CN102249434A - Ultrahigh-recovery-rate waste water treatment process and concentrated water high-temperature reverse osmosis treatment equipment thereof - Google Patents
Ultrahigh-recovery-rate waste water treatment process and concentrated water high-temperature reverse osmosis treatment equipment thereof Download PDFInfo
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Abstract
The invention discloses an ultrahigh-recovery-rate waste water treatment process and concentrated water high-temperature reverse osmosis treatment equipment thereof. Specific to waste water which meets the reverse osmosis running requirement after pretreatment, the process is used for carrying out staged treatment according to different numerical values of total dissolved solids (TDS) concentration. The process comprises a raw water reverse osmosis (RO) process, a concentrated water reverse osmosis (CRO) process and a high-temperature reverse osmosis (HTRO) process which are performed in sequence. The concentrated water high-temperature reverse osmosis treatment equipment mainly comprises a concentrated water tank, a surface heat exchanger, a precision filter, a high-temperature reverse osmosis film device, an energy recovering device, a hyper-concentration waste water tank and a water purifying tank. After waste water is subjected to three times of reverse osmosis in sequence, the recovery rate of purified water can be greatly increased, the investment and running cost can be effectively lowered, and stable and safe running of a system can be ensured. As proved by testing, by adopting the invention, the weight of finally-separated concentrated water can be reduced to 2-5 percent of the total weight of the waste water, so that the investment and running cost of a subsequent waste water zero-drainage treatment system is greatly saved; and simultaneously, purified water which accounts for 95-98 percent of the total weight of the waste water is obtained, so that virtuous cycle of waste water is realized.
Description
Technical field
The present invention relates to the degree of depth recycling technology of trade effluent, refer to a kind of superelevation rate of recovery waste water treatment process and dense water high temperature reverse-osmosis treated equipment thereof particularly.
Background technology
In the recovery processing technique of industrial brine waste, reverse osmosis is extensively applied to industry-by-industries such as electric power, metallurgy, petrochemical industry, electronics as the world today's the most effective most advanced desalination mode, but utilizes its concentration process to extract the not high inside and outside question of common concern of industry that become of recovery levels that water purification relates to.For example certain brackish water (face of land river, lake, face of land water, underground water, factory's internal recycle water, handle the middle water of discharging etc.) enters clear water reverse-osmosis treated device after through series of preprocessing (comprising mixing, reaction, precipitation, cascade filtration, softening, absorption, decarburization, dosing adjusting etc.), its rate of recovery is mostly about 75%, i.e. 100 tons of feed water by reverse osmosis per hour, the product fresh water that obtains is about 75 tons, and the condensed water that also has salinity to concentrate is regarded as discharge of wastewater for 25 tons and has fallen.A large amount of dischargings of this condensed water make systematic running cost high, also are considered to be a kind of high energy consumption.
Raising along with industrial expansion and living standards of the people, the scarcity of water resources and pollution have become the two large problems that the mankind press for solution, wherein the recycling to trade effluent seems more and more important, and it is inside and outside to the requirement of clear water reverse osmosis as elementary desalting plant that about 75% the low rate of recovery can not satisfy industry.This concentrated field that is desirably in special solutes such as northern China water-deficient area, middle water reuse field, wastewater zero discharge ZLD system and fruit juice, medicine to high-recovery is particularly outstanding, and the rate of recovery that how to improve reverse osmosis is the problem that vast water treatment scientific research personnel pays close attention to always.
In order to address the above problem, the scientific research personnel designs the two-part technology that has adopted former water reverse osmosis (RO) and dense water reverse osmosis CRO and concentrates pollutents such as salt in the waste water, perhaps adopt the dense water reverse osmosis of the multistage that forms by both merging MCRO technology to separate pollutants in waste water, but be subjected to the restriction of self reverse-osmosis membrane element structure etc., the raising degree of its trade effluent rate of recovery is little, and great majority are about 85%.Because an isolated condensed water saltiness is very high, if reuse dense water reverse osmosis CRO treatment process, the pressure rating that then can exceed its reverse-osmosis membrane element requires (the highest 83Bar) and produces safety problem, and meeting in service produces the difficulty soluble salt contamination phenomenon, so still there is the condensed water of carrying energy in a large number to be emitted in vain.
Along with going deep into of research, the scientific research personnel has released the higher efficient reverse osmosis HERO technology of waste water reclamation rate in recent years, and has used high temperature reverse osmosis HTRO technology under the very high situation of only a few industrial media viscosity.
Efficient reverse osmosis HERO technology can be brought up to the waste water reclamation rate degree near 90% by the improvement to the Wastewater Pretreatment flow process.But because its reverse osmosis membrane plus-pressure makes the mechanism of water molecules reverse osmosis have multiplicity and ambiguity, since coming out, design just failed well to be used always, particularly very unstable in the processing of power plant desulfurization waste water and wastewater from chemical industry, show reverse osmosis unit fast, the aspect such as matting is frequent, the membrane element contamination and plugging is serious that descends of exerting oneself.Frequent matting not only can cause the constantly soaring of cost of equipment maintenance and human cost, but also the stability and the security of its process system operation constituted a latent danger.
High temperature reverse osmosis HTRO technology has the resistance to crocking height, working pressure is low, the tolerable temperature height, operation pH value scope is wide, characteristics such as organism and difficulty soluble salt resolution height, can handle the high strong brine of saltiness high (total dissolved solidss 30000-80000ppm), but because it need use expensive high temperature reverse-osmosis membrane element, and the pump supporting with it, pipeline, the pressure rating of container and corrosion-resistant class requirement thereof are all high, so the manufacturing expense of equipment is very high, simultaneously also because its reverse osmosis desalination rate under hot operation low relatively (having only 95%), make its product water water quality relatively poor relatively, these make it only limit to the high only a few small reverse osmosis of dielectric viscosity in the past and concentrate occasion, fail to obtain to utilize on waste water reclamation is handled always.When implementing wastewater zero discharge, the highest can only the reaching about 90% of the rate of recovery of purifying waste water of dense water reverse osmosis CRO and efficient reverse osmosis HERO is so need the dense water yield of evaporative crystallization still very big.
Summary of the invention
Purpose of the present invention is exactly will design a kind ofly not only can significantly improve the waste water reclamation rate and can effectively reduce investment and running cost, guarantee superelevation rate of recovery waste water treatment process and the dense water high temperature reverse-osmosis treated equipment thereof that system is stable and safe simultaneously.
For achieving the above object, superelevation rate of recovery waste water treatment process provided by the present invention is the process of the waste water that reaches the reverse osmosis operating requirement through pre-treatment being carried out continuous separating treatment, and this technology comprises the steps:
1) reverse osmosis for the first time: to total dissolved solidss concentration is that the waste water of TDS≤10000ppm carries out former water reverse osmosis (RO) and handles, isolate dense water for the first time, the total dissolved solidss concentration of the control dense water first time is at 10000ppm＜TDS≤30000ppm, and the weight of dense water accounts for 20～30% of waste water gross weight for the first time.
2) reverse osmosis for the second time: to the isolated first time of institute dense water carry out dense water reverse osmosis CRO and handle, isolate dense water for the second time, the total dissolved solidss concentration of the control dense water second time is at 30000ppm＜TDS≤80000ppm, and the weight reduction of dense water is to 10～15% of the waste water gross weight for the second time.
3) reverse osmosis for the third time: to the isolated second time of institute dense water carry out high temperature reverse osmosis HTRO and handle, isolate dense for the third time water, the weight reduction of dense water is to 2～5% of the waste water gross weight for the third time, thereby obtains to account for the water purification of waste water gross weight 95～98%.
Further, this technology also comprises following treatment step:
4) dense water zero discharge: isolated dense for the third time water is carried out evaporative crystallization handle, the heating unit of evaporative crystallization is selected the one or more combination in vaporizer, crystallizer and the moisture eliminator for use, and the dry slag of gained is buried in the usual way.Because waste water is through concentrating and separating repeatedly, final isolated dense for the third time water is hyperconcentration level waste liquid, its total dissolved solidss concentration TDS reaches more than the 100000ppm, the dense water of this strand only accounts for 2～5% of waste water gross weight, so can be under the prerequisite of significantly saving evaporation crystallization equipment investment and working cost, waste water is thoroughly handled the degree of zero release, waste water is gone to zero to the pollution of environment, simultaneously recyclable again great amount of water resources.Perhaps, the isolated concentrated water drainage for the third time of institute is gone into spontaneous evaporation in the open-air evaporation pond.Perhaps, the isolated dense for the third time water of institute is used for coal storing or flushing coal ash etc., uses by the low cost benign cycle of dense water for the third time and realize zero release reaching the effect of achieving many things at one stroke.
Further, pressure P 1≤30bar, the 5 ℃≤T1 of temperature＜40 ℃ of described former water reverse osmosis (RO) processing; Pressure P 2≤70bar, 5 ℃≤T2 of temperature＜40 ℃ that described dense water reverse osmosis CRO handles; Pressure P 3≤60bar, 40 ℃≤T3 of temperature≤80 ℃ that described high temperature reverse osmosis HTRO handles.Wherein: the high temperature reverse osmosis HTRO in 40 ℃≤T3≤80 ℃ handles for temperature, molecule and ionic microscopic motion will aggravate in the dense water of high temperature, its solubility property is strengthened, most difficulty soluble salts will move to the dissolving direction, concentration difference phenomenon at high temperature membrane element influent side will weaken, and its antifouling property will be strengthened greatly; Owing to high temperature reverse-osmosis membrane element inherent characteristic, very small variation only can take place in its filtering accuracy under the high temperature simultaneously, to the ratio of desalinization influence little (being not less than 95%) of its high temperature reverse osmosis.In addition, under hot conditions, the penetrating quality of water molecules is strengthened and increasing slightly of membrane filtration layer inside nominal diameter will make the working pressure of device reduce, thereby not only can reduce plant energy consumption but also can guarantee to exert oneself unaffected.Peculiar advantage when these factors have been facilitated high temperature reverse-osmosis treated hc effluent just, it makes the reuse that further concentrates of hc effluent become reality.
As preferred parameter area, pressure 5bar≤P1≤30bar, 15 ℃≤T1 of temperature≤30 ℃ that described former water reverse osmosis (RO) is handled; Pressure 30bar≤P2≤70bar, 15 ℃≤T2 of temperature≤30 ℃ that described dense water reverse osmosis CRO handles; Pressure 20bar≤P3≤60bar, 60 ℃≤T3 of temperature≤80 ℃ that described high temperature reverse osmosis HTRO handles.
Again further, when described former water reverse osmosis (RO) is handled, the concentration N1 of the Scale inhibitors that in waste water, adds≤5ppm; When described dense water reverse osmosis CRO handles, the concentration N2≤2ppm of the Scale inhibitors that in dense water for the first time, adds; When described high temperature reverse osmosis HTRO handles, the concentration N3≤1ppm of the Scale inhibitors that in dense water for the second time, adds.Scale inhibitors has insoluble inorganic salt in the dispersion waste water, prevention or interference insoluble inorganic salt in the function of reverse osmosis membrane surface precipitation and fouling, can keep the good water permeability of reverse-osmosis membrane element.In the reverse osmosis membrane system water process, its waste water constantly is concentrated in the continuous output of water purification, wherein the concentration of difficulty soluble salt ion and organism etc. constantly raises, this makes them form dirt at the membrane element influent side easily, as precipitations such as lime carbonate, calcium sulfate, barium sulfate, Strontium Sulphate and ferric oxide, cause membrane element to stop up, can prevent the generation of this dirt or suppress its deposition growing by adding a certain amount of Scale inhibitors, thereby guarantee the safe operation of reverse osmosis equipment and prolong its matting cycle and work-ing life.Scale inhibitors commonly used has four kinds of natural polymer, phosphorous polymer, co-polymer and biodegradable green new polymerss etc., be divided into acid again and alkaline two types, such as polyacrylic acid is exactly wherein a kind of, and all kinds of Scale inhibitorss can be bought by professional production manufacturer and obtain.
The dense water high temperature reverse-osmosis treated equipment that is used for above-mentioned technology provided by the present invention comprises dense water tank, surface exchanger, accurate filter, high temperature reverse osmosis membrane apparatus, energy recycle device, super density wastewater during case and clear water tanks.Described dense water tank links to each other with the dense water inlet of surface exchanger by lift pump, the dense water out of described surface exchanger links to each other with the water-in of accurate filter, the water outlet of described accurate filter links to each other with the dense water input terminus of high temperature reverse osmosis membrane apparatus by high-pressure pump, the water purification output terminal of described high temperature reverse osmosis membrane apparatus links to each other with the input terminus of clear water tanks, the super dense water output terminal of described high temperature reverse osmosis membrane apparatus links to each other with the dense water high-pressure inlet of energy recycle device, the dense water low tension outlet of described energy recycle device links to each other with super density wastewater during case, the clear water low pressure inlet of described energy recycle device links to each other with the water outlet of accurate filter, and the clear water high-pressure outlet of described energy recycle device links to each other with the dense water input terminus of high temperature reverse osmosis membrane apparatus by topping-up pump.
As preferred version, be provided with dense heater water tank in the described dense water tank.Dense heater water tank can adopt electrically heated coil pipe or steam heating coil that the dense water in the dense water tank is heated, and also can adopt the steam-water mixture well heater of steam and water Hybrid Heating, itself and surface exchanger complementation.When surface exchanger is not enough to that dense water is heated to the desired operating temperature of high temperature reverse osmosis membrane apparatus, can in time open dense heater water tank, the temperature all-the-time stable of guaranteeing dense water is in the scope that requires, thereby keeps the normal operation and the circulation of whole dense water high temperature reverse-osmosis treated equipment.
As preferred version, the water inlet pipeline section of described accurate filter is provided with the Scale inhibitors throwing device.The Scale inhibitors throwing device is used for the Scale inhibitors of requirement is added to dense water, to stop difficulty soluble salt ion and the organism fouling on membrane element in the dense water, guarantees the safe operation of high temperature reverse osmosis membrane apparatus.
As preferred version, the output terminal of described clear water tanks links to each other with the water-in of accurate filter by the reverse osmosis flushing pump.Starting or stopping when safeguarding, by the flushing operation of reverse osmosis flushing pump to the high temperature reverse osmosis membrane apparatus, the pollutant removal that the membrane element influent side is resulted in blockage easily is clean, thereby prolongs the working life of high temperature reverse osmosis membrane apparatus.
As preferred version, the pore size filter of described accurate filter is 5 microns.Accurate filter claims the strainer of ensuring public security again, and its 5 microns filter openings can effectively be removed pollutents such as particle in the water, impurity, suspended substance, thereby the protection reverse-osmosis membrane element is not blocked up by dirt.
The present invention carries out stage treatment by the difference that contains Pollutant levels to waste water in conjunction with the characteristics of existing all kinds of reverse osmosis process, and its advantage applies is in following several respects:
One, designed waste water treatment process at first adopt twice technology of former water reverse osmosis (RO) and dense water reverse osmosis CRO to come pre-concentration waste water (or adopting both bonded multi-stage type reverse osmosis MCRO) successively, and the initial reclamation rate that can guarantee waste water is about 85%; Adopt high temperature reverse osmosis HTRO that pre-concentration waste water is further handled on this basis again, can reclaim water purification wherein once more, thereby recycle-water resource to greatest extent is increased to 95～98% with whole Wastewater Recovery rate.
They are two years old, because final hyperconcentration wastewater flow rate of discharging is very little, only account for 2～5% of waste water total amount, thereby in the follow-up evaporate to dryness unit of wastewater zero discharge ZLD system, can reduce the steam consumption quantity or the electric consumption of evaporative crystallization, reduce the one-time investment and the operation and maintenance cost of evaporation crystallization equipment, make waste liquid change the feature of environmental protection zero release of complete meaning into by qualified discharge.
They are three years old, because the different waste water treatment by stages that contain dirty concentration, reverse osmosis process at different levels all will move in the scope that himself allows, the scope that water temperature can be in 40 ℃≤T3≤80 ℃ when particularly the high temperature reverse osmosis HTRO stage was moved, can effectively avoid the difficulty soluble salt etc. in the dense salt waste water to pollute at the film surface deposition, not only can guarantee stable equipment operation safety, and can under the low relatively situation of running cost, significantly improve the Wastewater Recovery rate.
Description of drawings
Fig. 1 is the flow diagram of superelevation rate of recovery waste water treatment process of the present invention.
Fig. 2 is the structural representation that is used for the dense water high temperature reverse-osmosis treated equipment of the described technology of Fig. 1.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 2, dense water high temperature reverse-osmosis treated equipment in the superelevation rate of recovery waste water treatment process of the present invention mainly is made up of parts such as dense heater water tank 1, dense water tank 2, lift pump 3, surface exchanger 4, Scale inhibitors throwing device 5, accurate filter 6, high-pressure pump 7, topping-up pump 8, energy recycle device 9, high temperature reverse osmosis membrane apparatus 10, super density wastewater during case 11, clear water tanks 12 and reverse osmosis flushing pumps 13.Dense water heater 1 adopts the electrically heated coil pipe, is fixedly mounted in the dense water tank 2.Dense water tank 2 links to each other with the dense water inlet of the surface exchanger 4 of plank frame by lift pump 3, the dense water out of surface exchanger 4 links to each other with the water-in of accurate filter 6, and the thermal medium of surface exchanger 4 adopts the distillate or the steam of evaporate to dryness unit (vaporizer and crystallizer) reuse.
The water outlet of accurate filter 6 links to each other with the dense water input terminus of high temperature reverse osmosis membrane apparatus 10 by high-pressure pump 7, the water purification output terminal of high temperature reverse osmosis membrane apparatus 10 links to each other with the input terminus of clear water tanks 12, the super dense water output terminal of high temperature reverse osmosis membrane apparatus 10 links to each other with the dense water high-pressure inlet of energy recycle device 9, the dense water low tension outlet of energy recycle device 9 links to each other with super density wastewater during case 11, the clear water low pressure inlet of energy recycle device 9 links to each other with the water outlet of accurate filter 6, and the clear water high-pressure outlet of energy recycle device 9 links to each other with the dense water input terminus of high temperature reverse osmosis membrane apparatus 10 by topping-up pump 8.
The pore size filter of above-mentioned accurate filter 6 is selected 5 microns parameter value for use.The water inlet of accurate filter 6 is provided with Scale inhibitors throwing device 5, and the medicine outlet of Scale inhibitors throwing device 5 links to each other with the water-in pipeline section that advances accurate filter 6.The output terminal of above-mentioned clear water tanks 12 links to each other by the water-in of reverse osmosis flushing pump 13 with accurate filter 6.
As shown in Figure 1, superelevation rate of recovery waste water treatment process of the present invention is used for the wastewater treatment after certain coal-fired plant flue gas desulfurization, its flow process is such: the waste water that reaches the reverse osmosis operating requirement through pre-treatment carries out three reverse osmosis concentration separation under the different condition stage by stage, finishes zero discharge treatment at last:
1) reverse osmosis for the first time: will be that the waste water of TDS=8300～9100ppm is introduced in the former water reverse osmosis (RO) treatment facility through total dissolved solidss concentration after the pre-treatment, control pressure 5bar≤P1≤30bar that former water reverse osmosis (RO) is handled, 15 ℃≤T1 of temperature≤30 ℃, in waste water, add simultaneously the Scale inhibitors of concentration N1=4ppm, Scale inhibitors is selected polyacrylic acid for use, isolate dense water for the first time, the total dissolved solidss concentration TDS=23000～26000ppm of dense water is for the first time learnt in detection, the weight of dense water accounts for 25% of waste water gross weight for the first time, obtains to account for the water purification of waste water gross weight 75% simultaneously.
2) reverse osmosis for the second time: with the isolated first time dense water waste water introduce in the dense water reverse osmosis CRO treatment facility, control pressure 30bar≤P2≤70bar that dense water reverse osmosis CRO handles, 15 ℃≤T2 of temperature≤30 ℃, add the Scale inhibitors of concentration N2=2ppm simultaneously in the dense water to the first time, Scale inhibitors is selected polyacrylic acid for use, isolate dense water for the second time, the total dissolved solidss concentration TDS=58000ppm～62000ppm of dense water is for the second time learnt in detection, the weight reduction of dense water is to accounting for 10% of waste water gross weight for the second time, and accumulation simultaneously obtains to account for the water purification of waste water gross weight 90%.
3) reverse osmosis for the third time: in the dense water high temperature reverse-osmosis treated equipment that the isolated second time of dense water introducing is shown in Figure 2.Particularly, dense water at first enters dense water tank 2 for the second time, can start dense heater water tank 1 as required and carry out thermal pretreatment.Enter surface exchanger 4 from the dense water second time that dense water tank 2 comes out by lift pump 3, be heated to 60～80 ℃ therein.Meanwhile, by Scale inhibitors throwing device 5 to the second time of flux surface interchanger 4 dense water add Scale inhibitors, Scale inhibitors still selects polyacrylic acid, the concentration N3=0.5 of Scale inhibitors～1.0ppm.Then, dense water enters accurate filter 6 for the second time, filters the back and enters high temperature reverse osmosis membrane apparatus 10 by high-pressure pump 7, carries out high temperature reverse osmosis HTRO and handles.Pressure 20bar≤P3≤50bar that control high temperature reverse osmosis HTRO handles, temperature-stable are in 60 ℃≤T3≤80 ℃, isolate dense for the third time water, the total dissolved solidss concentration TDS=110000～130000ppm of dense water is for the third time learnt in detection, and the weight reduction of dense water is to accounting for 3% of waste water gross weight for the third time.
