A resource recycling system for wastewater and waste residue from precast concrete (PC) factories

Abstract

This utility model discloses a resource-based recycling system for wastewater and waste residue from a precast concrete (PC) plant, comprising a discharge hopper, a feeder, a fine sand recovery machine, and a sand and gravel silo. The discharge hopper carries residual material from the PC production line hoppers; the feeder carries waste material from tank trucks; the fine sand recovery machine performs secondary solid-liquid treatment on the residual material from the PC production line hoppers and the waste material from the tank trucks; the sand and gravel silo holds the treated sand and gravel. A first processing branch is formed between the discharge hopper and the sand and gravel silo; a second processing branch is formed between the feeder and the sand and gravel silo. The first processing branch is used for resource-based treatment of the residual material from the PC production line hoppers; the second processing branch is used for resource-based treatment of the waste material from the tank trucks. Installing this wastewater treatment system on-site enables graded treatment at the process level, effectively solving aggregate separation, fine sand recovery, wastewater recycling, and resource-based recycling of waste residue.

Description

Technical Field

[0001] This utility model relates to the field of wastewater recycling and waste residue resource utilization technology, specifically a wastewater and waste residue resource utilization system for PC prefabrication plants. Background Technology

[0002] With the deepening of the circular economy concept and the improvement of environmental regulations, the industry's demand for the resource utilization of PC wastewater and waste residue is becoming increasingly urgent. Currently, traditional treatment methods such as natural sedimentation, simple landfill, or open-air dumping are not only inefficient and wasteful of resources, but may also cause dust and secondary pollution of the filtrate. To protect the environment, wastewater generated from cleaning PC waste, tanker waste, waste materials, site wastewater, wastewater from cleaning conveying equipment, and other wastewater from mixing plants must undergo systematic treatment to recover usable resources. Wastewater must be treated before discharge or reuse. Therefore, wastewater treatment systems have become indispensable equipment in precast concrete mixing plants. After each feeding, some residual concrete will inevitably remain in the hopper or tanker, and cleaning will inevitably generate mortar. Furthermore, precast concrete mixing plants produce some substandard concrete for various reasons, which will also generate a large amount of mortar during cleaning. Wastewater will also be generated during the cleaning and rinsing of the mixing plant site from waste collected from other areas within the precast concrete mixing plant. All of these wastewaters must be treated by a wastewater treatment system to achieve resource recycling and reuse. In order to conserve resources, protect the environment, and achieve sustainable economic development, a wastewater treatment system suitable for all precast concrete mixing plants has been invented, which effectively solves the above problems. Utility Model Content

[0003] To address one of the shortcomings of existing technologies, this utility model provides a resource-based recycling system for wastewater and waste residue from PC precast plants; it solves the problems of excessive discharge of various waste materials and mortar water at precast concrete mixing plants, environmental pollution, and limited site availability, and realizes the recycling of lightweight aggregates and fine sand, as well as the resource-based recycling of wastewater and waste residue.

[0004] The PC precast plant wastewater and waste residue recycling system of this application is an essential product for precast concrete mixing plants. It is mainly used for the treatment of wastewater generated from cleaning PC waste, tank truck waste, wastewater, site wastewater, wastewater from cleaning conveying equipment, and other wastewater in the mixing plant, so as to recover lightweight aggregates and fine sand, and realize the recycling of wastewater and the recycling of waste residue.

[0005] This application provides a system that can separate aggregates from waste, recover fine sand, recycle wastewater, and reuse the waste after effective treatment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a system for the resource utilization of wastewater and waste residue from a precast concrete (PC) factory, comprising:

[0007] The unloading hopper is used to hold the remaining material transferred from the hopper in the PC production line;

[0008] A feeder is used to carry waste materials transported by tank trucks;

[0009] Fine sand recovery machine is used for secondary solid-liquid treatment of residual material in the hopper of PC production line and waste material in tank truck;

[0010] Sand and gravel bins are used to store processed sand and gravel.

[0011] The unloading hopper and the sand and gravel bin form a first processing branch; the feeder and the sand and gravel bin form a second processing branch;

[0012] The first processing branch is used to process the remaining material in the hopper of the PC production line for resource recovery.

[0013] The second processing branch is used for the resource recovery of waste materials inside the tanker.

[0014] Preferably, the first processing branch further includes:

[0015] A sludge scraper is installed below the discharge hopper, with its inlet corresponding to the outlet of the discharge hopper; it is used to perform solid-liquid separation on the waste material transported by the discharge hopper.

[0016] A bar screen is used to transport solid plastic particles separated by a scraper to a lightweight aggregate workshop for recycling.

[0017] Preferably, the first processing branch further includes a mixing tank, a mixing vessel, a filter press, and a clarification tank;

[0018] The mixing tank is connected to the fine sand recovery machine via pipelines; water pumps are respectively installed between the mixing tank and the mixing vessel, and between the mixing vessel and the filter press;

[0019] The inlet of the clarification tank is connected to the filter press. The clarification tank has two outlets; one outlet is connected to the fine sand recovery machine through a pipeline; the other outlet is connected to the second treatment branch through a pipeline.

[0020] Preferably, the first processing branch further includes a soil pulverizer;

[0021] Belt conveyors are installed between the pulverizer and the filter press, and between the pulverizer and the sand and gravel bin. The dewatered waste residue after filtration by the filter press is transported to the pulverizer via the belt conveyors.

[0022] The sand and gravel bin is used to hold the waste residue broken up by the pulverizer and transported by the belt conveyor, as well as the waste material processed by the second processing branch.

[0023] Preferably, the second processing branch further includes:

[0024] A mud-stone separator is located below the feeder, and the outlet of the feeder is connected to the inlet of the mud-stone separator; the mud-stone separator has two outlets.

[0025] The box-type crusher is connected to one of the discharge ports of the mud-stone separator and is used to crush the large particles of waste conveyed by the mud-stone separator into small particles of waste with a preset particle size.

[0026] The vibrating screen is connected to another discharge port of the mud-stone separator and is used to process the wastewater and small particulate waste conveyed by the mud-stone separator. The feed port of the vibrating screen is also connected to the clarification water tank of the first processing branch.

[0027] Preferably, the second processing branch further includes:

[0028] A conical pool is located on one side of the vibrating screen and is used to hold the wastewater from the vibrating screen. A water pump is also installed in the conical pool to transport the wastewater to the fine sand recovery machine.

[0029] Preferably, it also includes a bucket elevator, which is located on one side of the sand and gravel bin and is used to lift the waste material processed by the fine sand recovery machine, vibrating screen and box crusher to the sand and gravel bin.

[0030] Preferably, it also includes a belt conveyor B; the belt conveyor B is located between the fine sand recovery machine, the vibrating screen, the box crusher and the sand and gravel bin, and is used to integrate the waste materials processed by the fine sand recovery machine, the vibrating screen and the box crusher.

[0031] Preferably, it also includes a belt conveyor C, which is located between the vibrating screen and the belt conveyor B, for conveying the small particle waste material screened by the vibrating screen to the belt conveyor C.

[0032] Preferably, a belt conveyor is provided between the fine sand recovery machine, the box crusher and belt conveyor B.

[0033] Compared with existing technologies, this system has the following advantages: Due to the large volume, complex composition, high concentration, and difficulty in controlling the wastewater generated during the production process of general precast concrete mixing plants, as well as the ineffective utilization of lightweight aggregates and fine sand in the waste and the limited construction site, the installation of this wastewater treatment system on site can achieve graded treatment in the process, effectively solve the problems of aggregate separation, fine sand recovery, wastewater recycling, and resource reuse of waste residue. Attached Figure Description

[0034] Figure 1 This is an overall schematic diagram of an embodiment of this application;

[0035] Figure 2This is a flowchart illustrating the reuse system according to an embodiment of this application.

[0036] In the picture:

[0037] Diagram: 1. Unloading hopper, 2. Sludge scraper, 3. Bar screen, 4. Lightweight aggregate workshop, 5. Water pump A, 6. Fine sand recovery machine, 7. Belt conveyor A, 8. Belt conveyor B, 9. Conical tank, 10. Feeder, 11. Mud-stone separator, 12. Vibrating screen, 13. Box crusher, 14. Belt conveyor C, 15. Belt conveyor D, 16. Bucket elevator, 17. Sand and gravel silo, 18. Mixing tank, 19. Water pump B, 20. Mixing tank, 21. Mixing device, 22. Water pump C, 23. Filter press, 24. Belt conveyor E, 25. Pulverizer, 26. Clarifying tank, 27. Water pump D, 28. Water pump E, 29. Water pump F, 30. Water pump G, 31. Control cabinet. Detailed Implementation

[0038] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] Please see Figures 1-2 This application provides the following technical solutions:

[0040] A system for the resource recycling of wastewater and waste residue from a precast concrete (PC) plant includes a discharge hopper 1, a feeder 10, a fine sand recovery machine 6, and a sand and gravel bin 17.

[0041] In specific implementation, the unloading hopper 1 is used to carry the residual material from the hopper of the PC production line; the feeder 10 is used to carry the waste material from the tank truck; and the fine sand recovery machine 6 is used to perform secondary solid-liquid treatment on the residual material from the hopper of the PC production line and the waste material in the tank truck.

[0042] The sand and gravel bin 17 is used to hold the processed sand and gravel; the unloading hopper 1 and the sand and gravel bin 17 form a first processing branch; the feeder 10 and the sand and gravel bin 17 form a second processing branch; the first processing branch is used to process the remaining material in the hopper of the PC production line for resource utilization; the second processing branch is used to process the waste material in the tank truck for resource utilization.

[0043] Based on the above scheme, the first processing branch also includes a sludge scraper 2 and a bar screen 3.

[0044] The scraper 2 is located below the unloading hopper 1, and the feed inlet of the scraper 2 is corresponding to the discharge outlet of the unloading hopper 1; it is used to perform solid-liquid separation on the waste material conveyed by the unloading hopper 1; the bar screen 3 is used to transport the solid plastic particles separated by the scraper 2 to the lightweight aggregate workshop 4 for recycling.

[0045] In practice, the wastewater separated by the sludge scraper 2 is transported to the fine sand recovery machine 6 by the water pump A5. Specifically, the water pump A5 is installed at the bottom of one side of the sludge scraper 2.

[0046] Based on the above scheme, the first treatment branch also includes a mixing tank 18, a mixing vessel 20, a filter press 23, and a clarification tank 26; the mixing tank 18 is connected to the fine sand recovery machine 6 through a pipeline; water pumps are respectively installed between the mixing tank 18 and the mixing vessel 20, and between the mixing vessel 20 and the filter press 23; the inlet of the clarification tank 26 is connected to the filter press 23; the clarification tank 26 is provided with two outlets; one outlet is connected to the fine sand recovery machine 6 through a pipeline; the other outlet is connected to the second treatment branch through a pipeline.

[0047] A water pump B19 is located between the mixing tank 18 and the mixing vessel 20, and a water pump D27 is located between the mixing vessel 20 and the filter press 23.

[0048] Based on the above scheme, the first processing branch also includes a soil silage machine 25;

[0049] Belt conveyors are installed between the pulverizer 25 and the filter press 23, and between the pulverizer 25 and the sand and gravel bin 17, respectively, to transport the dewatered waste residue after filtration by the filter press 23 to the pulverizer 25.

[0050] The sand and gravel bin 17 is used to hold the waste residue broken up by the pulverizer 25 conveyed by the belt conveyor, as well as the waste material processed by the second processing branch.

[0051] Based on the above scheme, the second processing branch also includes a mud-stone separator 11, a box crusher 13, and a box crusher 13.

[0052] The mud-stone separator 11 is located below the feeder 10, and the outlet of the feeder 10 is connected to the inlet of the mud-stone separator 11. The mud-stone separator 11 has two outlets. The box crusher 13 is connected to one of the outlets of the mud-stone separator 11 and is used to crush the large particles of waste conveyed by the mud-stone separator 11 into small particles of waste with a preset particle size. The vibrating screen 12 is connected to the other outlet of the mud-stone separator 11 and is used to treat the wastewater and small particles of waste conveyed by the mud-stone separator 11. The inlet of the vibrating screen 12 is also connected to the clarification tank 26 of the first treatment branch.

[0053] Based on the above scheme, the second processing branch also includes a conical pool 9.

[0054] A conical pool 9 is located on one side of the vibrating screen 12 and is used to hold the wastewater screened by the vibrating screen 12. A water pump is also installed in the conical pool 9 to transport the wastewater from the conical pool 9 to the fine sand recovery machine 6.

[0055] Based on the above scheme, a bucket elevator 16 is also included. The bucket elevator 16 is set on one side of the sand and gravel bin 17 and is used to lift the waste material processed by the fine sand recovery machine 6, the vibrating screen 12 and the box crusher 13 to the sand and gravel bin 17.

[0056] Based on the above scheme, a belt conveyor B is also included; the belt conveyor B is set between the fine sand recovery machine 6, the vibrating screen 12, the box crusher 13 and the sand and gravel bin 17, and is used to integrate the waste materials processed by the fine sand recovery machine 6, the vibrating screen 12 and the box crusher 13.

[0057] Based on the above scheme, a belt conveyor C is also included, which is set between the vibrating screen 12 and the belt conveyor B, and is used to transport the small particle waste material screened by the vibrating screen 12 to the belt conveyor C.

[0058] Based on the above scheme, belt conveyors are respectively installed between the fine sand recovery machine 6, the box crusher 13 and the belt conveyor B.

[0059] In practice, the devices in this system can be arranged in two layers, with the unloading hopper 1, feeder 10, mixing tank 20, mixing device 21, filter press 23, belt conveyor E24, pulverizer 25, water pump C27 and control cabinet 31 located above ground, and the rest located underground.

[0060] This system is divided into two branches: one branch processes PC waste, and the other branch processes tanker waste and wastewater from the factory.

[0061] The specific working principle is as follows:

[0062] When cleaning PC waste, the hopper of the PC production line containing residual material stops at a designated position above the unloading hopper 1. The operator adds water to the hopper. After adding water, the operator pours the waste from the tanker into the unloading hopper 1, which then flows into the scraper 2 below. The plastic cleaned by the scraper is conveyed to the lightweight aggregate workshop 4 via the bar screen 3. The remaining wastewater is conveyed to the fine sand recovery machine 6 via the bottom water pump A5 on one side of the scraper 2. After screening, the sand falls into the hopper via the belt conveyor A7, and then is conveyed to the bucket of the bucket elevator 16 via the belt conveyor B8, and lifted to the sand and gravel silo on the ground. The wastewater after removing the sand enters the underground mixing tank 18 through pipelines. A water pump B19 is installed at the bottom of the mixing tank to pump the wastewater into the above-ground mixing tank 20. The mixing tank 20 is equipped with a stirring device 21. After intermittent stirring, the homogenized wastewater is pumped into the filter press 23 via the water pump C22 on one side of the bottom of the mixing tank 20. After pressure filtration, the waste material becomes filter cake, which falls into the hopper of the belt conveyor E24 below and is then transported to the pulverizer 25. After crushing, the material with low moisture content and high dispersion falls into the sand and gravel bin 17. The filtered water enters the clarification tank 26 through pipeline.

[0063] When cleaning tanker truck waste, the tanker truck stops at the designated washing position, water is added to the inside of the tanker truck, and after the washing is completed, the waste is unloaded onto the feeder 10 on one side and then conveyed to the mud and stone separator 11 below. After screening, large pieces of waste enter the box crusher 13 on one side below, while small pieces of waste and wastewater enter the vibrating screen 12 on the other side below. The large pieces of waste are crushed into compliant sizes by the box crusher 13 and then conveyed to the hopper of the belt conveyor D15 below. The small pieces of waste are dewatered by the vibrating screen and then enter the belt conveyor C14 below, and then conveyed to the hopper of the belt conveyor B8. The remaining wastewater flows into the conical pool 9 on the side through the drainage ditch. A water pump C22 is installed in the pool to pump the wastewater into the fine sand recovery machine. After screening, the sand falls into the hopper of the belt conveyor A7, and then is conveyed to the bucket of the bucket elevator 16 by the belt conveyor B8, and lifted to the sand and gravel silo on the ground. The wastewater after sand removal enters the underground mixing tank 18 through pipelines. A water pump B19 is installed at the bottom of the mixing tank to pump the wastewater into the above-ground mixing tank 20, which then enters the above-mentioned circulation. Water pumps E28, F29, and G30 are installed in the clarification tank 26 to provide water for rinsing the mud-stone separator 11, the fine sand recovery machine 6, and the vibrating screen 12, respectively.

[0064] The entire system is controlled by the control system in the electrical control cabinet 31.

[0065] This system can fully automate the separation of precast concrete waste from on-site wastewater treatment, enabling aggregate and fine sand recycling, thus achieving resource reuse. Furthermore, the recycling of wastewater aligns perfectly with the environmental protection concept of resource conservation, making this system an indispensable environmentally friendly product for precast concrete mixing plants.

[0066] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0067] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0068] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0069] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0070] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0071] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A system for the resource utilization and reuse of wastewater and waste residue from a precast concrete (PC) factory, characterized in that, include: The unloading hopper is used to hold the remaining material transferred from the hopper in the PC production line; A feeder is used to carry waste materials transported by tank trucks; Fine sand recovery machine is used for secondary solid-liquid treatment of residual material in the hopper of PC production line and waste material in tank truck; Sand and gravel bins are used to store processed sand and gravel. The unloading hopper and the sand and gravel bin form a first processing branch; the feeder and the sand and gravel bin form a second processing branch; The first processing branch is used to process the remaining material in the hopper of the PC production line for resource recovery. The second processing branch is used for the resource recovery of waste materials inside the tanker.

2. The PC prefabrication plant wastewater and waste residue resource recycling system as described in claim 1, characterized in that, The first processing branch also includes: A sludge scraper is installed below the discharge hopper, with its inlet corresponding to the outlet of the discharge hopper; it is used to perform solid-liquid separation on the waste material transported by the discharge hopper. A bar screen is used to transport solid plastic particles separated by a scraper to a lightweight aggregate workshop for recycling.

3. The PC prefabrication plant wastewater and waste residue resource recycling system as described in claim 2, characterized in that, The first processing branch also includes a mixing tank, a mixing vessel, a filter press, and a clarification tank; The mixing tank is connected to the fine sand recovery machine via pipelines; water pumps are respectively installed between the mixing tank and the mixing vessel, and between the mixing vessel and the filter press; The inlet of the clarification tank is connected to the filter press. The clarification tank has two outlets; one outlet is connected to the fine sand recovery machine through a pipeline; the other outlet is connected to the second treatment branch through a pipeline.

4. The PC prefabrication plant wastewater and waste residue resource recycling system as described in claim 3, characterized in that, The first processing branch also includes a soil silage machine; Belt conveyors are installed between the pulverizer and the filter press, and between the pulverizer and the sand and gravel bin. The dewatered waste residue after filtration by the filter press is transported to the pulverizer via the belt conveyors. The sand and gravel bin is used to hold the waste residue broken up by the pulverizer and transported by the belt conveyor, as well as the waste material processed by the second processing branch.

5. The PC prefabrication plant wastewater and waste residue resource recycling system as described in claim 1, characterized in that, The second processing branch also includes: A mud-stone separator is located below the feeder, and the outlet of the feeder is connected to the inlet of the mud-stone separator; the mud-stone separator has two outlets. The box-type crusher is connected to one of the discharge ports of the mud-stone separator and is used to crush the large particles of waste conveyed by the mud-stone separator into small particles of waste with a preset particle size. The vibrating screen is connected to another discharge port of the mud-stone separator and is used to process the wastewater and small particulate waste conveyed by the mud-stone separator. The feed port of the vibrating screen is also connected to the clarification water tank of the first processing branch.

6. The PC prefabrication plant wastewater and waste residue resource recycling system as described in claim 5, characterized in that, The second processing branch also includes: A conical pool is located on one side of the vibrating screen and is used to hold the wastewater from the vibrating screen. A water pump is also installed in the conical pool to transport the wastewater to the fine sand recovery machine.

7. The PC prefabrication plant wastewater and waste residue resource recycling system as described in claim 5, characterized in that, It also includes a bucket elevator, which is located on one side of the sand and gravel bin and is used to lift the waste material processed by the fine sand recovery machine, vibrating screen and box crusher to the sand and gravel bin.

8. The PC prefabrication plant wastewater and waste residue resource recycling system as described in claim 7, characterized in that, It also includes belt conveyor B; belt conveyor B is installed between the fine sand recovery machine, vibrating screen, box crusher and sand and gravel bin, and is used to integrate the waste materials processed by the fine sand recovery machine, vibrating screen and box crusher.

9. The PC prefabrication plant wastewater and waste residue resource recycling system as described in claim 8, characterized in that, It also includes belt conveyor C, which is located between the vibrating screen and belt conveyor B, and is used to transport the small particle waste material screened by the vibrating screen to belt conveyor C.

10. The PC prefabrication plant wastewater and waste residue resource recycling system as described in claim 8, characterized in that, A belt conveyor is installed between the fine sand recovery machine, the box crusher, and belt conveyor B.

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