Hazardous waste homogenizing and mixing device and method

Abstract

The invention discloses a device and a method for homogenizing and mixing hazardous wastes. The device comprises a bucket elevator, a sealed gas-collecting hood, a double-shaft stirrer, a buffer storage bin and a discharge valve, the sealed gas collecting hood is provided with a lateral feeding hole, a top feeding hole and an annular collecting hole, and a sliding door is arranged at the lateral feeding hole; the bucket elevator comprises a hopper, a hopper sliding rail and a hopper traction mechanism, the side wall of the hopper is assembled with the hopper sliding rail in a sliding mode through a sliding piece, the hopper sliding rail comprises a lifting section and a discharging bent rail section, the discharging bent rail section corresponds to the lateral feeding port in position, and the hopper traction mechanism is connected with the bottom of the hopper. And a poke rod which is poked by the hopper traction mechanism to push the sliding door to be opened is arranged on the sliding door. By adopting the device and the method disclosed by the invention, the bad environmental problems of flying dust and pungent smell escaping during homogenizing and mixing are avoided, meanwhile, the homogenizing degree is improved, and the homogenizing and mixing efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of comprehensive recycling of hazardous wastes, and specifically relates to a device and method for homogenizing and mixing hazardous wastes. Background Art

[0002] With the continuous updating of technology in the hazardous waste recycling and utilization industry, more and more types of hazardous waste can be comprehensively recycled and utilized. Due to the characteristics of hazardous waste such as wide sources, diverse types, complex composition and different forms, various types of hazardous waste need to be homogenized, mixed and matched before comprehensive recycling and utilization in order to meet production technology requirements.

[0003] The current homogenization and mixing method is relatively backward. It uses engineering vehicles to turn the materials many times, which requires a large area of ​​site. When turning and homogenizing the materials, dust is serious and irritating odors escape, resulting in a relatively bad environment. At the same time, the degree of homogenization of the turning of the materials is poor, which is time-consuming and inefficient. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a hazardous waste homogenization and mixing device and method, so as to avoid the adverse environmental problems of dust and irritating odor generated during homogenization and mixing, and at the same time, improve the degree of homogenization and enhance the efficiency of homogenization and mixing.

[0005] The present invention solves the above problems by the following technical means: A hazardous waste homogenizing and mixing device comprises a bucket elevator, a sealed air collecting hood, a double-shaft mixer, a buffer silo and a discharge valve, wherein the sealed air collecting hood is arranged at the feed port of the double-shaft mixer, the buffer silo is arranged at the discharge port of the double-shaft mixer, and the discharge valve is arranged at the discharge port of the buffer silo; the sealed air collecting hood is provided with a side feed port, a top feed port and a ring collecting port, and a sliding door is provided at the side feed port; the bucket elevator comprises a bucket, a bucket slide rail and a bucket traction mechanism, the side wall of the bucket is slidably assembled with the bucket slide rail through a sliding member, the bucket slide rail comprises a lifting segment and a discharge curved rail segment, the discharge curved rail segment corresponds to the position of the side feed port, the bucket traction mechanism is connected to the bottom of the bucket, and the sliding door is provided with a toggle rod which is pushed to open the sliding door by the toggle of the bucket traction mechanism.

[0006] During the above-mentioned hopper lifting process, the hopper traction mechanism first lifts the hopper and moves it along the lifting section. When the hopper moves to the unloading curved track section, one side of the hopper moves along the unloading curved track section, and the bottom of the hopper continues to lift. In this way, the gradual overturning of the hopper can be achieved. During this process, the hopper traction mechanism simultaneously pushes the toggle rod and the sliding door upward to open the side feed port, thereby dumping the material in the hopper into the sealed air collecting hood; after unloading is completed, the hopper traction mechanism drives the hopper to move in the opposite direction, and the sliding door automatically closes under the action of gravity.

[0007] Furthermore, the hopper traction mechanism includes a winch, a steel wire rope and a traction frame, one end of the steel wire rope is wound on the winch, and the other end is connected to the traction frame, and the traction frame is hinged to the bottom of the hopper. In this way, the toggle rod and the sliding door can be pushed to move by the traction frame.

[0008] Furthermore, it also includes an exhaust device connected to the ring collection port. In this way, the generated dust and irritating odor are extracted and processed by the exhaust device, so that a slight negative pressure is generated inside the sealed air collection hood, effectively controlling the escape of irritating odor.

[0009] Furthermore, the part of the twin-shaft mixer in contact with the material is provided with a layer of corrosion-resistant and wear-resistant material.

[0010] Furthermore, the anti-corrosion and wear-resistant material layer is made of wear-resistant cast iron Cr12 and PE.

[0011] Anti-corrosion and wear-resistant materials can prevent the contact surface with materials from corrosion and wear, thus extending its service life.

