CN107297381B - Biogas residue processing device for improving non-point source pollution - Google Patents
Biogas residue processing device for improving non-point source pollution Download PDFInfo
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- CN107297381B CN107297381B CN201710673818.3A CN201710673818A CN107297381B CN 107297381 B CN107297381 B CN 107297381B CN 201710673818 A CN201710673818 A CN 201710673818A CN 107297381 B CN107297381 B CN 107297381B
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- point source
- centrifugal
- processing device
- source pollution
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- 238000000926 separation method Methods 0.000 claims abstract description 43
- 230000005540 biological transmission Effects 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 238000000151 deposition Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 8
- 239000013049 sediment Substances 0.000 claims 1
- 238000003825 pressing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/02—Gases or liquids enclosed in discarded articles, e.g. aerosol cans or cooling systems of refrigerators
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention relates to the technical field of biogas residue processing, in particular to a biogas residue processing device for improving non-point source pollution, which comprises a separation bin, wherein a feed hopper is arranged on one side of the top of the separation bin, a rotating bracket is arranged in the separation bin, a non-capping cylindrical centrifugal cylinder is rotatably arranged on the rotating bracket, the lower end of the feed hopper is positioned above the centrifugal cylinder, and a filter cylinder is arranged in the centrifugal cylinder.
Description
Technical Field
The invention relates to the technical field of biogas residue processing, in particular to a biogas residue processing device for improving non-point source pollution.
Background
The biogas residue contains abundant nitrogen, phosphorus, potassium and a large amount of elements, and also contains trace elements such as boron, copper, iron, manganese, zinc and the like which play an important role in the growth of crops. When the biogas residues are processed, solid-liquid separation is generally carried out on the biogas residues, residues are often accumulated in a separation bin in the process, the separation bin is very inconvenient to clean, and on the other hand, heavy metals contained in the biogas residues pollute soil and influence sustainable development.
Disclosure of Invention
The invention aims to solve the defects of difficult cleaning and easy pollution in the prior art, and provides a biogas residue processing device for improving non-point source pollution.
In order to achieve the purpose, the invention adopts the following technical scheme:
the designed biogas residue processing device for improving the non-point source pollution comprises a separation bin, wherein a feed hopper is arranged on one side of the top of the separation bin, a rotating support is arranged in the separation bin, a cylindrical centrifugal cylinder which is not capped is rotatably arranged on the rotating support, the lower end of the feed hopper is positioned above the centrifugal cylinder, a filter cylinder is arranged in the centrifugal cylinder, small holes are uniformly distributed in the centrifugal cylinder, a centrifugal motor is arranged in the separation bin, the centrifugal motor is connected with the centrifugal cylinder through a transmission mechanism, and the bottom of the separation bin is connected with at least one liquid discharge pipe;
a pressurizing piston matched with the section of the centrifugal cylinder is arranged in the centrifugal cylinder in a sliding mode, a pressurizing hydraulic cylinder is vertically arranged at the top of the separation bin, the pressurizing piston is connected with the bottom end of the pressurizing hydraulic cylinder, a plurality of pressing rods are connected onto the pressurizing piston, one end of each pressing rod is hinged to the pressurizing piston and is close to the circle center of the pressurizing piston, the pressing rods are uniformly distributed along the circumferential direction of the pressurizing piston, the other end of each pressing rod is connected with a cleaning brush plate, and a tension spring is connected between the other end, close to the pressing rod, of each pressing rod and the pressurizing piston;
an alkali liquor chamber is arranged on the outer side of the separation bin, a conveying pump is arranged in the alkali liquor chamber, a spray head is arranged in the feed hopper, and the spray head is connected with the conveying pump through a conveying pipe;
the bottom of separation storehouse is equipped with the discharge gate, be equipped with ejection of compact control mechanism in the discharge gate, the separation storehouse outside is connected with through coupling mechanism and deposits the storehouse.
Preferably, drive mechanism is including accelerating the machine, drive gear and transmission ring gear, the input shaft of accelerating the machine and the output shaft of centrifugal motor, drive gear and the coaxial and fixed connection of the output shaft of accelerating the machine, transmission ring gear and the coaxial and fixed connection of centrifuging tube, transmission ring gear and drive gear meshing.
Preferably, a control valve is arranged on the liquid discharge pipe, and the control valve is a one-way normally closed electromagnetic valve.
Preferably, coupling mechanism includes the lifting machine, the feed inlet of lifting machine is located the discharge gate below, the external connection of separation storehouse has the frame, be equipped with in the frame and deposit the storehouse, one side of depositing the storehouse is equipped with and connects the hopper, the discharge gate of lifting machine is located and connects the hopper top, the bottom of depositing the storehouse is equipped with screw conveyer.
Preferably, a material receiving vehicle is arranged below the discharge end of the spiral conveyor.
Preferably, the discharge control mechanism comprises a discharge control hydraulic cylinder vertically arranged in a discharge port, the upper end of the discharge control hydraulic cylinder is rotatably connected with a circular plug plate, the bottoms of the centrifugal cylinder and the filter cylinder are both provided with a circular feed port, and the plug plate is coaxial with the feed port and has a diameter larger than that of the feed port.
Preferably, the plug plate is vertically connected with a rotating shaft coaxial with the plug plate, and the rotating shaft is coaxially inserted in the discharge control hydraulic cylinder.
Preferably, the centrifugal cylinder is a stainless steel cylinder.
The biogas residue processing device for improving non-point source pollution provided by the invention has the beneficial effects that: the invention is provided with the alkali liquor chamber, heavy metals are precipitated by conveying alkali liquor, and then centrifugal separation is carried out by matching the centrifugal cylinder with the filter cylinder, so that the separation effect is good, sewage containing heavy metals is separated from biogas residues, the harm of the heavy metals to crops is avoided, the cleaning brush plate is arranged, the inner wall of the centrifugal cylinder can be automatically cleaned, the cleaning effect is good, and the maintenance is simple and convenient.
Drawings
FIG. 1 is a front view of a biogas residue processing device for improving non-point source pollution provided by the invention;
FIG. 2 is a schematic structural diagram of the part A in FIG. 1 of the biogas residue processing device for improving non-point source pollution provided by the invention;
fig. 3 is a schematic structural diagram of a biogas residue processing device for improving non-point source pollution, which is provided by the invention and is shown at the position B in fig. 1;
fig. 4 is a top view of a separation bin of the biogas residue processing device for improving non-point source pollution.
In the figure: the device comprises a separation bin 1, a driving gear 2, a transmission gear ring 3, a rotating support 4, a material receiving hopper 5, a precipitation bin 6, a screw conveyor 7, a material receiving vehicle 8, a rack 9, a lifter 10, a control valve 11, a discharge port 12, a liquid discharge pipe 13, a centrifugal cylinder 14, a pressurizing piston 15, a conveying pump 16, an alkali liquor chamber 17, a conveying pipe 18, a spray head 19, a feed hopper 20, a pressurizing hydraulic cylinder 21, a centrifugal motor 22, an accelerator 23, a tension spring 24, a cleaning brush plate 25, a pressure rod 26, a discharge port 27, a plug plate 28, a discharge control hydraulic cylinder 29 and a filter cylinder 30.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, a biogas residue processing device for improving non-point source pollution comprises a separation bin 1, a feed hopper 20 is arranged on one side of the top of the separation bin 1, a rotating bracket 4 is arranged in the separation bin 1, a cylindrical centrifugal cylinder 14 which is not capped is rotatably arranged on the rotating bracket 4, and the centrifugal cylinder 14 is a stainless steel cylinder. The lower end of the feed hopper 20 is positioned above the centrifugal cylinder 14, a filter cylinder 30 is arranged inside the centrifugal cylinder 14, small holes are uniformly distributed on the centrifugal cylinder 14, a centrifugal motor 22 is arranged in the separation bin 1, and the centrifugal motor 22 is connected with the centrifugal cylinder 14 through a transmission mechanism. The feed hopper 20 feeds materials to the centrifugal cylinder 14, the filter cylinder 30 is used for filtering biogas residues, solid-liquid separation is convenient to carry out, and the separated biogas slurry flows out from the small holes.
The transmission mechanism comprises an accelerator 23, a driving gear 2 and a transmission gear ring 3, an input shaft of the accelerator 23 is connected with an output shaft of the centrifugal motor 22, the driving gear 2 is coaxial and fixedly connected with the output shaft of the accelerator 23, the transmission gear ring 3 is coaxial and fixedly connected with the centrifugal cylinder 14, and the transmission gear ring 3 is meshed with the driving gear 2. The centrifugal motor 22 drives the centrifugal cylinder 14 to rotate, so that centrifugal dehydration is realized.
The bottom of the separation bin 1 is connected with at least one liquid discharge pipe 13, the liquid discharge pipe 13 is provided with a control valve 11, and the control valve 11 is a single-way normally closed electromagnetic valve. The centrifugal cylinder 14 is internally provided with a pressurizing piston 15 with a matched cross section in a sliding manner, the top of the separation bin 1 is vertically provided with a pressurizing hydraulic cylinder 21, the pressurizing piston 15 is connected with the bottom end of the pressurizing hydraulic cylinder 21, the pressurizing piston 15 is connected with a plurality of pressure rods 26, one end of each pressure rod 26 is hinged to the pressurizing piston 15 and is close to the circle center of the pressurizing piston, the pressure rods 26 are uniformly distributed along the circumferential direction of the pressurizing piston 15, the other end of each pressure rod 26 is connected with a cleaning brush plate 25, and a tension spring 24 is connected between the other end of each pressure rod 26 and the pressurizing piston 15. Pressurization pneumatic cylinder 21 drive pressurization piston 15 moves down, increases the separation effect, and the natural pond liquid accumulation after the separation is in separation storehouse 1 bottom, then discharges through fluid-discharge tube 13, and pressurization piston 15 is at the in-process that removes simultaneously, and the cleaning brush board 25 of installing on it can effectively be cleared up centrifuge bowl 14 inner wall, conveniently cleans and maintains, and under tension spring 24's effect, cleaning brush board 25 can compress tightly on centrifuge bowl 14 inner wall, increases clean effect moreover.
An alkali liquor chamber 17 is arranged on the outer side of the separation bin 1, a delivery pump 16 is arranged in the alkali liquor chamber 17, a spray head 19 is arranged in the feed hopper 20, and the spray head 19 is connected with the delivery pump 16 through a delivery pipe 18. The lye chamber 17 is used for storing lye, and the lye enters the centrifuge tube 14 to be mixed with the biogas residues through the conveying of the conveying pump 16 and the conveying pipe 18, so that the lye is combined with heavy metals in the biogas residues to generate precipitates which are difficult to dissolve in water, and the precipitates are convenient to separate from sewage.
The bottom of the separation bin 1 is provided with a discharge port 12, a discharge control mechanism is arranged in the discharge port 12, the discharge control mechanism comprises a discharge control hydraulic cylinder 29 vertically arranged in the discharge port 12, the upper end of the discharge control hydraulic cylinder 29 is rotatably connected with a circular plug plate 28, the plug plate 28 is vertically connected with a rotating shaft coaxial with the plug plate, and the rotating shaft is coaxially inserted on the discharge control hydraulic cylinder 29. The centrifugal cylinder 14 and the filter cylinder 30 are provided with a circular feed opening 27 at the bottom, and the plug plate 28 is coaxial with the feed opening 27 and has a diameter larger than that of the feed opening 27. The discharge control hydraulic cylinder 29 extends to push the plug plate 28 against the discharge hole 12 so as to prevent the biogas residues from falling, and the discharge control hydraulic cylinder 29 shortens to enable the plug plate 28 to be separated from the discharge hole 12 so as to enable the biogas residues to freely fall.
The exterior of the separation bin 1 is connected with a precipitation bin 6 through a connecting mechanism. Coupling mechanism includes lifting machine 10, and the feed inlet of lifting machine 10 is located discharge gate 12 below, and the external connection of separation storehouse 1 has frame 9, is equipped with in the frame 9 and deposits storehouse 6, and one side of depositing storehouse 6 is equipped with and connects hopper 5, and the discharge gate of lifting machine 10 is located and connects hopper 5 top, and the bottom of depositing storehouse 6 is equipped with screw conveyer 7. A material receiving vehicle 8 is arranged below the discharge end of the screw conveyor 7. The biogas residues are dewatered and separated, then conveyed into a precipitation bin 6 by a lifter 10 for precipitation, then conveyed by a screw conveyor 7, and received and conveyed by a material receiving vehicle 8.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides a improve natural pond sediment processingequipment of non-point source pollution, includes separating bin (1), its characterized in that: a feed hopper (20) is arranged on one side of the top of the separation bin (1), a rotating support (4) is arranged in the separation bin (1), a cylindrical centrifugal cylinder (14) which is not capped is rotatably mounted on the rotating support (4), the lower end of the feed hopper (20) is positioned above the centrifugal cylinder (14), a filter cylinder (30) is arranged in the centrifugal cylinder (14), small holes are uniformly distributed in the centrifugal cylinder (14), a centrifugal motor (22) is arranged in the separation bin (1), the centrifugal motor (22) is connected with the centrifugal cylinder (14) through a transmission mechanism, and at least one liquid discharge pipe (13) is connected to the bottom of the separation bin (1);
a pressurizing piston (15) with a matched cross section is arranged in the centrifugal cylinder (14) in a sliding mode, a pressurizing hydraulic cylinder (21) is vertically arranged at the top of the separation bin (1), the pressurizing piston (15) is connected with the bottom end of the pressurizing hydraulic cylinder (21), a plurality of pressure rods (26) are connected to the pressurizing piston (15), one end of each pressure rod (26) is hinged to the pressurizing piston (15) and is close to the circle center of the pressurizing piston, the pressure rods (26) are uniformly distributed along the circumferential direction of the pressurizing piston (15), the other end of each pressure rod (26) is connected with a cleaning brush plate (25), and a tension spring (24) is connected between the other end of each pressure rod (26) close to the pressurizing piston (15);
an alkali liquor chamber (17) is arranged on the outer side of the separation bin (1), a delivery pump (16) is arranged in the alkali liquor chamber (17), a spray head (19) is arranged in the feed hopper (20), and the spray head (19) is connected with the delivery pump (16) through a delivery pipe (18);
the bottom of separation storehouse (1) is equipped with discharge gate (12), be equipped with ejection of compact control mechanism in discharge gate (12), separation storehouse (1) outside is connected with through coupling mechanism deposits storehouse (6).
2. The biogas residue processing device for improving non-point source pollution according to claim 1, which is characterized in that: the transmission mechanism comprises an accelerator (23), a driving gear (2) and a transmission gear ring (3), an input shaft of the accelerator (23) is connected with an output shaft of a centrifugal motor (22), the driving gear (2) is coaxially and fixedly connected with an output shaft of the accelerator (23), the transmission gear ring (3) is coaxially and fixedly connected with a centrifugal cylinder (14), and the transmission gear ring (3) is meshed with the driving gear (2).
3. The biogas residue processing device for improving non-point source pollution according to claim 1, which is characterized in that: and a control valve (11) is arranged on the liquid discharge pipe (13), and the control valve (11) is a single-way normally closed electromagnetic valve.
4. The biogas residue processing device for improving non-point source pollution according to claim 1, which is characterized in that: coupling mechanism includes lifting machine (10), the feed inlet of lifting machine (10) is located discharge gate (12) below, the external connection of separation storehouse (1) has frame (9), be equipped with on frame (9) and deposit storehouse (6), the one side of depositing storehouse (6) is equipped with and connects hopper (5), the discharge gate of lifting machine (10) is located and connects hopper (5) top, the bottom of depositing storehouse (6) is equipped with screw conveyer (7).
5. The biogas residue processing device for improving non-point source pollution according to claim 4, characterized in that: a material receiving vehicle (8) is arranged below the discharge end of the spiral conveyor (7).
6. The biogas residue processing device for improving non-point source pollution according to claim 1, which is characterized in that: the discharging control mechanism comprises a discharging control hydraulic cylinder (29) vertically arranged in the discharging port (12), the upper end of the discharging control hydraulic cylinder (29) is rotatably connected with a circular plug plate (28), the bottoms of the centrifugal cylinder (14) and the filter cylinder (30) are both provided with a circular discharging port (27), and the plug plate (28) and the discharging port (27) are coaxial and have a diameter larger than that of the discharging port (27).
7. The biogas residue processing device for improving non-point source pollution according to claim 6, which is characterized in that: the plug plate (28) is vertically connected with a rotating shaft which is coaxial with the plug plate, and the rotating shaft is coaxially inserted in the discharging control hydraulic cylinder (29).
8. The biogas residue processing device for improving non-point source pollution according to claim 1, which is characterized in that: the centrifugal cylinder (14) is a stainless steel cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710673818.3A CN107297381B (en) | 2017-08-09 | 2017-08-09 | Biogas residue processing device for improving non-point source pollution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710673818.3A CN107297381B (en) | 2017-08-09 | 2017-08-09 | Biogas residue processing device for improving non-point source pollution |
Publications (2)
| Publication Number | Publication Date |
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| CN107297381A CN107297381A (en) | 2017-10-27 |
| CN107297381B true CN107297381B (en) | 2022-12-02 |
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| CN201710673818.3A Active CN107297381B (en) | 2017-08-09 | 2017-08-09 | Biogas residue processing device for improving non-point source pollution |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110125144B (en) * | 2019-05-27 | 2021-09-28 | 光大环保能源(沛县)有限公司 | Ash treatment device after environmental garbage power generation |
| CN111215429B (en) * | 2019-11-29 | 2021-02-02 | 广东石油化工学院 | Ecological circulating device for harmless treatment of biogas slurry and biogas residues |
| CN111517322A (en) * | 2020-06-28 | 2020-08-11 | 安徽亚珠金刚石股份有限公司 | Artificial diamond separation and purification method |
| CN112958600B (en) * | 2021-03-19 | 2024-05-24 | 上海农屹科技股份有限公司 | Efficient kitchen waste reduction treatment device |
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2017
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB257422A (en) * | 1925-10-01 | 1926-09-02 | Robert Alexander Sturgeon | Improvements in or relating to centrifugal separating machines |
| GB8912146D0 (en) * | 1988-06-08 | 1989-07-12 | Passat Maschinenbau Gmbh | Dewatering centrifuge |
| CN204262043U (en) * | 2015-01-21 | 2015-04-15 | 青州市圣洁环保设备科技有限公司 | Portable flyash curing stabilizing device |
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| CN107297381A (en) | 2017-10-27 |
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