CN107600901A - A kind of lignite high temperature pyrolysis semicoke conveying equipment special, carrying method and application - Google Patents
A kind of lignite high temperature pyrolysis semicoke conveying equipment special, carrying method and application Download PDFInfo
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- CN107600901A CN107600901A CN201710829184.6A CN201710829184A CN107600901A CN 107600901 A CN107600901 A CN 107600901A CN 201710829184 A CN201710829184 A CN 201710829184A CN 107600901 A CN107600901 A CN 107600901A
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Abstract
A kind of lignite high temperature pyrolysis semicoke conveying equipment special, carrying method and application, mainly including embedded scraper transporter, by box sealing formula afterbody, interlude, air-tightness head, supporting leg and chain.A kind of lignite high temperature pyrolysis semicoke conveying equipment special, carrying method and application provided by the invention, by doing static seal, dynamic sealing processing on traditional embedded scraper transporter, equipment is improved in itself in addition, the problem of to overcome elevated temperature strength deficiency, so as to meet the conveying of lignite high temperature pyrolysis semicoke product.
Description
Technical field
The present invention relates to lignite application field, especially a kind of lignite high temperature pyrolysis semicoke conveying equipment special, conveying side
Method and application.
Background technology
Product high-temperature semi-coke after lignite high temperature pyrolysis generates electricity applied to Fluidized Bed Boiler, and the technique belongs at home at present
First Application, during high-temperature semi-coke contain a small amount of coal tar, coal gas and CO gas, temperature is up to 900 DEG C, with air
Contact is fired.In bulk material conveying equipment industry currently without the conveying equipment application precedent for conveying such high temperature, high sealing requires.
Semicoke is also known as semi-coke, coke powder, and structure is bulk, and for granularity typically in more than 3mm, color is in light/dark balance.Semicoke has
Fixed carbon is high, and ratio resistance is high, and chemism is high, and low containing ash, aluminium is low, and sulphur is low, the low characteristic of phosphorus.Metallurgical coke, smokeless can be replaced
Lump coal and charcoal and be widely used in the life of the products such as calcium carbide, metallic silicon, ferroalloy, ferrosilicon, ferrochrome, silicomanganese, carborundum, chemical fertilizer
In production.
Because the Supply situation of national high-quality coal resource is more and more severeer, the reserves of fat coal are fewer and fewer.Lignite is
A kind of coal resources between peat and pitch coal, its product rank is relatively low, so seldom directly burning.So lignite heat
Solution is just into a kind of mode of economic, environmental protection processing lignite.
Lignite pyrolysis is divided into three phases
Brown coal drying deaeration stage（Normal temperature~about 300 DEG C）
Containing moisture point by thermal evaporation in lignite, lignite obtains drying, while has gas abjection of the absorption in coal hole.About exist
More than 200 DEG C occur decarboxylation reaction, have substantial amounts of CO2 in the gas of precipitation.The stage can complete brown coal drying and part is de-
Oxygen.Some brown coal drying processes are burst apart because dehydration causes, and coal particle distribution little particle increases, or even produces more trickle coal
Dust.
First thermal decomposition stage（About 300 DEG C~about 600 DEG C）
The stage is active catabolic phase, with the depolymerization of lignite macromolecular and is decomposed into key reaction, generates and escapes and largely waves
Stimulating food matter.Tar generates at this stage；Combustible component in coal gas（CH4, H2, CO, C2~C3）Raise and increase with temperature；Gu
Body particle is possible to further diminish.The stage is to obtain tar and semicoke that caloric value significantly improves is major product.
Second thermal decomposition stage（About 600 DEG C~about 900 DEG C）
With polymerisation and the small molecule side chain of aromatic hydrocarbon edge joint（-CH3）Or hydrogen comes off for key reaction.Gas yield
It is improved largely, the increase of H2 contents is very fast in coal gas, and other components volume content is relatively low.Under the conditions of quick pyrolysis,
Due to the secondary pyrolysis of tar vapor at high temperature, oily yield is improved and reduced with temperature.Semicoke volatile matter carries with temperature
It is high gradually to reduce, solids carbon content increase.The stage fixes carbon content to obtain the coal gas of high yield and low volatile, height
Based on semicoke.
In order to solve for the second thermal decomposition stage（About 600 DEG C~about 900 DEG C）The conveying of product semicoke, warmed because lignite is high
Material caused by solution is high temperature, inflammable, explosive gas, solid mixture.The security that conveying equipment conveys to guarantee, then it is first
High temperature resistant, including housing, feeding groove, connector, sealing gasket, fluid sealant, scraper plate are first sought to conveying equipment requirement
Chain, bearing block, bearing etc.；Next is to ensure that the sealing property of conveying equipment, including static seal and dynamic sealing, static seal
The place being connected with including the junction between housing and housing and its needs, dynamic sealing includes head, tailing axle stretches out housing
Partial sealing.Existing equipment can not meet this requirement.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of lignite high temperature pyrolysis semicoke conveying equipment special, conveying side
Method and application, caused high temperature, inflammable, explosive gas, solid mixture carry out stablizing conveying after being decomposed to lignite, and ensure
The overall performance of equipment is good.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of lignite high temperature pyrolysis semicoke conveying equipment special, including box sealing formula afterbody, interlude, air-tightness head, branch
Leg and chain；
Air-tightness head includes scrapper conveyor housing, head axle, is sealed between scrapper conveyor housing and stuffing-box by refractory seals glue
Connection；Both sides are provided with celion packing ring, middle injection pureed soft packing, high temperature resistant in cavity between head axle and stuffing-box
Butter, stuffing-box side are sealed by binder lid；
The housing junction of the conveying equipment is attached using integrally formed flange, and resistance to height is used between flange and flange
Warm graphite grazing pad and refractory seals glue are sealed.
With material directly contact part into U shape in the interlude, and the structure that is formed in one.
The Housing Base and side plate of the conveying equipment select exotic material, and cover plate uses insulation material.
The bottom plate and side plate of the housing of the conveying equipment select 310S, and cover plate selects 15CrMo.
One high temperature resistant expansion joint is set between the described conveying equipment and pyrolysis oven, and the supporting leg at corresponding interlude is adopted
With briquette structure, the supporting leg on air-tightness head uses independent external bearing seat supports.
The chain material selection is JHY-6.
The conveying equipment is provided with safety monitoring assembly, and safety monitoring assembly includes closed type observation lid, gas componant is taken out
Examine mouth, temperature, pressure detection mouth, accident nitrogen inlet, broken chain detecting device.
The broken chain detecting device includes being arranged on magnetic floral disc on tailing axle, fixed magnetic on the outside of corresponding seal case
Sensor, magnetic sensor make feedback to the rotating speed of magnetic floral disc.
Cavity and connection by metal hose between the head axle and stuffing-box, metal hose are connected with extraneous feeding device.
A kind of lignite high temperature pyrolysis semicoke dedicated transport method, box sealing formula afterbody in traditional embedded scraper transporter,
Static seal and dynamic sealing are realized respectively at the junction and rotation on interlude and air-tightness head, to ensure overall air-tightness,
Prevent gas from leaking；The delivery chute that material conveys is designed to concave, and compacting is integrally formed, and has both been reduced and has been produced at high temperature
Raw weld strength problem, while also make chain away from high-temperature material；By setting safety monitoring assembly, observation inspection can be periodically carried out
Survey and intelligence test chain rupture situation, guarantee are safely and effectively run.
The adpting flange that static seal is made by the way of integral blanking, integral manufacturing, die punching, in housing and housing
Between the local adpting flange and adpting flange that is connected with of junction and its needs between it is close using high temperature resistant graphite
Packing and refractory seals glue are sealed, and the dynamic sealing that housing parts are stretched out for air-tightness head is connected in axle with housing
Periodically injection pureed soft packing and high temperature resistant butter, filler both sides are stopped with celion packing ring in the cavity at position；
Then used for box sealing formula afterbody and seal case is set outside scrapper conveyor tail bearing seat, and inert gas is opened on casing
Inflation inlet.Equipment is filled with inert gas when running inside casing.
A kind of lignite high temperature pyrolysis semicoke conveying equipment special reaches 900 degrees Celsius of lignite high temperature pyrolysis product in temperature
Application in semicoke conveying.
The present invention a kind of lignite high temperature pyrolysis semicoke conveying equipment special, carrying method and application, there is following technology effect
Fruit：
1）, folded plate designed using concave by the way that the feeding groove by high-temperature material will be deposited shaped, avoid high temperature from influenceing weld seam strong
Degree, avoiding chain from directly being contacted with material reduces intensity, while it also avoid flight chain and directly contacted with high-temperature material.
2）, it is quiet by using high temperature resistant graphite grazing pad and refractory seals glue to carry out between the flange of housing junction
Sealing, promotion rotation can be lubricated with celion packing ring, pureed soft packing and high temperature resistant butter at the dynamic sealing of termination
Turn, avoid wearing, while can also ensure good sealing.
3）, by setting various security checks, periodically manually observed or detected, in addition box sealing formula afterbody set
Broken chain detecting device, once breaking, controller can control alarm equipment alarm, avoid equipment idling loss energy.
4）, by being improved to traditional embedded scraper transporter, make the equipment scope of application wider.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the schematic diagram of the present invention.
Fig. 2 is the sectional view of interlude in the present invention.
Fig. 3 is the schematic diagram on air-tightness head in the present invention.
Fig. 4 is the schematic diagram at floral disc in the present invention.
In figure：Box sealing formula afterbody 1, interlude 2, air-tightness head 3, supporting leg 4, scrapper conveyor housing 5, head axle 6, stuffing-box 7,
Celion packing ring 8, pureed soft packing 9, high temperature resistant butter 10, binder lid 11, floral disc 12, magnetic sensor 13, metal
Flexible pipe 14, drive device 15, independent external bearing seat supports 16, charge door 17, refractory seals glue 18, expansion joint 19 are defeated
Hopper 20.
Embodiment
As shown in figure 1, a kind of lignite high temperature pyrolysis semicoke conveying equipment special, including box sealing formula afterbody 1, interlude
2nd, air-tightness head 3, supporting leg 4, flight chain, drive device 15, independent external bearing seat supports 16, charge door 17.
Because the temperature of lignite high temperature pyrolysis is up to about 600 DEG C~about 900 DEG C, the semicoke temperature after pyrolysis is generally 800
DEG C, 850 DEG C of highest, the feeding groove of embedded scraper transporter contacts with high-temperature material for a long time, then just needs to consider selected material
High-temperature expansion coefficient and high temperature mechanical strength and unlike material between weld after high temperature weld strength.
As shown in Fig. 1~2, to solve the problems, such as embedded scraper transporter high-temperature expansion, first between pyrolysis oven and conveyer
One high temperature resistant expansion joint 19, the elastic compensating being achieved at the charging under hot conditions are set.In addition by air-tightness head 3
The supporting leg 4 at place, supporting leg 4 here is that independent external bearing seat supports 16 are fixed, and the supporting leg 4 of interlude 2 uses
Briquette structure.By the way that the independent external bearing seat supports 16 on head are fixed, so that it is determined that expansion zero point, allows complete machine rearwardly
Linear expansion, the expansion for housing perpendicular to body axis only need to be reasonable in design by the gap of briquetting and the housing of interlude 2
.
To solve the problems, such as embedded scraper transporter high temperature mechanical strength, the bottom plate and side plate of the housing of the conveying equipment are selected
310S, and cover plate selects 15CrMo.Because 310S has superior high-temperature behavior, can be run for a long time under conditions of 1150 DEG C,
Also a period of time can be run under conditions of 1200 DEG C, selects 310S materials enough for this patent.Due to for a long time with
The part of high-temperature semi-coke contact is feeding groove, the heat transfer and heat loss of steel and air is considered further that, so only conveyer bottom
Plate and side plate select 310S and cover plate selects 15CrMo just.
As shown in Fig. 2 in order to solve the problems, such as the welding strength of welding seam under unlike material high temperature, by with material directly contact
Feeding groove 20 is designed to concave, and material is run in groove, and the concave feeding groove is molded using integrated punching, is not welded
Seam avoids influence of the high temperature to weld seam from causing to reveal.Other welding positions of feeding groove will using special stainless steel high temperature resistant welding rod
The diagonally interior external welding of two blocks of steel plates.
Because chain is chronically at high temperature applicationss, in order that chain possesses good mechanicalness at high temperature
Can, chain material selection is JHY-6#, and JHY-6# materials are using advanced ghost without mould, negative pressure magnetic rotation, vibrations teeming
Technique is made.It is qualified that the material by Shandong gold ocean heavy industry Science and Technology Ltd. delivers to the detection of national ferrous materials test center.
The product tissue produced is very fine and close, in addition, the technique can be with crystal grain thinning, reduction casting is loose, reduces gas hole defect,
Improve casting compactness, fully optimized and the mechanical property for strengthening casting；Using the workpiece of this technique productions than common process
Weigh 5%.Its material characteristics is：Intensity under 870 DEG C of high temperature can reach 490MPa, and anti-wear performance is superior, and toughness is good under high temperature
It is good.
Further, since above-mentioned concave conveying slot structure, thus is avoided that chain directly contacts with material, such energy
Greatly improve the service life of chain.
Contain coal gas in the material generated by lignite high temperature pyrolysis, it is therefore desirable to form good sealing（Sealing is again
It is divided into static seal and dynamic sealing）.
For static seal, can be connected with the junction between embedded scraper transporter housing and housing and its needs
Place, for the adpting flange at this, use integral blanking, integral manufacturing, die punching mode with ensure its flatness and
Precision.Loaded onto between flange and flange and coat refractory seals glue again after high temperature resistant graphite grazing pad and make its sealing reliability more
Height, sealing are tighter.
And the sealing for the head, tail tail shaft that dynamic sealing refers to.
As shown in Fig. 3, air-tightness head 3 includes scrapper conveyor housing 5, head axle 6, wherein scrapper conveyor housing 5 and stuffing-box 7
Between junction be equipped with refractory seals glue 18, can ensure the inside gas do not escape out, the gas of outside does not enter.Head axle
Both ends are provided with celion packing ring 8, celion packing ring 8, both ends graphitic carbon fibre in cavity between 6 and stuffing-box 7
Pureed soft packing 9, high temperature resistant butter 10, the opposite side of stuffing-box 7 and the bolt connection of binder lid 11 are filled between dimension packing ring 8,
Middle sealing cavity is sealed.Celion packing ring 8 has good high temperature resistant, anti-wear performance, can block pureed
Soft packing 9, it is allowed to that enclosure interior can not be entered；And pureed soft packing is divided into three layers when axle rotates, along Axial and radial from inside to outside
It is respectively：Rotate layer, frictional layer, quiescent layer.Because the rotating speed of scrapper conveyor is not high, so the consumption of frictional layer is little.Pass through
A metal hose is connected outside sealing cavity, if periodically with special implantation tool by metal hose 14 toward in stuffing-box
Face adds pureed soft packing 9 and high temperature resistant butter 10.
And in box sealing formula afterbody 1, seal case is mainly set outside scrapper conveyor tail bearing seat, and is opened on casing
Inert gas plenum mouth.Equipment is filled with inert gas when running inside casing, so as to completely cut off internal body and extraneous gas.
So ensure the sealing of the sealed afterbody 1 of casing.
Further, since conveying thing is high temperature, inflammable, explosive gas, solid mixture, in order to ensure the security of conveying.
The relevant position of the equipment is provided with corresponding closed type observation lid, gas componant sampling observation mouth, temperature, pressure detection mouth, accident nitrogen
Gas entrance.
As shown in Fig. 4, convenient artificial observation of periodically testing.It is fixed on the tailing axle of box sealing formula afterbody 1 in addition
One magnetic floral disc 12, then fixes a magnetic sensor 13 on the outside of seal case, and flower can be measured by magnetic sensor
The rotating speed of disk is so as to judge whether chain is broken, if chain breakage, tailing axle rotating speed is 0, passes through the feedback-type of magnetic sensor
Master Control Room number is passed to by equipment downtime, ensures the validity of equipment operation.
A kind of lignite high temperature pyrolysis semicoke dedicated transport method, box sealing formula afterbody in traditional embedded scraper transporter,
Static seal and dynamic sealing are realized respectively at the junction and rotation on interlude and air-tightness head, to ensure overall air-tightness,
Prevent gas from leaking；The delivery chute that material conveys is designed to concave, and compacting is integrally formed, and has both been reduced and has been produced at high temperature
Raw weld strength problem, while also make chain away from high-temperature material；By setting safety monitoring assembly, observation inspection can be periodically carried out
Survey and intelligence test chain rupture situation, guarantee are safely and effectively run.
The adpting flange that static seal is made by the way of integral blanking, integral manufacturing, die punching, in housing and housing
Between the local adpting flange and adpting flange that is connected with of junction and its needs between it is close using high temperature resistant graphite
Packing and refractory seals glue are sealed, and the dynamic sealing for tail tail shaft is in axle and housing coupling part position
Periodically injection pureed soft packing and high temperature resistant butter, filler both sides are stopped with celion packing ring in cavity.
A kind of lignite high temperature pyrolysis semicoke conveying equipment special reaches 900 degrees Celsius of lignite high temperature pyrolysis product in temperature
Application in semicoke conveying.
Claims (10)
- A kind of 1. lignite high temperature pyrolysis semicoke conveying equipment special, it is characterised in that：Including box sealing formula afterbody（1）, it is middle Section（2）, air-tightness head（3）, supporting leg（4）And chain；Air-tightness head（3）Including scrapper conveyor housing（5）, head axle（6）, scrapper conveyor housing（5）With stuffing-box（7）Between by resistance to High-temperature seal adhesive is tightly connected；Head axle（6）With stuffing-box（7）Between in cavity both sides be provided with celion packing ring（8）, in Between inject pureed soft packing（9）, high temperature resistant butter（10）, stuffing-box（7）Side passes through binder lid（11）Sealing；The housing junction of the conveying equipment is attached using integrally formed flange, and resistance to height is used between flange and flange Warm graphite grazing pad and refractory seals glue are sealed；The interlude（4）Interior and material directly contact part is into U shape, and the structure that is formed in one；The Housing Base and side plate of the conveying equipment select exotic material, and cover plate uses high temperature resistant insulation material.
- A kind of 2. lignite high temperature pyrolysis semicoke conveying equipment special according to claim 1, it is characterised in that：The conveying is set The bottom plate and side plate of standby housing select 310S, and cover plate selects 15CrMo.
- A kind of 3. lignite high temperature pyrolysis semicoke conveying equipment special according to claim 1, it is characterised in that：It is described that this is defeated Send one high temperature resistant expansion joint of setting, corresponding interlude between equipment and pyrolysis oven（2）The supporting leg at place（4）Using briquetting knot Structure, air-tightness head（3）Supporting leg（4）Using independent external bearing seat supports（16）.
- A kind of 4. lignite high temperature pyrolysis semicoke conveying equipment special according to claim 1, it is characterised in that：The conveying That chain material is selected is JHY-6#.
- A kind of 5. lignite high temperature pyrolysis semicoke conveying equipment special according to claim 1, it is characterised in that：The conveying is set Standby to be provided with safety monitoring assembly, safety monitoring assembly includes closed type observation lid, gas componant sampling observation mouth, temperature, pressure detection Mouth, accident nitrogen inlet, broken chain detecting device.
- A kind of 6. lignite high temperature pyrolysis semicoke conveying equipment special according to claim 1, it is characterised in that：The chain rupture Detection means includes the magnetic floral disc being arranged on tailing axle（12）, fixed magnetic sensor on the outside of corresponding seal case（13）, Magnetic sensor（13）To magnetic floral disc（12）Rotating speed make feedback.
- A kind of 7. lignite high temperature pyrolysis semicoke conveying equipment special according to claim 1, it is characterised in that：The head axle （6）With stuffing-box（7）Between cavity and metal hose（14）Connection, metal hose（14）It is connected with extraneous feeding device.
- What 8. a kind of lignite high temperature pyrolysis semicoke conveying equipment special according to claim 1-7 any one was conveyed Method, it is characterised in that：In the box sealing formula afterbody of traditional embedded scraper transporter（1）, interlude（2）And air-tightness head （3）Junction and rotation at realize static seal and dynamic sealing respectively, to ensure overall air-tightness, prevent gas from leaking；Will The delivery chute of material conveying is designed to concave, and suppresses bending and be integrally formed, and has both reduced producing weld strength at high temperature Problem, while also make chain away from high-temperature material；By setting safety monitoring assembly, observation detection and intelligent testing can be periodically carried out Chain rupture situation is tried, ensures safely and effectively operation.
- A kind of 9. lignite high temperature pyrolysis semicoke dedicated transport method according to claim 8, it is characterised in that：Static seal is adopted The adpting flange made of the mode of integral blanking, integral manufacturing, die punching, junction between housing and housing and its High temperature resistant graphite grazing pad and refractory seals are used between the local adpting flange and adpting flange for needing to be connected with Glue is sealed, and the dynamic sealing for air-tightness head stretching housing parts is regular in the cavity of axle Yu housing coupling part position Pureed soft packing and high temperature resistant butter are injected, filler both sides are stopped with celion packing ring；For box sealing formula tail Portion is then used and sets seal case outside scrapper conveyor tail bearing seat, and inert gas plenum mouth is opened on casing；Equipment is run When inert gas is filled with inside casing.
- 10. a kind of lignite high temperature pyrolysis semicoke conveying equipment special according to claim 1-7 any one, its feature exist In：Application in temperature reaches 900 degrees Celsius of lignite high temperature pyrolysis product semicoke conveying.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710829184.6A CN107600901B (en) | 2017-09-14 | 2017-09-14 | Special conveying equipment, conveying method and application for lignite pyrolysis semicoke |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710829184.6A CN107600901B (en) | 2017-09-14 | 2017-09-14 | Special conveying equipment, conveying method and application for lignite pyrolysis semicoke |
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| Publication number | Publication date |
|---|---|
| CN107600901B (en) | 2023-10-20 |
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