CN211345325U - System for organic solid waste incineration melting innocent treatment - Google Patents
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Abstract
The utility model relates to an organic solid waste treatment technical field provides an organic solid waste burns melting innocent treatment's system. The system provided by the utility model comprises a pretreatment device 1, a circulating fluidized bed incinerator 2, a waste heat recovery device 3, a flue gas purification device 4, a high-temperature entrained flow bed 5 and a chilling slag extractor 6; the system provided by the utility model does not need complex systems for grinding pretreatment and the like when the fly ash enters the high-temperature entrained flow for melting, and has low operation cost, low energy consumption and small equipment investment; utilize the utility model provides a system can realize the thorough innocent treatment of organic solid useless, does not have the pollution problem of flying dust and dioxin to can the by-product steam, use the utility model discloses a system is to organic solid useless the handling, has incineration efficiency height, and innoxious, minimizing and resourceful level are high, and economic benefits is good, easily industrialization is promoted and is applied.
Description
Technical Field
The utility model relates to an organic solid useless processing technology field especially relates to an organic solid useless system that burns melting innocent treatment.
Background
In recent years, with the rapid development of economy, the living standard of people is continuously improved, and the discharge amount of organic solid wastes such as household garbage, sludge, antibiotic bacterial residues, waste mineral oil, biomass and the like is increased year by year. According to statistics, the yield of wet sludge in cities and towns in 2018 is about 4646 ten thousand tons, the yield of industrial sludge is about 4000 ten thousand tons, and the harmless treatment rate of the sludge is still low, wherein the harmless treatment rate of the municipal sludge is only about 57%. According to the annual book of construction statistics of Chinese cities in 2017, 656 city cities are built in the inland city, and the clearing and transporting amount of the urban domestic garbage is 2.04 hundred million tons. According to statistics of the solid waste management center of the department of ecological environment, the total amount of dangerous waste generated in 2016 in China is 5588 ten thousand tons, and the amount reaches 6937 ten thousand tons in 2017. The hazardous waste mainly comprises industrial hazardous waste and medical waste, wherein the industrial hazardous waste accounts for more than 70 percent, and the medical waste accounts for about 14 percent. In the industrial hazardous waste, the organic hazardous waste accounts for 37 percent, the waste acid and the waste alkali account for 30 percent, the asbestos waste accounts for 14 percent, and the non-ferrous metal smelting waste accounts for 10 percent. For organic solid wastes such as household garbage, sludge and the like, the water content is higher, so that the organic solid wastes have large self quality and volume and are inconvenient for long-distance transportation and treatment. If the organic solid waste is randomly stacked, a large amount of microorganisms contained in the organic solid waste can propagate, so that the organic solid waste is rotten, toxic and harmful gas is generated, the human health is harmed, and meanwhile, the surrounding environment is also affected, so that a proper organic solid waste treatment technology is urgently needed to be found.
