CN205730417U - A kind of MVR multi-stage evaporation unit - Google Patents
A kind of MVR multi-stage evaporation unit Download PDFInfo
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- CN205730417U CN205730417U CN201620115149.9U CN201620115149U CN205730417U CN 205730417 U CN205730417 U CN 205730417U CN 201620115149 U CN201620115149 U CN 201620115149U CN 205730417 U CN205730417 U CN 205730417U
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Abstract
The open a kind of MVR multi-stage evaporation unit of this utility model, at least have employed two evaporators being serially connected in this utility model.Multistage configuration mode of the present utility model can obtain considerable energy-saving effect.This utility model directly uses pending waste liquid as cooling medium, use and vapour compression machine is set in the indirect steam exit of final evaporator, vapour compression machine and final evaporator and prime vaporizer can be made to be an organic assembling body, decrease indirect steam pipeline and vapour compression machine, and the pipeline of steam and structural damping can be made to be greatly reduced, both compression efficiency can have been made to be improved, less energy loss, the cost of whole device and operating cost can be made again to be substantially reduced.
Description
Technical field
This utility model relates to a kind of MVR vaporising device, a kind of MVR vaporising device being made up of multi-stage evaporator.
Background technology
In order to solve the use water shortage of some regions, ensure the orthobiosis of people and promote that industry sustainable development needs, China divides several stage to implement huge diversion works, employ substantial amounts of manpower and materials, but still the fact that the most fundamentally solve China's freshwater resources skewness and short water supply.Simultaneously in China, the industry such as electric power, coal and oil is discharging the trade effluent of flood tide every day to rivers,lakes and seas, and cyclic utilization rate is the highest, causes waste and the environmental pollution to a certain extent of limited water resources.Therefore water scarcity and the highest contradiction of utilization rate and environmental pollution pressure are still a more severe problem within following one period.The improvement Posterior circle that life and trade effluent taken appropriate measures utilizes, and reclaims working substance therein, is to improve living environment, a kind of effective means of solution water difficulty.
In current various sewage water treatment methods, operating cost is minimum, technical merit is the highest, regulation effect the most significantly method still uses the way of distillation.Its principle is to utilize multistage evaporation equipment to form different pressure reduction and the temperature difference, makes sewage the most all can produce boiling phenomenon, is cooled into distilled water after generating steam.Sewage is constantly concentrated, and is finally condensed to minimal amount of high-concentration waste liquid, and then recovery utility is used wherein.
MVR vaporizer is as a kind of novel evaporation equipment, owing to having obvious energy conservation and consumption reduction effects, and integrated height, the advantage such as floor space is little, control system is simple, cost of investment is low, it is widely used in evaporation equipment system.But, along with China saves energy and reduce the cost being widely implemented of quantitative measure, in the middle of actually used process, tradition MVR vapo(u)rization system encounters technical bottleneck in face of energy-saving and cost-reducing purpose realizing further.Meanwhile, MVR vapo(u)rization system is only an evaporation element, and the shortcoming that Technological adaptability is the highest in actual use the most fully exposes, and needs to use other system auxiliary, otherwise, it is impossible to complete independently uses to be needed.The most existing MVR vaporising device is single MVR vaporizer.
Summary of the invention
This utility model provides a kind of MVR vaporising device overcoming prior art not enough, a kind of MVR vaporising device being made up of multi-stage evaporator.
MVR vaporising device of the present utility model includes: vaporizer, compressor, condensate water pot, reservoir, provide the pipeline between the initial pipeline of steam, indirect steam pipeline, connection vaporizer and fluid reservoir and between each fluid reservoir for vaporizer, and valve and pump, MVR vaporising device of the present utility model at least uses two MVR vaporizers being serially connected.Use this structure can improve evaporation efficiency to greatest extent, farthest reduce energy consumption, the suitability increasing system and manufacturability.
