CN218120654U - Sintering production line is with hierarchical recovery cooling device - Google Patents
Sintering production line is with hierarchical recovery cooling device Download PDFInfo
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- CN218120654U CN218120654U CN202222511457.1U CN202222511457U CN218120654U CN 218120654 U CN218120654 U CN 218120654U CN 202222511457 U CN202222511457 U CN 202222511457U CN 218120654 U CN218120654 U CN 218120654U
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- 238000001816 cooling Methods 0.000 title claims abstract description 78
- 238000005245 sintering Methods 0.000 title claims abstract description 66
- 238000011084 recovery Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 174
- 239000003546 flue gas Substances 0.000 claims abstract description 174
- 239000002918 waste heat Substances 0.000 claims abstract description 68
- 239000000112 cooling gas Substances 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 6
- 239000000779 smoke Substances 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 235000019640 taste Nutrition 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 description 14
- 239000002912 waste gas Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009865 steel metallurgy Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The embodiment of the utility model discloses a grading recovery cooling device for a sintering production line, which comprises a sintering circular cooler, wherein a plurality of cooling sections with sequentially reduced temperature are sequentially formed along the extension direction, and each cooling section is respectively connected with a flue gas leading-out channel and a cooling gas leading-in channel; the flue gas guide-out channels on each cooling section are respectively connected with flue gas waste heat treatment units, and the requirements of the plurality of flue gas waste heat treatment units on the grade of waste heat are sequentially reduced; each cooling gas introducing channel is communicated with a cooling gas supply unit, and the cooling gas supply unit is derived from at least one of the flue gas treated by the flue gas waste heat treatment unit, cooling air and a flue gas outlet channel in the cooling section of the cooling section rear section corresponding to the cooling gas introducing channel. The effect of no exhaust gas emission and gradient utilization of the flue gas waste heat is achieved.
Description
Technical Field
The embodiment of the utility model provides a sintering machine cooling arrangement field, concretely relates to sintering production line is with retrieving cooling device in grades.
Background
The iron and steel metallurgy enterprises are national pillar industries and also energy-consuming households, and the proportion of energy consumption to product cost is large. At present, in the domestic metallurgical industry, sintering plants generally recover waste heat of one section and two sections of a ring cooler, for example, steam is generated to generate electricity, so that the aims of saving energy and reducing consumption are fulfilled. However, for the utilization of the waste heat of three, four, five and the like sections of the circular cooler, the flue gas temperature is low, so that the waste heat is ignored by many enterprises. In fact, with the continuous development of production technology, the sintering productivity is improved year by year, so that the flue gas temperature of the last three sections is gradually improved, and the method has higher recycling value. However, although the utility value of the heat exchanger is improved to some extent, the heat exchanger is still difficult to be effectively utilized in practical application due to the temperature problem.
The temperature of the flue gas of the ring cooler is gradually reduced along one section, two sections, three sections, four sections and five sections, and the grade of the waste heat is reduced, so that the waste heat of the flue gas of the ring cooler can be recovered by following the principle of graded recovery, and the precondition can be better created for further step utilization.
Along with the stricter and stricter environmental protection policy in China, the production requirements of clean emission of waste gas and even no emission of waste gas are provided in all industries, and the sintering production line is no exception. Because the flue gas source of the circular cooler is clean air, only part of dust is mixed in the process of cooling the sinter, and other pollutants are not contained, so that the system has the precondition of realizing a system without waste gas discharge.
