CN204848575U - System for saponification waste liquid preliminary treatment - light catalytic oxidation depths reason contains aldehyde waste water - Google Patents
System for saponification waste liquid preliminary treatment - light catalytic oxidation depths reason contains aldehyde waste water Download PDFInfo
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- CN204848575U CN204848575U CN201520480012.9U CN201520480012U CN204848575U CN 204848575 U CN204848575 U CN 204848575U CN 201520480012 U CN201520480012 U CN 201520480012U CN 204848575 U CN204848575 U CN 204848575U
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Abstract
The utility model discloses a (B, ) saponification waste liquid preliminary treatment (b) (b) (b) (b) light catalytic oxidation depths reason contains the system (b) of aldehyde waste water, including governing system, reaction system, photocatalysis system, sedimentation tank, each system connects gradually through process line, flange and elevator pump, and sets up ultrasonic wave scale control ware between each headtotail pipeline. Wherein, governing system can contain aldehyde waste water flow according to settlement temperature, pH value automatically regulated, then flows in the reaction system, the reaction system includes that the inner chamber wall is provided with the mixed reactor of U type, the formaldehyde detector of the mixed blade of water conservancy diversion, gets into the catalytic reaction system after the formaldehyde emergence condensation saccharification, quartzy pipeline and formaldehyde detector that the photocatalysis system established the catalyst in, by peripheral hardware ultraviolet ray generator constitute, make formaldehyde continue catalytic reaction for go out water formaldehyde and be less than and want evaluation 50mgL, and behind sedimentation treatment entering biochemical treatment system. The utility model has the characteristics of easy operation, the running cost is low, and social and economic benefits are high.
Description
Technical field
The utility model belongs to formaldehyde-containing wastewater processing technology field, particularly one
the system of saponification waste liquid pre-treatment-photochemical catalytic oxidation depths reason aldehyde-containing sewage.
Background technology
Formaldehyde (HCHO) is a kind of colourless but have the chemical substance of intense stimulus smell, soluble in water, alcohol and ether, it is a kind of important organic chemistry raw material, be mainly used in the industries such as organic synthesis, synthetic materials, coating, rubber and agricultural chemicals, its derived prods has paraformaldehyde, polyoxymethylene, resol, urea-formaldehyde resin etc., and formaldehyde also can be used as disinfection and sanitas simultaneously.Then, although formaldehyde is of many uses, cheap, it is defined as carcinogens and teratogen by the World Health Organization, and it has, and toxicity is high, biodegradable is poor, the shortcoming of difficult treatment, and health and the living environment thereof of human body and biology in serious harm.
As previously mentioned, in view of formaldehyde is as a kind of important basic chemical industry raw material, the industries such as pharmacy, process hides, plastics, weaving and coating are widely used in, and thereby produce a large amount of formaldehyde-containing wastewaters, wherein is no lack of the formaldehyde waste water of high density, it, once flow out, will cause huge destruction to the ecotope of tellurian.Therefore, the waste water effectively processing aldehyde-containing sewage particularly high density about how becomes the problem of world's joint research.
At present, the treatment process of PARA FORMALDEHYDE PRILLS(91,95) waste water is roughly divided into two kinds according to the existence with or without phenol in waste water, one is phenolic wastewater, main employing condensation method, oxidation style, the process such as Coagulation Method, it two is not containing the waste water of phenol, main employing Fenton process, Chlorine Dioxide Method, steam blow-off method, oxidation-adsorption method, electrochemical process, biochemical process, the high-level oxidation technology process such as photocatalytic oxidation and wet oxidation process, but the shortcomings such as these process all exist complicated operation or treatment effect is undesirable, disadvantage as aforementioned biochemical process is exactly that formaldehyde can make protein coagulating, it can with the protein in microbe, DNA etc. directly produce reaction, suppress life activity or cause microbial death, when the concentration of formaldehyde reaches 150mg/L, microorganism active is former activated half, when the concentration of formaldehyde is more than 200mg/L, microorganism active is almost suppressed completely.Therefore, require that pending concentration of formaldehyde must be very low, and the treatment time is very long, to field condition limit value to some extent, higher to the requirement of microorganism, expense is also higher simultaneously, therefore, how to realize the efficient of high-concentration formaldehyde wastewater and economy be treated as technological difficulties.
