CN112792106A - Comprehensive utilization process for municipal solid waste incineration slag - Google Patents
Comprehensive utilization process for municipal solid waste incineration slag Download PDFInfo
- Publication number
- CN112792106A CN112792106A CN202110131036.3A CN202110131036A CN112792106A CN 112792106 A CN112792106 A CN 112792106A CN 202110131036 A CN202110131036 A CN 202110131036A CN 112792106 A CN112792106 A CN 112792106A
- Authority
- CN
- China
- Prior art keywords
- slag
- screening
- shaking table
- primary
- namely
- 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.)
- Withdrawn
Links
- 239000002893 slag Substances 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 22
- 238000004056 waste incineration Methods 0.000 title claims abstract description 9
- 238000012216 screening Methods 0.000 claims abstract description 41
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 29
- 150000002739 metals Chemical class 0.000 claims abstract description 16
- 239000002699 waste material Substances 0.000 claims abstract description 16
- 238000007885 magnetic separation Methods 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 239000006148 magnetic separator Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 11
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 8
- 241001584775 Tunga penetrans Species 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 210000003128 head Anatomy 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 238000010409 ironing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/10—Destroying solid waste or transforming solid waste into something useful or harmless involving an adsorption step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/80—Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of garbage treatment systems, in particular to a comprehensive utilization process of municipal solid waste incineration slag, which realizes the recovery of metal substances in the slag through the production processes of primary screening, manual screening, primary magnetic separation, primary crushing, secondary magnetic separation, jigging separation, roller screening and table screening, utilizes a wet recovery mode to screen and recover magnetic metals and nonferrous metals in the slag, has reasonable and efficient process design, can recover valuable metals in the slag to the maximum extent, and solves the problem of resource waste in the past.
Description
Technical Field
The invention relates to the technical field of garbage disposal systems, in particular to a comprehensive utilization process of municipal solid waste incinerator slag.
Background
In the urban domestic garbage incineration power generation, slag is a byproduct of domestic garbage incineration and comprises incineration residues left on a grate and particles falling from the space between the grates. The slag is composed of slag, bricks, glass, ceramics, stones, metals, organic matters and the like, and if the slag generated by the incineration power plant is treated as general solid waste in a landfill, the requirement on the landfill capacity is increased, and certain pollution is caused to the environment and soil.
Therefore, a comprehensive utilization process of the municipal solid waste incineration slag is urgently needed, metal substances can be effectively separated from the slag, and soil pollution is prevented.
Disclosure of Invention
The invention aims to provide a comprehensive utilization process of municipal solid waste incineration slag, aiming at the defects in the prior art.
The purpose of the invention is realized by the following technical scheme: the application provides a comprehensive utilization process of municipal solid waste incineration slag, which comprises the following steps: step a, primary screening, namely placing the raw slag material into a primary screening machine for coarse screening so as to obtain incineration waste on the primary screening machine and slag A under the primary screening machine; step b, manually screening, namely conveying the slag A in the step a to a belt conveyor, and observing the slag A by a worker through naked eyes to remove nonferrous metals with larger particle sizes; c, performing primary magnetic separation, namely conveying the slag A in the step B to a cross-belt magnetic separator, performing waste iron removal treatment on the slag A by the cross-belt magnetic separator, and absorbing waste iron in the slag A by the cross-belt magnetic separator to obtain slag B; d, primary crushing, namely conveying the slag B in the step C to a first hammer crusher, and then adding water for crushing to obtain slag C; e, performing secondary magnetic separation, namely putting the slag C obtained in the step D into a first roller magnetic separator for secondary iron scrap removal to obtain slag D; step f, jigging and sorting, namely putting the furnace slag D in the step e into a jigger for sorting to obtain a light mixture and a heavy mixture; step g, screening by a roller, namely putting the light mixture obtained in the step f into the roller screen for screening to separate incineration waste, then conveying the light mixture discharged from the roller screen into a first shaking table, then adding water into the first shaking table, separating out nonferrous metals and tailings by the first shaking table, and storing the tailings in a first settling pond; step h, secondary crushing, namely conveying the heavy mixture in the step f to a second hammer crusher for crushing to obtain slag E; and step i, screening by a shaking table, namely conveying the slag E in the step h to a second shaking table, sorting out nonferrous metals and tailings by the second shaking table, and storing the tailings in a second settling tank.
In the step a, the primary screening machine is provided with a grid, and the size of a through hole of the grid is 50 mm.
Wherein in step d, the grain size of the slag C is less than 10 mm.
Wherein, in the step h, the grain diameter of the slag E is less than 4 mm.
The invention has the beneficial effects that: the comprehensive utilization process of the municipal solid waste incinerator slag utilizes a wet recovery mode to screen and recover magnetic metals and nonferrous metals in the slag, has reasonable and efficient process design, can recover valuable metals in the slag to the maximum extent, and solves the problem of resource waste in the past.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic flow chart of the comprehensive utilization process of the municipal solid waste incineration slag in the embodiment.
Description of the drawings: one-level screening machine 1, belt feeder 2, stride and take magnet separator 3, first hammer crusher 4, first cylinder magnet separator 5, jigging machine 6, drum sieve 7, first shaking table 8, first sedimentation tank 9, second hammer crusher 10, second cylinder magnet separator 11, second shaking table 12, second sedimentation tank 13.
Detailed Description
The invention is further described with reference to the following examples.
According to a specific embodiment of the comprehensive utilization process of municipal solid waste incinerator slag, as shown in fig. 1, the comprehensive utilization system of municipal solid waste incinerator slag comprises a primary screening machine 1, a belt machine 2 connected with the primary screening machine 1, a cross-belt magnetic separator 3 connected with the belt machine 2, a first hammer crusher 4 connected with the cross-belt magnetic separator 3, a first roller magnetic separator 5 connected with the first hammer crusher 4, and a jigger 6 connected with the first roller magnetic separator 5, wherein the jigger 6 is respectively communicated with a roller screen 7 and a second hammer crusher 10, the roller screen 7 is connected with a first shaking table 8, and the first shaking table 8 is connected with a first sedimentation tank 9; the second hammer crusher 10 is connected with a second roller magnetic separator 11, the second roller magnetic separator 11 is connected with a second shaking table 12, and the second shaking table 12 is connected with a second sedimentation tank 13.
The comprehensive utilization process of the municipal solid waste incineration slag comprises the following steps.
Step a, primary screening, namely placing the raw slag material into a primary screening machine 1 for coarse screening so as to obtain the incineration waste positioned at the upper end of a screen of the primary screening machine 1 and the slag A positioned at the lower end of the screen of the primary screening machine 1. One-level screening machine 1 is vibrating flat screen extension, and one-level screening machine 1 is provided with the grid, and the via hole size of grid is 50mm, and one-level screening machine 1 can separate out the rubbish of not burning completely in the slag to avoided slag impurity too much and increased the degree of difficulty to retrieving.
And b, manually screening, namely conveying the slag A in the step a to a belt conveyor 2, and observing the slag A by naked eyes of workers to remove the nonferrous metals with larger particle sizes. Because a certain number of large metal blocks possibly exist in the slag, the large metal blocks can be collected by utilizing a manual screening mode, so that the workload of subsequent crushing is reduced, the working efficiency of crushing is improved, and the fluency of the whole process is improved.
And c, performing primary magnetic separation, namely conveying the slag A in the step B to a cross-belt magnetic separator 3, performing waste iron removal treatment on the slag A by the cross-belt magnetic separator 3, and absorbing waste iron in the slag A by the cross-belt magnetic separator 3 to obtain slag B. Stride and take magnet separator 3 to include the conveyer belt, prevent slag A on the conveyer belt, put on the conveyer belt and set up the suspension type de-ironing separator, when slag A carried through the suspension type de-ironing separator below, magnetic metal in the slag A was elected by magnetism to carry out the magnetic separation to bold magnetic metal, thereby retrieve the scrap iron in the slag A.
And d, primary crushing, namely conveying the slag B in the step C to a first hammer crusher 4, and then adding water for crushing to obtain slag C. The hammer crusher realizes the crushing of the slag B mainly by the impact of the hammer. The motor drives the rotor to rotate at a high speed, and the hammer head rotating at the high speed impacts, cuts and tears the slag B to cause the slag B to be broken. The furnace slag B is enabled to be rushed to the screen mesh in the cavity from the hammer head rotating at a high speed through the gravity of the furnace slag B, the size of the screen mesh is 10mm, the furnace slag B larger than the size of the screen mesh is stopped on the screen mesh and continuously crushed and ground by the hammer head until the furnace slag B is crushed to the required discharge granularity, and the furnace slag C is obtained by removing the furnace slag B through the screen mesh. It should be noted that the hammer crusher needs to be added with water during operation, and the mixture is flushed by the water.
And e, performing secondary magnetic separation, namely putting the slag C obtained in the step D into a first roller magnetic separator 5 for secondary iron scrap removal to obtain slag D. Because the slag C after the primary crushing is in a scattered state, a drum-type magnetic separator can absorb as much waste iron in the slag C as possible, thereby preparing the slag D. Specifically, a deironing device can be placed on the roller.
And f, jigging and sorting, namely putting the slag D in the step e into a jigger 6 for sorting to obtain a light mixture and a heavy mixture. Specifically, the jig 6 may be a sawtooth jig. According to the theoretical layering rule of a jigging bed layer, a jigging pulsation curve of the sawtooth-shaped jigging machine is in a sawtooth shape, ascending water flow is faster than descending water flow, so that heavy mixture in slag D is fully settled, and metal particles with heavier specific gravity settle to the bottom of a 6 bed layer of the jigging machine along with the descending water flow; the light mixture is distributed on the upper part of the bed layer of the jigger 6 and is conveyed to the drum sieve 7 along with the water flow through the discharge hole of the jigger 6 for further sieving, and the heavy metal can be classified and recovered by utilizing a shaking table or a vortex separation device.
And g, 7, screening by using a drum screen, namely putting the light mixture obtained in the step f into the drum screen 7 for screening, wherein the screening limit of the drum screen 7 is 4mm, and separating the incineration waste. After the flotation separation of the jigger 6, the substances with the size larger than 4mm in the light mixture are sent back to the incinerator again for incineration, the light mixture with the size smaller than 4mm is sent to the first shaking table 8, then water is added into the first shaking table 8, the first shaking table 8 separates out nonferrous metals and tailings, and the tailings are stored in the first settling pond. It should be noted that the table top of the first shaking table 8 continuously performs up-and-down reciprocating vibration, and under the continuous impact action of the water flow, the heavy metal and the slag form different flat cables on the table top in the moving process, so that the slag storage and purification of the metal mixture are realized, and the nonferrous metal and the tailings are sorted out.
And h, secondary crushing, namely conveying the heavy mixture in the step f to a second hammer crusher 10 for crushing to obtain slag E. The hammer crusher mainly realizes the crushing of heavy mixture by the impact of the hammer. The motor drives the rotor to rotate at a high speed, and the heavy mixture is crushed to a particle size of less than 1mm by impacting and shearing the heavy mixture by the hammer rotating at the high speed. The heavy mixture is made to rush from the hammer head rotating at high speed to the screen mesh in the cavity by the gravity of the heavy mixture, the size of the screen mesh is 1mm, the heavy mixture larger than the size of the screen mesh is retained on the screen mesh, and the heavy mixture is continuously crushed and ground by the hammer head until the heavy mixture is crushed to the required discharge granularity and then discharged by the screen mesh to obtain the slag E. It should be noted that the hammer crusher needs to be added with water during operation, and the mixture is flushed by the water.
And step i, screening by a shaking table, namely conveying the slag E in the step h to a second shaking table 12, separating nonferrous metals and tailings by the second shaking table 12, and storing the tailings in a second settling tank. It should be noted that the table top of the second shaking table 12 continuously performs up-and-down reciprocating vibration, and under the continuous impact action of the water flow, the heavy metal and the slag form different cables on the table top in the moving process, so as to realize the slag storage and purification of the metal mixture, and further sort out the nonferrous metal and the tailings.
According to the comprehensive utilization process of the municipal solid waste incinerator slag, the magnetic metal and the nonferrous metal in the slag are screened and recovered by a wet recovery mode, the process design is reasonable and efficient, the metal with useful value in the slag can be recovered to the greatest extent, and the problem of resource waste in the past is solved.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. A comprehensive utilization process of municipal solid waste incineration slag is characterized by comprising the following steps:
step a, primary screening, namely placing the raw slag into a primary screening machine for coarse screening so as to obtain incineration waste on the primary screening machine and slag A below the primary screening machine;
step b, manually screening, namely conveying the slag A in the step a to a belt conveyor, and observing the slag A by a worker through naked eyes to remove nonferrous metals with larger particle sizes;
c, performing primary magnetic separation, namely conveying the slag A in the step B to a cross-belt magnetic separator, performing waste iron removal treatment on the slag A by the cross-belt magnetic separator, and absorbing waste iron in the slag A by the cross-belt magnetic separator to obtain slag B;
d, primary crushing, namely conveying the slag B in the step C to a first hammer crusher, and then adding water for crushing to obtain slag C;
e, performing secondary magnetic separation, namely putting the slag C obtained in the step D into a first roller magnetic separator for secondary iron scrap removal to obtain slag D;
step f, jigging and sorting, namely putting the furnace slag D in the step e into a jigger for sorting to obtain a light mixture and a heavy mixture;
step g, screening by a roller, namely putting the light mixture obtained in the step f into the roller screen for screening to separate incineration waste, then conveying the light mixture discharged from the roller screen into a first shaking table, then adding water into the first shaking table, separating out nonferrous metals and tailings by the first shaking table, and storing the tailings in a first settling pond;
step h, secondary crushing, namely conveying the heavy mixture in the step f to a second hammer crusher for crushing to obtain slag E;
and step i, screening by a shaking table, namely conveying the slag E in the step h to a second shaking table, sorting out nonferrous metals and tailings by the second shaking table, and storing the tailings in a second settling tank.
2. The municipal solid waste incinerator slag comprehensive utilization process according to claim 1, characterized in that: in the step a, the primary screening machine is provided with a grid, and the size of a through hole of the grid is 50 mm.
3. The municipal solid waste incinerator slag comprehensive utilization process according to claim 1, characterized in that: in step d, the particle size of the slag C is less than 10 mm.
4. The municipal solid waste incinerator slag comprehensive utilization process according to claim 1, characterized in that: in step h, the particle size of the slag E is less than 4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110131036.3A CN112792106A (en) | 2021-01-30 | 2021-01-30 | Comprehensive utilization process for municipal solid waste incineration slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110131036.3A CN112792106A (en) | 2021-01-30 | 2021-01-30 | Comprehensive utilization process for municipal solid waste incineration slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112792106A true CN112792106A (en) | 2021-05-14 |
Family
ID=75813108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110131036.3A Withdrawn CN112792106A (en) | 2021-01-30 | 2021-01-30 | Comprehensive utilization process for municipal solid waste incineration slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112792106A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857206A (en) * | 2021-09-17 | 2021-12-31 | 中国恩菲工程技术有限公司 | Treatment method and system for household garbage incineration slag |
| CN114273386A (en) * | 2021-12-22 | 2022-04-05 | 中国十七冶集团有限公司 | Slag notch waste residue integration is wet processing equipment system futilely |
| CN115228888A (en) * | 2022-07-26 | 2022-10-25 | 福州美佳环保资源开发有限公司 | Comprehensive utilization intelligent platform for slag of household garbage incineration power plant |
-
2021
- 2021-01-30 CN CN202110131036.3A patent/CN112792106A/en not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| 黄炳辉: "生活垃圾焚烧炉渣分选处理工艺研究", 《绿色科技》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857206A (en) * | 2021-09-17 | 2021-12-31 | 中国恩菲工程技术有限公司 | Treatment method and system for household garbage incineration slag |
| CN113857206B (en) * | 2021-09-17 | 2022-12-23 | 中国恩菲工程技术有限公司 | Treatment method and system for household garbage incineration slag |
| CN114273386A (en) * | 2021-12-22 | 2022-04-05 | 中国十七冶集团有限公司 | Slag notch waste residue integration is wet processing equipment system futilely |
| CN115228888A (en) * | 2022-07-26 | 2022-10-25 | 福州美佳环保资源开发有限公司 | Comprehensive utilization intelligent platform for slag of household garbage incineration power plant |
| CN115228888B (en) * | 2022-07-26 | 2024-04-19 | 福州美佳环保资源开发有限公司 | Intelligent platform for comprehensive utilization of slag of household garbage incineration power plant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112792106A (en) | Comprehensive utilization process for municipal solid waste incineration slag | |
| CN110813483A (en) | Construction waste crushing and sorting treatment system | |
| CN110420970B (en) | Household garbage incineration power generation slag wet-process resource utilization system | |
| CN209005920U (en) | A kind of cracking and sorting processing system of building waste | |
| CN102284350B (en) | Sorting and separation process for utilizing slag comprehensively | |
| CN108176697A (en) | Build composting sorting total system and processing method | |
| CN201442005U (en) | Construction waste comprehensive treatment equipment | |
| CN105195313A (en) | Method for recycling metal and combustibles from domestic waste incineration slag | |
| CN105921484A (en) | Comprehensive utilization method of furnace slag in household garbage incineration power plant | |
| CN107282253A (en) | Treating construction waste method | |
| CN105127176A (en) | Building-rubbish resource treatment and use integrated treating method and treating system thereof | |
| CN107597383A (en) | A kind of building waste processing equipment | |
| KR19990066128A (en) | Intermediate treatment method and apparatus for construction waste treatment and recycling | |
| KR20110049344A (en) | Sorter for scrap iron | |
| CN111346732A (en) | Novel household garbage incinerator slag sorting process | |
| CN1239276C (en) | Process for producing life garbage incinerator slag aggregate | |
| CN101927258A (en) | Mobile construction waste treatment device | |
| CN201423382Y (en) | Movable construction waste treatment device | |
| KR100358687B1 (en) | The constructive recycling methods and instruments of Reclaimed waste. | |
| KR100358899B1 (en) | Aggregating Equipment of Used Concrete | |
| CN202516839U (en) | Furnace slag treatment device | |
| CN116889969A (en) | Household garbage slag sorting process | |
| CN113751163A (en) | Waste water mud piece solid refuse treatment system for building | |
| CN112156876A (en) | Method for improving recovery rate of nonferrous metals in household garbage incinerator slag | |
| CN212549957U (en) | Waste water mud piece solid refuse treatment system for building |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210514 |
|
| WW01 | Invention patent application withdrawn after publication |