CN108679988A - A kind of non-direct contact lignite drying unit and stoving process - Google Patents
A kind of non-direct contact lignite drying unit and stoving process Download PDFInfo
- Publication number
- CN108679988A CN108679988A CN201810586741.0A CN201810586741A CN108679988A CN 108679988 A CN108679988 A CN 108679988A CN 201810586741 A CN201810586741 A CN 201810586741A CN 108679988 A CN108679988 A CN 108679988A
- Authority
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- China
- Prior art keywords
- lignite
- drying box
- flue gas
- gas
- drying
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/003—Supply-air or gas filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a kind of non-direct contact lignite drying units, including incinerator, drying box, flue gas purification system and chimney, the exhanst gas outlet of the incinerator and the air inlet of drying box connect, the gas outlet of the drying box is connect with flue gas purification system, lignite conveying mechanism is provided in the drying box, the conveying direction of the lignite is opposite with the flow direction of flue gas in drying box, and the flue gas non-direct contact in the lignite and drying box, the outlet end of the flue gas purification system is divided into two gas circuits, wherein a gas circuit is connect by air-introduced machine with chimney, another gas circuit is by returning to wind turbine and the piping connection that connect incinerator and drying box.The present invention is dried by continuously entering the lignite of high moisture percentage in drying box, during the drying process using with by the way of flue gas non-direct contact type, and flue-gas temperature can effectively be adjusted according to lignite moisture percentage and treating capacity, to improve efficiency, quality and safety to brown coal drying.
Description
Technical field
The invention belongs to coal chemical industry, technical field of electric power, more particularly to a kind of non-direct contact lignite drying unit and baking
Dry technique.
Background technology
Lignite is huge in whole world reserves, price also relative moderate, thus is often used as in coal chemical technology or power plant
Raw material or fuel, but since lignite degree of metamorphism is shallower, the moisture typically contained is all bigger（Especially interior water content is high）, heat
It is worth low, utilization is more difficult, it is therefore desirable to which drying and processing is carried out to lignite.
In existing lignite stoving process the main problems are as follows：1, brown moisture in coal is still very high after drying；
2, easily there is auto-ignition in lignite in drying course；3, stoving process processing capacity is limited, generally requires a plurality of baking of parallel configuration
Main line；4, when lignite water content changes greatly, stoving process adjustment difficulty is larger；5, the discharge gas generated in drying course is straight
Run in into air, to environmental effects.
Invention content
It is an object of the invention to：In view of the above problems, lignite can be carried out safely, effectively by providing one kind
Dry non-direct contact lignite drying unit and stoving process.
The technical proposal of the invention is realized in this way：A kind of non-direct contact lignite drying unit, it is characterised in that：Packet
Incinerator, drying box, flue gas purification system and chimney are included, the incinerator is used to generate high-temperature flue gas, the incinerator
Exhanst gas outlet and the air inlet of drying box connect, and the gas outlet of the drying box is connect with flue gas purification system, in the drying
It is provided with lignite conveying mechanism in case, the flow direction of flue gas is on the contrary, and described in the conveying direction and drying box of the lignite
Lignite and the flue gas non-direct contact in drying box, the outlet end of the flue gas purification system is divided into two gas circuits, wherein one
Gas circuit is connect by air-introduced machine with chimney, and another gas circuit is connected by returning to wind turbine with the pipeline for connecting incinerator and drying box
It connects.
Non-direct contact lignite drying unit of the present invention, the incinerator are provided with fuel gas inlet and burning
The combustion air inlet of air intlet, the incinerator is connect with combustion fan.
Non-direct contact lignite drying unit of the present invention, the drying box is provided with row's bleeder holes, described
Row's bleeder holes of drying box setting are connect by exhaust gas fan with incinerator.
Non-direct contact lignite drying unit of the present invention, the drying box are board-like drying box, the high temperature
Flue gas flows in board-like drying box in independent gas passage, and the lignite is by lignite conveying mechanism in board-like drying box
Conveying in babinet.
Non-direct contact lignite drying unit of the present invention, filled with lazy in the babinet of the board-like drying box
Property gas.
A kind of stoving process using above-mentioned non-direct contact lignite drying unit, it is characterised in that：Include the following steps：
a）Fuel gas A and the burning air B after combustion fan pressurizes enter incinerator, obtain high-temperature flue gas C；
b）High-temperature flue gas C cools down with purified part cold flue gas F air distributions, obtains reconciliation heat smoke D；
c）Reconcile heat smoke D by pipeline enter board-like drying box, in board-like drying box with the lignite on lignite conveying mechanism
Radiation, the convection current heat transfer of non-direct contact type are carried out, the cold flue gas for going out board-like drying box is E；
d）Cold flue gas E is divided into two parts after flue gas purification system is handled, and a part is flue gas F, and another part is flue gas G；
Wherein, the amount of flue gas F is adjusted according to the temperature of board-like drying tank inlet reconciliation heat smoke D, and flue gas F is through returning to wind turbine
After pressurization, with the C mixing of outlet of still high-temperature flue gas is burned, reconciliation heat smoke D is obtained；Flue gas G is discharged into air through air-introduced machine by chimney.
The lignite H of stoving process of the present invention, high moisture percentage continuously enters board-like drying box, in board-like drying box
Interior progress non-direct contact type drying, movement speed of the lignite in board-like drying box and residence time according to lignite moisture percentage and
Treating capacity is determined and can be adjusted, and filled with inert gas in board-like drying box, is dried to the lignite I after regulation moisture percentage through lignite
Conveying mechanism is delivered to downstream user.
Stoving process of the present invention, in step c）In, containing few in the discharge gas J in board-like drying box drying course
It measures coal and cracks or decompose the organic matter generated, gas J is after exhaust gas fan pressurizes for discharge, is sent into incinerator progress high-temperature oxydation and burns
It burns.
The present invention is dried in drying box, is dried by the way that the lignite of high moisture percentage is continuously entered board-like drying box
Lignite after to regulation moisture percentage is delivered to downstream user, during the drying process using with by the way of flue gas non-direct contact type,
And flue-gas temperature can effectively be adjusted according to lignite moisture percentage and treating capacity, to improve the effect to brown coal drying
Rate, quality and safety, and dry more adaptable.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
It is marked in figure：1 is incinerator, and 2 be drying box, and 3 be flue gas purification system, and 4 be chimney, and 5 be air-introduced machine, and 6 be to return
Return fan, 7 be combustion fan, and 8 be exhaust gas fan.
Specific implementation mode
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, a kind of non-direct contact lignite drying unit, including incinerator 1, drying box 2, flue gas purification system
3 and chimney 4, the incinerator 1 is provided with fuel gas inlet and burning air for generating high-temperature flue gas, the incinerator 1
The combustion air inlet of import, the incinerator 1 is connect with combustion fan 7, exhanst gas outlet and the drying box 2 of the incinerator 1
Air inlet connection, the gas outlet of the drying box 2 connect with flue gas purification system 3, and lignite is provided in the drying box 2
Conveying mechanism, the flow direction of the conveying direction of the lignite and flue gas in drying box 2 is on the contrary, and the lignite and drying box 2
Interior flue gas non-direct contact, 2 row's of being provided with bleeder holes of the drying box, row's bleeder holes that the drying box 2 is arranged are logical
It crosses exhaust gas fan 8 to connect with incinerator 1, the outlet end of the flue gas purification system 3 is divided into two gas circuits, wherein a gas circuit is logical
It crosses air-introduced machine 5 to connect with chimney 4, another gas circuit is by returning to wind turbine 6 and the piping connection that connect incinerator 1 and drying box 2.
In the present embodiment, the drying box 2 is board-like drying box, and the high-temperature flue gas is independent in board-like drying box
Flowing in gas passage, the lignite is conveyed by lignite conveying mechanism in the babinet of board-like drying box, in the board-like baking
Inert gas is filled in the babinet of dry case.
A kind of stoving process using above-mentioned non-direct contact lignite drying unit, the technique be collection discharge gas burn and it is brown
The drying integrated flow of coal, specifically includes following steps：
a）Fuel gas A and the burning air B after combustion fan pressurizes enter incinerator, obtain high-temperature flue gas C.
b）High-temperature flue gas C cools down with purified part cold flue gas F air distributions, obtains reconciliation heat smoke D.
c）Reconcile heat smoke D by pipeline enter board-like drying box, in board-like drying box on lignite conveying mechanism
Lignite carries out the radiation of non-direct contact type, convection current heat transfer, and the cold flue gas for going out board-like drying box is E；Board-like drying box was dried
The organic matter generated is cracked or decomposed in discharge gas J in journey containing a small amount of coal, gas J is after exhaust gas fan pressurizes for discharge, and feeding is burnt
It burns stove and carries out high-temperature oxydation burning, burn decomposing organic matter and generate high-temperature flue gas.
d）Cold flue gas E is divided into two parts after flue gas purification system is handled, and a part is flue gas F, and another part is flue gas
G, wherein purified treatment include desulphurization and denitration, dedusting etc..
Wherein, the amount of flue gas F is adjusted according to the temperature of board-like drying tank inlet reconciliation heat smoke D, and flue gas F is through returning
After wind turbine pressurization, with the C mixing of outlet of still high-temperature flue gas is burned, reconciliation heat smoke D is obtained, is used as lignite drying heat source；Flue gas G warps
Air-introduced machine is discharged into air by chimney.
Wherein, the lignite H of high moisture percentage continuously enters board-like drying box, and non-direct contact type is carried out in board-like drying box
Drying, movement speed and residence time of the lignite in board-like drying box are determined and can be adjusted according to lignite moisture percentage and treating capacity
Section, board-like drying box is interior filled with inert gas, effectively lignite can be prevented to generate spontaneous combustion during the drying process, be dried to regulation and contain
Lignite I after wet rate is delivered to downstream user through lignite conveying mechanism.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (8)
1. a kind of non-direct contact lignite drying unit, it is characterised in that：Including incinerator（1）, drying box（2）, gas cleaning
System（3）And chimney（4）, the incinerator（1）For generating high-temperature flue gas, the incinerator（1）Exhanst gas outlet and baking
Dry case（2）Air inlet connection, the drying box（2）Gas outlet and flue gas purification system（3）Connection, in the drying box
（2）Inside it is provided with lignite conveying mechanism, the conveying direction and drying box of the lignite（2）The flow direction of interior flue gas on the contrary, and
The lignite and drying box（2）Interior flue gas non-direct contact, the flue gas purification system（3）Outlet end be divided into two gas
Road a, wherein gas circuit passes through air-introduced machine（5）With chimney（4）Connection, another gas circuit is by returning to wind turbine（6）It is burned with connecting
Stove（1）And drying box（2）Piping connection.
2. non-direct contact lignite drying unit according to claim 1, it is characterised in that：The incinerator（1）Setting
There are fuel gas inlet and combustion air inlet, the incinerator（1）Combustion air inlet and combustion fan（7）Connection.
3. non-direct contact lignite drying unit according to claim 1, it is characterised in that：The drying box（2）Setting
There are row's bleeder holes, the drying box（2）Row's bleeder holes of setting pass through exhaust gas fan（8）With incinerator（1）Connection.
4. non-direct contact lignite drying unit according to claim 1, it is characterised in that：The drying box（2）For plate
Formula drying box, the high-temperature flue gas flow in board-like drying box in independent gas passage, and the lignite is conveyed by lignite
Mechanism conveys in the babinet of board-like drying box.
5. non-direct contact lignite drying unit according to claim 4, it is characterised in that：In the board-like drying box
Inert gas is filled in babinet.
6. a kind of stoving process using the non-direct contact lignite drying unit as described in any one of claim 1 to 5,
It is characterized in that：Include the following steps：
a）Fuel gas A and the burning air B after combustion fan pressurizes enter incinerator, obtain high-temperature flue gas C；
b）High-temperature flue gas C cools down with purified part cold flue gas F air distributions, obtains reconciliation heat smoke D；
c）Reconcile heat smoke D by pipeline enter board-like drying box, in board-like drying box with the lignite on lignite conveying mechanism
Radiation, the convection current heat transfer of non-direct contact type are carried out, the cold flue gas for going out board-like drying box is E；
d）Cold flue gas E is divided into two parts after flue gas purification system is handled, and a part is flue gas F, and another part is flue gas G；
Wherein, the amount of flue gas F is adjusted according to the temperature of board-like drying tank inlet reconciliation heat smoke D, and flue gas F is through returning to wind turbine
After pressurization, with the C mixing of outlet of still high-temperature flue gas is burned, reconciliation heat smoke D is obtained；Flue gas G is discharged into air through air-introduced machine by chimney.
7. stoving process according to claim 6, it is characterised in that：The lignite H of high moisture percentage continuously enters board-like drying
Case carries out non-direct contact type drying, movement speed and residence time of the lignite in board-like drying box in board-like drying box
It determines and can adjust according to lignite moisture percentage and treating capacity, filled with inert gas in board-like drying box, be dried to regulation containing wet
Lignite I after rate is delivered to downstream user through lignite conveying mechanism.
8. stoving process according to claim 6, it is characterised in that：In step c）In, in board-like drying box drying course
Discharge gas J in crack or decompose the organic matter generated containing a small amount of coal, gas J is after exhaust gas fan pressurizes for discharge, is sent into incinerator
Carry out high-temperature oxydation burning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810586741.0A CN108679988A (en) | 2018-06-08 | 2018-06-08 | A kind of non-direct contact lignite drying unit and stoving process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810586741.0A CN108679988A (en) | 2018-06-08 | 2018-06-08 | A kind of non-direct contact lignite drying unit and stoving process |
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| Publication Number | Publication Date |
|---|---|
| CN108679988A true CN108679988A (en) | 2018-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810586741.0A Pending CN108679988A (en) | 2018-06-08 | 2018-06-08 | A kind of non-direct contact lignite drying unit and stoving process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489360A (en) * | 2018-11-19 | 2019-03-19 | 刘燕红 | A kind of coal-fired flue-gas reuse means |
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| CN202361754U (en) * | 2011-12-02 | 2012-08-01 | 秦皇岛秦冶重工有限公司 | Lignite drying system |
| CN102927795A (en) * | 2012-06-27 | 2013-02-13 | 霍林郭勒中加褐煤提质有限公司 | System and method for drying brown coal indirectly in roller mode by flue gas |
| CN102997634A (en) * | 2012-12-18 | 2013-03-27 | 清华大学 | Moving bed brown coal drying method and device |
| CN103013615A (en) * | 2012-12-19 | 2013-04-03 | 华电电力科学研究院 | Efficient drying and quality-improving device and method for brown coal |
| CN107894173A (en) * | 2017-12-13 | 2018-04-10 | 中冶赛迪工程技术股份有限公司 | A kind of full negative pressure coke stoving process of flue gas self-circulation type and system |
| CN208312975U (en) * | 2018-06-08 | 2019-01-01 | 中国成达工程有限公司 | A kind of non-direct contact lignite drying unit |
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2018
- 2018-06-08 CN CN201810586741.0A patent/CN108679988A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202361754U (en) * | 2011-12-02 | 2012-08-01 | 秦皇岛秦冶重工有限公司 | Lignite drying system |
| CN102607040A (en) * | 2012-03-23 | 2012-07-25 | 上海康恒环境工程有限公司 | Method for incinerating domestic garbage and municipal sludge together |
| CN102927795A (en) * | 2012-06-27 | 2013-02-13 | 霍林郭勒中加褐煤提质有限公司 | System and method for drying brown coal indirectly in roller mode by flue gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489360A (en) * | 2018-11-19 | 2019-03-19 | 刘燕红 | A kind of coal-fired flue-gas reuse means |
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