Dense for the third time water enters energy recycle device 9 from the super dense water output terminal of high temperature reverse osmosis membrane apparatus 10, delivers to storage the super density wastewater during case 11 from the dense water low tension outlet of energy recycle device 9 behind the transducing that reduces pressure therein.Meanwhile, from the part of accurate filter 6 for the second time dense water enter into energy recycle device 9, absorb therein behind the energy to enter and continue circulation in the high temperature reverse osmosis membrane apparatus 10 by topping-up pump 8.
Directly be delivered to storage the clear water tanks 12 from the effusive water purification of water purification output terminal of high temperature reverse osmosis membrane apparatus 10.Through after this reverse-osmosis treated, can accumulate the water purification that obtains to account for waste water gross weight 97%.In order to prolong the working life of high temperature reverse osmosis membrane apparatus 10, when being preferably in each startup or parking and safeguarding with the water purification in a part of clear water tanks 12 of reverse osmosis flushing pump 13 suctions, be used to remove the dirt on the high temperature reverse osmosis membrane apparatus 10 influent side membrane elements, avoid its obstruction.
4) dense water zero discharge: the dense for the third time water that stores in the super density wastewater during case 11 is carried out evaporative crystallization handle, because the dense water yield is very little for the third time, evaporation crystallization equipment selects for use load less vaporizer, crystallizer or moisture eliminator of various types of processing to get final product, and the dry slag of gained is buried in the usual way.Perhaps, the isolated dense for the third time water of institute is used for coal storing or flushing coal ash.Also it can be entered an open-air evaporation pond, fall, realize the waste water quasi-zero emission by the spontaneous evaporation at sunshine.The open-air comparable traditional way of the needed evaporation area of evaporation pond dwindles at least 50～80%.
Claims (10)
1. a superelevation rate of recovery waste water treatment process is the process of the waste water that reaches the reverse osmosis operating requirement through pre-treatment being carried out continuous separating treatment, and it is characterized in that: this technology comprises the steps:
1) reverse osmosis for the first time: to total dissolved solidss concentration is that the waste water of TDS≤10000ppm carries out former water reverse osmosis (RO) and handles, isolate dense water for the first time, the total dissolved solidss concentration of the control dense water first time is at 10000ppm＜TDS≤30000ppm, and the weight of dense water accounts for 20～30% of waste water gross weight for the first time;
2) reverse osmosis for the second time: to the isolated first time of institute dense water carry out dense water reverse osmosis CRO and handle, isolate dense water for the second time, the total dissolved solidss concentration of the control dense water second time is at 30000ppm＜TDS≤80000ppm, and the weight reduction of dense water is to 10～15% of the waste water gross weight for the second time;
3) reverse osmosis for the third time: to the isolated second time of institute dense water carry out high temperature reverse osmosis HTRO and handle, isolate dense for the third time water, the weight reduction of dense water is to 2～5% of the waste water gross weight for the third time, thereby obtains to account for the water purification of waste water gross weight 95～98%.
2. superelevation rate of recovery waste water treatment process according to claim 1, it is characterized in that: this technology also comprises the steps:
4) dense water zero discharge: isolated dense for the third time water is carried out evaporative crystallization handle, the dry slag of gained is buried in the usual way; Perhaps the isolated concentrated water drainage for the third time of institute is gone into spontaneous evaporation in the open-air evaporation pond; Perhaps the isolated dense for the third time water of institute is used for coal storing or flushing coal ash.
3. superelevation rate of recovery waste water treatment process according to claim 1 and 2 is characterized in that: pressure P 1≤30bar, 5 ℃≤T1 of temperature＜40 ℃ that described former water reverse osmosis (RO) is handled; Pressure P 2≤70bar, 5 ℃≤T2 of temperature＜40 ℃ that described dense water reverse osmosis CRO handles; Pressure P 3≤60bar, 40 ℃≤T3 of temperature≤80 ℃ that described high temperature reverse osmosis HTRO handles.
4. superelevation rate of recovery waste water treatment process according to claim 3 is characterized in that: pressure 5bar≤P1≤30bar, 15 ℃≤T1 of temperature≤30 ℃ that described former water reverse osmosis (RO) is handled; Pressure 30bar≤P2≤70bar, 15 ℃≤T2 of temperature≤30 ℃ that described dense water reverse osmosis CRO handles; Pressure 20bar≤P3≤60bar, 60 ℃≤T3 of temperature≤80 ℃ that described high temperature reverse osmosis HTRO handles.
5. superelevation rate of recovery waste water treatment process according to claim 1 and 2 is characterized in that: when described former water reverse osmosis (RO) is handled, and the concentration N1 of the Scale inhibitors that in waste water, adds≤5ppm; When described dense water reverse osmosis CRO handles, the concentration N2≤2ppm of the Scale inhibitors that in dense water for the first time, adds; When described high temperature reverse osmosis HTRO handles, the concentration N3≤1ppm of the Scale inhibitors that in dense water for the second time, adds.
6. dense water high temperature reverse-osmosis treated equipment that is used for the described technology of claim 1, comprise dense water tank (2), surface exchanger (4), accurate filter (6), high temperature reverse osmosis membrane apparatus (10), energy recycle device (9), super density wastewater during case (11) and clear water tanks (12), it is characterized in that: described dense water tank (2) links to each other with the dense water inlet of surface exchanger (4) by lift pump (3), the dense water out of described surface exchanger (4) links to each other with the water-in of accurate filter (6), the water outlet of described accurate filter (6) links to each other with the dense water input terminus of high temperature reverse osmosis membrane apparatus (10) by high-pressure pump (7), the water purification output terminal of described high temperature reverse osmosis membrane apparatus (10) links to each other with the input terminus of clear water tanks (12), the super dense water output terminal of described high temperature reverse osmosis membrane apparatus (10) links to each other with the dense water high-pressure inlet of energy recycle device (9), the dense water low tension outlet of described energy recycle device (9) links to each other with super density wastewater during case (11), the clear water low pressure inlet of described energy recycle device (9) links to each other with the water outlet of accurate filter (6), and the clear water high-pressure outlet of described energy recycle device (9) links to each other with the dense water input terminus of high temperature reverse osmosis membrane apparatus (10) by topping-up pump (8).
7. dense water high temperature reverse-osmosis treated equipment according to claim 6 is characterized in that: be provided with dense heater water tank (1) in the described dense water tank (2).
8. according to claim 6 or 7 described dense water high temperature reverse-osmosis treated equipment, it is characterized in that: the water-in pipeline section of described accurate filter (6) is provided with Scale inhibitors throwing device (5).
9. according to claim 6 or 7 described dense water high temperature reverse-osmosis treated equipment, it is characterized in that: the output terminal of described clear water tanks (12) links to each other by the water-in of reverse osmosis flushing pump (13) with accurate filter (6).
10. according to claim 6 or 7 described dense water high temperature reverse-osmosis treated equipment, it is characterized in that: the pore size filter of described accurate filter (6) is 5 microns.
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| CN105502582A (en) * | 2016-01-19 | 2016-04-20 | 日出东方太阳能股份有限公司 | Water purifier RO (reverse osmosis) membrane filter flask and RO method thereof |
| CN106892541A (en) * | 2017-04-18 | 2017-06-27 | 湖北百清环保技术有限公司 | Portable high-concentration waste liquor treating process and device |
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| CN105502582A (en) * | 2016-01-19 | 2016-04-20 | 日出东方太阳能股份有限公司 | Water purifier RO (reverse osmosis) membrane filter flask and RO method thereof |
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| CN107902784A (en) * | 2017-12-11 | 2018-04-13 | 武汉斯隆电气有限公司 | Instant heating type water purifier and its waterway control system |
| CN108623040A (en) * | 2018-05-08 | 2018-10-09 | 深圳市华虹清源环保科技有限公司 | A kind of high-recovery inorganic wastewater treatment process |
| CN112279385A (en) * | 2020-10-29 | 2021-01-29 | 山西威尔环保科技有限公司 | Reverse osmosis membrane scale inhibitor and preparation method and application thereof |
| CN112811699A (en) * | 2021-01-27 | 2021-05-18 | 恒安（重庆）生活用纸有限公司 | Reverse osmosis purification backwater device |
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