CN108917414A - A kind of gas-solid heat exchange device and its working method - Google Patents
A kind of gas-solid heat exchange device and its working method Download PDFInfo
- Publication number
- CN108917414A CN108917414A CN201810856998.3A CN201810856998A CN108917414A CN 108917414 A CN108917414 A CN 108917414A CN 201810856998 A CN201810856998 A CN 201810856998A CN 108917414 A CN108917414 A CN 108917414A
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- China
- Prior art keywords
- gas
- gas collection
- cooling storehouse
- vane
- surge bunker
- 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.)
- Pending
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- 239000007787 solid Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 69
- 238000001816 cooling Methods 0.000 claims abstract description 65
- 239000004744 fabric Substances 0.000 claims abstract description 17
- 239000002918 waste heat Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000012856 packing Methods 0.000 claims abstract description 10
- 239000011343 solid material Substances 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 3
- 230000009970 fire resistant effect Effects 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000002688 persistence Effects 0.000 claims description 2
- 230000002123 temporal effect Effects 0.000 claims description 2
- 239000000571 coke Substances 0.000 description 9
- 238000010791 quenching Methods 0.000 description 6
- 230000000171 quenching effect Effects 0.000 description 6
- 238000011084 recovery Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Coke Industry (AREA)
Abstract
The present invention relates to a kind of gas-solid heat exchange device and its working methods, described device includes the surge bunker set gradually from top to bottom, cooling storehouse and discharge cone bucket, the center on discharge cone bucket top sets central feeder, the periphery on discharge cone bucket top sets cloth vane, and cloth vane and central feeder are separately connected external air supply device；Seal the top that feeding device is set to surge bunker；It is connected between surge bunker and cooling storehouse by necking down pipeline, the space behind the cooling storehouse top surface on the outside of undergauge pipeline and cooling storehouse side wall, material natural packing between charge level forms the gas collection space of annular；Above the cooling storehouse of the gas collection space or outside sets gas collection vane, and gas collection vane is connected to multiple communicating pipes by circumferentially arranged with gas collection space, and the air outlet of gas collection vane connects external waste heat boiler additionally by pipeline.The characteristics of present invention has masonry structure simple, and system resistance is small, long service life.
Description
Technical field
The present invention relates to gas-solid heat exchange and heat recovery technology field more particularly to a kind of gas-solid heat exchange device and its work
Method.
Background technique
In the waste heat reclaiming process such as Dry Quenching technique, sinter waste heat reclaiming process, often need a large amount of aobvious to carrying
The high-temp solid material of heat carries out waste heat recycling, and usual way is using the circulating air not chemically reacted with solid material
Body cools down high-temp solid material, then recycles the heat that circulating air carries by waste heat boiler.
Currently, using heat exchange container of the coke dry quenching furnace as the red coke of high temperature in dry coke quenching technique, coke is packed into via fire door
In the shaft furnace structure, from top to bottom by prestoring area, cloth vane area, chute area, cooling zone, with the circulation fed from shaft furnace bottom
Gas carries out reverse heat-exchange and is discharged from shaft furnace bottom.In the coke cooling procedure, gas and coke carry out gas in chute area
Gu the cantilevered structure of lock out operation, chute area masonry is subjected to the load from top masonry, while being also subjected to temperature fluctuation and causing
Thermal stress.The chute structure of coke dry quenching furnace is although ingenious, but operating condition is harsh, and gas solid separation process gas flow area is steep
So reduce, system resistance is caused to increase, and is not suitable for the low solid material heat exchange of other voidages.
In sinter waste heat reclaiming process, it is common to use the cold technique of ring recycles sintering mine sensible heat, but the cold technique of ring uses
Be classified recovery waste heat mode, be only capable of recycling one to three-level cooling air sensible heat, the cooling air for keeping three-level later it is a large amount of
Sensible heat is lost in the form of low temperature waste gas, and the efficiency of recovery waste heat is lower.
Summary of the invention
The present invention provides a kind of gas-solid heat exchange device and its working methods, have masonry structure simple, and system resistance is small,
The characteristics of long service life.
In order to achieve the above object, the present invention is implemented with the following technical solutions：
A kind of gas-solid heat exchange device, including surge bunker, cooling storehouse and the discharge cone bucket set gradually from top to bottom, discharge cone
The center on bucket top sets central feeder, and the periphery on discharge cone bucket top sets cloth vane, cloth vane and central feeder point
It Lian Jie not external air supply device；It further include sealing feeding device and gas collection vane；The sealing feeding device is set to buffering
The top in storehouse；It is connected between surge bunker and cooling storehouse by necking down pipeline, cooling storehouse top surface and cooling storehouse on the outside of undergauge pipeline
Space after side wall, material natural packing between charge level forms the gas collection space of annular；In the cold of the gas collection space
But above storehouse or outside sets gas collection vane, and gas collection vane passes through circumferentially arranged multiple communicating pipes and gas collection
The air outlet of space connection, gas collection vane connects external waste heat boiler additionally by pipeline.
The surge bunker is cylindrical shape, spheroidal, cone or rectangular warehouse.
The gas collection vane is constant section duct or varying-arca channel, when gas collection vane is varying-arca channel,
It is gradually increased without leave far from air outlet one end to air outlet one end in it.
Blast cap is set at the top of the center feeder, blast cap passes through vertical central air duct, set on central air duct lower part
One word air duct or cross air duct connect external air supply device, and junction sets volume adjusting apparatus respectively.
The inner wall of the gas collection vane is lined with fire-resistant heat insulating material, and outside sets adiabator layer.
A kind of working method of gas-solid heat exchange device, includes the following steps：
1) the sealed feeding device of high-temp solid material is interrupted or is continuously fitted into surge bunker, the temporal persistence in surge bunker
Afterwards, the necking down pipeline through surge bunker bottom enters in cooling storehouse；
2) high-temp solid material is through falling behind natural packing in cooling storehouse under necking down pipeline, in cooling storehouse top circumferentially shape
At the interface of gas and feed separation；
3) in the bottom of cooling storehouse, by central feeder air feed from inside to outside, by cloth vane ecto-entad air feed,
And the air quantity of air feed is adjusted by volume adjusting apparatus；The low-temperature circulating gas and high-temp solid material of infeed fill in cooling storehouse
After dividing heat exchange, solid material after cooling is discharged through discharge cone bucket；
4) low-temperature circulating gas is uniformly distributed and flows up in cooling storehouse, after completing heat exchange with high-temp solid material,
It concentrates in the gas collection space at the top of cooling storehouse, is collected by gas collection vane, recycled eventually by external waste heat boiler
Heat therein.
Compared with prior art, the beneficial effects of the invention are as follows：
1) cooling procedure of material is completed in storage and cooling two functional areas respectively, and pre- storage can adapt to all kinds of
It has a rest, continuous loading operation and inspection operation, and impact of the material to the resistance to material of masonry in charging process can be buffered；Cooling storehouse is used for object
Material and gas converting heat；
2) it is connected between cooling storehouse and pre- storage by necking down pipeline, shape when making to fall in cooling storehouse under high-temp solid material
At the rotary table material heap of natural packing, so that the flow area of device interior air-flow be made to remain maximum, system resistance is reduced；
3) the space shape after the cooling storehouse top surface on the outside of undergauge pipeline and cooling storehouse side wall, material natural packing between charge level
The gas collection space circularized is conducive to the collection of gas after gas collection vane is exchanged heat；
4) the conventional masonry structure used compared to coke dry quenching furnace, avoids the appearance of cantilevered structure, damages masonry structure
Bad risk minimizes；
5) using sealing feeding device charging, the stabilization of system pressure when being able to maintain that continuous charging or batch charging, and
The loss of dust when preventing from charging；
5) apparatus structure is simple, and long service life, system resistance is small, especially suitable for high materialbeds comminution solid material waste heat
It is used when recycling.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of gas-solid heat exchange device of the present invention.
In figure：1. sealing 2. surge bunker of feeding device, 3. necking down pipeline, 4. gas collection vane, 5. cooling storehouse, 6. wind
8. discharge cone bucket of the central feeder of cap 7., 9. cloth vane
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing：
As shown in Figure 1, a kind of gas-solid heat exchange device of the present invention, including the surge bunker 2, cold set gradually from top to bottom
But storehouse 5 and discharge cone bucket 8, the center on 8 top of discharge cone bucket set central feeder 7, and the periphery on 8 top of discharge cone bucket sets cloth wind
Ring 9, cloth vane 9 and central feeder 7 are separately connected external air supply device；It further include sealing feeding device 1 and gas collection
Vane 4；The sealing feeding device 1 is set to the top of surge bunker 2；Connected between surge bunker 2 and cooling storehouse 5 by necking down pipeline 3
It connects, the space after 5 side wall of 5 top surface of cooling storehouse and cooling storehouse, material natural packing on the outside of undergauge pipeline 3 between charge level forms ring
The gas collection space of shape；Above the cooling storehouse 5 of the gas collection space or outside sets gas collection vane 4, gas collection
Vane 4 is connected to multiple communicating pipes by circumferentially arranged with gas collection space, in addition the air outlet of gas collection vane 4 leads to
Piping connects external waste heat boiler.
The surge bunker 2 is cylindrical shape, spheroidal, cone or rectangular warehouse.
The gas collection vane 4 is constant section duct or varying-arca channel, and gas collection vane 4 is varying-arca channel
When, inside it is gradually increased without leave far from air outlet one end to air outlet one end.
Blast cap 6 is set at the top of the center feeder 7, blast cap 6 passes through vertical central air duct, is set to central air duct lower part
A word air duct or cross air duct connect external air supply device, and junction sets volume adjusting apparatus respectively.
The inner wall of the gas collection vane 4 is lined with fire-resistant heat insulating material, and outside sets adiabator layer.
A kind of working method of gas-solid heat exchange device, includes the following steps：
1) the sealed feeding device 1 of high-temp solid material is interrupted or is continuously fitted into surge bunker 2, in surge bunker 2 temporarily
After stop, the necking down pipeline 3 through 2 bottom of surge bunker enters in cooling storehouse 5；
2) high-temp solid material is through falling behind natural packing in cooling storehouse 5 under necking down pipeline 3, on 5 top of cooling storehouse along week
To the interface for forming gas and feed separation；
3) in the bottom of cooling storehouse 5, by central feeder 7 air feed from inside to outside, pass through 9 ecto-entad of cloth vane and supply
Wind, and pass through the air quantity of volume adjusting apparatus adjusting air feed；The low-temperature circulating gas and high-temp solid material of infeed are in cooling storehouse 5
After interior abundant heat exchange, solid material after cooling is discharged through discharge cone bucket 8；
4) low-temperature circulating gas is uniformly distributed and flows up in cooling storehouse 5, after completing heat exchange with high-temp solid material,
It concentrates in the gas collection space at 5 top of cooling storehouse, is collected by gas collection vane 4, returned eventually by external waste heat boiler
Receive heat therein.
In the present invention, the main body of the gas-solid heat exchange device is made of the feed bin of two inner lining refractory block masonries, respectively
Surge bunker 2 and cooling storehouse 5, wherein surge bunker 2 is used to of short duration storage high-temp solid material and buffers high-temp solid material be packed into
To the impact of refractory brick marshalling in journey, cooling storehouse 5 is for realizing the cooling heat transfer process of high-temp solid material and realizes gas-solid point
From.Surge bunker 2 is arranged concentrically with about 5 cooling storehouse and is connected by necking down pipeline 3, the high-temp solid object fallen in surge bunker 2
Expect under the necking down effect of necking down pipeline 3, under fall behind in 5 inner top natural packing of cooling storehouse and go out round table-like material heap, thus cold
But 5 top periphery of storehouse forms gas collection space.
Sealing feeding device 1 is set to the top of surge bunker 2, system pressure when for maintaining continuously charging or batch charging
Stabilization, and prevent charging when dust loss can also realize bell on the basis of sealing feeding device 1 as needed
The uniform distributions mode such as cloth or rotation cloth, generates segregation after entering surge bunker 2 to avoid material.
The section of gas collection vane 4 is the circulating line structure of round ellipse or polygon, is arranged in cooling storehouse 5
The outside of 5 top wall of top circumference direction or cooling storehouse, passes through the gas collection space of several communicating pipes and 5 top of cooling storehouse
Connection, for collects carrying sensible heat high temperature circulation gas and direct it towards waste heat boiler, because air-flow along gas collection direction not
It is disconnected to collect, gas collection vane 4 can be set to the pipeline of section gradual change.
Discharge cone bucket 8 is rounding wimble structure, is set to 5 bottom of cooling storehouse, accepts the solid material to fall from cooling storehouse 5, together
The outlet of gas-solid heat exchange device and the space of even distributing wind is discharged in Shi Zuowei solid material.The center being arranged in discharge cone bucket 8
Feeder 7 and 9 structure of cloth vane are that the prior art is (" a kind of referring to application No. is 200710158949.4 patent documents
Special-purpose gas supplying device for coke dry quenching unit "), low-temperature circulating gas is fed simultaneously by central feeder 7 and cloth vane 9, by adjusting two
The ratio of part air feed can achieve the effect that even distributing wind exchanges heat in cooling storehouse 5.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of gas-solid heat exchange device, including surge bunker, cooling storehouse and the discharge cone bucket set gradually from top to bottom, discharge cone bucket
The center on top sets central feeder, and the periphery on discharge cone bucket top sets cloth vane, cloth vane and central feeder difference
Connect external air supply device；It is characterized in that, further including sealing feeding device and gas collection vane；The sealing feeding device
Set on the top of surge bunker；It is connected between surge bunker and cooling storehouse by necking down pipeline, the cooling storehouse top surface on the outside of undergauge pipeline
The gas collection space of annular is formed with the space after cooling storehouse side wall, material natural packing between charge level；In the gas collection
Above the cooling storehouse in space or outside sets gas collection vane, gas collection vane by circumferentially arranged multiple communicating pipes with
The air outlet of gas collection space connection, gas collection vane connects external waste heat boiler additionally by pipeline.
2. a kind of gas-solid heat exchange device according to claim 1, which is characterized in that the surge bunker is cylinder-shaped, ball
Shape, cone or rectangular warehouse.
3. a kind of gas-solid heat exchange device according to claim 1, which is characterized in that the gas collection vane is cross-section
Pipeline or varying-arca channel, when gas collection vane is varying-arca channel, inside without leave far from air outlet one end to air outlet one
End is gradually increased.
4. a kind of gas-solid heat exchange device according to claim 1, which is characterized in that set wind at the top of the center feeder
Cap, blast cap connect external air feed dress by vertical central air duct, set on a word air duct of central air duct lower part or cross air duct
It sets, and junction sets volume adjusting apparatus respectively.
5. a kind of gas-solid heat exchange device according to claim 1, which is characterized in that the interior wall liner of the gas collection vane
There is fire-resistant heat insulating material, outside sets adiabator layer.
6. a kind of working method of gas-solid heat exchange device as described in claim 1, includes the following steps：
1) the sealed feeding device of high-temp solid material is interrupted or is continuously fitted into surge bunker, in surge bunker after temporal persistence,
Necking down pipeline through surge bunker bottom enters in cooling storehouse；
2) high-temp solid material circumferentially forms gas on cooling storehouse top through falling behind natural packing under necking down pipeline in cooling storehouse
The interface of body and feed separation；
3) in the bottom of cooling storehouse, by central feeder air feed from inside to outside, by cloth vane ecto-entad air feed, and lead to
Cross the air quantity that volume adjusting apparatus adjusts air feed；The low-temperature circulating gas and high-temp solid material of infeed sufficiently change in cooling storehouse
After heat, solid material after cooling is discharged through discharge cone bucket；
4) low-temperature circulating gas is uniformly distributed and flows up in cooling storehouse, after completing heat exchange with high-temp solid material, concentrates
It in the gas collection space at the top of cooling storehouse, is collected by gas collection vane, wherein eventually by the recycling of external waste heat boiler
Heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810856998.3A CN108917414A (en) | 2018-07-31 | 2018-07-31 | A kind of gas-solid heat exchange device and its working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810856998.3A CN108917414A (en) | 2018-07-31 | 2018-07-31 | A kind of gas-solid heat exchange device and its working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108917414A true CN108917414A (en) | 2018-11-30 |
Family
ID=64393409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810856998.3A Pending CN108917414A (en) | 2018-07-31 | 2018-07-31 | A kind of gas-solid heat exchange device and its working method |
Country Status (1)
| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506493A (en) * | 2018-12-19 | 2019-03-22 | 中冶焦耐(大连)工程技术有限公司 | A kind of double half ball pine material layer fillers |
| CN110360845A (en) * | 2019-07-10 | 2019-10-22 | 钢铁研究总院 | Ventilation terminal system and gas-solid heat exchange method used in a kind of gas-solid heat exchange process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5210962A (en) * | 1991-09-13 | 1993-05-18 | Jones Jr John B | Vertical shaft processor |
| CN206593486U (en) * | 2016-12-30 | 2017-10-27 | 中冶长天国际工程有限责任公司 | A kind of plate belt feeder unloading type vertical cooling machine |
| CN108088236A (en) * | 2018-01-18 | 2018-05-29 | 南京苏冶钙业技术有限公司 | Industry calcining shaft kiln |
| CN208779961U (en) * | 2018-07-31 | 2019-04-23 | 中冶焦耐(大连)工程技术有限公司 | A kind of gas-solid heat exchange device |
-
2018
- 2018-07-31 CN CN201810856998.3A patent/CN108917414A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5210962A (en) * | 1991-09-13 | 1993-05-18 | Jones Jr John B | Vertical shaft processor |
| CN206593486U (en) * | 2016-12-30 | 2017-10-27 | 中冶长天国际工程有限责任公司 | A kind of plate belt feeder unloading type vertical cooling machine |
| CN108088236A (en) * | 2018-01-18 | 2018-05-29 | 南京苏冶钙业技术有限公司 | Industry calcining shaft kiln |
| CN208779961U (en) * | 2018-07-31 | 2019-04-23 | 中冶焦耐(大连)工程技术有限公司 | A kind of gas-solid heat exchange device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506493A (en) * | 2018-12-19 | 2019-03-22 | 中冶焦耐(大连)工程技术有限公司 | A kind of double half ball pine material layer fillers |
| CN109506493B (en) * | 2018-12-19 | 2024-03-19 | 中冶焦耐(大连)工程技术有限公司 | Double-hemispherical-ring loosening material layer filler |
| CN110360845A (en) * | 2019-07-10 | 2019-10-22 | 钢铁研究总院 | Ventilation terminal system and gas-solid heat exchange method used in a kind of gas-solid heat exchange process |
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