CN106669210A - Salt-containing organic solution evaporation recovery system - Google Patents

Salt-containing organic solution evaporation recovery system Download PDF

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Publication number
CN106669210A
CN106669210A CN201611137471.2A CN201611137471A CN106669210A CN 106669210 A CN106669210 A CN 106669210A CN 201611137471 A CN201611137471 A CN 201611137471A CN 106669210 A CN106669210 A CN 106669210A
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China
Prior art keywords
effect
outlet
quadruple
triple
crystallizer
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CN201611137471.2A
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CN106669210B (en
Inventor
杨杰
尹璐
许亮
王晓克
孙利敏
孙孝天
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Jiangsu Mai Ande Energy Saving Evaporation Equipment Co Ltd
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Jiangsu Mai Ande Energy Saving Evaporation Equipment Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/26—Multiple-effect evaporating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention relates to a salt-containing organic solution evaporation recovery system, which comprises a stock solution storage tank and a first-effect falling-film evaporator, wherein an outlet of the stock solution storage tank is connected with a first-effect feed liquid inlet in the lower part of the first-effect falling-film evaporator through a feed pump, a first-effect steam inlet in the upper part of a shell pass of the first-effect falling-film evaporator is connected with a live steam pipe, and a first-effect condensed water outlet in the lower part of the shell pass of the first-effect falling-film evaporator is connected with an inlet of a condensed water tank through a first-effect condensed water pipe; a material separation opening in the lower part of the first-effect falling-film evaporator is connected with a first-effect separator through a communicating pipe, a first-effect separator steam exhaust port in the top of the first-effect separator is connected with a first-effect separator steam exhaust pipe, a first-effect separator feed liquid outlet in the bottom of the first-effect separator is connected with a first-effect feed liquid down pipe, the first-effect feed liquid down pipe is connected with a first-effect evaporator circulating solution inlet in the top of the first-effect falling-film evaporator through a first-effect circulating pump and a first-effect circulating pipe, and a first-effect feed liquid discharge pipe is also connected to an outlet of the first-effect circulating pump. According to the system, both an organic solvent and salt can be recovered, and the energy consumption is low.

Description

Saliferous organic solution evaporates recovery system
Technical field
The present invention relates to a kind of saliferous organic solution evaporates recovery system, the high saliferous organic solution of environmental protection industry (epi) is can be applicable to Process and the industrial organic solvent of food pharmaceutical recovery, belong to Treatment of Industrial Water technical field.
Background technology
In environmental protection and pharmaceuticals industry, because of the multiformity of chemical industry, solution component is increasingly sophisticated, and mostly high saliferous height has Rectification process being adopted machine thing, the generally mode of recovery organic solvent, Jing after rectification is separated, organic solvent overflows, and inorganic salt is still more Stay in tower reactor, need residual liquid periodically to be arranged to tower reactor.A part of organic solvent can be carried in residual liquid secretly, caused damage, be reduced The response rate of organic solvent；Inorganic salt is not recycled utilization simultaneously, increased the burden of subsequent treatment.Additionally, tower reactor Rectification need to give birth to quantity of steam greatly, high energy consumption.
The content of the invention
It is an object of the present invention to overcome problems of the prior art, there is provided a kind of saliferous organic solution is evaporated back Receipts system, is capable of achieving the common recovery of organic solution and inorganic salt, and energy consumption is low.
To solve above technical problem, a kind of saliferous organic solution evaporation recovery system of the present invention, including stock solution storage tank With an effect falling film evaporator, the outlet of stock solution storage tank is connected with the entrance of feed pump, under the effect falling film evaporator Portion is connected with an effect feed liquid down pipe, is provided with 1st effective evaporator feed liquid port in the middle part of the effect feed liquid down pipe, it is described enter The outlet of material pump is connected with an effect feed liquid down pipe of an effect falling film evaporator bottom, the effect falling film evaporator shell side top 1st effective evaporator air intake be connected with raw steam pipe, described one imitates the 1st effective evaporator condensed water of falling film evaporator shell side bottom Outlet is connected with the entrance of condensate water pot by an effect condensate pipe；The feed separation mouth of the one effect falling film evaporator bottom leads to Cross and be connected with an effect separator communicating pipe, the effect separator steam drain and an effect separator steam discharge at the top of the effect separator Pipe is connected, and an effect separator material liquid outlet of the effect separator bottom is connected with described one effect feed liquid down pipe, and described one Effect feed liquid down pipe lower end with one effect circulating pump entrance be connected, it is described one effect circulating pump outlet by one effect circulation pipe and 1st effective evaporator circulation fluid entrance at the top of one effect falling film evaporator is connected, and the outlet of the effect circulating pump is also associated with an effect Feed liquid outlet tube.
Relative to prior art, the present invention achieves following beneficial effect：Saliferous organic solution stock solution after preheated is entered Enter the 1st effective evaporator feed liquid port of an effect falling film evaporator, the effect concentrated solution and an effect point with an effect falling film evaporator bottom An effect concentrated solution from device bottom is flowed downward along an effect feed liquid down pipe jointly, and is circulated pumped by an effect, and Jing mono- is imitated Circulation pipe is sent to the 1st effective evaporator circulation fluid entrance at the top of an effect falling film evaporator；135 DEG C of raw steam that raw steam pipe is provided The effect circulation concentrated solution flowed down along falling liquid film tube wall is entered from 1st effective evaporator air intake into the shell side of an effect falling film evaporator Row heating, 100 DEG C of an effect steam condensate (SC) enter condensate water pot from 1st effective evaporator condensation-water drain and an effect condensate pipe Reclaim；An effect concentrated solution after heating is imitated into one from communicating pipe and is separated in separator, and 72 DEG C of an effect steam is from an effect Into an effect separator gland steam exhauster, the main component of an effect steam is organic vapor to separator steam drain；After concentration one Effect concentrated solution imitates concentrated solution from an effect feed liquid output bank of tubes into an effect circulation pump circulation, the part one of an effect circulating-pump outlet Go out.Through the evaporation and concentration of an effect falling film evaporator, organic solvent evaporates in a large number, and the concentration of inorganic salt solution is improved, Condition is provided for follow-up further concentrating and separating.
As the improvement of the present invention, present invention additionally comprises two effect falling film evaporators, the bottom of the two effects falling film evaporator Two effect feed liquid down pipes are connected with, 2nd effect evaporator feed liquid port, two effect in the middle part of the two effects feed liquid down pipe, is provided with Vaporizer feed liquid port with described one effect feed liquid outlet tube outlet be connected, it is described one imitate separator gland steam exhauster outlet with it is described The 2nd effect evaporator air intake on two effect falling film evaporator shell side tops is connected, two effects of the two effect falling film evaporator shell sides bottom Evaporator condensation liquid is exported and is connected with two effect condensate lines；The feed separation mouth of the two effect falling film evaporators bottom is by connection Pipe is connected with two effect separators, and the two effect separator steam drains and two at the top of the two effects separator imitate separator gland steam exhauster phases Even, two effect separator material liquid outlets of the two effects separator bottom are connected with described two effect feed liquid down pipes, the two effects material The lower end of liquid down pipe is connected with the entrance of two effect circulating pumps, and the outlet of the two effects circulating pump is by two effect circulation pipes and two effects 2nd effect evaporator circulation fluid entrance at the top of falling film evaporator is connected, and the outlet of the two effects circulating pump is also associated with two effect feed liquids Outlet tube.Inorganic salt content is 2~3%wt, and temperature is after 73 DEG C of an effect concentrated solution is discharged from an effect feed liquid outlet tube, with two Two effect concentrated solutions of two effect concentrated solutions of effect falling film evaporator bottom and two effect separator bottoms are jointly along two effect feed liquid down pipes Flowing downward, and pumped being circulated by two effects, the effect circulation pipes of Jing bis- are sent to the 2nd effect evaporator at the top of two effect falling film evaporators Circulation fluid entrance；Organic vapor is mainly in the 72 DEG C of one effect steam that one effect separator is produced, also containing part water vapour, It is after one effect steam is discharged from an effect separator gland steam exhauster, from 2nd effect evaporator air intake into two effect falling film evaporator shell sides, right Heated along the two effect circulation concentrated solutions that falling liquid film tube wall is flowed down, 72 DEG C of two effect condensed fluid from 2nd effect evaporator condensate outlet and Two effect condensate lines are discharged；Two effect concentrated solutions after heating are imitated into two from communicating pipe and are separated in separators, organic solvent Continuing evaporation with moisture becomes two effect steam, and 66 DEG C of two effect steam is from two effect separator steam drains into two effect separator steam discharges Pipe；Into two effect circulation pump circulations, part inorganic salt content is 4~6%wt to two effect concentrated solutions after concentration, and temperature is 68 DEG C Two effect concentrated solutions are discharged from two effect feed liquid outlet tubes.Two effect falling film evaporators imitate steam to one using an effect separator is produced one Effect concentrated solution is further concentrated, and has both been reclaimed the waste heat that an effect is produced, has further been evaporated organic solvent and improved The concentration of inorganic salt solution.
As a further improvement on the present invention, present invention additionally comprises one-level preheater, the outlet at bottom of the condensate water pot It is connected with the entrance of condensate pump, the outlet of the condensate pump passes through the one-level of condensed water feed pipe and the one-level preheater Preheater water inlet is connected, and the one-level preheater outlet of the one-level preheater is connected with condensing hot air furnace pipe, the one-level The one-level preheater feed liquid port of preheater is connected with the outlet of the feed pump, the one-level preheater material of the one-level preheater Liquid outlet is connected with the 1st effective evaporator feed liquid port.Saliferous organic solution stock solution Jing stock solution pipe enters stock solution storage tank, inorganic Salt content is 1~1.5%wt, and temperature is 25 DEG C；98 DEG C one effect steam condensate (SC) be condensed from condensate water pot water pump extraction, Tube side into one-level preheater is preheated to the saliferous organic solution stock solution of shell side, the temperature of stock solution is improved to 45 DEG C, An effect steam condensate (SC) temperature after heat release is 40 DEG C, enters condensation water recovery system by condensing hot air furnace pipe, both reclaimed The heat of condensed water, reduces the load of an effect falling film evaporator again, reduces raw steam consumption.
As a further improvement on the present invention, present invention additionally comprises two grades of preheaters, the one-level preheater material liquid outlet Be connected with two grades of preheater feed liquid ports of two grades of preheaters, two grades of preheater material liquid outlets of two grades of preheaters with The 1st effective evaporator feed liquid port is connected；Two grades of preheater air intakes of two grades of preheaters and the raw steam pipe phase Even, two grades of preheater condensed waters row's mouths of two grades of preheaters entering by high-temperature condensation water return duct and the condensate water pot The mouth of a river is connected.135 DEG C of raw steam are further heated into the tube side of two grades of preheaters to the stock solution preheated through one-level, are made The temperature of stock solution continues to improve to 60 DEG C, and 100 after heat release DEG C high-temperature condensation water enters condensation by high-temperature condensation water return duct Water pot, then one-level preheater is sent to by condensate pump carries out further heat release, stock solution temperature after two-stage preheating is significantly carried Height, greatly reduces the load of an effect falling film evaporator, further reduces raw steam consumption.
As a further improvement on the present invention, present invention additionally comprises triple effect crystallizer, sets at the top of the triple effect crystallizer There is triple effect crystallizer steam drain, in the middle part of the circumferential wall of the triple effect crystallizer, be provided with triple effect crystallizer charging aperture, triple effect crystallizer Circulation port and triple effect crystallizer refluxing opening, the bottom of the triple effect crystallizer are provided with triple effect crystallizer discharging opening, the triple effect knot Brilliant device charging aperture is connected with the outlet of described two effect feed liquid outlet tubes；Triple effect is connected with below the triple effect crystallizer discharging opening Auxiliary heater, the discharging opening of the triple effect auxiliary heater lower end is by triple effect downlink cycle pipe and the entrance of triple effect cycle pump It is connected, the outlet of the triple effect cycle pump is connected with the charging aperture of triple effect heater lower end by triple effect uplink cycle pipe, described The discharging opening of triple effect heater upper end is connected with the triple effect crystallizer circulation port, and the outlet of the triple effect cycle pump is also associated with Triple effect magma outlet tube；The triple effect crystallizer steam drain is connected with triple effect crystallizer gland steam exhauster；The two effects separator steam discharge The outlet of pipe is connected with the triple effect heater air intake on the triple effect heater shell side top, the outlet of the two effects condensate line It is connected with the triple effect condensate inlet of the triple effect heater shell side bottom, the triple effect condensation of the triple effect heater shell side bottom Liquid outlet is connected with triple effect condensate line；It is described two effect separator gland steam exhauster outlet also with the triple effect auxiliary heater shell side The triple effect auxiliary heater air intake on top is connected, the outlet of the two effects condensate line also with the triple effect auxiliary heater shell The triple effect auxiliary condensate inlet of journey bottom is connected, the triple effect auxiliary condensate outlet of the triple effect auxiliary heater shell side bottom It is connected with triple effect auxiliary condensate line.Falling film evaporator has the advantages that heat transfer efficiency is high, required auxiliary power equipment power is little, But it is not suitable for the solution evaporation for having solid particle or having crystallization to separate out；Concentrate through double flash evaporation two effects are concentrated by the present invention Liquid is sent in triple effect crystallizers from two effect feed liquid outlet tube Jing triple effect crystallizers charging apertures, and the magma of triple effect crystalliser feet is from three Effect crystallizer discharging opening is discharged, and is downwardly into the heating of triple effect auxiliary heater, and the magma after heating enters along triple effect downlink cycle pipe Enter triple effect cycle pump, then under triple effect cycle pumping action, it is up along triple effect uplink cycle pipe and enter to advance into triple effect heater One step is heated, and the magma after heating up again is entered in triple effect crystallizer from triple effect crystallizer circulation port, moisture and remaining organic Solvent evaporates in a large number, and inorganic salt is close to saturation crystal growth, 60 DEG C of triple effects that triple effect crystallizer is produced in triple effect crystallizer Steam is discharged from triple effect crystallizer steam drain.66 DEG C of two effect steam respectively enter triple effect from the outlet of two effect separator gland steam exhausters The triple effect heater air intake on heater shell side top and the triple effect auxiliary heater on triple effect auxiliary heater shell side top enter vapour Mouthful, triple effect magma is heated using the heat of two effect steam.Organic vapor and water vapour in 66 DEG C of two effect steam The triple effect condensed fluid that 66 DEG C are condensed into after heat release in triple effect heater enters triple effect condensate line from triple effect condensate outlet, The two effect condensed fluid entered from triple effect condensate inlet also enter triple effect condensate line after flash distillation heat release in triple effect heater；66 The triple effect that organic vapors and water vapour in DEG C two effect steam are condensed into 66 DEG C after heat release in triple effect auxiliary heater is auxiliary Help condensed fluid triple effect auxiliary condensate line to be entered from triple effect auxiliary condensate outlet, aid in the two of condensate inlet entrance from triple effect Effect condensed fluid also enters triple effect auxiliary condensate line in triple effect auxiliary heater after flash distillation heat release.It is in triple effect crystallizer, dense The circulation of contracting liquid is forced to promote by the larger triple effect cycle pump of power, and flow velocity is high, less scaling, is suitable for having what crystallization was separated out Solution evaporation.Characteristic of the present invention according to solution, first adopts two-stage falling film evaporator concentrate solution, makes when influent concentration is relatively low After the concentration of solution is improved to a certain extent, enter back into triple effect crystallizer and be evaporated crystallization, had two kinds of evaporation modes concurrently Advantage, evaded shortcoming, reduced system dynamic plant capacity, reduced power consumption.
As a further improvement on the present invention, entrance phase of the lower end of the triple effect downlink cycle pipe also with triple effect magma pump Even, the outlet of the triple effect magma pump is connected with the charging aperture of triple effect cyclone, and the top exit of the triple effect cyclone passes through Triple effect magma return duct is connected with the triple effect crystallizer refluxing opening, the outlet at bottom of the triple effect cyclone and entering for stiff tank Mouth is connected, and the outlet at bottom of stiff tank is connected with the upper feed inlet of centrifuge, the solid-phase outlet and salt of the centrifuge Collection system is connected；The stiff tank overfall on the liquid-phase outlet of the centrifuge and the stiff tank top respectively with mother liquor tank Entrance is connected.In triple effect magma, up to 7~10%wt, temperature is 66 DEG C to the concentration of inorganic salt, the part in triple effect downlink cycle pipe Triple effect magma by triple effect magma pumped, into the charging aperture of triple effect cyclone, Jing after the thickening of triple effect cyclone concentration is separated, gently Mutually it is circulated into triple effect crystallizer refluxing opening by triple effect magma return duct, heavy phase is supported into the further concentration of stiff tank Crystalline substance, up to 30~50%wt, temperature is 55 DEG C to the inorganic salt concentration after concentration growing the grain, is separated subsequently into centrifuge, and inorganic salt is brilliant The moisture content of body is discharged from the solid-phase outlet of centrifuge less than 6%wt, and the mother solution of centrifuge is discharged simultaneously from the liquid-phase outlet of centrifuge Collect into mother liquor tank, the mother solution of stiff tank top overflow is collected from stiff tank overfall also into mother liquor tank, in mother liquor tank Inorganic salt concentration is less than 30%wt, and temperature is 45 DEG C.
As a further improvement on the present invention, present invention additionally comprises quadruple effect crystallizer, sets at the top of the quadruple effect crystallizer There is quadruple effect crystallizer steam drain, in the middle part of the circumferential wall of the quadruple effect crystallizer, be provided with quadruple effect crystallizer circulation port and quadruple effect crystallizer Refluxing opening, the bottom of the quadruple effect crystallizer are provided with quadruple effect crystallizer discharging opening；Connect below the quadruple effect crystallizer discharging opening Quadruple effect auxiliary heater is connected to, the discharging opening of the quadruple effect auxiliary heater lower end is circulated with quadruple effect by quadruple effect downlink cycle pipe The entrance of pump is connected, and the outlet of the quadruple effect circulating pump passes through the charging aperture phase of quadruple effect uplink cycle pipe and quadruple effect heater lower end Even, the discharging opening of the quadruple effect heater upper end is connected with the quadruple effect crystallizer circulation port；The triple effect magma outlet tube Outlet is connected with the quadruple effect downlink cycle pipe, and the quadruple effect crystallizer steam drain is connected with quadruple effect crystallizer gland steam exhauster；It is described The outlet of triple effect crystallizer gland steam exhauster is connected with the quadruple effect heater shell side air intake on the quadruple effect heater shell side top, described The outlet of triple effect condensate line is connected with the quadruple effect heater condensate inlet of the quadruple effect heater lower end, the quadruple effect heating The quadruple effect heater condensate outlet of device shell side bottom is connected with quadruple effect condensate line；The outlet of the triple effect crystallizer gland steam exhauster Also it is connected with the quadruple effect auxiliary heater air intake on the quadruple effect auxiliary heater shell side top, the triple effect aids in condensate line Outlet be connected with the quadruple effect auxiliary heater condensate inlet of the quadruple effect auxiliary heater lower end, quadruple effect auxiliary heating The quadruple effect auxiliary heater condensate outlet of device shell side bottom is connected with the quadruple effect condensate line；The quadruple effect condensate line Outlet accesses the entrance of solvent tank, and the bottom of the solvent tank is connected with the entrance of solvent pump, the outlet of the solvent pump with it is molten Agent outlet tube is connected.The mother solution that mother liquor tank is collected is entered by the quadruple effect crystallizer that mother solution pump Jing mother liquor reflux pipe sends into quadruple effect crystallizer In material mouth, the magma of quadruple effect crystalliser feet is discharged from quadruple effect crystallizer discharging opening, is downwardly into the heating of quadruple effect auxiliary heater, Magma after heating enters quadruple effect circulating pump along quadruple effect downlink cycle pipe, triple effect magma also Jing tetra- that triple effect magma outlet tube flows out Effect downlink cycle pipe enters quadruple effect circulating pump, under quadruple effect circulation pumping action, up along quadruple effect uplink cycle pipe and enter quadruple effect Heater is further heated, and the magma after heating up again is entered in quadruple effect crystallizer from quadruple effect crystallizer circulation port, moisture Evaporated with remaining organic solvent in a large number, inorganic salt saturation crystal growth in quadruple effect crystallizer, what quadruple effect crystallizer was produced 51 DEG C of quadruple effect steam are discharged from quadruple effect crystallizer steam drain.Triple effect steam respectively enters four from the outlet of triple effect crystallizer gland steam exhauster The quadruple effect heater air intake on effect heater shell side top and the quadruple effect auxiliary heater on quadruple effect auxiliary heater shell side top enter Steam ports, is heated to quadruple effect magma using the heat of triple effect steam.Organic vapor and water in 60 DEG C of triple effect steam steams Vapour is condensed into 60 DEG C of quadruple effect condensed fluid after heat release in quadruple effect heater and enters quadruple effect condensed fluid from quadruple effect condensate outlet Pipe, the triple effect condensed fluid entered from quadruple effect condensate inlet also enter quadruple effect condensed fluid after flash distillation heat release in quadruple effect heater Pipe.Organic vapor and water vapour in 60 DEG C of triple effect steam is condensed into the four of 60 DEG C after heat release in quadruple effect auxiliary heater Effect auxiliary condensed fluid enters quadruple effect auxiliary condensate line from quadruple effect auxiliary condensate outlet, enters from quadruple effect auxiliary condensate inlet Triple effect auxiliary condensed fluid also enter quadruple effect condensate line after flash distillation heat release in quadruple effect auxiliary heater.Organic solvent and condensation Water enters solvent tank from quadruple effect condensate line, and by solvent pumped, Jing solvent outlet tubes enter later process, and what solvent was pumped out has The temperature of machine solvent and water is 45 DEG C, and organic solvent concentration improves 1% ~ 2%wt than rectification, while the saliferous rate in organic solvent is low In 0.05%wt.
As a further improvement on the present invention, entrance phase of the lower end of the quadruple effect downlink cycle pipe also with quadruple effect magma pump Even, the outlet of the quadruple effect magma pump is connected with the charging aperture of quadruple effect cyclone, and the top exit of the quadruple effect cyclone passes through Quadruple effect magma return duct is connected with the quadruple effect crystallizer refluxing opening, the outlet at bottom of the quadruple effect cyclone and the stiff tank Entrance be connected；The outlet of the mother liquor tank is connected with the entrance of mother solution pump, and the outlet of the mother solution pump passes through mother liquor reflux pipe It is connected with the quadruple effect crystallizer mother liquor inlet in the middle part of the quadruple effect crystallizer circumferential wall.In quadruple effect magma, the concentration of inorganic salt can Up to 25~30%wt, temperature is 55 DEG C, and the part quadruple effect magma in quadruple effect downlink cycle pipe is entered four by quadruple effect magma pumped The charging aperture of effect cyclone, it is Jing after the thickening of quadruple effect cyclone concentration is separated, light phase to be tied into quadruple effect by quadruple effect magma return duct Brilliant device refluxing opening is circulated, and heavy phase enters the further concentration growing the grain of stiff tank, separates subsequently into centrifuge, inorganic salt crystal Discharge from the solid-phase outlet of centrifuge.The present invention can be continuously separated out inorganic salt, seriality behaviour while organic solvent is reclaimed Work can reduce labour force, and improve production efficiency makes inorganic salt and organic solvent all are individually separated out, realizes zero-emission Put, realize the environmental benefit and resource recycling of maximum.The present invention adopts multiple-effect evaporation technique, latter effect to utilize previous effect Indirect steam as thermal source, and the condensed fluid for steaming be used for raw material preheating, greatly save energy consumption, reduce and run into This.
As a further improvement on the present invention, the outlet of the quadruple effect crystallizer gland steam exhauster and surface condenser shell side upper end Air inlet be connected, the condensed fluid of surface condenser shell side lower end row's mouth passes through surface condenser return duct and the solvent The entrance of tank is connected；The air vent of surface condenser shell side lower end is connected with the pump orifice of water-ring vacuum pump, the water The air vent of ring vacuum pumps is connected with vacuum pump discharges pipe, machine water shutoff outlet and the vacuum pump circulation of the water-ring vacuum pump Water pot is connected, and the bottom of vacuum pump circulating water tank is connected with the entrance of water circulating pump, the outlet of the water circulating pump and institute The machine water shutoff entrance for stating water-ring vacuum pump is connected.It is cold that 51 DEG C of quadruple effect steam enter surface from the outlet of quadruple effect crystallizer gland steam exhauster The shell side of condenser, the tube side of surface condenser are passed through cooling water and are condensed into the organic vapor and water vapour in quadruple effect steam Then 40 DEG C of quadruple effect condensed fluid, quadruple effect condensed fluid enter solvent tank, surface condenser shell side by surface condenser return duct Fixed gas extracted out by water-ring vacuum pump, the machine water shutoff of water-ring vacuum pump enters vacuum pump circulating water tank, by water circulating pump Send water-ring vacuum pump back to, realize the closed cycle of machine water shutoff, both reduced the consumption of water, organic solvent can be prevented again to be dissolved in water The machine water shutoff of ring vacuum pump and cause damage.
As a further improvement on the present invention, the stock solution storage tank, the top of solvent tank and it is described two effect falling film evaporator, The shell side top and the bottom of triple effect heater, triple effect auxiliary heater, quadruple effect heater and quadruple effect auxiliary heater are respectively equipped with does not coagulate Gas air vent, each fixed gas air vent are connected with fixed gas exhaust main respectively, the outlet of the fixed gas exhaust main It is connected with the air inlet of the surface condenser upper end；Condensate water pot gland steam exhauster is connected with the top of the condensate water pot, it is described The air vent of the outlet of condensate water pot gland steam exhauster and the effect falling film evaporator shell side top and the bottom is evaporated with described two effects respectively Device air intake is connected or is connected with the fixed gas exhaust main.Incoagulable gas is dissolved with solution, the incoagulability in evaporation The shell side of each vaporizer or heater is entered together with the steam that gas is produced with evaporation, as incoagulable gas can not be condensed, If accumulating in shell side can affect the heat and mass transfer of steam, the heat transfer deterioration of each vaporizer or heater is made.The present invention will be each The incoagulable gas at place is extracted out by fixed gas exhaust main, Jing after surface condenser cooling, is extracted out by water-ring vacuum pump, is carried The heat exchange efficiency of high each vaporizer or heater.When system just starts, can be by the row of an effect falling film evaporator shell side top and the bottom QI KOU is connected with fixed gas exhaust main, and condensate water pot gland steam exhauster is connected with fixed gas exhaust main, so as to fixed gas quilt as early as possible Extract.After system motion is to steady statue, as the fixed gas temperature of an effect falling film evaporator is up to 135 DEG C, condensate water pot Fixed gas temperature up to 98 DEG C, contain a large amount of heat energy, falling film evaporator air vent and fixed gas aerofluxuss are imitated in now cut-out one Valve between house steward, opens one and imitates the valve between falling film evaporator air vent and 2nd effect evaporator air intake；Cut-out condensation Valve between water pot gland steam exhauster and fixed gas exhaust main, opens cut-out condensate water pot gland steam exhauster and 2nd effect evaporator air intake Between valve, make the one of high temperature to imitate the fixed gas of fixed gas and condensate water pot into after two effect falling film evaporator heat releases, then from 2nd effect evaporator air vent Jing fixed gases exhaust main is extracted out, so can both reclaim the heat in high temperature fixed gas, again can be with Mitigate the load of surface condenser.The fixed gas temperature that two effect falling film evaporator shell sides are extracted out is 72 DEG C, and solvent tank is extracted out not Solidifying temperature degree is 45 DEG C, and the fixed gas temperature that triple effect heater and triple effect auxiliary heater shell side are extracted out is 66 DEG C, quadruple effect heating The fixed gas temperature that device and quadruple effect auxiliary heater shell side are extracted out is 60 DEG C, the fixed gas temperature that surface condenser air vent is discharged For 51 DEG C.
Description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description, accompanying drawing only provide with reference to Illustrate to use, be not used to limit the present invention.
Fig. 1 is the embodiment one that saliferous organic solution of the present invention evaporates recovery system.
Fig. 2 is the embodiment two that saliferous organic solution of the present invention evaporates recovery system.
Fig. 3 is the embodiment three that saliferous organic solution of the present invention evaporates recovery system.
In figure：1. one falling film evaporator is imitated；1a. 1st effective evaporator feed liquid ports；1b. mono- imitates feed liquid down pipe；1c. mono- is imitated Circulating pump；1d. 1st effective evaporator circulation fluid entrances；1e. 1st effective evaporator air intakes；1f. 1st effective evaporator air vents；1g. mono- Effect circulation pipe；1h. mono- imitates feed liquid outlet tube；
2. one separator is imitated；2a. mono- imitates separator steam drain；2b. mono- imitates separator material liquid outlet；2c. mono- imitates separator steam discharge Pipe；
3. two falling film evaporator is imitated；3a. 2nd effect evaporator feed liquid ports；3b. bis- imitates feed liquid down pipe；3c. bis- imitates circulating pump； 3d. 2nd effect evaporator circulation fluid entrances；3e. 2nd effect evaporator air intakes；3f. 2nd effect evaporator air vents；The effect circulations of 3g. bis- Pipe；3h. bis- imitates feed liquid outlet tube；
4. two separator is imitated；4a. bis- imitates separator steam drain；4b. bis- imitates separator material liquid outlet；4c. bis- imitates separator steam discharge Pipe；
5. triple effect crystallizer；5a. triple effect crystallizer charging apertures；5b. triple effect crystallizer steam drains；5c. triple effect crystallizer circulation ports； 5d. triple effect crystallizer refluxing openings；5e. triple effect crystallizer discharging openings；5f. triple effect downlink cycle pipes；5g. triple effect cycle pumps；5h. tri- Effect uplink cycle pipe；5j. triple effect crystallizer gland steam exhausters；
6. triple effect heater；6a. triple effect heater air intakes；6b. triple effect condensate outlets；6c. triple effect condensate inlets；
7. triple effect auxiliary heater；7a. triple effect auxiliary heater air intakes；7b. triple effects aid in condensate outlet；7c. triple effects are auxiliary Help condensate inlet；
8. quadruple effect crystallizer；8a. quadruple effect crystallizer mother liquor inlets；8b. quadruple effect crystallizer steam drains；8c. quadruple effect crystallizers are followed Collar extension；8d. quadruple effect crystallizer refluxing openings；8e. quadruple effect crystallizer discharging openings；8f. quadruple effect downlink cycle pipes；8g. quadruple effect circulating pumps； 8h. quadruple effect uplink cycle pipes；8j. quadruple effect crystallizer gland steam exhausters；
9. quadruple effect heater；9a. quadruple effect heater air intakes；9b. quadruple effect heater condensate outlets；9c. quadruple effect heaters are cold Lime set entrance；
10. quadruple effect auxiliary heater；10a. quadruple effect auxiliary heater air intakes；10b. quadruple effect auxiliary heater condensate outlets； 10c. quadruple effect auxiliary heater condensate inlets；
11. stiff tanks；11a. stiff tank overfalls；
12. centrifuges；12a. centrifuge liquid-phase outlets；12b. centrifuge solid-phase outlets；
T1. stock solution storage tank；T2. condensate water pot；T3. mother liquor tank；T4. solvent tank；T5. vacuum pump circulating water tank；
B1. feed pump；B2. condensate pump；B3. triple effect magma pump；B4. quadruple effect magma pump；B5. solvent pump；B6. mother solution pump；B7. Water-ring vacuum pump；B8. water circulating pump；
G1. stock solution pipe；G2. give birth to steam pipe；G3. condensed water feed pipe；G4. condensing hot air furnace pipe；G5. high-temperature condensation water backflow Pipe；G6. one imitate condensate pipe；G7. two imitate condensate line；G8. triple effect magma outlet tube；G9. triple effect condensate line；G10. triple effect Auxiliary condensate line；G11. triple effect magma return duct；G12. quadruple effect condensate line；G13. quadruple effect magma return duct；G14. mother solution Return duct；G15. solvent outlet tube；G16. fixed gas exhaust main；G17. vacuum pump discharges pipe；
H1. one-level preheater；H2. two grades of preheaters；H3. surface condenser；
S1. triple effect cyclone；S2. quadruple effect cyclone.
Specific embodiment
As shown in figure 1, the saliferous organic solution evaporation recovery system of the present invention includes that the effect falling liquid films of stock solution storage tank T1 and steam Device 1 is sent out, the outlet of stock solution storage tank T1 is connected with the entrance of feed pump B1, the bottom of an effect falling film evaporator 1 is connected with an effect material Liquid down pipe 1b, is provided with 1st effective evaporator feed liquid port 1a, the outlet of feed pump B1 and in the middle part of an effect feed liquid down pipe 1b One effect feed liquid down pipe 1b of 1 bottom of effect falling film evaporator is connected, and the 1st effective evaporator on an effect falling film evaporator shell side top enters Steam ports 1e is connected with raw steam pipe G2, and the 1st effective evaporator condensation-water drain of an effect falling film evaporator shell side bottom is cold by an effect Solidifying water pipe G6 is connected with the entrance of condensate water pot T2；The feed separation mouth of one 1 bottom of effect falling film evaporator passes through communicating pipe and one Effect separator 2 is connected, and the effect separator steam drain 2a at the top of an effect separator 2 is connected with an effect separator gland steam exhauster 2c, and one One effect separator material liquid outlet 2b of 2 bottom of effect separator is connected with an effect feed liquid down pipe 1b, an effect feed liquid down pipe 1b's Lower end is connected with the entrance of an effect circulating pump 1c, and the outlet of an effect circulating pump 1c is by an effect circulation pipe 1g and an effect falling film evaporation 1st effective evaporator circulation fluid entrance 1d at the top of device 1 is connected, and the outlet of an effect circulating pump 1c is also associated with an effect feed liquid outlet tube 1h。
Saliferous organic solution stock solution Jing stock solution pipe G1 enters stock solution storage tank T1, and inorganic salt content is 1~1.5%wt, and temperature is 25 DEG C, it is preheated after be warming up to 60 DEG C, by feed pump B1 send into one imitate falling film evaporator 1 1st effective evaporator feed liquid port 1a, With an effect concentrated solution of 1 bottom of effect falling film evaporator and an effect concentrated solution of 2 bottom of effect separator jointly along an effect feed liquid Down pipe 1b flows downward, and is extracted out by an effect circulating pump 1c, and the effect circulation pipe 1g of Jing mono- are sent at the top of an effect falling film evaporator 1 1st effective evaporator circulation fluid entrance 1d；135 DEG C of raw steam that raw steam pipe G2 is provided are entered from 1st effective evaporator air intake 1e The shell side of one effect falling film evaporator 1 is heated to the effect circulation concentrated solution flowed down along falling liquid film tube wall, 100 DEG C of an effect steam Condensed water enters condensate water pot T2 recovery from 1st effective evaporator condensation-water drain and an effect condensate pipe G6；An effect after heating is dense Contracting liquid is imitated into one from communicating pipe and is separated in separator 2, and 72 DEG C of an effect steam is entered from an effect separator steam drain 2a One effect separator gland steam exhauster 2c, the main component of an effect steam is organic vapor；An effect concentrated solution after concentration enters one The 1c circulations of effect circulating pump, the effect concentrated solution of part one of an effect circulating pump 1c outlets are discharged from an effect feed liquid outlet tube 1h.Through one The evaporation and concentration of effect falling film evaporator 1, organic solvent are evaporated in a large number, and the concentration of inorganic salt solution is improved, and is subsequently to enter One step concentrating and separating provides condition.
The saliferous organic solution evaporation recovery system of the present invention is also including two effect falling film evaporators 3, two effect falling film evaporators 3 Bottom be connected with two effect feed liquid down pipe 3b, be provided with 2nd effect evaporator feed liquid port 3a in the middle part of two effect feed liquid down pipe 3b, 2nd effect evaporator feed liquid port 3a is connected with the outlet of an effect feed liquid outlet tube 1h, the outlet and two of an effect separator gland steam exhauster 2c The 2nd effect evaporator air intake 3e on 3 shell side top of effect falling film evaporator is connected, and two effects of two effect falling film evaporator shell side bottoms are steamed Send out device condensate outlet to be connected with two effect condensate line G7；The feed separation mouth of two 3 bottoms of effect falling film evaporator passes through communicating pipe It is connected with two effect separators 4, the two effect separator steam drain 4a and two at the top of two effect separators 4 imitate separator gland steam exhauster 4c phases Even, two effect separator material liquid outlet 4b of two 4 bottoms of effect separator are connected with two effect feed liquid down pipe 3b, two effect feed liquid down pipes The lower end of 3b is connected with the entrance of two effect circulating pump 3c, and the outlet of two effect circulating pump 3c is by two effect circulation pipe 3g and two effect falling liquid films 2nd effect evaporator circulation fluid entrance 3d at the top of vaporizer 3 is connected, and it is defeated that two outlets for imitating circulating pump 3c are also associated with two effect feed liquids Outlet pipe 3h.
Inorganic salt content is 2~3%wt, and temperature is that 73 DEG C of an effect concentrated solution is imitated after feed liquid outlet tube 1h discharges from one, with Two effect concentrated solutions of two effect concentrated solutions of two 3 bottoms of effect falling film evaporator and two 4 bottoms of effect separator are jointly under two effect feed liquids Row pipe 3b flows downward, and is extracted out by two effect circulating pump 3c, and the effect circulation pipe 3g of Jing bis- are sent at the top of two effect falling film evaporators 3 2nd effect evaporator circulation fluid entrance 3d；Organic vapor is mainly in the effect steam that one effect separator 2 is produced, also contains portion After dividing water vapour, an effect steam to discharge from an effect separator gland steam exhauster 2c, falling liquid films are imitated into two from 2nd effect evaporator air intake 3e Vaporizer shell side, the two effect circulation concentrated solutions to flowing down along falling liquid film tube wall are heated, and 72 DEG C of two effect condensed fluid is from two effect evaporations Device condensate outlet and two effect condensate line G7 are discharged；During two effect concentrated solutions after heating are from communicating pipe into two effect separators 4 Separated, organic solvent and moisture continue evaporation and becomes two effect steam, and 66 DEG C of two effect steam imitates separator steam drain 4a from two Into two effect separator gland steam exhauster 4c；Two effect concentrated solutions after concentration are into two effect circulating pump 3c circulations, part inorganic salt content For 4~6%wt, temperature is that 68 DEG C of two effect concentrated solutions are discharged from two effect feed liquid outlet tube 3h.Two effect falling film evaporators 3 utilize one The effect steam that effect separator 2 is produced further is concentrated to an effect concentrated solution, has both been reclaimed the waste heat that an effect is produced, has been entered again Step evaporation organic solvent and improve the concentration of inorganic salt solution.
As shown in Fig. 2 the saliferous organic solution evaporation recovery system of the present invention also includes one-level preheater H1, condensate water pot The outlet at bottom of T2 is connected with the entrance of condensate pump B2, and the outlet of condensate pump B2 is pre- with one-level by condensed water feed pipe G3 The one-level preheater water inlet of hot device H1 is connected, one-level preheater outlet and the condensing hot air furnace pipe G4 phases of one-level preheater H1 Even, the one-level preheater feed liquid port of one-level preheater H1 is connected with the outlet of feed pump B1, and the one-level of one-level preheater H1 is pre- Hot device material liquid outlet is connected with 1st effective evaporator feed liquid port 1a.
98 DEG C one effect steam condensate (SC) be condensed from condensate water pot T2 water pump B2 extraction, into one-level preheater H1's Tube side is preheated to the saliferous organic solution stock solution of shell side, the temperature of stock solution is improved to 45 DEG C, the effect steam after heat release Condensate temperature is 40 DEG C, enters condensation water recovery system by condensing hot air furnace pipe G4, has both reclaimed the heat of condensed water, and The load of an effect falling film evaporator 1 is reduced, raw steam consumption is reduced.
As shown in figure 3, the saliferous organic solution evaporation recovery system of the present invention also includes two grades of preheater H2, one-level preheating Device material liquid outlet is connected with two grades of preheater feed liquid ports of two grades of preheater H2, two grades of preheater feed liquids of two grades of preheater H2 Outlet is connected with 1st effective evaporator feed liquid port 1a；Two grades of preheater air intakes of two grades of preheater H2 and raw steam pipe G2 phases Even, water inlet of the two grades of preheater condensed water row's mouths of two grades of preheater H2 by high-temperature condensation water return duct G5 and condensate water pot T2 Mouth is connected.
135 DEG C of raw steam are further heated into the tube side of two grades of preheater H2 to the stock solution preheated through one-level, The temperature of stock solution is made to continue to improve to 60 DEG C, 100 after heat release DEG C high-temperature condensation water is entered by high-temperature condensation water return duct G5 Condensate water pot T2, then one-level preheater H1 is sent to by condensate pump B2 carries out further heat release, stock solution temperature after two-stage preheating Degree is increased substantially, and is greatly reduced the load of an effect falling film evaporator 1, is further reduced raw steam consumption.
The saliferous organic solution evaporation recovery system of the present invention also includes triple effect crystallizer 5, and the top of triple effect crystallizer 5 sets There is triple effect crystallizer steam drain 5b, in the middle part of the circumferential wall of triple effect crystallizer 5, be provided with triple effect crystallizer charging aperture 5a, triple effect crystallizer Circulation port 5c and triple effect crystallizer refluxing opening 5d, the bottom of triple effect crystallizer 5 are provided with triple effect crystallizer discharging opening 5e, triple effect crystallization Device charging aperture 5a is connected with the outlet of two effect feed liquid outlet tube 3h；Triple effect auxiliary is connected with below triple effect crystallizer discharging opening 5e Heater 7, the discharging opening of 7 lower end of triple effect auxiliary heater pass through the entrance phase of triple effect downlink cycle pipe 5f and triple effect cycle pump 5g Even, the outlet of triple effect cycle pump 5g is connected with the charging aperture of 6 lower end of triple effect heater by triple effect uplink cycle pipe 5h, and triple effect adds The discharging opening of 6 upper end of hot device is connected with triple effect crystallizer circulation port 5c, and the outlet of triple effect cycle pump 5g is also associated with triple effect magma Outlet tube G8；Triple effect crystallizer steam drain 5b is connected with triple effect crystallizer gland steam exhauster 5j.
The outlet of two effect separator gland steam exhauster 4c and the triple effect heater air intake 6a phases on 6 shell side top of triple effect heater Even, the outlet of two effect condensate line G7 is connected with the triple effect condensate inlet 6c of 6 shell side bottom of triple effect heater, triple effect heater The triple effect condensate outlet 6b of 6 shell side bottoms is connected with triple effect condensate line G9；Two effect separator gland steam exhauster 4c outlet also with The triple effect auxiliary heater air intake 7a on 7 shell side top of triple effect auxiliary heater is connected, the outlet of two effect condensate line G7 also with The triple effect auxiliary condensate inlet 7c of 7 shell side bottom of triple effect auxiliary heater is connected, and the three of 7 shell side bottom of triple effect auxiliary heater Effect auxiliary condensate outlet 7b is connected with triple effect auxiliary condensate line G10.
Concentrate through double flash evaporation two effect concentrated solutions are entered by the present invention from two effect feed liquid outlet tube 3h Jing triple effect crystallizers Material mouth 5a is sent in triple effect crystallizer 5, and the magma of 5 bottom of triple effect crystallizer is discharged from triple effect crystallizer discharging opening 5e, is entered downwards Enter triple effect auxiliary heater 7 to heat, the magma after heating enters triple effect cycle pump 5g along triple effect downlink cycle pipe 5f, then in triple effect It is under circulating pump 5g effects, up along triple effect uplink cycle pipe 5h and further heated into triple effect heater 6, heat up again Magma afterwards is entered in triple effect crystallizer 5 from triple effect crystallizer circulation port 5c, and moisture and remaining organic solvent evaporate in a large number, nothing Machine salt is close to saturation crystal growth in triple effect crystallizer 5, and 60 DEG C of triple effect steam that triple effect crystallizer 5 is produced are crystallized from triple effect Device steam drain 5b is discharged.66 DEG C of two effect steam respectively enter 6 shell of triple effect heater from the outlet of two effect separator gland steam exhauster 4c The triple effect auxiliary heater air intake 7a on the 7 shell side top of triple effect heater air intake 6a and triple effect auxiliary heater on journey top, Triple effect magma is heated using the heat of two effect steam.
Organic vapor and water vapour in 66 DEG C of two effect steam is condensed into 66 DEG C after heat release in triple effect heater 6 Triple effect condensed fluid enter triple effect condensate line G9 from triple effect condensate outlet 6b, from triple effect condensate inlet 6c enter two effects Condensed fluid also enters triple effect condensate line G9 in triple effect heater 6 after flash distillation heat release；
Organic vapor and water vapour in 66 DEG C of two effect steam is condensed into 66 DEG C after heat release in triple effect auxiliary heater 7 Triple effect aids in condensed fluid to enter triple effect auxiliary condensate line G10 from triple effect auxiliary condensate outlet 7b, aids in condensed fluid from triple effect The two effect condensed fluid that entrance 7c is entered also enter triple effect auxiliary condensate line G10 in triple effect auxiliary heater 7 after flash distillation heat release.
The lower end of triple effect downlink cycle pipe 5f is also connected with the entrance of triple effect magma pump B3, the outlet of triple effect magma pump B3 with The charging aperture of triple effect cyclone S1 is connected, and the top exit of triple effect cyclone S1 is tied with triple effect by triple effect magma return duct G11 Brilliant device refluxing opening 5d is connected, and the outlet at bottom of triple effect cyclone S1 is connected with the entrance of stiff tank 11, and the bottom of stiff tank 11 goes out Mouth is connected with the upper feed inlet of centrifuge 12, and centrifuge solid-phase outlet 12b of centrifuge 12 is connected with salt collection system；Centrifugation The stiff tank overfall 11a on 11 top of centrifuge liquid-phase outlet 12a and stiff tank of machine 12 entrance phases respectively with mother liquor tank T3 Even.
In triple effect magma, up to 7~10%wt, temperature is 66 DEG C to the concentration of inorganic salt, the portion in triple effect downlink cycle pipe 5f Triple effect magma is divided to be extracted out by triple effect magma pump B3, into the charging aperture of triple effect cyclone S1, Jing triple effect cyclone S1 concentration thickenings After separation, light phase to be circulated into triple effect crystallizer refluxing opening 5d by triple effect magma return duct G11, heavy phase enters stiff tank 11 further concentration growing the grains, up to 30~50%wt, temperature is 55 DEG C to the inorganic salt concentration after concentration growing the grain, subsequently into centrifugation Machine 12 is separated, and the moisture content of inorganic salt crystal is discharged from centrifuge solid-phase outlet 12b of centrifuge 12 less than 6%wt, centrifuge Mother solution escapes and enter mother liquor tank T3 collections, the mother of 11 top overflow of stiff tank from the centrifuge liquid-phase outlet 12a of centrifuge 12 Liquid is collected from stiff tank overfall 11a also into mother liquor tank T3, and the inorganic salt concentration in mother liquor tank T3 is less than 30%wt, and temperature is 45℃。
The saliferous organic solution evaporation recovery system of the present invention also includes quadruple effect crystallizer 8, and the top of quadruple effect crystallizer 8 sets There is quadruple effect crystallizer steam drain 8b, in the middle part of the circumferential wall of quadruple effect crystallizer 8, be provided with quadruple effect crystallizer circulation port 8c and quadruple effect crystallization Device refluxing opening 8d, the bottom of quadruple effect crystallizer 8 are provided with quadruple effect crystallizer discharging opening 8e；Connect below quadruple effect crystallizer discharging opening 8e Quadruple effect auxiliary heater 10 is connected to, the discharging opening of 10 lower end of quadruple effect auxiliary heater is followed with quadruple effect by quadruple effect downlink cycle pipe 8f The entrance of ring pump 8g is connected, and the outlet of quadruple effect circulating pump 8g is entered by quadruple effect uplink cycle pipe 8h and 9 lower end of quadruple effect heater Material mouth is connected, and the discharging opening of 9 upper end of quadruple effect heater is connected with quadruple effect crystallizer circulation port 8c；Triple effect magma outlet tube G8's goes out Mouth is connected with quadruple effect downlink cycle pipe 8f, and quadruple effect crystallizer steam drain 8b is connected with quadruple effect crystallizer gland steam exhauster 8j.
The quadruple effect heater shell side air intake phase on the outlet of triple effect crystallizer gland steam exhauster 5j and 9 shell side top of quadruple effect heater Even, the outlet of triple effect condensate line G9 is connected with the quadruple effect heater condensate inlet 9c of 9 lower end of quadruple effect heater, quadruple effect heating The quadruple effect heater condensate outlet 9b of 9 shell side bottom of device is connected with quadruple effect condensate line G12；Triple effect crystallizer gland steam exhauster 5j's Outlet is also connected with the quadruple effect auxiliary heater air intake 10a on 10 shell side top of quadruple effect auxiliary heater, triple effect auxiliary condensed fluid The outlet of pipe G10 is connected with the quadruple effect auxiliary heater condensate inlet 10c of 10 lower end of quadruple effect auxiliary heater, and quadruple effect auxiliary adds The quadruple effect auxiliary heater condensate outlet 10b of hot device shell side bottom is connected with quadruple effect condensate line G12；Quadruple effect condensate line The outlet of G12 accesses the entrance of solvent tank T4, and the bottom of solvent tank T4 is connected with the entrance of solvent pump B5, the outlet of solvent pump B5 It is connected with solvent outlet tube G15.
The mother solution that mother liquor tank T3 is collected is sent into the quadruple effect crystallization of quadruple effect crystallizer 8 by mother solution pump B6 Jing mother liquor reflux pipes G14 In device charging aperture, the magma of 8 bottom of quadruple effect crystallizer is discharged from quadruple effect crystallizer discharging opening 8e, is downwardly into quadruple effect auxiliary heating Device 10 is heated, and the magma after heating enters quadruple effect circulating pump 8g along quadruple effect downlink cycle pipe 8f, and triple effect magma outlet tube G8 flows out Triple effect magma also Jing quadruple effects downlink cycle pipe 8f enter quadruple effect circulating pump 8g, quadruple effect circulating pump 8g effect under, along quadruple effect Row circulation pipe 8h is up and is further heated into quadruple effect heater 9, and the magma after heating up again is followed from quadruple effect crystallizer Collar extension 8c is entered in quadruple effect crystallizer 8, and moisture and remaining organic solvent evaporate in a large number, and inorganic salt is embezzled in quadruple effect crystallizer 8 With simultaneously crystal growth, 51 DEG C of quadruple effect steam that quadruple effect crystallizer 8 is produced are from quadruple effect crystallizer steam drain 8b discharges.Triple effect steam from The outlet of triple effect crystallizer gland steam exhauster 5j respectively enters the quadruple effect heater air intake 9a and quadruple effect on 9 shell side top of quadruple effect heater The quadruple effect auxiliary heater air intake 10a on 10 shell side top of auxiliary heater, is entered to quadruple effect magma using the heat of triple effect steam Row heating.
Organic vapor and water vapour in 60 DEG C of triple effect steam is condensed into 60 DEG C after heat release in quadruple effect heater 9 Quadruple effect condensed fluid enter quadruple effect condensate line G12 from quadruple effect condensate outlet, from quadruple effect condensate inlet enter triple effect it is cold Lime set also enters quadruple effect condensate line G12 in quadruple effect heater 9 after flash distillation heat release.
Organic vapor and water vapour in 60 DEG C of triple effect steam is being condensed into after heat release in quadruple effect auxiliary heater 10 60 DEG C of quadruple effect aids in condensed fluid to enter quadruple effect auxiliary condensate line from quadruple effect auxiliary condensate outlet, aids in condensed fluid from quadruple effect The triple effect auxiliary condensed fluid that entrance is entered also enters quadruple effect condensate line G12 in quadruple effect auxiliary heater 10 after flash distillation heat release.
Organic solvent and condensed water enter solvent tank T4 from quadruple effect condensate line G12, are extracted out by solvent pump B5, the output of Jing solvents Pipe G15 enters later process, and the organic solvent and the temperature of water that solvent pump B5 sends is 45 DEG C, and organic solvent concentration is carried than rectification High 1% ~ 2%wt, while the saliferous rate in organic solvent is less than 0.05%wt.
The lower end of quadruple effect downlink cycle pipe 8f is also connected with the entrance of quadruple effect magma pump B4, the outlet of quadruple effect magma pump B4 with The charging aperture of quadruple effect cyclone S2 is connected, and the top exit of quadruple effect cyclone S2 is tied with quadruple effect by quadruple effect magma return duct G13 Brilliant device refluxing opening 8d is connected, and the outlet at bottom of quadruple effect cyclone S2 is connected with the entrance of stiff tank 11；The outlet of mother liquor tank T3 with The entrance of mother solution pump B6 is connected, and the outlet of mother solution pump B6 is by four in the middle part of mother liquor reflux pipe G14 and 8 circumferential wall of quadruple effect crystallizer Effect crystallizer mother liquor inlet 8a is connected.
In quadruple effect magma, up to 25~30%wt, temperature is 55 DEG C to the concentration of inorganic salt, the portion in quadruple effect downlink cycle pipe 8f Quadruple effect magma is divided to be extracted out by quadruple effect magma pump B4, into the charging aperture of quadruple effect cyclone S2, Jing quadruple effect cyclone S2 concentration thickenings After separation, light phase to be circulated into quadruple effect crystallizer refluxing opening 8d by quadruple effect magma return duct G13, heavy phase enters stiff tank 11 further concentration growing the grains, separate subsequently into centrifuge 12, and inorganic salt crystal is discharged from the solid-phase outlet of centrifuge 12.This It is bright reclaim organic solvent while, inorganic salt can be continuously separated out, inorganic salt and organic solvent respectively all is isolated by Come, realize zero-emission., using the indirect steam of previous effect as thermal source, and the condensed fluid for steaming is pre- for raw material for latter effect Heat, greatlys save energy consumption, reduces operating cost.
The outlet of quadruple effect crystallizer gland steam exhauster 8j is connected with the air inlet of surface condenser H3 shell sides upper end, surface condenser Condensed fluid row's mouth of H3 shell sides lower end is connected with the entrance of solvent tank T4 by surface condenser return duct；Surface condenser H3 shells The air vent of journey lower end is connected with the pump orifice of water-ring vacuum pump B7, the air vent and vacuum pump discharges of water-ring vacuum pump B7 Pipe G17 is connected, and the machine water shutoff outlet of water-ring vacuum pump B7 is connected with vacuum pump circulating water tank T5, vacuum pump circulating water tank T5's Bottom is connected with the entrance of water circulating pump B8, and the outlet of water circulating pump B8 is connected with the machine water shutoff entrance of water-ring vacuum pump B7.
51 DEG C of quadruple effect steam enter the shell side of surface condenser H3, surface condensation from the outlet of quadruple effect crystallizer gland steam exhauster 8j The tube side of device H3 is passed through the quadruple effect condensed fluid that the organic vapor and water vapour in quadruple effect steam is condensed into cooling water 40 DEG C, Then quadruple effect condensed fluid enters solvent tank T4 by surface condenser return duct, and the fixed gas of surface condenser H3 shell sides is by water ring Formula vacuum pump B7 is extracted out, and the machine water shutoff of water-ring vacuum pump B7 enters vacuum pump circulating water tank T5, sends water back to by water circulating pump B8 Ring vacuum pumps B7, realizes the closed cycle of machine water shutoff, has both reduced the consumption of water, organic solvent can be prevented again to be dissolved in water ring true The machine water shutoff of empty pump and cause damage.
Stock solution storage tank T1, the top of solvent tank T4 and two effect falling film evaporators 3, triple effect heater 6, triple effect auxiliary heater 7th, the shell side top and the bottom of quadruple effect heater 9 and quadruple effect auxiliary heater 10 are respectively equipped with fixed gas air vent, each fixed gas aerofluxuss Mouthful be connected with fixed gas exhaust main G16 respectively, the outlet of fixed gas exhaust main G16 and the air inlet of surface condenser H3 upper ends Mouth is connected；Condensate water pot gland steam exhauster is connected with the top of condensate water pot T2, the outlet of condensate water pot gland steam exhauster and an effect falling liquid film steam The air vent for sending out device shell side top and the bottom is connected or is connected with fixed gas exhaust main G16 with 2nd effect evaporator air intake 3e respectively.
Incoagulable gas everywhere is extracted out by the present invention by fixed gas exhaust main G16, Jing surface condensers H3 coolings Afterwards, extracted out by water-ring vacuum pump B7, improve the heat exchange efficiency of each vaporizer or heater.When system just starts, can be by one The air vent of effect falling film evaporator shell side top and the bottom is connected with fixed gas exhaust main G16, condensate water pot gland steam exhauster and fixed gas Exhaust main G16 is connected, so that fixed gas is extracted as early as possible.
After system motion is to steady statue, as the fixed gas temperature of an effect falling film evaporator 1 is up to 135 DEG C, condensation The fixed gas temperature of water pot T2 contains a large amount of heat energy up to 98 DEG C, and the 1st effective evaporator of falling film evaporator 1 is imitated in now cut-out one Valve between air vent 1f and fixed gas exhaust main G16, opens 1st effective evaporator air vent 1f and enters vapour with 2nd effect evaporator Valve between mouth 3e；Valve between cut-out condensate water pot gland steam exhauster and fixed gas exhaust main G16, opens cut-out condensed water Valve between tank gland steam exhauster and 2nd effect evaporator air intake 3e, makes the one of the high temperature fixed gas for imitating fixed gas and condensate water pot T2 Into after two effect 3 heat releases of falling film evaporator, then extract out from 2nd effect evaporator air vent 3f Jing fixed gas exhaust mains G16, so The heat in high temperature fixed gas can be both reclaimed, the load of surface condenser H3 can have been mitigated again.
The fixed gas temperature that two 3 shell sides of effect falling film evaporator are extracted out is 72 DEG C, and the fixed gas temperature that solvent tank T4 is extracted out is 45 DEG C, the fixed gas temperature that triple effect heater 6 and 7 shell side of triple effect auxiliary heater are extracted out is 66 DEG C, quadruple effect heater 9 and quadruple effect The fixed gas temperature that 10 shell side of auxiliary heater is extracted out is 60 DEG C, and the fixed gas temperature that surface condenser air vent is discharged is 51 ℃。
The saliferous organic solution of the present invention can be the methanol aqueous solution of Sodium Chloride, and the inorganic salt is Sodium Chloride, described Organic solvent is methanol.
The foregoing is only the preferable possible embodiments of the present invention, patent protection model that is non-therefore limiting to the present invention Enclose.In addition to the implementation, the present invention can also have the skill that other embodiment, all employing equivalents or equivalent transformation are formed Art scheme, all falls within the protection domain of application claims.The present invention can pass through or using existing without the technical characteristic of description There is technology to realize, will not be described here.

Claims (10)

1. a kind of saliferous organic solution evaporates recovery system, including stock solution storage tank, outlet and the feed pump of the stock solution storage tank Entrance is connected, it is characterised in that：Also including an effect falling film evaporator, the bottom of the effect falling film evaporator is connected with an effect material Liquid down pipe, is provided with 1st effective evaporator feed liquid port, the outlet of the feed pump and in the middle part of the effect feed liquid down pipe One effect feed liquid down pipe of effect falling film evaporator bottom is connected, and the 1st effective evaporator on the effect falling film evaporator shell side top enters Steam ports is connected with raw steam pipe, and the 1st effective evaporator condensation-water drain of the effect falling film evaporator shell side bottom is cold by an effect Solidifying water pipe is connected with the entrance of condensate water pot；The feed separation mouth of the one effect falling film evaporator bottom is by communicating pipe and an effect Separator is connected, and the effect separator steam drain at the top of the effect separator is connected with an effect separator gland steam exhauster, and described one One effect separator material liquid outlet of effect separator bottom is connected with described one effect feed liquid down pipe, the effect feed liquid down pipe Lower end is connected with the entrance of an effect circulating pump, and the outlet of the effect circulating pump is by an effect circulation pipe and an effect falling film evaporator The 1st effective evaporator circulation fluid entrance at top is connected, and the outlet of the effect circulating pump is also associated with an effect feed liquid outlet tube.
2. saliferous organic solution according to claim 1 evaporates recovery system, it is characterised in that：Also steam including two effect falling liquid films Device is sent out, the bottom of the two effects falling film evaporator is connected with two effect feed liquid down pipes, sets in the middle part of the two effects feed liquid down pipe There is 2nd effect evaporator feed liquid port, the 2nd effect evaporator feed liquid port is connected with the outlet of described one effect feed liquid outlet tube, institute The outlet for stating an effect separator gland steam exhauster is connected with the 2nd effect evaporator air intake on described two effect falling film evaporator shell side tops, institute The 2nd effect evaporator condensate outlet for stating two effect falling film evaporator shell side bottoms is connected with two effect condensate lines；The two effects falling liquid film The feed separation mouth of vaporizer bottom was connected with two effect separators by communicating pipe, and two effects at the top of the two effects separator are separated Device steam drain is connected with two effect separator gland steam exhausters, the two effect separator material liquid outlets and described two of the two effects separator bottom Effect feed liquid down pipe is connected, and the lower end of the two effects feed liquid down pipe is connected with the entrance of two effect circulating pumps, the two effects circulation The outlet of pump is connected with the 2nd effect evaporator circulation fluid entrance at the top of two effect falling film evaporators by two effect circulation pipes, two effect The outlet of circulating pump is also associated with two effect feed liquid outlet tubes.
3. saliferous organic solution according to claim 1 evaporates recovery system, it is characterised in that：Also preheat including one-level Device, the outlet at bottom of the condensate water pot are connected with the entrance of condensate pump, and the outlet of the condensate pump is supplied by condensed water Water pipe is connected with the one-level preheater water inlet of the one-level preheater, the one-level preheater outlet of the one-level preheater with Condensing hot air furnace pipe is connected, and the one-level preheater feed liquid port of the one-level preheater is connected with the outlet of the feed pump, institute The one-level preheater material liquid outlet for stating one-level preheater is connected with the 1st effective evaporator feed liquid port.
4. saliferous organic solution according to claim 3 evaporates recovery system, it is characterised in that：Also preheat including two grades Device, the one-level preheater material liquid outlet are connected with two grades of preheater feed liquid ports of two grades of preheaters, and described two grades pre- Two grades of preheater material liquid outlets of hot device are connected with the 1st effective evaporator feed liquid port；Two grades of preheatings of two grades of preheaters Device air intake is connected with the raw steam pipe, and two grades of preheater condensed water row's mouths of two grades of preheaters pass through high-temperature condensation water Return duct is connected with the water inlet of the condensate water pot.
5. saliferous organic solution according to claim 2 evaporates recovery system, it is characterised in that：Also crystallize including triple effect Device, is provided with triple effect crystallizer steam drain, is provided with three in the middle part of the circumferential wall of the triple effect crystallizer at the top of the triple effect crystallizer Effect crystallizer charging aperture, triple effect crystallizer circulation port and triple effect crystallizer refluxing opening, the bottom of the triple effect crystallizer is provided with three Effect crystallizer discharging opening, the triple effect crystallizer charging aperture are connected with the outlet of described two effect feed liquid outlet tubes；The triple effect knot Triple effect auxiliary heater is connected with below brilliant device discharging opening, the discharging opening of the triple effect auxiliary heater lower end is by under triple effect Row circulation pipe is connected with the entrance of triple effect cycle pump, and the outlet of the triple effect cycle pump is added by triple effect uplink cycle pipe and triple effect The charging aperture of hot device lower end is connected, and the discharging opening of the triple effect heater upper end is connected with the triple effect crystallizer circulation port, institute The outlet for stating triple effect cycle pump is also associated with triple effect magma outlet tube；The triple effect crystallizer steam drain and triple effect crystallizer steam discharge Pipe is connected；The outlet of the two effects separator gland steam exhauster and the triple effect heater air intake phase on the triple effect heater shell side top Even, the outlet of the two effects condensate line is connected with the triple effect condensate inlet of the triple effect heater shell side bottom, and described three The triple effect condensate outlet of effect heater shell side bottom is connected with triple effect condensate line；The outlet of the two effects separator gland steam exhauster Also it is connected with the triple effect auxiliary heater air intake on the triple effect auxiliary heater shell side top, described two imitate going out for condensate line Mouth is also connected with the triple effect auxiliary condensate inlet of the triple effect auxiliary heater shell side bottom, the triple effect auxiliary heater shell The triple effect auxiliary condensate outlet of journey bottom is connected with triple effect auxiliary condensate line.
6. saliferous organic solution according to claim 5 evaporates recovery system, it is characterised in that：The triple effect downlink cycle The lower end of pipe is also connected with the entrance of triple effect magma pump, the outlet of the triple effect magma pump and the charging aperture phase of triple effect cyclone Even, the top exit of the triple effect cyclone is connected with the triple effect crystallizer refluxing opening by triple effect magma return duct, described The outlet at bottom of triple effect cyclone is connected with the entrance of stiff tank, and the outlet at bottom of the stiff tank is fed with the top of centrifuge Mouth is connected, and the solid-phase outlet of the centrifuge is connected with salt collection system；The liquid-phase outlet of the centrifuge and the stiff tank The stiff tank overfall on top is connected with the entrance of mother liquor tank respectively.
7. saliferous organic solution according to claim 6 evaporates recovery system, it is characterised in that：Also crystallize including quadruple effect Device, is provided with quadruple effect crystallizer steam drain, is provided with four in the middle part of the circumferential wall of the quadruple effect crystallizer at the top of the quadruple effect crystallizer Effect crystallizer circulation port and quadruple effect crystallizer refluxing opening, the bottom of the quadruple effect crystallizer is provided with quadruple effect crystallizer discharging opening；Institute State and below quadruple effect crystallizer discharging opening, be connected with quadruple effect auxiliary heater, the discharging opening of the quadruple effect auxiliary heater lower end leads to The entrance that quadruple effect downlink cycle pipe is crossed with quadruple effect circulating pump is connected, and the outlet of the quadruple effect circulating pump passes through quadruple effect uplink cycle pipe It is connected with the charging aperture of quadruple effect heater lower end, the discharging opening of the quadruple effect heater upper end and the quadruple effect crystallizer circulation port It is connected；The outlet of the triple effect magma outlet tube is connected with the quadruple effect downlink cycle pipe, the quadruple effect crystallizer steam drain with Quadruple effect crystallizer gland steam exhauster is connected；The quadruple effect on the outlet of the triple effect crystallizer gland steam exhauster and the quadruple effect heater shell side top Heater shell side air intake is connected, and the outlet of the triple effect condensate line is cold with the quadruple effect heater of the quadruple effect heater lower end Lime set entrance is connected, and the quadruple effect heater condensate outlet of the quadruple effect heater shell side bottom is connected with quadruple effect condensate line； The outlet of the triple effect crystallizer gland steam exhauster also enters vapour with the quadruple effect auxiliary heater on the quadruple effect auxiliary heater shell side top Mouth is connected, and the outlet of triple effect auxiliary condensate line and the quadruple effect auxiliary heater of the quadruple effect auxiliary heater lower end are condensed Liquid entrance is connected, and the quadruple effect auxiliary heater condensate outlet of the quadruple effect auxiliary heater shell side bottom is condensed with the quadruple effect Liquid pipe is connected；The outlet of the quadruple effect condensate line accesses the entrance of solvent tank, the bottom of the solvent tank and entering for solvent pump Mouth is connected, and the outlet of the solvent pump is connected with solvent outlet tube.
8. saliferous organic solution according to claim 7 evaporates recovery system, it is characterised in that：The quadruple effect downlink cycle The lower end of pipe is also connected with the entrance of quadruple effect magma pump, the outlet of the quadruple effect magma pump and the charging aperture phase of quadruple effect cyclone Even, the top exit of the quadruple effect cyclone is connected with the quadruple effect crystallizer refluxing opening by quadruple effect magma return duct, described The outlet at bottom of quadruple effect cyclone is connected with the entrance of the stiff tank；The entrance phase of the outlet of the mother liquor tank and mother solution pump Even, the outlet of the mother solution pump is noted with the quadruple effect crystallizer mother liquor in the middle part of the quadruple effect crystallizer circumferential wall by mother liquor reflux pipe Entrance is connected.
9. saliferous organic solution according to claim 8 evaporates recovery system, it is characterised in that：The quadruple effect crystallizer row The outlet of steam pipe is connected with the air inlet of surface condenser shell side upper end, condensed fluid row's mouth of the surface condenser shell side lower end It is connected with the entrance of the solvent tank by surface condenser return duct；The air vent and water of the surface condenser shell side lower end The pump orifice of ring vacuum pumps is connected, and the air vent of the water-ring vacuum pump is connected with vacuum pump discharges pipe, the liquid-ring type The machine water shutoff outlet of vacuum pump is connected with vacuum pump circulating water tank, the bottom of the vacuum pump circulating water tank and entering for water circulating pump Mouth is connected, and the outlet of the water circulating pump is connected with the machine water shutoff entrance of the water-ring vacuum pump.
10. the saliferous organic solution according to claim 7 or 8 or 9 evaporates recovery system, it is characterised in that：The stock solution Storage tank, the top of solvent tank and it is described two effect falling film evaporator, triple effect heater, triple effect auxiliary heater, quadruple effect heater and The shell side top and the bottom of quadruple effect auxiliary heater are respectively equipped with fixed gas air vent, each fixed gas air vent respectively with fixed gas Exhaust main is connected, and the outlet of the fixed gas exhaust main is connected with the air inlet of the surface condenser upper end；It is described cold Condensate water pot gland steam exhauster, the outlet of the condensate water pot gland steam exhauster and the effect falling film evaporator are connected with the top of solidifying water pot The air vent of shell side top and the bottom is connected or is connected with the fixed gas exhaust main with the 2nd effect evaporator air intake respectively.
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