CN2154859Y

CN2154859Y - Multifunction aerobic organism fluidied bed

Info

Publication number: CN2154859Y
Application number: CN93205892U
Authority: CN
Inventors: 王振声
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-17
Filing date: 1993-03-17
Publication date: 1994-02-02
Anticipated expiration: 2003-03-17

Abstract

The utility model relates to a multifunction aerobic organism fluidized bed, which is suitable for treating domestic sewage, various industrial sewage which take raw materials from agriculture, forestery, husbandry, sideline production and fishery and the organic sewage with medium and low concentration in the production of light industry, chemical industry and various enterprises. The utility model mainly comprises three parts: a water and air intake system, a circulation fluidization zone and a sludge filtration clarifying area above the circulation fluidization zone. When treating the organic sewage, owing to the high concentration of active sludge and the sufficient oxygen, the utility model has good processing effect in a short time with little air consumption, little sludge amount, thorough sewage treatment and qualified water discharging. The utility model also has simple structure, low cost and low operation cost and is suitable for single use, parallel use and series use, and the utility model is easy for commercialization. The utility model has good treatment synthetic benefit for common sewage with aerobic and anaerobic treatment.

Description

Multifunction aerobic organism fluidied bed

The utility model belongs to organic sewage biological treating equipment field in the environmental engineering.Especially to sanitary sewage; With farming, woods, herd, pay, each processing industry that fish is raw material; In the industries such as light industry, chemical industry, medicine, the organic sewage of lower concentration; And, very high removal efficient is arranged through the sewage after the anaerobic digestion.

At present the home and abroad environment expert generally acknowledges and uses 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 air compressor of the higher atm number 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 working cost.Utilize cheap oxidation pond of working cost and oxidation ditch treatment process to come into one's own in recent years, but floor space is big especially, the area that yet produces the sewage quantity maximum just for densely populated area because the costliness of land price, 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 jet-flow aeration equipment of U.S. Goethe Le Si company invention, as shown in Figure 1.Organic sewage is by the mud backflow gate ［ 1 ］ of gate ［ 2 ］ settling tank ［ 3 ］, squeeze in the ejector ［ 8 ］ by sump pump ［ 4 ］ pari passu simultaneously, 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.［ 6 ］ internal recycle flows in the aeration tank for broken micro-bubble and sewage, and it is big that bubble constantly becomes in the process of come-up, overflows from the water surface at last.Sewage in the pond the aerobic bacteria growth and breeding and digest organic substance in the sewage, be back in the settling tank ［ 3 ］ by rising pipe ［ 10 ］ through postdigestive sewage, postdigestive water flows out from settling tank ［ 3 ］ top.［ 7 ］ be the support of ejector.

Fig. 2 is the self-priming turbine aerating machine aerator of Kawasaki, Japan company invention.Its working process is that organic sewage and post precipitation mud are squeezed in the steel reinforced concrete pool ［ 11 ］ by water inlet pipe ［ 20 ］, sewage is full of back actuating motor ［ 15 ］ motor output shaft and 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 sewage and mixes, 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.In order to increase the air capacity that sprays into, small fan is forced air inlet again, and broken micro-bubble circulates with sewage.Bubble in uphill process constantly collision change from small to big and on floating the water surface run out of.Postdigestive water and active sludge are entered in the settling tank ［ 19 ］ by vent pipe ［ 18 ］, the thickened sludge of post precipitation is by gate ［ 21 ］, processed sewage is by gate ［ 22 ］, both enter the inlet of ［ 23 ］ sludge pump by a certain percentage, pump outlet is squeezed in the concrete sump by water inlet pipe ［ 20 ］, finish the circulation of mud like this, improve the sludge concentration in the pond, reach the purpose that treatment effect is high and dwell time of sewage is short.

From Fig. 1 and Fig. 2 as can be seen, utilize the many of air compressor oxygenation economy than tradition, the utilization ratio of oxygen improves about 6 times simultaneously, and the residence time of sewage in the pond shortens more than 2 times than legacy equipment.But also have a lot of weak points.As the running way of the micro-bubble of smashing is short, the water surface of just overflowing, and dissolved oxygen is low, just the utilization ratio of oxygen is also low; Gas-liquid two-phase can not reach fully and mix in this equipment, can not guarantee the water conditioning of water outlet; In order to improve activated sludge concentration in the pond, must outside the pond, build settling tank, precipitating sludge is returned in the pond waste power with pump; Sewage residence time in the pond is also long, and the pond volume that is bound to is big, cost height or the like weak point.The volume that wants equipment is little, and the efficient height must be accomplished: competent oxygen is arranged, simultaneously the utilization ratio height of oxygen and consumption of power is few in the sewage lagoon; Activated sludge concentration (microorganism is many) height in its two pond, and digestion of organic matter is many; The 3rd in the pond gas, water, reach instantaneous admittedly and mix fully, improve gas, water, solid three-phase mass-transfer efficiency.From top Fig. 1 and Fig. 2, can see, also not reach top said 3 points.

The purpose of this utility model is intended to solve above-mentioned difficult point, proposes a kind of multi-functional aerobic biological fluid-bed.The huge particulate matter (as sand, haydite, zeolite etc.) of filling surface-area in fluidized-bed, aerobic microbiological adheres to top growth and breeding, increases activated sludge concentration.Utilize ejector (or micro-hole aerator) that air, sewage and various solution are squeezed in second ejector, because high-speed jet is entrainmented bottom sewage and particulate matter in second ejector again, by diffuser tube gas, water, the solid fluidized-bed center guide that sprays into together, prolong the upper limb that guide flows upward to tube, carry out gas, water, solid three phase separation herein, most water and whole particulate matter are flowed downward by inside and outside collet chuck crack, are entrainmented by high-speed jet again to the bottom, like this constantly circulation up and down.Make gas, water, reach mixing fully admittedly, reach maximum mass-transfer efficiency.Gas and unnecessary a part of sewage and small active sludge upwards flow in the triphase separator, and gas is discharged at the top, and small active sludge precipitates at this, and sedimentary mud flows downward from the folder crack of inner/outer tube again.Make and be full of mud and particulate matter in the fluidized-bed, reach the highest degree of activated sludge concentration, quicken organic digestion in the sewage, shortened the residence time in reactor, unnecessary active sludge is discharged by the middle part of triphase separator, and the clear water after the purification is discharged by the top of triphase separator.

Advantage of the present utility model: 1. activated sludge concentration height, the clearance height, dwell time of sewage is short, and the volume of equipment is little, and floor space is little; 2. because the mass-transfer efficiency height, the volumetric loading height of equipment; 3. the rate of transform height of oxygen, oxygenation capacity is few, and just the consumed cabin air amount is few, and power consumption is few; 4. operation scheme is flexible, but the separate unit use, and easy commercialization is produced in many parallel connections and the use of connecting.

Description of drawings:

Accompanying drawing 1 is self-priming jet-flow aeration device structure synoptic diagram;

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

Accompanying drawing 3 is a kind of multi-functional aerobic biological fluid-bed structural representation;

Accompanying drawing 4 is the another kind of method structural representation of a kind of multi-functional aerobic biological fluid-bed water inlet and air inlet.

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

The wind that pressure will be arranged with centrifugal blower, inject from ejector inlet ［ 31 ］, in ejector, form negative pressure, organic sewage and soup are sucked from suction port ［ 32 ］, sewage, soup and air are herein after the high-speed mixing, spray in second ejector ［ 34 ］ by nozzle ［ 33 ］, spray in the center guide ［ 35 ］ through trunnion and diffuser tube.Gas, water, solid (particulate matter of filling out in the tube) three-phase thorough mixing reach the maximum oxygen transfer rate and the effect of mass transmitting of maximum at this moment, continue upwards to flow to center guide upper limb.Upflow velocity must be controlled between 0.5～10 times of particulate matter free falling velocity in the guide of center.Because the sectional area of center guide upper limb enlarges, make and cover with biological particulate matter and big mud group flows downward from the annular space of center guide and outer wall ［ 36 ］ together.The ratio of annular space area and center guide area is at this between 0.8～3.8.Particulate matter and big mud roll into a ball the bottom again by nozzle ［ 33 ］ injection in the guide of center, gas, water, solid triphasic effect of mass transmitting have been strengthened in particulate matter and big constantly circulation of mud group like this.For guaranteeing the largest loop amount of particulate matter, gas, liquor ratio must be controlled in the scope of 3:1～15:1.Little mud group, gas, water flows upward in the inner core ［ 42 ］ of triphase separator, and gas is discharged from vapor pipe ［ 43 ］.Water and little mud group are from the eyelet on inner core top flows in tube ［ 40 ］ formed water conservancy diversion district, continue to flow downward, the last therefrom eyelet of tube bottom flows to and the formed settling section of triphase separator urceolus ［ 39 ］, because this district's sectional area is very big, upflow velocity is controlled in 0.1～5 mm/second scope.Because upflow velocity is very little, makes little mud group be suspended in this zone, and water outlet is played a role in filtering, water outlet is discharged by water shoot ［ 44 ］ from drainage tray ［ 41 ］, and the mud of suspension is regularly discharged by shore pipe ［ 45 ］ by mud drainage slot ［ 38 ］.Be easy to sedimentary mud group and little particulate matter, hydraucone and prolongation ［ 37 ］ by triphase separator flow downward with the formed annular space of urceolus ［ 39 ］, flow to ［ 35 ］ and ［ 36 ］ formed annular space at last, participate in again circulating.［ 46 ］ particulate matter of adhering to for the aerobe growth and breeding (as sand, haydite, zeolite etc.), a footpath of particulate matter is controlled at 0.3～5 millimeter and is advisable.［ 47 ］ be the fluidized-bed skirt.［ 48 ］ be blow-down pipe and recoil tube.

Accompanying drawing 4 is the another kind of method of a kind of multi-functional aerobic biological fluid-bed water inlet and air inlet, will further describe the structure of this method in conjunction with Fig. 4.This structure is that with Fig. 3 difference air inlet is different with inlet method, and all the other something in common no longer repeat.Pressurized air is entered by inlet pipe ［ 51 ］, aperture by micro-hole aerator ［ 55 ］ sprays then, gas, water, solid three-phase are upwards flowed at center guide ［ 54 ］, after reaching center guide upper limb, mud group and particulate matter by the annular space of center guide ［ 54 ］ and urceolus ［ 53 ］ to dirty, because ejection gas speed is big, mud group and particulate matter is entrainmented again to the center guide participate in circulation again.［ 56 ］ be water inlet pipe, recoil tube and evacuated tube.［ 52 ］ be the fluidized-bed skirt.

The utility model our experiments show that.Two kinds of water inlets and air inlet method all can reach promising result, and when brewery wastewater treatment, the COD clearance is more than 80%, and BOD is more than 95%.Waste water residence time in fluidized-bed is one hour, is 1/10～1/3 of other aeration residence time.The mud that is produced precipitates easily, and the sludge quantity of generation is about half of general method.The COD volumetric loading is 41Kg/m.d and the high loading activated sludge process has only 2～4Kg/m.d.The utilization ratio height of oxygen, the air capacity that per kilogram BOD is consumed is 9M/KgBOD, and high reactivity mud method is 40～60m/kgBOD.This occupation area of equipment is 1/10～1/4 of other activated sludge process.

Claims

1, a kind of multi-functional aerobic biological fluid-bed, it is characterized in that into water air inlet, ciculation fluidized district, triphase separator and particulate matter four are partly formed.

2, according to claim 1 aerobic biological fluid-bed, it is characterized in that, the water inlet air inlet enters first step ejector together by compression gas pipe and water inlet pipe, and its bleed pipe is again a second stage ejector nozzle, and the trunnion of second stage ejector, diffuser tube are formed.

3, according to claim 1 aerobic biological fluid-bed, it is characterized in that the water inlet air inlet is made up of compression gas pipe, micro-hole aerator and water inlet pipe.

4, according to claim 1 aerobic biological fluid-bed, it is characterized in that, ciculation fluidized district is made up of center guide and outer wall, center guide and the formed annular space area of outer wall are in 0.8～3.8 scope with the ratio of center guide area, and center guide upflow velocity is between 0.5～10 times of guide endoparticle thing free falling velocity.

5, according to claim 1 aerobic biological fluid-bed, it is characterized in that triphase separator is made up of inner core, middle tube and urceolus, sewage must be controlled in 0.1～5 mm/second scope at the upflow velocity that middle and urceolus form in the annular space.

6, according to claim 1 aerobic biological fluid-bed, it is characterized in that particulate matter is haydite, quartz sand and zeolite etc., the particle diameter of particulate matter is between 0.2～5 millimeter.