CN206890551U - A kind of lignite burning utilizes system - Google Patents
A kind of lignite burning utilizes system Download PDFInfo
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- CN206890551U CN206890551U CN201720437439.XU CN201720437439U CN206890551U CN 206890551 U CN206890551 U CN 206890551U CN 201720437439 U CN201720437439 U CN 201720437439U CN 206890551 U CN206890551 U CN 206890551U
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- coal
- lignite
- lack
- gas
- coal dust
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- 239000003077 lignite Substances 0.000 title claims abstract description 77
- 239000007789 gas Substances 0.000 claims abstract description 68
- 239000003245 coal Substances 0.000 claims abstract description 55
- 239000002817 coal dust Substances 0.000 claims abstract description 53
- 238000001035 drying Methods 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003546 flue gas Substances 0.000 claims abstract description 25
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002274 desiccant Substances 0.000 claims abstract description 7
- 239000000779 smoke Substances 0.000 claims description 30
- 235000019504 cigarettes Nutrition 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 abstract description 3
- 230000018044 dehydration Effects 0.000 abstract description 2
- 238000006297 dehydration reaction Methods 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 18
- 239000000446 fuel Substances 0.000 description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Drying Of Solid Materials (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
Coal field of thermal power is the utility model is related to, in particular it relates to which a kind of burning of lignite utilizes system.In the system, the desiccant inlet of the drying device (4) connects with the high temperature furnace mouth (14), by being separated by dry coal into the coal dust disconnecting gear for the drying device (4) discharge, the coal dust isolated is burnt into the main burner (11), the lack of gas containing coal dust isolated, which enter in the coal collector (9), further to be separated, the coal dust isolated, which enters in the secondary burner (10), to be burnt, the lack of gas isolated enter the UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit (19) is handled.Lignite of the present utility model burning using system can lignite high temperature flue gas drying, powder processed, dehydration, burning be combined, after the moisture in reclaiming lack of gas, boiler is come back to, really realizes pulverizing process zero-emission, there is water saving, energy-conservation, function economical and environmentally friendly.
Description
Technical field
Coal field of thermal power is the utility model is related to, in particular it relates to which a kind of burning of lignite utilizes system.
Background technology
At present, because lignite resource is relatively abundanter, reserves are larger, and cost is relatively low, in the electricity generation system of thermal power generation
Generally use lignite is generated electricity as fuel.The explored lignite reserves in China are about 200,000,000,000 tons, and most lignite
Northeastern Inner Mongolia area is distributed in, accounts for the 3/4 of national lignite reserves.But (water content is about for lignite generally existing moisture height
For 30%-60%), burning-point it is low and the shortcomings of CO2 emissions are big, be directly used in combustion power generation can cause generating efficiency compared with
Low, environmental pollution is larger, but also can increase the equipment construction and operating cost of power plant, and the higher water content of lignite can also
Cause the increase of freight, therefore limit application of the lignite in power field.
Because lignite water content itself is higher, the thermal efficiency that lignite directly burns in the boiler is relatively low, causes the row of boiler
Cigarette loss is larger, and CO2Discharge capacity is larger.In addition, the thermal efficiency that lignite directly burns is relatively low so that boiler, fuel pulverizing plant, each
The size of individual pipeline is all larger, involves great expense, and other auxiliary equipment capacity are also larger, cause power consumption rate higher.
For the lignite of water content higher (such as more than more than 50%), the predrying technology of lignite can be used, by lignite
After water content is reduced to, then lignite is transported in boiler and is burnt and is generated electricity, although utilizing low-grade heat source from principle
Utilization of being burnt again after first drying can improve the utilization ratio of lignite, but brown coal drying system investment is universal high, while can also band
The problems such as coming dust, wastewater treatment.External high water content brown coal carries out burning profit using conventional pulverized-coal boiler configuration blower mill
With, but high water content brown coal is directly entered boiler combustion, and boiler efficiency is low.
Utility model content
The purpose of this utility model is to overcome above mentioned problem existing for prior art, there is provided a kind of lignite burning utilizes
System.Lignite of the present utility model burning using system can lignite high temperature flue gas drying, powder processed, dehydration, burning be combined,
After reclaiming the moisture in lack of gas, boiler is come back to, really realizes pulverizing process zero-emission, there is water saving, energy-conservation, economy and ring
The function of guarantor.
To achieve these goals, the utility model provides a kind of lignite burning and utilizes system, wherein, the system includes
Drying device, coal dust disconnecting gear, coal collector, UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit and boiler, the boiler have main burning
Device, secondary burner and high temperature furnace mouth, wherein, the desiccant inlet of the drying device connects with the high temperature furnace mouth,
Separated by what the drying device was discharged by dry coal into the coal dust disconnecting gear, separated and filled by the coal dust
The coal dust isolated is put to be burnt into the main burner, by the coal dust disconnecting gear isolate containing the weary of coal dust
Gas, which enters in the coal collector, further to be separated, and the coal dust isolated by the coal collector enters the second-time burning
Burnt in device, the lack of gas isolated enter the UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit is handled.
Preferably, the coal dust disconnecting gear include be sequentially connected blower mill, mill separator, powder pipeline processed and
Pulverized-coal collector, the entrance of the blower mill are connected with the outlet of the drying device, the lack of gas of the pulverized-coal collector
Outlet is connected with the entrance of the coal collector.
Preferably, the inside of the boiler and exit is provided with air preheater, the outlet of the boiler is successively
Connect deduster, desulfurizer and chimney.
Preferably, the lignite burning also includes flue gas mixing-chamber using system, and the flue gas mixing-chamber is provided with high temperature furnace
Cigarette entrance, low-temperature furnace smoke entrance and the outlet of holding furnace cigarette, the high-temperature flue gas entrance is connected with the high temperature furnace mouth, described low
Warm stove cigarette entrance by low-temperature furnace smoke pipeline be connected to the upstream line of the deduster, the downstream line of the desulfurizer or
On smoke discharging pipe between deduster described in person and the desulfurizer, holding furnace cigarette outlet by holding furnace smoke pipeline with
The desiccant inlet of the drying device is connected.
Preferably, heat exchange pipeline is provided with the UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit, the heat exchange pipeline is used for heat exchanger tube
By the water vapor condensation Cheng Shui in the lack of gas in UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit, the UTILIZATION OF VESIDUAL HEAT IN while water in road heats
And the outlet of dehydrating unit is connected to apparatus for recovering and lack of gas pipeline.
Preferably, the lignite burning also includes hot air duct using system, and the upstream of the hot air duct flows through the sky
Air preheater, the downstream of the hot air duct are divided into one or more in following three tributaries：First tributary and the master
Burner communicates, and Article 2 tributary communicates with the secondary burner, and Article 3 tributary is incorporated to the lack of gas pipeline.
Preferably, the downstream of the hot air duct is divided into three tributaries.
Preferably, the lignite burning also includes wind powder mixing chamber using system, and the wind powder mixing chamber is provided with coal dust and entered
Mouth, lack of gas entrance and material outlet, the coal powder entrance are connected with the discharge of the pulverized-coal collector, the lack of gas entrance
The lack of gas pipeline is connected, the material outlet is connected with the main burner.
Preferably, it is additionally provided with secondary air box between the hot air duct and the main burner.
Preferably, the lignite entrance upstream direction of the drying device is connected with feeder, automatic weighing device in turn
And run coal bin.
Pass through above-mentioned technical proposal, lignite burning of the present utility model provide a kind of high water content brown coal using system and burnt
The new paragon utilized, lignite efficiency power generation can be both realized, and can reclaims the moisture in lignite, and whole system cost of investment is moderate,
Preferably technical indicator and economic indicator are taken into account.On the one hand the utility model by extracting furnace smoke drying high water content brown coal, is done
Coal dust and lack of gas are separated after dry, coal dust directly enters hearth combustion by main burner, and the coal dust that lack of gas carry passes through dedusting
After collection, hearth combustion is sprayed into from main burner top as secondary fuel；On the other hand the heat energy in recovery lack of gas, improves energy
Source utilization ratio, reclaimed after water recovery in lack of gas, both reduce gross coal consumption rate, and saving water resource.It is of the present utility model new
Clever part also resides in, and dried lignite uses transporting pulverized coal with exhaust gas, and blow-through mode enters boiler combustion, that is, passes through coal dust and lack of gas point
After the link such as heat and Water Sproading in, lack of gas, lack of gas come back to boiler, and the coal dust that deduster is collected is on main burner
Portion is sent into, and is formed fuel-staged combustion, is advantageously reduced discharged nitrous oxides.This patent can be applied to China Inner Mongol, Xinjiang etc.
The area that lignite resource is concentrated, water resource lacks, can bring economic benefit, and the also improvement to local environment has positive
Meaning.
To sum up, lignite thermal power generation of the present utility model and the advantage of water reclamation system compared with prior art at least exist
In：
(1) it is adapted to the lignite of different in moisture difference calorific value；
(2) hearth combustion is sent the fine powder in coal collector as secondary fuel into, both improves fuel availability, again
Reduce the generation of burner hearth nitrogen oxides；
(3) drier is made using high-temperature flue gas and low-temperature furnace smoke, oxygen content is low, pulverized coal preparation system safety；
(4) use lack of gas blow-through powder feeding, avoid coal dust storage, conveying in be likely to occur spontaneous combustion the problems such as；
(5) lack of gas are sent back to burner hearth, avoids directly pollution of the discharge to environment, realize pulverized coal preparation system zero-emission；
(6) appropriate hot blast is added in lack of gas, improves wind powder temperature, improves the flammability of fuel, boiler at low load
Combustion stability strengthens, while ensures there is enough oxygen during boiler combustion；
(7) 90% moisture in lignite can not enter burner hearth, and boiler efficiency improves, with Hulunbeier area moisture
Exemplified by 33.4% lignite, boiler efficiency can bring up to more than 93.5% from 91.5, simultaneously as exhaust gas volumn substantially reduces, pot
Stove and auxiliary equipment capacity and power of motor reduce, and can save initial cost and operating cost；
(8) the system can realize in lignite 90% moisture recovery, using Hulunbeier area 2*600MW lignite-fired unit as
Example, the total moisture of lignite is 33.4%, and annual recyclable more than 1,000,000 tons water resources, this is lacked in the rich coal such as Xinjiang of China, Inner Mongol
Water area is significant；
(9) power plant's water system is sent into after residual heat using device can heat cooling water, can be used for heating cooling water use
In heat supply, by energy recovery, full factory's integrated heat efficiency is improved, there is significant economic benefit.
Brief description of the drawings
Fig. 1 is according to a kind of a kind of lignite thermal power generation of embodiment of the utility model and water reclamation system.
Description of reference numerals
1- run coal bins；2-automatic weighing device；3-feeder；4-drying device；5-blower mill；6- coarse powder point
From device；7-powder pipeline processed；8-pulverized-coal collector；9-coal collector；10-secondary burner；11-main burner；12—
Secondary air box；13-hot air duct；14-high temperature furnace mouth；15-boiler；16-flue gas mixing-chamber；17-mixing stove pipe
Road；18-excessive fan；19-UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit；20-heat exchange pipeline；21-apparatus for recovering；22-low temperature oven
Smoke pipeline；23-low-temperature furnace smoke blower fan；24-air preheater；25-deduster；26-lack of gas pipeline；27-air-introduced machine；
28-smoke discharging pipe；29-desulfurizer；30-chimney；31-air supply duct；32-wind powder mixing chamber；33-pressure fan.
Embodiment
The end points of disclosed scope and any value are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
It can be combined with each other between the endpoint value of individual scope and single point value, and individually between point value and obtain one or more
New number range, these number ranges should be considered as specific open herein.
In the utility model, in the case where not making opposite explanation, the noun of locality such as " upper and lower " used typically refers to join
Examine shown in the drawings upper and lower, the connection term used typically refers to the annexation shown in refer to the attached drawing.
The utility model provides a kind of lignite burning and utilizes system, as shown in figure 1, wherein, the system, which includes drying, to be filled
4, coal dust disconnecting gear, coal collector 9, UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit 19 and boiler 15 are put, the boiler 15 has main combustion
Burner 11, secondary burner 10 and high temperature furnace mouth 14, wherein, desiccant inlet and the high temperature furnace of the drying device 4
Mouth 14 is connected, and the high temperature in high temperature furnace mouth 14 can be utilized so as to the higher lignite of the water content in the drying device 4
Stove cigarette and be dried；Separated by what the drying device 4 was discharged by dry coal into the coal dust disconnecting gear,
The coal dust isolated by the coal dust disconnecting gear is burnt into the main burner 11, by the coal dust disconnecting gear point
The lack of gas containing coal dust separated out, which enter in the coal collector 9, further to be separated, and is isolated by the coal collector 9
Coal dust, which enters in the secondary burner 10, to be burnt, so as to which the coal dust carried in gas can be filled as secondary fuel
Divide and utilize, both improve fuel availability, reduce the generation of burner hearth nitrogen oxides again；The lack of gas isolated enter the waste heat
Using and dehydrating unit 19 handled, so as to make full use of the heat in lack of gas and reclaim the moisture in lack of gas.
In the utility model, there is no particular limitation for the coal dust disconnecting gear, can be one of this area routine
Or multiple equipment for coal dust separation, it is preferable that blower mill 5 that the coal dust disconnecting gear includes being sequentially connected, thick
Powder separator 6, powder pipeline processed 7 and pulverized-coal collector 8, the outlet phase of the entrance of the blower mill 5 and the drying device 4
Even, the lack of gas outlet of the pulverized-coal collector 8 is connected with the entrance of the coal collector 9.
In the utility model, it is preferable that the inside of the boiler 15 and exit is provided with air preheater 24.
In the utility model, the upstream device of the boiler 15 can be the conventional equipment in this area, such as the pot
The outlet of stove 15 is sequentially connected deduster 25, desulfurizer 29 and chimney 30.
In the utility model, made by using high-temperature flue gas caused by boiler 15 (being drawn by the high temperature furnace mouth 14)
It is dried for the drier lignite higher to the water content in the drying device 4, the moisture removal in lignite can be made
More than 90%.But because the temperature needed for drying brown coal is preferably 700-800 DEG C, and the temperature of high-temperature flue gas caused by boiler 15
Typically up to 1000-1200 DEG C, therefore the high-temperature flue gas further preferably needs to mix or do at cooling with other cryogenic gases of degree
Drier is re-used as after reason to be dried；It can be mixed in the utility model by the use of various media as drier, temperature can be made
Degree is adjusted to suitable temperature, such as moderate oven cigarette and low-temperature furnace smoke mixing, moderate oven cigarette and hot blast can be used to mix
Or high-temperature flue gas and hot blast.Because the oxygen content of these stove cigarettes is very low, lignite detonation thing in shattering process is dried can be avoided
Therefore generation, it is preferable that Control for Oxygen Content is below 12 weight %.Because the moisture in lignite is introduced into burner hearth, stove can be made
The rise of interior ignition temperature, is favorably improved fuel economy, reduces the heating surface area of boiler, reduce boiler and accessory system into
This.
In the utility model, it is preferable that low-temperature furnace smoke and the above-mentioned high temperature furnace that will be produced at the upstream device of boiler 15
Cigarette mixes to form 700-800 DEG C of mixed flue gas after, be re-used as drier into the drying device 4.Therefore, according to this
A kind of preferred embodiment of utility model, the lignite burning also include flue gas mixing-chamber 16, flue gas mixing using system
Room 16 is provided with high-temperature flue gas entrance, low-temperature furnace smoke entrance and the outlet of holding furnace cigarette, the high-temperature flue gas entrance and the high temperature
Stove mouth 14 be connected, the low-temperature furnace smoke entrance be connected to by low-temperature furnace smoke pipeline 22 deduster 25 upstream line,
On smoke discharging pipe 28 between the downstream line or the deduster 25 and the desulfurizer 29 of the desulfurizer 29, institute
The outlet of holding furnace cigarette is stated by holding furnace smoke pipeline 17 with the desiccant inlet of the drying device 4 to be connected.
In the utility model, the moisture in lignite is transformed into vapor by drying in the drying device 4
Form enter in flue gas, and enter by the gas solid separation of coal dust disconnecting gear and coal collector in lack of gas (in ability
Lack of gas are to refer to the ash-laden gas after coal dust separation in domain), by UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit 19 to the heat in lack of gas
Reclaimed using and to moisture.In the utility model, heat exchange is provided with the UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit 19
Pipeline 20, by UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit 19 while the heat exchange pipeline 20 is used to heat in the water in heat exchange pipeline 20
Water vapor condensation Cheng Shui in lack of gas, the outlet of the UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit 19 are connected to apparatus for recovering 21
(being used to collect the moisture in lack of gas) and lack of gas pipeline 26 (being used to the lack of gas after water removal being introduced into follow up device to be utilized).
Power plant's water system can be sent into after water heating in the heat exchange pipeline 20, can be used for heat supply, by the energy recovery,
Whole audience integrated heat efficiency is improved, there is significant economic benefit.
In the utility model, in order to further utilize heat caused by boiler, it is preferable that the lignite burning utilizes system
System also includes hot air duct 13, and the upstream of the hot air duct 13 flows through the air preheater 24, so as to utilize the heat of boiler
The gas attracted by pressure fan 33 is heated；The downstream of the hot air duct 13 is divided into one in following three tributaries
Or a plurality of (being preferably all three)：First tributary communicates with the main burner 11, Article 2 tributary and the secondary combustion
Burner 10 communicates, and Article 3 tributary is incorporated to the lack of gas pipeline 26.
In the utility model, it is preferable that the downstream of the hot air duct 13 is divided into all above-mentioned three tributaries.Pass through
First tributary communicates with the main burner 11, can aid in and helps coal dust to be blown into main burner, and improves wind powder
Temperature, also fed oxygen into main burner 11.Communicated by Article 2 tributary with the secondary burner 10, can also
Assist in coal dust and be blown into main burner, and improve the temperature of wind powder, also feed oxygen into secondary burner 10.
The lack of gas pipeline 26 is incorporated to by Article 3 tributary, hot blast can be added into lack of gas, wind powder temperature is improved, improves fuel
Flammability, boiler low load stable combustion performance, while ensure there is enough oxygen during boiler combustion.
In the utility model, it is preferable that be additionally provided between the hot air duct 13 and the main burner 11 secondary
Bellows 12.
In the utility model, in order to further utilize the lack of gas after water removal, it is preferable that be used to blow by the lack of gas after water removal
The coal dust for sending receipts back to is burnt into boiler, on the one hand realizes making full use of for resource, is on the other hand avoided coal dust and is existed
The problems such as spontaneous combustion being likely to occur in storage, conveying.Therefore, it is described brown according to a kind of preferred embodiment of the utility model
Coal combustion also includes wind powder mixing chamber 32 using system, and the wind powder mixing chamber 32 is provided with coal powder entrance, lack of gas entrance and material
Outlet, the coal powder entrance are connected with the discharge of the pulverized-coal collector 8, and the lack of gas entrance connects the lack of gas pipeline
26, the material outlet is connected with the main burner 11.
In the utility model, the drying device 4 is used to dry the high lignite raw material of water content, high brown of the water content
There is no particular limitation for the supply arrangement of coal raw material.For example, the lignite entrance upstream direction of the drying device 4 is sequentially connected
There are feeder 3, automatic weighing device 2 and run coal bin 1.
In the utility model, blower fan can be set at the position that arbitrarily needs, for example, can in the UTILIZATION OF VESIDUAL HEAT IN and
The upstream of dehydrating unit 19 sets excessive fan 18；Low-temperature furnace smoke blower fan 23 can be set on the low-temperature furnace smoke pipeline；
Air-introduced machine 27 can be set in the upstream of the desulphurization plant 29.
Lignite described in detail below according to a kind of embodiment as shown in Figure 1 of the present utility model, which burns, to be utilized
System and the method for operation：
The higher lignite of water content falls into drying device 4 after run coal bin 1 to automatic scales claims 2 meterings by feeder 3, and
With the second medium mixture that is made up of high-temperature flue gas and low-temperature furnace smoke as drier.1000~1200 DEG C of high-temperature flue gas are in boiler
The high temperature furnace mouth 14 of upper furnace is extracted, and low-temperature furnace smoke is derived between boiler tail flue gas dust removal device 25 and desulfurizer 29
Smoke discharging pipe 28, stokehold is delivered to by low-temperature furnace smoke blower fan 23 and low-temperature furnace smoke pipeline 22, is mixed into flue gas mixing-chamber 16
For 700~800 DEG C of drier, drier is delivered to drying device 4 by holding furnace smoke pipeline 17.Lignite is with drier in drying
Mixed in device 4, after preliminarily dried, into blower mill 5.Lignite is fractured into coal dust in blower mill 5, and is entered
One step is dried, and blower mill 5 exports coal dust moisture below 10%, and wind powder mixture temperature is between 150 DEG C~200 DEG C.
Wind powder mixture enters mill separator 6, and mill separator 6 sends thick pulverized coal particle back to blower mill 5 and continues to grind,
Qualified coal dust, which enters in pulverized-coal collector 8, to be separated, and the coal dust isolated falls into wind powder mixing chamber 32, then via lack of gas and hot blast group
Into pumped (conveying) medium be sent into main burner 11.
The lack of gas containing a small amount of fine powder that pulverized-coal collector 8 is isolated reclaim fine powder, fine powder conduct by coal collector 9
Secondary fuel, the secondary burner 10 of upper furnace is sent directly into after being mixed with hot blast, forms fuel-staged combustion.Coal powder collection
Device 9 exports lack of gas and is sent into UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit 19 through excessive fan 18, and contained a large amount of vapor are handed over through heat in lack of gas
Turn into liquid condensate after changing, condensate gives reuse by apparatus for recovering 21, and cooling water reclaims remaining by heat exchange pipeline 20
Heat, lack of gas mix the pumped (conveying) medium be used as and dry coal dust, heat after heat exchange and dehumidifying, by lack of gas pipeline 26 with appropriate hot blast
Wind mainly plays regulatory role.
In air flow, cold air is sent into air preheater 24 by pressure fan 33 and heated, while sets cold wind regulation dress
Put, hot-air is conveyed by hot air duct 13 and is divided into three tunnels, will using blow-through mode after being mixed all the way as First air with lack of gas
Coal dust is sent to boiler-burner 11, is also directed to burner 11 after the distribution of secondary air box 12 as Secondary Air all the way, in addition all the way
Enter secondary burner 10 with after the part fine powder mixing in coal collector 9, First air plays adjustment effect, and Secondary Air plays
Combustion-supporting effect, secondary fuel play fractional combustion effect, while the burning of boiler stability and high efficiency is realized, reduce pollutant row
Put.
Within the system, UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit 19 are arranged using binary channels, during single passage maintenance, do not influence be
System operation.When cooling water inflow deficiency, partial fume directly can be sent to desulfurizer 27 by bypass duct.
Within the system, drier flows through the resistance and wind powder mixture stream of holding furnace smoke pipeline 17 and drying device 4
Resistance through mill separator 6 and pulverized-coal collector 8 is provided by the lifting pressure head of blower mill 5 itself, and lack of gas flow through coal dust
The resistance of collector 9, UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit 19, wind powder mixing chamber 32 and corresponding pipeline is provided by excessive fan.
Preferred embodiment of the present utility model described in detail above, still, the utility model is not limited to this.At this
In the range of the technology design of utility model, a variety of simple variants can be carried out to the technical solution of the utility model, including it is each
Technical characteristic is combined with any other suitable method, and these simple variants and combination should equally be considered as the utility model
Disclosure of that, belong to the scope of protection of the utility model.
Claims (10)
1. a kind of lignite burning utilizes system, it is characterised in that the system includes drying device (4), coal dust disconnecting gear, coal dust
Collector (9), UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit (19) and boiler (15), the boiler (15) have main burner (11), secondary
Burner (10) and high temperature furnace mouth (14), wherein, desiccant inlet and the high temperature furnace mouth of the drying device (4)
(14) connect, by being separated by dry coal into the coal dust disconnecting gear for the drying device (4) discharge, by institute
State the coal dust that coal dust disconnecting gear is isolated to be burnt into the main burner (11), separated by the coal dust disconnecting gear
The lack of gas containing coal dust gone out, which enter in the coal collector (9), further to be separated, and is isolated by the coal collector (9)
Coal dust enter the secondary burner (10) in burnt, the lack of gas isolated enter the UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit
(19) handled.
2. lignite burning according to claim 1 utilizes system, it is characterised in that the coal dust disconnecting gear is included successively
Blower mill (5), mill separator (6), powder pipeline processed (7) and the pulverized-coal collector (8) of connection, the blower mill
(5) entrance is connected with the outlet of the drying device (4), and lack of gas outlet and the coal dust of the pulverized-coal collector (8) are received
The entrance of storage (9) is connected.
3. lignite according to claim 2 burning utilizes system, it is characterised in that the inside of the boiler (15) and close
Exit is provided with air preheater (24), and the outlet of the boiler (15) is sequentially connected deduster (25), desulfurizer (29)
With chimney (30).
4. lignite burning according to claim 3 utilizes system, it is characterised in that the lignite burning is also wrapped using system
Flue gas mixing-chamber (16) is included, the flue gas mixing-chamber (16) is provided with high-temperature flue gas entrance, low-temperature furnace smoke entrance and holding furnace cigarette and gone out
Mouthful, the high-temperature flue gas entrance is connected with the high temperature furnace mouth (14), and the low-temperature furnace smoke entrance passes through low-temperature furnace smoke pipeline
(22) upstream line of the deduster (25), the downstream line of the desulfurizer (29) or the deduster are connected to
(25) on the smoke discharging pipe (28) between the desulfurizer (29), the holding furnace cigarette outlet passes through holding furnace smoke pipeline
(17) desiccant inlet with the drying device (4) is connected.
5. lignite burning according to claim 3 utilizes system, it is characterised in that the UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit
(19) heat exchange pipeline (20) is provided with, while the heat exchange pipeline (20) is used to heat in the water in heat exchange pipeline (20) by more than
The water vapor condensation Cheng Shui in lack of gas in heat utilization and dehydrating unit (19), the UTILIZATION OF VESIDUAL HEAT IN and dehydrating unit (19) go out
Mouth is connected to apparatus for recovering (21) and lack of gas pipeline (26).
6. lignite burning according to claim 5 utilizes system, it is characterised in that the lignite burning is also wrapped using system
Hot air duct (13) is included, the upstream of the hot air duct (13) flows through the air preheater (24), the hot air duct (13)
Downstream is divided into one or more in following three tributaries：First tributary communicates with the main burner (11), Article 2 branch
Stream communicates with the secondary burner (10), and Article 3 tributary is incorporated to the lack of gas pipeline (26).
7. lignite burning according to claim 6 utilizes system, it is characterised in that the downstream of the hot air duct (13) point
Into three tributaries.
8. the lignite burning according to claim 5 or 6 utilizes system, it is characterised in that the lignite burning utilizes system
Also include wind powder mixing chamber (32), the wind powder mixing chamber (32) is provided with coal powder entrance, lack of gas entrance and material outlet, the coal
Powder entrance is connected with the discharge of the pulverized-coal collector (8), and the lack of gas entrance connects the lack of gas pipeline (26), described
Material outlet is connected with the main burner (11).
9. the lignite burning according to claim 6 or 7 utilizes system, it is characterised in that the hot air duct (13) and institute
State and be additionally provided with secondary air box (12) between main burner (11).
10. lignite burning according to claim 1 utilizes system, it is characterised in that the lignite of the drying device (4) enters
Mouth upstream direction is connected with feeder (3), automatic weighing device (2) and run coal bin (1) in turn.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720437439.XU CN206890551U (en) | 2017-04-24 | 2017-04-24 | A kind of lignite burning utilizes system |
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| CN201720437439.XU CN206890551U (en) | 2017-04-24 | 2017-04-24 | A kind of lignite burning utilizes system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644801A (en) * | 2018-03-13 | 2018-10-12 | 中国神华能源股份有限公司 | A kind of thermal power generation system |
| CN108662604A (en) * | 2018-03-13 | 2018-10-16 | 中国神华能源股份有限公司 | A kind of thermal power generation system |
| CN108916904A (en) * | 2018-03-13 | 2018-11-30 | 中国神华能源股份有限公司 | A kind of thermal power generation system |
-
2017
- 2017-04-24 CN CN201720437439.XU patent/CN206890551U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644801A (en) * | 2018-03-13 | 2018-10-12 | 中国神华能源股份有限公司 | A kind of thermal power generation system |
| CN108662604A (en) * | 2018-03-13 | 2018-10-16 | 中国神华能源股份有限公司 | A kind of thermal power generation system |
| CN108916904A (en) * | 2018-03-13 | 2018-11-30 | 中国神华能源股份有限公司 | A kind of thermal power generation system |
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