CN113441529B - Urban waste residue soil recycling system - Google Patents
Urban waste residue soil recycling system Download PDFInfo
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- CN113441529B CN113441529B CN202110797816.1A CN202110797816A CN113441529B CN 113441529 B CN113441529 B CN 113441529B CN 202110797816 A CN202110797816 A CN 202110797816A CN 113441529 B CN113441529 B CN 113441529B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/58—Construction or demolition [C&D] waste
Abstract
The invention relates to the technical field of energy conservation and environmental protection, in particular to a system for recycling urban waste muck, which comprises a waste muck conveying device, wherein the waste muck conveying device is connected with a muck bin through a weighing device, a muck bin unloading platform is arranged on the muck bin, the lower side of the muck bin is connected with an earth and stone impurity removal and separation device, and the earth and stone impurity removal and separation device is connected with a screening, impurity removal and stirring device through a waste receiving device; the engineering sludge warehouse comprises an engineering sludge warehouse and a sludge warehouse, wherein an engineering sludge warehouse unloading platform and a sludge warehouse unloading platform are correspondingly arranged on the engineering sludge warehouse and the sludge warehouse respectively. The invention has the beneficial effects that: the waste muck is classified and stored by the muck bin, the engineering mud bin and the sludge bin, the muck without organic matters and with lower water content enters the muck bin, the river and lake bottom mud and the engineering mud enter the engineering mud bin, and the municipal sludge enters the sludge bin, so that the subsequent treatment efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of energy conservation and environmental protection, in particular to a system for recycling urban waste residue soil.
Background
Along with the great implementation of projects such as the transformation of old city cities, the development of underground spaces of cities (underground commercial streets, underground complexes, underground parking lots and the like), subway construction, urban river and lake treatment, domestic sewage treatment and the like in China, the yield of waste dregs such as construction waste, engineering dregs, engineering mud, river and lake sediment, municipal sludge and the like is increased sharply. Urban waste muck becomes a main source of urban solid waste, the components of the urban waste muck are complex, the traditional disposal mode is difficult and occupies a large amount of land, site disasters are easily induced to be absorbed, the atmospheric, water and soil environmental pollution is caused, the urban environment is damaged, and a 'muck enclosure' becomes an important factor for limiting the sustainable development of cities.
The reason for the 'muck city surrounding' is mainly that the muck has no value for direct utilization except for large production amount. At present, the regeneration and utilization are carried out by preparing sintered bricks, ceramsite, baking-free bricks, regenerated sandstone materials, filling materials and the like. But the synergistic processing capability is insufficient, single materials or a plurality of materials are mostly processed, the materials are difficult to be well combined, and the quality stability of the product is difficult to ensure; meanwhile, the key links such as efficient dehydration, material compatibility, thermal modification (sintering) and the like are not improved sufficiently, and the technical integrity is not sufficient; the complete regeneration, large-volume utilization and better economic value of the waste residue soil are difficult to realize.
The implementation of the prior art at present relieves the dilemma of 'slag soil surrounding city' to a certain extent. But the recycling of the waste residue soil is a comprehensive technology relating to classification compatibility, dehydration and drying, thermal modification and curing molding; meanwhile, the requirements of large-volume utilization, full-scale utilization, multipurpose consumption, no secondary pollution, environmental protection, economy, high efficiency and the like are required to be met. Therefore, it is an urgent problem to integrate the existing technologies and develop new processing technologies to form a new and highly integrated technical system based on the existing technologies.
Disclosure of Invention
Aiming at the problem, the invention provides an urban waste muck recycling system which comprises a waste muck conveying device, wherein the waste muck conveying device is connected with a muck bin through a weighing device, a muck bin unloading platform is arranged on the muck bin, the lower side of the muck bin is connected with an earth and stone impurity removal and separation device, and the earth and stone impurity removal and separation device is connected with a screening impurity removal stirring device through a waste receiving device; the engineering mud bin and the sludge bin are respectively and correspondingly provided with an engineering mud bin unloading platform and a sludge bin unloading platform, the engineering mud bin and the sludge bin are connected with the screening, impurity-removing and stirring device through inclined guide plates, and the screening, impurity-removing and stirring device is connected with a mud pool through a pipeline stirrer; the device also comprises a dewatering device, two ends of the dewatering device are connected with the mud pit through pipelines, and a first water pump is arranged on the pipeline on one side;
a fifth belt conveyor is arranged below the dehydration device, a temporary storage tank is arranged below the fifth belt conveyor, a muck crushing device is connected to the lower side of the temporary storage tank, and the muck crushing device is connected with an airflow crushing device through an airflow crushing feeding device; the soil and stone impurity removal and separation device is connected with a crushed residue and soil bin through a pipeline, a sixth belt conveyor is arranged on the lower side of the crushed residue and soil bin, and one end, far away from the crushed residue and soil bin, of the sixth belt conveyor is located right above the temporary storage tank;
the cyclone drying and preheating device is connected with the bottom of the airflow crushing device through a pipeline, and the lower end of the cyclone drying and preheating device is connected with a material collector;
a hot air circulating device is arranged in the residue soil bin, the hot air circulating device is connected with a second induced draft fan through a pipeline, the second induced draft fan is connected with a cyclone separation device through a third gas-water separation device, and the cyclone separation device is respectively connected with the airflow crushing device and the cyclone drying and preheating device through pipelines;
the thermal modification device is characterized by also comprising a thermal modification device, wherein a combustion chamber is arranged at the lower side of the thermal modification device, and the material collector is connected with the thermal modification device through a feeding device of the thermal modification device; the thermal modification device is connected with a heat exchanger through a heat exchanger feeding device;
the screening, impurity removing and stirring device is connected with an aggregate washing device through a pipeline, an aggregate crushing device is arranged below the aggregate washing device and connected with an aggregate bin, a third belt conveyor is arranged below the aggregate bin and connected with a massive building material production device;
the heat exchanger is connected with a thermal modification powder bin, the thermal modification powder bin is connected with a second belt conveyor through a seventh belt conveyor, and the second belt conveyor is connected with the block building material production device; the seventh belt conveyor is further connected with an eighth belt conveyor, the eighth belt conveyor is connected with a filler preparation device, and the lower side of the crushed slag soil bin is connected with the filler preparation device through the first belt conveyor.
The invention adopts the following further technical scheme: a bottom heating device is arranged in the muck bin, and a turning device is arranged in the muck bin; and the side wall of the muck bin is also connected with a tail gas treatment device.
The invention adopts the following further technical scheme: and the pipeline stirrer is connected with an automatic powder adding device and an automatic water aqua adding device.
The invention adopts the following further technical scheme: a stirrer guide rail is arranged in the slurry tank, a stirring device is arranged on the stirrer guide rail, and a slurry pump is arranged on a pipeline connected with the pipeline stirrer and the slurry tank.
The invention adopts the following further technical scheme: and a pipeline for connecting the cyclone drying preheating device with the airflow crushing device is provided with a gas pressurizing device, a first gas-water separation device and a first induced draft fan.
The invention adopts the following further technical scheme: an exhaust valve is arranged on the material collector.
The invention adopts the following further technical scheme: the bottom of the thermal modification device is connected with a fuel supply device.
The invention adopts the following further technical scheme: the block building material production device is also connected with an additional bin through a fourth belt conveyor.
The invention adopts the following further technical scheme: the slag-soil bin is characterized by also comprising a condensed water collecting tank, wherein the condensed water collecting tank is connected with a condensing device through a pipeline, and the condensing device is positioned in the slag-soil bin; the condensed water collecting tank is connected with a waste heat utilization device through a second water pump; the dewatering device is respectively communicated with the condensed water collecting tank and the automatic water agent adding device through a water treatment device.
The invention adopts the following further technical scheme: the heat exchanger is internally provided with an air preheating device, the air preheating device is connected with a second air-water separation device through a second air feeder, the second air-water separation device is communicated with the engineering slurry bin through a pipeline, and the heat exchanger is further connected with a third air feeder.
The invention has the beneficial effects that:
1. the waste muck is classified and stored by the muck bin, the engineering mud bin and the sludge bin, muck without organic matters and with low water content enters the muck bin, river and lake bottom mud and engineering mud enter the engineering mud bin, and municipal sludge enters the sludge bin, so that the subsequent treatment efficiency is greatly improved;
2. the muck bin adopts a transparent ceiling, solar energy can be fully utilized, a heating device, a turnover device and a hot air circulating device are arranged in the muck bin, and a condensing device is arranged to separate moisture in the air in time, so that the drying efficiency of muck is greatly improved;
3. the soil and stone impurity removal separation device and the screening impurity removal stirring device effectively remove plastics, wood blocks and fibers in the residue soil, and are convenient for subsequent treatment and resource utilization;
4. cooling the high-temperature material modified by the thermal modification device by using a heat exchanger, sequentially feeding the waste heat of the material and the waste heat of tail gas of a combustion chamber into a cyclone drying and preheating device, an airflow crushing device, a heating device of a residue soil bin and a hot air circulating device, and performing gradient full utilization on the waste heat;
5. the engineering mud and the sludge are mixed according to an optimized proportion through the unloading control devices of the engineering mud bin and the sludge bin, the agents of the automatic powder adding device and the automatic water agent adding device are uniformly mixed with the mud through the pipeline stirrer, and meanwhile, the mud tank is provided with the stirring device, so that the agents and the mud are further uniformly mixed and fully reacted, the dehydration effect of the dehydration device is ensured and the dehydration device stably operates, the engineering mud and the sludge are dehydrated after being mixed, the use of the agents is reduced, and the dehydration cost is reduced;
6. the slurry is subjected to three-stage deep dehydration and drying through the dehydration device, the airflow crushing device, the cyclone separation device and the cyclone drying and preheating device, so that the dehydration and drying cost is greatly reduced; meanwhile, the airflow crushing device is matched with the cyclone separation device, so that the water heavy in clay can be separated in a water mist mode, and the drying energy consumption is greatly reduced as compared with direct heat energy evaporation;
7. the slag soil enters a thermal modification device in a powder form for thermal modification, and compared with the traditional sintered bricks and ceramsite, the thermal modification device has the advantages of short action time and low modification temperature (the sintering temperature of the sintered bricks is generally 900-class temperature and 1000 ℃, the treatment time is 2-3 hours, the sintering temperature of the ceramsite is 1100-class temperature and 1200 ℃, the treatment time is generally 30-35min, the process temperature is 600-class temperature and 900 ℃, and the firing time is 15-30 min); the thermal modification device forms an anoxic environment, the organic components of the muck form combustible gas which enters the combustion chamber to be fully combusted, heat energy is provided for the thermal modification device, the organic matters are intercepted into the thermal modification material in a carbon form, carbon emission is reduced, and meanwhile, organic carbon is beneficial to improving the engineering performance of the thermal modification material; the energy consumption of the whole process can be greatly reduced by utilizing the organic components in the sludge and the river and lake bottom sludge;
8. the quick lime adopted by the powder automatic adding device is finally left in the thermal modification material and can be used as an alkali excitation material, so that the engineering performance of the thermal modification material is improved;
9. air required by the combustion chamber is extracted from the engineering sludge bin and the sludge bin through a second air feeder, so that a negative pressure environment is formed between the engineering sludge bin and the sludge bin, no odor is overflowed, the extracted air enters the combustion chamber after being preheated through an air preheating device arranged on a heat exchanger, the preheated air can improve the combustion efficiency, and meanwhile, the odor in the air is combusted through the combustion chamber to be treated, and finally, the odor is finally treated through a tail gas treatment device and is discharged after reaching the standard;
10. one part of water generated by the dehydration device directly enters the mud pool for adjusting the water content of the mud, and the other part of the water is supplied to the automatic water agent adding device and enters the condensed water collecting pool after being processed by the water processing device; the condensed water is collected by the condensing device, the first gas-water separation device, the second gas-water separation device and the third gas-water separation device and enters the condensed water collecting tank, one part of the condensed water in the condensed water collecting tank is supplied to the automatic water agent adding device through the waste heat utilization device, so that the preparation efficiency of the medicament is improved, and the other part of the condensed water is supplied to the filler preparation device and the blocky building material production device to be used as water for product production and product maintenance; the whole system realizes water recycling and zero emission;
11. part of the waste residue soil enters a residue soil bin, is dried and directly used as a raw material to be supplied to a filler preparation device for producing the filler; the engineering mud, the sludge and the like are subjected to processes such as dehydration and the like, and finally are treated by a thermal modification device to form a thermal modification material which is used as a raw material for a filler preparation device and a massive building material production device product and can also be directly used as a raw material for external supply; greatly improves the application range of the waste residue soil regeneration material.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the urban waste residue soil recycling system.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
With reference to fig. 1, in an embodiment of the present invention, an urban waste residue soil recycling system includes a waste residue soil transportation device 15, where the waste residue soil transportation device 15 is one of a residue soil transportation vehicle or a slurry transportation vehicle, the waste residue soil transportation device 15 is connected to a residue soil bin 18 through a weighing device 16, a residue soil bin discharging platform 17 is disposed on the residue soil bin 18, a soil and stone impurity removing and separating device 11 is connected to a lower side of the residue soil bin, the soil and stone impurity removing and separating device 11 is connected to a screening impurity removing stirring device 24 through a waste receiving device 21, and the soil and stone impurity removing and separating device 11 and the screening impurity removing stirring device 24 effectively remove plastics, wood blocks and fibers in residue soil, so as to facilitate subsequent treatment and resource utilization;
the device is characterized by further comprising an engineering slurry bin 23 and a sludge bin 26, wherein the engineering slurry bin 23 and the sludge bin 26 are respectively and correspondingly provided with an engineering slurry bin discharging platform 22 and a sludge bin discharging platform 25, the engineering slurry bin 23 and the sludge bin 26 are connected with the screening, impurity-removing and stirring device 24 through inclined guide plates, and the screening, impurity-removing and stirring device 24 is connected with a slurry pool 33 through a pipeline stirrer 28; the device also comprises a dewatering device 34, wherein two ends of the dewatering device 34 are connected with the mud pit 33 through pipelines, and a first water pump 35 is arranged on a pipeline on one side;
the waste muck is classified and stored by the muck bin 18, the engineering mud bin 23 and the mud bin 26, muck without organic matters and with low water content enters the muck bin 18, river and lake bottom mud and engineering mud enter the engineering mud bin 23, and municipal sludge enters the mud bin 26, so that the subsequent treatment efficiency is greatly improved;
a fifth belt conveyor 37 is arranged below the dehydration device 34, a temporary storage tank 40 is arranged below the fifth belt conveyor 37, a muck crushing device 41 is connected to the lower side of the temporary storage tank 40, and the muck crushing device 41 is connected with an airflow crushing device 43 through an airflow crushing feeding device 42; the soil and stone impurity removal and separation device 11 is connected with a crushed slag-soil bin 3 through a pipeline, a sixth belt conveyor 38 is arranged on the lower side of the crushed slag-soil bin 3, and one end, far away from the crushed slag-soil bin 3, of the sixth belt conveyor 38 is positioned right above the temporary storage tank 40;
the cyclone drying and preheating device 50 is further included, the cyclone drying and preheating device 50 is connected with the bottom of the airflow crushing device 43 through a pipeline, and the lower end of the cyclone drying and preheating device 50 is connected with a material collector 51;
a hot air circulating device 13 is arranged in the slag soil bin 18, the hot air circulating device 13 is connected with a second induced draft fan 65 through a pipeline, the second induced draft fan 65 is connected with a cyclone separation device 39 through a third gas-water separation device 58, and the cyclone separation device 39 is respectively connected with the airflow crushing device 43 and the cyclone drying and preheating device 50 through pipelines;
the device also comprises a thermal modification device 55, a combustion chamber 54 is arranged at the lower side of the thermal modification device 55, and the material collector is connected with the thermal modification device 55 through a thermal modification device feeding device 53; the thermal modification device 55 is connected with a heat exchanger 63 through a heat exchanger feeding device 59;
the muck enters a thermal modification device 55 in a powder form for thermal modification, and compared with the traditional sintered brick and ceramsite, the method has the advantages of short action time and low modification temperature, the sintering temperature of the sintered brick is generally 900-; the sintering temperature of the ceramsite is 1100-; the temperature of the process is 600-900 ℃, and the firing time is 15-30 min; the thermal modification device 55 forms an anoxic environment, the organic components of the residue soil form combustible gas which enters the combustion chamber 54 to be fully combusted, heat energy is provided for the thermal modification device 55, the organic matters are intercepted into the thermal modification material in a carbon form, carbon emission is reduced, and meanwhile, organic carbon is beneficial to improving the engineering performance of the thermal modification material; the energy consumption of the whole process can be greatly reduced by utilizing the organic components in the sludge and the river and lake bottom sludge;
the screening, impurity removing and stirring device 24 is connected with an aggregate washing device 9 through a pipeline, an aggregate crushing device 8 is arranged below the aggregate washing device 9, the aggregate crushing device 8 is connected with an aggregate bin 4, a third belt conveyor 5 is arranged below the aggregate bin 4, and the third belt conveyor 5 is connected with a massive building material production device 6;
the heat exchanger 63 is connected with a thermal modified powder bin 64, the thermal modified powder bin 64 is connected with a second belt conveyor 2 through a seventh belt conveyor 66, and the second belt conveyor 2 is connected with the block building material production device 6; the seventh belt conveyor 66 is also connected with an eighth belt conveyor 67, the eighth belt conveyor 67 is connected with a filler preparation device 68, the lower side of the crushed muck bin 3 is connected with the filler preparation device 68 through the first belt conveyor 1, the high-temperature material modified by the thermal modification device 55 is cooled by using a heat exchanger 63, the waste heat of the material and the waste heat of the tail gas of the combustion chamber 54 sequentially enter the cyclone drying preheating device 50, the airflow crushing device 43, the heating device 12 of the muck bin 18 and the hot air circulating device 13, and the waste heat is fully utilized in a gradient manner;
a bottom heating device 12 is arranged in the slag-soil bin 18, and a turnover device 19 is arranged in the slag-soil bin 18; the side wall of the muck bin 18 is also connected with a tail gas treatment device 20, a transparent ceiling is arranged at the top of the muck bin 18, and the muck bin 18 adopts the transparent ceiling, so that solar energy can be fully utilized; a heating device 12, a turning and raking device 19 and a hot air circulating device 13 are arranged in the residue soil bin 18, and a condensing device 14 is arranged to separate moisture in the air in time, so that the residue soil drying efficiency is greatly improved;
the pipeline stirrer 28 is connected with an automatic powder adding device 27 and an automatic water aqua adding device 29, engineering mud and sludge are mixed according to an optimized proportion through the unloading control devices of the engineering mud bin 23 and the sludge bin 26, agents of the automatic powder adding device 27 and the automatic water aqua adding device 29 are uniformly mixed with the mud through the pipeline stirrer 28, meanwhile, a stirring device 31 is arranged in a mud tank 33, the agents and the mud are further uniformly mixed and fully reacted, the dehydration effect and stable operation of the dehydration device 34 are further guaranteed, the engineering mud and the sludge are dehydrated after being mixed, the use of the agents is reduced, and the dehydration cost is reduced; the quicklime adopted by the powder automatic adding device 27 is finally left in the thermal modification material and can be used as an alkali excitation material to improve the engineering performance of the thermal modification material;
a stirrer guide rail 32 is arranged in the slurry tank 33, a stirring device 31 is arranged on the stirrer guide rail 32, and a slurry pump 30 is arranged on a pipeline connecting the pipeline stirrer 28 and the slurry tank.
And a pipeline for connecting the cyclone drying preheating device 50 with the airflow crushing device 43 is provided with a gas pressurizing device 44, a first gas-water separation device 47 and a first induced draft fan 49.
The collector 51 is provided with an exhaust valve 52. The fuel supply device 56 is connected to the bottom of the thermal reforming device 55.
The block building material production device 6 is also connected with an additional feed bin 10 through a fourth belt conveyor 7.
The device also comprises a condensed water collecting tank 48, wherein the condensed water collecting tank 48 is connected with the condensing device 14 through a pipeline, and the condensing device 14 is positioned in the residue soil bin 18; the condensed water collecting tank 48 is connected with a waste heat utilization device 45 through a second water pump 46; the dehydration device 34 is respectively communicated with the condensed water collecting tank 48 and the automatic water agent adding device 29 through a water treatment device 36.
An air preheating device 61 is arranged in the heat exchanger 63, the air preheating device 61 is connected with a second air-water separation device 57 through a second air feeder 60, the second air-water separation device 57 is communicated with the engineering slurry bin 23 through a pipeline, and a third air feeder 62 is further connected to the heat exchanger 63.
When the sludge treatment device works specifically, the sludge without organic matters and with lower water content enters the sludge bin 18 through the sludge bin discharging platform 17, the bottom sludge and the engineering slurry of rivers and lakes enter the engineering slurry bin through the engineering slurry discharging platform 22, and the municipal sludge enters the sludge bin 26 through the sludge bin discharging platform 25;
at the moment, the residue soil without organic matters and with low water content is dried by the heating device 12, the overturning and raking device 19, the hot air circulating device 13 and the solar energy of the transparent ceiling arranged on the residue soil bin 18, and redundant gas in the residue soil bin 18 enters the tail gas treatment device 20 to reach the standard and then is discharged;
after being dried, the muck and the sludge enter a muck and stone impurity removal and separation device 11, the plastics, wood blocks and fibers in the muck enter a waste material receiving device 21, the soil enters a crushed muck bin 3, the crushed stones enter an aggregate washing device 9, water for washing comes from a water treatment device 36 and a condensed water collecting tank 48, the water treatment device 36 treats water of a dehydration device 34, and the condensed water collecting tank 48 collects condensed water of a condensing device 14, a first gas-water separation device 47, a second gas-water separation device 57 and a third gas-water separation device 58; after washing, the aggregate enters an aggregate crushing device 8 for crushing, and then enters an aggregate bin 4; the water and the slurry after washing enter a screening, impurity removing and stirring device 24;
engineering mud and sludge enter a screening, impurity removing and stirring device 24 through a discharge control device of an engineering mud bin 23 and a discharge control device of a sludge bin 26 according to a set proportion, plastic, wood blocks and fibers in the dregs enter a waste receiving device 21, the rest mud enters a mud tank 33 through a mud pump 30, a pipeline stirrer 28 is arranged between the screening, impurity removing and stirring device 24 and the mud pump 30, and a dewatering agent is added into the pipeline stirrer 28 through an automatic powder adding device 27 and an automatic water agent adding device 29; the mud tank 33 fully stirs the mud through a stirring device 31 arranged on a stirrer guide rail 32, the stirred mud enters a dehydration device 34, part of dehydrated mud directly returns to the mud tank 33 through a first water pump 35, the other part of dehydrated mud enters a water treatment device 36, and the dehydrated mud cake enters a temporary storage tank 40 through a fifth belt conveyor 37;
part of the dregs in the crushed dregs bin 3 is conveyed to a temporary storage tank 40 through a sixth belt conveyor 38, the dregs in the temporary storage tank 40 enter a dregs crushing device 41, the crushed dregs enter an airflow crushing device 43 through an airflow crushing feeding device 42, the mixture after airflow crushing is introduced into a cyclone separation device 39 through a second induced draft fan 65, the separated powder enters a cyclone drying preheating device 50, the preheated powder, gas enter a first airflow separation device 47 through a first induced draft fan 49, condensed water enters a condensed water collecting tank 48, and the gas enters a gas pressurizing device 44 and is pressurized and then supplied to the airflow crushing device 43; the heating gas used by the cyclone drying preheating device 50 is the gas after the third blower 62 sends the heat exchange gas into the heat exchanger 63 and the tail gas of the combustion chamber 54; air required by the combustion chamber 54 is extracted from the engineering sludge bin 23 and the sludge bin 26 by a second air blower 60, moisture is separated by a second gas-water separation device 57, the air is sent to an air preheating device 61 in a heat exchanger 63 for preheating, and then the air enters the combustion chamber 54, and the moisture separated by the second gas-water separation device 57 enters a condensed water collecting tank 48; the gas of the second induced draft fan 65 is input into the bottom heating device 12 and the hot air circulating device 13 in the muck bin 18 to dry the muck;
the powder preheated by the cyclone drying preheating device 50 enters the material collector 51, is input into the thermal modification device 55 through the feeding device 53 of the thermal modification device, enters the heat exchanger 63 through the feeding device 59 of the heat exchanger after being subjected to thermal modification, enters the thermal modification powder bin 64 after being subjected to heat exchange and cooling, the material collector 51 is provided with an exhaust valve 52, the air in the material collector 51 is exhausted, and the air entering the thermal modification device 55 is reduced as much as possible;
the thermal reforming device 55 is supplied with heat from the combustion chamber 54, and the fuel is supplied from the fuel supply device 56 and the combustible gas produced by the thermal reforming device 55;
the tail gas of the combustion chamber 54 enters the cyclone drying and preheating device 50 after heat exchange through the waste heat utilization device 45; air required by the combustion chamber 54 is extracted from the engineering sludge bin 23 and the sludge bin 26 through the second air feeder 60, so that a negative pressure environment is formed between the engineering sludge bin 23 and the sludge bin 26, no odor is overflowed, the extracted air enters the combustion chamber 54 after being preheated through an air preheating device 61 arranged on a heat exchanger 63, the preheated air can improve the combustion efficiency, meanwhile, the odor in the air is combusted and treated through the combustion chamber 54, and finally the odor is subjected to final treatment by the tail gas treatment device 38 and is discharged after reaching the standard;
the water of the waste heat utilization device 45 comes from a condensed water collecting tank 48, and is conveyed to an automatic water agent adding device 29 after heat exchange to be used as water for agent preparation;
the material of the aggregate bin 4 passes through the third belt conveyor 5, the material of the additional bin 10 passes through the fourth belt conveyor 7, the material of the thermal modification powder bin 64 passes through the seventh belt conveyor 66 and the eighth belt conveyor 67 and is conveyed to the massive building material production device 6 for product production, the material of the crushed muck bin 3 passes through the first belt conveyor 1, the material of the thermal modification powder bin 64 passes through the seventh belt conveyor 66 and the second belt conveyor 2 and is conveyed to the filler preparation device 68 for product production, and water for product production and product maintenance is supplied by the water treatment device 36 and the condensate water collecting tank 48.
A part of water generated by the dehydration device 34 directly enters the mud tank 33 for adjusting the water content of the mud, and a part of water is supplied to the automatic water agent adding device 29 and enters the condensed water collecting tank 48 after being processed by the water processing device 36; the condensing device 14, the first gas-water separation device 47, the second gas-water separation device 57 and the third gas-water separation device 58 collect condensed water and enter the condensed water collecting tank 48, a part of the condensed water in the condensed water collecting tank 48 is supplied to the automatic water agent adding device 29 through the waste heat utilization device 45, so that the preparation efficiency of the medicament is improved, and the other part of the condensed water is supplied to the filler preparation device 68 and the block building material production device 6 to be used as water for product production and product maintenance; the whole system realizes water recycling and zero emission;
part of the waste residue soil enters the residue soil bin 18 and is dried, and then is directly used as a raw material to be supplied to the filler preparation device 68 for producing the filler; the engineering mud, the sludge and the like are subjected to processes such as dehydration and the like, and finally are treated by a thermal modification device 55 to form a thermal modification material which is used as a raw material of a filler preparation device 68 and a massive building material production device 6, and can also be directly used as a raw material to be supplied to the outside; the application range of the waste residue soil regeneration material is greatly improved;
in the invention, each device of the treatment system is periodically checked in the system operation process, equipment which does not meet the requirements of the treatment system and the existing potential safety hazard is replaced in time, the safe operation of the treatment system is ensured, and the system is cleaned and maintained in time after being stopped, so that the next smooth operation and the service life of the treatment system are ensured.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. The urban waste residue soil recycling system comprises a waste residue soil conveying device (15) and is characterized in that the waste residue soil conveying device (15) is connected with a residue soil bin (18) through a weighing device (16), a residue soil bin unloading platform (17) is arranged on the residue soil bin (18), the lower side of the residue soil bin is connected with an earth and stone impurity removal and separation device (11), and the earth and stone impurity removal and separation device (11) is connected with a screening, impurity removal and stirring device (24) through a waste material receiving device (21); the engineering sludge bin (23) and the sludge bin (26) are respectively and correspondingly provided with an engineering sludge bin unloading platform (22) and a sludge bin unloading platform (25), the engineering sludge bin (23) and the sludge bin (26) are connected with the screening, impurity-removing and stirring device (24) through inclined guide plates, and the screening, impurity-removing and stirring device (24) is connected with a sludge pool (33) through a pipeline stirrer (28); the device also comprises a dewatering device (34), two ends of the dewatering device (34) are connected with the mud pit (33) through pipelines, and a first water pump (35) is arranged on a pipeline on one side;
a fifth belt conveyor (37) is arranged below the dehydration device (34), a temporary storage tank (40) is arranged below the fifth belt conveyor (37), a muck crushing device (41) is connected to the lower side of the temporary storage tank (40), and the muck crushing device (41) is connected with an airflow crushing device (43) through an airflow crushing feeding device (42); the soil and stone impurity removal and separation device (11) is connected with a crushed slag-soil bin (3) through a pipeline, a sixth belt conveyor (38) is arranged on the lower side of the crushed slag-soil bin (3), and one end, far away from the crushed slag-soil bin (3), of the sixth belt conveyor (38) is located right above the temporary storage tank (40);
the cyclone drying and preheating device (50) is further included, the cyclone drying and preheating device (50) is connected with the bottom of the airflow crushing device (43) through a pipeline, and the lower end of the cyclone drying and preheating device (50) is connected with a material collector (51);
a hot air circulating device (13) is arranged in the residue soil bin (18), the hot air circulating device (13) is connected with a second induced draft fan (65) through a pipeline, the second induced draft fan (65) is connected with a cyclone separating device (39) through a third gas-water separating device (58), and the cyclone separating device (39) is respectively connected with the airflow crushing device (43) and the cyclone drying and preheating device (50) through pipelines;
the device also comprises a thermal modification device (55), a combustion chamber (54) is arranged at the lower side of the thermal modification device (55), and the material collector is connected with the thermal modification device (55) through a thermal modification device feeding device (53); the thermal modification device (55) is connected with a heat exchanger (63) through a heat exchanger feeding device (59);
the screening, impurity removing and stirring device (24) is connected with an aggregate washing device (9) through a pipeline, an aggregate crushing device (8) is arranged below the aggregate washing device (9), the aggregate crushing device (8) is connected with an aggregate bin (4), a third belt conveyor (5) is arranged below the aggregate bin (4), and the third belt conveyor (5) is connected with a block building material production device (6);
the heat exchanger (63) is connected with a thermal modified powder bin (64), the thermal modified powder bin (64) is connected with a second belt conveyor (2) through a seventh belt conveyor (66), and the second belt conveyor (2) is connected with the block building material production device (6); seventh belt feeder (66) still is connected with eighth belt feeder (67), and eighth belt feeder (67) is connected with filler preparation facilities (68), crushing dregs storehouse (3) downside through first belt feeder (1) with filler preparation facilities (68) link to each other.
2. The recycling system of urban waste residue soil according to claim 1, wherein a bottom heating device (12) is arranged in the residue soil bin (18), and a turnover device (19) is arranged in the residue soil bin (18); and the side wall of the slag-soil bin (18) is also connected with a tail gas treatment device (20).
3. The recycling system of urban waste residue soil according to claim 1, wherein an automatic powder adding device (27) and an automatic water agent adding device (29) are connected to the pipeline agitator (28).
4. The recycling system of urban waste residue soil according to claim 1, wherein a mixer rail (32) is arranged in the slurry tank (33), a mixer (31) is arranged on the mixer rail (32), and a slurry pump (30) is arranged on a pipe connecting the pipe mixer (28) and the slurry tank.
5. The system for recycling urban waste residue soil according to claim 1, wherein a gas pressurizing device (44), a first gas-water separation device (47) and a first induced draft fan (49) are arranged on a pipeline connecting the cyclone drying preheating device (50) and the jet milling device (43).
6. The recycling system of urban waste residue soil according to claim 1, wherein the collector (51) is provided with a vent valve (52).
7. The system for recycling municipal waste residue soil according to claim 1, wherein a fuel supply (56) is connected to the bottom of the thermal modification device (55).
8. The system for recycling urban waste residue soil according to claim 1, wherein the block building material production device (6) is further connected to an additional bin (10) through a fourth belt conveyor (7).
9. The municipal waste residue soil recycling system according to claim 3, further comprising a condensate water collection tank (48), wherein the condensate water collection tank (48) is connected to the condensing means (14) via a pipe, and wherein the condensing means (14) is located in the residue soil bin (18); the condensed water collecting tank (48) is connected with a waste heat utilization device (45) through a second water pump (46); the dehydration device (34) is respectively communicated with the condensed water collecting tank (48) and the automatic water agent adding device (29) through a water treatment device (36).
10. The system for recycling urban waste residue soil according to claim 1, wherein an air preheating device (61) is arranged in the heat exchanger (63), the air preheating device (61) is connected with a second gas-water separation device (57) through a second blower (60), the second gas-water separation device (57) is communicated with the engineering slurry bin (23) through a pipeline, and a third blower (62) is further connected to the heat exchanger (63).
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