CN208234580U - A kind of single-stage multiple-effect evaporation separator - Google Patents

Abstract

The utility model disclose it is a kind of can overcome the shortage of prior art, single-stage but there is the device of multiple-effect evaporation function simultaneously.A kind of single-stage multiple-effect evaporation separator of the utility model, including the pump and control valve of evaporator and vapour compression machine and connecting pipeline and the various liquid of conveying, dress center first and second two evaporators.The utility model overcomes the deficiencies in the prior art comprehensively, and the operating cost for the equipment that degraded significantly, and measures to effectively increase energy savings and reduce material consumption are smoothly realized.

Description

A kind of single-stage multiple-effect evaporation separator

Technical field

The utility model relates to a kind of single-stage multiple-effect evaporation separator, especially a kind of multiple-effect evaporation with MVR point From device.It include evaporator and vapour compression machine, and pipeline, the steaming in connection live steam source in the device of the utility model Evaporate condensate output transistor, waste liquid intake line to be processed, dense discharging of waste liquid pipeline after processing, and the pump of the various liquid of conveying With the control valve being set on pipeline.

Background technique

In China, the wretched insufficiency of water resource and shortage are an objective reality situations, while the repetition of water resource is sharp Acid test is faced with with pollution control.Although being achieved as National Environmental administers the increasing of policy and inspection Some gratifying achievements, still, waste water outlet are the embarrassment reality for having to face, and the public still feels that water pollution adds Play, the pressure of environmental improvement is still very big, the not change of essence.On the one hand, the waste water origin cause of formation of China's outlet is extremely complex, Difficulty of governance is larger；On the other hand, generally believe that the standard limited value of lag is excessively loose, the type and ingredient mistake of outlet pollutant In single, the substance of the limitation does not bring standard into, and major pollutants row value as defined in standard only only accounts for Injury to human body cannot be much connected to each other with environmental demand, led to sewage effluent pollution environment, deteriorated water quality.Certainly, national The construction about standard is paid much attention to, this means that once new standard is put into effect, and the sewage of original qualified discharge will be closed no longer Lattice, each manufacturing enterprise need actively to carry out technology upgrading, improve the technical level of sewage treatment.

Currently, the main method of Industrial Waste Water Treatments has the treatment process such as film concentration and evaporative crystallization.Film concentration is a kind of The technology of efficiently purifying concentration, it reaches concentration using the effective component separation for realizing orientation different from the molecular weight of liquid Effect, but effective osmotic pressure cannot be formed after the degree that inorganic salt concentration in sewage reaches certain, therefore make Narrow range, cost of investment is excessively high in addition, is not able to satisfy industrial needs at present；Evaporative crystallization is to form sewage evaporation Distilled water and strong brine, strong brine either still use MVR evaporation system using the system of traditional multiple-effect again through being separated by solid-liquid separation System, treated, and water quality is very good, and solid waste can concentrate pack, processing result ratio more thoroughly, still, calcium in waste water, Magnesium, silicon ion content are very high, and containing the solid suspensions such as a large amount of calcium carbonate and excessive ash, will be rapid in evaporator Fouling causes equipment to be unable to operate normally.

Since it is with easy to operate, space occupied is small, many advantages such as energy-saving effect is good obtain traditional MVR vapo(u)rization system To being widely applied, but it is an independent unit, and processing performance is poor, and a set of MVR vapo(u)rization system can only be same It works under one temperature and CONCENTRATION STATE, due to being evaporated the waste liquid of processing with the increase of concentration, the elevation of boiling point also mentions therewith Height, needs vapour compression machine to be capable of providing biggish vapo(u)rous temperature rise, and energy consumption dramatically increases.Meanwhile equipment is in high-temperature and high concentration Working environment in run, easily generation Structure Phenomenon, clean it is extremely difficult, operating cost increase.

And in centrifuge separation stage, grain of traditional material returned centrifuge due to concentration, temperature and crystal to supersaturated liquid Degree requirement is very high, is easy to produce clogging, and separation of solid and liquid is caused to be difficult to realize, if containing a certain amount of organic in waste liquid Object, then centrifugal effect is worse.

Boiler is usually widely used in the industrial production to generate steam to meet process requirement, outlet after fuel combustion Flue gas still has quite high temperature, and by boiler smoke, discharging directly into atmosphere, this partial heat energy do not have after desulfurization process at present It is utilized effectively.

Summary of the invention

The utility model provide it is a kind of can overcome the shortage of prior art, single-stage but there is the dress of multiple-effect evaporation function simultaneously It sets.

A kind of single-stage multiple-effect evaporation separator of the utility model, including evaporator and vapour compression machine, and connection Pipeline, the distillation condensate output transistor, waste liquid intake line to be processed, dense discharging of waste liquid pipe after processing in live steam source Road, and the control valve for conveying the pump of various liquid and being set on pipeline, dress center first and second two evaporators, respectively The communicating pipe for having circulating pump thereon is respectively arranged between the evaporated liquid output end and evaporated liquid input terminal of evaporator The secondary steam pipe efferent duct on road, each evaporator is connected to the input pipe of vapour compression machine, the steam input pipe of each evaporator with The steam output pipe of vapour compression machine and the pipeline connection for being connected to live steam source, the circulating pump upstream of the first evaporator and use In introducing waste liquid feed pipe connection to be processed, used between the circulating pump downstream of the first evaporator and the circulating pump upstream of the second evaporator The pipeline connection for having the second evaporation feed liquor control valve thereon, the evaporated liquid output end of the second evaporator and is evaporated liquid Connecting pipeline between body input terminal is located at circulating pump downstream to be gone out with the evaporation dope that threeway connection has discharging control valve thereon Expects pipe.

Preferably, a kind of single-stage multiple-effect evaporation separator of the utility model, the input pipe of waste liquid to be processed and steaming The connection of vapour preheater heated medium input pipe, the heated medium efferent duct of vapor preheater and the input terminal of surface condenser Connection, the output end of surface condenser are connected to the feed pipe of the first evaporator, and the vapor preheater utilizes flue residue heat Heating, the fixed gas arrival end of surface condenser are connected to the fixed gas outlet end of two evaporators respectively.The utility model work The mixture evolution that some vapor, incoagulable gas and air are had when making, in evaporator, because of incoagulable gas and air All it is the non-conductor of heat, evaporation will be hindered after assembling in heater, reduces heat exchange efficiency.Therefore it is arranged in the utility model Surface condenser, using the mixture of some vapor, incoagulable gas and the air that are overflowed in evaporator in surface condenser In with waste liquid to be processed carry out indirect heat exchange, steam is condensed, and forms condensed water discharge, and incoagulable gas and air mixing Object is then discharged to atmosphere, using waste liquid to be processed as the cooling medium of surface condenser, further saves energy consumption, this is practical new This structure of type keeps the discharge of mixed gas more easy by the cooling barometric gradient that quickly formed, solve the prior art from Escaped in evaporator steam, incoagulable gas and air mixture it is in line when because system pressure difference not enough caused by direct difficulty. By after surface condenser just by evaporator incoagulable gas and air be continuously discharged, ensure that the efficient of vapo(u)rization system, Steady and continuous service, and further save energy consumption.

Preferably, in a kind of single-stage multiple-effect evaporation separator of the utility model, set on the circulating pump of the second evaporator It is connected between evaporation dope discharge nozzle and the feed inlet of absorptiometer at downstream, the tangent line of intermediate tube is arranged in the feed inlet of absorptiometer On direction, the dope discharge nozzle of absorptiometer is connected to the feed inlet of automatic cutting centrifuge, the solid salt of automatic cutting centrifuge Outlet is arranged with chute, the clear liquid overflow pipe of the leakage fluid dram of automatic cutting centrifuge and absorptiometer respectively with a filtrate tank Feed end connection, the discharge end of filtrate tank is connected to waste tank to be processed.

For the utility model using a vapour compression machine, at least two groups or multiple groups evaporator share vapour pressure Contracting machine is unified after converging the secondary steam respectively generated concentration to be sent into after same vapour compression machine heating pressurization by dividing gas Cylinder distributes to an evaporator as the heat source stream being persistently evaporated.Meanwhile waste liquid is first into a wherein evaporator, Carry out tentatively evaporate after concentration risen, later out liquid to another group of evaporator, such waste liquid in different evaporators by Grade is concentrated by evaporation, similar to the technique of traditional multiple-effect evaporation.Using waste liquid, in low concentration, the elevation of boiling point is smaller, be capable of forming compared with Big effective temperature difference is big, to reduce heat exchange area, improve evaporation efficiency, thus overcomes traditional MVR evaporation element work The application limitations such as state is single, heat exchange area is larger, the cleaning frequency is shorter, that has greatly widened MVR vapo(u)rization system uses model It encloses, improves the service efficiency of equipment, reduce equipment investment and operating cost.The utility model is two evaporators of setting, But it can also be according to the technological requirements and the concrete condition of waste liquid to be processed according to the present utility model substantially former in actual application Reason more evaporators of setting, to realize the purpose of multiple-effect evaporation.

Flue gas waste heat-recovering device is arranged in the utility model, configures flue gas heat-exchange unit, is sent into after flue gas collection is summarized Into flue gas heat-exchange unit, waste heat flue gas carries out indirect heat transfer to the partial condensation water that vapo(u)rization system is formed, and partial condensation water is added Hot vapour becomes steam, and the flue gas after heat exchange returns exhaust system high-altitude outlet, and steam, which enters in vapor preheater, adds waste liquid Heat heating, provides condition for initial management, has recycled available resources.

Traditional pusher centrifuge is easy to produce since the granularity requirements of concentration, temperature and crystal to supersaturated liquid are very high Raw clogging, causes separation of solid and liquid to be difficult to realize.Do not have in evaporation stage since carnallites various in waste liquid mix The standby operating condition for forming certain particle size, even if the solid content in waste liquid is higher, but the solid of granulating is not very much, therefore usually Centrifuge is caused to block under the action of powdery solid, centrifugation task is unable to complete.In order to solve this technical problem, this is practical new Absorptiometer and automatic cutting centrifuge are provided in type.The saturation waste liquid after evaporative crystallization is further thickened using absorptiometer, Input concentration before increasing centrifugation, improves the solid content of feeding liquid, creates good basic condition for centrifuge separation.Absorptiometer Feed inlet is arranged in the tangential direction of intermediate tube, and biggish crystalline particle forms eddy flow state in entrance and thrown to wall, with Liquid stream is sunk under motional inertia and gravity, from underflow is formed, is sent from scheming in the discharge of cone bottom, and clear liquid is then due to density It is smaller, it is dynamic in upper up-flow, it is discharged, is entered in filtrate tank from top overflow port.The full-automatic cutting centrifuge of the utility model When being separated by solid-liquid separation, for waste liquid due to specific gravity difference in high speed rotation, solids is thrown to barrel, the filter membrane on barrel Can be different according to the actual situation and have different selections, filtering accuracy can be thousands of, mesh even up to up to ten thousand, the knot of waste liquid Brilliant particle and powder, which are centrifuged, is adhered to barrel filter membrane surface, and hydrone and soluble ion can then pass through filter Film, so that forming filtrate enters filtrate tank, filtrate returns vapo(u)rization system circular treatment；Later, step scraper promotes, and will be adhered to The solid material of barrel filter membrane surface cuts blanking, is exported and is discharged by crystal salt, fallen and pack along salt chute, thus thorough Bottom solves the problems, such as that carnallite is difficult to separate.

Technical solution provided by the utility model overcomes the deficiencies in the prior art comprehensively, meanwhile, degrade significantly The operating cost of equipment, enables measures to effectively increase energy savings and reduce material consumption smoothly to be realized.

Detailed description of the invention

Attached drawing 1 is that the embodiment being made of two groups of evaporators and a shared Pistonless compressor of the utility model is illustrated Figure.

Attached drawing 2 is the schematic device that the utility model heats waste water to be processed using fume afterheat.

The centrifugation systems and its operating mode schematic diagram of 3 the utility model of attached drawing.

In figure: in figure: 1 is low-temperature flue gas delivery pipe, and 2 be flue gas heat-exchange unit, and 3 be flue gas heat-exchange unit water inlet control valve, and 4 are Flue gas heat-exchange unit water inlet pipe, 5 be waste liquid liquid supply pipe, and 6 be distillation condensed water flow pipe, and 7 be evaporation dope discharge nozzle, and 8 be high temperature Flue snorkel, 9 be high-temperature flue gas collecting pipe, 10 be preheater condensate pump, 11 be flue gas heat-exchange unit vapour-discharge tube, 12 For vapor preheater, 13 be vapor preheater drip pipe, and 14 be preheater condensate water pot, and 15 be surface condenser, 16 It is vapor preheater outlet tube for surface condenser drip pipe, 17,18 be surface condenser outlet tube, and 19 be fixed gas Mixing tube, 20 be A evaporator fixed gas outlet, and 21 be A evaporation feed liquor control valve, and 22 be A evaporator circulating pump, and 23 be A Evaporator, 24 be A evaporator circulation fluid inlet tube, and 25 be A evaporator secondary steam outlet, and 26 be A evaporator steam inlet Pipe, 27 be A evaporator condensation water discharge spout, and 28 be evaporator condensation water pot, and 29 be evaporator condensation water pump, and 30 be both vapor compression Machine steam inlet tube, 31 be vapour compression machine, and 32 be vapour compression machine steam outlet pipe, and 33 be sub-cylinder, 34 for B evaporator not Solidifying gas outlet, 35 be B evaporator steam inlet pipe, and 36 be B evaporator condensation water discharge spout, and 37 be B evaporator, and 38 steam for B Device secondary steam outlet is sent out, 39 be B evaporation feed liquor control valve, and 40 be B evaporator circulating pump, and 41 be live steam pipe network, 42 be absorptiometer, and 43 be clear liquid overflow pipe, and 44 coagulate the soup dope discharge nozzle, and 45 be centrifugation control valve, 46 for automatically cut from Scheming, 47 export for solid crystal salt, and 48 be filtrate pipe, and 49 be solid salt chute, and 50 be filtrate tank, and 51 be filtrate pump, and 52 are Return to vapo(u)rization system filtrate pipe.

Specific embodiment

The utility model is explained below in conjunction with the embodiment that attached drawing provides.

The embodiment provided by attached drawing is as it can be seen that include the first evaporator 23 and the second evaporator 37 in the utility model. It is respectively arranged between first evaporator 23 and the evaporated liquid output end and evaporated liquid input terminal of the second evaporator 37 The upper connecting pipeline with first circulation pump 22 and second circulation pump 40.In the upstream threeway communicating surface of first circulation pump 22 The outlet tube 18 of condenser 15.With thereon with the second steaming between the downstream of first circulation pump 22 and the upstream of second circulation pump 40 Send out the pipeline connection of the inlet control valve 39 of device 37.The secondary steam pipe efferent duct 25 and 38 of two evaporators respectively with vapour pressure The input pipe 30 of contracting machine 31 is connected to.As seen from Figure 1, the exhaust outlet 32 of vapour compression machine 31 is connected to a sub-cylinder 33.Divide gas Cylinder 33 is respectively communicated with the steam input terminal of the first evaporator 23 and the second evaporator 37 with pipeline 26 and 35 respectively, in 26 He of pipeline Valve is also respectively provided on 35, while sub-cylinder 33 is also connected to live steam pipe 41, with meet device when originating work by Power boiler provides power steam.Communicating pipe between the evaporated liquid output end and evaporated liquid input terminal of second evaporator Road has the evaporation dope discharge nozzle 7 of discharging control valve being located at thereon with threeway connection at circulating pump downstream.First evaporation The condensed water output end of the condensed water output end and sub-cylinder 33 of device 23 and the second evaporator 37 uses pipeline 27 and 36 to connect respectively Logical condensed water intermediate storage tank 28, the output end condensate line 6 of condensed water intermediate storage tank 28 sees reuse off, in condensate line Condensate pump 29 is additionally provided on 6.By attached drawing 1 as it can be seen that being additionally provided with a surface condenser 15 in utility model device, warp The waste liquid to be processed of preheating is to be sent into surface condenser 15 to handle by pipe 17, is then discharged into surface condenser from output end and goes out Liquid pipe 18 is re-fed into the first evaporator 23 and is handled, and the outlet of the fixed gas of first and second evaporator is respectively with first The mouth fixed gas mixing of surface condenser 15 is connected to and is sent into fixed gas mixing tube 19 with the second fixed gas outlet 20 and 34 In pipe 19, the condensate pipe 16 of surface condenser is connected in preheater condensate water pot 14.

To make full use of the energy, in the device of the utility model, the waste liquid to be processed for being sent into surface condenser 15 is first passed through Vapor preheater 12 carries out the pre-heat treatment, and the preheater is heated using flue residue heat, then is sent into and is condensed with waste-solution line 17 Device 15 is respectively fed in first or second evaporator 23 or 37, again referring to attached drawing 2 after the processing of surface condenser 15.This is practical This novel structure can be fully utilized to enable source.

A kind of single-stage multiple-effect evaporation of the utility model crystallizes and separator, the input pipe and steam of waste liquid to be processed The connection of preheater heated medium input pipe, the heated medium efferent duct of vapor preheater and the input terminal of surface condenser connect Logical, the output end of surface condenser is connected to the feed pipe of the first evaporator, and the vapor preheater is added using flue residue heat Heat, the fixed gas arrival end of surface condenser are connected to the fixed gas outlet end of two evaporators respectively.Due to setting up surface Condenser, make by after surface condenser just by evaporator incoagulable gas and air be continuously discharged, ensure that evaporation system Efficient, the steady and continuous service of system.

Absorptiometer 42 and automatic cutting centrifuge 46 are additionally provided in the embodiments of the present invention, referring to attached drawing 3, In, evaporation dope discharge nozzle 7 at 40 downstream of circulating pump of the second evaporator 37 be connected between the feed inlet of absorptiometer 42, The feed inlet of absorptiometer is arranged in the tangential direction of intermediate tube, the dope discharge nozzle 44 and automatic cutting centrifuge 46 of absorptiometer Feed inlet connection.The solid salt outlet 47 of automatic cutting centrifuge 46 is arranged with chute 49, and solid salt can be through chute 49 It is transported to corresponding region.The leakage fluid dram 48 of automatic cutting centrifuge 46 and the clear liquid overflow pipe 43 of absorptiometer 42 are filtered with one respectively The feed end of flow container 50 is connected to.The discharge end of filtrate tank 50 is given up with the filtrate pipe 52 with filtrate pump 51 and control valve with to be processed Liquid storage tank connection.

The working condition of the present embodiment is as follows: being aggregated into height from high-temperature flue snorkel 8 from different smokejack exhaust gas It enters in flue gas heat-exchange unit 2 after warm flue gas collecting pipe 9, while being sent through flue gas heat-exchange unit water inlet pipe 4 into flue gas heat-exchange unit 2 Enter clear water, the condensed water that the clear water that the present embodiment is supplied to flue gas heat-exchange unit is generated from evaporation, with certain temperature and Heat content.In flue gas heat-exchange unit 2, clear water and high-temperature flue gas sufficiently exchange heat, clear water is vaporized to form steam after by flue gas heat-exchange unit Vapour-discharge tube 11 is discharged, and enters in vapor preheater 12.It is controlled by flue gas heat-exchange unit water inlet control valve 3 into flue gas and is changed Clear water amount in hot device 2, to ensure that stablizing for steam is discharged.Flue gas after heat exchange sends cigarette back to by low-temperature flue gas delivery pipe 1 Gas exhaust system outlet.

Waste liquid enters the steam generation heat exchange that in vapor preheater 12 and flue gas generates, waste liquid through waste liquid liquid supply pipe 5 Tentatively heated, steam caused by flue gas is condensed, formed condensed water after through by vapor preheater drip pipe 13 into Enter to preheater condensate water pot 14 and temporarily stores.

Waste liquid after tentatively being heated exits into surface condenser 15 from vapor preheater outlet tube 17, and comes from The mixture of the incoagulable gas and steam of A evaporator fixed gas outlet 20 and B evaporator fixed gas outlet 34 is not coagulating Converge in gas mixing tube 19, concentration, which enters in surface condenser 15, occurs heat exchange, and condensed water is formed after steam is cooling through table The condensed water mixing that face condenser drip pipe 16 enters in preheater condensate water pot 14 and vapor preheater is formed, Production reuse is sent with preheater condensate pump 10.Waste liquid is heated again, is discharged by surface condenser outlet tube 18, is entered A It is then entered in B evaporator 37 by B evaporation feed liquor control valve 39 in evaporator 23.

A is respectively started after the work liquid level needed for waste liquid meets evaporation after process pipeline enters A, B evaporator Evaporator circulating pump 22, B evaporator circulating pump 40, waste liquid are evenly distributed to respective heat exchange element surface respectively and are constantly recycled Flowing.Steam is supplied into sub-cylinder 33 through live steam pipe network 43, steam is evaporated via A evaporator steam inlet pipe 26 and B Device steam inlet pipe 35 has respectively entered in the heat exchange element of A evaporator 23 and B evaporator 37, and steam and waste liquid sufficiently carry out heat Steam is condensed after exchange, forms condensed water, discharges respectively via A evaporator condensation water discharge spout 27 and B evaporator condensation water Pipe 36 enters evaporator condensation water pot 28, then sees reuse off from distillation condensed water flow pipe 6 through evaporator condensation water pump 29, together When clear water is continuously replenished into flue gas heat-exchange unit 2.Waste liquid is constantly heated in A evaporator 23, B evaporator 37, is then reached Violent fluidized state generates a large amount of secondary steam, through A evaporator secondary steam outlet 25 and B evaporator secondary steam Outlet 38, which is pooled in vapour compression machine steam inlet tube 30, enters vapour compression machine 31, using high-tension electricity drive motor Rotation then drives vapour compression machine work, and secondary steam is warmed pressurization, and increases after heat content by vapour compression machine steam Outlet 32, which is sent in sub-cylinder 33, replaces live steam to work, and hereafter no longer needs live steam, vapour compression machine 31 is not Disconnected circulation compressed steam, evaporation continuation steadily carry out.

With the lasting progress of evaporation and concentration, waste liquid a portion condenses after being vaporized in evaporator, forms condensed water Drain, so as to cause the liquid level decline in evaporator.At this point, B evaporation feed liquor control valve 39 is opened, it is useless in A evaporator 23 Liquid enters in B evaporator 37, meanwhile, A evaporation feed liquor control valve is opened, the waste liquid in waste liquid tank via waste liquid by waste liquid Liquid supply pipe 5 feeds supplement liquid level into A evaporator 23.With the lasting progress of politics and law, waste liquid flows also in lasting progress, thus Realize that waste liquid stepped evaporation in different evaporators is concentrated, similar to the technique of traditional multiple-effect evaporation.

Inorganic salts in waste liquid are constantly crystallized after being reached saturation due to evaporation and concentration, and forming salt is brilliant, are gone out in evaporation dope It is discharged in expects pipe 7, enters absorptiometer 42 from the tangential direction of 42 feed inlet intermediate tube of absorptiometer, biggish crystalline particle is in entrance It forms eddy flow state and is thrown to wall, sink under motional inertia and gravity with liquid stream, from underflow is formed, by dope of coagulating the soup The discharge of discharge nozzle 44 is sent from scheming, and clear liquid is then since density is smaller, dynamic in upper up-flow, from 43 overflow port of upper clear supernate overflow pipe Discharge, enters in filtrate tank 50.

Waste liquid after coagulating the soup enters full-automatic cutting centrifuge 46 and is separated by solid-liquid separation, waste liquid in high speed rotation due to than Weight is different, and solids is thrown to barrel, the filter membrane on barrel can be different according to the actual situation and have different selections, mistake Filtering precision can be thousands of, and mesh even up to up to ten thousand, the crystalline particle and powder of waste liquid, which are centrifuged, is adhered to barrel filter membrane table Face, hydrone and soluble ion can then pass through filter membrane, to form filtrate, enter filtrate via filtrate pipe 48 Tank 50, filtrate send vapo(u)rization system circular treatment back to through returning to vapo(u)rization system filtrate pipe 52 by filtrate pump 51；Later, step scraper pushes away Into, will be adhered to barrel filter membrane surface solid material cutting blanking, by solid crystal salt outlet 47 discharge, along solid salt Chute 49 falls and packs, to thoroughly solve the problems, such as that carnallite is difficult to separate.

Waste liquid forms condensed water and highly concentrated high saturated brine after the device of the present embodiment is concentrated by evaporation, then through further from Solid packs reuse or as industrial preparation, to realize a resource recycling, is discharged from device residual after heart separation Waste liquid, which is fed back at waste liquid storage to be processed, re-starts processing, therefore liquid, solid dirt may be implemented in the device of the utility model Contaminate object zero-emission.

The introduction of above embodiments can be crossed it is found that the utility model can also be required according to the concrete condition and technique of waste liquid Evaporator is added in device, to be suitble to the requirement of other waste liquid triple effects or more effect processing.

Claims (3)

1. a kind of single-stage multiple-effect evaporation separator, including evaporator and vapour compression machine, and the pipe in connection live steam source Road, distillation condensate output transistor, waste liquid intake line to be processed, dense discharging of waste liquid pipeline after processing, and the various liquid of conveying The pump of body and the control valve being set on pipeline, it is characterised in that first and second two evaporators are at least set in device, respectively The communicating pipe for having circulating pump thereon is respectively arranged between the evaporated liquid output end and evaporated liquid input terminal of evaporator The secondary steam pipe efferent duct on road, each evaporator is connected to the input pipe of vapour compression machine, the steam input pipe of each evaporator with The steam output pipe of vapour compression machine and the pipeline connection for being connected to live steam source, the circulating pump upstream of the first evaporator and use In introducing waste liquid feed pipe connection to be processed, used between the circulating pump downstream of the first evaporator and the circulating pump upstream of the second evaporator The pipeline connection for having the second evaporation feed liquor control valve thereon, the evaporated liquid output end of the second evaporator and is evaporated liquid Connecting pipeline between body input terminal is located at circulating pump downstream to be gone out with the evaporation dope that threeway connection has discharging control valve thereon Expects pipe.

2. a kind of single-stage multiple-effect evaporation separator according to claim 1, it is characterised in that the input of waste liquid to be processed Pipe is connected to vapor preheater heated medium input pipe, the heated medium efferent duct of vapor preheater and surface condenser Input terminal connection, the output end of surface condenser are connected to the feed pipe of the first evaporator, and the vapor preheater utilizes cigarette Road waste-heat, the fixed gas arrival end of surface condenser are connected to the fixed gas outlet end of two evaporators respectively.

3. a kind of single-stage multiple-effect evaporation separator according to claim 1 or 2, it is characterised in that be set to the second evaporator Circulating pump downstream at evaporation dope discharge nozzle and the feed inlet of absorptiometer between be connected to, the feed inlet of absorptiometer is arranged in centre In the tangential direction of pipe, the dope discharge nozzle of absorptiometer is connected to the feed inlet of automatic cutting centrifuge, automatic cutting centrifuge Solid salt outlet be arranged with chute, the clear liquid overflow pipe of the leakage fluid dram of automatic cutting centrifuge and absorptiometer is respectively with one The feed end of a filtrate tank is connected to, and the discharge end of filtrate tank is connected to waste tank to be processed, returns system circulation processing.