CN208398113U - A kind of pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler - Google Patents
A kind of pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler Download PDFInfo
- Publication number
- CN208398113U CN208398113U CN201820476465.8U CN201820476465U CN208398113U CN 208398113 U CN208398113 U CN 208398113U CN 201820476465 U CN201820476465 U CN 201820476465U CN 208398113 U CN208398113 U CN 208398113U
- Authority
- CN
- China
- Prior art keywords
- coal
- pulverized
- powder
- pulverizer
- air
- Prior art date
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of pulverized coal preparation systems of medium-speed pulverizer warehouse formula pulverized-coal fired boiler, including feeder structure, the coal pulverizer being connect with the coal outlet of feeder structure, the coal pulverizer wind pushing mechanism being connect with the air inlet of coal pulverizer, stocking mechanism is separated with the fine powder that the meal outlet of coal pulverizer connects and the boiler of the meal outlet connection of stocking mechanism is separated with fine powder, coal pulverizer is medium-speed pulverizer, the powder inlet of pulverized coal bin is connected with row powder fan, the meal outlet of row powder fan connects boiler, the meal outlet of pulverized coal bin is connected with air and powder mixer, the air inlet of air and powder mixer is connected with mixer wind pushing mechanism, the meal outlet of air and powder mixer connects boiler.Medium-speed pulverizer operation power consumption is low, and stage operation meets power grid in different time periods and adjusts needs, and power savings are obvious；Metal consumption is low, and grinding machine abrasion are low, and for the course of work of coal pulverizer based on squeezing action, noise is small；The operating condition of coal pulverizer and being not directly dependent upon for boiler operatiopn, whole equipment and system are reliable.
Description
Technical field
The utility model relates to the pulverized coal preparation system technical fields of pulverized-coal fired boiler, in particular to a kind of medium-speed pulverizer warehouse formula
The pulverized coal preparation system of pulverized-coal fired boiler.
Background technique
In modern thermal power generation unit, the heavy duty boiler overwhelming majority uses suspension firing.Fire coal is through special powder processed
System is milled into fine powder, and specific surface area greatly increases, and boiler combustion efficiency can be improved to 99% or more, therefore it provides qualified
Coal dust it is most important.
Recommend to select low speed coal mill warehouse formula and medium-speed pulverizer direct-firing typically for the pulverized-coal fired boiler for using bituminous coal
Two kinds of pulverized coal preparation systems.Being mainly characterized by for low speed coal mill warehouse formula pulverized coal preparation system is ground qualified coal dust by low speed coal mill
It is all stored in pulverized coal bin, is then used through pulverizer coal feeder by the supply boiler combustion of fuel quantity needed for boiler.The operating condition of coal pulverizer
Direct relation between boiler operatiopn is little, ensure that the reliability of whole equipment and system.Low speed coal mill equipment is huge, electricity
Consumption is high, and abrasion are big, high noise when operation.
In the direct-firing system of medium-speed pulverizer, the qualified coal dust ground is all sent directly into burning in boiler, boiler operatiopn with
The work of coal pulverizer is closely bound up, the coal-air ratio in pulverized coal preparation system must satisfy coal pulverizer itself aerodynamic characteristics require and
The dry demand of raw coal, it is necessary to keep the reliability of coal dust pneumatic conveying and adapt to requirement of the boiler combustion to First air.Middling speed
The coal dust preparation system of mill is simple, and power consumption is low, and abrasion are small, but the pulverized coal preparation system powder leakage of operation under positive pressure is serious, and repair and maintenance amount is big,
Every boiler is both needed to a spare coal pulverizer.
Patent No. " CN204611813U ", title are the special of " the multi-functional powder feed system of warehouse formula among low speed coal mill "
A kind of Mill Systems are disclosed in benefit, although the system carries out pump drainage by powder leakage of the row powder fan to pulverized-coal collector,
Since the coal dust fineness of low speed coal mill production is not high, the coal dust of pump drainage is needed to regrind by coal pulverizer or be mixed with wind powder
It just can enter hearth combustion after coal dust mixing in clutch, the course of work is complicated, and efficiency of combustion is low, and boiler heat supplying is slow.And this is practical
Novel basic as coal-grinding using medium-speed pulverizer, though powder leakage is more, coal dust fineness is high, solves powder leakage by row powder fan and asks
Hearth combustion is inscribed and is sent directly into, the lack of gas notch setting of powder leakage is square on the burner, when coal dust falls to burner height
When, coal dust and air contact area reach maximum, guarantee that burner to its full combustion, also mentions while improving efficiency of combustion
The high heating efficiency of boiler, simplifies structure.
