CN112756380A - Harmless treatment method for waste steel barrels - Google Patents
Harmless treatment method for waste steel barrels Download PDFInfo
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- CN112756380A CN112756380A CN202011634045.6A CN202011634045A CN112756380A CN 112756380 A CN112756380 A CN 112756380A CN 202011634045 A CN202011634045 A CN 202011634045A CN 112756380 A CN112756380 A CN 112756380A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 212
- 239000010959 steel Substances 0.000 title claims abstract description 212
- 239000002699 waste material Substances 0.000 title claims abstract description 160
- 238000011282 treatment Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 67
- 238000005422 blasting Methods 0.000 claims abstract description 93
- 239000000463 material Substances 0.000 claims abstract description 74
- 238000010438 heat treatment Methods 0.000 claims abstract description 69
- 238000001035 drying Methods 0.000 claims abstract description 43
- 239000003973 paint Substances 0.000 claims abstract description 13
- 238000009991 scouring Methods 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 40
- 229910052742 iron Inorganic materials 0.000 claims description 20
- 238000004140 cleaning Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000428 dust Substances 0.000 description 54
- 239000007789 gas Substances 0.000 description 42
- 239000007788 liquid Substances 0.000 description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 24
- 239000002910 solid waste Substances 0.000 description 24
- 230000007246 mechanism Effects 0.000 description 23
- 239000002912 waste gas Substances 0.000 description 23
- 239000003570 air Substances 0.000 description 17
- 239000000843 powder Substances 0.000 description 17
- 239000007921 spray Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 15
- 238000001179 sorption measurement Methods 0.000 description 14
- 239000003921 oil Substances 0.000 description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- 238000012856 packing Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000009471 action Effects 0.000 description 10
- 238000003860 storage Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 7
- 239000012855 volatile organic compound Substances 0.000 description 7
- 238000011010 flushing procedure Methods 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 6
- 239000008239 natural water Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000012459 cleaning agent Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 238000006386 neutralization reaction Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000036760 body temperature Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- BGTOWKSIORTVQH-UHFFFAOYSA-N cyclopentanone Chemical compound O=C1CCCC1 BGTOWKSIORTVQH-UHFFFAOYSA-N 0.000 description 2
- 238000004200 deflagration Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- ODLMAHJVESYWTB-UHFFFAOYSA-N propylbenzene Chemical compound CCCC1=CC=CC=C1 ODLMAHJVESYWTB-UHFFFAOYSA-N 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000026058 directional locomotion Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/083—Removing scrap from containers, e.g. removing labels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application relates to the technical field of steel drum processing, and particularly discloses a harmless treatment method for waste steel drums. The harmless treatment method of the waste steel barrel specifically comprises the following steps: heating the waste steel barrel to 30-60 ℃ in a sealed negative pressure environment, pouring out liquefied residual materials in the waste steel barrel, and keeping a pouring state for 10-30 s; continuously heating to 80-350 ℃, and heating and drying under a negative pressure state until the residual materials are solidified and agglomerated; and performing shot blasting treatment by using high-speed scouring of steel shots to remove residual materials and external paint. The treatment method provided by the application has the advantages that the organic residue removal rate is high and the environment-friendly technical effect is achieved by heating in two steps and combining with physical shot blasting treatment.
Description
Technical Field
The application relates to the technical field of steel drum processing, in particular to a harmless treatment method of waste steel drums.
Background
With the enhancement of environmental consciousness and social responsibility of enterprises, the common waste steel barrels of less than 200L on the market need to be subjected to harmless treatment so as to reduce the pollution of organic residues such as latex, viscose, paint, chemical auxiliaries, lubricating oil, cleaning oil and the like in the waste steel barrels to the environment.
At present, the treatment mode of the waste steel barrel with the volume of below 200L is mainly as follows: the waste steel is cleaned by a solvent with good solubility, crushed, sent into an incinerator for incineration and finally cooled to normal temperature, and then iron blocks are collected.
In view of the above-mentioned related technologies, the inventor believes that after the waste steel drum is cleaned, some organic residues still adhere to the seams and corners of the steel drum, resulting in a low organic residue removal rate. Meanwhile, after the waste steel barrel with organic residues enters the next working procedure, the incineration temperature of the waste steel barrel can reach 700-.
Disclosure of Invention
In order to improve the removal rate of organic residues in the waste steel on the basis of reducing environmental pollution, the application provides a harmless treatment method of a waste steel barrel.
The harmless treatment method for the waste steel barrels adopts the following technical scheme:
a harmless treatment method of waste steel barrels comprises the following steps:
heating and controlling materials: heating the waste steel barrel to 30-60 ℃ in a sealed negative pressure environment, pouring out liquefied residual materials in the waste steel barrel, and keeping a pouring state for 10-30 s;
heating and drying: continuously heating to 80-350 ℃, and heating and drying under a negative pressure state until the residual materials are solidified and agglomerated;
shot blasting: and performing shot blasting treatment by using high-speed scouring of steel shots to remove residual materials and external paint.
By adopting the technical scheme, because two temperature rising operations of pre-treatment and heating and drying are adopted, the residual materials on the inner wall of the waste steel barrel are liquefied into liquid organic matters with reduced viscosity and certain flow velocity at the temperature after the temperature is raised to 30-60 ℃, so that the flow of the residual materials can be accelerated to achieve the purpose of quickly pouring the materials. And then, after the temperature is further raised to 80-350 ℃, the residual materials are heated at a higher temperature and are solidified and agglomerated in the waste steel barrel, and then shot blasting treatment is carried out on the residual materials in a physical mode, so that the removal rate of organic residues in the waste steel is improved, the multiple pollution of the organic residues to the atmosphere and water is further reduced, and the method is environment-friendly.
Preferably, a cover is arranged between the heating material control and the heating drying, and the barrel body, the barrel bottom and the barrel edge of the waste steel barrel are separated from each other.
By adopting the technical scheme, the step of falling the cover is added, the subsequent heating drying and shot blasting operation are conveniently and effectively carried out, and the working efficiency is greatly improved.
Preferably, the method further comprises the following steps between the cover falling and the heating and drying:
unfolding the splitting plate: splitting and unfolding the barrel body of the waste steel barrel with the bottom and the edge being fallen;
pressing materials: extruding and cleaning liquefied residual materials on the board after the split board is unfolded;
flattening: scraping and cleaning liquefied residual materials on the board after the splitting board is unfolded.
By adopting the technical scheme, the method has the advantages that,
preferably, the method further comprises the following steps between the cover falling and the heating and drying:
unfolding the splitting plate: splitting and unfolding the barrel body of the waste steel barrel with the bottom and the edge being fallen;
flattening: scraping and cleaning liquefied residual materials on the board after the splitting board is unfolded.
By adopting the technical scheme, preferably, in the shot blasting, the waste steel barrel is overturned in the sealed negative pressure shot blasting chamber, the pressure of the shot blasting chamber is-50 to-10 pa, shot blasting treatment is uniformly carried out on the inner surface and the outer surface of the waste steel barrel through barrel body shot blasting equipment so as to peel off residual substances in the barrel, and then the waste steel barrel after the shot blasting treatment is subjected to briquetting and volume reduction to form a waste iron block.
By adopting the technical scheme, because the two steps of mutual matching operation of drying, curing and shot blasting residue removal are adopted, the residues cured on the inner wall of the waste steel barrel are washed away at a high speed by the steel shot, the cured residues can be effectively removed under the impact action of the steel shot, the high-speed washing of the steel shot is beneficial to the modification of a microstructure structure, the fatigue fracture resistance of the barrel wall of the waste steel barrel is improved, the fatigue failure, the plastic deformation and the brittle fracture are prevented, and the fatigue life is prolonged.
And then, post-treatment is carried out on the waste iron barrels after the harmless treatment, so that the waste iron barrels can be used as iron blocks for sale through compression, and the resource utilization rate of the waste iron barrels is improved.
Preferably, in the shot blasting, the waste steel barrel is turned in a sealed negative pressure shot blasting chamber, the pressure of the shot blasting chamber is-50 to-10 pa, shot blasting treatment is uniformly carried out on the inner surface and the outer surface of the waste steel barrel through barrel body shot blasting equipment so as to peel off residual substances in the barrel, and then the waste steel barrel after the shot blasting treatment is subjected to cover cutting, plate splitting and flattening to prepare a plate.
By adopting the technical scheme, because the two steps of mutual matching operation of drying, curing and shot blasting residue removal are adopted, the residues cured on the inner wall of the waste steel barrel are washed away at a high speed by the steel shot, the cured residues can be effectively removed under the impact action of the steel shot, the high-speed washing of the steel shot is beneficial to the modification of a microstructure structure, the fatigue fracture resistance of the barrel wall of the waste steel barrel is improved, the fatigue failure, the plastic deformation and the brittle fracture are prevented, and the fatigue life is prolonged.
And then, post-treating the waste iron barrel subjected to harmless treatment, so that the waste iron barrel can be made into an iron plate for sale after processes of cover cutting, plate splitting and flattening, and the resource utilization rate of the waste iron barrel is improved.
Preferably, the cover is arranged between the heating material control and the heating drying, and the barrel body, the barrel bottom and the barrel edge of the waste steel barrel are separated from each other.
Preferably, the method further comprises the step of digging the barrel before heating and controlling the materials, and the stacked waste steel barrels are torn open and divided into single steel barrels.
By adopting the technical scheme, the stacked waste steel barrels are separated into the single steel barrel, so that the subsequent treatments such as heating control, splitting plate expansion and the like are more convenient to effectively carry out.
Preferably, in the heating and drying process, the drying temperature is 100-200 ℃, the pressure is-50 to-10 pa, and the drying time is 10-20 s.
By adopting the technical scheme, the drying temperature and the drying pressure are further limited, and the negative pressure is kept in the process of solidifying the organic residues, so that the tail gas and the dust generated by processing can be quickly discharged out of a workshop by means of the tail gas treatment device, the influence of harmful components such as organic volatile matters (Voc), solid waste residues and powder in the tail gas on the body health of workers in the workshop is reduced, and the production safety is improved.
Preferably, in the shot blasting, the shot blasting is carried out for 1 to 10 times, and the single shot blasting time is 10 to 60 seconds.
Preferably, in the shot blasting, the shot blasting can be further selected to be 2-5 times, and the single shot blasting time is 10-20 s.
By adopting the technical scheme, because the shot blasting times are limited and the shot blasting time is controlled once, the phenomenon that the inner wall of the waste steel barrel is excessively polished by shot blasting can be reduced, and the solidified residual materials in the waste steel barrel can be uniformly distributed on the inner wall by utilizing higher drying temperature (namely 100 plus 200 ℃), and the solidified residual materials can be effectively removed by high-speed scouring of the steel shots, so that a better residual material removing effect is obtained.
In summary, the present application has the following beneficial effects:
1. according to the method, the residual materials on the inner wall of the waste steel barrel are liquefied into liquid organic matters with reduced viscosity and certain flow rate after the temperature is raised at first, then the residual materials in the waste steel barrel can be heated, solidified and agglomerated after the temperature is continuously raised, and then physical shot blasting treatment is combined, so that the technical effects of good organic residue removal rate and environmental friendliness are achieved.
2. Preferentially adopt hot-blast mode to heat old and useless steel drum in this application, because the liquefaction to organic residue in the old and useless bucket can be accelerated to hot-blast heat, not only the heating temperature controllability is good, and hot-blast moreover can further promote the directional motion of liquefied defective material in old and useless steel drum, has obtained the effect of pouring the material with higher speed.
3. According to the method, the number of shot blasting times is limited, and the time of single shot blasting treatment is controlled, so that the phenomenon that the inner wall of the waste steel barrel is excessively polished by shot blasting treatment can be reduced, the residual materials can be uniformly solidified on the inner wall of the waste steel barrel by using the drying temperature of 100 plus 200 ℃, the solidified residual materials can be effectively removed by high-speed scouring of the steel shots, and a good residual and impurity removing effect is achieved.
Detailed Description
The present application will be described in further detail with reference to examples.
Examples
Example 1: a harmless treatment method of waste steel barrels can treat waste steel barrels with the volume of less than 200L, wherein the harmless resource treatment of small steel barrels with the volume of 20-25L is mainly aimed at, and the treatment method specifically comprises the following steps:
step one, pretreatment: firstly, a cover of a waste steel barrel to be treated is cut by adopting an oil barrel cover opener (Ningchen platform, Rehong, China Hebei) with the model number of YGJ-160, the waste steel barrel is heated to 50 ℃ by hot air under the sealed negative pressure environment of-25 pa, then the waste steel barrel is turned over, the barrel opening is downward to pour liquefied residues in the waste steel barrel, and the pouring state is kept for 20 s.
The pretreatment process adopts totally-enclosed space operation; meanwhile, the waste gas, discrete solid waste residues and powder generated in the pretreatment are collected by a tail gas collecting mechanism and then discharged into a tail gas treatment device for centralized treatment, and the waste gas, discrete solid waste residues and powder are discharged through an exhaust funnel after reaching the standard in detection. The tail gas treatment device sequentially comprises a cyclone dust collector and a bag-type dust collector according to the movement direction of tail gas. The cyclone dust collector can be selected from an XFCC (XFCC) cyclone dust collector (Zhenghe machine) and can also be selected from a high-efficiency cyclone dust collector (Zhenghe machine) with the model number of XD-II-0.5. The YDL-G high-temperature bag-type dust collector can be selected as the bag-type dust collector (easy availability), and the YDL filter bag-type dust collector (easy availability) can also be selected as the bag-type dust collector.
In addition, the solid waste residue with larger mass is manually collected and then is conveyed to a waste warehouse for storage, and qualified units can be entrusted to dispose.
Step two, heating and drying: and (3) continuously heating the waste steel barrel obtained after the pretreatment in the step one to 150 ℃ by hot air, continuously heating and drying for 15s under a negative pressure state of-25 pa until the residual materials are solidified, and forming a plurality of solidified lumps on the inner wall of the waste steel barrel.
Meanwhile, the waste gas, part of discrete solid waste residues and powder generated in the heating and drying step are collected by a tail gas collecting mechanism and then discharged into a tail gas treatment device for centralized treatment, and the waste gas, part of discrete solid waste residues and part of discrete powder are discharged through an exhaust funnel after being detected to reach the standard. The tail gas treatment device sequentially comprises a spray tower, a cyclone dust collector, a bag-type dust collector and an active carbon adsorption tower according to the movement direction of tail gas.
The utility model provides a horizontal spray column (ding cheng environmental protection) can be selected to the spray column, and above-mentioned horizontal spray column includes annexes such as tower body, liquid distributor, grid, packing layer, defroster, liquid storage tank, various interfaces and observation hole. After waste gas outside the horizontal spray tower body enters the tower body, the waste gas enters the packing layer, spray liquid (natural water) from the top and the front spray liquid (natural water) are arranged on the packing layer, a layer of liquid film is formed on the packing, when the gas flows through the packing gap, the gas is contacted with the packing liquid film to carry out absorption or neutralization reaction, and the gas after absorption or neutralization is collected by the demister and then is discharged out of the tower through the air outlet. The liquid on the liquid film flows into the liquid storage tank under the action of gravity and is pumped out by the circulating pump for circulation.
The cyclone dust collector can be selected from an XFCC (XFCC) cyclone dust collector (Zhenghe machine) and can also be selected from a high-efficiency cyclone dust collector (Zhenghe machine) with the model number of XD-II-0.5. The YDL-G high-temperature bag-type dust collector can be selected as the bag-type dust collector (easy availability), and the YDL filter bag-type dust collector (easy availability) can also be selected as the bag-type dust collector. The activated carbon adsorption tower of the present application may be selected as an activated carbon particle adsorption tower (super-solar purification).
In addition, the solid waste residue with larger mass is collected and then conveyed to a waste warehouse for storage, and can be entrusted to qualified units for disposal.
Step three, shot blasting: the waste steel barrels are turned in a sealed negative pressure shot blasting chamber (wherein the pressure in the shot blasting chamber is-25 pa), barrel body shot blasting equipment (south side of pharmaceutical city of Tanzhou economic development district of producing area) with the model of LZTX 200-PW4W-000 is used, and high-speed flushing of the steel shots is utilized to uniformly perform shot blasting treatment on the inner surface and the outer surface of the waste steel barrels for 20s so as to remove internal residues and external paint of the waste steel barrels, thereby realizing stripping of residual substances in the barrels.
Meanwhile, waste gas, part of discrete solid waste residues and powder generated in the shot blasting step are collected by a tail gas collecting mechanism and then discharged into a tail gas treatment device for centralized treatment, and the waste gas, part of discrete solid waste residues and part of discrete powder are discharged through an exhaust funnel after being detected to reach the standard. Wherein the tail gas treatment device is selected from a bag-type dust remover. The YDL-G high-temperature bag-type dust collector can be selected as the bag-type dust collector (easy availability), and the YDL filter bag-type dust collector (easy availability) can also be selected as the bag-type dust collector.
Example 2: a harmless treatment method of waste steel barrels comprises the following steps:
step one, pretreatment: firstly, a cover of a waste steel barrel to be treated is cut by adopting an oil barrel cover opener (Ningchen platform, Rehong, China Hebei) with the model number of YGJ-160, the waste steel barrel is turned over after being heated to 30 ℃ by natural gas under the sealed negative pressure environment of-50 pa, the opening of the barrel is downward to pour liquefied residues in the waste steel barrel, and the pouring state is kept for 10 s.
The pretreatment process adopts totally-enclosed space operation; meanwhile, the waste gas, discrete solid waste residues and powder generated in the pretreatment are collected by a tail gas collecting mechanism and then discharged into a tail gas treatment device for centralized treatment, and the waste gas, discrete solid waste residues and powder are discharged through an exhaust funnel after reaching the standard in detection.
The tail gas treatment device sequentially comprises a cyclone dust collector, a bag-type dust collector and a tail gas treatment device according to the movement direction of the tail gas. The cyclone dust collector can be selected from an XFCC (XFCC) cyclone dust collector (Zhenghe machine) and can also be selected from a high-efficiency cyclone dust collector (Zhenghe machine) with the model number of XD-II-0.5. The YDL-G high-temperature bag-type dust collector can be selected as the bag-type dust collector (easy availability), and the YDL filter bag-type dust collector (easy availability) can also be selected as the bag-type dust collector. The activated carbon adsorption tower of the present application may be selected as an activated carbon particle adsorption tower (super-solar purification).
In addition, the solid waste residue with larger mass is manually collected and then is conveyed to a waste warehouse for storage, and qualified units can be entrusted to dispose.
Step two, heating and drying: and (4) continuously heating the waste steel barrel obtained by the pretreatment in the step one to 80 ℃ by natural gas, and continuously heating and drying for 20s under a negative pressure state of-50 pa until the residual materials are solidified and agglomerated.
Meanwhile, the waste gas, part of discrete solid waste residues and powder generated in the heating and drying step are collected by a tail gas collecting mechanism and then discharged into a tail gas treatment device for centralized treatment, and the waste gas, part of discrete solid waste residues and part of discrete powder are discharged through an exhaust funnel after being detected to reach the standard. The tail gas treatment device sequentially comprises a cyclone dust collector, a bag-type dust collector and an active carbon adsorption tower according to the movement direction of tail gas.
The cyclone dust collector can be selected from an XFCC (XFCC) cyclone dust collector (Zhenghe machine) and can also be selected from a high-efficiency cyclone dust collector (Zhenghe machine) with the model number of XD-II-0.5. The YDL-G high-temperature bag-type dust collector can be selected as the bag-type dust collector (easy availability), and the YDL filter bag-type dust collector (easy availability) can also be selected as the bag-type dust collector. The activated carbon adsorption tower of the present application may be selected as an activated carbon particle adsorption tower (super-solar purification).
In addition, the solid waste residue with larger mass is collected and then conveyed to a waste warehouse for storage, and can be entrusted to qualified units for disposal.
Step three, shot blasting: the waste steel barrels are turned in a sealed negative pressure shot blasting chamber (wherein the pressure in the shot blasting chamber is-50 pa), barrel body shot blasting equipment (south side of pharmaceutical city of Tanzhou economic development district of producing area) with the model of LZTX 200-PW4W-000 is used, and high-speed flushing of the steel shots is utilized to uniformly perform shot blasting treatment on the inner surface and the outer surface of the waste steel barrels for 10s so as to remove internal residues and external paint of the waste steel barrels, thereby realizing stripping of residual substances in the barrels.
And in the fourth step, the waste steel barrels after the shot blasting treatment in the third step are briquetted and reduced in volume to form waste iron blocks.
Example 3: a harmless treatment method of waste steel barrels comprises the following steps:
step one, pretreatment: firstly, a cover of a waste steel barrel to be treated is cut by adopting an oil barrel cover opener (Ningchen platform, Rehong, the production place is Hebei) with the model number of YGJ-160, the waste steel barrel is heated to 60 ℃ by zero diesel oil under the sealed negative pressure environment of-50 pa, then the liquefied residual materials in the waste steel barrel are removed, and the material pouring state is kept for 10 s.
The pretreatment process adopts totally-enclosed space operation; meanwhile, the waste gas, discrete solid waste residues and powder generated in the pretreatment are collected by a tail gas collecting mechanism and then discharged into a tail gas treatment device for centralized treatment, and the waste gas, discrete solid waste residues and powder are discharged through an exhaust funnel after reaching the standard in detection. Wherein, the tail gas treatment device comprises a bag-type dust collector and an active carbon adsorption tower in sequence according to the movement direction of the tail gas. The YDL-G high-temperature bag-type dust collector can be selected as the bag-type dust collector (easy availability), and the YDL filter bag-type dust collector (easy availability) can also be selected as the bag-type dust collector. The activated carbon adsorption tower of the present application may be selected as an activated carbon particle adsorption tower (super-solar purification).
In addition, the solid waste residue with larger mass is manually collected and then is conveyed to a waste warehouse for storage, and can be entrusted to qualified disposal units for disposal.
Step two, heating and drying: and (4) continuously heating the waste steel barrel obtained by the pretreatment in the step one to 350 ℃ by using zero-grade diesel oil, and continuously heating and drying under a negative pressure of-50 pa until the residual materials are solidified and agglomerated.
Meanwhile, the waste gas, part of discrete solid waste residues and powder generated in the heating and drying step are collected by a tail gas collecting mechanism and then discharged into a tail gas treatment device for centralized treatment, and the waste gas, part of discrete solid waste residues and part of discrete powder are discharged through an exhaust funnel after being detected to reach the standard. Wherein, the tail gas treatment device comprises a spray tower, a bag-type dust collector and an active carbon adsorption tower in sequence according to the movement direction of the tail gas.
The utility model provides a horizontal spray column (ding cheng environmental protection) can be selected to the spray column, and above-mentioned horizontal spray column includes annexes such as tower body, liquid distributor, grid, packing layer, defroster, liquid storage tank, various interfaces and observation hole. After waste gas outside the horizontal spray tower body enters the tower body, the waste gas enters the packing layer, spray liquid (natural water) from the top and the front spray liquid (natural water) are arranged on the packing layer, a layer of liquid film is formed on the packing, when the gas flows through the packing gap, the gas is contacted with the packing liquid film to carry out absorption or neutralization reaction, and the gas after absorption or neutralization is collected by the demister and then is discharged out of the tower through the air outlet. The liquid on the liquid film flows into the liquid storage tank under the action of gravity and is pumped out by the circulating pump for circulation.
