CN101700930B

CN101700930B - Automatic spraying defoaming device for waste leachate

Info

Publication number: CN101700930B
Application number: CN2009101749613A
Authority: CN
Inventors: 高波
Original assignee: NINGBO YINZHOU LVZHOU ENERGY UTILIZATION CO Ltd
Current assignee: NINGBO YINZHOU LVZHOU ENERGY UTILIZATION CO Ltd
Priority date: 2009-10-21
Filing date: 2009-10-21
Publication date: 2011-05-11
Anticipated expiration: 2029-10-21
Also published as: CN101700930A

Abstract

The invention relates to an automatic spraying defoaming device for waste leachate treatment, which comprises a biochemical reaction basin and an aeration device arranged in the biochemical reaction basin. A microwave probe for detecting foam height and a spraying hole tube are arranged above the water surface of the biochemical reaction basin; the microwave probe is connected with a spraying controller arranged outside the biochemical reaction basin; a control switch of the spraying controller is connected with a circulating water pump arranged under the water surface of the biochemical reaction basin; and the circulating water pump is connected with the spraying hole tube by a connecting tube to form a circulating device for waste water spraying and defoaming. The invention realizes the spraying and defoaming treatment in the aerobic phase of leachate biochemical treatment, solves dirt blockage during waste water spraying, avoids using a defoaming agent, thereby not only preventing secondary pollution, but also saving the cost of waste water treatment, wherein the automatic circulating defoaming treatment saves three fifths of defoaming cost, more than 90% electrical energy, and more than 95% waste water treatment cost, and can be popularized and applied to large-scale waste treatment sites.

Description

Garbage leachate is handled automatic spraying defoaming device

Technical field

The present invention relates to domestic garbage disposer, particularly ooze the monitoring and the cancellation element of foam in the drop liquid processing procedure about house refuse.

Background technology

Along with attention and the investment of country to environmental protection cause, the engineering project of newly-built many large-scale domestic rubbish disposals in all parts of the country, the main mode of domestic rubbish disposal is the landfill of digging pit, and its subject matter is the garbage leachate outflow contaminated environment that produces a large amount of corrupt stenches.And at present to the processing of garbage leachate based on biochemical technology, the processing stage of sewage aerobic, can produce a large amount of excessive foams, excessive foam not only has a strong impact on surrounding environment, but also influences the normal operation for the treatment of apparatus.For solving the harm of this foam, mainly be to throw in defoamer at present, this not only causes the increase of domestic rubbish disposal expense, but also produces defoamer to second environmental pollution.Country is about the regulation of " household refuse landfill sites pollution control criterion ", and garbage leachate is handled qualified discharge and will be used film to handle, and defoamer can not pass through film, accumulates in treatment system easily, makes the treatment system can't operate as normal.Therefore both do not met the state sewage emission standard requirement with defoamer, and in fact increased expense and can't implement.

Spraying defoaming generally is used in the trade effluent treatment system, it mainly is the comparison clean water spray froth breaking that utilizes after the secondary precipitation, but still have the spray nozzle blockage problem, particularly reuse secondary precipitation water cost is too high for house refuse is oozed the handling of drop liquid dozens of yuan per ton.The spray defoaming device that CN201249055Y proposes remains at the trade effluent treatment system, for the quality requirement height of shower water, still will utilize the clean water after the secondary precipitation, and for spray nozzle clogging without any protection measure.And concern problem owing to do not consider the monitoring of foam and control, therefore use the spray froth breaking still to be in passive blindness state, safety shower when foam overflows often, perhaps 24 hours day and night not stop-spraying drench, cause workman, water resource and power wastage like this.For a change this passive emergency rating, should solve the spray obstructing problem, solve the observing and controlling problem of biochemistry pool sewage foam again, the foam feeler that a kind of probe rod type is arranged at present, it is the not only fouling easily of a mark post that is located at for a long time in the cesspool, and be difficult in time survey speed and the height that foam produces, influence timely froth breaking to keep the environment safe and sanitary.

Summary of the invention

The technical problem to be solved in the present invention is at the existing defective of above-mentioned sewage treating and de-foaming device, designing a kind of spray that can prevent blocks, can in time survey the generation height of foam again and in time spray froth breaking, reach and save artificial, power and water consumption, be convenient to bulky refuse processing field and apply.

The technical solution used in the present invention is, garbage leachate is handled automatic spraying defoaming device, comprise biochemical reaction tank and be located at the interior aerator of biochemical reaction tank, it is characterized in that above the water surface of biochemical reaction tank, being provided with microwave probe and the spray apertures pipe of surveying foam height; The described microwave probe spray controller outer with being located at biochemical reaction tank is connected, the gauge tap of described spray controller be located at the undersurface water circulating pump of biochemical reaction tank and be connected; Described water circulating pump connects into the EGR of sewage spray froth breaking by tube connector and spray apertures pipe.

Described spray apertures pipe is some parallel spray apertures pipes that are located at the biochemical reaction tank top, establishes the spray apertures that axial broken line intersects on the spray apertures tube wall.

Described microwave probe is the microwave emitter and the microwave receiver of intermittent transmission microwave.

Described spray controller comprises Programmable Logic Controller PLC and gauge tap, and Programmable Logic Controller PLC and gauge tap control microwave probe intermittent transmission microwave and control water circulating pump start automatically.

Beneficial effect of the present invention is very remarkable, has realized the application that spraying defoaming is handled at the aerobic stage that oozes the biochemical treatment of drop liquid, has solved the fouling blockage problem of using the effluent cycle spray; Avoid under this environment, using defoamer, not only prevent secondary pollution but also saved the sewage disposal expense, automatically 3/5 of froth breaking expense is saved in the circulation defoaming treatment, saves energy is more than 90%, reduce expenses more than 95% in the sewage disposal in this garbage disposal plant, can handle the field at bulky refuse and promote the use of.

Description of drawings

Fig. 1 is a spraying defoaming device schematic diagram of the present invention.

Fig. 2 is a spray apertures tubular construction schematic diagram.

Fig. 3 is foam monitoring de-bubble control block diagram.

The specific embodiment

House refuse in bulky refuse is handled through stack rot after, the rancid drop liquid that oozes must be through biochemical reaction tank many ponds oxidation processes repeatedly, establish the multi-stage biochemical reaction tank for this and become the clean water that meets discharging by sewage gradually, house refuse is oozed drop liquid composition complexity to be needed through cyclic aeration oxidation repeatedly, because air blast oxygenation makes in the sewage of biochemical reaction tank organic component and bubble form surging foam stream and constantly gushes on the water surface with blasting time, just rising unless you give your whole attention to it, it is high to exceed several meters of oilysewage surfaces, excessively go out biochemical reaction tank and cause the sewage foam to overflow excessively, rancid being full of in the air is particularly at rainy season severe contamination ground and air.

Referring to shown in Figure 1, the drop liquid introducing biochemical reaction tank 9 that oozes behind the house refuse heap carries out aerobic aeration, establish plurality of rows aerator arranged side by side in the bottom of biochemical reaction tank 9, the aeration plate 11 of aerator is connected with ventilation duct 12, small venthole is established on the surface of aeration plate 11, and gas forms bubble 10 in sewage under the hyperbar effect, and can not percolating water, it is 40～60 kPas that ventilation duct 12 charges into blast by air blast 13, and air quantity is 20～30m ³/ minute pressure air, make in the biochemical reaction tank sewage obtain abundant oxidation and carried out, blasted gas in the biochemical reaction tank 9 and under the sewage colloid is surrounded, form foam and waft on the water surface.

The water surface of biochemical reaction tank 9 is divided into water circulating pump 1, water circulating pump 1 is connected with the spray apertures pipe 3 that is located at water surface top by taking over 2, the two ends of spray apertures pipe 3 connect valve 5, the other end connects a blow-off pipe 6, water circulating pump 1 is squeezed into spray apertures pipe 3 with the sewage in the biochemical reaction tank 9, and is recycling by valve 5 controls at its two ends.Be located at the microwave probe 4 of biochemical reaction tank 9 tops, its openend is monitored the height of the foam 7 that floats on the water surface at any time facing to the water surface.

Spray apertures pipe 3 is located at the horizontal shower pipe of biochemical reaction tank 9 tops for parallel interval; select the ordinary rigid plastic water pipe for use; as shown in Figure 2; on the tube wall of spray apertures pipe 3, establish the spray apertures 14 that axial broken line intersects; the diameter of spacing 50～100mm spray apertures is 2～4mm between the spray apertures 14, in order to the spray head that replaces stopping up through regular meeting's fouling.Because the sewage oxygen of biochemical treatment foot, the bacterial micro-organism breeding is fast, when on spray apertures, stopping up because of microbial reproduction, only need beat spray apertures pipe 3 lightly or scrub spray apertures pipe 3 outer walls with wooden stick to make dirt fall down, when obstruction is serious, also only need sewage draining valve 5 and blow-off pipe 6 are temporarily opened and unloaded, add the big yield flushing, just can solve the spray apertures blockage problem.

Figure 3 shows that foam monitoring and foam control block diagram, comprise microwave probe 4 and antifoam controller 8, microwave probe 4 comprises that wavelength is microwave emitter and the microwave receiver of 500nm to 1 μ m.Antifoam controller 8 comprises Programmable Logic Controller PLC and gauge tap, connects automatic control switch and gauge tap at intermittence by Programmable Logic Controller PLC.Programmable Logic Controller PLC controls microwave emitting head intermittent transmission or launches wireless signal continuously, and can intermittently receive or receive continuously microwave signal by foam 7 reflected backs, gauge tap comprises manual control, controls automatically and intermittently controls and delay switch, automatically control comprises microwave signal control and circulation relay control automatically, automatic control switch and intermittence gauge tap be connected control by the PLC programmable controller.

Microwave probe 4 is located at the top of biochemical reaction tank 9, apart from water surface elevation is 30～50cm place, when water surface foam rises to when microwave probe 4 about 30cm are above, froth breaking foam controller 8 is received the microwave signal that foam reflects, connect water circulating pump 1 through the signal of telecommunication that the PLC Programmable Logic Controller is handled by relay switch, start water circulating pump 1 to foam spray, when foam 7 declines or disappearance, the receiver of microwave probe 4 does not receive the foam reflected signal, switch cuts out circulating pump automatically, stop spray, only when foam 7 produces and rises to 30～50cm, just carry out automatic spray, realize automatic froth breaking, according to the different needs of different biochemical reaction tank sewage oxidation fermentations, Programmable Logic Controller PLC regulates different spray models automatically, can be automatic spray, the spray that also can regularly spray or delay time is with the purpose that reaches using water wisely and save the energy.

Claims

1. a garbage leachate is handled automatic spraying defoaming device, comprise biochemical reaction tank and be located at aerator in the biochemical reaction tank, it is characterized in that above the water surface of biochemical reaction tank, being provided with operation wavelength and be the probe and the spray apertures pipe of the detection foam height of 500 nanometers～1 micron; The described probe spray controller outer with being located at biochemical reaction tank is connected, the gauge tap of described spray controller be located at the undersurface water circulating pump of biochemical reaction tank and be connected; Described water circulating pump connects into the EGR of sewage spray froth breaking by tube connector and spray apertures pipe.

2. garbage leachate according to claim 1 is handled automatic spraying defoaming device, it is characterized in that described spray apertures pipe is some parallel spray apertures pipes that are located at biochemical reaction tank (9) top, establishes the spray apertures (14) that axial broken line intersects on the spray apertures tube wall.

3. garbage leachate according to claim 2 is handled automatic spraying defoaming device, it is characterized in that spacing 50～100mm between the spray apertures (14) on the spray apertures pipe, and the diameter of spray apertures is 2～4mm.

4. garbage leachate according to claim 1 is handled automatic spraying defoaming device, it is characterized in that described aerator (11) is for being set up in parallel in biochemical reaction tank bottom ventilation ducts (12), charging into air pressure in the ventilation duct (12) is 50～70 kPas, and air quantity is 20～30m ³/ minute pressure air.

5. garbage leachate according to claim 1 is handled automatic spraying defoaming device, and the probe (4) that it is characterized in that described detection foam height is intermittent transmission device and receiver.

6. garbage leachate according to claim 1 is handled automatic spraying defoaming device, and the probe (4) that it is characterized in that surveying foam height is located at the place apart from water surface elevation 30～50cm.

7. garbage leachate according to claim 1 is handled automatic spraying defoaming device, it is characterized in that described spray controller comprises Programmable Logic Controller PLC and gauge tap, and connects control automatic control switch and gauge tap at intermittence by Programmable Logic Controller PLC.