CN109618439B - Star-star type three-phase induction thermal reactor - Google Patents
Star-star type three-phase induction thermal reactor Download PDFInfo
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- CN109618439B CN109618439B CN201811607070.8A CN201811607070A CN109618439B CN 109618439 B CN109618439 B CN 109618439B CN 201811607070 A CN201811607070 A CN 201811607070A CN 109618439 B CN109618439 B CN 109618439B
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- 230000006698 induction Effects 0.000 title claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims abstract description 72
- 238000010168 coupling process Methods 0.000 claims abstract description 55
- 238000005859 coupling reaction Methods 0.000 claims abstract description 55
- 230000008878 coupling Effects 0.000 claims abstract description 51
- 239000012429 reaction media Substances 0.000 claims abstract description 35
- 230000005284 excitation Effects 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000004020 conductor Substances 0.000 claims abstract description 10
- 230000004907 flux Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 230000035699 permeability Effects 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 2
- 230000009969 flowable effect Effects 0.000 claims description 2
- 238000005112 continuous flow technique Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 12
- 230000009471 action Effects 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 239000011162 core material Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 239000012526 feed medium Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
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Abstract
The invention discloses a star-star three-phase induction thermal reactor, belonging to the technical field of chemical industry, food and environment. The method comprises the following steps: three-column magnetic circuit, excitation coil, magnetic coupling pipe, reaction chamber. Wherein the sample inlet and the sample outlet are arranged at the connection intersection of the magnetic coupling pipe group or the reaction chamber group. Each group of magnetic coupling pipes and the reaction chamber are connected in a three-phase star shape, and the connection of the magnetic coupling pipe group and the reaction chamber group is in a star-star structure; so that the conductive materials or reaction media in the reaction chamber can generate higher effective potential difference, the effective potential difference is derived from the line voltage of the three-phase circuit, and the value of the effective potential difference is that of the normal phase voltage
The star-star three-phase induction thermal reactor has the advantages that the temperature rise efficiency of the feed liquid or the reaction medium is higher, the efficient heating of the sample is realized without external heat source or radiation and without the action of an external electrode, the star-star three-phase induction thermal reactor has a single sample inlet and a single sample outlet, the liquid holdup of the reaction chamber is large, and the treatment capacity is higher under the same sample inlet flow.
Description
Technical Field
The invention relates to a star-star three-phase induction thermal reactor, belonging to the technical field of chemical industry, food and environment.
Background
Magnetic permeability, which is a physical quantity characterizing the magnetism of a magnetic medium; it represents the resistance of the magnetic flux generated or its ability to conduct magnetic lines in a magnetic field after a current flows through a coil in space or in the core material. When placed in an alternating magnetic field, a substance with magnetic permeability responds to the alternating magnetic field, an induced current is generated, and a heat effect is generated, namely an eddy current effect.
According to the principle, the premise that the substance is heated by using the eddy current effect is that the substance has magnetic permeability; for substances with near-zero magnetic permeability, such as liquid samples, the eddy current effect cannot be directly utilized for electric heating treatment at present, and other electric field heating treatment modes, such as an ohmic heating mode, need to be adopted at this moment.
In the fields of chemical industry, food and environment, the liquid to be treated has certain acid and alkali corrosivity, and if the liquid is subjected to ohmic heating treatment, a metal polar plate is adopted to generate heat, so that the problem of metal pollution of a sample can be caused.
Disclosure of Invention
In order to realize heating of liquid with low magnetic conductivity (the magnetic conductivity is close to zero) by using an eddy current effect and simultaneously avoid the problem that the liquid is polluted by electrochemical corrosion of polar plates, the invention provides a star-star type three-phase induction thermal reactor with a simple flow path structure, wherein a continuous flow low magnetic conductivity material or a reaction medium based on a three-phase circuit structure is excited by alternating magnetic flux in a three-phase three-column magnetic circuit to generate heat rapidly; the star-star three-phase induction thermal reactor has a single sample inlet and a single sample outlet, the reaction chamber has large liquid holdup, and the star-star three-phase induction thermal reactor has higher treatment capacity under the same sample introduction flow.
A first object of the present invention is to provide a star-star type three-phase induction thermal reactor comprising: three-column magnetic circuit, excitation coil, magnetic coupling tube, reaction chamber;
the sample inlet and the sample outlet are arranged at the connection intersection of the magnetic coupling pipe group or the reaction chamber group, so that the retention time of continuous flow materials or reaction media of each branch in the reaction chamber is ensured to be equal;
the three-column magnetic circuit is made of a magnetic conductive material, and the excitation coil is wound on the three-column magnetic circuit;
the three magnetic coupling pipes are in a group and are connected in a star shape, and each group of magnetic coupling pipes is respectively wound on three iron core columns of the three-column magnetic circuit;
the three reaction chambers are in a group and are connected in a star shape;
the star-star type three-phase induction thermal reactor comprises at least one group of magnetic coupling pipes and at least one group of reaction chambers; the magnetic coupling tube group is connected with the reaction chamber group.
In one embodiment, after the power supply applies three-phase voltage to the excitation coil, the total magnetic flux carried by each core limb in the three-limb magnetic circuit is in the range of 0-10Wb, and the initial permeability of the material of the three-limb magnetic circuit is 800-.
In one embodiment, the reaction chamber and the magnetic coupling tube are supports for the flow of the reaction medium and have electrical insulation, and the inner diameter of the reaction chamber is smaller than the inner diameter of the magnetic coupling tube.
In one embodiment, the ratio of the cross-sectional area of the reaction chamber to the cross-sectional area of the magnetic coupling tube is 1:1.3 to 1: 50.
In one embodiment, the sample inlet is located at a junction of the magnetic coupled tube set; the sample outlet is positioned at the connection intersection of the reaction chamber groups, instantaneous induced voltages at two ends of each reaction chamber are opposite in polarity, the alternating magnetic field in the three-column magnetic circuit can trigger low-permeability conductive materials or reaction media in the magnetic coupling pipe to generate effective potential difference, and the induced current density of the materials or the reaction media in the reaction chambers is 1-120A/cm2To cause the sample to heat up rapidly.
In one embodiment, the conductivity of the feed or reaction medium is in the range of from 0.1 to 40S/m.
In one embodiment, the induced current loop only exists between the magnetic coupling tube and the reaction chamber, and the sample inlet and the sample outlet are leakage-free and safe.
A second object of the present invention is to provide a heating apparatus using the above star-star type three-phase induction thermal reactor, which heats a material having an electric conductivity in the range of 0.1 to 40S/m.
In one embodiment, the substance is a flowable substance.
A third object of the present invention is to provide the use of the above star-star type three-phase induction thermal reactor and/or of the above heating device in the chemical, food and environmental fields.
The core parameters of the star-star three-phase induction thermal reactor provided by the invention are initial permeability of a magnetic conductive material of a three-column magnetic circuit and total magnetic flux phi capable of being carried, wherein the total magnetic flux phi is equal to the product of magnetic flux density B of each iron core column in the three-column magnetic circuit and effective magnetic conductive area S of each iron core column in the three-column magnetic circuit, namely phi is BS. The voltage ratio between the excitation coil and the magnetic coupling tube follows the faraday's electromagnetic induction principle. Meanwhile, the impedance Z of the material or the reaction medium in the reaction chamber can be tested by adopting an impedance analyzer so as to calculate the induced current density J according to the ohm law, namely I is U/Z, J is I/S, and the induced voltage at two ends of the U-reaction chamber is the effective potential difference; i-intensity of induced current in the reaction chamber; s-the cross-sectional area of the reaction chamber. The star-star three-phase induction thermal reactors can be connected in series in a modular manner to improve the processing efficiency of continuous flow materials or reaction media.
The invention has the beneficial effects
The star-star three-phase induction thermal reactor provided by the invention is designed based on the operation rule of a power system, and a three-phase three-column iron core magnetic circuit is adopted as an alternating magnetic field passage. The three magnetic coupling pipes and the three reaction chambers are connected in a star shape of a three-phase circuit, so that the conductive materials or reaction media in the reaction chambers can generate higher effective potential difference, the effective potential difference is derived from the line voltage of the three-phase circuit, and the value of the effective potential difference is that of the normal phase voltage
And the temperature rise efficiency of the feed liquid or the reaction medium is higher. Therefore, the sample processing by using the three-phase induction thermal reactor can avoid the bad problems in the traditional ohmic heating, and simultaneously, the conductive materials or the reaction medium can be efficiently heated under the action of no external heat source or radiation and no external electrode. Furthermore, the star-star type three-phase induction thermal reactor has a single sample inlet and a single sample outlet, is simple in flow path structure, is large in liquid holdup of the reaction chamber, and has higher treatment capacity under the same sample introduction flow.
Working principle of the invention
The principle of the three-phase induction thermal reactor is that the magnetic potential difference and the induction current in the materials or reaction media are amplified by utilizing the alternating magnetic field in the three-column magnetic circuit and combining the operation rule of a power system, so that the materials or the reaction media can generate heat quickly.
Drawings
In order to more clearly illustrate the technical solutions in 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 a star-star type induction thermal reactor I;
FIG. 2 is a schematic diagram of a star-star connection of a three-phase circuit configuration;
wherein, the star-star type three-phase induction thermal reactor I; 101-three-column magnetic circuit; 102-a field coil; 103-magnetic coupling pipe group (in star connection); 104-reaction chamber group (in star connection); 201-a sample inlet; 202-sample outlet.
Detailed Description
In view of the defects in the prior art, the inventor of the present application has made extensive research and practice to propose the technical solution of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
Example 1
The star-star type three-phase induction thermal reactor I, as shown in fig. 1, includes a three-column magnetic circuit 101, an excitation coil 102, a magnetic coupling tube set 103, and a reaction chamber set 104; wherein the magnetic coupling pipe group 103 is in star connection; the reaction chamber set 104 is also star-coupled; the sample inlet 201 and the sample outlet 202 are disposed at the connection intersection of the magnetic coupling tube set 103 or the reaction chamber set 104, and this embodiment takes as an example that the sample inlet 201 is located at the connection intersection of the magnetic coupling tube set 103, and the sample outlet 202 is located at the connection intersection of the reaction chamber set 104;
the excitation coil 102 is wound on each core limb of the three-column magnetic circuit 101, the number of turns of the excitation coil 102 on each core limb is 6, a mean voltage of 500V is applied to the excitation coil 102 by adopting a three-phase power supply, the magnetic flux of each core limb in the three-column magnetic circuit 101 is 0.06Wb, at this time, the magnetic conductive material of the three-column magnetic circuit 101 is cold-rolled silicon steel, the initial relative magnetic permeability is 1000, and the magnetic flux density during operation is 1.2T.
The effective magnetic conduction sectional area of each iron core column in the three-column magnetic circuit 101 is 0.05m2(ii) a Three star-shaped connected magnetic coupling pipes form a magnetic coupling pipe group 103 and are wound on each iron core column of the three-column magnetic circuit 101, and the number of turns of each magnetic coupling pipe is 36;
the three reaction chambers form a reaction chamber group 104 based on star connection, the three magnetic coupling pipes form a magnetic coupling pipe group 103 based on star connection, and the magnetic coupling pipe group 103 and the reaction chamber group 104 are used as supports of continuously flowing reaction media;
as shown in fig. 2, the connection between the magnetic coupling tube set 103 and the reaction chamber set 104 is in a star-star connection form based on a three-phase circuit structure; each reaction chamber has a cross-sectional area of 0.36cm2Each magnetic coupling pipe has a cross-sectional area of 1cm2Reaction medium with conductivity of 2.35S/m (e.g. 25 deg.C, 0.2% HCl and 0.3% Na)2CO3) When the reaction medium is pumped and flows through the reaction chamber group 104, the effective potential difference at both ends of each reaction chamber is 5142V, the length of each reaction chamber in the reaction chamber group 104 is 20cm, the impedance is 2000 Ω when the reaction medium fills each reaction chamber, the induced current is 2.57A, and the induced current density is 7.14A/cm2。
The sample inlet 201 for the reaction medium is located at the junction of the star-couplings of the magnetic coupling tube set 103, and the sample outlet 202 for the reaction medium is located at the junction of the star-couplings of the reaction chamber set 104. When the sample introduction flow is 3ml/min, the retention time of each branch reaction medium flowing through each reaction chamber is 7.2min, and the temperature of the reaction medium flowing out is increased to 98.5 ℃ after the reaction medium at the room temperature of 25 ℃ continuously passes through the three-phase induction thermal reactor I through the test of a thermal infrared imager.
Example 2
The star-star type three-phase induction thermal reactor I, as shown in fig. 1, includes a three-column magnetic circuit 101, an excitation coil 102, a magnetic coupling tube set 103, and a reaction chamber set 104; wherein the magnetic coupling pipe group 103 is in star connection; the reaction chamber set 104 is also star-connected.
The excitation coil 102 is wound on each core limb of the three-column magnetic circuit 101, the number of turns of the excitation coil 102 on each core limb is 12, a mean voltage of 2000V is applied to the excitation coil 102 by adopting a three-phase power supply, the magnetic flux of each core limb in the three-column magnetic circuit 101 is 0.12Wb, at the moment, the magnetic conductive material of the three-column magnetic circuit 101 is cobalt-based amorphous, the initial relative magnetic permeability is 35000, the magnetic flux density in the working process is 0.8T, and the effective magnetic conductive sectional area of each core limb in the three-column magnetic circuit 101 is 0.15m2(ii) a Three star-shaped connected magnetic coupling pipes form a magnetic coupling pipe group 103 and are wound on each iron core column of the three-column magnetic circuit 101, and the number of turns of each magnetic coupling pipe is 48; the three reaction chambers form a reaction chamber group 104 based on star connection, the magnetic coupling tube group 103 and the reaction chamber group 104 are used as supports of continuously flowing reaction media, and further, the magnetic coupling tube group 103 and the reaction chamber group 104 are in a star-star connection form based on a three-phase circuit structure, as shown in fig. 2; each reaction chamber has a cross-sectional area of 0.16cm2Each magnetic coupling pipe has a cross-sectional area of 2.3cm2When a reaction medium (25 ℃, 0.6% NaOH, and 0.2% KCl) having an electric conductivity of 3.47S/m was pumped and flowed through the reaction chamber group 104, the effective potential difference across each reaction chamber was 13736V, the length of each reaction chamber of the reaction chamber 104 was 10cm, the impedance when the reaction medium filled each reaction chamber was 1600. omega., the induced current was 8.58A, and the induced current density was 53.65A/cm2(ii) a The sample inlet 201 for the reaction medium is located at the junction of the star-couplings of the magnetic coupling tube set 103, and the sample outlet 202 for the reaction medium is located at the junction of the star-couplings of the reaction chamber set 104. When the sample introduction flow is 2.4ml/min, the retention time of each branch reaction medium flowing through each reaction chamber is 2min, and the temperature of the reaction medium flowing out is increased to 96.8 ℃ after the reaction medium at the room temperature of 25 ℃ continuously passes through the three-phase induction thermal reactor I through the test of a thermal infrared imager.
The star-star type three-phase induction thermal reactor provided by the invention is designed based on the operation rule of a power system, and adopts three-phase three-column ironThe core magnetic circuit serves as an alternating magnetic field path. Wherein, the three magnetic coupling pipes and the three reaction chambers are respectively in star connection of a three-phase circuit, so that the conductive materials or reaction media in the reaction chambers generate higher effective potential difference, the effective potential difference is derived from the line voltage of the three-phase circuit, and the value of the effective potential difference is the value of the normal phase voltage
And the temperature rise efficiency of the feed liquid or the reaction medium is higher. Therefore, the star-star type three-phase induction thermal reactor can avoid the bad problems in the traditional ohmic heating when being used for processing samples, simultaneously, the samples can be efficiently heated under the action of no external heat source or radiation and no external electrode, and the star-star type three-phase induction thermal reactor has a single sample inlet and a single sample outlet, the liquid holding capacity of a reaction chamber is large, and the treatment capacity is higher under the same sample introduction flow.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention. Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. Star-star type three-phase induction thermal reactor, characterized in that it comprises: three-column magnetic circuit, excitation coil, magnetic coupling tube, reaction chamber;
the sample inlet and the sample outlet are respectively arranged at the connection intersection port of the magnetic coupling pipe group and the connection intersection port of the reaction chamber group, so that the retention time of continuous flow materials or reaction media of each branch in the reaction chamber is ensured to be equal;
the three-column magnetic circuit is made of a magnetic conductive material, and the excitation coil is wound on the three-column magnetic circuit;
the three magnetic coupling pipes are in a group and are connected in a star shape, and each group of magnetic coupling pipes is respectively wound on three iron core columns of the three-column magnetic circuit;
the three reaction chambers are in a group and are connected in a star shape;
the star-star type three-phase induction thermal reactor comprises at least one group of magnetic coupling pipes and at least one group of reaction chambers; the magnetic coupling tube group is connected with the reaction chamber group.
2. The star-star three-phase induction thermal reactor as claimed in claim 1, wherein after the power supply applies three-phase voltage to the exciting coil, the total magnetic flux carried by each core leg in the three-leg magnetic circuit is in the range of 0-10Wb, and the initial permeability of the material of the three-leg magnetic circuit is 800-90000.
3. Star-star shaped three-phase induction thermal reactor according to claim 1, characterized in that the inner diameter of the reaction chamber is smaller than the inner diameter of the magnetic coupling.
4. The star-star three-phase induction thermal reactor according to claim 1, wherein the ratio of the cross-sectional area of the reaction chamber to the cross-sectional area of the magnetic coupling tube is 1:1.3 to 1: 50.
5. The star-star three-phase induction thermal reactor according to claim 1, wherein the sample inlet is located at a junction of the set of magnetic coupling tubes; the sample outlet is positioned at the connection intersection of the reaction chamber group.
6. Star-star shaped three-phase induction thermal reactor according to claim 1, characterized in that the induced current density in the reaction chamber is 1-120A/cm2。
7. Star-star type three-phase induction thermal reactor according to claim 1, characterized in that the induction current loop is present only between the magnetic coupling and the reaction chamber, the sample inlet and the sample outlet being leak-free for open continuous flow processing.
8. A heating apparatus, characterized in that it employs a star-star type three-phase induction thermal reactor as claimed in any one of claims 1 to 7, and that it heats a substance having an electrical conductivity in the range of 0.1 to 40S/m.
9. The heating device of claim 8, wherein the substance is a flowable substance.
10. Use of the star-star type three-phase induction thermal reactor according to any of claims 1-7 and/or of the heating device according to any of claims 8-9 in the chemical, food and environmental fields.
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2018
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