Air floatation and precipitation integrated device for sewage treatment

Abstract

The utility model discloses an air floatation and precipitation integrated device for sewage treatment, which comprises a box body, an overflow groove is arranged on the upper portion of the box body, the overflow groove is connected with a clear water outlet, a deslagging mechanism is further arranged on the upper portion of the box body, an air compressor and a dissolved air tank are arranged on one side of the box body, the air compressor is connected with the dissolved air tank through a pipeline, and the dissolved air tank is connected with the overflow groove through a pipeline. A water inlet and a water outlet are formed in the dissolved air tank, the water outlet is connected with a water distributor, a chemical feeder is connected to a pipeline for connecting the water outlet with the water distributor, a mixed reaction barrel is arranged in the box body, the water distributor is arranged at the bottom of the mixed reaction barrel, an inclined plate filler layer is arranged on the periphery of the mixed reaction barrel, and the inclined plate filler layer is arranged in the mixed reaction barrel. A precipitation part is arranged at the bottom of the box body, is provided with a sludge discharge port and a sludge scraping mechanism, and is used for collecting and discharging precipitates. According to the utility model, air floatation and precipitation are combined into one device, so that the occupied area of the sewage treatment device is reduced, the space is saved, and the treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to an integrated air flotation and sedimentation device for sewage treatment. Background Art

[0002] Clean water is obtained by adding chemicals to sewage and then undergoing coagulation reaction. Currently, there are two types of sewage treatment using this principle: flotation machines and sedimentation tanks. Flotation machines target relatively small particles in sewage and use small bubbles to attach to flocs formed by adding chemicals, causing the flocs to float and achieve separation. Sedimentation tanks target relatively large particles in sewage and add chemicals to form flocs, which then use gravity to sink and achieve separation.

[0003] Underground coal mining requires the treatment of a large amount of cooling water. The underground cooling water contains impurities such as coal powder, lubricating oil, and emulsion. Currently, a flotation machine and a sedimentation tank are used to treat the cooling water in two steps. The two treatment equipments not only occupy a large area but also have low efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides an integrated air flotation and sedimentation device for sewage treatment.

[0005] The technical solution adopted by the utility model is: an integrated air flotation and sedimentation device for sewage treatment, comprising a box body, an overflow trough is arranged on the upper part of the box body, the overflow trough is connected to a clean water outlet, a slag discharge mechanism is also arranged on the upper part of the box body, an air compressor and an air dissolving tank are arranged on one side of the box body, the air compressor is connected to the air dissolving tank through a pipeline, the air dissolving tank is provided with a water inlet and a water outlet, the water outlet is connected to a water distributor, a doser is connected to the pipeline connecting the water outlet and the water distributor, a mixing reaction barrel is arranged inside the box body, the water distributor is arranged at the bottom of the mixing reaction barrel, an inclined plate packing layer is arranged on the periphery of the mixing reaction barrel, a sedimentation part is arranged at the bottom of the box body, the sedimentation part is provided with a mud discharge port and a mud scraping mechanism, and the sedimentation part is used to collect and discharge sediment;

[0006] Furthermore, the box body is set to be cylindrical, the bottom surface of the sedimentation part is a slope inclined toward the center, and the mud discharge port is set at the center of the bottom surface of the sedimentation part;

[0007] Furthermore, the slag discharge mechanism includes a motor, a scraper plate, and a slag collecting trough, wherein the motor is arranged above the box body, the motor is connected to a rotating shaft, the rotating shaft is coaxial with the box body, the rotating shaft is connected to the scraper plate, the slag collecting trough is arranged below the scraper plate, and the bottom of the slag collecting trough has a slope;

[0008] Furthermore, the scraping mechanism includes a scraping frame, on which a plurality of scraping plates are installed, which are arranged obliquely along the slope of the sedimentation part. The scraping frame is connected to the motor through a rotating shaft, and the rotating shaft is connected to the bottom of the mixing reaction barrel through a sealed bearing.

[0009] Furthermore, a pipeline mixer is connected to the pipeline between the dosing device and the gas dissolving tank.

[0010] The utility model adds the medicines needed for flotation and precipitation through the doser, and then enters the mixing reaction barrel through the water distributor, the particles in the sewage generate floccules in the mixing reaction barrel, move upward under the action of the bubbles and water flow in the barrel, the floccules of small particles float up through the attachment of small bubbles, the clean water overflows, the floating scum is discharged through the scum discharge mechanism, and the floccules of large particles fall to the inclined plate packing layer arranged on the outer periphery of the mixing reaction barrel after leaving the barrel, and then fall to the sedimentation part through the inclined plate packing layer, and reach the mud discharge port under the action of the mud scraping mechanism for discharge.

[0011] The utility model combines air flotation and sedimentation into one device, which reduces the floor space of the sewage treatment device, saves space and improves treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] Figure 2 It is a schematic diagram of the top view of the box structure of the utility model.

[0014] Figure 3 It is a schematic diagram of the position relationship of various components of the mud discharge mechanism of the utility model.

[0015] Figure 4 It is a schematic diagram of the structure of the mud scraping mechanism of the utility model.

[0016] Figure 5 It is a schematic diagram of the working process in the box of the utility model.

[0017] In the figure: 1. box body, 2. overflow trough, 3. slag discharge mechanism, 301. motor, 302. slag scraper, 303. slag collection trough, 304. rotating shaft, 4. air compressor, 5. air dissolving tank, 6. water distributor, 7. dosing device, 8. mixing reaction barrel, 9. inclined plate packing layer, 10. sedimentation part, 1001. mud discharge port, 11. mud scraper mechanism, 1101. mud scraper frame, 1102. mud scraper, 12. pipeline mixer. DETAILED DESCRIPTION

[0018] In order to more clearly understand the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0019] like Figure 1-Figure 5As shown, an integrated flotation and sedimentation device for sewage treatment includes a box body 1, an overflow trough 2 is arranged on the upper part of the box body 1, the overflow trough 2 is connected to a clean water outlet, a slag discharge mechanism 3 is also arranged on the upper part of the box body 1, an air compressor 4 and an air dissolving tank 5 are arranged on one side of the box body 1, the air compressor 4 is connected to the air dissolving tank 5 through a pipeline, the air dissolving tank 5 is provided with a water inlet and a water outlet, the water outlet is connected to a water distributor 6, a doser 7 is connected to the pipeline connecting the water outlet and the water distributor 6, a mixing reaction barrel 8 is arranged inside the box body 1, the water distributor 6 is arranged at the bottom of the mixing reaction barrel 8, an inclined plate packing layer 9 is arranged on the periphery of the mixing reaction barrel 8, and the bottom of the box body 1 A sedimentation section 10 is provided, and the sedimentation section 10 is provided with a mud discharge port 1001 and a mud scraping mechanism 11. The sedimentation section 10 is used to collect and discharge sediments. Sewage enters from the water inlet of the dissolved gas tank 5, and is mixed with the gas input from the air compressor 4 in the dissolved gas tank 5. The required agent is added to the dosing device 7. After mixing, the sewage enters the mixing reaction barrel 8 through the water distributor 6. Under the impact of water flow and buoyancy, the generated flocs move upward, and part of the flocs float to the water surface under the action of buoyancy and are discharged by the slag discharge mechanism 3. Part of the flocs fall down under the action of gravity, fall to the bottom through the inclined plate filler layer 9, and are discharged by the mud scraping mechanism 11.

[0020] Specifically, the box body 1 is set to be cylindrical, the bottom surface of the sedimentation part 10 is a slope inclined toward the center, and the mud discharge port 1001 is set at the center of the bottom surface of the sedimentation part 10;

[0021] Specifically, the slag discharge mechanism 3 includes a motor 301, a scraper plate 302, and a slag collecting trough 303. The motor 301 is arranged above the box body 1, the motor 301 is connected to the rotating shaft 304, the rotating shaft 304 is coaxial with the box body 1, the rotating shaft 304 is connected to the scraper plate 302, and the slag collecting trough 303 is arranged below the scraper plate 302. The bottom of the slag collecting trough 303 has a slope, and the notch of the slag collecting trough 303 is slightly higher than the liquid surface. The slag scraped by the scraper plate 302 falls into the slag collecting trough 303. Since the bottom of the slag collecting trough 303 has a slope, the slag will flow out of the slag collecting trough 303.

[0022] Specifically, the scraper mechanism 11 includes a scraper frame 1101, on which a plurality of scraper plates 1102 are installed which are arranged obliquely along the slope of the sedimentation part 10. The scraper frame 1101 is connected to the motor 301 through a rotating shaft 304, and the rotating shaft 304 is connected to the bottom of the mixing reaction barrel 8 through a sealed bearing. The sediment in the sedimentation part 10 is gradually moved toward the center of the sedimentation part 10 under the action of the plurality of obliquely arranged scraper plates 1102 until it reaches the mud discharge port 1001 for discharge.

[0023] Preferably, a pipeline mixer 12 is connected to the pipeline between the dosing device 7 and the gas dissolving tank 5, which is conducive to mixing the medicine, sewage and bubbles.

[0024] Working principle: the dosing device 7 adds the drugs needed for flotation and sedimentation, and then enters the mixing reaction barrel 8 through the water distributor 6. The particles in the sewage form flocs in the mixing reaction barrel 8, and move upward under the action of bubbles and water flow in the barrel. The flocs of small particles float up through the attachment of small bubbles, and the scum is discharged through the slag discharge mechanism 3, and the clean water overflows. After the large particles of flocs leave the barrel, they fall to the inclined plate packing layer 9 arranged on the outer periphery of the mixing reaction barrel 8, and then fall to the sedimentation part 10 through the inclined plate packing layer 9, and reach the mud discharge port 1001 for discharge under the action of the mud scraping mechanism 11.

[0025] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An integrated flotation and sedimentation device for sewage treatment, comprising a box, an overflow trough is provided on the upper part of the box, the overflow trough is connected to a clean water outlet, a slag discharge mechanism is also provided on the upper part of the box, an air compressor and an air dissolving tank are provided on one side of the box, the air compressor is connected to the air dissolving tank through a pipeline, the air dissolving tank is provided with a water inlet and a water outlet, the water outlet is connected to a water distributor, and a doser is connected to the pipeline connecting the water outlet and the water distributor, characterized in that: A mixing reaction barrel is arranged inside the box body, the water distributor is arranged at the bottom of the mixing reaction barrel, an inclined plate filling layer is arranged at the periphery of the mixing reaction barrel, a sedimentation part is arranged at the bottom of the box body, the sedimentation part is provided with a mud discharge port and a mud scraping mechanism, and the sedimentation part is used to collect and discharge sediment.

2. The integrated air flotation and sedimentation device for sewage treatment according to claim 1, characterized in that: The box body is arranged in a cylindrical shape, the bottom surface of the sedimentation portion is a slope surface inclined toward the center, and the mud discharge port is arranged at the center of the bottom surface of the sedimentation portion.

3. The integrated air flotation and sedimentation device for sewage treatment according to claim 2, characterized in that: The slag discharge mechanism includes a motor, a scraper plate, and a slag collecting trough. The motor is arranged above the box body, the motor is connected to a rotating shaft, the rotating shaft is coaxial with the box body, the rotating shaft is connected to the scraper plate, the slag collecting trough is arranged below the scraper plate, and the bottom of the slag collecting trough has a slope.

4. The integrated air flotation and sedimentation device for sewage treatment according to claim 3, characterized in that: The scraper mechanism comprises a scraper frame, on which a plurality of scraper plates inclined along the slope of the sedimentation part are mounted, the scraper frame is connected to the motor via a rotating shaft, and the rotating shaft is connected to the bottom of the mixing reaction barrel via a sealed bearing.

5. The integrated air flotation and sedimentation device for sewage treatment according to claim 1, characterized in that: A pipeline mixer is connected to the pipeline between the dosing device and the gas dissolving tank.

Images