An organic waste cstr reactor

Abstract

The utility model belongs to kitchen garbage treatment equipment technical field discloses a kind of organic waste CSTR reactor, and organic waste CSTR reactor includes reactor body, annular pipeline, sand removal pipe and cyclone sand remover, the lower part of reactor body is equipped with multiple low sand removal ports, multiple low sand removal ports are distributed along the circumferential direction interval of reactor body, annular pipeline is arranged at the radial outer side of reactor body, annular pipeline is communicated with multiple low sand removal ports one-to-one by multiple first connecting pipelines, and first valve group is equipped on first connecting pipeline, one end of sand removal pipe is connected with annular pipeline, sand removal pump is equipped on sand removal pipe, the first communication port of cyclone sand remover is connected to the other end of sand removal pipe, and the second communication port of cyclone sand remover is used to be connected with horizontal flow sand removal machine. The organic waste CSTR reactor can solve the technical problem of bottom sand, without regular shutdown tank cleaning, ensure that organic waste CSTR reactor works stably.

Description

Technical Field

[0001] This utility model relates to the technical field of kitchen waste treatment equipment, and in particular to an organic waste CSTR reactor. Background Technology

[0002] Currently, the mainstream process for treating organic waste such as kitchen waste (including catering waste, household kitchen waste, and other kitchen waste) is a combination of pretreatment and anaerobic digestion, with the anaerobic digestion stage mainly employing wet anaerobic digestion. Furthermore, most large-scale kitchen waste treatment facilities use CSTR reactors (continuous stirred tank reactors) for wet anaerobic digestion.

[0003] In actual processing, even after pretreatment, the slurry generated from organic waste such as kitchen waste still contains a considerable amount of fine sand and impurities. These fine sand and impurities are denser than water and are difficult for anaerobic microorganisms to decompose quickly. When the CSTR reactor is in operation, the force of the central vertical mixer throws the denser fine sand towards the area near the reactor wall, causing sedimentation. As the CSTR reactor operates for an extended period, the amount of sand accumulating on the tank walls and inside the tank increases, significantly compressing the effective volume of the CSTR reactor and adversely affecting its normal operation.

[0004] like Figure 1 As shown, the mainstream sand removal device in the industry currently consists of a conical structure 200 installed at the center of the bottom of the CSTR reactor. Since the CSTR reactor is a relatively large reactor, most of it needs to be placed on the ground. Therefore, the conical structure 200 at the bottom is located below the ground. Then, a sand discharge pipe 300 is inserted downwards at an angle into the bottom of the conical structure 200, and a sand discharge pump 400 is connected to discharge the sand (see attached diagram). Figure 1 (Structure shown). However, on the one hand, due to the stirring of the central vertical agitator 100 in the CSTR reactor, the sand mainly settles near the tank wall; on the other hand, because the density of sand is much greater than that of water, the sand pump 400 and the downward-sloping sand discharge pipe 300 have difficulty pumping the sand smoothly from the bottom of the conical structure 200 to the ground. Industry experience also shows that this sand removal method is inefficient and ineffective.

[0005] According to case studies provided by manufacturers, when cleaning a CSTR reactor after five years of operation, it was discovered that the accumulated sand inside the tank reached a height of up to 2 meters, and the deposited sand was severely compacted, making cleaning extremely difficult. Cleaning a CSTR reactor often means the project has to face shutdown or reduced production, and the cleaning process is time-consuming and consumes significant human and material resources. Utility Model Content

[0006] The purpose of this invention is to provide an organic waste CSTR reactor that can solve the technical problem of bottom sedimentation in CSTR reactors, eliminate the need for periodic shutdown and tank cleaning, and ensure stable operation of the organic waste CSTR reactor.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] This utility model discloses an organic waste CSTR reactor comprising: a reactor body, wherein the lower part of the reactor body is provided with a plurality of low-level sand removal ports, the plurality of low-level sand removal ports being distributed at intervals along the circumference of the reactor body; an annular pipeline, the annular pipeline being disposed on the radially outer side of the reactor body, the annular pipeline being connected to the plurality of low-level sand removal ports one-to-one through a plurality of first connecting pipelines, and the first connecting pipelines being provided with a first valve group; a sand removal pipe, one end of the sand removal pipe being connected to the annular pipeline, the sand removal pipe being provided with a sand removal pump; and a cyclone sand remover, the first connecting port of the cyclone sand remover being connected to the other end of the sand removal pipe, and the second connecting port of the cyclone sand remover being used to connect to a horizontal flow sand remover.

[0009] In some embodiments, the center height of the low-position sand removal port is 150mm-500mm.

[0010] In some embodiments, the reactor body further includes a high-level sand removal port, which is set higher than the low-level sand removal port. The high-level sand removal port is connected to the sand removal pipe through a second connecting pipe, and a second valve group is provided on the second connecting pipe.

[0011] In some specific embodiments, the center height of the high-level sand removal port is greater than 1.5m.

[0012] In some embodiments, the sand removal pipe is further provided with a third control valve, a check valve, a fourth control valve, a pressure gauge and a sampling port arranged in sequence, and the sand removal pump is located between the third control valve and the check valve.

[0013] In some specific embodiments, the inlet of the sand removal pump is connected to the third control valve via a first flexible connecting pipe, and the outlet of the sand removal pump is connected to the check valve via a second flexible connecting pipe.

[0014] In some embodiments, the third port of the cyclone desander is connected to the reactor body via a third connecting pipe, and a fifth control valve, a biogas isolation safety water seal, and a third valve group are sequentially provided on the third port.

[0015] In some embodiments, the organic waste CSTR reactor further includes a receiving tank, the liquid inlet of which is connected to the second communication port of the cyclone sand separator, and the liquid outlet of which is connected to the horizontal flow sand separator. The receiving tank is also equipped with a level switch, which is electrically connected to the sand removal pump.

[0016] In some specific embodiments, the organic waste CSTR reactor further includes: a sand conveying screw, the input end of which is connected to the waste outlet of the horizontal flow sand remover; a sand removal tank, which is connected to the output end of the sand conveying screw and is equipped with a level gauge; and a mixer, which is connected to the waste liquid outlet of the horizontal flow sand remover.

[0017] In some embodiments, the height of the cyclone desander is not lower than the top height of the reactor body.

[0018] The beneficial effects of this CSTR reactor for organic waste are as follows: In actual operation, multiple low-level sand removal ports are provided at the bottom of the reactor body. After the sand removal pump is turned on, the first valve group on the first connecting pipe is opened, and the working status of the cyclone sand remover is observed. After sand removal continues for about 5-10 minutes, the discharge of the cyclone sand remover is observed again. If no sand is discharged, the first valve group on the first connecting pipe is closed, and the first valve group of the adjacent first connecting pipe is opened. This process is repeated until the first valve groups of all the first connecting pipes have been opened once. Through the multiple low-level sand removal ports distributed at intervals along the circumference of the reactor body, the sand in the reactor body can be effectively discharged through the sand removal pump, achieving efficient sand removal and solving the technical problem of sand settling at the bottom of the CSTR reactor. The organic waste CSTR reactor does not need to be shut down and cleaned periodically, ensuring the stable operation of the organic waste CSTR reactor.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the existing organic waste CSTR reactor;

[0021] Figure 2 This is a schematic diagram of the organic waste CSTR reactor according to an embodiment of the present invention;

[0022] Figure 3 This is a partial structural schematic diagram of the organic waste CSTR reactor according to an embodiment of the present invention;

[0023] Figure 4This is a schematic diagram of the structure of the annular pipe according to an embodiment of the present invention;

[0024] Figure 5 yes Figure 4 A magnified diagram showing point A (circled).

[0025] Figure 6 yes Figure 5 A schematic diagram of the structure from another direction.

[0026] Figure label:

[0027] 100. Central vertical mixer; 200. Conical structure; 300. Sand discharge pipe; 400. Sand discharge pump; 1. Reactor body; 101. Low-level sand removal port; 102. High-level sand removal port; 2. Annular pipeline; 3. Sand removal pipe; 4. Cyclone sand separator; 5. First connecting pipeline; 6. Horizontal flow sand separator; 7. First valve group; 701. First pneumatic gate valve; 702. First manual gate valve; 8. Second valve group; 801. Second pneumatic gate valve; 802. Second manual gate valve; 9. Second connecting pipeline; 10. Third control valve ; 11. Check valve; 12. Fourth control valve; 13. Pressure gauge; 14. Sampling port; 15. First flexible connecting pipe; 16. Second flexible connecting pipe; 17. Third connecting pipe; 18. Fifth control valve; 19. Biogas isolation safety water seal; 20. Third valve group; 2001. Third pneumatic knife gate valve; 2002. Third manual knife gate valve; 21. Liquid receiving tank; 22. Liquid level switch; 23. Sand conveying screw; 24. Sand removal bucket; 25. Liquid level gauge; 26. Mixer; 27. Heavy liquid pipe; 28. Sixth control valve; 29. ​​Sand removal pump. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] This utility model discloses a CSTR reactor for organic waste, referencing... Figures 2-6 As shown, the organic waste CSTR reactor includes a reactor body 1, an annular pipeline 2, a sand removal pipe 3, and a cyclone sand remover 4. The lower part of the reactor body 1 is provided with multiple low-level sand removal ports 101, which are distributed at intervals along the circumference of the reactor body 1. The annular pipeline 2 is located on the radial outer side of the reactor body 1. The annular pipeline 2 is connected to the multiple low-level sand removal ports 101 one by one through multiple first connecting pipelines 5, and a first valve group 7 is provided on the first connecting pipeline 5. One end of the sand removal pipe 3 is connected to the annular pipeline 2, and a sand removal pump 29 is provided on the sand removal pipe 3. The first connecting port of the cyclone sand remover 4 is connected to the other end of the sand removal pipe 3, and the second connecting port of the cyclone sand remover 4 is used to connect to the horizontal flow sand remover 6. Understandably, in actual operation, since the lower part of the reactor body 1 is equipped with multiple low-level sand removal ports 101, when the sand removal pump 29 is turned on, the first valve group 7 on one of the first connecting pipes 5 is opened, and the working status of the cyclone sand remover 4 is observed. After sand removal continues for about 5 to 10 minutes, the discharge of the cyclone sand remover 4 is observed again. If no sand is discharged, the first valve group 7 on the first connecting pipe 5 is closed, and the first valve group 7 of the adjacent first connecting pipe is opened. This process is repeated until the first valve group 7 of all the first connecting pipes 5 has been opened once. Through the multiple low-level sand removal ports 101 distributed circumferentially along the reactor body 1, the sand in the reactor body 1 can be effectively discharged through the sand removal pump 29, achieving efficient sand removal and solving the technical problem of sand settling at the bottom of the CSTR reactor. This eliminates the need for periodic shutdown and tank cleaning of the organic waste CSTR reactor, ensuring the stable operation of the organic waste CSTR reactor.

[0032] Optional, see reference Figure 2 and Figure 6 As shown, the first valve group 7 includes a first manual knife gate valve 702 and a first pneumatic knife gate valve 701 arranged sequentially. Of course, in other embodiments of this utility model, the first valve group 7 can also be selected with other control valves according to actual needs.

[0033] Optionally, the specific number of low-level sand removal ports 101 can be designed and optimized according to the size of the reactor body 1. For example, a 6000m³ organic waste CSTR reactor can be equipped with 6-8 low-level sand removal ports 101; a 9000m³ CSTR reactor can be designed with 8-10 low-level sand removal ports 101.

[0034] Optionally, the distance between the annular pipeline 2 and the reactor body 1 should ensure the normal installation and maintenance of subsequent valves, while avoiding excessive distance. The specific distance can be determined according to actual operating requirements. No specific restrictions are made on the spacing between the annular pipeline 2 and the reactor body 1 here.

[0035] Optionally, the ring pipe 2, the first connecting pipe 5, and the sand removal pipe 3 can all be made of Q235B, 304, or 316L materials. Of course, other materials can also be selected according to actual needs.

[0036] Optionally, the center height of the low-level sand removal port 101 is 150mm-500mm. Specifically, the center height of the low-level sand removal port 101 can be 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, 300mm, 310mm, 320mm, 330mm, 340mm, 350mm, 360mm, 370mm, 380mm, 390mm, 400mm, 410mm, 420mm, 430mm, 440mm, 450mm, 460mm, 470mm, 480mm, 490mm, or 500mm, or other values ​​within the range of 150mm-500mm, and is not limited to the above limitations. It is understandable that if the height of the low-level sand removal port 101 is too high or too low, it will affect the sand removal effect. In this embodiment, the center height of the low-level sand removal port 101 is set between 150mm and 500mm to ensure the sand removal effect and reduce the occurrence of excessive sand deposition inside the reactor body 1.

[0037] Optional, see reference Figure 2 As shown, the reactor body 1 also includes a high-level sand removal port 102, which is positioned higher than the low-level sand removal port 101. The high-level sand removal port 102 is connected to the sand removal pipe 3 via a second connecting pipe 9, and a second valve group 8 is provided on the second connecting pipe 9. It can be understood that adding a high-level sand removal port 102 above the low-level sand removal port 101 can further improve the sand removal effect.

[0038] Further optional, see reference Figure 2As shown, the second valve group 8 includes a second manual knife gate valve 802 and a second pneumatic knife gate valve 801 arranged sequentially. Of course, in other embodiments of this utility model, the second valve group 8 can also be selected with other control valves according to actual needs.

[0039] Alternatively, the center height of the high-level sand removal port 102 can be greater than 1.5m, specifically 1.5m, 1.6m, 1.7m, 1.8m, 1.9m, or 2m. Other parameters can also be selected based on the height of the reactor body 1.

[0040] Optional, see reference Figure 2 As shown, the desanding pipe 3 is also equipped with a third control valve 10, a check valve 11, a fourth control valve 12, a pressure gauge 13, and a sampling port 14 arranged in sequence. The desanding pump 29 is located between the third control valve 10 and the check valve 11. It can be understood that the third control valve 10 and the fourth control valve 12 are used to control the on / off state of the desanding pipe 3. In actual operation, the third control valve 10 and the fourth control valve 12 are normally closed and only need to be opened when desanding is required. The added check valve 11 prevents the medium in the desanding pipe 3 from flowing back into the reactor body 1, facilitating desanding. The pressure gauge 13 can monitor the pressure of the desanding pipe 3 in real time, and can promptly alert the staff when the pressure in the desanding pipe 3 is too high. The sampling port 14 allows staff to easily take samples and assess the desanding status.

[0041] Alternatively, both the third control valve 10 and the fourth control valve 12 can be manual knife gate valves for easy operation. Of course, in other embodiments of this utility model, the types of control valves 10 and 12 are selected according to actual needs and are not limited to manual knife gate valves.

[0042] Further optional, see reference Figure 2 As shown, the inlet of the sand removal pump 29 is connected to the third control valve 10 via the first flexible connecting pipe 15, and the outlet of the sand removal pump 29 is connected to the check valve 11 via the second flexible connecting pipe 16. It can be understood that the inlet and outlet of the sand removal pipe 3 are connected to the third control valve 10 and the check valve 11 respectively via the first flexible connecting pipe 15 and the second flexible connecting pipe 16. Compared to rigid connections, flexible connections facilitate connection while ensuring a tight seal. In embodiments of this utility model, the materials of the first flexible connecting pipe 15 and the second flexible connecting pipe 16 can be selected according to actual needs; no specific limitations are imposed on the materials of the first flexible connecting pipe 15 and the second flexible connecting pipe 16 here.

[0043] Optional, see reference Figure 2As shown, the third connecting port of the hydrocyclone desander 4 is connected to the reactor body 1 via the third connecting pipe 17. A fifth control valve 18, a biogas isolation safety water seal 19, and a third valve group 20 are sequentially installed on the third connecting port. It can be understood that the light liquid separated by the hydrocyclone desander 4 flows back to the reactor body 1 through the return pipe. Biogas is generated during the operation of the reactor body 1. The biogas isolation safety water seal 19 designed on the return pipe can prevent biogas backflow and improve the operational safety of the oil and gas waste CSTR reactor.

[0044] As a further optional step, to ensure smooth return flow, the slope of the third connecting pipe 17 is greater than 0.3%.

[0045] Further optional, see reference Figure 2 As shown, the third valve group 20 includes a third manual knife gate valve 2002 and a third pneumatic knife gate valve 2001 arranged sequentially. Of course, in other embodiments of this utility model, the third valve group 20 can also be selected with other control valves according to actual needs.

[0046] Optional, see reference Figure 2 As shown, the organic waste CSTR reactor also includes a receiving tank 21. The liquid inlet of the receiving tank 21 is connected to the second communication port of the hydrocyclone sand separator 4, and the liquid outlet of the receiving tank 21 is connected to the horizontal flow sand separator 6. A level switch 22 is also installed inside the receiving tank 21, and the level switch 22 is electrically connected to the sand separator pump 29. It can be understood that the receiving tank 21 is located below the hydrocyclone sand separator 4, and the level switch 22 is installed on the receiving tank 21. The level switch 22 is automatically interlocked with the sand separator pump 29; when the liquid level in the receiving tank 21 is too high, the sand separator pump 29 automatically shuts down.

[0047] Further optional, see reference Figure 2 As shown, the bottom of the receiving tank 21 is connected to the heavy liquid pipe 27, and the sixth control valve 28 is installed near the receiving tank 21. The heavy liquid pipe 27 leads to the horizontal flow sand remover 6. To prevent heavy liquid from accumulating and clogging the sand remover, the pipeline from the heavy liquid pipe 27 to the sand remover is designed with a slope of 1%-3%. The sixth control valve 28 can be a manual knife gate valve.

[0048] Further optional, see reference Figure 2 As shown, the sand removal pump 29 can also be set with the first pneumatic knife gate valve 701, the second pneumatic knife gate valve 801 and the third pneumatic knife gate valve 2001 for automatic control interlocking. When the sand removal pump 29 stops running, all the above control valves will close accordingly.

[0049] Further options are available, see reference. Figure 2As shown, the organic waste CSTR reactor also includes a sand conveying screw 23, a sand removal tank 24, and a mixer 26. The input end of the sand conveying screw 23 is connected to the waste outlet of the horizontal flow sand remover 6, and the sand removal tank 24 is connected to the output end of the sand conveying screw 23. The sand removal tank 24 is equipped with a level gauge 25, and the mixer 26 is connected to the waste liquid outlet of the horizontal flow sand remover 6. It can be understood that the clear liquid separated by the horizontal flow sand remover 6 enters the waste liquid tank, which is equipped with the mixer 26. The light liquid in the waste liquid tank can be pumped back to the reactor body 1 or the wastewater treatment plant of the project. The sand separated by the horizontal flow sand remover 6 is conveyed by the sand conveying screw 23 to the sand removal tank 24. The sand removal tank 24 is equipped with a level gauge 25. After the liquid level reaches a set height, the tank is changed, and the sand is transported to a landfill or a relevant treatment unit.

[0050] Optionally, the height of the cyclone separator 4 is not lower than the top height of the reactor body 1. This helps to improve the sand removal effect.

[0051] The specific working process of the organic waste CSTR reactor in this embodiment is described below. In the following description, there are eight low-level sand removal ports 101, numbered 1#-8# respectively, and the corresponding first valve group 7 is also numbered 1#-8#.

[0052] Step 1: Open the second valve group 8, the third valve group 20, the horizontal flow sand remover 6, the sand conveying screw 23, and the mixer 26 in sequence to ensure that each piece of equipment starts in order and prepares for the subsequent sand removal process.

[0053] Step 2: Start the desanding pump 29 to begin high-level desanding operation. During this process, it is necessary to closely monitor the changes in the pressure gauge 13 after the desanding pump 29, the reading of the liquid level switch 22 of the receiving tank 21, and the reading of the liquid level gauge 25 of the desanding tank 24 to ensure that all parameters are within the normal operating range, so as to ensure the stability and safety of the desanding process.

[0054] Step 3: Observe the discharge of the horizontal flow sand remover 6. If no sand is discharged, the first valve group 7 (numbered 1#) should be opened in time, and the second valve group 8 should be closed immediately. In this way, the sand removal port (numbered 1#) can be switched to perform the sand removal operation.

[0055] Step 4: After continuing sand removal for about 5-10 minutes, observe the output of the horizontal flow sand remover 6 again. If no sand is discharged, open the second valve group 8 (numbered 1#) and close the first valve group 7 (numbered 1#) in sequence, and then remove sand from the sand removal port (numbered 2#). This operation must be strictly performed in sequence to ensure the effectiveness of the sand removal.

[0056] Step 5: Following the operating methods of steps 3 and 4 above, proceed sequentially through sand removal ports numbered 2# to 8#. Pay particular attention to the discharge status of the sand removal machine when removing sand from port number 8#. Once it is confirmed that no sand is being discharged, open valve group 8 and promptly open valve group 8 (numbered 8#) to complete the sand removal process for port number 8#.

[0057] Step 6: After opening the second valve group 8 for about 5 minutes, turn off the sand removal pump 29, the second valve group 8, the third valve group 20, the horizontal flow sand removal machine 6, the sand conveying screw 23, the mixer 26, etc. in sequence. At this point, the sand removal work is completed.

[0058] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An organic waste CSTR reactor, characterized in that, include: The reactor body (1) has a plurality of low-level sand removal ports (101) at its lower part, and the plurality of low-level sand removal ports (101) are distributed at intervals along the circumference of the reactor body (1). The annular pipe (2) is arranged on the radial outside of the reactor body (1). The annular pipe (2) is connected to the multiple low-level sand removal ports (101) one by one through multiple first connecting pipes (5). A first valve group (7) is provided on the first connecting pipe (5). A sand removal pipe (3) is provided, one end of which is connected to the annular pipeline (2), and a sand removal pump (29) is provided on the sand removal pipe (3). A cyclone sand separator (4) is provided, with its first port connected to the other end of the sand removal pipe (3) and its second port connected to a horizontal flow sand separator (6).

2. The organic waste CSTR reactor according to claim 1, characterized in that, The center height of the low-position sand removal port (101) is 150mm-500mm.

3. The organic waste CSTR reactor according to claim 1, characterized in that, The reactor body (1) also includes a high-level sand removal port (102), which is set higher than the low-level sand removal port (101). The high-level sand removal port (102) is connected to the sand removal pipe (3) through a second connecting pipe (9), and a second valve group (8) is provided on the second connecting pipe (9).

4. The organic waste CSTR reactor according to claim 3, characterized in that, The center height of the high-level sand removal port (102) is greater than 1.5m.

5. The organic waste CSTR reactor according to claim 1, characterized in that, The sand removal pipe (3) is also provided with a third control valve (10), a check valve (11), a fourth control valve (12), a pressure gauge (13), and a sampling port (14) arranged in sequence. The sand removal pump (29) is located between the third control valve (10) and the check valve (11).

6. The organic waste CSTR reactor according to claim 5, characterized in that, The inlet of the sand removal pump (29) is connected to the third control valve (10) through the first flexible connecting pipe (15), and the outlet of the sand removal pump (29) is connected to the check valve (11) through the second flexible connecting pipe (16).

7. The organic waste CSTR reactor according to claim 1, characterized in that, The third connection port of the cyclone desander (4) is connected to the reactor body (1) through the third connecting pipe (17). The third connection port is provided with a fifth control valve (18), a biogas isolation safety water seal (19) and a third valve group (20) in sequence.

8. The organic waste CSTR reactor according to claim 1, characterized in that, It also includes a liquid receiving tank (21), the liquid inlet of which is connected to the second communication port of the cyclone sand separator (4), the liquid outlet of which is connected to the horizontal flow sand separator (6), and a liquid level switch (22) is also provided in the liquid receiving tank (21), which is electrically connected to the sand removal pump (29).

9. The organic waste CSTR reactor according to claim 8, characterized in that, Also includes: The input end of the sand conveying screw (23) is connected to the waste outlet of the horizontal flow sand remover (6); A sand removal tank (24) is connected to the output end of the sand conveying screw (23), and a level gauge (25) is provided in the sand removal tank (24). A mixer (26) is connected to the waste liquid outlet of the horizontal flow sand remover (6).

10. The organic waste CSTR reactor according to claim 1, characterized in that, The height of the cyclone sand separator (4) is not lower than the top height of the reactor body (1).

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