CN206680310U - Advanced treatment system after a kind of percolate evaporation gas washing - Google Patents

Abstract

The utility model provides advanced treatment system after a kind of percolate evaporation gas washing, advanced treatment system includes acid-base accommodation system and catalytic oxidation system after percolate evaporation gas washing, and the acid-base accommodation system includes coming liquid delivery pump, measuring pump, pipe-line mixer and on-line pH value detector；The catalytic oxidation system includes catalytic tower, oxygenerator, ozone generator, exhaust collection pond.Deep treatment method includes after percolate evaporation gas washing：By percolate, water outlet squeezes into pipe-line mixer by delivery pump after evaporation gas washing processing, carries out acid-base accommodation；Subsequently enter catalytic tower, after catalytic ozonation reacts water outlet discharged or reuse.The organic pollution remained in the evaporation gas washing water outlet of the utility model energy Quick Oxidation, further optimizes effluent quality, improves water outlet biodegradability, ensure the stability and reliability of qualified discharge.

Description

Advanced treatment system after a kind of percolate evaporation gas washing

Technical field

Wastewater processing technology is the utility model is related to, more particularly to a kind of percolate evaporates advanced treating system after gas washing System.

Background technology

Restricted by the level of economic development, China builds the life rubbish of real meaning since the phase at the end of the eighties in last century is just Rubbish sanitary filling field, and for garbage loading embeading, in stacking process the construction of caused percolate treatment facility then start to walk it is more late.With Economic level and people's living standard is gradually lifted, country payes attention to further for Environmental Protection Cause, puts into effect successively《Life Garbage loading embeading pollutant catabolic gene standard》GB16889-1997 and GB16889-2008 standards, gradually step up to pollutant emission mark Accurate requirement, some areas even require that final outflow water reaches provincial standard.Before this causes current green technology industry to face The opportunities and challenges not having.

At present, the conventional handling process of percolate mainly includes biochemistry+embrane method, DTRO embrane methods and evaporation, to protect Standard water discharge discharge is demonstrate,proved, mainly using UF membrane, charcoal absorption and Fenton oxidation method as tertiary treatment process (also known as depth Handling process).

Membrane separation process, mainly by the filtering step by step of milipore filter, NF membrane and reverse osmosis membrane, polluter is retained, constantly Optimize effluent quality.Membrane separation process has that effluent quality is good, the advantage such as simple to operate, but there is also it is easy block, the film replacement cycle It is short, the problems such as operating cost is high.It is larger due to concentrating liquid measure caused by UF membrane, as being disposed using recharge to landfill yard Mode, the concentrate for largely containing higher TDS will greatly improve the intake pressure and backwash frequency of reverse osmosis membrane, and most Cause the too fast polarization and failure of reverse osmosis membrane eventually, accelerate film replacement frequency, operating cost is too high.

Active carbon adsorption, the main polluter using in the charcoal absorption waste water with high surface area.This method Not only treatment effeciency is high and strong adaptability.But charcoal absorption finite capacity, it is difficult to carry out regeneration to it, need to periodically it enter Row is changed.Because its replacement cost is higher, its application in engineering is limited to a certain extent.

Fenton oxidation method, mainly with ferrous ion (Fe²⁺) catalyst is used as, with hydrogen peroxide (H₂O₂) carry out chemical oxidation Method of wastewater treatment.This method is applied widely, oxidability is strong and will not cause secondary pollution, pre- in every profession and trade waste water Processing and depth science and engineering are widely applied.However, increasing with its engineer applied, exposure in actual moving process Many problems.1. sludge quantity is big, processing cost is high；②Fe²⁺And H₂O₂The difficult control of ratio is added, color is easily returned in water outlet；3. corrode Property is strong；4. treatment effect is unstable.

Utility model content

The purpose of this utility model is, for above-mentioned conventional garbage percolate advanced treatment process operating cost height, place The problem of effect is unstable is managed, advanced treatment system after a kind of percolate evaporation gas washing is proposed, as garbage filter Advanced treatment process of the liquid after evaporating gas washing, can meet increasingly strict effluent quality discharge standard.

To achieve the above object, the technical solution adopted in the utility model is：It is deep after a kind of percolate evaporation gas washing Processing system, including acid-base accommodation system and catalytic oxidation system are spent, the acid-base accommodation system includes coming liquid delivery pump, metering Pump, pipe-line mixer and on-line pH value detector, it is described come liquid conveying pump discharge and measure pump discharge respectively with pipe-line mixer Entrance is connected, and the on-line pH value detector is arranged on pipe-line mixer export pipeline, the on-line pH value detector and meter Measure pump Electricity Federation；

The catalytic oxidation system includes catalytic tower, oxygenerator, ozone generator, exhaust collection pond, the catalysis Reaction tower bottom liquid inlet and pipe-line mixer outlet, the catalytic tower bottom gas inlet and ozone generator Outlet, the ozone generator entrance connect with oxygenerator, the catalytic tower top gas outlet and exhaust collection Pond connects, be provided with from bottom to top inside the catalytic tower water-locator, titanium aeration head, stainless steel filter head, wire packing layer, Catalyst filling layer and three phase separator.

Further, a diameter of 180mm of titanium aeration head, throughput 35-40m³/ h, the pressure loss are not more than 4kPa； The wire packing layer is made using 0.23-0.25mm 304 material filaments, filling thickness 150mm.

Further, catalyst model LTM-W in the catalyst filling layer, filling rate 11%, during use without Need to change.

Further, exhaust collection pond is percolate stoste regulating reservoir.

The operation principle of advanced treatment system, comprises the following steps after the utility model percolate evaporation gas washing：Profit It will be intake with pipe-line mixer and quickly mixed with 20%wt sodium hydroxide solutions, water inlet pH value is adjusted to 8.5~9；It is described enter After water is pH adjusted, enter catalytic tower from bottom, in catalytic tower under the catalytic action of catalyst filling layer, enter Ozone in catalytic tower is by the organic pollution oxidation Decomposition in water inlet into CO₂And H₂O, water outlet and residual ozone are through catalysis Left at the top of reaction tower.

Further, the rotating speed of measuring pump is automatically controlled by on-line pH value detector feedback electric signal, is automatically adjusted The dosage of 20%wt sodium hydroxide solutions.

Further, the inflow temperature is 25~30 DEG C, and upper speed is 2m/h, residence time 2h.

Further, the ozone is prepared using oxygenerator and ozone generator, and the ozone concentration produced is 100mg/L；The flow of oxygen is prepared by adjusting the oxygenerator, adjusts ozone air inflow.

Further, the water inlet is filtered by titanium aeration head, stainless steel successively after water-locator is dispersed with ozone Head, wire packing layer and catalyst filling layer, the bubble formed to the ozone are cut step by step, ensure it is described intake with it is micro- Bubble is sufficiently mixed, and ozone utilization rate is up to 90%.

Further, the water outlet and residual ozone are separated by three phase separator, leave the catalytic tower； The residual ozone flow to exhaust collection pond, and tolerance is about the 10% of ozone air inflow.

Advanced treatment system method after a kind of percolate evaporation gas washing of the utility model：By percolate through evaporation Water outlet squeezes into pipe-line mixer by delivery pump after gas washing processing, carries out acid-base accommodation；Catalytic tower is subsequently entered, is urged through ozone Water outlet is discharged or reuse after oxidation.Specifically, compared with prior art with advantages below：

1. water is mixed with the sodium hydroxide solution added using pipe-line mixer.Mixed compared to using reaction tank Close, pipe-line mixer is simple in construction, small volume, saving energy consumption, can be achieved rapidly and efficiently to mix.

2. LTM-W type heterogeneous catalysis is used, as ozone catalytic oxidation catalyst.The catalyst is with solid form In the presence of, it is active high, easily separated, stability is good the features such as.It is successfully avoid using the heterogeneous catalysis using H₂O₂、UV、 The catalyst brought in the catalyst process such as ultrasonic wave, activated carbon, metal (homogeneous) catalyst using operating cost it is higher, use Amount is big, it is continuous to need or often adds and decompose the drawbacks such as the secondary pollution that does not bring thoroughly.

3. water inlet and ozone pass through titanium aeration head, stainless steel filter head, wire packing layer and catalyst filling layer successively, to big Bubble is cut step by step, is ensured that water inlet is sufficiently mixed with microbubble, is improved ozone utilization rate, while prevents short flow phenomenon from sending out It is raw.

4. it can not only be reduced remaining smelly as the exhaust collection pond of residual ozone by the use of percolate stoste regulating reservoir The environment of oxygen influences, while can reduce subsequent treatment load with some organic pollutants in percolate.Compared to absorption method Have the characteristics that simple to operate, security is good, operating cost is cheap with ozone layer destroying method, this method such as heat resolves, can be real The recycling of existing residual ozone.

To sum up, using the utility model catalytic ozonation technology as percolate the depth science and engineering after evaporating gas washing Skill, can overcome that complex technical process existing for traditional advanced treatment process, operating cost are high, treatment effect is unstable etc. asks Topic, further optimizes effluent quality of the percolate after evaporating gas washing, and water outlet can reach《Consumer waste filling and embedding pollutant control Standard processed》Emission request in GB16889-2008.

Brief description of the drawings

Fig. 1 is the structural representation that the utility model percolate evaporates advanced treatment system after gas washing.

1. carry out liquid delivery pump；2. measuring pump；3. pipe-line mixer；4. on-line pH value detector；5. water-locator；6. titanium is aerated Head；7. stainless steel filter head；8. wire packing layer；9. catalyst filling layer；10. catalytic tower；11. three phase separator；12. system Oxygen machine；13. ozone generator；14. exhaust collection pond

Embodiment

The utility model is further illustrated with reference to embodiments：

Embodiment 1

Present embodiment discloses advanced treatment system after a kind of percolate evaporation gas washing, its structure is as shown in figure 1, bag Acid-base accommodation system and catalytic oxidation system are included, the acid-base accommodation system includes coming liquid delivery pump 1, measuring pump 2, pipeline mixing Device 3 and on-line pH value detector 4, it is described come liquid delivery pump 1 outlet and measuring pump 2 export respectively with the entrance of pipe-line mixer 3 company Logical, the on-line pH value detector 4 is arranged on the export pipeline of pipe-line mixer 3, the on-line pH value detector 4 and measuring pump 2 Electricity Federations；

The catalytic oxidation system includes catalytic tower 10, oxygenerator 12, ozone generator 13, exhaust collection pond 14, The bottom liquid inlet of catalytic tower 10 and the outlet of pipe-line mixer 3, the bottom gas of catalytic tower 10 enter Mouth and the outlet of ozone generator 13, the entrance of ozone generator 13 connect with oxygenerator 12, the catalytic tower 10 Top gas outlet connects with exhaust collection pond 14, is provided with water-locator 5 inside the catalytic tower 10 from bottom to top, titanium exposes Gas is first 6, stainless steel filter head 7, wire packing layer 8, catalyst filling layer 9 and three phase separator 11.

Method using the present embodiment system depth processing percolate evaporation gas washing comprises the following steps：

(1) acid-base accommodation system：Water inlet is delivered to pipe-line mixer 3 through carrying out liquid delivery pump 1, and the pipe-line mixer will enter Water is quickly mixed with 20% sodium hydroxide solution added by measuring pump 2, and water inlet pH value is adjusted to 8.5~9, by online PH value detector 4 feeds back the rotating speed that electric signal automatically controls the measuring pump 2, automatically adjusts 20% sodium hydroxide solution Dosage.

(2) catalytic oxidation system：Water inlet after being handled by step (1) is entered by the bottom of catalytic tower 10, passes through water distribution Device 5 will intake it is dispersed after, the ozone with entering from the bottom of catalytic tower 10 is sufficiently mixed, in catalyst filling layer Under 9 catalytic action, ozone is by the organic pollution oxidation Decomposition in water inlet into CO₂And H₂Described in O, water outlet and residual ozone warp Leave at the top of catalytic tower 10.Inflow temperature is 25~30 DEG C, and upper speed is 2m/h, residence time 2h.

Ozone is prepared using oxygenerator 12 and ozone generator 13, utilizes the high-purity oxygen of oxygenerator 12 Gas, the oxygen is passed through in the ozone generator 13, and the oxygen is converted into ozone, and the ozone concentration produced is 100mg/L.By adjusting the oxygen flow, ozone air inflow is adjusted.

Water inlet passes through titanium aeration head 6, stainless steel filter head 7, wire packing layer 8 and catalyst filling layer 9 successively with ozone, right The bubble that the ozone is formed is cut step by step, ensures that the water inlet is sufficiently mixed with microbubble, ozone utilization rate is up to 90%.It is described water inlet by the titanium aeration head when with the ozone caused by micro-bubble contact fusion and react, institute State titanium aeration head a diameter of 180mm, throughput 35-40m³/ h, the pressure loss are not more than 4kPa；Through titanium aeration head mixing Air-water mixture in uphill process bubble with pressure reduce and microbubble merge into each other and become larger, the stainless steel filter head Larger rising bubble is cut, ensures that described air-water mixture mix uniformly；The air-water mixture passes through By the wire packing layer and the catalyst filling layer, the wire packing main function it is to described smelly after uniform again The bubble that oxygen is formed is cut again, it is ensured that the air-water mixture uniformly enters the catalyst filling layer, improves smelly Coefficient of oxygen utilization, prevent short flow phenomenon from occurring.The wire packing layer is made using 0.23-0.25mm 304 material filaments, filling Thickness 150mm.

In the catalyst filling layer 9, catalyst model LTM-W, filling rate 11%, during use without changing.

Water outlet, ozone are separated by three phase separator 11, and water outlet is flowed out from the delivery port of catalytic tower 10, residual After-odour oxygen overflows from the top of catalytic tower 10, while the three phase separator 11 can play the retention catalyst filling The effect of solid catalyst, prevents its loss in layer 9.The residual ozone flow to exhaust collection pond 14, and tolerance is about that ozone enters The 10% of tolerance.

Described exhaust collection pond 14 is percolate stoste regulating reservoir, organic using residual ozone degraded part Pollutant, reduce subsequent treatment load, the harm and influence for effectively controlling residual ozone to bring surrounding environment.

The deep treatment method of the present embodiment has that technology chain is short, stable, treatment effeciency is high, floor space is small, nothing The features such as secondary pollution, percolate is handled through evaporating gas washing processing water outlet using the utility model technology, water outlet It can reach《Consumer waste filling and embedding pollutant catabolic gene standard》Emission request in GB16889-2008.

Finally it should be noted that：Various embodiments above is only to illustrate the technical solution of the utility model, rather than it is limited System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should Understand：It can still modify to the technical scheme described in foregoing embodiments, either to which part or whole Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly The scope of each embodiment technical scheme of type.

Claims (4)

1. advanced treatment system after a kind of percolate evaporation gas washing, it is characterised in that including acid-base accommodation system and catalysis Oxidative system, the acid-base accommodation system include coming liquid delivery pump, measuring pump, pipe-line mixer and on-line pH value detector, institute State to carry out liquid conveying pump discharge and measure pump discharge and connected respectively with pipe-line mixer entrance, the on-line pH value detector is arranged on On pipe-line mixer export pipeline, the on-line pH value detector and measuring pump Electricity Federation；

The catalytic oxidation system includes catalytic tower, oxygenerator, ozone generator, exhaust collection pond, the catalytic reaction Tower bottom liquid inlet and pipe-line mixer outlet, the catalytic tower bottom gas inlet and ozone generator outlet Connection, the ozone generator entrance connect with oxygenerator, and the catalytic tower top gas outlet connects with exhaust collection pond It is logical, water-locator, titanium aeration head, stainless steel filter head, wire packing layer, catalysis are provided with inside the catalytic tower from bottom to top Agent packing layer and three phase separator.

2. advanced treatment system after percolate evaporation gas washing according to claim 1, it is characterised in that the titanium aeration A diameter of 180mm, throughput 35-40m³/ h, the pressure loss are not more than 4kPa；The wire packing layer uses 0.23- 0.25mm 304 material filaments make, filling thickness 150mm.

3. advanced treatment system after percolate evaporation gas washing according to claim 1, it is characterised in that the catalyst Catalyst model LTM-W in packing layer, filling rate 11%.

4. advanced treatment system after percolate evaporation gas washing according to claim 1, it is characterised in that exhaust collection pond For percolate stoste regulating reservoir.