CN111185461A - Pulping method of organic dangerous solid waste - Google Patents

Pulping method of organic dangerous solid waste Download PDF

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Publication number
CN111185461A
CN111185461A CN202010010017.0A CN202010010017A CN111185461A CN 111185461 A CN111185461 A CN 111185461A CN 202010010017 A CN202010010017 A CN 202010010017A CN 111185461 A CN111185461 A CN 111185461A
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organic
equipment
solid waste
pulping
solid material
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CN111185461B (en
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刘鹏
陈龑斐
杨华
张强强
王瑞
豆进科
喻学孔
牛玉国
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Jerry Bonda Environmental Technology Co Ltd
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Jerry Bonda Environmental Technology Co Ltd
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    • 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
    • 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
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B2101/00—Type of solid waste
    • B09B2101/02—Gases or liquids enclosed in discarded articles, e.g. aerosol cans or cooling systems of refrigerators

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a pulping method of organic hazardous solid waste, which can prepare the standard-reaching slurry fed by gasification equipment in a high-temperature gasification technology, thereby realizing the purpose of treating the organic hazardous solid waste by utilizing the high-temperature gasification technology and replacing the prior treatment method of the organic hazardous solid waste: incineration, landfill, fermentation, and the like. After the prepared slurry is treated by gasification equipment, the treatment resource and harmlessness of the organic hazardous solid waste can be realized.

Description

Pulping method of organic dangerous solid waste
Technical Field
The invention relates to the technical field of organic hazardous solid waste treatment, in particular to a pulping method of organic hazardous solid waste.
Background
The generation, transfer and treatment of organic dangerous solid wastes not only pollute the environment, but also harm the physical and mental health of people. The organic hazardous solid waste mainly refers to high-calorific-value solid waste such as rectification residue, waste activated carbon, waste resin, chromium-containing leather waste and the like covered by the national hazardous waste records, and solid waste which is considered to have hazardous characteristics through identification. However, a great part of the organic hazardous wastes still have high utilization value, and the comprehensive utilization of the solid wastes can improve the recovery of available energy and obtain economic, environmental and social comprehensive benefits while protecting the environment. At present, the treatment method of organic solid waste mainly comprises incineration, landfill, fermentation and the like, wherein the incineration has high requirement on the heat value of solid waste, the incineration is not thorough due to low heat value or unstable heat value, harmful gases such as dioxin are generated, and the residue after the incineration still belongs to dangerous waste generally and can not achieve the aim of thorough harmless treatment; the fermentation is mainly used for treating solid wastes with low toxicity and high organic matter content, the reaction time is long, the requirement on reaction conditions is high, and the economy is poor. The landfill method is easy to cause secondary pollution to underground water and soil due to large occupied area, and can not realize the reduction, recycling and harmless treatment targets of solid wastes.
The high-temperature gasification technology is a development trend for treating organic dangerous solid wastes, and has good application prospect. By heating the hazardous waste to a temperature above the melting point of the hazardous waste, the combustible components in the solid waste are gasified at high temperature, and the generated gasified gas can be further recycled, so that the resource treatment is realized; the solid waste residue is formed into a molten liquid state, and then is rapidly cooled to form a solid glass body with an amorphous structure, and the solid glass body can be used as a building material, so that harmless treatment is realized.
At present, the method for pulping the organic hazardous solid waste is still lacked in the technology, so that a pulping method of the organic hazardous solid waste is urgently needed, and the development trend of treating the organic hazardous solid waste by using a high-temperature gasification technology is realized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a pulping method of organic dangerous solid waste, which can prepare the standard-reaching slurry fed by gasification equipment in a high-temperature gasification technology, thereby realizing the purpose of treating the organic dangerous solid waste by utilizing the high-temperature gasification technology and replacing the prior treatment method of the organic dangerous solid waste: incineration, landfill, fermentation, and the like. After the prepared slurry is treated by gasification equipment, the treatment resource and harmlessness of the organic hazardous solid waste can be realized.
The aim of the invention is achieved by the following technical measures: a pulping method of organic dangerous solid waste comprises the following steps,
11) detecting and classifying the organic dangerous solid materials;
12) conveying the classified organic dangerous solid materials to drying equipment for drying;
13) conveying the dried organic dangerous solid material to crushing equipment for crushing;
14) treating the organic dangerous solid material by crushing equipment, reducing the particle size and then conveying the organic dangerous solid material to grinding equipment;
15) grinding the organic dangerous solid material by using grinding equipment, and conveying the organic dangerous solid material to screening equipment;
16) after being screened by the screening equipment, the organic dangerous solid material small particles with the mesh number passing through the screening equipment are conveyed into a high-shear tank, and the organic dangerous solid material large particles with the mesh number not passing through the screening equipment are returned to the grinding equipment for circular treatment;
17) adding water into a water storage tank in a high-shear tank to mix with small organic dangerous solid material particles to form a mixture, and adding an organic dangerous waste adjusting material into the high-shear tank through a liquid-phase solid waste storage tank to adjust the heat value of the mixture in the high-shear tank so as to form primary slurry;
18) conveying the primary slurry after the heat value adjustment to a tempering tank;
19) adding an additive into the primary slurry in a tempering tank, and stirring and mixing to form secondary slurry;
20) and detecting the attribute of the secondary slurry.
Further, in the step 1, a heat value detector and a three-phase content detector are used for measuring the heat value and the liquid content of the organic dangerous solid material.
Further, in the step 4, the particle size is reduced to 5-20 mm by crushing equipment and then the particles are conveyed to grinding equipment.
Further, in the step 5, the grinding equipment grinds the particle size of the organic dangerous solid material to 75-200 μm and then conveys the organic dangerous solid material to screening equipment.
Further, in the step 6, a 200-mesh screen is adopted as the screening device.
Further, in the step 7, in the high shear tank, for the organic dangerous solid material with the heat value lower than 2000Kcal/kg, the adjustment of the heat value is carried out through the liquid phase solid waste auxiliary material tank.
Further, the additive in step 9 includes one or a mixture of more of lignosulfonate sodium, naphthalene sulfonate, sulfonated humate, polyolefin, sodium carboxymethylcellulose, polycarboxylic acid, polyacrylamide, alkyl polyoxyethylene ether polyacrylamide and sodium humate.
Further, in the step 10, the viscosity, the calorific value, the sedimentation rate and the pH attribute of the secondary slurry are detected by using a kinematic viscosity meter, a calorific value detector, a sedimentation rate meter and a pH meter, respectively.
Furthermore, the drying equipment, the crushing equipment, the grinding equipment, the screening equipment and the conveying among the drying equipment, the crushing equipment, the grinding equipment and the screening equipment in the steps 2, 3, 4, 5 and 6 adopt sealing measures, and the waste gas and the dust are treated by the VOC treatment device.
Further, VOC processing apparatus includes dust remover, adsorption tower and photocatalytic oxidation equipment, dust remover, adsorption tower and photocatalytic oxidation equipment connect gradually, VOC processing apparatus passes through dust remover and external connection.
Furthermore, the adsorbent in the adsorption tower comprises more than one of activated carbon, ion exchange resin, chitosan substances and humic acid adsorbents.
Further, the activated carbon can be disposed of through the pretreatment device of the organic hazardous solid waste after the adsorption saturation.
Compared with the prior art, the invention has the beneficial effects that: the pulping method of the organic dangerous solid waste can prepare the slurry reaching the standard of the feeding of the gasification equipment in the high-temperature gasification technology, thereby realizing the purpose of treating the organic dangerous solid waste by utilizing the high-temperature gasification technology and replacing the prior treatment method of the organic dangerous solid waste: incineration, landfill, fermentation, and the like. After the prepared slurry is treated by gasification equipment, the treatment resource and harmlessness of the organic hazardous solid waste can be realized. The VOC treatment device can well treat the waste gas and dust of each device in the steps 2, 3, 4, 5 and 6. The activated carbon can be disposed by the pretreatment device of the organic hazardous solid waste after being saturated in adsorption.
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a process flow diagram of a process for pulping organic hazardous solid waste.
The system comprises a drying device 1, a crushing device 2, a grinding device 3, a screening device 4, a high-shear tank 5, a water storage tank 6, a liquid-phase solid waste storage tank 7, a conditioning tank 8, a dosing tank 9 and a VOC treatment device 10.
Detailed Description
As shown in fig. 1, the object of the present invention is achieved by the following technical measures: a pulping method of organic dangerous solid waste comprises the following steps,
1) detecting and classifying the organic dangerous solid materials;
2) conveying the classified organic dangerous solid materials to a drying device 1 for drying; the drying temperature can be adjusted according to different temperatures of the organic dangerous solid materials.
3) The dried organic dangerous solid material can be conveyed to the crushing equipment 2 through a conveyor belt for crushing treatment;
4) the organic dangerous solid materials are treated by the crushing equipment 2, and are conveyed to the grinding equipment 3 after the particle size is reduced;
5) grinding the organic dangerous solid material by using a grinding device 3, and conveying the organic dangerous solid material to a screening device 4;
6) after being screened by the screening device 4, the organic dangerous solid material small particles with the mesh number of 4 passing through the screening device are conveyed into the high-shear tank 5, and the organic dangerous solid material large particles without the mesh number of 4 passing through the screening device are returned to the grinding device 3 for secondary grinding and circular treatment; the particles with proper and uniform particle size are ground to facilitate the later mixing.
7) In the high-shear tank 5, adding water through a water storage tank 6 to mix with small particles of the organic dangerous solid material to form a mixture, and simultaneously adding an organic dangerous waste adjusting material into the high-shear tank 5 through a liquid-phase solid waste storage tank 7 to adjust the heat value of the mixture in the high-shear tank 5 so as to form primary slurry;
8) conveying the primary slurry after the heat value adjustment to a tempering tank 8;
9) adding an additive into the primary slurry through a medicine adding tank 9, and stirring and mixing in a tempering tank 8 to form secondary slurry;
10) and (3) detecting the attributes of the secondary slurry, specifically, detecting the attributes of the secondary slurry such as viscosity, heat value, sedimentation rate, pH and the like by using a kinematic viscosity tester, a heat value detector, a sedimentation rate meter and a pH meter respectively. Through the detection of the properties, the secondary slurry which meets the requirement of the gasification equipment in the high-temperature gasification technology and can be processed is prepared.
In the step 1, a heat value detector and a three-phase content detector are used for measuring the heat value and the liquid content of the organic dangerous solid material.
The drying equipment 1 in the step 2 comprises more than one of a rotary drum kiln, a dry rotary kiln, a vertical preheater, a flap dryer, a rotary drum dryer, a steam dryer, an organic fertilizer dryer, a three-drum dryer, a multi-layer belt dryer, a fluidized bed dryer, a vacuum conduction dryer, an air flow dryer and a spray dryer.
The crushing equipment 2 in the step 3 comprises more than one of a hammer crusher, a double-roller crusher, a jaw crusher, an impact crusher, a multistage vertical sand making machine, a cone crusher, a combined crusher, a box crusher, a double-stage crusher, a sand washer and a stone washer.
In the step 4, the particle size is reduced to 5-20 mm by the crushing equipment 2 and then the particle size is conveyed to the grinding equipment 3. The grinding device 3 comprises more than one of a fly ash ball mill, a vertical mill, a roller ball mill, a tube mill, an air swept coal mill, a wet mill, a high and fine rotor type powder concentrator, a dry ball mill, an overflow ball mill and a rod mill.
In the step 5, the grinding equipment 3 grinds the particle size of the organic dangerous solid material to 75-200 μm and then conveys the organic dangerous solid material to the screening equipment 4. The screening device 4 comprises a drum screen, a circular vibrating screen, a bar screen, a heavy vibrating screen, a roller screen, a probability screen, a cylinder screen and the like.
Grinding equipment 3 grinds the organic dangerous solid materials to particle size of 75-200 μm, and in step 6, screening equipment 4 adopts a 200-mesh screen. The small particles smaller than 75 μm pass through a screen and are conveyed into a high-shear tank 5, and the large particles larger than 75 μm are returned to the grinding device 3 for secondary grinding and recycling treatment.
In the step 7, in the high shear tank 5, the adjustment of the heat value is carried out through the liquid phase solid waste auxiliary tank for the organic dangerous solid material with the heat value lower than 2000 Kcal/kg.
The additive in the step 9 comprises one or a mixture of more of lignosulfonate sodium, naphthalene sulfonate, sulfonated humate, polyolefin, sodium carboxymethylcellulose, polycarboxylic acid, polyacrylamide, alkyl polyoxyethylene ether polyacrylamide and sodium humate.
The drying equipment 1, the crushing equipment 2, the grinding equipment 3, the screening equipment 4 and the conveying among the equipment in the steps 2, 3, 4, 5 and 6 adopt sealing measures to prevent the diffusion of waste gas and dust, and the waste gas and the dust are treated by the VOC treatment device 10.
VOC processing apparatus 10 includes dust remover, adsorption tower and photocatalytic oxidation equipment, dust remover, adsorption tower and photocatalytic oxidation equipment connect gradually, VOC processing apparatus 10 passes through dust remover and external connection. The external connections here refer to connections to the drying apparatus 1, the crushing apparatus 2, the grinding apparatus 3 and the sieving apparatus 4.
The adsorbent in the adsorption tower comprises more than one of active carbon, ion exchange resin, chitosan substances and humic acid adsorbents.
The activated carbon can be disposed by the pretreatment device of the organic hazardous solid waste after being saturated in adsorption.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (12)

1. A pulping method of organic dangerous solid waste is characterized in that: comprises the following steps of (a) carrying out,
1) detecting and classifying the organic dangerous solid materials;
2) conveying the classified organic dangerous solid materials to drying equipment for drying;
3) conveying the dried organic dangerous solid material to crushing equipment for crushing;
4) treating the organic dangerous solid material by crushing equipment, reducing the particle size and then conveying the organic dangerous solid material to grinding equipment;
5) grinding the organic dangerous solid material by using grinding equipment, and conveying the organic dangerous solid material to screening equipment;
6) after being screened by the screening equipment, the organic dangerous solid material small particles with the mesh number passing through the screening equipment are conveyed into a high-shear tank, and the organic dangerous solid material large particles with the mesh number not passing through the screening equipment are returned to the grinding equipment for circular treatment;
7) adding water into a water storage tank in a high-shear tank to mix with small organic dangerous solid material particles to form a mixture, and adding an organic dangerous waste adjusting material into the high-shear tank through a liquid-phase solid waste storage tank to adjust the heat value of the mixture in the high-shear tank so as to form primary slurry;
8) conveying the primary slurry after the heat value adjustment to tempering equipment;
9) in the tempering equipment, adding an additive into the primary slurry, stirring and mixing to form secondary slurry;
10) and detecting the attribute of the secondary slurry.
2. The method for pulping organic hazardous solid waste according to claim 1, characterized in that: in the step 1, a heat value detector and a three-phase content detector are used for measuring the heat value and the liquid content of the organic dangerous solid material.
3. The method for pulping organic hazardous solid waste according to claim 1, characterized in that: and in the step 4, the particle size is reduced to 5-20 mm by crushing equipment and then the particles are conveyed to grinding equipment.
4. The method for pulping organic hazardous solid waste according to claim 1, characterized in that: in the step 5, the grinding equipment grinds the particle size of the organic dangerous solid material to 75-200 mu m and then conveys the organic dangerous solid material to screening equipment.
5. The method for pulping organic hazardous solid waste according to claim 1, characterized in that: in the step 6, the screening equipment adopts a 200-mesh screen.
6. The method for pulping organic hazardous solid waste according to claim 1, characterized in that: in the step 7, the adjustment of the heat value is carried out by a liquid-phase solid waste auxiliary material tank on the organic dangerous solid material with the heat value lower than 2000Kcal/kg in the high-shear tank.
7. The method for pulping organic hazardous solid waste according to claim 1, characterized in that: the additive in the step 9 comprises one or a mixture of more of lignosulfonate sodium, naphthalene sulfonate, sulfonated humate, polyolefin, sodium carboxymethylcellulose, polycarboxylic acid, polyacrylamide, alkyl polyoxyethylene ether polyacrylamide and sodium humate.
8. The method for pulping organic hazardous solid waste according to claim 1, characterized in that: in the step 10, the kinematic viscosity measuring instrument, the calorific value detector, the sedimentation rate instrument and the pH meter are respectively used for detecting the viscosity, the calorific value, the sedimentation rate and the pH attribute of the secondary slurry.
9. The method for pulping organic hazardous solid waste according to claim 1, characterized in that: in step 2, step 3, step 4, step 5 and step 6, the drying equipment, the crushing equipment, the grinding equipment, the screening equipment and the conveying among the above equipment adopt sealing measures, and the treatment of waste gas and dust is carried out by the VOC treatment device.
10. The method for pulping organic hazardous solid waste according to claim 9, characterized in that: VOC processing apparatus includes dust remover, adsorption tower and photocatalytic oxidation equipment, dust remover, adsorption tower and photocatalytic oxidation equipment connect gradually, VOC processing apparatus passes through dust remover and external connection.
11. The apparatus for pretreating organic hazardous solid waste according to claim 10, wherein: the adsorbent in the adsorption tower comprises more than one of active carbon, ion exchange resin, chitosan substances and humic acid adsorbents.
12. The apparatus for pretreating organic hazardous solid waste according to claim 9, wherein: the activated carbon can be disposed by the pretreatment device of the organic hazardous solid waste after being saturated in adsorption.
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