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CN-121988596-A - Waste steel recycling equipment and treatment method

CN121988596ACN 121988596 ACN121988596 ACN 121988596ACN-121988596-A

Abstract

The invention discloses waste steel recovery equipment and a treatment method, wherein the waste steel recovery equipment comprises a crusher, a conveyor belt, a separating tank and a condensing separating tank, a pair of crushing rollers are rotationally connected to the crusher, when the crushing rollers rotate, the waste steel is crushed to form iron sheets, the conveyor belt is arranged at the lower part of the crushing rollers and is used for conveying the iron sheets, a heating rod is arranged in the separating tank and is connected with municipal electricity, the iron sheets enter the separating tank after passing through the conveyor belt, and the iron sheets in the separating tank are heated to 600-800 ℃ by the heating rod so as to analyze paint on the iron sheets. The invention has the beneficial effects that the problems of high labor intensity, low efficiency, easy damage to a matrix and dust pollution of the traditional mechanical paint removing method are solved, and the problems of equipment corrosion, high potential safety hazard, VOCs emission and secondary pollution caused by using a strong corrosive agent in the chemical paint removing method are avoided.

Inventors

  • HOU JIANQIANG

Assignees

  • 石家庄创略废旧物资回收有限公司

Dates

Publication Date
20260508
Application Date
20260320

Claims (10)

  1. 1. Waste steel recovery equipment, characterized by, include: the crushing machine (1), a pair of crushing rollers (11) are connected in a rotating way to the crushing machine (1), and when the crushing rollers (11) rotate, waste steel is crushed to form iron sheets; A conveyor belt (2), the conveyor belt (2) being mounted at the lower part of a pair of crushing rollers (11) for transporting iron pieces; The separation tank (8), a heating rod (81) is arranged in the separation tank (8), the heating rod (81) is connected with municipal electricity, the iron sheet enters the separation tank (8) after passing through the conveyor belt (2), and the heating rod (81) heats the iron sheet in the separation tank (8) to 600-800 ℃ to analyze paint on the iron sheet; the condensing and separating box (5), fixedly connected with fourth body (51) and fifth body (52) on condensing and separating box (5), the one end fixed connection that condensing and separating box (5) was kept away from to fourth body (51) is on knockout drum (8), the one end fixedly connected with gas collection jar (6) that condensing and separating box (5) was kept away from to fifth body (52).
  2. 2. The waste steel recycling device according to claim 1, wherein a plurality of water spraying heads (12) are arranged in the crusher (1), the water spraying heads (12) are all arranged below a pair of crushing rollers (11), when the crushing rollers (11) crush waste steel, cleaning liquid is sprayed out of the water spraying heads (12) to clean the iron sheet, the waste steel recycling device further comprises a water storage tank (13), the water storage tank (13) is arranged below the crusher (1), and the cleaning liquid sprayed out of the water spraying heads (12) flows into the water storage tank (13).
  3. 3. The waste steel recovery device according to claim 2, further comprising a blow-drying mechanism, wherein the blow-drying mechanism comprises a first hopper (3) and an air pump (4), the first hopper (3) is positioned at one end of the conveyor belt (2) far away from the crusher (1), a mesh plate (31) which is obliquely arranged is fixedly connected in the first hopper (3), and a plurality of air injection heads (311) are arranged on the mesh plate (31); The air pump is characterized in that a second pipe body (42) is fixedly connected to the air pump (4), one end, away from the air pump (4), of the second pipe body (42) stretches into the first hopper (3), one end, stretching into the first hopper (3), of the second pipe body (42) is fixedly connected with a third pipe body (43), and the air jet head (311) is fixedly connected to the third pipe body (43).
  4. 4. A waste steel recovery device as claimed in claim 3, wherein an auger (32) is fixedly arranged on the first hopper (3), a heating box (7) is fixedly connected to the outlet end of the auger (32), a heat insulation plate (71) is fixedly connected to the inside of the heating box (7), the heat insulation plate (71) divides the space inside the heating box (7) into a preheating bin (701) and a heating bin (702), and the separation tank (8) is fixedly arranged in the heating bin (702); the preheating bin (701) is internally and fixedly provided with a second hopper (72), a seventh pipe body (721) is integrally formed on the second hopper (72), one end, far away from the heating box (7), of the seventh pipe body (721) is communicated with the separating tank (8), and the seventh pipe body (721) is fixedly provided with an electromagnetic valve (73).
  5. 5. The waste steel recovery device according to claim 4, wherein a plurality of ignition guns (74) are fixedly arranged in the heating bin (702), and a sixth pipe body (61) communicated with the heating bin (702) is fixedly connected to the gas collection tank (6).
  6. 6. A waste steel recycling apparatus according to claim 5, characterized in that the heat insulating plate (71) is fixedly provided with an air valve (711).
  7. 7. The waste steel recovery device according to claim 6, wherein the air pump (4) is fixedly connected with a first pipe body (41) communicated with the preheating bin (701).
  8. 8. Waste steel recovery equipment according to claim 1, characterized in that a shell-and-tube condenser is arranged in the condensation separation tank (5).
  9. 9. The waste steel recovery treatment method is characterized by comprising the following steps of: S1, crushing pretreatment, namely conveying waste steel to be treated into a crusher (1), starting a pair of crushing rollers (11) rotating in opposite directions in the crusher (1), crushing the waste steel into iron sheets with preset sizes through the shearing and extrusion actions of the crushing rollers (11), breaking the continuity of a paint layer on the surface of the steel, and increasing the subsequent heat exchange contact area of the steel; S2, airtight thermal analysis paint removal, namely conveying the iron sheet obtained in the step S1 into an airtight separation tank (8) through a conveying belt (2), starting a heating rod (81) in the separation tank (8), heating the interior of the separation tank (8) to 600-800 ℃, heating the iron sheet at a constant temperature, enabling a thermal cracking reaction of paint organic polymers attached to the surface of the iron sheet to occur, cracking the iron sheet into gaseous hydrocarbon and tar vapor, realizing complete separation of a paint coating and a steel substrate, and avoiding dust overflow in the whole airtight treatment; S3, oil-gas condensation separation, namely introducing high-temperature oil-gas mixture generated in the separation tank (8) into the condensation separation tank (5) through a fourth pipe body (51), cooling through a tube type condenser in the condensation separation tank (5), separating out high-boiling-point tar liquid components, collecting and storing the components, and conveying low-boiling-point non-condensable combustible gas to the gas collection tank (6) through a fifth pipe body (52) for temporary storage for later use, thereby finishing the classified recovery of paint cracking products.
  10. 10. The method for recycling waste steel according to claim 9, wherein a water spray head (12) is arranged below a crushing roller (11) in the crusher (1), the crushing operation synchronously starts the water spray head (12), clean water or cleaning liquid containing surfactant is sprayed to spray crushed iron sheets, dust is inhibited from flying and soluble impurities on the surfaces of the iron sheets are washed, and cleaning waste liquid is collected into a water storage tank (13) through a collecting hopper at the bottom of the crusher (1) and is recycled after precipitation and filtration; Conveying the pre-cleaned iron sheet to a first hopper (3) through a conveyor belt (2), enabling the iron sheet to slide downwards along an inclined mesh plate (31) in the first hopper (3), starting an air pump (4) to generate high-speed air flow, conveying the iron sheet to a jet head (311) through a second pipe body (42) and a third pipe body (43) to jet, and blowing water on the surface of the iron sheet by the high-speed air flow to finish drying treatment and reduce the energy consumption of subsequent thermal analysis; The dried iron sheet is quantitatively conveyed to a second hopper (72) in a preheating bin (701) of a heating box (7) for temporary storage through a packing auger (32), and the intermittent feeding of the iron sheet into a separation tank (8) is realized by controlling an electromagnetic valve (73) on a seventh pipe body (721) to be intermittently opened, and the continuous crushing and drying processes at the upstream and the thermal analysis processes at the downstream are linked, so that the continuous production of the whole flow is realized; The non-condensable combustible gas temporarily stored in the gas collection tank (6) is conveyed to a heating bin (702) of the heating box (7) through a sixth pipe body (61), is ignited and burnt through an ignition gun (74), provides a main heat source for the separation tank (8), reduces the commercial power consumption of a heating rod (81), high-temperature flue gas waste heat in the heating bin (702) is led into the preheating bin (701) through a gas valve (711) on a heat insulation plate (71), the iron sheet to be treated is preheated, waste heat gas after heat exchange is extracted through a first pipe body (41) by an air extracting pump (4), and is used for blowing and drying by a jet head (311), so that the heat energy gradient recycling is realized.

Description

Waste steel recycling equipment and treatment method Technical Field The invention relates to the technical field, in particular to waste steel recovery equipment and a treatment method. Background With the development of the recycling industry of renewable resources, the recycling amount of waste steel is continuously increased. The condition that paint or an anti-corrosion coating is attached to the surface of the waste steel material is very common, such as a waste automobile skin, a waste paint bucket, a coated waste steel plate, a waste steel structure and the like. The waste steel materials need to be paint removed before regeneration so as to ensure the quality of the steel. The traditional paint stripping method mainly comprises stripping the paint layer by mechanical external force and chemically corroding and analyzing the paint layer. Under the mechanical paint removing method, workers need to repeatedly apply external force to remove paint by using tools such as a grinding machine, a scraper and the like, so that the labor intensity is high, the treatment efficiency is low, and the requirement of mass treatment cannot be met. In addition, the instability of mechanical acting force also easily damages the steel substrate, reduces the quality of reclaimed materials, generates a large amount of dust in the treatment process, pollutes the working environment, and leads to the increase of the subsequent treatment cost. The chemical paint stripping method relies on a strong corrosive agent to strip paint, and the method has high treatment speed, but the strong corrosive agent can erode the substrate of steel, so that the corrosion prevention investment and maintenance cost of equipment are high. In addition, many chemical paint removers contain organic solvents, which are not only flammable and explosive, but also can cause excessive discharge of VOCs, thus forming serious threat to the environment and operation safety, and also can cause secondary pollution of soil and water. Therefore, in order to solve the above technical problems, it is necessary to provide a waste steel recovery device and a treatment method. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide waste steel recovery equipment and a treatment method, so as to solve the problems in the prior art. In order to solve the technical problems, the invention adopts the following technical scheme: The invention provides waste steel recovery equipment which comprises a crusher, a conveyor belt, a separating tank and a condensation separating box, wherein a pair of crushing rollers are rotationally connected to the crusher, waste steel is crushed to form iron sheets when the crushing rollers rotate, the conveyor belt is arranged at the lower part of the crushing rollers and used for conveying the iron sheets, a heating rod is arranged in the separating tank and is connected with municipal electricity, the iron sheets enter the separating tank after passing through the conveyor belt, the heating rod heats the iron sheets in the separating tank to 600-800 ℃ to analyze paint on the iron sheets, a fourth pipe body and a fifth pipe body are fixedly connected to the condensation separating box, and one end, far away from the condensation separating box, of the fourth pipe body is fixedly connected to the separating tank, and one end, far away from the condensation separating box, of the fifth pipe body is fixedly connected with a gas collecting tank. In one or more embodiments of the invention, a plurality of water spray heads are arranged in the crusher, the water spray heads are all positioned below a pair of crushing rollers, when the crushing rollers crush waste steel, the water spray heads spray cleaning liquid to clean the iron sheets, the waste steel recycling equipment also comprises a water storage tank, the water storage tank is positioned below the crusher, and the cleaning liquid sprayed by the water spray heads flows into the water storage tank. In one or more embodiments of the present invention, the air blowing device further comprises a blow-drying mechanism, wherein the blow-drying mechanism comprises a first hopper and an air pump, the first hopper is located at one end of the conveyor belt, which is far away from the crusher, an inclined mesh plate is fixedly connected in the first hopper, a plurality of air injection heads are installed on the mesh plate, a second pipe body is fixedly connected on the air pump, one end of the second pipe body, which is far away from the air pump, extends into the first hopper, one end of the second pipe body, which extends into the first hopper, is fixedly connected with a third pipe body, and the air injection heads are fixedly connected on the third pipe body. In one or more embodiments of the invention, an auger is fixedly arranged on the first hopper, a heating box is fixedly connected to the outlet end of the auger, a heat insulation plate is fixedly