CN112980538A - High-temperature furnace ash recycling method and device - Google Patents
High-temperature furnace ash recycling method and device Download PDFInfo
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- CN112980538A CN112980538A CN202110342228.9A CN202110342228A CN112980538A CN 112980538 A CN112980538 A CN 112980538A CN 202110342228 A CN202110342228 A CN 202110342228A CN 112980538 A CN112980538 A CN 112980538A
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- temperature furnace
- raw coal
- mixture
- ash
- furnace dust
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- 238000004064 recycling Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 50
- 239000000428 dust Substances 0.000 claims abstract description 42
- 239000003245 coal Substances 0.000 claims abstract description 39
- 239000011230 binding agent Substances 0.000 claims abstract description 26
- 238000002156 mixing Methods 0.000 claims abstract description 23
- 239000007787 solid Substances 0.000 claims abstract description 14
- 238000003860 storage Methods 0.000 claims abstract description 8
- 239000002956 ash Substances 0.000 claims description 41
- 239000000203 mixture Substances 0.000 claims description 37
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 15
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- KSSNXJHPEFVKHY-UHFFFAOYSA-N phenol;hydrate Chemical compound O.OC1=CC=CC=C1 KSSNXJHPEFVKHY-UHFFFAOYSA-N 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims description 2
- 239000010883 coal ash Substances 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000004484 Briquette Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/48—Solid fuels essentially based on materials of non-mineral origin on industrial residues and waste materials
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1625—Integration of gasification processes with another plant or parts within the plant with solids treatment
- C10J2300/1628—Ash post-treatment
- C10J2300/1631—Ash recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
A high-temperature furnace dust recycling device comprises a circulating fluidized bed gas furnace, wherein the circulating fluidized bed gas furnace is sequentially connected with a vertical plate cooler, a first metering belt, a first-stage coulter type stirring mixer, a second-stage double-shaft stirring mixer, a double-roll extruder and a dryer, the first-stage coulter type stirring mixer is also sequentially connected with a second metering belt, a centrifugal pump and a binder mixing kettle, and the second-stage double-shaft stirring mixer is also sequentially connected with a third metering belt and a raw coal storage tank; the invention also discloses a high-temperature furnace ash recycling method. The device can realize the purposes of processing high-temperature furnace dust into solid coal for cyclic utilization, continuous automatic operation, no dust emission and environmental protection.
Description
Technical Field
The invention belongs to the technical field of furnace ash recovery, relates to a high-temperature furnace ash recovery and reuse device, and further relates to a high-temperature furnace ash recovery and reuse method.
Background
Among the various types of gas generating furnaces, circulating fluidized bed gas furnaces are popular because of their advantages of cleanliness, high efficiency, high productivity, low running cost, safe and stable running, etc., and are widely used in various industries such as alumina, steel, ceramics, coking, carbon, synthetic ammonia, etc. However, circulating fluidized bed gas furnaces also have some disadvantages. For example, gas making is performed under oxygen-free conditions, a large amount of fine dust and coal particles are easily separated out in the reaction cracking process, and dust captured in coal gas forms high-temperature furnace dust. The high-temperature furnace ash is a product of oxidative cracking, has different particle sizes from dozens of meshes to hundreds of meshes, cannot be naturally discharged, stored, transported and used, and belongs to high-risk solid waste in a circulating fluidized bed gas furnace. The total accounting is carried out, the resource waste is large, and the environmental protection and safety pressure are large.
The conventional treatment methods of the existing high-temperature furnace ash are respectively coal making and gas making by returning, wherein the coal making is prepared by directly mixing the high-temperature furnace ash and a small part of raw coal. The existing briquette coal has the following defects:
(1) the high-temperature furnace dust cannot be fully recycled;
(2) the raised dust is large and is not easy to treat;
(3) the briquette can not be fully combusted, and the resource waste is increased.
Disclosure of Invention
The first purpose of the invention is to provide a high-temperature furnace ash recycling device, which solves the problem that the high-temperature furnace ash in the prior art can not be fully recycled.
The second purpose of the invention is to provide a method for recycling high-temperature furnace ash, which solves the problem of overlarge pollution caused by the existing high-temperature furnace ash.
The first technical scheme is that the high-temperature furnace dust recycling device comprises a circulating fluidized bed gas furnace, wherein the circulating fluidized bed gas furnace is sequentially connected with a vertical plate cooler, a first metering belt, a first-stage coulter type stirring mixer, a second-stage double-shaft stirring mixer, a double-roll extruder and a dryer, the first-stage coulter type stirring mixer is further sequentially connected with a second metering belt, a centrifugal pump and a binder mixing kettle, and the second-stage double-shaft stirring mixer is further sequentially connected with a third metering belt and a raw coal storage tank.
The present invention is also characterized in that,
and a cooling jacket is arranged outside the shell of the vertical plate cooler.
The second technical scheme adopted by the invention is that a high-temperature furnace ash recycling method uses a high-temperature furnace ash recycling device, and specifically comprises the following steps:
step 1, taking out high-temperature furnace dust from a circulating fluidized bed gas furnace;
step 3, adding the phenol water ammonia water and the binder raw materials into a binder mixing kettle together for mixing and stirring to obtain a binder mixture;
step 4, dehydrating the adhesive mixture, placing the adhesive mixture into a centrifugal pump for centrifugal dehydration, and obtaining a dehydrated adhesive mixture when the surface of the adhesive mixture is free of free water through centrifugation;
step 6, taking out raw coal from a raw coal storage tank, metering the raw coal by a third metering belt, and then sending the raw coal and the furnace ash mixture to a two-stage double-shaft stirring mixer together for stirring and mixing to obtain a raw coal furnace ash mixture;
step 7, conveying the raw coal furnace ash mixture to a roller type extruder for processing to obtain a solid;
and 8, drying the obtained solid in a dryer to obtain the usable raw coal furnace ash solid.
The present invention is also characterized in that,
and (3) cooling the high-temperature furnace ash in the step (2) to 50 ℃ after passing through a vertical plate cooler.
And 3, stirring the phenol water ammonia water and the binder for 2-3 hours.
And 5, stirring for 3-4 hours by using a primary coulter type stirring mixer.
And 6, stirring and mixing for 2-3 hours by using a two-stage double-shaft stirring mixer.
And 7, enabling the raw coal ash mixture to pass through the double-roller extruder to generate solid in a sheet shape.
The invention has the beneficial effects that:
(1) the phenol water ammonia water added in the binder mixing kettle is corresponding wastewater, and the wastewater is recycled.
(2) The technical scheme of this application can be with high temperature furnace ash rapid cooling.
(3) The final finished product of the technical scheme of the application is flaky, and the finished product can better return to the circulating fluidized bed gas furnace to participate in combustion.
(4) The technical scheme of this application adopts the stirring mixer, can be with more even of raw coal and ashes mixture.
(5) According to the technical scheme, the equipment selected in each process can continuously operate and can be automatically controlled.
Drawings
FIG. 1 is a schematic view showing the connection relationship of a high-temperature ash recycling apparatus according to the present invention.
FIG. 2 is a schematic structural view of a vertical plate cooler of the high-temperature ash recycling device of the present invention.
In the figure, 1, a circulating fluidized bed gas furnace, 2, a vertical plate cooler, 3, a first metering belt, 4, a first-stage coulter type stirring mixer, 5, a binder mixing kettle, 6, a centrifugal pump, 7, a second metering belt, 8, a raw coal storage tank, 9, a third metering belt, 10, a second-stage double-shaft stirring mixer, 11, a double-roller type extruder, 12, a drier, 13, a cooling jacket, 14, a shell, 15, a nitrogen inlet and 16, a cooling plate are arranged.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a high-temperature furnace dust recycling device which comprises a circulating fluidized bed gas furnace 1, wherein the circulating fluidized bed gas furnace 1 is sequentially connected with a vertical plate cooler 2, a first metering belt 3, a first-stage coulter type stirring mixer 4, a second-stage double-shaft stirring mixer 10, a double-roll extruder 11 and a dryer 12, the first-stage coulter type stirring mixer 4 is further sequentially connected with a second metering belt 7, a centrifugal pump 6 and a binder mixing kettle 5, and the second-stage double-shaft stirring mixer 10 is further sequentially connected with a third metering belt 9 and a raw coal storage tank 8.
As shown in fig. 2, a cooling jacket 13 is disposed on a surface of a housing 14 of the vertical plate cooler 2, the cooling jacket 13 can accelerate cooling, a nitrogen inlet 15 is further disposed on the housing 14, a plurality of cooling plates 16 are disposed inside the vertical plate cooler 2, the cooling plates 16 are perpendicular to an inner bottom surface of the vertical plate cooler 2, and the cooling plates 16 are parallel to each other and are uniformly distributed.
A method for recycling high-temperature furnace ash comprises the following steps:
step 1, taking out high-temperature furnace dust from a circulating fluidized bed gas furnace 1,
step 3, adding the phenol water ammonia water and the binder raw materials into a binder mixing kettle 5 together, and mixing and stirring for 2-3 hours to obtain a binder mixture;
step 4, placing the adhesive mixture into a centrifugal pump 6 for centrifugal dehydration, and obtaining a dehydrated adhesive mixture when the surface of the adhesive mixture is free of free water through centrifugation;
step 6, taking out raw coal from a raw coal storage tank 8, metering the raw coal by a third metering belt 9, and then sending the raw coal and the furnace ash mixture to a two-stage double-shaft stirring mixer 10 to stir and mix for 2-3 hours to obtain a raw coal furnace ash mixture;
step 7, conveying the raw coal furnace ash mixture to a roller type extruder 11 for processing to obtain a flaky solid with the thickness of 4-6 mm;
according to the high-temperature furnace ash recycling device, according to the different properties of the mixed materials during stirring, the first-stage stirring mixer adopts a coulter type mixer, so that the furnace ash and the adhesive can be better combined together; the two-stage stirring mixer adopts a double-shaft mixer, so that raw coal and furnace dust can be mixed more uniformly. In order to ensure the accurate measurement of the raw materials, each raw material is independently provided with a respective measuring belt scale, so that the proportioning requirement of the product is ensured.
The method for recycling the high-temperature furnace dust can treat the high-temperature furnace dust into solid coal for recycling, and the production device continuously and automatically operates, so that the danger of the gas furnace after long-time use is reduced. The scheme adopts the adhesive to fully adsorb the furnace dust, thereby improving the recovery utilization rate of the furnace dust; and after the adhesive and the furnace dust are mixed and stirred, the furnace dust becomes hydrophilic, no raise dust occurs, and the problem of environmental protection is solved.
The carbon content in the furnace ash after the combustion of the existing circulating fluidized bed is about 5% -7% which is 2-4 times of the carbon content of the furnace slag after the combustion of the fluidized bed, and the furnace ash and raw coal are put into the circulating fluidized bed for combustion again after the recovery by the technical scheme of the application, and because the furnace ash and the flaky raw coal furnace ash solid prepared from the raw coal are easy to be fully combusted, the carbon content of the furnace slag is reduced by 30% -70%, and the using amount of the raw coal is comprehensively reduced by 4% -6%.
Claims (8)
1. The utility model provides a high temperature ashes recycle device, its characterized in that, including circulating fluidized bed gas furnace (1), circulating fluidized bed gas furnace (1) has connected gradually vertical plate cooler (2), first measurement belt (3), one-level coulter formula stirring and mixing machine (4), second grade biax stirring and mixing machine (10), to roll-type extruder (11), desiccator (12), one-level coulter formula stirring and mixing machine (4) still has connected gradually second measurement belt (7), centrifugal pump (6), binder mixing kettle (5), second grade biax stirring and mixing machine (10) still has connected gradually third measurement belt (9), raw coal storage tank (8).
2. The high-temperature furnace ash recycling device according to claim 1, characterized in that a cooling jacket (13) is arranged outside the shell of the vertical plate cooler (2), and the cooling jacket (13) is tiled and fixedly connected outside the shell of the vertical plate cooler (2).
3. A recycling method of high-temperature furnace dust of a circulating fluidized bed gas furnace, which uses the high-temperature furnace dust recycling device of claim 1, is characterized by comprising the following steps:
step 1, taking out high-temperature furnace dust from a circulating fluidized bed gas furnace (1);
step 2, introducing nitrogen into the vertical plate cooler (2) through a nitrogen inlet (15), adding high-temperature furnace dust after the vertical plate cooler (2) is filled with the nitrogen, and cooling the high-temperature furnace dust;
step 3, adding the phenol water ammonia water and the binder raw materials into a binder mixing kettle (5) together for mixing and stirring to obtain a binder mixture;
step 4, dehydrating the adhesive mixture, placing the adhesive mixture into a centrifugal pump (6) for centrifugal dehydration, and obtaining a dehydrated adhesive mixture when the surface of the adhesive mixture is free of free water through centrifugation;
step 5, metering the cooled high-temperature furnace dust through a first metering belt (3), conveying the high-temperature furnace dust to a primary coulter type stirring mixer (4), metering the dehydrated binder mixture through a second metering belt (7), conveying the dehydrated binder mixture to the primary coulter type stirring mixer (4), and mixing and stirring the cooled high-temperature furnace dust and the formed binder mixture in the primary coulter type stirring mixer (4);
step 6, taking out raw coal from a raw coal storage tank (8), metering the raw coal by a third metering belt (9), and then sending the raw coal and the furnace ash mixture to a two-stage double-shaft stirring mixer (10) to be stirred and mixed to obtain a raw coal furnace ash mixture;
step 7, conveying the raw coal furnace ash mixture to a double-roll extruder (11) for treatment to obtain a solid;
and 8, putting the obtained solid into a dryer (12) for drying to obtain the usable raw coal furnace ash solid.
4. The method of claim 3, wherein the circulating fluidized bed high temperature ash in step 2 is cooled to 50 ℃ after passing through the vertical plate cooler.
5. The method for recycling high-temperature furnace dust according to claim 3, wherein the aqueous ammonia of phenol water and the binder are stirred for 2-3 hours in the step 3.
6. The method for recycling high-temperature furnace dust according to claim 3, wherein the primary coulter type stirring mixer (4) in the step 5 is stirred for 3-4 hours.
7. The method for recycling high-temperature furnace dust according to claim 3, wherein the two-stage double-shaft stirring mixer (10) in the step 6 is used for stirring and mixing for 2-3 hours.
8. A high temperature ash recycling method in accordance with claim 3, wherein the solid generated after the raw coal ash mixture in step 7 passes through the pair-roll extruder (11) is in a sheet form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110342228.9A CN112980538A (en) | 2021-03-30 | 2021-03-30 | High-temperature furnace ash recycling method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110342228.9A CN112980538A (en) | 2021-03-30 | 2021-03-30 | High-temperature furnace ash recycling method and device |
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| Publication Number | Publication Date |
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| CN112980538A true CN112980538A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110342228.9A Pending CN112980538A (en) | 2021-03-30 | 2021-03-30 | High-temperature furnace ash recycling method and device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0446996A (en) * | 1990-06-14 | 1992-02-17 | Mitsubishi Heavy Ind Ltd | Preparation of coal-water slurry |
| CN1190667A (en) * | 1998-03-18 | 1998-08-19 | 山西大学 | Fully fly-ash industrial briquet coal and making method thereof |
| KR20010002349A (en) * | 1999-06-10 | 2001-01-15 | 반봉찬 | A substitute for fine coal in copper smelting by CDQ dust |
| CN1397630A (en) * | 2002-08-13 | 2003-02-19 | 湖北省谷城县化肥厂 | Process for preparing sodium humate-coal bars |
| CN103881782A (en) * | 2014-04-09 | 2014-06-25 | 河南理工大学 | Fluidized-bed gasifier fly ash granules and production method thereof |
| CN208292931U (en) * | 2018-05-25 | 2018-12-28 | 杨建民 | A kind of high-temperature coke upright radiator |
-
2021
- 2021-03-30 CN CN202110342228.9A patent/CN112980538A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0446996A (en) * | 1990-06-14 | 1992-02-17 | Mitsubishi Heavy Ind Ltd | Preparation of coal-water slurry |
| CN1190667A (en) * | 1998-03-18 | 1998-08-19 | 山西大学 | Fully fly-ash industrial briquet coal and making method thereof |
| KR20010002349A (en) * | 1999-06-10 | 2001-01-15 | 반봉찬 | A substitute for fine coal in copper smelting by CDQ dust |
| CN1397630A (en) * | 2002-08-13 | 2003-02-19 | 湖北省谷城县化肥厂 | Process for preparing sodium humate-coal bars |
| CN103881782A (en) * | 2014-04-09 | 2014-06-25 | 河南理工大学 | Fluidized-bed gasifier fly ash granules and production method thereof |
| CN208292931U (en) * | 2018-05-25 | 2018-12-28 | 杨建民 | A kind of high-temperature coke upright radiator |
Non-Patent Citations (2)
| Title |
|---|
| 方希修等: "《配合饲料加工工艺与设备》", 31 May 2015 * |
| 胡长顺等: "《高等级公路路基路面施工技术》", 31 October 1994 * |
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Application publication date: 20210618 |
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