Sewage treatment device capable of collecting solid organic matters

Abstract

The invention discloses a sewage treatment device capable of collecting solid organic matters, which comprises a sewage pool and a solid collecting device arranged on the sewage pool, and further comprises a sewage inlet pipe for conveying sewage to be treated to the solid collecting device and a driving device for providing power to the solid collecting device. The solid collecting device comprises a rotating shaft, a shell and an inner cylinder, the rotating shaft is fixed to the center of the bottom face of the inner cylinder and rotationally connected with the shell, the inner cylinder is divided into two layers, a filter screen cavity is formed between the two layers, a stainless steel filter screen is arranged in the filter screen cavity, and a plurality of annular openings are formed in the side wall of the inner cylinder. And the annular opening is connected on the side wall of the inner cylinder through a connecting plate. The sewage treatment device capable of collecting the solid organic matters can be used for collecting the solid organic matters generated after phthalic anhydride tail gas water absorption.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, and in particular to a sewage treatment device capable of collecting solid organic matter. Background Art

[0002] Phthalic anhydride, also known as maleic anhydride for short, is an organic compound with the chemical formula C8H4O3. It is a white crystalline powder, insoluble in cold water, slightly soluble in hot water and ether, soluble in ethanol, pyridine, benzene, carbon disulfide, etc. It is an important organic chemical raw material and an important intermediate for the preparation of phthalate plasticizers, coatings, saccharin, dyes and organic compounds. At present, with o-xylene as the raw material and vanadium pentoxide as the catalyst, o-xylene and air undergo a gas-phase catalytic oxidation reaction at a temperature of 350-360°C to generate phthalic anhydride. Due to increasingly stringent environmental protection requirements, it is necessary to add a water absorption device before the tail gas treatment tower. The phthalic anhydride and by-products contained in the tail gas will produce solids after meeting water. The solids contain acidic organic matter with recycling value. If they are directly sent to the sewage treatment device for treatment, it will not only increase the load of the sewage treatment device, but also cause waste of resources. Summary of the invention

[0003] In view of this, the present invention provides a sewage treatment device with the function of collecting solid organic matter, which can recover acidic organic matter with recycling value before the sewage that absorbs phthalic anhydride tail gas enters the sewage treatment device, thereby reducing the liquid alkali used to neutralize the acidity of the sewage in the later stage.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A sewage treatment device capable of collecting solid organic matter comprises a sewage pool and a solid collecting device arranged on the sewage pool, and also comprises a sewage inlet pipe for conveying sewage to be treated to the solid collecting device and a driving device for providing power to the solid collecting device. The invention is characterized in that the solid collecting device comprises a rotating shaft, an outer shell and an inner cylinder, the rotating shaft is fixed on the center of the bottom surface of the inner cylinder, the rotating shaft and the outer shell are rotatably connected, the inner cylinder has two layers, a filter cavity is arranged between the two layers, a stainless steel filter is installed in the filter cavity, a plurality of groups of annular openings are arranged on the side wall of the inner cylinder, the annular openings are connected on the side wall of the inner cylinder by connecting plates, the sewage inlet pipe comprises a straight pipe and a curved pipe, the curved pipe controls the water flow direction of the outflow to be consistent with the rotation direction of the inner cylinder, that is, the outflow direction is along the rotation direction of the inner cylinder, and a certain power can be provided for the rotation of the inner cylinder.

[0006] Furthermore, a plurality of support columns are provided at the bottom of the sewage pool, and a first crossbeam and a second crossbeam are respectively provided on the support columns in different rows, a front support plate is provided on the first crossbeam, and a rear support plate is provided on the second crossbeam, and the front support plate and the rear support plate are respectively provided with through holes at the top, bearings are installed in the through holes, and the rotating shaft is rotatably connected to the front support plate and the rear support plate through bearings.

[0007] Furthermore, the outer shell is cylindrical with one end open, the opening is close to the front support plate, and the opening has an inward flange. The bottom of the outer shell is provided with a bearing seat, and a bearing is installed in the bearing seat. The rotating shaft passes through the bottom of the outer shell from the bearing seat and is fixed together by the bearing. A first belt pulley is provided on the rotating shaft between the back of the bottom of the outer shell and the rear support plate, and the first belt pulley is fixedly connected to the rotating shaft.

