CN208869344U - A kind of multiple-effect evaporation concentration systems of brine waste - Google Patents

Abstract

The utility model discloses a kind of multiple-effect evaporation concentration systems of brine waste, and including vapour compression machine, multiple evaporators set gradually, each evaporator is equipped with inlet, liquid outlet, vapor inlet port and gas outlet；The vapor inlet port of foremost evaporator is connected to the outlet of vapour compression machine by pipeline, backmost the gas outlet on evaporator is connected to the suction inlet of vapour compression machine by pipeline and is connected to closed water pot by condenser, closed water pot is led in the connection of one vacuum pump, and the suction inlet of vapour compression machine is also connected to external jet chimney；Between adjacent vaporizers, behind liquid outlet on evaporator pass through the inlet that pipeline is connected on the evaporator of front；Gas outlet on the evaporator of front is connected to the vapor inlet port on evaporator below by pipeline；Material wastewater inlet pipe is connected to the inlet on evaporator backmost, and the liquid outlet on the evaporator of foremost, which passes through pipeline connection material wastewater inlet pipe and bypasses, concentrated water outlet pipe.The utility model energy-saving effect is obvious, and low energy consumption.

Description

A kind of multiple-effect evaporation concentration systems of brine waste

Technical field

The utility model relates to the concentration equipment manufacturing technology field of waste water, especially a kind of multiple-effect of brine waste Evaporation concentration system.

Background technique

In the industrial production, it utilized to reinforce industrial water circulation, improve water-use efficiency and prevention and treatment industrial pollution etc., warp The processing problem of brine waste can often be encountered.There are two types of the method for processing is usual: one is waste water be concentrated, crystallized, point The processing such as salt, to achieve the purpose that " waste water recycling " and " near-zero release "；Another kind is not can be carried out for containing radioactivity etc. The brine waste of salt is crystallized, divided, then needs to store on the spot, but over time, a large amount of memory space can be occupied until not depositing Space is stored up, this just needs for waste water to be concentrated, and reduces memory space to the greatest extent.No matter which kind of method, require to carry out waste water Concentration just can be reduced later crystallization, the cost for dividing salt or storage.

At present more commonly used method for concentration have high pressure membrane reverse osmosis, multistage flash distillation (MSF) and multiple-effect evaporation (MED) this three Kind method.Since the cycles of concentration of high pressure membrane reverse osmosis is limited, the general method using evaporation is concentrated, but uses evaporation Mode energy consumption cost it is higher.

Utility model content

The technical problem to be solved by the present invention is to provide a kind of multiple-effect evaporation concentration systems of brine waste, can compared with Low temperature and concentration is evaporated in the case where relatively making full use of the energy, energy-saving effect is more obvious.

A kind of to achieve the above purpose, the technical solution of the present invention is: multiple-effect evaporation concentration systems of brine waste, Including vapour compression machine, multiple evaporators, each evaporator includes shell, gas-liquid separator, be fixed in shell upper perforated plate and Lower perforated plate is fixed with the heat exchange of more connections upper perforated plate upper spaces and lower perforated plate lower room between upper perforated plate and lower perforated plate Pipe；Upper perforated plate housing above is equipped with inlet, and the shell below lower perforated plate is equipped with liquid outlet and secondary steam export mouth, Secondary steam export mouth is higher than liquid outlet；Shell between upper perforated plate and lower perforated plate is equipped with vapor inlet port and condensed water exports Mouthful, vapor inlet port is higher than condensed water export mouth；The side of gas-liquid separator is equipped with liquid gas Mixed design mouth, gas-liquid separator Top is equipped with gas outlet；Liquid gas Mixed design mouth is connected to the secondary steam export mouth, the lower part of gas-liquid separator by pipeline Equipped with water outlet, the water outlet of gas-liquid separator lower part is connected with the liquid outlet on shell by pipeline；

Multiple evaporators are set gradually, and the vapor inlet port of foremost evaporator is connected to the row of vapour compression machine by pipeline Outlet, backmost the gas outlet of the gas-liquid separator on evaporator is connected to the suction inlet of vapour compression machine by pipeline, backmost The gas outlet of gas-liquid separator on evaporator also connects condenser entrance by pipeline, and condenser outlet is connected to close by pipeline Water pot top is closed, a vacuum pump is connected to closed water pot top by pipeline, and the suction inlet of vapour compression machine is also connected to external steam Pipeline；

Between adjacent vaporizers, the liquid outlet on evaporator shell below connects the suction of the first concentrated water pump by pipeline Entrance, inlet of the outlet of the first concentrated water pump by pipeline connection on the evaporator shell of front；It is evaporated in front The gas outlet of gas-liquid separator on device passes through the vapor inlet port in pipeline connectivity part later evaporator shell；In below Condensed water export mouth of the condensed water export mouth by pipeline connection on the evaporator shell of front on evaporator shell；It is in Backmost the condensed water export mouth on evaporator shell also passes through pipeline and is connected to closed water pot top；

Material wastewater inlet pipe is connected to the inlet on evaporator shell backmost, on the evaporator shell of foremost Liquid outlet connects the suction inlet of the second concentrated water pump by pipeline, and the outlet of the second concentrated water pump is connected to condenser feed liquid by pipeline Import, condenser material liquid outlet are connected to material wastewater inlet pipe by pipeline；The outlet and condenser feed liquid of second concentrated water pump Pipeline between import, which also bypasses, concentrated water outlet pipe, and the first control valve is housed on concentrated water outlet pipe, is in foremost evaporator Lower part be equipped with salinometer, when salinometer detection material waste water meet Waste water concentrating requirement after, the first control valve open through dense The material waste water of contracting carries out outlet by concentrated water outlet pipe or enters Crystallization Procedure.

It is preferred that the every heat exchanger tube is vertically arranged, upper perforated plate and lower perforated plate are horizontally disposed.It is easy to implement vertically moving membrane steaming Hair.

It is further improved, the second control valve is housed, the shell in evaporator backmost is under on material wastewater inlet pipe Liquidometer is housed below tube sheet, the aperture of the second control valve is controlled by the data of liquidometer detection, so that backmost steaming Liquid level is in setting range in hair device；Being equipped in connecting pipe of the condenser material liquid outlet with material wastewater inlet pipe prevents from returning The check valve of stream.

It is further improved, the shell in evaporator backmost is additionally provided with fixed gas export between upper perforated plate and lower perforated plate Mouthful, fixed gas export mouth is connected to condenser entrance by connecting pipe, and connecting pipe is equipped with throttle valve.Convenient for being discharged backmost The intracorporal on-condensible gas of the shell of evaporator promotes heat transfer effect.

It is further improved, the shell of each evaporator before evaporator backmost is between upper perforated plate and lower perforated plate Equipped with communication port on on-condensible gas, the shell of each evaporator before evaporator backmost is equipped with below lower perforated plate Communication port under on-condensible gas, communication port is connected with communication port under on-condensible gas by connecting pipe on on-condensible gas, connecting tube Road is equipped with throttle valve.Convenient for the on-condensible gas in discharge evaporator shell body, heat transfer effect is promoted.

It is further improved, the heat exchange pipe orifice top is inserted with a material waste water diversion column, and the diversion column includes upper Introduction part and lower leading-out portion and the necking part for connecting upper introduction part and lower leading-out portion, the upper end of upper introduction part are equipped with shoulder, water conservancy diversion Column is supported on upper perforated plate by the shoulder, is equipped with diversion trench, the lower leading-out portion appearance in the upper introduction part outer peripheral surface Annular gap is formed between face and heat exchange pipe internal surface, material waste water flows into heat exchanger tube along the diversion trench then through the contracting Neck and heat exchanger tube surround behind buffer area along the annular gap downwards at thin film drainage.By the effect of this structure diversion column, The diversion trench of material waste water upper introduction part outer peripheral surface from diversion column flows into heat exchanger tube, and then material waste water is in the contracting Neck and heat exchanger tube surround carried out at buffer area it is of short duration mix, stop after, the table along the lower leading-out portion outer surface and heat exchanger tube Annular gap is formed between face downwards at thin film drainage.Material waste water just obtains in heat exchanger tube at thin film drainage uniformity in this way It effectively improves.Be conducive to improve evaporation and concentration effect of the material waste water in heat exchanger tube, and can prevent material waste water crystallization and Fouling in heat exchanger tube.

It is preferred that the diversion trench has multiple, each diversion trench is twist distributed.

As a preference, the upper introduction part includes upper cylinder and lower taper platform, under upper cylinder is greater than The part of portion's taper platform constitutes the shoulder, and the maximum outside diameter of the lower taper platform is equal with the internal diameter of the heat exchanger tube or omits Less than the internal diameter of the heat exchanger tube, the necking part is cylindrical body, the minimum outer diameter of the lower taper platform and the necking part Outer diameter is equal, and the diversion trench is along the upper cylinder outer peripheral surface and part the lower taper platform periphery EDS maps；It is described Lower leading-out portion outer peripheral surface is back taper platform, and the maximum outside diameter of the lower leading-out portion is less than the internal diameter of the heat exchanger tube, leads under described The minimum Wai Jing≤necking part outer diameter in portion out.

It is up big and down small stepped cylinder as a kind of preferably upper introduction part, upper cylinder is greater than lower cylinder Part constitute the shoulder, the lower cylindrical external surface of upper introduction part is matched with the heat exchange pipe internal surface, the contracting Neck is cylindrical body, and the lower cylinder that the necking part is connected the upper introduction part forms ladder circle cylindricality, the necking part Outer diameter is less than the lower cylinder outer diameter of the upper introduction part, and the diversion trench penetrates through the top and bottom of the upper introduction part； The lower leading-out portion outer peripheral surface is back taper platform, and the maximum outside diameter of the lower leading-out portion is less than the internal diameter of the heat exchanger tube, described Minimum Wai Jing≤necking part outer diameter of lower leading-out portion.

Further, the upper introduction part upper surface has upwardly extended clamping part；The cross section of the clamping part is circle Or it is rectangular.By the clamping part convenient for taking out diversion column, to be convenient for changing and safeguard.

On the one hand the utility model passes through vacuum pumping action, each evaporator inner space can be made to be in vacuum state, this When heat exchanger tube in material waste water be heated to saturation evaporation temperature reduce, the utility model may be implemented 70 DEG C or so carry out It is concentrated by evaporation.It, can be preferably energy saving in this way compared with can be achieved with being concentrated by evaporation under low temperature condition.On the other hand, before being in Material waste water is concentrated by evaporation the secondary steam generated and is recycled as heating source in the evaporator of face, is sent into evaporator below and carries out Heating, and the secondary steam that material waste water is concentrated by evaporation generation in evaporator backmost is squeezed by vapour compression machine sucking It is recycled in the evaporator of foremost.Therefore the recycling effect of the energy is preferable, can also save the energy, reduce energy consumption at This.

In addition, circulation concentration may be implemented in the material waste water of the utility model, it can preferably guarantee the concentration of material waste water It is required that.

Detailed description of the invention

Fig. 1 is the system structure diagram of the first embodiment of the utility model；

Fig. 2 is the structure sectional view of the first embodiment evaporator of the utility model；

Fig. 3 is enlarged drawing at the A of Fig. 2；

Fig. 4 is the main view of the first embodiment diversion column of the utility model；

Fig. 5 is the top view of the first embodiment diversion column of the utility model；

Fig. 6 is second of embodiment evaporation structure cross-sectional view of the utility model；

Fig. 7 is enlarged drawing at the B of Fig. 6；

Fig. 8 is the main view of second of embodiment diversion column of the utility model.

Specific embodiment

The utility model is described in further detail with specific embodiment with reference to the accompanying drawing.

Shown in Fig. 1 to Fig. 5, a kind of multiple-effect evaporation concentration systems of brine waste, including vapour compression machine 100, Duo Gezheng Device 200 is sent out, the evaporator 200 of the utility model can be two or more, and the present embodiment is by taking three evaporators 200 as an example.Three Evaporator 200 is set gradually, and the evaporator 200 in foremost is 1st effective evaporator, is the in intermediate evaporator 200 2nd effect evaporator is third effect evaporator (last evaporator) in rearmost evaporator 200.

