CN114877623A - Manganese sulfate drying device based on hot-blast stove - Google Patents
Manganese sulfate drying device based on hot-blast stove Download PDFInfo
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- CN114877623A CN114877623A CN202210638117.7A CN202210638117A CN114877623A CN 114877623 A CN114877623 A CN 114877623A CN 202210638117 A CN202210638117 A CN 202210638117A CN 114877623 A CN114877623 A CN 114877623A
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- manganese sulfate
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- 238000001035 drying Methods 0.000 title claims abstract description 106
- 229940099596 manganese sulfate Drugs 0.000 title claims abstract description 48
- 235000007079 manganese sulphate Nutrition 0.000 title claims abstract description 48
- 239000011702 manganese sulphate Substances 0.000 title claims abstract description 48
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 title claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 89
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000000428 dust Substances 0.000 claims abstract description 51
- 239000007789 gas Substances 0.000 claims abstract description 51
- 239000003345 natural gas Substances 0.000 claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 239000010410 layer Substances 0.000 claims description 10
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- 241001330002 Bambuseae Species 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
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- 229930002875 chlorophyll Natural products 0.000 description 1
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- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 description 1
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
- F26B1/005—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids by means of disintegrating, e.g. crushing, shredding, milling the materials to be dried
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/08—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers
- B02C18/12—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers with drive arranged below container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/18—Knives; Mountings thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
- F26B17/101—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis
- F26B17/105—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis the shaft or duct, e.g. its axis, being other than straight, i.e. curved, zig-zag, closed-loop, spiral
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a manganese sulfate drying device based on a hot blast stove, which comprises a solid-liquid centrifuge, a screw conveyor connection, a blower, a natural gas direct combustion type hot blast stove, a drying pipe and a pulse dust collector, wherein the solid-liquid centrifuge is connected with the screw conveyor connection; the natural gas direct-fired hot blast stove is provided with a plurality of circles of air exchange holes and further comprises an airflow crusher, an air delivery chute, an iron remover, a manganese sulfate bin, a draught fan, a tail gas heat exchanger and a steam heat exchanger. The manganese sulfate drying device realizes the full mixing of cold air and hot air, and improves the drying quality; the airflow crusher is arranged to crush the blocky materials firstly and then dry and convey the blocky materials, so that the utilization rate of the materials is improved, and the waste of the materials is reduced; the filter bag is effectively prevented from being damaged by manganese sulfate heavy materials, and the drying tail gas mixed in the materials can be replaced, so that the quality of the materials is improved; in addition, the dedusting tail gas of the pulse deduster is subjected to heat recycling through the tail gas heat exchanger and the steam heat exchanger, and the gas is recycled, so that the purposes of energy conservation and emission reduction are achieved.
Description
Technical Field
The invention relates to a drying device, in particular to a manganese sulfate drying device based on a hot blast stove.
Background
Manganese sulfate is an important chemical product, and can be widely applied to industrial and agricultural production. Manganese sulfate is an important microelement fertilizer in agriculture, is a catalyst for synthesizing chlorophyll by plants, and can ensure that various economic crops grow well and increase the yield by spraying the manganese sulfate. The manganese acid is added into animal feed, and has fattening effect. Manganese sulfate is also a raw material and analytical reagent for preparing other manganese salts. Manganese sulfate is also used in the industrial production of electrolytic manganese, dye, paper making, ceramics and the like. Manganese sulfate is used in the inorganic industry for electrolytic manganese production and preparation of various manganese salts, and in the coating industry for production of driers, linseed oil manganese sulfate and the like. The manganese sulfate needs to be subjected to multiple times of evaporative crystallization and solid-liquid separation in production, so that the last step of the manganese sulfate is drying.
At present, the manganese sulfate drying device based on the hot blast stove is structurally shown in fig. 7 and comprises a plurality of solid-liquid centrifuges, wherein the solid-liquid centrifuges are connected with an auger conveyor, the auger conveyor is connected with a material collector through a pipeline, an air inlet of the material collector is connected with an air blower, the air blower is connected with a natural gas direct combustion type hot blast stove, the natural gas direct combustion type hot blast stove comprises an outer barrel and an inner barrel, the inner barrel is wrapped in the outer barrel, two ends of the inner barrel extend out of the outer barrel, the front end of the outer barrel is connected with the inner barrel through a fixed barrel, the rear end of the outer barrel is connected with the inner barrel through a ventilation barrel, an air inlet is formed in the position, close to the fixed barrel, of the outer barrel, a heat preservation layer is wrapped on the outer wall of the outer barrel, a plurality of supporting supports are arranged at the lower end of the outer barrel, and a natural gas burner penetrating through the fixed barrel is arranged in the center of the front end of the inner barrel, the rear end of the inner cylinder body is provided with an air outlet communicated with the ventilation cylinder; the air outlet of collector passes through the drying tube and is connected with the pulse dust remover, the pulse dust remover includes the dust removal box and locates the hopper of dust removal box below, the air outlet on the dust removal box is connected with the blast pipe, and the drying device of structure has following defect like this: firstly, cold air of the natural gas direct-fired hot blast stove is mixed and discharged from an outer cylinder body through an air cylinder and hot air at an air outlet, only wall-type heat exchange is carried out between the cold air and the hot air without mixing, so that the temperature of the hot air at the air outlet is uneven, on one hand, the drying quality of manganese sulfate is influenced, on the other hand, the heat exchange efficiency is low, so that the temperature of the hot air of an inner cylinder body is high, and the inner cylinder body is generally made of common cast iron, so that the cylinder body of the inner cylinder body is collapsed or even burnt through, the normal operation of a manganese sulfate drying device is influenced, and the quality of a manganese sulfate product is influenced by the fact that the hot air is mixed with iron rust; secondly, a large amount of large and heavy blocky materials are mixed in the wet manganese sulfate materials and cannot be dried and conveyed by means of wind power, and the material collector is not provided with a crushing device to crush the materials, so that the large and heavy blocky materials fall and are deposited at the bottom end of the material collector, so that on one hand, the material utilization rate is low, the waste is large, and on the other hand, a large amount of manpower is required to clean deposits; thirdly, a hopper of the pulse dust collector is not provided with a degassing and cooling device, and the materials falling in the hopper cannot be prevented from being mixed with drying tail gas, the temperature of the materials is relatively high, and the materials directly enter a storage bin from the hopper to be stored, so that the product quality is influenced; fourthly, after the pulse dust collector separates and removes dust from solid and gas of the materials, the gas is directly discharged through the exhaust pipe, the dust removal tail gas reaches more than one hundred degrees, the dust removal tail gas is discharged without utilizing the heat of the dust removal tail gas, and the heat utilization of the drying device is low; in addition, the drying pipe is the straight tube that the diameter is the same, and the material is carried at the uniform velocity in the drying pipe, and the time is fast carried slowly when not setting up the messenger material, leads to the drying efficiency of material in the drying pipe poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a manganese sulfate drying device based on a hot-blast stove, wherein a casting protective layer is additionally arranged at the front end of an inner barrel of the natural gas hot-blast stove, and a plurality of circles of air exchange holes are additionally arranged at the rear end of the inner barrel, so that cold air and hot air are fully mixed, the temperature of the dried hot air is uniform, and the drying quality is improved; the airflow crusher is arranged between the air blower and the drying pipe, so that the blocky materials are crushed firstly and then dried and conveyed, the utilization rate of the materials is improved, the material waste is reduced, and the working strength of manually cleaning sediments is also reduced; the pulse dust collector adopts hopper air inlet, and the air delivery chute is arranged below the hopper, so that the damage of manganese sulfate heavy materials to a filter bag is effectively avoided, the drying tail gas mixed in the materials can be replaced, the quality of the materials is improved, and on the other hand, the materials can be conveyed and cooled at the same time, so that the materials can be conveniently stored in a storage bin; in addition, the heat of the dedusting tail gas of the pulse deduster is recycled through the tail gas heat exchanger and the steam heat exchanger, the heat of the dedusting tail gas is fully utilized, the heat energy required by steam heating is not required to be consumed, the gas is recycled, and the purposes of energy conservation and emission reduction are achieved.
In order to achieve the purpose, the invention adopts the technical scheme that:
manganese sulfate drying device based on hot-blast furnace is the same with current structure: the device comprises a plurality of solid-liquid centrifuges, the solid-liquid centrifuges are connected with a packing auger conveyor, the device also comprises an air blower, the air inlet of the air blower is connected with a natural gas direct combustion type hot blast stove through a pipeline, the natural gas direct combustion type hot blast stove comprises an outer barrel and an inner barrel covered by the outer barrel, the two ends of the inner barrel extend out of the outer barrel, the front end of the outer barrel is connected with the inner barrel through a fixed barrel, the outer barrel is close to the fixed barrel and is provided with an air inlet, the outer wall of the outer barrel is covered by a heat insulation layer, the lower end of the outer barrel is provided with a plurality of supporting supports, the center of the front end of the inner barrel is provided with a natural gas burner penetrating through the fixed barrel, the rear end of the inner barrel is provided with an air outlet and further comprises a drying pipe, the drying pipe is connected with a pulse dust collector, the pulse dust collector comprises a dust collection box body and a hopper arranged below the dust collection box body, an air outlet on the dust removal box body is connected with an exhaust pipe; the difference is that: the rear end of an outer cylinder of the natural gas direct-fired hot blast stove is connected with an inner cylinder through a sealed heat-preservation cylinder, the inner walls of the front end of the inner cylinder and the two sides of a natural gas burner are provided with casting protective layers, the cylinder wall of the rear end of the inner cylinder is provided with a plurality of circles of air exchange holes along the circumferential direction, and each circle of air exchange holes are uniformly formed in the cylinder wall of the inner cylinder; the air flow crusher is arranged between the blower and the drying pipe and comprises a host base, a crushing chamber and a crushing device, wherein the crushing chamber and the crushing device are arranged on the host base, the crushing chamber comprises a crushing barrel body arranged on the host base and a feeding and discharging conical opening arranged above the crushing barrel body and communicated with the crushing barrel body, the crushing barrel body is in a cylindrical hollow shape, an air inlet volute body covering the crushing barrel body is arranged on the outer side of the crushing barrel body and is communicated with the crushing barrel body in an air mode, a cleaning opening communicated with the inner part of the crushing barrel body is formed in the bottom end of the crushing barrel body, the crushing device comprises a crushing motor fixed on the host base, the crushing motor is connected with a rotating shaft vertically arranged on the host base through a belt, the front end of the rotating shaft extends into the crushing barrel body after extending out of the host base, and a plurality of crushing cutter groups positioned in the crushing barrel body are arranged on the rotating shaft from top to bottom in parallel, each group of crushing cutter groups comprises two crushing cutters arranged on the same horizontal plane of a rotating shaft, a rotary inverted cone is sleeved on the rotating shaft and positioned below the fine crushing cutter groups, and the rotary inverted cone is used for guiding and pushing the falling large materials to a cleaning opening; the device comprises a drying pipe, a hopper, an air supply chute, a chute air inlet, a chute air feeder, a dehumidifier, a dust removal air tank, a dust removal air box, a drying pipe, a dust removal air box and a dust removal air box, wherein a discharge port of the drying pipe is connected with an air inlet arranged on the side end of the hopper of the pulse dust remover, the bottom end of the hopper is connected with the air supply chute which can remove air and cool and is closed, the bottom end of the air supply chute is arranged obliquely downwards, a falling pore plate and filter cloth are arranged at the bottom end of the air supply chute from top to bottom, an observation window is further formed in the air supply chute, an oblique chute air inlet is formed in the high end of the air supply chute; the chute material outlet is connected with a vibrating screen through a pipeline, and the vibrating screen is connected with a manganese sulfate bin through a blanking conveying component with an iron remover; the blast pipe is connected with the draught fan, the draught fan passes through the pipeline and is connected with the tail gas heat exchanger, the last tail gas delivery pipe of having seted up of tail gas heat exchanger, the tail gas heat exchanger passes through the pipeline and is connected with the clean air case, the tail gas heat exchanger passes through the pipeline and is connected with steam heat exchanger, steam heat exchanger passes through the pipeline and is connected with natural gas direct combustion formula hot-blast furnace, the upper end of steam heat exchanger one side is equipped with that steam advances the pipe, the lower extreme is equipped with the steam exit tube.
As a preferred technical scheme, in order to enable the materials to be conveyed in the drying pipe rapidly and slowly and further prolong the time of the materials in the drying pipe, to realize the full contact between hot air and the materials and to greatly improve the drying effect, the drying pipe comprises a cylindrical drying straight pipe and a polygonal drying wide pipe, and the drying straight pipe and the drying wide pipe are arranged in a staggered mode.
As preferred technical scheme, preheat through the next door earlier between in order to realize cold wind and the hot-blast, rethread exchange wind hole intensive mixing, the section of thick bamboo wall temperature of barrel in being favorable to reducing on the one hand, effectively prevent high temperature deformation damage even, on the other hand further guarantees that the hot-blast temperature of air outlet is even, the section of thick bamboo wall of interior barrel rear end has seted up 6 circles along its circumferencial direction and has exchanged the wind hole, and 17 exchange wind holes have all been seted up to every circle, and the diameter of every exchange wind hole is 80mm, 160mm apart from between every circle exchange wind hole.
As an optimal technical scheme, in order to continuously crush missed large materials and materials crushed by the crushing cutter set 9, the materials are dried by hot air flow and blown out, all the blocked materials entering the crushing barrel are crushed, the drying and crushing rate is greatly improved, the utilization rate of the materials is improved, and therefore the improvement of the yield of manganese sulfate is facilitated.
As the preferred technical scheme, in order to avoid broken material and in it gets into the rotation axis to mix with the dust granule, cause the rotation axis to break down or even damage, guarantee the rotation axis normal rotation, rotation axis and crushing knife tackle, thin crushing knife tackle junction all adopt airtight.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the manganese sulfate drying device, the pouring protective layer is additionally arranged at the front end of the inner barrel of the natural gas hot blast stove, and the plurality of circles of air exchange holes are additionally arranged at the rear end, so that cold air and hot air are fully mixed, the temperature of the dried hot air is uniform, and the drying quality is improved; the airflow crusher is arranged between the air blower and the drying pipe, so that the blocky materials are crushed firstly and then dried and conveyed, the utilization rate of the materials is improved, the material waste is reduced, and the working strength of manually cleaning sediments is also reduced; the pulse dust collector adopts hopper air inlet, and the air delivery chute is arranged below the hopper, so that the damage of manganese sulfate heavy materials to a filter bag is effectively avoided, the drying tail gas mixed in the materials can be replaced, the quality of the materials is improved, and on the other hand, the materials can be conveyed and cooled at the same time, so that the materials can be conveniently stored in a storage bin; in addition, the heat of the dedusting tail gas of the pulse deduster is recycled through the tail gas heat exchanger and the steam heat exchanger, the heat of the dedusting tail gas is fully utilized, the heat energy required by steam heating is not required to be consumed, the gas is recycled, and the purposes of energy conservation and emission reduction are achieved.
