CN210718611U - Electric heating rotary kiln - Google Patents
Electric heating rotary kiln Download PDFInfo
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- CN210718611U CN210718611U CN201921659929.XU CN201921659929U CN210718611U CN 210718611 U CN210718611 U CN 210718611U CN 201921659929 U CN201921659929 U CN 201921659929U CN 210718611 U CN210718611 U CN 210718611U
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- power supply
- heating power
- electrodes
- rotary
- rotary kiln
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- 238000005485 electric heating Methods 0.000 title abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
An electric heating rotary kiln comprises a heating power supply, an electrode system and a rotary pipe. The electrode system comprises at least two or two groups of electrodes, wherein one or one group of electrodes is an anode, the other one or one group of electrodes is a cathode, the electrode system rotates along with the rotary pipe, a heating power supply applies alternating current or direct current voltage on the anode and the cathode, the electrodes are in electrical contact with the heated material in the rotary kiln, the material is a heating body, one or more transformers are arranged between the heating power supply and the anode and the cathode, and the primary sides of the transformers are in conductive connection with the heating power supply and do not rotate along with the rotary pipe; the secondary side of the transformer is conductively connected to the positive and negative poles and rotates with the rotary tube, making the transformer a form of brush and conducting ring. Its advantages are less abrasion between electric brush and conducting ring, and less wire loss caused by high current.
Description
Technical Field
The invention relates to an electric heating rotary kiln, and belongs to the technical field of kiln equipment.
Background
The rotary kiln is important heating and calcining equipment in chemical industry, material industry and even medicine industry, and is very widely applied. Chinese patent CN103335513A discloses an electrically heated rotary kiln, in which a power source is directly fed into a heated material (i.e. a material to be processed by the rotary kiln, hereinafter referred to as a material) in the rotary kiln through an electrode, the material is directly heated by the resistance of the material (hereinafter referred to as an electrically heated rotary kiln), the material in a furnace chamber (where the material in the rotary tube can reach) generally rotates and/or rolls along with the rotation of the rotary tube, and the rotary tube of the rotary kiln generally has an inclination angle with the horizontal plane, so that the material which is not fixed on the inner wall of the furnace chamber also advances along the axial direction of the rotary tube in the rotation process, i.e. the material in the rotary kiln advances spirally. The rotary kiln hearth is generally divided into a heating section (or preheating section), a heating section (or high-temperature section) and a cooling section (or cooling section) along the axial direction of the rotary pipe, and materials sequentially pass through the preheating section, the heating section and the cooling section and then are discharged from the kiln. The voltage applied between the electrodes inside the rotating tube can be either an alternating current or a direct current. When the direct current is adopted, one or one group of electrodes is the anode, and the other one or one group of electrodes is the cathode; in the case of alternating current, the positive and negative electrodes are not used, but for the sake of convenience of description, the positive and negative electrodes are used as the reference in the present invention.
Because the electrode system rotates along with the rotary pipe, and the power grid system supplying power to the rotary kiln does not rotate along with the rotary pipe, an electric brush and a conducting ring are arranged between the heating power supply and the electrode system, the electric brush is in conductive contact with the conducting ring, one of the electric brush and the conducting ring rotates along with the rotary pipe, and the other electric brush does not rotate along with the rotary pipe (for convenience of description, the conducting ring is fixed to rotate along with the rotary pipe and is in conductive connection with the electrode system, and the electric brush is in conductive connection with the heating power supply).
The electric heating rotary kiln needs low voltage and large current when being used for heating materials with small resistance or other heating objects. If such a low voltage and a large current are directly led out from the heating power supply, a large current flows between the heating power supply and the brush, resulting in a relatively large line loss. At this time, the brush and the conducting ring are replaced by one or a group of transformers, and only the electrode system rotating along with the rotary tube and the secondary side of the transformer have large current, so that the line loss can be greatly reduced. And the friction and abrasion between the high-current electric brush and the conducting ring are avoided.
Disclosure of Invention
In order to avoid wearing and tearing between the brush of electrical heating rotary kiln and the conducting ring to reduce the line loss when using heavy current heating, the utility model provides an electrical heating rotary kiln brush and its conducting ring system of improved design.
The purpose of the invention is realized as follows: because the secondary side and the primary side of the transformer may not be physically connected, the conducting ring and the brush system of the electrically heated rotary kiln are replaced by the secondary side and the primary side of the transformer.
The specific technical scheme of the invention is as follows.
An electric heating rotary kiln comprises a heating power supply, an electrode system and a rotary pipe, and is characterized in that the electrode system comprises at least two or two groups of electrodes, wherein one or one group of electrodes is a positive electrode, the other one or one group of electrodes is a negative electrode, and the electrode system rotates along with the rotary pipe; the heating power supply applies alternating current or direct current voltage to the anode and the cathode, and the heating power supply is electrically contacted with the heated material in the rotary kiln through the electrodes, and the material is a heating body; one or more transformers are arranged between the heating power supply and the anode and the cathode, and the primary side of each transformer is electrically connected with the heating power supply and does not rotate along with the rotary pipe; the secondary side of the transformer is conductively connected to the positive and negative poles and rotates with the rotary tube, making the transformer a form of brush and conducting ring.
Further, the heating power supply comprises a plurality of transformers, secondary side outputs of the transformers are connected in parallel and then are in conductive connection with the positive electrode and the negative electrode, so that larger current and power can be fed between the positive electrode and the negative electrode.
Compared with the prior art, the utility model discloses following advantage has:
1) frictional wear between the brushes and the conductive ring is avoided.
2) When large current is needed between the positive electrode and the negative electrode of the rotary kiln, the voltage can be reduced at the transformer, the large current is prevented from being introduced into a lead between a heating power supply and the electric brush, and the line loss is reduced.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic view of an electrically heated rotary kiln according to example 1.
FIG. 2 is a schematic view of an electrically heated rotary kiln according to example 2.
Detailed Description
Example 1
Fig. 1 is a schematic diagram of embodiment 1. The electric heating rotary kiln is used for drying or heating materials and comprises a rotary pipe 1, refractory materials 2, a rotary kiln hearth 3, preheating section materials 4, heating section materials 5 and cooling section materials 6. The electrode system comprises a cathode consisting of 7, 8 and 9 and an anode consisting of 1, 11 and 12; 8, 10 are annular conductive materials embedded in the refractory 2, such as graphite materials, which are higher than the inner wall of the refractory 2 so as to be in better contact with the materials; 7 and 11 are conductive materials, and current is respectively introduced to 8 and 10 from the outside of the rotary pipe.
13. 14, 15, 16 are different parts of the same C-shaped conductive ring, and for convenience of illustration, the part between 15 and 16 is hidden. At 13 and 14 are the mouths of the C-shaped conductive rings. The C-shaped conducting ring is the secondary winding of a transformer having a primary winding 19 and a magnetic core 18. And 20 is a heating power supply. 9 and 12 are conductive materials and are conductively connected to 14 and 7 and 13 and 11, respectively.
The C-ring rotates with the rotary pipe 1 and generally needs to be fixed to the rotary pipe 1, where the C-ring is fixed to the rotary pipe 1 by an insulator 17. Therefore, the transformer core 18 is also open and allows the insulator 17 to pass through.
When the rotary kiln rotates, the C-shaped conductive ring penetrates through the magnetic core 18 most of the time, and only when magnetism passes between the C openings 13 and 14, the C-shaped conductive ring does not exist in the inner cavity of the magnetic core 18 for a short time, and at the moment, no current voltage output can be carried out on the secondary side for a short time.
The secondary side of the transformer may also be in the form of a spiral coil, the two ends of the coil still being 13 and 14. The output voltage between 13 and 14 can then be increased.
The heated material or other resistance elements are conductively connected 8 and 10, so that a current loop is formed, and the heating purpose of the rotary kiln is achieved.
Example 2
Fig. 2 is a schematic diagram of embodiment 2. In this embodiment, the secondary winding 21 is coaxially mounted to the rotation axis of the rotary pipe on the basis of embodiment 1, so that the secondary winding 21 can easily rotate with the rotary pipe. The primary winding 19 and the core 18 are mounted around 21 as are conventional asynchronous ac motor windings and cores.
The output of the secondary 21 can be rectified to form a direct current and then fed into the electrode system.
Claims (2)
1. The utility model provides an electrical heating rotary kiln, its includes heating power supply, electrode system, gyration pipe, its characterized in that: the electrode system comprises at least two or two groups of electrodes, wherein one or one group of electrodes is a positive electrode, the other one or one group of electrodes is a negative electrode, and the electrode system rotates along with the rotary pipe; the heating power supply applies alternating current or direct current voltage to the anode and the cathode, and the heating power supply is electrically contacted with the heated material in the rotary kiln through the electrodes, and the material is a heating body; one or more transformers are arranged between the heating power supply and the anode and the cathode, and the primary side of each transformer is electrically connected with the heating power supply and does not rotate along with the rotary pipe; the secondary side of the transformer is conductively connected to the positive and negative poles and rotates with the rotary tube, making the transformer a form of brush and conducting ring.
2. An electrically heated rotary kiln as defined in claim 1, wherein: the heating power supply comprises a plurality of transformers, secondary side outputs of the transformers are connected in parallel and then are connected to the positive electrode and the negative electrode in an electric conduction mode, and larger current and power are fed between the positive electrode and the negative electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921659929.XU CN210718611U (en) | 2019-10-02 | 2019-10-02 | Electric heating rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921659929.XU CN210718611U (en) | 2019-10-02 | 2019-10-02 | Electric heating rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210718611U true CN210718611U (en) | 2020-06-09 |
Family
ID=70937435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921659929.XU Active CN210718611U (en) | 2019-10-02 | 2019-10-02 | Electric heating rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210718611U (en) |
-
2019
- 2019-10-02 CN CN201921659929.XU patent/CN210718611U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240511 Address after: No. 104, 1st Floor, Building 2, No. 1999 Tianfu Fourth Street, Chengdu High tech Zone, Chengdu Free Trade Zone, Sichuan Province, 610000 Patentee after: China Hydrogen Metallurgical Control (Chengdu) Technology Co.,Ltd. Country or region after: China Address before: 610041 Chengdu Institute of organic chemistry, Chinese Academy of Sciences, No. two, 16 south section of the first ring road, Chengdu, Sichuan Patentee before: Feng Liangrong Country or region before: China |