CN103361165A - 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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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 that produces in the rolling process.
Background technology
Rolling is to utilize roll metal stock to be rolled into the pressure processing craft of all size sheet material.Usually cool off, lubricate rolled piece with emulsion in the System on Rolling Steel.Rolling emulsion requires to have good cooling and lubricating performance, chemical stability and rustless property, it is as the basis and add various additives take mineral oil, formation contains rust-preventive agent, emulsifying agent, defoamer, antioxidant etc., the mineral oil-water mixed liquid with 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 gradually aged deterioration of oil product, so must change after using certain hour.The waste emulsified mixture complex chemical composition, water and foreign matter content are high, and the emulsification degree is serious, and stable chemical nature brings very large difficulty for subsequent disposal and recycling.
Specifically, the waste emulsified mixture (or being called useless cold-rolled lubricating oil) that produces of rolling process has following characteristics:
(1) water content is high: the water content of this waste emulsified mixture is 20%～70%, is no more than 5% and other kind waste lubricating oil is moisture.
(2) emulsifier content is high: because cold-rolled lubricating oil must have suitable emulsifying stability, so emulsifier content wherein is 10%～15%.Dehydration brings very big difficulty to high emulsifier content to waste liquid.
(3) greasy filth and gum level are high: because the applying working condition of cold-rolled lubricating oil is harsh, oil product is by repeatedly heating and cooling, so that oil product is easy to oxidation.The further accelerating oxidation of high-moisture of emulsion is simultaneously also easily received the infringement of microorganism, so the products of metamorphism in the waste emulsified mixture is many especially.
For the characteristics of above-mentioned waste emulsified mixture, adopted at present processing and processing mode as described below in the industry.
The people such as Liu Jiafa (see also " 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, the oil product oil that acts as a fuel uses after the regeneration.
The people such as Sun Xiaofeng (see also " 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 ") adopt the ceramic membrane of 0.2 μ m to carry out regeneration tests for waste internal-combustion engine oil.Studies show that Ceramic Membranes Separating Technique can effectively remove metal ion, mechanical impurity and the moisture etc. in the waste oil.But the waste lubricating oil viscosity is large, and the 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:
Precipitation → centrifugation → cohesion is made with extra care → bleaching earth adsorption → filtration → lubricating base oils.
Precipitation: purpose is to remove most of moisture and the impurity in the waste emulsified mixture.Waste emulsified mixture is heated to 60-80 ℃ in the homemade setting tank of heating, precipitate 1-2 days, and the moisture impurity clearance can reach 90%.
Centrifugation: waste emulsified mixture is after precipitation, and with the further separating oil of settling centrifuge, water, slag, centrifuge speed is 1500-2000r/min again, and the centrifugation time is 15-20min.
Cohesion is refining: purpose is to make that the insolubless such as colloid, bituminous matter and hydrocarbon oxide condense, throwing out, thus the precipitating separation.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 the waste emulsified mixture, pitch.
Bleaching earth adsorption: further remove the impurity such as medium pitch, colloid that deoil by the bleaching earth adsorption processing, 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 heavy 5-10% of oil; Reaction times is generally 30～60min.
Filter: this is the finishing operation of waste emulsified mixture regeneration, also is the key link of removing carclazyte, colloid and various impurity.This process using plate-and-frame filter press is done medium with filter cloth, makes oil purification by press filtration.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 that reclaims by above-mentioned technique can be used as lubricating base oils.
In addition, the most generally adopt the mode that adds sulfuric acid or phosphoric acid to process waste emulsified mixture in this area at present, do like this can be after processing waste water in comprise the disadvantageous acid of environment, and it is not high to reclaim quality and the rate of recovery of the oil that obtains 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 coming 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 the 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 that produces 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;
The filtering and impurity removing unit, the filtering and impurity removing unit is connected to heating unit, the filtering and impurity removing unit receives from the waste emulsified mixture after the heating of heating unit, solid impurity in the filtering waste emulsified mixture, and send waste emulsified mixture after the filtration, the filtering and impurity removing unit comprises grade one filter, secondary filter and the magnetic filter that connects successively;
The heat-chemistry processing unit, the heat-chemistry processing unit is connected to dosage unit and filtering and impurity removing unit, to carrying out the heat-chemistry processing after heating and through the waste emulsified mixture that filters, the 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
The product purification unit, the product purification unit is connected to the heat-chemistry processing unit, and the product purification unit receives through the emulsion after the heat-chemistry processing, and it is carried out further refinement treatment.
Preferably, also comprise: be connected to the finished product receiving element of product purification unit, the finished product receiving element receives the proper fuel oil that makes.
Preferably, the emulsion splitter feedway comprises emulsion splitter tank and emulsion splitter injection device, and the flocculation agent feedway comprises flocculation agent tank and flocculation agent injection device.
Preferably, the filtering and impurity removing unit is connected to heating unit by under meter.
Preferably, the product purification unit comprises intermediates tank and oil filter.
The present invention also provides a kind of renovation process of the waste emulsified mixture that produces 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 ℃;
The waste emulsified mixture that c) will heat is sent to the filtering and impurity removing unit from heating unit, makes it to pass through successively grade one filter, and secondary filter and magnetic filter are to remove solid impurity;
D) waste emulsified mixture that filters was entered into the first mixing tank, mix statically with emulsion splitter from the emulsion splitter feedway there, make mixed solution enter the first hot slurry tank, sedimentation under 60～95 ℃ temperature, waste emulsified mixture layering in hot slurry tank, the oil on upper strata is sent to the intermediates tank, the water of lower floor is mixed be sent to sewage disposal device, and the second mixing tank is sent in the middle layer of emulsification;
E) middle layer of emulsification is mixed in the second mixing tank with flocculation agent from the flocculation agent feedway, make again mixed solution enter the further thermal subsidence dehydration of the second hot slurry tank, sedimentation under 60～95 ℃ temperature, the oil on the upper strata that generates is sent to the intermediates tank, with the assorted sewage disposal device that is sent to of the water of lower floor; And
F) oil in the middle products pot is carried out refinement treatment.
Preferably, also comprise: after step f), the oil after the refinement treatment is sent to the 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 forming as the sodium lauryl sulphate of anion surfactant with as the alkylphenol polyoxyethylene of nonionic demulsifier is composite.
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 forming as the poly-methyl-prop diluted acid of the positively charged ion of organic floculant with as the polysiloxane polyether copolymer of organic silicon surfactant is composite.
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 that produces in the rolling process being carried out 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.
Description of drawings
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 show according to the present invention preferred embodiment, be applied to the reclaim equiment of the waste emulsified mixture (useless cold-rolled lubricating oil) that produces in the rolling process especially, 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, dosage unit is used for annotating various raw materials.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, be used for to receive 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.
The filtering and impurity removing unit preferably is connected to heating unit by under meter 3, is used for receiving from the waste emulsified mixture after the heating of heating unit, and the solid impurity in the filtering waste emulsified mixture, and the waste emulsified mixture after will filtering is sent to the 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, the conventional filter type of many employings comes the solid impurity in the filtering waste emulsified mixture, exists the filtration pressure drop large, the shortcoming that filtration velocity is slow.The present invention is arranged on the filtering and impurity removing unit before the heat-chemistry processing unit described later, rather than is arranged on after the chemical treatment as some prior art.The 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, just in foodstuffs industry, be used widely before this magnetic filter, be used for removing metallic impurity, generally believe then that in other chemical process process field its filtration efficiency is low, nobody is applied.Yet the application's applicant finds, adds the step that magnetic filters after the single filter that suitably configures and cascade filtration, can significantly improve filtration efficiency and effect.
The heat-chemistry processing unit is connected to dosage unit and filtering and impurity removing unit, is used for carrying out the heat-chemistry processing after heating and through the waste emulsified mixture that filters.The heat-chemistry processing unit for example comprises the first mixing tank 5, the first hot slurry tank 8, 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, mix statically in the first mixing tank 5 from the waste emulsified mixture of filtering and impurity removing unit with from the emulsion splitter of emulsion splitter feedway, then be 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, mix statically in the second mixing tank 9 from the emulsion of the first hot slurry tank 8 with from the flocculation agent of flocculation agent feedway, then be 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 come emulsion is carried out the heat-chemistry processing.This step-by-step processing in conjunction with the special emulsion splitter and the flocculation agent that adopt, has significantly improved efficient and the effect processed.This will be described in further detail in the elaboration to method hereinafter.
The product purification unit is connected to the heat-chemistry processing unit, is used for receiving the emulsion through after the heat-chemistry processing, and it is carried out further refinement treatment.Described product purification unit for example comprises intermediates tank 13 and oil filter 14.14 pairs of oil products from the intermediates tank of oil filter carry out vacuum hydro-extraction further, thereby obtain proper fuel oil.
The finished product receiving element is connected to the product purification unit, is used for receiving the proper fuel oil that makes.Described finished product receiving element for example comprises products pot 15.
Below will specifically describe method how to utilize equipment of the present invention to come the processing treatment waste emulsified mixture.
The method that the present invention adopts physical sepn-chemical refining to combine is come the processing treatment waste emulsified mixture, and its technical process roughly is as follows:
Stock oil → heating unit → filtering and impurity removing unit → heat-chemistry processing unit → product purification unit → finished product receiving element
At first, waste emulsified mixture is pumped into heating tank 2 from head tank 1, is heated to 60～95 ℃ (preferred 80～85 ℃) at heating tank.
Then, again through under meter 3 meterings, through the filtering and impurity removing unit, make it successively by grade one filter 41 the waste emulsified mixture pumping, secondary filter 42 and magnetic filter 43 are removed solid impurity.In the present invention, be the filtration of before heat-chemistry is processed, namely carrying out solid impurity, test shows does the effect that has significantly improved chemical demulsification like this, and according to one's analysis, this may be to realize owing to having reduced the impact of solid particulate on the waste emulsified mixture breaking emulsion and dewatering.Specifically, may be that the positive charge that the solid impurity particle surface carries can consume part emulsion splitter and/or flocculation agent, thereby affect the effect of heat-chemistry breakdown of emulsion, the filtering solid particulate of therefore going ahead of the rest can significantly improve the effect of heat-chemistry breakdown of emulsion.In addition, the present invention adopts classified filtering, in the present embodiment, uses first grade one filter 41 filtering macrobead solid impurities (60 order), use again secondary filter 42 filtering solid small particles impurity (150 order), use at last the more tiny solid impurity of magnetic filter 43 filterings.This configuration is based on applicant's discovery as described below, that is, the main component of the solid impurity that granularity is less is iron, adopts this area to carry out the last step filtration from original magnetic filter and can greatly improve filtration efficiency.And, via the filtration treatment of this magnetic filter, even remaining solid impurity is arranged, also can avoid owing to being magnetized the adsorbed oil molecule, thereby significantly strengthen demulsification.
Follow again, make the waste emulsified mixture after the after filtration removal of impurity enter the first mixing tank 5, mix statically with emulsion splitter from the emulsion splitter feedway there.Make mixed solution enter the first hot slurry tank 8, in 60～95 ℃ of (preferred 80～85 ℃) sedimentations 12～36 hours (preferred 24 hours).Waste emulsified mixture layering in hot slurry tank forms upper strata, middle layer and lower floor.Wherein, the upper strata is moisture less than 5% oil, sends into intermediates tank 13 by slurry tank top discharge nozzle.Lower floor mainly is moisture impurity (being called for short water assorted), and the pH value is 6～8, and is light yellow transparent, and oleaginousness can directly enter sewage disposal device less than 300mg/L.Have one deck Middle emulsion layer in the middle of oil reservoir and water layer, it is black, water content at 20%～50%(generally 30～40%).Specifically, when being chocolate such as wastewater disposition, show that sewage discharge is complete, be Middle emulsion layer this moment.Middle emulsion layer is mixed in the second mixing tank 9 statically with flocculation agent from the flocculation agent feedway.Make again subsequently mixed solution enter the second hot slurry tank 10 further thermal subsidence dehydrations, in 60～95 ℃ of temperature (preferred 80～85 ℃) sedimentation 12～36 hours (preferred 24 hours), the top that generates is moisture less than 5% oil, send into the intermediates tank by slurry tank top discharge nozzle, and bottom discharge water is chocolate, discharges after the further flocculation treatment of need again and enters sewage apparatus.
At last, with oil filter the oil product in the middle products pot 15 is carried out further vacuum hydro-extraction and process, obtain proper fuel oil thereby filter.
In the manipulation of regeneration equipment and process (method) of waste emulsified mixture of the present invention, except aforesaid difference in the past filtering and impurity removing and adopt emulsion splitter and the step-by-step processing of flocculation agent, also selected especially heat sink chemical demulsifier and the flocculation agent of falling of the useless cold-rolled lubricating oil that is specially adapted to rolling process that obtains after the applicant studies for a long period of time, this also is a very important aspect of the present invention.
Emulsion splitter according to the present invention is by anion surfactant (for example 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 as anion surfactant sodium lauryl sulphate (K-12) 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.The mass ratio of cationic demulsifier and nonionic demulsifier reaches 200:1 in emulsion splitter of the present invention, has abolished the in the past comparatively balanced proportioning of emulsion splitter.
Studies show that, the waste emulsified mixture in the applied useless cold-rolled lubricating oil of the present invention field is the 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 form the electrostatic double layer of Stern model with a large amount of positive charges.Therefore, select in the present invention the combinational demulsifier that contains in a large number anionic demulsifier can be well in and the positive charge of drop and solid particles surface, be the water droplet loss of stability, thereby make water droplet and particle is poly-also, breakdown of emulsion.
Flocculation agent according to the present invention is by organic floculant (for example polyacrylamide, the poly-methyl-prop diluted acid (W6590) of positively charged ion) and composite the forming of organic silicon surfactant (for example 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.
Studies show that, 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 of adding is by Van der Waals force, electrostatic attraction, hydrogen bond or coordinate bond and water droplet and solid particulate generation absorption and bridging.Polymeric flocculant has linear structure, and with various active groups, in emulsion with behind the 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 the effect of bridge, flco is grown up, and originally stable waste emulsified mixture loss of stability is realized breakdown of emulsion.
Have again, at petrochemical industry, often emulsion splitter and flocculation agent are combined together use, and in the present invention, emulsion splitter and flocculation agent are used step by step.Do so how seemed individual step, but in fact demulsification significantly improves, details can be as described later.In addition, use after the emulsion splitter to remove water limpid, oil-containing is few, sewage disposal is convenient; On the contrary, use the flocculation dewatering of flocculation agent then 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 the production purpose, can significantly reduce the sewage disposal difficulty.
Below with reference to an example technique according to the manipulation of regeneration of waste emulsified mixture of the present invention is described.
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 the ash content, with Fe, Ca is main, concrete analysis sees the following form
Table 1: constituent content
Table 2: temperature is on the impact of 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 about 95～98 ℃.
2) configuration water-soluble demulsifier (K-12+TX-10), concentration 8～10%.
3) the waste emulsified mixture by-passing that temperature is reached 95～98 ℃ (is investigated the heat-chemistry processing to the removal effect of solid impurity for further, the filtering and impurity removing unit has been got rid of in this commerical test, therefore waste emulsified mixture is without the 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 the air bubbling behind reinforced the end and stirs 10～15min.
4) leave standstill 21h at 80～85 ℃ of constant temperature, bottom discharge is 3.5 barrels (630Kg) approximately, discharges waste water and is brownish black.
5) emit open fire after, pour the middle layer into second hot slurry tank, add flocculation agent (W6590+1603) 200～250mg/L, leave standstill 24h at 70～75 ℃ of constant temperature.
6) after 24 hours, draw oil sample from the upper strata, import the intermediates tank.
7) oil fuel that makes the 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.This test co-processing is 9 ton of 2030 waste emulsified mixture approximately, after 5 days, obtains altogether approximately 2.5 tons of oil fuel in the intermediates tank; Discharge altogether 30.5 barrels, approximately 5.5 tons of waste water; 2 tons of middle layers also have an appointment in the first and second hot slurry tanks still in processing.As the oil fuel (1#) of intermediates, and the oil fuel (2#) that once filters of oil machine (80 order filtering net) after filtration respectively, oil fuel (3#) analytical data that reaches circulating filtration, vacuum hydro-extraction sees Table 5.
From the commerical test process, the breakdown of emulsion stage, add breakdown of emulsion dosage between 6～8%, on demulsification and not obviously impact of de-emulsification speed, therefore adding dosage preferably is controlled at 7g/L.Because slurry tank only cone has heating, rest part not heating only has insulation, therefore the raw material waste emulsified mixture will be heated in heating tank about 95～98 ℃, and not so breakdown of emulsion, flocculation temperature can't guarantee later on.Test as seen from breakdown of emulsion, the flocculating settling that carry out the same period lab oven at, actual as long as guarantee about 75 ℃ of waste emulsified mixture bulk temperatures, just can satisfy the requirement of breakdown of emulsion and flocculating settling.Also can find out from dehydration rate, when treatment capacity was fewer, when waste emulsified mixture only was added to conical part, under close temperature condition, because insulation better, so dehydration rate was also higher; If but treatment capacity is large, even it is higher to enter the temperature of slurry tank, but because insulation is limited, and actual treatment temp is on the low side, particularly the shell portion temperature is on the low side, so dehydration rate is affected.Owing to do not arrange the draining at night, so the breakdown of emulsion time is long, from the lab oven at experiment as seen, breakdown of emulsion is as long as 8～10hr is just enough.The industrial field of one day also shows, add emulsion splitter 3.5hr after, water outlet is 600Kg approximately, this shows out that water speed is still very fast.After adding flocculation agent, generally at 70～75 ℃, the settling time is long for settling temperature, and generally more than 24hr, from laboratory result, if settling temperature is brought up to 80 ℃, then 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
Annotate approximately 180Kg of 1:1 bucket waste water.
Annotate the 2:3.5hr water outlet approximately
Bucket, approximately 600Kg
Annotate 3:
Table 5: the oil fuel character of intermediates tank
Table 6: the finished product oil fuel character
The product fuel oil properties that finally obtains as can be seen from Table 6, its indices is good, can be applied to need to obtain the various occasions (as being used for boiler combustion) of combustion energy fully.
Although abovely 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 on the basis of foregoing the various modification that are equal to and change fully.For example, aforementioned finished product receiving element can be removed, and directly obtains final product from the product purification unit; 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 (12)
1. a reclaim equiment that is used for the waste emulsified mixture that rolling process produces 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;
The 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 the filtering waste emulsified mixture, and send waste emulsified mixture after the filtration, described filtering and impurity removing unit comprises grade one filter, secondary filter and the magnetic filter that connects successively;
The 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 the heat-chemistry processing after heating and through the waste emulsified mixture that filters, 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 the described first hot slurry tank, and described the second mixing tank is connected to described flocculation agent feedway, the described first hot slurry tank and described the second slurry tank; And
The product purification unit, described product purification unit is connected to described heat-chemistry processing unit, and described product purification unit receives through the emulsion after the heat-chemistry processing, and it is carried out further refinement treatment.
2. the reclaim equiment of the waste emulsified mixture that produces 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 that makes.
3. the reclaim equiment of the waste emulsified mixture that produces 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 that produces 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 that is used for the waste emulsified mixture that rolling process produces 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 ℃;
The waste emulsified mixture that c) will heat is sent to the filtering and impurity removing unit from described heating unit, makes it to pass through successively grade one filter, and secondary filter and magnetic filter are to remove solid impurity;
D) waste emulsified mixture that filters was entered into the first mixing tank, mix statically with emulsion splitter from the emulsion splitter feedway there, make mixed solution enter the first hot slurry tank, sedimentation under 60～95 ℃ temperature, the layering in hot slurry tank of described waste emulsified mixture, the oil on upper strata is sent to the intermediates tank, the water of lower floor is mixed be sent to sewage disposal device, and the second mixing tank is sent in the middle layer of emulsification;
E) middle layer of described emulsification is mixed in the second mixing tank with flocculation agent from the flocculation agent feedway, make again mixed solution enter the further thermal subsidence dehydration of the second hot slurry tank, sedimentation under 60～95 ℃ temperature, the oil on the upper strata that generates is sent to the intermediates tank, with the assorted sewage disposal device that is sent to of the water of lower floor; And
F) oil in the described intermediates tank is carried out refinement treatment.
6. the renovation process of the waste emulsified mixture that produces for rolling process as claimed in claim 5 is characterized in that, the hot settling temperature in the described first hot slurry tank and the described second hot slurry tank is 80～85 ℃.
7. the renovation process of the waste emulsified mixture that produces for rolling process as claimed in claim 5 is characterized in that, described emulsion splitter is by anion surfactant and nonionogenic tenside is composite forms.
8. the renovation process of the waste emulsified mixture that produces for rolling process as claimed in claim 7, it is characterized in that, described emulsion splitter is by forming as the sodium lauryl sulphate of anion surfactant with as the alkylphenol polyoxyethylene of nonionic demulsifier is composite.
9. the renovation process of the waste emulsified mixture that produces for rolling process as claimed in claim 8 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.
10. the renovation process of the waste emulsified mixture that produces for rolling process as claimed in claim 5 is characterized in that, described flocculation agent is by organic floculant and organic silicon surfactant is composite forms.
11. the renovation process of the waste emulsified mixture that produces for rolling process as claimed in claim 10, it is characterized in that, described flocculation agent is by forming as the poly-methyl-prop diluted acid of the positively charged ion of organic floculant with as the polysiloxane polyether copolymer of organic silicon surfactant is composite.
12. the renovation process of the waste emulsified mixture that produces for rolling process as claimed in claim 11, it 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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| CN106145426A (en) * | 2015-03-31 | 2016-11-23 | 中国科学院过程工程研究所 | In a kind of coal chemical industrial waste water, carbolic oil is combined removing system and processes technique |
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| CN108659945A (en) * | 2017-03-30 | 2018-10-16 | 宝山钢铁股份有限公司 | A kind of Magnetic filter formula impurity treatment method of cold mill complex 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 |
| CN110282855A (en) * | 2018-12-10 | 2019-09-27 | 岳阳长岭设备研究所有限公司 | The de- solid processing unit of sump oil greasy filth dehydration and its treatment process |
| 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 |
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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 |
| CN106145426A (en) * | 2015-03-31 | 2016-11-23 | 中国科学院过程工程研究所 | In a kind of coal chemical industrial waste water, carbolic oil is combined removing system and processes technique |
| 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 |
| CN108659945A (en) * | 2017-03-30 | 2018-10-16 | 宝山钢铁股份有限公司 | A kind of Magnetic filter formula impurity treatment method of cold mill complex emulsion |
| 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 |
| CN108613200A (en) * | 2018-06-29 | 2018-10-02 | 宝武集团环境资源科技有限公司 | For pretreatment system and its method before rolling system oily waste liquor incineration disposal |
| 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 |
| CN110282855A (en) * | 2018-12-10 | 2019-09-27 | 岳阳长岭设备研究所有限公司 | The de- solid processing unit of sump oil greasy filth dehydration and its treatment process |
| 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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