2. The drying pipe is formed by the staggered arrangement of the drying straight pipe and the drying wide pipe, so that the material is conveyed quickly and slowly in the drying pipe, the time of the material in the drying pipe is further prolonged, the full contact between hot air and the material is realized, and the drying effect is greatly improved.
3. The structure size of the air exchange hole of the natural gas direct-fired hot blast stove is scientific and reasonable, cold air and hot air are preheated through the dividing wall, and then are fully and uniformly mixed through the air exchange hole, so that on one hand, the temperature of the cylinder wall of the inner cylinder body is favorably reduced, high-temperature deformation or even damage is effectively prevented, and on the other hand, the hot air temperature of the air outlet is further ensured to be uniform.
4. The airflow crusher is also provided with a fine crushing cutter set, the omitted large materials and the materials crushed by the crushing cutter set are continuously crushed, dried by hot airflow and blown out, all the agglomerated materials entering the crushing barrel are crushed, the drying and crushing rate is greatly improved, the utilization rate of the materials is improved, and the yield of manganese sulfate is favorably improved.
5. The rotating shaft of the airflow crusher adopts air seal, so that broken materials and dust particles mixed with the broken materials are prevented from entering the rotating shaft, the rotating shaft is prevented from being broken or even damaged, and the normal rotation of the rotating shaft is ensured
Drawings
The invention is described in further detail below with reference to the figures and specific examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a natural gas direct-fired stove;
FIG. 3 is a schematic view of the structure of the jet mill;
FIG. 4 is a schematic structural view of a pulse dust collector;
FIG. 5 is a schematic view of a drying duct;
FIG. 6 is a schematic diagram of a drying process of the drying apparatus;
FIG. 7 is a schematic structural diagram of a conventional manganese sulfate drying device;
reference numerals: 1. the device comprises a solid-liquid centrifuge, 2 parts of a blanking conveying component, 3 parts of a packing auger conveyor, 4 parts of a blower, 5 parts of a natural gas direct combustion type hot blast stove, 5-1 parts of an outer cylinder body, 5-2 parts of an inner cylinder body, 5-3 parts of a fixed cylinder, 5-4 parts of an air inlet, 5-5 parts of a heat insulation layer, 5-6 parts of a support base, 5-7 parts of a natural gas burner, 5-8 parts of an air outlet, 5-9 parts of a sealed heat insulation cylinder, 5-10 parts of a pouring protective layer, 5-11 parts of an air exchange hole, 6 parts of a drying pipe, 6-1 parts of a drying straight pipe, 6-2 parts of a drying wide pipe, 7 parts of a pulse dust remover, 7-1 parts of a dust removing box body, 7-2 parts of a hopper, 7-3 parts of an air outlet, 7-4 parts of an air conveying chute, 7-4 parts of a falling hole plate, 7-4-2 parts of a falling hole plate, 7-2 parts of a natural gas direct combustion type hot blast stove, 5-1 parts of a sealing heat insulation layer, 5 parts of a sealing layer, and a sealing layer, 5-10 parts of a sealing layer, and a sealing layer, wherein the air outlet are formed by the outer cylinder, and the outer cylinder is arranged in the outer cylinder, and the outer cylinder are arranged in the outer cylinder, and the inner cylinder are arranged in the outer cylinder, and the outer cylinder, 7-4-3 parts of filter cloth, 7-4-4 parts of observation window, 7-4-4 parts of chute air inlet, 7-4-5 parts of chute material outlet, 7-4-6 parts of evacuation port, 7-5 parts of chute blower, 7-6 parts of dehumidifier, 7-7 parts of dedusting air box, 7-8 parts of air inlet, 8 parts of exhaust pipe, 9 parts of airflow crusher, 9-1 parts of host base, 9-2 parts of crushing cylinder, 9-3 parts of feeding and discharging cone port, 9-4 parts of feeding and discharging cone port, 9-5 parts of air inlet volute, 9-6 parts of cleaning port, 9-7 parts of crushing motor, belt, 9-8 parts of rotating shaft, 9-9 parts of crushing cutter set, 9-10 parts of rotating inverted cone, 9-11 parts of fine crushing cutter set, 9-12 parts of air seal, 10 parts of vibrating screen, 11. the device comprises an iron remover, 12, a manganese sulfate bin, 13, an induced draft fan, 14, a tail gas heat exchanger, 14-1, a tail gas discharge pipe, 15, a clean air box, 16, a steam heat exchanger, 16-1, a steam inlet pipe, 16-2 and a steam outlet pipe.
Detailed Description
As shown in fig. 1, a specific embodiment of the present invention is proposed, and a manganese sulfate drying device based on a hot-blast stove is the same as the existing structure: the device comprises a plurality of solid-liquid centrifuges 1, 2 solid-liquid centrifuges 1 are arranged in the embodiment, the solid-liquid centrifuges 1 are connected with an auger conveyor 3, then the solid-liquid centrifuges 1 convey solids after solid-liquid separation through the auger conveyor 3, the device also comprises an air blower 4, the air blower 4 is connected with a natural gas direct combustion type hot blast stove 5 through a pipeline, the natural gas direct combustion type hot blast stove 5 comprises an outer barrel 5-1 and an inner barrel 5-2 covered by the outer barrel 5-1, two ends of the inner barrel 5-2 extend out of the outer barrel 5-1, the length of the inner barrel 5-2 is longer than that of the outer barrel 5-1, the inner diameter of the outer barrel 5-1 is 1400mm, the length of the outer barrel 5-1 is 2697mm, the inner diameter of the inner barrel 5-2 is 900mm, the length of the inner barrel is 3000mm, and the front end of the outer barrel 5-1 is connected with the inner barrel 5-2 through a fixed barrel 5-3 An air inlet 5-4 is formed in the position, close to the fixed cylinder 5-3, of the outer cylinder 5-1, the outer wall of the outer cylinder 5-1 is coated with a heat insulation layer 5-5, the lower end of the outer cylinder 5-1 is provided with a plurality of supporting supports 5-6, a natural gas burner 5-7 penetrating through the fixed cylinder 5-3 is arranged in the center of the front end of the inner cylinder 5-2, the rear end of the inner cylinder 5-2 is provided with an air outlet 5-8, the pulse dust collector 7 further comprises a drying pipe 6, the drying pipe 6 is connected with the pulse dust collector 7, the pulse dust collector 7 comprises a dust collection box body 7-1 and a hopper 7-2 arranged below the dust collection box body 7-1, and the air outlet 7-3 in the dust collection box body 7-1 is connected with an exhaust pipe 8; the difference is that: the rear end of an outer cylinder 5-1 of the natural gas direct-fired hot blast stove 5 is connected with an inner cylinder 5-2 through a sealed heat preservation cylinder 5-9, the front end of the inner cylinder 5-2 and the inner walls of two sides of a natural gas burner 5-7 are provided with pouring protective layers 5-10, the pouring protective layers 5-10 are made of refractory concrete in the embodiment, the cylinder wall of the rear end of the inner cylinder 5-2 is provided with a plurality of circles of air exchange holes 5-11 along the circumferential direction, the outer cylinder 5-1 is in gas communication with the inner cylinder 5-2 through the air exchange holes 5-11, each circle of air exchange holes 5-11 are uniformly arranged on the cylinder wall of the inner cylinder 5-2, as shown in figure 2, and in order to avoid burning and collapsing of the inner cylinder 5-2, the inner cylinder 5-2 is arranged in the embodiment and is made of 310s material, The outer cylinder 5-1 is made of 304 steel; an airflow crusher 9 is arranged between the blower 4 and the drying pipe 6, the airflow crusher 9 comprises a host base 9-1, a crushing chamber and a crushing device, the crushing chamber and the crushing device are arranged on the host base 9-1, the host base 9-1 is arranged in a square shape in the embodiment, the crushing chamber comprises a crushing cylinder 9-2 arranged on the host base 9-1 and a feeding and discharging conical opening 9-3 which is arranged above the crushing cylinder 9-2 and communicated with the crushing cylinder 9-2, the crushing cylinder 9-2 is cylindrical and hollow, an air inlet volute 9-4 for coating the crushing cylinder 9-2 is arranged on the outer side of the crushing cylinder 9-2, the air inlet volute 9-4 is communicated with the crushing cylinder 9-2, hot air enters the crushing cylinder 9-2 through the air inlet volute 9-4 to form vortex upward-spinning airflow, and the vortex upward-spinning airflow dries materials on one hand, meanwhile, materials are spirally conveyed out of a feeding and discharging conical opening 9-3, the diameter of the upper end of the feeding and discharging conical opening 9-3 is 800mm, the diameter of a crushing cylinder 9-2 is 1000mm, in order to facilitate hot air to enter the air inlet volute 9-4, an air inlet of the air inlet volute 9-4 is also conical, a cleaning opening 9-5 communicated with the inside of the crushing cylinder 9-2 is formed in the bottom end of the crushing cylinder 9-2, the crushing device comprises a crushing motor 9-6 fixed on a main machine base 9-1, the crushing motor 9-6 is connected with a rotating shaft 9-8 vertically arranged on the main machine base 9-1 through a belt 9-7, the front end of the rotating shaft 9-8 extends out of the main machine base 9-1 and then extends into the crushing cylinder 9-2, the rotary shaft 9-8 is provided with a plurality of groups of crushing cutter groups 9-9 which are positioned in the crushing cylinder 9-2 in parallel from top to bottom, each group of crushing cutter groups 9-9 comprises two crushing cutters which are arranged on the same horizontal plane of the rotary shaft 9-8, a rotary inverted cone 9-10 is sleeved on the rotary shaft 9-8 and positioned below the fine crushing cutter group 9-9, and the rotary inverted cone 9-10 is used for guiding and pushing the dropped large materials to a cleaning opening 9-5, as shown in fig. 3; the discharge port of the drying pipe 6 is connected with an air inlet 7-8 arranged at the side end of a hopper 7-2 of a pulse dust collector 7, hot gas mixed with manganese sulfate materials in the drying pipe 6 directly enters the hopper 7-2 from the air inlet 7-8, the bottom end of the hopper 7-2 is connected with an air supply chute 7-4 capable of degassing, cooling and sealing, the bottom end of the air supply chute 7-4 is arranged obliquely downwards, in consideration of poor flowability of the manganese sulfate solid materials, in order to discharge the materials in the air supply chute 3 and remove large particle impurities mixed in the materials, the bottom end of the air supply chute 7-4 is provided with a falling pore plate 7-4-1 and filter cloth 7-4-2 from top to bottom, and the air supply chute 7-4 is also provided with an observation window 7-4-3, the inclined high end of the air supply chute 7-4 is provided with a chute air inlet 7-4-4, the chute air inlet 7-4-4 is connected with a chute air feeder 7-5 through a pipeline, the chute air feeder 7-5 is connected with a dehumidifier 7-6 through a pipeline, the dehumidifier 7-6 is connected with a dust removal air tank 7-7 through a pipeline, so that the air entering the air supply chute 7-4 is dry and clean air, on one hand, the dried tail gas in the air supply chute 7-4 is replaced, on the other hand, the dry and clean air carries and cools the materials in the air supply chute 7-4, the inclined bottom end of the air supply chute 7-4 is provided with a chute material outlet 7-4-5, as shown in figure 4, in order to facilitate emptying of all the materials in the air supply chute 7-4, in the embodiment, the bottom end of the air delivery chute 7-4 is also provided with an emptying port 7-4-6; the chute material outlet 7-4-5 is connected with a vibrating screen 10 through a pipeline, and the vibrating screen 10 is connected with a manganese sulfate bin 12 through a blanking conveying component 2 with an iron remover 11; the exhaust pipe 8 is connected with the induced draft fan 13, the induced draft fan 12 is connected with the tail gas heat exchanger 14 through a pipeline, the tail gas heat exchanger 14 is provided with a tail gas exhaust pipe 14-1, the tail gas heat exchanger 14 is connected with the clean air box 15 through a pipeline, the air in the clean air box 15 is subjected to dust removal and impurity removal, the tail gas heat exchanger 14 is connected with the steam heat exchanger 16 through a pipeline, the steam heat exchanger 16 is connected with the natural gas direct combustion type hot air furnace 8 through a pipeline, cold air discharged from the steam heat exchanger 16 serves as a cold source of the natural gas direct combustion type hot air furnace 5, the upper end of one side of the steam heat exchanger 16 is provided with a steam inlet pipe 16-1, the lower end of one side of the steam heat exchanger 16 is provided with a steam outlet pipe 16-2, the tail gas discharged from the pulse dust collector 7 firstly exchanges heat with the clean air in the tail gas heat exchanger 14, and the hot air after heat exchange enters the steam heat exchanger 16 to exchange to be cold air with the steam, the cold air is introduced into the natural direct-fired hot blast stove to be used as a cold source, and the hot steam can be used for production.
The drying tube 6 comprises a cylindrical drying straight tube 6-1 and a polygonal drying wide tube 6-2, and the drying straight tube 6-1 and the drying wide tube 6-2 are arranged in a staggered manner, as shown in fig. 5, because the flow of the drying straight tube 6-1 is smaller than that of the drying wide tube 6-2, the conveying speed of the material in the drying straight tube 6-1 is faster than that of the drying wide tube 6-2, so that the material is conveyed quickly and slowly in the drying tube, and further, under the drying tubes 6 with equal length, the time for conveying the material by the drying tube 6 with the structure is long, so that the time for the material in the drying tube 6 is prolonged, hot air is in full contact with the material, and the drying effect is greatly improved.
The cylinder wall at the rear end of the inner cylinder body is provided with 6 circles of exchange air holes 5-11 along the circumferential direction, each circle of exchange air holes 5-11 is provided with 17 exchange air holes 5-11, the diameter of each exchange air hole 5-11 is 80mm, the distance between each circle of exchange air holes 5-11 is 160mm, the exchange air holes 5-11 are arranged at the rear end of the inner cylinder body 5-2, partition wall preheating can be realized between hot air and cold air at the front end, the cold air and the hot air are preheated through the partition wall firstly and then are fully and uniformly mixed through the exchange air holes 5-11, on one hand, the temperature of the cylinder wall of the inner cylinder body 5-2 is favorably reduced, high-temperature deformation and even damage are effectively prevented, and on the other hand, the uniform temperature of the hot air at the air outlet 5-8 is further ensured.
A plurality of groups of thin crushing cutter groups 9-11 which are positioned in a splayed shape in the crushing cylinder body 9-2 are sleeved on the rotating shaft 9-8 and positioned below the crushing cutter groups 9-9, the rotating shaft 9-8 and the thin crushing cutter groups 9-11 are arranged to be in key pin transmission in the embodiment, the thin crushing cutter groups 9-11 comprise thin crushing cutters which are symmetrically and obliquely arranged at two sides of the rotating shaft 9-8, in the embodiment, 1 group of thin rotating cutter groups 9-11 are arranged on the rotating shaft 8, two thin crushing cutters are arranged, an included angle between each thin crushing cutter and the rotating shaft 9-8 is 45 degrees, the missed large materials and the materials crushed by the crushing cutter groups 9-9 are continuously crushed, dried and blown out by hot air flow, and all the formed materials entering the crushing cylinder body 9-2 are crushed, greatly improves the drying and crushing rate and improves the utilization rate of the materials, thereby being beneficial to improving the yield of manganese sulfate.
The joints of the rotating shaft 9-8, the crushing cutter set 9-9 and the fine crushing cutter set 9-11 are all sealed by air seals 9-12, so that crushed materials and dust particles mixed with the crushed materials are effectively prevented from entering the rotating shaft 9-8, the rotating shaft 9-8 is prevented from being broken or even damaged, and the rotating shaft 9-8 is ensured to rotate normally.
When the invention is used: the manganese sulfate drying device is started, wet manganese sulfate separated by a solid-liquid centrifuge 1 enters an airflow crusher 9 under the action of a packing auger conveyor 3, a natural gas direct combustion type hot blast stove 5 generates hot air with uniform temperature under the action of an exchange air hole 5-12, the hot air enters the airflow crusher 9 under the action of an air blower 4, the wet manganese sulfate is crushed by a crushing knife set 9-9 and a fine crushing knife set 9-11 and then is conveyed to a drying pipe 6 under the action of vortex airflow, the wet manganese sulfate is conveyed at high speed and low speed under the structural action of the staggered arrangement of a straight drying pipe 6-1 and a wide drying pipe 6-2, the drying effect of the materials in the drying pipe 6 is improved, the materials in the drying pipe 6 enter a hopper 7-2 of a pulse dust collector 7 under the action of wind power, the air after dust removal and moisture removal enters an air conveying chute 7-4 through a chute air feeder 7-5, the method comprises the steps of replacing drying tail gas mixed with materials falling from a hopper 7-2 out of a dust removal box body 7-1, discharging the drying tail gas out of an exhaust pipe 8 from a gas outlet 7-8 after dust removal, conveying the materials subjected to solid-gas separation into a vibrating screen 10 while cooling under the action of air, removing metal impurities through an iron remover 12, then entering a manganese sulfate bin for storage, sequentially entering a tail gas heat exchanger 14 and a steam heat exchanger 16 for heat exchange and cooling under the action of a draught fan 13, intensively discharging the cooled drying tail gas through a tail gas discharge pipe 14-1, wherein the generated hot steam can be used for production, the generated cold air is introduced into a natural gas direct-fired hot blast stove 5 for use, and the drying flow chart is shown in fig. 6.
It is to be understood that the foregoing detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes in the principle, construction and construction of the invention will become apparent to those skilled in the art from this detailed description.
Claims (5)
1. The manganese sulfate drying device based on the hot blast stove comprises a plurality of solid-liquid centrifuges (1), wherein the solid-liquid centrifuges (1) are connected with a packing auger conveyor (3), the manganese sulfate drying device further comprises an air blower (4), the air blower (4) is connected with a natural gas direct combustion type hot blast stove (5) through a pipeline, the natural gas direct combustion type hot blast stove (5) comprises an outer barrel (5-1) and an inner barrel (5-2) coated by the outer barrel (5-1), two ends of the inner barrel (5-2) extend out of the outer barrel (5-1), the front end of the outer barrel (5-1) is connected with the inner barrel (5-2) through a fixed barrel (5-3), an air inlet hole (5-4) is formed in the position, close to the fixed barrel (5-3), of the outer barrel (5-1), a heat insulation layer (5-5) is coated on the outer wall of the outer barrel (5-1), the lower end of the outer cylinder body (5-1) is provided with a plurality of supporting supports (5-6), the center of the front end of the inner cylinder body (5-2) is provided with a natural gas burner (5-7) penetrating through the fixed cylinder, the rear end of the inner cylinder body (5-2) is provided with an air outlet (5-8), the dust remover further comprises a drying pipe (6), the drying pipe (6) is connected with a pulse dust remover (7), the pulse dust remover (7) comprises a dust removing box body (7-1) and a hopper (7-2) arranged below the dust removing box body (7-1), and an air outlet (7-3) on the dust removing box body (7-1) is connected with an exhaust pipe (8); the method is characterized in that: the rear end of an outer cylinder (5-1) of the natural gas direct-fired hot blast stove (5) is connected with an inner cylinder (5-2) through a sealed heat-preservation cylinder (5-9), the inner wall of the front end of the inner cylinder (5-2) and positioned at two sides of a natural gas burner (5-7) is provided with a pouring protective layer (5-10), the cylinder wall of the rear end of the inner cylinder (5-2) is provided with a plurality of circles of air exchange holes (5-11) along the circumferential direction, and each circle of air exchange holes (5-11) are uniformly arranged on the cylinder wall of the inner cylinder (5-2); an airflow crusher (9) is arranged between the blower (4) and the drying pipe (6), the airflow crusher (9) comprises a main machine base (9-1), a crushing chamber and a crushing device, the crushing chamber is arranged on the main machine base (9-1), the crushing chamber comprises a crushing cylinder (9-2) arranged on the main machine base (9-1) and a feeding and discharging conical opening (9-3) which is arranged above the crushing cylinder (9-2) and communicated with the crushing cylinder, the crushing cylinder (9-2) is cylindrical and hollow, an air inlet volute (9-4) which coats the crushing cylinder (9-2) is arranged on the outer side of the crushing cylinder (9-2), the air inlet volute (9-4) is in gas communication with the crushing cylinder (9-2), a cleaning opening (9-5) which is communicated with the inside of the crushing cylinder (9-2) is arranged at the bottom end of the crushing cylinder (9-2), the crushing device comprises a crushing motor (9-6) fixed on a host machine base (9-1), the crushing motor (9-6) is connected with a rotating shaft (9-8) vertically arranged on the host machine base (9-1) through a belt (9-7), the front end of the rotating shaft (9-8) extends out of the host machine base (9-1) and then extends into a crushing cylinder (9-2), a plurality of groups of crushing cutter groups (9-9) positioned in the crushing cylinder (9-2) are arranged in parallel from top to bottom on the rotating shaft (9-8), each group of crushing cutter groups (9-9) comprises two crushing cutters arranged on the same horizontal plane of the rotating shaft (9-8), a rotary inverted cone (9-10) is sleeved on the rotating shaft (9-8) and positioned below the fine crushing cutter groups (9-9), the rotary inverted cone (9-10) is used for guiding and pushing the dropped large materials to the cleaning opening (9-5); the discharge port of the drying pipe (6) is connected with an air inlet (7-8) arranged at the side end of a hopper (7-2) of the pulse dust collector (7), the bottom end of the hopper (7-2) is connected with an air delivery chute (7-4) capable of degassing and cooling and being sealed, the bottom end of the air delivery chute (7-4) is arranged obliquely downwards, the bottom end of the air delivery chute (7-4) is provided with a falling pore plate (7-4-1) and filter cloth (7-4-2) from top to bottom, an observation window (7-4-3) is further arranged on the air delivery chute (7-4), the oblique high end of the air delivery chute (7-4) is provided with a chute air inlet (7-4-4), and the chute air inlet (7-4-4) is connected with a chute air feeder (7-5) through a pipeline, the chute blower (7-5) is connected with the dehumidifier (7-6) through a pipeline, the dehumidifier (7-6) is connected with the dedusting air box (7-7) through a pipeline, and a chute material outlet (7-4-5) is formed in the inclined bottom end of the air delivery chute (7-4); the chute material outlet (7-5) is connected with a vibrating screen (10) through a pipeline, and the vibrating screen (10) is connected with a manganese sulfate bin (12) through a blanking conveying component (2) with an iron remover (11); blast pipe (8) are connected with draught fan (13), draught fan (13) are connected with tail gas heat exchanger (14) through the pipeline, tail gas discharge pipe (14-1) have been seted up on tail gas heat exchanger (14), tail gas heat exchanger (14) are connected with clean air case (15) through the pipeline, just tail gas heat exchanger (14) are connected with steam heat exchanger (16) through the pipeline, steam heat exchanger (16) are connected with natural gas direct combustion formula hot-blast furnace (5) through the pipeline, the upper end of steam heat exchanger (16) one side is equipped with steam and advances pipe (16-1), the lower extreme is equipped with steam exit tube (16-2).
2. The hot-blast stove-based manganese sulfate drying device according to claim 1, characterized in that: the drying pipes (6) comprise cylindrical drying straight pipes (6-1) and polygonal drying wide pipes (6-2), and the drying straight pipes (6-1) and the drying wide pipes (6-2) are arranged in a staggered mode.
3. The hot-blast stove-based manganese sulfate drying device according to claim 1 or 2, characterized in that: the cylinder wall at the rear end of the inner cylinder body (5-2) is provided with 6 circles of exchange air holes (5-11) along the circumferential direction, each circle of exchange air holes is provided with 17 exchange air holes (5-11), the diameter of each exchange air hole (5-11) is 80mm, and the distance between every two circles of exchange air holes (5-11) is 160 mm.
4. The hot-blast stove-based manganese sulfate drying device according to claim 3, wherein: the fine crushing cutter set is characterized in that a plurality of groups of fine crushing cutter sets (9-11) which are splayed in the crushing cylinder body (9-2) are sleeved on the rotating shaft (9-8) and below the crushing cutter sets (9-9), and the fine crushing cutter sets (9-11) comprise fine crushing cutters which are symmetrically arranged on two sides of the rotating shaft (9-8) in an inclined mode.
5. The hot-blast stove-based manganese sulfate drying device according to claim 4, wherein: the joints of the rotating shaft (9-8) and the crushing cutter set (9-9) and the fine crushing cutter set (9-11) are all sealed by air seals (9-12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210638117.7A CN114877623A (en) | 2022-06-07 | 2022-06-07 | Manganese sulfate drying device based on hot-blast stove |
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| CN202210638117.7A CN114877623A (en) | 2022-06-07 | 2022-06-07 | Manganese sulfate drying device based on hot-blast stove |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118816518A (en) * | 2024-09-18 | 2024-10-22 | 绍兴上虞杭协热电有限公司 | A boiler flue gas hot air drying device for drying combustion raw materials |
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2022
- 2022-06-07 CN CN202210638117.7A patent/CN114877623A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118816518A (en) * | 2024-09-18 | 2024-10-22 | 绍兴上虞杭协热电有限公司 | A boiler flue gas hot air drying device for drying combustion raw materials |
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