CN103361165B - Regenerative equipment and method for waste emulsion produced in steel rolling process - Google Patents
Regenerative equipment and method for waste emulsion produced in steel rolling process Download PDFInfo
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- CN103361165B CN103361165B CN201310211366.9A CN201310211366A CN103361165B CN 103361165 B CN103361165 B CN 103361165B CN 201310211366 A CN201310211366 A CN 201310211366A CN 103361165 B CN103361165 B CN 103361165B
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Abstract
The invention provides regenerative equipment and method for a waste emulsion produced in a steel rolling process. The equipment comprises a feeding unit, a heating unit, a filtering and impurity removing unit, a thermal-chemical treatment unit and a product refining unit, wherein the filtering and impurity removing unit comprises a primary filter, a secondary filter and a magnetic filter which are connected with one another sequentially; the thermal-chemical treatment unit is used for performing thermal-chemical treatment on the heated and filtered waste emulsion, and comprises a first mixer, a first thermal precipitation tank, a second mixer and a second thermal precipitation tank; the first mixer is connected to the filtering and impurity removing unit, a demulsifier supply device and the first thermal precipitation tank; the second mixer is connected to a flocculant supply device, a first thermal precipitation tank and the second precipitation tank. By virtue of the equipment and the method, the waste emulsion produced in the steel rolling process can be processed and treated efficiently in accordance with the requirement on environment protection, so that regenerative fuel oil with stable quality can be obtained with a high recycling rate, and the difficulty of sewage treatment can be remarkably reduced.
Description
Technical field
The present invention relates generally to the processing of emulsion, specifically, relates to reclaim equiment and the method for the waste emulsified mixture producing in rolling process.
Background technology
Rolling is to utilize roll metal stock to be rolled into the pressure processing craft of all size sheet material.In System on Rolling Steel, conventionally with emulsion, carry out cooling, lubricated rolled piece.Rolling emulsion requires to have good cooling and lubricating performance, chemical stability and rustless property, it is take mineral oil as basis and add various additives, formation contains rust-preventive agent, emulsifying agent, defoamer, antioxidant etc., has the mineral oil-water mixed liquid of stable chemical property.Rolling emulsion in use can be subject to high temperature and oxygenizement, and metal-powder and the moisture of invading can make oil product aged deterioration gradually, so must change after using certain hour.Waste emulsified mixture complex chemical composition, water and foreign matter content are high, and emulsification degree is serious, and stable chemical nature brings very large difficulty to subsequent disposal and recycling.
Specifically, the waste emulsified mixture that rolling process produces (or being called useless cold-rolled lubricating oil) has following characteristics:
(1) water content is high: the water content of this waste emulsified mixture is 20%～70%, and other kind waste lubricating oil is moisture, is no more than 5%.
(2) emulsifier content is high: because cold-rolled lubricating oil must have suitable emulsifying stability, so emulsifier content is wherein 10%～15%.To waste liquid, dehydration brings very big difficulty to high emulsifier content.
(3) greasy filth and gum level are high: because the applying working condition of cold-rolled lubricating oil is harsh, oil product, by heating and cooling repeatedly, makes oil product be easy to oxidation.The further accelerating oxidation of high-moisture of emulsion simultaneously, also easily receives the infringement of microorganism, so the products of metamorphism in waste emulsified mixture is many especially.
For the feature of above-mentioned waste emulsified mixture, in industry, adopted at present processing and processing mode as described below.
The people such as Liu Jiafa (refer to < < Shanghai chemical industry > > (2006; 31(3): 1-3); " Baosteel 2030 cold rolling waste emulsified mixture reclaiming process researchs ") for Baosteel 2030 cold rolling waste emulsified mixtures (moisture 20～80%; w/o type milk sap) adopt high pressure static electricity method breakdown of emulsion and chemical refining combination process to this waste oil regeneration, after regeneration, oil product is used as oil fuel.
The people such as Sun Xiaofeng (refer to < < bao steel technology > >, 2005, (3): 35-40, " research of Regeneration Process of Mixed Waste Oil with Medium-High Viscosity and application ") reclaiming process that adopted flocculation-sedimentation and three-stage filtration to combine with vacuum hydro-extraction for the waste and old oil of Baosteel medium-high viscosity (moisture 20～80%, w/o type milk sap).
The people such as Tang Jianwei (< < membrane science and technology > >, 2010,30(1): 103-107, " progress of membrane separation technique in waste oil regeneration ") for waste internal-combustion engine oil, adopt the ceramic membrane of 0.2 μ m to carry out regeneration tests.Research shows that Ceramic Membranes Separating Technique can effectively remove metal ion, mechanical impurity and the moisture etc. in waste oil.But waste lubricating oil viscosity is large, oil product foreign matter content is high, has the problems such as Membrane Filtration Flux is lower, film is seriously polluted, has seriously limited the application of membrane separation technique in waste oil regeneration.
Domestic certain factory's waste emulsified mixture reclaiming process adopts following flow process:
Refine → bleaching earth adsorption → filtration → lubricating base oils of precipitation → centrifugation → cohesion.
Precipitation: object is to remove most of moisture and the impurity in waste emulsified mixture.Waste emulsified mixture is heated to 60-80 ℃ in the homemade setting tank of heating, precipitation 1-2 days, and moisture impurity clearance can reach 90%.
Centrifugation: waste emulsified mixture is after precipitation, then with the further separating oil of settling centrifuge, water, slag, centrifuge speed is 1500-2000r/min, and the centrifugation time is 15-20min.
Cohesion is refining: object is to make that the insolubless such as colloid, bituminous matter and hydrocarbon oxide condense, throwing out, thereby precipitating is separated.Cohesion process for refining parameter is as follows: temperature is 60-70 ℃; Stirring velocity is 90-120r/min; The flocculation reaction time is 8-10min; The size of flocculant addition, depends on insolubles amount and the oil viscosities such as colloid contained in waste emulsified mixture, pitch.
Bleaching earth adsorption: process and further remove the impurity such as medium pitch, colloid that deoil by bleaching earth adsorption, and play dehydration, decolorization.Its processing parameter is as follows: temperature is controlled at 120 ℃ and is advisable; Stirring velocity is 90-120r/min; Carclazyte is with measuring the 5-10% that oil is heavy; Reaction times is generally 30～60min.
Filter: this is the finishing operation of waste emulsified mixture regeneration, is also the key link of removing carclazyte, colloid and various impurity.This process using plate-and-frame filter press, does medium with filter cloth, by press filtration, makes oil purification.For preventing that oil viscosity from increasing, block filter cloth, oil temperature is controlled at 100～140 ℃, and filter pressure is got 0.2～0.4MPa.
The oil reclaiming by above-mentioned technique can be used as lubricating base oils.
In addition, in this area, the most generally adopt the mode that adds sulfuric acid or phosphoric acid to process waste emulsified mixture at present, do like this and can in the waste water after processing, comprise the disadvantageous acid of environment, and it is not high to reclaim the oily quality and the rate of recovery that obtain yet.
To sum up, at present domestic machinery, steel rolling industry, also do not find a kind of efficiently, conform with the waste emulsified mixture that the equipment of environmental requirement and method produce in to rolling process and process and process.
Summary of the invention
For the problems referred to above, the object of the invention is to the equipment and the method that provide a kind of waste emulsified mixture to producing in rolling process efficient, that conform with environmental requirement to process and process.
For achieving the above object, the invention provides a kind of reclaim equiment of the waste emulsified mixture producing for rolling process, comprising:
Dosage unit, the dosage unit various raw materials of annotating, dosage unit comprises waste emulsified mixture head tank, emulsion splitter feedway and flocculation agent feedway;
Heating unit, heating unit is connected to dosage unit, and heating unit receives the raw material from dosage unit, and raw material is heated;
Filtering and impurity removing unit, filtering and impurity removing unit is connected to heating unit, filtering and impurity removing unit receives from the waste emulsified mixture after the heating of heating unit, solid impurity in filtering waste emulsified mixture, and send the waste emulsified mixture after filtration, filtering and impurity removing unit comprises grade one filter, secondary filter and the magnetic filter connecting successively;
Heat-chemistry processing unit, heat-chemistry processing unit is connected to dosage unit and filtering and impurity removing unit, to carrying out heat-chemistry processing after heating and through the waste emulsified mixture filtering, heat-chemistry processing unit comprises the first mixing tank, the first hot slurry tank, the second mixing tank and the second hot slurry tank, the first mixing tank is connected to filtering and impurity removing unit, emulsion splitter feedway and the first hot slurry tank, and the second mixing tank is connected to flocculation agent feedway, the first hot slurry tank and the second slurry tank; And
Product purification unit, product purification unit is connected to heat-chemistry processing unit, and product purification unit receives the emulsion after heat-chemistry is processed, and it is carried out to further refinement treatment.
Preferably, also comprise: be connected to the finished product receiving element of product purification unit, finished product receiving element receives the proper fuel oil making.
Preferably, emulsion splitter feedway comprises emulsion splitter tank and emulsion splitter injection device, and flocculation agent feedway comprises flocculation agent tank and flocculation agent injection device.
Preferably, filtering and impurity removing unit is connected to heating unit by under meter.
Preferably, product purification unit comprises intermediates tank and oil filter.
The present invention also provides a kind of renovation process of the waste emulsified mixture producing for rolling process, comprises the steps:
A) waste emulsified mixture is sent to heating unit from dosage unit;
B) in heating unit, waste emulsified mixture is heated to 60～95 ℃;
C) waste emulsified mixture heating is sent to filtering and impurity removing unit from heating unit, makes it to pass through successively grade one filter, secondary filter and magnetic filter, to remove solid impurity;
D) waste emulsified mixture of filtration was entered into the first mixing tank, mix statically with the emulsion splitter from emulsion splitter feedway there, make mixed solution enter the first hot slurry tank, sedimentation at the temperature of 60～95 ℃, waste emulsified mixture layering in hot slurry tank, the oil on upper strata is sent to intermediates tank, the water of lower floor is mixed and is sent to sewage disposal device, and the second mixing tank is sent to in the middle layer of emulsification;
E) middle layer of emulsification is mixed in the second mixing tank with the flocculation agent from flocculation agent feedway, make again mixed solution enter the further thermal subsidence dehydration of the second hot slurry tank, sedimentation at the temperature of 60～95 ℃, the oil on generated upper strata is sent to intermediates tank, by the assorted sewage disposal device that is sent to of the water of lower floor; And
F) oil in middle products pot is carried out to refinement treatment.
Preferably, also comprise: after step f), the oil after refinement treatment is sent to finished product receiving element.
Preferably, the hot settling temperature in the first hot slurry tank and the second hot slurry tank is 80～85 ℃.
Preferably, emulsion splitter is by anion surfactant with nonionogenic tenside is composite forms.
Preferably, emulsion splitter is by the sodium lauryl sulphate as anion surfactant with as composite the forming of alkylphenol polyoxyethylene of nonionic demulsifier.
Preferably, the mass ratio of sodium lauryl sulphate and alkylphenol polyoxyethylene is 200:1, and add-on is 6-10g/L milk sap.
Preferably, flocculation agent is by organic floculant with organic silicon surfactant is composite forms.
Preferably, flocculation agent is by the poly-methyl-prop diluted acid of the positively charged ion as organic floculant with as composite the forming of polysiloxane polyether copolymer of organic silicon surfactant.
Preferably, the mass ratio of the poly-methyl-prop diluted acid of positively charged ion and polysiloxane polyether copolymer is 20:1, and add-on is 200-300mg/L milk sap.
By equipment of the present invention and method, can be to the waste emulsified mixture producing in rolling process being carried out to efficiently, conforms with processing and the processing of environmental requirement, thereby can obtain stay-in-grade regenerated fuel oil with high-recovery, and significantly reduce the intractability of sewage.
Accompanying drawing explanation
Fig. 1 is waste emulsified mixture (useless cold-rolled lubricating oil) reclaim equiment of the preferred embodiment according to the present invention and the schematic flow sheet of technique.
Embodiment
Fig. 1 shows reclaim equiment according to the present invention preferred embodiment, that be applied to especially the waste emulsified mixture (useless cold-rolled lubricating oil) that produces in rolling process, and it mainly comprises: dosage unit, heating unit, filtering and impurity removing unit, heat-chemistry processing unit, product purification unit and finished product receiving element.
As shown in Figure 1, the dosage unit various raw materials that are used for annotating.Described dosage unit for example comprises head tank 1, emulsion splitter feedway (for example comprising emulsion splitter tank 6 and emulsion splitter injection device 7), flocculation agent feedway (for example comprising flocculation agent tank 11 and flocculation agent injection device 12), and raw material (waste emulsified mixture), emulsion splitter and flocculation agent are used for respectively annotating.
Heating unit is connected to dosage unit, for receiving raw material from the dosage unit waste emulsified mixture of head tank 1 (especially from), and raw material is heated.Described heating unit for example comprises heating tank 2.
Filtering and impurity removing unit is preferably connected to heating unit by under meter 3, for receiving from the waste emulsified mixture after the heating of heating unit, and the solid impurity in filtering waste emulsified mixture, and the waste emulsified mixture after filtering is sent to heat-chemistry processing unit.Described filtering and impurity removing unit for example comprises filtration unit 4, more specifically comprises the grade one filter 41, secondary filter 42 and the magnetic filter 43 that connect successively.Wherein, connect successively and the grade one filter 41, secondary filter 42 and the magnetic filter 43 that form classified filtering is the distinctive configurations of the present invention.In the prior art, adopt conventional filter type to carry out the solid impurity in filtering waste emulsified mixture more, exist filtration pressure drop large, the shortcoming that filtration velocity is slow.The present invention be filtering and impurity removing unit is arranged on to heat-chemistry processing unit described later before, rather than be arranged on chemical treatment as some prior art after.Applicant finds can significantly improve like this effectiveness of chemical agent.In addition, adopt the configuration of classified filtering of the present invention, can significantly improve filtration efficiency.Especially, the present invention is provided with magnetic filter 43 after grade one filter 41 and secondary filter 42, before this magnetic filter, just in foodstuffs industry, be used widely, be used for removing metallic impurity, in other chemical process process field, generally believe that its filtration efficiency is low, nobody is applied.Yet the application's applicant finds, adds the step that magnetic filters after the single filter suitably configuring and cascade filtration, can significantly improve filtration efficiency and effect.
Heat-chemistry processing unit is connected to dosage unit and filtering and impurity removing unit, for carrying out heat-chemistry processing to heating waste emulsified mixture rear and that process is filtered.Heat-chemistry processing unit for example comprises the hot slurry tank 8 of the first mixing tank 5, first, the second mixing tank 9 and the second hot slurry tank 10.The first mixing tank 5 is connected to filtering and impurity removing unit, emulsion splitter feedway and the first hot slurry tank 8, from the waste emulsified mixture of filtering and impurity removing unit with from the emulsion splitter of emulsion splitter feedway, in the first mixing tank 5, mix statically, be then sent to the first hot slurry tank 8.The second mixing tank 9 is connected to flocculation agent feedway, the first hot slurry tank 8 and the second slurry tank 10, from the emulsion of the first hot slurry tank 8 with from the flocculation agent of flocculation agent feedway, in the second mixing tank 9, mix statically, be then sent to the second hot slurry tank 10.For a change, in the present invention, adopt the step-by-step processing method of emulsion splitter and flocculation agent to carry out heat-chemistry processing to emulsion.This step-by-step processing, in conjunction with adopted special emulsion splitter and flocculation agent, has significantly improved efficiency and the effect processed.This is by hereinafter to being described in further detail in the elaboration of method.
Product purification unit is connected to heat-chemistry processing unit, for receiving the emulsion after heat-chemistry is processed, and it is carried out to further refinement treatment.Described product purification unit for example comprises intermediates tank 13 and oil filter 14.14 pairs of oil products from intermediates tank of oil filter carry out vacuum hydro-extraction further, thereby obtain proper fuel oil.
Finished product receiving element is connected to product purification unit, for receiving the proper fuel oil making.Described finished product receiving element for example comprises products pot 15.
By specifically describing, how to utilize equipment of the present invention to carry out the method for processing treatment waste emulsified mixture below.
The present invention adopts the method that physical sepn-chemical refining combines to carry out processing treatment waste emulsified mixture, and its technical process is roughly as follows:
Stock oil → heating unit → filtering and impurity removing unit → heat-chemistry processing unit → product purification unit → finished product receiving element
First, waste emulsified mixture is pumped into heating tank 2 from head tank 1, at heating tank, is heated to 60～95 ℃ (preferably 80～85 ℃).
Then, then through under meter 3 meterings, through filtering and impurity removing unit, make it successively by grade one filter 41 waste emulsified mixture pumping, secondary filter 42 and magnetic filter 43, remove solid impurity.In the present invention, be to carry out the filtration of solid impurity before heat-chemistry is processed, test shows to have significantly improved like this effect of chemical demulsification, according to one's analysis, this may be owing to having reduced solid particulate, the impact of waste emulsified mixture breaking emulsion and dewatering to be realized.Therefore specifically, may be that the positive charge that solid impurity particle surface carries can consume part emulsion splitter and/or flocculation agent, thereby affect the effect of heat-chemistry breakdown of emulsion, filtering solid particulate can significantly improve the effect of heat-chemistry breakdown of emulsion in advance.In addition, the present invention adopts classified filtering, in the present embodiment, first uses grade one filter 41 filtering macrobead solid impurities (60 order), use again secondary filter 42 filtering solid small particles impurity (150 order), finally use the more tiny solid impurity of magnetic filter 43 filterings.This configuration is the discovery as described below based on applicant, that is, the main component of the solid impurity that granularity is less is iron, adopts this area to carry out last step filtration from original magnetic filter and can greatly improve filtration efficiency.And, via the filtration treatment of this magnetic filter, even if there is remaining solid impurity, also can avoids owing to being magnetized adsorbed oil molecule, thereby significantly strengthen demulsification.
Follow again, make the waste emulsified mixture after the removal of impurity after filtration enter the first mixing tank 5, mix statically with the emulsion splitter from emulsion splitter feedway there.Make mixed solution enter the first hot slurry tank 8, in 60～95 ℃ of (preferably 80～85 ℃) sedimentations 12～36 hours (preferably 24 hours).Waste emulsified mixture layering in hot slurry tank, forms upper strata, middle layer and lower floor.Wherein, upper strata is the moisture oil that is less than 5%, by slurry tank top discharge nozzle, sends into intermediates tank 13.Lower floor is mainly moisture impurity (being called for short water assorted), and pH value is 6～8, and light yellow transparent, oleaginousness is less than 300mg/L, can directly enter sewage disposal device.In the middle of oil reservoir and water layer, have one deck Middle emulsion layer, it is black, water content at 20%～50%(generally 30～40%).Specifically, while being chocolate as wastewater disposition, show that sewage discharge is complete, be now Middle emulsion layer.Middle emulsion layer is mixed in the second mixing tank 9 statically with the flocculation agent from flocculation agent feedway.Make again subsequently mixed solution enter the further thermal subsidence dehydration of the second hot slurry tank 10, in 60～95 ℃ of temperature (preferably 80～85 ℃) sedimentation 12～36 hours (preferably 24 hours), the moisture oil that is less than 5% in top generating, by slurry tank top discharge nozzle, send into intermediates tank, and bottom discharge water is chocolate, need to discharge and enter sewage apparatus again after further flocculation treatment.
Finally, with oil filter, the oil product in middle products pot 15 is carried out to further vacuum hydro-extraction processing, thereby filter, obtain proper fuel oil.
In the manipulation of regeneration equipment and process (method) of waste emulsified mixture of the present invention, except filtering and impurity removing in the past of aforesaid difference and adopt the step-by-step processing of emulsion splitter and flocculation agent, heat sink chemical demulsifier and the flocculation agent of falling of also having selected especially the useless cold-rolled lubricating oil that is specially adapted to rolling process obtaining after applicant studies for a long period of time, this is also a very important aspect of the present invention.
Emulsion splitter according to the present invention is for example, by anion surfactant (sodium lauryl sulphate (K-12), sodium branched alkyl benzene sulfonate, linear alkylbenzene sulphonic acid, sulfonated α-olefin etc.), composite the forming of nonionogenic tenside (for example alkylphenol polyoxyethylene (TX-10)).In a preferred embodiment, select sodium lauryl sulphate (K-12) as anion surfactant and as the composite formation emulsion splitter of alkylphenol polyoxyethylene (TX-10) of nonionic demulsifier, both mass ratioes are 200:1, and add-on is 6-10g/L milk sap.In emulsion splitter of the present invention, the mass ratio of cationic demulsifier and nonionic demulsifier reaches 200:1, has abolished the comparatively balanced proportioning of emulsion splitter in the past.
Research shows, the waste emulsified mixture in the applied useless cold-rolled lubricating oil of the present invention field is water-in-oil-type waste emulsified mixture, this profit system can stable existence reason be that the surface of water droplet and solid impurity particle surface, with a large amount of positive charges, form the electrostatic double layer of Stern model.Therefore, select in the present invention a large amount of combinational demulsifiers containing anionic demulsifier can be well in and the positive charge of drop and solid particles surface, be water droplet loss of stability, thereby make water droplet and particle coalescence, breakdown of emulsion.
Flocculation agent according to the present invention is for example, for example, by organic floculant (polyacrylamide, the poly-methyl-prop diluted acid (W6590) of positively charged ion) and composite the forming of organic silicon surfactant (polysiloxane polyether copolymer (1603)).In a preferred embodiment, select the poly-methyl-prop diluted acid (W6590) of positively charged ion and the composite formation flocculation agent of polysiloxane polyether copolymer (1603), both mass ratioes are 20:1, and add-on is 200-300mg/L milk sap.
Research shows, the applied waste emulsified mixture water-content of the present invention is high and contain a large amount of mechanical impuritys, and the polymeric flocculant adding occurs to adsorb and bridging by Van der Waals force, electrostatic attraction, hydrogen bond or coordinate bond and water droplet and solid particulate.Polymeric flocculant has linear structure, and with various active groups, in emulsion with after particle collision, understand its absorption, other groups of polymkeric substance also can come by drawout in solution, adsorb other particles and water droplet, like this, high molecular polymer will play bridge beam action, flco is grown up, and originally stable waste emulsified mixture loss of stability, realizes breakdown of emulsion.
Have again, at petrochemical industry, together with often emulsion splitter being combined with flocculation agent, use, and in the present invention, emulsion splitter and flocculation agent are used step by step.Do like this and how seemed individual step, but in fact demulsification significantly improves, details can be as described later.In addition, use after emulsion splitter to remove water limpid, oil-containing is few, sewage disposal is convenient; On the contrary, use the flocculation dewatering of flocculation agent to contain solid particle polluter, so water colour is muddy, oil content of wastewater is high.From this angle, first breakdown of emulsion, reflocculation, when reaching production object, can significantly reduce sewage disposal difficulty.
Below with reference to an example, illustrate according to the technique of the manipulation of regeneration of waste emulsified mixture of the present invention.
1, raw material (waste emulsified mixture 2030) character:
1) water content: 67.24%, possible scope is 30%～70%
2) solid impurity content: 2.71%, possible scope is 2%～5%
3) ash content: 2.63%, possible scope 2%～5%
Element in ash content, with Fe, Ca is main, concrete analysis sees the following form
Table 1: constituent content
Table 2: the impact of temperature on waste emulsified mixture density and viscosity
The character of table 3:2030 waste emulsified mixture
2. Site Test Scheme
1) waste emulsified mixture is directly squeezed into heating tank from tank car, and waste emulsified mixture is heated to 95～98 ℃ of left and right.
2) configuration water-soluble demulsifier (K-12+TX-10), concentration 8～10%.
3) the waste emulsified mixture by-passing that temperature is reached to 95～98 ℃ (is processed the removal effect to solid impurity for further investigating heat-chemistry, filtering and impurity removing unit has been got rid of in this commerical test, therefore waste emulsified mixture is without filtering and impurity removing unit) importing the first hot slurry tank, amount by 6～8g/L adds water-soluble demulsifier, emulsion splitter fully mixes with waste emulsified mixture by fresh feed pump and the first mixing tank, opens air bubbling and stir 10～15min after reinforced end.
4), at 80～85 ℃ of standing 21h of constant temperature, approximately 3.5 barrels of bottom discharges (630Kg), discharge waste water and are brownish black.
5) emit after open fire, pour middle layer into second hot slurry tank, add flocculation agent (W6590+1603) 200～250mg/L, at 70～75 ℃ of standing 24h of constant temperature.
6) after 24 hours, from upper strata, draw oil sample, import intermediates tank.
7) oil fuel that makes intermediates tank after filtration oil machine is further processed, and obtains product oil fuel.According to index analysis Water in oil amount, mechanical impurity, the ash of the oil fuel index of grading.
3. test result analysis
According to scheme as mentioned above, carry out altogether 5 batches of commerical tests, the results are shown in Table 4.Approximately 9 tons of 2030 waste emulsified mixtures of this test co-processing after 5 days, obtain altogether approximately 2.5 tons of oil fuel in intermediates tank; Discharge altogether 30.5 barrels, approximately 5.5 tons of waste water; In the first and second hot slurry tanks, also have an appointment 2 tons of middle layers still in processing.As the oil fuel (1#) of intermediates, and the oil fuel (2#) that respectively oil machine (80 order filtering net) is once filtered after filtration, and oil fuel (3#) analytical data of circulating filtration, vacuum hydro-extraction is in Table 5.
From commerical test process, the breakdown of emulsion stage, add breakdown of emulsion dosage between 6～8%, demulsification and de-emulsification speed are not had a significant effect, therefore adding dosage is preferably controlled at 7g/L.Due to slurry tank only cone have heating, rest part not heating only has insulation, therefore raw material waste emulsified mixture will be heated in heating tank to 95～98 ℃ of left and right, not so after breakdown of emulsion, flocculation temperature cannot guarantee.From breakdown of emulsion, the flocculating settling experiment that carry out the same period lab oven, actual as long as guarantee 75 ℃ of left and right of waste emulsified mixture bulk temperature, just can meet the requirement of breakdown of emulsion and flocculating settling.From dehydration rate, also can find out, when treatment capacity is fewer, when waste emulsified mixture is only added to conical part, under close temperature condition, because insulation is better, so dehydration rate is also higher; But if treatment capacity is large, even if it is higher to enter the temperature of slurry tank, but because insulation is limited, actual treatment temp is on the low side, and particularly shell portion temperature is on the low side, so dehydration rate is affected.Owing to not arranging draining at night, so the breakdown of emulsion time is long, and from lab oven experiment, breakdown of emulsion is as long as 8～10hr is just enough.The industrial field of one day also shows, adds after emulsion splitter 3.5hr, and the about 600Kg of water outlet, goes out water speed still very fast as can be seen here.Add after flocculation agent, settling temperature is generally at 70～75 ℃, and the settling time is long, and generally, more than 24hr, from laboratory result, if settling temperature is brought up to 80 ℃, the settling time can shorten to 12～16hr.
Approximately 2.7 tons of oil fuel are produced in this commerical test altogether, approximately 9 * (1-0.61-0.06)=3 tons of raw material 2030 waste emulsified mixture oil-containings, therefore
compare with situation known in the art, the rate of recovery significantly improves, and effect is ideal.
Table 4: waste emulsified mixture commercial test results
The about 180Kg of note 1:1 bucket waste water.
Note 2:3.5hr water outlet approximately
bucket, about 600Kg
Note 3:
Table 5: the oil fuel character of intermediates tank
Table 6: the finished product oil fuel character
The product fuel oil properties finally obtaining as can be seen from Table 6, its indices is good, can be applied to obtain the various occasions (as for boiler combustion) of combustion energy completely.
Although above, in conjunction with a preferred embodiment, the present invention is described in detail, it should be understood that those familiar with ordinary skill in the art can make the various modification that are equal to and change completely on the basis of foregoing.For example, aforementioned finished product receiving element can be removed, and directly from product purification unit, obtains final product; The formation of dosage unit can change, and is not limited to the form of tank container and pump, etc.Therefore, protection scope of the present invention should be limited by described claims.
Claims (8)
1. a reclaim equiment for the waste emulsified mixture producing for rolling process, is characterized in that, comprising:
Dosage unit, the described dosage unit various raw materials of annotating, described dosage unit comprises waste emulsified mixture head tank, emulsion splitter feedway and flocculation agent feedway;
Heating unit, described heating unit is connected to dosage unit, and described heating unit receives the raw material from dosage unit, and raw material is heated;
Filtering and impurity removing unit, described filtering and impurity removing unit is connected to described heating unit, described filtering and impurity removing unit receives from the waste emulsified mixture after the heating of heating unit, solid impurity in filtering waste emulsified mixture, and send the waste emulsified mixture after filtration, described filtering and impurity removing unit comprises grade one filter, secondary filter and the magnetic filter connecting successively;
Heat-chemistry processing unit, described heat-chemistry processing unit is connected to described dosage unit and described filtering and impurity removing unit, to carrying out heat-chemistry processing after heating and through the waste emulsified mixture filtering, described heat-chemistry processing unit comprises the first mixing tank, the first hot slurry tank, the second mixing tank and the second hot slurry tank, described the first mixing tank is connected to described filtering and impurity removing unit, described emulsion splitter feedway and described the first hot slurry tank, described the second mixing tank is connected to described flocculation agent feedway, described the first hot slurry tank and described the second slurry tank, and
Product purification unit, described product purification unit is connected to described heat-chemistry processing unit, and described product purification unit receives the emulsion after heat-chemistry is processed, and it is carried out to further refinement treatment.
2. the reclaim equiment of the waste emulsified mixture producing for rolling process as claimed in claim 1, is characterized in that, also comprises: be connected to the finished product receiving element of described product purification unit, described finished product receiving element receives the proper fuel oil making.
3. the reclaim equiment of the waste emulsified mixture producing for rolling process as claimed in claim 1, is characterized in that, described filtering and impurity removing unit is connected to described heating unit by under meter.
4. the reclaim equiment of the waste emulsified mixture producing for rolling process as claimed in claim 1, is characterized in that, described product purification unit comprises intermediates tank and oil filter.
5. a renovation process for the waste emulsified mixture producing for rolling process, is characterized in that, comprises the steps:
A) waste emulsified mixture is sent to heating unit from dosage unit;
B) in described heating unit, waste emulsified mixture is heated to 60～95 ℃;
C) waste emulsified mixture heating is sent to filtering and impurity removing unit from described heating unit, makes it to pass through successively grade one filter, secondary filter and magnetic filter, to remove solid impurity;
D) made the waste emulsified mixture of filtration enter the first mixing tank, mix statically with the emulsion splitter from emulsion splitter feedway there, make mixed solution enter the first hot slurry tank, sedimentation at the temperature of 60～95 ℃, the layering in hot slurry tank of described waste emulsified mixture, the oil on upper strata is sent to intermediates tank, by the assorted sewage disposal device that is sent to of the water of lower floor, and the second mixing tank is sent to in the middle layer of emulsification, wherein, described emulsion splitter is by the sodium lauryl sulphate as anion surfactant with as composite the forming of alkylphenol polyoxyethylene of nonionic demulsifier,
E) middle layer of described emulsification is mixed in the second mixing tank with the flocculation agent from flocculation agent feedway, make again mixed solution enter the further thermal subsidence dehydration of the second hot slurry tank, sedimentation at the temperature of 60～95 ℃, the oil on generated upper strata is sent to intermediates tank, be sent to sewage disposal device wherein by the water of lower floor is assorted, described flocculation agent is by the poly-methyl-prop diluted acid of the positively charged ion as organic floculant with as composite the forming of polysiloxane polyether copolymer of organic silicon surfactant; And
F) oil in described intermediates tank is carried out to refinement treatment.
6. the renovation process of the waste emulsified mixture producing for rolling process as claimed in claim 5, is characterized in that, the hot settling temperature in described the first hot slurry tank and described the second hot slurry tank is 80～85 ℃.
7. the renovation process of the waste emulsified mixture producing for rolling process as claimed in claim 5, is characterized in that, the mass ratio of described sodium lauryl sulphate and described alkylphenol polyoxyethylene is 200:1, and add-on is 6-10g/L milk sap.
8. the renovation process of the waste emulsified mixture producing for rolling process as claimed in claim 5, is characterized in that, the mass ratio of the poly-methyl-prop diluted acid of described positively charged ion and described polysiloxane polyether copolymer is 20:1, and add-on is 200-300mg/L milk sap.
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| CN105316098A (en) * | 2014-05-27 | 2016-02-10 | 宝山钢铁股份有限公司 | Method for treating rolling waste lubricating oil with aluminum flocculant |
| CN106145426B (en) * | 2015-03-31 | 2019-04-09 | 中国科学院过程工程研究所 | Carbolic oil joint removing system and treatment process in a kind of coal chemical industrial waste water |
| CN108659945B (en) * | 2017-03-30 | 2021-08-17 | 宝山钢铁股份有限公司 | Magnetic filtration type impurity treatment method for cold rolling unit emulsion |
| CN109536202A (en) * | 2017-09-22 | 2019-03-29 | 唐山寰通源生物柴油科技有限公司 | A kind of preprocess method of cold-rolling oil Preparation of Biodiesel from Waste Oils raw material |
| CN108613200B (en) * | 2018-06-29 | 2024-03-12 | 宝武集团环境资源科技有限公司 | Pretreatment system and pretreatment method for oil-containing waste liquid of steel rolling system before incineration disposal |
| CN210367413U (en) * | 2018-12-10 | 2020-04-21 | 岳阳长岭设备研究所有限公司 | Dirty oil fatlute dehydration takes off solid processing apparatus |
| CN114671563A (en) * | 2022-03-11 | 2022-06-28 | 阳春新钢铁有限责任公司 | Pretreatment system used before incineration disposal of oily waste liquid of steel rolling system |
| CN114768375A (en) * | 2022-05-21 | 2022-07-22 | 佛山市瑞丰恒业机械有限公司 | Emulsion filtering circulation system for processing lithium battery shell |
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| CN101311127B (en) * | 2008-04-16 | 2011-08-31 | 北京清大国华环保科技有限公司 | Method and device for treating a great variety of waste emulsion of high concentration using hyperfiltration membrane method |
| CN203333614U (en) * | 2013-05-30 | 2013-12-11 | 上海宝钢废旧油处理有限公司 | Regenerating device for waste emulsified liquid generated in steel rolling process |
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