CN217745793U

CN217745793U - Carbon reduction smelting furnace gas purification and utilization system

Info

Publication number: CN217745793U
Application number: CN202220245583.4U
Authority: CN
Inventors: 高麟; 蒋敏; 林士全; 费西; 方忠; 王祺
Original assignee: Intermet Technology Chengdu Co Ltd
Current assignee: Intermet Technology Chengdu Co Ltd
Priority date: 2022-01-29
Filing date: 2022-01-29
Publication date: 2022-11-08
Anticipated expiration: 2032-01-29

Abstract

The utility model discloses a carbon reduction smelting furnace gas purifies and utilizes system to carry out recycle to a large amount of carbon monoxide in the carbon reduction smelting furnace gas, reduce carbon and discharge. The method comprises the following steps: the first heat exchange device is used for receiving the carbon reduction smelting furnace gas and then respectively outputting first heat exchange cooled carbon reduction smelting furnace gas and a first heat exchange heated medium; the filtering and dedusting device is used for receiving the first heat-exchange cooled carbon reduction smelting furnace gas and then outputting dedusted carbon reduction smelting furnace gas; the second heat exchange device is used for receiving the dedusted carbon reduction smelting furnace gas and then respectively outputting a second heat exchange cooled carbon reduction smelting furnace gas and a second heat exchange heated medium; and the gas storage device is used for receiving the second heat exchange cooled carbon reduced smelting furnace gas and then conveying the carbon monoxide stored in the gas storage device to a chemical product production plant area, and a chemical product production system is arranged in the chemical product production plant area.

Description

Carbon reduction smelting furnace gas purification and utilization system

Technical Field

The embodiment of the application relates to a carbon reduction smelting furnace gas purification and utilization system, a yellow phosphorus furnace gas purification and utilization method and a yellow phosphorus furnace gas purification and utilization system.

Background

Carbon-reducing smelting furnace gas refers to industrial furnace gas discharged from an industrial furnace (generally, a submerged arc furnace, i.e., an electric furnace including an arc furnace or a resistance furnace) for pyrotechnically extracting a desired substance from a mineral using a carbon reducing agent (coke, semicoke, coal, etc.) and mainly including carbon monoxide in a gas phase. The 'required substance' can be gaseous substance and is mixed in the carbon reduction smelting furnace gas, typically, the gaseous yellow phosphorus contained in the carbon reduction smelting furnace gas (which can be called yellow phosphorus furnace gas herein) discharged by a large self-baking electrode phosphorus preparation electric furnace or a multi-electrode phosphorus preparation electric furnace for extracting yellow phosphorus from the phosphorus ore by a fire method by using a carbon reducing agent; in this case, the yellow phosphorus is separated from the yellow phosphorus furnace gas, and then the latent heat (combustion) utilization and discharge are carried out on the tail gas. The "required substances" may be non-gaseous substances and discharged separately from the carbon-reducing furnace gas, for example, in an ore furnace for producing ferroalloys such as ferrosilicon and ferromanganese, the ferroalloy and the carbon-reducing furnace gas are discharged separately; in this case, the carbon reduction smelting furnace gas is generally purified and then latent heat (combustion) is utilized and discharged.

In the past, people often only regard the substances required by the pyro-refining from minerals as products and pay attention to the recycling of the products, but a large amount of carbon monoxide in the carbon reduction smelting furnace gas can be recycled as products by neglecting the fact that the products are recycled. Taking yellow phosphorus furnace gas as an example, according to statistics, in the electric furnace method yellow phosphorus production process (the process uses a large self-baking electrode phosphorus making electric furnace or a multi-electrode phosphorus making electric furnace to extract gaseous yellow phosphorus from phosphorus ore by a medium-temperature method, the gaseous yellow phosphorus is discharged from the electric furnace along with yellow phosphorus furnace gas and then condensed by a phosphorus collector to recover yellow phosphorus and further discharge tail gas), about 2500-3000 cubic meters of tail gas can be generated when one ton of yellow phosphorus is obtained, the main component in the tail gas is carbon monoxide with the volume percentage content of 85-92 percent, and the current utilization of the carbon monoxide basically adopts a mode of utilizing latent heat through combustion, so that the emission of the carbon dioxide is increased, obviously, carbon emission reduction is not facilitated, and the trend and the environment of carbon reduction are met.

On the other hand, in the purification link of the carbon reduction smelting furnace gas at present, the utilization efficiency of sensible heat (waste heat) of the carbon reduction smelting furnace gas is not high, and the purification, the utilization of the sensible heat and the utilization of latent heat are not efficiently combined.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application aims to provide a carbon reduction smelting furnace gas purification and utilization system, a carbon reduction smelting furnace gas purification and cooling system and a carbon reduction smelting raw material drying system, and improve the utilization efficiency of sensible heat and/or latent heat of carbon reduction smelting furnace gas. The embodiment of the application also aims to provide a carbon reduction smelting furnace gas purification and utilization system, a yellow phosphorus furnace gas purification and utilization method and a yellow phosphorus furnace gas purification and utilization system, so that a large amount of carbon monoxide in the carbon reduction smelting furnace gas can be recycled, and the carbon emission is reduced.

In order to solve the above technical problems, according to a first aspect of the present application, there is provided a carbon reduction smelting furnace gas purification and utilization system, the carbon reduction smelting furnace gas being industrial furnace gas mainly comprising carbon monoxide and being discharged from an industrial furnace for pyrometallurgical refining of desired substances from minerals using a carbon reducing agent; it includes: the first heat exchange device is used for receiving the carbon reduction smelting furnace gas and the first heat exchange pseudo-heating medium and then respectively outputting a first heat exchange cooled carbon reduction smelting furnace gas and a first heat exchange heated medium; the filtering and dedusting device is used for receiving the first heat-exchange cooled carbon reduction smelting furnace gas and then outputting the dedusted carbon reduction smelting furnace gas, and the filtering and dedusting device physically intercepts dust in the first heat-exchange cooled carbon reduction smelting furnace gas through a filter element; the second heat exchange device is used for receiving the dedusted carbon reduction smelting furnace gas and the second heat exchange pseudo-heating medium and then respectively outputting the second heat exchange cooled carbon reduction smelting furnace gas and the second heat exchange heated medium; the gas storage device is used for receiving the second heat-exchange cooled carbon-reduced smelting furnace gas and then transmitting the carbon monoxide stored in the gas storage device to a fuel gas heat energy utilization system; the gas heat energy utilization system comprises a gas turbine, a waste heat boiler and a steam turbine which are connected in sequence, wherein the gas turbine is used for receiving carbon monoxide which is from the gas storage device and serves as operation fuel of the gas turbine and then respectively outputting first electric energy and waste gas, the waste heat boiler is used for receiving the waste gas and evaporation water and then respectively outputting cooled waste gas and steam, and the steam turbine is used for receiving the steam and outputting second electric energy; the first heat exchange heated medium is steam or hot water, and the second heat exchange heated medium is steam or hot water; when the first heat exchange heated medium and the second heat exchange heated medium are both steam, the first heat exchange heated medium, the second heat exchange heated medium and the steam output by the waste heat boiler are both output to a steam turbine; when the first heat exchange heated medium and the second heat exchange heated medium are both hot water, both the first heat exchange heated medium and the second heat exchange heated medium are output to the waste heat boiler as the evaporation water; when the first heat exchange heated medium is hot water and the second heat exchange heated medium is steam, the first heat exchange heated medium is used as the second heat exchange simulated heating medium and is output to the second heat exchange device, and the second heat exchange heated medium and the steam output by the waste heat boiler are both output to the steam turbine.

Optionally, the temperature of the carbon-reduced smelting furnace gas cooled by the first heat exchange is reduced by T1 ℃ compared with the temperature of the carbon-reduced smelting furnace gas, the temperature of the carbon-reduced smelting furnace gas cooled by the second heat exchange is reduced by T2 ℃ compared with the temperature of the carbon-reduced smelting furnace gas cooled by the first heat exchange, and T2 is more than or equal to T1.

Optionally, the temperature of the cooled carbon-reducing smelting furnace gas in the first heat exchange is decreased by T1 ℃ compared with the temperature of the carbon-reducing smelting furnace gas, the temperature of the cooled carbon-reducing smelting furnace gas in the second heat exchange is decreased by T2 ℃ compared with the temperature of the cooled carbon-reducing smelting furnace gas in the first heat exchange, the temperature of T1 is 100-450 ℃, and the temperature of T2 is 200-450 ℃.

Optionally, the temperature of the cooled carbon reduction smelting furnace gas output by the first heat exchange device is 400-500 ℃.

Optionally, the first heat exchange device is provided with a flow regulating component, and the flow regulating component can regulate the flow of the first heat exchange pseudo-heating medium according to the temperature of the first heat exchange heated medium.

Optionally, the system comprises a third heat exchange device, which is used for receiving the second heat-exchange cooled carbon-reduced smelting furnace gas and a third heat-exchange pseudo-heating medium and then outputting a third heat-exchange cooled carbon-reduced smelting furnace gas and a third heat-exchange heated medium respectively; and the gas storage device is used for receiving the third heat-exchange cooled carbon-reduced smelting furnace gas and then transmitting the carbon monoxide stored in the gas storage device to a fuel gas heat energy utilization system.

Optionally, the heated medium of the third heat exchange is hot water, and the heated medium of the third heat exchange is output to the second heat exchange device as the second heat exchange pseudo-heating medium or is output to the waste heat boiler as the evaporation water.

Optionally, the temperature of the carbon-reduced smelting furnace gas cooled by the first heat exchange is reduced by T1 ℃ compared with the temperature of the carbon-reduced smelting furnace gas, the temperature of the carbon-reduced smelting furnace gas cooled by the second heat exchange is reduced by T2 ℃ compared with the temperature of the carbon-reduced smelting furnace gas cooled by the first heat exchange, the temperature of the carbon-reduced smelting furnace gas cooled by the third heat exchange is reduced by T3 ℃ compared with the carbon-reduced smelting furnace gas cooled by the second heat exchange, and T2 is more than or equal to T1 and more than or equal to T3.

Optionally, the system comprises a tar trapping device, which is used for receiving the cooled carbon-reduced smelting furnace gas of the third heat exchange and then outputting the cooled carbon-reduced smelting furnace gas of the third heat exchange after tar trapping; the gas storage device is used for receiving the cooled carbon-reduced smelting furnace gas subjected to the third heat exchange after the tar is captured, and then transmitting the carbon monoxide stored in the gas storage device to a gas heat energy utilization system.

Optionally, the temperature of the cooled carbon-reduced smelting furnace gas output by the second heat exchange device is 120-170 ℃, and the temperature of the cooled carbon-reduced smelting furnace gas output by the third heat exchange device is below 80 ℃.

Optionally, the first heat exchange device adopts a waste heat boiler or a dividing wall heat exchanger, the second heat exchange device adopts a waste heat boiler or a dividing wall heat exchanger, and the third heat exchange device adopts a dividing wall heat exchanger.

Optionally, the industrial kiln is a silicomanganese smelting submerged arc furnace, a high-carbon ferromanganese smelting submerged arc furnace, a ferronickel smelting submerged arc furnace, a high-titanium slag smelting submerged arc furnace or a calcium carbide smelting submerged arc furnace.

Optionally, the filter element is a metal filter element or a ceramic filter element. Optionally, the dust filtering and removing device can reduce the dust content of the dedusted carbon reduction smelting furnace gas to 100mg/Nm ³ 、50mg/Nm ³ 、20mg/Nm ³ 、10mg/Nm ³ Or 5mg/Nm ³ The following.

Optionally, the system further comprises a smelting raw material drying system, wherein the smelting raw material drying system comprises a smelting raw material drying device and a tail gas dust removal device, the smelting raw material drying device is used for receiving the cooled waste gas and the smelting raw material which is about to enter the industrial kiln, the cooled waste gas is used for drying the smelting raw material, and then tail gas is output, and the tail gas dust removal device is used for receiving the tail gas, performing dust removal treatment and then discharging.

Optionally, the system further comprises a diffusing device, wherein the diffusing device is arranged on a carbon reduction smelting furnace gas discharge channel between the industrial kiln and the first heat exchange device.

Optionally, the system further comprises a desulfurization device, wherein the desulfurization device is arranged at the inlet of the carbon reduction smelting furnace gas, which is cooled by the second heat exchange of the gas storage device. Optionally, the gas storage device is a gas cabinet.

In order to solve the above technical problems, according to a second aspect of the present application, there is provided a carbon reduction smelting furnace gas purification and utilization system, the carbon reduction smelting furnace gas being industrial furnace gas mainly comprising carbon monoxide and being discharged from an industrial furnace for pyrometallurgical refining of desired substances from minerals using a carbon reducing agent; it includes: the first heat exchange device is used for receiving the carbon reduction smelting furnace gas and the first heat exchange simulated heating medium and then respectively outputting the first heat exchange cooled carbon reduction smelting furnace gas and the first heat exchange heated medium; the filtering and dedusting device is used for receiving the first heat-exchange cooled carbon reduction smelting furnace gas and then outputting the dedusted carbon reduction smelting furnace gas, and the filtering and dedusting device physically intercepts dust in the first heat-exchange cooled carbon reduction smelting furnace gas through a filter element; the second heat exchange device is used for receiving the dedusted carbon reduction smelting furnace gas and the second heat exchange pseudo-heating medium and then respectively outputting the second heat exchange cooled carbon reduction smelting furnace gas and the second heat exchange heated medium; the gas storage device is used for receiving the second heat-exchange cooled carbon-reduced smelting furnace gas and then transmitting the carbon monoxide stored in the gas storage device to a fuel gas heat energy utilization system; and a gas heat energy utilization system comprising a gas boiler for receiving the carbon monoxide from the gas storage device and burning the carbon monoxide to heat a secondary intended heating medium comprising the first heat-exchange heated medium and/or the second heat-exchange heated medium and then outputting an exhaust gas and the secondary heated medium, respectively.

Optionally, the first heat-exchange heated medium and the second heat-exchange heated medium are both hot water or respectively hot water and steam; the hot water is output to the gas boiler, and the secondary heated medium is steam.

Optionally, the gas thermal energy utilization system further comprises a steam turbine, and the steam turbine is configured to receive steam as the first heat exchange heated medium or the second heat exchange heated medium and steam as the second heat exchange heated medium and output electric energy.

Optionally, the temperature of the carbon-reduced smelting furnace gas cooled by the first heat exchange is decreased by T1 ℃ compared with the temperature of the carbon-reduced smelting furnace gas, the temperature of the carbon-reduced smelting furnace gas cooled by the second heat exchange is decreased by T2 ℃ compared with the temperature of the carbon-reduced smelting furnace gas cooled by the first heat exchange, the temperature of T1 is 100 ℃ to 450 ℃, and the temperature of T2 is 200 ℃ to 450 ℃.

Optionally, the heated medium of the third heat exchange is hot water, and the heated medium of the third heat exchange is output to the second heat exchange device as the second heat exchange pseudo-heating medium or is output to the gas boiler as the second pseudo-heating medium.

Optionally, the gas storage device is used for receiving the third heat-exchange cooled carbon reduced smelting furnace gas after tar capture and then conveying the carbon monoxide stored in the gas storage device to the gas heat energy utilization system.

Optionally, both the first heat exchange device and the second heat exchange device adopt a dividing wall heat exchanger or respectively adopt a dividing wall heat exchanger and a waste heat boiler, and the third heat exchange device adopts a dividing wall heat exchanger.

Optionally, the system further comprises a smelting raw material drying system, wherein the smelting raw material drying system comprises a smelting raw material drying device and a tail gas dust removal device, the smelting raw material drying device is used for receiving the waste gas and the smelting raw material which is about to enter the industrial kiln and drying the smelting raw material through the waste gas and then outputting tail gas, and the tail gas dust removal device is used for receiving the tail gas, performing dust removal treatment and then discharging the tail gas.

Optionally, the system further comprises a desulfurization device, wherein the desulfurization device is arranged at the inlet of the carbon reduction smelting furnace gas, which is cooled by the second heat exchange of the gas storage device. Optionally, the gas storage device is a gas holder.

In order to solve the above technical problems, according to a third aspect of the present application, there is provided a carbon-reducing smelting furnace gas purification and cooling system, the carbon-reducing smelting furnace gas being industrial furnace gas discharged from an industrial furnace for pyro-refining a desired substance from minerals using a carbon reducing agent, the gas phase of the industrial furnace gas mainly including carbon monoxide; it includes: the first heat exchange device is used for receiving the carbon reduction smelting furnace gas and the first heat exchange simulated heating medium and then respectively outputting the first heat exchange cooled carbon reduction smelting furnace gas and the first heat exchange heated medium; the filtering and dedusting device is used for receiving the first heat exchange cooled carbon reduction smelting furnace gas and then outputting dedusted carbon reduction smelting furnace gas, and physically intercepting dust in the first heat exchange cooled carbon reduction smelting furnace gas through a filter element; the second heat exchange device is used for receiving the dedusted carbon reduction smelting furnace gas and the second heat exchange pseudo-heating medium and then respectively outputting the second heat exchange cooled carbon reduction smelting furnace gas and the second heat exchange heated medium; and the gas storage device is used for receiving the second heat-exchange cooled carbon-reduced smelting furnace gas and then conveying the carbon monoxide stored in the gas storage device to a required place.

Optionally, the first heat-exchange heated medium is output to the second heat exchange device as the second heat-exchange pseudo-heating medium.

Optionally, the system comprises a third heat exchange device, which is used for receiving the second heat-exchange cooled carbon-reduced smelting furnace gas and a third heat-exchange pseudo-heating medium and then outputting a third heat-exchange cooled carbon-reduced smelting furnace gas and a third heat-exchange heated medium respectively; and the gas storage device is used for receiving the third heat-exchanged cooled carbon-reduction smelting furnace gas.

Optionally, the heated medium of the third heat exchange is hot water, and the heated medium of the third heat exchange is output to the second heat exchange device as the second heat exchange pseudo-heating medium.

Optionally, the system comprises a tar trapping device, which is used for receiving the cooled carbon-reduced smelting furnace gas of the third heat exchange and then outputting the cooled carbon-reduced smelting furnace gas of the third heat exchange after tar trapping; and the gas storage device is used for receiving the cooled carbon reduction smelting furnace gas after the tar is trapped.

In order to solve the above technical problems, according to a fourth aspect of the present application, there is provided a carbon-reduced smelting raw material drying system, the carbon-reduced smelting raw material being a smelting raw material used by an industrial kiln for pyrometallurgical refining of a desired substance from minerals using a carbon reducing agent; it comprises the following steps: the smelting raw material drying device is used for receiving waste gas and smelting raw materials which are supposed to enter the industrial kiln, drying the smelting raw materials through the waste gas and then outputting tail gas; the tail gas dedusting device is used for receiving the tail gas, dedusting and discharging; wherein the waste gas is generated after carbon monoxide recovered from carbon reduction smelting furnace gas is combusted and utilized, and the carbon reduction smelting furnace gas is the industrial kiln gas.

Optionally, a diffusing device is arranged on a carbon reduction smelting furnace gas discharge channel of the industrial kiln, and the diffusing device diffuses through the tail gas dust removal device.

Optionally, the waste gas is generated by a carbon reduction smelting furnace gas purification and utilization system, and the carbon reduction smelting furnace gas purification and utilization system includes: the first heat exchange device is used for receiving the carbon reduction smelting furnace gas and the first heat exchange simulated heating medium and then respectively outputting the first heat exchange cooled carbon reduction smelting furnace gas and the first heat exchange heated medium; the filtering and dedusting device is used for receiving the first heat-exchange cooled carbon reduction smelting furnace gas and then outputting the dedusted carbon reduction smelting furnace gas, and the filtering and dedusting device physically intercepts dust in the first heat-exchange cooled carbon reduction smelting furnace gas through a filter element; the second heat exchange device is used for receiving the dedusted carbon-reduction smelting furnace gas and the second heat exchange pseudo-heating medium and then respectively outputting a second heat exchange cooled carbon-reduction smelting furnace gas and a second heat exchange heated medium; the gas storage device is used for receiving the second heat-exchange cooled carbon reduction smelting furnace gas and then conveying the carbon monoxide stored in the gas storage device to a gas heat energy utilization system; the fuel gas heat energy utilization system comprises carbon monoxide combustion equipment, and the waste gas is discharged after the carbon monoxide combustion equipment burns.

Optionally, the first heat exchange heated medium is output to the second heat exchange device as the second heat exchange pseudo-heating medium.

Optionally, the system comprises a third heat exchange device, which is used for receiving the second heat-exchange cooled carbon-reduced smelting furnace gas and a third heat-exchange pseudo-heating medium and then outputting a third heat-exchange cooled carbon-reduced smelting furnace gas and a third heat-exchange heated medium respectively; and the gas storage device is used for receiving the third heat-exchange cooled carbon-reduction smelting furnace gas.

Optionally, the system comprises a tar trapping device, which is used for receiving the cooled carbon-reduced smelting furnace gas of the third heat exchange and then outputting the cooled carbon-reduced smelting furnace gas of the third heat exchange after tar trapping; and the gas storage device is used for receiving the cooled carbon reduction smelting furnace gas after the tar is captured and subjected to third heat exchange.

Optionally, the filter element is a metal filter element or a ceramic filter element. Optionally, the system further comprises a desulfurization device, wherein the desulfurization device is arranged at the inlet of the carbon reduction smelting furnace gas cooled by the second heat exchange of the gas storage device. Optionally, the gas storage device is a gas holder.

In order to solve the above technical problems, according to a fifth aspect of the present application, there is provided a carbon-reducing smelting furnace gas purification and utilization system, the carbon-reducing smelting furnace gas being an industrial furnace gas discharged from an industrial furnace for pyro-refining a desired substance from a mineral using a carbon reducing agent, the gas phase of the industrial furnace gas mainly including carbon monoxide; it includes: the first heat exchange device is used for receiving the carbon reduction smelting furnace gas and the first heat exchange simulated heating medium and then respectively outputting the first heat exchange cooled carbon reduction smelting furnace gas and the first heat exchange heated medium; the filtering and dedusting device is used for receiving the first heat-exchange cooled carbon reduction smelting furnace gas and then outputting the dedusted carbon reduction smelting furnace gas, and the filtering and dedusting device physically intercepts dust in the first heat-exchange cooled carbon reduction smelting furnace gas through a filter element; the second heat exchange device is used for receiving the dedusted carbon-reduction smelting furnace gas and the second heat exchange pseudo-heating medium and then respectively outputting a second heat exchange cooled carbon-reduction smelting furnace gas and a second heat exchange heated medium; the gas storage device is used for receiving the cooled carbon reduction smelting furnace gas subjected to the second heat exchange and then conveying the carbon monoxide stored in the gas storage device to a chemical product production plant, and the chemical product production plant and a carbon reduction smelting furnace gas purification plant for implementing the carbon reduction smelting furnace gas purification belong to the same industrial park or do not belong to the same industrial park but are connected through a gas conveying pipe network; and the chemical product production system is positioned in the chemical product production plant area and used for receiving the carbon monoxide from the gas storage device and producing the carbon monoxide serving as a raw material to obtain a chemical product.

In order to solve the above technical problems, according to a sixth aspect of the present application, there is provided a carbon-reducing smelting furnace gas purification and utilization system, the carbon-reducing smelting furnace gas being an industrial furnace gas discharged from an industrial furnace for pyro-refining a desired substance from a mineral using a carbon reducing agent, the gas phase of the industrial furnace gas mainly including carbon monoxide; it includes: the first heat exchange device is used for receiving the carbon reduction smelting furnace gas and then respectively outputting first heat exchange cooled carbon reduction smelting furnace gas and a first heat exchange heated medium; the filtering and dedusting device is used for receiving the first heat-exchange cooled carbon reduction smelting furnace gas and then outputting the dedusted carbon reduction smelting furnace gas, and the filtering and dedusting device physically intercepts dust in the first heat-exchange cooled carbon reduction smelting furnace gas through a filter element; the second heat exchange device is used for receiving the dedusted carbon reduction smelting furnace gas and then respectively outputting a second heat exchange cooled carbon reduction smelting furnace gas and a second heat exchange heated medium; and the gas storage device is used for receiving the second heat exchange cooled carbon reduction smelting furnace gas and then delivering the carbon monoxide stored in the gas storage device to a chemical product production plant, the chemical product production plant and the carbon reduction smelting furnace gas purification plant for implementing carbon reduction smelting furnace gas purification belong to the same industrial park or do not belong to the same industrial park but are connected through a gas delivery pipe network, a chemical product production system is arranged in the chemical product production plant, and the chemical product production system is used for receiving the carbon monoxide from the gas storage device and producing the carbon monoxide as a raw material to obtain a chemical product.

In the fifth aspect and the sixth aspect, optionally, the temperature of the carbon-reduced smelting furnace gas subjected to the first heat exchange is decreased by T1 ℃ compared with the temperature of the carbon-reduced smelting furnace gas, the temperature of the carbon-reduced smelting furnace gas subjected to the second heat exchange is decreased by T2 ℃ compared with the temperature of the carbon-reduced smelting furnace gas subjected to the first heat exchange, and T2 is not less than T1.

In the fifth aspect and the sixth aspect, optionally, the first heat-exchange heated medium is output to the second heat exchange device as the second heat-exchange pseudo heating medium.

In the fifth aspect and the sixth aspect, optionally, the heat recovery device includes a third heat exchange device, configured to receive the second heat-exchanged cooled carbon-reducing smelting furnace gas and the second heat-exchange pseudo-heating medium, and then output a third heat-exchanged cooled carbon-reducing smelting furnace gas and a third heat-exchange heated medium, respectively; and the gas storage device is used for receiving the third heat-exchange cooled carbon-reduced smelting furnace gas and then conveying the carbon monoxide stored in the gas storage device to a chemical product production plant.

In the fifth aspect and the sixth aspect, optionally, the temperature of the carbon-reduced smelting furnace gas subjected to the first heat exchange is decreased by T1 ℃ compared with the temperature of the carbon-reduced smelting furnace gas, the temperature of the carbon-reduced smelting furnace gas subjected to the second heat exchange is decreased by T2 ℃ compared with the temperature of the carbon-reduced smelting furnace gas subjected to the first heat exchange, the temperature of the carbon-reduced smelting furnace gas subjected to the third heat exchange is decreased by T3 ℃ compared with the temperature of the carbon-reduced smelting furnace gas subjected to the second heat exchange, and T2 is greater than or equal to T1 and is greater than or equal to T3.

In the fifth aspect and the sixth aspect, optionally, the system includes a tar collecting device, configured to receive the cooled carbon-reduced smelting furnace gas subjected to the third heat exchange, and output the cooled carbon-reduced smelting furnace gas subjected to the third heat exchange after being collected by tar; and the gas storage device is used for receiving the cooled carbon-reduced smelting furnace gas subjected to the third heat exchange after the tar is captured and then conveying the carbon monoxide stored in the gas storage device to a chemical product production plant.

In the fifth aspect and the sixth aspect, optionally, the temperature of the cooled carbon-reduced smelting furnace gas output by the second heat exchanging device is 120 ℃ to 170 ℃, and the temperature of the cooled carbon-reduced smelting furnace gas output by the third heat exchanging device is below 80 ℃.

In the fifth aspect and the sixth aspect, optionally, the first heat exchange device adopts a waste heat boiler or a dividing wall heat exchanger, the second heat exchange device adopts a waste heat boiler or a dividing wall heat exchanger, and the third heat exchange device adopts a dividing wall heat exchanger.

In the fifth aspect and the sixth aspect, optionally, the medium to be heated in the first heat exchange is steam or hot water, the medium to be heated in the second heat exchange is steam or hot water, and the medium to be heated in the second heat exchange is hot water.

In the fifth aspect and the sixth aspect, optionally, the temperature of the cooled carbon-reducing smelting furnace gas in the first heat exchange is decreased by T1 ℃ compared with the temperature of the carbon-reducing smelting furnace gas, the temperature of the cooled carbon-reducing smelting furnace gas in the second heat exchange is decreased by T2 ℃ compared with the temperature of the cooled carbon-reducing smelting furnace gas in the first heat exchange, the temperature of T1 is 100 ℃ to 450 ℃, and the temperature of T2 is 200 ℃ to 450 ℃.

In the fifth aspect and the sixth aspect, optionally, the temperature of the cooled carbon-reduction smelting furnace gas output by the first heat exchanging device is 400 ℃ to 500 ℃.

In the fifth aspect and the sixth aspect, optionally, the first heat exchange device has a flow rate adjustment component, and the flow rate adjustment component can adjust the flow rate of the first heat exchange pseudo heating medium according to the temperature of the first heat exchange heated medium.

In the fifth aspect and the sixth aspect, optionally, the chemical product includes any one or more of formic acid, formate, acetic acid, acetate, methanol, formaldehyde, ethylene glycol, and synthetic ammonia products.

In the fifth aspect and the sixth aspect, optionally, the industrial kiln is a silicomanganese smelting submerged arc furnace, a high-carbon ferromanganese smelting submerged arc furnace, a ferronickel smelting submerged arc furnace, a high-titanium slag smelting submerged arc furnace, or a calcium carbide smelting submerged arc furnace.

In the fifth and sixth aspects, optionally, the filter element is a metal filter element or a ceramic filter element. Optionally, the dust filtering and removing device can reduce the dust content of the dedusted carbon reduction smelting furnace gas to 100mg/Nm ³ 、50mg/Nm ³ 、20mg/Nm ³ 、10mg/Nm ³ Or 5mg/Nm ³ The following.

In the fifth aspect and the sixth aspect, optionally, the system further comprises a desulfurization device, and the desulfurization device is arranged at the inlet of the cooled carbon-reduction smelting furnace gas of the second heat exchange of the gas storage device.

The systems of the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect and the sixth aspect can improve the utilization efficiency of sensible heat and/or latent heat of carbon reduction smelting furnace gas. In addition, the system of the fifth aspect and the sixth aspect can recycle a large amount of carbon monoxide in the carbon reduction smelting furnace gas, thereby reducing carbon emission.

In order to solve the technical problems, according to a seventh aspect of the application, a method for purifying and utilizing yellow phosphorus furnace gas is provided, wherein the yellow phosphorus furnace gas is discharged from an industrial furnace for extracting yellow phosphorus from phosphorite by a fire method by using a carbon reducing agent, and the gas phase mainly comprises gaseous yellow phosphorus and carbon monoxide; the method comprises the following steps: receiving the yellow phosphorus furnace gas through a dust removal device and then outputting the dust-removed yellow phosphorus furnace gas; receiving the dedusted yellow phosphorus furnace gas through a yellow phosphorus condensation and recovery device, and then respectively outputting the yellow phosphorus and cooled gas which are condensed and recovered; receiving the cooled gas through a gas storage device and then delivering the carbon monoxide stored in the gas storage device to a chemical product production plant, wherein the chemical product production plant and a yellow phosphorus furnace gas purification plant for purifying the yellow phosphorus furnace gas belong to the same industrial park or do not belong to the same industrial park but are connected through a gas delivery pipe network; and receiving the carbon monoxide from the gas storage device through a chemical product production system and producing the carbon monoxide as a raw material to obtain a chemical product, wherein the chemical product production system is positioned in the chemical product factory.

According to the eighth aspect of the application, a method for purifying and utilizing yellow phosphorus furnace gas is provided, the yellow phosphorus furnace gas is discharged from an industrial furnace for extracting yellow phosphorus from phosphorite by a fire method by using a carbon reducing agent, and the gas phase mainly comprises gaseous yellow phosphorus and carbon monoxide; the method comprises the following steps: receiving the yellow phosphorus furnace gas through a dust removal device and then outputting the dust-removed yellow phosphorus furnace gas; receiving the dedusted yellow phosphorus furnace gas through a yellow phosphorus condensation and recovery device, and then respectively outputting the yellow phosphorus and cooled gas which are condensed and recovered; receive through gaseous storage device by cooling gas then will carbon monoxide of storage among the gaseous storage device is defeated to the chemical products factory, the chemical products factory with implement yellow phosphorus furnace gas purification factory of yellow phosphorus furnace gas purification belongs to in the same industrial park or does not belong to same industrial park but link to each other through the gas transmission pipe network, be equipped with the chemical products production system in the chemical products factory, the chemical products production system is used for receiving and comes from gas storage device's carbon monoxide and regard this carbon monoxide as the raw material production to obtain the chemical products.

In the seventh and eighth aspects, optionally, the dust removal device is a filter dust removal device, and the filter dust removal device physically intercepts dust in the yellow phosphorus furnace gas through a filter element. Optionally, the filter element is a metal filter element or a ceramic filter element.

In the seventh and eighth aspects, optionally, the dust filtering and removing device can reduce the dust content of the dedusted carbon reduction smelting furnace gas to 100mg/Nm ³ 、50mg/Nm ³ 、20mg/Nm ³ 、10mg/Nm ³ Or 5mg/Nm ³ The following.

In the seventh aspect and the eighth aspect, optionally, the method further includes: judging whether the cooled gas meets the condition of entering the gas storage device, when the cooled gas does not meet the condition of entering the gas storage device, discharging the cooled gas through a diffusing device arranged between the yellow phosphorus condensation and recovery device and the gas storage device, and when the cooled gas meets the condition of entering the gas storage device, enabling the cooled gas to enter the gas storage device.

In the seventh aspect and the eighth aspect, optionally, the condition includes a first condition, where the first condition is whether the chemical product production system receives carbon monoxide, if so, the first condition is met, and otherwise, the first condition is not met. Optionally, the instruction whether the chemical product production system receives carbon monoxide is obtained through a control valve arranged between the gas storage device and the chemical product production system.

In the seventh aspect and the eighth aspect, optionally, the condition includes a second condition that whether or not the storage amount of carbon monoxide in the gas storage device is equal to or greater than a set threshold value does not meet the second condition, and otherwise, the second condition is met.

In the seventh aspect and the eighth aspect, optionally, the method further includes: and the temperature of the dedusted yellow phosphorus furnace gas is kept above the dew point temperature of the gaseous yellow phosphorus by a temperature control device arranged between the industrial kiln and the dedusting device and/or on the dedusting device. Optionally, the temperature control device is an electric heater.

In the seventh and eighth aspects, optionally, the yellow phosphorus furnace gas purification plant area for implementing the yellow phosphorus furnace gas purification is configured to correspond to the condensed and recovered yellow phosphorus yield being greater than or equal to 2 ten thousand tons/year.

In the seventh and eighth aspects, optionally, the yellow phosphorus condensation and recovery device includes a yellow phosphorus condensation liquid tank, the yellow phosphorus condensation liquid tank is used for storing yellow phosphorus condensate, and the yellow phosphorus condensation and recovery device obtains the cooled gas emerging from the liquid surface of the yellow phosphorus condensate by directly contacting the dedusted yellow phosphorus furnace gas with the yellow phosphorus condensate from below the liquid surface of the yellow phosphorus condensate. Optionally, the yellow phosphorus condensate is water.

In the seventh aspect and the eighth aspect, optionally, the chemical product includes any one or more of formic acid, formate, acetic acid, acetate, methanol, formaldehyde, ethylene glycol, and synthetic ammonia products.

In the seventh and eighth aspects, optionally, the industrial kiln is an electric furnace. Optionally, the electric furnace is a large self-baking electrode phosphorus preparation electric furnace or a multi-electrode phosphorus preparation electric furnace.

In the seventh aspect and the eighth aspect, optionally, the method further includes: the method comprises the steps of distributing carbon monoxide stored in the gas storage device, receiving one path of the distributed carbon monoxide as fuel through a gas boiler, respectively outputting waste gas and steam, and then drying smelting raw materials to be fed into the industrial kiln by using the waste gas.

In order to solve the technical problems, according to a ninth aspect of the present application, there is provided a yellow phosphorus furnace gas purification and utilization system, the yellow phosphorus furnace gas is discharged from an industrial kiln for extracting yellow phosphorus from phosphorite by a fire method by using a carbon reducing agent, and the gas phase mainly comprises gaseous yellow phosphorus and carbon monoxide; it comprises the following steps: the dust removal device is used for receiving the yellow phosphorus furnace gas and then outputting the dust-removed yellow phosphorus furnace gas; the yellow phosphorus condensation recovery device is used for receiving the dedusted yellow phosphorus furnace gas and then respectively outputting the condensed recovered yellow phosphorus and the cooled gas; the gas storage device is used for receiving the cooled gas and then conveying the carbon monoxide stored in the gas storage device to a chemical product production plant, and the chemical product production plant and a yellow phosphorus furnace gas purification plant for purifying the yellow phosphorus furnace gas belong to the same industrial park or do not belong to the same industrial park but are connected through a gas conveying pipe network; and the chemical product production system is positioned in the chemical product production plant area and used for receiving the carbon monoxide from the gas storage device and producing the chemical product by taking the carbon monoxide as a raw material.

In order to solve the above technical problems, according to a tenth aspect of the present application, there is provided a yellow phosphorus furnace gas purification and utilization system, the yellow phosphorus furnace gas being discharged from an industrial kiln for pyro-refining yellow phosphorus from phosphorus ore using a carbon reducing agent and having a gas phase mainly comprising gaseous yellow phosphorus and carbon monoxide; it includes: the dust removal device is used for receiving the yellow phosphorus furnace gas and then outputting the dust-removed yellow phosphorus furnace gas; the yellow phosphorus condensation recovery device is used for receiving the dedusted yellow phosphorus furnace gas and then respectively outputting the condensed recovered yellow phosphorus and the cooled gas; the gas storage device is used for receiving the cooled gas and then delivering the carbon monoxide stored in the gas storage device to a chemical product factory, the chemical product factory and the yellow phosphorus furnace gas purification factory for purifying the yellow phosphorus furnace gas belong to the same industrial park or do not belong to the same industrial park but are connected through a gas delivery pipe network, a chemical product production system is arranged in the chemical product factory, and the chemical product production system is used for receiving the carbon monoxide from the gas storage device and producing the carbon monoxide as a raw material to obtain a chemical product.

In the above ninth aspect and the tenth aspect, optionally, the dust removal device is a filtering dust removal device, and the filtering dust removal device physically intercepts dust in the yellow phosphorus furnace gas through a filter element. Optionally, the filter element is a metal filter element or a ceramic filter element.

In the ninth and tenth aspects, optionally, the dust filtering and removing device may reduce the dust content in the dedusted carbon-reducing smelting furnace gas to 100mg/Nm ³ 、50mg/Nm ³ 、20mg/Nm ³ 、10mg/Nm ³ Or 5mg/Nm ³ The following.

In the ninth aspect and the tenth aspect, optionally, a diffusing device is further included, which is disposed between the yellow phosphorus condensation and recovery device and the gas storage device, and is configured to discharge the cooled gas when the cooled gas does not meet the condition of entering the gas storage device.

In the above ninth aspect and the tenth aspect, optionally, the condition includes a first condition, where the first condition is whether the chemical product production system receives carbon monoxide, if so, the first condition is met, and otherwise, the first condition is not met. Optionally, the instruction whether the chemical product production system receives carbon monoxide is obtained through a control valve arranged between the gas storage device and the chemical product production system.

In the ninth aspect and the tenth aspect, optionally, the condition includes a second condition that whether or not the storage amount of carbon monoxide in the gas storage device is equal to or greater than a set threshold value does not meet the second condition, and otherwise, the second condition is met.

In the ninth aspect and the tenth aspect, optionally, the system further comprises a temperature control device, which is disposed between the industrial kiln and the dust removal device, and is configured to maintain the temperature of the dust-removed yellow phosphorus furnace gas above the dew point temperature of the gaseous yellow phosphorus.

In the ninth and tenth aspects, optionally, the yellow phosphorus furnace gas purification plant area for implementing the yellow phosphorus furnace gas purification is configured to correspond to the condensed and recovered yellow phosphorus yield being greater than or equal to 2 ten thousand tons/year.

In the ninth aspect and the tenth aspect, optionally, the yellow phosphorus condensation and recovery device includes a yellow phosphorus condensation liquid tank, the yellow phosphorus condensation liquid tank is used for storing yellow phosphorus condensate, and the yellow phosphorus condensation and recovery device obtains the cooled gas emerging from the liquid surface of the yellow phosphorus condensate by directly contacting the dedusted yellow phosphorus furnace gas with the yellow phosphorus condensate from below the liquid surface of the yellow phosphorus condensate; the yellow phosphorus condensate adopts water.

In the ninth aspect and the tenth aspect, optionally, the chemical product includes any one or more of formic acid, formate, acetic acid, acetate, methanol, formaldehyde, ethylene glycol, and synthetic ammonia products.

In the ninth aspect and the tenth aspect, optionally, the industrial kiln is an electric furnace. Optionally, the gas storage device is a gas holder.

The methods and systems of the seventh, eighth, ninth and tenth aspects can recycle a large amount of carbon monoxide in the yellow phosphorus furnace gas, and reduce carbon emission.

The present application will be further described with reference to the following drawings and detailed description. Additional aspects and advantages provided by the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to assist in understanding the present application and are incorporated in and constitute a part of this specification, with the understanding that the present application is to be considered an exemplification of the principles of the invention and is not intended to be unduly limiting. In the drawings:

FIG. 1 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a carbon-reducing smelting furnace gas purification and utilization system according to an embodiment of the present application.

FIG. 3 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application.

FIG. 4 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application.

FIG. 5 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application.

FIG. 6 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application.

FIG. 7 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application.

FIG. 8 is a system for cleaning and utilizing yellow phosphorus furnace gas according to an embodiment of the present application.

Detailed Description

The embodiments of the present application will be described more fully hereinafter with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the embodiments of the present application based on these descriptions. Before the embodiments of the present application are explained in conjunction with the drawings, it should be particularly pointed out that:

the technical solutions and features provided in the respective sections including the following description may be combined with each other without conflict. Furthermore, where possible, these technical solutions, technical features and related combinations may be given specific technical subject matter and are protected by the accompanying patent.

The embodiments of the present application referred to in the following description are generally only some embodiments, rather than all embodiments, and all other embodiments that can be derived by one of ordinary skill in the art based on these embodiments without making creative efforts shall fall within the scope of patent protection.

The terms "comprising," "including," "having," and any variations thereof in this specification and in the claims and following claims are intended to cover non-exclusive inclusions.

FIG. 1 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application. As shown in fig. 1, a system for purifying and utilizing carbon reduction smelting furnace gas refers to the industrial furnace gas mainly comprising carbon monoxide, which is discharged from an industrial furnace 1 for extracting required substances from minerals by a fire process using a carbon reducing agent, for example, the industrial furnace 1 may be a silicomanganese smelting submerged arc furnace, a high-carbon ferromanganese smelting submerged arc furnace, a ferronickel smelting submerged arc furnace, a high-titanium slag smelting submerged arc furnace, a calcium carbide smelting submerged arc furnace, or the like. The silicomanganese smelting ore-smelting furnace is characterized in that substances required for refining are silicomanganese alloy, the high-carbon ferromanganese smelting ore-smelting furnace is characterized in that substances required for refining are high-carbon ferromanganese, and the like. Referring to fig. 1, the carbon reduction smelting furnace gas purification and utilization system comprises a first heat exchange device 2, a filtering and dust removing device 4, a second heat exchange device 5, a gas storage device 10 and a fuel gas heat energy utilization system. The first heat exchange device 2 is used for receiving the carbon reduction smelting furnace gas and the first heat exchange simulated heating medium and then respectively outputting first heat exchange cooled carbon reduction smelting furnace gas and the first heat exchange heated medium; the filtering and dust removing device 4 is used for receiving the first heat exchange cooled carbon reduction smelting furnace gas and then outputting the dust-removed carbon reduction smelting furnace gas, and the filtering and dust removing device 4 physically intercepts dust in the first heat exchange cooled carbon reduction smelting furnace gas through a filter element; the second heat exchange device 5 is used for receiving the dedusted carbon-reducing smelting furnace gas and the second heat exchange pseudo-heating medium and then respectively outputting a second heat exchange cooled carbon-reducing smelting furnace gas and a second heat exchange heated medium; the gas storage device 10 is used for receiving the second heat-exchange cooled carbon-reduced smelting furnace gas and then transmitting the carbon monoxide stored in the gas storage device to a gas heat energy utilization system; the gas heat energy utilization system comprises a gas turbine 11, a waste heat boiler 12 and a steam turbine 13 which are connected in sequence, wherein the gas turbine 11 is used for receiving the carbon monoxide which is taken as the gas turbine operation fuel from the gas storage device 10 and then respectively outputs first electric energy and waste gas, the waste heat boiler 12 is used for receiving the waste gas and the evaporation water and then respectively outputs cooled waste gas and steam, and the steam turbine 13 is used for receiving the steam and outputting second electric energy. Specifically, in this embodiment, the first heat exchanger 2 and the second heat exchanger 5 both employ waste heat boilers, and the first heat exchange heated medium and the second heat exchange heated medium are both steam (i.e., the first heat exchange intended heating medium and the second heat exchange intended heating medium are water, and are usually soft water), and the first heat exchange heated medium, the second heat exchange heated medium and the steam output by the waste heat boiler 12 are both output to the steam turbine 13, and the steam turbine 13 outputs the second electric energy by using the steam. In addition, the gas storage device 10 may employ a gas tank (the structure is the same as the gas tank).

The carbon reduction smelting furnace gas purification and utilization system of the embodiment has the following operation process: the industrial kiln 1 operates and outputs carbon-reducing smelting furnace gas, and the first heat exchange device 2 receives the carbon-reducing smelting furnace gas and the first heat exchange pseudo-heating medium, and then exchanges heat between the carbon-reducing smelting furnace gas and the first heat exchange pseudo-heating medium so as to respectively output the first heat exchange cooled carbon-reducing smelting furnace gas and the first heat exchange heated medium (steam). Here, the first heat exchange device 2 not only utilizes a part of heat of the carbon reduction smelting furnace gas, but also reduces the temperature of the carbon reduction smelting furnace gas output by the industrial kiln 1 after passing through the first heat exchange device 2 because the temperature of the carbon reduction smelting furnace gas is high (the upper temperature limit can reach 600 ℃ -900 ℃), so that the temperature requirement of the subsequent filtering and dust removing device 4 is met, and the damage of key parts such as a filter element in the filtering and dust removing device 4 is avoided. And then, the first heat exchange carbon reduction smelting furnace gas enters a filtering and dedusting device 4, and the filtering and dedusting device 4 physically intercepts dust in the first heat exchange carbon reduction smelting furnace gas through a filter element, so that the first heat exchange carbon reduction smelting furnace gas is dedusted, and the dedusted carbon reduction smelting furnace gas is output. Because the dust content in the dedusted carbon reduction smelting furnace gas is reduced, the second heat exchange device 5 can operate stably for a long time, and meanwhile, the heat exchange efficiency of the second heat exchange device 5 can be improved. And then, the dedusted carbon-reducing smelting furnace gas enters a second heat exchange device 5, and the second heat exchange device 5 receives the dedusted carbon-reducing smelting furnace gas and a second heat exchange pseudo-heating medium, and then performs heat exchange between the dedusted carbon-reducing smelting furnace gas and the second heat exchange pseudo-heating medium so as to respectively output a second heat exchange cooled carbon-reducing smelting furnace gas and a second heat exchange heated medium (steam). After that, the second heat exchange is carried out by cooling the carbon reduction smelting furnace gas to enter the gas storage device 10, and the gas storage device 10 transmits the stored carbon monoxide to the gas heat energy utilization system. In the gas heat energy utilization system, the gas turbine 11 receives the carbon monoxide from the gas storage device 10 as the gas turbine operation fuel and then outputs the first electric power and the exhaust gas, respectively, the exhaust heat boiler 12 receives the exhaust gas and the evaporation water (typically soft water) and then outputs the cooled exhaust gas and the steam, respectively, and the steam turbine 13 receives the steam (from the first heat exchanging device 2, the second heat exchanging device 5, and the exhaust heat boiler 12, respectively) and outputs the second electric power. Therefore, the carbon reduction smelting furnace gas purification and utilization system of the embodiment can improve the utilization efficiency of sensible heat and latent heat of the carbon reduction smelting furnace gas.

As an alternative scheme of the carbon-reducing smelting furnace gas purification and utilization system of the above embodiment, if it is assumed that the temperature of the carbon-reducing smelting furnace gas cooled by the first heat exchange is reduced by T1 ℃ compared with the temperature of the carbon-reducing smelting furnace gas, and the temperature of the carbon-reducing smelting furnace gas cooled by the second heat exchange is reduced by T2 ℃ compared with the temperature of the carbon-reducing smelting furnace gas cooled by the first heat exchange, T2 is greater than or equal to T1. The main purpose of the design is to distribute the residual heat of the carbon reduction smelting furnace gas between the first heat exchange device 2 and the second heat exchange device 5 on the second heat exchange device 5 as much as possible, namely to more fully utilize the second heat exchange device 5. Because the dust content in the dedusted carbon reduction smelting furnace gas is reduced, the second heat exchange device 5 can stably operate for a long time, and meanwhile, the heat exchange efficiency of the second heat exchange device 5 can also be improved.

In the carbon-reducing smelting furnace gas purification and utilization system of the above embodiment, generally speaking, if it is assumed that the temperature of the carbon-reducing smelting furnace gas cooled by the first heat exchange is decreased by T1 ℃ compared with the temperature of the carbon-reducing smelting furnace gas, and the temperature of the carbon-reducing smelting furnace gas cooled by the second heat exchange is decreased by T2 ℃ compared with the temperature of the carbon-reducing smelting furnace gas cooled by the first heat exchange, then T1 is 100 ℃ to 450 ℃ and T2 is 200 ℃ to 450 ℃.

In the carbon reduction smelting furnace gas purification and utilization system of the above embodiment, generally speaking, the temperature of the cooled carbon reduction smelting furnace gas output by the first heat exchange device is 400 ℃ to 500 ℃. When the temperature of the first heat exchange cooled carbon reduction smelting furnace gas output by the first heat exchange device is 400-500 ℃, the filtering and dedusting device actually filters and removes dust from the first heat exchange cooled carbon reduction smelting furnace gas with higher temperature, so that the waste heat of the carbon reduction smelting furnace gas can be further ensured to be distributed on the second heat exchange device 5 as much as possible.

As an alternative to the carbon-reduction smelting furnace gas purification and utilization system of the above embodiment, the first heat exchange device has a flow rate adjustment component, and the flow rate adjustment component can adjust the flow rate of the first heat exchange pseudo-heating medium according to the temperature of the first heat exchange heated medium. Therefore, the temperature of the heated medium of the first heat exchange can be controlled more accurately. The flow rate adjusting means may employ a flow rate control valve, and control of the flow rate control valve may be automatically controlled by a controller (e.g., a PLC controller) connected to a sensor that detects the temperature of the first heat exchange heated medium.

As an improvement, the carbon-reducing smelting furnace gas purification and utilization system of the above embodiment may further include a third heat exchange device 6, configured to receive the second heat-exchanged cooled carbon-reducing smelting furnace gas and the third heat-exchange pseudo-heating medium, and then output the third heat-exchanged cooled carbon-reducing smelting furnace gas and the third heat-exchange heated medium, respectively. At this time, the gas storage device 10 is configured to receive the carbon-reduced smelting furnace gas cooled by the third heat exchange, and then transmit the carbon monoxide stored in the gas storage device 10 to a gas heat energy utilization system. In this embodiment, the third heat exchange device 6 employs a partition wall heat exchanger.

In a preferred embodiment, the third heat exchange heated medium is hot water, and the third heat exchange heated medium is output to the second heat exchange device 5 as the second heat exchange pseudo heating medium.

In a preferred embodiment, if the temperature of the carbon-reducing smelting furnace gas cooled in the first heat exchange is decreased by T1 ℃ compared with the temperature of the carbon-reducing smelting furnace gas, the temperature of the carbon-reducing smelting furnace gas cooled in the second heat exchange is decreased by T2 ℃ compared with the temperature of the carbon-reducing smelting furnace gas cooled in the first heat exchange, the temperature of the carbon-reducing smelting furnace gas cooled in the third heat exchange is decreased by T3 ℃ compared with the temperature of the carbon-reducing smelting furnace gas cooled in the second heat exchange, and T2 is not less than T1 and not less than T3. Therefore, the waste heat of the carbon reduction smelting furnace gas can be distributed on the second heat exchange device 5 as much as possible among the first heat exchange device 2, the second heat exchange device 5 and the third heat exchange device 6, the scale of the third heat exchange device 6 is reduced, the structure of the third heat exchange device 6 is simplified, and the cost is reduced.

The temperature of the cooled carbon-reduction smelting furnace gas output by the second heat exchange device can be 120-170 ℃ generally, and the temperature of the cooled carbon-reduction smelting furnace gas output by the third heat exchange device can be below 80 ℃ generally. When the temperature of the second heat exchange cooled carbon-reduced smelting furnace gas output by the second heat exchange device is 120-170 ℃, tar in the second heat exchange cooled carbon-reduced smelting furnace gas (if the second heat exchange cooled carbon-reduced smelting furnace gas contains gaseous coal dry distillation products) is not separated out yet, so that the stable operation and the heat exchange efficiency of the second heat exchange device 5 can be better ensured.

In addition, the carbon reduction smelting furnace gas purification and utilization system of the embodiment may further include a tar trapping device 7 for receiving the cooled carbon reduction smelting furnace gas of the third heat exchange and then outputting the cooled carbon reduction smelting furnace gas of the third heat exchange after tar trapping; the gas storage device 10 is configured to receive the cooled carbon-reduced smelting furnace gas after the tar is captured, and then transmit the carbon monoxide stored in the gas storage device 10 to a gas heat energy utilization system. The tar trap 7 is also called a coke trap and is an existing device.

The system for purifying and utilizing carbon-reducing smelting furnace gas of the above embodiment may further include a desulfurizing device 9, and the desulfurizing device 9 is preferably disposed at an inlet of the second heat-exchanged cooled carbon-reducing smelting furnace gas (or the third heat-exchanged cooled carbon-reducing smelting furnace gas) of the gas storage device 10. The desulfurization unit 9 is also an existing equipment.

The fan 8 of the system for purifying and utilizing a carbon-reducing smelting furnace gas according to the above embodiment is preferably provided between the tar trap 7 and the desulfurizer 9.

In addition, the carbon reduction smelting furnace gas purification and utilization system of the above embodiment may further include a smelting raw material drying system, the smelting raw material drying system includes a smelting raw material drying device 14 and a tail gas dust removal device 15, the smelting raw material drying device 14 is configured to receive the cooled waste gas (from the exhaust-heat boiler 12, the temperature is usually not lower than 100 ℃) and the smelting raw material to be fed into the industrial kiln 1, and output tail gas after drying the smelting raw material through the cooled waste gas, and the tail gas dust removal device 15 is configured to receive the tail gas, perform dust removal processing, and then discharge the tail gas.

The carbon reduction smelting furnace gas purification and utilization system of the above embodiment may further include a diffusing device, which is disposed on the carbon reduction smelting furnace gas discharge passage between the industrial kiln 1 and the first heat exchange device 2, so as to perform emergency diffusion.

The filter element of the filtering and dust removing device 4 can adopt a metal filter element or a ceramic filter element. The filtering and dust removing device 4 can reduce the dust content of the carbon reduction smelting furnace gas to 100mg/Nm ³ 、50mg/Nm ³ 、20mg/Nm ³ 、10mg/Nm ³ Or 5mg/Nm ³ The following filtering and dust removing device. Generally, the dust content of the dedusted carbon reduction smelting furnace gas output by the filtering and dedusting device 4 can reach corresponding indexes by selecting filter elements with different filtering efficiencies. In addition, a pre-dust-removing device 3 may be disposed at the front end of the filtering dust-removing device 4, and a mechanical dust remover, such as a cyclone dust remover and a gravity dust remover, may be generally adopted as the pre-dust-removing device 3, so as to reduce the workload of the filtering dust-removing device 4.

FIG. 2 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application. Referring to fig. 2, a system for purifying and utilizing carbon reduction smelting furnace gas refers to industrial furnace gas which is discharged from an industrial furnace 1 for extracting required substances from minerals by a pyrogenic process using a carbon reducing agent and mainly contains carbon monoxide, for example, the industrial furnace 1 may be a silicomanganese smelting submerged arc furnace, a high-carbon ferromanganese smelting submerged arc furnace, a nickel iron smelting submerged arc furnace, a high-titanium slag smelting submerged arc furnace, a calcium carbide smelting submerged arc furnace, or the like. The silicomanganese smelting ore-smelting furnace is characterized in that substances required for refining are silicomanganese alloy, the high-carbon ferromanganese smelting ore-smelting furnace is characterized in that substances required for refining are high-carbon ferromanganese, and the like. Referring to fig. 2, the carbon reduction smelting furnace gas purification and utilization system comprises a first heat exchange device 2, a filtering and dust removal device 4, a second heat exchange device 5, a gas storage device 10 and a fuel gas heat energy utilization system. The first heat exchange device 2 is used for receiving the carbon reduction smelting furnace gas and the first heat exchange simulated heating medium and then respectively outputting first heat exchange cooled carbon reduction smelting furnace gas and the first heat exchange heated medium; the filtering and dust removing device 4 is used for receiving the first heat exchange cooled carbon reduction smelting furnace gas and then outputting the dust-removed carbon reduction smelting furnace gas, and the filtering and dust removing device 4 physically intercepts dust in the first heat exchange cooled carbon reduction smelting furnace gas through a filter element; the second heat exchange device 5 is used for receiving the dedusted carbon reduction smelting furnace gas and the second heat exchange pseudo-heating medium and then respectively outputting the second heat exchange cooled carbon reduction smelting furnace gas and the second heat exchange heated medium; the gas storage device 10 is used for receiving the second heat-exchange cooled carbon-reduced smelting furnace gas and then transmitting the carbon monoxide stored in the gas storage device to a gas heat energy utilization system; the gas heat energy utilization system comprises a gas turbine 11, a waste heat boiler 12 and a steam turbine 13 which are connected in sequence, wherein the gas turbine 11 is used for receiving the carbon monoxide which is taken as the gas turbine operation fuel from the gas storage device 10 and then respectively outputs first electric energy and waste gas, the waste heat boiler 12 is used for receiving the waste gas and the evaporation water and then respectively outputs cooled waste gas and steam, and the steam turbine 13 is used for receiving the steam and outputting second electric energy. Specifically, in this embodiment, the first heat exchanger 2 is a partition wall heat exchanger, the second heat exchanger 5 is a waste heat boiler, the first heat exchange medium to be heated is hot water, the second heat exchange medium to be heated is steam, the first heat exchange medium to be heated is output to the second heat exchanger 5 as the second heat exchange medium to be heated, both the second heat exchange medium to be heated and the steam output by the waste heat boiler 12 are output to the steam turbine 13, and the steam turbine 13 outputs the second electric energy by using the steam. In addition, the gas storage device 10 may be a gas tank (the structure is the same as the gas tank).

The carbon reduction smelting furnace gas purification and utilization system of the embodiment has the following operation process: the industrial kiln 1 operates and outputs carbon-reducing smelting furnace gas, and the first heat exchange device 2 receives the carbon-reducing smelting furnace gas and the first heat exchange pseudo-heating medium, and then exchanges heat between the carbon-reducing smelting furnace gas and the first heat exchange pseudo-heating medium so as to respectively output the first heat exchange cooled carbon-reducing smelting furnace gas and the first heat exchange heated medium (hot water). Here, the first heat exchanging device 2 utilizes a part of heat of the carbon-reducing smelting furnace gas, and meanwhile, because the temperature of the carbon-reducing smelting furnace gas output by the industrial kiln 1 is high (the upper temperature limit can reach 600 ℃ -900 ℃), the temperature of the carbon-reducing smelting furnace gas cooled by the first heat exchanging device 2 is reduced after the carbon-reducing smelting furnace gas passes through the first heat exchanging device 2, so that the temperature requirement of the subsequent filtering and dust removing device 4 is met, and the damage of key parts such as a filter element in the filtering and dust removing device 4 is avoided. And then, the first heat exchange is fed into the filtering and dedusting device 4 by the cooling carbon reduction smelting furnace gas, and the filtering and dedusting device 4 physically intercepts dust in the first heat exchange by the cooling carbon reduction smelting furnace gas through the filter element, so that the first heat exchange is dedusted by the cooling carbon reduction smelting furnace gas, and the dedusted carbon reduction smelting furnace gas is output. Because the dust content in the dedusted carbon reduction smelting furnace gas is reduced, the second heat exchange device 5 can operate stably for a long time, and the heat exchange efficiency of the second heat exchange device 5 can be improved. And then, the dedusted carbon-reducing smelting furnace gas enters a second heat exchange device 5, and the second heat exchange device 5 receives the dedusted carbon-reducing smelting furnace gas and a second heat exchange pseudo-heating medium, and then performs heat exchange between the dedusted carbon-reducing smelting furnace gas and the second heat exchange pseudo-heating medium so as to respectively output a second heat exchange cooled carbon-reducing smelting furnace gas and a second heat exchange heated medium (steam). After that, the second heat exchange is cooled, the carbon reduction smelting furnace gas enters the gas storage device 10, and the gas storage device 10 transmits the stored carbon monoxide to the gas heat energy utilization system. In the gas heat energy utilization system, the gas turbine 11 receives the carbon monoxide as the gas turbine operation fuel from the gas storage device 10 and then outputs the first electric energy and the exhaust gas, respectively, the exhaust heat boiler 12 receives the exhaust gas and the evaporation water (typically soft water) and then outputs the cooled exhaust gas and the steam, respectively, and the steam turbine 13 receives the steam (from the second heat exchange device 5 and the exhaust heat boiler 12, respectively) and outputs the second electric energy. Therefore, the system for purifying and utilizing the carbon reduction smelting furnace gas can improve the utilization efficiency of sensible heat and latent heat of the carbon reduction smelting furnace gas.

As an alternative scheme of the carbon-reducing smelting furnace gas purification and utilization system of the above embodiment, if it is assumed that the temperature of the carbon-reducing smelting furnace gas cooled by the first heat exchange is reduced by T1 ℃ compared with the temperature of the carbon-reducing smelting furnace gas, and the temperature of the carbon-reducing smelting furnace gas cooled by the second heat exchange is reduced by T2 ℃ compared with the temperature of the carbon-reducing smelting furnace gas cooled by the first heat exchange, T2 is greater than or equal to T1.

In the carbon reduction smelting furnace gas purification and utilization system of the above embodiment, generally speaking, the temperature of the cooled carbon reduction smelting furnace gas output by the first heat exchange device is 400 ℃ to 500 ℃.

As an alternative to the carbon-reducing smelting furnace gas purification and utilization system of the above embodiment, the first heat exchange device has a flow rate adjustment component that can adjust the flow rate of the first heat exchange pseudo-heating medium according to the temperature of the first heat exchange heated medium.

In a preferred embodiment, if the temperature of the carbon-reducing smelting furnace gas cooled in the first heat exchange is decreased by T1 ℃ compared with the temperature of the carbon-reducing smelting furnace gas, the temperature of the carbon-reducing smelting furnace gas cooled in the second heat exchange is decreased by T2 ℃ compared with the temperature of the carbon-reducing smelting furnace gas cooled in the first heat exchange, the temperature of the carbon-reducing smelting furnace gas cooled in the third heat exchange is decreased by T3 ℃ compared with the temperature of the carbon-reducing smelting furnace gas cooled in the second heat exchange, and T2 is not less than T1 and not less than T3.

The temperature of the cooled carbon-reduction smelting furnace gas output by the second heat exchange device can be 120-170 ℃ generally, and the temperature of the cooled carbon-reduction smelting furnace gas output by the third heat exchange device can be below 80 ℃ generally.

In addition, the carbon-reducing smelting furnace gas purification and utilization system of the above embodiment may further include a tar trap device 7 for receiving the third heat-exchanged cooled carbon-reducing smelting furnace gas and then outputting the third heat-exchanged cooled carbon-reducing smelting furnace gas after tar trap; the gas storage device 10 is configured to receive the cooled carbon-reduced smelting furnace gas after the tar is captured, and then transmit the carbon monoxide stored in the gas storage device 10 to a gas heat energy utilization system.

The fan 8 of the system for purifying and utilizing carbon-reducing smelting furnace gas according to the above embodiment is preferably provided between the tar trap 7 and the desulfurizer 9.

The filter element of the filtering and dust removing device 4 can adopt a metal filter element or a ceramic filter element. The filtering and dust removing device 4 can reduce the dust content of the carbon reduction smelting furnace gas to 100mg/Nm ³ 、50mg/Nm ³ 、20mg/Nm ³ 、10mg/Nm ³ Or 5mg/Nm ³ The following filtering and dust removing device. In addition, a pre-dust-removing device 3 can be arranged at the front end of the filtering and dust-removing device 4.

FIG. 3 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application. As shown in fig. 3, a system for purifying and utilizing carbon reduction smelting furnace gas refers to industrial furnace gas which is discharged from an industrial furnace 1 for extracting required substances from minerals by a pyrogenic process using a carbon reducing agent and mainly contains carbon monoxide, for example, the industrial furnace 1 may be a silicomanganese smelting submerged arc furnace, a high-carbon ferromanganese smelting submerged arc furnace, a nickel iron smelting submerged arc furnace, a high-titanium slag smelting submerged arc furnace, a calcium carbide smelting submerged arc furnace, or the like. The silicomanganese smelting ore-smelting furnace is characterized in that substances required for refining are silicomanganese alloy, the high-carbon ferromanganese smelting ore-smelting furnace is characterized in that substances required for refining are high-carbon ferromanganese, and the like. Referring to fig. 3, the carbon reduction smelting furnace gas purification and utilization system comprises a first heat exchange device 2, a filtering and dust removal device 4, a second heat exchange device 5, a gas storage device 10 and a fuel gas heat energy utilization system. The first heat exchange device 2 is used for receiving the carbon reduction smelting furnace gas and the first heat exchange simulated heating medium and then respectively outputting first heat exchange cooled carbon reduction smelting furnace gas and the first heat exchange heated medium; the filtering and dust removing device 4 is used for receiving the first heat exchange cooled carbon reduction smelting furnace gas and then outputting the dust-removed carbon reduction smelting furnace gas, and the filtering and dust removing device 4 physically intercepts dust in the first heat exchange cooled carbon reduction smelting furnace gas through a filter element; the second heat exchange device 5 is used for receiving the dedusted carbon reduction smelting furnace gas and the second heat exchange pseudo-heating medium and then respectively outputting the second heat exchange cooled carbon reduction smelting furnace gas and the second heat exchange heated medium; the gas storage device 10 is used for receiving the second heat-exchange cooled carbon-reduced smelting furnace gas and then transmitting the carbon monoxide stored in the gas storage device to a gas heat energy utilization system; the gas heat energy utilization system comprises a gas turbine 11, a waste heat boiler 12 and a steam turbine 13 which are connected in sequence, wherein the gas turbine 11 is used for receiving the carbon monoxide which is taken as the gas turbine operation fuel and is received by the gas storage device 10, then the carbon monoxide outputs first electric energy and waste gas respectively, the waste heat boiler 12 is used for receiving the waste gas and evaporation water and then outputs the cooled waste gas and steam respectively, and the steam turbine 13 is used for receiving the steam and outputting second electric energy. Specifically, in this embodiment, the first heat exchange device 2 is a partition wall heat exchanger, the second heat exchange device 5 is a partition wall heat exchanger, and when both the first heat exchange heated medium and the second heat exchange heated medium are hot water, both the first heat exchange heated medium and the second heat exchange heated medium are output to the waste heat boiler 12 as the evaporation water. The gas storage device 10 may be a gas tank (the structure is the same as that of the gas tank).

The carbon reduction smelting furnace gas purification and utilization system of the embodiment has the following operation process: the industrial kiln 1 operates and outputs carbon-reducing smelting furnace gas, and the first heat exchange device 2 receives the carbon-reducing smelting furnace gas and the first heat exchange pseudo-heating medium, and then exchanges heat between the carbon-reducing smelting furnace gas and the first heat exchange pseudo-heating medium so as to respectively output the first heat exchange cooled carbon-reducing smelting furnace gas and the first heat exchange heated medium (hot water). Here, the first heat exchange device 2 not only utilizes a part of heat of the carbon reduction smelting furnace gas, but also reduces the temperature of the carbon reduction smelting furnace gas output by the industrial kiln 1 after passing through the first heat exchange device 2 because the temperature of the carbon reduction smelting furnace gas is high (the upper temperature limit can reach 600 ℃ -900 ℃), so that the temperature requirement of the subsequent filtering and dust removing device 4 is met, and the damage of key parts such as a filter element in the filtering and dust removing device 4 is avoided. And then, the first heat exchange carbon reduction smelting furnace gas enters a filtering and dedusting device 4, and the filtering and dedusting device 4 physically intercepts dust in the first heat exchange carbon reduction smelting furnace gas through a filter element, so that the first heat exchange carbon reduction smelting furnace gas is dedusted, and the dedusted carbon reduction smelting furnace gas is output. Because the dust content in the dedusted carbon reduction smelting furnace gas is reduced, the second heat exchange device 5 can operate stably for a long time, and meanwhile, the heat exchange efficiency of the second heat exchange device 5 can be improved. And then, the dedusted carbon-reducing smelting furnace gas enters a second heat exchange device 5, and the second heat exchange device 5 receives the dedusted carbon-reducing smelting furnace gas and a second heat exchange pseudo-heating medium, and then performs heat exchange between the dedusted carbon-reducing smelting furnace gas and the second heat exchange pseudo-heating medium so as to respectively output a second heat exchange cooled carbon-reducing smelting furnace gas and a second heat exchange heated medium (hot water). After that, the second heat exchange is cooled, the carbon reduction smelting furnace gas enters the gas storage device 10, and the gas storage device 10 transmits the stored carbon monoxide to the gas heat energy utilization system. In the gas heat energy utilization system, a gas turbine 11 receives carbon monoxide from the gas storage device 10 as a gas turbine operation fuel and then outputs first electric energy and exhaust gas, respectively, a waste heat boiler 12 receives the exhaust gas and evaporation water (typically soft water, from the first heat exchange device 2 and the second heat exchange device 5, respectively) and then outputs cooled exhaust gas and steam, respectively, and a steam turbine 13 receives the steam (from the waste heat boiler 12) and outputs second electric energy. Therefore, the system for purifying and utilizing the carbon reduction smelting furnace gas can improve the utilization efficiency of sensible heat and latent heat of the carbon reduction smelting furnace gas.

In the system for purifying and utilizing carbon-reducing smelting furnace gas in the above embodiment, generally, the temperature of the cooled carbon-reducing smelting furnace gas output by the first heat exchange device is 400 ℃ to 500 ℃.

As an alternative to the carbon-reduction smelting furnace gas purification and utilization system of the above embodiment, the first heat exchange device has a flow rate adjustment component, and the flow rate adjustment component can adjust the flow rate of the first heat exchange pseudo-heating medium according to the temperature of the first heat exchange heated medium.

As an improvement, the carbon-reducing smelting furnace gas purification and utilization system of the above embodiment may further include a third heat exchange device 6, configured to receive the second heat-exchanged cooled carbon-reducing smelting furnace gas and the third heat-exchange pseudo-heating medium, and then output the third heat-exchanged cooled carbon-reducing smelting furnace gas and the third heat-exchange heated medium, respectively. At this time, the gas storage device 10 is used for receiving the third heat-exchanged cooled carbon-reduced smelting furnace gas and then delivering the carbon monoxide stored in the gas storage device 10 to a gas heat energy utilization system. In this embodiment, the third heat exchange device 6 employs a partition wall heat exchanger.

In a preferred embodiment, the medium to be heated in the third heat exchange is hot water, and the medium to be heated in the third heat exchange is output to the waste heat boiler 12 as the evaporation water.

In addition, the carbon-reducing smelting furnace gas purification and utilization system of the above embodiment may further include a tar trap device 7 for receiving the third heat-exchanged cooled carbon-reducing smelting furnace gas and then outputting the third heat-exchanged cooled carbon-reducing smelting furnace gas after tar trap; the gas storage device 10 is configured to receive the carbon-reduced smelting furnace gas from the cooled carbon after the tar is captured, and then output the carbon monoxide stored in the gas storage device 10 to a gas heat energy utilization system.

In addition, the carbon reduction smelting furnace gas purification and utilization system of the above embodiment may further include a smelting raw material drying system, the smelting raw material drying system includes a smelting raw material drying device 14 and a tail gas dust removal device 15, the smelting raw material drying device 14 is configured to receive the cooled waste gas (from the waste heat boiler 12, the temperature is usually not lower than 100 ℃) and the smelting raw material that is about to enter the industrial kiln 1, dry the smelting raw material through the cooled waste gas, and output tail gas, and the tail gas dust removal device 15 is configured to receive the tail gas, perform dust removal treatment, and then discharge the tail gas.

FIG. 4 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application. As shown in fig. 4, a system for purifying and utilizing carbon reduction smelting furnace gas refers to industrial furnace gas which is discharged from an industrial furnace 1 for extracting required substances from minerals by a pyrogenic process using a carbon reducing agent and mainly contains carbon monoxide, for example, the industrial furnace 1 may be a silicomanganese smelting submerged arc furnace, a high-carbon ferromanganese smelting submerged arc furnace, a nickel iron smelting submerged arc furnace, a high-titanium slag smelting submerged arc furnace, a calcium carbide smelting submerged arc furnace, or the like. The silicon-manganese smelting submerged arc furnace can extract the needed substances as silicon-manganese alloy, the high-carbon ferromanganese smelting submerged arc furnace can extract the needed substances as high-carbon ferromanganese, and the like. Referring to fig. 4, the carbon reduction smelting furnace gas purification and utilization system comprises a first heat exchange device 2, a filtering and dust removal device 4, a second heat exchange device 5, a gas storage device 10 and a fuel gas heat energy utilization system. The first heat exchange device 2 is used for receiving the carbon reduction smelting furnace gas and the first heat exchange simulated heating medium and then respectively outputting first heat exchange cooled carbon reduction smelting furnace gas and the first heat exchange heated medium; the filtering and dust removing device 4 is used for receiving the first heat exchange cooled carbon reduction smelting furnace gas and then outputting the dust-removed carbon reduction smelting furnace gas, and the filtering and dust removing device 4 physically intercepts dust in the first heat exchange cooled carbon reduction smelting furnace gas through a filter element; the second heat exchange device 5 is used for receiving the dedusted carbon reduction smelting furnace gas and the second heat exchange pseudo-heating medium and then respectively outputting the second heat exchange cooled carbon reduction smelting furnace gas and the second heat exchange heated medium; the gas storage device 10 is used for receiving the second heat-exchange cooled carbon-reduced smelting furnace gas and then transmitting the carbon monoxide stored in the gas storage device to a gas heat energy utilization system; the gas-fired heat energy utilization system comprises a gas-fired boiler 16, and the gas-fired boiler 16 is used for receiving carbon monoxide from the gas storage device 10 and combusting the carbon monoxide to heat a secondary heating medium containing the first heat-exchange heated medium and/or the second heat-exchange heated medium and then respectively outputting exhaust gas and the secondary heated medium. Specifically, in the present embodiment, the first heat exchange device 2 employs a partition wall heat exchanger, the second heat exchange device 5 employs a partition wall heat exchanger, both the first heat exchange heated medium and the second heat exchange heated medium are hot water, and both the first heat exchange heated medium and the second heat exchange heated medium are output to the gas boiler 16 as the evaporation water. The gas storage device 10 may be a gas tank (the structure is the same as that of the gas tank).

The carbon reduction smelting furnace gas purification and utilization system of the embodiment has the following operation process: the industrial kiln 1 operates and outputs carbon-reducing smelting furnace gas, and the first heat exchange device 2 receives the carbon-reducing smelting furnace gas and the first heat exchange pseudo-heating medium, and then exchanges heat between the carbon-reducing smelting furnace gas and the first heat exchange pseudo-heating medium so as to respectively output the first heat exchange cooled carbon-reducing smelting furnace gas and the first heat exchange heated medium (hot water). Here, the first heat exchange device 2 not only utilizes a part of heat of the carbon reduction smelting furnace gas, but also reduces the temperature of the carbon reduction smelting furnace gas output by the industrial kiln 1 after passing through the first heat exchange device 2 because the temperature of the carbon reduction smelting furnace gas is high (the upper temperature limit can reach 600 ℃ -900 ℃), so that the temperature requirement of the subsequent filtering and dust removing device 4 is met, and the damage of key parts such as a filter element in the filtering and dust removing device 4 is avoided. And then, the first heat exchange is fed into the filtering and dedusting device 4 by the cooling carbon reduction smelting furnace gas, and the filtering and dedusting device 4 physically intercepts dust in the first heat exchange by the cooling carbon reduction smelting furnace gas through the filter element, so that the first heat exchange is dedusted by the cooling carbon reduction smelting furnace gas, and the dedusted carbon reduction smelting furnace gas is output. Because the dust content in the dedusted carbon reduction smelting furnace gas is reduced, the second heat exchange device 5 can operate stably for a long time, and meanwhile, the heat exchange efficiency of the second heat exchange device 5 can be improved. After that, the dedusted carbon-reducing smelting furnace gas enters a second heat exchange device 5, and the second heat exchange device 5 receives the dedusted carbon-reducing smelting furnace gas and a second heat exchange pseudo-heating medium, and then carries out heat exchange between the dedusted carbon-reducing smelting furnace gas and the second heat exchange pseudo-heating medium, so as to respectively output a second heat exchange cooled carbon-reducing smelting furnace gas and a second heat exchange heated medium (hot water). After that, the second heat exchange is cooled, the carbon reduction smelting furnace gas enters the gas storage device 10, and the gas storage device 10 transmits the stored carbon monoxide to the gas heat energy utilization system. In a gas thermal energy utilization system, a gas boiler 16 receives carbon monoxide from the gas storage device 10 and combusts the carbon monoxide to heat hot water from the first heat exchange device 2 and the second heat exchange device 5 and then outputs exhaust gas and steam, respectively, wherein the steam can be used for heating or production or can be output to a steam turbine, and the steam turbine receives the steam and outputs electric energy. Therefore, the carbon reduction smelting furnace gas purification and utilization system of the embodiment can improve the utilization efficiency of sensible heat and latent heat of the carbon reduction smelting furnace gas.

In the system for purifying and utilizing carbon-reducing smelting furnace gas according to the above embodiment, generally speaking, if the temperature of the carbon-reducing smelting furnace gas cooled by the first heat exchange is decreased by T1 ℃ compared with the temperature of the carbon-reducing smelting furnace gas, and the temperature of the carbon-reducing smelting furnace gas cooled by the second heat exchange is decreased by T2 ℃ compared with the temperature of the carbon-reducing smelting furnace gas cooled by the first heat exchange, then T1 is 100 ℃ to 450 ℃ and T2 is 200 ℃ to 450 ℃.

In a preferred embodiment, the third heat exchange heated medium is hot water, and the third heat exchange heated medium is output to the gas boiler 16 as the evaporation water.

In addition, the carbon reduction smelting furnace gas purification and utilization system of the embodiment may further include a tar trapping device 7 for receiving the cooled carbon reduction smelting furnace gas of the third heat exchange and then outputting the cooled carbon reduction smelting furnace gas of the third heat exchange after tar trapping; the gas storage device 10 is configured to receive the cooled carbon-reduced smelting furnace gas after the tar is captured, and then transmit the carbon monoxide stored in the gas storage device 10 to a gas heat energy utilization system.

In addition, the carbon reduction smelting furnace gas purification and utilization system of the above embodiment may further include a smelting raw material drying system, the smelting raw material drying system includes a smelting raw material drying device 14 and a tail gas dust removal device 15, the smelting raw material drying device 14 is configured to receive waste gas (from a gas boiler 16, the temperature is usually not lower than 100 ℃) and smelting raw material to be fed into the industrial kiln 1, and output tail gas after drying the smelting raw material through the cooled waste gas, and the tail gas dust removal device 15 is configured to receive the tail gas, perform dust removal processing, and then discharge the tail gas.

FIG. 5 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application. As shown in FIG. 5, the system for cleaning and utilizing carbon-reducing smelting furnace gas of this embodiment differs from the system for cleaning and utilizing carbon-reducing smelting furnace gas shown in FIG. 4 in that: the second heat exchange device 5 adopts a waste heat boiler, and correspondingly, the second heat exchange is carried out on heated medium steam. In addition, the heated medium of the third heat exchange is hot water, and the heated medium of the third heat exchange is output to the second heat exchange device 5 as the second heat exchange pseudo-heating medium.

FIG. 6 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application. As shown in FIG. 6, the purification and utilization system for carbon-reducing smelting furnace gas of this embodiment differs from the purification and utilization system for carbon-reducing smelting furnace gas shown in FIG. 1 in that: the gas turbine 11 and the waste heat boiler 12 are eliminated, the steam output by the first heat exchange heated medium and the second heat exchange heated medium is output to the steam turbine 13, and the steam turbine 13 outputs electric energy by using the steam; in addition, the gas storage device 10 is used for conveying the stored carbon monoxide to a chemical product factory, the chemical product factory and implementation the carbon reduction smelting furnace gas purification factory for purifying the carbon reduction smelting furnace gas belongs to the same industrial park or does not belong to the same industrial park but is connected through a gas transmission pipe network, a chemical product production system 17 is arranged in the chemical product factory, and the chemical product production system 17 is used for receiving the carbon monoxide from the gas storage device 10 and producing the carbon monoxide as a raw material to obtain a chemical product. Wherein, the chemical products can be any one or more of formic acid, formate, acetic acid, acetate, methanol, formaldehyde, glycol and synthetic ammonia products.

Generally speaking, the chemical product factory can be with implement the carbon reduction smelting burner gas clean-up factory that carbon reduction smelting burner gas purified belongs to same industry garden in, can realize the hot stove metallurgical industry in ore deposit and the focus of carbon base product synthesis (carbon chemical industry) industry like this, can not only very big realization carbon emission reduction (a large amount of carbon monoxide that the hot stove metallurgical industry in ore deposit produced is used for carbon one chemical industry to turn into carbon base product nearby), the transport of the carbon monoxide of being convenient for in addition also provides a novel mode for government's industry planning.

In addition, as shown in fig. 6, the carbon-reduction smelting furnace gas purification and utilization system of this embodiment also divides the carbon monoxide stored in the gas storage device 10, receives one path of the divided carbon monoxide as fuel through the gas boiler 18 to output exhaust gas and steam respectively, and then uses the exhaust gas to dry the smelting raw materials to be fed into the industrial furnace. The metallurgical raw material drying system for drying the metallurgical raw material to be introduced into the industrial kiln using the exhaust gas is the same as the carbon-reducing metallurgical furnace gas cleaning and utilizing system shown in FIG. 1.

FIG. 7 is a schematic structural diagram of a system for purifying and utilizing carbon-reducing smelting furnace gas according to an embodiment of the present application. As shown in FIG. 7, the system for purifying and utilizing carbon-reducing smelting furnace gas of this embodiment is substantially the same as the system for purifying and utilizing carbon-reducing smelting furnace gas shown in FIG. 6, but differs therefrom in that: the manner of purifying and cooling the carbon-reducing smelting furnace gas (i.e., the flow before the gas storage device 10) is the same as the manner of purifying and cooling the carbon-reducing smelting furnace gas in the carbon-reducing smelting furnace gas purification and utilization system shown in FIG. 2.

FIG. 8 is a system for cleaning and utilizing yellow phosphorus furnace gas according to an embodiment of the present application. A system for purifying and utilizing yellow phosphorus furnace gas which is discharged from an industrial furnace 1 for extracting yellow phosphorus from phosphorite by a fire method by using a carbon reducing agent and the gas phase mainly comprises gaseous yellow phosphorus and carbon monoxide, for example, the industrial furnace 1 can be a large self-baking electrode phosphorus-making electric furnace or a multi-electrode phosphorus-making electric furnace. Referring to fig. 8, the yellow phosphorus furnace gas purification and utilization system includes a dust removal device, a yellow phosphorus condensation and recovery device 19, and a gas storage device 10. The dust removal device is used for receiving the yellow phosphorus furnace gas and then outputting the dust-removed yellow phosphorus furnace gas; the yellow phosphorus condensation recovery device 19 is used for receiving the dedusted yellow phosphorus furnace gas and then respectively outputting the condensed recovered yellow phosphorus and the cooled gas; the gas storage device 10 is used for receiving the cooled gas and then delivering the carbon monoxide stored in the gas storage device 10 to a chemical product factory, the chemical product factory and a yellow phosphorus furnace gas purification factory for implementing yellow phosphorus furnace gas purification belong to the same industrial park or do not belong to the same industrial park but are connected through a gas delivery pipe network, a chemical product production system 17 is arranged in the chemical product factory, and the chemical product production system 17 is used for receiving the carbon monoxide from the gas storage device and producing the carbon monoxide as a raw material to obtain a chemical product. Wherein, the chemical products can be any one or more of formic acid, formate, acetic acid, acetate, methanol, formaldehyde, glycol and synthetic ammonia products.

Generally speaking, the chemical product factory can belong to same industrial park with the implementation yellow phosphorus burner gas clean-up factory that yellow phosphorus burner gas purified belongs to, can realize the concentration of electric stove method yellow phosphorus production industry and carbon base product synthesis (carbon chemical industry) industry like this, can not only very big realization carbon emission reduction (a large amount of carbon monoxide that the hot stove metallurgical industry of ore deposit produced is used for carbon chemical industry nearby and turns into carbon base product), and the transport of the carbon monoxide of being convenient for in addition also provides a novel mode for government's industry planning. According to statistics, the electric furnace method yellow phosphorus production process can generate tail gas of about 2500-3000 cubic meters every ton of yellow phosphorus is obtained, and the main component in the tail gas is carbon monoxide with the volume percentage content of 85-92%, so that according to measurement and calculation, when a yellow phosphorus furnace gas purification plant area for implementing yellow phosphorus furnace gas purification is configured to correspond to the yield of condensed and recovered yellow phosphorus to be more than or equal to 2 ten thousand tons per year, a corresponding chemical product production system can generate relatively ideal economic benefit.

In the yellow phosphorus furnace gas purification and utilization system of the embodiment, the dust removal device is preferably a filtering dust removal deviceAnd 4, physically intercepting dust in the yellow phosphorus furnace gas by the filter dust removal device 4 through a filter element. The filtering and dust removing device 4 generally has higher dust removing efficiency, so that the sludge phosphorus generated by the yellow phosphorus condensation and recovery device 19 can be greatly reduced, and the purity of the yellow phosphorus condensed and recovered is improved. The filter element can adopt a metal filter element or a ceramic filter element. In addition, the dust filtering and removing device 4 can be used for reducing the dust content of the dedusted carbon reduction smelting furnace gas to 100mg/Nm ³ 、50mg/Nm ³ 、20mg/Nm ³ 、10mg/Nm ³ Or 5mg/Nm ³ The following filtering and dust removing device.

In a preferred embodiment of the yellow phosphorus furnace gas purification and utilization system of the above embodiment, the yellow phosphorus furnace gas purification and utilization system further includes a diffusing device 20, and the diffusing device 20 is disposed between the yellow phosphorus condensation and recovery device 19 and the gas storage device 10, and is used for discharging the cooled gas when the cooled gas does not meet the condition of entering the gas storage device. The cooled gas may be vented when conditions are not met for entry into the gas storage device.

The condition may include a first condition, where the first condition is whether the chemical product production system receives carbon monoxide, if so, the first condition is met, otherwise, the first condition is not met; additionally, the conditions may include a second condition that is whether the carbon monoxide storage capacity in the gas storage device is above a set threshold (indicating that the gas storage device capacity has reached a peak or near peak value), the second condition is not met, otherwise the second condition is met. When the conditions include both the first condition and the second condition, the cooled gas may be considered to be eligible for entry into the gas storage device if the first condition and/or the second condition are/is met; if neither the first condition nor the second condition is met, the cooled gas may be deemed to be not meeting the conditions for entry into the gas storage device.

In a preferred embodiment of the yellow phosphorus furnace gas purification and utilization system of the above embodiment, the yellow phosphorus furnace gas purification and utilization system further includes a temperature control device (for example, an electric heater) disposed between the industrial kiln 1 and the dust removal device for maintaining the temperature of the dust-removed yellow phosphorus furnace gas above the dew point temperature of the gaseous yellow phosphorus, so as to prevent the dust removal device, especially the filter dust removal device 4, from being contaminated due to condensation of yellow phosphorus and thereby reducing the filtration efficiency.

In a preferred implementation of the yellow phosphorus furnace gas purification and utilization system of the above embodiment, the yellow phosphorus condensation recovery device 19 includes a yellow phosphorus condensation liquid tank, the yellow phosphorus condensation liquid tank is used for storing yellow phosphorus condensate, and the yellow phosphorus condensation recovery device 19 obtains the cooled gas emerging from the liquid surface of the yellow phosphorus condensate by directly contacting the dedusted yellow phosphorus furnace gas with the yellow phosphorus condensate from below the liquid surface of the yellow phosphorus condensate; the yellow phosphorus condensate adopts water. The condensing mode of the gaseous yellow phosphorus can efficiently absorb the gaseous yellow phosphorus and other impurities in the yellow phosphorus furnace gas, thus being beneficial to simplifying the carbon monoxide purification measures in the subsequent chemical product production system 17.

In addition, as shown in fig. 8, the yellow phosphorus furnace gas purification and utilization system of this embodiment also splits the carbon monoxide stored in the gas storage device 10, receives one path of the split carbon monoxide as fuel through the gas boiler 18, and outputs the waste gas and the steam respectively, and then uses the waste gas to dry the smelting raw material to be fed into the industrial furnace 1. The metallurgical raw material drying system for drying the metallurgical raw material to be introduced into the industrial kiln using the exhaust gas is the same as the carbon-reducing metallurgical furnace gas cleaning and utilizing system shown in FIG. 1.

The contents related to the present application are explained above. Those of ordinary skill in the art will be able to implement the present application based on these descriptions. All other embodiments made by those skilled in the art without any inventive step based on the above description shall fall within the scope of the present application.

Claims

1. A carbon reduction smelting furnace gas purification and utilization system is characterized in that: the carbon reduction smelting furnace gas is industrial furnace gas which is discharged from an industrial furnace for extracting required substances from minerals by a fire method by using a carbon reducing agent and mainly comprises carbon monoxide in a gas phase; it comprises the following steps:

the first heat exchange device is used for receiving the carbon reduction smelting furnace gas and the first heat exchange simulated heating medium and then respectively outputting the first heat exchange cooled carbon reduction smelting furnace gas and the first heat exchange heated medium;

the filtering and dedusting device is used for receiving the first heat-exchange cooled carbon reduction smelting furnace gas and then outputting the dedusted carbon reduction smelting furnace gas, and the filtering and dedusting device physically intercepts dust in the first heat-exchange cooled carbon reduction smelting furnace gas through a filter element;

the second heat exchange device is used for receiving the dedusted carbon reduction smelting furnace gas and the second heat exchange pseudo-heating medium and then respectively outputting the second heat exchange cooled carbon reduction smelting furnace gas and the second heat exchange heated medium;

the gas storage device is used for receiving the cooled carbon reduction smelting furnace gas subjected to the second heat exchange and then conveying the carbon monoxide stored in the gas storage device to a chemical product production plant, and the chemical product production plant and a carbon reduction smelting furnace gas purification plant for implementing the carbon reduction smelting furnace gas purification belong to the same industrial park or do not belong to the same industrial park but are connected through a gas conveying pipe network;

and the chemical product production system is positioned in the chemical product production plant area and used for receiving the carbon monoxide from the gas storage device and producing the carbon monoxide serving as a raw material to obtain a chemical product.

2. A carbon reduction smelting furnace gas purification and utilization system is characterized in that: the carbon reduction smelting furnace gas is industrial furnace gas which is discharged from an industrial furnace for extracting required substances from minerals by a fire method by using a carbon reducing agent and mainly comprises carbon monoxide in a gas phase; it includes:

the first heat exchange device is used for receiving the carbon reduction smelting furnace gas and then respectively outputting first heat exchange cooled carbon reduction smelting furnace gas and a first heat exchange heated medium;

the second heat exchange device is used for receiving the dedusted carbon reduction smelting furnace gas and then respectively outputting a second heat exchange cooled carbon reduction smelting furnace gas and a second heat exchange heated medium;

and the gas storage device is used for receiving the second heat exchange cooled carbon reduction smelting furnace gas and then delivering the carbon monoxide stored in the gas storage device to a chemical product production plant, the chemical product production plant and the carbon reduction smelting furnace gas purification plant for implementing carbon reduction smelting furnace gas purification belong to the same industrial park or do not belong to the same industrial park but are connected through a gas delivery pipe network, a chemical product production system is arranged in the chemical product production plant, and the chemical product production system is used for receiving the carbon monoxide from the gas storage device and producing the carbon monoxide as a raw material to obtain a chemical product.

3. The system of claim 1 or 2, wherein: the temperature of the first heat-exchange cooled carbon-reducing smelting furnace gas is reduced by T1 ℃ compared with that of the carbon-reducing smelting furnace gas, the temperature of the second heat-exchange cooled carbon-reducing smelting furnace gas is reduced by T2 ℃ compared with that of the first heat-exchange cooled carbon-reducing smelting furnace gas, and T2 is more than or equal to T1; and/or the first heat exchange heated medium is output to the second heat exchange device as the second heat exchange simulated heating medium.

4. The system of claim 1 or 2, wherein: the third heat exchange device is used for receiving the second heat-exchange cooled carbon-reduced smelting furnace gas and the second heat-exchange pseudo-heating medium and then respectively outputting the third heat-exchange cooled carbon-reduced smelting furnace gas and the third heat-exchange heated medium; and the gas storage device is used for receiving the third heat-exchange cooled carbon-reduced smelting furnace gas and then conveying the carbon monoxide stored in the gas storage device to a chemical product production plant.

5. The system of claim 4, wherein: the temperature of the first heat-exchange cooled carbon-reduced smelting furnace gas is reduced by T1 ℃ compared with the temperature of the carbon-reduced smelting furnace gas, the temperature of the second heat-exchange cooled carbon-reduced smelting furnace gas is reduced by T2 ℃ compared with the temperature of the first heat-exchange cooled carbon-reduced smelting furnace gas, the temperature of the third heat-exchange cooled carbon-reduced smelting furnace gas is reduced by T3 ℃ compared with the temperature of the second heat-exchange cooled carbon-reduced smelting furnace gas, and T2 is more than or equal to T1 and more than or equal to T3.

6. The system of claim 4, wherein: the tar trapping device is used for receiving the cooled carbon reduction smelting furnace gas subjected to the third heat exchange and then outputting the cooled carbon reduction smelting furnace gas subjected to the third heat exchange after being trapped by tar; and the gas storage device is used for receiving the cooled carbon-reduced smelting furnace gas subjected to the third heat exchange after the tar is captured and then conveying the carbon monoxide stored in the gas storage device to a chemical product production plant.

7. The system of claim 4, wherein: the temperature of the cooled carbon reduction smelting furnace gas output by the second heat exchange device is 120-170 ℃, and the temperature of the cooled carbon reduction smelting furnace gas output by the third heat exchange device is below 80 ℃.

8. The system of claim 4, wherein: the first heat exchange device adopts a waste heat boiler or a dividing wall heat exchanger, the second heat exchange device adopts a waste heat boiler or a dividing wall heat exchanger, and the third heat exchange device adopts a dividing wall heat exchanger; and/or the first heat exchange heated medium is output to a second heat exchange device as the second heat exchange simulated heating medium; and/or the first heat exchange heated medium is steam or hot water, the second heat exchange heated medium is steam or hot water, and the second heat exchange heated medium is hot water.

9. The system of claim 1 or 2, wherein: the temperature of the first heat-exchange cooled carbon-reduced smelting furnace gas is reduced by T1 ℃ compared with the temperature of the carbon-reduced smelting furnace gas, the temperature of the second heat-exchange cooled carbon-reduced smelting furnace gas is reduced by T2 ℃ compared with the temperature of the first heat-exchange cooled carbon-reduced smelting furnace gas, the temperature of the T1 is a steam turbine with the temperature of 100-450 ℃, and the temperature of the T2 is 200-450 ℃; and/or the temperature of the cooled carbon reduction smelting furnace gas output by the first heat exchange device is 400-500 ℃; and/or the first heat exchange device is provided with a flow regulating component which can regulate the flow of the first heat exchange pseudo-heating medium according to the temperature of the first heat exchange heated medium.

10. The system of claim 1 or 2, wherein: the chemical product comprises any one of formic acid, formate, acetic acid, acetate, methanol, formaldehyde, ethylene glycol and synthetic ammonia products; and/or the industrial kiln is a silicomanganese smelting submerged arc furnace, a high-carbon ferromanganese smelting submerged arc furnace, a ferronickel smelting submerged arc furnace, a high-titanium slag smelting submerged arc furnace or a calcium carbide smelting submerged arc furnace; and/or the industrial furnace is a submerged arc furnace; and/or the filter element is a metal filter element or a ceramic filter element; and/or the dust filtering and removing device can reduce the dust content of the dedusted carbon reduction smelting furnace gas to 100mg/Nm ³ 、50mg/Nm ³ 、20mg/Nm ³ 、10mg/Nm ³ Or 5mg/Nm ³ The following; and/or the desulfurization device is arranged at the inlet of the cooled carbon reduction smelting furnace gas of the second heat exchange of the gas storage device; and/or the gas storage device is a gas cabinet.