CN207563059U - A kind of coal dust preparation system - Google Patents
A kind of coal dust preparation system Download PDFInfo
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- CN207563059U CN207563059U CN201721539910.2U CN201721539910U CN207563059U CN 207563059 U CN207563059 U CN 207563059U CN 201721539910 U CN201721539910 U CN 201721539910U CN 207563059 U CN207563059 U CN 207563059U
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- coal
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- lime set
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- 239000002817 coal dust Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000003245 coal Substances 0.000 claims abstract description 117
- 239000007789 gas Substances 0.000 claims abstract description 64
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 45
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 45
- 239000004571 lime Substances 0.000 claims abstract description 45
- 238000011084 recovery Methods 0.000 claims abstract description 35
- 238000002485 combustion reaction Methods 0.000 claims abstract description 29
- 239000002737 fuel gas Substances 0.000 claims abstract description 10
- 238000004064 recycling Methods 0.000 claims abstract description 7
- 239000012895 dilution Substances 0.000 claims description 10
- 238000010790 dilution Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000003034 coal gas Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Disintegrating Or Milling (AREA)
Abstract
The utility model belongs to coal chemical technology, provides a kind of coal dust preparation system, including coal pulverizer, coal collector, pulverized coal storehouse, circulating fan, hot-blast stove, heat exchange and lime set recovery system and combustion air fan.The system of the utility model, which passes through the hot gas after detaching coal dust, with combustion air exchange heat and arranges outside again after recycling lime set air, take full advantage of the tow taste heat of this part efflux gas, improve the temperature into the combustion air of system, so as to further reduce the consumption of fuel gas, system energy consumption recovery section water simultaneously is reduced.
Description
Technical field
The utility model belongs to coal chemical technology, is related to coal dust preparation system.
Background technology
The pulverized coal preparation process in Modern Coal-based Chemical field is typically that raw coal is delivered to coal pulverizer, and hot-blast stove heats air
It is delivered in coal pulverizer, is milled and is dried to raw coal, after coal collector detaches, coal dust is sent to fine coal for coal dust and gas
Storehouse, gas are directly discharged into through circulating fan outlet rear portion in air.This portion of exhaust gas flow is larger and is full of water, such as
Pulverized coal preparation flow discharge gas amount is in 35000-55000Nm used in the unit of Ningxia3/ h, temperature >=100 DEG C, more than a large amount of low temperature
Heat is wasted, and a large amount of water is fallen by direct emission.At the same time, regional (e.g., the Ningxia) winter temperature of most of producing coal down to-
30 DEG C, the air at a temperature of this is conveyed into coal mill system through hot-blast stove to be needed to consume a large amount of heat, thus fuel gas is caused to be used
Amount increases.
Therefore, there is a need in the art for the technique and system for improving pulverized coal preparation, to solve energy consumption in the prior art
The problem of amount is big, and energy waste is high.
Invention content
The content of the utility model is to provide a kind of coal dust preparation system regarding to the issue above, can efficiently use heat,
It is energy-saving.
The coal dust preparation system of the utility model include coal pulverizer, coal collector, pulverized coal storehouse, circulating fan, hot-blast stove,
Heat exchange and lime set recovery system and combustion air fan, wherein,
The raw coal entrance of coal pulverizer is connect with run coal bin, and material outlet is connect with coal collector, air inlet one and hot wind
Stove connects；
The material inlet of coal collector is connect with coal pulverizer, and discharge is connect with pulverized coal storehouse, gas vent and cycle
Wind turbine connects；
The gas access of circulating fan is connect with coal collector, and gas vent one is connect with hot-blast stove, gas vent two
It is connect with heat exchange and lime set recovery system；
The gas access one of heat exchange and lime set recovery system is connect with circulating fan, and gas access two connects with combustion air fan
It connects, gas vent one is connect with hot-blast stove, and gas vent two is connected with air；The heat exchange and lime set recovery system are additionally provided with
Lime set recycling outlet；
Hot-blast stove is connect respectively with circulating fan, heat exchange and lime set recovery system and coal pulverizer, and is provided with fuel gas and is entered
Mouthful.
Preferably, dilution air is additionally provided in the connecting pipeline of circulating fan and hot-blast stove, for defeated to hot-blast stove
Send air.
Preferably, the system is additionally provided with seal fan, and the air outlet of seal fan is connect with coal pulverizer air inlet two,
For carrying out gas seal protection to the rotary part of coal pulverizer.
Preferably, regulating valve is provided between circulating fan and heat exchange and lime set recovery system, for adjusting gas flow.
Preferably, screw conveyor is provided between the coal collector and pulverized coal storehouse, for coal dust to be received from coal dust
Storage is delivered to pulverized coal storehouse.
Preferably, the coal pulverizer is roller ring mill, and upper part is provided with the separation of rotary or sound combined type
Device.
Preferably, the coal collector is the large-scale long explosion-proof bag filter of bag low pressure injection.
Preferably, the heat exchange and lime set recovery system are made of heat-exchange system and lime set recovery system, wherein, it is described to change
Hot systems have tubular heat exchanger structure, and the lime set recovery system is the cyclone separator with deflector.
Preferably, the combustion air fan, seal fan and dilution air are centrifugal fan.
The coal dust preparation system of the utility model can by the gas pressurized rear portion separated from circulating fan into
Enter hot-blast stove and reheat utilization, a part enters heat exchange and lime set recovery system, and the gas come with combustion air fan conveying such as fires
It burns air, seal gas, diluent air etc. to carry out heat exchange first and be discharged into air again after recycling lime set, improves combustion air
Temperature, reduce combustion air and heat up consumed heat, recycled part water, realized the utilization of low temperature exhaust heat and energy saving drop
The purpose of consumption.
Description of the drawings
Fig. 1 is the structure diagram of the coal dust preparation system of the utility model, wherein, 1 is run coal bin, and 2 be coal pulverizer, 3
It is coal collector, 4 be circulating fan, and 5 be hot-blast stove, and 6 be heat exchange and lime set recovery system, and 7 be combustion air fan, and 8 be fine coal
Storehouse, 9 be seal fan, and 10 be dilution air, and 11 be regulating valve, and 12 be screw conveyor.
Specific embodiment
The utility model is further illustrated below in conjunction with the drawings and specific embodiments, but the content of the utility model is not
It is limited to this.
Those skilled in the art can unambiguously know that the connection between each device is closed according to the content of this specification
Material convergence process when system and mode and work between each device.
As shown in Figure 1, the coal dust preparation system of the utility model includes coal pulverizer 1, coal collector 3, pulverized coal storehouse 8, follows
Ring wind turbine 4, hot-blast stove 5, heat exchange and lime set recovery system 6 and combustion air fan 7.
The effect of coal pulverizer is ground under the drying for the hot gas for coming the raw coal that run coal bin conveying comes in hot-blast stove conveying
It grinds to obtain coal dust.The raw coal entrance of coal pulverizer 2 is connect with run coal bin 1, for receiving raw coal；The material outlet of coal pulverizer 2 with
The material inlet connection of coal collector 3.The air inlet one of coal pulverizer 2 is connect with hot-blast stove 5, is come for receiving hot-blast stove conveying
Hot-air；The air inlet two of coal pulverizer 2 is connect with seal fan 9, and seal fan 9 carries the crucial rotary part of coal pulverizer 2
For gas seal protection.
In the present embodiment, coal pulverizer is roller ring mill, and upper part is provided with rotary or sound combined type
Separator.In other embodiments, coal pulverizer can be other models.
The effect of coal collector is to receive coal pulverizer treated coal dust and gas, and the two is detached, and is respectively returned
It receives.Wherein, the material inlet of coal collector 3 is connect with coal pulverizer 2, receives coal dust and gas；Discharge connects with pulverized coal storehouse 8
It connects, the coal dust being collected into is delivered to pulverized coal storehouse 8；The gas vent of coal collector 3 is connect with circulating fan 4.Coal powder collection
Screw conveyor 12 can be provided between device 3 and pulverized coal storehouse 8, for coal dust preferably to be delivered to fine coal from coal collector
Storehouse.
In the present embodiment, coal collector is the large-scale long explosion-proof bag filter of bag low pressure injection.In other implementations
In mode, coal collector can be other coal collectors that can be played and collect coal dust, detach gas.
The gas access of circulating fan 4 is connect with coal collector 3, and gas vent one is connect with hot-blast stove 5, will be a part of
The gas separated is delivered in hot-blast stove；Gas vent two is connect with heat exchange and lime set recovery system, by another part point
The gas separated out is delivered to progress heat exchange in heat exchange and lime set recovery system and comes out.
Regulating valve 11 can be set between circulating fan 4 and heat exchange and lime set recovery system 6, for controlling gas flow.
Heat exchange and the effect of lime set recovery system are a part of gas and burning wind that will be separated from coal collector
Such as combustion air gas that machine conveying comes exchanges heat so that heat is transferred to the gas for needing to heat from exhaust gas, so as to close
It manages, effectively utilize the lime set collection of low temperature exhaust heat and the acquisition that will exchange heat with reuse.Heat exchange and the gas of lime set recovery system 6
Body entrance one is connect with circulating fan 4, for receiving the gas that circulating fan transfer comes；Gas access two connects with combustion air fan 7
It connects, for receiving next combustion air of combustion air fan conveying etc., with detaching gas converting heat.Gas vent one connects with hot-blast stove
It connects, the gas that combustion air fan conveying comes further is delivered to hot-blast stove；Gas vent two is connected with air, future self-circulating wind
The separation gas of machine is discharged into air after lime set recycling.In addition, being additionally provided with lime set recycling outlet, recycled for lime set.
Heat exchange and lime set recovery system are made of heat-exchange system and lime set recovery system, and those skilled in the art can basis
The needs of description select suitable heat-exchange system and lime set recovery system.In the present embodiment, heat-exchange system has shell and tube
Heat exchanger structure, lime set recovery system are the cyclone separator with deflector.
The effect of hot-blast stove is that fuel gas and burning gases etc. are carried out Hybrid Heating, generates hot gas, into coal pulverizer,
Raw coal and coal dust are heated.Hot-blast stove 5 is connect respectively with circulating fan 4, heat exchange and lime set recovery system 6, receives separation
Gas and combustion air etc.；It is connect with coal pulverizer 2, conveys the hot wind of generation；Fuel gas entrance is provided with, receives fuel gas.
Dilution air 10 can be set in the connecting pipeline of circulating fan 4 and hot-blast stove 5, it is dilute for being conveyed to hot-blast stove 5
Air is released, circulating air water content is adjusted, controls dew point.
It will be appreciated by those skilled in the art that the combustion air fan referred in the utility model, seal fan and dilution air
Meaning.From cost and convenient for safeguarding that angle considers that in the present embodiment, combustion air fan, seal fan and dilution air are
Centrifugal fan.
Using the utility model coal dust preparation system when, hot-blast stove by hybrid reactions such as fuel gas and combustion airs, with
A part of recyclegas mixing that coal collector is separated, is sent into coal pulverizer together；Raw coal enters coal pulverizer from run coal bin,
It is milled under the action of hot gas and dry.The coal dust and admixture of gas of generation enter coal collector, after separation, coal dust warp
Pulverized coal storehouse is sent by screw conveyor, gas enters circulating fan.After circulating fan pressurizes, a part of gas and dilution air
The air of conveying enters hot-blast stove together, recycles, and another part enters heat exchange and lime set under the flow control of regulating valve
Recovery system exchanges heat, and collect lime set with the combustion air of combustion air fan conveying, is then vented.Combustion air is through heat exchange
Enter hot-blast stove afterwards, with fuel solid/liquid/gas reactions, generate hot gas, the separation gas of cycle enters coal pulverizer together.
Embodiment
Raw coal enters coal pulverizer from run coal bin through coal spout, the hot gas of the temperature of origin self-heating wind furnace at 280-340 DEG C
Heat drying simultaneously enters with hot gas in coal collector after grinding, gentle by cloth-bag type coal collector separation coal dust
Body, coal dust fall under gravity into screw conveyor and are sent to pulverized coal bin；Existing containing the temperature compared with juicy after separation coal dust
100-120 DEG C of hot gas is partly sent to hot-blast stove, and blow with dilution air in the entrance of hot-blast stove after circulating fan pressurizes
Enter hot-blast stove after mixing jointly, the heat smoke after burning with fuel gas is mixed to 280-340 DEG C, into coal pulverizer；Another portion
Divide hot gas valve control flow after the adjustment, first pass through heat exchange and lime set recovery system heats the air-supply of combustion air fan, recycle
It is vented after heat and part water with the water content of control system, the combustion air fan air-supply after heating enters hot-blast stove and fuel gas
It is mixed and burned.
Pass through the system of the utility model, with separate unit coal pulverizer treating capacity 90t/h, full water content 20% in coal, after dry
Lime set recovery system year recovering liquid water reach 4%, lime set organic efficiency is 30%, and the operating time in year is 8000h meters, every year
Recyclable liquid water 34560t.93312 yuan of purchase fresh water expense can be saved every year.According to measuring and calculating, if an enterprise is for coal list
Member is provided with 4 and opens 2 standby totally 6 coal pulverizers, and can recycle water by the system of the utility model every year reaches 138240t.
In addition, combustion air temperature can be promoted after heat exchange by the system of the utility model, 50 DEG C are promoted with winter,
Summer promotes 30 DEG C, and annual promotes 40 DEG C, combustion-supporting air quantity 15000Nm3/ h is counted, and can save low-grade fuel tolerance in year
2400000Nm3, 4 coal pulverizers, which are run, reduces about 480,000 yuan of cost year.
Claims (9)
1. a kind of coal dust preparation system, which is characterized in that including coal pulverizer, coal collector, pulverized coal storehouse, circulating fan, hot wind
Stove, heat exchange and lime set recovery system and combustion air fan, wherein,
The raw coal entrance of coal pulverizer is connect with run coal bin, and material outlet is connect with coal collector, and air inlet one connects with hot-blast stove
It connects；
The material inlet of coal collector is connect with coal pulverizer, and discharge is connect with pulverized coal storehouse, gas vent and circulating fan
Connection；
The gas access of circulating fan is connect with coal collector, and gas vent one is connect with hot-blast stove, and gas vent two is with changing
Heat and the connection of lime set recovery system；
The gas access one of heat exchange and lime set recovery system is connect with circulating fan, and gas access two is connect with combustion air fan, gas
Body outlet one is connect with hot-blast stove, and gas vent two is connected with air；The heat exchange and lime set recovery system are additionally provided with lime set
Recycling outlet；
Hot-blast stove is connect respectively with circulating fan, heat exchange and lime set recovery system and coal pulverizer, and is provided with fuel gas entrance.
2. system according to claim 1, which is characterized in that also set up in the connecting pipeline of circulating fan and hot-blast stove
There is dilution air, for conveying air to hot-blast stove.
3. system according to claim 2, which is characterized in that the system is additionally provided with seal fan, seal fan
Air outlet is connect with coal pulverizer air inlet two, for carrying out gas seal protection to the rotary part of coal pulverizer.
4. system according to claim 3, which is characterized in that between the circulating fan and heat exchange and lime set recovery system
Regulating valve is provided with, for adjusting gas flow.
5. system according to claim 4, which is characterized in that be provided with spiral between the coal collector and pulverized coal storehouse
Conveyer, for coal dust to be delivered to pulverized coal storehouse from coal collector.
6. according to Claims 1 to 5 any one of them system, which is characterized in that the coal pulverizer is roller ring mill,
Upper part is provided with rotary or sound Combined separator.
7. according to Claims 1 to 5 any one of them system, which is characterized in that the coal collector is low for large-scale long bag
Pressure is blown explosion-proof bag filter.
8. according to Claims 1 to 5 any one of them system, which is characterized in that the heat exchange and lime set recovery system are by changing
Hot systems and lime set recovery system composition, wherein, the heat-exchange system has tubular heat exchanger structure, the lime set recycling system
It unites as the cyclone separator with deflector.
9. according to Claims 1 to 5 any one of them system, which is characterized in that the combustion air fan, seal fan and dilution
Wind turbine is centrifugal fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721539910.2U CN207563059U (en) | 2017-11-16 | 2017-11-16 | A kind of coal dust preparation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721539910.2U CN207563059U (en) | 2017-11-16 | 2017-11-16 | A kind of coal dust preparation system |
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| Publication Number | Publication Date |
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| CN207563059U true CN207563059U (en) | 2018-07-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468146A (en) * | 2018-12-25 | 2019-03-15 | 河南开祥精细化工有限公司 | A kind of gasification furnace mill coal drying air burning feed system |
| CN112283735A (en) * | 2020-11-19 | 2021-01-29 | 西安热工研究院有限公司 | A centralized pulverizing system for high-moisture lignite coal |
| CN114130519A (en) * | 2021-11-23 | 2022-03-04 | 中国华能集团清洁能源技术研究院有限公司 | An automatic control system and method for the humidity of dry pulverized coal dense phase conveying and grinding coal |
| CN115645780A (en) * | 2022-09-16 | 2023-01-31 | 华中科技大学 | Pulverized coal bunker explosion-proof combustion-inhibiting system of deep peak shaving coal-fired boiler |
-
2017
- 2017-11-16 CN CN201721539910.2U patent/CN207563059U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468146A (en) * | 2018-12-25 | 2019-03-15 | 河南开祥精细化工有限公司 | A kind of gasification furnace mill coal drying air burning feed system |
| CN112283735A (en) * | 2020-11-19 | 2021-01-29 | 西安热工研究院有限公司 | A centralized pulverizing system for high-moisture lignite coal |
| CN114130519A (en) * | 2021-11-23 | 2022-03-04 | 中国华能集团清洁能源技术研究院有限公司 | An automatic control system and method for the humidity of dry pulverized coal dense phase conveying and grinding coal |
| CN115645780A (en) * | 2022-09-16 | 2023-01-31 | 华中科技大学 | Pulverized coal bunker explosion-proof combustion-inhibiting system of deep peak shaving coal-fired boiler |
| CN115645780B (en) * | 2022-09-16 | 2023-12-12 | 华中科技大学 | A kind of anti-explosion and flame suppression system for pulverized coal bunker of deep peak-shaving coal-fired boiler |
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