CN205979843U - Pretreatment systems of high sodium coal - Google Patents
Pretreatment systems of high sodium coal Download PDFInfo
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- CN205979843U CN205979843U CN201620839083.8U CN201620839083U CN205979843U CN 205979843 U CN205979843 U CN 205979843U CN 201620839083 U CN201620839083 U CN 201620839083U CN 205979843 U CN205979843 U CN 205979843U
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Abstract
The utility model relates to a coal -fired thermal power field discloses a pretreatment systems of high sodium coal, and this pretreatment systems of high sodium coal is including being used for making boiler and steam turbine and the buggy reservoir that subsystem, order are connected with the buggy that the buggy was made to high sodium coal, the boiler with the steam turbine is made the subsystem with the buggy respectively and is connected in order to provide heat energy, buggy reservoir connect in the subsystem is made in order to be used for storing the buggy to the buggy, the system still including connect in the gas cleaning device of the fume emission pipeline of boiler, buggy reservoir is for closed container and be provided with buggy protective gas input port, and this buggy protective gas input port passes through flue gas conveying line and connects in the gas exhaust port of gas cleaning device. The utility model discloses in, make the buggy to high sodium coal preliminary treatment powder process, to recycle buggy reservoir and carry out the protectiveness to the buggy and store, the buggy that makes is compared and is stored more easily and transport in high sodium raw coal, and it is economical and practical to utilize flue gas tail gas to store the buggy.
Description
Technical field
This utility model is related to coal-fired field of thermal power, in particular it relates to a kind of pretreatment system of high sodium coal.
Background technology
High sodium coal refers to the coal that sodium content in coal (in terms of ash) is more than 2%, and for example, the quasi- east coal of Xinjiang of China just belongs to
In high sodium coal, Xinjiang Zhun Dong coalfield is China or even the whole world self-contained coalfield maximum at present, and it is developed has to China
Important meaning.
At present, in quasi- east coalfield, the quasi- east coal as high sodium coal is directly transported after raw coal using mainly producing
To using ground or processing ground, such as coal-fired power plant.And " moisture " that contains in raw coal is more, causes " fortune water " in transportation
Account for the larger part of freight, considerably increase cost, and using box open-top car transport, transporting to more than the transport of raw coal
Cheng Zhonghui loss raw coal and pollution environment.Because quasi- east coalfield storage capacity is huge, some areas amount of using is limited after all, therefore,
Institute's producing coal must need the conveying into the whole country, and traditional use pattern limits quasi- east coalfield while increasing cost
Wide scope transport uses.
Utility model content
The purpose of this utility model is to provide a kind of pretreatment system of high sodium coal.
To achieve these goals, this utility model provides a kind of pretreatment system of high sodium coal, the pre- place of this high sodium coal
Reason system includes coal dust manufacturing subsystem, the boiler being linked in sequence and steam turbine and coal dust for high sodium coal is made coal dust
Storage container, described boiler and described steam turbine are connected to provide heat energy with described coal dust manufacturing subsystem respectively, described coal dust
Storage container is connected to described coal dust manufacturing subsystem for storing coal dust；The pretreatment system of described high sodium coal is also included even
It is connected to the smoke eliminator of the flue gas exhausting pipe line of described boiler, described coal dust storage container is closed vessel and is provided with coal
Powder protective gas input port, this coal dust protective gas input port is connected to described smoke eliminator by flue gas delivery pipe road
Exhaust port.
Preferably, the pretreatment system of described high sodium coal also includes tail gas storage container, in described flue gas delivery pipe road,
Described tail gas storage container is serially arranged between described smoke eliminator and described coal dust storage container.
Preferably, described coal dust manufacturing subsystem includes Pulverized Coal Bin, and the discharging opening of this Pulverized Coal Bin is held with described coal dust storage
The feeding mouth of the feeding mouth of device and described boiler connects respectively；The discharge outlet of described coal dust storage container is provided with discharging dress
Put.
Preferably, described coal dust manufacturing subsystem include being linked in sequence for hot water wash removing sodium process is carried out to high sodium coal
To obtain the washing coal unit of wet removing sodium coal, for being dried to described wet removing sodium coal to obtain the drying unit of dry removing sodium coal
And for carrying out to described dry removing sodium coal crushing to make the powder unit processed of coal dust.
Preferably, described washing coal unit includes coal washing water circulation, and the coal washing water in described coal washing water circulation passes through circulation
Pipeline follows after flowing through the external heater of coal washing water, washing device for coal, equipment for separating liquid from solid, waste water purification device and water pump successively
Circulation is back to the external heater of described coal washing water；
The external heater of described coal washing water includes described condenser, and the steam discharge pipe of described steam turbine is connected to described
Condenser, the flow pipe of described coal washing water flows through the inside of described condenser, to carry out heat exchange.
Preferably, described coal dust manufacturing subsystem also includes being connected to described washing device for coal for described washing coal
The coal breaker of device provisioning high sodium coal after crushing.
Preferably, described drying unit includes fluid bed dryer, is connected to the flue dust outlet of described fluid bed dryer
Cyclone separator, the first gas-to-gas heat exchanger and for described fluid bed dryer conveying dry gas drying machine
Admission line, the discharge duct of described cyclone separator and described drying machine admission line are all by described first gas-gas heat exchange
The inside of device, to carry out heat exchange；And it is provided with blower fan on described drying machine admission line.
Preferably, described fluid bed dryer be internally provided with fluid bed dryer internal heater, described fluid bed
The input duct of drying machine internal heater is connected to the steam (vapor) outlet of described steam turbine；The built-in heating of described fluid bed dryer
Vapour-gas heat exchanger is additionally provided with the drain pipe road of device, described drying machine admission line passes through the interior of described vapour-gas heat exchanger
Portion, to carry out heat exchange；
And, described washing device for coal includes washing device for coal internal heater, the built-in heating of described fluid bed dryer
The drain pipe road of device after described vapour-gas heat exchanger, is continuing to be connected to the feed liquor of described washing device for coal internal heater
Mouthful.
Preferably, described drying unit also includes the second gas-to-gas heat exchanger, and the gas exhaust piping of described smoke eliminator is even
It is connected to the smoke inlet of described second gas-to-gas heat exchanger, described drying machine admission line passes through described second gas-to-gas heat exchanger
Inside, to carry out heat exchange.
Preferably, described drying unit includes fluid bed dryer, and described powder unit processed includes the coal pulverizer being linked in sequence
With wind powder separator；The feeding mouth of described coal pulverizer is connected to the discharging opening of described fluid bed dryer, described wind powder separator
Discharging opening be connected to described Pulverized Coal Bin.
Preferably, the gas exhaust piping of described smoke eliminator is connected to described coal pulverizer.
Preferably, the pretreatment system of described high sodium coal also includes air preheater, the aerofluxuss of described smoke eliminator
Pipeline, before being connected to described coal pulverizer, first passes through the inside of described air preheater, to carry out heat exchange；Described air is pre-
The air inlet of hot device is connected with air supply device, and gas outlet is connected to the air outlet of described boiler.
Preferably, described powder unit processed also includes cleaner unit, and the entrance of this cleaner unit is connected to described wind powder separator
Air vent, the discharge gate of this cleaner unit is connected to described Pulverized Coal Bin.
Preferably, the external heater of described coal washing water also includes air-water heat exchanger, and this air-water heat exchanger is solidifying with described
Vapour device is connected, and, the discharge duct of described cleaner unit passes through the inside of described air-water heat exchanger, to carry out heat exchange.
In the pretreatment system of high sodium coal of the present utility model, coal dust, Ran Houjian are obtained to high sodium Coal pretreatment powder
Cause the problem of potential safety hazard in the longer easy burning of coal dust pilling up time, recycle coal dust storage container that coal dust is protected
The storage of shield property, prepared coal dust is stored more easily compared to high sodium raw coal and transports (for example, it is possible to pot type stores and transports, phase
Than at present many to the transport of raw coal using the transport of box open-top car, reduce loss raw coal and pollution environment), advantageously reduce transport
Cost；And, this utility model be the flue tail gas that boiler is used as coal dust protective gas, the flue gas of boiler is at purification
After reason, its most of composition is carbon dioxide and nitrogen, and its oxygen content is generally below 5%, be enough to serve as coal dust shielding gas
Body, this mode economical and practical it is easy to implement；Meanwhile, to provide heat to coal dust manufacturing subsystem also by boiler and steam turbine
Can, make full use of the waste heat of boiler and steam turbine, there is preferable economic benefit.
Other features and advantages of the utility model will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide and further understands to of the present utility model, and constitutes a part for description, and following
Specific embodiment be used for together explaining this utility model, but do not constitute to restriction of the present utility model.In the accompanying drawings：
Fig. 1 is the schematic diagram of the pretreatment system of the high sodium coal according to preferred implementation of the present utility model.
Description of reference numerals
1 boiler 2 smoke eliminator
3 steam turbine 4 electromotor
5 condenser 6 air-water heat exchanger
Device for coal washed by 7 coal breaker 8
9 washing device for coal internal heater 10 equipment for separating liquid from solid
11 water pump 12 waste water purification device
13 tail gas storage container 14 blower fan
15 vapour-gas heat exchanger 16 first gas-to-gas heat exchanger
17 cyclone separator 18 fluid bed dryer
19 fluid bed dryer internal heater 20 air preheater
21 cleaner unit 22 coal pulverizer
23 wind powder separator 24 Pulverized Coal Bin
25 second gas-to-gas heat exchanger 26 coal dust bin
27 device for discharging 28 coal dust transport vehicle
Specific embodiment
Below in conjunction with accompanying drawing, specific embodiment of the present utility model is described in detail.It should be appreciated that herein
Described specific embodiment is merely to illustrate and explains this utility model, is not limited to this utility model.
This utility model provides a kind of pretreatment system of high sodium coal, and the pretreatment system of this high sodium coal is included for inciting somebody to action
Coal dust manufacturing subsystem, the boiler 1 being linked in sequence and steam turbine 3 and the coal dust storage container 26 that coal dust made by high sodium coal, institute
State boiler 1 and described steam turbine 3 is connected to provide heat energy with described coal dust manufacturing subsystem respectively, described coal dust storage container 26
It is connected to described coal dust manufacturing subsystem for storing coal dust；The pretreatment system of described high sodium coal also includes being connected to described
The smoke eliminator 2 of the flue gas exhausting pipe line of boiler 1, described coal dust storage container 26 is closed vessel and is provided with coal dust guarantor
Shield gas input port, this coal dust protective gas input port is connected to the tail of described smoke eliminator 2 by flue gas delivery pipe road
Gas floss hole.
In the pretreatment system of high sodium coal of the present utility model, coal dust, Ran Houjian are obtained to high sodium Coal pretreatment powder
Cause the problem of potential safety hazard in the longer easy burning of coal dust pilling up time, recycle coal dust storage container 26 that coal dust is carried out
Protectiveness store, prepared coal dust be stored more easily compared to high sodium raw coal and transport (for example, it is possible to pot type storage and transport,
Using box open-top car transport more than the current transport to raw coal, reduce loss raw coal and pollution environment), advantageously reduce fortune
Defeated cost；And, this utility model is to be used the flue tail gas of boiler 1 as coal dust protective gas, and the flue gas of boiler 1 is through net
After change is processed, its most of composition is carbon dioxide and nitrogen, and its oxygen content is generally below 5%, be enough to serve as coal dust guarantor
Shield gas, this mode economical and practical it is easy to implement；Meanwhile, come to coal dust manufacturing subsystem also by boiler 1 and steam turbine 3
Heat energy is provided, makes full use of boiler 1 and the waste heat of steam turbine 3, there is preferable economic benefit.
Wherein, preprocessed prepared coal dust can be used as the raw material of boiler 1, and the pretreatment system of described high sodium coal is also
The electromotor 4 being connected to steam turbine 3 being included, thus realizing generating electricity while carrying out pretreatment to high sodium coal, and utilizing
In power generation process, the waste heat (steam waste heat of the such as fume afterheat of boiler 1 and steam turbine 3) of boiler 1 and steam turbine 3 generation comes
There is provided heat energy it is achieved that making full use of to energy for coal dust manufacturing subsystem, having higher economic benefit.
Preferably, the pretreatment system of described high sodium coal also includes tail gas storage container 13, on described flue gas delivery pipe road
In, described tail gas storage container 13 is serially arranged between described smoke eliminator 2 and described coal dust storage container 26.Tool
Body ground, the flue gas exhausting pipe line of described boiler 1 is connected to the air inlet of smoke eliminator 2, the row of described smoke eliminator 2
Feed channel is connected to the entrance of described tail gas storage container 13, and the outlet of described tail gas storage container 13 is connected to described coal dust and protects
Shield gas input port.In this case, tail gas storage container 13 is used for the boiler exhaust gas after purifying, with coal dust storage container
26 provide protective gas when needing at any time.
And, described coal dust manufacturing subsystem can include Pulverized Coal Bin 24, the discharging opening of this Pulverized Coal Bin 24 and described coal dust
The feeding mouth of the feeding mouth of storage container 26 and described boiler 1 connects respectively；The discharge outlet of described coal dust storage container 26 sets
It is equipped with device for discharging 27.So, Pulverized Coal Bin 24 is only used as temporarily storing the device of coal dust, and coal dust can be in coal dust storage container 26
Protective atmosphere (oxygen content is relatively low) under safe storage it is possible to using in Pulverized Coal Bin 24 storage coal dust provide for boiler 1
Raw material.
In addition, at present to using box open-top car transport, can be lost in transportation more than the transport of raw coal raw coal and
Pollution environment, in this utility model, it is possible to use canned vehicle transport coal dust, thus solve coal consumption and damaging and pollute asking of environment
Topic.For example, in the preferred implementation of Fig. 1, the pretreatment system of high sodium coal can also include coal dust transfer cask, can be by this coal
Powder transfer cask is positioned in suitable coal dust transport vehicle 28, from the device for discharging 27 of coal dust storage container 26, coal dust is unloaded loading coal
In powder transfer cask, and described coal dust transfer cask can also be connected with the outlet of described tail gas storage container 13 to fill coal dust
After be filled with coal dust protective gas.So, the feasibility of coal dust transport by the way of centralized system powder and canned dispensing, is effectively ensured
And safety, reduce freight volume.
Preferably, described coal dust manufacturing subsystem include being linked in sequence for hot water wash removing sodium process is carried out to high sodium coal
To obtain the washing coal unit of wet removing sodium coal, for being dried to described wet removing sodium coal to obtain the drying unit of dry removing sodium coal
And for carrying out to described dry removing sodium coal crushing to make the powder unit processed of coal dust.
At present, in quasi- east coalfield, the quasi- east coal as high sodium coal is directly transported after raw coal using mainly producing
To using ground, such as coal-fired power plant, it is used together mixing burning contamination coal with using.And in coal-fired power plant, using high sodium
Burner in the stove slagging scorification serious and high temperature superheater, high temperature reheater stain blocking the problems such as occurs, greatly during coal
Reduce greatly the utilization rate of equipment, have a strong impact on the safety and economic operation of boiler.
Trace it to its cause, this is closely related with the high feature of sodium content in high sodium coal.During using high sodium coal, sodium meeting
It is volatized into gas phase, the sodium vapor in flue gas is easy to be condensate in heat-exchanger surface formation condensate film, in sticky molten,
Trapping solid particle, accelerates the formation of bonding ash, and therefore burner in the stove slagging scorification is serious and high temperature superheater, high temperature reheater
Occur staiing blocking, and the alkali metal vapour in high sodium coal makes SCR denitration be poisoned, and also reduces denitration efficiency.And
Existing mixing is burnt to the method that is used together of contamination coal and can only be slowed down contamination it is impossible to tackle the problem at its root, seriously
Hinder quasi- east coalfield to use on a large scale.
In high sodium coal, sodium is many is existed with water-soluble na form, sodium during the occurrence patterns in coal directly determine and use with
Vaporous form enters the share of gas phase, thus directly affecting the utilization rate of equipment, research shows, water solublity sodium is during using
The most volatile entrance gas phase.
In addition, " moisture " that contains in raw coal is more, causes " fortune water " in transportation and account for larger one of freight
Point, considerably increase cost.
In the pretreatment system of the high sodium coal of this preferred implementation, coal dust manufacturing subsystem passes through the water being linked in sequence
Coal washing unit, drying unit and powder unit processed carry out to high sodium coal washing removing sodium, drying and being broken for coal dust, and by arranging pot
Stove 1 and steam turbine 3 to provide heat energy to coal dust manufacturing subsystem；It is particularly suited for building in the place nearer apart from high sodium coalfield
Make, by carrying out integrating the concentration pretreatment of coal washing, drying and powder processed to high sodium coal nearby, the sodium sloughed in high sodium coal becomes
Point, be dried after and be fabricated to the coal dust of convenient use, because sodium content is high during not only avoid that high sodium coal is follow-up and using
The problems such as Slagging causing, be dried coal dust it also avoid high sodium coal directly transport " fortune water " cost bringing so that after
The defeated more economical convenience of reforwarding.
It will be appreciated by those skilled in the art that, in this utility model, for washing coal unit, drying unit and
Powder unit processed etc., can be with according to being that practical situation is designed as any appropriate form, below referring to accompanying drawing 1 to of the present utility model
The preferred implementation of the pretreatment system of high sodium coal is described, but it is served only for explanation and is not limited to this practicality newly
Type.
Preferably, described washing coal unit includes coal washing water circulation, and the coal washing water in described coal washing water circulation passes through circulation
Pipeline flows through the external heater of coal washing water, washing device for coal 8, equipment for separating liquid from solid 10, waste water purification device 12 and water successively
Pump 11 Posterior circle flows back into the external heater of described coal washing water；The external heater of described coal washing water includes described condenser 5,
The steam discharge pipe of described steam turbine 3 is connected to described condenser 5, and the flow pipe of described coal washing water flows through described condenser 5
Inside, to carry out heat exchange.
