CN204569823U - A kind of pulverized coal pyrolysis rotary kiln - Google Patents
A kind of pulverized coal pyrolysis rotary kiln Download PDFInfo
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- CN204569823U CN204569823U CN201520191150.5U CN201520191150U CN204569823U CN 204569823 U CN204569823 U CN 204569823U CN 201520191150 U CN201520191150 U CN 201520191150U CN 204569823 U CN204569823 U CN 204569823U
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- rotary kiln
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- pulverized coal
- transfer tube
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Abstract
The utility model relates to a kind of pulverized coal pyrolysis rotary kiln.Involved pulverized coal pyrolysis rotary kiln comprises revolution body of heater, is provided with preheating section, pyrolysis section and cooling section in this revolution body of heater; Described preheating section and pyrolysis section are provided with many heat transfer tubes, and described cooling section is provided with many semicoke cooling heat transfer tubes.The heat transfer tube of pyrolysis section is interval with at least two heat smoke imports and is convenient to adjustment furnace superintendent direction temperature distribution.The use of heat transfer tube increases substantially heat interchanging area, heat transfer tube rotary kiln of the present utility model, and heat interchanging area is large, and process coal amount is large, and structure is simple, is applicable to more than the 1000000 tons extensive pyrolysis production and applications of fine coal.
Description
Technical field
The utility model relates to extensive pulverized coal pyrolysis rotary kiln device, is specifically related to a kind of pulverized coal pyrolysis rotary kiln.
Background technology
There is complex structure in existing external-heat pulverized coal pyrolysis rotary kiln, the problem yielded poorly that cost is high and heat transfer area is little and thermo-efficiency is low.
Summary of the invention
For defect or the deficiency of prior art, the utility model provides a kind of Novel external heat type pulverized coal pyrolysis rotary kiln.
Pulverized coal pyrolysis rotary kiln of the present utility model comprises revolution body of heater, is provided with preheating section, pyrolysis section and cooling section in this revolution body of heater; Described preheating section and pyrolysis section are installed with many fine coal heating heat transfer tubes, and described cooling section is installed with many semicoke cooling heat transfer tubes.
Further, the length direction of the utility model fine coal heating heat transfer tube and semicoke cooling heat transfer tube is axial arranged along turning round body of heater.
Further, the utility model many fine coal heating heat transfer tubes change and form annular tube layer with radial section in the many each comfortable rotary kiln bodies of semicoke cooling heat transfer tube, and around rotary kiln center, arrange 1-4 layer heat transfer tube.
Further, the utility model revolution body of heater meta is spaced apart vertically on the heat transfer tube of pyrolysis section is provided with at least two heat smoke imports, by heat smoke import for heat transfer tube in pyrolysis section provides heat smoke.
Further, the utility model heat smoke ingress is provided with combustion chamber, and combustion chamber can use coal gas or coal dust, coke powder as chamber fuel; Combustion chamber combustion air is from the preheated air after cooling tube heat exchange in cooling section semicoke and stove.
Further, be provided with guide spiral in the utility model revolution body of heater, described heat transfer tube is fixedly mounted on after on described guide spiral and rotates together with rotary kiln.
Further, the outer wall of the utility model fine coal heating heat transfer tube and semicoke cooling heat transfer tube is provided with anti-raising material unit, the length direction of this dust-proof device extends along the axis of radiation thermal decomposition tube, described dust-proof device is provided with mounting face and a drift angle, described mounting face is arranged on radiation thermal decomposition tube outer wall, described drift angle is relative with described mounting face, and the drift angle on described dust-proof device points to identical or parallel with the sense of rotation of described pulverized coal pyrolysis radiator tube rotary kiln.
Further, the anti-raising material unit of the utility model is welded on radiator tube outer wall by two pieces of rectangular plates and is formed, and its cross section is trilateral, and described leg-of-mutton drift angle points to identical or parallel with the sense of rotation of described pulverized coal pyrolysis rotary kiln.
Further, the gas exit on the utility model revolution body of heater is located at semicoke exit end, and the heating gas that pulverized coal pyrolysis produces discharges out of the furnace above semicoke discharge cover, carries out udst separation and receive oil with cooling after combustion.
Further, the heat smoke relief outlet of the utility model fine coal heating heat transfer tube is located at rotary kiln raw coal feed end, discharges after the heat smoke in stove in heat transfer tube and the abundant heat exchange of fine coal from rotary kiln feed end.
The beneficial effects of the utility model are:
(1) the utility model rotary kiln has increased substantially the heat transfer area of rotary kiln, the external heat type rotary furnace of same diameter, and heat transfer area improves 2-8 doubly, increases substantially production capacity;
(2) the utility model rotary kiln heat provides can be geseous fuel or solid fuel or liquid fuel, especially adopts solid fuel can significantly reduce pyrolysis and consumes fuel cost.
(3) the many combustion chambers of rotary kiln of the present utility model, achieve the problem that rotary kiln adjusts along furnace superintendent direction temperature distribution, conveniently can control thermal regulation.
(4) method that rotary kiln of the present utility model adopts air indirectly to cool reclaims semicoke waste heat, and save energy, without quenching sewage.
(5) guide spiral is combined with heat exchange tube support by rotary kiln of the present utility model, body of heater horizontal positioned, avoids kiln body inclined design, is convenient to kiln running body, simplified construction.
(6) in rotary kiln of the present utility model, on heat transfer tube, welding prevents raising material unit, for reduction coal gas dust removal load, and favourable high-temperature dust removal.
In sum, pulverized coal pyrolysis rotary kiln of the present utility model, heat interchanging area is large, and process coal amount is large, and structure is simple, is applicable to more than the 1000000 tons extensive pyrolysis production and applications of fine coal.
Accompanying drawing explanation
Fig. 1 is the structural reference schematic diagram of pulverized coal pyrolysis rotary kiln of the present utility model;
Fig. 2 is the structural reference schematic diagram preventing raising material unit of the present utility model.
Embodiment
It is little to there is heat transfer area in existing external-heat pulverized coal pyrolysis rotary kiln, the problem that thermo-efficiency is low, in order to increase heat transfer area, improve heat transfer efficiency, increase pyrolysis oven unit volume pyrolysis output, plan radiator tube technology for external-heating revolving formula pyrolysis oven, the heating efficiency of rotary kiln can be improved and significantly promote production capacity.But existing radiator tube is all fixed heating unit, how radiator tube being applied to that rotary kiln rotates together with rotary kiln is the matter of utmost importance faced; Secondly, rotary kiln length is comparatively large, and require longer radiator tube, traditional radiator tube is shorter, how to solve cigarette radiator tube length direction and ensures that longer effective wall surface temperature distribution is the Second Problem faced.3rd, radiator tube straight barrel type, general employing coal gas is as fuel, and the corresponding burner of each radiator tube, huge revolving burner is too much, and failure rate is high, inconvenience management and control.4th, fine coal moves in the radiator tube gap in revolving drum, is easily taken up formation lifting by radiator tube, causes dust in rotary kiln excessive, and coal gas dust removal by filtration load is excessive waits series of problems.
Rotary kiln of the present utility model, gas fired radiant tubes is burnt separately change combustion chambers burn into and produce after high-temperature flue gas, send in each radiator tube again, radiator tube is become simple heat transfer tube, by increase combustion chamber number meet heat transfer tube along its length temperature distribution do not allow manageable problem, obtain uniform heat distribution heating pipe wall of heat exchange pipe, heat is passed to by the material heated by radiative transfer mode by pipe wall of heat exchange pipe, certainly also comprise material contact radiator tube outer wall, by heat transfer by conduction, heat in pipe is passed to heating object material.
Embodiment:
Composition graphs 1-Fig. 2, the structure of the rotary kiln device that this embodiment provides comprises: fine coal feeding unit 11, revolution body of heater 7, support roller (5,13) and transmission mechanism 14;
Revolution body of heater 7 is provided with heating gas outlet 2, exhanst gas outlet 10 and semicoke outlet 19; In revolution body of heater 7, guide spiral 15 is installed;
Fine coal feeding unit 11 is tightly connected by entrance lock 12 and revolution body of heater 7; Exhanst gas outlet 10 is tightly connected by smoke sealing device 9 and revolution body of heater; Semicoke exports 19 places and is provided with discharge cover 1;
Walk to expect that direction is provided with preheating section, pyrolysis section and cooling section successively along fine coal in revolution body of heater 7, wherein;
Preheating section and pyrolysis section are provided with heat transfer tube 16, spaced apartly vertically on heat transfer tube 16 be provided with three groups of heat smoke imports 4, each group of heat smoke import 4 place is provided with combustion chamber (3,6,8), and each combustion chamber is tightly connected by combustion seal device 17 and revolution body of heater;
Heat transfer tube 16 is axially arranged in parallel along rotary kiln, ring radiation tube layer is formed at rotary kiln radial section, depending on rotary kiln sectional area size, around rotary kiln center, arrange 1-4 layer heat transfer tube, increase substantially heat interchanging area, in the gap of fine coal between heat transfer tube, be transferred out rotary kiln with solid of revolution flowing by after heat drying, pyrolysis, cooling.Depending on the requirement of kiln body diameter and heat-transfer surface, the heat transfer tube of the diameter of placement diameter 80-200mm.
Cooling section is provided with the heat transfer tube for semicoke cooling, and this heat transfer tube being used for semicoke cooling is provided with air intlet 18, utilizes normal temperature air to cool semicoke; The mounting means of cooling heat transferring pipe in revolution body of heater is identical with the mounting means of heating heat transfer tube in body of heater.
And every root radiation thermal decomposition tube is welded with prevents raising material unit 20, avoid the lifting in rotary course, suppress dust to occur.The cross section of anti-raising material unit is triangular structure, and wherein vertex angle direction is consistent with the radiator tube sense of rotation be arranged in revolving drum.Triangular structure is welded on radiator tube outer wall by two pieces of rectangular plates and is formed, and ensures, when the radiator tube installed in revolving drum rotates together with cylindrical shell, not easily to take up the material in cylinder, avoid lifting, avoids because lifting causes a large amount of dust.
Heat transfer tube by the adjustment of each chamber fuel supply, thus regulates the temperature distribution along rotary kiln axis.Heat transfer tube is fixed on the blade of guide spiral of rotary kiln inwall, makes guide spiral not only play guide effect, and plays the effect supporting radiator tube.
The working process of this pulverized coal pyrolysis rotary kiln:
Revolution body of heater is rotated counterclockwise, and fine coal runs from preheating section to pyrolysis section and cooling section, by with the heat exchange of preheating section radiator tube, realize drying and preheating process; Flue gas in radiator tube obtains cooling and gets rid of outside stove; Fine coal after preheating continues to run, enter pyrolysis section, high-temperature flue gas in radiator tube is used for the fine coal after pyrolysis preheating, fine coal is by after pyrolysis, become semicoke and enter cooling section, by the radiator tube heat exchange with cooling section, combustion air and coal gas obtain preheating for combustion chambers burn, and semicoke obtains cooling outside rear eliminating stove.Heating gas is derived from cooling section, enters the coal gas dust removal purification section in downstream.
Illustrate: the fine coal of room temperature, sent in the revolution body of heater of sealing by worm conveyor, enter heat transfer tube gap in rotary kiln, heat exchange is carried out with heat transfer tube, raw coal is dried when being preheating to about 300 DEG C, enter pyrolysis section, heat exchange is carried out with heat transfer tube, be heated to more than 450-500 DEG C, pulverized coal pyrolysis produces coal gas, self become semi-coke powder to stop after more than 30 minutes at pyrolysis section, be admitted to cooling section and the heat exchange of air heat-exchange pipe to be cooled to below 300 DEG C and to discharge out of the furnace, the coal gas that pyrolysis produces is discharged from the semicoke discharge cover of colling end, coal gas outflow temperature is about 300 DEG C, enter udst separation cooling workshop section.
Be less than 75 microns after semi-coke powder is levigate and be injected into the combustion air after combustion chamber and cooling section heat exchange in combustion chamber mixed firing, combustion air preheating temperature is 300 DEG C, the hot blast of burning generation about 800-900 DEG C is drawn into heat transfer tube in stove, be 500-700 DEG C in pyrolysis section heat transfer tube wall temperature, for pyrolysis fine coal, drop to about 200 DEG C with the hot blast temperature after fine coal heat exchange to discharge out of the furnace, realize and divide not obtaining indirect heat exchange.
Claims (10)
1. a pulverized coal pyrolysis rotary kiln, is characterized in that, comprises revolution body of heater, is provided with preheating section, pyrolysis section and cooling section in this revolution body of heater;
Described preheating section and pyrolysis section are installed with many fine coal heating heat transfer tubes, and described cooling section is installed with many semicoke cooling heat transfer tubes.
2. pulverized coal pyrolysis rotary kiln as claimed in claim 1, is characterized in that, described fine coal heating heat transfer tube changes with the length direction of semicoke cooling heat transfer tube axial arranged along turning round body of heater.
3. pulverized coal pyrolysis rotary kiln as claimed in claim 2, it is characterized in that, described many fine coal heating heat transfer tubes change and form annular tube layer with radial section in the many each comfortable rotary kiln bodies of semicoke cooling heat transfer tube, and around rotary kiln center, arrange 1-4 layer heat transfer tube.
4. pulverized coal pyrolysis rotary kiln as claimed in claim 1, is characterized in that, spaced apartly vertically on fine coal heating heat transfer tube is provided with at least two heat smoke imports, by heat smoke import for heat transfer tube in pyrolysis section provides heat smoke.
5. pulverized coal pyrolysis rotary kiln as claimed in claim 4, it is characterized in that, described heat smoke ingress is provided with combustion chamber.
6. pulverized coal pyrolysis rotary kiln as claimed in claim 1, it is characterized in that, be provided with guide spiral in described revolution body of heater, described heat transfer tube is fixedly mounted on described guide spiral.
7. pulverized coal pyrolysis rotary kiln as claimed in claim 1, it is characterized in that, described fine coal heating heat transfer tube change with the outer wall of semicoke cooling heat transfer tube on anti-raising material unit is installed, the length direction of this dust-proof device extends along the axis of radiation thermal decomposition tube, described dust-proof device is provided with mounting face and a drift angle, described mounting face is arranged on radiation thermal decomposition tube outer wall, described drift angle is relative with described mounting face, and the drift angle on described dust-proof device points to identical or parallel with the sense of rotation of described pulverized coal pyrolysis radiator tube rotary kiln.
8. pulverized coal pyrolysis rotary kiln as claimed in claim 7, it is characterized in that, described anti-raising material unit is welded on radiator tube outer wall by two pieces of rectangular plates and is formed, and its cross section is trilateral, and described leg-of-mutton drift angle points to identical or parallel with the sense of rotation of described pulverized coal pyrolysis rotary kiln.
9. pulverized coal pyrolysis rotary kiln as claimed in claim 1, is characterized in that, the gas exit on revolution body of heater is located at semicoke exit end.
10. pulverized coal pyrolysis rotary kiln as claimed in claim 1, it is characterized in that, the heat smoke relief outlet of fine coal heating heat transfer tube is located at rotary kiln raw coal feed end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520191150.5U CN204569823U (en) | 2015-03-31 | 2015-03-31 | A kind of pulverized coal pyrolysis rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520191150.5U CN204569823U (en) | 2015-03-31 | 2015-03-31 | A kind of pulverized coal pyrolysis rotary kiln |
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| CN204569823U true CN204569823U (en) | 2015-08-19 |
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| CN201520191150.5U Expired - Fee Related CN204569823U (en) | 2015-03-31 | 2015-03-31 | A kind of pulverized coal pyrolysis rotary kiln |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789241A (en) * | 2015-03-31 | 2015-07-22 | 长安大学 | Rotary furnace for pyrolyzing pulverized coal |
| CN106590711A (en) * | 2016-12-08 | 2017-04-26 | 陕西煤业化工集团神木天元化工有限公司 | Tar residue treatment process and equipment |
| CN108704632A (en) * | 2018-07-06 | 2018-10-26 | 西安热工研究院有限公司 | A kind of powdery desulphurizing activated coke parsing revolution furnace apparatus and analytic method |
| CN109340802A (en) * | 2018-10-17 | 2019-02-15 | 广州市挂绿环保工程有限公司 | A kind of cyclone separator |
-
2015
- 2015-03-31 CN CN201520191150.5U patent/CN204569823U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789241A (en) * | 2015-03-31 | 2015-07-22 | 长安大学 | Rotary furnace for pyrolyzing pulverized coal |
| CN106590711A (en) * | 2016-12-08 | 2017-04-26 | 陕西煤业化工集团神木天元化工有限公司 | Tar residue treatment process and equipment |
| CN108704632A (en) * | 2018-07-06 | 2018-10-26 | 西安热工研究院有限公司 | A kind of powdery desulphurizing activated coke parsing revolution furnace apparatus and analytic method |
| CN109340802A (en) * | 2018-10-17 | 2019-02-15 | 广州市挂绿环保工程有限公司 | A kind of cyclone separator |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20160331 |