[0012] Furthermore, the volume of the hopper is greater than 5 cubic meters, and the opening width of the hopper is greater than 2500 mm, so that the material can be fed in one go using an engineering vehicle.

[0013] Furthermore, the volume of the twin-shaft mixer is greater than 9 cubic meters, and the size of the discharge port of the buffer silo is 600mm×1000mm, so as to meet a certain homogenized mixing amount and material buffering amount, and realize continuous production.

[0014] A method for homogenizing and mixing hazardous waste using the above device comprises the following steps: S1: After the liquid hazardous waste and powdered hazardous waste are weighed, they are lifted by the bucket elevator and fed into the twin-shaft mixer through the side feed port of the sealed gas collection hood; S2: After solid hazardous waste and auxiliary materials are measured, they are added into the twin-shaft mixer through the top feed port of the sealed gas collection hood; S3: The hazardous waste added in S1 and S2 is fully mixed and homogenized in a twin-shaft mixer, and after passing the mixing, it is discharged into the buffer silo through the discharge port of the twin-shaft mixer; S4: The material falling into the buffer silo is continuously fed to the next process through the discharge valve.

[0015] The liquid hazardous waste includes organic solvents, waste mineral oil, etc., and the powdered hazardous waste includes fly ash, cigarette ash, etc.

[0016] The solid hazardous waste includes electroplating sludge, incineration residue, distillation residue, etc., and the auxiliary materials include powdered limestone, powdered quartz stone, granular coal, etc.

[0017] The discharge port of the twin-shaft mixer is designed with a hydraulic discharge door, which can realize automatic control.

[0018] The mixing time of the double-shaft mixer can be controlled autonomously depending on the dryness or wetness of the mixed materials.

[0019] Beneficial effects of the present invention: (1) It can realize the homogenization and mixing of various types of hazardous wastes, fundamentally changing the homogenization and mixing operation mode, improving production efficiency, reducing production costs, and achieving considerable economic benefits; (2) The whole set of equipment occupies a small area, saving site resources; (3) The dust and irritating odor generated during the homogenization and mixing process are effectively collected and treated, which greatly improves the working environment and has significant environmental benefits; (4) The homogenization degree is high, the mixing operation time is short, and automatic control can be achieved.

[0020] (5) The sliding door of the sealed air hood opens and closes automatically during the feeding process, ensuring the sealing of the feeding process to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of a bucket elevator. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 to Figure 2 As shown, this embodiment discloses a hazardous waste homogenization and mixing device, including a bucket elevator, a sealed air collecting hood 6, a double-shaft mixer 7, a buffer silo 8 and a discharge valve 9, wherein the sealed air collecting hood is arranged at the feed port of the double-shaft mixer, the buffer silo is arranged at the discharge port of the double-shaft mixer, and the discharge valve is arranged at the discharge port of the buffer silo. In this embodiment, the discharge valve is a rod valve; the sealed air collecting hood is provided with a side feed port 5, a top feed port 10 and a ring collection port 11, A sliding door 13 is provided at the side feed port; the bucket elevator includes a bucket 4, a bucket slide rail and a bucket traction mechanism, the side wall of the bucket is slidably assembled with the bucket slide rail through a sliding member 3, the bucket slide rail includes a lifting segment 1 and a discharge curved rail segment 2, the discharge curved rail segment corresponds to the position of the side feed port, the bucket traction mechanism is connected to the bottom of the bucket, and the sliding door is provided with a toggle rod 12 which is pushed to open the sliding door by the bucket traction mechanism.

[0025] During the above-mentioned hopper lifting process, the hopper traction mechanism first lifts the hopper and moves it along the lifting section. When the hopper moves to the unloading curved track section, one side of the hopper moves along the unloading curved track section, and the bottom of the hopper continues to lift. In this way, the gradual overturning of the hopper can be achieved. During this process, the hopper traction mechanism simultaneously pushes the toggle rod and the sliding door upward to open the side feed port, thereby dumping the material in the hopper into the sealed air collecting hood; after unloading is completed, the hopper traction mechanism drives the hopper to move in the opposite direction, and the sliding door automatically closes under the action of gravity.

[0026] The hopper traction mechanism comprises a winch 16, a steel wire rope 14 and a traction frame 15, one end of the steel wire rope is wound on the winch, and the other end is connected to the traction frame, and the traction frame is hinged to the bottom of the hopper. In this way, the toggle rod and the sliding door can be pushed to move by the traction frame.

[0027] It also includes an exhaust device connected to the ring collection port. In this way, the generated dust and irritating odor are extracted and processed by the exhaust device, so that a slight negative pressure is generated inside the sealed air collection hood, effectively controlling the escape of irritating odor.

[0028] The part of the twin-shaft mixer in contact with the material is provided with an anti-corrosion and wear-resistant material layer.

[0029] The anti-corrosion and wear-resistant material layer is made of wear-resistant cast iron Cr12 and PE.

[0030] Anti-corrosion and wear-resistant materials can prevent the contact surface with materials from corrosion and wear, thus extending its service life.

[0031] The volume of the hopper is greater than 5 cubic meters, and the opening width of the hopper is greater than 2500 mm, so that it is convenient to use an engineering vehicle to feed the material at one time.

[0032] The volume of the twin-shaft mixer is greater than 9 cubic meters, and the size of the discharge port of the buffer silo is 600mm×1000mm, which meets a certain homogenization mixing amount and material buffering amount, and realizes continuous production.

[0033] A method for homogenizing and mixing hazardous waste using the above device comprises the following steps: S1: Liquid hazardous waste and powdered hazardous waste are weighed in a ratio of 1:3, lifted by the bucket elevator hopper, and fed into the twin-shaft mixer through the side feed port of the sealed gas collection hood; S2: After the solid hazardous waste and auxiliary materials are weighed in a ratio of 5.9:0.1, they are added into the twin-shaft mixer through the top feed port of the sealed gas collection hood; S3: The hazardous waste added in S1 and S2 is fully mixed and homogenized in a twin-shaft mixer, and after passing the mixing, it is discharged into the buffer silo through the discharge port of the twin-shaft mixer; S4: The material falling into the buffer silo is continuously fed to the next process through the discharge valve.

[0034] The liquid hazardous waste includes organic solvents, waste mineral oil, etc., and the powdered hazardous waste includes fly ash, cigarette ash, etc.

[0035] The solid hazardous wastes include electroplating sludge, incineration residues, distillation residues, etc., and the auxiliary materials include powdered limestone, powdered quartz stone, granular coal, etc.

[0036] The discharge port of the twin-shaft mixer is designed with a hydraulic discharge door, which can realize automatic control.

[0037] The mixing time of the double-shaft mixer can be controlled autonomously depending on the dryness or wetness of the mixed materials.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A hazardous waste homogenization and mixing device, characterized by: It includes a bucket elevator, a sealed air collecting hood, a double-shaft mixer, a buffer silo and a discharge valve, wherein the sealed air collecting hood is arranged at the feed port of the double-shaft mixer, the buffer silo is arranged at the discharge port of the double-shaft mixer, and the discharge valve is arranged at the discharge port of the buffer silo; the sealed air collecting hood is provided with a side feed port, a top feed port and a ring collecting port, and a sliding door is provided at the side feed port; the bucket elevator includes a hopper, a hopper slide rail and a hopper traction mechanism, the side wall of the hopper is slidably assembled with the hopper slide rail through a sliding part, the hopper slide rail includes a lifting segment and a discharge curved rail segment, the discharge curved rail segment corresponds to the position of the side feed port, the hopper traction mechanism is connected to the bottom of the hopper, and the sliding door is provided with a toggle rod which is pushed to open the sliding door by the hopper traction mechanism.

2. The hazardous waste homogenizing and mixing device according to claim 1, characterized in that: The hopper traction mechanism comprises a winch, a steel wire rope and a traction frame, one end of the steel wire rope is wound on the winch, and the other end is connected to the traction frame, and the traction frame is hinged to the bottom of the hopper.

3. The hazardous waste homogenizing and mixing device according to claim 2, characterized in that: Also included is an exhaust device connected to the ring manifold.

4. The hazardous waste homogenizing and mixing device according to claim 3 is characterized in that: The part of the twin-shaft mixer in contact with the material is provided with an anti-corrosion and wear-resistant material layer.

5. The hazardous waste homogenizing and mixing device according to claim 4, characterized in that: The anti-corrosion and wear-resistant material layer is made of wear-resistant cast iron Cr12 and PE.

6. The hazardous waste homogenizing and mixing device according to claim 5, characterized in that: The volume of the hopper is greater than 5 cubic meters, and the opening width of the hopper is greater than 2500 mm.

7. The hazardous waste homogenizing and mixing device according to claim 6, characterized in that: The volume of the twin-shaft mixer is greater than 9 cubic meters, and the discharge port size of the buffer silo is 600mm×1000mm.

8. A method for homogenizing and mixing hazardous waste using the hazardous waste homogenizing and mixing device as claimed in claim 1, characterized in that: The steps include: S1: After the liquid hazardous waste and powdered hazardous waste are weighed, they are lifted by the bucket elevator and fed into the twin-shaft mixer through the side feed port of the sealed gas collection hood; S2: After solid hazardous waste and auxiliary materials are measured, they are added into the twin-shaft mixer through the top feed port of the sealed gas collection hood; S3: The hazardous waste added in S1 and S2 is fully mixed and homogenized in a twin-shaft mixer, and after passing the mixing, it is discharged into the buffer silo through the discharge port of the twin-shaft mixer; S4: The material falling into the buffer silo is continuously fed to the next process through the discharge valve.

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