Waste by-pass treatment method and apparatus, waste treatment system

Abstract

The application discloses a waste bypass treatment method and device and a waste treatment system. The waste bypass treatment method comprises the following steps: separating organic matter and inorganic matter in waste treated by an anaerobic digestion device by using a separation device, wherein the separation device comprises one separation unit or a plurality of separation units connected in series; discharging the waste discharged from an overflow port of the separation device into an ultrasonic reactor for ultrasonic treatment; and conveying the waste treated by the ultrasonic treatment back to the anaerobic digestion device. The method can quickly realize efficient separation of the organic matter and the inorganic matter in the waste by using the separation device, and can realize structure cracking and even wall breaking of the waste with high organic matter content by using the ultrasonic reactor for ultrasonic treatment, so as to simultaneously improve the concentration of soluble organic matter and the biochemical degradability thereof, reduce the particle size of the waste, and further increase the organic matter conversion rate of the waste.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste resource utilization, in particular to a waste bypass treatment method, a waste bypass treatment device and a waste treatment system. BACKGROUND

[0002] Sludge is an inevitable by-product in the process of biochemical treatment of wastewater, and its treatment and disposal has always been a short board of wastewater treatment in China. Anaerobic digestion can realize the stabilization of easily decomposable organic matter in sludge and the recovery of biomass energy, and is the mainstream technology for sludge stabilization, reduction and resource utilization at home and abroad. However, only 35% to 50% of volatile solids (VS) are converted or degraded during the digestion process, and the remaining organic matter in the sludge residue may not be effectively utilized or may pollute the environment if it is disposed of by landfill. The organic matter in the sludge residue is mainly long-chain organic matter, such as palmitic acid, stearic acid and oleic acid, lignin, hemicellulose and cellulose, and other difficult-to-degrade organic matter. In addition, the pretreatment technology (thermal hydrolysis, ultrasonic, etc.) for the sludge is non-selective when it acts on the sludge, which not only acts on the difficult-to-biodegrade organic matter, but also acts on the easily biodegradable organic matter, resulting in low treatment efficiency and high energy consumption. Therefore, it is urgent to develop a treatment method to improve the stabilization and methanogenic performance of sludge, and realize the safe treatment and resource utilization of sludge. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the problems of poor efficiency of existing residual sludge pretreatment technology and low anaerobic digestion efficiency, so as to provide a waste bypass treatment method and device for promoting anaerobic energy conversion of waste, to improve the stabilization and methanogenic performance of waste, and realize the safe treatment and resource utilization of waste.

[0004] The present application provides a waste bypass treatment method, which comprises:

[0005] The organic matter and inorganic matter in the waste treated by the anaerobic digestion device are separated by using a separation device, wherein the separation device comprises a plurality of separation units, and the overflow port of one separation unit in the plurality of separation units is in communication with the feed port of the adjacent separation unit to connect the plurality of separation units in series; the waste is arranged to be capable of performing spiral motion in the separation cavity of the separation unit to realize the separation of organic matter and inorganic matter; the content of organic matter in the waste discharged from the overflow port of the separation unit is higher than that of the waste discharged from the underflow port of the separation unit.

[0006] The waste discharged from the overflow port of the separation device is discharged into an ultrasonic reactor for ultrasonic treatment.

[0007] The waste subjected to ultrasonic treatment is transported back to the anaerobic digestion device.

[0008] The separation device further comprises:

[0009] An outer cylinder, which is internally provided with at least one partition to separate the space in the outer cylinder into a plurality of separation chambers; and

[0010] A plurality of inner cones, which are correspondingly arranged in the plurality of separation chambers, and the small end of the inner cone is directed to the side where the feed inlet and the overflow outlet of the corresponding separation chamber are located, and the large end of the inner cone is close to the underflow outlet of the corresponding separation chamber.

[0011] In the waste bypass treatment method, the waste treated by the anaerobic digestion device enters the separation device for organic-inorganic separation treatment, part of the waste enters the ultrasonic reactor through the overflow outlet of the separation device for ultrasonic treatment, and the waste subjected to ultrasonic treatment is recovered to the anaerobic digestion device for reprocessing; wherein the volatile organic solid content in the waste discharged from the overflow outlet of the separation device after the waste is treated by the separation device is high, the enrichment of organic matter is realized, and the treatment efficiency of the ultrasonic reactor can be effectively improved; when the waste is subjected to ultrasonic treatment, the ultrasonic cavitation effect will mainly focus on the treatment of refractory substances, which can reduce the operating energy consumption of the ultrasonic reactor, improve the utilization rate of ultrasonic energy, and further promote the conversion rate of waste organic matter; part of the waste is discharged through the underflow outlet of the separation device, and the inorganic particulate matter content in this part of the waste is high, which further reduces the content of volatile organic solids in this part of the waste, and facilitates subsequent disposal and resource utilization.

[0012] The application also provides a waste bypass treatment device, comprising:

[0013] A separation device, comprising a plurality of separation units, the separation unit having a separation chamber, and a feed inlet, an underflow outlet and an overflow outlet communicating with the separation chamber, wherein the overflow outlet of one separation unit in the plurality of separation units communicates with the feed inlet of the adjacent separation unit to connect the plurality of separation units in series, the separation unit is arranged to separate organic matter and inorganic matter in the waste by spiral movement of the waste in the separation chamber of the separation unit, so that the content of organic matter in the waste discharged from the overflow outlet of the separation unit is higher than the content of organic matter in the waste discharged from the underflow outlet of the separation unit; and

[0014] An ultrasonic reactor, the inlet of the ultrasonic reactor communicates with the overflow outlet of the separation device, and the ultrasonic reactor is arranged to be capable of ultrasonic treatment of the waste;

[0015] The feed inlet of the separation device is arranged in communication with the discharge outlet of the anaerobic digestion device, and the outlet of the ultrasonic reactor is arranged in communication with the return material inlet of the anaerobic digestion device.

[0016] The separation device further comprises:

[0017] The outer cylinder is internally provided with at least one partition to divide the space in the outer cylinder into a plurality of separation cavities; and

[0018] A plurality of inner cones are arranged in the plurality of separation cavities in one-to-one correspondence, and the small end of the inner cone is directed to the side where the feed inlet and the overflow port corresponding to the separation cavity are located, and the large end of the inner cone is close to the underflow port corresponding to the separation cavity.

[0019] The application also provides a waste treatment system comprising an anaerobic digestion device and the above waste bypass treatment device, the feed inlet of the separation device of the waste bypass treatment device is in communication with the discharge outlet of the anaerobic digestion device, and the outlet of the ultrasonic reactor of the waste bypass treatment device is in communication with the return material inlet of the anaerobic digestion device.

[0020] Compared with the prior art, the embodiments of the application have the following technical effects:

[0021] 1. The embodiments of the application provide a waste bypass treatment method and device, which realizes rapid separation of organic matter-inorganic matter in waste and graded treatment of waste by using a combination of a separation device and an ultrasonic reactor, improves the operation efficiency of ultrasonic treatment, and further increases the organic matter conversion rate of waste.

[0022] 2. Compared with conventional waste anaerobic digestion, the waste bypass treatment method of the embodiments of the application effectively improves the methane production potential of waste, promotes the stabilization, reduction and harmlessness of waste, and is conducive to the subsequent disposal and resource utilization of waste.

[0023] 3. The waste bypass treatment method of the embodiments of the application is a physical method, the waste bypass treatment device has the advantages of high treatment efficiency, small occupation area, low cost, no secondary pollution, and strong adaptability to existing anaerobic digestion devices.

[0024] Other features and advantages of the application will be described in the subsequent description. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings are used to provide an understanding of the technical solutions of the application, and constitute a part of the specification, and are used to explain the technical solutions of the embodiments of the application together with the embodiments of the application, and do not constitute a limitation on the technical solutions of the application.

[0026] Figure 1A flowchart of a waste bypass treatment method according to an embodiment of the present application;

[0027] Figure 2 A structural diagram of a waste treatment system according to an embodiment of the present application;

[0028] Figure 3 A structural diagram of a separation device of a waste treatment system according to an embodiment of the present application;

[0029] Figure 4 A Figure 3 A working principle diagram of the separation device shown in the figure;

[0030] Figure 5 A comparison diagram of SCOD values in waste that has not been treated, has been treated by ultrasonic treatment, and has been treated by a waste treatment system according to an embodiment of the present application;

[0031] Figure 6 A comparison diagram of average particle sizes of waste that has not been treated, has been treated by ultrasonic treatment, and has been treated by a waste treatment system according to an embodiment of the present application;

[0032] Figure 7 A comparison diagram of methane production of waste that has not been treated, has been treated by ultrasonic treatment, and has been treated by a waste treatment system according to an embodiment of the present application;

[0033] Figure 8 A comparison diagram of methane production of waste that has been treated by anaerobic digestion, has been treated by anaerobic digestion and ultrasonic bypass treatment, and has been treated by anaerobic digestion and a waste treatment system according to an embodiment of the present application.

[0034] Reference signs:

[0035] 100 - first-stage separation unit, 200 - second-stage separation unit, 300 - separation device;

[0036] 1 - outer cylinder, 11 - first end wall, 12 - first separation cavity, 13 - second separation cavity, 14 - first feed inlet, 15 - first underflow outlet, 16 - first overflow outlet, 17 - second feed inlet, 18 - second underflow outlet, 19 - second overflow outlet, 110 - discharge outlet, 111 - second end wall;

[0037] 2 - first inner cone, 21 - first conical section, 22 - first cylindrical section;

[0038] 3 - second inner cone, 31 - second conical section, 32 - second cylindrical section;

[0039] 4 - helical body, 41 - cylindrical part, 411 - first communication cavity, 42 - helical blade, 43 - helical flow channel;

[0040] 5-Ultrasonic reactor, 51-First ultrasonic unit, 52-Second ultrasonic unit;

[0041] 6-Anaerobic digestion device. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other.

[0043] The following detailed description of this application is based on specific examples, but these examples should not be construed as limiting the application.

[0044] like Figure 1 As shown in the figure, this application provides a waste bypass treatment method, including the following steps:

[0045] Step S102: Separate the organic and inorganic matter in the waste treated by the anaerobic digester using a separation device. The separation device includes one or more separation units, with the overflow port of one of the separation units connected to the inlet of an adjacent separation unit, allowing the separation units to be connected in series. The waste is configured to undergo spiral motion within the separation chamber of the separation unit to achieve the separation of organic and inorganic matter. The organic matter content in the waste discharged from the overflow port of the separation unit is higher than the organic matter content in the waste discharged from the underflow port of the same separation unit.

[0046] Step S104: Discharge the waste discharged from the overflow port of the separation device into the ultrasonic reactor for ultrasonic treatment. When the separation device includes only one separation unit, the inlet and overflow port of that separation unit are the inlet and overflow port of the separation device, respectively. When the separation device includes multiple separation units connected in series, the inlet of the first separation unit is the inlet of the separation device, and the overflow port of the last separation unit is the overflow port of the separation device.

[0047] Step S106: The ultrasonically treated waste is transported back to the anaerobic digester.

[0048] The waste bypass treatment method in this application embodiment can, through Figure 2 The waste bypass treatment device shown is used to achieve this. In this waste bypass treatment device, the separation device 300 is used to separate the waste, and the ultrasonic reactor 5 is used to ultrasonically treat the waste. The waste can be sludge from the primary sedimentation tank of a municipal wastewater treatment plant, excess sludge, riverbed sediment, etc. Before bypass treatment, the waste is first anaerobic digested in the anaerobic digester 6, and then the separation device 300 is used to separate the waste.

[0049] The separation device 300 may include one or more (such as...) Figure 3 and Figure 4 The two separation units are shown. In the waste separation process, firstly, the waste treated by the anaerobic digester 6 is input into the first-stage separation unit 100 of the two separation units. The waste undergoes spiral motion within the separation chamber (i.e., the first separation chamber 12) of the first-stage separation unit 100 to separate organic and inorganic matter (such as inorganic sand particles). This results in a higher concentration of inorganic matter and a lower concentration of organic matter in the waste discharged from the underflow outlet (i.e., the first underflow outlet 15) compared to the waste entering the first-stage separation unit 100 through the inlet (i.e., the first inlet 14). The concentration of inorganic matter in the waste discharged from the overflow port (i.e., the first overflow port 16) decreases while the concentration of organic matter increases. Then, the waste discharged from the first overflow port 16 of the first-stage separation unit 100 can be input into the second-stage separation unit 200. The waste can undergo spiral motion in the separation chamber (i.e., the second separation chamber 13) of the second-stage separation unit 200, so that the second-stage separation unit 200 can further separate the organic and inorganic matter in the waste, so that the concentration of inorganic matter in the waste discharged from the overflow port (i.e., the second overflow port 19) of the second-stage separation unit 200 is further reduced while the concentration of organic matter is further increased, so as to further remove inorganic matter from the waste.

[0050] After the waste is separated by the separation device 300, part of the waste (high organic matter content) is discharged through the second overflow port 19 and enters the ultrasonic reactor 5 for ultrasonic treatment. The ultrasonic treatment uses high-frequency sound wave energy input and its cavitation effect to break down the structure of the waste and even break the cell walls, simultaneously increasing the concentration of soluble organic matter and its biochemical degradation, and reducing the particle size of the waste, so as to further promote the conversion rate of organic matter in the waste. Another part of the waste (high sand content) can be discharged through the biogas residue discharge pipeline through the first bottom outlet 15 and the second bottom outlet 18.

[0051] After being ultrasonically treated in the ultrasonic reactor 5, the waste can be transported back to the anaerobic digester 6. Due to the structural breakdown and even cell wall disruption of the waste after ultrasonic treatment, the concentration and biodegradability of soluble organic matter increase, and the particle size of the waste decreases. This facilitates further anaerobic digestion in the anaerobic digester 6 and accelerates the anaerobic digestion process, thereby further promoting the conversion rate of organic matter in the waste and improving the anaerobic digestion effect.

[0052] The waste bypass treatment method provided by the embodiments of the present application is that the waste treated by the anaerobic digestion device 6 enters the separation device 300 through the first feeding port 14 to be subjected to organic matter-inorganic matter separation treatment, part of the waste enters the ultrasonic reactor 5 through the second overflow port 19 to be subjected to ultrasonic treatment, and the waste subjected to ultrasonic treatment is recovered to the anaerobic digestion device 6 to be reprocessed. The volatile organic solid content in the waste discharged from the second overflow port 19 after the waste is treated by the separation device 300 is high, the enrichment of organic matter is realized, and the processing efficiency of the ultrasonic reactor 5 can be effectively improved; when the waste is subjected to ultrasonic treatment, the ultrasonic cavitation effect will mainly focus on the treatment of refractory substances, the operation energy consumption of the ultrasonic can be reduced, the utilization rate of ultrasonic energy can be improved, and the conversion rate of organic matter of the waste can be further promoted; part of the waste is discharged through the first underflow port 15 and the second underflow port 18, and the inorganic particulate matter content in the waste discharged from the second underflow port 18 is high, the content of volatile organic solids in the waste is further reduced, and the waste is easy to be disposed and recycled.

[0053] The waste bypass treatment method provided by the embodiments of the present application realizes efficient treatment of waste according to quality, and the pretreatment methods are all physical methods, which have the advantages of high efficiency and no secondary pollution.

[0054] In some example embodiments, the ultrasonic reactor 5 can include one or more ultrasonic units, which can be pipe rod type ultrasonic units, and a plurality of pipe rod type ultrasonic units can be connected in series. Of course, the ultrasonic unit can also be in other forms other than the pipe rod type. For example, Figure 2 As shown in the figure, the ultrasonic reactor 5 can include two ultrasonic units: a first ultrasonic unit 51 and a second ultrasonic unit 52, and the first ultrasonic unit 51 and the second ultrasonic unit 52 are connected in series.

[0055] Therefore, when the ultrasonic treatment is performed, the working parameters of the pipe rod type ultrasonic unit can be: power: 0-1000 W; ultrasonic frequency: 20-40 kHz; power density: 0.4-1.2 W / mL; and waste residence time: 5-60 s.

[0056] The pipe rod type ultrasonic unit adopts the above working parameters to perform ultrasonic treatment on waste with high organic matter content, which can effectively realize the structure breaking of the waste, even the breaking of the wall, so as to increase the concentration of dissolved organic matter and the biodegradability, reduce the particle size of the waste, and further promote the conversion rate of organic matter of the waste.

[0057] Of course, the working parameters of the pipe rod type ultrasonic unit are not limited to the above range, and can be adjusted according to actual needs.

[0058] In some example embodiments, the pressure of the waste input into the separation device 300 (i.e. the pressure of the waste input into the first feed inlet 14 of the first stage separation unit 100) is 0.2 MPa to 0.5 MPa, such as 0.3 MPa.

[0059] The pressure of the waste input into the first feed inlet 14 of the first stage separation unit 100 is 0.2 MPa to 0.5 MPa, so that efficient and effective separation treatment of the waste is achieved by the two-stage separation unit, so as to improve the organic matter content of the overflow waste after treatment by the two-stage separation unit.

[0060] In some example embodiments, the anaerobic digestion treatment is a mesophilic anaerobic digestion treatment, and the working parameters are: temperature of 37±0.5°C, and residence time of 12-20 days, according to actual needs.

[0061] Of course, the temperature and residence time of the anaerobic digestion treatment are not limited to the above ranges, and can be adjusted according to actual needs.

[0062] As shown in Figures 2-4 The present application also provides a waste bypass treatment device, which comprises the separation device 300 and the ultrasonic reactor 5.

[0063] The separation device 300 comprises one separation unit or a plurality of separation units, each of which has a separation cavity, and a feed inlet, an underflow outlet and an overflow outlet in communication with the separation cavity. The overflow outlet of one of the plurality of separation units is in communication with the feed inlet of the adjacent separation unit to connect the plurality of separation units in series. The separation unit is arranged to separate the organic matter from the inorganic matter in the waste by the spiral movement of the waste in the separation cavity of the separation unit, so that the content of the organic matter in the waste discharged from the overflow outlet of the separation unit is higher than that in the waste discharged from the underflow outlet of the separation unit.

[0064] The inlet of the ultrasonic reactor 5 is in communication with all the overflow outlets of the separation device 300, and the ultrasonic reactor 5 is arranged to be capable of ultrasonic treatment of the waste. The feed inlet of the separation device 300 is arranged to be in communication with the discharge outlet of the anaerobic digestion device 6, and the outlet of the ultrasonic reactor 5 is arranged to be in communication with the back feed inlet of the anaerobic digestion device 6.

[0065] The waste bypass treatment device processes the waste after the anaerobic digestion device 6, and the waste is first separated into organic matter and inorganic matter by a separation unit or a plurality of separation units connected in series; then, the overflow waste (high organic matter content) discharged from the overflow port of the separation device 300 is discharged into the ultrasonic reactor 5, and the waste is treated by the ultrasonic reactor. Through the input of high-frequency acoustic energy and its cavitation effect, the structure of the waste is broken, even broken, the concentration of dissolved organic matter is simultaneously increased, and the biochemical degradability is improved, the particle size of the waste is reduced, and then the waste is conveniently recycled to the anaerobic digestion device 6 for further anaerobic digestion treatment. The waste after ultrasonic treatment is recycled to the anaerobic digestion device 6 for further anaerobic digestion treatment to further promote the conversion rate of organic matter in the waste.

[0066] In some example embodiments, the separation device includes a plurality of separation units, and further includes: an outer cylinder 1 and a plurality of inner cones.

[0067] The outer cylinder 1 is provided with at least one partition to divide the space in the outer cylinder into a plurality of separation cavities. The outer cylinder 1 can be a cylindrical cylinder. Of course, the outer cylinder 1 can also be a non-cylindrical cylinder.

[0068] The plurality of inner cones are correspondingly arranged in the plurality of separation cavities, and the small end of the inner cone is directed to the side where the feed port and the overflow port of the corresponding separation cavity are located, and the large end of the inner cone is close to the underflow port of the corresponding separation cavity.

[0069] When the separation device 300 works, the waste enters the separation cavity of the separation unit and rotates spirally. Under the action of the inner cone in the separation cavity, the spiral flow is divided into two parts, one part (outer spiral flow) moves to the underflow port of the separation cavity and is discharged from the underflow port, and the other part (inner spiral flow) moves to the overflow port of the separation cavity and is discharged from the overflow port. In the separation cavity, the basic principle of separation of inorganic matter and organic matter is centrifugal sedimentation. The inorganic matter moves to the inner wall of the outer cylinder 1 and is discharged from the underflow port with the outer spiral flow due to the larger centrifugal force; the organic matter is discharged from the overflow port with the inner spiral flow due to the smaller centrifugal force, so that the organic matter and the inorganic matter in the waste are separated, and the organic matter content in the waste discharged from the overflow port is high and the inorganic matter content is low, and the organic matter content in the waste discharged from the underflow port is low and the inorganic matter content is high.

[0070] In some embodiments, as Figure 3 and Figure 4As shown, the partition includes a spiral body 4, which includes a cylindrical portion 41 and spiral vanes 42 arranged between the outer sidewall surface of the cylindrical portion 41 and the inner sidewall surface of the outer cylinder 1 to form a spiral flow channel 43, the inlet of the spiral flow channel 43 being in communication with the overflow port of the separation chamber on one side of the partition, and the outlet of the spiral flow channel 43 being in communication with the feed port of the separation chamber on the other side of the partition.

[0071] The partition in the outer cylinder 1 includes a spiral body 4, which has an annular cavity between the cylindrical portion 41 of the spiral body 4 and the inner sidewall surface of the outer cylinder 1, the annular cavity being divided into a spiral flow channel 43 by the spiral vanes 42, and the inlet of the spiral flow channel 43 being in communication with the overflow port of the separation chamber on one side of the partition, and the outlet of the spiral flow channel 43 being in communication with the feed port of the separation chamber on the other side of the partition, so that the waste discharged from the overflow port of the separation chamber on one side of the partition first enters the spiral flow channel 43 to perform spiral motion, and then enters the separation chamber on the other side of the partition, so as to realize spiral separation of the waste in the other separation chamber.

[0072] The partition realizes the communication between the overflow port and the feed port of the adjacent separation chambers on both sides of the partition, that is, realizes the series connection of the two adjacent separation units, and further facilitates the sequential series connection of multiple separation units by at least one partition. And by the arrangement of the spiral flow channel 43, the waste discharged from the spiral flow channel 43 into the separation chamber of the next stage separation unit is facilitated to perform spiral motion, so as to realize the separation of organic matter and inorganic matter of the waste in the separation chamber.

[0073] In some exemplary embodiments, the separation device 300 includes two separation units, two inner cones and one partition.

[0074] The two separation units are a first-stage separation unit 100 and a second-stage separation unit 200, respectively.

[0075] The first-stage separation unit 100 has a first separation chamber (the separation chamber of the first-stage separation unit) 12, and a first feed port (the feed port of the first-stage separation unit) 14, a first underflow port (the underflow port of the first-stage separation unit) 15 and a first overflow port (the overflow chamber of the first-stage separation unit) 16 in communication with the first separation chamber 12, and the second-stage separation unit 200 has a second separation chamber (the separation chamber of the second-stage separation unit) 13, and a second feed port (the feed port of the second-stage separation unit) 17, a second underflow port (the underflow port of the second-stage separation unit) 18 and a second overflow port (the overflow chamber of the second-stage separation unit) 19 in communication with the second separation chamber 13, wherein the first overflow port 16 is in communication with the inlet of the spiral flow channel 43, the second feed port 17 is in communication with the outlet of the spiral flow channel 43, and the second overflow port 19 is in communication with the inlet of the ultrasonic reactor 5.

[0076] The two inner cones are the first inner cone 2 and the second inner cone 3. The first inner cone 2 is disposed in the first separation chamber 12, and the small end of the first inner cone 2 faces the side where the first feed port 14 and the first overflow port 16 are located, while the large end of the first inner cone 2 is close to the first underflow port 15.

[0077] The second inner cone 3 is disposed in the second separation chamber 13, with the small end of the second inner cone 3 facing the side where the second feed port 17 and the second overflow port 19 are located, and the large end of the second inner cone 3 is close to the second underflow port 18.

[0078] like Figure 3 and Figure 4 As shown, when the separation device 300 is working, the waste treated by anaerobic digestion can enter the first separation chamber 12 through the first feed inlet 14 and move in a spiral motion. The waste rotates in the first separation chamber 12, generating a spiral flow. Under the action of the first inner cone 2, the spiral flow is divided into two parts, one part of the spiral flow (such as...) Figure 4 The outer spiral flow (as shown in M1) moves towards the first underflow outlet 15 and is discharged from the first underflow outlet 15, while the other part of the spiral flow (such as...) Figure 4 The internal spiral flow (M2) flows towards the first overflow port 16 and is discharged from the first overflow port 16. Within the first separation chamber 12, both the external spiral flow M1 and the internal spiral flow M2 exist simultaneously to achieve the separation of organic and inorganic matter in the waste.

[0079] After primary separation by the first-stage separation unit 100, the waste material discharged from the first overflow port 16 passes through the spiral channel 43 and then enters the second separation chamber 13 through the second inlet 17, where it undergoes spiral motion. The waste material rotates within the second separation chamber 13, generating a spiral flow. Under the action of the second inner cone 3, this spiral flow is divided into two parts: one part is the spiral flow (such as...) Figure 4 The external spiral flow (as shown in M3) moves towards the second underflow port 18 and is discharged from the second underflow port 18, while another part of the spiral flow (such as...) Figure 4 The internal spiral flow (M4) moves towards the second overflow port 19 and is discharged from the second overflow port 19. In the second separation chamber 13, the external spiral flow M3 and the internal spiral flow M4 exist simultaneously to achieve the further separation of organic and inorganic matter in the waste.

[0080] After two stages of separation by the first separation unit 100 and the second separation unit 200, the waste discharged from the first underflow port 15 of the first separation unit 100 and the second underflow port 18 of the second separation unit 200 can be discharged through the biogas residue discharge pipeline, and the waste discharged from the second overflow port 19 can be discharged into the ultrasonic reactor 5 for ultrasonic treatment.

[0081] In some exemplary embodiments, such as Figure 3 andFigure 4 As shown, the cylindrical part 41 of the partition is provided with a first communication cavity 411, the outer cylinder 1 is provided with a discharge port 110, and the second overflow port 19 is arranged on the cylindrical part 41 and communicates with the discharge port 110 through the first communication cavity 411.

[0082] The cylindrical part 41 of the spiral body 4 is provided with a first communication cavity 411, and the second overflow port 19 can communicate with the discharge port 110 on the outer cylinder 1 through the first communication cavity 411, so that the waste overflowing from the second overflow port 19 is discharged from the discharge port 110 after passing through the first communication cavity 411.

[0083] In some example embodiments, as shown in Figure 3 and Figure 4 As shown, the first inner cone 2 includes a first conical section 21 and a first cylindrical section 22, the small end of the first conical section 21 is directed towards the partition, one end of the first cylindrical section 22 is connected to the large end of the first conical section 21, and the other end of the first cylindrical section 22 is connected to the second end wall 111 of the outer cylinder 1; the second inner cone 3 includes a second conical section 31 and a second cylindrical section 32, the small end of the second conical section 31 is directed towards the partition, one end of the second cylindrical section 32 is connected to the large end of the second conical section 31, and the other end of the second cylindrical section 32 is connected to the first end wall 11 of the outer cylinder 1, and the first end wall 11 of the outer cylinder 1 is arranged opposite to the second end wall 111. Wherein, the first conical section 21 and the second conical section 31 can be conical, and the first cylindrical section 22 and the second cylindrical section 32 can be cylindrical; the first end wall 11 and the second end wall 111 of the outer cylinder 1 can be upper end wall and lower end wall respectively.

[0084] The first feed port 14, the first underflow port 15 and the second underflow port 18 are all arranged on the side wall of the outer cylinder 1, and the first feed port 14 and the discharge port 110 are both close to the partition and arranged opposite to each other, the first underflow port 15 is close to the second end wall 111 of the outer cylinder 1, and the second underflow port 18 is close to the first end wall 11 of the outer cylinder 1.

[0085] In the separation device 300, the second inner cone 3, the partition and the first inner cone 2 can be arranged in sequence from top to bottom, and the small end of the first inner cone 2 is directed upwards, the small end of the second inner cone 3 is directed downwards, and the small ends of the first inner cone 2 and the second inner cone 3 are both directed towards the partition, so that the first inner cone 2 and the second inner cone 3 can be arranged substantially symmetrically. The first feed port 14 and the discharge port 110 can be located in the middle of the side wall of the outer cylinder 1 and arranged opposite to each other; the first underflow port 15 can be located in the lower part of the side wall of the outer cylinder 1 and close to the lower end wall (the second end wall 111) of the outer cylinder 1; and the second underflow port 18 can be located in the upper part of the side wall of the outer cylinder 1 and close to the upper end wall (the first end wall 11) of the outer cylinder 1.

[0086] The separation device 300 has the advantages of simple structure, compactness, small footprint, high separation efficiency, low operation and maintenance cost, etc., and does not need to add reagents, thereby realizing low-consumption and high-efficiency separation technology.

[0087] In some embodiments, as shown in Figure 3 The size of the separation device 300 satisfies at least one of the following:

[0088] The inner diameter D of the outer cylinder 1 is 50 mm ≤ D ≤ 250 mm;

[0089] The diameter d of the first feed port 14 is d ≤ 0.25 D;

[0090] The diameter O1 of the first overflow port 16 is O1 ≤ 0.25 D, and the diameter O2 of the second overflow port 19 is O2 ≤ 0.25 D;

[0091] One end of the first overflow port 16 extends into the first separation cavity 12, and the length l1 of the extension into the first separation cavity 12 is 0.4D ≤ l1 ≤ 0.8 D. One end of the second overflow port 19 extends into the second separation cavity 13, and the length l2 of the extension into the second separation cavity 13 is 0.4D ≤ l2 ≤ 0.8D;

[0092] The diameter U1 of the first underflow port 15 is U1 ≤ 0.15 D, and the diameter U2 of the second underflow port 18 is U2 ≤ 0.15 D;

[0093] The diameter F of the discharge port 110 is F ≥ O2;

[0094] The distance L1 between the partition and the large end of the first conical section 21 is 3.0D ≤ L1 ≤ 6.0D, and the distance L2 between the partition and the large end of the second conical section 31 is 3.0D ≤ L2 ≤ 6.0D;

[0095] The diameter D1 of the large end of the first conical section 21 is D1 ≤ 0.80 D, and the diameter D2 of the large end of the second conical section 31 is D2 ≤ 0.80 D;

[0096] The height h1 of the first conical section 21 is 2.0D ≤ h1 ≤ 3.5D, and the height h2 of the second conical section 31 is 2.0D ≤ h2 ≤ 3.5D;

[0097] The height G1 of the first cylindrical section 22 is 0.5D1 ≤ G1 ≤ 1.5D1, and the height G2 of the second cylindrical section 32 is 0.5D2 ≤ G2 ≤ 1.5D2;

[0098] The taper angle θ1 of the first tapered section 21 is 16° ≤ θ1 ≤ 24°, and the taper angle θ2 of the second tapered section 31 is 16° ≤ θ2 ≤ 24°.

[0099] The number of turns of the helical blade 42 is 2-6.

[0100] The helix angle β of the helical blade 42 is 0° ≤ β ≤ 30°.

[0101] The outer diameter N of the cylindrical section 41 is N ≤ 0.80 D.

[0102] Of course, the dimensions of the separation device 300 are not limited to the above ranges, and can be adjusted according to actual needs.

[0103] It should be understood that the "diameter" mentioned above can refer to the diameter of a component, structure, etc. in the case of a cylindrical or circular shape, or can refer to the equivalent diameter of a component, structure, etc. in the case of a non-cylindrical or non-circular shape.

[0104] In some example embodiments, as shown in Figure 3 and Figure 4 , the first feed inlet 14 is tangentially arranged with the first separation cavity 12, so that the waste forms a helical motion in the first separation cavity 12, achieving separation of the waste.

[0105] Of course, the first feed inlet 14 and the first separation cavity 12 can also be arranged to be not tangential, but to achieve helical motion of the waste in the first separation cavity 12 by arranging a helical flow channel (such as the helical flow channel 43 in the second separation cavity 13) in the first separation cavity 12.

[0106] In some example embodiments, as shown in Figure 3 and Figure 4 , the first underflow outlet 15 can be tangentially arranged with the first separation cavity 12, and the second underflow outlet 18 can be tangentially arranged with the second separation cavity 13, so that the waste is discharged through the first underflow outlet 15 and the second underflow outlet 18, respectively.

[0107] In some example embodiments, the separation device 300 further comprises a delivery pump (not shown), the outlet of the delivery pump is connected with the first feed inlet 14, and the delivery pump is arranged so that the pressure of the waste input into the first feed inlet 14 is 0.2 MPa to 0.5 MPa. Among them, the delivery pump device that applies working pressure to the waste can be a submersible pump, a rotor pump, or other mechanical devices for delivering fluid.

[0108] In some example embodiments, each discharge outlet (such as the first underflow outlet 15, the second underflow outlet 18, and the discharge outlet 110 in Figure 3 and Figure 4 ) of the separation device 300 is equipped with an electric valve to achieve adjustment of the discharge flow of the waste.

[0109] In some example embodiments, the material of the separation device 300 is cast iron or stainless steel. Of course, other materials can also be used for the separation device 300 according to actual conditions.

[0110] In some example embodiments, the axis of the outer cylinder 1 can be perpendicular to the horizontal plane to achieve a vertical installation of the separation device 300, as shown in FIG. 1; or the axis of the outer cylinder 1 can be inclined relative to the horizontal plane to achieve an inclined installation of the separation device 300; or the axis of the outer cylinder 1 can be parallel to the horizontal plane to achieve a horizontal installation of the separation device 300. Figures 2-4

[0111] In some example embodiments, the underflow ports (e.g., the first underflow port 15 and the second underflow port 18) of the separation units can be in communication with a sludge discharge pipeline to discharge waste with high inorganic content (e.g., high sand content).

[0112] In some example embodiments, the ultrasonic reactor 5 includes one or more ultrasonic units, and the plurality of ultrasonic units are connected in series. The ultrasonic unit is a tube rod type ultrasonic unit. As shown in FIG. 2, the ultrasonic reactor 5 can include two ultrasonic units: a first ultrasonic unit 51 and a second ultrasonic unit 52, and the first ultrasonic unit 51 and the second ultrasonic unit 52 are connected in series. Figure 2

[0113] The number of tube rod type ultrasonic units in the ultrasonic reactor 5 can be determined according to the processing capacity of the waste, and the plurality of tube rod type ultrasonic units can be arranged in series.

[0114] In some example embodiments, the ultrasonic reactor 5 is provided in plurality, and the plurality of ultrasonic reactors 5 are connected in parallel.

[0115] In some example embodiments, the separation device 300 is provided in plurality, and the plurality of separation devices 300 are connected in parallel.

[0116] According to the processing capacity of the waste, when the processing capacity of the waste is relatively large, the ultrasonic reactor 5 and / or the separation device 300 can be provided in plurality, and the plurality of ultrasonic reactors 5 are operated in parallel, and the plurality of separation devices 300 are operated in parallel.

[0117] The example embodiments also provide a waste treatment system, which includes an anaerobic digestion device and the waste bypass treatment device of any of the above example embodiments. The feed inlet (e.g., the first feed inlet 14) of the separation device 300 of the waste bypass treatment device is in communication with the discharge port of the anaerobic digestion device 6, and the outlet of the ultrasonic reactor 5 of the waste bypass treatment device is in communication with the feed return port of the anaerobic digestion device 6.

[0118] ​​The waste processing system of the embodiment of the present application can separate the organic matter and inorganic matter of the waste by using the separation device 300 of the waste bypass processing device, and can realize structure breaking and even wall breaking of the waste by using the ultrasonic reactor 5 of the waste bypass processing device, so that the concentration and biodegradability of the dissolved organic matter are increased, and the particle size of the waste is reduced, thereby facilitating further anaerobic digestion treatment of the waste in the anaerobic digestion device 6; the waste treated by the ultrasonic treatment can be returned to the anaerobic digestion device 6 for further anaerobic digestion treatment, thereby accelerating the anaerobic digestion process of the waste, reducing the reaction time of the anaerobic digestion of the waste, and further promoting the conversion rate of the organic matter of the waste, and improving the anaerobic digestion effect of the waste.

[0119] In some exemplary embodiments, the anaerobic digestion device 6 can be an anaerobic digester or an anaerobic digestion tank. The shape of the anaerobic digestion device can be a thin and high columnar cone shape, a thick and short columnar cone shape, or an oval shape, etc. full-mixed anaerobic reactor.

[0120] The effects of the waste bypass processing method and device of the present application will be described below in combination with two specific embodiments.

[0121] Embodiment one:

[0122] As shown in Figures 2-4 , the present embodiment provides a waste bypass processing device which can promote anaerobic energy conversion of the waste and realize grading separation and conditioning treatment of the waste. The waste bypass processing device comprises a separation device 300 and an ultrasonic reactor 5 connected in sequence. The separation device 300 of the waste bypass processing device can be located on the biogas residue discharge pipeline of the anaerobic digestion device 6, and the waste entering the separation device 300 can be the biogas residue treated by the anaerobic digestion device 6.

[0123] The waste treated by the anaerobic digestion device 6 enters the separation device 300 through the first feed port 14 to perform the separation treatment of the organic matter and inorganic matter of the biogas residue, part of the waste enters the ultrasonic reactor 5 through the second overflow port 19 to perform ultrasonic treatment, and is recovered to the anaerobic digestion device 6 for further treatment; part of the waste is discharged through the first underflow port 15 and the second underflow port 18, and enters the subsequent disposal and resource utilization stage.

[0124] As shown in Figure 3 and Figure 4As shown, in the present embodiment, the structural parameters of the separation device 300 are as follows: the inner diameter D of the outer cylinder 1 is 80 mm; the diameter d of the first feed port 14 is 20 mm; the diameter D1 of the large end of the first conical section 21 is 64 mm, and the diameter D2 of the large end of the second conical section 31 is 60 mm; the diameter O1 of the first overflow port 16 is 16 mm, and the diameter O2 of the second overflow port 19 is 12 mm; the diameter U1 of the first underflow port 15 is 8 mm, and the diameter U2 of the second underflow port 18 is 6 mm; the length l1 of the first overflow port 16 extending into the first separation cavity 12 is 55 mm, and the length l2 of the second overflow port 19 extending into the second separation cavity 13 is 35 mm; the length L1 of the first separation cavity 12 is 320 mm, and the length L2 of the second separation cavity 13 is 250 mm; the height h1 of the first conical section 21 is 230 mm, and the height h2 of the second conical section 31 is 170 mm; the taper angle θ1 of the first conical section 21 is 16°, and the taper angle θ2 of the second conical section 31 is 20°; the number of turns of the spiral blade 42 is 4; the spiral angle β of the spiral blade 42 is 10°; the outer diameter N of the cylindrical portion 41 of the partition is 64 mm; the height G1 of the first cylindrical section 22 is 40 mm, and the height G2 of the second cylindrical section 32 is 35 mm.

[0125] In the present embodiment, the pressure of the waste input into the first feed port 14 of the first-stage separation unit 100 (i.e., the working pressure or driving pressure of the separation device 300, the device applying the pressure being a delivery pump) is 0.35 MPa.

[0126] In the present embodiment, the overflow port (the second overflow port 19) of the separation device 200 is in communication with the inlet of the ultrasonic reactor 5, which includes a plurality of tube-and-stick ultrasonic units, wherein the number of tube-and-stick ultrasonic units can be two, the power of a single tube-and-stick ultrasonic unit can be 1000 W, the ultrasonic frequency can be 26 kHz, the power density can be 0.8 W / mL, and the residence time of the sludge is 50 s.

[0127] The experimental results of treating waste using the waste bypass treatment device of the present embodiment are as follows:

[0128] Figures 5-7 The effects of ultrasonic treatment, separation + ultrasonic combined treatment on the soluble chemical oxygen demand (SCOD), particle size, and methane potential of anaerobic digestion biogas residue are shown.

[0129] As Figure 5As shown, the SCOD of untreated biogas residue is 2167 mg / L, the SCOD of biogas residue after ultrasonic treatment is 2973 mg / L, and the SCOD of biogas residue after separation and ultrasonic combined treatment by the waste bypass treatment device of this embodiment is 2923 mg / L. That is, the SCOD of biogas residue after ultrasonic treatment and separation and ultrasonic combined treatment increased from 2167 mg / L to 2973 and 2923 mg / L, respectively.

[0130] like Figure 6 As shown, the particle size (average particle size) of untreated biogas residue is 15.08 μm, the particle size of biogas residue after ultrasonic treatment is 7.36 μm, and the particle size of biogas residue after treatment by the waste bypass treatment device (separation + ultrasonic) in this embodiment is 5.09 μm. That is, the particle size of biogas residue after ultrasonic treatment and separation + ultrasonic combined treatment is reduced from 15.08 μm to 7.36 and 5.09 μm, respectively.

[0131] like Figure 7 As shown, the methanogenesis potential of untreated biogas residue is 25.54 N mL / g-VS, the methanogenesis potential of biogas residue after ultrasonic treatment is 39.01 N mL / g-VS, and the methanogenesis potential of biogas residue after treatment by the waste bypass treatment device (separation + ultrasonication) in this embodiment is 43.77 N mL / g-VS. That is, the methanogenesis potential of biogas residue increases from 25.54 N mL / g-VS to 39.01 and 43.77 N mL / g-VS, respectively.

[0132] The results show that the waste bypass treatment device in this embodiment can change the physicochemical properties of the biogas residue, causing the biogas residue to decompose and release internal organic matter, significantly improving the SCOD of the biogas residue, reducing the particle size of the biogas residue, and significantly improving the methanogenic potential of the biogas residue.

[0133] Example 2:

[0134] This embodiment provides a waste bypass treatment method, which can use the waste bypass treatment device in Embodiment 1 to reprocess waste.

[0135] The first inlet 14 of the separation device 300 of the waste bypass treatment device is connected to the outlet of the anaerobic digester 6, and the outlet of the ultrasonic reactor 5 of the waste bypass treatment device is connected to the return port of the anaerobic digester 6, so as to return the ultrasonically treated waste to the anaerobic digester 6 for anaerobic digestion treatment.

[0136] In this embodiment, the sludge concentration of the feed sludge of the anaerobic reactor 6 is 43.51 g / L.

[0137] like Figure 8As shown, the methane production of the sludge treated by the anaerobic digestion device 6 is 141.34 N mL / g-VS; the methane production of the sludge treated by the anaerobic digestion device 6 and the ultrasonic bypass of the ultrasonic reactor 5 is 160.79 N mL / g-VS; and the methane production of the sludge treated by the anaerobic digestion device 6, the separation device 300 and the ultrasonic bypass of the ultrasonic reactor 5 is 169.14 N mL / g-VS. The results show that the waste bypass treatment method of the embodiment can increase the conversion rate of organic matter in the sludge, improve the gas production of the sludge anaerobic digestion, promote the stabilization, reduction and harmlessness of the sludge, and is conducive to the disposal and resource utilization of the sludge residue.

[0138] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0139] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0140] In the description of the present application, the meaning of "a plurality of" is at least two, for example: two, three, etc., unless otherwise explicitly specified and limited.

[0141] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0142] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0143] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "certain embodiments", etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearance of the above terms in various places in the specification is not intended to be taken to mean that the same embodiment or example is being referred to simply because of the term's appearance in the specification. In addition, the described particular feature, structure, material or characteristic can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described in the specification can be combined or recombined in any suitable manner in different embodiments or examples, and in the same embodiment or example, without departing from the scope of the present application.

[0144] Although the embodiments of the present application have been shown and described above, it is to be understood that the above-described embodiments are exemplary, and are not to be construed as limiting the present application, and that changes, modifications, substitutions and variations can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A waste bypass treatment method, characterized in that, include: A separation device is used to separate organic and inorganic matter in waste treated by an anaerobic digester. The separation device includes multiple separation units, and the overflow port of one of the separation units is connected to the inlet of an adjacent separation unit so that the multiple separation units are connected in series. The waste is configured to undergo spiral motion within the separation chamber of the separation unit to achieve the separation of organic and inorganic matter. The organic matter content in the waste discharged from the overflow port of the separation unit is higher than the organic matter content in the waste discharged from the underflow port of the separation unit. The waste discharged from the overflow port of the separation device is discharged into an ultrasonic reactor for ultrasonic treatment; The ultrasonically treated waste is then transported back to the anaerobic digester. The separation device further includes: An outer cylinder, having at least one internal partition to divide the space within the outer cylinder into multiple separation chambers; and Multiple inner cones are arranged one-to-one in the multiple separation chambers, with the small end of the inner cone facing the side where the feed port and overflow port are connected to the corresponding separation chamber, and the large end of the inner cone close to the bottom flow port connected to the corresponding separation chamber.

2. The waste bypass treatment method according to claim 1, characterized in that, The ultrasonic reactor comprises a single tubular ultrasonic unit or multiple tubular ultrasonic units connected in series. The operating parameters of the tubular ultrasonic unit are: power: 0-1000 W; ultrasonic frequency: 20-40 kHz; power density: 0.4-1.2 W / mL; waste residence time: 5-60 s; and / or The pressure of the waste input to the separation device is 0.2 MPa to 0.5 MPa.

3. A waste bypass treatment device, characterized in that, include: A separation device includes multiple separation units, each having a separation chamber and an inlet, a bottom outlet, and an overflow outlet communicating with the separation chamber. The overflow outlet of one of the multiple separation units is connected to the inlet of an adjacent separation unit, allowing the multiple separation units to be connected in series. Each separation unit is configured to separate organic and inorganic matter from waste through a spiral motion within its separation chamber, such that the organic matter content in the waste discharged from the overflow outlet of a separation unit is higher than the organic matter content in the waste discharged from the bottom outlet of that separation unit. An ultrasonic reactor, wherein the inlet of the ultrasonic reactor is connected to the overflow port of the separation device, and the ultrasonic reactor is configured to perform ultrasonic treatment on waste. The feed inlet of the separation device is configured to connect with the discharge outlet of the anaerobic digester, and the outlet of the ultrasonic reactor is configured to connect with the return inlet of the anaerobic digester. The separation device further includes: An outer cylinder, having at least one internal partition to divide the space within the outer cylinder into multiple separation chambers; and Multiple inner cones are arranged one-to-one in the multiple separation chambers, with the small end of the inner cone facing the side where the feed port and overflow port are connected to the corresponding separation chamber, and the large end of the inner cone close to the bottom flow port connected to the corresponding separation chamber.

4. The waste bypass treatment device according to claim 3, characterized in that, The axis of the outer cylinder is perpendicular to the horizontal plane; or, the axis of the outer cylinder is inclined relative to the horizontal plane; or, the axis of the outer cylinder is parallel to the horizontal plane.

5. The waste bypass treatment device according to claim 4, characterized in that, The separator includes a spiral body, which includes a cylindrical portion and spiral blades. The spiral blades are disposed between the outer wall of the cylindrical portion and the inner wall of the outer cylinder to form a spiral flow channel. The inlet of the spiral flow channel is connected to the overflow port of the separation chamber on one side of the separator, and the outlet of the spiral flow channel is connected to the feed port of the separation chamber on the other side of the separator.

6. The waste bypass treatment device according to claim 5, characterized in that, The separation device includes two separation units, two inner cones, and one partition. The two separation units are a first-stage separation unit and a second-stage separation unit, respectively. The overflow port of the first-stage separation unit is connected to the inlet of the spiral flow channel, the feed port of the second-stage separation unit is connected to the outlet of the spiral flow channel, and the overflow port of the second-stage separation unit is connected to the inlet of the ultrasonic reactor. The two inner cones are a first inner cone and a second inner cone. The first inner cone is disposed in the separation chamber of the first-stage separation unit, with the small end of the first inner cone facing the side where the feed inlet and overflow outlet of the first-stage separation unit are located, and the large end of the first inner cone is close to the bottom outlet of the first-stage separation unit. The second inner cone is disposed in the separation chamber of the second-stage separation unit, with the small end of the second inner cone facing the side where the feed inlet and overflow outlet of the second-stage separation unit are located, and the large end of the second inner cone is close to the bottom outlet of the second-stage separation unit.

7. The waste bypass treatment device according to claim 6, characterized in that, The cylindrical part is provided with a first connecting cavity, the outer cylinder is provided with a discharge port, the overflow port of the second-stage separation unit is provided in the cylindrical part, and the overflow port of the second-stage separation unit is connected to the discharge port through the first connecting cavity.

8. The waste bypass treatment device according to claim 7, characterized in that, The first inner cone includes a first conical segment and a first cylindrical segment. The small end of the first conical segment faces the separator. One end of the first cylindrical segment is connected to the large end of the first conical segment, and the other end of the first cylindrical segment is connected to the second end wall of the outer cylinder. The second inner cone includes a second conical section and a second cylindrical section. The small end of the second conical section faces the separator. One end of the second cylindrical section is connected to the large end of the second conical section. The other end of the second cylindrical section is connected to the first end wall of the outer cylinder. The first end wall and the second end wall of the outer cylinder are arranged opposite to each other. The feed inlet of the first-stage separation unit, the underflow outlet of the first-stage separation unit, and the underflow outlet of the second-stage separation unit are all located on the side wall of the outer cylinder. The feed inlet of the first-stage separation unit and the discharge outlet are both close to the separator and are arranged opposite to each other. The underflow outlet of the first-stage separation unit is close to the second end wall of the outer cylinder, and the underflow outlet of the second-stage separation unit is close to the first end wall of the outer cylinder.

9. The waste bypass treatment device according to claim 8, characterized in that, The dimensions of the separation device satisfy at least one of the following: The inner diameter D of the outer cylinder is: 50 mm ≤ D ≤ 250 mm; The diameter d of the feed inlet of the first-stage separation unit is: d ≤ 0.25 D; The diameter O1 of the overflow port of the first-stage separation unit is: O1 ≤ 0.25 D, and the diameter O2 of the overflow port of the second-stage separation unit is: O2 ≤ 0.25 D; One end of the overflow port of the first-stage separation unit extends into the separation chamber of the first-stage separation unit, and the length l1 extending into the separation chamber of the first-stage separation unit is: 0.4 D ≤ l1 ≤ 0.8 D. One end of the overflow port of the second-stage separation unit extends into the separation chamber of the second-stage separation unit, and the length l2 extending into the separation chamber of the second-stage separation unit is: 0.4 D ≤ l2 ≤ 0.8 D. The diameter U1 of the underflow outlet of the first-stage separation unit is: U1 ≤ 0.15 D, and the diameter U2 of the underflow outlet of the second-stage separation unit is: U2 ≤ 0.15 D; The diameter F of the discharge port is: F ≥ O2; The distance L1 between the separator and the large end of the first tapered segment is: 3.0 D ≤ L1 ≤ 6.0 D, and the distance L2 between the separator and the large end of the second tapered segment is: 3.0 D ≤ L2 ≤ 6.0 D; The diameter D1 of the large end of the first conical segment is: D1 ≤ 0.80 D, and the diameter D2 of the large end of the second conical segment is: D2 ≤ 0.80 D; The height h1 of the first conical segment is: 2.0 D ≤ h1 ≤ 3.5 D, and the height h2 of the second conical segment is: 2.0 D ≤ h2 ≤ 3.5 D; The height G1 of the first cylindrical segment is: 0.5 D1 ≤ G1 ≤ 1.5 D1, and the height G2 of the second cylindrical segment is: 0.5 D2 ≤ G2 ≤ ​​1.5 D2; The cone angle θ1 of the first conical segment is: 16° ​​≤ θ1 ≤ 24°, and the cone angle θ2 of the second conical segment is: 16° ​​≤ θ2 ≤ 24°. The spiral blade is wound 2-6 times. The helix angle β of the helical blade is: 0° ≤ β ≤ 30°; The outer diameter N of the cylindrical part is: N ≤ 0.80 D.

10. The waste bypass treatment apparatus according to any one of claims 3 to 9, characterized in that, The ultrasonic reactor comprises a single ultrasonic unit, or the ultrasonic reactor comprises multiple ultrasonic units connected in series; and / or The ultrasonic unit is a tubular ultrasonic unit; and / or The separation device is provided in multiple units, and the multiple separation devices are connected in parallel; and / or The ultrasonic reactor is provided in multiple units, and the multiple ultrasonic reactors are connected in parallel.

11. A waste treatment system, characterized in that, The device includes an anaerobic digestion apparatus and a waste bypass treatment apparatus according to any one of claims 3 to 10, wherein the inlet of the separation device of the waste bypass treatment apparatus is connected to the outlet of the anaerobic digestion apparatus, and the outlet of the ultrasonic reactor of the waste bypass treatment apparatus is connected to the return port of the anaerobic digestion apparatus.

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