Collection equipment

Abstract

To provide a recovery facility capable of increasing a recovery rate of valuable substances.SOLUTION: A recovery facility includes a first treatment system, a second treatment system, and a recovery system, the first treatment system including: a first treatment device that performs a predetermined treatment to a valuable substance contained in a liquid to be treated to form a first treated substance; a first supply path that supplies the first treated substance to the second treatment system; and a first discharge path for discharging a first waste water containing the first treated substance, the second treatment system including: a second treatment device that performs a predetermined treatment to the first treated substance to obtain a second treated substance; a second supply path that supplies the second treated substance to outside of the second treatment system; and a second discharge path for discharging a second waste water containing the second treated substance, in which the recovery system performs at least one of: a treatment of recovering the first treated substance from the first waste water; and a treatment of recovering the second treated substance from the second waste water, and the recovered substance to be treated is supplied to at least one of the first treatment system and the second treatment system.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a recovery facility.

Background Art

[0002] For example, in various recycling facilities (hereinafter also referred to as recovery facilities) such as paper diapers, valuable materials such as pulp, superabsorbent polymer (SAP), and plastic (hereinafter also referred to as recycling targets) are recycled (see Patent Documents 1 to 3).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-mentioned recovery facility, it is desirable to increase the recovery rate of valuable materials.

Means for Solving the Problems

[0005] In order to increase the recovery rate of the valuable materials described above, the recovery equipment for materials to be recycled according to the present invention comprises a first processing system, a second processing system, and a recovery system. The first processing system comprises a first processing device that performs a predetermined treatment on the valuable materials contained in the liquid to be processed to produce a first processed material, a first supply channel that supplies the first processed material to the second processing system, and a first discharge channel that discharges first wastewater containing the first processed material. The second processing system comprises a second processing device that performs the predetermined treatment on the first processed material to produce a second processed material, a second supply channel that supplies the second processed material to the outside of the second processing system, and a second discharge channel that discharges second wastewater containing the second processed material. The recovery system performs at least one of the following processes: a process to recover the first processed material from the first wastewater and a process to recover the second processed material from the second wastewater, and supplies the recovered processed material to at least one of the first processing system and the second processing system. [Effects of the Invention]

[0006] The recycling equipment for materials according to the present invention makes it possible to increase the recovery rate of valuable materials. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is a diagram showing the configuration of the recovery equipment 100. [Figure 2] Figure 2 is a diagram showing the configuration of the recovery equipment 200. [Figure 3] Figure 3 is a diagram showing the configuration of the recovery equipment 300. [Figure 4] Figure 4 is a diagram showing the configuration of the recovery equipment 400. [Figure 5] Figure 5 is a diagram showing the configuration of the recovery equipment 500. [Figure 6] Figure 6 is a diagram showing the configuration of the recovery equipment 600. [Figure 7] Figure 7 is a table illustrating specific examples of the recovery rate and wastewater volume of valuable material 1. [Modes for carrying out the invention]

[0008] Before describing embodiments of the present invention, let us describe the recovery equipment to which the present invention is applied. Such recovery equipment includes, for example, pulp recovery equipment in the recycling process of disposable diapers, and wood powder This is a wood chip recovery facility with attached materials. Specifically, the pulp recovery facility is a recovery facility that recovers pulp as a valuable material, for example. Similarly, the wood chip recovery facility is a recovery facility that recovers wood chips as a valuable material, for example. The valuable materials recovered in each recovery facility are, for example, solid materials.

[0009] In the aforementioned recovery facilities, the recovery rate of valuable materials significantly impacts the profits from selling those materials and the costs of purchasing raw materials. Therefore, each recovery facility is required to improve its recovery rate of valuable materials.

[0010] In this regard, recovery facilities perform solid-liquid separation to recover valuable materials. However, the liquid remaining after solid-liquid separation contains some of the valuable materials. Therefore, in each recovery facility, some of the valuable materials may be discharged as wastewater along with the liquid remaining after solid-liquid separation.

[0011] In response to this, one possible method is to recover 100% of the valuable material by evaporating the liquid. However, evaporating the liquid by natural drying requires a considerable amount of time and space, and evaporating the liquid by reduced pressure or heating incurs enormous costs. Therefore, the method of recovering valuable material by evaporating the liquid is difficult to implement.

[0012] In other words, achieving a 100% recovery rate of valuable materials is difficult, and with conventional methods, for example, 5% to 30% of the valuable materials are discharged as wastewater along with the liquid.

[0013] Furthermore, in each of the above-described recovery facilities, it may be difficult to perform continuous operation while maintaining the recovery rate due to fluctuations in the properties and amounts of valuable materials, etc., and there are limitations to improving the recovery rate by using only devices that perform solid-liquid separation, such as screens and dehydrators (hereinafter also referred to as solid-liquid separation devices).

[0014] Therefore, in order to improve the recovery rate of valuable materials, for example, it is necessary to construct a facility consisting of a plurality of devices including a solid-liquid separation device. Note that as the above-described solid-liquid separation device, for example, devices such as screens and dehydrators are used.

[0015] Hereinafter, embodiments of the present invention that enable an increase in the recovery rate of valuable materials will be described with reference to the drawings. However, such example embodiments do not limit the technical scope of the present invention.

[0016] The recovery facility in one embodiment of the present invention includes a first processing system, a second processing system, and a recovery system. The first processing system includes a first processing device that performs a predetermined process on valuable materials contained in the liquid to be processed to obtain a first processed product, a first supply path that supplies the first processed product to the second processing system, and a first discharge path that discharges first drainage containing the first processed product. The second processing system includes a second processing device that performs a predetermined process on the first processed product to obtain a second processed product, a second supply path that supplies the second processed product outside the second processing system, and a second discharge path that discharges second drainage containing the second processed product. The recovery system executes at least one of the processes of recovering the first processed product from the first drainage and the process of recovering the second processed product from the second drainage, and supplies the recovered processed product to at least one of the first processing system and the second processing system.

[0017] Hereinafter, the recovery facility in one embodiment of the present invention will be described while exemplifying the first to sixth embodiments.

[0018] [Recovery Facility 100 in the First Embodiment] First, the recovery facility 100 for the object to be recycled in the first embodiment will be described. Hereinafter, the recovery facility for the object to be recycled will be abbreviated as the recovery facility. FIG. 1 is a configuration diagram of the recovery facility 100 in the first embodiment.

[0019] As shown in FIG. 1, the recovery facility 100 includes, for example, a first treatment system 10 including a first treatment device 11 that cleans the liquid to be treated containing the valuable material 1, and a second treatment system 20 including a second treatment device 21 that further cleans the liquid to be treated containing the valuable material 1 after the first treatment system 10 has cleaned it. Also, the recovery facility 100 has a first recovery system 30 that recovers the valuable material 1 from the drainage water supplied from the first treatment system 10 (hereinafter also referred to as the first drainage water), and a second recovery system 40 that recovers the valuable material 1 from the drainage water supplied from the second treatment system 20 (hereinafter also referred to as the second drainage water).

[0020] The first treatment system 10 (first treatment device 11) performs a cleaning process, for example, in which the liquid to be treated containing the valuable material 1 supplied from the previous process via line L1 and the liquid to be treated containing the valuable material 1 supplied from the first recovery system 30 via line L11 are cleaned with solution 2. Then, the first treatment system 10 (first treatment device 11) performs a dehydration process, for example, in which the liquid to be treated containing the valuable material 1 after the cleaning is dehydrated. Hereinafter, the process including the cleaning process and the dehydration process will also be referred to as a predetermined process. Further, the first treatment system 10 (first treatment device 11) injects solution 2 into the liquid to be treated containing the valuable material 1 after dehydration via line L2 so that the concentration of the valuable material 1 becomes a predetermined concentration (for example, 15 (%)) determined in advance. The predetermined concentration here is determined, for example, according to the concentration required to appropriately perform the subsequent process in the first treatment system 10. Also, the subsequent process here is, for example, an ozone treatment that decomposes the organic matter in the liquid to be treated containing the valuable material 1.

[0021] Subsequently, the first processing system 10 (first processing device 11) separates a portion of the liquid to be processed, including the valuable material 1, after each processing in the first processing system 10 by concentrating the liquid. The separated liquid is supplied as wastewater (first wastewater) from line L3 (hereinafter also referred to as the first discharge channel L3) to the first recovery system 30, and the concentrated liquid to be processed, including the valuable material 1 (hereinafter also referred to as the first processed material), is supplied from line L4 (hereinafter also referred to as the first supply channel L4) to the second processing system 20. In this case, the wastewater supplied from the first processing system 10 to the first recovery system 30 contains some of the valuable material 1 that was not recovered in the first processing system 10.

[0022] The second processing system 20 (second processing device 21) performs a washing process in which it washes the liquid to be processed containing the valuable substance 1 supplied from the first processing system 10 via line L4, as well as the liquid to be processed containing the valuable substance 1 supplied from the second recovery system 40 via line L12, with solution 2. Then, the second processing system 20 (second processing device 21) performs a dewatering process in which it dewaters the liquid to be processed containing the valuable substance 1 after washing. Furthermore, the second processing system 20 (second processing device 21) injects solution 2 into the liquid to be processed containing the valuable substance 1 after dewatering so that the concentration of the valuable substance 1 becomes a predetermined concentration (for example, 15%).

[0023] Subsequently, the second processing system 20 (second processing device 21) separates a portion of the liquid to be processed by concentrating the liquid containing the valuable material 1 after each processing in the second processing system 20, and supplies the separated liquid to the second recovery system 40 as wastewater (second wastewater) via line L5 (hereinafter also referred to as the second discharge channel L5), and supplies the liquid to be processed containing the concentrated valuable material 1 (hereinafter also referred to as the second processed material) to the outside (for example, a system that performs the next process) via line L6 (hereinafter also referred to as the second supply channel L6). In this case, the wastewater supplied from the second processing system 20 to the second recovery system 40 includes: This includes some of the valuable materials 1 that were not recovered in the second processing system 20.

[0024] For example, when the first recovery system 30 receives a liquid to be treated (wastewater) containing valuable material 1 from the first processing system 10 via line L3, it concentrates the liquid to be treated containing valuable material 1 supplied from the first processing system 10 to separate a portion of the liquid to be treated, discharges the separated liquid to the outside as wastewater, and supplies the concentrated liquid to be treated containing valuable material 1 to the first processing system 10 via line L11.

[0025] For example, when the second recovery system 40 receives a liquid to be treated (wastewater) containing valuable material 1 from the second treatment system 20 via line L5, it concentrates the liquid to be treated containing valuable material 1 supplied from the second treatment system 20 to separate a portion of the liquid to be treated, discharges the separated liquid to the outside as wastewater, and supplies the concentrated liquid to be treated containing valuable material 1 to the second treatment system 20 via line L12.

[0026] In other words, the first recovery system 30 and the second recovery system 40 recover the valuable materials 1 contained in the wastewater discharged by the first treatment system 10 and the second treatment system 20 and supply them to the first recovery system 30 and the second recovery system 40. The first treatment system 10 and the second treatment system 20 also recover the valuable materials 1 supplied from the first recovery system 30 and the second recovery system 40.

[0027] The following describes other examples of processing in the processing system and recovery in the recovery system, but these other examples can be applied to the recycling equipment of the second to sixth embodiments in addition to the first embodiment. Here, valuable material 1 is, for example, pulp. In addition to valuable material 1, the liquid to be processed supplied to the first processing device 11 includes, for example, SAP and plastics.

[0028] The first processing apparatus 11 includes, for example, a coarse screen, a first drum screen, a fine screen, and a first dewatering machine. Note that solution 2 does not necessarily have to be supplied to the first processing apparatus 11. The coarse screen separates plastic from the liquid to be processed, which contains pulp, SAP, and plastic. The liquid to be processed after plastic separation, which contains SAP and pulp, is supplied to the first drum screen.

[0029] The first drum screen separates SAP and pulp from the liquid being treated after plastic separation. Hereafter, the separated SAP and pulp will be referred to as the first drum screen processed material. Even if SAP and pulp are separated using a drum screen, it is not possible to separate all SAP and pulp from the treated liquid after plastic separation, so the filtrate (treated liquid) contains SAP and pulp.

[0030] The first dewatering machine dewaters the first drum screen processed material and supplies the dewatered SAP and pulp to the second processing device 21 via the first supply path L4. The dewatered SAP and pulp are the so-called first processed material. The dewatered liquid (liquid to be processed) from the first dewatering machine contains SAP and pulp. It can be done.

[0031] The first fine screen separates SAP from the mixed liquid of the liquid to be treated from the first drum screen and the liquid to be treated from the first dewatering machine. The liquid to be treated after SAP separation is supplied as wastewater from the first discharge channel L3 to the first recovery system 30. This wastewater is the so-called first wastewater.

[0032] The first recovery system 30, for example, has a flotation concentrator and concentrates the liquid to be treated supplied from the first discharge channel L3 to recover pulp. The first recovery system 30 adds water to the recovered pulp and supplies it to the first treatment device 11 from line L11. This process increases the pulp recovery rate. To improve.

[0033] The second processing apparatus 21 includes an ozone processing apparatus for ozone treatment of pulp, a second drum screen, and a second dewatering machine.

[0034] The second processing unit 21 dilutes the dewatered SAP and pulp supplied from the first processing unit 11 by adding water. In the dilution process, solution 2 is water, and the second processing unit 21 supplies solution 2 to the dewatered SAP and pulp. The ozone processing unit supplies ozone to the diluted solution. Hereinafter, the solution after ozone supply will be referred to as the ozone-treated liquid. The ozone-treated liquid contains bleached pulp.

[0035] The second drum screen separates pulp from the ozone-treated liquid. Hereafter, the separated pulp will be referred to as the second drum screen processed material. Even after separating the pulp with the second drum screen, not all of the pulp can be separated from the ozone-treated liquid, so the filtrate (treated liquid) will still contain pulp.

[0036] The second dewatering machine dewaters the material processed by the second drum screen and supplies the dewatered pulp from the second supply passage L6 to the next processing device (not shown). The dewatered liquid (liquid to be processed) from the second dewatering machine contains pulp.

[0037] The liquid to be processed from the second drum screen and the liquid to be processed from the second dewatering machine are supplied as wastewater to the second recovery system 40 via the second discharge channel L5. This wastewater is what is known as the second wastewater.

[0038] The second recovery system 40 includes, for example, a flotation concentrator, which concentrates the liquid to be treated supplied from the second discharge channel L5 to recover pulp. The second recovery system 40 adds water to the recovered pulp and supplies it to the second treatment device 21 from line L12. In the embodiment of the present invention, the recovery equipment is not limited to the above-described treatment, and various treatments can be performed depending on the recycled material to be recovered.

[0039] As a result, in the recovery equipment 100 of the first embodiment, it is possible to reduce the amount of valuable material 1 discharged to the outside along with the wastewater, and to improve the recovery rate of valuable material 1 in the first treatment system 10 and the second treatment system 20.

[0040] Furthermore, in the recovery equipment 100 of the first embodiment, the amount of valuable material 1 supplied from the first processing system 10 to the second processing system 20 increases by supplying the valuable material 1 recovered in the first recovery system 30 to the first processing system 10. Therefore, in the recovery equipment 100 of the first embodiment, it becomes possible to increase the amount of solution 2 supplied to the valuable material 1 in the second processing system 20, thereby improving the cleaning effect of the valuable material 1 in the second processing system 20.

[0041] Furthermore, in the recovery equipment 100 of the first embodiment, the valuable material 1 recovered in the first recovery system 30 is supplied to the first processing system 10, and the valuable material 1 recovered in the second recovery system 40 is supplied to the second processing system 20, making it possible to make the amount of wastewater discharged from the first recovery system 30 and the second recovery system 40 approximately the same. Therefore, in the recovery equipment 100 of the first embodiment, for example, it becomes possible to use the same wastewater equipment in the first recovery system 30 and the second recovery system 40, and wastewater equipment can be reused between the first recovery system 30 and the second recovery system 40.

[0042] [Recovery equipment 200 in the second implementation] Next, we will describe the recovery equipment 200 in the second embodiment. Figure 2 is a diagram of the configuration of the recovery equipment 200 in the second embodiment. The differences from the recovery equipment 100 will be explained below.

[0043] In the recovery equipment 200 of the second embodiment, as shown in Figure 2, the liquid to be treated (wastewater) supplied from the first treatment system 10 is supplied to the first treatment system 10 by the first recovery system 30, which contains the valuable material 1 separated from the liquid to be treated (wastewater) supplied from the second treatment system 20, and the liquid to be treated (wastewater) supplied from the second recovery system 40 is supplied to the first treatment system 10, which contains the valuable material 1 separated from the liquid to be treated (wastewater).

[0044] The first processing system 10 (first processing device 11) washes, for example, the liquid to be processed containing valuable material 1 supplied from the previous process via line L1, the liquid to be processed containing valuable material 1 supplied from the first recovery system 30 via line L21, and the liquid to be processed containing valuable material 1 supplied from the second recovery system 40 via line L22 with solution 2. The second processing system 20 (second processing device 21) washes, for example, the liquid to be processed containing valuable material 1 supplied from the first processing system 10 via line L4 with solution 2.

[0045] As a result, in the recovery equipment 200 of the second embodiment, it is possible to reduce the amount of valuable material 1 discharged to the outside along with the wastewater, and to improve the recovery rate of valuable material 1 in the first treatment system 10 and the second treatment system 20.

[0046] Furthermore, in the recovery equipment 200 of the second embodiment, the amount of valuable material 1 supplied from the first processing system 10 to the second processing system 20 is increased by supplying the valuable material 1 recovered in the first recovery system 30 and the valuable material 1 recovered in the second recovery system 40 to the first processing system 10. As a result, in the recovery equipment 200 of the second embodiment, it becomes possible to further increase the amount of solution 2 supplied to the valuable material 1 in the second processing system 20, thereby further improving the cleaning effect of the valuable material 1 in the second processing system 20.

[0047] [Recovery equipment 300 in the third implementation] Next, we will describe the recovery equipment 300 in the third embodiment. Figure 3 is a diagram of the configuration of the recovery equipment 300 in the third embodiment. The differences from the recovery equipment 100 will be explained below.

[0048] In the third embodiment, as shown in Figure 3, the recovery equipment 300 supplies the liquid to be treated (wastewater) supplied from the first treatment system 10, which contains the valuable material 1 separated by the first recovery system 30, to the second treatment system 20, and supplies the liquid to be treated (wastewater) supplied from the second treatment system 20, which contains the valuable material 1 separated by the second recovery system 40, to the first treatment system 10.

[0049] The first processing system 10 (first processing device 11) washes the liquid to be processed containing valuable material 1 supplied from the previous process via line L1, as well as the liquid to be processed containing valuable material 1 supplied from the second recovery system 40 via line L32, with solution 2. The second processing system 20 (second processing device 21) washes the liquid to be processed containing valuable material 1 supplied from the first processing system 10 via line L4, as well as the liquid to be processed containing valuable material 1 supplied from the first recovery system 30 via line L31, with solution 2.

[0050] As a result, in the third embodiment, the recovery equipment 300 discharges the wastewater to the outside. This makes it possible to reduce the amount of valuable material 1 that is processed, and to improve the recovery rate of valuable material 1 in the first processing system 10 and the second processing system 20.

[0051] Furthermore, in the recovery equipment 300 of the third embodiment, the amount of valuable material 1 supplied from the first processing system 10 to the second processing system 20 is increased by supplying the valuable material 1 recovered in the second recovery system 40 to the first processing system 10. Therefore, in the recovery equipment 300 of the third embodiment, it becomes possible to increase the amount of solution 2 supplied to the valuable material 1 in the second processing system 20, thereby improving the cleaning effect of the valuable material 1 in the second processing system 20.

[0052] Furthermore, in the recovery equipment 300 of the third embodiment, the valuable material 1 recovered in the second recovery system 40 is supplied to the first processing system 10, and the valuable material 1 recovered in the first recovery system 30 is supplied to the second processing system 20, making it possible to make the amount of wastewater discharged from the first recovery system 30 and the second recovery system 40 approximately the same. Therefore, in the recovery equipment 300 of the third embodiment, for example, it becomes possible to use the same wastewater equipment in the first recovery system 30 and the second recovery system 40, and wastewater equipment can be reused between the first recovery system 30 and the second recovery system 40.

[0053] [Recovery equipment 400 in the fourth implementation] Next, we will describe the recovery equipment 400 in the fourth embodiment. Figure 4 is a diagram of the configuration of the recovery equipment 400 in the fourth embodiment. The differences from the recovery equipment 100 will be explained below.

[0054] In the recovery equipment 400 of the fourth embodiment, as shown in Figure 4, the liquid to be treated (wastewater) supplied from the first treatment system 10 is supplied to the second treatment system 20 by the first recovery system 30, which contains the valuable material 1 separated from the liquid to be treated (wastewater) supplied from the second treatment system 20, and the liquid to be treated (wastewater) supplied from the second treatment system 20 is supplied to the second treatment system 20 by the second recovery system 40, which contains the valuable material 1 separated from the liquid to be treated (wastewater).

[0055] The first processing system 10 (first processing device 11) washes the liquid to be processed, which contains valuable material 1 supplied from the previous process via line L1, with solution 2. The second processing system 20 (second processing device 21) washes the liquid to be processed, which contains valuable material 1 supplied from the first processing system 10 via line L4, as well as the liquid to be processed, which contains valuable material 1 supplied from the first recovery system 30 via line L41, and the liquid to be processed, which contains valuable material 1 supplied from the second recovery system 40 via line L42, with solution 2.

[0056] As a result, in the recovery equipment 400 of the fourth embodiment, it is possible to reduce the amount of valuable material 1 discharged to the outside along with the wastewater, and to improve the recovery rate of valuable material 1 in the first treatment system 10 and the second treatment system 20.

[0057] Furthermore, in the recovery equipment 400 of the fourth embodiment, if the amount of liquid to be treated containing the valuable material 1 supplied from the first recovery system 30 to the second treatment system 20 is large, that is, if the amount of wastewater separated from the valuable material 1 in the first recovery system 30 is small, the amount of solution 2 that can be injected into the second treatment system 20 will be small. Moreover, in the recovery equipment 400 of the fourth embodiment, if the amount of liquid to be treated containing the valuable material 1 supplied from the second recovery system 40 to the second treatment system 20 is large, that is, if the amount of wastewater separated from the valuable material 1 in the second recovery system 40 is small, the amount of solution 2 that can be injected into the second treatment system 20 will be even smaller. Therefore, the recovery equipment 400 of the fourth embodiment makes it possible to reduce the wastewater discharge capacity of the wastewater treatment equipment, for example.

[0058] [Recovery equipment 500 in the fifth implementation] Next, we will describe the recovery equipment 500 in the fifth embodiment. Figure 5 is a diagram of the configuration of the recovery equipment 500 in the fifth embodiment. The differences from the recovery equipment 100 will be explained below.

[0059] As shown in Figure 5, the recovery equipment 500 in the fifth embodiment has a single recovery system, the recovery system 50, instead of the first recovery system 30 and the second recovery system 40 in the recovery equipment 100 of the first embodiment. The recovery system 50 performs at least one of the following processes: a process to recover a first treated material from the first wastewater discharged from the first treatment system 10 and a process to recover a second treated material from the second wastewater discharged from the second treatment system 20, and supplies the recovered treated material to the first treatment system 10 via line L51. In other words, the recovery system 50 supplies the liquid to be treated, which contains the valuable material 1 separated from the liquid to be treated (wastewater) supplied from at least one of the first treatment system 10 and the second treatment system 20, to the first treatment system 10. To improve the recovery rate of the valuable material 1, it is preferable that the recovery system 50 supplies the liquid to be treated, which contains the valuable material 1 separated from the liquid to be treated supplied from the first treatment system 10 and the second treatment system 20, to the first treatment system 10.

[0060] The first processing system 10 (first processing device 11) washes the liquid to be processed containing the valuable substance 1 supplied from the previous process via line L1, as well as the liquid to be processed containing the valuable substance 1 supplied from the recovery system 50 via line L51, with solution 2. The second processing system 20 (second processing device 21) washes the liquid to be processed containing the valuable substance 1 supplied from the first processing system 10 via line L4, as well as solution 2.

[0061] As a result, in the fifth embodiment, the recovery equipment 500 makes it possible to reduce the amount of valuable material 1 discharged to the outside along with the wastewater, and improves the recovery rate of valuable material 1 in the first treatment system 10 and the second treatment system 20.

[0062] Furthermore, in the recovery equipment 500 of the fifth embodiment, the amount of valuable material 1 supplied from the first processing system 10 to the second processing system 20 is increased by supplying the valuable material 1 recovered in the recovery system 50 to the first processing system 10. As a result, in the recovery equipment 500 of the fifth embodiment, it becomes possible to further increase the amount of solution 2 supplied to the valuable material 1 in the second processing system 20, thereby further improving the cleaning effect of the valuable material 1 in the second processing system 20.

[0063] [Recovery equipment 600 in the sixth implementation] Next, we will describe the recovery equipment 600 in the sixth embodiment. Figure 6 is a diagram of the configuration of the recovery equipment 600 in the sixth embodiment. The differences from the recovery equipment 100 will be explained below.

[0064] As shown in Figure 6, the recovery equipment 600 in the sixth embodiment has a single recovery system, the recovery system 50, instead of the first recovery system 30 and the second recovery system 40 in the recovery equipment 100 of the first embodiment. The recovery system 50 performs at least one of the following processes: recovering a first treated material from the first wastewater discharged from the first treatment system 10 and recovering a second treated material from the second wastewater discharged from the second treatment system 20, and supplies the recovered treated material to the second treatment system 20 via line L61. In other words, the recovery system 50 supplies the liquid to be treated, which contains the valuable material 1 separated from the liquid to be treated (wastewater) supplied from at least one of the first treatment system 10 and the second treatment system 20, to the second treatment system 20. In order to improve the recovery rate of the valuable material 1, the recovery system It is preferable that the Tem 50 supplies the liquid to be processed, which contains the valuable substance 1 separated from the liquid to be processed supplied from the first processing system 10 and the second processing system 20, to the second processing system 20.

[0065] The first processing system 10 (first processing device 11) washes the liquid to be processed, which contains the valuable substance 1 supplied from the previous process via line L1, with solution 2. The second processing system 20 (second processing device 21) washes the liquid to be processed, which contains the valuable substance 1 supplied from the first processing system 10 via line L4, with solution 2, as well as the liquid to be processed, which contains the valuable substance 1 supplied from the recovery system 50 via line L61.

[0066] As a result, in the recovery equipment 600 of the sixth embodiment, it is possible to reduce the amount of valuable material 1 discharged to the outside along with the wastewater, and to improve the recovery rate of valuable material 1 in the first treatment system 10 and the second treatment system 20.

[0067] Furthermore, in the recovery equipment 600 of the sixth embodiment, if the amount of liquid to be treated containing the valuable material 1 supplied from the recovery system 50 to the second treatment system 20 is large, that is, if the amount of wastewater separated from the valuable material 1 in the recovery system 50 is small, the amount of solution 2 that can be injected into the second treatment system 20 will be small. Therefore, the recovery equipment 600 of the sixth embodiment makes it possible to reduce the wastewater discharge capacity of the wastewater equipment used in the recovery system 50, for example.

[0068] [Specific examples of recovery rate and wastewater volume of valuable material 1] Next, specific examples of the recovery rate of valuable material 1 and the amount of wastewater discharged in the first to sixth embodiments will be described. Figure 7 is a table illustrating specific examples of the recovery rate of valuable material 1 and the amount of wastewater discharged.

[0069] The table in Figure 7 shows the "recovery rate," which is the percentage of valuable material 1 contained in the liquid to be treated supplied from the previous process to the first processing system 10 via line L1 that was recovered in the second processing system 20. The table in Figure 7 also shows the "wastewater volume (1)," which is the amount of wastewater discharged from the first processing system 10 and the first recovery system 30, and the "wastewater volume (2)," which is the amount of wastewater discharged from the second processing system 20 and the second recovery system 40. Furthermore, the table in Figure 7 shows the amount of wastewater discharged from the recovery system 50, or the "total wastewater volume," which is the sum of the wastewater volume listed in "wastewater volume (1)" and the wastewater volume listed in "wastewater volume (2)."

[0070] Note that the comparative example in the example shown in Figure 7 represents a facility that has only the first processing system 10 and the second processing system 20 (a recovery system that does not have any of the first recovery system 30, the second recovery system 40, or the recovery system 50). Also, in the example shown in Figure 7, the wastewater amounts listed as "Wastewater Amount (1)", "Wastewater Amount (2)", and "Wastewater Amount (Total)" are amounts where the amount of liquid to be treated, containing valuable material 1, supplied from the previous process to the first processing system 10 via line L1 is set to "100".

[0071] Specifically, in the table shown in Figure 7, the "recovery rates" corresponding to "Comparative Example," "First Embodiment," "Second Embodiment," "Third Embodiment," "Fourth Embodiment," "Fifth Embodiment," and "Sixth Embodiment" are listed as "65.6(%)," "95.5(%)," "95.0(%)," "95.5(%)," "95.9(%)," "95.0(%)," and "95.9(%)."

[0072] In other words, the examples shown in Figure 7 are, for example, the cases of the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, and the sixth embodiment. This shows that the recovery rate of valuable material 1 in this case is approximately 30% higher than the recovery rate of valuable material 1 in the comparative example.

[0073] Furthermore, in the table shown in Figure 7, the "discharge volume (1)" and "discharge volume (2)" corresponding to the "comparative example" are "116.2" and "94.2", respectively, while the "discharge volume (1)" and "discharge volume (2)" corresponding to the "first embodiment" are "104.3" and "102.0". Therefore, the example shown in Figure 7 demonstrates, for example, that the "discharge volume (1)" and "discharge volume (2)" in the first embodiment are approximately the same, and that the wastewater treatment equipment can be reused between the first recovery system 30 and the second recovery system 40.

[0074] Furthermore, in the table shown in Figure 7, the "discharge volume (1)" and "discharge volume (2)" corresponding to the "comparative example" are "116.2" and "94.2", respectively, while the "discharge volume (1)" and "discharge volume (2)" corresponding to the "third embodiment" are "103.8" and "101.9". Therefore, the example shown in Figure 7 demonstrates, for example, that the "discharge volume (1)" and "discharge volume (2)" in the third embodiment are approximately the same, and that the wastewater treatment equipment can be reused between the first recovery system 30 and the second recovery system 40.

[0075] Furthermore, in the table shown in Figure 7, the "total wastewater volume" corresponding to the "comparative example" is "210.4", while the "total wastewater volume" corresponding to the "fourth embodiment" is "188.9". Therefore, the example shown in Figure 7 demonstrates that, for example, the "total wastewater volume" in the fourth embodiment is lower than in the comparative example, indicating that it is possible to reduce the wastewater capacity of the drainage equipment.

[0076] Furthermore, in the table shown in Figure 7, the "total wastewater volume" corresponding to the "comparative example" is "210.4", while the "total wastewater volume" corresponding to the "sixth embodiment" is "188.9". Therefore, the example shown in Figure 7 demonstrates that, for example, the "total wastewater volume" in the sixth embodiment is lower than in the comparative example, indicating that it is possible to reduce the wastewater capacity of the drainage equipment. [Explanation of Symbols]

[0077] 1: Valuable material 2: Solution 10: First processing system 11: First processing unit 20: Second processing system 21: Second processing unit 30: First collection system 40: Second collection system 50: Collection system 100: Collection equipment 200: Recovery equipment 300: Recovery equipment 400: Recovery equipment 500: Recovery equipment 600: Recovery System L1: Line L2: Line L3: Line L4: Line L5: Line L6: Line L11: Line L12: Line L21: Line L22: Line L31: Line L32: Line L41: Line L42: Line L51: Line L61: Line

Claims

1. The first processing system and The second processing system, A recovery system different from each of the first processing system and the second processing system, Equipped with, The first processing system comprises a first processing device that performs a predetermined process, including washing and dewatering, on valuable substances contained in the liquid to be processed to obtain a first processed product; a first supply channel for supplying the first processed product to the second processing system; and a first discharge channel for discharging first wastewater containing the first processed product, which is generated when separating the first processed product from the liquid to be processed. The second processing system comprises a second processing device that performs the predetermined processing on the first processing material to produce a second processing material, a second supply channel for supplying the second processing material to the outside of the second processing system, and a second discharge channel for discharging second wastewater containing the second processing material that is generated when separating the second processing material from the first processing material. The recovery system is a recovery facility that performs at least one of the following processes: a process for separating and recovering the first treated material contained in the first wastewater and a process for separating and recovering the second treated material contained in the second wastewater, and supplies the recovered treated material to at least one of the first and second treatment systems.

2. The aforementioned recovery system is A first recovery system that recovers the first treated material from the first wastewater and supplies the recovered first treated material to a first treatment system, The recovery equipment according to claim 1, comprising: a second recovery system for recovering the second treated material from the second wastewater and supplying the recovered second treated material to the second treatment system.

3. The aforementioned recovery system is A first recovery system that recovers the first treated material from the first wastewater and supplies the recovered first treated material to a first treatment system, The recovery equipment according to claim 1, comprising: a second recovery system for recovering the second treated material from the second wastewater and supplying the recovered second treated material to the first treatment system.

4. The aforementioned recovery system is A first recovery system that recovers the first treated material from the first wastewater and supplies the recovered first treated material to a second treatment system, The recovery equipment according to claim 1, comprising: a second recovery system for recovering the second treated material from the second wastewater and supplying the recovered second treated material to the first treatment system.

5. The aforementioned recovery system is A first recovery system that recovers the first treated material from the first wastewater and supplies the recovered first treated material to a second treatment system, The recovery equipment according to claim 1, comprising: a second recovery system for recovering the second treated material from the second wastewater and supplying the recovered second treated material to the second treatment system.

6. The recovery equipment according to claim 1, wherein the recovery system supplies the recovered first processed material and the recovered second processed material to the first processing system.

7. The recovery equipment according to claim 1, wherein the recovery system supplies the recovered first processed material and the recovered second processed material to the second processing system.

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