CN215975686U - Blast furnace gas desulfurizing tower - Google Patents
Blast furnace gas desulfurizing tower Download PDFInfo
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- CN215975686U CN215975686U CN202122695052.3U CN202122695052U CN215975686U CN 215975686 U CN215975686 U CN 215975686U CN 202122695052 U CN202122695052 U CN 202122695052U CN 215975686 U CN215975686 U CN 215975686U
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Abstract
The utility model relates to a blast furnace gas desulfurization tower, which comprises a tower body, wherein a plurality of desulfurization sections capable of independently desulfurizing blast furnace gas are formed on the tower body in the vertical direction, each desulfurization section is respectively provided with a gas inlet and a gas outlet, a plurality of packing layers are arranged between the gas inlet and the gas outlet of the corresponding desulfurization section in each desulfurization section, and each packing layer is respectively filled with an adsorption material which has adsorption capacity and can be desorbed and regenerated after being heated. The utility model solves the technical problems of high cost, large occupied area of equipment and poor use effect for removing sulfides in blast furnace gas.
Description
Technical Field
The utility model relates to the field of blast furnace gas treatment, in particular to a blast furnace gas desulfurization tower.
Background
Blast furnace gas is a byproduct generated in an iron-making process, and is colorless, tasteless and combustible; in addition, the method has the characteristics of low heat value, large gas production rate, high organic sulfur content and the like. The desulfurization of blast furnace gas requires the removal of inorganic sulfur (such as H)2S), and organic sulfur removal (e.g.: COS, CS2Etc.), wherein hydrogen sulfide is relatively easy to remove, while organic sulfur is difficult to remove.
After pressure energy and heat energy are recovered, blast furnace gas is used as fuel to be combusted, and the discharged flue gas mainly contains SO2Generally, the content is 45mg/m3To 185mg/m3And meanwhile, the waste gas is required to be purified and then discharged after reaching the standard. With the strict environmental protection requirement, SO in the flue gas2Emission limit of 35mg/m3. The traditional desulfurization method is mainly tail end treatment, and flue gas desulfurization is arranged behind each user point, so that the defects of more desulfurization facilities, large floor area, difficult management, more desulfurization byproducts, secondary pollution, large investment, large water consumption and the like are caused; the blast furnace gas source treatment generally adopts hydrolysis to convert organic sulfur into inorganic sulfur and then adopts a wet method to remove hydrogen sulfide, and has the defects of large resistance loss, large water consumption, difficult treatment of secondary salt and the like.
Aiming at the problems of high cost, large equipment floor area and poor use effect in the prior art of removing sulfides in blast furnace gas, no effective solution is provided at present.
Therefore, the inventor provides the blast furnace gas desulfurization tower by virtue of experience and practice of related industries for many years so as to overcome the defects in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a blast furnace gas desulfurization tower which adopts a multilayer structure, has compact and flexible layout, greatly reduces the occupied area, can remove inorganic sulfur and organic sulfur in the blast furnace gas, improves the treatment efficiency of the blast furnace gas, reduces the treatment cost of the blast furnace gas and avoids secondary pollution.
The purpose of the utility model can be realized by adopting the following technical scheme:
the utility model provides a blast furnace gas desulfurization tower which comprises a tower body, wherein a plurality of desulfurization sections capable of independently performing desulfurization treatment on blast furnace gas are formed on the tower body in the vertical direction, each desulfurization section is respectively provided with a gas inlet and a gas outlet, a plurality of packing layers are arranged between the gas inlet and the gas outlet of the corresponding desulfurization section in each desulfurization section, and each packing layer is respectively filled with an adsorption material which has adsorption capacity and can be desorbed and regenerated after being heated.
In a preferred embodiment of the present invention, the packing layer includes a packing support structure, the packing support structure is connected to the inner wall of the tower body, and the adsorbing material is packed on the top of the packing support structure.
In a preferred embodiment of the present invention, the packing support structure is a baffle or a screen.
In a preferred embodiment of the present invention, the height of each filler layer is greater than or equal to 300mm and less than or equal to 2500 mm; the adsorbing materials filled in the filler layers are spherical, strip-shaped and/or honeycomb-shaped.
In a preferred embodiment of the present invention, the desulfurization section includes an upper desulfurization section and a lower desulfurization section, the bottom of the upper desulfurization section is connected to the top of the lower desulfurization section through an external cylinder, the bottom of the lower desulfurization section is provided with a skirt, and the skirt is provided with a skirt inspection hole.
In a preferred embodiment of the present invention, the external cylinder is a cylindrical structure with two open ends arranged along a vertical direction, the top end of the external cylinder is connected to the bottom outer wall of the upper desulfurization section, the bottom end of the external cylinder is connected to the top outer wall of the lower desulfurization section, and the external cylinder is provided with an inspection manhole.
In a preferred embodiment of the present invention, the upper desulfurization section includes an upper cylinder, a first upper cylinder end enclosure and a second upper cylinder end enclosure, the upper cylinder is a cylindrical structure with two open ends arranged along a vertical direction, a cross section of the first upper cylinder end enclosure is in an upward-protruding arc shape or an acute angle shape, a cross section of the second upper cylinder end enclosure is in a downward-protruding arc shape or an acute angle shape, the first upper cylinder end enclosure and the second upper cylinder end enclosure are respectively sealed at a top end opening and a bottom end opening of the upper cylinder, the plurality of packing layers are sequentially arranged in the upper cylinder at intervals from bottom to top along the vertical direction, an upper cylinder air outlet is arranged at a middle position of a top of the first upper cylinder end enclosure, and an upper cylinder air inlet is arranged on a bottom side wall of the upper cylinder.
In a preferred embodiment of the present invention, an upper cylinder air inlet pipe extending along a horizontal direction is disposed at the upper cylinder air inlet, one end of the upper cylinder air inlet pipe is located outside the upper cylinder, the other end of the upper cylinder air inlet pipe extends into the upper cylinder, a cross section of the upper cylinder air inlet pipe is an oblique opening which gradually inclines towards an inner wall of the upper cylinder from top to bottom, and a length of the upper cylinder air inlet pipe extending into the upper cylinder is smaller than a radius of the upper cylinder.
In a preferred embodiment of the utility model, a sewage draining outlet is arranged in the middle of the bottom of the second upper cylinder end enclosure, and an upper cylinder sewage draining pipe is connected to the sewage draining outlet.
In a preferred embodiment of the present invention, an upper cylinder charging port is respectively disposed on the sidewall of the upper cylinder at a position corresponding to the upper portion of the packing layer and on the top of the first upper cylinder end enclosure.
In a preferred embodiment of the present invention, the side wall of the upper cylinder body is provided with an upper cylinder temperature and pressure measuring port at a position corresponding to the upper portion of the packing layer and the top of the first upper cylinder sealing head, and each of the upper cylinder temperature and pressure measuring ports is provided with a temperature and pressure measuring device.
In a preferred embodiment of the utility model, the lower desulfurization section comprises a lower barrel, a partition plate and a lower barrel end enclosure, the lower barrel is a cylindrical structure with openings at two ends arranged along the vertical direction, the cross section of the lower barrel end enclosure is in an arc shape or a pointed shape protruding downwards, the partition plate and the lower barrel end enclosure are respectively plugged at the opening at the top end and the opening at the bottom end of the lower barrel, a plurality of packing layers are sequentially arranged in the lower barrel from bottom to top at intervals along the vertical direction, and a lower barrel air outlet and a lower barrel air inlet are respectively arranged on the top side wall and the bottom side wall of the lower barrel.
In a preferred embodiment of the present invention, a lower cylinder air inlet pipe extending along a horizontal direction is disposed at the lower cylinder air inlet, one end of the lower cylinder air inlet pipe is located outside the lower cylinder, the other end of the lower cylinder air inlet pipe extends into the lower cylinder, a cross section of the lower cylinder air inlet pipe is an oblique opening which gradually inclines towards an inner wall of the lower cylinder from top to bottom, and a length of the lower cylinder air inlet pipe extending into the lower cylinder is smaller than a radius of the lower cylinder.
In a preferred embodiment of the utility model, a sewage draining outlet is arranged in the middle of the bottom of the lower cylinder end enclosure, and a lower cylinder sewage draining pipe is connected to the sewage draining outlet.
In a preferred embodiment of the present invention, the side wall of the lower cylinder is provided with a lower cylinder charging port at a position corresponding to the position above the packing layer.
In a preferred embodiment of the present invention, the side wall of the lower cylinder body is provided with lower cylinder temperature and pressure measuring ports at positions corresponding to the upper portion of the packing layer, and each of the lower cylinder temperature and pressure measuring ports is provided with a temperature and pressure measuring device.
In a preferred embodiment of the present invention, the tower body is made of carbon steel, and the inner wall of the tower body is coated with a high temperature resistant and corrosion resistant layer, and the outer wall of the tower body is provided with an insulating layer.
From the above, the blast furnace gas desulfurization tower of the present invention has the characteristics and advantages that: the tower body is provided with a plurality of desulfurization sections, a plurality of packing layers are respectively arranged inside each desulfurization section, and each desulfurization section can independently perform desulfurization treatment on blast furnace gas introduced into the desulfurization sections in the working process, so that the aim of desulfurization is fulfilled, the layered layout is realized, the structure is compact and flexible, and the occupied area is effectively reduced; in addition, the packing layers respectively adsorb and remove the sulfides in the blast furnace gas through the adsorbing materials, so that the inorganic sulfur and the organic sulfur in the blast furnace gas can be removed, the treatment efficiency of the blast furnace gas is improved, the treatment cost of the blast furnace gas is reduced, secondary pollution is avoided, the adsorbing materials have the capability of desorption and regeneration after heating, the adsorbed sulfides and other impurities can be desorbed into the desorption gas through heating, the requirement for repeated use is met, the use cost is effectively reduced, and the method is suitable for popularization and use.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1: is a schematic structural diagram of the blast furnace gas desulfurization tower.
FIG. 2: is a schematic structural diagram of an upper desulfurization section in the blast furnace gas desulfurization tower.
FIG. 3: is a schematic structural diagram of the lower desulfurization section in the blast furnace gas desulfurization tower.
The reference numbers in the utility model are:
1. a tower body; 101. An upper desulfurization section;
1011. an upper cylinder body; 1012. A first upper cylinder end enclosure;
1013. a second upper cylinder end enclosure; 1014. An upper cylinder air inlet;
1015. an air outlet of the upper cylinder; 1016. An upper barrel blow-off pipe;
1017. an upper barrel charging port; 1018. An upper barrel temperature and pressure measuring port;
1019. an upper cylinder air inlet pipe; 102. A lower desulfurization section;
1021. a lower cylinder body; 1022. A partition plate;
1023. sealing the lower cylinder; 1024. A lower cylinder air inlet;
1025. an air outlet of the lower cylinder; 1026. A lower barrel blow-off pipe;
1027. a lower barrel charging port; 1028. A lower barrel temperature and pressure measuring port;
1029. a lower cylinder air inlet pipe; 103. The cylinder body is externally connected;
1031. an inspection manhole; 2. A filler layer;
201. a filler support structure; 3. A skirt;
301. skirt inspection holes.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a blast furnace gas desulfurization tower, which comprises a tower body 1, wherein a plurality of desulfurization sections capable of independently desulfurizing blast furnace gas are formed in the vertical direction of the tower body 1, each desulfurization section is provided with a gas inlet and a gas outlet communicated with the inside of the tower body 1, a plurality of packing layers 2 are arranged between the gas inlet and the gas outlet of each desulfurization section from the gas inlet of the corresponding desulfurization section, each packing layer is filled with an adsorption material having adsorption capacity and capable of desorption regeneration after heating, and the adsorption material in each packing layer 2 is used for removing sulfides (including organic sulfur and inorganic sulfur) in the blast furnace gas introduced into each desulfurization section.
In the utility model, a plurality of desulfurization sections are formed on the tower body 1, a plurality of packing layers 2 are respectively arranged inside each desulfurization section, and each desulfurization section can independently carry out desulfurization treatment on blast furnace gas introduced into the desulfurization section in the working process, thereby not only achieving the aim of desulfurization, but also having layered layout, compact and flexible structure and effectively reducing the occupied area. In addition, the absorbing material is respectively used for absorbing and removing the sulfide in the blast furnace gas on each packing layer 2, so that the inorganic sulfur and the organic sulfur in the blast furnace gas can be removed, the treatment efficiency of the blast furnace gas is improved, the treatment cost of the blast furnace gas is reduced, the secondary pollution is avoided, the absorbing material has the capability of desorption and regeneration after heating, and the absorbed sulfide and other impurities can be desorbed into the desorption gas through heating, so that the requirement of repeated use is met, the use cost is effectively reduced, and the method is suitable for popularization and use.
In an alternative embodiment of the present invention, as shown in fig. 1 to 3, the packing layer 2 comprises a packing support structure 201, the packing support structure 201 is connected with the inner wall of the tower body 1, and the adsorbing material is packed on the top of the packing support structure 201. Wherein the packing support structure 201 may be, but is not limited to, a baffle or a screen.
Further, the tower body 1 can be made of carbon steel, but is not limited to, and the inner wall of the tower body 1 is coated with a high-temperature-resistant anticorrosive layer formed by anticorrosive paint, so that the strength and the corrosion resistance of the tower body 1 are effectively ensured, and the service cycle of the tower body 1 is prolonged. The outer wall of the tower body 1 is provided with a heat preservation layer to improve the heat preservation capability of the tower body 1.
In an alternative embodiment of the utility model, the height of each packing layer 2 is greater than or equal to 300mm and less than or equal to 2500mm (i.e. the height is greater than or equal to 300mm and less than or equal to 2500mm), so that a space is reserved between two adjacent packing layers 2 to ensure that sulfides in the blast furnace gas are fully adsorbed.
Furthermore, the adsorbing materials filled in each filler layer 2 are spherical, strip-shaped and/or honeycomb-shaped. The honeycomb-shaped adsorbing material has the characteristics of low resistance loss and short retention time; the spherical and strip-shaped adsorbing materials have the characteristics of large specific surface area, long retention time and large resistance loss. According to the utility model, the adsorbing materials filled in the packing layer 2 positioned at the lowest part are spherical or strip-shaped, the adsorbing materials filled in other packing layers 2 are spherical, strip-shaped and/or honeycomb-shaped in any shape, sulfides in the blast furnace gas are fully adsorbed and removed by the adsorbing materials in the packing layer 2 at the lowest part, and then the remaining sulfides in the blast furnace gas are adsorbed and removed by the adsorbing materials in other packing layers 2, so that a good desulfurization effect is ensured. Of course, the shape of the adsorbent in each packing layer 2 may be adjusted as necessary to ensure sufficient adsorption of the sulfides in the blast furnace gas.
In the present invention, the adsorbing material may be made of a material containing at least one element selected from the group consisting of magnesium, calcium, strontium, yttrium, lanthanum, cerium, europium, iron, cobalt, nickel, copper, silver, and zinc.
Further, the adsorbing material is a hydrophobic microcrystalline material which is selected from at least one of an X-type molecular sieve, a Y-type molecular sieve, an A-type molecular sieve, a ZSM-type molecular sieve, mordenite, a beta-type molecular sieve, an MCM-type molecular sieve and a SAPO-type molecular sieve. Wherein the catalyst for converting organic sulfur into inorganic sulfur comprises Fe-Co-Mn-Mo-Ni catalyst, CO-K-Al2O3And ZrO2/TiO2Is at least one of the catalysts.
Specifically, the adsorption material can adopt a copper-modified ZSM-5 molecular sieve material or a zinc-modified ZSM-5 molecular sieve material, wherein the silicon-aluminum ratio of the molecular sieve material is 150, a ZSM type molecular sieve adsorbent and the like, wherein the ZSM-type molecular sieve adsorbent contains a cobalt-molybdenum-nickel catalyst. The adsorption material has the capacity of adsorbing organic sulfur and inorganic sulfur in the temperature range of 20-80 ℃, and has the capacity of desorption regeneration in the temperature range of 160-350 ℃. The adsorbent material is hydrophobic and does not absorb moisture.
In an alternative embodiment of the present invention, as shown in fig. 1, the desulfurization section includes an upper desulfurization section 101 and a lower desulfurization section 102, the bottom of the upper desulfurization section 101 is connected with the top of the lower desulfurization section 102 through an external cylinder 103, the bottom of the lower desulfurization section 102 is provided with a skirt 3, and the skirt 3 is provided with a skirt inspection hole 301 for the inspection and maintenance of workers.
Specifically, as shown in fig. 1, the external cylinder 103 is a cylindrical structure with two open ends arranged along the vertical direction, the top end of the external cylinder 103 is welded to the bottom outer wall of the upper desulfurization section 101, the bottom end of the external cylinder 103 is welded to the top outer wall of the lower desulfurization section 102, and the external cylinder 103 is provided with an inspection manhole 1031 for the inspection and maintenance of workers. In addition, the lower desulfurization section 102 is welded and fixed with the top of the skirt 3, and the bottom of the skirt 3 is stably placed on the installation plane.
In an alternative embodiment of the present invention, as shown in fig. 1 and fig. 2, the upper desulfurization section 101 includes an upper cylinder 1011, a first upper cylinder head 1012 and a second upper cylinder head 1013, the upper cylinder 1011 is a cylindrical structure with two open ends arranged in a vertical direction, the first upper cylinder head 1012 is plugged at an opening at the top end of the upper cylinder 1011, the second upper cylinder head 1013 is plugged at an opening at the bottom end of the upper cylinder 1011, an upper cylinder air outlet 1015 (i.e., an air outlet) is arranged at a middle position of the top of the first upper cylinder head 1012, an upper cylinder air inlet 1014 (i.e., an air inlet) is arranged on a sidewall at the bottom of the upper cylinder 1011, and the plurality of packing layers 2 are sequentially arranged in the upper cylinder 1011 from bottom to top at intervals in the vertical direction.
Further, the upper cylinder 1011, the first upper cylinder head 1012 and the second upper cylinder head 1013 are welded and fixed, so that the stability of the tower body 1 is effectively improved.
Further, as shown in fig. 1 and 2, the cross section of the first upper cylinder head 1012 is an arc shape or an acute angle shape protruding upward, and the cross section of the second upper cylinder head 1013 is an arc shape or an acute angle shape protruding downward (when the cross section of the second upper cylinder head 1013 is an acute angle shape protruding downward, the included angle between the second upper cylinder head 1013 and the horizontal direction is 25 °), so that the first upper cylinder head 1012 has a drainage effect on the blast furnace gas, the gas can be smoothly discharged, and the second upper cylinder head 1013 facilitates outward pollution discharge.
In an alternative embodiment of the present invention, as shown in fig. 1 and 2, an upper cylinder air inlet pipe 1019 extending in a horizontal direction is fixedly disposed at an upper cylinder air inlet 1014, one end of the upper cylinder air inlet pipe 1019 is located outside the upper cylinder 1011, the other end of the upper cylinder air inlet pipe 1019 extends into the upper cylinder 1011, and a cross section of the end of the upper cylinder air inlet pipe 1019 is an oblique opening which is gradually inclined toward the inner wall of the upper cylinder 1011 from top to bottom, so that disturbance capacity to the gas is increased through the oblique opening of the upper cylinder air inlet pipe 1019 in a process that the blast furnace gas enters the upper cylinder 1011, so that the blast furnace gas is uniformly dispersed after entering the upper cylinder 1011, thereby improving a treatment effect on the blast furnace gas. Because the purpose of desulfurization is achieved by adsorbing sulfides in the blast furnace gas through the adsorbing material, the optimal adsorption effect can be achieved only by ensuring that the blast furnace gas is uniformly and fully contacted with the adsorbing material, and in the utility model, the effect can be achieved only by arranging the inclined opening at the end, extending into the upper cylinder 1011, of the upper cylinder air inlet pipe 1019, so that the full desulfurization of the adsorption desulfurization tower 1 is realized.
Further, as shown in fig. 1 and 2, the length of the upper cylinder air inlet pipe 1019 extending into the upper cylinder 1011 is smaller than the radius of the upper cylinder 1011, so that the blast furnace gas can be dispersed in the upper cylinder 1011 along the flow direction thereof after entering the upper cylinder 1011, thereby improving the uniformity of the dispersion of the blast furnace gas in the upper cylinder 1011.
Further, the inclined angle of the inclined opening of the upper cylinder inlet pipe 1019 may be, but is not limited to, 60 ℃.
In an alternative embodiment of the present invention, as shown in fig. 1 and 2, a sewage draining exit is disposed at the middle position of the bottom of the second upper cylinder end enclosure 1013, the sewage draining exit is connected to an upper cylinder sewage draining pipe 1016, and a three-way valve is installed on the upper cylinder sewage draining pipe 1016, so that not only can sewage in the upper cylinder 1011 be drained, but also impurities in the upper cylinder sewage draining pipe 1016 can be removed, and a long-term conduction state of the upper cylinder sewage draining pipe 1016 can be ensured.
In an alternative embodiment of the utility model, as shown in fig. 1 and fig. 2, upper cylinder charging ports 1017 communicated with the inside of the upper cylinder 1011 along the horizontal direction are respectively arranged on the side wall of the upper cylinder 1011 at positions corresponding to the upper part of the filler layer 2, the top of the first upper cylinder end enclosure 1012 is provided with the upper cylinder charging ports 1017 communicated with the inside of the upper cylinder 1011 along the vertical direction, the diameter of each upper cylinder charging port 1017 is larger than or equal to 600mm (namely, the diameter DN is larger than or equal to 600mm), smooth entering of the upper cylinder 1011 during charging of the adsorption material is ensured, and each upper cylinder charging port 1017 can also be used as a manhole, so that the inspection and maintenance of workers are facilitated.
In an alternative embodiment of the present invention, as shown in fig. 1 and fig. 2, an upper cylinder temperature and pressure measuring port 1018 is respectively disposed on the side wall of the upper cylinder 1011 at a position corresponding to the upper side of the packing layer 2 and on the top of the first upper cylinder head 1012, and a temperature and pressure measuring device is respectively disposed at each upper cylinder temperature and pressure measuring port 1018. The temperature and the pressure of the positions of different packing layers 2 in the upper cylinder 1011 are respectively detected in real time by the temperature and pressure measuring devices, and the temperature and pressure measuring devices have the functions of remote transmission and online display. Wherein, the temperature range needs to be controlled between-10 ℃ and 500 ℃, and the pressure range needs to be controlled between 0 MPa and 0.1MPa, so that the adsorption and desorption regeneration operation of the adsorption material in the upper cylinder 1011 can be adjusted according to the temperature and pressure parameters.
In an alternative embodiment of the present invention, as shown in fig. 1 and fig. 3, the lower desulfurization section 102 includes a lower cylinder 1021, a partition 1022, and a lower cylinder end enclosure 1023, where the lower cylinder 1021 is a cylindrical structure with two open ends arranged in a vertical direction, the partition 1022 is plugged at an opening at a top end of the lower cylinder 1021 in a horizontal direction, the lower cylinder end enclosure 1023 is plugged at an opening at a bottom end of the lower cylinder 1021, a lower cylinder air outlet 1025 (i.e., an air outlet) is arranged on a top side wall of the lower cylinder 1021, a lower cylinder air inlet 1024 (i.e., an air inlet) is arranged on a bottom side wall of the lower cylinder 1021, and a plurality of packing layers 2 are sequentially arranged in the lower cylinder 1021 from bottom to top at intervals in the vertical direction.
Further, all through welded fastening between lower barrel 1021 and baffle 1022 and the lower cylinder head 1023, effectively improve the stability of tower body 1.
Further, as shown in fig. 1 and 3, the partition 1022 is a flat plate-shaped structure disposed along the horizontal direction, and the cross section of the lower cylinder head 1023 is an arc shape or a sharp angle shape protruding downward, so that the lower cylinder head 1023 facilitates outward pollution discharge.
In an alternative embodiment of the present invention, as shown in fig. 1 and fig. 2, a lower barrel gas inlet 1029 extending in a horizontal direction is fixedly disposed at a lower barrel gas inlet 1024, one end of the lower barrel gas inlet 1029 is located outside the lower barrel 1021, the other end of the lower barrel gas inlet 1029 extends into the lower barrel 1021, and a cross section of the end of the lower barrel gas inlet 1029 is an oblique opening which is inclined from top to bottom toward an inner wall of the lower barrel 1021, so that in a process that blast furnace gas enters the lower barrel 1021, a disturbance capability to the gas is increased through the oblique opening of the lower barrel gas inlet 1029, so that the blast furnace gas is uniformly dispersed after entering the lower barrel 1021, so as to improve a treatment effect on the blast furnace gas. Because the purpose of desulfurization is achieved by adsorbing sulfides in the blast furnace gas through the adsorbing material, the optimal adsorption effect can be achieved only by ensuring that the blast furnace gas is uniformly and fully contacted with the adsorbing material, and in the utility model, the effect can be achieved only by arranging the inclined opening at the end, extending into the lower barrel 1021, of the lower barrel gas inlet pipe 1029, so that the full desulfurization of the adsorption desulfurization tower 1 is realized.
Further, as shown in fig. 1 and 3, the length of the lower barrel gas inlet pipe 1029 extending into the lower barrel 1021 is smaller than the radius of the lower barrel 1021, so that the blast furnace gas can be dispersed in the lower barrel 1021 along the flow direction of the blast furnace gas after entering the lower barrel 1021, and the uniformity of the dispersion of the blast furnace gas in the lower barrel 1021 is improved.
Further, the inclined angle of the inclined opening of the lower barrel air inlet tube 1029 may be, but is not limited to, 60 ℃.
In an alternative embodiment of the present invention, as shown in fig. 1 and fig. 3, a sewage draining exit is arranged in the middle of the bottom of the lower cylinder sealing head 1023, the sewage draining exit is connected with a lower cylinder sewage draining pipe 1026, and the lower cylinder sewage draining pipe 1026 is provided with a three-way valve, so that not only can sewage in the lower cylinder 1021 be drained, but also impurities in the lower cylinder sewage draining pipe 1026 can be removed, and a long-term conduction state of the lower cylinder sewage draining pipe 1026 is ensured.
In an alternative embodiment of the present invention, as shown in fig. 1 and 3, a lower cartridge charging port 1027 horizontally communicating with the interior of the lower cartridge 1021 is respectively disposed at a position on the sidewall of the lower cartridge 1021 above the packing layer 2, the diameter of each lower cartridge charging port 1027 is greater than or equal to 600mm (i.e., the diameter DN is greater than or equal to 600mm), so as to ensure that the adsorbing material can smoothly enter the lower cartridge 1021 during loading, and each lower cartridge charging port 1027 can also be used as a manhole, thereby facilitating the inspection and maintenance of workers.
In an alternative embodiment of the present invention, as shown in fig. 1 and 3, the side wall of the lower cylinder 1021 at a position corresponding to the upper portion of the packing layer 2 is provided with a lower cylinder temperature and pressure measuring port 1028, and each lower cylinder temperature and pressure measuring port 1028 is provided with a temperature and pressure measuring device. The temperature and the pressure of the positions of different packing layers 2 in the lower barrel 1021 are respectively detected in real time through the temperature and pressure measuring devices, and the temperature and pressure measuring devices have the functions of remote transmission and online display. Wherein, the temperature range needs to be controlled between minus 10 ℃ and 500 ℃, and the pressure range needs to be controlled between 0 MPa and 0.1MPa, so that the adsorption and desorption regeneration operation of the adsorption material in the barrel 1021 is adjusted according to the temperature and pressure parameters.
Further, the temperature and pressure measuring device can be, but is not limited to, a temperature sensor and a pressure sensor which are used together.
The working process of the blast furnace gas desulfurization tower comprises the following steps: because the temperature of the TRT inlet is generally between 150 ℃ and 210 ℃ and the temperature of the gas outlet is between 80 ℃ and 120 ℃ (most of the TRT inlet is about 100 ℃ and the highest temperature can reach 150 ℃), and the optimal active adsorption temperature of the adsorption material is between 50 ℃ and 80 ℃, the blast furnace gas with the temperature higher than 80 ℃ needs to be cooled by a spray cooling device before entering the tower body 1, so that the temperature of the blast furnace gas is reduced to be lower than 80 ℃, and then the blast furnace gas respectively enters the upper cylinder 1011 and the lower cylinder 1021 through the upper cylinder inlet 1014 and the lower cylinder inlet 1024. The water in the blast furnace gas forms condensed water in the tower body 1 and is discharged outside through the upper barrel sewage discharge pipe 1016 and the lower barrel sewage discharge pipe 1026 respectively so as to reduce the water content in the gas of the end user. The blast furnace gas entering the upper cylinder 1011 and the lower cylinder 1021 passes through the packing layers 2 from bottom to top, and the adsorbing materials in the packing layers 2 in the process are used for adsorbing H in the blast furnace gas2S, organic sulfur, Cl < - > and dust and other impurities are adsorbed, and the purified blast furnace gas is discharged from an upper barrel gas outlet 1015 and a lower barrel gas outlet 1025 respectively and is sent to an end user for use. When the adsorption material needs to be desorbed and regenerated, the adsorption material in only one desulfurization section is always ensured to be desorbed and regenerated, the adsorption materials in other desulfurization sections are in a normal adsorption state, and in the process, a small amount of clean blast furnace gas (about 2000 m) needs to be extracted3H is 6000m3H) is heated to 160-350 ℃, and then is introduced into the desulfurization section needing desorption and regeneration from the gas outlet on the desulfurization section, and part of the clean blast furnace coal passes through the desulfurization sectionThe gas heats the adsorbing materials in each packing layer 2, the temperature and the pressure at the corresponding positions in the desulfurization section are detected in real time through each temperature and pressure measuring device, when the detected temperature reaches the set temperature, heat preservation is carried out, the high-temperature clean blast furnace gas takes out the impurities adsorbed in the adsorbing materials, so that the adsorbing materials can be desorbed and regenerated, the desorbed blast furnace gas and harmful gas are discharged from the gas inlet of the desulfurization section to the outside, and the gas is sent to a sintering section for subsequent combustion and other treatments. Wherein: in the desorption regeneration process, the heat of the adsorption material is preserved for about 1 day after the adsorption material is heated, then the adsorption material is cooled, and the adsorption material is regenerated after being cooled and can be repeatedly used.
The blast furnace gas desulfurization tower has the characteristics and advantages that:
firstly, each desulfurization section in the blast furnace gas desulfurization tower is layered and distributed, thereby not only achieving the purpose of desulfurization, but also having compact and flexible structure and effectively reducing the occupied area.
Secondly, in the blast furnace gas desulfurization tower, the adsorbing material (especially the hydrophobic adsorbing material) is adopted to adsorb the sulfide in the blast furnace gas, so that the inorganic sulfur and the organic sulfur can be removed, the operation is simple, the secondary pollution is avoided, and the blast furnace gas desulfurization tower is suitable for popularization and use.
In the blast furnace gas desulfurization tower, the specific shapes of the adsorbing materials in the packing layers 2 can be flexibly matched, and the blast furnace gas desulfurization tower has the advantages of small resistance loss and high efficiency.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the utility model should fall within the protection scope of the utility model.
Claims (17)
1. The blast furnace gas desulfurization tower is characterized by comprising a tower body, wherein a plurality of desulfurization sections capable of independently performing desulfurization treatment on blast furnace gas are formed on the tower body in the vertical direction, each desulfurization section is provided with a gas inlet and a gas outlet, a plurality of packing layers are arranged between the gas inlet and the gas outlet of the corresponding desulfurization section in each desulfurization section, and each packing layer is filled with an adsorption material which has adsorption capacity and can be desorbed and regenerated after being heated.
2. The blast furnace gas desulfurization tower of claim 1, wherein the packing layer comprises a packing support structure, the packing support structure is connected with the inner wall of the tower body, and the adsorption material is packed on the top of the packing support structure.
3. The blast furnace gas desulfurization tower of claim 2, wherein the packing support structure is a baffle or a screen.
4. The blast furnace gas desulfurization tower of claim 1, wherein the height of each packing layer is greater than or equal to 300mm and less than or equal to 2500 mm; the adsorbing materials filled in the filler layers are spherical, strip-shaped and/or honeycomb-shaped.
5. The blast furnace gas desulfurization tower of claim 1, wherein the desulfurization section comprises an upper desulfurization section and a lower desulfurization section, the bottom of the upper desulfurization section is connected with the top of the lower desulfurization section through an external cylinder, the bottom of the lower desulfurization section is provided with a skirt, and the skirt is provided with a skirt inspection hole.
6. The blast furnace gas desulfurization tower according to claim 5, wherein the external cylinder has a cylindrical structure with two open ends arranged in a vertical direction, the top end of the external cylinder is connected with the outer wall of the bottom of the upper desulfurization section, the bottom end of the external cylinder is connected with the outer wall of the top of the lower desulfurization section, and the external cylinder is provided with an inspection manhole.
7. The blast furnace gas desulfurization tower of claim 5, wherein the upper desulfurization section comprises an upper barrel, a first upper barrel head and a second upper barrel head, the upper barrel is a barrel-shaped structure with two open ends arranged along the vertical direction, the cross section of the first upper barrel head is in an arc shape or a pointed shape protruding upwards, the cross section of the second upper barrel head is in an arc shape or a pointed shape protruding downwards, the first upper barrel head and the second upper barrel head are respectively blocked at the top end opening and the bottom end opening of the upper barrel, the plurality of packing layers are sequentially arranged in the upper barrel from bottom to top at intervals along the vertical direction, an upper barrel gas outlet is arranged in the middle position of the top of the first upper barrel head, and an upper barrel gas inlet is arranged on the side wall of the bottom of the upper barrel.
8. The blast furnace gas desulfurization tower according to claim 7, wherein an upper drum gas inlet pipe extending in a horizontal direction is provided at the upper drum gas inlet, one end of the upper drum gas inlet pipe is located outside the upper drum, the other end of the upper drum gas inlet pipe extends into the upper drum, the cross section of the upper drum gas inlet pipe is an oblique opening which gradually inclines toward the inner wall of the upper drum from top to bottom, and the length of the upper drum gas inlet pipe extending into the upper drum is smaller than the radius of the upper drum.
9. The blast furnace gas desulfurization tower of claim 7, wherein a sewage discharge outlet is arranged at the middle position of the bottom of the second upper cylinder end enclosure, and an upper cylinder sewage discharge pipe is connected to the sewage discharge outlet.
10. The blast furnace gas desulfurization tower according to claim 7, wherein an upper shell charging port is provided in the side wall of the upper shell at a position corresponding to above the packing layer and in the top of the first upper shell head, respectively.
11. The blast furnace gas desulfurization tower according to claim 7, wherein an upper-barrel temperature and pressure measuring port is provided on the side wall of the upper barrel at a position corresponding to above the packing layer and on the top of the first upper-barrel head, and a temperature and pressure measuring device is provided at each of the upper-barrel temperature and pressure measuring ports.
12. The blast furnace gas desulfurization tower of claim 5, wherein the lower desulfurization section comprises a lower barrel, a partition plate and a lower barrel head, the lower barrel is a cylindrical structure with two open ends arranged along the vertical direction, the cross section of the lower barrel head is in an arc shape or a pointed shape protruding downwards, the partition plate and the lower barrel head are respectively plugged at the top end opening and the bottom end opening of the lower barrel, the plurality of packing layers are sequentially arranged in the lower barrel from bottom to top at intervals along the vertical direction, and the top side wall and the bottom side wall of the lower barrel are respectively provided with a lower barrel gas outlet and a lower barrel gas inlet.
13. The blast furnace gas desulfurization tower according to claim 12, wherein a lower drum inlet pipe extending in a horizontal direction is provided at the lower drum inlet, one end of the lower drum inlet pipe is located outside the lower drum, the other end of the lower drum inlet pipe extends into the lower drum, and has a cross section that is an oblique opening that gradually inclines toward the inner wall of the lower drum from top to bottom, and the length of the lower drum inlet pipe extending into the lower drum is smaller than the radius of the lower drum.
14. The blast furnace gas desulfurization tower of claim 12, wherein a sewage discharge outlet is arranged at the middle position of the bottom of the lower cylinder end enclosure, and a lower cylinder sewage discharge pipe is connected to the sewage discharge outlet.
15. The blast furnace gas desulfurization tower according to claim 12, wherein lower shell charging openings are provided in the side walls of the lower shells at positions corresponding to above the packing layers, respectively.
16. The blast furnace gas desulfurization tower according to claim 12, wherein lower-barrel temperature and pressure measurement ports are provided in the side wall of the lower barrel at positions corresponding to the positions above the packing layer, and a temperature and pressure measurement device is provided at each of the lower-barrel temperature and pressure measurement ports.
17. The blast furnace gas desulfurization tower of claim 1, wherein the tower body is made of carbon steel, a high-temperature-resistant anticorrosive layer is coated on the inner wall of the tower body, and an insulating layer is arranged on the outer wall of the tower body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122695052.3U CN215975686U (en) | 2021-11-05 | 2021-11-05 | Blast furnace gas desulfurizing tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122695052.3U CN215975686U (en) | 2021-11-05 | 2021-11-05 | Blast furnace gas desulfurizing tower |
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| CN215975686U true CN215975686U (en) | 2022-03-08 |
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