Therefore, it is the problem that the utility model discloses can carry out effective recycle's equipment to the waste heat of coolant for the sintering production line to provide one kind.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the utility model provides a sintering production line is with hierarchical recovery cooling device forms to a plurality of cooling sections through separating the cold machine of sintering ring to adopt different flue gas waste heat processing unit to carry out hierarchical recovery processing separately to every cooling section, simultaneously, select suitable gas (including the flue gas after retrieving) as the cooling gas supply unit according to actual conditions, thereby promoted the flue gas temperature through different forms's heated air circulation mode, realized basically not having the exhaust to discharge, accomplished the step utilization of flue gas waste heat.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
in an aspect of the embodiment of the present invention, there is provided a staged recovery cooling device for a sintering line, comprising a sintering circular cooler sequentially formed with a plurality of cooling sections with sequentially reduced temperatures along an extending direction, each of the cooling sections being respectively connected with a flue gas leading-out channel and a cooling gas leading-in channel; wherein,
the flue gas guide-out channel on each cooling section is respectively connected with a flue gas waste heat treatment unit, and the requirements of the plurality of flue gas waste heat treatment units on the taste of waste heat are sequentially reduced;
each cooling gas introduction channel is communicated with a cooling gas supply unit, and the cooling gas supply unit is derived from at least one of flue gas and cooling air treated by the flue gas waste heat treatment unit and a flue gas outlet channel in the cooling section of the cooling section rear section corresponding to the cooling gas introduction channel.
As a preferred scheme of the utility model, at least the flue gas is derived the passageway and is used for directly or indirectly providing the flue gas to the sintering machine.
As a preferred scheme of the utility model, the cooling section at least comprises a high temperature cooling section, a medium temperature cooling section and a low temperature cooling section which are arranged in sequence; and the number of the first and second groups is,
the flue gas waste heat treatment unit communicated with the high-temperature cooling section comprises a multi-pressure waste heat boiler;
the flue gas waste heat treatment unit communicated with the intermediate temperature cooling section comprises a single-pressure waste heat boiler;
and the flue gas waste heat treatment unit communicated with the low-temperature cooling section comprises a hot water boiler.
As a preferred scheme of the utility model, the high-temperature cooling section at least comprises a first high-temperature section and a second high-temperature section which are arranged in sequence, and the multi-pressure waste heat boiler at least comprises a high-temperature flue gas inlet, a low-temperature flue gas inlet and a flue gas outlet; wherein,
the flue gas of first high temperature section is derived the passageway with high temperature flue gas import intercommunication, the flue gas of second high temperature section is derived the passageway with low temperature flue gas import intercommunication, the exhanst gas outlet with at least part the cooling gas channels into the passageway and is linked together.
As an optimized scheme of the utility model, the exhanst gas outlet with first high temperature section with on the second high temperature section the leading-in passageway of cooling gas is linked together through first circulating fan separately.
As an optimized scheme of the utility model, on the medium temperature cooling section the flue gas derive the passageway with single pressure exhaust-heat boiler's the mouth that advances is linked together, single pressure exhaust-heat boiler's outlet flue with medium temperature cooling section and/or on the low temperature cooling section the leading-in passageway of cooling gas is linked together through second circulating fan.
As a preferred scheme of the utility model, the low-temperature cooling section is at least including the first low-temperature section and the second low-temperature section that set up in order, just first low-temperature section the flue gas derive the passageway with boiler is linked together.
As an optimized scheme of the utility model, the flue gas of second low temperature section derive the passageway with high temperature cooling section the medium temperature cooling section with at least one in the first low temperature section the leading-in passageway of cooling gas is linked together.
The utility model discloses an embodiment has following advantage:
the flue gas waste heat on the circular cooler is segmented and recycled in a grading manner; the flue gas temperature is increased and no waste gas emission is realized through hot air circulation modes in different forms; according to different tastes of the flue gas waste heat, the flue gas waste heat at different positions is supplied to a sintering machine to be used for hot air sintering, is supplied to a waste heat boiler to generate steam, is supplied to a hot water boiler to supply heat in winter, and is supplied to a blast furnace to supply hot air to assist combustion, so that the gradient utilization of the flue gas waste heat is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 should be apparent that the drawings in the following description are merely exemplary and that other implementation drawings may be derived from the provided drawings by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
FIG. 1 is a schematic structural view of a staged recovery cooling device for a sintering line provided in embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a staged recovery cooling device for a sintering production line provided in embodiment 2 of the present invention;
fig. 3 is a schematic structural view of a staged recovery cooling device for a sintering production line provided in embodiment 3 of the present invention;
fig. 4 is a schematic structural view of a staged recovery cooling device for a sintering production line provided in embodiment 4 of the present invention;
fig. 5 is a schematic structural view of a staged recovery cooling device for a sintering line provided in embodiment 5 of the present invention.
In the figure:
1-sintering circular cooler; 2-a flue gas outlet channel; 3-cooling gas introduction channel; 4-a multi-pressure waste heat boiler; 5-single pressure exhaust-heat boiler; 6-a hot water boiler; 7-a first high temperature section; 8-a second high temperature section; 9-high temperature flue gas inlet; 10-low temperature flue gas inlet; 11-a flue gas outlet; 12-a first circulation fan; 13-a second circulation fan; 14-a first low temperature section; 15-a second low temperature section; 16-a medium temperature cooling section; 17-a first flue gas duct; 18-a second flue gas duct; 19-a third flue gas duct; 20-a fourth flue gas duct; 21-a first blower; 22-a fifth flue gas duct; 23-a sixth flue gas duct; 24-a seventh flue gas duct; 25-a second blower; 26-eighth flue gas duct.
Detailed Description
The present invention is described in detail with reference to the specific embodiments, and other advantages and effects of the present invention will be apparent to those skilled in the art from the disclosure herein. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The usage scenes of the flue gas waste heat of the sintering circular cooler 1 are many, for example, the flue gas waste heat can be supplied to a waste heat boiler to generate steam, a sintering machine to sinter the steam, a hot water boiler 6 to heat in winter, and a blast furnace to use the flue gas waste heat as combustion-supporting air. The scenes have different requirements on the temperature of the flue gas, for example, the waste heat boiler needs high-temperature flue gas, the higher the temperature is, the higher the generated steam parameters are, and the power generation efficiency is improved when the high-temperature flue gas is supplied for waste heat power generation; and the heating hot water boiler does not need too high flue gas temperature. Based on this, the utility model discloses a hierarchical flue gas waste heat of retrieving carries out the step through the conversion mode of difference and utilizes according to the taste of waste heat again, "high-energy is high with, the low usefulness of low energy" like this, accords with the first, the two laws of thermodynamics better.
The following will explain details by specific examples.
Example 1
As shown in fig. 1, a first-stage smoke hood (corresponding to a first high-temperature section 7), a second-stage smoke hood (corresponding to a second high-temperature section 8), a third-stage smoke hood (corresponding to a medium-temperature cooling section 16), a fourth-stage smoke hood (corresponding to a first low-temperature section 14) and a fifth-stage smoke hood (corresponding to a second low-temperature section 15) are arranged on the grading recovery cooling device for the sintering production line; introducing flue gas of a first high-temperature first-stage flue hood into a high-temperature flue gas inlet 9 of a multi-pressure waste heat boiler 4 (for example, in the embodiment, a double-pressure waste heat boiler can be specifically selected) through a first flue gas pipeline 17, introducing flue gas of a second high-temperature second-stage flue hood into a low-temperature flue gas inlet 10 of the double-pressure waste heat boiler through a second flue gas pipeline 18, and blowing the cooled flue gas into a first high-temperature section 7 and a second high-temperature section 8 of a sintering ring cooler 1 through a third flue gas pipeline 19 by a first circulating fan 12 to realize hot air circulation; introducing flue gas collected by the three sections of smoke hoods with the third highest temperature into a sintering machine through a fourth flue gas pipeline 20 for hot air sintering, communicating a cooling gas introduction channel 3 on the medium temperature cooling section 16 with a first air blower 21, and blowing cooling air into the sintering ring cooling machine 1 through the first air blower 21; introducing flue gas of a fourth section of a fourth highest-temperature smoke hood into the hot water boiler 6 through a fifth flue gas pipeline 22, and blowing the cooled flue gas into the sintering circular cooler 1 through a sixth flue gas pipeline 23 by a second circulating fan 13 to realize hot air circulation; the flue gas of the five-section smoke hood with the lowest temperature is introduced into the blast furnace through a seventh flue gas pipeline 24 to be used for hot air combustion supporting, and the connected cooling gas introduction channel 3 is communicated with a second air blower 25 and blows air into the sintering circular cooler 1 through the second air blower 25.
It should be noted that, here, both the circulating fan and the blower function to introduce the cooling gas into the sintering circular cooler 1, where the circulating fan mainly introduces the treated cooling flue gas, and the blower mainly introduces air. Therefore, the cooled flue gas and air can coexist as the cooling gas, and thus, the cooling gas is more suitable to be configured according to the actual situation, and the flue gas is circulated, so that the effect of basically no exhaust gas emission is realized. For convenience of description, the circulation liquid of the output flue gas of the cooling part at the rear end to the sintering circular cooler 1 may be correspondingly configured by adopting the structure of the second circulation fan 13, and is not additionally named as a third circulation fan herein.
Example 2
As shown in fig. 2, the arrangement positions of the smoke hoods are the same as that of embodiment 1, smoke of a first section of smoke hood with the first high temperature is introduced into a high-temperature smoke inlet 9 of the double-pressure waste heat boiler through a first smoke pipeline 17, smoke of a second section of smoke hood with the second high temperature is introduced into a low-temperature smoke inlet 10 of the double-pressure waste heat boiler through a second smoke pipeline 18, and the cooled smoke is correspondingly blown into the sintering circular cooler 1 through two first circulating fans 12 through a third smoke pipeline 19 to realize hot air circulation; introducing the flue gas of the three-section smoke hood with the third highest temperature into the single-pressure waste heat boiler 5 through a fourth flue gas pipeline 20, and blowing the cooled flue gas into the sintering circular cooler 1 through an eighth flue gas pipeline 26 by a second circulating fan 13 to realize hot air circulation; introducing flue gas of a fourth section of a fourth highest-temperature smoke hood into the hot water boiler 6 through a fifth flue gas pipeline 22, and blowing the cooled flue gas into the sintering circular cooler 1 through a sixth flue gas pipeline 23 by a second circulating fan 13 to realize hot air circulation; and (3) blowing the flue gas of the five-section smoke hood with the lowest temperature into the sintering circular cooler 1 through a seventh flue gas pipeline 24 by a second circulating fan 13 to realize hot air circulation.
Example 3
As shown in fig. 3, the arrangement positions of the respective hoods are the same as those of embodiment 1, wherein: introducing flue gas of a first section of smoke hood with the first high temperature into a high-temperature flue gas inlet 9 of the double-pressure waste heat boiler through a first flue gas pipeline 17, introducing flue gas of a second section of smoke hood with the second high temperature into a low-temperature flue gas inlet 10 of the double-pressure waste heat boiler through a second flue gas pipeline 18, and correspondingly blowing the cooled flue gas into the sintering ring cooler 1 through two first circulating fans 12 through a third flue gas pipeline 19 to realize hot air circulation; introducing the flue gas of the three-section smoke hood with the third highest temperature into the single-pressure waste heat boiler 5 through a fourth flue gas pipeline 20, and blowing the cooled flue gas into the sintering circular cooler 1 through an eighth flue gas pipeline 26 by a second circulating fan 13 to realize hot air circulation; introducing flue gas of a fourth-section smoke hood with the fourth highest temperature into a hot water boiler 6 through a fifth flue gas pipeline 22, and introducing the cooled flue gas into a sintering machine through a sixth flue gas pipeline 23 for hot air sintering; and the smoke of the five-section smoke hood with the lowest temperature is blown into the sintering circular cooler 1 through a seventh smoke pipeline 24 by the second circulating fan 13 to realize hot air circulation, and the connected cooling gas introduction channel 3 is communicated with the second air blower 25 and blows air into the sintering circular cooler 1 through the second air blower 25.
Example 4
As shown in fig. 4, the arrangement positions of the respective hoods are the same as those of embodiment 1, wherein: introducing flue gas of a first section of high-temperature flue gas hood into a high-temperature flue gas inlet 9 of the double-pressure waste heat boiler through a first flue gas pipeline 17, introducing flue gas of a second section of high-temperature flue gas hood into a low-temperature flue gas inlet 10 of the double-pressure waste heat boiler through a second flue gas pipeline 18, and correspondingly blowing the cooled flue gas into a first high-temperature section 7 and a second high-temperature section 8 of the sintering ring cooler 1 through a third flue gas pipeline 19 by a first circulating fan 12 to realize hot air circulation; introducing the flue gas of the third-section smoke hood with the third highest temperature into the single-pressure waste heat boiler 5 through a fourth flue gas pipeline 20, and introducing the cooled flue gas into a sintering machine through an eighth flue gas pipeline 26 for hot air sintering; introducing the flue gas of the fourth section of the smoke hood with the fourth highest temperature into the hot water boiler 6 through a fifth flue gas pipeline 22, and blowing the cooled flue gas into the sintering circular cooler 1 through a sixth flue gas pipeline 23 by a second circulating fan 13 to realize hot air circulation; and the smoke of the five-section smoke hood with the lowest temperature is blown into the sintering circular cooler 1 through a seventh smoke pipeline 24 by the second circulating fan 13 to realize hot air circulation, and the connected cooling gas introduction channel 3 is communicated with the second air blower 25 and blows air into the sintering circular cooler 1 through the second air blower 25.
Example 5
As shown in fig. 5, the arrangement positions of the respective hoods are the same as those of embodiment 1, wherein: introducing the flue gas of the first section of smoke hood with the first high temperature into a high-temperature flue gas inlet 9 of the double-pressure waste heat boiler through a first flue gas pipeline 17, introducing the flue gas of the second section of smoke hood with the second high temperature into a low-temperature flue gas inlet 10 of the double-pressure waste heat boiler through a second flue gas pipeline 18, and correspondingly blowing the cooled flue gas into a first high-temperature section 7 and a second high-temperature section 8 in the sintering ring cooling machine 1 through a third flue gas pipeline 19 by a first circulating fan 12 to realize hot air circulation; introducing the flue gas of the three-section smoke hood with the third highest temperature into the single-pressure waste heat boiler 5 through a fourth flue gas pipeline 20, and blowing the cooled flue gas into the sintering circular cooler 1 through an eighth flue gas pipeline 26 by a second circulating fan 13 to realize hot air circulation; introducing flue gas of a fourth section of a fourth highest-temperature smoke hood into the hot water boiler 6 through a fifth flue gas pipeline 22, and blowing the cooled flue gas into the sintering circular cooler 1 through a sixth flue gas pipeline 23 by a second circulating fan 13 to realize hot air circulation; and (3) blowing the flue gas of the five-section smoke hood with the lowest temperature into the sintering circular cooler 1 through a seventh flue gas pipeline 24 by a second circulating fan 23 to realize hot air circulation.
The utility model discloses it has following beneficial effect further to have confirmed based on above-mentioned embodiment:
1) Through the hot air circulation mode of different forms, can further promote the flue gas temperature of sintering circular cooler 1, improve waste heat resource taste.
2) Through hot air circulation modes in different forms, the sintering circular cooler can realize no waste gas emission.
3) Through the arrangement of a plurality of different flue gas pipelines, the flue gas waste heat at different positions is supplied to different scenes according to different tastes of the flue gas waste heat, so that the cascade utilization of the flue gas waste heat can be realized, and the energy utilization efficiency is greatly improved by 15794.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. A grading recovery cooling device for a sintering production line comprises a sintering circular cooler (1) which is sequentially provided with a plurality of cooling sections with sequentially reduced temperature along the extension direction, and is characterized in that each cooling section is respectively connected with a flue gas outlet channel (2) and a cooling gas inlet channel (3); wherein,
the flue gas guide-out channel (2) on each cooling section is respectively connected with a flue gas waste heat treatment unit, and the requirements of the plurality of flue gas waste heat treatment units on the taste of waste heat are sequentially reduced;
each cooling gas introduction channel (3) is communicated with a cooling gas supply unit, and the cooling gas supply unit is derived from at least one of flue gas and cooling air treated by the flue gas waste heat treatment unit and a flue gas outlet channel (2) in the cooling section of the cooling section rear section corresponding to the cooling gas introduction channel (3).
2. The staged recovery cooling device for a sintering line according to claim 1, wherein at least the flue gas outlet channel (2) is used for directly or indirectly supplying flue gas to the sintering machine.
3. The staged recovery cooling device for a sintering production line as recited in claim 1 or 2, wherein the cooling section comprises at least a high temperature cooling section, a medium temperature cooling section (16) and a low temperature cooling section which are arranged in sequence; and,
the flue gas waste heat treatment unit communicated with the high-temperature cooling section comprises a multi-pressure waste heat boiler (4);
the smoke waste heat treatment unit communicated with the medium temperature cooling section (16) comprises a single-pressure waste heat boiler (5);
the smoke waste heat treatment unit communicated with the low-temperature cooling section comprises a hot water boiler (6).
4. The staged recovery cooling device for the sintering production line as claimed in claim 3, wherein the high-temperature cooling section at least comprises a first high-temperature section (7) and a second high-temperature section (8) which are sequentially arranged, and the multi-pressure waste heat boiler (4) at least comprises a high-temperature flue gas inlet (9), a low-temperature flue gas inlet (10) and a flue gas outlet (11); wherein,
the flue gas of first high temperature section (7) derive passageway (2) with high temperature flue gas import (9) intercommunication, second high temperature section (8) the flue gas derive passageway (2) with low temperature flue gas import (10) intercommunication, exhanst gas outlet (11) and at least part cooling gas channel (3) are linked together.
5. A staged recovery cooling device for a sintering line according to claim 4, wherein said flue gas outlet (11) is in communication with said cooling gas introduction passages (3) of said first high temperature section (7) and said second high temperature section (8) respectively by means of a first circulating fan (12).
6. The staged recovery cooling device for sintering production line according to claim 3, wherein the flue gas outlet channel (2) of the intermediate temperature cooling section (16) is communicated with the flue gas inlet of the single-pressure waste heat boiler (5), and the flue gas outlet of the single-pressure waste heat boiler (5) is communicated with the cooling gas inlet channel (3) of the intermediate temperature cooling section (16) and/or the low temperature cooling section through a second circulating fan (13).
7. The staged recovery cooling device for sintering line according to claim 3, wherein said low-temperature cooling section comprises at least a first low-temperature section (14) and a second low-temperature section (15) arranged in sequence, and said flue gas guiding out passage (2) of said first low-temperature section (14) is communicated with said hot water boiler (6).
8. A staged recovery cooling device for a sintering line according to claim 7, wherein the flue gas outlet channel (2) of the second low temperature section (15) is in communication with at least one of the cooling gas inlet channel (3) of the high temperature cooling section, the medium temperature cooling section (16) and the first low temperature section (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222511457.1U CN218120654U (en) | 2022-09-21 | 2022-09-21 | Sintering production line is with hierarchical recovery cooling device |
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| CN202222511457.1U CN218120654U (en) | 2022-09-21 | 2022-09-21 | Sintering production line is with hierarchical recovery cooling device |
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