CN203668163U - Device for nitrate removal by membrane method - Google Patents
Device for nitrate removal by membrane method Download PDFInfo
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- CN203668163U CN203668163U CN201320887031.4U CN201320887031U CN203668163U CN 203668163 U CN203668163 U CN 203668163U CN 201320887031 U CN201320887031 U CN 201320887031U CN 203668163 U CN203668163 U CN 203668163U
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- transfer lime
- sodium chloride
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Abstract
The utility model relates to the technical field of devices for nitrate removal by a membrane method in a salt primary brine purification process and relates to a device for nitrate removal by a membrane method. The device for nitrate removal by the membrane method comprises a pretreatment unit, a membrane treatment unit and a freezing and nitrate removing unit, wherein the membrane treatment unit is connected between the pretreatment unit and the freezing and nitrate removing unit; the pretreatment unit comprises a raw material brine tank and a light salt brine cooler, a freezing treatment unit comprises a recovered brine tank and a precooler, and a nitrate lacking loopback pipeline is fixedly mounted between the precooler and the raw material brine tank. The device provided by the utility model is reasonable and compact in structure, and convenient to use, in the utility model, through sending a clear liquid at the upper part of a nitrate sinking tank to a light salt brine buffer tank to be mixed with light salt brine from an ionic membrane and then enter into the pretreatment unit, the membrane treatment unit and the freezing and nitrate removing unit for treatment, during the using process of freezing and nitrate removing unit, after being collected, the clear liquid at the upper part of the nitrate sinking tank is sent to the light salt brine buffer tank, and repetitive cycle is performed. Therefore, the purposes of saving energy and lowering consumption, and improving nitrate removing capability, brine treatment capability and production capability can be achieved.
Description
Technical field
it, except nitre device technique field, is that a kind of embrane method is except nitre device that the utility model relates to embrane method in primary refined brine technique.
Background technology
in conventional embrane method technique of nitrate removal, as shown in Figure 2, be introduced into pretreatment unit from ionic membrane raw material light salt brine, in pretreatment unit, in light salt brine, add Na
2
sO
3
remove free chlorine to zero, and regulate PH, be cooled to processing requirement, remove after mechanical granule foreign, light salt brine after treatment is sent to film processing unit by high-pressure pump and recycle pump, utilize the characteristic of membrane sepn under certain operation condition, to carry out denitration membrane sepn, wherein to deliver to recovered brine groove as denitration salt solution stand-by for penetrating fluid, the film system that enters part concentrated solution (rich salt made from earth containing a comparatively high percentage of sodium chloride water) circulates concentrated, and a part of concentrated solution (rich salt made from earth containing a comparatively high percentage of sodium chloride water) is delivered to freezing denitration unit continuously in addition.Reclaim saltcake and the denitration salt solution in concentrated solution (rich salt made from earth containing a comparatively high percentage of sodium chloride water) by freezing denitration unit, denitration salt solution is stand-by by also delivering to recovered brine groove after pre-cooler recovery part cold.Concentrated solution (rich salt made from earth containing a comparatively high percentage of sodium chloride water) carries out Cooling capacity exchanging through pre-cooler and denitration salt solution, enter and convert halogen groove, it is freezing that part enters refrigerating evaporator, after cooling, return to convert and after halogen groove mixes with concentrated solution (rich salt made from earth containing a comparatively high percentage of sodium chloride water), enter heavy nitre groove sedimentation, some directly enters heavy nitre groove, heavy nitre groove bottom discharge enters cyclone separator and centrifuge dewatering, output sal glauberi, the denitration salt solution that heavy nitre groove upper clear supernate (denitration salt solution) and whizzer are deviate from returns to recovered brine groove with concentrated solution (rich salt made from earth containing a comparatively high percentage of sodium chloride water) heat exchange recovery cold after entering poor salt made from earth containing a comparatively high percentage of sodium chloride tank, denitration salt solution remnants in recovered brine groove change salt after exchanging with cold two of processing unit.But, in current this embrane method technique of nitrate removal, in heavy nitre groove upper clear supernate, still contain the sulfate ion higher than two to three times of raw material light salt brines, in follow-up change salt technique, general requirement is entered ρ (SO in groove salt solution
