WO2014089927A1

WO2014089927A1 - Construction waste co-extrusion harmless treatment system and method thereof

Info

Publication number: WO2014089927A1
Application number: PCT/CN2013/071153
Authority: WO
Inventors: 王珊珊; 黄海; 李昌; 陈建华; 崔北研; 王�华; 张同; 成川
Original assignee: 上海国砼环保设备有限公司
Priority date: 2012-12-13
Filing date: 2013-01-30
Publication date: 2014-06-19
Also published as: CN102974596A; CN102974596B

Abstract

A construction waste co-extrusion harmless treatment system and a method thereof in the technical field of construction waste treatment. The system comprises a primary extrusion crushing appliance (1). An output end of the primary extrusion crushing appliance (1) corresponds to an input end of a steel structure conveyor (2), an output end of the steel structure conveyor (2) corresponds to an input end of a primary impurity sorting conveyor (3), a primary magnetic separator (4) is arranged at the upper part of the primary impurity sorting conveyor (3), an input end and an output end of a secondary extrusion crushing appliance (5) respectively correspond to an output end of the primary impurity sorting conveyor (3) and an input end of a roller separating conveyor (6), an output end of the roller separating conveyor (6) corresponds to an input end of a secondary impurity sorting conveyor (7), and a secondary magnetic separator (8) is arranged at the upper part of the secondary impurity sorting conveyor (7). Extrusion crushing and tooth roller crushing two-stage co-extrusion crushing can be performed, so that construction waste concrete brittle materials can be crushed to separate fine reinforcement from concrete, but also excessive crushing of light and combustible soft materials can be avoided.

Description

Construction waste co-extrusion harmless treatment system and method thereof

Technical field

The invention relates to the technical field of comprehensive utilization of resources, in particular to a system and method for co-extrusion of construction waste combined extrusion. Background technique

The harmless treatment of construction waste in China is not a simple stone crushing. The harmless treatment of building construction waste in China involves three major problems: stripping metal, combustibles and soil. The harmless treatment of decorative building waste is more complicated. Practice shows that the disposal of construction waste in China must first solve the harmless treatment. The harmless treatment of construction waste in China requires the development of suitable harmless treatment equipment and processes according to the characteristics of construction waste in China and the need for recycling of construction waste.

About 10% of the building raw materials sand, stone and powder are used for roadbed materials, and 90% are converted into cement-based building materials such as cement, concrete, mortar and slab bricks. The development of the construction waste recycling industry, it is increasingly important to process construction waste into recycled materials that can be used in cement-based building materials. Recycled materials used in cement-based building materials should not contain metal, combustibles such as wood chips or fabrics, or soil, that is, metal, combustibles, and soil are harmful substances in recycled materials. The construction waste is processed into recycled materials suitable for use in cement-based building materials, and the harmless treatment of construction waste is the basis.

At present, China's construction waste recycling treatment enterprises deal with brick-concrete structure house construction waste, and basically do not realize the harmless treatment and purification treatment of construction waste. The treated reclaimed sand contains a certain amount of soil, and the treated regenerated bone The material contains a certain amount of wood chips and other debris, which makes the users of recycled materials discouraged.

With the vigorous development of China's construction waste recycling industry, construction waste disposal is developing in the direction of large-scale processing. The large-scale treatment of construction waste usually requires two-stage and two-step methods to realize resource and product processing, that is, construction of garbage innocuous treatment, construction waste recycling, and product processing. The key to the harmless treatment of construction waste is to solve the separation of debris. The key to the recycling of construction waste and product processing is to solve the separation of raw materials and clinker. The core of construction waste treatment is separation technology, in which the choice of grinding process is another key technology, which is related to the scientific separation of construction waste treatment. Practice has proved that the use of traditional smashing, counter-breaking and screening machine stone crushing line process to deal with brick-concrete construction waste, there are problems such as low disposal capacity of construction waste, unclean treatment, narrow adaptation of recycled materials.

The main architectural structures in the world include wood structures, brick and wood structures, brick-concrete structures, and concrete structures. Each country has a different building structure and different building materials. Construction waste composition is different, construction waste treatment Equipment and processing are also different. According to the announcement of the Political and Research Center of the Ministry of Housing and Urban-Rural Development, by 2030, China will dismantle 20 billion square meters of old buildings. Most of these old buildings were brick-concrete structures built before the 1990s, and a small number were concrete structures. That is to say, most of the construction waste discharged in China in the next 20 years is brick-concrete construction waste composed of sintered bricks and concrete. China's brick-concrete structure construction waste is characterized by more small steel bars, more light flammable materials such as wood blocks and fabrics, and more soil. To realize the recycling of construction waste, it is necessary to strip out the above three kinds of hybrids, realize harmless treatment, and prepare qualified construction waste.

Before the 1990s, China's economy was not developed enough, and the amount of steel used for building houses was small. One outstanding feature was the prevalence of prestressed slabs, prefabricated slabs for prefabricated slabs, and the use of fine reinforced concrete slabs, prestressed slabs and door and window lintels. Small steel bars are used more. The removal of these small steel bars is a special problem in the process of recycling construction waste in China. Long and thick steel bars, due to their high value, are usually removed on the spot by removing the commercial impact hammer at the demolition site. The small steel bars are usually not peeled off at the construction site.

The harmless treatment of construction waste is the pre-treatment of construction waste, that is, the preparation of raw materials that meet the recycling requirements of construction waste recycling, that is, the construction waste can be processed to meet the needs of the next process, namely, recycled aggregate, recycled sand, and recycled powder. Construction waste residue raw materials. That is to say, the construction waste is harmlessly treated, and it is necessary to satisfy the breaking of the large-component construction waste, and to meet the peeling of the small-member steel and concrete, and at the same time to separate the wood block, the soil and the like. That is to say, the construction waste is harmlessly treated, and it must satisfy the separation of coarse and medium crushed materials, as well as the distribution of mixed materials such as steel bars and wood blocks and soil.

At present, most of the construction waste recycling and recycling enterprises in China use the traditional stone crushing line technology to deal with construction waste. Traditional smashing and counter-attacking stone breaking lines combine with suitable crushed stone or crushed concrete, but the treatment of brick-concrete construction waste often fails to meet the needs. The problem of using bricks and smashing and counter-shocking to deal with brick-concrete construction waste is: First, smashing is a "crocodile mouth" type one-piece intermittent crushing, small steel bars and concrete can not be completely separated, broken prestressed floor slab concrete Intermittently wrapped in steel bars, magnetic separation equipment is difficult to adsorb and magnetically select fine steel bars wrapped in concrete. Manually sorted fine concrete bars wrapped in concrete require manual hammering to peel off concrete, which is very troublesome and inefficient. . That is, the first stage smashing and crushing is difficult to completely peel off the fine steel bars and concrete. Secondly, countering the impact pulverizer that belongs to the high-speed rotor impact and the inner lining counterattack, so the taboo material contains small long steel bars, because the small long steel bars will wrap around the rotor or the coarse steel bars will get stuck in the rotor, and at the same time, the high-speed rotating rotor Repeated impact on broken concrete and bricks also breaks wood and fabric into pieces, which makes it difficult to sort and separate light combustibles. The recycling of construction waste resources will result in the shutdown of the equipment in the next process, and the separation of the steel bars involves the production of deep waste processing equipment for construction waste. The separation of the mixed materials involves the quality of recycled materials.

In summary, in order to realize the recycling of construction waste in China, it is necessary to develop according to the characteristics of construction waste in China. Suitable processing techniques and equipment.

According to the patent technology search, there is no patent document related to the harmless treatment of construction waste combined extrusion. Summary of the invention

The primary object of the present invention is to overcome the deficiencies of the existing construction waste processing technology, thereby providing a construction waste co-extrusion harmless treatment system and method thereof.

The invention relates to a construction waste co-extrusion harmless treatment system, which comprises a first-stage crushing and crushing device, a steel structure conveyor, a first-level debris sorting conveyor and a first-order magnetic separation device, and a first-stage crushing and crushing device. The output end corresponds to the input end of the steel structure conveyor, the output end of the steel structure conveyor corresponds to the input end of the first-class debris sorting conveyor, and the first-stage magnetic separation equipment is arranged on the upper part of the first-stage debris sorting conveyor It also includes secondary crushing and crushing equipment, roller separation conveyor, secondary debris sorting conveyor and secondary magnetic separation equipment. The input and output of the secondary crushing and crushing equipment are respectively separated from the primary impurities. The output end of the picking conveyor corresponds to the input end of the roller separating conveyor, the output end of the roller separating conveyor corresponds to the input end of the secondary debris sorting conveyor, and the secondary magnetic sorting device is set in the secondary impurity part Pick the upper part of the conveyor.

The construction waste co-extrusion harmless treatment system further comprises a feeder, a first hopper, a dust collector and a control system, the output end of the first hopper corresponding to the input end of the feeder, the feeder The output end corresponds to the input end of the first-stage crushing and crushing equipment, and the control system is respectively combined with the first-stage crushing and crushing equipment, the steel structure conveyor, the first-level debris sorting conveyor, the first-level magnetic separation equipment, and the secondary crushing and crushing. The equipment, the roller separation conveyor, the secondary debris sorting conveyor, the secondary magnetic separation device and the dust collector are electrically connected, and the dust collector corresponds to the output of the secondary debris sorting conveyor.

The above-mentioned construction waste combined extrusion harmless treatment system, the first-stage crushing and crushing equipment in the construction waste pretreatment is a first-stage rough breaking, and the second-stage crushing and crushing equipment is a secondary broken or fine broken, first-level Both broken and secondary broken are crushed and crushed. Two crushing and crushing equipments are combined with crushing to achieve coarse crushing, medium crushing or fine crushing of construction waste pretreatment, and peeling off concrete on fine steel bars without making soft Light flammable materials such as wood blocks are broken, which is beneficial to division and separation.

The first-stage crushing and crushing device is a tooth roll crushing device or a jaw crushing and crushing device; the tooth roll crushing device is two tooth rolls with opposite teeth distributed on the opposite roller surface. Crusher. The tooth roll crushing and crushing device is advantageous for the biting material and the splitting and crushing material; the jaw crushing and crushing device is a smashing machine.

The first-stage crushing and crushing device is a tooth roll crushing and crushing device;

The secondary crushing and crushing device is a triangular toothed roller-to-roller crusher, a point-shaped toothed roller-to-roller crusher or a rough-faced roller crusher; The secondary crushing and crushing device is used for processing building construction waste, and adopts a triangular tooth-toothed roller-to-roll crusher; the secondary crushing and crushing device is used for processing decorative building waste, and adopts rough facing roller crushing. machine.

The triangular toothed roller-to-roller crusher is an improved toothed roller crusher. The improved toothed roller crusher distributes a plurality of longitudinal through-triangular straight teeth on the pair of roller rolls, and the running process of the pair of rollers The middle triangular straight teeth are bite. The structure is beneficial to the material, non-slip, avoiding the use of the roller, and is advantageous for squeezing and crushing the concrete wrapped on the fine steel bar, and making the small steel bar s-shaped to avoid the steel wire being wound on the roller.

The roll gap of the secondary crushing and crushing equipment can be adjusted, thereby realizing the construction waste slag of different particle sizes, so as to facilitate the subsequent deep processing equipment to meet the construction waste residue of different particle sizes, and process the construction waste into recycled coarse aggregate, Recycled fine aggregate and recycled powder.

The steel structure conveyor is a chain conveyor or a roller conveyor composed of a plurality of steel plates or steel pipes, and the steel structure conveyor is usually two meters in length and arranged at the lower part of the discharge port of the crushing crusher to improve transportation. Durability of the machine, avoiding the broken steel bars, irregular concrete broken and puncture broken by the crusher. The overall movement of the steel structure conveyor pulls the material forward, falls into the debris sorting conveyor and continues to manually sort the wood blocks, fabrics and other hybrids.

The input end of the first-stage debris sorting conveyor is lower than the output end of the steel structure conveyor, and the height difference between the input end of the first-stage debris sorting conveyor and the output end of the steel structure conveyor is about 10 The centimeter, the height difference of 10 cm is equivalent to a step, which is conducive to continuous delivery of the broken mixture.

The roller separation conveyor is a roller conveyor which is arranged in the lower part of the secondary extrusion crushing device and is composed of a plurality of metal pipes.

When handling building construction waste, the roller clearance of the roller separation conveyor is adjusted to 5-10mm _;

When handling decorative building waste, the roller gap of the roller separation conveyor is adjusted to 10-15 mm.

The roller gap of the roller separation conveyor is adjustable, and the lower part of the roller separation conveyor is provided with a hopper and a conveyor. The roller of the roller separation conveyor rotates and the overall movement is carried forward while pulling the recycled material, while the roller itself rotates.

The roller separation conveyor serves two purposes: 1) Durable. Because if it is a belt conveyor, it is easily damaged by small steel bars, so the roller conveyor can avoid the small steel bar to poke the roller conveyor; 2) When handling the building construction waste, the roller clearance is adjusted to 5-10mm, Used to separate the muck and the mixture; When handling the decoration construction waste, the roller clearance is adjusted to 10-15mm, which is used to separate the slag from the light combustibles.

The input end of the secondary debris sorting conveyor is lower than the output end of the roller separating conveyor, and the input end of the secondary debris sorting conveyor is lower than the output end of the roller separating conveyor by about 10 cm. The height difference of 10 cm is equivalent to a step, which facilitates continuous conveying of the broken mixture. The debris sorting conveyor may be a chain conveyor, a roller conveyor or a belt conveyor. The debris sorting conveyor is a wide, flat conveyor that facilitates the dilution of construction waste mixes and facilitates the manual sorting of wood, fabric and other hybrids.

The first-stage crushing and crushing equipment realizes cracking and breaking of large-scale construction waste. The secondary extrusion crushing device realizes the peeling of fine steel bars and concrete. The first-stage crushing and crushing equipment and the second-stage crushing and crushing equipment are combined and crushed to realize the breakage of construction waste and the stripping of steel and concrete, and the light combustibles such as wood blocks are not broken, which is advantageous for sorting.

When the crushed material passes through the roller separation conveyor, less than 5mm of sludge containing more mud is dropped from the roller 5-10mm gap into the second hopper, and the 5-10mm gap can be adjusted as needed. Output by the first belt conveyor; more than 5mm material forward and docking secondary debris sorting conveyor continuous operation, more than 5mm of more pure recycled materials are transported to the silo, or directly into the next process deep processing regeneration Aggregate, reclaimed sand, recycled powder, or as a material for water-stable road base materials, mixed with cement and lime to produce water-stable road-based materials, or used as construction wastes for harmless disposal for direct use in roads, foundation works and other filling materials. At present, construction waste has not been harmlessly treated as a roadbed and foundation engineering filler, leaving hidden engineering problems.

A method for treating construction waste in a harmless manner using the treatment system of the present invention is as follows: First step, feeding: Construction garbage truck or loader, pouring construction waste into the first hopper, passing the first The hopper enters the feeder, and the feeder feeds the construction waste into the first-stage crushing and crushing equipment;

The second step, the first grade coarse crushed construction waste: the first-stage crushing and crushing equipment squeezes, splits, breaks the construction waste, and breaks the construction waste to below 200mm;

The third step, the first-level separation of impurities: Construction waste is discharged from the lower outlet of the first-stage crushing and crushing equipment, and falls onto the steel structure conveyor. The steel structure conveyor conveys the coarsely broken mixture to the first-class debris sorting. On the conveyor, the first-level debris sorting conveyor conveys the mixture, the first-order magnetic separation equipment magnetically separates the steel bars, and manually sorts the impurities in the mixture on the first-stage debris sorting conveyor;

The fourth step, the second-level medium-breaking construction waste: secondary extrusion, cutting, crushing and coarse-breaking mixture of secondary crushing and crushing equipment, biting, crushing and peeling of the roller-toothed roller of the secondary crushing and crushing equipment Reinforcing the concrete; adjusting the gap between the two rollers of the secondary crushing and crushing equipment; when the secondary crushing equipment is crushed and crushed, the opening gap of the roller is greater than that of the secondary crushing and crushing equipment; Roller opening clearance; Step 5, secondary separation of impurities: When the construction waste that has been crushed by two extrusions passes through the roller separation conveyor, the dirt less than 5 mm falls from the roller of the roller separation conveyor by 5-10 mm. Entering the second hopper, output by the first belt conveyor; more than 5mm material is transported by the roller separation conveyor, falling into the secondary debris sorting and transporting Sending the machine, set the secondary magnetic separation equipment on the upper part of the second-level debris sorting conveyor to magnetically separate the steel bars, manually pick up the debris on the second-level debris sorting conveyor, and advance the materials, and transport the construction waste larger than 5mm to Silo or directly into the next process.

The beneficial effects of the invention:

1, the metal separation is relatively clean

The invention adopts two-stage co-extrusion crushing, and the second stage is crushing and crushing of the roller crusher, so that the steel bar and the concrete are peeled off relatively cleanly, and the problem that the intermittent extrusion and peeling of the separate jaw crushing and crushing equipment is not clean is avoided. It not only facilitates the recovery of steel bars, but also ensures the disposal of construction wastes in the next process, and the treatment of small steel bars to damage the equipment and achieve smooth production.

2, light combustibles are relatively clean

For roller crushing equipment, it belongs to static pressure equipment. The two-stage extrusion pulverization of the invention is beneficial to the stripping of steel bars and concrete, and the light flammable materials are not easily pulverized, which is advantageous for manual sorting of light combustibles such as wood blocks, woven bags and fabrics, and is sorted by two stages. Separation can basically guarantee the purity of the pre-treated building waste residue material, and provide a guarantee for the recycling of construction waste residue and the production of high-quality recycled aggregate, recycled sand and recycled powder.

3, the soil is relatively clean

The self-rotating roller conveyor continuously turns over the animal material. When the construction soil with a large soil content of less than 5 mm passes through the roller separation conveyor, it falls to the lower hopper to realize the soil separation, and the construction waste residue larger than 5 mm continues to enter the silo. It is simple and convenient, and efficient. Avoid the soil containing recycled materials, which is beneficial to ensure the quality of recycled materials.

The roller separation conveyor is dual-purpose, which not only transports the material but also separates the slag, reduces the sieving and sieving process of the sieving machine, and reduces the electromechanical consumption of the sieving.

4, the crushing ratio is large, which is conducive to improving the production capacity of the next process

Two crushing and crushing, the crushing ratio is larger than the single crushing crushing crushing ratio. In general, the construction wastes pretreated by the construction waste of this project are less than 50mm, and the construction waste is subjected to two pressing forces. The construction waste has cracks, which is beneficial to the downstream crushing equipment. Grinding capacity, so as to improve the capacity of construction waste recycling and reduce energy consumption.

5. Conducive to the classification and recycling of construction waste recycling materials

Extrusion pulverization and selective pulverization are prominent. The technical solution for treating concrete construction waste is beneficial to the separation of steel and concrete without crushing the stone, which is beneficial for recycling and reclaiming coarse aggregate; treating brick-concrete structure construction waste is beneficial to the separation of sintered brick and sand. When the squeezing force is applied to the mixed construction waste, the selective pulverization phenomenon occurs, that is, the squeezing force transmission, the high-strength material has a low extrusion strength material, the sand stone becomes the squeezing medium extruded sintered brick, concrete The medium stone can basically maintain the original particle size, and the broken brick is pulverized into smaller particles.

6, low noise, small amount of dust

Extrusion crushing belongs to static pressure crushing, which has less noise and less dust than the counter-shock impact, and dust and noise are easy to control.

7. Initial commercialization

The construction waste residue mixture prepared by the combined crushing and crushing process belongs to the construction waste residue mixture which is harmlessly treated, and can be directly used as a water stable road base material, and mixed with about 3% of cement to produce a water stable gravel road. Engineering Materials. The market price of water stabilized gravel roadbed materials is 80-120 yuan.

8, construction waste pretreatment energy saving

The technical waste pretreatment energy consumption of the construction scheme is less than 2kwh/t, and the power consumption cost is less than 2 yuan/ton. At the same time, there is crack inside the crushed construction waste material, which is beneficial to the back-end resource recycling treatment to improve production efficiency. Reduced energy consumption.

9, the discharge granularity is adjustable

According to the technical scheme of the invention, the gap between the broken and the roller is adjustable, and the 30-100 mm construction waste mixture can be produced according to the needs.

10, suitable for resource recycling and enterprise harmless treatment configuration

China's construction waste recycling enterprises, the harmless treatment of construction waste is the foundation. The separation of metal, combustibles and soil in construction waste is related to the smooth production of recycled enterprises and the quality of recycled building materials.

11. Harmless disposal of construction waste suitable for government specialization

The government's environmental protection project treats construction waste into construction waste and then sells it directly to units that need construction waste, or uses the unit to use deep closed module processing equipment for deep processing into recycled sand and recycled powder, which is also an effective way to recycle construction waste. . In this way, the government environmental protection project has a simple disposal process and reduced investment. DRAWINGS

Figure 1 is a block diagram of the connection of the present invention.

2 is a block diagram showing the connection of the control system of the present invention. detailed description

The invention will now be further described in conjunction with specific embodiments. It is to be understood that the following examples are merely illustrative of the invention and are not intended to limit the scope of the invention.

Example 1. Construction waste co-extrusion harmless treatment system for treating building construction waste As shown in FIG. 1, a construction waste co-extrusion harmless treatment system of the present invention comprises a first-stage crushing and crushing device 1, a steel structure conveyor 2, a first-stage debris sorting conveyor 3, and a first-order magnetic body. Selecting device 4, the output end of the first-stage crushing and crushing device 1 corresponds to the input end of the steel structure conveyor 2, and the output end of the steel structure conveyor 2 corresponds to the input end of the first-stage debris sorting conveyor 3, the primary magnetic The selecting device 4 is disposed on the upper part of the first-stage debris sorting conveyor 3, and further includes a secondary crushing and crushing device 5, a roller separating conveyor 6, a second-stage debris sorting conveyor 7, and a secondary magnetic separating device 8. The input end and the output end of the secondary crushing and crushing device 5 respectively correspond to the output end of the first-stage debris sorting conveyor 3 and the input end of the roller separating conveyor 6, and the output end of the roller separating conveyor 6 is The input end of the second-stage debris sorting conveyor 7 corresponds to the second magnetic sorting apparatus 8 disposed at the upper portion of the second-stage debris sorting conveyor 7.

The construction waste co-extrusion harmless treatment system further includes a feeder 9, a first hopper 10, a dust collector 15 and a control system 16, and an output end of the first hopper 10 corresponds to an input end of the feeder 9. The output end of the feeder 9 corresponds to the input end of the first-stage crushing and crushing device 1, and the control system 16 and the first-stage crushing and crushing device 1, the steel structure conveyor 2, and the first-level debris sorting conveyor 3 , primary magnetic separation equipment 4, secondary extrusion crushing equipment 5, roller separation conveyor 6, secondary debris sorting conveyor 7, secondary magnetic separation equipment 8 and dust collector 15 are electrically connected, dust collector 15 corresponds to the output of the secondary debris sorting conveyor 7.

The construction garbage co-extrusion harmless treatment system, the first-stage crushing and crushing equipment 1 in the construction waste pretreatment is a first-stage rough breaking, and the second-stage crushing and crushing equipment 5 is broken or finely broken in the second stage. The first-stage breaking and the second-stage breaking are crushing and crushing, and two crushing and crushing equipments are combined with crushing and crushing to realize the coarse crushing, medium crushing or fine crushing of the construction waste pretreatment, and peeling off the concrete on the fine steel bars without making the soft Light flammable materials such as wooden blocks are broken, which is beneficial to division and separation.

The first-stage crushing and crushing device 1 is a toothed roll crushing device or a jaw crushing and crushing device; the toothed roll crushing device is two toothed teeth distributed on opposite rolling rolls Roller crusher. The tooth roll crushing and crushing device is advantageous for the biting material and the splitting and crushing material; the jaw crushing and crushing device is a crushing machine.

The first-stage crushing and crushing device 1 is a tooth roll crushing and crushing device;

The secondary crushing and crushing device 5 is a triangular toothed roller to roller crusher, a point toothed toothed roller to roller crusher or a rough faced roller crusher;

The secondary crushing and crushing device 5 is used for processing building construction waste, and adopts a triangular toothed roller to roller crusher;

The triangular toothed roller-to-roller crusher is an improved toothed roller crusher. The improved toothed roller crusher distributes a plurality of longitudinal through-triangular straight teeth on the pair of roller rolls, and the running process of the pair of rollers The middle triangular straight teeth are bite. The structure is beneficial to the occlusion material, non-slip, avoiding the use of the roller, and facilitating the extrusion smashing. The concrete wrapped on the small steel bars makes the small steel bars s-shaped, avoiding the steel bars from being wound on the rollers.

The roll gap of the secondary crushing and crushing device 5 can be adjusted, thereby realizing the construction waste slag of different particle sizes, so as to facilitate the subsequent deep processing equipment to meet the construction waste of different particle sizes, and process the construction waste into recycled coarse aggregate. , recycled fine aggregate and recycled powder.

The steel structure conveyor 2 is a chain conveyor or a roller conveyor composed of a plurality of steel plates or steel pipes, and the steel structure conveyor 2, which is usually two meters in length, is disposed at the lower part of the discharge port of the crushing crusher, Improve the durability of the conveyor, avoid the broken steel bars, irregular concrete broken and puncture broken by the forced crushing crusher. The steel structure conveyor 2 moves integrally with the material, and falls into the debris sorting conveyor to continue to manually sort the wood blocks, fabrics and the like.

The input end of the first-stage debris sorting conveyor 3 is lower than the output end of the steel structure conveyor 2, the input end of the first-stage debris sorting conveyor 3 and the height lower than the output end of the steel structure conveyor 2 The difference is about 10 cm, and the height difference of 10 cm is equivalent to one step, which is conducive to continuous delivery of the broken mixture.

The roller separation conveyor 6 is a roller conveyor which is disposed at the lower portion of the secondary crushing and crushing device 5 and is composed of a plurality of metal pipes.

The roller gap of the roller separation conveyor 6 is adjustable, and the second hopper 12 and the second-stage debris sorting conveyor 7 are disposed at the lower portion of the roller separation conveyor 6. The roller of the roller separation conveyor 6 rotates and the overall movement pulls the recycled material forward while the roller itself rotates.

The roller separation conveyor 6 has two functions: 1) Durable. Because if it is a belt conveyor, it is easily damaged by small steel bars, so the roller conveyor can avoid the small steel bar to poke the roller conveyor; 2) When handling the building construction waste, the roller clearance is adjusted to 5-10mm, Used to separate the muck from the mixture.

The input end of the secondary debris sorting conveyor 7 is lower than the output end of the roller separating conveyor 6, and the input end of the secondary debris sorting conveyor 7 is lower than the output end of the roller separating conveyor 6. About 10 cm, the height difference of 10 cm is equivalent to a step, which facilitates the continuous delivery of the broken mixture.

The debris sorting conveyor may be a chain conveyor, a roller conveyor or a belt conveyor. The miscellaneous sorting conveyor is a wide, flat conveyor that facilitates the dilution of construction waste mixes and facilitates the manual sorting of wood, fabric and other hybrids.

The first-stage crushing and crushing device 1 realizes splitting and crushing of large-scale construction waste. The secondary crushing and crushing device 5 realizes peeling of fine steel bars and concrete. The first-stage crushing and crushing equipment 1 and the second-stage crushing and crushing equipment 5 are combined and crushed to realize the breaking of construction waste and the stripping of steel and concrete, and the light combustibles such as wood blocks are not broken, which is advantageous for sorting. . When the material crushed by two extrusions passes through the roller separation conveyor 6, the sludge having a larger mud content of less than 5 mm falls from the roller 5-10 mm gap into the muck recovery bin, and the 5-10 mm gap can be as needed. Adjustment, output by the first belt conveyor; more than 5mm material forward and docking secondary debris sorting conveyor 7 continuous operation, more than 5mm of more purified recycled materials are transported to the silo, or directly into the next lane Process deep processing of recycled aggregate, reclaimed sand, recycled powder, or as a material for water-stable road base materials, mixed with cement and lime to produce water-stable road base materials, or sold directly as harmless disposal of construction waste for roads, foundation works, etc. Filler. At present, construction waste has not been harmlessly treated as a subgrade and foundation engineering filler, leaving hidden engineering risks.

The construction waste co-extrusion harmless treatment system of the invention disposes 500,000 tons of construction waste annually, and the parameters of each equipment are as follows:

Embodiment 2: Method for harmlessly treating construction waste by using construction waste co-extrusion harmless treatment system As shown in FIG. 1 and FIG. 2, a construction waste combined crushing harmless treatment system of the present invention is harmless. The method of treating construction waste is as follows:

First step, feeding: construction garbage transporter or loader, the construction garbage transporter and loader are transported The conveying device 20, the transportation device 20 pours construction waste into the first hopper 10, enters the feeder 9 through the hopper, and the feeder 9 feeds the construction waste into the first-stage crushing and crushing device 1;

The second step, the first coarse crushing construction waste: First-stage crushing and crushing equipment 1 Extrusion, splitting, crushing construction waste, crushing construction waste to below 200mm;

The third step, the first-stage separation of the mixed materials: the construction waste is discharged from the lower outlet of the first-stage crushing and crushing device 1, and falls onto the steel structure conveyor 2, and the steel structure conveyor 2 conveys the coarsely broken mixture to the first stage. On the debris sorting conveyor 3, the first-level debris sorting conveyor 3 transports the mixed materials, the first-level magnetic separation equipment 4 magnetically separates the steel bars, and manually sorts the first-level debris sorting conveyor 3 in the mixture. Miscellaneous

The fourth step, the second-level broken construction waste: secondary extrusion crushing equipment 5 secondary extrusion, cutting, crushing coarsely broken mixture, secondary crushing equipment 5, the opposite roller triangular toothed bite, crushing and Stripping the fine steel on the concrete; Adjusting the gap between the two rolls of the secondary crushing and crushing equipment 5, the secondary crushing and crushing equipment 5 roll crushing the concrete construction waste when the roll gap is larger than the secondary crushing equipment 5 Roll crushing brick mixing When the construction waste is constructed, the gap between the rolls is opened;

The fifth step, the second-stage separation of the mixed materials: When the construction waste that has been crushed by two extrusions passes through the roller separation conveyor 6, the muck of less than 5 mm falls from the roller of the roller separation conveyor 6 by 5-10 mm into the first The two hoppers 12 are output by the first belt conveyor 13; the materials larger than 5 mm are conveyed by the roller separation conveyor 6 and fall into the second-level debris sorting conveyor 7, which is disposed on the second-level debris sorting conveyor Ί The upper secondary magnetic separation device 8 magnetically separates the steel bars, manually picks up the debris on the secondary debris sorting conveyor 7, and advances the materials, and the construction waste of more than 5 mm is transported to the silo or directly to the next process 14.

The two-stage combined crushing and crushing of the crushing and the toothed roller in the embodiment can not only break the brittle material of the construction waste concrete, but also peel off the fine steel bar and the concrete, and avoid the broken material of the light combustible soft material.

In the embodiment, the two oppositely rotating counter-roller crushing and crushing, the extruded construction garbage is continuously stressed, avoiding the smashing of the "one-in-one" condition, which is beneficial to the stripping of the steel and the concrete, and at the same time is light and flammable. The soft material is not too broken, which is good for sorting the mixture. Example 3

Construction waste co-extrusion harmless treatment system for treating decorative construction waste

As shown in Fig. 1, this embodiment differs from the embodiment 1 in that the secondary crushing and crushing apparatus 5 is a rough facing roller crusher.

When the roller separation conveyor 6 processes the decorative construction waste, the roller clearance is adjusted to 10-15 mm, Separation of slag and light combustibles.

When the system processes the decorative construction waste, a feeding device is disposed between the first-stage debris sorting conveyor 3 and the secondary crushing crushing device 5, and the feeding device is a rod feeding device, the rod The strip gap is 50mm.

In the treatment and decoration construction waste co-extrusion harmless treatment method, the decoration construction waste is crushed by the first-stage crushing and crushing device 1 for one-stage crushing, the crushed brick and the crushed concrete are crushed into small particles, and the wooden block, The fabric is crushed, and the first-stage debris sorting conveyor 3 manually sorts out wires, plastics and the like which are not suitable as fuel; and a feeding device is arranged on the upper part of the secondary crushing and crushing device 5, and the feeding device is a rod type , the bar gap is 50mm, the material of the first-stage crushing and crushing device 1 output less than 50mm enters the feeding device through the first-level debris sorting conveyor 3 and falls into the secondary crushing and crushing device 5 to be crushed, first-stage extrusion The material larger than 50mm output from the crushing equipment 1 enters the collecting bucket through the feeding device. The material smaller than 50mm is small particles mainly composed of broken bricks and crushed concrete, and the material larger than 50mm is mainly composed of combustible materials such as wood blocks.

The mixture of the secondary crushing and crushing equipment 5 enters the cage drum screen to separate the slag and combustible materials. The slag can be used as the raw material for the production of lightweight partition wall products such as recycled bricks and blocks, and has the characteristics of light weight and high strength. Combustibles can be compressed into cubes for use as fuel. Combustible materials such as wood blocks entering the collecting bucket can be directly packaged and compressed for use as fuel, or broken into scraps, separated by slag and then compressed to form a block for use as fuel.

The decontamination treatment of the decoration construction garbage adopts the technical scheme of the invention. Since the broken brick and the broken concrete are brittle materials, the combustible materials such as wood blocks and fabrics are soft materials, so the broken bricks and the crushed concrete are basically crushed by rolling. The blocks and fabrics are crushed by rolling and not broken.

This embodiment can solve the problem that the garbage disposal of the decoration buildings in various large and medium cities has been dealt with. Decorating buildings Garbage is characterized by small, small, and more complex ingredients. Decorating construction waste bricks and broken concrete are still the dominant ingredients. More than 90% by weight is broken bricks and broken concrete, but wood blocks, fabrics and other combustibles are significantly more than building construction waste. Therefore, the direction of the recycling of decorative construction waste is still to obtain broken bricks and crushed concrete waste. The stripped combustibles have a higher calorific value and can be used as fuel for cement production or as a combustible energy source for domestic waste power plants. The research results show that the combustible materials stripped from China's decorative construction waste are basically non-toxic, suitable for use as fuel for cement production or as a combustible energy source for domestic waste power plants.

The invention discloses a construction waste co-extrusion harmless treatment system and a method thereof in the technical field of construction waste treatment. The invention comprises a first-stage crushing and crushing device, the output end of the first-stage crushing and crushing device corresponds to the input end of the steel structure conveyor, and the output end of the steel structure conveyor corresponds to the input end of the first-stage debris sorting conveyor The first-stage magnetic separation device is arranged on the upper part of the first-stage debris sorting conveyor, and the input end and the output end of the secondary crushing and crushing device Corresponding to the output end of the first-stage debris sorting conveyor and the input end of the roller separating conveyor, the output end of the roller separating conveyor corresponds to the input end of the second-level debris sorting conveyor, and the secondary magnetic separating device It is placed on the upper part of the secondary debris sorting conveyor. The extrusion crushing and the toothed roller crushing and breaking two-stage combined crushing and crushing of the invention can not only meet the crushing of the brittle material of the construction waste concrete, but also peel off the fine steel bar and the concrete, and avoid the excessive crushing of the soft combustible soft material.

Claims

claims

1. A combined extrusion and harmless treatment system for construction waste, including a first-level extrusion and crushing equipment, a steel structure conveyor, a first-level debris sorting conveyor and a first-level magnetic separation equipment. The first-level extrusion and crushing equipment The output end corresponds to the input end of the steel structure conveyor, and the output end of the steel structure conveyor corresponds to the input end of the first-level debris sorting conveyor. The first-level magnetic separation equipment is installed on the upper part of the first-level debris sorting conveyor. It is characterized in that it also includes a secondary extrusion crushing equipment, a roller separation conveyor, a secondary debris sorting conveyor and a secondary magnetic separation equipment. The input end and output end of the secondary extrusion crushing equipment are respectively connected with the primary crushing equipment. The output end of the debris sorting conveyor corresponds to the input end of the roller separation conveyor, the output end of the roller separation conveyor corresponds to the input end of the secondary debris sorting conveyor, and the secondary magnetic separation equipment is set in the secondary The upper part of the debris sorting conveyor.

2. The construction waste combined extrusion harmless treatment system as claimed in claim 1, further comprising a feeder, a first hopper, a dust collector and a control system. The output end of the first hopper is connected to the feeder. The input end of the feeder corresponds to the input end of the first-level extrusion and crushing equipment, and the control system corresponds to the first-level extrusion and crushing equipment, the steel structure conveyor, and the first-level debris sorting conveyor. , primary magnetic separation equipment, secondary extrusion and crushing equipment, roller separation conveyor, secondary debris sorting conveyor, secondary magnetic separation equipment and dust collector are electrically connected, and the dust collector is electrically connected to the secondary debris sorter. Corresponds to the output end of the picking conveyor.

3. The construction waste combined extrusion and harmless treatment system according to claim 2, characterized in that the first-level extrusion and crushing equipment is a tooth roller extrusion and crushing equipment or a jaw plate extrusion and crushing equipment; The toothed roller extrusion crushing equipment is a toothed roller crusher with teeth distributed on the surface of two counter-rotating rollers; the jaw extrusion crushing equipment is a jaw crusher.

4. The construction waste combined extrusion harmless treatment system according to claim 3, characterized in that the first-level extrusion and crushing equipment is a toothed roller extrusion and crushing equipment;

The secondary extrusion crushing equipment is a triangular rack-toothed roller-to-roller crusher, a point-shaped toothed roller-to-roller crusher or a rough-faced roller crusher;

When the secondary extrusion crushing equipment is used to process house construction waste, a triangular rack-tooth roller-to-roller crusher is used; when the secondary extrusion crushing equipment is used to process decoration construction waste, a rough-faced roller crusher is used. machine; the triangular rack-toothed roller-to-roller crusher is an improved toothed roller crusher, and the improved toothed roller crusher The crusher has a number of vertical triangular straight teeth distributed on the roller surface.

5. The construction waste combined extrusion harmless treatment system according to claim 4, characterized in that the gap between the rollers of the secondary extrusion crushing equipment is adjustable.

6. The construction waste combined extrusion harmless treatment system according to claim 5, characterized in that the steel structure conveyor is a chain plate conveyor or a roller conveyor composed of several steel plates or steel pipes.

7. The construction waste combined extrusion harmless treatment system according to claim 6, characterized in that the input end of the first-level debris sorting conveyor is lower than the output end of the steel structure conveyor;

The input end of the secondary debris sorting conveyor is lower than the output end of the roller separation conveyor.

8. The construction waste combined extrusion harmless treatment system according to claim 7, characterized in that the roller separation conveyor is arranged at the lower part of the secondary extrusion crushing equipment and is composed of several metal pipes. shaft conveyor;

When the system handles house construction waste, the roller gap of the roller separation conveyor is adjusted to 5-10mm _;

When the system handles decoration construction waste, the roller gap of the roller separation conveyor is adjusted to 10-15mm.

9. A method for harmlessly treating construction waste using the treatment system described in any one of claims 1 to 8, characterized in that the steps are as follows:

The first step, feeding: The construction waste transport truck or loader pours the construction waste into the first hopper, and enters the feeder through the first hopper. The feeder sends the construction waste into the first-level extrusion and crushing equipment;

The second step, first-level coarse crushing of construction waste: the first-level extrusion and crushing equipment squeezes, splits and crushes the construction waste, and crushes the construction waste to less than 200mm;

The third step, first-level separation of mixed materials: Construction waste is discharged from the lower outlet of the first-level extrusion crushing equipment and falls onto the steel structure conveyor. The steel structure conveyor transports the coarsely broken mixture to the first-level debris sorting On the conveyor, the first-level debris sorting conveyor transports the mixed material, the first-level magnetic separation equipment magnetically separates the steel bars, and the mixture in the mixed material on the first-level debris sorting conveyor is manually sorted;

Step 4: Secondary secondary crushing construction waste: The secondary extrusion crushing equipment squeezes, cuts, and crushes the coarsely broken mixture. The triangular gear rollers of the secondary extrusion crushing equipment engage, crush, and peel off the fine particles. Add concrete to the steel bars; adjust the gap between the two rollers of the secondary extrusion crushing equipment. When the secondary extrusion crushing equipment rolls to crush concrete construction waste, The gap between the roller openings is larger than the gap between the roller openings when the secondary extrusion crushing equipment rolls and crushes brick-concrete structure construction waste; the fifth step, secondary separation of mixed materials: when the construction waste crushed by two extrusions passes through the roller separation conveyor , the dregs less than 5mm fall from the 5-10mm gap between the rollers of the roller separation conveyor and enter the second hopper, and are output by the first belt conveyor; the materials larger than 5mm are transported forward by the roller separation conveyor and fall into the second stage. Debris sorting conveyor, the secondary magnetic separation equipment installed on the upper part of the secondary debris sorting conveyor magnetically separates the steel bars, and the debris on the secondary debris sorting conveyor is manually picked, and the materials move forward, larger than 5mm The construction waste residue is transported to the silo or directly into the next process.