CN108613200B - Pretreatment system and pretreatment method for oil-containing waste liquid of steel rolling system before incineration disposal - Google Patents
Pretreatment system and pretreatment method for oil-containing waste liquid of steel rolling system before incineration disposal Download PDFInfo
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- CN108613200B CN108613200B CN201810693620.6A CN201810693620A CN108613200B CN 108613200 B CN108613200 B CN 108613200B CN 201810693620 A CN201810693620 A CN 201810693620A CN 108613200 B CN108613200 B CN 108613200B
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- 239000002699 waste material Substances 0.000 title claims abstract description 93
- 239000007788 liquid Substances 0.000 title claims abstract description 87
- 238000005096 rolling process Methods 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 238000002203 pretreatment Methods 0.000 title claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 91
- 238000004140 cleaning Methods 0.000 claims abstract description 86
- 238000003860 storage Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 32
- 239000012535 impurity Substances 0.000 claims description 20
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 11
- 239000010419 fine particle Substances 0.000 claims description 10
- 239000010865 sewage Substances 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 30
- 239000000839 emulsion Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000000126 substance Substances 0.000 description 8
- 238000005086 pumping Methods 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 5
- 239000003995 emulsifying agent Substances 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000010731 rolling oil Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/60—Separating
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a pretreatment system before incineration disposal of oil-containing waste liquid of a steel rolling system, which comprises the following components: the device comprises a receiving and filtering unit, a storage tank, a conveying and filtering unit and a burning unit which are connected in sequence; the reception filter unit includes: the device comprises a first-stage magnetic filter, a first-stage automatic cleaning and filtering device and a second-stage automatic cleaning and filtering device which are sequentially connected, wherein the second-stage automatic cleaning and filtering device is connected with a storage tank; the transport filter unit includes: the secondary magnetic filter is connected with the storage tank, and the tertiary automatic cleaning and filtering device is connected with the spraying and burning unit; further comprises: and (5) pollution discharge and matching with an incineration unit. The invention also discloses a pretreatment method before incineration disposal of the oil-containing waste liquid of the steel rolling system. The invention has simple process and high automation degree, can effectively pretreat the oil-containing waste liquid of the steel rolling system in the steel industry, and provides favorable conditions for incineration disposal.
Description
Technical Field
The invention relates to treatment of oily waste liquid in the steel rolling industry, in particular to a pretreatment system and a pretreatment method before incineration disposal of the oily waste liquid in a steel rolling system.
Background
The rolling is a pressure processing technology for rolling metal blanks into plates with various specifications by using rollers. Emulsions are commonly used in steel rolling processes to cool and lubricate the rolled stock. The rolling emulsion is required to have good cooling and lubricating performance, chemical stability and rust resistance, and is based on mineral oil and various additives are added to form a mineral oil-water mixed solution with stable chemical properties, wherein the mineral oil-water mixed solution contains a rust inhibitor, an emulsifying agent, a defoaming agent, an antioxidant and the like. The rolling emulsion is subjected to high temperature and oxidation in the use process, and the immersed metal powder and moisture can gradually age and deteriorate the oil product, so that the rolling emulsion must be replaced after a certain period of use. The waste emulsion has complex chemical components, high water and impurity content, serious emulsification degree and stable chemical property, and brings great difficulty to subsequent treatment and reutilization.
Specifically, the oil-containing waste liquid generated in the steel rolling process is mainly waste emulsion (or called waste cold rolling oil), and is generally generated by ultrafiltration and the like of a steel rolling oil-containing waste water treatment system, and has the following characteristics:
1) The water content is high: the water content of the waste emulsion is 20% -70%, and the water content of other types of waste lubricating oil is not more than 5%;
2) The content of the emulsifying agent is high: the cold-rolled oil must have proper emulsion stability, so that the content of the emulsifier is 10% -15%. The high content of the emulsifying agent brings great difficulty to the dehydration of the waste liquid;
3) High oil sludge and gum content: because the cold rolling oil has harsh working conditions, the oil is repeatedly heated and cooled, so that the oil is easy to oxidize. Meanwhile, the high water content of the emulsion further promotes oxidation and is easy to be affected by microorganisms, so that deterioration products in the waste emulsion are particularly large.
In the prior patent, as the application number 201610408065.9, an automatic emulsion treatment system and a treatment process thereof are disclosed, wherein the automatic emulsion treatment system comprises an emulsion oil tank, a circulating tank, a membrane filter and a filtrate tank which are sequentially connected in series; a filtrate return pipe is arranged between the filtrate tank and the circulating tank, a cleaning water drain pipe is arranged between the circulating tank and the emulsifying oil tank, and a concentrated solution return pipe is arranged between the membrane filter and the circulating tank; the device also comprises a concentrated solution tank, a concentrated solution pipe is arranged between the circulating tank and the concentrated solution tank, and the circulating tank is connected with a cleaning water pipe for conveying tap water; the device also comprises a liquid medicine tank, wherein a medicine adding pipe is arranged between the liquid medicine tank and the circulating tank; the device also comprises a delivery pump and a control device. Because the patent relates to a membrane filter and tap water as cleaning water, the relative cost is high, a certain amount of production wastewater can be generated, and the serial connection of an emulsifying oil tank, a circulating tank, the membrane filter and a filtrate tank also brings the defect of more complicated actual production, which is unfavorable for engineering application.
As another example, chinese patent No. ZL201310211366.9 discloses a regenerating apparatus and method for waste emulsion produced in a rolling process, the apparatus comprising: a charging unit; a heating unit; the filtering and impurity removing unit comprises a primary filter, a secondary filter and a magnetic filter which are sequentially connected; a heat-chemical treatment unit performing heat-chemical treatment on the heated and filtered waste emulsion, including a first mixer, a first heat sedimentation tank, a second mixer, and a second heat sedimentation tank, the first mixer being connected to the filtering and impurity removal unit, the demulsifier supply device, and the first heat sedimentation tank, the second mixer being connected to the flocculant supply device, the first heat sedimentation tank, and the second sedimentation tank; and a product refining unit. The process is complex, needs heat-chemical treatment, needs to add demulsifier and flocculant, has high cost, does not consider damage of iron-containing fine particles in emulsion to the filter, and shortens the continuous service cycle of the filter greatly after the magnetic filter is placed in the primary filter and the secondary filter, thereby being unfavorable for engineering application.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a pretreatment system and a pretreatment method before incineration disposal of the oil-containing waste liquid of the steel rolling system, which have simple process and high degree of automation, can effectively pretreat the oil-containing waste liquid of the steel rolling system in the steel industry, and provide favorable conditions for the incineration disposal.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in one aspect, a pretreatment system for incineration disposal of oily waste liquid of a steel rolling system comprises: the device comprises a receiving and filtering unit, a storage tank, a conveying and filtering unit and a burning unit which are connected in sequence;
the reception filter unit includes: the device comprises a first-stage magnetic filter, a first-stage automatic cleaning and filtering device and a second-stage automatic cleaning and filtering device which are sequentially connected, wherein the second-stage automatic cleaning and filtering device is connected with a storage tank;
the transport filter unit includes: the secondary magnetic filter is connected with the storage tank, and the tertiary automatic cleaning and filtering device is connected with the spraying and burning unit;
further comprises: and (5) pollution discharge and matching with an incineration unit.
The blowdown incineration unit comprises: the sewage tank is connected with the primary automatic cleaning and filtering device, the secondary automatic cleaning and filtering device and the tertiary automatic cleaning and filtering device in sequence.
The filter screen of the first-stage automatic cleaning filter device is 20-40 meshes.
The filter screen of the secondary automatic cleaning and filtering device is 40-80 mesh.
The filtering net of the three-stage automatic cleaning and filtering device is 80-100 meshes.
The spraying and burning unit comprises: the valve group, the waste liquid atomizing medium with a certain pressure (0.4-0.8 MPa), the waste liquid spray gun arranged in the incinerator, the incinerator and the waste heat boiler.
A plurality of spray guns (1 or more of which are waste liquid spray guns) are arranged in the incinerator.
On the other hand, the pretreatment method for the oil-containing waste liquid of the steel rolling system before incineration disposal comprises the following processes:
1) The oil-containing waste liquid generated in the steel rolling process flows into a primary magnetic filter through a pump set, and iron-containing fine particles in the oil-containing waste liquid are adsorbed by the primary magnetic filter;
2) The oily waste liquid treated by the step 1) flows into a first-stage automatic cleaning and filtering device and a second-stage automatic cleaning and filtering device in sequence, and then flows into a storage tank;
3) The oily waste liquid in the storage tank flows into a secondary magnetic filter through a pump set, and iron-containing fine particles in the oily waste liquid are further adsorbed by the secondary magnetic filter;
4) The oily waste liquid treated by the step 3) flows into a three-stage automatic cleaning and filtering device for filtering;
5) Finally, the oily waste liquid is subjected to atomization incineration treatment in the incinerator through the spraying and burning unit.
Further comprises: step 5), the impurities and the waste liquid generated after the self-cleaning of the first-stage automatic cleaning and filtering device, the second-stage automatic cleaning and filtering device and the third-stage automatic cleaning and filtering device flow to a pollution discharge tank to be collected, and finally the waste liquid is pumped into a compatibility system and is conveyed into an incinerator for incineration disposal after compatibility treatment.
The storage tank, the pollution discharge tank and the waste liquid conveying pipeline are insulated by utilizing steam generated by the waste heat boiler.
In the technical scheme, the pretreatment system and the pretreatment method for the oil-containing waste liquid of the steel rolling system before incineration disposal have the following beneficial effects:
1) According to the invention, the storage tank, the pollution discharge tank and the waste liquid conveying pipeline fully utilize the waste heat boiler steam of the incineration system as a heat-tracing heat-preserving medium, so that the flowing conveying of waste liquid can be ensured, and the energy conservation and the environmental protection are realized;
2) The pretreatment system of the invention adopts a physical method to pretreat the oily waste liquid, does not involve heat-chemical treatment, has simple process and high degree of automation, and is beneficial to engineering application;
3) The pretreatment system fully considers the characteristic that the oil-containing waste liquid of the steel rolling system in the steel industry contains a certain amount of iron particles, and in the receiving and filtering unit, the primary magnetic filter is arranged in front of the primary automatic cleaning and filtering device and the secondary automatic cleaning and filtering device, and in the conveying and filtering unit, the secondary magnetic filter is arranged in front of the tertiary automatic cleaning and filtering device, so that the use condition of automatic cleaning and filtering is effectively improved, and the continuous use period of automatic cleaning and filtering is prolonged;
4) According to the invention, the first-stage to third-stage automatic cleaning and filtering device does not need to adopt an external medium for auxiliary flushing, the self-cleaning can be realized by adopting the pumping pressure of the oily waste liquid and the scraper made of organic materials, impurities and waste liquid generated by cleaning are discharged into the pollution discharge tank for collection, and the impurities and the waste liquid in the pollution discharge tank are conveyed into the incinerator for incineration disposal after being pumped to the compatibility system for treatment, so that the compliance disposal of the impurities and the waste liquid discharged from the pretreatment system is effectively solved;
5) The pretreatment system fully considers reducing the abrasion of impurities to the spray gun when the oil-containing waste liquid needs to be atomized and sprayed during incineration disposal, and removes iron-containing fine particles through the primary and secondary magnetic filters and the primary to tertiary automatic cleaning and filtering devices, the granularity of the impurities is controlled to be not less than 100 meshes, and the spray gun is effectively protected.
Drawings
FIG. 1 is a schematic diagram of a frame structure of a pretreatment system of the present invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 1, the pretreatment system for incineration disposal of oil-containing waste liquid in a steel rolling system provided by the present invention includes: the device comprises a receiving and filtering unit 1, a storage tank 2, a conveying and filtering unit 3 and a spraying and burning unit 4 which are connected in sequence.
Preferably, the receiving filter unit 1 includes: the device comprises a primary magnetic filter 11, a primary automatic cleaning and filtering device 12 and a secondary automatic cleaning and filtering device 13 which are sequentially connected, wherein the secondary automatic cleaning and filtering device is connected with a storage tank; the abrasion of the iron-containing fine scraps and the like in the oil-containing waste liquid on a pumping system is large, and the abrasion is easy to be caused on a spray gun under high pressure and high flow rate, and the primary magnetic filter 11 is mainly used for adsorbing and removing the iron-containing fine scraps and iron-containing impurities possibly contained in the oil-containing waste liquid. The stability of the pumping system before the spray gun can be improved by the first-stage automatic cleaning and filtering device 12 and the second-stage automatic cleaning and filtering device 13, and in addition, the automatic cleaning and filtering device can realize unmanned on duty in a certain working period by adjusting proper working parameters in production practice, and the automatic filter is additionally provided with an opening auxiliary facility, so that the periodic impurity cleaning is convenient, and the manual operation of the filter is reduced.
Preferably, the oil-containing waste liquid after receiving the filtering unit 1 enters the storage tank 2, and the storage tank 2 is insulated by utilizing steam generated by preheating and filtering in the spraying and burning unit 4 (the insulation temperature is 60-80 ℃), so that the viscosity of the oil-containing waste liquid is kept low, and meanwhile, impurities in the oil-containing waste liquid are further separated.
Preferably, the conveying and filtering unit 3 includes: the secondary magnetic filter 31 and the tertiary automatic cleaning and filtering device 32 are sequentially connected, the secondary magnetic filter 31 is connected with the storage tank 2, and the tertiary automatic cleaning and filtering device 32 is connected with the spraying and burning unit 4; the secondary magnetic filter 31 further adsorbs and removes iron-containing fines and possibly iron-containing impurities of the oily waste liquid. The three-stage automatic cleaning and filtering device 32 can also increase the stability of the pumping system before the spray gun, in addition, the automatic cleaning and filtering device can realize unmanned on duty in a certain working period by adjusting proper working parameters in production practice, and the automatic filter is additionally provided with an opening auxiliary facility, so that the periodic impurity cleaning is convenient, and the manual operation of the filter is reduced.
Preferably, the method further comprises: and a sewage disposal incineration unit 5. The blowdown incineration unit 5 comprises: the sewage tank 51 is connected with the primary automatic cleaning and filtering device 12, the secondary automatic cleaning and filtering device 13 and the tertiary automatic cleaning and filtering device 32. Primary magnetic filter 11 and secondary magnetic filter 31 may be cleaned for adsorption operations and maintenance during a pretreatment system shutdown. The primary automatic cleaning and filtering device 12, the secondary automatic cleaning and filtering device 13 and the tertiary automatic cleaning and filtering device 32 do not need to adopt external media for auxiliary flushing, can adopt the pressure of oil-containing waste liquid pumping and an organic material scraper to realize self-cleaning, impurities and waste liquid generated by cleaning are discharged into the blowdown tank 51 for collection, and impurities and waste liquid in the blowdown tank 51 are incinerated after being matched by pumping to the matched incineration device 52.
Preferably, the filter screen of the first-stage automatic cleaning filter device 12 is 20-40 mesh.
Preferably, the filter screen of the secondary automatic cleaning and filtering device 13 is 40-80 mesh.
Preferably, the filter screen of the three-stage automatic cleaning and filtering device 32 is 80-100 mesh.
Preferably, the firing unit 4 includes: incinerator and waste heat boiler.
Preferably, a plurality of spray guns are arranged in the incinerator.
The invention also provides a pretreatment method before incineration disposal of the oil-containing waste liquid of the steel rolling system, which comprises the following processes:
1) The oil-containing waste liquid generated in the steel rolling process flows into the primary magnetic filter 11 through the pump set, and iron-containing fine particles in the oil-containing waste liquid are adsorbed by the primary magnetic filter 11;
2) The oily waste liquid treated by the step 1) flows into a first-stage automatic cleaning and filtering device 12 and a second-stage automatic cleaning and filtering device 13 in sequence, and flows into a storage tank 2;
3) The oily waste liquid in the storage tank 2 flows into the secondary magnetic filter 31 again, and the secondary magnetic filter 31 is utilized to further adsorb iron-containing fine particles in the oily waste liquid;
4) The oily waste liquid treated by the step 3) flows into a three-stage automatic cleaning and filtering device 32 for filtering;
5) Finally, the oily waste liquid flows into the spraying and burning unit 4 for disposal.
Preferably, the method further comprises: step 5), the impurities and the waste liquid generated after the self-cleaning of the primary automatic cleaning and filtering device 12, the secondary automatic cleaning and filtering device 13 and the tertiary automatic cleaning and filtering device 32 flow to the pollution discharge tank 51 to be collected, and finally are treated by the compatible incineration device 52.
Preferably, the storage tank 2, the pollution discharge tank and the waste liquid conveying pipeline are insulated by utilizing steam generated by a preheating boiler in the spraying unit 4 (the temperature of the insulation is 60-80 ℃), so that the viscosity of the oil-containing waste liquid is kept low, and meanwhile, impurities in the oil-containing waste liquid are further separated.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the invention, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the invention as long as they fall within the true spirit of the invention.
Claims (5)
1. A pretreatment system for incineration disposal of oily waste liquid of a steel rolling system, comprising: the device comprises a receiving and filtering unit, a storage tank, a conveying and filtering unit and a burning unit which are connected in sequence;
the reception filter unit includes: the device comprises a first-stage magnetic filter, a first-stage automatic cleaning and filtering device and a second-stage automatic cleaning and filtering device which are sequentially connected, wherein the second-stage automatic cleaning and filtering device is connected with a storage tank;
the transport filter unit includes: the secondary magnetic filter is connected with the storage tank, and the tertiary automatic cleaning and filtering device is connected with the spraying and burning unit;
further comprises: a sewage discharge incineration unit,
the blowdown incineration unit comprises: the sewage tank is connected with the primary automatic cleaning and filtering device, the secondary automatic cleaning and filtering device and the tertiary automatic cleaning and filtering device in sequence,
the filter screen of the first-stage automatic cleaning filter device is 20-40 meshes,
the filter screen of the secondary automatic cleaning and filtering device is 40-80 meshes,
the filter screen of the three-stage automatic cleaning and filtering device is 80-100 meshes,
the first-stage automatic cleaning and filtering device, the second-stage automatic cleaning and filtering device and the third-stage automatic cleaning and filtering device are additionally provided with auxiliary starting facilities, no external medium is needed for auxiliary flushing,
the storage tank and the blowdown tank are insulated by utilizing steam generated by the waste heat boiler,
the pretreatment system for the oil-containing waste liquid incineration disposal of the steel rolling system executes the following pretreatment method for the oil-containing waste liquid incineration disposal, and the pretreatment method comprises the following processes:
1) The oil-containing waste liquid generated in the steel rolling process flows into a primary magnetic filter through a pump set, and iron-containing fine particles in the oil-containing waste liquid are adsorbed by the primary magnetic filter;
2) The oily waste liquid treated by the step 1) flows into a first-stage automatic cleaning and filtering device and a second-stage automatic cleaning and filtering device in sequence, and then flows into a storage tank;
3) The oily waste liquid in the storage tank flows into a secondary magnetic filter, and iron-containing fine particles in the oily waste liquid are further adsorbed by the secondary magnetic filter;
4) The oily waste liquid treated by the step 3) flows into a three-stage automatic cleaning and filtering device for filtering;
5) Finally, the oily waste liquid flows into a spraying unit for treatment.
2. A pretreatment system for incineration disposal of oil-containing waste liquid of steel rolling system as claimed in claim 1, wherein: the spraying and burning unit comprises: the incinerator, the waste liquid spray gun that sets up in the incinerator, valves, have waste liquid atomizing medium and exhaust-heat boiler of pressure.
3. A pretreatment system for incineration disposal of oil-containing waste liquid of steel rolling system as claimed in claim 2, wherein: the incinerator is internally provided with a plurality of spray guns.
4. A pretreatment method before incineration disposal of an oily waste liquid based on the pretreatment system before incineration disposal of an oily waste liquid for a steel rolling system according to any one of claims 1 to 3, comprising the following processes:
1) The oil-containing waste liquid generated in the steel rolling process flows into a primary magnetic filter through a pump set, and iron-containing fine particles in the oil-containing waste liquid are adsorbed by the primary magnetic filter;
2) The oily waste liquid treated by the step 1) flows into a first-stage automatic cleaning and filtering device and a second-stage automatic cleaning and filtering device in sequence, and then flows into a storage tank;
3) The oily waste liquid in the storage tank flows into a secondary magnetic filter, and iron-containing fine particles in the oily waste liquid are further adsorbed by the secondary magnetic filter;
4) The oily waste liquid treated by the step 3) flows into a three-stage automatic cleaning and filtering device for filtering;
5) Finally, the oily waste liquid flows into a spraying unit for treatment.
5. A pretreatment method for oil-containing waste liquid incineration pre-treatment for pretreatment system for oil-containing waste liquid incineration pre-treatment of steel rolling system according to claim 4, further comprising: step 5), the impurities and the waste liquid generated after the self-cleaning of the primary automatic cleaning and filtering device, the secondary automatic cleaning and filtering device and the tertiary automatic cleaning and filtering device flow to a pollution discharge tank to be collected, and finally, the impurities and the waste liquid are treated by a compatible incineration device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810693620.6A CN108613200B (en) | 2018-06-29 | 2018-06-29 | Pretreatment system and pretreatment method for oil-containing waste liquid of steel rolling system before incineration disposal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810693620.6A CN108613200B (en) | 2018-06-29 | 2018-06-29 | Pretreatment system and pretreatment method for oil-containing waste liquid of steel rolling system before incineration disposal |
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| CN108613200B true CN108613200B (en) | 2024-03-12 |
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| CN114060823A (en) * | 2020-07-31 | 2022-02-18 | 宝山钢铁股份有限公司 | Waste emulsion treatment system utilizing boiler of power plant |
| CN112113230A (en) * | 2020-08-19 | 2020-12-22 | 上海立得催化剂有限公司 | White oil waste liquid treatment system and treatment method thereof |
| 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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