CN1293928C

CN1293928C - Method for debubbling surface of pond and debubbling equipment

Info

Publication number: CN1293928C
Application number: CNB2004100176522A
Authority: CN
Inventors: 钱峥
Original assignee: HANGZHOU COMMERCIAL COLLEGE
Current assignee: HANGZHOU COMMERCIAL COLLEGE
Priority date: 2004-04-08
Filing date: 2004-04-08
Publication date: 2007-01-10
Anticipated expiration: 2024-04-08
Also published as: CN1562434A

Abstract

The present invention relates to a method and a device for defoaming on a pond surface. In the method, at least one movable heater is arranged above the water surface of a pond; by the slow motion of the movable heater above the pond surface, foam on the pond surface is heated to crack. The device comprises a movable stand which is dragged by a motor and is arranged on tracks on both sides of the pond, and a heater which moves following the movable stand is arranged below the movable stand, or the device comprises a rotary stand which is driven by the motor and is arranged at the side of the pond or at the middle of the pond, and the rotary stand can rotate along a central rotary shaft. An electric heater is arranged below the rotary stand. Thus, the present invention has the characteristics of simple and feasible defoaming method, simple device structure, convenient installation, low operation cost, good defoaming effect, no secondary environmental pollution, etc.

Description

The debubbling method and the defoaming device of pond, pond face

Technical field

What the present invention relates to is a kind of method and defoaming device that utilizes electrical heating to eliminate pond, pond papula foam, mainly be applicable to the elimination that aeration tank produces a large amount of foams in the sewage disposal running, but extensive use in pharmaceutical wastewater, chemical fiber waste water, dyeing waste water and wastewater from chemical industry is also eliminated applicable to the foam of pond, pond face in the processes such as papermaking, fermentation.

Background technology

At the sewage disposal running, ubiquity aeration tank foam a lot of phenomenons, especially industrial wastewater such as dyeing waste water, wastewater from chemical industry, the aeration tank foam often occurs and pile up, even the phenomenon in foam envelope pond occurs, cause the oxygen supply deficiency, sedimentation basin mud-water separation effect is bad, handles the water outlet muddiness.

At a lot of situation of sewage disposal running aeration tank foam, what generally adopt at present is to add defoamer and the high-pressure spraying network of rivers is installed.It is very high to add the defoamer cost, organic oil commonly used, kerosene, silicone oil, and the throwing amount is 0.5-1.5mg/l.But through very short time foam can pile up again again, and defoamer itself is a kind of pollutant, a large amount of defoamers enter sewage disposal system, have increased the load of system, may cause the effluent quality variation, the rising of water outlet COD value.Manually add defoamer and strengthened working strength, operation is very inconvenient especially at night, has potential safety hazard.

The high-pressure spraying network of rivers is installed can prevents that foam is excessive, if but can cause line clogging with handling the water outlet spray, then can increase a large amount of operating costs with the running water spray.In addition, can cause the facility surrounding enviroment abominable after the operation behind the high-pressure spraying network of rivers: water smoke fills the air, situations such as aisle sewage crossing current, and maintenance is also inconvenient.

Defoaming device was eliminated the method that foam is piled up before technology was set in addition, and as processing methods such as deaeration towers, effect is also not obvious in actual motion.

Summary of the invention

The objective of the invention is to overcome the deficiency of above-mentioned existence, and a kind of cesspool electric heating debubbling method and the defoaming device that can effectively eliminate the foam in the cesspool be provided, the debubbling method of pond, this pond face, it is to be provided with at least one movable heater above the water surface of the pond in pond, utilize this heater moving at a slow speed above the face of pond, pond, make the foam on the face of pond be subjected to thermal fracture.

But described moveable heater comprise a kind of electric heater that Chi Mianshang can move around or a kind of on the face of pond the electric heater of left-right rotation.

The surface temperature of described heater is at 200----500 ℃, and translational speed is 26---60cm/min.

The surface temperature of described heater is at 300----400 ℃, and translational speed is 40---55cm/min.

The defoaming device of the debubbling method of pond, a kind of pond face, it includes by motor and drags and be positioned in movable stand on two siding tracks of pond, and the heater that moves with movable stand is installed under this movable stand.

Described movable stand is placed on the track by the bottom wheel, and its wheel shaft links to each other with motor after being connected in decelerator, and the electric heater of being made up of heating wire is installed under the movable stand.

Described heating wire becomes L shaped, and power line is connected on the end of heating wire; Described track two ends respectively are provided with contact-making switch, and this contact-making switch is serially connected on the control circuit of motor by the relay group.

The defoaming device of the debubbling method of pond, a kind of pond face, it also can be to include by driven by motor and be positioned in the pond pool side or rotating turret that Chi Zhongke rotates along center rotating shaft, this rotating turret below is equipped with electric heater.

Described center rotating shaft links to each other with motor by decelerator, and the electric heater that is placed in below the rotating turret is made up of heating wire.

Described heating wire becomes L shaped, and power line is connected on the end of heating wire; On the extreme position of the rotation both sides of rotating turret a spacing contact-making switch is installed respectively, this spacing contact-making switch is serially connected on the control circuit of motor by the relay group.

The present invention is the higher temperature that utilizes the electrothermal wire heating, the foam surface nonuniform heating, cause local surface tension to go to zero and lather collapse, reach the purpose of eliminating foam, the method that it has froth breaking is simple, feasible, and apparatus structure is simple, simple installation, and operating cost is low, defoaming effect is splendid, and can not cause characteristics such as secondary environmental pollution.

Description of drawings

Fig. 1 is the schematic diagram before bubble surface is heated in the cesspool of the present invention.

Fig. 2 is the schematic diagram that bubble local heating forms surface tension gradient in the cesspool of the present invention.

Fig. 3 is the schematic diagram that bubble breaks in the cesspool of the present invention.

Fig. 4 is the effect schematic diagram that bubble layer top bubble is heated in the cesspool of the present invention.

Fig. 5 is a kind of defoaming device structural representation of the present invention.

Fig. 6 is an another kind of defoaming device structural representation of the present invention.

Fig. 7 is another defoaming device structural representation of the present invention.

Fig. 8 is another defoaming device structural representation of the present invention.

Fig. 9 is an electric heater structural representation of the present invention.

The present invention will be described in detail below in conjunction with accompanying drawing: shown in Figure 1, bubble in the cesspool of the present invention is for having surfactant 1 or macromolecular compound to get involved the dense foam that water forms, be that only quilt one deck liquid film 2 as thin as a wafer separates, the dense bubble that forms the polyhedron bubble and pile up, form more stablely, be difficult for destroyed.

Shown in Figure 2 because molecular force changes with the situation of change of intermolecular distance: when two molecules each other at a distance of about r=10 ^-8During cm, suffered repulsion and the lucky balance of gravitation on each molecule; When intermolecular distance during less than r, molecular force shows as repulsion; When bimolecular spacing during greater than r, molecular force shows as gravitation, and the characteristics of this gravitation are that the size of power increases along with distance and goes to zero very soon.Rising along with fluid temperature, molecule increases in the amplitude of its equilbrium position vibration, relaxation time increases sharp, and the diffusion of molecule is accelerated, simultaneously, rising along with temperature, the molecule that those warm-up movement kinetic energy are bigger can overcome the gravitation of fluid molecule and become vapor molecule, thereby density of liquid reduces, and the attraction of molecule also reduces thereupon, the surface potential energy reduces, so surface tension has also just reduced.Utilize the local temperature of heating wire higher,, form local surface tension gradient 3 at the foam surface nonuniform heating.Shown in Figure 3, liquid film 2 meeting tendencies toward shrinkages, further being heated makes very thin liquid film hydrone evaporate herein, causes local surface tension to go to zero and the result of lather collapse 4.

The surfactant of easily degrading in the common surfactant is as α-Xi Jihuangsuanyan, amine oxide, polyoxyethylene nonionic, amphoteric ion type and natural surfactant; Reach surfactant, in experiment, all obtained very good effect as alkylaryl sulfonates, polyoxyethylated alkyl phenol etc. than difficult degradation.

Experiment shows: under the condition of cesspool surfactant foam thickness 10-30cm, when the heating wire surface temperature maintained 200-300 ℃ of scope, the average translational speed 40-26cm/min effect of heating wire was best; , when the heating wire surface temperature maintained 300-400 ℃ of scope, the average translational speed 40-55cm/min effect of heating wire was best; When the heating wire surface temperature maintained 400-500 ℃ of scope, the average translational speed 55-60cm/min effect of heating wire was best; The effective elimination factor of foam reaches more than 90%, can reach with minimum energy consumption like this foam is effectively controlled.

Shown in Figure 4, electric heating debubbling method of the present invention, it is to be provided with at least one removable or rotate heater 5 above the water surface of cesspool, utilize the moving at a slow speed or rotating above the face of cesspool pond of this heater, make foam 6 on the face of pond be subjected to thermal fracture and froth breaking so just can be controlled at the froth bed in the cesspool within the certain height.This foam device that disappears can be controlled the foam of cesspool effectively, and operating cost is lower, also can not cause secondary environmental pollution.

Figure 5 shows that but a kind of defoaming device of the present invention includes by driven by motor and is positioned in the rotating turret 8 of sewage pool side 7 left-right rotation 180 degree, this rotating turret is placed on the support 10 of pool side by a turning cylinder 9, turning cylinder 9 links to each other with motor by decelerator, and electric heater 11 is installed below rotating turret 8; This electric heater mainly is made up of heating wire 12.On the extreme position of the rotation both sides of rotating turret 8 a spacing contact-making switch is installed respectively, this spacing contact-making switch is serially connected on the control circuit of motor by the relay group.

Figure 6 shows that the defoaming device of the close structure of another kind of the present invention, it includes by driven by motor and is positioned in the rotating turret 8 that but left-right rotation 90 is spent on cesspool one arm of angle, this rotating turret is placed on the support 10 of pool side by a turning cylinder 9, turning cylinder 9 links to each other with motor by decelerator, and electric heater 11 is installed below rotating turret 8; This electric heater mainly is made up of heating wire 12.On the extreme position of the rotation both sides of rotating turret a spacing contact-making switch is installed respectively, this spacing contact-making switch is serially connected on the control circuit of motor by the relay group.

Figure 7 shows that the defoaming device of another close structure of the present invention, it includes by driven by motor and is positioned on the cesspool center rotating turret 8 that can rotate with center rotating shaft 9, center rotating shaft 9 is placed in by in the middle of the support 10 that is fixed in the cesspool both sides, turning cylinder 9 links to each other with motor by decelerator, the center fixed of described rotating turret 8 is on turning cylinder 9, and its below is equipped with electric heater 11; This electric heater mainly is made up of heating wire 12; The present invention also can adopt the rotating turret of above-mentioned half length, and the one end is fixed on the turning cylinder, at this moment, need rotate 360 degree during rotating turret work.On the extreme position of the rotation both sides of rotating turret a spacing contact-making switch is installed respectively, this spacing contact-making switch is serially connected on the control circuit of motor by the relay group.More than three kinds of embodiment be the defoaming device structure content of rotary type.

Figure 8 shows that portable defoaming device structural representation of the present invention, it includes by motor and drags and be positioned in movable stand 14 on cesspool two siding tracks 13, described movable stand is placed on the track by the bottom wheel, its wheel shaft links to each other with motor after being connected in decelerator, and the electric heater 11 that moves with movable stand, be made up of heating wire 12 is installed for 14 times at this movable stand.Track of the present invention 13 two ends at least respectively are provided with a contact-making switch, and this contact-making switch is serially connected on the control circuit of motor by the relay group.

Shown in Figure 9,12 one-tenth of above-described heating wire are L shaped, and power line 15 is connected on the end of heating wire.

Claims

1, the defoaming device of pond, a kind of pond face is characterized in that it includes by motor to drag and be positioned in movable stand on two siding tracks of pond, and the heater that moves with movable stand is installed under this movable stand.

2, defoaming device according to claim 1, it is characterized in that described movable stand (14) is placed on the track (13) by the bottom wheel, its wheel shaft links to each other with motor after being connected in decelerator, and the electric heater of being made up of heating wire (12) (11) is installed under the movable stand (14).

3, defoaming device according to claim 2 is characterized in that described heating wire (12) becomes L shaped, and power line (15) is connected on the end of heating wire; Described track (13) two ends respectively are provided with contact-making switch, and this contact-making switch is serially connected on the control circuit of motor by the relay group.

4, the defoaming device of pond, a kind of pond face is characterized in that it includes by driven by motor and is positioned in the pond pool side or rotating turret (8) that Chi Zhongke rotates along center rotating shaft (9), and this rotating turret (8) below is equipped with electric heater (11).

5, defoaming device according to claim 4 it is characterized in that described center rotating shaft (9) links to each other with motor by decelerator, and the electric heater (11) that is placed in below the rotating turret (8) is made up of heating wire (12).

6, defoaming device according to claim 5 is characterized in that described heating wire (12) becomes L shaped, and power line (15) is connected on the end of heating wire; On the extreme position of the rotation both sides of rotating turret (8) a spacing contact-making switch is installed respectively, this spacing contact-making switch is serially connected on the control circuit of motor by the relay group.