阅读说明：本技术 一种以延迟焦为原料生产优质针状焦的工艺及系统 (A kind of technique and system producing high-quality needle coke using delay coke as raw material ) 是由 洪艳萍 吴占德 刘亚虹 于 2019-09-27 设计创作，主要内容包括：本发明涉及一种以延迟焦为原料生产优质针状焦的工艺及系统,所述系统包括焦化塔、多个沥水仓、第一振动筛、破碎机、第二振动筛、配料仓、变量给料机、回转窑、除尘器、第三振动筛及成品仓；所述工艺是将炼焦副产品焦油沥青在焦化塔内反应后生成的延迟焦,经沥水、烘干、筛分、破碎后,按设定的粒度级配送入回转窑,在1400℃～1500℃进行煅烧,排除延迟焦中的挥发性组分和水分,煅烧成真密度为2.13g/cm3以上,热膨胀系数≤1.0×10<Sup>-6</Sup>/℃的针状焦产品。本发明解决了针状焦生产线粉尘及污水污染环境的问题,延迟焦沥水后含水量低,针状焦产品体密及强度大幅度提高,可达优级品指标。(The present invention relates to a kind of techniques and system that high-quality needle coke is produced using delay coke as raw material, and the system comprises coking tower, multiple draining storehouses, the first vibrating screen, crusher, the second vibrating screen, batch bin, variable feeder, rotary kiln, deduster, third vibrating screen and finished bins；The technique is the delay coke generated after reacting coke by-products tar asphalt in coking tower, through draining, drying, screening, it is broken after, rotary kiln is sent by the grain size distribution of setting, it is calcined at 1400 DEG C~1500 DEG C, exclude the volatile component and moisture in delay coke, being sintered into real density is 2.13g/cm3 or more, thermal expansion coefficient≤1.0 × 10 ‑6 / DEG C needle coke product.The present invention solves the problems, such as needle coke production line dust and sewage pollution environment, and water content is low after delay coke draining, and needle coke product body is close and intensity increases substantially, up to top grade product index.)

1. a kind of technique for producing high-quality needle coke as raw material using delay coke characterized by comprising by coke by-products tar The delay coke that pitch generates after reacting in coking tower, through draining, drying, screening, it is broken after, be sent by the grain size distribution of setting Rotary kiln is calcined at 1400 DEG C~1500 DEG C, excludes volatile component and moisture in delay coke, being sintered into real density is 2.13g/cm³More than, thermal expansion coefficient≤1.0x 10^-6/ DEG C needle coke product.

2. a kind of technique for producing high-quality needle coke as raw material using delay coke according to claim 1, which is characterized in that tool Body includes the following steps:

1) tar asphalt occurs cracking and condensation reaction in coking tower and delay coke is made after impurity elimination is heated；

2) delay coke is deposited using multiple draining warehousings, guarantees draining time >=48h of delay coke, the delay coke water content after draining < 8%；It is again that 200 DEG C~300 DEG C flue gases are passed through in draining storehouse after dedusting by the temperature that rotary kiln generates, is dried with fume afterheat The residual moisture of dry delay coke；Multiple draining storehouse circulation dischargings are realized continuously uninterruptedly to be fed to rotary kiln；What draining storehouse leached Sewage is collected to plash centralized processing, and delay coke powder returns to the Jiao Keng or belt conveyor of draining storehouse upstream；

3) delay coke after draining drying is through once being sieved, and the broken crusher machine of block of >=50mm guarantees into rotary kiln Delay coke granularity≤50mm；

4) warp is once sieved and broken delay coke carries out regrading, be fed using variable feeder into rotary kiln, Into rotary kiln delay coke grain size distribution by weight percentage are as follows: granularity < 10mm's accounts for 55%~65%, 10mm≤granularity ≤ 50mm's accounts for 35%~45%, and the delay coke of 2 kinds of granularities is uniformly laid with is sent into calcined by rotary kiln on a conveyor；

5) dust generated when delay coke is calcined in rotary kiln is recycled by dust storage chamber and is returned rotary kiln, the cigarette that rotary kiln generates Gas is delivered to drying of the draining storehouse for delay coke after dust-extraction unit dedusting；

6) calcined finished product needle coke is sieved, divides warehousing to deposit by granularity, packs, is put in storage.

3. a kind of system that high-quality needle coke is produced as raw material using delay coke for realizing technique as claimed in claim 1 or 2, It is characterized in that, including coking tower, multiple draining storehouses, the first vibrating screen, crusher, the second vibrating screen, batch bin, variable feed Machine, rotary kiln, deduster, third vibrating screen and finished bin；The delay coke outlet of the coking tower connects each draining the top of the warehouse Delay coke entrance, each draining orlop portion delay coke outlet is separately connected the first vibrating screen, the oversize of the first vibrating screen goes out The feeding inlet of mouth connection crusher, the screening outlet of the first vibrating screen and the discharge port of crusher are separately connected the second vibration Sieve；The oversize outlet of second vibrating screen, screening outlet are separately connected corresponding 1 batch bin；The bottom of 2 batch bins Portion sets variable feeder respectively；The delay coke entrance of the discharge port connection rotary kiln of variable feeder, the needle coke of rotary kiln go out Mouth connection third vibrating screen, the oversize outlet of third vibrating screen and screening outlet are separately connected corresponding finished bin；Revolution The dust storage chamber of kiln kiln hood connects deduster, and the exhanst gas outlet of deduster is connected at the flue gas drying device in draining orlop portion.

4. a kind of system for producing high-quality needle coke as raw material using delay coke according to claim 3, which is characterized in that institute Stating crusher is double-geared roller crusher.

5. a kind of system for producing high-quality needle coke as raw material using delay coke according to claim 3, which is characterized in that institute The bottom for stating finished bin sets finished product material outlet, and finished product material exit sets packing machine.

6. a kind of system for producing high-quality needle coke as raw material using delay coke according to claim 3, which is characterized in that institute In addition the exhanst gas outlet for stating deduster connects chimney.

Technical field

The present invention relates to coal-based needle coke production technical fields, more particularly to one kind to produce high-quality needle by raw material of delay coke The technique and system of shape coke.

Background technique

Needle coke can be divided into oil system needle coke and two kinds of coal-based needle coke.The needle coke produced by raw material of petroleum slag is oil It is needle coke, using the needle coke that coal tar asphalt and its fraction are raw material production as coal-based needle coke.Needle coke is carbon material In a fine quality being greatly developed, it is the porosu solid for having metallic luster, structure has that appearance, which is silver gray, Obvious flowing texture, hole is big and less and slightly ob-round, and particle has biggish length-width ratio, walks just like threadiness or acicular texture To that touches has lubrication to feel, and is the high-end charcoal element such as production ultra-high power graphite electrode, extraordinary carbon material, Carbon fiber and carbon fiber composites The raw material of product.China introduces external needle coke production technology from the beginning of the eighties in last century, first independent research in 2006 Needle coke production line is just debugged successfully and is put into operation, and process route is: delay coke is cut by high pressure water from coking tower and fallen into Then Jiao Keng mentions belt conveyor with grab bucket and is sent to drainage bin, then screened machine, crusher are sent to and forge preceding storehouse, via feed Disk belt feeder enters rotary kiln.Currently, the performance and production technology of domestic needle coke product are still in needing to be further increased State.

In addition, with the requirements at the higher level that national requirements for environmental protection is increasingly strict and user proposes needle coke product quality, Energy conservation and environmental protection, process, stable product quality needle coke production line can just meet the market requirement, the present invention solves production Line dust and sewage pollution environmental problem, water content is still higher after solving the problems, such as original production line delay coke draining, solution Original production line of having determined product body is close and the lower problem of intensity.Needle coke properties of product are significantly promoted, product is up to top grade product Index.

Summary of the invention

The present invention provides a kind of techniques and system that high-quality needle coke is produced using delay coke as raw material, and simple process can It realizes continuous production, makes full use of fume afterheat, environmental pollution is small, energy-saving；The bulk density and intensity of needle coke product It greatly improves, up to top grade product index.

In order to achieve the above object, the present invention is implemented with the following technical solutions:

A kind of technique that high-quality needle coke is produced as raw material using delay coke, comprising: by coke by-products tar asphalt in coke Change in tower the delay coke that generates after reaction, through draining, drying, screening, it is broken after, be sent into rotary kiln by the grain size distribution of setting, It is calcined at 1400 DEG C~1500 DEG C, excludes the volatile component and moisture in delay coke, being sintered into real density is 2.13g/ cm³More than, thermal expansion coefficient≤1.0 × 10^-6/ DEG C needle coke product.

A kind of technique producing high-quality needle coke using delay coke as raw material, specifically comprises the following steps:

1) tar asphalt occurs cracking and condensation reaction in coking tower and delay coke is made after impurity elimination is heated；

2) delay coke is deposited using multiple draining warehousings, guarantees draining time >=48h of delay coke, the delay coke after draining contains Water < 8%；It is again that 200 DEG C~300 DEG C flue gases are passed through in draining storehouse after dedusting by the temperature that rotary kiln generates, more than flue gas The residual moisture of heat drying delay coke；Multiple draining storehouse circulation dischargings are realized continuously uninterruptedly to be fed to rotary kiln；The drip of draining storehouse Sewage out is collected to plash centralized processing, and delay coke powder returns to the Jiao Keng or belt conveyor of draining storehouse upstream；

3) delay coke after draining drying is through once being sieved, and the broken crusher machine of block of >=50mm guarantees to enter back Delay coke granularity≤50mm of rotary kiln；

4) warp is once sieved and broken delay coke carries out regrading, supplied using variable feeder into rotary kiln Material, into rotary kiln delay coke grain size distribution by weight percentage are as follows: granularity < 10mm's accounts for 55%~65%, 10mm≤grain Degree≤50mm accounts for 35%~45%, and the delay coke of 2 kinds of granularities is uniformly laid with is sent into calcined by rotary kiln on a conveyor；

5) dust generated when delay coke is calcined in rotary kiln is recycled by dust storage chamber and is returned rotary kiln, and rotary kiln generates Flue gas be delivered to after dust-extraction unit dedusting draining storehouse for delay coke drying；

6) calcined finished product needle coke is sieved, divides warehousing to deposit by granularity, packs, is put in storage.

A kind of system that high-quality needle coke is produced as raw material using delay coke, including coking tower, multiple draining storehouses, the first vibration Sieve, crusher, the second vibrating screen, batch bin, variable feeder, rotary kiln, deduster, third vibrating screen and finished bin；It is described The delay coke outlet of coking tower connects the delay coke entrance of each draining the top of the warehouse, and the delay coke in each draining orlop portion exports difference The first vibrating screen, the feeding inlet of the oversize outlet connection crusher of the first vibrating screen are connected, the minus mesh of the first vibrating screen goes out The discharge port of mouth and crusher is separately connected the second vibrating screen；The oversize outlet of second vibrating screen, screening outlet connect respectively Connect corresponding 1 batch bin；The bottom of 2 batch bins sets variable feeder respectively；The discharge port of variable feeder connects The delay coke entrance of rotary kiln, rotary kiln needle coke outlet connection third vibrating screen, third vibrating screen oversize outlet and Screening outlet is separately connected corresponding finished bin；The dust storage chamber of rotary kiln end connects deduster, the exhanst gas outlet of deduster It is connected at the flue gas drying device in draining orlop portion.

The crusher is double-geared roller crusher.

The bottom of the finished bin sets finished product material outlet, and finished product material exit sets packing machine.

In addition the exhanst gas outlet of the deduster connects chimney.

Compared with prior art, the beneficial effects of the present invention are:

1) solve the problems, such as that needle coke production line dust and sewage pollution environment, dust and sewage all return to production system System, environmental pollution are small；

2) solve the problems, such as that water content is still higher (in coke hole after delay coke draining existing for acicular coke production line Delay coke water content up to 20% or more), using multiple draining storehouses, guarantee the delay coke time, while using flue gas drying, make into Delay coke moisture before kiln substantially reduces；

3) solve the problems, such as that bulk density existing for acicular coke product and intensity are lower, it is big by reasonable powder grade Amplitude improves the performance of needle coke product, and needle coke product produced is the carbon materials of top grade up to top grade product index, Application field is extremely wide, and market value is high.

Detailed description of the invention

Fig. 1 is a kind of process flow chart that high-quality needle coke is produced using delay coke as raw material of the present invention.

Fig. 2 is a kind of system structure diagram that high-quality needle coke is produced using delay coke as raw material of the present invention.

In figure: 1. coking tower, 2. 3. first vibrating screen of draining storehouse, 4. 5. second vibrating screen of crusher, 6. variable feed 12. chimney of machine 7. dust storage chamber, 8. rotary kiln, 9. third vibrating screen, 10. packing machine, 11. dust-extraction unit, 13. batch bin 14. Finished bin

Specific embodiment

Specific embodiments of the present invention will be further explained with reference to the accompanying drawing:

A kind of technique that high-quality needle coke is produced as raw material using delay coke of the present invention, comprising: by coke by-products coke The delay coke that oil asphalt generates after reacting in coking tower 1, through draining, drying, screening, it is broken after, by the grain size distribution of setting It is sent into rotary kiln 8, is calcined at 1400 DEG C~1500 DEG C, the volatile component and moisture, calcining excluded in delay coke comes true Density is 2.13g/cm³More than, thermal expansion coefficient≤1.0 × 10^-6/ DEG C needle coke product.

As shown in Figure 1, a kind of technique for producing high-quality needle coke using delay coke as raw material, specifically comprises the following steps:

1) tar asphalt occurs cracking and condensation reaction in coking tower 1 and delay coke is made after impurity elimination is heated；

2) delay coke is stored using multiple draining storehouses 2, guarantees draining time >=48h of delay coke, the delay coke after draining Water content < 8%；It is again that 200 DEG C~300 DEG C flue gases are passed through in draining storehouse 2 after dedusting by the temperature that rotary kiln 8 generates, uses cigarette The residual moisture of gas residual heat drying delay coke；The multiple circulation of draining storehouse 2 dischargings are realized to the continuous uninterrupted feed of rotary kiln 8；Drip The sewage that sump 2 leaches is collected to plash centralized processing, and delay coke powder returns to the Jiao Keng or Belt Conveying of 2 upstream of draining storehouse Machine；

3) delay coke after draining drying is through once being sieved, and the block crusher 4 of >=50mm is crushed, guarantees to enter back Delay coke granularity≤50mm of rotary kiln 8；

4) warp is once sieved and broken delay coke carries out regrading, using variable feeder into rotary kiln 8 Feed, into rotary kiln 8 delay coke grain size distribution by weight percentage are as follows: granularity < 10mm's accounts for 55%~65%, 10mm ≤ granularity≤50mm accounts for 35%~45%, and the delay coke of 2 kinds of granularities is uniformly laid with is sent into calcined by rotary kiln on a conveyor；

5) dust generated when delay coke is calcined in rotary kiln 8 is recycled by dust storage chamber 7 and is returned rotary kiln 8, rotary kiln 8 The flue gas of generation is delivered to drying of the draining storehouse 2 for delay coke after 11 dedusting of dust-extraction unit；

6) calcined finished product needle coke is sieved, divides warehousing to deposit by granularity, packs, is put in storage.

As shown in Fig. 2, a kind of system that high-quality needle coke is produced as raw material using delay coke of the present invention, including coking tower 1, multiple draining storehouses 2, the first vibrating screen 3, crusher 4, the second vibrating screen 5, batch bin 13, variable feeder 6, rotary kiln 8, remove Dirt device 11, third vibrating screen 9 and finished bin 14；The delay coke outlet of the coking tower 1 connects the delay at each 2 top of draining storehouse Burnt entrance, the delay coke outlet of each 2 bottom of draining storehouse are separately connected the first vibrating screen 3, and the oversize of the first vibrating screen 3, which exports, to be connected The feeding inlet of crusher 4 is connect, the screening outlet of the first vibrating screen 3 and the discharge port of crusher 4 are separately connected the second vibrating screen 5；The oversize outlet of second vibrating screen 5, screening outlet are separately connected corresponding 1 batch bin 13；2 batch bins 13 Bottom set variable feeder 6 respectively；The delay coke entrance of the discharge port connection rotary kiln 8 of variable feeder 6, rotary kiln 8 Needle coke outlet connection third vibrating screen 9, third vibrating screen 9 oversize outlet and screening outlet be separately connected it is corresponding at Product storehouse 14；The dust storage chamber 7 of 8 kiln hood of rotary kiln connects deduster 11, and the exhanst gas outlet of deduster 11 is connected at 2 bottom of draining storehouse Flue gas drying device.

The crusher 4 is double-geared roller crusher.

The bottom of the finished bin 14 sets finished product material outlet, and finished product material exit sets packing machine 10.

In addition the exhanst gas outlet of the deduster 11 connects chimney 12.

In the present invention, required draining storehouse quantity is calculated according to the design production capacity of needle coke and draining time, is guaranteed full The requirement of sufficient draining time and the continuity of production.The delay coke that coking tower 1 generates is stored using multiple draining storehouses 2, is guaranteed every The draining time of delay coke recycle discharging in 48h or more, and by each draining storehouse 2 in order in a draining storehouse 2, realize to time Continuous feeding in rotary kiln 8, makes full use of storage space, while save the cost, realizes the uninterrupted continuous production of system.

About 200 DEG C~300 DEG C of flue-gas temperature after 8 dedusting of rotary kiln, the present invention utilize fume afterheat, flue gas are passed through drip Requirement for drying the residual moisture of delay coke in sump 2, when meeting calcining to moisture.Heat recovery can save energy Source reduces the calcining heat consumption of rotary kiln 8.

Delay coke after draining is dry is once sieved, and granularity >=50mm block crusher 4 is crushed, with full Requirement when foot calcining to granularity.Realize the grain size distribution for closing material, by regrading again to improve needle coke product after calcining Bulk density and intensity.

The dust that rotary kiln 8 generates when calcining is recycled by dust storage chamber 7 and is back to production system, has both avoided the wave of raw material Take, also controls environmental pollution.

The sewage generated during the conveying of draining storehouse 2 and storage delay coke is collected to plash and is focused on, and prolongs Slow coke powder returns to production line, both can avoid pollution of the sewage to environment, and the delay coke powder of large percentage in sewage, ring also can be recycled It protects and No Assets wastes.

Calcined needle coke is by sizing classification (adjusting screen size according to market situation), and pack is put in storage respectively.

The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.