Polyaluminum chloride flocculation and clarification equipment for sewage treatment

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to polyaluminum chloride flocculation and clarification equipment for sewage treatment, the polyaluminum chloride flocculation and clarification equipment for sewage treatment comprises a rack and a self-flowing wheel assembly, the rack is provided with a slow flow cavity, a first separation cavity, a second separation cavity, a crushing cavity, a dissolved air cavity and an air flotation cavity, a first water taking pipe and a first flocculation pipe are arranged above the first separation cavity, the second separation cavity is connected with the first water taking pipe, a second water taking pipe and a second flocculation pipe are arranged on the second separation cavity, the crushing cavity is connected with the first flocculation pipe, and a self-flowing wheel assembly and a three-flocculation pipe are arranged on the crushing cavity. The air dissolving cavity is connected with a second water taking pipe, the air floatation cavity is connected with a second flocculation pipe and a fourth flocculation pipe, and through the synergistic effect of ultrasonic breaking and microbubbles, impurities are stripped from floc, meanwhile, microbubble air dissolving water is sprayed to the surface of the depolymerized floc, inorganic particles, metal precipitates and other impurities are efficiently dissociated, and meanwhile the floc stably floats upwards.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sewage treatment, and particularly relates to a polyaluminum chloride flocculation and clarification equipment for sewage treatment. BACKGROUND

[0002] Polyaluminum chloride is widely used as a high-efficiency flocculant in the field of sewage treatment, which forms flocculation by the action of electric neutralization and adsorption bridging to realize solid-liquid separation in the treatment of municipal sewage and industrial wastewater. With the tightening of environmental protection policies and the increasing demand for resource recycling, the flocculation sediment also needs to be recycled. However, the sinking mixture produced by the traditional flocculation process is complex, including not only dense flocculation but also impurities such as inorganic particles and metal ions, and improving the purity of the flocculation product can significantly reduce the subsequent treatment cost and expand the recycling path.

[0003] The existing mainstream sewage treatment equipment and flocculation clarification equipment are mainly flotation tanks, inclined plate sedimentation tanks and high-efficiency clarifiers. The sinking flocculation mixture includes not only dense flocculation but also a large number of inorganic particles, metal hydroxide precipitates and unreacted PAC residues. These impurities are wrapped inside or attached to the surface of the dense flocculation, forming a solid mixture that is difficult to separate. Although the existing air flotation technology can float light flocculation, it is ineffective for dense flocculation and cannot separate inorganic particles and metal hydroxide precipitates wrapped inside or attached to the surface of dense flocculation. If it is directly recycled, it needs to be crushed, floated and other multiple processes, and the impurities significantly reduce the purity of the flocculation. If it is discarded, it will cause waste of PAC and secondary pollution risk.

[0004] Therefore, it is necessary to study a polyaluminum chloride flocculation and clarification equipment for sewage treatment, which can efficiently crush the sinking flocculation mixture and selectively wrap it with micro-bubbles, realize the floating separation of dense flocculation and realize the separation of dense flocculation and impurities. SUMMARY

[0005] In view of the above problems in the prior art, the application provides a polyaluminum chloride flocculation and clarification equipment for sewage treatment, which solves the problem that the impurities in the sinking flocculation mixture are wrapped inside or attached to the surface of the dense flocculation and are difficult to separate in the process of separating sewage and flocculation by the existing flocculation and clarification equipment.

[0006] In order to solve the above technical problems, the application adopts the following technical scheme:

[0007] A polyaluminum chloride flocculation and clarification equipment for sewage treatment, comprising: a rack and a self-flow wheel assembly.

[0008] The rack is provided with a buffer flow cavity, a first separation cavity, a second separation cavity, a crushing cavity, a dissolved gas cavity, a flotation cavity and a clean water cavity.

