Sewage multi-stage treatment device and process

Abstract

The invention discloses a sewage multi-stage treatment device and process, and belongs to the technical field of sewage treatment.The sewage multi-stage treatment device comprises a filtering mechanism used for conducting preliminary filtration on sewage, a treatment mechanism used for conducting secondary treatment on the sewage is arranged on the filtering mechanism, and a temporary storage mechanism used for disinfecting and storing the sewage is arranged on the treatment mechanism; the filtering mechanism is used for filtering large impurities in sewage, automatically adding a flocculating agent and a conditioning agent into the sewage, automatically stirring and mixing the sewage, then filling high-pressure air into the sewage, and taking away condensed impurities in the sewage through small bubbles generated by stirring; the sewage is finally treated through a carbon plate and a sterilizing lamp, the automation degree is high, and the continuity is good; according to the filtering mechanism provided by the invention, insoluble impurities with different sizes in sewage are preliminarily removed through the two conveying belts with holes with different sizes, and the removal effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sewage multi-stage treatment device and process. Background Art

[0002] Sewage refers to water that has been polluted to a certain extent and has lost its original function; sewage is mixed with a large amount of organic matter, impurities and chemical substances; these sewage can neither be used directly nor discharged directly, and need to be treated to restore their original functions or be used for other functions. The multi-stage treatment of sewage can be generally divided into three levels, including: primary impurity treatment, secondary comprehensive treatment and tertiary disinfection treatment; the multi-stage sewage treatment device in the existing technology still requires manual intervention, and the operation and maintenance process is complicated, requiring specialized technicians to manage, and the degree of automation is low. Summary of the invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: a multi-stage sewage treatment device, comprising a filtering mechanism for preliminary filtering of sewage, the filtering mechanism comprising a filtering tank, a treatment mechanism for secondary treatment of sewage arranged on the filtering mechanism, the treatment mechanism comprising an aerosol tank, a temporary storage mechanism for disinfecting and storing sewage arranged on the treatment mechanism, the temporary storage mechanism comprising a treatment tank, and the treatment tank and the aerosol tank are fixedly installed; The filtering mechanism comprises a pipeline pump fixedly installed on the filtering pool, and the processing mechanism comprises an adding pool fixedly installed on the aerosol pool, and the adding pool and the pipeline pump are fixedly installed.

[0004] Furthermore, the filtering mechanism also includes a filtering motor fixedly installed next to the filtering pool, a motor wheel is fixedly installed on the motor shaft of the filtering motor, two upper transmission rollers are rotatably installed on the filtering pool, two inner transmission rollers are rotatably installed inside the filtering pool, conveyor belts are wrapped around the upper transmission rollers and the inner transmission rollers, transmission belts are wrapped around the upper transmission rollers and the motor wheel close to the filtering motor side, a transverse transmission belt is wrapped around the upper transmission roller close to the pipeline pump side, and synchronous transmission belts are wrapped around the two upper transmission rollers.

[0005] Furthermore, a plurality of conveying plates are fixedly installed on the two conveyor belts, a plurality of holes are arranged on the two conveyor belts, and the holes on the conveyor belt close to the filter motor side are larger than the holes on the conveyor belt close to the pipeline pump side, and two impurity grooves are arranged on the filter pool.

[0006] Sewage is passed into the filter tank, and the rotation of the filter motor drives the motor wheel to rotate, which drives the upper drive roller close to the filter motor side to rotate through the transmission belt, and drives the two upper drive rollers to rotate synchronously through the synchronous transmission belt. The upper drive roller close to the pipeline pump side drives the middle drive wheel to rotate through the transverse transmission belt, thereby driving the conveyor belt to move. The holes on the conveyor belt allow sewage to pass through, but will block insoluble impurities in the sewage. The impurities are transported to the impurity tank through two conveyor belts, and the filtered sewage is pumped into the addition tank through the pipeline pump.

[0007] Furthermore, the processing mechanism also includes a stirring motor fixedly installed on the addition tank, a motor gear is fixedly installed on the motor shaft of the stirring motor, two mixing blade shafts are rotatably installed in the addition tank, a mixing gear is fixedly installed on the mixing blade shaft, a transfer gear is rotatably installed on the addition tank, a vertical shaft is rotatably installed on the aerosol tank, an upper gear and a lower gear are fixedly installed on the vertical shaft, a mixing transmission belt is wound around the transfer gear, the motor gear and the two mixing gears, an external transmission belt is wound around the upper gear and the transfer gear, and an addition tank is arranged on the side of the addition tank.

[0008] Furthermore, a submersible pump is provided in the addition pool, a transmission pipe is fixedly installed on the addition pool, the transmission pipe is connected to the aerosol pool, a sliding column is slidably installed in the transmission pipe, a blocking plate is fixedly installed on the sliding column, a one-way spring is provided between the sliding column and the transmission pipe, an air compressor is provided next to the aerosol pool, a pressure pipe is fixedly installed on the output end of the air compressor, and the pressure pipe is connected to the transmission pipe.

[0009] Furthermore, three partitions are arranged in the aerosol pool, and the partition in the middle is the highest. Four bottom fan blades are rotatably installed at the bottom of the aerosol pool, and bottom gears are fixedly installed on the bottom fan blades. A bottom transmission belt is wrapped around the lower gear and the four bottom gears.

[0010] Furthermore, a middle transmission wheel is rotatably installed on the aerosol pool, and a transverse transmission belt is wrapped around the middle transmission wheel and the upper transmission roller close to the pipeline pump side. Two extraction rollers are rotatably installed on the aerosol pool, and a docking gear is fixedly installed on the extraction roller close to the middle transmission wheel side. The docking gear is meshed with the middle transmission wheel. Extraction belts are wrapped around the two extraction rollers, and an extraction plate is fixedly installed on the extraction belts. A slag discharge slope is provided on the aerosol pool.

[0011] The stirring motor drives the motor gear to rotate, which drives the mixing gear and the transfer gear to rotate through the mixing transmission belt, and the mixing gear drives the mixing blade shaft to rotate. The transfer gear drives the upper gear, the vertical shaft and the lower gear to rotate through the external transmission belt, and drives the four bottom gears to rotate through the bottom transmission belt, which drives the bottom fan blades to rotate. The rotation of the middle transmission wheel drives the docking gear and the pull-out roller to rotate, thereby driving the pull-out belt to rotate. After the filtered sewage enters the addition pool, the flocculant and the regulator are added to the addition pool through the addition tank. The sewage is fully mixed with the flocculant and the regulator through the rotation of the mixing blade shaft. The flocculant can condense the soluble impurities in the sewage into small pieces, and the regulator can adjust the pH value of the sewage. The sewage in the addition pool is pumped into the transmission pipe through a submersible pump. The barrier plate allows the sewage to pass only in one direction. At this time, the air compressor pumps high-pressure air into the transmission pipe through a pressure pipe to convert the sewage into aerosol water. The aerosol water then enters the aerosol tank and is stirred by the bottom fan blades to decompose the large bubbles in the sewage into small bubbles. The small bubbles float on the water surface with impurities, and finally the small bubbles and impurities are pushed out of the aerosol tank through the slag discharge slope by the push-out plate on the push-out belt, and then the sewage enters the treatment tank.

[0012] Furthermore, the temporary storage mechanism includes an inner pool arranged in the processing pool, a filter plate is arranged on the top of the inner pool, a plurality of one-way columns are slidably installed in the inner pool, a one-way plate is fixedly installed on the one-way column, a closing spring is arranged between the one-way column and the inner pool, a carbon plate is arranged in the processing pool, a plurality of ultraviolet lamps are arranged in the processing pool, a water storage tank is fixedly installed next to the processing pool, and a valve is arranged on the processing pool.

[0013] The one-way plate allows the sewage entering the inner tank from the addition tank to pass only from bottom to top. As the water level outside the inner tank rises, the carbon plate adsorbs the microorganisms in the water. Then the sewage enters the chamber where the ultraviolet lamp is located from the chamber where the inner tank is located. The sewage is fully irradiated and disinfected by the ultraviolet lamp. The valve can be opened to pass the treated sewage into the reservoir for temporary storage.

[0014] A multi-stage sewage treatment process, characterized in that it includes the following steps: 1. filtering large impurities in sewage; 2. coagulating soluble impurities in sewage by flocculants; 3. adjusting the pH value of sewage by regulators; 4. injecting air into sewage to convert sewage into aerosolized water; 5. stirring sewage to allow bubbles to carry away condensed impurities in sewage; 6. adsorbing microorganisms in sewage by carbon plates; 7. irradiating and disinfecting sewage.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) the filtering mechanism provided in the present invention automatically adds flocculants and regulators to the sewage after filtering large impurities in the sewage, and automatically stirs and mixes the sewage, and then fills the sewage with high-pressure air, and removes condensed impurities in the sewage through small bubbles generated by stirring, and then finally treats the sewage through carbon plates and disinfection lamps, with a high degree of automation and good continuity; (2) the filtering mechanism provided in the present invention preliminarily removes large and small insoluble impurities in the sewage through two conveyor belts with different hole sizes, and the removal effect is good; (3) the extraction belt provided in the present invention and the two conveyor belts move synchronously, and the bottom fan blades and the mixing blade shaft rotate synchronously, multiple actions are achieved through a small power source, and the control system is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the process flow of the present invention.

[0018] Figure 3 Schematic diagram of the filtering mechanism structure of the present invention Figure 1 .

[0019] Figure 4 Schematic diagram of the filtering mechanism structure of the present invention Figure 2 .

[0020] Figure 5 The processing mechanism structure of the present invention is shown in FIG. Figure 1 .

[0021] Figure 6 The processing mechanism structure of the present invention is shown in FIG. Figure 2 .

[0022] Figure 7 The processing mechanism structure of the present invention is shown in FIG. Figure 3 .

[0023] Figure 8 The processing mechanism structure of the present invention is shown in FIG. Figure 4 .

[0024] Fig. 9 The processing mechanism structure of the present invention is shown in FIG. Figure 5 .

[0025] Fig.10 The structure of the temporary storage mechanism of the present invention is shown in FIG. Figure 1 .

[0026] Fig.11 The structure of the temporary storage mechanism of the present invention is shown in FIG. Figure 2 .

[0027] Fig.12The structure of the temporary storage mechanism of the present invention is shown in FIG. Figure 3 .

[0028] Figure numbers: 101-filter tank; 102-filter motor; 103-motor wheel; 104-transmission belt; 105-pipeline pump; 106-transverse transmission belt; 107-upper transmission roller; 108-inner transmission roller; 109-conveyor belt; 110-conveyor plate; 111-impurity slot; 112-synchronous transmission belt; 201-addition tank; 202-aerosol tank; 203-stirring motor; 204-motor gear; 205-mixing gear; 206-mixing transmission belt; 207-transfer gear; 208-external transmission belt; 209-upper gear; 210-vertical shaft; 211-lower gear; 212-bottom transmission belt; 213 - bottom gear; 214- mixing impeller shaft; 215- bottom impeller; 216- middle transmission wheel; 217- docking gear; 218- ejection roller; 219- ejection belt; 220- ejection plate; 221- adding tank; 222- air compressor; 223- pressure pipe; 224- transmission pipe; 225- submersible pump; 226- partition; 227- slag discharge slope; 228- blocking plate; 229- sliding column; 230- one-way spring; 301- treatment tank; 302- water storage tank; 303- valve; 304- one-way plate; 305- closing spring; 306- one-way column; 307- inner tank; 308- carbon plate; 309- ultraviolet lamp. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] Example: Reference Figure 1-Figure 12 A multi-stage sewage treatment device includes a filtering mechanism for preliminary filtering of sewage, the filtering mechanism includes a filtering tank 101, a treatment mechanism for secondary treatment of sewage is arranged on the filtering mechanism, the treatment mechanism includes an aerosol tank 202, a temporary storage mechanism for disinfecting and storing sewage is arranged on the treatment mechanism, the temporary storage mechanism includes a treatment tank 301, and the treatment tank 301 is fixedly installed with the aerosol tank 202; The filtering mechanism includes a pipeline pump 105 fixedly installed on the filtering tank 101 , and the processing mechanism includes an addition tank 201 fixedly installed on the aerosol tank 202 . The addition tank 201 and the pipeline pump 105 are fixedly installed.

