A water circulation system for washing light substance of construction waste

Abstract

The utility model discloses a water circulation system for building garbage light substance water washing. The water circulation system includes light substance water washing system, collection pool, oblique net filter, sedimentation tank, sedimentation jar and clean water pool who connects in proper order, and light substance water washing system includes the separator, flushes pool, cylinder screen who connects in proper order, the sewage pipeline of separator, flushes pool and cylinder screen is connected with collection pool respectively, and the clean water pipeline of separator and flushes pool is connected with clean water pool respectively, sedimentation jar is connected with medicine jar and filter press respectively, and filter press is connected with collection pool. The utility model solves the problem of low resource utilization rate to sewage when building garbage water washing, realizes the recycling of sewage, and can prevent the blockage problem of subsequent plate and frame filter press.

Description

Technical Field

[0001] This utility model relates to a water circulation system for washing lightweight materials in construction waste, belonging to the field of wastewater treatment technology. Background Technology

[0002] Construction waste refers to the waste generated by construction units or individuals during the construction, laying, demolition, or repair of various buildings, structures, and pipelines. Construction waste is rich in lightweight materials such as plastics, foam, textiles, PVC, and rubber.

[0003] To recycle and reuse resources, various lightweight materials in construction waste are typically sorted, washed, and packaged for sale. During washing, the clean water is supplied by a water circulation system, while the wastewater is either discharged directly or sent to a filter press to be pressed into cakes for recycling. This method has the following drawbacks:

[0004] Because wastewater contains fibrous impurities such as plastics and fabrics, simply using clean water circulation to directly discharge the wastewater or sending the wastewater to a filter press to be pressed into sludge cakes for recycling will result in low resource utilization.

[0005] In addition, after cleaning the lightweight materials of construction waste, there are many fibrous impurities in the sewage collection tank. These fibrous impurities are light and difficult to physically settle when suspended in the sewage collection tank. However, if these impurities are not removed, they will clog the filter press during subsequent filtration, and cleaning the fibrous impurities in the filter press is very difficult. Utility Model Content

[0006] This utility model aims to provide a water circulation system for washing lightweight materials from construction waste, which solves the problem of low resource utilization of wastewater during the washing of lightweight materials from construction waste, realizes the recycling of wastewater, and at the same time can prevent the back-end plate and frame filter press from clogging and improve work efficiency.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A water circulation system for washing lightweight materials in construction waste is characterized by comprising a lightweight material washing system, a collection tank, an inclined screen filter, a sedimentation tank, a sedimentation vessel, and a clear water tank connected in sequence from end to end.

[0009] The light material washing system includes a separator, a rinsing tank, and a drum screen connected in sequence. The wastewater pipes of the separator, the rinsing tank, and the drum screen are respectively connected to the collection tank, and the clean water pipes of the separator and the rinsing tank are respectively connected to the clean water tank. The sedimentation tank is connected to the chemical tank and the filter press, and the filter press is connected to the collection tank.

[0010] The inclined screen filter is used to filter fibrous impurities in the collection pool;

[0011] The inclined screen filter includes a fixed frame, an overflow trough on the fixed frame, a filter screen inclined on the fixed frame, and a collection tank located directly below the filter screen; the overflow trough is connected to the collection tank, the filter screen is located on one side of the overflow trough, and the collection tank is connected to the sedimentation tank.

[0012] In the washing process of lightweight materials from construction waste, wastewater generated by the separator, rinsing tank, and drum screen in the lightweight material washing system is collected in a collection tank through wastewater pipes. The collected wastewater is then pumped and piped to an inclined screen filter for filtration. During filtration, fibrous impurities such as plastics and fabrics in the wastewater remain on the filter screen and are automatically collected. The remaining wastewater falls off the filter screen and is then pumped and piped to a sedimentation tank for preliminary natural sedimentation and storage. The wastewater after natural sedimentation is then pumped and piped to a sedimentation tank for further sedimentation. Inside the sedimentation tank, chemicals from the chemical tank are simultaneously pumped into the sedimentation tank, allowing the wastewater to undergo further chemical precipitation under the catalysis of the chemicals. After chemical precipitation, clear water overflows from the top of the sedimentation tank and flows into a clear water tank through pipes. From the clear water tank, circulating clear water is supplied to the separator and rinsing tank in the light material washing system via clear water pipes. The sediment at the bottom of the sedimentation tank is pumped and piped to a filter press for filtration. After filtration, a sludge cake is obtained. Meanwhile, the wastewater still containing impurities after filtration is pumped to a collection tank for wastewater recycling. By setting up an inclined screen filter and wastewater circulation, this water circulation system can solve the problem of low resource utilization of wastewater during construction waste washing. Because the inclined screen filter is set before the filter press, fibrous impurities are prevented from clogging the filter press.

[0013] Inclined screen filters automatically collect fibrous impurities from wastewater by utilizing their own weight. The fibrous impurities collected on the inclined screen filter only need to be cleaned periodically (usually every two weeks). Then, the inclined screen filter can be backwashed with a high-pressure water gun to restore it to its original condition.

[0014] Furthermore, the sedimentation tank is provided with a collection box connected to the sedimentation pool and the medicine tank respectively, a sinking channel connected to the collection box and extending to the bottom of the sedimentation tank, and an overflow trough connected to the bottom of the sedimentation tank and the clear water pool respectively.

[0015] Furthermore, the medicine container is equipped with a stirring device, which includes a stirring shaft located inside the medicine container and a stirring motor connected to the stirring shaft.

[0016] Furthermore, the filter press is a programmable diaphragm plate and frame filter press.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] 1. This utility model improves the resource utilization rate of wastewater and avoids fibrous impurities clogging the filter press by setting up an inclined screen filter and wastewater circulation.

[0019] 2. By setting up an inclined screen filter, this utility model can automatically collect fibrous impurities in sewage by its own weight, which improves the ease of operation and efficiency.

[0020] 3. This utility model, by setting up an inclined screen filter, sedimentation tank, sedimentation vessel and chemical tank that cooperate with each other, adopts a combination of physical filtration, natural sedimentation and chemical sedimentation, which enables the circulating clean water supplied to the light material washing system to meet the reuse standards and improve the reuse rate of clean water.

[0021] 4. This utility model achieves complete separation of clean water and wastewater through the structural design of the sedimentation tank, resulting in clearer clean water that better meets reuse standards, thus solving the problem that existing technologies cannot completely separate clean water and wastewater.

[0022] 5. This utility model achieves clean water circulation by setting up components such as a collection tank, inclined screen filter, and clear water tank in conjunction with a light material washing system. The amount of circulating water replenished is ≤10% of the total water consumption, achieving a water saving rate of ≥90%. Attached Figure Description

[0023] Figure 1 This is a process flow diagram of one embodiment of the present invention;

[0024] Figure 2 This is a top view of one embodiment of the present invention.

[0025] Figure 3 This is a partial three-dimensional structural view of one embodiment of the present invention;

[0026] Figure 4 This is a three-dimensional structural diagram of the sedimentation tank described in this utility model.

[0027] In the diagram: 1. Collection tank; 2. Inclined screen filter; 21. Fixed frame; 22. Overflow trough; 23. Water collection tank; 3. Sedimentation tank; 4. Sedimentation vessel; 41. Collection box; 42. Flow channel; 43. Settling channel; 44. Overflow trough; 5. Chemical tank; 51. Agitator; 6. Clear water tank; 7. Filter press; 8. Light material washing system; 81. Separator; 82. Washing tank; 83. Rotary drum screen; 84. Packing machine. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] See Figures 1 to 4 This embodiment provides a water circulation system for washing lightweight materials from construction waste, comprising a collection tank 1 connected to a sewage pipe of a lightweight material washing system 8, an inclined screen filter 2 connected to the collection tank 1, a sedimentation tank 3 connected to the inclined screen filter 2, a sedimentation tank 4 connected to the sedimentation tank 3, a chemical tank 5 connected to the sedimentation tank 4, a clear water pool 6 connected to both the clear water pipe of the lightweight material washing system 8 and the sedimentation tank 4, and a filter press 7 connected to both the collection tank 1 and the sedimentation tank 4. The lightweight material washing system 8 includes a separator 81 for separating impurities from the construction waste, a rinsing tank 82 connected to the separator 81, and a drum screen 83 connected to the rinsing tank 82. The separator 81, rinsing tank 82, and drum screen 83 are connected to the collection tank 1 via sewage pipes, the separator 81 and rinsing tank 82 are connected to the clear water pool 6 via clear water pipes, and the drum screen 83 is connected to a baling machine 84. The water circulation system is based on "physical filtration + natural sedimentation + chemical sedimentation + sludge depressurization". It realizes closed-loop circulation and resource utilization of the wastewater generated by the light material washing system 8, which meets the requirements of environmental protection and cost reduction.

[0030] See Figure 2 and Figure 3 The inclined screen filter 2 includes a fixed frame 21 fixed to the ground, an overflow trough 22 mounted on the fixed frame 21 and connected to the collection tank 1, a filter screen (not shown in the figure) inclined on the fixed frame 21 and located on one side of the overflow trough 22, and a collection tank 23 located directly below the filter screen and connected to the sedimentation tank 3. Wastewater collected in the collection tank 1 is pumped upwards into the overflow trough 22 via pumps and pipelines. After overflowing from the overflow trough 22, the wastewater flows downwards along the filter screen. During this flow, the wastewater falls through the filter screen by its own weight and is collected in the collection tank 23, leaving fibrous impurities such as plastic and fabric on the surface of the filter screen. Thus, this water circulation system can both coarsely filter wastewater and automatically collect fibrous impurities from the wastewater by its own weight, improving operational convenience and efficiency, and preventing clogging of subsequent equipment.

[0031] See Figure 2 and Figure 4The sedimentation tank 4 is equipped with a collection box 41 connected to the sedimentation tank 3 and the medicine tank 5, a sinking channel 43 connected to the collection box 41 via a flow channel 42 and extending to the bottom of the sedimentation tank 4, and an overflow channel 44 connected to the bottom of the sedimentation tank 4 and the clear water tank 6. The sedimentation tank 3 is located below the sedimentation tank 4, or below ground level. Wastewater in the sedimentation tank 3 and medicine in the medicine tank 5 are pumped together into the collection box 41, then flow through the flow channel 42 to the sinking channel 43, and then converge to the bottom of the sedimentation tank 4 through the sinking channel 43 to mix for chemical sedimentation. After sedimentation, the clear water overflows from the top of the overflow channel 44, while the wastewater remains at the bottom of the sedimentation tank 4.

[0032] See Figure 2 The medicine tank 5 is equipped with a stirring device 51. This stirring device 51 includes a stirring shaft located inside the medicine tank 5 and a stirring motor connected to the stirring shaft and mounted on the medicine tank 5. The stirring device 51 is used to uniformly stir the medicine within the medicine tank 5, facilitating subsequent mixing of the medicine with wastewater and improving the removal rate of suspended solids in the wastewater. See also... Figure 2 The filter press 7 is a commercially available programmable diaphragm plate and frame filter press, model XMGZ250 / 1250-U. The programmable diaphragm plate and frame filter press is used to press the sediment at the bottom of the sedimentation tank 4 into a sludge cake. The programmable diaphragm plate and frame filter press has a good sludge cake pressing effect and can significantly reduce the moisture content of the sludge cake.

[0033] See Figure 1 The process flow of the water circulation system for washing lightweight materials from construction waste in this embodiment is as follows:

[0034] S1. Wastewater generated by the light material washing system 8 (i.e., wastewater generated by the separator 81, the rinsing tank 82, and the drum screen 83) enters the collection tank 1 through the wastewater pipe for collection.

[0035] S2. The collected wastewater is pumped and piped to the inclined screen filter 2 for filtration. During filtration, fibrous impurities such as plastics and fabrics in the wastewater are automatically collected on the filter screen of the inclined screen filter 2. The remaining wastewater falls from the filter screen into the collection tank 23 and is then pumped and piped to the sedimentation tank 3 for preliminary natural sedimentation and storage. Fibrous impurities such as plastics and fabrics are generally cleaned about every two weeks, and the inclined screen filter 2 is backwashed with a high-pressure water gun.

[0036] S3. Wastewater in sedimentation tank 3 is pumped to sedimentation tank 4 through pumps and pipelines. At the same time, the reagent in reagent tank 5, after being stirred by stirring device 51, is also pumped to sedimentation tank 4, so that the wastewater undergoes chemical precipitation in sedimentation tank 4 under the catalysis of the reagent.

[0037] S4. After chemical precipitation, the clear water overflows from the top of the sedimentation tank 4 and enters the clear water pool 6 through the pipeline. The clear water pool 6 supplies circulating clear water to the light material washing system 8 through the clear water pipeline (i.e., supplies clear water to the separator 81 and the rinsing pool 82). At the same time, the sediment (such as sludge) deposited at the bottom of the sedimentation tank 4 is pumped to the filter press 7 for filter pressing treatment through the pump and pipeline.

[0038] S5. After the mud cake is pressed by the filter press 7, it is sold as stone powder. The wastewater that still contains impurities after pressing is pumped to the collection tank 1 for wastewater recycling treatment.

[0039] The embodiments of the present invention have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention is not limited to the specific embodiments described above; these embodiments are merely illustrative and not limiting. Those skilled in the art, under the guidance of the present invention, can make many modifications without departing from the spirit and scope of the claims, and all such modifications fall within the protection scope of the present invention.

Claims

1. A water circulation system for washing lightweight materials from construction waste, characterized in that, It includes a light material washing system (8), a collection tank (1), an inclined screen filter (2), a sedimentation tank (3), a sedimentation tank (4), and a clear water tank (6) connected end to end. The light material washing system (8) includes a separator (81), a rinsing tank (82), and a drum screen (83) connected in sequence. The sewage pipes of the separator (81), the rinsing tank (82), and the drum screen (83) are respectively connected to the collection tank (1). The clean water pipes of the separator (81) and the rinsing tank (82) are respectively connected to the clean water tank (6). The sedimentation tank (4) is respectively connected to the medicine tank (5) and the filter press (7). The filter press (7) is connected to the collection tank (1). The inclined screen filter (2) is used to filter fibrous impurities in the collection tank (1); The inclined screen filter (2) includes a fixed frame (21), an overflow trough (22) on the fixed frame (21), a filter screen inclined on the fixed frame (21), and a water collection tank (23) located directly below the filter screen; the overflow trough (22) is connected to the collection tank (1), the filter screen is located on one side of the overflow trough (22), and the water collection tank (23) is connected to the sedimentation tank (3).

2. The water circulation system for washing lightweight materials from construction waste according to claim 1, characterized in that, The sedimentation tank (4) is provided with a collection box (41) connected to the sedimentation pool (3) and the medicine tank (5) respectively, a sinking channel (43) connected to the collection box (41) and extending to the bottom of the sedimentation tank (4), and an overflow trough (44) connected to the bottom of the sedimentation tank (4) and the clear water pool (6) respectively.

3. The water circulation system for washing lightweight materials from construction waste according to claim 1, characterized in that, The medicine container (5) is equipped with a stirring device (51), which includes a stirring shaft located inside the medicine container (5) and a stirring motor connected to the stirring shaft.

4. The water circulation system for washing lightweight materials from construction waste according to claim 1, characterized in that, The filter press (7) is a programmable diaphragm plate and frame filter press.

Images