4
2-
)≤5g/L, if SO
4
2-
too high, will there will be following situation: 1, SO
4
2-
the too high chlorion that can hinder discharges, and water oxygen ionic discharge is produced oxygen, and not only causes oxygen amount in chlorine to rise, and because of SO
4
2-
too high levels, makes reaction aggravation, shortens anode work-ing life, also can make Faradaic current Efficiency Decreasing simultaneously; 2, when salt solution is containing SO
4
2-
too high levels, makes Na
2
sO
4
with NaCl together with NaOH at each position Precipitation of film, film useful area is reduced, local current densities raises, and affects conduction of current effect, causes electrolytic efficiency low; 3, due to Na
2
sO
4
deposition, form barrier film at conventionally more smooth film cathode surface, thereby reduce film to OH
-
oppositely the blocking capability of migration, causes electrolytic efficiency low.Therefore, adopt device as shown in Figure 2 to carry out denitration, have denitration ability, process salt solution ability and the low problem of throughput.
Summary of the invention
the utility model provides a kind of embrane method except nitre device, has overcome the deficiency of above-mentioned prior art, and it can effectively solve and adopt existing denitrification apparatus to carry out denitration to have denitration ability, process salt solution ability and the low problem of throughput.
the technical solution of the utility model realizes by following measures: a kind of embrane method, except nitre device, comprises pretreatment unit, film processing unit and freezing denitration unit; Between pretreatment unit and freezing denitration unit, be connected with film processing unit, pretreatment unit comprises raw material salt water pot and light salt brine water cooler, freezing treatment unit comprises recovered brine tank and pre-cooler, between pre-cooler and raw material salt water pot, be installed with poor nitre loopback pipeline, between recovered brine tank and light salt brine water cooler, be installed with recovered brine transfer lime, on recovered brine transfer lime, be installed with recovered brine transferpump.
the further optimization and/or improvements to above-mentioned utility model technical scheme below:
above-mentioned pretreatment unit also comprises light salt brine surge tank, feeding liquid strainer, qualified brine tank and cartridge filter, on light salt brine surge tank, be installed with respectively light salt brine water inlet pipe and light salt brine rising pipe, between light salt brine surge tank and raw material salt water pot, be installed with light salt brine transfer lime, between raw material salt water pot and light salt brine water cooler, be installed with light salt brine cooling tube, on light salt brine cooling tube, be installed with salt adding acid tube line, between light salt brine water cooler and light salt brine rising pipe, be installed with light salt brine cold water transfer lime, between light salt brine water cooler and feeding liquid strainer, be installed with and filter feed liquor pipeline, light salt brine cooling tube and filtration feed liquor pipeline are connected in light salt brine water cooler inside, recovered brine transfer lime and light salt brine cold water transfer lime are connected in light salt brine water cooler inside, between feeding liquid strainer and qualified brine tank, be installed with qualified salt solution transfer lime, between qualified brine tank and cartridge filter, be installed with depth type filtration liquid-inlet pipe, on depth type filtration liquid-inlet pipe, be installed with raw material salt water pump, film processing unit comprises membrane module, between cartridge filter and membrane module, be installed with into film brine tube, on film brine tube, be installed with successively high-pressure pump and recycle pump from cartridge filter to entering of membrane module, freezing denitration unit also comprises rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder, vaporizer, convert halogen groove, heavy nitre groove, cyclone separator, whizzer and poor salt made from earth containing a comparatively high percentage of sodium chloride tank, between membrane module and recovered brine tank, be installed with penetrating fluid transfer lime, between membrane module and rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder, be installed with concentrated solution transfer lime, be installed with circulation tube in entering between film brine tube and concentrated solution transfer lime between high-pressure pump and recycle pump, between rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder and pre-cooler, be installed with rich salt made from earth containing a comparatively high percentage of sodium chloride water composite cooling pipe, on rich salt made from earth containing a comparatively high percentage of sodium chloride water composite cooling pipe, be installed with rich salt made from earth containing a comparatively high percentage of sodium chloride water transferpump, at pre-cooler with convert and be installed with rich salt made from earth containing a comparatively high percentage of sodium chloride water-cooled water transfer lime between halogen groove, rich salt made from earth containing a comparatively high percentage of sodium chloride water composite cooling pipe and rich salt made from earth containing a comparatively high percentage of sodium chloride water-cooled water transfer lime are connected in pre-cooler inside, convert between the outlet of halogen groove and evaporator and be installed with evaporation transfer lime, on evaporation transfer lime, be installed with evaporation transferpump, evaporator outlet and convert between the import of halogen groove and be installed with and convert halogen transfer lime, between halogen groove and heavy nitre groove, be installed with heavy nitre transfer lime converting, between the top of heavy nitre tank and poor salt made from earth containing a comparatively high percentage of sodium chloride tank, be installed with heavy nitre supernatant liquor transfer lime, between the lower end of heavy nitre groove and cyclone separator, be installed with nitre slurry transfer lime, on nitre slurry transfer lime, be installed with nitre slurry transferpump, between the top of cyclone separator and heavy nitre groove, be installed with cyclonic separation supernatant liquor transfer lime, between cyclone separator lower end and whizzer, be installed with cyclonic separation nitre slurry transfer lime, between whizzer and poor salt made from earth containing a comparatively high percentage of sodium chloride tank, be installed with centrifugal clear liquid transfer lime, on whizzer, be also installed with saltcake vent pipe, between poor salt made from earth containing a comparatively high percentage of sodium chloride tank and pre-cooler, be installed with poor salt made from earth containing a comparatively high percentage of sodium chloride water transfer lime, on poor salt made from earth containing a comparatively high percentage of sodium chloride water transfer lime, be installed with poor salt made from earth containing a comparatively high percentage of sodium chloride water pump.
between the above-mentioned lower end at heavy nitre groove and poor salt made from earth containing a comparatively high percentage of sodium chloride tank, be installed with maintenance liquid discharge pipe, between the poor salt made from earth containing a comparatively high percentage of sodium chloride water transfer lime between poor salt made from earth containing a comparatively high percentage of sodium chloride water pump and pre-cooler and maintenance liquid discharge pipe, be installed with washpipe, between halogen transfer lime and heavy nitre groove, be installed with first heavy nitre liquid discharge pipe converting, at maintenance liquid discharge pipe, washpipe be installed with respectively control valve on heavy nitre liquid discharge pipe for the first time.
the utility model reasonable and compact in structure, easy to use, the utility model enters pretreatment unit, film processing unit and freezing denitration unit after light salt brine surge tank mixes with from the light salt brine of ionic membrane again and processes by the clear liquid on heavy nitre groove top is delivered to, in freezing denitration unit process, after again the clear liquid on heavy nitre groove top being collected, deliver in light salt brine surge tank and so carry out recirculation, realized target energy-saving and cost-reducing and raising denitration ability, processing salt outlet capacity and throughput.
Accompanying drawing explanation
accompanying drawing 1 is the process structure schematic diagram of the utility model most preferred embodiment.
accompanying drawing 2 is the process structure schematic diagram of existing embrane method except nitre device.
coding in accompanying drawing is respectively: 1 is raw material salt water pot, 2 is light salt brine water cooler, 3 is recovered brine tank, 4 is pre-cooler, 5 is poor nitre loopback pipeline, 6 is recovered brine transfer lime, 7 is recovered brine transferpump, 8 is light salt brine surge tank, 9 is feeding liquid strainer, 10 is qualified brine tank, 11 is cartridge filter, 12 is light salt brine water inlet pipe, 13 is light salt brine rising pipe, 14 is light salt brine transfer lime, 15 is light salt brine cooling tube, 16 is salt adding acid tube line, 17 is light salt brine cold water transfer lime, 18 for filtering feed liquor pipeline, 19 is qualified salt solution transfer lime, 20 is depth type filtration liquid-inlet pipe, 21 is raw material salt water pump, 22 is membrane module, 23 for entering film brine tube, 24 is high-pressure pump, 25 is recycle pump, 26 is rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder, 27 is vaporizer, 28 for converting halogen groove, 29 is heavy nitre groove, 30 is cyclone separator, 31 is whizzer, 32 is poor salt made from earth containing a comparatively high percentage of sodium chloride tank, 33 is penetrating fluid transfer lime, 34 is concentrated solution transfer lime, 35 is circulation tube, 36 is rich salt made from earth containing a comparatively high percentage of sodium chloride water composite cooling pipe, 37 is rich salt made from earth containing a comparatively high percentage of sodium chloride water transferpump, 38 is rich salt made from earth containing a comparatively high percentage of sodium chloride water-cooled water transfer lime, 39 is evaporation transfer lime, 40 is evaporation transferpump, 41 for converting halogen transfer lime, 42 is heavy nitre transfer lime, 43 is heavy nitre supernatant liquor transfer lime, 44 is nitre slurry transfer lime, 45 is nitre slurry transferpump, 46 is cyclonic separation supernatant liquor transfer lime, 47 is cyclonic separation nitre slurry transfer lime, 48 is centrifugal clear liquid transfer lime, 49 is saltcake vent pipe, 50 is poor salt made from earth containing a comparatively high percentage of sodium chloride water transfer lime, 51 is poor salt made from earth containing a comparatively high percentage of sodium chloride water pump, 52 is maintenance liquid discharge pipe, 53 is washpipe, 54 is first heavy nitre liquid discharge pipe, 55 is control valve.
Embodiment
the utility model is not subject to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and practical situation.
in the utility model, for convenience of description, the description of the relative position relation of each parts is to be all described according to the Butut mode of Figure of description 1, as: the position relationship of upper and lower, left and right etc. is to determine according to the Butut direction of Figure of description.
below in conjunction with embodiment and accompanying drawing, the utility model is further described:
as shown in Figure 1, this embrane method comprises pretreatment unit, film processing unit and freezing denitration unit except nitre device; Between pretreatment unit and freezing denitration unit, be connected with film processing unit, pretreatment unit comprises raw material salt water pot 1 and light salt brine water cooler 2, freezing treatment unit comprises recovered brine tank 3 and pre-cooler 4, between pre-cooler 4 and raw material salt water pot 1, be installed with poor nitre loopback pipeline 5, between recovered brine tank 3 and light salt brine water cooler 2, be installed with recovered brine transfer lime 6, on recovered brine transfer lime 6, be installed with recovered brine transferpump 7.The utility model enters pretreatment unit, film processing unit and freezing denitration unit after raw material salt water pot 1 mixes with from the light salt brine of ionic membrane again and processes by pre-cooler 4 clear liquid is out delivered to, in freezing denitration unit process, after clear liquid more out of pre-cooler 4 being collected, deliver to and in raw material salt water pot 1, so carry out recirculation, it can effectively solve and adopt existing denitrification apparatus to carry out denitration to have denitration ability, process salt solution ability and the low problem of throughput.The utility model has been optimized production technique circuit, has realized target energy-saving and cost-reducing and raising throughput.
can according to actual needs, above-mentioned embrane method be removed to nitre device and make further optimization and/or improvements:
as shown in Figure 1, pretreatment unit also comprises light salt brine surge tank 8, feeding liquid strainer 9, qualified brine tank 10 and cartridge filter 11, on light salt brine surge tank 8, be installed with respectively light salt brine water inlet pipe 12 and light salt brine rising pipe 13, between light salt brine surge tank 8 and raw material salt water pot 1, be installed with light salt brine transfer lime 14, between raw material salt water pot 1 and light salt brine water cooler 2, be installed with light salt brine cooling tube 15, on light salt brine cooling tube 15, be installed with salt adding acid tube line 16, between light salt brine water cooler 2 and light salt brine rising pipe 13, be installed with light salt brine cold water transfer lime 17, between light salt brine water cooler 2 and feeding liquid strainer 9, be installed with and filter feed liquor pipeline 18, light salt brine cooling tube 15 and filtration feed liquor pipeline 18 are connected in light salt brine water cooler 2 inside, recovered brine transfer lime 6 and light salt brine cold water transfer lime 17 are connected in light salt brine water cooler 2 inside, between feeding liquid strainer 9 and qualified brine tank 10, be installed with qualified salt solution transfer lime 19, between qualified brine tank 10 and cartridge filter 11, be installed with depth type filtration liquid-inlet pipe 20, on depth type filtration liquid-inlet pipe 20, be installed with raw material salt water pump 21, film processing unit comprises membrane module 22, between cartridge filter 11 and membrane module 22, be installed with into film brine tube 23, on film brine tube 23, be installed with successively high-pressure pump 24 and recycle pump 25 from cartridge filter 11 to entering of membrane module 22, freezing denitration unit also comprises rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder 26, vaporizer 27, convert halogen groove 28, heavy nitre groove 29, cyclone separator 30, whizzer 31 and poor salt made from earth containing a comparatively high percentage of sodium chloride tank 32, between membrane module 22 and recovered brine tank 3, be installed with penetrating fluid transfer lime 33, between membrane module 22 and rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder 26, be installed with concentrated solution transfer lime 34, be installed with circulation tube 35 in entering between film brine tube 23 and concentrated solution transfer lime 34 between high-pressure pump 24 and recycle pump 25, between rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder 26 and pre-cooler 4, be installed with rich salt made from earth containing a comparatively high percentage of sodium chloride water composite cooling pipe 36, on rich salt made from earth containing a comparatively high percentage of sodium chloride water composite cooling pipe 36, be installed with rich salt made from earth containing a comparatively high percentage of sodium chloride water transferpump 37, at pre-cooler 4 with convert and be installed with rich salt made from earth containing a comparatively high percentage of sodium chloride water-cooled water transfer lime 38 between halogen groove 28, rich salt made from earth containing a comparatively high percentage of sodium chloride water composite cooling pipe 36 and rich salt made from earth containing a comparatively high percentage of sodium chloride water-cooled water transfer lime 38 are connected in pre-cooler 4 inside, convert between 28 outlets of halogen groove and vaporizer 27 imports and be installed with evaporation transfer lime 39, on evaporation transfer lime 39, be installed with evaporation transferpump 40, vaporizer 27 exports and converts between 28 imports of halogen groove and is installed with and converts halogen transfer lime 41, between halogen groove 28 and heavy nitre groove 29, be installed with heavy nitre transfer lime 42 converting, between the top of heavy nitre tank 29 and poor salt made from earth containing a comparatively high percentage of sodium chloride tank 32, be installed with heavy nitre supernatant liquor transfer lime 43, between the lower end of heavy nitre groove 29 and cyclone separator 30, be installed with nitre slurry transfer lime 44, on nitre slurry transfer lime 44, be installed with nitre slurry transferpump 45, between the top of cyclone separator 30 and heavy nitre groove 29, be installed with cyclonic separation supernatant liquor transfer lime 46, between cyclone separator 30 lower