CN102430310B - Method for recycling fine coal particles - Google Patents
Method for recycling fine coal particles Download PDFInfo
- Publication number
- CN102430310B CN102430310B CN201110324202.8A CN201110324202A CN102430310B CN 102430310 B CN102430310 B CN 102430310B CN 201110324202 A CN201110324202 A CN 201110324202A CN 102430310 B CN102430310 B CN 102430310B
- Authority
- CN
- China
- Prior art keywords
- coal
- coal charge
- gas
- separation
- dust
- 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
Images
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to a method for recycling fine coal particles, comprising two functional sections: coal material pre-separating section and smoke purifying and discharging section. An air inlet static pressure tank is arranged in the inner part of the coal material pre-separating section, and the bottom part is provided with a coal material pre-separating cabin. The smoke purifying and discharging section is arranged at the two sides of the tank body of the coal material pre-separating section and communicates with the tank body of the coal material pre-separating section. The structure comprises a flow guide plate, a filtering bag, an air purifying static pressure tank and a fine particle recycling cabin. The air comprising dust with high-density and large smoke volume is firstly pre-separated through the coal material pre-separating cabin, later over 90% of coal powder is collected, and 10% of air comprising the coal dust is uniformly distributed on the surface of the filtering bag on the middle part of the tank body after passing through the flow guide plate and pre-separating the large coal particles, so the air comprising dust with high-density is prevented from directly scouring the filtering bag, the recycling rate of devices for recycling the fine coal particles is improved, and the service time of the filtering bag is prolonged at the same time.
Description
Technical field
The present invention relates to a kind of method for recycling fine coal particles, the coal humidifying technology that the method and coke oven flue waste gas are thermal source is supporting, is mainly used in reclaiming the fine-particle coal that coal damping machine exit flow carries, to it is got back in coke making process, comes into operation.
Background technology
Third generation coal conditioning technique be take coke oven flue waste gas as thermal source, utilizes the operation principle of fluid bed, makes feed coal and hot flue gas abundant contact heat-exchanging in coal damping machine of large water capacity, removes the moisture in coal charge.This coal moisture control process system tail flue gas has following characteristics:
1. in the tail flue gas of outflow coal damping machine, coal dust content is larger.In mixed coal after coal preparation technology pulverizer is pulverized, the coal charge that grain size category is less than 0.5mm accounts for 42% of total coal charge amount, and this part fine-particle coal major part belongs to the coal charge of Gao Pinxiang, belongs to coking high-quality coal., the evenly object of damping efficient for realizing, most of feed coal in coal damping machine all in fluidized state.Feed coal in coal damping machine after super-dry, most damping coal can flow out from the damping coal export of coal damping machine bottom, some fine-particle coal flows out damping machine with tail flue gas, and these coal charges more than 90% are less than the coal charge of 0.5mm for grain size category.In the situation that feed coal comes coal humidity lower, can be up to 200g/Nm containing fine breeze amount in tail flue gas
3, account for and need 20% of the feed coal of damping total amount.The height of this part coal charge organic efficiency directly affects coal humidity controlling system operational efficiency, and affects the coke making process quality of production and cost;
2. the tail flue gas dew-point temperature that flows out coal damping machine is higher, and generally 50～60 ℃ of left and right, tail flue gas temperature exceeds 10 ℃ of left and right than flue gas dew point temperature;
3. fine breeze activity degree is higher, and oxidation reaction very easily occurs, and the viscosity of fine breeze is larger;
4. the coal dust water capacity in tail flue gas reaches as high as 4%, minimumly reaches 1%, and fine breeze mobility is splendid, but under this humidity, swollen material phenomenon very easily appears in coal dust, causes ash silo discharge not smooth;
5. the concentration of lower explosive limit of coal dust is 33～45g/m
3, and can be up to 200g/Nm containing fine breeze amount in tail flue gas
3; For the generation of prevent exploding accident, system has stricter restriction to oxygen content;
6. coal humidity controlling system processing coal charge amount is larger, and maximum can reach 350t/h, and tail flue gas amount maximum can reach 550000m
3/ h;
Based on above-mentioned several reasons, fine-particle coal reclaims and is very important, and while using in coal humidity controlling system, not only wants high efficiente callback fine powdered coal, improves the coal dust rate of recovery, will farthest avoid the generation of security incident simultaneously.
Summary of the invention
The object of this invention is to provide a kind of method for recycling fine coal particles, the method can high efficiente callback coal humidity controlling system tail flue gas in entrained fine breeze, guarantee coal humidity controlling system safety, stable, efficiently operation simultaneously.
For achieving the above object, the present invention is achieved through the following technical solutions:
A method for recycling fine coal particles, comprises the following steps:
1) device for recovering fine-particle coal comprises coal charge pre-separation section and two functional sections of gas cleaning discharge section, coal charge pre-separation section and gas cleaning discharge section are the body structure that bottom is provided with ash silo, coal charge pre-separation intersegmental part is provided with air admission static pressure case, bottom is coal charge pre-separation storehouse, air admission static pressure lower box part is provided with a plurality of exhaust gases passes, and exhaust gases passes is provided with pneumatic control valve; Gas cleaning discharge section is arranged in the both sides of coal charge pre-separation section casing and communicates with coal charge pre-separation section casing, structure comprises air flow guiding plate, filter bag, pure qi (oxygen) plenum chamber, fine grained recovery bin, air flow guiding plate is arranged at a side of closing on coal charge pre-separation section, filter bag is arranged in the casing of gas cleaning discharge section, bottom is provided with fine grained recovery bin, pure qi (oxygen) plenum chamber is arranged at filter bag top and communicates with filter bag inside, and pure qi (oxygen) plenum chamber pure qi (oxygen) exit is provided with Pneumatic off-line valve;
2) dusty gas enters air admission static pressure case by smoke inlet pipe, by being arranged at the pneumatic control valve of air admission static pressure lower box part, regulate flue gas to enter after the air quantity of each bin of pre-separation storehouse, dusty gas enters coal charge pre-separation storehouse and carries out coal charge pre-separation, in coal charge pre-separation storehouse, most of coal charge in dusty gas is separated from the gas under the effect of deadweight, falls into bottom ash silo; Minority coal charge enters with air-flow in the casing of both sides, in gas cleaning discharge section, further carries out the separated of coal charge and gas again;
3) enter first contacting with air flow guiding plate containing the gas of a small amount of coal charge of gas cleaning discharge section, after air flow guiding plate contact-impact, bulky grain coal dust is directly fallen the fine grained recovery bin of bottom half under effect of inertia, tail wind is through the water conservancy diversion of air flow guiding plate, be evenly distributed on the outer surface of filter bag in casing, contain coal dust flue dust bag filtration after filtration, coal dust become trapped in the outer surface of filter bag, by the regular nitrogen-blow of pulse spraying equipment, the duff dust that filter bag outer surface is trapped blows off to fine grained recovery bin; Purified gas enters pure qi (oxygen) plenum chamber and drains into atmosphere through pure qi (oxygen) outlet, smoke exhaust fan;
4) coal dust that coal charge pre-separation storehouse and fine grained recovery bin are collected returns in coal preparation technology flow process by the airtight ash discharge and the conveying equipment dispatch that are attached thereto.
Each described ash silo is equipped with accident condition nitrogen filled protection device and the anti-swollen materials device of ash silo.
Described gas cleaning discharge section casing sidepiece is provided with explosion venting valve.
Device for recovering fine-particle coal Whole Equipment is set up defences and is stopped the insulation construction layer of tail flue gas dewfall.
Compared with prior art, the invention has the beneficial effects as follows:
1. the efficiency that reclaims fine-particle coal is high, and after this device reclaims, exhaust emissions concentration can be reduced to 15mg/Nm
3;
2. device interior is established coal charge pre-separation storehouse and labyrinth type air flow guiding plate, can process the dusty gas of high dust content, Wind Volume, can efficiently trap more than 90% coal dust being mixed in tail flue gas, not only improve equipment arresting efficiency, reduce the dusty gas concentration that filter bag filters simultaneously, can extend life of bag filter, eliminate safe hidden trouble simultaneously;
3. device interior does not have laying dust dead angle, and corner surfaces all adopts arcuate structure; Ash silo tapering is not less than 70 °; At each ash silo swollen materials device of all setting up defences, can be rapidly, effectively the coal dust of collecting is discharged to device for recovering fine-particle coal;
4. pair device for recovering fine-particle coal is taked Insulation, avoids tail flue gas at device for recovering fine-particle coal internal condensation, effectively prevents not smooth due to the bonding ash silo sidewall of coal dust, ash discharge, to occur the security incident that oxidation reaction causes generation;
5. each ash silo of device for recovering fine-particle coal is all established material level and is taken into account temperature-detecting device, is reported to the police, detected the means such as ash silo coal dust temperature by ash silo upper limit material level, and detecting in deduster ash silo has coal dust free to pile up, and whether occurs oxidation reaction.Once detect, in ash silo, coal dust temperature is higher than flue-gas temperature, and system will be sent alarm signal, starts accident condition nitrogen charging device simultaneously and fills nitrogen to ash silo inside, prevents that the state of affairs from further worsening, and eliminates safe hidden trouble in time.
6. filter bag material adopts antistatic material, effectively prevents the security incidents such as static initiation fire, blast;
7. device for recovering fine-particle coal can carry out on-bne repair, change the operations such as filter bag online, facilitates operation and the management of device for recovering fine-particle coal;
8. equipment inleakage is low, and device structure running resistance is little.
Accompanying drawing explanation
Fig. 1 is structural front view of the present invention.
Fig. 2 is structure side view of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated:
See Fig. 1, Fig. 2, device for recovering fine-particle coal, comprises two functional sections of coal charge pre-separation section and gas cleaning discharge section, and the separative efficiency of coal charge pre-separation section is very high, approximately containing 200g/Nm
3the flue gas of coal dust is after the separation of coal charge pre-separation section, and coal powder density can be down to 15～25g/Nm
3.Gas cleaning discharge section adopts cloth bag as filtering material, uses compressed nitrogen pulse jet as deashing means.
Coal charge pre-separation section and gas cleaning discharge section are the body structure that bottom is provided with ash silo, coal charge pre-separation intersegmental part is provided with air admission static pressure case 21, bottom is coal charge pre-separation storehouse 3, and air admission static pressure case 21 bottoms are provided with a plurality of exhaust gases passes, and exhaust gases passes is provided with pneumatic control valve 5; Gas cleaning discharge section is arranged in the both sides of coal charge pre-separation section casing and communicates with coal charge pre-separation section casing; structure comprises air flow guiding plate 20, filter bag 19, pure qi (oxygen) plenum chamber 22, fine grained recovery bin 2; air flow guiding plate 20 is arranged at a side of closing on coal charge pre-separation section; filter bag 19 is arranged in gas cleaning discharge section casing 1; bottom is provided with fine grained recovery bin 2; pure qi (oxygen) plenum chamber 22 is arranged at filter bag 19 tops and communicates with filter bag inside; filter bag 19 tops are provided with pulse spraying equipment 6, and pure qi (oxygen) plenum chamber pure qi (oxygen) exit is provided with Pneumatic off-line valve 4.
The labyrinth type structure of air flow guiding plate 20 for being formed by angle plate, the setting of air flow guiding plate can be carried out crude separation to contained coarse granule coal dust in dirt gas, can carry out water conservancy diversion to dirt gas simultaneously, the air-flow on gas cleaning discharge section filter bag surface is evenly distributed, avoid dusty gas directly to wash away filter bag surface, affect filter bag service efficiency and service life.
Gas cleaning discharge section casing 1 sidewall is equipped with explosion venting valve 7, for the timely pressure release of device interior.Coordinative composition of equipments particulate retracting device pillar and framework 8, inspection platform and guardrail 9 are arranged on equipment need to overhaul part.Each ash silo is all established accident condition nitrogen filled protection device 17, the anti-swollen materials device 10 of ash silo, ash silo temperature detecting resistance 11, grey silometer.Accident condition nitrogen filled protection device is comprised of valve group and pipeline, valve group can with alarm signal interlocked startup, in ash silo, fill nitrogen.The anti-swollen materials device of ash silo is comprised of valve group, fluidisation injection tube, and when swollen material situation appears in ash silo, the anti-swollen materials device valve group of ash silo can be passed through fluidisation injection tube, to ash silo sidewall nitrogen-blow, breaks the swollen material situation in ash silo; Each ash silo outlet is provided with screw push-pull valve 13, smoke inlet pipe 15 connects the inner air admission static pressure case 21 of device for recovering fine-particle coal, smoke outlet tube 16 connects the inner pure qi (oxygen) plenum chamber 22 of device for recovering fine-particle coal, device for recovering fine-particle coal outer surface is established insulation construction layer 18, prevents tail flue gas dewfall.
During equipment operation, coal humidity controlling system tail flue gas enters the inner air admission static pressure case 21 of device for recovering fine-particle coal by smoke inlet pipe 15, by dirt gas entrance pneumatic control valve 5, regulates after each bin air quantity, enters coal charge pre-separation storehouse 3 and carries out coal charge pre-separation.Plank frame layer is established in 3 inside, coal charge pre-separation storehouse, more than 90% coal charge is separated in coal charge pre-separation storehouse 3 from air-flow, fall into ash silo bottom, only have the fine breeze of 10% left and right with air-flow, to enter the gas cleaning discharge section casing 1 that is located at both sides, coal charge pre-separation storehouse.Gas cleaning discharge section casing 1 closes on coal charge pre-separation storehouse one side and is provided with air flow guiding plate 20, tail flue gas containing coal dust contacts with air flow guiding plate 20, bulky grain coal dust is directly fallen fine grained recovery bin 2 bottoms under effect of inertia relatively, and tail wind is through the water conservancy diversion of air flow guiding plate 20, be evenly distributed on the outer surface of gas cleaning discharge section casing 1 interior filter bag 19, containing the outer filter of coal dust flue dust process filter bag 19, coal dust become trapped in filter bag 19 outer surfaces, by adopting the regular nitrogen-blow of pulse spraying equipment 6, the duff dust that filter bag 19 is trapped blows off to fine grained recovery bin 2 bottoms.The coal dust that coal charge pre-separation storehouse 3 and fine grained recovery bin 2 are collected returns in coal preparation technology flow process by the airtight ash discharge and the conveying equipment dispatch that are attached thereto, and the pure qi (oxygen) after filter bag purifies drains into atmosphere by smoke exhaust fan.Close chronologically pure qi (oxygen) outlet Pneumatic off-line valve 4, make corresponding bin off-line ash-clearing, improve cleaning efficiency.
Coal humidity controlling system tail flue gas dew-point temperature is higher, for preventing that tail flue gas from, at device for recovering fine-particle coal internal condensation, establishing insulation construction layer 18 to outfit of equipment.
For making ash silo ash discharge, carry out smoothly, prevent that laying dust dead angle from appearring in device interior, ash silo tapering is not less than 70 °, and arc process is done in each corner of device interior, simultaneously at each ash silo swollen materials device 10 of setting up defences, regularly with the compressed nitrogen swollen fine breeze at ash silo middle part that dispels, blows off.
Device for recovering fine-particle coal is also provided with some safeguard measures: in each ash silo, establish two upper limit ash silometers 12 and two ash silo temperature detecting resistances 11, when upper limit ash silometer 12 sends alarm signal, illustrate that ash discharge equipment in ash silo bottom breaks down or swollen material appears in ash silo, should rush to repair ash discharge equipment or start the anti-swollen materials device 10 of ash silo; When ash silo temperature detecting resistance 11 records coal dust temperature higher than flue-gas temperature, illustrate that the coal dust in ash silo has started to occur oxidation reaction, system can automatically start accident condition nitrogen charging device 17 and fill nitrogen in ash silo, and pneumatic ash discharge equipment, discharges rapidly ash silo by the coal dust accumulating simultaneously.Middle part casing 1 sidewall is established explosion venting valve 7, when there is explosion accident, intrasystem pressure can be excreted to rapidly to atmosphere, prevents larger security incident.
Inspection platform and guardrail 9 are located at needs repair apparatus part, and ash silo inspection door 14 is piled up situation for checking the inner coal charge of ash silo.By closing coal charge outlet screw formula push-pull valve 13, can overhaul the airtight ash discharge equipment being connected with coal charge outlet.
Claims (1)
1. a method for recycling fine coal particles, is characterized in that, comprises the following steps:
1) device for recovering fine-particle coal comprises coal charge pre-separation section and two functional sections of gas cleaning discharge section, coal charge pre-separation section and gas cleaning discharge section are the body structure that bottom is provided with ash silo, coal charge pre-separation intersegmental part is provided with air admission static pressure case, bottom is coal charge pre-separation storehouse, air admission static pressure lower box part is provided with a plurality of exhaust gases passes, and exhaust gases passes is provided with pneumatic control valve; Gas cleaning discharge section is arranged in the both sides of coal charge pre-separation section casing and communicates with coal charge pre-separation section casing, structure comprises air flow guiding plate, filter bag, pure qi (oxygen) plenum chamber, fine grained recovery bin, air flow guiding plate is arranged at a side of closing on coal charge pre-separation section, filter bag is arranged in the casing of gas cleaning discharge section, bottom is provided with fine grained recovery bin, pure qi (oxygen) plenum chamber is arranged at filter bag top and communicates with filter bag inside, and pure qi (oxygen) plenum chamber pure qi (oxygen) exit is provided with Pneumatic off-line valve;
2) dusty gas enters air admission static pressure case by smoke inlet pipe, by being arranged at the pneumatic control valve of air admission static pressure lower box part, regulate after the air quantity of each bin of flue gas pre-separation storehouse, dusty gas enters coal charge pre-separation storehouse and carries out coal charge pre-separation, in coal charge pre-separation storehouse, most of coal charge in dusty gas is separated from the gas under the effect of deadweight, falls into bottom ash silo; Minority coal charge enters with air-flow in the casing of both sides, in gas cleaning discharge section, further carries out the separated of coal charge and gas again;
3) enter first contacting with air flow guiding plate containing the gas of a small amount of coal charge of gas cleaning discharge section, after air flow guiding plate contact-impact, bulky grain coal dust is directly fallen the fine grained recovery bin of bottom half under effect of inertia, tail wind is through the water conservancy diversion of air flow guiding plate, be evenly distributed on the outer surface of filter bag in casing, contain coal dust flue dust bag filtration after filtration, coal dust become trapped in the outer surface of filter bag, by the regular nitrogen-blow of pulse spraying equipment, the duff dust that filter bag outer surface is trapped blows off to fine grained recovery bin; Purified gas enters pure qi (oxygen) plenum chamber and drains into atmosphere through pure qi (oxygen) outlet, smoke exhaust fan;
4) coal dust that coal charge pre-separation storehouse and fine grained recovery bin are collected returns in coal preparation technology flow process by the airtight ash discharge and the conveying equipment dispatch that are attached thereto;
Each described ash silo is equipped with accident condition nitrogen filled protection device and the anti-swollen materials device of ash silo, described gas cleaning discharge section casing sidepiece is provided with explosion venting valve, and described device for recovering fine-particle coal Whole Equipment is set up defences and stopped the insulation construction layer of tail flue gas dewfall; The labyrinth type structure of described air flow guiding plate for being formed by angle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110324202.8A CN102430310B (en) | 2011-10-23 | 2011-10-23 | Method for recycling fine coal particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110324202.8A CN102430310B (en) | 2011-10-23 | 2011-10-23 | Method for recycling fine coal particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102430310A CN102430310A (en) | 2012-05-02 |
| CN102430310B true CN102430310B (en) | 2014-04-02 |
Family
ID=45978880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110324202.8A Active CN102430310B (en) | 2011-10-23 | 2011-10-23 | Method for recycling fine coal particles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102430310B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102786978B (en) * | 2012-08-06 | 2014-08-06 | 山西鑫立能源科技有限公司 | Coal as fired dehydration method for coal pyrolyzing furnace |
| CN104147864B (en) * | 2013-05-14 | 2016-08-24 | 国家电网公司 | A kind of coal collector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4227903A (en) * | 1977-08-31 | 1980-10-14 | Ab Bahco Ventilation | Filter cell apparatus |
| CN2788888Y (en) * | 2005-05-12 | 2006-06-21 | 西安建筑科技大学 | Electric-bag combined dust cleaner |
| CN101028576A (en) * | 2006-12-26 | 2007-09-05 | 云南银发环保集团股份有限公司 | Assembled electric bag dust collector |
| CN201441874U (en) * | 2009-07-31 | 2010-04-28 | 朝阳宏晟机械制造有限公司 | Energy-saving combined dust collector |
-
2011
- 2011-10-23 CN CN201110324202.8A patent/CN102430310B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4227903A (en) * | 1977-08-31 | 1980-10-14 | Ab Bahco Ventilation | Filter cell apparatus |
| CN2788888Y (en) * | 2005-05-12 | 2006-06-21 | 西安建筑科技大学 | Electric-bag combined dust cleaner |
| CN101028576A (en) * | 2006-12-26 | 2007-09-05 | 云南银发环保集团股份有限公司 | Assembled electric bag dust collector |
| CN201441874U (en) * | 2009-07-31 | 2010-04-28 | 朝阳宏晟机械制造有限公司 | Energy-saving combined dust collector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102430310A (en) | 2012-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103446830A (en) | Flue gas purifying system | |
| CN201058261Y (en) | Depth purifying bag type exhaust dust device | |
| CN107684796B (en) | Waste gas dust removal system | |
| CN206444355U (en) | A kind of unit pulsed jet cloth filter | |
| CN107008074A (en) | A kind of sack cleaner with on-line detecting system | |
| CN203400612U (en) | Flue gas purification system | |
| KR101259313B1 (en) | Cyclone and activated carbone recovery apparatus having the same | |
| CN102861485A (en) | Pulse bag type dust collector of gas tank | |
| CN102430310B (en) | Method for recycling fine coal particles | |
| CN101721175A (en) | Bag type dust collector with novel air inlet mode and airflow distribution structure | |
| CN202366595U (en) | Fine-particle coal charge recovery device | |
| CN105771450A (en) | Bag type dust collector for flue gas treatment of stamp-charging coke oven | |
| CN201240710Y (en) | Dust removing apparatus of raw material tipper | |
| CN206008347U (en) | A kind of sack cleaner for improving service life | |
| CN202893094U (en) | Plenum pulse bag type dust collector | |
| CN206980349U (en) | A kind of grey storehouse ash-discharging device | |
| CN206642497U (en) | A kind of microporous barrier chimney filter filtration dust catcher | |
| CN201543343U (en) | Bag type dust collector with novel gas intake mode and novel airflow distribution structure | |
| CN102430309A (en) | Device for recovering fine-particle coal | |
| CN204973358U (en) | Catalytic cracking regeneration flue gas pocket type dust collecting equipment | |
| CN211562341U (en) | Particulate matter purifier in dry tail-wind of PVC | |
| CN208293355U (en) | A kind of asphalt stirring environment-friendly disposal system | |
| CN201815202U (en) | Separating, dedusting and packaging system for burning of exhaust gases from polycrystalline silicon | |
| CN111450626A (en) | Smoldering and explosion resistant inerting seal system and method in filter | |
| CN207081013U (en) | One kind unloads grey storehouse soot blower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |