CN207945929U - A kind of device for drying raw coal using the double waste heats in power station - Google Patents
A kind of device for drying raw coal using the double waste heats in power station Download PDFInfo
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- CN207945929U CN207945929U CN201721816252.7U CN201721816252U CN207945929U CN 207945929 U CN207945929 U CN 207945929U CN 201721816252 U CN201721816252 U CN 201721816252U CN 207945929 U CN207945929 U CN 207945929U
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Abstract
The utility model is related to a kind of devices for drying raw coal using the double waste heats in power station.Raw coal is the raw material that station boiler is used to produce electric energy, and initial raw coal water content is generally higher, particularly lignite, and moisture content directly enters the stability that extreme influence is burnt in stove burning up to 30% or more, is dried the station service power consumption rate loss that power station will be significantly greatly increased.The utility model includes the dry deslagging residual heat collection system of boiler, fume afterheat ancillary drier system and swinging raw coal drying system；The dry deslagging residual heat collection system of boiler and fume afterheat ancillary drier system are connect with swinging raw coal drying system.The utility model fully recycles the waste heat sensible heat of boiler dry dreg removing system lime-ash and boiler tail flue gas, rotary drying is used for the raw coal of thermoelectricity production, the moisture content of as-fired coal is greatly reduced, reduce gasification latent heat loss of raw coal during hearth combustion, reduce deslagging temperature and exhaust gas temperature simultaneously, heat loss due to sensible heat in slag and heat loss due to exhaust gas are reduced, boiler efficiency is improved.
Description
Technical field
The utility model is related to a kind of devices for drying raw coal using the double waste heats in power station, are mainly used in dry dreg removing system electricity
The depth of boiler afterheat of standing recycles, and is suitable for the electric power station system that raw coal water content is high and exhaust gas temperature is higher.
Background technology
Currently, the deslagging of Large-scale fire-electricity unit mostly uses mechanical residue extraction mechanism both at home and abroad.Mechanical residue extraction mechanism can be divided into
Two kinds of wet type slag extractor and dry-type slag extractor.Wherein, wet type dreg removing system can by the thermal loss of uncompleted burned carbon in slag in water,
It causes energy loss, reduces species activity in slag, and water consumption is higher etc..Dry Slag Removal System is the furnace bottom on cooling conveyer belt
Slag simultaneously continues to after-flame, and under conveyer belt and deslagging chain-drive section is equipped with blast pipe, using the air draught on the spot of negative pressure in stove, recycles slag
Heat, system is not necessarily to cooling water, and the substances such as calcium oxide in Dry Slag Removal System slag are not destroyed, slag for comprehensive utilization rate
It is high.However Dry Slag Removal System slag temperature after cooling, still at 100 DEG C or more, there are still certain heat loss due to sensible heat in slag.
In station boiler heat loss, another bigger loss is flue gas loss, accounts for about entire boiler hot
The 7% to 8% of loss.Under the premise of not influencing back-end ductwork safety, exhaust gas temperature is reduced, is conducive to recycle heat loss, carry
High boiler efficiency.However under existing service condition, how higher discharge smoke temperature of power station boiler is, causes certain heat loss due to exhaust gas.
Raw coal is the raw material that station boiler is used to produce electric energy, and initial raw coal water content is generally higher, particularly lignite,
Moisture content directly enters stove and burns stability that extreme influence burn up to 30% or more, reduces calorific value, gasification latent heat lose compared with
It is more.However, additional raw coal, especially lignite, the dry station service power consumption rate loss that power station will be significantly greatly increased, such as application No. is
The Chinese patent of CN201210215491.2.
Utility model content
The purpose of the utility model is to overcome above-mentioned deficiencies existing in the prior art, and provide a kind of reasonable design
The device of raw coal is dried using the double waste heats in power station, this makes full use of the dry deslagging of boiler using the device that the double waste heats in power station dry raw coal
It is latent to reduce gasification of raw coal during hearth combustion for two kinds of waste heat sensible heats of system lime-ash and boiler tail flue gas, dry raw coal
Heat loss, while deslagging temperature and exhaust gas temperature are reduced, improve boiler efficiency.
The technical scheme in the invention for solving the above technical problem is：It is a kind of to dry raw coal using the double waste heats in power station
Device, including the dry deslagging residual heat collection system of boiler, fume afterheat ancillary drier system and swinging raw coal drying system；It is described
The dry deslagging residual heat collection system of boiler and fume afterheat ancillary drier system are connect with swinging raw coal drying system；Its feature
It is：
The dry deslagging residual heat collection system of boiler includes boiler slag-cooling bucket, dry-type slag extractor, dry slag header and air-supply wind
Machine；The boiler slag-cooling bucket is arranged is provided with conveyer belt in the top of the feed inlet of dry-type slag extractor, the dry-type slag extractor,
The dry slag header is arranged in the lower section of the discharge port of dry-type slag extractor, and the breeze fan is arranged in the side of dry slag header,
The air outlet of the breeze fan is connected to by pipeline with the air inlet of dry slag header；
The fume afterheat ancillary drier system includes boiler back end ductwork and air inducing wind turbine；The boiler back end ductwork
Exhanst gas outlet is connected to by pipeline with the air-vent of air inducing wind turbine；
The swinging raw coal drying system includes that rotating cylinder, raw coal entrance, hot-wind inlet, hot-blast outlet and raw coal go out
Mouthful；The rotating cylinder is tubular structure, and the rotating cylinder is in tilted layout, and one end of the rotating cylinder is higher than rotating cylinder
The other end, the hot-blast outlet and raw coal entrance be arranged in one end of the rotating cylinder, and the hot-wind inlet and raw coal go out
The other end in the rotating cylinder, the air outlet and air inducing wind turbine that the hot-wind inlet passes through pipeline and dry slag header is arranged in mouth
Air outlet connection；The rotating cylinder is internally provided with shovelling plate device, and the outside of the rotating cylinder is provided with support roller.Structure
Simply, reasonable design.
Furthermore, the dry slag header is body structure.
Furthermore, the air inlet of the dry slag header is arranged in the lower part of dry slag header, and the dry slag header goes out
Air port is arranged on the top of dry slag header.Air inlet and air outlet are located on two opposite side panels, and cold wind is from lower part
Air inlet enters in dry slag header, more abundant with the Boiler Furnace bottom clinker heat exchange of heat, and is discharged from top air outlet.
Furthermore, the device using the double waste heats drying raw coal in power station further includes coal feeder, and the raw coal goes out
Mouth is connect with coal feeder.The higher raw coal of water content is exported after drying from raw coal in swinging raw coal drying system and is arranged
Go out, into coal feeder.
A method of drying raw coal using the double waste heats in power station, it is characterised in that：The method uses profit as described above
The device of raw coal is dried with the double waste heats in power station, the method is as follows：
Boiler Furnace bottom clinker is entered by boiler slag-cooling bucket in dry-type slag extractor, and is delivered to dried slag removing by conveyer belt
The discharge port of machine is fallen into later in dry slag header；It opens breeze fan to be blowed, cold wind is entered dry by the bottom of dry slag header
In slag header, and contacted with Boiler Furnace bottom clinker, the cold wind by heat exchange become hot wind, and by the air outlet of dry slag header into
Enter in swinging raw coal drying system；
Meanwhile air inducing wind turbine is opened, the flue gas in boiler back end ductwork is introduced into swinging raw coal drying system；
In swinging raw coal drying system, raw coal is entered by raw coal entrance in rotating cylinder, starts driving device, revolution
Cylinder is rotated under the drive of support roller；Raw coal is disperseed in rotating cylinder by shovelling plate device, and with rotating cylinder
It is moved；The flue gas being discharged in the hot wind and fume afterheat ancillary drier system that are discharged in the dry deslagging residual heat collection system of boiler
Converge and entered in rotating cylinder by hot-wind inlet jointly, and contact and be dried with raw coal, is finally discharged from hot-blast outlet；It is dry
Raw coal after dry is exported by raw coal to be discharged, and enters coal feeder.It is easy to operate, hot wind and flue gas converge after by rotating cylinder
Bottom enters, and forms reverse impact type with raw coal and contacts, and contact is more abundant, and the drying effect of raw coal is good, by dry
Stabilization is burnt after raw coal enters stove.
Furthermore, the support roller is driven by motor.Revolution is adjustable.
The utility model compared with prior art, has the following advantages and effect：
1. the utility model is dried raw coal using surplus heat of power plant, the moisture content of as-fired coal is greatly reduced, stablizes combustion
It burns, reduces heat waste.
2. the utility model dries the waste heat of raw coal from two kinds of the dry deslagging of boiler and tail flue gas, recycling is low-quality
Heat, while deslagging heat waste and exhaust gas heat loss are reduced, improve stove effect.
3. helicoid rotating cylinder structure is conducive to the rapid draing of raw coal, heat and mass is efficient, and rotating cylinder turns
Speed is adjustable, and drying regime is controllable.
4. system structure is simple, simple, convenient, comprehensive utilization of energy rate is high.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model embodiment.
Fig. 2 is the swinging raw coal drying system structural schematic diagram of the utility model embodiment.
In figure：Boiler slag-cooling bucket 1, dry-type slag extractor 2, dry slag header 3, breeze fan 4, boiler back end ductwork 5, air inducing wind
Machine 6, rotating cylinder 7, raw coal entrance 8, hot-wind inlet 9, hot-blast outlet 10, raw coal outlet 11, support roller 12, coal feeder 13.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
Referring to Fig. 1 to Fig. 2, a kind of device for drying raw coal using the double waste heats in power station, including the dry deslagging residual heat collection of boiler
System, fume afterheat ancillary drier system and swinging raw coal drying system；More than the dry deslagging residual heat collection system of boiler and flue gas
Heat assisted drying system is connect with swinging raw coal drying system.
The dry deslagging residual heat collection system of boiler includes boiler slag-cooling bucket 1, dry-type slag extractor 2, dry slag header 3 and breeze fan
4；Boiler slag-cooling bucket 1, which is arranged in the top of the feed inlet of dry-type slag extractor 2, dry-type slag extractor 2, is provided with conveyer belt, dry slag collection
Case 3 is arranged in the lower section of the discharge port of dry-type slag extractor 2, and dry slag header 3 is body structure, and breeze fan 4 is arranged in dry slag collection
The air outlet of the side of case 3, breeze fan 4 is connected to by pipeline with the air inlet of dry slag header 3, the air outlet of dry slag header 3
It is connected to swinging raw coal drying system by pipeline；The air inlet of dry slag header 3 is arranged in the lower part of dry slag header 3, dry slag
The air outlet of header 3 is arranged on the top of dry slag header 3.
Fume afterheat ancillary drier system includes boiler back end ductwork 5 and air inducing wind turbine 6；The flue gas of boiler back end ductwork 5
Outlet is connected to by pipeline with the air-vent of air inducing wind turbine 6.
Swinging raw coal drying system includes rotating cylinder 7, raw coal entrance 8, hot-wind inlet 9, hot-blast outlet 10 and raw coal
Outlet 11；Rotating cylinder 7 is tubular structure, and rotating cylinder 7 is in tilted layout, and one end of rotating cylinder 7 is another higher than rotating cylinder 7
One end, hot-blast outlet 10 and raw coal entrance 8 are arranged in one end of rotating cylinder 7, and hot-wind inlet 9 and 11 setting of raw coal outlet are being returned
The other end of drum body 7, hot-wind inlet 9 are connected to by pipeline with the air outlet of the air outlet of dry slag header 3 and air inducing wind turbine 6；
Rotating cylinder 7 is internally provided with shovelling plate device, and the outside of rotating cylinder 7 is provided with support roller 12.
Can also include coal feeder 13 in the utility model, raw coal outlet 11 is connect with coal feeder 13.
A method of raw coal being dried using the double waste heats in power station, uses the dress as above for drying raw coal using the double waste heats in power station
It sets, method is as follows：
Boiler Furnace bottom clinker is entered by boiler slag-cooling bucket 1 in dry-type slag extractor 2, and is delivered to dry type row by conveyer belt
The discharge port of slag machine 2 is fallen into later in dry slag header 3；Open breeze fan 4 be blowed, cold wind by dry slag header 3 bottom
It is contacted into dry slag header 3, and with Boiler Furnace bottom clinker, the cold wind by heat exchange becomes hot wind, and by dry slag header 3
Air outlet enters in swinging raw coal drying system；
Meanwhile air inducing wind turbine 6 is opened, the flue gas in boiler back end ductwork 5 is introduced into swinging raw coal drying system；
In swinging raw coal drying system, raw coal is entered by raw coal entrance 8 in rotating cylinder 7, starts motor, motor band
Moving gear drives to the acting of support roller 12, and rotating cylinder 7 is rotated under the drive of support roller 12；Raw coal leads in rotating cylinder 7
It crosses shovelling plate device to be disperseed, and as rotating cylinder 7 is moved；The hot wind that is discharged in the dry deslagging residual heat collection system of boiler and
The flue gas being discharged in fume afterheat ancillary drier system converges and is entered in rotating cylinder 7 by hot-wind inlet 9 jointly, and and raw coal
Contact is dried, and is finally discharged from hot-blast outlet 10；Raw coal after drying enters coal feeder by 11 discharge of raw coal outlet
13。
The device for drying raw coal using the double waste heats in power station fully recycles the dry dreg removing system lime-ash of boiler and boiler tail
The waste heat sensible heat of flue gas, rotary drying are used for the raw coal of thermoelectricity production, the especially lignite of high-moisture, as-fired coal are greatly reduced
Moisture content, reduce gasification latent heat loss of raw coal during hearth combustion, while reducing deslagging temperature and exhaust gas temperature, subtract
Few heat loss due to sensible heat in slag and heat loss due to exhaust gas, improve boiler efficiency, realize the recycling of low grade heat energy, energy synthesis profit
With rate height.
Although the utility model is disclosed as above with embodiment, it is not limited to the scope of protection of the utility model,
Any technical staff for being familiar with this technology, in the conception and scope for not departing from the utility model made by change and retouch,
It all should belong to the protection range of the utility model.
Claims (4)
1. a kind of device for drying raw coal using the double waste heats in power station, including the dry deslagging residual heat collection system of boiler, fume afterheat are auxiliary
Help drying system and swinging raw coal drying system；The dry deslagging residual heat collection system of the boiler and the dry system of fume afterheat auxiliary
System is connect with swinging raw coal drying system；It is characterized in that：
The dry deslagging residual heat collection system of boiler includes boiler slag-cooling bucket, dry-type slag extractor, dry slag header and breeze fan；Institute
It states boiler slag-cooling bucket and is arranged and be provided with conveyer belt in the top of the feed inlet of dry-type slag extractor, the dry-type slag extractor, it is described
Dry slag header is arranged in the lower section of the discharge port of dry-type slag extractor, and the breeze fan is arranged in the side of dry slag header, described
The air outlet of breeze fan is connected to by pipeline with the air inlet of dry slag header；
The fume afterheat ancillary drier system includes boiler back end ductwork and air inducing wind turbine；The flue gas of the boiler back end ductwork
Outlet is connected to by pipeline with the air-vent of air inducing wind turbine；
The swinging raw coal drying system includes rotating cylinder, raw coal entrance, hot-wind inlet, hot-blast outlet and raw coal outlet；
The rotating cylinder is tubular structure, and the rotating cylinder is in tilted layout, and one end of the rotating cylinder is higher than rotating cylinder
The other end, the hot-blast outlet and raw coal entrance are arranged in one end of the rotating cylinder, the hot-wind inlet and raw coal outlet
The other end in the rotating cylinder is set, and the hot-wind inlet passes through the air outlet and air inducing wind turbine of pipeline and dry slag header
Air outlet is connected to；The rotating cylinder is internally provided with shovelling plate device, and the outside of the rotating cylinder is provided with support roller.
2. the device according to claim 1 for drying raw coal using the double waste heats in power station, it is characterised in that：The dry slag header
For body structure.
3. the device according to claim 1 for drying raw coal using the double waste heats in power station, it is characterised in that：The dry slag header
Air inlet be arranged in the lower part of dry slag header, the air outlet of the dry slag header is arranged on the top of dry slag header.
4. the device according to claim 1 for drying raw coal using the double waste heats in power station, it is characterised in that：It is described to utilize power station
The device of double waste heat drying raw coal further includes coal feeder, and the raw coal outlet is connect with coal feeder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721816252.7U CN207945929U (en) | 2017-12-22 | 2017-12-22 | A kind of device for drying raw coal using the double waste heats in power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721816252.7U CN207945929U (en) | 2017-12-22 | 2017-12-22 | A kind of device for drying raw coal using the double waste heats in power station |
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| CN207945929U true CN207945929U (en) | 2018-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721816252.7U Active CN207945929U (en) | 2017-12-22 | 2017-12-22 | A kind of device for drying raw coal using the double waste heats in power station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036605A (en) * | 2017-12-22 | 2018-05-15 | 华电电力科学研究院 | A kind of device and method using the double waste heat drying raw coal in power station |
| CN111649347A (en) * | 2020-06-19 | 2020-09-11 | 陕西科技大学 | Environment-friendly automatic slag discharging device for decoupling coal-fired hot-blast stove |
-
2017
- 2017-12-22 CN CN201721816252.7U patent/CN207945929U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036605A (en) * | 2017-12-22 | 2018-05-15 | 华电电力科学研究院 | A kind of device and method using the double waste heat drying raw coal in power station |
| CN111649347A (en) * | 2020-06-19 | 2020-09-11 | 陕西科技大学 | Environment-friendly automatic slag discharging device for decoupling coal-fired hot-blast stove |
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