CN108383353A - A kind of useless sludge treatment technology of oil-containing grinding - Google Patents
A kind of useless sludge treatment technology of oil-containing grinding Download PDFInfo
- Publication number
- CN108383353A CN108383353A CN201810366061.8A CN201810366061A CN108383353A CN 108383353 A CN108383353 A CN 108383353A CN 201810366061 A CN201810366061 A CN 201810366061A CN 108383353 A CN108383353 A CN 108383353A
- Authority
- CN
- China
- Prior art keywords
- oil
- machine
- knob
- mud
- grinding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
Abstract
The invention discloses a kind of oil-containings to be ground sludge treatment technology of giving up, and oil-containing is ground to the mud that gives up and is handled successively by following process：(1) it screens；(2) centrifuge takes off liquid；(3) alkali cleaning；(4) press filtration is cleaned.The present invention meets the requirement of harmless treatment of the useless mud of oil-containing grinding as the hazardous waste with utility value, production process pollutant emission is controllable, the useless mud of grinding after disposition reaches the standard of comprehensive utilization, it realizes comprehensive utilization of resources, turn waste into wealth, reach the maximization of economic benefit, social benefit, wherein：(1) treatment process environmental protection of the present invention；(2) treatment process economy of the present invention；(3) treatment process of the present invention is safe and energy saving；(4) process operations of the present invention are easy, are convenient for industrialized production；(5) fat content≤0.5% of finished product of the present invention, is up to state standards《Scrap iron and steel》In requirement for impurity content.
Description
Technical field
The present invention relates to Industrial Solid Waste technical field of comprehensive utilization, and in particular to a kind of useless sludge treatment technology of oil-containing grinding.
Background technology
In the grinding process of bearing machining, a large amount of useless mud of oil-containing grinding will produce.It is this kind of by the environmental regulation of country
Grinding gives up mud due to containing waste mineral oil, belongs to hazardous waste, and hazardous waste is not allowed arbitrarily to deposit by stringent management and control
It puts, transport and disposes.But actual conditions are, due to no relevant disposal site, some entity and individual are a few years ago by this
A little useless mud of grinding are pulled out from useless mud production unit, as the raw material of ironmaking, steel plant are directly sold to, from legal procedure
It is illegal, by current law, 3 tons of hazardous waste of processing or more will enter punishment.And environmental protection supervise and examine now is more and more tighter,
Do not allow illegally to dispose this kind of useless mud.
Currently, not there is the suitable treatment process specifically for this kind of useless mud also, in R＆D process, it is useless oil field has been used for reference
The treatment process of greasy filth, is now summarized as follows：
Oily sludge is the oily solid sludge generated during oil exploitation, transport, refining and oily waste water treatment.
For general oil content 10~50%, moisture content generates 80 every year on average in 40~90%, China's oil chemical industries in sludge
Ten thousand t tank bottoms mud, bottom of pond mud, Shengli Oil Field generate oily sludge at 100,000 tons or more every year, and Dagang Oilfield generates every year contains greasy dirt
About 150,000 tons of mud, Henan Oil Field generates 5 × 10 every year4m3Oily sludge.In oily sludge containing a large amount of benzene homologues, phenols,
The noxious material of the foul smellings such as anthracene, pyrene not only occupies a large amount of arable lands if not being pocessed direct emission, and to surrounding soil,
Water body, air will all pollute, and the huge sum of money such as a large amount of pathogen, parasite (ovum), copper, zinc, chromium, mercury is also contained in sludge
Belong to, the poisonous and harmful substance difficult to degrade such as salt and Polychlorinated biphenyls, dioxin, radionuclide.Currently, oil sludge and sand oneself through quilt
Country is classified as hazardous waste.
Since the mid-80, the developed countries such as the U.S., Japan, Germany, former Soviet Union begin one's study efficient low-consume processing
The method and technique of greasy filth.The method of processing oily sludge generally has both at home and abroad now：Burning method, biological treatment, hot wash are washed
Method, solvent extraction, chemical demulsification method, solid-liquid isolation method etc..Although there are many method of processing, all because specific aim is not strong, place
The shortcomings of of high cost is managed not promote.Integrated treatment that is innoxious, cleaning and recycle wherein resource is carried out to oily sludge, at
For one of the emphasis of home and abroad environment protection and petroleum industry.
(1) burning method
France, German petroleum chemical enterprise mostly use the mode of burning, and sludge first passes through modulation and dehydration pre-process, after concentration
Sludge dehydrated again through equipment, mud cake is sent to incinerator and is burned, lime-ash is for repairing the roads or be embedded to specified lime-ash
Landfill yard, the thermal energy for burning generation generate electricity for heat supply.The process object of burning is mainly greasy filth of the oil content 5~10%,
Incineration temperature general control burns time control in 0.5~1.5h, using 50~100% excess airs at 800~1000 DEG C.
China's overwhelming majority oil plant all has sludge incineration device, the downflow type used such as Hubei Jingmen petrochemical plant, Chang Ling petrochemical plant
Rotary incinerator；The fluidized bed incinerator that Yanshan Petrochemical uses.Oily sludge is after burning disposal, and multiple harmful substances are almost
It all removes, works well.But its invest it is big, it is of high cost, combustion-supporting fuel need to be often added, with serious air in burning process
Pollution, and crude oil cannot be recycled, so the practical efficiency in China's incinerator is relatively low.
Burning experiment is carried out to greasy filth using rotary incinerator, the results showed that oil content only has in ash content after burning
0.3%, fuel consumption average out to 18.5kg/t is burned, the sulfur dioxide and particle concentration in cyclone entrance flue gas is not up to
To national standard, need to be further processed through spray column can reach discharge standard.
(2) heat chemistry washing method
Hot water washing is the method that U.S.EPA processing oily sludge preferentially uses, and is mainly used for more particles containing silt
The processing of big oily sludge.It is generally washed repeatedly with thermokalite aqueous solution, then is realized and be separated by solid-liquid separation by air supporting.Wash temperature is more
Control is at 70 DEG C or so, and liquid-solid ratio 2: l, oil content can be that 30% ground sludge is washed till residual oil content l% by wash time 20min
Below.Mixed base can be made of cheap inorganic base and inorganic salts.This method energy expenditure is low, and expense is not high, is that China is current
Study process for treating oil-containing sludge that is more, more generally using.
Vast stretch of wooded country English etc. using chemico-heating wash multi-stage separation treatment process oil field ground sludge, by washing temperature, when
Between, solid-to-liquid ratio, pH value list because rope test and orthogonal experiment analysis, determine hot wash temperature 60~80 DEG C between, greasy filth and water
Mass ratio be 1: 5~1: 7, hot wash time 30min, pH value is appropriate between 9~11.It is tested by Chemicals, it is believed that
DL-100 is preferable to suspension greasy filth demulsification, and sodium metasilicate aqueous slkali has preferable cleaning performance to tank bottom mud.In optimised process
Under the conditions of, the oil removal rate for measuring ground sludge is 96%.
The heat chemistry cleaning of oily sludge is a complicated dynamics multiphase flow process.Technological parameter and chemical agent are
Two big key points and difficulties, the screening for cleaning chemical agent are related to material migration and separation etc. factor.
Zeng Hongde etc. studies the chemical agent in greasy filth cleaning, under optimum process condition, chooses ten
A kind of chemical agent carries out Chemicals and combine experiment.The result shows that anion surfactant AEO-9, NP-10 and dispersion
The cleaning performance of agent sodium metasilicate is preferable, and the residual oil content after washing is all below 2%.Combine experiment also is carried out to above-mentioned three kinds of medicaments,
The formula of optimal clean agent is determined：①3(AEO-9)：1(NP-10)：6(Na2SiO3)；②1(AEO-9)：3(NP-10)：6
(Na2SiO3), it is upper two kinds formula can make wash-off mud residual oil content can be down to 4% hereinafter, and the sodium metasilicate in confection to medicament
Cleaning performance be affected.
(3) thermal desorption
Thermal desorption is a kind of sludge high temperature processing method of remodeling.Greasy filth is heated to certain temperature under anoxic condition makes hydrocarbon
Class and organic matter desorption.The early 1990s technique is rapidly developed and is applied in foreign countries, is primarily adapted for use in processing oil
Content is more than 30% oily sludge.The technique have higher technology content, it is more demanding to reaction condition, processing cost compared with
Height, operation is also more complicated, and it is still necessary to further perfect.
The TERMTEch thermal desorption techniques of company of Statoil are equipped in the reactor of close steel blade rotor at one,
Sludge is heated to 399 DEG C from 299 DEG C, and is passed through steam, so that hydro carbons is detached in complicated hydration and cracking reaction, and be condensed back to
It receives.These techniques can from mud cake oil recovery, hydrocarbon content is less than 500mg/L in the dry body refuse of residue.
Wang Wanfu etc. has carried out pyrolysis processing laboratory experiment to oil field and oil refining oily sludge, determines recycling oil gas group
At, pyrolysis residue phosphorus content and Al2O3Content shows the oil productivity of oily sludge pyrolysis up to 10% or more, and recycling oil cut rate is high,
The quality of pyrolysis oil is preferable.Also generate certain non-condensable hydrocarbon gas simultaneously；Pyrolyzing sludge residue phosphorus content is high, in oil product
Pitch has preferable adsorption and decoloration；Al in residue2O3Content is up to 20% or more, through the molten preliminary regeneration treatment of acid, to dirt
Water has preferable flocculation.
(4) solvent extraction
Solvent extraction is a kind of handling the effective technology of the oily sludge of the small oil-containing of the more particles of silt 10%~20%.
The technology utilization extractant dissolves oily sludge, and after agitated and centrifugation, most of organic matter and oil are extracted agent from mud
It extracts；Then recycling extract liquor, which spouts to go to distill, separates solvent from mixture recycling, and oil recovery is then used for
Freshening.Solvent extraction generally carries out at room temperature, and solvent is better than bigger effect of extracting, but solvent is than the load of big extraction equipment
Become larger, energy consumption is relatively large.Oily sludge after extraction is handled through distillation again, can effectively deviate from the weight in oily sludge
Oil, de-oiling rate is up to 90% or more.Due to of high cost, extraction is applied to refinery's disposal of oily sludge not yet, exploitation
Going out the high extractant of the ratio of performance to price becomes the key of technique development.
A kind of technological experiment handling oily sludge using one steam distillation of chloroform solvent extraction such as Zhang Xiuxia.Oil-containing
After sludge dewatering, natural air drying removes impurity removing, crushes.Sludge is dissolved with chloroform, then at 320~480 DEG C, pressure
Steam distillation de-oiling experiment is carried out under 0.2MPa.It is extracted the result shows that 3 times of extractant is added in oily sludge, then
After adding the water of 0.5ml to distill 45min at 400 DEG C by 1g greasy filth, de-oiling rate is up to 80~90%.
Sun Xiangdong etc. makees extractant with the 120# solvent naphthas that Shenghua refinery produces, and at 60 DEG C, greasy filth mass ratio is 5:
1, multi-purpose station high extraction processing containing sludge from oil tank showed to Shengli Oil Field Hao of oil content 30%, oily recovery rate is reachable in greasy filth
99.7%, oil content is less than 0.5% in remaining mud.
(5) eddy flow technique
Eddy flow technique is the preferable technique that the aqueous high concentration of sediment of processing lacks the small oily sludge of particle.Cyclonic separation is to centrifuge
The density contrast between medium, a kind of method that dispersed phase is separated from continuous canopy, dispersed phase are utilized in the field of force to be
Solid particle can also be drop, and continuous phase can be that gas can also be liquid.
The German refineries OMW and ESSO companies handle oily sludge using triphase horizontal screw centrifuge.This technique is oil
Mud is heated to 60~80 DEG C, and stirs or be added organic flocculant in advance, and treating capacity reaches 60m3/ h can effectively close oily sludge
At three-phase, wherein solid phase body refuse solid content 36%, oil content 10%；Water phase oil content 2%, solid content 1%；Oil phase oil-containing
95%, moisture content 4.5%, solid content 5%.Technique by one and Z42-3/441 centrifuges and greasy filth material pump, electric control panel and
Steelframe constitutes a complete processing system.The centrifuge technique key is adjustable impeller technique, can be according to different water oil
Difference in specific gravity is adjusted, and after three-phase centrifuge, the separation of oil phase is carried out with a minitype vertical type lamination seperator.
Li Zengqiang has carried out oily sediment processing experiment using solid-liquid rotational flow technique, is 43 DEG C in operation temperature, overflow stream
Amount is 12.6m3/ h is pumped under the process conditions for 0.295MPa, and oily average removal rate reaches 98.08%, oil quality score
It can be controlled within 0.45%, the indexs such as COD, volatile phenol, sulfide reach national sewage comprehensive emission standard, can directly arrange
It puts.
(6) biological treatment
Biochemical method oil content be less than 5% oily sludge, have do not form secondary pollution or cause pollutant transfer,
The features such as expense is low.Bioanalysis refers to microorganism and carries out assimilation degradation as carbon source using petroleum hydrocarbon, makes its final permineralization, turns
Become harmless inorganic substances (CO2And H2O process).Degradation of the microorganism to petroleum hydrocarbon, mainly in the catalysis of oxygenase
Under effect, molecular oxygen is attached in matrix, forms oxygen-containing intermediate before this, is then then converted into other substances.Thus, oxygen is
An important factor for influencing growth of aerobic microorganisms and degraded oil hydro carbons.In the presence of petroleum hydrocarbon, microorganism oxygen consumption changes oneself
It is used to characterize substrate degradability, what application was more at present is composting method and bioreactor method.
A. composting method.Composting method is to mix oily waste and material appropriate and placement in heaps, is manually strengthened
It is biodegradable.Composting method can keep the heat generated in microbial metabolism, be conducive to the biodegradation of petroleum hydrocarbon；Water holding
Property, gas permeability be to select the principle of material, commonly use wood sawdust, cutted straw etc..Composting method is common applied to higher hydrocarbon content
Oily sludge and winter longer area.The half-life period of hydro carbons is about 2 weeks in oily sludge, and treated, and oily waste can be straight
Run in and puts or apply farmland.
The method for adding solid mattress agent is taken to increase microbial population in pot book sea etc.；By add soil moved in improve the original, fertilizer, moisture and
Change pH, the nutrition of regulating and controlling microbial and living environment.The experimental results showed that it is at influence to add soil moved in improve the original when processing oily sludge
An important factor for managing effect；Comparatively ideal treatment conditions are：Under the conditions of natural temperature；Soil moved in improve the original dosage 10~20%, fertilizer
5%, mattress agent 5% (weight in wet base) moisture 30% (drying base) 7 and pH7.0.When TPH initial concentrations are 20.6~22.3g/kg, 60
Its removal rate is more than 49%, and the O of windrow after it2Content can reflect the active and total oil of microorganism in biodegradation process
The treatment effect variation tendency of hydrocarbon.
The method that Ou Yangwei etc. is stacked after being sufficiently mixed using greasy filth, microbial inoculum and other additives, under the conditions of three kinds
Bio-augmentation greasy filth is studied.The result shows that under the collective effect of microbial inoculum and sawdust, it is dirty after 45 days
Mud oil content drops to 11% from 24%, and removal rate reaches 54%.And under microbial inoculum independent role, oil content drops to 16%, goes
It is 33% except rate reaches；Under the effect of no microbial inoculum, oil content stills remain in 20% or more.Experiment explanation, biological reinforced decomposition
It is the effective way of disposal of oily sludge.
B. sludge organism reactor method.Bioreactor is that a kind of oily sludge is diluted in nutrient media makes
Slimy container.Bioreactor by artificially controlling the operating conditions such as oxygenation, temperature, nutriment, hydrocarbons
Biodegradation rate is faster compared with other biological processing procedure.The efficient hydrocarbon oxidation bacteria tamed is added in some, accelerates hydro carbons
Biodegradation.According to the literature, when solid loading is 5%, biodegradable half-life period is 5 days.Bioreactor method also may be used
Applied to the pretreatment of petroleum industry waste to reduce hydrocarbon content, make other processing afterwards.
Since U.S.'s GuifCoast oil plants in 1992 build up sludge organism processing demonstration plant, biological treatment device
Oneself is commercialized and extensive use.VALERO oil plant nineteen ninety-fives have built up the sludge organism processing unit that designed capacity is 2kt/a.
Chen Shulin etc. uses greasy filth, the oil-sand of Jiangsu oilfield difference well station oil tank and three phase separator on prefabricated bed
Multistage subsection method banks up treatment technology and carries out biological prosthetic, passes through and water-oil separating inorganic agent, composite bacteria agent, fertilizer and compost is added
Material and H2O2, moisture and pH value are controlled, when greasy filth, crude oil from oil sand total amount are 8.21~388 × 104When mg/kg, by 2
The operation of the moon, for the removal rate of oil total amount up to 66.1~88.2%, wherein alkane removal rate 30%, cycloalkane removal rate is reachable
98%, aromatic hydrocarbon removal rate is up to 86.7%.The bioremediation technology of oily sludge has the following advantages：1. expense is low, about
The 1/4~1/3 of burning disposal expense；2. environment influence is small, biological prosthetic is a natural strengthening process, and final product is titanium dioxide
Carbon, water and aliphatic acid etc., non-secondary pollution or cause pollutant to shift；3. the concentration of pollutant can be reduced to greatest extent.
Most common treatment process is burning method and heat chemistry washing method, wherein burning method advantage in the above technique
It is that treatment effeciency is high, the aqueous oil content of product is low, the disadvantage is that processing procedure has secondary pollution, the exhaust-gas treatment of mating complexity is needed to set
It applies, fixed assets investment is big, high energy consumption, and operating cost is high；Heat chemistry washing method advantage is only to need mating conventional wastewater treatment
Facility, environmental protection treatment relative maturity, low energy consumption, and operating cost is low, the disadvantage is that treatment effeciency is low, the aqueous oil content of product is high, place
Reason place need to do the anti-drain process of antiseepage.
Therefore, how to be researched and developed on the basis of the treatment process of oil field waste oil mud and a set of to be ground the mud that gives up specifically for oil-containing
Treatment process is particularly important, to realize the requirement of the useless mud harmlessness disposing of oil-containing grinding and regeneration.
Invention content
The technical problem to be solved by the present invention is to overcome the technological deficiency of background technology, a kind of useless mud of oil-containing grinding is provided
Treatment process.The present invention meets the requirement of harmless treatment of the useless mud of oil-containing grinding as the hazardous waste with utility value,
Production process pollutant emission is controllable, and the useless mud of the grinding after disposition reaches the standard of comprehensive utilization, realizes resource comprehensive profit
With, turn waste into wealth, reach the maximization of economic benefit, social benefit.
Technological means is used by the present invention solves above-mentioned technical problem：
Oil-containing is ground the mud that gives up and is handled successively by following process by a kind of useless sludge treatment technology of oil-containing grinding：(1) it screens；
(2) centrifuge takes off liquid；(3) alkali cleaning；(4) press filtration is cleaned.
Preferably, the raw material oil-containing abrasive dust of the present invention mud that gives up requires to store up three days or more in place so that moisture content in useless mud,
Oil content obtains nature and drains, Ye state Cheng Fen≤25%.The sundries such as grinding wheel, iron block, rag, gloves cannot be entrained in useless mud, with
Exempt to influence the operation of centrifuge.The liquid parts are grinding oil.
It is highly preferred that the oil-containing grinding is given up, mud contains 25% liquid parts and 75% solid state component.
Most preferably, the oil-containing grinding gives up mud containing 25% liquid parts and 75% solid state component, the solid state component packet
Include 68% Fe, 6.7% other metallic elements and 0.3% other nonmetalloids.
Preferably, in the screening process, some bulks of the inside are mingled in during grinding is generated by screening machine
Impurity removes, to protect subsequent production equipment, sieving Li Du≤2mm.On the one hand the effect of screening is some in raw material
The material of caking is on the other hand not so some of which impurity can be damaged subsequent filter plant to getting rid of to being crushed.
Preferably, the centrifuge takes off in liquid process, and the equipment used is vertical centrifugal machine；The useless mud of oil-containing grinding enters vertical
Formula centrifuge, only one separation of solid and liquid process, the requirement without any technological parameter.
It is highly preferred that the vertical centrifugal machine revolution is 300r/min.
Most preferably, the centrifuge takes off in liquid process, and the useless mud Han Shui Shuai of oil-containing grinding after the de- liquid of the centrifuge≤
10%, Han You Shuai≤5%.
Preferably, in the caustic wash process, the equipment used is screw sand washer.
It is highly preferred that in the caustic wash process, since alkali is removal medium most economical in industrial practice, spiral
Sand washer removes grease by using the method for alkali cleaning.The alkali cleaning parameter：50~65 DEG C of water temperature, washing solid-to-liquid ratio 12~
20%, concentration of lye 3~5%.The lye is sodium carbonate liquor.
Most preferably, in the caustic wash process, useless mud Han You Shuai≤1% of oil-containing grinding after the alkali cleaning.
Preferably, in the cleaning press filtration process, the equipment used realizes that cleaning press filtration is integrally made for Multifunction filtering machine
Industry, by test result, cleaning press filtration repeats not less than three cycles.
It is highly preferred that in the cleaning press filtration process, the equipment used is knob gram Multifunction filtering machine；The Niu Keduo work(
It can filter cleaning parameters：Water temperature is not less than not less than 15 DEG C, washing solid-to-liquid ratio 10~15%, filter supply gas pressure
1.2MPa, washing times are not less than three times.Knob gram Multifunction filtering machine is that the material after alkali cleaning is cleaned, effect as
The rinsing carried out after washing clothes with detergent.
Most preferably, in the cleaning press filtration process, useless mud Han Shui Shuai≤22% of oil-containing grinding after the cleaning press filtration,
Han You Shuai≤0.5%.
The present invention, which covers, builds sewage treatment facility, the sewage categorised collection generated in place sewage and production process, respectively
Processing, and realize cycling utilization of wastewater, realize wastewater zero discharge.Wherein：
(1) unified collect to salvage sump of waste oil that first order centrifuge is separated is stored, and qualification has periodically been delivered
Unit disposition；
(2) second level alkali wash water lye waste liquid is concentrated to the first cesspool, reuse after processing；
(3) third level clear water washes is concentrated to the second cesspool, after processing reuse.
In addition, the present invention also provides a kind of oil-containings to be ground mud processing equipment of giving up, the processing equipment includes sequentially connecting successively
Revolving drum type screening machine, vertical centrifugal machine, screw sand washer and the Niu Ke multi-function washing machines connect.
Further in technical solution, the revolving drum type screening machine is provided with revolving drum type screening machine feed inlet and drum-type sieve
Select machine discharge port, the vertical centrifugal machine inlet that the revolving drum type screening machine discharge port passes through the first conveyer belt and vertical centrifugal machine
It is connected；The vertical centrifugal machine is provided with vertical centrifugal machine liquid outlet and vertical centrifugal machine discharge port；The vertical centrifugal machine goes out
Liquid mouth is connected with salvage sump, the spiral washed-out sand that the vertical centrifugal machine discharge port passes through the second conveyer belt and screw sand washer
Machine inlet is connected, and the screw sand washer feed inlet is connected with potass pool, and the lye in the potass pool is by water pump by alkali
Liquid pump enters the screw sand washer feed inlet；The screw sand washer is provided with screw sand washer liquid outlet and screw sand washer goes out
Material mouth；The screw sand washer liquid outlet is connected with the first cesspool, and the screw sand washer discharge port passes through third conveyer belt
It is connected with the knob gram Multifunction washing machine inlet of knob gram multi-function washing machine；The knob gram multi-function washing machine is provided with Niu Ke
Multi-function washing machine air inlet, knob gram multi-function washing machine inlet, knob gram multi-function washing machine liquid outlet and Niu Ke are multi-functional
Cleaning machine discharge port；The knob gram multi-function washing machine air inlet is connected with air compressor, the knob gram multi-function washing machine
Inlet is connected with clear water reserviors, and the knob gram multi-function washing machine liquid outlet is connected with the second cesspool, the Niu Keduo
Function cleaning machine discharge port is connected with the 4th conveyer belt.
Further in technical solution, the revolving drum type screening machine front end is connected with loading machine.
In further technical solution, the loading machine, which is provided with, loads machine inlet and loading machine discharge port, the dress
Carrier aircraft discharge port is connected by the 5th conveyer belt with the revolving drum type screening machine feed inlet.
In above-mentioned technical proposal, the percentage (%) refers both to mass percent.
The basic principle of the present invention：
Oil-containing grinding gives up mud due to containing waste mineral oil, is named as hazardous waste.There is strictly hazardous waste in country
Management and control.And the iron-holder of the useless mud of oil-containing grinding is high (being more than 70%), is the resource of preciousness.So the purpose of this technique is handle
Waste mineral oil separation removal in the useless mud of oil-containing grinding so that grinding gives up mud as the iron powder that can be comprehensively utilized.As ironmaking
Raw material, iron-holder are far below Iron Ore Powder far above iron ore, impurity content.
Oil-containing grinding of the present invention gives up mud by vertical centrifugal machine separation of solid and liquid, and alkali liquid washing is carried out into spiral sand washer,
Clear water washing and filtering three times are carried out subsequently into knob gram Multifunction filtering machine, ultimately forms product.
The present invention is by selecting suitable equipment, and by continuous adjusting process parameter, finally obtain it is a kind of meet it is harmless
Change the useless sludge treatment technology of oil-containing grinding of processing requirement.
Compared with prior art, technical scheme of the present invention has the following advantages that：
The present invention meets the requirement of harmless treatment of the useless mud of oil-containing grinding as the hazardous waste with utility value, raw
Produce that process contaminant discharge is controllable, the mud that gives up of the grinding after disposition reaches the standard of comprehensive utilization, realize comprehensive utilization of resources,
Turn waste into wealth, reaches the maximization of economic benefit, social benefit, wherein：
(1) treatment process environmental protection of the present invention：Realize that harmless treatment, processing procedure are environmentally friendly；
(2) treatment process economy of the present invention：The economy (investment in fixed assets is within the scope of rational) of investment, production
The economy of operation (conversion that processing cost should be less than equal volume iron ore concentrate is worth)；
(3) treatment process of the present invention is safe and energy saving：Production equipment and process meet relevant safety regulations, and system realizes section
It can operation；
(4) component and its content of the invention that liquid and solid state component in giving up mud are ground to raw material is without particular/special requirement, together
Detergent special Shi Wuxu, process equipment is without individually designed, process operations simplicity, convenient for industrialized production；
(5) You fat Han Liang≤0.5% of finished product of the present invention, is up to state standards《Scrap iron and steel》In for impurity content
It is required that.
Description of the drawings
Fig. 1 is the structural schematic diagram of the useless mud processing equipment of 5 oil-containing of embodiment of the present invention grinding；
Fig. 2 is the structural schematic diagram of the useless mud processing equipment of 6 oil-containing of embodiment of the present invention grinding；
The corresponding component names of each reference numeral are in figure：1- revolving drum type screening machines, 2- vertical centrifugal machines, 3- spirals
Sand washer, 4- knob gram multi-function washing machines, 5- loading machines.
Specific implementation mode
In order to better understand the content of the present invention, it is described further with reference to specific embodiments and the drawings.Ying Li
Solution, these embodiments are only used for that the present invention is further described, rather than limit the scope of the invention.In addition, it should also be understood that,
After having read present disclosure, person skilled in art makes some nonessential changes or adjustment to the present invention, still belongs to
In protection scope of the present invention.
The grinding of 1~4 raw materials used oil-containing of the embodiment of the present invention gives up mud from Duo Jia bearing machinings enterprise of Ningbo City, wherein grinding
Cut liquid parts grinding oil content≤25% in useless mud.
The useless mud of oil-containing abrasive dust described in the embodiment of the present invention 1~4 contains 25% liquid parts and 75% solid state component, described solid
State ingredient includes 68% Fe, 6.7% other metallic elements and 0.3% other nonmetalloids.
1~4 equipment of the embodiment of the present invention includes：
(1) revolving drum type screening machine：Ningbo Lian Qing environmental protection equipments Co., Ltd, model：LQGTS-1500/3000, for sieving
Select process；
(2) vertical centrifugal machine：Zhangjiagang City Huaxiang Centrifugal Manufacturing Co., Ltd., model：PSD1250 is used for centrifuge
De- liquid process.
(3) spiral sand washing machine：Ningbo Lian Qing environmental protection equipments Co., Ltd, model：LQXS-6000/1500 is used for alkali cleaning
Process.
(4) knob gram Multifunction filtering machine：Hundred Yu Yaohua device fabrications Co., Ltd of Wuxi, model：GXG2800, for clear
Wash press filtration process.
Embodiment 1
Oil-containing is ground the mud that gives up and is handled successively by following process by a kind of useless sludge treatment technology of oil-containing grinding：
(1) it screens：Revolving drum type screening machine is added with forklift in raw material oil-containing grinding mud to screen, sieving Li Du≤2mm；
(2) centrifuge takes off liquid：Material after sieving enters vertical centrifugal machine and carries out de- liquid, is separated by solid-liquid separation, centrifuge revolution
300r/min, wherein the waste oil separation storage isolated；
(3) alkali cleaning：Solid material after centrifuge takes off liquid enters screw sand washer, under the action of lye sodium carbonate into
Row alkali cleaning, wherein 50 DEG C of water temperature, solid-to-liquid ratio 12%, concentration of lye 3%, the outer dispatch Sewage Disposal of spent lye；
(4) press filtration is cleaned：The useless mud of oil-containing grinding after alkali cleaning enters knob gram multi-function washing machine, wherein air pressure 7Mpa,
Rotating speed 350r/min, washing times 3 times finally obtain iron powder product, the wherein outer dispatch sewage plant processing of waste water.
The present embodiment experiment lasts 8h, and coprocessing oil-containing is ground mud 10t, waste oil centralized collection in processing procedure, properly
Storage；Waste water is concentrated to wastewater collection pond and keeps in, and has carried out the anti-overflow measure of antiseepage.
It is 21% through above-mentioned operation treated finished product iron powder moisture content, oil content 0.5%.
Embodiment 2
From embodiment 1 difference lies in caustic wash process parameter is different, wherein 58 DEG C of water temperature, solid-to-liquid ratio 16%, concentration of lye
4%.
It is 22% through above-mentioned operation treated finished product iron powder moisture content, oil content 0.5%.
Embodiment 3
From embodiment 1 difference lies in caustic wash process parameter is different, wherein 65 DEG C of water temperature, solid-to-liquid ratio 20%, concentration of lye
5%.
It is 22% through above-mentioned operation treated finished product iron powder moisture content, oil content 0.45%.
Embodiment 4
From embodiment 1 difference lies in caustic wash process parameter is different, wherein 65 DEG C of water temperature, solid-to-liquid ratio 12%, concentration of lye
5%.
It is 22% through above-mentioned operation treated finished product iron powder moisture content, oil content 0.35%.
1 Examples 1 to 4 technological parameter of table is arranged and product index
Examples 1 to 4 specific process parameter is arranged and product index is shown in Table 1.Wherein, the rotating speed of centrifuge, Niu Keduo work(
The pressure and rotating speed of energy filter are uncontrollable, and in theory, rotating speed is higher, pressure is higher, and effect is better.
From the point of view of test result, water temperature is improved, solid-to-liquid ratio is reduced, improves concentration of lye, the removal rate for grease is that have
Benefit.
Embodiment 5
A kind of grinding of oil-containing is given up mud processing equipment, the processing equipment include the revolving drum type screening machine 1 being linked in sequence successively,
Vertical centrifugal machine 2, screw sand washer 3 and Niu Ke multi-function washing machines 4 (referring to Fig.1)；The revolving drum type screening machine 1 is provided with rolling
Cartridge type screens machine inlet and revolving drum type screening machine discharge port, and the revolving drum type screening machine discharge port is by the first conveyer belt and stands
The vertical centrifugal machine inlet of formula centrifuge 2 is connected；The vertical centrifugal machine 2 be provided with vertical centrifugal machine liquid outlet and it is vertical from
Scheming discharge port；The vertical centrifugal machine liquid outlet is connected with salvage sump, and the vertical centrifugal machine discharge port passes through second
Conveyer belt is connected with the screw sand washer feed inlet of screw sand washer 3, and 3 feed inlet of the screw sand washer is connected with potass pool
Lye is pumped into the screw sand washer feed inlet by (not shown), the lye in the potass pool by water pump；The screwed washing
Sand machine 3 is provided with screw sand washer liquid outlet and screw sand washer discharge port；The screw sand washer liquid outlet and the first sewage
Pond is connected (not shown), the Niu Keduo that the screw sand washer discharge port passes through third conveyer belt and knob gram multi-function washing machine 4
Function cleans machine inlet and is connected；The knob gram multi-function washing machine 4 is provided with knob gram multi-function washing machine air inlet, Niu Keduo
Function cleaning machine inlet, knob gram multi-function washing machine liquid outlet and Niu Ke multi-function washing machine discharge ports；The Niu Keduo work(
Energy cleaning machine air inlet is connected with air compressor, and the knob gram multi-function washing machine inlet is connected with clear water reserviors, the institute
It states knob gram multi-function washing machine liquid outlet with the second cesspool to be connected (not shown), the knob gram multi-function washing machine discharge port connects
It is connected to the 4th conveyer belt.
The operation logic of the processing equipment：Raw material oil-containing is ground to the mud addition rolling screening 1 that gives up to screen,
Middle sieving Li Jing≤2mm.Material after sieving enters vertical centrifugal machine 2 and carries out de- liquid, is separated by solid-liquid separation, wherein the waste oil isolated
Separation storage.Solid material after centrifuge takes off liquid enters screw sand washer 3, and alkali cleaning is carried out under lye effect, wherein useless
The outer dispatch Sewage Disposal of lye.The useless mud of oil-containing grinding after 3 alkali cleaning of screw sand washer enters knob gram multi-function washing machine 4,
Cleaning press filtration is carried out under the conditions of certain air pressure and recirculated water, washing times finally obtain iron powder product not less than three times, wherein
The outer dispatch sewage plant processing of waste water.
Embodiment 6
A kind of useless mud processing equipment of oil-containing grinding, difference lies in 1 front ends of the revolving drum type screening machine to connect with embodiment 5
There is loading machine 5 (with reference to Fig. 2)；The loading machine 5, which is provided with, loads machine inlet and loading machine discharge port, the loading machine discharging
Mouth is connected by the 5th conveyer belt with the revolving drum type screening machine feed inlet.
The operation logic of the processing equipment：Raw material oil-containing is ground to the mud that gives up, loading machine 5 is added, entered roller later and sieve
Machine 1 is selected to screen raw material, wherein sieving Li Jing≤2mm.Material after sieving enters vertical centrifugal machine 2 and carries out de- liquid, Gu
Liquid detaches, wherein the waste oil separation storage isolated.Solid material after centrifuge takes off liquid enters screw sand washer 3, in alkali
Liquid effect is lower to carry out alkali cleaning, the wherein outer dispatch Sewage Disposal of spent lye.The useless mud of oil-containing grinding after 3 alkali cleaning of screw sand washer
Into knob gram multi-function washing machine 4, cleaning press filtration is carried out under the conditions of certain air pressure and recirculated water, washing times are not less than three
It is secondary, finally obtain iron powder product, the wherein outer dispatch sewage plant processing of waste water.
Effect example
You fat Han Liang≤0.5% of finished product iron powder of the present invention, is up to state standards《Scrap iron and steel》In for impurity content
Requirement.
Present invention experiment directly carries out in the production line, according to experiment as a result, under above-mentioned process conditions, can reach
The requirement of standard.
1~6 treatment process of the embodiment of the present invention and processing equipment can meet the useless mud harmlessness disposing of oil-containing grinding
Requirement, production process pollutant emission is controllable, and the mud that gives up of the grinding after disposition reaches the standard of comprehensive utilization, realizes danger
The regeneration of waste, it was demonstrated that treatment process and processing equipment of the present invention meet the requirement of the useless mud harmlessness disposing of grinding.
Above description is not the limitation to invention, and the present invention is also not limited to the example above.The common skill of the art
In the essential scope of invention, the variations, modifications, additions or substitutions made should also belong to the scope of protection of the present invention art personnel.
Claims (10)
- The sludge treatment technology 1. a kind of oil-containing grinding is given up, which is characterized in that oil-containing is ground to the mud that gives up and is handled successively by following process： (1) it screens；(2) centrifuge takes off liquid；(3) alkali cleaning；(4) press filtration is cleaned.
- The sludge treatment technology 2. a kind of oil-containing grinding as described in claim 1 is given up, which is characterized in that the oil-containing grinding give up mud at Divide liquid parts≤25%.
- The sludge treatment technology 3. a kind of oil-containing grinding as described in claim 1 is given up, which is characterized in that the useless mud of oil-containing grinding contains 25% liquid parts and 75% solid state component, the solid state component include 68% Fe, 6.7% other metallic elements and 0.3% other nonmetalloids.
- The sludge treatment technology 4. a kind of oil-containing grinding as described in claim 1 is given up, which is characterized in that in the process (1), sieving Granularity≤2mm.
- The sludge treatment technology 5. a kind of oil-containing grinding as described in claim 1 is given up, which is characterized in that in the process (2), use Equipment be vertical centrifugal machine；The vertical centrifugal machine revolution is 300r/min；Oil-containing grinding after the de- liquid of the centrifuge is useless Mud moisture content≤10%, oil content≤5%.
- The sludge treatment technology 6. a kind of oil-containing grinding as described in claim 1 is given up, which is characterized in that in the process (3), use Equipment be screw sand washer；The alkali cleaning parameter：50~65 DEG C of water temperature, washing solid-to-liquid ratio 12~20%, concentration of lye 3~ 5%；Useless mud oil content≤1% of oil-containing grinding after the alkali cleaning.
- The sludge treatment technology 7. a kind of oil-containing grinding as described in claim 1 is given up, which is characterized in that in the process (4), use Equipment be knob gram Multifunction filtering machine；The knob gram Multifunction filtering machine cleaning parameters：Water temperature is not less than 15 DEG C, washing solid-liquid Than 10~15%, filter supply gas pressure not less than 1.2MPa, washing times not less than three times；Oil-containing after the cleaning press filtration Useless mud moisture content≤22% of grinding, oil content≤0.5%.
- The mud processing equipment 8. a kind of oil-containing grinding is given up, which is characterized in that the processing equipment includes the roller being linked in sequence successively Formula screening machine (1), vertical centrifugal machine (2), screw sand washer (3) and knob gram multi-function washing machine (4).
- The mud processing equipment 9. a kind of oil-containing grinding as claimed in claim 8 is given up, which is characterized in that the revolving drum type screening machine (1) it is provided with revolving drum type screening machine feed inlet and revolving drum type screening machine discharge port, the revolving drum type screening machine discharge port passes through One conveyer belt is connected with the vertical centrifugal machine inlet of vertical centrifugal machine (2)；The vertical centrifugal machine (2) is provided with vertical centrifugal Machine liquid outlet and vertical centrifugal machine discharge port；The vertical centrifugal machine liquid outlet is connected with salvage sump, the vertical centrifugal Machine discharge port is connected by the second conveyer belt with the screw sand washer feed inlet of screw sand washer (3), the screw sand washer (3) Feed inlet is connected with potass pool, and lye is pumped into the screw sand washer feed inlet by the lye in the potass pool by water pump； The screw sand washer (3) is provided with screw sand washer liquid outlet and screw sand washer discharge port；The screw sand washer goes out liquid Mouth is connected with the first cesspool, and the screw sand washer discharge port passes through third conveyer belt and knob gram multi-function washing machine (4) Knob gram Multifunction washing machine inlet is connected；The knob gram multi-function washing machine (4) is provided with knob gram multi-function washing machine air inlet Mouth, knob gram multi-function washing machine inlet, knob gram multi-function washing machine liquid outlet and Niu Ke multi-function washing machine discharge ports；It is described Knob gram multi-function washing machine air inlet is connected with air compressor, the knob gram multi-function washing machine inlet and clear water reserviors phase Even, the knob gram multi-function washing machine liquid outlet is connected with the second cesspool, the knob gram multi-function washing machine discharge port It is connected with the 4th conveyer belt.
- 10. a kind of useless mud processing equipment of oil-containing grinding as claimed in claim 8 or 9, which is characterized in that the drum-type screening Machine (1) front end is connected with loading machine (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810366061.8A CN108383353A (en) | 2018-04-23 | 2018-04-23 | A kind of useless sludge treatment technology of oil-containing grinding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810366061.8A CN108383353A (en) | 2018-04-23 | 2018-04-23 | A kind of useless sludge treatment technology of oil-containing grinding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108383353A true CN108383353A (en) | 2018-08-10 |
Family
ID=63064915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810366061.8A Pending CN108383353A (en) | 2018-04-23 | 2018-04-23 | A kind of useless sludge treatment technology of oil-containing grinding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108383353A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277638A (en) * | 2021-01-25 | 2021-08-20 | 山东中能环保科技股份有限公司 | Stainless steel pickling wastewater sludge treatment method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202284175U (en) * | 2011-10-21 | 2012-06-27 | 中国石油化工股份有限公司 | Oily sludge treatment device |
| TW201408602A (en) * | 2012-08-16 | 2014-03-01 | Ya-Min Hsieh | Full resource recycling treatment technique for waste cutting oil |
| CN103739175A (en) * | 2013-12-17 | 2014-04-23 | 辽宁石油化工大学 | Method for processing oil sludge |
| CN104341081A (en) * | 2013-07-30 | 2015-02-11 | 麦王环境技术股份有限公司 | Harmless treatment method for separation and recovery of oily sludge |
| CN105386075A (en) * | 2015-11-30 | 2016-03-09 | 马鞍山泓宇材料科技有限公司 | Treatment method for grinding cutting oil sludge |
| CN205436600U (en) * | 2016-03-29 | 2016-08-10 | 中国电建集团中南勘测设计研究院有限公司 | Heavy metal contaminated soil's chemical drip washing repair equipment |
| CN205528329U (en) * | 2016-02-16 | 2016-08-31 | 南京英辰通工程技术有限公司 | Grinding ash piece -rate system of deoiling |
| CN106517712A (en) * | 2016-12-30 | 2017-03-22 | 深圳德尔科机电环保科技有限公司 | Oil-containing grinding sludge resourceful treatment device and method |
-
2018
- 2018-04-23 CN CN201810366061.8A patent/CN108383353A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202284175U (en) * | 2011-10-21 | 2012-06-27 | 中国石油化工股份有限公司 | Oily sludge treatment device |
| TW201408602A (en) * | 2012-08-16 | 2014-03-01 | Ya-Min Hsieh | Full resource recycling treatment technique for waste cutting oil |
| CN104341081A (en) * | 2013-07-30 | 2015-02-11 | 麦王环境技术股份有限公司 | Harmless treatment method for separation and recovery of oily sludge |
| CN103739175A (en) * | 2013-12-17 | 2014-04-23 | 辽宁石油化工大学 | Method for processing oil sludge |
| CN105386075A (en) * | 2015-11-30 | 2016-03-09 | 马鞍山泓宇材料科技有限公司 | Treatment method for grinding cutting oil sludge |
| CN205528329U (en) * | 2016-02-16 | 2016-08-31 | 南京英辰通工程技术有限公司 | Grinding ash piece -rate system of deoiling |
| CN205436600U (en) * | 2016-03-29 | 2016-08-10 | 中国电建集团中南勘测设计研究院有限公司 | Heavy metal contaminated soil's chemical drip washing repair equipment |
| CN106517712A (en) * | 2016-12-30 | 2017-03-22 | 深圳德尔科机电环保科技有限公司 | Oil-containing grinding sludge resourceful treatment device and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277638A (en) * | 2021-01-25 | 2021-08-20 | 山东中能环保科技股份有限公司 | Stainless steel pickling wastewater sludge treatment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101786776B (en) | Advanced treatment process of sludge containing oil | |
| CN106810030B (en) | Safe treatment method of oil sludge | |
| CN102241998B (en) | Treatment equipment and process of oily sludge and sand | |
| CN103693833B (en) | A kind of comprehensive processing method of oily sludge | |
| CN103121774A (en) | Multi-stage recycling device and method for waste water in semi-coke production | |
| CN108821528A (en) | A kind of micro-organism treatment process and processing system of Oilfield Oil-Contained Silt | |
| CN101397517A (en) | Method for producing oil-containing sludge fuel | |
| WO2021129819A1 (en) | Kitchen waste recycling method and treatment system | |
| CN103539325A (en) | Processing method and system for sludge containing oil | |
| CN203144236U (en) | Multi-stage recovering device for recycling semi-coke industrial wastewater | |
| CN201495155U (en) | Oil-contained sludge treatment device | |
| CN109264946A (en) | A kind of method of step depth separation oily sludge | |
| CN105967496B (en) | A kind of method for innocent treatment of sludge with high salt | |
| CN108383353A (en) | A kind of useless sludge treatment technology of oil-containing grinding | |
| CN108328896A (en) | The useless sludge treatment technology of one kind grinding containing emulsion | |
| CN211056924U (en) | Innocent treatment system of oily sludge | |
| CN204892545U (en) | Papermaking discarded object resources recovery and recycle processing system | |
| CN211226875U (en) | Oily sludge hot washing treatment system | |
| CN110252781A (en) | Rubbish three phase separation treatment process | |
| CN201825828U (en) | Oily sediment treatment device | |
| CN111774415B (en) | Cooperative treatment method and treatment system based on sewage sludge, garbage and manure | |
| CN109437498B (en) | Method and device for treating low-concentration oily sludge in refinery sewage field | |
| CN211839515U (en) | Kitchen waste resourceful treatment system | |
| CN210434034U (en) | Novel comprehensive utilization device for oil-containing pollutants | |
| CN106946425B (en) | A kind of modularization skid-mounted type system and method for low-temperature ion method processing oily sludge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 315318 Taoyuan 22, Wuyuqiao Village, Henghe Town, Cixi City, Ningbo City, Zhejiang Province Applicant after: Zhejiang Lianqing Environmental Protection Technology Co., Ltd. Address before: 315318 Taoyuan 22, Wuyuqiao Village, Henghe Town, Cixi City, Ningbo City, Zhejiang Province Applicant before: Ningbo Lian Qing environmental protection equipment Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No.2 Mingsu Road, Shanglinhu village, Qiaotou town, Cixi City, Ningbo City, Zhejiang Province Applicant after: Zhejiang Lianqing Environmental Protection Technology Co.,Ltd. Address before: 315318 Taoyuan 22, Wu Yu Qiao village, Henghe Town, Cixi, Ningbo, Zhejiang Applicant before: Zhejiang Lianqing Environmental Protection Technology Co.,Ltd. |