[0009] The lower end of the slow flow cavity is provided with a sewage pipe;

[0010] The first separation cavity is connected with the slow flow cavity, and a first water taking pipe is arranged above the first separation cavity, and a first flocculation pipe is arranged at the lower end of the first water taking pipe;

[0011] The second separation cavity is connected with the first water taking pipe, a second water taking pipe is arranged at the end of the second separation cavity away from the first water taking pipe, a second flocculation pipe is arranged below the second water taking pipe, and a baffle plate is arranged in the second separation cavity along the sewage flow direction, and the baffle plate is a same-wave baffle plate;

[0012] The breaking cavity is connected with the first flocculation pipe, a self-flow wheel assembly is rotatably arranged on the breaking cavity, and a third flocculation pipe is arranged at the end of the breaking cavity away from the first flocculation pipe;

[0013] The gas dissolving cavity is connected with the second water taking pipe, and the gas dissolving cavity is communicated with the self-flow wheel assembly;

[0014] The bottom of the air flotation cavity is connected with the second flocculation pipe and the fourth flocculation pipe, a third water taking pipe, a first sewage pipe and a second sewage pipe are further arranged on the air flotation cavity, the first sewage pipe is arranged at the bottom of the air flotation cavity, the second sewage pipe is arranged at the upper end of the air flotation cavity, and the air flotation cavity is connected with the clean water cavity through the third water taking pipe.

[0015] Further, a partition plate is arranged between the slow flow cavity and the first separation cavity, and the sewage in the slow flow cavity overflows to the first separation cavity after passing through the partition plate.

[0016] Further, an air compressor and an air distribution pipe are further arranged on the gas dissolving cavity, the air distribution pipe is arranged in the gas dissolving cavity, and the air distribution pipe is connected with the air compressor.

[0017] Further, the rack further comprises a mixing cavity, the mixing cavity is connected with the second flocculation pipe and the third flocculation pipe, a fourth flocculation pipe is arranged on the mixing cavity, and the fourth flocculation pipe is connected with the bottom of the air flotation cavity.

[0018] Further, the air flotation cavity further comprises a scraper assembly, the upper end of the air flotation cavity is connected with the second separation cavity, and the scraper assembly is installed on the air flotation cavity and the second separation cavity.

[0019] Further, the self-flow wheel assembly comprises a flexible shell and an impeller, the flexible shell is rotatably arranged on the side wall of the breaking cavity, the impeller is fixedly installed in the flexible shell, and a flexible filter screen is arranged on the flexible shell.

[0020] Further, the impeller comprises a dissolved air water pipe and a hollow mesh paddle, a cavity is arranged in the middle of the hollow mesh paddle, the hollow mesh paddle is fixedly arranged on the dissolved air water pipe, a connecting hole is arranged on the dissolved air water pipe, the dissolved air water pipe is connected with the cavity on the hollow mesh paddle through the connecting hole, and the top of the hollow mesh paddle is connected with the inner wall of the flexible shell.

[0021] Further, one end of the dissolved air water pipe is provided with a water inlet, and the other end is provided with a connecting end, the water inlet is arranged in the dissolved air cavity, and the connecting end extends to the outside of the rack.

[0022] Further, the self-flow wheel assembly further comprises a connecting rod and an ultrasonic transducer, the connecting end is rotationally connected with the connecting rod, and the ultrasonic transducer is fixedly connected to the connecting rod.

[0023] Further, the two ends of the dissolved air water pipe are connected with the flexible shell through flexible connecting pieces.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] 1. The polyaluminum chloride flocculation and clarification equipment for sewage treatment disclosed in the present application, through the synergistic effect of ultrasonic crushing and micro-bubble of the self-flow wheel assembly, the flexible shell with high-frequency vibration in the crushing cavity forces the impurities to be stripped from the floc, and at the same time, the micro-bubble dissolved air water is accurately sprayed to the surface of the depolymerized floc through the flexible filter screen on the self-flow wheel assembly, forming a selective wrapping layer. This process not only efficiently dissociates inorganic particles, metal precipitates and other impurities, but also converts the originally sinking dense floc into a micro-bubble carrier, realizing stable floating in the air flotation cavity. The purity of the finally separated floc is significantly improved, the impurities are settled to the bottom of the cavity and discharged independently, completely eliminating the problem of deterioration of the recovered product quality caused by impurity interference.

