CN209802110U - Large submerged arc furnace flue gas treatment system for removing CO - Google Patents
Large submerged arc furnace flue gas treatment system for removing CO Download PDFInfo
- Publication number
- CN209802110U CN209802110U CN201920391803.2U CN201920391803U CN209802110U CN 209802110 U CN209802110 U CN 209802110U CN 201920391803 U CN201920391803 U CN 201920391803U CN 209802110 U CN209802110 U CN 209802110U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- temperature flue
- low
- circular plate
- dust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
the utility model provides a get rid of large-scale ore smelting hot stove flue gas processing system of CO, including the flue gas incineration device, the desulfurization is taken off the round pin device, high temperature flue gas waste heat recovery device, dust collector, remove the CO device, the utility model discloses be provided with the combustion chamber, the combustible substance has the oxygen burning in the combustion chamber to get rid of most combustible substance in original high temperature flue gas, still remain a small amount of combustible substance in the original high temperature flue gas after nevertheless burning, the utility model discloses still be provided with except that the CO ware, it has the copper scrap to remove to fill in the CO ware, remaining CO reduces the copper oxide film on copper scrap surface, with further getting rid of remaining CO in the low-dust normal atmospheric temperature flue gas, in order to discharge the low-dust normal atmospheric air flue gas that will not have CO, reduce CO poison, threat to people, animal in the low-dust normal atmospheric.
Description
Technical Field
the utility model relates to a ferroalloy submerged arc furnace flue gas treatment technical field especially relates to a get rid of large-scale submerged arc furnace flue gas processing system of CO.
Background
The original high-temperature flue gas temperature generated by the large-scale submerged arc furnace is higher than 550 ℃, in the prior art, the original high-temperature flue gas is conveyed to a waste heat boiler to be cooled so as to be cooled into low-temperature flue gas, the cooled low-temperature flue gas is directly conveyed to a chimney, and the low-temperature flue gas is directly discharged to the atmosphere through the chimney, but the temperature of the low-temperature flue gas is still higher and is between 100 ℃ and 200 ℃, and the low-temperature flue gas is directly discharged to the atmosphere, so that a large amount of heat in the low-temperature flue gas is lost, the waste of low-temperature flue gas waste heat resources is caused, and the recycling efficiency of the original high-temperature flue.
In the process of producing ferroalloy in a large-scale submerged arc furnace, for example, raw materials such as silica, semi-coke and the like are used for reaction in the production of ferrosilicon, and CO is a byproduct in the ferroalloy reaction process, so that the original high-temperature flue gas contains more CO, although the flue gas is subjected to desulfurization and denitrification treatment at present, the desulfurization and denitrification treatment process is ineffective on CO, so that the flue gas after desulfurization and denitrification treatment still contains more CO, if the flue gas after desulfurization and denitrification is directly discharged into the atmosphere, the emission of CO in the flue gas exceeds the standard, the CO is a pollutant with strong toxicity to blood and nervous systems, and after carbon monoxide in the atmosphere exceeds the standard, enters human and animal blood through a respiratory system, is combined with hemoglobin in the blood, myoglobin in muscle and ferrous respiratory enzyme to form a reversible combination, and poses a great threat to the health of human and animals.
disclosure of Invention
in view of the above, it is necessary to provide a flue gas treatment system for a large submerged arc furnace for removing CO.
A flue gas treatment system of a large submerged arc furnace for removing CO comprises a flue gas incineration device, a desulfurization and denitration device, a high-temperature flue gas waste heat recovery device, a dust removal device and a CO removal device, wherein one end of the flue gas incineration device is connected with the flue gas output end of the large submerged arc furnace so as to convey original high-temperature flue gas in the flue gas output end of the large submerged arc furnace into the flue gas incineration device, the flue gas incineration device incinerates the original high-temperature flue gas so as to remove combustible substances in the original high-temperature flue gas, one end of the desulfurization and denitration device is connected with the other end of the flue gas incineration device so as to convey the incinerated original high-temperature flue gas into the desulfurization and denitration device so as to enable the incinerated original high-temperature flue gas to be desulfurized and denitrified to become high-temperature flue gas, the other end of the desulfurization and denitration device is connected with one end of the high-, the high-temperature flue gas waste heat recovery device cools high-temperature flue gas to enable the high-temperature flue gas to be cooled into low-temperature flue gas, the other end of the high-temperature flue gas waste heat recovery device is connected with a dust removal device, the dust removal device removes dust from the low-temperature flue gas to enable the low-temperature flue gas to be dedusted into low-dust and low-temperature flue gas, the other end of the dust removal device is connected with one end of a CO removal device to remove CO in the low-dust and low-temperature flue gas, the other end of the CO removal device is connected with an external chimney to convey the low-dust and low-temperature flue gas from which CO is removed into external atmosphere, the flue gas incineration device is a combustion chamber, the desulfurization and denitration device comprises a desulfurization tower and a denitration tower, one end of the desulfurization tower is connected with the other end of the combustion chamber to convey the incinerated original high-temperature flue gas into the, the device comprises a desulfurization tower, a denitration tower, a high-temperature flue gas waste heat recovery device, a waste heat boiler, a CO removal device and a CO removal device, wherein the other end of the desulfurization tower is connected with one end of the denitration tower, the denitration tower carries out denitration treatment on incinerated original high-temperature flue gas, the high-temperature flue gas waste heat recovery device is a waste heat boiler, one end of the waste heat boiler is connected with the other end of the denitration tower, the waste heat boiler cools the high-temperature flue gas so as to heat water in the waste heat boiler into steam, recycling of the high-temperature flue gas waste heat is achieved, the dust removal device is a glass fiber bag type dust remover, one end of the glass fiber bag type dust remover is connected with the other end of the waste heat boiler so as to remove dust particles in the low-.
Preferably, the CO remover comprises a cavity and a supporting unit, the cavity is a rigid cylindrical cavity, the supporting unit is perpendicular to the length direction of the cavity and is fixedly arranged in the cavity, and the supporting unit is provided with a plurality of supporting units.
Preferably, the supporting unit comprises a first circular plate, a second circular plate, a third circular plate and a fourth circular plate, the first circular plate is arranged at one end close to the low-dust normal-temperature flue gas inlet in the cavity, the fourth circular plate is arranged at one end close to the low-dust normal-temperature flue gas outlet in the cavity, the second circular plate and the third circular plate are arranged between the first circular plate and the fourth circular plate, the second circular plate is arranged at the lower end of the first circular plate, the third circular plate is arranged at the lower end of the second circular plate, the upper left end of the first circular plate is a solid plate, a plurality of through holes are formed in the rest plates, the upper right end of the second circular plate is a solid plate, a plurality of through holes are formed in the rest plates, the lower right end of the third circular plate is a solid plate, a plurality of through holes are formed in the rest plates, the lower left end of the fourth circular plate is a solid plate, the remaining plate bodies are provided with a plurality of through holes.
Preferably, the plurality of through holes formed in the first circular plate, the second circular plate, the third circular plate and the fourth circular plate are one or a combination of a square shape, a circular shape, a diamond shape and an octagonal shape.
The utility model discloses be provided with the combustion chamber, carry earlier the original high temperature flue gas that produces large-scale hot stove in the combustion chamber to make the combustible substance in the original high temperature flue gas burn in the combustion chamber, the combustible substance has the oxygen burning in the combustion chamber, with most combustible substance wherein get rid of, still remain a small amount of combustible substance in the original high temperature flue gas after nevertheless burning, still contain a small amount of CO promptly. The utility model discloses still be provided with except that the CO ware, it has the copper scrap to remove to fill in the CO ware, the low dust normal atmospheric temperature flue gas that will contain residual CO is carried to removing the CO ware in, remaining CO carries out the reduction to the copper oxide film on copper scrap surface, so that the copper oxide film is reduced into the copper, with further getting rid of remaining CO in the low dust normal atmospheric temperature flue gas, in order to discharge the low dust normal atmospheric temperature flue gas that will not have CO to the atmosphere, reduce CO in the low dust normal atmospheric temperature flue gas by a wide margin and poison, the threat to people, animal.
in another embodiment, the utility model is further provided with a low-temperature flue gas waste heat recovery device, the low-dust low-temperature flue gas after being dedusted by the glass fiber bag type deduster is conveyed to the refrigerant evaporator, the low-dust low-temperature flue gas exchanges heat with the refrigerant medium inside the refrigerant evaporator, the low-dust low-temperature flue gas becomes low-dust normal-temperature flue gas after releasing heat, the refrigerant medium in the refrigerant evaporator evaporates after absorbing heat, the refrigerant evaporator conveys the evaporated refrigerant medium to the gas-liquid separator, so that the evaporated refrigerant medium is subjected to gas-liquid separation, then the gaseous refrigerant medium is conveyed to the compressor, so that the gaseous refrigerant medium becomes high-temperature high-pressure gaseous refrigerant medium, then the high-temperature high-pressure gaseous refrigerant medium is conveyed to the heat exchanger, so that the high-temperature high-pressure gaseous refrigerant medium exchanges heat with the external cold water source in the heat exchanger, the external cold water source absorbs heat and then becomes hot water, and then the hot water is conveyed to a hot water storage device for use by a production line, so that the low-temperature waste heat is recycled, and if the hot water is conveyed to a waste heat boiler, the waste heat boiler directly heats the hot water into steam, the energy consumption of the waste heat boiler is greatly reduced, and the energy is greatly saved. The utility model discloses be provided with low temperature flue gas waste heat recovery device, the waste heat in the low temperature flue gas is recycled in effectual recovery, the recovery of original high temperature flue gas low temperature waste heat has been realized, greatly reduced the temperature of normal atmospheric temperature flue gas, carry out the desulfurization to original high temperature flue gas simultaneously, denitration treatment, can show the corruption that reduces the high temperature flue gas and cause waste heat boiler in letting in waste heat boiler process, effectively improve waste heat boiler life, reduce waste heat boiler maintenance cost, make simultaneously and discharge to the low dust normal atmospheric temperature flue gas in the atmosphere and do not contain oxysulfide, nitrogen oxide, in order to accord with the environmental protection requirement.
Drawings
FIG. 1 is a schematic diagram of a flue gas treatment system of a large submerged arc furnace for CO removal.
FIG. 2 is a schematic diagram of another embodiment of a large submerged arc furnace flue gas treatment system for CO removal.
Fig. 3 is a schematic structural view of the first circular plate.
Fig. 4 is a schematic view of the structure of the second circular plate.
fig. 5 is a schematic structural view of a third circular plate.
Fig. 6 is a schematic structural view of a fourth circular plate.
In the figure: the system comprises a combustion chamber 11, a first regulating valve 111, a desulfurization tower 21, a denitration tower 22, a waste heat boiler 31, a glass fiber bag type dust collector 41, a refrigerant evaporator 51, a second regulating valve 511, a first temperature sensor 512, a second temperature sensor 513, a gas-liquid separator 52, a compressor 53, a heat exchanger 54, a hot water storage 55, a CO remover 61, a cavity 611, a supporting unit 612, a first circular plate 6121, a second circular plate 6122, a third circular plate 6123 and a fourth circular plate 6124; a large-scale submerged arc furnace 101 and an external chimney 102.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 1, the utility model provides a large-scale submerged arc furnace flue gas treatment system for removing CO, which comprises a flue gas incineration device, a desulfurization and denitration device, a high-temperature flue gas waste heat recovery device, a dust removal device and a CO removal device, wherein one end of the flue gas incineration device is connected with the flue gas output end of a large-scale submerged arc furnace 101 so as to convey original high-temperature flue gas in the flue gas output end of the large-scale submerged arc furnace 101 to the flue gas incineration device, the flue gas incineration device incinerates the original high-temperature flue gas so as to remove combustible substances in the original high-temperature flue gas, one end of the desulfurization and denitration device is connected with the other end of the flue gas incineration device so as to convey the incinerated original high-temperature flue gas to the desulfurization and denitration device so as to enable the incinerated original high-temperature flue gas to become high-temperature flue gas after desulfurization and denitration, the high-temperature flue gas is conveyed into a high-temperature flue gas waste heat recovery device, the high-temperature flue gas waste heat recovery device cools the high-temperature flue gas to enable the high-temperature flue gas to be cooled into low-temperature flue gas, the other end of the high-temperature flue gas waste heat recovery device is connected with one end of a dust removal device, the dust removal device removes dust from the low-temperature flue gas to enable the low-temperature flue gas to be dedusted into low-dust low-temperature flue gas, one end of a CO removal device is connected with the other end of the dust removal device to remove CO in the low-dust low-temperature flue gas, the other end of the CO removal device is connected with an external chimney 102 to convey the low-dust low-temperature flue gas from which CO is removed into the external atmosphere, the flue gas incineration device is a combustion chamber 11, the desulfurization and denitration device comprises a desulfurization tower 21 and a denitration tower 22, one end of the desulfurization tower 21 is connected with, the desulfurization tower 21 carries out desulfurization treatment on the incinerated original high-temperature flue gas, the other end of the desulfurization tower 21 is connected with one end of a denitration tower 22, the denitration tower 22 carries out denitration treatment on the incinerated original high-temperature flue gas, the high-temperature flue gas waste heat recovery device is a waste heat boiler 31, one end of the waste heat boiler 31 is connected with the other end of the denitration tower 22, the waste heat boiler 31 cools the high-temperature flue gas to heat water in the waste heat boiler 31 into steam to realize recovery and reutilization of the high-temperature flue gas waste heat, the dust removal device is a glass fiber bag type dust remover 41, one end of the glass fiber bag type dust remover 41 is connected with the other end of the waste heat boiler 31 to remove dust particles in the low-temperature flue gas, one end of the CO removal device is connected with the other end of the glass fiber bag type dust remover 41 to convey the low-temperature flue gas with low dust into the CO removal device, so as to remove CO in the low-dust low-temperature flue gas.
Further, the CO remover 61 includes a cavity 611 and a supporting unit 612, the cavity 611 is a rigid cylindrical cavity 611, the supporting unit 612 is perpendicular to the length direction of the cavity 611 and is fixedly disposed inside the cavity 611, and the supporting unit 612 is provided with a plurality of supporting units.
Further, the supporting unit 612 includes a first circular plate 6121, a second circular plate 6122, a third circular plate 6123, and a fourth circular plate 6124, the first circular plate 6121 is disposed at one end of the cavity 611 near the low-dust normal-temperature flue gas inlet, the fourth circular plate 6124 is disposed at one end of the cavity 611 near the low-dust normal-temperature flue gas outlet, the second circular plate 6122 and the third circular plate 6123 are disposed between the first circular plate 6121 and the fourth circular plate 6124, the second circular plate 6122 is disposed at the lower end of the first circular plate 6121, the third circular plate 6123 is disposed at the lower end of the second circular plate 6122, the left upper end of the first circular plate 6121 is a solid plate, a plurality of through holes are disposed on the remaining plate, the right upper end of the second circular plate 6122 is a solid plate, a plurality of through holes are disposed on the remaining plate, the right lower end of the third circular plate 6123 is a solid plate, a plurality of through holes are disposed on the remaining plate, the left lower end of the fourth circular plate 6124 is a solid plate body, and a plurality of through holes are formed in the rest plate bodies.
Further, the shape of the through holes formed in the first circular plate 6121, the second circular plate 6122, the third circular plate 6123, and the fourth circular plate 6124 is one of square, circular, diamond, or octagonal, or a combination thereof.
Referring to fig. 2, the utility model provides another embodiment of a flue gas treatment system of a large submerged arc furnace for removing CO, which comprises a flue gas incineration device, a desulfurization denitration device, a high-temperature flue gas waste heat recovery device, a dust removal device, a low-temperature flue gas waste heat recovery device and a CO removal device, wherein one end of the flue gas incineration device is connected with the flue gas output end of the large submerged arc furnace 101 so as to convey the original high-temperature flue gas in the flue gas output end of the large submerged arc furnace 101 to the flue gas incineration device, the flue gas incineration device incinerates the original high-temperature flue gas so as to remove combustible substances in the original high-temperature flue gas, one end of the desulfurization denitration device is connected with the other end of the flue gas incineration device so as to convey the burnt original high-temperature flue gas to the desulfurization denitration device so as to desulfurize and denitrate the burnt original high-temperature flue gas, and the other end of the desulfurization denitration device, the device comprises a high-temperature flue gas waste heat recovery device, a dust removal device, a low-temperature flue gas recovery device, a low-dust and low-temperature flue gas recovery device, a CO removal device and a chimney, wherein the high-temperature flue gas waste heat recovery device is used for cooling the high-temperature flue gas so as to enable the high-temperature flue gas to be cooled into the low-temperature flue gas, the other end of the high-temperature flue gas waste heat recovery device is connected with the dust removal device, the dust removal device is used for removing dust from the low-temperature flue gas so as to enable the low-temperature flue gas to be cooled into the low-dust and low-temperature flue gas, the other end of the dust removal device is connected with one end of the low-temperature flue gas waste heat recovery device so as to enable the low-dust and low-temperature flue gas to be cooled into the low-dust and normal-temperature flue gas, the low-dust normal-temperature flue gas with CO removed is conveyed to the outside atmosphere, the flue gas incineration device is a combustion chamber 11, the desulfurization and denitration device comprises a desulfurization tower 21 and a denitration tower 22, one end of the desulfurization tower 21 is connected with the other end of the combustion chamber 11 so as to convey the incinerated original high-temperature flue gas into the desulfurization tower 21, the desulfurization tower 21 carries out desulfurization treatment on the incinerated original high-temperature flue gas so as to remove SOx and trace monomer sulfur in the incinerated original high-temperature flue gas, the other end of the desulfurization tower 21 is connected with one end of the denitration tower 22, the denitration tower 22 carries out denitration treatment on the incinerated original high-temperature flue gas so as to remove NOx in the incinerated original high-temperature flue gas, the incinerated original high-temperature flue gas is purified into the high-temperature flue gas through desulfurization and denitration, the high-temperature flue gas waste heat recovery device is a waste heat boiler 31, one end of the waste heat boiler 31 is connected with, the waste heat boiler 31 cools the high-temperature flue gas to heat water in the waste heat boiler 31 into steam, so as to recycle the waste heat of the high-temperature flue gas, the dust removal device is a glass fiber bag type dust remover 41, one end of the glass fiber bag type dust remover 41 is connected with the other end of the waste heat boiler 31 to remove dust particles in the low-temperature flue gas, the dust particles comprise silica micropowder, ash and coal powder, the low-temperature flue gas waste heat recovery device comprises a refrigerant evaporator 51, a gas-liquid separator 52, a compressor 53, a heat exchanger 54 and a hot water storage 55, the input end of the refrigerant evaporator 51 is connected with the other end of the glass fiber bag type dust remover 41 to convey the low-dust low-temperature flue gas to a refrigerant evaporator 51, the refrigerant evaporator 51 cools the low-dust low-temperature flue gas, the low-dust low-temperature flue gas becomes low-dust normal-temperature flue gas after heat release, and the first output end of the refrigerant evaporator, the low-dust normal-temperature flue gas is conveyed to a CO removing device which is a CO removing device 61, the second output end of a refrigerant evaporator 51 is connected with one end of a gas-liquid separator 52, the gas-liquid separator 52 performs gas-liquid separation on the refrigerant medium after temperature rise and vaporization, one end of a compressor 53 is connected with the other end of the gas-liquid separator 52, the compressor 53 compresses the gaseous refrigerant medium to enable the gaseous refrigerant medium to become high-temperature and high-pressure gaseous refrigerant medium, one end of a heat exchanger 54 is connected with the other end of the compressor 53, an external cold water source is connected into the heat exchanger 54 and is in contact with a pipeline through which the high-temperature and high-pressure gaseous refrigerant medium flows to perform heat exchange, so that the external cold water source absorbs heat and becomes hot water, the other end of the heat exchanger 54 is connected with a hot water storage 55 to convey the hot water to the hot water storage 55 for, the recycling of low-temperature waste heat is realized.
Specifically, the original high-temperature flue gas generated by the large-scale submerged arc furnace 101 is firstly conveyed into the combustion chamber 11, so that the combustible in the original high-temperature flue gas is combusted in the combustion chamber 11, the combustible contains more CO, a small amount of hydrocarbons, a small amount of coal powder, a small amount of hydrogen sulfide and other substances, the combustible is combusted in the combustion chamber 11 with oxygen to remove most of the combustible in the combustible, so that most of the combustible is combusted to become carbon dioxide, water and sulfur oxide, and the sulfur oxide in the combustible is removed through the subsequent desulfurization tower 21 and the denitration tower 22. After the original high-temperature flue gas is combusted in the combustion chamber 11, a small amount of combustible substances, i.e., a small amount of CO, still remains in the original high-temperature flue gas.
Specifically, the combustible material contained in the original high-temperature flue gas is combusted in the combustion chamber 11, and as the combustible material contains more CO, the CO is combusted to release heat, and the CO is removed from the combustion chamber 11, the temperature of the original high-temperature flue gas can be further increased, so that the combustible material is effectively recycled in the treatment process.
Specifically, carry the original high temperature flue gas after burning to the desulfurizing tower 21 tower in, in order to get rid of oxysulfide and trace monomer sulphur in the original high temperature flue gas after burning, carry the original high temperature flue gas after the desulfurization to the denitration tower 22 in, in order to get rid of the nitrogen oxide in the original high temperature flue gas after burning, become high temperature flue gas after with the original high temperature flue gas SOx/NOx control after burning, carry the high temperature flue gas to exhaust-heat boiler 31 in again, can show the corruption that reduces high temperature flue gas and cause exhaust-heat boiler 31 in letting in exhaust-heat boiler 31 in, make exhaust-heat boiler 31 no longer because of the corruption problem blowing out and overhaul, effectively improve exhaust-heat boiler 31 life, reduce exhaust-heat boiler 31 maintenance cost.
Specifically, the glass fiber bag type dust collector 41 removes dust from low-temperature flue gas through various comprehensive effects including gravity, screening, inertial collision, hooking effect, diffusion, electrostatic attraction and the like, so as to remove particulate matters such as silica micropowder, ash, coal dust and the like in the low-temperature flue gas, so that the low-temperature flue gas becomes low-dust low-temperature flue gas after being subjected to dust removal, and particles larger than gaps of filter cloth settle and remain in fibers due to the gravity and the inertial effect when dusty airflow flows through the filter cloth; the particles smaller than the gaps of the filter cloth collide with the filter cloth fibers and are hooked on the surface of the filter bag by the fibers (namely, hooking effect); smaller particles, which remain on the surface and in the interstices of the filter cloth due to intermolecular brownian motion; the finest particles are conveyed to the refrigerant evaporator 51 connected with the other end of the glass fiber bag type dust collector 41 after flowing through the filter cloth along with the air flow.
Further, a first adjusting valve 111 is further arranged on a flue connected with the flue gas output end of the large-scale submerged arc furnace 101 at one end of the combustion chamber 11, and a second adjusting valve 511 is further arranged on a pipeline connected with the input end of the refrigerant evaporator 51 and the other end of the glass fiber bag type dust collector 41.
Specifically, the first temperature sensor 512 monitors the temperature of the low-dust and low-temperature flue gas, and compares the temperature of the low-dust and low-temperature flue gas with a preset temperature: when the temperature of the low-dust low-temperature flue gas is not less than the preset temperature, the first regulating valve 111 is not regulated; when the temperature of the low-dust low-temperature flue gas is lower than the preset temperature, the flow rate of the original high-temperature flue gas output by the large submerged arc furnace 101 is too low, or the work load of the waste heat boiler 31 is too high, the flow rate of the original high-temperature flue gas output by the large submerged arc furnace 101 is increased by adjusting the first adjusting valve 111, so that the total inflow amount of the high-temperature flue gas conveyed to the waste heat boiler 31 is increased, under the condition that the work load of the waste heat boiler 31 is not adjusted, more high-temperature flue gas is conveyed to the waste heat boiler 31 to be heated and then become low-temperature flue gas, and the temperature of the; or the working load of the waste heat boiler 31 is reduced, the heat exchange degree of the waste heat boiler 31 to the high-temperature flue gas is reduced, and the high-temperature flue gas is cooled to be low-temperature flue gas under the condition that the flow rate of the original high-temperature flue gas output by the large submerged arc furnace 101 is not adjusted, so that the temperature of the low-temperature flue gas is increased to the preset temperature.
Specifically, the second temperature sensor 513 monitors the temperature of the low-dust normal-temperature flue gas, and compares the temperature of the low-dust normal-temperature flue gas with a preset temperature: when the temperature of the low-dust normal-temperature flue gas is lower than the preset temperature, the second adjusting valve 511 is not adjusted; when the temperature of the low-dust normal-temperature flue gas is not less than the preset temperature, it is indicated that the flow rate of the low-dust normal-temperature flue gas in the refrigerant evaporator 51 is too high, or the working load of the refrigerant evaporator 51 is too low, the flow rate of the low-dust low-temperature flue gas conveyed into the refrigerant evaporator 51 is reduced by adjusting the second adjusting valve 511, the total inflow amount of the low-dust low-temperature flue gas conveyed into the refrigerant evaporator 51 is reduced, and under the condition that the working load of the refrigerant evaporator 51 is not adjusted, less low-dust low-temperature flue gas passes through the refrigerant evaporator 51 to become low-dust normal-temperature flue gas, so that the temperature of the low-dust normal-; or the working load of the refrigerant evaporator 51 is increased, the heat exchange degree of the refrigerant evaporator 51 to the low-dust and low-temperature flue gas is increased, and the temperature of the low-dust and normal-temperature flue gas is reduced to the preset temperature under the condition that the flow rate of the low-dust and low-temperature flue gas is not adjusted.
Further, a first temperature sensor 512 is further arranged on a pipeline connecting the input end of the refrigerant evaporator 51 and the other end of the glass fiber bag type dust collector 41 to monitor the temperature of the low-dust and low-temperature flue gas, and a second temperature sensor 513 is further arranged on a pipeline connecting the first output end of the refrigerant evaporator 51 and the CO remover 61 to monitor the temperature of the low-dust and normal-temperature flue gas.
Further, the CO remover 61 comprises a cavity 611 and a supporting unit 612, the cavity 611 is a rigid cylindrical cavity 611, an inlet and an outlet of low-dust normal-temperature flue gas are respectively arranged at two ends of the cavity 611, the supporting unit 612 is perpendicular to the length direction of the cavity 611 and is fixedly arranged inside the cavity 611, and the supporting unit 612 is provided with a plurality of supporting units.
Specifically, after the original high-temperature flue gas is combusted in the combustion chamber 11, most of the combustible substances in the original high-temperature flue gas are converted into carbon dioxide, water and sulfur oxides after the combustion, but the combustion efficiency of the combustion chamber 11 on the original high-temperature flue gas is limited, a small amount of combustible substances still cannot be combusted in the combustion chamber 11, and the burnt original high-temperature flue gas is gradually processed by the desulfurizing tower 21, the denitrifying tower 22 and the glass fiber bag dust collector 41, so that only a small amount of coal powder and trace hydrogen sulfide in residual combustible substances can be removed, CO in the residual combustible substances cannot be effectively removed, and the residual CO will be discharged to the atmosphere through the external chimney 102 along with the low-dust normal-temperature flue gas. The CO remover 61 is disposed between the first output end of the refrigerant evaporator 51 and the external chimney 102 to further remove CO remaining in the low-dust normal-temperature flue gas, thereby preventing the remaining CO from being discharged into the atmosphere.
Specifically, the diameter of the supporting unit 612 is matched with the diameter of the cavity 611, and the supporting unit 612 is fixed on the inner wall of the cavity 611 by welding, so that the supporting unit 612 can bear more waste copper; the supporting units 612 are arranged inside the cavity 611, so that a plurality of CO removing spaces are formed between the supporting units 612 inside the cavity 611 and the adjacent supporting units 612, waste copper products such as waste copper wires, copper bars, copper plates and copper rods are filled in the CO removing spaces, a filling door is further arranged on one side, close to the CO removing spaces, of the cavity 611, the filling door is provided with a hinge, the filling door is opened along the cavity 611, so that the reduced waste copper is taken out from the inside of the cavity 611, the waste copper is filled into the cavity 611, and the filling door is closed along the cavity 611. Conveying the low-dust normal-temperature flue gas into a CO remover 61, wherein the temperature of the low-dust normal-temperature flue gas is 35-60 ℃ so as to heat the waste copper in the CO removing space, and because a copper oxide film is formed on the surface of a waste copper product through oxidation, the copper oxide film reacts with residual CO in the cavity 611, so that the copper oxide is reduced into copper by the CO, and the CO is oxidized into CO2The method realizes effective removal of CO, promotes the waste copper to remove the copper oxide film on the surface, changes the waste copper into copper, can be used for copper smelting enterprises to recycle and remelt, and reduces the waste copper treatment link.
Referring to fig. 3 to 6, further, the supporting unit 612 includes a first circular plate 6121, a second circular plate 6122, a third circular plate 6123, and a fourth circular plate 6124, the first circular plate 6121 is disposed at one end of the cavity 611 near the low-dust normal-temperature flue gas inlet, the fourth circular plate 6124 is disposed at one end of the cavity 611 near the low-dust normal-temperature flue gas outlet, the second circular plate 6122 and the third circular plate 6123 are disposed between the first circular plate 6121 and the fourth circular plate 6124, the second circular plate 6122 is disposed at the lower end of the first circular plate 6121, the third circular plate 6123 is disposed at the lower end of the second circular plate 6122, the left upper end of the first circular plate 6121 is a solid plate, the remaining plate bodies are provided with a plurality of through holes, the right upper end of the second circular plate 6122 is a solid plate body, the remaining plate bodies are provided with a plurality of through holes, the right lower end of the third circular plate 6123 is a solid plate, the remaining plate body is provided with a plurality of through holes, the left lower end of the fourth circular plate 6124 is a solid plate body, and the remaining plate body is provided with a plurality of through holes.
Specifically, the first circular plate 6121, the second circular plate 6122, the third circular plate 6123, and the fourth circular plate 6124 are adjacently arranged from top to bottom, and the left upper end of the first circular plate 6121 is a solid plate body to block the low-dust normal-temperature flue gas passing through the first circular plate 6121, so that the low-dust normal-temperature flue gas passes through a plurality of through holes in the remaining plate body of the first circular plate 6121, and the flow rate of the low-dust normal-temperature flue gas passing through the first circular plate 6121 is reduced, so that the waste copper products filled in the first circular plate 6121 are fully contacted with the low-dust normal-temperature flue gas; the upper right end of the second circular plate 6122 is a solid plate, which obstructs the low-dust normal-temperature flue gas passing through the plurality of through holes on the remaining plate body of the first circular plate 6121, so that the low-dust normal-temperature flue gas passes through the plurality of through holes on the remaining plate body of the second circular plate 6122, and the flow rate of the low-dust normal-temperature flue gas passing through the second circular plate 6122 is reduced, so that the waste copper product filled on the second circular plate 6122 is fully contacted with the low-dust normal-temperature flue gas; the right lower end of the third circular plate 6123 is a solid plate, which obstructs the low-dust normal-temperature flue gas passing through the plurality of through holes on the remaining plate body of the second circular plate 6122, so that the low-dust normal-temperature flue gas passes through the plurality of through holes on the remaining plate body of the third circular plate 6123, and the flow rate of the low-dust normal-temperature flue gas passing through the third circular plate 6123 is slowed down, so that the waste copper product filled in the third circular plate 6123 is fully contacted with the low-dust normal-temperature flue gas; the solid plate body at the left lower end of the fourth circular plate 6124 obstructs the low-dust normal-temperature flue gas passing through the plurality of through holes on the remaining plate body of the third circular plate 6123, so that the low-dust normal-temperature flue gas passes through the plurality of through holes on the remaining plate body of the fourth circular plate 6124, and the flow rate of the low-dust normal-temperature flue gas passing through the fourth circular plate 6124 is reduced, so that the waste copper product filled on the fourth circular plate 6124 is in full contact with the low-dust normal-temperature flue gas; further improving the reaction efficiency of the low-dust normal-temperature flue gas and the waste copper products filled on the first circular plate 6121, the second circular plate 6122, the third circular plate 6123 and the fourth circular plate 6124, so as to further remove CO in the low-dust normal-temperature flue gas.
Specifically, a plurality of through holes are formed in the remaining plate bodies of the first circular plate 6121, the second circular plate 6122, the third circular plate 6123 and the fourth circular plate 6124, when low-dust normal-temperature flue gas passes through the first circular plate 6121, the second circular plate 6122, the third circular plate 6123 and the fourth circular plate 6124 from top to bottom, the low-dust normal-temperature flue gas can only pass through the plurality of through holes in the remaining plate body of the first circular plate 6121, then passes through the plurality of through holes in the remaining plate body of the second circular plate 6122, then passes through the plurality of through holes in the remaining plate body of the third circular plate 6123, and then passes through the plurality of through holes in the remaining plate body of the fourth circular plate 6124, through the arrangement, the first circular plate 6121, the second circular plate 6122, the third circular plate 6123 and the fourth circular plate 6124 form a flue from top to bottom, and the low-dust normal-temperature spiral flue gas can only pass through the spiral flue, the circulation path of the low-dust normal-temperature flue gas in the cavity 611 is increased, so that the low-dust normal-temperature flue gas is in full contact with the waste copper products filled in the first circular plate 6121, the second circular plate 6122, the third circular plate 6123 and the fourth circular plate 6124, and further the reaction efficiency of the low-dust normal-temperature flue gas and the waste copper products is improved, and the CO in the low-dust normal-temperature flue gas is further removed.
Specifically, the spiral flue in one supporting unit 612 has a certain length, the supporting unit 612 is provided with a plurality of supporting units inside the cavity 611, the plurality of supporting units 612 are adjacently arranged in the cavity 611, so that the plurality of spaces for removing CO are connected end to end, the length of the spiral flue inside the cavity 611 is further prolonged, compared with a straight-up and straight-down flue in the cavity 611, the spiral flue greatly improves the flow path of the low-dust normal-temperature flue gas in the cavity 611, and simultaneously, the spiral flue slows down the flow speed of the low-dust normal-temperature flue gas in the cavity 611, so that the low-dust normal-temperature flue gas is fully contacted with the waste copper products in the spiral flue, and CO in the low-dust normal-temperature flue gas is effectively removed.
Referring to fig. 2 to 5, further, the plurality of through holes formed in the first circular plate 6121, the second circular plate 6122, the third circular plate 6123, and the fourth circular plate 6124 are in the shape of one of a square, a circle, a diamond, an octagon, or a combination thereof, and the first circular plate 6121, the second circular plate 6122, the third circular plate 6123, and the fourth circular plate 6124 are rigid circular plates.
Specifically, a plurality of through holes are formed in the plate bodies of the first circular plate 6121, the second circular plate 6122, the third circular plate 6123 and the fourth circular plate 6124, the through holes are paths through which the low-dust normal-temperature flue gas passes in the CO remover 61, the low-dust normal-temperature flue gas is obstructed by the through holes when passing through the through holes, the passing speed of the low-dust normal-temperature flue gas in the cavity 611 is reduced, meanwhile, the low-dust normal-temperature flue gas continuously diffuses into the CO removing space along the through holes, so that the low-dust normal-temperature flue gas is fully contacted with waste copper, the contact surface between the low-dust normal-temperature flue gas and the waste copper is increased, the residual CO in the low-dust normal-temperature flue gas is fully contacted and reacted with a copper oxide film on the surface of the waste copper, and further, the residual CO in the low-.
The method comprises the following specific implementation steps:
1) The original high-temperature flue gas in the large-scale submerged arc furnace 101 is conveyed to the combustion chamber 11, and most of combustible substances contained in the original high-temperature flue gas are removed by the combustion chamber 11;
2) Conveying the incinerated original high-temperature flue gas into a desulfurization tower 21 and a denitration tower 22 to perform desulfurization and denitration on the incinerated original high-temperature flue gas so as to enable the incinerated original high-temperature flue gas to become high-temperature flue gas after desulfurization and denitration;
3) Conveying the high-temperature flue gas into a waste heat boiler 31, wherein the waste heat boiler 31 cools the high-temperature flue gas to heat water in the waste heat boiler 31 into steam, so that the high-temperature flue gas is cooled into low-temperature flue gas, and the waste heat of the high-temperature flue gas is recycled;
4) Conveying the low-temperature flue gas into a glass fiber bag type dust collector 41, and removing particulate matters such as silica micro powder, ash, coal powder and the like in the low-temperature flue gas through various comprehensive effects including gravity, screening, inertial collision, hooking effect, diffusion, electrostatic attraction and the like, so that the low-temperature flue gas becomes low-dust low-temperature flue gas after being subjected to dust removal;
5) The low-dust low-temperature flue gas is conveyed into a refrigerant evaporator 51, the low-dust low-temperature flue gas exchanges heat with a refrigerant medium inside the refrigerant evaporator 51, the low-dust low-temperature flue gas becomes low-dust normal-temperature flue gas after releasing heat, the refrigerant medium in the refrigerant evaporator 51 absorbs heat and then vaporizes, the refrigerant evaporator 51 conveys the vaporized refrigerant medium into a gas-liquid separator 52 so as to carry out gas-liquid separation on the vaporized refrigerant medium, then the gaseous refrigerant medium is conveyed into a compressor 53 so as to compress the gaseous refrigerant medium into a high-temperature high-pressure gaseous refrigerant medium, then the high-temperature high-pressure gaseous refrigerant medium is conveyed into a heat exchanger 54 so as to exchange heat between the high-temperature high-pressure gaseous refrigerant medium and an external cold water source in the heat exchanger 54, so that the external cold water source absorbs heat and then becomes hot water, and then the hot water is conveyed into an external hot water storage 55 for a production line, the recycling of low-temperature waste heat is realized;
6) Conveying the low-dust normal-temperature flue gas into a CO remover 61 so that CO in the low-dust normal-temperature flue gas reduces waste copper in the CO remover 61 to remove CO in the low-dust normal-temperature flue gas;
7) The CO-removed low-dust normal temperature flue gas is conveyed to an external chimney 102.
The embodiment of the utility model provides a module or unit in the device can merge, divide and delete according to actual need.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (4)
1. The utility model provides a get rid of large-scale ore smelting furnace flue gas processing system of CO which characterized in that: the device comprises a flue gas incineration device, a desulfurization and denitration device, a high-temperature flue gas waste heat recovery device, a dust removal device and a CO removal device, wherein one end of the flue gas incineration device is connected with the flue gas output end of the large submerged arc furnace to convey original high-temperature flue gas in the flue gas output end of the large submerged arc furnace into the flue gas incineration device, the flue gas incineration device incinerates the original high-temperature flue gas to remove combustible substances in the original high-temperature flue gas, one end of the desulfurization and denitration device is connected with the other end of the flue gas incineration device to convey the incinerated original high-temperature flue gas into the desulfurization and denitration device so as to enable the incinerated original high-temperature flue gas to be subjected to desulfurization and denitration and become high-temperature flue gas, the other end of the desulfurization and denitration device is connected with one end of the high-temperature flue gas waste heat recovery device to convey the high-temperature flue gas into, so that the high-temperature flue gas is cooled to become low-temperature flue gas, the other end of the high-temperature flue gas waste heat recovery device is connected with one end of a dust removal device, the dust removal device removes dust from the low-temperature flue gas so that the low-temperature flue gas is removed dust to become low-dust low-temperature flue gas, one end of a CO removal device is connected with the other end of the dust removal device so as to remove CO from the low-dust low-temperature flue gas, the other end of the CO removal device is connected with an external chimney so as to convey the low-dust low-temperature flue gas from which CO is removed to the external atmosphere, the flue gas incineration device is a combustion chamber, the desulfurization and denitration device comprises a desulfurization tower and a denitration tower, one end of the desulfurization tower is connected with the other end of the combustion chamber so as to convey the incinerated original high-temperature flue gas into the desulfurization tower, the desulfurization tower carries, the denitration tower carries out denitration treatment on incinerated original high-temperature flue gas, the high-temperature flue gas waste heat recovery device is a waste heat boiler, one end of the waste heat boiler is connected with the other end of the denitration tower, the waste heat boiler cools the high-temperature flue gas to heat water in the waste heat boiler into steam, recycling of waste heat of the high-temperature flue gas is achieved, the dust removal device is a glass fiber bag type dust remover, one end of the glass fiber bag type dust remover is connected with the other end of the waste heat boiler to remove dust particles in the low-temperature flue gas, one end of the CO removal device is connected with the other end of the glass fiber bag type dust remover to convey the low-dust low-temperature flue gas to the CO removal device, and the CO removal device is a CO removal device to remove CO in the low-dust low-temperature.
2. the flue gas treatment system for the large submerged arc furnace for removing CO according to claim 1, wherein: the CO remover comprises a cavity and a supporting unit, the cavity is a rigid cylindrical cavity, the supporting unit is perpendicular to the length direction of the cavity and is fixedly arranged in the cavity, and the supporting unit is provided with a plurality of units.
3. The flue gas treatment system for the large submerged arc furnace for removing CO according to claim 2, wherein: the supporting unit comprises a first circular plate, a second circular plate, a third circular plate and a fourth circular plate, the first circular plate is arranged at one end close to a low-dust normal-temperature flue gas inlet in the cavity, the fourth circular plate is arranged at one end close to a low-dust normal-temperature flue gas outlet in the cavity, the second circular plate and the third circular plate are arranged between the first circular plate and the fourth circular plate, the second circular plate is arranged at the lower end of the first circular plate, the third circular plate is arranged at the lower end of the second circular plate, the upper left end of the first circular plate is a solid plate, a plurality of through holes are formed in the rest plates, the upper right end of the second circular plate is a solid plate, a plurality of through holes are formed in the rest plates, the lower right end of the third circular plate is a solid plate, a plurality of through holes are formed in the rest plates, the lower left end of the fourth circular plate is a solid plate, the remaining plate bodies are provided with a plurality of through holes.
4. The flue gas treatment system for the large submerged arc furnace for removing CO according to claim 3, wherein: the shape of the through holes formed in the first circular plate, the second circular plate, the third circular plate and the fourth circular plate is one of square, circular, diamond and octagon or the combination of the square, circular, diamond and octagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920391803.2U CN209802110U (en) | 2019-03-26 | 2019-03-26 | Large submerged arc furnace flue gas treatment system for removing CO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920391803.2U CN209802110U (en) | 2019-03-26 | 2019-03-26 | Large submerged arc furnace flue gas treatment system for removing CO |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209802110U true CN209802110U (en) | 2019-12-17 |
Family
ID=68826380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920391803.2U Active CN209802110U (en) | 2019-03-26 | 2019-03-26 | Large submerged arc furnace flue gas treatment system for removing CO |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209802110U (en) |
-
2019
- 2019-03-26 CN CN201920391803.2U patent/CN209802110U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yu et al. | A review on reduction technology of air pollutant in current China's iron and steel industry | |
| CN105771946B (en) | A kind of active coke regeneration system and regeneration method | |
| CN108380041A (en) | A kind of coke oven flue gas system for desulfuration and denitration and method based on activated carbon/coke | |
| CN108980847B (en) | A kind of rubbish charing burning treatment process | |
| CN215027580U (en) | Flue gas pretreatment device for capturing carbon dioxide in glass kiln | |
| CN207667378U (en) | A kind of activated carbon thermal analysis apparatus | |
| CN106984169A (en) | Denitration system and method capable of directly utilizing heat of sinter | |
| CN107726331B (en) | Wiring board burns smelting furnace and wiring board burns smelting process | |
| CN107131770A (en) | A kind of agglomeration for iron mine waste heat recovery collaboration emission reduction SOXAnd NOXMethod | |
| CN110813006A (en) | Waste gas waste heat recovery and purification process of coke oven gas heating system | |
| WO2019237869A1 (en) | Multi-process coupled power generation system combusting fossil fuel and oxygen-rich combustion waste | |
| CN208177248U (en) | It is a kind of based on active carbon/coke coke oven flue gas system for desulfuration and denitration | |
| CN102072662B (en) | Integrative method and apparatus for waste heat recovery, flue gas treatment and porous sintering in sintering process | |
| CN110354670A (en) | A kind of boiler with tailed flue gas takes off white system and method | |
| CN109839010B (en) | Large submerged arc furnace flue gas waste heat recycling system for removing dioxin | |
| CN109999574A (en) | A kind of thermopnore activated carbon adsorption method of denitration of low-sulfur flue gas | |
| CN110813007A (en) | Waste gas waste heat recovery and purification process of mixed gas heating system | |
| CN114278948A (en) | Treatment device and method for retired wind power blade | |
| CN209802110U (en) | Large submerged arc furnace flue gas treatment system for removing CO | |
| CN210855981U (en) | Dry quenching coke and coke oven flue gas combined purification system | |
| CN107987892A (en) | Mineral hot furnace coal-gas recovering Application way and equipment | |
| CN111878835A (en) | Coupling process and system for carbon-containing solid waste combustion utilization and sintering flue gas purification treatment | |
| CN209541450U (en) | A kind of comprehensive treatment of sintering flue gas and the system of utilizing | |
| CN209893968U (en) | Large-scale submerged arc furnace flue gas waste heat recycling system for removing dioxin | |
| CN206778183U (en) | Denitration system capable of directly utilizing heat of sinter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |