CN210663973U - Comprehensive utilization device for blast furnace gas - Google Patents
Comprehensive utilization device for blast furnace gas Download PDFInfo
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- CN210663973U CN210663973U CN201921862501.5U CN201921862501U CN210663973U CN 210663973 U CN210663973 U CN 210663973U CN 201921862501 U CN201921862501 U CN 201921862501U CN 210663973 U CN210663973 U CN 210663973U
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- blast furnace
- waste heat
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- preheating chamber
- furnace gas
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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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Abstract
The utility model discloses a blast furnace gas comprehensive utilization device, which comprises an oxygen generating mechanism, a combustor communicated with a blast furnace, a preheating chamber connected between the combustor and the oxygen generating mechanism, and a waste heat recovery mechanism connected between a blast furnace smoke outlet and the preheating chamber; the waste heat recovery mechanism comprises a waste heat collecting chamber arranged between the preheating chamber and the blast furnace, inner containers respectively arranged in the waste heat collecting chamber, and a heat storage cavity connected to the lower ends of the inner containers, the heat storage cavity is communicated with the preheating chamber, and the inner containers are connected with a dust removal assembly; the waste heat of the flue gas that produces the blast furnace through waste heat recovery mechanism is sent into to the preheating chamber, realizes the recycle to the waste heat, improves the utilization ratio of flue gas waste heat, and mixes flue gas waste heat and the oxygen of sending into to preheating chamber, carries out preheating treatment to oxygen, and then guarantees that the oxygen that enters into in the combustor has certain heat, reduces energy resource consumption, the effectual economic cost that has reduced.
Description
Technical Field
The utility model relates to a blast furnace gas reason technical field, concretely relates to comprehensive utilization device of blast furnace gas.
Background
Blast furnace gas is a combustible gas by-produced in the blast furnace iron-making production process, and the component of the blast furnace gas contains about 30% of CO, so the blast furnace gas is also a gas fuel with low calorific value. In order to obtain the economic value of the heat value of CO in blast furnace gas, the blast furnace gas can be used as self-use gas of metallurgical enterprises, such as hot rolled steel ingots, preheated ladles and the like. However, in practical use, because the heat value of CO in blast furnace gas is low, direct combustion has certain difficulty, therefore, the concentration of CO needs to be improved by a certain technical means to about 65-70 percent generally, and the heat value of the blast furnace gas is about 1800-2200 kcal/Nm 3 at the moment, so that the blast furnace gas can be conveniently combusted by subsequent combustion equipment.
At present, the separation and purification of CO from blast furnace gas mainly adopts a pressure swing adsorption method, and the general flow relates to the procedures of raw gas pressure rising, desulfurization and refining, deoxidation, CO adsorption, CO vacuum extraction, CO gas pressurization and delivery and the like. With the application of the pressure swing adsorption method in the process of concentrating blast furnace gas CO, we find that although the pressure swing adsorption method can be used for preparing CO fuel with high heat value and realizing the reutilization of the blast furnace gas, in the practical application process, the capacity of recovering the CO heat value is low, and the efficiency of recovering and utilizing waste heat is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a comprehensive utilization device of blast furnace gas to solve the problem that current CO calorific value ability is low, waste heat recovery utilizes the effect poor.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a blast furnace gas comprehensive utilization device comprises an oxygen generation mechanism, a combustor communicated with a blast furnace, a preheating chamber connected between the combustor and the oxygen generation mechanism, and a waste heat recovery mechanism connected between a blast furnace smoke outlet and the preheating chamber;
the waste heat recovery mechanism comprises a waste heat collecting chamber arranged between the preheating chamber and the blast furnace, an inner container respectively arranged in the waste heat collecting chamber, and a heat storage cavity connected to the lower end of the inner container, the heat storage cavity is communicated with the preheating chamber, and a dust removal assembly is connected to the inner container.
Further, the oxygen generating mechanism comprises an oxygen generator, an oxygen-enriched pipe connected to the oxygen generator and an oxygen-enriched nozzle connected to the end part of the oxygen-enriched pipe, and the oxygen-enriched nozzle is located in the preheating chamber.
Furthermore, the dust removal assembly comprises a dust removal pipe communicated with the inner container and a dust removal recovery cooler connected to the dust removal pipe.
Furthermore, a filtering membrane is arranged between the inner container and the heat storage cavity.
Further, the diameter of the bottom end of the inner container is smaller than that of the top end of the inner container.
Further, the inner wall of the preheating chamber is coated with an insulating layer.
The utility model discloses following beneficial effect has: the utility model provides a comprehensive utilization device of blast furnace gas sends flue gas waste heat (CO) that the blast furnace produced into the preheating chamber through waste heat recovery mechanism, realizes the recycle to the waste heat, improves the utilization ratio of flue gas waste heat, and mixes flue gas waste heat and the oxygen of sending into to the preheating chamber, carries out the preheating treatment to oxygen, and then guarantees that the oxygen that enters into the combustor has certain heat, reduces energy consumption, has effectually reduced economic cost; through two oxygen boosting pipelines of system oxygen mechanism, both realized the direct oxygen suppliment to the combustor, realize the oxygen suppliment to the preheating chamber again, improve the combustion effect to the interior material of combustor, performance is high, and is further, blocks through filtration membrane and dust removal subassembly and clears away the solid particle in to the flue gas, avoids sneaking into to preheating the indoor influence oxygen and preheats, sneaks into through oxygen and carries out abundant burning in the effectual combustor that has improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
the reference numerals shown in fig. 1 are respectively denoted as: 1-oxygen making mechanism, 2-burner, 3-preheating chamber, 4-waste heat recovery mechanism, 30-waste heat collecting chamber, 31-inner container, 32-heat storage chamber, 33-dust removing component, 10-oxygen making machine, 11-oxygen enrichment pipe, 330-dust removing pipe and 331-dust removing recovery cooler.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in FIG. 1, the comprehensive utilization device of blast furnace gas comprises an oxygen generating mechanism 1, a combustor 2 communicated with a blast furnace, a preheating chamber 3 connected between the combustor 2 and the oxygen generating mechanism 1, and a waste heat recovery mechanism 4 connected between a blast furnace smoke outlet and the preheating chamber 3.
The combustor 2 is used for combusting blast furnace gas and combustion-supporting gas so as to fully utilize the heat value of CO in the blast furnace gas to draw certain economic benefit, and the oxygen generating mechanism 1 is used for passing pure oxygen or mixed combustion gas into the combustor 2, thereby being beneficial to improving the completeness of the combustion of the blast furnace gas. The waste heat recovery mechanism 4 is used for recovering the flue gas waste heat after the combustion of the blast furnace and conveying the flue gas waste heat to the preheating chamber 3, and carrying out preheating treatment on pure oxygen in the preheating chamber 3, so that the gas entering the combustor 2 has certain heat, thereby not only improving the combustion efficiency, but also reducing the energy consumption, effectively utilizing the heat after the combustion of the blast furnace gas, and reducing the economic cost.
The waste heat recovery mechanism 4 comprises a waste heat collecting chamber 30 arranged between the preheating chamber 3 and the blast furnace, an inner container 31 respectively arranged in the waste heat collecting chamber 30 and a heat storage cavity 32 connected to the lower end of the inner container 31, the heat storage cavity 32 is communicated with the preheating chamber 3, and the inner container 31 is connected with a dust removal assembly 33. Flue gas that the blast furnace produced enters into inner bag 31 in the waste heat collecting chamber 30 through the pipeline, carries out the heat and temporarily stores up, and then conveys in the heat storage chamber 32 of inner bag 31 lower extreme, and in the during operation, the heat in the heat storage chamber 32 gets into preheating chamber 3, mixes with the oxygen in preheating chamber 3, carries out the preheating of certain degree to oxygen to guarantee that the oxygen that enters into combustor 2 has the heat, helps reducing energy consumption. Blocking is conducted on solid particles mixed in the flue gas through the dust removal assembly 33, the problem that the gas mixing purity and effect are affected due to the fact that solid impurity particles enter the preheating chamber 3 along with the waste heat of the flue gas is avoided, and pollution to the surrounding environment is effectively avoided through the dust removal assembly 33.
In order to improve the effect of letting in oxygen in the preheating chamber 3, the utility model discloses in, oxygenerator 1 includes oxygenerator 10, connects oxygen-enriched pipe 11 on oxygenerator 10 and connects the oxygen boosting shower nozzle at the oxygen-enriched pipe 11 tip, and the oxygen boosting shower nozzle is located preheating chamber 3. The oxygen generator 10 produces oxygen and conveys the oxygen to the preheating chamber 3 through the oxygen-enriched pipe 11, wherein the oxygen entering the preheating chamber 3 generates certain pressure through the oxygen-enriched nozzle at the end part, thereby improving the oxygen introducing efficiency and the working efficiency.
In order to improve the effect of treating the harmful substances in the smoke, the dust removing assembly 33 of the present invention comprises a dust removing pipe 330 communicated with the inner container 31 and a dust removing recycling cooler 331 connected to the dust removing pipe 330. A filtering membrane is arranged between the inner container 31 and the heat storage cavity 32. The solid particle impurities in the smoke dust are blocked by the filtering membrane, and then are conveyed into the dust removal recovery cooler 331 through the dust removal pipe 330 for the treatment of harmful substances. The dust-removing recovery cooler 331 may be replaced with a desulfurization apparatus or other processing apparatus according to actual working requirements.
In order to improve the efficiency of hot gas entering the preheating chamber 3, the utility model discloses in, the bottom diameter of inner bag 31 is less than inner bag 31 top diameter. The whole inner bag 31 roughly is hopper-shaped structure, and the flue gas waste heat is held the entering by the macrostoma, is discharged by the osculum, improves the rate of passing through of flue gas waste heat, and then improves flue gas circulation efficiency.
In order to improve the heat-retaining effect in the preheating chamber 3, the utility model discloses in, the coating of 3 inner walls in preheating chamber has the heat preservation. Carry out certain storage through the heat preservation to the heat in the preheating chamber 3, for providing lasting heat in the preheating chamber 3, help reducing enterprise economic cost, reduce energy consumption.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. The blast furnace gas comprehensive utilization device is characterized by comprising an oxygen generation mechanism (1), a combustor (2) communicated with a blast furnace, a preheating chamber (3) connected between the combustor (2) and the oxygen generation mechanism (1), and a waste heat recovery mechanism (4) connected between a blast furnace smoke outlet and the preheating chamber (3);
the waste heat recovery mechanism (4) comprises a waste heat collecting chamber (30) arranged between the preheating chamber (3) and the blast furnace, a liner (31) arranged in the waste heat collecting chamber (30) and a heat storage cavity (32) connected to the lower end of the liner (31), the heat storage cavity (32) is communicated with the preheating chamber (3), and a dust removal assembly (33) is connected to the liner (31).
2. The comprehensive utilization device of blast furnace gas according to claim 1, wherein the oxygen generation mechanism (1) comprises an oxygen generator (10), an oxygen enrichment pipe (11) connected to the oxygen generator (10), and an oxygen enrichment nozzle connected to the end of the oxygen enrichment pipe (11), and the oxygen enrichment nozzle is located in the preheating chamber (3).
3. The comprehensive utilization device of blast furnace gas according to claim 1, wherein the dust removal assembly (33) comprises a dust removal pipe (330) communicated with the inner container (31) and a dust removal recovery cooler (331) connected to the dust removal pipe (330).
4. The comprehensive utilization device of blast furnace gas according to any one of claims 1 to 3, characterized in that a filter membrane is arranged between the inner container (31) and the heat storage chamber (32).
5. The comprehensive utilization device of blast furnace gas according to claim 4, characterized in that the diameter of the bottom end of the inner container (31) is smaller than the diameter of the top end of the inner container (31).
6. The comprehensive utilization device of blast furnace gas according to claim 5, characterized in that the inner wall of the preheating chamber (3) is coated with an insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921862501.5U CN210663973U (en) | 2019-10-31 | 2019-10-31 | Comprehensive utilization device for blast furnace gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921862501.5U CN210663973U (en) | 2019-10-31 | 2019-10-31 | Comprehensive utilization device for blast furnace gas |
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| CN210663973U true CN210663973U (en) | 2020-06-02 |
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| CN201921862501.5U Active CN210663973U (en) | 2019-10-31 | 2019-10-31 | Comprehensive utilization device for blast furnace gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284147A (en) * | 2020-10-29 | 2021-01-29 | 重庆迅华环境技术有限公司 | High-temperature preheating type oxygen-enriched combustion energy-saving emission-reducing system of sand regenerating furnace for casting |
-
2019
- 2019-10-31 CN CN201921862501.5U patent/CN210663973U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284147A (en) * | 2020-10-29 | 2021-01-29 | 重庆迅华环境技术有限公司 | High-temperature preheating type oxygen-enriched combustion energy-saving emission-reducing system of sand regenerating furnace for casting |
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