[0008] Furthermore, the driving device includes a motor, an output shaft arranged at an output end of the motor, and a second belt pulley arranged on the output shaft, wherein the second belt pulley is connected to the first belt pulley via a belt.

[0009] Furthermore, a notch is provided at the lowest point of the side wall of the shell, and the sewage flowing into the shell can flow into the sewage pool through the notch, and water retaining plates are respectively provided on both axial sides of the notch.

[0010] Furthermore, the inner cylinder has an outer shape of a cylinder with one end open, the inner cylinder is fixedly connected to the rotating shaft at the bottom, and a first baffle is provided on the side wall of the inner cylinder to prevent the sewage entering the inner cylinder from flowing out from the opening.

[0011] Furthermore, the connecting plate is divided into annular connecting plates along the annular direction and axial connecting plates along the axial direction. The axial connecting plates are arranged in pairs, and each pair is arranged on the same diameter of the inner cylinder. Fixed blocks are arranged on the axial connecting plates. The first fixed block and the second fixed block are arranged on the axial connecting plate on one side, and the third fixed block and the fourth fixed block are arranged on the axial connecting plate on the other side. The connecting line of the first fixed block and the third fixed block is on one side of the rotating shaft, and the connecting line of the second fixed block and the fourth fixed block is on the other side of the rotating shaft.

[0012] Furthermore, a skirt plate is arranged outside the first baffle plate, a water collecting box is arranged below the skirt plate, the water collecting box is fixed to the front support plate by a fixing part, a water outlet pipe is arranged below the water collecting box, a water flow indicator is arranged in the water outlet pipe, and the water flow indicator is electrically connected to a sewage pump that provides sewage to the sewage inlet pipe.

[0013] Furthermore, a trapezoidal slot is provided on the fixed block, the slot is inwardly expanding, and a matching baffle is installed in the slot; the solid collection device also includes a discharge plate, the discharge plate is L-shaped in shape, including a first plug block, a second plug block, a straight edge and a second baffle plate, the first plug block and the second plug block are arranged opposite to each other, the first plug block and the second plug block can be simultaneously inserted into the oppositely arranged fixed blocks on the same side of the rotating shaft, and the straight edge can abut against the bottom surface of the inner cylinder.

[0014] Furthermore, the slot on the fixed block is arranged obliquely, the shape of the baffle matches the slot, the first plug block and the second plug block of the unloading plate are respectively arranged in a V shape, the first plug block includes an upper first plug block and a lower first plug block, the second plug block includes an upper first plug block and a lower first plug block, and the straight edge divides the unloading plate into two layers, an upper layer and an lower layer.

[0015] The beneficial effects of the present invention are:

[0016] The sewage treatment device with solid organic matter collection function provided by the present invention can collect solid organic matter in sewage before the sewage enters the sewage pool. A stainless steel filter is installed in the filter cavity of the inner cylinder. The sewage containing solid organic matter is transported to the inner cylinder of the solid collection device through a sewage inlet pipe and flushed on the annular connecting plate of the inner cylinder through a curved pipe. The driving device drives the rotating shaft to rotate through a belt, thereby driving the inner cylinder to rotate, so that the sewage in the inner cylinder generates centrifugal force. The solid organic matter and water are separated by means of the stainless steel filter, that is, the solid organic matter remains in the inner cylinder, and the water flows into the outer shell through the stainless steel filter. The sewage flowing into the outer shell can automatically flow into the sewage pool under gravity, and no additional device is needed to transport the filtered sewage into the sewage pool. The setting of the curved pipe can convert part of the kinetic energy of the water flow into the kinetic energy of the inner cylinder rotation, which has the effect of energy saving and emission reduction. In addition, the solid organic matter generated by the absorption of phthalic anhydride tail gas water is acidic. When the filtered sewage is subjected to the next step of treatment, the amount of liquid alkali used in the neutralization process can be reduced, and the COD content in the subsequent treatment process can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 A schematic diagram of the structure of a sewage treatment device capable of collecting solid organic matter provided by the present invention;

[0019] Figure 2 for Figure 1 Another structural schematic diagram of a sewage treatment device having the function of collecting solid organic matter as shown in ;

[0020] Figure 3 for Figure 1 Another structural schematic diagram of a sewage treatment device having the function of collecting solid organic matter is shown in ;

[0021] Figure 4 for Figure 1 The schematic diagram of the housing structure shown in ;

[0022] Figure 5 for Figure 4 Another schematic diagram of the structure of the shell structure shown in;

[0023] Figure 6 This is a schematic diagram of the structure of the solid collection device in the embodiment;

[0024] Figure 7 for Figure 1 The schematic diagram of the inner cylinder structure shown in ;

[0025] Figure 8 for Figure 1 Another structural schematic diagram of the inner cylinder shown in ;

[0026] Fig. 9 for Figure 1 Another structural schematic diagram of the inner cylinder shown in ;

[0027] Fig.10 This is a schematic diagram of the structure of a fixed block in an embodiment of the present invention;

[0028] Fig.11 This is a schematic diagram of the baffle structure in an embodiment of the present invention;

[0029] Fig.12 This is a schematic diagram of the structure of a stripper plate in an embodiment of the present invention;

[0030] Fig.13 This is a schematic diagram of the structure of a fixed block in another embodiment of the present invention;

[0031] Fig.14 This is a schematic diagram of a baffle structure in another embodiment of the present invention;

[0032] Fig.15 It is a schematic diagram of the structure of a stripper plate in another embodiment of the present invention;

[0033] Fig.16 It is another structural schematic diagram of a stripper plate in another embodiment of the present invention;

[0034] In the figure: 100, a sewage treatment device for collecting solid organic matter; 1, a sewage tank; 11, a supporting column; 12, a first crossbeam; 121, a front supporting plate; 13, a second crossbeam; 131, a rear supporting plate; 2, a solid collecting device; 21, a rotating shaft; 211, a first belt pulley; 22, a housing; 221, a bearing seat; 222, a water retaining plate; 223, a fixing plate; 224, a reinforcing rib; 225, a notch; 23, an inner cylinder; 231, a first group of openings; 232, a second group of openings; 233, a connecting plate; 2331, an annular connecting plate; 2332, an axial connecting plate; 234, a fixing block; 2341, a first fixing block; 2342, a second fixing block; 2343, a third fixing block; 2344, a fourth fixing block; 2345, slot; 2346, stop bar; 235, first baffle plate; 2351, skirt plate; 236, filter cavity; 237, water collecting box; 2371, outlet pipe; 2372, water flow indicator; 2373, fixing piece; 24, unloading plate; 241, first plug block; 2411, upper first plug block; 2412, lower first plug block; 242, second plug block; 2421, upper second plug block; 2422, lower second plug block; 243, straight edge; 244, second baffle plate; 3, sewage inlet pipe; 31, straight pipe; 32, curved pipe; 4, prefabricated mounting table; 41, driving device; 411, motor; 412, output shaft; 413, second belt pulley; 414, belt; 42, controller; 43, fixing bracket. DETAILED DESCRIPTION

[0035] The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0036] refer to Figures 1 to 3 As shown, the present invention provides a sewage treatment device 100 with a function of collecting solid organic matter, comprising a sewage pool 1 and a solid collecting device 2 arranged on the sewage pool 1, and also comprising a sewage inlet pipe 3 for conveying the sewage to be treated to the solid collecting device 2. The sewage that absorbs the tail gas of phthalic anhydride, which contains recyclable acidic solid organic matter, is conveyed to the solid collecting device 2 through the sewage inlet pipe 3. The solid collecting device 2 can separate and collect the solid organic matter. The separated sewage flows into the sewage pool 1 for the next step of neutralization treatment, and the acidic solid organic matter with recycling value can be recovered. At the same time, the amount of liquid alkali used in the neutralization treatment unit is reduced, thereby reducing the amount of sewage and solid waste.

[0037] The sewage pool 1 is in the shape of a rectangular parallelepiped with an opening facing upward. A plurality of vertical support columns 11 are provided at the bottom of the sewage pool 1. The support columns 11 in different rows are provided with a first crossbeam 12 and a second crossbeam 13 respectively. The first crossbeam 12 is provided with a front support plate 121, and the second crossbeam 13 is provided with a rear support plate 131. The front support plate 121 and the rear support plate 131 are respectively provided with through holes (not shown in the figure) at the top, and bearings are installed in the through holes. The solid collection device 2 includes a rotating shaft 21, an outer shell 22 and an inner cylinder 23. The rotating shaft 21 is fixed on the bottom center of the inner cylinder 23, and the rotating shaft 21 and the outer shell 22 are rotatably connected. The two ends of the rotating shaft 21 pass through the bearings on the front support plate 121 and the rear support plate 131 respectively, and are rotatably connected. A prefabricated installation platform 4 is provided on the side of the sewage pool 1, and a fixed bracket 43 is provided on the top surface of the prefabricated installation platform 4. A driving device 41 is installed on the fixed bracket 43. The prefabricated installation platform 4 is made of concrete and has high strength, which can meet the long-term operation of the driving device 41. A controller 42 is also provided on the side of the prefabricated installation platform 4. The controller 42 is electrically connected to the driving device 41 and can control the start and stop and the speed of the driving device 41.

[0038] refer to Figure 2 As shown, a first belt pulley 211 is provided on the rotating shaft 21 between the back side of the bottom of the housing 22 and the rear support plate 131, and the first belt pulley 211 is fixedly connected to the rotating shaft 21. The driving device 41 includes a motor 411, an output shaft 412 provided at the output end of the motor 411, and a second belt pulley 413 provided on the output shaft 412. The second belt pulley 413 and the first belt pulley 211 are connected by a belt to achieve power transmission.

[0039] refer to Figure 4 and Figure 5 As shown, the outer shell 22 is cylindrical with one end open, the opening is close to the front support plate 121, and there is an inward flange at the opening (not shown in the figure). A bearing seat 221 is provided at the bottom of the outer shell 22, and a bearing (not shown in the figure) is installed in the bearing seat 221. The rotating shaft 21 passes through the bottom of the outer shell 22 from the bearing seat 221 and is fixed together by the bearing. A notch 225 is opened at the lowest point of the side wall of the outer shell 22, and the sewage flowing into the outer shell 22 can flow into the sewage pool 1 through the notch 225. Water retaining plates 222 are respectively provided on both sides of the axial direction of the notch 225. The inner cylinder 23 generates centrifugal force by rotation, so that the sewage entering the outer shell 22 has a speed along the tangential direction of the inner cylinder 23. The flange at the opening of the outer shell 22 and the provided water retaining plate 222 can prevent the sewage from splashing to the outside of the sewage pool 1.

[0040] refer to Figures 7-8As shown, the inner cylinder 23 has an outer shape of a cylinder with one end open. The inner cylinder 23 is fixedly connected to the rotating shaft 21 at the bottom. A first baffle plate 235 is provided on the side wall of the inner cylinder 23 to prevent the sewage entering the inner cylinder 23 from flowing out from the opening. The inner cylinder 23 is two-layered, and a filter cavity 236 is provided between the two layers. The filter cavity 236 can be inserted with a stainless steel filter. The side wall of the inner cylinder 23 is provided with a plurality of groups of annular openings along the axial direction. In this embodiment, the annular openings are specifically a first group of openings 231 and a second group of openings 232. The distance between the first group of openings 231 and the bottom of the inner cylinder 23 is about 10 cm, and the distance between the second group of openings 232 and the mouth of the inner cylinder 23 is about 10 cm. In this way, the stainless steel filter can be prevented from lacking support. The side wall of the inner cylinder 23 between the first group of openings 231 and the second group of openings 232 is connected by a connecting plate 233. The stainless steel filter in the filter cavity 236 can allow the sewage in the inner cylinder 23 to flow into the outer shell 22 through the first group of openings 231 and the second group of openings 232 .

[0041] refer to Figure 6 As shown, preferably, a skirt plate 2351 is arranged outside the first baffle plate 235, a water collecting box 237 is arranged below the skirt plate 2351, the water collecting box 237 is fixed on the front support plate 121 through a fixing member 2373, a water outlet pipe 2371 is arranged below the water collecting box 237, a water flow indicator 2372 is arranged in the water outlet pipe 2371, and the water flow indicator 2372 is electrically connected to a sewage pump (not shown in the figure) that provides sewage to the sewage inlet pipe 3. During operation, when there are too many solids in the solid collecting device 2, or the stainless steel filter screen in the inner cylinder 23 is blocked, causing sewage to overflow the first baffle plate 235 of the inner cylinder 23, the sewage will flow into the water collecting box 237, and flow into the pool 1 through the water outlet pipe 2371. At this time, the water flow indicator installed in the water outlet pipe 2371 will be activated, giving an electrical signal to control the sewage pump to stop outputting sewage, and an alarm will be issued to remind workers to go to the site to find out the situation.

[0042] refer to Fig. 9 As shown, the connecting plate 233 is divided into an annular connecting plate 2331 along the annular direction and an axial connecting plate 2332 along the axial direction. The axial connecting plates 2332 are arranged in pairs, and each pair is arranged on the same diameter of the inner cylinder 23, so that the inner cylinder 23 can be more stable when rotating. In this embodiment, two axial connecting plates 2332 are arranged, and fixed blocks 234 are arranged on the axial connecting plates 2332. A first fixed block 2341 and a second fixed block 2342 are arranged on the axial connecting plate 2332 on one side, and a third fixed block 2343 and a fourth fixed block 2344 are arranged on the axial connecting plate 2332 on the other side. The connecting line of the first fixed block 2341 and the third fixed block 2343 is on one side of the rotating shaft 21, and the connecting line of the second fixed block 2342 and the fourth fixed block 2344 is on the other side of the rotating shaft 21.

[0043] refer to Figure 7As shown, the sewage inlet pipe 3 is divided into a straight pipe 31 and a curved pipe 32. The curved pipe 32 controls the flow direction of the outflow water to be consistent with the rotation direction of the inner cylinder 23, that is, the outflow direction follows the rotation direction of the inner cylinder 23, which can provide a certain power for the rotation of the inner cylinder 23. The range of water flow impacting the inner cylinder 23 is controlled on the annular connecting plate 2331, which can avoid scouring and damaging the stainless steel filter screen during long-term operation.

[0044] refer to Figures 10-12 As shown, in some embodiments, a trapezoidal slot 2345 is provided on the fixed block 234, and the slot 2345 is in an inward expansion shape. When the inner cylinder 23 rotates, a matching baffle 2346 is installed in the slot 2345 to prevent the solid liquid from blocking the slot on the fixed block 234. The solid collecting device 2 is also provided with a discharge plate 24, which is L-shaped and includes a first plug block 241, a second plug block 242, a straight edge 243 and a second baffle plate 244. The first plug block 241 and the second plug block 242 are arranged opposite to each other. The first plug block 241 and the second plug block 242 can be simultaneously inserted into the fixed blocks 234 arranged opposite to each other on the same side of the rotating shaft 21, and the straight edge 243 can abut against the bottom surface of the inner cylinder 23. After running for a period of time, when the solid organic matter collected in the inner cylinder 23 needs to be discharged, the blocking strip 2346 on the fixed block 234 of the discharge plate 24 is removed. Here, the first fixed block 2341 and the third fixed block 2343 are taken as examples. Specifically, the first plug block 241 and the second plug block 242 of the discharge plate 24 are respectively inserted into the third fixed block 2343 and the first fixed block 2341, the second blocking plate 244 faces upward, the straight edge 243 is against the bottom of the inner cylinder 23, and the solid organic matter above the discharge plate 24 is removed by a tool. The solid organic matter that falls on the unloading plate 24 is removed and cleaned, and then turned over and removed into the fixed block 234. Specifically, the first plug block 241 and the second plug block 242 of the unloading plate 24 are respectively inserted into the first fixed block 2341 and the third fixed block 2343, with the second baffle plate 244 facing downward and the straight edge 243 against the bottom of the inner cylinder 23. The inner cylinder is slowly rotated until the second baffle plate 244 faces upward again, and the solid organic matter in the remaining half of the inner cylinder 23 can be removed using tools.

[0045] refer to Figures 13-16 As shown, in some embodiments, the slot 2345 on the fixed block 234 is arranged obliquely, the shape of the blocking bar 2346 matches the slot 2345, the first plug block 241 and the second plug block 242 of the stripper plate 24 are respectively arranged in a V shape, the first plug block 241 includes an upper first plug block 2411 and a lower first plug block 2412, the second plug block 242 includes an upper first plug block 2411 and a lower first plug block 2412, and the straight edge 243 divides the stripper plate 24 into upper and lower layers. Figure 8For example, when unloading, remove the blocking strips 2346 on the first fixed block 2341 and the third fixed block 2343, insert the upper first plug block 2411 into the slot 2345 on the third fixed block 2343, and insert the upper second plug block 2421 into the slot 2345 on the first fixed block 2341, and the straight edge 243 abuts against the bottom of the inner cylinder 23. Use tools to unload the solid organic matter in the upper half of the inner cylinder 23, so that the solid organic matter falls on the unloading plate 24, moves it out, and pours it into the solid organic matter collection bucket. Then, re-install the unloading plate 24 according to the method just now, and slowly rotate the inner cylinder 23 so that the downward part turns upward to complete the unloading.

[0046] The sewage treatment device 100 for collecting solid organic matter provided by the present invention is, during operation, installed with a stainless steel filter in the filter cavity 236 of the inner cylinder, and the sewage containing solid organic matter is transported to the inner cylinder 23 of the solid collecting device 2 by the sewage inlet pipe 3, and is flushed on the annular connecting plate 2331 of the inner cylinder 23 through the curved pipe 32, and the driving device 41 drives the rotating shaft 21 to rotate through the belt 414, thereby driving the inner cylinder 23 to rotate, so that the sewage in the inner cylinder 23 generates centrifugal force, and the solid organic matter and water are separated by means of the stainless steel filter, that is, the solid organic matter remains in the inner cylinder, and the water flows into the outer shell 22 through the stainless steel filter, and the outflowing water flows into the sewage pool from the notch 225 of the outer shell 22, and the sewage not containing solid organic matter can be sent to the sewage pool while separating the solid organic matter, without the need for an additional conveying device to send the filtered sewage into the sewage pool. When the solid organic matter collected in the inner cylinder 23 reaches a certain amount, the sewage is stopped from being transported into the solid collecting device 2, the driving device 41 is turned off, and the solid organic matter collected in the inner cylinder 23 is unloaded with the help of the unloading plate 24 using the method described above, and then it can continue to be used.

[0047] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the scope of the present invention through the above description. The technical scope of this invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A sewage treatment device for collecting solid organic matter, comprising a sewage pool (1) and a solid collecting device (2) arranged on the sewage pool (1), and also comprising a sewage inlet pipe (3) for conveying sewage to be treated to the solid collecting device (2) and a driving device (41) for providing power to the solid collecting device (2), characterized in that: The solid collection device (2) comprises a rotating shaft (21), an outer shell (22) and an inner cylinder (23); the rotating shaft (21) is fixed at the center of the bottom surface of the inner cylinder (23); the rotating shaft (21) and the outer shell (22) are rotatably connected; the inner cylinder (23) comprises two layers; a filter screen cavity (236) is provided between the two layers; a stainless steel filter screen is installed in the filter screen cavity (236); a plurality of groups of annular openings are provided on the side wall of the inner cylinder (23); the annular openings are connected on the side wall of the inner cylinder (23) through a connecting plate (233); the sewage inlet pipe (3) comprises a straight pipe (31) and a curved pipe (32); the curved pipe (32) controls the water flow direction of the outflow to be consistent with the rotation direction of the inner cylinder (23), that is, the water outflow direction is along the rotation direction of the inner cylinder (23), and a certain power can be provided for the rotation of the inner cylinder (23).

2. The sewage treatment device for collecting solid organic matter according to claim 1, characterized in that: A plurality of support columns (11) are provided at the bottom of the sewage pool (1), and first crossbeams (12) and second crossbeams (13) are provided on the support columns (11) in different rows, respectively; a front support plate (121) is provided on the first crossbeam (12), and a rear support plate (131) is provided on the second crossbeam (13); the front support plate (121) and the rear support plate (131) are respectively provided with through holes at the top, and bearings are installed in the through holes; the rotating shaft (21) is rotatably connected to the front support plate (121) and the rear support plate (131) via the bearings.

3. The sewage treatment system for collecting solid organic matter according to claim 2, characterized in that: The outer shape of the shell (22) is a cylinder with an opening at one end, the opening is close to the front support plate (121), and the opening has an inward flange. A bearing seat (221) is provided at the bottom of the shell (22), and a bearing is installed in the bearing seat (221). The rotating shaft (21) passes through the bottom of the shell (22) from the bearing seat (221) and is rotatably fixed together by the bearing. A first belt pulley (211) is provided on the rotating shaft (21) between the back side of the bottom of the shell (22) and the rear support plate (131), and the first belt pulley (211) and the rotating shaft (21) are fixedly connected.

4. The sewage treatment device for collecting solid organic matter according to claim 3, characterized in that: The driving device (41) comprises a motor (411), an output shaft (412) arranged at the output end of the motor (411), and a second belt pulley (414) (413) arranged on the output shaft (412), wherein the second belt pulley (413) and the first belt pulley (211) are connected via a belt (414).

5. The sewage treatment device capable of collecting solid organic matter according to claim 4, characterized in that: The side wall of the outer shell (22) is provided with a notch (225) at the lowest point, and sewage flowing into the outer shell (22) can flow into the sewage pool (1) through the notch (225). Water retaining plates (222) are respectively provided along the axial sides of the notch (225).

6. The sewage treatment device capable of collecting solid organic matter according to claim 5, characterized in that: The inner cylinder (23) is in the shape of a cylinder with one end open. The inner cylinder (23) is fixedly connected to the rotating shaft (21) at the bottom. A first baffle plate (235) is provided on the side wall of the inner cylinder (23) to prevent sewage entering the inner cylinder (23) from flowing out from the opening.

7. The sewage treatment device capable of collecting solid organic matter according to claim 6, characterized in that: The connecting plate (233) is divided into an annular connecting plate (2331) along the annular direction and an axial connecting plate (2332) along the axial direction. The axial connecting plates (2332) are arranged in pairs, and each pair is arranged on the same diameter of the inner cylinder (23). The axial connecting plates (2332) are provided with fixing blocks (234). The axial connecting plate (2332) on one side is provided with a first fixing block (2341) and a second fixing block (2342), and the axial connecting plate (2332) on the other side is provided with a third fixing block (2343) and a fourth fixing block (2344). The connecting line of the first fixing block (2341) and the third fixing block (2343) is on one side of the rotating shaft (21), and the connecting line of the second fixing block (2342) and the fourth fixing block (2344) is on the other side of the rotating shaft (21).

8. The sewage treatment device capable of collecting solid organic matter according to claim 7, characterized in that: A skirt plate (2351) is arranged outside the first baffle plate (235), a water collecting box (237) is arranged below the skirt plate (2351), the water collecting box (237) is fixed to the front support plate (121) via a fixing member (2373), a water outlet pipe (2371) is arranged below the water collecting box (237), a water flow indicator (2372) is arranged in the water outlet pipe (2371), and the water flow indicator (2372) and the sewage inlet pipe (3) are electrically connected to the sewage pump for sewage.

9. The sewage treatment device capable of collecting solid organic matter according to claim 8, characterized in that: The fixed block (234) is provided with a trapezoidal slot (2345), the slot (2345) is in an inwardly expanding shape, and a matching baffle (2346) is installed in the slot (2345); the solid collecting device (2) also includes a discharge plate (24), the discharge plate (24) is L-shaped in shape, including a first plug block (241), a second plug block (242), a straight edge (243) and a second baffle plate (244), the first plug block (241) and the second plug block (242) are arranged opposite to each other, the first plug block (241) and the second plug block (242) can be simultaneously inserted into the fixed blocks (234) arranged opposite to each other on the same side of the rotating shaft (21), and the straight edge (243) can abut against the bottom surface of the inner cylinder (23).

10. The sewage treatment device capable of collecting solid organic matter according to claim 8, characterized in that: The slot (2345) on the fixed block (234) is arranged obliquely, the shape of the blocking bar (2346) matches the slot (2345), the first plug block (241) and the second plug block (242) of the unloading plate (24) are respectively arranged in a V shape, the first plug block (241) includes an upper first plug block (2411) and a lower first plug block (2412), the second plug block (242) includes an upper first plug block (2411) and a lower first plug block (2412), and the straight edge (243) divides the unloading plate (24) into upper and lower layers.

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