CN208011751U - A kind of lignite pre-drying device for lignite generating set moderate oven cigarette - Google Patents
A kind of lignite pre-drying device for lignite generating set moderate oven cigarette Download PDFInfo
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- CN208011751U CN208011751U CN201820457743.5U CN201820457743U CN208011751U CN 208011751 U CN208011751 U CN 208011751U CN 201820457743 U CN201820457743 U CN 201820457743U CN 208011751 U CN208011751 U CN 208011751U
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Abstract
A kind of lignite pre-drying device for lignite generating set moderate oven cigarette, that there is drying capacities in order to solve prior art medium-speed pulverizer pulverized coal preparation system is poor for the utility model, cause unit output insufficient, job requirement is not achieved, when the fluctuation of as-fired coal moisture content is larger, the problem of being more difficult to ensure unit output, it includes the horizontal low temperature superheater of boiler, boiler economizer, hot smoke pipe road, hot stove cigarette wind turbine, coal breakage bucket, coal spout drier, medium-speed pulverizer and dry waste gas pipeline；The horizontal low temperature superheater of boiler and boiler economizer are installed on the pipe of boiler, hot stove cigarette smoking mouth is arranged on the pipe side wall of the boiler between the horizontal low temperature superheater of boiler and boiler economizer, the air opening end of coal spout drier is connected to one end of dry waste gas pipeline, the other end of dry waste gas pipeline is connected to the burner hearth of boiler, and the utility model is used for lignite predrying field.
Description
Technical field
The utility model is related to a kind of lignite pre-drying devices, and in particular to one kind being used for lignite generating set moderate oven cigarette
Lignite pre-drying device.
Background technology
Lignite is that time shorter coal is formed in coal resources, the minimum pit coal of degree of coalification, after being peat deposits
It is changed into the initial stage product of organic-biological rock through being dehydrated, being compacted, gains the name because appearance is brown or crineous.Lignite is mainly used for
Power Plant Fuel, it can also be used to the fields such as chemical industry.Lignite have fugitive constituent high (dry ash free basis fugitive constituent Vdaf > 37%),
Moisture height (total moisture about 30% or more), calorific value are relatively low (Qar, net=11000~15000kJ/kg).Lignite is contained due to oxygen
Amount high (Oar=8%~12%), volatile content is high and is easy spontaneous combustion.Lignite is easy to dry out in an atmosphere strong with machinery
Degree, becomes clastic.The characteristics of lignite, determines that its pulverized coal preparation system has certain particularity.
In power station boiler pulverizing system, coal pulverizer is both crushing plant, and crucial raw coal drying equipment, therefore all kinds of
Difference lies in coal pulverizer types for the maximum of pulverized coal preparation system.Coal pulverizer widely used at present mainly has low speed coal mill, medium-speed pulverizer
Coal machine and blower mill three categories.Coal pulverizer type selecting is mainly related with raw coal moisture, grindability and abrasiveness.Because of major part
Lignite moisture is higher and abrasiveness is weaker, therefore extensively using the stronger fan coal-grinding of drying capacity in current combustion lignite-fired unit
Mechanism powder system.But blower mill system complex, cost are also higher.In recent years, since medium-speed pulverizer compares fan
Mill Systems are simple, low cost, extensive use in engineering.
The prior art, that there is drying capacities is poor for medium-speed pulverizer pulverized coal preparation system, causes unit output insufficient, power deficiency is just
It is that design value is not achieved in unit, job requirement is not achieved and is more difficult to ensure unit when especially the fluctuation of as-fired coal moisture content is larger
Job requirement.
Utility model content
That there is drying capacities in order to solve prior art medium-speed pulverizer pulverized coal preparation system is poor for the utility model, leads to unit
Job requirement is not achieved in undercapacity, when the fluctuation of as-fired coal moisture content is larger, the problem of being more difficult to ensure unit output,
And then provide a kind of lignite pre-drying device for lignite generating set moderate oven cigarette.
