CN104388143A - Two-stage continuous lignite upgrading system - Google Patents
Two-stage continuous lignite upgrading system Download PDFInfo
- Publication number
- CN104388143A CN104388143A CN201410648199.9A CN201410648199A CN104388143A CN 104388143 A CN104388143 A CN 104388143A CN 201410648199 A CN201410648199 A CN 201410648199A CN 104388143 A CN104388143 A CN 104388143A
- Authority
- CN
- China
- Prior art keywords
- upgrading
- fluidized bed
- microwave
- air
- brown coal
- 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.)
- Pending
Links
- 239000003077 lignite Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 10
- 238000001035 drying Methods 0.000 abstract description 43
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 description 12
- 238000005243 fluidization Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000003245 coal Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a two-stage continuous lignite upgrading system, comprising an air fluidized bed pre-drying system and a microwave-enhanced upgrading system, wherein lignite treated by the air fluidized bed pre-drying system is fed into the microwave-enhanced upgrading system through a conveying belt for microwave irradiation treatment; the air fluidized bed pre-drying system comprises an air fluidized bed; a circular air duct of the air fluidized bed is provided with a heater; the air fluidized bed pre-drying system further comprises an air compressor, a constant pressure air bag, a valve and a flowmeter, and the outlet of the flowmeter is connected with the circular air duct of the air fluidized bed through the heater; the microwave-enhanced upgrading system comprises a tunnel type microwave upgrading device, and energy suppressors are arranged at the inlet and the outlet of the box body of the tunnel type microwave upgrading device. The system can be used for drying and upgrading lignite by the combined action of first-section air fluidized bed pre-drying and second-section microwave-enhanced upgrading and has the advantages of low cost, low energy consumption, high lignite drying efficiency, continuous production and the like.
Description
Technical field
The present invention relates to a kind of brown coal upgrading system, particularly relate to a kind of two sections of continous way brown coal upgrading systems.
Background technology
Brown coal are the solid crude fuel of widespread use, are widely applied in industries such as heat supply, generating and chemical industry.But, due to its water and ash content high, cause net calorific value as received basis lower, and be exposed to easy catamorphism and spontaneous combustion in air for a long time and cause the loss of product coal, these unfavorable factor actings in conjunction reduce it and utilize space, improve it and utilize cost.Therefore, that explores that brown coal method for upgrading can expand brown coal utilizes space, reduces it and is utilizing the loss in process, improve its utilising efficiency, have higher economic worth to its application.
In recent years, define the method for some brown coal upgradings such as such as thermal treatment modification, hydrothermal modification (HTD), mechanical hot pressing modification (MTE) and dehydration hot pressing upgrading (HPU), but because energy consumption is comparatively large and easily temperature is too high, the coal-tar middle oil small molecules that waits of coal is separated out, reduce its calorific value, and pollute, spread is still difficult in industrial application.
Summary of the invention
The object of this invention is to provide a kind of less energy-consumption, high efficiency two sections of continous way brown coal upgrading systems.
The object of the invention is to be achieved through the following technical solutions:
Two sections of continous way brown coal upgrading systems of the present invention, comprise the predrying system of Air Fluidized bed and microwave reinforced upgrading system, the brown coal after the process of described Air Fluidized bed predrying system are sent in described microwave reinforced upgrading system by conveying belt and are carried out microwave exposure process;
The predrying system of described Air Fluidized bed comprises Air Fluidized bed, the circulation air path of described Air Fluidized bed is provided with well heater, also comprise the air compressor, level pressure bellows chamber, valve, the under meter that connect successively, the outlet of described under meter is connected by the circulation air path of described well heater with described Air Fluidized bed;
Described microwave reinforced upgrading system comprises tunnel type micro wave upgrading device, and the casing inlet and outlet of described tunnel type micro wave upgrading device arranges energy suppresser.
As seen from the above technical solution provided by the invention, two sections of continous way brown coal upgrading systems that the embodiment of the present invention provides, owing to adopting the drying and upgrading of combined action realization to brown coal of one section of predrying+two sections of microwave reinforced upgrading of Air Fluidized bed, realize two sections of connections with travelling belt simultaneously, thus reach quantity-produced object, have cost low, power consumption less, drying brown coal efficiency is high and produce the advantages such as continuous.
Accompanying drawing explanation
The structural representation of two sections of continous way brown coal upgrading systems that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is one section of predrying system diagram of Air Fluidized bed in the embodiment of the present invention;
Fig. 3 is two sections of microwave reinforced upgrading system figure in the embodiment of the present invention;
Fig. 4 is drying curve figure in the embodiment of the present invention.
In figure:
Air Fluidized bed 1, well heater 2, under meter 3, valve 4, level pressure bellows chamber 5, air compressor 6, tunnel type micro wave upgrading device 7, energy suppresser 8, steam outlet 9, waveguide energy transport device 10, magnetron oscillator 11, magnetron power source 12, cooling blower 13, water pump 14, transport sector 15, circulation air path 16, microwave upgrading device casing 17, movable breaking down shovel 18, vapour passage 19, agitator 20.
Embodiment
To be described in further detail the embodiment of the present invention below.
Two sections of continous way brown coal upgrading systems of the present invention, its preferably embodiment be:
Comprise the predrying system of Air Fluidized bed and microwave reinforced upgrading system, the brown coal after the process of described Air Fluidized bed predrying system are sent in described microwave reinforced upgrading system by conveying belt and are carried out microwave exposure process;
The predrying system of described Air Fluidized bed comprises Air Fluidized bed, the circulation air path of described Air Fluidized bed is provided with well heater, also comprise the air compressor, level pressure bellows chamber, valve, the under meter that connect successively, the outlet of described under meter is connected by the circulation air path of described well heater with described Air Fluidized bed;
Described microwave reinforced upgrading system comprises tunnel type micro wave upgrading device, and the casing inlet and outlet of described tunnel type micro wave upgrading device arranges energy suppresser.
The inlet and outlet of described conveying belt is provided with online Moisture Meter.
Described conveying belt is provided with belt speed setting device.
The casing ingress of described tunnel type micro wave upgrading device is provided with movable breaking down shovel.
Described movable breaking down shovel is connected with hydraulic push rod.
Fluidization phenomenon refers to the flow phenomenon of solid particulate under the effect of fluid (gas or liquid).Fluidization can be formed by gas and solid particulate, liquid and solid particulate and gas and liquid and solid particulate, i.e. so-called gas-solid fluidization, liquid-solid fluidization and gas-liquid-solid three-phase fluidization.Wherein maximum with gas-solid fluidization application in the industry.
Hot air fluidised bed drying is the one of dehydration by evaporation technology, its principle utilizes hot blast to jet from bottom, make solid-state stacking material generation fluidization, because warm air directly contacts with coal sample particle, and contact area is more than wanting large many under accumulation condition, thus can quick conductive, and in time moisture is taken out of, realize the rapid drying of brown coal.But, simple heat-force dry due to heat and mass direction contrary, reach its drying rate of certain degree of drying and have decline, and brown coal complex pore structure, oxygen-containing functional group can be caused to become many, make the interface stability of dry rear brown coal poor, on one section of pre-dried basis of Air Fluidized bed, therefore pass through the microwave reinforced upgrading of two sections, effectively can reduce pore volume and the specific surface area of brown coal, reduce brown coal surface oxygen functional group content, effectively improve the interface stability of brown coal.
The present invention utilizes the drying and upgrading of combined action realization to brown coal of one section of Air Fluidized bed drying+dehydration two sections of microwave reinforced upgrading, by the connection of travelling belt, reach quantity-produced object, have cost low, power consumption less, drying brown coal efficiency is high and produce the advantages such as continuous.
Solid substances drying curve as shown in Figure 4, before material arrives critical moisture content Mc, because the surface temperature of solid substances changes hardly, so drying rate also keeps constant; But when lower than critical moisture content Mc, the surface temperature of material can rise rapidly, and drying rate can decline to a great extent.In this figure dotted line show and reach critical moisture content Mc after the effect of microwave drying, this is because microwave has highly selective, only with water molecules generation energy exchange.Thus the application of microwave substantially increases dry efficiency, and reduce the temperature on surface, for preventing, the oxidation of brown coal surface active groups is significant simultaneously.
From figure, we can find, if use traditional hot air convective drying method, its time of drying will be very long, if hot air convective drying and microwave drying are combined, design is applicable to the travelling belt of length, just reach critical moisture content Mc when making material enter microwave drying district by hot air convective drying district, then will significantly be shortened whole time of drying.
Meanwhile, because microwave has heat effect and non-thermal effect concurrently: the oxygen-containing functional group on brown coal surface shows higher polarity, the absorption for microwave energy is comparatively strong, and under microwave field, the hertzian wave of HF oscillation is conducive to removing of these polar groups; In the process of brown coal moisture removal under microwave field, the destruction transformation effect of some high temperature and high pressure steams, make hole occur shrinking, the reaction of phenomenon of caving in concurrent rubber connection, the gum material of cooling for reflux also shutoff partial interior hole, causes the reduction of brown coal pore volume and specific surface area simultaneously.
Predrying by Air Fluidized bed before the upgrading of brown coal microwave, good economic benefit can be produced.Because microwave drying energy consumption is comparatively large, and the added value of product of brown coal itself non-specifically is high, thus by carrying out predrying with Air Fluidized bed, can reduce a large amount of power consumptions, environmental benefit is also very outstanding.
The present invention includes the conveying belt of the predrying system of Air Fluidized bed and microwave reinforced upgrading system and carried and transported material.
The predrying system of Air Fluidized bed comprises as lower device:
Air Fluidized bed, makes brown coal form fluidization on bed, with efficient rapid drying brown coal, reduces the water content of brown coal;
Well heater, heating drum enters the air of fluidized-bed, makes it become warm air, provides the heat power of brown coal drying;
Under meter, display enters the air quantity of fluidized-bed;
Valve, coordinates under meter to control to enter the air quantity of fluidized-bed;
Level pressure bellows chamber, obtains the airflow of fixation pressure;
Air compressor, blasts fresh air, provides the drying medium of brown coal drying.
Microwave reinforced upgrading system comprises as lower device:
Magnetron oscillator and auxiliary equipment thereof are magnetron oscillator energy supply, produce microwave, and cool vibrator;
Waveguide energy transport device, is transported in microwave dryer by the microwave that magnetron oscillator produces;
Tunnel drier, make predrying after brown coal accept the strengthening upgrading of microwave radiation wherein, remove moisture further, change pore texture;
Energy suppresser, prevents leaking of microwave radiation energy, is detrimental to health;
Steam discharge device, converges to the water vapor that microwave drying produces in vapour passage.
Beneficial effect of the present invention is:
1) cost is low: adopt Air Fluidized bed to carry out predrying, compared to simple microwave drying, greatly reduce power consumption;
2) efficiency is high: according to the drying characteristics of drying curve reaction, and the microwave radiation that two sections of employings have the efficiency utilization of strong selectivity and energy carries out strengthening drying and upgrading, and compared to traditional convective drying methods, the time shortens greatly;
3) exhaust emission is little: have water vapour recovery channel, and the material that drying and upgrading process is separated out discharges not directly to the external world;
4) capacity usage ratio is high, and one section adopts Air Fluidized bed predrying is the means that in simple dry technology, capacity usage ratio is higher, and two sections adopt microwave reinforced upgrading, and heat and mass transfer direction is consistent, is the technique means that strengthening segment capacity usage ratio is higher.
Compared to traditional brown coal method for upgrading, dehydration and interface stability dual requirements in the drying property of the present invention according to solid substances drying curve and brown coal upgrading, creatively propose the two sections of continous way brown coal upgrading systems taking one section of predrying+two sections of microwave reinforced upgrading of Air Fluidized bed, the economy of the upgrading both ensured, also there is efficient feature fast simultaneously, can also the interface stability of Effective Regulation brown coal.
Specific embodiment:
See accompanying drawing 1-3, present method comprises the conveying belt 15 of the predrying system of Air Fluidized bed and microwave reinforced upgrading system and carried and transported material.
Aforesaid method specific implementation process is as follows:
Air compressor 6 blasts fresh air and enters in level pressure bellows chamber 5, and control suitable air flow quantity by valve 4, its size is monitored by under meter 3.Air heater via 2 heat laggard enter in fluidized-bed 1, make the brown coal in 1 form fluidization, realize the rapidly and efficiently predrying of brown coal.
Brown coal one section obtain predrying after, reach the state of critical moisture content, enter in tunnel like upgrading device 7 with conveying belt and carry out two sections of microwave reinforced upgradings.Enter microwave upgrading device breaking down shovel 18 structure as shown in Figure 1: a block plate is curved obtuse angle shape, and stud with high-abrasive material on the surface contacted with material, driven by hydraulic push rod and move up and down, by the cooperation with feeder, can adjust according to ature of coal and other conditions the thickness of coal seam entering moisture eliminator flexibly.
The microwave entrance place of tunnel drier 7, is provided with mode stirrer 20, stirs the microwave of input, forms the mode of resonance needed, and makes heating more even.There is steam outlet 9 its upper end, and the water vapor produced after microwave drying is discharged thus, enters the span line of vapour passage 19.
The entrance end of tunnel drier 7 is all provided with energy suppresser 8, prevents leaking of microwave radiation and is detrimental to health.
Magnetron oscillator 11 is powered by magnetron power source 12, and the microwave of generation is transported to tunnel drier 7 by waveguide energy transport device 10.Owing to producing amount of heat in oscillator operation, therefore be configured with cooling blower 13 and carry out air-cooled and water pump and carry out water-cooled.
Brown coal are after one section of predrying+two sections of microwave reinforced upgrading of greenhouse-hot blast, and moisture reduces greatly, and pore texture is destroyed, and oxygen-containing functional group obtains partial removal, and interface stability improves.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (5)
1. one kind two sections continous way brown coal upgrading systems, it is characterized in that, comprise the predrying system of Air Fluidized bed and microwave reinforced upgrading system, the brown coal after the process of described Air Fluidized bed predrying system are sent in described microwave reinforced upgrading system by conveying belt and are carried out microwave exposure process;
The predrying system of described Air Fluidized bed comprises Air Fluidized bed, the circulation air path of described Air Fluidized bed is provided with well heater, also comprise the air compressor, level pressure bellows chamber, valve, the under meter that connect successively, the outlet of described under meter is connected by the circulation air path of described well heater with described Air Fluidized bed;
Described microwave reinforced upgrading system comprises tunnel type micro wave upgrading device, and the casing inlet and outlet of described tunnel type micro wave upgrading device arranges energy suppresser.
2. two sections of continous way brown coal upgrading systems according to claim 1, it is characterized in that, the inlet and outlet of described conveying belt is provided with online Moisture Meter.
3. two sections of continous way brown coal upgrading systems according to claim 2, it is characterized in that, described conveying belt is provided with belt speed setting device.
4. two sections of continous way brown coal upgrading systems according to claim 3, is characterized in that, the casing ingress of described tunnel type micro wave upgrading device is provided with movable breaking down shovel.
5. two sections of continous way brown coal upgrading systems according to claim 4, it is characterized in that, described movable breaking down shovel is connected with hydraulic push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648199.9A CN104388143A (en) | 2014-11-14 | 2014-11-14 | Two-stage continuous lignite upgrading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648199.9A CN104388143A (en) | 2014-11-14 | 2014-11-14 | Two-stage continuous lignite upgrading system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104388143A true CN104388143A (en) | 2015-03-04 |
Family
ID=52606107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410648199.9A Pending CN104388143A (en) | 2014-11-14 | 2014-11-14 | Two-stage continuous lignite upgrading system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104388143A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105219475A (en) * | 2015-10-28 | 2016-01-06 | 中国矿业大学 | Brown coal upgrading system and method for upgrading thereof |
| 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 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4259560A (en) * | 1977-09-21 | 1981-03-31 | Rhodes George W | Process for drying coal and other conductive materials using microwaves |
| CN1291920A (en) * | 1998-10-27 | 2001-04-18 | 川崎重工业株式会社 | Fluidized bed-carrying drying classifier |
| CN101738077A (en) * | 2009-05-11 | 2010-06-16 | 中信国安盟固利新能源科技有限公司 | Brown coal drying and dehydrating device |
| CN102261822A (en) * | 2011-05-19 | 2011-11-30 | 湖南科达粉体工程有限公司 | Device for drying lignite by microwave fluidization |
| CN102816623A (en) * | 2012-08-14 | 2012-12-12 | 南京三乐微波技术发展有限公司 | Coal quality improvement apparatus for microwave low temperature dehydration and desulfurization |
| CN103087796A (en) * | 2013-02-07 | 2013-05-08 | 中国矿业大学 | Process and system for vibration hot-pressing dehydration quality improvement of brown coal |
| CN103409198A (en) * | 2013-07-23 | 2013-11-27 | 山东天力干燥股份有限公司 | Drying, desulphurization and dehydration system and process for low-rank coal or coal slime |
-
2014
- 2014-11-14 CN CN201410648199.9A patent/CN104388143A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4259560A (en) * | 1977-09-21 | 1981-03-31 | Rhodes George W | Process for drying coal and other conductive materials using microwaves |
| CN1291920A (en) * | 1998-10-27 | 2001-04-18 | 川崎重工业株式会社 | Fluidized bed-carrying drying classifier |
| CN101738077A (en) * | 2009-05-11 | 2010-06-16 | 中信国安盟固利新能源科技有限公司 | Brown coal drying and dehydrating device |
| CN102261822A (en) * | 2011-05-19 | 2011-11-30 | 湖南科达粉体工程有限公司 | Device for drying lignite by microwave fluidization |
| CN102816623A (en) * | 2012-08-14 | 2012-12-12 | 南京三乐微波技术发展有限公司 | Coal quality improvement apparatus for microwave low temperature dehydration and desulfurization |
| CN103087796A (en) * | 2013-02-07 | 2013-05-08 | 中国矿业大学 | Process and system for vibration hot-pressing dehydration quality improvement of brown coal |
| CN103409198A (en) * | 2013-07-23 | 2013-11-27 | 山东天力干燥股份有限公司 | Drying, desulphurization and dehydration system and process for low-rank coal or coal slime |
Non-Patent Citations (1)
| Title |
|---|
| 涂亚楠: "颗粒级优化及界面改性提高褐煤成浆浓度的研究", 《中国博士学位论文全文数据库工程科技I辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105219475A (en) * | 2015-10-28 | 2016-01-06 | 中国矿业大学 | Brown coal upgrading system and method for upgrading thereof |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Rao et al. | Recent developments in drying and dewatering for low rank coals | |
| CN101260307B (en) | Brown coal drying quality-increasing device and technique | |
| CN106430901B (en) | Sludge dehumidifying and drying system | |
| CN102690035B (en) | System and process for drying sludge using pulse combustion internal heating fluid bed | |
| CN102759253B (en) | Flue gas fluidized bed lignite drying system provided with internal heat source and integrated to heat-engine plant | |
| CN102353237A (en) | High-moisture-content lignite predrying method and system integrated with thermal power plant | |
| CN103807868B (en) | Be applicable to the internal heating fluidized bed drying system of brown coal air cooling turbo-generator | |
| CN102410705A (en) | Multistage continuous overheated steam drying system and method of low-rank coal | |
| CN103087796B (en) | Lignite vibration hot-pressing dehydration upgrading process and system | |
| JP6063257B2 (en) | Operation method of drying system comprising heat pump unit and exhaust heat recovery mechanism | |
| CN109945611A (en) | A kind of tray drying device of moisture reuse and combined heated | |
| CN104388143A (en) | Two-stage continuous lignite upgrading system | |
| GB2499970A (en) | System for removing moisture from coal | |
| CN113091443B (en) | Transient dehydration upgrading and warm-pressing instant device system for lignite | |
| CN102997634B (en) | Moving bed brown coal drying method and device | |
| CN103304124A (en) | Sludge drying treatment system and process | |
| CN204301412U (en) | A kind of rapid draing fluid bed | |
| CN202350434U (en) | Overheated steam multi-stage continuous drying system for low rank coal | |
| CN102661658B (en) | Air flow and high frequency combined lignite drying device and process | |
| CN109737695A (en) | A kind of lignite fluidized bed drying system of ultrasonic wave auxiliary | |
| CN104710094A (en) | Printing and dyeing sludge drying method and apparatus thereof | |
| CN111829324B (en) | Heat pump drying system and method | |
| Yang et al. | Brown coal drying processes-a review | |
| RU2039918C1 (en) | Method of drying water-containing material at electric power station and device for its realization | |
| CN103673534A (en) | Brown coal drying water-lifting recycling system using waste heat of power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150304 |
|
| RJ01 | Rejection of invention patent application after publication |