CN209893968U - Large-scale submerged arc furnace flue gas waste heat recycling system for removing dioxin - Google Patents
Large-scale submerged arc furnace flue gas waste heat recycling system for removing dioxin Download PDFInfo
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- CN209893968U CN209893968U CN201920391806.6U CN201920391806U CN209893968U CN 209893968 U CN209893968 U CN 209893968U CN 201920391806 U CN201920391806 U CN 201920391806U CN 209893968 U CN209893968 U CN 209893968U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model provides a large-scale ore furnace flue gas waste heat recycling system who gets rid of dioxin, including flue gas incineration device, desulfurization denitration device, high temperature flue gas waste heat recovery device, dust collector, remove dioxin device, low temperature flue gas waste heat recovery device, remove CO device, the utility model discloses be provided with low temperature flue gas waste heat recovery device, low temperature flue gas waste heat recovery device includes refrigerant evaporimeter, vapour and liquid separator, compressor, heat exchanger, hot water accumulator, and the waste heat in the low temperature flue gas of effectual recovery reuse realizes the recovery of high temperature heat in the original high temperature flue gas, low temperature heat, the utility model discloses be provided with the adsorption tower, be provided with a plurality of dioxin adsorption unit in the adsorption tower, fill polyimide fiber in the dioxin adsorption unit to get rid of the dioxin in the low dust low temperature flue gas, adopt this kind of method to handle the dioxin, do not need the adsorption tower to additionally to provide heat source, the adsorption removal effect is good, and the residual dioxin in the flue gas can be effectively removed.
Description
Technical Field
The utility model relates to a hot stove flue gas waste heat recovery technical field in ferroalloy ore deposit especially relates to a large-scale hot stove flue gas waste heat recycling system who gets rid of dioxin.
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 recycling the waste heat of the flue gas of the large submerged arc furnace, the original high-temperature flue gas is subjected to incineration, desulfurization and denitration treatment SO that the original high-temperature flue gas becomes the high-temperature flue gas, and SO in the original high-temperature flue gas is removedX、NOXHarmful gases such as CO and the like, but a small amount of dioxin is still contained in the treated high-temperature flue gas, because the ultrafine granular dioxin is adsorbed on the surface of PM2.5 particles and is difficult to remove by a glass fiber bag type dust collector, the dioxin comprises 210 compounds and has extremely strong carcinogenicity, the substances are very stable and difficult to naturally degrade and eliminate, the dioxin can be completely decomposed after staying for 2 seconds in a temperature environment above 850 ℃, the decomposed dioxin needs to be cooled to below 300 ℃ at an extremely high speed to prevent the dioxin from being generated again, and the dioxin-containing dioxin-removing agent contains dioxinAfter the smoke of the dioxin is discharged into the atmosphere, the carcinogenicity of the atmosphere can be increased, and after people and animals inhale PM2.5 particles containing the dioxin, serious potential safety hazards can be generated to the health of the people and the animals.
Disclosure of Invention
In view of the above, it is necessary to provide a flue gas waste heat recycling system for a large submerged arc furnace, which removes dioxin.
A flue gas waste heat recycling system of a large submerged arc furnace for removing dioxin comprises a flue gas burning device, a desulfurization and denitration device, a high-temperature flue gas waste heat recovery device, a dust removal device, a dioxin removal device, a low-temperature flue gas waste heat recovery device and a CO removal device, wherein one end of the flue gas burning 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 burning device, the flue gas burning device burns 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 burning device so as to convey the burnt original high-temperature flue gas into the desulfurization and denitration device so as to enable the burnt original high-temperature flue gas to become high-temperature flue gas after desulfurization and denitration, and the other end of the desulfurization, 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 low-temperature flue gas recovery device and a low-temperature flue gas recovery device, 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 become low-temperature flue gas after being cooled, the other end of the high-temperature flue gas waste heat recovery device is connected with one end of the low-dust and low-temperature flue gas removal device so as to enable the low-dust and low-temperature flue gas to be conveyed into the low-dust and low-temperature flue gas removal device, the low-dust and low-temperature flue gas removal device is used for removing dioxin from the low-dust and low-temperature flue gas, the other end of the low-dust and low-temperature flue gas removal device is connected with one end of the low-temperature flue gas waste heat recovery, so that the low-dust and low-temperature flue gas with dioxin removed is cooled to become low-dust and normal-temperature flue gas, one end of the CO removing device is connected with the other end of the low-dust and normal-temperature flue gas waste heat recovery device to remove CO in the low-dust and normal-temperature flue gas, the other end of the CO removing device is connected with an external chimney to convey the CO-removed low-dust and normal-temperature flue gas to the external atmosphere, the flue gas burning 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 burnt original high-temperature flue gas into the desulfurization tower, the desulfurization tower carries out desulfurization treatment on the burnt original high-temperature flue gas, the other end of the desulfurization tower is connected with one end of a denitration tower, the denitration tower carries out denitration treatment on the burnt original high-temperature flue gas, the high-temperature flue gas waste heat recovery device, the waste heat boiler cools the high-temperature flue gas to heat water in the waste heat boiler into steam, so that the waste heat of the high-temperature flue gas is recycled, 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, the dioxin removal device is an adsorption tower, the low-temperature flue gas waste heat recovery device comprises a refrigerant evaporator, a gas-liquid separator, a compressor, a heat exchanger and a hot water storage device, the input end of the refrigerant evaporator is connected with the other end of the adsorption tower to convey the low-dust low-temperature flue gas subjected to dioxin removal to the refrigerant evaporator, the refrigerant evaporator cools the low-dust low-temperature flue gas subjected to dioxin removal, the first output end of the refrigerant evaporator is connected with one end of the CO removal device to convey the low-dust normal-temperature flue gas to the CO removal device, the CO removing device is a CO removing device, a second output end of the refrigerant evaporator is connected with one end of a gas-liquid separator, the gas-liquid separator performs gas-liquid separation on the refrigerant medium after being heated and vaporized, one end of the compressor is connected with the other end of the gas-liquid separator, the compressor compresses the gaseous refrigerant medium to enable the gaseous refrigerant medium to become high-temperature and high-pressure gaseous refrigerant medium, one end of the heat exchanger is connected with the other end of the compressor, an external cold water source is connected into the heat exchanger and contacts 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 then becomes hot water, and the other end of the heat exchanger is connected with a hot water storage device to achieve recycling of low.
Preferably, a first regulating valve is further arranged on a flue connected with the flue gas output end of the large submerged arc furnace at one end of the combustion chamber, and a second regulating valve is further arranged on a pipeline connected with the input end of the refrigerant evaporator and the other end of the adsorption tower.
Preferably, a first temperature sensor is further arranged on a pipeline connecting the input end of the refrigerant evaporator and the other end of the adsorption tower, and a second temperature sensor is further arranged on a pipeline connecting the first output end of the refrigerant evaporator and the CO remover.
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.
Preferably, be provided with the dioxin in the adsorption tower and adsorb the unit, the dioxin adsorbs the unit and is provided with a plurality of, the dioxin adsorbs the unit and includes adsorption tube, lid, adsorption tube one end is sealed, and the other end is uncovered, the lid sets up on the uncovered of the adsorption tube other end to make the adsorption tube other end open or closed, a plurality of through-hole has still been seted up on the adsorption tube.
Preferably, an adsorption rod is filled in the cavity of the dioxin adsorption unit to remove dioxin in the low-dust and low-temperature flue gas.
The utility model discloses be provided with low temperature flue gas waste heat recovery device, will remove the low dust low temperature flue gas of dioxin and carry to the refrigerant evaporimeter in, the low dust low temperature flue gas that removes the dioxin exchanges heat with the inside cold medium matter of refrigerant evaporimeter, the low dust low temperature flue gas that removes the dioxin becomes low dust normal atmospheric temperature flue gas after releasing heat, the cold medium matter in the refrigerant evaporimeter vaporizes after absorbing heat, the refrigerant evaporimeter carries the cold medium matter after vaporizing to the vapour-liquid separator, so that the cold medium matter after the vaporization carries out gas-liquid separation, carry gaseous cold medium to the compressor again, so that gaseous cold medium matter becomes high temperature high pressure gaseous cold medium, carry high temperature high pressure gaseous cold medium to the heat exchanger in again, so that the gaseous cold medium of high temperature high pressure carries out the heat exchange with the outside cold water source in the heat exchanger, become hot water after the outside cold water source absorbs heat, 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.
The utility model discloses be provided with the adsorption tower, be provided with a plurality of dioxin adsorption unit in the adsorption tower, it has the adsorption rod that the polyimide fiber made to fill in the dioxin adsorption unit, with the dioxin in getting rid of low dust low temperature flue gas, adopt this kind of method to handle the dioxin, best processing temperature in 130-.
Drawings
Fig. 1 is a schematic diagram of a flue gas waste heat recycling system of a large submerged arc furnace for removing dioxin.
Fig. 2 is a schematic structural view of the first circular plate.
Fig. 3 is a schematic view of the structure of the second circular plate.
Fig. 4 is a schematic structural view of a third circular plate.
Fig. 5 is a schematic structural view of a fourth circular plate.
FIG. 6 is a schematic view showing the structure of a sandwich layer in the adsorption column.
FIG. 7 is a schematic view showing the structure of another sandwich layer in the adsorption column.
Fig. 8 is a schematic view of another embodiment of a flue gas waste heat recycling system of a large submerged arc furnace for removing dioxin.
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, a fourth circular plate 6124, an adsorption tower 71, a dioxin adsorption unit 711, an adsorption pipe 7111 and a cover body 7112; the system comprises a large-scale submerged arc furnace 101, an external chimney 102, a reverse osmosis water purifier 103, a deaerator 104, a steam turbine 105 and a generator 106.
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 flue gas waste heat recycling system of a large submerged arc furnace for removing dioxin, which comprises a flue gas burning device, a desulfurization and denitration device, a high temperature flue gas waste heat recovery device, a dust removal device, a dioxin removal device, a low temperature flue gas waste heat recovery device and a CO removal device, wherein one end of the flue gas burning 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 burning device, the flue gas burning device burns the original high temperature flue gas so as to remove the 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 burning device so as to convey the burnt original high temperature flue gas to the desulfurization and denitration device so as to form the high temperature flue gas after desulfurization and denitration of the burnt original high temperature flue gas, and the other end of the desulfurization and 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 low-temperature flue gas recovery device and a low-temperature flue gas recovery device, 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 become low-temperature flue gas after being cooled, the other end of the high-temperature flue gas waste heat recovery device is connected with one end of the low-dust and low-temperature flue gas removal device so as to enable the low-dust and low-temperature flue gas to be conveyed into the low-dust and low-temperature flue gas removal device, the low-dust and low-temperature flue gas removal device is used for removing dioxin from the low-dust and low-temperature flue gas, the other end of the low-dust and low-temperature flue gas removal device is connected with one end of the low-temperature flue gas waste heat recovery, so that the low-dust and low-temperature flue gas with dioxin removed is cooled to become low-dust and normal-temperature flue gas, one end of the CO removal device is connected with the other end of the low-dust and normal-temperature flue gas waste heat recovery device to remove CO in the low-dust and normal-temperature flue gas, the other end of the CO removal device is connected with the external chimney 102 to convey the CO-removed low-dust and normal-temperature flue gas to 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 other end of the combustion chamber 11 to convey the incinerated original high-temperature flue gas to the desulfurization tower 21, the desulfurization tower 21 carries out desulfurization treatment on the incinerated original high-temperature flue gas 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, and the denitration, the method comprises the steps of removing NOx in the incinerated original high-temperature flue gas, purifying the incinerated original high-temperature flue gas into high-temperature flue gas through desulfurization and denitrification, wherein 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 a denitrification tower 22, 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 waste heat of the high-temperature flue gas is recovered and reused, 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 dioxin removal device is an adsorption tower 71, and the low-temperature flue gas waste heat recovery device comprises a refrigerant evaporator 51, a gas-, The heat exchanger 54 and the hot water storage 55, the input end of the refrigerant evaporator is connected with the other end of the adsorption tower 71 to convey the low-dust low-temperature flue gas subjected to dioxin removal to the refrigerant evaporator, the refrigerant evaporator cools the low-dust low-temperature flue gas subjected to dioxin removal, the heat of the low-dust low-temperature flue gas subjected to dioxin removal is released to form low-dust normal-temperature flue gas, the first output end of the refrigerant evaporator 51 is connected with one end of the CO removal device to convey the low-dust normal-temperature flue gas to the CO removal device, the CO removal device is a CO removal device 61, the second output end of the refrigerant evaporator 51 is connected with one end of the gas-liquid separator 52, the gas-liquid separator 52 performs gas-liquid separation on the refrigerant medium subjected to temperature rise and vaporization, one end of the 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, one end of the 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 contacts with a pipeline through which a high-temperature high-pressure gaseous refrigerant medium flows to perform heat exchange, so that the external cold water source absorbs heat and then becomes hot water, and the other end of the heat exchanger 54 is connected with the hot water storage 55 so that the hot water is conveyed to the hot water storage 55 to be used by a production line, and 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 adsorption tower 71 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.
