Construction waste light substance recycling and regenerative utilization production line and production method

Abstract

The application discloses a production line and a production method for recycling and regenerating construction waste light substance. The production line comprises a bouncing screen, two or more stages of tearing machines connected through a first belt conveyor on the downstream side of the bouncing screen, a sorting room arranged between the bouncing screen and the first stage of tearing machines, and the first belt conveyor penetrating through the sorting room; the tearing machines are connected through belt conveyors; a dry washing air selection system is arranged on the downstream side of the last stage of tearing machines; the dry washing air selection system comprises a dry washing machine, a discharge belt conveyor and a fan which are sequentially matched; a receiving belt conveyor is arranged on one side of the discharge end of the discharge belt conveyor; a separator of a water washing line is arranged on the downstream side of the receiving belt conveyor; the water washing line comprises a water circulation system and a separator, a flushing pool and a drum screen which are sequentially connected; the separator and the flushing pool and the drum screen are connected with the water circulation system in a matched mode. The application further discloses a production method. The application can solve the problem that pure plastic films are difficult to obtain in the prior art.

Description

TECHNICAL FIELD

[0001] The application relates to a building waste light substance recycling and regenerative utilization production line and a production method, and belongs to the technical field of building waste recycling. BACKGROUND

[0002] Building waste refers to waste generated in the construction, laying or demolishing or repairing process of various buildings, structures, pipe networks and the like by construction units or individuals. The building waste is divided into light substances and heavy substances. The light substance is relatively single in composition and mainly comprises plastic film. The heavy substance comprises large pieces of concrete, metal, stone, stone powder, sand and the like. In order to regenerate the plastic film in the building waste for building pipes, for oil refining and as RDF fuel, the building waste needs to be separated in composition.

[0003] However, in the technical field of building waste recycling, the conventional recycling treatment technology cannot obtain pure plastic film. That is, the recycling purity and recycling utilization rate of the plastic film are poor, and the plastic film obtained after separating the building waste often contains various unseparated attached pollutants such as silt and dust, which affects the economic benefits. SUMMARY

[0004] The application aims to provide a building waste light substance recycling and regenerative utilization production line and a production method, and solve the problem that the prior art cannot obtain pure plastic film.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows:

[0006] A building waste light substance recycling and regenerative utilization production line comprises a bounce screen, two or more stages of shredders connected with the downstream side of the bounce screen through a first belt conveyor, a sorting room arranged between the bounce screen and the first stage of shredders, and the first belt conveyor penetrating through the sorting room; the stages of shredders are connected through belt conveyors, and the last stage of shredders is connected with a dry washing and air separation system through a belt conveyor.

[0007] The dry washing and air separation system comprises a dry washing machine, a discharge belt conveyor and a fan, the feeding port of the dry washing machine is connected with the last stage of shredders through a belt conveyor, the feeding end of the discharge belt conveyor is arranged at the discharge port of the dry washing machine, the fan is arranged at one side of the discharge end of the discharge belt conveyor, a receiving belt conveyor for receiving materials blown out by the fan is arranged at one side of the discharge end of the discharge belt conveyor, and a water washing line is arranged at the downstream side of the receiving belt conveyor.

[0008] The water washing line comprises a water circulation system and a separator, a flushing pool and a drum screen connected in sequence, and the separator receives materials from the receiving belt conveyor.

[0009] The water circulation system comprises a collecting pool, an inclined net filter, a sedimentation pool, a sedimentation tank and a filter press connected in sequence, the sedimentation tank is connected with a medicine tank and a clean water pool respectively, the separator, the flushing pool and the drum screen are connected with the collecting pool through sewage pipes respectively, and the clean water pool is connected with the separator and the flushing pool through clean water pipes respectively.

[0010] Further, the inclined net filter comprises a fixed frame, an overflow groove arranged on the fixed frame, a filter screen arranged on the fixed frame in an inclined manner, and a water collecting pool arranged directly below the filter screen; the overflow groove is communicated with the collecting pool, the filter screen is arranged on one side of the overflow groove, and the water collecting pool is communicated with the sedimentation pool.

[0011] Further, the flushing pool comprises a pool body, a slope arranged at an end of the pool body, a chain plate mud scraper arranged in the pool body, and three or more stages of flushing water pipes arranged above the pool body; the pool body is connected with the collecting pool through a sewage pipe, one end of the chain plate mud scraper is arranged on the slope, the three or more stages of flushing water pipes are arranged along the length direction of the pool body at intervals, the flushing water pipes are connected with the clean water pool through clean water pipes, and the pool body has a side above the slope to receive materials separated from the separator.

[0012] Further, the sedimentation tank is provided with a collection box connected with the sedimentation pool and the medicine tank respectively, a sinking channel communicated with the collection box and extending to the bottom of the sedimentation tank, and overflow grooves communicated with the bottom of the sedimentation tank and the clean water pool respectively.

[0013] Further, the dry cleaning machine comprises a mounting frame, a dry cleaning cylinder and a driving device arranged on the mounting frame, a feeding port and a discharging port arranged at two ends of the dry cleaning cylinder, a spiral shaft arranged in the dry cleaning cylinder and connected with the driving device, a material falling port arranged at the bottom of the dry cleaning cylinder, and a dry cleaning screen arranged at the material falling port and leaving a gap between the spiral shaft.

[0014] Further, the sorting room comprises a room body, a plurality of sorting stations and / or sorting devices arranged in the room body, and a material bin arranged outside the room body and communicated with the bottom of the room body through a channel.

[0015] The plurality of sorting stations and / or sorting devices are arranged on the same side of the first belt conveyor, and the material bin is arranged on the other side of the first belt conveyor.

[0016] Based on the same inventive concept, the application further provides a production method for recycling and regenerating light substances of construction waste by using the production line, which comprises the following steps:

[0017] S1: send the construction waste to the bounce screen for pre-sorting, and select large pieces of concrete, metal, stone powder, sand and plastic film-containing materials;

[0018] S2: send the plastic film-containing materials to the sorting room through the first belt conveyor for further sorting, and select stones and metals;

[0019] S3: send the plastic film-containing materials after further sorting to the two-stage or more shredder for multi-stage shredding;

[0020] S4: send the plastic film-containing materials after multi-stage shredding to the dry washing and air separation system for further dry washing, beating and air separation, strip off the attached contaminants, and obtain wood chips, rubber and more pure plastic film-containing materials;

[0021] S5: send the plastic film-containing materials to the separator for impurity separation, send the sewage generated by the separation to the water circulation system for recycling, and provide clean water for the separation by the water circulation system;

[0022] S6: send the plastic film-containing materials after impurity separation to the washing pool for washing, send the sewage generated by the washing to the water circulation system for recycling, and provide clean water for the washing by the water circulation system;

[0023] S7: send the plastic film-containing materials after washing to the drum screen for dehydration and screening, and finally obtain pure plastic film, and send the removed sewage to the water circulation system for recycling.

[0024] Further, the sewage is sent to the water circulation system for recycling and the clean water is provided by the water circulation system, which includes the following steps:

[0025] S100: send the sewage to the collection pool for collection;

[0026] S200: send the collected sewage to the inclined screen filter for filtration, obtain plastic film and automatically collect it on the filter screen of the inclined screen filter, and at the same time, the filtered sewage falls into the water collection pool of the inclined screen filter for automatic collection;

[0027] S300: send the sewage in the water collection pool to the sedimentation tank for natural sedimentation and storage;

[0028] S400: send the sewage in the sedimentation tank and the reagent in the reagent tank to the sedimentation tank for chemical precipitation;

[0029] S500: send the clean water overflowing from the top of the sedimentation tank to the clean water pool, and provide clean water by the clean water pool, at the same time, send the sediment deposited at the bottom of the sedimentation tank to the filter press for pressure filtration and obtain mud cake;

[0030] S600: The sewage produced by the filter pressing is sent into a collecting pool.

[0031] Compared with the prior art, the present application has the following beneficial effects:

[0032] 1. The building waste light material recycling production line solves the problem that pure plastic film is difficult to obtain in the prior art, improves the recycling purity and recycling rate of the plastic film, and improves the production efficiency through "pre-separation by the bounce screen + separation by the separation room + multi-stage tearing by the two-stage or more tearing machines + dry washing and air separation by the dry washing and air separation system + water washing and water circulation by the water washing line".

[0033] 2. The building waste light material recycling production line realizes clean water circulation and sewage circulation, the circulating water supplement is less than or equal to 10% of the total water consumption, the water saving rate is greater than or equal to 90%, and the recycling rate of the clean water and the resource utilization rate of the sewage are improved through the setting of the water circulation system.

[0034] 3. The building waste light material recycling production line realizes further automatic collection of the plastic film in the sewage, improves the recycling rate of the plastic film, and improves the operation convenience and production efficiency through the setting of the inclined screen filter.

[0035] 4. The building waste light material recycling production line further improves the recycling purity of the plastic film through the setting of the integrated washing pool, and realizes automatic collection of the attached pollutants through the slope and the chain plate mud scraper.

[0036] 5. The building waste light material recycling production line is beneficial to stripping the attached pollutants, further improves the recycling purity of the plastic film, and improves the production efficiency through the setting of the dry washing machine.

[0037] 6. The building waste light material recycling production line reduces the distance of worker or equipment movement and improves the separation efficiency and operation convenience through the configuration of the single-side separation station and / or the separation equipment layout of the separation room and the opposite material bin, and the separation efficiency is improved by about 20% to 30% in combination with the closed environment of the separation room.

[0038] 7. The production method solves the problem that pure plastic film is difficult to obtain in the prior art, improves the recycling purity and recycling rate of the plastic film, and improves the production efficiency through "pre-separation + separation by the separation room + two-stage or more tearing + dry washing and air separation + water washing and water circulation". BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a process flow chart of an embodiment of the present application;

[0040] Figure 2 is a schematic diagram of a planar arrangement of an embodiment of the building waste recycling production line according to the invention;

[0041] Figure 3 is a schematic diagram of a perspective structure of the dry washing air separation system according to the invention;

[0042] Figure 4 is a schematic diagram of a perspective structure of the dry washing machine according to the invention;

[0043] Figure 5 is a schematic diagram of a bottom view structure of the dry washing machine according to the invention;

[0044] Figure 6 is a schematic diagram of a top view structure of the washing pool according to the invention;

[0045] Figure 7 is a schematic diagram of a perspective structure of the washing pool according to the invention without the washing water pipe;

[0046] Figure 8 is a schematic diagram of a front view structure of the washing pool according to the invention without the washing water pipe;

[0047] Figure 9 is a schematic diagram of a partial perspective structure of the water circulation system according to the invention;

[0048] Figure 10 is a schematic diagram of a perspective structure of the sedimentation tank according to the invention;

[0049] Figure 11 is a schematic diagram of a front view structure of the sorting room according to the invention;

[0050] Figure 12 is a schematic diagram of a sectional view structure of the sorting room according to the invention.

[0051] In the figure: 1, bounce screen; 2, sorting room; 3, first stage shredder; 4, second stage shredder; 5, dry washing and air separation system; 6, dry washing machine; 61, mounting rack; 62, dry washing cylinder; 63, driving device; 64, feeding port; 65, discharging port; 66, discharging port; 67, discharging belt conveyor; 7, discharging belt conveyor; 8, fan; 9, first packing machine; 10, receiving belt conveyor; 11, first belt conveyor; 12, water washing raw material yard; 13, vibrating feeder; 14, separator; 15, flushing pool; 151, pool body; 152, slope; 153, chain plate mud scraper; 154, flushing water pipe; 155, drain valve; 16, drum screen; 17, second packing machine; 18, collecting pool; 19, inclined screen filter; 191, fixed rack; 192, overflow tank; 193, collecting pool; 20, sedimentation tank; 21, sedimentation tank; 211, collecting box; 212, flow tank; 213, sinking channel; 214, overflow tank; 22, medicine tank; 23, stirring device; 24, clean water pool; 25, filter press; 26, house body; 27, silo. DETAILED DESCRIPTION

[0052] The application will be further described in detail below with reference to the accompanying drawings.

[0053] Example 1

[0054] Referring to Figures 1 to 12 , the embodiment provides a building waste light substance recycling and regenerative utilization production line. The production line comprises a bounce screen 1, a sorting room 2, two-stage shredders, a dry washing and air separation system 5, and a water washing line. The first belt conveyor 11 for receiving the product on the screen of the bounce screen 1 is arranged on the downstream side of the bounce screen 1. The first belt conveyor 11 penetrates the sorting room 2 and sends the material to the two-stage shredders. The two-stage shredders comprise a first stage shredder 3 and a second stage shredder 4 connected to each other by a belt conveyor. Referring to Figure 2 and Figure 3 , the dry washing and air separation system 5 comprises a dry washing machine 6, a discharging belt conveyor 7, and a fan 8. The feeding port 64 of the dry washing machine 6 is connected to the second stage shredder 4 by a belt conveyor. The feeding end of the discharging belt conveyor 7 is arranged at the discharging port 65 of the dry washing machine 6. The fan 8 is arranged below the discharging end of the discharging belt conveyor 7.

[0055] Referring to Figure 1 and Figure 2 , the water washing line comprises a water circulation system and a separator 14, a flushing pool 15, and a drum screen 16 connected in sequence. The separator 14 receives the material from the receiving belt conveyor 10. The separator 14, the flushing pool 15, and the drum screen 16 are respectively connected to the water circulation system by sewage pipes. The water circulation system is respectively connected to the separator 14 and the flushing pool 15 by clean water pipes. The drum screen 16 is connected to the second packing machine 17. Referring to Figure 1 , Figure 2 andFigure 9 The water circulation system comprises a collecting pool 18, an inclined net filter 19, a sedimentation pool 20, a sedimentation tank 21, a filter press 25 connected in sequence, wherein the sedimentation tank 21 is connected with a medicine tank 22 and a clean water pool 24 respectively, the separating machine 14 and the flushing pool 15 and the drum screen 16 are connected with the collecting pool 18 through sewage pipelines respectively, and the clean water pool 24 is connected with the separating machine 14 and the flushing pool 15 through clean water pipelines respectively.

[0056] Referring to Figure 2 The bounce screen 1 realizes pre-separation of construction waste through differences in specific gravity, shape and volume of the material. The bounce screen 1 comprises a support frame, a power device installed on the support frame, a crankshaft installed on the support frame and connected with the power device, and eight screen plates installed in the support frame and connected with the crankshaft. The screen plates are arranged obliquely, and a plurality of screen holes and sawteeth are arranged on the screen plates. The heavy substances on the screen plates can roll back and be recovered through the oblique arrangement of the screen plates. The power device drives the eccentric reciprocating operation of the crankshaft, and drives the eight screen plates to move up and down reciprocatingly in a staggered manner, so that the light substances on the screen plates can move upwards along the surface of the screen plates through the sawteeth on the screen plates. The bounce screen 1 adopts a conventional product purchased on the market, and the specification parameters are as follows: the overall size is 3300mm*8000mm*6500mm, the screen plate size is 5350mm*290mm, the screen plate material is 16Mn, the screen plate thickness is 5mm, the number of screen plates is 8, the screen hole diameter is 50mm, the crankshaft material is 42Cr, the crankshaft operation mode is eccentric reciprocating operation, the full-load running noise is less than 85 decibels, the frequency is 50Hz, the voltage is 380V, and the screening efficiency is greater than 95%.

[0057] In order to facilitate the collection of the material, a recovery bin can be arranged directly below the bottom end of the oblique screen plate of the bounce screen 1, and a collection bin can be arranged directly below the screen hole of the screen plate of the bounce screen 1.

[0058] Referring to Figure 2 , Figure 11 and Figure 12The sorting room 2 includes a house body 26, a plurality of sorting stations and / or sorting devices arranged in the house body 26, and a bin 27 arranged outside the house body 26 and in communication with the bottom of the house body 26 through a passage. The first belt conveyor 11 extends through the house body 26 to the feeding position of the first shredder 3, the plurality of sorting stations and / or sorting devices are arranged on the same side of the first belt conveyor 11, and the bin 27 is arranged on the other side of the first belt conveyor 11. The house body 26 is a square shed structure, which ensures that the working environment is closed to reduce noise and dust. By arranging the bin 27 outside, dust can be prevented from accumulating in the sorting room 2. In practice, four sorting stations can be arranged, and one worker is arranged at each sorting station. The stones, metals and the like leaked from the bounce screen 1 on the first belt conveyor 11 are further sorted by the sorting devices and / or the workers at the sorting stations, and the leaked materials are directly picked up from the first belt conveyor 11 and sent into the bin 27. In this way, by arranging the sorting stations and / or sorting devices on one side and arranging the bin 27 opposite to the sorting stations and / or sorting devices, the distance of moving the workers or devices is reduced, the sorting efficiency and operation convenience are improved, and the sorting efficiency is improved by about 20%-30% in combination with the closed environment of the sorting room 2.

[0059] To further improve the sorting and recycling efficiency, a metal detector or an X-ray sorting machine can be arranged in the house body 26 of the sorting room 2. The metal detector or the X-ray sorting machine can assist in identifying residual metals such as iron and aluminum, which reduces the sorting difficulty and further improves the sorting efficiency.

[0060] Referring to Figure 2 The first shredder 3 has a cutter width of 6 mm, and the second shredder 4 has a cutter width of 4 mm. By adopting a two-stage shredding process, the material is gradiently shredded from 6 mm to 4 mm, which can gradually reduce the size of the material, reduce the load of a single machine, avoid overload, make the particle size more uniform, and be beneficial to the dry washing and air cleaning of the subsequent dry washing and air cleaning system 5, and be beneficial to improving the separation accuracy and sorting efficiency of the plastic film, so that the purity and utilization rate of the recycled plastic film are higher. The first shredder 3 and the second shredder 4 are both conventional products purchased on the market, such as a double-shaft shredder with a power of 110 kW purchased from Zhongshan Chuangneng Environmental Protection Equipment Technology Co., Ltd. or Dongguan Saike Machinery Co., Ltd.

[0061] Referring to Figures 3 to 5The dry cleaning machine 6 comprises a mounting frame 61, a dry cleaning cylinder 62 and a driving device 63 arranged on the mounting frame 61, a feeding port 64 and a discharging port 65 arranged at two ends of the dry cleaning cylinder 62, a spiral shaft (not shown in the figure) arranged in the dry cleaning cylinder 62 and connected with the driving device 63, a discharging port 66 arranged at the bottom of the dry cleaning cylinder 62, and a dry cleaning screen (not shown in the figure) arranged at the discharging port 66 and leaving a gap between the spiral shaft. The spiral shaft is a rotating shaft with spiral blades. The operation process of the dry cleaning machine 6 is as follows: when the material enters the dry cleaning cylinder 62 from the feeding port 64, the driving device 63 drives the spiral shaft to rotate at high speed, the spiral shaft transports the material from the feeding port 64 to the discharging port 65, at the same time, the spiral blades on the spiral shaft beat the material (that is, dry cleaning), so as to strip the attached pollutants such as sand and dust on the material, and the stripped attached pollutants fall off from the dry cleaning screen, and the material cleaned by beating falls out of the discharging port 65.

[0062] By arranging the dry cleaning air separation system 5 after two-stage shredding, the attached pollutants can be fully separated from the plastic film, avoiding the following situations: before the front-end plastic film is fully shredded, the plastic film is intertwined with each other, and the large plastic film wraps the sand, causing the equipment to be stuck and blocked, affecting the operation of the equipment, and causing the sand to be unable to be separated, that is, the plastic film is difficult to be separated more purely and the separation efficiency is low, so that the high-quality tailings are selected together with the ordinary tailings, thereby affecting the economic benefit.

[0063] Referring to Figure 1 and Figure 3 , a first packing machine 9 for packing heavy materials is arranged directly below the discharging end of the discharging belt conveyor 7, a material receiving belt conveyor 10 for receiving the more pure plastic film-containing material blown out by the fan 8 is arranged directly in front of the discharging end of the discharging belt conveyor 7, and a discharging belt conveyor 67 integrally arranged on the mounting frame 61 is arranged directly below the bottom of the dry cleaning screen. Referring to Figure 1 and Figure 2, the water washing raw material yard 12 is provided downstream of the discharge end of the downstream side of the dry cleaning air separation system 5, i.e. the material receiving belt conveyor 10, and the vibrating feeder 13 is arranged at the water washing raw material yard 12, the vibrating feeder 13 being arranged upstream of the separator 14 of the water washing line, and the vibrating feeder 13 is used to realize uniform distribution of the material by vibration, to avoid blockage of the belt conveyor, and to preliminarily screen out small impurities such as slag. The vibrating feeder 13, the separator 14, the drum screen 16 and the second packing machine 17 are all conventional products purchased on the market. The separator 14 is used to further separate the plastic film from attached contaminants such as sand and labels; the structure of the separator 14 is similar to that of the dry cleaning machine 6; the beating unit in the separator 14 beats the material by rotating blades to strip the surface-attached contaminants, and the water washing unit in the separator 14 realizes separation of the impurities by high-pressure spraying (pressure ≥ 2 MPa) in combination with water flow flushing. The drum screen 16 has openings in the cylinder wall, and it realizes dehydration and spin-drying by centrifugal force, and the attached sand is taken away at the same time, to obtain pure plastic film, and the water content of the plastic film after spin-drying can be reduced to 15% to 20%. The plastic film after dehydration is packed by the second packing machine 17 to increase the density, to facilitate transportation or to be used as renewable raw materials such as RDF fuel and recycled plastic particles.

[0064] Referring to Figure 2 , Figure 6 , Figure 7 and Figure 8 , the flushing pool 15 comprises a pool body 151, a slope 152 arranged at the end of the pool body 151, a chain scraper 153 arranged in the pool body 151, and four-stage flushing water pipes 154 arranged above the pool body 151. The pool body 151 is a one-piece steel structure, and a drain valve 155 is arranged at the bottom of the pool body 151 and connected to the collection pool 18 through a sewage pipeline. One end of the chain scraper 153 is arranged on the slope 152; the chain scraper 153 comprises a driving mechanism connected to a driving sprocket arranged at the slope 152, a driven sprocket arranged at the other end of the pool body 151 away from the slope 152, a chain transmissionally connecting the driving sprocket and the driven sprocket, and a plurality of scrapers uniformly arranged on the chain at intervals. The four-stage flushing water pipes 154 are arranged at intervals along the length direction of the pool body 151, and the interval decreases from one end of the pool body 151 having the slope 152 to the other end. The flushing water pipes 154 are connected to the clean water pool 24 through a clean water pipeline. The end of the pool body 151 having the slope 152 receives the material separated from the separator 14. The material falls onto the slope 152 by gravity, and then moves to the other end of the pool body 151 from the slope 152, and is sequentially subjected to four-stage countercurrent flushing by the four-stage flushing water pipes 154 arranged above the pool body 151. The sewage after flushing at the bottom of the pool body 151 is discharged through the drain valve 155, and the attached contaminants flushed away at the bottom of the pool body 151 are scraped to the slope 152 by the chain scraper 153 and automatically collected.

[0065] Referring to Figure 2 and Figure 9 , the inclined screen filter 19 comprises a fixed frame 191 fixed on the ground, a water overflow tank 192 arranged on the fixed frame 191 and communicated with the collecting pool 18, a screen (not shown in the figure) arranged on the fixed frame 191 and arranged on one side of the water overflow tank 192, and a water collecting pool 193 arranged directly below the screen and communicated with the sedimentation pool 20. The sewage collected by the collecting pool 18 is pumped upward into the water overflow tank 192 through a pump and a pipeline. After the sewage in the water overflow tank 192 overflows, it flows downward along the screen. In the process of flowing, the sewage falls through the screen by gravity to be collected in the water collecting pool 193, while leaving residual plastic film on the surface of the screen. In this way, the sewage can be coarsely filtered, and the plastic film in the sewage can be automatically collected by gravity, thereby improving the operation convenience, production efficiency and recycling rate of the plastic film, and preventing the subsequent equipment from being blocked.

[0066] Referring to Figure 2 and Figure 10 , the sedimentation tank 21 is provided with a collection box 211 connected with the sedimentation pool 20 and the medicine tank 22 respectively, a subsidence passage 213 communicated with the collection box 211 through a flow tank 212 and extending to the bottom of the sedimentation tank 21, and an overflow tank 214 communicated with the bottom of the sedimentation tank 21 and the clean water pool 24 respectively. The sedimentation pool 20 is located below the sedimentation tank 21, or below the ground. The sewage in the sedimentation pool 20 and the medicament in the medicine tank 22 are pumped into the collection box 211 together, then flow to the subsidence passage 213 through the flow tank 212, and then gather and mix at the bottom of the sedimentation tank 21 to perform chemical sedimentation. After the sedimentation, the clean water overflows from above the overflow tank 214, and the sewage remains in the bottom of the sedimentation tank 21. Through the structural design of the sedimentation tank 21, the clean water and the sewage are completely separated, so that the obtained clean water is clearer and more in line with the recycling standard, and the problem that the clean water and the sewage are difficult to be completely separated in the prior art is solved.

[0067] Referring to Figure 2 , the medicine tank 22 is provided with a stirring device 23. The stirring device 23 comprises a stirring shaft arranged in the medicine tank 22 and a stirring motor connected with the stirring shaft and arranged on the medicine tank 22. The stirring device 23 is used to stir the medicament in the medicine tank 22 uniformly, so as to facilitate the mixing of the medicament and the sewage subsequently, and improve the removal rate of the suspended solids in the sewage. Figure 2 The filter press 25 adopts a purchased programmable diaphragm plate frame filter press 25, and the model is XMGZ / -U. The programmable diaphragm plate frame filter press 25 is used to press the sediment at the bottom of the sedimentation tank 21 into a mud cake. The effect of the programmable diaphragm plate frame filter press 25 on filtering the mud cake is good, and the water content of the mud cake can be greatly reduced.

[0068] Embodiment Two

[0069] Referring to Figure 1 The embodiment provides a production method for recycling and regenerating light substances of construction waste by using the production line for recycling and regenerating light substances of construction waste.

[0070] S1: The construction waste is loaded by a forklift to the bounce screen 1 for pre-sorting, and large concrete, metal, stone powder, sand and plastic film-containing materials are selected. The bounce screen 1 divides the construction waste into three categories: large-volume heavy materials such as large concrete or metal, which roll off the surface of the screen plate of the bounce screen 1 and are recycled to the recycling bin; small-volume fine materials such as stone powder or sand, which fall from the screen holes of the screen plate of the bounce screen 1 and are recycled to the collection bin; and the remaining plastic film-containing materials, which move upwards along the screen surface through the serrations on the screen plate of the bounce screen 1 and fall on the first belt conveyor 11.

[0071] S2: The first belt conveyor 11 sends the plastic film-containing materials to the sorting room 2 for sorting, and heavy materials such as stones and iron are selected and sent to the bin 27.

[0072] S3: The first belt conveyor 11 continues to send the sorted plastic film-containing materials to the first-stage shredder 3 for first-stage shredding, and then sends the first-stage shredded materials to the second-stage shredder 4 for second-stage shredding.

[0073] S4: The two-stage shredded materials are sent by the belt conveyor to the dry washing and air separation system 5 for dry washing, beating and air separation, to strip off the attached contaminants and obtain heavy materials and more pure plastic film-containing materials. The specific process is as follows: the belt conveyor sends the plastic film-containing materials from the feeding port 64 into the dry washing cylinder 62 of the dry washing machine 6, the dry washing machine 6 performs dry washing and beating on the materials and screens out the attached contaminants while sending the materials from the feeding port 64 to the discharging port 65, wherein the screened out attached contaminants such as sand fall onto the discharging belt conveyor 67 for recycling and processing elsewhere, and the materials from the discharging port 65 fall onto the feeding end of the discharging belt conveyor 7, which conveys the materials from the feeding end to the discharging end, and when the materials are conveyed to the discharging end, the heavy materials such as wood chips and rubber in the materials fall into the first packing machine 9 for packing, and the remaining more pure plastic film-containing materials are air-separated by the air blower 8 and fall into the receiving belt conveyor 10 for collection in the water washing raw material yard 12.

[0074] S5: The materials in the water washing raw material yard 12 are loaded by a forklift or a belt conveyor to the vibrating feeder 13, which uniformly feeds the materials to the separator 14 by a belt conveyor, and the materials are beaten and washed by the separator 14 for sufficient cleaning to separate impurities, wherein the sewage generated by the separation is sent to the water circulation system for recycling treatment, and the clean water required for the separation is provided by the water circulation system.

[0075] S6: The separated plastic film-containing material is sent into the flushing pool 15 by the belt conveyor for flushing, wherein the sewage generated by the flushing is sent into the water circulation system for recycling treatment, and the clean water required for the flushing is provided by the water circulation system.

[0076] S7: The flushed plastic film-containing material is sent into the drum screen 16 for dehydration and screening, and the tailings obtained after the dehydration, i.e., the pure plastic film, is sent into the second packing machine 17 for packing and storage, and the removed sewage is sent into the water circulation system for recycling treatment.

[0077] During the processes in the above steps S5 to S7, the recycling treatment of the sewage and the recycling provision of the clean water by the water circulation system are performed through the following steps:

[0078] S100: The sewage (i.e., the sewage generated by the separator 14, the flushing pool 15 and the drum screen 16) is sent into the collection pool 18 through the sewage pipeline for collection;

[0079] S200: The collected sewage is pumped and sent to the inclined screen filter 19 for filtration, during which the plastic film in the sewage is automatically collected on the filter screen of the inclined screen filter 19, and the remaining sewage falls from the filter screen into the water collection pool 193 of the inclined screen filter 19 for collection;

[0080] S300: The sewage in the water collection pool 193 is pumped and sent to the sedimentation pool 20 for preliminary natural sedimentation and storage;

[0081] S400: The sewage in the sedimentation pool 20 is pumped and sent to the sedimentation tank 21, and at the same time, the medicament in the medicament tank 22 after being stirred by the stirring device 23 is also pumped and sent to the sedimentation tank 21, so that the sewage is subjected to chemical sedimentation in the sedimentation tank 21 under the catalysis of the medicament;

[0082] S500: After the chemical sedimentation, the clean water overflows from the overflow groove 214 of the sedimentation tank 21 and enters the clean water pool 24 through the pipeline, the clean water pool 24 supplies the recycling clean water to the separator 14 and the flushing pool 15 through the clean water pipeline, and at the same time, the sediment such as sludge deposited at the bottom of the sedimentation tank 21 is pumped and sent to the filter press 25 for pressure filtration and to obtain the mud cake, which is sold as stone powder after drying;

[0083] S600: The sewage still containing impurities after the pressure filtration is continuously pumped and sent to the collection pool 18 for sewage recycling treatment.

[0084] The embodiments of the present application are described above with reference to the drawings, and the embodiments and features in the embodiments of the present application can be combined with each other in the case of no conflict. The present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are merely illustrative but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection scope of the present application.

Claims

1. A building waste light substance plastic film recycling and regenerative utilization production line, comprising a bouncing screen (1), characterized in that, The first belt conveyor (11) is connected with two or more stages of shredders downstream of the bounce screen (1), a sorting room (2) is arranged between the bounce screen (1) and the first stage of shredders (3), and the first belt conveyor (11) penetrates the sorting room (2); the stages of shredders are connected through belt conveyors, and the last stage of shredders is connected with a dry washing and air separation system (5) through a belt conveyor; The dry washing and air separation system (5) comprises a dry washing machine (6), a discharge belt conveyor (7) and a fan (8), the feeding port (64) of the dry washing machine (6) is connected with the last stage of shredders through a belt conveyor, the discharge port (65) of the dry washing machine (6) is provided with the feeding end of the discharge belt conveyor (7), the fan (8) is arranged on one side of the discharge end of the discharge belt conveyor (7), the discharge end of the discharge belt conveyor (7) is provided with a receiving belt conveyor (10) for receiving the material containing plastic film blown by the fan (8), and the downstream side of the receiving belt conveyor (10) is provided with a water washing line. The water washing line comprises a water circulation system and a separator (14), a washing pool (15) and a drum screen (16) connected in sequence, and the separator (14) receives the material from the receiving belt conveyor (10). The water circulation system comprises a collecting pool (18), an inclined screen filter (19), a sedimentation pool (20), a sedimentation tank (21), a filter press (25) connected in sequence, the sedimentation tank (21) is connected with a medicine tank (22) and a clean water pool (24) respectively, the separator (14), the washing pool (15) and the drum screen (16) are connected with the collecting pool (18) through sewage pipelines respectively, the clean water pool (24) is connected with the separator (14) and the washing pool (15) through clean water pipelines respectively, and the filter press (25) sends the sewage generated by pressure filtration into the collecting pool (18).

2. The construction waste light substance plastic film recycling and reusing production line according to claim 1, characterized in that, The inclined screen filter (19) comprises a fixed frame (191), an overflow groove (192) arranged on the fixed frame (191), an inclined filter screen arranged on the fixed frame (191), and a water collecting pool (193) arranged directly below the filter screen; the overflow groove (192) is communicated with the collecting pool (18), the filter screen is arranged on one side of the overflow groove (192), and the water collecting pool (193) is communicated with the sedimentation pool (20).

3. The construction waste light substance plastic film recycling and reusing production line according to claim 1, characterized in that, The washing pool (15) comprises a pool body (151), an inclined slope (152) arranged at the end of the pool body (151), a chain plate mud scraper (153) arranged in the pool body (151), and three or more stages of washing water pipes (154) arranged above the pool body (151); the pool body (151) is connected with the collecting pool (18) through a sewage pipeline, one end of the chain plate mud scraper (153) is arranged on the inclined slope (152), the three or more stages of washing water pipes (154) are arranged along the length direction of the pool body (151) at intervals, the washing water pipes (154) are connected with the clean water pool (24) through a clean water pipeline, and the pool body (151) is provided with the inclined slope (152) at one end and receives the material separated from the separator (14).

4. The construction waste light substance plastic film recycling and reusing production line according to claim 1, characterized in that, The sediment tank (21) is provided with a collection box (211) connected with the sediment tank (20) and the medicine tank (22) respectively, a subsidence channel (213) communicated with the collection box (211) and extending to the bottom of the sediment tank (21), and an overflow tank (214) communicated with the bottom of the sediment tank (21) and the clean water tank (24) respectively.

5. The construction waste light substance plastic film recycling and reusing production line according to claim 1, characterized in that, The dry cleaning machine (6) comprises a mounting rack (61), a dry cleaning cylinder (62) and a driving device (63) arranged on the mounting rack (61), an inlet (64) and an outlet (65) arranged at two ends of the dry cleaning cylinder (62), a spiral shaft arranged in the dry cleaning cylinder (62) and connected with the driving device (63), a discharging port (66) arranged at the bottom of the dry cleaning cylinder (62), and a dry cleaning screen arranged at the discharging port (66) and leaving a gap between the spiral shaft.

6. The construction waste light substance plastic film recycling and reusing production line according to any one of claims 1-5, characterized in that, The sorting room (2) comprises a house body (26), a plurality of sorting stations and / or sorting devices arranged in the house body (26), and a stock bin (27) arranged outside the house body (26) and communicated with the bottom of the house body (26) through a passage; The plurality of sorting stations and / or sorting devices are arranged on the same side of the first belt conveyor (11), and the stock bin (27) is arranged on the other side of the first belt conveyor (11).

7. A production method for recycling and reusing construction waste light substance plastic film by using the construction waste light substance plastic film recycling and reusing production line according to any one of claims 1-6, characterized in that, The method comprises the following steps: S1: sending the construction waste to the bounce screen (1) for pre-sorting to select large pieces of concrete, metal, stone powder, sand particles and plastic film-containing materials; S2: sending the plastic film-containing materials to the sorting room (2) through the first belt conveyor (11) for further sorting to select stones and metals; S3: sending the further sorted plastic film-containing materials to the two-stage or more shredder through the first belt conveyor (11) for multi-stage shredding; S4: sending the multi-stage shredded plastic film-containing materials to the dry cleaning and air separation system (5) for further dry cleaning, beating and air separation to strip off the attached contaminants and obtain wood chips, rubber and purer plastic film-containing materials; S5: sending the plastic film-containing materials to the separator (14) for impurity separation, sending the sewage generated in the separation to the water circulation system for recycling, and recycling the clean water required for the separation from the water circulation system; S6: sending the plastic film-containing materials after the impurity separation to the washing tank (15) for washing, sending the sewage generated in the washing to the water circulation system for recycling, and recycling the clean water required for the washing from the water circulation system; S7: sending the plastic film-containing materials after the washing to the drum screen (16) for dehydration and screening to obtain pure plastic film, and sending the separated sewage to the water circulation system for recycling.

8. The production method according to claim 7, characterized by, The sewage is sent to the water circulation system for recycling, and the clean water is recycled from the water circulation system, which comprises the following steps: S100: collecting the sewage in the collection tank (18). S200: The collected sewage is sent to the inclined screen filter (19) for filtration, and the plastic film is obtained and automatically collected on the screen of the inclined screen filter (19), while the filtered sewage falls into the water collecting tank (193) of the inclined screen filter (19) for automatic collection; S300: The sewage in the water collecting tank (193) is sent to the sedimentation tank (20) for natural sedimentation and storage; S400: The sewage in the sedimentation tank (20) and the reagent in the reagent tank (22) are sent to the sedimentation tank (21) for chemical precipitation; S500: The clear water overflowing from the top of the sedimentation tank (21) is sent to the clear water tank (24) for circulation and provision of clear water, and the sediment deposited at the bottom of the sedimentation tank (21) is sent to the filter press (25) for pressure filtration and to obtain mud cake; S600: The sewage produced by the pressure filtration is sent to the collecting tank (18).

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