CN2110634U

CN2110634U - High-efficient oxygen-mixed reactor

Info

Publication number: CN2110634U
Application number: CN92200854U
Authority: CN
Inventors: 王振声
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-01-20
Filing date: 1992-01-20
Publication date: 1992-07-22

Abstract

The utility model relates to a high-efficient oxygen-mixed reactor, belonging to the technical field of treating environmental engineering organic wastewater. The high-efficient oxygen-mixed reactor is used for treating domestic wastewater and various factories which uses agriculture, forestry, animal, auxiliaries and fish as raw materials; the high-efficient oxygen-mixed reactor is used for treating the organic waste water with medium or low concentration generated in the light industry, the chemical industry enterprises and the waste water through anaerobic digestion. The high-efficient oxygen-mixed reactor mainly fills air with the reactor, the biological growth and propagation is used for purifying the waste water. The high-efficient oxygen-mixed reactor is composed of two circulating systems, a waste water clarifying area and particulates. The high-efficient oxygen-mixed reactor has high efficiency of treating COD, BOD, having high air utilization ratio, having less sludge, having complete waste water treatment, and obtaining the exhaust standard. The utility model has high treating effects of simple structure, having low cost, and having floor waste water treatment; the utility model has high treating effect of waste water treatment.

Description

High-efficient oxygen-mixed reactor

The utility model belongs to organic sewage biological treating equipment technical field in the environmental engineering.Especially to sanitary sewage, with farming, woods, herd, the organic sewage of the middle lower concentration of secondary, each processing industry, light industry, chemical industry and food-processing industry that fish is raw material, and the sewage after anaerobic digestion has very high removal efficient.

At present the home and abroad environment expert generally acknowledges and adopts aerobic process to handle to organic sewage, processing efficiency height not only, and handle thoroughly, reach discharging standards after the processing.But this method must be in sewage sufficient enough oxygen and long duration of contact, just can reach the high processing effect.Certainly will build huge Steel Concrete aeration tank like this, the high air compressor of price also must be arranged, so that capital cost and working cost costliness, be regarded as a kind of method of with high investment, high running cost.Utilize cheap oxidation pond and oxidation ditch treatment process to come into one's own in recent years.But floor space is big especially, and for densely populated area, the land price costliness does not perhaps have enough land areas to account for and infeasible.The home and abroad environment expert has to find another way like this.

The self-priming ejector aerator of U.S. Goethe Le Si company invention, as shown in Figure 1.Organic sewage is squeezed in the ejector ［ 8 ］ by sump pump ［ 4 ］ by gate ［ 2 ］ and settling tank ［ 3 ］ backflow gate ［ 1 ］ simultaneously pari passu.Because the high-speed jet of water forms negative pressure in the chamber, air is sucked by inlet pipe ［ 9 ］, and air and sewage are sprayed by spray tube ［ 5 ］ simultaneously.Broken micro-bubble and sewage in the pond ［ 6 ］ circulate, and it is big that bubble constantly becomes in floating-upward process, overflows from the water surface at last.Aerobic bacteria growth and breeding in the sewage also digests sewage.Be back in the settling tank ［ 3 ］ by outflow tube ［ 10 ］ at last, postdigestive water flows out from settling tank top.［ 7 ］ be the support of ejector.

Fig. 2 is the self-priming turbine aerating machine equipment of Kawasaki, Japan company invention.Its working process is that organic sewage enters in the steel reinforced concrete pool ［ 11 ］ from water inlet pipe ［ 19 ］, sewage is full of back actuating motor ［ 15 ］, motor output shaft connects with hollow turboshaft ［ 13 ］ and turbine ［ 12 ］, and a small fan ［ 17 ］ is arranged in the cavity of turboshaft connection place.Behind starter motor, the turbine high speed rotating promotes effluent cycle, because the very high turbine place that makes of linear velocity forms negative pressure, air is sprayed in the sewage by the hollow vortex wheel shaft by cavity by inlet pipe ［ 16 ］ simultaneously.For the air capacity of strengthening spraying into, small fan is forced air inlet again, and broken small bubbles circulate with sewage.Because the buoyancy of bubble constantly collides change and is run out of by the water surface greatly.［ 18 ］ be digestion back relief outlet.

From Fig. 1 and Fig. 2 as can be seen, utilize economic many of air compressor inflation than tradition, the utilization ratio of oxygen is also high simultaneously.But also have a lot of weak points, as the short water surface of just overflowing of broken micro-bubble running way.The utilization ratio of oxygen is also lower.Equipment can not reach fully and mix, and can not guarantee the water conditioning of water outlet.Activated sludge concentration is low in the pond, and the sewage digestion time is long, and weak points such as the pond volume is big, cost height are bound to.

The purpose of this utility model is intended to solve above-mentioned difficult point, proposes the high-efficiency aerobic mixing reactor.Because internal recycle effect, self-priming turbine aerating machine (or ejector) high speed rotating makes current produce intensive and stirs and shearing force, mud, water, gas are dispersed into very thin little cenobium and small bubbles, produced gas, water, solid three-phase huge contact area and duration of contact, quickened absorption and the digestion of aerobic bacteria sewage.The mud Circulation returns in the fluidized-bed active sludge, increases activated sludge concentration, accelerates sewage digestion.

The internal circulation system that primary structure of the present utility model is made up of self-priming turbine aerating machine (or ejector), center guide and reactor wall; By overflow weir, settling tank and sludge pump and injector is formed external circulating system and particulate matter is formed.Sewage that comes out from equalizing tank and the mud that comes out by the settling tank bottom, squeeze in the reactor center guide by ejector with sludge pump pari passu by two gates, the high-speed jet effect of water, water and air is flow to the bottom along the center guide together, flow upward to settling section from circumferential weld again, particulate matter and sludge settling get off, postdigestive water and air is in overflow weir enters settling tank, in the mud Returning reactor after concentrating, improve sludge concentration, finished the outer circulation task.Because self-priming turbine aerating machine high speed rotating, mud, water, gas are cut into very thin particulate and blended flows downward very equably, from annular space, upwards flow to guide top, center again after on earth.Mud, water, gas are broken again, are entrainmented to the center guide by current simultaneously, promptly form internal recycle.Loaded the huge particulate matter (as sand, haydite, gac etc.) of surface-area in the reactor simultaneously, aerobic bacteria easily adheres to top growth and breeding, forms active very high microbial film on the particulate matter surface, has quickened the digestion of sewage.

Advantage of the present utility model: 1. clearance height, COD clearance be more than 80%, BOD ₅Be more than 95%, water inlet BOD ₅/ COD _CrBe 0.6, and the ratio of water outlet is 0.1; 2. active sludge reduces about 1 times than common law; 3. the COD volumetric loading is up to 43.5kgCOD/M ³D, and the high loading activated sludge process has only 2-4kgCOD/M ³D; 4. coefficient of oxygen utilization height, per kilogram BOD ₅The air capacity that is consumed is 9M ³(air)/kgBOD ₅, and high reactivity mud method has 40-50M ³(air)/kgBOD ₅5. the volume of equipment has only common-law 1/8～10; 6. floor space is little, simple in structure, cost is low; 7. operation scheme is flexible, but separate unit use, many parallel connections and the use of connecting.

Description of drawings:

Accompanying drawing 1 is self-priming ejector aerator structural representation;

Accompanying drawing 2 is self-priming turbine aerating machine aerator structural representation;

Accompanying drawing 3 is a kind of high-efficiency aerobic mixing reactor structural representation.

To further describe structure of the present utility model in conjunction with Fig. 3.

Organic sewage is from equalizing tank ［ 21 ］, gate ［ 22 ］ enters the water absorption tube of sump pump ［ 23 ］, the mud of settling tank ［ 28 ］ also enters water absorption tube (utilizing two gate control flooding quantitys and mud quantity of reflux) by gate ［ 24 ］ simultaneously, squeeze in the center guide ［ 30 ］ by ejector ［ 25 ］ then, because the high-speed jet effect of ejector, with water and jet institute inhaled air, be ejected into together in the guide of center, with mud, water and air breaks into very thin particulate, and bottom flowing down to, upwards flow to settling section ［ 35 ］ from the annular space of being organized by center guide and reactor wall ［ 29 ］ again, particulate matter and mud are because of gravity settling, and its center guide area is more suitable in the 0.1-0.8 scope with the ratio of annular space area.Postdigestive water flows into the settling tank ［ 28 ］ from overflow weir ［ 34 ］ and rising pipe ［ 33 ］, finishes the outer circulation task.Internal recycle utilizes self-priming turbine aerating machine ［ 37 ］ (or self-priming ejector) to finish.Behind the aerating machine starter motor, electric machine main shaft drives hollow turboshaft ［ 32 ］ and turbine ［ 31 ］ high speed rotating, forms negative pressure at the turbine place.Air is by inlet mouth ［ 36 ］, chamber and hollow turboshaft are sent to air in the sewage, and form small bubble under intensive stirs, gas, water, solid along the downward torrent of center guide ［ 30 ］, flow to bottom back annular space, bubble collides gradually and becomes big in flowing.The particulate matter cenobium is also being grown up simultaneously, is flowed downward because the turbine high speed rotating smashes again also to be entrainmented again, has finished internal recycle.Surplus air and postdigestive sewage flow into settling tank by settling section, overflow weir and water shoot, and gas is discharged from vapor pipe ［ 27 ］; Postdigestive water is discharged from bottom gate by the unnecessary active sludge of water shoot ［ 26 ］.The particulate matter (quartz sand, haydite, gac) of ［ 38 ］ adhering to for aerobic cenobium growth and breeding.

The utility model the results showed, the COD clearance is more than 80%, BOD ₅Be more than 95%; Water inlet BOD ₅/ COD _CrBe 0.6, and the ratio of water outlet is 0.1, illustrates that processing is more thorough, the active sludge that is produced reduces by 1 times than common law, and the COD volumetric loading is up to 43.5kgCOD/M ³D, and the high loading activated sludge process has only 2-4kgCOD/M ³D.The utilization ratio height of oxygen, per kilogram BOD ₅The air capacity that is consumed is 9M ³(air)/kgBOD ₅, and high reactivity mud method is 40-50M ³(air)/kgBOD ₅Sewage only stopped 1 hour in reactor, just can guarantee treatment effect preferably; And the volume of equipment has only common-law 1/8～10.

Claims

1, a kind of high-efficiency aerobic mixing reactor, it is characterized in that the internal circulation system that described reactor is made up of self-priming turbine aerating machine (or self-priming ejector), centre pipe and reactor wall, an external circulating system of forming by sludge pump, settling section, overflow weir and settling tank, and the particulate matter of biological growth breeding constitutes.

2, reactor according to claim 1 is characterized in that the ratio of centre pipe area and annular space area is in the 0.1-0.8 scope.