CN108529844A - A kind of sewage sludge gas heat carrier classification low temperature pyrogenation system and method - Google Patents
A kind of sewage sludge gas heat carrier classification low temperature pyrogenation system and method Download PDFInfo
- Publication number
- CN108529844A CN108529844A CN201810615958.XA CN201810615958A CN108529844A CN 108529844 A CN108529844 A CN 108529844A CN 201810615958 A CN201810615958 A CN 201810615958A CN 108529844 A CN108529844 A CN 108529844A
- Authority
- CN
- China
- Prior art keywords
- gas
- dry
- reactor
- pyrolysis
- sludge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000010801 sewage sludge Substances 0.000 title claims abstract description 20
- 238000000197 pyrolysis Methods 0.000 claims abstract description 72
- 238000010791 quenching Methods 0.000 claims abstract description 64
- 230000000171 quenching effect Effects 0.000 claims abstract description 64
- 239000010802 sludge Substances 0.000 claims abstract description 50
- 239000000428 dust Substances 0.000 claims abstract description 42
- 229910052751 metal Inorganic materials 0.000 claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 42
- 239000000571 coke Substances 0.000 claims abstract description 40
- 239000008187 granular material Substances 0.000 claims abstract description 39
- 150000002739 metals Chemical class 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 239000004744 fabric Substances 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 238000004064 recycling Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 100
- 239000003034 coal gas Substances 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 34
- 239000011269 tar Substances 0.000 claims description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 31
- 239000003546 flue gas Substances 0.000 claims description 31
- 238000001035 drying Methods 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 27
- 125000004122 cyclic group Chemical group 0.000 claims description 19
- 238000011084 recovery Methods 0.000 claims description 19
- 239000000779 smoke Substances 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 15
- 239000011285 coke tar Substances 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 3
- 230000000153 supplemental effect Effects 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims 1
- 239000002351 wastewater Substances 0.000 abstract description 7
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract description 6
- 239000010865 sewage Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000000969 carrier Substances 0.000 abstract description 2
- 230000001629 suppression Effects 0.000 abstract description 2
- 230000026676 system process Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 206010002660 Anoxia Diseases 0.000 description 1
- 241000976983 Anoxia Species 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007953 anoxia Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 210000000952 spleen Anatomy 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Materials Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of sewage sludge gas heat carriers to be classified low temperature pyrogenation system and method, including the distributing device for stirring former and being connected to stirring former outlet end, the outlet end of distributing device is arranged in the surface of porous metals band, the transmission direction of porous metals band passes through dry reactor, pyrolysis reactor and dry coke quenching reactor successively, and porous metals end of tape stretches out dry coke quenching reactor for exporting semicoke；By part semicoke back-mixing, aftershaping is stirred with raw sewage, mud granule layer cloth is carried out in porous metals band, in a manner of gas heat carrier classification pyrolysis, in conjunction with system process such as Dry Quenching, tar recycling, pyrolysis gas reuses, realize pyrolyzing sludge system modular, multiple dust suppression reduces tar dust content, improve added value of product, reduce the energy consumption of pyrolyzing sludge, the moisture in sludge has been recycled, has substantially reduced seriously polluted pyrolysis phenol wastewater water, the economy of technique is made to be obviously improved.
Description
Technical field
The invention belongs to technical field of sludge disposal more particularly to a kind of sewage sludge gas heat carrier to be classified low temperature pyrogenation system
And method.
Background technology
With the rising year by year of wastewater treatment in China rate, it is enriched 50% or more heavy metal and 90% or more in sewage and causes a disease
The sludge yield of microorganism is increasing, if cannot effectively dispose, the extent of injury will be very serious, and country puts into effect in recent years《Water
Prevention and cure of pollution action plan》Multinomial policies such as (i.e. " ten, water "), emphasizes that sludge must be disposed properly.Pyrolytic technique, i.e.,
Sludge is heated under anaerobic or anoxia condition, by heat and mass transfer process, obtains pyrolysis gas, tar, semicoke.The pyrolysis skill of sludge
Compared to other disposal technologies, the economical good, advantages such as pollutant emission is few, thermal decomposition product Exploitative potential is big have become art
For research hotspot.
General sewage plant needs the dewatered sludge moisture content disposed 80% or so, if being directly pyrolyzed, energy consumption is huge, and
It generates and is largely pyrolyzed waste water containing phenol, it is seriously polluted.If cooling down semicoke using modes such as water spray, water seals, it equally will produce and be difficult to
The highly concentrated phenol wastewater of disposition.Some patented technologies are pyrolyzed using solid thermal carriers, external-heat, there are mass-and heat-transfer unevenness, are set
The problems such as standby abrasion is big, the thermal efficiency is low, processing capacity is small, the reaction time is long.In addition, the one of limitation pyrolyzing sludge technical industry
A major reason is in tar that dust content is excessively high, big using difficulty, has seriously affected the economy of technique.
Invention content
In order to solve the problems in the existing technology, the object of the present invention is to provide a kind of classifications of sewage sludge gas heat carrier
Semicoke back-mixing is stirred aftershaping by low temperature pyrogenation system and method with raw sewage, and mud granule layer cloth is carried out in porous metals band
Material, in conjunction with system process such as Dry Quenching, tar recycling, pyrolysis gas reuses, is realized in a manner of gas heat carrier classification pyrolysis
Pyrolyzing sludge system modular, multiple dust suppression reduce tar dust content, improve added value of product, reduce sludge
The energy consumption of pyrolysis, has recycled the moisture in sludge, substantially reduces seriously polluted pyrolysis phenol wastewater water, makes the economy of technique
Property is obviously improved.
To achieve the goals above, the technical solution adopted by the present invention is a kind of sewage sludge gas heat carrier classification Low Temperature Thermal
The outlet end setting of solution system, including stirring former and the distributing device for being connected to stirring former outlet end, distributing device exists
The transmission direction of the surface of porous metals band, porous metals band passes through dry reactor, pyrolysis reactor and dry coke quenching successively
Reactor, and porous metals end of tape stretches out dry coke quenching reactor for exporting semicoke.
The gas outlet end of the dry reactor is sequentially connected water cooling dust arrester and cooling de-watering device, in dry reactor
Cyclic drying flue gas the cloth gas chamber of dry coke quenching reactor, dry coke quenching reaction are sent into after water cooling dust arrester and cooling de-watering device
The heat smoke that cyclic drying flue gas and hot-blast stove provide in device is connected to dry gas mixing chamber, dry gas mixing chamber by pipeline
It is connected to air distribution plate, air distribution plate is arranged in dry reactor and below porous metals band；
Hot-blast stove output end is connected to cooled coal gas and matches greenhouse, and cooled coal gas is connected to the gas input of pyrolysis reactor with greenhouse
End, the gas output end of pyrolysis reactor are connected with high-temperature gas-solid piece-rate system and coke tar recovery system in turn, contain tar gas
Waste pyrolysis gas in high-temperature gas-solid piece-rate system after dedusting enter coke tar recovery system in trap tar.
The gas output end of coke tar recovery system is connected to cooled coal gas and matches greenhouse, and coke tar recovery system matches greenhouse with cooled coal gas
Between be connected with cooled coal gas wind turbine.
Dry quenching wind turbine is connected between the water cooling dust arrester and cooling de-watering device.
The initiating terminal of the porous metals band stretches out the reaction chamber of dry reactor.
A kind of sewage sludge gas heat carrier classification low temperature pyrogenation method specifically includes following steps with above-mentioned pyrolysis system：
Step 1：Dewatered sludge is thoroughly mixed uniformly with by the sludge semicoke of dry coke quenching in stirring former
It obtains mixture and is shaped to mud granule in stirring former；Then by cloth system by mud granule in porous metals
It takes and is laid in the bed of material；
Step 2：After the bed of material is laid with, rotation porous metals band drives mud granule to enter dry reactor, by 105
~200 DEG C of cyclic drying flue gas is passed through dry reactor, with mud granule be in direct contact to mud granule be dried to containing
Water rate is less than 20%；
Step 3：Mud granule after drying enters pyrolysis reactor with porous metals band, by 450~700 DEG C of load
The cloth gas chamber that hot gas is passed through pyrolysis reactor lower part is uniformly dispersed, and is in direct contact and is pyrolyzed with the mud granule after drying, when
When the lattice gold tar yield of material is less than 1%, pyrolysis is completed；
Step 4：It is pyrolyzed the semicoke completed and enters dry coke quenching reactor progress dry coke quenching with porous metals band.
In the step 1, the dewatered sludge include moisture content be 70%~90% municipal sludge and industrial sludge,
Dewatered sludge is mixed with by the sludge semicoke of dry coke quenching, and controls the moisture content of mixture below 70%；Mud granule
Grain size is 2mm~20mm, and thickness of feed layer is less than 2000mm, and the aperture of porous metals band is less than the grain size of mud granule.
In the step 2, flue gas mixes with the part heat smoke that hot-blast stove provides in dry gas mixing chamber after quenching
Even to obtain cyclic drying flue gas, during mud granule is dried, the cyclic drying flue gas for flowing through the bed of material is mingled with dampening
Point, fine dust particles enter water cooling dust arrester, deviate from after dust particles and partial moisture by dry quenching wind turbine pressurization and cold
But after dehydrater water removal, cyclic drying flue gas enters dry coke quenching reactor by air distribution plate, with the heat half in dry coke quenching reactor
Flue gas after quenching is obtained after burnt contact heat-exchanging, flue gas enters dry gas mixing chamber after quenching.
In the step 3, the part heat smoke of hot-blast stove forms heat-carrying with cooled coal gas after matching temperature during cooled coal gas is with greenhouse
Gas, heat-carrying gas is mingled with during fine dust flows through material bed and collides and inhale with the mud granule in material bed in pyrolytic process
Attached, part fine dust is trapped, and remaining dust enters high-temperature gas-solid piece-rate system with the pyrolysis gas containing tar gas and is removed；It
Afterwards, pyrolysis gas enters coke tar recovery system recycling tar, while being cooled to 30~80 DEG C and obtaining cooled coal gas.
In the step 3, the heat source of hot-blast stove is natural gas or liquefied gas, and pyrolysis gas passes through high-temperature gas-solid piece-rate system
The cooled coal gas obtained with coke tar recovery system provides dry, pyrolytic process institute calorific requirement as supplemental heat source, joint.
Compared with existing pyrolyzing sludge technology, the present invention at least has the advantages that：By semicoke back-mixing, reduce
The moisture content of dewatered sludge, the load for reducing desiccation and being subsequently pyrolyzed；It is classified by desiccation, pyrolysis, the outer water of recyclable sludge,
The yield of phenol wastewater in pyrolytic process is reduced, energy consumption is reduced, shortens pyrolysis time；De-, the material bed collision by dry air-blowing
The multiple actions such as absorption, high-temperature gas-solid separation, realize efficiently separating for fine dust, promote tar quality；Desiccation, pyrolysis, quenching
Close connection, conveying cost are small；Each link is internal heat type direct heat transfer, and mass transfer is uniform, and heat transfer is efficient；Dry air and heat solution coal gas
It recycles, material is brief；It includes that roller bearing, dry quenching wind turbine, cooled coal gas wind turbine etc. are arranged at low-temperature space that system, which moves equipment,
Tar in gas, water content are low, move the stable and reliable operation of equipment, and abrasion is small.
The system of the present invention realizes classification pyrolysis, because the phenol content of pyrolysis waste water is very high, intractability is larger, this
Processing is dried in sludge by invention in dry reactor first, can be good at reducing moisture contained in mud granule,
And not making wherein a large amount of fugitive constituent effusion, the sewage generated at this time is easier to make for treatment for reuse, for subsequent pyrolysis
For process, it is capable of the reduction energy consumption of high degree, and shortens the time of pyrolysis, improve efficiency, reduces pyrolysis waste water
It generates, reduces cost for wastewater treatment, environment-friendly advantage is apparent；Using roller bearing drive porous metals band, and then drive the bed of material move into
Row pyrolysis, when pyrolysis gas passes through the bed of material, dust therein can realize collision with the bed of material, adsorb from dedusting, reduce into follow-up
Workshop section's fine dust total amount, reduces follow-up dedusting link load, reduces sludge tar dust content, promotes its quality, while desiccation,
Pyrolysis, quenching closely link, and energy recovery rate is high, save material and convey cost；In the quenching stage, the present invention is put out using dry method
Coke does not generate the sewage that wet quenching is difficult to dispose, and semicoke quality is more preferable；In addition, the gas heat carrier in the present invention is direct
It is contacted with sludge and carries out desiccation, pyrolysis and quenching, good effect of heat exchange, it is easy to accomplish the separation of dust, moisture, and desiccation, pyrolysis
Gas, which realizes, to be recycled, and efficiency is high, and industrialization difficulty is small；It is further, dry that quenching wind turbine and cooled coal gas wind turbine etc. are dynamic sets
Standby to be arranged at low-temperature space, component mechanically deform is small, and the tar of low-temperature space or water content are relatively low, reduces the mill of equipment
Damage ensure that the reliable and stable of equipment operation.The invention also achieves dry quenching, the double gas circuit cycles of pyrolytic incineration, can be right
Gas material in the course of work is adequately recycled, and the further energy and material consumption that reduces improves efficiency.
Description of the drawings
Fig. 1 is the system structure diagram of the present invention.
Fig. 2 is the material bed structure schematic diagram that mud granule is formed in the present invention.
Structural schematic diagrams of the Fig. 3 between porous metals band and each reactor.
In attached drawing：1. stirring former, 2. distributing devices, 3. dry reactors, 4. pyrolysis reactors, the reaction of 5. dry coke quenching
Device, 6. water cooling dust arresters, 7. drying quenching wind turbines, 8. cooling de-watering devices, 9. drying gas mixing chambers, 10. high-temperature gas-solid segregative lines
System, 11. coke tar recovery systems, 12. cooled coal gas wind turbines, 13. hot-blast stoves, 14. cooled coal gas match greenhouse, 31. porous metals bands, 311.
Roller bearing, the 32. sludge bed of materials, 33. air distribution plates, 34. heat carrier imports, 35. heating medium outlets, 101. sewage sludge feeds.
Specific implementation mode
Technical scheme of the present invention is described further with reference to the accompanying drawings and examples.
The present invention includes molding-cloth system, drying-dry quenching system, pyrolysis system and separation-recovery system, wherein
In molding-cloth system, dewatered sludge is thoroughly mixed with by Dry Quenching, non-hypergolic semicoke, is made spherical
Grain is distributed in certain thickness on the porous metals band of roller bearing transmission, and into drying-dry quenching system, heat smoke passes through drying
Cloth gas chamber below reactor and porous metals band, pass through material bed, take away moisture and fine dust particles；Aqueous, dust-laden heat smoke
It after the cyclone separator of indirect water-cooling, pressurizes by wind turbine, the cloth gas chamber that dry coke quenching reactor is sent into from top is put out
Coke, after passing through semicoke and porous metals band, the dry flue gas by cooling enters dry gas mixing chamber and the portion from hot-blast stove
Divide flue gas mixing, into dry reactor, forms cycle.By dry sludge, with porous metals band, it is into pyrolysis
System；Heat smoke in hot-blast stove is most of to be mixed with greenhouse in cooled coal gas with cooled coal gas all the way other than supplementing dry gas on a small quantity
Afterwards, by the cloth gas chamber of pyrolysis reactor lower part and porous metals band, pyrolysis is come into full contact with sludge；Pyrolysis containing tar gas
Gas is dusted into separation-recovery system at the top of pyrolysis reactor, recycles tar, and clean cooled coal gas draft fan is all the way
It is sent into hot-blast stove and burns recycling heat, institute's heat production flue gas is used for drying, pyrolysis；It is sent into cooled coal gas all the way with greenhouse with temperature, richness
Waste heat, which is vented one's spleen, to be sent outside.
As shown in Figure 1, Figure 2 and Figure 3, system of the invention includes stirring former 1 and being connected to stirring former 1
The distributing device 2 at mouth end, the outlet end of distributing device 2 is arranged in the surface of porous metals band 31, the transmission side of porous metals band 31
To successively pass through dry reactor 3, pyrolysis reactor 4 and dry coke quenching reactor 5, and 31 end of porous metals band stretch out dry coke quenching
Reactor 5 stretches out the reaction chamber of dry reactor 3 for exporting semicoke, the initiating terminal of porous metals band 31；
The gas outlet end of dry reactor 3 is sequentially connected water cooling dust arrester 6 and cooling de-watering device 8, and dry reactor 3 produces
Raw dry flue gas is sent into the cloth of dry coke quenching reactor 5 after water cooling dust arrester 6, dry quenching wind turbine 7 and cooling de-watering device 8
Gas chamber, the part heat smoke that the circulating flue gas and hot-blast stove 13 generated in dry coke quenching reactor 5 provides are connected to by pipeline
Dry gas mixing chamber 9, dry gas mixing chamber 9 are connected to the air distribution plate 33 of 31 lower section of porous metals band；
13 main line of hot-blast stove and one pipeline of cooled coal gas are connected to cooled coal gas and match greenhouse 14, coke tar recovery system 11 with it is cold
Coal gas is connected with cooled coal gas wind turbine 12 between matching greenhouse 14；Cooled coal gas is connected to the gas input of pyrolysis reactor 4 with greenhouse,
The gas output end of pyrolysis reactor 4 is connected with high-temperature gas-solid piece-rate system 10 and coke tar recovery system 11 in turn, contains tar
The waste pyrolysis gas of gas enters after dedusting in coke tar recovery system 11 in high-temperature gas-solid piece-rate system 10 traps tar；
System using the present invention carries out sewage sludge gas heat carrier classification low temperature pyrogenation and is as follows：
(1) first, moisture content is being stirred with part by the sludge semicoke of dry coke quenching in 70%~90% dewatered sludge
Mix to be thoroughly mixed in former 1 and uniformly obtain mixture, mix the moisture content of obtained mixture 70% hereinafter, and
Temperature by the sludge semicoke of dry coke quenching is 60~100 DEG C, and is shaped to grain size in 2mm~20mm in stirring former 1
Between mud granule；Cloth system 2 is utilized later, and molding mud granule, which is uniformly laid on aperture, is less than its particle size
Porous metals band on, formed thickness be 2~2000mm the bed of material；
In this step, the sludge semicoke by dry coke quenching being previously mentioned is this system material outlet end by dry coke quenching
The mud granule of process, this partial sludge particle partial reflux to feed stage carry out the mixing of material with dewatered sludge, into one
Step reduces the moisture content of dewatered sludge, so that dewatered sludge is had better physicochemical property, can be molded cloth, formed grain bed from
And it is dried and pyrolytic reaction so that heat carrier comes into full contact with material, reduces pressure drop and reaches better heat and mass effect.
(2) pass through roller bearing so that metal belt transmission drives mud granule to enter dry reactor 3, cyclic drying gas and heat
The part heat smoke that wind furnace 13 provides is uniformly mixed in dry gas mixing chamber 9 and heats up to cyclic drying flue gas, and temperature is 105~
200 DEG C, enter dry reactor 3 later, cyclic drying flue gas is in direct contact with mud granule, in specific embodiments of the present invention
In, the cyclic drying flue-gas temperature of (gas vent being connected to water cooling dust arrester 6) is exported at 50~120 DEG C, is then mingled with
Moisture, the cyclic drying flue gas of fine dust particles enters water cooling dust arrester 6, abjection dust particles and partial moisture, meeting simultaneously
30~50 DEG C are cooled to, after the dry pressurization of quenching wind turbine 7 and cooling de-watering device 8 remove water and discharge off-gas, cyclic drying
Flue gas enters dry coke quenching reactor 5 by the air distribution plate for being arranged at the top of dry coke quenching reactor 5 or bottom, with 500 DEG C or so
Dry gas mixing chamber 9 is delivered to after hot semicoke direct contact heat transfer；Mud granule drying in dry reactor 3 is small to moisture content
In 20%, the drying to mud granule is completed；
(3) mud granule enters pyrolysis reactor 4 with porous metals band；Using with natural gas or liquefied gas as heat source, it is cold
For coal gas as supplemental heat source, joint provides heat smoke institute calorific requirement；Heat smoke matches temperature with greenhouse 14 in cooled coal gas by cooled coal gas
After obtain heat-carrying gas, temperature is at 450~700 DEG C, and the cloth gas chamber for initially entering 4 lower part of pyrolysis reactor is uniformly dispersed, Zhi Houyu
Dry mud granule is in direct contact；Since the bed of material has certain thickness, and a medium density, dryer section is not removed and newly generated
Fine dust collides adsorption effect during following air-flow to move upwards with mud granule, and part fine dust is trapped, portion
Dust is divided to enter 10 quilt of high-temperature gas-solid piece-rate system with the pyrolysis gas (heat-carrying gas forms pyrolysis gas after pyrolysis) containing tar gas
It removes；Pyrolysis gas enters the recycling tar of coke tar recovery system 11 later, while being cooled to 30~80 DEG C and obtaining cooled coal gas, through supercooling
After gas fan 12, part reuse burns and with temperature, and gas circulation is completed in discharge system disposition in part；When positioned at pyrolytic reaction
When the lattice gold tar yield of semicoke in device 4 is below 1%, pyrolysis is completed；Porous metals band 31 send the semicoke that pyrolysis is completed
Enter in dry coke quenching reactor, dry coke quenching reactor 5 controls the temperature of mud granule at 80 DEG C or less.
It is reasonable by the sludge semicoke temperature setting of dry coke quenching, then VOC will not be caused to escape because of temperature is excessively high, with dehydration
The physicochemical characteristic of material is more preferable after sludge mixing；In dryer section, drier is contacted with material has taken away part fine dust, alleviates
Follow-up dedusting pressure；The grain size of mud granule need to be arranged rationally, and grain size is too small to cause gas pressure drop excessive, heat and mass effect
Fruit, dust removing effects are poor, and grain size is excessive, and desiccation pyrolysis can be caused insufficient, elongate pyrolysis time, reduce reactor disposing capacity.
As shown in Fig. 2, in pyrolytic process, the bed of material forms the grain bed with filtration, can be by colliding, inhaling
Fine dust is trapped in grain bed by the effects that attached, electrostatic, and fine dust is avoided to enter follow-up workshop section with pyrolysis gas, and reduction subsequently removes
Dirt, tar recycle section load.
The a certain specific embodiment of the present invention, the dewatered sludge of moisture content 70%~90% and 60~100 DEG C of semicoke exist
It stirs in former according to mass ratio (0.5~5):1 is thoroughly mixed, and is shaped to the mud granule of grain size 3mm, equivalent
Aperture is cloth on the porous alloy steel of 2mm, and bed of material width is 2m, thickness 20mm.It is dry with 150 DEG C after material enters dryer section
Dry flue gas is in direct contact, and heat smoke outlet temperature maintains 100 DEG C, and residence time 70min, moisture percentage in sewage sludge is down to 10%, then
Into pyrolysis reactor.In pyrolysis reactor, sludge comes into full contact with 550 DEG C of heat smoke, and sludge retention time 80min contains
The temperature that the waste pyrolysis gas of tar gas goes out reactor is 480 DEG C, and gumming is gone by high-temperature gas-solid piece-rate system, coke tar recovery system
Dirt and collection tar, discharge system carries out energy regenerating recycling after the pyrolysis gas without tar is cooled to 50 DEG C.It is later half
Coke enters dry quenching system, and cooling, residence time are in direct contact with 30 DEG C of dry flue gas through supercooling, dedusting, water removal
30min, semicoke are cooled to 80 DEG C, 60 DEG C of cyclic drying flue gas exit temperature.
Claims (10)
1. a kind of sewage sludge gas heat carrier is classified low temperature pyrogenation system, which is characterized in that including stirring former (1) and connection
Stirring former (1) outlet end distributing device (2), distributing device (2) outlet end setting porous metals band (31) just on
The transmission direction of side, porous metals band (31) passes through dry reactor (3), pyrolysis reactor (4) and dry coke quenching reactor successively
(5), and dry coke quenching reactor (5) is stretched out for exporting semicoke in porous metals band (31) end.
2. a kind of sewage sludge gas heat carrier according to claim 1 is classified low temperature pyrogenation system, which is characterized in that described dry
The gas outlet end of dry reactor (3) is sequentially connected water cooling dust arrester (6) and cooling de-watering device (8), in dry reactor (3)
Cyclic drying flue gas is sent into the cloth gas chamber of dry coke quenching reactor (5) after water cooling dust arrester (6) and cooling de-watering device (8), does
The heat smoke that cyclic drying flue gas and hot-blast stove (13) provide in quenching reactor (5) is connected to dry gas by pipeline and mixes
Room (9), dry gas mixing chamber (9) are connected to air distribution plate (33), and air distribution plate (33) is arranged in dry reactor (3) and positioned at more
Below mesoporous metal band (31)；
Hot-blast stove (13) output end is connected to cooled coal gas and matches greenhouse (14), and cooled coal gas is connected to pyrolysis reactor with greenhouse (14)
(4) gas output end of gas input, pyrolysis reactor (4) is connected with high-temperature gas-solid piece-rate system (10) and tar in turn
Recovery system (11), the waste pyrolysis gas containing tar gas enter tar recycling system in high-temperature gas-solid piece-rate system (10) after dedusting
Uniting, (11) are middle to trap tar.
3. a kind of sewage sludge gas heat carrier according to claim 2 is classified low temperature pyrogenation system, which is characterized in that tar returns
The gas output end of receipts system (11) is connected to cooled coal gas and matches greenhouse (14), and coke tar recovery system (11) matches greenhouse with cooled coal gas
(14) cooled coal gas wind turbine (12) is connected between.
4. a kind of sewage sludge gas heat carrier according to claim 2 is classified low temperature pyrogenation system, which is characterized in that the water
Dry quenching wind turbine (7) is connected between cold dust arrester (6) and cooling de-watering device (8).
5. a kind of sewage sludge gas heat carrier according to claim 1 is classified low temperature pyrogenation system, which is characterized in that described more
The initiating terminal of mesoporous metal band (31) stretches out the reaction chamber of dry reactor (3).
6. a kind of sewage sludge gas heat carrier is classified low temperature pyrogenation method, which is characterized in that using any one of claim 1 to 5 institute
The pyrolysis system stated, specifically includes following steps：
Step 1：Dewatered sludge is thoroughly mixed uniformly with the sludge semicoke by dry coke quenching in stirring former (1)
It obtains mixture and is shaped to mud granule in stirring former (1)；Then by cloth system (2) by mud granule more
Mesoporous metal band is laid in the bed of material on (31)；
Step 2：After the bed of material is laid with, rotation porous metals band (31) drives mud granule to enter dry reactor (3), will
105~200 DEG C of cyclic drying flue gas is passed through dry reactor (3), is in direct contact with mud granule and is done to mud granule
It is dry to moisture content be less than 20%；
Step 3：Mud granule after drying enters pyrolysis reactor (4) with porous metals band, by 450~700 DEG C of heat-carrying
The cloth gas chamber that gas is passed through pyrolysis reactor (4) lower part is uniformly dispersed, and is in direct contact and is pyrolyzed with the mud granule after drying, when
When the lattice gold tar yield of material is less than 1%, pyrolysis is completed；
Step 4：It is pyrolyzed the semicoke completed and enters dry coke quenching reactor (5) progress dry coke quenching with porous metals band (31).
7. a kind of sewage sludge gas heat carrier according to claim 6 is classified low temperature pyrogenation method, which is characterized in that the step
In rapid one, the dewatered sludge include moisture content be 70%~90% municipal sludge and industrial sludge, dewatered sludge with pass through
The sludge semicoke of dry coke quenching mixes, and controls the moisture content of mixture below 70%；The grain size of mud granule be 2mm~
20mm, thickness of feed layer are less than 2000mm, and the aperture of porous metals band (31) is less than the grain size of mud granule.
8. a kind of sewage sludge gas heat carrier according to claim 6 is classified low temperature pyrogenation method, which is characterized in that the step
In rapid two, flue gas is uniformly mixed to obtain with the part heat smoke that hot-blast stove (13) provides in dry gas mixing chamber (9) after quenching
Cyclic drying flue gas, during mud granule is dried, the cyclic drying flue gas for flowing through the bed of material is mingled with moisture, fine powder
Dirt particle enters water cooling dust arrester (6), pressurizes by dry quenching wind turbine (7) after deviating from dust particles and partial moisture and cooling
After dehydrater (8) water removal, cyclic drying flue gas enters dry coke quenching reactor (5) by air distribution plate, and in dry coke quenching reactor (5)
Hot semicoke contact heat-exchanging after obtain flue gas after quenching, flue gas enters dry gas mixing chamber (9) after quenching.
9. a kind of sewage sludge gas heat carrier according to claim 6 is classified low temperature pyrogenation method, which is characterized in that the step
In rapid three, the part heat smoke of hot-blast stove (13) forms heat-carrying gas, heat with cooled coal gas after matching temperature during cooled coal gas is with greenhouse (14)
Heat-carrying gas is mingled with during fine dust flows through material bed and collides and adsorb with the mud granule in material bed in solution preocess, portion
Fine dust is divided to be trapped, remaining dust enters high-temperature gas-solid piece-rate system (10) with the pyrolysis gas containing tar gas and is removed；It
Afterwards, pyrolysis gas enters coke tar recovery system (11) recycling tar, while being cooled to 30~80 DEG C and obtaining cooled coal gas.
10. a kind of sewage sludge gas heat carrier according to claim 6 is classified low temperature pyrogenation method, which is characterized in that described
In step 3, the heat source of hot-blast stove (13) is natural gas or liquefied gas, and pyrolysis gas passes through high-temperature gas-solid piece-rate system (10) and coke
The cooled coal gas that oil recovery system (11) obtains provides dry, pyrolytic process institute calorific requirement as supplemental heat source, joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615958.XA CN108529844B (en) | 2018-06-14 | 2018-06-14 | Graded low-temperature pyrolysis system and method for sludge gas heat carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615958.XA CN108529844B (en) | 2018-06-14 | 2018-06-14 | Graded low-temperature pyrolysis system and method for sludge gas heat carrier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108529844A true CN108529844A (en) | 2018-09-14 |
| CN108529844B CN108529844B (en) | 2024-06-25 |
Family
ID=63471016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810615958.XA Active CN108529844B (en) | 2018-06-14 | 2018-06-14 | Graded low-temperature pyrolysis system and method for sludge gas heat carrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108529844B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110354741A (en) * | 2018-10-09 | 2019-10-22 | 新能能源有限公司 | Hydrogasification semicoke pulping device and its stable operation method |
| CN110845114A (en) * | 2019-12-20 | 2020-02-28 | 中原晟启新能源装备有限公司 | Continuous sludge dewatering and drying system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1522569A2 (en) * | 2003-10-10 | 2005-04-13 | Circutec Focus on Future GmbH | Process, devices and plant for pyrolising of waste for producing syngas |
| CN102765866A (en) * | 2012-07-23 | 2012-11-07 | 扬州澄露环境工程有限公司 | Method for recycling urban sludge |
| CN103421521A (en) * | 2013-08-07 | 2013-12-04 | 陕西煤业化工技术研究院有限责任公司 | Device and method for preparing pulverized coal with low energy consumption |
| CN104152163A (en) * | 2014-08-01 | 2014-11-19 | 神华集团有限责任公司 | Crushed coal pyrolysis and coke dry quenching method and device |
| CN105038826A (en) * | 2015-07-10 | 2015-11-11 | 北京柯林斯达科技发展有限公司 | Belt furnace pyrolysis apparatus and belt furnace pyrolysis process |
| CN106190205A (en) * | 2016-07-27 | 2016-12-07 | 中国重型机械研究院股份公司 | A kind of pyrolytic process method utilizing semicoke convection drying fine coal |
| CN208562102U (en) * | 2018-06-14 | 2019-03-01 | 陕西煤业化工技术研究院有限责任公司 | A kind of sewage sludge gas heat carrier classification low temperature pyrogenation system |
-
2018
- 2018-06-14 CN CN201810615958.XA patent/CN108529844B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1522569A2 (en) * | 2003-10-10 | 2005-04-13 | Circutec Focus on Future GmbH | Process, devices and plant for pyrolising of waste for producing syngas |
| CN102765866A (en) * | 2012-07-23 | 2012-11-07 | 扬州澄露环境工程有限公司 | Method for recycling urban sludge |
| CN103421521A (en) * | 2013-08-07 | 2013-12-04 | 陕西煤业化工技术研究院有限责任公司 | Device and method for preparing pulverized coal with low energy consumption |
| CN104152163A (en) * | 2014-08-01 | 2014-11-19 | 神华集团有限责任公司 | Crushed coal pyrolysis and coke dry quenching method and device |
| CN105038826A (en) * | 2015-07-10 | 2015-11-11 | 北京柯林斯达科技发展有限公司 | Belt furnace pyrolysis apparatus and belt furnace pyrolysis process |
| CN106190205A (en) * | 2016-07-27 | 2016-12-07 | 中国重型机械研究院股份公司 | A kind of pyrolytic process method utilizing semicoke convection drying fine coal |
| CN208562102U (en) * | 2018-06-14 | 2019-03-01 | 陕西煤业化工技术研究院有限责任公司 | A kind of sewage sludge gas heat carrier classification low temperature pyrogenation system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110354741A (en) * | 2018-10-09 | 2019-10-22 | 新能能源有限公司 | Hydrogasification semicoke pulping device and its stable operation method |
| CN110845114A (en) * | 2019-12-20 | 2020-02-28 | 中原晟启新能源装备有限公司 | Continuous sludge dewatering and drying system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108529844B (en) | 2024-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102517054B (en) | Device and method for continuous pyrolysis of agricultural and forestry biomass and fractional collection and purification of product | |
| CN104152162B (en) | The pyrolysis system of broken coal pyrolysis and broken coal pyrolysis produce semicoke, the device and method of burnt oil and gas | |
| CN104130790B (en) | A kind of coal carbonization technology of indirect heat exchange | |
| CN103980912B (en) | A kind of brown coal method for destructive distillation and device | |
| CN101440323A (en) | Drying and moulding integrated process for low rank coal | |
| CN205717225U (en) | A kind of mud hydro-thermal dehydration, mummification and pyrolyzing, gasifying and incinerating combination unit | |
| CN104164244A (en) | Coal full-grain size grading pyrolysis and active coke preparation coupling process and system in coal gas circulating | |
| CN101289621B (en) | Process for preparing carbocoal, coke tar and coal gas by treating bovey coal by suspending pyrogenation device | |
| CN105737167B (en) | Heat accumulating type rotating bed segmentation utilizes the method and system of carbonaceous organic material thermal decomposition product | |
| CN109055726A (en) | A kind for the treatment of process of rotary hearth furnace zinc-containing dust | |
| CN106433718B (en) | Method and device for preparing semi-coke, tar and coal gas from coal | |
| CN104789244A (en) | Gas-circulating method for pyrolysis production of anthracite in coal powder rotary furnace | |
| CN102965170A (en) | Energy-saving environment-friendly lignite briquette preparation technology and system | |
| CN208562102U (en) | A kind of sewage sludge gas heat carrier classification low temperature pyrogenation system | |
| CN108529844A (en) | A kind of sewage sludge gas heat carrier classification low temperature pyrogenation system and method | |
| CN105621410A (en) | Activated carbon production process | |
| CN105148886A (en) | Automatic production line for powdered activated carbon regeneration | |
| CN205007981U (en) | Palingenetic automation line of powdered activated carbon | |
| CN112625720B (en) | Cross-flow type coal mixing pyrolysis method and pyrolysis device | |
| CN205347185U (en) | Hot -blast mud fluidized bed mummification device that spouts | |
| CN218778887U (en) | Circular internal heating type vertical carbonization furnace for low-rank coal for magnesium smelting | |
| CN107641520A (en) | A kind of method that lump coal charing production semi-coke is carried out with vertical type round kiln | |
| CN105907413B (en) | The low temperature distillation technique of low order fine coal | |
| CN104004533B (en) | A kind of little granule shale gas heat carrier distillation process | |
| CN111533426A (en) | Sludge drying and dewatering equipment and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |