CN115371071A - Dust collector of living beings granule hot-blast furnace - Google Patents
Dust collector of living beings granule hot-blast furnace Download PDFInfo
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- CN115371071A CN115371071A CN202210856003.XA CN202210856003A CN115371071A CN 115371071 A CN115371071 A CN 115371071A CN 202210856003 A CN202210856003 A CN 202210856003A CN 115371071 A CN115371071 A CN 115371071A
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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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a dust removal device of a biomass particle hot blast stove, which comprises a first dust removal component, a second dust removal component and a third dust removal component; the first dust removal assembly is arranged at the lower end of the feed inlet and comprises a spiral feeder and a dust hood wrapping the outer ring of the spiral feeder, and a telescopic assembly is arranged in the dust hood; the second dust removal assembly is arranged in the dust removal chamber between the combustion chamber and the mixing chamber, and comprises an upper box body, a middle box body and a lower box body; the third dust removal assembly is disposed in the mixing chamber. According to the invention, through the unified arrangement of the first dust removal component, the second dust removal component and the third dust removal component, dust of the biomass fuel and smoke dust generated in the combustion process are removed at different stages, so that gas entering the hot air heat exchanger is cleaner, the service life of the air exchange heat exchanger is prolonged, and the reduction of the efficiency of the hot air furnace is avoided.
Description
Technical Field
The invention belongs to the field of machine manufacturing, and particularly relates to a dust removal device of a biomass particle hot blast stove.
Background
The hot blast stove is a thermodynamic machine, is widely applied in China in the end of the 20 th century 70 s, and becomes an upgrading product of an electric heat source and a traditional steam power heat source in many industries. The hot blast stove has various types and complete series, and is divided into a hand-burning furnace and a machine-burning furnace by a coal feeding mode, and is divided into a coal furnace, an oil furnace, a gas furnace and the like by fuel types.
With the national requirements on environmental and air pollution treatment by energy conservation and emission reduction, the pollution of smoke and dust and harmful gas discharged by coal-fired furnaces to the environment is further reduced, the development and utilization of renewable biomass clean energy sources are improved, and biomass particle hot blast stoves are in the process of being transported.
The biomass hot blast stove is usually provided with a hot air heat exchanger at the tail part of the burner to ensure that clean hot air is produced. The particle fuel burned by the biomass particle hot blast stove is pressed by wood or plant straws, and the particle fuel does not discharge sulfur, so that the particle fuel meets the requirement of environmental protection in principle. However, biomass pellet fuel soot is larger than coal and produces flue gas containing a large amount of particulate matter and unburned materials. If the high-temperature flue gas containing a large amount of particles and unburned carbon enters the hot air heat exchanger, the long-time use of the high-temperature flue gas will inevitably cause thermal fatigue and mechanical wear of steel on the pipe wall of the hot air heat exchanger to cause early failure, and the unburned carbon can be combusted secondarily to damage the hot air heat exchanger, so that the use efficiency of the biomass hot air furnace is influenced. Dust in the fuel also has produced the influence to the combustion effect, and the hot-blast entering drying-machine that the burning produced also produces the influence to the stoving effect after not removing dust carefully, so less dust and the smoke and dust that biomass fuel produced need seek a better solution.
Disclosure of Invention
Aiming at the problems, the invention provides a dust removal device of a biomass particle hot blast stove.
The invention provides a dust removal device of a biomass particle hot blast stove, which comprises a first dust removal component, a second dust removal component and a third dust removal component;
the first dust removal assembly is arranged at the lower end of the feed inlet and comprises a spiral feeder and a dust hood wrapping the outer ring of the spiral feeder, and a telescopic assembly is arranged in the dust hood;
the second dust removal assembly is arranged in the dust removal chamber between the combustion chamber and the mixing chamber, and comprises an upper box body, a middle box body and a lower box body;
the third dust removal assembly is disposed in the mixing chamber.
The dust hood is in a two-layer cylindrical shape, an inner side cylinder is arranged around the spiral feeder, an outer side cylinder and the inner side cylinder are arranged concentrically, one side of the bottom of the outer side cylinder is provided with a dust exhaust hole, and the position of the inner side cylinder, which is close to the bottom, is provided with a dust absorption hole;
a hollow annular cavity is formed between the inner side cylinder and the outer side cylinder, the upper end of the annular cavity is fixed with the top of the combustion chamber, the annular cavity is divided into an upper cavity and a lower cavity by a middle partition plate in the longitudinal direction, and a detachable baffle plate is arranged at the bottom of the annular cavity;
and telescopic assemblies are vertically arranged between the middle partition plate and the top of the combustion chamber and are provided with a plurality of groups.