Among the prior art, directly pack polyimide fiber inside adsorption tower 71, polyimide fiber has longer distance at adsorption tower 71 length direction, in order to form polyimide fiber filter layer, when low-dust low temperature flue gas gets into and passes through from adsorption tower 71 top from adsorption tower 71 bottom, because low-dust low temperature flue gas has higher temperature and velocity of flow, the route that no low-dust low temperature flue gas passes through in the adsorption tower 71, and the speed that low-dust low temperature flue gas passes through the polyimide fiber filter layer is slower, cause low-dust low temperature flue gas to block up inside adsorption tower 71, cause adsorption tower 71 to adsorb the dioxin effect in the low-dust low temperature flue gas not good.
Referring to fig. 6 and 7, a plurality of interlayers are arranged inside the adsorption tower 71, the interlayers are perpendicular to the length direction of the adsorption tower 71, a plurality of dioxin adsorption units 711 are arranged in the interlayers, the dioxin adsorption units 711 are adjacently arranged in one interlayer, so that gaps are formed between the adjacent dioxin adsorption units 711, a plurality of gaps for low-dust and low-temperature flue gas to pass through are arranged in one interlayer, the positions of the dioxin adsorption units 711 in one interlayer in the interlayer are not fixed, so that the gap of one interlayer is different from the gap of the other interlayer, the low-dust and low-temperature flue gas enters from the bottom of the adsorption tower 71 and passes through the gaps of the interlayers, and the gaps of the interlayers are different, so that the flow path of the low-dust and low-temperature flue gas from bottom to top in the adsorption tower 71 is prolonged, and the low-dust and low-temperature flue gas is fully contacted with the dioxin adsorption units 711 in the flow path, the adsorption effect of the dioxin adsorption unit 711 on dioxin in low-dust low-temperature flue gas is improved, and the adsorption quantity of the dioxin adsorption unit 711 on dioxin is increased.
Further, a first regulating 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 regulating valve 511 is further arranged on a pipeline connected with the input end of the refrigerant evaporator 51 and the other end of the adsorption tower 71.
Specifically, the first temperature sensor 512 monitors the temperature of the low-dust and low-temperature flue gas except for dioxin, and compares the temperature of the low-dust and low-temperature flue gas except for dioxin with a preset temperature: when the temperature of the low-dust low-temperature flue gas subjected to dioxin removal 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 for removing dioxin is lower than the preset temperature, the flow rate of the original high-temperature flue gas output by the large-scale 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-scale 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 cooled to become low-temperature flue gas, and the temperature of the low-temperature flue; 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, 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, and the temperature of the low-temperature flue gas except dioxin 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 low-temperature flue gas for removing dioxin in the refrigerant evaporator 51 is too high, or the work load of the refrigerant evaporator 51 is too low, the flow rate of the low-dust low-temperature flue gas for removing dioxin conveyed to 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 for removing dioxin conveyed to the refrigerant evaporator 51 is reduced, and under the condition that the work load of the refrigerant evaporator 51 is not adjusted, less low-dust low-temperature flue gas for removing dioxin becomes low-dust normal-temperature flue gas after passing through the refrigerant evaporator 51, so that the temperature of the low-dust normal-temperature flue gas is reduced to the preset temperature; 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 without dioxin is increased, and the low-dust and normal-temperature flue gas temperature is reduced to the preset temperature under the condition that the flow rate of the low-dust and low-temperature flue gas without dioxin 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 adsorption tower 71 to monitor the temperature of the low-dust and low-temperature flue gas except dioxin, 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. 2 to 5, 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.
Specifically, a part of each of the first circular plate 6121, the second circular plate 6122, the third circular plate 6123 and the fourth circular plate 6124 in the spiral flue is a solid plate, low-dust normal-temperature flue gas introduced into the spiral flue cannot pass through the solid plate, the solid plate slows down the flow velocity of the low-dust normal-temperature flue gas in the spiral flue, and the existing S-shaped flue only prolongs the length of the flue and cannot slow down the flow velocity of the low-dust normal-temperature flue gas in the S-shaped flue, so that the contact between the low-dust normal-temperature flue gas and a waste copper product is insufficient, and the removal of CO in the low-dust normal-temperature flue gas is incomplete.
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-.
Referring to fig. 6 and 7, further, a dioxin adsorption unit 711 is arranged in the adsorption tower 71, the dioxin adsorption unit 711 is provided with a plurality of dioxin adsorption units, the dioxin adsorption unit 711 includes an adsorption tube 7111 and a cover body 7112, one end of the adsorption tube 7111 is sealed, the other end of the adsorption tube 7111 is open, the cover body 7112 is arranged on the opening at the other end of the adsorption tube 7111 so that the other end of the adsorption tube 7111 is open or closed, and the adsorption tube 7111 is further provided with a plurality of through holes.
Specifically, the dioxin adsorption unit 711 includes an adsorption tube 7111 and a cover body 7112, the adsorption tube 7111 is used for installing an adsorption rod made of polyimide fibers, the adsorption rod is convenient to install, the replacement efficiency of the polyimide fibers in the adsorption tower 71 is greatly improved, when the polyimide fibers in the adsorption tower 71 adsorb dioxin in a saturated manner, only a new adsorption rod needs to be installed in the adsorption tube 7111, and then the cover body 7112 is arranged on an opening of the adsorption tube 7111 to close the adsorption tube 7111; the cavity of the dioxin adsorption unit 711 is further provided with a plurality of through holes so that polyimide fibers inside the cavity are in direct contact with low-dust and low-temperature flue gas to adsorb dioxin in the low-dust and low-temperature flue gas.
The utility model discloses be provided with adsorption tower 71, the best treatment temperature that adsorption tower 71 got rid of dioxin in the low dust low temperature flue gas is in 130 + 180 ℃, and the temperature of the low dust low temperature flue gas in adsorption tower 71 is in 100 + 200 ℃, the temperature of low dust low temperature flue gas self can satisfy the effective absorption of polyimide fiber to dioxin in the adsorption tower 71, do not need adsorption tower 71 additionally to provide the heat source, or only need adsorption tower 71 to provide a small amount of heat, it is effectual to adsorb the get rid of, along with the extension of dioxin adsorption unit 711 handling time, only need regularly more renew the adsorption rod that polyimide fiber made, can realize effectively getting rid of the dioxin in the low dust low temperature flue gas.
Further, the cavity of the dioxin adsorption unit 711 is filled with an adsorption rod to remove dioxin in low-dust and low-temperature flue gas.
Specifically, the adsorption rod is a rod body made of polyimide fibers, the polyimide fibers have an irregular trilobal cross-sectional structure, a very high fiber surface area coefficient is formed, the fiber surface area is increased by 80% compared with that of fibers with circular cross sections, the capacity of capturing particles containing dioxin PM2.5 is greatly improved, the filtering efficiency of the dioxin is improved, and the special cross-sectional shape of the polyimide fibers enables the captured particles containing dioxin PM2.5 to be concentrated on the surface of the polyimide fibers, so that gaps inside the polyimide fibers cannot be blocked, and the capacity of continuously capturing particles containing dioxin PM2.5 by the polyimide cannot be reduced.
Specifically, the polyimide fibers are fluffy fibrous materials, if the polyimide fibers are directly filled in the adsorption tower 71, the filling amount of the polyimide fibers is small, and the adsorption effect on the low-dust low-temperature flue gas in the adsorption tower 71 is poor, and if the polyimide fibers are tightly compacted and filled in the adsorption tower 71, the low-dust low-temperature flue gas is blocked and is difficult to pass through the adsorption tower 71, and the adsorption effect of the polyimide fibers on dioxin in the low-dust low-temperature flue gas is poor. The utility model processes the polyimide fiber into a rod body, and then arranges the rod body in the dioxin adsorption unit 711, is beneficial to increase the total amount of the polyimide fibers in the adsorption tower 71, improves the adsorption efficiency of the adsorption tower 71 to the dioxin in the low-dust and low-temperature flue gas, is also beneficial to the replacement of the polyimide fibers, if the dioxin adsorption unit 711 is saturated, the cover 7112 is opened, the old adsorption rod is taken out, a new adsorption rod is put into the adsorption tube 7111, then the cover body 7112 is closed, the efficiency of replacing the polyimide fiber in the adsorption tower 71 is greatly improved, gaps are favorably formed in a plurality of interlayers of the adsorption tower 71, and the gaps in the interlayers are different, so that the flow path of the low-dust and low-temperature flue gas in the adsorption tower 71 from bottom to top is prolonged, so that the low-dust low-temperature flue gas is fully contacted with the dioxin adsorption unit 711 on the circulation path, and the adsorption effect of the dioxin adsorption unit 711 on dioxin in the low-dust low-temperature flue gas is improved.
Among the prior art, the high temperature flue gas heats the cold soft water among the exhaust-heat boiler 31, with cold soft water heating to hot steam, has consumed a large amount of heats in the high temperature flue gas, and the efficiency of exhaust-heat boiler 31 production hot steam is not high.
Referring to fig. 8, as another embodiment, further, the hot water reservoir 55 other end still is connected with reverse osmosis water purifier 103, reverse osmosis water purifier 103 purifies hot water into hot soft water with the impurity of removing hot water, deaerator 104 one end is connected with the reverse osmosis water purifier 103 other end to detach the oxygen in the hot soft water, deaerator 104 other end is connected with exhaust-heat boiler 31 one end, in carrying the hot soft water after the deoxidization to exhaust-heat boiler 31, the high temperature flue gas is direct heats the hot soft water in exhaust-heat boiler 31, in order to heat more hot soft water into hot steam, and hot steam output is efficient, improves the utilization ratio of high temperature flue gas by a wide margin, has effectively utilized the hot water of low temperature flue gas waste heat recovery device production simultaneously, has realized the effective recycle of waste heat in high temperature flue gas and the low temperature flue gas. The hot steam generated by the exhaust-heat boiler 31 is delivered to the steam turbine 105, and the steam turbine 105 drives the generator 106 to generate electricity, so that the energy in the hot steam is converted into electric energy, that is, the heat in the high-temperature flue gas and the low-temperature flue gas is recovered and converted into the electric energy.
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) conveying the low-dust low-temperature flue gas into an adsorption tower 71, wherein a plurality of interlayers are arranged in the adsorption tower 71, and a plurality of dioxin adsorption units 711 are arranged in the interlayers so as to remove dioxin in the low-dust low-temperature flue gas;
6) the method comprises the steps of conveying low-dust low-temperature flue gas without dioxin into a refrigerant evaporator 51, exchanging heat between the low-dust low-temperature flue gas without dioxin and a refrigerant medium in the refrigerant evaporator 51, discharging heat to form low-dust normal-temperature flue gas, evaporating the refrigerant medium in the refrigerant evaporator 51 after absorbing heat, conveying the evaporated refrigerant medium into a gas-liquid separator 52 by the refrigerant evaporator 51 to separate gas from liquid of the evaporated refrigerant medium, conveying a gaseous refrigerant medium into a compressor 53 to compress the gaseous refrigerant medium into a high-temperature high-pressure gaseous refrigerant medium, conveying the high-temperature high-pressure gaseous refrigerant medium into a heat exchanger 54 to exchange heat between the high-temperature high-pressure gaseous refrigerant medium and an external cold water source in the heat exchanger 54 to enable the external cold water to absorb heat to form hot water, and conveying the hot water 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 (8)
1. The utility model provides a get rid of large-scale ore deposit hot stove flue gas waste heat system of recycling of dioxin 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, a dioxin 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 a 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 denitrated to become high-temperature flue gas, and the other end of the desulfurization and denitration device is connected with, the high-temperature flue gas waste heat recovery device cools high-temperature flue gas to enable the high-temperature flue gas to become low-temperature flue gas after being cooled, the other end of the high-temperature flue gas waste heat recovery device is connected with the dust removal device, the dust removal device removes dust from the low-temperature flue gas to enable the low-temperature flue gas to become low-dust low-temperature flue gas after being removed dust, the other end of the dust removal device is connected with one end of the dioxin removal device to convey the low-dust low-temperature flue gas into the dioxin removal device, the dioxin removal device removes dioxin in the low-dust low-temperature flue gas, the other end of the dioxin removal device is connected with one end of the low-temperature flue gas waste heat recovery device to convey the low-dust low-temperature flue gas after being removed dioxin into the low-dust normal-temperature flue gas, one end of the CO removing device is connected with the other end of the low-temperature flue gas waste heat recovery device to remove CO in low-dust normal-temperature flue gas, the other end of the CO removing device is connected with an external chimney to convey the low-dust normal-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 original high-temperature flue gas after incineration into the desulfurization tower, the desulfurization tower carries out desulfurization treatment on the original high-temperature flue gas after incineration, the other end of the desulfurization tower is connected with one end of the denitration tower, the denitration tower carries out denitration treatment on the original high-temperature flue gas after incineration, 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, the device comprises a waste heat boiler, a dust removal device, a low-temperature flue gas waste heat recovery device, a CO removal device and a CO removal device, wherein water in the waste heat boiler is heated into steam, the waste heat of high-temperature flue gas is recycled, 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 low-temperature flue gas, the dioxin removal device is an adsorption tower, the low-temperature flue gas waste heat recovery device comprises a refrigerant evaporator, a gas-liquid separator, a compressor, a heat exchanger and a hot water storage device, the input end of the refrigerant evaporator is connected with the other end of the adsorption tower to convey low-dust low-temperature flue gas subjected to dioxin removal into the refrigerant evaporator, the refrigerant evaporator cools the low-dust low-temperature flue gas subjected to dioxin removal, the first output end of the refrigerant evaporator is connected with one end of the CO removal device to convey the low-dust normal-temperature flue gas into, the gas-liquid separator is used for carrying out gas-liquid separation on the refrigerant medium after being heated and vaporized, one end of the compressor is connected with the other end of the gas-liquid separator, the compressor is used for compressing the gaseous refrigerant medium to enable the gaseous refrigerant medium to become the high-temperature high-pressure gaseous refrigerant medium, one end of the heat exchanger is connected with the other end of the compressor, an external cold water source is connected into the heat exchanger and is in contact with a pipeline through which the high-temperature high-pressure gaseous refrigerant medium flows to carry out heat exchange, the external cold water source is enabled to become hot water after absorbing heat, and the other end of the heat exchanger is connected with the hot water storage device to achieve recycling of.
2. The flue gas waste heat recycling system for large-scale submerged arc furnaces for removing dioxin according to claim 1, characterized in that: a first adjusting valve is further arranged on a flue, connected with the flue gas output end of the large-scale submerged arc furnace, of one end of the combustion chamber, and a second adjusting valve is further arranged on a pipeline, connected with the other end of the adsorption tower, of the refrigerant evaporator input end.
3. The flue gas waste heat recycling system for large-scale submerged arc furnaces for removing dioxin according to claim 1, characterized in that: the pipeline that refrigerant evaporimeter input and the adsorption tower other end are connected still is provided with first temperature sensor, still be provided with the second temperature sensor on the pipeline that the first output of refrigerant evaporimeter and remove CO ware and be connected.
4. The flue gas waste heat recycling system for large-scale submerged arc furnaces for removing dioxin according to claim 1, characterized in that: 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.
5. The flue gas waste heat recycling system for large-scale submerged arc furnaces for removing dioxin according to claim 4, characterized in that: 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.
6. The flue gas waste heat recycling system for large-scale submerged arc furnaces for removing dioxin according to claim 5, characterized in that: 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.
7. The flue gas waste heat recycling system for large-scale submerged arc furnaces for removing dioxin according to claim 1, characterized in that: the utility model discloses a novel adsorption tower, including adsorption tower, be provided with the dioxin adsorption unit in the adsorption tower, the dioxin adsorption unit is provided with a plurality of, the dioxin adsorption unit includes adsorption tube, lid, adsorption tube one end is sealed, and the other end is uncovered, the lid sets up on the uncovered of the adsorption tube other end to make the adsorption tube other end open or closed, a plurality of through-hole has still been seted up on the adsorption tube.
8. The flue gas waste heat recycling system for large-scale submerged arc furnaces for removing dioxin according to claim 7, characterized in that: and an adsorption rod is filled in the cavity of the dioxin adsorption unit to remove dioxin in low-dust and low-temperature flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920391806.6U CN209893968U (en) | 2019-03-26 | 2019-03-26 | Large-scale submerged arc furnace flue gas waste heat recycling system for removing dioxin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920391806.6U CN209893968U (en) | 2019-03-26 | 2019-03-26 | Large-scale submerged arc furnace flue gas waste heat recycling system for removing dioxin |
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| Publication Number | Publication Date |
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| CN209893968U true CN209893968U (en) | 2020-01-03 |
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| CN201920391806.6U Active CN209893968U (en) | 2019-03-26 | 2019-03-26 | Large-scale submerged arc furnace flue gas waste heat recycling system for removing dioxin |
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| Country | Link |
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