CN113817513A - Device and method for hydrolyzing and converting organic sulfur in blast furnace gas - Google Patents
Device and method for hydrolyzing and converting organic sulfur in blast furnace gas Download PDFInfo
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- CN113817513A CN113817513A CN202111128657.2A CN202111128657A CN113817513A CN 113817513 A CN113817513 A CN 113817513A CN 202111128657 A CN202111128657 A CN 202111128657A CN 113817513 A CN113817513 A CN 113817513A
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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
- C10K1/34—Purifying combustible gases containing carbon monoxide by catalytic conversion of impurities to more readily removable materials
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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
- C10K1/02—Dust removal
- C10K1/024—Dust removal by filtration
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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
- C10K1/02—Dust removal
- C10K1/028—Dust removal by electrostatic precipitation
Abstract
The invention provides a device and a method for hydrolyzing and converting organic sulfur in blast furnace gas, wherein the device comprises an air inlet area, a transition area, a catalyst area and an air outlet area, wherein the air inlet area is positioned at the upper part of the device, and the air inlet area, the transition area, the catalyst area and the air outlet area are all positioned below the air inlet area and are arranged in a surrounding way from outside to inside; the lower part of the gas inlet area is provided with a baffling arc plate which separates the gas inlet area from the catalyst area and the gas outlet area, and the gas inlet area is communicated with the transition area; the transition region, the catalyst region and the gas outlet region are sequentially separated by a V-shaped grating, the V-shaped grating is formed by a plurality of triangular prisms surrounding arc ribs, and the adjacent triangular prisms are arranged at intervals. According to the invention, through the region division in the device, especially the structural design of the V-shaped grating, catalyst particles or dust is easy to take away, the blockage of a contact interface is avoided, the pressure drop loss is reduced, and the catalyst utilization rate is improved; the V-shaped grating has high strength and extrusion resistance, can improve the space occupation ratio of the catalyst area, thereby improving the treatment efficiency of coal gas, and has stable operation, strong adaptability and good economic benefit.
Description
Technical Field
The invention belongs to the technical field of gas purification, and relates to a device and a method for hydrolyzing and converting organic sulfur in blast furnace gas.
Background
The blast furnace gas is the combustible gas with the largest output in the steel industry, has wide application, and can be used as the fuel of thermal equipment such as a power plant boiler, a hot blast stove of an iron-making plant, a heating furnace of a steel mill and the like after dust removal and residual pressure turbine power generation. The sulfur content of blast furnace gas is high, and the blast furnace gas mainly contains carbonyl sulfide (COS) and hydrogen sulfide components, and SO is contained in flue gas discharged after the blast furnace gas is used as fuel2The content of (A) exceeds the standard and can not meet the requirement of SO in the flue gas2Ultra low emission requirements. In the current technical route, a tail end treatment mode needs to be provided with desulfurization facilities at multiple points, the waste gas treatment capacity is large, and the treatment difficulty and pressure are high, so that the mode of source control is more inclined to be adopted to carry out desulfurization on blast furnace gas at present.
The sulfur content of the coal gas is different due to different blast furnace raw materials, the sulfur in the blast furnace coal gas exists mainly in carbonyl sulfide, and the balance is mainly H2S, and the difficulty of desulfurization is the removal of organic sulfur, such as H2S is directly removed by adopting an adsorption method or an alkali washing method, and needs to be converted into H through hydrolytic conversion2S, removing; the organic sulfur conversion device is usually arranged before the residual pressure turbine power generation device, so the pressure drop of the conversion device greatly influences the power generation efficiency of the subsequent residual pressure turbine.
CN 111592917a discloses a blast furnace gas fine desulfurization method and a fine desulfurization system, the fine desulfurization method includes: the blast furnace gas enters an organic sulfur conversion device after being sequentially subjected to gravity dust removal and cloth bag dust removal, and organic sulfur in the blast furnace gas is hydrolyzed and converted into H2S; the blast furnace gas is discharged from the organic sulfur conversion device and then enters a waste pressure power generation device, and the pressure energy of the blast furnace gas is utilized to do work and generate power; introducing blast furnace gas after residual pressure power generation into a desulfurization device, and carrying out fine desulfurization by countercurrent contact with mixed desulfurization liquid formed by a desulfurizer and alkali liquor; the method introduces the whole process of blast furnace gas desulfurization, and emphasizes that the desulfurization process is disclosed, and although a desulfurization system is also disclosed, the desulfurization process and the desulfurization system are all carried outOnly the name of the device is introduced, the specific structure of the device, especially the structure of the organic sulfur conversion device, is not explicitly described, and how to improve the hydrolysis conversion efficiency from the structure of the device is not disclosed.
CN 112812853A discloses a gas impurity-removing hydrolysis composite tank and a blast furnace gas fine desulfurization system, which comprises a reaction tank body, wherein the reaction tank body is provided with a gas inlet and a gas outlet along the radial direction, at least 3 net clapboards are arranged inside the reaction tank body, the net clapboards are parallel to the central line of the reaction tank or form an acute angle with the central line of the reaction tank, gas flows along the radial direction of the tank body, the net clapboards divide the inside of the reaction tank body into a gas distribution chamber, an impurity-removing chamber, a catalytic hydrolysis chamber and a gas collection chamber in sequence, an impurity-removing agent is placed in the impurity-removing chamber, and an organic catalytic conversion agent is placed in the catalytic hydrolysis chamber; this retort body is inside to adopt the net baffle to separate, but each structure room parallel arrangement, area of contact is less, and gaseous pressure drop is great, and the net baffle is difficult to adjust, causes the interface blockage easily, has further improved the pressure drop loss.
