CN105217703A - A kind of sextuple-effect evaporation crystallization apparatus and technique thereof being applied to zero discharge of industrial waste water - Google Patents

A kind of sextuple-effect evaporation crystallization apparatus and technique thereof being applied to zero discharge of industrial waste water Download PDF

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Publication number
CN105217703A
CN105217703A CN201510741592.7A CN201510741592A CN105217703A CN 105217703 A CN105217703 A CN 105217703A CN 201510741592 A CN201510741592 A CN 201510741592A CN 105217703 A CN105217703 A CN 105217703A
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effect
heating chamber
pump
separator
evaporator heating
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蒋靖波
齐永红
孟旭光
薛群翔
马红鹏
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Shaanxi Research Design Institute of Petroleum and Chemical Industry
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Shaanxi Research Design Institute of Petroleum and Chemical Industry
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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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination

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Abstract

A kind of sextuple-effect evaporation crystallization apparatus and technique thereof being applied to zero discharge of industrial waste water, comprise six preheaters, six groups of vaporizers, desalination unit desalination and all the other element series operations, the first five preheater focuses on and reclaims evaporation condensed water waste heat, and the strong brine entering an effect is then heated to close to bubble point by end preheater; Front quadruple effect is falling-film evaporator, and rear two effects are pump feed evaporator, and front quadruple effect Main Function is for steaming water, and rear two effects focus on concentrated, are finally concentrated into the slip of certain solid content, by desalination unit desalination; The phlegma of evaporation and dense water heat exchange, make steam thermal energy be fully used, thus improve the utilization ratio of heat energy, and it can be widely used in every profession and trade evaporation desalination workshop section, is particularly useful for " zero " discharge treating system of trade effluent.

Description

A kind of sextuple-effect evaporation crystallization apparatus and technique thereof being applied to zero discharge of industrial waste water
Technical field
The invention belongs to industrial waste water treatment, be specifically related to a kind of sextuple-effect evaporation crystallization processes being applied to zero discharge of industrial waste water.
Background technology
Country's relevant policies explicitly call for promotes cycling utilization of wastewater in key industrys such as iron and steel, electric power, chemical industry, coals, strives for waste water and discharges less or zero release.In recent years, strict wastewater discharge standard has also been promulgated in some places in succession, and the serious responsive basin of the water pollutions such as the Yellow River, Huaihe River, regions and areas and province even do not allow industrial enterprise's discharge of wastewater to surface water body.Water resources and water environmental problems have become the bottleneck of restriction industrial sector development.Seek the waste water treatment process that treatment effect is better, technology stability is stronger, working cost is lower, realize the target of " wastewater zero discharge ", become the self-demand of chemical industry development and external requirement.
The water of productive use system being interpreted as enterprise or main unit to zero release in GB/T21534-2008 " process water water saving term " reaches arranges outward without trade effluent; It is generally acknowledged that coal chemical industrial waste water " zero release " is that the form Waste water concentrating that Coal Chemical Engineering Project produces being become solid or concentrated solution is processed again, and do not discharge any type of waste water to waters, earth's surface;
Common, coal chemical industrial waste water realizes efficient process and " zero release " of waste water by treatment of Organic Wastewater, brine waste process, strong brine process and high strong brine solidification treatment four workshop sections; Strong brine process is the gordian technique of restriction coal chemical industrial waste water " zero release "; This workshop section generally adopts (pre-treatment+membrane concentration) treatment process, concentrates strong brine further, makes TDS mass concentration reach 5000 ~ 8000mg/L, and then deliver to evaporation unit evaporation concentration, and the slip containing certain solid content after concentrated is then cured process; The evaporation operation that several evaporator series runs by multiple-effect evaporation, makes steam thermal energy repeatedly be utilized, thus improves the utilization ratio of heat energy, is used for the process of the aqueous solution.In the flow process of triple effect evaporation operation, first vaporizer (being called the first effect) is to give birth to steam as heating steam, all the other two (being called the second effect, triple effect) all using the secondary steam of its last effect as heating steam, thus significantly can reduce the consumption of raw steam.The secondary steam temperature of each effect is always lower than its heating steam, therefore the working pressure of respectively imitating during multiple-effect evaporation and solution boiling temperature reduce successively along steam flow direction.
CN103657122A discloses a kind of Sextuple-effect evaporation device, mainly comprises the following steps: strong brine carries out UTILIZATION OF VESIDUAL HEAT IN by preheater, enters effect to six effect afterwards successively; Salinity concentrates in rear two effects, and the slip after concentrated delivers to inorganic salt crystallization workshop section.Before this invention, quadruple effect is falling film evaporation, and because of by minimum charging quantitative limitation, feed loading is limited to, and falling-film evaporator is easy to fouling, and effect body is washed frequently, and device cannot steady running; Five, the steam capability of six effects is about only the half of front quadruple effect, a big chunk secondary steam must be branched to secondary condenser when feed loading is larger, and without variable valve in shunt conduit, operation easier is large, cause the loss of energy, five effect evaporations can only be can be regarded as by the words of economy definition; Six effect unloading position are not too suitable, occur the risk of line clogging.
Trade effluent " zero release " multiple-effect evaporation many employings triple effect evaporation+two effect concentration and crystallization process of current domestic enterprise, the method running and comparing is stablized, but because its effect number is less, Btu utilization is very inabundant, and economic benefits are poor; And vaporizer generally adopts pump feed evaporator, volume is large, and cost is high; Comprehensive economy is poor.
Six effects are as a kind of evaporation unit, and it is in tail end in industrial water supply " zero release ", and bearing of task is also very huge; The composition of trade effluent is complicated and change greatly, so it is comparatively large to cause evaporation unit to run difficulty, and be different from other workshop sections, upland water must process at this evaporation section, otherwise leads a dynamic whole body, and whole " zero release " all cannot steady running; In certain aspect, the whether normal steady running for whole device of this device plays a decisive role.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of this invention is to provide a kind of sextuple-effect evaporation crystallization processes being applied to zero discharge of industrial waste water, improve trade effluent " zero release " and evaporate the desalination workshop section multi-effect evaporating device effect number upper limit, perfectly realize multi-stage heat to utilize, reduce unit Treatment of Industrial Water cost further.
To achieve these goals, the technical solution used in the present invention is:
A kind of sextuple-effect evaporation crystallization apparatus being applied to zero discharge of industrial waste water, comprise strong brine import, circulating backwater outlet, make-up cooling water import, abraum salt outlet, reuse water outlet, raw steam inlet, raw steam condensate outlet, strong brine import is communicated with secondary condenser by secondary condenser strong brine variable valve; Secondary condenser, quadruple effect preheater, triple effect preheater, two effect preheaters, an effect preheater are communicated with successively; One effect preheater discharge port connects end preheater opening for feed, and end preheater discharge port is communicated with an effect separator opening for feed, triple effect separator opening for feed by switch-valve N, switch-valve O; One effect separator, two effect separators, triple effect separator, quadruple effect separator, intermediate buffer tank, five effect separators, six effect separators, desalination press filtration unit are communicated with successively; Desalination press filtration unit one discharge port is communicated with intermediate buffer tank opening for feed, and another discharge port is communicated with abraum salt outlet; Five effect separators, six effect separators are communicated with desalination press filtration unit by variable valve D, variable valve E;
Described steam inlet is communicated with 1st effective evaporator heating chamber inlet mouth by the raw steam regulating valve of an effect, the raw steam regulating valve of end preheater, switch-valve P, and 1st effective evaporator heating chamber liquid-vapor mixture outlet and is imitated separator and is communicated with; One effect separator, 2nd effect evaporator heating chamber, two effect separators, triple-effect evaporator heating chamber, triple effect separator, quadruple effect evaporator heating chamber, quadruple effect separator are communicated with successively, the outlet of quadruple effect separator secondary steam imitates the secondary steam import of pump feed evaporator heating chamber and secondary condenser secondary steam inlet communication by five effect secondary steam variable valve, secondary condenser secondary steam variable valve and five, and quadruple effect separator is imitated separator by switch-valve A and two and is communicated with; Five effect pump feed evaporator heating chambers, five effect separators, six effect pump feed evaporator heating chambers, six effect separators, main condenser are communicated with successively; The outlet of main condenser communication loop backwater, make-up cooling water import; Two effect preheaters are communicated with triple-effect evaporator heating chamber by switch-valve C, and triple-effect evaporator heating chamber is communicated with end preheater by switch-valve B;
Described end preheater condensation-water drain is communicated with 1st effective evaporator heating chamber, and 1st effective evaporator heating chamber condensate outlet and is imitated preheater hot source inlet and is communicated with; 2nd effect evaporator heating chamber phlegma and two is imitated preheater hot source inlet and is communicated with; Triple-effect evaporator heating chamber phlegma is communicated with triple effect preheater hot source inlet; Quadruple effect evaporator heating chamber phlegma is communicated with quadruple effect preheater hot source inlet; One effect preheater condensate outlet pipeline connects condensate outlet; Two effect preheater phlegmas, triple effect preheater phlegma, quadruple effect preheater phlegma, five effect pump feed evaporator heating chamber phlegmas, six effect pump feed evaporator heating chamber phlegmas, secondary condenser phlegma and main condenser phlegma converge rear reuse water outlet; Wherein imitate phlegma topping-up pumps, secondary condenser phlegma topping-up pump, main condenser phlegma topping-up pump to the supercharging of pipeline phlegma by an effect phlegma topping-up pump, two effect phlegma topping-up pumps, triple effect phlegma topping-up pump, quadruple effect phlegma topping-up pump, five effect phlegma topping-up pumps, six;
A described effect separator, two effect separators, triple effect separator, quadruple effect separator, intermediate buffer tank, five effect separators, six effect separators are by an effect discharging pump, two effect discharging pumps, triple effect discharging pump, quadruple effect discharging pump, intermediate buffer tank discharging pump, five effect discharging pumps, six effect discharging pumps control discharging, by an effect discharging variable valve, two effect discharging variable valve, triple effect discharging variable valve, quadruple effect discharging variable valve, intermediate buffer tank discharging governor valve control discharging speed, by an effect recycle pump, two effect recycle pumps, triple effect cycle pump, quadruple effect recycle pump, five effect forced circulation pumps, six effect forced circulation pumps are to an effect falling-film evaporator heating chamber, two effect falling-film evaporator heating chambers, triple effect falling-film evaporator heating chamber, for quadruple effect falling-film evaporator heating chamber, five effect pump feed evaporator heating chambers, six effect pump feed evaporator heating chamber circulation material conveyings, by switch-valve F, switch-valve J, switch-valve H, switch-valve I, switch-valve J, switch-valve K, switch-valve L, switch-valve M controls an effect separator respectively, two effect separators, triple effect separator, the switch of quadruple effect separator pipeline, by an effect circulating regulation valve, two effect circulating regulation valves, triple effect cycle variable valve, quadruple effect circulating regulation valve adjust flux.
Described 1st effective evaporator heating chamber and an effect separator composition 1st effective evaporator, 2nd effect evaporator heating chamber and two effect separator composition 2nd effect evaporators, triple-effect evaporator heating chamber and triple effect separator composition triple-effect evaporator, quadruple effect evaporator heating chamber and quadruple effect separator composition quadruple effect evaporator, 1st effective evaporator, 2nd effect evaporator, triple-effect evaporator, quadruple effect evaporator is falling-film evaporator, five effect pump feed evaporator heating chambers, five effect separators and five effect forced circulation pump composition quintuple effect evaporators, six effect pump feed evaporator heating chambers, six effect separators and six effect forced circulation pump composition sextuple-effect evaporators, quintuple effect evaporator, sextuple-effect evaporator adopts pump feed evaporator.
Described charging divides halfload charging and full load charging, is realized half/full load of each several part by switch valve switch-valve E, switch-valve F, switch-valve J, switch-valve H, switch-valve I, switch-valve J, switch-valve K, switch-valve L.
The vacuum tightness of described whole system is maintained by water ring vacuum pump, and vacuum tightness is-75 ~-80KPa, increases broken vacant duct and broken empty variable valve simultaneously.
Described works as closing switch valve A, switch-valve B, switch-valve O, when other switch-valves are opened, system adopts one, two, three, four, five, six effect operational modes, for sextuple-effect evaporation, can by maximum 110% load operation, as closing switch valve B, switch-valve C, switch-valve O, when other switch-valves are opened, system adopts one, two, five, six effect operational modes, for four-effect evaporation, can by maximum 60% load operation, as closing switch valve P, switch-valve A, switch-valve C, switch-valve N, when other switch-valves are opened, system adopts three, four, five, six effect operational modes, for four-effect evaporation, can by maximum 60% load operation.
A described effect recycle pump, an effect discharging pump, two effect recycle pumps, two effect discharging pumps, triple effect cycle pump, triple effect discharging pump overcurrent part material adopt dual phase steel 2205, and can not carry solid-liquid mixed stream; Quadruple effect recycle pump, quadruple effect discharging pump overcurrent part material adopt dual phase steel 2205, and allow the mixing of conveying solid-liquid, and solid content is not more than 5%m fluid; Five effect forced circulation pumps and six effect forced circulation pumps are propeller pump, and overcurrent part material adopts dual phase steel 2605; End preheater, an effect preheater, two effect preheaters, triple effect preheater, quadruple effect preheater are shell and tube heat exchanger, and its heat transfer tube material is TA2, and other materials are Stainless steel 316 L; 1st effective evaporator heating chamber, 2nd effect evaporator heating chamber, triple-effect evaporator heating chamber, quadruple effect evaporator heating chamber adopt tube-type down-flow evaporator, and heat transfer tube material is TA10 and TA2, and other materials are Stainless steel 316 L.
Be applied to a sextuple-effect evaporation crystallization processes for zero discharge of industrial waste water, this technique comprises the following steps:
1) strong brine that strong brine import flows into passes through secondary condenser successively, quadruple effect preheater, triple effect preheater, two effect preheaters, one effect preheater preheats, temperature 25 ~ 30 degree, pressure is 0.7MPaG, salts contg is 6%m, quadruple effect preheater, triple effect preheater, two effect preheaters, one effect preheater heat reclaims, regulated by an effect steam regulating valve and end preheater steam regulating valve, 1st effective evaporator heating chamber is entered after strong brine being heated to 122 DEG C, the steam water interface that 1st effective evaporator heating chamber produces is separated in an effect separator, when there being certain liquid level in an effect separator, startup one effect recycle pump carries out strong brine self-separation device and circulates to 1st effective evaporator heating chamber, adopt the steam of 0.5MPaG, temperature is 159 DEG C, service temperature is, shell side 130 DEG C, tube side 125 DEG C, part water in strong brine is evaporated away, discharge concentration is 7.3%m, vapour phase delivers to 2nd effect evaporator heating chamber as an effect secondary steam,
2) by an effect discharging governor valve control liquid level after, by an effect discharging pump, unevaporated strong brine is delivered to two effect separators, when there being certain liquid level in two effect separators, startup two effect recycle pumps carry out strong brine self-separation device and circulate to 2nd effect evaporator heating chamber, 2nd effect evaporator heating chamber adopts from the isolated Secondary-steam heating of an effect separator from the isolated strong brine of an effect separator, make the strong brine evaporation of part, the secondary steam that 1st effective evaporator heating chamber produces, temperature is 124 DEG C, then 2nd effect evaporator heating chamber service temperature is, shell side 124 DEG C, tube side 119 DEG C, the steam water interface that 2nd effect evaporator heating chamber produces is separated in two effect separators, part water in strong brine is evaporated away, discharge concentration is 9.5%m, vapour phase delivers to triple-effect evaporator heating chamber as two effect secondary steams,
3) by two effect discharging governor valve control liquid levels after, by two effect discharging pumps, unevaporated strong brine is delivered to triple effect separator, when there being certain liquid level in triple effect separator, startup triple effect cycle pump carries out strong brine self-separation device and circulates to triple-effect evaporator heating chamber, triple-effect evaporator heating chamber adopts from the isolated Secondary-steam heating of two effect separators from the isolated strong brine of two effect separators, make the strong brine evaporation of part, the secondary steam that 2nd effect evaporator heating chamber produces, temperature is 118 DEG C, then triple-effect evaporator heating chamber service temperature is, shell side 118 DEG C, tube side 113 DEG C, the steam water interface that triple-effect evaporator heating chamber produces is separated in triple effect separator, part water in strong brine is evaporated away, discharge concentration is 13.3%m, vapour phase delivers to quadruple effect evaporator heating chamber as triple effect secondary steam,
4) by triple effect discharging governor valve control liquid level after, by triple effect discharging pump, unevaporated strong brine is delivered to quadruple effect separator, when there being certain liquid level in quadruple effect separator, startup quadruple effect recycle pump carries out strong brine self-separation device and circulates to quadruple effect evaporator heating chamber, quadruple effect evaporator heating chamber adopts from the isolated Secondary-steam heating of triple effect separator from the isolated strong brine of triple effect separator, make the strong brine evaporation of part, the secondary steam that triple-effect evaporator heating chamber produces, temperature is 112 DEG C, then quadruple effect evaporator heating chamber service temperature is, shell side 112 DEG C, tube side 107 DEG C, the steam water interface that quadruple effect evaporator heating chamber produces is separated in quadruple effect separator, part water in strong brine is evaporated away, discharge concentration is 22.3%m, vapour phase delivers to five effect pump feed evaporator heating chambers as quadruple effect secondary steam,
5) by quadruple effect discharging governor valve control liquid level after, by quadruple effect discharging pump, unevaporated strong brine is delivered to intermediate buffer tank, when intermediate buffer tank has certain liquid level, starting intermediate buffer tank discharging pump delivers on the inlet duct of five effect forced circulation pumps by strong brine, the liquid level of intermediate buffer tank is controlled by intermediate buffer tank variable valve, when five effect separators are for certain high liquid level, start five effect forced circulation pumps, make strong brine in five effect forced circulation pump high speed circulations, quadruple effect evaporator heating chamber produce secondary steam in unit capacity lower than 70m 3during/h, do not shunt, all enter five effect pump feed evaporator heating chambers, when treatment capacity is greater than 70m 3during/h, five effect pump feed evaporator heating chambers adopt the strong brine come from intermediate buffer tank from the isolated Secondary-steam heating of quadruple effect separator, make the strong brine evaporation of part, vehicle repair major in circulation fluid is imitated in separator at top five and is separated, the secondary steam that quadruple effect evaporator heating chamber produces, temperature is 106 DEG C, then quintuple effect evaporator heating chamber service temperature is, shell side 106 DEG C, tube side 84 DEG C, part water in strong brine is evaporated away, discharging salts contg is 29%m, wherein solid salt content is 5 ~ 10%m, vapour phase delivers to six effect pump feed evaporator heating chambers as five effect secondary steams,
6) start five effect discharging pumps after unevaporated strong brine to be delivered on the inlet duct of six effect forced circulation pumps, when six effect separators are for certain high liquid level, start six effect forced circulation pumps, make strong brine in six effect forced circulation pump high speed circulating and evaporating, and remaining moisture is evaporated, carry out strong brine to concentrate simultaneously, until there is a certain amount of crystal salt in six effect circulation fluids, six effect pump feed evaporator heating chambers adopt isolates Secondary-steam heating from the isolated strong brine of five effect separators from five effect separators, make the strong brine evaporation of part, vehicle repair major in circulation fluid is imitated in separator at top six and is separated, the part secondary steam that five effect forcing vaporiser heating chambers produce, temperature is 83 DEG C, then sextuple-effect evaporator heating chamber service temperature is, shell side 83 DEG C, tube side 61 DEG C, water base for residue in former strong brine is evaporated, discharging salts contg is 42%m, wherein solid salt content is 10 ~ 25%m, vapour phase delivers to main condenser condensing cooling as six effect secondary steams,
7) when six effect circulation fluids in containing have an appointment 10 ~ 25%m crystal salt time, start six effect discharging pumps and slip is delivered to desalination press filtration unit, desalination press filtration unit adopts press filtration mode, when pressure filter formed certain thickness and the filter cake of moisture content less time, salt discharge is sent outside, the saturated filtrate that press filtration produces then is back to intermediate buffer tank and again evaporates salt, slurry condition to make the salt entering pressure filter, therefore the saturated brine that press filtration is complete, salts contg 23%m, all the time pass back into five effect pump feed evaporator heating chambers, vacuum tightness remains on-0.75 ~-0.8MPaG simultaneously.
Imitate phlegma topping-up pump by one after the phlegma that described end preheater phlegma and 1st effective evaporator heating chamber produce converges and deliver to an effect preheater, as the heat source strong brine of an effect preheater, after heating, this part saturation steam phlegma is delivered to out-of-bounds associated pipe and reclaim; The phlegma that 2nd effect evaporator heating chamber produces delivers to two effect preheaters by two effect phlegma topping-up pumps, and as the heat source strong brine of two effect preheaters, condensate outlet delivered to by the phlegma after heating; The phlegma that triple-effect evaporator heating chamber produces delivers to triple effect preheater by triple effect phlegma topping-up pump, and as the heat source strong brine of triple effect preheater, condensate outlet delivered to by the phlegma after heating; The phlegma that quadruple effect evaporator heating chamber produces delivers to quadruple effect preheater by quadruple effect phlegma topping-up pump, and as the heat source strong brine of quadruple effect preheater, the phlegma after heating send condensate outlet; The phlegma that five effect pump feed evaporator heating chambers produce delivers to condensate outlet by five effect phlegma topping-up pumps; The phlegma that six effect pump feed evaporator heating chambers produce delivers to condensate outlet by six effect phlegma topping-up pumps; Phlegma withdrawing can is delivered to by main condenser phlegma topping-up pump after the phlegma that secondary condenser produces and the phlegma that main condenser produces converge, the refrigerant of described main condenser is recirculated cooling water, recirculated cooling water can adopt the whole audience to produce water coolant or from cooling tower systems, cooled by cooling water condensation, the whole condensation of the secondary steam in main condenser is also reclaimed.
It is described when in water quality, COD and PH is too high, the part secondary steam that quadruple effect separator can be produced branches to secondary condenser by the five effect secondary steam variable valve controlled into secondary condenser, thus reduces the secondary steam amount into five effect pump feed evaporator heating chambers; In order to strengthen the resistibility of falling-film evaporator to dirty salt, front quadruple effect evaporator heating chamber increases recycle pump, and the flow of recycle pump adjusts by variable valve; In order to strengthen the susceptibility of five, six effects to COD and PH in strong brine, increase the secondary steam pipeline that quadruple effect evaporator heating chamber increases to secondary condenser, and by quadruple effect to the governor valve control quadruple effect on secondary condenser secondary steam pipeline to the secondary steam amount of secondary condenser.
Described steam can as the thermal source of 1st effective evaporator heating chamber, also can as the thermal source of triple-effect evaporator heating chamber, end preheater outlet strong brine can remove an effect separator, also can remove triple effect separator, two effect separators produce secondary steams also directly can remove five effect pump feed evaporator heating chambers, thus realize one, two, five, six effect operational modes, three, four, five, six effect operational modes and one, two, three, four, five, six effect operational modes.
The invention has the beneficial effects as follows:
1) by this art breading high-salt wastewater, the moisture in strong brine all can be reclaimed, thus realize " zero release " of water; Salt is then by pressure filter, and finally carry out landfill disposal with the form being dry mixed salt (water content is not higher than 5%m), efficiency of utilization is high, and steam-water ratio is only 0.21 ~ 0.22, namely evaporates the low-pressure steam that 1 ton of water only needs 0.21 ~ 0.22 ton; And the triple effect of traditional technology, quadruple effect technique steam-water ratio are respectively 0.4,0.32;
2) energy-saving effect is apparent, and because of the repeatedly efficiency utilization of steam thermal energy, and each preheater is for the recovery of phlegma sensible heat, makes whole device have very high economy;
3) adopt efficient outer circulation falling-film evaporator, improve the present situation of the easy fouling of falling-film evaporator, improve work-ing life greatly;
4) utilize pump feed evaporator to finish up concentrated, make discharge concentration more reliable, ensure out the reliable and stable of salt;
5) adopt multiple modes of operation, apparatus of the present invention turndown ratio improved greatly, ensure stable while carry out other several effects cleaning resume work.
7) adopt sextuple-effect evaporation technique, compared to traditional triple effect evaporation technique, heat utilization efficiency is higher, and energy-saving effect is better; To process 115t/h strong brine, year save quantity of steam be not less than 150,000 tons, year energysaving effectiveness be not less than 2,000 ten thousand yuan (low-pressure steam price is with 130 yuan/ton of calculating);
8) front quadruple effect adopts falling-film evaporator, focuses on steaming water and concentrates; Rear two effects adopt pump feed evaporator, and crystallization goes out salt; Because falling-film evaporator heat transfer coefficient is high, therefore required effective temperature difference is less, so the limited temperature difference can be used in pump feed evaporator; As all adopted pump feed evaporator, economically (raw steam grade is 0.5MPaG), industrial high-salt wastewater process can accomplish 5 effects at most, but not six effects; Integrate two kinds of vaporizer patterns, finally make energy-conservation and maximization of economic benefit.
9) adopt multistage preheating, the heat of internal system is fully utilized, further Optimization of Energy Saving effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is process flow sheet of the present invention;
Wherein, 1 is end preheater; 2 is 1st effective evaporator heating chamber; 3 is an effect preheater; 4 is 2nd effect evaporator heating chamber; 5 is two effect preheaters; 6 is triple-effect evaporator heating chamber; 7 is triple effect preheater; 8 is quadruple effect evaporator heating chamber; 9 is quadruple effect preheater; 10 is five effect pump feed evaporator heating chambers; 11 is six effect pump feed evaporator heating chambers; 12 is secondary condenser; 13 is main condenser; 14 is an effect separator; 15 is two effect separators; 16 is triple effect separator; 17 is quadruple effect separator; 18 is intermediate buffer tank; 19 is five effect separators; 20 is six effect separators; 21 is an effect recycle pump; 22 is an effect discharging pump; 23 is two effect recycle pumps; 24 is two effect discharging pumps; 25 is triple effect cycle pump; 26 is triple effect discharging pump; 27 is quadruple effect recycle pump; 28 is quadruple effect discharging pump; 29 is intermediate buffer tank discharging pump; 30 is five effect forced circulation pumps; 31 is five effect discharging pumps; 32 is six effect forced circulation pumps; 33 is six effect discharging pumps; 34 is water ring vacuum pump; 35 is filtrate backflow transferpump; 36 is an effect phlegma topping-up pump; 37 is two effect phlegma topping-up pumps; 38 is triple effect phlegma topping-up pump; 39 is quadruple effect phlegma topping-up pump; 40 is five effect phlegma topping-up pumps; 41 is six effect phlegma topping-up pumps; 42 is secondary condenser phlegma topping-up pump; 43 is main condenser phlegma topping-up pump; 44 is the raw steam regulating valve of an effect; 45 is the raw steam regulating valve of end preheater; 46 is switch-valve P; 47 is an effect circulating regulation valve; 48 is an effect discharging variable valve; 49 is two effect circulating regulation valves; 50 is two effect discharging variable valve; 51 is switch-valve A; 52 is switch-valve B; 53 is switch-valve C; 54 is triple effect cycle variable valve; 55 is triple effect discharging variable valve; 56 is quadruple effect circulating regulation valve; 57 is quadruple effect discharging variable valve; 58 is five effect secondary steam variable valve; 59 is intermediate buffer tank discharging variable valve; 60 is secondary condenser secondary steam variable valve; 61 is secondary condenser strong brine variable valve; 62 is broken empty variable valve; 63 is switch-valve D; 64 is switch-valve E; 65 is switch-valve F; 66 is switch-valve J; 67 is switch-valve H; 68 is switch-valve I; 69 is switch-valve J; 70 is switch-valve K; 71 is switch-valve L; 72 is switch-valve M; 73 is switch-valve N; 74 is switch-valve O; 75 is desalination press filtration unit; 76 is strong brine import; 77 is circulating backwater outlet; 78 is make-up cooling water import; 79 is abraum salt outlet; 80 reuse water outlets; 81 is steam inlet; 82 is condensate outlet.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
As shown in Figure 1, a kind of sextuple-effect evaporation crystallization apparatus being applied to zero discharge of industrial waste water, comprise strong brine import 76, circulating backwater outlet 77, make-up cooling water import 78, abraum salt outlet 79, reuse water outlet 80, raw steam inlet 81, raw steam condensate outlet 82, strong brine import 76 is communicated with secondary condenser 12 by secondary condenser strong brine variable valve 61; Secondary condenser 12, quadruple effect preheater 9, triple effect preheater 7, two effect preheater 5, is imitated preheater 3 and is communicated with successively; One effect preheater 3 discharge port connects end preheater 1 opening for feed, and end preheater 1 discharge port is communicated with effect separator 14 opening for feed, triple effect separator 16 opening for feed by switch-valve N73, switch-valve O74; One effect separator 14, two effect separator 15, triple effect separator 16, quadruple effect separator 17, intermediate buffer tank 18, five imitate separator 19, six effect separator 20, desalination press filtration unit 75 is communicated with successively; Desalination press filtration unit 75 1 discharge port is communicated with intermediate buffer tank 18 opening for feed, and another discharge port is communicated with abraum salt outlet 79; Five effect separators 19, six are imitated separator 20 and are communicated with desalination press filtration unit 75 by variable valve D63, variable valve E64;
Described steam inlet 81 is communicated with 1st effective evaporator heating chamber 2 inlet mouth by the raw steam regulating valve 44 of an effect, the raw steam regulating valve 45 of end preheater, switch-valve P46, and 1st effective evaporator heating chamber 2 liquid-vapor mixture outlet and is imitated separator 14 and is communicated with; One effect separator 14,2nd effect evaporator heating chamber 4, two effect separator 15, triple-effect evaporator heating chamber 6, triple effect separator 16, quadruple effect evaporator heating chamber 6, quadruple effect separator 17 are communicated with successively, the outlet of quadruple effect separator 17 secondary steam imitates pump feed evaporator heating chamber 10 secondary steam import and secondary condenser 12 secondary steam inlet communication by five effect secondary steam variable valve 58, secondary condenser secondary steam variable valve 60 and five, and quadruple effect separator 17 is imitated separator 15 by switch-valve A51 and two and is communicated with; Five effect pump feed evaporator heating chambers 10, five imitate separator 19, six effect pump feed evaporator heating chamber 11, six effect separator 20, main condenser 13 is communicated with successively; Main condenser 13 communication loop backwater outlet 77, make-up cooling water import 78; Two effect preheaters 5 are communicated with triple-effect evaporator heating chamber 6 by switch-valve C53, and triple-effect evaporator heating chamber 6 is communicated with end preheater 1 by switch-valve B52;
Described end preheater 1 condensation-water drain is communicated with 1st effective evaporator heating chamber 2, and 1st effective evaporator heating chamber 2 condensate outlet and is imitated preheater 3 thermal source inlet and is communicated with; 2nd effect evaporator heating chamber 4 phlegma and two is imitated preheater 5 thermal source inlet and is communicated with; Triple-effect evaporator heating chamber 6 phlegma is communicated with triple effect preheater 7 thermal source inlet; Quadruple effect evaporator heating chamber 8 phlegma is communicated with quadruple effect preheater 9 thermal source inlet; One effect preheater 3 condensate outlet pipeline connects condensate outlet 82; Two effect preheater 5 phlegmas, triple effect preheater 7 phlegma, quadruple effect preheater 9 phlegma, five effect pump feed evaporator heating chamber 10 phlegmas, six effect pump feed evaporator heating chamber 10 phlegmas, secondary condenser 12 phlegma and main condenser 13 phlegma converge rear reuse water outlet 80 and are communicated with; Wherein imitate phlegma topping-up pump 37, triple effect phlegma topping-up pump 38, quadruple effect phlegma topping-up pump 39, five effect phlegma topping-up pump 40, six effect phlegma topping-up pump 41, secondary condenser phlegma topping-up pump 42, the supercharging of main condenser phlegma topping-up pump 43 pairs of pipeline phlegmas by an effect phlegma topping-up pump 36, two;
A described effect separator 14, two effect separators 15, triple effect separator 16, quadruple effect separator 17, intermediate buffer tank 18, five effect separators 19, six effect separators 20 are by an effect discharging pump 22, two effect discharging pumps 24, triple effect discharging pump 26, quadruple effect discharging pump 28, intermediate buffer tank discharging pump 29, five effect discharging pumps 31, six effect discharging pumps 32 control discharging, by an effect discharging variable valve 48, two effect discharging variable valve 50, triple effect discharging variable valve 55, quadruple effect discharging variable valve 57, intermediate buffer tank discharging variable valve 59 controls discharging speed, by an effect recycle pump 21, two effect recycle pumps 22, triple effect cycle pump 25, quadruple effect recycle pump 27, five effect forced circulation pumps 30, six effect forced circulation pumps 32 are to an effect falling-film evaporator heating chamber 2, two effect falling-film evaporator heating chambers 4, triple effect falling-film evaporator heating chamber 6, for quadruple effect falling-film evaporator heating chamber 8, five effect pump feed evaporator heating chambers 10, six effect pump feed evaporator heating chamber 11 circulation material conveyings, by switch-valve F65, switch-valve J66, switch-valve H67, switch-valve I68, switch-valve J69, switch-valve K70, switch-valve L71, switch-valve M72 controls an effect separator 14 respectively, two effect separators 15, triple effect separator 16, the switch of quadruple effect separator 17 pipeline, by an effect circulating regulation valve 47, two effect circulating regulation valves 49, triple effect cycle variable valve 54, quadruple effect circulating regulation valve 56 adjust flux.
Described 1st effective evaporator heating chamber 2 and an effect separator 14 form 1st effective evaporator, 2nd effect evaporator heating chamber 4 and two effect separators 15 form 2nd effect evaporator, triple-effect evaporator heating chamber 6 and triple effect separator 16 form triple-effect evaporator, quadruple effect evaporator heating chamber 8 and quadruple effect separator 17 form quadruple effect evaporator, 1st effective evaporator, 2nd effect evaporator, triple-effect evaporator, quadruple effect evaporator is falling-film evaporator, five effect pump feed evaporator heating chambers 10, five effect separator 19 and five effect forced circulation pumps 30) composition quintuple effect evaporator, six effect pump feed evaporator heating chambers 11, six effect separators 20 and six effect forced circulation pumps 32 form sextuple-effect evaporator, quintuple effect evaporator, sextuple-effect evaporator adopts pump feed evaporator.
Described charging divides halfload charging and full load charging, is realized half/full load of each several part by switch valve switch-valve E65, switch-valve F66, switch-valve J67, switch-valve H68, switch-valve I69, switch-valve J70, switch-valve K71, switch-valve L72.
The vacuum tightness of described whole system is maintained by water ring vacuum pump 34, and vacuum tightness is-75 ~-80KPa, increases broken vacant duct and broken empty variable valve 62 simultaneously.
Described works as closing switch valve A51, switch-valve B52, switch-valve O74, when other switch-valves are opened, system adopts one, two, three, four, five, six effect operational modes, for sextuple-effect evaporation, can by maximum 110% load operation, as closing switch valve B52, switch-valve C53, switch-valve O74, when other switch-valves are opened, system adopts one, two, five, six effect operational modes, for four-effect evaporation, can by maximum 60% load operation, as closing switch valve P46, switch-valve A51, switch-valve C53, switch-valve N73, when other switch-valves are opened, system adopts three, four, five, six effect operational modes, for four-effect evaporation, can by maximum 60% load operation.
A described effect recycle pump 21, is imitated discharging pump 22, two and is imitated recycle pump 23, two effect discharging pump 24, triple effect cycle pump 25, triple effect discharging pump 26 overcurrent part material employing dual phase steel 2205, and can not carry solid-liquid mixed stream; Quadruple effect recycle pump 27, quadruple effect discharging pump 28 overcurrent part material adopt dual phase steel 2205, and allow the mixing of conveying solid-liquid, and solid content is not more than 5%m fluid; Five effect forced circulation pumps 30 and six effect forced circulation pumps 32 are propeller pump, and overcurrent part material adopts dual phase steel 2605; End preheater 1, one effect preheater 3, two effect preheater 5, triple effect preheater 7, quadruple effect preheater 9 are shell and tube heat exchanger, and its heat transfer tube material is TA2, and other materials are Stainless steel 316 L; 1st effective evaporator heating chamber 2,2nd effect evaporator heating chamber 4, triple-effect evaporator heating chamber 6, quadruple effect evaporator heating chamber 8 adopt tube-type down-flow evaporator, and heat transfer tube material is TA10 and TA2, and other materials are Stainless steel 316 L.
As shown in Figure 1 and Figure 2, a kind of sextuple-effect evaporation crystallization processes being applied to zero discharge of industrial waste water, this technique comprises the following steps:
1) strong brine that strong brine import 76 flows into passes through secondary condenser 12 successively, quadruple effect preheater 9, triple effect preheater 7, two effect preheaters 5, one effect preheater 3 preheating, temperature 25 ~ 30 degree, pressure is 0.7MPaG, salts contg is 6%m, quadruple effect preheater 9, triple effect preheater 7, two effect preheaters 5, one effect preheater 3 heat recuperation, regulated by an effect steam regulating valve 44 and end preheater steam regulating valve 45, 1st effective evaporator heating chamber 2 is entered after strong brine being heated to 122 DEG C, the steam water interface that 1st effective evaporator heating chamber 2 produces is separated in an effect separator 14, when there being certain liquid level in an effect separator 14, startup one effect recycle pump 21 carries out strong brine self-separation device and circulates to 1st effective evaporator heating chamber 2, adopt the steam of 0.5MPaG, temperature is 159 DEG C, service temperature is, shell side 130 DEG C, tube side 125 DEG C, part water in strong brine is evaporated away, discharge concentration is 7.3%m, vapour phase delivers to 2nd effect evaporator heating chamber 4 as an effect secondary steam,
2) by effect discharging governor valve control 48 liquid level after, by an effect discharging pump 22, unevaporated strong brine is delivered to two effect separators 15, when there being certain liquid level in two effect separators 15, startup two effect recycle pumps 23 carry out strong brine self-separation device and circulate to 2nd effect evaporator heating chamber 4, 2nd effect evaporator heating chamber 4 adopts from the isolated Secondary-steam heating of an effect separator 14 from the isolated strong brine of an effect separator 14, make the strong brine evaporation of part, the secondary steam that 1st effective evaporator heating chamber 2 produces, temperature is 124 DEG C, then 2nd effect evaporator heating chamber 4 service temperature is, shell side 124 DEG C, tube side 119 DEG C, the steam water interface that 2nd effect evaporator heating chamber 4 produces is separated in two effect separators 15, part water in strong brine is evaporated away, discharge concentration is 9.5%m, vapour phase delivers to triple-effect evaporator heating chamber 6 as two effect secondary steams,
3) liquid level is controlled by two effect discharging variable valve 50 after, by two effect discharging pumps 24, unevaporated strong brine is delivered to triple effect separator 16, when there being certain liquid level in triple effect separator 16, startup triple effect cycle pump 25 carries out strong brine self-separation device and circulates to triple-effect evaporator heating chamber 6, triple-effect evaporator heating chamber 6 adopts from the isolated Secondary-steam heating of two effect separators 15 from the isolated strong brine of two effect separators 15, make the strong brine evaporation of part, the secondary steam that 2nd effect evaporator heating chamber 4 produces, temperature is 118 DEG C, then triple-effect evaporator heating chamber 6 service temperature is, shell side 118 DEG C, tube side 113 DEG C, the steam water interface that triple-effect evaporator heating chamber 6 produces is separated in triple effect separator 15, part water in strong brine is evaporated away, discharge concentration is 13.3%m, vapour phase delivers to quadruple effect evaporator heating chamber 8 as triple effect secondary steam,
4) liquid level is controlled by triple effect discharging variable valve 55 after, by triple effect discharging pump 28, unevaporated strong brine is delivered to quadruple effect separator 17, when there being certain liquid level in quadruple effect separator 17, startup quadruple effect recycle pump 27 carries out strong brine self-separation device and circulates to quadruple effect evaporator heating chamber 8, quadruple effect evaporator heating chamber 8 adopts from the isolated Secondary-steam heating of triple effect separator 16 from the isolated strong brine of triple effect separator 16, make the strong brine evaporation of part, the secondary steam that triple-effect evaporator heating chamber 6 produces, temperature is 112 DEG C, then quadruple effect evaporator heating chamber 8 service temperature is, shell side 112 DEG C, tube side 107 DEG C, the steam water interface that quadruple effect evaporator heating chamber 8 produces is separated in quadruple effect separator 17, part water in strong brine is evaporated away, discharge concentration is 22.3%m, vapour phase delivers to five effect pump feed evaporator heating chambers 10 as quadruple effect secondary steam,
5) liquid level is controlled by quadruple effect discharging variable valve 57 after, by quadruple effect discharging pump 28, unevaporated strong brine is delivered to intermediate buffer tank 18, when intermediate buffer tank 18 has certain liquid level, starting intermediate buffer tank discharging pump 29 delivers on the inlet duct of five effect forced circulation pumps 30 by strong brine, the liquid level of intermediate buffer tank 18 is controlled by intermediate buffer tank variable valve 59, when five effect separators 19 possess certain high liquid level, start five effect forced circulation pumps 30, make strong brine in five effect forced circulation pump 30 high speed circulations, quadruple effect evaporator heating chamber 8 produce secondary steam in unit capacity lower than 70m 3during/h, do not shunt, all enter five effect pump feed evaporator heating chambers 10, when treatment capacity is greater than 70m 3during/h, five effect pump feed evaporator heating chambers 10 adopt from the strong brine of the isolated Secondary-steam heating of quadruple effect separator 17 from intermediate buffer tank 18, make the strong brine evaporation of part, vehicle repair major in circulation fluid is imitated at top five in separator 19 and is separated, the secondary steam that quadruple effect evaporator heating chamber 8 produces, temperature is 106 DEG C, then quintuple effect evaporator heating chamber 10 service temperature is, shell side 106 DEG C, tube side 84 DEG C, part water in strong brine is evaporated away, discharging salts contg is 29%m, wherein solid salt content is 5 ~ 10%m, vapour phase delivers to six effect pump feed evaporator heating chambers 11 as five effect secondary steams,
6) start five effect discharging pumps 31 after unevaporated strong brine to be delivered on the inlet duct of six effect forced circulation pumps 32, when six effect separators 20 possess certain high liquid level, start six effect forced circulation pumps 32, make strong brine in six effect forced circulation pump 32 high speed circulating and evaporating, and remaining moisture is evaporated, carry out strong brine to concentrate simultaneously, until there is a certain amount of crystal salt in six effect circulation fluids, six effect pump feed evaporator heating chambers 11 adopt isolates Secondary-steam heating from the isolated strong brine of five effect separators 19 from five effect separators 19, make the strong brine evaporation of part, vehicle repair major in circulation fluid is imitated at top six in separator 20 and is separated, the part secondary steam that five effect forcing vaporiser heating chambers 10 produce, temperature is 83 DEG C, then sextuple-effect evaporator heating chamber 11 service temperature is, shell side 83 DEG C, tube side 61 DEG C, water base for residue in former strong brine is evaporated, discharging salts contg is 42%m, wherein solid salt content is 10 ~ 25%m, vapour phase delivers to main condenser 13 condensing cooling as six effect secondary steams,
7) when six effect circulation fluids in containing have an appointment 10 ~ 25%m crystal salt time, start six effect discharging pumps 33 and slip is delivered to desalination press filtration unit 74, desalination press filtration unit 74 adopts press filtration mode, when pressure filter formed certain thickness and the filter cake of moisture content less time, salt discharge is sent outside, the saturated filtrate that press filtration produces then is back to intermediate buffer tank 18 and again evaporates salt, slurry condition to make the salt entering pressure filter, therefore the saturated brine that press filtration is complete, salts contg 23%m, all the time five effect pump feed evaporator heating chambers 10 are passed back into, vacuum tightness remains on-0.75 ~-0.8MPaG simultaneously.
Imitate phlegma topping-up pump 36 by one after the phlegma that described end preheater 1 phlegma and 1st effective evaporator heating chamber 2 produce converges and deliver to an effect preheater, as the heat source strong brine of an effect preheater 3, after heating, this part saturation steam phlegma is delivered to out-of-bounds associated pipe and reclaim; The phlegma that 2nd effect evaporator heating chamber 4 produces delivers to two effect preheaters 5 by two effect phlegma topping-up pumps 37, and as the heat source strong brine of two effect preheaters 5, condensate outlet 81 delivered to by the phlegma after heating; The phlegma that triple-effect evaporator heating chamber 6 produces delivers to triple effect preheater 7 by triple effect phlegma topping-up pump 38, and as the heat source strong brine of triple effect preheater 7, condensate outlet 81 delivered to by the phlegma after heating; The phlegma that quadruple effect evaporator heating chamber 8 produces delivers to quadruple effect preheater 9 by quadruple effect phlegma topping-up pump 39, and as the heat source strong brine of quadruple effect preheater 9, the phlegma after heating send condensate outlet 81; The phlegma that five effect pump feed evaporator heating chambers 10 produce delivers to condensate outlet 81 by five effect phlegma topping-up pumps 40; The phlegma that six effect pump feed evaporator heating chambers 11 produce delivers to condensate outlet 81 by six effect phlegma topping-up pumps 41; Phlegma withdrawing can is delivered to by main condenser phlegma topping-up pump 43 after the phlegma that secondary condenser 12 produces and the phlegma that main condenser 13 produces converge, the refrigerant of described main condenser 13 is recirculated cooling water, recirculated cooling water can adopt the whole audience to produce water coolant or from cooling tower systems, cooled by cooling water condensation, the whole condensation of the secondary steam in main condenser 13 is also reclaimed.
It is described when in water quality, COD and PH is too high, the part secondary steam that quadruple effect separator 17 can be produced branches to secondary condenser 12 by the five effect secondary steam variable valve 58 controlled into secondary condenser 12, thus reduces the secondary steam amount into five effect pump feed evaporator heating chambers 11; In order to strengthen the resistibility of falling-film evaporator to dirty salt, front quadruple effect evaporator heating chamber increases recycle pump, and the flow of recycle pump adjusts by variable valve; In order to strengthen the susceptibility of five, six effects to COD and PH in strong brine, increase the secondary steam pipeline that quadruple effect evaporator heating chamber increases to secondary condenser 12, and by quadruple effect to the governor valve control quadruple effect on secondary condenser secondary steam pipeline to the secondary steam amount of secondary condenser.
Described steam can as the thermal source of 1st effective evaporator heating chamber 2, also can as the thermal source of triple-effect evaporator heating chamber 4, end preheater 1 exports strong brine and can remove an effect separator 14, also can remove triple effect separator 16, two effect separators 15 produce secondary steams also directly can remove five effect pump feed evaporator heating chambers 10, thus realize one, two, five, six effect operational modes, three, four, five, six effect operational modes and one, two, three, four, five, six effect operational modes.
Embodiment
By this instrument and supplies, a kind of trade effluent containing inorganic salt (main composition is NaCl, Na2SO4, NaCO3 etc.) of process, this waste water is strong brine; During application apparatus of the present invention this waste water of process, first strong brine enters equalizing tank from upstream device, is pumped to apparatus of the present invention process afterwards by equalizing tank; The thermal source used is from the 0.5MPaG low-pressure saturated steam out-of-bounds come by the voltage stabilizing of drum buffering; Have two kinds of phlegmas after evaporation, be respectively saturation steam phlegma and secondary steam phlegma, temperature is about 80-90 DEG C and 30-40 DEG C, and out-of-bounds Desultwater Station delivered to by saturation steam phlegma, and out-of-bounds reuse water station delivered to by secondary steam phlegma; Device is provided with accident pool, and its effect is that synthetical recovery washes waste water, accident draining and other waste water, finally drains into outside battery limit (BL); Device is provided with reuse water Buffer Pool, and apparatus of the present invention machine seal cooling water and vacuum pump water are reclaimed in its effect, and is supplied water to pump and water cooling tower by reuse water recycle pump, and its loss is supplemented by out-of-bounds reuse water; Device is provided with and lands pond, and it is communicated with trench in device, mainly reclaims the saliferous strong brine missed because of failed operation and press filtration, and delivers to apparatus of the present invention continue to reclaim out salt by landing pond pump; Apparatus of the present invention recirculated cooling water is used by the water cooling tower air cooling Posterior circle of autogamy; Final real realization " zero " discharge;
In this example, designing treatment amount is 115t/h, and waste water TDS content is 69600mg/L, and adopt apparatus of the present invention to produce the requirement that the secondary steam phlegma obtained meets industrial reuse water, the mixed salt water content of product is not more than 5%, and steam-water ratio is not more than 0.23; Each effect running body main condition are in table 1;
this device is than more sensitive for the scale-forming ion in strong brine, and need leading portion water quality fully to process for scale-forming ion, device itself also can arrange special washing unit, and the cleaning of equipment can be carried out when not affecting operation simultaneously;
In sum, the present invention has efficient, energy-conservation, economic feature; Its water to steam ratio is no more than 0.23; Calculate to design 115t/h wastewater treatment, unit hour consumption quantity of steam is no more than 23t/h; Produce water and be about 107t/h, can be used as and produce water recycling, during operation optimization, even can produce de-salted water; And produce mixed salt 6-8t/h; Comprehensive benefit is remarkable, namely reaches the requirement that the whole audience " zero " discharges, and also produces the higher reuse water of quality or de-salted water, meets the fundamental state policy of country.
For multiple-effect evaporation technique, the service temperature of each effect is limited to the operating parameter of original vapor pressure grade and vacuum pump, this technique adopts the low-pressure steam of 0.5MPaG, and vacuum pump operation pressure is-0.8MPaG, is determined the operating parameter of each effect under this operating mode by design;
The strong brine temperature entering an effect, by variable valve, is carried out chain control by drop temperature and the raw steam flow entering this preheater, then is regulated by the carrying out of variable valve, is 122 DEG C to meet the temperature entering an effect;
The internal circulating load of one to quadruple effect is by each under meter and variable valve F04, and F06, F11, F13 are chain to be controlled, and the internal circulating load made designs the twice of minimum cloth liquid measure for it;
The liquid level of separator is by the liquidometer on it and variable valve F05, and F07, F12, F14 carry out contact control, ensures its liquid level only 0.2m bottom distance separate chamber;
The vacuum tightness of end is then controlled by variable valve, and control vacuum tightness is-0.8MPaG;
Five, six effect separate chamber liquid levels then control by variable valve is chain, control liquid level and exceed 1 ~ 2 meter, circulation fluid outlet position.

Claims (10)

1. one kind is applied to the sextuple-effect evaporation crystallization apparatus of zero discharge of industrial waste water, comprise strong brine import (76), circulating backwater outlet (77), make-up cooling water import (78), abraum salt outlet (79), reuse water outlet (80), raw steam inlet (81), raw steam condensate outlet (82), it is characterized in that, strong brine import (76) is communicated with secondary condenser (12) by secondary condenser strong brine variable valve (61); Secondary condenser (12), quadruple effect preheater (9), triple effect preheater (7), two effects preheater (5), effect preheater (3) are communicated with successively; One effect preheater (3) discharge port connects end preheater (1) opening for feed, and end preheater (1) discharge port is by switch-valve N(73), switch-valve O(74) be communicated with effect separator (14) opening for feed, triple effect separator (16) opening for feed; One effect separator (14), two effects separator (15), triple effect separator (16), quadruple effect separator (17), intermediate buffer tank (18), five effects separator (19), six effects separator (20), desalination press filtration unit (75) are communicated with successively; Desalination press filtration unit (75) one discharge port is communicated with intermediate buffer tank (18) opening for feed, and another discharge port is communicated with abraum salt outlet (79); Five effect separator (19), six effect separator (20) by variable valve D(63), variable valve E(64) be communicated with desalination press filtration unit (75);
Described steam inlet (81) is by the raw steam regulating valve (44) of an effect, the raw steam regulating valve (45) of end preheater, switch-valve P(46) be communicated with 1st effective evaporator heating chamber (2) inlet mouth, 1st effective evaporator heating chamber (2) liquid-vapor mixture outlet and is imitated separator (14) and is communicated with, one effect separator (14), 2nd effect evaporator heating chamber (4), two effects separator (15), triple-effect evaporator heating chamber (6), triple effect separator (16), quadruple effect evaporator heating chamber (6), quadruple effect separator (17) is communicated with successively, the outlet of quadruple effect separator (17) secondary steam is by five effects secondary steam variable valve (58), secondary condenser secondary steam variable valve (60) and five imitates pump feed evaporator heating chamber (10) secondary steam import and secondary condenser (12) secondary steam inlet communication, quadruple effect separator (17) is by switch-valve A(51) imitate separator (15) be communicated with two, five effects pump feed evaporator heating chamber (10), five effects separator (19), six effects pump feed evaporator heating chamber (11), six effects separator (20), main condenser (13) are communicated with successively, the outlet of main condenser (13) communication loop backwater (77), make-up cooling water import (78), two effects preheater (5) are by switch-valve C(53) be communicated with triple-effect evaporator heating chamber (6), triple-effect evaporator heating chamber (6) is by switch-valve B(52) be communicated with end preheater (1),
Described end preheater (1) condensation-water drain is communicated with 1st effective evaporator heating chamber (2), and 1st effective evaporator heating chamber (2) condensate outlet and is imitated preheater (3) thermal source inlet and is communicated with; 2nd effect evaporator heating chamber (4) phlegma and two is imitated preheater (5) thermal source inlet and is communicated with; Triple-effect evaporator heating chamber (6) phlegma is communicated with triple effect preheater (7) thermal source inlet; Quadruple effect evaporator heating chamber (8) phlegma is communicated with quadruple effect preheater (9) thermal source inlet; One effect preheater (3) condensate outlet pipeline connects condensate outlet (82); Two effect preheater (5) phlegmas, triple effect preheater (7) phlegma, quadruple effect preheater (9) phlegma, five effect pump feed evaporator heating chamber (10) phlegmas, six effect pump feed evaporator heating chamber (10) phlegmas, secondary condenser (12) phlegma and main condenser (13) phlegma converge rear reuse water outlet (80) and are communicated with; Wherein imitate phlegma topping-up pump (41), secondary condenser phlegma topping-up pump (42), main condenser phlegma topping-up pump (43) to the supercharging of pipeline phlegma by effect phlegma topping-up pump (36), two effects phlegma topping-up pump (37), triple effect phlegma topping-up pump (38), quadruple effect phlegma topping-up pump (39), five effects phlegma topping-up pump (40), six;
Described effect separator (14), two effects separator (15), triple effect separator (16), quadruple effect separator (17), intermediate buffer tank (18), five effects separator (19), six effects separator (20) are by effect discharging pump (22), two effects discharging pump (24), triple effect discharging pump (26), quadruple effect discharging pump (28), intermediate buffer tank discharging pump (29), five effects discharging pump (31), six effects discharging pump (32) control discharging, by effect discharging variable valve (48), two effects discharging variable valve (50), triple effect discharging variable valve (55), quadruple effect discharging variable valve (57), intermediate buffer tank discharging variable valve (59) controls discharging speed, by effect recycle pump (21), two effects recycle pump (22), triple effect cycle pump (25), quadruple effect recycle pump (27), five effects forced circulation pump (30), six effects forced circulation pump (32) are to effect falling-film evaporator heating chamber (2), two effects falling-film evaporator heating chamber (4), triple effect falling-film evaporator heating chamber (6), for quadruple effect falling-film evaporator heating chamber (8), five effects pump feed evaporator heating chamber (10), six effect pump feed evaporator heating chamber (11) circulation material conveyings, by switch-valve F(65), switch-valve J(66), switch-valve H(67), switch-valve I(68), switch-valve J(69), switch-valve K(70), switch-valve L(71), switch-valve M(72) control effect separator (14) respectively, two effects separator (15), triple effect separator (16), the switch of quadruple effect separator (17) pipeline, by effect circulating regulation valve (47), two effects circulating regulation valve (49), triple effect cycle variable valve (54), quadruple effect circulating regulation valve (56) adjust flux.
2. a kind of sextuple-effect evaporation crystallization apparatus being applied to zero discharge of industrial waste water according to claim 1, it is characterized in that, described 1st effective evaporator heating chamber (2) and effect separator (14) composition 1st effective evaporator, 2nd effect evaporator heating chamber (4) and two effect separator (15) composition 2nd effect evaporators, triple-effect evaporator heating chamber (6) and triple effect separator (16) composition triple-effect evaporator, quadruple effect evaporator heating chamber (8) and quadruple effect separator (17) composition quadruple effect evaporator, 1st effective evaporator, 2nd effect evaporator, triple-effect evaporator, quadruple effect evaporator is falling-film evaporator, five effects pump feed evaporator heating chamber (10), five effects separator (19) and five effect forced circulation pump (30) composition quintuple effect evaporators, six effects pump feed evaporator heating chamber (11), six effects separator (20) and six effect forced circulation pump (32) composition sextuple-effect evaporators, quintuple effect evaporator, sextuple-effect evaporator adopts pump feed evaporator.
3. a kind of sextuple-effect evaporation crystallization apparatus being applied to zero discharge of industrial waste water according to claim 1, it is characterized in that, described charging divides halfload charging and full load charging, by switch valve switch-valve E(65), switch-valve F(66), switch-valve J(67), switch-valve H(68), switch-valve I(69), switch-valve J(70), switch-valve K(71), switch-valve L(72) realize half/full load of each several part.
4. a kind of sextuple-effect evaporation crystallization apparatus being applied to zero discharge of industrial waste water according to claim 1, it is characterized in that, the vacuum tightness of described whole system is maintained by water ring vacuum pump (34), and vacuum tightness is-75 ~-80KPa, increases broken vacant duct and broken empty variable valve (62) simultaneously.
5. a kind of sextuple-effect evaporation crystallization apparatus being applied to zero discharge of industrial waste water according to claim 1, it is characterized in that, described works as closing switch valve A(51), switch-valve B(52), switch-valve O(74), when other switch-valves are opened, system adopts one, two, three, four, five, six effect operational modes, for sextuple-effect evaporation, can by maximum 110% load operation, as closing switch valve B(52), switch-valve C(53), switch-valve O (74), when other switch-valves are opened, system adopts one, two, five, six effect operational modes, for four-effect evaporation, can by maximum 60% load operation, as closing switch valve P (46), switch-valve A (51), switch-valve C (53), switch-valve N (73), when other switch-valves are opened, system adopts three, four, five, six effect operational modes, for four-effect evaporation, can by maximum 60% load operation.
6. a kind of sextuple-effect evaporation crystallization apparatus being applied to zero discharge of industrial waste water according to claim 1, it is characterized in that, described effect recycle pump (21), effect discharging pump (22), two effects recycle pump (23), two effects discharging pump (24), triple effect cycle pump (25), triple effect discharging pump (26) overcurrent part material adopt dual phase steel 2205, and can not carry solid-liquid mixed stream; Quadruple effect recycle pump (27), quadruple effect discharging pump (28) overcurrent part material adopt dual phase steel 2205, and allow the mixing of conveying solid-liquid, and solid content is not more than 5%m fluid; Five effects forced circulation pump (30) and six effects forced circulation pump (32) are propeller pump, and overcurrent part material adopts dual phase steel 2605; End preheater (1), effect preheater (3), two effects preheater (5), triple effect preheater (7), quadruple effect preheater (9) are shell and tube heat exchanger, and its heat transfer tube material is TA2, and other materials are Stainless steel 316 L; 1st effective evaporator heating chamber (2), 2nd effect evaporator heating chamber (4), triple-effect evaporator heating chamber (6), quadruple effect evaporator heating chamber (8) adopt tube-type down-flow evaporator, and heat transfer tube material is TA10 and TA2, and other materials are Stainless steel 316 L.
7. be applied to a sextuple-effect evaporation crystallization processes for zero discharge of industrial waste water, it is characterized in that, this technique comprises the following steps:
1) strong brine that strong brine import (76) flows into is successively by secondary condenser (12), quadruple effect preheater (9), triple effect preheater (7), two effects preheater (5), one effect preheater (3) preheating, temperature 25 ~ 30 degree, pressure is 0.7MPaG, salts contg is 6%m, quadruple effect preheater (9), triple effect preheater (7), two effects preheater (5), one effect preheater (3) heat recuperation, regulated by effect steam regulating valve (44) and end preheater steam regulating valve (45), 1st effective evaporator heating chamber (2) is entered after strong brine being heated to 122 DEG C, the steam water interface that 1st effective evaporator heating chamber (2) produces is separated in effect separator (14), when there being certain liquid level in effect separator (14), startup one effect recycle pump (21) is carried out strong brine self-separation device and is circulated to 1st effective evaporator heating chamber (2), adopt the steam of 0.5MPaG, temperature is 159 DEG C, service temperature is, shell side 130 DEG C, tube side 125 DEG C, part water in strong brine is evaporated away, discharge concentration is 7.3%m, vapour phase delivers to 2nd effect evaporator heating chamber (4) as an effect secondary steam,
2) by effect discharging governor valve control (48) liquid level after, by effect discharging pump (22), unevaporated strong brine is delivered to two effect separators (15), when there being certain liquid level in two effects separator (15), startup two effect recycle pump (23) is carried out strong brine self-separation device and is circulated to 2nd effect evaporator heating chamber (4), 2nd effect evaporator heating chamber (4) adopts from effect separator (14) isolated Secondary-steam heating from effect separator (14) isolated strong brine, make the strong brine evaporation of part, the secondary steam that 1st effective evaporator heating chamber (2) produces, temperature is 124 DEG C, then 2nd effect evaporator heating chamber (4) service temperature is, shell side 124 DEG C, tube side 119 DEG C, the steam water interface that 2nd effect evaporator heating chamber (4) produces is separated in two effects separator (15), part water in strong brine is evaporated away, discharge concentration is 9.5%m, vapour phase delivers to triple-effect evaporator heating chamber (6) as two effect secondary steams,
3) liquid level is controlled by two effects discharging variable valve (50) after, by two effects discharging pump (24), unevaporated strong brine is delivered to triple effect separator (16), when there being certain liquid level in triple effect separator (16), startup triple effect cycle pump (25) is carried out strong brine self-separation device and is circulated to triple-effect evaporator heating chamber (6), triple-effect evaporator heating chamber (6) adopts from two effect separator (15) isolated Secondary-steam heatings from two effect separator (15) isolated strong brines, make the strong brine evaporation of part, the secondary steam that 2nd effect evaporator heating chamber (4) produces, temperature is 118 DEG C, then triple-effect evaporator heating chamber (6) service temperature is, shell side 118 DEG C, tube side 113 DEG C, the steam water interface that triple-effect evaporator heating chamber (6) produces is separated in triple effect separator (15), part water in strong brine is evaporated away, discharge concentration is 13.3%m, vapour phase delivers to quadruple effect evaporator heating chamber (8) as triple effect secondary steam,
4) liquid level is controlled by triple effect discharging variable valve (55) after, by triple effect discharging pump (28), unevaporated strong brine is delivered to quadruple effect separator (17), when there being certain liquid level in quadruple effect separator (17), startup quadruple effect recycle pump (27) is carried out strong brine self-separation device and is circulated to quadruple effect evaporator heating chamber (8), quadruple effect evaporator heating chamber (8) adopts from triple effect separator (16) isolated Secondary-steam heating from triple effect separator (16) isolated strong brine, make the strong brine evaporation of part, the secondary steam that triple-effect evaporator heating chamber (6) produces, temperature is 112 DEG C, then quadruple effect evaporator heating chamber (8) service temperature is, shell side 112 DEG C, tube side 107 DEG C, the steam water interface that quadruple effect evaporator heating chamber (8) produces is separated in quadruple effect separator (17), part water in strong brine is evaporated away, discharge concentration is 22.3%m, vapour phase delivers to five effect pump feed evaporator heating chambers (10) as quadruple effect secondary steam,
5) liquid level is controlled by quadruple effect discharging variable valve (57) after, by quadruple effect discharging pump (28), unevaporated strong brine is delivered to intermediate buffer tank (18), when intermediate buffer tank (18) has certain liquid level, starting intermediate buffer tank discharging pump (29) delivers on the inlet duct of five effect forced circulation pumps (30) by strong brine, the liquid level of intermediate buffer tank (18) is controlled by intermediate buffer tank variable valve (59), when five effects separator (19) possess certain high liquid level, start five effects forced circulation pump (30), make strong brine in five effect forced circulation pump (30) high speed circulations, the secondary steam that quadruple effect evaporator heating chamber (8) produces in unit capacity lower than 70m 3during/h, do not shunt, all enter five effect pump feed evaporator heating chambers (10), when treatment capacity is greater than 70m 3during/h, five effects pump feed evaporator heating chamber (10) adopt the strong brine come from intermediate buffer tank (18) from quadruple effect separator (17) isolated Secondary-steam heating, make the strong brine evaporation of part, vehicle repair major in circulation fluid is imitated at top five in separator (19) and is separated, the secondary steam that quadruple effect evaporator heating chamber (8) produces, temperature is 106 DEG C, then quintuple effect evaporator heating chamber (10) service temperature is, shell side 106 DEG C, tube side 84 DEG C, part water in strong brine is evaporated away, discharging salts contg is 29%m, wherein solid salt content is 5 ~ 10%m, vapour phase delivers to six effect pump feed evaporator heating chambers (11) as five effect secondary steams,
6) starting five effects discharging pump (31) after delivers on the inlet duct of six effect forced circulation pumps (32) by unevaporated strong brine, when six effects separator (20) possess certain high liquid level, start six effects forced circulation pump (32), make strong brine in six effect forced circulation pump (32) high speed circulating and evaporating, and remaining moisture is evaporated, carry out strong brine to concentrate simultaneously, until there is a certain amount of crystal salt in six effect circulation fluids, six effects pump feed evaporator heating chamber (11) adopt isolates Secondary-steam heating from five effect separator (19) isolated strong brines from five effects separator (19), make the strong brine evaporation of part, vehicle repair major in circulation fluid is imitated at top six in separator (20) and is separated, the part secondary steam that five effects forcing vaporiser heating chamber (10) produce, temperature is 83 DEG C, then sextuple-effect evaporator heating chamber (11) service temperature is, shell side 83 DEG C, tube side 61 DEG C, water base for residue in former strong brine is evaporated, discharging salts contg is 42%m, wherein solid salt content is 10 ~ 25%m, vapour phase delivers to main condenser (13) condensing cooling as six effect secondary steams,
7) when six effect circulation fluids in containing have an appointment 10 ~ 25%m crystal salt time, start six effects discharging pump (33) and slip is delivered to desalination press filtration unit (74), desalination press filtration unit (74) adopts press filtration mode, when pressure filter formed certain thickness and the filter cake of moisture content less time, salt discharge is sent outside, the saturated filtrate that press filtration produces then is back to intermediate buffer tank (18) and again evaporates salt, slurry condition to make the salt entering pressure filter, therefore the saturated brine that press filtration is complete, salts contg 23%m, all the time five effect pump feed evaporator heating chambers (10) are passed back into, vacuum tightness remains on-0.75 ~-0.8MPaG simultaneously.
8. a kind of sextuple-effect evaporation crystallization apparatus being applied to zero discharge of industrial waste water according to claim 7, it is characterized in that, imitate phlegma topping-up pump (36) by one after the phlegma that described end preheater (1) phlegma and 1st effective evaporator heating chamber (2) produce converges and deliver to an effect preheater, as the heat source strong brine of effect preheater (3), after heating, this part saturation steam phlegma is delivered to out-of-bounds associated pipe and reclaim; The phlegma that 2nd effect evaporator heating chamber (4) produces delivers to two effect preheaters (5) by two effects phlegma topping-up pump (37), and as the heat source strong brine of two effects preheater (5), condensate outlet (81) delivered to by the phlegma after heating; The phlegma that triple-effect evaporator heating chamber (6) produces delivers to triple effect preheater (7) by triple effect phlegma topping-up pump (38), and as the heat source strong brine of triple effect preheater (7), condensate outlet (81) delivered to by the phlegma after heating; The phlegma that quadruple effect evaporator heating chamber (8) produces delivers to quadruple effect preheater (9) by quadruple effect phlegma topping-up pump (39), and as the heat source strong brine of quadruple effect preheater (9), the phlegma after heating send condensate outlet (81); The phlegma that five effects pump feed evaporator heating chamber (10) produce delivers to condensate outlet (81) by five effects phlegma topping-up pump (40); The phlegma that six effects pump feed evaporator heating chamber (11) produce delivers to condensate outlet (81) by six effects phlegma topping-up pump (41); Phlegma withdrawing can is delivered to by main condenser phlegma topping-up pump (43) after the phlegma that secondary condenser (12) produces and the phlegma that main condenser (13) produces converge, the refrigerant of described main condenser (13) is recirculated cooling water, recirculated cooling water can adopt the whole audience to produce water coolant or from cooling tower systems, cooled by cooling water condensation, the whole condensation of secondary steam in main condenser (13) is also reclaimed.
9. a kind of sextuple-effect evaporation crystallization apparatus being applied to zero discharge of industrial waste water according to claim 7, it is characterized in that, it is described when in water quality, COD and PH is too high, the part secondary steam that quadruple effect separator (17) can be produced branches to secondary condenser (12) by five effects secondary steam variable valve (58) controlled into secondary condenser (12), thus reduces the secondary steam amount into five effect pump feed evaporator heating chambers (11); In order to strengthen the resistibility of falling-film evaporator to dirty salt, front quadruple effect evaporator heating chamber increases recycle pump, and the flow of recycle pump adjusts by variable valve; In order to strengthen the susceptibility of five, six effects to COD and PH in strong brine, increase the secondary steam pipeline that quadruple effect evaporator heating chamber increases to secondary condenser (12), and by quadruple effect to the governor valve control quadruple effect on secondary condenser secondary steam pipeline to the secondary steam amount of secondary condenser.
10. a kind of sextuple-effect evaporation crystallization apparatus being applied to zero discharge of industrial waste water according to claim 7, it is characterized in that, described steam can as the thermal source of 1st effective evaporator heating chamber (2), also can as the thermal source of triple-effect evaporator heating chamber (4), end preheater (1) outlet strong brine can remove an effect separator (14), also triple effect separator (16) can be removed, the secondary steam that two effects separator (15) produce also directly can remove five effect pump feed evaporator heating chambers (10), thus realize one, two, five, six effect operational modes, three, four, five, six effect operational modes and, two, three, four, five, six effect operational modes.
CN201510741592.7A 2015-11-05 2015-11-05 A kind of sextuple-effect evaporation crystallization apparatus and technique thereof being applied to zero discharge of industrial waste water Pending CN105217703A (en)

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CN105771294A (en) * 2016-04-29 2016-07-20 云南文山铝业有限公司 Falling-film evaporator set
CN105879426A (en) * 2016-05-31 2016-08-24 浙江泰康蒸发器有限公司 MVR continuous evaporative crystallization system
CN106082372A (en) * 2016-08-12 2016-11-09 南通科兴石墨设备有限公司 A kind of waste water triple effect concentrating and treating system
CN107963681A (en) * 2017-10-18 2018-04-27 楚天华通医药设备有限公司 A kind of multistage steam recompresses formula distillation machine
CN109453532A (en) * 2018-12-20 2019-03-12 四川久大蓬莱盐化有限公司 One kind five imitates hexasomic vacuum salt production mother liquor concentrations device and its method for concentration
CN111721156A (en) * 2020-07-29 2020-09-29 阿拉尔市中泰纺织科技有限公司 Pulp waste steam heat energy recycling and comprehensive utilization treatment method and device
CN112316450A (en) * 2020-09-22 2021-02-05 蓝旺节能科技（浙江）有限公司 High-efficient circulation vaporization system of traditional chinese medicine processing
CN112755558A (en) * 2020-12-22 2021-05-07 中国天辰工程有限公司 Brine evaporation and concentration system, brine evaporation and concentration process and application thereof
CN112807721A (en) * 2020-12-21 2021-05-18 中国天辰工程有限公司 Process method for extracting concentrated and light brine by adopting five-effect concurrent evaporation process
CN113476874A (en) * 2021-07-29 2021-10-08 上海神农节能环保科技股份有限公司 Multiple-effect evaporation crystallizer suitable for viscose fiber acid bath concentration crystallization
CN113772765A (en) * 2021-05-27 2021-12-10 湖北中原楚天化工技术有限公司 Multi-effect evaporator for treating lithium nitrate wastewater

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CN105771294A (en) * 2016-04-29 2016-07-20 云南文山铝业有限公司 Falling-film evaporator set
CN105879426A (en) * 2016-05-31 2016-08-24 浙江泰康蒸发器有限公司 MVR continuous evaporative crystallization system
CN106082372A (en) * 2016-08-12 2016-11-09 南通科兴石墨设备有限公司 A kind of waste water triple effect concentrating and treating system
CN107963681A (en) * 2017-10-18 2018-04-27 楚天华通医药设备有限公司 A kind of multistage steam recompresses formula distillation machine
CN109453532B (en) * 2018-12-20 2023-09-01 四川久大蓬莱盐化有限公司 Five-effect six-body vacuum salt-making mother liquor concentrating device and concentrating method thereof
CN109453532A (en) * 2018-12-20 2019-03-12 四川久大蓬莱盐化有限公司 One kind five imitates hexasomic vacuum salt production mother liquor concentrations device and its method for concentration
CN111721156A (en) * 2020-07-29 2020-09-29 阿拉尔市中泰纺织科技有限公司 Pulp waste steam heat energy recycling and comprehensive utilization treatment method and device
CN112316450A (en) * 2020-09-22 2021-02-05 蓝旺节能科技（浙江）有限公司 High-efficient circulation vaporization system of traditional chinese medicine processing
CN112316450B (en) * 2020-09-22 2022-07-15 蓝旺节能科技（浙江）有限公司 High-efficient circulation vaporization system of traditional chinese medicine processing
CN112807721A (en) * 2020-12-21 2021-05-18 中国天辰工程有限公司 Process method for extracting concentrated and light brine by adopting five-effect concurrent evaporation process
CN112755558A (en) * 2020-12-22 2021-05-07 中国天辰工程有限公司 Brine evaporation and concentration system, brine evaporation and concentration process and application thereof
CN112755558B (en) * 2020-12-22 2024-05-24 中国天辰工程有限公司 Brine evaporation concentration system, brine evaporation concentration process and application thereof
CN113772765A (en) * 2021-05-27 2021-12-10 湖北中原楚天化工技术有限公司 Multi-effect evaporator for treating lithium nitrate wastewater
CN113476874A (en) * 2021-07-29 2021-10-08 上海神农节能环保科技股份有限公司 Multiple-effect evaporation crystallizer suitable for viscose fiber acid bath concentration crystallization

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