CN207350357U - A kind of boiler plant for being used for lignite and jet coal - Google Patents
A kind of boiler plant for being used for lignite and jet coal Download PDFInfo
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- CN207350357U CN207350357U CN201721178709.6U CN201721178709U CN207350357U CN 207350357 U CN207350357 U CN 207350357U CN 201721178709 U CN201721178709 U CN 201721178709U CN 207350357 U CN207350357 U CN 207350357U
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- 239000003245 coal Substances 0.000 title claims abstract description 192
- 239000003077 lignite Substances 0.000 title claims abstract description 96
- 238000001035 drying Methods 0.000 claims abstract description 96
- 239000002817 coal dust Substances 0.000 claims abstract description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 13
- 239000003546 flue gas Substances 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract description 30
- 238000010248 power generation Methods 0.000 abstract description 7
- 239000002360 explosive Substances 0.000 abstract description 5
- 239000004071 soot Substances 0.000 abstract description 3
- 241000196324 Embryophyta Species 0.000 description 26
- 238000002485 combustion reaction Methods 0.000 description 14
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- 239000000843 powder Substances 0.000 description 12
- 230000018044 dehydration Effects 0.000 description 11
- 238000006297 dehydration reaction Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
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- 230000005611 electricity Effects 0.000 description 6
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 239000002802 bituminous coal Substances 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
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Abstract
It the utility model is related to a kind of for lignite and the boiler plant of jet coal, including high-efficiency pulverized coal storehouse, air blower and the boiler for putting the coal dust after drying and upgrading, air blower is connected with boiler by pipeline, and the pipeline between air blower and boiler is connected with high-efficiency pulverized coal storehouse.Its advantage is：Boiler plant need not install pulverized coal preparation system, and the coal after the drying and upgrading that burns can improve unit efficiency, reduce the power consumption of the subsidiary engines such as air-introduced machine, so as to reduce coal consumption for power generation, while can also reduce CO2、NOxDischarge.Boiler coal feeding device structure provided by the utility model is simple, safe for operation, versatility is good.Without using bulky pulverized coal preparation system, economize the land resource；Drying and upgrading system can be coordinated to control with boiler, and input cost is relatively low；Eliminate the inflammable and explosive security risk of pulverized coal preparation system.It can also make use lignite and the jet coal of power plant safely, economic, lignite and jet coal are easily exploited, and price is generally relatively low, reduces power plant soot cost.
Description
Technical field
Coal electrical domain is the utility model is related to, it is more particularly to a kind of for lignite and the boiler plant of jet coal.
Background technology
Power industry occupies an important position in Chinese national economy, be Chinese society economic stability operation and it is sustainable
The important leverage of development.The energy industry important as China, power industry enterprise is in terms of energy-saving and emission-reduction, realizing low carbon development
It is duty-bound.The energy resource structure in China's " rich coal, oil-poor, few gas ", determines that coal electricity in the following quite a while is still China
The main force of power generation.
Power plant all at present, which all matches somebody with somebody, has power station boiler pulverizing system, shown in Figure 1, existing station boiler powder system
System includes pressure fan 103, mill exhauster 104, coal bunker 105, coal pulverizer 106, tailing separator 107, pulverized-coal collector 108 and powder cabin
109, the coal outlet of coal bunker 105 is connected with coal pulverizer 106, and the outlet of coal pulverizer 106 is separated with coarse powder successively through coal dust pipeline
Device 107, pulverized-coal collector 108 are connected, and entrance of another outlet of tailing separator 107 also with coal pulverizer 106 is connected
Logical, the outlet of pulverized-coal collector 108 is divided into air pipe line and coal dust pipeline two parts, wherein, coal dust pipeline is through powder cabin 109 and burning
Device is connected, and air pipe line divides for two-way through mill exhauster 104, wherein being directly entered boiler furnace 101, another way and coal pulverizer all the way
106 entrance connection, pressure fan 103 is connected with the entrance of coal pulverizer 106, and suction ventilator 102 is by the tail in boiler furnace 101
Aspiration goes out, and is discharged through chimney.
In traditional pulverized-coal fired boiler, it is that the indivisible combustion system collectively constituted with boiler combustion equipment is overall
Pith.At present, the unit pulverized coal preparation system of a set of pulverized coal preparation system is generally separately configured in domestic power plant using every boiler controller system.
There are problems for existing unit pulverized coal preparation system：1st, pulverized coal preparation system is huge, takes substantial amounts of land resource；2nd, Mei electricity enterprises need
Raw coal field storage bunker coal is established, and drying loft is set in coal yard, the impurity in raw coal feed system installs removing raw coal additional
Facility and crushing plant etc.；3rd, unit pulverized coal preparation system equipment allowance is higher, and there are stock number to take；4th, due to generally using at present
A set of pulverized coal preparation system is separately configured in unit pulverized coal preparation system form, every boiler controller system, and coordination control planning is not close between unit,
Pulverized coal preparation system initial cost is big, it is impossible to large-scale production.5th, the security and economy of pulverized coal preparation system and unit are closely related.It is coal-fired
The pulverized coal preparation system of generating set is huge, operating condition is severe, and failure rate is higher, be unit unplanned outage principal element it
One, the safety and economic operation of pulverized coal preparation system directly affects the normal operation of generating set.Mei electricity enterprises pulverized coal preparation and burned
Cheng Zhong, spontaneous combustion of pulverized coal, explosion issues are frequently run onto for high volatile coal, particularly in bin storage type pulverizing system, by
Conveyed in coal dust and stacking link is more, pulverized coal preparation system is easy to since spontaneous combustion of pulverized coal sets off an explosion.Although with boiler powder system
The improvement and development of system, heavy duty boiler all employ unit pulverized-coal system substantially, reduce coal dust because stacking state is easy
The link of spontaneous combustion, but still there are the hidden danger of coal dust explosion in pulverized coal preparation system, not only damages equipment, but the serious threat person and
The safety of unit, adds unit outage rate and cost of labor and maintenance cost.6th, pulverized coal preparation system is the dirt of coal electricity enterprise-essential
One of dye source.Pulverized coal preparation system generally leaks out seriously, and dust pollution is serious, while the noise pollution that coal pulverizer produces is very big.And
The accident once pulverized coal preparation system occurs exploding etc., can produce serious environmental pollution.
At present, domestic power coal market is in short supply, and state's ore deposit power coal price remains high.To ensure that the steady in a long-term of electric coal supplies
Should, and Power Plant Fuel cost is controlled, a large amount of power plant, which start to explore and test to mix in all kinds of coal units, burns cheap length
Flame coal and lignite.Jet coal is a kind of minimum bituminous coal of degree of metamorphism, is the most young bituminous coal that degree of coalification is only above lignite, it
Volatile matter it is especially high, flame is grown during burning.Lignite is degree of coalification than relatively low pit coal, be after peat deposits through dehydration,
Compacting is changed into the product at initial stage of organic-biological rock, because appearance is brown or crineous gain the name.Lignite is that a kind of reserves are huge
Colm, lignite accounts for the 18% of China's power coal reserves, is distributed mainly on the areas such as the Inner Mongol, three provinces in the northeast of China and Yunnan.
Lignite have volatile matter high (Vdaf ＞ 37%), moisture it is high (total moisture is about 30%, free moisture mostly more than 19%), fever
The features such as measuring low (about 12.56MJ/kg), ash fusion point low (about 1150 DEG C), low (the HGI 50-70) of abrasiveness and easy spontaneous combustion.It is brown
The characteristics of coal " two high three is low ", determines that the use of lignite has technical barrier.Because lignite moisture is higher, jet coal and lignite are equal
It is inflammable and explosive, power plant dried bean noodles drying system processing jet coal and lignite, there are explosion safety hidden danger, become restrict power plant use or
Mix the key factor for burning jet coal and lignite.
Furthermore jet coal and lignite water content are high, the transport to lignite, storage and burning all bring larger difficulty,
Greatly constrain application of the lignite in field of thermal power.Direct combusting brown coal, which carries out power generation, can cause electricity generation system efficiency far low
In the power station for using fat coal.
To sum up, boiler of power plant system includes pulverized coal preparation system at present, and pulverized coal preparation system is dangerous, cost is high, due to lignite
Water content is larger, and lignite and jet coal volatile matter height are inflammable and explosive, and existing pulverized coal preparation system is used for lignite and jet coal powder, exists
The problem of spontaneous combustion and explosion, it can not ensure the economical operation of equipment, the safety of the person and boiler.Therefore, the utility model provides
One kind is simple in structure, safe for operation, versatility is good, and what lignite and jet coal can be used for boiler power generation be used for lignite and long flame
The boiler plant of coal, is that the wound of the utility model grinds motivation.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, there is provided a kind of simple in structure, safe for operation, general
Property it is good, lignite and jet coal can be used for the boiler plant for being used for lignite and jet coal of boiler power generation.The utility model
Boiler plant is for the lignite and jet coal after the drying and upgrading that burns.
A kind of boiler plant for being used for lignite and jet coal provided by the utility model, its technical solution are：
A kind of boiler plant for lignite and jet coal, including for putting the high-efficiency pulverized coal of the coal dust after drying and upgrading
Storehouse, air blower and boiler, air blower are connected with boiler by pipeline, and the pipeline between air blower and boiler connects with high-efficiency pulverized coal storehouse
Connect.
Preferably, boiler plant is made of high-efficiency pulverized coal storehouse, air blower and boiler.
Preferably, boiler plant includes drying and upgrading system, and drying and upgrading system is connected with high-efficiency pulverized coal storehouse.
Preferably, drying and upgrading system includes drying device, separator and deduster, and drying device is connected with separator,
Separator is connected with deduster.
Preferably, drying device includes driving device, rack, casing, lifting tooth and drive shaft；Driving device and casing are set
Put in rack, the cavity of casing and rack composition drying device, driving device and driving axis connection, be provided with and raise in drive shaft
Expect tooth；Air inlet, feeding mouth and air outlet are provided with casing, feeding mouth sets position higher than the top of lifting tooth.
Preferably, the cavity of drying device is divided into the multiple chambers being divided into by striker plate, and striker plate is arranged on casing bottom
In portion or rack, after coal is dried in the chamber with thermal current, next chamber is progressively flowed to, is most discharged afterwards through discharge gate.
Preferably, the cavity of drying device is divided into multiple chambers that striker plate by being staggered and wind shield are divided into,
Striker plate is arranged in bottom of shell or rack, and wind shield is arranged on case top so that thermal current and coal are in the chamber
Move towards as S-shaped.
Preferably, coal is collected by flue gas flow direction separator and deduster, flue gas flow direction separator and deduster with efficiently
Pulverized coal bin connects；
Alternatively, being additionally provided with discharge end on casing, coal is collected by discharge end, flue gas flow direction separator and deduster, is gone out
Material end, flue gas flow direction separator and deduster are connected with high-efficiency pulverized coal storehouse.
Preferably, air blower can produce that temperature is 40-90 DEG C, wind speed is 27-38m/s and wind pressure is 700-900Pa's
Wind.
Preferably, it is 1.8-3.2 into the coal-air ratio of boiler.
Explanation of nouns：
Depolymerization：Coal is broken for short grained process by bulky grain.
Mass heat transfer：Mutual heat conduction, the process of mass change will specific to thermal current in the utility model
Heat is transmitted to coal, coal is heated up, simultaneous moisture evaporation, the process that coal is dried
The implementation of the utility model includes following technique effect：
Boiler plant provided by the utility model for lignite and jet coal need not install pulverized coal preparation system, by drying and upgrading
System is introduced into boiler coal feeding system, and by introducing the drying and upgrading system of coal, the coal after the drying and upgrading that burns can improve unit
Efficiency, reduces the power consumption of the subsidiary engines such as air-introduced machine, so as to reduce coal consumption for power generation, while can also reduce CO2、NOxDischarge.This practicality
The boiler coal feeding device structure of new offer is simple, safe for operation, versatility is good.Without using bulky pulverized coal preparation system, section
About land resource；Drying and upgrading system can be coordinated to control with boiler, and input cost is relatively low；Especially it is a cancellation powder system processed
Unite inflammable and explosive security risk.Power plant can also be made safe, economy using lignite and jet coal, lignite and jet coal are easy
Exploitation, price is generally relatively low, reduces power plant soot cost.
Coal dust after drying and upgrading can be transported to for putting the high-efficiency pulverized coal storehouse of the coal dust after drying and upgrading, then be given to
In boiler furnace.Also drying and upgrading system and boiler slitless connection without secondary transhipment, can be can effectively prevent dust to air
Pollution.Boiler reduces powder consumption rate processed, and drying and upgrading coal dust improves boiler combustion efficiency.
The utility model can complete the efficiency for burning burning, improving boiler to coal by limiting coal-air ratio.Meanwhile, it is capable to
The safety for taking into account burning stablizes burning, can also reduce NOXGeneration, reduce the pollution to environment, reduce smoke evacuation temperature
Degree reduces heat loss, by adjusting the big few of coal-air ratio, can adjust the flame kernel in burner hearth, the distance of ignition point, ensures
The safety of equipment.
The utility model also proposes drying device improvement so that the drying device dehydration rate of the utility model is more than
60%；It will not explode, workshop operation safety；Rate of drying is high, can reach 600-750kgH20/m3(every cube of h
Rice dry place can deviate from 600-750 kilograms of water per hour), which per hour can 30-80 cubes of moisture-free coal.It is dry
The water content control of coal after dry is preferable, the uniform granularity of coal, the effective quality for ensureing product after drying.The utility model
Restriction so that drying time of the coal in whole cavity it is very short, can either ensure that high dehydration rate will not be pyrolyzed coal again
(combustion reaction),
When the drying device of the utility model is used for moisture-free coal, the combustible component of coal will not volatilize or burn, can not
Reach explosion critical value, influence the calorific capacity of coal.Coal rapid draing, will not be sticky in chamber housing.
The ignition point of lignite and jet coal is less than 278 DEG C, if using existing pulverized coal preparation system, it may occur that explosion, this reality
Explosion can be solved the problems, such as with new boiler plant.
Brief description of the drawings
Fig. 1 is existing power station boiler pulverizing system structure diagram.
Fig. 2 is the boiler plant flow diagram for being used for lignite and jet coal of the utility model embodiment.
Fig. 3 is the drying device flow chart for the boiler plant that the utility model embodiment is used for lignite and jet coal.
Fig. 4 is the drying device structure diagram for the boiler plant that the utility model embodiment is used for lignite and jet coal.
Fig. 5 is the A-A cross-sectional views of Fig. 4.
Fig. 6 is the structure diagram of the drying device containing striker plate of the utility model embodiment.
Fig. 7 is the structure diagram of the drying device containing striker plate and wind shield of the utility model embodiment.
Fig. 8 is that the drying for the boiler plant that the utility model embodiment is used for lignite and jet coal puies forward device another kind flow
Figure.
Fig. 9 is the structure diagram of the drying device with thermal current discharge of the utility model embodiment.
Figure 10 is another flow diagram of the boiler plant for being used for lignite and jet coal of the utility model embodiment.
In figure：101st, boiler furnace；102nd, suction ventilator；103rd, pressure fan；104th, mill exhauster；105th, coal bunker；106th, coal-grinding
Machine；107th, tailing separator；108th, pulverized-coal collector；109th, powder cabin.
1st, driving device；2nd, rack；3rd, casing；4th, lifting tooth；5 drive shafts；6th, air inlet；7th, feeding mouth；8th, air outlet；
9th, discharge end；10th, thermal current flows to curve；11st, striker plate；12nd, wind shield.
Embodiment
The utility model is described in detail below in conjunction with embodiment and attached drawing, it should be pointed out that described
Embodiment be intended merely to facilitate understanding to the utility model, and do not play any restriction effect to it.
Embodiment 1
A kind of boiler plant for being used for lignite and jet coal is present embodiments provided, it is shown in Figure 2, including for putting
High-efficiency pulverized coal storehouse, air blower and the boiler of coal dust after drying and upgrading, air blower are connected with boiler by pipeline, air blower and pot
Pipeline between stove is connected with high-efficiency pulverized coal storehouse；Preferably, boiler plant includes drying and upgrading system, the drying and upgrading system
It is connected with high-efficiency pulverized coal storehouse.Drying and upgrading system and boiler slitless connection, without secondary transhipment, can effectively prevent dust to air
Pollution.Boiler reduces powder consumption rate processed, and drying and upgrading coal dust improves boiler combustion efficiency.It is shown in Figure 3, drying and upgrading
System includes drying device, separator and deduster, and drying device is connected with separator, and separator is connected with deduster；Referring to
Shown in Fig. 4 and Fig. 5, drying device includes driving device 1, rack 2, casing 3, lifting tooth 4 and drive shaft 5；Driving device 1 and machine
Shell 3 is arranged in rack 2, and the cavity of casing 3 and the composition drying device of rack 2, driving device 1 is connected with drive shaft 5, drive shaft
Lifting tooth 4 is provided with 5；Air inlet 6, feeding mouth 7 and air outlet 8 are provided with casing；The setting position of feeding mouth 7, which is higher than, raises
Expect the top of tooth 4.Discharge end 9 is additionally provided with casing, coal is collected by discharge end 9, flue gas flow direction separator and deduster, discharging
End 9, flue gas flow direction separator and deduster are connected with high-efficiency pulverized coal storehouse.
In the present embodiment, air blower can produce that temperature is 40-90 DEG C, wind speed is 27-38m/s and wind pressure (dynamic pressure) is
Suitable coal, can preferably be given in the burner hearth of boiler, improve the efficiency of boiler by the wind of 700-900Pa.Into boiler
Coal-air ratio is 1.8-3.2, is preferably 2.3-2.6, and coal-air ratio is the total blast volume into boiler and the ratio of total coal amount.Pass through restriction
Coal-air ratio can complete the efficiency for burning burning, improving boiler to coal.Meanwhile, it is capable to the safety for taking into account burning stablizes combustion
Burn, NO can also be reducedXGeneration, reduce the pollution to environment, reduce exhaust gas temperature and reduce heat loss, by adjusting coal-air ratio
Size, the flame kernel in burner hearth can be adjusted, the distance of ignition point, ensures the safety of equipment.
Boiler plant provided in this embodiment for lignite and jet coal need not install pulverized coal preparation system, by drying and upgrading system
System is introduced into boiler coal feeding system, and by introducing the drying and upgrading system of coal, the coal after the drying and upgrading that burns can improve unit effect
Rate, reduces the power consumption of the subsidiary engines such as air-introduced machine, so as to reduce coal consumption for power generation, while can also reduce CO2、NOxDischarge.The present embodiment
The boiler coal feeding device structure of offer is simple, safe for operation, versatility is good.Without using bulky pulverized coal preparation system, soil is saved
Ground resource；Drying and upgrading system can be coordinated to control with boiler, and input cost is relatively low；It is easy to be especially a cancellation pulverized coal preparation system
Fire explosive security risk.Power plant can also be made safe, economy using lignite and jet coal, lignite and jet coal are easily opened
Adopt, price is generally relatively low, reduces power plant soot cost.
Referring to shown in Fig. 2 to Fig. 5, the present embodiment additionally provide a kind of boiler plant to coal method, the present embodiment is with brown
Exemplified by coal, comprise the following steps：Upgrading is dried in lignite first, obtains coal dust；Lignite is dried to the method for upgrading
It is：Thermal current (flue gas) is produced with a kind of gas-heating apparatus is (common such as hot-blast stove), is 200-1500 degrees Celsius by temperature
(the present embodiment is 901 degrees Celsius), thermal current of the oxygen content less than 10% are introduced into the cavity of drying device from air inlet 6, are gone out
8 tail end of air port is equipped with air-introduced machine (not depending on going out in figure), the cavity of drying device is produced 100-6000Pa (the present embodiment is
Negative pressure 4000Pa), the flow velocity of thermal current is 8-14m/s (the present embodiment 10m/s) in cavity；Drying device feeding mouth 7
Position is set to need to be arranged on case top higher than the top of lifting tooth 4, the present embodiment.Being arranged such makes coal and thermal current and flows into
Enter cavity, it is necessary to illustrate, feeding mouth 7 and air inlet 6 can be set as shown in Figure 4, can also be by 6 He of air inlet
Feeding mouth 7 is arranged on the side of housing at the same time, is belonged to as long as lignite and thermal current can collect before being shed by lifting tooth 4
The mode of " lignite and thermal current cocurrent enter cavity " described in the present embodiment.The bottom of cavity is provided with rotating device, rotation
Device is provided with lifting tooth 4, and rotating device is driven by the drive shaft 5 of driving device 1, and rotating device and driving device are arranged on
In rack 2, casing 3 is set in rack 2, the rotating speed of rotating device is 50-500 revs/min (the present embodiment is 200 revs/min),
Lifting tooth 4 on rotating device sheds lignite so that lignite is spread in thermal current, drying time of the lignite in whole cavity
It is 1-5s (the present embodiment 5s)；Lignite is dried by thermal current and discharged with drying device after (mass heat transfer), into high-efficiency pulverized coal
Storehouse；The cold wind that air blower produces is blown into boiler furnace after converging with coal dust.
The dried granularity of coal is 0.01-15mm.Temperature at thermal current air outlet 8 is 120-200 degrees Celsius.Hot gas
Stream flows to curve 10 as shown in figure 4, the drying device of the present embodiment so that the dehydration rate for the drying device that the present embodiment is limited
Greatly improve；Do not reach explosion critical value, will not explode, workshop operation safety；Rate of drying is high.Dried coal contains
Water rate control is preferable, the uniform granularity of lignite, the effective quality for ensureing product after drying.The restriction of the present embodiment causes brown
Drying time of the coal in whole cavity is short, can either ensure that high dehydration rate will not make lignite that pyrolysis (combustion reaction) occur again,
Lignite rapid draing, will not be sticky in chamber housing.
The rotating speed of the present embodiment drive shaft can realize speed governing with frequency converter, to adjust the speed shed of the lignite in housing,
And then adjust the temperature of the thermal current in heat exchanging process and the oxygen content of inside.Also coordinate air-introduced machine in the actual production process
Wind pressure size, can improve heat exchanger effectiveness of the lignite in the chamber interior space, reduce lignite along curve movement depolymehzation process
Resistance.
Preferably, the full water of the coal dust after drying and upgrading is 12-15%, ash 18-25%, fugitive constituent 48-
55%, low heat valve is 4200-4500 kilocalories；R90For 7-45%, full water (Mt) is the general name of free moisture and inherent moisture,
That is hygroscopic water+inherent moisture.Ash is the component that can not be burnt left after coal burning.Fugitive constituent is volatilizable in coal burning
Component.The sample of low heat valve (Qnet) unit mass burns under constant volume in excessive oxygen, its combustion product group
As oxygen, nitrogen, carbon dioxide, sulfur dioxide, liberated heat when vaporous water and solid-state are grey.Fineness of pulverized coal R90 refers to
Coal dust is screened for 90 microns of sieve with a sieve aperture width, stays in the percentage of total coal dust shared by the rough coal powder above sieve
Rate.
The ignition point of lignite and jet coal is less than 278 DEG C, if using existing pulverized coal preparation system, it may occur that explosion, this reality
Explosion can be solved the problems, such as with new boiler plant.The drying and upgrading device of the present embodiment can be used in drying brown coal and length
Physical reactions will not occur for flame coal, drying process, influence the performance of coal.
The data for being used for drying brown coal using the drying device of the present embodiment are as shown in table 1：
Data after 1 embodiment of table, 1 brown coal drying
| Rate of drying | 630kgH20/m3.h |
| Lift calorific value | 2500kcal/kg |
| Dehydration rate | 74% or so |
| Lignite granularity | ≤3mm |
| Separate unit disposal ability (wet basis) per hour | 36 cubes |
Embodiment 2
The present embodiment provides a kind of for lignite and the boiler plant of jet coal, the difference with embodiment 1 is, referring to Fig. 6
Shown, the cavity of the drying device of the present embodiment is divided into the multiple chambers being divided into by striker plate 11, when lignite passes through lifting tooth
Depolymerization, which is shed, to be spread in chamber, after the lignite after depolymerization is with thermal current in the chamber dry (mass heat transfer), under progressively flowing to
One chamber, is most discharged through discharge gate afterwards.Striker plate 11 is arranged in 3 bottom of casing or rack 2.Thermal current flows to curve 10
As shown in Figure 6.The temperature of air inlet thermal current is 1000 degrees Celsius, oxygen content is less than 8%, and the negative pressure of drying device is
4500Pa, the flow velocity of thermal current is 10m/s in cavity；The rotating speed of rotating device is 200 revs/min, and lignite is in whole cavity
Drying time be 3s.Part same as Example 1, the present embodiment repeat no more.
Data after 2 embodiment of table, 2 brown coal drying
| Rate of drying | 620kgH20/m3.h |
| Lift calorific value | 2700kcal/kg |
| Dehydration rate | 76% or so |
| Lignite granularity | ≤3mm |
| Separate unit disposal ability (wet basis) per hour | 37 cubes |
Embodiment 3
The present embodiment provides a kind of for lignite and the boiler plant of jet coal, the difference with embodiment 1 is, referring to Fig. 7
Shown, the cavity of drying device is divided into multiple chambers that striker plate 11 by being staggered and wind shield 12 are divided into so that heat
Air-flow and the trend of lignite in the chamber are S-shaped, and mass heat transfer is abundant, and the thermal efficiency improves.Thermal current flows to such as Fig. 7 institutes of curve 10
Show, striker plate 11 is arranged on 3 bottom of casing, and wind shield 12 is arranged on case top.The temperature of air inlet thermal current is taken the photograph for 1200
Family name's degree, oxygen content are less than 8%, and the negative pressure of drying device is 4000Pa, and the flow velocity of thermal current is 10m/s in cavity；Rotating device
Rotating speed be 200 revs/min, drying time of the lignite in whole cavity is 3s.Part same as Example 1, this implementation
Example repeats no more.
Lower baffle divides housing 135 into multiple chambers, and granularity size and humidity could enter latter after reaching to a certain degree
A chamber, lignite that granularity is big and that humidity is big is larger due to conducting oneself with dignity, and next chamber can not be moved into company with hot-air,
Continue to fall into and shed when front chamber is raised up by the agitation realization of lifting tooth, and realize the constantly broken of lignite bulky grain, its it is broken by
Lifting tooth, lower baffle plate, particle mutually hit common realization, are finally reached discharging wind stopping device after point multiple chamber transition, ensure into
Product uniform granularity and humidity meet the requirements.
Hot-air and logistics is set to form S-shaped and move towards by upper plate washer and lower baffle, exchange efficiency is high, and energy consumption is small.
Data after 3 embodiment of table, 3 brown coal drying
| Rate of drying | 610kgH20/m3.h |
| Lift calorific value | 2600kcal/kg |
| Dehydration rate | 75% or so |
| Lignite granularity | ≤4mm |
| Separate unit disposal ability (wet basis) per hour | 36 cubes |
Embodiment 4
The present embodiment provides a kind of for lignite and the boiler plant of jet coal, the difference with embodiment 1 is, referring to Fig. 9
Shown, the cavity of drying device is divided into multiple chambers that striker plate 11 by being staggered and wind shield 12 are divided into so that heat
Air-flow and the trend of lignite in the chamber are S-shaped, and mass heat transfer is abundant, and the thermal efficiency improves.As shown in Figure 8 and Figure 9, lignite is whole
Taken away with thermal current, then collected by flue gas flow direction separator and deduster, therefore, discharge end 9 need not be set on casing,
Coal dust is directly taken away by flue gas flow direction separator and deduster, and is connected with high-efficiency pulverized coal storehouse.The temperature of air inlet thermal current
Be 900 degrees Celsius, oxygen content be less than 8%, the negative pressure of drying device is 4000Pa, and the flow velocity of thermal current is 10m/s in cavity；Rotation
The rotating speed of rotary device is 200 revs/min, and drying time of the lignite in whole cavity is 3s.
Thermal current flows to curve 10 as shown in figure 9, the present embodiment passes through the limit to parameters such as negative pressure value, temperature, oxygen content
It is fixed so that the dehydration rate for the drying device that the present embodiment is limited greatly improves；Do not reach explosion critical value, will not occur quick-fried
It is fried, workshop operation safety；Rate of drying is high.The water content control of dried coal is preferable, the uniform granularity of lignite, effectively
Ensure the quality of product after drying.The restriction of the present embodiment make it that drying time of the lignite in whole cavity is short, can either protect
Demonstrate,proving high dehydration rate will not make lignite that pyrolysis (combustion reaction) occur again, and lignite rapid draing, will not be sticky in chamber housing.
Data after 4 embodiment of table, 4 brown coal drying
| Rate of drying | 600kgH20/m3.h |
| Lift calorific value | 2500kcal/kg |
| Dehydration rate | 75% or so |
| Granularity | 3≤mm |
| Separate unit disposal ability (wet basis) per hour | 35 cubes |
Embodiment 5
It is shown in Figure 10, the boiler plant for being used for lignite and jet coal of the present embodiment, by high-efficiency pulverized coal storehouse, air blower
Formed with boiler, air blower is connected with boiler by pipeline, and the pipeline between air blower and boiler is connected with high-efficiency pulverized coal storehouse；Into
The coal-air ratio for entering boiler is 2.3-2.6, and the present embodiment realizes electricity for the coal dust after drying and upgrading is transported in high-efficiency pulverized coal storehouse
Purpose of factory's boiler without powder manufacturing apparatus.
Finally it should be noted that above example is only illustrating the technical solution of the utility model, rather than to this reality
With the limitation of novel protected scope, although being explained with reference to preferred embodiment to the utility model, this area it is general
Lead to it will be appreciated by the skilled person that can be to the technical solution of the utility model technical scheme is modified or replaced equivalently, without departing from this
The spirit and scope of utility model technical solution.
Claims (10)
- It is 1. a kind of for lignite and the boiler plant of jet coal, it is characterised in that：Including for putting the coal dust after drying and upgrading High-efficiency pulverized coal storehouse, air blower and boiler, the air blower is connected with the boiler by pipeline, the air blower and the pot Pipeline between stove is connected with the high-efficiency pulverized coal storehouse.
- It is 2. according to claim 1 a kind of for lignite and the boiler plant of jet coal, it is characterised in that：The boiler dress Put and be made of high-efficiency pulverized coal storehouse, air blower and boiler.
- It is 3. according to claim 1 a kind of for lignite and the boiler plant of jet coal, it is characterised in that：The boiler dress Put and be connected including drying and upgrading system, the drying and upgrading system with high-efficiency pulverized coal storehouse.
- It is 4. according to claim 3 a kind of for lignite and the boiler plant of jet coal, it is characterised in that：The drying carries Matter system includes drying device, separator and deduster, and the drying device is connected with the separator, the separator and institute State deduster connection.
- It is 5. according to claim 4 a kind of for lignite and the boiler plant of jet coal, it is characterised in that：The dry dress Put including driving device, rack, casing, lifting tooth and drive shaft；The driving device and the casing are arranged on the rack On, the casing and the rack form the cavity of drying device, the driving device and the driving axis connection, the driving Lifting tooth is provided with axis；Air inlet, feeding mouth and air outlet are provided with the casing, the setting position of the feeding mouth is high In the top of the lifting tooth.
- It is 6. according to claim 5 a kind of for lignite and the boiler plant of jet coal, it is characterised in that：The dry dress The cavity put is divided into the multiple chambers being divided into by striker plate, and striker plate is arranged in bottom of shell or rack, and coal is with hot gas After stream is dried in the chamber, next chamber is progressively flowed to, is most discharged afterwards through discharge gate.
- It is 7. according to claim 5 a kind of for lignite and the boiler plant of jet coal, it is characterised in that：Drying device Cavity is divided into multiple chambers that striker plate by being staggered and wind shield are divided into, and striker plate is arranged on bottom of shell or machine On frame, wind shield is arranged on case top so that thermal current and the trend of coal in the chamber are S-shaped.
- It is 8. according to claim 5 a kind of for lignite and the boiler plant of jet coal, it is characterised in that：Coal passes through flue gas Flow to separator and deduster is collected, flue gas flow direction separator and deduster are connected with high-efficiency pulverized coal storehouse；Or discharge end is additionally provided with the casing, coal is collected by discharge end, flue gas flow direction separator and deduster, discharging End, flue gas flow direction separator and deduster are connected with high-efficiency pulverized coal storehouse.
- 9. according to a kind of any boiler plants for being used for lignite and jet coal of claim 1-8, it is characterised in that：It is described Air blower can produce the wind that temperature is 40-90 DEG C, wind speed is 27-38m/s and wind pressure is 700-900Pa.
- 10. according to a kind of any boiler plants for being used for lignite and jet coal of claim 1-8, it is characterised in that：Into The coal-air ratio for entering boiler is 1.8-3.2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721178709.6U CN207350357U (en) | 2017-09-14 | 2017-09-14 | A kind of boiler plant for being used for lignite and jet coal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721178709.6U CN207350357U (en) | 2017-09-14 | 2017-09-14 | A kind of boiler plant for being used for lignite and jet coal |
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| Publication Number | Publication Date |
|---|---|
| CN207350357U true CN207350357U (en) | 2018-05-11 |
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| CN201721178709.6U Active CN207350357U (en) | 2017-09-14 | 2017-09-14 | A kind of boiler plant for being used for lignite and jet coal |
Country Status (1)
| Country | Link |
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| CN (1) | CN207350357U (en) |
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2017
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenmu Zhongding Energy Technology Development Co.,Ltd. Assignor: YUNNAN ZHONGYI DINGDONG ENERGY TECHNOLOGY DEVELOPMENT Co.,Ltd. Contract record no.: X2024980002445 Denomination of utility model: A boiler device for brown coal and long flame coal Granted publication date: 20180511 License type: Common License Record date: 20240304 |
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