CN115451421A - Integrated process and equipment for conveying sludge or peat dried and crushed materials - Google Patents
Integrated process and equipment for conveying sludge or peat dried and crushed materials Download PDFInfo
- Publication number
- CN115451421A CN115451421A CN202211084179.4A CN202211084179A CN115451421A CN 115451421 A CN115451421 A CN 115451421A CN 202211084179 A CN202211084179 A CN 202211084179A CN 115451421 A CN115451421 A CN 115451421A
- Authority
- CN
- China
- Prior art keywords
- fluidized bed
- circulating fluidized
- sludge
- particles
- drying
- 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.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 43
- 239000000463 material Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008569 process Effects 0.000 title claims abstract description 23
- 239000003415 peat Substances 0.000 title claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 91
- 238000001035 drying Methods 0.000 claims abstract description 57
- 239000000843 powder Substances 0.000 claims abstract description 33
- 239000000428 dust Substances 0.000 claims abstract description 30
- 239000003245 coal Substances 0.000 claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims abstract description 15
- 238000003860 storage Methods 0.000 claims abstract description 5
- 230000000737 periodic effect Effects 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 239000002893 slag Substances 0.000 claims description 22
- 230000009471 action Effects 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 10
- 238000012546 transfer Methods 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000002776 aggregation Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 238000005054 agglomeration Methods 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
- F23K2201/101—Pulverizing to a specific particle size
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/20—Drying
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses an integrated process and equipment for drying and crushing sludge or peat and conveying materials, which relate to the technical field of material supply and comprise the following steps: feeding pre-fluidized powder with set quality into the circulating fluidized bed, taking secondary air of a boiler as a supply source of fluidized air, adjusting the circulating fluidized bed to enter a pre-fluidized running state, and forming a high-speed particle source; inputting the coal slime or sludge source particles processed by the extruder equipment into a pre-fluidized circulating fluidized bed, merging fine powder flow reaching the cutting particle size into a secondary air pipeline, and feeding the fine powder flow into a boiler; the particles with the granularity meeting the set requirement enter a supersonic mill, the particles enter a crushing chamber through a blanking port after being rectified by a screen, the crushed fluidized substances are directly merged into a secondary air pipeline and are conveyed to a boiler, or after being filtered by a bag-type dust collector, the dried materials enter a powder bin for periodic storage. The drying process is quick, safe and reliable; the occupied area is small, and the process layout is compact; the tail gas is clean, the flow is small, the drying cost is low, and the dual effects of energy conservation and environmental protection are achieved.
Description
Technical Field
The invention relates to the technical field of material supply, in particular to an integrated process and equipment for conveying sludge or peat dried and crushed materials.
Background
The coal slime or sludge can be used in boiler for combustion, especially mixed with coal gangue and other low heat value coal, and this can reduce the consumption of clean coal and inhibit its resource utilization. Various drying technologies can effectively reduce the moisture content in the coal slime or the sludge and improve the heat productivity of the coal slime or the sludge, and the current main drying modes mainly comprise 3 major types of mechanical dehydration, evaporative dehydration and non-evaporative dehydration. The evaporation dehydration is the mainstream disposal process, and mainly comprises high-temperature drying and low-temperature drying.
High-temperature drying generally refers to drying under the environment of high-temperature flue gas at 600 ℃, and has the advantages of high drying strength, high processing capacity, stable operation, low maintenance cost and the like, but has the defects of high drying temperature, explosion hazard, large amount of dried tail gas, high dust content and the like; the low-temperature drying process mainly includes roller drying, steam tube array and mesh-belt continuous low-temperature dehumidification and drying, etc., and the roller drying process has the advantages of reliable equipment operation, strong overload resistance, simple operation, high heat efficiency, etc., and is adjacent to thermal power plants, and the heat medium of the low-temperature drying process is mostly changed into a four-stage steam extraction heat source of a steam turbine of the power plant. But because of adopting the downstream mode, the gas-solid two-phase downstream contact heat exchange has small contact area and needs to stay in the drier for a long time (8-12 min).
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a sludge or peat drying and crushing material conveying integrated process and equipment, based on the primary circulating fluidized bed collision crushing and low-temperature drying, the superposition of secondary airflow grinding and pulverization and low-temperature drying, gas-solid countercurrent contact, the mechanical collision cutting effect is greatly enhanced, the particles are quickly pulverized and dried, the defects of scaling, agglomeration and overlong drying time of coal slime or sludge in conventional low-temperature drying equipment are effectively avoided, and the drying process is quicker, safer and more reliable; meanwhile, the fluidized bed and the jet mill have less additional matched equipment, small occupied area and compact process layout; the tail gas is clean, the flow is small, the drying cost is low, and the dual effects of energy conservation and environmental protection are achieved.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the embodiment of the invention provides an integrated process for drying and crushing sludge or peat and conveying materials, which is based on the combination of primary circulating fluidized bed collision crushing and low-temperature drying, and the combination of superimposed secondary airflow grinding and low-temperature drying; the method comprises the following steps:
feeding pre-fluidized powder with set quality into the circulating fluidized bed, taking secondary air of a boiler as a supply source of fluidized air, adjusting the circulating fluidized bed to enter a pre-fluidized running state, and forming a high-speed particle source;
inputting the coal slime or sludge source particles processed by the extruder equipment into a pre-fluidized circulating fluidized bed, merging fine powder flow reaching the cutting particle size into a secondary air pipeline, and feeding the fine powder flow into a boiler;
the particles with the granularity meeting the set requirement enter a supersonic mill, the particles enter a crushing chamber through a blanking port after being rectified by a screen, the crushed fluidized substances are directly merged into a secondary air pipeline and are conveyed to a boiler, or after being filtered by a bag-type dust collector, the dried materials enter a powder bin for periodic storage.
As a further implementation mode, a secondary air inlet of the boiler at the throat of the circulating fluidized bed is opened firstly, secondary air with designed air quantity is fed, and then pre-fluidized powder meeting the granularity requirement is fed to the inlet of the circulating fluidized bed.
As a further realization mode, the granularity of the pre-fluidized powder is 500-800 microns, and the temperature of secondary air of the boiler is 300-350 ℃.
As a further implementation mode, the coal slime or sludge is conveyed to an extruder device through a bucket elevator and processed into source particles meeting the requirements of granularity and mass flow rate through the extruder device; the source particles enter the circulating fluidized bed through a conveying closed pipeline.
As a further implementation mode, under the combined action of collision and cutting of high-speed particles in the circulating fluidized bed, source particles and secondary air of the boiler are subjected to heat and mass transfer exchange, the particles are rapidly expanded and broken and are circularly impacted and cut, the particles are refined to a set particle size, are carried to a cyclone dust collector by air flow, are merged into a secondary air pipeline, and then are sent to the boiler.
As a further implementation mode, the particles which do not meet the requirement of the particle size are automatically returned to the circulating fluidized bed through an automatic return pipe of the cyclone dust collector under the action of gravity, and continuously participate in the collision cutting action of the high-speed particles.
The further implementation mode is that the steam turbine extracts steam or compressed nitrogen passes through a steam turbine steam extraction or compressed nitrogen inlet of the supersonic mill and then is sprayed out by a nozzle, the air flow intersection point and the coal slime or sludge particle falling path are designed coaxially, and the coal slime or sludge particles are further crushed under the action of high-speed impact, collision and friction of supersonic air flow.
In a second aspect, the embodiment of the invention also provides sludge or peat drying and crushing material conveying integrated equipment, which comprises a circulating fluidized bed, wherein a cyclone dust collector is connected in parallel to one side of the circulating fluidized bed; the circulating fluidized bed is provided with a pre-fluidized powder inlet, the top of the circulating fluidized bed is connected with extruder equipment through a conveying closed pipeline, the bottom of the circulating fluidized bed is connected with a supersonic mill, and a boiler secondary air inlet is arranged at the joint of the supersonic mill and the circulating fluidized bed; the input end of the extruder equipment is connected with the bucket elevator, and one side of the supersonic mill is communicated with the bag-type dust remover.
As a further realization mode, an electric ash discharge valve is arranged at the joint of the supersonic mill and the circulating fluidized bed;
the supersonic mill is internally provided with a conical blocking sieve plate, and the lower side of the conical blocking sieve plate is provided with a steam turbine steam extraction or compressed nitrogen inlet.
As a further implementation mode, the bottom of the supersonic mill is connected with a slag bin, and an electric slag tapping valve is installed at the outlet of the slag bin.
The invention has the following beneficial effects:
(1) According to the invention, based on primary circulating fluidized bed collision crushing and low-temperature drying, secondary airflow milling pulverization and low-temperature drying are superposed, and by means of the circulating fluidized crushing process, the violent collision-transmitting cutting composite action of high-speed particles on coal slime and sludge particles is strengthened; the contact area between the particles refined by the primary fluidized bed and the low-temperature heat source is greatly increased, and the heat transfer and mass transfer effects between the particles refined by the primary fluidized bed and the low-temperature heat source and between the particles refined by the primary fluidized bed and the high-speed particles are synchronously promoted; the two are complementary, the defects of moisture absorption, scaling, agglomeration, aggregation, long drying time and the like of the conventional low-temperature drying mode are obviously improved, and the drying process is quicker, safer and more reliable.
(2) By means of the constructed secondary supersonic grinding process, on one hand, the contact area of powder particles and a low-temperature heat source is greatly increased again, the particles are dried completely, the heat value is obviously improved, the particles can be directly stored in a warehouse as standby fuel or sprayed into a hearth as fuel powder, the particles are promoted to be fully combusted, harmful elements are converted into mineral phase slag to be thoroughly treated, secondary pollutants derived from dioxin and the like generated by low-temperature incineration are reduced, and the environment-friendly effect is obviously improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of an equipment configuration according to one or more embodiments of the present invention.
The system comprises a bucket elevator 1, an extruder 2, a cutter 3, an extrusion particle mold 4, a conveying closed pipeline 5, a circulating fluidized bed feeding port 6, a prefluidized powder inlet 7, a circulating fluidized bed 8, a boiler secondary air inlet 9, an electric ash discharge valve 10, an ultrasonic mill 11, an outlet 12, a cyclone dust collector 13, an automatic return pipe 14, an electric slag discharge valve 15, a conical blocking sieve plate 16, a turbine steam extraction or compression nitrogen inlet 17, an exhaust pipeline 18, a bag dust collector 19, an electric slag discharge valve 20, a slag bin 21, a pneumatic ash conveying system 22, an electric slag discharge valve 23 and an automatic control system 24.
Detailed Description
The first embodiment is as follows:
the embodiment provides a sludge or peat drying and crushing material conveying integrated process, which has the characteristics of two-step crushing, heat transfer and mass transfer, and is based on the collision crushing and low-temperature drying of a primary circulating fluidized bed, the superposition of secondary airflow grinding and pulverization and low-temperature drying, gas-solid countercurrent contact, great enhancement of mechanical collision cutting effect, rapid pulverization and drying of particles, and can effectively avoid the defects of scaling, agglomeration and overlong drying time of coal slime or sludge in conventional low-temperature drying equipment, and the drying process is quicker, safer and more reliable. The method comprises the following steps:
feeding pre-fluidized powder with set mass into the circulating fluidized bed 8, taking secondary air of a boiler as a supply source of fluidized air, adjusting the circulating fluidized bed 8 to enter a pre-fluidized running state, and forming a high-speed particle source;
inputting the coal slime or sludge source particles processed by the extruder equipment 2 into a pre-fluidized circulating fluidized bed, merging fine powder flow reaching the cutting particle size into a secondary air pipeline, and feeding the fine powder flow into a boiler;
the particles with the granularity meeting the set requirement enter a supersonic speed mill 11 (supersonic speed airflow mill), the particles enter a crushing chamber through a blanking port after being rectified by a screen, the crushed fluidized substances are directly merged into a secondary air pipeline and are sent to a boiler, or after being filtered by a bag-type dust collector 19, the dried materials enter a powder bin for periodic storage.
The specific process comprises the following steps:
opening a secondary air inlet 9 of the boiler arranged at the throat of the circulating fluidized bed 8, feeding secondary air with designed air quantity, and then feeding pulverized coal and other particles meeting the particle size requirement, wherein the particle size of the pre-fluidized powder is 500-800 microns, and the quality is similar; is fed to the inlet of the circulating fluidized bed 8 through the pre-fluidized powder inlet 7, and establishes a stable pre-fluidized state in the circulating fluidized bed 8.
Coal slime or sludge is conveyed to an inlet of an extruder device 2 through a bucket elevator 1, an extrusion particle die 4 and a cutter 3 are arranged at the tail part of the extruder device 2, the sludge or the coal slime is processed into source particles (for example, the source particles are processed into about 5 mm) meeting the requirements of granularity and mass flow rate by the extruder device 2 and then discharged into a conveying closed pipeline 5, and the particles fall into a circulating fluidized bed 8 which is pre-fluidized through the conveying closed pipeline 5.
Under the combined action of collision, cutting and the like of high-speed particles in the circulating fluidized bed 8, source particles simultaneously perform heat and mass transfer exchange with secondary air of the boiler, the particles are rapidly expanded and broken and are circularly impacted and cut, the particles are thinned to a certain granularity and are carried to a cyclone dust collector 13 by air flow, and air powder meeting the requirement of cutting particle size flows through an outlet 12 of the cyclone dust collector and is fed into the boiler after being merged into a secondary air pipeline. In this embodiment, the circulating fluidized bed 8 is adjusted to a pre-fluidized operation state with the secondary air of the boiler at 300 to 350 ℃ as the supply source of the fluidizing air, and forms a high-speed particle source.
The large-particle-size particles automatically return to the circulating fluidized bed 8 through an automatic return pipe 14 at the lower part of the cyclone dust collector 13 under the action of gravity, and continuously participate in the collision cutting action of the high-speed particles; after an electric ash discharge valve 10 arranged at the bottom of the circulating fluidized bed 8 is started, coal slime or sludge particles with a set particle size (for example, the particle size is 500-800 micrometers) fall into a supersonic mill 11, the coal slime or the sludge particles are rectified by a conical blocking sieve plate 16, steam extracted by a steam turbine or compressed nitrogen passes through a steam turbine extracted steam or compressed nitrogen inlet 17 at the lower part of the supersonic mill 11 and is sprayed out by a nozzle, the intersection point of airflow and the falling path of the coal slime or the sludge particles are coaxially designed, and the coal slime or the sludge particles are further crushed under the action of high-speed impact, collision, friction and the like of supersonic airflow.
On one hand, the pulverized fluidized gas powder flow can be directly merged into a secondary air pipeline to be sent to a boiler. Meanwhile, after being filtered by the bag-type dust collector 19, the dry materials enter a subsequent powder bin for storage through the pneumatic ash conveying system 22 of the bag-type dust collector 19. The slag-carrying gas flow is filtered and purified and then is discharged cleanly through the exhaust pipeline 18 of the bag-type dust collector 13.
The bottom of the supersonic mill 11 is connected with a slag bin 21 through an electric slag-off valve 20, and the bottom of the slag bin 21 is provided with an electric slag-off valve 23 for equipment maintenance or equipment needing to be emptied according to special requirements. All digital signals of the system are sent to the automatic control system 24, and automatic control operation of the system is achieved.
In the embodiment, by means of the circulating fluidization crushing process, the violent transmission collision cutting composite action of high-speed particles on coal slime and sludge particles is strengthened; the contact area between the particles refined by the primary fluidized bed and the low-temperature heat source is greatly increased, and the heat transfer and mass transfer effects with the low-temperature heat source and the high-speed particles are synchronously promoted; the two are complementary, the defects of moisture absorption, scaling, agglomeration, aggregation, long drying time and the like of the conventional low-temperature drying mode are obviously overcome, and the drying process is quicker, safer and more reliable.
By means of the constructed secondary supersonic grinding process, on one hand, the contact area between powder particles and a low-temperature heat source is greatly increased again, the complete drying heat value of the particles is obviously improved, the particles can be directly stored in a warehouse as standby fuel or sprayed into a hearth as fuel powder, the particles are promoted to be fully combusted, harmful elements are converted into mineral phase slag to be thoroughly treated, secondary pollutants derived from dioxin and the like generated by low-temperature incineration are reduced, and the environment-friendly effect is obviously improved.
The second embodiment:
the embodiment provides sludge or peat drying and crushing material conveying integrated equipment, which comprises a bucket elevator 1, extruder equipment 2, a circulating fluidized bed 8, a cyclone dust collector 13, a supersonic mill 11, a bag-type dust collector 19, a slag bin 21 and the like, wherein the bucket elevator 1 is connected to the input end of the extruder equipment 2 and is used for conveying coal slime or sludge to the inlet of the extruder equipment 2; an extrusion particle die 4 is arranged at the output end of the extruder equipment 2, and a cutter 3 is arranged at the top of the extrusion particle die 4 so as to obtain particles meeting the extrusion particle size requirement.
The extrusion granule die 4 and the cutter 3 are both of the prior art, and are not described in detail here.
The top of the circulating fluidized bed 8 is communicated with the output end of the extruder equipment 2 through a conveying closed pipeline 5, and the conveying closed pipeline 5 is obliquely arranged due to the height difference between the extruder equipment 2 and the circulating fluidized bed 8. One side of the circulating fluidized bed 8 close to the top is provided with a pre-fluidized powder inlet 7 for inputting pre-vulcanized materials.
The cyclone dust collector 13 is connected with the circulating fluidized bed 8 in parallel, namely the position of the cyclone dust collector 13 close to the top is communicated with the position of the circulating fluidized bed 8 close to the top, the position of the cyclone dust collector 13 close to the bottom is communicated with the position of the circulating fluidized bed 8 close to the bottom through an automatic return pipe 14, and the automatic return pipe 14 inclines towards one side of the circulating fluidized bed 8. An outlet 12 is arranged at the top of the cyclone dust collector 13 and used for discharging primary air; an electric slag-off valve 15 is arranged at the bottom outlet of the cyclone dust collector 13.
The bottom of the circulating fluidized bed 8 is communicated with the top of the supersonic mill 11, an electric ash discharge valve 10 is arranged at the joint of the circulating fluidized bed and the supersonic mill, and the joint is connected with a secondary air inlet 9 of a boiler; one side of the circulating fluidized bed 8 is connected with a bag-type dust remover 19 through a pipeline, and the bottom of the supersonic mill 11 is connected with a slag bin 21.
Furthermore, a conical blocking sieve plate 16 is fixed at the middle position in the supersonic mill 11, and the conical blocking sieve plate 16 is provided with a downward inclined surface. The conical blocking sieve plate 16 of the embodiment adopts a conical sieve plate with the diameter-height ratio of 10.
The supersonic mill 11 is connected with a turbine extraction or compressed nitrogen inlet 17, and the turbine extraction or compressed nitrogen inlet 17 is positioned below the conical blocking sieve plate 16. An electric slag tap 20 is arranged at the joint of the slag bin 21 and the supersonic mill 11, and an electric slag tap 23 is arranged at the outlet of the bottom of the slag bin 21.
The top of the bag-type dust collector 19 is provided with an exhaust pipeline 18, and the bottom is provided with a pneumatic ash conveying system 22. The present embodiment also includes an automatic control system 24 for controlling all digital signals in the equipment.
Each electric slag tap of the embodiment adopts a jaw-type electric slag tap.
The circulating fluidized bed 8 and the jet mill in the embodiment have the advantages of less additional matched equipment, small occupied area, compact process layout and civil engineering cost saving; the tail gas is clean, the flow is small, the drying cost is low, and the dual effects of energy conservation and environmental protection are achieved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A sludge or peat drying and crushing material conveying integrated process is characterized in that a primary circulating fluidized bed is based on collision crushing and low-temperature drying, and secondary airflow is superposed to pulverize and combine with low-temperature drying; the method comprises the following steps:
feeding pre-fluidized powder with set mass into the circulating fluidized bed, taking secondary air of a boiler as a supply source of fluidized air, adjusting the circulating fluidized bed to enter a pre-fluidized running state, and forming a high-speed particle source;
inputting the coal slime or sludge source particles processed by the extruder equipment into a pre-fluidized circulating fluidized bed, merging fine powder flow reaching the cutting particle size into a secondary air pipeline, and feeding the fine powder flow into a boiler;
the particles with the granularity meeting the set requirement enter a supersonic mill, are rectified by a screen and then enter a crushing chamber through a blanking port, and crushed fluidized substances are directly merged into a secondary air pipeline and are conveyed to a boiler, or after being filtered by a bag-type dust collector, dried materials enter a powder bin for periodic storage.
2. The integrated process for drying and crushing sludge or peat and conveying materials according to claim 1, wherein a secondary air inlet of a boiler at the throat of the circulating fluidized bed is opened first, secondary air with designed air volume is fed, and then pre-fluidized powder meeting the particle size requirement is fed to the inlet of the circulating fluidized bed.
3. The integrated process for drying and crushing sludge or peat and conveying the materials according to claim 1 or 2, wherein the particle size of the pre-fluidized powder is 500-800 μm and the temperature of the secondary air of the boiler is 300-350 ℃.
4. The integrated process for drying and crushing the sludge or peat and conveying the materials as claimed in claim 1, wherein the coal slime or sludge is conveyed to the extruder device through a bucket elevator and processed into source particles meeting the requirements of particle size and mass flow rate through the extruder device; the source particles enter the circulating fluidized bed through a conveying closed pipeline.
5. The integrated process for drying and crushing sludge or peat and conveying materials according to claim 1 or 4, wherein source particles are subjected to heat and mass transfer exchange with secondary air of a boiler under the combined action of collision and cutting of high-speed particles in a circulating fluidized bed, the particles are rapidly expanded, broken, circularly impacted and cut, refined to a set particle size, carried by an air flow to a cyclone dust collector, merged into a secondary air pipeline, and then conveyed into the boiler.
6. The integrated process for drying and crushing sludge or peat and conveying the materials as claimed in claim 5, wherein the particles not meeting the particle size requirement are automatically returned to the circulating fluidized bed by the gravity through the automatic return pipe of the cyclone dust collector, and continue to participate in the collision cutting action of the high-speed particles.
7. The integrated process for drying and crushing sludge or peat and conveying materials according to claim 1, wherein steam extraction or compressed nitrogen from a steam turbine is performed through a steam turbine of a supersonic mill, and then the steam or compressed nitrogen is sprayed out from a nozzle, wherein the intersection point of the air flow and the falling path of the coal slime or sludge particles are designed coaxially, and the coal slime or sludge particles are further crushed under the action of high-speed impact, collision and friction of the supersonic air flow.
8. The integrated equipment for drying and conveying the crushed materials of the sludge or peat is characterized by comprising a circulating fluidized bed, wherein one side of the circulating fluidized bed is connected with a cyclone dust collector in parallel; the circulating fluidized bed is provided with a pre-fluidized powder inlet, the top of the circulating fluidized bed is connected with extruder equipment through a conveying closed pipeline, the bottom of the circulating fluidized bed is connected with a supersonic mill, and a boiler secondary air inlet is arranged at the joint of the supersonic mill and the circulating fluidized bed; the input end of the extruder equipment is connected with the bucket elevator, and one side of the supersonic mill is communicated with the bag-type dust remover.
9. The integrated equipment for drying and crushing sludge or peat and conveying materials according to claim 8, characterized in that an electric ash discharge valve is installed at the junction of the supersonic mill and the circulating fluidized bed;
the supersonic mill is internally provided with a conical blocking sieve plate, and the lower side of the conical blocking sieve plate is provided with a steam turbine steam extraction or compressed nitrogen inlet.
10. The integrated equipment for drying and crushing the sludge or peat and conveying the materials according to claim 8, wherein the bottom of the supersonic mill is connected with a slag bin, and an electric slag tapping valve is installed at an outlet of the slag bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211084179.4A CN115451421A (en) | 2022-09-06 | 2022-09-06 | Integrated process and equipment for conveying sludge or peat dried and crushed materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211084179.4A CN115451421A (en) | 2022-09-06 | 2022-09-06 | Integrated process and equipment for conveying sludge or peat dried and crushed materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115451421A true CN115451421A (en) | 2022-12-09 |
Family
ID=84303794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211084179.4A Pending CN115451421A (en) | 2022-09-06 | 2022-09-06 | Integrated process and equipment for conveying sludge or peat dried and crushed materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115451421A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116590024A (en) * | 2023-07-17 | 2023-08-15 | 山东菲特环保设备有限公司 | Synergistic treatment method for gasified slag, sludge and low-value coal slime |
| RU2813589C1 (en) * | 2023-05-26 | 2024-02-13 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный горный университет" | Mobile installation for recycling mixture of water treatment sludge and peat |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2610111A1 (en) * | 2006-11-10 | 2008-05-10 | Rwe Power Aktiengesellschaft | Method of and arrangement for co-combustion of biomasses and/or organic wastes as secondary fuel in a coal dust firing system |
| CN101713543A (en) * | 2009-02-24 | 2010-05-26 | 刘沪滨 | Sludge incinerator with no auxiliary fuel |
| CN104214758A (en) * | 2014-09-30 | 2014-12-17 | 上海援梦电力能源科技咨询中心 | Fan mill and steel ball mill-pulverized coal and sludge mixed burning green power generation system |
| CN104876416A (en) * | 2015-05-14 | 2015-09-02 | 何伟才 | Sludge drying treatment system and method |
| CN111649334A (en) * | 2020-06-29 | 2020-09-11 | 华能国际电力股份有限公司 | Novel sludge drying and incinerating system and method |
| CN212408675U (en) * | 2020-06-29 | 2021-01-26 | 华能国际电力股份有限公司 | Novel sludge drying and incinerating system |
-
2022
- 2022-09-06 CN CN202211084179.4A patent/CN115451421A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2610111A1 (en) * | 2006-11-10 | 2008-05-10 | Rwe Power Aktiengesellschaft | Method of and arrangement for co-combustion of biomasses and/or organic wastes as secondary fuel in a coal dust firing system |
| CN101713543A (en) * | 2009-02-24 | 2010-05-26 | 刘沪滨 | Sludge incinerator with no auxiliary fuel |
| CN104214758A (en) * | 2014-09-30 | 2014-12-17 | 上海援梦电力能源科技咨询中心 | Fan mill and steel ball mill-pulverized coal and sludge mixed burning green power generation system |
| CN104876416A (en) * | 2015-05-14 | 2015-09-02 | 何伟才 | Sludge drying treatment system and method |
| CN111649334A (en) * | 2020-06-29 | 2020-09-11 | 华能国际电力股份有限公司 | Novel sludge drying and incinerating system and method |
| CN212408675U (en) * | 2020-06-29 | 2021-01-26 | 华能国际电力股份有限公司 | Novel sludge drying and incinerating system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2813589C1 (en) * | 2023-05-26 | 2024-02-13 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный горный университет" | Mobile installation for recycling mixture of water treatment sludge and peat |
| CN116590024A (en) * | 2023-07-17 | 2023-08-15 | 山东菲特环保设备有限公司 | Synergistic treatment method for gasified slag, sludge and low-value coal slime |
| CN116590024B (en) * | 2023-07-17 | 2023-12-08 | 杭州青绿能源有限公司 | Synergistic treatment method for gasified slag, sludge and low-value coal slime |
| RU2825128C1 (en) * | 2024-03-20 | 2024-08-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный горный университет" | Mobile unit for extraction from bottom of reservoir and dehydration of sapropel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2419742C2 (en) | Complex procedure for conversion of all ashes produced with steam boiler into volatile ashes with reduced contents of not-combusted substance and system for processing steam boiler produced ashes by such procedure | |
| WO2022188369A1 (en) | Waste wind turbine blade pyrolysis recovery system and working method therefor | |
| CN101870897B (en) | Process for carrying out strengthening circulation, stage grinding and quality improvement on lignite by utilizing superheated steam and system thereof | |
| CN202725512U (en) | Full-grain high-efficiency dry coal preparation system for power coal separation | |
| JP7532537B2 (en) | Apparatus and method for granulating blast furnace slag and recycling waste heat | |
| CN103447137B (en) | One is coal dust preparation system and method safely and efficiently | |
| CN115451421A (en) | Integrated process and equipment for conveying sludge or peat dried and crushed materials | |
| CN111649334A (en) | Novel sludge drying and incinerating system and method | |
| CN101983942B (en) | Drying and quality improvement apparatus for slime and sludge and technology thereof | |
| CN212408675U (en) | Novel sludge drying and incinerating system | |
| KR20090032602A (en) | The method that drying sludge of the type of ventury ejector using difference between air current and atmospheric pressure | |
| CN107504492B (en) | Industrial sludge, waste emulsion residue and metallurgical ash combined treatment system and power generation process thereof | |
| CN203928676U (en) | Roller dryer and comprise its living beings wood pellet fuel production equipment | |
| CN210496790U (en) | Online pulverized coal grading system | |
| CN109022006B (en) | Production system and process of powdery coke/semi coke for grading utilization of coal powder particle size | |
| CN201873599U (en) | Drying and upgrading device for coal slim and sludge | |
| CN202037125U (en) | Online pulverized coal refining separation device | |
| CN212284042U (en) | Quick entrained flow sludge drying burns simple and easy device | |
| CN110567261B (en) | Gasification ash drying device and method of four-nozzle water gas type entrained flow bed | |
| CN203540665U (en) | Safe efficient coal powder preparation system | |
| CN111322866A (en) | Gasification and calcination device for low-calorific-value materials | |
| CN208058854U (en) | A kind of broken feed system of solid waste incinerator | |
| CN116067163B (en) | System and process for drying chlorine-containing powder chlorine-removing filter residues through low-temperature waste gas in kiln head | |
| JP2013174419A (en) | Fluidized bed drying apparatus | |
| CN216224800U (en) | Pre-separation combined type medium-speed coal powder separator |
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 |