A dissolved air flotation machine

Abstract

The application belongs to the technical field of air floaters, and particularly relates to a dissolved air floatation machine, which comprises a main box body, a medicine mixing mechanism, a gas dissolving tank, a water feeding pipe, a pump gas pipe, a water pump, a water return pipe, a shovel groove and a slag suction pipe. The medicine mixing mechanism is installed at the lower left part of the chamber of the main box body, the gas dissolving tank is installed outside the main box body, the input end of the water feeding pipe is inserted into the inside of the gas dissolving tank, the output end of the water feeding pipe is connected with the pump gas pipe, the pump gas pipe is installed at the bottom of the gas mixing area, the water suction pipe of the water pump is inserted into the middle part of the sedimentation area, the input end of the water return pipe is connected with one water outlet of the water pump, the output end of the water return pipe is inserted into the inside of the gas dissolving tank, the shovel groove is movably installed at the upper part of the chamber of the main box body, the left end of the shovel groove is inserted into the air floatation layer, the slag suction pipe is installed on the main box body, and the input end of the slag suction pipe is inserted between the shovel groove and the top wall of the main box body. The floating slag is gathered and shovelled out, so that the floating slag is prevented from being scattered and sinking, and the floating slag removal efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air floaters, and particularly relates to a dissolved air floatation machine. BACKGROUND

[0002] The air floater is a water treatment device for realizing solid-liquid separation by using the principle of buoyancy, in which a dissolved air system generates a large number of micro-fine air bubbles in water, so that air is attached to suspended particles in the form of highly dispersed micro-bubbles, resulting in a state of density less than water.

[0003] In the prior art, a dissolved air floatation machine with high dissolved air efficiency is disclosed in Chinese Patent No. CN117843068B, which comprises a box body, the box body is open on one side, baffles and inclined plates are fixed on the inner wall of the box body, and the inside of the box body is sequentially divided into a dosing area, an air floatation area and a separation area; a separation plate is arranged in the air floatation area, and a plurality of penetrating holes are arranged on the separation plate. The dissolved air floatation machine can preliminarily separate relatively heavy and large suspended matters in sewage by using the separation plate under the premise of not increasing the area of the air floatation machine, and the accumulated sludge is directly pumped out, so that the particle size and content of the suspended matters on the upper side of the separation plate are reduced, the air floatation workload is reduced, the water flow velocity can be increased, the suspended matters that cannot float up in time are not washed away by too fast water flow, the water flow velocity and the dissolved air efficiency can be simultaneously improved, and the efficiency of sewage suspended matter separation is greatly improved.

[0004] However, the above-mentioned prior art uses a recyclable movable scraper to scrape and send the accumulated floating dregs to the collection tank, and the accumulated floating dregs are easily scattered by the scraper during the scraping and sending process, so that the floating dregs are separated from the air bubbles and sink, thereby reducing the floating dregs removal efficiency. SUMMARY

[0005] To solve the above-mentioned technical problems, the application provides a dissolved air floatation machine which can shovel and discharge the accumulated floating dregs, so as to avoid the sinking of the accumulated floating dregs due to scattering, and improve the floating dregs removal efficiency.

[0006] The dissolved air floatation machine comprises a main box body, a cavity is arranged in the main box body; a medicine mixing mechanism, a gas dissolving tank, a water feeding pipe, a pump gas pipe, a water pump, a water return pipe, a shovel groove and a dregs suction pipe are further arranged in the main box body.

[0007] The mixing mechanism is installed at the lower left part of the chamber of the main box, and the space above the mixing mechanism is a gas mixing area, and the upper part of the gas mixing area is a gas floating layer; the mixing mechanism is used for mixing the wastewater with the flocculant and the coagulant to form a mixed liquid, and the mixed liquid is delivered to the gas mixing area; the space right to the mixing mechanism is a sedimentation area; the gas dissolving tank is installed outside the main box, and the gas dissolving tank is used for mixing the clean water with the high-pressure air to form the gas dissolved water; the input end of the water delivery pipe extends into the interior of the gas dissolving tank; the output end of the water delivery pipe is installed with the air pumping pipe; the air pumping pipe is installed at the bottom of the gas mixing area; the water pump is installed at the right part of the main box; the water pumping pipe of the water pump extends into the middle part of the sedimentation area; the input end of the water return pipe is connected with one water outlet of the water pump; and the output end of the water return pipe extends into the interior of the gas dissolving tank.

[0008] The shovel groove is slidably installed at the upper part of the chamber of the main box, and the left end of the shovel groove extends into the gas floating layer; the slag suction pipe is installed on the main box, and the input end of the slag suction pipe extends into the space between the top wall of the shovel groove and the main box.

[0009] The slag suction pipe is connected with the external vacuum pump; in operation, the shovel groove moves above the sedimentation area of the main box, the wastewater is input into the mixing mechanism, and after the addition of the flocculant and the coagulant, the dissolved substances in the wastewater are precipitated as flocculants and coagulants; the wastewater containing the flocculants and the coagulants is input into the gas mixing area of the main box, and the wastewater is mixed with the gas dissolved water containing a large amount of air output by the air pumping pipe; the gas dissolved water releases pressure, and the air therein is precipitated as a large amount of micro-bubbles and adsorbs the flocculants and the coagulants in the wastewater; the flocculants and the coagulants are gathered into groups and then float up to the gas floating layer; the clean water below the gas floating layer flows into the sedimentation area; the clean water in the middle part of the sedimentation area is pumped out by the water pump; part of the clean water is delivered to the subsequent treatment system, and the other part of the clean water is input into the gas dissolving tank through the water return pipe to be mixed with the high-pressure air to form the gas dissolved water; the gas dissolved water is input into the air pumping pipe through the water delivery pipe, so that the clean water is recycled; when the flocculants and the coagulants groups gathered in the gas floating layer reach the left end bottom of the specified thickness, the shovel groove moves left into the gas mixing area, so that the shovel groove shovels into the bottom of the gas floating layer, thereby collecting the flocculants and the coagulants groups into the upper part of the shovel groove; the vacuum pump operates to discharge the flocculants and the coagulants groups on the shovel groove out of the main box through the slag suction pipe for subsequent treatment; after the flocculants and the coagulants groups are discharged, the shovel groove is reset right; compared with the prior art, the slag groups are shovelled and discharged, so that the slag groups are not scattered, the slag groups do not sink away from the bubbles, and the slag removal efficiency is improved.

[0010] Preferably, the left end of the shovel groove is provided with a shovel plate, the middle part of the shovel plate is upwardly protruding, the left end of the shovel plate extends downwardly below the air floating layer, and the left part of the shovel plate is provided with a plurality of water filtering holes; when the shovel groove moves leftward, the left part of the shovel plate shovels the flocculating material and coagulating material groups floating in the air floating layer, so that the flocculating material and coagulating material groups are shovelled along the left part of the shovel plate, then over the protrusion and into the upper part of the shovel groove, improving the shovelling efficiency of the flocculating material and coagulating material groups, and blocking the flocculating material and coagulating material groups on the shovel groove to prevent the flocculating material and coagulating material groups from overflowing out of the shovel groove, thereby improving the collection efficiency of the flocculating material and coagulating material groups. The plurality of water filtering holes are configured to filter mixed wastewater when the flocculating material and coagulating material groups are shovelled upwardly along the left part of the shovel plate, thereby reducing the discharge of mixed wastewater and improving the removal efficiency of the flocculating material and coagulating material groups.

[0011] Preferably, the device further comprises two sliding rails, a plurality of sliding block frames and two pushing components, the two sliding rails are respectively installed on the inner walls of the front and rear sides of the main box body, the plurality of sliding block frames are installed on the shovel groove, the plurality of sliding block frames are respectively in sliding connection with the corresponding sliding rails, the fixed ends of the two pushing components are installed on the sliding block frames, and the piston rods of the two pushing components are connected with the main box body; the shovel groove is slidably installed on the two sliding rails through the plurality of sliding block frames, and the piston rods of the two pushing components are elongated or shortened to drive the shovel groove to move leftward and rightward, so that the shovel groove can shovel the flocculating material and coagulating material groups in the air floating layer and reset to the right, thereby improving the practicability.

[0012] Preferably, the device further comprises a movable partition plate, the movable partition plate is installed on the lower end face of the shovel groove, the lower end face of the movable partition plate is in contact with the upper end face of the gas mixing mechanism when the shovel groove is located in the gas mixing area, and the water suction pipe of the water pump is located at the right part of the movable partition plate; when the shovel groove is located in the sedimentation area of the main box body, the movable partition plate separates the water suction pipe of the water pump from the sedimentation area, thereby preventing the sediment from being sucked out by the water pump, improving the purity of the clean water and the sedimentation efficiency; when the shovel groove is located in the gas mixing area of the main box body to shovel the flocculating material and coagulating material groups, the lower end of the movable partition plate is in contact with the gas mixing mechanism, thereby separating the gas mixing area from the sedimentation area, preventing the flocculating material and coagulating material groups from overflowing into the sedimentation area, and improving the removal efficiency of the flocculating material and coagulating material groups.

[0013] Preferably, the device further comprises a fixed partition plate, a first sludge discharge pipe and a second sludge discharge pipe, the fixed partition plate is installed at the lower right part of the sedimentation area of the main box body, the top end of the fixed partition plate is aligned with the movable partition plate when the shovel groove is located in the sedimentation area, a clean water passage is arranged between the top end of the fixed partition plate and the movable partition plate, the input ends of the first sludge discharge pipe and the second sludge discharge pipe extend into the bottom of the sedimentation area of the main box body, and the first sludge discharge pipe and the second sludge discharge pipe are respectively located at the left side and the right side of the fixed partition plate; the sediment in the sedimentation area is respectively deposited to the left side and the right side of the fixed partition plate, most of the sediment is deposited to the left side of the fixed partition plate and discharged through the first sludge discharge pipe, and a small part of the sediment is deposited to the right side of the fixed partition plate and discharged through the second sludge discharge pipe, thereby improving the sludge discharge efficiency.

[0014] Preferably, the air inlet pipe, the inner container and the pressure sensor are further included, the inner container is installed in the inner part of the gas dissolving tank, an air layer is arranged between the inner container and the inner part of the gas dissolving tank, the output end of the air inlet pipe extends into the air layer, a plurality of micro pores are arranged on the inner container, the pressure sensor is installed on the gas dissolving tank, and the probe of the pressure sensor extends into the inner part of the gas dissolving tank; the air inlet pipe is connected with the high-pressure air system, the high-pressure air is input into the air layer between the inner container and the inner part of the gas dissolving tank through the air inlet pipe, and the high-pressure air is made to form micro bubbles through the plurality of micro pores of the inner container and then quickly dissolve into the clean water in the inner part of the gas dissolving tank, so that the efficiency of forming the gas dissolving water is improved, the pressure sensor detects the pressure in the inner part of the gas dissolving tank, and the opening and closing of the air inlet pipe are adjusted according to the pressure value, so that the pressure is kept stable.

[0015] Preferably, the medicine mixing mechanism includes a medicine mixing box, an inner partition plate, a waste water pipe, a first medicine adding pipe, a second medicine adding pipe and a third medicine adding pipe, the medicine mixing box is installed at the lower left part of the cavity of the main box body, a mixing cavity is arranged in the inner part of the medicine mixing box, the inner partition plate is installed at the middle part of the mixing cavity, a plurality of liquid passing holes are arranged on the inner partition plate, the mixing cavity is divided into a flocculation chamber and a coagulation chamber by the inner partition plate, the waste water pipe and the first medicine adding pipe both extend into the flocculation chamber after penetrating through the main box body, the second medicine adding pipe extends into the coagulation chamber after penetrating through the main box body, a liquid outlet pipe is installed on the medicine mixing box, the input end of the liquid outlet pipe extends into the inner part of the coagulation chamber, and a pump air pipe is located at the right side of the output end of the liquid outlet pipe; the waste water is input into the flocculation chamber of the medicine mixing box through the waste water pipe, the flocculant is input into the flocculation chamber through the first medicine adding pipe to mix with the waste water, so that the harmful substances dissolved in the waste water are flocculated and precipitated out, the flocculating substances flow into the coagulation chamber of the medicine mixing box through the liquid passing holes of the inner partition plate, the coagulant is input into the coagulation chamber through the second medicine adding pipe to mix with the waste water, so that the flocculating substances are coagulated into groups, and the waste water is input into the gas mixing area of the main box body through the liquid outlet pipe, so that the utility is good.

[0016] Preferably, the motor, the stirring shaft and a plurality of stirring rods are further included, the motor is installed outside the main box body, the stirring shaft is rotatably installed in the mixing cavity, the end part of the stirring shaft is in transmission connection with the output shaft of the motor, a plurality of stirring rods are installed on the outer wall of the stirring shaft, and the plurality of stirring rods are respectively located in the flocculation chamber and the coagulation chamber; the motor drives the stirring shaft and the plurality of stirring rods to rotate, so that the plurality of stirring rods stir and mix the waste water, the flocculant and the coagulant, and the mixing uniformity is improved.

[0017] Preferably, a plurality of arc-shaped plates are further included, the plurality of arc-shaped plates are uniformly installed on the stirring shaft in the circumferential direction, the input end of the liquid outlet pipe is provided with an arc-shaped opening, and the plurality of arc-shaped plates alternately shield the arc-shaped opening of the liquid outlet pipe; by arranging the plurality of arc-shaped plates, when the stirring shaft and the plurality of stirring rods stir the waste water, the flocculant and the coagulant, the plurality of arc-shaped plates alternately shield the arc-shaped opening of the liquid outlet pipe, when the arc-shaped plates shield the arc-shaped opening of the liquid outlet pipe, the waste water cannot be output through the liquid outlet pipe, when the arc-shaped plates are away from the arc-shaped opening of the liquid outlet pipe, the waste water is output through the liquid outlet pipe, the residence time of the waste water in the medicine mixing box is prolonged, and the waste water, the flocculant and the coagulant are mixed sufficiently.

[0018] Compared with the prior art, the present application has the beneficial effect that by shoveling and discharging the dross clusters, the dross clusters are prevented from being dispersed, the dross clusters will not sink away from the bubbles, and the dross removal efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the present application;

[0020] Figure 2 is a structural schematic diagram of the shovel groove in the right side state of the present application;

[0021] Figure 3 is a front cross-sectional structural schematic diagram of the shovel groove in the right side state of the present application;

[0022] Figure 4 is a front cross-sectional structural schematic diagram of the shovel groove in the left side state of the present application;

[0023] Figure 5 is a rear view axonometric structural schematic diagram of the present application;

[0024] Figure 6 is an axonometric structural schematic diagram of the present application;

[0025] Figure 7 is a structural schematic diagram of the medicine mixing mechanism;

[0026] Figure 8 is a structural schematic diagram of the inner baffle, liquid outlet pipe, motor, stirring shaft, stirring rod and arc-shaped plate structures;

[0027] Figure 9 is a structural schematic diagram of the shovel groove, shovel plate, water filtering hole, sliding rail, sliding block frame, pushing component and movable baffle structures;

[0028] Figure 10 is a structural schematic diagram of the gas dissolving tank, water feeding pipe, pump gas pipe, water pump, water return pipe, air inlet pipe and inner container structures;

[0029] Markings in the drawings: 1, main box body; 2, medicine mixing mechanism; 3, gas dissolving tank; 4, water feeding pipe; 5, pump gas pipe; 6, water pump; 7, water return pipe; 8, shovel groove; 9, dross suction pipe; 10, shovel plate; 11, water filtering hole; 12, sliding rail; 13, sliding block frame; 14, pushing component; 15, movable baffle; 16, fixed baffle; 17, first mud discharge pipe; 18, second mud discharge pipe; 19, air inlet pipe; 20, inner container; 21, pressure sensor; 22, medicine mixing box; 23, inner baffle; 24, waste water pipe; 25, first medicine adding pipe; 26, second medicine adding pipe; 27, liquid outlet pipe; 28, motor; 29, stirring shaft; 30, stirring rod; 31, arc-shaped plate. DETAILED DESCRIPTION

[0030] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0031] Example 1, as Figures 1 to 6 , Figure 9 and Figure 10 As shown, a dissolved air flotation machine includes a main housing 1, a mixing mechanism 2, an aerosol tank 3, a water delivery pipe 4, an air pump pipe 5, a water pump 6, a return water pipe 7, a shovel 8, and a sludge suction pipe 9. The main housing 1 has an internal chamber. The mixing mechanism 2 is installed in the lower left part of the chamber of the main housing 1. The space above the mixing mechanism 2 is a mixing zone, and the upper part of the mixing zone is the flotation layer. The mixing mechanism 2 is used to mix wastewater with flocculants and coagulants, and to transport the mixture to the mixing zone. The space to the right of the mixing mechanism 2 is a sedimentation zone. The aerosol tank 3 is installed... Outside the main housing 1, an aerosol tank 3 is used to mix clean water with high-pressure air to form aerosol water. The inlet end of the water supply pipe 4 extends into the interior of the aerosol tank 3, and the outlet end of the water supply pipe 4 is equipped with a pump pipe 5. The pump pipe 5 is installed at the bottom of the mixing zone. A water pump 6 is installed on the right side of the main housing 1. The pump pipe of the water pump 6 extends into the middle of the sedimentation zone. The inlet end of the return water pipe 7 is connected to one outlet of the water pump 6, and the outlet end of the return water pipe 7 extends into the interior of the aerosol tank 3. A shovel 8 is movably installed on the upper part of the chamber of the main housing 1. The left end of the shovel 8 extends into the air flotation chamber. In this layer, a slag suction pipe 9 is installed on the main housing 1, with its input end extending between the shovel groove 8 and the top wall of the main housing 1; it also includes a shovel plate 10, which is installed on the left end of the shovel groove 8, with the middle of the shovel plate 10 protruding upwards and the left end of the shovel plate 10 extending downwards to below the air flotation layer; the left side of the shovel plate 10 is provided with multiple filter holes 11; it also includes two slide rails 12, multiple slider brackets 13, and two pushing components 14, with the two slide rails 12 respectively installed on the front and rear inner walls of the main housing 1, and the multiple slider brackets 13 installed on the shovel groove 8, and the multiple slider brackets 14... 3 is slidably connected to two slide rails 12 respectively, and the fixed ends of the two pushing components 14 are mounted on the slider frame 13. The piston rods of the two pushing components 14 are connected to the main box 1. It also includes an air inlet pipe 19, an inner liner 20 and a pressure sensor 21. The inner liner 20 is installed inside the aerosol can 3. An air gap is set between the inner liner 20 and the interior of the aerosol can 3. The output end of the air inlet pipe 19 extends into the air gap. Multiple micro-pores are set on the inner liner 20. The pressure sensor 21 is installed on the aerosol can 3. The probe of the pressure sensor 21 extends into the interior of the aerosol can 3.

[0032] The shovel groove 8 is slidably mounted on the two slide rails 12 through the plurality of slide blocks 13, the piston rods of the two pushing components 14 are extended or shortened to drive the shovel groove 8 to move left and right, so that the shovel groove 8 can shovel the flocculation and coagulation groups in the air flotation layer and reset to the right, the slag suction pipe 9 is connected with an external vacuum pump, in operation, the shovel groove 8 moves to above the precipitation area of the main box body 1, the wastewater is input into the mixed medicine mechanism 2, after adding flocculants and coagulants, the dissolved substances in the wastewater are precipitated to form flocculation and coagulation, the wastewater containing flocculation and coagulation is input into the mixed gas mixing area of the main box body 1, so that the wastewater is mixed with the air-soluble water output by the pump air pipe 5, the air-soluble water releases pressure, the air in it forms a large number of micro-bubbles and precipitates and adsorbs the flocculation and coagulation in the wastewater, so that the flocculation and coagulation are gathered into groups and then float up and gather in the air flotation layer, the clear water below the air flotation layer flows into the precipitation area, the clear water in the middle of the precipitation area is pumped out by the water pump 6, part of the clear water is transported to the subsequent treatment system, and the other part of the clear water is input into the air-soluble tank 3 through the backwater pipe 7, the air inlet pipe 19 is connected with an external high-pressure air system, the high-pressure air is input into the air interlayer arranged between the inner container 20 and the inside of the air-soluble tank 3 through the air inlet pipe 19, and the high-pressure air forms micro-bubbles through the plurality of micro-pores of the inner container 20 and is quickly dissolved into the clear water in the air-soluble tank 3, so that the efficiency of forming air-soluble water is improved, the pressure sensor 21 detects the pressure in the air-soluble tank 3, and the opening and closing of the air inlet pipe 19 is adjusted according to the pressure value, so that the pressure is kept stable, the air-soluble water is input into the pump air pipe 5 through the water supply pipe 4, and the recycling of the clear water is formed; when the bottom of the flocculation and coagulation groups gathered in the air flotation layer is slightly higher than the left end of the shovel plate 10, the left part of the shovel plate 10 shovels the flocculation and coagulation groups floating in the air flotation layer when the shovel groove 8 moves to the left, so that the flocculation and coagulation groups are shovelled along the left part of the shovel plate 10 and then pass the protrusion to enter above the shovel groove 8, the efficiency of shovelling the flocculation and coagulation groups is improved, the flocculation and coagulation groups on the shovel groove 8 are blocked, and the flocculation and coagulation groups are prevented from overflowing out of the shovel groove 8, when the flocculation and coagulation groups are shovelled upwards along the left part of the shovel plate 10, the mixed wastewater is filtered out through the plurality of water filtering holes 11, the mixed wastewater is reduced, so that the flocculation and coagulation groups are collected as a whole to the upper part of the shovel groove 8, the vacuum pump operates to discharge the flocculation and coagulation groups on the shovel groove 8 through the slag suction pipe 9, and the subsequent treatment is performed on the main box body 1, after the flocculation and coagulation groups are discharged, the shovel groove 8 resets to the right; compared with the prior art, the floating slag groups are shovelled and discharged, the floating slag groups are prevented from being scattered, the floating slag groups will not sink away from the air bubbles, and the floating slag removal efficiency is improved.

[0033] Example 2, as Figures 1 to 4 , Figure 9As shown, on the basis of embodiment 1, further comprising a dynamic partition plate 15, the dynamic partition plate 15 is installed at the right part of the lower end surface of the shovel groove 8, when the shovel groove 8 is located in the air mixing area of the main box 1, the lower end surface of the dynamic partition plate 15 is in contact with the upper end surface of the mixed medicine mechanism 2, and the water suction pipe of the water pump 6 is located at the right part of the dynamic partition plate 15; further comprising a fixed partition plate 16, a sludge discharge pipe one 17 and a sludge discharge pipe two 18, the fixed partition plate 16 is installed at the right lower part of the sedimentation area of the main box 1, when the shovel groove 8 is located in the sedimentation area, the top end of the fixed partition plate 16 is aligned with the dynamic partition plate 15, a clear water channel is arranged between the top end of the fixed partition plate 16 and the dynamic partition plate 15, the input ends of the sludge discharge pipe one 17 and the sludge discharge pipe two 18 are both extended into the bottom of the sedimentation area of the main box 1, and the sludge discharge pipe one 17 and the sludge discharge pipe two 18 are respectively located at the left side and the right side of the fixed partition plate 16.

[0034] When the shovel groove 8 is located in the sedimentation area of the main box 1, the dynamic partition plate 15 separates the water suction pipe of the water pump 6 from the sedimentation area, avoids the sediment from being sucked out by the water pump 6, improves the purity of the clear water, and improves the sedimentation efficiency; the sediment in the sedimentation area is respectively deposited to the left side and the right side of the fixed partition plate 16, and most of the sediment is deposited to the left side of the fixed partition plate 16 and discharged through the sludge discharge pipe one 17, and a small part of the sediment is deposited to the right side of the fixed partition plate 16 and discharged through the sludge discharge pipe two 18, thereby improving the sediment discharge efficiency; when the shovel groove 8 is located in the air mixing area of the main box 1 to shovel the flocculating material and the coagulating material, the lower end of the dynamic partition plate 15 is in contact with the mixed medicine mechanism 2, thereby separating the air mixing area from the sedimentation area, avoiding the flocculating material and the coagulating material from overflowing into the sedimentation area, and improving the flocculating material and the coagulating material removal efficiency.

[0035] Embodiment 3, as Figures 1 to 4 , Figure 7 and Figure 8As shown, on the basis of embodiment 1, the medicine mixing mechanism 2 comprises a medicine mixing box 22, an inner partition plate 23, a waste water pipe 24, a first medicine adding pipe 25, a second medicine adding pipe 26 and a third medicine adding pipe 26, the medicine mixing box 22 is installed at the lower left part of the cavity of the main box body 1, a mixing cavity is arranged inside the medicine mixing box 22, the inner partition plate 23 is installed at the middle part of the mixing cavity of the medicine mixing box 22, a plurality of liquid passing holes are arranged on the inner partition plate 23, the mixing cavity is divided into a flocculation chamber and a coagulation chamber by the inner partition plate 23, the waste water pipe 24 penetrates through the main box body 1 and extends into the flocculation chamber of the medicine mixing box 22, the first medicine adding pipe 25 penetrates through the main box body 1 and extends into the flocculation chamber of the medicine mixing box 22, the second medicine adding pipe 26 penetrates through the main box body 1 and extends into the coagulation chamber of the medicine mixing box 22, a liquid outlet pipe 27 is installed on the medicine mixing box 22, the input end of the liquid outlet pipe 27 extends into the inside of the coagulation chamber, the pump air pipe 5 is located at the right side of the output end of the liquid outlet pipe 27; further comprising a motor 28, a stirring shaft 29 and a plurality of stirring rods 30, the motor 28 is installed outside the main box body 1, the stirring shaft 29 is rotatably installed in the mixing cavity of the medicine mixing mechanism 2, the end part of the stirring shaft 29 is in transmission connection with the output shaft of the motor 28, a plurality of stirring rods 30 are installed on the outer wall of the stirring shaft 29, and the plurality of stirring rods 30 are respectively located in the flocculation chamber and the coagulation chamber of the medicine mixing box 22; further comprising a plurality of arc-shaped plates 31, the plurality of arc-shaped plates 31 are uniformly installed on the stirring shaft 29 in the circumferential direction, the input end of the liquid outlet pipe 27 is provided with an arc-shaped opening, and the plurality of arc-shaped plates 31 alternately shield the arc-shaped opening of the liquid outlet pipe 27.

[0036] The waste water is input into the flocculation chamber of the medicine mixing box 22 through the waste water pipe 24, the flocculant is input into the flocculation chamber through the first medicine adding pipe 25 to mix with the waste water to make the harmful substances dissolved in the waste water flocculate and precipitate, the flocculating substances flow into the coagulation chamber of the medicine mixing box 22 through the liquid passing holes of the inner partition plate 23, the coagulant is input into the coagulation chamber through the second medicine adding pipe 26 to mix with the waste water to make the flocculating substances coagulate into groups, the motor 28 drives the stirring shaft 29 and the plurality of stirring rods 30 to rotate to make the plurality of stirring rods 30 stir and mix the waste water, the flocculant and the coagulant, improve the mixing uniformity, and the waste water is input into the gas mixing area of the main box body 1 through the liquid outlet pipe 27; by arranging the plurality of arc-shaped plates 31, when the stirring shaft 29 and the plurality of stirring rods 30 stir the waste water, the flocculant and the coagulant, the plurality of arc-shaped plates 31 alternately shield the arc-shaped opening of the liquid outlet pipe 27, when the arc-shaped plate 31 shields the arc-shaped opening of the liquid outlet pipe 27, the waste water cannot be output through the liquid outlet pipe 27, when the arc-shaped plate 31 leaves the arc-shaped opening of the liquid outlet pipe 27, the waste water is output through the liquid outlet pipe 27, the residence time of the waste water in the medicine mixing box 22 is prolonged, and the waste water, the flocculant and the coagulant are mixed sufficiently.

[0037] As Figures 1 to 10As shown, the gas dissolved air floatation machine of the present application, in operation, first shovel groove 8 moves to the precipitation area above the main box 1, waste water is input into the mixed medicine mechanism 2, after adding flocculant and coagulant, the dissolved substances in the waste water form flocculation and coagulation, the waste water containing flocculation and coagulation is input into the gas mixing area of the main box 1, the waste water is mixed with the air dissolved water containing a large amount of air output by the pump air pipe 5, the air dissolved water releases pressure, the air in it forms a large number of micro-bubbles and absorbs the flocculation and coagulation in the waste water, the flocculation and coagulation gather into groups and float to the air floatation layer, then the clear water below the air floatation layer flows into the precipitation area, the precipitates in the precipitation area are precipitated to the left and right sides of the fixed partition plate 16 respectively, and most of the precipitates are gathered to the left side of the fixed partition plate 16 and discharged through the sludge discharge pipe one 17, a small part of the precipitates is precipitated to the right side of the fixed partition plate 16 and discharged through the sludge discharge pipe two 18, then the clear water in the middle of the precipitation area is pumped out by the water pump 6, a part of the clear water is transported to the subsequent treatment system, and the other part of the clear water is input into the air dissolved tank 3 through the backwater pipe 7 and mixed with high-pressure air to form air dissolved water, the air dissolved water is input into the pump air pipe 5 through the water supply pipe 4, forming the recycling of clear water; when the flocculation and coagulation groups gathered in the air floatation layer reach a specified thickness, the two pushing components 14 drive the shovel groove 8 to move left, the left part of the shovel plate 10 shovels the flocculation and coagulation groups floating in the air floatation layer, so that the flocculation and coagulation groups are shovelled along the left part of the shovel plate 10 and then over the protrusion into the upper part of the shovel groove 8, the mixed waste water is filtered out through a plurality of water filtering holes 11, finally the vacuum pump operates to discharge the flocculation and coagulation groups on the shovel groove 8 out of the main box 1 for subsequent treatment, after the flocculation and coagulation groups are discharged, the shovel groove 8 is reset to the right.

[0038] The main functions realized by the present application are:

[0039] 1. By shoveling and discharging the scum groups, the scum groups are prevented from being dispersed, the scum groups will not sink away from the bubbles, and the scum removal efficiency is improved;

[0040] 2. When the flocculation and coagulation groups are shovelled upwards along the left part of the shovel plate 10, the mixed waste water is filtered out through a plurality of water filtering holes 11, the mixed waste water is reduced, and the flocculation and coagulation group removal efficiency is improved;

[0041] 3. The movable dynamic partition plate 15 is arranged, the dynamic partition plate 15 separates the water pump 6 from the precipitation area, the precipitates are prevented from being pumped out by the water pump 6, the clear water purity is improved, and the precipitation efficiency is improved; when the shovel groove 8 is located in the gas mixing area of the main box 1 to shovel the flocculation and coagulation groups, the lower end of the dynamic partition plate 15 is in contact with the mixed medicine mechanism 2, so as to separate the gas mixing area from the precipitation area, the flocculation and coagulation groups are prevented from overflowing into the precipitation area, and the flocculation and coagulation group removal efficiency is improved;

[0042] 4. High pressure air passes through the plurality of micro-pores of the inner container 20 to form micro-bubbles and quickly dissolve into the clean water inside the gas dissolving tank 3, thereby improving the efficiency of forming gas dissolved water;

[0043] 5. The wastewater can stay in the mixing tank 22 for a longer time, so that the wastewater and the flocculant and the coagulant can be mixed sufficiently.

[0044] The installation mode, connection mode or setting mode of the dissolved air flotation machine is a common mechanical mode, and as long as the beneficial effects can be achieved, the implementation can be carried out. The main tank body 1, the mixing mechanism 2, the gas dissolving tank 3, the pump air pipe 5, the water pump 6, the slag suction pipe 9, the slide rail 12, the pushing part 14, the first sludge discharge pipe 17, the second sludge discharge pipe 18, the air inlet pipe 19, the inner container 20, the pressure sensor 21, the mixing tank 22, the first dosing pipe 25, the second dosing pipe 26, the motor 28, the stirring shaft 29 and the stirring rod 30 of the dissolved air flotation machine are purchased on the market. The technical personnel in the industry only need to install and operate according to the attached instruction manual, and the technical personnel in the field do not need to pay creative labor.

[0045] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.

Claims

1. A dissolved air flotation machine comprising a main tank (1) having a chamber inside; characterized in that, The device further comprises a mixing mechanism (2), a gas dissolving tank (3), a water feeding pipe (4), a pump air pipe (5), a water pump (6), a water returning pipe (7), a shovel groove (8) and a sludge suction pipe (9); The mixing mechanism (2) is installed at the lower left part of the chamber of the main box body (1), the space above the mixing mechanism (2) is a gas mixing area, the upper part of the gas mixing area is a gas floating layer, the mixing mechanism (2) is used for mixing the wastewater with the flocculant and the coagulant to form a mixed liquid, and the mixed liquid is delivered to the gas mixing area, and the right space of the mixing mechanism (2) is a sedimentation area; The gas dissolving tank (3) is installed outside the main box body (1), the gas dissolving tank (3) is used for mixing the clean water with the high-pressure air to form gas dissolved water, the input end of the water feeding pipe (4) extends into the inside of the gas dissolving tank (3), the output end of the water feeding pipe (4) is installed with the pump air pipe (5), the pump air pipe (5) is installed at the bottom of the gas mixing area, the water pump (6) is installed at the right part of the main box body (1), the water suction pipe of the water pump (6) extends into the middle part of the sedimentation area, the input end of the water returning pipe (7) is connected with one water outlet of the water pump (6), and the output end of the water returning pipe (7) extends into the inside of the gas dissolving tank (3); The shovel groove (8) is slidingly installed at the upper part of the chamber of the main box body (1), the left end of the shovel groove (8) extends into the gas floating layer, and the sludge suction pipe (9) is installed on the main box body (1), and the input end of the sludge suction pipe (9) extends between the shovel groove (8) and the top wall of the main box body (1); The device further comprises a movable baffle (15), the movable baffle (15) is installed at the lower end face of the shovel groove (8), when the shovel groove (8) is located in the gas mixing area, the lower end face of the movable baffle (15) is in contact with the upper end face of the mixing mechanism (2), and the water suction pipe of the water pump (6) is located at the right part of the movable baffle (15); The device further comprises a fixed baffle (16), a first sludge discharge pipe (17) and a second sludge discharge pipe (18), the fixed baffle (16) is installed at the right lower part of the sedimentation area of the main box body (1), when the shovel groove (8) is located in the sedimentation area, the top end of the fixed baffle (16) is aligned with the movable baffle (15), a clean water channel is arranged between the top end of the fixed baffle (16) and the movable baffle (15), the input ends of the first sludge discharge pipe (17) and the second sludge discharge pipe (18) extend into the bottom of the sedimentation area of the main box body (1), and the first sludge discharge pipe (17) and the second sludge discharge pipe (18) are located at the left side and the right side of the fixed baffle (16) respectively. The mixing mechanism (2) comprises a mixing box (22), an inner partition plate (23), a wastewater pipe (24), a first dosing pipe (25), a second dosing pipe (26), and a second dosing pipe (26). The mixing box (22) is installed at the lower left part of the cavity of the main box body (1). The mixing box (22) is internally provided with a mixing cavity. The inner partition plate (23) is installed at the middle part of the mixing cavity. The inner partition plate (23) is provided with a plurality of liquid passing holes. The inner partition plate (23) divides the mixing cavity into a flocculation chamber and a coagulation chamber. The wastewater pipe (24) and the first dosing pipe (25) both pass through the main box body (1) and extend into the flocculation chamber. The second dosing pipe (26) passes through the main box body (1) and extends into the coagulation chamber. The liquid outlet pipe (27) is installed on the mixing box (22). The input end of the liquid outlet pipe (27) extends into the interior of the coagulation chamber. The pump air pipe (5) is located at the right side of the output end of the liquid outlet pipe (27). The mixing mechanism (2) further comprises a motor (28), a stirring shaft (29), and a plurality of stirring rods (30). The motor (28) is installed outside the main box body (1). The stirring shaft (29) is rotatably installed in the mixing cavity. The end of the stirring shaft (29) is in transmission connection with the output shaft of the motor (28). A plurality of stirring rods (30) are installed on the outer wall of the stirring shaft (29). The plurality of stirring rods (30) are respectively located in the flocculation chamber and the coagulation chamber. The mixing mechanism (2) further comprises a plurality of arc-shaped plates (31). The plurality of arc-shaped plates (31) are uniformly installed on the stirring shaft (29) in the circumferential direction. The input end of the liquid outlet pipe (27) is provided with an arc-shaped opening. The plurality of arc-shaped plates (31) alternately shield the arc-shaped opening of the liquid outlet pipe (27).

2. A dissolved air flotation machine as claimed in claim 1 wherein, The left end of the shovel groove (8) is provided with a shovel plate (10). The middle part of the shovel plate (10) protrudes upward. The left end of the shovel plate (10) extends downward to below the air floating layer. The left part of the shovel plate (10) is provided with a plurality of water filtering holes (11).

3. A dissolved air flotation machine as claimed in claim 1 wherein, The mixing mechanism (2) further comprises two slide rails (12), a plurality of slide block frames (13), and two pushing components (14). The two slide rails (12) are respectively installed on the inner walls of the front and rear sides of the main box body (1). The plurality of slide block frames (13) are installed on the shovel groove (8). The plurality of slide block frames (13) are respectively in sliding connection with the corresponding slide rails (12). The fixed ends of the two pushing components (14) are installed on the slide block frames (13). The piston rods of the two pushing components (14) are connected with the main box body (1).

4. A dissolved air flotation machine as claimed in claim 1 wherein, The mixing mechanism (2) further comprises an air inlet pipe (19), an inner container (20), and a pressure sensor (21). The inner container (20) is installed in the interior of the gas dissolving tank (3). An air interlayer is formed between the inner container (20) and the interior of the gas dissolving tank (3). The output end of the air inlet pipe (19) extends into the air interlayer. A plurality of micro air holes are formed on the inner container (20). The pressure sensor (21) is installed on the gas dissolving tank (3). The probe of the pressure sensor (21) extends into the interior of the gas dissolving tank (3).

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