Waste bypass treatment method and device and waste treatment system

Abstract

The invention discloses a waste bypass treatment method and device and a waste treatment system. The waste bypass treatment method comprises the steps that organic matter and inorganic matter in waste treated by an anaerobic digestion device are separated through a separation device, and the separation device comprises a separation unit or a plurality of separation units which are sequentially connected in series; waste discharged from an overflow port of the separation device is discharged into an ultrasonic reactor for ultrasonic treatment; and conveying the waste subjected to ultrasonic treatment back to the anaerobic digestion device. According to the method, efficient separation of organic matter and inorganic matter in the waste can be rapidly achieved through the separation device, the waste with the high organic matter content is subjected to ultrasonic treatment through the ultrasonic reactor, waste structure cracking and even wall breaking are achieved, the concentration and biochemical degradability of the soluble organic matter are synchronously improved, the particle size of the waste is reduced, and waste recycling is achieved. The organic matter conversion rate of the waste is further increased.

Description

Technical Field

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

[0002] As an inevitable by-product in the biochemical treatment of sewage, the treatment and disposal of sludge has always been a shortcoming of sewage treatment in my country. Anaerobic digestion can stabilize the easily degradable organic matter in sludge and recover biomass energy. It is the mainstream technology for sludge stabilization, reduction and resource treatment at home and abroad. However, during the digestion process, only 35% to 50% of volatile solids (VS) are converted or degraded, and the remaining organic matter in the sludge may not be effectively utilized or cause pollution to the environment because of landfill disposal. The organic matter in the sludge is mainly long-chain organic matter, such as palmitic acid, stearic acid and oleic acid, lignin, hemicellulose and cellulose, which are difficult to degrade. In addition, the residual sludge pretreatment technology (thermal hydrolysis, ultrasound, etc.) is non-selective when acting on sludge, and it has an effect on both difficult-to-biodegrade organic matter and 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 methanogenesis performance of sludge and realize the safe treatment, disposal and resource utilization of sludge. Summary of the invention

[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 efficiency of anaerobic digestion, thereby providing a waste bypass treatment method and device that promotes anaerobic energy conversion of waste, so as to improve the stabilization and methane production performance of the waste, and realize the safe treatment, disposal and resource utilization of the waste.

[0004] The present application embodiment provides a waste bypass treatment method, comprising:

[0005] A separation device is used to separate organic matter and inorganic matter in waste treated by an anaerobic digestion device, wherein the separation device includes one separation unit or multiple separation units, and an overflow port of one of the multiple separation units is connected to a feed port of an adjacent separation unit so that the multiple separation units are sequentially connected in series, the waste is configured to be able to perform a spiral motion in a separation chamber of the separation unit to achieve separation of organic matter and inorganic matter, and the content of organic matter in the waste discharged from the overflow port of the separation unit is higher than the content of organic matter in the waste discharged from the underflow port of the separation unit;

[0006] Discharging the waste discharged from the overflow port of the separation device into an ultrasonic reactor for ultrasonic treatment;

[0007] The ultrasonically treated waste is transported back to the anaerobic digestion unit.

[0008] 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 port of the separation device for ultrasonic treatment, and the waste after ultrasonic treatment is recovered to the anaerobic digestion device for re-treatment; wherein, after the waste is treated by the separation device, the waste discharged from the overflow port of the separation device has a high content of volatile organic solids, which achieves the enrichment of organic matter and can effectively improve the treatment efficiency of the ultrasonic reactor; when the waste is ultrasonically treated, the ultrasonic cavitation effect will mainly focus on the treatment of difficult-to-degrade 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 organic matter in the waste; part of the waste is discharged through the underflow port 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, making it easy for its subsequent disposal and resource utilization.

[0009] The present application also provides a waste bypass treatment device, comprising:

[0010] A separation device, comprising one or more separation units, wherein the separation unit has a separation chamber, and a feed port, an underflow port and an overflow port connected to the separation chamber, wherein the overflow port of one of the plurality of separation units is connected to the feed port of an adjacent separation unit so that the plurality of separation units are sequentially connected in series, and the separation unit is configured to separate organic matter from inorganic matter in the waste by spiral motion of the waste in its separation chamber so that the content of organic matter in the waste discharged from the overflow port of the separation unit is higher than the content of organic matter in the waste discharged from the underflow port of the separation unit; and

[0011] an ultrasonic reactor, the inlet of which is in communication with the overflow port of the separation device, and the ultrasonic reactor is configured to perform ultrasonic treatment on the waste;

[0012] The feed inlet of the separation device is arranged to communicate with the discharge outlet of the anaerobic digestion device, and the outlet of the ultrasonic reactor is arranged to communicate with the return port of the anaerobic digestion device.

[0013] The present application also provides a waste treatment system, comprising an anaerobic digestion device and the above-mentioned waste bypass treatment device, wherein the feed inlet of the separation device of the waste bypass treatment device is connected to the discharge outlet of the anaerobic digestion device, and the outlet of the ultrasonic reactor of the waste bypass treatment device is connected to the return port of the anaerobic digestion device.

[0014] Compared with the prior art, the embodiments of the present application have the following technical effects:

[0015] 1. The embodiment of the present application provides a waste bypass treatment method and device, which utilizes a separation device and an ultrasonic reactor for combined treatment, thereby realizing rapid separation of organic matter and inorganic matter in waste and graded and graded treatment of waste, improving the operating efficiency of ultrasonic treatment, and further increasing the organic matter conversion rate of waste;

[0016] 2. Compared with conventional anaerobic digestion of waste, the waste bypass treatment method of the embodiment of the present application effectively improves the methane production potential of waste, promotes the stabilization, reduction and harmlessness of waste, and is beneficial to the subsequent disposal and resource utilization of waste;

[0017] 3. The waste bypass treatment methods in the embodiments of the present application are all physical methods. The waste bypass treatment devices have the advantages of high treatment efficiency, small footprint, low cost, and no secondary pollution, and are highly compatible with existing anaerobic digestion devices.

[0018] Other features and advantages of the present application will be set forth in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0020] Figure 1 A schematic diagram of a waste bypass treatment method according to an embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the structure of a waste treatment system according to an embodiment of the present application;

[0022] Figure 3 A schematic structural diagram of a separation device of a waste treatment system according to an embodiment of the present application;

[0023] Figure 4 for Figure 3 The schematic diagram of the working principle of the separation device shown;

[0024] Figure 5 It is a comparative schematic diagram of SCOD values ​​in wastes that have not been treated, that have been treated with ultrasound, and that have been treated by the waste treatment system of an embodiment of the present application;

[0025] Figure 6 It is a schematic diagram comparing the average particle size of wastes that have not been treated, that have been treated with ultrasound, and that have been treated by the waste treatment system of an embodiment of the present application;

[0026] Figure 7It is a comparative schematic diagram of methane production of wastes that have not been treated, that have been treated with ultrasound, and that have been treated by the waste treatment system of the embodiment of the present application;

[0027] Figure 8 It is a comparative schematic diagram of methane production of waste after anaerobic digestion treatment, after anaerobic digestion and ultrasonic bypass treatment, and after anaerobic digestion and treatment by the waste treatment system of the embodiment of the present application.

[0028] Reference numerals:

[0029] 100-first stage separation unit, 200-second stage separation unit, 300-separation device;

[0030] 1-outer cylinder, 11-first end wall, 12-first separation chamber, 13-second separation chamber, 14-first feed port, 15-first underflow port, 16-first overflow port, 17-second feed port, 18-second underflow port, 19-second overflow port, 110-discharge port, 111-second end wall;

[0031] 2-first inner cone, 21-first conical section, 22-first cylindrical section;

[0032] 3-second inner cone, 31-second conical section, 32-second cylindrical section;

[0033] 4-helical body, 41-columnar portion, 411-first communicating cavity, 42-spiral blade, 43-spiral flow channel;

[0034] 5-ultrasonic reactor, 51-first ultrasonic unit, 52-second ultrasonic unit;

[0035] 6-Anaerobic digestion unit. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application will be described in detail below. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0037] The present application is further described in detail below in conjunction with specific examples, but the examples should not be construed as limiting the present application.

[0038] like Figure 1 As shown, the embodiment of the present application provides a waste bypass treatment method, comprising the following steps:

[0039] Step S102: Separate the organic matter and inorganic matter in the waste treated by the anaerobic digestion device using a separation device. The separation device includes one separation unit or multiple separation units, and the overflow port of one of the multiple separation units is connected to the feed port of the adjacent separation unit so that the multiple separation units are connected in series in sequence. The waste is configured to be able to perform spiral motion in the separation chamber of the separation unit to achieve separation of organic matter and inorganic matter, and the content of organic matter in the waste discharged from the overflow port of the separation unit is higher than the content of organic matter in the waste discharged from the underflow port of the separation unit.

[0040] Step S104: discharge the waste discharged from the overflow port of the separation device into the ultrasonic reactor for ultrasonic treatment. Wherein, when the separation device includes only one separation unit, the feed port and overflow port of the separation unit are the feed port and overflow port of the separation device respectively; when the separation device includes multiple separation units connected in series, the feed port of the first separation unit is the feed port of the separation device, and the overflow port of the last separation unit is the overflow port of the separation device.

[0041] Step S106: transporting the waste after ultrasonic treatment back to the anaerobic digestion device.

[0042] The waste bypass treatment method of the embodiment of the present application can be Figure 2 The waste bypass treatment device shown in FIG. 3 is used to achieve the waste separation operation. The ultrasonic reactor 5 can be used to perform ultrasonic treatment on the waste. The waste can be sludge from the primary sedimentation tank of a municipal sewage treatment plant, residual sludge, riverbed sludge, and the like. Before the waste is bypassed, anaerobic digestion treatment is first performed in the anaerobic digestion device 6, and then the waste is separated by the separation device 300.

[0043] The separation device 300 may include one or more (such as Figure 3 and Figure 4In the process of realizing waste separation, first, the waste treated by the anaerobic digestion device 6 can be input into the first-stage separation unit 100 of the two separation units, and the waste is spirally moved in the separation chamber (i.e., the first separation chamber 12) of the first-stage separation unit 100 to separate the organic matter and inorganic matter (such as inorganic sand particles, etc.) in the waste, so that compared with the waste entering the first-stage separation unit 100 from the feed port (i.e., the first feed port 14) of the first-stage separation unit 100, the concentration of inorganic matter in the waste discharged from the underflow port (i.e., the first underflow port 15) of the first-stage separation unit 100 is increased, and the concentration of organic matter is decreased, and the waste discharged from the first-stage separation unit 100 is discharged from the underflow port 15 of the first-stage separation unit 100. The concentration of inorganic matter in the waste discharged from the overflow port (i.e., the first overflow port 16) is reduced, and the concentration of organic matter is increased; 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, and the waste can perform 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 matter 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, and the concentration of organic matter is further increased, so as to further remove the inorganic matter in the waste.

[0044] After the waste is separated and treated 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. Ultrasonic treatment uses high-frequency sound wave energy input and its cavitation effect to break the structure of the waste and even break the wall, while simultaneously increasing the concentration of soluble organic matter and its biodegradability, 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 first underflow port 15 and the second underflow port 18 through the sludge discharge pipeline.

[0045] After the waste is ultrasonically treated by the ultrasonic reactor 5, it can be transported back to the anaerobic digestion device 6. Since the structure of the waste after ultrasonic treatment is broken or even broken, the concentration and biodegradability of the soluble organic matter are increased, and the particle size of the waste is reduced, it is convenient for the waste to be further anaerobic digested in the anaerobic digestion device 6, and the anaerobic digestion process of the waste is accelerated, so as to further promote the conversion rate of organic matter in the waste and improve the anaerobic digestion effect of the waste.

[0046] In the waste bypass treatment method provided in the embodiment of the present application, the waste treated by the anaerobic digestion device 6 enters the separation device 300 through the first feed port 14 for organic-inorganic separation treatment, and part of the waste enters the ultrasonic reactor 5 through the second overflow port 19 for ultrasonic treatment, and the waste after ultrasonic treatment is recycled to the anaerobic digestion device 6 for reprocessing. Among them, after the waste is treated by the separation device 300, the volatile organic solid content in the waste discharged from the second overflow port 19 is high, which realizes the enrichment of organic matter and can effectively improve the treatment efficiency of the ultrasonic reactor 5; when the waste is ultrasonically treated, the ultrasonic cavitation effect will mainly focus on the treatment of difficult-to-degrade substances, which can reduce the operating energy consumption of ultrasound, improve the utilization rate of ultrasonic energy, and further promote the conversion rate of organic matter in the waste; part of the waste is discharged through the first underflow port 15 and the second underflow port 18, wherein the inorganic particulate matter content in the waste discharged from the second underflow port 18 is high, further reducing the content of volatile organic solids in the waste, and facilitating its subsequent disposal and resource utilization.

[0047] The waste bypass treatment method provided in the embodiment of the present application realizes efficient treatment of waste by quality, and the pretreatment methods are all physical methods, which have the advantages of high efficiency and no secondary pollution.

[0048] In some exemplary embodiments, the ultrasonic reactor 5 may include one or more ultrasonic units, which may be tube-rod type ultrasonic units, and a plurality of tube-rod type ultrasonic units may be connected in series. Of course, the ultrasonic unit may also be in other forms besides the tube-rod type. Figure 2 As shown, the ultrasonic reactor 5 may 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.

[0049] Based on this, when performing ultrasonic treatment, the working parameters of the tube-rod ultrasonic unit can be: power: 0-1000W; ultrasonic frequency: 20-40kHz; power density: 0.4-1.2W / mL; waste residence time: 5-60s.

[0050] The tube-rod ultrasonic unit adopts the above working parameters to carry out ultrasonic treatment on waste with high organic matter content, which can effectively break the structure of the waste and even break the wall, so as to increase the concentration and biodegradability of soluble organic matter, reduce the particle size of the waste, and further promote the conversion rate of organic matter in the waste.

[0051] Of course, the working parameters of the tube-rod type ultrasonic unit are not limited to the above ranges and can be adjusted according to actual needs.

[0052] In some exemplary embodiments, the pressure of the waste input into the separation device 300 (ie, the pressure of the waste input into the first feed port 14 of the first-stage separation unit 100 ) is 0.2 MPa to 0.5 MPa, such as 0.3 MPa.

[0053] The pressure of the waste input into the first feed port 14 of the first-stage separation unit 100 is between 0.2 MPa and 0.5 MPa, so that the two-stage separation unit can be used to achieve efficient and effective separation and treatment of the waste, so as to increase the organic matter content of the overflow waste after treatment by the two-stage separation unit.

[0054] In some exemplary embodiments, according to actual needs, the anaerobic digestion treatment is a mesophilic anaerobic digestion treatment, and the operating parameters are: temperature of 37±0.5°C, and residence time of 12-20 days.

[0055] Of course, the temperature and residence time of anaerobic digestion treatment are not limited to the above ranges, and can be adjusted according to actual needs.

[0056] like Figure 2-Figure 4 As shown, the embodiment of the present application also provides a waste bypass treatment device, including: a separation device 300 and an ultrasonic reactor 5.

[0057] The separation device 300 includes one separation unit or multiple separation units, each of which has a separation chamber, and a feed port, an underflow port and an overflow port connected to the separation chamber. The overflow port of one of the multiple separation units is connected to the feed port of an adjacent separation unit so that the multiple separation units are connected in series in sequence. The separation unit is configured to separate organic matter from inorganic matter in the waste by spiral motion of the waste in its separation chamber, so that the content of organic matter in the waste discharged from the overflow port of the separation unit is higher than the content of organic matter in the waste discharged from the underflow port of the separation unit.

[0058] The inlet of the ultrasonic reactor 5 is connected to the overflow ports of all the separation devices 300, and the ultrasonic reactor 5 is configured to perform ultrasonic treatment on the waste. The feed port of the separation device 300 is configured to be connected to the discharge port of the anaerobic digestion device 6, and the outlet of the ultrasonic reactor 5 is configured to be connected to the return port of the anaerobic digestion device 6.

[0059] When the waste bypass treatment device treats the waste after being treated by the anaerobic digestion device 6, the waste is first separated into organic matter and inorganic matter by a separation unit, or separated into organic matter and inorganic matter by a plurality of separation units connected in series in sequence; 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 ultrasonic reactor is used to perform ultrasonic treatment on the waste, and the high-frequency sound wave energy input and its cavitation effect are used to break the structure of the waste and even break the wall, and simultaneously increase the concentration of soluble organic matter and its biodegradability, reduce the particle size of the waste, and then facilitate the subsequent recycling of the waste 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.

[0060] In some exemplary embodiments, the separation device includes a plurality of separation units, and further includes: an outer cylinder 1 and a plurality of inner cones.

[0061] At least one partition is provided in the outer cylinder 1 to divide the space in the outer cylinder into a plurality of separation chambers. The outer cylinder 1 may be a cylindrical cylinder. Of course, the outer cylinder 1 may also be a non-cylindrical cylinder.

[0062] Multiple inner cones are arranged in a one-to-one correspondence in multiple separation chambers, and the small end of the inner cone faces the side where the feed port and overflow port connected to the corresponding separation chamber are located, and the large end of the inner cone is close to the bottom flow port connected to the corresponding separation chamber.

[0063] When the separation device 300 is working, the waste enters the separation chamber of the separation unit and makes a spiral motion. The waste rotates in the separation chamber to generate a spiral flow. Under the action of the inner cone in the separation chamber, the spiral flow is divided into two parts. One part of the spiral flow (outer spiral flow) moves toward the bottom flow port of the separation chamber and is discharged from the bottom flow port, and the other part of the spiral flow (inner spiral flow) moves toward the overflow port of the separation chamber and is discharged from the overflow port. In the separation chamber, the basic principle of separation of inorganic and organic matter is centrifugal sedimentation. Due to the large centrifugal force, the inorganic matter moves toward the inner wall of the outer cylinder 1 and is discharged from the bottom flow port with the outer spiral flow; the organic matter is discharged from the overflow port with the inner spiral flow before it has time to settle due to the small centrifugal force, thereby separating the organic and inorganic matter in the waste, and the waste discharged from the overflow port has a high organic content and a low inorganic content, while the waste discharged from the bottom flow port has a low organic content and a high inorganic content.

[0064] In some embodiments, such as Figure 3 and Figure 4As shown, the partition includes a spiral body 4, which includes a cylindrical portion 41 and a spiral blade 42. The spiral blade 42 is arranged between the outer wall of the cylindrical portion 41 and the inner wall of the outer cylinder 1 to form a spiral flow channel 43. The inlet of the spiral flow channel 43 is connected to the overflow port of the separation chamber on one side of the partition, and the outlet of the spiral flow channel 43 is connected to the feed port of the separation chamber on the other side of the partition.

[0065] The partition inside the outer cylinder 1 includes a spiral body 4, and an annular cavity is provided between the cylindrical portion 41 of the spiral body 4 and the inner wall of the outer cylinder 1. The annular cavity is divided into a spiral flow channel 43 by spiral blades 42, and the inlet of the spiral flow channel 43 is connected to the overflow port of the separation chamber on one side of the partition, and the outlet of the spiral flow channel 43 is connected to 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 that the waste is spirally separated in the other separation chamber.

[0066] The overflow ports and feed ports of adjacent separation chambers on both sides of the separator are connected by the separator, that is, the series connection of two adjacent separation units is realized, and it is convenient to realize the sequential series connection of multiple separation units through at least one separator. And the setting of the spiral flow channel 43 facilitates the spiral movement of the waste discharged from the spiral flow channel 43 into the separation chamber of the next-level separation unit, so as to realize the separation of organic matter and inorganic matter in the waste in the separation chamber.

[0067] In some exemplary embodiments, the separation device 300 includes two separation units, two inner cones, and a partition.

[0068] The two separation units are a first-stage separation unit 100 and a second-stage separation unit 200 .

[0069] 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 connected to the first separation chamber 12, a first bottom flow port (the bottom flow port of the first-stage separation unit) 15 and a first overflow port (the overflow chamber of the first-stage separation unit) 16, 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 connected to the second separation chamber 13, a second bottom flow port (the bottom flow port of the second-stage separation unit) 18 and a second overflow port (the overflow chamber of the second-stage separation unit) 19, wherein the first overflow port 16 is connected to the inlet of the spiral flow channel 43, the second feed port 17 is connected to the outlet of the spiral flow channel 43, and the second overflow port 19 is connected to the inlet of the ultrasonic reactor 5.

[0070] 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, with the small end of the first inner cone 2 facing the side where the first feed port 14 and the first overflow port 16 are located, and the large end of the first inner cone 2 is close to the first underflow port 15.

[0071] 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 second feed port 17 and the second overflow port 19 , and the large end of the second inner cone 3 close to the second underflow port 18 .

[0072] like Figure 3 and Figure 4 As shown, when the separation device 300 is working, the waste after anaerobic digestion can enter the first separation chamber 12 from the first feed port 14 and perform spiral motion. The waste rotates in the first separation chamber 12 to generate 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 (shown as M1 in FIG. 1 ) moves toward the first bottom flow port 15 and is discharged from the first bottom flow port 15. The other part of the spiral flow (shown as M1 in FIG. 1 ) moves toward the first bottom flow port 15 and is discharged from the first bottom flow port 15. Figure 4 The inner spiral flow M2 in the figure is directed to the first overflow port 16 and discharged from the first overflow port 16. In the first separation chamber 12, there are both the outer spiral flow M1 and the inner spiral flow M2 to separate the organic matter and the inorganic matter in the waste.

[0073] After the first separation of the first separation unit 100, the waste discharged from the first overflow port 16 flows through the spiral flow channel 43, and then enters the second separation chamber 13 from the second feed port 17 to perform spiral motion. The waste rotates in the second separation chamber 13 to generate a spiral flow. Under the action of the second inner cone 3, the spiral flow is divided into two parts. One part of the spiral flow (such as Figure 4 The outer spiral flow (shown as M3 in FIG. 1 ) moves toward the second bottom flow port 18 and is discharged from the second bottom flow port 18, and the other part of the spiral flow (shown as M3 in FIG. 1 ) moves toward the second bottom flow port 18 and is discharged from the second bottom flow port 18. Figure 4 The inner spiral flow M4 shown in FIG. 1 moves toward the second overflow port 19 and is discharged from the second overflow port 19. In the second separation chamber 13, there are both the outer spiral flow M3 and the inner spiral flow M4 to achieve the re-separation of organic and inorganic matter in the waste.

[0074] After two-stage separation in the first-stage separation unit 100 and the second-stage separation unit 200, the waste discharged from the first bottom flow outlet 15 of the first-stage separation unit 100 and the second bottom flow outlet 18 of the second-stage separation unit 200 can be discharged through the sludge discharge pipeline, and the waste discharged from the second overflow outlet 19 can be discharged into the ultrasonic reactor 5 for ultrasonic treatment.

[0075] In some exemplary embodiments, Figure 3 and Figure 4 As shown, a first communication cavity 411 is provided in the cylindrical portion 41 of the partition, a discharge port 110 is provided in the outer cylinder 1, a second overflow port 19 is provided in the cylindrical portion 41, and the second overflow port 19 is connected with the discharge port 110 through the first communication cavity 411.

[0076] A first connecting cavity 411 is provided in the cylindrical portion 41 of the spiral body 4, and the second overflow port 19 can be connected with the discharge port 110 on the outer cylinder 1 through the first connecting cavity 411, so that the waste overflowing from the second overflow port 19 can be discharged from the discharge port 110 after passing through the first connecting cavity 411.

[0077] In some exemplary embodiments, 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 faces 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 faces 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 and the second end wall 111 of the outer cylinder 1 are arranged opposite to each other. Among them, the first conical section 21 and the second conical section 31 can be conical, 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 the upper end wall and the lower end wall, respectively.

[0078] The first feed port 14 , the first bottom flow port 15 and the second bottom flow 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 bottom flow port 15 is close to the second end wall 111 of the outer cylinder 1 , and the second bottom flow port 18 is close to the first end wall 11 of the outer cylinder 1 .

[0079] 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 faces upward, the small end of the second inner cone 3 faces downward, and the small ends of the first inner cone 2 and the second inner cone 3 are both facing the partition, so that the first inner cone 2 and the second inner cone 3 can be basically arranged 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 are arranged oppositely; the first underflow port 15 can be located at the lower part of the side wall of the outer cylinder 1 and close to the lower end wall (second end wall 111) of the outer cylinder 1; the second underflow port 18 can be located at the upper part of the side wall of the outer cylinder 1 and close to the upper end wall (first end wall 11) of the outer cylinder 1.

[0080] The separation device 300 has the advantages of simple and compact structure, small footprint, high separation efficiency, low operation and maintenance costs, and no need to add reagents, thus realizing low-consumption and high-efficiency separation technology.

[0081] In some of these embodiments, Figure 3 As shown, the size of the separation device 300 satisfies at least one of the following:

[0082] The inner diameter D of the outer cylinder 1 is: 50mm≤D≤250mm;

[0083] The diameter d of the first feed port 14 is: d≤0.25D;

[0084] The diameter O1 of the first overflow port 16 is: O1≤0.25D, and the diameter O2 of the second overflow port 19 is: O2≤0.25D;

[0085] One end of the first overflow port 16 extends into the first separation chamber 12, and the length l1 extending into the first separation chamber 12 is: 0.4D≤l1≤0.8D, and one end of the second overflow port 19 extends into the second separation chamber 13, and the length l2 extending into the second separation chamber 13 is: 0.4D≤l2≤0.8D;

[0086] The diameter U1 of the first underflow port 15 is: U1≤0.15D, and the diameter U2 of the second underflow port 18 is: U2≤0.15D;

[0087] The diameter F of the discharge port 110 is: F ≥ O2;

[0088] The distance L1 between the partition and the large end of the first tapered section 21 is: 3.0D≤L1≤6.0D, and the distance L2 between the partition and the large end of the second tapered section 31 is: 3.0D≤L2≤6.0D;

[0089] The diameter D1 of the large end of the first tapered section 21 is: D1≤0.80D, and the diameter D2 of the large end of the second tapered section 31 is: D2≤0.80D;

[0090] The height h1 of the first tapered section 21 is: 2.0D≤h1≤3.5D, and the height h2 of the second tapered section 31 is: 2.0D≤h2≤3.5D;

[0091] 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;

[0092] The cone angle θ1 of the first cone section 21 is: 16°≤θ1≤24°, and the cone angle θ2 of the second cone section 31 is: 16°≤θ2≤24°;

[0093] The number of turns of the spiral blade 42 is: 2-6;

[0094] The helical angle β of the helical blade 42 is: 0°≤β≤30°;

[0095] The outer diameter N of the columnar portion 41 is: N≦0.80D.

[0096] Of course, the dimensions of the separation device 300 are not limited to the above ranges and can be adjusted according to actual needs.

[0097] It should be understood that the above-mentioned "diameter" may refer to the diameter when the components, structures, etc. are cylindrical or circular, or may refer to the equivalent diameter when the components, structures, etc. are non-cylindrical or non-circular.

[0098] In some exemplary embodiments, Figure 3 and Figure 4 As shown, the first feed port 14 is arranged tangentially to the first separation chamber 12 so that the waste forms a spiral motion in the first separation chamber 12 to achieve separation of the waste.

[0099] Of course, the first feed port 14 and the first separation chamber 12 may also be arranged to be non-tangential, and the spiral movement of the waste in the first separation chamber 12 is achieved by arranging a spiral flow channel in the first separation chamber 12 (such as: similar to the spiral flow channel 43 in the second separation chamber 13).

[0100] In some exemplary embodiments, Figure 3 and Figure 4 As shown, the first underflow port 15 can be arranged tangentially to the first separation chamber 12, and the second underflow port 18 can be arranged tangentially to the second separation chamber 13, so that waste can be discharged through the first underflow port 15 and the second underflow port 18 respectively.

[0101] In some exemplary embodiments, the separation device 300 further includes a delivery pump (not shown), the outlet of the delivery pump is connected to the first feed port 14, and the delivery pump is configured to make the pressure of the waste input into the first feed port 14 be 0.2 MPa to 0.5 MPa. The delivery pump device that applies working pressure to the waste can be a mechanical device for delivering fluids, such as a submersible pump and a rotor pump.

[0102] In some exemplary embodiments, each outlet of the separation device 300 (e.g. Figure 3 and Figure 4 The first underflow port 15, the second underflow port 18 and the discharge port 110 are all equipped with electric valves to adjust the waste discharge flow rate.

[0103] In some exemplary embodiments, the separation device 300 is made of cast iron or stainless steel. Of course, the separation device 300 can also be made of other materials according to actual conditions.

[0104] In some exemplary embodiments, the axis of the outer cylinder 1 may be perpendicular to the horizontal plane to achieve upright installation of the separation device 300, such as Figure 2-Figure 4 As shown; or, the axis of the outer cylinder 1 is tilted relative to the horizontal plane to achieve oblique installation of the separation device 300; or, the axis of the outer cylinder 1 is parallel to the horizontal plane to achieve flat installation of the separation device 300.

[0105] In some exemplary embodiments, the underflow outlet of each separation unit (eg, the first underflow outlet 15 and the second underflow outlet 18) may be connected to a biogas sludge discharge pipeline to discharge waste with a high inorganic content (eg, a high sand content).

[0106] In some exemplary 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. Figure 2 As shown, the ultrasonic reactor 5 may 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.

[0107] The number of the tube-rod ultrasonic units in the ultrasonic reactor 5 can be determined according to the amount of waste to be processed, and a plurality of tube-rod ultrasonic units can be arranged in series.

[0108] In some exemplary embodiments, a plurality of ultrasonic reactors 5 are provided, and the plurality of ultrasonic reactors 5 are connected in parallel.

[0109] In some exemplary embodiments, a plurality of separation devices 300 are provided, and the plurality of separation devices 300 are connected in parallel.

[0110] Depending on the amount of waste to be processed, for example, when the amount of waste to be processed is relatively large, multiple ultrasonic reactors 5 and / or separation devices 300 may be provided, and multiple ultrasonic reactors 5 and multiple separation devices 300 may be operated in parallel.

[0111] An embodiment of the present application also provides a waste treatment system, comprising an anaerobic digestion device and a waste bypass treatment device of any of the above embodiments, wherein a feed port (e.g., a first feed port 14) of a separation device 300 of the waste bypass treatment device is connected to a discharge port of the anaerobic digestion device 6, and an outlet of an ultrasonic reactor 5 of the waste bypass treatment device is connected to a return port of the anaerobic digestion device 6.

[0112] The waste treatment system of the embodiment of the present application can utilize the separation device 300 of the waste bypass treatment device to separate the organic matter and inorganic matter of the waste, and utilize the ultrasonic reactor 5 of the waste bypass treatment device to decompose the structure of the waste and even break the wall, so that the concentration and biodegradability of the soluble organic matter are increased, and the particle size of the waste is reduced, which is convenient for the waste to be further anaerobic digested in the anaerobic digestion device 6; the waste after ultrasonic treatment can be returned to the anaerobic digestion device 6 for further anaerobic digestion, which accelerates the anaerobic digestion process of the waste and reduces the reaction time of the anaerobic digestion of the waste, so as to further promote the conversion rate of organic matter in the waste and improve the anaerobic digestion effect of the waste.

[0113] In some exemplary embodiments, the anaerobic digestion device 6 may be an anaerobic digester or an anaerobic digestion tank. The anaerobic digestion device may be in the shape of a fully mixed anaerobic reactor such as a slender tall column cone, a thick short column cone or an oval shape.

[0114] The effects of the waste bypass treatment method and device of the present application are explained below in conjunction with two specific embodiments.

[0115] Embodiment 1:

[0116] like Figure 2-Figure 4 As shown, this embodiment provides a waste bypass treatment device, which can promote the anaerobic energy conversion of waste and realize the graded separation and conditioning treatment of waste. The waste bypass treatment device includes a separation device 300 and an ultrasonic reactor 5 connected in sequence. The separation device 300 of the waste bypass treatment device can be located on the sludge discharge pipeline of the anaerobic digestion device 6, and the waste entering the separation device 300 can be the sludge after anaerobic digestion treatment by the anaerobic digestion device 6.

[0117] The waste treated by the anaerobic digestion device 6 enters the separation device 300 through the first feed port 14 to separate the organic matter and inorganic matter of the sludge. Part of the waste enters the ultrasonic reactor 5 through the second overflow port 19 for 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.

[0118] like Figure 3 and Figure 4As shown, in this 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 chamber 12 is 55 mm, and the second overflow port 19 extending into the second separation chamber 12 is 65 mm. The length l2 of the 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 cone angle θ1 of the first conical section 21 is 16°, and the cone 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 separator 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.

[0119] In this embodiment, the pressure of the waste input into the first feed port 14 of the first-stage separation unit 100 (ie, the working pressure or driving pressure of the separation device 300, the device applying the pressure is a delivery pump) is 0.35 MPa.

[0120] In this embodiment, the overflow port (second overflow port 19) of the separation device 200 is connected to the inlet of the ultrasonic reactor 5, and the ultrasonic reactor 5 includes a plurality of tube-rod ultrasonic units, wherein the number of the tube-rod ultrasonic units may be two, the power of a single tube-rod ultrasonic unit may be 1000W, the ultrasonic frequency may be 26kHz, the power density may be 0.8W / mL, and the sludge residence time may be 50s.

[0121] The waste bypass treatment device of this embodiment is used to treat waste, and the experimental results are as follows:

[0122] Figure 5-Figure 7 The effects of ultrasonic treatment and separation + ultrasonic combined treatment on the soluble chemical oxygen demand (SCOD), particle size and methanogenic potential of anaerobic digestion residue are shown.

[0123] like Figure 5As shown, the SCOD of the untreated sludge is 2167 mg / L, the SCOD of the sludge after ultrasonic treatment is 2973 mg / L, and the SCOD of the sludge after separation + ultrasonic combined treatment by the waste bypass treatment device of this embodiment is 2923 mg / L, that is, the SCOD of the sludge after ultrasonic and separation + ultrasonic combined treatment increased from 2167 mg / L to 2973 and 2923 mg / L, respectively.

[0124] like Figure 6 As shown, the particle size (average particle size) of the untreated sludge is 15.08 μm, the particle size of the sludge after ultrasonic treatment is 7.36 μm, and the particle size of the sludge after treatment with the waste bypass treatment device (separation + ultrasound) of this embodiment is 5.09 μm, that is, the particle size of the sludge after ultrasound and separation + ultrasound combined treatment is reduced from 15.08 μm to 7.36 and 5.09 μm, respectively.

[0125] like Figure 7 As shown, the methanogenesis potential of the untreated sludge is 25.54 N mL / g-VS, the methanogenesis potential of the sludge after ultrasonic treatment is 39.01 N mL / g-VS, and the methanogenesis potential of the sludge after treatment with the waste bypass treatment device (separation + ultrasound) of this embodiment is 43.77 N mL / g-VS, that is, the methanogenesis potential of the sludge increases from 25.54 N mL / g-VS to 39.01 and 43.77 N mL / g-VS, respectively.

[0126] The results show that the waste bypass treatment device of this embodiment can achieve changes in the physicochemical properties of the biogas sludge, crack the biogas sludge and release the internal organic matter, significantly increase the SCOD of the biogas sludge, reduce the particle size of the biogas sludge, and significantly increase the methane production potential of the biogas sludge.

[0127] Embodiment 2:

[0128] This embodiment provides a waste bypass treatment method, and the waste bypass treatment device in the first embodiment can be used to re-process the waste.

[0129] The first feed port 14 of the separation device 300 of the waste bypass treatment device is connected to the discharge port of the anaerobic digestion device 6, and the outlet of the ultrasonic reactor 5 of the waste bypass treatment device is connected to the return port of the anaerobic digestion device 6, so as to return the waste after ultrasonic treatment to the anaerobic digestion device 6 for anaerobic digestion treatment.

[0130] In this embodiment, the sludge concentration of the feed sludge of the anaerobic reaction device 6 is 43.51 g / L.

[0131] like Figure 8As shown, the methane production of the sludge after only being treated by the anaerobic digestion device 6 is 141.34N mL / g-VS; the methane production of the sludge after being treated by the anaerobic digestion device 6 and the ultrasonic bypass of the ultrasonic reactor 5 is 160.79N mL / g-VS; the methane production of the sludge after being treated by the anaerobic digestion device 6 and the separation device 300 + the ultrasonic bypass of the ultrasonic reactor 5 is 169.14N mL / g-VS. The results show that the waste bypass treatment method of this embodiment can increase the organic matter conversion rate of the sludge, improve the gas production of the anaerobic digestion of the sludge, promote the stabilization, reduction and harmlessness of the sludge, and is conducive to the subsequent disposal and resource utilization of the waste sludge.

[0132] In the description of the present application, it should be understood that the terms "length", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0133] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0134] In the description of the present application, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0135] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0136] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is 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 being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0137] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0138] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within 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 matter and inorganic matter in waste treated by an anaerobic digestion device, wherein the separation device includes one separation unit or multiple separation units, and an overflow port of one of the multiple separation units is connected to a feed port of an adjacent separation unit so that the multiple separation units are sequentially connected in series, the waste is configured to be able to perform a spiral motion in a separation chamber of the separation unit to achieve separation of organic matter and inorganic matter, and the content of organic matter in the waste discharged from the overflow port of the separation unit is higher than the content of organic matter in the waste discharged from the underflow port of the separation unit; Discharging the waste discharged from the overflow port of the separation device into an ultrasonic reactor for ultrasonic treatment; The ultrasonically treated waste is transported back to the anaerobic digestion unit.

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

3. A waste bypass treatment device, characterized in that: include: A separation device, comprising one or more separation units, wherein the separation unit has a separation chamber, and a feed port, an underflow port and an overflow port connected to the separation chamber, wherein the overflow port of one of the plurality of separation units is connected to the feed port of an adjacent separation unit so that the plurality of separation units are sequentially connected in series, and the separation unit is configured to separate organic matter from inorganic matter in the waste by spiral motion of the waste in its separation chamber so that the content of organic matter in the waste discharged from the overflow port of the separation unit is higher than the content of organic matter in the waste discharged from the underflow port of the separation unit; and an ultrasonic reactor, the inlet of which is in communication with the overflow port of the separation device, and the ultrasonic reactor is configured to perform ultrasonic treatment on the waste; The feed inlet of the separation device is arranged to communicate with the discharge outlet of the anaerobic digestion device, and the outlet of the ultrasonic reactor is arranged to communicate with the return port of the anaerobic digestion device.

4. The waste bypass treatment device according to claim 3, characterized in that: The separation device includes the plurality of separation units, and further includes: An outer cylinder body, in which at least one partition is provided to divide the space inside the outer cylinder body into a plurality of separation chambers; and A plurality of inner cones are arranged in a one-to-one correspondence in the plurality of separation chambers, and the small end of the inner cone faces the side where the feed port and the overflow port communicating with the corresponding separation chamber are located, and the large end of the inner cone is close to the bottom flow port communicating with the corresponding separation chamber; Wherein, 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 partition includes a spiral body, which includes a cylindrical portion and spiral blades. The spiral blades are arranged 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 partition, and the outlet of the spiral flow channel is connected to the feed port of the separation chamber on the other side of the partition.

6. The waste bypass treatment device according to claim 5, characterized in that: The separation device comprises two separation units, two inner cones and a partition. The two separation units are respectively a first-stage separation unit and a second-stage separation unit, 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 respectively a first inner cone and a second inner cone, the first inner cone is arranged in the separation chamber of the first-stage separation unit, and the small head end of the first inner cone faces the side where the feed port and overflow port of the first-stage separation unit are located, and the large head end of the first inner cone is close to the bottom flow port of the first-stage separation unit; the second inner cone is arranged in the separation chamber of the second-stage separation unit, and the small head end of the second inner cone faces the side where the feed port and overflow port of the second-stage separation unit are located, and the large head end of the second inner cone is close to the bottom flow port of the second-stage separation unit.

7. The waste bypass treatment device according to claim 6, characterized in that: A first connecting cavity is provided in the cylindrical part, a discharge port is provided in the outer cylinder, an 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 with 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 section and a first cylindrical section, the small end of the first conical section faces the partition, one end of the first cylindrical section is connected to the large end of the first conical section, and the other end of the first cylindrical section 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 partition, 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, and the first end wall of the outer cylinder is arranged opposite to the second end wall; The feed port of the first-stage separation unit, the bottom flow port of the first-stage separation unit and the bottom flow port of the second-stage separation unit are all arranged on the side wall of the outer cylinder, and the feed port and the discharge port of the first-stage separation unit are both close to the partition and arranged opposite to each other, the bottom flow port of the first-stage separation unit is close to the second end wall of the outer cylinder, and the bottom flow port 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 size of the separation device satisfies at least one of the following: The inner diameter D of the outer cylinder is: 50mm≤D≤250mm; The diameter d of the feed port of the first-stage separation unit is: d≤0.25D; The diameter O1 of the overflow port of the first-stage separation unit is: O1≤0.25D, and the diameter O2 of the overflow port of the second-stage separation unit is: O2≤0.25D; 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: 0.4D≤l1≤0.8D, and 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: 0.4D≤l2≤0.8D; The diameter U1 of the bottom flow outlet of the first-stage separation unit is: U1≤0.15D, and the diameter U2 of the bottom flow outlet of the second-stage separation unit is: U2≤0.15D; The diameter F of the discharge port is: F ≥ O2; The distance L1 between the partition and the large end of the first tapered section is: 3.0D≤L1≤6.0D, and the distance L2 between the partition and the large end of the second tapered section is: 3.0D≤L2≤6.0D; The diameter D1 of the large end of the first tapered section is: D1≤0.80D, and the diameter D2 of the large end of the second tapered section is: D2≤0.80D; The height h1 of the first tapered section is: 2.0D≤h1≤3.5D, and the height h2 of the second tapered section is: 2.0D≤h2≤3.5D; The height G1 of the first columnar segment is: 0.5D1≤G1≤1.5D1, and the height G2 of the second columnar segment is: 0.5D2≤G2≤1.5D2; The cone angle θ1 of the first cone section is: 16°≤θ1≤24°, and the cone angle θ2 of the second cone section is: 16°≤θ2≤24°; The number of turns of the spiral blade is: 2-6; The helical angle β of the spiral blade is: 0°≤β≤30°; The outer diameter N of the columnar portion is: N≤0.80D.

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

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

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