110668A CN 201510490854 A CN201510490854 A CN 201510490854A CN 105110668 A CN105110668 A CN 105110668A
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Abstract
The present invention discloses a sea sand desalination treatment technique. The treatment technique comprises the steps of a) immersing sea sand into a dechlorinating agent to perform dechlorination of the sea sand; b) separating the sea sand from the dechlorinating agent solution; and c) heating the dechlorinated sea sand. Besides, the present invention further discloses a sea sand desalination system. According to the present invention, ozonated water or a sodium persulfate acidic solution is used to perform dechlorination on the sea sand, wherein a chemical reaction occurs in the dechlorination process and chloride ions turn to chlorine gas; the sea sand is separated from the dechlorinating agent solution; and the chlorine gas remained on the surface of the sea sand is vaporized after heating, thereby preventing the chlorine gas from causing damage to the human body in the process of sea sand utilization and meanwhile achieving a dechlorination effect. The present invention can achieve the dechlorination effect simply by using the ozonated water or the sodium persulfate acidic solution, and compared with the effect and cost of dechlorination by rinsing with fresh water, the effect of desalination by using the dechlorinating agent is better and the cost of desalination is lower.
Description
Technical field
The present invention relates to a kind of sea sand desalting treatment system, in addition, also relate to a kind of sea sand desalting treatment system.
Background technology
Along with the fast development of China's construction market, river sand resource is day by day deficient, can not meet raw-material demand for building, at coastland Appropriate application sea sand resources, seems day by day urgent with the situation alleviating river sand resource deficiency.China's Coastal Areas especially coastland, west of Guangdong Province Yuexi sea sand resources is enriched, but because extra large sand contains the villaumites such as sodium-chlor, because villaumite can accelerate reinforcement corrosion, thus process without desalination or process the life-span that underproof extra large sand has a strong impact on buildings, thus limiting the application of extra large sand.
Mainly contain for the state-of-the-art technology measure of villaumite in extra large sand both at home and abroad: extra large sand fresh water flush method, reinforcing steel bar corrosion inhibitor method, reinforcing bar plating method, concrete proportioning optimized method etc.Wherein extra large sand fresh water flush method is the method commonly used the most, and its production technology characteristic is " turn sieve and remove mud, secondary fresh water filter wash ".Substantially can remove clod, shell and other foreign material after purification, saltiness meets the requirements substantially.But repeat owing to itself repeatedly need use fresh water to rinse, water utilization rate is low, and production cost is high, and especially in the area that Freshwater resources lack, the conventional purge technique of extra large sand exists very large limitation.
Chinese invention patent, application number is 201010236206.6, the device disclosing a kind of sea sand desalting method and utilize the method desalted sea sand to use, the method mainly comprises the following steps (see the 55th section, specification sheets), first extra large sand dipping is carried out, that the muriate be attached on extra large sand dissolves or departs from extra large sand surface, utilize the principle that sand perviousness is large, seawater or fresh water is injected on impregnated extra large sand top or bottom, by utilizing water pressure, overcome the shortcoming that traditional natural discharges method, improve sea sand desalting effect and efficiency.Aforesaid method is removed the villaumite in extra large sand by the pressure of seawater or fresh water, for traditional extra large sand fresh water flush method, better effects if, but owing to needing in its process to use more than at least twice water to rinse, require very high to water resources, water content consumption is large.
Chinese utility model patent, application number is 201320597916.0, and work has opened a kind of scrubbing system, and this system comprises the devices such as duplex sand washer, adds ozone water in duplex sand washer, to reach the effect of removing villaumite.But also containing chlorine in the extra large sand after dechlorinating owing to utilizing ozone, must add heat abstraction could use, and this utility model does not remove device or the step of chlorine, therefore there is potential safety hazard.Meanwhile, the content that the ozone water in this utility model is not concrete.
Shanghai City, China architecture science research institute (group) company limited also delivered one section about " performance of extra large sand and new type purification technical study ", this technical article is published in ten-thousand-ton train net, article is numbered 1007-046X (2011) 05-0012-03, the flow process brief description of this article is as follows: first time fresh water flush-freshwater soaking-second time fresh water flush-immersion-fresh water recycle again, although the method can reach water-saving effect to a certain extent, but because fresh water is after repeatedly utilizing, villaumite in water is inevitable more, be used for wash cycles sea sand do not reach building demand, if do not recycle fresh water, fresh water usage quantity can be caused again excessive.
Summary of the invention
For each sea sand desalting method or the device of above-mentioned prior art, the object of the invention is to provide a kind of sea sand desalting treatment process, at least one to solve the problems of the technologies described above.
According to an aspect of the present invention, provide a kind of sea sand desalting treatment process, comprise the following steps:
A). extra large sand is immersed in dechlorinating agent dechlorination is carried out to extra large sand, the ozone water of described dechlorinating agent solution to be mass concentration be 50mg/L ~ 150mg/L or massfraction are the Sodium Persulfate acidic solution of 5% ~ 10%, the mass ratio of dechlorinating agent and extra large sand is 1:2 ~ 3:1, and the soak time of extra large sand in dechlorinating agent is 1 ~ 5 hour;
B). extra large sand is separated from dechlorinating agent solution;
C). heat the extra large sand after dechlorination, Heating temperature is 60 DEG C ~ 90 DEG C, to remove the chlorine being attached to extra large sand surface.
The ozone water of aforementioned proportion or Sodium Persulfate acidic solution is utilized to carry out dechlorination process to extra large sand in the present invention, can chemical reaction be there is in the process of dechlorination process, chlorion oxidation becomes chlorine, by extra large sand and dechlorinating agent solution separating, and the chlorine remained on extra large sand surface volatilize go out avoid using chlorine in extra large sand process to work the mischief to human body after heating, while can also reach dechlorination effect.The present invention only needs to use ozone water or Sodium Persulfate acidic solution just can reach the effect of dechlorination, for the fresh water flush dechlorination in background technology, utilizes dechlorinating agent can reach better effect.Therefore, sea sand desalting process of the present invention is simple, and dechlorination effect is obvious, and can fresh-water-saving resource, more practical in the area of scarcity of fresh water resources.
It is low that the Sodium Persulfate acidic solution dechlorinating agent that this patent uses has cost, and dechlorinate effective advantage.Under general condition, Sodium Persulfate solution and chlorion are nonreactive, in acid condition, namely, in Sodium Persulfate acidic solution, chloride system exists with hydrochloric acid and hydrochloride form, and Sodium Persulfate can produce potentiometric titrations, potentiometric titrations oxidisability is very strong, chlorion can be oxidized to chlorine radical, generate chlorine, thus removing chlorion.Thus, " Sodium Persulfate acidic solution " dechlorinating agent that this patent uses is not easy to expect.
In some embodiments, before step a), following steps are also had: be positioned on vibratory screening apparatus by extra large sand, the shell in extra large sand and waste material separated from extra large sand by vibratory screening apparatus.Thus, needed to carry out the process of removal macrobead foreign material to extra large sand before dechlorinating, thus facilitate follow-up dechlorination.
In some embodiments, in step c) also have following steps afterwards: utilize fresh water to rinse the extra large sand after heating.Thus, after fresh water flush, the chloride ion content in extra large sand can be reduced further, obtain the extra large sand of better quality.
In some embodiments, step b) separate mode for filter extra large sand or extracting directly sea sand.Thus, filtering extra large sand can for filter out extra large sand by filtering net, and extracting directly sea sand can utilize external tool, directly fishes for out from dechlorinating agent by extra large sand.
In some embodiments, step c) heat for extra large sand is placed in seal cavity, the chlorine of heat-processed generation is collected by chlorine pot.Thus, chlorine has toxicity, collects to prevent from human body is produced to harm and produces atmospheric environment polluting.
This patent adopts dechlorinating agent soaking technology, can ensure that extra large sand and dechlorinating agent fully contact and react, effectively remove chlorion.In addition, because the solubleness of chlorine in water generated is less, have part chlorine can be attached to extra large sand surface, this patent makes the remaining chlorine being attached to sand surface remove fast by heating unit, by chlorine pot, chlorine is recycled simultaneously, also avoid chlorine to the pollution of atmospheric environment.
According to another one side of the present invention, present invention also offers a kind of sea sand desalting treatment system, comprise dechlorination pond, bucket elevator and heating unit, bucket elevator is provided with lift bucket, bucket elevator one end is stretched in dechlorination pond, dechlorinating agent solution is added in dechlorination pond, the ozone water of dechlorinating agent solution to be mass concentration be 50mg/L ~ 150mg/L or massfraction are the Sodium Persulfate acidic solution of 5% ~ 10%, external sea sand is poured in dechlorination pond, bucket elevator stretches into the extra large sand after the lift bucket transport dechlorination in dechlorination pond to heating unit place, and heating unit heats extra large sand.
The chlorion in extra large sand can be removed after adding dechlorinating agent solution in dechlorination pond in the present invention, the ozone water of dechlorinating agent solution to be mass concentration be 50mg/L ~ 150mg/L or massfraction are the Sodium Persulfate acidic solution of 5% ~ 10%, relative to adding for ozone water in the duplex sand washer in background technology scrubbing system, ozone water content of the present invention is definite, good effect can be reached, simultaneously, extra large sand can be transported to heating unit place and heat, to remove the chlorine be attached on extra large sand by bucket elevator.For background technology scrubbing system, the present invention can remove chlorine, prevents chlorine from producing harm to human body.
In some embodiments, also comprise the first transmitting device and vibration sand sieving machine, extra large sand is delivered on vibration sand sieving machine by the first transmitting device, and through vibration sand sieving machine by the magazins' layout in extra large sand out, the extra large sand after removal of impurities is poured in dechlorination pond by vibration sand sieving machine.Thus, the first transmitting device can transport extra large sand on vibration sand sieving machine, and vibration sand sieving machine to by the magazins' layout in extra large sand out, can facilitate the subsequent disposal of follow-up extra large sand.
In some embodiments, also comprise tightness system and the second transmitting device, second transmitting device is located in tightness system, heating unit is located on the second transmitting device, tightness system is provided with multiple opening, one of them opening is connected with outside chlorine pot, and extra large sand is transported on the second transmitting device by the opening part of tightness system by bucket elevator.Thus, extra large sand moves on the second transmitting device, and heat-processed can be made more even, and chlorine pot collects chlorine simultaneously, prevents chlorine from working the mischief to human body.
In some embodiments, also comprise the vibration jetter being located at second transmitting device one end, extra large sand transfers on vibration jetter by the second transmitting device.Thus, vibration jetter can carry out further dechlorination process to ejection fresh water to extra large sand, promotes extra large chiltern amount.
In some embodiments, vibration jetter comprises support, is located at the filter mesh sieve on support, be located at the bobbing machine on filter mesh sieve, filter mesh sieve lower end, be positioned at support be provided with flowing water outlet, flowing water outlet be connected with outside tank by pipeline, the top of filter mesh sieve is provided with sprinkler head.Thus, the fresh water after flushing can be flowed out by filter mesh sieve, then fresh water can be flow back in outside tank by flowing water mouth, can recycle fresh water, further fresh-water-saving resource.
Accompanying drawing explanation
Fig. 1 is the structure diagram of the desalination treatment system of one embodiment of the present invention.
Fig. 2 is the schema of the sea water desaltination treatment process of one embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 schematically shows the structure of the desalination treatment system of one embodiment of the present invention.
As shown in Figure 1, a kind of desalination treatment system, comprises the first transmitting device 1, vibration sand sieving machine 2, dechlorination pond 3, bucket elevator 4, tightness system 5, second transmitting device 6 and vibration jetter 7 from left to right successively.
As shown in Figure 1, first transmitting device 1 is conveyor or other devices (as automatic handgrip etc.), first transmitting device 1 slant setting, the pan feeding place of the first transmitting device 1 is positioned at the below of extra large sand hopper, discharging place position is connected with vibration sand sieving machine 2, and extra large sand can arrive in vibration sand sieving machine 2 after the transmission of the first transmitting device 1.
Vibration sand sieving machine 2 is provided with vibratory screening apparatus 21, vibratory screening apparatus 21 has mesh structure and is illustrated in figure 1 slant setting, by setting the aperture of screen cloth, the foreign material (as: shell etc.) being greater than extra large sand diameter can be made to fall, extra large sand after falling then by vibration sand sieving machine 2 right-hand member, and voluntarily landing in dechlorination pond 3.
Can add dechlorinating agent solution in dechlorination pond 3, dechlorinating agent solution has two kinds usually, ozone water and Sodium Persulfate acidic solution, and these two kinds of materials all can, with the major impurity sodium-chlor generation chemical reaction in extra large sand, make chlorion be oxidized to chlorine.
It is low that Sodium Persulfate acidic solution dechlorinating agent has cost, and dechlorinate effective advantage.Under general condition, Sodium Persulfate solution and chlorion are nonreactive, in acid condition, namely, in Sodium Persulfate acidic solution, chloride system exists with hydrochloric acid and hydrochloride form, and Sodium Persulfate can produce potentiometric titrations, potentiometric titrations oxidisability is very strong, chlorion can be oxidized to chlorine radical, generate chlorine, thus removing chlorion.As shown in Figure 1, one end of bucket elevator 4 is fixedly mounted in dechlorination pond 3, the other end is positioned at the top of tightness system 5, bucket elevator 4 is provided with lift bucket, bucket elevator 4 is in circulation uphill process as shown in Figure 1, and the extra large sand in dechlorination pond 3 can landing be to stretching in dechlorination pond 3 in lift bucket voluntarily, and then lift bucket rises, extra large sand in dechlorination pond 3 can be proposed, and be transported to the top of tightness system 5.
As shown in Figure 2, second transmitting device 6 is conveyor or other devices (as automatic handgrip etc.), second transmitting device 6 is placed in tightness system 5, tightness system 5 forms into sand hole 51, and the extra large sand that bucket elevator 4 transmits can fall on the second transmitting device 6 from entering sand hole 51.On the second device, also heating unit is installed simultaneously, heating unit can heat the extra large sand on the second device, chlorine in dechlorinating agent solution residual on extra large sand is volatilized away, collects through the chlorine collection device be connected with tightness system 5.Extra large sand through heating falls in tightness system 5, then extremely vibrates jetter 7 from the opening part landing (tightness system 5 slant setting) of tightness system 5 one end.
As shown in Figure 1, in the present embodiment, vibration jetter 7 can comprise with lower component, support 71, be arranged on filter mesh sieve 72 above support 71, from the second transmitting device 6, extra large sand landing is out on filter mesh sieve 72, above filter mesh sieve 72, be installed with sprinkler head 73, sprinkler head 73 is connected in outside tank, and the water of sprinkler head 73 place ejection falls on filter mesh sieve 72.Bobbing machine is in vibration processes, and extra large sand meeting bob, fully can contact with water in hopping process, can remove chlorion residual in extra large sand further.
Meanwhile, form flowing water outlet 711 in filter mesh sieve 72 lower end, flowing water outlet 711 uses by flowing into tank internal recycle after purification again.
Fig. 2 schematically shows the flow process of the sea water desaltination treatment process of one embodiment of the present invention.
As shown in Figure 2, a kind of flow process of sea water desaltination treatment process:
S101. be positioned on vibratory screening apparatus 21 by extra large sand, vibratory screening apparatus mesh aperture only allows extra large sand and the foreign material less than extra large sand diameter to pass through, and vibratory screening apparatus 21 by the shell in extra large sand and part waste material and extra large sand separation out, can reach the object removing impurity in extra large sand.
S102. the extra large sand separated through vibratory screening apparatus 21 is poured in dechlorination pond 3, and dechlorinating agent solution is added in dechlorination pond 3, sea sand soaks for some time in dechlorination pond 3, dechlorinating agent solution can be Sodium Persulfate acidity or ozone water, dechlorinating agent solution can with the major impurity in extra large sand and sodium-chlor generation chemical reaction, make chlorion be oxidized to chlorine.
S103. by extra large sand from dechlorinating agent solution separating out; Typically, the mode of separation has two kinds, and one adopts filtering net, is poured on filtering net, filtered out extra large sand by the dechlorinating agent solution in extra large sand, leave extra large sand.Another kind method is: extracting directly, and the density due to extra large sand is greater than dechlorinating agent solution, and therefore extra large sand can be deposited in dechlorinating agent solution, only needs to utilize lift bucket to be extracted from dechlorinating agent solution by extra large sand.
S104. pour into be in seal cavity to the extra large sand after separation and heat, remove chlorine, and chlorine is collected by chlorine pot; Certainly, in order to make extra large sand in heat-processed can move in next step, can extra large sand be positioned on transmitting device, heat while transmission.
S105. fresh water is utilized to rinse extra large sand.
The desalted sea sand obtained to be verified above-mentioned technical process can meet the performance perameter such as chloride ion content, silt content, clod content of GB/T14684-2011 construction sand standard test finished product desalted sea sand.Elitely select suitable processing condition, and carry out desalinating extra large sand according to above-mentioned processing step, and by outcome record in Table 1.
Table 1
In this technical process, the mass concentration of dechlorinating agent solution, mass ratio and the soak time of extra large sand in dechlorinating agent of the quality solubility of ozone water, the massfraction of Sodium Persulfate acidic solution, dechlorinating agent and extra large sand all can obtain suitable numerical value through test of many times, select to reach better effect by above-mentioned suitable numerical value, the extra large sand simultaneously after desalination meets the regulation of standard GB/T/T14684-2011 construction sand standard.
As can be seen from Table 1, the chloride ion content of the finished product desalted sea sand after sea sand desalting treatment process of the present invention and art breading, silt content and clod content meet the regulation of standard GB/T/T14684-2011 construction sand standard completely; Namely the chloride ion content of desalted sea sand is less than 0.06%, and silt content is less than 5.0%, the regulation that clod content is less than 2.0%.
Therefore, it is low that above-mentioned technical process has production cost, only needs antichlor just can reach the effect of dechlorination, only needs to consume a small amount of Freshwater resources simultaneously and just can improve extra large chiltern amount and reach building sand requirement, environmentally safe simultaneously.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (10)
1. sea sand desalting treatment process, is characterized in that, comprises the following steps:
A). extra large sand is immersed in dechlorinating agent dechlorination is carried out to extra large sand, the ozone water of described dechlorinating agent solution to be mass concentration be 50mg/L ~ 150mg/L or massfraction are the Sodium Persulfate acidic solution of 5% ~ 10%, the mass ratio of described dechlorinating agent and extra large sand is 1:2 ~ 3:1, and the soak time of extra large sand in dechlorinating agent is 1 ~ 5 hour;
B). extra large sand is separated from dechlorinating agent;
C). heat the extra large sand after dechlorination, Heating temperature is 60 DEG C ~ 90 DEG C, to remove the chlorine being attached to extra large sand surface.
2. sea sand desalting treatment process according to claim 1, is characterized in that, also has following steps: removed the shell in extra large sand and waste material before step a).
3. sea sand desalting treatment process according to claim 2, is characterized in that, in step c) also have following steps afterwards: utilize fresh water to rinse extra large sand.
4. the sea sand desalting treatment process according to any one of claims 1 to 3, is characterized in that, step b) separate mode for filter extra large sand or extracting directly sea sand.
5. the sea sand desalting treatment process according to any one of claims 1 to 3, is characterized in that, step c) be: extra large sand is placed in seal cavity and heats, collected the chlorine of heat-processed generation by chlorine pot.
6. a sea sand desalting treatment system, it is characterized in that, comprise dechlorination pond (3), bucket elevator (4) and heating unit, dechlorinating agent solution is added in described dechlorination pond (3), the ozone water of described dechlorinating agent solution to be mass concentration be 50mg/L ~ 150mg/L or massfraction are the Sodium Persulfate acidic solution of 5% ~ 10%, described bucket elevator (4) is provided with lift bucket, described bucket elevator (4) one end is stretched in described dechlorination pond (3), external sea sand is poured in described dechlorination pond (3), described bucket elevator (4) stretches into the extra large sand after the lift bucket transport dechlorination in dechlorination pond (3) to described heating unit place, described heating unit heats extra large sand.
7. sea sand desalting treatment system according to claim 6, it is characterized in that, also comprise the first transmitting device (1) and vibration sand sieving machine (2), extra large sand is delivered on vibration sand sieving machine (2) by described first transmitting device (1), through vibration sand sieving machine (2) by the magazins' layout in extra large sand out, the extra large sand after removal of impurities is poured in dechlorination pond (3) by vibration sand sieving machine (2).
8. sea sand desalting treatment system according to claim 7, it is characterized in that, also comprise tightness system (5) and the second transmitting device (6), described second transmitting device (6) is located in described tightness system (5), described heating unit is located on described second transmitting device (6), described tightness system (5) is connected with outside chlorine pot, and extra large sand is transported on the second transmitting device (6) by the opening of tightness system (5) by described bucket elevator (4).
9. sea sand desalting treatment system according to claim 8, it is characterized in that, also comprise the vibration jetter (7) being located at described second transmitting device (6) one end, extra large sand transfers in vibration jetter (7) by described second transmitting device (6).
10. sea sand desalting treatment system according to claim 9, it is characterized in that, described vibration jetter (7) comprises support (71), be located at the filter mesh sieve (72) on described support (71), be located at the bobbing machine on described filter mesh sieve (72), described filter mesh sieve (72) lower end, be positioned at support (71) be provided with flowing water outlet (711), described flowing water outlet (711) is connected with outside tank by pipeline, and the top of described filter mesh sieve (72) is provided with sprinkler head (73).
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| CN106345742A (en) * | 2016-10-17 | 2017-01-25 | 中国能源建设集团广东电力工程局有限公司 | Sea sand dechlorinating device |
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| CN106396447A (en) * | 2016-11-30 | 2017-02-15 | 国家海洋局第二海洋研究所 | Method for preparing high-performance building sand by desalting sea sand |
| CN106673559A (en) * | 2017-01-05 | 2017-05-17 | 陈冠臻 | Anti-corrosive concrete material for marine ecological engineering and preparation method thereof |
| CN106673559B (en) * | 2017-01-05 | 2018-10-02 | 陈冠臻 | Marine ecology engineering corrosion resistant concrete material and preparation method thereof |
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