Utility model content
The purpose of this utility model seeks to solve the deficiency of above-mentioned background technique, provide a kind of power consumption it is low, abrasion it is small, system
The pulverized coal preparation system of the high-efficient medium-speed pulverizer warehouse formula pulverized-coal fired boiler of powder.
In order to achieve this, the pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler designed by the utility model, packet
It includes coal pulverizer, separated with the coal pulverizer wind pushing mechanism of the air inlet of coal pulverizer connection, the coal dust connected with the meal outlet of coal pulverizer
Stocking mechanism, the meal outlet powder feeding mechanism connected that stocking mechanism is separated with coal dust and the pot being connect with the meal outlet of powder feeding mechanism
Furnace, it is characterised in that: the coal pulverizer is medium-speed pulverizer, and the powder inlet of the coal dust separation stocking mechanism is connected with row's powder wind
Machine, the lack of gas spout of the meal outlet connection boiler of the row powder fan, the powder feeding mechanism include the powder out with the pulverized coal bin
The air and powder mixer of mouth connection, the air inlet of the air and powder mixer are connected with mixer wind pushing mechanism, the air and powder mixer
Meal outlet connection boiler burner, the lack of gas spout is located at the top of burner.
Specifically, the coal pulverizer wind pushing mechanism include the air inlet that one end is connected to coal pulverizer the first cool air hose and
First hot air pipe, the other end of first hot air pipe connect the air preheater in boiler tail vertical shaft.
Specifically, coal dust separation stocking mechanism include the pulverized-coal collector being connect with the meal outlet of coal pulverizer and with it is thin
The pulverized coal bin of the meal outlet connection of powder separator；The meal outlet of the coal pulverizer and the powder inlet of row powder fan are separated with fine powder
Device connection.
Specifically, the mixer wind pushing mechanism includes that one end is connected on the first hot air pipe, other end connection wind powder mixes
Second hot air pipe of the air inlet of clutch is connected on the second hot air pipe with one end, the other end connects the second cold wind of pressure fan
The air outlet of pipe, the pressure fan connects air preheater by air supply tube, and the other end of second cool air hose, which is connected to, to be sent
On air hose.
Further, recirculation conduit is connected between the meal outlet of the row powder fan and the air inlet of coal pulverizer.
Further, tertiary air pipeline, institute are connected between the meal outlet of the row powder fan and the lack of gas spout of boiler
The air inlet of one end connection coal pulverizer of recirculation conduit is stated, the other end is connected on tertiary air pipeline.
Further, primary wind pipe is connected between the meal outlet of the air and powder mixer and the burner of boiler.
Further, secondary air duct, the end connection of the secondary air duct are connected on first hot air pipe
The burner of boiler.
Specifically, the coal pulverizer is connected with feeder structure, the feeder structure includes crusher, and the crusher goes out
Coal mouth is connected with feeder, the coal feed point of the coal outlet connection coal pulverizer of the feeder.
The beneficial effects of the utility model are: 1, stage operation satisfaction difference low using medium-speed pulverizer operation power consumption
The power grid of period, which is adjusted, to be needed, and power savings are obvious；2, metal consumption is low, and grinding machine abrasion are low, only the ten of low speed coal mill
/ mono-；3, for the course of work of coal pulverizer based on squeezing action, noise is small；4, the operating condition of coal pulverizer and boiler operatiopn
It is not directly dependent upon, whole equipment and system are reliable；5, system is simple, is not necessarily to a spare coal pulverizer.Only due to whole system
There is a coal pulverizer, the coal pulverizer of stage operation stops time consuming and can sufficiently meet maintenance needs.Whole system is using closing
Formula design, without emptying after adding dedusting, meets environmental requirements, while improving coal utilization.
Detailed description of the invention
Fig. 1 is the schematic diagram of pulverized coal preparation system designed by the utility model；
Wherein, 1-crusher, 2-feeders, 3-coal pulverizers, 4-pulverized-coal collectors, 5-pulverized coal bins, 6-row's powder wind
Machine, 7-air and powder mixers, 8-boilers, 9-lack of gas spouts, 10-tertiary air pipelines, 11-primary wind pipes, 12-Secondary Airs
Pipeline, 13-burners, 14-air preheaters, 15-pressure fan, the 16-the first cool air hose, the 17-the first hot air pipe, 18-
Recirculation conduit, the 19-the second cool air hose, the 20-the second hot air pipe, 21-air supply tubes.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments.
The pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler as shown in Figure 1, including feeder structure and feeder structure
Coal outlet connection coal pulverizer 3, connect with the air inlet of coal pulverizer 3 coal pulverizer wind pushing mechanism, and coal pulverizer 3 meal outlet
The fine powder of connection separates stocking mechanism and separates the boiler 8 of the meal outlet connection of stocking mechanism with fine powder, and feeder structure includes broken
Broken machine 1, the coal outlet of crusher 1 are connected with feeder 2, the coal feed point of the coal outlet connection coal pulverizer 3 of feeder 2.Fine powder point
Include the pulverized-coal collector 4 connecting with the meal outlet of coal pulverizer 3 from stocking mechanism and is connect with the meal outlet of pulverized-coal collector 4
Pulverized coal bin 5, coal pulverizer 3 are medium-speed pulverizer, and the powder inlet of pulverized-coal collector 4 is also connected with row powder fan 6, row powder fan 6
Meal outlet connects boiler 8, and the meal outlet of pulverized coal bin 5 is connected with air and powder mixer 7, and the air inlet of air and powder mixer 7 is connected with mixed
The meal outlet of clutch wind pushing mechanism, air and powder mixer 7 connects boiler 8.Coal pulverizer wind pushing mechanism includes that one end is connected to coal pulverizer 3
Air inlet the first cool air hose 16 and the first hot air pipe 17, the other end of the first hot air pipe 17 connects 8 tail vertical well of boiler
Interior air preheater 14.Mixer wind pushing mechanism includes that one end is connected on the first hot air pipe 17, other end connection wind powder mixes
Second hot air pipe 20 of the air inlet of clutch 7 is connected on the second hot air pipe 20 with one end, the other end connects the of pressure fan 15
The air outlet of two cool air hoses 19, pressure fan 15 connects air preheater 14, the other end of the second cool air hose 19 by air supply tube 21
It is connected on air supply tube 21.Recirculation conduit 18 is connected between the meal outlet of row powder fan 6 and the air inlet of coal pulverizer 3.Row
Tertiary air pipeline 10 is connected between the meal outlet of powder blower 6 and the lack of gas spout 9 of boiler 8, lack of gas spout 9 is located at boiler 8
The top of burner 13.The air inlet of one end connection coal pulverizer 3 of recirculation conduit 18, the other end are connected to tertiary air pipeline 10
On.Primary wind pipe 11 is connected between the meal outlet of air and powder mixer 7 and the burner 13 of boiler 8.On first hot air pipe 17
It is connected with secondary air duct 12, the burner 13 of the end connection boiler 8 of secondary air duct 12.
Crusher 1, feeder 2, coal pulverizer 3, pulverized-coal collector 4, pulverized coal bin 5, row powder fan 6, air and powder mixer 7 and pot
Furnace 8 is existing apparatus, and above-mentioned apparatus is attached by the utility model, and reasonable Arrangement is new boiler combustion system.
Pulverized coal preparation system designed by the utility model carries out powder processed using a medium-speed pulverizer, and coal dust first passes through crusher
Medium-speed pulverizer is sent by feeder 2 after 1 processing.When opening mill, desiccant needed for medium-speed pulverizer passes through the first hot air duct
17 add the first cold air duct 16 to mix, and the first hot air duct 17 is connected to the air preheater for being arranged in 8 tail vertical well of boiler
14 outlet conduits, the first cold air duct 16 are connected to the entrance of coal pulverizer 3.Coal dust is after drying, grinding, qualified pulverized coal borne air flow warp
The outlet of medium-speed pulverizer enters pulverized-coal collector 4 and carries out secondary separation, and most of coal dust enters pulverized coal bin 5 after separation, contains
After powder air-flow passes through row powder fan 6, a part enters medium-speed pulverizer conduct by recirculation conduit 18 as recycling lack of gas
Desiccant, another part are burnt by tertiary air pipeline 10 into burner 13 as tertiary air.5 lower disposed of pulverized coal bin
There is air and powder mixer 7, by another part hot wind by the second hot air pipe 20 and the cold wind sent from pressure fan 15 through the second cold wind
Pipe 19 is mixed into Wen Fenghou, carries out powder feeding by air and powder mixer 7, enters burner by primary wind pipe 11 as First air
13 burn.Part III hot wind is matched as Secondary Air by being directly entered burner 13 by secondary air duct 12
Wind meets the oxygen amount that the coal dust after burning in boiler 8 needs.When guarantee boiler 8 burns required fineness of pulverized coal, mill
The boiler oil consumption that the nominal output of coal machine 3 is about 1.5~2 times.Under the action of row powder fan 6, it is ensured that coal-grinding
It is negative pressure in machine 3 and powder feed system, no powder leakage.
It carries out stopping mill operation after the coal dust in pulverized coal bin 5 reaches limit level, row powder fan 6 is stopped transport, the first cool air hose
16, the valve on the first hot air pipe 17 and recirculation conduit 18 is turned off, and is led to by a part of hot wind that air preheater 14 is sent
It crosses the second hot air pipe 20 and the cold wind sent from pressure fan 15 and is mixed into Wen Fenghou through the second cool air hose 19, pass through air and powder mixer
7 carry out powder feeding, are burnt by primary wind pipe 11 into burner 13 as First air.Another part hot wind is as secondary
Wind carries out air distribution by being directly entered burner 13 by secondary air duct 12, meets the coal dust after burning needs in boiler 8
Oxygen amount.
In the utility model, the medium-speed pulverizer that coal pulverizer 3 selects rated power to be greater than boiler combustion consumption is ground
Coal operation, can be directly entered in boiler 8 by the powder leakage that medium-speed pulverizer generates and be burnt, to ensure efficiency of combustion, by lack of gas spout 9
It is arranged above burner 13, it is maximum from the air contact area in the coal dust and boiler 8 that lack of gas spout 9 sprays, when under coal dust
When dropping down onto the height of burner 13, burner 13 can carry out full combustion to coal dust, be effectively ensured from coal pulverizer 3 and be directly entered
Combustion Efficiency of Coal Powder in boiler 8.Since the rated power of coal pulverizer 3 is greater than boiler combustion consumption, when coal pulverizer 3 stops
When machine overhauling, the coal dust in pulverized coal bin 5 can be sent into boiler 8 by air and powder mixer 7 and mixer wind pushing mechanism and burnt, wait grind
After coal machine 3 overhauls, restarting can supplement the coal dust of pulverized coal bin 5, the highest powder processed of realization system and efficiency of combustion.
The downtime of artificial optional coal pulverizer 3, cost of making rational planning for, practical, good economy performance.
The above descriptions are merely preferred embodiments of the present invention, not does to the structure of the utility model any
Formal limitation.It is any simple modification made by the above technical examples according to the technical essence of the present invention, equivalent
Variation and modification, in the range of still falling within the technical solution of the utility model.
Claims (8)
1. a kind of pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler, the air inlet including coal pulverizer (3) and coal pulverizer (3)
The coal pulverizer wind pushing mechanism of mouth connection separates stocking mechanism with the coal dust that the meal outlet of coal pulverizer (3) connects, separates storage with coal dust
The boiler (8) depositing the powder feeding mechanism of the meal outlet connection of mechanism and being connect with the meal outlet of powder feeding mechanism, it is characterised in that: described
Coal pulverizer (3) is medium-speed pulverizer, and the powder inlet of the coal dust separation stocking mechanism is connected with row powder fan (6), row's powder
The lack of gas spout (9) of meal outlet connection boiler (8) of blower (6), the powder feeding mechanism include connecting with the meal outlet of pulverized coal bin (5)
The air and powder mixer (7) connect, the air inlet of the air and powder mixer (7) are connected with mixer wind pushing mechanism, the wind powder mixing
The burner (13) of meal outlet connection boiler (8) of device (7), the lack of gas spout (9) are located at the top of burner (13).
2. the pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler as described in claim 1, it is characterised in that: the coal-grinding
Machine wind pushing mechanism includes the first cool air hose (16) and the first hot air pipe (17) for the air inlet that one end is connected to coal pulverizer (3),
Air preheater (14) in other end connection boiler (8) tail vertical well of first hot air pipe (17).
3. the pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler as described in claim 1, it is characterised in that: the coal dust
Separation stocking mechanism includes the pulverized-coal collector (4) connecting with the meal outlet of coal pulverizer (3) and the powder out with pulverized-coal collector (4)
The pulverized coal bin (5) of mouth connection；
The meal outlet of the coal pulverizer (3) and the powder inlet of row powder fan (6) are connect with pulverized-coal collector (4).
4. the pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler as claimed in claim 2, it is characterised in that: the mixing
Device wind pushing mechanism include one end be connected on the first hot air pipe (17), the air inlet of other end connection air and powder mixer (7) the
Two hot air pipes (20) are connected on the second hot air pipe (20) with one end, the other end connects the second cool air hose of pressure fan (15)
(19), the air outlet of the pressure fan (15) passes through air supply tube (21) connection air preheater (14), second cool air hose
(19) the other end is connected on air supply tube (21).
5. the pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler as described in claim 1, it is characterised in that: row's powder
Recirculation conduit (18) are connected between the meal outlet of blower (6) and the air inlet of coal pulverizer (3).
6. the pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler as claimed in claim 5, it is characterised in that: row's powder
Tertiary air pipeline (10), the recirculation conduit are connected between the meal outlet of blower (6) and the lack of gas spout (9) of boiler (8)
(18) air inlet of one end connection coal pulverizer (3), the other end are connected on tertiary air pipeline (10).
7. the pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler as described in claim 1, it is characterised in that: the wind powder
Primary wind pipe (11) are connected between the meal outlet of mixer (7) and the burner (13) of boiler (8).
8. the pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler as claimed in claim 2, it is characterised in that: described first
It is connected on hot air pipe (17) secondary air duct (12), the burner of end connection boiler (8) of the secondary air duct (12)
(13)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820476465.8U CN208398113U (en) | 2018-04-04 | 2018-04-04 | A kind of pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820476465.8U CN208398113U (en) | 2018-04-04 | 2018-04-04 | A kind of pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208398113U true CN208398113U (en) | 2019-01-18 |
Family
ID=65064347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820476465.8U Active CN208398113U (en) | 2018-04-04 | 2018-04-04 | A kind of pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208398113U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443907A (en) * | 2018-04-04 | 2018-08-24 | 武汉武锅能源工程有限公司 | A kind of pulverized coal preparation system and its milling method of medium-speed pulverizer warehouse formula pulverized-coal fired boiler |
-
2018
- 2018-04-04 CN CN201820476465.8U patent/CN208398113U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443907A (en) * | 2018-04-04 | 2018-08-24 | 武汉武锅能源工程有限公司 | A kind of pulverized coal preparation system and its milling method of medium-speed pulverizer warehouse formula pulverized-coal fired boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103216840B (en) | Formula of storing up in coal-burning boiler coal pulverizer reduces nitric oxide system | |
| CN209495349U (en) | A kind of biomass molding fuel and coal direct-coupling pulverized coal preparation system | |
| CN203223912U (en) | Intermediate storage type super nitrogen reduction system for coal-fired boiler coal mill | |
| CN203687076U (en) | Intermediate storage type hot primary air heat exchanging type returned pulverized coal milling and coal pulverizing system of coal fired boiler | |
| CN104344398B (en) | Middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system | |
| CN208475369U (en) | Coal-burning boiler pulverized coal preparation system | |
| CN104180384B (en) | Coal-fired power station boiler mixes the System and method for burning low ash smelting point coal | |
| CN101725994B (en) | Exhaust gas and hot-blast air dual-medium powder feeding system | |
| CN208398113U (en) | A kind of pulverized coal preparation system of medium-speed pulverizer warehouse formula pulverized-coal fired boiler | |
| CN210638067U (en) | Stable combustion energy-saving efficiency-improving system for boiler of thermal power plant | |
| CN108443907A (en) | A kind of pulverized coal preparation system and its milling method of medium-speed pulverizer warehouse formula pulverized-coal fired boiler | |
| CN103836636B (en) | A kind of device reducing heat primary air cold wind incorporation efficiency | |
| CN102330972B (en) | Powder body combustion system of industrial kiln | |
| CN203586193U (en) | Middle storing bin type hot wind powder feeding and manufacturing system | |
| CN205717287U (en) | Hot blast and exhaust gas double-medium powder delivery efficient boiler combustion apparatus | |
| CN202630049U (en) | Pulverized coal burner | |
| CN116123558A (en) | Direct-fired utilization system of quality-improving gasification fine slag pulverized coal furnace and operation method thereof | |
| CN201589289U (en) | Exhaust gas and hot air double-medium powder delivery system | |
| CN202709087U (en) | Automatic pulverized coal combustion system | |
| CN202037125U (en) | Online pulverized coal refining separation device | |
| CN202008138U (en) | Lean coal rotational-flow combustor | |
| CN102679339B (en) | Pulverized coal burner | |
| CN211502754U (en) | Uniform coal feeding device for CFB boiler | |
| CN204404215U (en) | Utilize the system of adjacent stove negative pressure bug dusting warehousing powder | |
| CN113757713B (en) | Powder making system of graded combustion furnace smoke mixing drying fan coal mill for power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |