CN213866089U - High-pressure high-furnace gas desulfurization system with large air volume, normal pressure and low resistance - Google Patents
High-pressure high-furnace gas desulfurization system with large air volume, normal pressure and low resistance Download PDFInfo
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- CN213866089U CN213866089U CN202022734450.7U CN202022734450U CN213866089U CN 213866089 U CN213866089 U CN 213866089U CN 202022734450 U CN202022734450 U CN 202022734450U CN 213866089 U CN213866089 U CN 213866089U
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- adsorption
- hydrolysis
- blast furnace
- furnace gas
- dechlorination
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 38
- 230000023556 desulfurization Effects 0.000 title claims abstract description 38
- 238000001179 sorption measurement Methods 0.000 claims abstract description 104
- 230000007062 hydrolysis Effects 0.000 claims abstract description 68
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 68
- 238000006298 dechlorination reaction Methods 0.000 claims abstract description 45
- 239000000872 buffer Substances 0.000 claims abstract description 38
- 238000012856 packing Methods 0.000 claims abstract description 36
- 239000003463 adsorbent Substances 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 238000006392 deoxygenation reaction Methods 0.000 claims abstract 6
- 238000011049 filling Methods 0.000 claims description 14
- 238000011069 regeneration method Methods 0.000 claims description 8
- 230000008929 regeneration Effects 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 106
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 16
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 10
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 10
- 239000000945 filler Substances 0.000 description 9
- 238000012546 transfer Methods 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 6
- 229910000510 noble metal Inorganic materials 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 230000001172 regenerating effect Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 3
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- INILCLIQNYSABH-UHFFFAOYSA-N cobalt;sulfanylidenemolybdenum Chemical compound [Mo].[Co]=S INILCLIQNYSABH-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- IRXRGVFLQOSHOH-UHFFFAOYSA-L dipotassium;oxalate Chemical compound [K+].[K+].[O-]C(=O)C([O-])=O IRXRGVFLQOSHOH-UHFFFAOYSA-L 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 125000001741 organic sulfur group Chemical group 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 description 1
- 229940039790 sodium oxalate Drugs 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
本实用新型公开了一种大气量常压低阻力高炉煤气脱硫系统，包括脱氯脱氧装置、水解装置和吸附装置，三者内部均为3层结构，自上而下依次设有上方气压缓冲区、填料层和下方气压缓冲区，填料层内分别填充脱氧剂、水解剂和吸附剂，上方气压缓冲区、填料层和下方气压缓冲区内体积比为1:(0.8‑2):1，高炉煤气进气口、水解进气口和吸附进气口分别设置在其所在装置上方气压缓冲区的一侧侧壁上，脱氧脱氯出气口、水解出气口和吸附出气口分别设置在其所在装置下方气压缓冲区的另一侧侧壁上。本实用新型系统降低了填料层的厚度，且预处理气体均采用上进下出的方式，能够有效地降低填料层的阻力降，降低了脱硫系统对高炉煤气的压力需要。
The utility model discloses a blast furnace gas desulfurization system with atmospheric volume, atmospheric pressure and low resistance, which comprises a dechlorination and deoxidation device, a hydrolysis device and an adsorption device. The interiors of the three are all three-layer structures, and an upper air pressure buffer zone is arranged in sequence from top to bottom. , packing layer and lower pressure buffer zone, the packing layer is filled with deoxidizer, hydrolyzing agent and adsorbent respectively, the volume ratio of the upper pressure buffer zone, packing layer and lower pressure buffer zone is 1:(0.8‑2):1, blast furnace The gas inlet, the hydrolysis inlet and the adsorption inlet are respectively arranged on one side wall of the pressure buffer zone above the device where they are located, and the deoxygenation and dechlorination outlet, the hydrolysis outlet and the adsorption outlet are respectively arranged on the device where they are located. On the other side wall of the lower air pressure buffer. The system of the utility model reduces the thickness of the packing layer, and the pretreatment gas adopts the method of top-in and bottom-out, which can effectively reduce the resistance drop of the packing layer and reduce the pressure requirement of the desulfurization system on the blast furnace gas.
Description
Technical Field
The utility model relates to an atmosphere purifies environmental protection technical field, concretely relates to big atmospheric pressure low resistance high furnace gas desulfurization system.
Background
Blast furnace gas has considerable combustion value, with a carbon monoxide content of about 28% by volume, a hydrogen content of about 1% by volume and a methane content of about 0.5% by volume. Blast furnace gas is usually sent to a hot blast stove, a heating furnace, a coke oven, a boiler and a gas turbine set in a fuel mode for combustion. However, in addition to the above-mentioned gases, the blast furnace gas contains COS (carbonyl sulfide) and CS2、H2S, wherein the main component of the sulfide is COS, and the total sulfur concentration generally reaches 200 mgS/Nm3The above. These sulfides may be SO, if not limited2Is discharged into the air, thereby causing a large amount of acid rain to form. With the increasing awareness of environmental protection, the emission limit of sulfur is becoming more and more strict, and each terminal using blast furnace gas builds up a huge flue gas desulfurization device. The dispersed desulfurization device not only greatly wastes the limited steel mill space, but also increasingly highlights the cost and secondary pollution of flue gas desulfurization. Thus, it is in the same state as terminal desulfurization techniqueIn contrast, source desulfurization of blast furnace gas is an ideal method for treating sulfur species.
The prior art CN110218590A discloses a blast furnace gas desulfurization method and a system, wherein the blast furnace gas desulfurization method comprises the following steps: 1) introducing the compressed feed gas into a hydrolysis tower for COS hydrolysis to generate a mixed gas containing hydrogen sulfide; 2) introducing the mixed gas containing hydrogen sulfide into a pressure swing adsorption carbon dioxide purification device for coarse desulfurization to obtain coarse desulfurization gas, and performing adsorbent desorption on the adsorbent adsorbing carbon dioxide and hydrogen sulfide; 3) introducing the crude desulfurization gas into a fine desulfurization tower for fine desulfurization to obtain fine desulfurization gas; 4) and introducing the fine desulfurization gas into a pressure swing adsorption carbon monoxide purification working section, and purifying the carbon monoxide to obtain the desulfurized blast furnace gas. However, the gas amount of blast furnace gas is enormous, and a 1000-cube blast furnace can generate more than 10 million standard cubes of blast furnace gas per hour, the pressure thereof is generally more than 100KPa, and the pressure is reduced to 5 to 20KPa after the pressure energy recovered by a residual pressure turbine power generation unit (TRT). However, transforming the pressure for such a large amount of gas will consume a large amount of energy. However, if the normal pressure adsorption is performed, the resistance drop problem of the desulfurization system adopting the traditional adsorbent filling mode can cause that the dosage of the adsorbent cannot be too high, and the dosage of the adsorbent is too low, which can cause the problems of frequent replacement of the adsorbent and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the existing desulphurization system has large pressure demand and high treatment cost for the treated blast furnace gas, thereby providing a high-pressure high-furnace gas desulphurization system with large atmospheric pressure and low resistance.
The utility model adopts the following technical scheme:
a high-pressure high-furnace gas desulfurization system with high atmospheric pressure and low resistance comprises a dechlorination and deoxidation device, a hydrolysis device and an adsorption device, wherein the dechlorination and deoxidation device is provided with a blast furnace gas inlet and a dechlorination gas outlet, the hydrolysis device is provided with a hydrolysis gas inlet and a hydrolysis gas outlet, the adsorption device is provided with an adsorption gas inlet and an adsorption gas outlet, the dechlorination and desorption gas outlet is communicated with the hydrolysis gas inlet, and the hydrolysis gas outlet is communicated with the adsorption gas inlet; the interior of the dechlorination deoxidation device, the hydrolysis device and the adsorption device is of a 3-layer structure, an upper air pressure buffer area, a packing layer and a lower air pressure buffer area are sequentially arranged from top to bottom, the blast furnace gas inlet, the hydrolysis inlet and the adsorption inlet are respectively arranged on one side wall of the upper air pressure buffer area of the device, and the deoxidation dechlorination air outlet, the hydrolysis air outlet and the adsorption air outlet are respectively arranged on the other side wall of the lower air pressure buffer area of the device.
The volume ratio of the upper air pressure buffer area to the packing layer to the lower air pressure buffer area is 1 (0.8-2) to 1.
Preferably, the volume ratio of the upper air pressure buffer area, the filler layer and the lower air pressure buffer area is 1:1.5: 1.
The filling height-diameter ratio of a filling layer in the dechlorination deoxidation device is 1: 10-1: 30.
the upper end and the lower end of the packing layer are respectively provided with a grid, and the packing in the packing layer is fixed between the upper air pressure buffer area and the lower air pressure buffer area through the two grids.
The dechlorination deoxidation device is arranged above the hydrolysis device, the adsorption device is arranged below the hydrolysis device, and heat insulation layers are arranged between the dechlorination deoxidation device and the hydrolysis device and between the hydrolysis device and the adsorption device.
The filler layer in the dechlorination and deoxidation device is used for filling a deoxidizer; the filler layer in the hydrolysis device is used for filling a hydrolysis agent; the filler layer of the adsorption device is used for filling an adsorbent.
The system comprises at least two adsorption devices which are arranged in parallel, wherein each adsorption device is vertically overlapped and arranged below the hydrolysis device, and the heat insulation layer is arranged between every two adjacent adsorption devices.
Preferably, the system comprises at least 4 adsorption devices arranged in parallel, wherein 3 adsorption devices arranged in parallel are used for carrying out adsorption treatment on blast furnace gas, and the other adsorption device is used for standby or regenerating adsorbent.
The system also comprises a heat exchange device, wherein the heat exchange device is provided with a heat exchange air inlet and a heat exchange air outlet, the heat exchange air inlet is respectively communicated with the adsorption air inlets of the 4 adsorption devices, the adsorption air outlets of the 4 adsorption devices are converged and then divided into two paths, one path is used for recovering the purified blast furnace gas, the other path is communicated with the heat exchange air inlet through a regeneration air inlet pipeline through an air pump, and part of the purified blast furnace gas enters the adsorption devices after being heated by the heat exchange device and is used for regenerating the adsorbent which is adsorbed and saturated in the adsorption devices.
The utility model discloses technical scheme has following advantage:
A. the utility model discloses big tolerance ordinary pressure low resistance high furnace gas desulfurization system, each processing apparatus all includes the top atmospheric pressure buffer zone of packing layer, the below atmospheric pressure buffer zone of packing layer and packing layer, the thickness of packing layer has been reduced, and the gaseous mode of going into down out in all adopting of preliminary treatment, the resistance that can reduce the packing layer effectively falls, the pressure needs of desulfurization system to blast furnace gas have been reduced, the treatment pressure of blast furnace gas is 5KPa at the lowest limit in this system, each resistance of organizing processing apparatus falls and is less than 500Pa, the effective treatment capacity of blast furnace gas has been improved.
B. The utility model discloses vertical setting about well dechlorination deoxidation device, hydrolysis unit and adsorption equipment adopt has reduced the area of system greatly, practices thrift land used resource.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed 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 to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of a large-capacity normal-pressure low-resistance high-pressure blast furnace gas desulfurization system of the present invention;
FIG. 2 is a schematic view of the structure of the filler layer in the present invention;
fig. 3 is a schematic diagram of the structure of the middle grid of the present invention.
The labels in the figure are as follows:
1-dechlorination and deoxidation device, 11-blast furnace gas inlet, 12-deoxidation and dechlorination gas outlet; 2-a hydrolysis device, 21-a hydrolysis air inlet and 22-a hydrolysis air outlet; 3-adsorption device, 31-adsorption air inlet, 32-adsorption air outlet; 4-heat exchange device, 41-heat exchange air inlet, 42-heat exchange air outlet; 5, an air pump; 6-regeneration air inlet pipeline; 7-adsorbing and regenerating an air outlet pipeline;
a-an upper air pressure buffer zone; b-a filler layer; c-a lower air pressure buffer zone; d-a grid; e-a thermal insulation layer; f-a filling opening.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the utility model provides a big atmospheric pressure low resistance blast furnace gas desulfurization system, including dechlorination deoxidation device 1, hydrolysis unit 2 and adsorption equipment 3, be equipped with blast furnace gas air inlet 11 and deoxidation dechlorination gas outlet 12 on the dechlorination deoxidation device 1, be equipped with the air inlet 21 of hydrolysising and hydrolyze the gas outlet 22 on the hydrolysis unit 2, be equipped with on the adsorption equipment 3 and adsorb air inlet 31 and adsorb gas outlet 32, deoxidation dechlorination gas outlet 12 and the air inlet 21 intercommunication of hydrolysising, the gas outlet 22 of hydrolysising with adsorb air inlet 31 intercommunication. The dechlorination deoxidation device 1, the hydrolysis device 2 and the adsorption device 3 are all of a 3-layer structure, an upper air pressure buffer area a, a packing layer b and a lower air pressure buffer area c are sequentially arranged from top to bottom, the blast furnace gas air inlet 11, the hydrolysis air inlet 21 and the adsorption air inlet 31 are respectively arranged on one side wall of the upper air pressure buffer area a of the device where the blast furnace gas air inlet is arranged, and the dechlorination air outlet 12, the hydrolysis air outlet 22 and the adsorption air outlet 32 are respectively arranged on the other side wall of the lower air pressure buffer area c of the device where the blast furnace gas air inlet is arranged. The volume ratio of the upper air pressure buffer area a to the packing layer b to the lower air pressure buffer area c is 1 (0.8-2) to 1, and the packing height ratio of the packing layer b in the dechlorination deoxidation device 1 is 1: 10-1: 30. the utility model discloses in the below atmospheric pressure buffer of each processing apparatus all including the top atmospheric pressure buffer of packing layer, packing layer and packing layer, the thickness of packing layer has been reduced, and the gaseous mode of going into down on all adopting of preliminary treatment, can reduce the resistance of packing layer effectively and fall, reduced desulfurization system and to the pressure needs of blast furnace gas, the effective handling capacity of blast furnace gas has been improved, the treatment pressure of blast furnace gas is 5KPa at the lowest limit in this system, each resistance of organizing processing apparatus falls and is less than 500 Pa.
Further, as shown in fig. 2 and 3, the upper end and the lower end of the packing layer b are respectively provided with a grating d, and the packing in the packing layer b is fixed between the upper air pressure buffer area a and the lower air pressure buffer area c through the two gratings d. The grid d adopts an annular spider-web structure, and the gas passing performance is good.
The control temperature of the dechlorination deoxidation device 1 is 80-150 ℃, the dechlorination deoxidation device 1 is arranged above the hydrolysis device 2, and the filling height-diameter ratio of the filler layer b in the dechlorination deoxidation device 1 is 1: 10-1: 30, the adsorption device 3 is arranged below the hydrolysis device 2, and heat insulation layers e are respectively arranged between the dechlorination and deoxidation device 1 and the hydrolysis device 2 and between the hydrolysis device 2 and the adsorption device 3. The filler layer b in the dechlorination and deoxidation device 1 is used for filling a deoxidizer, and the deoxidizer can be at least one of a noble metal deoxidizer and a non-noble metal cobalt molybdenum sulfur deoxidizer; the noble metal deoxidizer is preferably a supported noble metal deoxidizer, the active component in the supported noble metal deoxidizer is selected from one or more of gold, platinum, palladium and ruthenium, and the carrier is an oxide carrier or a ceramic carrier, wherein the oxide carrier is selected from one or more of alumina, silica, magnesia, titania, zirconia and ceria; the active component in the non-noble metal cobalt molybdenum sulfur type deoxidizer is selected from CoMo2S、 CoMo3S、CoMo4One or more of S; the carrier is alumina. The packing layer b in the hydrolysis device 2 is used for filling a hydrolysis agent, the hydrolysis agent is a supported hydrolysis agent, the active component of the supported hydrolysis agent is selected from one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium oxalate, potassium oxalate, sodium sulfate and potassium sulfate, and the carrier is selected from one or more of carbon nitride, alumina, silica, magnesia, titania, zirconia and ceria. The filler layer b of the adsorption device 3 is used for filling the adsorbent. The adsorbent is a supported adsorbent, the active component of the supported adsorbent is selected from one or more of ferric oxide, cobalt oxide, nickel oxide and copper oxide, and the carrier is selected from one or more of modified bauxite, carbon nitride, alumina, silica, magnesia, titania, zirconia and ceria.
The desulfurization system comprises at least two adsorption devices 3 which are arranged in parallel, preferably 4 adsorption devices, wherein the 3 adsorption devices 3 which are arranged in parallel are used for carrying out adsorption treatment on blast furnace gas, and the other adsorption device is used for standby or regenerating an adsorbent; every adsorption equipment 3 is vertical to be overlapped and is set up in the below of hydrolysis unit 2, sets up insulating layer e between two adjacent adsorption equipment 3.
When the device is used, the blast furnace gas to be processed enters the dechlorination and deoxidation device 1 through the blast furnace gas inlet 11 to be processed, so that raw gas after dechlorination and deoxidation is obtained, the raw gas after dechlorination and deoxidation is discharged from the dechlorination and deoxidation gas outlet 12, enters the hydrolysis device 2 through the hydrolysis gas inlet 21 of the hydrolysis device 2 and is hydrolyzed in the hydrolysis device 2, organic sulfur COS in the blast furnace gas is converted into hydrogen sulfide, so that raw gas after hydrolysis is obtained, the raw gas after hydrolysis enters the adsorption device 3 through the adsorption gas inlet 31 of the adsorption device 3, and the hydrogen sulfide is adsorbed in the adsorption device 3, so that the raw gas after hydrolysis is desulfurized, and the desulfurized blast furnace gas is obtained.
The system still includes heat transfer device 4, be equipped with heat transfer air inlet 41 and heat transfer gas outlet 42 on heat transfer device 4, heat transfer air inlet 41 respectively with 4 adsorption equipment 3's absorption air inlet 31 UNICOM, 4 adsorption equipment 3's absorption gas outlet 32 joins the back and divides two the tunnel, be used for the blast furnace gas after purifying to retrieve all the way, another way is through regeneration air inlet pipeline 6 through an air pump 5 and heat transfer air inlet 41 intercommunication, get into in adsorption equipment 3 after the heating of partial blast furnace gas after purifying passes through heat transfer device 4, when absorbent absorption hydrogen sulfide reaches the saturation in adsorption equipment 3, can regenerate the absorbent in the adsorption equipment 3. For example, part of desulfurized clean blast furnace gas is conveyed by the air pump 5, and is made to enter the heat exchange device 4 from the heat exchange gas inlet 41 of the heat exchange device 4 so as to heat and raise the temperature of the clean blast furnace gas to 180-. The blast furnace gas containing the elemental sulfur is collected to the adsorption regeneration gas outlet pipeline 7 from the adsorption gas outlet 32 of the adsorption device 3 and is discharged. Optionally, when 4 adsorption devices 3 are arranged in parallel, the hydrolyzed raw gas first passes through one of the adsorption devices 3, and when the adsorbent in the adsorption device 3 adsorbs hydrogen sulfide to saturation, the hydrolyzed raw gas is controlled by a valve to pass through only the remaining 3 adsorption devices 3, so as to obtain desulfurized clean blast furnace gas. Conveying part of desulfurized clean blast furnace gas by an air pump 5, enabling the clean blast furnace gas to enter a heat exchange device 4 from a heat exchange gas inlet 41 of the heat exchange device 4 so as to heat and raise the temperature of the clean blast furnace gas, discharging the heated and raised clean blast furnace gas from a heat exchange gas outlet 42 of the heat exchange device 4, enabling the clean blast furnace gas to enter a corresponding adsorption device 3 from an adsorption gas inlet 31 of the adsorption saturation adsorption device 3, regenerating an adsorbent by utilizing reducing atmosphere (such as hydrogen, carbon monoxide and the like) in the blast furnace gas, and simultaneously oxidizing hydrogen sulfide into elemental sulfur by oxygen in the blast furnace gas, and then discharging the elemental sulfur from an adsorption gas outlet 32 of the adsorption device 3. When the hydrogen sulfide adsorbed by the adsorbents in the other 3 adsorption devices 3 reaches saturation, the adsorbents in the adsorption devices can be regenerated, and meanwhile, the other adsorption device 3 is started to continue to perform desulfurization adsorption treatment on the blast furnace gas, so that the continuous operation of the blast furnace gas desulfurization process can be realized by alternative use.
Application example:
120000Nm3The COS concentration at 90 deg.C of 7KPa is 80mg/m3The blast furnace gas enters from a blast furnace gas inlet 11 of the deoxidation and dechlorination device 1, and after passing through the deoxidation and dechlorination device 1 which is provided with a load type ruthenium metal catalyst with the height-diameter ratio of 0.1, the pressure drop is about 200Pa, the oxygen content is lower than 0.005 percent, and the chlorine content is lower than 2mg/m3(ii) a The blast furnace gas after the deoxidation and the dechlorination enters a hydrolysis device 2 and is filled with 7 percent Na of COS hydrolysis catalyst with the height-diameter ratio of 0.12CO3/Al2O3Then the COS concentration in the deoxidized dechlorination after hydrolysis is lower than 1mg/m3The pressure drop is about 200Pa, and the material flow enters into a device containing Fe with the height-diameter ratio of 0.12O3/Al2O3-C3N4An adsorbent adsorption device 3 for adsorbing H in the blast furnace gas desulfurized by the adsorption device2The concentration of S is less than 1mg/m3The pressure drop is about 200 Pa. Heating a small part of clean oxygen-free sulfur-free blast furnace gas to 190 ℃ by a heat exchanger, and heatingThe adsorbent is regenerated. After regeneration is completed, when the temperature is reduced to be lower than 80 ℃, the valve is switched to be alternately used with the other three adsorption devices 3.
After the adsorption and regeneration cycle test is carried out for 10 times in the steps, H in the blast furnace gas2The concentration of S is less than 2mg/m3。
The utility model discloses the nothing is mentioned the part and is applicable to prior art.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
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| CN112410079A (en) * | 2020-11-23 | 2021-02-26 | 福州大学化肥催化剂国家工程研究中心 | High-pressure high-furnace gas desulfurization system with large air volume, normal pressure and low resistance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112410079A (en) * | 2020-11-23 | 2021-02-26 | 福州大学化肥催化剂国家工程研究中心 | High-pressure high-furnace gas desulfurization system with large air volume, normal pressure and low resistance |
| CN112410079B (en) * | 2020-11-23 | 2025-04-25 | 中琉科技有限公司 | A large volume, normal pressure, low resistance blast furnace gas desulfurization system |
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