CN210688921U - Device for drying lignite by combining microwave and hot air - Google Patents
Device for drying lignite by combining microwave and hot air Download PDFInfo
- Publication number
- CN210688921U CN210688921U CN201921085336.7U CN201921085336U CN210688921U CN 210688921 U CN210688921 U CN 210688921U CN 201921085336 U CN201921085336 U CN 201921085336U CN 210688921 U CN210688921 U CN 210688921U
- Authority
- CN
- China
- Prior art keywords
- microwave
- hot air
- drying
- generating device
- lignite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The utility model discloses a device of hot-blast dry brown coal of combining of microwave belongs to brown coal drying equipment technical field, the device includes feed arrangement, vibration drive mechanism, hot-blast generating device, microwave generating device, dry cavity, temperature measurement system and tail gas processing apparatus. The feeding device comprises a feeding hopper and a spiral feeder, the hot air generating device comprises an air blower and a hot air furnace, more than 1 microwave generating device and more than 1 air outlet are arranged above the drying cavity, a heat preservation layer and a metal shell capable of shielding microwaves are arranged in the cavity, the vibration transmission mechanism is connected with a vibration motor outside the cavity, and the tail end of the vibration transmission mechanism is provided with a baffle capable of being pulled and a discharge port.
Description
Technical Field
The utility model belongs to brown coal drying field, in particular to device of microwave hot-blast dry brown coal jointly.
Background
Lignite belongs to low-quality coal, has strong water absorption and high self-moisture (20-50%) due to developed pores and surfaces. The smoke generated by combustion is large, the heat value is low, the smoke is easy to weather and self-ignite, the smoke is inconvenient to store and transport, the effective conversion and utilization of the smoke are limited to a great extent, and the economic benefit and the competitiveness of the smoke are severely limited. In order to cleanly and efficiently utilize the lignite resources and reduce the utilization cost, the dehydration, upgrading and modification of the lignite before combustion are an essential step.
At present, the conventional lignite drying method at home and abroad is mainly a fluidized bed or rotary drying method and generally has the following defects that ① only can remove external moisture of lignite, the internal water and capillary water are not easy to dry, the moisture is easy to absorb again in a dried finished product, ② is easy to cause an accident of igniting pulverized coal, and the danger of burning and even explosion exists, ③ drying equipment has a complex structure, large energy consumption, large occupied area and high equipment manufacturing cost, ④ brown coal powder and blocks have uneven water content and uneven drying, the microwave drying speed is high, the selectivity is good, the penetrability is strong, and the drying method can be used immediately after stopping and is an environment-friendly lignite drying method.
The patent No. CN102564095 discloses a device and a method for drying lignite by low-pressure superheated steam, which adopts a mode that steam moves from bottom to top and lignite moves from top to bottom to dry the lignite, and has the defects of complex process, strict process conditions, low daily treatment capacity and uneven drying. Patent No. CN102207350B discloses a method for drying lignite by microwave fluidization, which comprises pre-drying raw material lignite by a microwave device through which hot air is introduced, and performing fluidized drying by a fluidized bed device through which hot air is introduced, so as to realize a drying process of lignite. However, the method disclosed by the patent has the advantages of complex flow, large floor area of equipment, high energy consumption and high industrial cost due to the implantation of two hot air flows.
In order to achieve the expected purposes of energy conservation, environmental protection, consumption reduction and effective quality improvement. Therefore, the development of the lignite drying technology which is simple in process method, safe, low in energy consumption, high in dehydration rate and free of repeated water absorption is of great practical significance for industrial application of lignite.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device of hot-blast dry brown coal of microwave combines drying technique and shale shaker to combine, reduces the environmental pollution problem in the operation process, improves the drying rate and the moisture clearance of brown coal, but continuous processing brown coal increases daily throughput, realizes the scale and uses.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for drying lignite by combining microwave and hot air is characterized by comprising: feed arrangement, vibration drive mechanism (13), hot-blast generating device, microwave generating device (7), dry cavity (11), temperature measurement system and tail gas processing apparatus (10), feed arrangement includes feeder hopper (4) and spiral feeder (5), hot-blast generating device includes air-blower (1) and hot-blast furnace (2), the top of dry cavity (11) is equipped with microwave generating device (7) more than 1 and gas vent (6) more than 1, is equipped with the metal casing that heat preservation and shielding microwave in the cavity, vibration drive mechanism (13) are connected with outside vibrating motor (12) of cavity, and its end is equipped with baffle (18) and discharge gate (19) that can twitch, and the brown coal after the final drying is collected in finished product coal bunker (20).
The microwave generating device (7) further comprises an alternating current power supply (21), a magnetron (22), a microwave waveguide (23) and an antenna (24), and the frequency and the power of the microwave generating device (7) can be adjusted.
Vibration drive mechanism (13) further include driving motor (25), initiative driving roller (26), shale shaker face (27), conveyer belt (28), bottom plate (29), support (30) and driven driving roller (31), vibration drive mechanism (13) have certain angle of inclination, and its lower extreme is equipped with damping spring (15) and supporting seat (16), shale shaker face (27) are wear-resisting screening face.
The temperature measurement system further comprises an infrared temperature measurement probe (8) and a digital display thermometer (9), and the measuring range is-30-650 ℃.
The flow direction of hot air in the drying cavity (11) is opposite to the conveying direction of the raw material lignite.
The temperature of hot air provided by the hot air generating device is 80-220 ℃, and the oxygen content is below 20%.
An air filter is arranged in the tail gas treatment device (10), tail gas subjected to gas-solid separation and dehydration treatment by the conventional technology is recycled back to the hot air generating device through the air distributing valve (3), and waste heat is recovered to recover solids into the finished coal bunker (20).
The utility model has the advantages that:
1) the utility model provides a device of hot-blast dry brown coal of combining of microwave, device simple structure, investment cost is low, and area is little, and operating efficiency is high, can realize continuous production.
2) The utility model discloses in the device, utilize microwave energy to carry out the selectivity heating to the moisture in the brown coal, solved the problem that traditional drying technique can not deep drying, be favorable to keeping the integrality of brown coal matrix, the direction of mass transfer heat transfer is unanimous among the microwave drying process, by brown coal matrix inside to the surface, combines hot air drying, and drying rate accelerates greatly.
3) The utility model discloses the device adopts the vibration drive mechanism device that has certain angle of inclination, has solved the problem of material easy putty in data send process for the material has increased gas-solid area of contact in whole drying process, and the hot-blast motion direction reciprocal with the material, abundant heat transfer, drying effect is more even.
4) The hot air carries the water vapor to flow in the cavity, so that the potential safety hazard of ignition and combustion easily occurring in the process of drying the lignite by microwave is avoided.
5) When the microwave and hot air are jointly dried, trace coal tar precipitated from the lignite is condensed on the surface of the lignite to block capillary pores, so that the hydrophilicity of the lignite is reduced, and the effect of drying and upgrading the lignite is achieved.
6) Low drying temperature, high energy utilization rate, low energy consumption, high safety and little environmental pollution.
Drawings
FIG. 1 is a schematic structural view of a device for drying lignite by microwave and hot air in combination;
FIG. 2 is a schematic view of a microwave generator;
FIG. 3 is a schematic view of a vibration transmission mechanism;
wherein: the device comprises a blower 1, a hot blast stove 2, a gas distributing valve 3, a feed hopper 4, a spiral feeder 5, an exhaust port 6, a microwave generating device 7, an infrared temperature measuring probe 8, a digital display thermometer 9, a tail gas processing device 10, a drying cavity 11, a vibrating motor 12, a vibrating transmission mechanism 13, a heat insulating layer 14, a damping spring 15, a supporting seat 16, a metal shell 17, a baffle 18, a discharge port 19, a finished coal bunker 20, an alternating current power supply 21, a magnetron 22, a microwave waveguide tube 23, an antenna 24, a transmission motor 25, a driving transmission roller 26, a vibrating screen surface 27, a conveyor belt 28, a bottom plate 29, a support 30 and a driven transmission roller 31.
Detailed Description
The following description of the preferred embodiments of the present invention will be made in further detail with reference to the accompanying drawings.
As shown in fig. 1, an apparatus for drying lignite by microwave and hot air combination comprises: the device comprises a feeding device, a vibration transmission mechanism (13), a hot air generating device, a microwave generating device (7), a drying cavity (11), a temperature measuring system and a tail gas treatment device (10), wherein the feeding device comprises a feeding hopper (4) and a spiral feeder (5), the hot air generating device comprises an air blower (1) and a hot air furnace (2), the drying cavity (11) is provided with more than 1 microwave generating device (7) and more than 1 exhaust port (6), a heat insulation layer and a metal shell capable of shielding microwaves are arranged in the cavity, the vibration transmission mechanism (13) is connected with a vibration motor (12) outside the cavity, the tail end of the vibration transmission mechanism is provided with a drawable baffle plate (18) and a discharge port (19), finally dried lignite is collected into a finished coal bunker (20), and a dotted arrow indicates the moving direction of gas, the solid arrows indicate the direction of movement of the material.
As shown in fig. 2, the microwave generating device (7) of this embodiment further includes an ac power supply (21), a magnetron (22), a microwave waveguide (23), and an antenna (24), and the frequency and power of the microwave generating device (7) of this embodiment can be adjusted.
As shown in fig. 3, the vibration transmission mechanism (13) of the present embodiment further includes a transmission motor (25), a driving transmission roller (26), a vibration sieve surface (27), a transmission belt (28), a bottom plate (29), a bracket (30) and a driven transmission roller (31), the vibration transmission mechanism (13) has a certain inclination angle, a damping spring (15) and a support seat (16) are disposed at the lower end of the vibration transmission mechanism, and the vibration sieve surface (27) is a wear-resistant sieve surface.
The temperature measurement system further comprises an infrared temperature measurement probe (8) and a digital display thermometer (9).
In this embodiment, the flow direction of the hot air in the drying cavity (11) is the reverse of the conveying direction of the raw material lignite.
An air filter is arranged in the tail gas treatment device (10) in the embodiment, tail gas subjected to gas-solid separation and dehydration treatment by the conventional technology is recycled back to the hot air generating device through the air distributing valve (3), and solids are recovered into the finished coal bunker (20).
The utility model discloses step when using: adding the materials into a spiral feeder through a feed hopper, and continuously supplying the materials into the microwave drying cavity under the stirring of a spiral blade; starting a hot air generating device and a microwave generating device, providing hot air and microwaves for a microwave drying cavity, and adjusting the temperature of the hot air generating device and the power and frequency of the microwave generating device; starting a temperature measuring device, and measuring the temperature of the microwave drying cavity in real time; vibrating and conveying through a vibration transmission mechanism, and drying the lignite supplied to the microwave drying cavity by microwave hot air; collecting the finished product obtained by drying to a finished product coal bunker through a movable baffle; steam is supplied to the tail gas treatment device through more than one exhaust port on the upper part of the microwave drying cavity, the treated steam is recycled to the hot air generation device, and the obtained solid is recycled to the finished coal bunker.
The above disclosure is only specific embodiments of the present invention, and obviously, the embodiments of the present invention are not limited thereto, and any person skilled in the art can be within the scope of the present invention as long as the various insubstantial improvements made by the method concept and technical solution of the present invention are adopted.
Claims (7)
1. A device for drying lignite by combining microwave and hot air is characterized by comprising: feed arrangement, vibration drive mechanism (13), hot-blast generating device, microwave generating device (7), dry cavity (11), temperature measurement system and tail gas processing apparatus (10), feed arrangement includes feeder hopper (4) and spiral feeder (5), hot-blast generating device includes air-blower (1) and hot-blast furnace (2), the top of dry cavity (11) is equipped with microwave generating device (7) more than 1 and gas vent (6) more than 1, is equipped with the metal casing that heat preservation and shielding microwave in the cavity, vibration drive mechanism (13) are connected with outside vibrating motor (12) of cavity, and its end is equipped with baffle (18) and discharge gate (19) that can twitch, and the brown coal after the final drying is collected in finished product coal bunker (20).
2. The device for drying lignite by combining microwave and hot air according to claim 1, wherein the microwave generating device (7) further comprises an alternating current power supply (21), a magnetron (22), a microwave waveguide (23) and an antenna (24), wherein the frequency and the power of the microwave generating device (7) can be adjusted, the power is 1-20 kW, and the frequency is 915 +/-50 MHz or 2450 MHz.
3. The device for microwave and hot air combined drying of lignite according to claim 1, wherein the vibration transmission mechanism (13) further comprises a transmission motor (25), a driving transmission roller (26), a vibration screen surface (27), a conveyor belt (28), a bottom plate (29), a bracket (30) and a driven transmission roller (31), the vibration transmission mechanism (13) has a certain inclination angle, a damping spring (15) and a supporting seat (16) are arranged at the lower end of the vibration transmission mechanism, and the vibration screen surface (27) is a wear-resistant screen surface.
4. The device for drying lignite by combining microwave and hot air according to claim 1, wherein the temperature measuring system further comprises an infrared temperature measuring probe (8) and a digital display temperature measuring instrument (9), and the measuring range is-30-650 ℃.
5. The device for drying lignite by combining microwave and hot air according to claim 1, wherein the flow direction of hot air in the drying chamber (11) is the reverse of the conveying direction of raw lignite.
6. The device for drying lignite by combining microwave and hot air according to claim 1, wherein the temperature of hot air supplied by the hot air generating device is 80-220 ℃ and the oxygen content is below 20%.
7. The device for drying lignite by microwave and hot air combined according to claim 1, wherein an air filter is arranged in the tail gas treatment device (10), tail gas subjected to gas-solid separation and dehydration treatment by a conventional technology is recycled back to the hot air generation device through the gas distribution valve (3), and waste heat is recovered to recover solids into a finished product coal bunker (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921085336.7U CN210688921U (en) | 2019-07-12 | 2019-07-12 | Device for drying lignite by combining microwave and hot air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921085336.7U CN210688921U (en) | 2019-07-12 | 2019-07-12 | Device for drying lignite by combining microwave and hot air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210688921U true CN210688921U (en) | 2020-06-05 |
Family
ID=70883402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921085336.7U Active CN210688921U (en) | 2019-07-12 | 2019-07-12 | Device for drying lignite by combining microwave and hot air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210688921U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411151A (en) * | 2019-07-12 | 2019-11-05 | 云南民族大学 | A kind of device and method of microwave hot air combined drying brown coal |
| CN111854335A (en) * | 2020-07-30 | 2020-10-30 | 李国安 | Floated powder drying-machine |
| CN112197509A (en) * | 2020-09-21 | 2021-01-08 | 高瑰丽 | Pneumatic tea leaf drying method |
| CN115235224A (en) * | 2022-07-27 | 2022-10-25 | 国能包头能源有限责任公司 | Coal slime dewatering and upgrading system |
-
2019
- 2019-07-12 CN CN201921085336.7U patent/CN210688921U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411151A (en) * | 2019-07-12 | 2019-11-05 | 云南民族大学 | A kind of device and method of microwave hot air combined drying brown coal |
| CN111854335A (en) * | 2020-07-30 | 2020-10-30 | 李国安 | Floated powder drying-machine |
| CN112197509A (en) * | 2020-09-21 | 2021-01-08 | 高瑰丽 | Pneumatic tea leaf drying method |
| CN115235224A (en) * | 2022-07-27 | 2022-10-25 | 国能包头能源有限责任公司 | Coal slime dewatering and upgrading system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210688921U (en) | Device for drying lignite by combining microwave and hot air | |
| CN110411151A (en) | A kind of device and method of microwave hot air combined drying brown coal | |
| CN102207350B (en) | Method for carrying out fluidized drying on lignite by microwaves | |
| CN102285650B (en) | Process for producing active carbon by using biomass for supplying heat and using fly ash | |
| CN104528717B (en) | Preparation method of briquetted active carbon | |
| CN102661666A (en) | Tail gas utilization method and tail gas utilization system of rotary lime kiln | |
| CN102102021A (en) | Lignite upgrading furnace | |
| CN102258923A (en) | Method for recycling and reusing tail gas of calcium carbide furnace | |
| CN109609190A (en) | A kind of refuse gasification and tar catalytic gasification device | |
| CN108485690B (en) | Device and method for extracting oil gas by pulverized coal low-temperature static pyrolysis | |
| CN104449773B (en) | Method and device for upgrading low-rank pulverized coal | |
| CN201558751U (en) | Drying and dry separation combination raw coal quality improvement device | |
| CN111423896B (en) | Gasification coke production device and method | |
| CN210399936U (en) | Clean sintering system based on fuel preparation and roasting control | |
| CN106635111A (en) | Novel system for co-producing liquid fuel and biochar by biomass pyrolysis | |
| CN201045558Y (en) | Mobile clapboard type fluid bed | |
| CN103468934A (en) | Powdery difficult-separation low-grade iron ore multistage fluidized magnetic roasting furnace and roasting method thereof | |
| CN104962300A (en) | Coal microwave dry distillation equipment and coal microwave dry distillation treatment method thereof | |
| CN102559978A (en) | Method for producing sponge iron by electric heating and system thereof | |
| CN202792077U (en) | Biomass feeding device integrating sieving and drying and conveying | |
| CN202547358U (en) | Tail gas utilization system for lime rotary kiln | |
| CN105062523B (en) | A kind of fine coal upgrading pyrolysis installation and upgrading pyrolytic process | |
| CN204848749U (en) | Dry distillation of coal microwave is equipped | |
| CN204039334U (en) | Coal gas circulation coal wholegrain radial sector pyrolysis coupling Active coke preparation system | |
| CN104315823B (en) | Semi coke dewatering device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |