CN202361754U - Lignite drying system - Google Patents
Lignite drying system Download PDFInfo
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- CN202361754U CN202361754U CN2011204986079U CN201120498607U CN202361754U CN 202361754 U CN202361754 U CN 202361754U CN 2011204986079 U CN2011204986079 U CN 2011204986079U CN 201120498607 U CN201120498607 U CN 201120498607U CN 202361754 U CN202361754 U CN 202361754U
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- flue gas
- bed dryer
- fluid bed
- deduster
- vibrating fluid
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Abstract
The utility model discloses a lignite drying system, which includes a hot wind system, a vibrated fluidized bed dryer, a nitrogen system and a dust removal system. The hot wind system includes a flue gas producer, which includes a combustion chamber used for producing high-temperature flue gas, and a wind mixing chamber used for fully mixing high-temperature flue gas with air to form work flue gas needed to dry lignite; the wind mixing chamber of the flue gas producer is connected with an air pipeline; the wind mixing chamber of the flue gas producer is communicated with the vibrated fluidized bed dryer through a gas inlet pipeline so as to introduce the work flue gas into the vibrated fluidized bed dryer to dry the lignite; the top of the vibrated fluidized bed dryer is connected with the dust removal system through a gas outlet pipeline; and the nitrogen system is connected with the front end of the vibrated fluidized bed dryer, and is used for introducing nitrogen into the vibrated fluidized bed dryer. The lignite drying system provided by the utility model and the drying method thereof can rapidly and efficiently dry lignite, and ensure the safety during the drying process.
Description
Technical field
The utility model relates to the dry materials field, relates in particular to the drying system of brown coal.
Background technology
Brown coal are a kind of moisture and volatile content is higher, calorific capacity is lower low order coal.Along with demands for energy is increased day by day, the yield of brown coal is quick growing trend.But, make the application of brown coal receive serious restriction because of its calorific capacity is lower.Market presses for the advanced practical technology of developing, and the brown coal raw coal is carried out upgrading processing, improves the economic worth of brown coal.
At present, generally acknowledge that feasible brown coal process for upgrading method mainly contains two types of physics upgrading and chemical upgradings.The physics upgrading is to adopt all kinds of drying equipments to reduce the brown coal water content; The chemistry upgrading mainly is to adopt distillation process that brown coal are processed into semicoke and tar.At present these two types of process for upgrading ubiquities of application implementation single cover unit treating capacity little, the perhaps high shortcoming of production cost.
The coal drying method of conventional physical physique is to adopt 500 ℃～700 ℃ high-temperature flue gas that coal slime or clean fine coal are carried out drying.Because the brown coal fugitive constituent is high, burning-point is low, when adopting traditional high temperature drying method that brown coal are carried out dried, exist that fugitive constituent is separated out, problem such as inflammable and explosive.And above-mentioned drying means also exists drying efficiency lower, is difficult to solve the low problem of unit treating capacity.
The utility model content
The utility model technical problem to be solved provides a kind of brown coal high-efficiency dehydration and high brown coal drying system of production capacity of realizing.
In order to solve the problems of the technologies described above; The utility model has adopted following technical scheme: a kind of brown coal drying system; Comprise hot-air system, vibrating fluid bed dryer, nitrogen system and dust pelletizing system; Said hot-air system comprises the flue gas producer; Said flue gas producer comprises and is used to produce the combustion chamber of high-temperature flue gas and makes high-temperature flue gas and air fully mix the wind mixed chamber that forms the required work flue gas of dry coal charge; The wind mixed chamber of said flue gas producer is connected with air duct; The wind mixed chamber of said flue gas producer is communicated with said vibrating fluid bed dryer in said vibrating fluid bed dryer through admission line and feeds said work flue gas coal charge is carried out drying, and said vibrating fluid bed dryer top is connected with dust pelletizing system through outlet pipe, and said nitrogen system is connected with the front end of said vibrating fluid bed dryer and is used in said vibrating fluid bed dryer, feeding nitrogen.
As preferably; Said dust pelletizing system comprises first deduster, second deduster and the 3rd deduster; Said first deduster is connected to the upper end of the middle front part of said vibrating fluid bed dryer through first outlet pipe; Said second deduster is connected with said first deduster, and said second deduster is connected with chimney through discharge duct, and first air-introduced machine is set on the said discharge duct; Said the 3rd deduster is connected to the upper end at the rear portion of said vibrating fluid bed dryer through second outlet pipe.
As preferably, said first deduster and the 3rd deduster all adopt cyclone dust collectors, and said second deduster is the strap deduster.
As preferably; The flue gas producer of said hot-air system is connected with the middle front part of said vibrating fluid bed dryer through first admission line and is used for the part flue gas of working is sent into the middle front part of said vibrating fluid bed dryer, is used for another part work flue gas is sent into the rear portion of said vibrating fluid bed dryer through the rear portion of second admission line and said vibrating fluid bed dryer; Connect first air blast on said first admission line, connect second air blast on said second admission line; Said the 3rd deduster is connected with the wind mixed chamber of said flue gas producer through return-air duct, connects second air-introduced machine on the said return-air duct.
As preferably; Said vibrating fluid bed dryer is a large-scale multi-cavity chamber vibrating fluid bed dryer; Between adjacent two chambers for being flexible coupling; The feed end of said vibrating fluid bed dryer is provided with the brown coal material that needs are dry and is distributed to the rotary feeding valve on the bed surface uniformly, and the discharge end of said vibrating fluid bed dryer is provided with the rotation blow-off valve that dried brown coal material is discharged.
As preferably, said nitrogen system comprises nitrogen gas generator and is connected with said nitrogen gas generator and be used to store the nitrogen that said nitrogen gas generator generates, and is blown into the nitrogen pot of nitrogen to said vibrating fluid bed dryer and/or second deduster.
As preferably, also comprise and utilize the brown coal coal cinder to prepare coal gas and the coal gas of preparation is sent into the gas generator of said flue gas producer with the coal dust in the combustion-supporting said flue gas producer.
Compared with prior art, the beneficial effect of the brown coal drying system of the utility model is:
1, the utility model employing vibrating fluid bed dryer is a main frame; The hot flue gas that utilizes low oxygen content is as dry heat transferring medium; Pyrology, vibration and hydrodynamics are organically combined; Making needs dry brown coal material with high heat transfer rate's rapid draing, thereby realizes the maximization of single cover unit treating capacity.
2, adopt temperature difference control device, the temperature of the work flue gas of each chamber of feeding vibrating fluid bed dryer can be regulated according to the amount of anhydrating is different with air quantity.The temperature of vibrating fluid bed dryer front end chamber and air quantity can be slightly higher, with the moisture of abundant removal brown coal material; The temperature and the air quantity of vibrating fluid bed dryer rear end chamber can be more lower slightly, guarantee superheating phenomenon to occur from the unlikely brown coal material too high or that the part particle is less of brown coal temperature of charge that the discharge end of vibrating fluid bed dryer comes out.
3, can suitably increase and decrease the quantity of the chamber of vibrating fluid bed dryer according to brown coal material moisture difference and the difference that requires the amount of anhydrating,, prevent the generation of brown coal material super-dry phenomenon to reach the purpose that appropriateness is anhydrated.
4, the coal dust that can dust pelletizing system be collected is as the fuel of flue gas producer; The wind mixed chamber that simultaneously the useless flue gas of the low humidity of vibrating fluid bed dryer back side chamber after dedusting is sent into the flue gas producer as the part of work flue gas carries out air distribution; Bleed off the useless flue gas of high humility of front end chamber; With energy savings, reduce oxygen content, avoid high wet flue gas in intrasystem supersaturation.
Description of drawings
Fig. 1 is the structural representation of brown coal drying system of the embodiment of the utility model.
Description of reference numerals
1-flue gas producer 2-air duct
3-vibrating fluid bed dryer 4-first deduster
The 5-second deduster 6-the 3rd deduster
7-discharge duct 8-chimney
The 9-first air-introduced machine 10-first outlet pipe
The 11-second outlet pipe 12-first belt feeder
The 13-first admission line 14-second admission line
The 15-first air blast 16-second air blast
17-return-air duct 18-second air-introduced machine
The 19-first chamber 20-second chamber
21-the 3rd chamber 22-second belt feeder
23-nitrogen gas generator 24-nitrogen pot
25-the 3rd belt feeder
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail, but not as the qualification to the utility model.
As shown in Figure 1; The brown coal drying system of the embodiment of the utility model; Be used for the brown coal material of particle size range below 50mm carried out drying; Comprise hot-air system, vibrating fluid bed dryer 3, nitrogen system and dust pelletizing system, wherein, said hot-air system comprises flue gas producer 1; Flue gas producer 1 has combustion chamber and wind mixed chamber; The high-temperature flue gas that said combustion chamber produces fully mixes formation work flue gas with the air that gets into from air duct 2 in wind mixed chamber, said work flue gas gets into 3 pairs of coal charges of vibrating fluid bed dryer and carries out drying under the effect of admission line at air blast, and flue gas producer 1 is communicated with vibrating fluid bed dryer 3 through admission line and feeds said work flue gas to the bottom of vibrated fluidized bed 3.Vibrating fluid bed dryer 3 tops are connected with said dust pelletizing system through outlet pipe, and said nitrogen system is connected with the front end of vibrating fluid bed dryer 3 and is used in vibrating fluid bed dryer 3, feeding nitrogen.
A kind of preferred version as present embodiment; Said dust pelletizing system comprises first deduster 4, second deduster 5 and the 3rd deduster 6; First deduster 4 is connected to the upper end of the middle front part of vibrating fluid bed dryer 3 through first outlet pipe 10; Second deduster 5 is connected with first deduster 4, and second deduster 7 is connected with chimney 8 through discharge duct 7, and first air-introduced machine 9 is set on the discharge duct 7; The 3rd deduster 6 is connected to the upper end at the rear portion of vibrating fluid bed dryer 3 through second outlet pipe 11.First deduster 4 and the 3rd deduster 6 all adopt cyclone dust collectors, and are multitube pottery cyclone dust collectors, and second deduster 5 is a sack cleaner.
The work flue gas is as the heat transferring medium of accomplishing the brown coal dry materials, and when building dry engineering in the brown coal producing region, the coal dust that dust pelletizing system capable of using is collected acts as a fuel the preparation work flue gas, the better like this recycling problem that has solved coal dust; When building the brown coal drying project in the brown coal power plant, the saturated vapor that the useless flue gas in power plant capable of using or useless flue gas mixing portion electricity generation boiler produce obtains the work flue gas, and the coal dust that dust pelletizing system is collected is used as the fuel of electricity generation boiler.
As shown in Figure 1; When brown coal producing region preparation work flue gas; The general flue gas producer that adopts a kind of coal dust direct injection; Mixed combustion produces high temperature (800 ℃～1100 ℃) flue gas in the combustion chamber of flue gas producer 1 with coal dust and combustion air; The useless flue gas mixing air distribution that in the wind mixed chamber of flue gas producer 1, refluxes with the part air and after 6 dedustings of the 3rd deduster, obtain temperature required scope about 240 ℃～320 ℃ with oxygen content at the work flue gas 14% below, realization is to the efficient drying of brown coal material.The setting of work flue gas optimum temperature is chosen according to the actual condition of engineering project.If the collected coal dust calorific value lower (being lower than 3500kcal/kg) from the dust pelletizing system below then also need utilize part brown coal lump coal, prepare part coal gas through the gas generator (not shown) and fill into next combustion-supporting coal dust in the flue gas producer 1.
As the another kind of preferred version of present embodiment, a work flue gas part of coming out from the wind mixed chamber of flue gas producer 1 is connected to the middle front part of vibrating fluid bed dryer 3 through first admission line 13, connects first air blast 15 on first admission line 13; Another part flue gas is connected to the rear portion of vibrating fluid bed dryer 3 through second admission line 14, connects second air blast 16 on second admission line 14; The 3rd deduster 6 is connected with the wind mixed chamber of flue gas producer 1 through return-air duct 17; Connect second air-introduced machine 18 on the return-air duct 17; Make the work flue gas carry out useless flue gas that dry back forms and turn back to flue gas producer 1 and participate in air distribution brown coal, with the oxygen content of control work flue gas below 14%.
Work flue gas through the wind mixed chamber of flue gas producer 1 comes out is assigned under the bed surface of vibrating fluid bed dryer 3 through first admission line 13 and second admission line 14 respectively by first air blast 15 and second air blast 16, and sets up bed surface and the material bed pressure of the brown coal on the bed surface that enough passes vibrating fluid bed dryer 3.Be assigned to the work flue gas flow in each chamber of each position under the bed surface of vibrating fluid bed dryer 3 or multi-cavity chamber combined type vibrating fluid bed dryer 3, can regulate as required.According to the difference that the user requires the brown coal material amount of anhydrating, the asynchronism(-nization) that the brown coal drying system is required, vibrating fluid bed dryer 3 can select single chamber, also can select the multi-cavity chamber.Brown coal drying project for year 1000000 tons of treating capacities, the amount of anhydrating 25% adopts a cover three chamber combined type vibrating fluid bed dryers can meet the demands fully.Be that the vibrating fluid bed dryer 3 shown in the present embodiment is three chamber combined type vibrated fluidized beds, between adjacent two chambers for being flexible coupling.Too high for preventing that coal charge from heating up; Can be through changing the way of air distribution ratio; Make first chamber 19 and second chamber 20 of the work flue gas entering vibrating fluid bed dryer 3 of higher temperature, making last chamber of the work flue gas entering vibrating fluid bed dryer 3 of lower temperature is the 3rd chamber 21.The brown coal material is fluidized state and advances on the bed surface of vibrated fluidized bed 1; The work flue gas pass behind the bed surface of vibrating fluid bed dryer 3 with the brown coal material fast, heat exchange fully, carry moisture and parts of fine coal dust entering dust pelletizing system that the brown coal material is deviate from then.The work flue gas that gets into the 3rd chamber 21 passes the coal seam after second outlet pipe 11 carries out coal powder collection through the 3rd deduster 6, and the wind mixed chamber that useless flue gas returns flue gas producer 1 participates in air distribution, with the oxygen content of control work flue gas; The work flue gas that gets into first chamber 19 and second chamber 20 passes the coal seam after first outlet pipe 10 is discharged by chimney 8 through the abundant purification back of first deduster 4 and second deduster 5.The useless flue gas that returns wind mixed chamber's participation air distribution of flue gas producer 1 generally obtains from the tail end of vibrating fluid bed dryer 3, and the water content of the useless flue gas of this part is much smaller than the water content of the useless flue gas of vibrating fluid bed dryer 3 leading portions discharge.The temperature of the useless flue gas of drawing from vibrating fluid bed dryer 3 is controlled at about 80 ℃, to prevent useless flue gas dewfall before discharging.The coal dust that first deduster 4, second deduster 5 and the 3rd deduster 6 are collected is delivered to flue gas producer 1 by the 3rd belt feeder 25 that is provided with thereunder; Fuel as flue gas producer 1; Thereby better solved the recycling problem of coal dust, also effectively reduced the cost of brown coal drying.
The brown coal raw coal is sent into the anterior feed end of vibrating fluid bed dryer 3 by second belt feeder 22, comparatively equably the brown coal material is distributed on the bed surface of vibrating fluid bed dryer 3 through the rotary feeding valve.The brown coal material is fluidized state and advances forward under the double action of exciting force that bed surface transmits and work flue gas buoyancy, through each chamber of vibrating fluid bed dryer 3, and with the quick heat exchange of work flue gas, deviate from moisture.Moisture that the brown coal material is deviate from and part coal dust are drawn by first air-introduced machine 9 and second air-introduced machine 18 from the top of vibrating fluid bed dryer 3 with useless flue gas.The brown coal material dehydrates in vibrating fluid bed dryer 3 after rotate blow-off valve and discharge, and delivers to readymade coal stockyard or coal store through first belt feeder 12.The speed of brown coal dry materials dehydration can be passed into the material bed thickness of brown coal on flow and the bed surface of the work flue gas in the vibrating fluid bed dryer 3 through conciliation, and the temperature behind the brown coal dry materials generally is controlled at about 80 ℃.
If the content of ashes of brown coal raw coal is bigger, before entering vibrating fluid bed dryer 3 carried out drying, the gangue of part was removed in the dry separation of the advanced row of selection by winnowing unit capable of using, reduces coal ash.
As another preferred version of embodiment, the brown coal drying system of the utility model also comprises nitrogen gas generator 23 and nitrogen pot 24, and nitrogen pot 24 is connected with nitrogen gas generator 23 and is used for the nitrogen that stored nitrogen generator 23 generates.Nitrogen is sack cleaner blowback cloth bag with the source of the gas of the coal dust that adheres on the cloth bag of removing second deduster 5 as second deduster 7.In addition, when occurring the situation that the work flue gas oxygen content exceeds standard in the vibrating fluid bed dryer 3, promptly in vibrating fluid bed dryer 3, charge into part nitrogen,, prevent that coal dust from firing to reduce the oxygen content of work flue gas.If coal dust is accumulated in the part, also utilize nitrogen to purge in the vibrating fluid bed dryer 3.
The utility model can adopt the control system through detecting the intrasystem various technical parameters of brown coal drying gathered, and comes the duty of Adjustment System, controls the stable operation of whole brown coal drying system.The technological parameter that detects and control mainly contains: coal input quantity, coal output, the temperature of producing coal; Flow, temperature, the pressure of work flue gas and useless flue gas; Oxygen content, carbon monoxide content, the fugitive constituent amount of separating out in the fluid bed; The amplitude of fluid bed, frequency etc.
To sum up, the brown coal drying system of the utility model has following comparatively outstanding beneficial effect:
1) adopting multi-cavity chamber combined type vibrating fluid bed dryer is main frame, is that heat transferring medium carries out brown coal drying with hypoxemia (in the oxygen content 14%) work flue gas (about 300 ℃), realizes the brown coal high-efficiency dehydration, realizes the maximization of single cover unit treating capacity.
2) the work flue gas of supplying with each section of vibrated fluidized bed or each chamber can be realized differential temperature control; Divide different chambers in the wind mixed chamber like flue gas producer 1; The temperature of the mixed work flue gas in the control different chamber is different; As in first chamber 19 of vibrating fluid bed dryer 3 and second chamber 20, charging into the work flue gas that temperature is higher or flow is bigger, and in the 3rd chamber 21, charge into the work flue gas that temperature is lower or flow is slightly little, to obtain best drying effect.
3) can be according to the difference of the desired amount of anhydrating, the chamber quantity of increase and decrease vibrating fluid bed dryer 3, as the water yield that requires to remove is bigger, then increases the chamber quantity of vibrated fluidized bed, otherwise, then reduce the quantity of chamber.
4), coal seam thickness and coal charge gait of march can be regulated within the specific limits through the inlet amount of control brown coal material.
5) coal dust collected of brown coal drying process is used for the preparation work flue gas, and it is fully used.
6) adopt the control system detect oxygen content in the vibrated fluidized bed, with nitrogen as ensureing with oxygen content in the reduction vibrated fluidized bed and the mode that in vibrated fluidized bed, feeds the work flue gas of hypoxemia (oxygen content is lower than 14%); Guarantee the possibility of avoiding the brown coal drying process to fire to have guaranteed the security of brown coal drying system.
Above embodiment is merely the exemplary embodiment of the utility model, is not used in restriction the utility model, and the protection domain of the utility model is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the utility model in the essence and protection domain of the utility model, this modification or be equal to replacement and also should be regarded as dropping in the protection domain of the utility model.
Claims (7)
1. brown coal drying system; It is characterized in that; Comprise hot-air system, vibrating fluid bed dryer, nitrogen system and dust pelletizing system; Said hot-air system comprises the flue gas producer; Said flue gas producer comprises the combustion chamber that is used to produce high-temperature flue gas and makes high-temperature flue gas and air fully mix the wind mixed chamber that forms the required work flue gas of dry coal charge, and the wind mixed chamber of said flue gas producer is connected with air duct, and the wind mixed chamber of said flue gas producer is communicated with said vibrating fluid bed dryer through admission line that the said work flue gas of feeding carries out drying to coal charge in said vibrating fluid bed dryer; Said vibrating fluid bed dryer top is connected with dust pelletizing system through outlet pipe, and said nitrogen system is connected with the front end of said vibrating fluid bed dryer and is used in said vibrating fluid bed dryer, feeding nitrogen.
2. brown coal drying according to claim 1 system; It is characterized in that; Said dust pelletizing system comprises first deduster, second deduster and the 3rd deduster, and said first deduster is connected to the upper end of the middle front part of said vibrating fluid bed dryer through first outlet pipe, and said second deduster is connected with said first deduster; Said second deduster is connected with chimney through discharge duct, and first air-introduced machine is set on the said discharge duct; Said the 3rd deduster is connected to the upper end at the rear portion of said vibrating fluid bed dryer through second outlet pipe.
3. brown coal drying according to claim 2 system is characterized in that said first deduster and the 3rd deduster all adopt cyclone dust collectors, and said second deduster is the strap deduster.
4. brown coal drying according to claim 1 system; It is characterized in that; The flue gas producer of said hot-air system is connected with the middle front part of said vibrating fluid bed dryer through first admission line and is used for the part flue gas of working is sent into the middle front part of said vibrating fluid bed dryer, is used for another part work flue gas is sent into the rear portion of said vibrating fluid bed dryer through the rear portion of second admission line and said vibrating fluid bed dryer; Connect first air blast on said first admission line, connect second air blast on said second admission line; Said the 3rd deduster is connected with the wind mixed chamber of said flue gas producer through return-air duct, connects second air-introduced machine on the said return-air duct.
5. brown coal drying according to claim 1 system; It is characterized in that; Said vibrating fluid bed dryer is a large-scale multi-cavity chamber vibrating fluid bed dryer; For being flexible coupling, the feed end of said vibrating fluid bed dryer is provided with the brown coal material that needs are dry and is distributed to the rotary feeding valve on the bed surface uniformly between adjacent two chambers, and the discharge end of said vibrating fluid bed dryer is provided with the rotation blow-off valve that dried brown coal material is discharged.
6. brown coal drying according to claim 1 system; It is characterized in that; Said nitrogen system comprises that nitrogen gas generator and being connected with said nitrogen gas generator is used to store the nitrogen that said nitrogen gas generator generates, and is blown into the nitrogen pot of nitrogen to said vibrating fluid bed dryer and/or second deduster.
7. brown coal drying according to claim 1 system is characterized in that, also comprises utilizing the brown coal coal cinder to prepare coal gas and the coal gas of preparation being sent into the gas generator of said flue gas producer with the coal dust in the combustion-supporting said flue gas producer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204986079U CN202361754U (en) | 2011-12-02 | 2011-12-02 | Lignite drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204986079U CN202361754U (en) | 2011-12-02 | 2011-12-02 | Lignite drying system |
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| Publication Number | Publication Date |
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| CN202361754U true CN202361754U (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204986079U Expired - Fee Related CN202361754U (en) | 2011-12-02 | 2011-12-02 | Lignite drying system |
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| CN (1) | CN202361754U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103134270A (en) * | 2011-12-02 | 2013-06-05 | 秦皇岛秦冶重工有限公司 | Lignite drying system and lignite drying method |
| CN105021020A (en) * | 2014-08-26 | 2015-11-04 | 呼伦贝尔东能化工有限公司 | Dust removal and collection method for lignite drying system |
| CN105300034A (en) * | 2015-12-07 | 2016-02-03 | 东北大学 | Vibration fluidization microwave multi-element drying device used for low-rank coal upgrading |
| CN108679988A (en) * | 2018-06-08 | 2018-10-19 | 中国成达工程有限公司 | A kind of non-direct contact lignite drying unit and stoving process |
| CN116542832A (en) * | 2023-03-13 | 2023-08-04 | 羚羊环保科技有限公司 | Lignite upgrading and drying environment monitoring system and method based on Internet of things |
-
2011
- 2011-12-02 CN CN2011204986079U patent/CN202361754U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103134270A (en) * | 2011-12-02 | 2013-06-05 | 秦皇岛秦冶重工有限公司 | Lignite drying system and lignite drying method |
| CN105021020A (en) * | 2014-08-26 | 2015-11-04 | 呼伦贝尔东能化工有限公司 | Dust removal and collection method for lignite drying system |
| CN105300034A (en) * | 2015-12-07 | 2016-02-03 | 东北大学 | Vibration fluidization microwave multi-element drying device used for low-rank coal upgrading |
| CN108679988A (en) * | 2018-06-08 | 2018-10-19 | 中国成达工程有限公司 | A kind of non-direct contact lignite drying unit and stoving process |
| CN116542832A (en) * | 2023-03-13 | 2023-08-04 | 羚羊环保科技有限公司 | Lignite upgrading and drying environment monitoring system and method based on Internet of things |
| CN116542832B (en) * | 2023-03-13 | 2023-09-12 | 羚羊环保科技有限公司 | Lignite upgrading and drying environment monitoring system and method based on Internet of things |
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