[0031] like Figure 3 , Figure 4As shown, the filtering mechanism also includes a filtering motor 102 fixedly installed next to the filtering tank 101, a motor wheel 103 is fixedly installed on the motor shaft of the filtering motor 102, two upper transmission rollers 107 are rotatably installed on the filtering tank 101, and two inner transmission rollers 108 are rotatably installed inside the filtering tank 101, and a conveyor belt 109 is wrapped around the upper transmission rollers 107 and the inner transmission rollers 108, a transmission belt 104 is wrapped around the upper transmission rollers 107 and the motor wheel 103 close to the filtering motor 102 side, a transverse transmission belt 106 is wrapped around the upper transmission rollers 107 close to the pipeline pump 105 side, and a synchronous transmission belt 112 is wrapped around the two upper transmission rollers 107.

[0032] like Figure 3 , Figure 4 As shown, a plurality of conveying plates 110 are fixedly installed on the two conveyor belts 109 , a plurality of holes are arranged on the two conveyor belts 109 , and the holes on the conveyor belt 109 close to the filter motor 102 are larger than the holes on the conveyor belt 109 close to the pipeline pump 105 , and two impurity grooves 111 are arranged on the filter pool 101 .

[0033] Sewage is introduced into the filter tank 101, and the rotation of the filter motor 102 drives the motor wheel 103 to rotate, and the upper transmission roller 107 close to the filter motor 102 is driven to rotate through the transmission belt 104, and the two upper transmission rollers 107 are driven to rotate synchronously through the synchronous transmission belt 112. The upper transmission roller 107 close to the pipeline pump 105 drives the middle transmission wheel 216 to rotate through the transverse transmission belt 106, thereby driving the conveyor belt 109 to move. The holes on the conveyor belt 109 allow sewage to pass through, but will block insoluble impurities in the sewage. The impurities are transported to the impurity tank 111 through the two conveyor belts 109, and the filtered sewage is pumped into the addition tank 201 through the pipeline pump 105.

[0034] like Figure 5-Figure 9 As shown, the processing mechanism also includes a stirring motor 203 fixedly mounted on the addition tank 201, a motor gear 204 is fixedly mounted on the motor shaft of the stirring motor 203, two mixing blade shafts 214 are rotatably mounted in the addition tank 201, a mixing gear 205 is fixedly mounted on the mixing blade shaft 214, a transfer gear 207 is rotatably mounted on the addition tank 201, a vertical shaft 210 is rotatably mounted on the aerosol tank 202, an upper gear 209 and a lower gear 211 are fixedly mounted on the vertical shaft 210, a mixing transmission belt 206 is wound around the transfer gear 207, the motor gear 204 and the two mixing gears 205, an external transmission belt 208 is wound around the upper gear 209 and the transfer gear 207, and an addition tank 221 is arranged on the side of the addition tank 201.

[0035] like Figure 5-Figure 9As shown, a submersible pump 225 is provided in the addition pool 201, a transmission pipe 224 is fixedly installed on the addition pool 201, the transmission pipe 224 is connected to the aerosol pool 202, a sliding column 229 is slidably installed in the transmission pipe 224, a blocking plate 228 is fixedly installed on the sliding column 229, a one-way spring 230 is provided between the sliding column 229 and the transmission pipe 224, an air compressor 222 is provided next to the aerosol pool 202, a pressure pipe 223 is fixedly installed on the output end of the air compressor 222, and the pressure pipe 223 is connected to the transmission pipe 224.

[0036] like Figure 5-Figure 9 As shown, three partitions 226 are arranged in the aerosol pool 202, and the partition 226 in the middle is the highest. Four bottom blades 215 are rotatably installed at the bottom of the aerosol pool 202, and a bottom gear 213 is fixedly installed on the bottom blade 215. A bottom transmission belt 212 is wound around the lower gear 211 and the four bottom gears 213.

[0037] like Figure 5-Figure 9 As shown, a middle transmission wheel 216 is rotatably installed on the aerosol pool 202, and a transverse transmission belt 106 is wrapped around the middle transmission wheel 216 and the upper transmission roller 107 close to the pipeline pump 105. Two extraction rollers 218 are rotatably installed on the aerosol pool 202, and a docking gear 217 is fixedly installed on the extraction roller 218 close to the middle transmission wheel 216. The docking gear 217 is meshed with the middle transmission wheel 216. Extraction belts 219 are wrapped around the two extraction rollers 218, and an extraction plate 220 is fixedly installed on the extraction belt 219. A slag discharge slope 227 is provided on the aerosol pool 202.

[0038] The stirring motor 203 drives the motor gear 204 to rotate, and drives the mixing gear 205 and the transfer gear 207 to rotate through the mixing transmission belt 206. The mixing gear 205 drives the mixing blade shaft 214 to rotate. The transfer gear 207 drives the upper gear 209, the vertical shaft 210 and the lower gear 211 to rotate through the external transmission belt 208, and drives the four bottom gears 213 to rotate through the bottom transmission belt 212, drives the bottom fan blade 215 to rotate, and the middle transmission wheel 216 rotates to drive the docking gear 217 and the extraction roller 218 to rotate, thereby driving the extraction belt 219 to rotate. After the filtered sewage enters the addition tank 201, the flocculant and the regulator are added to the addition tank 201 through the addition tank 221. Through the rotation of the mixing blade shaft 214, The sewage is fully mixed with the flocculant and the regulator. The flocculant can condense the soluble impurities in the sewage into small pieces, and the regulator can adjust the pH value of the sewage. The sewage in the addition tank 201 is pumped into the transmission pipe 224 through the submersible pump 225. The blocking plate 228 allows the sewage to pass only in one direction. At this time, the air compressor 222 pumps high-pressure air into the transmission pipe 224 through the pressure pipe 223 to convert the sewage into aerosol water. The aerosol water then enters the aerosol tank 202 and is stirred by the bottom fan blades 215 to decompose the large bubbles in the sewage into small bubbles. The small bubbles float on the water surface with impurities. Finally, the small bubbles and impurities are pushed out of the aerosol tank 202 through the slag discharge slope 227 by the push-out plate 220 on the push-out belt 219, and then the sewage enters the treatment tank 301.

[0039] like Figure 10-12 As shown, the temporary storage mechanism includes an inner pool 307 arranged in the processing pool 301, a filter plate is arranged on the top of the inner pool 307, a plurality of one-way columns 306 are slidably installed in the inner pool 307, a one-way plate 304 is fixedly installed on the one-way column 306, a closing spring 305 is arranged between the one-way column 306 and the inner pool 307, a carbon plate 308 is arranged in the processing pool 301, a plurality of ultraviolet lamps 309 are arranged in the processing pool 301, a water storage tank 302 is fixedly installed next to the processing pool 301, and a valve 303 is arranged on the processing pool 301.

[0040] The one-way plate 304 allows the sewage from the addition tank 201 to enter the inner tank 307 only to pass from bottom to top. As the water level outside the inner tank 307 rises, the carbon plate 308 adsorbs the microorganisms in the water. Then the sewage enters the chamber where the ultraviolet lamp 309 is located from the chamber where the inner tank 307 is located. The sewage is fully irradiated and disinfected by the ultraviolet lamp 309. The valve 303 is opened to pass the treated sewage into the water storage tank 302 for temporary storage.

[0041] like Figure 2As shown, a multi-stage sewage treatment process is characterized in that it includes the following steps: 1. filtering large impurities in sewage; 2. coagulating soluble impurities in sewage by flocculants; 3. adjusting the pH value of sewage by regulators; 4. injecting air into sewage to convert sewage into aerosolized water; 5. stirring sewage to allow bubbles to carry away condensed impurities in sewage; 6. adsorbing microorganisms in sewage by carbon plates; 7. irradiating and disinfecting sewage.

[0042] The working principle of a sewage multi-stage treatment device disclosed in the present invention is as follows: sewage is introduced into the filter tank 101, the filter motor 102 rotates to drive the motor wheel 103 to rotate, and the upper transmission roller 107 close to the filter motor 102 side is driven to rotate through the transmission belt 104, and the two upper transmission rollers 107 are driven to rotate synchronously through the synchronous transmission belt 112, and the upper transmission roller 107 close to the pipeline pump 105 side drives the middle transmission wheel 216 to rotate through the transverse transmission belt 106, thereby driving the conveyor belt 109 to move, the holes on the conveyor belt 109 allow sewage to pass through, but will block insoluble impurities in the sewage, and the impurities are transported to the impurity tank 111 through the two conveyor belts 109, and the filtered sewage is pumped into the addition tank 201 through the pipeline pump 105. The stirring motor 203 drives the motor gear 204 to rotate, and drives the mixing gear 205 and the transfer gear 207 to rotate through the mixing transmission belt 206. The mixing gear 205 drives the mixing blade shaft 214 to rotate. The transfer gear 207 drives the upper gear 209, the vertical shaft 210 and the lower gear 211 to rotate through the external transmission belt 208, and drives the four bottom gears 213 to rotate through the bottom transmission belt 212, drives the bottom fan blade 215 to rotate, and the middle transmission wheel 216 rotates to drive the docking gear 217 and the extraction roller 218 to rotate, thereby driving the extraction belt 219 to rotate. After the filtered sewage enters the addition tank 201, the flocculant and the regulator are added to the addition tank 201 through the addition tank 221. Through the rotation of the mixing blade shaft 214, The sewage is fully mixed with the flocculant and the regulator. The flocculant can condense the soluble impurities in the sewage into small pieces, and the regulator can adjust the pH value of the sewage. The sewage in the addition tank 201 is pumped into the transmission pipe 224 through the submersible pump 225. The blocking plate 228 allows the sewage to pass only in one direction. At this time, the air compressor 222 pumps high-pressure air into the transmission pipe 224 through the pressure pipe 223 to convert the sewage into aerosol water. The aerosol water then enters the aerosol tank 202 and is stirred by the bottom fan blades 215 to decompose the large bubbles in the sewage into small bubbles. The small bubbles float on the water surface with impurities. Finally, the small bubbles and impurities are pushed out of the aerosol tank 202 through the slag discharge slope 227 by the push-out plate 220 on the push-out belt 219, and then the sewage enters the treatment tank 301. The one-way plate 304 allows the sewage from the addition tank 201 to enter the inner tank 307 only to pass from bottom to top. As the water level outside the inner tank 307 rises, the carbon plate 308 adsorbs the microorganisms in the water. Then the sewage enters the chamber where the ultraviolet lamp 309 is located from the chamber where the inner tank 307 is located. The sewage is fully irradiated and disinfected by the ultraviolet lamp 309. The valve 303 is opened to pass the treated sewage into the water storage tank 302 for temporary storage.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-stage sewage treatment device, comprising a filtering mechanism for preliminary filtering of sewage, characterized in that: The filtering mechanism comprises a filtering pool (101), a treatment mechanism for performing secondary treatment on sewage is arranged on the filtering mechanism, the treatment mechanism comprises an aerosol pool (202), a temporary storage mechanism for disinfecting and storing sewage is arranged on the treatment mechanism, the temporary storage mechanism comprises a treatment pool (301), and the treatment pool (301) and the aerosol pool (202) are fixedly installed; The filtering mechanism comprises a pipeline pump (105) fixedly mounted on the filtering pool (101), and the processing mechanism comprises an addition pool (201) fixedly mounted on the aerosol pool (202), wherein the addition pool (201) and the pipeline pump (105) are fixedly mounted.

2. A multi-stage sewage treatment device according to claim 1, characterized in that: The filtering mechanism further comprises a filtering motor (102) fixedly mounted beside the filtering pool (101); a motor wheel (103) fixedly mounted on the motor shaft of the filtering motor (102); two upper transmission rollers (107) rotatably mounted on the filtering pool (101); two inner transmission rollers (108) rotatably mounted inside the filtering pool (101); a conveyor belt (109) is wound around the upper transmission rollers (107) and the inner transmission rollers (108); a transmission belt (104) is wound around the upper transmission rollers (107) and the motor wheel (103) near the filtering motor (102); a transverse transmission belt (106) is wound around the upper transmission rollers (107) near the pipeline pump (105); and a synchronous transmission belt (112) is wound around the two upper transmission rollers (107).

3. A multi-stage sewage treatment device according to claim 2, characterized in that: A plurality of conveying plates (110) are fixedly mounted on the two conveying belts (109), a plurality of holes are provided on the two conveying belts (109), and the holes on the conveying belt (109) close to the filter motor (102) are larger than the holes on the conveying belt (109) close to the pipeline pump (105), and two impurity grooves (111) are provided on the filter pool (101).

4. A multi-stage sewage treatment device according to claim 1, characterized in that: The treatment mechanism further comprises a stirring motor (203) fixedly mounted on the addition pool (201); a motor gear (204) is fixedly mounted on the motor shaft of the stirring motor (203); two mixing blade shafts (214) are rotatably mounted in the addition pool (201); a mixing gear (205) is fixedly mounted on the mixing blade shaft (214); a transfer gear (207) is rotatably mounted on the addition pool (201); a vertical shaft (210) is rotatably mounted on the aerosol pool (202); an upper gear (209) and a lower gear (211) are fixedly mounted on the vertical shaft (210); a mixing transmission belt (206) is wound around the transfer gear (207), the motor gear (204) and the two mixing gears (205); an external transmission belt (208) is wound around the upper gear (209) and the transfer gear (207); and an addition tank (221) is arranged on the side of the addition pool (201).

5. A multi-stage sewage treatment device according to claim 1, characterized in that: A submersible pump (225) is arranged in the addition pool (201), a transmission pipe (224) is fixedly installed on the addition pool (201), the transmission pipe (224) is connected to the aerosol pool (202), a sliding column (229) is slidably installed in the transmission pipe (224), a blocking plate (228) is fixedly installed on the sliding column (229), a one-way spring (230) is arranged between the sliding column (229) and the transmission pipe (224), an air compressor (222) is arranged next to the aerosol pool (202), a pressure pipe (223) is fixedly installed at the output end of the air compressor (222), and the pressure pipe (223) is connected to the transmission pipe (224).

6. A multi-stage sewage treatment device according to claim 4, characterized in that: Three partitions (226) are arranged in the aerosol pool (202), and the partition (226) located in the middle is the highest. Four bottom fan blades (215) are rotatably mounted at the bottom of the aerosol pool (202), and bottom gears (213) are fixedly mounted on the bottom fan blades (215). A bottom transmission belt (212) is wound around the bottom gear (211) and the four bottom gears (213).

7. A multi-stage sewage treatment device according to claim 2, characterized in that: A middle transmission wheel (216) is rotatably mounted on the aerosol pool (202); a transverse transmission belt (106) is wound around the middle transmission wheel (216) and an upper transmission roller (107) close to the pipeline pump (105); two ejection rollers (218) are rotatably mounted on the aerosol pool (202); a docking gear (217) is fixedly mounted on the ejection roller (218) close to the middle transmission wheel (216); the docking gear (217) is meshed with the middle transmission wheel (216); an ejection belt (219) is wound around the two ejection rollers (218); an ejection plate (220) is fixedly mounted on the ejection belt (219); and a slag discharge slope (227) is provided on the aerosol pool (202).

8. A multi-stage sewage treatment device according to claim 1, characterized in that: The temporary storage mechanism comprises an inner pool (307) arranged in a treatment pool (301), a filter plate is arranged on the top of the inner pool (307), a plurality of one-way columns (306) are slidably installed in the inner pool (307), a one-way plate (304) is fixedly installed on the one-way column (306), a closing spring (305) is arranged between the one-way column (306) and the inner pool (307), a carbon plate (308) is arranged in the treatment pool (301), a plurality of ultraviolet lamps (309) are arranged in the treatment pool (301), a water storage tank (302) is fixedly installed next to the treatment pool (301), and a valve (303) is arranged on the treatment pool (301).

9. A multi-stage sewage treatment process, characterized in that: The following steps are involved:

1. Filter large impurities in sewage; 2. Coagulate soluble impurities in sewage through flocculants; 3. Adjust the pH value of sewage through regulators; 4. Inject air into sewage to convert sewage into air-soluble water; 5. Stir sewage so that bubbles carry away condensed impurities in sewage; 6. Adsorb microorganisms in sewage through carbon plates; 7. Irradiate and disinfect sewage.

Images