CN206638014U - A kind of brown coal drying and upgrading electricity generation system - Google Patents
A kind of brown coal drying and upgrading electricity generation system Download PDFInfo
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- CN206638014U CN206638014U CN201720179395.5U CN201720179395U CN206638014U CN 206638014 U CN206638014 U CN 206638014U CN 201720179395 U CN201720179395 U CN 201720179395U CN 206638014 U CN206638014 U CN 206638014U
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Abstract
A kind of brown coal drying and upgrading electricity generation system of the utility model, including dried-air drier, steam dryer, secondary drying lack of gas cooler, air heater, boiler air preheater and low-level (stack-gas) economizer；Wherein, thermal source used in steam dryer drying brown coal is extracted steam from turbine, dried-air drier thermal source and dehydration mediators use the hot-air heated through secondary drying lack of gas, and secondary drying lack of gas heating aqueous medium in secondary drying lack of gas cooler, aqueous medium after heating heats in air heater to the air in air inlet drying machine and boiler air preheater, and boiler air preheater air intake is connected with air heater outlet, the boiler economizer outlet boiler smoke of system is divided into two-way, enter boiler air preheater all the way, enter low-level (stack-gas) economizer all the way, boiler air preheater and the boiler smoke of low-level (stack-gas) economizer discharge enter deduster.The utility model is dried using two-stage, the moisture in lignite is reduced, so as to reduce boiler smoke tolerance and boiler initial cost.
Description
Technical field：
The utility model belongs to thermal power generating technology field, and in particular to a kind of brown coal drying and upgrading electricity generation system.
Background technology：
Lignite is the colm that moisture is high, calorific value is low, accounts for the 13% of coal in China reserves, is China's thermal power generation row
One of main fuel of industry.But existing lignite generation technology has a large amount of defects, including lignite generating efficiency is low, unit initial cost
Greatly, pollutant discharge amount is big etc..
Utility model content：
The purpose of this utility model is to improve lignite utilization ratio, there is provided a kind of brown coal drying and upgrading electricity generation system.
To reach above-mentioned purpose, the utility model is adopted the following technical scheme that to realize：
A kind of brown coal drying and upgrading electricity generation system, including the cooling of dried-air drier, steam dryer, secondary drying lack of gas
Device, air heater, boiler air preheater and low-level (stack-gas) economizer；Wherein,
Thermal source is extracted steam from turbine used in the steam dryer drying brown coal, and dried-air drier thermal source and dehydration mediators are adopted
With the hot-air heated through secondary drying lack of gas, and secondary drying lack of gas heating aqueous medium in secondary drying lack of gas cooler,
Aqueous medium after heating heats in air heater to the air in air inlet drying machine and boiler air preheater,
And boiler air preheater air intake is connected with air heater outlet, the boiler economizer outlet boiler smoke of system is divided into
Two-way, all the way into boiler air preheater, all the way into low-level (stack-gas) economizer, boiler air preheater and low-level (stack-gas) economizer discharge
Boiler smoke enter deduster.
The utility model, which further improves, to be, boiler economizer exports boiler smoke in boiler air preheater medium temperature
Degree can be down to 110~130 DEG C.
The utility model, which further improves, to be, boiler economizer exiting flue gas temperature in low-level (stack-gas) economizer can drop
To 80~100 DEG C.
The utility model, which further improves, to be, air temperature in air heater can be heated to 45~65 DEG C.
The utility model, which further improves, to be, in addition to water pump, and it is arranged on secondary drying lack of gas cooler and sky
Between hot-air heater, for circulation of the aqueous medium between secondary drying lack of gas cooler and air heater.
The utility model has the following advantages：
In system provided by the utility model, lignite is sent into coal generating system combustion power generation, lignite after two-stage is dried
Second level drying machine is that steam dryer uses the energy of extracted steam from turbine as thermal source, and first order drying machine is dried-air drier,
The hot-air after the dry gas heating of second level steam dryer is used as thermal source and dehydration mediators；Boiler air-supply is equally adopted
After being heated with secondary drying machine dry gas, boiler air preheater is sent into；It is divided into two before boiler smoke air inlet preheater
Road, air inlet preheater, heats heat regenerative system condensate into low-level (stack-gas) economizer all the way all the way.The utility model can be significantly
Degree reduces drying process energy consumption, while increases substantially lignite electricity generation system efficiency.In short, the utility model has：
1st, the utility model uses is dried using two-stage, reduces the moisture in lignite, so as to reduce boiler smoke tolerance,
And then reduce boiler initial cost；
2nd, the utility model is based on the principle of " temperature counterpart, cascade utilization " during energy utilization, reduces brown coal drying
Process energy consumption, so as to reduce lignite electricity generation system standard coal consumption rate for generating up to 10~15g/kWh.
3rd, the utility model improves the air themperature into boiler air preheater, so as to reduce in air preheater
Corrosion risk, improve the reliability of system.
Brief description of the drawings：
Accompanying drawing 1：A kind of structural representation of brown coal drying and upgrading electricity generation system of the utility model.
In figure：1 it is dried-air drier, 2 be steam dryer, 3 be secondary drying lack of gas cooler, 4 be water pump, 5 is empty
Hot-air heater, 6 be boiler air preheater, 7 be low-level (stack-gas) economizer.
Embodiment：
The utility model is made further instructions below in conjunction with accompanying drawing.
Operation principle of the present utility model is as follows：
Lignite is the colm that moisture is high, calorific value is low, accounts for the 13% of coal in China reserves.It is China's thermal power generation row
One of main fuel of industry.But existing lignite generation technology has the defects of a large amount of, including lignite generating efficiency is low, unit is just thrown
Money is big, pollutant discharge amount is big etc., because the moisture content of lignite reaches as high as 60%, lignite is directly used in combustion power generation
When, these moisture evaporations absorb substantial amounts of high-grade energy, while can increase boiler smoke tolerance so that boiler volume increases, and makes
Valency improves.Therefore, it is to improve the main path of lignite utilization ratio to reduce the moisture in lignite.
During brown coal drying, the moisture evaporation in lignite is, it is necessary to absorb substantial amounts of heat.Try to recovery drying is weary
The energy of gas, it will help reduce drying process energy consumption.According to the grade of dry gas, it can be used for heating air, and heat is empty
Gas on the one hand may be used as drying source and dehydration mediators to lignite carry out it is predrying, on the one hand can be sent into boiler air preheating
Device.Hot-air is sent into boiler air preheater, causes boiler air preheater thermic load to decline, therefore can separate part and pass by one's way
Mouth economizer exit boiler smoke heats Steam Turbine Regenerative System condensate in low-level (stack-gas) economizer.
As shown in figure 1, being based on above theory analysis, the utility model proposes a kind of brown coal drying and upgrading electricity generation system.
Its course of work is：A kind of brown coal drying and upgrading electricity generation system, including dried-air drier 1, steam dryer 2, two
Level dry gas cooler 3, water pump 4, air heater 5, boiler air preheater 6 and low-level (stack-gas) economizer 7, lignite initially enters
After carrying out preheating and drying in dried-air drier 1, it is sent into steam dryer 2 and is further dried, and the predrying coal of two level is sent into pot
Burner combustion power generation；The thermal source of steam dryer 2 is extracted steam from turbine, after extracted steam from turbine condenses in steam dryer 2
It is back in the oxygen-eliminating device of Steam Turbine Regenerative System；Dry gas caused by steam dryer 2 are sent into the cooling of secondary drying lack of gas
Heating aqueous medium in device 3, aqueous medium are sent into air heater 5 to entering boiler air preheater 6 and being air-dried through water pump 4
Air in machine 1 is heated；Boiler economizer exiting flue gas is divided into two-way, is partly into boiler air preheater 6 and heats
Boiler is blown, and a part is sent into low-level (stack-gas) economizer 7 and heats heat regenerative system condensate, boiler air preheater 6 and low-level (stack-gas) economizer 7
The boiler smoke of discharge enters deduster.
Claims (5)
1. a kind of brown coal drying and upgrading electricity generation system, it is characterised in that including dried-air drier (1), steam dryer (2), two
Level dry gas cooler (3), air heater (5), boiler air preheater (6) and low-level (stack-gas) economizer (7)；Wherein,
Thermal source used in steam dryer (2) drying brown coal is extracted steam from turbine, dried-air drier (1) thermal source and dehydration mediators
Using the hot-air heated through secondary drying lack of gas, and secondary drying lack of gas heat water in secondary drying lack of gas cooler (3)
Medium, the aqueous medium after heating is in air heater (5) in air inlet drying machine (1) and boiler air preheater (6)
Air heated, and the outlet of boiler air preheater (6) air intake and air heater (5) is connected, the boiler of system
Economizer exit boiler smoke is divided into two-way, all the way into boiler air preheater (6), all the way into low-level (stack-gas) economizer (7), pot
Stove air preheater (6) and the boiler smoke of low-level (stack-gas) economizer (7) discharge enter deduster.
2. a kind of brown coal drying and upgrading electricity generation system according to claim 1, it is characterised in that boiler economizer exports pot
Kiln gas temperature in boiler air preheater (6) can be down to 110~130 DEG C.
3. a kind of brown coal drying and upgrading electricity generation system according to claim 1, it is characterised in that boiler economizer exports cigarette
Gas (7) temperature in low-level (stack-gas) economizer can be down to 80~100 DEG C.
4. a kind of brown coal drying and upgrading electricity generation system according to claim 1, it is characterised in that air is in air heater
(5) temperature can be heated to 45~65 DEG C in.
A kind of 5. brown coal drying and upgrading electricity generation system according to claim 1, it is characterised in that also including water pump (4), its
It is arranged between secondary drying lack of gas cooler (3) and air heater (5), for aqueous medium in secondary drying lack of gas cooler
(3) circulation between air heater (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720179395.5U CN206638014U (en) | 2017-02-27 | 2017-02-27 | A kind of brown coal drying and upgrading electricity generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720179395.5U CN206638014U (en) | 2017-02-27 | 2017-02-27 | A kind of brown coal drying and upgrading electricity generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206638014U true CN206638014U (en) | 2017-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720179395.5U Expired - Fee Related CN206638014U (en) | 2017-02-27 | 2017-02-27 | A kind of brown coal drying and upgrading electricity generation system |
Country Status (1)
| Country | Link |
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| CN (1) | CN206638014U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766854A (en) * | 2017-02-27 | 2017-05-31 | 西安热工研究院有限公司 | A kind of brown coal drying and upgrading electricity generation system |
| CN111810940A (en) * | 2020-03-17 | 2020-10-23 | 同济大学 | Oxygen-enriched combustion boiler system for lignite multistage drying |
-
2017
- 2017-02-27 CN CN201720179395.5U patent/CN206638014U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766854A (en) * | 2017-02-27 | 2017-05-31 | 西安热工研究院有限公司 | A kind of brown coal drying and upgrading electricity generation system |
| CN111810940A (en) * | 2020-03-17 | 2020-10-23 | 同济大学 | Oxygen-enriched combustion boiler system for lignite multistage drying |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171114 Termination date: 20190227 |