CN205295055U - It puts to be applied to disguise of high salt waste water resource of coal industry - Google Patents
It puts to be applied to disguise of high salt waste water resource of coal industry Download PDFInfo
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- CN205295055U CN205295055U CN201520974600.8U CN201520974600U CN205295055U CN 205295055 U CN205295055 U CN 205295055U CN 201520974600 U CN201520974600 U CN 201520974600U CN 205295055 U CN205295055 U CN 205295055U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model provides an it puts to be applied to disguise of high salt waste water resource of coal industry, strains water, sodium chloride and the sodium sulphate among branch salt, go with each other all the time multiple effect evaporation and the three unit of the ageing mother liquor processing recovery industrial waste water through receiving, through the utility model discloses handle the high salt waste water of coal industry, can retrieve and be not less than 99% moisture and be not less than 90% salinity, reuse water quality of water satisfies desalinized water or the requirement of circulating water moisturizing quality of water, sodium chloride satisfying criteria GBT5462 -2003 " industry salt " the exposure to sunlight industry salt second of retrieving, III types of certified products of sodium sulphate satisfying criteria GBT 6009 -2014 " industry anhydrous sodium sulphate ", can changing waste into valuables, solid useless environmental issue has not only been solved, the product that has economic value has also been produced, the direct or indirect waste water treatment of reduction by a wide margin cost, thereby the most genuine realization industrial waste water " zero " discharges.
Description
Technical field
This utility model belongs to Coal Chemical Industry high-salt wastewater processing technology field, is specifically related to one and is applied to Coal Chemical Industry high-salt wastewater recycling unit.
Background technology
Coal is the main fossil energy of China, Modern Coal-based Chemical is based on coal-derived energy chemical technology, coal gasification is leading, use catalyze and synthesize, separate, the advanced Chemical Engineering Technology such as biochemical industry, production can the clear energy sources of petroleum replacing and all kinds of chemical products, such as product oil, natural gas, methanol, dimethyl ether, ethylene, propylene etc. China's Coal Chemical Engineering Project is mainly distributed on the ground such as Inner Mongol, Shaanxi, Xinjiang, Shanxi, Ningxia, Gansu.
Coal resources in China and distribution of water resources are extremely unbalanced. Kun Lun Mountain-Qinling Dabie Mountain one line northern area coal resources accounts for more than the 90% of whole nation total amount, and water resource only accounts for the 21% of whole nation total amount. Western and the northern territory in China, the shortage of surface water resources directly results in exhaustive exploitation and the pollution of subsoil water. For alleviating water pollution form, " energy-saving and emission-reduction " 12 " planning " and " national environmental protection " 12 " planning " all proposes the main water pollutant such as COD, ammonia nitrogen and reduces discharging the target of 8%; " suggestion about carrying out most stringent water resources management system " that State Council in 2012 issues has marked three red lines about water body, carries out most stringent water resources management from State-level.
Wastewater zero discharge is referred to as zero liquid discharge (ZLD) abroad, refers to that any type of waste water does not discharge to waters, earth's surface in enterprise; The industrial water system that zero-emission is construed in GB/T21534-2008 " water for industrial use water saving term " enterprise or main unit reaches to arrange outside industrial wastewater. It is acted upon again in short, zero-emission is exactly the form that industrial wastewater concentration becomes solid or concentration, rather than to be discharged to natural water outside the form of waste water. Under above-mentioned background, water resource and water environmental problems have become the bottleneck of restriction Developing Coal Chemical Industry, it is achieved waste water real " zero-emission " has become the self-demand of Development of Coal Chemical Industry and external requirement.
The waste water that Coal Chemical Industry each unit produces eventually processes with the unity of form of brine waste;Currently, Coal Chemical Industry brine waste passes through the Water circulation that membrance concentration is by 80��90%, all the other enter evaporative crystallization unit (or shining salt pond) with the form of the dense water of high salt, Water circulation will be remained, and inorganic salt with the isolated in form of the useless mixed salt of solid and discharges, this is also the waste water zero emission form currently realized, i.e. the substantially all recycling of water resource, and salt component is with useless mixed salt landfill disposal; But this solid gives up, mixed salt complicated components, concentration of narmful substance height, process the dangerous solid waste landfill site that investment need to be adopted higher, by domestic current management method, and useless more than the about 2000 yuan/ton of cost of disposal of danger, account for evaporative crystallization total cost more than 60%; And sodium chloride and sodium sulphate content are up to more than 95% in the mixed salt that gives up, this part salt is recycled the waste water zero emission that then can realize real meaning.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide one and is applied to Coal Chemical Industry high-salt wastewater recycling unit, the Water Sproading that can will be not less than 99% in Coal Chemical Industry high-salt wastewater, the salt being not less than 90% reclaims, produce sodium chloride and the sodium sulfate of technical grade, reduce the processing cost of solid waste, power consumption and heat consumption also lower simultaneously, more economical; Coal chemical industry sewage disposal environmental protection pressure is substantially reduced the most at last, too increases economic well-being of workers and staff simultaneously.
To achieve these goals, the technical solution adopted in the utility model is:
One is applied to Coal Chemical Industry high-salt wastewater recycling unit, salt unit, 1st effective evaporator, 2nd effect evaporator, triple effect evaporator, four-effect evaporator, quintuple effect evaporator and aging mother liquid disposal unit is divided including nanofiltration, its nano-filtration unit one tunnel and nanofiltration dense water one-level preheater, nanofiltration dense water two grades of preheaters, 1st effective evaporator, 2nd effect evaporators, nitre cyclone, nitre slurry surge tank is sequentially communicated; Nitre slurry surge tank connects nitre centrifuge mother liquor surge tank by nitre centrifuge, and nitre centrifuge mother liquor surge tank connects aging mother liquid disposal unit; Water one-level preheater is produced in another road of nano-filtration unit and nanofiltration, nanofiltration is produced water two grades of preheaters, triple effect evaporator, four-effect evaporator, quintuple effect evaporators and is sequentially communicated, and quintuple effect evaporator connects salt slurry surge tank by salt cyclone; Salt slurry surge tank connects filter press by pressure filter feeding pump, and filter press connects pressure filter mother solution surge tank, and pressure filter mother solution surge tank connects aging mother liquid disposal unit, is simultaneously connected with quintuple effect evaporator;
Described 1st effective evaporator one end connects steamdrum, the outlet of 1st effective evaporator one end is sequentially connected with 2nd effect evaporator, triple effect evaporator, four-effect evaporator, quintuple effect evaporator, the other end and an effect compensator, an effect flash tank are sequentially connected with, and an effect flash tank connects the dense water one-level preheater of nanofiltration by raw steam condensate (SC) pump; Quintuple effect evaporator connects water ring vacuum pump by mixing condenser; The mixing condenser other end connects cooling water sealed tank; Described 2nd effect evaporator, triple effect evaporator, four-effect evaporator respectively through two imitating compensators, three-effect balance tank, quadruple effect compensator, five effect compensator parallel connections connect nanofiltration by raw steam condensate (SC) pump and produce water one-level preheater, nanofiltration is produced water one-level preheater and is connected recycled water cooler;
Described nano-filtration unit is produced water pump by nanofiltration and is connected nanofiltration product water one-level preheater, connects the dense water one-level preheater of nanofiltration by the dense water pump of nanofiltration; 2nd effect evaporator connects nitre cyclone by nitre discharging pump; Nitre centrifuge mother liquor surge tank connects aging mother liquid disposal unit by nitre centrifuge mother liquor discharging pump;Pressure filter mother solution surge tank connects aging mother liquid disposal unit by salt mother solution pump; Quintuple effect evaporator connects salt cyclone by salt discharging pump;
Described nitre centrifuge one end is also connected with pin product packing machine; The filter press other end connects product salt packer.
Described 1st effective evaporator, 2nd effect evaporator, triple effect evaporator, four-effect evaporator, quintuple effect evaporator are respectively equipped with an effect forced circulation pump, two effect forced circulation pumps, triple effect forced circulation pump, quadruple effect forced circulation pump, five effect forced circulation pumps.
Described 1st effective evaporator, 2nd effect evaporator, triple effect evaporator, four-effect evaporator, quintuple effect evaporator use, several size and the ratio producing water and the dense water water yield of nanofiltration according to nanofiltration of its effect, be usually arranged as quadruple effect or five effects; End effect secondary steam cools down and ensures vacuum by condenser, and end vacuum generally remains in-0.85��-0.90KPaG.
Described nanofiltration divides salt unit to adopt NF membrane, and NF membrane aperture is 1��2nm.
Described aging mother liquid disposal unit adopts a diaphragm type vacuum drying equipment, and thermal source is the low-pressure steam of 0.5��1.0MPaG, and the heat exchange of mother solution carries out under the environment of vacuum, and vacuum generally ensures at-70��-80KPaG.
A described effect flash tank can by a kind of replacement in Oslo crystallizer, draft tube baffle crystallizer, DP crystallizer.
The beneficial effects of the utility model are:
1) this utility model can will be not less than 99% Water Sproading in waste water, the salt being not less than 90% reclaims, and produces sodium chloride and sodium sulfate, the process conditions simple and stable, it is simple to industrialization promotion of technical grade. By this utility model method, can reclaim and obtain highly purified sodium chloride and sodium sulfate, meet the prescription of technical grade product, can directly reclaim or sell as side-product packaging, fundamental significance, achieve Coal Chemical Engineering Industry waste water " zero " discharge, meet currently increasingly serious environmental protection needs, and turn waste into wealth, realize the recycling of salt, alleviate the inferior position that Industrial Wastewater Treatment cost is high largely.
2) this utility model is to adopt three unit, and namely nanofiltration divides salt, multiple-effect evaporation crystallization and aging mother liquid disposal; Three parts recursion successively is run, and namely high-salt wastewater sequentially passes through nano-filtration unit, multiple-effect evaporation crystalline element, mother solution aged cell; By Water Sproading most in waste water, the salt of more than 90% is sold as product packaging, and the mixed salt of about the 10% of aging mother liquid disposal unit generation then can fill or combustion furnace calcination processing; In whole process, without other emissions except a little abraum salt need to process, so greatly reducing original processing cost,
3) containing some high molten components that maybe should not precipitate out in Coal Chemical Industry high-salt wastewater, such as COD, sodium sulfide, sodium carbonate etc., these components, along with continuous concentration, can become more and more, finally makes mother liquid evaporation " aging ", and then affects the quality of salt quality; And by mother solution burin-in process unit of the present utility model, a part of mother solution can be extracted all the time out and enter this cell processing, finally make the molten constituent content that maybe should not precipitate out of the height in mother liquid evaporation maintain all the time in allowed limits, be always ensured that product sodium chloride and sodium sulfate quality are up to standard.
4) for conventional thought, it is generally required to dense for nanofiltration water and nanofiltration are produced water and is respectively processed by two set vaporising devices, and then product salt is obtained; And this utility model is only with a set of multi-effect evaporating device, the dense water of nanofiltration and nanofiltration are produced water and are simultaneously entered this device, and enriching slurry is also simultaneously by this device extraction, is greatly saved investment and the floor space of device, and the energy consumption being also greatly reduced so that this utility model has more competitiveness;
5) feeding manner of water is produced in the dense water of vaporising device nanofiltration and nanofiltration is the difference according to two kinds of salt solubilities, when namely sodium sulfate is below 40 degree, along with the rising dissolubility of temperature increases; And time more than 40 degree, along with the rising dissolubility of temperature declines on the contrary; And the solubility with temperature change of sodium chloride is inconspicuous; So the dense wet concentration of nanofiltration rich in sodium sulfate selects the leading portion entering multiple-effect evaporation, the operating temperature range of leading portion is 100��150 DEG C; Nanofiltration product water rich in sodium chloride then selects to enter the second half section of multiple-effect evaporation, and the operating temperature range of back segment is 100��50 DEG C; Therefore sodium sulfate, low-temperature zone precipitated sodium chloride are precipitated out in high temperature section; The Nacl product that purity is higher is obtained after centrifugal drying.
6) evaporative crystallization unit is multiple-effect evaporation, at the vaporizer not having crystallization optional falling film evaporator, natural-circulation evaporator, forced-circulation evaporator, it is preferable that falling film evaporator; Falling film evaporator has the advantages such as high heat transfer coefficient, low heat transfer area, circulating load are little, is very suitable for steaming water and concentration, can save effective heat transfer temperature difference of whole device, reduces cost of investment; Vaporizer containing crystallization selects forced-circulation evaporator. Forced-circulation evaporator is the vaporizer that a kind of heat transfer coefficient is big, resistive connection bar ability is strong, and solution circulation in equipment is mainly by forced flow produced by additionaling power, and circulation rate is traditionally arranged to be 2��3m/s; It is heated when circulating liquid and flowing through and add hot cell, part evaporation when then pressure reduces in separation chamber; Feed liquid enters separation chamber's gas-liquid separation, it is possible to idetified separation effect, makes integral device have bigger separation elastic; Higher circulation rate makes crystal salt cannot tie on heat exchanger tube, is conducive to processing the solution that viscosity fouling bigger, easy, the material of easy crystallization or concentrating degree are higher, is therefore highly suitable for crystallizing out the evaporation of salt.
7) can by waste water more than 99% Water Sproading and reach desalted water or circulating cooling make-up water index request; The salt being not less than 90% in waste water is reclaimed with the form of sodium sulfate and sodium chloride, and the sodium chloride reclaimed is met standard GB/T5462-2003 " Nacl " Exposure to Sunlight Nacl seconds; Sodium sulfate meets standard GB/T6009-2014 " industrial anhydrous sodium sulfate " III class certified products.
Accompanying drawing explanation
Fig. 1 is structure of the present utility model and process flow diagram.
Wherein, 1 divides salt unit for nanofiltration; 2 is the dense water one-level preheater of nanofiltration; 3 is nanofiltration two grades of preheaters of dense water; 4 is 1st effective evaporator; 5 produce water pump for nanofiltration; 6 is 2nd effect evaporator; 7 is the dense water pump of nanofiltration; 8 is nitre cyclone; 9 is nitre centrifuge; 10 is nitre centrifuge mother liquor surge tank; 11 starch surge tank for nitre; 12 produce water one-level preheater for nanofiltration; 13 produce two grades of preheaters of water for nanofiltration; 14 is nitre discharging pump; 15 is triple effect evaporator; 16 is four-effect evaporator; 17 is nitre centrifuge mother liquor discharging pump; 18 is quintuple effect evaporator; 19 is salt mother solution pump; 20 is salt cyclone; 21 is pressure filter mother solution surge tank; 22 starch surge tank for salt; 23 is pressure filter feeding pump; 24 is filter press; 25 is aging mother liquid disposal unit; 26 is an effect compensator; 27 is an effect flash tank; 28 is mixing condenser; 29 is water ring vacuum pump; 30 is two effect compensators; 31 is three-effect balance tank; 32 is quadruple effect compensator; 33 is recycled water cooler; 34 is steamdrum; 35 is salt discharging pump; 36 is pin product packing machine, and 37 is product salt packer;38 is cooling water sealed tank; 39 make a living steam condensate (SC) pump; 40 is five effect compensators; 41 is high-salt wastewater pipe; 42 is steam pipe; 43 make a living steam condenser pipe; 44 supplement pipe for recycled water; 45 extremely out-of-bounds manage for recycled water; 46 export for abraum salt; 47 is cooling feed pipe; 48 for cooling back water pipe; 49 is low-pressure steam condensing tube; 50 is low pressure steam pipe.
In Fig. 1, the thick filled arrows of black represents that material moves towards, the thick hollow arrow of black represents that steam moves towards, black carefully single arrow represents salt and nitre product treatment trend, and the thin double-head arrow of black represents the flow direction of condensed water, recirculated water, cooling feedwater, cooling backwater, and thin three arrows of black represent that fixed gas flows to.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further details:
As shown in Figure 1, one is applied to Coal Chemical Industry high-salt wastewater recycling unit, salt unit 1,1st effective evaporator 4,2nd effect evaporator 6, triple effect evaporator 15, four-effect evaporator 16, quintuple effect evaporator 18 and aging mother liquid disposal unit 25 is divided including nanofiltration, nanofiltration divides salt unit 1 one tunnel and nanofiltration dense water one-level preheater 2, nanofiltration two grades of preheaters 3 of dense water, 1st effective evaporator 4,2nd effect evaporator 6, and nitre cyclone 8, nitre slurry surge tank 11 is sequentially communicated; Nitre slurry surge tank 11 connects nitre centrifuge mother liquor surge tank 10 by nitre centrifuge 9, and nitre centrifuge mother liquor surge tank 10 connects aging mother liquid disposal unit 25; Nanofiltration divides another road of salt unit 1 and nanofiltration to produce water one-level preheater 12, two grades of preheaters 13 of water are produced in nanofiltration, triple effect evaporator 15, four-effect evaporator 16, quintuple effect evaporator 18 are sequentially communicated, and quintuple effect evaporator 18 connects salt slurry surge tank 22 by salt cyclone 20; Salt slurry surge tank 22 connects filter press 24 by pressure filter feeding pump 23, and filter press 24 connects pressure filter mother solution surge tank 21, and pressure filter mother solution surge tank 21 connects aging mother liquid disposal unit 25, is simultaneously connected with quintuple effect evaporator 18;
Described 1st effective evaporator 4 one end connects steamdrum 34, the outlet of 1st effective evaporator 4 one end is sequentially connected with 2nd effect evaporator 6, triple effect evaporator 15, four-effect evaporator 16, quintuple effect evaporator 18, the other end and an effect compensator 26, are imitated flash tank 27 and are sequentially connected with, and an effect flash tank 27 connects the dense water one-level preheater 2 of nanofiltration by raw steam condensate (SC) pump 39; Quintuple effect evaporator 18 connects water ring vacuum pump 29 by mixing condenser 28; Mixing condenser 28 other end connects cooling water sealed tank 38; Described 2nd effect evaporator 6, triple effect evaporator 15, four-effect evaporator 16 respectively through two imitating compensators 30, three-effect balance tank 31, quadruple effect compensator 32, five imitate that compensator 40 is in parallel to be connected nanofiltration by raw steam condensate (SC) pump 39 and produce water one-level preheater 12, nanofiltration is produced water one-level preheater 12 and is connected recycled water cooler 33;
Described nanofiltration divides salt unit 1 to produce water pump 5 by nanofiltration and connects nanofiltration product water one-level preheater 12, connects the dense water one-level preheater 2 of nanofiltration by the dense water pump of nanofiltration 7; 2nd effect evaporator 6 connects nitre cyclone 8 by nitre discharging pump 14; Nitre centrifuge mother liquor surge tank 10 connects aging mother liquid disposal unit 25 by nitre centrifuge mother liquor discharging pump 17; Pressure filter mother solution surge tank 21 connects aging mother liquid disposal unit 25 by salt mother solution pump 19; Quintuple effect evaporator 18 connects salt cyclone 20 by salt discharging pump 35;
Described nitre centrifuge 9 one end is also connected with pin product packing machine 36; Filter press 24 other end connects product salt packer 37.
Described 1st effective evaporator 4,2nd effect evaporator 6, triple effect evaporator 15, four-effect evaporator 16, quintuple effect evaporator 18 are respectively equipped with an effect forced circulation pump, two effect forced circulation pumps, triple effect forced circulation pump, quadruple effect forced circulation pump, five effect forced circulation pumps.
Described 1st effective evaporator 4,2nd effect evaporator 6, triple effect evaporator 15, four-effect evaporator 16, quintuple effect evaporator 18 use, several size and the ratio producing water and the dense water water yield of nanofiltration according to nanofiltration of its effect, be usually arranged as quadruple effect or five effects; End effect secondary steam cools down and ensures vacuum by condenser, and end vacuum generally remains in-0.85��-0.90KPaG.
Described nanofiltration divides salt unit 1 to adopt NF membrane, NF membrane aperture to be 1��2nm.
Described aging mother liquid disposal unit 25 adopts a diaphragm type vacuum drying equipment, and thermal source is the low-pressure steam of 0.5��1.0MPaG, and the heat exchange of mother solution carries out under the environment of vacuum, and vacuum generally ensures at-70��-80KPaG.
A described effect flash tank 27 can by a kind of replacement in Oslo crystallizer, draft tube baffle crystallizer, DP crystallizer.
Operation principle of the present utility model is:
Flow direction of material:
Coal Chemical Industry high-salt wastewater initially enters nanofiltration by high-salt wastewater pipe 41 and divides salt unit 1, is classified as nanofiltration and produces water and the dense water of nanofiltration; Water is produced in nanofiltration and nanofiltration concentrated stream amount ratio is about 2��2.5; Wherein, nanofiltration is produced in water and is mainly contained sodium chloride and water, the dense water sulfur acid sodium of nanofiltration, sodium chloride and water; Water is produced in nanofiltration after separation and the dense water of nanofiltration is sent to evaporative crystallization unit.
The dense water of nanofiltration sequentially enters nanofiltration dense water one-level preheater 2 and nanofiltration two grades of preheaters 3 of dense water by the dense water pump of nanofiltration 7, it is preheated to 115��125 DEG C, preferably enter 1st effective evaporator 4 after 120 DEG C and be evaporated concentration, imitating forced circulation pump through one makes a part of feed liquid realize effect internal recycle, another part feed liquid sends into 2nd effect evaporator 6, continuing evaporation and concentration, evaporation and concentration temperature is 100��110 DEG C; Treating that the solids content of raffinate reaches 5��25%m, it is preferable that 15%m, start discharging, enter nitre cyclone 8 by nitre discharging pump and be concentrated into 25��30%m further, eddy flow dope enters nitre slurry surge tank 11 afterwards, and eddy flow clear liquid is back to 2nd effect evaporator 6 and continues concentration; Nitre in nitre slurry surge tank 11 is starched by 9 points of salt of nitre centrifuge, and the sodium sulfate water content of generation is not higher than 5%m, and simultaneously dry through pin product packing machine 36 and packaging stores as product sells; Centrifuge mother liquor then enters nitre centrifuge mother liquor surge tank 10, and then is dried a point salt treatment by aging mother liquid disposal unit 25.
Nanofiltration is produced water and is sequentially entered nanofiltration product water one-level preheater 12 and nanofiltration product two grades of preheaters 13 of water by nanofiltration product water pump 5, it is preheated to 90��100 DEG C, preferably entering triple effect evaporator 15 evaporation and concentration after 95 DEG C, evaporation and concentration temperature is 100��110 DEG C, it is preferable that 100 DEG C; Making a part of feed liquid realize effect internal recycle through triple effect forced circulation pump, another part feed liquid sends into four-effect evaporator 16, continues evaporation and concentration, and evaporating temperature is 80��90 DEG C, it is preferable that 80 DEG C; Making a part of feed liquid realize effect internal recycle through quadruple effect forced circulation pump, another part feed liquid sends into quintuple effect evaporator 18, continues evaporation and concentration, and evaporation and concentration temperature is 55��65 DEG C, it is preferable that 55 DEG C; Treating that the solids content of raffinate reaches 5��25%m, it is preferable that 15%m, start discharging, isomorphism salt discharging pump 35 enters salt cyclone 20 and is concentrated into 25��30%m further, and eddy flow dope enters salt slurry surge tank 22 afterwards, and clear liquid then enters pressure filter mother solution surge tank 21;Dense salt slurry is sent into filter press 24 by pressure filter feeding pump 23 and is carried out a point salt treatment afterwards, and salt-cake regularly sends into product salt packer 37, and mother solution then flows into pressure filter mother solution surge tank 21, and final mother solution is back to five effects continuation evaporations 18; Small part mother solution then enters mother solution aged cell 25 and processes.
Mother solution aged cell 25 one end is provided with abraum salt outlet 46, and one end is provided with cooling feed pipe 47, cools back water pipe 48, is additionally respectively arranged at two ends with low-pressure steam condensing tube 49, low pressure steam pipe 50.
Steam and condensation flow to:
Low-pressure saturated steam isomorphism steam pipe 42 initially enters steamdrum 34 and cushions, and then entrance 1st effective evaporator 4 heater is heated, supplement pipe 44 by recycled water is 1st effective evaporator 4 moisturizing simultaneously, the condensed water produced initially enters an effect compensator 26, enter effect flash tank 27 flash distillation at low pressures a recovery section heat afterwards, deliver to nanofiltration dense water one-level preheater 2 by raw steam condensate (SC) pump 39 afterwards and carry out indirect heat exchange with the dense water of nanofiltration, be sent to out-of-bounds raw steam condenser pipe 43 afterwards; The indirect steam that 1st effective evaporator 4 produces carries out heat exchange as 2nd effect evaporator 6 thermal source, the indirect steam that 2nd effect evaporator 6 produces carries out heat exchange as triple effect evaporator 15 thermal source, the indirect steam that triple effect evaporator 15 produces carries out heat exchange as four-effect evaporator 16 thermal source, the indirect steam that four-effect evaporator 16 produces carries out heat exchange as quintuple effect evaporator 18 thermal source, and the indirect steam that quintuple effect evaporator 18 produces is by mixing condenser 28 condensing cooling; Two, three, first the indirect steam condensed fluid that quadruple effect produces respectively enters two effect compensators 30, three-effect balance tank 31, quadruple effect compensator 32, send into nanofiltration product water one-level preheater 12 by raw steam condensate (SC) pump 39 after finally collecting and carry out heat exchange as thermal source with nanofiltration product water, enter recycled water to out-of-bounds pipe 45 with the form of recycled water afterwards; The fixed gas that mixing condenser 28 produces simultaneously is extracted out by water ring vacuum pump 29, enters air.
Circulating water flow to:
Recirculated water has two uses, and one is by cooling down feed pipe 47 for recycled water cooler 33 cooling medium reduction recycled water temperature; Another is by cooling back water pipe 48 for mixing condenser 28 cooling medium, and first backwater then flows into cooling water sealed tank fluid-tight, secondly sends into circulating backwater pipe network, and recycled water cooler 33 is connected to cooling feed pipe 47, cools back water pipe 48.
Claims (6)
1. one kind is applied to Coal Chemical Industry high-salt wastewater recycling unit, salt unit (1), 1st effective evaporator (4), 2nd effect evaporator (6), triple effect evaporator (15), four-effect evaporator (16), quintuple effect evaporator (18) and aging mother liquid disposal unit (25) is divided including nanofiltration, it is characterized in that, nanofiltration divides salt unit (1) tunnel and nanofiltration dense water one-level preheater (2), two grades of preheaters (3) of the dense water of nanofiltration, 1st effective evaporator (4), 2nd effect evaporator (6), and nitre cyclone (8), nitre slurry surge tank (11) are sequentially communicated; Nitre slurry surge tank (11) connects nitre centrifuge mother liquor surge tank (10) by nitre centrifuge (9), and nitre centrifuge mother liquor surge tank (10) connects aging mother liquid disposal unit (25); Nanofiltration divides salt unit (1) another road and nanofiltration to produce water one-level preheater (12), two grades of preheaters (13) of water are produced in nanofiltration, triple effect evaporator (15), four-effect evaporator (16), quintuple effect evaporator (18) are sequentially communicated, and quintuple effect evaporator (18) connects salt slurry surge tank (22) by salt cyclone (20);Salt slurry surge tank (22) connects filter press (24) by pressure filter feeding pump (23), filter press (24) connects pressure filter mother solution surge tank (21), pressure filter mother solution surge tank (21) connects aging mother liquid disposal unit (25), is simultaneously connected with quintuple effect evaporator (18);
Described 1st effective evaporator (4) one end connects steamdrum (34), the outlet of 1st effective evaporator (4) one end is sequentially connected with 2nd effect evaporator (6), triple effect evaporator (15), four-effect evaporator (16), quintuple effect evaporator (18), the other end and effect compensator (26), effect flash tank (27) are sequentially connected with, and effect flash tank (27) connects nanofiltration dense water one-level preheater (2) by raw steam condensate (SC) pump (39); Quintuple effect evaporator (18) connects water ring vacuum pump (29) by mixing condenser (28); Mixing condenser (28) other end connects cooling water sealed tank (38); Described 2nd effect evaporator (6), triple effect evaporator (15), four-effect evaporator (16) imitate respectively through two that compensator (30), three-effect balance tank (31), quadruple effect compensator (32), five effects compensator (40) are in parallel to be connected nanofiltration by raw steam condensate (SC) pump (39) and produce water one-level preheater (12), and nanofiltration is produced water one-level preheater (12) and connected recycled water cooler (33);
Described nanofiltration divides salt unit (1) to produce water pump (5) by nanofiltration and connects nanofiltration product water one-level preheater (12), connects nanofiltration dense water one-level preheater (2) by the dense water pump of nanofiltration (7); 2nd effect evaporator (6) connects nitre cyclone (8) by nitre discharging pump (14); Nitre centrifuge mother liquor surge tank (10) connects aging mother liquid disposal unit (25) by nitre centrifuge mother liquor discharging pump (17); Pressure filter mother solution surge tank (21) connects aging mother liquid disposal unit (25) by salt mother solution pump (19); Quintuple effect evaporator (18) connects salt cyclone (20) by salt discharging pump (35);
Described nitre centrifuge (9) one end is also connected with pin product packing machine (36); Filter press (24) other end connects product salt packer (37).
2. one according to claim 1 is applied to Coal Chemical Industry high-salt wastewater recycling unit, it is characterized in that, described 1st effective evaporator (4), 2nd effect evaporator (6), triple effect evaporator (15), four-effect evaporator (16), quintuple effect evaporator (18) are respectively equipped with an effect forced circulation pump, two effect forced circulation pumps, triple effect forced circulation pump, quadruple effect forced circulation pump, five effect forced circulation pumps.
3. one according to claim 1 is applied to Coal Chemical Industry high-salt wastewater recycling unit, it is characterized in that, described 1st effective evaporator (4), 2nd effect evaporator (6), triple effect evaporator (15), four-effect evaporator (16), quintuple effect evaporator (18) use, several size and the ratio producing water and the dense water water yield of nanofiltration according to nanofiltration of its effect, is usually arranged as quadruple effect or five effects; End effect secondary steam cools down and ensures vacuum by condenser, and end vacuum generally remains in-0.85��-0.90KPaG.
4. one according to claim 1 is applied to Coal Chemical Industry high-salt wastewater recycling unit, it is characterised in that described nanofiltration divides salt unit (1) to adopt NF membrane, and NF membrane aperture is 1��2nm.
5. one according to claim 1 is applied to Coal Chemical Industry high-salt wastewater recycling unit, it is characterised in that described effect flash tank (27) can by a kind of replacement in Oslo crystallizer, draft tube baffle crystallizer, DP crystallizer.
6. one according to claim 1 is applied to Coal Chemical Industry high-salt wastewater recycling unit, it is characterized in that, described aging mother liquid disposal unit (25) adopts a diaphragm type vacuum drying equipment, thermal source is the low-pressure steam of 0.5��1.0MPaG, the heat exchange of mother solution carries out under the environment of vacuum, and vacuum generally ensures at-70��-80KPaG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520974600.8U CN205295055U (en) | 2015-12-01 | 2015-12-01 | It puts to be applied to disguise of high salt waste water resource of coal industry |
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| CN201520974600.8U CN205295055U (en) | 2015-12-01 | 2015-12-01 | It puts to be applied to disguise of high salt waste water resource of coal industry |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105461134A (en) * | 2015-12-01 | 2016-04-06 | 陕西省石油化工研究设计院 | Technology and device applied to recycling of high-salinity wastewater in coal chemical industry |
| CN108409050A (en) * | 2018-04-17 | 2018-08-17 | 杭州碟滤膜技术有限公司 | A kind of Zero-discharge treating process of high-salt wastewater |
| CN109502871A (en) * | 2019-01-08 | 2019-03-22 | 山东蓝然环境科技有限公司 | A kind of high-salinity wastewater zero-emission and divide salt resource utilization device |
-
2015
- 2015-12-01 CN CN201520974600.8U patent/CN205295055U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105461134A (en) * | 2015-12-01 | 2016-04-06 | 陕西省石油化工研究设计院 | Technology and device applied to recycling of high-salinity wastewater in coal chemical industry |
| CN108409050A (en) * | 2018-04-17 | 2018-08-17 | 杭州碟滤膜技术有限公司 | A kind of Zero-discharge treating process of high-salt wastewater |
| CN108409050B (en) * | 2018-04-17 | 2020-12-25 | 杭州碟滤膜技术有限公司 | Zero-emission treatment process for high-salinity wastewater |
| CN109502871A (en) * | 2019-01-08 | 2019-03-22 | 山东蓝然环境科技有限公司 | A kind of high-salinity wastewater zero-emission and divide salt resource utilization device |
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