[0026] 2. The polyaluminum chloride flocculation and clarification equipment for sewage treatment disclosed in the present application, the self-flow wheel assembly simultaneously performs floc crushing and micro-bubbleization of dissolved air water, the crushing cavity directly outputs the floatable purified floc, and the air flotation cavity simultaneously realizes the collection of the floating floc, the discharge of the precipitated impurities and the recovery of the clean water through the density difference. The PAC reagent loss, floc structure damage and secondary pollution risk caused by multiple treatments are avoided from the source, and the operation complexity and resource recovery cost are greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure diagram of the present application Figure 1 ;

[0028] Figure 2 It is a structure diagram of the present application Figure 2 ;

[0029] Figure 3 It is a top view schematic diagram of the present application;

[0030] Figure 4 for Figure 3 sectional view along line A-A in Fig. 1;

[0031] Figure 5 for Figure 4 enlarged structural schematic view at D in Fig. 1;

[0032] Figure 6 for Figure 3 sectional view along line B-B in Fig. 1;

[0033] Figure 7 for Figure 3 sectional view along line C-C in Fig. 1;

[0034] Figure 8 structural schematic view of the self-flow wheel assembly;

[0035] Figure 9 structural schematic view of the impeller.

[0036] The reference signs involved in the drawings are as follows:

[0037] 1, frame; 11, slow flow cavity; 111, sewage pipe; 112, partition; 12, first separation cavity; 121, first water taking pipe; 122, first flocculation pipe; 13, second separation cavity; 131, baffle; 132, second water taking pipe; 133, second flocculation pipe; 14, crushing cavity; 141, third flocculation pipe; 15, dissolved air cavity; 151, air compressor; 152, air distribution pipe; 16, mixing cavity; 161, fourth flocculation pipe; 17, air floatation cavity; 171, third water taking pipe; 172, first sewage discharge pipe; 173, scraper assembly; 174, second sewage discharge pipe; 18, clean water cavity; 2, self-flow wheel assembly; 21, flexible shell; 211, flexible filter screen; 22, impeller; 221, dissolved air water pipe; 222, water inlet; 223, connecting end; 224, hollow mesh paddle; 23, connecting rod; 24, ultrasonic transducer. DETAILED DESCRIPTION

[0038] In order for those skilled in the art to have a better understanding of the present application, the technical solutions of the present application are further described below in combination with the drawings and examples.

[0039] In the description of the present application, it should be noted that for the orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0041] Please refer to Figures 1 to 8 As shown in the drawings, a polyaluminum chloride flocculation and clarification equipment for sewage treatment comprises a rack 1 for preliminary separation of flocs, air dissolving, and flotation, and a self-flow wheel assembly 2 for breaking dense flocs and wrapping micro-bubbles on the broken flocs.

[0042] The rack 1 is provided with a buffer flow cavity 11 for buffer flow, a first separation cavity 12 for preliminary separation of dense flocs and light flocs in sewage, a second separation cavity 13 for further separation of sewage containing light flocs, a breaking cavity 14 for breaking dense flocs and attaching micro-bubbles to them, an air dissolving cavity 15 for generating air-dissolved water by injecting gas into sewage, a flotation cavity 17 for flotation, and a clean water cavity 18 for containing clean water obtained after separation.

[0043] The lower end of the buffer flow cavity 11 is provided with a sewage pipe 111, through which sewage that has completed the coagulation and flocculation process enters the bottom of the buffer flow cavity 11. Specifically, a partition plate 112 is provided between the buffer flow cavity 11 and the first separation cavity 12, and the upper end of the partition plate 112 is located below the first water inlet pipe 121. Preferably, the upper end of the partition plate 112 is flush with the lower end of the first water inlet pipe 121. The sewage in the buffer flow cavity 11 overflows the partition plate 112 and enters the first separation cavity 12. It can be understood that the sewage that has completed the coagulation and flocculation process enters the bottom of the buffer flow cavity 11 through the sewage pipe 111, and the liquid level of the sewage in the buffer flow cavity 11 overflows the upper end of the partition plate 112 and enters the first separation cavity 12.

[0044] The first separation cavity 12 is connected with the slow flow cavity 11. The first separation cavity 12 is provided with a first water taking pipe 121 above. It is to be noted that the first water taking pipe 121 is uniformly provided with through holes with a large aperture. It can be understood that the light floc and part of the water can enter the first water taking pipe 121 through the first water taking pipe 121, and then enter the second separation cavity 13 through the first water taking pipe 121, while the dense floc cannot enter the first water taking pipe 121 through the through holes on the first water taking pipe 121. The lower end of the first water taking pipe 121 is provided with a first flocculation pipe 122, that is, the dense floc, part of the water and impurities wrapped in the dense floc and attached to the surface thereof enter the crushing cavity 14 through the first flocculation pipe 122.

[0045] The second separation cavity 13 is connected with the first water taking pipe 121. The second separation cavity 13 is provided with a second water taking pipe 132 at the end away from the first water taking pipe 121. It is to be noted that the second water taking pipe 132 is provided with through holes with a small aperture, only water can pass through, and the second water taking pipe 132 is provided with a second flocculation pipe 133 below. The second separation cavity 13 is provided with a baffle 131 along the flow direction of the sewage. The baffle 131 is a same-wave baffle. It is to be noted that the adjacent baffles form a curved flow channel, which reduces the flow rate of the sewage in the first separation cavity 12. The light floc and the water gradually separate during the flow process, the light floc is suspended at the water surface and moves to the side of the second separation cavity 13 away from the first water taking pipe 121. Part of the water after separation enters the second water taking pipe 132 through the through holes on the second water taking pipe 132, and then enters the dissolved gas cavity 15. The light floc and part of the water precipitated at the bottom of the second separation cavity 13 enter the second flocculation pipe 133.

[0046] The dissolved gas cavity 15 is connected with the second water taking pipe 132, and the dissolved gas cavity 15 is communicated with the self-flow wheel assembly 2. Specifically, the dissolved gas cavity 15 is further provided with an air compressor 151 and a gas distribution pipe 152. The gas distribution pipe 152 is arranged in the dissolved gas cavity 15, and the gas distribution pipe 152 is connected with the air compressor 151. That is, the water in the second water taking pipe 132 enters the dissolved gas cavity 15, and the air compressor 151 forms dissolved gas water by aeration into the water through the gas distribution pipe 152.

[0047] The crushing cavity 14 is connected with the first flocculation pipe 122, and the crushing cavity 14 is rotatably provided with the self-flow wheel assembly 2. That is, after the dense floc and the water enter the crushing cavity 14, the self-flow wheel assembly 2 is rotated, the self-flow wheel assembly 2 simultaneously performs ultrasonic crushing on the dense floc, breaks the structure of the dense floc, makes the impurities wrapped and attached to the surface thereof fall off and separate, and simultaneously sprays micro-bubble dissolved gas water to the crushed floc uniformly, so that the micro-bubbles uniformly wrap the crushed floc. It is to be noted that there is a gap between the flexible filter screen 211 and the hollow net-shaped paddle 224.

[0048] Specifically, the self-flow wheel assembly 2 comprises a flexible shell 21 and an impeller 22. The flexible shell 21 is rotationally arranged on the side wall of the crushing cavity 14, and the impeller 22 is fixedly installed in the flexible shell 21. The flexible shell 21 is provided with a flexible filter screen 211.

[0049] The impeller 22 comprises a dissolved air water pipe 221 and a hollow mesh paddle 224. The middle part of the hollow mesh paddle 224 is provided with a cavity. It should be noted that the side wall of the hollow mesh paddle 224 in this embodiment is a hard mesh structure as a whole. The dissolved air water can pass through the side wall of the hollow mesh paddle 224 from the cavity in the middle part of the hollow mesh paddle 224, enter the gap between the flexible filter screen 211 and the hollow mesh paddle 224, and then be uniformly sprayed onto the floc through the flexible filter screen 211.

[0050] The top of the hollow mesh paddle 224 is connected with the inner wall of the flexible shell 21. That is, when the impeller 22 vibrates at a high frequency under the action of the ultrasonic transducer 24, the flexible shell 21 can be driven to vibrate at a high frequency as a whole through the connection between the top of the hollow mesh paddle 224 and the inner wall of the flexible shell 21. When the flexible shell 21 contacts with the dense floc, the dense floc can be crushed, so that its structure is loosened, and the impurities wrapped or adhered to the surface of the dense floc are separated from the dense floc. It should be noted that the flexible shell 21 and the flexible filter screen 211 are made of rubber, silicone or the like. The vibration energy transmission will be significantly attenuated, the amplitude and frequency will be reduced, and the floc will be prevented from being excessively depolymerized.

[0051] The hollow mesh paddle 224 is fixedly arranged on the dissolved air water pipe 221. The dissolved air water pipe 221 is provided with a connecting hole, and the dissolved air water pipe 221 is connected with the cavity in the hollow mesh paddle 224 through the connecting hole. One end of the dissolved air water pipe 221 is provided with a water inlet 222, and the other end is provided with a connecting end 223. The water inlet 222 is arranged in the dissolved air cavity 15, and the connecting end 223 extends to the outside of the rack 1. It can be understood that the dissolved air water generated in the air flotation cavity 17 enters the dissolved air water pipe 221 through the water inlet 222, and then enters the cavity in the middle part of the hollow mesh paddle 224 through the connecting hole in the dissolved air water pipe 221.

[0052] The self-flow wheel assembly 2 further comprises a connecting rod 23 and an ultrasonic transducer 24. The connecting end 223 is rotationally connected with the connecting rod 23, and the ultrasonic transducer 24 is fixedly connected with the connecting rod 23. It can be understood that under the action of the ultrasonic transducer 24, the bubbles in the dissolved air water in the cavity of the hollow mesh paddle 224 and through the mesh structure of the side wall of the hollow mesh paddle 224, especially when passing through the mesh structure of the side wall of the hollow mesh paddle 224, rapidly oscillate, are broken into micro-bubbles, and the energy released when the bubbles collapse forces the gas to be more efficiently dissolved and re-nucleated to form fine bubbles.

[0053] Specifically, the gas dissolving water pipe 221 is connected with the flexible shell 21 through flexible connectors at both ends.

[0054] It should be noted that the flexible connectors can also prevent the gas dissolving water in the gas dissolving cavity 15 from directly entering the gap between the flexible filter screen 211 and the hollow net-shaped paddle 224 through the gap between the flexible shell 21 and the gas dissolving water pipe 221 at the air flotation cavity 17, and can prevent the gas dissolving water in the gap between the flexible filter screen 211 and the hollow net-shaped paddle 224 from leaking out of the equipment through the gap between the flexible shell 21 and the gas dissolving water pipe 221 at the connecting end 223.

[0055] The broken cavity 14 is provided with a third flocculation pipe 141 away from one end of the first flocculation pipe 122.

[0056] The bottom of the air flotation cavity 17 is connected with the second flocculation pipe 133 and the fourth flocculation pipe 161. Specifically, the rack 1 further comprises a mixing cavity 16, the mixing cavity 16 is connected with the second flocculation pipe 133 and the third flocculation pipe 141, the fourth flocculation pipe 161 is arranged on the mixing cavity 16, and the fourth flocculation pipe 161 is connected with the bottom of the air flotation cavity 17. That is, the light flocs at the bottom of the second separation cavity 13 and the flocs wrapped with micro-bubbles after being broken are mixed in the mixing cavity 16, and after further attaching micro-bubbles, the flocs enter the bottom of the air flotation cavity 17 through the fourth flocculation pipe 161.

[0057] The air flotation cavity 17 is further provided with a third water taking pipe 171, a first sewage pipe 172 and a second sewage pipe 174, the first sewage pipe 172 is arranged at the bottom of the air flotation cavity 17, the second sewage pipe 174 is arranged at the upper end of the air flotation cavity 17, and the air flotation cavity 17 is connected with the clean water cavity 18 through the third water taking pipe 171. It should be noted that the third water taking pipe 171 is provided with through holes with small hole diameters, and only water can pass through.

[0058] The air flotation cavity 17 further comprises a scraper assembly 173, the air flotation cavity 17 and the upper end of the second separation cavity 13 are connected, and the scraper assembly 173 is installed on the air flotation cavity 17 and the second separation cavity 13.

[0059] It can be understood that the flocs float to the water surface, the flocs floating on the water surface in the second separation cavity 13 and the air flotation cavity 17 are scraped to the second sewage pipe 174 by the scraper assembly 173 and discharged out of the equipment, the treated water enters the clean water cavity 18 through the third water taking pipe 171, and the inorganic particles, metal hydroxide precipitates and other impurities are precipitated to the bottom of the air flotation cavity 17 and discharged out of the equipment by the first sewage pipe 172.

[0060] The working principle of the present application is as follows:

[0061] The sewage which has completed coagulation and flocculation process enters the bottom of the slow flow cavity 11 through the sewage pipe 111, and the liquid level of the sewage in the slow flow cavity 11 exceeds the upper end of the partition plate 112 and then overflows into the first separation cavity 12.

[0062] In the first separation cavity 12, the light flocs and part of the water can enter the first water taking pipe 121 through the through hole on the first water taking pipe 121, and then enter the second separation cavity 13 through the first water taking pipe 121; the dense flocs, part of the water and the impurities wrapped in the dense flocs and attached to the surface thereof enter the breaking cavity 14 through the first flocculation pipe 122.

[0063] In the second separation cavity 13, the curved flow channels are formed between the adjacent folded plates, the flow rate of the sewage in the first separation cavity 12 is reduced, the light flocs and the water are gradually separated in the process of flowing, the light flocs are suspended at the water surface and move to the side of the second separation cavity 13 away from the first water taking pipe 121; the light flocs and part of the water precipitated at the bottom of the second separation cavity 13 enter the second flocculation pipe 133; at the same time, the water in the second separation cavity 13 enters the dissolved air cavity 15 through the second water taking pipe 132.

[0064] In the dissolved air cavity 15, the air compressor 151 forms the dissolved air water by aeration into the water through the air distribution pipe 152; the dissolved air water enters the dissolved air water pipe 221 through the water inlet 222, and then enters the cavity in the middle of the hollow net-shaped paddle 224 through the connecting hole on the dissolved air water pipe 221; under the action of the ultrasonic transducer 24, the bubbles in the dissolved air water oscillate rapidly when passing through the cavity in the hollow net-shaped paddle 224 and the net-shaped structure on the side wall of the hollow net-shaped paddle 224, especially when passing through the net-shaped structure on the side wall of the hollow net-shaped paddle 224, and the energy released when the bubbles collapse forces the gas to be more efficiently dissolved and re-nucleated to form fine bubbles; after the micro-bubble dissolved air water enters the gap between the flexible filter screen 211 and the hollow net-shaped paddle 224, it is uniformly sprayed onto the flocs through the flexible filter screen 211.

[0065] After the dense flocs and the water enter the breaking cavity 14, the self-flow wheel assembly 2 is rotated; the self-flow wheel assembly 2 performs ultrasonic breaking on the dense flocs, separates the impurities wrapped in the dense flocs and attached to the surface thereof from the dense flocs at the same time, and uniformly sprays the micro-bubble dissolved air water to the broken flocs, so that the micro-bubbles uniformly wrap the broken flocs.

[0066] In the mixing cavity 16, the light flocs at the bottom of the second separation cavity 13 and the flocs wrapped with micro-bubbles after breaking are mixed in the mixing cavity 16, and after further attaching the micro-bubbles, they enter the bottom of the air flotation cavity 17 through the fourth flocculation pipe 161.

[0067] In the mixing chamber 16, the flocs float to the water surface, and the flocs floating on the water surface in the second separation chamber 13 and the air floatation chamber 17 are scraped by the scraper assembly 173 to the second blowdown pipe 174 to discharge the equipment, and the treated water enters the clean water chamber 18 through the third water taking pipe 171, and the inorganic particles, metal hydroxide precipitates and other impurities are precipitated to the bottom of the air floatation chamber 17 and discharged from the equipment through the first blowdown pipe 172.

[0068] The above is only an embodiment of the present application, and the common knowledge of specific structures and characteristics in the scheme is not described in detail. The ordinary skilled person in the art knows all the ordinary technical knowledge in the field of the present application before the filing date or the priority date, can know all the prior art in the field, and has the ability to apply conventional experimental means before that date. The ordinary skilled person in the art can perfect and implement the present scheme based on the disclosure given in the present application, and some typical known structures or known methods should not be an obstacle to the implementation of the present application by the ordinary skilled person in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered within the scope of protection of the present application, and these will not affect the effect and practicality of the patent.

Claims

1. A polyaluminum chloride flocculation and clarification device for wastewater treatment, characterized in that, include: Frame (1) and self-flowing wheel assembly (2); The frame (1) is provided with a slow flow chamber (11), a first separation chamber (12), a second separation chamber (13), a crushing chamber (14), a dissolved air chamber (15), an air flotation chamber (17) and a water purification chamber (18); A sewage pipe (111) is provided at the lower end of the slow-flow chamber (11); The first separation chamber (12) is connected to the slow flow chamber (11). A first water intake pipe (121) is provided above the first separation chamber (12), and a first flocculation pipe (122) is provided at the lower end of the first water intake pipe (121). The second separation chamber (13) is connected to the first water intake pipe (121). A second water intake pipe (132) is provided at the end of the second separation chamber (13) away from the first water intake pipe (121). A second flocculation pipe (133) is provided below the second water intake pipe (132). A baffle (131) is provided in the second separation chamber (13) along the sewage flow direction. The baffle (131) is a corrugated baffle. The crushing chamber (14) is connected to the first flocculation pipe (122), and a self-flowing wheel assembly (2) is rotatably arranged on the crushing chamber (14). A third flocculation pipe (141) is arranged at the end of the crushing chamber (14) away from the first flocculation pipe (122). The dissolved air chamber (15) is connected to the second water intake pipe (132), and the dissolved air chamber (15) is connected to the self-flowing wheel assembly (2); The bottom of the flotation chamber (17) is connected to the second flocculation pipe (133) and the fourth flocculation pipe (161). The flotation chamber (17) is also provided with a third water intake pipe (171), a first sewage discharge pipe (172) and a second sewage discharge pipe (174). The first sewage discharge pipe (172) is located at the bottom of the flotation chamber (17), and the second sewage discharge pipe (174) is located at the upper end of the flotation chamber (17). The flotation chamber (17) is connected to the water purification chamber (18) through the third water intake pipe (171).

2. The polyaluminum chloride flocculation and clarification equipment for wastewater treatment according to claim 1, characterized in that: A partition (112) is provided between the slow-flow chamber (11) and the first separation chamber (12). The sewage in the slow-flow chamber (11) overflows into the first separation chamber (12) after passing over the partition (112).

3. The polyaluminum chloride flocculation and clarification equipment for wastewater treatment according to claim 1, characterized in that: An air compressor (151) and an air distribution pipe (152) are also provided on the dissolved gas chamber (15). The air distribution pipe (152) is located in the dissolved gas chamber (15) and is connected to the air compressor (151).

4. The polyaluminum chloride flocculation and clarification equipment for wastewater treatment according to claim 1, characterized in that: The frame (1) also includes a mixing chamber (16), which is connected to the second flocculation pipe (133) and the third flocculation pipe (141). A fourth flocculation pipe (161) is provided on the mixing chamber (16), which is connected to the bottom of the flotation chamber (17).

5. The polyaluminum chloride flocculation and clarification equipment for wastewater treatment according to claim 1, characterized in that: The air flotation chamber (17) further includes a scraper assembly (173), which is connected to the upper end of the air flotation chamber (17) and the second separation chamber (13). The scraper assembly (173) is installed on the air flotation chamber (17) and the second separation chamber (13).

6. The polyaluminum chloride flocculation and clarification equipment for wastewater treatment according to claim 1, characterized in that: The self-flowing wheel assembly (2) includes a flexible housing (21) and an impeller (22). The flexible housing (21) is rotatably mounted on the side wall of the crushing chamber (14). The impeller (22) is fixedly installed in the flexible housing (21). A flexible filter screen (211) is provided on the flexible housing (21).

7. A polyaluminum chloride flocculation and clarification device for wastewater treatment according to claim 6, characterized in that: The impeller (22) includes a dissolved air water pipe (221) and a hollow mesh blade (224). The hollow mesh blade (224) has a cavity in the middle. The hollow mesh blade (224) is fixedly mounted on the dissolved air water pipe (221). The dissolved air water pipe (221) has a connection hole. The dissolved air water pipe (221) is connected to the cavity on the hollow mesh blade (224) through the connection hole. The top of the hollow mesh blade (224) is connected to the inner wall of the flexible shell (21).

8. A polyaluminum chloride flocculation and clarification device for wastewater treatment according to claim 7, characterized in that: The dissolved air water pipe (221) has an inlet (222) at one end and a connecting end (223) at the other end. The inlet (222) is located in the dissolved air chamber (15), and the connecting end (223) extends to the outside of the frame (1).

9. A polyaluminum chloride flocculation and clarification device for wastewater treatment according to claim 8, characterized in that: The self-flowing wheel assembly (2) also includes a connecting rod (23) and an ultrasonic transducer (24). The connecting end (223) is rotatably connected to the connecting rod (23), and the ultrasonic transducer (24) is fixedly connected to the connecting rod (23).

10. A polyaluminum chloride flocculation and clarification device for wastewater treatment according to claim 9, characterized in that: The dissolved air water pipe (221) is connected to the flexible shell (21) at both ends by flexible connectors.

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