Air floating type sewage pretreatment device

Abstract

The utility model discloses an air floating type sewage pretreatment device which comprises an air floating box, the top of the air floating box is fixedly connected with an installation support, the top of the installation support is fixedly connected with a mixing cylinder, the top of the mixing cylinder is connected with a liquid inlet pipe in a sealed and inserted mode, and the mixing cylinder is connected with the air floating box through a connecting pipe. A rotating shaft is rotationally inserted between the inner walls of the two ends of the mixing barrel, a plurality of stirring blades are fixedly connected to the outer wall of the rotating shaft, the top of the mixing barrel is connected with an electromagnetic valve through a flange, and a liquid storage tank is inserted into the top end of the electromagnetic valve in a threaded mode. According to the sewage treatment device, the rotating shaft is driven to rotate under the driving of the motor and the transmission action of the belt while sewage is input, so that the stirring blades are driven to rotate, a flocculating agent and the sewage are preliminarily mixed, suspended matters are condensed together, the sewage is pretreated, and the sewage treatment efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially relates to a gas float type sewage pretreatment device. BACKGROUND

[0002] The gas float type sewage treatment is that air is passed into sewage in the form of small bubbles, the small bubbles and the particles suspended in the sewage adhere to form a water-gas-particle three-phase mixed system, the particles adhere to the bubbles and then float to the water surface to form a scum layer and are separated from the water.

[0003] At present, when the existing gas float type sewage treatment is carried out, a coagulant needs to be added to promote the aggregation of suspended matter so that the suspended matter adheres to the bubbles and floats, and most of the existing coagulants are directly added into sewage, so that the sewage cannot be pretreated, thereby reducing the reaction speed of the sewage and the flocculant and affecting the sewage treatment efficiency of the device. UTILITY MODEL CONTENT

[0004] The utility model discloses a gas float type sewage pretreatment device, which can solve the problems of the existing gas float type sewage treatment, i.e.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A gas float type sewage pretreatment device, comprising a gas float tank, a mounting bracket is fixedly connected to the top of the gas float tank, a mixing cylinder is fixedly connected to the top of the mounting bracket, a liquid inlet pipe is sealingly inserted into the top of the mixing cylinder, the mixing cylinder and the gas float tank are connected through a connecting pipe, a rotating shaft is rotatably inserted between the inner walls of the two ends of the mixing cylinder, a plurality of stirring blades are fixedly connected to the outer wall of the rotating shaft, an electromagnetic valve is connected to the top of the mixing cylinder through a flange, a liquid storage tank is threadedly inserted into the top end of the electromagnetic valve, a driving shaft and a driven shaft are rotatably inserted between the two sides of the top of the gas float tank, a synchronous belt is drivingly connected between the driving shaft and the driven shaft through a belt wheel, a plurality of elastic plates are fixedly connected to the outer surface of the synchronous belt, a screen strip is fixedly connected between the two elastic plates, a motor is fixedly connected to the outer wall of one side of the gas float tank, the output end of the motor is fixedly connected to one end of the driving shaft, a belt is drivingly connected between one end of the driving shaft and one end of the rotating shaft through a belt wheel, and a gas float mechanism is arranged in the gas float tank.

[0007] Further, the gas float mechanism comprises a plurality of gas distribution pipes, a plurality of one-way valves are threadedly inserted into the top of the gas distribution pipes, the plurality of gas distribution pipes are fixedly inserted between the inner walls of the two sides of the gas float tank, a main gas pipe is collectively sleeved to one end of the plurality of gas distribution pipes, and a gas pump is connected to one end of the main gas pipe.

[0008] Further, one end of the air float tank top is fixedly connected with two mounting plates, and the two mounting plates are fixedly connected with cleaning cotton.

[0009] Further, one end of the air float tank top is fixedly connected with two mounting plates, and the two mounting plates are fixedly connected with cleaning cotton.

[0010] Further, one end of the air float tank top is fixedly connected with two mounting plates, and the two mounting plates are fixedly connected with cleaning cotton.

[0011] Further, one end of the air float tank top is fixedly connected with two mounting plates, and the two mounting plates are fixedly connected with cleaning cotton.

[0012] Further, one end of the air float tank top is fixedly connected with two mounting plates, and the two mounting plates are fixedly connected with cleaning cotton.

[0013] The beneficial effects of the utility model are:

[0014] 1. Through the sewage input at the same time, the rotating shaft is driven to rotate under the driving of the motor and the transmission of the belt, so that the stirring blade is driven to rotate, and then the flocculating agent and the sewage are preliminarily mixed, so that the suspended solids are coagulated together, thereby the sewage is pretreated, and the efficiency of the sewage treatment is improved.

[0015] 2. Through the driving of the motor and the rotation of the driving shaft, the synchronous belt is driven to rotate, and then the screen bar is driven to move horizontally, and then the scum layer is scraped into the collecting box for collection, which is convenient and fast.

[0016] 3. Through the elastic force of the elastic plate, the screen bar is in contact and friction with the cleaning cotton, so that the screen bar is cleaned, so that the scum is better collected. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic view of the air float type sewage pretreatment device;

[0018] Figure 2 It is a three-dimensional structure schematic view of the air float type sewage pretreatment device;

[0019] Figure 3 It is a three-dimensional structure schematic view of the air float type sewage pretreatment device;

[0020] Figure 4 It is a three-dimensional structure schematic view of the air float type sewage pretreatment device;

[0021] In the figure: 1, air float box; 2, mounting bracket; 3, mixing cylinder; 4, liquid inlet pipe; 5, rotating shaft; 6, stirring blade; 7, liquid storage tank; 8, electromagnetic valve; 9, main air pipe; 10, branch air pipe; 11, check valve; 12, driving shaft; 13, driven shaft; 14, synchronous belt; 15, elastic plate; 16, sieve strip; 17, belt; 18, motor; 19, mounting plate; 20, cleaning cotton; 21, collection box; 22, slag discharge pipe; 23, liquid discharge pipe; 24, control valve. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] Reference Figures 1-4 A kind of air float type sewage pretreatment device, including air float box 1, air float box 1 top is fixed with mounting bracket 2 by bolt, the top of mounting bracket 2 is fixed with mixing cylinder 3 by bolt, the top of mixing cylinder 3 is sealed and is inserted with liquid inlet pipe 4, mixing cylinder 3 is connected between air float box 1 by connecting pipe, rotating shaft 5 is rotatably inserted between the inner wall of both ends of mixing cylinder 3, the outer wall of rotating shaft 5 is welded with multiple stirring blades 6, the top of mixing cylinder 3 is connected with electromagnetic valve 8 by flange, the top end of electromagnetic valve 8 is screwed and is inserted with liquid storage tank 7, electromagnetic valve 8 is opened, so that the flocculating agent in liquid storage tank 7 is slowly dropped into the sewage in mixing cylinder 3 by electromagnetic valve 8;

[0024] Driving shaft 12 and driven shaft 13 are rotatably inserted between the two sides of the top of air float box 1, synchronous belt 14 is connected between driving shaft 12 and driven shaft 13 by pulley transmission, the outer surface of synchronous belt 14 is fixed with multiple elastic plates 15 by bolt, sieve strip 16 is fixed between two elastic plates 15 by bolt, sieve strip 16 is elastic strip structure, sieve strip 16 is convenient for scraping off the filtration of sewage when floating dregs, the outer wall of one side of air float box 1 is fixed with motor 18 by bolt, the output end of motor 18 is fixedly connected with one end of driving shaft 12, the outer wall of one end of air float box 1 is fixed with collection box 21 by bolt, and the installation height of collection box 21 is higher than the height of sewage in air float box 1, under the driving of motor 18 and under the rotation of driving shaft 12, synchronous belt 14 is driven to rotate, in turn, sieve strip 16 is driven to move horizontally, in turn, floating dregs layer is scraped into collection box 21 and collected;

[0025] The end of driving shaft 12 and the end of rotating shaft 5 are connected by pulley transmission with belt 17, under the driving of motor 18, driving shaft 12 rotates, in turn, under the transmission of belt 17, rotating shaft 5 is driven to rotate, in turn, stirring blade 6 is driven to rotate, in turn, the flocculating agent and the sewage are preliminarily mixed, so that the suspended solids are coagulated together, thereby pretreating the sewage.

[0026] The air float tank 1 is provided with an air float mechanism, which comprises a plurality of air distribution pipes 10, the top of each air distribution pipe 10 is threadedly connected with a one-way valve 11, the air distribution pipes 10 are fixedly connected between the inner walls of the two sides of the air float tank 1, one end of each air distribution pipe 10 is jointly sleeved with a main air pipe 9, one end of the main air pipe 9 is connected with an air pump, under the action of the air pump, air is input into the air distribution pipes 10 through the main air pipe 9, and then the air is input into the sewage in the form of micro-bubbles through the one-way valves 11, so that the micro-bubbles adhere to the particles suspended in the sewage, forming a water-air-particle three-phase mixed system, and then the particles float on the water surface to form a scum layer;

[0027] One end of the top of the air float tank 1 is welded with two mounting plates 19, the two mounting plates 19 are fixedly connected with a cleaning cotton 20 through bolts, the screen strips 16 can contact with the cleaning cotton 20, and the screen strips 16 are in contact and friction with the cleaning cotton 20 under the elastic force of the elastic plates 15, so that the screen strips 16 are cleaned, the bottom of the collection box 21 is sealingly and insertingly provided with a residue discharge pipe 22, the scum is discharged from the residue discharge pipe 22, one end of the air float tank 1 is sealingly and insertingly provided with a liquid discharge pipe 23 in a detachable manner, a filter screen is arranged in the liquid discharge pipe 23, the filter screen can filter the sewage when being discharged, so as to avoid the flocculation sinking to the bottom, the liquid discharge pipe 23 is provided with a control valve 24, the sewage from which the suspended solids are removed is discharged when the control valve 24 is opened, a protective shell is fixedly connected between the outer wall of one end of the mixing cylinder 3 and the outer wall of one side of the air float tank 1 through bolts, the protective shell covers the outer side of the belt 17, so as to protect the belt 17, and a plurality of supporting frames are fixedly connected to the outer wall of the bottom of the air float tank 1 through bolts.

[0028] The working principle of the embodiment is as follows: in use, first, a predetermined volume of sewage is continuously input into the mixing cylinder 3 from the liquid inlet pipe 4 by using a conveying device, at the same time of the input of the sewage, the electromagnetic valve 8 is opened, the motor 18 is started, the driving shaft 12 is rotated under the driving of the motor 18, the rotating shaft 5 is rotated under the driving of the belt 17, so that the stirring blades 6 are rotated, in this process, the flocculating agent in the liquid storage tank 7 is slowly dropped into the sewage in the mixing cylinder 3 through the electromagnetic valve 8, so that the flocculating agent is preliminarily mixed with the sewage, and after the predetermined volume of the sewage and the predetermined volume of the flocculating agent are completely mixed, the sewage is stored in the air float tank 1, at this time, the water level in the air float tank 1 reaches a predetermined height, the sewage conveying is stopped, and the flocculating agent and the particles in the sewage form flocculation while being stationary;

[0029] At the same time of being stationary, the main air pipe 9 is connected with the air pump, compressed air is input into the air distribution pipes 10 through the main air pipe 9 under the action of the air pump, and then the air is input into the sewage in the form of micro-bubbles through the one-way valves 11, so that the micro-bubbles adhere to the particles suspended in the sewage, forming a water-air-particle three-phase mixed system, and then the particles carried by the bubbles float on the water surface to form a scum layer;

[0030] Simultaneously, driven by the motor 18 and rotating on the drive shaft 12, the synchronous belt 14 rotates, which in turn drives the screen bar 16 to move back and forth. The screen bar 16 extends into the water surface and scrapes up the scum layer during its movement, pushing the scum layer to move. Accompanied by the rotation of the synchronous belt 14, the scum layer is pushed into the collection box 21 for collection, and then discharged from the scum discharge pipe 22. Then, when the screen bar 16 moves above the collection box 21, the screen bar 16 will contact the lower surface of the cleaning cotton 20. Due to its elasticity, the screen bar 16 and the cleaning cotton 20 come into contact and rub against each other, thereby cleaning the flocculation remaining on the screen bar 16. The scraping operation is repeated until the operation is completed. Finally, the screen bar 16, cleaning cotton 20 and scum discharge pipe 22 are cleaned manually, the control valve 24 is opened, and the wastewater from which suspended solids have been removed is discharged for subsequent treatment. The drain pipe 23 is also removed and cleaned periodically. This completes one operation.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An apparatus for the preliminary treatment of sewage by means of air flotation, comprising an air flotation tank (1), characterised in that, The top of the gas float box (1) is fixedly connected with a mounting bracket (2), the top of the mounting bracket (2) is fixedly connected with a mixing cylinder (3), the top of the mixing cylinder (3) is sealingly plugged with a liquid inlet pipe (4), the mixing cylinder (3) is connected with the gas float box (1) through a connecting pipe, the inner walls of both ends of the mixing cylinder (3) are rotatably plugged with a rotating shaft (5), the outer wall of the rotating shaft (5) is fixedly connected with a plurality of stirring blades (6), the top of the mixing cylinder (3) is connected with an electromagnetic valve (8) through a flange, the top end of the electromagnetic valve (8) is threadedly plugged with a liquid storage tank (7), the driven shaft (13) is rotatably plugged between the two sides of the top of the gas float box (1), the synchronous belt (14) is drivingly connected between the driving shaft (12) and the driven shaft (13) through pulleys, the outer surface of the synchronous belt (14) is fixedly connected with a plurality of elastic plates (15), the sieve strips (16) are fixedly connected between two elastic plates (15), the outer wall of one side of the gas float box (1) is fixedly connected with a motor (18), the output end of the motor (18) is fixedly connected with one end of the driving shaft (12), one end of the driving shaft (12) is drivingly connected with one end of the rotating shaft (5) through a belt (17), and the gas float mechanism is arranged in the gas float box (1).

2. The air floatation type sewage pre-treatment device according to claim 1, characterized in that, The gas float mechanism comprises a plurality of gas distribution pipes (10), the top of the gas distribution pipe (10) is threadedly plugged with a plurality of one-way valves (11), the plurality of gas distribution pipes (10) are fixedly plugged between the inner walls of both sides of the gas float box (1), one end of the plurality of gas distribution pipes (10) is commonly sleeved with a main gas pipe (9), and one end of the main gas pipe (9) is connected with an air pump.

3. The air floatation type sewage pre-treatment device according to claim 1, characterized in that, One end of the top of the gas float box (1) is fixedly connected with two mounting plates (19), the two mounting plates (19) are fixedly connected with cleaning cotton (20), and the sieve strips (16) can contact the cleaning cotton (20).

4. The air floatation type sewage pre-treatment device according to claim 1, characterized in that, One end of the outer wall of the gas float box (1) is fixedly connected with a collection box (21), and the bottom of the collection box (21) is sealingly plugged with a slag discharge pipe (22).

5. The air floatation type sewage pre-treatment device according to claim 1, wherein One end of the gas float box (1) is detachably sealingly plugged with a liquid discharge pipe (23), a filter screen is arranged in the liquid discharge pipe (23), and a control valve (24) is arranged on the liquid discharge pipe (23).

6. The device according to claim 1, wherein The outer wall of one end of the mixing cylinder (3) is fixedly connected with the outer wall of one side of the gas float box (1), and a protective shell is arranged outside the belt (17).

7. The device according to claim 1, wherein The bottom outer wall of the gas float box (1) is fixedly connected with a plurality of support frames.

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