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CN120055277A - Acid regeneration byproduct reduction system and reduction method - Google Patents

Acid regeneration byproduct reduction system and reduction method Download PDF

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Publication number
CN120055277A
CN120055277A CN202510254294.9A CN202510254294A CN120055277A CN 120055277 A CN120055277 A CN 120055277A CN 202510254294 A CN202510254294 A CN 202510254294A CN 120055277 A CN120055277 A CN 120055277A
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China
Prior art keywords
coke oven
gas
oven gas
iron oxide
reduction
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Chinese (zh)
Inventor
高建勋
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WUXI LONGSHAN TECHNOLOGY CO LTD
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WUXI LONGSHAN TECHNOLOGY CO LTD
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Priority to CN202510254294.9A priority Critical patent/CN120055277A/en
Publication of CN120055277A publication Critical patent/CN120055277A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/36—Regeneration of waste pickling liquors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F2009/001—Making metallic powder or suspensions thereof from scrap particles

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)

Abstract

本发明公开了一种酸再生副产品还原系统及还原方法。包括焦炉煤气重整模块、氧化铁砂还原模块、酸再生炉模块；所述焦炉煤气重整模块包括焦炉煤气总管、预热器和裂解器，焦炉煤气总管与预热器连接，焦炉煤气总管为预热器提供待加热的焦炉煤气和燃烧的焦炉煤气，预热器与裂解器连接，裂解器用于将氧气和预热的焦炉煤气进行裂解得到还原气体；所述酸再生炉模块包括酸再生炉、燃烧器和氧化铁砂下料道，酸再生炉上设置有燃烧器、氧化铁砂下料道，燃烧器与焦炉煤气总管连接；所述氧化铁砂还原模块包括还原段、冷却段，还原段位于冷却段上部，还原段分别与裂解器、氧化铁砂下料道和燃烧器连接连接，还原段用于将氧化铁砂在还原气氛下还原成铁粉，并将废气排放至燃烧器，冷却段用于冷却铁粉。本发明具有设备简单、低耗能、低成本、高效益、无污染和全回收的优势，极大地提升酸再生系统的经济效益，增加了氧化铁砂还原功能的酸再生系统具有更大的市场竞争能力。

The invention discloses an acid regeneration byproduct reduction system and reduction method. The system comprises a coke oven gas reforming module, an iron oxide sand reduction module and an acid regeneration furnace module; the coke oven gas reforming module comprises a coke oven gas main pipe, a preheater and a cracker, the coke oven gas main pipe is connected to the preheater, the coke oven gas main pipe provides the preheater with coke oven gas to be heated and the coke oven gas to be burned, the preheater is connected to the cracker, the cracker is used to crack oxygen and the preheated coke oven gas to obtain reducing gas; the acid regeneration furnace module comprises an acid regeneration furnace, a burner and an iron oxide sand feed channel, the acid regeneration furnace is provided with a burner and an iron oxide sand feed channel, and the burner is connected to the coke oven gas main pipe; the iron oxide sand reduction module comprises a reduction section and a cooling section, the reduction section is located at the upper part of the cooling section, the reduction section is respectively connected to the cracker, the iron oxide sand feed channel and the burner, the reduction section is used to reduce the iron oxide sand into iron powder under a reducing atmosphere, and discharge the waste gas to the burner, and the cooling section is used to cool the iron powder. The invention has the advantages of simple equipment, low energy consumption, low cost, high efficiency, no pollution and full recovery, which greatly improves the economic benefits of the acid regeneration system. The acid regeneration system with increased iron oxide sand reduction function has greater market competitiveness.

Description

Acid regeneration byproduct reduction system and reduction method
Technical field:
The invention belongs to the technical field of acid regeneration systems, and particularly relates to a method for reducing byproduct iron oxide sand of an acid regeneration fluidized bed into high-purity iron powder.
The background technology is as follows:
At present, a plurality of domestic iron and steel enterprises need to use an acid washing process during production, and the used waste acid can be regenerated into new acid through an acid regeneration fluidized bed process for reuse, so that the purposes of environmental protection and cost saving are achieved. However, in the acid regeneration fluidized bed process, while the waste acid is regenerated, ferric oxide in the waste acid is precipitated and is discharged from the lower part of the fluidized bed, the temperature of the discharged ferric oxide sand is about 900 ℃, the heat of the discharged ferric oxide sand accounts for nearly half of the heat consumption of the acid regeneration fluidized bed, and the ferric oxide sand can only be generally used as a raw material of a permanent magnet and the like at present, and has low value, limited market capacity and low value and even becomes a solid waste which is difficult to treat.
However, at the same time, the content of impurities in the iron oxide sand is very small, the content of iron oxide is up to more than 99%, if the iron oxide sand can be reduced into high-purity iron powder, the content of pure iron can be up to more than 99%, and the iron oxide sand can be completely used as the high-purity iron powder, and the value of the iron oxide sand can be improved by several times.
The acid regeneration system is generally attached to steel enterprises, and mostly uses coke oven gas as fuel, how to utilize byproduct iron oxide sand of an acid regeneration furnace and heat brought by the iron oxide sand, and reform the coke oven gas nearby, mix and crack the coke oven gas and oxygen to generate reducing gas, reduce the iron oxide sand into high-purity iron powder with less energy consumption, and form a novel acid regeneration system with short flow, low energy consumption, high efficiency and complete recovery is a problem to be solved.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
The invention comprises the following steps:
The present invention aims to provide a system and a method for reducing acid regeneration byproducts, which overcome the defects in the prior art.
The acid regeneration byproduct reduction system comprises a coke oven gas reforming module, an iron oxide sand reduction module and an acid regeneration furnace module, wherein the coke oven gas reforming module is respectively connected with the iron oxide sand reduction module and the acid regeneration furnace module, the acid regeneration furnace module is connected with the iron oxide sand reduction module, the coke oven gas reforming module comprises a coke oven gas main pipe, a preheater and a cracker, the coke oven gas main pipe is connected with the preheater, the coke oven gas main pipe is used for providing coke oven gas to be heated and combusted coke oven gas for the preheater, the preheater is connected with a cracker, the cracker is used for cracking oxygen and the preheated coke oven gas to obtain reducing gas, the acid regeneration furnace module comprises an acid regeneration furnace, a combustor and an iron oxide sand blanking channel, the acid regeneration furnace is provided with the combustor and the iron oxide sand blanking channel, the combustor is connected with the coke oven gas main pipe, the iron oxide sand reduction module comprises a reduction section and a cooling section, the reduction section is positioned at the upper part of the cooling section, and is respectively connected with the cracker, the iron oxide sand blanking channel and the combustor, the reduction section is used for reducing iron oxide sand under the reducing atmosphere and discharging the reducing iron powder to the cooling section.
The coke oven gas reforming module comprises a coke oven gas main pipe, a preheater, a cracker, a preheating air inlet pipeline and a gas pipeline, wherein the preheater is provided with an air inlet, a gas port and an air outlet, the air inlet is connected with the coke oven gas main pipe through the preheating air inlet pipeline, the gas port is connected with the coke oven gas main pipe through the gas pipeline, the preheating air inlet pipeline is connected with the gas pipeline in parallel, the cracker is provided with a coke oven gas inlet, an oxygen inlet and a reducing gas outlet, the coke oven gas inlet is connected with the air outlet of the preheater through the pipeline, and the oxygen pipeline is connected with the oxygen inlet.
Preferably, in the technical scheme, a main pipe valve group is arranged on a coke oven gas main pipe, and flow regulating valves are arranged on a preheating air inlet pipeline and a fuel gas pipeline.
In the technical scheme, the iron oxide sand reduction module comprises a reduction section, a cooling section, an iron oxide sand inlet, a reduction gas inlet, a tail gas outlet, a cooling liquid inlet and a cooling liquid outlet, wherein the reduction section is provided with the iron oxide sand inlet, the reduction gas inlet and the tail gas outlet, the iron oxide sand inlet is connected with an iron oxide sand discharging channel, the reduction gas inlet is connected with the reduction gas outlet of the cracker, the tail gas outlet is connected with the burner, and the cooling section is provided with the cooling liquid inlet and the cooling liquid outlet.
Preferably, in the technical scheme, the reducing gas inlet is connected with an external reducing gas pipeline, and the reducing gas generated by cracking the coke oven gas reforming module is replaced by external other reducing gas.
Preferably, in the technical scheme, an insulating layer is arranged in the reduction section, so that the iron oxide sand is kept at a sufficient temperature in the reduction process.
Preferably, in the technical scheme, the connection sequence of the preheater and the cracker is exchanged, the cracker is connected with the coke oven gas main pipe through the coke oven gas inlet, the reducing gas outlet of the cracker is connected with the gas inlet of the preheater, the gas outlet of the preheater is connected with the reducing gas inlet of the reducing section, the coke oven gas and the oxygen are mixed in the cracker, and the cracking reaction is carried out in the preheater.
Preferably, in the technical scheme, the acid regeneration byproduct reduction system further comprises a vacuum packaging machine, wherein the vacuum packaging machine is connected with the outlet of the cooling section, and the vacuum packaging machine is arranged in the protective gas atmosphere.
The acid regeneration byproduct reduction method comprises (1) introducing coke oven gas into a preheater via a main pipe of the coke oven gas, igniting and heating the preheater by using a part of the coke oven gas as fuel gas, heating the other part of the coke oven gas to 400 ℃ or so as to be heated by using the other part of the coke oven gas as gas to be heated, and then sending the coke oven gas from the preheater to a cracker;
(2) The coke oven gas entering the cracker is mixed with oxygen entering the cracker at the same time to carry out a cracking reaction, alkane and alkene gases in the coke oven gas are cracked into reducing gases taking hydrogen and carbon monoxide gases as main bodies, the reducing gases are continuously heated to about 900 ℃ by reaction heat generated during the cracking reaction, and the cracked reducing gases are conveyed from the cracker to a reduction section;
(3) The coke oven gas main pipe conveys coke oven gas to a combustor of the acid regenerating furnace as fuel gas, the mixed air of the coke oven gas in the combustor is combusted, iron oxide sand is generated in the acid regenerating furnace in the acid regenerating process, and the iron oxide sand at about 900 ℃ enters a reduction section through an iron oxide sand discharging channel;
(4) The reducing gas is fully contacted with the iron oxide sand from bottom to top continuously in the reducing section, the iron oxide sand is reduced into iron powder by the reducing gas at the high temperature of about 900 ℃, and the iron oxide sand is completely reduced into high-purity iron powder at the outlet of the reducing section;
(5) The high-purity iron powder enters a cooling section to exchange heat with cooling liquid, and is cooled to below 85 ℃ and enters a subsequent treatment;
(6) And outputting the high-purity iron powder from the cooling section, and then, feeding the high-purity iron powder into a vacuumizing packaging machine, and vacuumizing and packaging in a protective atmosphere.
Compared with the prior art, the invention has the following beneficial effects:
the iron oxide sand with low original value and narrow application range is reduced into high-purity iron powder with wider application and higher value, the iron oxide sand in the domestic market has the selling price of about 1200 yuan/ton at present, and the selling price of the high-purity iron powder with more than 99 percent of iron content is up to 5000-6000 yuan/ton. Because the temperature of the iron oxide sand discharged from the acid regenerating furnace is about 900 ℃, the temperature is just the temperature range required by reduction, the heat required by the supplement of the reduction reaction is little, the nearby coke oven gas main pipe can be utilized for gas supply, the reduced tail gas also contains about half of the heat value and higher sensible heat, and the tail gas is completely sent to the acid regenerating furnace burner for utilization. The invention has the advantages of simple equipment, low energy consumption, low cost, high benefit, no pollution and full recovery, greatly improves the economic benefit of the acid regeneration system, and increases the market competitiveness of the acid regeneration system with the iron oxide sand reduction function.
Description of the drawings:
FIG. 1 is a schematic diagram of an acid regeneration byproduct reduction system according to the present invention;
FIG. 2 is a flow chart of a method for reducing acid regeneration byproducts of the present invention.
The specific embodiment is as follows:
The following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 1, the acid regeneration byproduct reduction system comprises a coke oven gas reforming module 100, an iron oxide sand reduction module 200, an acid regeneration furnace module 300 and a vacuumizing packaging machine 400, wherein the coke oven gas reforming module 100 is respectively connected with the iron oxide sand reduction module 200 and the acid regeneration furnace module 300, and the acid regeneration furnace module 300 is connected with the iron oxide sand reduction module 200;
The coke oven gas reforming module 100 comprises a coke oven gas main pipe 1, a preheater 2, a cracker 3, a preheating air inlet pipeline 4 and a gas pipeline 5, wherein the preheater 2 is internally divided into a combustion zone 26 and a preheating zone 27, a gas inlet 7 and a gas outlet 8 are arranged on the combustion zone 26, the preheating zone 27 is provided with an air inlet 6 and a gas outlet 8, the air inlet 6 is connected with the coke oven gas main pipe 1 through the preheating air inlet pipeline 4, the gas inlet 7 is connected with the coke oven gas main pipe 1 through the gas pipeline 5, the preheating air inlet pipeline 4 is connected with the gas pipeline 5 in parallel, the waste gas generated in the preheater 2 is discharged through the gas outlet 25, the cracker 3 is provided with a coke oven gas inlet 9, an oxygen inlet 10 and a reducing gas outlet 11, the coke oven gas inlet 9 is connected with a gas outlet 8 of the preheater 2 through pipelines, the oxygen pipeline is connected with the oxygen inlet 10, the coke oven gas main pipe 1 is provided with a main pipe valve set 12, the preheating air inlet pipeline flow regulating valve 13 is arranged on the preheating air inlet pipeline 4, and the gas pipeline 5 is provided with a gas pipeline flow regulating valve 14;
The acid regenerating oven module 300 comprises an acid regenerating oven 15, a burner 16 and an iron oxide sand discharging channel 17, wherein the burner 16 and the iron oxide sand discharging channel 17 are arranged on the acid regenerating oven 15, and the burner 16 is connected with the coke oven gas main pipe 1;
The iron oxide sand reduction module 200 comprises a reduction section 18, a cooling section 19, an iron oxide sand inlet 20, a reducing gas inlet 21, a tail gas outlet 22, a cooling liquid inlet 23 and a cooling liquid outlet 24, wherein the reduction section 18 is provided with the iron oxide sand inlet 20, the reducing gas inlet 21 and the tail gas outlet 22, the iron oxide sand inlet 20 is connected with an iron oxide sand discharging channel 17, the reducing gas inlet 21 is connected with a reducing gas outlet 11 of a cracker 3, the tail gas outlet 22 is connected with a combustor 16, the iron oxide sand inlet 20 and the tail gas outlet 22 are positioned at the upper part of the reduction section 18, the reducing gas inlet 21 is positioned at the lower part of the reduction section 18, the cooling section 19 is connected with the reduction section 18, the cooling section 19 is provided with the cooling liquid inlet 23 and the cooling liquid outlet 24, and a heat preservation layer is arranged in the reduction section 18, so that the iron oxide sand keeps enough temperature in the reduction process;
the reducing gas inlet 21 is connected with an external reducing gas pipeline, and can replace reducing gas generated by cracking of the coke oven gas reforming module by external other reducing gas.
The connection sequence of the preheater 2 and the cracker 3 is exchanged, the cracker 3 is connected with the coke oven gas main pipe 1 through the coke oven gas inlet 9, the reducing gas outlet 11 of the cracker 3 is connected with the gas inlet 6 of the preheater 2, the gas outlet 8 of the preheater 2 is connected with the reducing gas inlet 21 of the reducing section 18, the coke oven gas and the oxygen are mixed in the cracker 3, and the cracking reaction is carried out in the preheater 2.
As shown in figure 2, the method comprises the steps that (1) coke oven gas enters a preheating air inlet pipeline 4 and a gas pipeline 5 respectively through a coke oven gas main pipe 1, the coke oven gas in the gas pipeline 5 enters a combustion zone 26 through a gas port 7 to be used as a preheating zone 27 in a gas ignition heating preheater 2, waste gas generated by combustion is discharged through a waste gas port 25, the coke oven gas in the preheating air inlet pipeline 4 enters the preheating zone 27 through a gas inlet 6 to be used as gas to be heated to about 400 ℃, and then is sent into a cracker 3 from a gas outlet 8 through a coke oven gas inlet 9;
(2) The coke oven gas entering the cracker 3 is mixed with oxygen entering the cracker 3 through the oxygen inlet 10 to carry out a cracking reaction, the alkane and alkene gases in the coke oven gas are cracked into reducing gas taking hydrogen and carbon monoxide gas as main bodies, the reducing gas is continuously heated to about 900 ℃ by the reaction heat generated during the cracking reaction, and the cracked reducing gas is conveyed into the reduction section 18 from the reducing gas outlet 11 through the reducing gas inlet 21, wherein the specific reaction formula of the coke oven gas and the oxygen in the cracker 3 is as follows:
CH4+0.5O2＝CO+2H2;
C2H4+O2＝2CO+2H2;
C2H6+O2＝2CO+3H2;
(3) The coke oven gas main pipe 1 conveys coke oven gas to a combustor 16 of the acid regenerating furnace 15 as fuel gas, the mixed air of the coke oven gas in the combustor 16 is combusted, iron oxide sand is generated in the acid regenerating furnace 15 in the acid regenerating process, and the iron oxide sand at about 900 ℃ enters a reduction section 18 through an iron oxide sand discharging channel 17 and an iron oxide sand inlet 20;
(4) After the reducing gas enters the reduction section 18 from the coke oven gas inlet 9 at the lower part of the reduction section 18, the reducing gas is conveyed from bottom to top, the iron oxide sand enters the reduction section 18 from the iron oxide sand inlet 20 at the upper part of the reduction section 18, the iron oxide sand is conveyed from top to bottom, the reducing gas is fully contacted with the iron oxide sand in the reduction section 18, the iron oxide sand is reduced into sponge iron powder by the reducing gas under the high temperature condition of about 900 ℃, the iron oxide sand is fully reduced into sponge high-purity iron powder at the outlet of the reduction section 18, the tail gas after the reaction of the reduction section 18 is conveyed into the combustor 16 through the tail gas outlet 22, the whole enthalpy of the tail gas is utilized, and the specific reaction formula of the reducing gas and the iron oxide sand in the reduction section 18 is as follows:
(5) The high-purity iron powder enters a cooling section 19 to exchange heat with water serving as cooling liquid, and the high-purity iron powder is cooled to below 85 ℃ and enters a vacuumizing packaging machine 400;
(6) The high-purity iron powder is output from the cooling section 19 and then enters the vacuumizing packaging machine 400, vacuumizing packaging is carried out in protective atmosphere, and packaging finished products are output from the outlet of the vacuumizing packaging machine 400.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (9)

1.一种酸再生副产品还原系统，其特征在于：包括焦炉煤气重整模块、氧化铁砂还原模块、酸再生炉模块，所述焦炉煤气重整模块分别与氧化铁砂还原模块、酸再生炉模块连接，所述酸再生炉模块与氧化铁砂还原模块连接；所述焦炉煤气重整模块包括焦炉煤气总管、预热器和裂解器，焦炉煤气总管与预热器连接，焦炉煤气总管为预热器提供待加热的焦炉煤气和燃烧的焦炉煤气，预热器与裂解器连接，裂解器用于将氧气和预热的焦炉煤气进行裂解得到还原气体；所述酸再生炉模块包括酸再生炉、燃烧器和氧化铁砂下料道，酸再生炉上设置有燃烧器、氧化铁砂下料道，燃烧器与焦炉煤气总管连接；所述氧化铁砂还原模块包括还原段、冷却段，还原段位于冷却段上部，还原段分别与裂解器、氧化铁砂下料道和燃烧器连接连接，还原段用于将氧化铁砂在还原气氛下还原成铁粉，并将废气排放至燃烧器，冷却段用于冷却铁粉。1. An acid regeneration byproduct reduction system, characterized in that: it comprises a coke oven gas reforming module, an iron oxide sand reduction module, and an acid regeneration furnace module, wherein the coke oven gas reforming module is connected to the iron oxide sand reduction module and the acid regeneration furnace module respectively, and the acid regeneration furnace module is connected to the iron oxide sand reduction module; the coke oven gas reforming module comprises a coke oven gas main, a preheater, and a cracker, wherein the coke oven gas main is connected to the preheater, the coke oven gas main provides the preheater with coke oven gas to be heated and the coke oven gas to be burned, the preheater is connected to the cracker, and the cracker is connected to the preheater. The invention relates to a method for cracking oxygen and preheated coke oven gas to obtain reducing gas; the acid regeneration furnace module comprises an acid regeneration furnace, a burner and an iron oxide sand feed channel, the acid regeneration furnace is provided with a burner and an iron oxide sand feed channel, and the burner is connected to the coke oven gas main; the iron oxide sand reduction module comprises a reduction section and a cooling section, the reduction section is located at the upper part of the cooling section, the reduction section is respectively connected to the cracker, the iron oxide sand feed channel and the burner, the reduction section is used to reduce the iron oxide sand into iron powder under a reducing atmosphere, and discharge the exhaust gas to the burner, and the cooling section is used to cool the iron powder. 2.根据权利要求1所述的酸再生副产品还原系统，其特征在于：焦炉煤气重整模块包括焦炉煤气总管、预热器、裂解器、预热进气管路、燃气管路；预热器上设置有进气口、燃气口、出气口，进气口与焦炉煤气总管之间通过预热进气管路连接，燃气口与焦炉煤气总管之间通过燃气管路连接，预热进气管路与燃气管路并联；裂解器上设置有焦炉煤气进口、氧气进口、还原气体出口，焦炉煤气进口与预热器的出气口通过管路连接，氧气管路与氧气进口连接。2. The acid regeneration byproduct reduction system according to claim 1 is characterized in that: the coke oven gas reforming module includes a coke oven gas main, a preheater, a cracker, a preheating air inlet pipeline, and a fuel gas pipeline; the preheater is provided with an air inlet, a fuel gas outlet, and a gas outlet; the air inlet is connected to the coke oven gas main through a preheating air inlet pipeline, the gas outlet is connected to the coke oven gas main through a fuel gas pipeline, and the preheating air inlet pipeline is connected to the fuel gas pipeline in parallel; the cracker is provided with a coke oven gas inlet, an oxygen inlet, and a reducing gas outlet, the coke oven gas inlet is connected to the gas outlet of the preheater through a pipeline, and the oxygen pipeline is connected to the oxygen inlet. 3.根据权利要求2所述的酸再生副产品还原系统，其特征在于：焦炉煤气总管上设置有总管阀门组，预热进气管路、燃气管路上均设置有流量调节阀。3. The acid regeneration byproduct reduction system according to claim 2 is characterized in that a main valve group is provided on the coke oven gas main pipe, and flow regulating valves are provided on the preheating air inlet pipeline and the fuel gas pipeline. 4.根据权利要求2所述的酸再生副产品还原系统，其特征在于：氧化铁砂还原模块包括还原段、冷却段、氧化铁砂进口、还原气体进口、尾气出口、冷却液进口、冷却液出口；还原段上设置有氧化铁砂进口、还原气体进口、尾气出口，氧化铁砂进口与氧化铁砂下料道连接，还原气体进口与裂解器的还原气体出口连接，尾气出口与燃烧器连接；冷却段上设置有冷却液进口、冷却液出口。4. The acid regeneration byproduct reduction system according to claim 2 is characterized in that: the iron oxide sand reduction module includes a reduction section, a cooling section, an iron oxide sand inlet, a reducing gas inlet, a tail gas outlet, a coolant inlet, and a coolant outlet; the reduction section is provided with an iron oxide sand inlet, a reducing gas inlet, and a tail gas outlet, the iron oxide sand inlet is connected to the iron oxide sand feed channel, the reducing gas inlet is connected to the reducing gas outlet of the cracker, and the tail gas outlet is connected to the burner; the cooling section is provided with a coolant inlet and a coolant outlet. 5.根据权利要求4所述的酸再生副产品还原系统，其特征在于：还原气体进口与外部还原气体管路连接。5. The acid regeneration byproduct reduction system according to claim 4, characterized in that the reducing gas inlet is connected to an external reducing gas pipeline. 6.根据权利要求4所述的酸再生副产品还原系统，其特征在于：还原段内设置有保温层。6. The acid regeneration byproduct reduction system according to claim 4, characterized in that a heat preservation layer is provided in the reduction section. 7.根据权利要求4所述的酸再生副产品还原系统，其特征在于：预热器与裂解器的连接顺序进行调换，裂解器通过焦炉煤气进口与焦炉煤气总管连接，裂解器的还原气体出口与预热器的进气口连接，预热器的出气口与还原段的还原气体进口连接；焦炉煤气与氧气在裂解器中混合，裂解反应在预热器中进行。7. The acid regeneration byproduct reduction system according to claim 4 is characterized in that: the connection order of the preheater and the cracker is exchanged, the cracker is connected to the coke oven gas main through the coke oven gas inlet, the reducing gas outlet of the cracker is connected to the air inlet of the preheater, and the air outlet of the preheater is connected to the reducing gas inlet of the reduction section; the coke oven gas and oxygen are mixed in the cracker, and the cracking reaction is carried out in the preheater. 8.根据权利要求1所述的酸再生副产品还原系统，其特征在于：酸再生副产品还原系统还包括抽真空包装机，抽真空包装机与冷却段出口连接，抽真空包装机设置在保护气体氛围中。8. The acid regeneration byproduct reduction system according to claim 1 is characterized in that the acid regeneration byproduct reduction system also includes a vacuum packaging machine, which is connected to the outlet of the cooling section and is arranged in a protective gas atmosphere. 9.一种根据权利要求1-8中任意一项所述的酸再生副产品还原系统的还原方法，其步骤为：(1)焦炉煤气经焦炉煤气总管进入预热器，一部分焦炉煤气作为燃气点燃加热预热器，另一部分焦炉煤气作为待加热气体被加热至400℃左右，然后从预热器送入裂解器；9. A reduction method of the acid regeneration byproduct reduction system according to any one of claims 1 to 8, comprising the following steps: (1) coke oven gas enters a preheater through a coke oven gas main, a portion of the coke oven gas is ignited as fuel gas to heat the preheater, and another portion of the coke oven gas is heated to about 400° C. as a gas to be heated, and then is sent from the preheater to a cracker; (2)进入裂解器的焦炉煤气与同时进入裂解器的氧气混合发生裂解反应，将焦炉煤气中的烷烯类气体裂解为以氢气和一氧化碳气体为主体的还原气体，裂解反应时产生的反应热将还原气体继续加热至900℃左右，裂解后的还原气体从裂解器输送至还原段；(2) The coke oven gas entering the cracker is mixed with the oxygen entering the cracker at the same time to undergo a cracking reaction, cracking the alkane and olefin gases in the coke oven gas into a reducing gas mainly composed of hydrogen and carbon monoxide. The reaction heat generated during the cracking reaction further heats the reducing gas to about 900° C. The cracked reducing gas is transported from the cracker to the reduction section; (3)焦炉煤气总管向酸再生炉的燃烧器输送焦炉煤气作为燃气，燃烧器中焦炉煤气混合空气进行燃烧，酸再生炉内在酸再生过程中产生氧化铁砂，900℃左右的氧化铁砂经氧化铁砂下料道进入还原段；(3) The coke oven gas main pipe delivers coke oven gas as fuel gas to the burner of the acid regeneration furnace. The coke oven gas is mixed with air in the burner for combustion. Iron oxide sand is produced in the acid regeneration furnace during the acid regeneration process. The iron oxide sand at about 900°C enters the reduction section through the iron oxide sand feed channel; (4)还原气体在还原段内自下而上连续与自上而下的氧化铁砂进行充分接触，在900℃左右的高温条件下，氧化铁砂被还原气体还原成铁粉，在还原段出口处，氧化铁砂已全部被还原成高纯铁粉；还原段反应后的尾气输送至燃烧器中，将尾气的全部热焓加以利用；(4) The reducing gas continuously contacts the iron oxide sand from top to bottom in the reduction section. Under the high temperature condition of about 900°C, the iron oxide sand is reduced to iron powder by the reducing gas. At the outlet of the reduction section, the iron oxide sand has been completely reduced to high-purity iron powder. The tail gas after the reaction in the reduction section is transported to the burner to utilize all the heat enthalpy of the tail gas. (5)高纯铁粉进入冷却段，与冷却液进行热交换，高纯铁粉被冷却至85℃以下进入后道处理；(5) The high-purity iron powder enters the cooling section and exchanges heat with the coolant. The high-purity iron powder is cooled to below 85°C and enters the post-processing stage; (6)高纯铁粉从冷却段输出后进入抽真空包装机，在保护气氛中进行抽真空包装。(6) After being discharged from the cooling section, the high-purity iron powder enters the vacuum packaging machine and is vacuum packaged in a protective atmosphere.
CN202510254294.9A 2025-03-05 2025-03-05 Acid regeneration byproduct reduction system and reduction method Pending CN120055277A (en)

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