Each evaporator 200 includes shell 1, gas-liquid separator 2, is fixed with upper perforated plate 3 and lower perforated plate 4, upper tube in shell 1 The heat exchanger tube 5 of more connections 3 upper spaces of upper perforated plate and 4 lower room of lower perforated plate is fixed between plate 3 and lower perforated plate 4；Every Heat exchanger tube 5 is vertically arranged, and upper perforated plate 3 and lower perforated plate 4 are horizontally disposed；3 housing above 1 of upper perforated plate is equipped with inlet 11, under Shell 1 below tube sheet 4 is equipped with liquid outlet 12 and secondary steam export mouth 13, and secondary steam export mouth 13 is higher than liquid outlet 12；Shell 1 between upper perforated plate 3 and lower perforated plate 4 is equipped with vapor inlet port 14 and condensed water export mouth 15, vapor inlet port 14 Higher than condensed water export mouth 15；The side of gas-liquid separator 2 is equipped with liquid gas Mixed design mouth 21, and the top of gas-liquid separator 2 is set There is gas outlet 22；Liquid gas Mixed design mouth 21 is connected to the secondary steam export mouth 13, the lower part of gas-liquid separator 2 by pipeline Equipped with water outlet 23, the water outlet 23 of 2 lower part of gas-liquid separator is connected with the liquid outlet 12 on shell 1 by pipeline.

As previously mentioned, three evaporators 200 are set gradually, the vapor inlet port 14 in foremost evaporator 200 passes through Pipeline is connected to the outlet of vapour compression machine 100, and the gas outlet 22 of the gas-liquid separator 2 on evaporator 200 backmost is logical Piping is connected to the suction inlet of vapour compression machine 100, and backmost the gas outlet 22 of the gas-liquid separator 2 on evaporator 200 is also logical Piping connects 6 entrance of condenser, and the outlet of condenser 6 is connected to closed 7 top of water pot by pipeline, and a vacuum pump 8 passes through pipeline It is connected to closed 7 top of water pot, the suction inlet of vapour compression machine 100 is also connected to external jet chimney 1a.

Between adjacent vaporizers 200, the liquid outlet 12 on 200 shell 1 of evaporator below passes through pipeline connection first The suction inlet of concentrated water pump 9, feed liquor of the outlet of the first concentrated water pump 9 by pipeline connection on 200 shell 1 of front evaporator Mouth 11；The gas outlet 22 of gas-liquid separator 2 on front evaporator 200 passes through pipeline connectivity part evaporator 200 later Vapor inlet port 14 on shell 1；Condensed water export mouth 15 on 200 shell 1 of evaporator below passes through pipeline connectivity part Condensed water export mouth 15 on 200 shell 1 of front evaporator；Condensed water export on 200 shell 1 of evaporator backmost Mouth 15 is also connected to closed 7 top of water pot by pipeline；The lower part of closed water pot 7 connects a suction pump 71, closed 7 lower part of water pot Condensed water is discharged by suction pump 71.

Material wastewater inlet pipe 1b is connected to the inlet 11 on 200 shell 1 of evaporator backmost, material wastewater inlet pipe 1b Material waste water is also squeezed by a water supply pump 10, the liquid outlet 12 on 200 shell 1 of foremost evaporator is connected by pipeline The outlet of the suction inlet of second concentrated water pump 91, the second concentrated water pump 91 is connected to 61 liquor inlet of condenser, condenser by pipeline 61 material liquid outlets are connected to material wastewater inlet pipe 1b by pipeline；Convenient for concentrated material waste water is given up with unconcentrated material Water mixing, which is re-fed into evaporator 200 backmost, is evaporated concentration；

Pipeline between 61 liquor inlet of outlet and condenser of second concentrated water pump 91, which also bypasses, concentrated water outlet pipe 1c, First control valve 20 is housed, the lower part in foremost evaporator 200 is equipped with salinometer 30, works as salinometer on concentrated water outlet pipe 1c After the material waste water of 30 detections meets Waste water concentrating requirement, the first control valve 20 is opened concentrated material waste water and is gone out by concentrated water Water pipe 1c carries out outlet or enters Crystallization Procedure.

Second control valve 40 is housed, the shell 1 in evaporator 200 backmost is in lower perforated plate on material wastewater inlet pipe 1b Liquidometer 50 is housed below 4, the aperture of the second control valve 40 is controlled by data that liquidometer 50 detects, it is last to guarantee Liquid level is in setting range in face evaporator 200；It may also set up liquidometer 50 in the lower part of other 200 shells 1 of evaporator, be convenient for Observe the height of each 200 lower part liquid level of evaporator.

Being equipped in the connecting pipe of 61 material liquid outlet of condenser and material wastewater inlet pipe 1b prevents the check valve to backflow 62。

Shell 1 in evaporator 200 backmost is additionally provided with fixed gas export mouth 16 between upper perforated plate 3 and lower perforated plate 4, Fixed gas export mouth 16 is connected to 6 entrance of condenser by connecting pipe, and connecting pipe is equipped with throttle valve 60.It is steamed in backmost The shell 1 for sending out each evaporator 200 of 200 front of device is equipped with communication port on on-condensible gas between upper perforated plate 3 and lower perforated plate 4 17, under the shell 1 in each evaporator 200 of 200 front of evaporator backmost is equipped with on-condensible gas below lower perforated plate 4 Communication port 18, communication port 17 is connected with communication port 18 under on-condensible gas by connecting pipe on on-condensible gas, in connecting pipe Equipped with throttle valve 60.Pass through communication port 18 under communication port 17, on-condensible gas on the fixed gas export mouth 16, on-condensible gas and throttling Valve 60 is convenient for the on-condensible gas in the shell 1 of discharge evaporator 200.

Communication port 17 and fixed gas export mouth 16 can also only settings one on the on-condensible gas being arranged on 200 shell of evaporator It is a.

To improve uniformity of the material waste water in heat exchange pipe internal surface at thin film drainage, the evaporation and concentration of improving material waste water Effect, the every 5 inner hole top of heat exchanger tube are inserted with a diversion column 70, and the diversion column 70 includes upper introduction part 701 under Leading-out portion 702 and the necking part 703 for connecting upper introduction part 701 and lower leading-out portion 702, the upper end of upper introduction part 701 are equipped with shoulder 7010, diversion column 70 is supported on upper perforated plate 3 by the shoulder 7010, set in upper 701 outer peripheral surface of introduction part there are three Diversion trench 70a, each diversion trench 70a is twist distributed, between lower 702 outer surface of leading-out portion and 5 inner surface of heat exchanger tube Annular gap 70b is formed, material waste water flows into heat exchanger tube 5 along the diversion trench 70a then through the necking part 703 and heat exchange Pipe 5 surrounds after the 70c of buffer area along the annular gap 70b downwards at thin film drainage.

The upper introduction part 701 includes upper cylinder 7011 and lower taper platform 7012, and upper cylinder 7011 is greater than The part of lower taper platform 7012 constitutes the shoulder 7010, the maximum outside diameter and the heat exchanger tube of the lower taper platform 7012 5 internal diameter is equal or slightly less than the internal diameter of the heat exchanger tube 5, and the necking part 703 is cylindrical body, the lower taper platform 7012 Minimum outer diameter it is equal with 703 outer diameter of necking part, the diversion trench 70a is along 7011 outer peripheral surface of upper cylinder and portion Divide the 7012 periphery EDS maps of lower taper platform；

702 outer peripheral surface of lower leading-out portion is back taper platform, and the maximum outside diameter of the lower leading-out portion 702 is less than the heat exchange The internal diameter of pipe 5, minimum Wai Jing≤703 outer diameter of the necking part of the lower leading-out portion 702.

701 upper surface of upper introduction part has upwardly extended clamping part 704, and the cross section of the clamping part 704 is circle, It can also be rectangular.The centre of the diversion column 70 of the present embodiment may also set up venthole, which runs through clamping part 704.

Pass through the design feature of diversion column 70 in this way, material waste water tangent line is imported heat exchanger tube 5 by multiple diversion trench 70a, so Carried out at the necking part 703 surrounds buffer area 70c with heat exchanger tube 5 afterwards it is of short duration mix, stop after, then along the lower leading-out portion Annular gap 70b is formed between 5 inner surface of 702 outer surfaces and heat exchanger tube downwards at thin film drainage.Thus effectively improve material Waste water, at the uniformity of thin film drainage, improves material waste water and is concentrated by evaporation effect in 5 inner surface of heat exchanger tube；Also material can be prevented useless Water is in 5 inner surface fouling of heat exchanger tube, crystallization.

The course of work of this system is as follows: being vacuumized first by vacuum pump 8 to system, controls each evaporator The absolute pressure of 200 5 pore space of heat exchanger tube is 10~30kPa, and keeps pressure basicly stable, to ensure that material waste water exists Evaporating temperature in heat exchanger tube 5 is no more than 70 DEG C.Vacuum pump 8 can also be in 200 shell 1 of evaporator during vacuumizing On-condensible gas extraction, convenient for improving heat exchange effect.

External steam is passed through the steam on foremost evaporator 200 (1st effective evaporator) shell 1 by vapour compression machine 100 Input port 14 is squeezed into, part derived from the 2 top gas outlet 22 of gas-liquid separator from evaporator 200 (last evaporator) backmost Then secondary steam, which is also sucked by vapour compression machine 100, to be compressed, pressure and temperature is squeezed into most together with external steam after being promoted In front evaporator 200 (1st effective evaporator) shell 1, the recycling of secondary steam is realized.Steam into evaporator 200 exists It flows in the outside of heat exchanger tube 5；

Water supply pump 10 passes through the material waste water of concentration to be evaporated on evaporator 200 (last evaporator) shell 1 backmost Inlet 11 squeeze into evaporator 200, the material waste water of concentration to be evaporated is imported in heat exchanger tube 5 and downwards by diversion column 70 At thin film drainage；Material waste water through being concentrated by evaporation for the first time is by the first concentrated water pump 9 from central evaporator 200 (second Effect evaporator) inlet 11 on shell 1 squeezes into evaporator 200 and carries out second and be concentrated by evaporation, be concentrated by evaporation for the second time Material waste water by another first concentrated water pump 9 from foremost evaporator 200 (1st effective evaporator) shell 1 into Liquid mouth 11, which is squeezed into, carries out third time evaporation and concentration in evaporator 200, material waste water after being concentrated by evaporation three times, if salinometer 30 After the material waste water of detection meets Waste water concentrating requirement, the first control valve 20 opens concentrated material waste water and passes through the second concentrated water 91 and concentrated water outlet pipe 1c is pumped to carry out outlet or enter Crystallization Procedure；If the material waste water that salinometer 30 detects is not met by After Waste water concentrating requires, the first control valve 20 is closed, and concentrated material waste water squeezes into condenser 61 by the second concentrated water pump 91 It mixes to send back to unconcentrated material waste water again after cooling and is in dense again in evaporator 200 (last evaporator) backmost Contracting realizes circulation concentration until meeting the requirements.

The interior secondary steam generated that is concentrated by evaporation of evaporator 200 (1st effective evaporator) passes through it to material waste water up front The export of 2 top gas outlet 22 of gas-liquid separator, which is sent into central evaporator 200 (2nd effect evaporator), carries out hot friendship with heat exchanger tube 5 The heating of material waste water is given, material waste water is concentrated by evaporation；Material waste water steams in central evaporator 200 (2nd effect evaporator) The secondary steam that hair concentration generates is sent into 200 (end effect of evaporator backmost by the export of its 2 top gas outlet 22 of gas-liquid separator Evaporator) in heat exchanger tube 5 carry out heat exchange give material waste water heat, make material waste water be concentrated by evaporation；Material waste water is last It is concentrated by evaporation the secondary steam generated in face evaporator 200 (last evaporator) and passes through its 2 top gas outlet 22 of gas-liquid separator Export, a part of injection are squeezed into foremost evaporator 200 again after being compressed to vapour compression machine 100 and are recycled, another part It is then sent to closed water pot 7 by forming condensed water after the cooling of condenser 6, to guarantee the integral pressure of system.Steam is steaming The condensed water for exchanging heat in device 200 and condensing and generating is sent out to lead to again by pipeline to water pot 7, the condensed water in sealing water pot 7 is sealed Cross 71 outlet of suction pump.

The on-condensible gas generated in evaporator 200 by fixed gas export mouth 16 on 200 shell 1 of evaporator, does not coagulate Communication port 18 and throttle valve 60 and associated conduit are extracted out by vacuum pump 8 under communication port 17, on-condensible gas on gas, in favor of improving The heat transfer effect of heat exchanger tube 5.

Shown in embodiment two, Fig. 6 to Fig. 8, a kind of multiple-effect evaporation concentration systems of brine waste are different from embodiment one , the diversion column 70 of the structure of the diversion column 70 that every 5 inner hole top of heat exchanger tube is inserted in evaporator 200 and embodiment one is not Together.

The upper introduction part 701 of the diversion column 70 of the present embodiment is up big and down small stepped cylinder, and upper cylinder 7011 is big The shoulder 7010,7013 outer surface of lower cylinder of upper introduction part 701 and institute are constituted in the part of lower cylinder 7013 It states 5 inner surface of heat exchanger tube to match, the necking part 703 is cylindrical body, and the necking part 703 is connected the upper introduction part 701 Lower cylinder 7013 formed ladder circle cylindricality, 703 outer diameter of necking part be less than the upper introduction part 701 lower cylindrical 7013 outer diameter of body, the diversion trench 70a penetrate through the top and bottom of the upper introduction part 701；

702 outer peripheral surface of lower leading-out portion is back taper platform, and the maximum outside diameter of the lower leading-out portion 702 is less than the heat exchange The internal diameter of pipe 5, minimum outer diameter > 703 outer diameter of the necking part of the lower leading-out portion 702.

The above is only two preferred embodiments of the utility model, and those skilled in the art is made equivalent by claim Change the protection scope for both falling within this case.

Claims (10)

1. a kind of multiple-effect evaporation concentration systems of brine waste, including vapour compression machine, multiple evaporators, it is characterised in that: every A evaporator includes shell, gas-liquid separator, and upper perforated plate and lower perforated plate are fixed in shell, is connected between upper perforated plate and lower perforated plate There is the heat exchanger tube of more connections upper perforated plate upper spaces and lower perforated plate lower room；Upper perforated plate housing above is equipped with feed liquor Mouthful, the shell below lower perforated plate is equipped with liquid outlet and secondary steam export mouth, and secondary steam export mouth is higher than liquid outlet；Upper tube Shell between plate and lower perforated plate is equipped with vapor inlet port and condensed water export mouth, and vapor inlet port is exported higher than condensed water Mouthful；The side of gas-liquid separator is equipped with liquid gas Mixed design mouth, and the top of gas-liquid separator is equipped with gas outlet；Liquid gas Mixed design Mouth is connected to the secondary steam export mouth by pipeline, and the lower part of gas-liquid separator is equipped with water outlet, gas-liquid separator lower part Water outlet is connected with the liquid outlet on shell by pipeline；

Multiple evaporators are set gradually, and the vapor inlet port of foremost evaporator is connected to the discharge of vapour compression machine by pipeline Mouthful, backmost the gas outlet of the gas-liquid separator on evaporator is connected to the suction inlet of vapour compression machine by pipeline, backmost steams The gas outlet for sending out the gas-liquid separator on device also connects condenser entrance by pipeline, and condenser outlet is connected to closed by pipeline Water pot top, a vacuum pump are connected to closed water pot top by pipeline, and the suction inlet of vapour compression machine is also connected to external steam pipe Road；

Between adjacent vaporizers, the liquid outlet on evaporator shell below connects the sucking of the first concentrated water pump by pipeline Mouthful, inlet of the outlet of the first concentrated water pump by pipeline connection on the evaporator shell of front；In front evaporator On the gas outlet of gas-liquid separator pass through the pipeline connectivity part vapor inlet port on evaporator shell later；It is steamed in below Send out condensed water export mouth of the condensed water export mouth by pipeline connection on the evaporator shell of front on device shell；In most The condensed water export mouth on evaporator shell also passes through pipeline and is connected to closed water pot top below；

Material wastewater inlet pipe is connected to the inlet on evaporator shell backmost, goes out liquid on the evaporator shell of foremost Mouthful by pipeline connect the second concentrated water pump suction inlet, the second concentrated water pump outlet by pipeline connection condenser feed liquid into Mouthful, condenser material liquid outlet is connected to material wastewater inlet pipe by pipeline；Second concentrated water pump outlet and condenser feed liquid into Pipeline between mouthful, which also bypasses, concentrated water outlet pipe, the first control valve is housed, in foremost evaporator on concentrated water outlet pipe Lower part is equipped with salinometer, and after the material waste water of salinometer detection meets Waste water concentrating requirement, the first control valve is opened concentrated Material waste water by concentrated water outlet pipe carry out outlet or enter Crystallization Procedure.

2. a kind of multiple-effect evaporation concentration systems of brine waste according to claim 1, it is characterised in that: changed described in every Heat pipe is vertically arranged, and upper perforated plate and lower perforated plate are horizontally disposed.

3. a kind of multiple-effect evaporation concentration systems of brine waste according to claim 1, it is characterised in that: material waste water into Second control valve is housed, the shell in evaporator backmost is equipped with liquidometer below lower perforated plate, passes through liquid level on water pipe The data of detection are counted to control the aperture of the second control valve, so that backmost liquid level in evaporator is in setting range；It is condensing The connecting pipe of device material liquid outlet and material wastewater inlet pipe, which is equipped with, prevents the check valve to backflow.

4. a kind of multiple-effect evaporation concentration systems of brine waste according to claim 1, it is characterised in that: in backmost The shell of evaporator is additionally provided with fixed gas export mouth between upper perforated plate and lower perforated plate, and fixed gas export mouth is connected by connecting pipe Logical condenser entrance, connecting pipe are equipped with throttle valve.

5. a kind of multiple-effect evaporation concentration systems of brine waste according to claim 1, it is characterised in that: in backmost The shell of each evaporator before evaporator is equipped with communication port on on-condensible gas between upper perforated plate and lower perforated plate, in last The shell of each evaporator before the evaporator of face is equipped with communication port under on-condensible gas below lower perforated plate, connects on on-condensible gas Port is connected with communication port under on-condensible gas by connecting pipe, and connecting pipe is equipped with throttle valve.

6. a kind of multiple-effect evaporation concentration systems of brine waste according to any one of claims 1 to 5, it is characterised in that: The heat exchange pipe orifice top is inserted with a material waste water diversion column, and the diversion column includes upper introduction part and lower leading-out portion and company The necking part of introduction part and lower leading-out portion is connected, the upper end of upper introduction part is equipped with shoulder, and diversion column is supported on by the shoulder On upper perforated plate, it is equipped with diversion trench in the upper introduction part outer peripheral surface, between the lower leading-out portion outer surface and heat exchange pipe internal surface Annular gap is formed, material waste water flows into heat exchanger tube along the diversion trench and then surrounds buffering through the necking part and heat exchanger tube Along the annular gap downwards at thin film drainage behind area.

7. a kind of multiple-effect evaporation concentration systems of brine waste according to claim 6, it is characterised in that: the diversion trench Have multiple, each diversion trench is twist distributed.

8. a kind of multiple-effect evaporation concentration systems of brine waste according to claim 6, it is characterised in that: the upper importing Portion includes upper cylinder and lower taper platform, and the part that upper cylinder is greater than lower taper platform constitutes the shoulder, described The internal diameter of the maximum outside diameter of lower taper platform and the heat exchanger tube is equal or slightly less than the internal diameter of the heat exchanger tube, the necking part For cylindrical body, the minimum outer diameter of the lower taper platform is equal with the necking part outer diameter, and the diversion trench is along top circle Cylinder outer peripheral surface and part the lower taper platform periphery EDS maps；

The lower leading-out portion outer peripheral surface is back taper platform, and the maximum outside diameter of the lower leading-out portion is less than the internal diameter of the heat exchanger tube, Minimum Wai Jing≤necking part outer diameter of the lower leading-out portion.

9. a kind of multiple-effect evaporation concentration systems of brine waste according to claim 6, it is characterised in that: the upper importing Portion is up big and down small stepped cylinder, and the part that upper cylinder is greater than lower cylinder constitutes the shoulder, upper introduction part Lower cylindrical external surface is matched with the heat exchange pipe internal surface, and the necking part is cylindrical body, and the necking part is connected institute The lower cylinder for stating introduction part forms ladder circle cylindricality, and the necking part outer diameter is less than the lower cylindrical of the upper introduction part External diameter, the diversion trench penetrate through the top and bottom of the upper introduction part；

The lower leading-out portion outer peripheral surface is back taper platform, and the maximum outside diameter of the lower leading-out portion is less than the internal diameter of the heat exchanger tube, Minimum Wai Jing≤necking part outer diameter of the lower leading-out portion.

10. a kind of multiple-effect evaporation concentration systems of brine waste according to claim 6, it is characterised in that: led on described Enter portion upper surface and upwardly extends clamping part；The cross section of the clamping part is round or rectangular.