Efficient organic garbage pretreatment system and method thereof

Abstract

The efficient organic waste pretreatment system comprises a hydraulic decomposition and separation mechanism, a sand and impurity removal mechanism, a heat exchange and heating mechanism, a grease pre-concentration mechanism and a grease separation and size mixing mechanism which are sequentially arranged along the organic waste treatment process, and light and heavy fine impurities are efficiently removed in the same impurity removal equipment. And multiple procedures of preheating, instantaneous heating, braising and the like are combined, so that the loss of organic matters is reduced, and meanwhile, the oil extraction rate is increased.

Description

Technical Field

[0001] This invention relates to the field of solid waste treatment technology, and in particular to a highly efficient organic waste pretreatment system and method, applicable to the pretreatment of organic waste such as kitchen waste, food waste, fruit and vegetable waste, and distiller's grains. Background Technology

[0002] With the acceleration of urbanization, the amount of organic waste such as kitchen waste and food scraps has increased dramatically, making it crucial to treat them efficiently, harmlessly, and in a resource-efficient manner.

[0003] Current organic waste pretreatment processes generally include steps such as bag breaking, crushing, screening, pulping, impurity removal, sand removal, and oil extraction, but they have the following significant drawbacks:

[0004] 1. In the pre-treatment stages such as bag breaking, crushing, and screening, a large amount of organic matter and oil are removed along with impurities, resulting in a decrease in the subsequent anaerobic biogas production potential and oil recovery rate.

[0005] 2. Sand removal and removal of fine and light impurities (light floating matter) are completed in two separate devices, and the impurity removal device uses fine screen centrifugation, which will cause organic matter to be carried away and lost.

[0006] 3. The thermal efficiency of direct steam flow inside the tank is low, and the lack of a simmering process results in insufficient cell wall disruption of fat cells, leading to a low oil extraction rate.

[0007] Therefore, how to reduce organic matter loss while increasing oil extraction rate in the pretreatment of organic waste is a technical problem that urgently needs to be solved. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a highly efficient organic waste pretreatment system and method that can reduce organic matter loss while increasing oil extraction rate.

[0009] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0010] This invention provides a high-efficiency organic waste pretreatment system, comprising, sequentially arranged along the organic waste treatment process, a hydraulic decomposition and separation mechanism, a sand and impurity removal mechanism, a heat exchange and heating mechanism, an oil pre-concentration mechanism, and an oil separation and slurry preparation mechanism. The hydraulic decomposition and separation mechanism includes a hydraulic decomposition separator, an impurity separator, and an impurity dewatering machine. The hydraulic decomposition separator decomposes solid waste and slurries organic matter through a hydraulic turbulence field generated by rotation, separating undecomposed impurities. The impurity separator and the impurity dewatering machine work together to perform solid-liquid separation and dewatering of undecomposed impurities, and discharge large impurities. The sand and impurity removal mechanism includes a coarse slurry tank, a compound impurity remover, and a heavy slag separator. The coarse slurry tank is used to temporarily store the organic slurry separated by the hydraulic decomposition and separation mechanism. The compound impurity remover and the heavy slag separator work together to remove light floating matter and sand impurities from the organic slurry and discharge fine impurities. The heat exchange and heating mechanism includes a good slurry tank, a heat exchanger, and a steam heater. The good slurry tank is used to store good slurry. The heat exchanger is used to recover system heat energy and preheat cold slurry. The steam heater is used to instantly heat the preheated slurry to a set temperature; the oil pre-concentration mechanism includes a cooking tank and at least two hydrocyclones connected in series; the cooking tank is used to keep the heated slurry warm and cook it; the hydrocyclones are used to pre-concentrate the oil in the slurry to form an oil-rich slurry; the oil separation and slurry conditioning mechanism includes an oil extraction tank, a centrifuge, an oil tank, a hot liquid tank, and a conditioning tank; the oil extraction tank is used to store the oil-rich slurry output from the hydrocyclones; the centrifuge is used to pre-concentrate... Crude grease, organic liquid phase, and organic solid phase are separated from the oil-rich slurry. The grease tank is used to store the crude grease separated by the centrifuge. The hot liquid tank is used to store the hot slurry separated by the centrifuge. The slurry mixing tank is used to mix the deoiled slurry separated by the hydrocyclone and the organic liquid phase and organic solid phase separated by the hot liquid tank after passing through the heat exchanger. Depending on the oil content of the organic waste being treated, the heat exchange heating mechanism, the grease pre-concentration mechanism, and the grease separation and slurry mixing mechanism can be selectively activated or bypassed.

[0011] Furthermore, the hydraulic decomposition separator includes a tank, a first rotor disposed in the tank, a first screen plate, a baffle plate, a fixed blade assembly, and a first drive mechanism; the first rotor includes a chassis and blades with toothed cutting edges; or the first rotor includes a chassis, a column, and guide spiral blades with toothed cutting edges; a moving blade assembly is disposed on the chassis; the fixed blade assembly surrounds the rotation trajectory of the moving blade assembly, and the fixed blade assembly and the moving blade assembly are disposed at a preset gap.

[0012] Furthermore, the hydraulic decomposition separator also includes a movable anti-clogging mechanism; the anti-clogging mechanism includes pins corresponding to the sieve holes of the first sieve plate for periodically cleaning the sieve holes.

[0013] Furthermore, the compound impurity removal machine includes a cylindrical body, a cyclone desander, a second rotor, a second screen plate, a second drive mechanism, a good pulp chamber, a pulp inlet, a light slag outlet, a heavy slag outlet, and a good pulp outlet; the pulp inlet and the heavy slag outlet are respectively tangentially arranged on the outer periphery of the cylindrical body; the light slag outlet is located in a recess at the center of one end of the cylindrical body; the heavy slag outlet is connected to the cyclone desander; the second rotor is located on the opposite side of the light slag outlet, and the second screen plate is located on the side of the second rotor away from the light slag outlet.

[0014] Furthermore, the second rotor includes a set of rotating blades, and the set of blades and the second screen plate are arranged at a preset distance; when the second rotor rotates, a negative pressure is formed on the surface of the second screen plate to promote the passage of good pulp through the second screen plate into the good pulp chamber.

[0015] Furthermore, the connecting pipes for the light slag discharge port and the good slurry discharge port are both higher than the top of the cylindrical body, and each connecting pipe is equipped with a flow regulating valve.

[0016] Furthermore, the sand and impurities separated by the cyclone desander are discharged from the bottom; the top flow slurry separated by the cyclone desander is returned to the slurry inlet to achieve circulating sand removal.

[0017] Furthermore, the hydrocyclone is a long conical hydrocyclone and is arranged at an angle; the hydrocyclone is equipped with a control system for adjusting the pressure parameters of its various inlets and outlets.

[0018] This invention provides a highly efficient organic waste pretreatment method, employing the aforementioned highly efficient organic waste pretreatment system, comprising the following steps: S1, conveying raw organic waste to a hydraulic decomposition and separation mechanism, where slurry formation and impurity separation are achieved through hydraulic turbulence, and the separated organic slurry is temporarily stored; S2, pumping the organic slurry from S1 into a sand and impurity removal mechanism, where light particles and sand are simultaneously removed through centrifugal vortex and vortex center processes to obtain a good slurry; S3, preheating the good slurry from S2 using system waste heat recovered through a heat exchanger, and then subjecting it to instantaneous steam treatment. Heating; S4, the heated slurry from S3 is transported to the cooking tank of the oil pre-concentration unit for cooking to promote the full separation of fat. The cooked slurry is then pumped into the hydrocyclone of the oil pre-concentration unit and pre-concentrated through multi-stage hydrocyclone to obtain oil-rich slurry and de-oiled slurry; S5, the oil-rich slurry is pumped into the oil separation and conditioning unit to separate crude oil. At the same time, the separated organic solid phase, organic liquid phase and the de-oiled slurry from S4 are mixed and blended to form an organic slurry. After heat exchange and cooling, it is transported to the anaerobic treatment system of the next process.

[0019] Furthermore, steps S3, S4, and S5 are selectively executed based on the oil content of the organic waste being processed.

[0020] The technical solution provided by this invention has the following beneficial effects:

[0021] 1. Compared with traditional pretreatment processes, this invention can significantly improve the oil recovery rate and organic matter recovery rate, thereby greatly increasing resource utilization benefits. At the same time, the pretreatment waste residue rate is reduced by more than 30%, realizing waste reduction treatment and thus effectively improving the resource recovery rate.

[0022] 2. This invention reduces unit processing energy consumption by more than 18% and significantly lowers operating costs through process simplification and energy recovery.

[0023] 3. The present invention adopts a highly integrated modular design, which makes the layout of the entire pretreatment system compact and saves 40% of the floor space compared with traditional pretreatment processes, effectively reducing the initial civil engineering investment of the project and saving land investment costs.

[0024] 4. The single-line processing capacity of this invention significantly exceeds that of traditional pretreatment processes (reaching 100-500 tons / hour or higher), making it suitable for the processing needs of large and medium-sized cities. Furthermore, this invention is highly adaptable to raw materials, effectively processing poorly sorted household kitchen waste, and can combine organic waste from different sources such as food waste, household kitchen waste, and fruit and vegetable waste for simultaneous processing, thus addressing the industry pain point of traditional pretreatment processes requiring high-quality raw materials.

[0025] 5. By eliminating the need for pretreatment through the hydraulic decomposition and separation mechanism, the maximum amount of organic matter and oil can be retained from the source, which lays the foundation for the efficient operation of the subsequent sand and impurity removal mechanism and oil separation and slurry conditioning mechanism.

[0026] 6. The dual-stage impurity removal system efficiently removes both light and heavy fine impurities within the same equipment, resulting in a high-purity slurry or organic slurry. This reduces organic matter loss, significantly lowering the risk of scaling and clogging in subsequent heat exchangers and reducing centrifuge wear, ensuring long-term stable operation of the entire system. It also shortens the process flow, reducing equipment investment and operating costs.

[0027] 7. By combining or integrating multiple processes such as preheating, instant heating, and simmering, the oil recovery rate can be increased by 50%, and the problem of insufficient cell wall breaking during simple heating can be solved.

[0028] 8. The present invention can flexibly adjust the processing flow according to the characteristics of the waste, thereby avoiding energy and equipment waste when processing low-oil or non-oil-containing waste, and thus achieving dynamic optimization. Attached Figure Description

[0029] Figure 1 The diagram shown is a connection diagram of the high-efficiency organic waste pretreatment system in Example 1;

[0030] Figure 2 The diagram shown is a schematic of the hydraulic decomposition separator in Example 1;

[0031] Figure 3 The image shown is a first-view schematic diagram of the compound cleaning machine in Embodiment 1;

[0032] Figure 4 The diagram shown is a second-view schematic of the compound cleaning machine in Embodiment 1. Detailed Implementation

[0033] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0034] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] Reference Figures 1 to 4 Example 1 provides a high-efficiency organic waste pretreatment system (hereinafter referred to as the pretreatment system), which adopts a modular design and can flexibly start or stop or bypass specific modules according to the characteristics of the treated object (such as oil content). For example, when treating fruit and vegetable waste, only hydraulic decomposition and separation and sand and impurity removal are required before slurry preparation. When treating high-oil-content kitchen waste, pre-concentration can be selectively not activated, thereby achieving optimal configuration of energy and equipment.

[0037] like Figure 1 As shown, the pretreatment system of this embodiment includes a hydraulic decomposition and separation mechanism 1, a sand and impurity removal mechanism 2, a heat exchange and heating mechanism 3, an oil pre-concentration mechanism 4, and an oil separation and slurry preparation mechanism 5 arranged sequentially along the organic waste treatment process. Each mechanism is modularly designed, and the heat exchange and heating mechanism 3, the oil pre-concentration mechanism 4, and the oil separation and slurry preparation mechanism 5 can be selectively started, stopped, or bypassed according to the oil content of the organic waste being treated.

[0038] The hydraulic decomposition and separation mechanism 1 includes a hydraulic decomposition separator 11, an impurity separator 12, and an impurity dewatering machine 13. The hydraulic decomposition separator 11 decomposes solid waste and slurries organic matter through a hydraulic turbulence field generated by rotation, and separates undecomposed impurities. The impurity separator 12 and the impurity dewatering machine 13 are used together to perform solid-liquid separation and dewatering of undecomposed impurities, and discharge large impurities.

[0039] The sand and impurity removal mechanism 2 includes a coarse slurry tank 21, a compound impurity remover 22, and a heavy slag separator 23. The coarse slurry tank 21 is used to temporarily store the organic slurry separated by the hydraulic decomposition separation mechanism 1. The compound impurity remover 22 and the heavy slag separator 23 are used together to remove light floating matter and sand impurities from the organic slurry and discharge fine impurities.

[0040] The heat exchange heating mechanism 3 includes a good slurry tank 31, a heat exchanger 32, and a steam heater 33. The good slurry tank 31 is used to store good slurry, the heat exchanger 32 is used to recover system heat energy and preheat cold slurry, and the steam heater 33 is used to instantly heat the preheated slurry to a set temperature.

[0041] The oil pre-concentration mechanism 4 includes a cooking tank 41 and two hydrocyclones 42 arranged in series. The cooking tank 41 is used to keep the heated slurry warm and cook it, while the hydrocyclones 42 are used to pre-concentrate the oil in the slurry to form an oil-rich slurry. Specifically, the hydrocyclones 42 are long conical hydrocyclones arranged at an angle. The hydrocyclones 42 are also equipped with a control system for adjusting the pressure parameters of their various inlets and outlets.

[0042] The oil separation and slurry preparation mechanism 5 includes an oil extraction tank 51, a centrifuge 52, an oil tank 53, a hot liquid tank 54, and a slurry preparation tank 55. The oil extraction tank 51 is used to store the oil-rich slurry output from the hydrocyclone 42. The centrifuge 52 is used to separate crude oil, organic liquid phase, and organic solid phase from the pre-concentrated oil-rich slurry. The oil tank 53 is used to store the crude oil separated by the centrifuge 52. The hot liquid tank 54 is used to store the hot slurry separated by the centrifuge 52. The slurry preparation tank 55 is used to mix the de-oiled slurry separated by the hydrocyclone 42 and the organic liquid phase and organic solid phase separated by the hot slurry from the hot liquid tank 54 after passing through the heat exchanger 32, and form an organic slurry.

[0043] In this embodiment, as Figure 2 As shown, the hydraulic decomposition separator 11 includes a tank 111, a first rotor 112 disposed in the tank 111, a first screen plate 113, a baffle plate 114, a fixed blade assembly 115, and a first drive mechanism 117 (i.e., including a first motor and a corresponding transmission mechanism). The first rotor 112 includes a chassis and blades with toothed cutting edges, and is suitable for pre-treatment of kitchen waste. A moving blade assembly 116 is disposed on the chassis, and the fixed blade assembly 115 rotates around the rotation trajectory of the moving blade assembly 116, with the fixed blade assembly 115 and the moving blade assembly 116 arranged at a preset gap. Of course, in other embodiments, the first rotor 112 includes a chassis, a column, and guide spiral blades with toothed cutting edges to match household kitchen waste or fruit and vegetable waste, etc.

[0044] like Figure 3 and Figure 4As shown, the compound impurity remover 22 includes a cylindrical body 221, a cyclone sand remover 222, a second rotor 223, a second screen plate 224, a second drive mechanism 225 (i.e., including a second motor and a corresponding transmission mechanism), a good pulp chamber 226, a pulp inlet 227, a light slag outlet 228, a heavy slag outlet 229, and a good pulp outlet 230. The pulp inlet 227 and the heavy slag outlet 229 are tangentially arranged on the outer periphery of the cylindrical body 221, and the light slag outlet 228 is located in the recess at the center of one end of the cylindrical body 221. The inlet 229 is connected to the hydrocyclone desander 222. The second rotor 223 is located on the opposite side of the light slag discharge outlet 228, and the second screen plate 224 is located on the side of the second rotor 223 away from the light slag discharge outlet 228. The connecting pipes of the light slag discharge outlet 228 and the good slurry discharge outlet 230 are both higher than the top of the cylindrical body 221, and the connecting pipes are equipped with flow regulating valves. The sand and impurities separated by the hydrocyclone desander 222 are discharged from its bottom, and the top flow slurry separated by the hydrocyclone desander 222 is returned to the slurry inlet 227 to achieve circulating sand removal.

[0045] In practical implementation, some machines or equipment in the pretreatment system of this embodiment can be connected to each other through various pumps, and the pretreatment system of this embodiment can achieve efficient pretreatment of organic waste. The specific pretreatment method includes the following steps:

[0046] Step S1: The raw organic waste is transported to the hydraulic decomposition and separation unit 1, and the slurry is separated from impurities through hydraulic turbulence, and the separated organic slurry is temporarily stored.

[0047] In step S2, the organic slurry is pumped into the sand and impurity removal unit 2, and light floating matter and sand and impurities are removed simultaneously by cyclone centrifugation and vortex center to obtain good slurry.

[0048] In step S3, the good slurry is first preheated by the system waste heat recovered by heat exchanger 32, and then instantaneously heated by steam.

[0049] In step S4, the heated slurry is transported to the cooking tank 41 of the oil pre-concentration mechanism 4 for cooking to promote the full separation of fat. Then, the cooked slurry is pumped into the hydrocyclone 42 of the oil pre-concentration mechanism 4 and the oil is pre-concentrated through multi-stage hydrocyclone to obtain oil-rich slurry and de-oiled slurry.

[0050] In step S5, the oil-rich slurry is pumped into the oil separation and slurry preparation unit 5 to separate the crude oil. At the same time, the separated organic solid phase, organic liquid phase and de-oiled slurry are mixed and blended to form an organic slurry. After being cooled by heat exchange, it is transported to the anaerobic treatment system of the next process.

[0051] In summary, the pretreatment system of this embodiment has the advantages of compact and simplified process, high processing efficiency and high resource recovery rate. Through innovative device design and organic combination of modular processes, it can significantly improve the organic matter recovery rate (more than 70%) and oil extraction rate (more than 50%), and the process flow can be flexibly adjusted according to the characteristics of the waste.

[0052] Of course, in other embodiments, steps S3, S4 and S5 may be selectively performed depending on the oil content of the organic waste being processed.

[0053] In a further preferred embodiment, the hydraulic decomposition separator 11 also includes a movable anti-clogging mechanism, which includes pins corresponding to the sieve holes of the first sieve plate 113 for periodically cleaning the sieve holes.

[0054] More preferably, the second rotor 223 includes a set of blades in a rotating direction, the set of blades and the second screen plate 224 are arranged at a preset distance, and when the second rotor 223 rotates, a negative pressure is formed on the surface of the second screen plate 224 to promote the good pulp to pass through the second screen plate 224 and enter the good pulp chamber 226.

[0055] In addition, this embodiment has significant technical advantages compared with traditional pretreatment processes, as shown in Table 1.

[0056] Traditional pretreatment processes include bag breaking, crushing, screening, pressing and pulping, and centrifugal oil extraction.

[0057] Table 1: Comparative Data of Two Sets of Organic Waste After One Month of Stabilized Pretreatment

[0058]

[0059]

[0060] Note: The above data is the average of multiple measurements.

[0061] As can be seen from the above comparison, this embodiment not only achieves a qualitative leap in key indicators of resource recycling, but also comprehensively outperforms traditional pretreatment processes in terms of energy consumption, land occupation, processing capacity, and adaptability. Therefore, this embodiment, through the combination of systematic module integration and process innovation, can produce significant synergistic effects. Its technical effects are far beyond the simple superposition of existing technologies, fully demonstrating the outstanding substantive features and significant progress of this invention.

[0062] Example 2

[0063] The pretreatment system of Example 1 is used to treat kitchen waste, and the specific treatment method is as follows:

[0064] Raw kitchen waste is first fed directly into the hydraulic decomposition separator without any pretreatment. The high-speed rotation of the first rotor and the combination of the toothed blades and the guide spiral blades create a strong turbulent flow, which decomposes the kitchen waste into organic slurry. At the same time, solid impurities such as plastic bags and bottles are separated and discharged.

[0065] After the organic slurry is temporarily stored, it is pumped into the compound impurity remover. At this time, the organic slurry enters the inner wall of the cylinder tangentially and forms a vortex. Light floating objects (such as plastic sheets) gather towards the center and are discharged from the light slag outlet. Heavy impurities such as sand and dirt move along the wall under the action of centrifugal force and enter the cyclone sand remover from the heavy slag outlet for further separation. At the same time, good slurry passes through the second screen plate and enters the good slurry chamber.

[0066] The lower-temperature slurry is first heated by exchanging heat with the hot slurry output from the mixing tank through a heat exchanger, and then heated to 85°C by a steam heater. It is then cooked in a cooking tank for 60 minutes to allow the fat to be fully extracted.

[0067] The cooked slurry is then pumped into a two-stage hydrocyclone for concentration, yielding an oil-rich slurry. Of course, the start / stop or bypass can be selected based on the oil content of the slurry.

[0068] Finally, the oil-rich slurry is pumped into a centrifuge to separate the crude oil product and the organic solid and liquid phases. The organic solid and liquid phases are then mixed evenly with the deoiled slurry produced by pre-concentration in a mixing tank to form an organic slurry.

[0069] Of course, the well-mixed organic slurry can be passed through a heat exchanger to transfer heat to the cold slurry at the front end, and then pumped into the next anaerobic treatment system for anaerobic fermentation.

[0070] Example 3

[0071] The pretreatment system of Example 1 is used to treat oil-free fruit and vegetable waste. The specific treatment method is as follows:

[0072] Fruit and vegetable waste is directly fed into a hydraulic decomposition separator, where it is pulped with the help of toothed blades and guide spiral blades. The organic slurry then passes through a compound impurity remover to remove light and heavy fine impurities, resulting in a clean slurry. After that, it skips the intermediate process and enters the slurry conditioning tank for simple conditioning, or is mixed with a small amount of other slurries before being pumped into the next anaerobic treatment system for anaerobic fermentation. This greatly simplifies the production process and minimizes energy consumption.

[0073] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A high-efficiency organic waste pretreatment system, characterized in that: The organic waste treatment process includes a hydraulic decomposition and separation mechanism, a sand and impurity removal mechanism, a heat exchange and heating mechanism, an oil pre-concentration mechanism, and an oil separation and slurry preparation mechanism, which are arranged sequentially along the organic waste treatment process. The hydraulic decomposition and separation mechanism includes a hydraulic decomposition separator, an impurity separator, and an impurity dewatering machine. The hydraulic decomposition separator decomposes solid waste and slurries organic matter through a hydraulic turbulence field generated by rotation, and separates undecomposed impurities. The impurity separator and the impurity dewatering machine are used together to perform solid-liquid separation and dewatering of undecomposed impurities, and discharge large impurities. The sand and impurity removal mechanism includes a coarse slurry tank, a compound impurity remover, and a heavy slag separator; the coarse slurry tank is used to temporarily store the organic slurry separated by the hydraulic decomposition and separation mechanism; the compound impurity remover and the heavy slag separator are used together to remove light floating matter and sand impurities from the organic slurry and discharge fine impurities; The heat exchange heating mechanism includes a good slurry tank, a heat exchanger, and a steam heater; the good slurry tank is used to store good slurry; the heat exchanger is used to recover system heat energy and preheat cold slurry; the steam heater is used to instantly heat the preheated slurry to a set temperature; The oil pre-concentration mechanism includes a cooking tank and at least two hydrocyclones connected in series; the cooking tank is used to keep the heated slurry warm and cook it; the hydrocyclones are used to pre-concentrate the oil in the slurry and form an oil-rich slurry. The oil separation and slurry preparation mechanism includes an oil extraction tank, a centrifuge, an oil tank, a hot liquid tank, and a slurry preparation tank; the oil extraction tank is used to store the oil-rich slurry output from the hydrocyclone; the centrifuge is used to separate crude oil, organic liquid phase, and organic solid phase from the pre-concentrated oil-rich slurry; the oil tank is used to store the crude oil separated by the centrifuge. The hot liquid tank is used to store the hot slurry separated by the centrifuge; The mixing tank is used to mix the deoiled slurry separated by the hydrocyclone and the organic liquid phase and organic solid phase separated by the heat exchanger from the hot slurry in the hydrothermal tank. Depending on the oil content of the organic waste being processed, the heat exchange heating mechanism, the oil pre-concentration mechanism, and the oil separation and slurry preparation mechanism may be selectively activated or bypassed.

2. The high-efficiency organic waste pretreatment system according to claim 1, characterized in that: The hydraulic decomposition separator includes a tank, a first rotor disposed in the tank, a first screen plate, a baffle plate, a fixed blade assembly, and a first drive mechanism; the first rotor includes a chassis and blades with toothed cutting edges; or the first rotor includes a chassis, a column, and guide spiral blades with toothed cutting edges; a moving blade assembly is disposed on the chassis; the fixed blade assembly is arranged around the rotation trajectory of the moving blade assembly, and the fixed blade assembly and the moving blade assembly are arranged with a preset gap.

3. The high-efficiency organic waste pretreatment system according to claim 2, characterized in that: The hydraulic decomposition separator also includes a movable anti-clogging mechanism; the anti-clogging mechanism includes pins corresponding to the sieve holes of the first sieve plate for periodically cleaning the sieve holes.

4. The high-efficiency organic waste pretreatment system according to claim 1, characterized in that: The compound impurity removal machine includes a cylindrical body, a hydrocyclone desander, a second rotor, a second screen plate, a second drive mechanism, a good pulp chamber, a pulp inlet, a light slag outlet, a heavy slag outlet, and a good pulp outlet; the pulp inlet and the heavy slag outlet are respectively tangentially arranged on the outer periphery of the cylindrical body; the light slag outlet is located in a recess at the center of one end of the cylindrical body; the heavy slag outlet is connected to the hydrocyclone desander; the second rotor is located on the opposite side of the light slag outlet, and the second screen plate is located on the side of the second rotor away from the light slag outlet.

5. The high-efficiency organic waste pretreatment system according to claim 4, characterized in that: The second rotor includes a set of rotating blades, and the set of blades and the second screen plate are arranged at a preset distance; when the second rotor rotates, a negative pressure is formed on the surface of the second screen plate to promote the passage of good pulp through the second screen plate into the good pulp chamber.

6. The high-efficiency organic waste pretreatment system according to claim 4, characterized in that: The connecting pipes for the light slag discharge port and the good slurry discharge port are both higher than the top of the cylindrical body, and each connecting pipe is equipped with a flow regulating valve.

7. The high-efficiency organic waste pretreatment system according to claim 4, characterized in that: The sand and impurities separated by the cyclone separator are discharged from the bottom; the top flow slurry separated by the cyclone separator is returned to the slurry inlet to achieve circulating sand removal.

8. The high-efficiency organic waste pretreatment system according to claim 1, characterized in that: The hydrocyclone is a long conical hydrocyclone and is arranged at an angle; the hydrocyclone is equipped with a control system for adjusting the pressure parameters of its various inlets and outlets.

9. A method for pretreating efficient organic waste, wherein the efficient organic waste pretreatment system described in any one of claims 1-8 is used for pretreatment, characterized in that, Includes the following steps: S1 transports raw organic waste to a hydraulic decomposition and separation unit, and achieves slurrying and impurity separation through hydraulic turbulence, while temporarily storing the separated organic slurry; S2, the organic slurry from S1 is pumped into the sand and impurity removal mechanism, and light floating matter and sand and impurities are removed simultaneously by cyclone centrifugation and vortex center to obtain good slurry; S3, the good slurry of S2 is first preheated by the system waste heat recovered by the heat exchanger, and then instantaneously heated by steam; S4, the heated slurry from S3 is transported to the cooking tank of the oil pre-concentration mechanism for cooking to promote the full separation of fat. Then the cooked slurry is pumped into the hydrocyclone of the oil pre-concentration mechanism and the oil is pre-concentrated through multi-stage hydrocyclone to obtain oil-rich slurry and de-oiled slurry. S5 pumps the oil-rich slurry into the oil separation and slurry preparation unit to separate the crude oil. At the same time, the separated organic solid phase, organic liquid phase and the de-oiled slurry from S4 are mixed and blended to form an organic slurry. After heat exchange and cooling, it is transported to the next process anaerobic treatment system.

10. The efficient organic waste pretreatment method according to claim 9, characterized in that: Depending on the oil content of the organic waste being processed, steps S3, S4, and S5 are selectively executed.

Images