CN210103778U - Sea sand desalination device - Google Patents
Sea sand desalination device Download PDFInfo
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- CN210103778U CN210103778U CN201920833847.6U CN201920833847U CN210103778U CN 210103778 U CN210103778 U CN 210103778U CN 201920833847 U CN201920833847 U CN 201920833847U CN 210103778 U CN210103778 U CN 210103778U
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Abstract
The utility model discloses a sea sand desalination device, which comprises a reclaimed water manufacturing system and a sea sand desalination system, wherein the reclaimed water manufacturing system at least comprises a reclaimed water pool, a reclaimed water purification desalination system and a reclaimed water storage tank which are connected in sequence, and reclaimed water in the reclaimed water pool is treated by the reclaimed water purification desalination system and then stored in the reclaimed water storage tank; the sea sand desalination and desalination system at least comprises a sea sand inactivation and membrane breaking system, an impurity removal vibration screen device, a first-stage sand washer, a second-stage sand washer and a third-stage sand washer which are sequentially arranged, wherein the first-stage sand washer is connected with the reclaimed water tank, and the second-stage sand washer and the third-stage sand washer are respectively connected with the reclaimed water storage tank. The sea sand desalting device uses reclaimed water or seawater desalted water as a raw material to desalt sea sand, so that fresh water resources can be saved, and the sea sand desalting cost is reduced.
Description
Technical Field
The utility model relates to a sea sand desalination device.
Background
With the excessive exploitation of natural sandstone resources and the high importance of governments on ecological environment protection, in the years, the price of sandstone aggregates is in a violent trend, and in some areas, even the embarrassment that no sand can be bought occurs, so that many people begin to use sea sand to prepare concrete. However, the surface of the sea sand contains a large amount of chloride, so the sea sand contains a large amount of chloride ion components, which are seriously beyond the standard of the building sand, and when the sea sand is used for engineering construction, the sea sand can have serious corrosion action on reinforcing steel bars in concrete, and the structure of the reinforced concrete is damaged. In addition, sea sand also contains other harmful impurities, such as: shells, silt, mica, light substances, organic matters and sulfides. Shells, mica and light materials reduce the binding power of aggregates in concrete with cement and stones. Thus, the state mandates: the sea sand can not be directly used for prestressed concrete without desalting. Sea sand is the second ocean mineral product next to petroleum and natural gas, and if the sea sand is desalted and used, the contradiction between supply and demand of natural sandstone resources can be solved. In recent years, the desalination and desalination technology and application of sea sand are receiving great attention. In order to standardize the sea sand desalination utilization standard, according to the standard of construction sand (GB/T14684-2011) in China, the country promulgates the standard of purified sea sand for construction and municipal engineering (JG/T494-2016), and the standard is stipulated: the chloride ion content of the first-class sand used by the construction sand is not more than 0.001%, the chloride ion content of the second-class sand is not more than 0.005%, and the chloride ion content of the minimum required third-class sand is not more than 0.01%. At present, fresh water is mainly used for desalting sea sand, and the salt content of the sea sand is reduced to be below 0.001% through three-level washing and desalting (namely, first-level washing and desalting, second-level washing and desalting and third-level washing and desalting), so that the standard of 'sand for construction' is met. At present, most coastal areas in China are lack of fresh water resources. However, the reclaimed water and the seawater are abundant, so that the reclaimed water or the seawater can be used as a raw material for desalting the sea sand, which is a good choice. Therefore, there is an urgent need for an apparatus and method for desalinating sea sand using reclaimed water or seawater.
Disclosure of Invention
In order to solve the technical problem, an object of the utility model is to provide a sea sand desalination device.
The utility model discloses a following technical scheme realizes: a sea sand desalination device comprises a reclaimed water manufacturing system and a sea sand desalination and desalination system, wherein the reclaimed water manufacturing system at least comprises a reclaimed water pool, a reclaimed water purification and desalination system and a reclaimed water storage tank which are sequentially connected, and reclaimed water in the reclaimed water pool is treated by the reclaimed water purification and desalination system and then stored in the reclaimed water storage tank; the sea sand desalination and desalination system at least comprises a sea sand inactivation and membrane breaking system, an impurity removal vibration screen device, a first-stage sand washer, a second-stage sand washer and a third-stage sand washer which are sequentially arranged, wherein the first-stage sand washer is connected with the reclaimed water tank, and the second-stage sand washer and the third-stage sand washer are respectively connected with the reclaimed water storage tank.
