CN105880264B - RDF (resource description framework) system and method for domestic garbage squeezing, classification, quality-based treatment and resource utilization - Google Patents
RDF (resource description framework) system and method for domestic garbage squeezing, classification, quality-based treatment and resource utilization Download PDFInfo
- Publication number
- CN105880264B CN105880264B CN201610416641.4A CN201610416641A CN105880264B CN 105880264 B CN105880264 B CN 105880264B CN 201610416641 A CN201610416641 A CN 201610416641A CN 105880264 B CN105880264 B CN 105880264B
- Authority
- CN
- China
- Prior art keywords
- biogas
- garbage
- rdf
- treatment
- anaerobic fermentation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 64
- 239000012535 impurity Substances 0.000 claims abstract description 88
- 239000000463 material Substances 0.000 claims abstract description 39
- 238000012216 screening Methods 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000006148 magnetic separator Substances 0.000 claims abstract description 11
- 150000002739 metals Chemical class 0.000 claims abstract description 10
- 238000000855 fermentation Methods 0.000 claims description 54
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 38
- 238000000926 separation method Methods 0.000 claims description 38
- 238000003860 storage Methods 0.000 claims description 38
- 239000002002 slurry Substances 0.000 claims description 33
- 238000010248 power generation Methods 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 26
- 230000018044 dehydration Effects 0.000 claims description 21
- 238000006297 dehydration reaction Methods 0.000 claims description 21
- 230000020477 pH reduction Effects 0.000 claims description 21
- 239000007789 gas Substances 0.000 claims description 19
- 238000007885 magnetic separation Methods 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 230000007062 hydrolysis Effects 0.000 claims description 18
- 238000006460 hydrolysis reaction Methods 0.000 claims description 18
- 238000000746 purification Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000000446 fuel Substances 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000003895 organic fertilizer Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000006477 desulfuration reaction Methods 0.000 claims description 7
- 230000023556 desulfurization Effects 0.000 claims description 7
- 230000001079 digestive effect Effects 0.000 claims description 7
- 235000011389 fruit/vegetable juice Nutrition 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 7
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 6
- 239000011449 brick Substances 0.000 claims description 6
- 230000029087 digestion Effects 0.000 claims description 6
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 6
- 230000003301 hydrolyzing effect Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000006855 networking Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000004056 waste incineration Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000010791 domestic waste Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003473 refuse derived fuel Substances 0.000 description 1
Images
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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a household garbage squeezing classification quality-classification treatment resource-oriented framework (RDF) system and a method, wherein the RDF method for household garbage squeezing classification quality-classification treatment resource-oriented framework (RDF) comprises the following steps: (1) crushing; (2) squeezing; (3) dry basis treatment; (4) wet base treatment; conveying the dry base obtained in the step (3) and the light impurities obtained in the step (4) to a toothed roller type crushing device for crushing and loosening treatment, wherein the tooth gap of the toothed roller type crushing device is 60-90 mm; conveying the loosened materials to a screening device to remove inorganic impurities, uniformly removing magnetic metals from materials with oversize materials larger than 50mm by a material homogenizing device through a magnetic separator, removing non-magnetic metals by an eddy current magnetic separator and removing high-density materials by a winnowing machine; the discharge of the winnowing machine is the raw material of RDF, and the raw material is crushed into a specific particle size by a crusher to obtain a final RDF product.
Description
Technical Field
The invention relates to a household garbage treatment technology, in particular to a recycling treatment method for household garbage.
Background
Coal and oil, which are important energy sources for production and life of the modern society, have become dependent on coal and oil, which are both non-renewable energy sources. With the development of society, the urbanization process is accelerated, the urban population is increased, the living standard of people is improved, the yield of urban domestic garbage is continuously increased, the components of the domestic garbage are increasingly complex, the pollution to the environment and the harm to the health of people are increasingly serious, and the development of cities is also limited.
The direct incineration of the household garbage can discharge a large amount of polluted gas to aggravate the harm to the environment. At present, people mostly rely on thermal power generation for daily life electricity, and the consumption of energy is self-evident. In order to solve the energy problem, the Refuse Derived Fuel (RDF) prepared from domestic Refuse has the advantages of high heat value, stable combustion, easy transportation, easy storage, low secondary pollution, low discharge of dioxin substances and the like.
However, most of the existing technical methods for preparing RDF from domestic garbage are used for performing diversified classification on the domestic garbage through mechanical crushing, physical screening, aerobic drying and the like, and RDF is obtained by adding combustion improver and the like, so that the process is complicated, and a workshop occupies a large area. The invention discloses a high-grade RDF fuel system and equipment with high efficiency and simple process and low fly ash.
The technology does not need to classify the domestic garbage in a diversified way, and does not need aerobic drying and addition of a combustion improver.
Disclosure of Invention
The invention aims to solve the technical problem of providing a household garbage squeezing classification quality-grading treatment resource utilization RDF system and a household garbage squeezing classification quality-grading treatment resource utilization RDF method, which are a high-grade RDF fuel system and equipment for preparing clean and low fly ash through household garbage. The method solves the problems of high fly ash yield and high fly ash treatment cost in conventional waste incineration treatment, and the RDF obtained by the technology has high heat value and generates less fly ash after incineration. Therefore, the domestic waste incineration power generation treatment is more environment-friendly and economical, and the RDF can replace other biomass fuels and can be used as fuels of boilers, cement kilns and the like.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the RDF method for the domestic garbage squeezing, classification, quality-based treatment and resource utilization is characterized by comprising the following steps:
(1) crushing; crushing the household garbage to the particle size of less than or equal to 200 mm;
(2) squeezing; conveying the crushed garbage to a squeezing device for squeezing and separating into a dry base and a wet base;
(3) dry basis treatment; carrying out incineration power generation process on the squeezed dry base;
(4) wet base treatment; sequentially sending the squeezed wet base into a light impurity separation device and a heavy impurity separation device for separating and removing light impurities and heavy impurities in the wet base; carrying out incineration power generation process on the separated light impurities; burying the separated heavy impurities or making bricks; the wet base slurry with the light impurities and the heavy impurities separated out is subjected to anaerobic fermentation to produce biogas;
conveying the dry base obtained in the step (3) and the light impurities obtained in the step (4) to a toothed roller type crushing device for crushing and loosening treatment, wherein the tooth gap of the toothed roller type crushing device is 60-90 mm; conveying the loosened materials to a screening device to remove inorganic impurities, uniformly removing magnetic metals from materials with oversize materials larger than 50mm by a material homogenizing device through a magnetic separator, removing non-magnetic metals by an eddy current magnetic separator and removing high-density materials by a winnowing machine; the discharge of the winnowing machine is the raw material of RDF, and the raw material is crushed into a specific particle size by a crusher to obtain a final RDF product.
As a preferred embodiment of the RDF method for the domestic garbage squeezing, classification, quality-based treatment and resource utilization, the method comprises the following steps: in the process of removing inorganic impurities by using a screening device in the incineration power generation technology, the inorganic impurities are small particles which contain sandy soil and glass and have the particle size of less than 50 mm.
As a preferred embodiment of the RDF method for the domestic garbage squeezing, classification, quality-based treatment and resource utilization, the method comprises the following steps: in the incineration power generation process, materials with undersize of less than 50mm of the screening device and heavy material discharged by the separator are incinerated or buried; and a light material outlet of the winnowing machine is the raw material of the RDF.
As a preferred embodiment of the RDF method for the domestic garbage squeezing, classification, quality-based treatment and resource utilization, the method comprises the following steps: the anaerobic fermentation biogas production process comprises the following steps:
s5: hydrolyzing and acidifying; sending the wet base slurry with the light impurities and the heavy impurities separated out into a hydrolysis acidification tank for acidification and hydrolysis;
s6: anaerobic fermentation; the slurry after hydrolytic acidification is sent to an anaerobic fermentation tank for anaerobic fermentation through a pumping device;
s7: anaerobic fermentation biogas treatment; conveying biogas generated by anaerobic fermentation to a biological desulfurization device through a pipeline to remove hydrogen sulfide; conveying the methane from which the hydrogen sulfide is removed to a gas storage cabinet through a pipeline for temporary storage; the gas storage cabinet is connected with a torch in parallel, and incineration treatment of redundant biogas is carried out; the gas storage cabinet is connected in parallel with the other path and is conveyed to the methane utilization device.
As a preferred embodiment of the RDF method for the domestic garbage squeezing, classification, quality-based treatment and resource utilization, the method comprises the following steps: the biogas utilization device of the step S7 comprises a biogas purification device for purifying biogas and then performing biogas power generation networking and a biogas purification device for purifying biogas to prepare CNG for automobile fuel or merging the CNG into a natural gas pipe network.
As a preferred embodiment of the RDF method for the domestic garbage squeezing, classification, quality-based treatment and resource utilization, the method comprises the following steps: a step S6 of treating the digestion solution by anaerobic fermentation; the anaerobic fermentation digestive juice treatment process comprises the following steps:
s10: adding the digestion solution after anaerobic fermentation into the pretreatment blending solution, and then sending the mixture to a dehydration device for dehydration to obtain biogas residues and biogas slurry;
s20: sending the biogas residue obtained by dehydration to an organic fertilizer device to generate an organic fertilizer; and (4) sending the biogas slurry obtained by dehydration to a sewage treatment plant for treatment to realize standard discharge and blending liquid recycling.
As a preferred embodiment of the RDF method for the domestic garbage squeezing, classification, quality-based treatment and resource utilization, the method comprises the following steps: the step (4) also comprises a step of adding a blending liquid into the light impurity treatment device, and the solid content of the wet base slurry treated by the light impurity treatment device and the heavy impurity treatment device is controlled to be 10-35%; the heavy impurities comprise gravel; the storage capacity of the hydrolysis acidification tank is 3-5 days of slurry volume; the hydrolysis acidification tank is internally provided with a stirring and bottom sand scraping device, and bottom gravel is conveyed to a rotational flow sand removal and sand-water separation device at the top of the hydrolysis acidification tank through a pump to remove heavy substances of the gravel; the volume of the anaerobic fermentation tank is the slurry volume with the storage capacity of 20-30 days, and a stirring and bottom sand discharging device is arranged in the anaerobic fermentation tank; the step (1) is also preceded by a step of collecting garbage and a step of transferring the garbage by a garbage crane; the step of collecting the garbage is that the household garbage is transported to a treatment plant in a centralized way by a collecting and transporting vehicle, and the collecting and transporting vehicle unloads the garbage into a garbage storage bin; the step of garbage hanging and transferring is to grab and convey the household garbage in the garbage storage bin to the next process through a garbage hanging hydraulic grab bucket device of the garbage hanging.
As a preferred embodiment of the RDF method for the domestic garbage squeezing, classification, quality-based treatment and resource utilization, the method comprises the following steps: the step (1) is also preceded by a pre-sorting step for sorting out bulk impurities, wherein the pre-sorting step is manual sorting, or a controllable mechanical arm is arranged on a sorting line, or a garbage hanging hydraulic grab bucket is used for separation in a garbage pit;
a step of magnetic separation is also included between the step (1) and the step (3); the step of magnetic separation is to remove magnetic materials in the household garbage through a magnetic separation device; the magnetic separation device is an iron remover; the iron remover is a permanent magnet self-unloading iron remover.
The invention also discloses a household garbage squeezing classification quality-grading treatment resource utilization RDF system which comprises a garbage storage pit, a garbage hanger, a pre-sorting device, a crushing device, a magnetic separation device, a squeezing device, a light impurity separation device and a heavy impurity separation device which are arranged in sequence and work by adopting the method;
a slurry outlet of the heavy impurity separation device is connected to an anaerobic fermentation biogas production system, and a gravel outlet of the heavy impurity separation device is connected to a landfill or brick making system through a conveying belt; the dry base outlet of the squeezing device and the light impurity outlet of the light impurity separation device are connected to an incineration power generation system through a conveying belt;
the incineration power generation comprises a crushing device and a screening device which are arranged in sequence; an oversize outlet of the screening device is connected with the homogenizing device, the magnetic separation device, the eddy current separation device and the air separation device in sequence; the light material outlet of the winnowing device is connected with the crushing mechanism; the heavy material outlet of the winnowing device and the undersize outlet of the screening device are connected to an incineration or landfill system.
Further, the method comprises the following steps: the anaerobic fermentation biogas production system comprises a hydrolysis acidification tank, an anaerobic fermentation tank, a biological desulphurization device and a gas storage cabinet which are arranged in sequence; the gas storage cabinet is connected with a biogas torch in parallel; the other path of the parallel gas storage cabinet is connected with a methane purification device and a methane purification device; the biogas outlet of the anaerobic fermentation tank is connected with the biological desulfurization device; a digestive juice outlet of the anaerobic fermentation tank is connected with a dehydration device; a biogas slurry outlet of the dehydration device is connected with a sewage treatment plant, and a biogas residue outlet of the dehydration device is connected with an organic fertilizer device; a wet base outlet of the squeezing device is connected to the light impurity separation device; the biogas purification device is connected with a biogas power generation device; the biogas purification device is connected with a natural gas pipe network.
The invention has the beneficial effects that:
the invention discloses a high-grade RDF fuel system and a high-grade RDF fuel method with high efficiency and simple process and low fly ash. The technology does not need to classify the domestic garbage in a diversified way, and does not need aerobic drying and addition of a combustion improver. The method solves the problems of high fly ash yield and high fly ash treatment cost in conventional waste incineration treatment, and the RDF obtained by the technology has high heat value and generates less fly ash after incineration. Therefore, the domestic waste incineration power generation treatment is more environment-friendly and economical, and the RDF can replace other biomass fuels and can be used as fuels of boilers, cement kilns and the like.
Drawings
Fig. 1 is a schematic block diagram of a system architecture according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings and examples:
as shown in the drawing, the concrete implementation mode of the invention is shown, and the RDF method for the domestic garbage squeezing, classification, quality-based treatment and resource utilization is disclosed by the invention and is characterized by comprising the following steps:
(1) crushing; crushing the household garbage to the particle size of less than or equal to 200 mm;
(2) squeezing; conveying the crushed garbage to a squeezing device for squeezing and separating into a dry base and a wet base;
(3) dry basis treatment; carrying out incineration power generation process on the squeezed dry base;
(4) wet base treatment; sequentially sending the squeezed wet base into a light impurity separation device and a heavy impurity separation device for separating and removing light impurities and heavy impurities in the wet base; carrying out incineration power generation process on the separated light impurities; burying the separated heavy impurities or making bricks; the wet base slurry with the light impurities and the heavy impurities separated out is subjected to anaerobic fermentation to produce biogas;
conveying the dry base obtained in the step (3) and the light impurities obtained in the step (4) to a toothed roller type crushing device for crushing and loosening treatment, wherein the tooth gap of the toothed roller type crushing device is 60-90 mm; conveying the loosened materials to a screening device to remove inorganic impurities, uniformly removing magnetic metals from materials with oversize materials larger than 50mm by a material homogenizing device through a magnetic separator, removing non-magnetic metals by an eddy current magnetic separator and removing high-density materials by a winnowing machine; the discharge of the winnowing machine is the raw material of RDF, and the raw material is crushed into a specific particle size by a crusher to obtain a final RDF product.
Preferably: in the process of removing inorganic impurities by using a screening device in the incineration power generation technology, the inorganic impurities are small particles which contain sandy soil and glass and have the particle size of less than 50 mm.
Preferably: in the incineration power generation process, materials with undersize of less than 50mm of the screening device and heavy material discharged by the separator are incinerated or buried; and a light material outlet of the winnowing machine is the raw material of the RDF.
Preferably: the anaerobic fermentation biogas production process comprises the following steps:
s5: hydrolyzing and acidifying; sending the wet base slurry with the light impurities and the heavy impurities separated out into a hydrolysis acidification tank for acidification and hydrolysis;
s6: anaerobic fermentation; the slurry after hydrolytic acidification is sent to an anaerobic fermentation tank for anaerobic fermentation through a pumping device;
s7: anaerobic fermentation biogas treatment; conveying biogas generated by anaerobic fermentation to a biological desulfurization device through a pipeline to remove hydrogen sulfide; conveying the methane from which the hydrogen sulfide is removed to a gas storage cabinet through a pipeline for temporary storage; the gas storage cabinet is connected with a torch in parallel, and incineration treatment of redundant biogas is carried out; the gas storage cabinet is connected in parallel with the other path and is conveyed to the methane utilization device. In the embodiment, the anaerobic fermentation biogas production process is added, so that the whole domestic garbage is treated more thoroughly after being squeezed and classified; the domestic garbage is fully and reasonably recycled.
Preferably: the biogas utilization device of the step S7 comprises a biogas purification device for purifying biogas and then performing biogas power generation networking and a biogas purification device for purifying biogas to prepare CNG for automobile fuel or merging the CNG into a natural gas pipe network. The embodiment makes full and environmental-friendly deep utilization of the biogas.
Preferably: a step S6 of treating the digestion solution by anaerobic fermentation; the anaerobic fermentation digestive juice treatment process comprises the following steps:
s10: adding the digestion solution after anaerobic fermentation into the pretreatment blending solution, and then sending the mixture to a dehydration device for dehydration to obtain biogas residues and biogas slurry;
s20: sending the biogas residue obtained by dehydration to an organic fertilizer device to generate an organic fertilizer; and (4) sending the biogas slurry obtained by dehydration to a sewage treatment plant for treatment to realize standard discharge and blending liquid recycling. The embodiment makes full and environmental-friendly deep utilization of the digestive juice after anaerobic fermentation.
Preferably: the step (4) also comprises a step of adding a blending liquid into the light impurity treatment device, and the solid content of the wet base slurry treated by the light impurity treatment device and the heavy impurity treatment device is controlled to be 10-35%; the heavy impurities comprise gravel; the embodiment enables the treatment and subsequent processes of the light impurity treatment device to be carried out smoothly; the slurry is purified, and the method is more suitable for the subsequent methane production process. The storage capacity of the hydrolysis acidification tank is 3-5 days of slurry volume; the hydrolysis acidification tank is internally provided with a stirring and bottom sand scraping device, and bottom gravel is conveyed to a rotational flow sand removal and sand-water separation device at the top of the hydrolysis acidification tank through a pump to remove heavy substances of the gravel; the volume of the anaerobic fermentation tank is the slurry volume with the storage capacity of 20-30 days, and a stirring and bottom sand discharging device is arranged in the anaerobic fermentation tank; the present embodiment defines the volume in days, which is mainly the efficiency of refuse collection and the efficiency of transport at the execution site according to the technical solution; the execution of a specific scheme can be reasonably guided; the application range is wide. The step (1) is also preceded by a step of collecting garbage and a step of transferring the garbage by a garbage crane; the step of collecting the garbage is that the household garbage is transported to a treatment plant in a centralized way by a collecting and transporting vehicle, and the collecting and transporting vehicle unloads the garbage into a garbage storage bin; the step of garbage hanging and transferring is to grab and convey the household garbage in the garbage storage bin to the next process through a garbage hanging hydraulic grab bucket device of the garbage hanging. The transport structure of the present embodiment enables continuous collection and transport; the hydraulic grab bucket device for the garbage truck also has the function of picking out large impurities for preventing blockage.
Preferably: the step (1) is also preceded by a pre-sorting step for sorting out bulk impurities, wherein the pre-sorting step is manual sorting, or a controllable mechanical arm is arranged on a sorting line, or a garbage hanging hydraulic grab bucket is used for separation in a garbage pit;
a step of magnetic separation is also included between the step (1) and the step (3); the step of magnetic separation is to remove magnetic materials in the household garbage through a magnetic separation device; the magnetic separation device is an iron remover; the iron remover is a permanent magnet self-unloading iron remover. The magnetic separation step disclosed in this embodiment can achieve the dual functions of metal recovery and preventing metal from causing subsequent process plugging.
The above-mentioned embodiment uses fig. 1 as the working principle, and its technical process is shown in the figure, the domestic garbage such as residential area is transferred to the technical treatment plant by the garbage collecting and transporting vehicle, the garbage is unloaded into a large storage pit, and the garbage hoisting hydraulic grab bucket device is used to feed the pre-sorting device.
The purpose of the pre-sorting of the present invention is to separate those large pieces of impurities that may clog the equipment. Typical pre-sorting is manual sorting or installation of a controllable robot in the sorting line. In addition, there is a way to separate bulk impurities by using a hydraulic grab of a refuse dump in the refuse pit.
As shown in the figure, the garbage is conveyed to a crushing device by a conveyor after being pre-sorted, and the household garbage is crushed to be less than or equal to 200 mm. And recycling the crushed garbage by the magnetic separator.
As shown, the de-ironed waste is conveyed to a pressing apparatus, which presses the waste into a wet basis and a dry basis.
In the invention, the wet gene has part of flexible impurities such as plastic bags and the like and some heavy density impurities such as gravel and the like which are mixed in the extrusion process, and the light substance separation device and the heavy substance separation device are adopted to separate and remove the impurities, so that the purity of wet base slurry is improved, and the slurry capable of efficiently producing biogas through anaerobic fermentation is obtained.
In the invention, the dry base is conveyed to a toothed bar type crushing device for crushing and loosening treatment, and the gap between teeth is 60-90 mm. Conveying the loosened dry base to a screening device to remove inorganic impurities, such as small particles with the particle size of less than 50mm, such as sandy soil, glass and the like. The materials with oversize materials larger than 50mm are uniformly passed through a magnetic separator (for removing magnetic metals), an eddy current magnetic separator (for removing non-magnetic metals) and a winnowing machine (for removing high-density materials) by a material homogenizing device.
As shown in the figure, the discharge of the winnowing machine is the raw material of the RDF, and the raw material is crushed into a specific particle size by a crusher to form the final RDF product.
The invention also discloses a household garbage squeezing classification quality-grading treatment resource utilization RDF system which comprises a garbage storage pit, a garbage hanger, a pre-sorting device, a crushing device, a magnetic separation device, a squeezing device, a light impurity separation device and a heavy impurity separation device which are arranged in sequence and work by adopting the method;
a slurry outlet of the heavy impurity separation device is connected to an anaerobic fermentation biogas production system, and a gravel outlet of the heavy impurity separation device is connected to a landfill or brick making system through a conveying belt; the dry base outlet of the squeezing device and the light impurity outlet of the light impurity separation device are connected to an incineration power generation system through a conveying belt;
the incineration power generation comprises a crushing device and a screening device which are arranged in sequence; an oversize outlet of the screening device is connected with the homogenizing device, the magnetic separation device, the eddy current separation device and the air separation device in sequence; the light material outlet of the winnowing device is connected with the crushing mechanism; the heavy material outlet of the winnowing device and the undersize outlet of the screening device are connected to an incineration or landfill system.
Further, the method comprises the following steps: the anaerobic fermentation biogas production system comprises a hydrolysis acidification tank, an anaerobic fermentation tank, a biological desulphurization device and a gas storage cabinet which are arranged in sequence; the gas storage cabinet is connected with a biogas torch in parallel; the other path of the parallel gas storage cabinet is connected with a methane purification device and a methane purification device; the biogas outlet of the anaerobic fermentation tank is connected with the biological desulfurization device; a digestive juice outlet of the anaerobic fermentation tank is connected with a dehydration device; a biogas slurry outlet of the dehydration device is connected with a sewage treatment plant, and a biogas residue outlet of the dehydration device is connected with an organic fertilizer device; a wet base outlet of the squeezing device is connected to the light impurity separation device; the biogas purification device is connected with a biogas power generation device; the biogas purification device is connected with a natural gas pipe network.
While the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and various changes, which relate to the related art known to those skilled in the art and fall within the scope of the present invention, can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (6)
1. The RDF method for the domestic garbage squeezing, classification, quality-based treatment and resource utilization is characterized by comprising the following steps:
(1) crushing; crushing the household garbage to the particle size of less than or equal to 200 mm;
(2) squeezing; conveying the crushed garbage to a squeezing device for squeezing and separating into a dry base and a wet base;
(3) dry basis treatment; carrying out incineration power generation process on the squeezed dry base;
(4) wet base treatment; sequentially sending the squeezed wet base into a light impurity separation device and a heavy impurity separation device for separating and removing light impurities and heavy impurities in the wet base; carrying out incineration power generation process on the separated light impurities; burying the separated heavy impurities or making bricks; the wet base slurry with the light impurities and the heavy impurities separated out is subjected to anaerobic fermentation to produce biogas;
conveying the dry base in the step (3) and the light impurities in the step (4) to a toothed roller type crushing device for crushing and loosening treatment, wherein the tooth gap of the toothed roller type crushing device is 60-90 mm; conveying the loosened materials to a screening device to remove inorganic impurities, uniformly removing magnetic metals from materials with oversize materials larger than 50mm by a material homogenizing device through a magnetic separator, removing non-magnetic metals by an eddy current magnetic separator and removing high-density materials by a winnowing machine; the discharge of the winnowing machine is the raw material of RDF, and the raw material is crushed into a specific particle size by a crusher to obtain a final RDF product;
the anaerobic fermentation biogas production process comprises the following steps:
s5: hydrolyzing and acidifying; sending the wet base slurry with the light impurities and the heavy impurities separated out into a hydrolysis acidification tank for acidification and hydrolysis;
s6: anaerobic fermentation; the slurry after hydrolytic acidification is sent to an anaerobic fermentation tank for anaerobic fermentation through a pumping device;
s7: anaerobic fermentation biogas treatment; conveying biogas generated by anaerobic fermentation to a biological desulfurization device through a pipeline to remove hydrogen sulfide; conveying the methane from which the hydrogen sulfide is removed to a gas storage cabinet through a pipeline for temporary storage; the gas storage cabinet is connected with a torch in parallel, and incineration treatment of redundant biogas is carried out; the gas storage cabinet is connected in parallel with the other path and is conveyed to a methane utilization device;
the biogas utilization device of the step S7 comprises a biogas purification device for purifying biogas and then performing biogas power generation networking and a biogas purification device for purifying biogas to prepare CNG for automobile fuel or merging the CNG into a natural gas pipe network;
a step S6 of treating the digestion solution by anaerobic fermentation; the anaerobic fermentation digestive juice treatment process comprises the following steps:
s10: adding the digestion solution after anaerobic fermentation into the pretreatment blending solution, and then sending the mixture to a dehydration device for dehydration to obtain biogas residues and biogas slurry;
s20: sending the biogas residue obtained by dehydration to an organic fertilizer device to generate an organic fertilizer; the biogas slurry obtained by dehydration is sent to a sewage treatment plant for treatment to realize standard discharge and blending liquid recycling;
the step (4) also comprises a step of adding a blending liquid into the light impurity treatment device, and the solid content of the wet base slurry treated by the light impurity treatment device and the heavy impurity treatment device is controlled to be 10-35%; the heavy impurities comprise gravel; the storage capacity of the hydrolysis acidification tank is 3-5 days of slurry volume; the hydrolysis acidification tank is internally provided with a stirring and bottom sand scraping device, and bottom gravel is conveyed to a rotational flow sand removal and sand-water separation device at the top of the hydrolysis acidification tank through a pump to remove heavy substances of the gravel; the volume of the anaerobic fermentation tank is the slurry volume with the storage capacity of 20-30 days, and a stirring and bottom sand discharging device is arranged in the anaerobic fermentation tank; the step (1) is also preceded by a step of collecting garbage and a step of transferring the garbage by a garbage crane; the step of collecting the garbage is that the household garbage is transported to a treatment plant in a centralized way by a collecting and transporting vehicle, and the collecting and transporting vehicle unloads the garbage into a garbage storage bin; the step of garbage hanging and transferring is to grab and convey the household garbage in the garbage storage bin to the next process through a garbage hanging hydraulic grab bucket device of the garbage hanging.
2. The RDF method for the squeezing, classifying, quality-grading, processing and resource utilization of the household garbage as claimed in claim 1, wherein the RDF method comprises the following steps: in the process of removing inorganic impurities by using a screening device in the incineration power generation technology, the inorganic impurities are small particles which contain sandy soil and glass and have the particle size of less than 50 mm.
3. The RDF method for the squeezing, classifying, quality-grading, processing and resource utilization of the household garbage as claimed in claim 1, wherein the RDF method comprises the following steps: in the incineration power generation process, materials with undersize of less than 50mm of the screening device and heavy material discharged by the separator are incinerated or buried; and a light material outlet of the winnowing machine is the raw material of the RDF.
4. The RDF method for squeezing, classifying and recycling household garbage according to claim 1, wherein the step (1) is preceded by a pre-sorting step for sorting out bulk impurities, and the pre-sorting step is manual sorting, or a controllable mechanical arm is arranged on a sorting line, or a garbage hanging hydraulic grab bucket is used for separation in a garbage pit;
a step of magnetic separation is also included between the step (1) and the step (3); the step of magnetic separation is to remove magnetic materials in the household garbage through a magnetic separation device; the magnetic separation device is an iron remover; the iron remover is a permanent magnet self-unloading iron remover.
5. The RDF system for domestic garbage squeezing, classification, quality-grading, treatment and resource utilization is characterized by comprising a garbage storage pit, a garbage crane, a pre-sorting device, a crushing device, a magnetic separation device, a squeezing device, a light impurity separation device and a heavy impurity separation device which are arranged in sequence and work by adopting the method of any one of claims 1 to 4;
a slurry outlet of the heavy impurity separation device is connected to an anaerobic fermentation biogas production system, and a gravel outlet of the heavy impurity separation device is connected to a landfill or brick making system through a conveying belt; the dry base outlet of the squeezing device and the light impurity outlet of the light impurity separation device are connected to an incineration power generation system through a conveying belt;
the incineration power generation system comprises a crushing device and a screening device which are arranged in sequence; an oversize outlet of the screening device is connected with the homogenizing device, the magnetic separation device, the eddy current separation device and the air separation device in sequence; the light material outlet of the winnowing device is connected with the crushing mechanism; the heavy material outlet of the winnowing device and the undersize outlet of the screening device are connected to an incineration or landfill system.
6. The RDF system for squeezing, classifying, treating and recycling the household garbage according to claim 5, wherein the anaerobic fermentation biogas production system comprises a hydrolysis acidification tank, an anaerobic fermentation tank, a biological desulfurization device and a gas storage cabinet which are arranged in sequence; the gas storage cabinet is connected with a biogas torch in parallel; the other path of the parallel gas storage cabinet is connected with a methane purification device and a methane purification device; the biogas outlet of the anaerobic fermentation tank is connected with the biological desulfurization device; a digestive juice outlet of the anaerobic fermentation tank is connected with a dehydration device; a biogas slurry outlet of the dehydration device is connected with a sewage treatment plant, and a biogas residue outlet of the dehydration device is connected with an organic fertilizer device; a wet base outlet of the squeezing device is connected to the light impurity separation device; the biogas purification device is connected with a biogas power generation device; the biogas purification device is connected with a natural gas pipe network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610416641.4A CN105880264B (en) | 2016-06-14 | 2016-06-14 | RDF (resource description framework) system and method for domestic garbage squeezing, classification, quality-based treatment and resource utilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610416641.4A CN105880264B (en) | 2016-06-14 | 2016-06-14 | RDF (resource description framework) system and method for domestic garbage squeezing, classification, quality-based treatment and resource utilization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105880264A CN105880264A (en) | 2016-08-24 |
| CN105880264B true CN105880264B (en) | 2020-12-01 |
Family
ID=56730644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610416641.4A Active CN105880264B (en) | 2016-06-14 | 2016-06-14 | RDF (resource description framework) system and method for domestic garbage squeezing, classification, quality-based treatment and resource utilization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105880264B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107774674A (en) * | 2016-08-30 | 2018-03-09 | 陕西鑫能环境科技股份有限公司 | A kind of consumer waste incineration pretreatment unit and electricity generation system |
| CN106734083B (en) * | 2016-12-19 | 2019-01-15 | 北京环境工程技术有限公司 | A kind of mechanical pretreatment system and technique for Urban Domestic Waste Comprehensive Treatment |
| CN109013656B (en) * | 2018-08-16 | 2023-12-29 | 中国联合工程有限公司 | Domestic garbage recycling treatment system |
| CN111778148A (en) * | 2020-07-21 | 2020-10-16 | 重庆大学 | Kitchen waste biological treatment integrated equipment and method |
| CN111872046A (en) * | 2020-07-29 | 2020-11-03 | 山东百川同创能源有限公司 | Household garbage fuel homogenization treatment process, system and application |
| CN112484041A (en) * | 2020-10-15 | 2021-03-12 | 江苏梵坤环保科技发展股份有限公司 | Solid waste recycling treatment method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5504259A (en) * | 1992-10-29 | 1996-04-02 | Midwest Research Institute | Process to convert biomass and refuse derived fuel to ethers and/or alcohols |
| CN1270637C (en) * | 2004-09-04 | 2006-08-23 | 张宁生 | Method for preparing high activity alfalfa food fiber |
| CN102728601A (en) * | 2011-04-15 | 2012-10-17 | 张希曾 | Technology for full classification recycling treatment on household waste |
| CN102441560B (en) * | 2011-04-18 | 2015-05-06 | 深圳市龙澄高科技环保有限公司 | Domestic garbage compression-classification-comprehensive disposal-and-utilization system |
| CN102247971B (en) * | 2011-05-05 | 2012-11-14 | 北京水气蓝德环保科技有限公司 | Process for treating kitchen waste by mechanical sorting and two-phase anaerobic fermentation |
| CN103756748A (en) * | 2014-01-24 | 2014-04-30 | 大连泰达环保有限公司 | Preparation method of composite derived fuel |
-
2016
- 2016-06-14 CN CN201610416641.4A patent/CN105880264B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105880264A (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105880264B (en) | RDF (resource description framework) system and method for domestic garbage squeezing, classification, quality-based treatment and resource utilization | |
| CN102728601A (en) | Technology for full classification recycling treatment on household waste | |
| CN105665410A (en) | Household garbage fine separation and complete recycling comprehensive treatment process | |
| CN111036643A (en) | Method for cooperatively treating kitchen waste, household garbage and sludge of sewage plant | |
| CN102268310A (en) | Method for preparing biomass fuel by utilizing food wastes | |
| CN106047940A (en) | Method and system for anaerobic digestion biogas generation by recycling of household garbage | |
| CN112661372A (en) | Household garbage, kitchen garbage, municipal excrement and municipal sludge co-treatment method | |
| CN102357506A (en) | Method for wet treatment and resource utilization of household garbage | |
| CN101642766A (en) | Town domestic garbage resource generation recycling environment-friendly treatment method | |
| CN101829672A (en) | Treating method and device for urban domestic rubbish | |
| CN111389878A (en) | Domestic waste solid zero release processing system | |
| CN106824998A (en) | The sorting equipment and its classification method of disposal of a kind of categorized consumer waste disposal | |
| CN105032891A (en) | Pyrolysis energy conversion method for fully recycling of household garbage | |
| CN111085526A (en) | Method for treating small-scale kitchen waste in cities and towns | |
| CN101920260B (en) | Comprehensive treatment and utilization method for urban garbage | |
| CN2778417Y (en) | Device for treating urban domestic refuse by means of wet method cement production system | |
| CN105983566A (en) | Domestic sewage and rubbish, dining-room kitchen waste and riverway sludge integrated treatment process | |
| CN106077029A (en) | Domestic garbage resource integrated conduct method and processing system | |
| CN103551367B (en) | Municipal living refuse comprehensive treatment method | |
| CN212069896U (en) | Domestic waste solid zero release processing system | |
| CN113134501A (en) | Household garbage pretreatment system and method | |
| EP2268426B1 (en) | Integrated plant for separation, recovery and re-use of solid domestic waste, with production of cement and/or bricks | |
| CN116140332A (en) | Resource recovery method for comprehensive treatment of urban household garbage sorting and carbonization | |
| CN202238278U (en) | Sorting device of domestic refuse incineration ash | |
| CN205701835U (en) | One way of life rubbish compression-classification dual treatment resource utilization system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 518117, Shenzhen, Longgang Ping Ping Street, Gaoqiao community, Ping Road, No., building 13, floor 2 Applicant after: Shenzhen langkun environmental group Limited by Share Ltd Address before: 518117, Shenzhen, Longgang Ping Ping Street, Gaoqiao community, Ping Road, No., building 13, floor 2 Applicant before: Shezhen Leo King Environment Protection Co., Ltd. |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |