CN213253734U - Granule burnt desulfurization weary burnt device of recycling - Google Patents
Granule burnt desulfurization weary burnt device of recycling Download PDFInfo
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- CN213253734U CN213253734U CN202022147161.7U CN202022147161U CN213253734U CN 213253734 U CN213253734 U CN 213253734U CN 202022147161 U CN202022147161 U CN 202022147161U CN 213253734 U CN213253734 U CN 213253734U
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Abstract
The utility model relates to a burnt device of recycling of granule burnt desulfurization exhaustion burnt, including desorber, turbulent motion fluidized bed, the fine coke discharge gate of desorber is connected with the fine coke feed inlet of turbulent motion fluidized bed, and the inside of turbulent motion fluidized bed from top to bottom is separation layer, ammonia entering layer, adsorbed layer, flue gas entering layer respectively, and the turbulent motion fluidized bed position that the ammonia entering layer corresponds sets up ammonia import, fine coke feed inlet, and the turbulent motion fluidized bed position that the flue gas entering layer corresponds sets up the flue gas import. Still include the resolver, turbulent fluidized bed's bottom sets up defeated material structure, and defeated material structure is connected with the resolver. The collision and abrasion of the granular coke cause the abrasion of the granular coke, powdery spent coke is generated, the treatment of coke oven smoke/heating furnace smoke/gas boiler smoke is realized by using the powdery spent coke, the desulfurization efficiency is high, and the low-temperature denitration is realized.
Description
Technical Field
The utility model belongs to the technical field of flue gas desulfurization denitration, concretely relates to burnt device of recycling of granule burnt desulfurization weary coke.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The active coke flue gas treatment technology utilizes the adsorption and catalysis functions of the active coke to ensure that SO in the flue gas2And H2O and O2Reaction to form H2SO4Storing the active coke in the active coke hole; make NOx and NH in the flue gas3Reduction reaction to generate N2And H2O; realize SO in flue gas2And the synergistic control of NOx and the synergistic control of multiple pollutants such as VOCs, HCl, HF, Hg, dioxin and the like can be realized.
Adsorption of SO2The activated coke is heated and regenerated to release high-concentration SO2Gas, regenerated active coke recycled, high concentration SO2Can be processed into sulfuric acid, elemental sulfur, sulfate and other chemical products. Therefore, the activated coke desulfurization and denitrification technology can realize the resource utilization of sulfur and the synergistic removal of multiple pollutants, does not consume water, and is a promising pollutant synergistic control technology.
At present, the desulfurization and denitrification technology of the active coke is popularized and applied in the steel, metallurgy and coking industries in a large scale, and granular formed active coke is adopted. During the adsorption/desorption process of the granular coke, a large amount of new active coke needs to be consumed due to coke loss caused by collision and abrasion of the granules, and meanwhile, powdery spent coke is generated. The powdery spent coke is generated after the granular coke is collided and abraded, belongs to the physical loss of the active coke, has reduced particle size, still has rich specific surface area and pore structure and good adsorption characteristic, but cannot be used in the traditional granular coke adsorption reactor due to the reason of adsorption equipment. At present, powdery spent coke is generally used as fuel, which causes resource waste.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the above-mentioned prior art, the utility model aims at providing a granule burnt desulfurization weary burnt device of recycling.
In order to solve the technical problem, the technical scheme of the utility model is that:
the utility model provides a granule burnt desulfurization weary burnt recycling device, includes desorber, turbulent fluidized bed, and the powdered coke discharge gate of desorber is connected with turbulent fluidized bed's powdered coke feed inlet, and turbulent fluidized bed's inside is separating layer, ammonia entering layer, adsorbed layer, flue gas entering layer from top to bottom respectively, and the turbulent fluidized bed position that ammonia entering layer corresponds sets up ammonia import, powdered coke feed inlet, and the turbulent fluidized bed position that the flue gas entering layer corresponds sets up the flue gas import.
Powdery spent coke (powder coke for short) is obtained in a desorption tower, the granular coke in the desorption tower is collided and abraded to obtain powder coke, then the powder coke enters a turbulent fluidized bed, the powder coke enters an ammonia gas inlet layer in the turbulent fluidized bed to adsorb ammonia gas, the powder coke flows downwards to adsorb NOx and SO in the flue gas2The reduction of NOx is realized under the catalytic action of the active coke to generate N2And H2O。
The utility model discloses one or more technical scheme has following beneficial effect:
a granular coke desulfurization spent coke recycling device is suitable for granular coke desulfurization conditions, and granular coke collision and abrasion cause granular coke abrasion to generateThe powdery spent coke is utilized to realize the treatment of the coke oven flue gas/heating furnace flue gas/gas boiler flue gas, the desulfurization efficiency is high and can reach more than 98 percent, and the requirement of 35mg/Nm is met3Or lower emission standards; low-temperature denitration can be realized, the denitration efficiency can be more than 80% at about 100 ℃, and full-load denitration can be realized; can integrally remove SO2、SO3Various pollutants such as HF, HCl, Hg, dioxin and the like; the system discharges smoke as high-temperature smoke, so that visual pollution such as white smoke and the like cannot occur; the desulfurization by-products of the active coke flue gas can be recycled.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the invention and not to limit the invention unduly.
FIG. 1 is a block diagram of a granular coke desulfurization spent coke recycling apparatus;
FIG. 2 shows SO in the form of granular coke, coke breeze and regenerated coke breeze2An adsorption curve;
FIG. 3 shows SO of granular coke, coke breeze and regenerated coke breeze2Adsorption curve sulfur capacity;
the device comprises a flue gas inlet pipe 1, a flue gas inlet pipe 2, an adsorption tower 3, a desorption tower 4, a turbulent fluidized bed 5, a separation layer 6, an ammonia gas inlet layer 7, an adsorption layer 8, a flue gas inlet layer 9, a resolving device 10, a cyclone separator 11, a material conveying machine 12, a first chimney 13 and a second chimney.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The utility model provides a granule burnt desulfurization weary burnt recycling device, includes desorber, turbulent fluidized bed, and the powdered coke discharge gate of desorber is connected with turbulent fluidized bed's powdered coke feed inlet, and turbulent fluidized bed's inside is separating layer, ammonia entering layer, adsorbed layer, flue gas entering layer from top to bottom respectively, and the turbulent fluidized bed position that ammonia entering layer corresponds sets up ammonia import, powdered coke feed inlet, and the turbulent fluidized bed position that the flue gas entering layer corresponds sets up the flue gas import.
As a further technical scheme, a bag-type dust remover is arranged in the separation layer, an exhaust port is arranged at the top of the separation layer, and the exhaust port is positioned above the bag-type dust remover.
As a further technical scheme, pore plates are arranged among the separation layer, the ammonia gas inlet layer, the adsorption layer and the flue gas inlet layer.
As a further technical scheme, the turbulent fluidized bed further comprises an analysis device, wherein a material conveying structure is arranged at the bottom of the turbulent fluidized bed and is connected with the analysis device.
As a further technical scheme, the device also comprises a cyclone separator, wherein a top exhaust port of the analysis device is connected with the cyclone separator, and a discharge port of the cyclone separator is connected with the analysis device.
As a further technical scheme, the device also comprises an adsorption tower, wherein a discharge port of the adsorption tower is connected with a feed inlet of a desorption tower, and a discharge port of the desorption tower is respectively connected with the adsorption tower and the turbulent fluidized bed.
As a further technical scheme, the device also comprises a material conveying machine, wherein a discharge hole of the analysis tower and a discharge hole of the analysis device are respectively connected with a feed inlet of the material conveying machine, and the discharge hole of the material conveying machine is connected with a feed inlet of the turbulent fluidized bed.
As a further technical scheme, the device also comprises a flue gas inlet pipe, and the flue gas inlet pipe is connected with a gas inlet of the adsorption tower.
As a further technical scheme, the device also comprises a first chimney, and an air outlet of the adsorption tower is connected with the first chimney.
As a further technical scheme, the device also comprises a second chimney, and an air outlet of the separation layer is connected with the second chimney.
As shown in fig. 1, the granular coke desulfurization spent coke recycling device comprises a desorption tower 3 and a turbulent fluidized bed 4, wherein a coke breeze discharge port of the desorption tower 3 is connected with a coke breeze feed inlet of the turbulent fluidized bed 4, the inside of the turbulent fluidized bed 4 is respectively provided with a separation layer 5, an ammonia gas inlet layer 6, an adsorption layer 7 and a flue gas inlet layer 8 from top to bottom, the ammonia gas inlet layer 6 corresponds to the turbulent fluidized bed 4 and is provided with an ammonia gas inlet and a coke breeze feed inlet, and the flue gas inlet layer corresponds to the turbulent fluidized bed.
The adsorption material in the turbulent fluidized bed 4 is mainly coke breeze, the coke breeze is fully adsorbed with ammonia after entering the turbulent fluidized bed 4, then enters the adsorption layer, the flue gas continuously enters the turbulent fluidized bed 4 from the lower part, the flue gas is continuously adsorbed by the coke breeze, NOx and SO in the flue gas2、SO3(Small amount of SO)3And other components) are adsorbed before the flue gas enters the separation layer.
NOx and NH under the catalytic action of active coke (coke breeze)3Is subjected to reduction reaction to generate N2And H2And O. The generated gas enters the separation layer.
SO2And H2Reaction of O to H2SO4And storing the active coke in the active coke pores. Then the coke breeze flows out from the bottom of the turbulent fluidized bed, and the adsorption process is finished.
The coke breeze is generated after the granular coke is collided and abraded, belongs to the physical loss of active coke, has reduced grain diameter, still has rich specific surface area and pore structure, and has good adsorption property. However, due to the adsorption equipment, powdered activated coke cannot be used in conventional granular coke adsorption reactors. (the turbulent fluidized bed is different from the existing adsorption reactor in that it can react with the coke breeze, so it can adapt to the adsorption reaction of the coke breeze).
Therefore, powdery spent coke screened in the traditional granular coke desulfurization and denitrification process can be used as an adsorbent, so that the control of the flue gas sulfur dioxide of other pollution sources in the steel plant is realized, and the system operation cost is reduced.
The reaction in a turbulent bed is as follows: (. in adsorption state)
And (3) desulfurization:
SO2(g)→SO2*
O2(g)→2O*
H2O(g)→H2O*
SO2*+O*→SO3*
SO3*+H2O*→H2SO4*
denitration:
NO(g)→NO*
O2(g)→2O*
NH3(g)→NH3*
NO*+O*→NO2*
8NO2*+6NH3*→7N2+12H2O*。
the turbulent fluidized bed can realize the simultaneous removal of various pollutants and the synergistic removal of SO2NOx, dust, SO3HCl, HF, VOCs, dioxins, heavy metals (Hg).
As shown in fig. 1, the adsorbed gas enters the separation layer 5, and a bag-type dust collector is disposed inside the separation layer 5 to adsorb coke breeze, dust, and the like.
Pore plates are arranged among the separation layer 5, the ammonia gas inlet layer 6, the adsorption layer 7 and the flue gas inlet layer 8. The pore plate plays a role in delaying the flow of the coke breeze and simultaneously plays a supporting role.
Still include analytical equipment 9, turbulent fluidized bed's bottom sets up defeated material structure, and defeated material structure is connected with analytical equipment 9.
The device also comprises a cyclone separator 10, wherein a top exhaust port of the analysis device 9 is connected with the cyclone separator 10, and a discharge port of the cyclone separator 10 is connected with the analysis device 9.
The coke breeze enters the analysis device 9 through the material conveying structure after being adsorbed, and gas SO is realized in the analysis device 9 through heating2、SO3The stripping gas enters the cyclone 10,in the cyclone 10, the fines in the stripping gas fall down and are returned to the stripping apparatus 9. The resolved coke breeze can be reused.
The material conveying structure can be a spiral material conveying machine.
Still include defeated material machine 11, the discharge gate of analysis tower, the discharge gate of analysis device are connected with the feed inlet of defeated material machine 11 respectively, and the discharge gate of defeated material machine 11 is connected with the feed inlet of turbulent fluidized bed 4.
The resolved coke breeze enters a material conveyer 11 and then is recycled into the turbulent fluidized bed 4 for adsorption. The coke breeze obtained in the desorption tower is also conveyed to the turbulent fluidized bed by a material conveyer.
The device is characterized by further comprising an adsorption tower 2, wherein a discharge port of the adsorption tower 2 is connected with a feed inlet of a desorption tower 3, and a discharge port of the desorption tower 3 is respectively connected with the adsorption tower 2 and the turbulent fluidized bed 4. Still include the flue gas and advance the pipe, the flue gas advances the pipe and is connected with the air inlet of adsorption tower.
The adsorption tower is provided with granular coke, and the flue gas conveyed by the flue gas inlet pipe enters the adsorption tower to be adsorbed and then enters the desorption tower to be analyzed to obtain SO2、SO3。
The device also comprises a first chimney 12, and the air outlet of the adsorption tower 2 is connected with the first chimney 12.
And the air outlet of the separation layer 5 is connected with the second chimney 13.
The flue gas passes through the adsorption tower and is discharged into a first chimney 12.
The gas in the separation layer after passing through the bag-type dust collector enters a second chimney 13.
As shown in FIGS. 2 and 3, the desulfurization performance of the granular coke, the coke breeze, and the coke breeze after the desorption/regeneration (regenerated coke breeze) is 40.85mg/g, 33.2mg/g, and 23.23mg/g, respectively, as seen from FIG. 2.
The coke breeze has better adsorption characteristic, and the adsorption rate is 2 to 3 orders of magnitude higher than that of granular coke.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a granule burnt desulfurization weary burnt device of recycling which characterized in that: the device comprises a desorption tower and a turbulent fluidized bed, wherein a powdered coke discharge port of the desorption tower is connected with a powdered coke feed inlet of the turbulent fluidized bed, a separation layer, an ammonia gas inlet layer, an adsorption layer and a flue gas inlet layer are respectively arranged in the turbulent fluidized bed from top to bottom, the turbulent fluidized bed corresponding to the ammonia gas inlet layer is provided with an ammonia gas inlet and a powdered coke feed inlet, and the turbulent fluidized bed corresponding to the flue gas inlet layer is provided with a flue gas inlet.
2. The apparatus for recycling spent coke from desulfurization of particulate coke as claimed in claim 1, wherein: the bag-type dust remover is arranged in the separation layer, the exhaust port is arranged at the top of the separation layer, and the exhaust port is located above the bag-type dust remover.
3. The apparatus for recycling spent coke from desulfurization of particulate coke as claimed in claim 1, wherein: and pore plates are arranged among the separation layer, the ammonia gas inlet layer, the adsorption layer and the flue gas inlet layer.
4. The apparatus for recycling spent coke from desulfurization of particulate coke as claimed in claim 1, wherein: still include the resolver, turbulent fluidized bed's bottom sets up defeated material structure, and defeated material structure is connected with the resolver.
5. The apparatus for recycling the desulfurized spent coke from the particulate coke of claim 4, wherein: the device also comprises a cyclone separator, wherein a top exhaust port of the analysis device is connected with the cyclone separator, and a discharge port of the cyclone separator is connected with the analysis device.
6. The apparatus for recycling the desulfurized spent coke from the particulate coke of claim 4, wherein: still including defeated material machine, the discharge gate of analysis tower, analytical equipment's discharge gate are connected with the feed inlet of defeated material machine respectively, and the discharge gate of defeated material machine is connected with the feed inlet of turbulent fluidized bed.
7. The apparatus for recycling spent coke from desulfurization of particulate coke as claimed in claim 1, wherein: the device also comprises an adsorption tower, a discharge port of the adsorption tower is connected with a feed inlet of a desorption tower, and a discharge port of the desorption tower is respectively connected with the adsorption tower and the turbulent fluidized bed.
8. The apparatus for recycling the desulfurized spent coke from the particulate coke of claim 7, wherein: still include the flue gas and advance the pipe, the flue gas advances the pipe and is connected with the air inlet of adsorption tower.
9. The apparatus for recycling the desulfurized spent coke from the particulate coke of claim 7, wherein: the gas outlet of the adsorption tower is connected with the first chimney.
10. The apparatus for recycling spent coke from desulfurization of particulate coke as claimed in claim 1, wherein: the air outlet of the separation layer is connected with the second chimney.
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| CN202022147161.7U CN213253734U (en) | 2020-09-25 | 2020-09-25 | Granule burnt desulfurization weary burnt device of recycling |
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