CN112013415A - Coal-fired hot-blast stove capable of improving combustion rate - Google Patents
Coal-fired hot-blast stove capable of improving combustion rate Download PDFInfo
- Publication number
- CN112013415A CN112013415A CN202010679842.XA CN202010679842A CN112013415A CN 112013415 A CN112013415 A CN 112013415A CN 202010679842 A CN202010679842 A CN 202010679842A CN 112013415 A CN112013415 A CN 112013415A
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- Prior art keywords
- coal
- net
- combustion rate
- spiral
- blast stove
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/08—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers
- B02C18/12—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers with drive arranged below container
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
- F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
- F24H3/088—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using solid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
- F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The invention relates to a coal-fired hot air furnace capable of improving the combustion rate, which comprises a furnace body, wherein the upper part of the furnace body is connected with a heat exchange bin arranged on one side through a smoke exhaust pipe and is used for exchanging heat for cold air in a heat exchange pipe inside the heat exchange bin, and the outer wall of the furnace body is fixedly connected with a feed hopper used for crushing coal blocks into coal particles or coal powder. According to the invention, the knapper in the feed hopper rotates and goes up and down along the spiral net of the single-circle spiral, so that the conical column at the upper half part of the knapper drives the blade to perform primary processing on the coal briquette, the coal briquette is cut into coal briquettes with smaller volume, then the coal briquettes are pressed again on the leakage net by the pressing table at the lower half part of the knapper to press coal powder or coal particles which meet the specification, thereby facilitating combustion, changing the original feed hopper of the coal-fired hot blast stove into a device for processing the coal briquette into the coal powder, avoiding loss during coal powder transportation, avoiding the problem of lower efficiency of directly burning the coal briquette, and improving the combustion rate of the hot blast stove.
Description
Technical Field
The invention relates to the technical field of hot blast stoves, in particular to a coal-fired hot blast stove capable of improving the combustion rate.
Background
The hot blast stove has various types and complete series, and is divided into two types of manual burning and mechanical burning in a coal feeding mode, coal, oil and gas furnaces in fuel type, high-temperature furnaces and medium-temperature furnaces in output air temperature mode, indirect type and direct type in conveying mode, closed type and separated type in heat exchanger arrangement mode, and a coal grinding and powder spraying machine is arranged on a large furnace. The working principle is as follows: the coal-fired coal-grinding powder-spraying machine is changed into coal powder or coal particles, the coal powder or the coal particles are sprayed into the combustion chamber, the coal powder or the coal particles are fully combusted in the combustion chamber through air, the hot air after combustion is changed into fresh cold air through the heat exchanger, and the fresh air can reach high temperature and is used for heating and drying materials and the like.
The existing part of coal-fired hot blast stoves burn coal briquettes, and because the combustion efficiency of the coal briquettes is less than that of coal dust, the efficiency of the hot blast stove directly firing the coal briquettes is lower than that of coal dust, but the coal dust is inconvenient to transport, and large transportation loss is easily generated.
Disclosure of Invention
The invention provides a coal-fired hot air furnace capable of improving the combustion rate in order to meet the requirement of directly burning coal powder by the coal-fired hot air furnace.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the utility model provides an improve coal-fired hot-blast furnace of combustion rate, includes the furnace body, the furnace body top links to each other through the heat transfer storehouse that the pipe of discharging fume set up with one side, is used for right cold air in the inside heat exchange tube in heat transfer storehouse carries out the heat transfer, the outer wall fixedly connected with of furnace body is used for becoming the feeder hopper of coal cinder breakage coal or buggy, the inside knapper that rises that rotates along the spiral net that is provided with of feeder hopper, this knapper upper portion is broken through the blade that the spiral was arranged when rotating the coal cinder, and lower part is gone up and down along the spiral net through pressing the platform and is carried out the repression on the coal cinder on leaking the net.
The feeder hopper from the top down be in proper order last storehouse, lower storehouse and with the row's of the furnace body is linked together expects the pipe, arrange that the material pipe embeds there is the fan that sprays buggy and coal cinder.
The knapper is divided into a conical column and an upper pressing platform and a lower pressing platform, the outer wall of the conical column is spirally provided with a plurality of blades, the volume of the blades is gradually reduced from the upper part to the lower part of the blade cluster, and the conical column is positioned in the circular hopper-shaped upper bin.
The lower fixed surface of toper post is connected with the guide board, this guide board along the upper surface of screw net slides, the lower surface of guide board is provided with a plurality of groups of ball, go up the storehouse with be provided with the screw net of single circle spiral down between the storehouse, just it is fixed mutually through vertical baffle between the upper and lower both ends of screw net.
The bottom area of the pressing table is the same as that of the leakage net, the leakage net is in a plate shape, and the pressing table is located in the lower bin.
The shaft center of the knapper is provided with a rotary groove, the inside of the rotary groove is rotatably provided with a rotary rod fixedly connected with a motor conveying shaft, the side wall of the rotary rod is provided with a spline, and the spline slides in a key groove on the side surface of the rotary groove.
The top in the heat transfer storehouse is provided with the purge tube that is used for discharging smog, the heat exchange tube sets up to the helical tube form, and the below is the intake pipe that is used for the cold air entering, and the top is hot air exhaust's outlet duct.
The invention has the beneficial effects that:
according to the invention, the knapper in the feed hopper rotates and goes up and down along the spiral net of the single-circle spiral, so that the conical column at the upper half part of the knapper drives the blade to perform primary processing on the coal briquette, the coal briquette is cut into coal briquettes with smaller volume, then the coal briquettes are pressed again on the leakage net by the pressing table at the lower half part of the knapper to press coal powder or coal particles which meet the specification, thereby facilitating combustion, changing the original feed hopper of the coal-fired hot blast stove into a device for processing the coal briquette into the coal powder, avoiding loss during coal powder transportation, avoiding the problem of lower efficiency of directly burning the coal briquette, and improving the combustion rate of the hot blast stove.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is an overall cross-sectional schematic view of the present invention;
FIG. 2 is a schematic view of the feed hopper of the present invention;
FIG. 3 is a schematic perspective view of the feed hopper of the present invention;
FIG. 4 is a schematic side cross-sectional view of the feed hopper of the present invention;
fig. 5 is a partially enlarged schematic view of fig. 2.
In the figure: 1. a furnace body; 2. a feed hopper; 21. loading the materials into a bin; 22. discharging the bin; 23. a discharge pipe; 24. a spiral net; 25. a crusher; 251. a tapered post; 252. pressing the table; 253. a guide plate; 2531. a ball bearing; 254. rotating the groove; 255. a keyway; 26. a blade; 27. a motor; 271. a rotating rod; 272. a spline; 28. a leakage net; 3. a smoke exhaust pipe; 4. an ash discharge pipe; 5. a heat exchange bin; 51. a purge tube; 6. a heat exchange pipe; 61. an air inlet pipe; 62. and an air outlet pipe.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be described more clearly and more completely with reference to the drawings in the following embodiments, and it is understood that the described embodiments are only a part of the present invention, rather than all of the present invention, and based on the embodiments, other embodiments obtained by those skilled in the art without inventive exercise are within the protection scope of the present invention.
As shown in fig. 1 to 5, a coal-fired hot-blast furnace for improving combustion rate, including furnace body 1, furnace body 1 top links to each other with the heat transfer storehouse 5 that one side set up through discharging fume pipe 3, be arranged in carrying out the heat transfer to the cold air in the heat exchange tube 6 of heat transfer storehouse 5 inside, the outer wall fixedly connected with of furnace body 1 is used for breaking the coal cinder into the feeder hopper 2 of coal cinder or buggy, feeder hopper 2 inside is provided with the knapper 25 that rotates ascending along the spiral net 24 of lateral wall, this knapper 25 upper portion is broken through the blade 26 that the spiral was arranged when rotating the coal cinder, lower part carries out the heavy load through pressing platform 252 to the coal cinder on leaking the net 28 when going up and down along spiral net 24.
The feed hopper 2 comprises an upper bin 21, a lower bin 22 and a discharge pipe 23 communicated with the furnace body 1 from top to bottom, and a fan for spraying pulverized coal and coal particles is arranged in the discharge pipe 23. The discharge pipe 23 of the built-in fan can inject the coal powder and coal particles which can pass through the leakage net 28 into the furnace body 1, and the coal powder and the coal particles are sufficiently combusted and heated for quick combustion and heat dissipation, so that the thermal efficiency of combustion is increased.
The crusher 25 is divided into two parts, namely a conical column 251 and a pressing platform 252, wherein a plurality of blades 26 are spirally arranged on the outer wall of the conical column 251, the volume of the blades 26 is gradually reduced from top to bottom, and the conical column 251 is positioned inside the upper bin 21 in a round bucket shape. The conical column 251 is arranged in the round hopper-shaped upper bin 21, more space is reserved for containing coal blocks, the conical column 251 drives the blade 26 with the volume gradually reduced from top to bottom to rotate, so that the coal blocks with large volume are cut continuously, are decomposed into coal blocks with small volume, and then fall into the lower part from the middle of the spiral net 24 to be further crushed.
The lower surface of the tapered column 251 is fixedly connected with a guide plate 253, the guide plate 253 slides along the upper surface of the spiral net 24, the lower surface of the guide plate 253 is provided with a plurality of groups of balls 2531, the spiral net 24 with a single-circle spiral is arranged between the upper bin 21 and the lower bin 22, and the upper end and the lower end of the spiral net 24 are fixed through vertical partition plates. The whole breaker 25 is lifted along the spiral net 24 by the arrangement of the guide plate 253, and the breaker is dropped until the highest end, when the breaker is dropped, the pressure table 252 firstly drops on the leakage net 28, so that the guide plate 253 does not drop on the spiral net 24, the guide plate 253 only contacts with the spiral net 24 in the rotating process to drive the breaker 25 to rise, repeated dropping during rotation is avoided to break the guide plate 253, the service life of the guide plate 253 is influenced, the ball 2531 rolls at the part of the spiral net 24 without holes, so that the friction between the guide plate 253 and the spiral net 24 is reduced, the guide plate 253 is prevented from being worn under ceaseless rotation, the arrangement of the spiral net 24 with a single spiral enables the guide plate 253 to directly drop along the end when the upper end of the spiral net 24 is guided, the pressure table 252 is driven to drop to crush small coal briquettes, the upper end and the lower end of the spiral net 24 are fixed by the partition plate, the guide plate 253 is prevented from freely sliding down along the spiral net 24 when no power is provided, so that the guide plate is separated from the lowest end of the spiral net 24, and the next normal use cannot be ensured.
The bottom area of the platen table 252 is the same as the area of the screen 28, the screen 28 is provided in a plate shape, and the platen table 252 is located in the lower magazine 22. The pressing table 252 presses the small coal blocks on the surface of the perforated net 28 when the coal blocks descend, one part of the coal blocks is crushed, the other part of the coal blocks is cut and extruded from holes of the perforated net 28 to be crushed, the plate-shaped perforated net 28 is used for weighing, and the coal blocks cannot be crushed due to self crushing or bending.
The crusher 25 has a rotary groove 254 opened at the axial center thereof, a rotary rod 271 fixedly connected to the transmission shaft of the motor 27 is rotatably provided in the rotary groove 254, a spline 272 is provided on a side wall of the rotary rod 271, and the spline 272 slides in a key groove 255 on a side surface of the rotary groove 254. The rotating rod 271 drives the breaker 25 to rotate through the spline, and meanwhile, when the breaker 25 goes up and down along the spiral net 24, the rotation of the rotating rod 271 cannot be influenced, the rotating rod and the breaker are relatively independent, and smooth operation of the breaker 25 is guaranteed.
The upper part of the heat exchange bin 5 is provided with a purification pipe 51 for discharging smoke, the heat exchange pipe 6 is in a spiral pipe shape, the lowest part is an air inlet pipe 61 for cold air to enter, and the upper part is an air outlet pipe 62 for hot air to discharge. The spiral tubular heat exchange tube 6 has increased the area of contact of heat exchange tube 6 with the high temperature flue gas, has increased the heat transfer area of heat exchange tube 6, makes things convenient for the heat transfer of the inside cold air of heat exchange tube 6 more, thereby is provided with the fan in the outlet duct 62 and is used for forming the negative pressure in intake pipe 61 department and absorbs the outside air.
When using, starter motor 27, motor 27 drives bull stick 271 and rotates, the rotation of bull stick 271 drives knapper 25 through the spline and rotates, when knapper 25 rotates, guide plate 253 also rises along spiral net 24 along with the pivoted, the rising of guide plate 253 drives knapper 25 and rises along bull stick 271, thereby knapper 25 rotates and drops the lower extreme initial part of spiral net 24 again when rising to the upper end of spiral net 24, thereby rotate and realize going up and down reciprocal, the pressure platform 252 of its below carries out the repression to the material when knapper 25 descends.
Firstly, coal briquettes are put into an upper bin 21 of a feed hopper 2, each blade 26 is driven by a conical column 251 on the upper part of a crusher 25 to rise and rotate, so that the coal briquettes are cut, the cut coal briquettes fall into a spiral net 24, the coal briquettes fall into a lower bin 22 from a middle gap under the drive of a guide plate 253, a pressing table 252 which is lifted back and forth on a leakage net 28 of the lower bin 22 is crushed on the leakage net 28 and falls into a lower discharge pipe 23, and the coal briquettes are ejected into a furnace body 1 by a fan in the discharge pipe 23.
Pulverized coal or coal particles are ignited in the furnace body 1 to be fully combusted, high-temperature flue gas generated after combustion is guided into the heat exchange bin 5 through the discharging pipe 23, the heat exchange pipe 6 in the heat exchange bin 5 is heated, coal slag left after combustion is discharged outside through the ash discharging pipe 4, the flue gas is purified through the purifying pipe 51 after being cooled and finally discharged, the heat exchange pipe 6 sucks the air inlet pipe 61 through the fan in the air outlet pipe 62 to enter cold air, the cold air is heated in the heated heat exchange pipe 6, becomes high-temperature hot gas when coming out of the air outlet pipe 62, and is guided into a required place to be heated or dried.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides an improve coal-fired hot-blast furnace of combustion rate, includes furnace body (1), furnace body (1) top links to each other through heat transfer storehouse (5) that discharge fume pipe (3) and one side set up for it is right cold air in heat exchange tube (6) inside heat transfer storehouse (5) carries out the heat transfer, its characterized in that: the outer wall fixedly connected with of furnace body (1) is used for becoming feeder hopper (2) of coal cinder breakage coal cinder or buggy, feeder hopper (2) inside is provided with spiral net (24) along the lateral wall and rotates breaker (25) that rise, and this breaker (25) upper portion is broken the coal cinder through blade (26) that the spiral was arranged when rotating, and lower part carries out the repression through pressing platform (252) to the coal cinder on leaking net (28) when going up and down along spiral net (24).
2. The coal-fired hot blast stove for improving the combustion rate of claim 1, characterized in that: the feeding hopper (2) is sequentially provided with an upper bin (21), a lower bin (22) and a discharging pipe (23) communicated with the furnace body (1) from top to bottom, and a fan for spraying coal powder and coal particles is arranged in the discharging pipe (23).
3. The coal-fired hot blast stove for improving the combustion rate of claim 2, characterized in that: the crusher (25) is divided into an upper part and a lower part of a conical column (251) and a pressing platform (252), a plurality of blades (26) are spirally arranged on the outer wall of the conical column (251), the volume of the blades (26) is gradually reduced from top to bottom, and the conical column (251) is positioned inside the upper bin (21) in a round hopper shape.
4. The coal-fired hot blast stove for improving the combustion rate of claim 3, characterized in that: the lower surface fixedly connected with guide board (253) of toper post (251), this guide board (253) along the upper surface of spiral net (24) slides, the lower surface of guide board (253) is provided with a plurality of groups ball (2531), go up storehouse (21) with be provided with spiral net (24) of single circle spiral between lower storehouse (22), just it is fixed mutually through vertical baffle between the upper and lower both ends of spiral net (24).
5. The coal-fired hot blast stove for improving the combustion rate of claim 3, characterized in that: the bottom area of the pressing platform (252) is the same as the area of the leakage net (28), the leakage net (28) is arranged in a plate shape, and the pressing platform (252) is positioned in the lower bin (22).
6. The coal-fired hot blast stove for improving the combustion rate of claim 3, characterized in that: the crusher is characterized in that a rotating groove (254) is formed in the axis of the crusher (25), a rotating rod (271) fixedly connected with a conveying shaft of the motor (27) is rotatably arranged in the rotating groove (254), a spline (272) is arranged on the side wall of the rotating rod (271), and the spline (272) slides in a key groove (255) on the side surface of the rotating groove (254).
7. The coal-fired hot blast stove for improving the combustion rate of claim 1, characterized in that: the top in heat transfer storehouse (5) is provided with the purge tube (51) that is used for discharging smog, heat exchange tube (6) set up to the helical tube form, and the below is intake pipe (61) that are used for the cold air to get into, and the top is hot air exhaust outlet duct (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679842.XA CN112013415A (en) | 2020-07-15 | 2020-07-15 | Coal-fired hot-blast stove capable of improving combustion rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679842.XA CN112013415A (en) | 2020-07-15 | 2020-07-15 | Coal-fired hot-blast stove capable of improving combustion rate |
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| Publication Number | Publication Date |
|---|---|
| CN112013415A true CN112013415A (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010679842.XA Pending CN112013415A (en) | 2020-07-15 | 2020-07-15 | Coal-fired hot-blast stove capable of improving combustion rate |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014118614A (en) * | 2012-12-18 | 2014-06-30 | Nippon Steel & Sumitomo Metal | Checker brick |
| CN204583393U (en) * | 2015-01-13 | 2015-08-26 | 宁波市阳光汽车配件有限公司 | The efficient knife combination of automobile non-metal waste crusher |
| CN205878805U (en) * | 2016-05-13 | 2017-01-11 | 芜湖飞尚非金属材料有限公司 | Rotary drum drying device for bentonite |
| CN205980725U (en) * | 2016-08-18 | 2017-02-22 | 江苏万祥锌业有限公司 | Two screw feeding device of flash drying machine |
| CN206131044U (en) * | 2016-10-11 | 2017-04-26 | 李华颖 | Hot -blast furnace and blast furnace |
| CN107626401A (en) * | 2017-10-25 | 2018-01-26 | 周衡 | A kind of multiple feed-processing device for crushing simultaneously automatic discharge |
| CN108972944A (en) * | 2018-09-03 | 2018-12-11 | 东至县科创塑料制品有限公司 | A kind of plastics granulator of the cooling packing in plastic pellet outlet end |
-
2020
- 2020-07-15 CN CN202010679842.XA patent/CN112013415A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014118614A (en) * | 2012-12-18 | 2014-06-30 | Nippon Steel & Sumitomo Metal | Checker brick |
| CN204583393U (en) * | 2015-01-13 | 2015-08-26 | 宁波市阳光汽车配件有限公司 | The efficient knife combination of automobile non-metal waste crusher |
| CN205878805U (en) * | 2016-05-13 | 2017-01-11 | 芜湖飞尚非金属材料有限公司 | Rotary drum drying device for bentonite |
| CN205980725U (en) * | 2016-08-18 | 2017-02-22 | 江苏万祥锌业有限公司 | Two screw feeding device of flash drying machine |
| CN206131044U (en) * | 2016-10-11 | 2017-04-26 | 李华颖 | Hot -blast furnace and blast furnace |
| CN107626401A (en) * | 2017-10-25 | 2018-01-26 | 周衡 | A kind of multiple feed-processing device for crushing simultaneously automatic discharge |
| CN108972944A (en) * | 2018-09-03 | 2018-12-11 | 东至县科创塑料制品有限公司 | A kind of plastics granulator of the cooling packing in plastic pellet outlet end |
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