CN209797735U - Municipal sludge pyrolysis treatment device - Google Patents
Municipal sludge pyrolysis treatment device Download PDFInfo
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- CN209797735U CN209797735U CN201821522441.8U CN201821522441U CN209797735U CN 209797735 U CN209797735 U CN 209797735U CN 201821522441 U CN201821522441 U CN 201821522441U CN 209797735 U CN209797735 U CN 209797735U
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- municipal sludge
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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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Abstract
the utility model discloses a whole airtight negative pressure, can solidify dirty heavy metal, avoid secondary pollution's municipal sludge pyrolysis treatment device to overcome municipal sludge traditional treatment method and easily cause secondary pollution's defect once more. Simultaneously discloses a municipal sludge pyrolysis treatment complete process adopting the device, which comprises the following procedures: thermal refining and separating process, pyrolysis and carbonization process and tail gas treatment process. The utility model can realize the resource utilization of the municipal sludge, can realize the cyclic development of 'treating waste with waste', and can lead the municipal sludge to obtain energy for recycling and reduce external energy; the whole process can realize heat balance and avoid secondary pollution to the environment.
Description
Technical Field
The utility model belongs to the technical field of solid waste handles, concretely relates to utilize pyrolysis principle to handle municipal sludge and realize that three-phase separation reaches the device that the environmental protection dealt with the effect.
Background
Along with the rapid development of Chinese economy and the deepening of urbanization process, the municipal production, the domestic sewage treatment capacity and the sewage treatment rate are continuously improved, and the municipal sludge yield of a sewage treatment plant is increased. However, in the development course of sewage treatment in China, although municipal sludge treatment should be one of the important links in the sewage treatment process, due to the long-term understandings and neglects, the municipal sludge treatment problem, which should account for 10% -20% of the sewage treatment cost, is left for a long time.
The environmental pollution dilemma that the historical problem of leaving over makes municipal sludge cause is more and more serious, and at present that water pollution is serious day by day, water environment worsens day by day, the sewage treatment system that lacks municipal sludge safety and deals with the consideration is incomplete, also can't satisfy the environmental objective requirement. The problem of secondary pollution caused by municipal sludge is obvious day by day, the problem of innocent treatment and disposal of the municipal sludge is not negligible and is not slow, and the problem of safe disposal of the municipal sludge is urgently needed to be solved.
the most direct reason for the treatment of municipal sludge is its secondary pollution, and municipal sludge may contain adsorbable halides, dihexyl phthalate (DEHP), linear alkylbenzene sulfonate, Polycyclic Aromatic Hydrocarbons (PAHs), nonylphenol (NP/NPE), polychlorinated biphenyl (PCB), polychlorinated dioxin (PCDD), polychlorinated benzofurans (PCDF), and natural volatilization or chemical reaction to generate other compounds into the atmosphere, which directly causes atmospheric pollution and increase of haze weather if the municipal sludge cannot be properly treated.
Municipal sludge which is not properly treated may contain heavy metals and various pathogenic bacteria, secondary pollution of soil, water and the like can be caused by irregular landfill, dumping or utilization, and poor or unknown traders are applied to farmlands as organic fertilizers and directly enter the food chain of the people to cause diseases and even cancers, and the subsequent fruits are simply the surprise of eyes.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art's the aforesaid not enough, provide a three-phase separation that can realize sludge treatment's liquid phase, gaseous phase, solid-phase, appear the innoxious municipal sludge pyrolysis treatment device of processing procedure of triphase thing to overcome municipal sludge traditional treatment method and easily cause secondary pollution's defect once more.
in order to solve the above problem, the utility model adopts the following technical scheme: the utility model provides a municipal administration sludge pyrolysis treatment device, is including the feed arrangement who is used for the material loading, be used for carrying out preliminary treatment's thermal refining device to municipal administration sludge, carry out the pyrolysis carbomorphism device of pyrolysis to semi-dried sludge, carry out the heating device of heat supply and carry out tail gas treatment's tail gas treatment device to whole device for whole device.
The following is the utility model discloses to the further optimization of above-mentioned scheme: hot quenching and tempering device is including the heat conduction chamber that can heat municipal sludge, is provided with the agitator in the heat conduction intracavity.
further optimization: the stirrer comprises a spiral stirring blade arranged along the length direction of the heat conducting cavity.
further optimization: and a water vapor discharge port is connected to the stirrer.
Further optimization: the pyrolysis carbonization device comprises a rotary drum, and a heat-insulating layer is arranged on the rotary drum.
Further optimization: and a heat conduction cavity of the pyrolysis carbonization reactor is arranged between the heat preservation layer and the roller, and the heat conduction cavity of the pyrolysis carbonization reactor is connected with a burner.
Further optimization: and the inside of the roller is provided with a helical blade which is arranged along the length direction of the roller.
The utility model discloses the beneficial effect who produces does: 1. the utility model integrates three processes of thermal conditioning separation, pyrolysis carbonization and tail gas treatment by the process modes of sectional treatment, directional adjustment, accurate control and cooperative treatment, changes the traditional extensive treatment mode of the original municipal sludge, adopts core processes such as pyrolysis and the like, and the pyrolysis process treats the municipal sludge to obtain energy for recycling, thereby reducing external energy; the whole process can realize heat balance, and avoid the problem of secondary pollution to the environment;
2. the leaching property of heavy metal of the sludge solid product (sludge-based biochar) treated by the process is obviously reduced compared with that of the original sludge, under the condition that the proportion of a detected substance and the leaching time are increased, copper, nickel, lead, cadmium and chromium are not detected, the detection of arsenic is 0.0386mg/L, the detection value of zinc is 0.107mg/L, and the detection result is obviously superior to the requirement of sludge treatment in the sludge treatment standard of the sewage treatment plant in cities and towns;
3. The municipal sludge-based biochar after innocent treatment can be used as a landscaping base fertilizer raw material and a soil improvement material, so that the resource utilization of municipal sludge is realized;
4. the utility model discloses after the industrialization, can realize the cyclic development of "treating waste with waste", provide operable technology and innovation mode to the innoxious utilization of resources of china's mud.
The present invention will be further explained with reference to the drawings and examples.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic structural view of a thermal conditioning apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a pyrolysis carbonization reactor in an embodiment of the present invention.
in the figure: 1-a water vapor discharge port; 2-a feed inlet; 3-discharging port; 4-a transmission shaft; 5-a stirrer; 6-heat conducting cavity; 7-a feeding hole of the pyrolysis carbonization reactor; 8-a burner; 9-a flue gas outlet; 10-a heat-insulating layer; 11-a heat conducting cavity of the pyrolysis carbonization reactor; 12-a reaction zone; 13-a transmission gear; 14-discharge hole of pyrolysis carbonization reactor; 15-a support wheel; 16-a reactor housing; 17-a roller; 18-helical blades.
Detailed Description
In the embodiment, as shown in fig. 1 to 3, a municipal sludge pyrolysis treatment device comprises a feeding device for feeding, a thermal conditioning device for performing primary treatment on municipal sludge, a pyrolysis carbonization device for performing pyrolysis on semi-dried sludge, a heat supply device for supplying heat to the whole device, and a tail gas treatment device for performing tail gas treatment on the whole device.
The feeding device comprises a storage bin for storing materials (sludge), a spiral (auger) for conveying the materials and a feeding metering system for calculating the flow of the materials.
The feeding devices are arranged into two groups, one group is connected with the thermal conditioning device and is used for conveying the sludge into the thermal conditioning device;
and the other group is used for connecting the thermal conditioning device with the pyrolysis carbonization device and conveying the semi-dried sludge generated by the thermal conditioning device into the pyrolysis carbonization device.
the thermal refining device comprises a thermal refining reactor, the thermal refining reactor comprises a hollow and completely sealed shell, a heat conduction cavity 6 is formed inside the shell, and the heat conduction cavity 6 can heat municipal sludge.
Be provided with agitator 5 in the heat conduction chamber 6, agitator 5 is used for stirring municipal sludge to make its better carry out pyrohydrolysis.
The stirrer 5 comprises a rotating shaft arranged along the length direction of the heat conducting cavity 6, and two ends of the rotating shaft are respectively connected with the shell in a rotating manner and are respectively connected with the transmission shaft 4 outside the shell in a transmission manner.
The outer circumference of the rotating shaft is fixedly provided with a spiral stirring blade, and the stirring blade is arranged along the length direction of the heat conducting cavity 6.
The stirrer 5 is in transmission connection with a speed reducer through a transmission shaft 4, and the speed reducer is driven by a motor.
a completely sealed stirrer housing is arranged between the stirrer 5 and the housing, and the stirrer housing is arranged along the length direction of the heat conducting cavity 6.
The two ends of the stirrer shell are respectively in sealing connection with the shell, and the two ends of the stirrer shell are respectively in a cone-shaped structure.
The upper end surface of the stirrer shell is fixedly connected with a feed inlet 2 at a position close to the middle part, and one end of the feed inlet 2 penetrates through the shell for a certain distance and is communicated with a feed metering system in the thermal tempering separation process.
The lower terminal surface of agitator casing is close to the fixed connection in position discharge gate 3 at middle part, and the one end of discharge gate 3 runs through to the outer certain distance of casing to be connected with the ejection of compact machine, the output of this ejection of compact machine is connected with the feed bin.
The upper end surface of the stirrer shell is connected with a water vapor discharge port 1 at a position close to one end, and one end of the water vapor discharge port 1 penetrates through the outer surface of the shell.
The pyrolysis carbonization device comprises a pyrolysis carbonization reactor, the pyrolysis carbonization reactor comprises a hollow reactor shell 16, and an insulating layer 10 is attached to the inner wall of the shell 16.
A rotatable roller 17 is arranged in the reactor shell 16, and the roller 17 is arranged along the length direction of the reactor shell 16.
A heat conducting cavity 11 of the pyrolysis carbonization reactor is arranged between the roller 17 and the heat insulating layer 10, and a burner 8 communicated with the heat conducting cavity 11 of the pyrolysis carbonization reactor is fixedly arranged outside the reactor shell 16.
The two ends of the drum 17 extend to the outside of the reactor shell 16 for a certain distance respectively and are coaxially provided with a transmission gear 13, and the transmission gear 13 is meshed with a driving wheel and is driven by a motor.
Fixed mounting has helical blade 18 on the inner wall of cylinder 17, and helical blade 18 sets up along the length direction of cylinder 17, and cylinder 17 rotates and drives helical blade 18 rotatory, drives municipal sludge then and removes according to certain direction.
One end of the roller 17 is connected with a feed inlet 7 of the pyrolysis and carbonization reactor, the feed inlet 7 of the pyrolysis and carbonization reactor is communicated with a feed metering system in the pyrolysis and carbonization process, and the feed inlet 7 of the pyrolysis and carbonization reactor can convey municipal sludge into the roller 17;
The other end of the roller 17 is connected with a discharge port 14 of the pyrolysis carbonization reactor, and the municipal sludge after the pyrolysis carbonization reaction is output from the discharge port 14 of the pyrolysis carbonization reactor.
the interior of the drum 17 forms a reaction zone 12, and municipal sludge undergoes pyrolysis carbonization reaction in the reaction zone 12.
The two ends of the roller 17 close to the transmission gear 13 are respectively supported by the supporting wheels 15 for rotation.
the supporting wheels 15 and the reactor shell 16 are respectively and fixedly arranged on the frame, and the upper end surface of the reactor shell 16 is provided with a flue gas outlet 9 communicated with the reaction zone 12.
the tail gas treatment device comprises a separation device communicated with the flue gas outlet 9, and the separation device is used for separating solid and gas in the gaseous product output by the flue gas outlet 9.
The separating device is communicated with a condensing device and a discharging machine, gas separated by the separating device enters the condensing device, and solid separated by the separating device is output by the discharging machine.
The condensing equipment is communicated with a middle adjusting equipment storage tank and a middle buffer gas tank, most of gas output by the condensing equipment enters the middle adjusting equipment storage tank, and the rest gas enters the middle buffer gas tank.
The output end of the middle buffer gas tank is communicated with deacidification purification equipment, the output ends of the deacidification purification equipment and the middle adjusting equipment storage tank are communicated with an anti-backfire device, and the anti-backfire device is communicated with a burner.
And the burner is connected with a waste heat recovery device, and the output end of the waste heat recovery device is communicated with a heat conduction cavity 6 in the thermal conditioning reactor.
The burner and the waste heat recovery equipment form a heat supply device.
The utility model also discloses a municipal sludge pyrolysis treatment complete process of adopting above-mentioned device, including following process:
First, thermal refining and separating process
a. send municipal sludge into thermal conditioning device
1. Conveying municipal sludge from a bin into a feeding metering system through a screw, and feeding the municipal sludge into an indirect heating thermal conditioning reactor (thermal conditioning device) according to the amount;
2. The municipal sludge is subjected to thermal hydrolysis in a thermal hydrolysis reactor (thermal tempering reactor) at the temperature of 110-150 ℃, and the thermal hydrolysis time is 45 min;
3. After the municipal sludge is subjected to thermal conditioning treatment, microbial flocs are disintegrated, microbial cells are broken, organic matters (such as protein, lipid and carbohydrate) of the cells are released and further hydrolyzed, when certain pressure is reached in a thermal conditioning reactor, pressure relief is started, a large amount of water vapor (water) is released, so that the municipal sludge is semi-dried, and the semi-dried municipal sludge enters a bin through a discharging machine and is ready to enter a pyrolysis carbonization process.
second, pyrolysis and carbonization process
1. The municipal sludge separated in the thermal conditioning process enters a feeding metering system from a storage bin through spiral conveying, and is proportionally and quantitatively fed into a pyrolysis carbonization reactor with zero-valent iron and NaOH for continuous heating, and the weight ratio of the municipal sludge to the zero-valent iron is 1000: 1, the weight ratio of the municipal sludge to NaOH is 100: 2;
When the pyrolysis carbonization reactor is started, all energy sources are supplied by burning natural gas, and a normal production stage is carried out, wherein part of the energy sources adopt combustible hydrocarbon generated by self pyrolysis of municipal sludge as fuel;
the pyrolysis process (pyrolysis carbonization process) mainly aims at the municipal sludge to carry out harmless and resource treatment, mainly utilizes the pyrolysis principle, cuts off the re-synthesis way of dioxin and furan in a closed environment, realizes the recovery and the reutilization of resources, and generates a large amount of available combustible hydrocarbons.
2. When the temperature in the pyrolysis reactor (pyrolysis carbonization reactor) reaches 300 +/-5 ℃, part of combustible hydrocarbon gas is generated in the pyrolysis reactor;
when the temperature reaches 410 +/-5 ℃, the combustible hydrocarbon gas enters a stable generation stage temporarily and lasts for a period of time.
Third, tail gas treatment process
a. And (4) feeding the gaseous products generated by pyrolysis and carbonization into a separation device, collecting and recovering solid matters in the gas, and feeding the gaseous products into a condensing device.
1. Conveying gaseous products generated by pyrolysis in the pyrolysis carbonization procedure to a separation device, collecting and recovering solid substances in the gaseous products, and outputting the solid substances through a discharging machine to obtain municipal sludge-based biochar;
2. the gas (water vapor and gaseous flammable hydrocarbon) in the gaseous product enters condensing equipment, most of the product (water vapor) of the gaseous product is changed into liquid and enters an intermediate regulating storage tank, the rest gas enters an intermediate buffer gas tank, passes through deacidification and purification equipment (no substances (metal or oxide thereof) with catalytic action exist after water bath dust removal and steam-water separation and purification treatment), is guided into a burner (a heat supply device) through an anti-tempering device for combustion, and the generated high-temperature gas provides required heat energy for a pyrolysis and carbonization process;
The combustion process of combustible gas (pyrolysis gas) generated in the pyrolysis carbonization procedure is a thorough and clean oxidation process, high-temperature heat energy generated by the combustion of the pyrolysis gas is recycled to the pyrolysis carbonization process, hot flue gas is discharged, and the hot flue gas is recycled to the thermal hydrolysis pretreatment process (thermal tempering separation procedure) through waste heat recovery equipment by energy step utilization, so that energy balance is realized.
The utility model discloses the beneficial effect who produces does: 1. the utility model integrates three processes of thermal conditioning separation, pyrolysis carbonization and tail gas treatment by the process modes of sectional treatment, directional adjustment, accurate control and cooperative treatment, changes the traditional extensive treatment mode of the original municipal sludge, adopts core processes such as pyrolysis and the like, and the pyrolysis process treats the municipal sludge to obtain energy for recycling, thereby reducing external energy; the whole process can realize heat balance, and avoid the problem of secondary pollution to the environment;
2. The leaching property of heavy metal of the sludge solid product (sludge-based biochar) treated by the process is obviously reduced compared with that of the original sludge, under the condition that the proportion of a detected substance and the leaching time are increased, copper, nickel, lead, cadmium and chromium are not detected, the detection of arsenic is 0.0386mg/L, the detection value of zinc is 0.107mg/L, and the detection result is obviously superior to the requirement of sludge treatment in the sludge treatment standard of the sewage treatment plant in cities and towns;
3. The municipal sludge-based biochar after innocent treatment can be used as a landscaping base fertilizer raw material and a soil improvement material, so that the resource utilization of municipal sludge is realized;
4. The utility model discloses after the industrialization, can realize the cyclic development of "treating waste with waste", provide operable technology and innovation mode to the innoxious utilization of resources of china's mud.
Having shown and described the basic principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof, and it is therefore intended that the embodiments be considered as exemplary and not limiting in any way, since the scope of the invention is defined by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein and are therefore not to be embraced therein by any reference numerals in the claims.
Claims (4)
1. the utility model provides a municipal sludge pyrolysis treatment device which characterized in that: the device comprises a feeding device for feeding, a thermal conditioning device for performing primary treatment on municipal sludge, a pyrolysis carbonization device for pyrolyzing semi-dried sludge, a heat supply device for supplying heat to the whole device and a tail gas treatment device for performing tail gas treatment on the whole device;
The pyrolysis carbonization device comprises a rotary drum (17);
the roller (17) is provided with a heat-insulating layer (10);
A heat conduction cavity (11) of the pyrolysis carbonization reactor is arranged between the heat preservation layer (10) and the roller (17), and a burner (8) is connected to the heat conduction cavity (11) of the pyrolysis carbonization reactor;
a helical blade (18) is arranged in the roller (17);
a reaction zone (12) is formed inside the roller (17), and municipal sludge is subjected to pyrolysis and carbonization reaction in the reaction zone (12);
One end of the roller (17) is connected with a feeding hole (7) of the pyrolysis carbonization reactor, the other end of the roller (17) is connected with a discharging hole (14) of the pyrolysis carbonization reactor, and municipal sludge after pyrolysis carbonization reaction is output from the discharging hole (14) of the pyrolysis carbonization reactor;
the thermal conditioning device comprises a thermal conditioning reactor, the thermal conditioning reactor comprises a hollow and completely sealed shell, a heat conduction cavity (6) capable of heating municipal sludge is formed inside the shell, and a stirrer (5) is arranged in the heat conduction cavity (6);
The stirrer (5) comprises a helical stirring blade;
A completely sealed stirrer shell is arranged between the stirrer (5) and the shell, two ends of the stirrer shell are respectively connected with the shell in a sealing way, and the two ends are respectively in a cone-shaped structure.
2. The municipal sludge pyrolysis treatment apparatus of claim 1, wherein: the stirring blades are arranged along the length direction of the heat conducting cavity (6).
3. The municipal sludge pyrolysis treatment apparatus of claim 2, wherein: and a water vapor discharge port (1) is connected to the stirrer (5).
4. The municipal sludge pyrolysis treatment apparatus of claim 3, wherein: the helical blades (18) are arranged along the length direction of the drum (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201821522441.8U CN209797735U (en) | 2018-09-18 | 2018-09-18 | Municipal sludge pyrolysis treatment device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821522441.8U CN209797735U (en) | 2018-09-18 | 2018-09-18 | Municipal sludge pyrolysis treatment device |
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| CN209797735U true CN209797735U (en) | 2019-12-17 |
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| CN201821522441.8U Active CN209797735U (en) | 2018-09-18 | 2018-09-18 | Municipal sludge pyrolysis treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899003A (en) * | 2021-02-02 | 2021-06-04 | 西安交通大学 | Multifunctional full-automatic biomass carbonization system and biomass carbonization method |
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2018
- 2018-09-18 CN CN201821522441.8U patent/CN209797735U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899003A (en) * | 2021-02-02 | 2021-06-04 | 西安交通大学 | Multifunctional full-automatic biomass carbonization system and biomass carbonization method |
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