CN112410079A - 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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- CN112410079A CN112410079A CN202011325969.8A CN202011325969A CN112410079A CN 112410079 A CN112410079 A CN 112410079A CN 202011325969 A CN202011325969 A CN 202011325969A CN 112410079 A CN112410079 A CN 112410079A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/32—Purifying combustible gases containing carbon monoxide with selectively adsorptive solids, e.g. active carbon
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Abstract
The invention discloses a high-pressure high-resistance high-coal gas desulfurization system under large atmosphere and normal pressure, which comprises a dechlorination and deoxidation device, a hydrolysis device and an adsorption device, wherein the dechlorination and deoxidation device, the hydrolysis device and the adsorption device are all in 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, a deoxidizing agent, a hydrolysis agent and an adsorbent are respectively filled in the packing layer, 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):1, a blast furnace gas inlet, a hydrolysis gas inlet and an adsorption gas inlet are respectively arranged on one side wall of the upper air pressure buffer area of the device, and a dechlorination gas outlet, a hydrolysis gas outlet and an adsorption gas. The system of the invention reduces the thickness of the packing layer, and the pretreated gas adopts a mode of top-in bottom-out, thus effectively reducing the resistance drop of the packing layer and reducing the pressure requirement of the desulfurization system on blast furnace gas.
Description
Technical Field
The invention relates to the technical field of atmosphere purification and environment protection, in particular to a high-pressure furnace gas desulfurization system with large air volume, normal pressure and low resistance.
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 200mgS/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. Therefore, source desulfurization of blast furnace gas becomes an ideal method for treating sulfur species, compared to terminal desulfurization techniques.
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.
Disclosure of Invention
The invention aims to solve the problems of large pressure requirement and high treatment cost of the existing desulfurization system on the treated blast furnace gas, thereby providing a high-pressure high-resistance blast furnace gas desulfurization system with large atmospheric pressure.
The invention 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 up to 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 standby or used for regenerating an adsorbent; each adsorption device is vertically overlapped and arranged below the hydrolysis device.
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 technical scheme of the invention has the following advantages:
A. according to the high-pressure coal gas desulfurization system with the large air volume, the normal pressure and the low resistance, each processing device comprises the air pressure buffer area above the packing layer, the packing layer and the air pressure buffer area below the packing layer, the thickness of the packing layer is reduced, the pretreatment gas adopts an up-in-down-out mode, the resistance drop of the packing layer can be effectively reduced, the pressure requirement of the desulfurization system on the blast furnace gas is reduced, the lowest limit of the processing pressure of the blast furnace gas in the system is 5KPa, the resistance drop of each group of processing devices is less than 500Pa, and the effective processing amount of the blast furnace gas is improved.
B. The dechlorination deoxidation device, the hydrolysis device and the adsorption device are vertically arranged, so that the floor area of the system is greatly reduced, and land resources are saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings which are needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained from the drawings without inventive labor to those skilled in the art.
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 according to the present invention;
FIG. 2 is a schematic view of the structure of the packing layer in the present invention;
FIG. 3 is a schematic view of the structure of the 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 solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figure 1, the invention provides a high-pressure high-resistance blast furnace gas desulfurization system with large air volume, normal pressure and low resistance, which comprises a dechlorination and deoxidation device 1, a hydrolysis device 2 and an adsorption device 3, wherein the dechlorination and deoxidation device 1 is provided with a blast furnace gas inlet 11 and a deoxidation and dechlorination gas outlet 12, the hydrolysis device 2 is provided with a hydrolysis gas inlet 21 and a hydrolysis gas outlet 22, the adsorption device 3 is provided with an adsorption gas inlet 31 and an adsorption gas outlet 32, the deoxidation and dechlorination gas outlet 12 is communicated with the hydrolysis gas inlet 21, and the hydrolysis gas outlet 22 is communicated with. 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. 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. each processing device comprises an upper air pressure buffer area of the packing layer, the packing layer and a lower air pressure buffer area of the packing layer, the thickness of the packing layer is reduced, the pretreated gas adopts a mode of going up and down, the resistance drop of the packing layer can be effectively reduced, the pressure requirement of a desulfurization system on blast furnace gas is reduced, the effective treatment capacity of the blast furnace gas is improved, the minimum limit of the treatment pressure of the blast furnace gas in the system is 5KPa, and the resistance drop of each group of processing devices 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 which can be selected from noble goldBelongs to at least one of deoxidizing agent and non-noble metal cobalt molybdenum sulfur type deoxidizing agent; 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 also comprises a heat exchange device 4, wherein the heat exchange device 4 is provided with a heat exchange gas inlet 41 and a heat exchange gas outlet 42, the heat exchange gas inlet 41 is respectively communicated with the adsorption gas inlets 31 of the 4 adsorption devices 3, the adsorption gas outlets 32 of the 4 adsorption devices 3 are converged and then divided into two paths, one path is used for recovering purified blast furnace gas, the other path is communicated with the heat exchange gas inlet 41 through a regeneration gas inlet pipeline 6 through a gas pump 5, part of the purified blast furnace gas enters the adsorption devices 3 after being heated through the heat exchange device 4, and when the adsorbent in the adsorption devices 3 adsorbs hydrogen sulfide to be saturated, the adsorbent in the adsorption devices 3 can be regenerated. 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 and sulfur-free blast furnace gas to 190 ℃ through a heat exchanger, and regenerating the adsorbent. 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。
Nothing in this specification is said to apply to the 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 intended to be within the scope of the invention.
Claims (9)
1. A high-furnace gas desulfurization system with large air volume, normal pressure and low resistance comprises a dechlorination and deoxidation device (1), a hydrolysis device (2) and an adsorption device (3), wherein the dechlorination and deoxidation device (1) is provided with a blast furnace gas air inlet (11) and a deoxidation and dechlorination air outlet (12), the hydrolysis device (2) is provided with a hydrolysis air inlet (21) and a hydrolysis air outlet (22), the adsorption device (3) is provided with an adsorption air inlet (31) and an adsorption air outlet (32), the deoxidation and dechlorination air outlet (12) is communicated with the hydrolysis air inlet (21), and the hydrolysis air outlet (22) is communicated with the adsorption air inlet (31); the method is characterized in that: the interior of the dechlorination and deoxidation device (1), the hydrolysis device (2) and the adsorption device (3) is 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 inlet (11), the hydrolysis gas inlet (21) and the adsorption gas inlet (31) are respectively arranged on the side wall of one side of the upper air pressure buffer area (a) of the device where the blast furnace gas inlet is arranged, and the deoxidation and dechlorination gas outlet (12), the hydrolysis gas outlet (22) and the adsorption gas outlet (32) are respectively arranged on the side wall of the other side of the lower air pressure buffer area (c) of the device where the.
2. The large atmospheric-pressure low-resistivity high furnace gas desulfurization system according to claim 1, wherein the internal volume ratio of the upper gas pressure buffer zone (a), the packing layer (b) and the lower gas pressure buffer zone (c) is 1 (0.8-2): 1.
3. The large atmospheric-pressure low-resistance high-furnace gas desulfurization system according to claim 2, characterized in that the packing layer (b) in the dechlorination and deoxidation apparatus (1) has a packing height-to-diameter ratio of 1: 10-1: 30.
4. the system for desulfurizing high furnace gas at high atmospheric pressure and low resistance according to claim 3, wherein the upper end and the lower end of the packing layer (b) are respectively provided with a grid (d), and the packing in the packing layer (b) is fixed between the upper gas pressure buffer area (a) and the lower gas pressure buffer area (c) through the two grids (d).
5. The large-atmosphere atmospheric-pressure low-resistance high-blast furnace gas desulfurization system according to claim 4, characterized in that the dechlorination and deoxidation apparatus (1) is arranged above the hydrolysis apparatus (2), the adsorption apparatus (3) is arranged below the hydrolysis apparatus (2), and heat insulating layers (e) are arranged between the dechlorination and deoxidation apparatus (1) and the hydrolysis apparatus (2) and between the hydrolysis apparatus (2) and the adsorption apparatus (3).
6. The high-blast atmospheric-pressure low-resistance blast furnace gas desulfurization system according to claim 5, characterized in that the packing layer (b) in the dechlorination and deoxidation apparatus (1) is used for filling a deoxidizer; the filler layer (b) in the hydrolysis device (2) is used for filling a hydrolysis agent; the filler layer (b) of the adsorption device (3) is used for filling an adsorbent.
7. The large-atmosphere atmospheric-pressure low-resistance high-blast furnace gas desulfurization system according to any one of claims 5 to 6, characterized in that the system comprises at least two adsorption devices (3) arranged in parallel, each adsorption device (3) is vertically stacked below the hydrolysis device (2), and the heat insulation layer (e) is arranged between two adjacent adsorption devices (3).
8. The large atmospheric-pressure low-resistivity high-furnace gas desulfurization system according to claim 7, characterized in that the system comprises up to 4 of the adsorption apparatuses (3) arranged in parallel, wherein 3 of the adsorption apparatuses (3) arranged in parallel are used for adsorption treatment of the blast furnace gas, and the other is in standby or regenerating the adsorbent; each adsorption device (3) is vertically overlapped and arranged below the hydrolysis device (2).
9. The large atmospheric-pressure low-resistivity high-furnace-gas desulfurization system according to claim 8, the system also comprises a heat exchange device (4), a heat exchange air inlet (41) and a heat exchange air outlet (42) are arranged on the heat exchange device (4), the heat exchange gas inlet (41) is respectively communicated with the adsorption gas inlets (31) of the 4 adsorption devices (3), the adsorption gas outlets (32) of the 4 adsorption devices (3) are converged and then divided into two paths, one path is used for recovering purified blast furnace gas, the other path is communicated with the heat exchange gas inlet (41) through a regeneration gas inlet pipeline (6) through a gas pump (5), and part of purified blast furnace gas is heated by the heat exchange device (4) and then enters the adsorption devices (3) for regeneration of an adsorbent saturated in the adsorption devices (3).
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| CN202011325969.8A CN112410079A (en) | 2020-11-23 | 2020-11-23 | High-pressure high-furnace gas desulfurization system with large air volume, normal pressure and low resistance |
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| CN202011325969.8A CN112410079A (en) | 2020-11-23 | 2020-11-23 | High-pressure high-furnace gas desulfurization system with large air volume, normal pressure and low resistance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113583721A (en) * | 2021-07-21 | 2021-11-02 | 福州大学 | Oxygen-free high-water-content high-furnace gas desulfurization system and process |
| CN113577978A (en) * | 2021-07-21 | 2021-11-02 | 福州大学 | Blast furnace gas desulfurization system and process with circularly used adsorbent |
-
2020
- 2020-11-23 CN CN202011325969.8A patent/CN112410079A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113583721A (en) * | 2021-07-21 | 2021-11-02 | 福州大学 | Oxygen-free high-water-content high-furnace gas desulfurization system and process |
| CN113577978A (en) * | 2021-07-21 | 2021-11-02 | 福州大学 | Blast furnace gas desulfurization system and process with circularly used adsorbent |
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