CN208574232U - A kind of evaporating, concentrating and crystallizing system - Google Patents

Abstract

The utility model relates to a kind of evaporating, concentrating and crystallizing systems, feeding-passage is connected in turn by feedstock direction, level-one preheater, second level preheater and heat-exchange system, heat-exchange system includes evaporator, primary heater, secondary heater and forced circulation pump, primary heater, forced circulation pump and secondary heater are followed in series to form loop, the discharge port of second level preheater and the first feeding inlet of primary heater connect, second feeding inlet of primary heater is connect with evaporator, the discharge port of secondary heater is connect with evaporator, the discharge port of secondary heater and the interconnecting piece of evaporator are higher than the feeding inlet of primary heater and the interconnecting piece of evaporator is arranged, the caliber of the caliber of primary heater and secondary heater respectively with the ingress adapter of forced circulation pump；Replace the former biggish single heater of caliber by primary heater and secondary heater combination, reduce material flow resistance, improve Flow of Goods and Materials performance, make less scaling in forced circulation pump, reduces energy consumption.

Description

A kind of evaporating, concentrating and crystallizing system

Technical field

The utility model relates to a kind of evaporating, concentrating and crystallizing systems.

Background technique

Evaporating, concentrating and crystallizing device is widely used in the water of the industries such as medicine, food, chemical industry and light industry or organic molten The evaporation concentrated solution and liquid waste processing of matchmaker's solution.And existing evaporating, concentrating and crystallizing device is in heat transfer process, by caliber ratio Biggish single heater exchanges heat, so that the forced circulation pump for needing to be equipped with corresponding bore matches, even if being equipped with Large-scale forced circulation pump, the bore of forced circulation pump also can not be compared with the bores of heater, and due to the caliber of heater It is far longer than the caliber of forced circulation pump, it is larger by resistance so as to cause the flowing of material, reduce the mobility of material Can, to make easily fouling in forced circulation pump, and the large-scale forced circulation pump being equipped with improves energy consumption.

Utility model content

In view of the deficienciess of the prior art, a kind of the purpose of this utility model is to provide material-heat-exchanging effects good, object Stream moves better performances and energy-efficient evaporating, concentrating and crystallizing system.

On the one hand the utility model provides a kind of evaporating, concentrating and crystallizing device, it is logical to be connected with charging in turn by feedstock direction Road, level-one preheater, second level preheater and heat-exchange system, it is characterised in that: the heat-exchange system includes that evaporator, level-one add Hot device, secondary heater and forced circulation pump, the primary heater, forced circulation pump and secondary heater are sequentially connected in series structure At loop, the discharge port of second level preheater and the first feeding inlet of primary heater are connected, the second feeding inlet of primary heater It is connect with evaporator, the discharge port of secondary heater is connect with evaporator, the connection of the discharge port and evaporator of secondary heater Portion is higher than the feeding inlet of primary heater and the interconnecting piece of evaporator is arranged, the caliber of primary heater and the pipe of secondary heater Diameter is adapted with the entrance of forced circulation pump respectively.

By using above-mentioned technical proposal, original caliber ratio is replaced by primary heater and secondary heater combination Biggish single heater, so that also need to only be equipped with small-sized forced circulation pump can realize circulation to material, due to level-one The caliber of heater and the caliber of secondary heater are adapted with the entrance of forced circulation pump respectively, so that the flowing of material be made to hinder Power is smaller, improves the mobile performance of material, makes less scaling in forced circulation pump, and small-sized forced circulation pump reduces energy Consumption, has the advantages that energy conservation.

The utility model is further arranged to: the evaporator include shell and setting heating room inside housings and Second feeding inlet of vaporization chamber, the primary heater is connect with heating room, the discharge port and vaporization chamber of the secondary heater Connection, vaporization chamber setting are provided with demister above heating room at the top of the vaporization chamber, on the side wall of the heating interior Two pieces of bafflers relatively disposed in parallel up and down are provided with, are formed with heating chamber between two pieces of bafflers, in the heating chamber It is provided with the heating tube bundle that several vertical arrangement both ends extend through two pieces of bafflers, several heating tube bundles are spaced in parallel to each other It is arranged, is provided with a central circulating tube up and down, the heating in the middle part of the heating room and among two pieces of bafflers It is provided with the heating steam inlet tube for being passed through heating steam into heating chamber on outdoor side wall, is set on the outdoor side wall of the heating It is equipped with the condensed water outlet pipe connecting with heating chamber bottom, above the central circulating tube and is located in vaporization chamber and is provided in hemisphere The evaporation deflector of shape in the vaporization chamber and is located at the spray group being provided with below demister for side wall in spraying and sprinkling evaporation room Part.

By using above-mentioned technical proposal, under the circulation continuous heating of primary heater and secondary heater, heating is completed Material afterwards is entered in the vaporization chamber of evaporator from the discharge port of secondary heater and is evaporated, in order to further cooperate material Evaporative crystallization, be provided with two pieces of bafflers relatively disposed in parallel up and down on heating indoor side wall, two pieces of bafflers it Between be formed with heating chamber, the material of a part of carburation by evaporation rises, and another part temperature is not enough to the material decline of carburation by evaporation It is heated into heating room, the insufficient material of the temperature that heating chamber is recycled enters from below to be arranged in heating chamber In several vertical arrangements and both ends extend through in the heating tube bundle of two pieces of bafflers, heating tube bundle is located in heating chamber, The heating steam inlet tube being provided on outdoor side wall for being passed through heating steam into heating chamber is heated, heating steam passes through heating Steam inlet tube enters the material for being not enough to carburation by evaporation to temperature in heating tube bundle in heating chamber and heats, by several heating Tube bank is set as setting spaced in parallel to each other, so that it is uniformly heated, improves the contact area of heating, to rapidly be added Hot vapour ascension, is upwardly into vaporization chamber, meanwhile, in order to cooperate the carburation by evaporation of material, in the middle part of heating room and it is located at It is provided with a central circulating tube up and down among two pieces of bafflers, leads to the insufficient material of temperature in vaporization chamber from top to bottom Cross central circulating tube, while under the effect of the continuous heating of heating chamber, temperature increase and the material that is heated simultaneously from it is lower toward On re-entered into vaporization chamber after heating tube bundle, to accomplish the duration circulating-heating to material, guarantee heating effect The utilization rate and evaporative crystallization speed of material are also improved while fruit, are improved production efficiency, are condensed out on heating tube bundle Condensed water pass through the condensed water outlet pipe for being arranged in and heating and connect on outdoor side wall with heating chamber bottom and export, prevent internal cooling The accumulation of water absorbs heat, causes the consumption of the energy, is provided with above central circulating tube and in vaporization chamber hemispherical Evaporation deflector, the setting of evaporation deflector hemispherical is on the one hand for avoiding the material after evaporation from entering directly into and removes It in foam device, causes foam removal in the demister short time to be not thorough, influences the effect of foam removal, and play the work of lasting accumulation heat With the material guidance for increasing the heat in vaporization chamber to facilitate the evaporative crystallization of material, after on the other hand evaporating ascension To on the inner sidewall of vaporization chamber, it is equipped with and is used for side wall in spraying and sprinkling evaporation room in vaporization chamber and below demister Spray assemblies, the appearance of material incrustation phenomenon on vaporization chamber inner sidewall after reducing evaporation, avoid the occurrence of heat transfer deterioration, follow Ring compression rises, unit vacuum degree reduces, influences the phenomenon that unit operation efficiency, causes the appearance of larger economic loss.

The utility model is further arranged to: the spray assemblies include the cyclic annular spray tube being arranged in vaporization chamber, institute It states on cyclic annular spray tube outer tube wall circumferentially equally spaced from each other from being provided with several spray nozzles, the output end court of the spray nozzle It is arranged to vaporization chamber inner sidewall, the conduit for being continually fed into heated material is connected on the ring-type spray tube.

By using above-mentioned technical proposal, after the heating vaporization of material in vaporization chamber rises, a part of material can be Structure on vaporization chamber inner sidewall, the material after heating is imported into the cyclic annular spray tube being arranged in vaporization chamber from conduit, through setting It sets on several spray nozzles spray to vaporization chamber inner sidewall on cyclic annular spray tube outer tube wall, is sprayed using the material after heating On the other hand effect reduces the influence to the evaporation efficiency of evaporator, no on the one hand for cooperating the phenomenon that preventing fouling The ejecta of special disposal spray nozzle is needed, spraying effect is good and does not need to clear up, and prevents the appearance of scale formation, knot Structure is simple and reliable.

The utility model is further arranged to: the hull outside is provided with Matter Transfer pump, the Matter Transfer pump Output end is connect by conduit with cyclic annular spray tube, and the input terminal of the Matter Transfer pump is connected with feed pipe, the feed pipe One end far from Matter Transfer pump is through shell and extends in heating room.

By using above-mentioned technical proposal, in order to further decrease energy consumption, the material that heating is recycled is sprayed, Hull outside is provided with Matter Transfer pump, and the output end of Matter Transfer pump is connect by conduit with cyclic annular spray tube, and input terminal is logical It crosses feed pipe and is connected to the material heated in room, to be extracted in heating room under the action of Matter Transfer pump by feed pipe Material entered in cyclic annular spray tube through conduit, to carry out lasting spray to the inner sidewall of vaporization chamber, while after spraying Material fall back in heating room and heated again, while temperature can also be extracted meet the material of evaporating temperature and be directly entered It is evaporated into vaporization chamber, improves the efficiency of evaporation, accelerate whole speed of production.

The utility model is further arranged to: the output end of the spray nozzle tilts down setting, and in shell Axis is in 45 degree of angles.

By using above-mentioned technical proposal, in order to further increase the effect of spray, avoids the occurrence of vaporization chamber inner sidewall and go out The phenomenon that existing fouling, influences normal crystallization, the output end of spray nozzle is tilted down setting, and be in four with the central axes of shell 15 degree of angles, the structure ensure that the effect of spray maximizes, and the angle of generation carries out reinforcement spray to the inner sidewall of vaporization chamber Leaching is rinsed, and the effect of rinse spray is improved.

The utility model is further arranged to: heater box is connected on the conduit, the heater box is internally provided with disk The electric heating tube of tubulose.

By using above-mentioned technical proposal, in order to accelerate the efficiency of evaporative crystallization, keep a part straight by the material of spray Connect evaporative crystallization, be also connected with heater box on conduit, material enter in heater box after by coil-like electric heating tube It after heating, enters back into vaporization chamber, which can be used for heated material, improve the efficiency of evaporative crystallization.

The utility model is further arranged to: being recycled between the primary heater and secondary heater by Heat preservation Pipe connection, the Heat preservation circulation pipe include outer tube and inner tube, and the outer tube includes that first set gradually from outside to inside protects Warm layer and second thermal insulation layer are provided with vacuum heat-insulating layer between the second thermal insulation layer and inner tube.

By using above-mentioned technical proposal, in order to avoid occurring the loss of thermal energy during circulation, followed to reduce The heating efficiency of ring is connected between primary heater and secondary heater by Heat preservation circulation pipe, to add in circulation In the process of heat, when the material of heating passes through Heat preservation circulation pipe, internal heat will not quickly become separated in flight, and reduce heat when transmitting Loss, sets Heat preservation circulation pipe to include outer tube and inner tube, and outer tube includes that first set gradually from outside to inside protects again Warm layer and second thermal insulation layer, the heated material conveyed in inner tube is by the heat-blocking action of second thermal insulation layer and then by setting The first insulating layer on the outside of second thermal insulation layer is kept the temperature, and further improves the effect of insulation, while also second It is provided with vacuum heat-insulating layer between thermal insulation layer and inner tube, is preferably minimized the loss of thermal energy, does not influence the effect of circulating-heating material Rate and effect.

The utility model is further arranged to: the axial direction in said inner tube along Heat preservation circulation pipe is distributed in the shape of a spiral Heating tube, the input terminal of the heating tube, which sequentially passes through, is connected with steam lead after inner and outer tubes, the heating tube it is defeated Outlet is connected with out steam pipe after sequentially passing through inner and outer tubes.

It is preferred that are as follows: first insulating layer is polyurethane foam or phenol formaldehyde foam, and the second thermal insulation layer is glass fibre Or asbestos.

By using above-mentioned technical proposal, spiral add is distributed in the axial direction in inner tube along Heat preservation circulation pipe Heat pipe, the heating tube setting for heat by Heat preservation circulation pipe convey hydronic material, heating tube it is defeated Enter after end sequentially passes through inner and outer tubes and be connected with steam lead, the output end of heating tube connects after sequentially passing through inner and outer tubes There is steam pipe out, hot steam enters in inner tube from steam lead, exchanges heat with the heated material of conveying, after the completion of exchanging heat On the one hand steam improves the heating efficiency of material multi heating, makes entire heating process by going out steam pipe export, the structure More quickly, it on the other hand prevents temperature decline bring loss during transmitting and reduces the reaction entirely heated, shadow Ring the speed of evaporative crystallization；In order to guarantee the effect of insulation, polyurethane foam is set by the first insulating layer or phenolic aldehyde steeps Second thermal insulation layer is set glass fibre or asbestos by foam, the effective transmitting for separating heat.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, is also possible to obtain other drawings based on these drawings.

Fig. 1 is specific embodiment of the present invention structural schematic diagram.

Fig. 2 is evaporation structure schematic diagram in specific embodiment of the present invention.

Fig. 3 is Heat preservation circulation pipe structural schematic diagram in specific embodiment of the present invention.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts Every other embodiment obtained, fall within the protection scope of the utility model.

As shown in Figure 1-Figure 3, a kind of evaporating, concentrating and crystallizing system is connected with feeding-passage, level-one in turn by feedstock direction Preheater 5, second level preheater 6 and heat-exchange system, in the utility model specific embodiment, the heat-exchange system includes evaporation Device 1, primary heater 2, secondary heater 3 and forced circulation pump 4, the primary heater 2, forced circulation pump 4 and second level Heater 3 is followed in series to form loop, and the discharge port of second level preheater 6 is connect with the first feeding inlet of primary heater 2, level-one Second feeding inlet of heater 2 is connect with evaporator 1, and the discharge port of secondary heater 3 is connect with evaporator 1, secondary heater 3 Discharge port and the interconnecting piece of evaporator 1 be higher than the feeding inlet of primary heater 2 and the interconnecting piece of evaporator 1 is arranged, level-one adds The caliber of hot device 2 and the caliber of secondary heater 3 are adapted with the entrance of forced circulation pump 4 respectively.

By using above-mentioned technical proposal, original caliber is replaced by primary heater 2 and the combination of secondary heater 3 Bigger single heater, so that also need to only be equipped with small-sized forced circulation pump 4 can realize circulation to material, due to one The caliber of grade heater 2 and the caliber of secondary heater 3 are adapted with the entrance of forced circulation pump 4 respectively, to make material Flow resistance is smaller, improves the mobile performance of material, makes less scaling in forced circulation pump 4, and small-sized forced circulation pump 4 Energy consumption is reduced, has the advantages that energy conservation.

In the utility model specific embodiment, the evaporator 1 includes shell 11 and is arranged in inside shell 11 Room 12 and vaporization chamber 13 are heated, the second feeding inlet of the primary heater 2 is connect with heating room 12, the secondary heater 3 Discharge port connect with vaporization chamber 13, the vaporization chamber 13 setting is provided at the top of the vaporization chamber 13 above heating room 12 Demister 14 is provided with two pieces of bafflers 18 relatively disposed in parallel up and down, this two pieces barriers on 12 inner sidewall of heating room It is formed with heating chamber 19 between plate 18, several vertical arrangement both ends are provided in the heating chamber 19 and extend through two pieces of bafflers Heating tube bundle 15, which 12 middle part of the heating room and is located at two pieces of barriers It is provided with a central circulating tube 16 up and down among plate 18, is provided on 12 lateral wall of heating room for being passed through heating Heating steam inlet tube 8 of the steam into heating chamber 19 is provided on 12 lateral wall of heating room and connect with 19 bottom of heating chamber Condensed water outlet pipe 9,16 top of the central circulating tube and be located in vaporization chamber 13 and be provided with evaporation deflector hemispherical 17, in the vaporization chamber 13 and it is located at the spray assemblies being provided with below demister 14 for 13 inner sidewall of spraying and sprinkling evaporation room.

By using above-mentioned technical proposal, under the circulation continuous heating of primary heater 2 and secondary heater 3, heat Material after is evaporated from the vaporization chamber 13 that the discharge port of secondary heater 3 enters evaporator 1, in order to further match The evaporative crystallization for closing material is provided with two pieces of bafflers 18 relatively disposed in parallel up and down on heating 12 inner sidewall of room, this two Heating chamber 19 is formed between block baffler 18, the material of a part of carburation by evaporation rises, and another part temperature is not enough to evaporate The material of vaporization, which drops in heating room 12, to be heated, and heats the insufficient material of temperature recycled inside room 12 from below It enters several vertical arrangements being arranged in heating chamber 19 and both ends extends through in the heating tube bundle 15 of two pieces of bafflers, add Heat pipe bundle 15 is located in heating chamber 19, is provided on heating 12 lateral wall of room for being passed through heating steam into heating chamber 19 Steam inlet tube 8 is heated, heating steam enters in heating chamber 19 by heating steam inlet tube 8 to temperature deficiency in heating tube bundle 15 Heated with the material of carburation by evaporation, set setting spaced in parallel to each other for several heating tube bundles 15, make its uniformly by Heat improves the contact area of heating, to rapidly carry out heating vaporization ascension, is upwardly into vaporization chamber 13, meanwhile, it is The carburation by evaporation of cooperation material, 12 middle part of heating room and being located among two pieces of bafflers 18 be provided with one up and down in Circulation pipe 16 is entreated, so that the insufficient material of temperature in vaporization chamber 13 is passed through central circulating tube 16 from top to bottom, while in heating chamber 19 Continuous heating effect under, temperature increases and the material that is heated reenters after heating tube bundle 15 from lower to upper simultaneously Into vaporization chamber 13, to accomplish the duration circulating-heating to material, guarantee to also improve material while heating effect Utilization rate and evaporative crystallization speed, improve production efficiency, and the condensed water being condensed out on heating tube bundle 15 is being added by setting The condensed water outlet pipe 9 connecting on 12 lateral wall of hot cell with 19 bottom of heating chamber exports, and prevents the accumulation of internal cooling water from absorbing heat Amount, causes the consumption of the energy, is provided with evaporation water conservancy diversion hemispherical above central circulating tube 16 and in vaporization chamber 13 Plate 17, the setting of evaporation deflector 17 hemispherical is on the one hand for avoiding the material after evaporation from entering directly into demister 14 In, it causes foam removal in the demister short time to be not thorough, influences the effect of foam removal, and play the role of lasting accumulation heat, rise To facilitate the evaporative crystallization of material, the material after on the other hand evaporating ascension is guided to steaming for heat in high vaporization chamber 13 On the inner sidewall for sending out room 13, it is equipped with and is used for 13 inside of spraying and sprinkling evaporation room in vaporization chamber 13 and below demister 14 The spray assemblies of wall, the appearance of material incrustation phenomenon on 13 inner sidewall of vaporization chamber after reducing evaporation, avoid the occurrence of heat transfer Deteriorate, circulating pressure rising, the reduction of unit vacuum degree, influence the phenomenon that unit operation efficiency, causes going out for larger economic loss It is existing.

In the utility model specific embodiment, the spray assemblies include the cyclic annular spray tube being arranged in vaporization chamber 13 21, it is circumferentially equally spaced from each other from being provided with several spray nozzles 22, the spray nozzle on ring-type spray tube 21 outer tube wall 22 output end is arranged towards 13 inner sidewall of vaporization chamber, is connected on the ring-type spray tube 21 for being continually fed into heated material Conduit 23.

By using above-mentioned technical proposal, after the material heating vaporization in vaporization chamber 13 rises, a part of material meeting The structure on 13 inner sidewall of vaporization chamber, the material after heating imported into the cyclic annular spray tube being arranged in vaporization chamber 13 from conduit 23 In 21, it is set on the spray to 13 inner sidewall of vaporization chamber of several spray nozzles 22 on cyclic annular 21 outer tube wall of spray tube, uses On the one hand material jet-action after heating is used to cooperate the phenomenon that preventing fouling, on the other hand reduce to evaporator 1 The influence of evaporation efficiency does not need the ejecta of special disposal spray nozzle 22, and spraying effect is good and does not need to clear up, and prevents The appearance of scale formation, it is simple and reliable for structure.

In the utility model specific embodiment, Matter Transfer pump 24 is provided on the outside of the shell 11, the material follows The output end of ring pump 24 is connect by conduit 23 with cyclic annular spray tube 21, and the input terminal of the Matter Transfer pump 24 is connected with charging Pipe 25, the one end of the feed pipe 25 far from Matter Transfer pump 24 is through shell 11 and extends in heating room 12.

By using above-mentioned technical proposal, in order to further decrease energy consumption, the material that heating is recycled is sprayed, Matter Transfer pump 24 is provided on the outside of shell 11, the output end of Matter Transfer pump 24 is connected by conduit 23 and cyclic annular spray tube 21 Connect, input terminal by feed pipe 25 with heat room 12 in material be connected to, thus Matter Transfer pump 24 under the action of, by into The material that expects pipe 25 extracts in heating room 12 enters in cyclic annular spray tube 21 through conduit 23, thus to the inner sidewall of vaporization chamber 13 Lasting spray is carried out, while the material after spray falls back in heating room 12 again and heated, while can also extract temperature The material that degree meets evaporating temperature enters directly into be evaporated in vaporization chamber 13, is improved the efficiency of evaporation, is accelerated whole production Speed.

In the utility model specific embodiment, the output end of the spray nozzle 22 tilts down setting, and and shell 11 central axes are in 45 degree of angles.

By using above-mentioned technical proposal, in order to further increase the effect of spray, 13 inner sidewall of vaporization chamber is avoided the occurrence of The phenomenon that fouling occur influences normal crystallization, and the output end of spray nozzle 22 is tilted down setting, and the axis with shell 11 Line is in 45 degree angles, which ensure that the effect maximization of spray, the angle of generation to the inner sidewall of vaporization chamber 13 into Row is reinforced being sprayed, and improves the effect of rinse spray.

In the utility model specific embodiment, it is connected with heater box 26 on the conduit 23, inside the heater box 26 It is provided with coil-like electric heating tube 27.

By using above-mentioned technical proposal, in order to accelerate the efficiency of evaporative crystallization, keep a part straight by the material of spray Evaporative crystallization is connect, heater box 26 is also connected on conduit 23, material adds after entering in heater box 26 by coil-like electricity It after the heating of heat pipe 27, enters back into vaporization chamber 13, which can be used for heated material, improve the efficiency of evaporative crystallization.

In the utility model specific embodiment, pass through Heat preservation between the primary heater 2 and secondary heater 3 Circulation pipe connection, the Heat preservation circulation pipe include outer tube 31 and inner tube 32, and the outer tube 31 includes successively setting from outside to inside The first insulating layer 301 and second thermal insulation layer 302 set, are provided with vacuum heat-insulation between the second thermal insulation layer 302 and inner tube 32 Layer 33.

By using above-mentioned technical proposal, in order to avoid occurring the loss of thermal energy during circulation, followed to reduce The heating efficiency of ring is connected to, thus recycling by Heat preservation circulation pipe between primary heater 2 and secondary heater 3 During heating, when the material of heating passes through Heat preservation circulation pipe, internal heat will not quickly become separated in flight, and reduce when transmitting Thermal losses, sets Heat preservation circulation pipe to include outer tube 31 and inner tube 32, and outer tube 31 includes setting gradually from outside to inside again The first insulating layer 301 and second thermal insulation layer 302, the heated material conveyed in inner tube 32 it is heat-insulated by second thermal insulation layer 302 Effect and then the first insulating layer 301 by 302 outside of second thermal insulation layer is arranged in are kept the temperature, and guarantor is further improved The heat-insulated effect of temperature, while vacuum heat-insulating layer 33 is also provided between second thermal insulation layer 302 and inner tube 32, make the loss of thermal energy It is preferably minimized, does not influence the efficiency and effect of circulating-heating material.

In the utility model specific embodiment, the axial direction in said inner tube 32 along Heat preservation circulation pipe is distributed in spiral shell The heating tube 34 of shape is revolved, the input terminal of the heating tube 34 is connected with steam lead 35 after sequentially passing through inner tube 32 and outer tube 31, The output end of the heating tube 34 is connected with out steam pipe 36 after sequentially passing through inner tube 32 and outer tube 31.

In the utility model specific embodiment, first insulating layer 301 be polyurethane foam or phenol formaldehyde foam, it is described Second thermal insulation layer 302 is glass fibre or asbestos.

By using above-mentioned technical proposal, the axial direction in inner tube 32 along Heat preservation circulation pipe is distributed with spiral Heating tube 34, the setting of the heating tube 34 is for heating the hydronic material by the conveying of Heat preservation circulation pipe, heating The input terminal of pipe 34 is connected with steam lead 35 after sequentially passing through inner tube 32 and outer tube 31, and the output end of heating tube 34 sequentially passes through Steam pipe 36 is connected with out after inner tube 32 and outer tube 31, hot steam enters in inner tube 32 from steam lead 35, with adding for conveying Thermal material exchanges heat, and the steam after the completion of exchanging heat is exported by going out steam pipe 36, on the one hand which improves material multi The heating efficiency of heating, keeps entire heating process quicker, on the other hand prevents temperature decline during transmitting from bringing Loss and reduce the reaction entirely heated, influence the speed of evaporative crystallization；In order to guarantee the effect of insulation, first is protected Warm layer 301 is set as polyurethane foam or phenol formaldehyde foam, sets glass fibre or asbestos for second thermal insulation layer 302, effectively Separate the transmitting of heat.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (9)

1. a kind of evaporating, concentrating and crystallizing system is connected with feeding-passage, level-one preheater, second level preheater in turn by feedstock direction And heat-exchange system, it is characterised in that: the heat-exchange system includes evaporator, primary heater, secondary heater and forces to follow Ring pump, the primary heater, forced circulation pump and secondary heater are followed in series to form loop, the discharging of second level preheater Mouth is connect with the first feeding inlet of primary heater, and the second feeding inlet of primary heater is connect with evaporator, secondary heater Discharge port connect with evaporator, the interconnecting piece of the discharge port of secondary heater and evaporator is higher than the feeding inlet of primary heater Be arranged with the interconnecting piece of evaporator, the caliber of the caliber of primary heater and secondary heater respectively with the entrance of forced circulation pump It is adapted.

2. a kind of evaporating, concentrating and crystallizing system according to claim 1, it is characterised in that: the evaporator include shell with And heating room inside housings and vaporization chamber are set, the second feeding inlet of the primary heater is connect with heating room, described The discharge port of secondary heater is connect with vaporization chamber, and the vaporization chamber setting is above heating room, setting at the top of the vaporization chamber Have a demister, be provided with two pieces of bafflers relatively disposed in parallel up and down on the indoor side wall of the heating, two pieces of bafflers it Between be formed with heating chamber, several vertical arrangement both ends are provided in the heating chamber and extend through the heating tubes of two pieces of bafflers Beam, several heating tube bundle settings spaced in parallel to each other in the middle part of the heating room and are located among two pieces of bafflers and are provided with one Central circulating tube up and down, it is described to heat the heating being provided on outdoor side wall for being passed through heating steam into heating chamber Steam inlet tube is provided with the condensed water outlet pipe connecting with heating chamber bottom, the central circulating tube on the outdoor side wall of the heating Top and it is located in vaporization chamber and is provided with evaporation deflector hemispherical, in the vaporization chamber and is located at setting below demister There are the spray assemblies for side wall in spraying and sprinkling evaporation room.

3. a kind of evaporating, concentrating and crystallizing system according to claim 2, it is characterised in that: the spray assemblies include setting Cyclic annular spray tube in vaporization chamber, it is circumferentially equally spaced from each other on the ring-type spray tube outer tube wall to spray from being provided with several sprays The output end of head, the spray nozzle is arranged towards vaporization chamber inner sidewall, is connected on the ring-type spray tube for persistently leading to Enter the conduit of heated material.

4. a kind of evaporating, concentrating and crystallizing system according to claim 3, it is characterised in that: the hull outside is provided with object Expect that circulating pump, the output end of the Matter Transfer pump are connect by conduit with cyclic annular spray tube, the input of the Matter Transfer pump End is connected with feed pipe, and the feed pipe runs through shell far from one end that Matter Transfer pumps and extends in heating room.

5. a kind of evaporating, concentrating and crystallizing system according to claim 3 or 4, it is characterised in that: the spray nozzle it is defeated Outlet tilts down setting, and is in 45 degree of angles with the central axes of shell.

6. a kind of evaporating, concentrating and crystallizing system according to claim 4, it is characterised in that: be connected with heating on the conduit Case, the heater box are internally provided with coil-like electric heating tube.

7. a kind of evaporating, concentrating and crystallizing system according to claim 1, it is characterised in that: the primary heater and second level It is connected between heater by Heat preservation circulation pipe, the Heat preservation circulation pipe includes outer tube and inner tube, the outer tube packet The first insulating layer set gradually from outside to inside and second thermal insulation layer are included, is provided with vacuum between the second thermal insulation layer and inner tube Thermal insulation layer.

8. a kind of evaporating, concentrating and crystallizing system according to claim 7, it is characterised in that: along Heat preservation in said inner tube Spiral heating tube is distributed in the axial direction of circulation pipe, and the input terminal of the heating tube connects after sequentially passing through inner and outer tubes Steam pipe is connected with out after having steam lead, the output end of the heating tube to sequentially pass through inner and outer tubes.

9. a kind of evaporating, concentrating and crystallizing system according to claim 7 or 8, it is characterised in that: first insulating layer is Polyurethane foam or phenol formaldehyde foam, the second thermal insulation layer are glass fibre or asbestos.