CN110486078B - Underground local ventilation cooling device - Google Patents
Underground local ventilation cooling device Download PDFInfo
- Publication number
- CN110486078B CN110486078B CN201910913940.2A CN201910913940A CN110486078B CN 110486078 B CN110486078 B CN 110486078B CN 201910913940 A CN201910913940 A CN 201910913940A CN 110486078 B CN110486078 B CN 110486078B
- Authority
- CN
- China
- Prior art keywords
- pipe
- cooling
- iron sheet
- box
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 77
- 238000009423 ventilation Methods 0.000 title description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 97
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 229910052742 iron Inorganic materials 0.000 claims abstract description 49
- 238000005273 aeration Methods 0.000 claims abstract 6
- 239000002893 slag Substances 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 7
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 239000013618 particulate matter Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
- B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a rotary movement with respect to the filtering element
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F3/00—Cooling or drying of air
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ventilation (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses an underground local aeration cooling device which comprises a press-in type fan, an iron sheet air box and a cooling box, wherein the press-in type fan is arranged on the iron sheet air box; the press-in type fan is connected with the iron sheet bellows; a cooling pipe is spirally arranged in the cooling box, one end of the cooling pipe is connected with a water inlet pipe, a water inlet valve is arranged on the water inlet pipe, the other end of the cooling pipe is connected with a communicating pipe, the communicating pipe penetrates through the side wall of the iron sheet bellows to extend, the extending communicating pipe is communicated with an output pipe, water outlets are uniformly formed in the output pipe, a nozzle is connected to the water outlet, one ends of the water inlet pipe and the communicating pipe are arranged in the cooling box, the other ends of the water inlet pipe and the communicating pipe penetrate through the top wall of the cooling box, and the; the cooling box bottom is provided with a disc cooler, the side wall of the cooling box is connected with a water inlet pipe, the water inlet pipe is provided with a control valve, the lower side wall of the cooling box is connected with a water discharge pipe, and the water discharge pipe is provided with a water discharge valve. The problem of local gas temperature is higher in the pit, is difficult for the cooling is solved.
Description
Technical Field
The invention relates to the technical field of mining and mineral separation for improving the recovery and utilization rate of mineral resources, in particular to an underground local ventilation and cooling device.
Background
The mining area belongs to a subtropical area, the highest temperature of the ground surface reaches 400 ℃, the average temperature of fresh air flow sent from the ground surface to the foot of the air inlet shaft is 32 ℃ in 1-10 months, the average temperature of fresh air flow reaches 36 ℃ in 5-7 months, a new method for reducing a local ventilation air supply source in long-distance single-heading tunneling is researched, and the important point is that the temperature of a tunneling operation surface is reduced. The local ventilation plays a role in diluting and removing toxic and harmful gas at a working place, mine dust and rock dust generated in production are removed, the mine dust is prevented from being accumulated and exploded, and the effects of reducing the temperature of an operation site and providing a good production operation environment are achieved. The defects of the conventional local ventilation mode are as follows: only toxic and harmful gases at a working place and mine dust and rock dust generated in production can be diluted and removed, the temperature of an operation site cannot be reduced, and the operation environment cannot be improved.
Disclosure of Invention
The invention aims to provide an underground local ventilation and cooling device, which solves the problems that underground local gas has high temperature and is difficult to cool.
In order to solve the technical problems, the invention adopts the following technical scheme:
the underground local ventilation cooling device comprises a press-in type fan, an iron sheet air box and a cooling box; the press-in type fan is connected with the iron sheet bellows;
a cooling pipe is spirally arranged in the cooling box, one end of the cooling pipe is connected with a water inlet pipe, a water inlet valve is arranged on the water inlet pipe, the other end of the cooling pipe is connected with a communicating pipe, the communicating pipe penetrates through the side wall of the iron sheet bellows to extend, the extending communicating pipe is communicated with an output pipe, water outlets are uniformly formed in the output pipe, a nozzle is connected to the water outlet, one ends of the water inlet pipe and the communicating pipe are arranged in the cooling box, the other ends of the water inlet pipe and the communicating pipe penetrate through the top wall of the cooling box, and the;
the cooling box bottom is provided with a disc cooler, the side wall of the cooling box is connected with a water inlet pipe, the water inlet pipe is provided with a control valve, the lower side wall of the cooling box is connected with a water discharge pipe, and the water discharge pipe is provided with a water discharge valve.
Further, the method comprises the following steps of; the iron sheet bellows sets up to the cylinder, and the diameter of iron sheet bellows is 600 mm.
Further, the method comprises the following steps of; a filter screen is fixedly arranged in the iron sheet bellows, the iron sheet bellows on one side of the filter screen is connected with a collecting box, the collecting box is arranged between the filter screen and the press-in type fan, the top of the collecting box is provided with an opening, the bottom of the collecting box is connected with a slag discharge pipe, and a slag discharge valve is arranged on the slag discharge pipe;
the iron sheet bellows lateral wall is provided with the dead lever, and dead lever and collecting box all set up in same one side of filter screen, and the dead lever sets up to the L type, is provided with the pivot on the dead lever horizontal end of L type, and the pivot is connected with outside motor electricity, is provided with the drive pole in the pivot, and the drive pole lateral wall is provided with soft brush, and soft brush is laminated with the filter screen wall mutually.
Further, the method comprises the following steps of; the drive rod one end is provided with the dwang, and the dwang setting is in the slide rail, and the slide rail setting is on iron sheet bellows lateral wall.
Further, the method comprises the following steps of; and a water tank is arranged on the bottom wall of the iron sheet air box, and the water outlet of the water tank is connected with a water collecting pipe.
Further, the method comprises the following steps of; and the side wall of the iron sheet bellows is provided with an adsorption layer.
Compared with the prior art, the invention has at least one of the following beneficial effects:
1. the temperature of local gas in the pit is high, the gas enters the iron sheet air box through the press-in type fan, water entering from the water inlet pipe enters the cooling pipe of the cooling box, the disc cooler of the cooling box cools the cooling pipe, the water in the cooling pipe is cooled, the cooled water enters the output pipe through the communicating pipe, the spray head connected with the output pipe is used for spraying, the sprayed water plays a certain cooling role in the gas of the iron sheet air box, the cooling box is filled with water, and the disc cooler cools the cooling pipe and the water in the cooling pipe, so that the cooling of the gas is facilitated; the water in the cooling box is supplied through the water inlet pipe and is output through the water outlet pipe.
2. The diameter of the iron sheet bellows is 600mm, so that the gas in the iron sheet bellows can be cooled conveniently.
Drawings
FIG. 1 is a schematic structural sectional view of the present invention.
FIG. 2 is a schematic sectional view at A-A in the present invention.
In the figure: 1-press-in type fan, 2-iron bellows, 3-cooling box, 4-cooling pipe, 5-water inlet pipe, 6-water inlet valve, 7-communicating pipe, 8-output pipe, 9-spray head, 10-disc cooler, 11-water discharge pipe, 12-water discharge valve, 13-filter screen, 14-collecting box, 15-slag discharge pipe, 16-slag discharge valve, 17-fixed rod, 18-rotating shaft, 19-external motor, 20-driving rod, 21-soft brush, 22-rotating rod, 23-sliding rail, 24-water tank, 25-water collecting pipe and 26-adsorption layer.
Detailed Description
Fig. 1-2 are schematic views illustrating the present invention, and the following detailed description is provided with reference to the accompanying drawings and embodiments for better understanding the objects, technical solutions and advantages of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
the underground local ventilation cooling device comprises a press-in type fan 1, an iron sheet air box 2 and a cooling box 3; the press-in type fan 1 is connected with the iron sheet bellows 2;
a cooling pipe 4 is spirally arranged in the cooling box 3, one end of the cooling pipe 4 is connected with a water inlet pipe 5, a water inlet valve 6 is arranged on the water inlet pipe 5, the other end of the cooling pipe 4 is connected with a communicating pipe 7, the communicating pipe 7 extends through the side wall of the iron sheet bellows 2, the extending communicating pipe 7 is communicated with an output pipe 8, water outlets are uniformly formed in the output pipe 8, a spray head 9 is connected and arranged at the water outlets, one ends of the water inlet pipe 5 and the communicating pipe 7 are arranged in the cooling box 3, the other ends of the water inlet pipe 5 and the communicating pipe 7 penetrate through the top wall of the cooling box 3, and the other ends;
the bottom of the cooling box 3 is provided with a disc cooler 10, the upper side wall of the cooling box 3 is connected with a water inlet pipe 27, the water inlet pipe 27 is provided with a control valve 28, the lower side wall of the cooling box 3 is connected with a water discharge pipe 11, and the water discharge pipe 11 is provided with a water discharge valve 12; the temperature of underground local gas is high, the gas enters the iron sheet air box 2 through the press-in type fan 1, water entering the water inlet pipe 5 enters the cooling pipe 4 of the cooling box 3, the disc cooler 10 of the cooling box 3 cools the cooling pipe 4, the water in the cooling pipe 4 is cooled, the cooled water enters the output pipe 8 through the communicating pipe 7, the spray head 9 connected with the output pipe 8 sprays, the sprayed water plays a certain cooling role in the gas of the iron sheet air box 2, meanwhile, the cooling box 3 is filled with water, and the disc cooler 10 cools the cooling pipe 4 and the water in the cooling pipe 4, so that the cooling of the gas is facilitated; the water in the cooling box 3 is supplied through the inlet pipe 27, and the water is discharged through the outlet pipe 11.
Example 2:
on the basis of the embodiment 1, the iron sheet air box 2 is arranged to be a cylinder, and the diameter of the iron sheet air box 2 is 600 mm; the diameter of the iron sheet wind box 2 is 600mm, so that the gas in the iron sheet wind box 2 can be cooled conveniently.
Example 3:
on the basis of the embodiment 1-2, a filter screen 13 is fixedly arranged in the iron sheet bellows 2, the iron sheet bellows 2 between the filter screen 13 and the press-in type fan 1 is connected with a collection box 14, the bottom of the collection box 14 is connected with a slag discharge pipe 15, and the slag discharge pipe 15 is provided with a slag discharge valve 16;
a fixed rod 17 is arranged on the side wall of the iron sheet bellows 2 at the top of the collecting box 14, the fixed rod 17 is L-shaped, a rotating shaft 18 is arranged at the horizontal end of the L-shaped fixed rod 17, the rotating shaft 18 is electrically connected with an external motor 19, a driving rod 20 is arranged on the rotating shaft 18, a soft brush 21 is arranged on the side wall of the driving rod 20, and the soft brush 21 is attached to the wall of the filter screen 13; press-in fan 1 into in 2 gaseous probably contain the particulate matter of iron sheet bellows, the particulate matter can not pass through filter screen 13, the particulate matter deposit that can not pass through the filter screen is in collecting box 14, and simultaneously, particulate matter blocking filter screen 13 can appear, pivot 18 passes through the fixed setting of dead lever 17 on 2 lateral walls of iron sheet bellows, then outside motor 19 drives the motion of pivot 18, the motion of drive rod 20 that pivot 18 is connected, the soft brush 21 object filter screen 13 on the drive rod 20 cleans, avoid the particulate matter to block up filter screen 13.
Example 4:
on the basis of the embodiment 1-3, one end of the driving rod 20 is provided with a rotating rod 22, the rotating rod 22 is arranged in a sliding rail 23, and the sliding rail 23 is arranged on the side wall of the iron sheet bellows 2; the swivelling levers 22 of the swivelling levers 20 move on a slide rail 23.
Example 5:
on the basis of the embodiments 1-4, a water tank 24 is arranged on the bottom wall of the iron sheet air box 2, and a water collecting pipe 25 is connected to the water outlet of the water tank 24; the spray water of the nozzle 9 in the iron sheet air box 2 enters the water tank 24 and is discharged by the water collecting pipe 25.
Example 6:
on the basis of the embodiments 1 to 5, the side wall of the iron sheet bellows 2 is provided with an adsorption layer 26; the adsorption layer 26 may adsorb the sprayed water so that the output air is dried.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (5)
1. The utility model provides a local aeration cooling device in pit which characterized in that: comprises a press-in type fan (1), an iron sheet air box (2) and a cooling box (3); the press-in type fan (1) is connected with the iron sheet air box (2);
a cooling pipe (4) is spirally arranged in the cooling box (3), one end of the cooling pipe (4) is connected with a water inlet pipe (5), a water inlet valve (6) is arranged on the water inlet pipe (5), the other end of the cooling pipe (4) is connected with a communicating pipe (7), the communicating pipe (7) penetrates through the side wall of the iron sheet air box (2) to extend, the extending communicating pipe (7) is communicated with an output pipe (8), water outlets are uniformly formed in the output pipe (8), a spray head (9) is connected and arranged at the water outlet, one ends of the water inlet pipe (5) and the communicating pipe (7) are arranged in the cooling box (3), the other ends of the water inlet pipe (5) and the communicating pipe (7) penetrate through the top wall of the cooling box (3), and the other ends of the water;
the bottom of the cooling box (3) is provided with a disc cooler (10), the upper side wall of the cooling box (3) is connected with a water inlet pipe (27), the water inlet pipe (27) is provided with a control valve (28), the lower side wall of the cooling box (3) is connected with a drain pipe (11), and the drain pipe (11) is provided with a drain valve (12);
a filter screen (13) is fixedly arranged in the iron sheet bellows (2), the iron sheet bellows (2) on one side of the filter screen (13) is connected with a collecting box (14), the collecting box (14) is arranged between the filter screen (13) and the press-in type fan (1), the top of the collecting box (14) is provided with an opening, the bottom of the collecting box (14) is connected with a slag discharge pipe (15), and the slag discharge pipe (15) is provided with a slag discharge valve (16);
iron sheet bellows (2) lateral wall is provided with dead lever (17), and dead lever (17) and collecting box (14) all set up the same one side at filter screen (13), dead lever (17) set up to the L type, be provided with pivot (18) on dead lever (17) the horizontal end of L type, pivot (18) are connected with outside motor (19) electricity, be provided with in pivot (18) and drive pole (20), drive pole (20) lateral wall is provided with soft brush (21), soft brush (21) and filter screen (13) are laminated mutually.
2. The downhole localized aeration cooling device of claim 1, wherein: the iron sheet bellows (2) set up to the cylinder, the diameter of iron sheet bellows (2) is 600 mm.
3. The downhole localized aeration cooling device of claim 1, wherein: one end of the driving rod (20) is provided with a rotating rod (22), the rotating rod (22) is arranged in a sliding rail (23), and the sliding rail (23) is arranged on the side wall of the iron sheet air box (2).
4. The downhole localized aeration cooling device of claim 1, wherein: a water tank (24) is arranged on the bottom wall of the iron sheet air box (2), and a water outlet of the water tank (24) is connected with a water collecting pipe (25).
5. The downhole localized aeration cooling device of claim 1, wherein: and an adsorption layer (26) is arranged on the side wall of the iron sheet air box (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910913940.2A CN110486078B (en) | 2019-09-25 | 2019-09-25 | Underground local ventilation cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910913940.2A CN110486078B (en) | 2019-09-25 | 2019-09-25 | Underground local ventilation cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110486078A CN110486078A (en) | 2019-11-22 |
| CN110486078B true CN110486078B (en) | 2021-02-19 |
Family
ID=68544322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910913940.2A Active CN110486078B (en) | 2019-09-25 | 2019-09-25 | Underground local ventilation cooling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110486078B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204691812U (en) * | 2015-04-17 | 2015-10-07 | 广东梅雁吉祥水电股份有限公司 | A kind of mine dust removing device |
| CN106948856A (en) * | 2017-05-15 | 2017-07-14 | 辽宁工程技术大学 | A kind of mine local cooling device and method |
| CN207131646U (en) * | 2017-06-26 | 2018-03-23 | 白银中天化工有限责任公司 | A kind of cooling device for water-jet pump water tank |
| CN207033481U (en) * | 2017-08-14 | 2018-02-23 | 陈治全 | Underground coal mine heat sink |
| CN208534523U (en) * | 2018-06-04 | 2019-02-22 | 安徽工业大学 | A kind of metal mine underground heat disaster environment ventilation cooling system |
| CN209163853U (en) * | 2018-09-02 | 2019-07-26 | 黄继品 | A kind of underground coal mine ventilation device |
| CN209289593U (en) * | 2018-11-02 | 2019-08-23 | 奎达高分子材料科技(宜兴)有限公司 | Cooling device is used in a kind of PVB production of good cooling results |
-
2019
- 2019-09-25 CN CN201910913940.2A patent/CN110486078B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110486078A (en) | 2019-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201818320U (en) | Horizontal turbulence ball packing dust collector for mine | |
| CN109779675B (en) | Composite dust removal and purification system for treating ore drawing dust of underground mine drop shaft | |
| CN204627652U (en) | A kind of coal mine dedusting device | |
| CN110694399A (en) | Method and system for treating steel slag flue gas | |
| CN201871300U (en) | Wet dedusting device of self-heating furnace | |
| CN106621724A (en) | Flue gas desulfurization and dust-whitening integrated device | |
| CN110486078B (en) | Underground local ventilation cooling device | |
| CN202823065U (en) | External-spraying type anti-abrasion venturi dust removal device | |
| CN205073806U (en) | Portable intelligent mining explosion -proof dust remover | |
| CN2806465Y (en) | Dust-removing integrated system for coke oven | |
| CN205415175U (en) | Dust type glass polisher | |
| CN201016637Y (en) | Dry-type purging device for large scale air cooling system heating radiator | |
| CN201619896U (en) | Automatic tracking dedusting system for paddle coal feeder | |
| CN102305096A (en) | Medium-wind pressure air drilling dedusting system | |
| CN205955676U (en) | Gas drilling is with buffering dust collector | |
| CN206874303U (en) | A kind of mining dust catcher | |
| CN202228103U (en) | A moderate air pressure air drilling dedusting system | |
| CN210394480U (en) | Intermediate frequency furnace smelting production line with dust removal function | |
| CN208678681U (en) | A kind of flue gas condensing and dust removal integrated plant | |
| CN106437819A (en) | Dust removal system based on mine cooling system | |
| CN209307410U (en) | A kind of slag iron separation device of manganese-silicon production | |
| CN205495202U (en) | Wash dust shaker | |
| CN207108913U (en) | A kind of lightweight oil-shale grading dry distillation equipment | |
| CN100547341C (en) | The dry type purger of large-scale air-cooled system air-cooled radiator | |
| CN110551896A (en) | intermediate frequency furnace smelting production line with dust removal function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |