CN202304310U - Tower-type six-drying-cavity microwave drying equipment for low-rank coal - Google Patents
Tower-type six-drying-cavity microwave drying equipment for low-rank coal Download PDFInfo
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- CN202304310U CN202304310U CN2011203873340U CN201120387334U CN202304310U CN 202304310 U CN202304310 U CN 202304310U CN 2011203873340 U CN2011203873340 U CN 2011203873340U CN 201120387334 U CN201120387334 U CN 201120387334U CN 202304310 U CN202304310 U CN 202304310U
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- microwave drying
- microwave
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- drying
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Abstract
The utility model relates to tower-type six-drying-cavity microwave drying equipment for low-rank coal, and belongs to the field of drying equipment. A technical key point is that the tower-type six-drying-cavity microwave drying equipment has a vertical tower-type structure; a hollow microwave drying cavity is formed in the middle of the equipment; a feed hopper is arranged on the top of the microwave drying cavity, and a microwave drying assembly system is arranged at the lower end of the microwave drying cavity and is formed by arranging six microwave drying units side by side in an annular shape, and each microwave drying unit has an integral microwave drying function; a buffering dust removal bin is arranged at the bottom of the microwave drying cavity; an output device is arranged below the buffering dust removal bin; a water vapor recovery pipeline is arranged on the outer side of the microwave drying cavity and is communicated with the inside of the microwave drying cavity; and upper and lower ends of the microwave drying cavity are provided with a feeding valve and a discharging valve. The tower-type six-drying-cavity microwave drying equipment has the advantages of low energy consumption, small floor space, simplicity of control and maintenance and low running cost, and can dry the low-rank coal completely.
Description
Technical field
The utility model belongs to drying device field, is specifically related to a kind of tower six drying chamber low-order coal microwave dryers.
Background technology
So-called low-order coal is meant low rotten, younger coal.Mainly comprise coals such as brown coal, dross coal, jet coal, weakly caking coal; Its main feature is moisture high (20%---60%); Calorific value low (1000---therefore 3500Kcal/kg), this utilization and transportation to low-order coal has brought difficulty, must carry out drying and upgrading to it before using.
Current domestic and international representational coal upgrading technology mainly contains following several big type:
1, hot-blast stove, hot flue gas direct drying method.
2, direct, the contact drying method of steam.
3, micro-wave drying method.
4, pyrolysis upgrading method.
Hot-blast stove, hot flue gas direct drying method and steam are direct, the contact drying method mainly is through different heat carriers the outer water in the coal to be put forward; The general thermal efficiency is in 85%; Dried moisture generally at 3-15%, do not carry out chemical reaction, the coal chemistry characteristic does not change.Pyrolysis (destructive distillation) upgrading is meant under secluding air (or at nonoxidizing atmosphere) condition heats coal, finally obtains the processing method of coal gas, tar and semicoke.It is the course of reaction that physics adds chemistry, comprises gas heat carrier method pyrolysis upgrading, solid heat carrier method pyrolysis pyrolysis (destructive distillation) upgrading and other special method for pyrolysis upgrading.Also has non-evaporation drying technology in addition, like technology such as heating power dehydration, mechanical hot extrusion dehydration, dehydration of organic solvent.
Though more than these drying processes played drying purpose preferably; But said prior art ubiquity disposal ability little, drying effect is poor, do be prone to the get damp suction, dry run easy firing of back low-order coal explodes; Problem such as seriously polluted is difficult to reach present environmental requirement both domestic and external, therefore demands urgently prior art is improved; With the drying capacity of raising equipment, and can satisfy the safe and reliable and environmental requirement in the production process.
The utility model content
The purpose of the utility model is prior art is improved, and provides that a kind of to have energy consumption low, and thoroughly dry, control is simple, and floor space is few, safeguard simple, the tower six drying chamber low-order coal microwave dryers that operating cost is low.
For realizing above-mentioned purpose, the utility model is realized in the following manner:
Be a kind of tower six drying chamber low-order coal microwave dryers; The present technique main points are that this equipment adopts vertical tower structure; The center is the microwave drying chamber of hollow; Top, microwave drying chamber is provided with feed hopper, and the lower end is provided with the microwave drying component system, and it is ring-like that said microwave drying component system surrounds breach ringwise by 6 microwave drying unit.Bottom, microwave drying chamber is provided with cushions the dirt storehouse that disappears; The below of cushioning the dirt storehouse that disappears is provided with output device; Arranged outside steam recovery channel in the microwave drying chamber, this steam recovery channel and microwave drying chamber internal run-through, the upper/lower terminal in microwave drying chamber is provided with pan feeding valve and discharge gate respectively.
Between said microwave drying chamber and the steam recovery channel split with it is set, and evenly is covered with the active clapboard of aperture.
In addition, reduce impact to transport in order to make when the low-order coal of drying falls, the operation stability of support equipment, buffering disappears and is 30～120 angles between dirt storehouse and the microwave drying chamber.
The utility model tool combines freely falling body principle and microwave technology and be incorporated in the low-order coal drying process after adopting said structure, utilizes the principle of heating using microwave to remove the moisture in the low-order coal; Other impurity such as sulphur, phosphorus, and utilize the main mode of movement of freely falling body principle as the coal dry run, thus save the conveying equipment of dry run; The construction cost of minimizing equipment and operating cost, it is low to have energy consumption, thoroughly dry; Control is simple; Floor space is few, safeguards simply the advantage that operating cost is low.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model
Accompanying drawing 2 is microwave drying component system sectional views
The outlet of 1 steam recovery channel; 2 feed hopper; 3 pan feeding valves; 4 steam recovery channels; 5 dividing plates; 6 microwave drying chambeies; 7 microwave drying component systems; 8 discharge gates; 9, cushion the dirt storehouse that disappears; 10 transports; 11 movable chamber doors; 12 microwave drying unit.
Specific embodiments
Like Fig. 1, shown in Figure 2; The technical essential of these tower six drying chamber low-order coal microwave dryers is that this equipment adopts vertical tower structure; The center is the microwave drying chamber 6 of hollow, and 6 tops, microwave drying chamber are provided with feed hopper 2, and the lower end is provided with microwave drying component system 7; It is ring-like that this microwave drying component system 7 surrounds breach as shown in Figure 2 ringwise by 6 microwave drying unit 12; 6 bottoms, microwave drying chamber are provided with cushions the dirt storehouse 9 that disappears, and the below of cushioning the dirt storehouse 9 that disappears is provided with output device 10, the arranged outside steam recovery channel 4 in microwave drying chamber 6; This steam recovery channel 4 and microwave drying chamber 6 internal run-throughs, the upper/lower terminal in microwave drying chamber 6 is provided with pan feeding valve 3 and discharge gate 8 respectively.
Between said microwave drying chamber 6 and the steam recovery channel 4 split with it is set, and evenly is covered with the active clapboard 5 of aperture.
In addition, reduce impact to transport in order to make when the low-order coal of drying falls, the operation stability of support equipment, buffering disappears and is 30～120 angles between dirt storehouse 9 and the microwave drying chamber 6.
The operation principle of this equipment is:
Microwave be frequency at the electric wave of 300 megahertzes to 300 gigahertzs, that we add heat utilization is 2450MHz and 915MHz.Dielectric material is made up of polar molecule and nonpolar molecule, and under electromagnetic field effect, these polar molecules are from the polarity oriented of original random distribution state shift according to electric field.And under the high-frequency electromagnetic field action, these orientations constantly change by frequencies of alternating electromagnetism, thereby this process causes the motion of molecule and mutual friction generation heat mutually.This moment, the field energy of alternating electric field was converted into the heat energy in the medium, and medium temperature is constantly raise.Hydrone in the coal is a polar molecule.It is under the effect of fast-changing high frequency points magnetic field, and its polarity orientation will change along with the variation of external electric field.Cause the effect of the mutual fricting movement of hydrone, the field energy of microwave field is converted into the heat energy of hydrone at this moment, makes its volatilization of being heated, thereby reaches the purpose of heat drying.
Present technique is compared with routine techniques; Because of routine heating (like flame, hot blast, electric heating, steam etc.) all is to utilize hot conduction, convection current, heat radiation that heat is at first passed to the surface of heating object, progressively make central temperature raise (i.e. the external heat of normal title) through the heat conduction again.It will make the centre reach required temperature, needs certain heat conduction time, and just longer to the required time of the object of pyroconductivity difference; Heating using microwave then belongs to inner mode of heating; Electromagnetic energy directly acts on medium molecule and converts heat to, and transmission performance is heated the material inside and outside medium simultaneously, does not need the heat conduction; And the inner radiating condition that lacks; Cause internal temperature to be higher than outside temperature gradient distribution, form and drive the steam pressure difference of internal moisture, quickened the migration evaporation rate of moisture content to surface seepage.Particularly to water content at the coal below 30%, the shortening that speed can hundreds of times reaches even drying at short notice.
The main distinction of microwave drying and other drying means is: microwave drying can be removed Free water can not damaged coal with the inner contained water of coal intrinsic property, and the process control parameters of microwave drying simultaneously is simple, is easier to carry out accurate humidity and controls.On the whole, utilizing micro-wave drying method to brown coal the possess skills characteristics of advanced person, highly-efficient treatment of upgrading of dewatering, is client's optimal selection.
The microwave drying security is better, and baking temperature can be controlled in below 90 ℃, and burning or explosion accident can not take place; Drying efficiency high (microwave energy is high to the efficiency of heating surface of water) can both be evenly dry in granularity 0～50mm scope, technology maturation; Technology controlling and process is simple, can realize automated production, production capacity flexible design (20 tons/hour of wall scroll production lines); Product can reduce sulphur, phosphorus equal size, and the water that drying goes out is recyclable, and is comparatively favourable to the water-deficient area.
The utility model closes microwave drying chamber discharge gate 8 through control device when work, and microwave drying chamber pan feeding valve 3 is opened; The coal of deposit falls under gravity in the microwave drying chamber 6 in the feed hopper 2, and pan feeding valve 3 is closed behind the 6 full coals of microwave drying chamber, and microwave drying component system 7 is started working; In microwave drying chamber 6, form microwave electromagnetic field; Moisture in the coal rapid heated volatile under the effect of microwave electromagnetic field forms steam, and the steam and the high temperature that in microwave drying chamber 6, form have increased the air pressure in microwave drying chamber 6, forms the height draught head through the air pressure in hole on the dividing plate 5 and the steam recovery channel 4; Under differential pressure action; Steam in the microwave drying chamber 6 gets into back discharge in the steam recovery channel 4, and after the coal drying was accomplished, microwave drying component system 7 quit work; Microwave drying chamber discharge gate 8 is opened, and dried coal is fallen to cushion in the dirt storehouse 9 that disappears and behind the dirt that disappears, is admitted to next procedure through transport 10.A part of steam in the steam recovery channel 4 can be condensed into aqueous water and fall the bottom discharge of steam recovery channel 4, and the gas in the steam recovery channel 4 is discharged through steam recovery channel outlet 1, in managing, forms negative pressure simultaneously.
The utility model is because complete equipment comprises the microwave drying subsystem of some groups of independences and telotism; Through programme-control; Make these microwave drying subsystem peaces work successively according to a definite sequence; Can avoid all microwave drying component systems to start simultaneously like this producing excessive dash current equipment is caused damage, also reduce coal breakage simultaneously to the buffering impact in dirt storehouse that disappears, and can make the more continuous and level and smooth operation of entire equipment.Because the microwave drying subsystem is the system with independence and telotism; So when one group of microwave drying subsystem breaks down maybe need safeguard the time; Its pan feeding valve 3 will be closed, and stop these microwave drying chamber 6 chargings, and other microwave drying subsystem then can not be affected and still work on; So just can under non-stop-machine situation, carry out the diagnosis and repair maintenance, thereby can significantly improve the utilization of capacity of equipment equipment.
Native system is owing to adopted movable chamber door 11 and can change dividing plate 5 designs; Therefore can easily open movable chamber door 11 clears up; Thereby significantly increase work efficiency, coal evaporates the moisture that in the microwave drying chamber can get into the steam recovery channel through the aperture on the dividing plate; The size of aperture through tight calculating, also has shielding action to microwave according to microwave wavelength, and microwave can not revealed through aperture, has ensured operating personnel's safety yet.
The utility model tool combines freely falling body principle and microwave technology and be incorporated in the low-order coal drying process after adopting said structure, utilizes the principle of heating using microwave to remove the moisture in the low-order coal; Other impurity such as sulphur, phosphorus, and utilize the main mode of movement of freely falling body principle as the coal dry run, thus save the conveying equipment of dry run; The construction cost of minimizing equipment and operating cost, it is low to have energy consumption, thoroughly dry; Control is simple; Floor space is few, safeguards simply the advantage that operating cost is low.
Claims (3)
1. tower six drying chamber low-order coal microwave dryers; This equipment of being characterised in that adopts vertical tower structure, and the center is the microwave drying chamber of hollow, and top, microwave drying chamber is provided with feed hopper; The lower end is provided with the microwave drying component system; This microwave drying system surrounds ring-like the composition side by side by 6 microwave drying unit, and each microwave drying unit includes complete microwave drying function, and bottom, microwave drying chamber is provided with cushions the dirt storehouse that disappears; The below of cushioning the dirt storehouse that disappears is provided with output device; Arranged outside steam recovery channel in the microwave drying chamber, this steam recovery channel and microwave drying chamber internal run-through, the upper/lower terminal in microwave drying chamber is provided with pan feeding valve and discharge gate respectively.
2. tower six drying chamber low-order coal microwave dryers according to claim 1 is characterized in that between microwave drying chamber and the steam recovery channel split with it being set, and evenly are covered with the active clapboard of aperture.
3. tower six drying chamber low-order coal microwave dryers according to claim 1 is characterized in that buffering disappears and is 30～120 angles between dirt storehouse and the microwave drying chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203873340U CN202304310U (en) | 2011-10-12 | 2011-10-12 | Tower-type six-drying-cavity microwave drying equipment for low-rank coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203873340U CN202304310U (en) | 2011-10-12 | 2011-10-12 | Tower-type six-drying-cavity microwave drying equipment for low-rank coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202304310U true CN202304310U (en) | 2012-07-04 |
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ID=46373194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203873340U Expired - Fee Related CN202304310U (en) | 2011-10-12 | 2011-10-12 | Tower-type six-drying-cavity microwave drying equipment for low-rank coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202304310U (en) |
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2011
- 2011-10-12 CN CN2011203873340U patent/CN202304310U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 255086 Shandong province Zibo City Yumin Road hi tech Development Zone No. 169 Patentee after: Shandong Borun Process Industrial Technology Corp., Ltd. Address before: 255086 Shandong province Zibo City Yumin Road hi tech Development Zone No. 169 Patentee before: Shandong Borun Process Industrial Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20161012 |