CN112090182B - Dry dedusting system for proportioning roller of sintering machine - Google Patents
Dry dedusting system for proportioning roller of sintering machine Download PDFInfo
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- CN112090182B CN112090182B CN202010979178.0A CN202010979178A CN112090182B CN 112090182 B CN112090182 B CN 112090182B CN 202010979178 A CN202010979178 A CN 202010979178A CN 112090182 B CN112090182 B CN 112090182B
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- 238000005245 sintering Methods 0.000 title claims abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 200
- 239000003546 flue gas Substances 0.000 claims abstract description 200
- 239000000428 dust Substances 0.000 claims abstract description 102
- 238000002156 mixing Methods 0.000 claims abstract description 23
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 20
- 230000023556 desulfurization Effects 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000005453 pelletization Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 40
- 239000000523 sample Substances 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 17
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000029058 respiratory gaseous exchange Effects 0.000 description 5
- 238000013329 compounding Methods 0.000 description 4
- 230000029087 digestion Effects 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Treating Waste Gases (AREA)
Abstract
The application discloses sintering machine batching cylinder dry process dust pelletizing system includes: a main desulphurization raw flue gas pipeline; a main desulphurization raw flue gas pipeline communicated with the main desulphurization raw flue gas pipeline; a mixing flue gas pipeline; the pressure-equalizing constant-temperature flue gas heat exchange device is communicated with the desulfurization raw flue gas branch pipeline and the mixed flue gas pipeline; the dust removal device is connected with the pressure-equalizing constant-temperature flue gas heat exchange device; the dust collecting mechanism is arranged at the lower end of the dust removing device; the purified flue gas output mechanism is arranged at the upper end of the dust removal device; the purified flue gas output mechanism is communicated with the main desulphurization raw flue gas pipeline. Compared with the prior art, the problem that the dust removal pipeline and the dust removal facility are blocked and bonded can be solved, and the dust removal operation can be ensured to continuously run up to the standard.
Description
Technical Field
The application relates to the technical field of industrial dust removal, in particular to a dry dust removal system for a burdening roller of a sintering machine.
Background
In the process of producing sintered ore by a sintering machine in the iron and steel industry, a sintering batching system is provided with a primary roller and a secondary roller which are respectively responsible for different batching operations, wherein the primary roller is responsible for a uniform mixing process, process water is added into the rollers to carry out a digestion reaction on the slaked lime, and raw materials are uniformly mixed; the secondary roller is responsible for the granulation process, and the process water is continuously added into the roller, so that the raw materials are basically adhered into a fine particle shape.
The inlet and outlet of the primary roller and the outlet of the secondary roller are both belt conveying materials, breathing openings are formed in the upper portions of the rollers, the temperature in the rollers rises during slaking and mixing rotation of quick lime, generated hot flue gas is discharged through the breathing openings, the hot flue gas contains sintering raw materials, dust emission concentration is high, peripheral dust reduction amount is large, and dust deposition of equipment and a roof is serious.
In the prior art, the accumulated dust is mainly removed by the water washing dust removal device at present, and because in the flue gas conveying process, the flue gas humidity is large, the dew condensation phenomenon gradually appears on the inner surfaces of the on-way pipeline and the dust removal facility, the mixed slurry blocks the dust removal pipeline, and the operation stability and the dust removal effect of the dust removal facility are very influenced.
Therefore, how to provide a sintering machine batching cylinder dry dedusting system can overcome the problem that a dedusting pipeline and a dedusting facility are blocked and bonded, and ensure that the dedusting work can continuously run up to the standard, which becomes a technical problem to be solved by technical personnel in the field.
Disclosure of Invention
In order to solve the technical problem, the application provides a sintering machine batching cylinder dry process dust pelletizing system, and it can overcome dust removal pipeline, dust removal facility and block up the problem of bonding, guarantees the sustainable up to standard operation of dust removal work.
The technical scheme provided by the application is as follows:
the application provides a sintering machine batching cylinder dry process dust pelletizing system includes: a main desulphurization raw flue gas pipeline; a main desulphurization raw flue gas pipeline communicated with the main desulphurization raw flue gas pipeline; a mixing flue gas pipeline; the pressure-equalizing constant-temperature flue gas heat exchange device is communicated with the desulfurization raw flue gas branch pipeline and the mixed flue gas pipeline; the dust removal device is connected with the pressure-equalizing constant-temperature flue gas heat exchange device; the dust collecting mechanism is arranged at the lower end of the dust removing device; the purified flue gas output mechanism is arranged at the upper end of the dust removal device; the purified flue gas output mechanism is communicated with the main desulphurization raw flue gas pipeline.
Further, in a preferred mode of the present invention, the pressure-equalizing and constant-temperature flue gas heat exchange device includes: the heat exchange gas inlet pipeline is communicated with the desulfurization raw flue gas branch pipeline and the material mixing flue gas pipeline; the heat exchange bin is communicated with the heat exchange air inlet pipeline; a heat exchange bin ash hopper arranged at the lower end of the heat exchange bin; the ash discharge valve is arranged on the ash bucket of the heat exchange bin; and the heat exchange exhaust pipeline is arranged at the upper end of the heat exchange bin.
Further, in a preferred aspect of the present invention, the method further includes: a self-operated pressure regulating valve arranged on the mixed material flue gas pipeline; the pressure sensor is connected with the self-operated pressure regulating valve through signals and is used for sensing the gas pressure in the heat exchange exhaust pipeline; and the pressure measuring probe is connected with the pressure sensor through a signal.
Further, in a preferred mode of the invention, when the temperature of the mixed flue gas is less than 80 ℃, the opening degree of the valve blade of the self-operated temperature regulating valve is increased until the temperature of the mixed flue gas in the heat exchange exhaust pipeline reaches more than 80 ℃; when the temperature of the mixed flue gas in the heat exchange exhaust pipeline is higher than 85 ℃, the opening degree of the valve blade of the self-operated temperature regulating valve is reduced until the temperature of the mixed flue gas in the heat exchange exhaust pipeline reaches less than 85 ℃.
Further, in a preferred aspect of the present invention, the method further includes: the self-operated temperature regulating valve is arranged on the desulfurization raw flue gas branch pipeline; the temperature sensor is connected with the temperature regulating valve through signals and is used for sensing the temperature of the flue gas in the heat exchange exhaust pipeline; and the temperature measuring probe is arranged on the heat exchange exhaust pipeline and is in signal connection with the temperature sensor.
Further, in a preferred mode of the invention, when the static pressure of the blending flue gas is less than 300pa, the opening degree of the valve blade of the self-operated pressure regulating valve is increased until the pressure of the blending flue gas in the heat exchange exhaust pipeline reaches more than 300 pa; when the pressure of the mixed flue gas is larger than 320pa, the opening degree of the valve blade of the self-operated temperature regulating valve is reduced until the pressure of the mixed flue gas in the heat exchange exhaust pipeline reaches smaller than 320 pa.
Further, in a preferred mode of the present invention, the pressure-equalizing and constant-temperature flue gas heat exchange device further includes: and the heat insulation layer structure is arranged on the periphery of the heat exchange bin.
Further, in a preferred mode of the present invention, the dust collecting mechanism includes: the dust removing ash bucket is arranged at the lower end of the dust removing device; the pneumatic bin pump is arranged at the tail end of the dust removing ash bucket; the ash conveying pipeline is connected with the pneumatic bin pump; and the ash storage bin is connected with the ash conveying pipeline.
Further, in a preferred mode of the present invention, the purified flue gas output means includes: the purified flue gas pipeline is communicated with the dust removal device and the main desulphurization raw flue gas pipeline; and the dust removal fan is arranged on the flue gas purification pipeline.
Further, in a preferred mode of the present invention, the dust removing device includes: a dust chamber; and the bag-type dust remover is arranged in the dust removing chamber.
Compared with the prior art, the dry dedusting system for the proportioning roller of the sintering machine, provided by the invention, comprises the following steps: a main desulphurization raw flue gas pipeline; a main desulphurization raw flue gas pipeline communicated with the main desulphurization raw flue gas pipeline; a mixing flue gas pipeline; the pressure-equalizing constant-temperature flue gas heat exchange device is communicated with the desulfurization raw flue gas branch pipeline and the mixed flue gas pipeline; the dust removal device is connected with the pressure-equalizing constant-temperature flue gas heat exchange device; the dust collecting mechanism is arranged at the lower end of the dust removing device; the purified flue gas output mechanism is arranged at the upper end of the dust removal device; the purified flue gas output mechanism is communicated with the main desulphurization raw flue gas pipeline. The application relates to a technical scheme, compare in prior art, it can overcome dust removal pipeline, dust removal facility and block up the problem of bonding, guarantees the sustainable standard operation of dust removal work.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow diagram of a dry dedusting system for a burdening roller of a sintering machine according to an embodiment of the present invention;
fig. 2 is a schematic view of a pressure-equalizing constant-temperature flue gas heat exchange device according to an embodiment of the invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "first," "second," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
As shown in fig. 1 to fig. 2, a sintering machine batching roller dry dedusting system provided in the embodiment of the present application includes: a main desulphurization raw flue gas pipeline 1; a desulphurization raw flue gas branch pipeline 2 communicated with the desulphurization raw flue gas main pipeline 1; a mixing flue gas pipeline 3; the pressure-equalizing constant-temperature flue gas heat exchange device 4 is communicated with the desulfurization raw flue gas branch pipeline and the mixed flue gas pipeline 3; the dust removal device 5 is connected with the pressure-equalizing constant-temperature flue gas heat exchange device; a dust collecting mechanism 6 arranged at the lower end of the dust removing device 5; the purified flue gas output mechanism 7 is arranged at the upper end of the dust removal device 5; the purified flue gas output mechanism 7 is communicated with the main desulphurization raw flue gas pipeline 1.
The embodiment of the invention provides a dry dedusting system for a proportioning roller of a sintering machine, which specifically comprises the following steps: a main desulphurization raw flue gas pipeline 1; a desulphurization raw flue gas branch pipeline 2 communicated with the desulphurization raw flue gas main pipeline 1; a mixing flue gas pipeline 3; the pressure-equalizing constant-temperature flue gas heat exchange device 4 is communicated with the desulfurization raw flue gas branch pipeline 2 and the mixed flue gas pipeline 3; the dust removal device 5 is connected with the pressure-equalizing constant-temperature flue gas heat exchange device; a dust collecting mechanism 6 arranged at the lower end of the dust removing device 5; the purified flue gas output mechanism 7 is arranged at the upper end of the dust removal device 5; the purified flue gas output mechanism 7 is communicated with the main desulphurization raw flue gas pipeline 1. The application relates to a technical scheme, compare in prior art, it can overcome dust removal pipeline, dust removal facility and block up the problem of bonding, guarantees the sustainable standard operation of dust removal work.
Specifically, in the embodiment of the present invention, the pressure-equalizing constant-temperature flue gas heat exchange device includes: a heat exchange air inlet pipeline 401 communicated with the desulfurization raw flue gas branch pipeline and the material mixing flue gas pipeline 3; a heat exchange bin 402 communicated with the heat exchange air inlet pipeline 401; a heat exchange ash hopper 403 mounted at the lower end of the heat exchange bin 402; an ash discharge valve 404 mounted on the ash transfer bin 403; a heat exchange exhaust duct 405 is installed at the upper end of the heat exchange chamber 402. Furthermore, a cyclone separator is arranged at the upper part of the inner side of the heat exchange bin 402 and used for realizing simple separation of coarse ash and flue gas, and the arrangement of the cyclone separator reduces the operation load of the bag-type dust collector.
Specifically, in the embodiment of the present invention, the pressure-equalizing constant-temperature flue gas heat exchange device further includes: a self-operated pressure regulating valve 406 mounted on the mixing flue gas pipeline 3; the pressure sensor 407 is connected with the self-operated pressure regulating valve 406 through a signal and is used for sensing the gas pressure in the heat exchange exhaust pipeline 405; and the pressure measuring probe 408 is connected with the pressure sensor 407 through a signal.
Specifically, in the embodiment of the invention, when the temperature of the mixed flue gas is less than 80 ℃, the opening degree of the valve blade of the self-operated temperature regulating valve 409 is increased until the temperature of the mixed flue gas in the heat exchange exhaust pipeline 405 reaches more than 80 ℃; when the temperature of the mixed flue gas in the heat exchange exhaust pipeline 405 is higher than 85 ℃, the opening degree of the valve blade of the self-operated temperature regulating valve 409 is reduced until the temperature of the mixed flue gas in the heat exchange exhaust pipeline 405 reaches less than 85 ℃.
Specifically, in the embodiment of the present invention, the pressure-equalizing constant-temperature flue gas heat exchange device 4 further includes: a self-operated temperature regulating valve 409 arranged on the desulphurization raw flue gas branch pipeline; the temperature sensor 410 is connected with the temperature regulating valve through signals and is used for sensing the temperature of the flue gas in the heat exchange exhaust pipeline 405; and the temperature measuring probe 411 is arranged on the heat exchange exhaust pipeline 405 and is connected with the temperature sensor 410 through signals.
Specifically, in the embodiment of the present invention, when the static pressure of the blending flue gas is less than 300pa, the opening of the valve blade of the self-operated pressure regulating valve 406 is increased until the pressure of the blending flue gas in the heat exchange exhaust pipeline 405 reaches more than 300 pa; when the pressure of the mixed flue gas is greater than 320pa, the opening degree of the valve blade of the self-operated temperature regulating valve 409 is reduced until the pressure of the mixed flue gas in the heat exchange exhaust pipeline 405 reaches less than 320 pa.
Specifically, in the embodiment of the present invention, the pressure-equalizing constant-temperature flue gas heat exchange device further includes: and an insulating layer structure 412 arranged on the periphery of the heat exchange bin 402.
Specifically, in the present embodiment, the dust collection mechanism 6 includes: a dust removing hopper 601 mounted at the lower end of the dust removing device 5; a pneumatic bin pump 602 arranged at the tail end of the dust removing hopper 601; an ash conveying pipe 603 connected to the pneumatic bin pump 602; and the ash storage bin is connected with the ash conveying pipeline 603.
Specifically, in the embodiment of the present invention, the purified flue gas output mechanism 7 includes: a purified flue gas pipeline 701 communicated with the dust removal device 5 and the main desulphurization raw flue gas pipeline 1; and the dust removal fan 702 is arranged on the purified flue gas pipeline 701.
Specifically, in the embodiment of the present invention, the dust removing device 5 includes: a dust chamber 501; and the bag-type dust collector 502 is arranged in the dust chamber 501.
More specifically, in the process of producing sintered ore by a sintering machine in the steel industry, a sintering batching system is provided with a primary roller and a secondary roller which are respectively responsible for different batching operations, the primary roller is responsible for the uniform mixing process, process water is added into the roller to carry out digestion reaction on the slaked lime, the raw materials are uniformly mixed, the secondary roller is responsible for the granulation process, the process water is continuously added into the roller, and the raw materials are basically adhered into fine particles.
The inlet and outlet of the primary roller and the secondary roller are belt conveying materials, and 2 breathing openings are arranged above the rollers and 4 breathing openings are arranged in total. In the quicklime digestion and rotating material mixing process, the temperature in the roller rises (the discharge temperature is related to the quicklime digestion condition), the generated hot flue gas is discharged through the breathing port, the hot flue gas contains sintering raw materials, the dust discharge concentration is high, the peripheral dust reduction amount is large, and the dust deposition of equipment and a roof is serious.
According to the dry-method dust removal system for the proportioning roller of the sintering machine, when the dry-method dust removal device works, the dust removal fan is started, the pressure-equalizing constant-temperature flue gas heat exchange device is opened, the desulfurized raw flue gas enters the pressure-equalizing constant-temperature flue gas heat exchange device from the desulfurized raw flue gas main pipeline through the desulfurized raw flue gas pipeline, and meanwhile the mixed flue gas enters the pressure-equalizing constant-temperature flue gas heat exchange device through the mixed flue gas pipeline.
The former flue gas of desulfurization and compounding flue gas are behind the inside even heat transfer of voltage-sharing constant temperature flue gas heat transfer device, and the way gets into the dust remover through voltage-sharing constant temperature flue gas heat transfer device exhaust duct, and the dust remover work is strained the dust removal ash that produces after the entrapment through the sack and is got into the ash bucket, and the dust removal ash is through pneumatic storehouse pump pressurization, send outward through ash conveying pipeline.
The mixed flue gas after heat exchange is filtered by a dust remover to generate clean flue gas, and the clean flue gas finally returns to the original desulphurization flue gas main pipeline through a dust removal fan and a clean flue gas pipeline to be sent for desulphurization.
The pressure-equalizing constant-temperature flue gas heat exchange device relates to a mixed flue gas pipeline, a pressure measuring probe, a pressure sensor, a self-operated pressure regulating valve, a desulfurization original flue gas pipeline, a self-operated temperature regulating valve, a pressure-equalizing constant-temperature flue gas heat exchange device air inlet pipeline, a temperature sensor, a temperature measuring probe, a heat exchange bin, a heat insulation layer, an ash hopper, an ash discharging valve and a pressure-equalizing constant-temperature flue gas heat exchange device exhaust pipeline.
When the pressure-equalizing constant-temperature flue gas heat exchange device works, the valve of the self-operated pressure regulating valve is opened, the mixed flue gas is introduced through the mixed flue gas pipeline, enters the air inlet pipeline of the pressure-equalizing constant-temperature flue gas heat exchange device after passing through the self-operated pressure regulating valve, and then enters the heat exchange bin.
When the valve of the self-operated pressure regulating valve is opened, the valve of the self-operated temperature regulating valve is opened, the desulfurized raw flue gas is introduced through the desulfurized raw flue gas pipeline, enters the air inlet pipeline of the pressure-equalizing constant-temperature flue gas heat exchange device after passing through the self-operated temperature regulating valve, and then enters the heat exchange bin, and the heat exchange bin and the ash bucket outer layer are provided with heat preservation layers in a fully-sealed mode, so that the thermal loss is reduced.
The inlet pipeline of the pressure-equalizing constant-temperature flue gas heat exchange device enters the heat exchange bin as a tangent line, the original flue gas and the mixed flue gas after desulfurization are subjected to cyclone centrifugal solid-gas separation in the heat exchange bin during uniform heat exchange, dust is settled to an ash hopper for storage, and is periodically discharged through an ash discharge valve, and the mixed flue gas after uniform heat exchange separation rises in the heat exchange bin and is discharged through the exhaust pipeline of the pressure-equalizing constant-temperature flue gas heat exchange device, and finally enters the next treatment process.
When the constant temperature system works automatically, the blade part of the self-operated temperature regulating valve is opened, the temperature measuring probe measures the temperature of the mixed flue gas in the exhaust pipeline of the pressure-equalizing constant-temperature flue gas heat exchange device, a temperature signal is fed back to the self-operated temperature regulating valve through the temperature sensor, when the temperature of the mixed flue gas is less than 80 ℃, the opening degree of the valve blade of the self-operated temperature regulating valve is increased until the temperature of the mixed flue gas in the exhaust pipeline of the pressure-equalizing constant-temperature flue gas heat exchange device reaches more than 80 ℃, and when the temperature of the mixed flue gas is more than 85 ℃, the opening degree of the valve blade of the self-operated temperature regulating valve is reduced until the temperature of the mixed flue gas in the exhaust pipeline of the pressure-equalizing constant-temperature flue gas heat exchange device reaches less than 85 ℃.
When the constant pressure system works in a self-regulating mode, the blade part of the self-operated pressure regulating valve is opened, the pressure measuring probe measures the pressure of the mixed flue gas in the exhaust pipeline of the pressure-equalizing constant-temperature flue gas heat exchange device, a pressure signal is fed back to the self-operated pressure regulating valve through the pressure sensor, when the static pressure of the mixed flue gas is smaller than 300pa, the opening degree of the valve blade of the self-operated pressure regulating valve is increased until the pressure of the mixed flue gas in the exhaust pipeline of the pressure-equalizing constant-temperature flue gas heat exchange device reaches more than 300 pa; when the pressure of the mixed flue gas is larger than 320pa, the opening degree of the valve blade of the self-operated temperature regulating valve is reduced until the pressure of the mixed flue gas in the exhaust pipeline of the pressure-equalizing constant-temperature flue gas heat exchange device reaches smaller than 320 pa.
The technical scheme provided by the embodiment of the invention has the following effects:
first, even heat transfer between the former flue gas of desulfurization (145 ℃) and compounding flue gas (45 ℃) can be guaranteed to voltage-sharing constant temperature flue gas heat transfer device, and mixing flue gas temperature and compounding flue gas pressure automatically regulated guarantee that the great compounding flue gas of humidity lasts the constant temperature and carries, and the low temperature dewfall phenomenon does not appear on the way, solves pipeline and equipment blocking problem.
Second, the flue gas after even heat transfer passes through high-efficient sack cleaner, and the particulate matter is up to standard discharges, and the sulphide pollutant that the former flue gas of desulfurization that takes out simultaneously contains returns the former flue gas big pipeline of desulfurization through booster fan, and whole journey smokeless gas leaks, and former hot flue gas particulate matter clearance reaches more than 99.9%, solves the problem that current dust collector can't last the operation.
Thirdly, the dust removed by the dust collector is conveyed by a pneumatic bin pump (or conveyed by a buried scraper), so that continuous dust conveying can be realized, the dust can be continuously conveyed back to a blending bin, and the problem of secondary pollution of sludge generated by a water washing dust removing device is solved.
Fourthly, when the pressure-equalizing constant-temperature flue gas heat exchange device realizes self-regulation of pressure and temperature, the heat exchange bin can realize a cyclone dust removal function, coarse ash and flue gas are simply separated through cyclone centrifugation, and the load of the bag-type dust remover is reduced.
In addition, the problem that the flue gas of the sintering proportioning roller cannot be dedusted by a dry cloth bag is solved, the clean flue gas returns to the original desulfurization flue gas pipeline, the rear end of the clean flue gas further enters a desulfurization and denitrification dedusting system, the leakage and the emission of pollutants are avoided, and the whole system runs automatically without secondary pollution.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a sintering machine batching cylinder dry process dust pelletizing system which characterized in that includes:
a main desulphurization raw flue gas pipeline;
a main desulphurization raw flue gas pipeline communicated with the main desulphurization raw flue gas pipeline;
a mixing flue gas pipeline;
the pressure-equalizing constant-temperature flue gas heat exchange device is communicated with the desulfurization raw flue gas branch pipeline and the mixed flue gas pipeline;
the dust removal device is connected with the pressure-equalizing constant-temperature flue gas heat exchange device;
the dust collecting mechanism is arranged at the lower end of the dust removing device;
the purified flue gas output mechanism is arranged at the upper end of the dust removal device;
the purified flue gas output mechanism is communicated with the main desulfurization raw flue gas pipeline; the pressure-equalizing constant-temperature flue gas heat exchange device comprises: the heat exchange gas inlet pipeline is communicated with the desulfurization raw flue gas branch pipeline and the material mixing flue gas pipeline; the heat exchange bin is communicated with the heat exchange air inlet pipeline; a heat exchange bin ash hopper arranged at the lower end of the heat exchange bin; the ash discharge valve is arranged on the ash bucket of the heat exchange bin; the heat exchange exhaust pipeline is arranged at the upper end of the heat exchange bin; and the air inlet pipeline of the pressure-equalizing constant-temperature flue gas heat exchange device enters the heat exchange bin tangentially.
2. The dry dedusting system for the burdening drum of the sintering machine according to claim 1, further comprising: the self-operated pressure regulating valve is arranged on the mixing flue gas pipeline; the pressure sensor is connected with the self-operated pressure regulating valve through signals and is used for sensing the gas pressure in the heat exchange exhaust pipeline; and the pressure measuring probe is connected with the pressure sensor through a signal.
3. The dry dedusting system for the proportioning roller of the sintering machine according to claim 2, wherein when the static pressure of the blending flue gas is less than 300pa, the opening degree of a valve blade of the self-operated pressure regulating valve is increased until the pressure of the blending flue gas in the heat exchange exhaust pipeline reaches more than 300 pa; when the pressure of the mixed flue gas is larger than 320pa, the opening degree of the valve blade of the self-operated temperature regulating valve is reduced until the pressure of the mixed flue gas in the heat exchange exhaust pipeline reaches smaller than 320 pa.
4. The dry dedusting system for the burdening drum of the sintering machine according to claim 3, further comprising: the self-operated temperature regulating valve is arranged on the desulfurization raw flue gas branch pipeline; the temperature sensor is connected with the temperature regulating valve through signals and is used for sensing the temperature of the flue gas in the heat exchange exhaust pipeline; and the temperature measuring probe is arranged on the heat exchange exhaust pipeline and is in signal connection with the temperature sensor.
5. The dry dedusting system for the proportioning roller of the sintering machine according to claim 4, wherein when the temperature of the mixed flue gas is less than 80 ℃, the opening degree of a valve blade of the self-operated temperature regulating valve is increased until the temperature of the mixed flue gas in the heat exchange exhaust pipeline reaches more than 80 ℃; when the temperature of the mixed flue gas in the heat exchange exhaust pipeline is higher than 85 ℃, the opening degree of the valve blade of the self-operated temperature regulating valve is reduced until the temperature of the mixed flue gas in the heat exchange exhaust pipeline reaches less than 85 ℃.
6. The dry dedusting system for the proportioning roller of the sintering machine according to claim 2, wherein the pressure-equalizing constant-temperature flue gas heat exchange device further comprises: and the heat insulation layer structure is arranged on the periphery of the heat exchange bin.
7. The dry dedusting system for the batching drum of a sintering machine according to claim 1, wherein the dust collecting mechanism comprises: the dust removing ash bucket is arranged at the lower end of the dust removing device; the pneumatic bin pump is arranged at the tail end of the dust removing ash bucket; the ash conveying pipeline is connected with the pneumatic bin pump; and the ash storage bin is connected with the ash conveying pipeline.
8. The dry dedusting system for the proportioning cylinder of the sintering machine according to claim 1, wherein the purified flue gas output mechanism comprises: the purified flue gas pipeline is communicated with the dust removal device and the main desulphurization raw flue gas pipeline; and the dust removal fan is arranged on the flue gas purification pipeline.
9. The dry dedusting system for the burdening drum of the sintering machine according to any one of claims 1 to 8, wherein the dedusting device comprises: a dust chamber; and the bag-type dust remover is arranged in the dust removing chamber.
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| CN202010979178.0A CN112090182B (en) | 2020-09-17 | 2020-09-17 | Dry dedusting system for proportioning roller of sintering machine |
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Effective date of registration: 20221114 Address after: 417000 Shuangling building, no.1005, Gangui Road, Huangnitang, Louxing District, Loudi City, Hunan Province Patentee after: Hunan Valin Lianyuan Iron & Steel Co., Ltd. Address before: 417009 Gangdu garden, Louxing District, Loudi City, Hunan Province Patentee before: Cao Zhenwu Patentee before: Qin Rui |