ends and whizzer 31, be installed with cyclonic separation nitre slurry transfer lime 47, between whizzer 31 and poor salt made from earth containing a comparatively high percentage of sodium chloride tank 32, be installed with centrifugal clear liquid transfer lime 48, on whizzer 31, be also installed with saltcake vent pipe 49, between poor salt made from earth containing a comparatively high percentage of sodium chloride tank 32 and pre-cooler 4, be installed with poor salt made from earth containing a comparatively high percentage of sodium chloride water transfer lime 50, on poor salt made from earth containing a comparatively high percentage of sodium chloride water transfer lime 50, be installed with poor salt made from earth containing a comparatively high percentage of sodium chloride water pump 51.If to mixing with the incoming stock brine tank of clear liquid on heavy nitre groove top after S-WAT in the light salt brine from ionic membrane, after mixing, add hydrochloric acid to adjust pH value, adjust after pH value, send in light salt brine water cooler, carry out tentatively cooling, then remove large granular impurity through feeding liquid strainer, qualified salt solution is sent in qualified brine tank, send into and in cartridge filter, carry out secondary filter and remove small-particle impurity substances through raw material salt water pump again, then send into and in membrane module, carry out membrane sepn through high-pressure pump and recycle pump, penetrating fluid is sent in recovered brine tank, a concentrated solution part is delivered to rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder, before a part is delivered to recycle pump, continuation participation loops film processing, penetrating fluid in recovered brine tank through recovered brine transferpump deliver in light salt brine water cooler with raw material salt water pot in salt solution participate in Cooling capacity exchanging, penetrating fluid after Cooling capacity exchanging is delivered to the external world after mixing from the light salt brine of ionic membrane with part, concentrated solution in rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder is sent into and is converted in halogen groove after pre-cooler is cooling, then send in vaporizer further cooling, be back to convert after mixing with by pre-cooler rich salt made from earth containing a comparatively high percentage of sodium chloride water after treatment in halogen groove through cooled rich salt made from earth containing a comparatively high percentage of sodium chloride water and deliver to heavy nitre groove, salt made from earth containing a comparatively high percentage of sodium chloride water under static state carries out solid-liquid separation in heavy nitre groove, upper clear supernate in heavy nitre groove is delivered in poor salt made from earth containing a comparatively high percentage of sodium chloride water pot, the nitre slurry of heavy nitre groove bottom is sent into and in cyclone separator, is carried out cyclonic separation through nitre slurry transferpump, upper clear supernate in cyclone separator continues to be back in heavy nitre groove, bottom nitre slurry obtains saltcake through the centrifugation of whizzer, clear liquid after centrifugation is delivered in poor salt made from earth containing a comparatively high percentage of sodium chloride tank, clear liquid in poor salt made from earth containing a comparatively high percentage of sodium chloride tank is delivered in pre-cooler and is participated in Cooling capacity exchanging with rich salt made from earth containing a comparatively high percentage of sodium chloride water by poor salt made from earth containing a comparatively high percentage of sodium chloride water pump, clear liquid after Cooling capacity exchanging is delivered in raw material salt tank.The utility model enters pretreatment unit, film processing unit and freezing denitration unit after raw material salt water pot mixes with from the light salt brine of ionic membrane again and processes by the clear liquid on heavy nitre groove top is delivered to, in freezing denitration unit process, after the clear liquid on heavy nitre groove top being collected, deliver to again and in raw material salt water pot, so carry out recirculation, it can effectively solve and adopt existing denitrification apparatus to carry out denitration to have denitration ability, process salt solution ability and the low problem of throughput.The utility model has been optimized production technique circuit, has realized target energy-saving and cost-reducing and raising throughput.
as shown in Figure 1, between the lower end of heavy nitre groove 29 and poor salt made from earth containing a comparatively high percentage of sodium chloride tank 32, be installed with and overhaul liquid discharge pipe 52, between the poor salt made from earth containing a comparatively high percentage of sodium chloride water transfer lime 50 between poor salt made from earth containing a comparatively high percentage of sodium chloride water pump 51 and pre-cooler 4 and maintenance liquid discharge pipe 52, be installed with washpipe 53, between halogen transfer lime 41 and heavy nitre groove 29, be installed with first heavy nitre liquid discharge pipe 54 converting, at maintenance liquid discharge pipe 52, washpipe 53 be installed with respectively control valve 55 on heavy nitre liquid discharge pipe 54 for the first time.Maintenance liquid discharge pipe is in the time that heavy nitre groove overhauls, discharge the liquid in heavy nitre groove, washpipe is in the time overhauling liquid discharge pipe or the obstruction of nitre slurry transfer lime discharge, play the effect of bath, first heavy nitre liquid discharge pipe enters liquid to heavy nitre groove while driving for device and carries out work, after working properly, close the control valve on this pipeline.
adopting the utility model to carry out denitration carries out compared with denitration with adopting existing apparatus as shown in Figure 2, although the raw material that adopts the utility model to carry out denitration processing carries out few 24.6 m3/h that on average lacked of denitration from the light salt brine amount of ionic membrane than employing existing apparatus as shown in Figure 2, but the sodium sulfate that adopts the utility model to carry out the final output of denitration on average has more 233.095 Kg/h with the sodium sulfate that employing existing apparatus as shown in Figure 2 carries out the final output of denitration, compared with carrying out denitration with employing existing apparatus as shown in Figure 2, the ability that adopts the utility model to carry out denitration has improved 32.4%, the ability of processing salt solution has improved 28.54%, throughput has improved 24.96%, further illustrate and adopt the utility model to carry out denitration and can save energy and reduce the cost.
above technical characterictic has formed most preferred embodiment of the present utility model, and it has stronger adaptability and best implementation result, can increase and decrease according to actual needs non-essential technical characterictic, meets the demand of different situations.
Claims (3)
1. embrane method, except a nitre device, is characterized in that comprising pretreatment unit, film processing unit and freezing denitration unit; Between pretreatment unit and freezing denitration unit, be connected with film processing unit, pretreatment unit comprises raw material salt water pot and light salt brine water cooler, freezing treatment unit comprises recovered brine tank and pre-cooler, between pre-cooler and raw material salt water pot, be installed with poor nitre loopback pipeline, between recovered brine tank and light salt brine water cooler, be installed with recovered brine transfer lime, on recovered brine transfer lime, be installed with recovered brine transferpump.
2. embrane method according to claim 1 is except nitre device, it is characterized in that pretreatment unit also comprises light salt brine surge tank, feeding liquid strainer, qualified brine tank and cartridge filter, on light salt brine surge tank, be installed with respectively light salt brine water inlet pipe and light salt brine rising pipe, between light salt brine surge tank and raw material salt water pot, be installed with light salt brine transfer lime, between raw material salt water pot and light salt brine water cooler, be installed with light salt brine cooling tube, on light salt brine cooling tube, be installed with salt adding acid tube line, between light salt brine water cooler and light salt brine rising pipe, be installed with light salt brine cold water transfer lime, between light salt brine water cooler and feeding liquid strainer, be installed with and filter feed liquor pipeline, light salt brine cooling tube and filtration feed liquor pipeline are connected in light salt brine water cooler inside, recovered brine transfer lime and light salt brine cold water transfer lime are connected in light salt brine water cooler inside, between feeding liquid strainer and qualified brine tank, be installed with qualified salt solution transfer lime, between qualified brine tank and cartridge filter, be installed with depth type filtration liquid-inlet pipe, on depth type filtration liquid-inlet pipe, be installed with raw material salt water pump, film processing unit comprises membrane module, between cartridge filter and membrane module, be installed with into film brine tube, on film brine tube, be installed with successively high-pressure pump and recycle pump from cartridge filter to entering of membrane module, freezing denitration unit also comprises rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder, vaporizer, convert halogen groove, heavy nitre groove, cyclone separator, whizzer and poor salt made from earth containing a comparatively high percentage of sodium chloride tank, between membrane module and recovered brine tank, be installed with penetrating fluid transfer lime, between membrane module and rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder, be installed with concentrated solution transfer lime, be installed with circulation tube in entering between film brine tube and concentrated solution transfer lime between high-pressure pump and recycle pump, between rich salt made from earth containing a comparatively high percentage of sodium chloride water medial launder and pre-cooler, be installed with rich salt made from earth containing a comparatively high percentage of sodium chloride water composite cooling pipe, on rich salt made from earth containing a comparatively high percentage of sodium chloride water composite cooling pipe, be installed with rich salt made from earth containing a comparatively high percentage of sodium chloride water transferpump, at pre-cooler with convert and be installed with rich salt made from earth containing a comparatively high percentage of sodium chloride water-cooled water transfer lime between halogen groove, rich salt made from earth containing a comparatively high percentage of sodium chloride water composite cooling pipe and rich salt made from earth containing a comparatively high percentage of sodium chloride water-cooled water transfer lime are connected in pre-cooler inside, convert between the outlet of halogen groove and evaporator and be installed with evaporation transfer lime, on evaporation transfer lime, be installed with evaporation transferpump, evaporator outlet and convert between the import of halogen groove and be installed with and convert halogen transfer lime, between halogen groove and heavy nitre groove, be installed with heavy nitre transfer lime converting, between the top of heavy nitre tank and poor salt made from earth containing a comparatively high percentage of sodium chloride tank, be installed with heavy nitre supernatant liquor transfer lime, between the lower end of heavy nitre groove and cyclone separator, be installed with nitre slurry transfer lime, on nitre slurry transfer lime, be installed with nitre slurry transferpump, between the top of cyclone separator and heavy nitre groove, be installed with cyclonic separation supernatant liquor transfer lime, between cyclone separator lower end and whizzer, be installed with cyclonic separation nitre slurry transfer lime, between whizzer and poor salt made from earth containing a comparatively high percentage of sodium chloride tank, be installed with centrifugal clear liquid transfer lime, on whizzer, be also installed with saltcake vent pipe, between poor salt made from earth containing a comparatively high percentage of sodium chloride tank and pre-cooler, be installed with poor salt made from earth containing a comparatively high percentage of sodium chloride water transfer lime, on poor salt made from earth containing a comparatively high percentage of sodium chloride water transfer lime, be installed with poor salt made from earth containing a comparatively high percentage of sodium chloride water pump.
3. embrane method according to claim 2 is except nitre device, it is characterized in that being installed with maintenance liquid discharge pipe between the lower end of heavy nitre groove and poor salt made from earth containing a comparatively high percentage of sodium chloride tank, between the poor salt made from earth containing a comparatively high percentage of sodium chloride water transfer lime between poor salt made from earth containing a comparatively high percentage of sodium chloride water pump and pre-cooler and maintenance liquid discharge pipe, be installed with washpipe, between halogen transfer lime and heavy nitre groove, be installed with first heavy nitre liquid discharge pipe converting, at maintenance liquid discharge pipe, washpipe be installed with respectively control valve on heavy nitre liquid discharge pipe for the first time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320887031.4U CN203668163U (en) | 2013-12-31 | 2013-12-31 | Device for nitrate removal by membrane method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320887031.4U CN203668163U (en) | 2013-12-31 | 2013-12-31 | Device for nitrate removal by membrane method |
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| Publication Number | Publication Date |
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| CN203668163U true CN203668163U (en) | 2014-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348665A (en) * | 2018-12-24 | 2020-06-30 | 新特能源股份有限公司 | Membrane method freezing denitration method and production device |
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2013
- 2013-12-31 CN CN201320887031.4U patent/CN203668163U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348665A (en) * | 2018-12-24 | 2020-06-30 | 新特能源股份有限公司 | Membrane method freezing denitration method and production device |
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