Based on previous reasons, carrying out the key of biochemical treatment and validity thereof to waste water is pre-treatment to formaldehyde in waste water, at present effective pretreated method mainly lime method is carried out to formaldehyde-containing wastewater, also known as Fenton process, its cardinal principle and treatment process are: pH value be greater than 9 and temperature higher than under the condition of 40 DEG C, by throwing in lime, oxymethylene polymerization is made to generate glucide, and temperature, pH value are higher, the time of then reacting is shorter, the removal effect of PARA FORMALDEHYDE PRILLS(91,95) is higher, when treatment temp be 90 DEG C, pH value be greater than 9 time treatment effect more excellent.The patent of invention being 200910182029.5 as application number provides a kind of method processing high-concentration formaldehyde wastewater, belong to formaldehyde waste water processing technology field, the utility model can process high-concentration formaldehyde wastewater treatment agent calcium hydroxide or calcium oxide, the mol ratio of calcium hydroxide or calcium oxide and formaldehyde is 20:1-1:20, temperature of reaction is 10-100 DEG C, reaction times non-0.1-36 hour, at continuation biochemical process or additive method process formaldehyde-containing wastewater after process, realize the requirement that formaldehyde waste water reaches discharge or reuse.
But lime method process formaldehyde requires that delivering medicament amount is comparatively large, and the Ca of high density
2+make useless water hardness higher, have inhibition to follow-up microorganism eubolism, and can fouling on aeration tube and equipment, effectively run to cause to process safety and have a strong impact on.Therefore, in current technology method, how to adopt the formaldehyde waste water of the spent caustic solution process high density produced in production process to be a kind of method of efficient and cost-effective.The patent of invention being CN101830606B as notification number provides a kind of method adopting salkali waste process high-concentration formaldehyde wastewater, this invention belongs to field of environmental technology, concrete steps are as follows: be that the formaldehyde waste water of 100-10000mg/L passes into equalizing tank by concentration, pump into polyreaction pond, formaldehyde in waste water is polymerized in polyreaction pond becomes polysaccharide material, salkali waste is stored in salkali waste storage tank, automatically salkali waste outlet motorized valve is controlled by the online pH meter be arranged in polyreaction pond, remain that polyreaction pond pH value is greater than 9, automatically vapour pipe outlet electric valve is controlled by the online thermometer be arranged in polyreaction pond, remain that in pond, wastewater temperature is higher than 40 DEG C, by the lift pump flow control polyreaction pond residence time, ensure that the residence time is 0.1-80 hour, guarantee that water outlet concentration of formaldehyde is lower than 100mg/L, water outlet is again through pH, temperature regulates, to ensure wastewater temperature, pH is suitable for the needs of subsequent biochemical reaction.
In sum, utilize produce in propylene oxide production process high calcium, high ph-values, high temperature saponification waste liquid to 1, the aldehyde-containing sewage produced in 4-butyleneglycol production process carries out aldehydes removal pre-treatment, it is the method that the high-valued comprehensive circulating energy-saving of a kind of refuse utilizes, also be a kind of very low cost, effectively and the method for energy-saving and emission-reduction, make significantly to lower the requirement in value to the virose formaldehyde of biological tool, then waste water meets emission standard or reaches biochemical treatment requirement again after the reason of depths.
Summary of the invention
Project investment is there is large for current aldehyde-containing sewage treatment process, high or the aldehydes removal poor effect of working cost, cause the reluctant problem of follow-up wastewater biochemical, the purpose of this utility model is to provide and a kind ofly utilizes saponification waste liquid pre-treatment and depths reason aldehyde-containing sewage more thereafter
the system of saponification waste liquid pre-treatment-photochemical catalytic oxidation depths reason aldehyde-containing sewageutilize produce in propylene oxide production process high calcium, high ph-values, high temperature saponification waste liquid to 1, the aldehyde-containing sewage produced in 4-butyleneglycol production process carries out aldehydes removal pre-treatment, it is the method that the high-valued comprehensive circulating energy-saving of a kind of refuse utilizes, also be a kind of very economical, effectively and the method for energy-saving and emission-reduction, make significantly to be reduced in required value the virose formaldehyde of biological tool, then waste water meets emission standard or reaches biochemical treatment requirement again after the reason of depths.
To achieve these goals, adopted one of the present utility model
the system of saponification waste liquid pre-treatment-photochemical catalytic oxidation depths reason aldehyde-containing sewage, comprise regulation system, reactive system, photocatalytic system and settling tank, after regulation system, ligation system, connects photocatalytic system after reactive system, connects settling tank after photocatalytic system, described regulation system comprises regulating tank, agitator, pH value detector, infrared temperature monitor and flow quantity control instrument, agitator, pH value detector, infrared temperature monitor and flow quantity control instrument are installed in regulating tank, aldehyde-containing sewage import is received in regulating tank through flow quantity control instrument, described infrared temperature monitor, pH value detector are connected with flow quantity control instrument respectively, and aldehyde-containing sewage enters through aldehyde-containing sewage import, after regulation system regulates, enter reactive system, described reactive system comprises U-tube road mixing reactor and first formaldehyde on-line detector, the internal chamber wall of the bottom tube of U-tube road mixing reactor arranges water conservancy diversion hybrid blade, high alkalinity catalyzer is had in described U-tube road mixing reactor, described water conservancy diversion hybrid blade is located at waste liquor stream upwards and form oblique angle with tube cavity wall, first formaldehyde on-line detector is used for the aldehyde contenting amount in detection reaction system, flows into photocatalytic system after there is condensation saccharification react under entering aldehyde-containing sewage in reactive system high alkalinity catalyst wherein, described photocatalytic system is by quartz pipe, ultraviolet light generator, load has the nickel screen of catalyzer and second formaldehyde on-line detector to form, in quartz pipe, there is load to have the nickel screen of catalyzer, ultraviolet light generator arranged in parallel or symmetric offset spread and around being fixed on the outside of quartz pipe, in reactive system, pretreated for saponification waste liquid aldehyde-containing sewage is entered in photocatalytic system and carry out light-catalyzed reaction and make removing residue formaldehyde in strong UV-light, polyreaction is carried out under catalyst action, settling tank is entered after light-catalyzed reaction, biochemical treatment system is entered after settling tank process.
Linked together by pipeline, flange and lift pump between described regulation system, reactive system, photocatalytic system and settling tank and biochemical treatment system, and outside the pipeline connected in each system, Supersonijc scale-proof device is set.
It is 30 ° ~ 120 ° at the angle of waste liquor stream water conservancy diversion hybrid blade upwards and tube cavity wall.
Described ultraviolet light generator is high voltage mercury lamp, and yield of radiation is 0.5 ~ 20mW/cm
2.
It is 60 ° at the angle of waste liquor stream water conservancy diversion hybrid blade upwards and tube cavity wall.
The distribution mode of water conservancy diversion hybrid blade on tube cavity wall helically formula distribution or a position is uniformly distributed.
Specifically, the utility model mainly utilize produce in propylene oxide production process high calcium, high ph-values, high temperature saponification waste liquid to 1, after the aldehyde-containing sewage produced in 4-butyleneglycol production process carries out aldehydes removal pre-treatment, again photochemical catalytic oxidation advanced treatment is carried out to aldehyde-containing sewage, its technical scheme is characterized as: comprise regulation system, reactive system, photocatalytic system, settling tank, each system is connected successively by process pipe, flange and lift pump, and arranges Supersonijc scale-proof device between each system connecting tube; Described regulation system comprises regulating tank, agitator, pH value detector, infrared temperature monitor and flow quantity control instrument, wherein infrared temperature monitor, pH value detector and flow quantity control instrument are interconnected to constitute pH value, automatic temperature control system, and aldehyde-containing sewage enters reactive system after regulating; Described reactive system comprises U-tube road mixing reactor, first formaldehyde on-line detector, at the bottom tube internal chamber wall of U-tube road mixing reactor, water conservancy diversion hybrid blade is set, described water conservancy diversion hybrid blade is at the angle angled with tube cavity wall on direction of waste liquor stream, aldehyde-containing sewage, at reactive system generation condensation saccharification react, then flows into photocatalytic system; Photocatalytic system has the nickel screen of catalyzer by quartz pipe, ultraviolet light generator, load, second formaldehyde on-line detector is formed, wherein ultraviolet light generator side by side or symmetric offset spread around being fixed on outside pipeline, there is light-catalyzed reaction through the pretreated aldehyde-containing sewage of saponification waste liquid further in photocatalytic system, then after settling tank process, enter biochemical treatment system.
The concrete operation step of the method for described a kind of saponification waste liquid pre-treatment-photochemical catalytic oxidation depths reason aldehyde-containing sewage is as follows:
First, regulate temperature and pH value: successively saponification waste liquid, aldehyde-containing sewage are delivered to regulating tank, start agitator, infrared temperature monitor detects the temperature of mixed solution, the pH value of pH value detector Real-Time Monitoring mixed solution, and signal value is passed to the flow quantity control instrument be arranged on aldehyde-containing sewage pipeline, flow quantity control instrument regulates aldehyde-containing sewage flow automatically, the pH value controlling mixed solution is not less than 10, and temperature range is 50 ~ 55 DEG C;
Secondly, base catalyzed reactions: mixed solution is delivered to reactive system, waste liquid carries out condensation saccharification react in U-shaped pipeline reactor, the flow velocity of waste liquid is reduced by water conservancy diversion hybrid blade, and produce little vortex, make reaction more complete, first formaldehyde on-line detector Real-Time Monitoring waste liquid concentration of formaldehyde.Wherein, the key realizing formose reaction selects suitable catalyzer, under basic catalyst effect, formaldehyde-containing wastewater is heated to certain temperature and can sends out Formose Reaction formaldehydogenic.At present, usually adopt calcium hydroxide as catalysts.
Again, light-catalyzed reaction: reacted waste liquor stream is to photocatalytic system, waste liquor stream is through quartz pipe, the catalyzer be simultaneously carried on nickel screen produces katalysis, under the effect of strong UV-light, removing residue formaldehyde is carried out polyreaction, second formaldehyde on-line detector Real-Time Monitoring waste liquid concentration of formaldehyde, guarantees that water outlet concentration of formaldehyde is far below required value 50mg/L;
Finally, precipitation process: the waste liquid after light-catalyzed reaction is delivered to settling tank and precipitation process is carried out to suspended substance and throw out, then enter biochemical treatment system by lift pump.
The catalyzer of load on described nickel screen is the composition of Mn oxide, nano titanium oxide, and described Mn oxide is one or both combinations of manganese oxide, Manganse Dioxide or manganic oxide.Wherein, titanium deoxide catalyst is that one is considered to extremely promising deep purifying pollutent green technology, has preferably photocatalytic activity; And manganese oxide PARA FORMALDEHYDE PRILLS(91,95) has preferably catalysed oxidn, be applicable to as the lower-cost formaldehyde remover of one for the treatment of high-concentration formaldehyde.
High alkalinity catalyzer in described reactive system, from the saponification waste liquid of the high calcium produced in propylene oxide production process, high ph-values, high temperature, is Ca (OH) according to the high alkalinity catalyzer of the described saponification waste liquid of the difference of saponification process
2or NaOH.The aldehydes chemical substance of described aldehyde-containing sewage is from the formaldehyde produced in BDO production process.
Be 30 ° ~ 120 ° at waste liquor stream to the angle of water conservancy diversion hybrid blade and tube cavity wall on direction, be preferably 60 °; The distribution mode of water conservancy diversion hybrid blade on tube cavity wall is for helically formula distribution or a position are uniformly distributed.
Described ultraviolet light generator is high voltage mercury lamp, and yield of radiation is 0.5 ~ 20mW/cm
2.
The beneficial effect that the utility model realizes: the high calcium produced in the utility model comprehensive utilization propylene oxide production process, high ph-values, the saponification waste liquid of high temperature is to 1, the aldehyde-containing sewage produced in 4-butyleneglycol production process carries out aldehydes removal pre-treatment, it is the method that the high-valued comprehensive circulating energy-saving of a kind of refuse utilizes, also be that one is very economical, effectively and the method for energy-saving and emission-reduction, make significantly to lower the requirement in value to the virose formaldehyde of biological tool, then waste water meets emission standard or reaches biochemical treatment requirement again after the reason of depths, the utility model is without the need to building aldehyde-containing sewage process special arrangement, project investment is little, do not produce working cost, with low cost, and obvious processing effect, the problem that thorough solution aldehyde-containing sewage is difficult and processing cost is high, there is huge economic benefit, social benefit and environmental benefit.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present utility model.
Fig. 2 is processing unit schematic diagram of the present utility model.
Fig. 3 be Fig. 2 water conservancy diversion hybrid blade between the equally distributed A-A diagrammatic cross-section in position.
Fig. 4 be Fig. 2 water conservancy diversion hybrid blade between the A-A diagrammatic cross-section of position Spiral distribution.
In figure, 10 is regulation systems, 11 is saponification waste liquid imports, 12 is aldehyde-containing sewage imports, 13 is flow quantity control instruments, 14 is agitators, 15 is pH value detectors, 16 is infrared temperature monitors, 17 is regulating tanks, 20 is reactive systems, 21 is Supersonijc scale-proof devices, 22 is water conservancy diversion hybrid blades, 23 is first formaldehyde on-line detectors, 24 is flanges, 25 is U-tube road mixing reactors, 30 is photocatalytic system, 31 is quartz pipes, 32 is ultraviolet light generators, 33 is second formaldehyde on-line detectors, 34 is Supersonijc scale-proof devices, 40 is settling tanks, 45 is lift pumps, 50 is biochemical treatment systems, 60 is horizontal floors.
Embodiment
For ease of understanding
,now the chemism of the saponification liquor pre-treatment aldehyde-containing sewage that the utility model relates to is briefly described.
Under high alkalinity catalytic condition, formaldehyde is assembled symphysis and is become hexose, and carbohydrate is to no toxic biological effect, and therefore, aldehyde-containing sewage can enter biochemical treatment after alkaline waste liquor pre-treatment or pre-treatment.As far back as 1861, A.Batlerow just began one's study and directly synthesizes carbohydrate by formaldehyde, and this equation is called that Formose reacts, and its reaction equation is as follows:
The primary product of formose reaction is simple glucose, and gas chromatographic detection product out reaches tens kinds, can mutually transform again between various reactant, very complicated, and main formose reaction is as follows:
。
As everyone knows, the saponification waste liquid of high calcium, high pH value, high temperature will be produced in propylene oxide production process, and 1, aldehyde-containing sewage will be produced in 4-butyleneglycol production process, the utility model utilizes saponification waste liquid to carry out aldehydes removal pre-treatment to aldehyde-containing sewage, the formaldehyde content of wherein 70%-94% can be removed, and then secondary waste water is managed through photochemical catalytic oxidation depths, make water outlet Formaldehyde In Wastewarter far below 50mg/L, while realizing aldehydes removal object, and toxicity formaldehyde is made to generate the organism with biochemistry nutrition composition.Wherein, propylene oxide, have another name called propylene oxide, methyl oxirane (English name is Propyleneoxide, is called for short PO), be very important organic compound raw material, its molecular formula is as follows:
BDO (English name is Isosorbide-5-Nitrae-butanediol, is called for short BDO) is also a kind of important organic chemical industry and fine chemical material, and its chemical formula is as follows:
Further understanding to do the utility model, now it is explained, but these describing just in order to further illustrate advantage of the present utility model and feature in conjunction with the embodiments, instead of the restriction to the utility model claim.
As shown in Figure 1, second letdown tank of BDO device receives equalizing tank, the saponification waste-water of PO device also enters equalizing tank through the waste water conveying of PO device, after equalizing tank regulates, enter U-shaped reactor carry out formose reaction, formose reaction laggard enter photochemical catalytic oxidation, enter settling tank after photochemical catalytic oxidation and carry out flocculation sediment process, after by lift pump, waste water is injected biochemical treatment system.
As shown in Figure 2, Figure 3 and Figure 4, described in the utility model
the system of saponification waste liquid pre-treatment-photochemical catalytic oxidation depths reason aldehyde-containing sewage,comprise regulation system 10, reactive system 20, photocatalytic system 30 and settling tank 40, in regulation system 10 ligation system 20 below, reactive system 20 connects photocatalytic system 30 below, and photocatalytic system 30 connects settling tank 40 below, described regulation system 10 comprises regulating tank 17, agitator 14, pH value detector 15, infrared temperature monitor 16 and flow quantity control instrument 13, in regulating tank 17, agitator 14 is installed, pH value detector 15, infrared temperature monitor 16 and flow quantity control instrument 13, aldehyde-containing sewage import 12 is received in regulating tank 17 through flow quantity control instrument 13, described infrared temperature monitor 16, pH value detector 15 is interconnected with flow quantity control instrument 13 respectively and forms pH value, aldehyde-containing sewage flow, automatic temperature control system, aldehyde-containing sewage enters through aldehyde-containing sewage import 12, reactive system 20 is entered after regulation system 10 regulates, described reactive system 20 comprises U-tube road mixing reactor 25 and first formaldehyde on-line detector 23, the internal chamber wall of the bottom tube of U-tube road mixing reactor 25 arranges water conservancy diversion hybrid blade 22, high alkalinity catalyzer is had in described U-tube road mixing reactor 25, described water conservancy diversion hybrid blade 22 is located at waste liquor stream upwards and form oblique angle with tube cavity wall, first formaldehyde on-line detector 23 is for the aldehyde contenting amount in detection reaction system 20, photocatalytic system 30 is flowed into after the aldehyde-containing sewage entered in reactive system 20 condensation saccharification react occurs under high alkalinity catalyst in reactive system 20, described photocatalytic system 30 is by quartz pipe 31, ultraviolet light generator 32, load has the nickel screen of catalyzer and second formaldehyde on-line detector 33 to form, in quartz pipe 31, there is load to have the nickel screen of catalyzer, ultraviolet light generator 32 arranged in parallel or symmetric offset spread and around being fixed on the outside of quartz pipe 31, in reactive system 20, pretreated for saponification waste liquid aldehyde-containing sewage is entered in photocatalytic system 30 and carry out light-catalyzed reaction and make removing residue formaldehyde in strong UV-light, polyreaction is carried out under catalyst action, settling tank 40 is entered after light-catalyzed reaction, described settling tank is the technology that those skilled in the art can realize, natural sedimentation method or flocculent precipitation can be adopted, coagulant aids can select common anionic, cationic or non-ionic type gathers the one of propionic acid amide, biochemical treatment system 50 is entered after settling tank 40 processes, described biochemical treatment system is the technology that those skilled in the art can realize, the microorganism active treatment technology of prior art can be adopted.
Infrared temperature monitor 16 of the present utility model, pH value detector 15 and flow quantity control instrument 13 regulate temperature in regulating tank 17 and pH value: the temperature of infrared temperature monitor 16 Real-Time Monitoring mixed solution, the pH value of pH value detector 15 Real-Time Monitoring mixed solution, and by the temperature of mixed solution and pH value signal transmission to the flow quantity control instrument 13 be arranged on aldehyde-containing sewage pipeline, described flow quantity control instrument 13 is prior art products, MCU in described flow quantity control instrument 13 or central processing unit can regulate aldehyde-containing sewage flow automatically by the prior art computer program in this area arranged, with the pH value controlling mixed solution be not less than 10 and the temperature range of mixed solution be 50 ~ 55 DEG C.
Link together preferably by pipeline, flange 24 and lift pump between regulation system 10, reactive system 20, photocatalytic system 30 and settling tank 40 that the utility model is above-mentioned and biochemical treatment system 50, and outside the pipeline connected in each system, Supersonijc scale-proof device is set.
The catalyzer of load on nickel screen described in the utility model is the composition of Mn oxide, nano titanium oxide, and preferred proportion is 1:1 in mass ratio; High alkalinity catalyzer in described reactive system 20 adopts NaOH or Ca (OH)
2deng.
The utility model is 30 ° ~ 120 ° at the upwards set water conservancy diversion hybrid blade 22 of waste liquor stream with the angle of tube cavity wall, is preferably 60 °.
Ultraviolet light generator 31 described in the utility model is high voltage mercury lamp, and yield of radiation is 0.5 ~ 20mW/cm
2.
Above-mentioned Mn oxide is one or both combinations of manganese oxide, Manganse Dioxide or manganic oxide.
The distribution mode of the utility model water conservancy diversion hybrid blade 22 on tube cavity wall be shown in the spiral distribution shown in Fig. 3 or Fig. 4 between position be uniformly distributed.
Embodiment 1
The process system number of assembling steps of a kind of saponification waste liquid pre-treatment described in the utility model-photochemical catalytic oxidation depths reason aldehyde-containing sewage is as follows:
1) in regulating tank 17, agitator 14, pH value detector 15, infrared temperature monitor 16 and flow quantity control instrument 13 are installed, wherein infrared temperature monitor 16, pH value detector 15 are interconnected with flow quantity control instrument 13, pH value, the temperature of waste liquid in automatic control and adjustment pond, form regulation system 10.
2) by flange, U-shaped ducted each segment pipe is interconnected, be provided with at waste liquor stream angle water conservancy diversion hybrid blade 22 angled with tube cavity wall on direction at the bottom tube internal chamber wall of U-tube road mixing reactor 25, the distribution mode of water conservancy diversion hybrid blade 22 on tube cavity wall can select spiral distribution or a position to be uniformly distributed; Supersonijc scale-proof device 21 is set at the outer side of U-tube road mixing reactor 25 simultaneously, and first formaldehyde on-line detector 23 is set at U-tube road mixing reactor 25 back segment, form described reactive system 20.
3) nickel screen of catalyzer load is had to be placed in quartz pipe 31, after adopting flange to be connected with U-shaped ducted each segment pipe by quartz pipe 31, at the outer side of quartz pipe 31, ultraviolet light generator 32 is set, set gradually second formaldehyde on-line detector 33, Supersonijc scale-proof device 34 at the pipeline be connected with quartz pipe 31 water side simultaneously, form photocatalytic system 30.
4) by process pipe, flange 24 and lift pump, each system is connected successively, by through base catalysis pre-treatment, photochemical catalytic oxidation depths reason after containing formaldehyde lower than 50mg/L waste water inject settling tank 40 carry out flocculation sediment process, after by lift pump, waste water is injected biochemical treatment system.
Embodiment 2
After embodiment 1 packaging technology system, carry out aldehyde-containing sewage aldehydes removal process in the steps below:
1) produce in collecting ring Ethylene Oxide (PO) production process high calcium hydroxide saponification waste liquid make lime milk solution;
2) collect the aldehyde-containing sewage that each operation of BDO project produces, comprising: BYD synthesizer surface water, butanols tower waste water, vacuum system phlegma (the second letdown tank), the first letdown tank waste liquid, formaldehyde plant waste water;
3) by saponification waste liquid by Cemented filling to regulating tank 17, the temperature 65 ~ 70 DEG C of saponification waste liquid, pH value are about 12;
4) agitator 14 is started, aldehyde-containing sewage is delivered to regulating tank 17, infrared temperature monitor 16 detects the temperature of mixed solution, the pH value of pH value detector 15 Real-Time Monitoring mixed solution, and signal value is passed to the sensing flow meter 13 be arranged on aldehyde-containing sewage pipeline, sensing flow meter regulates aldehyde-containing sewage flow automatically, and the pH value controlling mixed solution is not less than 10, and temperature range is 50 ~ 55 DEG C;
5) after completing steps four, mixed solution is delivered in the U-shaped pipeline reactor 25 of reactive system 20, water conservancy diversion hybrid blade 22 reduces the flow velocity of waste liquid, and produce little vortex, formaldehyde carries out condensation saccharification react under alkaline catalysts effect, first formaldehyde on-line detector 23 Real-Time Monitoring waste liquid concentration of formaldehyde;
6) after step 5 completes, waste water is delivered to photocatalytic system 30, wastewater streams is through quartz pipe, under strong UV-light, catalyst action, removing residue formaldehyde is carried out polyreaction, second formaldehyde on-line detector 33 Real-Time Monitoring waste liquid concentration of formaldehyde, guarantees that water outlet concentration of formaldehyde is far below required value 50mg/L;
7) after step 6 completes, waste liquid is delivered to settling tank 40 pairs of suspended substances and throw out carries out precipitation process, then enter biochemical treatment system 50 by lift pump 45, make to generate the organism with activated sludge biochemical nutritive ingredient by there is the prefabricated formaldehyde of toxicity to active sludge.
Embodiment 3
Carry out aldehydes removal process according to the operation steps of embodiment 2 to waste water, wherein, the temperature 65 ~ 70 DEG C of saponification waste liquid, pH value are about 12, and aldehyde-containing sewage water inlet concentration of formaldehyde is 7500-8500mg/L, and the aldehydes removal effect of the utility model processing unit is as shown in the table:
Although the utility model describes concrete case study on implementation; but; scope of the present utility model is not limited to above-mentioned specific embodiment, when not departing from the utility model essence, all falls into protection domain of the present utility model to various modification of the present utility model, change and replacement.
Claims (6)
1. one kind
the system of saponification waste liquid pre-treatment-photochemical catalytic oxidation depths reason aldehyde-containing sewagecomprise regulation system (10), reactive system (20), photocatalytic system (30) and settling tank (40), in regulation system (10) ligation system (20) below, reactive system (20) connects photocatalytic system (30) below, and photocatalytic system (30) connects settling tank (40) below, described regulation system (10) comprises regulating tank (17), agitator (14), pH value detector (15), infrared temperature monitor and flow quantity control instrument (13), in regulating tank (17), agitator (14) is installed, pH value detector (15), infrared temperature monitor and flow quantity control instrument (13), aldehyde-containing sewage import (12) is received in regulating tank (17) through flow quantity control instrument (13), described infrared temperature monitor (16), pH value detector (15) is connected with flow quantity control instrument (13) respectively, aldehyde-containing sewage enters through aldehyde-containing sewage import (12), reactive system (20) is entered after regulation system (10) regulates, described reactive system (20) comprises U-tube road mixing reactor (25) and first formaldehyde on-line detector (23), the internal chamber wall of the bottom tube of U-tube road mixing reactor arranges water conservancy diversion hybrid blade (22), high alkalinity catalyzer is had in described U-tube road mixing reactor (25), described water conservancy diversion hybrid blade (22) is located at waste liquor stream upwards and form oblique angle with tube cavity wall, first formaldehyde on-line detector (23) is for the aldehyde contenting amount in detection reaction system (20), photocatalytic system (30) is flowed into after there is condensation saccharification react under entering aldehyde-containing sewage in reactive system (20) high alkalinity catalyst wherein, described photocatalytic system is by quartz pipe (31), ultraviolet light generator (32), load has the nickel screen of catalyzer and second formaldehyde on-line detector (33) to form, in quartz pipe (31), there is load to have the nickel screen of catalyzer, ultraviolet light generator (32) arranged in parallel or symmetric offset spread and around being fixed on the outside of quartz pipe (31), in reactive system (20), pretreated for saponification waste liquid aldehyde-containing sewage is entered in photocatalytic system (30) and carry out light-catalyzed reaction and make removing residue formaldehyde in strong UV-light, polyreaction is carried out under catalyst action, settling tank (40) is entered after light-catalyzed reaction, biochemical treatment system (50) is entered after settling tank (40) process.
2. according to claim 1
the system of saponification waste liquid pre-treatment-photochemical catalytic oxidation depths reason aldehyde-containing sewageit is characterized in that: linked together by pipeline, flange (24) and lift pump between described regulation system (10), reactive system (20), photocatalytic system (30) and settling tank (40) and biochemical treatment system (50), and outside the pipeline connected in each system, Supersonijc scale-proof device is set.
3. according to claim 1 and 2
the system of saponification waste liquid pre-treatment-photochemical catalytic oxidation depths reason aldehyde-containing sewage, it is characterized in that: be 30 ° ~ 120 ° at waste liquor stream water conservancy diversion hybrid blade (22) upwards and the angle of tube cavity wall.
4. according to claim 1 and 2
the system of saponification waste liquid pre-treatment-photochemical catalytic oxidation depths reason aldehyde-containing sewage, it is characterized in that: described ultraviolet light generator (31) is high voltage mercury lamp, yield of radiation is 0.5 ~ 20mW/cm
2.
5. according to claim 3
the system of saponification waste liquid pre-treatment-photochemical catalytic oxidation depths reason aldehyde-containing sewage, it is characterized in that: be 60 ° at waste liquor stream water conservancy diversion hybrid blade (22) upwards and the angle of tube cavity wall.
6. according to claim 5
the system of saponification waste liquid pre-treatment-photochemical catalytic oxidation depths reason aldehyde-containing sewage, it is characterized in that: the distribution mode of water conservancy diversion hybrid blade (22) on tube cavity wall helically formula distribution or a position is uniformly distributed.
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| CN201520480012.9U CN204848575U (en) | 2015-07-07 | 2015-07-07 | System for saponification waste liquid preliminary treatment - light catalytic oxidation depths reason contains aldehyde waste water |
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| CN109650623A (en) * | 2018-09-30 | 2019-04-19 | 佛山市顺德区名环保设备有限公司 | A kind of duct type sewage disposal system |
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| CN109650623A (en) * | 2018-09-30 | 2019-04-19 | 佛山市顺德区名环保设备有限公司 | A kind of duct type sewage disposal system |
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