CN209064821U - Thermal power plant lignite storage organization - Google Patents
Thermal power plant lignite storage organization Download PDFInfo
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- CN209064821U CN209064821U CN201821849929.1U CN201821849929U CN209064821U CN 209064821 U CN209064821 U CN 209064821U CN 201821849929 U CN201821849929 U CN 201821849929U CN 209064821 U CN209064821 U CN 209064821U
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Abstract
The utility model discloses a kind of thermal power plant lignite storage organization and storage technology, including stack-up-yard ground main body, be formed as lignite build-up areas in the middle part of main body to stack-up-yard；Drain assembly is with being formed in stack-up-yard at main body, and ponding of the drain assembly to drain the dump bottom being piled up at the lignite build-up areas；Sewage treatment component, Sewage treatment component is with being formed in the stack-up-yard near main body, and Sewage treatment component and the drain assembly communicatively receive the ponding of the drain assembly drainage；The stack-up-yard of the utility model main body be integrated with drain assembly, the ponding of dump bottom is drained in drain assembly using drain assembly, and using the Sewage treatment component recycling near dump and store waste water, with waste water by purifying, except secondary use after Slag treatment, resource has been saved, while there is good drainage effect, and has formed the hollow closed conduit of water storage in dump bottom, it can reduce dump temperature, can be avoided spontaneous combustion after having completely cut off air.
Description
Technical field
The utility model relates to thermal power plant/steam power plant's lignite storage technical field of operation more particularly to a kind of firepower
Power plant lignite storage organization.
Background technique
Thermal power plant/steam power plant is the engineering for utilizing burning fuel to generate thermal energy, and other being needed with energy equipment heat supply
Unit.And lignite is the most common fuel in thermal power plant, i.e., thermal power plant will be after lignite full combustion using combustion apparatus
Thermal energy is obtained, and need energy equipment is transferred thermal energy to by heat-transfer equipment, therefore, burning is a main work in thermal power plant
Skill.
For thermal power plant, due to needing a large amount of lignite, (lignite is that most thermal power plants are the most at this stage
Main fuel), therefore, it is necessary to consider the transport and storage problem of lignite, wherein transportation problem relies primarily on transport and sets
It is standby, such as large truck, train, and most allow thermal power plant staff's headache be lignite storage problem.
When needing to consider lignite storage in the prior art whether can it is wet by rainwater and in dry conditions lignite whether
The problem of meeting spontaneous combustion.And if lignite is moistened by rainwater, it will reduce combustion rate, improve burning time, to improve power generation
Cost；And if lignite completely be dehydrated, by process means by its be in be completely dried in the environment of, once temperature increase, it is brown
Coal just has the problem of spontaneous combustion, and there are security risks, and it is serious when will cause power plant resources loss.
The mode majority of lignite storage is accumulation deposit in the prior art, and conventional accumulation mode majority is first processing heap
Product place, it is ensured that do not have pollution and extra moisture in place, it is ensured that meet accumulation and require.Then it after lignite accumulation, utilizes
Tarpaulin covers dump, avoids the dump in rainwater weather from contacting excessive water, it is ensured that dry environment；And simultaneously, the prior art
In lignite accumulation rear defence spontaneous combustion main means be exactly to divulge information, it is ensured that a degree of ventilation, it will be able to suitably reduction dump
Temperature guarantees that temperature is in autoignition temperature always hereinafter, still, treatment process at this stage obviously belongs to bulk processing, and accumulates
Mode be also the not art of composition random accumulation, on the one hand waterproof mentioned above and anti-spontaneous combustion effect are bad, mainly dump
Moisture is contained in inside, this partial moisture has no idea to be discharged, and causing finally can be in the bottom ponding of dump, for a long time, dump
It is always maintained at wet state, is unfavorable for after burning；On the other hand, the random accumulation of the art of composition will not will lead to dump heap
Product rear stability is poor, is easy to appear collapsing or topples over, can jeopardize the personal safety of operating personnel around when serious.
Utility model content
That the purpose of the utility model is to provide a kind of packed structures is novel, has drain function, is sharp again with Sewage treatment
With the thermal power plant lignite storage organization of function.
To achieve the goals above, the utility model provides the following technical solutions:
The thermal power plant lignite storage organization of the utility model, comprising:
Stack-up-yard ground main body, the stack-up-yard main body be concrete foundation structure, the stack-up-yard main body middle part
Be formed as lignite build-up areas；
Drain assembly, the drain assembly is with being formed in the stack-up-yard at main body, and the drain assembly is to drain
It is piled up in the ponding of the dump bottom at the lignite build-up areas；
Sewage treatment component, the Sewage treatment component is with being formed in the stack-up-yard near main body, and the waste water returns
It receives component and the drain assembly communicatively receives the ponding of the drain assembly drainage；
The dump for the lignite accumulated at the lignite build-up areas is in terrace with edge structure；
The dump for the lignite accumulated at the lignite build-up areas is to be divided into structure, and the dump of lignite is along the dump
Vertical direction segmentation is seperated in multiple contour dumps.
Further, the stack-up-yard main body section be quadrilateral structure, and the lignite build-up areas be formed
In the stack-up-yard the quadrilateral area at main center；
The dump for being piled up in the lignite build-up areas is in square terrace with edge structure.
Further, the drain assembly includes the open channel of with being formed in the stack-up-yard three side of main body, at least described
Stack-up-yard the lignite build-up areas of main body be formed to have the face of slope of first gradient, and described with first gradient inclines
Slope inclined direction is towards any open channel；
The edge of the open channel and the face of slope is connected with the first pipe of drainage dump bottom ponding；
The drain assembly further includes the hollow closed conduit for being formed in lignite build-up areas lower part；
The hollow closed conduit communicatively receives the ponding of the open channel drainage by second pipe and any open channel.
Further, the surface of the hollow closed conduit is formed with the second slope surface, and the second slope surface court of the hollow closed conduit
To the hollow closed conduit an overturning angle be formed as water reserve.
Further, the Sewage treatment component is the water reserve side for being formed in the hollow closed conduit, and the waste water
Recycling component is the water collecting sump being connected to by third pipeline with the hollow closed conduit.
Further, the height of the dump is 8m, and the height of every layer of dump fission is 0.5m；
It is bound by coal slime the upper surface of the fission of dump described in top layer；
The coal slime with a thickness of 0.5m.
Further, the dump is covered by tarpaulin.
In the above-mentioned technical solutions, lignite storage organization in thermal power plant provided by the utility model has beneficial below
Effect:
1, the stack-up-yard of the utility model main body be integrated with drain assembly, using drain assembly by the ponding of dump bottom
It is drained in drain assembly, and using the Sewage treatment component recycling near dump and stores waste water, band waste water passes through purification, removes
Secondary use after Slag treatment has saved resource, while having good drainage effect, avoids dump large area wet, to mention
Combustion rate when high lignite uses；
2, the lignite build-up areas of the utility model is designed to face of slope, can be conducive to the row of dump bottom ponding
Out, it is ensured that drainage effect is good；
3, the dump accumulation mode of the utility model improves, and is accumulated in the form of layer, every layer of dump fission
All by process, the dump stability after guaranteeing accumulation is good, and more tight, reduces inner air amount, reduces certainly
The generation of combustion；
4, the dump lower part of the utility model is integrated with hollow closed conduit, and trickling has waste water, the temperature of waste water in hollow closed conduit
Lower, therefore, hollow closed conduit, which can realize dump, to cool down, to further avoid its spontaneous combustion.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only to record in the utility model
Some embodiments be also possible to obtain other drawings based on these drawings for those of ordinary skill in the art.
Fig. 1 is the lignite accumulation of lignite storage organization in thermal power plant provided by the embodiment of the utility model and storage technology
Structural schematic diagram afterwards；
Fig. 2 is each structures of lignite storage organization in thermal power plant provided by the embodiment of the utility model and storage technology
Layout drawing；
Fig. 3 is the lignite accumulation of lignite storage organization in thermal power plant provided by the embodiment of the utility model and storage technology
The cross-sectional view in region.
Description of symbols:
1, stack-up-yard ground main body；2, dump；
101, lignite build-up areas；102, the first slope surface；
201, dump is seperated；202, coal slime；
301, open channel；302, hollow closed conduit；303, water collecting sump；304, first pipe；305, second pipe；306, third pipe
Road；307, water reserve.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with attached drawing pair
The utility model is further detailed.
Referring to shown in Fig. 1 to Fig. 3；
The thermal power plant lignite storage organization of the utility model, comprising:
Stack-up-yard ground main body 1, stack-up-yard main body 1 be concrete foundation structure, stack-up-yard the middle part of main body 1 be formed as
Lignite build-up areas 101；
Drain assembly, drain assembly is with being formed in stack-up-yard at main body 1, and drain assembly is piled up in lignite heap to drain
The ponding of 2 bottom of dump at product region 101；
Sewage treatment component, Sewage treatment component is with being formed in stack-up-yard near main body 1, and Sewage treatment component and draining
Component communicatively receives the ponding of drain assembly drainage；
The dump 2 for the lignite accumulated at lignite build-up areas 101 is in terrace with edge structure；
The dump 2 for the lignite accumulated at lignite build-up areas 101 is to be divided into structure, and the dump 2 of lignite is along the perpendicular of dump 2
Histogram is to segmentation in multiple contour dump fissions 201.
Specifically, present embodiment discloses a kind of thermal power plant/steam power plants to accumulate brown coal texture, firstly, firepower is sent out
Power plant mainly utilizes combusting brown coal to obtain thermal energy, to be used using the partial heat energy for generating equipment；Therefore, firepower is sent out
For power plant, the demand of lignite be it is huge, therefore, the storage problem of lignite is main direction of studying.The present embodiment design
Lignite storage organization by stack-up-yard based on main body 1, the stack-up-yard main body 1 built by concrete, and at this
Reserve to stack-up-yard the lignite build-up areas 101 to accumulate lignite in the middle part of main body 1, it, will in strict accordance with institute subregion when construction
Lignite is gradually accumulated in lignite build-up areas 101.In addition, lignite surface can remain portion of water, which may
It is the moisture for being attached to lignite surface due to generations such as rainwash in transportational process or steam condensations, in heap
This partial moisture of lignite can flow downward along the gap between lignite after product, until flowing to lignite bottom, and in lignite coal
Ponding is formed on the bottom of heap 2.And the part ponding can allow dump 2 all to become wet, shadow over time once not thoroughly removing
It rings to later period brown burning of coal and uses, therefore, it is necessary to remove the ponding of 2 bottom of dump；The present embodiment in stack-up-yard main body 1 week
It encloses and devises drain assembly by way of excavation, and devised in the output end of drain assembly by the construction means excavated
Sewage treatment component is received and is drained by drain assembly the ponding of 2 bottom of dump, and the part ponding is drained to waste water and is returned
Receipts component, the effectively delay of less 2 bottom ponding of dump, meanwhile, the waste water of recycling is after purified treatment or except Slag treatment
Can secondary use, such as water tower moisturizing or be place washing and cleaning operation.2 bottom of dump is handled in this way
Ponding can economize on resources, and be conducive to the Sustainable Growth of enterprise.
Preferably, in the present embodiment stack-up-yard the section of main body 1 be quadrilateral structure, and lignite build-up areas 101 is
With the being formed in stack-up-yard quadrilateral area at 1 center of main body；
The dump 2 for being piled up in lignite build-up areas 101 is in square terrace with edge structure.
The structure of the present embodiment with specifically describing stack-up-yard main body 1, lignite build-up areas 101 and dump 2, with reality
For size used by border: above-mentioned stack-up-yard 1 section of main body be in 180mX200m quadrilateral structure, and reserve in accumulation
The lignite build-up areas 101 at 1 center of place main body needs to reserve certain space in surrounding, therefore, can be by lignite accumulation area
Domain 101 suitably reduces a circle, is dimensioned to 140mX180m.The above is only the rule of size used by thermal power plant in reality
Lattice, but not limitation and above-mentioned size and specification.In addition, the accumulation mode of the dump 2 of the present embodiment also has very with the prior art
Big difference is in terrace with edge structure after lignite accumulation, due to the present embodiment stack-up-yard main body 1 and lignite build-up areas 101 all
It is quadrilateral structure, therefore, also in square terrace with edge structure, i.e. the horizontal cross-section of dump 2 is square dump 2 made of accumulation, and
The vertical section or angled section of dump 2 are trapezium structure, meanwhile, according to above-described embodiment it can be concluded that, the present embodiment
The accumulation mode of dump 2 in a layered fashion, that is, devises multilayer dump fission 201, successively accumulates from the bottom to top and do surface
Processing, 2 internal voids of dump after accumulation are smaller while also having good structural stability.
Preferably, in the present embodiment drain assembly include with being formed in stack-up-yard 1 three side of main body open channel 301, at least
Stack-up-yard the lignite build-up areas 101 of main body 1 be formed to have the face of slope of first gradient 102, and there is first gradient
102 face of slope inclined direction is towards any open channel 301；
The edge of open channel 301 and face of slope is connected with the first pipe 304 of drainage 2 bottom ponding of dump；
Drain assembly further includes the hollow closed conduit 302 for being formed in 101 lower part of lignite build-up areas；
Hollow closed conduit 302 communicatively receives the ponding of the drainage of open channel 301 by second pipe 305 and any open channel 301.
Specifically, the present embodiment specifically discloses the structure and principle of drain assembly, for the scene of thermal power plant, most
Be concrete structure and soil texture for common constructing structure, therefore, the stack-up-yard of above-described embodiment introduction main body 1 with mixed
Built based on solidifying soil, and for the drain assembly of the present embodiment comprising open channel 301 and hollow closed conduit 302
All formed with the construction means of excavation, for practical accumulation experience, general stack-up-yard main body 1 be all formed at by near field
At destination edge or be in the spacious paulin temporarily built, therefore, dump 2 have side need against/close to wall, the wall
Body is without processing, and 301 Fen Wei tri- of open channel of the present embodiment, i.e., except the one side close to wall, excess-three side is required
In stack-up-yard the side of main body 1 is excavated, and three open channels 301 are between each other connected state, since above-described embodiment describes
Lignite build-up areas 101 is formed with towards inclined first slope surface 102 of one side, and when ponding is arranged at 2 bottom of dump, ponding can be along the
The open channel 301 of the trickling of one slope surface 102, the present embodiment is connected to ponding trickling using power-equipment (pump) connection first pipe 304
Terminal, gradually the ponding of accumulation can be drained in open channel 301, meanwhile, under the lignite build-up areas 101 of the present embodiment
Portion is formed with hollow closed conduit 302, which is connected to by second pipe 305 with open channel 301, will receive in open channel 301
Ponding and rainwater be drained in hollow closed conduit 302, carry out subsequent processing.
It is furthermore preferred that in order to ensure in hollow closed conduit 302 received ponding can go on smoothly subsequent drainage and
It discharges, the surface of the hollow closed conduit 302 in the present embodiment is formed with the second slope surface (not shown), and the second of hollow closed conduit 302
Slope surface towards hollow closed conduit 302 an overturning angle be formed as water reserve 307.Wherein, above-mentioned Sewage treatment component is to be formed
In 307 side of the water reserve of hollow closed conduit 302, and Sewage treatment component is to be connected to by third pipeline 306 with hollow closed conduit 302
Water collecting sump 303.
The second slope surface is formed in the hollow closed conduit 302 of hollow structure, while can be by product by the gradient of second slope surface
Water is drained to one jiao of hollow closed conduit 302, which is formed as water reserve 307, which can enter hollow for all
Closed conduit 302 is drained to the water reserve 307, in addition, Sewage treatment component has also been devised in the present embodiment, which is to open
The water collecting sump 303 in side is dug, using power-equipment and third pipeline 306, the water of water reserve 307 is emitted into water collecting sump
303 collect for use.
Preferably, the height of dump 2 is 8m in the present embodiment, and the height of every layer of dump fission 201 is 0.5m；
It is bound by coal slime 202 upper surface of top layer's dump fission 201；
Coal slime 202 with a thickness of 0.5m.
Since 101 lower part of lignite build-up areas of the present embodiment is excavated with hollow closed conduit 302, although the accumulation of the present embodiment
Place main body 1 is built with concrete, and with good structural stability, still, it is dark that hollow has been excavated in its underpart
Canal 302, hollow closed conduit 302 need according to design requirement to design specification and size, it is ensured that upper layer stack-up-yard ground main body 1 after excavation
Stability remains unchanged, and obtains by practice, with stack-up-yard in above-described embodiment the size and specification of main body 1, the present embodiment
2 piling height of dump be up to 8m, meanwhile, the seperated 201 every layer heights of the dump of layering in 0.5m, meanwhile, top layer utilizes
Coal slime 202 binds.
Finally, the dump 2 after envelope pile is covered by tarpaulin, enter dump 2 to avoid rainwater.
Embodiment two:
Lignite storage technology in thermal power plant disclosed by the utility model, includes the following steps:
S1, lignite transport, lignite are transported stand-by near to stack-up-yard main body 1 by means of transport；
S2, stack-up-yard main body 1 build and clear up, stack-up-yard main body 1 built by concrete, and according to technique
It is required that with processing stack-up-yard the first slope surface 102 of the lignite build-up areas 101 at the middle part of main body 1；
S3, lignite accumulate operation, require according to technique, successively accumulate dump fission 201 from the bottom to top, have accumulated one layer of coal
After heap fission 201, seperated 201 surfaces of mechanical processing dump are surface-treated using dump, then carry out one layer of dump fission 201
Accumulation；
S4, Feng Duo are bound after the completion of lignite accumulation using 0.5m thickness coal slime 202；
S5, covering after 202 envelope pile of coal slime, cover tarpaulin on 2 surface of dump.
Further, in the step S3, the surface treatment of dump 2 includes:
Seperated 201 surfaces of dump are shakeout first with coal pusher, secondly, being compacted dump fission 201 using road roller.
The packed structures of the lignite of layer and the knot using the accumulation are capable of forming as disclosed in the present embodiment
Structure convenient for discharge 2 bottom of dump ponding, meanwhile, in conjunction with above-described embodiment, the present embodiment specifically describe in construction by
The construction method accumulated according to the mode of the layer of the present embodiment, it is necessary first to be required to build specification satisfaction according to practice of construction
It is required that stack-up-yard ground main body 1, then according to the stack-up-yard put up main body 1 divides lignite build-up areas 101, when division,
Need the integral thickness of in view of 302 structure of hollow closed conduit of lower part hollow out and stack-up-yard main body 1, it is contemplated that after accumulation
Dump 2 has very big pressure, the active force with acting on stack-up-yard after main body 1 whether can compression failure basis, these require through
Cross technique measuring and calculating, it is ensured that safety and stability.With handling stack-up-yard well after main body 1, transport to the lignite at this is layered heap
Then product is all bulldozed surface using coal pusher after every layer of 201 accumulation of dump fission at lignite build-up areas 101, and utilize pressure
The compacting of road machine, meanwhile, above-mentioned steps can be by repeatedly carrying out, i.e., if the dump that have passed through after shakeouing and being compacted still can not
Meet construction requirement, then can carry out it is secondary be bulldozed and be compacted, and so on.After processing, 202 envelope pile of coal slime is finally utilized,
Last covered tarpaulin, meanwhile, the present embodiment has selected tarpaulin to be covered, and the tarpaulin of the present embodiment can select one
Cutter has the material substitution of hydrophobic property, and details are not described herein again.
In the above-mentioned technical solutions, thermal power plant lignite storage organization and storage technology provided by the utility model, tool
Have it is following the utility model has the advantages that
The stack-up-yard of the utility model main body 1 be integrated with drain assembly, using drain assembly by the ponding of 2 bottom of dump
Be drained in drain assembly, and using near dump 2 the recycling of Sewage treatment component and storage waste water, band waste water by purification,
Except secondary use after Slag treatment, resource has been saved, while there is good drainage effect, has avoided dump large area wet, thus
Improve combustion rate when lignite uses；
The lignite build-up areas 101 of the utility model is designed to face of slope, can be conducive to the row of 2 bottom ponding of dump
Out, it is ensured that drainage effect is good；
2 accumulation mode of dump of the utility model improves, and is accumulated in the form of layer, every layer of dump fission
201 all pass through process, and 2 stability of dump after guaranteeing accumulation is good, and more tight, reduce inner air amount, reduce
The generation of spontaneous combustion.
The dump lower part of the utility model is integrated with hollow closed conduit, and trickling has waste water in hollow closed conduit, the temperature of waste water compared with
Low, therefore, hollow closed conduit, which can realize dump, to cool down, to further avoid its spontaneous combustion.
It is above that certain exemplary embodiments of the utility model are only described by way of explanation, undoubtedly, for
Those skilled in the art can be with a variety of different without departing from the spirit and scope of the utility model
Mode is modified described embodiment.Therefore, above-mentioned attached drawing and description are regarded as illustrative in nature, and should not be construed as
Limitation to the utility model claims protection scope.
Claims (7)
1. thermal power plant lignite storage organization characterized by comprising
Stack-up-yard ground main body (1), the stack-up-yard main body (1) be concrete foundation structure, stack-up-yard ground main body (1)
Middle part is formed as lignite build-up areas (101)；
Drain assembly, the drain assembly is with being formed in the stack-up-yard at main body (1), and the drain assembly is to drain heap
The ponding of dump bottom of the product at the lignite build-up areas (101)；
Sewage treatment component, the Sewage treatment component is with being formed in the stack-up-yard near main body (1), and the Sewage treatment
Component and the drain assembly communicatively receive the ponding of the drain assembly drainage；
The dump (2) for the lignite accumulated at the lignite build-up areas (101) is in terrace with edge structure；
The dump (2) for the lignite accumulated at the lignite build-up areas (101) is to be divided into structure, and the dump (2) of lignite is along institute
The vertical direction segmentation for stating dump (2) is seperated (201) in multiple contour dumps.
2. lignite storage organization in thermal power plant according to claim 1, which is characterized in that stack-up-yard ground main body
(1) section is quadrilateral structure, and the lignite build-up areas (101) is with being formed in stack-up-yard main body (1) center
The quadrilateral area at place；
The dump for being piled up in the lignite build-up areas (101) is in square terrace with edge structure.
3. lignite storage organization in thermal power plant according to claim 2, which is characterized in that the drain assembly includes shape
Stack-up-yard described in Cheng Yu (1) three side of main body open channel (301), at least described stack-up-yard main body (1) lignite accumulation area
Domain (101) is formed to have the face of slope of first gradient (102), and the face of slope with first gradient (102) inclines
Tilted direction is towards any open channel (301)；
The edge of the open channel (301) and the face of slope is connected with the first pipe of drainage dump (2) bottom ponding
(304)；
The drain assembly further includes the hollow closed conduit (302) for being formed in lignite build-up areas (101) lower part；
The hollow closed conduit (302) communicatively receives the open channel by second pipe (305) and any open channel (301)
(301) ponding drained.
4. lignite storage organization in thermal power plant according to claim 3, which is characterized in that the hollow closed conduit (302)
Surface be formed with the second slope surface, and the second slope surface of the hollow closed conduit (302) is towards one jiao of the hollow closed conduit (302)
It is formed obliquely as water reserve (307).
5. lignite storage organization in thermal power plant according to claim 4, which is characterized in that the Sewage treatment component is
It is formed in water reserve (307) side of the hollow closed conduit (302), and the Sewage treatment component is to pass through third pipeline
(306) water collecting sump (303) being connected to the hollow closed conduit (302).
6. lignite storage organization in thermal power plant according to claim 1, which is characterized in that the height of the dump (2)
For 8m, the height of every layer of dump seperated (201) is 0.5m；
It is bound by coal slime (202) upper surface of the fission of dump described in top layer (201)；
The coal slime (202) with a thickness of 0.5m.
7. lignite storage organization in thermal power plant according to any one of claim 1 to 6, which is characterized in that the coal
Heap (2) is covered by tarpaulin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821849929.1U CN209064821U (en) | 2018-11-09 | 2018-11-09 | Thermal power plant lignite storage organization |
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| CN201821849929.1U CN209064821U (en) | 2018-11-09 | 2018-11-09 | Thermal power plant lignite storage organization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109292348A (en) * | 2018-11-09 | 2019-02-01 | 大唐辽源发电厂 | Thermal power plant lignite storage organization and storage technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109292348A (en) * | 2018-11-09 | 2019-02-01 | 大唐辽源发电厂 | Thermal power plant lignite storage organization and storage technology |
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