The utility model adopts the technical scheme that in order to solve the above problem：It includes the horizontal low temperature superheater of boiler, pot
Stove economizer, hot smoke pipe road, hot stove cigarette wind turbine, coal breakage bucket, coal spout drier, medium-speed pulverizer and dry waste gas pipeline；Pot
The horizontal low temperature superheater of boiler and boiler economizer are installed, the setting of hot stove cigarette smoking mouth is low in boiler level on the pipe of stove
On the pipe side wall of boiler between warm superheater and boiler economizer, hot stove cigarette smoking mouth passes through hot smoke pipe road and hot stove cigarette
The arrival end of wind turbine connects, and the outlet end of hot stove cigarette wind turbine is connected to the air inlet of coal spout drier, coal spout drier
Air opening end is connected to one end of dry waste gas pipeline, and the other end of dry waste gas pipeline is connected to the burner hearth of boiler, coal breakage bucket
It is vertically arranged in above coal spout drier, and the outlet end of coal breakage bucket is connected to the top of coal spout drier, coal spout is dry
The bottom end of dry device is connected to medium-speed pulverizer.
The utility model has the beneficial effects that：
1, using medium temperature hot stove cigarette as drier, desiccant dryness capacity adjustment range is big, can meet all kinds of high-moistures
The drying demand of raw coal.
2, drier is inert media flue gas, and thus pulverized coal preparation system can effectively prevent coal dust detonation, safety good.
3, medium temperature hot stove cigarette extraction point is selected in boiler tail, and the hot stove cigarette of extraction is after 7 drier of coal breakage bucket with coal dust
It returns from burner, to being balanced with original boiler smoke circulation for boiler, is maintained, thus boiler operating parameter is influenced together
It is also minimum.
4, the flue-gas temperature extracted is no more than 450 DEG C, into hot cigarette wind turbine, improves the temperature environment of hot cigarette wind turbine, i.e.,
The utility model uses moderate oven cigarette wind turbine.The security risk for eliminating moderate oven cigarette wind turbine makes it that can run steadily in the long term.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model, and solid arrow direction is to extract temperature in boiler 1 to be no more than
The flow direction of 450 DEG C of flue gases.
Specific implementation mode
Specific implementation mode one：Embodiment is described with reference to Fig. 1, a kind of described in present embodiment to be used for lignite generator
The lignite pre-drying device of group moderate oven cigarette, it includes the horizontal low temperature superheater 2 of boiler, boiler economizer 4, hot smoke pipe road 5, heat
Stove cigarette wind turbine 6, coal breakage bucket 7, coal spout drier 8, medium-speed pulverizer 9 and dry waste gas pipeline 10；Pacify on the pipe of boiler 1
Equipped with the horizontal low temperature superheater 2 of boiler and boiler economizer 4, hot stove cigarette smoking mouth 3 is arranged in horizontal 2 He of low temperature superheater of boiler
On the pipe side wall of boiler 1 between boiler economizer 4, hot stove cigarette smoking mouth 3 passes through hot smoke pipe road 5 and hot stove cigarette wind turbine 6
Arrival end connection, the outlet end of hot stove cigarette wind turbine 6 is connected to the air inlet of coal spout drier 8, and coal spout drier 8 goes out
Air port end is connected to one end of dry waste gas pipeline 10, and the other end of dry waste gas pipeline 10 is connected to the burner hearth of boiler 1, coal breakage
Bucket 7 is vertically arranged in 8 top of coal spout drier, and the outlet end of coal breakage bucket 7 is connected to the top of coal spout drier 8, is fallen
The bottom end of coal pipe drier 8 is connected to medium-speed pulverizer 9.
Specific implementation mode two：Embodiment is described with reference to Fig. 1, a kind of described in present embodiment to be used for lignite generator
The lignite pre-drying device of group moderate oven cigarette, it further includes control valve 12, and control valve 12 is mounted on 1 pipe of boiler and hot stove cigarette
On hot smoke pipe road 5 between wind turbine 6.Other structures are same as the specific embodiment one with connection relation.
Specific implementation mode three：Embodiment is described with reference to Fig. 1, a kind of described in present embodiment to be used for lignite generator
The lignite pre-drying device of group moderate oven cigarette, it further includes emission nozzle 11, and the other end of dry waste gas pipeline 10 is equipped with useless
Gas jets 11, emission nozzle 11 are connected to the burner hearth of boiler 1.Other structures are same as the specific embodiment one with connection relation.
Specific implementation mode four：Embodiment is described with reference to Fig. 1, a kind of described in present embodiment to be used for lignite generator
The lignite pre-drying device of group moderate oven cigarette, the horizontal low temperature superheater 2 of boiler are arranged above boiler economizer 4.Boiler is horizontal
Low temperature superheater 2 and boiler economizer 4 are arranged in the tail portion of 1 pipe of boiler, other structures and connection relation and specific implementation
Mode one is identical.
