CN208170367U - High temperature dust pelletizing system that station boiler is adjustable - Google Patents
High temperature dust pelletizing system that station boiler is adjustable Download PDFInfo
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- CN208170367U CN208170367U CN201820546482.4U CN201820546482U CN208170367U CN 208170367 U CN208170367 U CN 208170367U CN 201820546482 U CN201820546482 U CN 201820546482U CN 208170367 U CN208170367 U CN 208170367U
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- denitrification apparatus
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Abstract
The utility model relates to a kind of adjustable high temperature dust pelletizing systems of station boiler, belong to station boiler dedusting control technology field.Currently, station boiler deduster is arranged after air preheater, the easy facilities air preheater and denitrification apparatus to before deduster of dust causes damages.The utility model is arranged in boiler back end ductwork, including low temperature superheater, level-one economizer, hot precipitator, denitrification apparatus, second level economizer and air preheater.The utility model is characterized in that deduster is arranged in high-temperature flue gas region, the dust in flue gas can be removed before denitrification apparatus, avoid the problem of denitrating catalyst inactivation and blocking, air preheater blocking etc. are caused by dust stratification；On the other hand arrangement two-stage economizer can effectively control the best specific resistance raising efficiency of dust collection of smoke temperature arrival can guarantee that denitrification apparatus is in suitable temperature ranges again, improve denitration efficiency.
Description
Technical field
The utility model belongs to station boiler dedusting control technology field, more particularly to a kind of station boiler is adjustable
High-temperature dust removal system.
Background technique
Currently, station boiler deduster is arranged after air preheater, such as application No. is in 201610382902.5
State's patent, and the easy facilities air preheater and denitrification apparatus to before deduster of dust causes damages.To air preheater
It is easy to cause heat-transfer surface to block, catalyst inactivation is be easy to cause to denitrating catalyst.In order to reduce these harm, and need to put into big
The slag-blowing equipmemt of amount causes a large amount of resource consumption, and cannot avoid these damages completely.
For electric precipitation, due to the relationship of specific resistance, need to control the flue-gas temperature for entering deduster, and it is current
It is limited by exhaust gas temperature, deduster inlet temperature is usually 120 DEG C to 145 DEG C, limits efficiency of dust collection, and temperature is also difficult to
Control.
Utility model content
The purpose of the utility model is to overcome the above deficiencies in the existing technologies, and provide a kind of structure design conjunction
Dedusting entrance flue gas temperature is adjusted in high temperature dust pelletizing system that the station boiler of reason is adjustable, and it is pre- to denitrification apparatus, air to reduce dust
The harm of hot device.
The technical scheme in the invention for solving the above technical problem is：A kind of adjustable high-temperature dust removal system of station boiler
System, including low temperature superheater, air preheater and flue, the low temperature superheater and air preheater are arranged on flue,
It is characterized in that, further including level-one economizer, hot precipitator, denitrification apparatus and second level economizer, the level-one economizer, height
Warm deduster, denitrification apparatus and second level economizer are successively set on flue, the level-one economizer, hot precipitator, denitration
Device and second level economizer are between low temperature superheater and air preheater；Primary effluent is provided on the level-one economizer
Mouthful and level-one admission port, secondary effluent mouth and second level admission port are provided on the second level economizer, the second level economizer is logical
It crosses connecting tube to connect with level-one economizer, connecting tube flow control valve is provided in the connecting tube.It is reasonable in design, high temperature
Deduster can reduce dust to denitrification apparatus and air preheat for carrying out flue gas ash removal, position setting at high operating temperatures
The harm of device.
Furthermore, the front of flue is arranged in the low temperature superheater, and flue is arranged in the air preheater
Rear portion.
Furthermore, the primary effluent mouth is connect with boiler, and the level-one admission port is connect with water pump.Level-one saves coal
The heat exchange of device water supply, adjusts the temperature of flue gas, and boiler is sent into the water supply after heat exchange, and the flue gas after heat exchange leads to high-temperature dust removal
Device.
Furthermore, the secondary effluent mouth is connect with level-one economizer, and the second level admission port is connect with water pump.Two
Grade economizer water supply heat exchange, the water supply after heat exchange flow into level-one economizer, the cigarette for adjusting the temperature of flue gas, after heat exchange
Gas leads to air preheater.
Furthermore, the level-one economizer and second level economizer are provided with feed water flow regulating valve.
Furthermore, the level-one economizer is arranged in front of the import of hot precipitator, and the second level economizer is set
It sets at the outlet rear of denitrification apparatus.For controlling the flue-gas temperature for entering hot precipitator, the dust removing effects of flue gas are improved.
A kind of application method of the adjustable high temperature dust pelletizing system of station boiler as described above, which is characterized in that the application
Method is as follows：High-temperature flue gas from burner hearth is successively introduced into low temperature superheater, level-one economizer, hot precipitator, denitration dress
It sets, in second level economizer and air preheater, when high-temperature flue gas passes through level-one economizer, carries out hot friendship with level-one economizer
It changes, makes flue gas control in suitable temperature ranges, run conducive to the hot precipitator and denitrification apparatus at level-one economizer rear；Later
Flue gas is passed through hot precipitator, and dust-laden particle is in the temperature range of smaller specific resistance in flue gas at this time, and dust is removed clean；
Flue gas is subsequently passed denitrification apparatus, and catalyst is in the temperature region of greater activity in denitrification apparatus at this time, and in flue gas not
Dust again containing damage denitrification apparatus, the working efficiency of denitrification apparatus and service life greatly improve；Flue gas is saved by second level later
The heat of coal device, flue gas is absorbed, and guarantees the temperature of air preheater inlet flue gas；Air preheater further absorbs more than flue gas
Heat guarantees supply air temperature.
Furthermore, when the outlet smoke temperature of low temperature superheater increases, connecting tube flow control valve is turned down, so that passing through
The water supply of second level economizer reduces, and is increased by the water supply of level-one economizer, and the inlet flue gas temperature for controlling hot precipitator makes it
It is reduced to suitable temperature；When the outlet smoke temperature of low temperature superheater reduces, big connecting tube flow control valve is opened, so that passing through second level
The water supply of economizer increases, and is reduced by the water supply of level-one economizer, and control hot precipitator inlet flue gas temperature is increased to it
Suitable temperature.The flue-gas temperature for entering hot precipitator is adjusted, control smoke temperature reaches suitable specific resistance, and guarantees that denitrification apparatus is transported
Trip temperature.
Furthermore, the high-temperature flue gas from burner hearth is successively introduced by low temperature superheater by air-introduced machine, level-one saves coal
In device, hot precipitator, denitrification apparatus, second level economizer and air preheater.
The utility model compared with prior art, has the following advantages that and effect：The utility model is by adjusting deduster
Inlet flue gas temperature improves efficiency of dust collection, and can guarantee the flue-gas temperature that denitrification apparatus operation needs；Cigarette is carried out before denitrification apparatus
The dedusting of gas reduces harm of the dust to catalyst in denitrification apparatus, extends the service life of catalyst；It also reduces simultaneously
Dust is endangered caused by air preheater heat-transfer surface, increases the heat exchange efficiency of air preheater, improves unit operation
Economy.
Deduster is arranged in high-temperature flue gas region by the utility model, and the powder in flue gas can be removed before denitrification apparatus
Dirt avoids the problem of denitrating catalyst inactivation and blocking, air preheater blocking etc. are caused by dust stratification；On the other hand arrangement two-stage
Economizer can effectively control the best specific resistance raising efficiency of dust collection of smoke temperature arrival can guarantee that denitrification apparatus is in suitable temperature again
Range improves denitration efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment.
In figure：Low temperature superheater 1, level-one economizer 2, hot precipitator 3, denitrification apparatus 4, second level economizer 5, air are pre-
Hot device 6, primary effluent mouth 7, level-one admission port 8, connecting tube 9, secondary effluent mouth 10, second level admission port 11, flue 12, connecting tube
Flow control valve 13.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
Referring to Fig. 1, the adjustable high temperature dust pelletizing system of station boiler in the present embodiment includes low temperature superheater 1, level-one province coal
Device 2, hot precipitator 3, denitrification apparatus 4, second level economizer 5, air preheater 6 and flue 12.
Low temperature superheater 1, level-one economizer 2, hot precipitator 3, denitrification apparatus 4, second level economizer 5 and air preheater
6 are successively set on flue 12；Wherein, the front of flue 12 is arranged in low temperature superheater 1, and air preheater 6 is arranged in flue
12 rear portion, the dedusting system of level-one economizer 2, hot precipitator 3, denitrification apparatus 4 and second level economizer 5 as temperature-adjustable
System is arranged between low temperature superheater 1 and air preheater 6.Before the import of hot precipitator 3 is arranged in level-one economizer 2
The outlet rear of denitrification apparatus 4 is arranged in side, second level economizer 5.
Primary effluent mouth 7 and level-one admission port 8 are provided on level-one economizer 2, primary effluent mouth 7 is connect with boiler, and one
Grade admission port 8 is connect with water pump；Water supply after heating is delivered to boiler by water outlet 7, admission port 8 connect feed pump supplement to
Water.Secondary effluent mouth 10 and second level admission port 11 are provided on second level economizer 5, secondary effluent mouth 10 and level-one economizer 2 connect
It connects, second level admission port 11 is connect with water pump；Second level economizer 5 is connect by connecting tube 9 with level-one economizer 2, is set in connecting tube 9
It is equipped with connecting tube flow control valve 13.Level-one economizer 2 and second level economizer 5 are provided with feed water flow regulating valve, and level-one saves
Water supply heat exchange can be carried out between coal device 2 and second level economizer 5, control flue-gas temperature.
A kind of application method of the adjustable high temperature dust pelletizing system of station boiler as described above, application method are as follows：By drawing
High-temperature flue gas from burner hearth is successively introduced low temperature superheater 1, level-one economizer 2, hot precipitator 3, denitrification apparatus by blower
4, in second level economizer 5 and air preheater 6, when high-temperature flue gas passes through level-one economizer 2, heat is carried out with level-one economizer 2
Exchange makes flue gas control in suitable temperature ranges, transports conducive to the hot precipitator 3 and denitrification apparatus 4 at 2 rear of level-one economizer
Row；Flue gas is passed through hot precipitator 3 later, and dust-laden particle is in the temperature range of smaller specific resistance, dust quilt in flue gas at this time
Removal is clean；Flue gas is subsequently passed denitrification apparatus 4, and catalyst is in the temperature region of greater activity in denitrification apparatus 4 at this time, and
And the dust in flue gas no longer containing damage denitrification apparatus 4, the working efficiency of denitrification apparatus 4 and service life greatly improve；Cigarette later
Gas is absorbed by second level economizer 5, the heat of flue gas, guarantees the temperature of 6 inlet flue gas of air preheater；Air preheater 6
Fume afterheat is further absorbed, guarantees supply air temperature.
When the outlet smoke temperature of low temperature superheater 1 increases, connecting tube flow control valve 13 is turned down, so that saving coal by second level
The water supply of device 5 reduces, and is increased by the water supply of level-one economizer 2, and the inlet flue gas temperature of control hot precipitator 3 is reduced to it
Suitable temperature；When the outlet smoke temperature of low temperature superheater 1 reduces, big connecting tube flow control valve 13 is opened, so that saving by second level
The water supply of coal device 5 increases, and is reduced by the water supply of level-one economizer 2, and control 3 inlet flue gas temperature of hot precipitator is increased to it
Suitable temperature.
Although the utility model is disclosed as above with embodiment, its protection scope being not intended to limit the utility model,
Any technical staff for being familiar with this technology, it is made in the conception and scope for not departing from the utility model to change and retouch,
It all should belong to the protection range of the utility model.
Claims (6)
1. a kind of adjustable high temperature dust pelletizing system of station boiler, including low temperature superheater, air preheater and flue, the low temperature mistake
Hot device and air preheater are arranged on flue, which is characterized in that further include level-one economizer, hot precipitator, denitration dress
It sets and is successively set on flue with second level economizer, the level-one economizer, hot precipitator, denitrification apparatus and second level economizer
On, the level-one economizer, hot precipitator, denitrification apparatus and second level economizer be located at low temperature superheater and air preheater it
Between；It is provided with primary effluent mouth and level-one admission port on the level-one economizer, is provided with second level on the second level economizer and goes out
The mouth of a river and second level admission port, the second level economizer are connect with level-one economizer by connecting tube, are provided in the connecting tube
Connecting tube flow control valve.
2. the adjustable high temperature dust pelletizing system of station boiler according to claim 1, which is characterized in that the low temperature superheater is set
It sets in the front of flue, the rear portion of flue is arranged in the air preheater.
3. the adjustable high temperature dust pelletizing system of station boiler according to claim 1, which is characterized in that the primary effluent mouth with
Boiler connection, the level-one admission port is connect with water pump.
4. the adjustable high temperature dust pelletizing system of station boiler according to claim 1, which is characterized in that the secondary effluent mouth with
The connection of level-one economizer, the second level admission port is connect with water pump.
5. the adjustable high temperature dust pelletizing system of station boiler according to claim 1, which is characterized in that the level-one economizer and
Second level economizer is provided with feed water flow regulating valve.
6. the adjustable high temperature dust pelletizing system of station boiler according to claim 1, which is characterized in that the level-one economizer is set
It sets in front of the import of hot precipitator, the outlet rear of denitrification apparatus is arranged in the second level economizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820546482.4U CN208170367U (en) | 2018-04-17 | 2018-04-17 | High temperature dust pelletizing system that station boiler is adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820546482.4U CN208170367U (en) | 2018-04-17 | 2018-04-17 | High temperature dust pelletizing system that station boiler is adjustable |
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| CN208170367U true CN208170367U (en) | 2018-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679594A (en) * | 2018-04-17 | 2018-10-19 | 华电电力科学研究院有限公司 | Station boiler is adjustable high temperature dust pelletizing system and application process |
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2018
- 2018-04-17 CN CN201820546482.4U patent/CN208170367U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679594A (en) * | 2018-04-17 | 2018-10-19 | 华电电力科学研究院有限公司 | Station boiler is adjustable high temperature dust pelletizing system and application process |
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