CN111821706A

CN111821706A - Electromagnetic induction evaporation concentrator

Info

Publication number: CN111821706A
Application number: CN202010833670.7A
Authority: CN
Inventors: 任长江
Original assignee: Shanghai Guijiang Electromechanical Technology Co ltd
Current assignee: Shanghai Guijiang Electromechanical Technology Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2020-10-27

Abstract

The invention belongs to the technical field of evaporation concentrators, and particularly relates to an electromagnetic induction evaporation concentrator which comprises an evaporation chamber, a separator, a first heating device and a second heating device, wherein the first heating device and the second heating device respectively comprise a magnetic conductive circular tube and an induction coil, the induction coil is wound on the magnetic conductive circular tube, and the induction coil is electrically connected with an alternating current induction power supply; the magnetic conduction round pipe of the first heating device is sleeved on the lower portion of the evaporation chamber, a secondary steam outlet of the evaporation chamber is communicated with a steam inlet of the separator, and the magnetic conduction round pipe of the second heating device is sleeved on a pipeline of a steam outlet of the separator. Has the advantages that: the electromagnetic induction evaporation concentrator omits a compressor and has low cost; the application range is wider; is more energy-saving than MVR; the efficiency is higher; when the organic solvent is evaporated and concentrated, the method is safe and reliable; the problem of noise pollution does not exist, and the silicate cotton plays a role in sound absorption; the replacement and maintenance are convenient and fast, and the service life is long.

Description

Electromagnetic induction evaporation concentrator

Technical Field

The invention belongs to the technical field of evaporation concentrators, and particularly relates to an electromagnetic induction evaporation concentrator.

Background

The evaporation concentrator plays a very important role in the production links of the industries such as traditional Chinese medicine, food, chemical industry, seawater desalination, zero discharge of wastewater and the like. The development history of the evaporation concentrator, the most original evaporation and decompression concentration → single effect → double effect → triple effect → multiple effect → MVR evaporation and concentration → heat pump evaporation and concentration. The development history of the evaporation concentrator aims to save energy, improve efficiency, reduce consumption and reduce emission, and especially the MVR evaporation concentration is obviously improved in the aspects of energy saving, efficiency improvement and automation.

For example, in a traditional evaporation concentrator, steam is used as a heat source, feed liquid is directly heated in a heat exchanger, steam is probably needed for evaporating water on one side, in order to protect the environment, the traditional boiler is limited to steam burning in the existing country, natural gas is required to be adopted, and the steam on one side is probably 350-450 yuan; the MVR evaporation concentration adopts steam to preheat equipment and feed liquid to evaporation temperature, water is generally heated to 95-98 ℃, secondary steam is generated in an evaporation chamber, at the moment, a compressor is started to heat and pressurize the secondary steam in the evaporation chamber, and the secondary steam heated and pressurized by the compressor is sent to a shell side of a heater to exchange heat with the feed liquid in a tube side of the heater. Only a small amount of steam needs to be replenished during the evaporation process. The MVR evaporation water is about 32-50 yuan. The operation cost of the MVR evaporation concentrator is one tenth of that of the traditional evaporation concentrator, the energy is saved obviously, and the floor area of the equipment can be reduced by more than half.

However, the existing MVR evaporation concentrator still has the following disadvantages and shortcomings: 1. the one-time investment of the equipment is large (compared with the traditional evaporator), the customer is difficult to accept, and the competitive advantage is not obvious; 2. the secondary steam is compressed by the compressor, the pressure and the temperature are increased, and the secondary steam is sent to the heating chamber of the evaporator to be used as heating steam, the compressor is a core device, the cost of the compressor is almost one third of the cost of the whole system, once a mechanical or electrical fault occurs, the whole system is paralyzed, the fault frequency is high, and the maintenance and replacement period is long; 3. the feed liquid and the equipment are preheated before the system is started, a large amount of steam is needed, a small amount of steam is needed during operation, the steam cost is still high, and the system cannot be used in some enterprises without steam; 4. the system operation is that the noise is big, and noise pollution is serious to enterprise's staff injury health, according to the difference of system size and operating mode, and the noise is mostly more than 95 decibels.

Disclosure of Invention

The invention provides an electromagnetic induction evaporation concentrator, aiming at solving the problems that the MVR evaporation concentrator in the prior art is high in one-time investment cost, needs external steam, and is large in size, inconvenient in equipment maintenance and high in noise.

In order to solve the technical problems, the invention adopts the following technical scheme that the electromagnetic induction evaporation concentrator comprises an evaporation chamber, a separator, a first heating device and a second heating device, wherein the first heating device and the second heating device respectively comprise a magnetic conduction round pipe and an induction coil, the induction coil is wound on the magnetic conduction round pipe, and the induction coil is electrically connected with an alternating current induction power supply; the magnetic conduction round pipe of the first heating device is sleeved on the lower portion of the evaporation chamber, a secondary steam outlet of the evaporation chamber is communicated with a steam inlet of the separator, and the magnetic conduction round pipe of the second heating device is sleeved on a pipeline of a steam outlet of the separator.

Preferably, the material of the magnetic conduction round pipe is stainless steel 410. Because of the material of current evaporative concentrator mostly adopts stainless steel, duplex steel and the titanium material that carbon composition content is low, and the magnetic conductivity is poor, and just heating efficiency is low as a result, and energy consumption loss is big, increases equipment input cost, and stainless steel 410 is chooseed for use to the material of the magnetic conduction pipe of this application, and stainless steel 410's carbon composition content is high, overlaps the magnetic conduction pipe and establishes the place that this evaporative concentrator needs the heating in order to solve this problem.

Preferably, the magnetic conduction round pipe is wrapped with the silicate cotton, the silicate cotton is located between the magnetic conduction round pipe and the induction coil, the induction coil is a high-temperature cable, and the induction coil is wound and fixed by a high-temperature adhesive tape or an aluminum foil adhesive tape. The alternating current flowing through the induction coil generates an alternating magnetic field passing through the magnetic conduction round tube, the magnetic field enables the magnetic conduction round tube to generate eddy current for heating, and the aluminum foil adhesive tape also has the effects of preventing magnetic leakage and reducing energy loss; the silicate cotton plays the roles of heat preservation, heat insulation and sound absorption, and the use safety and stability of the first heating device and the second heating device are improved.

Preferably, the first heating device and the second heating device are both enclosed by a stainless steel housing. The stainless steel is 304 stainless steel with the thickness of 1mm, and is packaged by the stainless steel, so that the first heating device and the second heating device are effectively protected, the service lives of the first heating device and the second heating device are prolonged, and the appearance is beautified.

Preferably, the shell is of a split structure, and the shell is fastened and fixed by a first bolt. The shell of the split structure is convenient to detach and replace and maintain.

Preferably, the shell is in two semicircular structures, and the shell of the first heating device is fixedly arranged at the lower part of the evaporation chamber through screws; the shell of the second heating device further comprises flange plates positioned at two ends of the shell, the flange plates are sleeved on a pipeline of a steam outlet of the separator, and the shell is fixedly connected to the flange plates through the first bolts. The shell has simple and reliable structure and lower manufacturing and assembling cost.

Preferably, the magnetic conduction round pipe is of a split structure and is fastened and fixed by a second bolt. The material of the magnetic conduction round pipe is stainless steel 410 with the thickness of 2 mm-4 mm (the carbon content is high, the heating effect is good, the production environment requirement is met), the magnetic conduction round pipe with a split type structure is convenient to detach, and the replacement and the maintenance are convenient.

Preferably, the magnetic conduction round pipe is of two semicircular structures, the two semicircular structures of the magnetic conduction round pipe are provided with matched connecting portions, and the second bolt locks and fixes the magnetic conduction round pipe through the connecting portions. The magnetic conduction round pipe has simple and reliable structure and lower manufacturing and assembling cost.

The electromagnetic induction evaporation concentrator further comprises a heating chamber, a condensate tank, a raw material tank, a circulating pump, a raw material pump and a vacuum pump, wherein a preheating coil is arranged in the condensate tank, and the raw material pump is used for pumping the raw material in the raw material tank to the preheating coil; a feed inlet of the circulating pump is respectively communicated with a liquid outlet of the preheating coil and a circulating port of the evaporation chamber, and a discharge outlet of the circulating pump is communicated with a tube side of the heating chamber; the shell side of the heating chamber is communicated with a steam outlet of the separator, and the second heating device is positioned between the heating chamber and the separator; the lower seal head liquid outlet, the vapor-liquid balance outlet and the condensed water outlet of the heating chamber are positioned at the lower part of the heating chamber and are sequentially arranged from bottom to top; and the heating chamber and the condensate tank are both connected with a vacuum pump.

Furthermore, the electromagnetic induction evaporation concentrator also comprises a concentrated liquid pump and a condensed liquid pump, wherein the concentrated liquid pump is connected with a discharge hole of the evaporation chamber and is used for discharging concentrated liquid in the evaporation chamber; and the condensate pump is connected with a condensate outlet of the condensate tank and is used for discharging condensate in the condensate tank.

The electromagnetic induction evaporation concentrator has the following beneficial effects:

1. the cost is low: the cost of one compressor of the MVR is hundreds of thousands to millions; the cost of an induction heat source of the electromagnetic induction evaporation concentrator is different from one tenth to one hundredth of a compressor;

2. the application range is wider: the whole process of the electromagnetic induction evaporation concentrator does not need any steam source;

3. energy consumption is saved: the efficiency of an MVR evaporation concentration compressor (a Roots compressor) is generally only about 78%, and the efficiency of the electromagnetic induction evaporation concentrator is generally more than 95% (along with the continuous improvement and perfection of the material of a heated body and the infinite approaching of 100% of the updating of an induction power supply);

4. the efficiency is higher: the temperature rise of an MVR evaporation concentration compressor (a Roots compressor) is 8-18 degrees (the centrifugal compression can reach 25 degrees); the temperature rise of the induction evaporation concentration of the electromagnetic induction evaporation concentrator is from normal temperature to more than 300 ℃ for three minutes to five minutes, so that the heating area of the equipment can be relatively reduced in a large temperature rise range, the cost investment of the equipment can also be reduced, the occupied area can also be reduced, and the competitive advantage is greatly improved;

5. when the organic solvent is evaporated and concentrated, the method is safe and reliable: the secondary steam is also inflammable and explosive steam, when MVR is used for evaporation and concentration, the steam enters a cavity of a compressor, most of the compressors are two-blade or three-blade impellers, the impellers rotate at high speed, and the steam, the impellers and the cavity rub against each other, so that potential safety hazards exist; the electromagnetic induction evaporation concentrator has no potential safety hazard;

6. the electromagnetic induction evaporation concentrator has no compressor, and has no noise pollution problem, and the silicate cotton plays a role in sound absorption;

7. it is convenient to change the maintenance, long service life: the existing MVR evaporation concentration compressor is a core device, and has the disadvantages of high cost, high failure frequency, long maintenance period, large volume and inconvenient maintenance and replacement; the induction heat source of the electromagnetic induction evaporation concentrator is designed and processed with the maintenance and replacement problems taken into consideration, the movable connection form is carried out from machinery to electrical appliances, the replacement is convenient, a heating part for reducing the production cost and improving the product quality adopts a special cable structure, the heat is not generated, the temperature of more than 500 ℃ can be borne, the service life can reach more than 5 years, and the later period basically has no maintenance cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of the structure of an electromagnetic induction evaporative concentrator of the present invention;

FIG. 2 is a schematic view of a part of the construction in FIG. 1, wherein the raw material tank and the raw material pump are not shown;

FIG. 3 is a schematic structural view of a vaporizing chamber portion in FIG. 1;

FIG. 4 is an exploded schematic view of a first heating means of the electromagnetic induction evaporative concentrator of the present invention;

FIG. 5 is an exploded schematic view of a second heating means of the electromagnetic induction evaporative concentrator of the present invention;

in the figure: 1. the device comprises an evaporation chamber, 2, a separator, 3, a first heating device, 3-1, a magnetic conduction round pipe, 3-1-1, a connecting part, 3-2, an induction coil, 3-3, a shell, 3-4, a second bolt, 4, a second heating device, 4-1, a flange plate, 5, a heating chamber, 6, a condensate tank, 6-1, a preheating coil, 7, a raw material tank, 8, a circulating pump, 9, a raw material pump, 10, a concentrate pump, 11, a condensate pump, 12 and a pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 4, an electromagnetic induction evaporative concentrator includes an evaporation chamber 1, a separator 2, a first heating device 3 and a second heating device 4, wherein each of the first heating device 3 and the second heating device 4 includes a magnetic conductive circular tube 3-1 and an induction coil 3-2, the induction coil 3-2 is wound on the magnetic conductive circular tube 3-1, the induction coil 3-2 is electrically connected to an alternating current induction power supply, the alternating current induction power supply provides alternating current for the induction coil 3-2, the alternating current flowing through the induction coil 3-2 generates an alternating magnetic field passing through the magnetic conductive circular tube 3-1, and the magnetic field causes the magnetic conductive circular tube 3-1 to generate eddy current for heating; the magnetic conduction round pipe 3-1 of the first heating device 3 is sleeved on the lower portion of the evaporation chamber 1, a secondary steam outlet of the evaporation chamber 1 is communicated with a steam inlet of the separator 2, the separator 2 is a steam-liquid separator 2, and the magnetic conduction round pipe 3-1 of the second heating device 4 is sleeved on a pipeline 12 of a steam outlet of the separator 2. Stainless steel 410 is selected for use to the material of magnetic conduction pipe 3-1, and stainless steel 410 thickness of this embodiment is 2mm ~ 4mm, and stainless steel, duplex steel and the titanium material that carbon composition content is low are mostly adopted to the material because of current evaporative concentration ware, and the magnetic conductivity is poor, and consequently heating efficiency is low, and energy loss is big, increases equipment input cost, and stainless steel 410 is selected for use to the material of the magnetic conduction pipe 3-1 of this application, and stainless steel 410's carbon composition content is high, overlaps the magnetic conduction pipe cover and establishes the place that this evaporative concentration ware needs heating in order to solve this problem.

The electromagnetic induction evaporation concentrator also comprises a heating chamber 5, a condensate tank 6, a raw material tank 7, a circulating pump 8, a stock solution pump 9, a vacuum pump, a concentrate pump 10 and a condensate pump 11, wherein a preheating coil 6-1 is arranged in the condensate tank 6, and the stock solution pump 9 is used for pumping the stock solution in the raw material tank 7 to the preheating coil 6-1; a feed inlet of the circulating pump 8 is respectively communicated with a liquid outlet of the preheating coil 6-1 and a circulating port of the evaporation chamber 1, and a discharge outlet of the circulating pump 8 is communicated with a tube pass of the heating chamber 5 through a feed inlet of an upper end socket of the heating chamber; the shell side of the heating chamber 5 is communicated with the steam outlet of the separator 2, and the second heating device 4 is positioned between the heating chamber 5 and the separator 2; the lower end socket liquid outlet, the vapor-liquid balance outlet and the condensed water outlet of the heating chamber 5 are positioned at the lower part of the heating chamber 5 and are sequentially arranged from bottom to top, the lower end socket liquid outlet and the vapor-liquid balance outlet of the heating chamber 5 are both communicated with the evaporation chamber 1, and the condensed water outlet of the heating chamber 5 is communicated with the condensed water tank 6; the heating chamber 5 and the condensate tank 6 are both connected with a vacuum pump (not shown in the figure); the concentrated liquid pump 10 is connected with a discharge hole of the evaporation chamber 1 and is used for discharging concentrated liquid in the evaporation chamber 1; the condensate pump 11 is connected with a condensate outlet of the condensate tank 6 and is used for discharging condensate in the condensate tank 6.

As shown in fig. 4 and 5, the magnetic conductive circular tube 3-1 is wrapped with silicate cotton (not shown), the silicate cotton is located between the magnetic conductive circular tube 3-1 and the induction coil 3-2, the induction coil 3-2 is a high-temperature cable, the induction coil 3-2 is wound and fixed by a high-temperature adhesive tape or an aluminum foil adhesive tape (not shown), and the aluminum foil adhesive tape also has the effects of preventing magnetic leakage and reducing energy loss; the silicate cotton plays the roles of heat preservation, heat insulation and sound absorption, and the use safety and stability of the first heating device and the second heating device are improved. The first heating device 3 and the second heating device 4 are both packaged by stainless steel shells 3-3, 304 stainless steel with the thickness of 1mm is selected as the stainless steel, the first heating device 3 and the second heating device 4 are effectively protected, the service lives of the first heating device and the second heating device are prolonged, and the appearance is beautified.

In order to facilitate disassembly and replacement and maintenance, the shell 3-3 is a split structure, the shell 3-3 is fastened and fixed by a first bolt (not shown), specifically, the shell 3-3 is in two semicircular structures, and the shell 3-3 of the first heating device 3 is fixedly arranged at the lower part of the evaporation chamber 1 by a screw (not shown); the shell 3-3 of the second heating device 4 further comprises flange plates 4-1 positioned at two ends of the shell, the flange plates 4-1 are sleeved on a pipeline 12 of a steam outlet of the separator 2, and the shell 3-3 is fixedly connected to the flange plates 4-1 through the first bolts; the magnetic conduction round pipe 3-1 is also of a split structure, the magnetic conduction round pipe 3-1 is fastened and fixed by a second bolt 3-4, specifically, the magnetic conduction round pipe 3-1 is of two semicircular structures, the two semicircular structures of the magnetic conduction round pipe 3-1 are provided with connecting parts 3-1-1 which are matched, and the second bolt 3-4 locks and fixes the magnetic conduction round pipe 3-1 through the connecting parts 3-1-1.

The working principle is as follows:

firstly, a raw material pump 9 pumps a material liquid from a raw material groove 7 to a preheating coil 6-1, a circulating pump 8 pumps the preheated material liquid in a condensate tank 6 to a tube pass of a heating chamber 5, meanwhile, a first heating device 3 preheats the material liquid in an evaporation chamber 1, when secondary steam is heated (such as water at 90-98 ℃), a vacuum pump vacuumizes the heating chamber 5 to enable the secondary steam to sequentially pass from the evaporation chamber 1, a separator 2 to a second heating device 4, the second heating device 4 heats the secondary steam again to raise the temperature and boost the pressure, the secondary steam enters a shell pass of the heating chamber 5, at the moment, the secondary steam in the shell pass of the heating chamber 5 exchanges heat with the raw material liquid in the tube pass of the heating chamber 5, the secondary steam in the shell pass of the heating chamber 5 forms condensate water, meanwhile, the vacuum pump vacuumizes the condensate tank 6, the condensate water in the shell pass of the heating chamber 5 flows into the condensate tank 6 from a condensate outlet of, the raw liquid in the preheating coil 6-1 is preheated by the condensate water with waste heat, after the feed liquid in the preheating coil 6-1 is preheated by the condensate water, the condensate water in the condensate liquid tank 6 is discharged by the condensate liquid pump 11, zero sewage discharge is realized, the temperature of the original condensate liquid to be discarded is fully utilized, the latent heat is recovered, and the heat efficiency is improved; the feed liquid heated by the secondary steam in the tube pass of the heating chamber 5 flows to the evaporation chamber 1 from the lower head liquid outlet of the heating chamber 5, meanwhile, the mixed feed liquid of the vapor phase and the liquid phase flows to the evaporation chamber 1 from the vapor-liquid balance outlet of the heating chamber 5, at the moment, the circulating pump 8 pumps the feed liquid with low upper concentration in the evaporation chamber 1 to the tube pass of the heating chamber 5 for circulation, so that the feed liquid maintains the evaporation state, the evaporation efficiency is improved, the energy consumption is reduced, the feed liquid reaching the concentration set value in the evaporation chamber 1 is discharged out of the evaporation concentrator by the concentrated liquid pump 10.

The working principle of the first heating device 3 and the second heating device 4 is as follows: high-frequency alternating current generated by an alternating current induction power supply generates an alternating magnetic field through an induction coil 3-2, a magnetic conduction circular tube 3-1 is arranged in the induction coil to cut alternating magnetic lines, so that alternating current (namely eddy current) is generated inside the magnetic conduction circular tube 3-1, the eddy current enables atoms inside an object to move randomly at a high speed, and the atoms collide and rub with each other to generate heat energy, so that the effect of heating the magnetic conduction circular tube 3-1 is achieved, namely, the heating mode is achieved by converting electric energy into magnetic energy and enabling the heated magnetic conduction circular tube 3-1 to sense the magnetic energy to generate heat. The induction coil 3-2 and the magnetic conduction round tube 3-1 are completely closed in a physical space of 360 degrees, so that the heating efficiency is particularly high and is generally over 95 percent. Traditional heating trade, the universal adoption be resistance wire and quartzy heating methods, and this kind of traditional heating methods, its thermal efficiency is than lower, resistance wire and quartzy mainly lean on the circular telegram back, self generate heat then again heat transfer to the feed cylinder on to play the effect of heating article, the heat utilization ratio of this kind of heating effect is only about 50% at most, in the air is all gived off to the heat about 50% in addition, the electric energy loss of traditional resistance wire heating methods reaches more than 50%. And through electromagnetic induction heating, through the electric current magnetic field that produces for iron metal pipeline self generates heat, and thermal-insulated material in addition prevents giving off of pipeline heat, and the heat utilization ratio is up to more than 95%. The induction heat source of the electromagnetic induction evaporation concentrator replaces a compressor of a traditional evaporation concentrator, and secondary steam from the evaporation chamber 1 to the heating chamber 5 is heated again to raise the temperature and pressure.

Because the temperature of the secondary steam is improved by the second heating device 4 by 15 degrees at least on the original basis, the secondary steam in the shell pass of the heating chamber 5 exchanges heat with the stock solution in the tube pass of the heating chamber 5, and because the temperature difference between a vapor phase and a liquid phase is more than 15 degrees for exchanging heat, the secondary steam is changed into condensed water in the shell pass of the heating chamber 5 and flows into the condensed water tank 6, and the preheating coil 6-1 preheats the feed liquid, so that the heat loss of the whole system is small and the energy is saved;

the first heating device 3 and the second heating device 4 of the invention can also be used for extraction tanks (static extraction, dynamic extraction, multifunctional extraction), climbing film type evaporation concentrators (materials enter from bottom to top or enter from bottom to bottom on the tube pass of a heater) and heat sources of rectification equipment.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims

1. An electromagnetic induction evaporation concentrator, its characterized in that: the device comprises an evaporation chamber (1), a separator (2), a first heating device (3) and a second heating device (4), wherein the first heating device (3) and the second heating device (4) respectively comprise a magnetic conduction round tube (3-1) and an induction coil (3-2), the induction coil (3-2) is wound on the magnetic conduction round tube (3-1), and the induction coil (3-2) is electrically connected with an alternating current induction power supply; the magnetic conduction round pipe (3-1) of the first heating device (3) is sleeved on the lower portion of the evaporation chamber (1), a secondary steam outlet of the evaporation chamber (1) is communicated with a steam inlet of the separator (2), and the magnetic conduction round pipe (3-1) of the second heating device (4) is sleeved on a pipeline (12) of a steam outlet of the separator (2).

2. The electromagnetic induction evaporative concentrator of claim 1, wherein: the material of the magnetic conduction round tube (3-1) is stainless steel 410.

3. The electromagnetic induction evaporative concentrator of claim 2, wherein: the magnetic conduction round pipe (3-1) is wrapped with silicate cotton, the silicate cotton is located between the magnetic conduction round pipe (3-1) and the induction coil (3-2), the induction coil (3-2) is made of high-temperature cables, and the induction coil (3-2) is wound and fixed by a high-temperature adhesive tape or an aluminum foil adhesive tape.

4. The electromagnetic induction evaporative concentrator of claim 3, wherein: the first heating device (3) and the second heating device (4) are both encapsulated by stainless steel shells (3-3).

5. The electromagnetic induction evaporative concentrator of claim 4, wherein: the shell (3-3) is of a split structure, and the shell (3-3) is fastened and fixed by a first bolt.

6. The electromagnetic induction evaporative concentrator of claim 5, wherein: the shell (3-3) is of two semicircular structures, and the shell (3-3) of the first heating device (3) is fixedly arranged at the lower part of the evaporation chamber (1) through screws; the shell (3-3) of the second heating device (4) further comprises flange plates (4-1) located at two ends of the shell, the flange plates (4-1) are sleeved on a pipeline (12) of a steam outlet of the separator (2), and the shell (3-3) is fixedly connected onto the flange plates (4-1) through the first bolts.

7. The electromagnetic induction evaporative concentrator of claim 2, wherein: the magnetic conduction round pipe (3-1) is of a split structure, and the magnetic conduction round pipe (3-1) is fastened and fixed by a second bolt (3-4).

8. The electromagnetic induction evaporative concentrator of claim 7, wherein: the magnetic conduction round pipe (3-1) is of two semicircular structures, the two semicircular structures of the magnetic conduction round pipe (3-1) are provided with connecting parts (3-1-1) which are matched with each other, and the second bolt (3-4) locks and fixes the magnetic conduction round pipe (3-1) through the connecting parts (3-1-1).

9. The electromagnetic induction evaporative concentrator of any one of claims 1 to 8, wherein: the electromagnetic induction evaporation concentrator also comprises a heating chamber (5), a condensate tank (6), a raw material tank (7), a circulating pump (8), a raw material pump (9) and a vacuum pump, wherein a preheating coil (6-1) is arranged in the condensate tank (6), and the raw material pump (9) is used for pumping the raw material in the raw material tank (7) to the preheating coil (6-1); a feed inlet of the circulating pump (8) is respectively communicated with a liquid outlet of the preheating coil (6-1) and a circulating port of the evaporation chamber (1), and a discharge outlet of the circulating pump (8) is communicated with a tube pass of the heating chamber (5); the shell side of the heating chamber (5) is communicated with the steam outlet of the separator (2), and the second heating device (4) is positioned between the heating chamber (5) and the separator (2); the lower seal head liquid outlet, the vapor-liquid balance outlet and the condensed water outlet of the heating chamber (5) are positioned at the lower part of the heating chamber (5) and are sequentially arranged from bottom to top, the lower seal head liquid outlet and the vapor-liquid balance outlet of the heating chamber (5) are communicated with the evaporation chamber (1), and the condensed water outlet of the heating chamber (5) is communicated with the condensed water tank (6); and the heating chamber (5) and the condensate tank (6) are both connected with a vacuum pump.

10. The electromagnetic induction evaporative concentrator of claim 9, wherein: the electromagnetic induction evaporation concentrator also comprises a concentrated liquid pump (10) and a condensed liquid pump (11), wherein the concentrated liquid pump (10) is connected with a discharge hole of the evaporation chamber (1) and is used for discharging concentrated liquid in the evaporation chamber (1); and the condensate pump (11) is connected with a condensate outlet of the condensate tank (6) and is used for discharging condensate in the condensate tank (6).