CN111359770A - Construction waste treatment method - Google Patents
Construction waste treatment method Download PDFInfo
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- CN111359770A CN111359770A CN202010297752.4A CN202010297752A CN111359770A CN 111359770 A CN111359770 A CN 111359770A CN 202010297752 A CN202010297752 A CN 202010297752A CN 111359770 A CN111359770 A CN 111359770A
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- construction waste
- impurities
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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
- B03B5/28—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
- B03B5/36—Devices therefor, other than using centrifugal force
- B03B5/40—Devices therefor, other than using centrifugal force of trough type
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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
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
- B03B9/061—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial
- B03B9/065—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial the refuse being building rubble
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/58—Construction or demolition [C&D] waste
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The utility model relates to a building rubbish processing method, building rubbish passes through a series of processes such as one-level screening plant, manual sorting, one-level breaker, magnetic separation device, washing flotation device, wind selector, drying process, second grade breaker, magnetic separation device, second grade screening plant, tertiary screening plant, can effectively get rid of steel metal, wood waste, waste plastics, waste paper and other impurity in the building rubbish, handle building rubbish into qualified regeneration building aggregate, avoid building rubbish occupation of land and polluted environment, and recycle, especially promoted the clearance to light impurity such as wood waste, waste plastics, further guaranteed the quality of regeneration building aggregate.
Description
Technical Field
The disclosure relates to the technical field of construction waste recovery, in particular to a construction waste treatment method.
Background
The construction waste is solid waste generated in the process of building, rebuilding, expanding or dismantling a building, the construction waste occupies large land, pollutes water and soil, atmospheric environment and influences the environment of city appearance by random disposal, and if the construction waste is scientifically and reasonably treated and reused, the influence of the construction waste on the environment can be reduced, and the consumption of natural resources by city construction can be reduced.
The construction waste contains impurities such as steel, metal, waste wood, waste plastic and waste paper, and if the construction waste is recycled, the impurities which cannot be recycled must be effectively separated to form qualified recycled construction aggregate, especially the light impurities such as waste wood, waste plastic and waste paper, which seriously affect the quality and quality of the recycled construction aggregate.
Therefore, the application provides a construction waste treatment method.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present disclosure provides a construction waste treatment method.
The technical scheme adopted by the invention is as follows:
a construction waste treatment method comprises the following steps:
the method comprises the following steps: conveying the construction waste into a primary screening device, removing small-size impurities in the construction waste, and forming first construction waste;
step two: conveying the first construction waste into a conveying belt, manually sorting the first construction waste to remove large-size impurities in the first construction waste and form second construction waste;
step three: sending the second construction waste into a primary crushing device for crushing treatment to form third construction waste;
step four: conveying the third construction waste into a conveying belt, wherein a magnetic separation device is arranged above the conveying belt, and magnetically separating the third construction waste to remove metal impurities in the third construction waste and form fourth construction waste;
step five: feeding the fourth building rubbish into a washing flotation device, removing light impurities and soil in the fourth building rubbish, and forming fifth building rubbish, wherein the washing flotation device comprises a water tank, a discharging conveyer belt is arranged in the water tank, a feed hopper is arranged on the left side of the water tank, a guide plate inclining downwards is arranged on the left wall of the feed hopper, a discharging opening is formed between the bottom of the guide plate and the right wall of the feed hopper, a flushing water pipe inclining upwards is arranged at the bottom of the left wall of the feed hopper, and a water column sprayed by the flushing water pipe is aligned to the discharging opening;
step six: conveying the fifth construction waste into an air separation device, removing light impurities in the fifth construction waste, and forming sixth construction waste;
step seven: drying the sixth construction waste;
step eight: sending the dried sixth construction waste into a secondary crushing device for crushing treatment to form seventh construction waste;
step nine: conveying the seventh construction waste into a conveying belt, wherein a magnetic separation device is arranged above the conveying belt, and performing magnetic separation treatment on the seventh construction waste to remove metal impurities in the seventh construction waste and form eighth construction waste;
step ten: conveying the eighth construction waste into a secondary screening device, sorting again through the secondary screening device, conveying the ninth construction waste passing through the secondary screening device back to the eighth step for crushing again until the ninth construction waste passes through the secondary screening device;
step eleven: and (4) conveying the ninth building garbage into a third-stage screening device, and removing small-size particles in the ninth building garbage again to form the recycled building aggregate.
And further, performing water mist dust removal operation at a feed inlet of the primary crushing device in the third step.
Specifically, the mesh opening size of the primary screening device in the first step is 5mm, the mesh opening size of the secondary screening device in the tenth step is 40mm, and the mesh opening size of the tertiary screening device in the eleventh step is 5 mm.
Specifically, the large-size impurities in the second step include metal impurities, plastic impurities, wood impurities and waste paper impurities.
Specifically, the first-stage crushing device in the third step is a jaw crusher, and the second-stage crushing device in the eighth step is a cone crusher.
Further, in the seventh step, the sixth construction waste is dried by using high-temperature air, and the temperature of the high-temperature air is 300 ℃.
Further, the feeder hopper antetheca is provided with the water conservancy diversion spray tube, and the water level of water conservancy diversion spray tube and feeder hopper flushes.
Further, an overflow notch is formed in the rear wall of the feeding hopper, the overflow notch is connected with a water collecting tank, a filter screen is arranged in the water collecting tank, and a sealing door plate is installed at the overflow notch.
In conclusion, the scheme of the invention can effectively remove impurities such as steel, metal, waste wood, waste plastic and waste paper in the construction waste, treat the construction waste into qualified recycled construction aggregate, avoid the occupation of land and the pollution to the environment of the construction waste, recycle the construction waste, particularly improve the clearance rate of light impurities such as the waste wood, the waste plastic and the waste paper, and further ensure the quality of the recycled construction aggregate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic diagram of a water wash flotation unit of the present invention;
fig. 3 is a schematic diagram of the water washing flotation device and the water collecting tank in the invention.
The labels in the figure are: the device comprises a water tank 1, a discharge conveying belt 2, a feed hopper 3, a material guide plate 4, a feed opening 5, a flushing water pipe 6, a flow guide spray pipe 7, an overflow notch 8, a water collecting tank 9 and a filter screen 10.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
As shown in fig. 1 and 2, a construction waste treatment method:
the method comprises the following steps: conveying the construction waste into a primary screening device to remove small-size impurities in the construction waste and form first construction waste, wherein the aperture of a sieve pore of the primary screening device is 5mm, and primarily screening out impurities with the particle size of below 5 mm;
step two: conveying the first construction waste into a conveying belt, manually sorting the first construction waste to remove large-size impurities in the first construction waste and form second construction waste, wherein the large-size impurities mainly comprise metal impurities, plastic impurities, wood impurities and waste paper impurities;
step three: sending the second construction waste into a primary crushing device for crushing treatment to form third construction waste, wherein the primary crushing device can be selected according to actual needs, and is specifically a jaw crusher;
step four: conveying the third construction waste into a conveying belt, wherein a magnetic separation device is arranged above the conveying belt, and magnetically separating the third construction waste to remove metal impurities in the third construction waste and form fourth construction waste;
step five: feeding the fourth building rubbish into a washing flotation device, removing light impurities and soil in the washing flotation device, wherein the light impurities mainly comprise waste wood, waste plastic, waste paper and the like, and forming the fifth building rubbish, the washing flotation device comprises a water tank 1, a discharging conveyer belt 2 is arranged in the water tank 1, a feed hopper 3 is arranged on the left side of the water tank 1, a guide plate 4 inclining downwards is arranged on the left wall of the feed hopper 3, a discharge opening 5 is formed between the bottom of the guide plate 4 and the right wall of the feed hopper 3, a flushing water pipe 6 inclining upwards is arranged at the bottom of the left wall of the feed hopper 3, and water columns sprayed by the flushing water pipe 6 are aligned to the; in the process that the flushing water pipe 6 is aligned with the feed opening 6 and impacts upwards, the construction waste enters the feed opening 5 from top to bottom to form reverse motion, the reverse water column acts on the construction waste to flush light impurities in the construction waste to the water surface so as to separate the light impurities in the construction waste and collect the light impurities, meanwhile, water flow can flush soil in the construction waste, the construction waste of the washing flotation device is prevented from being discharged with the sludge, and the light impurities and the soil in the construction waste can be effectively removed through the process;
step six: conveying the fifth construction waste into an air separation device, further removing light impurities in the fifth construction waste, wherein the light impurities mainly comprise waste wood, waste plastic, waste paper and the like, and forming sixth construction waste;
step seven: drying the sixth construction waste, specifically, drying the sixth construction waste by using high-temperature air, wherein the temperature of the high-temperature air is 300 ℃, the high-temperature air can be generated through a natural gas furnace (not shown in the figure), the generation process of the high-temperature air and related equipment are conventional technologies in the field, the description is omitted, the sixth construction waste is dried by using high-temperature flue gas, the mortar attached to the surface of the sixth construction waste is more easily dehydrated and weakened, the mortar is more easily dropped in the secondary crushing process, and the cleanliness of the subsequent recycled construction aggregate is improved;
step eight: sending the dried sixth construction waste into a second-stage crushing device for crushing to form seventh construction waste, wherein the second-stage crushing device can be selected according to actual needs, and is specifically a cone crusher, so that metal impurities fixed in the construction waste can be further exposed while the secondary crushing is carried out to achieve the purpose of crushing;
step nine: conveying the seventh construction waste into a conveying belt, wherein a magnetic separation device is arranged above the conveying belt, and performing magnetic separation treatment on the seventh construction waste to further remove metal impurities in the seventh construction waste and form eighth construction waste, wherein the magnetic separation treatment can further absorb the metal impurities generated by secondary crushing;
step ten: conveying the eighth construction waste into a secondary screening device, sorting the eighth construction waste again through the secondary screening device, conveying the construction waste which does not pass through the secondary screening device back to the eighth step for crushing again until the construction waste passes through the secondary screening device, wherein the mesh diameter of a screen of the secondary screening device is 40mm, and the construction waste with the particle size larger than 40mm needs to be returned to the eighth step for crushing again;
step eleven: and (4) feeding the ninth building garbage into a third-stage screening device, wherein the mesh aperture of the third-stage screening device is 5mm, and removing small-size particles in the third-stage screening device again to form the recycled building aggregate with the particle size of 5-40 mm.
And furthermore, the feed inlet of the primary crushing device in the third step is subjected to water mist dust removal operation, and the water mist dust removal can effectively reduce the dust raising of the feed inlet of the primary crushing device and avoid pollution.
It should be noted that the primary screening device (which may employ a linear vibrating screen), the primary crushing device, the magnetic separation device, the air separation device, the secondary crushing device, the magnetic separation device, the secondary screening device (which may employ a linear vibrating screen), and the tertiary screening device (which may employ a linear vibrating screen) in the present application are all conventional devices in the field, and may be selected according to actual needs, and the structures thereof are not described herein again; meanwhile, the structure and the process principle of the washing flotation device are designed.
Example 2
As shown in fig. 3, on the basis of embodiment 1, the front wall of the feeding hopper 3 is provided with the diversion nozzles 7, the diversion nozzles 7 are flush with the water level of the feeding hopper 3, the diversion nozzles 7 are uniformly arranged in a plurality along the width direction of the front wall, the specific number is determined according to actual needs, and the water columns sprayed by the diversion nozzles 7 can push the light impurities on the water surface of the feeding hopper 3 to the rear wall position uniformly so as to be cleaned in a centralized manner.
Example 3
As shown in fig. 3, on the basis of embodiment 2, overflow breach 8 has been seted up to feeder hopper 3 back wall, overflow breach 8 is connected with header tank 9, is provided with filter screen 10 in the header tank 9, sealed door plant (not shown in the figure) is installed to overflow breach 8, when the levitate light impurity of back wall position is enough many, can open sealed door plant, carry out the overflow and handle, levitate light impurity flows out through overflow breach 8, light impurity is intercepted by filter screen 10, the overflow water then gets into in the header tank 9, water in the header tank 9 can be retrieved to the water source department reuse that intakes of wash pipe 6, this process can convenient and fast carry out the collection processing with light impurity.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (8)
1. A construction waste treatment method is characterized by comprising the following steps:
the method comprises the following steps: conveying the construction waste into a primary screening device, removing small-size impurities in the construction waste, and forming first construction waste;
step two: conveying the first construction waste into a conveying belt, manually sorting the first construction waste to remove large-size impurities in the first construction waste and form second construction waste;
step three: sending the second construction waste into a primary crushing device for crushing treatment to form third construction waste;
step four: conveying the third construction waste into a conveying belt, wherein a magnetic separation device is arranged above the conveying belt, and magnetically separating the third construction waste to remove metal impurities in the third construction waste and form fourth construction waste;
step five: feeding fourth construction waste into a water washing flotation device, removing light impurities and soil in the fourth construction waste, and forming fifth construction waste, wherein the water washing flotation device comprises a water tank (1), a discharging conveying belt (2) is arranged in the water tank (1), a feeding hopper (3) is arranged on the left side of the water tank (1), a guide plate (4) inclining downwards is arranged on the left wall of the feeding hopper (3), a discharging opening (5) is formed between the bottom of the guide plate (4) and the right wall of the feeding hopper (3), an upward-inclining flushing water pipe (6) is arranged at the bottom of the left wall of the feeding hopper (3), and water columns sprayed by the flushing water pipe (6) are aligned to the discharging opening (5);
step six: conveying the fifth construction waste into an air separation device, removing light impurities in the fifth construction waste, and forming sixth construction waste;
step seven: drying the sixth construction waste;
step eight: sending the dried sixth construction waste into a secondary crushing device for crushing treatment to form seventh construction waste;
step nine: conveying the seventh construction waste into a conveying belt, wherein a magnetic separation device is arranged above the conveying belt, and performing magnetic separation treatment on the seventh construction waste to remove metal impurities in the seventh construction waste and form eighth construction waste;
step ten: conveying the eighth construction waste into a secondary screening device, sorting again through the secondary screening device, conveying the ninth construction waste passing through the secondary screening device back to the eighth step for crushing again until the ninth construction waste passes through the secondary screening device;
step eleven: and (4) conveying the ninth building garbage into a third-stage screening device, and removing small-size particles in the ninth building garbage again to form the recycled building aggregate.
2. The construction waste treatment method according to claim 1, characterized in that: and (4) performing water mist dust removal operation at a feed inlet of the first-stage crushing device in the third step.
3. The construction waste treatment method according to claim 1, characterized in that: the mesh opening of the first-stage screening device in the first step is 5mm, the mesh opening of the second-stage screening device in the tenth step is 40mm, and the mesh opening of the third-stage screening device in the eleventh step is 5 mm.
4. The construction waste treatment method according to claim 1, characterized in that: and the large-size impurities in the second step comprise metal impurities, plastic impurities, wood impurities and waste paper impurities.
5. The construction waste treatment method according to claim 1, characterized in that: and the first-stage crushing device in the third step is a jaw crusher, and the second-stage crushing device in the eighth step is a cone crusher.
6. The construction waste treatment method according to claim 1, characterized in that: and seventhly, drying the sixth construction waste by using high-temperature air, wherein the temperature of the high-temperature air is 300 ℃.
7. The construction waste treatment method according to claim 1, characterized in that: the water level of feeder hopper (3) is flushed with water conservancy diversion spray tube (7) that feeder hopper (3) antetheca is provided with water conservancy diversion spray tube (7).
8. The construction waste disposal method according to claim 7, wherein: the novel water-saving filter is characterized in that an overflow notch (8) is formed in the rear wall of the feeding hopper (3), the overflow notch (8) is connected with a water collecting tank (9), a filter screen (10) is arranged in the water collecting tank (9), and a sealing door plate is installed on the overflow notch (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010297752.4A CN111359770A (en) | 2020-04-16 | 2020-04-16 | Construction waste treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010297752.4A CN111359770A (en) | 2020-04-16 | 2020-04-16 | Construction waste treatment method |
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| CN111359770A true CN111359770A (en) | 2020-07-03 |
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| CN202010297752.4A Pending CN111359770A (en) | 2020-04-16 | 2020-04-16 | Construction waste treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112845198A (en) * | 2021-03-02 | 2021-05-28 | 上海睿聚环保科技有限公司 | Method for recycling and sorting waste and old sundry plastics |
| CN114535097A (en) * | 2022-03-04 | 2022-05-27 | 深圳市森蓝建设集团有限公司 | Construction waste classification treatment method and device |
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| JP2011050949A (en) * | 2009-08-04 | 2011-03-17 | Nippon Steel Engineering Co Ltd | Method for collecting and sorting garbage, device for collecting and sorting garbage |
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