The YDL-G high-temperature bag-type dust collector can be selected as the bag-type dust collector (easy availability), and the YDL filter bag-type dust collector (easy availability) can also be selected as the bag-type dust collector. The activated carbon adsorption unit of the present application may be selected as an activated carbon particle adsorption tower (super-day purification).
In addition, the solid waste residue with larger mass is collected and then conveyed to a waste warehouse for storage, and can be entrusted to qualified units for disposal.
Step three, shot blasting: the waste steel barrels are turned in a sealed negative pressure shot blasting chamber (wherein the pressure in the shot blasting chamber is-50 pa), barrel body shot blasting equipment (south side of pharmaceutical city of Tanzhou economic development district of producing area) with the model of LZTX 200-PW4W-000 is used, and high-speed flushing of the steel shots is utilized to uniformly perform shot blasting treatment on the inner surface and the outer surface of the waste steel barrels for 15s so as to remove internal residues and external paint of the waste steel barrels, thereby realizing stripping of residual substances in the barrels.
And step four, performing cover cutting, plate splitting and flattening processes on the waste steel barrel subjected to shot blasting treatment in the step three, and then manufacturing the waste steel barrel into an iron plate.
Example 4: a harmless treatment method of waste steel barrels is different from that of the embodiment 1 in that: in the first step, under a sealed negative pressure environment of-25 pa, the waste steel barrel is heated to 40 ℃ by hot air output by a hot air blower, and then the waste steel barrel is turned over, so that the barrel mouth is downward to dump the liquefied residual materials in the waste steel barrel, and the dumping state is maintained for 20 s.
Example 5: a harmless treatment method of waste steel barrels is different from that of the embodiment 1 in that: in the first step, the barrel cover of the waste steel barrel is not cut; and meanwhile, in the second step, the waste steel barrel is continuously heated by hot air to the barrel body temperature of 100 ℃ and the barrel bottom temperature of 115 ℃, then in the third step, under the environment of 150 ℃ and-25 pa, the bottom and the barrel body of the waste steel barrel are uniformly subjected to shot blasting treatment by utilizing high-speed flushing of steel shots, and the time of single shot blasting is 20 s. And then continuously heating the waste steel barrel to 167 ℃ of barrel body temperature and 130 ℃ of barrel bottom temperature by hot air, thereby completing twice heating drying and twice shot blasting treatment.
Example 6: a harmless treatment method of waste steel barrels is different from that of the embodiment 1 in that: in the first step, the barrel cover of the waste steel barrel is not cut; meanwhile, in the second step, the waste steel barrel is continuously heated by hot air to reach the barrel body temperature of 100 ℃ and the barrel bottom temperature of 115 ℃; heating and drying for 15s, then entering the third step, and uniformly performing shot blasting treatment on the inner surface and the outer surface of the waste steel barrel by utilizing high-speed flushing of steel shots on the bottom and the barrel body of the waste steel barrel at the temperature of 150 ℃ and under the environment of-25 pa. And then heating the waste steel barrel by hot air for the second time to 160 ℃ of the barrel body, drying the barrel bottom at 130 ℃ for 10s, and then uniformly performing shot blasting treatment on the inner surface and the outer surface of the waste steel barrel by utilizing high-speed flushing of steel shots on the bottom and the barrel body of the waste steel barrel under the environment of 150 ℃ and-25 pa. And then, carrying out third hot air heating on the waste steel barrel to 160 ℃ of the barrel body and 130 ℃ of the barrel bottom, and carrying out shot blasting treatment again after heating and drying for 15 s. Thereby completing five times of heat drying and five times of shot blasting treatment.
Example 7: a harmless treatment method of waste steel barrels is different from that of the embodiment 1 in that: in the third step, a collecting box for collecting discrete solid waste residues and partial powder obtained by shot blasting is arranged below the barrel body shot blasting equipment (south side of a pharmaceutical city main road in a Thai economic development area of the producing area) with the model of LZTX 200-PW4W-000, and the collecting box and the air suction hood of the tail gas collecting mechanism are arranged in a vertically corresponding mode. Meanwhile, natural water is filled in the collection box, and the natural water is filtered and pumped back to the collection box for continuous use after solid waste residues are collected by the auger.
Example 8: a harmless treatment method of waste steel barrels is different from that of the embodiment 1 in that: in the third step, a collecting box for collecting discrete solid waste residues and partial powder obtained by shot blasting is arranged below the barrel body shot blasting equipment (south side of a pharmaceutical city main road in a Thai economic development area of the producing area) with the model of LZTX 200-PW4W-000, and the collecting box and the air suction hood of the tail gas collecting mechanism are arranged in a vertically corresponding mode. Meanwhile, the collecting box is filled without water, the bottom of the collecting box is connected with an air suction pipe, and the air suction pipe is connected to a tail gas treatment device.
Example 9: a harmless treatment method of waste steel barrels comprises the following operation steps:
(1) and (4) stripping the stacked waste steel barrels, and dividing the waste steel barrels into single steel barrels. One of the specific operations in this embodiment may be: placing the stacked 20L steel barrels on a first chain machine; when the chain machine acts, the steel drum reaches a drum pressing position, the upper cylinder works to press a second drum body; and the barrel clamping edge mechanism clamps the first steel barrel under the action of the trolley cylinder, the first steel barrel is pulled open, then the first steel barrel is loosened, and the first steel barrel is rolled onto the barrel turning mechanism to turn the barrel onto the second chain machine.
(2) Heating and controlling materials: heating the waste steel barrel to 50 ℃ in a sealed negative pressure environment, pouring out the liquefied residual materials in the waste steel barrel, and keeping the pouring state for 20 s. One of the specific operations in this embodiment may be: putting the stacked and turned small steel barrels on a chain machine; when the chain machine acts, the steel drum to the high-frequency heating equipment respectively heat the drum body and the drum bottom; the lower part of the device is provided with a slag discharging mechanism, the material is conveyed to the collecting tank by using the screw conveyer and is matched with water spray, the material is conveyed after entering water, the conditions such as deflagration are avoided, and the device can suck away waste gas by arranging the upper part of the device on the side face of the device and the air suction inlet.
(3) And (4) dropping the cover to separate the barrel body, the barrel bottom and the barrel edge of the waste steel barrel from each other. One of the specific operations in this embodiment may be: placing the small steel barrel on the barrel supporting mechanism; the trolleys on the two sides work to clamp the steel drum, the motor on the trolleys drives the drum to rotate, the cutter cuts the drum bottom and the drum edge under the driving of the oil cylinder, and the large rotating disc of the trolleys in contact with the steel drum is provided with a spring mechanism which can eject and roll the drum bottom down when the trolleys on the two sides loosen the steel drum; the barrel frame is supported after the bottom and the edge fall, and the barrel frame is pressed to act simultaneously to separate the barrel body, the barrel bottom, the barrel edge and the like; the barrel supporting mechanism is provided with a barrel overturning frame, and the treated barrel body is overturned to the other side.
(4) Unfolding the splitting plate: and splitting and unfolding the barrel body of the waste steel barrel after the bottom and the edge fall. One of the specific operations in this embodiment may be: placing the barrel body with the bottom and the edge on the loose piece, enabling the riving knife oil cylinder to work, enabling the riving knife to descend, and starting steel barrel riving plate splitting; after the steel drum is split, the riving knife is reset, the loose piece is unfolded under the action of the material unfolding oil cylinder (a connecting rod mechanism is arranged on the rear side), the supporting block at the bottom rises to complete material unfolding on the drum body of the steel drum, and the residual material flows into the collecting tank along with the lower surface in the working engineering.
(5) Pressing materials: and extruding and cleaning liquefied residual materials on the board after the split board is unfolded. One of the specific operations in this embodiment may be: the interior of the expanded sheet is placed downwards on a feeding frame and pushed forwards, a driving wheel rotates to drive the sheet to move forwards, and an upper pressing wheel presses downwards under the action of an oil cylinder; the lower supporting wheel is supported upwards under the action of the oil cylinder; when the plate passes through, the driving wheel and the driven wheel are aligned and extruded, so that the residual materials on the plate are cleaned; the lower supporting wheels clean the residual materials on the driving wheel, and in the working process, the driving wheel and the two lower driven wheels are heated by heat conduction oil (aiming at increasing the fluidity of the residual materials); the upper wheel is not heated because the upper wheel is contacted with the outer wall of the steel drum (the residual material is less). All the flowed-down residual materials are collected by a collecting tank and cleaned in time.
(6) Flattening: scraping and cleaning liquefied residual materials on the board after the splitting board is unfolded. One of the specific operations in this embodiment may be: and (3) putting the plate (with the inner wall facing downwards) into an inlet of the equipment, enabling the plate to move forward after contacting with the flattening roller, enabling an outlet to be transmitted out after flattening, cleaning residues on the plate in the processing process, and collecting and transferring the residues in time.
(7) Heating and drying: continuously heating to 150 ℃, and heating and drying under the negative pressure state until the residual materials are solidified and agglomerated; one of the specific operations in this embodiment may be: and (3) putting the flattened plate into the furnace from the inlet, heating the plate at high frequency to dry the residual material on the plate (facilitating shot blasting treatment), and collecting smoke dust through a pipeline.
(8) Shot blasting: and performing shot blasting treatment by using high-speed scouring of steel shots to remove residual materials and external paint. One of the specific operations in this embodiment may be: and conveying the steel plate dried by high-frequency heating to a shot blasting machine, and performing shot blasting treatment on the surface of the steel plate.
Example 10: a harmless treatment method of waste steel barrels is different from that of the embodiment 1 in that: the shot blasting sequence is different, and the harmless treatment method comprises the following operation steps:
(1) and (4) stripping the stacked waste steel barrels, and dividing the waste steel barrels into single steel barrels. One of the specific operations in this embodiment may be: placing the stacked 20L steel barrels on a first chain machine; when the chain machine acts, the steel drum reaches a drum pressing position, the upper cylinder works to press a second drum body; and the barrel clamping edge mechanism clamps the first steel barrel under the action of the trolley cylinder, the first steel barrel is pulled open, then the first steel barrel is loosened, and the first steel barrel is rolled onto the barrel turning mechanism to turn the barrel onto the second chain machine.
(2) Heating and controlling materials: heating the waste steel barrel to 50 ℃ in a sealed negative pressure environment, pouring out the liquefied residual materials in the waste steel barrel, and keeping the pouring state for 20 s. One of the specific operations in this embodiment may be: putting the stacked and turned small steel barrels on a chain machine; when the chain machine acts, the steel drum to the high-frequency heating equipment respectively heat the drum body and the drum bottom; the lower part of the device is provided with a slag discharging mechanism, the material is conveyed to the collecting tank by using the screw conveyer and is matched with water spray, the material is conveyed after entering water, the conditions such as deflagration are avoided, and the device can suck away waste gas by arranging the upper part of the device on the side face of the device and the air suction inlet.
(3) And (4) dropping the cover to separate the barrel body, the barrel bottom and the barrel edge of the waste steel barrel from each other. One of the specific operations in this embodiment may be: placing the small steel barrel on the barrel supporting mechanism; the trolleys on the two sides work to clamp the steel drum, the motor on the trolleys drives the drum to rotate, the cutter cuts the drum bottom and the drum edge under the driving of the oil cylinder, and the large rotating disc of the trolleys in contact with the steel drum is provided with a spring mechanism which can eject and roll the drum bottom down when the trolleys on the two sides loosen the steel drum; the barrel frame is supported after the bottom and the edge fall, and the barrel frame is pressed to act simultaneously to separate the barrel body, the barrel bottom, the barrel edge and the like; the barrel supporting mechanism is provided with a barrel overturning frame, and the treated barrel body is overturned to the other side.
(4) Unfolding the splitting plate: and splitting and unfolding the barrel body of the waste steel barrel after the bottom and the edge fall. One of the specific operations in this embodiment may be: placing the barrel body with the bottom and the edge on the loose piece, enabling the riving knife oil cylinder to work, enabling the riving knife to descend, and starting steel barrel riving plate splitting; after the steel drum is split, the riving knife is reset, the loose piece is unfolded under the action of the material unfolding oil cylinder (a connecting rod mechanism is arranged on the rear side), the supporting block at the bottom rises to complete material unfolding on the drum body of the steel drum, and the residual material flows into the collecting tank along with the lower surface in the working engineering.
(5) Flattening: scraping and cleaning liquefied residual materials on the board after the splitting board is unfolded. One of the specific operations in this embodiment may be: and (3) putting the plate (with the inner wall facing downwards) into an inlet of the equipment, enabling the plate to move forward after contacting with the flattening roller, enabling an outlet to be transmitted out after flattening, cleaning residues on the plate in the processing process, and collecting and transferring the residues in time.
(6) Heating and drying: continuously heating to 150 ℃, and heating and drying under the negative pressure state until the residual materials are solidified and agglomerated; one of the specific operations in this embodiment may be: and (3) putting the flattened plate into the furnace from the inlet, heating the plate at high frequency to dry the residual material on the plate (facilitating shot blasting treatment), and collecting smoke dust through a pipeline.
(7) Shot blasting: and performing shot blasting treatment by using high-speed scouring of steel shots to remove residual materials and external paint. One of the specific operations in this embodiment may be: and conveying the steel plate dried by high-frequency heating to a shot blasting machine, and performing shot blasting treatment on the surface of the steel plate.
Comparative example
Comparative example 1: a harmless treatment method of waste steel barrels is different from that of the embodiment 1 in that: the waste steel drum is cleaned and renovated by a wet method, and the main procedures are as follows: adopting a water ring type vacuum liquid suction machine to remove residual liquid in the barrel → a practical automatic rust and paint removing cleaning machine for the iron barrel to clean the surface of the barrel → shaping of the barrel body at the barrel edge → adding a cleaning agent and an abrasive to clean the inner wall of the barrel → detecting and washing the iron barrel → spraying paint on the barrel body. In the above cleaning residue process, the cleaning agent added was made by mixing 50 wt% of propylbenzene, 30 wt% of cyclopentanone and 20 wt% of trichloroethylene.
Comparative example 2: a harmless treatment method of waste steel barrels is different from that of the embodiment 1 in that: the waste steel drum is cleaned and renovated by a wet method, and the main procedures are as follows: adopting a water ring type vacuum liquid suction machine to remove residual liquid in the barrel → a practical automatic rust and paint removing cleaning machine for the iron barrel to clean the surface of the barrel → shaping of the barrel body at the barrel edge → adding a cleaning agent and an abrasive to clean the inner wall of the barrel → detecting and washing the iron barrel → spraying paint on the barrel body. In the above-mentioned process of cleaning residues, the cleaning agent added was prepared by mixing 10 wt% ethanol, 40 wt% ethyl acetate and 50 wt% N, N-dimethylformamide.
Comparative example 3: a harmless treatment method of waste steel barrels is different from that of the embodiment 1 in that: and (4) drying and heating operation is not carried out, and shot blasting operation is directly carried out after the pretreatment operation in the step one is finished.
Comparative example 4: a harmless treatment method of waste steel barrels is different from that of the embodiment 1 in that: the pretreatment operation of the first step is not needed, and the operation of the second step and the operation of the third step are directly carried out.
Performance testing test subjects: the waste steel barrels treated according to the examples 1 to 7 were used as test samples 1 to 7, and the waste steel barrels treated according to the comparative examples 1 to 4 were used as control samples 1 to 4, and the total number of the groups was 11, and each group had 30 small samples.
Detection standard:
1. the thickness of the steel scrap (iron) is detected according to GB/T4223 steel scrap (iron), the wall thickness and the top cover are required to be more than or equal to 0.9mm, and the thickness of the bottom cover is required to be more than or equal to 1.0 mm. The visual observation of the nodular metal material has no liquid dripping, no peculiar smell and no impurities.
2. According to the technology of a portable monitor for total hydrocarbons, methane and non-methane total hydrocarbons of HJ 1012 ambient air and waste gasThe technical requirement and the detection method, the non-methane total hydrocarbon value (volatile organic compound emission standard) monitored by the standard requirement is not more than 30mg/m3。
3. And detecting the exhaust emission according to GB 16297 comprehensive emission standard of atmospheric pollutants.
4. And (4) detecting the production wastewater according to the water quality standard of GB/T31962 sewage discharged into town sewers.
Test method
First, appearance inspection
The thickness of the scrap (iron) of examples 1 to 7 and comparative examples 1 to 4 was measured, and it was visually checked whether or not the nodular metal material had dripping, odor, inclusions, etc.
Secondly, detecting waste gas and production wastewater
Waste gas that produces among the innocent treatment method of old and useless steel barrel of this application accords with local standard and GB 16297's requirement, also accords with VOCs simultaneously and discharges the standard that accords with local volatile organic compounds and discharge.
The waste water generated in the harmless treatment method of the waste steel barrel meets the requirement of entering an urban pipe network GB/T31962, and also meets the GB 8978 standard and the local standard.
Third, barrel body organic matter residue test
The average value of the non-methane total hydrocarbon values was monitored using a portable VOCs detector test at 15cm inside the barrels of examples 1 to 7 and comparative examples 1 to 4 from the bung, with reference to HJ 1012, and registered in table 1.
TABLE 1
TABLE 2
And (3) test results:
as can be seen by combining examples 1-4, examples 7-8 and comparative example 1 with Table 1, the average VOC off-gas concentration of comparative example 1 was 12.5mg/m under the same shot blasting number operation3However, the average VOC exhaust gas concentration of examples 1 to 4 and examples 7 to 8 was 2.5mg/m3The following. Therefore, the harmless treatment method of the waste steel barrel can effectively remove the content of volatile organic compounds in the barrel, and improves the hazardous waste treatment efficiency of the waste steel barrel.
It can be seen from the combination of examples 4 to 5 and comparative example 1 and table 1 that, compared to comparative example 1, the thickness abrasion thickness difference of the drum wall of example 4 increases to 0.12mm and the thickness abrasion thickness difference of the drum wall of example 5 increases to 0.15mm after the shot blasting times of examples 4 to 5 are increased, but the abrasion thickness differences of examples 4 and 5 both meet the detection requirements.
As can be seen by combining examples 1-8 and comparative examples 1-2 and combining tables 1 and 2, no wastewater is generated in examples 1-5 and example 7, and the water environment is well protected; the maximum amount of discharged water is expected to be 13600t per year in example 6, but the discharge amount of waste water of comparative example 1 and comparative example 2 is 8 to 10 times that of example 6. Therefore, the harmless treatment method of the waste steel barrel can reduce the discharge amount of sewage to a great extent, even can achieve the standard of no waste water discharge, and is environment-friendly; meanwhile, various emission data processing of the waste gas all accord with the detection standard.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. A harmless treatment method of waste steel barrels is characterized by comprising the following steps:
heating and controlling materials: heating the waste steel barrel to 30-60 ℃ in a sealed negative pressure environment, pouring out liquefied residual materials in the waste steel barrel, and keeping a pouring state for 10-30 s;
heating and drying: continuously heating to 80-350 ℃, and heating and drying under a negative pressure state until the residual materials are solidified and agglomerated;
shot blasting: and performing shot blasting treatment by using high-speed scouring of steel shots to remove residual materials and external paint.
2. The method for the harmless treatment of the waste steel barrels according to claim 1, which is characterized in that: a cover is also arranged between the heating and material controlling and the heating and drying, and the barrel body, the barrel bottom and the barrel edge of the waste steel barrel are mutually separated.
3. The method for the harmless treatment of the waste steel barrels according to claim 2, which is characterized in that: between falling the lid and heating stoving still include:
unfolding the splitting plate: splitting and unfolding the barrel body of the waste steel barrel with the bottom and the edge being fallen;
pressing materials: extruding and cleaning liquefied residual materials on the board after the split board is unfolded;
flattening: scraping and cleaning liquefied residual materials on the board after the splitting board is unfolded.
4. The method for the harmless treatment of the waste steel barrels according to claim 2, which is characterized in that: between falling the lid and heating stoving still include:
unfolding the splitting plate: splitting and unfolding the barrel body of the waste steel barrel with the bottom and the edge being fallen;
flattening: scraping and cleaning liquefied residual materials on the board after the splitting board is unfolded.
5. The method for the harmless treatment of the waste steel barrels according to claim 1, which is characterized in that: in the shot blasting process, the waste steel barrel is turned in a sealed negative pressure shot blasting chamber, the pressure of the shot blasting chamber is-50 to-10 pa, shot blasting treatment is uniformly carried out on the inner surface and the outer surface of the waste steel barrel through barrel body shot blasting equipment to realize stripping of residual substances in the barrel, and then the waste steel barrel after the shot blasting treatment is subjected to briquetting and volume reduction to form a waste iron block.
6. The method for the harmless treatment of the waste steel barrels according to claim 1, which is characterized in that: in the shot blasting process, the waste steel barrel is turned in a sealed negative pressure shot blasting chamber, the pressure of the shot blasting chamber is-50 to-10 pa, shot blasting treatment is uniformly carried out on the inner surface and the outer surface of the waste steel barrel through barrel body shot blasting equipment to realize the stripping of residual substances in the barrel, and then the waste steel barrel after the shot blasting treatment is subjected to cover cutting, plate splitting and flattening to prepare a plate.
7. The method for the innocent treatment of the waste steel barrels according to claim 5 or 6, wherein the method comprises the following steps: a cover is also arranged between the heating and material controlling and the heating and drying, and the barrel body, the barrel bottom and the barrel edge of the waste steel barrel are mutually separated.
8. The method for the innocent treatment of the waste steel barrels according to any one of claims 1 to 6, which is characterized in that: the method also comprises a stripping barrel before heating and controlling the material, and the stacked waste steel barrels are stripped and divided into single steel barrels.
9. The method for the innocent treatment of the waste steel barrels as claimed in claim 8, which is characterized in that: in the heating and drying process, the drying temperature is 100-.
10. The method for the innocent treatment of the waste steel barrels of claim 1, 5 or 6, wherein the method comprises the following steps: in the shot blasting, shot blasting is carried out for 1-10 times, and the single shot blasting time is 10-60 s.
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| CN113231896A (en) * | 2021-05-19 | 2021-08-10 | 佛山市顺创环保科技有限公司 | Old iron drum renovation process |
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| CN114453386A (en) * | 2021-12-28 | 2022-05-10 | 上海丛麟环保科技股份有限公司 | Crushing and granulating method for waste steel barrels |
| CN114515742A (en) * | 2022-01-18 | 2022-05-20 | 珠海市斗门区永兴盛环保工业废弃物回收综合处理有限公司 | Iron drum cleaning and recycling process |
| CN115007934A (en) * | 2022-07-21 | 2022-09-06 | 江苏康斯派尔再生资源有限公司 | Complete equipment for waste steel barrel cover cutting and waste cleaning flow process |
| CN115007934B (en) * | 2022-07-21 | 2023-09-01 | 江苏康斯派尔再生资源有限公司 | Waste steel barrel cover cutting and waste cleaning line production complete equipment |
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