CN204395479U - A kind of continuous evaporative crystallization device of function of mechanical steam recompression - Google Patents
A kind of continuous evaporative crystallization device of function of mechanical steam recompression Download PDFInfo
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- CN204395479U CN204395479U CN201520033147.0U CN201520033147U CN204395479U CN 204395479 U CN204395479 U CN 204395479U CN 201520033147 U CN201520033147 U CN 201520033147U CN 204395479 U CN204395479 U CN 204395479U
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Abstract
The utility model relates to a kind of continuous evaporative crystallization device next energy-conservation by function of mechanical steam recompression.This device comprises preheater, climbing film evaporator, compressor, circulating evaporator, gas-liquid separator and a crystal separator; Gas-liquid separator is provided with entrance, the first outlet, the second outlet and the 3rd outlet; Preheater connects climbing film evaporator by pipeline, and climbing film evaporator connects the entrance of gas-liquid separator; Compressor is connected between gas-liquid separator and climbing film evaporator by steam conveying pipe; Circulating evaporator is connected between the second outlet and entrance by pipeline, and cooling water, as the thermal source of preheater, is sent into preheater, to the material supplementary heating flowed through in preheater by the cooling water after the cooling water after climbing film evaporator heat exchange and circulating evaporator heat exchange; Crystal separator connects the 3rd outlet on gas-liquid separator.Adopt this continuous evaporative crystallization device, not only cost is low, and raw material is without waste, and continuity is good, and has fine energy-saving effect.
Description
Technical field
The utility model relates to a kind of continuous evaporative crystallization device next energy-conservation by function of mechanical steam recompression.
Background technology
Function of mechanical steam recompression (Mechanical Vapor Recompression) technology is a kind of high-efficient energy-saving environment friendly technology, and this technology mainly uses a kind of mechanical device by the heat energy transfer of cryogenic object in higher temperature object.Its detailed process is compressed through Mechanical Vapor Compression (compressed media is generally steam) by the indirect steam produced in evaporation process, make its temperature, pressure increase, heat enthalpy value increases, and the steam like this after overcompression directly can be used as the heat source of this level system.Compressed steam enters heating outer tube and heats solution, and indirect steam discharges its latent heat and is condensed into condensed water, and feed liquid absorbs its latent heat and produces new indirect steam, and indirect steam is inhaled into again compression in Mechanical Vapor Compression, carries out circulating and evaporating so continually.
Although disclose a lot of the continuous evaporative crystallization device and the method that adopt mechanical vapor recompression technology in prior art, and a lot of function of mechanical steam recompression continuous evaporative crystallization system generally only has single-stage vapor compression machine to the heat supply of evaporimeter, in crystallizer part, material does not still carry out a large amount of heat supplies, cause the crystallization effect of existing function of mechanical steam recompression continuous evaporative crystallization system bad, the problem such as grain size number is tiny as occurred.Certainly, also there is part producer can increase jet chimney with supplementary crystalline portion heat supply, but considerably increase the complexity of MVR system, and rely on steam boiler, make MVR system without its original significant advantage-break away from dependence to steam boiler.For these problems, publication number is disclose a kind of function of mechanical steam recompression continuous evaporative crystallization system of solving the problem and method in CN103203116A Chinese utility model patent ublic specification of application, this function of mechanical steam recompression continuous evaporative crystallization system have employed two Mechanical Vapor Compression, and two compressors are respectively to evaporimeter and crystallizer heat supply, also to condensed water Exposure degree, for preheating, but this continuous evaporative crystallization system have employed two Mechanical Vapor Compression, the equipment cost buying two Mechanical Vapor Compression is very high, and do not have rational structure to be heated to bubble point temperature to material in advance, the energy consumption of therefore starting two compressors is also very high, structure is numerous and diverse, cause energy-saving effect also unsatisfactory.
Utility model content
Goal of the invention of the present utility model is to provide a kind of novel structure, and cost is low, and raw material is without waste, and continuity is good, and has the continuous evaporative crystallization device of better energy-saving effect.
In order to realize foregoing invention object, the utility model have employed following technical scheme:
A continuous evaporative crystallization device for function of mechanical steam recompression, described evaporated crystallization device comprises for the raw material tank of material feeding to be crystallized, the preheater of electrified heating device, climbing film evaporator, function of mechanical steam recompression machine, forced-circulation evaporator, gas-liquid separator and a crystal separator; Described gas-liquid separator be provided with entrance for sending into gas-liquid mixture, for export steam the first outlet, for feed liquid forced circulation the second outlet and send three outlet of feed liquid for crystallization; Described raw material tank connects the material input of preheater by pipeline, and the material output of preheater connects the material input of climbing film evaporator by pipeline, the material output of climbing film evaporator connects the entrance of gas-liquid separator; Described function of mechanical steam recompression machine is connected between the first outlet of gas-liquid separator and the thermal source input of climbing film evaporator by steam conveying pipe; Described forced-circulation evaporator is connected between the second outlet of gas-liquid separator and the entrance of gas-liquid separator by pipeline, and the thermal source input of forced-circulation evaporator connects the thermal source input of described climbing film evaporator or directly connects the superheated steam output of function of mechanical steam recompression machine compression, the cooling water output of climbing film evaporator and forced-circulation evaporator is connected by pipeline and cooling water is sent into the thermal source input of preheater, in order to the material supplementary heating flowed through in preheater; Described crystal separator connects the 3rd outlet on described gas-liquid separator.
As preferably, air filter formula screen pack is provided with in described gas-liquid separator, air filter formula screen pack is that a stratum reticulare is high between 80-150mm, the silk screen of order number between 300-500 order, and air filter formula screen pack outward flange is connected with gas-liquid separator inner wall sealing, to be divided into upper and lower two chambers in gas-liquid separator, the entrance for sending into gas-liquid mixture is positioned at below air filter formula screen pack, is positioned at above air filter formula screen pack for the first outlet exporting steam.
As preferably, described climbing film evaporator is pipe heat exchanger.
As preferably, described crystal separator is provided with crystallize out delivery outlet and feed liquid delivery outlet, and described feed liquid delivery outlet is connected into the pipeline connected between described forced-circulation evaporator and the second outlet of gas-liquid separator.
Have employed the continuous evaporative crystallization device of technique scheme, this continuous evaporative crystallization device only adopts single Mechanical Vapor Compression, with more existing adopt compared with the continuous evaporative crystallization device of mechanical vapor recompression technology, the Mechanical Vapor Compression of its default unit price costliness.Simultaneously, the only continuous evaporative crystallization device of single Mechanical Vapor Compression establishment, also multistage recovery indirect steam being carried out to energy can be achieved, the sensible heat of final withdrawal indirect steam and latent heat, and gas-liquid separator is entered to material and crystal separator carries out level forced circulation, also take full advantage of the heat of indirect steam in forced circulation, finally in preheater, discharge condensed water.Therefore the above-mentioned continuous evaporative crystallization device not only novelty rational in infrastructure that provides of the utility model, the equipment cost adopted of building this device is low, and adopt this equipment can realize raw material without waste, be beneficial to consecutive production, the basis of guarantee continuous crystallisation effect also reaches good energy-saving effect.
Accompanying drawing explanation
Fig. 1: the structural representation of continuous evaporative crystallization device in the utility model embodiment.
Fig. 2: the part section structural representation of gas-liquid separator in the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described further.
Embodiment 1:
The continuous evaporative crystallization device of a kind of function of mechanical steam recompression as shown in Figure 1, this evaporated crystallization device forms primarily of for the preheater 2 of the raw material tank 1 of material feeding to be crystallized, electrified heating device, climbing film evaporator 3, Mechanical Vapor Compression 5, forced-circulation evaporator 7, gas-liquid separator 4 and crystal separator 6.
The preheater 2 of above-mentioned electrified heating device, climbing film evaporator 3 and forced-circulation evaporator 7 mainly through heat exchange mode to the heating material flow in it, therefore, its structure is heat exchanger, all has the material input flowed into for material, flows through in it material output having flowed out heating or evaporation; Also there is the thermal source input and cooling water output, totally four ports that flow into thermal source.And preheater 2 is except possessing heat exchanger structure, its inside has also installed electric heater additional, in conjunction with heat supply.
As depicted in figs. 1 and 2, the top of above-mentioned gas-liquid separator 4 is provided with the entrance 40 for sending into gas-liquid mixture and the first outlet 41 for exporting steam, the bottom of gas-liquid separator 4 be provided with for feed liquid forced circulation the second outlet 42 and send three outlet 43 of feed liquid for crystallization, air filter formula screen pack 44 is provided with on the entrance 40 of gas-liquid separator 4 and on the gas-liquid separator 4 of the upper/lower positions of the first outlet 41, air filter formula screen pack 44 is that a stratum reticulare is high between 80-150mm, the silk screen of order number between 300-500 order, and air filter formula screen pack 44 outward flange is connected with gas-liquid separator 4 inner wall sealing, upper and lower two chambers will be divided in gas-liquid separator 4.
As shown in Figure 1, the above-mentioned raw material tank 1 for material feeding to be crystallized comprises a storage salt material cylindrical shell and is arranged on the agitator in cylindrical shell, cylindrical shell lower end connects pipeline, namely this raw material tank 1 connects preheater 2 by pipeline, and specifically raw material tank 1 lower end connects the material input 20 of preheater 2 by the pipeline of a band feed pump 9.Material output 21 pipeline of preheater 2 connects the material input 30 of climbing film evaporator 3, and material flows to climbing film evaporator 3 climbing-film evaporation and sprays from its material output 31, and climbing film evaporator 3 connects the entrance 40 on above-mentioned gas-liquid separator 4.The feed liquid of sending of gas-liquid separator 4 exports 43 by pipeline connection crystal separator 6 for the 3rd of crystallization, crystal separator 6 is provided with crystallize out delivery outlet 61 and feed liquid delivery outlet 62, and the crystallize out delivery outlet 61 of crystal separator 6 connects the holding tank 8 below it.
The input 50 being connected Mechanical Vapor Compression 5 for the first outlet 41 exporting steam by steam conveying pipe 500 of above-mentioned gas-liquid separator 4.The output 51 of Mechanical Vapor Compression 5 is connected into the thermal source input 32 of climbing film evaporator 3 by steam conveying pipe 500, the superheated steam that shortens into of vapour pressures in order to first of described gas-liquid separator the outlet 41 to be exported also sends into climbing film evaporator 3, rises film heat to realize material in climbing film evaporator 3.
Above-mentioned forced-circulation evaporator 7 is connected between the second outlet 42 of gas-liquid separator 4 and the entrance 40 of gas-liquid separator by pipeline, specifically the material input 70 of forced-circulation evaporator 7 exports 42 by the band pipeline of circulating pump 10 with second of gas-liquid separator 4 and is connected, and the material output 71 of forced-circulation evaporator 7 is linked back by pipeline the entrance 40 of liquid/gas separator.And the thermal source input 72 of forced-circulation evaporator 7 connects the steam conveying pipe 500 of the superheated steam that Mechanical Vapor Compression 5 compresses or connects the thermal source input 32 of climbing film evaporator.
Cooling water after cooling water after the heat exchange of above-mentioned climbing film evaporator 3 and forced-circulation evaporator 7 heat exchange is the hot water with uniform temperature, also as the thermal source of preheater 2, thus energy-conservation further.Therefore, the cooling water output 73 of climbing film evaporator 3 cooling water output 33 and forced-circulation evaporator 7 is connected the thermal source input 22 of preheater 2 by pipeline, and object cooling water is sent into preheater 2 in order to the material preheating flowed through in preheater.In fact, the power dissipation ratio that every platform Mechanical Vapor Compression 5 uses is larger, if material is not heated to bubble point temperature in preheater 2, finally can affect rear film of continuing rising heat and compressor to the total power consumption of the recompression process of steam, the total energy consumption of whole continuous crystallisation device can be increased, but in order to ensure good energy saving technology effect, depend merely on the preheater 2 sometimes pre-heating temperature elevation deficiency of cooling water as thermal source, therefore the utility model have employed the preheater 2 of electrified heating to ensure will flow out the heating material of preheater 2 to bubble point temperature.
The feed liquid delivery outlet 62 of above-mentioned crystal separator is connected into the pipeline connected between forced-circulation evaporator 7 and the second outlet 42 of gas-liquid separator 4, again participates in forced-circulation evaporation, ensures continuous crystallisation better.
As fully visible, the utility model adopts a Mechanical Vapor Compression 5 pairs of climbing film evaporators 3 and forced-circulation evaporator 7 together steam heating, respectively climbing film evaporator 3 and forced-circulation evaporator 7 are distinguished to the equipment of heat supply than employing two Mechanical Vapor Compression 5, at least energy-conservation more than 20%.Why adopt a Mechanical Vapor Compression 5 just can realize above-mentioned heat supply, one of reason is also that combining the utility model have employed and by the preheater 2 of heating material to bubble point temperature, thus can reduce the operating pressure of single Mechanical Vapor Compression 5.Consider that Mechanical Vapor Compression 5 is expensive, in the continuous evaporative crystallization equipment of existing employing mechanical vapor recompression technology, the price of Mechanical Vapor Compression 5 accounts for complete equipment price 30-50%, therefore taking cost into account, continuous evaporative crystallization device of the present utility model has the two-fold advantage that cost is low and energy consumption is low concurrently.
The above-mentioned Mechanical Vapor Compression 5 of the present embodiment is Roots Compressor, and above-mentioned climbing film evaporator 3 is pipe heat exchangers.
Adopt a continuous evaporative crystallization method for above-mentioned continuous evaporative crystallization device, comprise the steps:
A. first, material feeding to be crystallized sent in the preheater 2 of electrified heating, the above-mentioned cooling water thermal source acting in conjunction in electrical heating and preheater, by heating material to its bubble point temperature, but does not produce the hot solution of steam;
B. the hot solution in step a is sent in climbing film evaporator 3, superheated steam after climbing film evaporator 3 is compressed by Mechanical Vapor Compression 5 is as using, heat exchange is carried out to above-mentioned hot solution material, realize rising film heating, and producing a large amount of indirect steams, solution is brought into gas-liquid separator 7 by indirect steam together.
In this step, employing climbing film evaporator 3 is that the advantage of pipe heat exchanger is as follows: first, the expense of pipe heat exchanger unit volume is minimum in current evaporimeter, secondly, compared with other evaporimeters, pipe heat exchanger structure is more simple, and making and installation requires relatively low, finally, in the heat-transfer pipe of pipe heat exchanger, the flow velocity of indirect steam is quite fast, and between usual 20m/s-50m/s, the feed liquid time of staying is short, but total heat exchange system is still larger, generally can reach 1200 ~ 6009w/m
2h DEG C.
The indirect steam that wherein solution is brought into gas-liquid separator 4 process by indirect steam together sprays into speed between 25 ~ 50m/s, in order to prevent indirect steam short circuit, during work, the air filter formula screen pack installed in above-mentioned gas-liquid separator 4 forms one mist eliminating barrier, the liquid foam gear carried secretly by the indirect steam that material evaporation produces goes back, and only has indirect steam to pass through.
Consider that indirect steam sprays into speed between 25 ~ 50m/s, speed quickly, therefore we to have employed stratum reticulare high between 80-150mm, the silk screen of order number between 300-500 is as air filter formula screen pack, silk screen is to the mist of particle diameter >=3 ~ 5um, arresting efficiency reaches 97%-98.9%, and effect is very good.
C. be separated through gas-liquid separator 4, a concentrated solution part exports 42 by gas-liquid separator 4 second and again sends into forced-circulation evaporator 7 heating evaporation, and the gas-liquid mixture of generation returns to gas-liquid separator 4; Another part is from being expelled to crystal separator crystallization 6;
D. in separator crystallization 6, crystallize out is discharged, and residue concentrated solution also delivers to heating evaporation in the forced-circulation evaporator 7 in step c;
In described step c, indirect steam is sent gas-liquid separator and is compressed into superheated steam by function of mechanical steam recompression machine, then sends into climbing film evaporator 3 and forced-circulation evaporator 7 as heating energy source; Cooling water is sent into the part heating energy source of preheater 2 as pre-heater by the cooling water output of climbing film evaporator 3 and forced-circulation evaporator 7.By the multistage recycling of this steam thermal energy, adopt the continuous evaporative crystallization method of said apparatus, not only continuous seepage is effective, and without wastage of material, cost is low, but also very energy-conservation.
Claims (4)
1. a continuous evaporative crystallization device for function of mechanical steam recompression, is characterized in that: described evaporated crystallization device comprises for the raw material tank of material feeding to be crystallized, the preheater of electrified heating device, climbing film evaporator, function of mechanical steam recompression machine, forced-circulation evaporator, gas-liquid separator and a crystal separator; Described gas-liquid separator be provided with entrance for sending into gas-liquid mixture, for export steam the first outlet, for feed liquid forced circulation the second outlet and send three outlet of feed liquid for crystallization; Described raw material tank connects the material input of preheater by pipeline, and the material output of preheater connects the material input of climbing film evaporator by pipeline, the material output of climbing film evaporator connects the entrance of gas-liquid separator; Described function of mechanical steam recompression machine is connected between the first outlet of gas-liquid separator and the thermal source input of climbing film evaporator by steam conveying pipe; Described forced-circulation evaporator is connected between the second outlet of gas-liquid separator and the entrance of gas-liquid separator by pipeline, and the thermal source input of forced-circulation evaporator connects the thermal source input of described climbing film evaporator or directly connects the superheated steam output of function of mechanical steam recompression machine compression, climbing film evaporator is all connected the thermal source input of preheater with the cooling water output of forced-circulation evaporator by pipeline, and cooling water is sent into preheater, in order to the material supplementary heating flowed through in preheater; Described crystal separator connects the 3rd outlet on described gas-liquid separator.
2. the continuous evaporative crystallization device of a kind of function of mechanical steam recompression according to claim 1, it is characterized in that: in described gas-liquid separator, be provided with air filter formula screen pack, air filter formula screen pack is that a stratum reticulare is high between 80-150mm, the silk screen of order number between 300-500 order, and air filter formula screen pack outward flange is connected with gas-liquid separator inner wall sealing, upper and lower two chambers will be divided in gas-liquid separator, entrance for sending into gas-liquid mixture is positioned at below air filter formula screen pack, is positioned at above air filter formula screen pack for the first outlet exporting steam.
3. the continuous evaporative crystallization device of a kind of function of mechanical steam recompression according to claim 1, is characterized in that: described climbing film evaporator is pipe heat exchanger.
4. the continuous evaporative crystallization device of a kind of function of mechanical steam recompression according to claim 1, it is characterized in that: described crystal separator is provided with crystallize out delivery outlet and feed liquid delivery outlet, described feed liquid delivery outlet is connected into the pipeline connected between described forced-circulation evaporator and the second outlet of gas-liquid separator.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104524798A (en) * | 2015-01-18 | 2015-04-22 | 丁武轩 | Continuous evaporation and crystallization device and method capable of saving energy by mechanical steam recompression |
| CN105056565A (en) * | 2015-08-12 | 2015-11-18 | 山东凯翔生物化工股份有限公司 | Device and method for evaporation and crystallization of sodium gluconate solution |
| CN106315717A (en) * | 2016-09-14 | 2017-01-11 | 合肥通用机械研究院 | MVR wastewater evaporation and concentration system |
| CN115583768A (en) * | 2022-10-20 | 2023-01-10 | 江苏远方动力科技有限公司 | High-ore desalted water evaporation crystallization device and high-ore desalted water treatment method |
-
2015
- 2015-01-18 CN CN201520033147.0U patent/CN204395479U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104524798A (en) * | 2015-01-18 | 2015-04-22 | 丁武轩 | Continuous evaporation and crystallization device and method capable of saving energy by mechanical steam recompression |
| CN104524798B (en) * | 2015-01-18 | 2016-06-08 | 丁武轩 | The continuous evaporative crystallization device of function of mechanical steam recompression and continuous evaporative crystallization method |
| CN105056565A (en) * | 2015-08-12 | 2015-11-18 | 山东凯翔生物化工股份有限公司 | Device and method for evaporation and crystallization of sodium gluconate solution |
| CN106315717A (en) * | 2016-09-14 | 2017-01-11 | 合肥通用机械研究院 | MVR wastewater evaporation and concentration system |
| CN106315717B (en) * | 2016-09-14 | 2019-05-28 | 合肥通用机械研究院有限公司 | A kind of MVR waste water evaporation concentration device |
| CN115583768A (en) * | 2022-10-20 | 2023-01-10 | 江苏远方动力科技有限公司 | High-ore desalted water evaporation crystallization device and high-ore desalted water treatment method |
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