CN110207104A - A kind of outer fossil fuel of furnace burns preceding pretreatment unit - Google Patents
A kind of outer fossil fuel of furnace burns preceding pretreatment unit Download PDFInfo
- Publication number
- CN110207104A CN110207104A CN201910448082.9A CN201910448082A CN110207104A CN 110207104 A CN110207104 A CN 110207104A CN 201910448082 A CN201910448082 A CN 201910448082A CN 110207104 A CN110207104 A CN 110207104A
- Authority
- CN
- China
- Prior art keywords
- coal
- pretreatment
- pretreatment chamber
- fossil fuel
- circulating ash
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/24—Devices for removal of material from the bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
- F23K1/04—Heating fuel prior to delivery to combustion apparatus
Abstract
The invention discloses fossil fuels outside a kind of furnace to burn preceding pretreatment unit, it is related to coal grain and is crushed field of combustion technology, it includes boiler body and the cyclone separator that is attached thereto, the bottom of the cyclone separator is connected with circulating ash down-pipe, material returning valve is installed on circulating ash down-pipe, circulating ash down-pipe is connect with pretreatment chamber, pretreatment chamber is equipped with feed inlet, coal grain fluidizer is also equipped in the pretreatment chamber, air inlet corresponding with coal grain fluidizer is also connected with outside pretreatment chamber, the pretreatment chamber also passes through coal finished product discharge nozzle and connect with boiler body, the beneficial effects of the present invention are: preheating new coal using high-temp circulating ash, keep new pyrolysis of coal broken, realize the refinement of coal grain, be conducive to the preheating of coal grain, dehumidifying, and coal grain pollutant pre-corrosion.
Description
Technical field
The present invention relates to coal grains to be crushed field of combustion technology, and the outer fossil fuel of specifically a kind of furnace burns preceding pretreatment unit.
Background technique
China's low-quality coal resources reserves are big, and calorific value is low, these low calorific value coals due to ash content is high, calorific value is low, as
Fuel applications it is few, be used for generate electricity a big chunk coal be not fully utilized, cause boiler operating efficiency low,
Economic benefits are poor.Such as existing bone coal resource, reserves reach 618.8 hundred million tons or so, but exist to be difficult to be crushed and wear and refer to
The big characteristic of number, grain graininess is big, energy consumption is high after being crushed using Mechanical Crushing mode, boiler efficiency decline, crushing plant abrasion
Seriously, cost of investment increases, shattering process noise is big, dust is big.
In conjunction with existing circulation fluidized-bed combustion boiler and Mechanical Crushing mode there are the problem of and fluidized bed furnace and fluidized bed
Boiler characteristics propose a kind of outer fossil fuel of furnace and burn preceding pretreatment unit.
Summary of the invention
The purpose of the present invention is to provide fossil fuels outside a kind of furnace to burn preceding pretreatment unit, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the invention provides the following technical scheme:
A kind of outer fossil fuel of furnace burns preceding pretreatment unit, including boiler body and the cyclone separator being attached thereto, the rotation
The bottom of wind separator is connected with circulating ash down-pipe, is equipped with material returning valve on circulating ash down-pipe, circulating ash down-pipe and pre-
Process chamber connection, pretreatment chamber are equipped with feed inlet, are also equipped with coal grain fluidizer in the pretreatment chamber, outside pretreatment chamber
It is also connected with air inlet corresponding with coal grain fluidizer, the pretreatment chamber also passes through coal finished product discharge nozzle and boiler body connects
It connects.
As a further solution of the present invention: the boiler body has the burner hearth dilute-phase zone straight section and bubbling being distributed up and down
Diffuser.
As further scheme of the invention: the pretreatment chamber is by gas and lighter products export and boiler body
Or gas processing device connection.
As the present invention further scheme: the pretreatment chamber and boiler body are wholely set or independently of each other.
As further scheme of the invention: being additionally provided with coarse coal in the pretreatment chamber and exclude mechanism.
As further scheme of the invention: being equipped in the pretreatment chamber and pre-processed for promoting high-temp circulating ash
The flying dust baffle of indoor residence time.
As further scheme of the invention: being passed through high-temperature flue gas in the air inlet, the air inlet passes through pipe
The connection of the exhaust outlet of road and cyclone separator.
As further scheme of the invention: the side of the pretreatment chamber is equipped with air distribution plate.
Compared with prior art, the beneficial effects of the present invention are: (1) preheats new coal using high-temp circulating ash, make new coal heat
Solution is broken；(2) be conducive to carry out coal grain exsiccation, and removal coal grain pollutant；(3) abrasion of mechanical equipment can be solved
Problem improves crushing plant service life, reduces cost of investment；(4) reduction ratio is high, and partial size is small after coal is broken, improves bone coal combustion
Characteristic is burnt, kindling is fast, improves boiler combustion efficiency, increases economic efficiency；(5) coal grain is conducive to reduce energy consumption into furnace after refining,
Reduce operating cost；(6) relative to Mechanical Crushing, noise is small, and dust is small, and working environment is good；(7) it is suitable for various furnace shapes,
It is arranged and fixed conveniently, it is simple and convenient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram (pants furnace) of pretreatment unit before a kind of outer fossil fuel of furnace is burnt.
Fig. 2 is the structural schematic diagram (common furnace) of pretreatment unit before a kind of outer fossil fuel of furnace is burnt.
Fig. 3 is the structural schematic diagram of pretreatment chamber in pretreatment unit before a kind of outer fossil fuel of furnace is burnt.
Fig. 4 is the top view of pretreatment chamber in pretreatment unit before a kind of outer fossil fuel of furnace is burnt.
In figure: 100- boiler body, 101- burner hearth dilute-phase zone straight section, 102- be bubbled diffuser, 200- cyclone separator,
201- material returning valve, 202- circulating ash down-pipe, 300- pretreatment chamber, 301- coal grain fluidizer, 302- gas and lighter products
Outlet, 303- coal finished product discharge nozzle, 304- feed inlet, 305- air inlet, 306- air distribution plate.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all implementations consistent with this disclosure.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects disclosed in the present embodiment are consistent.
Embodiment 1
Please refer to Fig. 1~4, in the embodiment of the present invention, a kind of outer fossil fuel of furnace burns preceding pretreatment unit, including boiler body
100 and the cyclone separator 200 that is attached thereto, in order to realize that fractional combustion, boiler body 100 have the burner hearth being distributed up and down dilute
Phase region straight section 101 and bubbling diffuser 102, the bottom of the cyclone separator 200 are connected with circulating ash down-pipe 202, certainly,
Material returning valve 201 is installed, herein, circulating ash down-pipe 202 is used to separate cyclone separator 200 on circulating ash down-pipe 202
Cigarette ash (i.e. high-temp circulating ash) out is collected, and circulating ash down-pipe 202 is connect with pretreatment chamber 300, pretreatment chamber 300
It is equipped with feed inlet 304, for inputting new coal into pretreatment chamber 300, when high-temp circulating ash and new coal are in pretreatment chamber 300
After being mixed, new coal and the high-temp circulating ash of cold conditions exchange heat, and new coal surface is brought rapidly up, since new coal itself is existing
Thermal resistance makes its surface and internal generation temperature gradient, and change of gradient occurs so as to cause thermal stress, when thermal stress is more than new coal sheet
When body material yield strength, it can be cracked based on internal fine pore, while as new coal internal temperature reaches
After certain value, volatile matter starts to be precipitated outward, and since new texture of coal is fine and close, precipitate is difficult to be precipitated in time, causes precipitate collection
It is poly-, the biggish bulbs of pressure are generated, new coal internal pressure can be made to increase, the primary fragmentation of new coal is exacerbated, lead to internal pressure
It further increases, thermal stress is caused further to concentrate, due to the increase of swelling stress, further increase crackle, when expansion is answered
When power is greater than material stress, new coal can fragmentation refinement；Certainly coal grain fluidizer is also equipped in pretreatment chamber 300 herein
301, pretreatment chamber 300 is also connected with air inlet 305 corresponding with coal grain fluidizer 301 outside, for being fluidized to new coal,
New coal after fragmentation is refined simultaneously is sent in boiler body 100 together with high-temp circulating ash, and pretreatment chamber 300 passes through gas
It is connect with lighter products outlet 302 with boiler body 101；And the pretreatment chamber 300 be wholely set with boiler body 100 or
Independently of each other.
Certainly, for further, the pretreatment chamber 300 is also connected by coal finished product discharge nozzle 303 and boiler body 100
It connects, specifically, coal finished product discharge nozzle 303 can be connect with the bubbling diffuser 102 of boiler body 100, in practical application, newly
The small-particle coal obtained after coal refinement can be blown into boiler through gas and lighter products outlet 302 together with high-temp circulating ash
In ontology 100, and part larger particles coal can be entered in boiler body 100 by this coal finished product discharge nozzle 303, in boiler
It further heated up, burst and is refined in ontology 100, certainly, herein when pretreatment chamber 300 also passes through coal finished product discharge nozzle
After 303 connect with boiler body 100, since coal charge can generate some pollutants after preheat, gas goes out with lighter products
Mouth 302 can also be connect with gas processing device, carry out the operations such as depositing dust, heat exchange, depending on actual use situation.
However, particle is larger after a small number of new coals that may be present can not be refined or be refined, it is not able to satisfy into pot
Particle size requirements in furnace body 100 are additionally provided with coarse coal in the pretreatment chamber 300 and exclude mechanism, periodically by pretreatment chamber 300
Interior coarse coal sweeps out pretreatment chamber 300, certainly, can also be used by increasing slag-drip opening in the bottom of pretreatment chamber 300
Mode excludes coarse coal (it can be slag-drip opening that i.e. coarse coal, which excludes mechanism), and for easily broken coal, the present embodiment can not also
Coarse coal is set and excludes mechanism.
Boiler body 100 in the present embodiment not only can be pants furnace shape, but also can be common furnace shape, specifically can be with
According to for use demand determine.
Embodiment 2
Please refer to Fig. 3~4, in the embodiment of the present invention, a kind of outer fossil fuel of furnace burns preceding pretreatment unit, in order to promote new coal
Heat exchange or heat exchange effect to enable new coal preferably to refine, and are equipped in the pretreatment chamber 300 and follow for promoting high temperature
The flying dust baffle of ring ash residence time in pretreatment chamber 300 helps to realize the accumulation of heat, strengthens heat exchange effect, flies
The quantity of grey baffle can be multiple, it is only necessary to can slow down the movement velocity of high-temp circulating ash, herein not to flying dust baffle
Construction and arrangement mode be specifically described.
In addition, temperature is lower, is unfavorable for due to the fresh air that coal grain fluidizer 301 uses air inlet 305 to enter
The hot environment for keeping pretreatment chamber 300, causes influence to the refinement of new coal, therefore, the air inlet 305 has been passed through high temperature
Flue gas, specifically, the air inlet 305 can be connect by pipeline with the exhaust outlet of cyclone separator 200, it is necessary can
To increase filter device on pipeline, to exclude some little particle impurity etc., the high-temperature flue gas of the discharge of cyclone separator 200 is utilized
New coal is fluidized, is conducive to refine coal grain, dehumidifying.
Meanwhile the present embodiment is equipped with air distribution plate 306 in the side of the pretreatment chamber 300, for into pretreatment chamber 300
Wind-force is inputted, to guarantee that the air volume adjustment in pretreatment chamber 300 is uniform, new coal and high-temp circulating ash after being conducive to refinement enter
Into boiler body 100, wind regime used in air distribution plate 306 is also possible to above-mentioned high-temperature flue gas.It is pre- to locate for easily broken coal
Reason can also be not provided with air distribution plate 306 in room 300.
It should be strongly noted that external pretreatment chamber 300 is able to achieve new coal and high-temp circulating ash in the technical program
Heat exchange, keep new pyrolysis of coal broken, woth no need to by mechanical crushing equipment, while this mode is also able to achieve the dehumidifying to coal grain
Effect, achieves many things at one stroke, and reduction ratio is high, and partial size is small after coal is broken, improves stone coal combustion characteristic, and kindling is fast, improves boiler combustion effect
Rate is increased economic efficiency；Coal grain is conducive to bone coal and enters furnace after refinement, reduces energy consumption, reduces operating cost；The pretreatment of furnace outer fuel
Coal grain is refined relative to Mechanical Crushing, noise is small, and dust is small, and working environment is good；Suitable for various furnace shapes, fixation side is installed
Just, simple and convenient.
Those skilled in the art will readily occur to other realities of the disclosure after considering the disclosure at specification and embodiment
Apply scheme.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or suitable
The variation of answering property follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure or used
Use technological means.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are referred to by claim
Out.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by the accompanying claims.
Claims (8)
1. a kind of outer fossil fuel of furnace burns preceding pretreatment unit, including cyclone separator boiler body (100) and be attached thereto
(200), the bottom of the cyclone separator (200) is connected with circulating ash down-pipe (202), and circulating ash down-pipe is pacified on (202)
Equipped with material returning valve (201), which is characterized in that circulating ash down-pipe (202) is connect with pretreatment chamber (300), pretreatment chamber (300)
It is equipped with feed inlet (304), is also equipped with coal grain fluidizer (301), pretreatment chamber (300) in the pretreatment chamber (300)
It is also connected with air inlet (305) corresponding with coal grain fluidizer (301) outside, the pretreatment chamber (300) also passes through coal finished product
Discharge nozzle (303) is connect with boiler body (100).
2. a kind of outer fossil fuel of furnace according to claim 1 burns preceding pretreatment unit, which is characterized in that the boiler sheet
Body (100) has the burner hearth dilute-phase zone straight section (101) being distributed up and down and is bubbled diffuser (102).
3. a kind of outer fossil fuel of furnace according to claim 1 burns preceding pretreatment unit, which is characterized in that the pretreatment
Room (300) is connect by gas with lighter products outlet (302) with boiler body (100) or gas processing device.
4. a kind of outer fossil fuel of furnace according to claim 1 burns preceding pretreatment unit, which is characterized in that the pretreatment
Room (300) and boiler body (100) are wholely set or independently of each other.
5. a kind of outer fossil fuel of furnace according to claim 1 or 2 or 3 or 4 burns preceding pretreatment unit, which is characterized in that
It is additionally provided with coarse coal in the pretreatment chamber (300) and excludes mechanism.
6. a kind of outer fossil fuel of furnace according to claim 5 burns preceding pretreatment unit, which is characterized in that the pretreatment
It is equipped in room (300) for promoting high-temp circulating ash in the flying dust baffle of pretreatment chamber (300) interior residence time.
7. a kind of outer fossil fuel of furnace described according to claim 1 or 2 or 3 or 4 or 6 burns preceding pretreatment unit, feature exists
In the air inlet (305) is interior to be passed through high-temperature flue gas, and the air inlet (305) passes through pipeline and cyclone separator (200)
Exhaust outlet connection.
8. a kind of outer fossil fuel of furnace according to claim 7 burns preceding pretreatment unit, which is characterized in that the pretreatment
The side of room (300) is equipped with air distribution plate (306).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910448082.9A CN110207104A (en) | 2019-05-27 | 2019-05-27 | A kind of outer fossil fuel of furnace burns preceding pretreatment unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910448082.9A CN110207104A (en) | 2019-05-27 | 2019-05-27 | A kind of outer fossil fuel of furnace burns preceding pretreatment unit |
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| CN110207104A true CN110207104A (en) | 2019-09-06 |
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| CN201910448082.9A Pending CN110207104A (en) | 2019-05-27 | 2019-05-27 | A kind of outer fossil fuel of furnace burns preceding pretreatment unit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0552305A (en) * | 1991-08-20 | 1993-03-02 | Mitsui Eng & Shipbuild Co Ltd | Method of reducing nitrogen oxide in circulation type fluidized bed boiler |
| CN1884913A (en) * | 2005-06-21 | 2006-12-27 | 中国科学院工程热物理研究所 | Wet sludge drying and incinerating treatment method employing circulating fluidized bed with combined dryer |
| CN201462777U (en) * | 2009-07-11 | 2010-05-12 | 河北新能电力有限公司 | Circulating fluidize bed coal firing boiler capable of combusting biomass fuel |
| CN102864674A (en) * | 2012-09-17 | 2013-01-09 | 哈尔滨工业大学 | Device and method for recycling gasified and burned alkali for straw pulp papermaking black liquor circulating fluidized bed |
| CN203099809U (en) * | 2013-03-04 | 2013-07-31 | 华北电力大学 | Circulating fluidized bed boiler |
| CN103884013A (en) * | 2014-03-26 | 2014-06-25 | 东方电气集团东方锅炉股份有限公司 | Combustion method and device of coupled environment-friendly fluidized bed boiler |
-
2019
- 2019-05-27 CN CN201910448082.9A patent/CN110207104A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0552305A (en) * | 1991-08-20 | 1993-03-02 | Mitsui Eng & Shipbuild Co Ltd | Method of reducing nitrogen oxide in circulation type fluidized bed boiler |
| CN1884913A (en) * | 2005-06-21 | 2006-12-27 | 中国科学院工程热物理研究所 | Wet sludge drying and incinerating treatment method employing circulating fluidized bed with combined dryer |
| CN201462777U (en) * | 2009-07-11 | 2010-05-12 | 河北新能电力有限公司 | Circulating fluidize bed coal firing boiler capable of combusting biomass fuel |
| CN102864674A (en) * | 2012-09-17 | 2013-01-09 | 哈尔滨工业大学 | Device and method for recycling gasified and burned alkali for straw pulp papermaking black liquor circulating fluidized bed |
| CN203099809U (en) * | 2013-03-04 | 2013-07-31 | 华北电力大学 | Circulating fluidized bed boiler |
| CN103884013A (en) * | 2014-03-26 | 2014-06-25 | 东方电气集团东方锅炉股份有限公司 | Combustion method and device of coupled environment-friendly fluidized bed boiler |
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Application publication date: 20190906 |