CN113842879B - Method for preparing organic adsorbent by utilizing decoration garbage sorting waste, application of organic adsorbent and sewage treatment system - Google Patents
Method for preparing organic adsorbent by utilizing decoration garbage sorting waste, application of organic adsorbent and sewage treatment system Download PDFInfo
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Hydrology & Water Resources (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of solid waste recycling of decoration garbage, in particular to a method for preparing an organic adsorbent by utilizing decoration garbage sorting waste, application of the organic adsorbent and a sewage treatment system. According to the invention, pyrolysis is carried out on decoration garbage sorting waste, wherein sundries such as wood, plastics, fiber fabrics and the like are pyrolyzed to generate pyrolysis gas and pyrolysis oil with high added value, so that the profit space and capacity of enterprises are expanded; meanwhile, the porous adsorption material prepared from the carbon residue and the aerated block obtained by pyrolysis can be used as an adsorbent for sewage treatment, the production cost is low, the high-value utilization space is large, the profit space and capacity of enterprises can be further expanded, secondary solid waste and pollution gas cannot be generated in the pyrolysis process, the environment-friendly control pressure is low, in addition, the method carries out mild pyrolysis on the decoration garbage sorting waste under the anaerobic condition, no heat source or auxiliary agent is additionally added in the pyrolysis process, and the whole energy consumption is low.
Description
Technical Field
The invention relates to the technical field of solid waste recycling of decoration garbage, in particular to a method for preparing an organic adsorbent by utilizing decoration garbage sorting waste, application of the organic adsorbent and a sewage treatment system.
Background
The mass ratio of the aerated block in the raw material composition of the domestic decoration garbage is about 10 percent, the mass ratio of sundries (hereinafter abbreviated as light sundries) such as wood, plastic, fiber fabrics and the like is about 14 percent, and the aerated block is recycledThe main treatment process is 'multi-stage crushing, multi-stage screening and multi-stage sorting', wherein multi-stage sorting impurity removal is mainly a manual sorting, magnetic separation and vibration coupling wind force sorting technology. The vibration coupling wind power sorting is mainly to sort by utilizing the granularity, shape and specific gravity difference between aggregate and sundries, but because the specific gravity of the aerated block and the light sundries is similar, the air feeding block is about 500-700 kg/m 3 The particle size and the shape of the light sundries separated by the vibration coupling wind power are similar after the multistage crushing and the screening, so that a large number of air adding blocks are mixed in the light sundries separated by the vibration coupling wind power.
At present, the main stream mode of recycling treatment of decoration garbage sorting wastes is to send payment to a garbage incineration power plant for digestion treatment, and the specific implementation process is as follows:
s1, drying
Because of the special requirement of power generation, in order to improve the combustion heat value of the decoration garbage sorting waste, the water content of the decoration garbage sorting waste must be controlled, and the water content is usually controlled to be below 15% by heating or piling, fermenting and dehydrating, which is an essential step in the prior art;
s2, crushing
The decoration garbage sorting waste with small and uniform granularity has good air permeability and large specific surface area in the incineration process, can be fully contacted with oxygen for combustion, and improves the combustion efficiency. Different types of combustion furnaces have different requirements on the granularity of raw materials, and if a fluidized bed incinerator is adopted, the raw materials are crushed to be less than 5mm.
S3, burning
The decoration garbage sorting waste meeting the requirements of moisture and granularity is conveyed into an incinerator for combustion, the furnace temperature is 850-1100 ℃, and a large amount of heat energy and discharged slag bottom ash are generated by combustion.
S4, boiler steam power generation
A large amount of heat energy generated by combustion drives a steam turbine to rotate through saturated steam generated by a boiler, so that a generator generates electricity, and fly ash is generated in the flue gas purification process.
However, the above method has the following problems: 1. decoration garbage sorting waste is paid by a decoration garbage recycling disposal service provider and sent to a garbage incineration power plant for digestion disposal, but because a large number of nonflammable gas adding blocks are contained in the decoration garbage sorting waste, the overall combustion heat value is low, combustion process needs to be additionally supplemented with combustion improver, slag bottom ash amount is increased by burning, the secondary disposal cost of slag is increased, and the overall comprehensive cost of power generation is increased, so that the payment and digestion cost is increased. The existing general decoration garbage sorting waste is sent to a garbage incineration power station for paying and consuming the cost up to 200-300 yuan/ton, so that the profit space of a decoration garbage recycling disposal server is greatly compressed; 2. the utilization rate of the waste sorting waste for decoration incineration power generation is low, chemical energy is partially converted into heat energy when the waste sorting waste for decoration incineration is burnt, the generated heat energy is partially converted into saturated steam internal energy through a preheating boiler, the saturated steam drives a turbine to rotate, part of internal energy is converted into mechanical kinetic energy, the turbine realizes that the mechanical kinetic energy is partially converted into electric energy through a generator, the energy is transmitted and converted in multiple stages, the energy is lost layer by layer, and finally the conversion utilization rate is low; in addition, a large amount of nonflammable aerated blocks in the waste are discharged as slag bottom ash, the waste fly ash containing heavy metal is generated by purifying the flue gas, and harmful gases such as dioxin and the like are generated by incomplete combustion, so that the secondary control pressure of pollutants is increased; 3. the comprehensive energy consumption of the decoration garbage sorting waste incineration power generation is high, high-temperature incineration is usually adopted for avoiding generating harmful gases such as dioxin in the incineration process, the incineration temperature exceeds 850 ℃, in addition, in order to maintain high-temperature flue gas (more than 850 ℃), the content of dioxin in the flue gas is reduced, primary preheating wind and secondary preheating wind are usually added, and the temperature of the preheating wind is about 200 ℃. In addition, when the low-grade heat value of the incineration raw material is lower than 800Kcal/kg, combustion improver such as heavy oil and the like is additionally supplemented, so that the overall comprehensive energy consumption is higher.
In view of the existing problems, development of a new way for recycling and disposing the decoration garbage sorting wastes is needed, and the invention is particularly provided.
Disclosure of Invention
The invention aims to provide a process and a method for circularly preparing a sewage adsorbent by using decoration garbage sorting wastes, which are used for solving the problems of high payment and absorption cost, low recycling rate, high energy consumption, secondary solid waste and atmospheric pollution, high environmental protection pressure and the like in the conventional incineration power generation of the decoration garbage sorting wastes.
In order to solve the technical problems and achieve the purposes, the invention provides the following technical scheme:
in a first aspect, the invention provides a method for treating decoration garbage sorting waste, the method comprises the steps of performing anaerobic pyrolysis on the decoration garbage sorting waste to obtain a solid mixture, and crushing the solid mixture to obtain an organic adsorbent; the decoration garbage sorting waste comprises light impurities doped with air-adding blocks, and the mass ratio of the air-adding blocks to the light impurities is 1:0.5 to 2; the solid mixture comprises carbon slag and air-entraining blocks, and the mass ratio of the carbon slag to the air-entraining blocks is 1:0.6 to 6; the water content of the decoration garbage sorting waste is less than 10% according to the mass ratio.
In alternative embodiments, the moisture content of the finishing refuse sorting waste includes, but is not limited to, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% by mass.
The moisture of the decoration garbage sorting waste is controlled below 10% before the decoration garbage sorting waste enters pyrolysis, so that on one hand, the garbage sorting waste is too high in moisture, the quality of pyrolysis tar is seriously reduced, the heat value of the pyrolysis tar is reduced, the market demand degree is not met, and the vending profit space is greatly compressed; on the other hand, the water content is too high, and even if an exhaust system is smooth, a large amount of energy required by pyrolysis can be taken away by water evaporation in the pyrolysis process, so that energy sources can be added inevitably for guaranteeing pyrolysis temperature conditions, and the pyrolysis cost is increased.
In an alternative embodiment, the finishing refuse sorting waste further comprises a drying step prior to the anaerobic pyrolysis.
Preferably, the drying step comprises drying the decoration garbage sorting waste at 85-110 ℃ in a drying atmosphere.
Preferably, the drying atmosphere comprises a drying inert gas.
Preferably, the dry inert gas comprises dry nitrogen.
Preferably, the finishing refuse sorting waste is dried in a drying atmosphere at 105 ℃.
Preferably, the finishing refuse sorting waste is crushed to a particle size of 10-25 mm, including but not limited to 10mm, 15mm, 20mm or 25mm, before drying.
In alternative embodiments, the temperature of the anaerobic pyrolysis is 350 to 550 ℃, including but not limited to 350 ℃, 400 ℃, 450 ℃, 500 ℃, or 550 ℃.
In alternative embodiments, the solid mixture is crushed to a particle size of less than 5mm, including but not limited to 1mm, 2mm, 3mm, 4mm, or 5mm, to yield the organic adsorbent.
In a second aspect, the present invention provides an organic matter adsorbent prepared by the treatment method according to any one of the foregoing embodiments, where the organic matter adsorbent includes carbon residue particles and aerated block particles, and a mass ratio of the carbon residue particles to the aerated block particles is 1: and 0.6-6, wherein the particle size of the carbon residue particles and the air entrainment block particles is smaller than 5mm.
In a third aspect, the present invention provides an organic matter adsorbent prepared by the treatment method according to any one of the preceding embodiments, or an application of the organic matter adsorbent according to the preceding embodiments in waste treatment.
In an alternative embodiment, the waste comprises sewage or waste gas, and the obtained organic matter adsorbent has remarkable adsorption effect on organic matters in a liquid phase and volatile organic matters in a gas phase, and can be used for harmless treatment of sewage and waste gas.
Preferably, the wastewater comprises a body of water enriched with organic contaminants.
Preferably, the sewage comprises black and odorous river water bodies, organophosphorus pesticide polluted water bodies or domestic washing sewage.
Preferably, the exhaust gas comprises a gas enriched in organic pollutants.
Preferably, the waste gas comprises organic waste gas or sintering flue gas generated in the production of the refined terephthalic acid, and the organic waste gas generated in the production of the refined terephthalic acid contains organic matters such as paraxylene, acetic acid, methyl acetate and the like, and can be adsorbed by the organic adsorbent to realize harmless treatment; the sintering flue gas in industry usually contains pollutants such as dioxin, VOCs and the like, and can be adsorbed by the organic adsorbent.
In a fourth aspect, the present invention provides a sewage treatment method, the treatment method comprising adding the organic adsorbent according to the foregoing embodiment to sewage, and then performing solid-liquid separation to obtain an aqueous phase from which organic matters are removed and an organic adsorbent from which organic matters are adsorbed;
the sewage comprises black and odorous river water bodies, organophosphorus pesticide polluted water bodies or domestic washing sewage.
Preferably, the sewage quality is monitored in the sewage treatment process, and the monitoring index comprises at least one of BOD, COD, SS, pH or heavy metal ion content.
Preferably, the adding amount of the organic matter adsorbent is 40-60 g/L.
Preferably, the adsorption time is 12 to 24 hours.
Preferably, the adsorption temperature is 20 to 25 ℃.
Preferably, the sewage treatment process is stirred at a stirring speed of 30-60 rpm.
In a fifth aspect, the present invention provides a sewage treatment system, the sewage treatment system comprising a pretreatment line, a pyrolysis line, and a sewage treatment line connected by a production line, the sewage treatment line using the organic adsorbent according to the foregoing embodiment;
the pretreatment production line comprises a drying device, a drying device and a drying device, wherein the drying device is used for drying the decoration garbage sorting waste and the organic adsorbent after adsorbing organic matters; optionally, according to the material flowing direction, the upstream of the drying device further comprises a crushing device for crushing the decoration garbage sorting waste, and a material conveying device is arranged between the crushing device and the drying device;
the pyrolysis production line comprises a pyrolysis device, a separation device and a separation device, wherein the pyrolysis device is used for performing anaerobic pyrolysis on decoration garbage sorting waste from the pretreatment production line and/or organic adsorbent adsorbing organic matters, and separating a pyrolyzed solid mixture;
the sewage treatment production line comprises a crushing device, a material receiving and feeding device and a sewage purifying device; the crushing device is used for crushing the solid mixture coming from the pyrolysis production line into granular organic matter adsorbent, the material receiving and feeding device is used for receiving the organic matter adsorbent produced by the crushing device and feeding the organic matter adsorbent into the sewage purifying device, and the sewage purifying device is used for providing a reaction space required by sewage purification and regulating and controlling purification reaction parameters.
Preferably, the method further comprises the step of fixing the granular organic adsorbent after the granular organic adsorbent is received by the material receiving and feeding device and before the granular organic adsorbent is fed into the sewage purifying device.
Preferably, the fixing step includes adopting a surface open-pore container to contain the granular organic matter adsorbent, wherein the surface pore diameter of the surface open-pore container is smaller than the particle diameter of the granular organic matter adsorbent.
In an alternative embodiment, the pretreatment production line comprises a double-toothed roller shearing crusher and a closed drying chamber, wherein the double-toothed roller shearing crusher and the closed drying chamber are used for conveying materials through a closed belt conveyor, and a discharge hole of the closed drying chamber is connected with a production line;
the pyrolysis production line comprises a heat accumulating type rotating bed, wherein the heat accumulating type rotating bed is provided with a closed spiral feeder and a closed spiral discharging machine, and the closed spiral feeder and the closed spiral discharging machine are connected with a production pipeline through a closed belt conveyor;
the sewage treatment production line comprises an impact crusher, a material receiving and throwing device and a sewage purifying tank, wherein a feed inlet of the impact crusher is connected with a production pipeline, the material receiving and throwing device is a surface open-pore container with a bin gate, and the aperture of the hole is smaller than the particle size of the granular organic matter adsorbent;
the treatment system further comprises an air cooling circulation system, the air cooling circulation system comprises an inert gas circulation cooling pipeline and an induced draft fan, the inert gas circulation cooling pipeline is communicated with the airtight drying chamber and the spiral discharging machine of the heat accumulating type rotating bed, a feeding hole of the spiral discharging machine is connected with an air inlet of the airtight drying chamber through the inert gas circulation cooling pipeline, and a discharging hole of the spiral discharging machine is connected with an air outlet of the airtight drying chamber through the inert gas circulation cooling pipeline.
Preferably, the sewage treatment production line is also provided with a solid-phase buffer bin, and the solid-phase buffer bin is connected with a feed inlet of the closed drying chamber through a belt conveyor.
Preferably, the surface-open-cell container interior is divided into two or more gratings.
Preferably, the surface-open-cell container is a cube.
Preferably, a stirring device and/or an on-line water quality monitoring device are arranged in the sewage purifying tank.
Preferably, the sewage purifying tank is connected with an external municipal pipe network pipeline.
The method has the beneficial effects that the pyrolysis is carried out on the decoration garbage sorting waste, wherein sundries such as wood, plastics, fiber fabrics and the like generate pyrolysis gas and pyrolysis oil with high added value through pyrolysis, and the profit space and capacity of enterprises are expanded; meanwhile, the porous adsorption material prepared from the carbon residue and the aerated block obtained by pyrolysis can be used as an adsorbent for sewage treatment, the production cost is low, the high-value utilization space is large, the profit space and capacity of enterprises can be further expanded, secondary solid waste and pollution gas cannot be generated in the pyrolysis process, the environment-friendly control pressure is low, in addition, the method carries out mild pyrolysis on the decoration garbage sorting waste under the anaerobic condition, no heat source or auxiliary agent is additionally added in the pyrolysis process, and the whole energy consumption is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a process flow diagram of example 16 of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Terminology:
light sundries mainly comprise three types of sundries according to the decoration garbage components, wherein the three types of sundries are wood sundries (the density is 0.44-0.80g/cm 3 ) Most of the materials are soft miscellaneous materials used as structural materials and hard miscellaneous materials used for manufacturing and decorating furniture; plastic sundries (density of 0.8-2.2 g/cm) 3 ) The synthetic resin and the natural resin are used as raw materials to manufacture the decorative plate and the pipe; the sundries of the fiber fabrics are made of natural fibers and chemical fibers, such as ground decorations, wall surface decorations, hanging and shielding decorations, furniture decorations, bedding articles, toiletries, kitchen articles and fiber arts and crafts. The weight ratio of the light sundries in the domestic decoration garbage is about 14 percent.
Room temperature, which refers to the temperature in a common production facility or laboratory where workers or laboratory personnel are working, is typically 20-25 ℃.
The material transporting device refers to a device capable of realizing the transportation of materials between upstream and downstream equipment, and comprises a fixed pipeline for transporting the materials and a material transporting device capable of realizing the functions of material receiving, short-distance transportation and material throwing.
The exhaust gas refers to flue gas derived from industry, such as sintering flue gas, waste incineration flue gas, coal-fired power generation exhaust gas, organic exhaust gas generated in the production of refined terephthalic acid, and the like.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
In a specific embodiment, the invention provides a method for treating decoration garbage sorting waste, which can prepare an organic matter adsorbent, and comprises the following steps:
s1, performing anaerobic pyrolysis on decoration garbage sorting waste at the temperature of 350-550 ℃, wherein the water content of the decoration garbage sorting waste is less than 10%, the decoration garbage sorting waste comprises light impurities doped with aerated blocks, and the mass ratio of the aerated blocks to the light impurities is 1:0.5 to 2.
S2, cooling the mixture of the pyrolyzed aerated block and the carbon residue to room temperature;
s3, crushing the cooled mixture of the air adding block and the carbon residue until the particle size is smaller than 5mm, and obtaining the organic adsorbent. Single-layer or multi-layer screening with different granularity can be added according to the granularity requirement of the adsorbent product in the market, and the return material crushing link on the screen is added.
In one specific embodiment, the invention provides an organic matter adsorbent, which comprises carbon residue particles and air-entrapping block particles, wherein the mass ratio of the carbon residue particles to the air-entrapping block particles is 1: and 0.6-6, wherein the particle size of the carbon residue particles and the air entrainment block particles is smaller than 5mm.
In one embodiment, the invention provides a method for treating sewage by applying the organic matter adsorbent provided by the embodiment, wherein the sewage comprises black and odorous river water bodies, organic phosphorus pesticide polluted water bodies or domestic washing sewage, the treatment method comprises the steps of adding the organic matter adsorbent into the sewage, and then carrying out solid-liquid separation to obtain an aqueous phase for removing organic matters and the organic matter adsorbent for adsorbing the organic matters, and optionally, monitoring the sewage water quality in the sewage treatment process, wherein the monitoring index comprises at least one of BOD, COD, SS, pH or heavy metal ion content; optionally, the adding amount of the organic adsorbent is 40-60 g/L, the adsorption time is 12-24 h, the adsorption temperature is 20-25 ℃, the sewage treatment process is stirred, and the stirring speed is 30-60 rpm.
In one embodiment, the invention provides a sewage treatment system, which comprises a pretreatment production line, a pyrolysis production line and a sewage treatment production line, wherein the production lines are sequentially connected, and the sewage treatment production line uses the organic matter adsorbent in the previous embodiment;
the pretreatment production line comprises a drying device, a drying device and a drying device, wherein the drying device is used for drying the decoration garbage sorting waste and the organic adsorbent after adsorbing organic matters; optionally, according to the material flowing direction, the upstream of the drying device further comprises a crushing device for crushing the decoration garbage sorting waste, and a material conveying device is arranged between the crushing device and the drying device;
the pyrolysis production line comprises a pyrolysis device, a separation device and a separation device, wherein the pyrolysis device is used for performing anaerobic pyrolysis on decoration garbage sorting waste from the pretreatment production line and/or organic adsorbent adsorbing organic matters, and separating a pyrolyzed solid mixture; the pyrolysis device comprises a regenerative rotating bed, a fixed bed or a fluidized bed.
The sewage treatment production line comprises a crushing device, a material receiving and feeding device and a sewage purifying device; the crushing device is used for crushing the solid mixture coming from the pyrolysis production line into granular organic matter adsorbent, the material receiving and feeding device is used for receiving the organic matter adsorbent produced by the crushing device and feeding the organic matter adsorbent into the sewage purifying device, and the sewage purifying device is used for providing a reaction space required by sewage purification and regulating and controlling purification reaction parameters.
The beneficial effects that above-mentioned sewage treatment system can obtain include:
1. the pyrolysis technology is coupled with the traditional mineral processing technology, so that the decoration garbage sorting waste is completely converted into pyrolysis oil and pyrolysis gas with high added values and the adsorbent which can be circularly used for sewage treatment, waste is changed into valuable, the recycling utilization rate is high, and the cost is reduced and the efficiency is improved for enterprises.
2. No secondary waste residue, waste gas and waste water are generated, and the environment is friendly.
3. The process is simple, the working condition is mild, and the comprehensive energy consumption is low. The pyrolysis process does not need additional heating sources and auxiliary agents, and the comprehensive energy consumption is reduced.
Examples 1 to 3, comparative examples 1 and 2
This group of embodiments provides a method for preparing an organic adsorbent, comprising the following steps, examples 1 to 3, comparative examples 1 and 2 are different in temperature of anaerobic pyrolysis, as shown in table 1.
S11, performing anaerobic pyrolysis on the decoration garbage sorting waste at a certain temperature (shown in table 1), wherein the water content of the decoration garbage sorting waste is 10%, the decoration garbage sorting waste comprises light impurities doped with air-adding blocks, and the mass ratio of the air-adding blocks to the light impurities is 1:1.
s12, cooling the mixture of the pyrolyzed aerated block and the carbon residue to room temperature;
s13, crushing the cooled mixture of the air adding block and the carbon residue until the particle size is 5mm, and obtaining the organic adsorbent.
Examples 4 to 6, comparative examples 3 and 4
The specific steps of the preparation method of the organic matter adsorbent are shown in the example 1, and the difference from the example 1 is that the anaerobic pyrolysis temperature is 450 ℃, and the moisture content of the decoration garbage sorting waste is different, as shown in the table 1.
Examples 7 to 9, comparative examples 5 and 6
The specific steps of the preparation method of the organic matter adsorbent are shown in the example 1, and the difference between the specific steps and the example 1 is that the anaerobic pyrolysis temperature is 450 ℃, and the mass ratio of the aerated mass to the light impurity is shown in the table 1.
Examples 10 to 12, comparative examples 7 and 8
The embodiment of the present group provides a preparation method of an organic adsorbent, and the specific steps are shown in example 1, and the difference between the specific steps and example 1 is that the anaerobic pyrolysis temperature is 450 ℃, and the mixture of the gas-filled block and the carbon residue is crushed to different particle sizes, as shown in table 1.
Reference GB/T7488-1987 "five day Biochemical oxygen demand for Water quality (BOD) 5 ) The organic adsorbents provided in examples 1 to 12 and comparative examples 1 to 8 were used for BOD 5 The purification capacity of domestic sewage with the value of 250mg/L is detected, and the detection results are shown in Table 1.
TABLE 1 comparison of parameters for examples 1-12 and comparative examples 1-8 and BOD 5 Results comparison Table
BOD of general domestic sewage 5 About 250mg/L, different areas have larger difference, the height can reach about 500mg/L, and the experimental test results of the group adopt BOD 5 250mg/L domestic sewage is used as a test sample, the test method refers to the national standard, and BOD in each group of examples 5 The removal rate reaches 60% -65%; while BOD in each comparative group 5 The removal rate is only 30% -40%.
Examples 13 to 15
The present set of examples each provides an organic matter adsorbent comprising carbon residue particles and aerated block particles, the mass ratio of the carbon residue particles to the aerated block particles, and the particle sizes of the carbon residue particles and the aerated block particles are shown in table 2.
Table 2 table of compositions of organic adsorbents provided in examples 13 to 15
| Example 13 | Example 14 | Example 15 | |
| Mass ratio of carbon residue particles to the aerated block particles | 1：0.5 | 1：1 | 1：2 |
| Particle size of carbon residue particles and aerated block particles | 1mm | 1mm | 1mm |
Example 16
This embodiment provides a sewage treatment system, the treatment system includes pretreatment production line, pyrolysis production line and sewage treatment production line that production line connects gradually, sewage treatment production line uses the organic matter adsorbent that embodiment 14 provided.
The pretreatment production line comprises a double-toothed roller shearing crusher and a closed drying chamber, wherein the double-toothed roller shearing crusher and the closed drying chamber are used for conveying materials through a belt conveyor, and a discharge hole of the closed drying chamber is connected with a production pipeline.
The pyrolysis production line comprises a heat accumulating type rotating bed, wherein the heat accumulating type rotating bed is provided with a closed spiral feeder and a closed spiral discharging machine, and the closed spiral feeder and the closed spiral discharging machine are connected with a production pipeline through a closed belt conveyor.
The sewage treatment production line comprises an impact crusher, a material receiving and feeding device and a sewage purifying device, wherein a feed inlet of the impact crusher is connected with a production pipeline, and a solid-phase discharge bin of the sewage purifying device is connected with a feed inlet of a closed drying chamber through a belt conveyor.
The material connects and throws the cube that the device was made for the stainless steel, and upper and lower face is sealed, and wherein upper and lower closing plate is removable dismantles, is fixed grid form all around, and the empty size of grid is 0.1mm, and steel body surface all sprays waterproof anticorrosion and restraines algae lacquer, and the breaker ejection of compact falls into the cube through ejection of compact chute, and the cube specifically puts in the mode and adopts mechanical lifting to put in sewage purification device.
The treatment system further comprises an air cooling circulation system, the air cooling circulation system comprises an inert gas circulation cooling pipeline and an induced draft fan, the inert gas circulation cooling pipeline is communicated with the closed drying chamber and the spiral discharging machine of the heat accumulating type rotating bed, a feeding port of the spiral discharging machine is connected with an air inlet of the closed drying chamber through the inert gas circulation cooling pipeline, a discharging port of the spiral discharging machine is connected with an air outlet of the closed drying chamber through the inert gas circulation cooling pipeline, and the inert gas comprises nitrogen, helium, neon or argon. The N is 2 The drying-cooling circulation system can fully utilize the sensible heat of the solid generated by pyrolysis, and reduce energy loss.
As shown in fig. 1, the sewage treatment by the treatment system (nitrogen is selected as the inert gas) comprises the following steps:
s1, drying
If the moisture content of the decoration garbage sorting waste is too high, the quality and the heat value of pyrolysis oil obtained by pyrolysis of sundries such as wood, plastics, fiber fabrics and the like can be affected, and secondly, the heat transfer efficiency of pyrolysis reaction can be reduced due to too high moisture content, and a large amount of reaction heat energy is taken away by moisture evaporation, so that energy loss is caused, the raw materials are necessary to be subjected to drying pretreatment, and the moisture content is controlled below 10%. The invention is realized by N 2 The drying-cooling circulation system carries out hot air drying and dehydration, and the drying medium is inert gas N 2 The drying temperature was 105 ℃. Circulating heat N through induced draft fan 2 Introducing into a closed drying chamber, fully contacting with the decoration garbage sorting waste distributed in staggered layers in the closed drying chamber, drying and dehydrating, and dehydratingH 2 O (g) and N 2 After condensation, gas-liquid separation is realized, and separated normal temperature N 2 For subsequent cooling of the pyrolysis solid product.
S2, pyrolysis
And (3) hermetically inputting the dried and dehydrated decoration garbage sorting waste into a pyrolysis furnace for pyrolysis by a belt conveyor and a screw feeder, wherein the pyrolysis temperature is 350-550 ℃. The pyrolysis process produces a mixture of pyrolysis oil, pyrolysis gas, pyrolysis carbon residue and aerated mass with high added value. Wherein, pyrolysis equipment can select the rotatory bed of heat accumulation formula.
S3, cooling
And conveying the solid product obtained by mixing the pyrolyzed carbon residues and the aerated blocks to a crushing unit through a closed spiral discharging machine and a belt conveyor. Wherein the spiral discharge is cooled by N 2 The drying-cooling circulation system is used for cooling, and the cooling medium is inert gas N 2 And cooled to room temperature. The normal temperature N separated from the gas and the liquid in the step S1 is introduced by a draught fan 2 Sucking into a closed spiral discharging machine, and enabling the gas inflow direction to be opposite to the material discharging direction so as to enable the normal temperature N to be the same as the normal temperature N 2 The heat exchange with the high-temperature material and the spiral discharging machine body is sufficient, then the high-temperature material is cooled to room temperature, and meanwhile, the spiral discharging machine can be cooled, so that the service life of the equipment is prolonged. Formed heat N after cooling high temperature material 2 And the materials are input into a closed drying chamber through a hot air blower in the step S1, and are dried and dehydrated at normal temperature and recycled.
S4, crushing
And feeding the cooled mixture of the carbon slag and the aerated block to a reaction crusher by a belt conveyor, wherein the crushing granularity is 5mm.
S5, sewage adsorption
The carbon slag and the air-entraining block crushed to 5mm are used for sewage adsorption, and the air-entraining block and the carbon slag have high porosity, so that the carbon slag and the air-entraining block have good adsorptivity to organic matters in sewage, and especially to organic phosphorus in sewage.
S6, drying the adsorbent
Drying and dewatering the saturated and adsorbed air-added blocks and carbon residues, wherein the saturated and adsorbed air-added blocks and carbon residues can share the same density with the decoration garbage sorting waste in the step S1Closing the drying chamber, wherein the drying medium is heat N after cooling the high-temperature material in the step S3 2 。
S7, thermal desorption
And (3) hermetically inputting the dried and dehydrated saturated adsorbent into a pyrolysis furnace for pyrolysis by a belt conveyor and a screw feeder, wherein the pyrolysis temperature is 350-550 ℃. The pyrolysis process produces a mixture of pyrolysis oil, pyrolysis gas, pyrolysis carbon residue and aerated mass with high added value. Wherein, pyrolysis equipment can select the rotatory bed of heat accumulation formula.
S8, cooling the adsorbent
The carbon residue and aerated block cooling medium after pyrolysis and desorption are normal temperature N separated from condensed gas and liquid after the adsorbent in S6 is dried and dehydrated 2 And cooled to room temperature.
S9, re-adsorption of sewage
The cooled pyrolytic desorption carbon residue and the aerated block are recycled for sewage treatment, and organic matters, especially organic phosphorus, in the sewage are adsorbed again.
Example 17 and example 18
Examples 17 and 18 provide a sewage treatment system, respectively, which is identical to example 16 in its entirety, except that the anaerobic pyrolysis apparatus is a fixed bed and a fluidized bed, respectively.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (30)
1. A method for treating decoration garbage sorting waste is characterized by comprising the following steps of,
performing anaerobic pyrolysis on the decoration garbage sorting waste to obtain a solid mixture, and crushing the solid mixture to obtain an organic adsorbent;
the temperature of the anaerobic pyrolysis is 350-550 ℃;
crushing the solid mixture until the particle size is smaller than 5mm to obtain an organic matter adsorbent;
the decoration garbage sorting waste comprises light impurities doped with air-adding blocks, and the mass ratio of the air-adding blocks to the light impurities is 1:0.5 to 2;
the solid mixture comprises carbon slag and air-entraining blocks, and the mass ratio of the carbon slag to the air-entraining blocks is 1:0.6 to 6;
the water content of the decoration garbage sorting waste is less than 10% according to the mass ratio.
2. The method of claim 1, wherein the finishing refuse sorting waste further comprises a drying step prior to the anaerobic pyrolysis.
3. The method according to claim 2, wherein the drying step comprises drying the sorted waste of the decorative waste at 85 to 110 ℃ in a drying atmosphere.
4. A process according to claim 3, wherein the drying atmosphere comprises a dry inert gas.
5. The process of claim 4 wherein the dry inert gas comprises dry nitrogen.
6. A method of treating waste as claimed in claim 3, wherein the waste is dried in a dry atmosphere at 105 ℃.
7. A method of treating waste as claimed in claim 3, wherein the waste is crushed to a particle size of 10 to 25mm before drying.
8. The organic matter adsorbent prepared by the treatment method according to any one of claims 1 to 7, wherein the organic matter adsorbent comprises carbon residue particles and aerated block particles, and the mass ratio of the carbon residue particles to the aerated block particles is 1: and 0.6-6, wherein the particle size of the carbon residue particles and the air entrainment block particles is smaller than 5mm.
9. An organic adsorbent prepared by the treatment method according to any one of claims 1 to 7, or the use of the organic adsorbent according to claim 8 in waste treatment.
10. The use according to claim 9, wherein the waste comprises sewage or waste gas.
11. The use of claim 10, wherein the wastewater comprises a body of water enriched with organic contaminants.
12. The use according to claim 11, wherein the contaminated water comprises black and odorous river water, organophosphorus pesticide contaminated water or domestic wash sewage.
13. The use according to claim 10, wherein the exhaust gas comprises a gas enriched in organic pollutants.
14. Use according to claim 13, wherein the waste gas comprises organic waste gas or sintering flue gas generated in the production of purified terephthalic acid.
15. A sewage treatment method, which is characterized in that the sewage treatment method comprises the steps of adding the organic matter adsorbent of claim 8 into sewage, and then carrying out solid-liquid separation to obtain an aqueous phase for removing organic matters and the organic matter adsorbent after adsorbing the organic matters;
the sewage comprises black and odorous river water bodies, organophosphorus pesticide polluted water bodies or domestic washing sewage.
16. The method of claim 15, wherein the wastewater quality is monitored during the wastewater treatment process, and the monitoring indicator comprises at least one of BOD, COD, SS, pH or heavy metal ion content.
17. The wastewater treatment method according to claim 15, wherein the organic adsorbent is added in an amount of 40 to 60g/L.
18. The method for treating sewage according to claim 15, wherein the adsorption time is 12 to 24 hours.
19. The method for treating sewage according to claim 15, wherein the adsorption temperature is 20 to 25 ℃.
20. The method for treating sewage according to claim 15, wherein the sewage treatment process is performed with stirring at a stirring rate of 30 to 60rpm.
21. A sewage treatment system, characterized in that the sewage treatment system comprises a pretreatment production line, a pyrolysis production line and a sewage treatment production line which are sequentially connected, wherein the sewage treatment production line uses the organic adsorbent according to claim 8;
the pretreatment production line comprises a drying device, a drying device and a drying device, wherein the drying device is used for drying the decoration garbage sorting waste and the organic adsorbent after adsorbing organic matters;
the pyrolysis production line comprises a pyrolysis device, a separation device and a separation device, wherein the pyrolysis device is used for performing anaerobic pyrolysis on decoration garbage sorting waste from the pretreatment production line and/or organic adsorbent adsorbing organic matters, and separating a pyrolyzed solid mixture;
the sewage treatment production line comprises a crushing device, a material receiving and feeding device and a sewage purifying device; the crushing device is used for crushing the solid mixture coming from the pyrolysis production line into granular organic matter adsorbent, the material receiving and feeding device is used for receiving the organic matter adsorbent produced by the crushing device and feeding the organic matter adsorbent into the sewage purifying device, and the sewage purifying device is used for providing a reaction space required by sewage purification and regulating and controlling purification reaction parameters.
22. The wastewater treatment system of claim 21, wherein the upstream of the drying means comprises a comminution means for comminuting the waste sorted from the finishing waste in the direction of flow of the material, and wherein a material transport means is provided between the comminution means and the drying means.
23. The wastewater treatment system of claim 21, further comprising a step of fixing the particulate organic matter adsorbent after the particulate organic matter adsorbent is received by the material receiving device and before the particulate organic matter adsorbent is received by the wastewater purification device.
24. The wastewater treatment system of claim 23, wherein the securing step comprises employing a surface-open-cell vessel containing the particulate organic matter adsorbent, the surface-open-cell vessel having a surface pore size smaller than a particle size of the particulate organic matter adsorbent.
25. The processing system of claim 21, wherein the processing system further comprises a processor configured to,
the pretreatment production line comprises a double-toothed roller shearing crusher and a closed drying chamber, wherein the double-toothed roller shearing crusher and the closed drying chamber are used for conveying materials through a closed belt conveyor, and the closed drying chamber is connected with a production pipeline;
the pyrolysis production line comprises a heat accumulating type rotating bed, wherein the heat accumulating type rotating bed is provided with a closed spiral feeder and a closed spiral discharging machine, and the closed spiral feeder and the closed spiral discharging machine are connected with a production pipeline through a closed belt conveyor;
the sewage treatment production line comprises an impact crusher, a material receiving and throwing device and a sewage purifying tank, wherein a feed inlet of the impact crusher is connected with a production pipeline, the material receiving and throwing device is a surface open-pore container with a bin gate, and the aperture of the hole is smaller than the particle size of the granular organic matter adsorbent;
the treatment system further comprises an air cooling circulation system, the air cooling circulation system comprises an inert gas circulation cooling pipeline and an induced draft fan, the inert gas circulation cooling pipeline is communicated with the airtight drying chamber and the spiral discharging machine of the heat accumulating type rotating bed, a feeding hole of the spiral discharging machine is connected with an air inlet of the airtight drying chamber through the inert gas circulation cooling pipeline, and a discharging hole of the spiral discharging machine is connected with an air outlet of the airtight drying chamber through the inert gas circulation cooling pipeline.
26. The treatment system of claim 25, wherein the wastewater treatment line is further provided with a solid phase buffer bin, and the solid phase buffer bin is connected with the feed inlet of the closed drying chamber through a belt conveyor.
27. The treatment system of claim 25, wherein the surface aperture container interior is partitioned into two or more gratings.
28. The processing system of claim 25 wherein said surface open cell container is a cube.
29. The treatment system of claim 25, wherein the wastewater purification tank is provided with a stirring device and/or an on-line water quality monitoring device.
30. The treatment system of claim 25, wherein the wastewater purification tank is connected to an external municipal pipe network.
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Country or region after: China Address after: 1701-1728, 17th floor, block a, building 1, yard 10, Xueqing Road, Haidian District, Beijing (Dongsheng District) Applicant after: Beijing Construction Engineering Resource Recycling Co.,Ltd. Address before: 1701-1728, 17th floor, block a, building 1, yard 10, Xueqing Road, Haidian District, Beijing (Dongsheng District) Applicant before: Beijing Construction Engineering Resources Recycling Co.,Ltd. Country or region before: China Country or region after: China Address after: 1701-1728, 17th floor, block a, building 1, yard 10, Xueqing Road, Haidian District, Beijing (Dongsheng District) Applicant after: Beijing Construction Engineering Resources Recycling Co.,Ltd. Address before: 1701-1728, 17th floor, block a, building 1, yard 10, Xueqing Road, Haidian District, Beijing (Dongsheng District) Applicant before: BCEG RESOURCES RECYCLING Co.,Ltd. Country or region before: China |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |