A sewage treatment equipment for environmental engineering

Abstract

The present invention relates to the field of microbial sewage treatment equipment, in particular to a sewage treatment equipment for environmental engineering, including a bacterial cultivation mechanism 1 and a bacterial cultivation mechanism 2; the basic structure of the bacterial cultivation mechanism 1 is a material cage, and a pair of floats 1 are fixedly arranged at the bottom of the material cage. The device can control the material cage to alternate between air and sewage by rotating the float 2, and can make the entire material cage completely float on the water surface and completely immersed in the water, so as to achieve complete and sufficient alternation of air and sewage; the device realizes energy recovery and utilization of the potential energy released by the high-level material cage through the rotating shaft linkage between the two material cages; the device uses a cylinder instead of a motor as a driving force source, and has the advantages of low power demand, light structural weight, and multiple devices sharing a set of air sources. The present invention is superior to the existing cage-type microbial sewage treatment equipment in terms of bacterial cultivation efficiency, microbial sewage treatment efficiency, energy consumption performance, cost control and maintenance performance.

Description

Technical Field

[0001] The invention relates to the field of microbial sewage treatment equipment, in particular to sewage treatment equipment for environmental engineering. Background Art

[0002] Microbial sewage treatment is to cultivate bacteria on objects with a large attachment area, and use the bacteria to decompose harmful substances in sewage. One of the common practices is to fill porous particles in a cage, place the cage in the sewage, and use an air pump for aeration and oxygen supply.

[0003] The above-mentioned microbial treatment equipment is affected by the packing density, and the aeration bubbles are difficult to enter the interior of the cage, which will cause waste of air pump power and reduce the efficiency of bacterial cultivation. Therefore, an improved version has emerged.

[0004] The patent with the publication number CN104891647A proposes a sewage treatment device that drives multiple cylindrical cages to rotate through a motor-driven bracket. During the rotation of the cage around the axis, it repeatedly rotates out of the water surface and returns to the underwater state, thereby realizing the alternation of air and sewage in the cage. The advantage of this device is that the structure is relatively simple, but the disadvantage of high power consumption is very obvious. When the cage moves underwater, the projected area of ​​the cage in the moving direction is the cross-sectional area of ​​the plane where its axis is located, and the cage wall is not smooth and smooth in order to be air-permeable and water-permeable, resulting in a high resistance to the movement of the cage underwater, and the device has multiple cages underwater at the same time. Therefore, in order to realize the operation of the device, even if a reduction mechanism is used, the power of the motor is required to be high. When the device is deployed in large numbers, the power consumption will be very high.

[0005] The patent with publication number CN118579930A proposes a device that uses the buoyancy of bubbles to indirectly drive the movement of a material cage. The air pump of this device does not directly aerate the material cage, but instead delivers air to the air collecting box at the bottom of the material cage. The air collecting box collects air and provides buoyancy for the material cage. Under the action of the air pump and the air collecting box, the material cages at both ends of the device alternately rise up into the air to complete the alternation of air and sewage. The advantage of this device is that it does not require a driving motor or a high-power air pump. The air pump only needs to supply air to the air collecting box, which greatly reduces the energy consumption of the equipment. However, the disadvantages of this device are also obvious. The air collecting box of this device opens vertically downward when collecting air and tilts when releasing air. It is only suitable for static water environment. In flowing sewage, the water flow easily impacts the air collecting box, resulting in the air collecting box being unable to complete air collection normally.

[0006] The above two microbial sewage treatment devices have a common shortcoming. According to the attached diagram of the equipment structure, after the cage floats up, the two devices are not completely separated from the sewage, and a small part remains in the sewage. The bacteria in this small part of the filler cannot obtain enough oxygen normally, which leads to reduced activity, and ultimately reduces the efficiency of the entire sewage treatment equipment.

[0007] Combining the advantages and disadvantages of existing microbial sewage treatment equipment technology, a sewage treatment equipment for environmental engineering is proposed. The sewage treatment equipment can realize the overall alternation of the material cage between sewage and air, and further optimize and reduce energy consumption. Summary of the invention

[0008] In view of the problems of low comprehensive performance of energy consumption, stability and microbial cultivation efficiency in the cage-type microbial sewage treatment equipment mentioned above or in the prior art, the present invention is proposed.