Specific implementation mode five：Embodiment is described with reference to Fig. 1, a kind of described in present embodiment to be used for lignite generator
The lignite pre-drying device of group moderate oven cigarette, outlet end and the dry waste gas pipeline 10 of hot stove cigarette wind turbine 6 are oppositely arranged on coal breakage
On the side wall of pipe drier 8.Increase abundant drying of the hot stove cigarette wind turbine 6 to lignite, other structures are real with connection relation and specifically
It is identical to apply mode one.
Claims (5)
1. a kind of lignite pre-drying device for lignite generating set moderate oven cigarette, it is characterised in that：It includes boiler level
Low temperature superheater (2), boiler economizer (4), hot smoke pipe road (5), hot stove cigarette wind turbine (6), coal breakage bucket (7), coal spout drier
(8), medium-speed pulverizer (9) and dry waste gas pipeline (10)；Boiler horizontal low temperature superheater is installed on the pipe of boiler (1)
(2) it is arranged in the horizontal low temperature superheater of boiler (2) and boiler economizer (4) with boiler economizer (4), hot stove cigarette smoking mouth (3)
Between boiler (1) pipe side wall on, hot stove cigarette smoking mouth (3) is entered by hot smoke pipe road (5) and hot stove cigarette wind turbine (6)
The connection of mouth end, the outlet end of hot stove cigarette wind turbine (6) are connected to the air inlet of coal spout drier (8), coal spout drier (8)
Air opening end is connected to the one end of dry waste gas pipeline (10), the burner hearth of the other end and boiler (1) of dry waste gas pipeline (10)
Connection, coal breakage bucket (7) are vertically arranged in above coal spout drier (8), and the outlet end of coal breakage bucket (7) and coal spout drier
(8) top connection, the bottom end of coal spout drier (8) is connected to medium-speed pulverizer (9).
2. a kind of lignite pre-drying device for lignite generating set moderate oven cigarette, feature exist according to claim 1
In：It further includes control valve (12), and control valve (12) is mounted on the hot cigarette between boiler (1) pipe and hot stove cigarette wind turbine (6)
On pipeline (5).
3. a kind of lignite pre-drying device for lignite generating set moderate oven cigarette, feature exist according to claim 1
In：It further includes emission nozzle (11), and the other end of dry waste gas pipeline (10) is equipped with emission nozzle (11), emission nozzle
(11) it is connected to the burner hearth of boiler (1).
4. a kind of lignite pre-drying device for lignite generating set moderate oven cigarette, feature exist according to claim 1
In：The horizontal low temperature superheater of boiler (2) setting is above boiler economizer (4).
5. a kind of lignite pre-drying device for lignite generating set moderate oven cigarette, feature exist according to claim 1
In：The outlet end of hot stove cigarette wind turbine (6) is oppositely arranged on dry waste gas pipeline (10) on the side wall of coal spout drier (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820457743.5U CN208011751U (en) | 2018-04-02 | 2018-04-02 | A kind of lignite pre-drying device for lignite generating set moderate oven cigarette |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820457743.5U CN208011751U (en) | 2018-04-02 | 2018-04-02 | A kind of lignite pre-drying device for lignite generating set moderate oven cigarette |
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| Publication Number | Publication Date |
|---|---|
| CN208011751U true CN208011751U (en) | 2018-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820457743.5U Active CN208011751U (en) | 2018-04-02 | 2018-04-02 | A kind of lignite pre-drying device for lignite generating set moderate oven cigarette |
Country Status (1)
| Country | Link |
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| CN (1) | CN208011751U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022052500A1 (en) * | 2020-09-08 | 2022-03-17 | 东方电气集团东方锅炉股份有限公司 | Lignite drying method and drying system using flue gas recirculation |
| RU2817237C1 (en) * | 2020-09-08 | 2024-04-11 | Дунфанбойлер Груп Ко., Лтд. | Drying method and drying system of brown coal using flue gas recirculation |
-
2018
- 2018-04-02 CN CN201820457743.5U patent/CN208011751U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022052500A1 (en) * | 2020-09-08 | 2022-03-17 | 东方电气集团东方锅炉股份有限公司 | Lignite drying method and drying system using flue gas recirculation |
| RU2817237C1 (en) * | 2020-09-08 | 2024-04-11 | Дунфанбойлер Груп Ко., Лтд. | Drying method and drying system of brown coal using flue gas recirculation |
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