CN102992418B - 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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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 by polyphasic flow rotation foam separating technology and the technique of equipment at field of environment engineering processing waste water and waste gas.
Background technology
The sewage treatment process type that China adopts at present 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 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 is 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 another dose out powders to add and whipping appts, Construction and operation expense is high, floor space is large, and the problems such as secondary treatment of discharging mud, and for supersalinity, the ammonia nitrogen of high density (>=600mg/L) or the processing of complicated organic waste water are still helpless.
Domestic existing industrial smoke is processed and is mainly contained numb stone membrane process, spray method, and the desulfurizing industrial fume dust removal process technique such as cloth bag, electrostatic precipitation, energy consumption is high, efficiency is low, or efficiency is high, investment 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 object of the invention is to overcome the deficiency in 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,
Wave duct and tail gas absorption tube are housed on circulation groove, the separated dividing plate of gas-liquid-solid three-phase is housed in circulation groove, rotating fluid nozzle is housed in wave duct, industrial filler or absorption agent are housed in tail gas absorption tube; The airduct of gas blower connects wave duct; On circulation groove, have liquid phase entrance, charging opening, wash water valve and recycle valve, the water inlet pipe of recycle pump connects recycle valve, and rising pipe connects rotating fluid nozzle; On recycle valve, be connected with liquid-phase outlet valve; On tail gas absorption tube, there are absorption agent charging opening and the outlet of liquid phase by product.
Rotating fluid nozzle in wave duct arranges more than 2.
Outlet at tail gas absorption tube is connected to induced draft fan.
Liquidometer is housed on circulation groove.
A kind of technique of processing waste water with polyphasic flow rotation foam separator:
1), first start gas blower and air is imported to the wave duct of polyphasic flow rotation foam separator, close the liquid-phase outlet valve of circulation groove simultaneously;
2), waste water is delivered to the circulation groove of polyphasic flow rotation foam separator through liquid phase entrance, 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 importing through gas blower, and control flow, make vapour-liquid ratio in 100～500 scopes, gas-phase pressure drop is at 30～300mmH
2within the scope of O, 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 outlet of liquid phase by product of tail gas absorption tube, control the liquid level of liquidometer at 2/3rds to 3/4ths places, sampling detects the ammonia nitrogen value of sewage in groove, if below standard, close liquid phase entrance, by sewage in recycle pump circular treatment circulation groove, until hit the target, then open liquid-phase outlet valve and discharge, open liquid phase entrance simultaneously, and make import and export maintain flow equilibrium.
5, a kind of technique of processing waste gas with polyphasic flow rotation foam separator:
1), through gas blower, high-temp waste gas is imported to wave duct, directly contact with the overflow liquid film of wave duct temperature descending section, through thin film evaporation, absorb its sensible heat cooling;
2) desulfurization and denitrification reaction liquid is delivered to the circulation groove of polyphasic flow rotation foam separator through liquid phase entrance, through recycle pump, absorption reaction liquid is delivered to again to the rotating fluid nozzle of wave duct, with the direct counter current contact of flue gas after cooling, and control flow, make vapour-liquid ratio in 500～2000 scopes, gas-phase pressure drop is at 50～500mmH
2within the scope of O, make it to produce the foam layer of high speed rotating;
3), by absorption agent charging opening to tail gas absorption tube filling absorption agent, and open the outlet of liquid phase liquid by product, control liquidometer liquid level at 1/2nd to 2/3rds places.
4) processed flue gas completes double absorption through tail gas absorption tube, then after built-in mist eliminator foam removal, enters induced draft fan and send into smoke stack emission.
The present invention has following technique effect, and 1, normal-temperature operation, can efficiently complete the whole process of ammonia-nitrogen desorption; 2, vapour-liquid ratio little (conventionally can not surpass 200), can significantly reduce stripping energy consumption; 3, for ammonia-nitrogen sewage, process, the free of ammonia can be synchronizeed and carry out with resolving, by the free ammonia of stripping, can be obtained separation in time and leave liquid phase, impels reaction process to positive dirction, to carry out all the time, to obtain higher ammonia nitrogen removal frank; 4, by the ammonia of stripping separation, can synchronously be reclaimed, and can in tail gas absorption tube, become desired product, can not cause secondary pollution to atmospheric environment; 5, the reaction-separation function of this device collection gas-liquid-solid three phase flow together, be applicable to the reaction and separation processes mass transfer process between any gas-liquid, liquid-solid gentle solid phase, both can be used as polyphasic flow reactor, also can be used as separator or the crystallizer of absorption, parsing and desulfurization, dedusting, and have high mass transfer and separation efficiency; 6, corollary apparatus is interior without any dynamic component, also, without easily producing the internals of 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 restriction in waste water, and operating procedure is not subject to the restriction of the dopant species such as acid-alkali salt in waste water and concentration yet, 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 optimum handling effect, realize qualified discharge, or complete green recycle to extinction technique realization " zero release " truly; 11, this technique and corresponding support equipment, also all types of industries flue gas that 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 can reach the effect of electric precipitation, and project investment and energy consumption will be far below electric precipitations.
Accompanying drawing explanation
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:
Wave duct 1 and tail gas absorption tube 5 are housed on circulation groove 3, the separated dividing plate 4 of gas-liquid-solid three-phase is housed in circulation groove 3, 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 gas blower 8 connects wave duct 1; On circulation groove 3, have liquid phase entrance 9, charging opening 10, wash water valve 13 and recycle valve 14, the water inlet pipe of recycle pump 7 connects recycle valve 14, and rising pipe connects rotating fluid nozzle 2; On recycle valve 14, be connected with liquid-phase outlet valve 15; On tail gas absorption tube 5, there are absorption agent charging opening 11 and liquid phase by product outlet 12, rotating fluid nozzle 2 in wave duct 1 arranges more than 2, can use by cluster, or multilevel device series connection is used, to change duration of contact and the sewage load of gas-liquid two-phase, liquidometer 16 is housed on circulation groove 3.
As shown in Figure 2, a kind of polyphasic flow rotation foam separator:
Wave duct 1 and tail gas absorption tube 5 are housed on circulation groove 3, the separated dividing plate 4 of gas-liquid-solid three-phase is housed in circulation groove 3, 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 gas blower 8 connects wave duct 1; On circulation groove 3, have liquid phase entrance 9, charging opening 10, wash water valve 13 and recycle valve 14, the water inlet pipe of recycle pump 7 connects recycle valve 14, and rising pipe connects rotating fluid nozzle 2; On recycle valve 14, be connected with liquid-phase outlet valve 15; On tail gas absorption tube 5, there are absorption agent charging opening 11 and liquid phase by product outlet 12, rotating fluid nozzle 2 in wave duct 1 arranges more than 2, can use by cluster, or multilevel device series connection is used, to change duration of contact and the sewage load of gas-liquid two-phase, liquidometer 16 is housed on circulation groove 3; Outlet at tail gas absorption tube 5 is connected to induced draft fan.
Embodiment 1:
Zhong Yan 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, complete after ultimate processing qualified discharge.
1), first start gas blower 8 and air is imported to the wave duct 1 of polyphasic flow rotation foam separator, close the liquid-phase outlet valve 15 of circulation groove 3 simultaneously;
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 importing through gas blower 8, and control flow, make vapour-liquid ratio in 100～500 scopes, gas-phase pressure drop is at 30～300mmH
2within the scope of O, 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 liquid phase by product outlet 12 of tail gas absorption tube 5, control the liquid level of liquidometer 16 at 2/3rds to 3/4ths places, sampling detects the ammonia nitrogen value of sewage in groove, if below standard, 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 liquid phase entrance 9 simultaneously, and make import and export maintain flow equilibrium.