nullThe precondition of equipment heat exchange is to there is certain temperature difference between the two，The formation system temperature difference、Pressure reduction，If indirect steam to be back to self or more previous stage equipment，The temperature and pressure of indirect steam have to be improved，It is to arrange vapour compression machine in the indirect steam exit of rear stage vaporizer that this utility model solves indirect steam for the method for self thermal source (or more previous stage) this problem，Utilize the vapour compression machine compression to indirect steam，Improve its temperature and pressure，Its concrete mode is for respectively to configure corresponding condensate water pot and circulating pump at vaporizers at different levels，The indirect steam outlet of each previous stage vaporizer shell side connects with the steam inlet of rear stage evaporator heater，In vaporizer indirect steam exit, vapour compression machine is set，The steam (vapor) outlet of vapour compression machine connects with the heater of previous stage vaporizer，Evaporator condensation water outlet pipes at different levels connect with corresponding condensate water pot，The circulation fluid outlet of vaporizers at different levels is connected with this grade of pump entry，Circulating-pump outlets at different levels connect with the circulation fluid entrance of this grade of vaporizer，The live steam pipe connecting live steam source is also had at the vapor inlet port of first evaporator heater，It is provided with live steam on described live steam pipe and controls valve.This structure of the present utility model is when initial operation, by the pending waste liquid in live steam heating first evaporator, thus produce indirect steam, it is sent to the heating chamber of rear stage vaporizer as thermal source, the indirect steam of final stage is sent into first evaporator after vapour compression machine intensification, pressurization and is used for adding in hot heater, it is evaporated pending waste liquid processing, live steam supply can be closed after System steam compressor, utilize the indirect steam that vaporizer at different levels produces to rear stage vaporizer heat supply.Thus can maximally utilise system capacity, save energy consumption.So after initial state terminates, it is possible to reoffer power steam without the external world, device is made to work under the conditions of lowest energy consumption.
Due in device of the present utility model, the initial driving force of its evaporation comes from heat source stream, inevitably carrying the incoagulable gas such as some air in heat source stream secretly, the most necessarily have the residue vapor that part end condenses simultaneously, the existence of these gases can cause local pressure to balance in systems, so that the environment of good gas flowing cannot be formed, on the other hand, these fixed gases are the most all the non-conductors of heat, with greater need for discharge, otherwise fixed gas can the group of being gathered into, make device normally to work.Solving this problem for this, this utility model can use one of following two kind technical scheme to solve:
The first solution: thin device of air is set at the fixed gas collection port of vaporizers at different levels, and the shell side of surface condenser is provided with the air vent that incoagulable gas is discharged system, to discharge these fixed gases, so can be just so that rich steam and incoagulable gas be discharged by thin device of air, form pulling of tail end, make whole system is formed between headend equipment and end pressure reduction, system configuration self-assembling formation, thus it is effectively formed the system of a unimpeded flowing, to support that device normally works；
The second solution: be provided with surface condenser in a device, the shell side of surface condenser is connected with the fixed gas collection port of final evaporator, the cooling medium inlet of the tube side of surface condenser and outlet dispose waste liquid delivery pump and pending waste liquid tank, final evaporator charging aperture are connected with waiing upon respectively, and the shell side of surface condenser is provided with and incoagulable gas is discharged system exhaust.The fixed gas collection port pipeline of the vaporizers at different levels in addition to final evaporator connects with the heater of rear stage vaporizer.Surface condenser is a kind of more special heat exchanger, it is passed through steam in its shell side, cooling medium is sent in tube side, cooling medium is usually water, but cooling medium used in this device is pending dilute waste liquid, and the gas of fixed gas collection port is condensed by residue vapor after heat exchange, forms condensed water and drain, fixed gas can be emptied by the air vent of the shell side of surface condenser simultaneously, discharges system.After being condensed due to steam, volume becomes geometry multiple to reduce, therefore, vacuum will be formed in systems, thus form pressure differential at each equipment, form pulling of tail end, whole system both can have been made to maintain normal duty, pending waste liquid can be made again tentatively to be heated simultaneously, in final evaporator, the condition providing favourable, the energy in acquisition system more fully, it is achieved the most energy-conservation purpose it is further processed for it.This utility model can also utilize the waste heat in system while reducing clear water consumption more fully so that system operation cost is reduced further.
In tradition MVR vapo(u)rization system, vapour compression machine is an autonomous device, and its admission end is in communication by indirect steam pipeline, and turbine apparatus needs to arrange an independent space, so that steam can heat up, pressurize.
In this utility model, only indirect steam exit at final evaporator arranges vapour compression machine, the indirect steam pull continuously that the most not only can produce at this grade of vaporizer, give first evaporator after intensification pressurization to use as thermal source, and this level can be produced swabbing action, then new indirect steam is had to produce, between vaporizers at different levels, form certain pressure difference value simultaneously, thus there is a possibility that prime vaporizer will seethe with excitement at a lower temperature, device of the present utility model so can be made only to need when initial work to one-level vaporizer provides a small amount of live steam, and solution is heated to boiling point, form the wallop persistently evaporated, set up an initial working environment easily；Arranging vapour compression machine in the indirect steam exit of final evaporator both can realize the suction to each prime vaporizer simultaneously, can avoid again at each prime vaporizer, arranging compressor again, the cost that reducing apparatus manufactures, this utility model make use of the structure space as turbine of vaporizer itself, vapour compression machine and final evaporator and prime vaporizer is made to be an organic assembling body, less indirect steam pipeline and the usage amount of vapour compression machine, the pipeline of steam and structural damping can be made again to be greatly reduced, both compression efficiency can have been made to be improved, less energy loss, the cost of whole device and operating cost can be made again to be substantially reduced.
In one embodiment of the MVR vaporising device that this utility model is stated, vapor inlet port at first evaporator is provided with a steam vacuum tank, this structure can ensure that the steam pressure entering into one-level vaporizer is in the state that comparison is steady, equalize, in order to avoid avoiding because of the influence of fluctuations device even running of pressure in system.
In one specific embodiment of MVR multi-stage evaporation unit of the present utility model, the tube side outlet of its surface condenser by the first threeway with two branch roads connect the first threeway respectively feed pipe with pending waste liquid tank and vaporizer shell side connect, and on two branch road of the first threeway, be respectively arranged with waste reflux control valve and evaporate feed control valve.Setting the return valve when feed valve opening to close when device works, utilize Valve controlling logic realization feed preferential, clout refluxes.In the MVR vaporising device embodiment that this utility model is stated, the material liquid outlet of vaporizers at different levels can also connect second threeway, the another two branch road of the second threeway is respectively communicated with evaporation feed and controls valve and the input port of circulating pump, the liquid outlet of circulating pump and a 3rd threeway connection, two other branch road of 3rd threeway is respectively communicated with the material liquid outlet of the vaporizer of previous stage and the circulation fluid entrance of this grade of vaporizer, and on the branch road of the material liquid outlet of the vaporizer of connection previous stage, it is provided with the feed control valve of previous stage vaporizer, to circulating pump liquid outlet and the 4th threeway connection of first evaporator feed flow, two branch roads of the 4th threeway are respectively communicated with the circulation fluid entrance of dense waste liquid tank and first evaporator.The control to duty can be realized by the valve controlling to be respectively provided with on each threeway branch road after using aforesaid structure.Such as: setting the return valve when feed valve opening and close, utilize Valve controlling logic realization feed preferential, clout refluxes.Such structure can make structure the simplest while realizing this utility model purpose.
Traditional MVR vaporizer is when normal startup work, owing to being a single unit, uses vapour compression machine to utilize mechanical work to be used as to evaporate thermal source by being sent to again therein after the indirect steam produced in equipment of itself intensification, pressurization.That is: need to be processed into the distillation condensed water of quantity, then be accomplished by how many by the quantity of steam of vapour compression machine.Device of the present utility model at least includes the vaporizer that two-stage series connection is distributed, the thermal source of rear stage vaporizer uses previous stage equipment to concentrate the indirect steam produced, the indirect steam that afterbody vaporizer produces enters vapour compression machine and heats up, delivers to vaporizer foremost after pressurization, and such multi-stage evaporator will automatically form different pressure reduction, the system of the different temperature difference and normal, continuous service work.Theoretically: when using double effect evaporator, vapour compression machine needs amount to be processed to be 1/2nd of traditional single unit MVR vaporizer；N/mono-that when using n level vaporizer, vapour compression machine needs amount to be processed to be traditional single unit MVR vaporizer.Obviously, multistage configuration mode energy-saving effect of the present utility model is considerable.But it practice, the increase along with vaporizer progression is increased by the temperature difference that multistage evaporation needs vapour compression machine to be realized rising, compression efficiency also will decrease, and be generally disposed at two to level Four and be advisable.An embodiment of the present utility model is i.e. in series by secondary evaporimeter.
This utility model system can use intelligent DCS control system, and the closedown of valve, the unlatching of pump are completed by preset program, have liberated productivity ratio, have improve work efficiency.Due to the negligible amounts such as equipment, valve in this utility model, so controlling unit is less, automatic controlling level is high.
Advantage of the present utility model is as follows:
1) evaporation efficiency can be improved to greatest extent；
2) system capacity can be made full use of, farthest reduce energy consumption, the suitability increasing system and manufacturability；
3) whole system simple in construction, low cost of manufacture, and can be that Automated condtrol provides convenient；
4) whole system can even running；
4) using pending waste liquid to use as cooling medium, make use of system warm-up well, decrease the consumption of industry clear water, also eliminate the construction of cooling tower systems, investment intensity greatly reduces, and also can save the land resource of preciousness simultaneously.
This utility model can maximally utilise system capacity as can be seen here, saves energy consumption, substantially increases the suitability and the manufacturability of MVR vapo(u)rization system, be one and realize resource recycling, the more effectively means of industrial waste zero-emission.
Accompanying drawing explanation
Accompanying drawing 1 uses the schematic diagram of double effect evaporator arranged in series embodiment for this utility model.
nullIn figure: 1 is waste collection pipeline，2 is dense waste liquid tank，3 is dense waste liquid delivery pump，4 is dilute waste liquid tank，5 is dilute waste liquid delivery pump，6 is waste reflux pipe，7 is condensate draining，8 is condensed water delivery pump，9 is condensation water collection pump，10 is surface condenser condensate water pot，11 is surface condenser condensate water pot flash steam interface，12 is surface condenser，13 is surface condenser evacuation port，14 is temperature sewer pipe，15 control valve for waste reflux，16 control valve for evaporation feed，17 is secondary evaporimeter circulating pump，18 is secondary evaporimeter，19 is secondary evaporimeter condensating water outlet tube，20 is secondary evaporimeter condensate water pot，21 is secondary evaporimeter condensate water pot flash steam interface，22 is secondary evaporimeter condensate water pot outlet pipe，23 is vapour compression machine，24 is one-level vaporizer secondary steam pipe，25 is one-level vaporizer，26 control valve for one-level evaporation feed liquor，27 is one-level vaporizer circulating pump，28 is one-level evaporator condensation water outlet pipe，29 is dense waste liquid discharging control valve door，30 is one-level evaporator condensation tank line，31 is one-level evaporator condensation water pot，32 is vapour compression machine outlet，33 is steam vacuum tank，34 control valve for live steam，35 is live steam steam supply pipe，36 is one-level evaporator condensation water pot flash steam interface，37 is one-level vaporizer fixed gas outlet，38 is secondary evaporimeter fixed gas outlet，39 is dilute waste liquid feeder sleeve，40 is the first threeway，41 is the second threeway on the vaporizer of the second level，42 is the 3rd threeway，43 is the second threeway on first evaporator，44 is the 4th threeway.
Detailed description of the invention
This utility model combines accompanying drawing, explains orally with the MVR system that two-stage series connection is arranged for embodiment.
The present embodiment uses two the MVR vaporizers being serially connected, i.e. one-level vaporizer 25 and secondary evaporimeter 18.Arranging a steam vacuum tank 33 on the live steam steam supply pipe 35 of vapour source connection, the steam (vapor) outlet of steam vacuum tank 33 connects with the steam inlet of one-level vaporizer 25.The secondary steam pipe 24 of one-level vaporizer 25 and not condensing collection port 37 respectively with secondary evaporimeter 18 steam inlet connect.The not condensing collection port 38 of secondary evaporimeter 18 is connected with the shell side of surface condenser 12.The cooling medium inlet 39 of the tube side of surface condenser 12 and outlet 14 respectively with wait upon the outlet processing the waste liquid delivery pump 5 connecting pending dilute waste liquid tank and connect the waste reflux pipe 6 of pending waste liquid tank 4 and connect.The cooling medium outlet 14 of the tube side of surface condenser 12 is connected to first threeway 40, in the another two branch road of the first threeway 40, branch road 6 connects with waste liquid tank 4, another branch road then connects a branch road of the second threeway 41, and pipe 6 be respectively arranged with waste reflux on the branch road connecting the second threeway and control valve 15 and evaporation feed controls valve 16.The top of the condensate water pot flash steam interface 11 communicating surface condenser condensate water pot 10 of surface condenser 12, the water inlet of the condensation-water drain rearmounted condensate water pot of communicating surface condenser 10 of surface condenser 12, the outlet of condensate water pot 10 is connected with condensate draining 7 by condensation water collection pump 9, or directly connects with the unit using clean cold water.Second threeway 41 another two branch road connects with the material liquid outlet of two grades of (i.e. the final stage of the present embodiment) vaporizers 18 and the entrance to the circulating pump 17 of secondary evaporimeter 18 feed flow respectively.One of them branch road of connection liquid outlet connection the 3rd threeway 42 of circulating pump 17, the feed liquid port of entrance and secondary evaporimeter that two other branch road of the 3rd threeway 42 controls valve 26 with one-level evaporation feed liquor respectively connects.Control 43 1 branch roads of second the second threeway of the outlet of valve 26.The another two branch road of second the second threeway 43 connects with the material liquid outlet of one-level vaporizer 25 and the entrance to the circulating pump 27 of one-level vaporizer 25 feed flow respectively with another two branch road respectively.The outlet of circulating pump 27 connects with a branch road of the 4th threeway 44.Two other branch road of 4th threeway 44 connects with the feed liquid port of one-level vaporizer and the entrance connection of dense waste liquid discharging control valve door 29 after treated concentration respectively.The outlet of dense waste liquid discharging control valve door 29 connects with dense waste liquid tank.In the present embodiment, condensate water pot 20 and 31 it is each provided with respectively after firsts and seconds vaporizer, wherein: the inlet of one-level condensate water pot 31 is connected with the condensating water outlet tube of one-level vaporizer by pipeline 28, the liquid outlet of one-level condensate water pot 31 is connected by pipeline 30 with the inlet of B-grade condensation water pot 20, and the flash steam outlet of one-level condensate water pot 31 is connected by the steam inlet of pipe 36 with steam vacuum tank 33；The inlet of B-grade condensation water pot 20 connects with the condensating water outlet tube of secondary evaporimeter also by pipeline, the flash steam outlet of B-grade condensation water pot 20 is connected with the heating steam inlet of secondary evaporimeter by pipe 21, and the condensed fluid outlet of B-grade condensation water pot 20 is connected by the inlet of the rearmounted condensate water pot of pipe 22 and surface condenser 10.In the device of the present embodiment, only indirect steam exit at secondary evaporimeter 18 arranges vapour compression machine 23.It is provided with dense waste liquid rear pump 3 on the dense waste liquid tank 2 after concentrated process in the device of the present embodiment, the waste collection pipeline 1 for pending waste liquid it is provided with on pending dilute waste liquid tank 4, the condensed water delivery pump 8 of output condensed water it is provided with on condensed water handle 7, the cooling medium exit of the tube side of surface condenser is provided with gas-liquid separation device and gas exhauster, but these devices do not show in the accompanying drawings.
When vaporizer of the present utility model is more than two-stage, the vaporizer of requirement can be set up at final stage and an inter-stage, in its mutual pipeline connecting mode and previous embodiment two grades and the connecting mode between one-level vaporizer are identical, between each vaporizer, namely add corresponding second threeway and the 3rd threeway, and corresponding condensate water pot.
During the above-mentioned two grades of MVR vaporising devices work of this utility model, first will focus on waste collection pipeline 1, be stored in dilute waste liquid tank 4.Waiing upon in dilute waste liquid tank 4 is disposed waste liquid and is first in the tube side of surface condenser by dilute waste liquid feeder sleeve 39 by dilute waste liquid delivery pump 5, and after heat exchange, dilute waste liquid is heated, temperature sewer pipe 14 discharge.On temperature sewer pipe 14 by the first threeway with pipeline respectively feed pipe with pending waste liquid tank and final evaporator shell side connect, and on two branch road of threeway, be respectively arranged with waste reflux control valve 15 and evaporation feed control valve 16.Closed 15 by DCS program setting return valve when feed valve 16 is opened, utilize Valve controlling logic realization feed preferential, it is ensured that system evaporation materials, clout refluxes.Waste liquid is transported to surface condenser 12 by the dilutest waste liquid delivery pump 5, as cooling medium, residue vapor in system and incoagulable gas is cooled down, and dilute waste liquid is tentatively heated, and ensure that the effective pressure reduction between system equipment and the temperature difference simultaneously.Dilute waste liquid is controlled valve 15 by waste reflux after surface condenser 12 is discharged and evaporation feed controls valve 16 and jointly realizes logic control, and a part of waste liquid enters in secondary evaporimeter 18 after evaporation feed controls valve 16；And another part waste liquid is back in dilute waste liquid tank 4 after waste reflux controls valve 15, setting the return valve when feed valve opening and close, utilize Valve controlling logic can realize feed preferential, clout refluxes.Thus achieve the cooling medium utilizing dilute waste liquid to be used as surface condenser 12, thus decrease the consumption to clear water, the remaining preheating taking full advantage of in system so that system operation cost is reduced further.Open secondary evaporimeter circulating pump 17, waste liquid in secondary evaporimeter 18 housing is discharged by the circulation fluid discharging opening of bottom, enter into secondary evaporimeter circulating pump 17, in dilute waste liquid is again fed to secondary evaporimeter dilute, and waste liquid top is evenly distributed on each heat exchange element surface of secondary evaporimeter 18, so, waste liquid just constantly circulates in secondary evaporimeter 18, continuous heating, until boiling.Open one-level evaporation feed liquor and control valve 26,26 control valve for one-level evaporation feed liquor, outlet with secondary evaporimeter circulating pump 17, when needing charging in one-level evaporator shell, opening one-level evaporation feed liquor and control valve 26, waste liquid is entered in one-level vaporizer 25 by secondary evaporimeter 18.Waste liquid is entered in one-level vaporizer 25 by secondary evaporimeter 18, opens one-level vaporizer circulating pump 27, waste liquid is evenly distributed on each heat exchange element surface of one-level vaporizer 25.nullOpen live steam and control valve 34，Live steam from boiler passes through in the heater that live steam steam supply pipe 35 enters into one-level vaporizer 25，Live steam and waste liquid persistently produce heat exchange on heat exchange element surface by the Circulation of one-level vaporizer circulating pump 27，Waste liquid is constantly heated，Thus arrive boiling point and produce indirect steam，In one-level vaporizer secondary steam pipe 24 enters into the heater of secondary evaporimeter 18，Heat exchange is persistently produced on heat exchange element surface by the Circulation of secondary evaporimeter circulating pump 17 with dilute waste liquid，Dilute waste liquid is constantly heated，Same arrival boiling point also produces indirect steam，Open the driving motor of vapour compression machine 23，Simultaneously close off live steam and control valve 34，Vapour compression machine 23 will utilize mechanical work for compensating，Consume mechanical energy，Reverse Carnot cycle mode is utilized to work，Absorb heat from low temperature environment around，It is increased to the temperature and pressure value coming from secondary evaporimeter 18 indirect steam set requirement，Returned by vapour compression machine outlet 32 in the heat exchanger of one-level vaporizer 25，Heat exchange is fully occurred to undergo phase transition with the liquid film on heat exchange element surface，Become condensed water.The evaporation heat source stream of this rear stage vaporizer 25 comes from vapour compression machine 23；The evaporation thermal source of secondary evaporimeter 18 comes from the indirect steam that one-level vaporizer 25 produces.In this utility model, 37 is the incoagulable gas outlet of one-level vaporizer, connects with the steam inlet of next stage vaporizer, can guarantee that its interior incoagulable gas and residual gas are discharged in time, can give the heat exchange environment that evaporation process one is continual and steady.And final evaporator incoagulable gas outlet 38 with surface condenser together with, condensed water is formed after the some vapor being entrained in incoagulable gas is cooled, incoagulable gas is emptied by surface condenser, the incoagulable gas in system, air etc. is made persistently to discharge, stablize heat exchange, form effective evaporating pressure and thermograde.During work, system residual steam and incoagulable gas enter in surface condenser 12 by secondary evaporimeter fixed gas outlet 38, cooled down by dilute waste liquid, incoagulable gas and air are discharged by surface condenser evacuation port 13, system automatically forms system pressure and temperature gap under the power drive of vapour compression machine and the cooling of surface condenser act on jointly, holding is stablized lasting evaporation, forms continuously evaporation process.
Open dense waste liquid discharging control valve door 29 when waste liquid is by evaporation and concentration to finite concentration, dense waste liquid, thereby into scrapping 1 storage in liquid bath, reclaims utility therein and is recycled.
The condensed water that one-level vaporizer 25 produces is entered in one-level evaporator condensation water pot 31 by one-level evaporator condensation water outlet pipe 28；The condensed water that secondary evaporimeter 18 produces is entered in secondary evaporimeter condensate water pot 20 by secondary evaporimeter condensating water outlet tube 19；The condensed water that surface condenser 12 produces connects other condensed waters and is entered in surface condenser condensate water pot 10 by pipeline in the lump, is delivered to condensate draining 7 by condensation water collection pump 9 and stores reuse.So whole system is achieved that the design object of low energy consumption, zero-emission.
In this utility model, vapour compression machine 23 is nested in the indirect steam outlet end of secondary evaporimeter 18, utilize the structure space place as vapour compression machine turbine of vaporizer itself, i.e., vapour compression machine 23 and secondary evaporimeter 18 are an organic assembling body, less indirect steam pipeline and the housing of vapour compression machine, pipeline and the structural damping of steam are greatly reduced so that compression efficiency is improved, less energy loss.
One branch road of threeway 42 and the outlet of secondary evaporimeter circulating pump 17, when closing feed control valve 26, secondary evaporimeter circulating pump 17 process in pending liquid being sent into secondary evaporimeter 18.When needing charging in one-level evaporator shell, open one-level evaporation feed liquor and control valve 26, waste liquid can enter in one-level vaporizer 25 by secondary evaporimeter 18, process in the secondary evaporimeter 18 evaporation and concentrating waste liquid to a certain extent housing thereby into one-level vaporizer, and evaporated by systems stay, waste liquid in one-level vaporizer 25 opens discharging control valve door 29 after being concentrated to predetermined concentration, can be entered by dense waste liquid in dense waste liquid tank 2, to treat post processing.
The evaporator of plural serial stage in this utility model, improves evaporation efficiency to greatest extent, farthest reduces energy consumption, the suitability increasing system and manufacturability.Simultaneously, pending waste liquid is used to use as cooling medium, make use of system warm-up well, decrease the consumption of industry clear water, also eliminating the construction of cooling tower systems, investment intensity greatly reduces, and also saves the land resource of preciousness, it is one and realizes resource recycling, the effective means of industrial waste zero-emission.
Claims (9)
1. a MVR multi-stage evaporation unit, including: vaporizer, compressor, condensate water pot, reservoir, provide the pipeline between the initial pipeline of steam, indirect steam pipeline, connection vaporizer and fluid reservoir and between each fluid reservoir for vaporizer, and valve and pump, it is characterised in that at least use two evaporators being serially connected.
MVR multi-stage evaporation unit the most according to claim 1, it is characterized in that vaporizer at different levels respectively configures corresponding condensate water pot and circulating pump, the indirect steam outlet of each previous stage vaporizer shell side connects with the steam inlet of rear stage evaporator heater, in vaporizer indirect steam exit, vapour compression machine is set, the steam (vapor) outlet of vapour compression machine connects with the heater of previous stage vaporizer, evaporator condensation water outlet pipes at different levels connect with corresponding condensate water pot, the circulation fluid outlet of vaporizers at different levels is connected with this grade of pump entry, circulating-pump outlets at different levels connect with the circulation fluid entrance of this grade of vaporizer, the live steam pipe connecting live steam source is also had at the vapor inlet port of first evaporator heater, it is provided with live steam on described live steam pipe and controls valve.
MVR multi-stage evaporation unit the most according to claim 2, it is characterised in that thin device of air is set at the fixed gas collection port of vaporizers at different levels, and the shell side of surface condenser is provided with the air vent that incoagulable gas is discharged system.
MVR multi-stage evaporation unit the most according to claim 2, it is characterized in that device is additionally provided with surface condenser, the shell side of surface condenser is connected with the fixed gas collection port of final evaporator, the cooling medium inlet of the tube side of surface condenser and outlet dispose waste liquid delivery pump and pending waste liquid tank, final evaporator charging aperture are connected with waiing upon respectively, and the shell side of surface condenser is provided with the air vent that incoagulable gas is discharged system, the fixed gas collection port pipeline of the vaporizers at different levels in addition to final evaporator connects with the heater of rear stage vaporizer.
MVR multi-stage evaporation unit the most according to claim 4, in described vaporising device, only indirect steam exit at final evaporator arranges vapour compression machine.
MVR multi-stage evaporation unit the most according to claim 5, it is characterised in that the vapor inlet port of first evaporator is provided with a steam vacuum tank.
MVR multi-stage evaporation unit the most according to claim 6, it is characterized in that the tube side outlet of surface condenser by the first threeway with two branch roads connect the first threeway respectively feed pipe with pending waste liquid tank and vaporizer shell side connect, and on two branch road of the first threeway, be respectively arranged with waste reflux control valve and evaporate feed control valve.
MVR multi-stage evaporation unit the most according to claim 7, it is characterized in that material liquid outlet one second threeway of connection of vaporizer at different levels, the another two branch road of the second threeway is respectively communicated with evaporation feed and controls valve and the input port of circulating pump, the liquid outlet of circulating pump and a 3rd threeway connection, two other branch road of 3rd threeway is respectively communicated with the material liquid outlet of the vaporizer of previous stage and the circulation fluid entrance of this grade of vaporizer, and on the branch road of the material liquid outlet of the vaporizer of connection previous stage, it is provided with the feed control valve of previous stage vaporizer, to circulating pump liquid outlet and the 4th threeway connection of first evaporator feed flow, two branch roads of the 4th threeway are respectively communicated with the circulation fluid entrance of dense waste liquid tank and first evaporator.
MVR multi-stage evaporation unit the most according to claim 8, it is characterised in that be provided with double effect evaporator in device.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105536276A (en) * | 2016-02-05 | 2016-05-04 | 兰州节能环保工程有限责任公司 | MVR (Mechanical Vapor Recompression) multi-level evaporation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536276A (en) * | 2016-02-05 | 2016-05-04 | 兰州节能环保工程有限责任公司 | MVR (Mechanical Vapor Recompression) multi-level evaporation device |
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Granted publication date: 20161130 Termination date: 20180205 |