In summary, for the hydrolysis conversion of organic sulfur in blast furnace gas, the structure of the hydrolysis conversion device needs to be improved, especially for the improvement of the gas-solid mass transfer component, so as to increase the gas-solid contact area, avoid the blockage of the contact interface, reduce the pressure loss, and simultaneously increase the utilization rate of the catalyst and the hydrolysis conversion efficiency of the gas, thereby increasing the economic benefit.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a device and a method for hydrolyzing and converting organic sulfur in blast furnace gas, wherein the device enables damaged catalyst particles or dust to be easily taken away by gas through the division of each region in the device, especially the structural design of a catalyst region and a separation component of two side regions, so that the blockage of a contact interface is avoided, the pressure drop loss of the blast furnace gas is reduced, and the utilization rate of the catalyst is improved; the V-shaped grating has high strength, extrusion resistance and small volume, thereby improving the space occupation ratio of the catalyst area, improving the hydrolysis conversion efficiency of blast furnace gas, ensuring the smooth operation of the subsequent desulfurization process and avoiding secondary pollution.
In order to achieve the purpose, the invention adopts the following technical scheme:
on one hand, the invention provides a device for the hydrolysis conversion of organic sulfur in blast furnace gas, which comprises a gas inlet area, a transition area, a catalyst area and a gas outlet area, wherein the gas inlet area is positioned at the upper part of the device, and the transition area, the catalyst area and the gas outlet area are positioned below the gas inlet area and are arranged in a surrounding way from outside to inside;
the lower part of the gas inlet area is provided with a baffling arc plate which separates the gas inlet area from the catalyst area and the gas outlet area, and the gas inlet area is communicated with the transition area; transition district and catalyst district are separated by first V-arrangement grid, catalyst district and the district of giving vent to anger are separated by second V-arrangement grid, the V-arrangement grid encircles the arc muscle by a plurality of triangular prisms and constitutes, two adjacent triangular prism intervals set up in the V-arrangement grid.
In the invention, for the hydrolysis conversion of organic sulfur in blast furnace gas, the key of the design of the device is to ensure that the blast furnace gas rapidly and stably passes through a catalyst area, so the device divides the interior of the hydrolysis conversion device, except an air inlet area, other transition areas, a catalyst area and an air outlet area are arranged in sequence in a surrounding way, the contact area between the areas is greatly increased, the blast furnace gas in the air inlet area enters the transition areas through fractionation and is dispersed, and radially passes through the catalyst area and is collected and then leaves in the air outlet area, wherein, the catalyst area, the transition areas and the air outlet area are separated by adopting a V-shaped grating, the structure of the V-shaped grating adopts a combined structure of arc ribs and triangular prisms, a plurality of triangular prisms surround the outer side of the arc ribs and are arranged at intervals, the blast furnace gas can conveniently pass through, the intervals can lead damaged catalyst particles or dust to be easily taken away by gas, and avoid interface blockage easily caused when a transmission screen or a perforated plate is adopted, the pressure drop loss of blast furnace gas is reduced, and the utilization rate of the catalyst is improved; meanwhile, the V-shaped grating has the advantages of simple structure, high strength, extrusion resistance and low resistance, so that the space occupation ratio of the catalyst area can be properly improved, the treatment capacity and the treatment efficiency of blast furnace gas are improved, the device is stable in operation and high in adaptability, and considerable economic benefits are achieved.
The following technical solutions are preferred technical solutions of the present invention, but not limited to the technical solutions provided by the present invention, and technical objects and advantageous effects of the present invention can be better achieved and achieved by the following technical solutions.
As the preferred technical scheme of the invention, the device integrally takes the shape of a cylindrical tower body and belongs to a pressure container; the device is generally arranged in front of a residual pressure turbine power generation device, and fully utilizes the pressure energy of blast furnace gas after hydrolysis and conversion.
Preferably, the top of the device is provided with an air inlet channel, and the air inlet channel is connected to the air inlet area.
Preferably, the bottom of the device is provided with an air outlet channel, and the tail end of the air outlet area is connected with the air outlet channel.
In the invention, the gas inlet channel and the gas outlet channel are both provided with nitrogen purging interfaces, so that the gas in the tower can be replaced quickly when the catalyst is overhauled or replaced, and potential safety hazards are eliminated.
In a preferred technical scheme of the invention, the top of the catalyst area is provided with a charging hole, and the charging hole penetrates through the gas inlet area and extends out of the device.
Preferably, the bottom of the catalyst zone is provided with a discharge opening.
Preferably, the catalyst in the catalyst zone comprises a bulk catalyst or a shaped catalyst.
Preferably, the bulk catalyst comprises a spherical catalyst and/or a columnar catalyst, and the shaped catalyst comprises a plate catalyst and/or a honeycomb catalyst.
In the present invention, the catalyst zone is an area inside the apparatus, the catalyst is deactivated after the apparatus is operated for a certain period of time, and the catalyst can be independently replaced without disassembling the entire apparatus, and the top and bottom of the catalyst zone are provided with a charging hole and a discharging hole, respectively.
In a preferred embodiment of the present invention, the V-shaped grid is formed by welding the base of a triangular prism to an arc rib.
According to the invention, the triangular prisms and the arc ribs are usually made of metal materials and have corrosion resistance, the triangular prisms are welded to the arc-shaped net ribs in a resistance contact welding mode and surround the arc ribs, the number of the triangular prisms is not limited, and the circular arc ribs can be uniformly surrounded by one circle.
Preferably, the triangular prism has a cross section of an isosceles triangle with a base length of 5 to 20mm, such as 5mm, 8mm, 10mm, 12mm, 15mm, 18mm, or 20mm, but not limited to the recited values, and other values not recited in the range of values are also applicable; the waist length is 8 to 30mm, for example 8mm, 10mm, 15mm, 20mm, 25mm or 30mm, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
Preferably, the distance between the bases of two adjacent triangular prisms is the same and smaller than the diameter of the catalyst in the catalyst area.
Preferably, the distance between the base edges of two adjacent triangular prisms is 4-10 mm, such as 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, but not limited to the values listed, and other values not listed in the range of the values are also applicable.
According to the invention, the overall structure of the V-shaped grating is controlled by selecting the appropriate section size of the triangular prism and the spacing size of two adjacent triangular prisms, so that the V-shaped grating is prevented from occupying too large volume in the device, the spacing size of the triangular prisms is not suitable to be too large, otherwise normal catalyst particles can be lost from gaps of the V-shaped grating, and if the V-shaped grating is too small, dust particles or damaged catalyst particles can be easily accumulated and blocked, the circulation of coal gas is influenced, and the pressure drop is increased.
Preferably, the arc ribs are circular, and the number of the arc ribs in the first V-shaped grating and the second V-shaped grating is at least two, such as two, three, four or five, and the like, and the arc ribs are uniformly distributed along the longitudinal direction of the triangular prism.
In a preferred embodiment of the present invention, the top ends of the triangular prisms of the first V-shaped grid and the second V-shaped grid face in a direction away from the catalyst region.
In the invention, the top end of the triangular prism in the V-shaped grating faces to the gas side, and the bottom end of the triangular prism faces to the catalyst side, so that the arrangement has the following effects: the catalyst particles can be separated by the smaller gap at the bottom edge of the triangular prism, when the top end of the triangular prism faces towards one side of the catalyst, the catalyst particles enter the gap between the adjacent triangular prisms, the problems of uneven catalyst distribution and unsmooth gas circulation are caused, the catalyst particles can be in two-point contact with the gap at the bottom surface of the triangular prism, the pressure drop caused by catalyst blockage is prevented from rising, if the catalyst is damaged, the horn-shaped openings between the prisms can enable damaged catalyst particles or dust to be easily taken away by process fluid, and the blockage of a common silk screen interface is avoided.
Preferably, the first V-shaped grating has a diameter dimension based on the arc ribs of 50-95% of the diameter of the device, such as 50%, 55%, 60%, 65%, 70%, 80%, 88% or 95%, but not limited to the values listed, and other values not listed in this range are also applicable.
Preferably, the diameter of the second V-shaped grating based on the arc ribs is 5-10%, such as 5%, 6%, 7%, 8%, 9% or 10%, but not limited to the values listed, and other values not listed in this range are also applicable.
Preferably, the catalyst loading volume in the catalyst zone is 45 to 90% of the internal volume of the apparatus, such as 45%, 50%, 60%, 65%, 70%, 75%, 80%, 90%, and the like, but is not limited to the recited values, and other values not recited within the range of values are equally applicable.
In the invention, the volume proportion of each area can be basically obtained by converting the diameter of the V-shaped grating, and according to the structure of the device which is commonly used at present, the diameter of the first V-shaped grating, namely the outer diameter of the catalyst area, can be selected from 2-9.6 m, such as 2m, 3m, 4m, 5m, 6m, 9m or 9.6m, and the height can be selected from 2-18.5 m, such as 2m, 5m, 8m, 10m, 12m, 15m or 18.5 m; the diameter of the second V-shaped grating, i.e. the diameter of the gas outlet area, can be selected from 1 to 2.5m, such as 1m, 1.2m, 1.5m, 1.8m, 2m, 2.2m or 2.5m, etc., and the height can be selected from 3 to 18.5m, such as 3m, 5m, 8m, 10m, 12m, 15m or 18.5m, etc.
In a preferred embodiment of the present invention, the first and second V-shaped grills are provided with baffles in the upper regions thereof, and the height of the baffles is 5 to 8% of the height of the corresponding V-shaped grille, for example, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, or 8%, but not limited to the values listed above, and other values not listed above within this range are also applicable.
Preferably, the guide plate is a solid plate and shields the gap between the tops of the triangular prisms.
In another aspect, the present invention provides a method for performing organic sulfur hydrolytic conversion in blast furnace gas by using the above apparatus, the method comprising the following steps:
introducing blast furnace gas into the gas inlet area, shunting, radially entering the catalyst area through the transition area, carrying out hydrolysis conversion reaction on organic sulfur, and discharging reacted gas through the gas outlet area.
As a preferable technical scheme of the invention, the blast furnace gas is firstly subjected to dust removal treatment before being introduced into the gas inlet area.
Preferably, the dust removal treatment comprises bag dust removal and/or electric dust removal.
Preferably, the organic sulfur in the blast furnace gas comprises carbonyl sulfide in an amount of 50 to 300ppm, for example, 50ppm, 100ppm, 120ppm, 150ppm, 200ppm, 250ppm, 270ppm, or 300ppm, but is not limited to the recited values, and other values not recited in the range of the recited values are also applicable.
Preferably, the blast furnace gas is introduced into the gas inlet zone at a temperature of from 80 ℃ to 150 ℃, for example 80 ℃, 100 ℃, 110 ℃, 120 ℃, 130 ℃, 140 ℃ or 150 ℃, but not limited to the recited values, and other values not recited within the range of values are equally applicable.
As a preferred embodiment of the present invention, the catalyst of the catalyst zone comprises any one of an alumina-based catalyst, a zinc oxide-based catalyst or a microcrystalline-based catalyst or a combination of at least two of them, typical but non-limiting examples of which are: a combination of an alumina-based catalyst and a zinc oxide-based catalyst, a combination of a zinc oxide-based catalyst and a microcrystalline-based catalyst, a combination of an alumina-based catalyst, a zinc oxide-based catalyst, and a microcrystalline-based catalyst, and the like.
Preferably, the temperature of the hydrolytic conversion reaction is 80 to 150 ℃, for example 80 ℃, 100 ℃, 110 ℃, 120 ℃, 130 ℃, 140 ℃ or 150 ℃, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
Preferably, the pressure of the hydrolytic conversion reaction is 0.1 to 0.5MPa, such as 0.1MPa, 0.2MPa, 0.25MPa, 0.3MPa, 0.4MPa or 0.5MPa, but is not limited to the recited values, and other values not recited within the range of values are also applicable.
Preferably, the volume space velocity of the hydrolysis conversion reaction is 500-2000 h-1E.g. 500h-1、800h-1、1000h-1、1200h-1、1500h-1、1800h-1Or 2000h-1And the like, but are not limited to the recited values, and other values not recited within the numerical range are also applicable.
In the hydrolysis conversion reaction, carbonyl sulfur reacts with water to generate carbon dioxide and hydrogen sulfide, and organic sulfur is converted into inorganic sulfide, so that subsequent desulfurization treatment is facilitated.
In a preferred embodiment of the present invention, carbonyl sulfide is converted into hydrogen sulfide after the hydrolysis reaction, and the pressure loss of the gas after the reaction is not more than 1% of the initial pressure, for example, 1%, 0.8%, 0.6%, 0.5%, 0.4%, 0.2%, or 0.1%, but the gas is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable.
Preferably, the reacted gas is sequentially subjected to residual pressure power generation and desulfurization treatment.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the device, through the division of each region in the device, particularly the structural design of the V-shaped grating of the catalyst region and the two side region separation assemblies, damaged catalyst particles or dust are easily taken away by gas, the blockage of a contact interface is avoided, the pressure drop loss of blast furnace gas is reduced, the utilization rate of the catalyst is improved, and the utilization rate of the catalyst can reach more than 99.2%;
(2) the V-shaped grating has simple structure, high strength, extrusion resistance and small resistance, so that the space occupation ratio of a catalyst area can be improved, the treatment efficiency of blast furnace gas is improved, and the conversion rate of organic sulfur can reach more than 99.3 percent;
(3) the device has the advantages of clear structural division, stable operation, strong adaptability, lower cost and good economic benefit.
Drawings
FIG. 1 is a schematic view of the internal structure of an apparatus for the hydrolytic conversion of organic sulfur in blast furnace gas according to example 1 of the present invention;
FIG. 2 is a schematic diagram showing the distribution of triangular prisms in the V-shaped grid provided in example 1 of the present invention;
the device comprises a gas inlet area, a transition area, a catalyst area, a gas outlet area, a gas inlet channel, a gas outlet channel, a baffle plate, a gas inlet channel, a gas outlet channel, a gas baffle plate, a first V-shaped grating, a second V-shaped grating, a charging hole and a discharging hole, wherein the gas inlet area is 1 part, the transition area is 2 part, the catalyst area is 3 part, the gas outlet area is 4 part, the gas inlet channel is 5 part, the gas outlet channel is 6 part, the baffle plate is 7 part, the first V-shaped grating is 8 part, the second V-shaped grating is 9 part, the charging hole is 10 part, and the discharging hole is 11 part.
Detailed Description
In order to better illustrate the present invention and facilitate the understanding of the technical solutions of the present invention, the present invention is further described in detail below. However, the following examples are only simple examples of the present invention and do not represent or limit the scope of the present invention, which is defined by the claims.
The invention provides a device and a method for hydrolyzing and converting organic sulfur in blast furnace gas, wherein the device comprises an air inlet region 1, a transition region 2, a catalyst region 3 and an air outlet region 4, the air inlet region 1 is positioned at the upper part of the device, and the transition region 2, the catalyst region 3 and the air outlet region 4 are positioned below the air inlet region 1 and are arranged from outside to inside in a surrounding way;
the lower part of the gas inlet area 1 is provided with a baffling arc plate 7 which separates the gas inlet area 1 from the catalyst area 3 and the gas outlet area 4, and the gas inlet area 1 is communicated with the transition area 2; transition zone 2 and catalyst district 3 are separated by first V-arrangement grid 8, catalyst district 3 and the district 4 of giving vent to anger are separated by second V-arrangement grid 9, the V-arrangement grid comprises a plurality of triangular prisms around the arc muscle, two adjacent triangular prism intervals set up in the V-arrangement grid.
The method comprises the following steps:
blast furnace gas is introduced into the gas inlet region 1, is divided and then radially enters the catalyst region 3 through the transition region 2, organic sulfur undergoes hydrolysis conversion reaction, and the reacted gas is discharged through the gas outlet region 4.
The following are typical but non-limiting examples of the invention:
example 1:
the embodiment provides a device for the hydrolysis and conversion of organic sulfur in blast furnace gas, the internal structure of the device is schematically shown in fig. 1, and the device comprises an air inlet region 1, a transition region 2, a catalyst region 3 and an air outlet region 4, wherein the air inlet region 1 is positioned at the upper part of the device, and the transition region 2, the catalyst region 3 and the air outlet region 4 are all positioned below the air inlet region 1 and arranged from outside to inside in a surrounding manner;
the lower part of the gas inlet area 1 is provided with a baffling arc plate 7 which separates the gas inlet area 1 from the catalyst area 3 and the gas outlet area 4, and the gas inlet area 1 is communicated with the transition area 2; transition zone 2 and catalyst district 3 are separated by first V-arrangement grid 8, catalyst district 3 and the district 4 of giving vent to anger are separated by second V-arrangement grid 9, V-arrangement grid encircles the arc muscle by a plurality of triangular prisms and constitutes, triangular prism's distribution schematic diagram is shown in figure 2 in the V-arrangement grid, and two adjacent triangular prism intervals set up.
The whole device is a cylindrical tower body.
The top of device is equipped with intake duct 5, intake duct 5 is connected to intake zone 1.
The bottom of the device is provided with an air outlet channel 6, and the tail end of the air outlet area 4 is connected with the air outlet channel 6.
The top of the catalyst zone 3 is provided with a charging hole 10, and the charging hole 10 penetrates through the gas inlet zone 1 and extends out of the device; the bottom of the catalyst zone 3 is provided with a discharge hole 11.
The catalyst in the catalyst zone 3 is a spherical bulk catalyst.
The V-shaped grating is formed by welding the bottom edge of a triangular prism to an arc rib; the cross section of the triangular prism is an isosceles triangle, the length of the bottom side is 10mm, and the length of the waist is 20 mm; the distance between the bottom edges of two adjacent triangular prisms is 6mm, which is smaller than the diameter of the catalyst in the catalyst area 3.
The arc ribs are circular, and the number of the arc ribs in the first V-shaped grating 8 and the second V-shaped grating 9 is three and is longitudinally and uniformly distributed along the triangular prism.
The tops of the triangular prisms in the first V-shaped grating 8 and the second V-shaped grating 9 face to the direction far away from the catalyst area 3; the diameter of the first V-shaped grating 8 based on the arc ribs accounts for 95 percent of the diameter of the device; the diameter of the second V-shaped grating 9 based on the arc ribs accounts for 5 percent of the diameter of the device.
The packed volume of catalyst in the catalyst zone 3 represents 90% of the internal volume of the apparatus.
The upper areas of the first V-shaped grating 8 and the second V-shaped grating 9 are provided with guide plates, and the height of each guide plate accounts for 5% of the height of the corresponding V-shaped grating; the guide plate is a solid plate and shields the gap between the tops of the triangular prisms.
Example 2:
the embodiment provides a device for the hydrolysis conversion of organic sulfur in blast furnace gas, which comprises a gas inlet area 1, a transition area 2, a catalyst area 3 and a gas outlet area 4, wherein the gas inlet area 1 is positioned at the upper part of the device, and the transition area 2, the catalyst area 3 and the gas outlet area 4 are all positioned below the gas inlet area 1 and are arranged in a surrounding manner from outside to inside;
the lower part of the gas inlet area 1 is provided with a baffling arc plate 7 which separates the gas inlet area 1 from the catalyst area 3 and the gas outlet area 4, and the gas inlet area 1 is communicated with the transition area 2; transition zone 2 and catalyst district 3 are separated by first V-arrangement grid 8, catalyst district 3 and the district 4 of giving vent to anger are separated by second V-arrangement grid 9, the V-arrangement grid comprises a plurality of triangular prisms around the arc muscle, two adjacent triangular prism intervals set up in the V-arrangement grid.
The whole device is a cylindrical tower body.
The top of device is equipped with intake duct 5, intake duct 5 is connected to intake zone 1.
The bottom of the device is provided with an air outlet channel 6, and the tail end of the air outlet area 4 is connected with the air outlet channel 6.
And sealing valves are arranged on the air inlet channel 5 and the air outlet channel 6.
The top of the catalyst zone 3 is provided with a charging hole 10, and the charging hole 10 penetrates through the gas inlet zone 1 and extends out of the device; the bottom of the catalyst zone 3 is provided with a discharge hole 11.
The catalyst in the catalyst zone 3 is a honeycomb shaped catalyst.
The V-shaped grating is formed by welding the bottom edge of a triangular prism to an arc rib; the cross section of the triangular prism is an isosceles triangle, the length of the bottom side is 5mm, and the length of the waist is 10 mm; the distance between the bottom edges of two adjacent triangular prisms is 4mm, which is smaller than the diameter of the catalyst in the catalyst area 3.
The arc muscle is circular, and the quantity of the arc muscle in first V-arrangement grid 8 and the second V-arrangement grid 9 is two, along the vertical evenly distributed of triangular prism.
The tops of the triangular prisms in the first V-shaped grating 8 and the second V-shaped grating 9 face to the direction far away from the catalyst area 3; the diameter of the first V-shaped grating 8 based on the arc ribs accounts for 80 percent of the diameter of the device; the diameter of the second V-shaped grating 9 based on the arc ribs accounts for 10 percent of the diameter of the device.
The packed volume of catalyst in the catalyst zone 3 represents 75% of the internal volume of the apparatus.
The upper areas of the first V-shaped grating 8 and the second V-shaped grating 9 are provided with guide plates, and the height of each guide plate accounts for 7% of the height of the corresponding V-shaped grating; the guide plate is a solid plate and shields the gap between the tops of the triangular prisms.
Example 3:
the embodiment provides a device for the hydrolysis conversion of organic sulfur in blast furnace gas, which comprises a gas inlet area 1, a transition area 2, a catalyst area 3 and a gas outlet area 4, wherein the gas inlet area 1 is positioned at the upper part of the device, and the transition area 2, the catalyst area 3 and the gas outlet area 4 are all positioned below the gas inlet area 1 and are arranged in a surrounding manner from outside to inside;
the lower part of the gas inlet area 1 is provided with a baffling arc plate 7 which separates the gas inlet area 1 from the catalyst area 3 and the gas outlet area 4, and the gas inlet area 1 is communicated with the transition area 2; transition zone 2 and catalyst district 3 are separated by first V-arrangement grid 8, catalyst district 3 and the district 4 of giving vent to anger are separated by second V-arrangement grid 9, the V-arrangement grid comprises a plurality of triangular prisms around the arc muscle, two adjacent triangular prism intervals set up in the V-arrangement grid.
The whole device is a cylindrical tower body.
The top of device is equipped with intake duct 5, intake duct 5 is connected to intake zone 1.
The bottom of the device is provided with an air outlet channel 6, and the tail end of the air outlet area 4 is connected with the air outlet channel 6.
The top of the catalyst zone 3 is provided with a charging hole 10, and the charging hole 10 penetrates through the gas inlet zone 1 and extends out of the device; the bottom of the catalyst zone 3 is provided with a discharge hole 11.
The catalyst in the catalyst zone 3 is a mixture of spherical catalyst and columnar catalyst.
The V-shaped grating is formed by welding the bottom edge of a triangular prism to an arc rib; the cross section of the triangular prism is an isosceles triangle, the length of the bottom side is 20mm, and the length of the waist is 30 mm; the distance between the bottom edges of two adjacent triangular prisms is 10mm, which is smaller than the diameter of the catalyst in the catalyst area 3.
The arc ribs are circular, and the number of the arc ribs in the first V-shaped grating 8 and the second V-shaped grating 9 is four and is longitudinally and uniformly distributed along the triangular prism.
The tops of the triangular prisms in the first V-shaped grating 8 and the second V-shaped grating 9 face to the direction far away from the catalyst area 3; the diameter of the first V-shaped grating 8 based on the arc ribs accounts for 65% of the diameter of the device; the diameter of the second V-shaped grating 9 based on the arc ribs accounts for 8 percent of the diameter of the device.
The packed volume of catalyst in the catalyst zone 3 was 60% of the internal volume of the apparatus.
The upper areas of the first V-shaped grating 8 and the second V-shaped grating 9 are provided with guide plates, and the height of each guide plate accounts for 8% of the height of the corresponding V-shaped grating; the guide plate is a solid plate and shields the gap between the tops of the triangular prisms.
Example 4:
the embodiment provides a method for the hydrolytic conversion of organic sulfur in blast furnace gas, which is carried out by adopting the device in the embodiment 1 and comprises the following steps:
firstly, performing dust removal treatment on blast furnace gas, wherein the dust removal treatment comprises cloth bag dust removal, and the blast furnace gas isThe organic sulfur comprises carbonyl sulfur with the content of 250ppm, and then is introduced into the gas inlet area 1, the temperature introduced into the gas inlet area 1 is 120 ℃, the organic sulfur passes through the transition area 2 after being shunted by the baffle plate 7 and then radially enters the catalyst area 3 after passing through the first V-shaped grid 8, the catalyst of the catalyst area 3 is an alumina-based catalyst, the organic sulfur undergoes hydrolysis conversion reaction, the temperature of the hydrolysis conversion reaction is 120 ℃, the pressure is 0.25MPa, and the volume space velocity is 850h-1And carbonyl sulfide is converted into hydrogen sulfide after the reaction, the pressure loss of the gas after the reaction is 0.5 percent of the initial pressure, and the gas is discharged from the gas outlet area 4 and then sequentially subjected to excess pressure power generation and desulfurization treatment.
In the embodiment, the corresponding device and the method are adopted to carry out the hydrolysis conversion of the organic sulfur in the blast furnace gas, the structural design of the device reduces the pressure drop loss of the blast furnace gas, the utilization rate of the catalyst can reach 99.5 percent, and the conversion rate of the organic sulfur can reach 99.6 percent after the hydrolysis conversion reaction.
Example 5:
the embodiment provides a method for the hydrolytic conversion of organic sulfur in blast furnace gas, which is carried out by adopting the device in the embodiment 1 and comprises the following steps:
firstly, performing dust removal treatment on blast furnace gas, wherein the dust removal treatment comprises electric dust removal, organic sulfur in the blast furnace gas comprises carbonyl sulfur with the content of 100ppm, then introducing the carbonyl sulfur into an air inlet region 1, the temperature of the gas introduced into the air inlet region 1 is 150 ℃, the gas is shunted by a baffle plate 7, passes through a transition region 2 and radially enters a catalyst region 3 through a first V-shaped grid 8, a catalyst in the catalyst region 3 is a zinc oxide-based catalyst, the organic sulfur performs hydrolysis conversion reaction, the temperature of the hydrolysis conversion reaction is 150 ℃, the pressure is 0.15MPa, and the volume space velocity is 1000h-1And carbonyl sulfide is converted into hydrogen sulfide after the reaction, the pressure loss of the gas after the reaction is 0.75 percent of the initial pressure, and the gas is discharged from the gas outlet area 4 and then sequentially subjected to excess pressure power generation and desulfurization treatment.
In the embodiment, the corresponding device and the method are adopted to carry out the hydrolysis conversion of the organic sulfur in the blast furnace gas, the structural design of the device reduces the pressure drop loss of the blast furnace gas, the utilization rate of the catalyst can reach 99.3 percent, and the conversion rate of the organic sulfur can reach 99.5 percent after the hydrolysis conversion reaction.
Example 6:
the embodiment provides a method for the hydrolytic conversion of organic sulfur in blast furnace gas, which is carried out by adopting the device in the embodiment 2 and comprises the following steps:
firstly, carrying out dust removal treatment on blast furnace gas, wherein the dust removal treatment comprises cloth bag dust removal, organic sulfur in the blast furnace gas comprises carbonyl sulfur with the content of 300ppm, then introducing the carbonyl sulfur into an air inlet region 1, wherein the temperature of the introduced air inlet region 1 is 80 ℃, the carbonyl sulfur passes through a transition region 2 after being shunted by a baffle plate 7, and passes through a first V-shaped grid 8 to radially enter a catalyst region 3, a catalyst in the catalyst region 3 is a microcrystal-based catalyst, the organic sulfur is subjected to hydrolysis conversion reaction, the temperature of the hydrolysis conversion reaction is 80 ℃, the pressure is 0.5MPa, and the volume space velocity is 1700h-1And the pressure loss of the gas after the reaction is 0.4 percent of the initial pressure, and the gas is discharged from the gas outlet area 4 and then sequentially subjected to residual pressure power generation.
In the embodiment, the corresponding device and the method are adopted to carry out the hydrolysis conversion of the organic sulfur in the blast furnace gas, the structural design of the device reduces the pressure drop loss of the blast furnace gas, the utilization rate of the catalyst can reach 99.2 percent, and the removal rate of the organic sulfur after the hydrolysis conversion reaction can reach 99.3 percent.
Comparative example 1:
this comparative example provides an apparatus for the hydrolytic conversion of organic sulphur in blast furnace gas, the structure of which is referred to that of example 1, with the only difference that: the first V-shaped grid 8 and the second V-shaped grid 9 are replaced by wire meshes.
In the comparative example, because the catalyst area and the adjacent area in the device are separated by the traditional wire mesh component, the gas-solid contact interface is easy to block, so that the blast furnace gas is difficult to circulate, the pressure drop loss of the blast furnace gas is increased by 95 percent compared with that of the blast furnace gas in example 1, the utilization rate of the catalyst is reduced to 69 percent, and the continuous and stable operation time of the device is shortened.
It can be seen from the above examples and comparative examples that the apparatus of the present invention, through the division of each region in the apparatus, especially the structural design of the V-shaped grating of the catalyst region and the partition components of the two side regions, makes the damaged catalyst particles or dust easily taken away by gas, avoids the blockage of the contact interface, reduces the pressure drop loss of blast furnace gas, and improves the catalyst utilization rate, which can reach more than 99.2%; the V-shaped grating has simple structure, high strength, extrusion resistance and small resistance, so that the space occupation ratio of the catalyst area can be improved, the treatment efficiency of blast furnace gas is improved, and the conversion rate of organic sulfur can reach more than 99.3 percent; the device has the advantages of clear structural division, stable operation, strong adaptability, lower cost and good economic benefit.
The applicant states that the present invention is illustrated by the detailed apparatus and method of the present invention through the above embodiments, but the present invention is not limited to the above detailed apparatus and method, i.e. it is not meant to imply that the present invention must be implemented by the above detailed apparatus and method. It will be apparent to those skilled in the art that any modifications to the present invention, equivalents of the means for substitution and addition of means for carrying out the invention, selection of specific means, etc., are within the scope and disclosure of the invention.
Claims (10)
1. The device for the hydrolysis conversion of organic sulfur in blast furnace gas is characterized by comprising a gas inlet area, a transition area, a catalyst area and a gas outlet area, wherein the gas inlet area is positioned at the upper part of the device, and the transition area, the catalyst area and the gas outlet area are positioned below the gas inlet area and are arranged in a surrounding manner from outside to inside;
the lower part of the gas inlet area is provided with a baffling arc plate which separates the gas inlet area from the catalyst area and the gas outlet area, and the gas inlet area is communicated with the transition area; transition district and catalyst district are separated by first V-arrangement grid, catalyst district and the district of giving vent to anger are separated by second V-arrangement grid, the V-arrangement grid encircles the arc muscle by a plurality of triangular prisms and constitutes, two adjacent triangular prism intervals set up in the V-arrangement grid.
2. The apparatus for hydrolytic conversion of claim 1 wherein the apparatus is integrally formed as a cylindrical tower;
preferably, an air inlet channel is arranged at the top of the device and connected to the air inlet area;
preferably, the bottom of the device is provided with an air outlet channel, and the tail end of the air outlet area is connected with the air outlet channel.
3. The apparatus for hydroconversion according to claim 1 or 2, wherein the top of the catalyst zone is provided with a charging hole extending through the gas inlet zone to the outside of the apparatus;
preferably, the bottom of the catalyst area is provided with a discharge hole;
preferably, the catalyst in the catalyst zone comprises a bulk catalyst or a shaped catalyst;
preferably, the bulk catalyst comprises a spherical catalyst and/or a columnar catalyst, and the shaped catalyst comprises a plate catalyst and/or a honeycomb catalyst.
4. The apparatus for hydrolytic conversion of any of claims 1 to 3, wherein the V-shaped grid is formed by welding the base of a triangular prism to a curved rib;
preferably, the cross section of the triangular prism is an isosceles triangle, the length of the bottom side is 5-20 mm, and the length of the waist is 8-30 mm;
preferably, the distance between the bottom edges of two adjacent triangular prisms is the same and is smaller than the diameter of the catalyst in the catalyst area;
preferably, the distance between the bottom edges of two adjacent triangular prisms is 4-10 mm;
preferably, the arc ribs are circular, and the number of the arc ribs in the first V-shaped grating and the second V-shaped grating is at least two independently and is uniformly distributed along the longitudinal direction of the triangular prism.
5. The apparatus for hydrolytic conversion of any of claims 1 to 4 wherein the apexes of the triangular prisms in each of the first and second V-shaped grids face away from the catalyst zone;
preferably, the diameter of the first V-shaped grating based on the arc ribs accounts for 50-95% of the diameter of the device;
preferably, the diameter of the second V-shaped grating based on the arc ribs accounts for 5-10% of the diameter of the device;
preferably, the filling volume of the catalyst in the catalyst area accounts for 45-90% of the internal volume of the device.
6. The apparatus for hydrolysis conversion according to any one of claims 1 to 5, wherein the upper regions of the first and second V-shaped grids are provided with baffles, and the height of each baffle occupies 5 to 8% of the height of the corresponding V-shaped grid;
preferably, the guide plate is a solid plate and shields the gap between the tops of the triangular prisms.
7. The method for the hydrolytic conversion of organic sulfur in blast furnace gas by the device according to any one of claims 1 to 6, characterized in that the method comprises the following steps:
introducing blast furnace gas into the gas inlet area, shunting, radially entering the catalyst area through the transition area, carrying out hydrolysis conversion reaction on organic sulfur, and discharging reacted gas through the gas outlet area.
8. The method according to claim 7, characterized in that the blast furnace gas is dedusted before being introduced into the gas inlet zone;
preferably, the dust removal treatment comprises bag dust removal and/or electric dust removal;
preferably, the organic sulfur in the blast furnace gas comprises carbonyl sulfur, and the content of the carbonyl sulfur is 50-300 ppm;
preferably, the temperature of the blast furnace gas introduced into the gas inlet area is 80-150 ℃.
9. The process of claim 7 or 8, wherein the catalyst of the catalyst zone comprises any one or a combination of at least two of an alumina-based catalyst, a zinc oxide-based catalyst, or a microcrystalline-based catalyst;
preferably, the temperature of the hydrolysis conversion reaction is 80-150 ℃;
preferably, the pressure of the hydrolysis conversion reaction is 0.1-0.5 MPa;
preferably, the volume space velocity of the hydrolysis conversion reaction is 500-2000 h-1。
10. The process of any one of claims 7 to 9, wherein after the hydrolytic conversion reaction, the carbonyl sulfide is converted to hydrogen sulfide and the pressure loss of the gas after the reaction is not more than 1% of the initial pressure;
preferably, the reacted gas is sequentially subjected to residual pressure power generation and desulfurization treatment.
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| CN116726681A (en) * | 2023-08-14 | 2023-09-12 | 北京中航泰达环保科技股份有限公司 | Dry desulfurization, denitrification and dust removal integrated device and system |
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| CN112646614A (en) * | 2020-11-30 | 2021-04-13 | 中国科学院过程工程研究所 | Moving bed type blast furnace gas desulfurization device and desulfurization method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112646614A (en) * | 2020-11-30 | 2021-04-13 | 中国科学院过程工程研究所 | Moving bed type blast furnace gas desulfurization device and desulfurization method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116726681A (en) * | 2023-08-14 | 2023-09-12 | 北京中航泰达环保科技股份有限公司 | Dry desulfurization, denitrification and dust removal integrated device and system |
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