[0009] Therefore, the object of the present invention is to provide a sewage treatment equipment for environmental engineering.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions: a sewage treatment equipment for environmental engineering, comprising a bacteria cultivation mechanism 1 and a bacteria cultivation mechanism 2; the basic structure of the bacteria cultivation mechanism 1 is, including a material cage, a pair of buoys 1 are fixedly arranged at the bottom of the material cage, a pair of buoys 2 are rotatably connected to both sides of the material cage, four of the buoys 2 are symmetrically distributed about the material cage, the material cage 1 is penetrated by two rotating shafts along its width direction, and one buoy 2 is fixedly connected to each of the two ends of the rotating shaft, and the two rotating shafts on one side of the material cage are chain-driven; the bacteria cultivation mechanism 1 and the bacteria cultivation mechanism 2 have the same basic structure; the adjacent rotating shafts of the bacteria cultivation mechanism 1 and the bacteria cultivation mechanism 2 are connected with The transmission mechanism comprises a plum blossom telescopic sleeve, both ends of the plum blossom telescopic sleeve are coaxially fixedly connected with gear one, and the gear one is coaxially rotatably connected with a short shaft, the two short shafts are respectively rotatably connected with the rotating shafts in the bacteria cultivation mechanism one and the bacteria cultivation mechanism two, and the short shafts are arranged along the radial direction of the rotating shaft, and the rotating shaft in the bacteria cultivation mechanism one is coaxially fixedly sleeved with gear two, and the rotating shaft in the bacteria cultivation mechanism two is coaxially fixedly sleeved with gear three, and the gears two and three are respectively matched and meshed with their adjacent gear one; in the bacteria cultivation mechanism one, a cylinder is fixedly connected to the side of the material cage away from the chain transmission connection, and the piston rod of the cylinder is fixedly connected in parallel with a rack, and the rack matches and meshes with gear two.

[0011] As a preferred solution of the sewage treatment equipment for environmental engineering of the present invention, a pair of connecting rods are arranged at the end of the rotating shaft along its radial direction, the end of the connecting rod away from the rotating shaft is fixedly connected to the second float, and the connecting rod is connected to the two ends of the rectangular straight wall of the semicircular shell of the second float, and an isosceles triangle structure is formed between the two connecting rods and the second float.

[0012] As a preferred solution of the sewage treatment equipment for environmental engineering of the present invention, wherein: both sides of the material cage are fixedly connected with channel steels, and the rotating shaft is rotatably connected with the channel steels, the rotating shaft is located in the material cage, an isolation sleeve is sleeved between the channel steels, and both ends of the isolation sleeve are fixedly connected with the channel steels.

[0013] As a preferred solution of the sewage treatment equipment for environmental engineering of the present invention, a roller is rolled on the side of the rack away from the second gear, and the roller is rotatably connected to the channel steel.

[0014] As a preferred solution of the sewage treatment equipment for environmental engineering of the present invention, a circular groove is coaxially opened at one end of the gear one away from the plum blossom telescopic sleeve, one end of the short shaft is arranged in a ring shape, the annular inner wall of the short shaft is connected to the rotating shaft by a bearing, and the annular part of the short shaft is partially sleeved in the circular groove of gear one.

[0015] As a preferred solution of the sewage treatment equipment for environmental engineering of the present invention, the gear 2 and the gear 3 are distributed on both sides of the plum blossom telescopic sleeve.

[0016] As a preferred solution of the sewage treatment equipment for environmental engineering of the present invention, a balancing telescopic sleeve is arranged between the adjacent rotating shafts of the bacteria cultivation mechanism 1 and the bacteria cultivation mechanism 2, and the balancing telescopic sleeve and the plum blossom telescopic sleeve are respectively distributed on both sides of the material cage.

[0017] As a preferred solution of the sewage treatment equipment for environmental engineering of the present invention, the chain drive connection includes a sprocket arranged at the end of each rotating shaft, and a chain between the sprockets.

[0018] As a preferred solution of the sewage treatment equipment for environmental engineering of the present invention, the rotation angle difference between the buoy 2 of the bacteria cultivation mechanism 1 and the buoy 2 of the bacteria cultivation mechanism 2 is 180 degrees.

[0019] As a preferred solution of the sewage treatment equipment for environmental engineering of the present invention, the upper contour of the float one is arranged in an arc-shaped concave shape, and the upper and bottom of the float one are sealed and connected with a pot cover.

[0020] Beneficial effects of the environmental engineering sewage treatment equipment of the present invention:

[0021] The device can control the sinking and floating of the cage by rotating the second float, alternating between air and sewage, and can make the entire cage completely float on the water surface and completely immersed in the water, thereby realizing complete and sufficient exchange of air and sewage, and the rotational resistance of the second semicircular float in the sewage is small; the device realizes energy recovery and utilization of the potential energy released by the high-level cage through the rotating shaft linkage between the two cages; the device uses a cylinder instead of a motor as a driving force source, and has the advantages of low power demand, light structural weight and a common air source for multiple devices; the present invention is superior to existing cage-type microbial sewage treatment equipment in terms of bacterial cultivation efficiency, microbial sewage treatment efficiency, energy consumption performance, cost control and maintenance performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure of sewage treatment equipment used in environmental engineering.

[0024] Figure 2 This is a schematic diagram of the structure of sewage treatment equipment for environmental engineering after removing the mesh on the cage.

[0025] Figure 3 Wastewater treatment equipment for environmental engineering Figure 2 Schematic diagram of the bottom perspective structure.

[0026] Figure 4 This is a schematic diagram of the structure of sewage treatment equipment for environmental engineering after removing the cage.

[0027] Figure 5 This is a cross-sectional view of the plum blossom telescopic sleeve structure of sewage treatment equipment used in environmental engineering.

[0028] Figure 6 This is a schematic diagram of the assembly structure of the material cage, rotating shaft and isolation sleeve of sewage treatment equipment for environmental engineering.

[0029] Figure 7 This is a schematic diagram of the structure of a buoy of a sewage treatment equipment for environmental engineering.

[0030] In the figure: 100, bacterial culture mechanism 1; 200, bacterial culture mechanism 2; 300, material cage; 301, float 1; 302, float 2; 303, rotating shaft; 304, plum blossom telescopic sleeve; 305, gear 1; 306, short shaft; 307, gear 2; 308, gear 3; 309, cylinder; 310, rack; 311, connecting rod; 312, channel steel; 313, isolation sleeve; 314, roller; 315, balance telescopic sleeve; 316, sprocket; 317, chain; 301a, pot cover; 305a, circular groove. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] Example 1, reference Figure 1 to Figure 7 , which is the first embodiment of the present invention, and provides a sewage treatment equipment for environmental engineering, which can realize that the cage 300 as a whole alternates between sewage and air, and has low energy consumption, such as Figure 1 As shown, it includes a bacterial cultivation mechanism 100 and a bacterial cultivation mechanism 200; the basic structure of the bacterial cultivation mechanism 100 includes a material cage 300, a pair of buoys 1 301 are fixedly arranged at the bottom of the material cage 300, and a pair of buoys 2 302 are rotatably connected to both sides of the material cage 300, as shown in FIG. Figure 6 As shown, the cage 300 is provided with two rotating shafts 303 along its width direction, and the two ends of the rotating shaft 303 are respectively fixedly connected to a buoy 302. Figure 4 As shown, the two rotating shafts 303 located on one side of the cage 300 are connected by a chain drive, and the chain drive connection includes a sprocket 316 arranged at the end of each rotating shaft 303, and a chain 317 between the sprockets 316;

[0033] The above-mentioned bacterial cultivation mechanism 1 100 and the bacterial cultivation mechanism 2 200 have the same basic structure, and the rotation angle difference between the buoy 2 302 of the bacterial cultivation mechanism 1 100 and the buoy 2 200 is 180 degrees.

[0034] like Figure 4 and Figure 5As shown, a transmission mechanism is connected between adjacent rotating shafts 303 of the bacterial cultivation mechanism 100 and the bacterial cultivation mechanism 200, which includes a plum blossom telescopic sleeve 304, both ends of the plum blossom telescopic sleeve 304 are coaxially fixedly connected with a gear 1 305, and the gear 1 305 is coaxially rotatably connected with a short shaft 306, the two short shafts 306 are respectively rotatably connected to the rotating shafts 303 in the bacterial cultivation mechanism 100 and the bacterial cultivation mechanism 200, and the short shafts 306 are arranged along the radial direction of the rotating shaft 303, and the bacterial cultivation mechanism The rotating shaft 303 in the culture mechanism 100 is coaxially fixedly sleeved with the gear 2 307, and the rotating shaft 303 in the culture mechanism 200 is coaxially fixedly sleeved with the gear 3 308, and the gear 2 307 and the gear 3 308 are respectively matched and meshed with their adjacent gear 1 305; in the culture mechanism 100, the side of the material cage 300 away from the chain transmission connection is fixedly connected to the cylinder 309, and the piston rod of the cylinder 309 is parallelly fixedly connected to the rack 310, and the rack 310 is matched and meshed with the gear 2 307.

[0035] Specifically, Figure 6 As shown, both sides of the cage 300 are fixedly connected with channel steels 312, and the rotating shaft 303 is rotatably connected with the channel steels 312. The rotating shaft 303 is located in the cage 300, and an isolation sleeve 313 is sleeved between the channel steels 312, and both ends of the isolation sleeve 313 are fixedly connected with the channel steels 312.

[0036] like Figure 2 and Figure 5 As shown, a roller 314 is rolled on the side of the rack 310 away from the second gear 307, and the roller 314 is rotatably connected to the channel steel 312; a circular groove 305a is coaxially opened at one end of the gear 1 305 away from the plum blossom telescopic sleeve 304, one end of the short shaft 306 is arranged in an annular shape, the annular inner wall of the short shaft 306 is connected to the rotating shaft 303 by a bearing, and the annular part of the short shaft 306 is partially sleeved in the circular groove 305a of the gear 1 305, and the gear 2 307 and the gear 3 308 are distributed on both sides of the plum blossom telescopic sleeve 304;

[0037] like Figure 2 and Figure 4 As shown, a balancing telescopic sleeve 315 is provided between the adjacent rotating shafts 303 of the first culture mechanism 100 and the second culture mechanism 200 , and the balancing telescopic sleeve 315 and the plum blossom telescopic sleeve 304 are respectively distributed on both sides of the material cage 300 .

[0038] The principle and advantages of the device are further explained in combination with the existing technology: the float 301 of the existing cage-type microbial sewage treatment equipment is generally fixed together with the floating platform, and its floating height remains unchanged. The working modes of the bacteria culture cage are mainly divided into two types. One is that the bacteria culture cage is fixedly immersed in the sewage and aerated, and the other is that the bacteria culture cage moves back and forth between the air and the sewage. Taking the bacteria culture cage alternating between the air and the sewage as an example, it is mainly realized in the form of a rotating bacteria culture cage. However, the moving part of this type of equipment located underwater has high resistance, which brings about a large driving energy consumption.

[0039] The present invention mainly proposes a cage-type microbial sewage device, the main part of which is composed of two cages 300, each of which is equipped with a pair of floats 1 301 and two pairs of floats 2 302. The floats 1 301 are fixedly connected to the cage 300 to provide a fixed buoyancy to offset part of the gravity of the cage 300. The floats 2 302 can rotate on both sides of the cage 300. When the floats 2 302 rotate to the bottom of the cage 300, the buoyancy of the floats 1 301 and 302 overlaps. In addition, their combined buoyancy is greater than the dead weight of the cage 300, and the cage 300 is lifted out of the water as a whole. When the buoy 2 302 rotates to the upper part of the cage 300, the buoyancy of the buoy 1 301 and the buoy 2 302 is still superimposed to make the whole device floating, but it is the buoy 2 302 that floats on the water surface, and the height of the cage 300 is lower than the buoy 2 302. The cage 300 is immersed in sewage as a whole. Therefore, the present invention can control the cage 300 to alternate between air and sewage by rotating the buoy 2 302.

[0040] To achieve the above object, the present invention also has the following technical details:

[0041] like Figure 1 As shown, the device has two material cages 300. This is because when the second float 302 rotates from top to bottom, most of the second float 302 enters the water from the air, and the buoyancy of the second float 302 is related to its volume immersed in the water. Therefore, the resistance of the second float 302 rotating from the air into the water is large, and it is a gradually increasing process. The maximum value of the resistance will directly determine the lower limit of the driving force of the device, that is, the minimum power allowed by the power input, which will be directly related to the energy consumption of the equipment. Therefore, the number of material cages 300 is designed to be two in the device, and it is made The two material cages 300 snorkel alternately. When one of the material cages 300 floats to the surface, it actually stores gravitational potential energy, and the buoys 302 on both sides thereof also store buoyancy potential energy. Therefore, by linking the rotating shafts 303 of the two material cages 300, when the high-position material cage 300 sinks, the potential energy released is transferred to the material cage 300 that needs to float, which can effectively solve the power lower limit problem of the power source of the equipment, and can allow the power input power of the device to reach a very low lower limit value, thereby achieving energy saving of the overall equipment;

[0042] The device mainly realizes the linkage between the two material cages 300 through the plum blossom telescopic sleeve 304. Figure 2 As shown, the two rotating shafts 303 in each material cage 300 are rotated synchronously through a sprocket 316 and a chain 317, and then the two adjacent rotating shafts 303 of the two material cages 300 are linked by a plum blossom telescopic sleeve 304, refer to Figure 5 The petal-shaped profile of the plum blossom telescopic sleeve 304 enables it to be telescopic and can also be rotated to transmit torque. At both ends of the plum blossom telescopic sleeve 304, right-angle transmission is realized through bevel gears 305 and 307, and 305 and 308. However, unlike a general right-angle transmission box, the two ends of the plum blossom telescopic sleeve 304 can be deflected around the rotating shaft 303 through a short shaft 306, so that the two material cages 300 can realize the linkage of the rotating shaft 303 without affecting the floating and diving of a single material cage 300.

[0043] Therefore, different from the prior art, the device abandons the traditional motor drive and adopts a more suitable and lighter cylinder 309 drive, such as Figure 2 and Figure 5 As shown, the rack 310 is moved by the extension and retraction of the piston rod of the cylinder 309, and the rotating shaft 303 and the second buoy 302 are driven to rotate by the meshing of the rack 310 with the gear 2 307 (and under the limit protection of the roller 314). When the lower limit of the input power required by the equipment is the same, the self-weight of the cylinder 309 is much lower than that of the motor. Because in addition to the low self-weight of the cylinder 309 body, the compressed air source (compressor and air storage tank) of the cylinder 309 is on the shore, and the cylinder 309 and the air source only need to be connected through an air pipe, and a set of compressed air source can supply air to multiple devices. Considering that the required operating speed of the device is relatively slow (the cage 300 can alternately snorkel once or twice per minute), the power demand of the compressor of the compressed air source is also very low, and it has enough time to replenish the pressure to the air tank in a low-power state. The use of the cylinder 309 drive also avoids the safety risk of leakage of traditional motors in sewage.

[0044] The device is equipped with a balancing telescopic sleeve 315 at a symmetrical position of the material cage 300 and the plum blossom telescopic sleeve 304 , mainly to prevent the two material cages 300 from having a horizontal angle, so as to reduce the pressure of the plum blossom telescopic sleeve 304 .

[0045] In summary, the present invention has the advantages of low power demand, light structural weight, multiple devices sharing a set of gas sources and energy recovery, and thus has the advantages of low energy consumption, low cost and easy maintenance.

[0046] Example 2, reference Figure 5~Figure 7, which is the second embodiment of the present invention, is different from the previous embodiment in that this embodiment provides a buoy 1 301 and a buoy 2 302 of a sewage treatment equipment for environmental engineering, which includes, as Figure 7 As shown, the upper contour of the float 1 301 is arranged in an arc-shaped concave shape, and the upper and bottom of the float 1 301 are sealed and connected with a pot cover 301a; Figure 5 and Figure 6 As shown, a pair of connecting rods 311 are provided at the end of the rotating shaft 303 along its radial direction, and the end of the connecting rod 311 away from the rotating shaft 303 is fixedly connected to the second buoy 302, and the connecting rod 311 is connected to the two ends of the rectangular straight wall of the semicircular shell of the second buoy 302, and an isosceles triangle structure is formed between the two connecting rods 311 and the second buoy 302.

[0047] Since the devices are located on both sides of the cage 300 in different structures, there are differences in weight distribution, such as Figure 2 As shown, Figure 2 Taking the perspective as an example, the right side float 301 located on the upper left material cage 300 is installed slightly to the left side where it is heavier, and the float 301 can also be adjusted by loosening the lower lid 301a, and then loosening the upper lid 301a to exhaust air so that water can enter the float 301, so as to keep the two sides of the material cage 300 balanced.

[0048] The second float 302 of the device is designed to have a semicircular shape, and the axis of its arc wall is coaxial with the rotating shaft 303, which can reduce the rotation resistance of the second float 302 in sewage. In addition, the straight arm part of the second float 302 is also convenient for assembly with the connecting rod 311.

[0049] The rest of the structure is the same as that of Example 1.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A sewage treatment equipment for environmental engineering, characterized in that: It includes a culture unit 1 (100) and a culture unit 2 (200); The basic structure of the bacterial culture mechanism 1 (100) includes a material cage (300), a pair of buoys 1 (301) is fixedly arranged at the bottom of the material cage (300), and a pair of buoys 2 (302) are rotatably connected to both sides of the material cage (300), and the four buoys 2 (302) are symmetrically distributed about the material cage (300), and the material cage (300) is provided with two rotating shafts (303) penetrating along the width direction thereof, and the two ends of the rotating shafts (303) are respectively fixedly connected to a buoy 2 (302), and the two rotating shafts (303) located on one side of the material cage (300) are connected by a chain transmission; The basic structures of the bacterial cultivation mechanism 1 (100) and the bacterial cultivation mechanism 2 (200) are the same; A transmission mechanism is connected between adjacent rotating shafts (303) of the first bacterial cultivation mechanism (100) and the second bacterial cultivation mechanism (200), and includes a plum blossom telescopic sleeve (304). Both ends of the plum blossom telescopic sleeve (304) are coaxially fixedly connected to a gear first (305), and the gear first (305) is coaxially rotatably connected to a short shaft (306). The two short shafts (306) are respectively connected to the first bacterial cultivation mechanism (100) and the second bacterial cultivation mechanism (200). ) is rotatably connected to the rotating shaft (303) in the first bacteria cultivation mechanism (100), and the short shaft (306) is arranged along the radial direction of the rotating shaft (303), and the rotating shaft (303) in the first bacteria cultivation mechanism (100) is coaxially fixedly sleeved with a second gear (307), and the rotating shaft (303) in the second bacteria cultivation mechanism (200) is coaxially fixedly sleeved with a third gear (308), and the second gear (307) and the third gear (308) are respectively matched and meshed with their adjacent first gear (305); In the first bacterial culture mechanism (100), a cylinder (309) is fixedly connected to the side of the material cage (300) away from the chain transmission connection, and a rack (310) is fixedly connected to the piston rod of the cylinder (309) in parallel, and the rack (310) matches the meshing gear (307); A pair of connecting rods (311) are provided at the end of the rotating shaft (303) along its radial direction. The end of the connecting rod (311) away from the rotating shaft (303) is fixedly connected to the second buoy (302), and the connecting rod (311) is connected to the two ends of the rectangular straight wall of the semicircular shell of the second buoy (302). The two connecting rods (311) and the second buoy (302) form an isosceles triangle structure.

2. The sewage treatment equipment for environmental engineering according to claim 1, characterized in that: Channel steels (312) are fixedly connected to both sides of the cage (300), and the rotating shaft (303) is rotatably connected to the channel steel (312). The rotating shaft (303) is located in the cage (300), and an isolation sleeve (313) is sleeved between the channel steels (312), and both ends of the isolation sleeve (313) are fixedly connected to the channel steel (312).

3. The sewage treatment equipment for environmental engineering as claimed in claim 2, characterized in that: A roller (314) is rolled on the side of the rack (310) away from the second gear (307), and the roller (314) is rotatably connected to the channel steel (312).

4. The sewage treatment equipment for environmental engineering as claimed in claim 3, characterized in that: A circular groove (305a) is coaxially formed at one end of the gear one (305) away from the plum blossom telescopic sleeve (304); a section of the short shaft (306) is arranged in an annular shape; a bearing is connected between the annular inner wall of the short shaft (306) and the rotating shaft (303); and a portion of the annular portion of the short shaft (306) is partially sleeved in the circular groove (305a) of the gear one (305).

5. The sewage treatment equipment for environmental engineering as claimed in claim 4, characterized in that: The gear 2 (307) and the gear 3 (308) are distributed on both sides of the plum blossom telescopic sleeve (304).

6. The sewage treatment equipment for environmental engineering according to claim 1, characterized in that: A balancing telescopic sleeve (315) is provided between adjacent rotating shafts (303) of the first bacterial cultivation mechanism (100) and the second bacterial cultivation mechanism (200), and the balancing telescopic sleeve (315) and the plum blossom telescopic sleeve (304) are respectively distributed on both sides of the material cage (300).

7. The sewage treatment equipment for environmental engineering according to claim 6, characterized in that: The chain drive connection comprises a sprocket (316) arranged at the end of each rotating shaft (303), and a chain (317) between the sprockets (316).

8. The sewage treatment equipment for environmental engineering as claimed in claim 7, characterized in that: The rotation angle difference between the float 2 (302) of the bacteria cultivation mechanism 1 (100) and the float 2 (302) of the bacteria cultivation mechanism 2 (200) is 180 degrees.

9. The sewage treatment equipment for environmental engineering according to claim 1, characterized in that: The upper contour of the float one (301) is arranged in an arc-shaped inwardly concave shape, and the upper and bottom parts of the float one (301) are both sealedly connected to a pot cover (301a).

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