CN110395866B - Sludge low-temperature smoldering pyrolysis device - Google Patents
Sludge low-temperature smoldering pyrolysis device Download PDFInfo
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- CN110395866B CN110395866B CN201910665418.7A CN201910665418A CN110395866B CN 110395866 B CN110395866 B CN 110395866B CN 201910665418 A CN201910665418 A CN 201910665418A CN 110395866 B CN110395866 B CN 110395866B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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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
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- Treatment Of Sludge (AREA)
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Abstract
The invention discloses a sludge low-temperature smoldering pyrolysis device, which belongs to the technical field of sludge treatment and comprises a pyrolysis furnace body, wherein a closed feeder is arranged at the top of the pyrolysis furnace body, a slag discharger is arranged at the bottom of the pyrolysis furnace body, and a carbon slag processor is assembled at a slag outlet of the slag discharger; the pyrolysis furnace is internally provided with a distributing device which is positioned right below the closed feeder, the bottom of the side wall of the pyrolysis furnace is circumferentially provided with a plurality of suction gas groups, each suction gas group comprises a gas inlet and a gas outlet, the gas inlets are positioned above the gas outlets, the gas inlets and the gas outlets are positioned on the opposite sides of the pyrolysis furnace, the pyrolysis furnace is provided with an annular gas guide pipe, each gas outlet is communicated with the annular gas guide pipe, and a control valve is arranged corresponding to each gas inlet and each gas outlet; the annular air duct is connected with an air duct which is connected with a dust removal and temperature reduction mechanism; realizes a low-temperature smoldering pyrolysis device for sludge, which has sufficient smoldering and high efficiency and can extract more products after smoldering.
Description
Technical Field
The invention belongs to the technical field of sludge treatment, and particularly relates to a low-temperature smoldering pyrolysis device for sludge.
Background
Urban and industrial sludge must be treated in an environment-friendly manner and cannot be directly incinerated, and the currently adopted treatment in a gasification furnace type, a fluidized bed type or a power plant belongs to high-temperature treatment, so that harmful substances such as dioxin and the like can be generated to cause secondary pollution. Chinese patent document CN207797070U discloses a micro-medium pressure smoldering treatment system for oily sludge, which mainly separates gas-liquid two phases by a gas-liquid cyclone separator; the steam is cooled by the cooler, so that the gas-liquid separation efficiency is improved; the emission of harmful gases containing sulfur, nitrogen and the like is reduced through the desulfurization and denitrification reactor, and the purpose of protecting the environment is achieved. Chinese patent document CN107842855A discloses a self-sustaining smoldering treatment platform system for municipal solid waste and a treatment method thereof, which comprises a reaction furnace, a compressed gas cylinder for supplying gas to the reaction furnace, a thermocouple for measuring data in the reaction furnace, an ignition controller, a data acquisition device, a smoke exhaust device above the reaction furnace, a smoke analyzer, a self-sustaining smoldering treatment control software system and a host. The two smoldering treatment modes have the advantages that the whole equipment is complex to operate, the sludge treatment efficiency is not high, no additional product is produced after treatment, and the useful components in the sludge are not fully utilized.
Disclosure of Invention
The invention aims to provide a sludge low-temperature smoldering pyrolysis device; the technical scheme adopted for achieving the purpose is as follows:
a sludge low-temperature smoldering pyrolysis device comprises a pyrolysis furnace body, wherein a closed feeder is arranged at the top of the pyrolysis furnace body, a slag discharger is arranged at the bottom of the pyrolysis furnace body, and a carbon slag processor is assembled at a slag outlet of the slag discharger; the pyrolysis furnace is internally provided with a distributing device which is positioned right below the closed feeder, the bottom of the side wall of the pyrolysis furnace is circumferentially provided with a plurality of suction gas groups, each suction gas group comprises a gas inlet and a gas outlet, the gas inlets are positioned above the gas outlets, the gas inlets and the gas outlets are positioned on the opposite sides of the pyrolysis furnace, the pyrolysis furnace is provided with an annular gas guide pipe, each gas outlet is communicated with the annular gas guide pipe, and a control valve is arranged corresponding to each gas inlet and each gas outlet; the annular air duct is connected with a vent pipe, and the vent pipe is connected with a dust removal and temperature reduction mechanism.
Preferably, the carbon slag processor comprises a sealed extrusion chamber, a slag inlet hermetically connected with a slag outlet of the slag extractor is arranged at the top of the extrusion chamber, a hydraulic cylinder is arranged on the extrusion chamber, a pushing head is fixed on a piston rod of the hydraulic cylinder, the pushing head is positioned in the extrusion chamber, and a necking-type discharge outlet is arranged at one end corresponding to the pushing head.
Preferably, water cooling systems are arranged on the upper surface and the lower surface of the extrusion chamber.
Preferably, the dust removal cooling mechanism comprises a cyclone dust collector and a tube nest cooling device which are connected in sequence, and the vent pipe is connected with the cyclone dust collector.
Preferably, a Roots blower and an anti-tempering tank are arranged on a gas discharge pipeline of the tube array cooler; the liquid discharge pipeline of the tubular cooler is provided with a control switch and a liquid container.
Preferably, the slag extractor is a roller grate.
Preferably, the distributing device is umbrella-shaped, and the maximum diameter of the distributing device is smaller than the inner diameter of the pyrolysis furnace body.
Preferably, the sludge pyrolysis temperature in the pyrolysis furnace body is not higher than 600 ℃.
Preferably, the temperature of the combustible gas in the vent tube is not higher than 500 ℃.
Preferably, the temperature of the combustible gas cooled by the dedusting and cooling mechanism is not higher than 90 ℃.
The invention has the following beneficial effects:
(1) continuous trace heat sources are provided to maintain continuous smoldering of the sludge through a plurality of suction gas groups which are arranged at the bottom of the side wall of the pyrolysis furnace body and work alternately in the circumferential direction; thereby saving the original complicated arrangement of stirring, cooling and smoldering heating plates;
(2) according to the invention, a negative pressure adsorption mode is mainly adopted to suck a trace heat source into sludge, the trace heat source is more fully contacted with the sludge, the path is longer, the smoldering is more sufficient, more combustible gas is generated, and the overall temperature is controlled below 900 ℃, so that the low-temperature smoldering is realized, and the generation of harmful substances such as dioxin is avoided;
(3) the smoldering rate and the smoldering efficiency of the sludge can be regulated and controlled by controlling the air inflow of the air inlet and the air outlet so as to achieve the optimal effect of low-temperature smoldering pyrolysis of the sludge;
(4) the carbon slag generated after the sludge is smoldered cannot be combusted to be useless ash slag, and the useful carbon brick is generated after the carbon slag is extruded by a carbon slag processor, so that the energy utilization efficiency is greatly improved;
(5) high-temperature combustible gas generated after the sludge smolders passes through a dedusting and cooling mechanism to obtain pyroligneous liquor and combustible gas products;
(6) the invention realizes the low-temperature smoldering pyrolysis device for the sludge, which has the advantages of sufficient smoldering, high efficiency and more extraction of products after smoldering.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the invention comprises a pyrolysis furnace body 3, wherein a closed feeder 1 is arranged at the top of the pyrolysis furnace body 3, a slag extractor 6 is arranged at the bottom of the pyrolysis furnace body 3, and a carbon slag processor is arranged at a slag outlet of the slag extractor 6; a distributor 2 is arranged in the pyrolysis furnace body 3 and is positioned right below the closed feeder 1, a plurality of suction gas groups are arranged at the bottom of the side wall of the pyrolysis furnace body 3 around the circumferential direction, each suction gas group comprises a gas inlet 41 and a gas outlet 42, the gas inlet 41 is positioned above the gas outlet 42, the gas inlet 41 and the gas outlet 42 are positioned on the opposite side surfaces of the pyrolysis furnace body 3, an annular gas guide pipe 5 is arranged on the pyrolysis furnace body 3, each gas outlet is communicated with the annular gas guide pipe 5, and a control valve is arranged corresponding to each gas inlet 41 and each gas outlet 42; the annular air duct 5 is connected with an air duct 8, and the air duct 8 is connected with a dust removal and temperature reduction mechanism.
The carbon slag processor comprises a sealed extrusion chamber 73, the top of the extrusion chamber 73 is provided with a slag inlet which is hermetically connected with a slag outlet of the slag extractor 6, the extrusion chamber 73 is provided with a hydraulic cylinder 76, a piston rod 75 of the hydraulic cylinder 76 is fixed with a pushing head 74, the pushing head 74 is positioned in the extrusion chamber 73, and one end corresponding to the pushing head 74 is provided with a necking-type discharge hole 72; water cooling systems 71 are disposed on the upper and lower surfaces of the extrusion chamber 73.
The dedusting and cooling mechanism comprises a cyclone dust collector 9 and a tube nest cooling device 10 which are connected in sequence, and the vent pipe 8 is connected with the cyclone dust collector 9; a Roots blower 12 and an anti-backfire tank 13 are arranged on a gas discharge pipeline of the tube nest cooler 10; the liquid discharge pipeline of the tube array cooler 10 is provided with a control switch 11 and a liquid container.
The slag discharging device 6 is preferably a roller grate, the distributing device 2 is umbrella-shaped, and the maximum diameter of the distributing device 2 is smaller than the inner diameter of the pyrolysis furnace body 3.
The temperature setting requirements for the system are: the pyrolysis temperature of the sludge in the pyrolysis furnace body 3 is not higher than 600 ℃, the temperature of the combustible gas in the vent pipe 8 is not higher than 500 ℃, and the temperature of the combustible gas cooled by the dedusting and cooling mechanism is not higher than 90 ℃.
During working, municipal and industrial sludge is hermetically and uniformly thrown into the pyrolysis furnace body 3 through the closed feeder 1 and is accumulated at the top of the slag extractor 6, the inside of the pyrolysis furnace body 3 is a sealed space, the temperature is kept below 600 ℃, and in the process of smoldering the sludge, the suction gas groups sequentially and alternately work to provide continuous trace heat sources to maintain the continuous smoldering of the sludge; the working mode of each suction air group is that the air inlet 41 and the air outlet 42 which is farthest away from the air inlet 41 are opened, the air outlet 42 is pumped by the Roots blower 12 or a separately arranged negative pressure mechanism, so that a small amount of outside air enters from the air inlet 41, and because the distance between the air inlet 41 and the air outlet 42 is long, a long path is passed, and high-temperature gas generated after smoldering is more. Combustible gas at about 450 ℃ generated after smoldering sequentially enters a cyclone dust collector 9 and a tube array cooler 10 through a vent pipe 8, the combustible gas is cooled by the tube array cooler 10 to obtain dry combustible gas at about 80 ℃ for later use, and chemical substances in the combustible gas at about 450 ℃ are dissolved in liquid in the cooling process to form chemical products such as pyroligneous liquor and the like.
On the other hand, because the whole body adopts a closed smoldering space, carbon slag generated after sludge smoldering does not burn and is changed into useless ash slag, loose carbon slag enters a carbon slag processor through the slag extractor 6, then the hydraulic cylinder 76 acts to compact the loose carbon slag into carbon bricks and extrudes the carbon bricks from the discharge hole 72, oxygen components are not contained in the carbon bricks, the outer surfaces of the carbon bricks are cooled by the water cooling system 71, and therefore, the formed carbon bricks can be reused even if the carbon bricks are exposed in the air.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A low-temperature smoldering pyrolysis method for sludge adopts a device comprising a pyrolysis furnace body, and is characterized in that a closed feeder is arranged at the top of the pyrolysis furnace body, a slag extractor is arranged at the bottom of the pyrolysis furnace body, and a carbon slag processor is assembled at a slag outlet of the slag extractor; the pyrolysis furnace is internally provided with a distributing device which is positioned right below the closed feeder, the bottom of the side wall of the pyrolysis furnace is circumferentially provided with a plurality of suction gas groups, each suction gas group comprises a gas inlet and a gas outlet, the gas inlets are positioned above the gas outlets, the gas inlets and the gas outlets are positioned on the opposite sides of the pyrolysis furnace, the pyrolysis furnace is provided with an annular gas guide pipe, each gas outlet is communicated with the annular gas guide pipe, and a control valve is arranged corresponding to each gas inlet and each gas outlet; the annular air duct is connected with an air duct which is connected with a dust removal and temperature reduction mechanism;
when the device works, municipal and industrial sludge is hermetically and uniformly thrown into a pyrolysis furnace body through a closed feeder and is accumulated at the top of a slag extractor, the inside of the pyrolysis furnace body is a sealed space, the temperature is kept below 600 ℃, and in the process of smoldering the sludge, suction gas groups sequentially and alternately work to provide continuous trace heat sources so as to maintain the continuous smoldering of the sludge; the working mode of each suction air group is that an air inlet and an air outlet which is farthest away from the air inlet are opened, and the air outlet is pumped by a Roots blower or a separately arranged negative pressure mechanism.
2. The low-temperature smoldering pyrolysis method for sludge as claimed in claim 1, wherein the carbon slag processor comprises a sealed extrusion chamber, a slag inlet hermetically connected with a slag outlet of the slag extractor is arranged at the top of the extrusion chamber, a hydraulic cylinder is arranged on the extrusion chamber, a pushing head is fixed on a piston rod of the hydraulic cylinder, the pushing head is positioned in the extrusion chamber, and a reducing type discharge outlet is arranged at the end corresponding to the pushing head.
3. The low-temperature smoldering pyrolysis method for sludge as claimed in claim 2, characterized in that water cooling systems are arranged on the upper surface and the lower surface of the extrusion chamber.
4. The method for pyrolyzing sludge under low temperature and smoldering according to claim 1, wherein the dedusting and cooling mechanism comprises a cyclone dust collector and a tube cooler which are connected in sequence, and the vent pipe is connected with the cyclone dust collector.
5. The low-temperature smoldering pyrolysis method for sludge as claimed in claim 4, wherein a Roots blower and an anti-backfire tank are arranged on a gas discharge pipeline of the tube cooler; the liquid discharge pipeline of the tubular cooler is provided with a control switch and a liquid container.
6. The method for low-temperature smoldering pyrolysis of sludge according to any one of claims 1 to 5, characterized in that the slag extractor is a roller grate.
7. The low-temperature smoldering pyrolysis method for sludge as claimed in claim 6, wherein said distributor is umbrella-shaped, and the maximum diameter of the distributor is smaller than the inner diameter of the pyrolysis furnace body.
8. The method for pyrolyzing sludge under low temperature and smoldering according to any one of claims 1 to 5, wherein the pyrolysis temperature of the sludge in the pyrolysis furnace is not higher than 600 ℃.
9. The method of low-temperature smoldering pyrolysis of sludge as claimed in claim 8, wherein the temperature of combustible gas in said aerator is not higher than 500 ℃.
10. The low-temperature smoldering pyrolysis method for sludge as claimed in claim 9, characterized in that the temperature of the combustible gas cooled by the dedusting and cooling mechanism is not higher than 90 ℃.
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| CN201910665418.7A CN110395866B (en) | 2019-07-23 | 2019-07-23 | Sludge low-temperature smoldering pyrolysis device |
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| CN201910665418.7A CN110395866B (en) | 2019-07-23 | 2019-07-23 | Sludge low-temperature smoldering pyrolysis device |
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| CN110395866A CN110395866A (en) | 2019-11-01 |
| CN110395866B true CN110395866B (en) | 2022-05-24 |
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| CN111394114B (en) * | 2020-04-16 | 2021-08-03 | 华中科技大学 | Organic waste pyrolysis oil production equipment and method based on self-sustaining smoldering combustion |
| CN111425868B (en) * | 2020-04-16 | 2021-06-11 | 华中科技大学 | Sludge self-maintaining smoldering and high-temperature aerobic fermentation composite treatment process and equipment |
| CN113415965B (en) * | 2021-07-21 | 2023-03-10 | 重庆乐乐环保科技有限公司 | Automatic protection system for self-maintaining smoldering treatment of high-water-content sludge |
| CN113531557B (en) * | 2021-07-21 | 2023-04-11 | 重庆乐乐环保科技有限公司 | Municipal wastewater sludge self-sustaining smoldering treatment system |
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| CN101571424A (en) * | 2009-06-15 | 2009-11-04 | 上海烟草（集团）公司 | Cigarette infrared temperature measurement synchronous shifter |
| CN108467738A (en) * | 2018-06-07 | 2018-08-31 | 郑州鑫地机械设备有限公司 | Solid waste medium temperature pyrocrack furnace |
| CN209042397U (en) * | 2018-10-18 | 2019-06-28 | 浙江宜可欧环保科技有限公司 | Glow furnace and the oil-bearing sludge treatment equipment containing the furnace that glows |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6419287B1 (en) * | 2017-10-17 | 2018-11-07 | 株式会社神鋼環境ソリューション | Deposit processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571424A (en) * | 2009-06-15 | 2009-11-04 | 上海烟草（集团）公司 | Cigarette infrared temperature measurement synchronous shifter |
| CN108467738A (en) * | 2018-06-07 | 2018-08-31 | 郑州鑫地机械设备有限公司 | Solid waste medium temperature pyrocrack furnace |
| CN209042397U (en) * | 2018-10-18 | 2019-06-28 | 浙江宜可欧环保科技有限公司 | Glow furnace and the oil-bearing sludge treatment equipment containing the furnace that glows |
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