CN102992418A - Multiphase flow rotation foam separation device and waste water/ gas treatment technology using same - Google Patents
Multiphase flow rotation foam separation device and waste water/ gas treatment technology using same Download PDFInfo
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- CN102992418A CN102992418A CN2012104836206A CN201210483620A CN102992418A CN 102992418 A CN102992418 A CN 102992418A CN 2012104836206 A CN2012104836206 A CN 2012104836206A CN 201210483620 A CN201210483620 A CN 201210483620A CN 102992418 A CN102992418 A CN 102992418A
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Abstract
The invention discloses a multiphase flow rotation foam separation device and a waste water/gas treatment technology using the device. The technology and the device are used for high-ammonia nitrogen sewage treatment, can be used for replacing the conventional technologies such as aerobiotic aeration, steam stripping, air stripping and the like and have the advantages that the upper limit concentration is not limited, the ammonia nitrogen removal rate is more than 95%, and the chemical oxygen demand (COD) cr removal rate is more than 98%. The device has multiple functions such as ammonia nitrogen dissociation reaction, air stripping and ammonia recovery, thus being capable of easily completing high-ammonia nitrogen waste liquid full-loop operation in a matching way and realizing 'zero emission' in deed. The device can be used for treating various industrial flue gases with high temperature, high sulfur, high humidity and high dust content, integrates the functions of cooling, desulfurating and dust removing, and has the desulfurization rate being more than 90% and the dust removal rate being more than 99%; and after multiple stages of multiphase flow rotation foam separation devices are connected in series, the effect of electric precipitation can be achieved, but the project investment and energy consumption are far lower than those of electric precipitation.
Description
Technical field
The present invention relates to a kind of technique of processing waste water and waste gas with polyphasic flow rotation foam separating technology and equipment in field of environment engineering.
Background technology
The sewage treatment process type that present China adopts mainly contains following several: traditional active sludge treatment process, adsorption biodegradation, A/O and A2/O technique, Hydrolysis-aerobic Process, oxidation ditch process, SBR and modification technique thereof, biological aerated filter process, Biological Contact Oxidation Process, oxidation pond, BIOLAK and soil treatment process.Development along with the sewage disposal cause, existing multiple sewage treatment process has obtained application in wastewater treatment in China factory, wherein with A/O, A2/O and deformation technique thereof, oxidation ditch, SBR and modification technique thereof are main, other technique such as adsorption biodegradation, BAF, Hydrolysis-aerobic Process, Biological Contact Oxidation Process, stabilization pond, BIOLAK technique, the sewage treatment process such as wetland processing also have the application of certain scale, but which kind of technique is necessary large-area sewage lagoon or wetland all, need to add and join special-purpose aeration and auxiliary sedimentation device, if need to add treatment agent, also need other to add and whipping appts by dose out powders, the Construction and operation expense is high, floor space is large, and the problems such as secondary treatment of discharging mud, and for supersalinity, (〉=ammonia nitrogen 600mg/L) or the processing of complicated organic waste water are still helpless for high density.
Domestic existing industrial smoke is processed and is mainly contained numb stone membrane process, spray method, and the desulfurizing industrial fume dust removal process techniques such as cloth bag, electrostatic precipitation, energy consumption is high, efficient is low, or efficient is high, investment is large, especially in the face of the flue gas of high temperature, high humidity, high-sulfur, high dustiness, difficult especially.
Summary of the invention
The objective of the invention is to overcome the deficiency on the prior art, provide a kind of polyphasic flow rotation foam separating technology to process the technique of waste water and gas.
Technical scheme of the present invention is, a kind of polyphasic flow rotation foam separator,
At circulation groove wave duct and tail gas absorption tube are housed, gas-liquid-solid three-phase are housed in circulation groove separate dividing plate, the rotating fluid nozzle is housed in wave duct, industrial filler or sorbent material are housed in the tail gas absorption tube; The airduct of blower fan connects wave duct; At circulation groove liquid phase entrance, charging opening, wash water valve and recycle valve are arranged, the water inlet pipe of recycle pump connects recycle valve, and rising pipe connects the rotating fluid nozzle; Be connected with the liquid-phase outlet valve at recycle valve; At the tail gas absorption tube absorption agent charging opening and the outlet of liquid phase by product are arranged.
Rotating fluid nozzle in wave duct arranges more than 2.
Outlet at the tail gas absorption tube is connected to induced draft fan.
At circulation groove liquidometer is housed.
A kind of technique of processing waste water with polyphasic flow rotation foam separator:
1), at first starts blower fan (8) air is imported the wave duct that polyphasic flow rotates foam separator, close simultaneously the liquid-phase outlet valve of circulation groove;
2), waste water is delivered to the circulation groove of polyphasic flow rotation foam separator through liquid phase entrance (9), the waste water of through recycle pump wish being processed is again delivered to the rotating fluid nozzle of wave duct, with the direct counter current contact of air that imports through blower fan, and control flow, make vapour-liquid ratio in 100～500 scopes, gas-phase pressure drop is at 30～300mmH
2In the O scope, make it to produce the foam layer of high speed rotating;
3), the charging opening by circulation groove adds sewage-treating agent;
4), open absorption agent charging opening and the by product outlet of tail gas absorption tube, the liquid level of control liquidometer (13) is at 2/3rds to 3/4ths places, sampling detects the ammonia nitrogen value of sewage in the groove, if below standard, then close the liquid phase entrance, by sewage in the recycle pump circular treatment circulation groove, until hit the target, then open the liquid-phase outlet valve and discharge, open simultaneously the liquid phase entrance, and make import and export keep flow equilibrium.
5, a kind of technique of processing waste gas with polyphasic flow rotation foam separator:
1), through induced draft fan high-temp waste gas is imported wave duct, directly contacts with the overflow liquid film of wave duct temperature descending section, absorb its sensible heat cooling through thin film evaporation;
2) desulfurization and denitrification reaction liquid is delivered to the circulation groove that polyphasic flow rotates foam separator through the liquid phase entrance, through recycle pump absorption reaction liquid is delivered to again the rotating fluid nozzle of wave duct, with the direct counter current contact of flue gas after the cooling, and control flow, make vapour-liquid ratio in 500～2000 scopes, gas-phase pressure drop is at 50～500mmH
2In the O scope, make it to produce the foam layer of high speed rotating;
3), by the absorption agent charging opening to tail gas absorption tube filling absorption agent, and open auxiliary product outlet, control liquidometer liquid level is at 1/2nd to 2/3rds places.
4) processed flue gas is finished double absorption through the tail gas absorption tube, enters induced draft fan again after built-in mist eliminator foam removal and sends into smoke stack emission.
The present invention has following technique effect, and 1, normal-temperature operation, can efficiently finish the whole process of ammonia-nitrogen desorption; 2, vapour-liquid ratio little (usually can not surpass 200) can significantly reduce the stripping energy consumption; 3, be used for ammonia-nitrogen sewage and process, free and the resolving of ammonia can be carried out synchronously, can in time be obtained separation and leave liquid phase by the free ammonia of stripping, impel reaction process to carry out to positive dirction all the time, to obtain higher ammonia nitrogen removal frank; 4, the ammonia that is separated by stripping can reclaim synchronously, and can become desired product in the tail gas absorption tube, can not cause secondary pollution to atmospheric environment; 5, the reaction-separation function of the liquid-solid three-phase flow of this device gas collection together, be applicable to the reaction and separation processes mass transfer process between any gas-liquid, the liquid-solid gentle solid phase, both can be used as the polyphasic flow reactor, also can be used as separator or the crystallizer of absorption, parsing and desulfurization, dedusting, and high mass transfer and separation efficiency are arranged; 6, corollary apparatus is interior without any dynamic component, also without the internals that easily produce dead angle, channel, is difficult for stopping up stable operation; 7, adopt this technique, installed capacity is little, and processing cost is lower; 8, corollary apparatus integrates multiple function, so volume is little, and floor space is few, and project investment is few; 9, the technology is to the ammonia-nitrogen content no maximum in waste water restriction, and operating procedure is not subjected to the restriction of the dopant species such as acid-alkali salt in the waste water and concentration yet, and is applied widely; 10, the design of this process technologies is open, can use with other sewage of other any types and exhaust gas treatment technology and process combination, to reach the optimum handling effect, realize qualified discharge, or finish green recycle to extinction technique realization " zero release " truly; 11, this technique and corresponding support equipment, the all types of industries flue gas that also can be used for high temperature, high-sulfur, high humidity, high dustiness is processed, can integrate cooling, desulfurization, dedusting, desulfurization degree can reach more than 90%, dust removal efficiency can reach more than 99%, plural serial stage then can reach the effect of electric precipitation, and project investment and energy consumption then will be far below electric precipitations.
Description of drawings
Fig. 1 is that the present invention is for the treatment of the structural representation of the polyphasic flow rotation foam separator of waste water.
Fig. 2 is that the present invention is for the treatment of the structural representation of the polyphasic flow rotation foam separator of waste gas.
Embodiment
As shown in Figure 1, a kind of polyphasic flow rotation foam separator:
At circulation groove 3 wave duct 1 and tail gas absorption tube 5 are housed, gas-liquid-solid three-phase are housed in circulation groove 3 separate dividing plate 4, rotating fluid nozzle 2 is housed in wave duct 1, industrial filler or sorbent material 6 are housed in tail gas absorption tube 5; The airduct of blower fan 8 connects wave duct 1; At circulation groove 3 liquid phase entrance 9, charging opening 10, wash water valve 13 and recycle valve 14 are arranged, the water inlet pipe of recycle pump 7 connects recycle valve 14, and rising pipe connects rotating fluid nozzle 2; Be connected with liquid-phase outlet valve 15 at recycle valve 14; At tail gas absorption tube 5 absorption agent charging opening 11 and liquid phase by product outlet 12 are arranged, rotating fluid nozzle 2 in wave duct 1 arranges more than 2, but the cluster use, or the multilevel device series connection is used, to change duration of contact and the sewage load of gas-liquid two-phase, at circulation groove 3 liquidometer 16 is housed.
As shown in Figure 2, a kind of polyphasic flow rotation foam separator:
At circulation groove 3 wave duct 1 and tail gas absorption tube 5 are housed, gas-liquid-solid three-phase are housed in circulation groove 3 separate dividing plate 4, rotating fluid nozzle 2 is housed in wave duct 1, industrial filler or sorbent material 6 are housed in tail gas absorption tube 5; The airduct of blower fan 8 connects wave duct 1; At circulation groove 3 liquid phase entrance 9, charging opening 10, wash water valve 13 and recycle valve 14 are arranged, the water inlet pipe of recycle pump 7 connects recycle valve 14, and rising pipe connects rotating fluid nozzle 2; Be connected with liquid-phase outlet valve 15 at recycle valve 14; At tail gas absorption tube 5 absorption agent charging opening 11 and liquid phase by product outlet 12 are arranged, rotating fluid nozzle 2 in wave duct 1 arranges more than 2, but the cluster use, or the multilevel device series connection is used, to change duration of contact and the sewage load of gas-liquid two-phase, at circulation groove 3 liquidometer 16 is housed; Outlet at tail gas absorption tube 5 is connected to induced draft fan 17.
Embodiment 1:
Middle salt collective strain Xiang space project
Hydrazine hydrate waste water project, day output: 500t/d,
Import ammonia nitrogen: 6320mg/L, import CODcr:34600mg/L
Outlet ammonia nitrogen: 168mg/L, outlet CODcr:1600mg/L
Final outflow water flows to: send head factory sewage disposal master station, finish ultimate processing after, qualified discharge.
1), at first starts blower fan 8 air is imported the wave duct 1 that polyphasic flow rotates foam separator, close simultaneously the liquid-phase outlet valve 15 of circulation groove 3;
2), sewage is delivered to the circulation groove 3 of polyphasic flow rotation foam separator through liquid phase entrance 9, the waste water of through recycle pump 7 wish being processed is again delivered to the rotating fluid nozzle 2 of wave duct 1, with the direct counter current contact of air that imports through blower fan 8, and control flow, make vapour-liquid ratio in 100～500 scopes, gas-phase pressure drop is at 30～300mmH
2In the O scope, make it to produce the foam layer of high speed rotating;
3), the charging opening 10 by circulation groove adds sewage-treating agent strong oxidizer degraded hydrazine hydrate;
4), open absorption agent charging opening 11 and the by product outlet 12 of tail gas absorption tube 5, the liquid level of control liquidometer 13 is at 2/3rds to 3/4ths places, sampling detects the ammonia nitrogen value of sewage in the groove, if below standard, then close liquid phase entrance 9, by recycle pump 7 circular treatment circulation grooves 3 interior sewage, until hit the target, then open liquid-phase outlet valve 15 and discharge, open simultaneously liquid phase entrance 9, and make import and export keep flow equilibrium.
Adopt three grades of polyphasic flows rotation foam separators that sewage is carried out stripping, after qualified below the 1580mg/L, be pumped to little electrolysis tower through little solution until the free ammonia stripping, to finish the advanced treatment process of sewage decoloring and COD, COD is down to below the 8000mg/L.The sewage that goes out little electrolysis tower enters circulatory pool, be down to below the 3200mg/L to 500mg/L, COD through the wave duct stripping ammonia nitrogen of second stage polyphasic flow rotation foam separator again, the wave duct that the outlet liquid phase is delivered to third stage polyphasic flow rotation foam separator through recycle pump continues stripping residue ammonia nitrogen, after reaching re-set target 200mgL, COD and being down to the sewage disposal master station that delivers to head factory behind the 1800mg/L and doing last comprehensive treating process, qualified discharge.
Embodiment 2
Sea, Hengyang connection bittern chemical project
Solvay liquor recycle to extinction project, day output: 900t/d, 74 ℃ of deamination temperature
The import waste liquid forms:
NaHCO
3：10.12gL，NaCl：64.26g/L，Na
2SO
4：20.84g/L，
NH
4HCO
3：74.66gL，NH
4Cl：187.48g/L；
The outlet waste liquid forms:
NaHCO
3：9.28gL，NaCl：64.15gL，Na
2SO
4：20.72gL，
NH
4HCO
3：11.92gL，NH
4Cl：184.38gL；
Waste material liquid is delivered to interchanger through sewage and is warming up to desired temperature, to decomposite the C in the feed liquid
2O and free ammonia, and then deliver to the polyphasic flow rotation foam separator stripping of first step parallel connection, make NH
4HCO
3Content be down to below 30%, qualifiedly deliver to second stage polyphasic flow rotation foam separator stripping by feed pump, make NH
4HCO
3Content be down to below 10%, otherwise deliver to second stage polyphasic flow rotation foam separator circular treatment through recycle pump.The outlet liquid phase of second stage polyphasic flow rotation foam separator is delivered to the wave duct continuation stripping residue ammonia nitrogen of third stage polyphasic flow rotation foam separator again through feed pump, reach re-set target NH
4HCO
3Content be down to below 5% after, after feed pump is delivered to ammonium chloride workshop evaporation concentration as byproduct.At different levels by the free ammonia of stripping and CO
2In offgas duct, use from after the absorbing without ammoniated brine of saline slot and be reduced to again NH
4HCO
3, and be collected in separately in the saline slot, send the alkaline workshop back to as raw material through brinepump again, finish the extinction recycle operation technique that solvay liquor is processed.
Embodiment 3
Changsha Sheng Xi manganese industry project
Electrolytic Manganese Wastewater day output: 120t/d, technological design: three grades of single tube stripping+sepiolite absorption
Import ammonia nitrogen: 3260mg/L, ammonia absorption tower outlet ammoniacal liquor titre: 29.2tt
Outlet ammonia nitrogen: one-level 689mg/L, secondary: 366mg/L, three grades: 105mg/L;
Sepiolite adsorption tower outlet: 12.8mg/L.
The polyphasic flow rotation foam separator that the sewage that drains into sewage lagoon is delivered to first step parallel connection through recycle pump alternately, stripping intermittently, control simultaneously pH value about 11.Until the free ammonia stripping after below the 800mg/L, deliver to second stage polyphasic flow rotation in parallel foam separator stripping ammonia nitrogen to 150mg/L through feed pump, deliver to sepiolite adsorption tower absorption residue ammonia nitrogen through feed pump again, reach the following rear qualified discharge of re-set target 15mg/L.Sepiolite in the adsorption tower can be regenerated after with the water purification back flushing, and wash-down water drains into sewage lagoon.
Embodiment 4
Rong company of Jiangxi section high temperature, high humidity, high cloud of dust gas dust removal process project
Flue gas treatment capacity: 50000m
3/ h, design technology: secondary is two-tube+preposition cooling
Flue-gas temperature: 1600 ℃, dustiness: 24200mg/m
3,
Exit gas temperature: 48 ℃, dustiness: 148.2mg/m
3, dust removal efficiency: 99.4%
Adopt secondary polyphasic flow rotation foam separator that flue gas is carried out stripping.
1), will import from about 2000 ℃ high-temperature flue gas of the kiln of smelting kiln stove the wave duct 1 of polyphasic flow rotation foam separator through induced draft fan 8, directly contact with the overflow liquid film of wave duct 1 temperature descending section, absorb its sensible heat cooling through thin film evaporation;
2) desulfurization and denitrification reaction liquid is delivered to the circulation groove 3 that polyphasic flow rotates foam separator through liquid phase entrance 9, through recycle pump 7 absorption reaction liquid is delivered to again the rotating fluid nozzle 2 of wave duct 1, with the direct counter current contact of flue gas after the cooling, and control flow, make vapour-liquid ratio in 500～2000 scopes, gas-phase pressure drop is at 50～500mmH
2In the O scope, make it to produce the foam layer of high speed rotating;
3), by absorption agent charging opening 10 to tail gas absorption tube 5 filling absorption agents, and open auxiliary product outlet 12, control liquidometer 13 liquid levels are at 1/2nd to 2/3rds places.
4) processed flue gas is finished double absorption through tail gas absorption tube 5, enters induced draft fan 17 again after built-in mist eliminator foam removal and sends into smoke stack emission.
About 2000 ℃ high-temperature flue gas from the kiln of smelting kiln contacts with the foam layer of rotation standing wave after the wave duct temperature descending section of first step polyphasic flow rotation foam separator cools off again, makes dust content be down to 2500mg/m
3Below, again through the offgas duct final dusting, make dust content be down to 800mg/m
3Below, then import again second stage polyphasic flow rotation foam separator through induced draft fan, make dust content be down to 200mg/m
3Below, finish the task of last qualified discharge, the combined dust-eliminating rate of secondary polyphasic flow rotation foam dedusting system can reach more than 99%.By second stage polyphasic flow rotation foam separator offgas duct flue gas up to standard out, after the carbonated drink knockout tower is removed the liquid phase mist, directly deliver to smoke stack emission by induced draft fan.
Claims (6)
1. a polyphasic flow rotates foam separator, it is characterized in that:
At circulation groove (3) wave duct (1) and tail gas absorption tube (5) are housed, gas-liquid-solid three-phase is housed in circulation groove (3) separates dividing plate (4), rotating fluid nozzle (2) is housed in wave duct (1), industrial filler or sorbent material (6) are housed in tail gas absorption tube (5); The airduct of blower fan (8) connects wave duct (1); At circulation groove (3) liquid phase entrance (9), charging opening (10), wash water valve (13) and recycle valve (14) are arranged, the water inlet pipe of recycle pump (7) connects recycle valve (14), and rising pipe connects rotating fluid nozzle (2); Be connected with liquid-phase outlet valve (15) at recycle valve (14); At tail gas absorption tube (5) absorption agent charging opening (11) and liquid phase by product outlet (12) are arranged.
2. a kind of polyphasic flow according to claim 1 rotates foam separator, and it is characterized in that: the rotating fluid nozzle (2) in wave duct (1) arranges more than 1.
3. a kind of polyphasic flow according to claim 1 rotates foam separator, and it is characterized in that: the outlet at tail gas absorption tube (5) is connected to induced draft fan (17).
4. a kind of polyphasic flow rotation foam separator according to claim 1 is characterized in that: at circulation groove (3) liquidometer (16) is housed.
5. process the technique of waste water with polyphasic flow rotation foam separator for one kind, it is characterized in that:
1), at first starts gas blower (8) air is sent into the wave duct (1) that polyphasic flow rotates foam separator, close simultaneously the liquid-phase outlet valve (15) of circulation groove (3);
2), waste water is delivered to the circulation groove (3) of polyphasic flow rotation foam separator through liquid phase entrance (9), the waste water of through recycle pump (7) wish being processed is again delivered to the rotating fluid nozzle (2) of wave duct (1), with the direct counter current contact of air of sending into through blower fan (8), and control flow, make vapour-liquid ratio in 100～500 scopes, gas-phase pressure drop is at 30～300mmH
2In the O scope, make it to produce the foam layer of high speed rotating;
3), the charging opening (10) by circulation groove adds sewage-treating agent;
4), open absorption agent charging opening (11) and the by product outlet (12) of tail gas absorption tube (5), the liquid level of control liquidometer (13) is at 2/3rds to 3/4ths places, sampling detects the ammonia nitrogen value of sewage in the groove, if below standard, then close liquid phase entrance (9), by the interior sewage of recycle pump (7) circular treatment circulation groove (3), until hit the target, then open liquid-phase outlet valve (15) and discharge, open simultaneously liquid phase entrance (9), and make import and export keep flow equilibrium.
6. process the technique of waste gas with polyphasic flow rotation foam separator for one kind, it is characterized in that:
1), through induced draft fan (8) high-temp waste gas is imported the wave duct (1) of polyphasic flow rotation foam separator, directly contacts with the overflow liquid film of wave duct (1) temperature descending section, absorb its sensible heat cooling through thin film evaporation;
2) desulfurization and denitrification reaction liquid is delivered to the circulation groove (3) that polyphasic flow rotates foam separator through liquid phase entrance (9), through recycle pump (7) absorption reaction liquid is delivered to again the rotating fluid nozzle (2) of wave duct (1), with the direct counter current contact of flue gas after the cooling, and control flow, make vapour-liquid ratio in 500～2000 scopes, gas-phase pressure drop is at 50～500mmH
2In the O scope, make it to produce the foam layer of high speed rotating;
3), by absorption agent charging opening (11) to tail gas absorption tube (5) filling absorption agent, and open auxiliary product outlet (12), control liquidometer (13) liquid level is at 1/2nd to 2/3rds places.
4) processed flue gas is finished double absorption through tail gas absorption tube (5), enters induced draft fan (8) again and send into chimney (17) discharging after tail gas absorption tube (5) foam removal.
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|---|---|---|---|
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| CN103663804A (en) * | 2013-12-12 | 2014-03-26 | 扬州大学 | Method for ferrum-carbon micro-electrolysis pretreatment of wastewater containing hydrazine and derivatives thereof |
| CN104229991A (en) * | 2014-08-26 | 2014-12-24 | 常州大学 | Device for processing high-concentration ammonia nitrogen in chemical wastewater by using surface active catalyst |
| CN105833567A (en) * | 2016-06-13 | 2016-08-10 | 江苏海事职业技术学院 | Intelligent oil-water separator for ships |
| CN107352701A (en) * | 2017-09-14 | 2017-11-17 | 周大军 | A kind of high-ammonia-nitrogen sewage processing cycle pond and sewage-treatment plant and its handling process with circulatory pool |
| CN110075554A (en) * | 2019-05-08 | 2019-08-02 | 上海蓝滨石化设备有限责任公司 | A kind of concatenated multi-fluid reboiler in still dome |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103663804A (en) * | 2013-12-12 | 2014-03-26 | 扬州大学 | Method for ferrum-carbon micro-electrolysis pretreatment of wastewater containing hydrazine and derivatives thereof |
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| CN110075554A (en) * | 2019-05-08 | 2019-08-02 | 上海蓝滨石化设备有限责任公司 | A kind of concatenated multi-fluid reboiler in still dome |
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