CN110423626A - Dry coke quenching primary dedusting van-type coke powder cooling device - Google Patents
Dry coke quenching primary dedusting van-type coke powder cooling device Download PDFInfo
- Publication number
- CN110423626A CN110423626A CN201910401844.XA CN201910401844A CN110423626A CN 110423626 A CN110423626 A CN 110423626A CN 201910401844 A CN201910401844 A CN 201910401844A CN 110423626 A CN110423626 A CN 110423626A
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- Prior art keywords
- cooling tube
- cooling
- van
- coke powder
- cooler bin
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B43/00—Preventing or removing incrustations
- C10B43/02—Removing incrustations
- C10B43/04—Removing incrustations by mechanical means
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Coke Industry (AREA)
Abstract
The present invention provides a kind of dry coke quenching primary dedusting van-type coke powder cooling device, including chute, cooler bin is equipped with below the chute, ash inlet and ash hole is arranged in cooler bin, cooling tube is equipped in the cooler bin, through hole is arranged in the cabinet of cooler bin, and the both ends of cooling tube are protruded into corresponding through hole, and the cooling tube and cooler bin are tightly connected.By the way that independent cooling tube is arranged, and the cabinet of one end of cooling tube and cooler bin is fixed together, cooling tube is mounted on cabinet by the other end by seal box, solve present in cooling collar in the prior art because weld rupture is easy to appear leak and hangs burnt defect.
Description
Technical field
The present invention relates to the recycling of the High-temperature mineral powder of the dry quenched coke powder reclaiming device of field of metallurgy, sintering machine deduster to fill
Set, as in primary dedusting by high-temperature particle, dust collecting system, by high-temperature particle and dust by collecting in sectional type water cooled
It is being discharged after cooling in casing, is being related specifically to a kind of lime-ash heat exchange cooling device.
Background technique
In the recycling of dry coke quenching coke powder and sintering machine duster system, high temperature coke powder needs to carry out cooling down in recycling
Processing, and dry quenching water-cooling sleeve cooler is exactly the dedicated unit that cooling treatment is carried out to high temperature coke powder.Existing dry coke quenching
Water cold sleeve cooler mainly include cooler ontology, napex collect dry cooled coke powder single tine, be located at cooler it is intrinsic in,
Outer tube, water inlet, drainage system and the ash discharge format valve positioned at cooler body bottom portion；From water inlet, drainage system into casing
Constantly injection cooling water, discharge high-temperature water, by progress heat exchange between cooling water and high temperature coke powder to achieve the purpose that cooling.
Existing dry quenching water-cooling sleeve such as authorizes Publication No. CN201439515 U, CN202157052 U, CN202226811
U, CN205115372 U, CN205156633 U, CN205398545 U are to be welded using outer sleeve and inner cylinder by upper and lower blind plate
It is connected together, outer sleeve inner wall and inner tank theca form collet, and outer sleeve and inner cylinder lead to cooling water, and collet is cooling for high temperature coke powder
And passing away, the sundries such as accumulation sludge are easy due to leading to recirculated water bottom in water cold sleeve for a long time, it can not Hand scarf.Water
The whether normal good operation of cold casing determines that can the high temperature coke powder in disposable dust remover smoothly be discharged safely；Due to water-cooled jacket
The pipe range phase washes away through high temperature coke powder, and outer tube metal generates creep, and easily desoldering, welding position desoldering through high temperature corrosion makes
There is internal leakage in water cold sleeve, and leakage recirculated cooling water also results in the coke powder channel hair in water cold sleeve after mixing with coke powder
Dry coke quenching equipment need to be shut down and could replace water cold sleeve after coke powder is cooling, equally influence dry quenching system by raw blocking
Continuous operation, and need to replace entire three layers of casing after water cold sleeve internal leakage, maintenance cost is higher, due to three layers
The water cold sleeve own vol and weight of structure are larger, and disassembly and installation is more difficult；Simultaneously in high temperature and internal use
Circulated inert gas in the case of dismantle online it is abnormally dangerous；The general bottom of water cold sleeve carries out ash discharge using Jameson scheme valve,
Since inleakage is bigger when format valve uses generally under negative pressure state, coke powder is be easy to cause in closed container when air enters
Second burning, aggravation metal generate creep and damage, in addition coke powder be easy to cause coke powder hardened in water cold sleeve, coke powder
Also needed after hardened disassembly cleaning, due to water cold sleeve be mounted on locational space in steel structure frame it is very narrow, therefore pacify
Assembly and disassembly are very inconvenient, general to dismantle the primary needs of water cold sleeve disassembly 12 hours while empty in high temperature and narrow operation
Between in the case of the super large piece article of disassembly be to be in abnormally dangerous work, in addition general water cold sleeve in use usually on
Partial is easily damaged, and when replacement needs integral replacing, causes use cost height.
The temperature of the recyclegas of coke dry quenching furnace is further cooled to about 130 DEG C using heat exchanger after being pressurizeed by circulating fan
Most of afterwards to enter coke dry quenching furnace and coke countercurrent heat-transfer, circulating fan release needs strict control in coke dry quenching furnace, therefore is exchanging heat
The recyclegas that device comes out carries out gas more than needed by prestoring room diffusion valve and is emitted into atmosphere, corresponding with produce load fluctuation
Variation, when production capacity increases, gas flow of having more than needed increases, and as environmental requirement is increasingly stringenter, which is emitted into
Atmosphere needs to discharge again after desulphurization denitration is handled.Directly cooling tube can also be carried out using small blower simultaneously air-cooled.
Summary of the invention
In view of the deficienciess of the prior art, the object of the invention is to thoroughly solve prior art water cold sleeve leak
After cannot use, service life is short, water cold sleeve disassembly is difficult, dismantles after dangerous, maintenance load is big, interior dirt is hardened in line
The defects of cleaning is inconvenient, improves equipment operation ratio, reduces use cost, by using recyclegas have more than needed gas flow into
The cooling coke powder of row, while carrying out the gas more than needed to be warmed to 150 DEG C or more and being easier to handle, it reduces desulphurization denitration and is processed into
This, therefore the device is not only environmentally friendly but also improves service life, and greatly reduces maintenance workload, reduces use cost.
To achieve the above object, the present invention provides the following technical scheme that
Dry coke quenching primary dedusting van-type coke powder cooling device of the present invention, including chute, the chute lower section are set
There is cooler bin, ash inlet and ash hole is arranged in cooler bin, and cooling tube is equipped in the cooler bin, and the cabinet setting of cooler bin is passed through
Perforation, the both ends of cooling tube are protruded into corresponding through hole and are tightly connected with cooler bin.
The present invention is further arranged to, and the cooling tube setting is multiple, and multiple cooling tubes are in layer by ash inlet to ash hole
Shape arrangement.
Further, the cabinet of described cooling tube one end and cooler bin is fixed together, the other end is installed by seal box
On cabinet or both ends all pass through seal box and are mounted on cabinet.
It is cooled down specifically, the cooling tube leads to cooling wind.
Specifically, the cooling tube water flowing is cooled down.
The present invention is further arranged to, and by manhole, lower instrument mounting hole, blow valve port, described goes out the cooler bin
Water-cooled conveyer is set below grey mouth.
The present invention is further arranged to, and is equipped with distributing device at the position of corresponding ash inlet in the cooler bin.
The present invention is further arranged to, and the cabinet two sides are equipped with inlet box and air outlet box, cooling tube import and air inlet
Case connection, cooling tube outlet are connected to air outlet box, and inlet box is equipped with air inlet, and air outlet box is equipped with air outlet.
The dry coke quenching primary dedusting van-type coke powder cooling device also sets up circulating fan, and the air inlet passes through air inducing
Pipe connect with circulating fan diffusion mouth, circulating fan is connect with circulating fan diffusion mouth, the air outlet pass through discharge pipe and
Desulfurizer connection.
The beneficial effects of the present invention are: by being arranged independent cooling tube, and by one end of cooling tube and cooler bin
Cabinet is fixed together, cooling tube is mounted on cabinet by the other end by seal box, solves cooling collar in the prior art
It is existing because weld rupture is easy to appear leak and hangs burnt defect；Cooling collar structure compared with the prior art is set
It sets, structure of the invention is simpler, and at low cost, in addition to this, each cooling tube is independently installed, when it is time for repair, Ke Yidan
Solely disassembly, facilitates installation and maintenance, and gas flow and resistance needed for controlling each cooling tube by control index combustion fan
And cooling effect required for guaranteeing；Cooling tube along ash inlet to ash hole be in layered arrangement, by temperature diffusion principle it is found that
On every layer of cooling tube each cooling tube to wash away caused heat erosion by high temperature coke powder of substantially equal, so, individually to cool down
Pipe is individual, and each cooling tube is integrally damaged to be replaced to a certain extent, and utilization rate is higher；Cooling tube one end and cabinet
Be fixed together, cooling tube is mounted on cabinet by the other end by seal box, both facilitated the peace of cooling tube after setting in this way
Position is set, and can solve activity required after cooling tube expands with heat and contract with cold, cooling tube both ends can also all be incited somebody to action by seal box
Cooling tube is mounted on cabinet, while all cooling tube can also be fixed on cabinet using welding manner；Distributing device setting
Between ash inlet and cooling tube, prevent 700-800 DEG C of high temperature circulation gas in chute to the coke in cooling tube and cooler bin
Powder carries out heat radiation, while it is cooling to prevent the coke powder in chute from accumulation being concentrated to be unfavorable for coke powder, and can reduce red coke powder to cold
But the erosive wear of pipe.
The invention will be further described below in conjunction with the accompanying drawings:
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention
Fig. 2 is the A-A cross-sectional view of Fig. 1 of the present invention
Fig. 3 is the B partial enlarged view of Fig. 2 of the present invention
Fig. 4 is the C partial enlarged view of Fig. 2 of the present invention
Figure label: 1. chutes, 2. maintenance gate valves, 3. cooler bins, 4. flame retardant coatings, 5. gate valves, the conveying of 6. water-cooleds
Machine, 7. cooling tubes, 8. distributing devices, 9. circulating fans, 10. bypass return valves, 11. heat exchangers, 12. circulating fan diffusion mouths, 13.
Induced duct, 14. discharge pipes, 15. desulfuring and denitrifying apparatus, 101. trough outlets, 301. cabinets, 302. manholes, 303. lower instrument
Mounting hole, 304. ash holes, 305. blow valve ports, instrument mounting hole, 307. ash inlets, 308. air outlet box, 309. outlet air on 306.
Mouth, the outlet of 310. inlet boxes, 311. air inlets, 312. through holes, 701. cooling tubes, 702. cooling tube imports, 703. sealings
Box, 704. index combustion fans, 16. temperature measuring devices
Specific embodiment
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Referring to attached drawing 1-3, dry coke quenching primary dedusting van-type coke powder cooling device disclosed by the invention: described including chute 1
Chute 1 below be equipped with cooler bin 3, ash hole 304 and ash inlet 307 is arranged in cooler bin 3；Ash inlet in the cooler bin 3
Corresponding distributing device 8 and multiple cooling tubes 7 are equipped at 307.The setting through hole 312 of cabinet 301 of cooler bin 3, the two of cooling tube 7
End is protruded into corresponding through hole 312.In the present embodiment, described 7 one end of cooling tube and cabinet 301 are fixed together, separately
Cooling tube 7 is mounted on cabinet 301 by one end by seal box 703.Both facilitated the installation of cooling tube 7 fixed after setting in this way
Position, and can solve activity required after cooling tube 7 expands with heat and contract with cold.Specifically, " 7 one end of cooling tube is fixed with cabinet 301 " is
Refer to, cooling tube 7 can with cabinet 301 by added on cooling tube 7 small flange pass through again bolt be installed together and also will
The both ends of cooling tube 7 all pass through seal box 703 and cooling tube are mounted on cabinet 301.Certainly, in the specific implementation, can incite somebody to action
The both ends of cooling tube 7 all pass through seal box 703 and are mounted on cabinet 301, can also be all using welding manner by cooling tube 7
It is fixed on cabinet 301.Its purpose is to prevent external sky for several mounting means between the above cooling tube 7 and cabinet 301
In gas leakage to cabinet 301, to play the role of being tightly connected between cooling tube 7 and cabinet 301, while also solving cooling
Pipe 7 expands with heat and contract with cold required stroke.The cooling tube 7 can be set 1, also can be set it is multiple, as shown in Fig. 1,
Multiple cooling tubes 7 are in layered arrangement by ash inlet 307 to ash hole 304.Every layer of about 7 interlaced arrangement of cooling tube.In this reality
It applies in example, each cooling tube 7 is horizontally disposed and perpendicular to the straight line where ash inlet 307 and ash hole 304, certainly, not with this
For limitation.The cooling tube 7 can also be obliquely installed or is mounted in cabinet 301 with coil form, equally be able to solve background
Problem described in technology.The cooling tube 7 can be arranged as shown in this embodiment it is multiple, can also only setting one, setting one
Shape tube or coil pipe can be used when a.
By the way that independent cooling tube 7 is arranged, and the cabinet 301 of one end of cooling tube 7 and cooler bin 3 is fixed together,
Cooling tube 7 is mounted on cabinet 301 by the other end by seal box 703, is solved present in cooling collar in the prior art
Because weld rupture is easy to appear leak and hangs burnt defect；The setting of cooling collar structure compared with the prior art, this hair
Bright structure is simpler, at low cost, and in addition to this, each cooling tube 7 is independently installed, when it is time for repair, can individually dismantle,
Facilitate installation and maintenance, and gas flow and resistance needed for controlling each cooling tube 7 by controlling index combustion fan guarantee
Required cooling effect；Cooling tube 7 is in layered arrangement along ash inlet 307 to ash hole 304, can by temperature diffusion principle
To know, it is of substantially equal by high temperature coke powder to wash away caused heat erosion for each cooling tube 7 on every layer of cooling tube, so, with single cold
But pipe 7 is individual, and each whole damage of cooling tube 7 is replaced to a certain extent, and utilization rate is higher, reduces on the whole
The maintenance cost of equipment.
The distributing device 8 is arranged between ash inlet 307 and top layer's cooling tube 7, prevents 700-800 DEG C in chute
High temperature circulation gas carries out heat radiation to the coke powder in cooling tube 7 and cooler bin 3, while preventing the coke powder in chute 1 from concentrating heap
It is cooling that product is unfavorable for coke powder, and can reduce red coke powder to the erosive wear of cooling tube 3.The cold wind is cold by cooling tube 7
But pipe import 702 enters, and cools down to cooling tube 3, then again by 701 outflow of cooling tube outlet.By being arranged in cooling tube
Exporting gas flow and resistance needed for the index combustion fan 704 at 701 controls each cooling tube 7 can increase each cooling tube
7 cooling effect.Temperature measuring device 16 (such as temperature sensor) is set at cooling tube outlet 701, detects each cooling tube
7 temperature change, it can be determined that the coke powder cooling effect in cooler bin 3, and judge coke powder level and judge whether needs pair
Coke powder in cooler bin 3 is discharged.
Referring to attached drawing 1-2, the present embodiment is further arranged: the cooler bin 3 also sets up manhole 302, lower instrument peace
Fill hole 303, blow valve port 305, upper instrument mounting hole 306；Water-cooled conveyer 6 is set below the ash hole 304.Described
The inner wall of cabinet 301 is equipped with flame retardant coating 4, reduces red coke powder in the abrasion to cabinet 301；Between the chute 1 and cooler bin 3
Equipped with maintenance gate valve 2, the maintenance gate valve 2 can be opened cold in the observation cooler bin 3 of manhole 302 online after closing
But 7 service condition of pipe and one is for emergency processing；Coke powder temperature is still relatively high after the coke powder in cooler bin is cooling to pass through
Adjust water-cooled conveyer 6 inflow and outflow amount coke powder is cooled down again after be discharged, water-cooled conveyer 6 is by cooler bin 3
Interior coke powder is transported to outside and plays material envelope conveying effect, and coke powder is played in water-cooled conveyer 6 simultaneously after stopping coke discharging powder
Expect that envelope effect at any time can be to water-cooled conveyer by the gate valve 5 closed between ash hole 304 and water-cooled conveyer 6
6 repair, by being mounted on lower instrument mounting hole 303.
Level-sensing device low with the installation in upper instrument mounting hole 306 and high charge level meter monitor coke powder level at any time, reach high material
Discharge is carried out when position, stops discharge when reaching low material position.
It is cooled down specifically, the cooling tube 7 can lead to cooling wind, also can choose logical cooling water and cooled down.
The coke powder in cabinet 301 is cooled down that is, the cooling tube 7 leads to cooling wind；Alternatively, the cooling tube 7 is logical
Cooling water is cooled down to the coke powder in cabinet 301.The present invention is to lead to cooling wind with cooling tube 7 to carry out being cooled to example progress
Illustrate, specific:
Referring to attached drawing 1-4, the present embodiment is further arranged: the dry coke quenching primary dedusting van-type coke powder cooling device is also
Be arranged circulating fan 9,301 two sides of cabinet be equipped with inlet box 310 and air outlet box 308, cooling tube import 702 with into
Bellows 310 are connected to, and cooling tube outlet 701 is connected to air outlet box 308, and inlet box 310 is equipped with air inlet 311, are set in air outlet box 308
There is air outlet 309.The air inlet 311 is connect by induced duct 13 with circulating fan diffusion mouth, in the present embodiment, is followed
Ring blower diffusion mouth 12 is equipped with regulating valve, and circulating fan 9 is connect with regulating valve, and the air outlet 309 passes through discharge pipe 14
It is connect with desulfuring and denitrifying apparatus 15.Circulating fan diffusion mouth 12 discharges about 130 DEG C of gas temperature, pressure about 4000Pa more than needed, together
When with produce load fluctuation corresponding change, when production capacity increases, gas flow of having more than needed therewith increases, and works as production capacity
When increase, the cooling air scale of construction needed for coke powder richness amount increases therewith increases therewith, the general temperature for handling flue gas desulfurization and denitrification
It is easier to handle at 150 DEG C or more, reduces desulphurization denitration processing cost when cooling tube 7 is leaked in long-time service abrasion
When, since the gas entered is still inertia recyclegas, used reliably even if gas leakage is nor affected on using increase
Property and service life.Heat exchanger 11, desulfuring and denitrifying apparatus 15 are the prior art, and structure repeats no more.
The present invention can be not provided with inlet box 310 and air outlet box 308 during air-cooled circulation, at this time cooling tube 7
Cooling tube import 702 is directly diffused regulating valve 12 with circulating fan by induced duct 13 and is connect, and circulating fan 9 is put with circulating fan
Raw edge 12 connects, and the cooling tube outlet 701 of cooling tube 7 is directly connect by discharge pipe 14 with desulfurizer 15.It is cold in order to improve
But effect can also be further added by a small blower, and small blower is directly connected to inlet box 310, and air is directly entered inlet box 310
The cooling air outlet 309 that passes through again is carried out to cooling tube 7 to be discharged.By air inlet 310 and it can go out after 7 wear damage of cooling tube
Directly by the online dismounting and change of cooling tube 7 after the blind plate closing of 309 outside of air port.
Claims (10)
1. a kind of dry coke quenching primary dedusting van-type coke powder cooling device, including chute (1), it is characterised in that: the chute (1)
Lower section is equipped with cooler bin (3), and cooler bin (3) is arranged ash inlet (307) and ash hole (304), is equipped in the cooler bin (3)
Through hole (312) are arranged in the cabinet (301) of cooling tube (7), cooler bin (3), and corresponding through hole is protruded at the both ends of cooling tube (7)
(312) it is tightly connected in cooler bin (3).
2. dry coke quenching primary dedusting van-type coke powder cooling device according to claim 1, it is characterised in that: the cooling tube
(7) setting is multiple, and multiple cooling tubes are in layered arrangement by ash inlet (307) to ash hole (304).
3. dry coke quenching primary dedusting van-type coke powder cooling device according to claim 1, it is characterised in that: the cooling
The cabinet (301) of pipe (7) one end and cooler bin (3) is fixed together, the other end passes through seal box (703) and is mounted on cabinet
(301) on or both ends all pass through seal box (703) and are mounted on cabinet (301).
4. dry coke quenching primary dedusting van-type coke powder cooling device described in any one of claim 1 to 3, feature exist
In: the cooling tube (7) leads to cooling wind and is cooled down.
5. dry coke quenching primary dedusting van-type coke powder cooling device described in any one of claim 1 to 3, feature exist
In: described cooling tube (7) water flowing is cooled down.
6. dry coke quenching primary dedusting van-type coke powder cooling device according to claim 4, it is characterised in that: the cooling
Water is arranged by manhole (302), lower instrument mounting hole (303), blow valve port (305), the ash hole (304) lower section in case (3)
Cold type conveyer (6).
7. dry coke quenching primary dedusting van-type coke powder cooling device according to claim 5, it is characterised in that: the cooling
Water is arranged by manhole (302), lower instrument mounting hole (303), blow valve port (305), the ash hole (304) lower section in case (3)
Cold type conveyer (6).
8. dry coke quenching primary dedusting van-type coke powder cooling device according to claim 1, it is characterised in that: the cooling
Distributing device (8) are equipped at the position of corresponding ash inlet (307) in case (3).
9. dry coke quenching primary dedusting van-type coke powder cooling device according to claim 4, it is characterised in that: the cabinet
(301) two sides are equipped with inlet box (301) and air outlet box (308), and cooling tube import (702) is connected to inlet box (310), cooling tube
Outlet (701) is connected to air outlet box (308), and inlet box (310) is equipped with air inlet (311), and air outlet box (308) is equipped with air outlet
(309)。
10. dry coke quenching primary dedusting van-type coke powder cooling device according to claim 9, it is characterised in that: described dry to put out
Burnt primary dedusting van-type coke powder cooling device is also set up circulating fan (9), the air inlet (311) by induced duct (13) with
Circulating fan diffusion mouth (12) connection, circulating fan are connect with circulating fan diffusion mouth (12), and the air outlet (309) passes through
Discharge pipe (14) is connect with desulfurizer (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401844.XA CN110423626A (en) | 2019-05-15 | 2019-05-15 | Dry coke quenching primary dedusting van-type coke powder cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401844.XA CN110423626A (en) | 2019-05-15 | 2019-05-15 | Dry coke quenching primary dedusting van-type coke powder cooling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110423626A true CN110423626A (en) | 2019-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910401844.XA Pending CN110423626A (en) | 2019-05-15 | 2019-05-15 | Dry coke quenching primary dedusting van-type coke powder cooling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577248A (en) * | 2020-11-24 | 2021-03-30 | 江门市美亚纺织材料有限公司 | Cooling apparatus for production textile auxiliary |
-
2019
- 2019-05-15 CN CN201910401844.XA patent/CN110423626A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577248A (en) * | 2020-11-24 | 2021-03-30 | 江门市美亚纺织材料有限公司 | Cooling apparatus for production textile auxiliary |
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