CN113477392A - Kitchen garbage light and heavy slag flotation separation device - Google Patents
Kitchen garbage light and heavy slag flotation separation device Download PDFInfo
- Publication number
- CN113477392A CN113477392A CN202110684719.1A CN202110684719A CN113477392A CN 113477392 A CN113477392 A CN 113477392A CN 202110684719 A CN202110684719 A CN 202110684719A CN 113477392 A CN113477392 A CN 113477392A
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- China
- Prior art keywords
- cylindrical body
- flotation separation
- light
- heavy
- heavy slag
- 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.)
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- 239000002893 slag Substances 0.000 title claims abstract description 45
- 238000000926 separation method Methods 0.000 title claims abstract description 39
- 238000005188 flotation Methods 0.000 title claims abstract description 29
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 8
- 239000010806 kitchen waste Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000003756 stirring Methods 0.000 claims description 16
- 238000010992 reflux Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 7
- 239000013049 sediment Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 10
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 18
- 238000004537 pulping Methods 0.000 description 7
- 239000002699 waste material Substances 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000009264 composting Methods 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
- B03B5/623—Upward current classifiers
Abstract
The invention discloses a kitchen waste light and heavy slag flotation separation device which comprises a tank body, wherein the tank body comprises a cylindrical body and an extension area arranged in a tangent mode with the cylindrical body, the cylindrical body is communicated with the extension area, and the extension area is arranged in the tangent direction of the cylindrical body; still include rabbling mechanism and backwash pump, during the axis of rotation of rabbling mechanism stretched into the tube-shape body, the one end of backwash pump was passed through the pipeline and is connected with the delivery port in extension district, and the backwash pump other end passes through the pipeline and is connected with the backward flow mouth of tube-shape body bottom. Because the density difference of the light and heavy residues of the kitchen waste is very small, on one hand, the light and heavy residue flotation separation device improves the light and heavy residue flotation separation effect by combining the centrifugal action with the buoyancy provided by the upward water flow; on the other hand, the tank body is prepared into a body and an extension area which is arranged in a tangent mode with the cylindrical body, the effect of flotation separation can be synergistically improved through the cylindrical body and the extension area which are arranged in the tangent mode, and the light objects are thrown out along the tangent line, so that the separation efficiency and the discharging uniformity can be further improved; the device can realize flotation separation of light and heavy residues in the kitchen garbage, and the separation is complete.
Description
Technical Field
The invention relates to a kitchen garbage light and heavy slag flotation separation device.
Background
The disposal of kitchen waste (kitchen waste mainly aims at restaurant waste with high oil content, kitchen waste mainly is waste classified from household waste of residents, and the kitchen waste has low oil content, and the two types of waste have different sources) becomes a general concern worldwide, and is a very difficult comprehensive and systematic project. At present, the main treatment methods of kitchen waste include a landfill method, a composting method, a heat treatment method and a pulping anaerobic fermentation method. The landfill method needs to occupy a large amount of land resources for a long time and is easy to cause secondary pollution; the composting method has long period and unstable quality, and easily causes soil hardening and underground water pollution; the heat treatment process can be further divided into: incineration, pyrolysis and gasification processes have been gradually eliminated; the pulping anaerobic fermentation method is the current mainstream disposal process, and because the density difference of light and heavy substances of the kitchen waste is very small, a device for separating light and heavy residues of the kitchen waste capable of ensuring the separation effect is absent at present (the standard of good separation effect is that the proportion of heavy components in the residue removal discharge is less than or equal to 1%), but the conditions of abrasion, blockage and the like of the device in the subsequent pulping process can be caused due to poor separation effect of the light and heavy residues in the kitchen waste, and the density difference of the light and heavy substances is very small, so the flotation separation effect is very difficult to ensure.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a kitchen waste light and heavy slag flotation separation device, aiming at the problem that the whole system is easy to break down due to incomplete separation of light and heavy slag in the process of pulping kitchen waste in the prior art.
The technical scheme is as follows: the kitchen waste light and heavy slag flotation separation device comprises a tank body, wherein the tank body comprises a cylindrical body and an extension area which is arranged in a tangent mode with the cylindrical body, the cylindrical body is communicated with the extension area, and the extension area is arranged in the tangent direction of the cylindrical body; still include rabbling mechanism and backwash pump, during the axis of rotation of rabbling mechanism stretched into the tube-shape body, the one end of backwash pump was passed through the pipeline and is connected with the delivery port in extension district, and the backwash pump other end passes through the pipeline and is connected with the backward flow mouth of tube-shape body bottom.
Wherein, be equipped with water inlet and feed inlet on the jar side wall, be equipped with the guide plate that is the triangle cone shape on the jar internal side wall. The function of the guide plate in the tank body is as follows: in the stirring process, the heavy slag is beaten to the guide plate and falls to the bottom of the tank body along the guide plate.
The stirring mechanism comprises a motor arranged at the top of the cylindrical body and a rotating shaft fixedly connected with the driving end of the motor, and stirring blades are arranged at the end part of the rotating shaft.
Wherein, the degree of depth that the axis of rotation stretched into the tube-shape body is 1/2 ~ 2/3 of tube-shape body height, is not less than 1/2 promptly, and this degree of depth can realize the mixed flow to the material, further improves flotation separation effect in coordination, passes through the mixed flow to the original ecological rubbish promptly and realizes the homogeneity, the light heavy separation of being convenient for.
The extension area is internally provided with a grating device, and liquid thrown into the extension area under the action of centrifugal force flows through the grating device and is discharged through a water outlet; then pumped into the bottom of the cylindrical body by a reflux pump to provide an upward lifting force for the mixed liquid.
The grid device is a rotary rake tooth grid machine, and the aperture of a through hole in the rake tooth grid machine is less than or equal to 1 mm.
Wherein, the tube-shape body bottom is equipped with heavy sediment jar, and heavy sediment jar is used for collecting heavy sediment, and heavy sediment jar bottom is equipped with row cinder notch.
The cross section of the bottom of the cylindrical body is conical, so that dead zones can be avoided, and heavy slag collection is facilitated.
Wherein the solid-liquid ratio in the tank body is 8-10%, and the density difference of the light slag and the heavy slag is 1-1.5g/cm3。
Has the advantages that: because the density difference of the light and heavy residues of the kitchen waste is very small, on one hand, the light and heavy residue flotation separation device improves the light and heavy residue flotation separation effect by combining the centrifugal action with the buoyancy provided by the upward water flow; on the other hand, the tank body is prepared into a body and an extension area which is arranged in a tangent mode with the cylindrical body, the effect of flotation separation is cooperatively improved through the cylindrical body and the extension area which are arranged in the tangent mode, and the light objects are thrown out along the tangent line, so that the separation efficiency and the discharging uniformity can be further improved; the device can realize flotation separation of light and heavy residues in the kitchen garbage, and the separation is complete, so that smooth proceeding of a subsequent pulping process can be better guaranteed, and the quality of the prepared slurry is improved.
Drawings
FIG. 1 is a schematic diagram of the flotation separation apparatus of the present invention;
FIG. 2 is a top view of the connection of the tubular body to the extension;
FIG. 3 is a schematic structural view of a stirring blade;
fig. 4 is a plan view of the stirring blade.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in figures 1-4, the kitchen waste light and heavy slag flotation separation device comprises a tank body 1, wherein a water inlet 9 and a feed inlet are formed in the side wall of the tank body 1; the tank body 1 comprises a cylindrical body 13 and an extension area 12 arranged in a tangent mode with the cylindrical body 13, the cylindrical body 13 is communicated with the extension area 12, and the extension area 12 is arranged in the tangent direction of the cylindrical body 13; the light and heavy slag flotation separation device further comprises a stirring mechanism and a reflux pump 8, wherein the stirring mechanism comprises a motor 2 arranged at the top of the cylindrical body 13 and a rotating shaft 3 fixedly connected with the driving end of the motor, the end part of the rotating shaft 3 is provided with a stirring blade 4, the rotating shaft 3 extends into the cylindrical body 13, and the depth of the rotating shaft 3 extending into the cylindrical body 13 is 1/2-2/3 of the height of the cylindrical body 13, namely not less than 1/2; one end of the reflux pump 8 is connected with the water outlet 6 of the extension area 12 through a pipeline, and the other end of the reflux pump 8 is connected with the reflux port 11 at the bottom of the cylindrical body 13 through a pipeline. The landing legs 10 are welded at the four corners of the bottom of the tank body 1, and the landing legs 10 play a role in supporting the tank body 1. Three guide plates 11 in a triangular cone shape are arranged on the inner side wall of the tank body 1, and the three guide plates 11 are arranged in a ring shape; the effect of the guide plate 11 in the tank body 1 is as follows: in the stirring process, heavy slag is beaten to the guide plate 11 and falls to the bottom of the tank body 1 along the guide plate 11, so that the separation of light and heavy slag with small density difference is facilitated.
Wherein, a grating device 5 is arranged in the extension area 12, the grating device 5 is a rotary rake tooth grating machine, and the aperture of a through hole on the rake tooth grating machine is less than or equal to 1 mm; the liquid thrown into the extension area 12 under the action of centrifugal force flows through the grating device 5 and is discharged through the water outlet 6; then pumped into the bottom of the cylindrical body 13 through the reflux pump 8, and sprayed into the cylindrical body 13 from the bottom of the cylindrical body 13 to provide an upward lifting force for the mixed liquid in the cylindrical body 13.
The bottom of the cylindrical body 13 is provided with a heavy slag tank 7, the heavy slag tank 7 is used for collecting settled heavy slag, and the bottom of the heavy slag tank 7 is provided with a slag discharge hole.
The use method of the light and heavy slag flotation separation device comprises the following steps: after water is added into the tank body 1, the motor 2 is started, the stirring blades 4 are driven to rotate by the motor 2, the circulating pump 8 is started simultaneously to form centrifugal and ascending water flow, kitchen garbage enters the tank body 1 from a feed inlet on the side wall of the tank body 1 through a screw conveyor or other conveying equipment, heavy slag falls to the heavy slag tank 7 due to high density in the process and is discharged as a heavy slag finished product after being washed by clear water, light slag enters (is thrown into) the extension area 12 on the side face of the cylinder body under the action of the ascending water flow and the centrifugal force and is extracted and separated by the rotary rake tooth grating machine to be sent into a subsequent pulping system as a light slag finished product.
Firstly, adding water into the tank body 1 to the height of the bottom of the pipeline of the water outlet 6, meanwhile, automatically supplementing water in the tank body 1, automatically supplementing water after the height of the top of the pipeline of the water outlet 6 is lower, and repeatedly circulating the water in the tank body 1 in one production shift; then adding kitchen waste into the tank body 1 according to the solid-liquid ratio not more than 8% (the adding amount of the kitchen waste is 8% of the weight of water in the tank body 1), starting the motor 2, enabling the rotating speed of the motor 2 to be 200-800 r/min, determining the height difference of the central axis of the circulating pump 8 and the central axis of the water inlet 9 according to the placing position of the circulating pump 8, and selecting the lift of the circulating pump 8 based on the height difference to enable the circulating pump 8 to pump the height of water to reach the position of the water inlet 9; and the floated slag is extracted by a rotary rake tooth grating machine and then manually screened, and the proportion of heavy components in the discharged slag is 0.5-1%, so that the floated light slag finished product can be directly sent to a subsequent pulping system.
The stirring blade 4 has good anti-winding performance in appearance; the radian of each blade 3-2 is 160 degrees, the three blades 3-2 are arranged in an overlapping mode, the blades 3-2 are in a water drop shape, the water-facing surface of each blade gradually changes from small to large, and therefore materials are not prone to hanging, and good anti-winding performance is achieved.
Claims (9)
1. The utility model provides a light heavy sediment flotation separation device of kitchen garbage which characterized in that: the tank comprises a tank body (1), wherein the tank body (1) comprises a cylindrical body (13) and an extension area (12) which is tangential to the cylindrical body (13), the cylindrical body (13) is communicated with the extension area (12), and the extension area (12) is arranged along the tangential direction of the cylindrical body (13); the stirring device is characterized by further comprising a stirring mechanism and a reflux pump (8), wherein a rotating shaft (3) of the stirring mechanism extends into the cylindrical body (13), one end of the reflux pump (8) is connected with a water outlet (6) of the extension area (12) through a pipeline, and the other end of the reflux pump (8) is connected with a reflux opening (11) in the bottom of the cylindrical body (13) through a pipeline.
2. The kitchen waste light and heavy slag flotation separation device according to claim 1, characterized in that: the water inlet (9) and the feed inlet are arranged on the side wall of the tank body (1), and the guide plate is arranged inside the tank body (1).
3. The kitchen waste light and heavy slag flotation separation device according to claim 1, characterized in that: the stirring mechanism comprises a motor (2) arranged at the top of the cylindrical body (13) and a rotating shaft (3) fixedly connected with the driving end of the motor (2), and stirring blades (4) are arranged at the end part of the rotating shaft (3).
4. The kitchen waste light and heavy slag flotation separation device according to claim 3, characterized in that: the depth of the rotating shaft (3) extending into the cylindrical body (13) is 1/2-2/3 of the height of the cylindrical body (13).
5. The kitchen waste light and heavy slag flotation separation device according to claim 1, characterized in that: a grating device (5) is arranged in the extension area (12).
6. The kitchen waste light and heavy slag flotation separation device according to claim 5, characterized in that: the grating device (5) is a rotary rake tooth grating machine, and the aperture of a through hole in the rake tooth grating machine is less than or equal to 1 mm.
7. The kitchen waste light and heavy slag flotation separation device according to claim 1, characterized in that: the heavy slag ladle is characterized in that a heavy slag ladle (7) is arranged at the bottom of the cylindrical body (13), the heavy slag ladle (7) is used for collecting heavy slag, and a slag discharge port is arranged at the bottom of the heavy slag ladle (7).
8. The kitchen waste light and heavy slag flotation separation device according to claim 1, characterized in that: the cross section of the bottom of the cylindrical body (13) is conical.
9. The kitchen waste light and heavy slag flotation separation device according to claim 1, characterized in that: the solid-liquid ratio in the tank body (1) is 8-10%, and the density difference of the light slag and the heavy slag is 1-1.5g/cm3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110684719.1A CN113477392A (en) | 2021-06-21 | 2021-06-21 | Kitchen garbage light and heavy slag flotation separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110684719.1A CN113477392A (en) | 2021-06-21 | 2021-06-21 | Kitchen garbage light and heavy slag flotation separation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113477392A true CN113477392A (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110684719.1A Pending CN113477392A (en) | 2021-06-21 | 2021-06-21 | Kitchen garbage light and heavy slag flotation separation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113477392A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982430A (en) * | 2010-10-19 | 2011-03-02 | 江苏省环境科学研究院 | Novel concentric anaerobic baffled hydrolytic reactor |
| CN202492620U (en) * | 2012-02-14 | 2012-10-17 | 六安市海洋羽毛有限公司 | Iron removing device for feathers |
| CN103008327A (en) * | 2012-12-03 | 2013-04-03 | 城市建设研究院 | Kitchen waste pretreatment method and equipment thereof |
| CN203125772U (en) * | 2013-01-31 | 2013-08-14 | 冯愚斌 | Rotational flow type waste plastic breaking, sorting and cleaning system |
| CN208005964U (en) * | 2018-01-24 | 2018-10-26 | 青岛顺运通运输装备有限公司 | Mortar stock stirring device |
| CN212309892U (en) * | 2020-05-27 | 2021-01-08 | 山东华宇工学院 | Cyclone separator, separation device and production line |
| CN112225315A (en) * | 2019-07-15 | 2021-01-15 | 中节能六合天融环保科技有限公司 | Packing fluidization dispersion type sewage treatment device |
| CN112374654A (en) * | 2020-11-20 | 2021-02-19 | 荆州科美科技有限公司 | Glass edging effluent treatment plant |
| CN112452552A (en) * | 2020-10-30 | 2021-03-09 | 中国矿业大学 | Coarse-grained mineral dissociation device and method integrating tailing discarding and dissociation |
-
2021
- 2021-06-21 CN CN202110684719.1A patent/CN113477392A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982430A (en) * | 2010-10-19 | 2011-03-02 | 江苏省环境科学研究院 | Novel concentric anaerobic baffled hydrolytic reactor |
| CN202492620U (en) * | 2012-02-14 | 2012-10-17 | 六安市海洋羽毛有限公司 | Iron removing device for feathers |
| CN103008327A (en) * | 2012-12-03 | 2013-04-03 | 城市建设研究院 | Kitchen waste pretreatment method and equipment thereof |
| CN203125772U (en) * | 2013-01-31 | 2013-08-14 | 冯愚斌 | Rotational flow type waste plastic breaking, sorting and cleaning system |
| CN208005964U (en) * | 2018-01-24 | 2018-10-26 | 青岛顺运通运输装备有限公司 | Mortar stock stirring device |
| CN112225315A (en) * | 2019-07-15 | 2021-01-15 | 中节能六合天融环保科技有限公司 | Packing fluidization dispersion type sewage treatment device |
| CN212309892U (en) * | 2020-05-27 | 2021-01-08 | 山东华宇工学院 | Cyclone separator, separation device and production line |
| CN112452552A (en) * | 2020-10-30 | 2021-03-09 | 中国矿业大学 | Coarse-grained mineral dissociation device and method integrating tailing discarding and dissociation |
| CN112374654A (en) * | 2020-11-20 | 2021-02-19 | 荆州科美科技有限公司 | Glass edging effluent treatment plant |
Non-Patent Citations (1)
| Title |
|---|
| 郭永学: "《制药设备与车间设计》", 31 December 2019, 中国医药科技出版社 * |
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Application publication date: 20211008 |