CN208312975U - A kind of non-direct contact lignite drying unit - Google Patents
A kind of non-direct contact lignite drying unit Download PDFInfo
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- CN208312975U CN208312975U CN201820887056.7U CN201820887056U CN208312975U CN 208312975 U CN208312975 U CN 208312975U CN 201820887056 U CN201820887056 U CN 201820887056U CN 208312975 U CN208312975 U CN 208312975U
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- drying box
- lignite
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- flue gas
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Abstract
The utility model 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 passes through the piping connection for returning to blower and connecting incinerator and drying box.The utility model 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 the efficiency, quality and safety to brown coal drying.
Description
Technical field
The utility model belongs to coal chemical industry, technical field of electric power, in particular to a kind of non-direct contact lignite drying unit.
Background technique
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 all bigger (water content is high in especially), 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, dry after brown moisture in coal it is still very high；
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 atmosphere, to environmental effects.
Utility model content
The goal of the invention of the utility model is: in view of the above problems, lignite can be carried out by providing one kind
Safely, effectively dry non-direct contact lignite drying unit.
The technical solution of the utility model is achieved in that a kind of non-direct contact lignite drying unit, and feature exists
In: including incinerator, drying box, flue gas purification system and chimney, the incinerator is for generating high-temperature flue gas, the burning
The exhanst gas outlet of furnace and the air inlet of drying box connect, and the gas outlet of the drying box is connect with flue gas purification system, described
Lignite conveying mechanism is provided in drying box, in the conveying direction and drying box of the lignite flue gas flow direction on the contrary, and
Flue gas non-direct contact in the lignite and drying box, the outlet end of the flue gas purification system are divided into two gas circuits, wherein
One gas circuit is connect by air-introduced machine with chimney, and another gas circuit passes through the pipeline for returning to blower and connecting incinerator and drying box
Connection.
Non-direct contact lignite drying unit described in the utility model, the incinerator be provided with fuel gas inlet and
The combustion air inlet of combustion air inlet, the incinerator is connect with combustion fan.
Non-direct contact lignite drying unit described in the utility model, the drying box are provided with row's bleeder holes,
Row's bleeder holes of the drying box setting are connect by exhaust gas fan with incinerator.
Non-direct contact lignite drying unit described in the utility model, the drying box is board-like drying box, described
High-temperature flue gas flows in independent gas passage in board-like drying box, and the lignite is by lignite conveying mechanism in board-like drying
Conveying in the cabinet of case.
Non-direct contact lignite drying unit described in the utility model is filled in the cabinet of the board-like drying box
There is inert gas.
The utility model is dried in drying box by the way that the lignite of high moisture percentage is continuously entered board-like drying box,
Lignite after being dried to regulation moisture percentage is delivered to downstream user, during the drying process using the side with flue gas non-direct contact type
Formula, and flue-gas temperature can effectively be adjusted according to lignite moisture percentage and treating capacity, to improve to brown coal drying
Efficiency, quality and safety, and dry more adaptable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Marked in the figure: 1 is incinerator, 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 embodiment
With reference to the accompanying drawing, the utility model is described in detail.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
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, for the incinerator 1 for generating high-temperature flue gas, the incinerator 1 is provided with fuel gas inlet and combustion air
The combustion air inlet of import, the incinerator 1 is connect with combustion fan 7, the exhanst gas outlet and 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, is provided with lignite in the drying box 2
The flow direction of flue gas is on the contrary, and the lignite and drying box 2 in conveying mechanism, the conveying direction of the lignite and drying box 2
Interior flue gas non-direct contact, 2 row's of being provided with bleeder holes of 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 passes through the piping connection for returning to blower 6 and connecting 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 in the cabinet of board-like drying box by lignite conveying mechanism, in the board-like baking
Inert gas is filled in the cabinet of dry case.
The stoving process of the utility model is collection discharge gas burning and the drying integrated process of lignite, is specifically included following
Step:
A) fuel gas A and the combustion 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 distribution, obtains reconciliation hot fume D.
C) the hot fume D that reconciles passes through pipeline and enters board-like drying box, in board-like drying box and on lignite conveying mechanism
Lignite carries out the radiation of non-direct contact type, convective heat transfer, and the cold flue gas of board-like drying box is E out；Board-like drying box was dried
The organic matter generated is cracked or decomposed containing a small amount of coal in discharge gas J in journey, discharges gas J after exhaust gas fan pressurizes, feeding is burnt
It burns furnace 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 includes 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 hot fume D, and flue gas F is through returning
After blower pressurization, with outlet of still high-temperature flue gas C mixing is burned, reconciliation hot fume D is obtained, is used as lignite drying heat source；Flue gas G warp
Air-introduced machine is discharged into atmosphere 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 above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (5)
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) is for generating high-temperature flue gas, the exhanst gas outlet of the incinerator (1) and baking
The air inlet of dry case (2) connects, and the gas outlet of the drying box (2) is connect with flue gas purification system (3), in the drying box
(2) be provided with lignite conveying mechanism in, the conveying direction of the lignite and the flow direction of drying box (2) interior flue gas on the contrary, and
Flue gas non-direct contact in the lignite and drying box (2), the outlet end of the flue gas purification system (3) is divided into two gas
Road, wherein gas circuit connect by air-introduced machine (5) with chimney (4), another gas circuit by return blower (6) with connect burning
The piping connection of furnace (1) and drying box (2).
2. non-direct contact lignite drying unit according to claim 1, it is characterised in that: incinerator (1) setting
There are fuel gas inlet and combustion air inlet, the combustion air inlet of the incinerator (1) is connect with combustion fan (7).
3. non-direct contact lignite drying unit according to claim 1, it is characterised in that: drying box (2) setting
There are row's bleeder holes, row's bleeder holes of drying box (2) setting are connect by exhaust gas fan (8) with incinerator (1).
4. non-direct contact lignite drying unit according to claim 1, it is characterised in that: the drying box (2) is plate
Formula drying box, the high-temperature flue gas flow in independent gas passage in board-like drying box, and the lignite is conveyed by lignite
Mechanism conveys in the cabinet 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 cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820887056.7U CN208312975U (en) | 2018-06-08 | 2018-06-08 | A kind of non-direct contact lignite drying unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820887056.7U CN208312975U (en) | 2018-06-08 | 2018-06-08 | A kind of non-direct contact lignite drying unit |
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| Publication Number | Publication Date |
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| CN208312975U true CN208312975U (en) | 2019-01-01 |
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| CN201820887056.7U Active CN208312975U (en) | 2018-06-08 | 2018-06-08 | A kind of non-direct contact lignite drying unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679988A (en) * | 2018-06-08 | 2018-10-19 | 中国成达工程有限公司 | A kind of non-direct contact lignite drying unit and stoving process |
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2018
- 2018-06-08 CN CN201820887056.7U patent/CN208312975U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679988A (en) * | 2018-06-08 | 2018-10-19 | 中国成达工程有限公司 | A kind of non-direct contact lignite drying unit and stoving process |
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