CN206499889U - The methanol aqueous solution evaporation recovery system of sodium chloride - Google Patents

Abstract

The utility model is related to a kind of methanol aqueous solution evaporation recovery system of sodium chloride, including stoste storage tank and an effect falling film evaporator, stoste outlet is connected through feed pump with an effect feed liquid port of an effect falling film evaporator bottom, the one effect air intake on one effect falling film evaporator shell side top is connected with raw steam pipe, and an effect condensation-water drain of an effect falling film evaporator shell side bottom is connected by an effect condensate pipe with the entrance of condensate water pot；The feed separation mouthful of one effect falling film evaporator bottom is connected by communicating pipe with an effect separator, an effect separator steam drain at the top of one effect separator is connected with an effect separator gland steam exhauster, one effect separator material liquid outlet of one effect separator bottom is connected with an effect feed liquid down pipe, one effect feed liquid down pipe is connected through an effect circulating pump and an effect circulation pipe with the 1st effective evaporator circulation fluid entrance at the top of an effect falling film evaporator, and the outlet of an effect circulating pump is also associated with an effect feed liquid efferent duct.The common recovery of methanol and sodium chloride can be achieved in this, and energy consumption is low.

Description

The methanol aqueous solution evaporation recovery system of sodium chloride

Technical field

The utility model is related to a kind of methanol aqueous solution evaporation recovery system of sodium chloride, can be applied to the high chlorine of environmental protection industry (epi) Change the processing and the recovery of the industrial methanol of food pharmaceutical of the methanol aqueous solution of sodium, belong to Treatment of Industrial Water technical field.

Background technology

In environmental protection and pharmaceuticals industry, because of the diversity of chemical industry, solution component is increasingly sophisticated, and mostly high saliferous height has Machine thing, the mode of the methanol aqueous solution recovery methanol of sodium chloride generally uses rectification process, and after being separated through rectifying, methanol overflows, Sodium chloride is remained in tower reactor, it is necessary to carry out periodically row's raffinate to tower reactor.A part of methanol can be carried in raffinate secretly, caused damage, Reduce the rate of recovery of methanol；Sodium chloride is not recycled utilization simultaneously, adds the burden of subsequent treatment.In addition, tower reactor Rectifying need to give birth to quantity of steam greatly, high energy consumption.

Utility model content

The purpose of this utility model is that overcoming problems of the prior art, there is provided a kind of methanol-water of sodium chloride Solution evaporates recovery system, and the common recovery of organic solution and sodium chloride can be achieved, and energy consumption is low.

To solve above technical problem, a kind of methanol aqueous solution evaporation recovery system of sodium chloride of the present utility model, bag Stoste storage tank and an effect falling film evaporator are included, the outlet of the stoste storage tank is connected with the entrance of feed pump, the effect falling liquid film The bottom of evaporator is connected with an effect feed liquid down pipe, and the middle part of the effect feed liquid down pipe enters provided with 1st effective evaporator feed liquid Mouthful, the outlet of the feed pump is connected with an effect feed liquid down pipe of an effect falling film evaporator bottom, the effect falling film evaporation The 1st effective evaporator air intake on device shell side top is connected with raw steam pipe, and an effect of the effect falling film evaporator shell side bottom is steamed Hair device condensation-water drain is connected by an effect condensate pipe with the entrance of condensate water pot；The thing of the one effect falling film evaporator bottom Material separating opening is connected by communicating pipe with an effect separator, an effect separator steam drain and an effect at the top of the effect separator Separator gland steam exhauster is connected, an effect separator material liquid outlet of the effect separator bottom and described one effect feed liquid down pipe phase Even, the lower end of the effect feed liquid down pipe is connected with the entrance of an effect circulating pump, and the outlet of the effect circulating pump passes through one Effect circulation pipe is connected with the 1st effective evaporator circulation fluid entrance at the top of an effect falling film evaporator, and the outlet of the effect circulating pump is also It is connected with an effect feed liquid efferent duct.

Relative to prior art, the utility model achieves following beneficial effect：The methanol-water of sodium chloride after preheated Solution stoste enters the 1st effective evaporator feed liquid port of an effect falling film evaporator, is concentrated with an effect of an effect falling film evaporator bottom One effect concentrate of liquid and an effect separator bottom is common to flow downward along an effect feed liquid down pipe, and circulates pumping by an effect Go out, the 1st effective evaporator circulation fluid entrance at the top of an effect falling film evaporator is sent to through an effect circulation pipe；The 135 of raw steam pipe offer The shell side that DEG C raw steam enters an effect falling film evaporator from 1st effective evaporator air intake is circulated to the effect flowed down along falling liquid film tube wall Concentrate is heated, and 100 DEG C of an effect steam condensate (SC) is discharged into from 1st effective evaporator condensation-water drain and an effect condensate pipe Condensate water pot is reclaimed；An effect concentrate after heating is separated from an effect separator is entered communicating pipe, and 72 DEG C of an effect is steamed Vapour enters an effect separator gland steam exhauster from an effect separator steam drain, and the main component of an effect steam is methanol steam；After concentration One effect concentrate enter one effect circulation pump circulation, one effect circulating-pump outlet part one imitate concentrate from one effect feed liquid efferent duct Discharge.By the evaporation and concentration of an effect falling film evaporator, methanol largely evaporates, and the concentration of sodium chloride solution is improved, and is Follow-up further concentrating and separating provides condition.

Improved as of the present utility model, the utility model also includes two effect falling film evaporators, the two effects falling film evaporation The bottom of device is connected with two effect feed liquid down pipes, and the middle part of the two effects feed liquid down pipe is provided with 2nd effect evaporator feed liquid port, The 2nd effect evaporator feed liquid port is connected with the outlet of described one effect feed liquid efferent duct, and described one imitates going out for separator gland steam exhauster Mouth is connected with the 2nd effect evaporator air intakes on described two effect falling film evaporator shell side tops, under the two effects falling film evaporator shell side The 2nd effect evaporator condensate outlet in portion is connected with two effect condensate lines；The feed separation mouthful of the two effect falling film evaporators bottom It is connected by communicating pipe with two effect separators, two effect separator steam drains and two effect separator rows at the top of the two effects separator Steam pipe is connected, and two effect separator material liquid outlets of the two effects separator bottom are connected with described two effect feed liquid down pipes, described The lower end of two effect feed liquid down pipes is connected with the entrance of two effect circulating pumps, and the outlet of the two effects circulating pump passes through two effect circulation pipes It is connected with the 2nd effect evaporator circulation fluid entrance at the top of two effect falling film evaporators, the outlet of the two effects circulating pump is also associated with two Imitate feed liquid efferent duct.Sodium chloride content is 2~3%wt, and temperature is discharged for 73 DEG C of an effect concentrate from an effect feed liquid efferent duct Afterwards, it is common along two effect feed liquids with two effect concentrates of two effect falling film evaporator bottoms and two effect concentrates of two effect separator bottoms Down pipe is flowed downward, and circulates pumped by two effects, and two effects at the top of two effect falling film evaporators are sent to through two effect circulation pipes Evaporator circulation fluid entrance；It is mainly methanol steam in the 72 DEG C of one effect steam that one effect separator is produced, is also steamed containing part water Vapour, an effect steam enters two effect falling film evaporator shell sides after an effect separator gland steam exhauster discharge from 2nd effect evaporator air intake, The two effect circulation concentrates flowed down along falling liquid film tube wall are heated, 72 DEG C two imitates condensate liquid from 2nd effect evaporator condensate outlet And two effect condensate line discharge；After heating two effect concentrates from communicating pipe enter two effect separators in is separated, methanol with Moisture, which continues to evaporate, turns into two effect steam, and 66 DEG C of two effect steam enters two effect separator gland steam exhausters from two effect separator steam drains； Two effect concentrates after concentration enter two effect circulation pump circulations, and partial oxidation sodium content is 4~6%wt, and temperature is 68 DEG C of two effects Concentrate is discharged from two effect feed liquid efferent ducts.The effect steam that two effect falling film evaporators are produced using an effect separator is dense to an effect Contracting liquid is further concentrated, and has both been reclaimed the waste heat that an effect is produced, has further been evaporated methanol and improved sodium chloride The concentration of solution.

As further improvement of the utility model, the utility model also includes one-level preheater, the condensate water pot Outlet at bottom is connected with the entrance of condensate pump, and the outlet of the condensate pump is preheated by condensed water feed pipe and the one-level The one-level preheater water inlet of device is connected, and the one-level preheater delivery port of the one-level preheater is connected with condensing hot air furnace pipe, The one-level preheater feed liquid port of the one-level preheater is connected with the outlet of the feed pump, the one-level of the one-level preheater Preheater material liquid outlet is connected with the 1st effective evaporator feed liquid port.The methanol aqueous solution stoste of sodium chloride enters through stoste pipe Stoste storage tank, sodium chloride content is 1~1.5%wt, and temperature is 25 DEG C；98 DEG C of effect steam condensate (SC) quilt from condensate water pot Condensate pump is extracted out, and the tube side into one-level preheater is preheated to the methanol aqueous solution stoste of the sodium chloride of shell side, makes original The temperature of liquid is improved to 45 DEG C, and the effect steam condensate (SC) temperature after heat release is 40 DEG C, is entered by condensing hot air furnace pipe and condensed Water reclamation system, had both reclaimed the heat of condensed water, and the load of an effect falling film evaporator is reduced again, reduced raw steam consumption.

As further improvement of the utility model, the utility model also includes two grades of preheaters, the one-level preheater Material liquid outlet is connected with two grades of preheater feed liquid ports of two grades of preheaters, two grades of preheater material of two grades of preheaters Liquid outlet is connected with the 1st effective evaporator feed liquid port；Two grades of preheater air intakes of two grades of preheaters and the raw steaming Steam pipe is connected, and two grades of preheater condensed waters row's mouth of two grades of preheaters passes through high-temperature condensation water return duct and the condensed water The water inlet of tank is connected.The tube side that 135 DEG C of raw steam enter two grades of preheaters is carried out further to the stoste preheated by one-level Heating, makes the temperature of stoste continue to improve to 60 DEG C, 100 DEG C of high-temperature condensation waters after heat release are entered by high-temperature condensation water return duct Enter condensate water pot, then one-level preheater is sent to by condensate pump and carry out further heat release, stoste temperature after two-stage is preheated is big Amplitude is improved, and is greatly reduced the load of an effect falling film evaporator, is further reduced raw steam consumption.

As further improvement of the utility model, the utility model also includes triple effect crystallizer, the triple effect crystallizer Top be provided with the middle part of triple effect crystallizer steam drain, the circumferential wall of the triple effect crystallizer and be provided with triple effect crystallizer charging aperture, three Crystallizer circulation port and triple effect crystallizer refluxing opening are imitated, the bottom of the triple effect crystallizer is provided with triple effect crystallizer discharging opening, institute The outlet that triple effect crystallizer charging aperture is stated with described two effect feed liquid efferent ducts is connected；Connect below the triple effect crystallizer discharging opening Triple effect auxiliary heater is connected to, the discharging opening of the triple effect auxiliary heater lower end passes through triple effect downlink cycle pipe and triple effect cycle The entrance of pump is connected, and the outlet of the triple effect cycle pump passes through triple effect uplink cycle pipe and the charging aperture phase of triple effect heater lower end Even, the discharging opening of the triple effect heater upper end is connected with the triple effect crystallizer circulation port, the outlet of the triple effect cycle pump It is also associated with triple effect magma efferent duct；The triple effect crystallizer steam drain is connected with triple effect crystallizer gland steam exhauster；Two effect point Outlet from device gland steam exhauster is connected with the triple effect heater air intake on the triple effect heater shell side top, the two effects condensate liquid The outlet of pipe is connected with the triple effect condensate inlet of the triple effect heater shell side bottom, the triple effect heater shell side bottom Triple effect condensate outlet is connected with triple effect condensate line；The outlet of the two effects separator gland steam exhauster also adds with triple effect auxiliary The triple effect auxiliary heater air intake on hot device shell side top is connected, and the outlet of the two effects condensate line is also aided in the triple effect The triple effect auxiliary condensate inlet of heater shell side bottom is connected, and the triple effect auxiliary of the triple effect auxiliary heater shell side bottom is cold Condensate outlet is connected with triple effect auxiliary condensate line.Falling film evaporator has that heat transfer efficiency is high, required auxiliary power equipment power Small the advantages of, but be not suitable for having solid particle or have the solution evaporation of crystallization precipitation；The utility model will pass through double flash evaporation Two effect concentrates of concentration are from two effect feed liquid efferent ducts send into triple effect crystallizer through triple effect crystallizer charging aperture, triple effect crystallizer The magma of bottom is discharged from triple effect crystallizer discharging opening, is downwardly into the heating of triple effect auxiliary heater, and magma after heating is along three Imitate downlink cycle pipe and enter triple effect cycle pump, then under triple effect cycle pumping action, it is up and enter three along triple effect uplink cycle pipe Effect heater is further heated, and the magma after heating up again is from triple effect crystallizer circulation port enters triple effect crystallizer, water Divide and remaining methanol largely evaporates, sodium chloride is close to saturation and crystal growth in triple effect crystallizer, and triple effect crystallizer is produced 60 DEG C of triple effect steam from triple effect crystallizer steam drain discharge.The outlet of 66 DEG C of two effect steam from two effect separator gland steam exhausters divides Not Jin Ru triple effect heater shell side top triple effect heater air intake and triple effect auxiliary heater shell side top triple effect auxiliary Heater air intake, is heated using the heat of two effect steam to triple effect magma.66 DEG C two effect steam in methanol steam and Water vapour is condensed into 66 DEG C in triple effect heater triple effect condensate liquid after heat release is discharged into triple effect condensation from triple effect condensate outlet Liquid pipe, the two effect condensate liquids entered from triple effect condensate inlet are also discharged into triple effect condensate liquid after flashing heat release in triple effect heater Pipe；Methanol steam and water vapour in 66 DEG C of two effect steam are condensed into 66 DEG C in triple effect auxiliary heater triple effect after heat release is auxiliary Help condensate liquid to be discharged into triple effect auxiliary condensate line from triple effect auxiliary condensate outlet, the two of condensate inlet entrance are aided in from triple effect Effect condensate liquid is flashed in triple effect auxiliary heater is also discharged into triple effect auxiliary condensate line after heat release.It is dense in triple effect crystallizer 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 evaporates.The utility model first uses the concentration of two-stage falling film evaporator molten according to the characteristic of solution when influent concentration is relatively low Liquid, makes after the concentration raising to a certain extent of solution, enters back into triple effect crystallizer and be evaporated crystallization, had two kinds of evaporations concurrently The advantage of mode, has evaded shortcoming, reduces system dynamic plant capacity, reduces power consumption.

As further improvement of the utility model, the lower end of the triple effect downlink cycle pipe also enters with triple effect magma pump Mouth is connected, and the outlet of the triple effect magma pump is connected with the charging aperture of triple effect cyclone, the top exit of the triple effect cyclone It is connected by triple effect magma return duct with the triple effect crystallizer refluxing opening, outlet at bottom and the stiff tank of the triple effect cyclone Entrance be connected, the outlet at bottom of the stiff tank is connected with the upper feed inlet of centrifuge, the solid-phase outlet of the centrifuge It is connected with sodium chloride collection system；The liquid-phase outlet of the centrifuge and the stiff tank overfall on the stiff tank top respectively with The entrance of mother liquor tank is connected.The concentration of sodium chloride is up to 7~10%wt in triple effect magma, and temperature is 66 DEG C, triple effect downlink cycle pipe In part triple effect magma by triple effect magma pumped, into the charging aperture of triple effect cyclone, thickened through triple effect cyclone concentrate After separation, light phase is circulated by triple effect magma return duct into triple effect crystallizer refluxing opening, and heavy phase enters one into stiff tank The sodium chloride concentration after concentrate growing the grain, concentrate growing the grain is walked up to 30~50%wt, temperature is 55 DEG C, is separated subsequently into centrifuge, The moisture content of sodium chloride crystal is discharged less than 6%wt from the solid-phase outlet of centrifuge, and the mother liquor of centrifuge goes out from the liquid phase of centrifuge Mouth escapes and enter mother liquor tank collection, and the mother liquor of stiff tank top overflow also enters mother liquor tank from stiff tank overfall and collected, female Sodium chloride concentration in flow container is less than 30%wt, and temperature is 45 DEG C.

As further improvement of the utility model, the utility model also includes quadruple effect crystallizer, the quadruple effect crystallizer Top be provided with the middle part of quadruple effect crystallizer steam drain, the circumferential wall of the quadruple effect crystallizer and be provided with quadruple effect crystallizer circulation port and four Crystallizer refluxing opening is imitated, the bottom of the quadruple effect crystallizer is provided with quadruple effect crystallizer discharging opening；The quadruple effect crystallizer discharging opening Lower section be connected with quadruple effect auxiliary heater, the discharging opening of the quadruple effect auxiliary heater lower end by quadruple effect downlink cycle pipe with The entrance of quadruple effect circulating pump is connected, and the outlet of the quadruple effect circulating pump passes through quadruple effect uplink cycle pipe and quadruple effect heater lower end Charging aperture is connected, and the discharging opening of the quadruple effect heater upper end is connected with the quadruple effect crystallizer circulation port；The triple effect magma The outlet of efferent duct is connected with the quadruple effect downlink cycle pipe, the quadruple effect crystallizer steam drain and quadruple effect crystallizer gland steam exhauster phase Even；The quadruple effect heater shell side air intake phase of the outlet and the quadruple effect heater shell side top of the triple effect crystallizer gland steam exhauster Even, the outlet of the triple effect condensate line is connected with the quadruple effect heater condensate inlet of the quadruple effect heater lower end, described The quadruple effect heater condensate outlet of quadruple effect heater shell side bottom is connected with quadruple effect condensate line；The triple effect crystallizer steam discharge Quadruple effect auxiliary heater air intake of the outlet of pipe also with the quadruple effect auxiliary heater shell side top is connected, the triple effect auxiliary The outlet of condensate line is connected with the quadruple effect auxiliary heater condensate inlet of the quadruple effect auxiliary heater lower end, the quadruple effect The quadruple effect auxiliary heater condensate outlet of auxiliary heater shell side bottom is connected with the quadruple effect condensate line；The quadruple effect is cold The entrance of the outlet access solvent tank of condensate pipe, the bottom of the solvent tank is connected with the entrance of solvent pump, the solvent pump Outlet is connected with solvent efferent duct.The mother liquor that mother liquor tank is collected is sent into the quadruple effect of quadruple effect crystallizer by mother liquor pump through mother liquor reflux pipe In crystallizer charging aperture, the magma of quadruple effect crystalliser feet is discharged from quadruple effect crystallizer discharging opening, is downwardly into quadruple effect auxiliary and is added Hot device heating, the magma after heating enters quadruple effect circulating pump, the triple effect of triple effect magma efferent duct outflow along quadruple effect downlink cycle pipe Magma also enters quadruple effect circulating pump through quadruple effect downlink cycle pipe, up along quadruple effect uplink cycle pipe under quadruple effect circulation pumping action And further heated into quadruple effect heater, the magma after heating up again is crystallized from quadruple effect crystallizer circulation port into quadruple effect In device, moisture and remaining methanol largely evaporate, sodium chloride saturation and crystal growth in quadruple effect crystallizer, the production of quadruple effect crystallizer 51 DEG C of raw quadruple effect steam are discharged from quadruple effect crystallizer steam drain.The outlet of triple effect steam from triple effect crystallizer gland steam exhauster is entered respectively Enter the quadruple effect heater air intake on quadruple effect heater shell side top and the quadruple effect auxiliary heating on quadruple effect auxiliary heater shell side top Device air intake, is heated using the heat of triple effect steam to quadruple effect magma.Methanol steam and water in 60 DEG C of triple effect steam steam Vapour is condensed into 60 DEG C in quadruple effect heater quadruple effect condensate liquid after heat release is discharged into quadruple effect condensate liquid from quadruple effect condensate outlet Pipe, the triple effect condensate liquid entered from quadruple effect condensate inlet is also discharged into quadruple effect condensate liquid after flashing heat release in quadruple effect heater Pipe.Methanol steam and water vapour in 60 DEG C of triple effect steam are condensed into 60 DEG C in quadruple effect auxiliary heater quadruple effect after heat release is auxiliary Help condensate liquid to be discharged into quadruple effect auxiliary condensate line from quadruple effect auxiliary condensate outlet, the three of condensate inlet entrance are aided in from quadruple effect Effect auxiliary condensate liquid is also discharged into quadruple effect condensate line after flashing heat release in quadruple effect auxiliary heater.Methanol and condensed water are from quadruple effect Condensate line enters solvent tank, by solvent pumped, enters later process through solvent efferent duct, the first alcohol and water that solvent is pumped out Temperature is 45 DEG C, and methanol concentration improves 1% ~ 2%wt than rectifying, while the saliferous rate in methanol is less than 0.05%wt.

As further improvement of the utility model, the lower end of the quadruple effect downlink cycle pipe also enters with quadruple effect magma pump Mouth is connected, and the outlet of the quadruple effect magma pump is connected with the charging aperture of quadruple effect cyclone, the top exit of the quadruple effect cyclone Be connected by quadruple effect magma return duct with the quadruple effect crystallizer refluxing opening, the outlet at bottom of the quadruple effect cyclone with it is described thick The entrance of thick tank is connected；The outlet of the mother liquor tank is connected with the entrance of mother liquor pump, and the outlet of the mother liquor pump is returned by mother liquor Flow tube is connected with the quadruple effect crystallizer mother liquor inlet in the middle part of the quadruple effect crystallizer circumferential wall.Sodium chloride is dense in quadruple effect magma Degree up to 25~30%wt, temperature be part quadruple effect magma in 55 DEG C, quadruple effect downlink cycle pipe by quadruple effect magma pumped, enter Enter the charging aperture of quadruple effect cyclone, after the thickening separation of quadruple effect cyclone concentrate, light phase enters four by quadruple effect magma return duct Effect crystallizer refluxing opening is circulated, and heavy phase enters the further concentrate growing the grain of stiff tank, is separated subsequently into centrifuge, sodium chloride Crystal is discharged from the solid-phase outlet of centrifuge.The utility model can continuously isolate sodium chloride, continuously while methanol is reclaimed Property operation can reduce labour, improve production efficiency, sodium chloride and methanol respectively all is isolated by, realize zero-emission Put, realize the environmental benefit and resource recycling of maximum.The utility model uses multiple-effect evaporation technique, before latter effect utilization The indirect steam of one effect is as thermal source, and the condensate liquid steamed is used for the preheating of raw material, greatlys save energy consumption, reduces operation Cost.

It is used as further improvement of the utility model, outlet and the surface condenser shell side of the quadruple effect crystallizer gland steam exhauster The air inlet of upper end is connected, condensate liquid row's mouth of the surface condenser shell side lower end by surface condenser return duct with it is described The entrance of solvent tank is connected；The exhaust outlet of the surface condenser shell side lower end is connected with the pump orifice of water-ring vacuum pump, institute The exhaust outlet for stating water-ring vacuum pump is connected with vacuum pump discharges pipe, the machine water shutoff outlet of the water-ring vacuum pump and vavuum pump Circulate water pot to be connected, the bottom of the vacuum pump circulating water tank is connected with the entrance of water circulating pump, the outlet of the water circulating pump It is connected with the machine water shutoff entrance of the water-ring vacuum pump.The outlet of 51 DEG C of quadruple effect steam from quadruple effect crystallizer gland steam exhauster enters table The shell side of face condenser, the tube side of surface condenser is passed through cooling water and is condensed into the methanol steam and water vapour in quadruple effect steam Then 40 DEG C of quadruple effect condensate liquid, quadruple effect condensate liquid enters 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, can prevent methanol is dissolved in water ring true again The machine water shutoff of empty pump and cause damage.

As further improvement of the utility model, the stoste storage tank, the top of solvent tank and the two effects falling liquid film steam The shell side top and the bottom for sending out device, triple effect heater, triple effect auxiliary heater, quadruple effect heater and quadruple effect auxiliary heater are respectively equipped with Fixed gas exhaust outlet, each fixed gas exhaust outlet is connected with fixed gas exhaust main respectively, the fixed gas exhaust main Outlet 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, The exhaust outlet of the outlet of the condensate water pot gland steam exhauster and the effect falling film evaporator shell side top and the bottom is imitated with described two respectively Evaporator air intake is connected or is connected with the fixed gas exhaust main.Incoagulable gas is dissolved with solution, in evaporation not Solidifying property gas enters the shell side of each evaporator or heater together with the steam that evaporation is produced, because incoagulable gas can not be cold It is solidifying, if the heat and mass transfer of steam can be influenceed by accumulating in shell side, make the heat transfer deterioration of each evaporator or heater.This practicality is new Type extracts incoagulable gas everywhere by fixed gas exhaust main out, after being cooled down through surface condenser, by water-ring vacuum pump Extract out, improve the heat exchange efficiency of each evaporator or heater.When system just starts, one can be imitated above and below falling film evaporator shell side The exhaust outlet in portion is connected with fixed gas exhaust main, and condensate water pot gland steam exhauster is connected with fixed gas exhaust main, so as to as early as possible not Solidifying gas is extracted.It is cold because the fixed gas temperature of an effect falling film evaporator is up to 135 DEG C after system motion to stable state The fixed gas temperature of solidifying water pot contains a large amount of heat energy up to 98 DEG C, now cuts off one and imitates falling film evaporator exhaust outlet with not coagulating Valve between gas exhaust main, opens the valve between an effect falling film evaporator exhaust outlet and 2nd effect evaporator air intake；Cut Disconnected valve between condensate water pot gland steam exhauster and fixed gas exhaust main, opens cut-out condensate water pot gland steam exhauster and 2nd effect evaporator Valve between air intake, makes the one of high temperature to imitate fixed gas and the fixed gas of condensate water pot enters two effect falling film evaporator heat releases Afterwards, then from 2nd effect evaporator exhaust outlet extracted out through fixed gas exhaust main, so can both reclaim the heat in high temperature fixed gas, The load of surface condenser can be mitigated again.The fixed gas temperature that two effect falling film evaporator shell sides are extracted out is 72 DEG C, and solvent tank is taken out The fixed gas temperature gone out 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, four The fixed gas temperature for imitating heater and the extraction of quadruple effect auxiliary heater shell side is 60 DEG C, and what surface condenser exhaust outlet was discharged does not coagulate Temperature degree is 51 DEG C.

Brief description of the drawings

The utility model is described in further detail with reference to the accompanying drawings and detailed description, accompanying drawing only provides ginseng Examine and used with explanation, be not used to limit the utility model.

Fig. 1 evaporates the embodiment one of recovery system for the methanol aqueous solution of the utility model sodium chloride.

Fig. 2 evaporates the embodiment two of recovery system for the methanol aqueous solution of the utility model sodium chloride.

Fig. 3 evaporates the embodiment three of recovery system for the methanol aqueous solution of the utility model sodium chloride.

In figure：1. an effect falling film evaporator；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 exhaust outlets；1g. mono- Imitate circulation pipe；1h. mono- imitates feed liquid efferent duct；2. an effect separator；2a. mono- imitates separator steam drain；2b. mono- imitates separator feed liquid Outlet；2c. mono- imitates separator gland steam exhauster；3. two effect falling film evaporators；3a. 2nd effect evaporator feed liquid ports；Under the effect feed liquids of 3b. bis- Row pipe；3c. bis- imitates circulating pump；3d. 2nd effect evaporator circulation fluid entrances；3e. 2nd effect evaporator air intakes；3f. 2nd effect evaporators Exhaust outlet；3g. bis- imitates circulation pipe；3h. bis- imitates feed liquid efferent duct；4. two effect separators；4a. bis- imitates separator steam drain；4b. bis- Imitate separator material liquid outlet；4c. bis- imitates separator gland steam exhauster；5. triple effect crystallizer；5a. triple effect crystallizer charging apertures；5b. triple effects Crystallizer steam drain；5c. triple effect crystallizer circulation ports；5d. triple effect crystallizer refluxing openings；5e. triple effect crystallizer discharging openings；5f. Triple effect downlink cycle pipe；5g. triple effect cycle pumps；5h. triple effect uplink cycle pipes；5j. triple effect crystallizer gland steam exhausters；6. triple effect is heated Device；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 aid in condensate inlet；8. quadruple effect knot Brilliant device；8a. quadruple effect crystallizer mother liquor inlets；8b. quadruple effect crystallizer steam drains；8c. quadruple effect crystallizer circulation ports；8d. quadruple effects Crystallizer refluxing opening；8e. quadruple effect crystallizer discharging openings；8f. quadruple effect downlink cycle pipes；8g. quadruple effect circulating pumps；8h. quadruple effects are up Circulation pipe；8j. quadruple effect crystallizer gland steam exhauster；9. quadruple effect heater；9a. quadruple effect heater air intakes；9b. quadruple effects heater is condensed Liquid is exported；9c. quadruple effect heater condensate inlets；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 tank；11a. stiffs Tank overfall；12. centrifuge；12a. centrifuge liquid-phase outlets；12b. centrifuge solid-phase outlets；T1. stoste storage tank；T2. condense 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 liquor pump；B7. water-ring vacuum pump；B8. water circulating pump；G1. stoste pipe； G2. steam pipe is given birth to；G3. condensed water feed pipe；G4. condensing hot air furnace pipe；G5. high-temperature condensation water return duct；G6. one condensed water is imitated Pipe；G7. two condensate line is imitated；G8. triple effect magma efferent duct；G9. triple effect condensate line；G10. triple effect aids in condensate line； G11. triple effect magma return duct；G12. quadruple effect condensate line；G13. quadruple effect magma return duct；G14. mother liquor reflux pipe；G15. it is molten Agent efferent duct；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.

Embodiment

As shown in figure 1, sodium chloride of the present utility model methanol aqueous solution evaporation recovery system include stoste storage tank T1 and One effect falling film evaporator 1, stoste storage tank T1 outlet is connected with feed pump B1 entrance, and the bottom of an effect falling film evaporator 1 connects An effect feed liquid down pipe 1b is connected to, the middle part of an effect feed liquid down pipe 1b is provided with 1st effective evaporator feed liquid port 1a, feed pump B1 Outlet be connected with an effect feed liquid down pipe 1b of effect falling film evaporator 1 bottom, one imitates the one of falling film evaporator shell side top Effect evaporator air intake 1e is connected with raw steam pipe G2, the 1st effective evaporator condensation-water drain of an effect falling film evaporator shell side bottom It is connected by an effect condensate pipe G6 with condensate water pot T2 entrance；The feed separation mouthful of one effect falling film evaporator 1 bottom passes through Communicating pipe is connected with an effect separator 2, an effect separator steam drain 2a at the top of an effect separator 2 and an effect separator gland steam exhauster 2c is connected, and an effect separator material liquid outlet 2b of effect separator 2 bottom is connected with an effect feed liquid down pipe 1b, under an effect feed liquid Row pipe 1b lower end is connected with the entrance of an effect circulating pump 1c, and the outlet of an effect circulating pump 1c passes through an effect circulation pipe 1g and an effect The 1st effective evaporator circulation fluid entrance 1d at the top of falling film evaporator 1 is connected, and the outlet of an effect circulating pump 1c is also associated with an effect material Liquid efferent duct 1h.

The methanol aqueous solution stoste of sodium chloride enters stoste storage tank T1 through stoste pipe G1, and sodium chloride content is 1~1.5%wt, Temperature be 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 enter Mouth 1a, with an effect concentrate of effect falling film evaporator 1 bottom and an effect concentrate of effect separator 2 bottom jointly along an effect Feed liquid down pipe 1b is flowed downward, and is extracted out by an effect circulating pump 1c, and an effect falling film evaporator 1 is sent to through an effect circulation pipe 1g The 1st effective evaporator circulation fluid entrance 1d at top；135 DEG C of raw steam that raw steam pipe G2 is provided are from 1st effective evaporator air intake 1e Shell side into an effect falling film evaporator 1 is heated to the effect circulation concentrate flowed down along falling liquid film tube wall, 100 DEG C of an effect Steam condensate (SC) is discharged into condensate water pot T2 and reclaimed from 1st effective evaporator condensation-water drain and an effect condensate pipe G6；One after heating Effect concentrate is imitated from communicating pipe into one and separated in separator 2, and 72 DEG C of an effect steam imitates separator steam drain 2a from one Into an effect separator gland steam exhauster 2c, the main component of an effect steam is methanol steam；An effect concentrate after concentration enters one Circulating pump 1c circulations are imitated, concentrate is imitated from an effect feed liquid efferent duct 1h discharges in the part one of an effect circulating pump 1c outlets.By one The evaporation and concentration of falling film evaporator 1 is imitated, methanol largely evaporates, and the concentration of sodium chloride solution is improved, be follow-up further Concentrating and separating provides condition.

The methanol aqueous solution evaporation recovery system of sodium chloride of the present utility model also includes two effect falling film evaporators 3, two effects The bottom of falling film evaporator 3 is connected with two effect feed liquid down pipe 3b, and two effect feed liquid down pipe 3b middle part is provided with 2nd effect evaporator Feed liquid port 3a, 2nd effect evaporator feed liquid port 3a are connected with the outlet of an effect feed liquid efferent duct 1h, an effect separator gland steam exhauster 2c outlet is connected with the 2nd effect evaporator air intake 3e on two effect falling film evaporator 3 shell side tops, two effect falling film evaporator shell sides The 2nd effect evaporator condensate outlet of bottom is connected with two effect condensate line G7；The feed separation of two effect falling film evaporator 3 bottoms Mouth is connected by communicating pipe with two effect separators 4, and the two effect separator steam drain 4a and two at the top of two effect separators 4 imitate separators Gland steam exhauster 4c is connected, and two effect separator material liquid outlet 4b of two effect separator 4 bottoms are connected with two effect feed liquid down pipe 3b, two effects Feed liquid down pipe 3b lower end is connected with two effect circulating pump 3c entrance, and two effect circulating pump 3c outlet passes through two effect circulation pipe 3g It is connected with the 2nd effect evaporator circulation fluid entrance 3d at the top of two effect falling film evaporator 3, two effect circulating pump 3c outlet is also associated with Two effect feed liquid efferent duct 3h.

Sodium chloride content is 2~3%wt, and temperature is imitated after feed liquid efferent duct 1h discharges for 73 DEG C of an effect concentrate from one, with Two effect concentrates of two effect falling film evaporator 3 bottoms and two effect concentrates of two effect separator 4 bottoms are common along under two effect feed liquids Row pipe 3b is flowed downward, and is extracted out by two effect circulating pump 3c, and the top of two effect falling film evaporator 3 is sent to through two effect circulation pipe 3g 2nd effect evaporator circulation fluid entrance 3d；It is mainly methanol steam in the effect steam that one effect separator 2 is produced, also containing part water Steam, an effect steam enters two effect falling film evaporations after an effect separator gland steam exhauster 2c discharges from 2nd effect evaporator air intake 3e The two effect circulation concentrates flowed down along falling liquid film tube wall are heated, 72 DEG C of two effect condensate liquid is cold from 2nd effect evaporator by device shell side Condensate outlet and two effect condensate line G7 discharges；Two effect concentrates after heating imitate progress in separators 4 from entering two communicating pipe Separation, methanol and moisture, which continue to evaporate, turns into two effect steam, and 66 DEG C of two effect steam enters two effects from two effect separator steam drain 4a Separator gland steam exhauster 4c；Two effect concentrates after concentration enter two effect circulating pump 3c circulations, and partial oxidation sodium content is 4~6% Wt, temperature is discharged for 68 DEG C of two effect concentrates from two effect feed liquid efferent duct 3h.Two effect falling film evaporators 3 imitate separator using one The 2 effect steam produced are further concentrated to an effect concentrate, have both been reclaimed the waste heat that an effect is produced, have further been evaporated Methanol and the concentration for improving sodium chloride solution.

As shown in Fig. 2 the methanol aqueous solution evaporation recovery system of sodium chloride of the present utility model also includes one-level preheater H1, condensate water pot T2 outlet at bottom are connected with condensate pump B2 entrance, and condensate pump B2 outlet is supplied water by condensed water Pipe G3 is connected with one-level preheater H1 one-level preheater water inlet, one-level preheater H1 one-level preheater delivery port and condensation Water Sproading pipe G4 is connected, and one-level preheater H1 one-level preheater feed liquid port is connected with feed pump B1 outlet, one-level preheating Device H1 one-level preheater 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 methanol aqueous solution stoste of the sodium chloride of shell side, the temperature of stoste is improved to 45 DEG C, one after heat release It is 40 DEG C to imitate steam condensate (SC) temperature, enters condensation water recovery system by condensing hot air furnace pipe G4, has both reclaimed condensed water Heat, reduces the load of an effect falling film evaporator 1 again, reduces raw steam consumption.

As shown in figure 3, the methanol aqueous solution evaporation recovery system of sodium chloride of the present utility model also includes two grades of preheaters H2, one-level preheater material liquid outlet is connected with two grades of preheater H2 two grades of preheater feed liquid ports, and the two of two grades of preheater H2 Level preheater material liquid outlet is connected with 1st effective evaporator feed liquid port 1a；Two grades of preheater H2 two grades of preheater air intakes and life Steam pipe G2 is connected, and two grades of preheater H2 two grades of preheater condensed waters row's mouth passes through high-temperature condensation water return duct G5 and condensed water Tank T2 water inlet is connected.

The tube side that 135 DEG C of raw steam enter two grades of preheater H2 is further heated to the stoste preheated by one-level, The temperature of stoste is set to continue to improve to 60 DEG C, 100 DEG C of high-temperature condensation waters after heat release are entered by high-temperature condensation water return duct G5 Condensate water pot T2, then the further heat release of one-level preheater H1 progress is sent to by condensate pump B2, stoste is warm after two-stage is preheated Degree is increased substantially, and is greatly reduced the load of an effect falling film evaporator 1, is further reduced raw steam consumption.

The methanol aqueous solution evaporation recovery system of sodium chloride of the present utility model also includes triple effect crystallizer 5, triple effect crystallization The top of device 5 is provided with the middle part of triple effect crystallizer steam drain 5b, the circumferential wall of triple effect crystallizer 5 and is 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 discharge provided with triple effect crystallizer Mouth 5e, triple effect crystallizer charging aperture 5a are connected with two effect feed liquid efferent duct 3h outlets；Triple effect crystallizer discharging opening 5e lower section Triple effect auxiliary heater 7 is connected with, the discharging opening of the lower end of triple effect auxiliary heater 7 is followed by triple effect downlink cycle pipe 5f with triple effect Ring pump 5g entrance is connected, and triple effect cycle pump 5g outlet is entered by triple effect uplink cycle pipe 5h and the lower end of triple effect heater 6 Material mouth is connected, and the discharging opening of the upper end of triple effect heater 6 is connected with triple effect crystallizer circulation port 5c, and triple effect cycle pump 5g outlet is also It is connected with triple effect magma efferent duct G8；Triple effect crystallizer steam drain 5b is connected with triple effect crystallizer gland steam exhauster 5j.

The triple effect heater air intake 6a phases of two effect separator gland steam exhauster 4c outlet and the shell side top of triple effect heater 6 Even, two effect condensate line G7 outlet is connected with the triple effect condensate inlet 6c of the shell side bottom of triple effect heater 6, 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 the shell side top of triple effect auxiliary heater 7 is connected, two effect condensate line G7 outlet also with The triple effect auxiliary condensate inlet 7c of the shell side bottom of triple effect auxiliary heater 7 is connected, and the three of the shell side bottom of triple effect auxiliary heater 7 Effect auxiliary condensate outlet 7b is connected with triple effect auxiliary condensate line G10.

The utility model crystallizes the two effect concentrates concentrated by double flash evaporation from two effect feed liquid efferent duct 3h through triple effect In device charging aperture 5a feeding triple effects crystallizer 5, the magma of the bottom of triple effect crystallizer 5 is discharged from triple effect crystallizer discharging opening 5e, to Lower entrance triple effect auxiliary heater 7 is heated, the magma after heating along triple effect downlink cycle pipe 5f enter triple effect cycle pump 5g, then It is up and enter triple effect heater 6 and further heated along triple effect uplink cycle pipe 5h under triple effect cycle pump 5g effects, again Magma after heating enters in triple effect crystallizer 5 from triple effect crystallizer circulation port 5c, and moisture and remaining methanol largely evaporate, chlorine Change sodium in triple effect crystallizer 5 close to saturation and crystal growth, 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 from two effect separator gland steam exhauster 4c outlet respectively enter the shell of triple effect heater 6 The triple effect heater air intake 6a on the journey top and triple effect auxiliary heater air intake 7a on the shell side top of triple effect auxiliary heater 7, Triple effect magma is heated using the heat of two effect steam.

Methanol steam and water vapour in 66 DEG C of two effect steam are condensed into 66 DEG C of triple effect in triple effect heater 6 after heat release Condensate liquid is discharged into triple effect condensate line G9 from triple effect condensate outlet 6b, the two effect condensate liquids entered from triple effect condensate inlet 6c Triple effect condensate line G9 is also discharged into after flashing heat release in triple effect heater 6；

Methanol steam and water vapour in 66 DEG C of two effect steam are condensed into 66 DEG C in triple effect auxiliary heater 7 after heat release Triple effect aids in condensate liquid to be discharged into triple effect auxiliary condensate line G10 from triple effect auxiliary condensate outlet 7b, and condensate liquid is aided in from triple effect The two effect condensate liquids that entrance 7c enters are flashed in triple effect auxiliary heater 7 is also discharged into triple effect auxiliary condensate line G10 after heat release.

Entrance of the triple effect downlink cycle pipe 5f lower end also with triple effect magma pump B3 is connected, triple effect magma pump B3 outlet with Triple effect cyclone S1 charging aperture is connected, and triple effect cyclone S1 top exit passes through triple effect magma return duct G11 and triple effect knot Brilliant device refluxing opening 5d is connected, and triple effect cyclone S1 outlet at bottom 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 the centrifuge solid-phase outlet 12b of centrifuge 12 is connected with sodium chloride collection system； The centrifuge liquid-phase outlet 12a of centrifuge 12 and the stiff tank overfall 11a on the top of stiff tank 11 enter with mother liquor tank T3 respectively Mouth is connected.

The concentration of sodium chloride is up to 7~10%wt in triple effect magma, and temperature is the portion in 66 DEG C, triple effect downlink cycle pipe 5f Divide triple effect magma to be extracted out by triple effect magma pump B3, into triple effect cyclone S1 charging aperture, thickened through triple effect cyclone S1 concentrates After separation, light phase is circulated by triple effect magma return duct G11 into triple effect crystallizer refluxing opening 5d, and heavy phase enters stiff tank Sodium chloride concentration after 11 further concentrate growing the grains, concentrate growing the grain is up to 30~50%wt, and temperature is 55 DEG C, subsequently into centrifugation Machine 12 is separated, and the moisture content of sodium chloride crystal is discharged less than 6%wt from the centrifuge solid-phase outlet 12b of centrifuge 12, centrifuge Mother liquor escapes and enter mother liquor tank T3 from the centrifuge liquid-phase outlet 12a of centrifuge 12 and collected, the mother of the top overflow of stiff tank 11 Liquid also enters mother liquor tank T3 from stiff tank overfall 11a and collected, and the sodium chloride concentration in mother liquor tank T3 is less than 30%wt, and temperature is 45℃。

The methanol aqueous solution evaporation recovery system of sodium chloride of the present utility model also includes quadruple effect crystallizer 8, quadruple effect crystallization The top of device 8 is provided with the middle part of quadruple effect crystallizer steam drain 8b, the circumferential wall of quadruple effect crystallizer 8 and is provided with quadruple effect crystallizer circulation port 8c With quadruple effect crystallizer refluxing opening 8d, the bottom of quadruple effect crystallizer 8 is provided with quadruple effect crystallizer discharging opening 8e；Quadruple effect crystallizer discharging opening Quadruple effect auxiliary heater 10 is connected with below 8e, the discharging opening of the lower end of quadruple effect auxiliary heater 10 passes through quadruple effect downlink cycle pipe 8f is connected with quadruple effect circulating pump 8g entrance, and quadruple effect circulating pump 8g outlet passes through quadruple effect uplink cycle pipe 8h and quadruple effect heater The charging aperture of 9 lower ends is connected, and the discharging opening of the upper end of quadruple effect heater 9 is connected with quadruple effect crystallizer circulation port 8c；Triple effect magma is defeated Outlet pipe G8 outlet is connected with quadruple effect downlink cycle pipe 8f, quadruple effect crystallizer steam drain 8b and quadruple effect crystallizer gland steam exhauster 8j phases Even.

The quadruple effect heater shell side air intake phase of triple effect crystallizer gland steam exhauster 5j outlet and the shell side top of quadruple effect heater 9 Even, triple effect condensate line G9 outlet is connected with the quadruple effect heater condensate inlet 9c of the lower end of quadruple effect heater 9, quadruple effect heating The quadruple effect heater condensate outlet 9b of the shell side bottom of device 9 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 the shell side top of quadruple effect auxiliary heater 10, triple effect auxiliary condensate liquid Pipe G10 outlet is connected with the quadruple effect auxiliary heater condensate inlet 10c of the lower end of quadruple effect auxiliary heater 10, 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 G12 outlet access solvent tank T4 entrance, solvent tank T4 bottom is connected with solvent pump B5 entrance, solvent pump B5 outlet It is connected with solvent efferent duct G15.

The mother liquor that mother liquor tank T3 is collected is crystallized by mother liquor pump B6 through the mother liquor reflux pipe G14 quadruple effects for sending into quadruple effect crystallizer 8 In device charging aperture, the magma of the bottom of quadruple effect crystallizer 8 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, triple effect magma efferent duct G8 outflows along quadruple effect downlink cycle pipe 8f Triple effect magma also through quadruple effect downlink cycle pipe 8f enter quadruple effect circulating pump 8g, quadruple effect circulating pump 8g effect under, along 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 enters in quadruple effect crystallizer 8, and moisture and remaining methanol largely evaporate, and saturation is simultaneously in quadruple effect crystallizer 8 for sodium chloride Crystal growth, 51 DEG C of quadruple effect steam that quadruple effect crystallizer 8 is produced are discharged from quadruple effect crystallizer steam drain 8b.Triple effect steam is from triple effect Crystallizer gland steam exhauster 5j outlet respectively enters the quadruple effect heater air intake 9a and quadruple effect auxiliary on the shell side top of quadruple effect heater 9 The quadruple effect auxiliary heater air intake 10a on the shell side top of heater 10, is added using the heat of triple effect steam to quadruple effect magma Heat.

Methanol steam and water vapour in 60 DEG C of triple effect steam are condensed into the four of 60 DEG C in quadruple effect heater 9 after heat release Effect condensate liquid is discharged into quadruple effect condensate line G12 from quadruple effect condensate outlet, the triple effect condensate liquid entered from quadruple effect condensate inlet Quadruple effect condensate line G12 is also discharged into after flashing heat release in quadruple effect heater 9.

Methanol steam and water vapour in 60 DEG C of triple effect steam are condensed into 60 DEG C in quadruple effect auxiliary heater 10 after heat release Quadruple effect aid in condensate liquid from quadruple effect auxiliary condensate outlet be discharged into quadruple effect auxiliary condensate line, from quadruple effect aid in condensate inlet The triple effect auxiliary condensate liquid of entrance is flashed in quadruple effect auxiliary heater 10 is also discharged into quadruple effect condensate line G12 after heat release.

Methanol and condensed water enter solvent tank T4 from quadruple effect condensate line G12, are extracted out by solvent pump B5, through solvent efferent duct G15 enters later process, and the temperature for the first alcohol and water that solvent pump B5 is sent out is 45 DEG C, and methanol concentration improves 1% ~ 2%wt than rectifying, The saliferous rate in methanol is less than 0.05%wt simultaneously.

Entrance of the quadruple effect downlink cycle pipe 8f lower end also with quadruple effect magma pump B4 is connected, quadruple effect magma pump B4 outlet with Quadruple effect cyclone S2 charging aperture is connected, and quadruple effect cyclone S2 top exit passes through quadruple effect magma return duct G13 and quadruple effect knot Brilliant device refluxing opening 8d is connected, and quadruple effect cyclone S2 outlet at bottom is connected with the entrance of stiff tank 11；Mother liquor tank T3 outlet with Mother liquor pump B6 entrance is connected, and mother liquor pump B6 outlet passes through mother liquor reflux pipe G14 and four in the middle part of the circumferential wall of quadruple effect crystallizer 8 Crystallizer mother liquor inlet 8a is imitated to be connected.

The concentration of sodium chloride is up to 25~30%wt in quadruple effect magma, and temperature is the portion in 55 DEG C, quadruple effect downlink cycle pipe 8f Divide quadruple effect magma to be extracted out by quadruple effect magma pump B4, into quadruple effect cyclone S2 charging aperture, thickened through quadruple effect cyclone S2 concentrates After separation, light phase is circulated by quadruple effect magma return duct G13 into quadruple effect crystallizer refluxing opening 8d, and heavy phase enters stiff tank 11 further concentrate growing the grains, are separated subsequently into centrifuge 12, and sodium chloride crystal is discharged from the solid-phase outlet of centrifuge 12.This reality Sodium chloride can be continuously isolated while methanol is reclaimed with new, makes sodium chloride and methanol respectively all are isolated by coming, it is real Existing zero-emission.It is latter to imitate the indirect steam by the use of previous effect as thermal source, and the condensate liquid steamed is used for the preheating of raw material, significantly Energy consumption has been saved, operating cost is reduced.

Quadruple effect crystallizer gland steam exhauster 8j outlet is connected with the air inlet of surface condenser H3 shell sides upper end, surface condenser Condensate liquid row's mouth of H3 shell sides lower end is connected by surface condenser return duct with solvent tank T4 entrance；Surface condenser H3 shells The exhaust outlet of journey lower end is connected with water-ring vacuum pump B7 pump orifice, water-ring vacuum pump B7 exhaust outlet and vacuum pump discharges Pipe G17 is connected, and water-ring vacuum pump B7 machine water shutoff outlet is connected with vacuum pump circulating water tank T5, vacuum pump circulating water tank T5's Bottom is connected with water circulating pump B8 entrance, and water circulating pump B8 outlet is connected with water-ring vacuum pump B7 machine water shutoff entrance.

51 DEG C of quadruple effect steam enter surface condenser H3 shell side, surface condensation from quadruple effect crystallizer gland steam exhauster 8j outlet Device H3 tube side is passed through the quadruple effect condensate liquid that the methanol steam and water vapour in quadruple effect steam are condensed into 40 DEG C by cooling water, quadruple effect Then condensate liquid enters solvent tank T4 by surface condenser return duct, and the fixed gas of surface condenser H3 shell sides is true by liquid-ring type Empty pump B7 is extracted out, and water-ring vacuum pump B7 machine water shutoff enters vacuum pump circulating water tank T5, and liquid-ring type is sent back to by water circulating pump B8 Vavuum pump B7, realizes the closed cycle of machine water shutoff, has both reduced the consumption of water, again methanol can be prevented to be dissolved in the machine of water ring vacuum pump Water shutoff and cause damage.

Stoste storage tank T1, solvent tank T4 top 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 exhaust outlet, each fixed gas exhaust Mouth is connected with fixed gas exhaust main G16 respectively, fixed gas exhaust main G16 outlet 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 exhaust outlet of hair device shell side top and the bottom is connected with 2nd effect evaporator air intake 3e or is connected with fixed gas exhaust main G16 respectively.

The utility model extracts incoagulable gas everywhere by fixed gas exhaust main G16 out, through surface condenser H3 After cooling, extracted out by water-ring vacuum pump B7, improve the heat exchange efficiency of each evaporator or heater., can be with when system just starts The exhaust outlet of one 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 not Solidifying gas exhaust main G16 is connected, so that fixed gas is extracted as early as possible.

After system motion to stable state, because the fixed gas temperature of an effect falling film evaporator 1 is up to 135 DEG C, condensation Water pot T2 fixed gas temperature contains a large amount of heat energy up to 98 DEG C, now cuts off a 1st effective evaporator for imitating falling film evaporator 1 Valve between exhaust outlet 1f and fixed gas exhaust main G16, opens 1st effective evaporator exhaust outlet 1f and enters vapour with 2nd effect evaporator Valve between mouth 3e；The valve between condensate water pot gland steam exhauster and fixed gas exhaust main G16 is cut off, cut-out condensed water is opened Valve between tank gland steam exhauster and 2nd effect evaporator air intake 3e, makes the one of high temperature to imitate fixed gas and condensate water pot T2 fixed gas Extracted out into after the two effect heat releases of falling film evaporator 3, then from 2nd effect evaporator exhaust outlet 3f through fixed gas exhaust main G16, so Both the heat in high temperature fixed gas can be reclaimed, surface condenser H3 load can be mitigated again.

The fixed gas temperature that two effect falling film evaporator 3 shell sides 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 the shell side of triple effect auxiliary heater 7 are extracted out is 66 DEG C, quadruple effect heater 9 and quadruple effect The fixed gas temperature that the shell side of auxiliary heater 10 is extracted out is 60 DEG C, and the fixed gas temperature of surface condenser exhaust outlet discharge is 51 ℃。

It the foregoing is only the preferable possible embodiments of the utility model, non-therefore limitation patent of the present utility model Protection domain.In addition to the implementation, the utility model can also have other embodiment, all use equivalent substitutions or equivalent change The technical scheme to be formed is changed, in the protection domain for all falling within the utility model requirement.Technology of the utility model without description is special Levying can realize by or using prior art, will not be repeated here.

Claims (10)

1. a kind of methanol aqueous solution evaporation recovery system of sodium chloride, including stoste storage tank, the outlet of the stoste storage tank is with entering Expect that the entrance of pump is connected, it is characterised in that：Also include an effect falling film evaporator, the bottom of the effect falling film evaporator is connected with One effect feed liquid down pipe, the middle part of the effect feed liquid down pipe is provided with 1st effective evaporator feed liquid port, and the feed pump goes out Mouth is connected with an effect feed liquid down pipe of an effect falling film evaporator bottom, an effect steaming on the effect falling film evaporator shell side top Hair device air intake is connected with raw steam pipe, and the 1st effective evaporator condensation-water drain of the effect falling film evaporator shell side bottom passes through One effect condensate pipe is connected with the entrance of condensate water pot；The feed separation mouthful of the one effect falling film evaporator bottom passes through communicating pipe It is connected with an effect separator, the effect separator steam drain at the top of the effect separator is connected with an effect separator gland steam exhauster, One effect separator material liquid outlet of the one effect separator bottom is connected with described one effect feed liquid down pipe, under the effect feed liquid The lower end of row pipe is connected with the entrance of an effect circulating pump, and the outlet of the effect circulating pump passes through an effect circulation pipe and an effect falling liquid film 1st effective evaporator circulation fluid entrance at the top of evaporator is connected, and the outlet of the effect circulating pump is also associated with effect feed liquid output Pipe.

2. the methanol aqueous solution evaporation recovery system of sodium chloride according to claim 1, it is characterised in that：Also include two effects Falling film evaporator, the bottom of the two effects falling film evaporator is connected with two effect feed liquid down pipes, the two effects feed liquid down pipe Middle part is provided with 2nd effect evaporator feed liquid port, the outlet phase of the 2nd effect evaporator feed liquid port and described one effect feed liquid efferent duct Even, the 2nd effect evaporator air intake phase of the outlet of the effect separator gland steam exhauster and described two effect falling film evaporator shell side tops Even, the 2nd effect evaporator condensate outlet of the two effect falling film evaporator shell sides bottom is connected with two effect condensate lines；Described two The feed separation mouthful of effect falling film evaporator bottom is connected by communicating pipe with two effect separators, and two at the top of the two effects separator Effect separator steam drain with two effect separator gland steam exhausters be connected, it is described two effect separator bottom two imitate separator material liquid outlets and The two effect feed liquids 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, and described two The outlet of effect circulating pump is connected by two effect circulation pipes with the 2nd effect evaporator circulation fluid entrance at the top of two effect falling film evaporators, institute The outlet for stating two effect circulating pumps is also associated with two effect feed liquid efferent ducts.

3. the methanol aqueous solution evaporation recovery system of sodium chloride according to claim 1, it is characterised in that：Also include one-level Preheater, the outlet at bottom of the condensate water pot is connected with the entrance of condensate pump, and the outlet of the condensate pump passes through condensation Water feed pipe is connected with the one-level preheater water inlet of the one-level preheater, the one-level preheater water outlet of the one-level preheater Mouth is connected with condensing hot air furnace pipe, the one-level preheater feed liquid port of the one-level preheater and the outlet phase of the feed pump Even, the one-level preheater material liquid outlet of the one-level preheater is connected with the 1st effective evaporator feed liquid port.

4. the methanol aqueous solution evaporation recovery system of sodium chloride according to claim 3, it is characterised in that：Also include two grades Preheater, the one-level preheater material liquid outlet is connected with two grades of preheater feed liquid ports of two grades of preheaters, and described two Two grades of preheater material liquid outlets of level preheater are connected with the 1st effective evaporator feed liquid port；Two grades of two grades of preheaters Preheater air intake is connected with the raw steam pipe, and two grades of preheater condensed waters row's mouth of two grades of preheaters is cold by high temperature Solidifying water return duct is connected with the water inlet of the condensate water pot.

5. the methanol aqueous solution evaporation recovery system of sodium chloride according to claim 2, it is characterised in that：Also include triple effect Crystallizer, the top of the triple effect crystallizer, which is provided with the middle part of triple effect crystallizer steam drain, the circumferential wall of the triple effect crystallizer, to be set There are triple effect crystallizer charging aperture, triple effect crystallizer circulation port and triple effect crystallizer refluxing opening, the bottom of the triple effect crystallizer is set There is triple effect crystallizer discharging opening, the triple effect crystallizer charging aperture is connected with the outlet of described two effect feed liquid efferent ducts；Described three Triple effect auxiliary heater is connected with below effect crystallizer discharging opening, the discharging opening of the triple effect auxiliary heater lower end passes through three Effect downlink cycle pipe is connected with the entrance of triple effect cycle pump, and the outlet of the triple effect cycle pump passes through triple effect uplink cycle Guan Yusan The charging aperture for imitating heater lower end is connected, the discharging opening of the triple effect heater upper end and the triple effect crystallizer circulation port phase Even, the outlet of the triple effect cycle pump is also associated with triple effect magma efferent duct；The triple effect crystallizer steam drain is crystallized with triple effect Device gland steam exhauster is connected；The triple effect heater of the outlet and the triple effect heater shell side top of the two effects separator gland steam exhauster enters Steam ports is connected, and the outlet of the two effects condensate line is connected with the triple effect condensate inlet of the triple effect heater shell side bottom, The triple effect condensate outlet of the triple effect heater shell side bottom is connected with triple effect condensate line；The two effects separator gland steam exhauster Triple effect auxiliary heater air intake of the outlet also with the triple effect auxiliary heater shell side top be connected, described two imitate condensate liquid The outlet of pipe is also connected with the triple effect auxiliary condensate inlet of the triple effect auxiliary heater shell side bottom, and the triple effect auxiliary adds The triple effect auxiliary condensate outlet of hot device shell side bottom is connected with triple effect auxiliary condensate line.

6. the methanol aqueous solution evaporation recovery system of sodium chloride according to claim 5, it is characterised in that：Under the triple effect Entrance of the lower end of row circulation pipe also with triple effect magma pump is connected, the outlet of the triple effect magma pump and the charging of triple effect cyclone Mouth is connected, and the top exit of the triple effect cyclone is connected by triple effect magma return duct with the triple effect crystallizer refluxing opening, The outlet at bottom of the triple effect cyclone is connected with the entrance of stiff tank, the outlet at bottom of the stiff tank and the top of centrifuge Charging aperture is connected, and the solid-phase outlet of the centrifuge is connected with sodium chloride collection system；The liquid-phase outlet of the centrifuge and institute The stiff tank overfall for stating stiff tank top is connected with the entrance of mother liquor tank respectively.

7. the methanol aqueous solution evaporation recovery system of sodium chloride according to claim 6, it is characterised in that：Also include quadruple effect Crystallizer, the top of the quadruple effect crystallizer, which is provided with the middle part of quadruple effect crystallizer steam drain, the circumferential wall of the quadruple effect crystallizer, to be set There are quadruple effect crystallizer circulation port and quadruple effect crystallizer refluxing opening, the bottom of the quadruple effect crystallizer discharges provided with quadruple effect crystallizer Mouthful；It is connected with quadruple effect auxiliary heater below the quadruple effect crystallizer discharging opening, the quadruple effect auxiliary heater lower end goes out Material mouth is connected by quadruple effect downlink cycle pipe with the entrance of quadruple effect circulating pump, and the outlet of the quadruple effect circulating pump is up by quadruple effect Circulation pipe 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 is connected；The outlet of the triple effect magma efferent duct is connected with the quadruple effect downlink cycle pipe, the quadruple effect crystallizer row Steam ports is connected with quadruple effect crystallizer gland steam exhauster；The outlet of the triple effect crystallizer gland steam exhauster and the quadruple effect heater shell side top Quadruple effect heater shell side air intake be connected, the outlet of the triple effect condensate line and the quadruple effect of the quadruple effect heater lower end add Hot device condensate inlet is connected, quadruple effect heater condensate outlet and the quadruple effect condensate line of the quadruple effect heater shell side bottom It is connected；Quadruple effect auxiliary heater of the outlet of the triple effect crystallizer gland steam exhauster also with the quadruple effect auxiliary heater shell side top Air intake is connected, the quadruple effect auxiliary heater of the outlet and the quadruple effect auxiliary heater lower end of the triple effect auxiliary condensate line Condensate inlet is connected, quadruple effect auxiliary heater condensate outlet and the quadruple effect of the quadruple effect auxiliary heater shell side bottom Condensate line is connected；The entrance of the outlet access solvent tank of the quadruple effect condensate line, the bottom of the solvent tank and solvent pump Entrance be connected, the outlet of the solvent pump is connected with solvent efferent duct.

8. the methanol aqueous solution evaporation recovery system of sodium chloride according to claim 7, it is characterised in that：Under the quadruple effect Entrance of the lower end of row circulation pipe also with quadruple effect magma pump is connected, the outlet of the quadruple effect magma pump and the charging of quadruple effect cyclone Mouth is connected, and the top exit of the quadruple effect cyclone is connected by quadruple effect magma return duct with the quadruple effect crystallizer refluxing opening, The outlet at bottom of the quadruple effect cyclone is connected with the entrance of the stiff tank；The outlet of the mother liquor tank and the entrance of mother liquor pump It is connected, the outlet of the mother liquor pump passes through mother liquor reflux pipe and the quadruple effect crystallizer mother liquor in the middle part of the quadruple effect crystallizer circumferential wall Inlet is connected.

9. the methanol aqueous solution evaporation recovery system of sodium chloride according to claim 8, it is characterised in that：The quadruple effect knot The outlet of brilliant device gland steam exhauster is connected with the air inlet of surface condenser shell side upper end, the condensation of the surface condenser shell side lower end Liquid row's mouth is connected by surface condenser return duct with the entrance of the solvent tank；The exhaust of the surface condenser shell side lower end Mouth is connected with the pump orifice of water-ring vacuum pump, and the exhaust outlet of the water-ring vacuum pump is connected with vacuum pump discharges pipe, described The machine water shutoff outlet of water-ring vacuum pump is connected with vacuum pump circulating water tank, the bottom of the vacuum pump circulating water tank and recirculated water The entrance of pump 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 methanol aqueous solution evaporation recovery system of sodium chloride according to claim 9, it is characterised in that：The stoste 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 exhaust outlet, each fixed gas exhaust outlet 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 exhaust outlet of shell side top and the bottom is connected with the 2nd effect evaporator air intake or is connected with the fixed gas exhaust main respectively.