At present, the treatment technology of organic solid waste mainly comprises the following steps: landfill, compost utilization, anaerobic digestion, incineration and the like. The stability of a refuse landfill is influenced by landfill, the time for closing the landfill is prolonged, and the risk of secondary pollution exists; the problems of difficult degradation of toxic organic matters and accumulation of heavy metals exist in compost utilization, and the safety is questioned; the anaerobic digestion process has many flows, the equipment is expensive and depends on import, the biodegradability of organic solid waste is poor, and the economic benefit is not good; incineration is thermal oxidation treatment of combustible organic waste at high temperature, and under the condition of complete combustion, the removal rate of organic matters can reach 99%. Since incineration is a treatment method for decomposing and destroying wastes completely and thoroughly, the volume of the wastes can be greatly reduced, a small amount of slag generated by incineration can be landfilled for treatment, and the landfilling treatment amount of the wastes is greatly reduced, so that the incineration is widely used for the treatment of organic solid wastes. However, the incineration treatment of organic solid wastes has the problems of dioxin, hazardous waste fly ash and the like, the harmless level is low, the flue gas purification cost is high, the fly ash generated by incineration generally needs to be treated by solidification and landfill, electric melting or plasma melting, wherein the electric melting and plasma melting cost is high, the equipment investment is large, and the solidification and landfill has the risk of secondary pollution.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a system of organic solid useless incineration melting innocent treatment. The utility model provides a system operation is with low costs, heat utilization rate is high, incineration efficiency is high, and innoxious, minimizing and the resourceful level is high, and product economic benefits is good, and no secondary pollution easily industrialization is promoted and is used.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a system for the harmless treatment of incineration and melting of organic solid wastes comprises a pretreatment device 1; the pretreatment device 1 is provided with an organic solid waste inlet and a pretreatment material outlet;
a circulating fluidized bed incinerator 2; the circulating fluidized bed incinerator 2 is provided with a pretreatment material inlet, a preheated air inlet, a slag outlet and a high-temperature flue gas outlet, wherein the pretreatment material inlet is connected with the pretreatment material outlet of the pretreatment device 1;
the waste heat recovery device 3 is provided with a heat exchange flue gas inlet, a softened water inlet, a normal temperature air inlet, a low temperature flue gas outlet, a steam outlet and a preheated air outlet, the heat exchange flue gas inlet is connected with the high temperature flue gas outlet of the circulating fluidized bed incinerator 2, and the preheated air outlet is connected with the preheated air inlet of the circulating fluidized bed incinerator 2;
the flue gas purification device 4 is provided with a low-temperature flue gas inlet, a fly ash outlet and a standard flue gas outlet, and the low-temperature flue gas inlet is connected with the low-temperature flue gas outlet of the waste heat recovery device 3;
the high-temperature entrained flow bed 5 is provided with a fly ash inlet, a fuel inlet, an additive inlet, a slag outlet and a hot flue gas outlet, the fly ash inlet is connected with the fly ash outlet of the flue gas purification device 4, and the hot flue gas outlet is connected with the heat exchange flue gas inlet of the waste heat recovery device 3;
the chilling slag extractor 6 is provided with a slag inlet, a chilling water inlet, a molten glass outlet and a chilling water outlet, and the slag inlet is connected with the slag outlet of the high-temperature entrained flow bed 5.
Preferably, the pretreatment device 1 comprises one or more of a low-temperature drying device, a thin-layer drying device, a roller crusher and a screen.
Preferably, the flue gas purification device 4 comprises a bag-type dust collector or a cyclone dust collector.
Preferably, the high-temperature entrained-flow bed 5 is further provided with a slag inlet, and when the slag generated by the circulating fluidized bed incinerator 2 is hazardous waste, the generated slag is introduced into the high-temperature entrained-flow bed 5 from the slag inlet.
Preferably, the feeding mode of the high-temperature entrained flow bed 5 is low-temperature burner feeding; the number of the low-temperature burners is one or more.
Preferably, the arrangement mode of the low-temperature burners in the high-temperature entrained flow 5 is top, side or bottom.
Has the advantages that:
(1) the utility model provides a system utilizes circulating fluidized bed incinerator to burn organic solid waste, realizes minimizing and part innoxious, utilizes high temperature entrained flow bed to melt the flying dust to realize the thorough innoxious treatment of organic solid waste, and the flue gas that incineration disposal and melting produced can be used for producing steam, thereby realizes resource utilization, uses the utility model discloses a system handles organic solid waste, has apparent "three" effect, and incineration efficiency is high, and innoxious, minimizing and resource level are high, do not have the problem of flying dust and dioxin pollution, and economic benefits is good, easily industrialization popularization and application;
(2) the system provided by the utility model can carry out waste heat recovery and gas purification treatment on the high-temperature flue gas generated by the circulating fluidized bed incinerator and the hot flue gas generated by the high-temperature entrained flow bed together, has high heat energy utilization rate, can share the same flue gas purification system, and further saves investment and land occupation;
(3) in the system provided by the utility model, the high-temperature entrained flow bed is also provided with a slag inlet, if the slag obtained after the burning of the circulating fluidized bed is dangerous waste, the slag can be treated by crushing, grinding and the like and then introduced into the high-temperature entrained flow bed for melting treatment, thereby realizing the complete harmless treatment of organic solid waste;
(4) the system provided by the utility model has low operation cost, low energy consumption and small equipment investment;
(5) because flying dust particle diameter scope generally is 30 ~ 50 mu m, satisfies the high temperature entrained flow and goes into the stove requirement, consequently the flying dust does not need complicated crocus preliminary treatment when getting into the melting of high temperature entrained flow, makes the utility model discloses a system is simpler.
Drawings
Fig. 1 is a schematic structural diagram of the system for harmless treatment of organic solid waste incineration and melting, wherein: 1-a pretreatment device, 2-a circulating fluidized bed incinerator, 3-a waste heat recovery device, 4-a flue gas purification device, 5-a high-temperature entrained flow bed and 6-a chilling slag extractor;
FIG. 2 is a process flow chart of the harmless treatment of organic solid wastes by burning, melting and utilizing the system of the utility model.
Detailed Description
The utility model provides a system for organic solid waste burns melting innocent treatment, burn burning furnace 2, waste heat recovery device 3, flue gas purification device 4, high temperature entrained flow 5 and chilling slag extractor 6 including preprocessing device 1, circulating fluidized bed.
The system provided by the utility model comprises a pretreatment device 1. In the utility model, the pretreatment device is used for drying, crushing and other treatments to the organic solid wastes, so that the materials meet the requirements of the circulating fluidized bed incinerator, the combustion efficiency is improved, and the uniform distribution of the temperature of the hearth is realized; the pretreatment device is preferably one or more of a low-temperature drying device, a thin-layer drying device, a roller crusher and a screen, and is selected according to specific requirements; the pretreatment device 1 is provided with an organic solid waste inlet and a pretreatment material outlet.
The system provided by the utility model comprises a circulating fluidized bed incinerator 2. In the utility model, the circulating fluidized bed incinerator 2 is provided with a pretreatment material inlet, a preheated air inlet, a slag outlet and a high-temperature flue gas outlet, wherein the pretreatment material inlet is connected with the pretreatment material outlet of the pretreatment device 1; the circulating fluidized bed incinerator is used for incinerating organic solid waste to obtain slag and high-temperature flue gas, and reduction and partial harmless treatment of the organic solid waste are realized.
The system provided by the utility model includes waste heat recovery device 3. In the utility model, the waste heat recovery device 3 is provided with a heat exchange flue gas inlet, a softened water inlet, a normal temperature air inlet, a low temperature flue gas outlet, a steam outlet and a preheated air outlet, the heat exchange flue gas inlet is connected with the high temperature flue gas outlet of the circulating fluidized bed incinerator 2, and the preheated air outlet is connected with the preheated air inlet of the circulating fluidized bed incinerator 2; the waste heat recovery device 3 is used for recovering waste heat of high-temperature flue gas generated by the circulating fluidized bed incinerator and hot flue gas generated by the high-temperature entrained flow bed so as to generate low-temperature flue gas and is also used for producing steam byproducts. In the specific embodiment of the utility model, the waste heat recovery device is specifically a waste heat boiler and an air preheater, softened water is introduced into the waste heat boiler, and normal temperature air is introduced into the air preheater; the utility model discloses it is right concrete connection mode between exhaust-heat boiler and the air heater does not have special requirement, connects according to the well-known mode of technical personnel in the field, can realize above-mentioned scheme exhaust-heat recovery can.
The system provided by the utility model comprises a flue gas purification device 4. In the utility model, the flue gas purification device 4 is provided with a low-temperature flue gas inlet, a fly ash outlet and a standard flue gas outlet, and the low-temperature flue gas inlet is connected with the low-temperature flue gas outlet of the waste heat recovery device 3; the flue gas purification device is preferably a cyclone dust collector or a bag-type dust collector; in the embodiment of the present invention, if the flue gas contains acidic gas, the flue gas purification device preferably further comprises a deacidification device to deacidify the low-temperature flue gas; in the specific embodiment of the utility model, if contain materials such as dioxin and heavy metal in the low temperature flue gas, the gas cleaning device is preferred still to include preferably still to include the active carbon and spout and attach the device, just the active carbon is spouted and is attached the device setting before dust collector.
The system provided by the utility model comprises a high-temperature entrained flow bed 5. In the utility model, the high temperature entrained flow bed 5 is provided with a fly ash inlet, a fuel inlet, an additive inlet, a slag outlet and a hot flue gas outlet, the fly ash inlet is connected with the fly ash outlet of the flue gas purification device 4, and the hot flue gas outlet is connected with the heat exchange flue gas inlet of the waste heat recovery device 3; the feeding mode of the high-temperature entrained flow bed 5 is preferably low-temperature burner feeding; the number of the low-temperature burners is preferably single or multiple; the arrangement mode of the low-temperature burners in the high-temperature entrained flow 5 is preferably the top, the side or the bottom; the high-temperature entrained flow 5 is used for carrying out melting treatment on the fly ash to obtain molten slag.
In this embodiment, the high temperature entrained-flow bed 5 is preferably further provided with a slag inlet, when the slag generated by the circulating fluidized bed incinerator 2 is hazardous waste, the generated slag is introduced into the high temperature entrained-flow bed 5 from the slag inlet for melting treatment, and in order to make the particle size of the slag meet the requirement of the high temperature entrained-flow bed 5 for entering into the incinerator, the utility model discloses preferably use the mill powder pretreatment system to crush and mill the slag generated by the circulating fluidized bed incinerator 2, in the specific embodiment of the utility model, the inlet of the mill powder pretreatment system is connected with the slag outlet of the circulating fluidized bed incinerator 2, and the outlet of the mill powder pretreatment system is connected with the slag inlet of the high temperature entrained-flow bed 5; the utility model discloses it is right no special requirement to crocus pretreatment systems, use the technical personnel familiar in the field can.
The system provided by the utility model comprises a chilling slag extractor 6. In the utility model, the chilling slag extractor 6 is provided with a slag inlet, a chilling water inlet, a molten glass outlet and a chilling water outlet, and the slag inlet is connected with the slag outlet of the high-temperature entrained flow bed 5; the chilling slag extractor 6 is used for chilling the slag so as to obtain molten glass, thereby realizing thorough harmless treatment of organic solid waste.
When the system provided by the novel application is used for carrying out harmless treatment on the organic solid waste, the treatment method preferably comprises the following steps:
(a) pretreating organic solid waste by using a pretreatment device 1 to obtain a pretreated material;
(b) introducing the pretreated materials and preheated air into a circulating fluidized bed incinerator 2 together for incineration treatment to obtain high-temperature flue gas and furnace slag;
(c) introducing the high-temperature flue gas into a waste heat recovery device 3 for waste heat recovery treatment to obtain low-temperature flue gas;
(d) introducing the low-temperature flue gas into a gas purification device 4 for gas purification treatment to obtain fly ash and standard flue gas;
(e) introducing the fly ash, the fuel and the additive into a high-temperature entrained flow bed 5 together for melting treatment to obtain molten slag and hot flue gas; the additive comprises CaO and Al2O3And SiO2One or more of the above; the hot flue gas is introduced into a waste heat recovery device 3 to be subjected to waste heat recovery treatment together with the high-temperature flue gas;
(f) the slag enters a chilling slag extractor 6 for chilling treatment to obtain molten glass.
The utility model discloses it is right organic useless source and kind do not have special requirement admittedly, and what the skilled person in the art is familiar with organic useless admittedly all can use the utility model discloses a system carries out innocent treatment, specifically like municipal sludge, pharmaceutical factory waste residue and domestic waste etc..
The utility model discloses use preprocessing device 1 to carry out the preliminary treatment to organic solid useless, obtain the preliminary treatment material. In the utility model, the heat value of the pretreated material is preferably more than or equal to 1500kcal/kg, the water content is preferably less than or equal to 60 percent, and the particle size is preferably less than or equal to 15 mm. The utility model discloses heat value, moisture content and the particle diameter control of material in advance make it satisfy follow-up requirement of burning in circulating fluidized bed incinerator at above-mentioned within range, improve combustion efficiency to realize furnace temperature evenly distributed.
After obtaining the pretreatment materials, the utility model discloses will the pretreatment materials and preheated air let in circulating fluidized bed jointly and burn in burning furnace 2 and handle, obtain high temperature flue gas and slag. In the utility model, the temperature of the preheated air is preferably 160-400 ℃; the hearth temperature of the circulating fluidized bed incinerator is preferably 850-1000 ℃, and more preferably 900-950 ℃; the utility model has no special requirement on the flow of the preheated air, and the excess coefficient of the preheated air is set according to the method well known by the technical personnel in the field. The utility model discloses an incineration disposal makes the organic solid useless complete combustion of combustibility, realizes the minimizing and the part innoxious of organic solid useless, and a small amount of slag that incineration disposal produced carries out the landfill and handles can.
Burn and handle the completion after, the utility model discloses will the high temperature flue gas lets in among the waste heat recovery device 3 and carries out waste heat recovery processing, obtains the low temperature flue gas. The utility model discloses in, waste heat recovery handles specifically to be: introducing softened water into the waste heat recovery device 3, and heating the softened water by using high-temperature flue gas to obtain a steam byproduct; the obtained steam by-product can be used for heating, power generation and the like, so that the economic benefit of the utility model is improved, and the utility model is easier to be popularized and applied in industrialization; in addition, normal temperature air is introduced into the waste heat recovery device 3, the normal temperature air is preheated by using high temperature flue gas, and the obtained preheated air is introduced into the circulating fluidized bed incinerator 2. The utility model discloses in, flue gas temperature can drop to about 150 ~ 220 ℃ behind the waste heat recovery.
After obtaining the low temperature flue gas, the utility model discloses will the low temperature flue gas lets in and carries out gas purification in the gas purification device 4 and handles, obtains flying dust and flue gas up to standard. In the present invention, the carbon dust collected in the gas purification apparatus is fly ash.
After the gas purification treatment is finished, the utility model discloses will flying dust and fuel, additive let in high temperature entrained flow 5 jointly and carry out the melting and handle, obtain slag and hot flue gas. In the present invention, the additive comprises CaO and Al2O3And SiO2One or more of the above (1), 2 or 3); the weight ratio of the added CaO is preferably 0-20%, more preferably 0.1-18%, even more preferably 0.5-15%, and the Al is preferably 0-20% of the total weight of the fly ash and the additive being 100%2O3The addition weight ratio of (A) is preferably 0 to 25%, more preferably 0.1 to 22%, and further preferably 0.5 to 20%, and the SiO2The addition weight ratio of (A) is preferably 0 to 20%, more preferably 0.1 to 18%, and further preferably 0.5 to 15%; CaO and Al2O3And SiO2The addition weight ratio of (A) is preferably not 0 at the same time; the addition weight ratio is the ratio of the weight of the additive to the total weight of the fly ash and the additive; the utility model has no special requirement on the fuel, and can use one or a combination of several conventional fuels such as natural gas, liquefied petroleum gas and the like; the utility model discloses in, the furnace temperature of high temperature entrained flow bed is preferred 1200 ~ 1600 ℃, more preferred 1250 ~ 1500 ℃, and further preferred 1350 ~ 1400 ℃, uses the utility model discloses a system melts the flying dust, compares with traditional melting method (plasma melting etc.), and the processing temperature is lower, and then has reduced running cost.
The utility model discloses an add the supplementary flying dust of additive and form the slag, and the additive can play the effect that reduces the temperature interval (reduce 100 ~ 200 ℃) that material melting vitreous body generated, is favorable to innoxious vitreous body to generate.
In the utility model, when the slag obtained after the burning of the circulating fluidized bed is dangerous waste, the slag is preferably sent into a grinding pretreatment system for crushing, grinding and other treatments, and then the obtained powdery slag is sent into a high-temperature entrained flow bed; when the slag obtained after the incineration of the circulating fluidized bed is not dangerous waste, the slag is directly buried.
The utility model discloses in, during the hot flue gas that the melting was handled and is produced returned waste heat recovery device 3, carried out waste heat recovery with the high temperature flue gas together and handled, specific waste heat recovery method is no longer repeated. The utility model provides a system can carry out waste heat recovery jointly with the high temperature flue gas that incineration disposal produced and the hot flue gas that the melting was handled and is handled, and heat utilization rate is high, and the steam output of waste heat recovery step is high, and economic benefits is better.
The utility model discloses in, smuggle secretly in the hot flue gas and have a small amount of not fused flying ash, in gas purification treatment process, this part not fused flying ash is caught again, carries out high temperature melting jointly with the flying ash that incineration disposal step produced and handles to improve the treatment rate of flying ash, improve the innoxious level of system.
After obtaining the slag, the utility model discloses will the slag lets in chilling slag extractor 6 and chills and handles, obtains the melting vitreous body. The present invention has no particular requirement on the specific conditions of the chilling treatment, and may be carried out using conditions well known to those skilled in the art.
Fig. 1 is the utility model provides a structural schematic diagram of the solid useless melting innocent treatment system that burns of organic, fig. 2 is for utilizing the utility model provides a system burns melting innocent treatment's process flow diagram to organic solid useless. The system of the present invention is described in detail below with reference to fig. 1-2: the organic solid waste enters a pretreatment device 1 for pretreatment such as drying and crushing to obtain a pretreatment material; the pretreatment materials and the preheated air enter the circulating fluidized bed incinerator 2 together for incineration treatment, the generated slag is discharged (if the slag is dangerous waste, the slag is crushed and ground and then sent into a high-temperature entrained flow bed for melting treatment, if the slag is not dangerous waste, the slag is buried), the high-temperature flue gas enters the waste heat recovery device 3 for waste heat recovery treatment, softened water and air are introduced into the waste heat recovery device 3, the generated steam is used as a byproduct, and the generated preheated air is introduced into the circulating fluidized bed incinerator 2; the low-temperature flue gas generated by waste heat recovery enters a flue gas purification device 4 for purification, the generated flue gas reaching the standard is discharged, the collected fly ash, fuel and additives are together introduced into a high-temperature entrained flow bed 5 for high-temperature melting treatment, the hot flue gas generated by the high-temperature melting treatment is introduced into a waste heat recovery device 3, and the slag enters a chilling slag extractor 6 for chilling treatment to obtain molten glass, so that the thorough harmless treatment of organic solid waste is realized.
The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments, but they should not be construed as limiting the scope of the present invention.
Example 1
Utilize the utility model discloses an organic solid useless system of burning melting innocent treatment handles the municipal sludge in certain city, and the moisture content of this municipal sludge is 80%, and industrial analysis and elemental analysis are shown as table 1, wherein, organic solid useless structural schematic diagram of system of burning melting innocent treatment is shown as figure 1, and process flow is shown as figure 2, and the preliminary treatment only includes the mummification and handles. The specific treatment process comprises the following steps:
TABLE 1 municipal sludge Industrial analysis and elemental analysis (air-dried basis)
Municipal sludge with the water content of 80% is dried, the water content is reduced to 60%, the heat value is 1500kcal/kg, the grain size is less than or equal to 15mm, the requirement of entering a furnace is met, and crushing and screening treatment is not needed. And (2) sending the dried sludge and preheated air into a circulating fluidized bed incinerator together for incineration treatment to obtain slag and high-temperature flue gas, wherein the hearth temperature of the circulating fluidized bed incinerator is 900 ℃, and the temperature of the high-temperature flue gas is 880 ℃. And (3) recovering the high-temperature flue gas by waste heat to obtain a superheated steam product at 450 ℃, preheated air at 180 ℃ and low-temperature flue gas at 200 ℃. Low temperature flue gasPerforming flue gas purification treatment such as cyclone dust removal, deacidification and cloth bag dust removal to obtain fly ash and standard flue gas. Spraying fly ash, additive and fuel into a high-temperature entrained flow bed through a single burner arranged at the top to carry out incineration melting harmless treatment to obtain slag and hot flue gas, wherein the additive is CaO and Al2O3Without adding SiO2The weight ratio of CaO added is 10%, and the Al is2O3The adding weight ratio is 25%, and the hearth temperature of the high-temperature entrained flow bed is 1200 ℃. Chilling the slag to obtain molten glass, and performing the above treatment of waste heat recovery, gas purification and the like on the hot flue gas and the high-temperature flue gas together to finally realize thorough harmless treatment of the sludge.
Example 2
Utilize the utility model discloses an organic solid useless melting innocent treatment system that burns is handled the domestic waste in certain city, and this domestic waste's original moisture content is 40%, and the moisture content is 32% after the heap is strained, and wet base composition is shown as table 2, wherein, the structural schematic diagram of organic solid useless system that burns melting innocent treatment is shown as figure 1, and process flow is shown as figure 2, and the preliminary treatment includes breakage and screening. The specific treatment process comprises the following steps:
TABLE 2 composition of household garbage (wt%)
The household garbage with the water content of 32 percent after being stacked and filtered is crushed and screened so as to remove the materials such as dregs, glass, metal and the like, the heat value of the pretreated household garbage is 1800kcal/kg, the grain diameter is less than or equal to 14mm, the requirement of charging the household garbage into a furnace is met, and drying treatment is not needed. Feeding the pretreated household garbage and preheated air into a circulating fluidized bed incinerator together for incineration treatment to obtain slag and high-temperature flue gas, wherein the hearth temperature of the circulating fluidized bed incinerator is 850 ℃, and the temperature of the high-temperature flue gas is 840 ℃. And (3) recovering the high-temperature flue gas by waste heat to obtain a saturated steam product at 180 ℃, preheated air at 160 ℃ and low-temperature flue gas at 180 ℃. Rotating the low-temperature flue gasAnd performing flue gas purification treatment such as air dust removal, deacidification, cloth bag dust removal and the like to obtain fly ash and flue gas. Spraying fly ash, an additive and fuel into a high-temperature entrained flow bed through two nozzles symmetrically arranged on the side part to carry out incineration melting harmless treatment to obtain slag and hot flue gas, wherein the additive is Al2O3And SiO2Without addition of CaO, the Al2O315% of SiO in the weight ratio2The adding weight ratio is 20%, and the hearth temperature of the high-temperature entrained flow bed is 1500 ℃. Chilling the slag to obtain molten glass, and performing the above treatment of waste heat recovery, gas purification and the like on the hot flue gas and the high-temperature flue gas together to finally realize the thorough harmless treatment of the household garbage.
Example 3
Utilize the utility model discloses an organic solid useless incineration melting innocent treatment system handles the hazardous waste antibiotic fungus sediment that certain pharmaceutical factory produced, and the moisture content of this antibiotic fungus sediment is 78%, and industrial analysis and elemental analysis are as shown in table 3, wherein, the structural schematic diagram of organic solid useless incineration melting innocent treatment's system is shown in fig. 1, and process flow is shown in fig. 2. The specific treatment process comprises the following steps:
TABLE 3 Industrial and elemental analysis of antibiotic fungi residues
Drying the antibiotic residues with the water content of 78% until the water content is reduced to 15% and the heat value is 3500kcal/kg, then crushing and screening, wherein the grain diameter of the pretreated antibiotic residues is less than or equal to 12mm, and the requirement of charging is met. And (3) feeding the pretreated antibiotic bacterium residues and preheated air into a circulating fluidized bed incinerator together for incineration treatment to obtain furnace slag and high-temperature flue gas, wherein the hearth temperature of the circulating fluidized bed incinerator is 1000 ℃, and the high-temperature flue gas temperature is 950 ℃. And (3) recovering the high-temperature flue gas by waste heat to obtain a saturated steam product at 450 ℃, preheated air at 190 ℃ and low-temperature flue gas at 220 ℃. Cyclone dust removal, deacidification and cloth bag dust removal are carried out on low-temperature smokeAnd (5) gas purification treatment to obtain fly ash and flue gas. Crushing, grinding and other pretreatment of the slag, spraying the slag, fly ash, additives and fuel into a high-temperature entrained flow bed through four burners uniformly arranged at the bottom for incineration, melting and innocent treatment to obtain slag and hot flue gas, wherein the additives are CaO and SiO2Without adding Al2O3The CaO is added in a weight ratio of 20 percent, and the SiO is added in a weight ratio of2The weight ratio of the additive is 10 percent, and the hearth temperature of the high-temperature entrained flow bed is 1600 ℃. Chilling the slag to obtain molten glass, and performing the above treatment of waste heat recovery, gas purification and the like on hot smoke and high-temperature smoke together to finally realize the thorough harmless treatment of the antibiotic bacterium slag.
Can see by above embodiment, the utility model provides a system heat utilization rate is high, it is efficient to burn, and innoxious, minimizing and the resourceful level is high, and product economic benefits is good, and no secondary pollution, and equipment investment is little, does not need complicated crocus preliminary treatment when the flying dust gets into the melting of high temperature entrained flow, easily industrialization popularization and application.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A system for the harmless treatment of the incineration and melting of organic solid wastes is characterized by comprising a pretreatment device (1); the pretreatment device (1) is provided with an organic solid waste inlet and a pretreatment material outlet;
a circulating fluidized bed incinerator (2); the circulating fluidized bed incinerator (2) is provided with a pretreatment material inlet, a preheated air inlet, a slag outlet and a high-temperature flue gas outlet, wherein the pretreatment material inlet is connected with the pretreatment material outlet of the pretreatment device (1);
the waste heat recovery device (3) is provided with a heat exchange flue gas inlet, a softened water inlet, a normal temperature air inlet, a low temperature flue gas outlet, a steam outlet and a preheated air outlet, the heat exchange flue gas inlet is connected with the high temperature flue gas outlet of the circulating fluidized bed incinerator (2), and the preheated air outlet is connected with the preheated air inlet of the circulating fluidized bed incinerator (2);
the flue gas purification device (4) is provided with a low-temperature flue gas inlet, a fly ash outlet and a standard flue gas outlet, and the low-temperature flue gas inlet is connected with the low-temperature flue gas outlet of the waste heat recovery device (3);
the high-temperature entrained flow bed (5) is provided with a fly ash inlet, a fuel inlet, an additive inlet, a slag outlet and a hot flue gas outlet, the fly ash inlet is connected with the fly ash outlet of the flue gas purification device (4), and the hot flue gas outlet is connected with the heat exchange flue gas inlet of the waste heat recovery device (3);
the chilling slag extractor (6) is provided with a slag inlet, a chilling water inlet, a molten glass outlet and a chilling water outlet, and the slag inlet is connected with the slag outlet of the high-temperature entrained flow bed (5).
2. The system according to claim 1, characterized in that the pre-treatment device (1) comprises one or several of a low temperature drying device, a thin layer drying device, a roll crusher and a screen.
3. The system according to claim 1, characterized in that the flue gas cleaning device (4) comprises a bag dust collector or a cyclone.
4. The system according to claim 1, wherein the high temperature entrained flow (5) is further provided with a slag inlet through which the slag produced by the circulating fluidized bed incinerator (2) is introduced into the high temperature entrained flow (5) when the slag is hazardous waste.
5. The system according to claim 1 or 4, characterized in that the feeding mode of the high temperature entrained flow (5) is low temperature burner feeding; the number of the low-temperature burners is one or more.
6. The system according to claim 5, characterized in that the arrangement of the low temperature burners in the high temperature entrained flow (5) is top, side or bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921975073.7U CN211345325U (en) | 2019-11-15 | 2019-11-15 | System for organic solid waste incineration melting innocent treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114485144A (en) * | 2020-10-28 | 2022-05-13 | 杭州正隆环保科技有限公司 | Fly ash and scrap steel cooperative recovery system and device |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114485144A (en) * | 2020-10-28 | 2022-05-13 | 杭州正隆环保科技有限公司 | Fly ash and scrap steel cooperative recovery system and device |
| CN114485144B (en) * | 2020-10-28 | 2024-04-16 | 杭州正隆环保科技有限公司 | System and device for cooperatively recycling fly ash and scrap steel |
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