CN102643001B - Fluidization heat accumulation type sludge low-temperature catalytic pyrolysis method and device thereof - Google Patents

Fluidization heat accumulation type sludge low-temperature catalytic pyrolysis method and device thereof Download PDF

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CN102643001B
CN102643001B CN2012101535743A CN201210153574A CN102643001B CN 102643001 B CN102643001 B CN 102643001B CN 2012101535743 A CN2012101535743 A CN 2012101535743A CN 201210153574 A CN201210153574 A CN 201210153574A CN 102643001 B CN102643001 B CN 102643001B
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gas
heat
mud
pyrolysis
fluidization
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CN102643001A (en
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闫云飞
杨仲卿
张力
唐强
蒲舸
张�杰
张磊
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Chongqing University
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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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
    • 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 invention discloses a fluidization heat accumulation type sludge low-temperature catalytic pyrolysis method. The method comprises the following steps: A, sludge is pyrolyzed to produce gas; B, pyrolysis gas is recycled; and C, the residual heat produced by waste gas combustion is utilized. The invention also discloses a fluidization heat accumulation type sludge low-temperature catalytic pyrolysis device. On one hand, the pyrolysis gas produced by the pyrolyzed sludge is enabled to pass through an air preheater, so that the heat is recycled, and then the pyrolysis gas is condensed by a condenser to obtain tar, and the pollution to the environment due to gas emission is avoided; on the other hand, the pyrolysis waste is directly discharged and collected, the structure is simple, the operation is convenient and the potential safety hazard is also reduced. According to the invention, the fluidization, the pyrolysis of heat accumulation particles and the residual heat produced by pyrolysis gas and waste gas combustion are comprehensively utilized, and tar is also prepared, so that the efficient utilization of energy and resource of sludge and the environmental protection are realized.

Description

Fluidization heat accumulating type sludge at low temperature catalyse pyrolysis method and device thereof
Technical field
The present invention relates to a kind of solid waste low-temperature catalysis thermal decomposition method and device thereof, relate in particular to a kind of fluidization heat accumulating type sludge at low temperature catalyse pyrolysis method and device thereof.
Background technology
Mud (Sewage Sludge, SS) refer generally in water treatment procedure, to produce, and the mixture of the solid that deposits in the sewer and water or colloid thing, be a kind of extremely complicated heterogeneous body of being formed by organic substance relic, bacterium thalline, inorganic particle, colloid etc.Along with Chinese Urbanization and process of industrialization are accelerated, municipal effluent and industrial sewage quantity discharged are in continuous increase, and according to China Environmental State Bulletin data in 2010, annual 2200 ten thousand tons in the mud that produces wherein 80% was not effectively addressed.Since the mud enrichment pollutants in sewage, contain toxic hard-degraded substance such as a large amount of viral micro-organisms, parasitic ovum, heavy metal and Dioxins, radionuclide etc., if deal with improperly, will threaten human life from aspects such as air, underground water and food chains.Mud has become a difficult problem in need of immediate treatment, how to handle the huge mud of these quantity, and making it reach minimizing, purpose innoxious, resource utilization has become China and even countries in the world environmental protection investigator and be one of problem of paying close attention to deeply.From late 1980s, after countries such as America and Europe found that mud exists many restrictions and unfavorable factor in agricultural, landfill, throwing sea are handled and disposed, the mud heat treatment technics was owing to have that the capacity of subtracting is big, processing speed fast, can decompose that advantage such as objectionable impurities, recoverable energy comes into one's own day by day in the mud.
The mud heat treatment technics can directly be applied fully all showing bigger advantage aspect technical feasibility, Environmental compatibility and the economy.Fully dewater and drying but the prerequisite of making such conclusion is mud, this has just avoided the formed energy consumption of mud pretreatment process, cost, discharging and technical problem.For example: in the digestion of mud, conditioning process, discharge a large amount of NH 4, H 2S, CH 4, gaseous pollutant such as stink, thereby environment is caused negative impact; In the concentration process of mud, consume a large amount of medicaments and part power, increased sewage work's cost; In the dehydration of mud, then not only there is a large amount of power consumptions, and has the problem that automation degree of equipment is low, maintenance workload is big, hygienic risk is high, its Financial cost also can not be underestimated; In the drying process of mud, not only energy consumption and cost are higher, and the foul gas intractable of output; In addition, in fact problems such as the occupation of land of sludge treatment facility and investment are not all resolved.
Summary of the invention
At above shortcomings in the prior art, it is a kind of to realize energy and the efficient utilization of resource and the fluidization heat accumulating type sludge at low temperature catalyse pyrolysis method of environment protection of mud that one of purpose of the present invention has been to provide.
It is a kind of to realize energy and the efficient utilization of resource and the fluidization heat accumulating type sludge at low temperature catalyse pyrolysis device of environment protection of mud that two of purpose of the present invention is to provide.
One of purpose of the present invention is achieved through the following technical solutions:
Fluidization heat accumulating type sludge at low temperature catalyse pyrolysis method comprises the steps:
A, pyrolyzing sludge aerogenesis: to the indoor adding mud of preheating and drying, mud is under the rotary action of the homocline blade of the indoor setting of preheating and drying, mud is evenly distributed on the sieve plate, enter in the mud catalyse pyrolysis reaction chamber Na on mud catalyse pyrolysis reaction chamber wall face by the sieve aperture on the sieve plate 2CO 3Or K 2CO 3The low temperature pyrogenation reaction takes place under the pyrolysis catalytic agent effect, and the mud after the pyrolytic reaction forms pyrolysis product, and pyrolysis product enters in the discharge chamber by discharge opening;
B, pyrolysis gas recycle and reuse: the pyrolysis gas that pyrolysis produces in mud catalyse pyrolysis reaction chamber, enter at first that preheating and drying is indoor to carry out drying to mud, the air that enters then in main air preheater and the air line carries out heat exchange, pyrolysis gas after the heat exchange enters condenser heat exchange cooling, enter gas-liquid separator again and carry out separating liquid, the liquid of separating enters water-and-oil separator, obtains tar; The gas of separating in the gas-liquid separator enters fluidization heat-accumulation combustion chamber under the driving of blower fan II, the flue gas that produces in the fluidization heat-accumulation combustion chamber is discharged by smoke discharging pipe;
C, combustion exhaust UTILIZATION OF VESIDUAL HEAT IN: the flue gas of discharging through air that the main air preheater comes out and smoke discharging pipe is after the heat exchange of secondary air preheater, and the air after the heat exchange enters air compartment under the driving of blower fan I; The pore of air in the air compartment on the air distribution plate of air compartment top setting enters fluidization heat-accumulation combustion chamber, makes the indoor accumulation of heat particle of fluidization heat-accumulation combustion be in fluidized state; The gas that comes out in fluidization heat-accumulation combustion room air and gas-liquid separator separates reacts, to accumulation of heat particle and mud catalyse pyrolysis reaction chamber release of heat.
As a preferred embodiment of the present invention, when the temperature in the mud catalyse pyrolysis reaction chamber is lower than 300 ℃, participate in burning by natural gas line to the indoor feeding Sweet natural gas of fluidization heat-accumulation combustion.
Two of purpose of the present invention is achieved through the following technical solutions:
Fluidization heat accumulating type sludge at low temperature catalyse pyrolysis device comprises pyrolyzing sludge gas production system, pyrolysis gas recycle and reuse system and combustion exhaust bootstrap system;
Described pyrolyzing sludge gas production system comprises mud catalyse pyrolysis reaction chamber and the preheating and drying chamber, sieve plate, fluidization heat-accumulation combustion chamber, air distribution plate, air compartment and the discharge chamber that arrange from top to bottom; Described mud catalyse pyrolysis reaction chamber is tubular structure, is provided with Na at the inner-wall surface of mud catalyse pyrolysis reaction chamber 2CO 3Or K 2CO 3Pyrolysis catalytic agent layer; A plurality of mud catalyse pyrolysis reaction chambers vertically are set in that the fluidization heat-accumulation combustion is indoor, the top of mud catalyse pyrolysis reaction chamber communicates with preheating and drying is indoor by the sieve aperture of sieve plate, and the bottom of mud catalyse pyrolysis reaction chamber is passed air distribution plate and air compartment and is communicated with discharge chamber; Described air compartment is communicated with fluidization heat-accumulation combustion chamber by the pore on the air distribution plate; Described preheating and drying top indoor and that be positioned at sieve plate is provided with rotating homocline blade; Described preheating and drying chamber is provided with opening for feed, and described fluidization heat-accumulation combustion chamber is provided with smoke discharging pipe;
Described pyrolysis gas recycle and reuse system comprises main air preheater, condenser, gas-liquid separator, blower fan II, water-and-oil separator, water collector and tar well; One end of the heat transfer tube in the described main air preheater is communicated with preheating and drying is indoor, and the other end of the heat transfer tube in the main air preheater is connected with the inlet mouth of condenser; The liquid outlet of described condenser is connected with water-and-oil separator, and the air outlet of condenser is connected with the inlet mouth of gas-liquid separator; The liquid outlet of described gas-liquid separator is connected with water-and-oil separator; The blower fan II is indoor with the gas suction fluidization heat-accumulation combustion of separating in the gas-liquid separator; The water outlet of described water-and-oil separator connects water collector, and the oil outlet of water-and-oil separator connects tar well;
Described combustion exhaust bootstrap system comprises secondary air preheater and blower fan I; The inlet mouth of the heat transfer tube in the described secondary air preheater is connected with exit flue; Described blower fan I is with in the air suction air compartment in the secondary air preheater.
As a preferred embodiment of the present invention, fill the accumulation of heat particle in the described fluidization heat-accumulation combustion chamber and outside mud catalyse pyrolysis reaction chamber.
As another kind of preferred version of the present invention, described fluidization heat-accumulation combustion chamber is provided with portfire and natural gas line.
Fluidization heat accumulating type sludge at low temperature catalyse pyrolysis method of the present invention and device thereof compared with prior art have following advantage:
1, the present invention's pyrolysis gas that pyrolyzing sludge is produced is on the one hand by air preheater, with heat recovery and utilization, makes tar by condenser after with the pyrolysis gas condensation again, avoids the gaseous emission contaminate environment; On the other hand, the pyrolysis waste is directly discharged collection, and is simple in structure, and convenient operation also can reduce potential safety hazard.The present invention fully utilizes fluidization, the pyrolysis of accumulation of heat particle and utilizes the waste heat of pyrolysis gas, combustion exhaust and make tar, realizes the energy of mud and efficient utilization and the environment protection of resource.
2, mud catalyse pyrolysis reaction chamber wall is coated with catalyzer, has promoted the pyrolysis of mud, has reduced pyrolysis temperature simultaneously, makes mud pyrolysis smoothly at low temperatures.
3, the accumulation of heat particle of fluidized state can make heat distribution more even, and can reduce thermal losses, makes mud catalyse pyrolysis reaction chamber remain on the pyrolysis optimum temps, promotes pyrolysis.
4, the pyrolysis gas of Pai Chuing and the flue combustion product gases elder generation post-heating air of discharging, waste heat take full advantage of the effect that cuts down the consumption of energy of playing.
5, the mud on the sieve plate passes through the homocline of homocline blade and makes thinner, make mud drying and preheating more efficiently, simultaneously mud is entered in the mud catalyse pyrolysis reaction chamber more equably and carry out pyrolysis, mud catalyse pyrolysis reaction chamber arranges side by side evenly in that the fluidization heat-accumulation combustion is indoor, thereby can significantly improve thermo-efficiency.
6, the pyrolysis gas of pyrolysis generation is introduced the burning of fluidization heat-accumulation combustion chamber after condenser separates, and has not only protected environment, also can be pyrolyzing sludge heat is provided.
7, pyrolysis gas is carried out condensation to collect the tar goods, have feasible industrial applicibility.
Description of drawings
Fig. 1 is the structural representation of fluidization heat accumulating type sludge at low temperature catalyse pyrolysis device;
Fig. 2 is the structural representation of sieve plate;
Fig. 3 is the structural representation of air distribution plate.
In the accompanying drawing: 1-preheating and drying chamber; 2-fluidization heat-accumulation combustion chamber; 3-air distribution plate; 4-air compartment; 5-exit flue; 6-discharge chamber; 7-main air preheater; 8-secondary air preheater; 91-blower fan I; 92-blower fan II; 10-condenser; 11-gas-liquid separator; 12-water-and-oil separator; 13-motor; 14-opening for feed; 15-air line; 16-homocline blade; 17-sieve plate; 18-discharge opening; 19-mud catalyse pyrolysis reaction chamber; 20-water collector; 21-tar well; 22-portfire; 23-natural gas line; 24-sieve aperture; 25-pore.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done explanation in further detail.
Fluidization heat accumulating type sludge at low temperature catalyse pyrolysis method can adopt device as shown in Figure 1 in the method, and this method comprises the steps:
A, pyrolyzing sludge aerogenesis: the 1 interior mud that adds to the preheating and drying chamber, under the rotary action of the homocline blade 16 that mud arranges in preheating and drying chamber 1, mud is evenly distributed on the sieve plate 17, enter in the mud catalyse pyrolysis reaction chamber 19 Na on mud catalyse pyrolysis reaction chamber 19 inner-wall surfaces by the sieve aperture 24 on the sieve plate 17 2CO 3Or K 2CO 3The low temperature pyrogenation reaction takes place under the pyrolysis catalytic agent effect, and the mud after the pyrolytic reaction forms pyrolysis product, and pyrolysis product enters in the discharge chamber 6 by discharge opening 18.
B, pyrolysis gas recycle and reuse: the pyrolysis gas that pyrolysis produces in mud catalyse pyrolysis reaction chamber 19, at first enter in the preheating and drying chamber 1 mud is carried out drying, the air that enters then in main air preheater 7 and the air line 15 carries out heat exchange, pyrolysis gas after the heat exchange enters condenser 10 heat exchange cooling, enter gas-liquid separator 11 again and carry out separating liquid, the liquid of separating enters water-and-oil separator 12, obtains tar; The gas that gas-liquid separator 11 is separated enters fluidization heat-accumulation combustion chamber 2 under the driving of blower fan II 92, the flue gas that produces in the fluidization heat-accumulation combustion chamber 2 is discharged by smoke discharging pipe 5.
C, combustion exhaust UTILIZATION OF VESIDUAL HEAT IN: the flue gas of discharging through air that main air preheater 7 comes out and smoke discharging pipe 5 is after 8 heat exchange of secondary air preheater, and the air after the heat exchange enters air compartment 4 under the driving of blower fan I 91; The pore 25 of air in the air compartment 4 on the air distribution plate 3 of air compartment 4 tops setting enters fluidization heat-accumulation combustion chamber 2, makes the accumulation of heat particles in the fluidization heat-accumulation combustion chamber 2 be in fluidized state; The gas that air and gas-liquid separator 11 are separated in fluidization heat-accumulation combustion chamber 2 reacts, to accumulation of heat particle and mud catalyse pyrolysis reaction chamber 19 release of heat.
When the temperature in the mud catalyse pyrolysis reaction chamber 19 is lower than 300 ℃, feed Sweet natural gases in 2 to fluidization heat-accumulation combustion chamber by natural gas line 23, and participate in burning, guarantee that the catalyse pyrolysis reaction is in metastable state.
Fluidization heat accumulating type sludge at low temperature catalyse pyrolysis device comprises pyrolyzing sludge gas production system, pyrolysis gas recycle and reuse system and combustion exhaust bootstrap system, as shown in Figure 1.
Wherein, the pyrolyzing sludge gas production system comprises mud catalyse pyrolysis reaction chamber 19 and the preheating and drying chamber 1, sieve plate 17, fluidization heat-accumulation combustion chamber 2, air distribution plate 3, air compartment 4 and the discharge chamber 6 that arrange from top to bottom.Mud catalyse pyrolysis reaction chamber 19 is tubular structure, is coated with Na at the inner-wall surface of mud catalyse pyrolysis reaction chamber 19 2CO 3Or K 2CO 3Pyrolysis catalytic agent layer; A plurality of mud catalyse pyrolysis reaction chambers 19 vertically are set in fluidization heat-accumulation combustion chamber 2, communicate in the sieve aperture of the top of mud catalyse pyrolysis reaction chamber 19 by sieve plate 17 and the preheating and drying chamber 1, the bottom of mud catalyse pyrolysis reaction chamber 19 is passed air distribution plate 3 and air compartment 4 and is communicated with discharge chamber 6.Air compartment 4 is communicated with fluidization heat-accumulation combustion chamber 2 by the pore 25 on the air distribution plate 3; In the preheating and drying the chamber 1 and top that is positioned at sieve plate 17 is provided with rotating homocline blade 16, and in the present embodiment, homocline blade 16 is driven by motor 13 and rotates, and by rotation homocline blade 16 mud is evenly distributed on sieve plate 17, is easy to drying sludge.Preheating and drying chamber 1 is provided with opening for feed 14, and fluidization heat-accumulation combustion chamber 2 is provided with smoke discharging pipe 5, portfire 22 and natural gas line 23.
Pyrolysis gas recycle and reuse system comprises main air preheater 7, condenser 10, gas-liquid separator 11, blower fan II 92, water-and-oil separator 12, water collector 20 and tar well 21.One end of the heat transfer tube in the main air preheater 7 and 1 interior connection of preheating and drying chamber, the other end of the heat transfer tube in the main air preheater 7 is connected with the inlet mouth of condenser 10.The liquid outlet of condenser 10 is connected with water-and-oil separator 12, and the air outlet of condenser 10 is connected with the inlet mouth of gas-liquid separator 11; The liquid outlet of gas-liquid separator 11 is connected with water-and-oil separator 12.Blower fan II 92 is with in the gas suction fluidization heat-accumulation combustion chamber 2 of separating in the gas-liquid separator 11; The water outlet of water-and-oil separator 12 connects water collector 20, and the oil outlet of water-and-oil separator 12 connects tar well 21.
The combustion exhaust bootstrap system comprises secondary air preheater 8 and blower fan I 91.The inlet mouth of the heat transfer tube in the secondary air preheater 8 is connected with exit flue 5; Blower fan I 91 is with in the air suction air compartment 4 in the secondary air preheater 8.
Fill the accumulation of heat particle in the fluidization heat-accumulation combustion chamber 2 and outside mud catalyse pyrolysis reaction chamber 19.Air compartment 4 tops are provided with air distribution plate 3, and the pore 25 of air on air distribution plate 3 enters in the fluidization heat-accumulation combustion chamber 2, make the accumulation of heat particle in the fluidization heat-accumulation combustion chamber 2 be in fluidized state.Make to keep more uniform flow field and high-temperature temperature fields in the fluidization heat-accumulation combustion chamber 2, enhancement of heat transfer is conducive to stablizing and carrying out of pyrolytic reactions in the mud catalyse pyrolysis reaction chamber 19.
In the process of using this fluidization heat accumulating type sludge at low temperature catalyse pyrolysis device, the pyrolysis gas that pyrolytic process produces upwards flows, and enters preheating and drying chamber 1 internal heating, dry wet mud.Mud after drying enters pyrolysis in the mud catalyse pyrolysis reaction chamber 19 by the sieve aperture 24 on the sieve plate 17 under the effect of the stirring of homocline blade 16 and gravity.After the pyrolytic reaction, mud is converted into porous activated carbon, falls under gravity into discharge chamber 6, and pyrolysis gas heats in preheating and drying chamber 1, enter main air preheater 7 behind the dry wet mud, add the air that hot-air duct 15 passes through, then enter condensation separation in the condenser 10.The gas that condensation produces enters in the gas-liquid separator 11 and separates, and the liquid of separating enters together in the water-and-oil separator 12 with the liquid that condenser 10 is separated and further separates; The water that water-and-oil separator 12 is separated enters water collector 20, and the tar of separating enters tar well 21.The gas that gas-liquid separator 11 is separated is introduced in the fluidization heat-accumulation combustion chambers 2 by blower fan II 92, enters air catalytic combustion in the fluidization heat-accumulation combustion chamber 2 with air compartment 4.Freezing air at first enters main air preheater 7 and tentatively heats up, then enter in the secondary air preheater 8 along air line 15, the flue gas of discharging with smoke discharging pipe 5 carries out heat exchange, air in the secondary air preheater 8 is heated again, introduced air compartment 4 by blower fan I 91 at last, enter fluidization heat-accumulation combustion chamber 2 by the pore 25 on the air distribution plate 3 and participate in burning.The waste gas that produces in the fluidization heat-accumulation combustion chamber 2 enters in the secondary air preheater 8 along flue 5, makes the waste heat of waste gas be utilized the back discharge.For guaranteeing the stable normal operation of this device, when 300 ℃ of temperature mud catalyse pyrolysis reaction chamber 19 in, can feed the part Sweet natural gases by natural gas line 23, guarantee that catalyse pyrolysis reacts the metastable state that is in; Institute's energy requirement is introduced Sweet natural gas by natural gas line 23 and through portfire 22 ignition, is heated the accumulation of heat particle in the fluidization heat-accumulation combustion chamber 2 during startup, makes in the fluidization heat-accumulation combustion chamber 2 to reach comparatively high temps.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (4)

1. fluidization heat accumulating type sludge at low temperature catalyse pyrolysis method is characterized in that, comprises the steps:
A, pyrolyzing sludge aerogenesis: in preheating and drying chamber (1), add mud, under the rotary action of the homocline blade (16) that mud arranges in preheating and drying chamber (1), mud is evenly distributed on the sieve plate (17), enter in the mud catalyse pyrolysis reaction chamber (19) Na on mud catalyse pyrolysis reaction chamber (19) inner-wall surface by the sieve aperture (24) on the sieve plate (17) 2CO 3Or K 2CO 3The low temperature pyrogenation reaction takes place under the pyrolysis catalytic agent effect, and the mud after the pyrolytic reaction forms pyrolysis product, and pyrolysis product enters in the discharge chamber (6) by discharge opening (18);
B, pyrolysis gas recycle and reuse: the pyrolysis gas that pyrolysis produces in mud catalyse pyrolysis reaction chamber (19), at first enter in the preheating and drying chamber (1) mud is carried out drying, the air that enters then in main air preheater (7) and the air line (15) carries out heat exchange, pyrolysis gas after the heat exchange enters condenser (10) heat exchange cooling, enter gas-liquid separator (11) again and carry out separating liquid, the liquid of separating enters water-and-oil separator (12), obtains tar; The gas of separating in the gas-liquid separator (11) enters fluidization heat-accumulation combustion chamber (2) under the driving of blower fan II (92), the flue gas that produces in the fluidization heat-accumulation combustion chamber (2) is discharged by smoke discharging pipe (5);
C, combustion exhaust UTILIZATION OF VESIDUAL HEAT IN: the flue gas that the air that comes out through main air preheater (7) and smoke discharging pipe (5) are discharged is in secondary air preheater (8) heat exchange, and the air after the heat exchange enters air compartment (4) under the driving of blower fan I (91); The pore (25) of air in the air compartment (4) on the air distribution plate (3) of air compartment (4) top setting enters fluidization heat-accumulation combustion chamber (2), makes the accumulation of heat particle in the fluidization heat-accumulation combustion chamber (2) be in fluidized state; The gas that air in the fluidization heat-accumulation combustion chamber (2) and gas-liquid separator (11) are separated reacts, to accumulation of heat particle and mud catalyse pyrolysis reaction chamber (19) release of heat.
2. fluidization heat accumulating type sludge at low temperature catalyse pyrolysis method according to claim 1, it is characterized in that: when the temperature in the mud catalyse pyrolysis reaction chamber (19) was lower than 300 ℃, the interior Sweet natural gas that feeds participated in burning to fluidization heat-accumulation combustion chamber (2) by natural gas line (23).
3. fluidization heat accumulating type sludge at low temperature catalyse pyrolysis device is characterized in that: comprise pyrolyzing sludge gas production system, pyrolysis gas recycle and reuse system and combustion exhaust bootstrap system;
Described pyrolyzing sludge gas production system comprises mud catalyse pyrolysis reaction chamber (19) and the preheating and drying chamber (1), sieve plate (17), fluidization heat-accumulation combustion chamber (2), air distribution plate (3), air compartment (4) and the discharge chamber (6) that arrange from top to bottom; Described mud catalyse pyrolysis reaction chamber (19) is tubular structure, is provided with Na at the inner-wall surface of mud catalyse pyrolysis reaction chamber (19) 2CO 3Or K 2CO 3Pyrolysis catalytic agent layer; A plurality of mud catalyse pyrolysis reaction chambers (19) vertically are set in fluidization heat-accumulation combustion chamber (2), communicate in the sieve aperture (24) of the top of mud catalyse pyrolysis reaction chamber (19) by sieve plate (17) and preheating and drying chamber (1), the bottom of mud catalyse pyrolysis reaction chamber (19) is passed air distribution plate (3) and air compartment (4) and is communicated with discharge chamber (6); Described air compartment (4) is communicated with fluidization heat-accumulation combustion chamber (2) by the pore (25) on the air distribution plate (3); In the described preheating and drying chamber (1) and the top that is positioned at sieve plate (17) is provided with rotating homocline blade (16); Described preheating and drying chamber (1) is provided with opening for feed (14), and described fluidization heat-accumulation combustion chamber (2) is provided with smoke discharging pipe (5);
Described pyrolysis gas recycle and reuse system comprises main air preheater (7), condenser (10), gas-liquid separator (11), blower fan II (92), water-and-oil separator (12), water collector (20) and tar well (21); One end of the heat transfer tube in the described main air preheater (7) is communicated with preheating and drying chamber (1) is interior, and the other end of the heat transfer tube in the main air preheater (7) is connected with the inlet mouth of condenser (10); The liquid outlet of described condenser (10) is connected with water-and-oil separator (12), and the air outlet of condenser (10) is connected with the inlet mouth of gas-liquid separator (11); The liquid outlet of described gas-liquid separator (11) is connected with water-and-oil separator (12); Blower fan II (92) is with in the gas suction fluidization heat-accumulation combustion chamber (2) of separating in the gas-liquid separator (11); The water outlet of described water-and-oil separator (12) connects water collector (20), and the oil outlet of water-and-oil separator (12) connects tar well (21);
Described combustion exhaust bootstrap system comprises secondary air preheater (8) and blower fan I (91); The inlet mouth of the heat transfer tube in the described secondary air preheater (8) is connected with exit flue (5); Described blower fan I (91) is with in the air suction air compartment (4) in the secondary air preheater (8);
Fill the accumulation of heat particle in the described fluidization heat-accumulation combustion chamber (2) and outside mud catalyse pyrolysis reaction chamber (19).
4. fluidization heat accumulating type sludge at low temperature catalyse pyrolysis device according to claim 3, it is characterized in that: described fluidization heat-accumulation combustion chamber (2) is provided with portfire (22) and natural gas line (23).
CN2012101535743A 2012-05-17 2012-05-17 Fluidization heat accumulation type sludge low-temperature catalytic pyrolysis method and device thereof Expired - Fee Related CN102643001B (en)

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