CN109013045B - Garbage desanding system and desanding method - Google Patents
Garbage desanding system and desanding method Download PDFInfo
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- CN109013045B CN109013045B CN201810687683.0A CN201810687683A CN109013045B CN 109013045 B CN109013045 B CN 109013045B CN 201810687683 A CN201810687683 A CN 201810687683A CN 109013045 B CN109013045 B CN 109013045B
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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
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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
- B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
- B03B5/52—Spiral classifiers
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Abstract
The invention discloses a garbage desanding system and a desanding method, wherein the system comprises a homogenizing pool, an aeration desander, an aeration system and a sand lifting screw machine; the homogenizing tank is communicated with the input end of the aeration desander through a first pipeline so as to guide the garbage slurry in the homogenizing tank into the aeration desander; the aeration system is communicated with the inside of the aeration desander through an aeration pipeline; the bottom end of the sand extracting screw is communicated with the inner wall of the aeration desander so as to discharge sand settled in the aeration desander; the outlet of the aeration desander is communicated to the homogeneous tank through a second pipeline so as to realize the circulating desanding of the garbage slurry through the homogeneous tank and the aeration desander, and the homogeneous tank is communicated with a discharge pipeline used for discharging a product after the desanding treatment. The device can lead the garbage slurry to be circularly degritted through the homogenizing tank and the aeration desander, thereby effectively removing sand grains in the garbage slurry, the removal rate can reach more than 99 percent, effectively preventing the damage of the sand grains in the garbage such as kitchen and the like to treatment equipment and/or pipelines, and improving the reliability of system operation.
Description
Technical Field
The invention relates to the field of garbage treatment, in particular to a garbage desanding system and a desanding method.
Background
At present, the domestic kitchen waste recycling technology is continuously developed, and various processes are diversified, however, heavy substances (hereinafter referred to as sand grains) such as fine sand, small hard shells, small iron blocks, fragment ceramics, glass and the like contained in the kitchen waste are always the most troublesome problems in the whole kitchen waste treatment process. The sand particles in the kitchen waste inevitably cause slag deposits in the treatment equipment and the liquid phase conveying system, thereby causing equipment halt and pipeline blockage, and the long-term operation of the system also causes serious abrasion of pipelines, pumps and stirrers. Therefore, a sand removing system is very necessary in the kitchen waste treatment process.
CN 204523572U discloses a kitchen waste slurry desanding and draining device, which comprises a shell which is a containing body, wherein a feed inlet is formed in one side of the shell and is used for being butted with a liquid outlet of a kitchen waste impurity removal and pulping all-in-one machine, a liquid draining mechanism and a sand discharging mechanism are further arranged on the shell, the sand discharging mechanism comprises a sand discharging barrel which is obliquely arranged, the lower end of the sand discharging barrel is communicated with the lowest part of the shell, the upper end of the sand discharging barrel obliquely extends out of the shell towards the outer upper part and is coaxially and fixedly provided with a sand discharging motor at the end part, a sand discharging helical blade is further axially arranged in the sand discharging barrel, the lower surface of the sand discharging helical blade is attached to the lower surface of an inner cavity of the sand discharging barrel, the sand discharging helical blade is connected with the; the liquid outlet mechanism comprises a liquid outlet pump for discharging liquid. The sand removing and liquid discharging mechanism only utilizes the matching of the sand discharging helical blade and the sand discharging motor to remove sand of slurry in the shell, and the sand removing effect is to be improved.
Disclosure of Invention
The invention provides a garbage desanding system and a garbage desanding method, which aim to solve the technical problem that the existing garbage slurry desanding effect needs to be improved.
The technical scheme adopted by the invention is as follows:
according to one aspect of the invention, a garbage desanding system is provided, which comprises a homogenizing pool, an aeration desander, an aeration system and a sand extracting screw machine; the homogenizing tank is used for receiving and storing the garbage slurry, and is communicated with the input end of the aeration desander through a first pipeline so as to guide the garbage slurry in the homogenizing tank into the aeration desander;
the aeration system is communicated with the inside of the aeration desander through an aeration pipeline and is used for enabling the garbage slurry in the aeration desander to flow spirally so as to separate organic matters from sand grains;
the bottom end of the sand extracting screw is communicated with the inner wall of the aeration desander so as to discharge sand settled in the aeration desander;
the outlet of the aeration desander is communicated to the homogeneous tank through a second pipeline so as to realize the circulating desanding of the garbage slurry through the homogeneous tank and the aeration desander, and the homogeneous tank is communicated with a discharge pipeline used for discharging a product after the desanding treatment.
Furthermore, a sand remover circulating pump for driving the garbage slurry in the homogenizing tank to perform circulating sand removal is arranged on the first pipeline, and the position of a suction inlet of the first pipeline in the homogenizing tank is adjustable.
Further, a stirrer for uniformly mixing the garbage slurry in the homogenizing pool is arranged in the homogenizing pool.
Furthermore, the outlet of the aeration desander is connected with a buffer tank through a third pipeline, and the outlet of the buffer tank is communicated with a discharge pipeline.
Furthermore, a sand collecting groove for collecting settled sand is arranged at the bottom end of the box body of the aeration desander, and the bottom end of the sand lifting screw machine extends into the sand collecting groove, is obliquely arranged and extends out of the aeration desander.
Furthermore, the upper part of the box body of the aeration desander is rectangular, the lower part of the box body gradually shrinks towards the center along the two sides of the width direction to form an inclined part, and the inclined part is connected with the sand collecting groove.
Further, aeration systems is including being located the first aeration pipeline of aeration desander and arranging along its axial, and the interval sets up a plurality of aeration mouths on the first aeration pipeline, and first aeration pipeline is through a plurality of second aeration pipelines intercommunication at least one aeration fan that extend to the aeration desander outside.
Furthermore, the aeration fan is a variable frequency fan, and the second aeration pipeline is provided with an adjusting valve for adjusting the air volume of each pipeline.
According to another aspect of the present invention, there is also provided a method for removing sand from garbage, which uses the above-mentioned garbage removing system, including the following steps:
introducing the garbage slurry to be treated into a homogenizing pool;
the circulation desanding of the garbage slurry is realized through the matching of the first pipeline and the second pipeline, the aeration system and the sand lifting screw machine are synchronously driven to work, the separation of organic matters and sand grains in the garbage slurry is realized, and the sand grains are discharged through the sand lifting screw machine;
and judging whether the garbage slurry in the homogenizing tank meets set conditions, if so, discharging through a discharge pipeline, otherwise, continuously performing circulating sand removal, and setting the conditions to meet the solid content requirement of the garbage slurry.
Further, the method for removing the sand from the garbage comprises the following steps:
when the homogenizing tank is overhauled, the aeration desander is controlled to be communicated with the buffer tank through a third pipeline.
The invention has the following beneficial effects:
according to the garbage desanding system, the homogenizing pool, the aeration desander, the first pipeline and the second pipeline are arranged between the homogenizing pool and the aeration desander, so that garbage slurry can be subjected to circulating desanding through the homogenizing pool and the aeration desander, sand grains in the garbage slurry can be effectively removed, the removal rate can reach more than 99%, damage of the sand grains in the garbage such as kitchen garbage to treatment equipment and/or pipelines is effectively avoided, and the running reliability of the system is improved.
According to the garbage desanding method, the garbage slurry is circularly desanded by applying the garbage desanding system, the desanding effect of the garbage slurry is improved, the garbage slurry after desanding treatment can be discharged after meeting the solid content requirement, and the system maintenance and the operation reliability are facilitated.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a waste grit removal system in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic view showing the structure of an aerated grit catcher in the preferred embodiment of the present invention;
FIG. 3 is a schematic view showing the structure of an aeration system in the preferred embodiment of the present invention.
Description of reference numerals:
1. a homogenizing pool; 11. a stirrer; 2. a first pipeline; 21. a desander circulation pump;
3. an aeration desander; 4. an aeration system; 5. a sand extracting screw machine; 6. a second pipeline; 7. a third pipeline; 8. a buffer tank; 9. a discharge pipeline; 91. a discharge pump; 10. a feed line; 101. a knife gate valve;
31. a sand collecting tank; 32. an inclined portion;
41. a first aeration line; 42. a second aeration line; 43. an aeration fan; 44. and adjusting the valve.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, the preferred embodiment of the present invention provides a garbage desanding system, which comprises a homogenizing tank 1, an aeration desander 3, an aeration system 4, and a sand lifting screw 5; the homogenizing tank 1 is used for receiving and storing garbage slurry, and the homogenizing tank 1 is communicated with the input end of the aeration desander 3 through a first pipeline 2 so as to guide the garbage slurry in the homogenizing tank 1 into the aeration desander 3; the aeration system 4 is communicated with the inside of the aeration desander 3 through an aeration pipeline and is used for enabling the garbage slurry in the aeration desander 3 to flow spirally so as to separate organic matters and sand grains; the bottom end of the sand extracting screw machine 5 is communicated with the inner wall of the aeration desander 3 so as to discharge sand settled in the aeration desander 3; the outlet of the aeration desander 3 is communicated to the homogeneous tank 1 through a second pipeline 6 so as to realize the circulating desanding of the garbage slurry through the homogeneous tank 1 and the aeration desander 3, and the homogeneous tank 1 is communicated with a discharge pipeline 9 for discharging the desanding processed product.
In the embodiment, the garbage slurry is kitchen garbage treated by a pretreatment workshop, the homogenizing pool 1 is communicated with a feeding pipeline 10 for guiding the kitchen garbage, a knife gate valve 101 is arranged on the feeding pipeline 10, the total amount of the garbage slurry entering the homogenizing pool 1 is controlled by controlling the on-off of the knife gate valve 101, during sand removing operation, a sand remover circulating pump 21 on a first pipeline 2 drives the garbage slurry in the homogenizing pool 1 to enter an aeration sand remover 2, the aeration sand remover 2 drives the garbage slurry to spirally advance in a box body under the action of an aeration system 4, so that synchronous material conveying and separation of sand grains and organic matters are realized, the separated sand grains are discharged to a special collecting device through a sand lifting screw 5 and are finally buried, the separated garbage slurry enters the homogenizing pool 1 through a second pipeline 6 to be mixed, the steps of the garbage slurry in the homogenizing pool 1 are repeated under the driving of the sand remover circulating pump 21, so as to carry out the circulating sand removing operation.
In this embodiment, at least one stirrer 11 for enhancing the mixing effect of the garbage slurry is arranged in the homogenizing pool 1, so that the original slurry in the homogenizing pool 1 is mixed with the garbage slurry flowing back to the homogenizing pool 1 through the second pipeline 6. Preferably, the position of the suction inlet of the first pipeline 2 in the homogenizing tank 1 is adjustable, and the slurry in the homogenizing tank 1 is continuously sent into the aeration sand remover 3 for sand removing operation by changing the position of the suction inlet for many times and starting the stirrer 11 under the driving of the sand remover circulating pump 21.
Through experimental tests, the garbage desanding system of the embodiment is provided with the homogenizing tank, the aeration desander, the first pipeline and the second pipeline which are positioned between the homogenizing tank and the aeration desander, so that garbage slurry can be subjected to circulating desanding through the homogenizing tank and the aeration desander, sand grains in the garbage slurry can be effectively removed, the removal rate can reach more than 99%, damage of the sand grains in garbage such as kitchen garbage to treatment equipment and/or pipelines is effectively avoided, and the running reliability of the system is improved. In this embodiment, the homogenizing tank 1 can also realize adjustment of the slurry TS (solid content rate) in addition to storage of the slurry, and can enable the solid content rate of the slurry to meet the setting requirement through multiple times of circulating desanding operation.
Preferably, referring to fig. 1, the outlet of the aerated grit catcher 3 is also connected with a buffer tank 8 through a third pipeline 7, and the outlet of the buffer tank 8 is communicated with a discharge pipeline 9. In this embodiment, the discharge pump 91 is disposed on the discharge pipeline 9, the electromagnetic valve is disposed on the first branch of the discharge pipeline connected to the homogenizing tank, and the electromagnetic valve is also disposed on the second branch of the discharge pipeline connected to the buffer tank 8. Buffer tank 8 can play emergent cushioning effect, when homogeneity pond 1 overhauls, thereby realizes the switching of liquid phase return circuit through the control solenoid valve, and guide thick liquids pass through buffer tank 8, then the ejection of compact, so both can the protection pump avoid dry friction or do the commentaries on classics, also can deposit the interior grit of thick liquids.
In the embodiment, referring to fig. 2, a sand collecting tank 31 for collecting settled sand is arranged at the bottom end of the box body of the aeration sand remover 3, and the bottom end of the sand lifting screw 5 extends into the sand collecting tank 31, is obliquely arranged and extends out of the aeration sand remover 3. Preferably, the upper portion of the box of the sand aerator 3 is rectangular, and the lower portion is tapered toward the center along both sides in the width direction to form inclined portions 32, and the sand collecting tank 31 is connected through the inclined portions 32. By adopting the structural design, the sand sedimentation is convenient, and the sand discharge of the sand extracting screw machine is facilitated.
In this embodiment, referring to fig. 3, the aeration system 4 includes a first aeration pipeline 41 located inside the aerated grit catcher 3 and arranged along the axial direction thereof, a plurality of aeration openings are provided at intervals on the first aeration pipeline 41, and the first aeration pipeline 41 is communicated with at least one aeration fan 43 through a plurality of second aeration pipelines 42 extending to the outside of the aerated grit catcher 3. Under the action of the aeration system 4, the cross section of the slurry in the aeration desander forms a rotational flow, so that the slurry spirally advances in the box body of the aeration desander, preferably, the feeding direction is consistent with the rotational flow direction, the rotational flow enables organic matters and sand grains to be separated on one hand, on the other hand, the settled sand grains are flushed into a sand collecting groove, the sand grains in the sand collecting groove are discharged to a special collecting device through a sand lifting screw machine and are finally buried, and organic matters are discharged from the outlet of the aeration desander, so that the effective separation of the organic matters and the sand grains is finally realized.
Preferably, in this embodiment, the aeration fan 43 is a variable frequency fan, and the second aeration pipeline 42 is provided with an adjusting valve 44 for adjusting air volume of each pipeline, so that aeration volume can be adjusted, aeration is uniform and stable, and effective separation of sand grains and organic matters is promoted.
According to another aspect of the present invention, an embodiment of a method for removing sand from garbage is further provided, in which the garbage removing system of the above embodiment is applied, the method of this embodiment includes the following steps:
introducing garbage slurry to be treated into a homogenizing tank 1;
the circulation desanding of the garbage slurry is realized through the matching of the first pipeline 2 and the second pipeline 6, the aeration system 4 and the sand lifting screw machine are synchronously driven to work, the separation of organic matters and sand grains in the garbage slurry is realized, and the sand grains are discharged through the sand lifting screw machine 5;
and judging whether the garbage slurry in the homogenizing tank 1 meets the set conditions, if so, discharging through a discharge pipeline 9, otherwise, continuously performing circulating sand removal, and setting the conditions to meet the solid content requirement of the garbage slurry.
The method realizes the circular desanding of the garbage slurry, improves the desanding effect of the garbage slurry, enables the garbage slurry after the desanding treatment to be discharged after meeting the solid content requirement, and is beneficial to system maintenance and operation reliability.
Preferably, the method for removing sand from garbage further comprises:
when the homogenizing tank 1 is overhauled, the aeration desander 3 is controlled to be communicated with the buffer tank 8 through the third pipeline 7.
The method is favorable for online maintenance of the homogenizing tank, and during maintenance, the liquid phase loop is controlled and switched, so that the pump can be protected from dry friction or dry rotation, part of sand grains in the slurry can be deposited, and the reliability of system operation is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A garbage desanding system is characterized by comprising a homogenizing tank (1), an aeration desander (3), an aeration system (4) and a sand lifting screw machine (5); the homogenizing tank (1) is used for receiving and storing garbage slurry, and the homogenizing tank (1) is communicated with the input end of the aeration sand remover (3) through a first pipeline (2) so as to guide the garbage slurry in the homogenizing tank (1) into the aeration sand remover (3);
the aeration system (4) is communicated with the inside of the aeration desander (3) through an aeration pipeline and is used for enabling the garbage slurry in the aeration desander (3) to flow spirally to separate organic matters and sand grains;
the bottom end of the sand extracting screw machine (5) is communicated with the inner wall of the aeration desander (3) so as to discharge sand settled in the aeration desander (3);
the outlet of the aeration desander (3) is communicated into the homogenizing tank (1) through a second pipeline (6) so as to realize the circulating desanding of the garbage slurry through the homogenizing tank (1) and the aeration desander (3), and the homogenizing tank (1) is communicated with a discharge pipeline (9) for discharging a product after the desanding treatment;
the first pipeline (2) is provided with a sand remover circulating pump (21) for driving the garbage slurry in the homogenizing tank (1) to perform circulating sand removal, and the position of a suction inlet of the first pipeline (2) in the homogenizing tank (1) is adjustable.
2. A waste desanding system as claimed in claim 1,
a stirrer (11) for uniformly mixing the garbage slurry in the homogenizing pool (1) is arranged in the homogenizing pool.
3. A waste desanding system as claimed in claim 1,
the outlet of the aeration sand remover (3) is also connected with a buffer tank (8) through a third pipeline (7), and the outlet of the buffer tank (8) is communicated with the discharging pipeline (9).
4. A waste desanding system as claimed in claim 1,
a sand collecting groove (31) for collecting settled sand is arranged at the bottom end of the box body of the aeration desander (3), and the bottom end of the sand lifting screw machine (5) extends into the sand collecting groove (31), is obliquely arranged and extends out of the aeration desander (3).
5. A waste desanding system as claimed in claim 4,
the upper part of the box body of the aeration sand remover (3) is rectangular, the lower part of the box body gradually shrinks towards the center along the two sides of the width direction to form an inclined part (32), and the inclined part (32) is connected with the sand collecting groove (31).
6. A waste desanding system as claimed in claim 1,
the aeration system (4) comprises a first aeration pipeline (41) which is positioned in the aeration desander (3) and is arranged along the axial direction of the aeration desander, a plurality of aeration openings are arranged on the first aeration pipeline (41) at intervals, and the first aeration pipeline (41) is communicated with at least one aeration fan (43) through a plurality of second aeration pipelines (42) which extend to the outside of the aeration desander (3).
7. A waste desanding system as claimed in claim 6,
the aeration fan (43) is a variable frequency fan, and the second aeration pipeline (42) is provided with an adjusting valve (44) for adjusting the air volume of each pipeline.
8. A method for removing sand from garbage by applying the system for removing sand from garbage according to any one of claims 1 to 7, comprising the steps of:
introducing garbage slurry to be treated into a homogenizing pool (1);
the circulation desanding of the garbage slurry is realized through the matching of the first pipeline (2) and the second pipeline (6), the aeration system (4) and the sand lifting screw machine are synchronously driven to work, the separation of organic matters and sand grains in the garbage slurry is realized, and the sand grains are discharged through the sand lifting screw machine (5); during circulating desanding, the position of a suction inlet of the first pipeline (2) in the homogenizing tank (1) is changed for many times to realize that the slurry in the homogenizing tank (1) is continuously sent into the aeration desander (3) for desanding operation;
and judging whether the garbage slurry in the homogenizing tank (1) meets a set condition, if so, discharging through a discharge pipeline (9), otherwise, continuously performing circulating sand removal, wherein the set condition is the solid content requirement of the garbage slurry.
9. A method of degritting waste according to claim 8,
further comprising:
when the homogenizing tank (1) is overhauled, the aeration desander (3) is controlled to be communicated with the buffer tank (8) through a third pipeline (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810687683.0A CN109013045B (en) | 2018-06-28 | 2018-06-28 | Garbage desanding system and desanding method |
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| CN201810687683.0A CN109013045B (en) | 2018-06-28 | 2018-06-28 | Garbage desanding system and desanding method |
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| CN115245954B (en) * | 2022-06-16 | 2023-08-01 | 丽水旺能生态科技有限公司 | Anaerobic biogas residue continuous treatment process for kitchen waste |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3549011A (en) * | 1968-07-01 | 1970-12-22 | Black Clawson Co | Method and apparatus for disposing of solid wastes |
| US4338337A (en) * | 1980-03-24 | 1982-07-06 | Frankl Gerald P | Method for recovering and recycling animal waste materials |
| CN202411084U (en) * | 2012-02-06 | 2012-09-05 | 重庆市环卫控股（集团）有限公司 | Kitchen waste treatment system |
| CN102744242A (en) * | 2012-07-31 | 2012-10-24 | 安阳艾尔旺新能源环境有限公司 | Disposal process of kitchen garbage |
| CN204523750U (en) * | 2015-04-16 | 2015-08-05 | 重庆市环卫控股（集团）有限公司 | Changing food waste slurries desanding liquid discharge device shell structure |
| CN204958567U (en) * | 2015-08-19 | 2016-01-13 | 桑德环境资源股份有限公司 | Kitchen garbage thick liquid degritting system |
| CN106694518B (en) * | 2016-12-28 | 2019-04-12 | 长沙中联重科环境产业有限公司 | Kitchen garbage impurity removing equipment and its control method, equipment and refuse disposal system |
| CN107552252B (en) * | 2017-08-15 | 2020-06-19 | 长沙中联重科环境产业有限公司 | Mortar separation equipment for kitchen waste |
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