Adopt three grades of polyphasic flows rotation foam separators to carry out stripping to sewage, until free ammonia stripping, to after qualified below 1580mg/L, through micro-solution, be pumped to micro-electrolysis tower, to complete the advanced treatment process of sewage decoloring and COD, COD is down to below 8000mg/L.The sewage that goes out micro-electrolysis tower enters circulatory pool, through the wave duct stripping ammonia nitrogen of second stage polyphasic flow rotation foam separator, be down to below 3200mg/L to 500mg/L, COD again, the wave duct that outlet liquid phase is delivered to third stage polyphasic flow rotation foam separator through recycle pump continues stripping residue ammonia nitrogen, reach re-set target 200mg/L, COD and be down to the sewage disposal master station that delivers to head factory after 1800mg/L and do after 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
Import waste liquid forms:
NaHCO
3：10.12g/L，NaCl：64.26g/L，Na
2SO
4：20.84g/L，
NH
4HCO
3：74.66g/L，NH
4Cl：187.48g/L；
Outlet waste liquid forms:
NaHCO
3：9.28g/L，NaCl：64.15g/L，Na
2SO
4：20.72g/L，
NH
4HCO
3：11.92g/L，NH
4Cl：184.38g/L；
Waste material liquid is delivered to interchanger through sewage and is warming up to desired temperature, to decomposite the C in 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 by feed pump, deliver to second stage polyphasic flow rotation foam separator stripping, 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 saline slot separately, then send alkaline workshop back to as raw material through brinepump, complete 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+sepiolites 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 pH value in 11 left and right simultaneously.Until free ammonia stripping to after below 800mg/L, through feed pump, 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 again, reach the following rear qualified discharge of re-set target 15mg/L.Sepiolite in adsorption tower can be through with regenerating after water purification back flushing, and wash-down water drains into sewage lagoon.
Embodiment 4
Jiangxi Ke Rong company high temperature, high humidity, high cloud of dust gas dust removal process project
Flue gas treatment capacity: 50000m
3/ h, design technology: two-tube+preposition cooling of secondary
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 to carry out stripping to flue gas.
1), through gas blower 8, the high-temperature flue gas from approximately 2000 ℃ of smelting kiln stove is imported to the wave duct 1 of polyphasic flow rotation foam separator, directly contact with the overflow liquid film of wave duct 1 temperature descending section, through thin film evaporation, absorb its sensible heat cooling;
2) desulfurization and denitrification reaction liquid is delivered to the circulation groove 3 of polyphasic flow rotation foam separator through liquid phase entrance 9, through recycle pump 7, absorption reaction liquid is delivered to again to the rotating fluid nozzle 2 of wave duct 1, with the direct counter current contact of flue gas after cooling, and control flow, make vapour-liquid ratio in 500～2000 scopes, gas-phase pressure drop is at 50～500mmH
2within the scope of O, 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 agents, and open liquid phase by product outlet 12, control liquidometer 16 liquid levels at 1/2nd to 2/3rds places.
4) processed flue gas completes double absorption through tail gas absorption tube 5, then after built-in mist eliminator foam removal, enters induced draft fan through chimney 17 discharges.
From the high-temperature flue gas of approximately 2000 ℃ of smelting the kiln of kiln, after the wave duct temperature descending section of first step polyphasic flow rotation foam separator is cooling again, contact with the foam layer of rotation standing wave, make dust content be down to 2500mg/m
3below, then through offgas duct final dusting, make dust content be down to 800mg/m
3below, then through induced draft fan, import again second stage polyphasic flow rotation foam separator, make dust content be down to 200mg/m
3below, complete 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 carbonated drink knockout tower is removed liquid phase mist, by induced draft fan, directly deliver to smoke stack emission.
Claims (3)
1. with polyphasic flow rotation foam separator, process the technique of waste water, described polyphasic flow rotation foam separator comprises circulation groove (3), wave duct (1) and tail gas absorption tube (5) are housed on circulation groove (3), the separated dividing plate (4) of gas-liquid-solid three-phase is housed in circulation groove (3), rotating fluid nozzle (2) is housed in wave duct (1), industrial filler or absorption agent (6) are housed in tail gas absorption tube (5); The airduct of gas blower (8) connects wave duct (1); On circulation groove (3), have liquid phase entrance (9), charging opening (10), wash water valve (13) and recycle valve (14), the water inlet pipe of recycle pump (7) connects recycle valve (14), and rising pipe connects rotating fluid nozzle (2); On recycle valve (14), be connected with liquid-phase outlet valve (15); On tail gas absorption tube (5), there are absorption agent charging opening (11) and liquid phase by product outlet (12), liquidometer (16) be housed on circulation groove (3), it is characterized in that:
1), first start gas blower (8) and air is sent into the wave duct (1) of polyphasic flow rotation foam separator, close the liquid-phase outlet valve (15) of circulation groove (3) simultaneously;
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 gas blower (8), and control flow, make vapour-liquid ratio in 100～500 scopes, gas-phase pressure drop, within the scope of 30～300mmH2O, makes 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 liquid phase by product outlet (12) of tail gas absorption tube (5), control the liquid level of liquidometer (16) at 2/3rds to 3/4ths places, sampling detects the ammonia nitrogen value of sewage in groove, if below standard, close liquid phase entrance (9), by the interior sewage of recycle pump (7) circular treatment circulation groove (3), until hit the target, then opening liquid-phase outlet valve (15) discharges, open liquid phase entrance (9) simultaneously, and make import and export maintain flow equilibrium.
2. with polyphasic flow rotation foam separator, process the technique of waste gas, described polyphasic flow rotation foam separator comprises circulation groove (3), wave duct (1) and tail gas absorption tube (5) are housed on circulation groove (3), the separated dividing plate (4) of gas-liquid-solid three-phase is housed in circulation groove (3), rotating fluid nozzle (2) is housed in wave duct (1), industrial filler or absorption agent (6) are housed in tail gas absorption tube (5); The airduct of gas blower (8) connects wave duct (1); On circulation groove (3), have liquid phase entrance (9), charging opening (10), wash water valve (13) and recycle valve (14), the water inlet pipe of recycle pump (7) connects recycle valve (14), and rising pipe connects rotating fluid nozzle (2); On recycle valve (14), be connected with liquid-phase outlet valve (15); On tail gas absorption tube (5), there is absorption agent charging opening (11) and liquid phase by product outlet (12), in the outlet of tail gas absorption tube (5), be connected to induced draft fan; Liquidometer (16) is housed on circulation groove (3), it is characterized in that:
1), through gas blower (8), high-temp waste gas is imported to the wave duct (1) of polyphasic flow rotation foam separator, directly contact with the overflow liquid film of wave duct (1) temperature descending section, through thin film evaporation, absorb its sensible heat cooling;
2) desulfurization and denitrification reaction liquid is delivered to the circulation groove (3) of polyphasic flow rotation foam separator through liquid phase entrance (9), through recycle pump (7), absorption reaction liquid is delivered to again to the rotating fluid nozzle (2) of wave duct (1), with the direct counter current contact of flue gas after cooling, and control flow, make vapour-liquid ratio in 500～2000 scopes, gas-phase pressure drop, within the scope of 50～500mmH2O, makes 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 liquid phase by product outlet (12), control liquidometer (16) liquid level at 1/2nd to 2/3rds places;
4) processed flue gas completes double absorption through tail gas absorption tube (5), then after tail gas absorption tube (5) foam removal, enters induced draft fan and send into chimney (17) discharge.
3. the technique of processing waste water or waste gas with polyphasic flow rotation foam separator according to claim 1 and 2, is characterized in that: the rotating fluid nozzle (2) in wave duct (1) arranges more than 2.
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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 |
| CN104229991B (en) * | 2014-08-26 | 2016-03-09 | 常州大学 | Surfactivity catalyst treatment wastewater from chemical industry middle and high concentration ammonia nitrogen device |
| CN105833567B (en) * | 2016-06-13 | 2018-04-10 | 江苏海事职业技术学院 | Marine intelligent oil water separator |
| CN107352701B (en) * | 2017-09-14 | 2020-10-27 | 周大军 | High ammonia nitrogen sewage treatment device with circulating tank and process |
| 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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