CN105536276A - MVR (Mechanical Vapor Recompression) multi-level evaporation device - Google Patents
MVR (Mechanical Vapor Recompression) multi-level evaporation device Download PDFInfo
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- CN105536276A CN105536276A CN201610080259.0A CN201610080259A CN105536276A CN 105536276 A CN105536276 A CN 105536276A CN 201610080259 A CN201610080259 A CN 201610080259A CN 105536276 A CN105536276 A CN 105536276A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/26—Multiple-effect evaporating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/28—Evaporating with vapour compression
- B01D1/2803—Special features relating to the vapour to be compressed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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Abstract
The invention discloses an MVR (Mechanical Vapor Recompression) multi-level evaporation device which at least adopts two evaporators mutually connected in series and is capable of achieving a quite considerable energy-saving effect by virtue of a multi-level configuration mode. A to-be-treated waste liquid is directly adopted as a cooling medium, a vapor compressor is arranged at a secondary vapor outlet of the final evaporator, the vapor compressor, the final evaporator and the front evaporator are combined into an organic combination body, a secondary vapor pipeline and a secondary vapor compressor are omitted, and the pipeline and structure damping for vapor is greatly reduced, so that the compression efficiency is improved, energy losses are reduced, and the cost and operating cost of the whole device can be greatly lowered.
Description
Technical field
The present invention relates to a kind of MVR vaporising device, particularly a kind of MVR vaporising device be made up of multi-stage evaporator.
Background technology
In order to solve the use water shortage of some regions, ensure the normal life of people and promote industry keeps development need, China divides several stage to implement huge diversion works, employ a large amount of manpower and materials, but still fundamentally do not solve the fact of China's freshwater resources skewness and short water supply.Simultaneously in China, the industries such as electric power, coal and oil are discharging the trade effluent of flood tide every day to rivers,lakes and seas, cyclic utilization rate is not high, cause waste and the environmental pollution to a certain extent of limited water resources.Therefore the contradiction that water scarcity and utilization rate are not high and environmental pollution pressure are still a comparatively severe problem within following one period.Life and trade effluent being taken appropriate measures and administer Posterior circle utilization, and reclaim working substance wherein, is a kind of effective means improving living environment, solution water difficulty.
In current various sewage water treatment method, operating cost is minimum, technical merit is the highest, the most significant method of regulation effect still adopts the way of distillation.Its principle utilizes multistage evaporation equipment to form different pressure reduction and the temperature difference, makes sewage all can produce boiling phenomenon at different temperatures, and after generating steam, cooling forms distilled water.Sewage is constantly concentrated, and is finally condensed to the high-concentration waste liquid of minute quantity, and then recovery utility is used wherein.
MVR evaporimeter, as a kind of novel evaporation equipment, owing to having obvious energy conservation and consumption reduction effects, and the advantage such as integrated height, floor space are little, control system is simple, cost of investment is low, is widely used in evaporation equipment system.But along with China saves energy and reduce the cost the extensive enforcement of quantitative measure, in the middle of actual use procedure, traditional MVR vapo(u)rization system is realizing encountering technical bottleneck in face of energy-saving and cost-reducing object further.Meanwhile, MVR vapo(u)rization system is only an evaporation element, and the shortcoming that Technological adaptability is not high in actual use also fully exposes, and needs to use other system to assist, otherwise, needs cannot be used by complete independently.Therefore single MVR evaporimeter is in existing MVR vaporising device.
Summary of the invention
The invention provides a kind of MVR vaporising device overcoming prior art deficiency, particularly a kind of MVR vaporising device be made up of multi-stage evaporator.
MVR vaporising device of the present invention comprises: evaporimeter, compressor, condensate water pot, reservoir, to provide the pipeline of initial steam, indirect steam pipeline, be communicated with pipeline between evaporimeter and fluid reservoir and between each fluid reservoir for evaporimeter, and valve and pump, in MVR vaporising device of the present invention, at least adopt the MVR evaporimeters of two series connection mutually.Adopt this structure can improve evaporation efficiency to greatest extent, farthest reduce energy consumption, the applicability increasing system and manufacturability.
The precondition of equipment heat exchange there is certain temperature difference between the two, the formation system temperature difference, pressure reduction, if indirect steam will be back to self or more previous stage equipment, the temperature and pressure of indirect steam must be improved, it is arrange vapour compression machine in the indirect steam exit of rear stage evaporimeter that the present invention solves indirect steam for the method for self thermal source (or more previous stage) this problem, utilize vapour compression machine to the compression of indirect steam, improve its temperature and pressure, its concrete mode is for respectively to configure corresponding condensate water pot and circulating pump at evaporimeter at different levels, the indirect steam outlet of each previous stage evaporimeter shell side is communicated with the steam inlet of rear stage evaporator heater, in evaporimeter indirect steam exit, vapour compression machine is set, the steam (vapor) outlet of vapour compression machine is communicated with the heater of previous stage evaporimeter, evaporator condensation water outlet pipe at different levels is communicated with corresponding condensate water pot, the circulation fluid outlet of evaporimeter at different levels is connected with pump entry at the corresponding levels, circulating-pump outlet at different levels is communicated with the circulation fluid entrance of evaporimeter at the corresponding levels, the live steam pipe being communicated with live steam source is also had at the vapor inlet port place of first evaporator heater, described live steam pipe is provided with live steam by-pass valve control.This structure of the present invention is when initial operation, the pending waste liquid in first evaporator is heated by live steam, thus generation indirect steam, be sent to the heating clamber of rear stage evaporimeter as thermal source, the indirect steam of final stage is sent into first evaporator and is used for adding in hot heater after vapour compression machine intensification, pressurization, pending waste liquid is carried out evaporation process, can close live steam supply after System steam compressor, the indirect steam utilizing evaporimeter at different levels to produce is to the heat supply of rear stage evaporimeter.So just can maximally utilise system capacity, save energy consumption.Like this after initial state terminates, just can reoffer power steam without the need to the external world, device is worked under lowest energy consumption condition.
Due in device of the present invention, the initial driving force of its evaporation comes from heat source stream, inevitably carry the incoagulable gas such as some air secretly in heat source stream, also must have the residue vapor of part end condensation, the existence of these gases can cause local pressure to balance in systems in which simultaneously, so that the environment of good gas flowing cannot be formed, on the other hand, these fixed gases are also all the non-conductors of heat, more need to discharge, otherwise fixed gas can the group of being gathered into, and makes device normally work.For this addresses this problem, the present invention can adopt one of two kinds of following technical schemes to solve:
The first solution: collect mouth place at the fixed gas of evaporimeter at different levels and thin device of air is set, and the shell side of surface condenser is provided with the exhaust outlet of incoagulable gas being discharged system, to discharge these fixed gases, like this can just to make rich steam and incoagulable gas discharge by dredging device of air, form pulling of tail end, make to form pressure reduction between headend equipment and end in whole system, system configuration self-assembling formation, thus effectively form the system of a unimpeded flowing, normally work with supportive device;
The second solution: be provided with surface condenser in a device, the shell side of surface condenser and the fixed gas of final evaporator are collected mouth and are connected, the cooling medium inlet of the tube side of surface condenser and outlet respectively with wait upon the delivery pump that disposes waste liquid and be connected with pending waste liquid tank, final evaporator charging aperture, and the shell side of surface condenser is provided with incoagulable gas is discharged system exhaust.The fixed gas of the evaporimeters at different levels except final evaporator is collected mouth pipeline and is communicated with the heater of rear stage evaporimeter.Surface condenser is a kind of more special heat exchanger, steam is passed in its shell side, cooling medium is sent in tube side, cooling medium is generally water, but cooling medium used in this device is pending rare waste liquid, the gas that fixed gas collects mouth is condensed by residue vapor after heat exchange, forms condensed water and drains, fixed gas is emptying by the exhaust outlet of the shell side of surface condenser simultaneously, discharges system.Due to steam be condensed after volume become geometry multiple to reduce, therefore, vacuum will be formed in systems in which, thus poor at each equipment mineralization pressure, 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, there is provided favourable condition for it is further processed in final evaporator, the energy in acquisition system more fully, realize more energy-conservation object.The present invention can also utilize the waste heat in system more fully while reducing clear water consumption, and system operation cost is reduced further.
In traditional MVR vapo(u)rization system, vapour compression machine is an autonomous device, and its admission end is communicated with it by indirect steam pipeline, and turbine apparatus needs to arrange an independently space, heats up, pressurizes to enable steam.
Indirect steam exit only at final evaporator in the present invention arranges vapour compression machine, the indirect steam pull continuously that so not only can produce at evaporimeter at the corresponding levels, give first evaporator after intensification pressurization to use as thermal source, and swabbing action can be produced to the corresponding levels, then new indirect steam is had to produce, between evaporimeter at different levels, form certain pressure difference value simultaneously, so just likely prime evaporimeter will be seethed with excitement at a lower temperature, the live steam that device of the present invention so can be made when initial work to simply need to one-level evaporimeter provide a small amount of, and solution is heated to boiling point, form the wallop continuing evaporation, set up an initial working environment easily, the suction that vapour compression machine both can realize each prime evaporimeter is set in the indirect steam exit of final evaporator simultaneously, can avoid again arranging compressor at each prime evaporimeter place again, the cost that reducing apparatus manufactures, the space of structure as turbine of evaporimeter itself is make use of in the present invention, vapour compression machine and final evaporator and prime evaporimeter is made to be an organic assembling body, the less use amount of indirect steam pipeline and vapour compression machine, the pipeline of steam and structural damping can be made again greatly to reduce, 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 greatly to reduce.
In the MVR vaporising device that the present invention states embodiment, the vapor inlet port of first evaporator is provided with a steam vacuum tank, this structure can ensure that the steam pressure entering into one-level evaporimeter is in more steady, balanced state, in order to avoid avoid the influence of fluctuations device even running because of pressure in system.
In a specific embodiment of MVR multi-stage evaporation unit of the present invention, the tube side outlet of its surface condenser is communicated with the feed pipe of pending waste liquid tank with evaporimeter shell side with two branch roads being communicated with the first threeway respectively by the first threeway, and on two branch roads of the first threeway, be respectively arranged with waste reflux by-pass valve control and evaporation feed by-pass valve control.When device works, setting return valve when feed valve opening is closed, and utilize Valve controlling logic realization feed preferential, clout refluxes.In the MVR vaporising device embodiment that the present invention states, the material liquid outlet of evaporimeter at different levels can also be communicated with second threeway, another two branch roads of the second threeway are communicated with the input port of evaporation feed by-pass valve control and circulating pump respectively, the liquid outlet of circulating pump is communicated with the 3rd threeway, two other branch road of 3rd threeway is communicated with the material liquid outlet of the evaporimeter of previous stage and the circulation fluid entrance of evaporimeter at the corresponding levels respectively, and on the branch road of the material liquid outlet of the evaporimeter of connection previous stage, be provided with the inlet control valve door of previous stage evaporimeter, circulating pump liquid outlet to first evaporator feed flow is communicated with the 4th threeway, two branch roads of the 4th threeway are communicated with the circulation fluid entrance of dense waste liquid tank and first evaporator respectively.Valve by controlling each threeway branch road is arranged respectively after adopting aforesaid structure realizes the control to duty.Such as: setting return valve when feed valve opening is closed, and utilize Valve controlling logic realization feed preferential, clout refluxes.Such structure can make structure the simplest while realizing the object of the invention.
Traditional MVR evaporimeter, when normal startup work, owing to being a single unit, uses vapour compression machine to utilize mechanical work to be used as evaporation thermal source by being sent to again therein after the indirect steam produced in equipment of itself intensification, pressurization.That is: need the distillation condensed water being processed into quantity, so just need how many by the quantity of steam of vapour compression machine.Device of the present invention at least comprises the evaporimeter of two-stage series connection distribution, the thermal source of rear stage evaporimeter uses previous stage equipment to concentrate the indirect steam of generation, the indirect steam that afterbody evaporimeter produces enters that vapour compression machine heats up, deliver to evaporimeter foremost after pressurization, and such multi-stage evaporator will form a different pressure reduction, the system of the different temperature difference and normal, continuous service work automatically.Theoretically: during use double effect evaporator, vapour compression machine needs amount to be processed be 1/2nd of tradition single unit MVR evaporimeter; During use n level evaporimeter, vapour compression machine needs n/mono-that amount to be processed is tradition single unit MVR evaporimeter.Obviously, multistage configuration mode energy-saving effect of the present invention is considerable.But in fact, multistage evaporation need vapour compression machine realize rise the temperature difference increase along with evaporimeter progression is increased, compression efficiency also will decrease, and generally be configured in two to level Four and be advisable.Namely one embodiment of the present of invention are in series by secondary evaporimeter.
Present system can adopt intelligent DCS control system, and the closedown of valve, the unlatching of pump complete by initialize program, have liberated productivity ratio, have improve operating efficiency.Due to the negligible amounts such as equipment, valve in the present invention, so controlling unit is less, automatic controlling level is high.
Advantage of the present invention is as follows:
1) evaporation efficiency can be improved to greatest extent;
2) can system capacity be made full use of, farthest reduce energy consumption, the applicability increasing system and manufacturability;
3) whole system structure is simple, low cost of manufacture, and can be Automated condtrol and provide convenient;
4) whole system can even running;
4) adopt pending waste liquid to use as cooling medium, make use of system warm-up well, decrease the consumption of industrial clear water, also eliminate the construction of cooling tower systems, investment intensity greatly reduces, and also can save valuable land resource simultaneously.
The present invention can maximally utilise system capacity as can be seen here, saves energy consumption, substantially increases applicability and the manufacturability of MVR vapo(u)rization system, be one and realize resource recycling, the more effective means of industrial waste zero-emission.
Accompanying drawing explanation
Accompanying drawing 1 adopts the schematic diagram of double effect evaporator arranged in series embodiment for the present invention.
In figure: 1 is waste collection pipeline, 2 is dense waste liquid tank, 3 is dense waste liquid delivery pump, 4 is rare waste liquid tank, 5 is rare 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 warm sewer pipe, 15 is waste reflux by-pass valve control, 16 is evaporation feed by-pass valve control, 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 evaporimeter secondary steam pipe, 25 is one-level evaporimeter, 26 is one-level evaporation feed liquor by-pass valve control, 27 is one-level evaporimeter 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 is live steam by-pass valve control, 35 is live steam steam supply pipe, 36 is one-level evaporator condensation water pot flash steam interface, 37 is one-level evaporimeter fixed gas outlet, 38 is secondary evaporimeter fixed gas outlet, 39 is rare waste liquid feeder sleeve, 40 is the first threeway, 41 is the second threeway on the evaporimeter 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
By reference to the accompanying drawings, the MVR system of arranging with two-stage series connection explains orally for embodiment in the present invention.
Two MVR evaporimeters of series connection are mutually adopted, i.e. one-level evaporimeter 25 and secondary evaporimeter 18 in the present embodiment.The live steam steam supply pipe 35 that vapour source is communicated with arranges a steam vacuum tank 33, and the steam (vapor) outlet of steam vacuum tank 33 is communicated with the steam inlet of one-level evaporimeter 25.The secondary steam pipe 24 of one-level evaporimeter 25 and not condensing collect mouth 37 respectively with secondary evaporimeter 18 steam inlet be communicated with.The not condensing of secondary evaporimeter 18 is collected mouth 38 and 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 being communicated with pending rare waste liquid tank and be communicated with the waste reflux pipe 6 being communicated with pending waste liquid tank 4.The cooling medium outlet 14 of the tube side of surface condenser 12 is connected to first threeway 40, the branch road that in another two branch roads of the first threeway 40, branch road 6 is communicated with waste liquid tank 4, another branch road then connects the second threeway 41, and pipe 6 with the branch road being communicated with the second threeway is respectively arranged with waste reflux by-pass valve control 15 and evaporation feed by-pass valve control 16.The top of the condensate water pot flash steam interface 11 communicating surface condenser condenses water pot 10 of surface condenser 12, the water inlet of the rearmounted condensate water pot 10 of condensation-water drain communicating surface condenser of surface condenser 12, the delivery port of condensate water pot 10 is communicated with condensate draining 7 by condensation water collection pump 9, or is directly communicated with using the unit of clean cold water.Another two branch roads of second threeway 41 are communicated with the entrance of the circulating pump 17 giving secondary evaporimeter 18 feed flow with the material liquid outlet of secondary (i.e. the final stage of the present embodiment) evaporimeter 18 respectively.The connection liquid outlet of circulating pump 17 is communicated with one of them branch road of the 3rd threeway 42, and two other branch road of the 3rd threeway 42 is communicated with the feed liquid port of secondary evaporimeter with the entrance of one-level evaporation feed liquor by-pass valve control 26 respectively.Second the second threeway, 43 1 branch roads of the outlet of by-pass valve control 26.Another two branch roads of second the second threeway 43 are communicated with the entrance of the circulating pump 27 giving one-level evaporimeter 25 feed flow with the material liquid outlet of one-level evaporimeter 25 respectively with another two branch roads respectively.The outlet of circulating pump 27 is communicated with a branch road of the 4th threeway 44.Two other branch road of 4th threeway 44 respectively treated with the feed liquid port connected sum of one-level evaporimeter concentrated after the entrance of dense waste liquid discharging control valve door 29 be communicated with.The outlet of dense waste liquid discharging control valve door 29 is communicated with dense waste liquid tank.In the present embodiment, condensate water pot 20 and 31 is respectively provided with respectively after firsts and seconds evaporimeter, wherein: the inlet of one-level condensate water pot 31 is communicated with the condensating water outlet tube of one-level evaporimeter by pipeline 28, the liquid outlet of one-level condensate water pot 31 is communicated with 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 communicated with by the steam inlet of pipe 36 with steam vacuum tank 33; The inlet of B-grade condensation water pot 20 is also communicated with the condensating water outlet tube of secondary evaporimeter by pipeline, the flash steam outlet of B-grade condensation water pot 20 is communicated with the heating steam inlet of secondary evaporimeter by pipe 21, and the condensed fluid outlet of B-grade condensation water pot 20 is communicated with by the inlet of the rearmounted condensate water pot 10 of pipe 22 and surface condenser.Indirect steam exit only at secondary evaporimeter 18 in the device of the present embodiment arranges vapour compression machine 23.The dense waste liquid tank 2 after concentration in the device of the present embodiment is provided with dense waste liquid rear pump 3, pending rare waste liquid tank 4 is provided with the waste collection pipeline 1 for pending waste liquid, condensed water handle 7 is provided with the condensed water delivery pump 8 exporting condensed water, 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 evaporimeter of the present invention is more than two-stage, the evaporimeter of requirement can be set up in final stage and an inter-stage, its mutual pipeline connecting mode is identical with the secondary in previous embodiment and the connecting mode between one-level evaporimeter, between each evaporimeter, namely add corresponding second threeway and the 3rd threeway, and corresponding condensate water pot.
The present invention above-mentioned secondary MVR vaporising device work time, first will focus on waste collection pipeline 1, be stored in rare waste liquid tank 4.Waiing upon in rare waste liquid tank 4 is disposed waste liquid and first to be entered in the tube side of surface condenser by rare waste liquid feeder sleeve 39 by rare waste liquid delivery pump 5, and after heat exchange, rare waste liquid is heated, and is discharged by warm sewer pipe 14.On warm sewer pipe, 14 are communicated with the feed pipe of pending waste liquid tank with final evaporator shell side with pipeline respectively by the first threeway, and on two branch roads of threeway, be respectively arranged with waste reflux by-pass valve control 15 and evaporation feed by-pass valve control 16.Close 15 by DCS program setting return valve when feed valve 16 is opened, utilize Valve controlling logic realization feed preferential, ensure system evaporation materials, clout refluxes.Then waste liquid is transported to surface condenser 12 by rare waste liquid delivery pump 5, and as cooling medium, by residue vapor in system and incoagulable gas cooling, rare waste liquid is tentatively heated, and ensure that the effective pressure reduction between system equipment and the temperature difference simultaneously.Rare waste liquid realizes logic control jointly by waste reflux by-pass valve control 15 and evaporation feed by-pass valve control 16 after discharging from surface condenser 12, and a part of waste liquid enters in secondary evaporimeter 18 after evaporation feed by-pass valve control 16; And another part waste liquid is back in rare waste liquid tank 4 after waste reflux by-pass valve control 15, setting return valve when feed valve opening is closed, and utilize Valve controlling logic can realize feed preferential, clout refluxes.So just achieve the cooling medium utilizing rare waste liquid to be used as surface condenser 12, thus decrease consumption to clear water, take full advantage of in system more than preheating, 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, rare waste liquid is sent in secondary evaporimeter rare again, and waste liquid top is evenly distributed on each heat exchange element surface of secondary evaporimeter 18, like this, waste liquid just constantly circulates in secondary evaporimeter 18, continuous heating, until boiling.Open one-level evaporation feed liquor by-pass valve control 26,26 is one-level evaporation feed liquor by-pass valve control, with the outlet of secondary evaporimeter circulating pump 17, when needing charging in one-level evaporator shell, open one-level evaporation feed liquor by-pass valve control 26, waste liquid is entered in one-level evaporimeter 25 by secondary evaporimeter 18.Waste liquid enters in one-level evaporimeter 25 by secondary evaporimeter 18, opens one-level evaporimeter circulating pump 27, waste liquid is evenly distributed on each heat exchange element surface of one-level evaporimeter 25.Open live steam by-pass valve control 34, live steam from boiler enters in the heater of one-level evaporimeter 25 by live steam steam supply pipe 35, live steam and waste liquid continue to produce heat exchange by the ringing of one-level evaporimeter circulating pump 27 on heat exchange element surface, waste liquid is constantly heated, thus arrive boiling point and produce indirect steam, enter in the heater of secondary evaporimeter 18 through one-level evaporimeter secondary steam pipe 24, continue to produce heat exchange by the ringing of secondary evaporimeter circulating pump 17 on heat exchange element surface with rare waste liquid, rare waste liquid is constantly heated, same arrival boiling point also produces indirect steam, open the drive motors of vapour compression machine 23, close live steam by-pass valve control 34 simultaneously, vapour compression machine 23 will utilize mechanical work for compensating, consume mechanical energy, reverse Carnot cycle mode is utilized to work, absorb heat from around low temperature environment, the temperature and pressure value coming from secondary evaporimeter 18 indirect steam is elevated to setting requirement, returned in the heat exchanger of one-level evaporimeter 25 by vapour compression machine outlet 32, fully there is heat exchange with the liquid film on heat exchange element surface to undergo phase transition, become condensed water.The evaporation heat source stream of this rear stage evaporimeter 25 comes from vapour compression machine 23; The evaporation thermal source of secondary evaporimeter 18 comes from the indirect steam of one-level evaporimeter 25 generation.In the present invention, 37 is the incoagulable gas outlet of one-level evaporimeter, is communicated with, can ensures that incoagulable gas in it and residual gas are discharged in time with the steam inlet of next stage evaporimeter, can to the continual and steady heat exchange environment of evaporation process one.And final evaporator incoagulable gas outlet 38 with surface condenser together with, condensed water is formed after the some vapor be entrained in incoagulable gas is cooled, incoagulable gas is emptying by surface condenser, make the lasting discharges such as the incoagulable gas in system, air, stablize heat exchange, form effective evaporating pressure and thermograde.During work, system residual steam and incoagulable gas enter into surface condenser 12 by secondary evaporimeter fixed gas outlet 38, cooled by rare 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 acting in conjunction of surface condenser, by keeping the stable evaporation continued, form continuously evaporation process.
When waste liquid by evaporation and concentration to opening dense waste liquid discharging control valve door 29 during finite concentration, dense waste liquid enters into thus to be scrapped liquid bath 1 and stores, and reclaims utility wherein and is recycled.
The condensed water that one-level evaporimeter 25 produces enters into one-level evaporator condensation water pot 31 by one-level evaporator condensation water outlet pipe 28; The condensed water that secondary evaporimeter 18 produces enters into secondary evaporimeter condensate water pot 20 by secondary evaporimeter condensating water outlet tube 19; The condensed water that surface condenser 12 produces is communicated with other condensed waters and enters into surface condenser condensate water pot 10 by pipeline in the lump, is delivered to condensate draining 7 stores reuse by condensation water collection pump 9.Such whole system just achieves the design object of low energy consumption, zero-emission.
In the present invention, vapour compression machine 23 is nested in the indirect steam outlet end of secondary evaporimeter 18, utilize the structure space of evaporimeter itself as the place of vapour compression machine turbine, namely, vapour compression machine 23 and secondary evaporimeter 18 are an organic assembling body, the less housing of indirect steam pipeline and vapour compression machine, pipeline and the structural damping of steam reduce greatly, and compression efficiency is improved, less energy loss.
A branch road of threeway 42 and the outlet of secondary evaporimeter circulating pump 17, when closing inlet control valve door 26, processed in pending liquid feeding secondary evaporimeter 18 by secondary evaporimeter circulating pump 17.When needing charging in one-level evaporator shell, open one-level evaporation feed liquor by-pass valve control 26, waste liquid can enter in one-level evaporimeter 25 by secondary evaporimeter 18, process in the housing being entered into one-level evaporimeter by secondary evaporimeter 18 evaporation and concentrating waste liquid to a certain extent thus, and evaporated by systems stay, waste liquid in one-level evaporimeter 25 opens discharging control valve door 29 after being concentrated to predetermined concentration, dense waste liquid can be entered in dense waste liquid tank 2, to treat post processing.
In the present invention, the evaporator of plural serial stage, improves evaporation efficiency to greatest extent, farthest reduces energy consumption, the applicability increasing system and manufacturability.Simultaneously, pending waste liquid is adopted to use as cooling medium, make use of system warm-up well, decrease the consumption of industrial clear water, also eliminate the construction of cooling tower systems, investment intensity greatly reduces, and also saves valuable land resource, be one and realize resource recycling, the effective means of industrial waste zero-emission.
Claims (9)
1. a MVR multi-stage evaporation unit, comprise: evaporimeter, compressor, condensate water pot, reservoir, the pipeline of initial steam, indirect steam pipeline are provided for evaporimeter, are communicated with pipeline between evaporimeter and fluid reservoir and between each fluid reservoir, and valve and pump, it is characterized in that at least adopting the evaporators of two series connection mutually.
2. MVR multi-stage evaporation unit according to claim 1, it is characterized in that evaporimeter at different levels respectively configures corresponding condensate water pot and circulating pump, the indirect steam outlet of each previous stage evaporimeter shell side is communicated with the steam inlet of rear stage evaporator heater, in evaporimeter indirect steam exit, vapour compression machine is set, the steam (vapor) outlet of vapour compression machine is communicated with the heater of previous stage evaporimeter, evaporator condensation water outlet pipe at different levels is communicated with corresponding condensate water pot, the circulation fluid outlet of evaporimeter at different levels is connected with pump entry at the corresponding levels, circulating-pump outlet at different levels is communicated with the circulation fluid entrance of evaporimeter at the corresponding levels, the live steam pipe being communicated with live steam source is also had at the vapor inlet port place of first evaporator heater, described live steam pipe is provided with live steam by-pass valve control.
3. MVR multi-stage evaporation unit according to claim 2, it is characterized in that collecting mouth place at the fixed gas of evaporimeter at different levels arranges thin device of air, and the shell side of surface condenser is provided with the exhaust outlet of incoagulable gas being discharged system.
4. MVR multi-stage evaporation unit according to claim 2, it is characterized in that also being provided with surface condenser in device, the shell side of surface condenser and the fixed gas of final evaporator are collected mouth and are connected, the cooling medium inlet of the tube side of surface condenser and outlet respectively with wait upon the delivery pump that disposes waste liquid and be connected with pending waste liquid tank, final evaporator charging aperture, and the shell side of surface condenser is provided with the exhaust outlet of incoagulable gas being discharged system, the fixed gas of the evaporimeters at different levels except final evaporator is collected mouth pipeline and is communicated with the heater of rear stage evaporimeter.
5. MVR multi-stage evaporation unit according to claim 4, the indirect steam exit only at final evaporator in described vaporising device arranges vapour compression machine.
6. MVR multi-stage evaporation unit according to claim 5, is characterized in that the vapor inlet port of first evaporator is provided with a steam vacuum tank.
7. MVR multi-stage evaporation unit according to claim 6, it is characterized in that the tube side outlet of surface condenser is communicated with the feed pipe of pending waste liquid tank with evaporimeter shell side with two branch roads being communicated with the first threeway respectively by the first threeway, and on two branch roads of the first threeway, be respectively arranged with waste reflux by-pass valve control and evaporation feed by-pass valve control.
8. MVR multi-stage evaporation unit according to claim 7, it is characterized in that the material liquid outlet of evaporimeter at different levels is communicated with second threeway, another two branch roads of the second threeway are communicated with the input port of evaporation feed by-pass valve control and circulating pump respectively, the liquid outlet of circulating pump is communicated with the 3rd threeway, two other branch road of 3rd threeway is communicated with the material liquid outlet of the evaporimeter of previous stage and the circulation fluid entrance of evaporimeter at the corresponding levels respectively, and on the branch road of the material liquid outlet of the evaporimeter of connection previous stage, be provided with the inlet control valve door of previous stage evaporimeter, circulating pump liquid outlet to first evaporator feed flow is communicated with the 4th threeway, two branch roads of the 4th threeway are communicated with the circulation fluid entrance of dense waste liquid tank and first evaporator respectively.
9. MVR multi-stage evaporation unit according to claim 8, is characterized in that being provided with double effect evaporator in device.
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| CN201610080259.0A CN105536276B (en) | 2016-02-05 | 2016-02-05 | A kind of MVR multi-stage evaporation units |
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| CN201610080259.0A CN105536276B (en) | 2016-02-05 | 2016-02-05 | A kind of MVR multi-stage evaporation units |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106582050A (en) * | 2016-11-03 | 2017-04-26 | 江苏海雷德蒙新能源有限公司 | Falling film evaporator liquid supply control system |
| CN106623215A (en) * | 2016-11-22 | 2017-05-10 | 广东新球清洗科技股份有限公司 | Energy-saving recycling method of hydrocarbon cleaning agent and hydrocarbon cleaning equipment |
| CN106964169A (en) * | 2017-05-11 | 2017-07-21 | 刘向东 | Suitable for high-salt concentrated degree and have crystal separate out MVR crystallizing evaporators and its production technology |
| CN107019928A (en) * | 2017-05-20 | 2017-08-08 | 兰州节能环保工程有限责任公司 | A kind of liquid evaporation enrichment facility |
| CN108217793A (en) * | 2018-03-22 | 2018-06-29 | 兰州节能环保工程有限责任公司 | The vaporising device of two kinds of variety classes waste liquids can simultaneously be handled simultaneously with self-cleaning function |
| CN108217792A (en) * | 2018-03-22 | 2018-06-29 | 兰州节能环保工程有限责任公司 | Multi-functional MVR vaporising devices |
| WO2018133724A1 (en) * | 2017-01-17 | 2018-07-26 | 南京工业大学 | Multi-stage evaporation system utilizing enhanced sub-gravitational field |
| CN109022147A (en) * | 2018-09-21 | 2018-12-18 | 江阴天田真空设备制造有限公司 | A kind of multistage deodorization vapo(u)rization system of condensation freezing with ice-breaking steam |
| CN110354517A (en) * | 2019-06-19 | 2019-10-22 | 常熟美特钙业有限公司 | A kind of double-effect evaporation production technology of high concentration precipitated calcium carbonate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070204963A1 (en) * | 2003-12-11 | 2007-09-06 | Praschak Herbert | Evaporation system |
| CN103830923A (en) * | 2014-03-19 | 2014-06-04 | 杜明生 | Second-effect MVR (mechanical vapor recompression) vaporization system |
| CN104162283A (en) * | 2014-08-22 | 2014-11-26 | 天津市红特顺科技有限公司 | Double-effect Roots-type MVR (Mechanical Vapor Recompression) falling film evaporation system |
| CN104307195A (en) * | 2014-10-10 | 2015-01-28 | 上海远跃制药机械有限公司 | Double-effect falling film MVR evaporation system |
| CN105036223A (en) * | 2015-08-25 | 2015-11-11 | 兰州节能环保工程有限责任公司 | High-efficiency energy-saving sewage treatment method and device |
| CN205730417U (en) * | 2016-02-05 | 2016-11-30 | 兰州节能环保工程有限责任公司 | A kind of MVR multi-stage evaporation unit |
-
2016
- 2016-02-05 CN CN201610080259.0A patent/CN105536276B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070204963A1 (en) * | 2003-12-11 | 2007-09-06 | Praschak Herbert | Evaporation system |
| CN103830923A (en) * | 2014-03-19 | 2014-06-04 | 杜明生 | Second-effect MVR (mechanical vapor recompression) vaporization system |
| CN104162283A (en) * | 2014-08-22 | 2014-11-26 | 天津市红特顺科技有限公司 | Double-effect Roots-type MVR (Mechanical Vapor Recompression) falling film evaporation system |
| CN104307195A (en) * | 2014-10-10 | 2015-01-28 | 上海远跃制药机械有限公司 | Double-effect falling film MVR evaporation system |
| CN105036223A (en) * | 2015-08-25 | 2015-11-11 | 兰州节能环保工程有限责任公司 | High-efficiency energy-saving sewage treatment method and device |
| CN205730417U (en) * | 2016-02-05 | 2016-11-30 | 兰州节能环保工程有限责任公司 | A kind of MVR multi-stage evaporation unit |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106582050A (en) * | 2016-11-03 | 2017-04-26 | 江苏海雷德蒙新能源有限公司 | Falling film evaporator liquid supply control system |
| CN106623215A (en) * | 2016-11-22 | 2017-05-10 | 广东新球清洗科技股份有限公司 | Energy-saving recycling method of hydrocarbon cleaning agent and hydrocarbon cleaning equipment |
| GB2571887A (en) * | 2017-01-17 | 2019-09-11 | Nanjing University Of Technology | Multi-stage evaporation system utilizing enhanced sub-gravitational field |
| GB2571887B (en) * | 2017-01-17 | 2022-03-23 | Nanjing University Of Technology | Multi-stage evaporation system enhanced by a gravity-reduced field |
| US10773182B2 (en) | 2017-01-17 | 2020-09-15 | Nanjing Tech University | Multi-stage evaporation system enhanced by a gravity-reduced field |
| WO2018133724A1 (en) * | 2017-01-17 | 2018-07-26 | 南京工业大学 | Multi-stage evaporation system utilizing enhanced sub-gravitational field |
| CN106964169A (en) * | 2017-05-11 | 2017-07-21 | 刘向东 | Suitable for high-salt concentrated degree and have crystal separate out MVR crystallizing evaporators and its production technology |
| CN107019928A (en) * | 2017-05-20 | 2017-08-08 | 兰州节能环保工程有限责任公司 | A kind of liquid evaporation enrichment facility |
| CN108217792A (en) * | 2018-03-22 | 2018-06-29 | 兰州节能环保工程有限责任公司 | Multi-functional MVR vaporising devices |
| CN108217793A (en) * | 2018-03-22 | 2018-06-29 | 兰州节能环保工程有限责任公司 | The vaporising device of two kinds of variety classes waste liquids can simultaneously be handled simultaneously with self-cleaning function |
| CN109022147A (en) * | 2018-09-21 | 2018-12-18 | 江阴天田真空设备制造有限公司 | A kind of multistage deodorization vapo(u)rization system of condensation freezing with ice-breaking steam |
| CN110354517A (en) * | 2019-06-19 | 2019-10-22 | 常熟美特钙业有限公司 | A kind of double-effect evaporation production technology of high concentration precipitated calcium carbonate |
| CN110354517B (en) * | 2019-06-19 | 2021-10-26 | 常熟美特钙业有限公司 | Double-effect evaporation production process of high-concentration light calcium carbonate |
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