CN207243817U - A kind of utilization system of low-order coal - Google Patents
A kind of utilization system of low-order coal Download PDFInfo
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- CN207243817U CN207243817U CN201721215345.4U CN201721215345U CN207243817U CN 207243817 U CN207243817 U CN 207243817U CN 201721215345 U CN201721215345 U CN 201721215345U CN 207243817 U CN207243817 U CN 207243817U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model discloses a kind of utilization system of low-order coal, which includes screening plant, air-classifier, fine coal equipment for steam treatment, kneading device, molding machine, pyrolysis installation, the first waste-heat recovery device, the second waste-heat recovery device, tar oxidation unit.The utility model additionally provides the method using system comprehensive utilization low-order coal at the same time.The system and method for the utility model solve the problems, such as that fine coal balling ratio is low, hemisphere is more, gas explosion is serious, type ball intensity is low, have both taken full advantage of pyrolysis gas latent heat, have saved the energy, while have protected former and the steady continuous service of system.
Description
Technical field
The field of low-order coal comprehensive utilization is the utility model is related to, more particularly, to a kind of comprehensive utilization of low-order coal
System.
Background technology
Coal is the important component of world's primary energy, and coal accounts for the first place of world energy sources.China is the biggest in the world
Coal production and country of consumption, coal production account for the 37% of world's coal total output, coal is in China's primary energy structure
Ratio is about 70%.Coal resources in China A wide selection of colours and designs, wherein low order coal reserves are maximum.Most domestic bulk low-order coal passes through
Pyrolysis is made semicoke and is widely used in mineral hot furnace, ferroalloy, yellow phosphorus, calcium carbide smelting and coal gas and various kiln burnings, still
Substantial amounts of powdery low-order coal can not be successfully and be pyrolyzed since gas permeability is bad.Meanwhile from the point of view of coal production, with coal
The scale of exploitation and the raising of mechanization degree, the yield of lump coal is more and more lower, and price rises steadily, and is largely fine coal
It is effectively utilized, causes the wasting of resources.In addition, during lump coal sifts out, gangue tends to be enriched with to fine coal, fine coal
The problems such as gas explosion is serious, ratio of briquetting is low, type ball intensity is small is being shown as during subsequent forming.
Utility model content
For the above-mentioned problems in the prior art, the utility model proposes a kind of utilization system of low-order coal and
Method.It is used for fine coal sorting discharge refuse by using pyrolysis high-temperature flue gas, is made using the waste heat of waste-heat recovery device recycling pyrolysis gas
Medium is excluded for gas in fine coal, solves the problems, such as that fine coal balling ratio is low, hemisphere is more, gas explosion is serious, type ball intensity is low, both filled
Divide and make use of pyrolysis gas latent heat, save the energy, while protect former and the steady continuous service of system.
To achieve these goals, the utility model discloses a kind of utilization system of low-order coal, comprising：
Screening plant, the screening plant include lump coal outlet and minus sieve coal export on low-order coal entrance, sieve；
Air-classifier, the air-classifier include smoke inlet, minus sieve coal entrance, the first offgas outlet,
Spoil exports and the outlet of powder cleaned coal, the minus sieve coal entrance are connected with minus sieve coal export；
Fine coal equipment for steam treatment, the fine coal equipment for steam treatment include powder cleaned coal entrance, the second steam inlet, second
Offgas outlet and shaping are exported with fine coal, and the powder cleaned coal entrance is connected with powder cleaned coal outlet；
Kneading device, the kneading device includes shaping fine coal entrance, binding agent entrance and mixed material outlet, described
Shaping is connected with fine coal entrance with shaping fine coal outlet；
Molding machine, the molding machine have mixed material entrance and shaping pelletizing outlet, the mixed material entrance and
The mixed material outlet is connected；
Pyrolysis installation, the pyrolysis installation has shaping pelletizing entrance, lump coal entrance on sieve, pyrolysis char exports and pyrolyzing coal
Gas outlet, exhanst gas outlet, the shaping pelletizing entrance are connected with the shaping pelletizing outlet, lump coal entrance and described on the sieve
Lump coal outlet is connected on sieve, and the exhanst gas outlet is connected with the smoke inlet.
One embodiment according to the present utility model, the system also include：
Second waste-heat recovery device, second waste-heat recovery device include pyrolysis gas entry, tar outlet, coal gas and go out
Mouth and the second steam (vapor) outlet, the pyrolysis gas entry are connected with the pyrolysis gas exit, second steam (vapor) outlet and institute
The second steam inlet is stated to be connected.
One embodiment according to the present utility model, the system also include：
First waste-heat recovery device, first waste-heat recovery device include pyrolysis char entrance, cooling semicoke outlet and
First steam (vapor) outlet, the pyrolysis char entrance are connected with pyrolysis char outlet.
One embodiment according to the present utility model, the system also include：
Tar oxidation unit, the tar oxidation unit includes tar entrance, air intake and binding agent outlet, described
Tar entrance is connected with the tar outlet, and the binding agent outlet is connected with the binding agent entrance.
The invention also discloses a kind of method using said system comprehensive utilization low-order coal, comprise the steps of：
1) low-order coal was subjected to sieve classification using screening plant, and obtained sieving lump coal and minus sieve coal；
2) minus sieve coal is subjected to pneumatic separation using air-classifier, obtains powder cleaned coal；
3) powder cleaned coal is subjected to steam treatment using fine coal equipment for steam treatment, obtains shaping fine coal；
4) shaping obtained in step 3) is placed in kneading device in proportion with fine coal and binding agent and carries out kneading processing,
Obtain mixed material；
5) mixed material is placed in molding machine and carries out forming processes, obtain shaping pelletizing；
6) shaping pelletizing is placed in pyrolysis installation and carries out pyrolysis processing, obtain pyrolysis char and pyrolysis coal gas.
One embodiment according to the present utility model, this method further include：
Lump coal, which is placed in pyrolysis installation, on the sieve that step 11) obtains step 1) carries out pyrolysis processing, obtains lump coal pyrolysis
Semicoke and lump coal pyrolysis coal gas；
Lump coal pyrolysis coal gas is placed in the second waste-heat recovery device and carries out waste heat recovery by step 12), obtains tar, coal gas
With the second steam.
One embodiment according to the present utility model, this method further include：The tar that step 13) will obtain in step 12)
Oxidation processes are carried out in tar oxidation unit, obtain the binding agent of coal powder formation in step 4).
One embodiment according to the present utility model, this method, which further includes, is placed in the lump coal pyrolysis char in step 11)
Waste heat recovery is carried out in first waste-heat recovery device, obtains cooling semicoke and the first steam.
One embodiment according to the present utility model, pyrolysis temperature is 600-900 DEG C in step 11), pyrolysis time 1-2.5
Hour；And/or
The temperature control of the second steam obtained in step 12) is 100-200 DEG C, and second steam is used to walk
It is rapid 3) in steam treatment.
The mass ratio of one embodiment according to the present utility model, the middle shaping fine coal of step 4) and binding agent is 1:
0.08-0.2, incorporation time are 6-10 minutes.
One embodiment according to the present utility model, oxidation temperature is 250-350 DEG C in step 13), oxidization time
For 1-3 it is small when, oxidant is air, air mass flow 0.5-10L/h.
The cigarette from pyrolysis installation is further included in one embodiment according to the present utility model, wherein step 6) and step 11)
High-temperature flue gas is discharged in road, and high-temperature flue gas is used as to the air flow source of air-classifier, air velocity is arranged to 4-11m/
s。
One embodiment according to the present utility model, briquetting pressure is 14-20Mpa in step 5).
By the utilization system of the above-mentioned low-order coal of the utility model and the use of method, can obtain following a variety of has
Beneficial effect：
(1) this method and system can solve the problems, such as that fine coal balling ratio is low, type ball intensity is low, gas explosion is serious, hemisphere is more,
So as to improve the utilization rate of powder, increase the economic benefit of enterprise, in addition, pyrolysis oil gas and char yeild obtained by the method
Height, quality are good；
(2) fine coal pneumatic separation is used for by the flue gas for producing pyrolysis installation, excludes spoil, the sulphur iron being enriched with fine coal
Ore deposit, reduces powder pit ash, sulphur content, improves fine coal caloric value, increases fine coal balling ratio, and then improve the quality of semicoke after pyrolysis
And reduce environmental pollution；At the same time not only using high-temperature flue gas waste heat drying fine coal, but also high-temperature flue gas processing load is reduced, so as to save
Equipment expense and saving system energy；
(3) by introducing fine coal equipment for steam treatment before molding machine, with steam come exclude to be attached to the oxygen of fine coal,
The gases such as nitrogen, carbon dioxide, so as to reduce gas explosion phenomenon, improve balling ratio；The abrasion to former is reduced at the same time and is broken
It is bad, extend its service life；
(4) the utility model uses the tar produced in pyrolytic process to eliminate outer adding additives or viscosity for binding agent
The supplying of coal, reduces requirement of the caking coal to selecting factory to build location, eliminates extra binding agent cost.
Brief description of the drawings
Fig. 1 is the structure diagram of the utilization system of the low-order coal of one embodiment according to the present utility model.
Embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to specific embodiment
And attached drawing, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only solving
The utility model is released, is not used to limit the utility model.
Fig. 1 shows the schematic diagram of the utilization system of the low-order coal of one embodiment according to the present utility model.Should
The utilization system of low-order coal includes screening plant 100, air-classifier 200, fine coal equipment for steam treatment 300, kneading
Device 400, molding machine 500, pyrolysis installation 600, the first waste-heat recovery device 700, the second waste-heat recovery device 800, tar
Oxidation unit 900.
Screening plant 100 includes lump coal outlet and minus sieve coal export on low-order coal entrance, sieve.Air-classifier 200
Including smoke inlet, minus sieve coal entrance, the first offgas outlet, spoil outlet and the outlet of powder cleaned coal, minus sieve coal entrance and sieve
The minus sieve coal export of separating device 100 is connected.Fine coal equipment for steam treatment 300 includes powder cleaned coal entrance, the second steam inlet, the
Two offgas outlets and shaping are exported with fine coal, and powder cleaned coal entrance is connected with the powder cleaned coal outlet of air-classifier 200.Kneading fills
Putting 400 includes shaping fine coal entrance, binding agent entrance and mixed material outlet, is molded and uses fine coal entrance and fine coal steam treatment
The shaping of device 300 is exported with fine coal to be connected.Molding machine 500 has mixed material entrance and the outlet of shaping pelletizing, mixed material
Entrance is connected with the mixed material outlet of kneading device 400.Pyrolysis installation 600 has shaping pelletizing entrance, lump coal entrance, heat on sieve
Semicoke outlet and pyrolysis gas exit, exhanst gas outlet are solved, is molded the shaping pelletizing outlet phase of pelletizing entrance and molding machine 500
Even, lump coal entrance is connected with lump coal outlet on the sieve of screening plant 100 on sieve, the cigarette of exhanst gas outlet and air-classifier 200
Gas entrance is connected.First waste-heat recovery device 700 includes pyrolysis char entrance, the outlet of cooling semicoke and the first steam (vapor) outlet, heat
Solution semicoke entrance is connected with the pyrolysis char outlet of pyrolysis installation 600.Second waste-heat recovery device 800 includes pyrolysis coal gas and enters
Mouth, tar outlet, gas exit and the second steam (vapor) outlet, are pyrolyzed the pyrolysis gas exit phase of gas entry and pyrolysis installation 600
Even, the second steam (vapor) outlet is connected with the second steam inlet of fine coal equipment for steam treatment 300.Tar oxidation unit 900 includes Jiao
The tar outlet of oil-in, air intake and binding agent outlet, tar entrance and the second waste-heat recovery device 800 is connected, and bonds
Agent outlet is connected with the binding agent entrance of kneading device 400.
The method that description comprehensively utilizes low-order coal using said system below.
Low-order coal was subjected to sieve classification using screening plant 100 in step 1), obtains sieving lump coal and minus sieve coal.
Screening process is carried out, to realize that the direct of block stock utilizes.
Minus sieve coal is subjected to pneumatic separation using air-classifier 200 in step 2), obtains powder cleaned coal.Gas velocity
Degree is arranged to 4-11m/s.
Powder cleaned coal is subjected to steam treatment using fine coal equipment for steam treatment 300 in step 3), obtains shaping fine coal.
Powder cleaned coal is subjected to steam treatment, nitrogen of the absorption on powder cleaned coal in said flow assorting room can be replaced and excluded to steam
The gases such as gas, carbon dioxide, since steam and fine coal have very strong compatibility, so that stress extrudes in forming unit when fine coal
When, reduce due to the gas explosion phenomenon that gas rapidly overflows and brings, and then the balling-up of pellet strength and former can be improved
Rate, increase production capacity, while the infringement to subsequent forming equipment can also be reduced, increase the service life of equipment.
In step 4) by shaping fine coal and binding agent in mass ratio be 1:0.08-0.2 be placed in kneading device 400 into
The processing of row kneading, incorporation time are 6-10 minutes, obtain mixed material.By being sufficiently stirred, binding agent and fine coal is allowed mutually to rub
Wipe, binding agent is fully infiltrated fine coal surface and is preferably contained to fine coal, so as to be conducive to follow-up coal powder formation process.
Mixed material is placed in molding machine 500 in step 5) and carries out forming processes, obtains shaping pelletizing, shaping pressure
Power is 14-20Mpa.Forming processes are carried out, to meet that fine coal enters pyrolysis installation requirement, while ensure that follow-up pyrolysis char product has
More preferable intensity.
Shaping pelletizing is placed in pyrolysis installation 600 in step 6) and carries out pyrolysis processing, obtains pyrolysis char and pyrolysis
Coal gas.Wherein pyrolysis temperature is 600-900 DEG C, when pyrolysis time 1-2.5 is small.The high-temperature flue gas of discharge can be used as pneumatic separation dress
The air flow source put.
A preferred embodiment according to the present utility model, this method are additionally included in obtain step 1) in step 11)
Lump coal, which is placed in pyrolysis installation 600, on sieve carries out pyrolysis processing, obtains lump coal pyrolysis char and lump coal pyrolysis coal gas.The height of discharge
Warm flue gas can be used as the air flow source of air-classifier.
A preferred embodiment according to the present utility model, this method are additionally included in step 12) lump coal being pyrolyzed coal gas
It is placed in the second waste-heat recovery device 800 and carries out waste heat recovery, obtains tar, coal gas and the second steam.The vapor (steam) temperature is controlled to be
100-200℃.Second steam is used for the steam treatment in step 3).
A preferred embodiment according to the present utility model, this method, which is additionally included in step 13), to be obtained in step 12)
Tar oxidation processes are carried out in tar oxidation unit 900, obtain the binding agent of coal powder formation in step 4).Oxidation
Treatment temperature is 250-350 DEG C, oxidization time 1-3h, and oxidant is air, air mass flow 0.5-10L/h, by coal tar
The oxidative condensation degree of molecule in tar can be increased by carrying out oxidation processes, and generate aromaricity bigger has hydroxyl, carboxyl
Deng the condensed-nuclei aromatics of oxy radical, so as to improve molecular weight and softening point, be conducive to subsequently carry out two in pelletizing pyrolytic process
Secondary polycondensation coking and improve pelletizing pyrolysis after intensity.
One embodiment according to the present utility model, this method, which further includes, is placed in the lump coal pyrolysis char in step 11)
Waste heat recovery is carried out in first waste-heat recovery device 700, obtains cooling semicoke and the first steam.First steam is used to generate electricity.
Describe the method using the systems and methods comprehensive utilization low-order coal in detail in embodiment below.
Embodiment one
First, raw coal is sent into screening plant 100 from coal bunker through bucket elevator, and screening plant aperture is 5mm, is obtained on sieve
Lump coal and minus sieve coal.Lump coal on the sieve of gained is delivered to revolving bed pyrolysis installation 600 through belt to be pyrolyzed, pyrolysis temperature
For 600 DEG C, pyrolysis time 2.5h, pyrolysis char and pyrolysis coal gas are obtained, while high temperature is discharged from the flue of pyrolysis installation
Flue gas.Pyrolyzing coal pneumatic transmission is entered into the second waste-heat recovery device 800, obtains tar, coal gas and the second steam.By gained tar in Jiao
Oxidation processes are carried out in oily oxidation unit 900, oxidizing temperature is 250 DEG C, and oxidization time 3h, air mass flow 0.5L/h, obtains
To the binding agent of coal powder formation.Gained minus sieve coal is delivered to air-classifier 200 through belt, is filled using self-pyrolysis is carried out
The high-temperature flue gas of 600 discharges is put as source of the gas, wherein flue gas flow rate is 4m/s, obtains powder cleaned coal, spoil and the first tail gas.By powder
Cleaned coal is sent to fine coal equipment for steam treatment 300, and the second steam obtained using the second waste-heat recovery device 800 is carried out at steam
Reason, the temperature control of the second steam is 150 DEG C, obtains shaping fine coal and the second tail gas.Shaping is pressed with fine coal and binding agent
It is 1 according to mass ratio:0.08 batch weighing is sent to kneading device 400, is mixed 10min, is obtained mixed material.By mixed material send to
Press ball device 500, pressure 14Mpa obtain shaping pelletizing, and forming unit balling ratio is 80.35%.Shaping pelletizing is sent to rotation
Rotated bed pyrolysis installation 600, pyrolysis temperature are 600 DEG C, pyrolysis time 2.5h, obtain pyrolysis char and pyrolysis coal gas.
Pyrolysis char is subjected to heat recovery by the first waste-heat recovery device 700, obtains cooling semicoke and the first steam.
Above-mentioned cooling semicoke (the cooling semicoke includes semicoke after lump coal is pyrolyzed and is molded semicoke after pelletizing is pyrolyzed) is being pressed
Ionization meter is carried out on force tester, its compression strength is 437N, and semicoke volatile matter content is 10.46%, content of ashes is
18.55%.
Embodiment two
First, raw coal is sent into screening plant 100 from coal bunker through bucket elevator, and screening plant aperture is 5mm, is obtained on sieve
Lump coal and minus sieve coal.Lump coal on the sieve of gained is delivered to revolving bed pyrolysis installation 600 through belt to be pyrolyzed, pyrolysis temperature
For 700 DEG C, pyrolysis time 1h, pyrolysis char and pyrolysis coal gas are obtained, while high temperature cigarette is discharged from the flue of pyrolysis installation
Gas.Pyrolyzing coal pneumatic transmission is entered into the second waste-heat recovery device 800, obtains tar, coal gas and the second steam.By gained tar in tar
Oxidation processes are carried out in oxidation unit 900, oxidizing temperature is 270 DEG C, and oxidization time 2h, air mass flow 5L/h, obtains powder
The binding agent of coal shaping.Gained minus sieve coal is delivered to air-classifier 200 through belt, using from pyrolysis installation
600 discharge-high-temperature flue gas as source of the gas, wherein flue gas flow rate is 6m/s, obtains powder cleaned coal, spoil and the first tail gas.By powder
Cleaned coal is sent to fine coal equipment for steam treatment 300, and the second steam obtained using the second waste-heat recovery device 800 is carried out at steam
Reason, obtains shaping fine coal and the second tail gas.According to mass ratio it is 1 by shaping fine coal and binding agent:0.1 batch weighing send to
Kneading device 400, mixes 6min, obtains mixed material.Mixed material is sent to press ball device 500, pressure 18Mpa, obtains
Pelletizing is molded, forming unit balling ratio is 85.65%.Shaping pelletizing is sent to revolving bed pyrolysis installation 600, pyrolysis temperature and is
700 DEG C, pyrolysis time 1h, obtain pyrolysis char and pyrolysis coal gas.
Pyrolysis char is subjected to heat recovery by the first waste-heat recovery device 700, obtains cooling semicoke and the first steam.
Above-mentioned cooling semicoke (the cooling semicoke includes semicoke after lump coal is pyrolyzed and is molded semicoke after pelletizing is pyrolyzed) is being pressed
Ionization meter is carried out on force tester, its compression strength is 519N, and semicoke volatile matter content is 7.46%, content of ashes is
16.49%.
Embodiment three
First, raw coal is sent into screening plant 100 from coal bunker through bucket elevator, and screening plant aperture is 5mm, is obtained on sieve
Lump coal and minus sieve coal.Lump coal on the sieve of gained is delivered to revolving bed pyrolysis installation 600 through belt to be pyrolyzed, pyrolysis temperature
For 900 DEG C, pyrolysis time 1.5h, pyrolysis char and pyrolysis coal gas are obtained, while high temperature is discharged from the flue of pyrolysis installation
Flue gas.Pyrolyzing coal pneumatic transmission is entered into the second waste-heat recovery device 800, obtains tar, coal gas and the second steam.By gained tar in Jiao
Oxidation processes are carried out in oily oxidation unit 900, oxidizing temperature is 350 DEG C, and oxidization time 1h, air mass flow 10L/h, obtains
The binding agent of coal powder formation.Gained minus sieve coal is delivered to air-classifier 200 through belt, using from pyrolysis installation
600 discharge-high-temperature flue gas as source of the gas, wherein flue gas flow rate is 11m/s, obtains powder cleaned coal, spoil and the first tail gas.By powder
Cleaned coal is sent to fine coal equipment for steam treatment 300, and the second steam obtained using the second waste-heat recovery device 800 is carried out at steam
Reason, the temperature control of the second steam is 200 DEG C, obtains shaping fine coal and the second tail gas.Shaping is pressed with fine coal and binding agent
It is 1 according to mass ratio:0.2 batch weighing is sent to kneading device 400, is mixed 8min, is obtained mixed material.Mixed material is sent to pressure
Ball device 500, pressure 20Mpa obtain shaping pelletizing, and forming unit balling ratio is 83.46%.Shaping pelletizing is sent to rotation
Bed pyrolysis installation 600, pyrolysis temperature are 900 DEG C, pyrolysis time 1.5h, obtain pyrolysis char and pyrolysis coal gas.
Pyrolysis char is subjected to heat recovery by the first waste-heat recovery device 700, obtains cooling semicoke and the first steam.
Above-mentioned cooling semicoke (the cooling semicoke includes semicoke after lump coal is pyrolyzed and is molded semicoke after pelletizing is pyrolyzed) is being pressed
Ionization meter is carried out on force tester, its compression strength is 598N, and semicoke volatile matter content is 5.11%, content of ashes is
14.78%.
Comparative example
First, raw coal is sent into screening plant from coal bunker through bucket elevator, and screening plant aperture is 5mm, obtains sieving block
Coal and minus sieve coal.The upper lump coal of gained sieve is delivered to revolving bed pyrolysis installation through belt to be pyrolyzed, pyrolysis temperature 700
DEG C, pyrolysis time 1h, obtains pyrolysis char and pyrolysis coal gas.Pyrolysis char is carried out heat by waste-heat recovery device to return
Receive, obtain cooling semicoke and steam.Pyrolyzing coal pneumatic transmission is entered into cooling device, obtains burnt oil and gas.Gained minus sieve material is sent
To press ball device, pressure 18Mpa obtains shaping pelletizing, and forming unit balling ratio is 55.29%.Shaping pelletizing is sent to rotation
Rotated bed pyrolysis installation, pyrolysis temperature are 700 DEG C, pyrolysis time 1h, obtain pyrolysis char and pyrolysis coal gas.
Above-mentioned cooling semicoke (the cooling semicoke includes semicoke after lump coal is pyrolyzed and is molded semicoke after pelletizing is pyrolyzed) is being pressed
Ionization meter is carried out on force tester, its compression strength is 334N, and cooling semicoke volatile matter content is 7.96%, content of ashes is
36.75%.
It follows that the utilization system and method for the low-order coal of the utility model significantly reduce subsequently be pyrolyzed it is later half
The ash content of burnt product, the intensity that ensure that semicoke after pyrolysis.The system can solve that coal powder formation rate is low, gas explosion is serious, type ball
The problem of intensity is low, so as to improve oil gas in follow-up pyrolytic process, the quality of semicoke and yield.And by that will be pyrolyzed
The heat recovery produced in journey, can significantly lower energy consumption.Fine coal, lump coal are separately handled at the same time, improve the profit of raw material
With rate, more preferable economic benefit is obtained for enterprise.
Embodiment described above only expresses the embodiment of the utility model, its description is more specific and detailed, but simultaneously
Therefore the limitation to the utility model patent scope cannot be interpreted as.It should be pointed out that the ordinary skill for this area
For personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this
The protection domain of utility model.
Claims (5)
1. a kind of utilization system of low-order coal, it is characterised in that include：
Screening plant, the screening plant include lump coal outlet and minus sieve coal export on low-order coal entrance, sieve；
Air-classifier, the air-classifier include smoke inlet, minus sieve coal entrance, the first offgas outlet, spoil
Outlet and the outlet of powder cleaned coal, the minus sieve coal entrance are connected with minus sieve coal export；
Fine coal equipment for steam treatment, the fine coal equipment for steam treatment include powder cleaned coal entrance, the second steam inlet, the second tail gas
Outlet and shaping are exported with fine coal, and the powder cleaned coal entrance is connected with powder cleaned coal outlet；
Kneading device, the kneading device include shaping fine coal entrance, binding agent entrance and mixed material outlet, the shaping
It is connected with fine coal entrance with shaping fine coal outlet；
Molding machine, the molding machine have mixed material entrance and the outlet of shaping pelletizing, the mixed material entrance and described
Mixed material outlet is connected；
Pyrolysis installation, the pyrolysis installation have the upper lump coal entrance of shaping pelletizing entrance, sieve, pyrolysis char to export and be pyrolyzed coal gas to go out
Mouth, exhanst gas outlet, the shaping pelletizing entrance is connected with the shaping pelletizing outlet, on the sieve on lump coal entrance and the sieve
Lump coal outlet is connected, and the exhanst gas outlet is connected with the smoke inlet.
2. the utilization system of low-order coal according to claim 1, it is characterised in that the system also includes：
Second waste-heat recovery device, second waste-heat recovery device include pyrolysis gas entry, tar outlet, gas exit and
Second steam (vapor) outlet, the pyrolysis gas entry are connected with the pyrolysis gas exit, second steam (vapor) outlet and described the
Two steam inlets are connected.
3. the utilization system of low-order coal according to claim 1, it is characterised in that the system also includes：
First waste-heat recovery device, first waste-heat recovery device include pyrolysis char entrance, cooling semicoke outlet and first
Steam (vapor) outlet, the pyrolysis char entrance are connected with pyrolysis char outlet.
4. the utilization system of low-order coal according to claim 3, it is characterised in that the system also includes：
Tar oxidation unit, the tar oxidation unit include tar entrance, air intake and binding agent outlet, the tar
Entrance is connected with the tar outlet, and the binding agent outlet is connected with the binding agent entrance.
5. the utilization system of low-order coal according to claim 1, it is characterised in that the pyrolysis installation is revolving bed
Pyrolysis installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721215345.4U CN207243817U (en) | 2017-09-21 | 2017-09-21 | A kind of utilization system of low-order coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721215345.4U CN207243817U (en) | 2017-09-21 | 2017-09-21 | A kind of utilization system of low-order coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207243817U true CN207243817U (en) | 2018-04-17 |
Family
ID=61886344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721215345.4U Expired - Fee Related CN207243817U (en) | 2017-09-21 | 2017-09-21 | A kind of utilization system of low-order coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207243817U (en) |
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2017
- 2017-09-21 CN CN201721215345.4U patent/CN207243817U/en not_active Expired - Fee Related
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