The second dust removal assembly consists of an upper box body, a middle box body and a lower box body in a dust removal chamber, an air inlet is formed in one side of the lower box body, which is connected with the combustion chamber, and a dust removal hopper is arranged at the bottom of the lower box body; a limiting plate is arranged at the upper end in the middle box body, a fixing plate is arranged at the lower end of the middle box body, and a dust removal bag is arranged between the limiting plate and the fixing plate.
The third dust removal subassembly includes first filter screen and second filter screen, first filter screen is installed at last box and mixing chamber junction, the second filter screen sets up in exhaust pipe front end position, exhaust pipe sets up in the roller below that turns, it sets up in first filter screen below to turn the roller, it rotates respectively to turn the roller both ends and installs on the wall of both sides around the mixing chamber to turn.
Furthermore, the telescopic assembly consists of a plurality of plane four-bar linkages, each plane four-bar linkage consists of four support rods, the joints of the support rods are connected through bolts, the bottommost ends of the plane four-bar linkages are connected with the middle partition plate, and the adjacent plane four-bar linkages are connected through connecting pins; and a slide rail is vertically arranged on the inner wall of the cavity of the annular cavity, the slide rail is parallel to the connecting axis of the connecting pin, the slide rail is matched with a roller at the bottom end of the cross rod, and the other end of the cross rod is fixed on any connecting pin of the planar four-bar linkage.
Further, the inner cylinder and the outer cylinder are uniform in height and equal in height to the screw feeder.
Furthermore, the middle clapboard is installed in an inclined mode, and the dust exhaust hole is formed in one end, inclined downwards, of the middle clapboard.
Furthermore, a plurality of upper grooves are formed above the limiting plate and are connected with first lugs fixed to the periphery of the dust removal bag in a matched mode, the fixing plate is connected with the inner wall of the middle box body through a support, second lugs are fixed to the outer surface of the lower end of the dust removal bag, and the second lugs are matched with lower grooves formed above the fixing plate.
Furthermore, the dust removal bag is the down-trapezoidal, the dust removal bag is inside to be supported by the cage, install the vibrator on the cage, cage and dust removal bag contact site all are provided with the abrasion pad.
Further, first filter screen embedding dust removal chamber's inner wall top, first filter screen mesh is greater than the second filter screen mesh.
The invention has the advantages that:
according to the invention, through the unified arrangement of the first dust removal component, the second dust removal component and the third dust removal component, dust of the biomass fuel and smoke dust generated in the combustion process are removed at different stages, so that gas entering the hot air heat exchanger is cleaner, the service life of the air exchange heat exchanger is prolonged, and the reduction of the efficiency of the hot air furnace is avoided;
according to the invention, the dust removal bag is installed in an embedded mode, so that the dust removal bag is more convenient to replace in the later period, and the dust removal bag is simpler and easier;
according to the invention, the fuel is subjected to dust removal treatment before entering the combustion pool through the installation of the first dust removal assembly, so that the combustion of the fuel is more efficient.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows a schematic structural diagram of a dust removal device of a biomass particle hot blast stove according to an embodiment of the invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
fig. 3 shows an enlarged structural view of a portion B in fig. 1.
In the figure: 1. a combustion chamber; 2. a second filter screen; 3. a dust exhaust hole; 4. a mixing chamber; 5. a dust removal hopper; 6. an exhaust duct; 7. turning over the roller; 8. a first filter screen; 9. a dust chamber; 10. a screw feeder; 11. a planar four-bar linkage; 12. an outer cylinder; 13. an inner cylinder; 14. a dust collection hole; 15. a slide rail; 16. a middle partition plate; 17. a bolt; 18. a connecting pin; 19. a dust removal bag; 20. a vibrator; 21. a cage frame; 22. a first bump; 23. a limiting plate; 24. a support; 25. a fixing plate; 26. and a second bump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the dust removing device of the biomass particle hot blast stove comprises a first dust removing assembly, a second dust removing assembly and a third dust removing assembly, wherein the first dust removing assembly is installed at the lower end of a feed inlet, the feed inlet is positioned at the top of a combustion chamber 1, the second dust removing assembly is arranged in a dust removing chamber 9 between the combustion chamber 1 and a mixing chamber 4, and the third dust removing assembly is arranged in the mixing chamber 4.
Referring to fig. 1 and 2, the first dust removing assembly is used to remove dust before fuel is unburned. The first dust removal assembly comprises a dust hood wrapping the outer ring of the spiral feeder 10, the dust hood is in a two-layer cylindrical shape, the inner side cylinder 13 surrounds the spiral feeder 10, the outer side cylinder 12 and the inner side cylinder 13 are concentrically arranged and are consistent in height, and the dust hood is higher than the spiral feeder 10. And one side of the bottom of the outer cylinder 12 is provided with a dust exhaust hole 3, the dust exhaust hole 3 is connected with a dust exhaust pipeline and communicated with a dust exhaust outlet on the side surface of the hot blast stove, and the dust exhaust pipeline extends to an external recovery box. The inner cylinder 13 is provided with a dust suction hole 14 near the bottom, and the dust suction hole 14 is arranged in the lower cavity.
Constitute a hollow annular chamber between inboard drum 13 and the outside drum 12, the annular chamber top is fixed with combustion chamber 1, the annular chamber is divided into upper and lower two-layer by median septum 16 on vertical, is epicoele and cavity of resorption respectively, baffle can be dismantled in the installation of annular chamber bottom. The middle partition plate 16 is obliquely installed, the lower surface of the middle partition plate 16 is provided with an air suction device and an air blower, dust in the spiral feeder 10 is sucked into and discharged out of the annular cavity, the air suction device and the air blower are uniformly controlled by an external switch, the air blower is started in the upward contraction process of the middle partition plate 16, and the air suction device is started in the downward expansion project of the middle partition plate 16.
Be provided with flexible subassembly perpendicularly between 1 top of median septum 16 and combustion chamber, flexible subassembly comprises a plurality of plane four-bar linkage 11, plane four-bar linkage 11 comprises four spinal branch poles, the branch junction passes through the bolt 17 and connects, plane four-bar linkage 11 bottommost is connected with median septum 16, by connecting pin 18 connection between the plane four-bar linkage 11, topmost plane four-bar linkage 11 and cam contact, the cam is driven by the transmission shaft, the other end of transmission shaft and the output shaft of motor, the perpendicular installation slide rail 15 of annular chamber cavity inner wall, slide rail 15 is parallel with connecting pin 18's connecting axis, the gyro wheel cooperation of slide rail 15 and horizontal pole bottom, on the other end fixed plane four-bar linkage 11's of horizontal pole arbitrary connecting pin 18, slide rail 15 and horizontal pole have confirmed flexible subassembly at the vertical direction flexible. The telescopic assemblies may be provided in multiple sets so that the up-and-down movement of the middle partition 16 is more stable. Two groups are selected in the embodiment, the middle clapboard 16 is pulled by the telescopic assembly to be in an inclined state and forms an included angle of 30-45 degrees with the horizontal direction, and the dust exhaust hole 3 is arranged at one end, inclined downwards, of the middle clapboard 16.
When the dust collecting device is in an initial position, the lowest point of the cam is in contact with the plane four-bar linkage 11, the telescopic support is in a compression state, the space of the upper cavity is very small at the moment, dust is collected in the lower cavity, the motor is started, the transmission shaft drives the cam to move, the telescopic support extends along with the sliding process of the cross rod in the rotating process of the cam, when the highest point of the cam is in contact with the telescopic support, the telescopic support is lifted to the longest point, the dust in the lower cavity is compressed downwards to the dust exhaust hole 3 to be exhausted, the cam starts to perform return movement at the moment, and the telescopic support also gradually recovers to the initial state, so that the circulation is realized.
Referring to fig. 1 and 3, the second dust removing assembly includes a dust removing chamber 9, the dust removing chamber 9 is located between the combustion chamber 1 and the mixing chamber 4, the dust removing chamber 9 is a rectangular box body as high as the hot blast stove, and an outer shell of the dust removing chamber 9 is made of a high temperature resistant material. The dust removal chamber 9 is composed of an upper box body, a middle box body and a lower box body from top to bottom in sequence, an air inlet is formed in one side, connected with the combustion chamber 1, of the lower box body, an air outlet is installed in the upper box body, and the dust removal chamber 9 is communicated with the mixing chamber 4 through the air outlet.
Lower box bottom is provided with dust removal 5, dust removal 5 and lower box bottom fixed connection, dust removal 5 is for falling trapezoidal and highly for half of lower box height, access door is seted up with one side of external contact to dust removal 5.
The dust removal bag dust removal structure is characterized in that a limiting plate 23 is installed at the upper end in the middle box body, a fixing plate 25 is installed at the lower end, an installation position of an upper port of the dust removal bag 19 is reserved between the limiting plate 23 and the inner wall fixed connection of the dust removal chamber 9, a plurality of upper grooves are formed in the upper portion of the limiting plate 23, the grooves are connected with a first protruding block 22 fixed to the periphery of the dust removal bag 19 in a matched mode, and the number of the upper grooves is consistent with the number of the first protruding blocks 22. Limiting plate 23 and dust bag 19 seal the box body upper shed for gaseous can only follow the discharge of dust bag 19 upper shed, fixed plate 25 is connected with clean room 9 through support 24, the fixed second lug 26 of dust bag 19 lower extreme surface, the lower recess cooperation that second lug 26 and fixed plate 25 top were seted up, second lug 26 quantity is unanimous with lower recess quantity. Dust bag 19 is down trapezoidal, 19 inside by cage 21 supports of dust bag, cage 21 all is provided with the wear pad with 19 contact site of dust bag, install vibrator 20 on the cage 21, vibrator 20 is by the outside on-off control of hot-blast furnace.
Dust-containing hot air enters from the air inlet, and when the dust-containing hot air passes through the dust removing hopper 5, part of large-particle dust in the hot air is separated out under the action of gravity and directly falls into the dust removing hopper 5. The dust-containing hot air enters a filtering area of the dust removing bag 19 after passing through the dust removing hopper 5, the air passes through the dust removing bag 19, dust is stopped on the outer surface of the dust removing bag 19, the purified air enters an upper box body through a filter bag opening in the upper end of the dust removing bag 19 and then is discharged from an air outlet to enter the mixing chamber 4, and the vibrator 20 is opened at regular time under the control of a switch to shake off the dust on the surface of the dust removing bag 19.
Referring to fig. 1, the third dust removing assembly is arranged in the mixing chamber 4, the third dust removing assembly comprises a second filter screen 2 arranged at the front end of an exhaust duct 6 in the mixing chamber 4 and a first filter screen 8 arranged at the joint of the upper box body and the mixing chamber 4, the first filter screen 8 is embedded in the upper portion of the inner wall of the dust removing chamber 9, the second filter screen 2 is movably arranged at the air outlet, the meshes of the first filter screen 8 are larger than those of the second filter screen 2, the turning roller 7 is arranged below the first filter screen 8 and above the second filter screen 2, two ends of the turning roller 7 are respectively rotatably arranged on the front side wall and the rear side wall of the mixing chamber 4, the turning roller 7 is driven by a motor, and the turning roller 7 accelerates the mixing of cold air and hot air in the rotating process.
The working mode of the invention is as follows:
when the biomass fuel feeding device works, biomass fuel enters the combustion chamber 1 from the spiral feeder 10, in the feeding process of the spiral feeder 10, dust in the fuel is sucked into the lower cavity of the suction hood from the dust suction hole 14 by the suction fan on the lower surface of the middle partition plate 16, the middle partition plate 16 is pressed downwards to the dust discharge hole 3 in the downward traction process of the telescopic assembly, and then the dust is blown into a dust discharge pipeline from the dust discharge hole 3 by the blower and is discharged into a recovery box outside the combustion chamber 1;
the fuel after dust removal enters a combustion pool at the bottom for combustion, the hot air for combustion enters a dust removal chamber 9 from an air inlet formed in the lower box body, when the hot air passes through a dust removal hopper 5, part of large-particle dust in the hot air is separated out under the action of gravity and directly falls into the dust removal hopper 5; the hot air containing dust enters a filtering area of a dust bag 19 after passing through a dust hopper 5, the air passes through the dust bag 19, the dust is retained on the outer surface of the dust bag 19, the purified air enters an upper box body through a filter bag opening at the upper end of the dust bag 19 and then is discharged from an air outlet to enter a mixing chamber 4, and a vibrator 20 is opened at regular time under the control of a switch to shake off the dust on the surface of the dust bag 19;
the hot air entering the mixing chamber 4 is filtered again through the first filter screen 8, and the filtered air and the cold air entering from the outside of the mixing chamber 4 are mixed with each other at an increased speed under the rotation of the turning roller 7, filtered through the second filter screen 2 and then discharged out of the hot blast stove to enter the hot air heat exchanger through a pipeline.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A dust removal device of a biomass particle hot blast stove is characterized in that,
the dust removal device comprises a first dust removal component, a second dust removal component and a third dust removal component;
the first dust removal assembly is arranged at the lower end of the feeding hole and comprises a spiral feeder (10) and a dust hood wrapping the outer ring of the spiral feeder (10), and a telescopic assembly is arranged in the dust hood;
the second dust removal assembly is arranged in a dust removal chamber (9) between the combustion chamber (1) and the mixing chamber (4), and comprises an upper box body, a middle box body and a lower box body;
the third dedusting assembly is arranged in the mixing chamber (4).
2. The dust removing device of the biomass particle hot blast stove according to claim 1,
the dust hood is in a two-layer cylindrical shape, an inner side cylinder (13) is arranged around the spiral feeder (10), an outer side cylinder (12) and the inner side cylinder (13) are concentrically arranged, one side of the bottom of the outer side cylinder (12) is provided with a dust exhaust hole (3), and a position, close to the bottom, of the inner side cylinder (13) is provided with a dust collection hole (14);
a hollow annular cavity is formed between the inner side cylinder (13) and the outer side cylinder (12), the upper end of the annular cavity is fixed with the top of the combustion chamber (1), the annular cavity is divided into an upper cavity and a lower cavity by a middle partition plate (16) in the longitudinal direction, and a detachable baffle is arranged at the bottom of the annular cavity;
and telescopic assemblies are vertically arranged between the middle clapboard (16) and the top of the combustion chamber (1), and more than one group of telescopic assemblies are arranged.
3. The dust removing device of the biomass particle hot blast stove according to claim 2,
the telescopic assembly consists of four plane connecting rods (11), each plane connecting rod (11) consists of four supporting rods, the joints of the supporting rods are connected through bolts (17), the bottommost end of each plane connecting rod (11) is connected with a middle partition plate (16), and adjacent plane connecting rods (11) are connected through connecting pins (18); slide rails (15) are vertically installed on the inner wall of the cavity of the annular cavity, the connection axes of the slide rails (15) and the connection pins (18) are parallel, the slide rails (15) are matched with rollers at the bottom ends of the cross rods, and the other ends of the cross rods are fixed on any one connection pin (18) of the four-bar plane connecting rod (11).
4. The dust removing device of the biomass particle hot blast stove according to claim 2,
the inner cylinder (13) and the outer cylinder (12) are of the same height and are equal to the screw feeder (10).
5. The dust removing device of the biomass particle hot blast stove according to claim 3,
the middle clapboard (16) is installed in an inclined mode, and the dust exhaust holes (3) are formed in one end, inclined downwards, of the middle clapboard (16).
6. The dust removing device of the biomass particle hot blast stove according to claim 1,
the second dust removal assembly consists of an upper box body, a middle box body and a lower box body in a dust removal chamber (9), one side of the lower box body, which is connected with the combustion chamber (1), is provided with an air inlet, and the bottom of the lower box body is provided with a dust removal hopper (5);
a limiting plate (23) is arranged at the upper end in the middle box body, a fixing plate (25) is arranged at the lower end in the middle box body, and a dust removal bag (19) is arranged between the limiting plate (23) and the fixing plate (25).
7. The dust removing device of the biomass particle hot blast stove according to claim 6,
an upper groove is formed above the limiting plate (23), the upper groove is connected with a first lug (22) fixed to the periphery of the dust removal bag (19) in a matched mode, the fixing plate (25) is connected with the inner wall of the middle box body through a support (24), a second lug (26) is fixed to the outer surface of the lower end of the dust removal bag (19), and the second lug (26) is matched with a lower groove formed above the fixing plate (25).
8. The dust removing device of the biomass particle hot blast stove is characterized in that,
dust bag (19) are down trapezoidal, dust bag (19) are inside to be supported by cage (21), install vibrator (20) on cage (21), cage (21) and dust bag (19) contact site all are provided with the wear pad.
9. The dust removing device of the biomass particle hot blast stove according to claim 1,
third dust removal subassembly includes first filter screen (8) and second filter screen (2), install at last box and mixing chamber (4) junction first filter screen (8), second filter screen (2) set up in exhaust duct (6) front end position, exhaust duct (6) set up in the roller (7) below of turning, it sets up in first filter screen (8) below to turn over roller (7), it rotates respectively to install on the wall of the front and back both sides of mixing chamber (4) to turn over roller (7) both ends.
10. The dust removing device of the biomass particle hot blast stove according to claim 9,
first filter screen (8) embedding dust removal chamber (9)'s inner wall top, first filter screen (8) mesh is greater than second filter screen (2) mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210856003.XA CN115371071A (en) | 2022-07-19 | 2022-07-19 | Dust collector of living beings granule hot-blast furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210856003.XA CN115371071A (en) | 2022-07-19 | 2022-07-19 | Dust collector of living beings granule hot-blast furnace |
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| CN115371071A true CN115371071A (en) | 2022-11-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118066805A (en) * | 2024-04-17 | 2024-05-24 | 河北红光燃料有限责任公司 | Coal-fired hot air drying furnace |
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2022
- 2022-07-19 CN CN202210856003.XA patent/CN115371071A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118066805A (en) * | 2024-04-17 | 2024-05-24 | 河北红光燃料有限责任公司 | Coal-fired hot air drying furnace |
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