In condenser 5, coal washing water in its flow pipe through the discharge of steam pipeline of steam turbine 3 in steam waste heat carry out
Heating, condenser 5 realizes cooling to the arranged steam of steam turbine 3 and the heating of coal washing water；Coal washing water is right in washing device for coal 8
After high sodium coal is washed, equipment for separating liquid from solid 10 is realized, by washing device for coal 8 coal-water mixture solid-liquid separation out, separating
Waste water afterwards enters waste water purification device 12, and washing waste water is purified by waste water purification device 12, and the water after purification is by water pump 11 pump
Send and realize water circulation use；Furthermore it is also possible to the correct position setting water supplement port in coal washing water circulation is with when needed to washing
Coal water is fed, for example, it is possible to arrange water supplement port at water pump 11；In addition, washing device for coal 8 can carry internal heater
And agitator, realize high sodium coal and being sufficiently mixed of the coal washing water with uniform temperature, thus reaching the purpose of efficient removing sodium；And
And, wherein said equipment for separating liquid from solid 10 is used for rapidly and efficiently separating coal and water, can put into organic or inorganic flocculation wherein
Agent, the such as flocculant such as polyacrylamide, aluminum sulfate, aluminum chloride, iron sulfate, iron chloride；Waste water purification device 12 can be using distillation
Or the method such as reverse osmosiss equipment for separating liquid from solid 10 is separated after purification of waste water, the concentrated solution extracting can be used for alkaline etc.,
Water after purification then sends into coal washing water circulation by water pump 11, realizes water circulation use.
Preferably, described coal dust manufacturing subsystem also includes being connected to described washing device for coal 8 for described washing
Device for coal 8 supplies the coal breaker 7 of high sodium coal after crushing, so that the high sodium coal entering in washing device for coal 8 first passes through just
Step is broken, optimizes its removing sodium effect in washing device for coal 8.
Preferably, described drying unit includes fluid bed dryer 18, is connected to the flue dust of described fluid bed dryer 18
The cyclone separator 17 of outlet, the first gas-to-gas heat exchanger 16 and for gas being dried to the conveying of described fluid bed dryer 18
The drying machine admission line of body, the discharge duct of described cyclone separator 17 and described drying machine admission line are all by described
The inside of one gas-to-gas heat exchanger 16, to carry out heat exchange；And it is provided with blower fan 14 on described drying machine admission line.
Wherein, described fluid bed dryer 18 is connected to the discharging opening of described equipment for separating liquid from solid 10, through solid-liquid separation dress
Put in the 10 wet removing sodium coals entrance fluid bed dryers 18 isolated and be dried process；Described fluid bed dryer 18 can within
It is equipped with heater, wet removing sodium coal is dried under the heating of this internal heater and hot-air.And wherein, cyclone separator 17
The flue gas that eject fluid bed dryer 18 or weary gas enter sector-style powder and separate, the flue gas after purification or weary pneumatic transmission enter the first gas-
Gas heat exchanger 16, the first gas-to-gas heat exchanger 16 flue gas after purifying through cyclone separator 17 or weary gas are by drying machine air inlet pipe
Air heating in road, the air of heating is sent in fluid bed dryer 18 through blower fan 14 and wet removing sodium coal is dried.Described
Fluid bed dryer 18 is single-layer fluidized bed drying machine, multicompartment fluidized bed drying machine, horizontal multi-chamber fluidized bed dryer, vibration stream
Change bed dryer or spouted fluidized bed dryer.
It is further preferred that described fluid bed dryer 18 be internally provided with fluid bed dryer internal heater 19,
The input duct of described fluid bed dryer internal heater 19 is connected to the steam (vapor) outlet of described steam turbine 3；Described fluid bed
Vapour-gas heat exchanger 15 is additionally provided with the drain pipe road of drying machine internal heater 19, described drying machine admission line passes through institute
State the inside of vapour-gas heat exchanger 15, to carry out heat exchange；And, described washing device for coal 8 includes washing the built-in heating of device for coal
Device 9, the drain pipe road of described fluid bed dryer internal heater 19 after described vapour-gas heat exchanger 15, is continuing to connect
Inlet in described washing device for coal internal heater 9.
In this case, three-level utilization has been carried out to the steam waste heat of steam turbine 3, be respectively at fluid bed dryer 18
For wet removing sodium coal be dried provide heat energy, at vapour-gas heat exchanger 15, the air in drying machine admission line is heated with
And at washing device for coal internal heater 9, coal washing water carried out heating, realize efficient removing sodium, thus improve to steam turbine 3
The utilization rate of steam waste heat, reaches more preferable economic benefit.In addition, the steam of steam turbine 3 is through the built-in heating of fluid bed dryer
Device 19 can be back to the feed water system of boiler to vapour-gas heat exchanger 15, then after washing device for coal internal heater 9.
Preferably, described drying unit also includes the second gas-to-gas heat exchanger 25, and the pretreatment system of described high sodium coal also wraps
Include smoke eliminator 2, the flue gas exhausting pipe line of described boiler 1 is connected to the air inlet of smoke eliminator 2, and described flue gas is net
The gas exhaust piping of gasifying device 2 is connected to the smoke inlet of described second gas-to-gas heat exchanger 25, and described drying machine admission line passes through
The inside of described second gas-to-gas heat exchanger 25, to carry out heat exchange.In this case, also it is effectively utilized more than the flue gas of boiler 1
Heat preheats to entering the dry air in fluid bed dryer 18, to obtain more preferably more efficient drying effect；Second
Gas-to-gas heat exchanger 25 is additionally provided with the exhanst gas outlet relative with described smoke inlet, the flue gas after dry air is preheated
Can be directly discharged in air.
Referring in Fig. 1, this preferred implementation, enter fluid bed dryer 18 dry air sequentially pass through the first gas-
Pre- to the air one-level in drying machine admission line with the flue gas after cyclone separator 17 purification or weary gas at gas heat exchanger 16
Heat, at vapour-gas heat exchanger 15 with the steam of the steam turbine 3 through fluid bed dryer internal heater 19 to drying machine air inlet pipe
Then the two grades of preheatings of air in road carry out three-level preheating with the flue gas of described boiler 1 at the second gas-to-gas heat exchanger 25, thus
Achieve and boiler 1 and steam turbine 3 waste heat are made full use of, also improve fully pre- to the air in drying machine admission line
Heat.
As a kind of embodiment, described drying unit includes fluid bed dryer 18, and described powder unit processed includes order
The coal pulverizer 22 connecting and wind powder separator 23；The feeding mouth of described coal pulverizer 22 is connected to going out of described fluid bed dryer 18
Material mouth, the discharging opening of described wind powder separator 23 is connected to Pulverized Coal Bin 24；The discharging opening of described Pulverized Coal Bin 24 is connected to described pot
The entrance of stove 1.It is transported to warp after coal pulverizer 22 to crush and wear into coal dust through the dried dry removing sodium coal of fluid bed dryer 18, then
Through wind powder separator 23, the coal dust isolated is stored in Pulverized Coal Bin 24, further, it is possible to use the coal dust storing in Pulverized Coal Bin 24
There is provided raw material for boiler 1, after being dried through fluid bed dryer 18, in coal dust, moisture is extremely low, be conducive to the overall effect of boiler 1
The raising of rate.
Preferably, the gas exhaust piping of described smoke eliminator 2 is connected to described coal pulverizer 22, and coal pulverizer 22 is in purification
The drying of boiler 1 flue gas blows, under effect, dry removing sodium coal is ground qualified coal dust.
And, the pretreatment system of described high sodium coal can also include air preheater 20, the fume emission of described boiler 1
Pipeline is connected to the air inlet of smoke eliminator 2, and the discharge duct of described smoke eliminator 2 is being connected to described coal pulverizer
Before 22, first pass through the inside of described air preheater 20, to carry out heat exchange；The air inlet of described air preheater 20 connects
There is air supply device, gas outlet is connected to the air outlet of described boiler 1.As such, it is possible to using boiler 1 fume afterheat to entering
The air entering boiler carries out waste heat, realizes the making full use of of fume afterheat of boiler 1.
Preferably, described powder unit processed also includes cleaner unit 21, and the entrance of this cleaner unit 21 is connected to described wind powder and separates
The air vent of device 23, the discharge gate of this cleaner unit 21 is connected to described Pulverized Coal Bin 24.Cleaner unit 21 is used for wind powder separator 23
The gas that may carry a small amount of coal dust secretly discharged carries out dedusting, and the solid particulate matter (coal dust) obtaining after dedusting is delivered to coal dust
In storehouse 24.
On this basis it is further preferred that the external heater of described coal washing water also includes air-water heat exchanger 6, this gas-
Water- to-water heat exchanger 6 is connected with described condenser 5, and, the discharge duct of described cleaner unit 21 passes through described air-water heat exchanger 6
Inside, to carry out heat exchange.As such, it is possible to the gas that has surplus heat of band discharged using cleaner unit 21 is at air-water heat exchanger 6 pair
Coal washing water is preheated, and realizes making full use of of energy, energy-conserving and environment-protective.
So far, referring to Fig. 1, this preferred implementation in, coal washing water sequentially passes through what steam turbine 3 at condenser 5 was discharged
The gas (fume afterheat of boiler 1) that the band that at the one-level heating of steam, air-water heat exchanger 6, cleaner unit 21 is discharged has surplus heat
The three-level heating of steam turbine 3 steam waste heat at two grades of heating and washing device for coal internal heater 9, it is achieved thereby that to boiler
1 and the making full use of of steam turbine 3 waste heat, also improve the abundant heating to coal washing water, to obtain efficient removing sodium effect.
In this preferred implementation, the flue gas of boiler 1 generation divides two after sequentially passing through smoke eliminator 2 and air preheater 20
Part respectively enters coal pulverizer 22 and the second gas-to-gas heat exchanger 25, and coal pulverizer 22 blows general under effect in the drying of purifying smoke
Dry removing sodium coal grinds qualified coal dust, and the weary gas carrying dust in coal pulverizer 22 enters cleaner unit 21 dedusting, the cigarette after removing dust
Pneumatic transmission enters to wash the air-water heat exchanger 6 in coal unit, heats coal washing water, and the air that the coal dust in Pulverized Coal Bin and band have surplus heat
Boiler 1 hearth combustion then can be sent into together.And the steam that boiler 1 produces then enters steam turbine 3 pushing generator 4 and generates electricity, vapour
The steam that turbine 3 is extracted out divides two parts to respectively enter fluid bed dryer internal heater 19 and condenser 5, enters fluidized bed and does
Steam in dry machine internal heater 19 is back to condensation again after vapour-gas heat exchanger 15, washing device for coal internal heater 9
Water backwater position, the steam entering condenser 5, also to coagulation hydroenergy backwater position, realizes boiler water system circulation.
Wherein, described air-water heat exchanger 6, vapour-gas heat exchanger 15, the first gas-to-gas heat exchanger 16 and the second gas-gas heat exchange
Device 25 is used for for working medium being heated to demand temperature, can adopt rotary generative heat exchanger or heat exchange of heat pipe.
By the pretreatment system of high sodium coal of the present utility model, high sodium coal is passed through removing sodium, coal dust is made in drying again, no
Only be conducive to the later use of coal, and greatly reduce the water content in coal so that cost of transportation reduces.
The pretreatment system suggestion of high sodium coal of the present utility model is selected in relatively near and water resource is more filled away from high sodium coal producing region
The geographical position setting of foot, the high sodium coal only pretreatment of exploitation is milled into being suitable for boilers of power plants or other coal unit requires
The coal dust of particle diameter, then the unloading transporting equipment through being furnished with safety precautions deliver to coal ground.
Describe preferred implementation of the present utility model above in association with accompanying drawing in detail, but, this utility model does not limit
Detail in above-mentioned embodiment, in range of the technology design of the present utility model, can be to skill of the present utility model
Art scheme carries out multiple simple variant, and these simple variant belong to protection domain of the present utility model.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, this utility model is to each
Plant possible compound mode no longer separately to illustrate.
Additionally, combination in any can also be carried out, as long as it is not disobeyed between various different embodiment of the present utility model
Carry on the back thought of the present utility model, it equally should be considered as content disclosed in the utility model.
Claims (14)
1. a kind of pretreatment system of high sodium coal is it is characterised in that the pretreatment system of this high sodium coal is included for by high sodium coal
The coal dust manufacturing subsystem making coal dust, the boiler (1) being linked in sequence and steam turbine (3) and coal dust storage container (26), institute
State boiler (1) and described steam turbine (3) is connected to provide heat energy with described coal dust manufacturing subsystem respectively, described coal dust storage is held
Device (26) is connected to described coal dust manufacturing subsystem for storing coal dust；The pretreatment system of described high sodium coal also includes connecting
In the smoke eliminator (2) of the flue gas exhausting pipe line of described boiler (1), described coal dust storage container (26) is for closed vessel simultaneously
It is provided with coal dust protective gas input port, it is net that this coal dust protective gas input port is connected to described flue gas by flue gas delivery pipe road
The exhaust port of gasifying device (2).
2. the pretreatment system of high sodium coal according to claim 1 is it is characterised in that the pretreatment system of described high sodium coal
Also include tail gas storage container (13), in described flue gas delivery pipe road, described tail gas storage container (13) is serially arranged in
Between described smoke eliminator (2) and described coal dust storage container (26).
3. the pretreatment system of high sodium coal according to claim 1 is it is characterised in that described coal dust manufacturing subsystem includes
Pulverized Coal Bin (24), the feeding mouth of the discharging opening of this Pulverized Coal Bin (24) and described coal dust storage container (26) and described boiler (1)
Feeding mouth connects respectively；The discharge outlet of described coal dust storage container (26) is provided with device for discharging (27).
4. the pretreatment system of high sodium coal according to claim 1 is it is characterised in that described coal dust manufacturing subsystem includes
Be linked in sequence for high sodium coal being carried out with hot water wash removing sodium process to obtain the washing coal unit of wet removing sodium coal, for described
Wet removing sodium coal is dried the drying unit to obtain dry removing sodium coal and is used for described dry removing sodium coal being carried out crush to make
The powder unit processed of coal dust.
5. the pretreatment system of high sodium coal according to claim 4 is it is characterised in that described washing coal unit includes coal washing
Water circulation, the coal washing water in described coal washing water circulation flows through the external heater of coal washing water, washing coal successively by flow pipe
It is external that device (8), equipment for separating liquid from solid (10), waste water purification device (12) and water pump (11) Posterior circle flow back into described coal washing water
Heater；
The external heater of described coal washing water also includes condenser (5), and the steam discharge pipe of described steam turbine (3) is connected to described
Condenser (5), the flow pipe of described coal washing water flows through the inside of described condenser (5), to carry out heat exchange.
6. the pretreatment system of high sodium coal according to claim 5 is it is characterised in that described coal dust manufacturing subsystem is also wrapped
Include the broken coal being connected to described washing device for coal (8) for the high sodium coal after crushing to described washing device for coal (8) supply
Machine (7).
7. the pretreatment system of high sodium coal according to claim 5 is it is characterised in that described drying unit includes fluid bed
Drying machine (18), the cyclone separator (17) of flue dust outlet being connected to described fluid bed dryer (18), the first gas-gas heat exchange
Device (16) and the drying machine admission line for the conveying dry gas to described fluid bed dryer (18), described whirlwind divides
From the discharge duct of device (17) and described drying machine admission line all by the inside of described first gas-to-gas heat exchanger (16), with
Carry out heat exchange；And blower fan (14) is provided with described drying machine admission line.
8. according to claim 7 high sodium coal pretreatment system it is characterised in that described fluid bed dryer (18) interior
Portion is provided with fluid bed dryer internal heater (19), and the input duct of described fluid bed dryer internal heater (19) is even
It is connected to the steam (vapor) outlet of described steam turbine (3)；Also set up on the drain pipe road of described fluid bed dryer internal heater (19)
There is vapour-gas heat exchanger (15), described drying machine admission line passes through the inside of described vapour-gas heat exchanger (15), to carry out heat friendship
Change；
And, described washing device for coal (8) includes washing device for coal internal heater (9), described fluid bed dryer is built-in to be added
The drain pipe road of hot device (19) after described vapour-gas heat exchanger (15), continue to be connected to described washing device for coal built-in plus
The inlet of hot device (9).
9. the pretreatment system of high sodium coal according to claim 7 is it is characterised in that described drying unit also includes second
Gas-to-gas heat exchanger (25), the gas exhaust piping of described smoke eliminator (2) is connected to described second gas-to-gas heat exchanger (25)
Smoke inlet, described drying machine admission line passes through the inside of described second gas-to-gas heat exchanger (25), to carry out heat exchange.
10. the pretreatment system of high sodium coal according to claim 5 is it is characterised in that described drying unit includes fluidizing
Bed dryer (18), described powder unit processed includes the coal pulverizer (22) being linked in sequence and wind powder separator (23)；Described coal pulverizer
(22) feeding mouth is connected to the discharging opening of described fluid bed dryer (18), and the discharging opening of described wind powder separator (23) connects
In described Pulverized Coal Bin (24).
The pretreatment system of 11. high sodium coals according to claim 10 is it is characterised in that described smoke eliminator (2)
Gas exhaust piping be connected to described coal pulverizer (22).
The pretreatment system of 12. high sodium coals according to claim 11 is it is characterised in that the pretreatment system of described high sodium coal
System also includes air preheater (20), the gas exhaust piping of described smoke eliminator (2) be connected to described coal pulverizer (22) it
Before, first pass through the inside of described air preheater (20), to carry out heat exchange；The air inlet of described air preheater (20) connects
There is air supply device, gas outlet is connected to the air outlet of described boiler (1).
The pretreatment system of 13. high sodium coals according to claim 10 is it is characterised in that described powder unit processed also includes removing
Dirt device (21), the entrance of this cleaner unit (21) is connected to the air vent of described wind powder separator (23), the row of this cleaner unit (21)
Material mouth is connected to described Pulverized Coal Bin (24).
The pretreatment system of 14. high sodium coals according to claim 13 is it is characterised in that the external heating of described coal washing water fills
Put and also include air-water heat exchanger (6), this air-water heat exchanger (6) is connected with described condenser (5), and, described cleaner unit
(21) discharge duct passes through the inside of described air-water heat exchanger (6), to carry out heat exchange.
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| CN201620839083.8U CN205979843U (en) | 2016-08-04 | 2016-08-04 | Pretreatment systems of high sodium coal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287782A (en) * | 2016-08-04 | 2017-01-04 | 中国神华能源股份有限公司 | The pretreatment system of high sodium coal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106287782A (en) * | 2016-08-04 | 2017-01-04 | 中国神华能源股份有限公司 | The pretreatment system of high sodium coal |
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