Preferably, a water outlet of a third-stage sand washing wastewater collecting pool of the third-stage sand washing machine is communicated with the reclaimed water pool.
The preferred still includes effluent disposal system, effluent disposal system includes one-level and second grade washing sand wastewater sedimentation tank at least, tertiary washing sand wastewater sedimentation tank and tertiary washing sand wastewater collecting pit, one-level and second grade washing sand wastewater sedimentation tank connect in first-level washing sand machine and the delivery port of second grade washing sand machine, the water inlet of tertiary washing sand wastewater sedimentation tank then with the delivery port of third grade washing sand machine is connected, just tertiary washing sand wastewater sedimentation tank delivery port connect in tertiary washing sand wastewater collecting pit, the delivery port and the normal water pond of this tertiary washing sand wastewater collecting pit communicate each other.
Preferably, the sludge outlets of the first-stage and second-stage sand washing wastewater sedimentation tanks and the third-stage sand washing wastewater sedimentation tank are connected to a sludge tank, and the sludge tank is connected with a sludge dewatering device for dewatering into sludge blocks.
Preferably, the sludge dewatering device can be one of a centrifugal dehydrator, a plate-and-frame filter press, a stacked screw dehydrator or a bag dehydrator.
Preferably, the reclaimed water purification and desalination system comprises a pre-filtering device and a reverse osmosis system, the pre-filtering device comprises a first filtering device and a second filtering device, the first filtering device comprises a multi-media filter and an activated carbon filter which are sequentially connected with the reclaimed water tank, and the second filtering device is one of microfiltration, ultrafiltration, MBR (membrane bioreactor) or nanofiltration.
Preferably, a high-pressure pump is arranged between the reverse osmosis system and the pre-filtering device, and the working pressure of the high-pressure pump is 6-35 bar.
Preferably, the sea sand inactivation membrane-breaking system comprises an intermediate water tank, an electrolysis device and a sea sand membrane-breaking storage yard which are sequentially connected.
The utility model also provides a sea sand desalination device, which comprises a sea water desalination system and a sea sand desalination system, wherein the sea water desalination system at least comprises a sea water intake well, a sea water purification desalination system and a sea water desalination storage tank which are connected in sequence, and the sea water of the sea water intake well is processed by the sea water purification desalination system and then stored in the sea water desalination storage tank; the sea sand desalination and desalination system at least comprises a sea sand inactivation and membrane breaking system, an impurity removal vibrating screen device, a first-stage sand washer, a second-stage sand washer and a third-stage sand washer which are sequentially arranged, wherein the first-stage sand washer, the second-stage sand washer and the third-stage sand washer are respectively connected with the sea water desalination water storage tank.
Preferably, the seawater purification and desalination system comprises a seawater purification and disinfection device, a pre-filtering device and a seawater desalination device which are connected in sequence, and a water outlet of the seawater desalination device is connected with the seawater desalination storage tank.
Compared with the existing sea sand desalting device and method, the sea sand desalting device and method which take the reclaimed water or the seawater desalted water produced by the reclaimed water of the urban sewage treatment plant as the raw material have the following remarkable advantages:
1. the contradiction that the existing device and method need to use a large amount of fresh water resources, but China does not have a large amount of fresh water supply along the sea is solved, and water resource guarantee is provided for desalting a large amount of sea sand;
2. the problem of the use of reclaimed water in the existing municipal sewage treatment plant is solved, at present, the advanced treatment and the recycling of the sewage in the municipal sewage treatment plant are vigorously advocated by the nation, but the development of the industry is always puzzled by fully utilizing the reclaimed water;
3. the need of the national strategy of saving water resources is met. The total storage of global water is 13.86 hundred million km3, the sea water occupies 96.5%, the surface fresh water and the shallow underground fresh water which are available to human beings are only 0.79%, and the distribution is very uneven with the change of the territory and the season. The shortage of fresh water resources has become one of the three environmental problems of the 21 st century. China is a country with scarce water resources, people occupy one third of fresh water resources which are less than that of people in the world, and in order to realize a sustainable development strategy, save water and guarantee water resource supply, the country makes a water resource saving strategy, wherein the development of advanced treatment and recycling of municipal sewage is important for the national water resource saving strategy.
4. The sea sand desalting cost is reduced, the tap water is replaced by the reclaimed water of the urban sewage treatment plant, and the water cost can be saved by more than 1 yuan per ton of desalted sea sand.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a sea sand desalination apparatus according to a first embodiment of the present invention.
FIG. 2 is a flow chart of the production process of FIG. 1 of the present invention.
Fig. 3 is a schematic connection diagram of the reclaimed water producing system (at a in fig. 1).
FIG. 4 is a schematic connection diagram of a seawater desalination system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
First embodiment
Referring to the attached drawings 1 and 3 in the specification, the sea sand desalination device comprises a reclaimed water manufacturing system of an urban sewage plant and a sea sand desalination system:
the reclaimed water manufacturing system at least comprises a reclaimed water pool 11, a lift pump, a pre-filtering device and a reverse osmosis system 14, wherein the reclaimed water pool 11, the lift pump, the pre-filtering device and the reverse osmosis system 14 (or an ion exchange desalination system) are sequentially connected, and the water in the reclaimed water pool 11 is reclaimed water of a municipal sewage treatment plant. The pre-filtering device comprises a first filtering device 131 and a second filtering device 132, the first filtering device comprises a multi-medium filter a and an active carbon filter b which are sequentially connected with the reclaimed water tank 11, impurities such as silt, suspended matters and colloid in reclaimed water are removed in advance, the second filtering device 132 can be one of microfiltration, ultrafiltration, MBR (membrane bioreactor) or nanofiltration, wherein a membrane component of the microfiltration or ultrafiltration can be one of an organic membrane, a ceramic membrane or a metal membrane component, the nanofiltration is a roll-type membrane component, a membrane material of the nanofiltration membrane component is an acetate fiber membrane or a composite nanofiltration membrane in the organic membrane, the intercepted molecular weight of the membrane is 200-500 MWCO, the inlet pressure is 6.0-45.0 bar, and the outlet pressure is 4.5-43.5 bar, so that the impurities in the reclaimed water are further removed, and purified reclaimed water is obtained; the reverse osmosis system 14 is configured to filter the purified recycled water obtained by the pre-filtering apparatus through a cartridge filter c, and then pump the filtered recycled water into the reverse osmosis system 14 through a high-pressure pump 31 for filtration and desalination to obtain recycled water and concentrated water with a chloride ion content less than or equal to 1.5mg/L, the prepared recycled water is stored in a recycled water storage tank 32, the concentrated water is subjected to purification treatment through a treatment apparatus, the treatment apparatus can be composed of a concentrated water treatment unit and a coagulation precipitation unit, wherein the working pressure of the high-pressure pump 31 is as follows: 6-35 bar, the inlet pressure is 6.0-45.0 bar, the outlet pressure is 4.5-35 bar, the membrane component of the reverse osmosis system 14 is a roll-type membrane component, the membrane material is an acetate fiber membrane or a composite membrane in an organic membrane, the molecular weight cutoff is 50-200 MWCO, and the rejection rate of sodium chloride is greater than or equal to 99.5%.
The sea sand desalination and desalination system at least comprises a sea sand inactivation and membrane breaking system 21, an impurity removal vibrating screen device 22, a first-stage sand washer 23, a second-stage sand washer 24, a third-stage sand washer 25 and a wastewater treatment system which are sequentially arranged, wherein the sea sand inactivation and membrane breaking system 21 comprises an intermediate water tank 21a, an electrolysis device 21b and a sea sand membrane breaking yard 21c which are sequentially connected, wherein water in the intermediate water tank 21a is preferably reclaimed water or seawater, the intermediate water tank and the reclaimed water tank can share the same water tank, water in the intermediate water tank 21a can be lifted to the electrolysis device 21b by a lifting pump for electrolysis, a membrane breaking agent (hypochlorous acid solution) is generated through electrolysis, and finally water containing hypochlorous acid after electrolysis is sprayed onto sea sand in the sea sand membrane breaking yard 21 c; the first-stage sand washer 23, the second-stage sand washer 24 and the third-stage sand washer 25 are stirred and washed by a first stirring washer, a second stirring washer and a third stirring washer respectively to improve the sea sand desalting effect, the first-stage sand washer 23 is connected with the reclaimed water tank 11, and the second-stage sand washer 24 and the third-stage sand washer 25 are connected with a reclaimed water storage tank 32 respectively; this effluent disposal system includes one-level and second grade washed-out sand waste water sedimentation tank at least, tertiary washed-out sand waste water sedimentation tank and tertiary washed-out sand waste water collecting pit, this one-level and second grade washed-out sand waste water sedimentation tank connect in this first level washed-out sand machine 23 and second grade washed-out sand machine 24's delivery port, this tertiary washed-out sand waste water sedimentation tank's water inlet then is connected with third grade washed-out sand machine 25's delivery port, and during water in the tertiary washed-out sand waste water sedimentation tank finally flowed into this tertiary washed-out sand waste water collecting pit, the preferred, this tertiary washed-out sand waste water collecting pit's delivery port can connect in normal water pond 11, further reuse, and resources are saved. Further, the mud exit linkage in a sludge impoundment of this one-level and second grade washed-out sand waste water sedimentation tank and tertiary washed-out sand waste water sedimentation tank, this sludge impoundment and a sludge dewatering device are connected and are dehydrated into the mud piece, and the preferred, this sludge dewatering device can be centrifugal dehydrator, plate and frame filter press, fold spiral shell hydroextractor or the one kind of pocket type hydroextractor.
The following will describe the implementation steps of desalinating sea sand by using the water in the municipal sewage plant, and the steps are as follows:
(1) preparing regenerated water: the reclaimed water of the municipal sewage treatment plant is sequentially filtered by a first filtering device 131 and a second filtering device 132 of a pre-filtering device, and then the pre-filtered water enters a reverse osmosis system 14 (or an ion exchange desalination system) for desalination to obtain regenerated water with the chloride ion content of less than 1.5mg/L, and the regenerated water is stored in a regenerated water storage tank 32;
(2) sea sand inactivation and membrane rupture
Lifting the water in the intermediate water tank 21a to an electrolysis device 21b by using a lift pump for electrolysis, generating a film breaking agent (hypochlorous acid solution) by electrolysis, spraying the water containing the film breaking agent after the electrolysis onto the sea sand in a sea sand film breaking storage yard 21c, killing microorganisms in the sea sand by using the film breaking agent, and stacking for 8-24 hours to ensure that the biological film on the surface of the sea sand is subjected to film melting and breaking;
(3) sieving to remove impurities: conveying the sea sand subjected to membrane rupture treatment to an impurity removal vibrating screen device 22 through a feeding machine and a conveying belt, and removing shells and gravels in the impurity removal vibrating screen device 22 by using a vibrating screen;
(4) cleaning: the screened sand enters a first-stage sand washer 23 through a hopper, the mortar in the first-stage sand washer 23 is cleaned for the first time by using reclaimed water in a reclaimed water pool 11 and reclaimed water cleaned by a third-stage sand washer 25 to remove slurry and desalt, the mortar cleaned for the first time enters a second-stage sand washer 24, the mortar cleaned for the second time is cleaned and desalted by using reclaimed water in a reclaimed water storage tank 32, the mortar cleaned for the second time enters the third-stage sand washer 25, meanwhile, the reclaimed water in the reclaimed water storage tank 32 is cleaned for the third time to desalt to obtain finished product desalted sea sand, and finally the finished product desalted sea sand is conveyed to a finished product storage yard through a conveying belt, wherein the chloride ion content of the finished product desalted sea sand is less than 0.001-0.003% (weight percentage).
Preferably, the sea sand desalination also comprises a wastewater treatment step, wherein the wastewater treatment is to discharge the mud-containing wastewater obtained by cleaning the sea sand for the first time and cleaning the sea sand for the second time after the mud-containing wastewater is precipitated in a primary sand-washing wastewater precipitation tank and a secondary sand-washing wastewater precipitation tank; and the muddy wastewater for cleaning the sea sand for the third time enters a third-level sand washing wastewater collection tank after being precipitated and purified by a third-level sand washing wastewater sedimentation tank, and the wastewater in the third-level sand washing wastewater collection tank is combined with the reclaimed water to be used as a water source for cleaning the sea sand for the first time, so that the muddy wastewater is further recycled, the resources are saved, and the cost is reduced.
Preferably, the sea sand desalination also comprises a sludge dewatering step, wherein the sludge dewatering step is to dewater the slurry into a sludge block through a sludge dewatering device after the slurry is concentrated by a concentration tank, and the sludge dewatering device can be a centrifugal dehydrator, a plate-and-frame filter press, a stacked spiral dehydrator or a bag type dehydrator.
The detection conditions were as follows:
in the first case: according to detection, at the beginning, if the salt content of the sea sand is less than or equal to 650 mg/kg, the chloride ion content of the reclaimed water during the first washing desalination is less than or equal to 150mg/L, and the water consumption of the reclaimed water is 70% of the weight of the sea sand, and after the first washing desalination, the chloride ion content of the sea sand is less than or equal to 120 mg/kg; the consumption of the reclaimed water for washing the sea sand for the second time is 25% of the weight of the sea sand, and after the sea sand is washed and desalted for the second time, the content of chloride ions in the sea sand is less than or equal to 40 mg/kg; the consumption of the reclaimed water for washing the sea sand for the third time is 30% of the weight of the sea sand, and after the sea sand is washed and desalted for the third time, the content of chloride ions in the sea sand is less than or equal to 30 mg/kg.
In the second case: according to detection, at the beginning, if the salt content of the sea sand is less than or equal to 457 mg/kg, the chloride ion content of the reclaimed water is less than or equal to 10mg/L and the water consumption of the reclaimed water is 40% of the weight of the sea sand during the first washing desalination, and after the first washing desalination, the chloride ion content of the sea sand is less than or equal to 90 mg/kg; the consumption of the reclaimed water for washing the sea sand for the second time is 40% of the weight of the sea sand, and after the sea sand is washed and desalted for the second time, the content of chloride ions in the sea sand is less than or equal to 38 mg/kg; the consumption of the reclaimed water for washing the sea sand for the third time is 50% of the weight of the sea sand, and after the sea sand is washed and desalted for the third time, the content of chloride ions in the sea sand is less than or equal to 10 mg/kg.
In the third case: according to detection, at the beginning, if the salt content of the sea sand is less than or equal to 390 mg/kg, and during the first washing desalination, the chloride ion content of the reclaimed water is less than or equal to 150mg/L, and the water consumption of the reclaimed water is 60% of the weight of the sea sand, after the first washing desalination, the chloride ion content of the sea sand is less than or equal to 75 mg/kg; the consumption of the reclaimed water for washing the sea sand for the second time is 30% of the weight of the sea sand, and after the sea sand is washed and desalted for the second time, the content of chloride ions in the sea sand is less than or equal to 31 mg/kg; the consumption of the reclaimed water for washing the sea sand for the third time is 40% of the weight of the sea sand, and after the sea sand is washed and desalted for the third time, the content of chloride ions in the sea sand is less than or equal to 10 mg/kg.
Second embodiment:
referring to the attached figure 4 of the specification, a sea sand desalination device using sea water desalination water as raw materials comprises a sea water desalination system and a sea sand desalination system:
the seawater desalination system at least comprises a seawater intake well 11 ', a lift pump, a seawater purification and disinfection device, a pre-filtering device and a seawater desalination device 14' (such as a reverse osmosis filtering device); the seawater intake well 11 ', the lift pump, the seawater purification and disinfection device, the pre-filtering device and the seawater desalination device 14' are connected in sequence. The pre-filtering means 13 comprise a first filtering means 131 'and a second filtering means 132', the first filtering device comprises a multi-medium filter a 'and an active carbon filter b' which are sequentially connected with the reclaimed water pool 11, impurities such as silt, suspended matters, colloid and the like in reclaimed water are removed in advance, the second filtering device 132 ' can be one of micro-filtration, ultra-filtration or nano-filtration, the seawater desalination device 14 ' filters the water filtered by the pre-filtering device through a security filter and then pumps the water into the seawater desalination device 14 ' through a high-pressure pump 31 ' for filtering and desalination to obtain seawater desalination water and concentrated water, the prepared seawater desalination water is stored in the seawater desalination water storage tank 32 ', the concentrated water can be purified through a processing device, the working pressure of the high-pressure pump 31' is 45-60 bar, the inlet pressure is 45.0-60.0 bar, and the outlet pressure is 43-58 bar.
Referring to the attached drawing 1, the sea sand desalination and desalination system at least comprises a sea sand inactivation and membrane breaking system 21, an impurity removal vibrating screen device 22, a first-stage sand washer 23, a second-stage sand washer 24, a third-stage sand washer 25 and a wastewater treatment system 26 which are sequentially arranged, wherein the sea sand inactivation and membrane breaking system 21 comprises an intermediate water tank 21a, an electrolysis device 21b and a sea sand membrane breaking yard 21c which are sequentially connected, wherein water in the intermediate water tank 21a is preferably regenerated water or seawater, water in the intermediate water tank 21a can be lifted to the electrolysis device 21b by a lifting pump for electrolysis, a membrane breaking agent (hypochlorous acid solution) is generated through electrolysis, and finally water containing hypochlorous acid after electrolysis is sprayed on the sea sand in the sea sand membrane breaking yard 21 c; this first level sand washer 23, second level sand washer 24 and third level sand washer 25 utilize first stirring washer, second stirring washer and third stirring washer respectively to stir and wash, improve the sea sand desalination effect. The seawater desalination water storage tank 32' is respectively connected with the first-stage sand washer 23, the second-stage sand washer 24 and the third-stage sand washer 25; this effluent disposal system includes one-level and second grade washed-out sand waste water sedimentation tank at least, tertiary washed-out sand waste water sedimentation tank and tertiary washed-out sand waste water collecting pit, this one-level and second grade washed-out sand waste water sedimentation tank connect in this first level washed-out sand machine 23 and second grade washed-out sand machine 24's delivery port, this tertiary washed-out sand waste water sedimentation tank's water inlet then is connected with tertiary washed-out sand machine 25's delivery port, and water in the tertiary washed-out sand waste water sedimentation tank finally flows into in this tertiary washed-out sand waste water collecting pit, the preferred, this tertiary washed-out sand waste water collecting pit's delivery port can connect in the normal water pond, further reuse, resources are saved. The mud exit linkage in a sludge impoundment of this one-level and second grade washed-out sand wastewater sedimentation tank and tertiary washed-out sand wastewater sedimentation tank, this sludge impoundment and a sludge dewatering device are connected and are dehydrated into the mud piece, and the preferred, this sludge dewatering device can be centrifugal dehydrator, plate and frame filter press, fold spiral shell hydroextractor or the kind of pocket type hydroextractor.
The following will describe the implementation steps of desalinating sea sand by using desalinated sea water, and the steps are as follows:
(1) preparing seawater desalted water: after the seawater is purified and disinfected by a lift pump and a seawater purification and disinfection device, the seawater is sequentially filtered by a first filtering device 131 'and a second filtering device 132' of a pre-filtering device, then the pre-filtered water enters a seawater desalination device 14 'for desalination to obtain seawater desalination water with the chloride ion content of less than 1mg/L, and the seawater desalination water is stored in a seawater desalination water storage tank 32';
(2) sea sand inactivation and membrane rupture
Lifting the water in the intermediate water tank 21a to an electrolysis device 21b by using a lift pump for electrolysis, generating a film breaking agent (hypochlorous acid solution) by electrolysis, spraying the water containing the film breaking agent after the electrolysis onto the sea sand in a sea sand film breaking storage yard 21c, killing microorganisms in the sea sand by using the film breaking agent, and stacking for 8-24 hours to ensure that the biological film on the surface of the sea sand is subjected to film melting and breaking;
(3) sieving to remove impurities: conveying the sea sand subjected to membrane rupture treatment to an impurity removal vibrating screen device 22 through a feeding machine and a conveying belt, and removing shells and gravels in the impurity removal vibrating screen device 22 by using a vibrating screen;
(4) cleaning: the screened sand enters a first-stage sand washer 23 through a hopper, the mortar in the first-stage sand washer 23 is cleaned for the first time by using the desalted water in a seawater desalted water storage tank 32 ' and the recovered water cleaned by a third-stage sand washer 25 to remove mud and desalt, the mortar cleaned for the first time enters a second-stage sand washer 24, the desalted water in the seawater desalted water storage tank 32 ' is cleaned for the second time and desalt, the mortar cleaned for the second time enters the third-stage sand washer 25, meanwhile, the desalted water in the seawater desalted water storage tank 32 ' is cleaned for the third time to desalt to obtain the finished product desalted sea sand, and finally the finished product desalted sea sand is conveyed to a finished product storage yard through a conveyor belt, wherein the chloride ion content of the finished product desalted sea sand is less than 0.001-0..
Preferably, the sea sand desalination also comprises a wastewater treatment step, wherein the wastewater treatment is to discharge the mud-containing wastewater obtained by cleaning the sea sand for the first time and cleaning the sea sand for the second time after the mud-containing wastewater is precipitated in a primary sand-washing wastewater precipitation tank and a secondary sand-washing wastewater precipitation tank; and the muddy wastewater for cleaning the sea sand for the third time enters a third-level sand washing wastewater collection tank after being precipitated and purified by a third-level sand washing wastewater sedimentation tank, and the wastewater in the third-level sand washing wastewater collection tank is combined with the reclaimed water to be used as a water source for cleaning the sea sand for the first time by utilizing the reclaimed water, so that the muddy wastewater is further recycled, the resources are saved, and the cost is reduced.
Preferably, the sea sand desalination also comprises a sludge dewatering step, wherein the sludge dewatering step is to dewater the slurry into a sludge block through a sludge dewatering device after the slurry is concentrated by a concentration tank, and the sludge dewatering device can be a centrifugal dehydrator, a plate-and-frame filter press, a stacked spiral dehydrator or a bag type dehydrator.
The detection conditions were as follows:
in the first case: according to detection, if the salt content of the sea sand is less than or equal to 600 mg/kg, the chloride ion content of the desalinated water is less than or equal to 20mg/L during the first washing and desalting, the water consumption of the desalinated water is 70% of the weight of the sea sand, and after the first washing and desalting, the chloride ion content of the sea sand is less than or equal to 110 mg/kg; the consumption of the desalted water for washing the sea sand for the second time is 25% of the weight of the sea sand, and after the sea sand is washed and desalted for the second time, the content of chloride ions in the sea sand is less than or equal to 40 mg/kg; the consumption of desalted water for washing the sea sand for the third time is 30% of the weight of the sea sand, and after the sea sand is washed and desalted for the third time, the content of chloride ions in the sea sand is less than or equal to 30 mg/kg.
In the second case: according to detection, if the salt content of the sea sand is less than or equal to 500 mg/kg, the chloride ion content of the desalinated water is less than or equal to 18mg/L during the first washing and desalting, the water consumption of the desalinated water is 70% of the weight of the sea sand, and after the first washing and desalting, the chloride ion content of the sea sand is less than or equal to 83 mg/kg; the consumption of the desalted water for washing the sea sand for the second time is 40% of the weight of the sea sand, and after the sea sand is washed and desalted for the second time, the content of chloride ions in the sea sand is less than or equal to 29 mg/kg; the consumption of desalted water for washing the sea sand for the third time is 50% of the weight of the sea sand, and after the sea sand is washed and desalted for the third time, the content of chloride ions in the sea sand is less than or equal to 10 mg/kg.
In the third case: according to detection, if the salt content of the sea sand is less than or equal to 375 mg/kg, the chloride ion content of the desalinated water is less than or equal to 15mg/L during the first washing and desalting, the water consumption of the desalinated water is 60% of the weight of the sea sand, and after the first washing and desalting, the chloride ion content of the sea sand is less than or equal to 87 mg/kg; the consumption of the desalted water for washing the sea sand for the second time is 30% of the weight of the sea sand, and after the sea sand is washed and desalted for the second time, the content of chloride ions in the sea sand is less than or equal to 32 mg/kg; the consumption of desalted water for washing the sea sand for the third time is 40% of the weight of the sea sand, and after the sea sand is washed and desalted for the third time, the content of chloride ions in the sea sand is less than or equal to 10 mg/kg.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (10)
1. A sea sand desalination device is characterized by comprising a reclaimed water manufacturing system and a sea sand desalination system, wherein the reclaimed water manufacturing system at least comprises a reclaimed water pool, a reclaimed water purification desalination system and a reclaimed water storage tank which are sequentially connected, and reclaimed water in the reclaimed water pool is treated by the reclaimed water purification desalination system and then stored in the reclaimed water storage tank;
the sea sand desalination and desalination system at least comprises a sea sand inactivation and membrane breaking system, an impurity removal vibration screen device, a first-stage sand washer, a second-stage sand washer and a third-stage sand washer which are sequentially arranged, wherein the first-stage sand washer is connected with the reclaimed water tank, and the second-stage sand washer and the third-stage sand washer are respectively connected with the reclaimed water storage tank.
2. The sea sand desalination device of claim 1, wherein a water outlet of a tertiary sand washing wastewater collection tank of the third-stage sand washing machine is communicated with the reclaimed water tank.
3. The sea sand desalination device of claim 2, characterized in that, still includes waste water treatment system, waste water treatment system includes one-level and second grade washing waste water sedimentation tank, tertiary washing waste water sedimentation tank and tertiary washing waste water collecting pit, one-level and second grade washing waste water sedimentation tank connect in first-level washing machine and the delivery port of second grade washing machine, the water inlet of tertiary washing waste water sedimentation tank then with the delivery port of third grade washing machine is connected, just tertiary washing waste water sedimentation tank delivery port connect in tertiary washing waste water collecting pit, the delivery port and the normal water pond of this tertiary washing waste water collecting pit communicate each other.
4. The sea sand desalination plant of claim 3, wherein the sludge outlets of the primary and secondary sand washing wastewater sedimentation tanks and the tertiary sand washing wastewater sedimentation tank are connected to a sludge tank, and the sludge tank is connected to a sludge dewatering device for dewatering into sludge blocks.
5. The sea sand desalination device of claim 4, wherein the sludge dewatering device is one of a centrifugal dehydrator, a plate-and-frame filter press, a stacked screw dehydrator or a bag dehydrator.
6. The sea sand desalination device of claim 1, wherein the reclaimed water purification desalination system comprises a pre-filtration device and a reverse osmosis system, the pre-filtration device comprises a first filtration device and a second filtration device, the first filtration device comprises a multi-media filter and an activated carbon filter which are sequentially connected with the reclaimed water pool, and the second filtration device is one of microfiltration, ultrafiltration, MBR or nanofiltration.
7. The sea sand desalination device of claim 6, wherein a high pressure pump is arranged between the reverse osmosis system and the pre-filtering device, and the working pressure of the high pressure pump is 6-35 bar.
8. The sea sand desalination device of claim 1, wherein the sea sand inactivation and membrane breaking system comprises an intermediate water tank, an electrolysis device and a sea sand membrane breaking storage yard which are connected in sequence.
9. A sea sand desalination device is characterized by comprising a sea water desalination system and a sea sand desalination system, wherein the sea water desalination system at least comprises a sea water taking well, a sea water purification desalination system and a sea water desalination storage tank which are sequentially connected, and sea water of the sea water taking well is treated by the sea water purification desalination system and then stored in the sea water desalination storage tank;
the sea sand desalination and desalination system at least comprises a sea sand inactivation and membrane breaking system, an impurity removal vibrating screen device, a first-stage sand washer, a second-stage sand washer and a third-stage sand washer which are sequentially arranged, wherein the first-stage sand washer, the second-stage sand washer and the third-stage sand washer are respectively connected with the sea water desalination water storage tank.
10. The sea sand desalination device of claim 9, wherein the sea water purification and desalination system comprises a sea water purification and disinfection device, a pre-filtering device and a sea water desalination device which are connected in sequence, and a water outlet of the sea water desalination device is connected to the sea water desalination tank.
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| CN201920833847.6U CN210103778U (en) | 2019-06-04 | 2019-06-04 | Sea sand desalination device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110156363A (en) * | 2019-06-04 | 2019-08-23 | 黄苏 | A kind of sea sand desalting device and method |
| CN111205007A (en) * | 2020-02-26 | 2020-05-29 | 广东新龙海洋装备科技有限公司 | Sea sand dechlorination equipment and sea sand dechlorination method |
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2019
- 2019-06-04 CN CN201920833847.6U patent/CN210103778U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110156363A (en) * | 2019-06-04 | 2019-08-23 | 黄苏 | A kind of sea sand desalting device and method |
| CN110156363B (en) * | 2019-06-04 | 2024-03-26 | 黄苏 | Sea sand desalination device and method |
| CN111205007A (en) * | 2020-02-26 | 2020-05-29 | 广东新龙海洋装备科技有限公司 | Sea sand dechlorination equipment and sea sand dechlorination method |
| CN111205007B (en) * | 2020-02-26 | 2023-09-22 | 广东新龙海洋装备科技有限公司 | Sea sand chlorine removal equipment and sea sand chlorine removal method |
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